Mellanox mlx4
M: Adrien Mazarguil <adrien.mazarguil@6wind.com>
-F: lib/librte_pmd_mlx4/
+F: drivers/net/mlx4/
F: doc/guides/nics/mlx4.rst
RedHat virtio
+-- librte_mempool # memory pool manager (fixedsized objects)
+-- librte_meter # QoS metering library
+-- librte_net # various IP-related headers
- +-- librte_pmd_mlx4 # Mellanox ConnectX-3 poll mode driver
+-- librte_pmd_pcap # PCAP poll mode driver
+-- librte_pmd_ring # ring poll mode driver
+-- librte_pmd_virtio # virtio poll mode driver
+-- fm10k # Host interface PMD driver for FM10000 Series
+-- i40e # 40GbE poll mode driver
+-- ixgbe # 10GbE poll mode driver
+ +-- mlx4 # Mellanox ConnectX-3 poll mode driver
Applications
------------
DIRS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += fm10k
DIRS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e
DIRS-$(CONFIG_RTE_LIBRTE_IXGBE_PMD) += ixgbe
+DIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += mlx4
include $(RTE_SDK)/mk/rte.sharelib.mk
include $(RTE_SDK)/mk/rte.subdir.mk
--- /dev/null
+# BSD LICENSE
+#
+# Copyright 2012-2015 6WIND S.A.
+# Copyright 2012 Mellanox.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of 6WIND S.A. nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# Library name.
+LIB = librte_pmd_mlx4.a
+
+# Sources.
+SRCS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += mlx4.c
+
+# Dependencies.
+DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_ether
+DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_mbuf
+DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_eal
+DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_mempool
+DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_malloc
+
+# Basic CFLAGS.
+CFLAGS += -O3
+CFLAGS += -std=gnu99 -Wall -Wextra
+CFLAGS += -g
+CFLAGS += -I.
+CFLAGS += -D_XOPEN_SOURCE=600
+CFLAGS += $(WERROR_FLAGS)
+
+# A few warnings cannot be avoided in external headers.
+CFLAGS += -Wno-error=cast-qual
+
+EXPORT_MAP := rte_pmd_mlx4_version.map
+LIBABIVER := 1
+
+# DEBUG which is usually provided on the command-line may enable
+# CONFIG_RTE_LIBRTE_MLX4_DEBUG.
+ifeq ($(DEBUG),1)
+CONFIG_RTE_LIBRTE_MLX4_DEBUG := y
+endif
+
+# User-defined CFLAGS.
+ifeq ($(CONFIG_RTE_LIBRTE_MLX4_DEBUG),y)
+CFLAGS += -pedantic -UNDEBUG -DPEDANTIC
+else
+CFLAGS += -DNDEBUG -UPEDANTIC
+endif
+
+ifdef CONFIG_RTE_LIBRTE_MLX4_SGE_WR_N
+CFLAGS += -DMLX4_PMD_SGE_WR_N=$(CONFIG_RTE_LIBRTE_MLX4_SGE_WR_N)
+endif
+
+ifdef CONFIG_RTE_LIBRTE_MLX4_MAX_INLINE
+CFLAGS += -DMLX4_PMD_MAX_INLINE=$(CONFIG_RTE_LIBRTE_MLX4_MAX_INLINE)
+endif
+
+ifdef CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE
+CFLAGS += -DMLX4_PMD_TX_MP_CACHE=$(CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE)
+endif
+
+ifdef CONFIG_RTE_LIBRTE_MLX4_SOFT_COUNTERS
+CFLAGS += -DMLX4_PMD_SOFT_COUNTERS=$(CONFIG_RTE_LIBRTE_MLX4_SOFT_COUNTERS)
+endif
+
+include $(RTE_SDK)/mk/rte.lib.mk
+
+# Generate and clean-up mlx4_autoconf.h.
+
+export CC CFLAGS CPPFLAGS EXTRA_CFLAGS EXTRA_CPPFLAGS
+export AUTO_CONFIG_CFLAGS = -Wno-error
+
+ifndef V
+AUTOCONF_OUTPUT := >/dev/null
+endif
+
+mlx4_autoconf.h: $(RTE_SDK)/scripts/auto-config-h.sh
+ $Q $(RM) -f -- '$@'
+ $Q sh -- '$<' '$@' \
+ RSS_SUPPORT \
+ infiniband/verbs.h \
+ enum IBV_EXP_DEVICE_UD_RSS $(AUTOCONF_OUTPUT)
+ $Q sh -- '$<' '$@' \
+ INLINE_RECV \
+ infiniband/verbs.h \
+ enum IBV_EXP_DEVICE_ATTR_INLINE_RECV_SZ $(AUTOCONF_OUTPUT)
+ $Q sh -- '$<' '$@' \
+ SEND_RAW_WR_SUPPORT \
+ infiniband/verbs.h \
+ type 'struct ibv_send_wr_raw' $(AUTOCONF_OUTPUT)
+
+mlx4.o: mlx4_autoconf.h
+
+clean_mlx4: FORCE
+ $Q rm -f -- mlx4_autoconf.h
+
+clean: clean_mlx4
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright 2012-2015 6WIND S.A.
+ * Copyright 2012 Mellanox.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of 6WIND S.A. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Known limitations:
+ * - Multiple RX VLAN filters can be configured, but only the first one
+ * works properly.
+ * - RSS hash key and options cannot be modified.
+ * - Hardware counters aren't implemented.
+ */
+
+/* System headers. */
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <limits.h>
+#include <assert.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <dirent.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <linux/if.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>
+
+/* Verbs header. */
+/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-pedantic"
+#endif
+#include <infiniband/verbs.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-pedantic"
+#endif
+
+/* DPDK headers don't like -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-pedantic"
+#endif
+#include <rte_config.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_dev.h>
+#include <rte_mbuf.h>
+#include <rte_errno.h>
+#include <rte_mempool.h>
+#include <rte_prefetch.h>
+#include <rte_malloc.h>
+#include <rte_spinlock.h>
+#include <rte_atomic.h>
+#include <rte_version.h>
+#include <rte_log.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-pedantic"
+#endif
+
+/* Generated configuration header. */
+#include "mlx4_autoconf.h"
+
+/* PMD header. */
+#include "mlx4.h"
+
+/* Runtime logging through RTE_LOG() is enabled when not in debugging mode.
+ * Intermediate LOG_*() macros add the required end-of-line characters. */
+#ifndef NDEBUG
+#define INFO(...) DEBUG(__VA_ARGS__)
+#define WARN(...) DEBUG(__VA_ARGS__)
+#define ERROR(...) DEBUG(__VA_ARGS__)
+#else
+#define LOG__(level, m, ...) \
+ RTE_LOG(level, PMD, MLX4_DRIVER_NAME ": " m "%c", __VA_ARGS__)
+#define LOG_(level, ...) LOG__(level, __VA_ARGS__, '\n')
+#define INFO(...) LOG_(INFO, __VA_ARGS__)
+#define WARN(...) LOG_(WARNING, __VA_ARGS__)
+#define ERROR(...) LOG_(ERR, __VA_ARGS__)
+#endif
+
+/* Convenience macros for accessing mbuf fields. */
+#define NEXT(m) ((m)->next)
+#define DATA_LEN(m) ((m)->data_len)
+#define PKT_LEN(m) ((m)->pkt_len)
+#define DATA_OFF(m) ((m)->data_off)
+#define SET_DATA_OFF(m, o) ((m)->data_off = (o))
+#define NB_SEGS(m) ((m)->nb_segs)
+#define PORT(m) ((m)->port)
+
+/* Work Request ID data type (64 bit). */
+typedef union {
+ struct {
+ uint32_t id;
+ uint16_t offset;
+ } data;
+ uint64_t raw;
+} wr_id_t;
+
+#define WR_ID(o) (((wr_id_t *)&(o))->data)
+
+/* Compile-time check. */
+static inline void wr_id_t_check(void)
+{
+ wr_id_t check[1 + (2 * -!(sizeof(wr_id_t) == sizeof(uint64_t)))];
+
+ (void)check;
+ (void)wr_id_t_check;
+}
+
+/* If raw send operations are available, use them since they are faster. */
+#ifdef SEND_RAW_WR_SUPPORT
+typedef struct ibv_send_wr_raw mlx4_send_wr_t;
+#define mlx4_post_send ibv_post_send_raw
+#else
+typedef struct ibv_send_wr mlx4_send_wr_t;
+#define mlx4_post_send ibv_post_send
+#endif
+
+struct mlx4_rxq_stats {
+ unsigned int idx; /**< Mapping index. */
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ uint64_t ipackets; /**< Total of successfully received packets. */
+ uint64_t ibytes; /**< Total of successfully received bytes. */
+#endif
+ uint64_t idropped; /**< Total of packets dropped when RX ring full. */
+ uint64_t rx_nombuf; /**< Total of RX mbuf allocation failures. */
+};
+
+struct mlx4_txq_stats {
+ unsigned int idx; /**< Mapping index. */
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ uint64_t opackets; /**< Total of successfully sent packets. */
+ uint64_t obytes; /**< Total of successfully sent bytes. */
+#endif
+ uint64_t odropped; /**< Total of packets not sent when TX ring full. */
+};
+
+/* RX element (scattered packets). */
+struct rxq_elt_sp {
+ struct ibv_recv_wr wr; /* Work Request. */
+ struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
+ struct rte_mbuf *bufs[MLX4_PMD_SGE_WR_N]; /* SGEs buffers. */
+};
+
+/* RX element. */
+struct rxq_elt {
+ struct ibv_recv_wr wr; /* Work Request. */
+ struct ibv_sge sge; /* Scatter/Gather Element. */
+ /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
+};
+
+/* RX queue descriptor. */
+struct rxq {
+ struct priv *priv; /* Back pointer to private data. */
+ struct rte_mempool *mp; /* Memory Pool for allocations. */
+ struct ibv_mr *mr; /* Memory Region (for mp). */
+ struct ibv_cq *cq; /* Completion Queue. */
+ struct ibv_qp *qp; /* Queue Pair. */
+ /*
+ * There is exactly one flow configured per MAC address. Each flow
+ * may contain several specifications, one per configured VLAN ID.
+ */
+ BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
+ struct ibv_exp_flow *mac_flow[MLX4_MAX_MAC_ADDRESSES];
+ struct ibv_exp_flow *promisc_flow; /* Promiscuous flow. */
+ struct ibv_exp_flow *allmulti_flow; /* Multicast flow. */
+ unsigned int port_id; /* Port ID for incoming packets. */
+ unsigned int elts_n; /* (*elts)[] length. */
+ union {
+ struct rxq_elt_sp (*sp)[]; /* Scattered RX elements. */
+ struct rxq_elt (*no_sp)[]; /* RX elements. */
+ } elts;
+ unsigned int sp:1; /* Use scattered RX elements. */
+ uint32_t mb_len; /* Length of a mp-issued mbuf. */
+ struct mlx4_rxq_stats stats; /* RX queue counters. */
+ unsigned int socket; /* CPU socket ID for allocations. */
+};
+
+/* TX element. */
+struct txq_elt {
+ mlx4_send_wr_t wr; /* Work Request. */
+ struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
+ /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
+};
+
+/* Linear buffer type. It is used when transmitting buffers with too many
+ * segments that do not fit the hardware queue (see max_send_sge).
+ * Extra segments are copied (linearized) in such buffers, replacing the
+ * last SGE during TX.
+ * The size is arbitrary but large enough to hold a jumbo frame with
+ * 8 segments considering mbuf.buf_len is about 2048 bytes. */
+typedef uint8_t linear_t[16384];
+
+/* TX queue descriptor. */
+struct txq {
+ struct priv *priv; /* Back pointer to private data. */
+ struct {
+ struct rte_mempool *mp; /* Cached Memory Pool. */
+ struct ibv_mr *mr; /* Memory Region (for mp). */
+ uint32_t lkey; /* mr->lkey */
+ } mp2mr[MLX4_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
+ struct ibv_cq *cq; /* Completion Queue. */
+ struct ibv_qp *qp; /* Queue Pair. */
+#if MLX4_PMD_MAX_INLINE > 0
+ uint32_t max_inline; /* Max inline send size <= MLX4_PMD_MAX_INLINE. */
+#endif
+ unsigned int elts_n; /* (*elts)[] length. */
+ struct txq_elt (*elts)[]; /* TX elements. */
+ unsigned int elts_head; /* Current index in (*elts)[]. */
+ unsigned int elts_tail; /* First element awaiting completion. */
+ unsigned int elts_comp; /* Number of completion requests. */
+ struct mlx4_txq_stats stats; /* TX queue counters. */
+ linear_t (*elts_linear)[]; /* Linearized buffers. */
+ struct ibv_mr *mr_linear; /* Memory Region for linearized buffers. */
+ unsigned int socket; /* CPU socket ID for allocations. */
+};
+
+struct priv {
+ struct rte_eth_dev *dev; /* Ethernet device. */
+ struct ibv_context *ctx; /* Verbs context. */
+ struct ibv_device_attr device_attr; /* Device properties. */
+ struct ibv_port_attr port_attr; /* Physical port properties. */
+ struct ibv_pd *pd; /* Protection Domain. */
+ /*
+ * MAC addresses array and configuration bit-field.
+ * An extra entry that cannot be modified by the DPDK is reserved
+ * for broadcast frames (destination MAC address ff:ff:ff:ff:ff:ff).
+ */
+ struct ether_addr mac[MLX4_MAX_MAC_ADDRESSES];
+ BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
+ /* VLAN filters. */
+ struct {
+ unsigned int enabled:1; /* If enabled. */
+ unsigned int id:12; /* VLAN ID (0-4095). */
+ } vlan_filter[MLX4_MAX_VLAN_IDS]; /* VLAN filters table. */
+ /* Device properties. */
+ uint16_t mtu; /* Configured MTU. */
+ uint8_t port; /* Physical port number. */
+ unsigned int started:1; /* Device started, flows enabled. */
+ unsigned int promisc:1; /* Device in promiscuous mode. */
+ unsigned int promisc_ok:1; /* Promiscuous flow is supported. */
+ unsigned int allmulti:1; /* Device receives all multicast packets. */
+ unsigned int hw_qpg:1; /* QP groups are supported. */
+ unsigned int hw_tss:1; /* TSS is supported. */
+ unsigned int hw_rss:1; /* RSS is supported. */
+ unsigned int rss:1; /* RSS is enabled. */
+ unsigned int vf:1; /* This is a VF device. */
+#ifdef INLINE_RECV
+ unsigned int inl_recv_size; /* Inline recv size */
+#endif
+ unsigned int max_rss_tbl_sz; /* Maximum number of RSS queues. */
+ /* RX/TX queues. */
+ struct rxq rxq_parent; /* Parent queue when RSS is enabled. */
+ unsigned int rxqs_n; /* RX queues array size. */
+ unsigned int txqs_n; /* TX queues array size. */
+ struct rxq *(*rxqs)[]; /* RX queues. */
+ struct txq *(*txqs)[]; /* TX queues. */
+ rte_spinlock_t lock; /* Lock for control functions. */
+};
+
+/**
+ * Lock private structure to protect it from concurrent access in the
+ * control path.
+ *
+ * @param priv
+ * Pointer to private structure.
+ */
+static void
+priv_lock(struct priv *priv)
+{
+ rte_spinlock_lock(&priv->lock);
+}
+
+/**
+ * Unlock private structure.
+ *
+ * @param priv
+ * Pointer to private structure.
+ */
+static void
+priv_unlock(struct priv *priv)
+{
+ rte_spinlock_unlock(&priv->lock);
+}
+
+/* Allocate a buffer on the stack and fill it with a printf format string. */
+#define MKSTR(name, ...) \
+ char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
+ \
+ snprintf(name, sizeof(name), __VA_ARGS__)
+
+/**
+ * Get interface name from private structure.
+ *
+ * @param[in] priv
+ * Pointer to private structure.
+ * @param[out] ifname
+ * Interface name output buffer.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
+{
+ int ret = -1;
+ DIR *dir;
+ struct dirent *dent;
+
+ {
+ MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
+
+ dir = opendir(path);
+ if (dir == NULL)
+ return -1;
+ }
+ while ((dent = readdir(dir)) != NULL) {
+ char *name = dent->d_name;
+ FILE *file;
+ unsigned int dev_id;
+ int r;
+
+ if ((name[0] == '.') &&
+ ((name[1] == '\0') ||
+ ((name[1] == '.') && (name[2] == '\0'))))
+ continue;
+
+ MKSTR(path, "%s/device/net/%s/dev_id",
+ priv->ctx->device->ibdev_path, name);
+
+ file = fopen(path, "rb");
+ if (file == NULL)
+ continue;
+ r = fscanf(file, "%x", &dev_id);
+ fclose(file);
+ if ((r == 1) && (dev_id == (priv->port - 1u))) {
+ snprintf(*ifname, sizeof(*ifname), "%s", name);
+ ret = 0;
+ break;
+ }
+ }
+ closedir(dir);
+ return ret;
+}
+
+/**
+ * Read from sysfs entry.
+ *
+ * @param[in] priv
+ * Pointer to private structure.
+ * @param[in] entry
+ * Entry name relative to sysfs path.
+ * @param[out] buf
+ * Data output buffer.
+ * @param size
+ * Buffer size.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_sysfs_read(const struct priv *priv, const char *entry,
+ char *buf, size_t size)
+{
+ char ifname[IF_NAMESIZE];
+ FILE *file;
+ int ret;
+ int err;
+
+ if (priv_get_ifname(priv, &ifname))
+ return -1;
+
+ MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
+ ifname, entry);
+
+ file = fopen(path, "rb");
+ if (file == NULL)
+ return -1;
+ ret = fread(buf, 1, size, file);
+ err = errno;
+ if (((size_t)ret < size) && (ferror(file)))
+ ret = -1;
+ else
+ ret = size;
+ fclose(file);
+ errno = err;
+ return ret;
+}
+
+/**
+ * Write to sysfs entry.
+ *
+ * @param[in] priv
+ * Pointer to private structure.
+ * @param[in] entry
+ * Entry name relative to sysfs path.
+ * @param[in] buf
+ * Data buffer.
+ * @param size
+ * Buffer size.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_sysfs_write(const struct priv *priv, const char *entry,
+ char *buf, size_t size)
+{
+ char ifname[IF_NAMESIZE];
+ FILE *file;
+ int ret;
+ int err;
+
+ if (priv_get_ifname(priv, &ifname))
+ return -1;
+
+ MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
+ ifname, entry);
+
+ file = fopen(path, "wb");
+ if (file == NULL)
+ return -1;
+ ret = fwrite(buf, 1, size, file);
+ err = errno;
+ if (((size_t)ret < size) || (ferror(file)))
+ ret = -1;
+ else
+ ret = size;
+ fclose(file);
+ errno = err;
+ return ret;
+}
+
+/**
+ * Get unsigned long sysfs property.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param[in] name
+ * Entry name relative to sysfs path.
+ * @param[out] value
+ * Value output buffer.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
+{
+ int ret;
+ unsigned long value_ret;
+ char value_str[32];
+
+ ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
+ if (ret == -1) {
+ DEBUG("cannot read %s value from sysfs: %s",
+ name, strerror(errno));
+ return -1;
+ }
+ value_str[ret] = '\0';
+ errno = 0;
+ value_ret = strtoul(value_str, NULL, 0);
+ if (errno) {
+ DEBUG("invalid %s value `%s': %s", name, value_str,
+ strerror(errno));
+ return -1;
+ }
+ *value = value_ret;
+ return 0;
+}
+
+/**
+ * Set unsigned long sysfs property.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param[in] name
+ * Entry name relative to sysfs path.
+ * @param value
+ * Value to set.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
+{
+ int ret;
+ MKSTR(value_str, "%lu", value);
+
+ ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
+ if (ret == -1) {
+ DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
+ name, value_str, value, strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+/**
+ * Perform ifreq ioctl() on associated Ethernet device.
+ *
+ * @param[in] priv
+ * Pointer to private structure.
+ * @param req
+ * Request number to pass to ioctl().
+ * @param[out] ifr
+ * Interface request structure output buffer.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
+{
+ int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+ int ret = -1;
+
+ if (sock == -1)
+ return ret;
+ if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
+ ret = ioctl(sock, req, ifr);
+ close(sock);
+ return ret;
+}
+
+/**
+ * Get device MTU.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param[out] mtu
+ * MTU value output buffer.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_get_mtu(struct priv *priv, uint16_t *mtu)
+{
+ unsigned long ulong_mtu;
+
+ if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
+ return -1;
+ *mtu = ulong_mtu;
+ return 0;
+}
+
+/**
+ * Set device MTU.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param mtu
+ * MTU value to set.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_set_mtu(struct priv *priv, uint16_t mtu)
+{
+ return priv_set_sysfs_ulong(priv, "mtu", mtu);
+}
+
+/**
+ * Set device flags.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param keep
+ * Bitmask for flags that must remain untouched.
+ * @param flags
+ * Bitmask for flags to modify.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
+{
+ unsigned long tmp;
+
+ if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
+ return -1;
+ tmp &= keep;
+ tmp |= flags;
+ return priv_set_sysfs_ulong(priv, "flags", tmp);
+}
+
+/* Device configuration. */
+
+static int
+rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
+ unsigned int socket, const struct rte_eth_rxconf *conf,
+ struct rte_mempool *mp);
+
+static void
+rxq_cleanup(struct rxq *rxq);
+
+/**
+ * Ethernet device configuration.
+ *
+ * Prepare the driver for a given number of TX and RX queues.
+ * Allocate parent RSS queue when several RX queues are requested.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+dev_configure(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int rxqs_n = dev->data->nb_rx_queues;
+ unsigned int txqs_n = dev->data->nb_tx_queues;
+ unsigned int tmp;
+ int ret;
+
+ priv->rxqs = (void *)dev->data->rx_queues;
+ priv->txqs = (void *)dev->data->tx_queues;
+ if (txqs_n != priv->txqs_n) {
+ INFO("%p: TX queues number update: %u -> %u",
+ (void *)dev, priv->txqs_n, txqs_n);
+ priv->txqs_n = txqs_n;
+ }
+ if (rxqs_n == priv->rxqs_n)
+ return 0;
+ INFO("%p: RX queues number update: %u -> %u",
+ (void *)dev, priv->rxqs_n, rxqs_n);
+ /* If RSS is enabled, disable it first. */
+ if (priv->rss) {
+ unsigned int i;
+
+ /* Only if there are no remaining child RX queues. */
+ for (i = 0; (i != priv->rxqs_n); ++i)
+ if ((*priv->rxqs)[i] != NULL)
+ return EINVAL;
+ rxq_cleanup(&priv->rxq_parent);
+ priv->rss = 0;
+ priv->rxqs_n = 0;
+ }
+ if (rxqs_n <= 1) {
+ /* Nothing else to do. */
+ priv->rxqs_n = rxqs_n;
+ return 0;
+ }
+ /* Allocate a new RSS parent queue if supported by hardware. */
+ if (!priv->hw_rss) {
+ ERROR("%p: only a single RX queue can be configured when"
+ " hardware doesn't support RSS",
+ (void *)dev);
+ return EINVAL;
+ }
+ /* Fail if hardware doesn't support that many RSS queues. */
+ if (rxqs_n >= priv->max_rss_tbl_sz) {
+ ERROR("%p: only %u RX queues can be configured for RSS",
+ (void *)dev, priv->max_rss_tbl_sz);
+ return EINVAL;
+ }
+ priv->rss = 1;
+ tmp = priv->rxqs_n;
+ priv->rxqs_n = rxqs_n;
+ ret = rxq_setup(dev, &priv->rxq_parent, 0, 0, NULL, NULL);
+ if (!ret)
+ return 0;
+ /* Failure, rollback. */
+ priv->rss = 0;
+ priv->rxqs_n = tmp;
+ assert(ret > 0);
+ return ret;
+}
+
+/**
+ * DPDK callback for Ethernet device configuration.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_dev_configure(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ int ret;
+
+ priv_lock(priv);
+ ret = dev_configure(dev);
+ assert(ret >= 0);
+ priv_unlock(priv);
+ return -ret;
+}
+
+/* TX queues handling. */
+
+/**
+ * Allocate TX queue elements.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param elts_n
+ * Number of elements to allocate.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+txq_alloc_elts(struct txq *txq, unsigned int elts_n)
+{
+ unsigned int i;
+ struct txq_elt (*elts)[elts_n] =
+ rte_calloc_socket("TXQ", 1, sizeof(*elts), 0, txq->socket);
+ linear_t (*elts_linear)[elts_n] =
+ rte_calloc_socket("TXQ", 1, sizeof(*elts_linear), 0,
+ txq->socket);
+ struct ibv_mr *mr_linear = NULL;
+ int ret = 0;
+
+ if ((elts == NULL) || (elts_linear == NULL)) {
+ ERROR("%p: can't allocate packets array", (void *)txq);
+ ret = ENOMEM;
+ goto error;
+ }
+ mr_linear =
+ ibv_reg_mr(txq->priv->pd, elts_linear, sizeof(*elts_linear),
+ (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
+ if (mr_linear == NULL) {
+ ERROR("%p: unable to configure MR, ibv_reg_mr() failed",
+ (void *)txq);
+ ret = EINVAL;
+ goto error;
+ }
+ for (i = 0; (i != elts_n); ++i) {
+ struct txq_elt *elt = &(*elts)[i];
+ mlx4_send_wr_t *wr = &elt->wr;
+
+ /* Configure WR. */
+ WR_ID(wr->wr_id).id = i;
+ WR_ID(wr->wr_id).offset = 0;
+ wr->sg_list = &elt->sges[0];
+ wr->opcode = IBV_WR_SEND;
+ /* Other fields are updated during TX. */
+ }
+ DEBUG("%p: allocated and configured %u WRs", (void *)txq, elts_n);
+ txq->elts_n = elts_n;
+ txq->elts = elts;
+ txq->elts_head = 0;
+ txq->elts_tail = 0;
+ txq->elts_comp = 0;
+ txq->elts_linear = elts_linear;
+ txq->mr_linear = mr_linear;
+ assert(ret == 0);
+ return 0;
+error:
+ if (mr_linear != NULL)
+ claim_zero(ibv_dereg_mr(mr_linear));
+
+ rte_free(elts_linear);
+ rte_free(elts);
+
+ DEBUG("%p: failed, freed everything", (void *)txq);
+ assert(ret > 0);
+ return ret;
+}
+
+/**
+ * Free TX queue elements.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ */
+static void
+txq_free_elts(struct txq *txq)
+{
+ unsigned int i;
+ unsigned int elts_n = txq->elts_n;
+ struct txq_elt (*elts)[elts_n] = txq->elts;
+ linear_t (*elts_linear)[elts_n] = txq->elts_linear;
+ struct ibv_mr *mr_linear = txq->mr_linear;
+
+ DEBUG("%p: freeing WRs", (void *)txq);
+ txq->elts_n = 0;
+ txq->elts = NULL;
+ txq->elts_linear = NULL;
+ txq->mr_linear = NULL;
+ if (mr_linear != NULL)
+ claim_zero(ibv_dereg_mr(mr_linear));
+
+ rte_free(elts_linear);
+ if (elts == NULL)
+ return;
+ for (i = 0; (i != elemof(*elts)); ++i) {
+ struct txq_elt *elt = &(*elts)[i];
+
+ if (WR_ID(elt->wr.wr_id).offset == 0)
+ continue;
+ rte_pktmbuf_free((void *)(elt->sges[0].addr -
+ WR_ID(elt->wr.wr_id).offset));
+ }
+ rte_free(elts);
+}
+
+
+/**
+ * Clean up a TX queue.
+ *
+ * Destroy objects, free allocated memory and reset the structure for reuse.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ */
+static void
+txq_cleanup(struct txq *txq)
+{
+ size_t i;
+
+ DEBUG("cleaning up %p", (void *)txq);
+ txq_free_elts(txq);
+ if (txq->qp != NULL)
+ claim_zero(ibv_destroy_qp(txq->qp));
+ if (txq->cq != NULL)
+ claim_zero(ibv_destroy_cq(txq->cq));
+ for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
+ if (txq->mp2mr[i].mp == NULL)
+ break;
+ assert(txq->mp2mr[i].mr != NULL);
+ claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
+ }
+ memset(txq, 0, sizeof(*txq));
+}
+
+/**
+ * Manage TX completions.
+ *
+ * When sending a burst, mlx4_tx_burst() posts several WRs.
+ * To improve performance, a completion event is only required for the last of
+ * them. Doing so discards completion information for other WRs, but this
+ * information would not be used anyway.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ *
+ * @return
+ * 0 on success, -1 on failure.
+ */
+static int
+txq_complete(struct txq *txq)
+{
+ unsigned int elts_comp = txq->elts_comp;
+ unsigned int elts_tail;
+ const unsigned int elts_n = txq->elts_n;
+ struct ibv_wc wcs[elts_comp];
+ int wcs_n;
+
+ if (unlikely(elts_comp == 0))
+ return 0;
+#ifdef DEBUG_SEND
+ DEBUG("%p: processing %u work requests completions",
+ (void *)txq, elts_comp);
+#endif
+ wcs_n = ibv_poll_cq(txq->cq, elts_comp, wcs);
+ if (unlikely(wcs_n == 0))
+ return 0;
+ if (unlikely(wcs_n < 0)) {
+ DEBUG("%p: ibv_poll_cq() failed (wcs_n=%d)",
+ (void *)txq, wcs_n);
+ return -1;
+ }
+ elts_comp -= wcs_n;
+ assert(elts_comp <= txq->elts_comp);
+ /*
+ * Work Completion ID contains the associated element index in
+ * (*txq->elts)[]. Since WCs are returned in order, we only need to
+ * look at the last WC to clear older Work Requests.
+ *
+ * Assume WC status is successful as nothing can be done about it
+ * anyway.
+ */
+ elts_tail = WR_ID(wcs[wcs_n - 1].wr_id).id;
+ /* Consume the last WC. */
+ if (++elts_tail >= elts_n)
+ elts_tail = 0;
+ txq->elts_tail = elts_tail;
+ txq->elts_comp = elts_comp;
+ return 0;
+}
+
+/**
+ * Get Memory Region (MR) <-> Memory Pool (MP) association from txq->mp2mr[].
+ * Add MP to txq->mp2mr[] if it's not registered yet. If mp2mr[] is full,
+ * remove an entry first.
+ *
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param[in] mp
+ * Memory Pool for which a Memory Region lkey must be returned.
+ *
+ * @return
+ * mr->lkey on success, (uint32_t)-1 on failure.
+ */
+static uint32_t
+txq_mp2mr(struct txq *txq, struct rte_mempool *mp)
+{
+ unsigned int i;
+ struct ibv_mr *mr;
+
+ for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
+ if (unlikely(txq->mp2mr[i].mp == NULL)) {
+ /* Unknown MP, add a new MR for it. */
+ break;
+ }
+ if (txq->mp2mr[i].mp == mp) {
+ assert(txq->mp2mr[i].lkey != (uint32_t)-1);
+ assert(txq->mp2mr[i].mr->lkey == txq->mp2mr[i].lkey);
+ return txq->mp2mr[i].lkey;
+ }
+ }
+ /* Add a new entry, register MR first. */
+ DEBUG("%p: discovered new memory pool %p", (void *)txq, (void *)mp);
+ mr = ibv_reg_mr(txq->priv->pd,
+ (void *)mp->elt_va_start,
+ (mp->elt_va_end - mp->elt_va_start),
+ (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
+ if (unlikely(mr == NULL)) {
+ DEBUG("%p: unable to configure MR, ibv_reg_mr() failed.",
+ (void *)txq);
+ return (uint32_t)-1;
+ }
+ if (unlikely(i == elemof(txq->mp2mr))) {
+ /* Table is full, remove oldest entry. */
+ DEBUG("%p: MR <-> MP table full, dropping oldest entry.",
+ (void *)txq);
+ --i;
+ claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
+ memmove(&txq->mp2mr[0], &txq->mp2mr[1],
+ (sizeof(txq->mp2mr) - sizeof(txq->mp2mr[0])));
+ }
+ /* Store the new entry. */
+ txq->mp2mr[i].mp = mp;
+ txq->mp2mr[i].mr = mr;
+ txq->mp2mr[i].lkey = mr->lkey;
+ DEBUG("%p: new MR lkey for MP %p: 0x%08" PRIu32,
+ (void *)txq, (void *)mp, txq->mp2mr[i].lkey);
+ return txq->mp2mr[i].lkey;
+}
+
+/**
+ * Copy scattered mbuf contents to a single linear buffer.
+ *
+ * @param[out] linear
+ * Linear output buffer.
+ * @param[in] buf
+ * Scattered input buffer.
+ *
+ * @return
+ * Number of bytes copied to the output buffer or 0 if not large enough.
+ */
+static unsigned int
+linearize_mbuf(linear_t *linear, struct rte_mbuf *buf)
+{
+ unsigned int size = 0;
+ unsigned int offset;
+
+ do {
+ unsigned int len = DATA_LEN(buf);
+
+ offset = size;
+ size += len;
+ if (unlikely(size > sizeof(*linear)))
+ return 0;
+ memcpy(&(*linear)[offset],
+ rte_pktmbuf_mtod(buf, uint8_t *),
+ len);
+ buf = NEXT(buf);
+ } while (buf != NULL);
+ return size;
+}
+
+/**
+ * DPDK callback for TX.
+ *
+ * @param dpdk_txq
+ * Generic pointer to TX queue structure.
+ * @param[in] pkts
+ * Packets to transmit.
+ * @param pkts_n
+ * Number of packets in array.
+ *
+ * @return
+ * Number of packets successfully transmitted (<= pkts_n).
+ */
+static uint16_t
+mlx4_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+{
+ struct txq *txq = (struct txq *)dpdk_txq;
+ mlx4_send_wr_t head;
+ mlx4_send_wr_t **wr_next = &head.next;
+ mlx4_send_wr_t *bad_wr;
+ unsigned int elts_head = txq->elts_head;
+ const unsigned int elts_tail = txq->elts_tail;
+ const unsigned int elts_n = txq->elts_n;
+ unsigned int i;
+ unsigned int max;
+ int err;
+
+ txq_complete(txq);
+ max = (elts_n - (elts_head - elts_tail));
+ if (max > elts_n)
+ max -= elts_n;
+ assert(max >= 1);
+ assert(max <= elts_n);
+ /* Always leave one free entry in the ring. */
+ --max;
+ if (max == 0)
+ return 0;
+ if (max > pkts_n)
+ max = pkts_n;
+ for (i = 0; (i != max); ++i) {
+ struct rte_mbuf *buf = pkts[i];
+ struct txq_elt *elt = &(*txq->elts)[elts_head];
+ mlx4_send_wr_t *wr = &elt->wr;
+ unsigned int segs = NB_SEGS(buf);
+#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
+ unsigned int sent_size = 0;
+#endif
+ unsigned int j;
+ int linearize = 0;
+
+ /* Clean up old buffer. */
+ if (likely(WR_ID(wr->wr_id).offset != 0)) {
+ struct rte_mbuf *tmp = (void *)
+ (elt->sges[0].addr - WR_ID(wr->wr_id).offset);
+
+ /* Faster than rte_pktmbuf_free(). */
+ do {
+ struct rte_mbuf *next = NEXT(tmp);
+
+ rte_pktmbuf_free_seg(tmp);
+ tmp = next;
+ } while (tmp != NULL);
+ }
+#ifndef NDEBUG
+ /* For assert(). */
+ WR_ID(wr->wr_id).offset = 0;
+ for (j = 0; ((int)j < wr->num_sge); ++j) {
+ elt->sges[j].addr = 0;
+ elt->sges[j].length = 0;
+ elt->sges[j].lkey = 0;
+ }
+ wr->next = NULL;
+ wr->num_sge = 0;
+#endif
+ /* Sanity checks, most of which are only relevant with
+ * debugging enabled. */
+ assert(WR_ID(wr->wr_id).id == elts_head);
+ assert(WR_ID(wr->wr_id).offset == 0);
+ assert(wr->next == NULL);
+ assert(wr->sg_list == &elt->sges[0]);
+ assert(wr->num_sge == 0);
+ assert(wr->opcode == IBV_WR_SEND);
+ /* When there are too many segments, extra segments are
+ * linearized in the last SGE. */
+ if (unlikely(segs > elemof(elt->sges))) {
+ segs = (elemof(elt->sges) - 1);
+ linearize = 1;
+ }
+ /* Set WR fields. */
+ assert(((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
+ (uintptr_t)buf) <= 0xffff);
+ WR_ID(wr->wr_id).offset =
+ ((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
+ (uintptr_t)buf);
+ wr->num_sge = segs;
+ /* Register segments as SGEs. */
+ for (j = 0; (j != segs); ++j) {
+ struct ibv_sge *sge = &elt->sges[j];
+ uint32_t lkey;
+
+ /* Retrieve Memory Region key for this memory pool. */
+ lkey = txq_mp2mr(txq, buf->pool);
+ if (unlikely(lkey == (uint32_t)-1)) {
+ /* MR does not exist. */
+ DEBUG("%p: unable to get MP <-> MR"
+ " association", (void *)txq);
+ /* Clean up TX element. */
+ WR_ID(elt->wr.wr_id).offset = 0;
+#ifndef NDEBUG
+ /* For assert(). */
+ while (j) {
+ --j;
+ --sge;
+ sge->addr = 0;
+ sge->length = 0;
+ sge->lkey = 0;
+ }
+ wr->num_sge = 0;
+#endif
+ goto stop;
+ }
+ /* Sanity checks, only relevant with debugging
+ * enabled. */
+ assert(sge->addr == 0);
+ assert(sge->length == 0);
+ assert(sge->lkey == 0);
+ /* Update SGE. */
+ sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf, char *);
+ if (txq->priv->vf)
+ rte_prefetch0((volatile void *)sge->addr);
+ sge->length = DATA_LEN(buf);
+ sge->lkey = lkey;
+#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
+ sent_size += sge->length;
+#endif
+ buf = NEXT(buf);
+ }
+ /* If buf is not NULL here and is not going to be linearized,
+ * nb_segs is not valid. */
+ assert(j == segs);
+ assert((buf == NULL) || (linearize));
+ /* Linearize extra segments. */
+ if (linearize) {
+ struct ibv_sge *sge = &elt->sges[segs];
+ linear_t *linear = &(*txq->elts_linear)[elts_head];
+ unsigned int size = linearize_mbuf(linear, buf);
+
+ assert(segs == (elemof(elt->sges) - 1));
+ if (size == 0) {
+ /* Invalid packet. */
+ DEBUG("%p: packet too large to be linearized.",
+ (void *)txq);
+ /* Clean up TX element. */
+ WR_ID(elt->wr.wr_id).offset = 0;
+#ifndef NDEBUG
+ /* For assert(). */
+ while (j) {
+ --j;
+ --sge;
+ sge->addr = 0;
+ sge->length = 0;
+ sge->lkey = 0;
+ }
+ wr->num_sge = 0;
+#endif
+ goto stop;
+ }
+ /* If MLX4_PMD_SGE_WR_N is 1, free mbuf immediately
+ * and clear offset from WR ID. */
+ if (elemof(elt->sges) == 1) {
+ do {
+ struct rte_mbuf *next = NEXT(buf);
+
+ rte_pktmbuf_free_seg(buf);
+ buf = next;
+ } while (buf != NULL);
+ WR_ID(wr->wr_id).offset = 0;
+ }
+ /* Set WR fields and fill SGE with linear buffer. */
+ ++wr->num_sge;
+ /* Sanity checks, only relevant with debugging
+ * enabled. */
+ assert(sge->addr == 0);
+ assert(sge->length == 0);
+ assert(sge->lkey == 0);
+ /* Update SGE. */
+ sge->addr = (uintptr_t)&(*linear)[0];
+ sge->length = size;
+ sge->lkey = txq->mr_linear->lkey;
+#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
+ sent_size += size;
+#endif
+ }
+ /* Link WRs together for ibv_post_send(). */
+ *wr_next = wr;
+ wr_next = &wr->next;
+#if MLX4_PMD_MAX_INLINE > 0
+ if (sent_size <= txq->max_inline)
+ wr->send_flags = IBV_SEND_INLINE;
+ else
+#endif
+ wr->send_flags = 0;
+ if (++elts_head >= elts_n)
+ elts_head = 0;
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increment sent bytes counter. */
+ txq->stats.obytes += sent_size;
+#endif
+ }
+stop:
+ /* Take a shortcut if nothing must be sent. */
+ if (unlikely(i == 0))
+ return 0;
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increment sent packets counter. */
+ txq->stats.opackets += i;
+#endif
+ *wr_next = NULL;
+ /* The last WR is the only one asking for a completion event. */
+ containerof(wr_next, mlx4_send_wr_t, next)->
+ send_flags |= IBV_SEND_SIGNALED;
+ err = mlx4_post_send(txq->qp, head.next, &bad_wr);
+ if (unlikely(err)) {
+ unsigned int unsent = 0;
+
+ /* An error occurred, completion event is lost. Fix counters. */
+ while (bad_wr != NULL) {
+ struct txq_elt *elt =
+ containerof(bad_wr, struct txq_elt, wr);
+ mlx4_send_wr_t *wr = &elt->wr;
+ mlx4_send_wr_t *next = wr->next;
+#if defined(MLX4_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
+ unsigned int j;
+#endif
+
+ assert(wr == bad_wr);
+ /* Clean up TX element without freeing it, caller
+ * should take care of this. */
+ WR_ID(elt->wr.wr_id).offset = 0;
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ for (j = 0; ((int)j < wr->num_sge); ++j)
+ txq->stats.obytes -= wr->sg_list[j].length;
+#endif
+ ++unsent;
+#ifndef NDEBUG
+ /* For assert(). */
+ for (j = 0; ((int)j < wr->num_sge); ++j) {
+ elt->sges[j].addr = 0;
+ elt->sges[j].length = 0;
+ elt->sges[j].lkey = 0;
+ }
+ wr->next = NULL;
+ wr->num_sge = 0;
+#endif
+ bad_wr = next;
+ }
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ txq->stats.opackets -= unsent;
+#endif
+ assert(i >= unsent);
+ i -= unsent;
+ /* "Unsend" remaining packets. */
+ elts_head -= unsent;
+ if (elts_head >= elts_n)
+ elts_head += elts_n;
+ assert(elts_head < elts_n);
+ DEBUG("%p: mlx4_post_send() failed, %u unprocessed WRs: %s",
+ (void *)txq, unsent,
+ ((err <= -1) ? "Internal error" : strerror(err)));
+ } else
+ ++txq->elts_comp;
+ txq->elts_head = elts_head;
+ return i;
+}
+
+/**
+ * Configure a TX queue.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param txq
+ * Pointer to TX queue structure.
+ * @param desc
+ * Number of descriptors to configure in queue.
+ * @param socket
+ * NUMA socket on which memory must be allocated.
+ * @param[in] conf
+ * Thresholds parameters.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
+ unsigned int socket, const struct rte_eth_txconf *conf)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct txq tmpl = {
+ .priv = priv,
+ .socket = socket
+ };
+ union {
+ struct ibv_qp_init_attr init;
+ struct ibv_exp_qp_attr mod;
+ } attr;
+ int ret = 0;
+
+ (void)conf; /* Thresholds configuration (ignored). */
+ if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
+ ERROR("%p: invalid number of TX descriptors (must be a"
+ " multiple of %d)", (void *)dev, desc);
+ return EINVAL;
+ }
+ desc /= MLX4_PMD_SGE_WR_N;
+ /* MRs will be registered in mp2mr[] later. */
+ tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
+ if (tmpl.cq == NULL) {
+ ret = ENOMEM;
+ ERROR("%p: CQ creation failure: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ DEBUG("priv->device_attr.max_qp_wr is %d",
+ priv->device_attr.max_qp_wr);
+ DEBUG("priv->device_attr.max_sge is %d",
+ priv->device_attr.max_sge);
+ attr.init = (struct ibv_qp_init_attr){
+ /* CQ to be associated with the send queue. */
+ .send_cq = tmpl.cq,
+ /* CQ to be associated with the receive queue. */
+ .recv_cq = tmpl.cq,
+ .cap = {
+ /* Max number of outstanding WRs. */
+ .max_send_wr = ((priv->device_attr.max_qp_wr < desc) ?
+ priv->device_attr.max_qp_wr :
+ desc),
+ /* Max number of scatter/gather elements in a WR. */
+ .max_send_sge = ((priv->device_attr.max_sge <
+ MLX4_PMD_SGE_WR_N) ?
+ priv->device_attr.max_sge :
+ MLX4_PMD_SGE_WR_N),
+#if MLX4_PMD_MAX_INLINE > 0
+ .max_inline_data = MLX4_PMD_MAX_INLINE,
+#endif
+ },
+ .qp_type = IBV_QPT_RAW_PACKET,
+ /* Do *NOT* enable this, completions events are managed per
+ * TX burst. */
+ .sq_sig_all = 0
+ };
+ tmpl.qp = ibv_create_qp(priv->pd, &attr.init);
+ if (tmpl.qp == NULL) {
+ ret = (errno ? errno : EINVAL);
+ ERROR("%p: QP creation failure: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+#if MLX4_PMD_MAX_INLINE > 0
+ /* ibv_create_qp() updates this value. */
+ tmpl.max_inline = attr.init.cap.max_inline_data;
+#endif
+ attr.mod = (struct ibv_exp_qp_attr){
+ /* Move the QP to this state. */
+ .qp_state = IBV_QPS_INIT,
+ /* Primary port number. */
+ .port_num = priv->port
+ };
+ ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod,
+ (IBV_EXP_QP_STATE | IBV_EXP_QP_PORT));
+ if (ret) {
+ ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ ret = txq_alloc_elts(&tmpl, desc);
+ if (ret) {
+ ERROR("%p: TXQ allocation failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ attr.mod = (struct ibv_exp_qp_attr){
+ .qp_state = IBV_QPS_RTR
+ };
+ ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
+ if (ret) {
+ ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ attr.mod.qp_state = IBV_QPS_RTS;
+ ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
+ if (ret) {
+ ERROR("%p: QP state to IBV_QPS_RTS failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ /* Clean up txq in case we're reinitializing it. */
+ DEBUG("%p: cleaning-up old txq just in case", (void *)txq);
+ txq_cleanup(txq);
+ *txq = tmpl;
+ DEBUG("%p: txq updated with %p", (void *)txq, (void *)&tmpl);
+ assert(ret == 0);
+ return 0;
+error:
+ txq_cleanup(&tmpl);
+ assert(ret > 0);
+ return ret;
+}
+
+/**
+ * DPDK callback to configure a TX queue.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param idx
+ * TX queue index.
+ * @param desc
+ * Number of descriptors to configure in queue.
+ * @param socket
+ * NUMA socket on which memory must be allocated.
+ * @param[in] conf
+ * Thresholds parameters.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
+ unsigned int socket, const struct rte_eth_txconf *conf)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct txq *txq = (*priv->txqs)[idx];
+ int ret;
+
+ priv_lock(priv);
+ DEBUG("%p: configuring queue %u for %u descriptors",
+ (void *)dev, idx, desc);
+ if (idx >= priv->txqs_n) {
+ ERROR("%p: queue index out of range (%u >= %u)",
+ (void *)dev, idx, priv->txqs_n);
+ priv_unlock(priv);
+ return -EOVERFLOW;
+ }
+ if (txq != NULL) {
+ DEBUG("%p: reusing already allocated queue index %u (%p)",
+ (void *)dev, idx, (void *)txq);
+ if (priv->started) {
+ priv_unlock(priv);
+ return -EEXIST;
+ }
+ (*priv->txqs)[idx] = NULL;
+ txq_cleanup(txq);
+ } else {
+ txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0, socket);
+ if (txq == NULL) {
+ ERROR("%p: unable to allocate queue index %u",
+ (void *)dev, idx);
+ priv_unlock(priv);
+ return -ENOMEM;
+ }
+ }
+ ret = txq_setup(dev, txq, desc, socket, conf);
+ if (ret)
+ rte_free(txq);
+ else {
+ txq->stats.idx = idx;
+ DEBUG("%p: adding TX queue %p to list",
+ (void *)dev, (void *)txq);
+ (*priv->txqs)[idx] = txq;
+ /* Update send callback. */
+ dev->tx_pkt_burst = mlx4_tx_burst;
+ }
+ priv_unlock(priv);
+ return -ret;
+}
+
+/**
+ * DPDK callback to release a TX queue.
+ *
+ * @param dpdk_txq
+ * Generic TX queue pointer.
+ */
+static void
+mlx4_tx_queue_release(void *dpdk_txq)
+{
+ struct txq *txq = (struct txq *)dpdk_txq;
+ struct priv *priv;
+ unsigned int i;
+
+ if (txq == NULL)
+ return;
+ priv = txq->priv;
+ priv_lock(priv);
+ for (i = 0; (i != priv->txqs_n); ++i)
+ if ((*priv->txqs)[i] == txq) {
+ DEBUG("%p: removing TX queue %p from list",
+ (void *)priv->dev, (void *)txq);
+ (*priv->txqs)[i] = NULL;
+ break;
+ }
+ txq_cleanup(txq);
+ rte_free(txq);
+ priv_unlock(priv);
+}
+
+/* RX queues handling. */
+
+/**
+ * Allocate RX queue elements with scattered packets support.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ * @param elts_n
+ * Number of elements to allocate.
+ * @param[in] pool
+ * If not NULL, fetch buffers from this array instead of allocating them
+ * with rte_pktmbuf_alloc().
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_alloc_elts_sp(struct rxq *rxq, unsigned int elts_n,
+ struct rte_mbuf **pool)
+{
+ unsigned int i;
+ struct rxq_elt_sp (*elts)[elts_n] =
+ rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
+ rxq->socket);
+ int ret = 0;
+
+ if (elts == NULL) {
+ ERROR("%p: can't allocate packets array", (void *)rxq);
+ ret = ENOMEM;
+ goto error;
+ }
+ /* For each WR (packet). */
+ for (i = 0; (i != elts_n); ++i) {
+ unsigned int j;
+ struct rxq_elt_sp *elt = &(*elts)[i];
+ struct ibv_recv_wr *wr = &elt->wr;
+ struct ibv_sge (*sges)[(elemof(elt->sges))] = &elt->sges;
+
+ /* These two arrays must have the same size. */
+ assert(elemof(elt->sges) == elemof(elt->bufs));
+ /* Configure WR. */
+ wr->wr_id = i;
+ wr->next = &(*elts)[(i + 1)].wr;
+ wr->sg_list = &(*sges)[0];
+ wr->num_sge = elemof(*sges);
+ /* For each SGE (segment). */
+ for (j = 0; (j != elemof(elt->bufs)); ++j) {
+ struct ibv_sge *sge = &(*sges)[j];
+ struct rte_mbuf *buf;
+
+ if (pool != NULL) {
+ buf = *(pool++);
+ assert(buf != NULL);
+ rte_pktmbuf_reset(buf);
+ } else
+ buf = rte_pktmbuf_alloc(rxq->mp);
+ if (buf == NULL) {
+ assert(pool == NULL);
+ ERROR("%p: empty mbuf pool", (void *)rxq);
+ ret = ENOMEM;
+ goto error;
+ }
+ elt->bufs[j] = buf;
+ /* Headroom is reserved by rte_pktmbuf_alloc(). */
+ assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
+ /* Buffer is supposed to be empty. */
+ assert(rte_pktmbuf_data_len(buf) == 0);
+ assert(rte_pktmbuf_pkt_len(buf) == 0);
+ /* sge->addr must be able to store a pointer. */
+ assert(sizeof(sge->addr) >= sizeof(uintptr_t));
+ if (j == 0) {
+ /* The first SGE keeps its headroom. */
+ sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf,
+ char *);
+ sge->length = (buf->buf_len -
+ RTE_PKTMBUF_HEADROOM);
+ } else {
+ /* Subsequent SGEs lose theirs. */
+ assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
+ SET_DATA_OFF(buf, 0);
+ sge->addr = (uintptr_t)buf->buf_addr;
+ sge->length = buf->buf_len;
+ }
+ sge->lkey = rxq->mr->lkey;
+ /* Redundant check for tailroom. */
+ assert(sge->length == rte_pktmbuf_tailroom(buf));
+ }
+ }
+ /* The last WR pointer must be NULL. */
+ (*elts)[(i - 1)].wr.next = NULL;
+ DEBUG("%p: allocated and configured %u WRs (%zu segments)",
+ (void *)rxq, elts_n, (elts_n * elemof((*elts)[0].sges)));
+ rxq->elts_n = elts_n;
+ rxq->elts.sp = elts;
+ assert(ret == 0);
+ return 0;
+error:
+ if (elts != NULL) {
+ assert(pool == NULL);
+ for (i = 0; (i != elemof(*elts)); ++i) {
+ unsigned int j;
+ struct rxq_elt_sp *elt = &(*elts)[i];
+
+ for (j = 0; (j != elemof(elt->bufs)); ++j) {
+ struct rte_mbuf *buf = elt->bufs[j];
+
+ if (buf != NULL)
+ rte_pktmbuf_free_seg(buf);
+ }
+ }
+ rte_free(elts);
+ }
+ DEBUG("%p: failed, freed everything", (void *)rxq);
+ assert(ret > 0);
+ return ret;
+}
+
+/**
+ * Free RX queue elements with scattered packets support.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ */
+static void
+rxq_free_elts_sp(struct rxq *rxq)
+{
+ unsigned int i;
+ unsigned int elts_n = rxq->elts_n;
+ struct rxq_elt_sp (*elts)[elts_n] = rxq->elts.sp;
+
+ DEBUG("%p: freeing WRs", (void *)rxq);
+ rxq->elts_n = 0;
+ rxq->elts.sp = NULL;
+ if (elts == NULL)
+ return;
+ for (i = 0; (i != elemof(*elts)); ++i) {
+ unsigned int j;
+ struct rxq_elt_sp *elt = &(*elts)[i];
+
+ for (j = 0; (j != elemof(elt->bufs)); ++j) {
+ struct rte_mbuf *buf = elt->bufs[j];
+
+ if (buf != NULL)
+ rte_pktmbuf_free_seg(buf);
+ }
+ }
+ rte_free(elts);
+}
+
+/**
+ * Allocate RX queue elements.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ * @param elts_n
+ * Number of elements to allocate.
+ * @param[in] pool
+ * If not NULL, fetch buffers from this array instead of allocating them
+ * with rte_pktmbuf_alloc().
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_alloc_elts(struct rxq *rxq, unsigned int elts_n, struct rte_mbuf **pool)
+{
+ unsigned int i;
+ struct rxq_elt (*elts)[elts_n] =
+ rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
+ rxq->socket);
+ int ret = 0;
+
+ if (elts == NULL) {
+ ERROR("%p: can't allocate packets array", (void *)rxq);
+ ret = ENOMEM;
+ goto error;
+ }
+ /* For each WR (packet). */
+ for (i = 0; (i != elts_n); ++i) {
+ struct rxq_elt *elt = &(*elts)[i];
+ struct ibv_recv_wr *wr = &elt->wr;
+ struct ibv_sge *sge = &(*elts)[i].sge;
+ struct rte_mbuf *buf;
+
+ if (pool != NULL) {
+ buf = *(pool++);
+ assert(buf != NULL);
+ rte_pktmbuf_reset(buf);
+ } else
+ buf = rte_pktmbuf_alloc(rxq->mp);
+ if (buf == NULL) {
+ assert(pool == NULL);
+ ERROR("%p: empty mbuf pool", (void *)rxq);
+ ret = ENOMEM;
+ goto error;
+ }
+ /* Configure WR. Work request ID contains its own index in
+ * the elts array and the offset between SGE buffer header and
+ * its data. */
+ WR_ID(wr->wr_id).id = i;
+ WR_ID(wr->wr_id).offset =
+ (((uintptr_t)buf->buf_addr + RTE_PKTMBUF_HEADROOM) -
+ (uintptr_t)buf);
+ wr->next = &(*elts)[(i + 1)].wr;
+ wr->sg_list = sge;
+ wr->num_sge = 1;
+ /* Headroom is reserved by rte_pktmbuf_alloc(). */
+ assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
+ /* Buffer is supposed to be empty. */
+ assert(rte_pktmbuf_data_len(buf) == 0);
+ assert(rte_pktmbuf_pkt_len(buf) == 0);
+ /* sge->addr must be able to store a pointer. */
+ assert(sizeof(sge->addr) >= sizeof(uintptr_t));
+ /* SGE keeps its headroom. */
+ sge->addr = (uintptr_t)
+ ((uint8_t *)buf->buf_addr + RTE_PKTMBUF_HEADROOM);
+ sge->length = (buf->buf_len - RTE_PKTMBUF_HEADROOM);
+ sge->lkey = rxq->mr->lkey;
+ /* Redundant check for tailroom. */
+ assert(sge->length == rte_pktmbuf_tailroom(buf));
+ /* Make sure elts index and SGE mbuf pointer can be deduced
+ * from WR ID. */
+ if ((WR_ID(wr->wr_id).id != i) ||
+ ((void *)(sge->addr - WR_ID(wr->wr_id).offset) != buf)) {
+ ERROR("%p: cannot store index and offset in WR ID",
+ (void *)rxq);
+ sge->addr = 0;
+ rte_pktmbuf_free(buf);
+ ret = EOVERFLOW;
+ goto error;
+ }
+ }
+ /* The last WR pointer must be NULL. */
+ (*elts)[(i - 1)].wr.next = NULL;
+ DEBUG("%p: allocated and configured %u single-segment WRs",
+ (void *)rxq, elts_n);
+ rxq->elts_n = elts_n;
+ rxq->elts.no_sp = elts;
+ assert(ret == 0);
+ return 0;
+error:
+ if (elts != NULL) {
+ assert(pool == NULL);
+ for (i = 0; (i != elemof(*elts)); ++i) {
+ struct rxq_elt *elt = &(*elts)[i];
+ struct rte_mbuf *buf;
+
+ if (elt->sge.addr == 0)
+ continue;
+ assert(WR_ID(elt->wr.wr_id).id == i);
+ buf = (void *)
+ (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
+ rte_pktmbuf_free_seg(buf);
+ }
+ rte_free(elts);
+ }
+ DEBUG("%p: failed, freed everything", (void *)rxq);
+ assert(ret > 0);
+ return ret;
+}
+
+/**
+ * Free RX queue elements.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ */
+static void
+rxq_free_elts(struct rxq *rxq)
+{
+ unsigned int i;
+ unsigned int elts_n = rxq->elts_n;
+ struct rxq_elt (*elts)[elts_n] = rxq->elts.no_sp;
+
+ DEBUG("%p: freeing WRs", (void *)rxq);
+ rxq->elts_n = 0;
+ rxq->elts.no_sp = NULL;
+ if (elts == NULL)
+ return;
+ for (i = 0; (i != elemof(*elts)); ++i) {
+ struct rxq_elt *elt = &(*elts)[i];
+ struct rte_mbuf *buf;
+
+ if (elt->sge.addr == 0)
+ continue;
+ assert(WR_ID(elt->wr.wr_id).id == i);
+ buf = (void *)(elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
+ rte_pktmbuf_free_seg(buf);
+ }
+ rte_free(elts);
+}
+
+/**
+ * Unregister a MAC address from a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ * @param mac_index
+ * MAC address index.
+ */
+static void
+rxq_mac_addr_del(struct rxq *rxq, unsigned int mac_index)
+{
+#ifndef NDEBUG
+ struct priv *priv = rxq->priv;
+ const uint8_t (*mac)[ETHER_ADDR_LEN] =
+ (const uint8_t (*)[ETHER_ADDR_LEN])
+ priv->mac[mac_index].addr_bytes;
+#endif
+
+ assert(mac_index < elemof(priv->mac));
+ if (!BITFIELD_ISSET(rxq->mac_configured, mac_index)) {
+ assert(rxq->mac_flow[mac_index] == NULL);
+ return;
+ }
+ DEBUG("%p: removing MAC address %02x:%02x:%02x:%02x:%02x:%02x"
+ " index %u",
+ (void *)rxq,
+ (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
+ mac_index);
+ assert(rxq->mac_flow[mac_index] != NULL);
+ claim_zero(ibv_exp_destroy_flow(rxq->mac_flow[mac_index]));
+ rxq->mac_flow[mac_index] = NULL;
+ BITFIELD_RESET(rxq->mac_configured, mac_index);
+}
+
+/**
+ * Unregister all MAC addresses from a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ */
+static void
+rxq_mac_addrs_del(struct rxq *rxq)
+{
+ struct priv *priv = rxq->priv;
+ unsigned int i;
+
+ for (i = 0; (i != elemof(priv->mac)); ++i)
+ rxq_mac_addr_del(rxq, i);
+}
+
+static int rxq_promiscuous_enable(struct rxq *);
+static void rxq_promiscuous_disable(struct rxq *);
+
+/**
+ * Register a MAC address in a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ * @param mac_index
+ * MAC address index to register.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_mac_addr_add(struct rxq *rxq, unsigned int mac_index)
+{
+ struct priv *priv = rxq->priv;
+ const uint8_t (*mac)[ETHER_ADDR_LEN] =
+ (const uint8_t (*)[ETHER_ADDR_LEN])
+ priv->mac[mac_index].addr_bytes;
+ unsigned int vlans = 0;
+ unsigned int specs = 0;
+ unsigned int i, j;
+ struct ibv_exp_flow *flow;
+
+ assert(mac_index < elemof(priv->mac));
+ if (BITFIELD_ISSET(rxq->mac_configured, mac_index))
+ rxq_mac_addr_del(rxq, mac_index);
+ /* Number of configured VLANs. */
+ for (i = 0; (i != elemof(priv->vlan_filter)); ++i)
+ if (priv->vlan_filter[i].enabled)
+ ++vlans;
+ specs = (vlans ? vlans : 1);
+
+ /* Allocate flow specification on the stack. */
+ struct ibv_exp_flow_attr data
+ [1 +
+ (sizeof(struct ibv_exp_flow_spec_eth[specs]) /
+ sizeof(struct ibv_exp_flow_attr)) +
+ !!(sizeof(struct ibv_exp_flow_spec_eth[specs]) %
+ sizeof(struct ibv_exp_flow_attr))];
+ struct ibv_exp_flow_attr *attr = (void *)&data[0];
+ struct ibv_exp_flow_spec_eth *spec = (void *)&data[1];
+
+ /*
+ * No padding must be inserted by the compiler between attr and spec.
+ * This layout is expected by libibverbs.
+ */
+ assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec);
+ *attr = (struct ibv_exp_flow_attr){
+ .type = IBV_EXP_FLOW_ATTR_NORMAL,
+ .num_of_specs = specs,
+ .port = priv->port,
+ .flags = 0
+ };
+ *spec = (struct ibv_exp_flow_spec_eth){
+ .type = IBV_EXP_FLOW_SPEC_ETH,
+ .size = sizeof(*spec),
+ .val = {
+ .dst_mac = {
+ (*mac)[0], (*mac)[1], (*mac)[2],
+ (*mac)[3], (*mac)[4], (*mac)[5]
+ }
+ },
+ .mask = {
+ .dst_mac = "\xff\xff\xff\xff\xff\xff",
+ .vlan_tag = (vlans ? htons(0xfff) : 0)
+ }
+ };
+ /* Fill VLAN specifications. */
+ for (i = 0, j = 0; (i != elemof(priv->vlan_filter)); ++i) {
+ if (!priv->vlan_filter[i].enabled)
+ continue;
+ assert(j != vlans);
+ if (j)
+ spec[j] = spec[0];
+ spec[j].val.vlan_tag = htons(priv->vlan_filter[i].id);
+ ++j;
+ }
+ DEBUG("%p: adding MAC address %02x:%02x:%02x:%02x:%02x:%02x index %u"
+ " (%u VLAN(s) configured)",
+ (void *)rxq,
+ (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
+ mac_index,
+ vlans);
+ /* Create related flow. */
+ errno = 0;
+ flow = ibv_exp_create_flow(rxq->qp, attr);
+ if (flow == NULL) {
+ int err = errno;
+
+ /* Flow creation failure is not fatal when in DMFS A0 mode.
+ * Ignore error if promiscuity is already enabled or can be
+ * enabled. */
+ if (priv->promisc_ok)
+ return 0;
+ if ((rxq->promisc_flow != NULL) ||
+ (rxq_promiscuous_enable(rxq) == 0)) {
+ if (rxq->promisc_flow != NULL)
+ rxq_promiscuous_disable(rxq);
+ WARN("cannot configure normal flow but promiscuous"
+ " mode is fine, assuming promiscuous optimization"
+ " is enabled"
+ " (options mlx4_core log_num_mgm_entry_size=-7)");
+ priv->promisc_ok = 1;
+ return 0;
+ }
+ errno = err;
+ /* It's not clear whether errno is always set in this case. */
+ ERROR("%p: flow configuration failed, errno=%d: %s",
+ (void *)rxq, errno,
+ (errno ? strerror(errno) : "Unknown error"));
+ if (errno)
+ return errno;
+ return EINVAL;
+ }
+ assert(rxq->mac_flow[mac_index] == NULL);
+ rxq->mac_flow[mac_index] = flow;
+ BITFIELD_SET(rxq->mac_configured, mac_index);
+ return 0;
+}
+
+/**
+ * Register all MAC addresses in a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_mac_addrs_add(struct rxq *rxq)
+{
+ struct priv *priv = rxq->priv;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; (i != elemof(priv->mac)); ++i) {
+ if (!BITFIELD_ISSET(priv->mac_configured, i))
+ continue;
+ ret = rxq_mac_addr_add(rxq, i);
+ if (!ret)
+ continue;
+ /* Failure, rollback. */
+ while (i != 0)
+ rxq_mac_addr_del(rxq, --i);
+ assert(ret > 0);
+ return ret;
+ }
+ return 0;
+}
+
+/**
+ * Unregister a MAC address.
+ *
+ * In RSS mode, the MAC address is unregistered from the parent queue,
+ * otherwise it is unregistered from each queue directly.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param mac_index
+ * MAC address index.
+ */
+static void
+priv_mac_addr_del(struct priv *priv, unsigned int mac_index)
+{
+ unsigned int i;
+
+ assert(mac_index < elemof(priv->mac));
+ if (!BITFIELD_ISSET(priv->mac_configured, mac_index))
+ return;
+ if (priv->rss) {
+ rxq_mac_addr_del(&priv->rxq_parent, mac_index);
+ goto end;
+ }
+ for (i = 0; (i != priv->dev->data->nb_rx_queues); ++i)
+ rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
+end:
+ BITFIELD_RESET(priv->mac_configured, mac_index);
+}
+
+/**
+ * Register a MAC address.
+ *
+ * In RSS mode, the MAC address is registered in the parent queue,
+ * otherwise it is registered in each queue directly.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param mac_index
+ * MAC address index to use.
+ * @param mac
+ * MAC address to register.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+priv_mac_addr_add(struct priv *priv, unsigned int mac_index,
+ const uint8_t (*mac)[ETHER_ADDR_LEN])
+{
+ unsigned int i;
+ int ret;
+
+ assert(mac_index < elemof(priv->mac));
+ /* First, make sure this address isn't already configured. */
+ for (i = 0; (i != elemof(priv->mac)); ++i) {
+ /* Skip this index, it's going to be reconfigured. */
+ if (i == mac_index)
+ continue;
+ if (!BITFIELD_ISSET(priv->mac_configured, i))
+ continue;
+ if (memcmp(priv->mac[i].addr_bytes, *mac, sizeof(*mac)))
+ continue;
+ /* Address already configured elsewhere, return with error. */
+ return EADDRINUSE;
+ }
+ if (BITFIELD_ISSET(priv->mac_configured, mac_index))
+ priv_mac_addr_del(priv, mac_index);
+ priv->mac[mac_index] = (struct ether_addr){
+ {
+ (*mac)[0], (*mac)[1], (*mac)[2],
+ (*mac)[3], (*mac)[4], (*mac)[5]
+ }
+ };
+ /* If device isn't started, this is all we need to do. */
+ if (!priv->started) {
+#ifndef NDEBUG
+ /* Verify that all queues have this index disabled. */
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ if ((*priv->rxqs)[i] == NULL)
+ continue;
+ assert(!BITFIELD_ISSET
+ ((*priv->rxqs)[i]->mac_configured, mac_index));
+ }
+#endif
+ goto end;
+ }
+ if (priv->rss) {
+ ret = rxq_mac_addr_add(&priv->rxq_parent, mac_index);
+ if (ret)
+ return ret;
+ goto end;
+ }
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ if ((*priv->rxqs)[i] == NULL)
+ continue;
+ ret = rxq_mac_addr_add((*priv->rxqs)[i], mac_index);
+ if (!ret)
+ continue;
+ /* Failure, rollback. */
+ while (i != 0)
+ if ((*priv->rxqs)[(--i)] != NULL)
+ rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
+ return ret;
+ }
+end:
+ BITFIELD_SET(priv->mac_configured, mac_index);
+ return 0;
+}
+
+/**
+ * Enable allmulti mode in a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_allmulticast_enable(struct rxq *rxq)
+{
+ struct ibv_exp_flow *flow;
+ struct ibv_exp_flow_attr attr = {
+ .type = IBV_EXP_FLOW_ATTR_MC_DEFAULT,
+ .num_of_specs = 0,
+ .port = rxq->priv->port,
+ .flags = 0
+ };
+
+ DEBUG("%p: enabling allmulticast mode", (void *)rxq);
+ if (rxq->allmulti_flow != NULL)
+ return EBUSY;
+ errno = 0;
+ flow = ibv_exp_create_flow(rxq->qp, &attr);
+ if (flow == NULL) {
+ /* It's not clear whether errno is always set in this case. */
+ ERROR("%p: flow configuration failed, errno=%d: %s",
+ (void *)rxq, errno,
+ (errno ? strerror(errno) : "Unknown error"));
+ if (errno)
+ return errno;
+ return EINVAL;
+ }
+ rxq->allmulti_flow = flow;
+ DEBUG("%p: allmulticast mode enabled", (void *)rxq);
+ return 0;
+}
+
+/**
+ * Disable allmulti mode in a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ */
+static void
+rxq_allmulticast_disable(struct rxq *rxq)
+{
+ DEBUG("%p: disabling allmulticast mode", (void *)rxq);
+ if (rxq->allmulti_flow == NULL)
+ return;
+ claim_zero(ibv_exp_destroy_flow(rxq->allmulti_flow));
+ rxq->allmulti_flow = NULL;
+ DEBUG("%p: allmulticast mode disabled", (void *)rxq);
+}
+
+/**
+ * Enable promiscuous mode in a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_promiscuous_enable(struct rxq *rxq)
+{
+ struct ibv_exp_flow *flow;
+ struct ibv_exp_flow_attr attr = {
+ .type = IBV_EXP_FLOW_ATTR_ALL_DEFAULT,
+ .num_of_specs = 0,
+ .port = rxq->priv->port,
+ .flags = 0
+ };
+
+ if (rxq->priv->vf)
+ return 0;
+ DEBUG("%p: enabling promiscuous mode", (void *)rxq);
+ if (rxq->promisc_flow != NULL)
+ return EBUSY;
+ errno = 0;
+ flow = ibv_exp_create_flow(rxq->qp, &attr);
+ if (flow == NULL) {
+ /* It's not clear whether errno is always set in this case. */
+ ERROR("%p: flow configuration failed, errno=%d: %s",
+ (void *)rxq, errno,
+ (errno ? strerror(errno) : "Unknown error"));
+ if (errno)
+ return errno;
+ return EINVAL;
+ }
+ rxq->promisc_flow = flow;
+ DEBUG("%p: promiscuous mode enabled", (void *)rxq);
+ return 0;
+}
+
+/**
+ * Disable promiscuous mode in a RX queue.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ */
+static void
+rxq_promiscuous_disable(struct rxq *rxq)
+{
+ if (rxq->priv->vf)
+ return;
+ DEBUG("%p: disabling promiscuous mode", (void *)rxq);
+ if (rxq->promisc_flow == NULL)
+ return;
+ claim_zero(ibv_exp_destroy_flow(rxq->promisc_flow));
+ rxq->promisc_flow = NULL;
+ DEBUG("%p: promiscuous mode disabled", (void *)rxq);
+}
+
+/**
+ * Clean up a RX queue.
+ *
+ * Destroy objects, free allocated memory and reset the structure for reuse.
+ *
+ * @param rxq
+ * Pointer to RX queue structure.
+ */
+static void
+rxq_cleanup(struct rxq *rxq)
+{
+ DEBUG("cleaning up %p", (void *)rxq);
+ if (rxq->sp)
+ rxq_free_elts_sp(rxq);
+ else
+ rxq_free_elts(rxq);
+ if (rxq->qp != NULL) {
+ rxq_promiscuous_disable(rxq);
+ rxq_allmulticast_disable(rxq);
+ rxq_mac_addrs_del(rxq);
+ claim_zero(ibv_destroy_qp(rxq->qp));
+ }
+ if (rxq->cq != NULL)
+ claim_zero(ibv_destroy_cq(rxq->cq));
+ if (rxq->mr != NULL)
+ claim_zero(ibv_dereg_mr(rxq->mr));
+ memset(rxq, 0, sizeof(*rxq));
+}
+
+static uint16_t
+mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n);
+
+/**
+ * DPDK callback for RX with scattered packets support.
+ *
+ * @param dpdk_rxq
+ * Generic pointer to RX queue structure.
+ * @param[out] pkts
+ * Array to store received packets.
+ * @param pkts_n
+ * Maximum number of packets in array.
+ *
+ * @return
+ * Number of packets successfully received (<= pkts_n).
+ */
+static uint16_t
+mlx4_rx_burst_sp(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
+{
+ struct rxq *rxq = (struct rxq *)dpdk_rxq;
+ struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
+ struct ibv_wc wcs[pkts_n];
+ struct ibv_recv_wr head;
+ struct ibv_recv_wr **next = &head.next;
+ struct ibv_recv_wr *bad_wr;
+ int ret = 0;
+ int wcs_n;
+ int i;
+
+ if (unlikely(!rxq->sp))
+ return mlx4_rx_burst(dpdk_rxq, pkts, pkts_n);
+ if (unlikely(elts == NULL)) /* See RTE_DEV_CMD_SET_MTU. */
+ return 0;
+ wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
+ if (unlikely(wcs_n == 0))
+ return 0;
+ if (unlikely(wcs_n < 0)) {
+ DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
+ (void *)rxq, wcs_n);
+ return 0;
+ }
+ assert(wcs_n <= (int)pkts_n);
+ /* For each work completion. */
+ for (i = 0; (i != wcs_n); ++i) {
+ struct ibv_wc *wc = &wcs[i];
+ uint64_t wr_id = wc->wr_id;
+ uint32_t len = wc->byte_len;
+ struct rxq_elt_sp *elt = &(*elts)[wr_id];
+ struct ibv_recv_wr *wr = &elt->wr;
+ struct rte_mbuf *pkt_buf = NULL; /* Buffer returned in pkts. */
+ struct rte_mbuf **pkt_buf_next = &pkt_buf;
+ unsigned int seg_headroom = RTE_PKTMBUF_HEADROOM;
+ unsigned int j = 0;
+
+ /* Sanity checks. */
+ assert(wr_id < rxq->elts_n);
+ assert(wr_id == wr->wr_id);
+ assert(wr->sg_list == elt->sges);
+ assert(wr->num_sge == elemof(elt->sges));
+ /* Link completed WRs together for repost. */
+ *next = wr;
+ next = &wr->next;
+ if (unlikely(wc->status != IBV_WC_SUCCESS)) {
+ /* Whatever, just repost the offending WR. */
+ DEBUG("rxq=%p, wr_id=%" PRIu64 ": bad work completion"
+ " status (%d): %s",
+ (void *)rxq, wc->wr_id, wc->status,
+ ibv_wc_status_str(wc->status));
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increase dropped packets counter. */
+ ++rxq->stats.idropped;
+#endif
+ goto repost;
+ }
+ /*
+ * Replace spent segments with new ones, concatenate and
+ * return them as pkt_buf.
+ */
+ while (1) {
+ struct ibv_sge *sge = &elt->sges[j];
+ struct rte_mbuf *seg = elt->bufs[j];
+ struct rte_mbuf *rep;
+ unsigned int seg_tailroom;
+
+ /*
+ * Fetch initial bytes of packet descriptor into a
+ * cacheline while allocating rep.
+ */
+ rte_prefetch0(seg);
+ rep = __rte_mbuf_raw_alloc(rxq->mp);
+ if (unlikely(rep == NULL)) {
+ /*
+ * Unable to allocate a replacement mbuf,
+ * repost WR.
+ */
+ DEBUG("rxq=%p, wr_id=%" PRIu64 ":"
+ " can't allocate a new mbuf",
+ (void *)rxq, wr_id);
+ if (pkt_buf != NULL)
+ rte_pktmbuf_free(pkt_buf);
+ /* Increase out of memory counters. */
+ ++rxq->stats.rx_nombuf;
+ ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
+ goto repost;
+ }
+#ifndef NDEBUG
+ /* Poison user-modifiable fields in rep. */
+ NEXT(rep) = (void *)((uintptr_t)-1);
+ SET_DATA_OFF(rep, 0xdead);
+ DATA_LEN(rep) = 0xd00d;
+ PKT_LEN(rep) = 0xdeadd00d;
+ NB_SEGS(rep) = 0x2a;
+ PORT(rep) = 0x2a;
+ rep->ol_flags = -1;
+#endif
+ assert(rep->buf_len == seg->buf_len);
+ assert(rep->buf_len == rxq->mb_len);
+ /* Reconfigure sge to use rep instead of seg. */
+ assert(sge->lkey == rxq->mr->lkey);
+ sge->addr = ((uintptr_t)rep->buf_addr + seg_headroom);
+ elt->bufs[j] = rep;
+ ++j;
+ /* Update pkt_buf if it's the first segment, or link
+ * seg to the previous one and update pkt_buf_next. */
+ *pkt_buf_next = seg;
+ pkt_buf_next = &NEXT(seg);
+ /* Update seg information. */
+ seg_tailroom = (seg->buf_len - seg_headroom);
+ assert(sge->length == seg_tailroom);
+ SET_DATA_OFF(seg, seg_headroom);
+ if (likely(len <= seg_tailroom)) {
+ /* Last segment. */
+ DATA_LEN(seg) = len;
+ PKT_LEN(seg) = len;
+ /* Sanity check. */
+ assert(rte_pktmbuf_headroom(seg) ==
+ seg_headroom);
+ assert(rte_pktmbuf_tailroom(seg) ==
+ (seg_tailroom - len));
+ break;
+ }
+ DATA_LEN(seg) = seg_tailroom;
+ PKT_LEN(seg) = seg_tailroom;
+ /* Sanity check. */
+ assert(rte_pktmbuf_headroom(seg) == seg_headroom);
+ assert(rte_pktmbuf_tailroom(seg) == 0);
+ /* Fix len and clear headroom for next segments. */
+ len -= seg_tailroom;
+ seg_headroom = 0;
+ }
+ /* Update head and tail segments. */
+ *pkt_buf_next = NULL;
+ assert(pkt_buf != NULL);
+ assert(j != 0);
+ NB_SEGS(pkt_buf) = j;
+ PORT(pkt_buf) = rxq->port_id;
+ PKT_LEN(pkt_buf) = wc->byte_len;
+ pkt_buf->ol_flags = 0;
+
+ /* Return packet. */
+ *(pkts++) = pkt_buf;
+ ++ret;
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increase bytes counter. */
+ rxq->stats.ibytes += wc->byte_len;
+#endif
+repost:
+ continue;
+ }
+ *next = NULL;
+ /* Repost WRs. */
+#ifdef DEBUG_RECV
+ DEBUG("%p: reposting %d WRs starting from %" PRIu64 " (%p)",
+ (void *)rxq, wcs_n, wcs[0].wr_id, (void *)head.next);
+#endif
+ i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
+ if (unlikely(i)) {
+ /* Inability to repost WRs is fatal. */
+ DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
+ (void *)rxq->priv,
+ (void *)bad_wr,
+ strerror(i));
+ abort();
+ }
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increase packets counter. */
+ rxq->stats.ipackets += ret;
+#endif
+ return ret;
+}
+
+/**
+ * DPDK callback for RX.
+ *
+ * The following function is the same as mlx4_rx_burst_sp(), except it doesn't
+ * manage scattered packets. Improves performance when MRU is lower than the
+ * size of the first segment.
+ *
+ * @param dpdk_rxq
+ * Generic pointer to RX queue structure.
+ * @param[out] pkts
+ * Array to store received packets.
+ * @param pkts_n
+ * Maximum number of packets in array.
+ *
+ * @return
+ * Number of packets successfully received (<= pkts_n).
+ */
+static uint16_t
+mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
+{
+ struct rxq *rxq = (struct rxq *)dpdk_rxq;
+ struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
+ struct ibv_wc wcs[pkts_n];
+ struct ibv_recv_wr head;
+ struct ibv_recv_wr **next = &head.next;
+ struct ibv_recv_wr *bad_wr;
+ int ret = 0;
+ int wcs_n;
+ int i;
+
+ if (unlikely(rxq->sp))
+ return mlx4_rx_burst_sp(dpdk_rxq, pkts, pkts_n);
+ wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
+ if (unlikely(wcs_n == 0))
+ return 0;
+ if (unlikely(wcs_n < 0)) {
+ DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
+ (void *)rxq, wcs_n);
+ return 0;
+ }
+ assert(wcs_n <= (int)pkts_n);
+ /* For each work completion. */
+ for (i = 0; (i != wcs_n); ++i) {
+ struct ibv_wc *wc = &wcs[i];
+ uint64_t wr_id = wc->wr_id;
+ uint32_t len = wc->byte_len;
+ struct rxq_elt *elt = &(*elts)[WR_ID(wr_id).id];
+ struct ibv_recv_wr *wr = &elt->wr;
+ struct rte_mbuf *seg =
+ (void *)(elt->sge.addr - WR_ID(wr_id).offset);
+ struct rte_mbuf *rep;
+
+ /* Sanity checks. */
+ assert(WR_ID(wr_id).id < rxq->elts_n);
+ assert(wr_id == wr->wr_id);
+ assert(wr->sg_list == &elt->sge);
+ assert(wr->num_sge == 1);
+ /* Link completed WRs together for repost. */
+ *next = wr;
+ next = &wr->next;
+ if (unlikely(wc->status != IBV_WC_SUCCESS)) {
+ /* Whatever, just repost the offending WR. */
+ DEBUG("rxq=%p, wr_id=%" PRIu32 ": bad work completion"
+ " status (%d): %s",
+ (void *)rxq, WR_ID(wr_id).id, wc->status,
+ ibv_wc_status_str(wc->status));
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increase dropped packets counter. */
+ ++rxq->stats.idropped;
+#endif
+ goto repost;
+ }
+ /*
+ * Fetch initial bytes of packet descriptor into a
+ * cacheline while allocating rep.
+ */
+ rte_prefetch0(seg);
+ rep = __rte_mbuf_raw_alloc(rxq->mp);
+ if (unlikely(rep == NULL)) {
+ /*
+ * Unable to allocate a replacement mbuf,
+ * repost WR.
+ */
+ DEBUG("rxq=%p, wr_id=%" PRIu32 ":"
+ " can't allocate a new mbuf",
+ (void *)rxq, WR_ID(wr_id).id);
+ /* Increase out of memory counters. */
+ ++rxq->stats.rx_nombuf;
+ ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
+ goto repost;
+ }
+
+ /* Reconfigure sge to use rep instead of seg. */
+ elt->sge.addr = (uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM;
+ assert(elt->sge.lkey == rxq->mr->lkey);
+ WR_ID(wr->wr_id).offset =
+ (((uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM) -
+ (uintptr_t)rep);
+ assert(WR_ID(wr->wr_id).id == WR_ID(wr_id).id);
+
+ /* Update seg information. */
+ SET_DATA_OFF(seg, RTE_PKTMBUF_HEADROOM);
+ NB_SEGS(seg) = 1;
+ PORT(seg) = rxq->port_id;
+ NEXT(seg) = NULL;
+ PKT_LEN(seg) = len;
+ DATA_LEN(seg) = len;
+ seg->ol_flags = 0;
+
+ /* Return packet. */
+ *(pkts++) = seg;
+ ++ret;
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increase bytes counter. */
+ rxq->stats.ibytes += wc->byte_len;
+#endif
+repost:
+ continue;
+ }
+ *next = NULL;
+ /* Repost WRs. */
+#ifdef DEBUG_RECV
+ DEBUG("%p: reposting %d WRs starting from %" PRIu32 " (%p)",
+ (void *)rxq, wcs_n, WR_ID(wcs[0].wr_id).id, (void *)head.next);
+#endif
+ i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
+ if (unlikely(i)) {
+ /* Inability to repost WRs is fatal. */
+ DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
+ (void *)rxq->priv,
+ (void *)bad_wr,
+ strerror(i));
+ abort();
+ }
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ /* Increase packets counter. */
+ rxq->stats.ipackets += ret;
+#endif
+ return ret;
+}
+
+#ifdef INLINE_RECV
+
+/**
+ * Allocate a Queue Pair in case inline receive is supported.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param cq
+ * Completion queue to associate with QP.
+ * @param desc
+ * Number of descriptors in QP (hint only).
+ *
+ * @return
+ * QP pointer or NULL in case of error.
+ */
+static struct ibv_qp *
+rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
+{
+ struct ibv_exp_qp_init_attr attr = {
+ /* CQ to be associated with the send queue. */
+ .send_cq = cq,
+ /* CQ to be associated with the receive queue. */
+ .recv_cq = cq,
+ .max_inl_recv = priv->inl_recv_size,
+ .cap = {
+ /* Max number of outstanding WRs. */
+ .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
+ priv->device_attr.max_qp_wr :
+ desc),
+ /* Max number of scatter/gather elements in a WR. */
+ .max_recv_sge = ((priv->device_attr.max_sge <
+ MLX4_PMD_SGE_WR_N) ?
+ priv->device_attr.max_sge :
+ MLX4_PMD_SGE_WR_N),
+ },
+ .qp_type = IBV_QPT_RAW_PACKET,
+ .pd = priv->pd
+ };
+
+ attr.comp_mask = IBV_EXP_QP_INIT_ATTR_PD;
+ attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
+
+ return ibv_exp_create_qp(priv->ctx, &attr);
+}
+
+#else /* INLINE_RECV */
+
+/**
+ * Allocate a Queue Pair.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param cq
+ * Completion queue to associate with QP.
+ * @param desc
+ * Number of descriptors in QP (hint only).
+ *
+ * @return
+ * QP pointer or NULL in case of error.
+ */
+static struct ibv_qp *
+rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
+{
+ struct ibv_qp_init_attr attr = {
+ /* CQ to be associated with the send queue. */
+ .send_cq = cq,
+ /* CQ to be associated with the receive queue. */
+ .recv_cq = cq,
+ .cap = {
+ /* Max number of outstanding WRs. */
+ .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
+ priv->device_attr.max_qp_wr :
+ desc),
+ /* Max number of scatter/gather elements in a WR. */
+ .max_recv_sge = ((priv->device_attr.max_sge <
+ MLX4_PMD_SGE_WR_N) ?
+ priv->device_attr.max_sge :
+ MLX4_PMD_SGE_WR_N),
+ },
+ .qp_type = IBV_QPT_RAW_PACKET
+ };
+
+ return ibv_create_qp(priv->pd, &attr);
+}
+
+#endif /* INLINE_RECV */
+
+#ifdef RSS_SUPPORT
+
+/**
+ * Allocate a RSS Queue Pair.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param cq
+ * Completion queue to associate with QP.
+ * @param desc
+ * Number of descriptors in QP (hint only).
+ * @param parent
+ * If nonzero, create a parent QP, otherwise a child.
+ *
+ * @return
+ * QP pointer or NULL in case of error.
+ */
+static struct ibv_qp *
+rxq_setup_qp_rss(struct priv *priv, struct ibv_cq *cq, uint16_t desc,
+ int parent)
+{
+ struct ibv_exp_qp_init_attr attr = {
+ /* CQ to be associated with the send queue. */
+ .send_cq = cq,
+ /* CQ to be associated with the receive queue. */
+ .recv_cq = cq,
+#ifdef INLINE_RECV
+ .max_inl_recv = priv->inl_recv_size,
+#endif
+ .cap = {
+ /* Max number of outstanding WRs. */
+ .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
+ priv->device_attr.max_qp_wr :
+ desc),
+ /* Max number of scatter/gather elements in a WR. */
+ .max_recv_sge = ((priv->device_attr.max_sge <
+ MLX4_PMD_SGE_WR_N) ?
+ priv->device_attr.max_sge :
+ MLX4_PMD_SGE_WR_N),
+ },
+ .qp_type = IBV_QPT_RAW_PACKET,
+ .comp_mask = (IBV_EXP_QP_INIT_ATTR_PD |
+ IBV_EXP_QP_INIT_ATTR_QPG),
+ .pd = priv->pd
+ };
+
+#ifdef INLINE_RECV
+ attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
+#endif
+ if (parent) {
+ attr.qpg.qpg_type = IBV_EXP_QPG_PARENT;
+ /* TSS isn't necessary. */
+ attr.qpg.parent_attrib.tss_child_count = 0;
+ attr.qpg.parent_attrib.rss_child_count = priv->rxqs_n;
+ DEBUG("initializing parent RSS queue");
+ } else {
+ attr.qpg.qpg_type = IBV_EXP_QPG_CHILD_RX;
+ attr.qpg.qpg_parent = priv->rxq_parent.qp;
+ DEBUG("initializing child RSS queue");
+ }
+ return ibv_exp_create_qp(priv->ctx, &attr);
+}
+
+#endif /* RSS_SUPPORT */
+
+/**
+ * Reconfigure a RX queue with new parameters.
+ *
+ * rxq_rehash() does not allocate mbufs, which, if not done from the right
+ * thread (such as a control thread), may corrupt the pool.
+ * In case of failure, the queue is left untouched.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param rxq
+ * RX queue pointer.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_rehash(struct rte_eth_dev *dev, struct rxq *rxq)
+{
+ struct priv *priv = rxq->priv;
+ struct rxq tmpl = *rxq;
+ unsigned int mbuf_n;
+ unsigned int desc_n;
+ struct rte_mbuf **pool;
+ unsigned int i, k;
+ struct ibv_exp_qp_attr mod;
+ struct ibv_recv_wr *bad_wr;
+ int err;
+ int parent = (rxq == &priv->rxq_parent);
+
+ if (parent) {
+ ERROR("%p: cannot rehash parent queue %p",
+ (void *)dev, (void *)rxq);
+ return EINVAL;
+ }
+ DEBUG("%p: rehashing queue %p", (void *)dev, (void *)rxq);
+ /* Number of descriptors and mbufs currently allocated. */
+ desc_n = (tmpl.elts_n * (tmpl.sp ? MLX4_PMD_SGE_WR_N : 1));
+ mbuf_n = desc_n;
+ /* Enable scattered packets support for this queue if necessary. */
+ if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
+ (dev->data->dev_conf.rxmode.max_rx_pkt_len >
+ (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
+ tmpl.sp = 1;
+ desc_n /= MLX4_PMD_SGE_WR_N;
+ } else
+ tmpl.sp = 0;
+ DEBUG("%p: %s scattered packets support (%u WRs)",
+ (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc_n);
+ /* If scatter mode is the same as before, nothing to do. */
+ if (tmpl.sp == rxq->sp) {
+ DEBUG("%p: nothing to do", (void *)dev);
+ return 0;
+ }
+ /* Remove attached flows if RSS is disabled (no parent queue). */
+ if (!priv->rss) {
+ rxq_allmulticast_disable(&tmpl);
+ rxq_promiscuous_disable(&tmpl);
+ rxq_mac_addrs_del(&tmpl);
+ /* Update original queue in case of failure. */
+ rxq->allmulti_flow = tmpl.allmulti_flow;
+ rxq->promisc_flow = tmpl.promisc_flow;
+ memcpy(rxq->mac_configured, tmpl.mac_configured,
+ sizeof(rxq->mac_configured));
+ memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
+ }
+ /* From now on, any failure will render the queue unusable.
+ * Reinitialize QP. */
+ mod = (struct ibv_exp_qp_attr){ .qp_state = IBV_QPS_RESET };
+ err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
+ if (err) {
+ ERROR("%p: cannot reset QP: %s", (void *)dev, strerror(err));
+ assert(err > 0);
+ return err;
+ }
+ err = ibv_resize_cq(tmpl.cq, desc_n);
+ if (err) {
+ ERROR("%p: cannot resize CQ: %s", (void *)dev, strerror(err));
+ assert(err > 0);
+ return err;
+ }
+ mod = (struct ibv_exp_qp_attr){
+ /* Move the QP to this state. */
+ .qp_state = IBV_QPS_INIT,
+ /* Primary port number. */
+ .port_num = priv->port
+ };
+ err = ibv_exp_modify_qp(tmpl.qp, &mod,
+ (IBV_EXP_QP_STATE |
+#ifdef RSS_SUPPORT
+ (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
+#endif /* RSS_SUPPORT */
+ IBV_EXP_QP_PORT));
+ if (err) {
+ ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
+ (void *)dev, strerror(err));
+ assert(err > 0);
+ return err;
+ };
+ /* Reconfigure flows. Do not care for errors. */
+ if (!priv->rss) {
+ rxq_mac_addrs_add(&tmpl);
+ if (priv->promisc)
+ rxq_promiscuous_enable(&tmpl);
+ if (priv->allmulti)
+ rxq_allmulticast_enable(&tmpl);
+ /* Update original queue in case of failure. */
+ rxq->allmulti_flow = tmpl.allmulti_flow;
+ rxq->promisc_flow = tmpl.promisc_flow;
+ memcpy(rxq->mac_configured, tmpl.mac_configured,
+ sizeof(rxq->mac_configured));
+ memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
+ }
+ /* Allocate pool. */
+ pool = rte_malloc(__func__, (mbuf_n * sizeof(*pool)), 0);
+ if (pool == NULL) {
+ ERROR("%p: cannot allocate memory", (void *)dev);
+ return ENOBUFS;
+ }
+ /* Snatch mbufs from original queue. */
+ k = 0;
+ if (rxq->sp) {
+ struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
+
+ for (i = 0; (i != elemof(*elts)); ++i) {
+ struct rxq_elt_sp *elt = &(*elts)[i];
+ unsigned int j;
+
+ for (j = 0; (j != elemof(elt->bufs)); ++j) {
+ assert(elt->bufs[j] != NULL);
+ pool[k++] = elt->bufs[j];
+ }
+ }
+ } else {
+ struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
+
+ for (i = 0; (i != elemof(*elts)); ++i) {
+ struct rxq_elt *elt = &(*elts)[i];
+ struct rte_mbuf *buf = (void *)
+ (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
+
+ assert(WR_ID(elt->wr.wr_id).id == i);
+ pool[k++] = buf;
+ }
+ }
+ assert(k == mbuf_n);
+ tmpl.elts_n = 0;
+ tmpl.elts.sp = NULL;
+ assert((void *)&tmpl.elts.sp == (void *)&tmpl.elts.no_sp);
+ err = ((tmpl.sp) ?
+ rxq_alloc_elts_sp(&tmpl, desc_n, pool) :
+ rxq_alloc_elts(&tmpl, desc_n, pool));
+ if (err) {
+ ERROR("%p: cannot reallocate WRs, aborting", (void *)dev);
+ rte_free(pool);
+ assert(err > 0);
+ return err;
+ }
+ assert(tmpl.elts_n == desc_n);
+ assert(tmpl.elts.sp != NULL);
+ rte_free(pool);
+ /* Clean up original data. */
+ rxq->elts_n = 0;
+ rte_free(rxq->elts.sp);
+ rxq->elts.sp = NULL;
+ /* Post WRs. */
+ err = ibv_post_recv(tmpl.qp,
+ (tmpl.sp ?
+ &(*tmpl.elts.sp)[0].wr :
+ &(*tmpl.elts.no_sp)[0].wr),
+ &bad_wr);
+ if (err) {
+ ERROR("%p: ibv_post_recv() failed for WR %p: %s",
+ (void *)dev,
+ (void *)bad_wr,
+ strerror(err));
+ goto skip_rtr;
+ }
+ mod = (struct ibv_exp_qp_attr){
+ .qp_state = IBV_QPS_RTR
+ };
+ err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
+ if (err)
+ ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
+ (void *)dev, strerror(err));
+skip_rtr:
+ *rxq = tmpl;
+ assert(err >= 0);
+ return err;
+}
+
+/**
+ * Configure a RX queue.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param rxq
+ * Pointer to RX queue structure.
+ * @param desc
+ * Number of descriptors to configure in queue.
+ * @param socket
+ * NUMA socket on which memory must be allocated.
+ * @param[in] conf
+ * Thresholds parameters.
+ * @param mp
+ * Memory pool for buffer allocations.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
+ unsigned int socket, const struct rte_eth_rxconf *conf,
+ struct rte_mempool *mp)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct rxq tmpl = {
+ .priv = priv,
+ .mp = mp,
+ .socket = socket
+ };
+ struct ibv_exp_qp_attr mod;
+ struct ibv_recv_wr *bad_wr;
+ struct rte_mbuf *buf;
+ int ret = 0;
+ int parent = (rxq == &priv->rxq_parent);
+
+ (void)conf; /* Thresholds configuration (ignored). */
+ /*
+ * If this is a parent queue, hardware must support RSS and
+ * RSS must be enabled.
+ */
+ assert((!parent) || ((priv->hw_rss) && (priv->rss)));
+ if (parent) {
+ /* Even if unused, ibv_create_cq() requires at least one
+ * descriptor. */
+ desc = 1;
+ goto skip_mr;
+ }
+ if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
+ ERROR("%p: invalid number of RX descriptors (must be a"
+ " multiple of %d)", (void *)dev, desc);
+ return EINVAL;
+ }
+ /* Get mbuf length. */
+ buf = rte_pktmbuf_alloc(mp);
+ if (buf == NULL) {
+ ERROR("%p: unable to allocate mbuf", (void *)dev);
+ return ENOMEM;
+ }
+ tmpl.mb_len = buf->buf_len;
+ assert((rte_pktmbuf_headroom(buf) +
+ rte_pktmbuf_tailroom(buf)) == tmpl.mb_len);
+ assert(rte_pktmbuf_headroom(buf) == RTE_PKTMBUF_HEADROOM);
+ rte_pktmbuf_free(buf);
+ /* Enable scattered packets support for this queue if necessary. */
+ if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
+ (dev->data->dev_conf.rxmode.max_rx_pkt_len >
+ (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
+ tmpl.sp = 1;
+ desc /= MLX4_PMD_SGE_WR_N;
+ }
+ DEBUG("%p: %s scattered packets support (%u WRs)",
+ (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc);
+ /* Use the entire RX mempool as the memory region. */
+ tmpl.mr = ibv_reg_mr(priv->pd,
+ (void *)mp->elt_va_start,
+ (mp->elt_va_end - mp->elt_va_start),
+ (IBV_ACCESS_LOCAL_WRITE |
+ IBV_ACCESS_REMOTE_WRITE));
+ if (tmpl.mr == NULL) {
+ ret = EINVAL;
+ ERROR("%p: MR creation failure: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+skip_mr:
+ tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
+ if (tmpl.cq == NULL) {
+ ret = ENOMEM;
+ ERROR("%p: CQ creation failure: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ DEBUG("priv->device_attr.max_qp_wr is %d",
+ priv->device_attr.max_qp_wr);
+ DEBUG("priv->device_attr.max_sge is %d",
+ priv->device_attr.max_sge);
+#ifdef RSS_SUPPORT
+ if (priv->rss)
+ tmpl.qp = rxq_setup_qp_rss(priv, tmpl.cq, desc, parent);
+ else
+#endif /* RSS_SUPPORT */
+ tmpl.qp = rxq_setup_qp(priv, tmpl.cq, desc);
+ if (tmpl.qp == NULL) {
+ ret = (errno ? errno : EINVAL);
+ ERROR("%p: QP creation failure: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ mod = (struct ibv_exp_qp_attr){
+ /* Move the QP to this state. */
+ .qp_state = IBV_QPS_INIT,
+ /* Primary port number. */
+ .port_num = priv->port
+ };
+ ret = ibv_exp_modify_qp(tmpl.qp, &mod,
+ (IBV_EXP_QP_STATE |
+#ifdef RSS_SUPPORT
+ (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
+#endif /* RSS_SUPPORT */
+ IBV_EXP_QP_PORT));
+ if (ret) {
+ ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ if ((parent) || (!priv->rss)) {
+ /* Configure MAC and broadcast addresses. */
+ ret = rxq_mac_addrs_add(&tmpl);
+ if (ret) {
+ ERROR("%p: QP flow attachment failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ }
+ /* Allocate descriptors for RX queues, except for the RSS parent. */
+ if (parent)
+ goto skip_alloc;
+ if (tmpl.sp)
+ ret = rxq_alloc_elts_sp(&tmpl, desc, NULL);
+ else
+ ret = rxq_alloc_elts(&tmpl, desc, NULL);
+ if (ret) {
+ ERROR("%p: RXQ allocation failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ ret = ibv_post_recv(tmpl.qp,
+ (tmpl.sp ?
+ &(*tmpl.elts.sp)[0].wr :
+ &(*tmpl.elts.no_sp)[0].wr),
+ &bad_wr);
+ if (ret) {
+ ERROR("%p: ibv_post_recv() failed for WR %p: %s",
+ (void *)dev,
+ (void *)bad_wr,
+ strerror(ret));
+ goto error;
+ }
+skip_alloc:
+ mod = (struct ibv_exp_qp_attr){
+ .qp_state = IBV_QPS_RTR
+ };
+ ret = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
+ if (ret) {
+ ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
+ (void *)dev, strerror(ret));
+ goto error;
+ }
+ /* Save port ID. */
+ tmpl.port_id = dev->data->port_id;
+ DEBUG("%p: RTE port ID: %u", (void *)rxq, tmpl.port_id);
+ /* Clean up rxq in case we're reinitializing it. */
+ DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq);
+ rxq_cleanup(rxq);
+ *rxq = tmpl;
+ DEBUG("%p: rxq updated with %p", (void *)rxq, (void *)&tmpl);
+ assert(ret == 0);
+ return 0;
+error:
+ rxq_cleanup(&tmpl);
+ assert(ret > 0);
+ return ret;
+}
+
+/**
+ * DPDK callback to configure a RX queue.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param idx
+ * RX queue index.
+ * @param desc
+ * Number of descriptors to configure in queue.
+ * @param socket
+ * NUMA socket on which memory must be allocated.
+ * @param[in] conf
+ * Thresholds parameters.
+ * @param mp
+ * Memory pool for buffer allocations.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
+ unsigned int socket, const struct rte_eth_rxconf *conf,
+ struct rte_mempool *mp)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct rxq *rxq = (*priv->rxqs)[idx];
+ int ret;
+
+ priv_lock(priv);
+ DEBUG("%p: configuring queue %u for %u descriptors",
+ (void *)dev, idx, desc);
+ if (idx >= priv->rxqs_n) {
+ ERROR("%p: queue index out of range (%u >= %u)",
+ (void *)dev, idx, priv->rxqs_n);
+ priv_unlock(priv);
+ return -EOVERFLOW;
+ }
+ if (rxq != NULL) {
+ DEBUG("%p: reusing already allocated queue index %u (%p)",
+ (void *)dev, idx, (void *)rxq);
+ if (priv->started) {
+ priv_unlock(priv);
+ return -EEXIST;
+ }
+ (*priv->rxqs)[idx] = NULL;
+ rxq_cleanup(rxq);
+ } else {
+ rxq = rte_calloc_socket("RXQ", 1, sizeof(*rxq), 0, socket);
+ if (rxq == NULL) {
+ ERROR("%p: unable to allocate queue index %u",
+ (void *)dev, idx);
+ priv_unlock(priv);
+ return -ENOMEM;
+ }
+ }
+ ret = rxq_setup(dev, rxq, desc, socket, conf, mp);
+ if (ret)
+ rte_free(rxq);
+ else {
+ rxq->stats.idx = idx;
+ DEBUG("%p: adding RX queue %p to list",
+ (void *)dev, (void *)rxq);
+ (*priv->rxqs)[idx] = rxq;
+ /* Update receive callback. */
+ if (rxq->sp)
+ dev->rx_pkt_burst = mlx4_rx_burst_sp;
+ else
+ dev->rx_pkt_burst = mlx4_rx_burst;
+ }
+ priv_unlock(priv);
+ return -ret;
+}
+
+/**
+ * DPDK callback to release a RX queue.
+ *
+ * @param dpdk_rxq
+ * Generic RX queue pointer.
+ */
+static void
+mlx4_rx_queue_release(void *dpdk_rxq)
+{
+ struct rxq *rxq = (struct rxq *)dpdk_rxq;
+ struct priv *priv;
+ unsigned int i;
+
+ if (rxq == NULL)
+ return;
+ priv = rxq->priv;
+ priv_lock(priv);
+ assert(rxq != &priv->rxq_parent);
+ for (i = 0; (i != priv->rxqs_n); ++i)
+ if ((*priv->rxqs)[i] == rxq) {
+ DEBUG("%p: removing RX queue %p from list",
+ (void *)priv->dev, (void *)rxq);
+ (*priv->rxqs)[i] = NULL;
+ break;
+ }
+ rxq_cleanup(rxq);
+ rte_free(rxq);
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to start the device.
+ *
+ * Simulate device start by attaching all configured flows.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_dev_start(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i = 0;
+ unsigned int r;
+ struct rxq *rxq;
+
+ priv_lock(priv);
+ if (priv->started) {
+ priv_unlock(priv);
+ return 0;
+ }
+ DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
+ priv->started = 1;
+ if (priv->rss) {
+ rxq = &priv->rxq_parent;
+ r = 1;
+ } else {
+ rxq = (*priv->rxqs)[0];
+ r = priv->rxqs_n;
+ }
+ /* Iterate only once when RSS is enabled. */
+ do {
+ int ret;
+
+ /* Ignore nonexistent RX queues. */
+ if (rxq == NULL)
+ continue;
+ ret = rxq_mac_addrs_add(rxq);
+ if (!ret && priv->promisc)
+ ret = rxq_promiscuous_enable(rxq);
+ if (!ret && priv->allmulti)
+ ret = rxq_allmulticast_enable(rxq);
+ if (!ret)
+ continue;
+ WARN("%p: QP flow attachment failed: %s",
+ (void *)dev, strerror(ret));
+ /* Rollback. */
+ while (i != 0) {
+ rxq = (*priv->rxqs)[--i];
+ if (rxq != NULL) {
+ rxq_allmulticast_disable(rxq);
+ rxq_promiscuous_disable(rxq);
+ rxq_mac_addrs_del(rxq);
+ }
+ }
+ priv->started = 0;
+ return -ret;
+ } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
+ priv_unlock(priv);
+ return 0;
+}
+
+/**
+ * DPDK callback to stop the device.
+ *
+ * Simulate device stop by detaching all configured flows.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ */
+static void
+mlx4_dev_stop(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i = 0;
+ unsigned int r;
+ struct rxq *rxq;
+
+ priv_lock(priv);
+ if (!priv->started) {
+ priv_unlock(priv);
+ return;
+ }
+ DEBUG("%p: detaching flows from all RX queues", (void *)dev);
+ priv->started = 0;
+ if (priv->rss) {
+ rxq = &priv->rxq_parent;
+ r = 1;
+ } else {
+ rxq = (*priv->rxqs)[0];
+ r = priv->rxqs_n;
+ }
+ /* Iterate only once when RSS is enabled. */
+ do {
+ /* Ignore nonexistent RX queues. */
+ if (rxq == NULL)
+ continue;
+ rxq_allmulticast_disable(rxq);
+ rxq_promiscuous_disable(rxq);
+ rxq_mac_addrs_del(rxq);
+ } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
+ priv_unlock(priv);
+}
+
+/**
+ * Dummy DPDK callback for TX.
+ *
+ * This function is used to temporarily replace the real callback during
+ * unsafe control operations on the queue, or in case of error.
+ *
+ * @param dpdk_txq
+ * Generic pointer to TX queue structure.
+ * @param[in] pkts
+ * Packets to transmit.
+ * @param pkts_n
+ * Number of packets in array.
+ *
+ * @return
+ * Number of packets successfully transmitted (<= pkts_n).
+ */
+static uint16_t
+removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
+{
+ (void)dpdk_txq;
+ (void)pkts;
+ (void)pkts_n;
+ return 0;
+}
+
+/**
+ * Dummy DPDK callback for RX.
+ *
+ * This function is used to temporarily replace the real callback during
+ * unsafe control operations on the queue, or in case of error.
+ *
+ * @param dpdk_rxq
+ * Generic pointer to RX queue structure.
+ * @param[out] pkts
+ * Array to store received packets.
+ * @param pkts_n
+ * Maximum number of packets in array.
+ *
+ * @return
+ * Number of packets successfully received (<= pkts_n).
+ */
+static uint16_t
+removed_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
+{
+ (void)dpdk_rxq;
+ (void)pkts;
+ (void)pkts_n;
+ return 0;
+}
+
+/**
+ * DPDK callback to close the device.
+ *
+ * Destroy all queues and objects, free memory.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ */
+static void
+mlx4_dev_close(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ void *tmp;
+ unsigned int i;
+
+ priv_lock(priv);
+ DEBUG("%p: closing device \"%s\"",
+ (void *)dev,
+ ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
+ /* Prevent crashes when queues are still in use. This is unfortunately
+ * still required for DPDK 1.3 because some programs (such as testpmd)
+ * never release them before closing the device. */
+ dev->rx_pkt_burst = removed_rx_burst;
+ dev->tx_pkt_burst = removed_tx_burst;
+ if (priv->rxqs != NULL) {
+ /* XXX race condition if mlx4_rx_burst() is still running. */
+ usleep(1000);
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ tmp = (*priv->rxqs)[i];
+ if (tmp == NULL)
+ continue;
+ (*priv->rxqs)[i] = NULL;
+ rxq_cleanup(tmp);
+ rte_free(tmp);
+ }
+ priv->rxqs_n = 0;
+ priv->rxqs = NULL;
+ }
+ if (priv->txqs != NULL) {
+ /* XXX race condition if mlx4_tx_burst() is still running. */
+ usleep(1000);
+ for (i = 0; (i != priv->txqs_n); ++i) {
+ tmp = (*priv->txqs)[i];
+ if (tmp == NULL)
+ continue;
+ (*priv->txqs)[i] = NULL;
+ txq_cleanup(tmp);
+ rte_free(tmp);
+ }
+ priv->txqs_n = 0;
+ priv->txqs = NULL;
+ }
+ if (priv->rss)
+ rxq_cleanup(&priv->rxq_parent);
+ if (priv->pd != NULL) {
+ assert(priv->ctx != NULL);
+ claim_zero(ibv_dealloc_pd(priv->pd));
+ claim_zero(ibv_close_device(priv->ctx));
+ } else
+ assert(priv->ctx == NULL);
+ priv_unlock(priv);
+ memset(priv, 0, sizeof(*priv));
+}
+
+/**
+ * DPDK callback to get information about the device.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param[out] info
+ * Info structure output buffer.
+ */
+static void
+mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int max;
+
+ priv_lock(priv);
+ /* FIXME: we should ask the device for these values. */
+ info->min_rx_bufsize = 32;
+ info->max_rx_pktlen = 65536;
+ /*
+ * Since we need one CQ per QP, the limit is the minimum number
+ * between the two values.
+ */
+ max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
+ priv->device_attr.max_qp : priv->device_attr.max_cq);
+ /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
+ if (max >= 65535)
+ max = 65535;
+ info->max_rx_queues = max;
+ info->max_tx_queues = max;
+ info->max_mac_addrs = elemof(priv->mac);
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to get device statistics.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param[out] stats
+ * Stats structure output buffer.
+ */
+static void
+mlx4_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct rte_eth_stats tmp = {0};
+ unsigned int i;
+ unsigned int idx;
+
+ priv_lock(priv);
+ /* Add software counters. */
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ struct rxq *rxq = (*priv->rxqs)[i];
+
+ if (rxq == NULL)
+ continue;
+ idx = rxq->stats.idx;
+ if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ tmp.q_ipackets[idx] += rxq->stats.ipackets;
+ tmp.q_ibytes[idx] += rxq->stats.ibytes;
+#endif
+ tmp.q_errors[idx] += (rxq->stats.idropped +
+ rxq->stats.rx_nombuf);
+ }
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ tmp.ipackets += rxq->stats.ipackets;
+ tmp.ibytes += rxq->stats.ibytes;
+#endif
+ tmp.ierrors += rxq->stats.idropped;
+ tmp.rx_nombuf += rxq->stats.rx_nombuf;
+ }
+ for (i = 0; (i != priv->txqs_n); ++i) {
+ struct txq *txq = (*priv->txqs)[i];
+
+ if (txq == NULL)
+ continue;
+ idx = txq->stats.idx;
+ if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ tmp.q_opackets[idx] += txq->stats.opackets;
+ tmp.q_obytes[idx] += txq->stats.obytes;
+#endif
+ tmp.q_errors[idx] += txq->stats.odropped;
+ }
+#ifdef MLX4_PMD_SOFT_COUNTERS
+ tmp.opackets += txq->stats.opackets;
+ tmp.obytes += txq->stats.obytes;
+#endif
+ tmp.oerrors += txq->stats.odropped;
+ }
+#ifndef MLX4_PMD_SOFT_COUNTERS
+ /* FIXME: retrieve and add hardware counters. */
+#endif
+ *stats = tmp;
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to clear device statistics.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ */
+static void
+mlx4_stats_reset(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i;
+ unsigned int idx;
+
+ priv_lock(priv);
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ if ((*priv->rxqs)[i] == NULL)
+ continue;
+ idx = (*priv->rxqs)[i]->stats.idx;
+ (*priv->rxqs)[i]->stats =
+ (struct mlx4_rxq_stats){ .idx = idx };
+ }
+ for (i = 0; (i != priv->txqs_n); ++i) {
+ if ((*priv->txqs)[i] == NULL)
+ continue;
+ idx = (*priv->rxqs)[i]->stats.idx;
+ (*priv->txqs)[i]->stats =
+ (struct mlx4_txq_stats){ .idx = idx };
+ }
+#ifndef MLX4_PMD_SOFT_COUNTERS
+ /* FIXME: reset hardware counters. */
+#endif
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to remove a MAC address.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param index
+ * MAC address index.
+ */
+static void
+mlx4_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
+{
+ struct priv *priv = dev->data->dev_private;
+
+ priv_lock(priv);
+ DEBUG("%p: removing MAC address from index %" PRIu32,
+ (void *)dev, index);
+ if (index >= MLX4_MAX_MAC_ADDRESSES)
+ goto end;
+ /* Refuse to remove the broadcast address, this one is special. */
+ if (!memcmp(priv->mac[index].addr_bytes, "\xff\xff\xff\xff\xff\xff",
+ ETHER_ADDR_LEN))
+ goto end;
+ priv_mac_addr_del(priv, index);
+end:
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to add a MAC address.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param mac_addr
+ * MAC address to register.
+ * @param index
+ * MAC address index.
+ * @param vmdq
+ * VMDq pool index to associate address with (ignored).
+ */
+static void
+mlx4_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
+ uint32_t index, uint32_t vmdq)
+{
+ struct priv *priv = dev->data->dev_private;
+
+ (void)vmdq;
+ priv_lock(priv);
+ DEBUG("%p: adding MAC address at index %" PRIu32,
+ (void *)dev, index);
+ if (index >= MLX4_MAX_MAC_ADDRESSES)
+ goto end;
+ /* Refuse to add the broadcast address, this one is special. */
+ if (!memcmp(mac_addr->addr_bytes, "\xff\xff\xff\xff\xff\xff",
+ ETHER_ADDR_LEN))
+ goto end;
+ priv_mac_addr_add(priv, index,
+ (const uint8_t (*)[ETHER_ADDR_LEN])
+ mac_addr->addr_bytes);
+end:
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to enable promiscuous mode.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ */
+static void
+mlx4_promiscuous_enable(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i;
+ int ret;
+
+ priv_lock(priv);
+ if (priv->promisc) {
+ priv_unlock(priv);
+ return;
+ }
+ /* If device isn't started, this is all we need to do. */
+ if (!priv->started)
+ goto end;
+ if (priv->rss) {
+ ret = rxq_promiscuous_enable(&priv->rxq_parent);
+ if (ret) {
+ priv_unlock(priv);
+ return;
+ }
+ goto end;
+ }
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ if ((*priv->rxqs)[i] == NULL)
+ continue;
+ ret = rxq_promiscuous_enable((*priv->rxqs)[i]);
+ if (!ret)
+ continue;
+ /* Failure, rollback. */
+ while (i != 0)
+ if ((*priv->rxqs)[--i] != NULL)
+ rxq_promiscuous_disable((*priv->rxqs)[i]);
+ priv_unlock(priv);
+ return;
+ }
+end:
+ priv->promisc = 1;
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to disable promiscuous mode.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ */
+static void
+mlx4_promiscuous_disable(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i;
+
+ priv_lock(priv);
+ if (!priv->promisc) {
+ priv_unlock(priv);
+ return;
+ }
+ if (priv->rss) {
+ rxq_promiscuous_disable(&priv->rxq_parent);
+ goto end;
+ }
+ for (i = 0; (i != priv->rxqs_n); ++i)
+ if ((*priv->rxqs)[i] != NULL)
+ rxq_promiscuous_disable((*priv->rxqs)[i]);
+end:
+ priv->promisc = 0;
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to enable allmulti mode.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ */
+static void
+mlx4_allmulticast_enable(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i;
+ int ret;
+
+ priv_lock(priv);
+ if (priv->allmulti) {
+ priv_unlock(priv);
+ return;
+ }
+ /* If device isn't started, this is all we need to do. */
+ if (!priv->started)
+ goto end;
+ if (priv->rss) {
+ ret = rxq_allmulticast_enable(&priv->rxq_parent);
+ if (ret) {
+ priv_unlock(priv);
+ return;
+ }
+ goto end;
+ }
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ if ((*priv->rxqs)[i] == NULL)
+ continue;
+ ret = rxq_allmulticast_enable((*priv->rxqs)[i]);
+ if (!ret)
+ continue;
+ /* Failure, rollback. */
+ while (i != 0)
+ if ((*priv->rxqs)[--i] != NULL)
+ rxq_allmulticast_disable((*priv->rxqs)[i]);
+ priv_unlock(priv);
+ return;
+ }
+end:
+ priv->allmulti = 1;
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to disable allmulti mode.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ */
+static void
+mlx4_allmulticast_disable(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i;
+
+ priv_lock(priv);
+ if (!priv->allmulti) {
+ priv_unlock(priv);
+ return;
+ }
+ if (priv->rss) {
+ rxq_allmulticast_disable(&priv->rxq_parent);
+ goto end;
+ }
+ for (i = 0; (i != priv->rxqs_n); ++i)
+ if ((*priv->rxqs)[i] != NULL)
+ rxq_allmulticast_disable((*priv->rxqs)[i]);
+end:
+ priv->allmulti = 0;
+ priv_unlock(priv);
+}
+
+/**
+ * DPDK callback to retrieve physical link information (unlocked version).
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param wait_to_complete
+ * Wait for request completion (ignored).
+ */
+static int
+mlx4_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct ibv_port_attr port_attr;
+ static const uint8_t width_mult[] = {
+ /* Multiplier values taken from devinfo.c in libibverbs. */
+ 0, 1, 4, 0, 8, 0, 0, 0, 12, 0
+ };
+
+ (void)wait_to_complete;
+ errno = ibv_query_port(priv->ctx, priv->port, &port_attr);
+ if (errno) {
+ WARN("port query failed: %s", strerror(errno));
+ return -1;
+ }
+ dev->data->dev_link = (struct rte_eth_link){
+ .link_speed = (ibv_rate_to_mbps(mult_to_ibv_rate
+ (port_attr.active_speed)) *
+ width_mult[(port_attr.active_width %
+ sizeof(width_mult))]),
+ .link_duplex = ETH_LINK_FULL_DUPLEX,
+ .link_status = (port_attr.state == IBV_PORT_ACTIVE)
+ };
+ if (memcmp(&port_attr, &priv->port_attr, sizeof(port_attr))) {
+ /* Link status changed. */
+ priv->port_attr = port_attr;
+ return 0;
+ }
+ /* Link status is still the same. */
+ return -1;
+}
+
+/**
+ * DPDK callback to retrieve physical link information.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param wait_to_complete
+ * Wait for request completion (ignored).
+ */
+static int
+mlx4_link_update(struct rte_eth_dev *dev, int wait_to_complete)
+{
+ struct priv *priv = dev->data->dev_private;
+ int ret;
+
+ priv_lock(priv);
+ ret = mlx4_link_update_unlocked(dev, wait_to_complete);
+ priv_unlock(priv);
+ return ret;
+}
+
+/**
+ * DPDK callback to change the MTU.
+ *
+ * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be
+ * received). Use this as a hint to enable/disable scattered packets support
+ * and improve performance when not needed.
+ * Since failure is not an option, reconfiguring queues on the fly is not
+ * recommended.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param in_mtu
+ * New MTU.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
+{
+ struct priv *priv = dev->data->dev_private;
+ int ret = 0;
+ unsigned int i;
+ uint16_t (*rx_func)(void *, struct rte_mbuf **, uint16_t) =
+ mlx4_rx_burst;
+
+ priv_lock(priv);
+ /* Set kernel interface MTU first. */
+ if (priv_set_mtu(priv, mtu)) {
+ ret = errno;
+ WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
+ strerror(ret));
+ goto out;
+ } else
+ DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
+ priv->mtu = mtu;
+ /* Temporarily replace RX handler with a fake one, assuming it has not
+ * been copied elsewhere. */
+ dev->rx_pkt_burst = removed_rx_burst;
+ /* Make sure everyone has left mlx4_rx_burst() and uses
+ * removed_rx_burst() instead. */
+ rte_wmb();
+ usleep(1000);
+ /* Reconfigure each RX queue. */
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ struct rxq *rxq = (*priv->rxqs)[i];
+ unsigned int max_frame_len;
+ int sp;
+
+ if (rxq == NULL)
+ continue;
+ /* Calculate new maximum frame length according to MTU and
+ * toggle scattered support (sp) if necessary. */
+ max_frame_len = (priv->mtu + ETHER_HDR_LEN +
+ (ETHER_MAX_VLAN_FRAME_LEN - ETHER_MAX_LEN));
+ sp = (max_frame_len > (rxq->mb_len - RTE_PKTMBUF_HEADROOM));
+ /* Provide new values to rxq_setup(). */
+ dev->data->dev_conf.rxmode.jumbo_frame = sp;
+ dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame_len;
+ ret = rxq_rehash(dev, rxq);
+ if (ret) {
+ /* Force SP RX if that queue requires it and abort. */
+ if (rxq->sp)
+ rx_func = mlx4_rx_burst_sp;
+ break;
+ }
+ /* Reenable non-RSS queue attributes. No need to check
+ * for errors at this stage. */
+ if (!priv->rss) {
+ rxq_mac_addrs_add(rxq);
+ if (priv->promisc)
+ rxq_promiscuous_enable(rxq);
+ if (priv->allmulti)
+ rxq_allmulticast_enable(rxq);
+ }
+ /* Scattered burst function takes priority. */
+ if (rxq->sp)
+ rx_func = mlx4_rx_burst_sp;
+ }
+ /* Burst functions can now be called again. */
+ rte_wmb();
+ dev->rx_pkt_burst = rx_func;
+out:
+ priv_unlock(priv);
+ assert(ret >= 0);
+ return -ret;
+}
+
+/**
+ * DPDK callback to get flow control status.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param[out] fc_conf
+ * Flow control output buffer.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct ifreq ifr;
+ struct ethtool_pauseparam ethpause = {
+ .cmd = ETHTOOL_GPAUSEPARAM
+ };
+ int ret;
+
+ ifr.ifr_data = ðpause;
+ priv_lock(priv);
+ if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
+ ret = errno;
+ WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
+ " failed: %s",
+ strerror(ret));
+ goto out;
+ }
+
+ fc_conf->autoneg = ethpause.autoneg;
+ if (ethpause.rx_pause && ethpause.tx_pause)
+ fc_conf->mode = RTE_FC_FULL;
+ else if (ethpause.rx_pause)
+ fc_conf->mode = RTE_FC_RX_PAUSE;
+ else if (ethpause.tx_pause)
+ fc_conf->mode = RTE_FC_TX_PAUSE;
+ else
+ fc_conf->mode = RTE_FC_NONE;
+ ret = 0;
+
+out:
+ priv_unlock(priv);
+ assert(ret >= 0);
+ return -ret;
+}
+
+/**
+ * DPDK callback to modify flow control parameters.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param[in] fc_conf
+ * Flow control parameters.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct ifreq ifr;
+ struct ethtool_pauseparam ethpause = {
+ .cmd = ETHTOOL_SPAUSEPARAM
+ };
+ int ret;
+
+ ifr.ifr_data = ðpause;
+ ethpause.autoneg = fc_conf->autoneg;
+ if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
+ (fc_conf->mode & RTE_FC_RX_PAUSE))
+ ethpause.rx_pause = 1;
+ else
+ ethpause.rx_pause = 0;
+
+ if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
+ (fc_conf->mode & RTE_FC_TX_PAUSE))
+ ethpause.tx_pause = 1;
+ else
+ ethpause.tx_pause = 0;
+
+ priv_lock(priv);
+ if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
+ ret = errno;
+ WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
+ " failed: %s",
+ strerror(ret));
+ goto out;
+ }
+ ret = 0;
+
+out:
+ priv_unlock(priv);
+ assert(ret >= 0);
+ return -ret;
+}
+
+/**
+ * Configure a VLAN filter.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param vlan_id
+ * VLAN ID to filter.
+ * @param on
+ * Toggle filter.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+{
+ struct priv *priv = dev->data->dev_private;
+ unsigned int i;
+ unsigned int j = -1;
+
+ DEBUG("%p: %s VLAN filter ID %" PRIu16,
+ (void *)dev, (on ? "enable" : "disable"), vlan_id);
+ for (i = 0; (i != elemof(priv->vlan_filter)); ++i) {
+ if (!priv->vlan_filter[i].enabled) {
+ /* Unused index, remember it. */
+ j = i;
+ continue;
+ }
+ if (priv->vlan_filter[i].id != vlan_id)
+ continue;
+ /* This VLAN ID is already known, use its index. */
+ j = i;
+ break;
+ }
+ /* Check if there's room for another VLAN filter. */
+ if (j == (unsigned int)-1)
+ return ENOMEM;
+ /*
+ * VLAN filters apply to all configured MAC addresses, flow
+ * specifications must be reconfigured accordingly.
+ */
+ priv->vlan_filter[j].id = vlan_id;
+ if ((on) && (!priv->vlan_filter[j].enabled)) {
+ /*
+ * Filter is disabled, enable it.
+ * Rehashing flows in all RX queues is necessary.
+ */
+ if (priv->rss)
+ rxq_mac_addrs_del(&priv->rxq_parent);
+ else
+ for (i = 0; (i != priv->rxqs_n); ++i)
+ if ((*priv->rxqs)[i] != NULL)
+ rxq_mac_addrs_del((*priv->rxqs)[i]);
+ priv->vlan_filter[j].enabled = 1;
+ if (priv->started) {
+ if (priv->rss)
+ rxq_mac_addrs_add(&priv->rxq_parent);
+ else
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ if ((*priv->rxqs)[i] == NULL)
+ continue;
+ rxq_mac_addrs_add((*priv->rxqs)[i]);
+ }
+ }
+ } else if ((!on) && (priv->vlan_filter[j].enabled)) {
+ /*
+ * Filter is enabled, disable it.
+ * Rehashing flows in all RX queues is necessary.
+ */
+ if (priv->rss)
+ rxq_mac_addrs_del(&priv->rxq_parent);
+ else
+ for (i = 0; (i != priv->rxqs_n); ++i)
+ if ((*priv->rxqs)[i] != NULL)
+ rxq_mac_addrs_del((*priv->rxqs)[i]);
+ priv->vlan_filter[j].enabled = 0;
+ if (priv->started) {
+ if (priv->rss)
+ rxq_mac_addrs_add(&priv->rxq_parent);
+ else
+ for (i = 0; (i != priv->rxqs_n); ++i) {
+ if ((*priv->rxqs)[i] == NULL)
+ continue;
+ rxq_mac_addrs_add((*priv->rxqs)[i]);
+ }
+ }
+ }
+ return 0;
+}
+
+/**
+ * DPDK callback to configure a VLAN filter.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param vlan_id
+ * VLAN ID to filter.
+ * @param on
+ * Toggle filter.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+{
+ struct priv *priv = dev->data->dev_private;
+ int ret;
+
+ priv_lock(priv);
+ ret = vlan_filter_set(dev, vlan_id, on);
+ priv_unlock(priv);
+ assert(ret >= 0);
+ return -ret;
+}
+
+static const struct eth_dev_ops mlx4_dev_ops = {
+ .dev_configure = mlx4_dev_configure,
+ .dev_start = mlx4_dev_start,
+ .dev_stop = mlx4_dev_stop,
+ .dev_close = mlx4_dev_close,
+ .promiscuous_enable = mlx4_promiscuous_enable,
+ .promiscuous_disable = mlx4_promiscuous_disable,
+ .allmulticast_enable = mlx4_allmulticast_enable,
+ .allmulticast_disable = mlx4_allmulticast_disable,
+ .link_update = mlx4_link_update,
+ .stats_get = mlx4_stats_get,
+ .stats_reset = mlx4_stats_reset,
+ .queue_stats_mapping_set = NULL,
+ .dev_infos_get = mlx4_dev_infos_get,
+ .vlan_filter_set = mlx4_vlan_filter_set,
+ .vlan_tpid_set = NULL,
+ .vlan_strip_queue_set = NULL,
+ .vlan_offload_set = NULL,
+ .rx_queue_setup = mlx4_rx_queue_setup,
+ .tx_queue_setup = mlx4_tx_queue_setup,
+ .rx_queue_release = mlx4_rx_queue_release,
+ .tx_queue_release = mlx4_tx_queue_release,
+ .dev_led_on = NULL,
+ .dev_led_off = NULL,
+ .flow_ctrl_get = mlx4_dev_get_flow_ctrl,
+ .flow_ctrl_set = mlx4_dev_set_flow_ctrl,
+ .priority_flow_ctrl_set = NULL,
+ .mac_addr_remove = mlx4_mac_addr_remove,
+ .mac_addr_add = mlx4_mac_addr_add,
+ .mtu_set = mlx4_dev_set_mtu,
+ .fdir_add_signature_filter = NULL,
+ .fdir_update_signature_filter = NULL,
+ .fdir_remove_signature_filter = NULL,
+ .fdir_add_perfect_filter = NULL,
+ .fdir_update_perfect_filter = NULL,
+ .fdir_remove_perfect_filter = NULL,
+ .fdir_set_masks = NULL
+};
+
+/**
+ * Get PCI information from struct ibv_device.
+ *
+ * @param device
+ * Pointer to Ethernet device structure.
+ * @param[out] pci_addr
+ * PCI bus address output buffer.
+ *
+ * @return
+ * 0 on success, -1 on failure and errno is set.
+ */
+static int
+mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
+ struct rte_pci_addr *pci_addr)
+{
+ FILE *file;
+ char line[32];
+ MKSTR(path, "%s/device/uevent", device->ibdev_path);
+
+ file = fopen(path, "rb");
+ if (file == NULL)
+ return -1;
+ while (fgets(line, sizeof(line), file) == line) {
+ size_t len = strlen(line);
+ int ret;
+
+ /* Truncate long lines. */
+ if (len == (sizeof(line) - 1))
+ while (line[(len - 1)] != '\n') {
+ ret = fgetc(file);
+ if (ret == EOF)
+ break;
+ line[(len - 1)] = ret;
+ }
+ /* Extract information. */
+ if (sscanf(line,
+ "PCI_SLOT_NAME="
+ "%" SCNx16 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
+ &pci_addr->domain,
+ &pci_addr->bus,
+ &pci_addr->devid,
+ &pci_addr->function) == 4) {
+ ret = 0;
+ break;
+ }
+ }
+ fclose(file);
+ return 0;
+}
+
+/**
+ * Derive MAC address from port GID.
+ *
+ * @param[out] mac
+ * MAC address output buffer.
+ * @param port
+ * Physical port number.
+ * @param[in] gid
+ * Port GID.
+ */
+static void
+mac_from_gid(uint8_t (*mac)[ETHER_ADDR_LEN], uint32_t port, uint8_t *gid)
+{
+ memcpy(&(*mac)[0], gid + 8, 3);
+ memcpy(&(*mac)[3], gid + 13, 3);
+ if (port == 1)
+ (*mac)[0] ^= 2;
+}
+
+/* Support up to 32 adapters. */
+static struct {
+ struct rte_pci_addr pci_addr; /* associated PCI address */
+ uint32_t ports; /* physical ports bitfield. */
+} mlx4_dev[32];
+
+/**
+ * Get device index in mlx4_dev[] from PCI bus address.
+ *
+ * @param[in] pci_addr
+ * PCI bus address to look for.
+ *
+ * @return
+ * mlx4_dev[] index on success, -1 on failure.
+ */
+static int
+mlx4_dev_idx(struct rte_pci_addr *pci_addr)
+{
+ unsigned int i;
+ int ret = -1;
+
+ assert(pci_addr != NULL);
+ for (i = 0; (i != elemof(mlx4_dev)); ++i) {
+ if ((mlx4_dev[i].pci_addr.domain == pci_addr->domain) &&
+ (mlx4_dev[i].pci_addr.bus == pci_addr->bus) &&
+ (mlx4_dev[i].pci_addr.devid == pci_addr->devid) &&
+ (mlx4_dev[i].pci_addr.function == pci_addr->function))
+ return i;
+ if ((mlx4_dev[i].ports == 0) && (ret == -1))
+ ret = i;
+ }
+ return ret;
+}
+
+/**
+ * Retrieve integer value from environment variable.
+ *
+ * @param[in] name
+ * Environment variable name.
+ *
+ * @return
+ * Integer value, 0 if the variable is not set.
+ */
+static int
+mlx4_getenv_int(const char *name)
+{
+ const char *val = getenv(name);
+
+ if (val == NULL)
+ return 0;
+ return atoi(val);
+}
+
+static struct eth_driver mlx4_driver;
+
+/**
+ * DPDK callback to register a PCI device.
+ *
+ * This function creates an Ethernet device for each port of a given
+ * PCI device.
+ *
+ * @param[in] pci_drv
+ * PCI driver structure (mlx4_driver).
+ * @param[in] pci_dev
+ * PCI device information.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+static int
+mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
+{
+ struct ibv_device **list;
+ struct ibv_device *ibv_dev;
+ int err = 0;
+ struct ibv_context *attr_ctx = NULL;
+ struct ibv_device_attr device_attr;
+ unsigned int vf;
+ int idx;
+ int i;
+
+ (void)pci_drv;
+ assert(pci_drv == &mlx4_driver.pci_drv);
+ /* Get mlx4_dev[] index. */
+ idx = mlx4_dev_idx(&pci_dev->addr);
+ if (idx == -1) {
+ ERROR("this driver cannot support any more adapters");
+ return -ENOMEM;
+ }
+ DEBUG("using driver device index %d", idx);
+
+ /* Save PCI address. */
+ mlx4_dev[idx].pci_addr = pci_dev->addr;
+ list = ibv_get_device_list(&i);
+ if (list == NULL) {
+ assert(errno);
+ if (errno == ENOSYS) {
+ WARN("cannot list devices, is ib_uverbs loaded?");
+ return 0;
+ }
+ return -errno;
+ }
+ assert(i >= 0);
+ /*
+ * For each listed device, check related sysfs entry against
+ * the provided PCI ID.
+ */
+ while (i != 0) {
+ struct rte_pci_addr pci_addr;
+
+ --i;
+ DEBUG("checking device \"%s\"", list[i]->name);
+ if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
+ continue;
+ if ((pci_dev->addr.domain != pci_addr.domain) ||
+ (pci_dev->addr.bus != pci_addr.bus) ||
+ (pci_dev->addr.devid != pci_addr.devid) ||
+ (pci_dev->addr.function != pci_addr.function))
+ continue;
+ vf = (pci_dev->id.device_id ==
+ PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
+ INFO("PCI information matches, using device \"%s\" (VF: %s)",
+ list[i]->name, (vf ? "true" : "false"));
+ attr_ctx = ibv_open_device(list[i]);
+ err = errno;
+ break;
+ }
+ if (attr_ctx == NULL) {
+ ibv_free_device_list(list);
+ switch (err) {
+ case 0:
+ WARN("cannot access device, is mlx4_ib loaded?");
+ return 0;
+ case EINVAL:
+ WARN("cannot use device, are drivers up to date?");
+ return 0;
+ }
+ assert(err > 0);
+ return -err;
+ }
+ ibv_dev = list[i];
+
+ DEBUG("device opened");
+ if (ibv_query_device(attr_ctx, &device_attr))
+ goto error;
+ INFO("%u port(s) detected", device_attr.phys_port_cnt);
+
+ for (i = 0; i < device_attr.phys_port_cnt; i++) {
+ uint32_t port = i + 1; /* ports are indexed from one */
+ uint32_t test = (1 << i);
+ struct ibv_context *ctx = NULL;
+ struct ibv_port_attr port_attr;
+ struct ibv_pd *pd = NULL;
+ struct priv *priv = NULL;
+ struct rte_eth_dev *eth_dev;
+#if defined(INLINE_RECV) || defined(RSS_SUPPORT)
+ struct ibv_exp_device_attr exp_device_attr;
+#endif
+ struct ether_addr mac;
+ union ibv_gid temp_gid;
+
+#ifdef RSS_SUPPORT
+ exp_device_attr.comp_mask =
+ (IBV_EXP_DEVICE_ATTR_EXP_CAP_FLAGS |
+ IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ);
+#endif /* RSS_SUPPORT */
+
+ DEBUG("using port %u (%08" PRIx32 ")", port, test);
+
+ ctx = ibv_open_device(ibv_dev);
+ if (ctx == NULL)
+ goto port_error;
+
+ /* Check port status. */
+ err = ibv_query_port(ctx, port, &port_attr);
+ if (err) {
+ ERROR("port query failed: %s", strerror(err));
+ goto port_error;
+ }
+ if (port_attr.state != IBV_PORT_ACTIVE)
+ WARN("bad state for port %d: \"%s\" (%d)",
+ port, ibv_port_state_str(port_attr.state),
+ port_attr.state);
+
+ /* Allocate protection domain. */
+ pd = ibv_alloc_pd(ctx);
+ if (pd == NULL) {
+ ERROR("PD allocation failure");
+ err = ENOMEM;
+ goto port_error;
+ }
+
+ mlx4_dev[idx].ports |= test;
+
+ /* from rte_ethdev.c */
+ priv = rte_zmalloc("ethdev private structure",
+ sizeof(*priv),
+ RTE_CACHE_LINE_SIZE);
+ if (priv == NULL) {
+ ERROR("priv allocation failure");
+ err = ENOMEM;
+ goto port_error;
+ }
+
+ priv->ctx = ctx;
+ priv->device_attr = device_attr;
+ priv->port_attr = port_attr;
+ priv->port = port;
+ priv->pd = pd;
+ priv->mtu = ETHER_MTU;
+#ifdef RSS_SUPPORT
+ if (ibv_exp_query_device(ctx, &exp_device_attr)) {
+ INFO("experimental ibv_exp_query_device");
+ goto port_error;
+ }
+ if ((exp_device_attr.exp_device_cap_flags &
+ IBV_EXP_DEVICE_QPG) &&
+ (exp_device_attr.exp_device_cap_flags &
+ IBV_EXP_DEVICE_UD_RSS) &&
+ (exp_device_attr.comp_mask &
+ IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ) &&
+ (exp_device_attr.max_rss_tbl_sz > 0)) {
+ priv->hw_qpg = 1;
+ priv->hw_rss = 1;
+ priv->max_rss_tbl_sz = exp_device_attr.max_rss_tbl_sz;
+ } else {
+ priv->hw_qpg = 0;
+ priv->hw_rss = 0;
+ priv->max_rss_tbl_sz = 0;
+ }
+ priv->hw_tss = !!(exp_device_attr.exp_device_cap_flags &
+ IBV_EXP_DEVICE_UD_TSS);
+ DEBUG("device flags: %s%s%s",
+ (priv->hw_qpg ? "IBV_DEVICE_QPG " : ""),
+ (priv->hw_tss ? "IBV_DEVICE_TSS " : ""),
+ (priv->hw_rss ? "IBV_DEVICE_RSS " : ""));
+ if (priv->hw_rss)
+ DEBUG("maximum RSS indirection table size: %u",
+ exp_device_attr.max_rss_tbl_sz);
+#endif /* RSS_SUPPORT */
+
+#ifdef INLINE_RECV
+ priv->inl_recv_size = mlx4_getenv_int("MLX4_INLINE_RECV_SIZE");
+
+ if (priv->inl_recv_size) {
+ exp_device_attr.comp_mask =
+ IBV_EXP_DEVICE_ATTR_INLINE_RECV_SZ;
+ if (ibv_exp_query_device(ctx, &exp_device_attr)) {
+ INFO("Couldn't query device for inline-receive"
+ " capabilities.");
+ priv->inl_recv_size = 0;
+ } else {
+ if ((unsigned)exp_device_attr.inline_recv_sz <
+ priv->inl_recv_size) {
+ INFO("Max inline-receive (%d) <"
+ " requested inline-receive (%u)",
+ exp_device_attr.inline_recv_sz,
+ priv->inl_recv_size);
+ priv->inl_recv_size =
+ exp_device_attr.inline_recv_sz;
+ }
+ }
+ INFO("Set inline receive size to %u",
+ priv->inl_recv_size);
+ }
+#endif /* INLINE_RECV */
+
+ (void)mlx4_getenv_int;
+ priv->vf = vf;
+ if (ibv_query_gid(ctx, port, 0, &temp_gid)) {
+ ERROR("ibv_query_gid() failure");
+ goto port_error;
+ }
+ /* Configure the first MAC address by default. */
+ mac_from_gid(&mac.addr_bytes, port, temp_gid.raw);
+ INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
+ priv->port,
+ mac.addr_bytes[0], mac.addr_bytes[1],
+ mac.addr_bytes[2], mac.addr_bytes[3],
+ mac.addr_bytes[4], mac.addr_bytes[5]);
+ /* Register MAC and broadcast addresses. */
+ claim_zero(priv_mac_addr_add(priv, 0,
+ (const uint8_t (*)[ETHER_ADDR_LEN])
+ mac.addr_bytes));
+ claim_zero(priv_mac_addr_add(priv, 1,
+ &(const uint8_t [ETHER_ADDR_LEN])
+ { "\xff\xff\xff\xff\xff\xff" }));
+#ifndef NDEBUG
+ {
+ char ifname[IF_NAMESIZE];
+
+ if (priv_get_ifname(priv, &ifname) == 0)
+ DEBUG("port %u ifname is \"%s\"",
+ priv->port, ifname);
+ else
+ DEBUG("port %u ifname is unknown", priv->port);
+ }
+#endif
+ /* Get actual MTU if possible. */
+ priv_get_mtu(priv, &priv->mtu);
+ DEBUG("port %u MTU is %u", priv->port, priv->mtu);
+
+ /* from rte_ethdev.c */
+ {
+ char name[RTE_ETH_NAME_MAX_LEN];
+
+ snprintf(name, sizeof(name), "%s port %u",
+ ibv_get_device_name(ibv_dev), port);
+ eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_PCI);
+ }
+ if (eth_dev == NULL) {
+ ERROR("can not allocate rte ethdev");
+ err = ENOMEM;
+ goto port_error;
+ }
+
+ eth_dev->data->dev_private = priv;
+ eth_dev->pci_dev = pci_dev;
+ eth_dev->driver = &mlx4_driver;
+ eth_dev->data->rx_mbuf_alloc_failed = 0;
+ eth_dev->data->mtu = ETHER_MTU;
+
+ priv->dev = eth_dev;
+ eth_dev->dev_ops = &mlx4_dev_ops;
+ eth_dev->data->mac_addrs = priv->mac;
+
+ /* Bring Ethernet device up. */
+ DEBUG("forcing Ethernet interface up");
+ priv_set_flags(priv, ~IFF_UP, IFF_UP);
+ continue;
+
+port_error:
+ rte_free(priv);
+ if (pd)
+ claim_zero(ibv_dealloc_pd(pd));
+ if (ctx)
+ claim_zero(ibv_close_device(ctx));
+ break;
+ }
+
+ /*
+ * XXX if something went wrong in the loop above, there is a resource
+ * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
+ * long as the dpdk does not provide a way to deallocate a ethdev and a
+ * way to enumerate the registered ethdevs to free the previous ones.
+ */
+
+ /* no port found, complain */
+ if (!mlx4_dev[idx].ports) {
+ err = ENODEV;
+ goto error;
+ }
+
+error:
+ if (attr_ctx)
+ claim_zero(ibv_close_device(attr_ctx));
+ if (list)
+ ibv_free_device_list(list);
+ assert(err >= 0);
+ return -err;
+}
+
+static const struct rte_pci_id mlx4_pci_id_map[] = {
+ {
+ .vendor_id = PCI_VENDOR_ID_MELLANOX,
+ .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3,
+ .subsystem_vendor_id = PCI_ANY_ID,
+ .subsystem_device_id = PCI_ANY_ID
+ },
+ {
+ .vendor_id = PCI_VENDOR_ID_MELLANOX,
+ .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO,
+ .subsystem_vendor_id = PCI_ANY_ID,
+ .subsystem_device_id = PCI_ANY_ID
+ },
+ {
+ .vendor_id = PCI_VENDOR_ID_MELLANOX,
+ .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3VF,
+ .subsystem_vendor_id = PCI_ANY_ID,
+ .subsystem_device_id = PCI_ANY_ID
+ },
+ {
+ .vendor_id = 0
+ }
+};
+
+static struct eth_driver mlx4_driver = {
+ .pci_drv = {
+ .name = MLX4_DRIVER_NAME,
+ .id_table = mlx4_pci_id_map,
+ .devinit = mlx4_pci_devinit,
+ },
+ .dev_private_size = sizeof(struct priv)
+};
+
+/**
+ * Driver initialization routine.
+ */
+static int
+rte_mlx4_pmd_init(const char *name, const char *args)
+{
+ (void)name;
+ (void)args;
+ rte_eal_pci_register(&mlx4_driver.pci_drv);
+ return 0;
+}
+
+static struct rte_driver rte_mlx4_driver = {
+ .type = PMD_PDEV,
+ .name = MLX4_DRIVER_NAME,
+ .init = rte_mlx4_pmd_init,
+};
+
+PMD_REGISTER_DRIVER(rte_mlx4_driver)
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright 2012-2015 6WIND S.A.
+ * Copyright 2012 Mellanox.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of 6WIND S.A. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef RTE_PMD_MLX4_H_
+#define RTE_PMD_MLX4_H_
+
+#include <stddef.h>
+#include <stdint.h>
+#include <limits.h>
+
+/*
+ * Maximum number of simultaneous MAC addresses supported.
+ *
+ * According to ConnectX's Programmer Reference Manual:
+ * The L2 Address Match is implemented by comparing a MAC/VLAN combination
+ * of 128 MAC addresses and 127 VLAN values, comprising 128x127 possible
+ * L2 addresses.
+ */
+#define MLX4_MAX_MAC_ADDRESSES 128
+
+/* Maximum number of simultaneous VLAN filters supported. See above. */
+#define MLX4_MAX_VLAN_IDS 127
+
+/* Maximum number of Scatter/Gather Elements per Work Request. */
+#ifndef MLX4_PMD_SGE_WR_N
+#define MLX4_PMD_SGE_WR_N 4
+#endif
+
+/* Maximum size for inline data. */
+#ifndef MLX4_PMD_MAX_INLINE
+#define MLX4_PMD_MAX_INLINE 0
+#endif
+
+/*
+ * Maximum number of cached Memory Pools (MPs) per TX queue. Each RTE MP
+ * from which buffers are to be transmitted will have to be mapped by this
+ * driver to their own Memory Region (MR). This is a slow operation.
+ *
+ * This value is always 1 for RX queues.
+ */
+#ifndef MLX4_PMD_TX_MP_CACHE
+#define MLX4_PMD_TX_MP_CACHE 8
+#endif
+
+/*
+ * If defined, only use software counters. The PMD will never ask the hardware
+ * for these, and many of them won't be available.
+ */
+#ifndef MLX4_PMD_SOFT_COUNTERS
+#define MLX4_PMD_SOFT_COUNTERS 1
+#endif
+
+enum {
+ PCI_VENDOR_ID_MELLANOX = 0x15b3,
+};
+
+enum {
+ PCI_DEVICE_ID_MELLANOX_CONNECTX3 = 0x1003,
+ PCI_DEVICE_ID_MELLANOX_CONNECTX3VF = 0x1004,
+ PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO = 0x1007,
+};
+
+#define MLX4_DRIVER_NAME "librte_pmd_mlx4"
+
+/* Bit-field manipulation. */
+#define BITFIELD_DECLARE(bf, type, size) \
+ type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \
+ !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
+#define BITFIELD_DEFINE(bf, type, size) \
+ BITFIELD_DECLARE((bf), type, (size)) = { 0 }
+#define BITFIELD_SET(bf, b) \
+ (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
+ (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
+ ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
+#define BITFIELD_RESET(bf, b) \
+ (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
+ (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
+ ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
+#define BITFIELD_ISSET(bf, b) \
+ (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
+ !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
+ ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
+
+/* Number of elements in array. */
+#define elemof(a) (sizeof(a) / sizeof((a)[0]))
+
+/* Cast pointer p to structure member m to its parent structure of type t. */
+#define containerof(p, t, m) ((t *)((uint8_t *)(p) - offsetof(t, m)))
+
+/* Branch prediction helpers. */
+#ifndef likely
+#define likely(c) __builtin_expect(!!(c), 1)
+#endif
+#ifndef unlikely
+#define unlikely(c) __builtin_expect(!!(c), 0)
+#endif
+
+/* Debugging */
+#ifndef NDEBUG
+#include <stdio.h>
+#define DEBUG__(m, ...) \
+ (fprintf(stderr, "%s:%d: %s(): " m "%c", \
+ __FILE__, __LINE__, __func__, __VA_ARGS__), \
+ fflush(stderr), \
+ (void)0)
+/*
+ * Save/restore errno around DEBUG__().
+ * XXX somewhat undefined behavior, but works.
+ */
+#define DEBUG_(...) \
+ (errno = ((int []){ \
+ *(volatile int *)&errno, \
+ (DEBUG__(__VA_ARGS__), 0) \
+ })[0])
+#define DEBUG(...) DEBUG_(__VA_ARGS__, '\n')
+#define claim_zero(...) assert((__VA_ARGS__) == 0)
+#define claim_nonzero(...) assert((__VA_ARGS__) != 0)
+#define claim_positive(...) assert((__VA_ARGS__) >= 0)
+#else /* NDEBUG */
+/* No-ops. */
+#define DEBUG(...) (void)0
+#define claim_zero(...) (__VA_ARGS__)
+#define claim_nonzero(...) (__VA_ARGS__)
+#define claim_positive(...) (__VA_ARGS__)
+#endif /* NDEBUG */
+
+#endif /* RTE_PMD_MLX4_H_ */
--- /dev/null
+DPDK_2.0 {
+
+ local: *;
+};
DIRS-$(CONFIG_RTE_LIBRTE_CFGFILE) += librte_cfgfile
DIRS-$(CONFIG_RTE_LIBRTE_CMDLINE) += librte_cmdline
DIRS-$(CONFIG_RTE_LIBRTE_ETHER) += librte_ether
-DIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += librte_pmd_mlx4
DIRS-$(CONFIG_RTE_LIBRTE_PMD_RING) += librte_pmd_ring
DIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += librte_pmd_pcap
DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += librte_pmd_virtio
+++ /dev/null
-# BSD LICENSE
-#
-# Copyright 2012-2015 6WIND S.A.
-# Copyright 2012 Mellanox.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-# * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-# * Redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in
-# the documentation and/or other materials provided with the
-# distribution.
-# * Neither the name of 6WIND S.A. nor the names of its
-# contributors may be used to endorse or promote products derived
-# from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-include $(RTE_SDK)/mk/rte.vars.mk
-
-# Library name.
-LIB = librte_pmd_mlx4.a
-
-# Sources.
-SRCS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += mlx4.c
-
-# Dependencies.
-DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_ether
-DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_mbuf
-DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_eal
-DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_mempool
-DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_malloc
-
-# Basic CFLAGS.
-CFLAGS += -O3
-CFLAGS += -std=gnu99 -Wall -Wextra
-CFLAGS += -g
-CFLAGS += -I.
-CFLAGS += -D_XOPEN_SOURCE=600
-CFLAGS += $(WERROR_FLAGS)
-
-# A few warnings cannot be avoided in external headers.
-CFLAGS += -Wno-error=cast-qual
-
-EXPORT_MAP := rte_pmd_mlx4_version.map
-LIBABIVER := 1
-
-# DEBUG which is usually provided on the command-line may enable
-# CONFIG_RTE_LIBRTE_MLX4_DEBUG.
-ifeq ($(DEBUG),1)
-CONFIG_RTE_LIBRTE_MLX4_DEBUG := y
-endif
-
-# User-defined CFLAGS.
-ifeq ($(CONFIG_RTE_LIBRTE_MLX4_DEBUG),y)
-CFLAGS += -pedantic -UNDEBUG -DPEDANTIC
-else
-CFLAGS += -DNDEBUG -UPEDANTIC
-endif
-
-ifdef CONFIG_RTE_LIBRTE_MLX4_SGE_WR_N
-CFLAGS += -DMLX4_PMD_SGE_WR_N=$(CONFIG_RTE_LIBRTE_MLX4_SGE_WR_N)
-endif
-
-ifdef CONFIG_RTE_LIBRTE_MLX4_MAX_INLINE
-CFLAGS += -DMLX4_PMD_MAX_INLINE=$(CONFIG_RTE_LIBRTE_MLX4_MAX_INLINE)
-endif
-
-ifdef CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE
-CFLAGS += -DMLX4_PMD_TX_MP_CACHE=$(CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE)
-endif
-
-ifdef CONFIG_RTE_LIBRTE_MLX4_SOFT_COUNTERS
-CFLAGS += -DMLX4_PMD_SOFT_COUNTERS=$(CONFIG_RTE_LIBRTE_MLX4_SOFT_COUNTERS)
-endif
-
-include $(RTE_SDK)/mk/rte.lib.mk
-
-# Generate and clean-up mlx4_autoconf.h.
-
-export CC CFLAGS CPPFLAGS EXTRA_CFLAGS EXTRA_CPPFLAGS
-export AUTO_CONFIG_CFLAGS = -Wno-error
-
-ifndef V
-AUTOCONF_OUTPUT := >/dev/null
-endif
-
-mlx4_autoconf.h: $(RTE_SDK)/scripts/auto-config-h.sh
- $Q $(RM) -f -- '$@'
- $Q sh -- '$<' '$@' \
- RSS_SUPPORT \
- infiniband/verbs.h \
- enum IBV_EXP_DEVICE_UD_RSS $(AUTOCONF_OUTPUT)
- $Q sh -- '$<' '$@' \
- INLINE_RECV \
- infiniband/verbs.h \
- enum IBV_EXP_DEVICE_ATTR_INLINE_RECV_SZ $(AUTOCONF_OUTPUT)
- $Q sh -- '$<' '$@' \
- SEND_RAW_WR_SUPPORT \
- infiniband/verbs.h \
- type 'struct ibv_send_wr_raw' $(AUTOCONF_OUTPUT)
-
-mlx4.o: mlx4_autoconf.h
-
-clean_mlx4: FORCE
- $Q rm -f -- mlx4_autoconf.h
-
-clean: clean_mlx4
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright 2012-2015 6WIND S.A.
- * Copyright 2012 Mellanox.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of 6WIND S.A. nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Known limitations:
- * - Multiple RX VLAN filters can be configured, but only the first one
- * works properly.
- * - RSS hash key and options cannot be modified.
- * - Hardware counters aren't implemented.
- */
-
-/* System headers. */
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-#include <limits.h>
-#include <assert.h>
-#include <arpa/inet.h>
-#include <net/if.h>
-#include <dirent.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <linux/if.h>
-#include <linux/ethtool.h>
-#include <linux/sockios.h>
-
-/* Verbs header. */
-/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
-#ifdef PEDANTIC
-#pragma GCC diagnostic ignored "-pedantic"
-#endif
-#include <infiniband/verbs.h>
-#ifdef PEDANTIC
-#pragma GCC diagnostic error "-pedantic"
-#endif
-
-/* DPDK headers don't like -pedantic. */
-#ifdef PEDANTIC
-#pragma GCC diagnostic ignored "-pedantic"
-#endif
-#include <rte_config.h>
-#include <rte_ether.h>
-#include <rte_ethdev.h>
-#include <rte_dev.h>
-#include <rte_mbuf.h>
-#include <rte_errno.h>
-#include <rte_mempool.h>
-#include <rte_prefetch.h>
-#include <rte_malloc.h>
-#include <rte_spinlock.h>
-#include <rte_atomic.h>
-#include <rte_version.h>
-#include <rte_log.h>
-#ifdef PEDANTIC
-#pragma GCC diagnostic error "-pedantic"
-#endif
-
-/* Generated configuration header. */
-#include "mlx4_autoconf.h"
-
-/* PMD header. */
-#include "mlx4.h"
-
-/* Runtime logging through RTE_LOG() is enabled when not in debugging mode.
- * Intermediate LOG_*() macros add the required end-of-line characters. */
-#ifndef NDEBUG
-#define INFO(...) DEBUG(__VA_ARGS__)
-#define WARN(...) DEBUG(__VA_ARGS__)
-#define ERROR(...) DEBUG(__VA_ARGS__)
-#else
-#define LOG__(level, m, ...) \
- RTE_LOG(level, PMD, MLX4_DRIVER_NAME ": " m "%c", __VA_ARGS__)
-#define LOG_(level, ...) LOG__(level, __VA_ARGS__, '\n')
-#define INFO(...) LOG_(INFO, __VA_ARGS__)
-#define WARN(...) LOG_(WARNING, __VA_ARGS__)
-#define ERROR(...) LOG_(ERR, __VA_ARGS__)
-#endif
-
-/* Convenience macros for accessing mbuf fields. */
-#define NEXT(m) ((m)->next)
-#define DATA_LEN(m) ((m)->data_len)
-#define PKT_LEN(m) ((m)->pkt_len)
-#define DATA_OFF(m) ((m)->data_off)
-#define SET_DATA_OFF(m, o) ((m)->data_off = (o))
-#define NB_SEGS(m) ((m)->nb_segs)
-#define PORT(m) ((m)->port)
-
-/* Work Request ID data type (64 bit). */
-typedef union {
- struct {
- uint32_t id;
- uint16_t offset;
- } data;
- uint64_t raw;
-} wr_id_t;
-
-#define WR_ID(o) (((wr_id_t *)&(o))->data)
-
-/* Compile-time check. */
-static inline void wr_id_t_check(void)
-{
- wr_id_t check[1 + (2 * -!(sizeof(wr_id_t) == sizeof(uint64_t)))];
-
- (void)check;
- (void)wr_id_t_check;
-}
-
-/* If raw send operations are available, use them since they are faster. */
-#ifdef SEND_RAW_WR_SUPPORT
-typedef struct ibv_send_wr_raw mlx4_send_wr_t;
-#define mlx4_post_send ibv_post_send_raw
-#else
-typedef struct ibv_send_wr mlx4_send_wr_t;
-#define mlx4_post_send ibv_post_send
-#endif
-
-struct mlx4_rxq_stats {
- unsigned int idx; /**< Mapping index. */
-#ifdef MLX4_PMD_SOFT_COUNTERS
- uint64_t ipackets; /**< Total of successfully received packets. */
- uint64_t ibytes; /**< Total of successfully received bytes. */
-#endif
- uint64_t idropped; /**< Total of packets dropped when RX ring full. */
- uint64_t rx_nombuf; /**< Total of RX mbuf allocation failures. */
-};
-
-struct mlx4_txq_stats {
- unsigned int idx; /**< Mapping index. */
-#ifdef MLX4_PMD_SOFT_COUNTERS
- uint64_t opackets; /**< Total of successfully sent packets. */
- uint64_t obytes; /**< Total of successfully sent bytes. */
-#endif
- uint64_t odropped; /**< Total of packets not sent when TX ring full. */
-};
-
-/* RX element (scattered packets). */
-struct rxq_elt_sp {
- struct ibv_recv_wr wr; /* Work Request. */
- struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
- struct rte_mbuf *bufs[MLX4_PMD_SGE_WR_N]; /* SGEs buffers. */
-};
-
-/* RX element. */
-struct rxq_elt {
- struct ibv_recv_wr wr; /* Work Request. */
- struct ibv_sge sge; /* Scatter/Gather Element. */
- /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
-};
-
-/* RX queue descriptor. */
-struct rxq {
- struct priv *priv; /* Back pointer to private data. */
- struct rte_mempool *mp; /* Memory Pool for allocations. */
- struct ibv_mr *mr; /* Memory Region (for mp). */
- struct ibv_cq *cq; /* Completion Queue. */
- struct ibv_qp *qp; /* Queue Pair. */
- /*
- * There is exactly one flow configured per MAC address. Each flow
- * may contain several specifications, one per configured VLAN ID.
- */
- BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
- struct ibv_exp_flow *mac_flow[MLX4_MAX_MAC_ADDRESSES];
- struct ibv_exp_flow *promisc_flow; /* Promiscuous flow. */
- struct ibv_exp_flow *allmulti_flow; /* Multicast flow. */
- unsigned int port_id; /* Port ID for incoming packets. */
- unsigned int elts_n; /* (*elts)[] length. */
- union {
- struct rxq_elt_sp (*sp)[]; /* Scattered RX elements. */
- struct rxq_elt (*no_sp)[]; /* RX elements. */
- } elts;
- unsigned int sp:1; /* Use scattered RX elements. */
- uint32_t mb_len; /* Length of a mp-issued mbuf. */
- struct mlx4_rxq_stats stats; /* RX queue counters. */
- unsigned int socket; /* CPU socket ID for allocations. */
-};
-
-/* TX element. */
-struct txq_elt {
- mlx4_send_wr_t wr; /* Work Request. */
- struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
- /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
-};
-
-/* Linear buffer type. It is used when transmitting buffers with too many
- * segments that do not fit the hardware queue (see max_send_sge).
- * Extra segments are copied (linearized) in such buffers, replacing the
- * last SGE during TX.
- * The size is arbitrary but large enough to hold a jumbo frame with
- * 8 segments considering mbuf.buf_len is about 2048 bytes. */
-typedef uint8_t linear_t[16384];
-
-/* TX queue descriptor. */
-struct txq {
- struct priv *priv; /* Back pointer to private data. */
- struct {
- struct rte_mempool *mp; /* Cached Memory Pool. */
- struct ibv_mr *mr; /* Memory Region (for mp). */
- uint32_t lkey; /* mr->lkey */
- } mp2mr[MLX4_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
- struct ibv_cq *cq; /* Completion Queue. */
- struct ibv_qp *qp; /* Queue Pair. */
-#if MLX4_PMD_MAX_INLINE > 0
- uint32_t max_inline; /* Max inline send size <= MLX4_PMD_MAX_INLINE. */
-#endif
- unsigned int elts_n; /* (*elts)[] length. */
- struct txq_elt (*elts)[]; /* TX elements. */
- unsigned int elts_head; /* Current index in (*elts)[]. */
- unsigned int elts_tail; /* First element awaiting completion. */
- unsigned int elts_comp; /* Number of completion requests. */
- struct mlx4_txq_stats stats; /* TX queue counters. */
- linear_t (*elts_linear)[]; /* Linearized buffers. */
- struct ibv_mr *mr_linear; /* Memory Region for linearized buffers. */
- unsigned int socket; /* CPU socket ID for allocations. */
-};
-
-struct priv {
- struct rte_eth_dev *dev; /* Ethernet device. */
- struct ibv_context *ctx; /* Verbs context. */
- struct ibv_device_attr device_attr; /* Device properties. */
- struct ibv_port_attr port_attr; /* Physical port properties. */
- struct ibv_pd *pd; /* Protection Domain. */
- /*
- * MAC addresses array and configuration bit-field.
- * An extra entry that cannot be modified by the DPDK is reserved
- * for broadcast frames (destination MAC address ff:ff:ff:ff:ff:ff).
- */
- struct ether_addr mac[MLX4_MAX_MAC_ADDRESSES];
- BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
- /* VLAN filters. */
- struct {
- unsigned int enabled:1; /* If enabled. */
- unsigned int id:12; /* VLAN ID (0-4095). */
- } vlan_filter[MLX4_MAX_VLAN_IDS]; /* VLAN filters table. */
- /* Device properties. */
- uint16_t mtu; /* Configured MTU. */
- uint8_t port; /* Physical port number. */
- unsigned int started:1; /* Device started, flows enabled. */
- unsigned int promisc:1; /* Device in promiscuous mode. */
- unsigned int promisc_ok:1; /* Promiscuous flow is supported. */
- unsigned int allmulti:1; /* Device receives all multicast packets. */
- unsigned int hw_qpg:1; /* QP groups are supported. */
- unsigned int hw_tss:1; /* TSS is supported. */
- unsigned int hw_rss:1; /* RSS is supported. */
- unsigned int rss:1; /* RSS is enabled. */
- unsigned int vf:1; /* This is a VF device. */
-#ifdef INLINE_RECV
- unsigned int inl_recv_size; /* Inline recv size */
-#endif
- unsigned int max_rss_tbl_sz; /* Maximum number of RSS queues. */
- /* RX/TX queues. */
- struct rxq rxq_parent; /* Parent queue when RSS is enabled. */
- unsigned int rxqs_n; /* RX queues array size. */
- unsigned int txqs_n; /* TX queues array size. */
- struct rxq *(*rxqs)[]; /* RX queues. */
- struct txq *(*txqs)[]; /* TX queues. */
- rte_spinlock_t lock; /* Lock for control functions. */
-};
-
-/**
- * Lock private structure to protect it from concurrent access in the
- * control path.
- *
- * @param priv
- * Pointer to private structure.
- */
-static void
-priv_lock(struct priv *priv)
-{
- rte_spinlock_lock(&priv->lock);
-}
-
-/**
- * Unlock private structure.
- *
- * @param priv
- * Pointer to private structure.
- */
-static void
-priv_unlock(struct priv *priv)
-{
- rte_spinlock_unlock(&priv->lock);
-}
-
-/* Allocate a buffer on the stack and fill it with a printf format string. */
-#define MKSTR(name, ...) \
- char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
- \
- snprintf(name, sizeof(name), __VA_ARGS__)
-
-/**
- * Get interface name from private structure.
- *
- * @param[in] priv
- * Pointer to private structure.
- * @param[out] ifname
- * Interface name output buffer.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
-{
- int ret = -1;
- DIR *dir;
- struct dirent *dent;
-
- {
- MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
-
- dir = opendir(path);
- if (dir == NULL)
- return -1;
- }
- while ((dent = readdir(dir)) != NULL) {
- char *name = dent->d_name;
- FILE *file;
- unsigned int dev_id;
- int r;
-
- if ((name[0] == '.') &&
- ((name[1] == '\0') ||
- ((name[1] == '.') && (name[2] == '\0'))))
- continue;
-
- MKSTR(path, "%s/device/net/%s/dev_id",
- priv->ctx->device->ibdev_path, name);
-
- file = fopen(path, "rb");
- if (file == NULL)
- continue;
- r = fscanf(file, "%x", &dev_id);
- fclose(file);
- if ((r == 1) && (dev_id == (priv->port - 1u))) {
- snprintf(*ifname, sizeof(*ifname), "%s", name);
- ret = 0;
- break;
- }
- }
- closedir(dir);
- return ret;
-}
-
-/**
- * Read from sysfs entry.
- *
- * @param[in] priv
- * Pointer to private structure.
- * @param[in] entry
- * Entry name relative to sysfs path.
- * @param[out] buf
- * Data output buffer.
- * @param size
- * Buffer size.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_sysfs_read(const struct priv *priv, const char *entry,
- char *buf, size_t size)
-{
- char ifname[IF_NAMESIZE];
- FILE *file;
- int ret;
- int err;
-
- if (priv_get_ifname(priv, &ifname))
- return -1;
-
- MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
- ifname, entry);
-
- file = fopen(path, "rb");
- if (file == NULL)
- return -1;
- ret = fread(buf, 1, size, file);
- err = errno;
- if (((size_t)ret < size) && (ferror(file)))
- ret = -1;
- else
- ret = size;
- fclose(file);
- errno = err;
- return ret;
-}
-
-/**
- * Write to sysfs entry.
- *
- * @param[in] priv
- * Pointer to private structure.
- * @param[in] entry
- * Entry name relative to sysfs path.
- * @param[in] buf
- * Data buffer.
- * @param size
- * Buffer size.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_sysfs_write(const struct priv *priv, const char *entry,
- char *buf, size_t size)
-{
- char ifname[IF_NAMESIZE];
- FILE *file;
- int ret;
- int err;
-
- if (priv_get_ifname(priv, &ifname))
- return -1;
-
- MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
- ifname, entry);
-
- file = fopen(path, "wb");
- if (file == NULL)
- return -1;
- ret = fwrite(buf, 1, size, file);
- err = errno;
- if (((size_t)ret < size) || (ferror(file)))
- ret = -1;
- else
- ret = size;
- fclose(file);
- errno = err;
- return ret;
-}
-
-/**
- * Get unsigned long sysfs property.
- *
- * @param priv
- * Pointer to private structure.
- * @param[in] name
- * Entry name relative to sysfs path.
- * @param[out] value
- * Value output buffer.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
-{
- int ret;
- unsigned long value_ret;
- char value_str[32];
-
- ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
- if (ret == -1) {
- DEBUG("cannot read %s value from sysfs: %s",
- name, strerror(errno));
- return -1;
- }
- value_str[ret] = '\0';
- errno = 0;
- value_ret = strtoul(value_str, NULL, 0);
- if (errno) {
- DEBUG("invalid %s value `%s': %s", name, value_str,
- strerror(errno));
- return -1;
- }
- *value = value_ret;
- return 0;
-}
-
-/**
- * Set unsigned long sysfs property.
- *
- * @param priv
- * Pointer to private structure.
- * @param[in] name
- * Entry name relative to sysfs path.
- * @param value
- * Value to set.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
-{
- int ret;
- MKSTR(value_str, "%lu", value);
-
- ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
- if (ret == -1) {
- DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
- name, value_str, value, strerror(errno));
- return -1;
- }
- return 0;
-}
-
-/**
- * Perform ifreq ioctl() on associated Ethernet device.
- *
- * @param[in] priv
- * Pointer to private structure.
- * @param req
- * Request number to pass to ioctl().
- * @param[out] ifr
- * Interface request structure output buffer.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
-{
- int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
- int ret = -1;
-
- if (sock == -1)
- return ret;
- if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
- ret = ioctl(sock, req, ifr);
- close(sock);
- return ret;
-}
-
-/**
- * Get device MTU.
- *
- * @param priv
- * Pointer to private structure.
- * @param[out] mtu
- * MTU value output buffer.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_get_mtu(struct priv *priv, uint16_t *mtu)
-{
- unsigned long ulong_mtu;
-
- if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
- return -1;
- *mtu = ulong_mtu;
- return 0;
-}
-
-/**
- * Set device MTU.
- *
- * @param priv
- * Pointer to private structure.
- * @param mtu
- * MTU value to set.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_set_mtu(struct priv *priv, uint16_t mtu)
-{
- return priv_set_sysfs_ulong(priv, "mtu", mtu);
-}
-
-/**
- * Set device flags.
- *
- * @param priv
- * Pointer to private structure.
- * @param keep
- * Bitmask for flags that must remain untouched.
- * @param flags
- * Bitmask for flags to modify.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
-{
- unsigned long tmp;
-
- if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
- return -1;
- tmp &= keep;
- tmp |= flags;
- return priv_set_sysfs_ulong(priv, "flags", tmp);
-}
-
-/* Device configuration. */
-
-static int
-rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
- unsigned int socket, const struct rte_eth_rxconf *conf,
- struct rte_mempool *mp);
-
-static void
-rxq_cleanup(struct rxq *rxq);
-
-/**
- * Ethernet device configuration.
- *
- * Prepare the driver for a given number of TX and RX queues.
- * Allocate parent RSS queue when several RX queues are requested.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-dev_configure(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int rxqs_n = dev->data->nb_rx_queues;
- unsigned int txqs_n = dev->data->nb_tx_queues;
- unsigned int tmp;
- int ret;
-
- priv->rxqs = (void *)dev->data->rx_queues;
- priv->txqs = (void *)dev->data->tx_queues;
- if (txqs_n != priv->txqs_n) {
- INFO("%p: TX queues number update: %u -> %u",
- (void *)dev, priv->txqs_n, txqs_n);
- priv->txqs_n = txqs_n;
- }
- if (rxqs_n == priv->rxqs_n)
- return 0;
- INFO("%p: RX queues number update: %u -> %u",
- (void *)dev, priv->rxqs_n, rxqs_n);
- /* If RSS is enabled, disable it first. */
- if (priv->rss) {
- unsigned int i;
-
- /* Only if there are no remaining child RX queues. */
- for (i = 0; (i != priv->rxqs_n); ++i)
- if ((*priv->rxqs)[i] != NULL)
- return EINVAL;
- rxq_cleanup(&priv->rxq_parent);
- priv->rss = 0;
- priv->rxqs_n = 0;
- }
- if (rxqs_n <= 1) {
- /* Nothing else to do. */
- priv->rxqs_n = rxqs_n;
- return 0;
- }
- /* Allocate a new RSS parent queue if supported by hardware. */
- if (!priv->hw_rss) {
- ERROR("%p: only a single RX queue can be configured when"
- " hardware doesn't support RSS",
- (void *)dev);
- return EINVAL;
- }
- /* Fail if hardware doesn't support that many RSS queues. */
- if (rxqs_n >= priv->max_rss_tbl_sz) {
- ERROR("%p: only %u RX queues can be configured for RSS",
- (void *)dev, priv->max_rss_tbl_sz);
- return EINVAL;
- }
- priv->rss = 1;
- tmp = priv->rxqs_n;
- priv->rxqs_n = rxqs_n;
- ret = rxq_setup(dev, &priv->rxq_parent, 0, 0, NULL, NULL);
- if (!ret)
- return 0;
- /* Failure, rollback. */
- priv->rss = 0;
- priv->rxqs_n = tmp;
- assert(ret > 0);
- return ret;
-}
-
-/**
- * DPDK callback for Ethernet device configuration.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_dev_configure(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- int ret;
-
- priv_lock(priv);
- ret = dev_configure(dev);
- assert(ret >= 0);
- priv_unlock(priv);
- return -ret;
-}
-
-/* TX queues handling. */
-
-/**
- * Allocate TX queue elements.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param elts_n
- * Number of elements to allocate.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-txq_alloc_elts(struct txq *txq, unsigned int elts_n)
-{
- unsigned int i;
- struct txq_elt (*elts)[elts_n] =
- rte_calloc_socket("TXQ", 1, sizeof(*elts), 0, txq->socket);
- linear_t (*elts_linear)[elts_n] =
- rte_calloc_socket("TXQ", 1, sizeof(*elts_linear), 0,
- txq->socket);
- struct ibv_mr *mr_linear = NULL;
- int ret = 0;
-
- if ((elts == NULL) || (elts_linear == NULL)) {
- ERROR("%p: can't allocate packets array", (void *)txq);
- ret = ENOMEM;
- goto error;
- }
- mr_linear =
- ibv_reg_mr(txq->priv->pd, elts_linear, sizeof(*elts_linear),
- (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
- if (mr_linear == NULL) {
- ERROR("%p: unable to configure MR, ibv_reg_mr() failed",
- (void *)txq);
- ret = EINVAL;
- goto error;
- }
- for (i = 0; (i != elts_n); ++i) {
- struct txq_elt *elt = &(*elts)[i];
- mlx4_send_wr_t *wr = &elt->wr;
-
- /* Configure WR. */
- WR_ID(wr->wr_id).id = i;
- WR_ID(wr->wr_id).offset = 0;
- wr->sg_list = &elt->sges[0];
- wr->opcode = IBV_WR_SEND;
- /* Other fields are updated during TX. */
- }
- DEBUG("%p: allocated and configured %u WRs", (void *)txq, elts_n);
- txq->elts_n = elts_n;
- txq->elts = elts;
- txq->elts_head = 0;
- txq->elts_tail = 0;
- txq->elts_comp = 0;
- txq->elts_linear = elts_linear;
- txq->mr_linear = mr_linear;
- assert(ret == 0);
- return 0;
-error:
- if (mr_linear != NULL)
- claim_zero(ibv_dereg_mr(mr_linear));
-
- rte_free(elts_linear);
- rte_free(elts);
-
- DEBUG("%p: failed, freed everything", (void *)txq);
- assert(ret > 0);
- return ret;
-}
-
-/**
- * Free TX queue elements.
- *
- * @param txq
- * Pointer to TX queue structure.
- */
-static void
-txq_free_elts(struct txq *txq)
-{
- unsigned int i;
- unsigned int elts_n = txq->elts_n;
- struct txq_elt (*elts)[elts_n] = txq->elts;
- linear_t (*elts_linear)[elts_n] = txq->elts_linear;
- struct ibv_mr *mr_linear = txq->mr_linear;
-
- DEBUG("%p: freeing WRs", (void *)txq);
- txq->elts_n = 0;
- txq->elts = NULL;
- txq->elts_linear = NULL;
- txq->mr_linear = NULL;
- if (mr_linear != NULL)
- claim_zero(ibv_dereg_mr(mr_linear));
-
- rte_free(elts_linear);
- if (elts == NULL)
- return;
- for (i = 0; (i != elemof(*elts)); ++i) {
- struct txq_elt *elt = &(*elts)[i];
-
- if (WR_ID(elt->wr.wr_id).offset == 0)
- continue;
- rte_pktmbuf_free((void *)(elt->sges[0].addr -
- WR_ID(elt->wr.wr_id).offset));
- }
- rte_free(elts);
-}
-
-
-/**
- * Clean up a TX queue.
- *
- * Destroy objects, free allocated memory and reset the structure for reuse.
- *
- * @param txq
- * Pointer to TX queue structure.
- */
-static void
-txq_cleanup(struct txq *txq)
-{
- size_t i;
-
- DEBUG("cleaning up %p", (void *)txq);
- txq_free_elts(txq);
- if (txq->qp != NULL)
- claim_zero(ibv_destroy_qp(txq->qp));
- if (txq->cq != NULL)
- claim_zero(ibv_destroy_cq(txq->cq));
- for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
- if (txq->mp2mr[i].mp == NULL)
- break;
- assert(txq->mp2mr[i].mr != NULL);
- claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
- }
- memset(txq, 0, sizeof(*txq));
-}
-
-/**
- * Manage TX completions.
- *
- * When sending a burst, mlx4_tx_burst() posts several WRs.
- * To improve performance, a completion event is only required for the last of
- * them. Doing so discards completion information for other WRs, but this
- * information would not be used anyway.
- *
- * @param txq
- * Pointer to TX queue structure.
- *
- * @return
- * 0 on success, -1 on failure.
- */
-static int
-txq_complete(struct txq *txq)
-{
- unsigned int elts_comp = txq->elts_comp;
- unsigned int elts_tail;
- const unsigned int elts_n = txq->elts_n;
- struct ibv_wc wcs[elts_comp];
- int wcs_n;
-
- if (unlikely(elts_comp == 0))
- return 0;
-#ifdef DEBUG_SEND
- DEBUG("%p: processing %u work requests completions",
- (void *)txq, elts_comp);
-#endif
- wcs_n = ibv_poll_cq(txq->cq, elts_comp, wcs);
- if (unlikely(wcs_n == 0))
- return 0;
- if (unlikely(wcs_n < 0)) {
- DEBUG("%p: ibv_poll_cq() failed (wcs_n=%d)",
- (void *)txq, wcs_n);
- return -1;
- }
- elts_comp -= wcs_n;
- assert(elts_comp <= txq->elts_comp);
- /*
- * Work Completion ID contains the associated element index in
- * (*txq->elts)[]. Since WCs are returned in order, we only need to
- * look at the last WC to clear older Work Requests.
- *
- * Assume WC status is successful as nothing can be done about it
- * anyway.
- */
- elts_tail = WR_ID(wcs[wcs_n - 1].wr_id).id;
- /* Consume the last WC. */
- if (++elts_tail >= elts_n)
- elts_tail = 0;
- txq->elts_tail = elts_tail;
- txq->elts_comp = elts_comp;
- return 0;
-}
-
-/**
- * Get Memory Region (MR) <-> Memory Pool (MP) association from txq->mp2mr[].
- * Add MP to txq->mp2mr[] if it's not registered yet. If mp2mr[] is full,
- * remove an entry first.
- *
- * @param txq
- * Pointer to TX queue structure.
- * @param[in] mp
- * Memory Pool for which a Memory Region lkey must be returned.
- *
- * @return
- * mr->lkey on success, (uint32_t)-1 on failure.
- */
-static uint32_t
-txq_mp2mr(struct txq *txq, struct rte_mempool *mp)
-{
- unsigned int i;
- struct ibv_mr *mr;
-
- for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
- if (unlikely(txq->mp2mr[i].mp == NULL)) {
- /* Unknown MP, add a new MR for it. */
- break;
- }
- if (txq->mp2mr[i].mp == mp) {
- assert(txq->mp2mr[i].lkey != (uint32_t)-1);
- assert(txq->mp2mr[i].mr->lkey == txq->mp2mr[i].lkey);
- return txq->mp2mr[i].lkey;
- }
- }
- /* Add a new entry, register MR first. */
- DEBUG("%p: discovered new memory pool %p", (void *)txq, (void *)mp);
- mr = ibv_reg_mr(txq->priv->pd,
- (void *)mp->elt_va_start,
- (mp->elt_va_end - mp->elt_va_start),
- (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
- if (unlikely(mr == NULL)) {
- DEBUG("%p: unable to configure MR, ibv_reg_mr() failed.",
- (void *)txq);
- return (uint32_t)-1;
- }
- if (unlikely(i == elemof(txq->mp2mr))) {
- /* Table is full, remove oldest entry. */
- DEBUG("%p: MR <-> MP table full, dropping oldest entry.",
- (void *)txq);
- --i;
- claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
- memmove(&txq->mp2mr[0], &txq->mp2mr[1],
- (sizeof(txq->mp2mr) - sizeof(txq->mp2mr[0])));
- }
- /* Store the new entry. */
- txq->mp2mr[i].mp = mp;
- txq->mp2mr[i].mr = mr;
- txq->mp2mr[i].lkey = mr->lkey;
- DEBUG("%p: new MR lkey for MP %p: 0x%08" PRIu32,
- (void *)txq, (void *)mp, txq->mp2mr[i].lkey);
- return txq->mp2mr[i].lkey;
-}
-
-/**
- * Copy scattered mbuf contents to a single linear buffer.
- *
- * @param[out] linear
- * Linear output buffer.
- * @param[in] buf
- * Scattered input buffer.
- *
- * @return
- * Number of bytes copied to the output buffer or 0 if not large enough.
- */
-static unsigned int
-linearize_mbuf(linear_t *linear, struct rte_mbuf *buf)
-{
- unsigned int size = 0;
- unsigned int offset;
-
- do {
- unsigned int len = DATA_LEN(buf);
-
- offset = size;
- size += len;
- if (unlikely(size > sizeof(*linear)))
- return 0;
- memcpy(&(*linear)[offset],
- rte_pktmbuf_mtod(buf, uint8_t *),
- len);
- buf = NEXT(buf);
- } while (buf != NULL);
- return size;
-}
-
-/**
- * DPDK callback for TX.
- *
- * @param dpdk_txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
- *
- * @return
- * Number of packets successfully transmitted (<= pkts_n).
- */
-static uint16_t
-mlx4_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
-{
- struct txq *txq = (struct txq *)dpdk_txq;
- mlx4_send_wr_t head;
- mlx4_send_wr_t **wr_next = &head.next;
- mlx4_send_wr_t *bad_wr;
- unsigned int elts_head = txq->elts_head;
- const unsigned int elts_tail = txq->elts_tail;
- const unsigned int elts_n = txq->elts_n;
- unsigned int i;
- unsigned int max;
- int err;
-
- txq_complete(txq);
- max = (elts_n - (elts_head - elts_tail));
- if (max > elts_n)
- max -= elts_n;
- assert(max >= 1);
- assert(max <= elts_n);
- /* Always leave one free entry in the ring. */
- --max;
- if (max == 0)
- return 0;
- if (max > pkts_n)
- max = pkts_n;
- for (i = 0; (i != max); ++i) {
- struct rte_mbuf *buf = pkts[i];
- struct txq_elt *elt = &(*txq->elts)[elts_head];
- mlx4_send_wr_t *wr = &elt->wr;
- unsigned int segs = NB_SEGS(buf);
-#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
- unsigned int sent_size = 0;
-#endif
- unsigned int j;
- int linearize = 0;
-
- /* Clean up old buffer. */
- if (likely(WR_ID(wr->wr_id).offset != 0)) {
- struct rte_mbuf *tmp = (void *)
- (elt->sges[0].addr - WR_ID(wr->wr_id).offset);
-
- /* Faster than rte_pktmbuf_free(). */
- do {
- struct rte_mbuf *next = NEXT(tmp);
-
- rte_pktmbuf_free_seg(tmp);
- tmp = next;
- } while (tmp != NULL);
- }
-#ifndef NDEBUG
- /* For assert(). */
- WR_ID(wr->wr_id).offset = 0;
- for (j = 0; ((int)j < wr->num_sge); ++j) {
- elt->sges[j].addr = 0;
- elt->sges[j].length = 0;
- elt->sges[j].lkey = 0;
- }
- wr->next = NULL;
- wr->num_sge = 0;
-#endif
- /* Sanity checks, most of which are only relevant with
- * debugging enabled. */
- assert(WR_ID(wr->wr_id).id == elts_head);
- assert(WR_ID(wr->wr_id).offset == 0);
- assert(wr->next == NULL);
- assert(wr->sg_list == &elt->sges[0]);
- assert(wr->num_sge == 0);
- assert(wr->opcode == IBV_WR_SEND);
- /* When there are too many segments, extra segments are
- * linearized in the last SGE. */
- if (unlikely(segs > elemof(elt->sges))) {
- segs = (elemof(elt->sges) - 1);
- linearize = 1;
- }
- /* Set WR fields. */
- assert(((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
- (uintptr_t)buf) <= 0xffff);
- WR_ID(wr->wr_id).offset =
- ((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
- (uintptr_t)buf);
- wr->num_sge = segs;
- /* Register segments as SGEs. */
- for (j = 0; (j != segs); ++j) {
- struct ibv_sge *sge = &elt->sges[j];
- uint32_t lkey;
-
- /* Retrieve Memory Region key for this memory pool. */
- lkey = txq_mp2mr(txq, buf->pool);
- if (unlikely(lkey == (uint32_t)-1)) {
- /* MR does not exist. */
- DEBUG("%p: unable to get MP <-> MR"
- " association", (void *)txq);
- /* Clean up TX element. */
- WR_ID(elt->wr.wr_id).offset = 0;
-#ifndef NDEBUG
- /* For assert(). */
- while (j) {
- --j;
- --sge;
- sge->addr = 0;
- sge->length = 0;
- sge->lkey = 0;
- }
- wr->num_sge = 0;
-#endif
- goto stop;
- }
- /* Sanity checks, only relevant with debugging
- * enabled. */
- assert(sge->addr == 0);
- assert(sge->length == 0);
- assert(sge->lkey == 0);
- /* Update SGE. */
- sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf, char *);
- if (txq->priv->vf)
- rte_prefetch0((volatile void *)sge->addr);
- sge->length = DATA_LEN(buf);
- sge->lkey = lkey;
-#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
- sent_size += sge->length;
-#endif
- buf = NEXT(buf);
- }
- /* If buf is not NULL here and is not going to be linearized,
- * nb_segs is not valid. */
- assert(j == segs);
- assert((buf == NULL) || (linearize));
- /* Linearize extra segments. */
- if (linearize) {
- struct ibv_sge *sge = &elt->sges[segs];
- linear_t *linear = &(*txq->elts_linear)[elts_head];
- unsigned int size = linearize_mbuf(linear, buf);
-
- assert(segs == (elemof(elt->sges) - 1));
- if (size == 0) {
- /* Invalid packet. */
- DEBUG("%p: packet too large to be linearized.",
- (void *)txq);
- /* Clean up TX element. */
- WR_ID(elt->wr.wr_id).offset = 0;
-#ifndef NDEBUG
- /* For assert(). */
- while (j) {
- --j;
- --sge;
- sge->addr = 0;
- sge->length = 0;
- sge->lkey = 0;
- }
- wr->num_sge = 0;
-#endif
- goto stop;
- }
- /* If MLX4_PMD_SGE_WR_N is 1, free mbuf immediately
- * and clear offset from WR ID. */
- if (elemof(elt->sges) == 1) {
- do {
- struct rte_mbuf *next = NEXT(buf);
-
- rte_pktmbuf_free_seg(buf);
- buf = next;
- } while (buf != NULL);
- WR_ID(wr->wr_id).offset = 0;
- }
- /* Set WR fields and fill SGE with linear buffer. */
- ++wr->num_sge;
- /* Sanity checks, only relevant with debugging
- * enabled. */
- assert(sge->addr == 0);
- assert(sge->length == 0);
- assert(sge->lkey == 0);
- /* Update SGE. */
- sge->addr = (uintptr_t)&(*linear)[0];
- sge->length = size;
- sge->lkey = txq->mr_linear->lkey;
-#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
- sent_size += size;
-#endif
- }
- /* Link WRs together for ibv_post_send(). */
- *wr_next = wr;
- wr_next = &wr->next;
-#if MLX4_PMD_MAX_INLINE > 0
- if (sent_size <= txq->max_inline)
- wr->send_flags = IBV_SEND_INLINE;
- else
-#endif
- wr->send_flags = 0;
- if (++elts_head >= elts_n)
- elts_head = 0;
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increment sent bytes counter. */
- txq->stats.obytes += sent_size;
-#endif
- }
-stop:
- /* Take a shortcut if nothing must be sent. */
- if (unlikely(i == 0))
- return 0;
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increment sent packets counter. */
- txq->stats.opackets += i;
-#endif
- *wr_next = NULL;
- /* The last WR is the only one asking for a completion event. */
- containerof(wr_next, mlx4_send_wr_t, next)->
- send_flags |= IBV_SEND_SIGNALED;
- err = mlx4_post_send(txq->qp, head.next, &bad_wr);
- if (unlikely(err)) {
- unsigned int unsent = 0;
-
- /* An error occurred, completion event is lost. Fix counters. */
- while (bad_wr != NULL) {
- struct txq_elt *elt =
- containerof(bad_wr, struct txq_elt, wr);
- mlx4_send_wr_t *wr = &elt->wr;
- mlx4_send_wr_t *next = wr->next;
-#if defined(MLX4_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
- unsigned int j;
-#endif
-
- assert(wr == bad_wr);
- /* Clean up TX element without freeing it, caller
- * should take care of this. */
- WR_ID(elt->wr.wr_id).offset = 0;
-#ifdef MLX4_PMD_SOFT_COUNTERS
- for (j = 0; ((int)j < wr->num_sge); ++j)
- txq->stats.obytes -= wr->sg_list[j].length;
-#endif
- ++unsent;
-#ifndef NDEBUG
- /* For assert(). */
- for (j = 0; ((int)j < wr->num_sge); ++j) {
- elt->sges[j].addr = 0;
- elt->sges[j].length = 0;
- elt->sges[j].lkey = 0;
- }
- wr->next = NULL;
- wr->num_sge = 0;
-#endif
- bad_wr = next;
- }
-#ifdef MLX4_PMD_SOFT_COUNTERS
- txq->stats.opackets -= unsent;
-#endif
- assert(i >= unsent);
- i -= unsent;
- /* "Unsend" remaining packets. */
- elts_head -= unsent;
- if (elts_head >= elts_n)
- elts_head += elts_n;
- assert(elts_head < elts_n);
- DEBUG("%p: mlx4_post_send() failed, %u unprocessed WRs: %s",
- (void *)txq, unsent,
- ((err <= -1) ? "Internal error" : strerror(err)));
- } else
- ++txq->elts_comp;
- txq->elts_head = elts_head;
- return i;
-}
-
-/**
- * Configure a TX queue.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param txq
- * Pointer to TX queue structure.
- * @param desc
- * Number of descriptors to configure in queue.
- * @param socket
- * NUMA socket on which memory must be allocated.
- * @param[in] conf
- * Thresholds parameters.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
- unsigned int socket, const struct rte_eth_txconf *conf)
-{
- struct priv *priv = dev->data->dev_private;
- struct txq tmpl = {
- .priv = priv,
- .socket = socket
- };
- union {
- struct ibv_qp_init_attr init;
- struct ibv_exp_qp_attr mod;
- } attr;
- int ret = 0;
-
- (void)conf; /* Thresholds configuration (ignored). */
- if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
- ERROR("%p: invalid number of TX descriptors (must be a"
- " multiple of %d)", (void *)dev, desc);
- return EINVAL;
- }
- desc /= MLX4_PMD_SGE_WR_N;
- /* MRs will be registered in mp2mr[] later. */
- tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
- if (tmpl.cq == NULL) {
- ret = ENOMEM;
- ERROR("%p: CQ creation failure: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- DEBUG("priv->device_attr.max_qp_wr is %d",
- priv->device_attr.max_qp_wr);
- DEBUG("priv->device_attr.max_sge is %d",
- priv->device_attr.max_sge);
- attr.init = (struct ibv_qp_init_attr){
- /* CQ to be associated with the send queue. */
- .send_cq = tmpl.cq,
- /* CQ to be associated with the receive queue. */
- .recv_cq = tmpl.cq,
- .cap = {
- /* Max number of outstanding WRs. */
- .max_send_wr = ((priv->device_attr.max_qp_wr < desc) ?
- priv->device_attr.max_qp_wr :
- desc),
- /* Max number of scatter/gather elements in a WR. */
- .max_send_sge = ((priv->device_attr.max_sge <
- MLX4_PMD_SGE_WR_N) ?
- priv->device_attr.max_sge :
- MLX4_PMD_SGE_WR_N),
-#if MLX4_PMD_MAX_INLINE > 0
- .max_inline_data = MLX4_PMD_MAX_INLINE,
-#endif
- },
- .qp_type = IBV_QPT_RAW_PACKET,
- /* Do *NOT* enable this, completions events are managed per
- * TX burst. */
- .sq_sig_all = 0
- };
- tmpl.qp = ibv_create_qp(priv->pd, &attr.init);
- if (tmpl.qp == NULL) {
- ret = (errno ? errno : EINVAL);
- ERROR("%p: QP creation failure: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
-#if MLX4_PMD_MAX_INLINE > 0
- /* ibv_create_qp() updates this value. */
- tmpl.max_inline = attr.init.cap.max_inline_data;
-#endif
- attr.mod = (struct ibv_exp_qp_attr){
- /* Move the QP to this state. */
- .qp_state = IBV_QPS_INIT,
- /* Primary port number. */
- .port_num = priv->port
- };
- ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod,
- (IBV_EXP_QP_STATE | IBV_EXP_QP_PORT));
- if (ret) {
- ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- ret = txq_alloc_elts(&tmpl, desc);
- if (ret) {
- ERROR("%p: TXQ allocation failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- attr.mod = (struct ibv_exp_qp_attr){
- .qp_state = IBV_QPS_RTR
- };
- ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
- if (ret) {
- ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- attr.mod.qp_state = IBV_QPS_RTS;
- ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
- if (ret) {
- ERROR("%p: QP state to IBV_QPS_RTS failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- /* Clean up txq in case we're reinitializing it. */
- DEBUG("%p: cleaning-up old txq just in case", (void *)txq);
- txq_cleanup(txq);
- *txq = tmpl;
- DEBUG("%p: txq updated with %p", (void *)txq, (void *)&tmpl);
- assert(ret == 0);
- return 0;
-error:
- txq_cleanup(&tmpl);
- assert(ret > 0);
- return ret;
-}
-
-/**
- * DPDK callback to configure a TX queue.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param idx
- * TX queue index.
- * @param desc
- * Number of descriptors to configure in queue.
- * @param socket
- * NUMA socket on which memory must be allocated.
- * @param[in] conf
- * Thresholds parameters.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
- unsigned int socket, const struct rte_eth_txconf *conf)
-{
- struct priv *priv = dev->data->dev_private;
- struct txq *txq = (*priv->txqs)[idx];
- int ret;
-
- priv_lock(priv);
- DEBUG("%p: configuring queue %u for %u descriptors",
- (void *)dev, idx, desc);
- if (idx >= priv->txqs_n) {
- ERROR("%p: queue index out of range (%u >= %u)",
- (void *)dev, idx, priv->txqs_n);
- priv_unlock(priv);
- return -EOVERFLOW;
- }
- if (txq != NULL) {
- DEBUG("%p: reusing already allocated queue index %u (%p)",
- (void *)dev, idx, (void *)txq);
- if (priv->started) {
- priv_unlock(priv);
- return -EEXIST;
- }
- (*priv->txqs)[idx] = NULL;
- txq_cleanup(txq);
- } else {
- txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0, socket);
- if (txq == NULL) {
- ERROR("%p: unable to allocate queue index %u",
- (void *)dev, idx);
- priv_unlock(priv);
- return -ENOMEM;
- }
- }
- ret = txq_setup(dev, txq, desc, socket, conf);
- if (ret)
- rte_free(txq);
- else {
- txq->stats.idx = idx;
- DEBUG("%p: adding TX queue %p to list",
- (void *)dev, (void *)txq);
- (*priv->txqs)[idx] = txq;
- /* Update send callback. */
- dev->tx_pkt_burst = mlx4_tx_burst;
- }
- priv_unlock(priv);
- return -ret;
-}
-
-/**
- * DPDK callback to release a TX queue.
- *
- * @param dpdk_txq
- * Generic TX queue pointer.
- */
-static void
-mlx4_tx_queue_release(void *dpdk_txq)
-{
- struct txq *txq = (struct txq *)dpdk_txq;
- struct priv *priv;
- unsigned int i;
-
- if (txq == NULL)
- return;
- priv = txq->priv;
- priv_lock(priv);
- for (i = 0; (i != priv->txqs_n); ++i)
- if ((*priv->txqs)[i] == txq) {
- DEBUG("%p: removing TX queue %p from list",
- (void *)priv->dev, (void *)txq);
- (*priv->txqs)[i] = NULL;
- break;
- }
- txq_cleanup(txq);
- rte_free(txq);
- priv_unlock(priv);
-}
-
-/* RX queues handling. */
-
-/**
- * Allocate RX queue elements with scattered packets support.
- *
- * @param rxq
- * Pointer to RX queue structure.
- * @param elts_n
- * Number of elements to allocate.
- * @param[in] pool
- * If not NULL, fetch buffers from this array instead of allocating them
- * with rte_pktmbuf_alloc().
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_alloc_elts_sp(struct rxq *rxq, unsigned int elts_n,
- struct rte_mbuf **pool)
-{
- unsigned int i;
- struct rxq_elt_sp (*elts)[elts_n] =
- rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
- rxq->socket);
- int ret = 0;
-
- if (elts == NULL) {
- ERROR("%p: can't allocate packets array", (void *)rxq);
- ret = ENOMEM;
- goto error;
- }
- /* For each WR (packet). */
- for (i = 0; (i != elts_n); ++i) {
- unsigned int j;
- struct rxq_elt_sp *elt = &(*elts)[i];
- struct ibv_recv_wr *wr = &elt->wr;
- struct ibv_sge (*sges)[(elemof(elt->sges))] = &elt->sges;
-
- /* These two arrays must have the same size. */
- assert(elemof(elt->sges) == elemof(elt->bufs));
- /* Configure WR. */
- wr->wr_id = i;
- wr->next = &(*elts)[(i + 1)].wr;
- wr->sg_list = &(*sges)[0];
- wr->num_sge = elemof(*sges);
- /* For each SGE (segment). */
- for (j = 0; (j != elemof(elt->bufs)); ++j) {
- struct ibv_sge *sge = &(*sges)[j];
- struct rte_mbuf *buf;
-
- if (pool != NULL) {
- buf = *(pool++);
- assert(buf != NULL);
- rte_pktmbuf_reset(buf);
- } else
- buf = rte_pktmbuf_alloc(rxq->mp);
- if (buf == NULL) {
- assert(pool == NULL);
- ERROR("%p: empty mbuf pool", (void *)rxq);
- ret = ENOMEM;
- goto error;
- }
- elt->bufs[j] = buf;
- /* Headroom is reserved by rte_pktmbuf_alloc(). */
- assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
- /* Buffer is supposed to be empty. */
- assert(rte_pktmbuf_data_len(buf) == 0);
- assert(rte_pktmbuf_pkt_len(buf) == 0);
- /* sge->addr must be able to store a pointer. */
- assert(sizeof(sge->addr) >= sizeof(uintptr_t));
- if (j == 0) {
- /* The first SGE keeps its headroom. */
- sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf,
- char *);
- sge->length = (buf->buf_len -
- RTE_PKTMBUF_HEADROOM);
- } else {
- /* Subsequent SGEs lose theirs. */
- assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
- SET_DATA_OFF(buf, 0);
- sge->addr = (uintptr_t)buf->buf_addr;
- sge->length = buf->buf_len;
- }
- sge->lkey = rxq->mr->lkey;
- /* Redundant check for tailroom. */
- assert(sge->length == rte_pktmbuf_tailroom(buf));
- }
- }
- /* The last WR pointer must be NULL. */
- (*elts)[(i - 1)].wr.next = NULL;
- DEBUG("%p: allocated and configured %u WRs (%zu segments)",
- (void *)rxq, elts_n, (elts_n * elemof((*elts)[0].sges)));
- rxq->elts_n = elts_n;
- rxq->elts.sp = elts;
- assert(ret == 0);
- return 0;
-error:
- if (elts != NULL) {
- assert(pool == NULL);
- for (i = 0; (i != elemof(*elts)); ++i) {
- unsigned int j;
- struct rxq_elt_sp *elt = &(*elts)[i];
-
- for (j = 0; (j != elemof(elt->bufs)); ++j) {
- struct rte_mbuf *buf = elt->bufs[j];
-
- if (buf != NULL)
- rte_pktmbuf_free_seg(buf);
- }
- }
- rte_free(elts);
- }
- DEBUG("%p: failed, freed everything", (void *)rxq);
- assert(ret > 0);
- return ret;
-}
-
-/**
- * Free RX queue elements with scattered packets support.
- *
- * @param rxq
- * Pointer to RX queue structure.
- */
-static void
-rxq_free_elts_sp(struct rxq *rxq)
-{
- unsigned int i;
- unsigned int elts_n = rxq->elts_n;
- struct rxq_elt_sp (*elts)[elts_n] = rxq->elts.sp;
-
- DEBUG("%p: freeing WRs", (void *)rxq);
- rxq->elts_n = 0;
- rxq->elts.sp = NULL;
- if (elts == NULL)
- return;
- for (i = 0; (i != elemof(*elts)); ++i) {
- unsigned int j;
- struct rxq_elt_sp *elt = &(*elts)[i];
-
- for (j = 0; (j != elemof(elt->bufs)); ++j) {
- struct rte_mbuf *buf = elt->bufs[j];
-
- if (buf != NULL)
- rte_pktmbuf_free_seg(buf);
- }
- }
- rte_free(elts);
-}
-
-/**
- * Allocate RX queue elements.
- *
- * @param rxq
- * Pointer to RX queue structure.
- * @param elts_n
- * Number of elements to allocate.
- * @param[in] pool
- * If not NULL, fetch buffers from this array instead of allocating them
- * with rte_pktmbuf_alloc().
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_alloc_elts(struct rxq *rxq, unsigned int elts_n, struct rte_mbuf **pool)
-{
- unsigned int i;
- struct rxq_elt (*elts)[elts_n] =
- rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
- rxq->socket);
- int ret = 0;
-
- if (elts == NULL) {
- ERROR("%p: can't allocate packets array", (void *)rxq);
- ret = ENOMEM;
- goto error;
- }
- /* For each WR (packet). */
- for (i = 0; (i != elts_n); ++i) {
- struct rxq_elt *elt = &(*elts)[i];
- struct ibv_recv_wr *wr = &elt->wr;
- struct ibv_sge *sge = &(*elts)[i].sge;
- struct rte_mbuf *buf;
-
- if (pool != NULL) {
- buf = *(pool++);
- assert(buf != NULL);
- rte_pktmbuf_reset(buf);
- } else
- buf = rte_pktmbuf_alloc(rxq->mp);
- if (buf == NULL) {
- assert(pool == NULL);
- ERROR("%p: empty mbuf pool", (void *)rxq);
- ret = ENOMEM;
- goto error;
- }
- /* Configure WR. Work request ID contains its own index in
- * the elts array and the offset between SGE buffer header and
- * its data. */
- WR_ID(wr->wr_id).id = i;
- WR_ID(wr->wr_id).offset =
- (((uintptr_t)buf->buf_addr + RTE_PKTMBUF_HEADROOM) -
- (uintptr_t)buf);
- wr->next = &(*elts)[(i + 1)].wr;
- wr->sg_list = sge;
- wr->num_sge = 1;
- /* Headroom is reserved by rte_pktmbuf_alloc(). */
- assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
- /* Buffer is supposed to be empty. */
- assert(rte_pktmbuf_data_len(buf) == 0);
- assert(rte_pktmbuf_pkt_len(buf) == 0);
- /* sge->addr must be able to store a pointer. */
- assert(sizeof(sge->addr) >= sizeof(uintptr_t));
- /* SGE keeps its headroom. */
- sge->addr = (uintptr_t)
- ((uint8_t *)buf->buf_addr + RTE_PKTMBUF_HEADROOM);
- sge->length = (buf->buf_len - RTE_PKTMBUF_HEADROOM);
- sge->lkey = rxq->mr->lkey;
- /* Redundant check for tailroom. */
- assert(sge->length == rte_pktmbuf_tailroom(buf));
- /* Make sure elts index and SGE mbuf pointer can be deduced
- * from WR ID. */
- if ((WR_ID(wr->wr_id).id != i) ||
- ((void *)(sge->addr - WR_ID(wr->wr_id).offset) != buf)) {
- ERROR("%p: cannot store index and offset in WR ID",
- (void *)rxq);
- sge->addr = 0;
- rte_pktmbuf_free(buf);
- ret = EOVERFLOW;
- goto error;
- }
- }
- /* The last WR pointer must be NULL. */
- (*elts)[(i - 1)].wr.next = NULL;
- DEBUG("%p: allocated and configured %u single-segment WRs",
- (void *)rxq, elts_n);
- rxq->elts_n = elts_n;
- rxq->elts.no_sp = elts;
- assert(ret == 0);
- return 0;
-error:
- if (elts != NULL) {
- assert(pool == NULL);
- for (i = 0; (i != elemof(*elts)); ++i) {
- struct rxq_elt *elt = &(*elts)[i];
- struct rte_mbuf *buf;
-
- if (elt->sge.addr == 0)
- continue;
- assert(WR_ID(elt->wr.wr_id).id == i);
- buf = (void *)
- (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
- rte_pktmbuf_free_seg(buf);
- }
- rte_free(elts);
- }
- DEBUG("%p: failed, freed everything", (void *)rxq);
- assert(ret > 0);
- return ret;
-}
-
-/**
- * Free RX queue elements.
- *
- * @param rxq
- * Pointer to RX queue structure.
- */
-static void
-rxq_free_elts(struct rxq *rxq)
-{
- unsigned int i;
- unsigned int elts_n = rxq->elts_n;
- struct rxq_elt (*elts)[elts_n] = rxq->elts.no_sp;
-
- DEBUG("%p: freeing WRs", (void *)rxq);
- rxq->elts_n = 0;
- rxq->elts.no_sp = NULL;
- if (elts == NULL)
- return;
- for (i = 0; (i != elemof(*elts)); ++i) {
- struct rxq_elt *elt = &(*elts)[i];
- struct rte_mbuf *buf;
-
- if (elt->sge.addr == 0)
- continue;
- assert(WR_ID(elt->wr.wr_id).id == i);
- buf = (void *)(elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
- rte_pktmbuf_free_seg(buf);
- }
- rte_free(elts);
-}
-
-/**
- * Unregister a MAC address from a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- * @param mac_index
- * MAC address index.
- */
-static void
-rxq_mac_addr_del(struct rxq *rxq, unsigned int mac_index)
-{
-#ifndef NDEBUG
- struct priv *priv = rxq->priv;
- const uint8_t (*mac)[ETHER_ADDR_LEN] =
- (const uint8_t (*)[ETHER_ADDR_LEN])
- priv->mac[mac_index].addr_bytes;
-#endif
-
- assert(mac_index < elemof(priv->mac));
- if (!BITFIELD_ISSET(rxq->mac_configured, mac_index)) {
- assert(rxq->mac_flow[mac_index] == NULL);
- return;
- }
- DEBUG("%p: removing MAC address %02x:%02x:%02x:%02x:%02x:%02x"
- " index %u",
- (void *)rxq,
- (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
- mac_index);
- assert(rxq->mac_flow[mac_index] != NULL);
- claim_zero(ibv_exp_destroy_flow(rxq->mac_flow[mac_index]));
- rxq->mac_flow[mac_index] = NULL;
- BITFIELD_RESET(rxq->mac_configured, mac_index);
-}
-
-/**
- * Unregister all MAC addresses from a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- */
-static void
-rxq_mac_addrs_del(struct rxq *rxq)
-{
- struct priv *priv = rxq->priv;
- unsigned int i;
-
- for (i = 0; (i != elemof(priv->mac)); ++i)
- rxq_mac_addr_del(rxq, i);
-}
-
-static int rxq_promiscuous_enable(struct rxq *);
-static void rxq_promiscuous_disable(struct rxq *);
-
-/**
- * Register a MAC address in a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- * @param mac_index
- * MAC address index to register.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_mac_addr_add(struct rxq *rxq, unsigned int mac_index)
-{
- struct priv *priv = rxq->priv;
- const uint8_t (*mac)[ETHER_ADDR_LEN] =
- (const uint8_t (*)[ETHER_ADDR_LEN])
- priv->mac[mac_index].addr_bytes;
- unsigned int vlans = 0;
- unsigned int specs = 0;
- unsigned int i, j;
- struct ibv_exp_flow *flow;
-
- assert(mac_index < elemof(priv->mac));
- if (BITFIELD_ISSET(rxq->mac_configured, mac_index))
- rxq_mac_addr_del(rxq, mac_index);
- /* Number of configured VLANs. */
- for (i = 0; (i != elemof(priv->vlan_filter)); ++i)
- if (priv->vlan_filter[i].enabled)
- ++vlans;
- specs = (vlans ? vlans : 1);
-
- /* Allocate flow specification on the stack. */
- struct ibv_exp_flow_attr data
- [1 +
- (sizeof(struct ibv_exp_flow_spec_eth[specs]) /
- sizeof(struct ibv_exp_flow_attr)) +
- !!(sizeof(struct ibv_exp_flow_spec_eth[specs]) %
- sizeof(struct ibv_exp_flow_attr))];
- struct ibv_exp_flow_attr *attr = (void *)&data[0];
- struct ibv_exp_flow_spec_eth *spec = (void *)&data[1];
-
- /*
- * No padding must be inserted by the compiler between attr and spec.
- * This layout is expected by libibverbs.
- */
- assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec);
- *attr = (struct ibv_exp_flow_attr){
- .type = IBV_EXP_FLOW_ATTR_NORMAL,
- .num_of_specs = specs,
- .port = priv->port,
- .flags = 0
- };
- *spec = (struct ibv_exp_flow_spec_eth){
- .type = IBV_EXP_FLOW_SPEC_ETH,
- .size = sizeof(*spec),
- .val = {
- .dst_mac = {
- (*mac)[0], (*mac)[1], (*mac)[2],
- (*mac)[3], (*mac)[4], (*mac)[5]
- }
- },
- .mask = {
- .dst_mac = "\xff\xff\xff\xff\xff\xff",
- .vlan_tag = (vlans ? htons(0xfff) : 0)
- }
- };
- /* Fill VLAN specifications. */
- for (i = 0, j = 0; (i != elemof(priv->vlan_filter)); ++i) {
- if (!priv->vlan_filter[i].enabled)
- continue;
- assert(j != vlans);
- if (j)
- spec[j] = spec[0];
- spec[j].val.vlan_tag = htons(priv->vlan_filter[i].id);
- ++j;
- }
- DEBUG("%p: adding MAC address %02x:%02x:%02x:%02x:%02x:%02x index %u"
- " (%u VLAN(s) configured)",
- (void *)rxq,
- (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
- mac_index,
- vlans);
- /* Create related flow. */
- errno = 0;
- flow = ibv_exp_create_flow(rxq->qp, attr);
- if (flow == NULL) {
- int err = errno;
-
- /* Flow creation failure is not fatal when in DMFS A0 mode.
- * Ignore error if promiscuity is already enabled or can be
- * enabled. */
- if (priv->promisc_ok)
- return 0;
- if ((rxq->promisc_flow != NULL) ||
- (rxq_promiscuous_enable(rxq) == 0)) {
- if (rxq->promisc_flow != NULL)
- rxq_promiscuous_disable(rxq);
- WARN("cannot configure normal flow but promiscuous"
- " mode is fine, assuming promiscuous optimization"
- " is enabled"
- " (options mlx4_core log_num_mgm_entry_size=-7)");
- priv->promisc_ok = 1;
- return 0;
- }
- errno = err;
- /* It's not clear whether errno is always set in this case. */
- ERROR("%p: flow configuration failed, errno=%d: %s",
- (void *)rxq, errno,
- (errno ? strerror(errno) : "Unknown error"));
- if (errno)
- return errno;
- return EINVAL;
- }
- assert(rxq->mac_flow[mac_index] == NULL);
- rxq->mac_flow[mac_index] = flow;
- BITFIELD_SET(rxq->mac_configured, mac_index);
- return 0;
-}
-
-/**
- * Register all MAC addresses in a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_mac_addrs_add(struct rxq *rxq)
-{
- struct priv *priv = rxq->priv;
- unsigned int i;
- int ret;
-
- for (i = 0; (i != elemof(priv->mac)); ++i) {
- if (!BITFIELD_ISSET(priv->mac_configured, i))
- continue;
- ret = rxq_mac_addr_add(rxq, i);
- if (!ret)
- continue;
- /* Failure, rollback. */
- while (i != 0)
- rxq_mac_addr_del(rxq, --i);
- assert(ret > 0);
- return ret;
- }
- return 0;
-}
-
-/**
- * Unregister a MAC address.
- *
- * In RSS mode, the MAC address is unregistered from the parent queue,
- * otherwise it is unregistered from each queue directly.
- *
- * @param priv
- * Pointer to private structure.
- * @param mac_index
- * MAC address index.
- */
-static void
-priv_mac_addr_del(struct priv *priv, unsigned int mac_index)
-{
- unsigned int i;
-
- assert(mac_index < elemof(priv->mac));
- if (!BITFIELD_ISSET(priv->mac_configured, mac_index))
- return;
- if (priv->rss) {
- rxq_mac_addr_del(&priv->rxq_parent, mac_index);
- goto end;
- }
- for (i = 0; (i != priv->dev->data->nb_rx_queues); ++i)
- rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
-end:
- BITFIELD_RESET(priv->mac_configured, mac_index);
-}
-
-/**
- * Register a MAC address.
- *
- * In RSS mode, the MAC address is registered in the parent queue,
- * otherwise it is registered in each queue directly.
- *
- * @param priv
- * Pointer to private structure.
- * @param mac_index
- * MAC address index to use.
- * @param mac
- * MAC address to register.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-priv_mac_addr_add(struct priv *priv, unsigned int mac_index,
- const uint8_t (*mac)[ETHER_ADDR_LEN])
-{
- unsigned int i;
- int ret;
-
- assert(mac_index < elemof(priv->mac));
- /* First, make sure this address isn't already configured. */
- for (i = 0; (i != elemof(priv->mac)); ++i) {
- /* Skip this index, it's going to be reconfigured. */
- if (i == mac_index)
- continue;
- if (!BITFIELD_ISSET(priv->mac_configured, i))
- continue;
- if (memcmp(priv->mac[i].addr_bytes, *mac, sizeof(*mac)))
- continue;
- /* Address already configured elsewhere, return with error. */
- return EADDRINUSE;
- }
- if (BITFIELD_ISSET(priv->mac_configured, mac_index))
- priv_mac_addr_del(priv, mac_index);
- priv->mac[mac_index] = (struct ether_addr){
- {
- (*mac)[0], (*mac)[1], (*mac)[2],
- (*mac)[3], (*mac)[4], (*mac)[5]
- }
- };
- /* If device isn't started, this is all we need to do. */
- if (!priv->started) {
-#ifndef NDEBUG
- /* Verify that all queues have this index disabled. */
- for (i = 0; (i != priv->rxqs_n); ++i) {
- if ((*priv->rxqs)[i] == NULL)
- continue;
- assert(!BITFIELD_ISSET
- ((*priv->rxqs)[i]->mac_configured, mac_index));
- }
-#endif
- goto end;
- }
- if (priv->rss) {
- ret = rxq_mac_addr_add(&priv->rxq_parent, mac_index);
- if (ret)
- return ret;
- goto end;
- }
- for (i = 0; (i != priv->rxqs_n); ++i) {
- if ((*priv->rxqs)[i] == NULL)
- continue;
- ret = rxq_mac_addr_add((*priv->rxqs)[i], mac_index);
- if (!ret)
- continue;
- /* Failure, rollback. */
- while (i != 0)
- if ((*priv->rxqs)[(--i)] != NULL)
- rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
- return ret;
- }
-end:
- BITFIELD_SET(priv->mac_configured, mac_index);
- return 0;
-}
-
-/**
- * Enable allmulti mode in a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_allmulticast_enable(struct rxq *rxq)
-{
- struct ibv_exp_flow *flow;
- struct ibv_exp_flow_attr attr = {
- .type = IBV_EXP_FLOW_ATTR_MC_DEFAULT,
- .num_of_specs = 0,
- .port = rxq->priv->port,
- .flags = 0
- };
-
- DEBUG("%p: enabling allmulticast mode", (void *)rxq);
- if (rxq->allmulti_flow != NULL)
- return EBUSY;
- errno = 0;
- flow = ibv_exp_create_flow(rxq->qp, &attr);
- if (flow == NULL) {
- /* It's not clear whether errno is always set in this case. */
- ERROR("%p: flow configuration failed, errno=%d: %s",
- (void *)rxq, errno,
- (errno ? strerror(errno) : "Unknown error"));
- if (errno)
- return errno;
- return EINVAL;
- }
- rxq->allmulti_flow = flow;
- DEBUG("%p: allmulticast mode enabled", (void *)rxq);
- return 0;
-}
-
-/**
- * Disable allmulti mode in a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- */
-static void
-rxq_allmulticast_disable(struct rxq *rxq)
-{
- DEBUG("%p: disabling allmulticast mode", (void *)rxq);
- if (rxq->allmulti_flow == NULL)
- return;
- claim_zero(ibv_exp_destroy_flow(rxq->allmulti_flow));
- rxq->allmulti_flow = NULL;
- DEBUG("%p: allmulticast mode disabled", (void *)rxq);
-}
-
-/**
- * Enable promiscuous mode in a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_promiscuous_enable(struct rxq *rxq)
-{
- struct ibv_exp_flow *flow;
- struct ibv_exp_flow_attr attr = {
- .type = IBV_EXP_FLOW_ATTR_ALL_DEFAULT,
- .num_of_specs = 0,
- .port = rxq->priv->port,
- .flags = 0
- };
-
- if (rxq->priv->vf)
- return 0;
- DEBUG("%p: enabling promiscuous mode", (void *)rxq);
- if (rxq->promisc_flow != NULL)
- return EBUSY;
- errno = 0;
- flow = ibv_exp_create_flow(rxq->qp, &attr);
- if (flow == NULL) {
- /* It's not clear whether errno is always set in this case. */
- ERROR("%p: flow configuration failed, errno=%d: %s",
- (void *)rxq, errno,
- (errno ? strerror(errno) : "Unknown error"));
- if (errno)
- return errno;
- return EINVAL;
- }
- rxq->promisc_flow = flow;
- DEBUG("%p: promiscuous mode enabled", (void *)rxq);
- return 0;
-}
-
-/**
- * Disable promiscuous mode in a RX queue.
- *
- * @param rxq
- * Pointer to RX queue structure.
- */
-static void
-rxq_promiscuous_disable(struct rxq *rxq)
-{
- if (rxq->priv->vf)
- return;
- DEBUG("%p: disabling promiscuous mode", (void *)rxq);
- if (rxq->promisc_flow == NULL)
- return;
- claim_zero(ibv_exp_destroy_flow(rxq->promisc_flow));
- rxq->promisc_flow = NULL;
- DEBUG("%p: promiscuous mode disabled", (void *)rxq);
-}
-
-/**
- * Clean up a RX queue.
- *
- * Destroy objects, free allocated memory and reset the structure for reuse.
- *
- * @param rxq
- * Pointer to RX queue structure.
- */
-static void
-rxq_cleanup(struct rxq *rxq)
-{
- DEBUG("cleaning up %p", (void *)rxq);
- if (rxq->sp)
- rxq_free_elts_sp(rxq);
- else
- rxq_free_elts(rxq);
- if (rxq->qp != NULL) {
- rxq_promiscuous_disable(rxq);
- rxq_allmulticast_disable(rxq);
- rxq_mac_addrs_del(rxq);
- claim_zero(ibv_destroy_qp(rxq->qp));
- }
- if (rxq->cq != NULL)
- claim_zero(ibv_destroy_cq(rxq->cq));
- if (rxq->mr != NULL)
- claim_zero(ibv_dereg_mr(rxq->mr));
- memset(rxq, 0, sizeof(*rxq));
-}
-
-static uint16_t
-mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n);
-
-/**
- * DPDK callback for RX with scattered packets support.
- *
- * @param dpdk_rxq
- * Generic pointer to RX queue structure.
- * @param[out] pkts
- * Array to store received packets.
- * @param pkts_n
- * Maximum number of packets in array.
- *
- * @return
- * Number of packets successfully received (<= pkts_n).
- */
-static uint16_t
-mlx4_rx_burst_sp(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
-{
- struct rxq *rxq = (struct rxq *)dpdk_rxq;
- struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
- struct ibv_wc wcs[pkts_n];
- struct ibv_recv_wr head;
- struct ibv_recv_wr **next = &head.next;
- struct ibv_recv_wr *bad_wr;
- int ret = 0;
- int wcs_n;
- int i;
-
- if (unlikely(!rxq->sp))
- return mlx4_rx_burst(dpdk_rxq, pkts, pkts_n);
- if (unlikely(elts == NULL)) /* See RTE_DEV_CMD_SET_MTU. */
- return 0;
- wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
- if (unlikely(wcs_n == 0))
- return 0;
- if (unlikely(wcs_n < 0)) {
- DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
- (void *)rxq, wcs_n);
- return 0;
- }
- assert(wcs_n <= (int)pkts_n);
- /* For each work completion. */
- for (i = 0; (i != wcs_n); ++i) {
- struct ibv_wc *wc = &wcs[i];
- uint64_t wr_id = wc->wr_id;
- uint32_t len = wc->byte_len;
- struct rxq_elt_sp *elt = &(*elts)[wr_id];
- struct ibv_recv_wr *wr = &elt->wr;
- struct rte_mbuf *pkt_buf = NULL; /* Buffer returned in pkts. */
- struct rte_mbuf **pkt_buf_next = &pkt_buf;
- unsigned int seg_headroom = RTE_PKTMBUF_HEADROOM;
- unsigned int j = 0;
-
- /* Sanity checks. */
- assert(wr_id < rxq->elts_n);
- assert(wr_id == wr->wr_id);
- assert(wr->sg_list == elt->sges);
- assert(wr->num_sge == elemof(elt->sges));
- /* Link completed WRs together for repost. */
- *next = wr;
- next = &wr->next;
- if (unlikely(wc->status != IBV_WC_SUCCESS)) {
- /* Whatever, just repost the offending WR. */
- DEBUG("rxq=%p, wr_id=%" PRIu64 ": bad work completion"
- " status (%d): %s",
- (void *)rxq, wc->wr_id, wc->status,
- ibv_wc_status_str(wc->status));
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increase dropped packets counter. */
- ++rxq->stats.idropped;
-#endif
- goto repost;
- }
- /*
- * Replace spent segments with new ones, concatenate and
- * return them as pkt_buf.
- */
- while (1) {
- struct ibv_sge *sge = &elt->sges[j];
- struct rte_mbuf *seg = elt->bufs[j];
- struct rte_mbuf *rep;
- unsigned int seg_tailroom;
-
- /*
- * Fetch initial bytes of packet descriptor into a
- * cacheline while allocating rep.
- */
- rte_prefetch0(seg);
- rep = __rte_mbuf_raw_alloc(rxq->mp);
- if (unlikely(rep == NULL)) {
- /*
- * Unable to allocate a replacement mbuf,
- * repost WR.
- */
- DEBUG("rxq=%p, wr_id=%" PRIu64 ":"
- " can't allocate a new mbuf",
- (void *)rxq, wr_id);
- if (pkt_buf != NULL)
- rte_pktmbuf_free(pkt_buf);
- /* Increase out of memory counters. */
- ++rxq->stats.rx_nombuf;
- ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
- goto repost;
- }
-#ifndef NDEBUG
- /* Poison user-modifiable fields in rep. */
- NEXT(rep) = (void *)((uintptr_t)-1);
- SET_DATA_OFF(rep, 0xdead);
- DATA_LEN(rep) = 0xd00d;
- PKT_LEN(rep) = 0xdeadd00d;
- NB_SEGS(rep) = 0x2a;
- PORT(rep) = 0x2a;
- rep->ol_flags = -1;
-#endif
- assert(rep->buf_len == seg->buf_len);
- assert(rep->buf_len == rxq->mb_len);
- /* Reconfigure sge to use rep instead of seg. */
- assert(sge->lkey == rxq->mr->lkey);
- sge->addr = ((uintptr_t)rep->buf_addr + seg_headroom);
- elt->bufs[j] = rep;
- ++j;
- /* Update pkt_buf if it's the first segment, or link
- * seg to the previous one and update pkt_buf_next. */
- *pkt_buf_next = seg;
- pkt_buf_next = &NEXT(seg);
- /* Update seg information. */
- seg_tailroom = (seg->buf_len - seg_headroom);
- assert(sge->length == seg_tailroom);
- SET_DATA_OFF(seg, seg_headroom);
- if (likely(len <= seg_tailroom)) {
- /* Last segment. */
- DATA_LEN(seg) = len;
- PKT_LEN(seg) = len;
- /* Sanity check. */
- assert(rte_pktmbuf_headroom(seg) ==
- seg_headroom);
- assert(rte_pktmbuf_tailroom(seg) ==
- (seg_tailroom - len));
- break;
- }
- DATA_LEN(seg) = seg_tailroom;
- PKT_LEN(seg) = seg_tailroom;
- /* Sanity check. */
- assert(rte_pktmbuf_headroom(seg) == seg_headroom);
- assert(rte_pktmbuf_tailroom(seg) == 0);
- /* Fix len and clear headroom for next segments. */
- len -= seg_tailroom;
- seg_headroom = 0;
- }
- /* Update head and tail segments. */
- *pkt_buf_next = NULL;
- assert(pkt_buf != NULL);
- assert(j != 0);
- NB_SEGS(pkt_buf) = j;
- PORT(pkt_buf) = rxq->port_id;
- PKT_LEN(pkt_buf) = wc->byte_len;
- pkt_buf->ol_flags = 0;
-
- /* Return packet. */
- *(pkts++) = pkt_buf;
- ++ret;
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increase bytes counter. */
- rxq->stats.ibytes += wc->byte_len;
-#endif
-repost:
- continue;
- }
- *next = NULL;
- /* Repost WRs. */
-#ifdef DEBUG_RECV
- DEBUG("%p: reposting %d WRs starting from %" PRIu64 " (%p)",
- (void *)rxq, wcs_n, wcs[0].wr_id, (void *)head.next);
-#endif
- i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
- if (unlikely(i)) {
- /* Inability to repost WRs is fatal. */
- DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
- (void *)rxq->priv,
- (void *)bad_wr,
- strerror(i));
- abort();
- }
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increase packets counter. */
- rxq->stats.ipackets += ret;
-#endif
- return ret;
-}
-
-/**
- * DPDK callback for RX.
- *
- * The following function is the same as mlx4_rx_burst_sp(), except it doesn't
- * manage scattered packets. Improves performance when MRU is lower than the
- * size of the first segment.
- *
- * @param dpdk_rxq
- * Generic pointer to RX queue structure.
- * @param[out] pkts
- * Array to store received packets.
- * @param pkts_n
- * Maximum number of packets in array.
- *
- * @return
- * Number of packets successfully received (<= pkts_n).
- */
-static uint16_t
-mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
-{
- struct rxq *rxq = (struct rxq *)dpdk_rxq;
- struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
- struct ibv_wc wcs[pkts_n];
- struct ibv_recv_wr head;
- struct ibv_recv_wr **next = &head.next;
- struct ibv_recv_wr *bad_wr;
- int ret = 0;
- int wcs_n;
- int i;
-
- if (unlikely(rxq->sp))
- return mlx4_rx_burst_sp(dpdk_rxq, pkts, pkts_n);
- wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
- if (unlikely(wcs_n == 0))
- return 0;
- if (unlikely(wcs_n < 0)) {
- DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
- (void *)rxq, wcs_n);
- return 0;
- }
- assert(wcs_n <= (int)pkts_n);
- /* For each work completion. */
- for (i = 0; (i != wcs_n); ++i) {
- struct ibv_wc *wc = &wcs[i];
- uint64_t wr_id = wc->wr_id;
- uint32_t len = wc->byte_len;
- struct rxq_elt *elt = &(*elts)[WR_ID(wr_id).id];
- struct ibv_recv_wr *wr = &elt->wr;
- struct rte_mbuf *seg =
- (void *)(elt->sge.addr - WR_ID(wr_id).offset);
- struct rte_mbuf *rep;
-
- /* Sanity checks. */
- assert(WR_ID(wr_id).id < rxq->elts_n);
- assert(wr_id == wr->wr_id);
- assert(wr->sg_list == &elt->sge);
- assert(wr->num_sge == 1);
- /* Link completed WRs together for repost. */
- *next = wr;
- next = &wr->next;
- if (unlikely(wc->status != IBV_WC_SUCCESS)) {
- /* Whatever, just repost the offending WR. */
- DEBUG("rxq=%p, wr_id=%" PRIu32 ": bad work completion"
- " status (%d): %s",
- (void *)rxq, WR_ID(wr_id).id, wc->status,
- ibv_wc_status_str(wc->status));
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increase dropped packets counter. */
- ++rxq->stats.idropped;
-#endif
- goto repost;
- }
- /*
- * Fetch initial bytes of packet descriptor into a
- * cacheline while allocating rep.
- */
- rte_prefetch0(seg);
- rep = __rte_mbuf_raw_alloc(rxq->mp);
- if (unlikely(rep == NULL)) {
- /*
- * Unable to allocate a replacement mbuf,
- * repost WR.
- */
- DEBUG("rxq=%p, wr_id=%" PRIu32 ":"
- " can't allocate a new mbuf",
- (void *)rxq, WR_ID(wr_id).id);
- /* Increase out of memory counters. */
- ++rxq->stats.rx_nombuf;
- ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
- goto repost;
- }
-
- /* Reconfigure sge to use rep instead of seg. */
- elt->sge.addr = (uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM;
- assert(elt->sge.lkey == rxq->mr->lkey);
- WR_ID(wr->wr_id).offset =
- (((uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM) -
- (uintptr_t)rep);
- assert(WR_ID(wr->wr_id).id == WR_ID(wr_id).id);
-
- /* Update seg information. */
- SET_DATA_OFF(seg, RTE_PKTMBUF_HEADROOM);
- NB_SEGS(seg) = 1;
- PORT(seg) = rxq->port_id;
- NEXT(seg) = NULL;
- PKT_LEN(seg) = len;
- DATA_LEN(seg) = len;
- seg->ol_flags = 0;
-
- /* Return packet. */
- *(pkts++) = seg;
- ++ret;
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increase bytes counter. */
- rxq->stats.ibytes += wc->byte_len;
-#endif
-repost:
- continue;
- }
- *next = NULL;
- /* Repost WRs. */
-#ifdef DEBUG_RECV
- DEBUG("%p: reposting %d WRs starting from %" PRIu32 " (%p)",
- (void *)rxq, wcs_n, WR_ID(wcs[0].wr_id).id, (void *)head.next);
-#endif
- i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
- if (unlikely(i)) {
- /* Inability to repost WRs is fatal. */
- DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
- (void *)rxq->priv,
- (void *)bad_wr,
- strerror(i));
- abort();
- }
-#ifdef MLX4_PMD_SOFT_COUNTERS
- /* Increase packets counter. */
- rxq->stats.ipackets += ret;
-#endif
- return ret;
-}
-
-#ifdef INLINE_RECV
-
-/**
- * Allocate a Queue Pair in case inline receive is supported.
- *
- * @param priv
- * Pointer to private structure.
- * @param cq
- * Completion queue to associate with QP.
- * @param desc
- * Number of descriptors in QP (hint only).
- *
- * @return
- * QP pointer or NULL in case of error.
- */
-static struct ibv_qp *
-rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
-{
- struct ibv_exp_qp_init_attr attr = {
- /* CQ to be associated with the send queue. */
- .send_cq = cq,
- /* CQ to be associated with the receive queue. */
- .recv_cq = cq,
- .max_inl_recv = priv->inl_recv_size,
- .cap = {
- /* Max number of outstanding WRs. */
- .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
- priv->device_attr.max_qp_wr :
- desc),
- /* Max number of scatter/gather elements in a WR. */
- .max_recv_sge = ((priv->device_attr.max_sge <
- MLX4_PMD_SGE_WR_N) ?
- priv->device_attr.max_sge :
- MLX4_PMD_SGE_WR_N),
- },
- .qp_type = IBV_QPT_RAW_PACKET,
- .pd = priv->pd
- };
-
- attr.comp_mask = IBV_EXP_QP_INIT_ATTR_PD;
- attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
-
- return ibv_exp_create_qp(priv->ctx, &attr);
-}
-
-#else /* INLINE_RECV */
-
-/**
- * Allocate a Queue Pair.
- *
- * @param priv
- * Pointer to private structure.
- * @param cq
- * Completion queue to associate with QP.
- * @param desc
- * Number of descriptors in QP (hint only).
- *
- * @return
- * QP pointer or NULL in case of error.
- */
-static struct ibv_qp *
-rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
-{
- struct ibv_qp_init_attr attr = {
- /* CQ to be associated with the send queue. */
- .send_cq = cq,
- /* CQ to be associated with the receive queue. */
- .recv_cq = cq,
- .cap = {
- /* Max number of outstanding WRs. */
- .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
- priv->device_attr.max_qp_wr :
- desc),
- /* Max number of scatter/gather elements in a WR. */
- .max_recv_sge = ((priv->device_attr.max_sge <
- MLX4_PMD_SGE_WR_N) ?
- priv->device_attr.max_sge :
- MLX4_PMD_SGE_WR_N),
- },
- .qp_type = IBV_QPT_RAW_PACKET
- };
-
- return ibv_create_qp(priv->pd, &attr);
-}
-
-#endif /* INLINE_RECV */
-
-#ifdef RSS_SUPPORT
-
-/**
- * Allocate a RSS Queue Pair.
- *
- * @param priv
- * Pointer to private structure.
- * @param cq
- * Completion queue to associate with QP.
- * @param desc
- * Number of descriptors in QP (hint only).
- * @param parent
- * If nonzero, create a parent QP, otherwise a child.
- *
- * @return
- * QP pointer or NULL in case of error.
- */
-static struct ibv_qp *
-rxq_setup_qp_rss(struct priv *priv, struct ibv_cq *cq, uint16_t desc,
- int parent)
-{
- struct ibv_exp_qp_init_attr attr = {
- /* CQ to be associated with the send queue. */
- .send_cq = cq,
- /* CQ to be associated with the receive queue. */
- .recv_cq = cq,
-#ifdef INLINE_RECV
- .max_inl_recv = priv->inl_recv_size,
-#endif
- .cap = {
- /* Max number of outstanding WRs. */
- .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
- priv->device_attr.max_qp_wr :
- desc),
- /* Max number of scatter/gather elements in a WR. */
- .max_recv_sge = ((priv->device_attr.max_sge <
- MLX4_PMD_SGE_WR_N) ?
- priv->device_attr.max_sge :
- MLX4_PMD_SGE_WR_N),
- },
- .qp_type = IBV_QPT_RAW_PACKET,
- .comp_mask = (IBV_EXP_QP_INIT_ATTR_PD |
- IBV_EXP_QP_INIT_ATTR_QPG),
- .pd = priv->pd
- };
-
-#ifdef INLINE_RECV
- attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
-#endif
- if (parent) {
- attr.qpg.qpg_type = IBV_EXP_QPG_PARENT;
- /* TSS isn't necessary. */
- attr.qpg.parent_attrib.tss_child_count = 0;
- attr.qpg.parent_attrib.rss_child_count = priv->rxqs_n;
- DEBUG("initializing parent RSS queue");
- } else {
- attr.qpg.qpg_type = IBV_EXP_QPG_CHILD_RX;
- attr.qpg.qpg_parent = priv->rxq_parent.qp;
- DEBUG("initializing child RSS queue");
- }
- return ibv_exp_create_qp(priv->ctx, &attr);
-}
-
-#endif /* RSS_SUPPORT */
-
-/**
- * Reconfigure a RX queue with new parameters.
- *
- * rxq_rehash() does not allocate mbufs, which, if not done from the right
- * thread (such as a control thread), may corrupt the pool.
- * In case of failure, the queue is left untouched.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param rxq
- * RX queue pointer.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_rehash(struct rte_eth_dev *dev, struct rxq *rxq)
-{
- struct priv *priv = rxq->priv;
- struct rxq tmpl = *rxq;
- unsigned int mbuf_n;
- unsigned int desc_n;
- struct rte_mbuf **pool;
- unsigned int i, k;
- struct ibv_exp_qp_attr mod;
- struct ibv_recv_wr *bad_wr;
- int err;
- int parent = (rxq == &priv->rxq_parent);
-
- if (parent) {
- ERROR("%p: cannot rehash parent queue %p",
- (void *)dev, (void *)rxq);
- return EINVAL;
- }
- DEBUG("%p: rehashing queue %p", (void *)dev, (void *)rxq);
- /* Number of descriptors and mbufs currently allocated. */
- desc_n = (tmpl.elts_n * (tmpl.sp ? MLX4_PMD_SGE_WR_N : 1));
- mbuf_n = desc_n;
- /* Enable scattered packets support for this queue if necessary. */
- if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
- (dev->data->dev_conf.rxmode.max_rx_pkt_len >
- (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
- tmpl.sp = 1;
- desc_n /= MLX4_PMD_SGE_WR_N;
- } else
- tmpl.sp = 0;
- DEBUG("%p: %s scattered packets support (%u WRs)",
- (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc_n);
- /* If scatter mode is the same as before, nothing to do. */
- if (tmpl.sp == rxq->sp) {
- DEBUG("%p: nothing to do", (void *)dev);
- return 0;
- }
- /* Remove attached flows if RSS is disabled (no parent queue). */
- if (!priv->rss) {
- rxq_allmulticast_disable(&tmpl);
- rxq_promiscuous_disable(&tmpl);
- rxq_mac_addrs_del(&tmpl);
- /* Update original queue in case of failure. */
- rxq->allmulti_flow = tmpl.allmulti_flow;
- rxq->promisc_flow = tmpl.promisc_flow;
- memcpy(rxq->mac_configured, tmpl.mac_configured,
- sizeof(rxq->mac_configured));
- memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
- }
- /* From now on, any failure will render the queue unusable.
- * Reinitialize QP. */
- mod = (struct ibv_exp_qp_attr){ .qp_state = IBV_QPS_RESET };
- err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
- if (err) {
- ERROR("%p: cannot reset QP: %s", (void *)dev, strerror(err));
- assert(err > 0);
- return err;
- }
- err = ibv_resize_cq(tmpl.cq, desc_n);
- if (err) {
- ERROR("%p: cannot resize CQ: %s", (void *)dev, strerror(err));
- assert(err > 0);
- return err;
- }
- mod = (struct ibv_exp_qp_attr){
- /* Move the QP to this state. */
- .qp_state = IBV_QPS_INIT,
- /* Primary port number. */
- .port_num = priv->port
- };
- err = ibv_exp_modify_qp(tmpl.qp, &mod,
- (IBV_EXP_QP_STATE |
-#ifdef RSS_SUPPORT
- (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
-#endif /* RSS_SUPPORT */
- IBV_EXP_QP_PORT));
- if (err) {
- ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
- (void *)dev, strerror(err));
- assert(err > 0);
- return err;
- };
- /* Reconfigure flows. Do not care for errors. */
- if (!priv->rss) {
- rxq_mac_addrs_add(&tmpl);
- if (priv->promisc)
- rxq_promiscuous_enable(&tmpl);
- if (priv->allmulti)
- rxq_allmulticast_enable(&tmpl);
- /* Update original queue in case of failure. */
- rxq->allmulti_flow = tmpl.allmulti_flow;
- rxq->promisc_flow = tmpl.promisc_flow;
- memcpy(rxq->mac_configured, tmpl.mac_configured,
- sizeof(rxq->mac_configured));
- memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
- }
- /* Allocate pool. */
- pool = rte_malloc(__func__, (mbuf_n * sizeof(*pool)), 0);
- if (pool == NULL) {
- ERROR("%p: cannot allocate memory", (void *)dev);
- return ENOBUFS;
- }
- /* Snatch mbufs from original queue. */
- k = 0;
- if (rxq->sp) {
- struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
-
- for (i = 0; (i != elemof(*elts)); ++i) {
- struct rxq_elt_sp *elt = &(*elts)[i];
- unsigned int j;
-
- for (j = 0; (j != elemof(elt->bufs)); ++j) {
- assert(elt->bufs[j] != NULL);
- pool[k++] = elt->bufs[j];
- }
- }
- } else {
- struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
-
- for (i = 0; (i != elemof(*elts)); ++i) {
- struct rxq_elt *elt = &(*elts)[i];
- struct rte_mbuf *buf = (void *)
- (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
-
- assert(WR_ID(elt->wr.wr_id).id == i);
- pool[k++] = buf;
- }
- }
- assert(k == mbuf_n);
- tmpl.elts_n = 0;
- tmpl.elts.sp = NULL;
- assert((void *)&tmpl.elts.sp == (void *)&tmpl.elts.no_sp);
- err = ((tmpl.sp) ?
- rxq_alloc_elts_sp(&tmpl, desc_n, pool) :
- rxq_alloc_elts(&tmpl, desc_n, pool));
- if (err) {
- ERROR("%p: cannot reallocate WRs, aborting", (void *)dev);
- rte_free(pool);
- assert(err > 0);
- return err;
- }
- assert(tmpl.elts_n == desc_n);
- assert(tmpl.elts.sp != NULL);
- rte_free(pool);
- /* Clean up original data. */
- rxq->elts_n = 0;
- rte_free(rxq->elts.sp);
- rxq->elts.sp = NULL;
- /* Post WRs. */
- err = ibv_post_recv(tmpl.qp,
- (tmpl.sp ?
- &(*tmpl.elts.sp)[0].wr :
- &(*tmpl.elts.no_sp)[0].wr),
- &bad_wr);
- if (err) {
- ERROR("%p: ibv_post_recv() failed for WR %p: %s",
- (void *)dev,
- (void *)bad_wr,
- strerror(err));
- goto skip_rtr;
- }
- mod = (struct ibv_exp_qp_attr){
- .qp_state = IBV_QPS_RTR
- };
- err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
- if (err)
- ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
- (void *)dev, strerror(err));
-skip_rtr:
- *rxq = tmpl;
- assert(err >= 0);
- return err;
-}
-
-/**
- * Configure a RX queue.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param rxq
- * Pointer to RX queue structure.
- * @param desc
- * Number of descriptors to configure in queue.
- * @param socket
- * NUMA socket on which memory must be allocated.
- * @param[in] conf
- * Thresholds parameters.
- * @param mp
- * Memory pool for buffer allocations.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
- unsigned int socket, const struct rte_eth_rxconf *conf,
- struct rte_mempool *mp)
-{
- struct priv *priv = dev->data->dev_private;
- struct rxq tmpl = {
- .priv = priv,
- .mp = mp,
- .socket = socket
- };
- struct ibv_exp_qp_attr mod;
- struct ibv_recv_wr *bad_wr;
- struct rte_mbuf *buf;
- int ret = 0;
- int parent = (rxq == &priv->rxq_parent);
-
- (void)conf; /* Thresholds configuration (ignored). */
- /*
- * If this is a parent queue, hardware must support RSS and
- * RSS must be enabled.
- */
- assert((!parent) || ((priv->hw_rss) && (priv->rss)));
- if (parent) {
- /* Even if unused, ibv_create_cq() requires at least one
- * descriptor. */
- desc = 1;
- goto skip_mr;
- }
- if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
- ERROR("%p: invalid number of RX descriptors (must be a"
- " multiple of %d)", (void *)dev, desc);
- return EINVAL;
- }
- /* Get mbuf length. */
- buf = rte_pktmbuf_alloc(mp);
- if (buf == NULL) {
- ERROR("%p: unable to allocate mbuf", (void *)dev);
- return ENOMEM;
- }
- tmpl.mb_len = buf->buf_len;
- assert((rte_pktmbuf_headroom(buf) +
- rte_pktmbuf_tailroom(buf)) == tmpl.mb_len);
- assert(rte_pktmbuf_headroom(buf) == RTE_PKTMBUF_HEADROOM);
- rte_pktmbuf_free(buf);
- /* Enable scattered packets support for this queue if necessary. */
- if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
- (dev->data->dev_conf.rxmode.max_rx_pkt_len >
- (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
- tmpl.sp = 1;
- desc /= MLX4_PMD_SGE_WR_N;
- }
- DEBUG("%p: %s scattered packets support (%u WRs)",
- (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc);
- /* Use the entire RX mempool as the memory region. */
- tmpl.mr = ibv_reg_mr(priv->pd,
- (void *)mp->elt_va_start,
- (mp->elt_va_end - mp->elt_va_start),
- (IBV_ACCESS_LOCAL_WRITE |
- IBV_ACCESS_REMOTE_WRITE));
- if (tmpl.mr == NULL) {
- ret = EINVAL;
- ERROR("%p: MR creation failure: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
-skip_mr:
- tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
- if (tmpl.cq == NULL) {
- ret = ENOMEM;
- ERROR("%p: CQ creation failure: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- DEBUG("priv->device_attr.max_qp_wr is %d",
- priv->device_attr.max_qp_wr);
- DEBUG("priv->device_attr.max_sge is %d",
- priv->device_attr.max_sge);
-#ifdef RSS_SUPPORT
- if (priv->rss)
- tmpl.qp = rxq_setup_qp_rss(priv, tmpl.cq, desc, parent);
- else
-#endif /* RSS_SUPPORT */
- tmpl.qp = rxq_setup_qp(priv, tmpl.cq, desc);
- if (tmpl.qp == NULL) {
- ret = (errno ? errno : EINVAL);
- ERROR("%p: QP creation failure: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- mod = (struct ibv_exp_qp_attr){
- /* Move the QP to this state. */
- .qp_state = IBV_QPS_INIT,
- /* Primary port number. */
- .port_num = priv->port
- };
- ret = ibv_exp_modify_qp(tmpl.qp, &mod,
- (IBV_EXP_QP_STATE |
-#ifdef RSS_SUPPORT
- (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
-#endif /* RSS_SUPPORT */
- IBV_EXP_QP_PORT));
- if (ret) {
- ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- if ((parent) || (!priv->rss)) {
- /* Configure MAC and broadcast addresses. */
- ret = rxq_mac_addrs_add(&tmpl);
- if (ret) {
- ERROR("%p: QP flow attachment failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- }
- /* Allocate descriptors for RX queues, except for the RSS parent. */
- if (parent)
- goto skip_alloc;
- if (tmpl.sp)
- ret = rxq_alloc_elts_sp(&tmpl, desc, NULL);
- else
- ret = rxq_alloc_elts(&tmpl, desc, NULL);
- if (ret) {
- ERROR("%p: RXQ allocation failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- ret = ibv_post_recv(tmpl.qp,
- (tmpl.sp ?
- &(*tmpl.elts.sp)[0].wr :
- &(*tmpl.elts.no_sp)[0].wr),
- &bad_wr);
- if (ret) {
- ERROR("%p: ibv_post_recv() failed for WR %p: %s",
- (void *)dev,
- (void *)bad_wr,
- strerror(ret));
- goto error;
- }
-skip_alloc:
- mod = (struct ibv_exp_qp_attr){
- .qp_state = IBV_QPS_RTR
- };
- ret = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
- if (ret) {
- ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
- (void *)dev, strerror(ret));
- goto error;
- }
- /* Save port ID. */
- tmpl.port_id = dev->data->port_id;
- DEBUG("%p: RTE port ID: %u", (void *)rxq, tmpl.port_id);
- /* Clean up rxq in case we're reinitializing it. */
- DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq);
- rxq_cleanup(rxq);
- *rxq = tmpl;
- DEBUG("%p: rxq updated with %p", (void *)rxq, (void *)&tmpl);
- assert(ret == 0);
- return 0;
-error:
- rxq_cleanup(&tmpl);
- assert(ret > 0);
- return ret;
-}
-
-/**
- * DPDK callback to configure a RX queue.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param idx
- * RX queue index.
- * @param desc
- * Number of descriptors to configure in queue.
- * @param socket
- * NUMA socket on which memory must be allocated.
- * @param[in] conf
- * Thresholds parameters.
- * @param mp
- * Memory pool for buffer allocations.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
- unsigned int socket, const struct rte_eth_rxconf *conf,
- struct rte_mempool *mp)
-{
- struct priv *priv = dev->data->dev_private;
- struct rxq *rxq = (*priv->rxqs)[idx];
- int ret;
-
- priv_lock(priv);
- DEBUG("%p: configuring queue %u for %u descriptors",
- (void *)dev, idx, desc);
- if (idx >= priv->rxqs_n) {
- ERROR("%p: queue index out of range (%u >= %u)",
- (void *)dev, idx, priv->rxqs_n);
- priv_unlock(priv);
- return -EOVERFLOW;
- }
- if (rxq != NULL) {
- DEBUG("%p: reusing already allocated queue index %u (%p)",
- (void *)dev, idx, (void *)rxq);
- if (priv->started) {
- priv_unlock(priv);
- return -EEXIST;
- }
- (*priv->rxqs)[idx] = NULL;
- rxq_cleanup(rxq);
- } else {
- rxq = rte_calloc_socket("RXQ", 1, sizeof(*rxq), 0, socket);
- if (rxq == NULL) {
- ERROR("%p: unable to allocate queue index %u",
- (void *)dev, idx);
- priv_unlock(priv);
- return -ENOMEM;
- }
- }
- ret = rxq_setup(dev, rxq, desc, socket, conf, mp);
- if (ret)
- rte_free(rxq);
- else {
- rxq->stats.idx = idx;
- DEBUG("%p: adding RX queue %p to list",
- (void *)dev, (void *)rxq);
- (*priv->rxqs)[idx] = rxq;
- /* Update receive callback. */
- if (rxq->sp)
- dev->rx_pkt_burst = mlx4_rx_burst_sp;
- else
- dev->rx_pkt_burst = mlx4_rx_burst;
- }
- priv_unlock(priv);
- return -ret;
-}
-
-/**
- * DPDK callback to release a RX queue.
- *
- * @param dpdk_rxq
- * Generic RX queue pointer.
- */
-static void
-mlx4_rx_queue_release(void *dpdk_rxq)
-{
- struct rxq *rxq = (struct rxq *)dpdk_rxq;
- struct priv *priv;
- unsigned int i;
-
- if (rxq == NULL)
- return;
- priv = rxq->priv;
- priv_lock(priv);
- assert(rxq != &priv->rxq_parent);
- for (i = 0; (i != priv->rxqs_n); ++i)
- if ((*priv->rxqs)[i] == rxq) {
- DEBUG("%p: removing RX queue %p from list",
- (void *)priv->dev, (void *)rxq);
- (*priv->rxqs)[i] = NULL;
- break;
- }
- rxq_cleanup(rxq);
- rte_free(rxq);
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to start the device.
- *
- * Simulate device start by attaching all configured flows.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_dev_start(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i = 0;
- unsigned int r;
- struct rxq *rxq;
-
- priv_lock(priv);
- if (priv->started) {
- priv_unlock(priv);
- return 0;
- }
- DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
- priv->started = 1;
- if (priv->rss) {
- rxq = &priv->rxq_parent;
- r = 1;
- } else {
- rxq = (*priv->rxqs)[0];
- r = priv->rxqs_n;
- }
- /* Iterate only once when RSS is enabled. */
- do {
- int ret;
-
- /* Ignore nonexistent RX queues. */
- if (rxq == NULL)
- continue;
- ret = rxq_mac_addrs_add(rxq);
- if (!ret && priv->promisc)
- ret = rxq_promiscuous_enable(rxq);
- if (!ret && priv->allmulti)
- ret = rxq_allmulticast_enable(rxq);
- if (!ret)
- continue;
- WARN("%p: QP flow attachment failed: %s",
- (void *)dev, strerror(ret));
- /* Rollback. */
- while (i != 0) {
- rxq = (*priv->rxqs)[--i];
- if (rxq != NULL) {
- rxq_allmulticast_disable(rxq);
- rxq_promiscuous_disable(rxq);
- rxq_mac_addrs_del(rxq);
- }
- }
- priv->started = 0;
- return -ret;
- } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
- priv_unlock(priv);
- return 0;
-}
-
-/**
- * DPDK callback to stop the device.
- *
- * Simulate device stop by detaching all configured flows.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- */
-static void
-mlx4_dev_stop(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i = 0;
- unsigned int r;
- struct rxq *rxq;
-
- priv_lock(priv);
- if (!priv->started) {
- priv_unlock(priv);
- return;
- }
- DEBUG("%p: detaching flows from all RX queues", (void *)dev);
- priv->started = 0;
- if (priv->rss) {
- rxq = &priv->rxq_parent;
- r = 1;
- } else {
- rxq = (*priv->rxqs)[0];
- r = priv->rxqs_n;
- }
- /* Iterate only once when RSS is enabled. */
- do {
- /* Ignore nonexistent RX queues. */
- if (rxq == NULL)
- continue;
- rxq_allmulticast_disable(rxq);
- rxq_promiscuous_disable(rxq);
- rxq_mac_addrs_del(rxq);
- } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
- priv_unlock(priv);
-}
-
-/**
- * Dummy DPDK callback for TX.
- *
- * This function is used to temporarily replace the real callback during
- * unsafe control operations on the queue, or in case of error.
- *
- * @param dpdk_txq
- * Generic pointer to TX queue structure.
- * @param[in] pkts
- * Packets to transmit.
- * @param pkts_n
- * Number of packets in array.
- *
- * @return
- * Number of packets successfully transmitted (<= pkts_n).
- */
-static uint16_t
-removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
-{
- (void)dpdk_txq;
- (void)pkts;
- (void)pkts_n;
- return 0;
-}
-
-/**
- * Dummy DPDK callback for RX.
- *
- * This function is used to temporarily replace the real callback during
- * unsafe control operations on the queue, or in case of error.
- *
- * @param dpdk_rxq
- * Generic pointer to RX queue structure.
- * @param[out] pkts
- * Array to store received packets.
- * @param pkts_n
- * Maximum number of packets in array.
- *
- * @return
- * Number of packets successfully received (<= pkts_n).
- */
-static uint16_t
-removed_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
-{
- (void)dpdk_rxq;
- (void)pkts;
- (void)pkts_n;
- return 0;
-}
-
-/**
- * DPDK callback to close the device.
- *
- * Destroy all queues and objects, free memory.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- */
-static void
-mlx4_dev_close(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- void *tmp;
- unsigned int i;
-
- priv_lock(priv);
- DEBUG("%p: closing device \"%s\"",
- (void *)dev,
- ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
- /* Prevent crashes when queues are still in use. This is unfortunately
- * still required for DPDK 1.3 because some programs (such as testpmd)
- * never release them before closing the device. */
- dev->rx_pkt_burst = removed_rx_burst;
- dev->tx_pkt_burst = removed_tx_burst;
- if (priv->rxqs != NULL) {
- /* XXX race condition if mlx4_rx_burst() is still running. */
- usleep(1000);
- for (i = 0; (i != priv->rxqs_n); ++i) {
- tmp = (*priv->rxqs)[i];
- if (tmp == NULL)
- continue;
- (*priv->rxqs)[i] = NULL;
- rxq_cleanup(tmp);
- rte_free(tmp);
- }
- priv->rxqs_n = 0;
- priv->rxqs = NULL;
- }
- if (priv->txqs != NULL) {
- /* XXX race condition if mlx4_tx_burst() is still running. */
- usleep(1000);
- for (i = 0; (i != priv->txqs_n); ++i) {
- tmp = (*priv->txqs)[i];
- if (tmp == NULL)
- continue;
- (*priv->txqs)[i] = NULL;
- txq_cleanup(tmp);
- rte_free(tmp);
- }
- priv->txqs_n = 0;
- priv->txqs = NULL;
- }
- if (priv->rss)
- rxq_cleanup(&priv->rxq_parent);
- if (priv->pd != NULL) {
- assert(priv->ctx != NULL);
- claim_zero(ibv_dealloc_pd(priv->pd));
- claim_zero(ibv_close_device(priv->ctx));
- } else
- assert(priv->ctx == NULL);
- priv_unlock(priv);
- memset(priv, 0, sizeof(*priv));
-}
-
-/**
- * DPDK callback to get information about the device.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param[out] info
- * Info structure output buffer.
- */
-static void
-mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int max;
-
- priv_lock(priv);
- /* FIXME: we should ask the device for these values. */
- info->min_rx_bufsize = 32;
- info->max_rx_pktlen = 65536;
- /*
- * Since we need one CQ per QP, the limit is the minimum number
- * between the two values.
- */
- max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
- priv->device_attr.max_qp : priv->device_attr.max_cq);
- /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
- if (max >= 65535)
- max = 65535;
- info->max_rx_queues = max;
- info->max_tx_queues = max;
- info->max_mac_addrs = elemof(priv->mac);
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to get device statistics.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param[out] stats
- * Stats structure output buffer.
- */
-static void
-mlx4_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
-{
- struct priv *priv = dev->data->dev_private;
- struct rte_eth_stats tmp = {0};
- unsigned int i;
- unsigned int idx;
-
- priv_lock(priv);
- /* Add software counters. */
- for (i = 0; (i != priv->rxqs_n); ++i) {
- struct rxq *rxq = (*priv->rxqs)[i];
-
- if (rxq == NULL)
- continue;
- idx = rxq->stats.idx;
- if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
-#ifdef MLX4_PMD_SOFT_COUNTERS
- tmp.q_ipackets[idx] += rxq->stats.ipackets;
- tmp.q_ibytes[idx] += rxq->stats.ibytes;
-#endif
- tmp.q_errors[idx] += (rxq->stats.idropped +
- rxq->stats.rx_nombuf);
- }
-#ifdef MLX4_PMD_SOFT_COUNTERS
- tmp.ipackets += rxq->stats.ipackets;
- tmp.ibytes += rxq->stats.ibytes;
-#endif
- tmp.ierrors += rxq->stats.idropped;
- tmp.rx_nombuf += rxq->stats.rx_nombuf;
- }
- for (i = 0; (i != priv->txqs_n); ++i) {
- struct txq *txq = (*priv->txqs)[i];
-
- if (txq == NULL)
- continue;
- idx = txq->stats.idx;
- if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
-#ifdef MLX4_PMD_SOFT_COUNTERS
- tmp.q_opackets[idx] += txq->stats.opackets;
- tmp.q_obytes[idx] += txq->stats.obytes;
-#endif
- tmp.q_errors[idx] += txq->stats.odropped;
- }
-#ifdef MLX4_PMD_SOFT_COUNTERS
- tmp.opackets += txq->stats.opackets;
- tmp.obytes += txq->stats.obytes;
-#endif
- tmp.oerrors += txq->stats.odropped;
- }
-#ifndef MLX4_PMD_SOFT_COUNTERS
- /* FIXME: retrieve and add hardware counters. */
-#endif
- *stats = tmp;
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to clear device statistics.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- */
-static void
-mlx4_stats_reset(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i;
- unsigned int idx;
-
- priv_lock(priv);
- for (i = 0; (i != priv->rxqs_n); ++i) {
- if ((*priv->rxqs)[i] == NULL)
- continue;
- idx = (*priv->rxqs)[i]->stats.idx;
- (*priv->rxqs)[i]->stats =
- (struct mlx4_rxq_stats){ .idx = idx };
- }
- for (i = 0; (i != priv->txqs_n); ++i) {
- if ((*priv->txqs)[i] == NULL)
- continue;
- idx = (*priv->rxqs)[i]->stats.idx;
- (*priv->txqs)[i]->stats =
- (struct mlx4_txq_stats){ .idx = idx };
- }
-#ifndef MLX4_PMD_SOFT_COUNTERS
- /* FIXME: reset hardware counters. */
-#endif
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to remove a MAC address.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param index
- * MAC address index.
- */
-static void
-mlx4_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
-{
- struct priv *priv = dev->data->dev_private;
-
- priv_lock(priv);
- DEBUG("%p: removing MAC address from index %" PRIu32,
- (void *)dev, index);
- if (index >= MLX4_MAX_MAC_ADDRESSES)
- goto end;
- /* Refuse to remove the broadcast address, this one is special. */
- if (!memcmp(priv->mac[index].addr_bytes, "\xff\xff\xff\xff\xff\xff",
- ETHER_ADDR_LEN))
- goto end;
- priv_mac_addr_del(priv, index);
-end:
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to add a MAC address.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param mac_addr
- * MAC address to register.
- * @param index
- * MAC address index.
- * @param vmdq
- * VMDq pool index to associate address with (ignored).
- */
-static void
-mlx4_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
- uint32_t index, uint32_t vmdq)
-{
- struct priv *priv = dev->data->dev_private;
-
- (void)vmdq;
- priv_lock(priv);
- DEBUG("%p: adding MAC address at index %" PRIu32,
- (void *)dev, index);
- if (index >= MLX4_MAX_MAC_ADDRESSES)
- goto end;
- /* Refuse to add the broadcast address, this one is special. */
- if (!memcmp(mac_addr->addr_bytes, "\xff\xff\xff\xff\xff\xff",
- ETHER_ADDR_LEN))
- goto end;
- priv_mac_addr_add(priv, index,
- (const uint8_t (*)[ETHER_ADDR_LEN])
- mac_addr->addr_bytes);
-end:
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to enable promiscuous mode.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- */
-static void
-mlx4_promiscuous_enable(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i;
- int ret;
-
- priv_lock(priv);
- if (priv->promisc) {
- priv_unlock(priv);
- return;
- }
- /* If device isn't started, this is all we need to do. */
- if (!priv->started)
- goto end;
- if (priv->rss) {
- ret = rxq_promiscuous_enable(&priv->rxq_parent);
- if (ret) {
- priv_unlock(priv);
- return;
- }
- goto end;
- }
- for (i = 0; (i != priv->rxqs_n); ++i) {
- if ((*priv->rxqs)[i] == NULL)
- continue;
- ret = rxq_promiscuous_enable((*priv->rxqs)[i]);
- if (!ret)
- continue;
- /* Failure, rollback. */
- while (i != 0)
- if ((*priv->rxqs)[--i] != NULL)
- rxq_promiscuous_disable((*priv->rxqs)[i]);
- priv_unlock(priv);
- return;
- }
-end:
- priv->promisc = 1;
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to disable promiscuous mode.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- */
-static void
-mlx4_promiscuous_disable(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i;
-
- priv_lock(priv);
- if (!priv->promisc) {
- priv_unlock(priv);
- return;
- }
- if (priv->rss) {
- rxq_promiscuous_disable(&priv->rxq_parent);
- goto end;
- }
- for (i = 0; (i != priv->rxqs_n); ++i)
- if ((*priv->rxqs)[i] != NULL)
- rxq_promiscuous_disable((*priv->rxqs)[i]);
-end:
- priv->promisc = 0;
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to enable allmulti mode.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- */
-static void
-mlx4_allmulticast_enable(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i;
- int ret;
-
- priv_lock(priv);
- if (priv->allmulti) {
- priv_unlock(priv);
- return;
- }
- /* If device isn't started, this is all we need to do. */
- if (!priv->started)
- goto end;
- if (priv->rss) {
- ret = rxq_allmulticast_enable(&priv->rxq_parent);
- if (ret) {
- priv_unlock(priv);
- return;
- }
- goto end;
- }
- for (i = 0; (i != priv->rxqs_n); ++i) {
- if ((*priv->rxqs)[i] == NULL)
- continue;
- ret = rxq_allmulticast_enable((*priv->rxqs)[i]);
- if (!ret)
- continue;
- /* Failure, rollback. */
- while (i != 0)
- if ((*priv->rxqs)[--i] != NULL)
- rxq_allmulticast_disable((*priv->rxqs)[i]);
- priv_unlock(priv);
- return;
- }
-end:
- priv->allmulti = 1;
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to disable allmulti mode.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- */
-static void
-mlx4_allmulticast_disable(struct rte_eth_dev *dev)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i;
-
- priv_lock(priv);
- if (!priv->allmulti) {
- priv_unlock(priv);
- return;
- }
- if (priv->rss) {
- rxq_allmulticast_disable(&priv->rxq_parent);
- goto end;
- }
- for (i = 0; (i != priv->rxqs_n); ++i)
- if ((*priv->rxqs)[i] != NULL)
- rxq_allmulticast_disable((*priv->rxqs)[i]);
-end:
- priv->allmulti = 0;
- priv_unlock(priv);
-}
-
-/**
- * DPDK callback to retrieve physical link information (unlocked version).
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param wait_to_complete
- * Wait for request completion (ignored).
- */
-static int
-mlx4_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
-{
- struct priv *priv = dev->data->dev_private;
- struct ibv_port_attr port_attr;
- static const uint8_t width_mult[] = {
- /* Multiplier values taken from devinfo.c in libibverbs. */
- 0, 1, 4, 0, 8, 0, 0, 0, 12, 0
- };
-
- (void)wait_to_complete;
- errno = ibv_query_port(priv->ctx, priv->port, &port_attr);
- if (errno) {
- WARN("port query failed: %s", strerror(errno));
- return -1;
- }
- dev->data->dev_link = (struct rte_eth_link){
- .link_speed = (ibv_rate_to_mbps(mult_to_ibv_rate
- (port_attr.active_speed)) *
- width_mult[(port_attr.active_width %
- sizeof(width_mult))]),
- .link_duplex = ETH_LINK_FULL_DUPLEX,
- .link_status = (port_attr.state == IBV_PORT_ACTIVE)
- };
- if (memcmp(&port_attr, &priv->port_attr, sizeof(port_attr))) {
- /* Link status changed. */
- priv->port_attr = port_attr;
- return 0;
- }
- /* Link status is still the same. */
- return -1;
-}
-
-/**
- * DPDK callback to retrieve physical link information.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param wait_to_complete
- * Wait for request completion (ignored).
- */
-static int
-mlx4_link_update(struct rte_eth_dev *dev, int wait_to_complete)
-{
- struct priv *priv = dev->data->dev_private;
- int ret;
-
- priv_lock(priv);
- ret = mlx4_link_update_unlocked(dev, wait_to_complete);
- priv_unlock(priv);
- return ret;
-}
-
-/**
- * DPDK callback to change the MTU.
- *
- * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be
- * received). Use this as a hint to enable/disable scattered packets support
- * and improve performance when not needed.
- * Since failure is not an option, reconfiguring queues on the fly is not
- * recommended.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param in_mtu
- * New MTU.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
-{
- struct priv *priv = dev->data->dev_private;
- int ret = 0;
- unsigned int i;
- uint16_t (*rx_func)(void *, struct rte_mbuf **, uint16_t) =
- mlx4_rx_burst;
-
- priv_lock(priv);
- /* Set kernel interface MTU first. */
- if (priv_set_mtu(priv, mtu)) {
- ret = errno;
- WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
- strerror(ret));
- goto out;
- } else
- DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
- priv->mtu = mtu;
- /* Temporarily replace RX handler with a fake one, assuming it has not
- * been copied elsewhere. */
- dev->rx_pkt_burst = removed_rx_burst;
- /* Make sure everyone has left mlx4_rx_burst() and uses
- * removed_rx_burst() instead. */
- rte_wmb();
- usleep(1000);
- /* Reconfigure each RX queue. */
- for (i = 0; (i != priv->rxqs_n); ++i) {
- struct rxq *rxq = (*priv->rxqs)[i];
- unsigned int max_frame_len;
- int sp;
-
- if (rxq == NULL)
- continue;
- /* Calculate new maximum frame length according to MTU and
- * toggle scattered support (sp) if necessary. */
- max_frame_len = (priv->mtu + ETHER_HDR_LEN +
- (ETHER_MAX_VLAN_FRAME_LEN - ETHER_MAX_LEN));
- sp = (max_frame_len > (rxq->mb_len - RTE_PKTMBUF_HEADROOM));
- /* Provide new values to rxq_setup(). */
- dev->data->dev_conf.rxmode.jumbo_frame = sp;
- dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame_len;
- ret = rxq_rehash(dev, rxq);
- if (ret) {
- /* Force SP RX if that queue requires it and abort. */
- if (rxq->sp)
- rx_func = mlx4_rx_burst_sp;
- break;
- }
- /* Reenable non-RSS queue attributes. No need to check
- * for errors at this stage. */
- if (!priv->rss) {
- rxq_mac_addrs_add(rxq);
- if (priv->promisc)
- rxq_promiscuous_enable(rxq);
- if (priv->allmulti)
- rxq_allmulticast_enable(rxq);
- }
- /* Scattered burst function takes priority. */
- if (rxq->sp)
- rx_func = mlx4_rx_burst_sp;
- }
- /* Burst functions can now be called again. */
- rte_wmb();
- dev->rx_pkt_burst = rx_func;
-out:
- priv_unlock(priv);
- assert(ret >= 0);
- return -ret;
-}
-
-/**
- * DPDK callback to get flow control status.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param[out] fc_conf
- * Flow control output buffer.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
-{
- struct priv *priv = dev->data->dev_private;
- struct ifreq ifr;
- struct ethtool_pauseparam ethpause = {
- .cmd = ETHTOOL_GPAUSEPARAM
- };
- int ret;
-
- ifr.ifr_data = ðpause;
- priv_lock(priv);
- if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
- ret = errno;
- WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
- " failed: %s",
- strerror(ret));
- goto out;
- }
-
- fc_conf->autoneg = ethpause.autoneg;
- if (ethpause.rx_pause && ethpause.tx_pause)
- fc_conf->mode = RTE_FC_FULL;
- else if (ethpause.rx_pause)
- fc_conf->mode = RTE_FC_RX_PAUSE;
- else if (ethpause.tx_pause)
- fc_conf->mode = RTE_FC_TX_PAUSE;
- else
- fc_conf->mode = RTE_FC_NONE;
- ret = 0;
-
-out:
- priv_unlock(priv);
- assert(ret >= 0);
- return -ret;
-}
-
-/**
- * DPDK callback to modify flow control parameters.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param[in] fc_conf
- * Flow control parameters.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
-{
- struct priv *priv = dev->data->dev_private;
- struct ifreq ifr;
- struct ethtool_pauseparam ethpause = {
- .cmd = ETHTOOL_SPAUSEPARAM
- };
- int ret;
-
- ifr.ifr_data = ðpause;
- ethpause.autoneg = fc_conf->autoneg;
- if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
- (fc_conf->mode & RTE_FC_RX_PAUSE))
- ethpause.rx_pause = 1;
- else
- ethpause.rx_pause = 0;
-
- if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
- (fc_conf->mode & RTE_FC_TX_PAUSE))
- ethpause.tx_pause = 1;
- else
- ethpause.tx_pause = 0;
-
- priv_lock(priv);
- if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
- ret = errno;
- WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
- " failed: %s",
- strerror(ret));
- goto out;
- }
- ret = 0;
-
-out:
- priv_unlock(priv);
- assert(ret >= 0);
- return -ret;
-}
-
-/**
- * Configure a VLAN filter.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param vlan_id
- * VLAN ID to filter.
- * @param on
- * Toggle filter.
- *
- * @return
- * 0 on success, errno value on failure.
- */
-static int
-vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
-{
- struct priv *priv = dev->data->dev_private;
- unsigned int i;
- unsigned int j = -1;
-
- DEBUG("%p: %s VLAN filter ID %" PRIu16,
- (void *)dev, (on ? "enable" : "disable"), vlan_id);
- for (i = 0; (i != elemof(priv->vlan_filter)); ++i) {
- if (!priv->vlan_filter[i].enabled) {
- /* Unused index, remember it. */
- j = i;
- continue;
- }
- if (priv->vlan_filter[i].id != vlan_id)
- continue;
- /* This VLAN ID is already known, use its index. */
- j = i;
- break;
- }
- /* Check if there's room for another VLAN filter. */
- if (j == (unsigned int)-1)
- return ENOMEM;
- /*
- * VLAN filters apply to all configured MAC addresses, flow
- * specifications must be reconfigured accordingly.
- */
- priv->vlan_filter[j].id = vlan_id;
- if ((on) && (!priv->vlan_filter[j].enabled)) {
- /*
- * Filter is disabled, enable it.
- * Rehashing flows in all RX queues is necessary.
- */
- if (priv->rss)
- rxq_mac_addrs_del(&priv->rxq_parent);
- else
- for (i = 0; (i != priv->rxqs_n); ++i)
- if ((*priv->rxqs)[i] != NULL)
- rxq_mac_addrs_del((*priv->rxqs)[i]);
- priv->vlan_filter[j].enabled = 1;
- if (priv->started) {
- if (priv->rss)
- rxq_mac_addrs_add(&priv->rxq_parent);
- else
- for (i = 0; (i != priv->rxqs_n); ++i) {
- if ((*priv->rxqs)[i] == NULL)
- continue;
- rxq_mac_addrs_add((*priv->rxqs)[i]);
- }
- }
- } else if ((!on) && (priv->vlan_filter[j].enabled)) {
- /*
- * Filter is enabled, disable it.
- * Rehashing flows in all RX queues is necessary.
- */
- if (priv->rss)
- rxq_mac_addrs_del(&priv->rxq_parent);
- else
- for (i = 0; (i != priv->rxqs_n); ++i)
- if ((*priv->rxqs)[i] != NULL)
- rxq_mac_addrs_del((*priv->rxqs)[i]);
- priv->vlan_filter[j].enabled = 0;
- if (priv->started) {
- if (priv->rss)
- rxq_mac_addrs_add(&priv->rxq_parent);
- else
- for (i = 0; (i != priv->rxqs_n); ++i) {
- if ((*priv->rxqs)[i] == NULL)
- continue;
- rxq_mac_addrs_add((*priv->rxqs)[i]);
- }
- }
- }
- return 0;
-}
-
-/**
- * DPDK callback to configure a VLAN filter.
- *
- * @param dev
- * Pointer to Ethernet device structure.
- * @param vlan_id
- * VLAN ID to filter.
- * @param on
- * Toggle filter.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
-{
- struct priv *priv = dev->data->dev_private;
- int ret;
-
- priv_lock(priv);
- ret = vlan_filter_set(dev, vlan_id, on);
- priv_unlock(priv);
- assert(ret >= 0);
- return -ret;
-}
-
-static const struct eth_dev_ops mlx4_dev_ops = {
- .dev_configure = mlx4_dev_configure,
- .dev_start = mlx4_dev_start,
- .dev_stop = mlx4_dev_stop,
- .dev_close = mlx4_dev_close,
- .promiscuous_enable = mlx4_promiscuous_enable,
- .promiscuous_disable = mlx4_promiscuous_disable,
- .allmulticast_enable = mlx4_allmulticast_enable,
- .allmulticast_disable = mlx4_allmulticast_disable,
- .link_update = mlx4_link_update,
- .stats_get = mlx4_stats_get,
- .stats_reset = mlx4_stats_reset,
- .queue_stats_mapping_set = NULL,
- .dev_infos_get = mlx4_dev_infos_get,
- .vlan_filter_set = mlx4_vlan_filter_set,
- .vlan_tpid_set = NULL,
- .vlan_strip_queue_set = NULL,
- .vlan_offload_set = NULL,
- .rx_queue_setup = mlx4_rx_queue_setup,
- .tx_queue_setup = mlx4_tx_queue_setup,
- .rx_queue_release = mlx4_rx_queue_release,
- .tx_queue_release = mlx4_tx_queue_release,
- .dev_led_on = NULL,
- .dev_led_off = NULL,
- .flow_ctrl_get = mlx4_dev_get_flow_ctrl,
- .flow_ctrl_set = mlx4_dev_set_flow_ctrl,
- .priority_flow_ctrl_set = NULL,
- .mac_addr_remove = mlx4_mac_addr_remove,
- .mac_addr_add = mlx4_mac_addr_add,
- .mtu_set = mlx4_dev_set_mtu,
- .fdir_add_signature_filter = NULL,
- .fdir_update_signature_filter = NULL,
- .fdir_remove_signature_filter = NULL,
- .fdir_add_perfect_filter = NULL,
- .fdir_update_perfect_filter = NULL,
- .fdir_remove_perfect_filter = NULL,
- .fdir_set_masks = NULL
-};
-
-/**
- * Get PCI information from struct ibv_device.
- *
- * @param device
- * Pointer to Ethernet device structure.
- * @param[out] pci_addr
- * PCI bus address output buffer.
- *
- * @return
- * 0 on success, -1 on failure and errno is set.
- */
-static int
-mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
- struct rte_pci_addr *pci_addr)
-{
- FILE *file;
- char line[32];
- MKSTR(path, "%s/device/uevent", device->ibdev_path);
-
- file = fopen(path, "rb");
- if (file == NULL)
- return -1;
- while (fgets(line, sizeof(line), file) == line) {
- size_t len = strlen(line);
- int ret;
-
- /* Truncate long lines. */
- if (len == (sizeof(line) - 1))
- while (line[(len - 1)] != '\n') {
- ret = fgetc(file);
- if (ret == EOF)
- break;
- line[(len - 1)] = ret;
- }
- /* Extract information. */
- if (sscanf(line,
- "PCI_SLOT_NAME="
- "%" SCNx16 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
- &pci_addr->domain,
- &pci_addr->bus,
- &pci_addr->devid,
- &pci_addr->function) == 4) {
- ret = 0;
- break;
- }
- }
- fclose(file);
- return 0;
-}
-
-/**
- * Derive MAC address from port GID.
- *
- * @param[out] mac
- * MAC address output buffer.
- * @param port
- * Physical port number.
- * @param[in] gid
- * Port GID.
- */
-static void
-mac_from_gid(uint8_t (*mac)[ETHER_ADDR_LEN], uint32_t port, uint8_t *gid)
-{
- memcpy(&(*mac)[0], gid + 8, 3);
- memcpy(&(*mac)[3], gid + 13, 3);
- if (port == 1)
- (*mac)[0] ^= 2;
-}
-
-/* Support up to 32 adapters. */
-static struct {
- struct rte_pci_addr pci_addr; /* associated PCI address */
- uint32_t ports; /* physical ports bitfield. */
-} mlx4_dev[32];
-
-/**
- * Get device index in mlx4_dev[] from PCI bus address.
- *
- * @param[in] pci_addr
- * PCI bus address to look for.
- *
- * @return
- * mlx4_dev[] index on success, -1 on failure.
- */
-static int
-mlx4_dev_idx(struct rte_pci_addr *pci_addr)
-{
- unsigned int i;
- int ret = -1;
-
- assert(pci_addr != NULL);
- for (i = 0; (i != elemof(mlx4_dev)); ++i) {
- if ((mlx4_dev[i].pci_addr.domain == pci_addr->domain) &&
- (mlx4_dev[i].pci_addr.bus == pci_addr->bus) &&
- (mlx4_dev[i].pci_addr.devid == pci_addr->devid) &&
- (mlx4_dev[i].pci_addr.function == pci_addr->function))
- return i;
- if ((mlx4_dev[i].ports == 0) && (ret == -1))
- ret = i;
- }
- return ret;
-}
-
-/**
- * Retrieve integer value from environment variable.
- *
- * @param[in] name
- * Environment variable name.
- *
- * @return
- * Integer value, 0 if the variable is not set.
- */
-static int
-mlx4_getenv_int(const char *name)
-{
- const char *val = getenv(name);
-
- if (val == NULL)
- return 0;
- return atoi(val);
-}
-
-static struct eth_driver mlx4_driver;
-
-/**
- * DPDK callback to register a PCI device.
- *
- * This function creates an Ethernet device for each port of a given
- * PCI device.
- *
- * @param[in] pci_drv
- * PCI driver structure (mlx4_driver).
- * @param[in] pci_dev
- * PCI device information.
- *
- * @return
- * 0 on success, negative errno value on failure.
- */
-static int
-mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
-{
- struct ibv_device **list;
- struct ibv_device *ibv_dev;
- int err = 0;
- struct ibv_context *attr_ctx = NULL;
- struct ibv_device_attr device_attr;
- unsigned int vf;
- int idx;
- int i;
-
- (void)pci_drv;
- assert(pci_drv == &mlx4_driver.pci_drv);
- /* Get mlx4_dev[] index. */
- idx = mlx4_dev_idx(&pci_dev->addr);
- if (idx == -1) {
- ERROR("this driver cannot support any more adapters");
- return -ENOMEM;
- }
- DEBUG("using driver device index %d", idx);
-
- /* Save PCI address. */
- mlx4_dev[idx].pci_addr = pci_dev->addr;
- list = ibv_get_device_list(&i);
- if (list == NULL) {
- assert(errno);
- if (errno == ENOSYS) {
- WARN("cannot list devices, is ib_uverbs loaded?");
- return 0;
- }
- return -errno;
- }
- assert(i >= 0);
- /*
- * For each listed device, check related sysfs entry against
- * the provided PCI ID.
- */
- while (i != 0) {
- struct rte_pci_addr pci_addr;
-
- --i;
- DEBUG("checking device \"%s\"", list[i]->name);
- if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
- continue;
- if ((pci_dev->addr.domain != pci_addr.domain) ||
- (pci_dev->addr.bus != pci_addr.bus) ||
- (pci_dev->addr.devid != pci_addr.devid) ||
- (pci_dev->addr.function != pci_addr.function))
- continue;
- vf = (pci_dev->id.device_id ==
- PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
- INFO("PCI information matches, using device \"%s\" (VF: %s)",
- list[i]->name, (vf ? "true" : "false"));
- attr_ctx = ibv_open_device(list[i]);
- err = errno;
- break;
- }
- if (attr_ctx == NULL) {
- ibv_free_device_list(list);
- switch (err) {
- case 0:
- WARN("cannot access device, is mlx4_ib loaded?");
- return 0;
- case EINVAL:
- WARN("cannot use device, are drivers up to date?");
- return 0;
- }
- assert(err > 0);
- return -err;
- }
- ibv_dev = list[i];
-
- DEBUG("device opened");
- if (ibv_query_device(attr_ctx, &device_attr))
- goto error;
- INFO("%u port(s) detected", device_attr.phys_port_cnt);
-
- for (i = 0; i < device_attr.phys_port_cnt; i++) {
- uint32_t port = i + 1; /* ports are indexed from one */
- uint32_t test = (1 << i);
- struct ibv_context *ctx = NULL;
- struct ibv_port_attr port_attr;
- struct ibv_pd *pd = NULL;
- struct priv *priv = NULL;
- struct rte_eth_dev *eth_dev;
-#if defined(INLINE_RECV) || defined(RSS_SUPPORT)
- struct ibv_exp_device_attr exp_device_attr;
-#endif
- struct ether_addr mac;
- union ibv_gid temp_gid;
-
-#ifdef RSS_SUPPORT
- exp_device_attr.comp_mask =
- (IBV_EXP_DEVICE_ATTR_EXP_CAP_FLAGS |
- IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ);
-#endif /* RSS_SUPPORT */
-
- DEBUG("using port %u (%08" PRIx32 ")", port, test);
-
- ctx = ibv_open_device(ibv_dev);
- if (ctx == NULL)
- goto port_error;
-
- /* Check port status. */
- err = ibv_query_port(ctx, port, &port_attr);
- if (err) {
- ERROR("port query failed: %s", strerror(err));
- goto port_error;
- }
- if (port_attr.state != IBV_PORT_ACTIVE)
- WARN("bad state for port %d: \"%s\" (%d)",
- port, ibv_port_state_str(port_attr.state),
- port_attr.state);
-
- /* Allocate protection domain. */
- pd = ibv_alloc_pd(ctx);
- if (pd == NULL) {
- ERROR("PD allocation failure");
- err = ENOMEM;
- goto port_error;
- }
-
- mlx4_dev[idx].ports |= test;
-
- /* from rte_ethdev.c */
- priv = rte_zmalloc("ethdev private structure",
- sizeof(*priv),
- RTE_CACHE_LINE_SIZE);
- if (priv == NULL) {
- ERROR("priv allocation failure");
- err = ENOMEM;
- goto port_error;
- }
-
- priv->ctx = ctx;
- priv->device_attr = device_attr;
- priv->port_attr = port_attr;
- priv->port = port;
- priv->pd = pd;
- priv->mtu = ETHER_MTU;
-#ifdef RSS_SUPPORT
- if (ibv_exp_query_device(ctx, &exp_device_attr)) {
- INFO("experimental ibv_exp_query_device");
- goto port_error;
- }
- if ((exp_device_attr.exp_device_cap_flags &
- IBV_EXP_DEVICE_QPG) &&
- (exp_device_attr.exp_device_cap_flags &
- IBV_EXP_DEVICE_UD_RSS) &&
- (exp_device_attr.comp_mask &
- IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ) &&
- (exp_device_attr.max_rss_tbl_sz > 0)) {
- priv->hw_qpg = 1;
- priv->hw_rss = 1;
- priv->max_rss_tbl_sz = exp_device_attr.max_rss_tbl_sz;
- } else {
- priv->hw_qpg = 0;
- priv->hw_rss = 0;
- priv->max_rss_tbl_sz = 0;
- }
- priv->hw_tss = !!(exp_device_attr.exp_device_cap_flags &
- IBV_EXP_DEVICE_UD_TSS);
- DEBUG("device flags: %s%s%s",
- (priv->hw_qpg ? "IBV_DEVICE_QPG " : ""),
- (priv->hw_tss ? "IBV_DEVICE_TSS " : ""),
- (priv->hw_rss ? "IBV_DEVICE_RSS " : ""));
- if (priv->hw_rss)
- DEBUG("maximum RSS indirection table size: %u",
- exp_device_attr.max_rss_tbl_sz);
-#endif /* RSS_SUPPORT */
-
-#ifdef INLINE_RECV
- priv->inl_recv_size = mlx4_getenv_int("MLX4_INLINE_RECV_SIZE");
-
- if (priv->inl_recv_size) {
- exp_device_attr.comp_mask =
- IBV_EXP_DEVICE_ATTR_INLINE_RECV_SZ;
- if (ibv_exp_query_device(ctx, &exp_device_attr)) {
- INFO("Couldn't query device for inline-receive"
- " capabilities.");
- priv->inl_recv_size = 0;
- } else {
- if ((unsigned)exp_device_attr.inline_recv_sz <
- priv->inl_recv_size) {
- INFO("Max inline-receive (%d) <"
- " requested inline-receive (%u)",
- exp_device_attr.inline_recv_sz,
- priv->inl_recv_size);
- priv->inl_recv_size =
- exp_device_attr.inline_recv_sz;
- }
- }
- INFO("Set inline receive size to %u",
- priv->inl_recv_size);
- }
-#endif /* INLINE_RECV */
-
- (void)mlx4_getenv_int;
- priv->vf = vf;
- if (ibv_query_gid(ctx, port, 0, &temp_gid)) {
- ERROR("ibv_query_gid() failure");
- goto port_error;
- }
- /* Configure the first MAC address by default. */
- mac_from_gid(&mac.addr_bytes, port, temp_gid.raw);
- INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
- priv->port,
- mac.addr_bytes[0], mac.addr_bytes[1],
- mac.addr_bytes[2], mac.addr_bytes[3],
- mac.addr_bytes[4], mac.addr_bytes[5]);
- /* Register MAC and broadcast addresses. */
- claim_zero(priv_mac_addr_add(priv, 0,
- (const uint8_t (*)[ETHER_ADDR_LEN])
- mac.addr_bytes));
- claim_zero(priv_mac_addr_add(priv, 1,
- &(const uint8_t [ETHER_ADDR_LEN])
- { "\xff\xff\xff\xff\xff\xff" }));
-#ifndef NDEBUG
- {
- char ifname[IF_NAMESIZE];
-
- if (priv_get_ifname(priv, &ifname) == 0)
- DEBUG("port %u ifname is \"%s\"",
- priv->port, ifname);
- else
- DEBUG("port %u ifname is unknown", priv->port);
- }
-#endif
- /* Get actual MTU if possible. */
- priv_get_mtu(priv, &priv->mtu);
- DEBUG("port %u MTU is %u", priv->port, priv->mtu);
-
- /* from rte_ethdev.c */
- {
- char name[RTE_ETH_NAME_MAX_LEN];
-
- snprintf(name, sizeof(name), "%s port %u",
- ibv_get_device_name(ibv_dev), port);
- eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_PCI);
- }
- if (eth_dev == NULL) {
- ERROR("can not allocate rte ethdev");
- err = ENOMEM;
- goto port_error;
- }
-
- eth_dev->data->dev_private = priv;
- eth_dev->pci_dev = pci_dev;
- eth_dev->driver = &mlx4_driver;
- eth_dev->data->rx_mbuf_alloc_failed = 0;
- eth_dev->data->mtu = ETHER_MTU;
-
- priv->dev = eth_dev;
- eth_dev->dev_ops = &mlx4_dev_ops;
- eth_dev->data->mac_addrs = priv->mac;
-
- /* Bring Ethernet device up. */
- DEBUG("forcing Ethernet interface up");
- priv_set_flags(priv, ~IFF_UP, IFF_UP);
- continue;
-
-port_error:
- rte_free(priv);
- if (pd)
- claim_zero(ibv_dealloc_pd(pd));
- if (ctx)
- claim_zero(ibv_close_device(ctx));
- break;
- }
-
- /*
- * XXX if something went wrong in the loop above, there is a resource
- * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
- * long as the dpdk does not provide a way to deallocate a ethdev and a
- * way to enumerate the registered ethdevs to free the previous ones.
- */
-
- /* no port found, complain */
- if (!mlx4_dev[idx].ports) {
- err = ENODEV;
- goto error;
- }
-
-error:
- if (attr_ctx)
- claim_zero(ibv_close_device(attr_ctx));
- if (list)
- ibv_free_device_list(list);
- assert(err >= 0);
- return -err;
-}
-
-static const struct rte_pci_id mlx4_pci_id_map[] = {
- {
- .vendor_id = PCI_VENDOR_ID_MELLANOX,
- .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3,
- .subsystem_vendor_id = PCI_ANY_ID,
- .subsystem_device_id = PCI_ANY_ID
- },
- {
- .vendor_id = PCI_VENDOR_ID_MELLANOX,
- .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO,
- .subsystem_vendor_id = PCI_ANY_ID,
- .subsystem_device_id = PCI_ANY_ID
- },
- {
- .vendor_id = PCI_VENDOR_ID_MELLANOX,
- .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3VF,
- .subsystem_vendor_id = PCI_ANY_ID,
- .subsystem_device_id = PCI_ANY_ID
- },
- {
- .vendor_id = 0
- }
-};
-
-static struct eth_driver mlx4_driver = {
- .pci_drv = {
- .name = MLX4_DRIVER_NAME,
- .id_table = mlx4_pci_id_map,
- .devinit = mlx4_pci_devinit,
- },
- .dev_private_size = sizeof(struct priv)
-};
-
-/**
- * Driver initialization routine.
- */
-static int
-rte_mlx4_pmd_init(const char *name, const char *args)
-{
- (void)name;
- (void)args;
- rte_eal_pci_register(&mlx4_driver.pci_drv);
- return 0;
-}
-
-static struct rte_driver rte_mlx4_driver = {
- .type = PMD_PDEV,
- .name = MLX4_DRIVER_NAME,
- .init = rte_mlx4_pmd_init,
-};
-
-PMD_REGISTER_DRIVER(rte_mlx4_driver)
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright 2012-2015 6WIND S.A.
- * Copyright 2012 Mellanox.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of 6WIND S.A. nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef RTE_PMD_MLX4_H_
-#define RTE_PMD_MLX4_H_
-
-#include <stddef.h>
-#include <stdint.h>
-#include <limits.h>
-
-/*
- * Maximum number of simultaneous MAC addresses supported.
- *
- * According to ConnectX's Programmer Reference Manual:
- * The L2 Address Match is implemented by comparing a MAC/VLAN combination
- * of 128 MAC addresses and 127 VLAN values, comprising 128x127 possible
- * L2 addresses.
- */
-#define MLX4_MAX_MAC_ADDRESSES 128
-
-/* Maximum number of simultaneous VLAN filters supported. See above. */
-#define MLX4_MAX_VLAN_IDS 127
-
-/* Maximum number of Scatter/Gather Elements per Work Request. */
-#ifndef MLX4_PMD_SGE_WR_N
-#define MLX4_PMD_SGE_WR_N 4
-#endif
-
-/* Maximum size for inline data. */
-#ifndef MLX4_PMD_MAX_INLINE
-#define MLX4_PMD_MAX_INLINE 0
-#endif
-
-/*
- * Maximum number of cached Memory Pools (MPs) per TX queue. Each RTE MP
- * from which buffers are to be transmitted will have to be mapped by this
- * driver to their own Memory Region (MR). This is a slow operation.
- *
- * This value is always 1 for RX queues.
- */
-#ifndef MLX4_PMD_TX_MP_CACHE
-#define MLX4_PMD_TX_MP_CACHE 8
-#endif
-
-/*
- * If defined, only use software counters. The PMD will never ask the hardware
- * for these, and many of them won't be available.
- */
-#ifndef MLX4_PMD_SOFT_COUNTERS
-#define MLX4_PMD_SOFT_COUNTERS 1
-#endif
-
-enum {
- PCI_VENDOR_ID_MELLANOX = 0x15b3,
-};
-
-enum {
- PCI_DEVICE_ID_MELLANOX_CONNECTX3 = 0x1003,
- PCI_DEVICE_ID_MELLANOX_CONNECTX3VF = 0x1004,
- PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO = 0x1007,
-};
-
-#define MLX4_DRIVER_NAME "librte_pmd_mlx4"
-
-/* Bit-field manipulation. */
-#define BITFIELD_DECLARE(bf, type, size) \
- type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \
- !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
-#define BITFIELD_DEFINE(bf, type, size) \
- BITFIELD_DECLARE((bf), type, (size)) = { 0 }
-#define BITFIELD_SET(bf, b) \
- (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
- (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
- ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
-#define BITFIELD_RESET(bf, b) \
- (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
- (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
- ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
-#define BITFIELD_ISSET(bf, b) \
- (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
- !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
- ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
-
-/* Number of elements in array. */
-#define elemof(a) (sizeof(a) / sizeof((a)[0]))
-
-/* Cast pointer p to structure member m to its parent structure of type t. */
-#define containerof(p, t, m) ((t *)((uint8_t *)(p) - offsetof(t, m)))
-
-/* Branch prediction helpers. */
-#ifndef likely
-#define likely(c) __builtin_expect(!!(c), 1)
-#endif
-#ifndef unlikely
-#define unlikely(c) __builtin_expect(!!(c), 0)
-#endif
-
-/* Debugging */
-#ifndef NDEBUG
-#include <stdio.h>
-#define DEBUG__(m, ...) \
- (fprintf(stderr, "%s:%d: %s(): " m "%c", \
- __FILE__, __LINE__, __func__, __VA_ARGS__), \
- fflush(stderr), \
- (void)0)
-/*
- * Save/restore errno around DEBUG__().
- * XXX somewhat undefined behavior, but works.
- */
-#define DEBUG_(...) \
- (errno = ((int []){ \
- *(volatile int *)&errno, \
- (DEBUG__(__VA_ARGS__), 0) \
- })[0])
-#define DEBUG(...) DEBUG_(__VA_ARGS__, '\n')
-#define claim_zero(...) assert((__VA_ARGS__) == 0)
-#define claim_nonzero(...) assert((__VA_ARGS__) != 0)
-#define claim_positive(...) assert((__VA_ARGS__) >= 0)
-#else /* NDEBUG */
-/* No-ops. */
-#define DEBUG(...) (void)0
-#define claim_zero(...) (__VA_ARGS__)
-#define claim_nonzero(...) (__VA_ARGS__)
-#define claim_positive(...) (__VA_ARGS__)
-#endif /* NDEBUG */
-
-#endif /* RTE_PMD_MLX4_H_ */
+++ /dev/null
-DPDK_2.0 {
-
- local: *;
-};
git.droids-corp.org / dpdk.git / commitdiff