X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fmlx4%2Fmlx4.c;h=b20ceccee90104c13d5157724164b0d0f6c28416;hb=72b934adce8f5f9ed035c04ebed8b386243e5a2e;hp=8be1574b03324a350ebdc9aa234f1a93197f2fc1;hpb=decb8794084b8e1f7277483cf3ce812a40cae5c4;p=dpdk.git diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c index 8be1574b03..070cf71115 100644 --- a/drivers/net/mlx4/mlx4.c +++ b/drivers/net/mlx4/mlx4.c @@ -1,4214 +1,256 @@ -/*- - * 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. +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2012 6WIND S.A. + * Copyright 2012 Mellanox Technologies, Ltd */ -/* - * 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. +/** + * @file + * mlx4 driver initialization. */ -/* System headers. */ +#include +#include +#include +#include #include +#include #include #include -#include -#include #include -#include #include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -/* Verbs header. */ -/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */ +/* Verbs headers do not support -pedantic. */ #ifdef PEDANTIC -#pragma GCC diagnostic ignored "-pedantic" +#pragma GCC diagnostic ignored "-Wpedantic" #endif #include #ifdef PEDANTIC -#pragma GCC diagnostic error "-pedantic" +#pragma GCC diagnostic error "-Wpedantic" #endif -/* DPDK headers don't like -pedantic. */ -#ifdef PEDANTIC -#pragma GCC diagnostic ignored "-pedantic" -#endif +#include #include -#include -#include #include -#include #include -#include -#include -#include -#include -#include -#include -#include -#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. */ - unsigned int elts_head; /* Current index in (*elts)[]. */ - 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]) -{ - DIR *dir; - struct dirent *dent; - unsigned int dev_type = 0; - unsigned int dev_port_prev = ~0u; - char match[IF_NAMESIZE] = ""; - - { - 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_port; - int r; - - if ((name[0] == '.') && - ((name[1] == '\0') || - ((name[1] == '.') && (name[2] == '\0')))) - continue; - - MKSTR(path, "%s/device/net/%s/%s", - priv->ctx->device->ibdev_path, name, - (dev_type ? "dev_id" : "dev_port")); - - file = fopen(path, "rb"); - if (file == NULL) { - if (errno != ENOENT) - continue; - /* - * Switch to dev_id when dev_port does not exist as - * is the case with Linux kernel versions < 3.15. - */ -try_dev_id: - match[0] = '\0'; - if (dev_type) - break; - dev_type = 1; - dev_port_prev = ~0u; - rewinddir(dir); - continue; - } - r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port); - fclose(file); - if (r != 1) - continue; - /* - * Switch to dev_id when dev_port returns the same value for - * all ports. May happen when using a MOFED release older than - * 3.0 with a Linux kernel >= 3.15. - */ - if (dev_port == dev_port_prev) - goto try_dev_id; - dev_port_prev = dev_port; - if (dev_port == (priv->port - 1u)) - snprintf(match, sizeof(match), "%s", name); - } - closedir(dir); - if (match[0] == '\0') - return -1; - strncpy(*ifname, match, sizeof(*ifname)); - return 0; -} - -/** - * 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 *)((uintptr_t)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 *) - ((uintptr_t)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((rte_pktmbuf_mtod(buf, uintptr_t) - - (uintptr_t)buf) <= 0xffff); - WR_ID(wr->wr_id).offset = - (rte_pktmbuf_mtod(buf, uintptr_t) - - (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 = rte_pktmbuf_mtod(buf, uintptr_t); - if (txq->priv->vf) - rte_prefetch0((volatile void *) - (uintptr_t)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 = rte_pktmbuf_mtod(buf, uintptr_t); - 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_head = 0; - 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 *)((uintptr_t)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_head = 0; - 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 *)((uintptr_t)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 *)((uintptr_t)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; - const unsigned int elts_n = rxq->elts_n; - unsigned int elts_head = rxq->elts_head; - 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)[elts_head]; - 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. */ -#ifdef NDEBUG - (void)wr_id; -#endif - 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)); - assert(elts_head < rxq->elts_n); - assert(rxq->elts_head < rxq->elts_n); - /* 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) { - *pkt_buf_next = 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: - if (++elts_head >= elts_n) - elts_head = 0; - 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(); - } - rxq->elts_head = elts_head; -#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; - const unsigned int elts_n = rxq->elts_n; - unsigned int elts_head = rxq->elts_head; - 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)[elts_head]; - struct ibv_recv_wr *wr = &elt->wr; - struct rte_mbuf *seg = (void *)((uintptr_t)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); - assert(elts_head < rxq->elts_n); - assert(rxq->elts_head < rxq->elts_n); - /* 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: - if (++elts_head >= elts_n) - elts_head = 0; - 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(); - } - rxq->elts_head = elts_head; -#ifdef MLX4_PMD_SOFT_COUNTERS - /* Increase packets counter. */ - rxq->stats.ipackets += ret; -#endif - return ret; -} - -/** - * Allocate a Queue Pair. - * Optionally setup inline receive if 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, - .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, - .pd = priv->pd, - }; - -#ifdef INLINE_RECV - attr.max_inl_recv = priv->inl_recv_size; - attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV; -#endif - return ibv_exp_create_qp(priv->ctx, &attr); -} - -#ifdef RSS_SUPPORT - -/** - * Allocate a RSS Queue Pair. - * Optionally setup inline receive if supported. - * - * @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, - .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.max_inl_recv = priv->inl_recv_size, - 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 *) - ((uintptr_t)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; +#include +#include +#include +#include +#include +#include +#include +#include - 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; +#include "mlx4.h" +#include "mlx4_glue.h" +#include "mlx4_flow.h" +#include "mlx4_mr.h" +#include "mlx4_rxtx.h" +#include "mlx4_utils.h" - 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; -} +struct mlx4_dev_list mlx4_mem_event_cb_list = + LIST_HEAD_INITIALIZER(mlx4_mem_event_cb_list); + +rte_rwlock_t mlx4_mem_event_rwlock = RTE_RWLOCK_INITIALIZER; + +/** Configuration structure for device arguments. */ +struct mlx4_conf { + struct { + uint32_t present; /**< Bit-field for existing ports. */ + uint32_t enabled; /**< Bit-field for user-enabled ports. */ + } ports; +}; + +/* Available parameters list. */ +const char *pmd_mlx4_init_params[] = { + MLX4_PMD_PORT_KVARG, + NULL, +}; + +static void mlx4_dev_stop(struct rte_eth_dev *dev); /** - * DPDK callback to get flow control status. + * DPDK callback for Ethernet device configuration. * * @param dev * Pointer to Ethernet device structure. - * @param[out] fc_conf - * Flow control output buffer. * * @return - * 0 on success, negative errno value on failure. + * 0 on success, negative errno value otherwise and rte_errno is set. */ static int -mlx4_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) +mlx4_dev_configure(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; - struct ifreq ifr; - struct ethtool_pauseparam ethpause = { - .cmd = ETHTOOL_GPAUSEPARAM - }; + struct rte_flow_error error; 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; + /* Prepare internal flow rules. */ + ret = mlx4_flow_sync(priv, &error); + if (ret) { + ERROR("cannot set up internal flow rules (code %d, \"%s\")," + " flow error type %d, cause %p, message: %s", + -ret, strerror(-ret), error.type, error.cause, + error.message ? error.message : "(unspecified)"); + goto exit; } - - 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; + ret = mlx4_intr_install(priv); + if (ret) + ERROR("%p: interrupt handler installation failed", + (void *)dev); +exit: + return ret; } /** - * DPDK callback to modify flow control parameters. + * DPDK callback to start the device. + * + * Simulate device start by initializing common RSS resources and attaching + * all configured flows. * * @param dev * Pointer to Ethernet device structure. - * @param[in] fc_conf - * Flow control parameters. * * @return - * 0 on success, negative errno value on failure. + * 0 on success, negative errno value otherwise and rte_errno is set. */ static int -mlx4_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) +mlx4_dev_start(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; - struct ifreq ifr; - struct ethtool_pauseparam ethpause = { - .cmd = ETHTOOL_SPAUSEPARAM - }; + struct rte_flow_error error; 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; + if (priv->started) + return 0; + DEBUG("%p: attaching configured flows to all RX queues", (void *)dev); + priv->started = 1; + ret = mlx4_rss_init(priv); + if (ret) { + ERROR("%p: cannot initialize RSS resources: %s", + (void *)dev, strerror(-ret)); + goto err; } - ret = 0; - -out: - priv_unlock(priv); - assert(ret >= 0); - return -ret; +#ifndef NDEBUG + mlx4_mr_dump_dev(dev); +#endif + ret = mlx4_rxq_intr_enable(priv); + if (ret) { + ERROR("%p: interrupt handler installation failed", + (void *)dev); + goto err; + } + ret = mlx4_flow_sync(priv, &error); + if (ret) { + ERROR("%p: cannot attach flow rules (code %d, \"%s\")," + " flow error type %d, cause %p, message: %s", + (void *)dev, + -ret, strerror(-ret), error.type, error.cause, + error.message ? error.message : "(unspecified)"); + goto err; + } + rte_wmb(); + dev->tx_pkt_burst = mlx4_tx_burst; + dev->rx_pkt_burst = mlx4_rx_burst; + return 0; +err: + mlx4_dev_stop(dev); + return ret; } /** - * Configure a VLAN filter. + * DPDK callback to stop the device. + * + * Simulate device stop by detaching all configured flows. * * @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) +static void +mlx4_dev_stop(struct rte_eth_dev *dev) { 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; + if (!priv->started) + return; + DEBUG("%p: detaching flows from all RX queues", (void *)dev); + priv->started = 0; + dev->tx_pkt_burst = mlx4_tx_burst_removed; + dev->rx_pkt_burst = mlx4_rx_burst_removed; + rte_wmb(); + mlx4_flow_sync(priv, NULL); + mlx4_rxq_intr_disable(priv); + mlx4_rss_deinit(priv); } /** - * DPDK callback to configure a VLAN filter. + * DPDK callback to close the device. + * + * Destroy all queues and objects, free memory. * * @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) +static void +mlx4_dev_close(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; - int ret; + unsigned int i; - priv_lock(priv); - ret = vlan_filter_set(dev, vlan_id, on); - priv_unlock(priv); - assert(ret >= 0); - return -ret; + DEBUG("%p: closing device \"%s\"", + (void *)dev, + ((priv->ctx != NULL) ? priv->ctx->device->name : "")); + dev->rx_pkt_burst = mlx4_rx_burst_removed; + dev->tx_pkt_burst = mlx4_tx_burst_removed; + rte_wmb(); + mlx4_flow_clean(priv); + mlx4_rss_deinit(priv); + for (i = 0; i != dev->data->nb_rx_queues; ++i) + mlx4_rx_queue_release(dev->data->rx_queues[i]); + for (i = 0; i != dev->data->nb_tx_queues; ++i) + mlx4_tx_queue_release(dev->data->tx_queues[i]); + mlx4_mr_release(dev); + if (priv->pd != NULL) { + assert(priv->ctx != NULL); + claim_zero(mlx4_glue->dealloc_pd(priv->pd)); + claim_zero(mlx4_glue->close_device(priv->ctx)); + } else + assert(priv->ctx == NULL); + mlx4_intr_uninstall(priv); + memset(priv, 0, sizeof(*priv)); } 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_set_link_down = mlx4_dev_set_link_down, + .dev_set_link_up = mlx4_dev_set_link_up, .dev_close = mlx4_dev_close, + .link_update = mlx4_link_update, .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, + .mac_addr_remove = mlx4_mac_addr_remove, + .mac_addr_add = mlx4_mac_addr_add, + .mac_addr_set = mlx4_mac_addr_set, .stats_get = mlx4_stats_get, .stats_reset = mlx4_stats_reset, - .queue_stats_mapping_set = NULL, .dev_infos_get = mlx4_dev_infos_get, + .dev_supported_ptypes_get = mlx4_dev_supported_ptypes_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 + .flow_ctrl_get = mlx4_flow_ctrl_get, + .flow_ctrl_set = mlx4_flow_ctrl_set, + .mtu_set = mlx4_mtu_set, + .filter_ctrl = mlx4_filter_ctrl, + .rx_queue_intr_enable = mlx4_rx_intr_enable, + .rx_queue_intr_disable = mlx4_rx_intr_disable, + .is_removed = mlx4_is_removed, }; /** @@ -4220,7 +262,7 @@ static const struct eth_dev_ops mlx4_dev_ops = { * PCI bus address output buffer. * * @return - * 0 on success, -1 on failure and errno is set. + * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_ibv_device_to_pci_addr(const struct ibv_device *device, @@ -4231,8 +273,10 @@ mlx4_ibv_device_to_pci_addr(const struct ibv_device *device, MKSTR(path, "%s/device/uevent", device->ibdev_path); file = fopen(path, "rb"); - if (file == NULL) - return -1; + if (file == NULL) { + rte_errno = errno; + return -rte_errno; + } while (fgets(line, sizeof(line), file) == line) { size_t len = strlen(line); int ret; @@ -4248,7 +292,7 @@ mlx4_ibv_device_to_pci_addr(const struct ibv_device *device, /* Extract information. */ if (sscanf(line, "PCI_SLOT_NAME=" - "%" SCNx16 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n", + "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n", &pci_addr->domain, &pci_addr->bus, &pci_addr->devid, @@ -4262,78 +306,191 @@ mlx4_ibv_device_to_pci_addr(const struct ibv_device *device, } /** - * Derive MAC address from port GID. + * Verify and store value for device argument. + * + * @param[in] key + * Key argument to verify. + * @param[in] val + * Value associated with key. + * @param[in, out] conf + * Shared configuration data. * - * @param[out] mac - * MAC address output buffer. - * @param port - * Physical port number. - * @param[in] gid - * Port GID. + * @return + * 0 on success, negative errno value otherwise and rte_errno is set. */ -static void -mac_from_gid(uint8_t (*mac)[ETHER_ADDR_LEN], uint32_t port, uint8_t *gid) +static int +mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf) { - memcpy(&(*mac)[0], gid + 8, 3); - memcpy(&(*mac)[3], gid + 13, 3); - if (port == 1) - (*mac)[0] ^= 2; -} + unsigned long tmp; + + errno = 0; + tmp = strtoul(val, NULL, 0); + if (errno) { + rte_errno = errno; + WARN("%s: \"%s\" is not a valid integer", key, val); + return -rte_errno; + } + if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) { + uint32_t ports = rte_log2_u32(conf->ports.present + 1); -/* 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]; + if (tmp >= ports) { + ERROR("port index %lu outside range [0,%" PRIu32 ")", + tmp, ports); + return -EINVAL; + } + if (!(conf->ports.present & (1 << tmp))) { + rte_errno = EINVAL; + ERROR("invalid port index %lu", tmp); + return -rte_errno; + } + conf->ports.enabled |= 1 << tmp; + } else { + rte_errno = EINVAL; + WARN("%s: unknown parameter", key); + return -rte_errno; + } + return 0; +} /** - * Get device index in mlx4_dev[] from PCI bus address. + * Parse device parameters. * - * @param[in] pci_addr - * PCI bus address to look for. + * @param devargs + * Device arguments structure. * * @return - * mlx4_dev[] index on success, -1 on failure. + * 0 on success, negative errno value otherwise and rte_errno is set. */ static int -mlx4_dev_idx(struct rte_pci_addr *pci_addr) +mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf) { - unsigned int i; - int ret = -1; + struct rte_kvargs *kvlist; + unsigned int arg_count; + int ret = 0; + int i; - 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; - } + if (devargs == NULL) + return 0; + kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params); + if (kvlist == NULL) { + rte_errno = EINVAL; + ERROR("failed to parse kvargs"); + return -rte_errno; + } + /* Process parameters. */ + for (i = 0; pmd_mlx4_init_params[i]; ++i) { + arg_count = rte_kvargs_count(kvlist, MLX4_PMD_PORT_KVARG); + while (arg_count-- > 0) { + ret = rte_kvargs_process(kvlist, + MLX4_PMD_PORT_KVARG, + (int (*)(const char *, + const char *, + void *)) + mlx4_arg_parse, + conf); + if (ret != 0) + goto free_kvlist; + } + } +free_kvlist: + rte_kvargs_free(kvlist); return ret; } /** - * Retrieve integer value from environment variable. + * Interpret RSS capabilities reported by device. * - * @param[in] name - * Environment variable name. + * This function returns the set of usable Verbs RSS hash fields, kernel + * quirks taken into account. + * + * @param ctx + * Verbs context. + * @param pd + * Verbs protection domain. + * @param device_attr_ex + * Extended device attributes to interpret. * * @return - * Integer value, 0 if the variable is not set. + * Usable RSS hash fields mask in Verbs format. */ -static int -mlx4_getenv_int(const char *name) +static uint64_t +mlx4_hw_rss_sup(struct ibv_context *ctx, struct ibv_pd *pd, + struct ibv_device_attr_ex *device_attr_ex) { - const char *val = getenv(name); + uint64_t hw_rss_sup = device_attr_ex->rss_caps.rx_hash_fields_mask; + struct ibv_cq *cq = NULL; + struct ibv_wq *wq = NULL; + struct ibv_rwq_ind_table *ind = NULL; + struct ibv_qp *qp = NULL; - if (val == NULL) - return 0; - return atoi(val); + if (!hw_rss_sup) { + WARN("no RSS capabilities reported; disabling support for UDP" + " RSS and inner VXLAN RSS"); + return IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4 | + IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6 | + IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP; + } + if (!(hw_rss_sup & IBV_RX_HASH_INNER)) + return hw_rss_sup; + /* + * Although reported as supported, missing code in some Linux + * versions (v4.15, v4.16) prevents the creation of hash QPs with + * inner capability. + * + * There is no choice but to attempt to instantiate a temporary RSS + * context in order to confirm its support. + */ + cq = mlx4_glue->create_cq(ctx, 1, NULL, NULL, 0); + wq = cq ? mlx4_glue->create_wq + (ctx, + &(struct ibv_wq_init_attr){ + .wq_type = IBV_WQT_RQ, + .max_wr = 1, + .max_sge = 1, + .pd = pd, + .cq = cq, + }) : NULL; + ind = wq ? mlx4_glue->create_rwq_ind_table + (ctx, + &(struct ibv_rwq_ind_table_init_attr){ + .log_ind_tbl_size = 0, + .ind_tbl = &wq, + .comp_mask = 0, + }) : NULL; + qp = ind ? mlx4_glue->create_qp_ex + (ctx, + &(struct ibv_qp_init_attr_ex){ + .comp_mask = + (IBV_QP_INIT_ATTR_PD | + IBV_QP_INIT_ATTR_RX_HASH | + IBV_QP_INIT_ATTR_IND_TABLE), + .qp_type = IBV_QPT_RAW_PACKET, + .pd = pd, + .rwq_ind_tbl = ind, + .rx_hash_conf = { + .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ, + .rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE, + .rx_hash_key = mlx4_rss_hash_key_default, + .rx_hash_fields_mask = hw_rss_sup, + }, + }) : NULL; + if (!qp) { + WARN("disabling unusable inner RSS capability due to kernel" + " quirk"); + hw_rss_sup &= ~IBV_RX_HASH_INNER; + } else { + claim_zero(mlx4_glue->destroy_qp(qp)); + } + if (ind) + claim_zero(mlx4_glue->destroy_rwq_ind_table(ind)); + if (wq) + claim_zero(mlx4_glue->destroy_wq(wq)); + if (cq) + claim_zero(mlx4_glue->destroy_cq(cq)); + return hw_rss_sup; } -static struct eth_driver mlx4_driver; +static struct rte_pci_driver mlx4_driver; /** * DPDK callback to register a PCI device. @@ -4347,40 +504,32 @@ static struct eth_driver mlx4_driver; * PCI device information. * * @return - * 0 on success, negative errno value on failure. + * 0 on success, negative errno value otherwise and rte_errno is set. */ static int -mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) +mlx4_pci_probe(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; + struct ibv_device_attr_ex device_attr_ex; + struct mlx4_conf conf = { + .ports.present = 0, + }; 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); + assert(pci_drv == &mlx4_driver); + list = mlx4_glue->get_device_list(&i); if (list == NULL) { - assert(errno); - if (errno == ENOSYS) { - WARN("cannot list devices, is ib_uverbs loaded?"); - return 0; - } - return -errno; + rte_errno = errno; + assert(rte_errno); + if (rte_errno == ENOSYS) + ERROR("cannot list devices, is ib_uverbs loaded?"); + return -rte_errno; } assert(i >= 0); /* @@ -4403,178 +552,162 @@ mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) 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]); + attr_ctx = mlx4_glue->open_device(list[i]); err = errno; break; } if (attr_ctx == NULL) { - ibv_free_device_list(list); + mlx4_glue->free_device_list(list); switch (err) { case 0: - WARN("cannot access device, is mlx4_ib loaded?"); - return 0; + rte_errno = ENODEV; + ERROR("cannot access device, is mlx4_ib loaded?"); + return -rte_errno; case EINVAL: - WARN("cannot use device, are drivers up to date?"); - return 0; + rte_errno = EINVAL; + ERROR("cannot use device, are drivers up to date?"); + return -rte_errno; } assert(err > 0); - return -err; + rte_errno = err; + return -rte_errno; } ibv_dev = list[i]; - DEBUG("device opened"); - if (ibv_query_device(attr_ctx, &device_attr)) + if (mlx4_glue->query_device(attr_ctx, &device_attr)) { + err = ENODEV; goto error; + } INFO("%u port(s) detected", device_attr.phys_port_cnt); - + conf.ports.present |= (UINT64_C(1) << device_attr.phys_port_cnt) - 1; + if (mlx4_args(pci_dev->device.devargs, &conf)) { + ERROR("failed to process device arguments"); + err = EINVAL; + goto error; + } + /* Use all ports when none are defined */ + if (!conf.ports.enabled) + conf.ports.enabled = conf.ports.present; + /* Retrieve extended device attributes. */ + if (mlx4_glue->query_device_ex(attr_ctx, NULL, &device_attr_ex)) { + err = ENODEV; + goto error; + } + assert(device_attr.max_sge >= MLX4_MAX_SGE); 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; -#ifdef HAVE_EXP_QUERY_DEVICE - struct ibv_exp_device_attr exp_device_attr; -#endif /* HAVE_EXP_QUERY_DEVICE */ + struct rte_eth_dev *eth_dev = NULL; struct ether_addr mac; - union ibv_gid temp_gid; - -#ifdef HAVE_EXP_QUERY_DEVICE - exp_device_attr.comp_mask = IBV_EXP_DEVICE_ATTR_EXP_CAP_FLAGS; -#ifdef RSS_SUPPORT - exp_device_attr.comp_mask |= IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ; -#endif /* RSS_SUPPORT */ -#endif /* HAVE_EXP_QUERY_DEVICE */ - - DEBUG("using port %u (%08" PRIx32 ")", port, test); - ctx = ibv_open_device(ibv_dev); - if (ctx == NULL) + /* If port is not enabled, skip. */ + if (!(conf.ports.enabled & (1 << i))) + continue; + DEBUG("using port %u", port); + ctx = mlx4_glue->open_device(ibv_dev); + if (ctx == NULL) { + err = ENODEV; goto port_error; - + } /* Check port status. */ - err = ibv_query_port(ctx, port, &port_attr); + err = mlx4_glue->query_port(ctx, port, &port_attr); if (err) { + err = ENODEV; ERROR("port query failed: %s", strerror(err)); goto port_error; } + if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) { + err = ENOTSUP; + ERROR("port %d is not configured in Ethernet mode", + port); + 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); - + DEBUG("port %d is not active: \"%s\" (%d)", + port, mlx4_glue->port_state_str(port_attr.state), + port_attr.state); + /* Make asynchronous FD non-blocking to handle interrupts. */ + err = mlx4_fd_set_non_blocking(ctx->async_fd); + if (err) { + ERROR("cannot make asynchronous FD non-blocking: %s", + strerror(err)); + goto port_error; + } /* Allocate protection domain. */ - pd = ibv_alloc_pd(ctx); + pd = mlx4_glue->alloc_pd(ctx); if (pd == NULL) { - ERROR("PD allocation failure"); err = ENOMEM; + ERROR("PD allocation failure"); 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; + ERROR("priv allocation failure"); 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 HAVE_EXP_QUERY_DEVICE - if (ibv_exp_query_device(ctx, &exp_device_attr)) { - ERROR("ibv_exp_query_device() failed"); - goto port_error; - } -#ifdef RSS_SUPPORT - 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 */ -#endif /* HAVE_EXP_QUERY_DEVICE */ - - (void)mlx4_getenv_int; priv->vf = vf; - if (ibv_query_gid(ctx, port, 0, &temp_gid)) { - ERROR("ibv_query_gid() failure"); + priv->hw_csum = !!(device_attr.device_cap_flags & + IBV_DEVICE_RAW_IP_CSUM); + DEBUG("checksum offloading is %ssupported", + (priv->hw_csum ? "" : "not ")); + /* Only ConnectX-3 Pro supports tunneling. */ + priv->hw_csum_l2tun = + priv->hw_csum && + (device_attr.vendor_part_id == + PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO); + DEBUG("L2 tunnel checksum offloads are %ssupported", + priv->hw_csum_l2tun ? "" : "not "); + priv->hw_rss_sup = mlx4_hw_rss_sup(priv->ctx, priv->pd, + &device_attr_ex); + DEBUG("supported RSS hash fields mask: %016" PRIx64, + priv->hw_rss_sup); + priv->hw_rss_max_qps = + device_attr_ex.rss_caps.max_rwq_indirection_table_size; + DEBUG("MAX RSS queues %d", priv->hw_rss_max_qps); + priv->hw_fcs_strip = !!(device_attr_ex.raw_packet_caps & + IBV_RAW_PACKET_CAP_SCATTER_FCS); + DEBUG("FCS stripping toggling is %ssupported", + priv->hw_fcs_strip ? "" : "not "); + priv->tso = + ((device_attr_ex.tso_caps.max_tso > 0) && + (device_attr_ex.tso_caps.supported_qpts & + (1 << IBV_QPT_RAW_PACKET))); + if (priv->tso) + priv->tso_max_payload_sz = + device_attr_ex.tso_caps.max_tso; + DEBUG("TSO is %ssupported", + priv->tso ? "" : "not "); + /* Configure the first MAC address by default. */ + err = mlx4_get_mac(priv, &mac.addr_bytes); + if (err) { + ERROR("cannot get MAC address, is mlx4_en loaded?" + " (error: %s)", strerror(err)); 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" })); + /* Register MAC address. */ + priv->mac[0] = mac; #ifndef NDEBUG { char ifname[IF_NAMESIZE]; - if (priv_get_ifname(priv, &ifname) == 0) + if (mlx4_get_ifname(priv, &ifname) == 0) DEBUG("port %u ifname is \"%s\"", priv->port, ifname); else @@ -4582,118 +715,303 @@ mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) } #endif /* Get actual MTU if possible. */ - priv_get_mtu(priv, &priv->mtu); + mlx4_mtu_get(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); + mlx4_glue->get_device_name(ibv_dev), port); + eth_dev = rte_eth_dev_allocate(name); } if (eth_dev == NULL) { - ERROR("can not allocate rte ethdev"); err = ENOMEM; + ERROR("can not allocate rte ethdev"); 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; - + eth_dev->data->mac_addrs = priv->mac; + eth_dev->device = &pci_dev->device; + rte_eth_copy_pci_info(eth_dev, pci_dev); + /* Initialize local interrupt handle for current port. */ + priv->intr_handle = (struct rte_intr_handle){ + .fd = -1, + .type = RTE_INTR_HANDLE_EXT, + }; + /* + * Override ethdev interrupt handle pointer with private + * handle instead of that of the parent PCI device used by + * default. This prevents it from being shared between all + * ports of the same PCI device since each of them is + * associated its own Verbs context. + * + * Rx interrupts in particular require this as the PMD has + * no control over the registration of queue interrupts + * besides setting up eth_dev->intr_handle, the rest is + * handled by rte_intr_rx_ctl(). + */ + eth_dev->intr_handle = &priv->intr_handle; 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); + mlx4_dev_set_link_up(priv->dev); + /* Update link status once if waiting for LSC. */ + if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) + mlx4_link_update(eth_dev, 0); + /* + * Once the device is added to the list of memory event + * callback, its global MR cache table cannot be expanded + * on the fly because of deadlock. If it overflows, lookup + * should be done by searching MR list linearly, which is slow. + */ + err = mlx4_mr_btree_init(&priv->mr.cache, + MLX4_MR_BTREE_CACHE_N * 2, + eth_dev->device->numa_node); + if (err) { + /* rte_errno is already set. */ + goto port_error; + } + /* Add device to memory callback list. */ + rte_rwlock_write_lock(&mlx4_mem_event_rwlock); + LIST_INSERT_HEAD(&mlx4_mem_event_cb_list, priv, mem_event_cb); + rte_rwlock_write_unlock(&mlx4_mem_event_rwlock); + rte_eth_dev_probing_finish(eth_dev); continue; - port_error: rte_free(priv); + if (eth_dev != NULL) + eth_dev->data->dev_private = NULL; if (pd) - claim_zero(ibv_dealloc_pd(pd)); + claim_zero(mlx4_glue->dealloc_pd(pd)); if (ctx) - claim_zero(ibv_close_device(ctx)); + claim_zero(mlx4_glue->close_device(ctx)); + if (eth_dev != NULL) { + /* mac_addrs must not be freed because part of dev_private */ + eth_dev->data->mac_addrs = NULL; + rte_eth_dev_release_port(eth_dev); + } 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)); + claim_zero(mlx4_glue->close_device(attr_ctx)); if (list) - ibv_free_device_list(list); - assert(err >= 0); + mlx4_glue->free_device_list(list); + if (err) + rte_errno = err; 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 + RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, + PCI_DEVICE_ID_MELLANOX_CONNECTX3) }, { - .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 + RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, + PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO) }, { - .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 + RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, + PCI_DEVICE_ID_MELLANOX_CONNECTX3VF) }, { .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, +static struct rte_pci_driver mlx4_driver = { + .driver = { + .name = MLX4_DRIVER_NAME }, - .dev_private_size = sizeof(struct priv) + .id_table = mlx4_pci_id_map, + .probe = mlx4_pci_probe, + .drv_flags = RTE_PCI_DRV_INTR_LSC | + RTE_PCI_DRV_INTR_RMV, }; +#ifdef RTE_IBVERBS_LINK_DLOPEN + /** - * Driver initialization routine. + * Suffix RTE_EAL_PMD_PATH with "-glue". + * + * This function performs a sanity check on RTE_EAL_PMD_PATH before + * suffixing its last component. + * + * @param buf[out] + * Output buffer, should be large enough otherwise NULL is returned. + * @param size + * Size of @p out. + * + * @return + * Pointer to @p buf or @p NULL in case suffix cannot be appended. + */ +static char * +mlx4_glue_path(char *buf, size_t size) +{ + static const char *const bad[] = { "/", ".", "..", NULL }; + const char *path = RTE_EAL_PMD_PATH; + size_t len = strlen(path); + size_t off; + int i; + + while (len && path[len - 1] == '/') + --len; + for (off = len; off && path[off - 1] != '/'; --off) + ; + for (i = 0; bad[i]; ++i) + if (!strncmp(path + off, bad[i], (int)(len - off))) + goto error; + i = snprintf(buf, size, "%.*s-glue", (int)len, path); + if (i == -1 || (size_t)i >= size) + goto error; + return buf; +error: + ERROR("unable to append \"-glue\" to last component of" + " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\")," + " please re-configure DPDK"); + return NULL; +} + +/** + * Initialization routine for run-time dependency on rdma-core. */ static int -rte_mlx4_pmd_init(const char *name, const char *args) +mlx4_glue_init(void) { - (void)name; - (void)args; - rte_eal_pci_register(&mlx4_driver.pci_drv); + char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")]; + const char *path[] = { + /* + * A basic security check is necessary before trusting + * MLX4_GLUE_PATH, which may override RTE_EAL_PMD_PATH. + */ + (geteuid() == getuid() && getegid() == getgid() ? + getenv("MLX4_GLUE_PATH") : NULL), + /* + * When RTE_EAL_PMD_PATH is set, use its glue-suffixed + * variant, otherwise let dlopen() look up libraries on its + * own. + */ + (*RTE_EAL_PMD_PATH ? + mlx4_glue_path(glue_path, sizeof(glue_path)) : ""), + }; + unsigned int i = 0; + void *handle = NULL; + void **sym; + const char *dlmsg; + + while (!handle && i != RTE_DIM(path)) { + const char *end; + size_t len; + int ret; + + if (!path[i]) { + ++i; + continue; + } + end = strpbrk(path[i], ":;"); + if (!end) + end = path[i] + strlen(path[i]); + len = end - path[i]; + ret = 0; + do { + char name[ret + 1]; + + ret = snprintf(name, sizeof(name), "%.*s%s" MLX4_GLUE, + (int)len, path[i], + (!len || *(end - 1) == '/') ? "" : "/"); + if (ret == -1) + break; + if (sizeof(name) != (size_t)ret + 1) + continue; + DEBUG("looking for rdma-core glue as \"%s\"", name); + handle = dlopen(name, RTLD_LAZY); + break; + } while (1); + path[i] = end + 1; + if (!*end) + ++i; + } + if (!handle) { + rte_errno = EINVAL; + dlmsg = dlerror(); + if (dlmsg) + WARN("cannot load glue library: %s", dlmsg); + goto glue_error; + } + sym = dlsym(handle, "mlx4_glue"); + if (!sym || !*sym) { + rte_errno = EINVAL; + dlmsg = dlerror(); + if (dlmsg) + ERROR("cannot resolve glue symbol: %s", dlmsg); + goto glue_error; + } + mlx4_glue = *sym; return 0; +glue_error: + if (handle) + dlclose(handle); + WARN("cannot initialize PMD due to missing run-time" + " dependency on rdma-core libraries (libibverbs," + " libmlx4)"); + return -rte_errno; } -static struct rte_driver rte_mlx4_driver = { - .type = PMD_PDEV, - .name = MLX4_DRIVER_NAME, - .init = rte_mlx4_pmd_init, -}; +#endif + +/** + * Driver initialization routine. + */ +RTE_INIT(rte_mlx4_pmd_init) +{ + /* + * MLX4_DEVICE_FATAL_CLEANUP tells ibv_destroy functions we + * want to get success errno value in case of calling them + * when the device was removed. + */ + setenv("MLX4_DEVICE_FATAL_CLEANUP", "1", 1); + /* + * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use + * huge pages. Calling ibv_fork_init() during init allows + * applications to use fork() safely for purposes other than + * using this PMD, which is not supported in forked processes. + */ + setenv("RDMAV_HUGEPAGES_SAFE", "1", 1); +#ifdef RTE_IBVERBS_LINK_DLOPEN + if (mlx4_glue_init()) + return; + assert(mlx4_glue); +#endif +#ifndef NDEBUG + /* Glue structure must not contain any NULL pointers. */ + { + unsigned int i; + + for (i = 0; i != sizeof(*mlx4_glue) / sizeof(void *); ++i) + assert(((const void *const *)mlx4_glue)[i]); + } +#endif + if (strcmp(mlx4_glue->version, MLX4_GLUE_VERSION)) { + ERROR("rdma-core glue \"%s\" mismatch: \"%s\" is required", + mlx4_glue->version, MLX4_GLUE_VERSION); + return; + } + mlx4_glue->fork_init(); + rte_pci_register(&mlx4_driver); + rte_mem_event_callback_register("MLX4_MEM_EVENT_CB", + mlx4_mr_mem_event_cb, NULL); +} -PMD_REGISTER_DRIVER(rte_mlx4_driver) +RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__); +RTE_PMD_REGISTER_PCI_TABLE(net_mlx4, mlx4_pci_id_map); +RTE_PMD_REGISTER_KMOD_DEP(net_mlx4, + "* ib_uverbs & mlx4_en & mlx4_core & mlx4_ib");