RedHat virtio
M: Changchun Ouyang <changchun.ouyang@intel.com>
-F: lib/librte_pmd_virtio/
+F: drivers/net/virtio/
F: doc/guides/nics/virtio.rst
F: lib/librte_vhost/
F: doc/guides/prog_guide/vhost_lib.rst
+-- librte_mempool # memory pool manager (fixedsized objects)
+-- librte_meter # QoS metering library
+-- librte_net # various IP-related headers
- +-- librte_pmd_virtio # virtio poll mode driver
+-- librte_pmd_vmxnet3 # VMXNET3 poll mode driver
+-- librte_pmd_xenvirt # Xen virtio poll mode driver
+-- librte_power # power management library
+-- null # NULL poll mode driver for testing
+-- pcap # PCAP poll mode driver
+-- ring # ring poll mode driver
+ +-- virtio # virtio poll mode driver
Applications
------------
DIRS-$(CONFIG_RTE_LIBRTE_PMD_NULL) += null
DIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += pcap
DIRS-$(CONFIG_RTE_LIBRTE_PMD_RING) += ring
+DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio
include $(RTE_SDK)/mk/rte.sharelib.mk
include $(RTE_SDK)/mk/rte.subdir.mk
--- /dev/null
+# BSD LICENSE
+#
+# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+# All rights reserved.
+#
+# 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 Intel Corporation nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+#
+# library name
+#
+LIB = librte_pmd_virtio.a
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+EXPORT_MAP := rte_pmd_virtio_version.map
+
+LIBABIVER := 1
+
+#
+# all source are stored in SRCS-y
+#
+SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtqueue.c
+SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_pci.c
+SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_rxtx.c
+SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_ethdev.c
+
+
+# this lib depends upon:
+DEPDIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += lib/librte_eal lib/librte_ether
+DEPDIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += lib/librte_mempool lib/librte_mbuf
+DEPDIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += lib/librte_net lib/librte_malloc
+
+include $(RTE_SDK)/mk/rte.lib.mk
--- /dev/null
+DPDK_2.0 {
+
+ local: *;
+};
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#ifdef RTE_EXEC_ENV_LINUXAPP
+#include <dirent.h>
+#include <fcntl.h>
+#endif
+
+#include <rte_ethdev.h>
+#include <rte_memcpy.h>
+#include <rte_string_fns.h>
+#include <rte_memzone.h>
+#include <rte_malloc.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_pci.h>
+#include <rte_ether.h>
+#include <rte_common.h>
+
+#include <rte_memory.h>
+#include <rte_eal.h>
+#include <rte_dev.h>
+
+#include "virtio_ethdev.h"
+#include "virtio_pci.h"
+#include "virtio_logs.h"
+#include "virtqueue.h"
+
+
+static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
+static int virtio_dev_configure(struct rte_eth_dev *dev);
+static int virtio_dev_start(struct rte_eth_dev *dev);
+static void virtio_dev_stop(struct rte_eth_dev *dev);
+static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
+static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
+static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
+static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
+static void virtio_dev_info_get(struct rte_eth_dev *dev,
+ struct rte_eth_dev_info *dev_info);
+static int virtio_dev_link_update(struct rte_eth_dev *dev,
+ __rte_unused int wait_to_complete);
+
+static void virtio_set_hwaddr(struct virtio_hw *hw);
+static void virtio_get_hwaddr(struct virtio_hw *hw);
+
+static void virtio_dev_rx_queue_release(__rte_unused void *rxq);
+static void virtio_dev_tx_queue_release(__rte_unused void *txq);
+
+static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
+static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
+static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
+static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
+ uint16_t vlan_id, int on);
+static void virtio_mac_addr_add(struct rte_eth_dev *dev,
+ struct ether_addr *mac_addr,
+ uint32_t index, uint32_t vmdq __rte_unused);
+static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
+static void virtio_mac_addr_set(struct rte_eth_dev *dev,
+ struct ether_addr *mac_addr);
+
+static int virtio_dev_queue_stats_mapping_set(
+ __rte_unused struct rte_eth_dev *eth_dev,
+ __rte_unused uint16_t queue_id,
+ __rte_unused uint8_t stat_idx,
+ __rte_unused uint8_t is_rx);
+
+/*
+ * The set of PCI devices this driver supports
+ */
+static const struct rte_pci_id pci_id_virtio_map[] = {
+
+#define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
+#include "rte_pci_dev_ids.h"
+
+{ .vendor_id = 0, /* sentinel */ },
+};
+
+static int
+virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
+ int *dlen, int pkt_num)
+{
+ uint16_t head = vq->vq_desc_head_idx, i;
+ int k, sum = 0;
+ virtio_net_ctrl_ack status = ~0;
+ struct virtio_pmd_ctrl result;
+
+ ctrl->status = status;
+
+ if (!vq->hw->cvq) {
+ PMD_INIT_LOG(ERR,
+ "%s(): Control queue is not supported.",
+ __func__);
+ return -1;
+ }
+
+ PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
+ "vq->hw->cvq = %p vq = %p",
+ vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
+
+ if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
+ return -1;
+
+ memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
+ sizeof(struct virtio_pmd_ctrl));
+
+ /*
+ * Format is enforced in qemu code:
+ * One TX packet for header;
+ * At least one TX packet per argument;
+ * One RX packet for ACK.
+ */
+ vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
+ vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
+ vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
+ vq->vq_free_cnt--;
+ i = vq->vq_ring.desc[head].next;
+
+ for (k = 0; k < pkt_num; k++) {
+ vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
+ vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
+ + sizeof(struct virtio_net_ctrl_hdr)
+ + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
+ vq->vq_ring.desc[i].len = dlen[k];
+ sum += dlen[k];
+ vq->vq_free_cnt--;
+ i = vq->vq_ring.desc[i].next;
+ }
+
+ vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
+ vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
+ + sizeof(struct virtio_net_ctrl_hdr);
+ vq->vq_ring.desc[i].len = sizeof(ctrl->status);
+ vq->vq_free_cnt--;
+
+ vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
+
+ vq_update_avail_ring(vq, head);
+ vq_update_avail_idx(vq);
+
+ PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
+
+ virtqueue_notify(vq);
+
+ rte_rmb();
+ while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
+ rte_rmb();
+ usleep(100);
+ }
+
+ while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
+ uint32_t idx, desc_idx, used_idx;
+ struct vring_used_elem *uep;
+
+ used_idx = (uint32_t)(vq->vq_used_cons_idx
+ & (vq->vq_nentries - 1));
+ uep = &vq->vq_ring.used->ring[used_idx];
+ idx = (uint32_t) uep->id;
+ desc_idx = idx;
+
+ while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
+ desc_idx = vq->vq_ring.desc[desc_idx].next;
+ vq->vq_free_cnt++;
+ }
+
+ vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
+ vq->vq_desc_head_idx = idx;
+
+ vq->vq_used_cons_idx++;
+ vq->vq_free_cnt++;
+ }
+
+ PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
+ vq->vq_free_cnt, vq->vq_desc_head_idx);
+
+ memcpy(&result, vq->virtio_net_hdr_mz->addr,
+ sizeof(struct virtio_pmd_ctrl));
+
+ return result.status;
+}
+
+static int
+virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct virtio_pmd_ctrl ctrl;
+ int dlen[1];
+ int ret;
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
+ ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
+ memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
+
+ dlen[0] = sizeof(uint16_t);
+
+ ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+
+ if (ret) {
+ PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
+ "failed, this is too late now...");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int virtio_dev_queue_setup(struct rte_eth_dev *dev,
+ int queue_type,
+ uint16_t queue_idx,
+ uint16_t vtpci_queue_idx,
+ uint16_t nb_desc,
+ unsigned int socket_id,
+ struct virtqueue **pvq)
+{
+ char vq_name[VIRTQUEUE_MAX_NAME_SZ];
+ const struct rte_memzone *mz;
+ uint16_t vq_size;
+ int size;
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct virtqueue *vq = NULL;
+
+ /* Write the virtqueue index to the Queue Select Field */
+ VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
+ PMD_INIT_LOG(DEBUG, "selecting queue: %d", vtpci_queue_idx);
+
+ /*
+ * Read the virtqueue size from the Queue Size field
+ * Always power of 2 and if 0 virtqueue does not exist
+ */
+ vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
+ PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d", vq_size, nb_desc);
+ if (nb_desc == 0)
+ nb_desc = vq_size;
+ if (vq_size == 0) {
+ PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
+ return -EINVAL;
+ } else if (!rte_is_power_of_2(vq_size)) {
+ PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
+ return -EINVAL;
+ } else if (nb_desc != vq_size) {
+ PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size",
+ nb_desc, vq_size);
+ nb_desc = vq_size;
+ }
+
+ if (queue_type == VTNET_RQ) {
+ snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
+ dev->data->port_id, queue_idx);
+ vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+ vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
+ } else if (queue_type == VTNET_TQ) {
+ snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
+ dev->data->port_id, queue_idx);
+ vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+ vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
+ } else if (queue_type == VTNET_CQ) {
+ snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
+ dev->data->port_id);
+ vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+ vq_size * sizeof(struct vq_desc_extra),
+ RTE_CACHE_LINE_SIZE);
+ }
+ if (vq == NULL) {
+ PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
+ return (-ENOMEM);
+ }
+
+ vq->hw = hw;
+ vq->port_id = dev->data->port_id;
+ vq->queue_id = queue_idx;
+ vq->vq_queue_index = vtpci_queue_idx;
+ vq->vq_nentries = vq_size;
+ vq->vq_free_cnt = vq_size;
+
+ /*
+ * Reserve a memzone for vring elements
+ */
+ size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
+ vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
+ PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
+
+ mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
+ socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
+ if (mz == NULL) {
+ rte_free(vq);
+ return -ENOMEM;
+ }
+
+ /*
+ * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
+ * and only accepts 32 bit page frame number.
+ * Check if the allocated physical memory exceeds 16TB.
+ */
+ if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
+ PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
+ rte_free(vq);
+ return -ENOMEM;
+ }
+
+ memset(mz->addr, 0, sizeof(mz->len));
+ vq->mz = mz;
+ vq->vq_ring_mem = mz->phys_addr;
+ vq->vq_ring_virt_mem = mz->addr;
+ PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%"PRIx64, (uint64_t)mz->phys_addr);
+ PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
+ vq->virtio_net_hdr_mz = NULL;
+ vq->virtio_net_hdr_mem = 0;
+
+ if (queue_type == VTNET_TQ) {
+ /*
+ * For each xmit packet, allocate a virtio_net_hdr
+ */
+ snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
+ dev->data->port_id, queue_idx);
+ vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
+ vq_size * hw->vtnet_hdr_size,
+ socket_id, 0, RTE_CACHE_LINE_SIZE);
+ if (vq->virtio_net_hdr_mz == NULL) {
+ rte_free(vq);
+ return -ENOMEM;
+ }
+ vq->virtio_net_hdr_mem =
+ vq->virtio_net_hdr_mz->phys_addr;
+ memset(vq->virtio_net_hdr_mz->addr, 0,
+ vq_size * hw->vtnet_hdr_size);
+ } else if (queue_type == VTNET_CQ) {
+ /* Allocate a page for control vq command, data and status */
+ snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
+ dev->data->port_id);
+ vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
+ PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
+ if (vq->virtio_net_hdr_mz == NULL) {
+ rte_free(vq);
+ return -ENOMEM;
+ }
+ vq->virtio_net_hdr_mem =
+ vq->virtio_net_hdr_mz->phys_addr;
+ memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
+ }
+
+ /*
+ * Set guest physical address of the virtqueue
+ * in VIRTIO_PCI_QUEUE_PFN config register of device
+ */
+ VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
+ mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
+ *pvq = vq;
+ return 0;
+}
+
+static int
+virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
+ uint32_t socket_id)
+{
+ struct virtqueue *vq;
+ uint16_t nb_desc = 0;
+ int ret;
+ struct virtio_hw *hw = dev->data->dev_private;
+
+ PMD_INIT_FUNC_TRACE();
+ ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
+ vtpci_queue_idx, nb_desc, socket_id, &vq);
+
+ if (ret < 0) {
+ PMD_INIT_LOG(ERR, "control vq initialization failed");
+ return ret;
+ }
+
+ hw->cvq = vq;
+ return 0;
+}
+
+static void
+virtio_dev_close(struct rte_eth_dev *dev)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct rte_pci_device *pci_dev = dev->pci_dev;
+
+ PMD_INIT_LOG(DEBUG, "virtio_dev_close");
+
+ /* reset the NIC */
+ if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+ vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
+ vtpci_reset(hw);
+ hw->started = 0;
+ virtio_dev_free_mbufs(dev);
+}
+
+static void
+virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct virtio_pmd_ctrl ctrl;
+ int dlen[1];
+ int ret;
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+ ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
+ ctrl.data[0] = 1;
+ dlen[0] = 1;
+
+ ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+
+ if (ret)
+ PMD_INIT_LOG(ERR, "Failed to enable promisc");
+}
+
+static void
+virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct virtio_pmd_ctrl ctrl;
+ int dlen[1];
+ int ret;
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+ ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
+ ctrl.data[0] = 0;
+ dlen[0] = 1;
+
+ ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+
+ if (ret)
+ PMD_INIT_LOG(ERR, "Failed to disable promisc");
+}
+
+static void
+virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct virtio_pmd_ctrl ctrl;
+ int dlen[1];
+ int ret;
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+ ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
+ ctrl.data[0] = 1;
+ dlen[0] = 1;
+
+ ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+
+ if (ret)
+ PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
+}
+
+static void
+virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct virtio_pmd_ctrl ctrl;
+ int dlen[1];
+ int ret;
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+ ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
+ ctrl.data[0] = 0;
+ dlen[0] = 1;
+
+ ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+
+ if (ret)
+ PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
+}
+
+/*
+ * dev_ops for virtio, bare necessities for basic operation
+ */
+static const struct eth_dev_ops virtio_eth_dev_ops = {
+ .dev_configure = virtio_dev_configure,
+ .dev_start = virtio_dev_start,
+ .dev_stop = virtio_dev_stop,
+ .dev_close = virtio_dev_close,
+ .promiscuous_enable = virtio_dev_promiscuous_enable,
+ .promiscuous_disable = virtio_dev_promiscuous_disable,
+ .allmulticast_enable = virtio_dev_allmulticast_enable,
+ .allmulticast_disable = virtio_dev_allmulticast_disable,
+
+ .dev_infos_get = virtio_dev_info_get,
+ .stats_get = virtio_dev_stats_get,
+ .stats_reset = virtio_dev_stats_reset,
+ .link_update = virtio_dev_link_update,
+ .rx_queue_setup = virtio_dev_rx_queue_setup,
+ /* meaningfull only to multiple queue */
+ .rx_queue_release = virtio_dev_rx_queue_release,
+ .tx_queue_setup = virtio_dev_tx_queue_setup,
+ /* meaningfull only to multiple queue */
+ .tx_queue_release = virtio_dev_tx_queue_release,
+ /* collect stats per queue */
+ .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
+ .vlan_filter_set = virtio_vlan_filter_set,
+ .mac_addr_add = virtio_mac_addr_add,
+ .mac_addr_remove = virtio_mac_addr_remove,
+ .mac_addr_set = virtio_mac_addr_set,
+};
+
+static inline int
+virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
+ struct rte_eth_link *link)
+{
+ struct rte_eth_link *dst = link;
+ struct rte_eth_link *src = &(dev->data->dev_link);
+
+ if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+ *(uint64_t *)src) == 0)
+ return -1;
+
+ return 0;
+}
+
+/**
+ * Atomically writes the link status information into global
+ * structure rte_eth_dev.
+ *
+ * @param dev
+ * - Pointer to the structure rte_eth_dev to read from.
+ * - Pointer to the buffer to be saved with the link status.
+ *
+ * @return
+ * - On success, zero.
+ * - On failure, negative value.
+ */
+static inline int
+virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
+ struct rte_eth_link *link)
+{
+ struct rte_eth_link *dst = &(dev->data->dev_link);
+ struct rte_eth_link *src = link;
+
+ if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+ *(uint64_t *)src) == 0)
+ return -1;
+
+ return 0;
+}
+
+static void
+virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+ unsigned i;
+
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ const struct virtqueue *txvq = dev->data->tx_queues[i];
+ if (txvq == NULL)
+ continue;
+
+ stats->opackets += txvq->packets;
+ stats->obytes += txvq->bytes;
+ stats->oerrors += txvq->errors;
+
+ if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+ stats->q_opackets[i] = txvq->packets;
+ stats->q_obytes[i] = txvq->bytes;
+ }
+ }
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++) {
+ const struct virtqueue *rxvq = dev->data->rx_queues[i];
+ if (rxvq == NULL)
+ continue;
+
+ stats->ipackets += rxvq->packets;
+ stats->ibytes += rxvq->bytes;
+ stats->ierrors += rxvq->errors;
+
+ if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+ stats->q_ipackets[i] = rxvq->packets;
+ stats->q_ibytes[i] = rxvq->bytes;
+ }
+ }
+
+ stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
+}
+
+static void
+virtio_dev_stats_reset(struct rte_eth_dev *dev)
+{
+ unsigned int i;
+
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ struct virtqueue *txvq = dev->data->tx_queues[i];
+ if (txvq == NULL)
+ continue;
+
+ txvq->packets = 0;
+ txvq->bytes = 0;
+ txvq->errors = 0;
+ }
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++) {
+ struct virtqueue *rxvq = dev->data->rx_queues[i];
+ if (rxvq == NULL)
+ continue;
+
+ rxvq->packets = 0;
+ rxvq->bytes = 0;
+ rxvq->errors = 0;
+ }
+
+ dev->data->rx_mbuf_alloc_failed = 0;
+}
+
+static void
+virtio_set_hwaddr(struct virtio_hw *hw)
+{
+ vtpci_write_dev_config(hw,
+ offsetof(struct virtio_net_config, mac),
+ &hw->mac_addr, ETHER_ADDR_LEN);
+}
+
+static void
+virtio_get_hwaddr(struct virtio_hw *hw)
+{
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
+ vtpci_read_dev_config(hw,
+ offsetof(struct virtio_net_config, mac),
+ &hw->mac_addr, ETHER_ADDR_LEN);
+ } else {
+ eth_random_addr(&hw->mac_addr[0]);
+ virtio_set_hwaddr(hw);
+ }
+}
+
+static int
+virtio_mac_table_set(struct virtio_hw *hw,
+ const struct virtio_net_ctrl_mac *uc,
+ const struct virtio_net_ctrl_mac *mc)
+{
+ struct virtio_pmd_ctrl ctrl;
+ int err, len[2];
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
+ ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
+
+ len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
+ memcpy(ctrl.data, uc, len[0]);
+
+ len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
+ memcpy(ctrl.data + len[0], mc, len[1]);
+
+ err = virtio_send_command(hw->cvq, &ctrl, len, 2);
+ if (err != 0)
+ PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
+
+ return err;
+}
+
+static void
+virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
+ uint32_t index, uint32_t vmdq __rte_unused)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ const struct ether_addr *addrs = dev->data->mac_addrs;
+ unsigned int i;
+ struct virtio_net_ctrl_mac *uc, *mc;
+
+ if (index >= VIRTIO_MAX_MAC_ADDRS) {
+ PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
+ return;
+ }
+
+ uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
+ uc->entries = 0;
+ mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
+ mc->entries = 0;
+
+ for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
+ const struct ether_addr *addr
+ = (i == index) ? mac_addr : addrs + i;
+ struct virtio_net_ctrl_mac *tbl
+ = is_multicast_ether_addr(addr) ? mc : uc;
+
+ memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
+ }
+
+ virtio_mac_table_set(hw, uc, mc);
+}
+
+static void
+virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct ether_addr *addrs = dev->data->mac_addrs;
+ struct virtio_net_ctrl_mac *uc, *mc;
+ unsigned int i;
+
+ if (index >= VIRTIO_MAX_MAC_ADDRS) {
+ PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
+ return;
+ }
+
+ uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
+ uc->entries = 0;
+ mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
+ mc->entries = 0;
+
+ for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
+ struct virtio_net_ctrl_mac *tbl;
+
+ if (i == index || is_zero_ether_addr(addrs + i))
+ continue;
+
+ tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
+ memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
+ }
+
+ virtio_mac_table_set(hw, uc, mc);
+}
+
+static void
+virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+
+ memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
+
+ /* Use atomic update if available */
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
+ struct virtio_pmd_ctrl ctrl;
+ int len = ETHER_ADDR_LEN;
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
+ ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
+
+ memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
+ virtio_send_command(hw->cvq, &ctrl, &len, 1);
+ } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
+ virtio_set_hwaddr(hw);
+}
+
+static int
+virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct virtio_pmd_ctrl ctrl;
+ int len;
+
+ if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
+ return -ENOTSUP;
+
+ ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
+ ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
+ memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
+ len = sizeof(vlan_id);
+
+ return virtio_send_command(hw->cvq, &ctrl, &len, 1);
+}
+
+static void
+virtio_negotiate_features(struct virtio_hw *hw)
+{
+ uint32_t host_features, mask;
+
+ /* checksum offload not implemented */
+ mask = VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
+
+ /* TSO and LRO are only available when their corresponding
+ * checksum offload feature is also negotiated.
+ */
+ mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN;
+ mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
+ mask |= VTNET_LRO_FEATURES;
+
+ /* not negotiating INDIRECT descriptor table support */
+ mask |= VIRTIO_RING_F_INDIRECT_DESC;
+
+ /* Prepare guest_features: feature that driver wants to support */
+ hw->guest_features = VTNET_FEATURES & ~mask;
+ PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
+ hw->guest_features);
+
+ /* Read device(host) feature bits */
+ host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
+ PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
+ host_features);
+
+ /*
+ * Negotiate features: Subset of device feature bits are written back
+ * guest feature bits.
+ */
+ hw->guest_features = vtpci_negotiate_features(hw, host_features);
+ PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
+ hw->guest_features);
+}
+
+#ifdef RTE_EXEC_ENV_LINUXAPP
+static int
+parse_sysfs_value(const char *filename, unsigned long *val)
+{
+ FILE *f;
+ char buf[BUFSIZ];
+ char *end = NULL;
+
+ f = fopen(filename, "r");
+ if (f == NULL) {
+ PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
+ __func__, filename);
+ return -1;
+ }
+
+ if (fgets(buf, sizeof(buf), f) == NULL) {
+ PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
+ __func__, filename);
+ fclose(f);
+ return -1;
+ }
+ *val = strtoul(buf, &end, 0);
+ if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
+ PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
+ __func__, filename);
+ fclose(f);
+ return -1;
+ }
+ fclose(f);
+ return 0;
+}
+
+static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
+ unsigned int *uio_num)
+{
+ struct dirent *e;
+ DIR *dir;
+ char dirname[PATH_MAX];
+
+ /* depending on kernel version, uio can be located in uio/uioX
+ * or uio:uioX */
+ snprintf(dirname, sizeof(dirname),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
+ loc->domain, loc->bus, loc->devid, loc->function);
+ dir = opendir(dirname);
+ if (dir == NULL) {
+ /* retry with the parent directory */
+ snprintf(dirname, sizeof(dirname),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
+ loc->domain, loc->bus, loc->devid, loc->function);
+ dir = opendir(dirname);
+
+ if (dir == NULL) {
+ PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
+ return -1;
+ }
+ }
+
+ /* take the first file starting with "uio" */
+ while ((e = readdir(dir)) != NULL) {
+ /* format could be uio%d ...*/
+ int shortprefix_len = sizeof("uio") - 1;
+ /* ... or uio:uio%d */
+ int longprefix_len = sizeof("uio:uio") - 1;
+ char *endptr;
+
+ if (strncmp(e->d_name, "uio", 3) != 0)
+ continue;
+
+ /* first try uio%d */
+ errno = 0;
+ *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
+ if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
+ snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
+ break;
+ }
+
+ /* then try uio:uio%d */
+ errno = 0;
+ *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
+ if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
+ snprintf(buf, buflen, "%s/uio:uio%u", dirname,
+ *uio_num);
+ break;
+ }
+ }
+ closedir(dir);
+
+ /* No uio resource found */
+ if (e == NULL) {
+ PMD_INIT_LOG(ERR, "Could not find uio resource");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+virtio_has_msix(const struct rte_pci_addr *loc)
+{
+ DIR *d;
+ char dirname[PATH_MAX];
+
+ snprintf(dirname, sizeof(dirname),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
+ loc->domain, loc->bus, loc->devid, loc->function);
+
+ d = opendir(dirname);
+ if (d)
+ closedir(d);
+
+ return (d != NULL);
+}
+
+/* Extract I/O port numbers from sysfs */
+static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
+{
+ char dirname[PATH_MAX];
+ char filename[PATH_MAX];
+ unsigned long start, size;
+ unsigned int uio_num;
+
+ if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
+ return -1;
+
+ /* get portio size */
+ snprintf(filename, sizeof(filename),
+ "%s/portio/port0/size", dirname);
+ if (parse_sysfs_value(filename, &size) < 0) {
+ PMD_INIT_LOG(ERR, "%s(): cannot parse size",
+ __func__);
+ return -1;
+ }
+
+ /* get portio start */
+ snprintf(filename, sizeof(filename),
+ "%s/portio/port0/start", dirname);
+ if (parse_sysfs_value(filename, &start) < 0) {
+ PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
+ __func__);
+ return -1;
+ }
+ pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
+ pci_dev->mem_resource[0].len = (uint64_t)size;
+ PMD_INIT_LOG(DEBUG,
+ "PCI Port IO found start=0x%lx with size=0x%lx",
+ start, size);
+
+ /* save fd */
+ memset(dirname, 0, sizeof(dirname));
+ snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
+ pci_dev->intr_handle.fd = open(dirname, O_RDWR);
+ if (pci_dev->intr_handle.fd < 0) {
+ PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
+ dirname, strerror(errno));
+ return -1;
+ }
+
+ pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
+ pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
+
+ return 0;
+}
+
+/* Extract port I/O numbers from proc/ioports */
+static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
+{
+ uint16_t start, end;
+ int size;
+ FILE *fp;
+ char *line = NULL;
+ char pci_id[16];
+ int found = 0;
+ size_t linesz;
+
+ snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
+ pci_dev->addr.domain,
+ pci_dev->addr.bus,
+ pci_dev->addr.devid,
+ pci_dev->addr.function);
+
+ fp = fopen("/proc/ioports", "r");
+ if (fp == NULL) {
+ PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
+ return -1;
+ }
+
+ while (getdelim(&line, &linesz, '\n', fp) > 0) {
+ char *ptr = line;
+ char *left;
+ int n;
+
+ n = strcspn(ptr, ":");
+ ptr[n] = 0;
+ left = &ptr[n+1];
+
+ while (*left && isspace(*left))
+ left++;
+
+ if (!strncmp(left, pci_id, strlen(pci_id))) {
+ found = 1;
+
+ while (*ptr && isspace(*ptr))
+ ptr++;
+
+ sscanf(ptr, "%04hx-%04hx", &start, &end);
+ size = end - start + 1;
+
+ break;
+ }
+ }
+
+ free(line);
+ fclose(fp);
+
+ if (!found)
+ return -1;
+
+ pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
+ pci_dev->mem_resource[0].len = (uint64_t)size;
+ PMD_INIT_LOG(DEBUG,
+ "PCI Port IO found start=0x%x with size=0x%x",
+ start, size);
+
+ /* can't support lsc interrupt without uio */
+ pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
+
+ return 0;
+}
+
+/* Extract I/O port numbers from sysfs */
+static int virtio_resource_init(struct rte_pci_device *pci_dev)
+{
+ if (virtio_resource_init_by_uio(pci_dev) == 0)
+ return 0;
+ else
+ return virtio_resource_init_by_ioports(pci_dev);
+}
+
+#else
+static int
+virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
+{
+ /* nic_uio does not enable interrupts, return 0 (false). */
+ return 0;
+}
+
+static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
+{
+ /* no setup required */
+ return 0;
+}
+#endif
+
+/*
+ * Process Virtio Config changed interrupt and call the callback
+ * if link state changed.
+ */
+static void
+virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
+ void *param)
+{
+ struct rte_eth_dev *dev = param;
+ struct virtio_hw *hw = dev->data->dev_private;
+ uint8_t isr;
+
+ /* Read interrupt status which clears interrupt */
+ isr = vtpci_isr(hw);
+ PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
+
+ if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
+ PMD_DRV_LOG(ERR, "interrupt enable failed");
+
+ if (isr & VIRTIO_PCI_ISR_CONFIG) {
+ if (virtio_dev_link_update(dev, 0) == 0)
+ _rte_eth_dev_callback_process(dev,
+ RTE_ETH_EVENT_INTR_LSC);
+ }
+
+}
+
+static void
+rx_func_get(struct rte_eth_dev *eth_dev)
+{
+ struct virtio_hw *hw = eth_dev->data->dev_private;
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
+ eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
+ else
+ eth_dev->rx_pkt_burst = &virtio_recv_pkts;
+}
+
+/*
+ * This function is based on probe() function in virtio_pci.c
+ * It returns 0 on success.
+ */
+static int
+eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
+{
+ struct virtio_hw *hw = eth_dev->data->dev_private;
+ struct virtio_net_config *config;
+ struct virtio_net_config local_config;
+ uint32_t offset_conf = sizeof(config->mac);
+ struct rte_pci_device *pci_dev;
+
+ RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
+
+ eth_dev->dev_ops = &virtio_eth_dev_ops;
+ eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
+
+ if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+ rx_func_get(eth_dev);
+ return 0;
+ }
+
+ /* Allocate memory for storing MAC addresses */
+ eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
+ if (eth_dev->data->mac_addrs == NULL) {
+ PMD_INIT_LOG(ERR,
+ "Failed to allocate %d bytes needed to store MAC addresses",
+ ETHER_ADDR_LEN);
+ return -ENOMEM;
+ }
+
+ pci_dev = eth_dev->pci_dev;
+ if (virtio_resource_init(pci_dev) < 0)
+ return -1;
+
+ hw->use_msix = virtio_has_msix(&pci_dev->addr);
+ hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
+
+ /* Reset the device although not necessary at startup */
+ vtpci_reset(hw);
+
+ /* Tell the host we've noticed this device. */
+ vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
+
+ /* Tell the host we've known how to drive the device. */
+ vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
+ virtio_negotiate_features(hw);
+
+ rx_func_get(eth_dev);
+
+ /* Setting up rx_header size for the device */
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
+ hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
+ else
+ hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
+
+ /* Copy the permanent MAC address to: virtio_hw */
+ virtio_get_hwaddr(hw);
+ ether_addr_copy((struct ether_addr *) hw->mac_addr,
+ ð_dev->data->mac_addrs[0]);
+ PMD_INIT_LOG(DEBUG,
+ "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
+ hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
+ hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
+
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
+ config = &local_config;
+
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+ offset_conf += sizeof(config->status);
+ } else {
+ PMD_INIT_LOG(DEBUG,
+ "VIRTIO_NET_F_STATUS is not supported");
+ config->status = 0;
+ }
+
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
+ offset_conf += sizeof(config->max_virtqueue_pairs);
+ } else {
+ PMD_INIT_LOG(DEBUG,
+ "VIRTIO_NET_F_MQ is not supported");
+ config->max_virtqueue_pairs = 1;
+ }
+
+ vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
+
+ hw->max_rx_queues =
+ (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
+ VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
+ hw->max_tx_queues =
+ (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
+ VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
+
+ virtio_dev_cq_queue_setup(eth_dev,
+ config->max_virtqueue_pairs * 2,
+ SOCKET_ID_ANY);
+
+ PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
+ config->max_virtqueue_pairs);
+ PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
+ PMD_INIT_LOG(DEBUG,
+ "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
+ config->mac[0], config->mac[1],
+ config->mac[2], config->mac[3],
+ config->mac[4], config->mac[5]);
+ } else {
+ hw->max_rx_queues = 1;
+ hw->max_tx_queues = 1;
+ }
+
+ eth_dev->data->nb_rx_queues = hw->max_rx_queues;
+ eth_dev->data->nb_tx_queues = hw->max_tx_queues;
+
+ PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d hw->max_tx_queues=%d",
+ hw->max_rx_queues, hw->max_tx_queues);
+ PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
+ eth_dev->data->port_id, pci_dev->id.vendor_id,
+ pci_dev->id.device_id);
+
+ /* Setup interrupt callback */
+ if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+ rte_intr_callback_register(&pci_dev->intr_handle,
+ virtio_interrupt_handler, eth_dev);
+
+ virtio_dev_cq_start(eth_dev);
+
+ return 0;
+}
+
+static struct eth_driver rte_virtio_pmd = {
+ {
+ .name = "rte_virtio_pmd",
+ .id_table = pci_id_virtio_map,
+ },
+ .eth_dev_init = eth_virtio_dev_init,
+ .dev_private_size = sizeof(struct virtio_hw),
+};
+
+/*
+ * Driver initialization routine.
+ * Invoked once at EAL init time.
+ * Register itself as the [Poll Mode] Driver of PCI virtio devices.
+ * Returns 0 on success.
+ */
+static int
+rte_virtio_pmd_init(const char *name __rte_unused,
+ const char *param __rte_unused)
+{
+ if (rte_eal_iopl_init() != 0) {
+ PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
+ return -1;
+ }
+
+ rte_eth_driver_register(&rte_virtio_pmd);
+ return 0;
+}
+
+/*
+ * Only 1 queue is supported, no queue release related operation
+ */
+static void
+virtio_dev_rx_queue_release(__rte_unused void *rxq)
+{
+}
+
+static void
+virtio_dev_tx_queue_release(__rte_unused void *txq)
+{
+}
+
+/*
+ * Configure virtio device
+ * It returns 0 on success.
+ */
+static int
+virtio_dev_configure(struct rte_eth_dev *dev)
+{
+ const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct rte_pci_device *pci_dev = dev->pci_dev;
+
+ PMD_INIT_LOG(DEBUG, "configure");
+
+ if (rxmode->hw_ip_checksum) {
+ PMD_DRV_LOG(ERR, "HW IP checksum not supported");
+ return (-EINVAL);
+ }
+
+ hw->vlan_strip = rxmode->hw_vlan_strip;
+
+ if (rxmode->hw_vlan_filter
+ && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
+ PMD_DRV_LOG(NOTICE,
+ "vlan filtering not available on this host");
+ return -ENOTSUP;
+ }
+
+ if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+ if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
+ PMD_DRV_LOG(ERR, "failed to set config vector");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+
+static int
+virtio_dev_start(struct rte_eth_dev *dev)
+{
+ uint16_t nb_queues, i;
+ struct virtio_hw *hw = dev->data->dev_private;
+ struct rte_pci_device *pci_dev = dev->pci_dev;
+
+ /* check if lsc interrupt feature is enabled */
+ if ((dev->data->dev_conf.intr_conf.lsc) &&
+ (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
+ if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+ PMD_DRV_LOG(ERR, "link status not supported by host");
+ return -ENOTSUP;
+ }
+
+ if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
+ PMD_DRV_LOG(ERR, "interrupt enable failed");
+ return -EIO;
+ }
+ }
+
+ /* Initialize Link state */
+ virtio_dev_link_update(dev, 0);
+
+ /* On restart after stop do not touch queues */
+ if (hw->started)
+ return 0;
+
+ /* Do final configuration before rx/tx engine starts */
+ virtio_dev_rxtx_start(dev);
+ vtpci_reinit_complete(hw);
+
+ hw->started = 1;
+
+ /*Notify the backend
+ *Otherwise the tap backend might already stop its queue due to fullness.
+ *vhost backend will have no chance to be waked up
+ */
+ nb_queues = dev->data->nb_rx_queues;
+ if (nb_queues > 1) {
+ if (virtio_set_multiple_queues(dev, nb_queues) != 0)
+ return -EINVAL;
+ }
+
+ PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
+
+ for (i = 0; i < nb_queues; i++)
+ virtqueue_notify(dev->data->rx_queues[i]);
+
+ PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++)
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
+
+ for (i = 0; i < dev->data->nb_tx_queues; i++)
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
+
+ return 0;
+}
+
+static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
+{
+ struct rte_mbuf *buf;
+ int i, mbuf_num = 0;
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++) {
+ PMD_INIT_LOG(DEBUG,
+ "Before freeing rxq[%d] used and unused buf", i);
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
+
+ while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
+ dev->data->rx_queues[i])) != NULL) {
+ rte_pktmbuf_free(buf);
+ mbuf_num++;
+ }
+
+ PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
+ PMD_INIT_LOG(DEBUG,
+ "After freeing rxq[%d] used and unused buf", i);
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
+ }
+
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ PMD_INIT_LOG(DEBUG,
+ "Before freeing txq[%d] used and unused bufs",
+ i);
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
+
+ mbuf_num = 0;
+ while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
+ dev->data->tx_queues[i])) != NULL) {
+ rte_pktmbuf_free(buf);
+
+ mbuf_num++;
+ }
+
+ PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
+ PMD_INIT_LOG(DEBUG,
+ "After freeing txq[%d] used and unused buf", i);
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
+ }
+}
+
+/*
+ * Stop device: disable interrupt and mark link down
+ */
+static void
+virtio_dev_stop(struct rte_eth_dev *dev)
+{
+ struct rte_eth_link link;
+
+ PMD_INIT_LOG(DEBUG, "stop");
+
+ if (dev->data->dev_conf.intr_conf.lsc)
+ rte_intr_disable(&dev->pci_dev->intr_handle);
+
+ memset(&link, 0, sizeof(link));
+ virtio_dev_atomic_write_link_status(dev, &link);
+}
+
+static int
+virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
+{
+ struct rte_eth_link link, old;
+ uint16_t status;
+ struct virtio_hw *hw = dev->data->dev_private;
+ memset(&link, 0, sizeof(link));
+ virtio_dev_atomic_read_link_status(dev, &link);
+ old = link;
+ link.link_duplex = FULL_DUPLEX;
+ link.link_speed = SPEED_10G;
+
+ if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+ PMD_INIT_LOG(DEBUG, "Get link status from hw");
+ vtpci_read_dev_config(hw,
+ offsetof(struct virtio_net_config, status),
+ &status, sizeof(status));
+ if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
+ link.link_status = 0;
+ PMD_INIT_LOG(DEBUG, "Port %d is down",
+ dev->data->port_id);
+ } else {
+ link.link_status = 1;
+ PMD_INIT_LOG(DEBUG, "Port %d is up",
+ dev->data->port_id);
+ }
+ } else {
+ link.link_status = 1; /* Link up */
+ }
+ virtio_dev_atomic_write_link_status(dev, &link);
+
+ return (old.link_status == link.link_status) ? -1 : 0;
+}
+
+static void
+virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+
+ dev_info->driver_name = dev->driver->pci_drv.name;
+ dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
+ dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
+ dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
+ dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
+ dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
+ dev_info->default_txconf = (struct rte_eth_txconf) {
+ .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
+ };
+}
+
+/*
+ * It enables testpmd to collect per queue stats.
+ */
+static int
+virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
+__rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
+__rte_unused uint8_t is_rx)
+{
+ return 0;
+}
+
+static struct rte_driver rte_virtio_driver = {
+ .type = PMD_PDEV,
+ .init = rte_virtio_pmd_init,
+};
+
+PMD_REGISTER_DRIVER(rte_virtio_driver);
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VIRTIO_ETHDEV_H_
+#define _VIRTIO_ETHDEV_H_
+
+#include <stdint.h>
+
+#include "virtio_pci.h"
+
+#define SPEED_10 10
+#define SPEED_100 100
+#define SPEED_1000 1000
+#define SPEED_10G 10000
+#define HALF_DUPLEX 1
+#define FULL_DUPLEX 2
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE 4096
+#endif
+
+#define VIRTIO_MAX_RX_QUEUES 128
+#define VIRTIO_MAX_TX_QUEUES 128
+#define VIRTIO_MAX_MAC_ADDRS 64
+#define VIRTIO_MIN_RX_BUFSIZE 64
+#define VIRTIO_MAX_RX_PKTLEN 9728
+
+/* Features desired/implemented by this driver. */
+#define VTNET_FEATURES \
+ (VIRTIO_NET_F_MAC | \
+ VIRTIO_NET_F_STATUS | \
+ VIRTIO_NET_F_MQ | \
+ VIRTIO_NET_F_CTRL_MAC_ADDR | \
+ VIRTIO_NET_F_CTRL_VQ | \
+ VIRTIO_NET_F_CTRL_RX | \
+ VIRTIO_NET_F_CTRL_VLAN | \
+ VIRTIO_NET_F_CSUM | \
+ VIRTIO_NET_F_HOST_TSO4 | \
+ VIRTIO_NET_F_HOST_TSO6 | \
+ VIRTIO_NET_F_HOST_ECN | \
+ VIRTIO_NET_F_GUEST_CSUM | \
+ VIRTIO_NET_F_GUEST_TSO4 | \
+ VIRTIO_NET_F_GUEST_TSO6 | \
+ VIRTIO_NET_F_GUEST_ECN | \
+ VIRTIO_NET_F_MRG_RXBUF | \
+ VIRTIO_RING_F_INDIRECT_DESC)
+
+/*
+ * CQ function prototype
+ */
+void virtio_dev_cq_start(struct rte_eth_dev *dev);
+
+/*
+ * RX/TX function prototypes
+ */
+void virtio_dev_rxtx_start(struct rte_eth_dev *dev);
+
+int virtio_dev_queue_setup(struct rte_eth_dev *dev,
+ int queue_type,
+ uint16_t queue_idx,
+ uint16_t vtpci_queue_idx,
+ uint16_t nb_desc,
+ unsigned int socket_id,
+ struct virtqueue **pvq);
+
+int virtio_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
+ uint16_t nb_rx_desc, unsigned int socket_id,
+ const struct rte_eth_rxconf *rx_conf,
+ struct rte_mempool *mb_pool);
+
+int virtio_dev_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
+ uint16_t nb_tx_desc, unsigned int socket_id,
+ const struct rte_eth_txconf *tx_conf);
+
+uint16_t virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts);
+
+uint16_t virtio_recv_mergeable_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts);
+
+uint16_t virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
+ uint16_t nb_pkts);
+
+
+/*
+ * The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us
+ * frames larger than 1514 bytes. We do not yet support software LRO
+ * via tcp_lro_rx().
+ */
+#define VTNET_LRO_FEATURES (VIRTIO_NET_F_GUEST_TSO4 | \
+ VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN)
+
+
+#endif /* _VIRTIO_ETHDEV_H_ */
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VIRTIO_LOGS_H_
+#define _VIRTIO_LOGS_H_
+
+#include <rte_log.h>
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_INIT
+#define PMD_INIT_LOG(level, fmt, args...) \
+ RTE_LOG(level, PMD, "%s(): " fmt "\n", __func__, ## args)
+#define PMD_INIT_FUNC_TRACE() PMD_INIT_LOG(DEBUG, " >>")
+#else
+#define PMD_INIT_LOG(level, fmt, args...) do { } while(0)
+#define PMD_INIT_FUNC_TRACE() do { } while(0)
+#endif
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_RX
+#define PMD_RX_LOG(level, fmt, args...) \
+ RTE_LOG(level, PMD, "%s() rx: " fmt , __func__, ## args)
+#else
+#define PMD_RX_LOG(level, fmt, args...) do { } while(0)
+#endif
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_TX
+#define PMD_TX_LOG(level, fmt, args...) \
+ RTE_LOG(level, PMD, "%s() tx: " fmt , __func__, ## args)
+#else
+#define PMD_TX_LOG(level, fmt, args...) do { } while(0)
+#endif
+
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DRIVER
+#define PMD_DRV_LOG(level, fmt, args...) \
+ RTE_LOG(level, PMD, "%s(): " fmt , __func__, ## args)
+#else
+#define PMD_DRV_LOG(level, fmt, args...) do { } while(0)
+#endif
+
+#endif /* _VIRTIO_LOGS_H_ */
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <stdint.h>
+
+#include "virtio_pci.h"
+#include "virtio_logs.h"
+
+static uint8_t vtpci_get_status(struct virtio_hw *);
+
+void
+vtpci_read_dev_config(struct virtio_hw *hw, uint64_t offset,
+ void *dst, int length)
+{
+ uint64_t off;
+ uint8_t *d;
+ int size;
+
+ off = VIRTIO_PCI_CONFIG(hw) + offset;
+ for (d = dst; length > 0; d += size, off += size, length -= size) {
+ if (length >= 4) {
+ size = 4;
+ *(uint32_t *)d = VIRTIO_READ_REG_4(hw, off);
+ } else if (length >= 2) {
+ size = 2;
+ *(uint16_t *)d = VIRTIO_READ_REG_2(hw, off);
+ } else {
+ size = 1;
+ *d = VIRTIO_READ_REG_1(hw, off);
+ }
+ }
+}
+
+void
+vtpci_write_dev_config(struct virtio_hw *hw, uint64_t offset,
+ void *src, int length)
+{
+ uint64_t off;
+ uint8_t *s;
+ int size;
+
+ off = VIRTIO_PCI_CONFIG(hw) + offset;
+ for (s = src; length > 0; s += size, off += size, length -= size) {
+ if (length >= 4) {
+ size = 4;
+ VIRTIO_WRITE_REG_4(hw, off, *(uint32_t *)s);
+ } else if (length >= 2) {
+ size = 2;
+ VIRTIO_WRITE_REG_2(hw, off, *(uint16_t *)s);
+ } else {
+ size = 1;
+ VIRTIO_WRITE_REG_1(hw, off, *s);
+ }
+ }
+}
+
+uint32_t
+vtpci_negotiate_features(struct virtio_hw *hw, uint32_t host_features)
+{
+ uint32_t features;
+ /*
+ * Limit negotiated features to what the driver, virtqueue, and
+ * host all support.
+ */
+ features = host_features & hw->guest_features;
+
+ VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_GUEST_FEATURES, features);
+ return features;
+}
+
+
+void
+vtpci_reset(struct virtio_hw *hw)
+{
+ /*
+ * Setting the status to RESET sets the host device to
+ * the original, uninitialized state.
+ */
+ vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_RESET);
+ vtpci_get_status(hw);
+}
+
+void
+vtpci_reinit_complete(struct virtio_hw *hw)
+{
+ vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER_OK);
+}
+
+static uint8_t
+vtpci_get_status(struct virtio_hw *hw)
+{
+ return VIRTIO_READ_REG_1(hw, VIRTIO_PCI_STATUS);
+}
+
+void
+vtpci_set_status(struct virtio_hw *hw, uint8_t status)
+{
+ if (status != VIRTIO_CONFIG_STATUS_RESET)
+ status = (uint8_t)(status | vtpci_get_status(hw));
+
+ VIRTIO_WRITE_REG_1(hw, VIRTIO_PCI_STATUS, status);
+}
+
+uint8_t
+vtpci_isr(struct virtio_hw *hw)
+{
+
+ return VIRTIO_READ_REG_1(hw, VIRTIO_PCI_ISR);
+}
+
+
+/* Enable one vector (0) for Link State Intrerrupt */
+uint16_t
+vtpci_irq_config(struct virtio_hw *hw, uint16_t vec)
+{
+ VIRTIO_WRITE_REG_2(hw, VIRTIO_MSI_CONFIG_VECTOR, vec);
+ return VIRTIO_READ_REG_2(hw, VIRTIO_MSI_CONFIG_VECTOR);
+}
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VIRTIO_PCI_H_
+#define _VIRTIO_PCI_H_
+
+#include <stdint.h>
+
+#ifdef __FreeBSD__
+#include <sys/types.h>
+#include <machine/cpufunc.h>
+#else
+#include <sys/io.h>
+#endif
+
+#include <rte_ethdev.h>
+
+struct virtqueue;
+
+/* VirtIO PCI vendor/device ID. */
+#define VIRTIO_PCI_VENDORID 0x1AF4
+#define VIRTIO_PCI_DEVICEID_MIN 0x1000
+#define VIRTIO_PCI_DEVICEID_MAX 0x103F
+
+/* VirtIO ABI version, this must match exactly. */
+#define VIRTIO_PCI_ABI_VERSION 0
+
+/*
+ * VirtIO Header, located in BAR 0.
+ */
+#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/
+#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */
+#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */
+#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */
+#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */
+#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */
+#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */
+#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading
+ * also clears the register (8, RO) */
+/* Only if MSIX is enabled: */
+#define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */
+#define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications
+ (16, RW) */
+
+/* The bit of the ISR which indicates a device has an interrupt. */
+#define VIRTIO_PCI_ISR_INTR 0x1
+/* The bit of the ISR which indicates a device configuration change. */
+#define VIRTIO_PCI_ISR_CONFIG 0x2
+/* Vector value used to disable MSI for queue. */
+#define VIRTIO_MSI_NO_VECTOR 0xFFFF
+
+/* VirtIO device IDs. */
+#define VIRTIO_ID_NETWORK 0x01
+#define VIRTIO_ID_BLOCK 0x02
+#define VIRTIO_ID_CONSOLE 0x03
+#define VIRTIO_ID_ENTROPY 0x04
+#define VIRTIO_ID_BALLOON 0x05
+#define VIRTIO_ID_IOMEMORY 0x06
+#define VIRTIO_ID_9P 0x09
+
+/* Status byte for guest to report progress. */
+#define VIRTIO_CONFIG_STATUS_RESET 0x00
+#define VIRTIO_CONFIG_STATUS_ACK 0x01
+#define VIRTIO_CONFIG_STATUS_DRIVER 0x02
+#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
+#define VIRTIO_CONFIG_STATUS_FAILED 0x80
+
+/*
+ * Generate interrupt when the virtqueue ring is
+ * completely used, even if we've suppressed them.
+ */
+#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
+
+/*
+ * The guest should never negotiate this feature; it
+ * is used to detect faulty drivers.
+ */
+#define VIRTIO_F_BAD_FEATURE (1 << 30)
+
+/*
+ * Some VirtIO feature bits (currently bits 28 through 31) are
+ * reserved for the transport being used (eg. virtio_ring), the
+ * rest are per-device feature bits.
+ */
+#define VIRTIO_TRANSPORT_F_START 28
+#define VIRTIO_TRANSPORT_F_END 32
+
+/*
+ * Each virtqueue indirect descriptor list must be physically contiguous.
+ * To allow us to malloc(9) each list individually, limit the number
+ * supported to what will fit in one page. With 4KB pages, this is a limit
+ * of 256 descriptors. If there is ever a need for more, we can switch to
+ * contigmalloc(9) for the larger allocations, similar to what
+ * bus_dmamem_alloc(9) does.
+ *
+ * Note the sizeof(struct vring_desc) is 16 bytes.
+ */
+#define VIRTIO_MAX_INDIRECT ((int) (PAGE_SIZE / 16))
+
+/* The feature bitmap for virtio net */
+#define VIRTIO_NET_F_CSUM 0x00001 /* Host handles pkts w/ partial csum */
+#define VIRTIO_NET_F_GUEST_CSUM 0x00002 /* Guest handles pkts w/ partial csum*/
+#define VIRTIO_NET_F_MAC 0x00020 /* Host has given MAC address. */
+#define VIRTIO_NET_F_GSO 0x00040 /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_F_GUEST_TSO4 0x00080 /* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_F_GUEST_TSO6 0x00100 /* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_F_GUEST_ECN 0x00200 /* Guest can handle TSO[6] w/ ECN in.*/
+#define VIRTIO_NET_F_GUEST_UFO 0x00400 /* Guest can handle UFO in. */
+#define VIRTIO_NET_F_HOST_TSO4 0x00800 /* Host can handle TSOv4 in. */
+#define VIRTIO_NET_F_HOST_TSO6 0x01000 /* Host can handle TSOv6 in. */
+#define VIRTIO_NET_F_HOST_ECN 0x02000 /* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_HOST_UFO 0x04000 /* Host can handle UFO in. */
+#define VIRTIO_NET_F_MRG_RXBUF 0x08000 /* Host can merge receive buffers. */
+#define VIRTIO_NET_F_STATUS 0x10000 /* virtio_net_config.status available*/
+#define VIRTIO_NET_F_CTRL_VQ 0x20000 /* Control channel available */
+#define VIRTIO_NET_F_CTRL_RX 0x40000 /* Control channel RX mode support */
+#define VIRTIO_NET_F_CTRL_VLAN 0x80000 /* Control channel VLAN filtering */
+#define VIRTIO_NET_F_CTRL_RX_EXTRA 0x100000 /* Extra RX mode control support */
+#define VIRTIO_RING_F_INDIRECT_DESC 0x10000000 /* Support for indirect buffer descriptors. */
+/* The guest publishes the used index for which it expects an interrupt
+ * at the end of the avail ring. Host should ignore the avail->flags field.
+ * The host publishes the avail index for which it expects a kick
+ * at the end of the used ring. Guest should ignore the used->flags field.
+ */
+#define VIRTIO_RING_F_EVENT_IDX 0x20000000
+
+#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
+
+/*
+ * Maximum number of virtqueues per device.
+ */
+#define VIRTIO_MAX_VIRTQUEUES 8
+
+struct virtio_hw {
+ struct virtqueue *cvq;
+ uint32_t io_base;
+ uint32_t guest_features;
+ uint32_t max_tx_queues;
+ uint32_t max_rx_queues;
+ uint16_t vtnet_hdr_size;
+ uint8_t vlan_strip;
+ uint8_t use_msix;
+ uint8_t started;
+ uint8_t mac_addr[ETHER_ADDR_LEN];
+};
+
+/*
+ * This structure is just a reference to read
+ * net device specific config space; it just a chodu structure
+ *
+ */
+struct virtio_net_config {
+ /* The config defining mac address (if VIRTIO_NET_F_MAC) */
+ uint8_t mac[ETHER_ADDR_LEN];
+ /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
+ uint16_t status;
+ uint16_t max_virtqueue_pairs;
+} __attribute__((packed));
+
+/*
+ * The remaining space is defined by each driver as the per-driver
+ * configuration space.
+ */
+#define VIRTIO_PCI_CONFIG(hw) (((hw)->use_msix) ? 24 : 20)
+
+/*
+ * How many bits to shift physical queue address written to QUEUE_PFN.
+ * 12 is historical, and due to x86 page size.
+ */
+#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
+
+/* The alignment to use between consumer and producer parts of vring. */
+#define VIRTIO_PCI_VRING_ALIGN 4096
+
+#ifdef __FreeBSD__
+
+static inline void
+outb_p(unsigned char data, unsigned int port)
+{
+
+ outb(port, (u_char)data);
+}
+
+static inline void
+outw_p(unsigned short data, unsigned int port)
+{
+ outw(port, (u_short)data);
+}
+
+static inline void
+outl_p(unsigned int data, unsigned int port)
+{
+ outl(port, (u_int)data);
+}
+#endif
+
+#define VIRTIO_PCI_REG_ADDR(hw, reg) \
+ (unsigned short)((hw)->io_base + (reg))
+
+#define VIRTIO_READ_REG_1(hw, reg) \
+ inb((VIRTIO_PCI_REG_ADDR((hw), (reg))))
+#define VIRTIO_WRITE_REG_1(hw, reg, value) \
+ outb_p((unsigned char)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
+
+#define VIRTIO_READ_REG_2(hw, reg) \
+ inw((VIRTIO_PCI_REG_ADDR((hw), (reg))))
+#define VIRTIO_WRITE_REG_2(hw, reg, value) \
+ outw_p((unsigned short)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
+
+#define VIRTIO_READ_REG_4(hw, reg) \
+ inl((VIRTIO_PCI_REG_ADDR((hw), (reg))))
+#define VIRTIO_WRITE_REG_4(hw, reg, value) \
+ outl_p((unsigned int)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
+
+static inline int
+vtpci_with_feature(struct virtio_hw *hw, uint32_t feature)
+{
+ return (hw->guest_features & feature) != 0;
+}
+
+/*
+ * Function declaration from virtio_pci.c
+ */
+void vtpci_reset(struct virtio_hw *);
+
+void vtpci_reinit_complete(struct virtio_hw *);
+
+void vtpci_set_status(struct virtio_hw *, uint8_t);
+
+uint32_t vtpci_negotiate_features(struct virtio_hw *, uint32_t);
+
+void vtpci_write_dev_config(struct virtio_hw *, uint64_t, void *, int);
+
+void vtpci_read_dev_config(struct virtio_hw *, uint64_t, void *, int);
+
+uint8_t vtpci_isr(struct virtio_hw *);
+
+uint16_t vtpci_irq_config(struct virtio_hw *, uint16_t);
+
+#endif /* _VIRTIO_PCI_H_ */
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VIRTIO_RING_H_
+#define _VIRTIO_RING_H_
+
+#include <stdint.h>
+
+#include <rte_common.h>
+
+/* This marks a buffer as continuing via the next field. */
+#define VRING_DESC_F_NEXT 1
+/* This marks a buffer as write-only (otherwise read-only). */
+#define VRING_DESC_F_WRITE 2
+/* This means the buffer contains a list of buffer descriptors. */
+#define VRING_DESC_F_INDIRECT 4
+
+/* The Host uses this in used->flags to advise the Guest: don't kick me
+ * when you add a buffer. It's unreliable, so it's simply an
+ * optimization. Guest will still kick if it's out of buffers. */
+#define VRING_USED_F_NO_NOTIFY 1
+/* The Guest uses this in avail->flags to advise the Host: don't
+ * interrupt me when you consume a buffer. It's unreliable, so it's
+ * simply an optimization. */
+#define VRING_AVAIL_F_NO_INTERRUPT 1
+
+/* VirtIO ring descriptors: 16 bytes.
+ * These can chain together via "next". */
+struct vring_desc {
+ uint64_t addr; /* Address (guest-physical). */
+ uint32_t len; /* Length. */
+ uint16_t flags; /* The flags as indicated above. */
+ uint16_t next; /* We chain unused descriptors via this. */
+};
+
+struct vring_avail {
+ uint16_t flags;
+ uint16_t idx;
+ uint16_t ring[0];
+};
+
+/* id is a 16bit index. uint32_t is used here for ids for padding reasons. */
+struct vring_used_elem {
+ /* Index of start of used descriptor chain. */
+ uint32_t id;
+ /* Total length of the descriptor chain which was written to. */
+ uint32_t len;
+};
+
+struct vring_used {
+ uint16_t flags;
+ uint16_t idx;
+ struct vring_used_elem ring[0];
+};
+
+struct vring {
+ unsigned int num;
+ struct vring_desc *desc;
+ struct vring_avail *avail;
+ struct vring_used *used;
+};
+
+/* The standard layout for the ring is a continuous chunk of memory which
+ * looks like this. We assume num is a power of 2.
+ *
+ * struct vring {
+ * // The actual descriptors (16 bytes each)
+ * struct vring_desc desc[num];
+ *
+ * // A ring of available descriptor heads with free-running index.
+ * __u16 avail_flags;
+ * __u16 avail_idx;
+ * __u16 available[num];
+ * __u16 used_event_idx;
+ *
+ * // Padding to the next align boundary.
+ * char pad[];
+ *
+ * // A ring of used descriptor heads with free-running index.
+ * __u16 used_flags;
+ * __u16 used_idx;
+ * struct vring_used_elem used[num];
+ * __u16 avail_event_idx;
+ * };
+ *
+ * NOTE: for VirtIO PCI, align is 4096.
+ */
+
+/*
+ * We publish the used event index at the end of the available ring, and vice
+ * versa. They are at the end for backwards compatibility.
+ */
+#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
+#define vring_avail_event(vr) (*(uint16_t *)&(vr)->used->ring[(vr)->num])
+
+static inline int
+vring_size(unsigned int num, unsigned long align)
+{
+ int size;
+
+ size = num * sizeof(struct vring_desc);
+ size += sizeof(struct vring_avail) + (num * sizeof(uint16_t));
+ size = RTE_ALIGN_CEIL(size, align);
+ size += sizeof(struct vring_used) +
+ (num * sizeof(struct vring_used_elem));
+ return size;
+}
+
+static inline void
+vring_init(struct vring *vr, unsigned int num, uint8_t *p,
+ unsigned long align)
+{
+ vr->num = num;
+ vr->desc = (struct vring_desc *) p;
+ vr->avail = (struct vring_avail *) (p +
+ num * sizeof(struct vring_desc));
+ vr->used = (void *)
+ RTE_ALIGN_CEIL((uintptr_t)(&vr->avail->ring[num]), align);
+}
+
+/*
+ * The following is used with VIRTIO_RING_F_EVENT_IDX.
+ * Assuming a given event_idx value from the other size, if we have
+ * just incremented index from old to new_idx, should we trigger an
+ * event?
+ */
+static inline int
+vring_need_event(uint16_t event_idx, uint16_t new_idx, uint16_t old)
+{
+ return (uint16_t)(new_idx - event_idx - 1) < (uint16_t)(new_idx - old);
+}
+
+#endif /* _VIRTIO_RING_H_ */
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <rte_cycles.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_branch_prediction.h>
+#include <rte_mempool.h>
+#include <rte_malloc.h>
+#include <rte_mbuf.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_prefetch.h>
+#include <rte_string_fns.h>
+#include <rte_errno.h>
+#include <rte_byteorder.h>
+
+#include "virtio_logs.h"
+#include "virtio_ethdev.h"
+#include "virtqueue.h"
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
+#define VIRTIO_DUMP_PACKET(m, len) rte_pktmbuf_dump(stdout, m, len)
+#else
+#define VIRTIO_DUMP_PACKET(m, len) do { } while (0)
+#endif
+
+static void
+vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
+{
+ struct vring_desc *dp, *dp_tail;
+ struct vq_desc_extra *dxp;
+ uint16_t desc_idx_last = desc_idx;
+
+ dp = &vq->vq_ring.desc[desc_idx];
+ dxp = &vq->vq_descx[desc_idx];
+ vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs);
+ if ((dp->flags & VRING_DESC_F_INDIRECT) == 0) {
+ while (dp->flags & VRING_DESC_F_NEXT) {
+ desc_idx_last = dp->next;
+ dp = &vq->vq_ring.desc[dp->next];
+ }
+ }
+ dxp->ndescs = 0;
+
+ /*
+ * We must append the existing free chain, if any, to the end of
+ * newly freed chain. If the virtqueue was completely used, then
+ * head would be VQ_RING_DESC_CHAIN_END (ASSERTed above).
+ */
+ if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END) {
+ vq->vq_desc_head_idx = desc_idx;
+ } else {
+ dp_tail = &vq->vq_ring.desc[vq->vq_desc_tail_idx];
+ dp_tail->next = desc_idx;
+ }
+
+ vq->vq_desc_tail_idx = desc_idx_last;
+ dp->next = VQ_RING_DESC_CHAIN_END;
+}
+
+static uint16_t
+virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts,
+ uint32_t *len, uint16_t num)
+{
+ struct vring_used_elem *uep;
+ struct rte_mbuf *cookie;
+ uint16_t used_idx, desc_idx;
+ uint16_t i;
+
+ /* Caller does the check */
+ for (i = 0; i < num ; i++) {
+ used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
+ uep = &vq->vq_ring.used->ring[used_idx];
+ desc_idx = (uint16_t) uep->id;
+ len[i] = uep->len;
+ cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie;
+
+ if (unlikely(cookie == NULL)) {
+ PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u\n",
+ vq->vq_used_cons_idx);
+ break;
+ }
+
+ rte_prefetch0(cookie);
+ rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
+ rx_pkts[i] = cookie;
+ vq->vq_used_cons_idx++;
+ vq_ring_free_chain(vq, desc_idx);
+ vq->vq_descx[desc_idx].cookie = NULL;
+ }
+
+ return i;
+}
+
+#ifndef DEFAULT_TX_FREE_THRESH
+#define DEFAULT_TX_FREE_THRESH 32
+#endif
+
+/* Cleanup from completed transmits. */
+static void
+virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
+{
+ uint16_t i, used_idx, desc_idx;
+ for (i = 0; i < num; i++) {
+ struct vring_used_elem *uep;
+ struct vq_desc_extra *dxp;
+
+ used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
+ uep = &vq->vq_ring.used->ring[used_idx];
+
+ desc_idx = (uint16_t) uep->id;
+ dxp = &vq->vq_descx[desc_idx];
+ vq->vq_used_cons_idx++;
+ vq_ring_free_chain(vq, desc_idx);
+
+ if (dxp->cookie != NULL) {
+ rte_pktmbuf_free(dxp->cookie);
+ dxp->cookie = NULL;
+ }
+ }
+}
+
+
+static inline int
+virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf *cookie)
+{
+ struct vq_desc_extra *dxp;
+ struct virtio_hw *hw = vq->hw;
+ struct vring_desc *start_dp;
+ uint16_t needed = 1;
+ uint16_t head_idx, idx;
+
+ if (unlikely(vq->vq_free_cnt == 0))
+ return -ENOSPC;
+ if (unlikely(vq->vq_free_cnt < needed))
+ return -EMSGSIZE;
+
+ head_idx = vq->vq_desc_head_idx;
+ if (unlikely(head_idx >= vq->vq_nentries))
+ return -EFAULT;
+
+ idx = head_idx;
+ dxp = &vq->vq_descx[idx];
+ dxp->cookie = (void *)cookie;
+ dxp->ndescs = needed;
+
+ start_dp = vq->vq_ring.desc;
+ start_dp[idx].addr =
+ (uint64_t)(cookie->buf_physaddr + RTE_PKTMBUF_HEADROOM
+ - hw->vtnet_hdr_size);
+ start_dp[idx].len =
+ cookie->buf_len - RTE_PKTMBUF_HEADROOM + hw->vtnet_hdr_size;
+ start_dp[idx].flags = VRING_DESC_F_WRITE;
+ idx = start_dp[idx].next;
+ vq->vq_desc_head_idx = idx;
+ if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
+ vq->vq_desc_tail_idx = idx;
+ vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
+ vq_update_avail_ring(vq, head_idx);
+
+ return 0;
+}
+
+static int
+virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
+{
+ struct vq_desc_extra *dxp;
+ struct vring_desc *start_dp;
+ uint16_t seg_num = cookie->nb_segs;
+ uint16_t needed = 1 + seg_num;
+ uint16_t head_idx, idx;
+ uint16_t head_size = txvq->hw->vtnet_hdr_size;
+
+ if (unlikely(txvq->vq_free_cnt == 0))
+ return -ENOSPC;
+ if (unlikely(txvq->vq_free_cnt < needed))
+ return -EMSGSIZE;
+ head_idx = txvq->vq_desc_head_idx;
+ if (unlikely(head_idx >= txvq->vq_nentries))
+ return -EFAULT;
+
+ idx = head_idx;
+ dxp = &txvq->vq_descx[idx];
+ dxp->cookie = (void *)cookie;
+ dxp->ndescs = needed;
+
+ start_dp = txvq->vq_ring.desc;
+ start_dp[idx].addr =
+ txvq->virtio_net_hdr_mem + idx * head_size;
+ start_dp[idx].len = (uint32_t)head_size;
+ start_dp[idx].flags = VRING_DESC_F_NEXT;
+
+ for (; ((seg_num > 0) && (cookie != NULL)); seg_num--) {
+ idx = start_dp[idx].next;
+ start_dp[idx].addr = RTE_MBUF_DATA_DMA_ADDR(cookie);
+ start_dp[idx].len = cookie->data_len;
+ start_dp[idx].flags = VRING_DESC_F_NEXT;
+ cookie = cookie->next;
+ }
+
+ start_dp[idx].flags &= ~VRING_DESC_F_NEXT;
+ idx = start_dp[idx].next;
+ txvq->vq_desc_head_idx = idx;
+ if (txvq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
+ txvq->vq_desc_tail_idx = idx;
+ txvq->vq_free_cnt = (uint16_t)(txvq->vq_free_cnt - needed);
+ vq_update_avail_ring(txvq, head_idx);
+
+ return 0;
+}
+
+static inline struct rte_mbuf *
+rte_rxmbuf_alloc(struct rte_mempool *mp)
+{
+ struct rte_mbuf *m;
+
+ m = __rte_mbuf_raw_alloc(mp);
+ __rte_mbuf_sanity_check_raw(m, 0);
+
+ return m;
+}
+
+static void
+virtio_dev_vring_start(struct virtqueue *vq, int queue_type)
+{
+ struct rte_mbuf *m;
+ int i, nbufs, error, size = vq->vq_nentries;
+ struct vring *vr = &vq->vq_ring;
+ uint8_t *ring_mem = vq->vq_ring_virt_mem;
+
+ PMD_INIT_FUNC_TRACE();
+
+ /*
+ * Reinitialise since virtio port might have been stopped and restarted
+ */
+ memset(vq->vq_ring_virt_mem, 0, vq->vq_ring_size);
+ vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
+ vq->vq_used_cons_idx = 0;
+ vq->vq_desc_head_idx = 0;
+ vq->vq_avail_idx = 0;
+ vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
+ vq->vq_free_cnt = vq->vq_nentries;
+ memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
+
+ /* Chain all the descriptors in the ring with an END */
+ for (i = 0; i < size - 1; i++)
+ vr->desc[i].next = (uint16_t)(i + 1);
+ vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
+
+ /*
+ * Disable device(host) interrupting guest
+ */
+ virtqueue_disable_intr(vq);
+
+ /* Only rx virtqueue needs mbufs to be allocated at initialization */
+ if (queue_type == VTNET_RQ) {
+ if (vq->mpool == NULL)
+ rte_exit(EXIT_FAILURE,
+ "Cannot allocate initial mbufs for rx virtqueue");
+
+ /* Allocate blank mbufs for the each rx descriptor */
+ nbufs = 0;
+ error = ENOSPC;
+ while (!virtqueue_full(vq)) {
+ m = rte_rxmbuf_alloc(vq->mpool);
+ if (m == NULL)
+ break;
+
+ /******************************************
+ * Enqueue allocated buffers *
+ *******************************************/
+ error = virtqueue_enqueue_recv_refill(vq, m);
+
+ if (error) {
+ rte_pktmbuf_free(m);
+ break;
+ }
+ nbufs++;
+ }
+
+ vq_update_avail_idx(vq);
+
+ PMD_INIT_LOG(DEBUG, "Allocated %d bufs", nbufs);
+
+ VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_SEL,
+ vq->vq_queue_index);
+ VIRTIO_WRITE_REG_4(vq->hw, VIRTIO_PCI_QUEUE_PFN,
+ vq->mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
+ } else if (queue_type == VTNET_TQ) {
+ VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_SEL,
+ vq->vq_queue_index);
+ VIRTIO_WRITE_REG_4(vq->hw, VIRTIO_PCI_QUEUE_PFN,
+ vq->mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
+ } else {
+ VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_SEL,
+ vq->vq_queue_index);
+ VIRTIO_WRITE_REG_4(vq->hw, VIRTIO_PCI_QUEUE_PFN,
+ vq->mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
+ }
+}
+
+void
+virtio_dev_cq_start(struct rte_eth_dev *dev)
+{
+ struct virtio_hw *hw = dev->data->dev_private;
+
+ if (hw->cvq) {
+ virtio_dev_vring_start(hw->cvq, VTNET_CQ);
+ VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq);
+ }
+}
+
+void
+virtio_dev_rxtx_start(struct rte_eth_dev *dev)
+{
+ /*
+ * Start receive and transmit vrings
+ * - Setup vring structure for all queues
+ * - Initialize descriptor for the rx vring
+ * - Allocate blank mbufs for the each rx descriptor
+ *
+ */
+ int i;
+
+ PMD_INIT_FUNC_TRACE();
+
+ /* Start rx vring. */
+ for (i = 0; i < dev->data->nb_rx_queues; i++) {
+ virtio_dev_vring_start(dev->data->rx_queues[i], VTNET_RQ);
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
+ }
+
+ /* Start tx vring. */
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ virtio_dev_vring_start(dev->data->tx_queues[i], VTNET_TQ);
+ VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
+ }
+}
+
+int
+virtio_dev_rx_queue_setup(struct rte_eth_dev *dev,
+ uint16_t queue_idx,
+ uint16_t nb_desc,
+ unsigned int socket_id,
+ __rte_unused const struct rte_eth_rxconf *rx_conf,
+ struct rte_mempool *mp)
+{
+ uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX;
+ struct virtqueue *vq;
+ int ret;
+
+ PMD_INIT_FUNC_TRACE();
+ ret = virtio_dev_queue_setup(dev, VTNET_RQ, queue_idx, vtpci_queue_idx,
+ nb_desc, socket_id, &vq);
+ if (ret < 0) {
+ PMD_INIT_LOG(ERR, "tvq initialization failed");
+ return ret;
+ }
+
+ /* Create mempool for rx mbuf allocation */
+ vq->mpool = mp;
+
+ dev->data->rx_queues[queue_idx] = vq;
+ return 0;
+}
+
+/*
+ * struct rte_eth_dev *dev: Used to update dev
+ * uint16_t nb_desc: Defaults to values read from config space
+ * unsigned int socket_id: Used to allocate memzone
+ * const struct rte_eth_txconf *tx_conf: Used to setup tx engine
+ * uint16_t queue_idx: Just used as an index in dev txq list
+ */
+int
+virtio_dev_tx_queue_setup(struct rte_eth_dev *dev,
+ uint16_t queue_idx,
+ uint16_t nb_desc,
+ unsigned int socket_id,
+ const struct rte_eth_txconf *tx_conf)
+{
+ uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX;
+ struct virtqueue *vq;
+ uint16_t tx_free_thresh;
+ int ret;
+
+ PMD_INIT_FUNC_TRACE();
+
+ if ((tx_conf->txq_flags & ETH_TXQ_FLAGS_NOXSUMS)
+ != ETH_TXQ_FLAGS_NOXSUMS) {
+ PMD_INIT_LOG(ERR, "TX checksum offload not supported\n");
+ return -EINVAL;
+ }
+
+ ret = virtio_dev_queue_setup(dev, VTNET_TQ, queue_idx, vtpci_queue_idx,
+ nb_desc, socket_id, &vq);
+ if (ret < 0) {
+ PMD_INIT_LOG(ERR, "rvq initialization failed");
+ return ret;
+ }
+
+ tx_free_thresh = tx_conf->tx_free_thresh;
+ if (tx_free_thresh == 0)
+ tx_free_thresh =
+ RTE_MIN(vq->vq_nentries / 4, DEFAULT_TX_FREE_THRESH);
+
+ if (tx_free_thresh >= (vq->vq_nentries - 3)) {
+ RTE_LOG(ERR, PMD, "tx_free_thresh must be less than the "
+ "number of TX entries minus 3 (%u)."
+ " (tx_free_thresh=%u port=%u queue=%u)\n",
+ vq->vq_nentries - 3,
+ tx_free_thresh, dev->data->port_id, queue_idx);
+ return -EINVAL;
+ }
+
+ vq->vq_free_thresh = tx_free_thresh;
+
+ dev->data->tx_queues[queue_idx] = vq;
+ return 0;
+}
+
+static void
+virtio_discard_rxbuf(struct virtqueue *vq, struct rte_mbuf *m)
+{
+ int error;
+ /*
+ * Requeue the discarded mbuf. This should always be
+ * successful since it was just dequeued.
+ */
+ error = virtqueue_enqueue_recv_refill(vq, m);
+ if (unlikely(error)) {
+ RTE_LOG(ERR, PMD, "cannot requeue discarded mbuf");
+ rte_pktmbuf_free(m);
+ }
+}
+
+#define VIRTIO_MBUF_BURST_SZ 64
+#define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc))
+uint16_t
+virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+ struct virtqueue *rxvq = rx_queue;
+ struct virtio_hw *hw;
+ struct rte_mbuf *rxm, *new_mbuf;
+ uint16_t nb_used, num, nb_rx;
+ uint32_t len[VIRTIO_MBUF_BURST_SZ];
+ struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
+ int error;
+ uint32_t i, nb_enqueued;
+ const uint32_t hdr_size = sizeof(struct virtio_net_hdr);
+
+ nb_used = VIRTQUEUE_NUSED(rxvq);
+
+ virtio_rmb();
+
+ num = (uint16_t)(likely(nb_used <= nb_pkts) ? nb_used : nb_pkts);
+ num = (uint16_t)(likely(num <= VIRTIO_MBUF_BURST_SZ) ? num : VIRTIO_MBUF_BURST_SZ);
+ if (likely(num > DESC_PER_CACHELINE))
+ num = num - ((rxvq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
+
+ if (num == 0)
+ return 0;
+
+ num = virtqueue_dequeue_burst_rx(rxvq, rcv_pkts, len, num);
+ PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num);
+
+ hw = rxvq->hw;
+ nb_rx = 0;
+ nb_enqueued = 0;
+
+ for (i = 0; i < num ; i++) {
+ rxm = rcv_pkts[i];
+
+ PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
+
+ if (unlikely(len[i] < hdr_size + ETHER_HDR_LEN)) {
+ PMD_RX_LOG(ERR, "Packet drop");
+ nb_enqueued++;
+ virtio_discard_rxbuf(rxvq, rxm);
+ rxvq->errors++;
+ continue;
+ }
+
+ rxm->port = rxvq->port_id;
+ rxm->data_off = RTE_PKTMBUF_HEADROOM;
+
+ rxm->nb_segs = 1;
+ rxm->next = NULL;
+ rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
+ rxm->data_len = (uint16_t)(len[i] - hdr_size);
+
+ if (hw->vlan_strip)
+ rte_vlan_strip(rxm);
+
+ VIRTIO_DUMP_PACKET(rxm, rxm->data_len);
+
+ rx_pkts[nb_rx++] = rxm;
+ rxvq->bytes += rx_pkts[nb_rx - 1]->pkt_len;
+ }
+
+ rxvq->packets += nb_rx;
+
+ /* Allocate new mbuf for the used descriptor */
+ error = ENOSPC;
+ while (likely(!virtqueue_full(rxvq))) {
+ new_mbuf = rte_rxmbuf_alloc(rxvq->mpool);
+ if (unlikely(new_mbuf == NULL)) {
+ struct rte_eth_dev *dev
+ = &rte_eth_devices[rxvq->port_id];
+ dev->data->rx_mbuf_alloc_failed++;
+ break;
+ }
+ error = virtqueue_enqueue_recv_refill(rxvq, new_mbuf);
+ if (unlikely(error)) {
+ rte_pktmbuf_free(new_mbuf);
+ break;
+ }
+ nb_enqueued++;
+ }
+
+ if (likely(nb_enqueued)) {
+ vq_update_avail_idx(rxvq);
+
+ if (unlikely(virtqueue_kick_prepare(rxvq))) {
+ virtqueue_notify(rxvq);
+ PMD_RX_LOG(DEBUG, "Notified\n");
+ }
+ }
+
+ return nb_rx;
+}
+
+uint16_t
+virtio_recv_mergeable_pkts(void *rx_queue,
+ struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct virtqueue *rxvq = rx_queue;
+ struct virtio_hw *hw;
+ struct rte_mbuf *rxm, *new_mbuf;
+ uint16_t nb_used, num, nb_rx;
+ uint32_t len[VIRTIO_MBUF_BURST_SZ];
+ struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
+ struct rte_mbuf *prev;
+ int error;
+ uint32_t i, nb_enqueued;
+ uint32_t seg_num;
+ uint16_t extra_idx;
+ uint32_t seg_res;
+ const uint32_t hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
+
+ nb_used = VIRTQUEUE_NUSED(rxvq);
+
+ virtio_rmb();
+
+ if (nb_used == 0)
+ return 0;
+
+ PMD_RX_LOG(DEBUG, "used:%d\n", nb_used);
+
+ hw = rxvq->hw;
+ nb_rx = 0;
+ i = 0;
+ nb_enqueued = 0;
+ seg_num = 0;
+ extra_idx = 0;
+ seg_res = 0;
+
+ while (i < nb_used) {
+ struct virtio_net_hdr_mrg_rxbuf *header;
+
+ if (nb_rx == nb_pkts)
+ break;
+
+ num = virtqueue_dequeue_burst_rx(rxvq, rcv_pkts, len, 1);
+ if (num != 1)
+ continue;
+
+ i++;
+
+ PMD_RX_LOG(DEBUG, "dequeue:%d\n", num);
+ PMD_RX_LOG(DEBUG, "packet len:%d\n", len[0]);
+
+ rxm = rcv_pkts[0];
+
+ if (unlikely(len[0] < hdr_size + ETHER_HDR_LEN)) {
+ PMD_RX_LOG(ERR, "Packet drop\n");
+ nb_enqueued++;
+ virtio_discard_rxbuf(rxvq, rxm);
+ rxvq->errors++;
+ continue;
+ }
+
+ header = (struct virtio_net_hdr_mrg_rxbuf *)((char *)rxm->buf_addr +
+ RTE_PKTMBUF_HEADROOM - hdr_size);
+ seg_num = header->num_buffers;
+
+ if (seg_num == 0)
+ seg_num = 1;
+
+ rxm->data_off = RTE_PKTMBUF_HEADROOM;
+ rxm->nb_segs = seg_num;
+ rxm->next = NULL;
+ rxm->pkt_len = (uint32_t)(len[0] - hdr_size);
+ rxm->data_len = (uint16_t)(len[0] - hdr_size);
+
+ rxm->port = rxvq->port_id;
+ rx_pkts[nb_rx] = rxm;
+ prev = rxm;
+
+ seg_res = seg_num - 1;
+
+ while (seg_res != 0) {
+ /*
+ * Get extra segments for current uncompleted packet.
+ */
+ uint16_t rcv_cnt =
+ RTE_MIN(seg_res, RTE_DIM(rcv_pkts));
+ if (likely(VIRTQUEUE_NUSED(rxvq) >= rcv_cnt)) {
+ uint32_t rx_num =
+ virtqueue_dequeue_burst_rx(rxvq,
+ rcv_pkts, len, rcv_cnt);
+ i += rx_num;
+ rcv_cnt = rx_num;
+ } else {
+ PMD_RX_LOG(ERR,
+ "No enough segments for packet.\n");
+ nb_enqueued++;
+ virtio_discard_rxbuf(rxvq, rxm);
+ rxvq->errors++;
+ break;
+ }
+
+ extra_idx = 0;
+
+ while (extra_idx < rcv_cnt) {
+ rxm = rcv_pkts[extra_idx];
+
+ rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
+ rxm->next = NULL;
+ rxm->pkt_len = (uint32_t)(len[extra_idx]);
+ rxm->data_len = (uint16_t)(len[extra_idx]);
+
+ if (prev)
+ prev->next = rxm;
+
+ prev = rxm;
+ rx_pkts[nb_rx]->pkt_len += rxm->pkt_len;
+ extra_idx++;
+ };
+ seg_res -= rcv_cnt;
+ }
+
+ if (hw->vlan_strip)
+ rte_vlan_strip(rx_pkts[nb_rx]);
+
+ VIRTIO_DUMP_PACKET(rx_pkts[nb_rx],
+ rx_pkts[nb_rx]->data_len);
+
+ rxvq->bytes += rx_pkts[nb_rx]->pkt_len;
+ nb_rx++;
+ }
+
+ rxvq->packets += nb_rx;
+
+ /* Allocate new mbuf for the used descriptor */
+ error = ENOSPC;
+ while (likely(!virtqueue_full(rxvq))) {
+ new_mbuf = rte_rxmbuf_alloc(rxvq->mpool);
+ if (unlikely(new_mbuf == NULL)) {
+ struct rte_eth_dev *dev
+ = &rte_eth_devices[rxvq->port_id];
+ dev->data->rx_mbuf_alloc_failed++;
+ break;
+ }
+ error = virtqueue_enqueue_recv_refill(rxvq, new_mbuf);
+ if (unlikely(error)) {
+ rte_pktmbuf_free(new_mbuf);
+ break;
+ }
+ nb_enqueued++;
+ }
+
+ if (likely(nb_enqueued)) {
+ vq_update_avail_idx(rxvq);
+
+ if (unlikely(virtqueue_kick_prepare(rxvq))) {
+ virtqueue_notify(rxvq);
+ PMD_RX_LOG(DEBUG, "Notified");
+ }
+ }
+
+ return nb_rx;
+}
+
+uint16_t
+virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+ struct virtqueue *txvq = tx_queue;
+ struct rte_mbuf *txm;
+ uint16_t nb_used, nb_tx;
+ int error;
+
+ if (unlikely(nb_pkts < 1))
+ return nb_pkts;
+
+ PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
+ nb_used = VIRTQUEUE_NUSED(txvq);
+
+ virtio_rmb();
+ if (likely(nb_used > txvq->vq_free_thresh))
+ virtio_xmit_cleanup(txvq, nb_used);
+
+ nb_tx = 0;
+
+ while (nb_tx < nb_pkts) {
+ /* Need one more descriptor for virtio header. */
+ int need = tx_pkts[nb_tx]->nb_segs - txvq->vq_free_cnt + 1;
+
+ /*Positive value indicates it need free vring descriptors */
+ if (unlikely(need > 0)) {
+ nb_used = VIRTQUEUE_NUSED(txvq);
+ virtio_rmb();
+ need = RTE_MIN(need, (int)nb_used);
+
+ virtio_xmit_cleanup(txvq, need);
+ need = (int)tx_pkts[nb_tx]->nb_segs -
+ txvq->vq_free_cnt + 1;
+ }
+
+ /*
+ * Zero or negative value indicates it has enough free
+ * descriptors to use for transmitting.
+ */
+ if (likely(need <= 0)) {
+ txm = tx_pkts[nb_tx];
+
+ /* Do VLAN tag insertion */
+ if (unlikely(txm->ol_flags & PKT_TX_VLAN_PKT)) {
+ error = rte_vlan_insert(&txm);
+ if (unlikely(error)) {
+ rte_pktmbuf_free(txm);
+ ++nb_tx;
+ continue;
+ }
+ }
+
+ /* Enqueue Packet buffers */
+ error = virtqueue_enqueue_xmit(txvq, txm);
+ if (unlikely(error)) {
+ if (error == ENOSPC)
+ PMD_TX_LOG(ERR, "virtqueue_enqueue Free count = 0");
+ else if (error == EMSGSIZE)
+ PMD_TX_LOG(ERR, "virtqueue_enqueue Free count < 1");
+ else
+ PMD_TX_LOG(ERR, "virtqueue_enqueue error: %d", error);
+ break;
+ }
+ nb_tx++;
+ txvq->bytes += txm->pkt_len;
+ } else {
+ PMD_TX_LOG(ERR, "No free tx descriptors to transmit");
+ break;
+ }
+ }
+
+ txvq->packets += nb_tx;
+
+ if (likely(nb_tx)) {
+ vq_update_avail_idx(txvq);
+
+ if (unlikely(virtqueue_kick_prepare(txvq))) {
+ virtqueue_notify(txvq);
+ PMD_TX_LOG(DEBUG, "Notified backend after xmit");
+ }
+ }
+
+ return nb_tx;
+}
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <stdint.h>
+
+#include <rte_mbuf.h>
+
+#include "virtqueue.h"
+#include "virtio_logs.h"
+#include "virtio_pci.h"
+
+void
+virtqueue_disable_intr(struct virtqueue *vq)
+{
+ /*
+ * Set VRING_AVAIL_F_NO_INTERRUPT to hint host
+ * not to interrupt when it consumes packets
+ * Note: this is only considered a hint to the host
+ */
+ vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
+}
+
+/*
+ * Two types of mbuf to be cleaned:
+ * 1) mbuf that has been consumed by backend but not used by virtio.
+ * 2) mbuf that hasn't been consued by backend.
+ */
+struct rte_mbuf *
+virtqueue_detatch_unused(struct virtqueue *vq)
+{
+ struct rte_mbuf *cookie;
+ int idx;
+
+ for (idx = 0; idx < vq->vq_nentries; idx++) {
+ if ((cookie = vq->vq_descx[idx].cookie) != NULL) {
+ vq->vq_descx[idx].cookie = NULL;
+ return cookie;
+ }
+ }
+ return NULL;
+}
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VIRTQUEUE_H_
+#define _VIRTQUEUE_H_
+
+#include <stdint.h>
+
+#include <rte_atomic.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_mempool.h>
+
+#include "virtio_pci.h"
+#include "virtio_ring.h"
+#include "virtio_logs.h"
+
+struct rte_mbuf;
+
+/*
+ * Per virtio_config.h in Linux.
+ * For virtio_pci on SMP, we don't need to order with respect to MMIO
+ * accesses through relaxed memory I/O windows, so smp_mb() et al are
+ * sufficient.
+ *
+ * This driver is for virtio_pci on SMP and therefore can assume
+ * weaker (compiler barriers)
+ */
+#define virtio_mb() rte_mb()
+#define virtio_rmb() rte_compiler_barrier()
+#define virtio_wmb() rte_compiler_barrier()
+
+#ifdef RTE_PMD_PACKET_PREFETCH
+#define rte_packet_prefetch(p) rte_prefetch1(p)
+#else
+#define rte_packet_prefetch(p) do {} while(0)
+#endif
+
+#define VIRTQUEUE_MAX_NAME_SZ 32
+
+#define RTE_MBUF_DATA_DMA_ADDR(mb) \
+ (uint64_t) ((mb)->buf_physaddr + (mb)->data_off)
+
+#define VTNET_SQ_RQ_QUEUE_IDX 0
+#define VTNET_SQ_TQ_QUEUE_IDX 1
+#define VTNET_SQ_CQ_QUEUE_IDX 2
+
+enum { VTNET_RQ = 0, VTNET_TQ = 1, VTNET_CQ = 2 };
+/**
+ * The maximum virtqueue size is 2^15. Use that value as the end of
+ * descriptor chain terminator since it will never be a valid index
+ * in the descriptor table. This is used to verify we are correctly
+ * handling vq_free_cnt.
+ */
+#define VQ_RING_DESC_CHAIN_END 32768
+
+/**
+ * Control the RX mode, ie. promiscuous, allmulti, etc...
+ * All commands require an "out" sg entry containing a 1 byte
+ * state value, zero = disable, non-zero = enable. Commands
+ * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
+ * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
+ */
+#define VIRTIO_NET_CTRL_RX 0
+#define VIRTIO_NET_CTRL_RX_PROMISC 0
+#define VIRTIO_NET_CTRL_RX_ALLMULTI 1
+#define VIRTIO_NET_CTRL_RX_ALLUNI 2
+#define VIRTIO_NET_CTRL_RX_NOMULTI 3
+#define VIRTIO_NET_CTRL_RX_NOUNI 4
+#define VIRTIO_NET_CTRL_RX_NOBCAST 5
+
+/**
+ * Control the MAC
+ *
+ * The MAC filter table is managed by the hypervisor, the guest should
+ * assume the size is infinite. Filtering should be considered
+ * non-perfect, ie. based on hypervisor resources, the guest may
+ * received packets from sources not specified in the filter list.
+ *
+ * In addition to the class/cmd header, the TABLE_SET command requires
+ * two out scatterlists. Each contains a 4 byte count of entries followed
+ * by a concatenated byte stream of the ETH_ALEN MAC addresses. The
+ * first sg list contains unicast addresses, the second is for multicast.
+ * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
+ * is available.
+ *
+ * The ADDR_SET command requests one out scatterlist, it contains a
+ * 6 bytes MAC address. This functionality is present if the
+ * VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
+ */
+struct virtio_net_ctrl_mac {
+ uint32_t entries;
+ uint8_t macs[][ETHER_ADDR_LEN];
+} __attribute__((__packed__));
+
+#define VIRTIO_NET_CTRL_MAC 1
+ #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
+ #define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
+
+/**
+ * Control VLAN filtering
+ *
+ * The VLAN filter table is controlled via a simple ADD/DEL interface.
+ * VLAN IDs not added may be filtered by the hypervisor. Del is the
+ * opposite of add. Both commands expect an out entry containing a 2
+ * byte VLAN ID. VLAN filtering is available with the
+ * VIRTIO_NET_F_CTRL_VLAN feature bit.
+ */
+#define VIRTIO_NET_CTRL_VLAN 2
+#define VIRTIO_NET_CTRL_VLAN_ADD 0
+#define VIRTIO_NET_CTRL_VLAN_DEL 1
+
+struct virtio_net_ctrl_hdr {
+ uint8_t class;
+ uint8_t cmd;
+} __attribute__((packed));
+
+typedef uint8_t virtio_net_ctrl_ack;
+
+#define VIRTIO_NET_OK 0
+#define VIRTIO_NET_ERR 1
+
+#define VIRTIO_MAX_CTRL_DATA 2048
+
+struct virtio_pmd_ctrl {
+ struct virtio_net_ctrl_hdr hdr;
+ virtio_net_ctrl_ack status;
+ uint8_t data[VIRTIO_MAX_CTRL_DATA];
+};
+
+struct virtqueue {
+ struct virtio_hw *hw; /**< virtio_hw structure pointer. */
+ const struct rte_memzone *mz; /**< mem zone to populate RX ring. */
+ const struct rte_memzone *virtio_net_hdr_mz; /**< memzone to populate hdr. */
+ struct rte_mempool *mpool; /**< mempool for mbuf allocation */
+ uint16_t queue_id; /**< DPDK queue index. */
+ uint8_t port_id; /**< Device port identifier. */
+ uint16_t vq_queue_index; /**< PCI queue index */
+
+ void *vq_ring_virt_mem; /**< linear address of vring*/
+ unsigned int vq_ring_size;
+ phys_addr_t vq_ring_mem; /**< physical address of vring */
+
+ struct vring vq_ring; /**< vring keeping desc, used and avail */
+ uint16_t vq_free_cnt; /**< num of desc available */
+ uint16_t vq_nentries; /**< vring desc numbers */
+ uint16_t vq_free_thresh; /**< free threshold */
+ /**
+ * Head of the free chain in the descriptor table. If
+ * there are no free descriptors, this will be set to
+ * VQ_RING_DESC_CHAIN_END.
+ */
+ uint16_t vq_desc_head_idx;
+ uint16_t vq_desc_tail_idx;
+ /**
+ * Last consumed descriptor in the used table,
+ * trails vq_ring.used->idx.
+ */
+ uint16_t vq_used_cons_idx;
+ uint16_t vq_avail_idx;
+ phys_addr_t virtio_net_hdr_mem; /**< hdr for each xmit packet */
+
+ /* Statistics */
+ uint64_t packets;
+ uint64_t bytes;
+ uint64_t errors;
+
+ struct vq_desc_extra {
+ void *cookie;
+ uint16_t ndescs;
+ } vq_descx[0];
+};
+
+/* If multiqueue is provided by host, then we suppport it. */
+#ifndef VIRTIO_NET_F_MQ
+/* Device supports Receive Flow Steering */
+#define VIRTIO_NET_F_MQ 0x400000
+#define VIRTIO_NET_CTRL_MQ 4
+#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
+#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
+#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
+#endif
+#ifndef VIRTIO_NET_F_CTRL_MAC_ADDR
+#define VIRTIO_NET_F_CTRL_MAC_ADDR 0x800000
+#define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
+#endif
+
+/**
+ * This is the first element of the scatter-gather list. If you don't
+ * specify GSO or CSUM features, you can simply ignore the header.
+ */
+struct virtio_net_hdr {
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /**< Use csum_start,csum_offset*/
+ uint8_t flags;
+#define VIRTIO_NET_HDR_GSO_NONE 0 /**< Not a GSO frame */
+#define VIRTIO_NET_HDR_GSO_TCPV4 1 /**< GSO frame, IPv4 TCP (TSO) */
+#define VIRTIO_NET_HDR_GSO_UDP 3 /**< GSO frame, IPv4 UDP (UFO) */
+#define VIRTIO_NET_HDR_GSO_TCPV6 4 /**< GSO frame, IPv6 TCP */
+#define VIRTIO_NET_HDR_GSO_ECN 0x80 /**< TCP has ECN set */
+ uint8_t gso_type;
+ uint16_t hdr_len; /**< Ethernet + IP + tcp/udp hdrs */
+ uint16_t gso_size; /**< Bytes to append to hdr_len per frame */
+ uint16_t csum_start; /**< Position to start checksumming from */
+ uint16_t csum_offset; /**< Offset after that to place checksum */
+};
+
+/**
+ * This is the version of the header to use when the MRG_RXBUF
+ * feature has been negotiated.
+ */
+struct virtio_net_hdr_mrg_rxbuf {
+ struct virtio_net_hdr hdr;
+ uint16_t num_buffers; /**< Number of merged rx buffers */
+};
+
+/**
+ * Tell the backend not to interrupt us.
+ */
+void virtqueue_disable_intr(struct virtqueue *vq);
+/**
+ * Dump virtqueue internal structures, for debug purpose only.
+ */
+void virtqueue_dump(struct virtqueue *vq);
+/**
+ * Get all mbufs to be freed.
+ */
+struct rte_mbuf *virtqueue_detatch_unused(struct virtqueue *vq);
+
+static inline int
+virtqueue_full(const struct virtqueue *vq)
+{
+ return vq->vq_free_cnt == 0;
+}
+
+#define VIRTQUEUE_NUSED(vq) ((uint16_t)((vq)->vq_ring.used->idx - (vq)->vq_used_cons_idx))
+
+static inline void
+vq_update_avail_idx(struct virtqueue *vq)
+{
+ virtio_wmb();
+ vq->vq_ring.avail->idx = vq->vq_avail_idx;
+}
+
+static inline void
+vq_update_avail_ring(struct virtqueue *vq, uint16_t desc_idx)
+{
+ uint16_t avail_idx;
+ /*
+ * Place the head of the descriptor chain into the next slot and make
+ * it usable to the host. The chain is made available now rather than
+ * deferring to virtqueue_notify() in the hopes that if the host is
+ * currently running on another CPU, we can keep it processing the new
+ * descriptor.
+ */
+ avail_idx = (uint16_t)(vq->vq_avail_idx & (vq->vq_nentries - 1));
+ vq->vq_ring.avail->ring[avail_idx] = desc_idx;
+ vq->vq_avail_idx++;
+}
+
+static inline int
+virtqueue_kick_prepare(struct virtqueue *vq)
+{
+ return !(vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY);
+}
+
+static inline void
+virtqueue_notify(struct virtqueue *vq)
+{
+ /*
+ * Ensure updated avail->idx is visible to host.
+ * For virtio on IA, the notificaiton is through io port operation
+ * which is a serialization instruction itself.
+ */
+ VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_NOTIFY, vq->vq_queue_index);
+}
+
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
+#define VIRTQUEUE_DUMP(vq) do { \
+ uint16_t used_idx, nused; \
+ used_idx = (vq)->vq_ring.used->idx; \
+ nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \
+ PMD_INIT_LOG(DEBUG, \
+ "VQ: - size=%d; free=%d; used=%d; desc_head_idx=%d;" \
+ " avail.idx=%d; used_cons_idx=%d; used.idx=%d;" \
+ " avail.flags=0x%x; used.flags=0x%x", \
+ (vq)->vq_nentries, (vq)->vq_free_cnt, nused, \
+ (vq)->vq_desc_head_idx, (vq)->vq_ring.avail->idx, \
+ (vq)->vq_used_cons_idx, (vq)->vq_ring.used->idx, \
+ (vq)->vq_ring.avail->flags, (vq)->vq_ring.used->flags); \
+} while (0)
+#else
+#define VIRTQUEUE_DUMP(vq) do { } while (0)
+#endif
+
+#endif /* _VIRTQUEUE_H_ */
DIRS-$(CONFIG_RTE_LIBRTE_CFGFILE) += librte_cfgfile
DIRS-$(CONFIG_RTE_LIBRTE_CMDLINE) += librte_cmdline
DIRS-$(CONFIG_RTE_LIBRTE_ETHER) += librte_ether
-DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += librte_pmd_virtio
DIRS-$(CONFIG_RTE_LIBRTE_VMXNET3_PMD) += librte_pmd_vmxnet3
DIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += librte_pmd_xenvirt
DIRS-$(CONFIG_RTE_LIBRTE_VHOST) += librte_vhost
+++ /dev/null
-# BSD LICENSE
-#
-# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
-# All rights reserved.
-#
-# 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 Intel Corporation nor the names of its
-# contributors may be used to endorse or promote products derived
-# from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-include $(RTE_SDK)/mk/rte.vars.mk
-
-#
-# library name
-#
-LIB = librte_pmd_virtio.a
-
-CFLAGS += -O3
-CFLAGS += $(WERROR_FLAGS)
-
-EXPORT_MAP := rte_pmd_virtio_version.map
-
-LIBABIVER := 1
-
-#
-# all source are stored in SRCS-y
-#
-SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtqueue.c
-SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_pci.c
-SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_rxtx.c
-SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_ethdev.c
-
-
-# this lib depends upon:
-DEPDIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += lib/librte_eal lib/librte_ether
-DEPDIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += lib/librte_mempool lib/librte_mbuf
-DEPDIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += lib/librte_net lib/librte_malloc
-
-include $(RTE_SDK)/mk/rte.lib.mk
+++ /dev/null
-DPDK_2.0 {
-
- local: *;
-};
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stdint.h>
-#include <string.h>
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
-#ifdef RTE_EXEC_ENV_LINUXAPP
-#include <dirent.h>
-#include <fcntl.h>
-#endif
-
-#include <rte_ethdev.h>
-#include <rte_memcpy.h>
-#include <rte_string_fns.h>
-#include <rte_memzone.h>
-#include <rte_malloc.h>
-#include <rte_atomic.h>
-#include <rte_branch_prediction.h>
-#include <rte_pci.h>
-#include <rte_ether.h>
-#include <rte_common.h>
-
-#include <rte_memory.h>
-#include <rte_eal.h>
-#include <rte_dev.h>
-
-#include "virtio_ethdev.h"
-#include "virtio_pci.h"
-#include "virtio_logs.h"
-#include "virtqueue.h"
-
-
-static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
-static int virtio_dev_configure(struct rte_eth_dev *dev);
-static int virtio_dev_start(struct rte_eth_dev *dev);
-static void virtio_dev_stop(struct rte_eth_dev *dev);
-static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
-static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
-static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
-static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
-static void virtio_dev_info_get(struct rte_eth_dev *dev,
- struct rte_eth_dev_info *dev_info);
-static int virtio_dev_link_update(struct rte_eth_dev *dev,
- __rte_unused int wait_to_complete);
-
-static void virtio_set_hwaddr(struct virtio_hw *hw);
-static void virtio_get_hwaddr(struct virtio_hw *hw);
-
-static void virtio_dev_rx_queue_release(__rte_unused void *rxq);
-static void virtio_dev_tx_queue_release(__rte_unused void *txq);
-
-static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
-static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
-static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
-static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
- uint16_t vlan_id, int on);
-static void virtio_mac_addr_add(struct rte_eth_dev *dev,
- struct ether_addr *mac_addr,
- uint32_t index, uint32_t vmdq __rte_unused);
-static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
-static void virtio_mac_addr_set(struct rte_eth_dev *dev,
- struct ether_addr *mac_addr);
-
-static int virtio_dev_queue_stats_mapping_set(
- __rte_unused struct rte_eth_dev *eth_dev,
- __rte_unused uint16_t queue_id,
- __rte_unused uint8_t stat_idx,
- __rte_unused uint8_t is_rx);
-
-/*
- * The set of PCI devices this driver supports
- */
-static const struct rte_pci_id pci_id_virtio_map[] = {
-
-#define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
-#include "rte_pci_dev_ids.h"
-
-{ .vendor_id = 0, /* sentinel */ },
-};
-
-static int
-virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
- int *dlen, int pkt_num)
-{
- uint16_t head = vq->vq_desc_head_idx, i;
- int k, sum = 0;
- virtio_net_ctrl_ack status = ~0;
- struct virtio_pmd_ctrl result;
-
- ctrl->status = status;
-
- if (!vq->hw->cvq) {
- PMD_INIT_LOG(ERR,
- "%s(): Control queue is not supported.",
- __func__);
- return -1;
- }
-
- PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
- "vq->hw->cvq = %p vq = %p",
- vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
-
- if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
- return -1;
-
- memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
- sizeof(struct virtio_pmd_ctrl));
-
- /*
- * Format is enforced in qemu code:
- * One TX packet for header;
- * At least one TX packet per argument;
- * One RX packet for ACK.
- */
- vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
- vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
- vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
- vq->vq_free_cnt--;
- i = vq->vq_ring.desc[head].next;
-
- for (k = 0; k < pkt_num; k++) {
- vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
- vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
- + sizeof(struct virtio_net_ctrl_hdr)
- + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
- vq->vq_ring.desc[i].len = dlen[k];
- sum += dlen[k];
- vq->vq_free_cnt--;
- i = vq->vq_ring.desc[i].next;
- }
-
- vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
- vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
- + sizeof(struct virtio_net_ctrl_hdr);
- vq->vq_ring.desc[i].len = sizeof(ctrl->status);
- vq->vq_free_cnt--;
-
- vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
-
- vq_update_avail_ring(vq, head);
- vq_update_avail_idx(vq);
-
- PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
-
- virtqueue_notify(vq);
-
- rte_rmb();
- while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
- rte_rmb();
- usleep(100);
- }
-
- while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
- uint32_t idx, desc_idx, used_idx;
- struct vring_used_elem *uep;
-
- used_idx = (uint32_t)(vq->vq_used_cons_idx
- & (vq->vq_nentries - 1));
- uep = &vq->vq_ring.used->ring[used_idx];
- idx = (uint32_t) uep->id;
- desc_idx = idx;
-
- while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
- desc_idx = vq->vq_ring.desc[desc_idx].next;
- vq->vq_free_cnt++;
- }
-
- vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
- vq->vq_desc_head_idx = idx;
-
- vq->vq_used_cons_idx++;
- vq->vq_free_cnt++;
- }
-
- PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
- vq->vq_free_cnt, vq->vq_desc_head_idx);
-
- memcpy(&result, vq->virtio_net_hdr_mz->addr,
- sizeof(struct virtio_pmd_ctrl));
-
- return result.status;
-}
-
-static int
-virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct virtio_pmd_ctrl ctrl;
- int dlen[1];
- int ret;
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
- ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
- memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
-
- dlen[0] = sizeof(uint16_t);
-
- ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
- if (ret) {
- PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
- "failed, this is too late now...");
- return -EINVAL;
- }
-
- return 0;
-}
-
-int virtio_dev_queue_setup(struct rte_eth_dev *dev,
- int queue_type,
- uint16_t queue_idx,
- uint16_t vtpci_queue_idx,
- uint16_t nb_desc,
- unsigned int socket_id,
- struct virtqueue **pvq)
-{
- char vq_name[VIRTQUEUE_MAX_NAME_SZ];
- const struct rte_memzone *mz;
- uint16_t vq_size;
- int size;
- struct virtio_hw *hw = dev->data->dev_private;
- struct virtqueue *vq = NULL;
-
- /* Write the virtqueue index to the Queue Select Field */
- VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
- PMD_INIT_LOG(DEBUG, "selecting queue: %d", vtpci_queue_idx);
-
- /*
- * Read the virtqueue size from the Queue Size field
- * Always power of 2 and if 0 virtqueue does not exist
- */
- vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
- PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d", vq_size, nb_desc);
- if (nb_desc == 0)
- nb_desc = vq_size;
- if (vq_size == 0) {
- PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
- return -EINVAL;
- } else if (!rte_is_power_of_2(vq_size)) {
- PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
- return -EINVAL;
- } else if (nb_desc != vq_size) {
- PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size",
- nb_desc, vq_size);
- nb_desc = vq_size;
- }
-
- if (queue_type == VTNET_RQ) {
- snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
- dev->data->port_id, queue_idx);
- vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
- vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
- } else if (queue_type == VTNET_TQ) {
- snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
- dev->data->port_id, queue_idx);
- vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
- vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
- } else if (queue_type == VTNET_CQ) {
- snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
- dev->data->port_id);
- vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
- vq_size * sizeof(struct vq_desc_extra),
- RTE_CACHE_LINE_SIZE);
- }
- if (vq == NULL) {
- PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
- return (-ENOMEM);
- }
-
- vq->hw = hw;
- vq->port_id = dev->data->port_id;
- vq->queue_id = queue_idx;
- vq->vq_queue_index = vtpci_queue_idx;
- vq->vq_nentries = vq_size;
- vq->vq_free_cnt = vq_size;
-
- /*
- * Reserve a memzone for vring elements
- */
- size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
- vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
- PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
-
- mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
- socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
- if (mz == NULL) {
- rte_free(vq);
- return -ENOMEM;
- }
-
- /*
- * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
- * and only accepts 32 bit page frame number.
- * Check if the allocated physical memory exceeds 16TB.
- */
- if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
- PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
- rte_free(vq);
- return -ENOMEM;
- }
-
- memset(mz->addr, 0, sizeof(mz->len));
- vq->mz = mz;
- vq->vq_ring_mem = mz->phys_addr;
- vq->vq_ring_virt_mem = mz->addr;
- PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%"PRIx64, (uint64_t)mz->phys_addr);
- PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
- vq->virtio_net_hdr_mz = NULL;
- vq->virtio_net_hdr_mem = 0;
-
- if (queue_type == VTNET_TQ) {
- /*
- * For each xmit packet, allocate a virtio_net_hdr
- */
- snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
- dev->data->port_id, queue_idx);
- vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
- vq_size * hw->vtnet_hdr_size,
- socket_id, 0, RTE_CACHE_LINE_SIZE);
- if (vq->virtio_net_hdr_mz == NULL) {
- rte_free(vq);
- return -ENOMEM;
- }
- vq->virtio_net_hdr_mem =
- vq->virtio_net_hdr_mz->phys_addr;
- memset(vq->virtio_net_hdr_mz->addr, 0,
- vq_size * hw->vtnet_hdr_size);
- } else if (queue_type == VTNET_CQ) {
- /* Allocate a page for control vq command, data and status */
- snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
- dev->data->port_id);
- vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
- PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
- if (vq->virtio_net_hdr_mz == NULL) {
- rte_free(vq);
- return -ENOMEM;
- }
- vq->virtio_net_hdr_mem =
- vq->virtio_net_hdr_mz->phys_addr;
- memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
- }
-
- /*
- * Set guest physical address of the virtqueue
- * in VIRTIO_PCI_QUEUE_PFN config register of device
- */
- VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
- mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
- *pvq = vq;
- return 0;
-}
-
-static int
-virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
- uint32_t socket_id)
-{
- struct virtqueue *vq;
- uint16_t nb_desc = 0;
- int ret;
- struct virtio_hw *hw = dev->data->dev_private;
-
- PMD_INIT_FUNC_TRACE();
- ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
- vtpci_queue_idx, nb_desc, socket_id, &vq);
-
- if (ret < 0) {
- PMD_INIT_LOG(ERR, "control vq initialization failed");
- return ret;
- }
-
- hw->cvq = vq;
- return 0;
-}
-
-static void
-virtio_dev_close(struct rte_eth_dev *dev)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct rte_pci_device *pci_dev = dev->pci_dev;
-
- PMD_INIT_LOG(DEBUG, "virtio_dev_close");
-
- /* reset the NIC */
- if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
- vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
- vtpci_reset(hw);
- hw->started = 0;
- virtio_dev_free_mbufs(dev);
-}
-
-static void
-virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct virtio_pmd_ctrl ctrl;
- int dlen[1];
- int ret;
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
- ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
- ctrl.data[0] = 1;
- dlen[0] = 1;
-
- ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
- if (ret)
- PMD_INIT_LOG(ERR, "Failed to enable promisc");
-}
-
-static void
-virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct virtio_pmd_ctrl ctrl;
- int dlen[1];
- int ret;
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
- ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
- ctrl.data[0] = 0;
- dlen[0] = 1;
-
- ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
- if (ret)
- PMD_INIT_LOG(ERR, "Failed to disable promisc");
-}
-
-static void
-virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct virtio_pmd_ctrl ctrl;
- int dlen[1];
- int ret;
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
- ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
- ctrl.data[0] = 1;
- dlen[0] = 1;
-
- ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
- if (ret)
- PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
-}
-
-static void
-virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct virtio_pmd_ctrl ctrl;
- int dlen[1];
- int ret;
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
- ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
- ctrl.data[0] = 0;
- dlen[0] = 1;
-
- ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
-
- if (ret)
- PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
-}
-
-/*
- * dev_ops for virtio, bare necessities for basic operation
- */
-static const struct eth_dev_ops virtio_eth_dev_ops = {
- .dev_configure = virtio_dev_configure,
- .dev_start = virtio_dev_start,
- .dev_stop = virtio_dev_stop,
- .dev_close = virtio_dev_close,
- .promiscuous_enable = virtio_dev_promiscuous_enable,
- .promiscuous_disable = virtio_dev_promiscuous_disable,
- .allmulticast_enable = virtio_dev_allmulticast_enable,
- .allmulticast_disable = virtio_dev_allmulticast_disable,
-
- .dev_infos_get = virtio_dev_info_get,
- .stats_get = virtio_dev_stats_get,
- .stats_reset = virtio_dev_stats_reset,
- .link_update = virtio_dev_link_update,
- .rx_queue_setup = virtio_dev_rx_queue_setup,
- /* meaningfull only to multiple queue */
- .rx_queue_release = virtio_dev_rx_queue_release,
- .tx_queue_setup = virtio_dev_tx_queue_setup,
- /* meaningfull only to multiple queue */
- .tx_queue_release = virtio_dev_tx_queue_release,
- /* collect stats per queue */
- .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
- .vlan_filter_set = virtio_vlan_filter_set,
- .mac_addr_add = virtio_mac_addr_add,
- .mac_addr_remove = virtio_mac_addr_remove,
- .mac_addr_set = virtio_mac_addr_set,
-};
-
-static inline int
-virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
- struct rte_eth_link *link)
-{
- struct rte_eth_link *dst = link;
- struct rte_eth_link *src = &(dev->data->dev_link);
-
- if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
- *(uint64_t *)src) == 0)
- return -1;
-
- return 0;
-}
-
-/**
- * Atomically writes the link status information into global
- * structure rte_eth_dev.
- *
- * @param dev
- * - Pointer to the structure rte_eth_dev to read from.
- * - Pointer to the buffer to be saved with the link status.
- *
- * @return
- * - On success, zero.
- * - On failure, negative value.
- */
-static inline int
-virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
- struct rte_eth_link *link)
-{
- struct rte_eth_link *dst = &(dev->data->dev_link);
- struct rte_eth_link *src = link;
-
- if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
- *(uint64_t *)src) == 0)
- return -1;
-
- return 0;
-}
-
-static void
-virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
-{
- unsigned i;
-
- for (i = 0; i < dev->data->nb_tx_queues; i++) {
- const struct virtqueue *txvq = dev->data->tx_queues[i];
- if (txvq == NULL)
- continue;
-
- stats->opackets += txvq->packets;
- stats->obytes += txvq->bytes;
- stats->oerrors += txvq->errors;
-
- if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
- stats->q_opackets[i] = txvq->packets;
- stats->q_obytes[i] = txvq->bytes;
- }
- }
-
- for (i = 0; i < dev->data->nb_rx_queues; i++) {
- const struct virtqueue *rxvq = dev->data->rx_queues[i];
- if (rxvq == NULL)
- continue;
-
- stats->ipackets += rxvq->packets;
- stats->ibytes += rxvq->bytes;
- stats->ierrors += rxvq->errors;
-
- if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
- stats->q_ipackets[i] = rxvq->packets;
- stats->q_ibytes[i] = rxvq->bytes;
- }
- }
-
- stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
-}
-
-static void
-virtio_dev_stats_reset(struct rte_eth_dev *dev)
-{
- unsigned int i;
-
- for (i = 0; i < dev->data->nb_tx_queues; i++) {
- struct virtqueue *txvq = dev->data->tx_queues[i];
- if (txvq == NULL)
- continue;
-
- txvq->packets = 0;
- txvq->bytes = 0;
- txvq->errors = 0;
- }
-
- for (i = 0; i < dev->data->nb_rx_queues; i++) {
- struct virtqueue *rxvq = dev->data->rx_queues[i];
- if (rxvq == NULL)
- continue;
-
- rxvq->packets = 0;
- rxvq->bytes = 0;
- rxvq->errors = 0;
- }
-
- dev->data->rx_mbuf_alloc_failed = 0;
-}
-
-static void
-virtio_set_hwaddr(struct virtio_hw *hw)
-{
- vtpci_write_dev_config(hw,
- offsetof(struct virtio_net_config, mac),
- &hw->mac_addr, ETHER_ADDR_LEN);
-}
-
-static void
-virtio_get_hwaddr(struct virtio_hw *hw)
-{
- if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
- vtpci_read_dev_config(hw,
- offsetof(struct virtio_net_config, mac),
- &hw->mac_addr, ETHER_ADDR_LEN);
- } else {
- eth_random_addr(&hw->mac_addr[0]);
- virtio_set_hwaddr(hw);
- }
-}
-
-static int
-virtio_mac_table_set(struct virtio_hw *hw,
- const struct virtio_net_ctrl_mac *uc,
- const struct virtio_net_ctrl_mac *mc)
-{
- struct virtio_pmd_ctrl ctrl;
- int err, len[2];
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
- ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
-
- len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
- memcpy(ctrl.data, uc, len[0]);
-
- len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
- memcpy(ctrl.data + len[0], mc, len[1]);
-
- err = virtio_send_command(hw->cvq, &ctrl, len, 2);
- if (err != 0)
- PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
-
- return err;
-}
-
-static void
-virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
- uint32_t index, uint32_t vmdq __rte_unused)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- const struct ether_addr *addrs = dev->data->mac_addrs;
- unsigned int i;
- struct virtio_net_ctrl_mac *uc, *mc;
-
- if (index >= VIRTIO_MAX_MAC_ADDRS) {
- PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
- return;
- }
-
- uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
- uc->entries = 0;
- mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
- mc->entries = 0;
-
- for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
- const struct ether_addr *addr
- = (i == index) ? mac_addr : addrs + i;
- struct virtio_net_ctrl_mac *tbl
- = is_multicast_ether_addr(addr) ? mc : uc;
-
- memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
- }
-
- virtio_mac_table_set(hw, uc, mc);
-}
-
-static void
-virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct ether_addr *addrs = dev->data->mac_addrs;
- struct virtio_net_ctrl_mac *uc, *mc;
- unsigned int i;
-
- if (index >= VIRTIO_MAX_MAC_ADDRS) {
- PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
- return;
- }
-
- uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
- uc->entries = 0;
- mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
- mc->entries = 0;
-
- for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
- struct virtio_net_ctrl_mac *tbl;
-
- if (i == index || is_zero_ether_addr(addrs + i))
- continue;
-
- tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
- memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
- }
-
- virtio_mac_table_set(hw, uc, mc);
-}
-
-static void
-virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
-{
- struct virtio_hw *hw = dev->data->dev_private;
-
- memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
-
- /* Use atomic update if available */
- if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
- struct virtio_pmd_ctrl ctrl;
- int len = ETHER_ADDR_LEN;
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
- ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
-
- memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
- virtio_send_command(hw->cvq, &ctrl, &len, 1);
- } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
- virtio_set_hwaddr(hw);
-}
-
-static int
-virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
-{
- struct virtio_hw *hw = dev->data->dev_private;
- struct virtio_pmd_ctrl ctrl;
- int len;
-
- if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
- return -ENOTSUP;
-
- ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
- ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
- memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
- len = sizeof(vlan_id);
-
- return virtio_send_command(hw->cvq, &ctrl, &len, 1);
-}
-
-static void
-virtio_negotiate_features(struct virtio_hw *hw)
-{
- uint32_t host_features, mask;
-
- /* checksum offload not implemented */
- mask = VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
-
- /* TSO and LRO are only available when their corresponding
- * checksum offload feature is also negotiated.
- */
- mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN;
- mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
- mask |= VTNET_LRO_FEATURES;
-
- /* not negotiating INDIRECT descriptor table support */
- mask |= VIRTIO_RING_F_INDIRECT_DESC;
-
- /* Prepare guest_features: feature that driver wants to support */
- hw->guest_features = VTNET_FEATURES & ~mask;
- PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
- hw->guest_features);
-
- /* Read device(host) feature bits */
- host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
- PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
- host_features);
-
- /*
- * Negotiate features: Subset of device feature bits are written back
- * guest feature bits.
- */
- hw->guest_features = vtpci_negotiate_features(hw, host_features);
- PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
- hw->guest_features);
-}
-
-#ifdef RTE_EXEC_ENV_LINUXAPP
-static int
-parse_sysfs_value(const char *filename, unsigned long *val)
-{
- FILE *f;
- char buf[BUFSIZ];
- char *end = NULL;
-
- f = fopen(filename, "r");
- if (f == NULL) {
- PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
- __func__, filename);
- return -1;
- }
-
- if (fgets(buf, sizeof(buf), f) == NULL) {
- PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
- __func__, filename);
- fclose(f);
- return -1;
- }
- *val = strtoul(buf, &end, 0);
- if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
- PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
- __func__, filename);
- fclose(f);
- return -1;
- }
- fclose(f);
- return 0;
-}
-
-static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
- unsigned int *uio_num)
-{
- struct dirent *e;
- DIR *dir;
- char dirname[PATH_MAX];
-
- /* depending on kernel version, uio can be located in uio/uioX
- * or uio:uioX */
- snprintf(dirname, sizeof(dirname),
- SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
- loc->domain, loc->bus, loc->devid, loc->function);
- dir = opendir(dirname);
- if (dir == NULL) {
- /* retry with the parent directory */
- snprintf(dirname, sizeof(dirname),
- SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
- loc->domain, loc->bus, loc->devid, loc->function);
- dir = opendir(dirname);
-
- if (dir == NULL) {
- PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
- return -1;
- }
- }
-
- /* take the first file starting with "uio" */
- while ((e = readdir(dir)) != NULL) {
- /* format could be uio%d ...*/
- int shortprefix_len = sizeof("uio") - 1;
- /* ... or uio:uio%d */
- int longprefix_len = sizeof("uio:uio") - 1;
- char *endptr;
-
- if (strncmp(e->d_name, "uio", 3) != 0)
- continue;
-
- /* first try uio%d */
- errno = 0;
- *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
- if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
- snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
- break;
- }
-
- /* then try uio:uio%d */
- errno = 0;
- *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
- if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
- snprintf(buf, buflen, "%s/uio:uio%u", dirname,
- *uio_num);
- break;
- }
- }
- closedir(dir);
-
- /* No uio resource found */
- if (e == NULL) {
- PMD_INIT_LOG(ERR, "Could not find uio resource");
- return -1;
- }
-
- return 0;
-}
-
-static int
-virtio_has_msix(const struct rte_pci_addr *loc)
-{
- DIR *d;
- char dirname[PATH_MAX];
-
- snprintf(dirname, sizeof(dirname),
- SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
- loc->domain, loc->bus, loc->devid, loc->function);
-
- d = opendir(dirname);
- if (d)
- closedir(d);
-
- return (d != NULL);
-}
-
-/* Extract I/O port numbers from sysfs */
-static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
-{
- char dirname[PATH_MAX];
- char filename[PATH_MAX];
- unsigned long start, size;
- unsigned int uio_num;
-
- if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
- return -1;
-
- /* get portio size */
- snprintf(filename, sizeof(filename),
- "%s/portio/port0/size", dirname);
- if (parse_sysfs_value(filename, &size) < 0) {
- PMD_INIT_LOG(ERR, "%s(): cannot parse size",
- __func__);
- return -1;
- }
-
- /* get portio start */
- snprintf(filename, sizeof(filename),
- "%s/portio/port0/start", dirname);
- if (parse_sysfs_value(filename, &start) < 0) {
- PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
- __func__);
- return -1;
- }
- pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
- pci_dev->mem_resource[0].len = (uint64_t)size;
- PMD_INIT_LOG(DEBUG,
- "PCI Port IO found start=0x%lx with size=0x%lx",
- start, size);
-
- /* save fd */
- memset(dirname, 0, sizeof(dirname));
- snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
- pci_dev->intr_handle.fd = open(dirname, O_RDWR);
- if (pci_dev->intr_handle.fd < 0) {
- PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
- dirname, strerror(errno));
- return -1;
- }
-
- pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
- pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
-
- return 0;
-}
-
-/* Extract port I/O numbers from proc/ioports */
-static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
-{
- uint16_t start, end;
- int size;
- FILE *fp;
- char *line = NULL;
- char pci_id[16];
- int found = 0;
- size_t linesz;
-
- snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
- pci_dev->addr.domain,
- pci_dev->addr.bus,
- pci_dev->addr.devid,
- pci_dev->addr.function);
-
- fp = fopen("/proc/ioports", "r");
- if (fp == NULL) {
- PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
- return -1;
- }
-
- while (getdelim(&line, &linesz, '\n', fp) > 0) {
- char *ptr = line;
- char *left;
- int n;
-
- n = strcspn(ptr, ":");
- ptr[n] = 0;
- left = &ptr[n+1];
-
- while (*left && isspace(*left))
- left++;
-
- if (!strncmp(left, pci_id, strlen(pci_id))) {
- found = 1;
-
- while (*ptr && isspace(*ptr))
- ptr++;
-
- sscanf(ptr, "%04hx-%04hx", &start, &end);
- size = end - start + 1;
-
- break;
- }
- }
-
- free(line);
- fclose(fp);
-
- if (!found)
- return -1;
-
- pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
- pci_dev->mem_resource[0].len = (uint64_t)size;
- PMD_INIT_LOG(DEBUG,
- "PCI Port IO found start=0x%x with size=0x%x",
- start, size);
-
- /* can't support lsc interrupt without uio */
- pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
-
- return 0;
-}
-
-/* Extract I/O port numbers from sysfs */
-static int virtio_resource_init(struct rte_pci_device *pci_dev)
-{
- if (virtio_resource_init_by_uio(pci_dev) == 0)
- return 0;
- else
- return virtio_resource_init_by_ioports(pci_dev);
-}
-
-#else
-static int
-virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
-{
- /* nic_uio does not enable interrupts, return 0 (false). */
- return 0;
-}
-
-static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
-{
- /* no setup required */
- return 0;
-}
-#endif
-
-/*
- * Process Virtio Config changed interrupt and call the callback
- * if link state changed.
- */
-static void
-virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
- void *param)
-{
- struct rte_eth_dev *dev = param;
- struct virtio_hw *hw = dev->data->dev_private;
- uint8_t isr;
-
- /* Read interrupt status which clears interrupt */
- isr = vtpci_isr(hw);
- PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
-
- if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
- PMD_DRV_LOG(ERR, "interrupt enable failed");
-
- if (isr & VIRTIO_PCI_ISR_CONFIG) {
- if (virtio_dev_link_update(dev, 0) == 0)
- _rte_eth_dev_callback_process(dev,
- RTE_ETH_EVENT_INTR_LSC);
- }
-
-}
-
-static void
-rx_func_get(struct rte_eth_dev *eth_dev)
-{
- struct virtio_hw *hw = eth_dev->data->dev_private;
- if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
- eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
- else
- eth_dev->rx_pkt_burst = &virtio_recv_pkts;
-}
-
-/*
- * This function is based on probe() function in virtio_pci.c
- * It returns 0 on success.
- */
-static int
-eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
-{
- struct virtio_hw *hw = eth_dev->data->dev_private;
- struct virtio_net_config *config;
- struct virtio_net_config local_config;
- uint32_t offset_conf = sizeof(config->mac);
- struct rte_pci_device *pci_dev;
-
- RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
-
- eth_dev->dev_ops = &virtio_eth_dev_ops;
- eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
-
- if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
- rx_func_get(eth_dev);
- return 0;
- }
-
- /* Allocate memory for storing MAC addresses */
- eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
- if (eth_dev->data->mac_addrs == NULL) {
- PMD_INIT_LOG(ERR,
- "Failed to allocate %d bytes needed to store MAC addresses",
- ETHER_ADDR_LEN);
- return -ENOMEM;
- }
-
- pci_dev = eth_dev->pci_dev;
- if (virtio_resource_init(pci_dev) < 0)
- return -1;
-
- hw->use_msix = virtio_has_msix(&pci_dev->addr);
- hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
-
- /* Reset the device although not necessary at startup */
- vtpci_reset(hw);
-
- /* Tell the host we've noticed this device. */
- vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
-
- /* Tell the host we've known how to drive the device. */
- vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
- virtio_negotiate_features(hw);
-
- rx_func_get(eth_dev);
-
- /* Setting up rx_header size for the device */
- if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
- hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
- else
- hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
-
- /* Copy the permanent MAC address to: virtio_hw */
- virtio_get_hwaddr(hw);
- ether_addr_copy((struct ether_addr *) hw->mac_addr,
- ð_dev->data->mac_addrs[0]);
- PMD_INIT_LOG(DEBUG,
- "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
- hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
- hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
-
- if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
- config = &local_config;
-
- if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
- offset_conf += sizeof(config->status);
- } else {
- PMD_INIT_LOG(DEBUG,
- "VIRTIO_NET_F_STATUS is not supported");
- config->status = 0;
- }
-
- if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
- offset_conf += sizeof(config->max_virtqueue_pairs);
- } else {
- PMD_INIT_LOG(DEBUG,
- "VIRTIO_NET_F_MQ is not supported");
- config->max_virtqueue_pairs = 1;
- }
-
- vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
-
- hw->max_rx_queues =
- (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
- VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
- hw->max_tx_queues =
- (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
- VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
-
- virtio_dev_cq_queue_setup(eth_dev,
- config->max_virtqueue_pairs * 2,
- SOCKET_ID_ANY);
-
- PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
- config->max_virtqueue_pairs);
- PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
- PMD_INIT_LOG(DEBUG,
- "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
- config->mac[0], config->mac[1],
- config->mac[2], config->mac[3],
- config->mac[4], config->mac[5]);
- } else {
- hw->max_rx_queues = 1;
- hw->max_tx_queues = 1;
- }
-
- eth_dev->data->nb_rx_queues = hw->max_rx_queues;
- eth_dev->data->nb_tx_queues = hw->max_tx_queues;
-
- PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d hw->max_tx_queues=%d",
- hw->max_rx_queues, hw->max_tx_queues);
- PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
- eth_dev->data->port_id, pci_dev->id.vendor_id,
- pci_dev->id.device_id);
-
- /* Setup interrupt callback */
- if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
- rte_intr_callback_register(&pci_dev->intr_handle,
- virtio_interrupt_handler, eth_dev);
-
- virtio_dev_cq_start(eth_dev);
-
- return 0;
-}
-
-static struct eth_driver rte_virtio_pmd = {
- {
- .name = "rte_virtio_pmd",
- .id_table = pci_id_virtio_map,
- },
- .eth_dev_init = eth_virtio_dev_init,
- .dev_private_size = sizeof(struct virtio_hw),
-};
-
-/*
- * Driver initialization routine.
- * Invoked once at EAL init time.
- * Register itself as the [Poll Mode] Driver of PCI virtio devices.
- * Returns 0 on success.
- */
-static int
-rte_virtio_pmd_init(const char *name __rte_unused,
- const char *param __rte_unused)
-{
- if (rte_eal_iopl_init() != 0) {
- PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
- return -1;
- }
-
- rte_eth_driver_register(&rte_virtio_pmd);
- return 0;
-}
-
-/*
- * Only 1 queue is supported, no queue release related operation
- */
-static void
-virtio_dev_rx_queue_release(__rte_unused void *rxq)
-{
-}
-
-static void
-virtio_dev_tx_queue_release(__rte_unused void *txq)
-{
-}
-
-/*
- * Configure virtio device
- * It returns 0 on success.
- */
-static int
-virtio_dev_configure(struct rte_eth_dev *dev)
-{
- const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
- struct virtio_hw *hw = dev->data->dev_private;
- struct rte_pci_device *pci_dev = dev->pci_dev;
-
- PMD_INIT_LOG(DEBUG, "configure");
-
- if (rxmode->hw_ip_checksum) {
- PMD_DRV_LOG(ERR, "HW IP checksum not supported");
- return (-EINVAL);
- }
-
- hw->vlan_strip = rxmode->hw_vlan_strip;
-
- if (rxmode->hw_vlan_filter
- && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
- PMD_DRV_LOG(NOTICE,
- "vlan filtering not available on this host");
- return -ENOTSUP;
- }
-
- if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
- if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
- PMD_DRV_LOG(ERR, "failed to set config vector");
- return -EBUSY;
- }
-
- return 0;
-}
-
-
-static int
-virtio_dev_start(struct rte_eth_dev *dev)
-{
- uint16_t nb_queues, i;
- struct virtio_hw *hw = dev->data->dev_private;
- struct rte_pci_device *pci_dev = dev->pci_dev;
-
- /* check if lsc interrupt feature is enabled */
- if ((dev->data->dev_conf.intr_conf.lsc) &&
- (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
- if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
- PMD_DRV_LOG(ERR, "link status not supported by host");
- return -ENOTSUP;
- }
-
- if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
- PMD_DRV_LOG(ERR, "interrupt enable failed");
- return -EIO;
- }
- }
-
- /* Initialize Link state */
- virtio_dev_link_update(dev, 0);
-
- /* On restart after stop do not touch queues */
- if (hw->started)
- return 0;
-
- /* Do final configuration before rx/tx engine starts */
- virtio_dev_rxtx_start(dev);
- vtpci_reinit_complete(hw);
-
- hw->started = 1;
-
- /*Notify the backend
- *Otherwise the tap backend might already stop its queue due to fullness.
- *vhost backend will have no chance to be waked up
- */
- nb_queues = dev->data->nb_rx_queues;
- if (nb_queues > 1) {
- if (virtio_set_multiple_queues(dev, nb_queues) != 0)
- return -EINVAL;
- }
-
- PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
-
- for (i = 0; i < nb_queues; i++)
- virtqueue_notify(dev->data->rx_queues[i]);
-
- PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
-
- for (i = 0; i < dev->data->nb_rx_queues; i++)
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
-
- for (i = 0; i < dev->data->nb_tx_queues; i++)
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
-
- return 0;
-}
-
-static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
-{
- struct rte_mbuf *buf;
- int i, mbuf_num = 0;
-
- for (i = 0; i < dev->data->nb_rx_queues; i++) {
- PMD_INIT_LOG(DEBUG,
- "Before freeing rxq[%d] used and unused buf", i);
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
-
- while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
- dev->data->rx_queues[i])) != NULL) {
- rte_pktmbuf_free(buf);
- mbuf_num++;
- }
-
- PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
- PMD_INIT_LOG(DEBUG,
- "After freeing rxq[%d] used and unused buf", i);
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
- }
-
- for (i = 0; i < dev->data->nb_tx_queues; i++) {
- PMD_INIT_LOG(DEBUG,
- "Before freeing txq[%d] used and unused bufs",
- i);
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
-
- mbuf_num = 0;
- while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
- dev->data->tx_queues[i])) != NULL) {
- rte_pktmbuf_free(buf);
-
- mbuf_num++;
- }
-
- PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
- PMD_INIT_LOG(DEBUG,
- "After freeing txq[%d] used and unused buf", i);
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
- }
-}
-
-/*
- * Stop device: disable interrupt and mark link down
- */
-static void
-virtio_dev_stop(struct rte_eth_dev *dev)
-{
- struct rte_eth_link link;
-
- PMD_INIT_LOG(DEBUG, "stop");
-
- if (dev->data->dev_conf.intr_conf.lsc)
- rte_intr_disable(&dev->pci_dev->intr_handle);
-
- memset(&link, 0, sizeof(link));
- virtio_dev_atomic_write_link_status(dev, &link);
-}
-
-static int
-virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
-{
- struct rte_eth_link link, old;
- uint16_t status;
- struct virtio_hw *hw = dev->data->dev_private;
- memset(&link, 0, sizeof(link));
- virtio_dev_atomic_read_link_status(dev, &link);
- old = link;
- link.link_duplex = FULL_DUPLEX;
- link.link_speed = SPEED_10G;
-
- if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
- PMD_INIT_LOG(DEBUG, "Get link status from hw");
- vtpci_read_dev_config(hw,
- offsetof(struct virtio_net_config, status),
- &status, sizeof(status));
- if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
- link.link_status = 0;
- PMD_INIT_LOG(DEBUG, "Port %d is down",
- dev->data->port_id);
- } else {
- link.link_status = 1;
- PMD_INIT_LOG(DEBUG, "Port %d is up",
- dev->data->port_id);
- }
- } else {
- link.link_status = 1; /* Link up */
- }
- virtio_dev_atomic_write_link_status(dev, &link);
-
- return (old.link_status == link.link_status) ? -1 : 0;
-}
-
-static void
-virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
-{
- struct virtio_hw *hw = dev->data->dev_private;
-
- dev_info->driver_name = dev->driver->pci_drv.name;
- dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
- dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
- dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
- dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
- dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
- dev_info->default_txconf = (struct rte_eth_txconf) {
- .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
- };
-}
-
-/*
- * It enables testpmd to collect per queue stats.
- */
-static int
-virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
-__rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
-__rte_unused uint8_t is_rx)
-{
- return 0;
-}
-
-static struct rte_driver rte_virtio_driver = {
- .type = PMD_PDEV,
- .init = rte_virtio_pmd_init,
-};
-
-PMD_REGISTER_DRIVER(rte_virtio_driver);
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _VIRTIO_ETHDEV_H_
-#define _VIRTIO_ETHDEV_H_
-
-#include <stdint.h>
-
-#include "virtio_pci.h"
-
-#define SPEED_10 10
-#define SPEED_100 100
-#define SPEED_1000 1000
-#define SPEED_10G 10000
-#define HALF_DUPLEX 1
-#define FULL_DUPLEX 2
-
-#ifndef PAGE_SIZE
-#define PAGE_SIZE 4096
-#endif
-
-#define VIRTIO_MAX_RX_QUEUES 128
-#define VIRTIO_MAX_TX_QUEUES 128
-#define VIRTIO_MAX_MAC_ADDRS 64
-#define VIRTIO_MIN_RX_BUFSIZE 64
-#define VIRTIO_MAX_RX_PKTLEN 9728
-
-/* Features desired/implemented by this driver. */
-#define VTNET_FEATURES \
- (VIRTIO_NET_F_MAC | \
- VIRTIO_NET_F_STATUS | \
- VIRTIO_NET_F_MQ | \
- VIRTIO_NET_F_CTRL_MAC_ADDR | \
- VIRTIO_NET_F_CTRL_VQ | \
- VIRTIO_NET_F_CTRL_RX | \
- VIRTIO_NET_F_CTRL_VLAN | \
- VIRTIO_NET_F_CSUM | \
- VIRTIO_NET_F_HOST_TSO4 | \
- VIRTIO_NET_F_HOST_TSO6 | \
- VIRTIO_NET_F_HOST_ECN | \
- VIRTIO_NET_F_GUEST_CSUM | \
- VIRTIO_NET_F_GUEST_TSO4 | \
- VIRTIO_NET_F_GUEST_TSO6 | \
- VIRTIO_NET_F_GUEST_ECN | \
- VIRTIO_NET_F_MRG_RXBUF | \
- VIRTIO_RING_F_INDIRECT_DESC)
-
-/*
- * CQ function prototype
- */
-void virtio_dev_cq_start(struct rte_eth_dev *dev);
-
-/*
- * RX/TX function prototypes
- */
-void virtio_dev_rxtx_start(struct rte_eth_dev *dev);
-
-int virtio_dev_queue_setup(struct rte_eth_dev *dev,
- int queue_type,
- uint16_t queue_idx,
- uint16_t vtpci_queue_idx,
- uint16_t nb_desc,
- unsigned int socket_id,
- struct virtqueue **pvq);
-
-int virtio_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
- uint16_t nb_rx_desc, unsigned int socket_id,
- const struct rte_eth_rxconf *rx_conf,
- struct rte_mempool *mb_pool);
-
-int virtio_dev_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
- uint16_t nb_tx_desc, unsigned int socket_id,
- const struct rte_eth_txconf *tx_conf);
-
-uint16_t virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
- uint16_t nb_pkts);
-
-uint16_t virtio_recv_mergeable_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
- uint16_t nb_pkts);
-
-uint16_t virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
- uint16_t nb_pkts);
-
-
-/*
- * The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us
- * frames larger than 1514 bytes. We do not yet support software LRO
- * via tcp_lro_rx().
- */
-#define VTNET_LRO_FEATURES (VIRTIO_NET_F_GUEST_TSO4 | \
- VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN)
-
-
-#endif /* _VIRTIO_ETHDEV_H_ */
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _VIRTIO_LOGS_H_
-#define _VIRTIO_LOGS_H_
-
-#include <rte_log.h>
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_INIT
-#define PMD_INIT_LOG(level, fmt, args...) \
- RTE_LOG(level, PMD, "%s(): " fmt "\n", __func__, ## args)
-#define PMD_INIT_FUNC_TRACE() PMD_INIT_LOG(DEBUG, " >>")
-#else
-#define PMD_INIT_LOG(level, fmt, args...) do { } while(0)
-#define PMD_INIT_FUNC_TRACE() do { } while(0)
-#endif
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_RX
-#define PMD_RX_LOG(level, fmt, args...) \
- RTE_LOG(level, PMD, "%s() rx: " fmt , __func__, ## args)
-#else
-#define PMD_RX_LOG(level, fmt, args...) do { } while(0)
-#endif
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_TX
-#define PMD_TX_LOG(level, fmt, args...) \
- RTE_LOG(level, PMD, "%s() tx: " fmt , __func__, ## args)
-#else
-#define PMD_TX_LOG(level, fmt, args...) do { } while(0)
-#endif
-
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DRIVER
-#define PMD_DRV_LOG(level, fmt, args...) \
- RTE_LOG(level, PMD, "%s(): " fmt , __func__, ## args)
-#else
-#define PMD_DRV_LOG(level, fmt, args...) do { } while(0)
-#endif
-
-#endif /* _VIRTIO_LOGS_H_ */
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#include <stdint.h>
-
-#include "virtio_pci.h"
-#include "virtio_logs.h"
-
-static uint8_t vtpci_get_status(struct virtio_hw *);
-
-void
-vtpci_read_dev_config(struct virtio_hw *hw, uint64_t offset,
- void *dst, int length)
-{
- uint64_t off;
- uint8_t *d;
- int size;
-
- off = VIRTIO_PCI_CONFIG(hw) + offset;
- for (d = dst; length > 0; d += size, off += size, length -= size) {
- if (length >= 4) {
- size = 4;
- *(uint32_t *)d = VIRTIO_READ_REG_4(hw, off);
- } else if (length >= 2) {
- size = 2;
- *(uint16_t *)d = VIRTIO_READ_REG_2(hw, off);
- } else {
- size = 1;
- *d = VIRTIO_READ_REG_1(hw, off);
- }
- }
-}
-
-void
-vtpci_write_dev_config(struct virtio_hw *hw, uint64_t offset,
- void *src, int length)
-{
- uint64_t off;
- uint8_t *s;
- int size;
-
- off = VIRTIO_PCI_CONFIG(hw) + offset;
- for (s = src; length > 0; s += size, off += size, length -= size) {
- if (length >= 4) {
- size = 4;
- VIRTIO_WRITE_REG_4(hw, off, *(uint32_t *)s);
- } else if (length >= 2) {
- size = 2;
- VIRTIO_WRITE_REG_2(hw, off, *(uint16_t *)s);
- } else {
- size = 1;
- VIRTIO_WRITE_REG_1(hw, off, *s);
- }
- }
-}
-
-uint32_t
-vtpci_negotiate_features(struct virtio_hw *hw, uint32_t host_features)
-{
- uint32_t features;
- /*
- * Limit negotiated features to what the driver, virtqueue, and
- * host all support.
- */
- features = host_features & hw->guest_features;
-
- VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_GUEST_FEATURES, features);
- return features;
-}
-
-
-void
-vtpci_reset(struct virtio_hw *hw)
-{
- /*
- * Setting the status to RESET sets the host device to
- * the original, uninitialized state.
- */
- vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_RESET);
- vtpci_get_status(hw);
-}
-
-void
-vtpci_reinit_complete(struct virtio_hw *hw)
-{
- vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER_OK);
-}
-
-static uint8_t
-vtpci_get_status(struct virtio_hw *hw)
-{
- return VIRTIO_READ_REG_1(hw, VIRTIO_PCI_STATUS);
-}
-
-void
-vtpci_set_status(struct virtio_hw *hw, uint8_t status)
-{
- if (status != VIRTIO_CONFIG_STATUS_RESET)
- status = (uint8_t)(status | vtpci_get_status(hw));
-
- VIRTIO_WRITE_REG_1(hw, VIRTIO_PCI_STATUS, status);
-}
-
-uint8_t
-vtpci_isr(struct virtio_hw *hw)
-{
-
- return VIRTIO_READ_REG_1(hw, VIRTIO_PCI_ISR);
-}
-
-
-/* Enable one vector (0) for Link State Intrerrupt */
-uint16_t
-vtpci_irq_config(struct virtio_hw *hw, uint16_t vec)
-{
- VIRTIO_WRITE_REG_2(hw, VIRTIO_MSI_CONFIG_VECTOR, vec);
- return VIRTIO_READ_REG_2(hw, VIRTIO_MSI_CONFIG_VECTOR);
-}
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _VIRTIO_PCI_H_
-#define _VIRTIO_PCI_H_
-
-#include <stdint.h>
-
-#ifdef __FreeBSD__
-#include <sys/types.h>
-#include <machine/cpufunc.h>
-#else
-#include <sys/io.h>
-#endif
-
-#include <rte_ethdev.h>
-
-struct virtqueue;
-
-/* VirtIO PCI vendor/device ID. */
-#define VIRTIO_PCI_VENDORID 0x1AF4
-#define VIRTIO_PCI_DEVICEID_MIN 0x1000
-#define VIRTIO_PCI_DEVICEID_MAX 0x103F
-
-/* VirtIO ABI version, this must match exactly. */
-#define VIRTIO_PCI_ABI_VERSION 0
-
-/*
- * VirtIO Header, located in BAR 0.
- */
-#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/
-#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */
-#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */
-#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */
-#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */
-#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */
-#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */
-#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading
- * also clears the register (8, RO) */
-/* Only if MSIX is enabled: */
-#define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */
-#define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications
- (16, RW) */
-
-/* The bit of the ISR which indicates a device has an interrupt. */
-#define VIRTIO_PCI_ISR_INTR 0x1
-/* The bit of the ISR which indicates a device configuration change. */
-#define VIRTIO_PCI_ISR_CONFIG 0x2
-/* Vector value used to disable MSI for queue. */
-#define VIRTIO_MSI_NO_VECTOR 0xFFFF
-
-/* VirtIO device IDs. */
-#define VIRTIO_ID_NETWORK 0x01
-#define VIRTIO_ID_BLOCK 0x02
-#define VIRTIO_ID_CONSOLE 0x03
-#define VIRTIO_ID_ENTROPY 0x04
-#define VIRTIO_ID_BALLOON 0x05
-#define VIRTIO_ID_IOMEMORY 0x06
-#define VIRTIO_ID_9P 0x09
-
-/* Status byte for guest to report progress. */
-#define VIRTIO_CONFIG_STATUS_RESET 0x00
-#define VIRTIO_CONFIG_STATUS_ACK 0x01
-#define VIRTIO_CONFIG_STATUS_DRIVER 0x02
-#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
-#define VIRTIO_CONFIG_STATUS_FAILED 0x80
-
-/*
- * Generate interrupt when the virtqueue ring is
- * completely used, even if we've suppressed them.
- */
-#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
-
-/*
- * The guest should never negotiate this feature; it
- * is used to detect faulty drivers.
- */
-#define VIRTIO_F_BAD_FEATURE (1 << 30)
-
-/*
- * Some VirtIO feature bits (currently bits 28 through 31) are
- * reserved for the transport being used (eg. virtio_ring), the
- * rest are per-device feature bits.
- */
-#define VIRTIO_TRANSPORT_F_START 28
-#define VIRTIO_TRANSPORT_F_END 32
-
-/*
- * Each virtqueue indirect descriptor list must be physically contiguous.
- * To allow us to malloc(9) each list individually, limit the number
- * supported to what will fit in one page. With 4KB pages, this is a limit
- * of 256 descriptors. If there is ever a need for more, we can switch to
- * contigmalloc(9) for the larger allocations, similar to what
- * bus_dmamem_alloc(9) does.
- *
- * Note the sizeof(struct vring_desc) is 16 bytes.
- */
-#define VIRTIO_MAX_INDIRECT ((int) (PAGE_SIZE / 16))
-
-/* The feature bitmap for virtio net */
-#define VIRTIO_NET_F_CSUM 0x00001 /* Host handles pkts w/ partial csum */
-#define VIRTIO_NET_F_GUEST_CSUM 0x00002 /* Guest handles pkts w/ partial csum*/
-#define VIRTIO_NET_F_MAC 0x00020 /* Host has given MAC address. */
-#define VIRTIO_NET_F_GSO 0x00040 /* Host handles pkts w/ any GSO type */
-#define VIRTIO_NET_F_GUEST_TSO4 0x00080 /* Guest can handle TSOv4 in. */
-#define VIRTIO_NET_F_GUEST_TSO6 0x00100 /* Guest can handle TSOv6 in. */
-#define VIRTIO_NET_F_GUEST_ECN 0x00200 /* Guest can handle TSO[6] w/ ECN in.*/
-#define VIRTIO_NET_F_GUEST_UFO 0x00400 /* Guest can handle UFO in. */
-#define VIRTIO_NET_F_HOST_TSO4 0x00800 /* Host can handle TSOv4 in. */
-#define VIRTIO_NET_F_HOST_TSO6 0x01000 /* Host can handle TSOv6 in. */
-#define VIRTIO_NET_F_HOST_ECN 0x02000 /* Host can handle TSO[6] w/ ECN in. */
-#define VIRTIO_NET_F_HOST_UFO 0x04000 /* Host can handle UFO in. */
-#define VIRTIO_NET_F_MRG_RXBUF 0x08000 /* Host can merge receive buffers. */
-#define VIRTIO_NET_F_STATUS 0x10000 /* virtio_net_config.status available*/
-#define VIRTIO_NET_F_CTRL_VQ 0x20000 /* Control channel available */
-#define VIRTIO_NET_F_CTRL_RX 0x40000 /* Control channel RX mode support */
-#define VIRTIO_NET_F_CTRL_VLAN 0x80000 /* Control channel VLAN filtering */
-#define VIRTIO_NET_F_CTRL_RX_EXTRA 0x100000 /* Extra RX mode control support */
-#define VIRTIO_RING_F_INDIRECT_DESC 0x10000000 /* Support for indirect buffer descriptors. */
-/* The guest publishes the used index for which it expects an interrupt
- * at the end of the avail ring. Host should ignore the avail->flags field.
- * The host publishes the avail index for which it expects a kick
- * at the end of the used ring. Guest should ignore the used->flags field.
- */
-#define VIRTIO_RING_F_EVENT_IDX 0x20000000
-
-#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
-
-/*
- * Maximum number of virtqueues per device.
- */
-#define VIRTIO_MAX_VIRTQUEUES 8
-
-struct virtio_hw {
- struct virtqueue *cvq;
- uint32_t io_base;
- uint32_t guest_features;
- uint32_t max_tx_queues;
- uint32_t max_rx_queues;
- uint16_t vtnet_hdr_size;
- uint8_t vlan_strip;
- uint8_t use_msix;
- uint8_t started;
- uint8_t mac_addr[ETHER_ADDR_LEN];
-};
-
-/*
- * This structure is just a reference to read
- * net device specific config space; it just a chodu structure
- *
- */
-struct virtio_net_config {
- /* The config defining mac address (if VIRTIO_NET_F_MAC) */
- uint8_t mac[ETHER_ADDR_LEN];
- /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
- uint16_t status;
- uint16_t max_virtqueue_pairs;
-} __attribute__((packed));
-
-/*
- * The remaining space is defined by each driver as the per-driver
- * configuration space.
- */
-#define VIRTIO_PCI_CONFIG(hw) (((hw)->use_msix) ? 24 : 20)
-
-/*
- * How many bits to shift physical queue address written to QUEUE_PFN.
- * 12 is historical, and due to x86 page size.
- */
-#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
-
-/* The alignment to use between consumer and producer parts of vring. */
-#define VIRTIO_PCI_VRING_ALIGN 4096
-
-#ifdef __FreeBSD__
-
-static inline void
-outb_p(unsigned char data, unsigned int port)
-{
-
- outb(port, (u_char)data);
-}
-
-static inline void
-outw_p(unsigned short data, unsigned int port)
-{
- outw(port, (u_short)data);
-}
-
-static inline void
-outl_p(unsigned int data, unsigned int port)
-{
- outl(port, (u_int)data);
-}
-#endif
-
-#define VIRTIO_PCI_REG_ADDR(hw, reg) \
- (unsigned short)((hw)->io_base + (reg))
-
-#define VIRTIO_READ_REG_1(hw, reg) \
- inb((VIRTIO_PCI_REG_ADDR((hw), (reg))))
-#define VIRTIO_WRITE_REG_1(hw, reg, value) \
- outb_p((unsigned char)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
-
-#define VIRTIO_READ_REG_2(hw, reg) \
- inw((VIRTIO_PCI_REG_ADDR((hw), (reg))))
-#define VIRTIO_WRITE_REG_2(hw, reg, value) \
- outw_p((unsigned short)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
-
-#define VIRTIO_READ_REG_4(hw, reg) \
- inl((VIRTIO_PCI_REG_ADDR((hw), (reg))))
-#define VIRTIO_WRITE_REG_4(hw, reg, value) \
- outl_p((unsigned int)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
-
-static inline int
-vtpci_with_feature(struct virtio_hw *hw, uint32_t feature)
-{
- return (hw->guest_features & feature) != 0;
-}
-
-/*
- * Function declaration from virtio_pci.c
- */
-void vtpci_reset(struct virtio_hw *);
-
-void vtpci_reinit_complete(struct virtio_hw *);
-
-void vtpci_set_status(struct virtio_hw *, uint8_t);
-
-uint32_t vtpci_negotiate_features(struct virtio_hw *, uint32_t);
-
-void vtpci_write_dev_config(struct virtio_hw *, uint64_t, void *, int);
-
-void vtpci_read_dev_config(struct virtio_hw *, uint64_t, void *, int);
-
-uint8_t vtpci_isr(struct virtio_hw *);
-
-uint16_t vtpci_irq_config(struct virtio_hw *, uint16_t);
-
-#endif /* _VIRTIO_PCI_H_ */
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _VIRTIO_RING_H_
-#define _VIRTIO_RING_H_
-
-#include <stdint.h>
-
-#include <rte_common.h>
-
-/* This marks a buffer as continuing via the next field. */
-#define VRING_DESC_F_NEXT 1
-/* This marks a buffer as write-only (otherwise read-only). */
-#define VRING_DESC_F_WRITE 2
-/* This means the buffer contains a list of buffer descriptors. */
-#define VRING_DESC_F_INDIRECT 4
-
-/* The Host uses this in used->flags to advise the Guest: don't kick me
- * when you add a buffer. It's unreliable, so it's simply an
- * optimization. Guest will still kick if it's out of buffers. */
-#define VRING_USED_F_NO_NOTIFY 1
-/* The Guest uses this in avail->flags to advise the Host: don't
- * interrupt me when you consume a buffer. It's unreliable, so it's
- * simply an optimization. */
-#define VRING_AVAIL_F_NO_INTERRUPT 1
-
-/* VirtIO ring descriptors: 16 bytes.
- * These can chain together via "next". */
-struct vring_desc {
- uint64_t addr; /* Address (guest-physical). */
- uint32_t len; /* Length. */
- uint16_t flags; /* The flags as indicated above. */
- uint16_t next; /* We chain unused descriptors via this. */
-};
-
-struct vring_avail {
- uint16_t flags;
- uint16_t idx;
- uint16_t ring[0];
-};
-
-/* id is a 16bit index. uint32_t is used here for ids for padding reasons. */
-struct vring_used_elem {
- /* Index of start of used descriptor chain. */
- uint32_t id;
- /* Total length of the descriptor chain which was written to. */
- uint32_t len;
-};
-
-struct vring_used {
- uint16_t flags;
- uint16_t idx;
- struct vring_used_elem ring[0];
-};
-
-struct vring {
- unsigned int num;
- struct vring_desc *desc;
- struct vring_avail *avail;
- struct vring_used *used;
-};
-
-/* The standard layout for the ring is a continuous chunk of memory which
- * looks like this. We assume num is a power of 2.
- *
- * struct vring {
- * // The actual descriptors (16 bytes each)
- * struct vring_desc desc[num];
- *
- * // A ring of available descriptor heads with free-running index.
- * __u16 avail_flags;
- * __u16 avail_idx;
- * __u16 available[num];
- * __u16 used_event_idx;
- *
- * // Padding to the next align boundary.
- * char pad[];
- *
- * // A ring of used descriptor heads with free-running index.
- * __u16 used_flags;
- * __u16 used_idx;
- * struct vring_used_elem used[num];
- * __u16 avail_event_idx;
- * };
- *
- * NOTE: for VirtIO PCI, align is 4096.
- */
-
-/*
- * We publish the used event index at the end of the available ring, and vice
- * versa. They are at the end for backwards compatibility.
- */
-#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
-#define vring_avail_event(vr) (*(uint16_t *)&(vr)->used->ring[(vr)->num])
-
-static inline int
-vring_size(unsigned int num, unsigned long align)
-{
- int size;
-
- size = num * sizeof(struct vring_desc);
- size += sizeof(struct vring_avail) + (num * sizeof(uint16_t));
- size = RTE_ALIGN_CEIL(size, align);
- size += sizeof(struct vring_used) +
- (num * sizeof(struct vring_used_elem));
- return size;
-}
-
-static inline void
-vring_init(struct vring *vr, unsigned int num, uint8_t *p,
- unsigned long align)
-{
- vr->num = num;
- vr->desc = (struct vring_desc *) p;
- vr->avail = (struct vring_avail *) (p +
- num * sizeof(struct vring_desc));
- vr->used = (void *)
- RTE_ALIGN_CEIL((uintptr_t)(&vr->avail->ring[num]), align);
-}
-
-/*
- * The following is used with VIRTIO_RING_F_EVENT_IDX.
- * Assuming a given event_idx value from the other size, if we have
- * just incremented index from old to new_idx, should we trigger an
- * event?
- */
-static inline int
-vring_need_event(uint16_t event_idx, uint16_t new_idx, uint16_t old)
-{
- return (uint16_t)(new_idx - event_idx - 1) < (uint16_t)(new_idx - old);
-}
-
-#endif /* _VIRTIO_RING_H_ */
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-#include <rte_cycles.h>
-#include <rte_memory.h>
-#include <rte_memzone.h>
-#include <rte_branch_prediction.h>
-#include <rte_mempool.h>
-#include <rte_malloc.h>
-#include <rte_mbuf.h>
-#include <rte_ether.h>
-#include <rte_ethdev.h>
-#include <rte_prefetch.h>
-#include <rte_string_fns.h>
-#include <rte_errno.h>
-#include <rte_byteorder.h>
-
-#include "virtio_logs.h"
-#include "virtio_ethdev.h"
-#include "virtqueue.h"
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
-#define VIRTIO_DUMP_PACKET(m, len) rte_pktmbuf_dump(stdout, m, len)
-#else
-#define VIRTIO_DUMP_PACKET(m, len) do { } while (0)
-#endif
-
-static void
-vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
-{
- struct vring_desc *dp, *dp_tail;
- struct vq_desc_extra *dxp;
- uint16_t desc_idx_last = desc_idx;
-
- dp = &vq->vq_ring.desc[desc_idx];
- dxp = &vq->vq_descx[desc_idx];
- vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs);
- if ((dp->flags & VRING_DESC_F_INDIRECT) == 0) {
- while (dp->flags & VRING_DESC_F_NEXT) {
- desc_idx_last = dp->next;
- dp = &vq->vq_ring.desc[dp->next];
- }
- }
- dxp->ndescs = 0;
-
- /*
- * We must append the existing free chain, if any, to the end of
- * newly freed chain. If the virtqueue was completely used, then
- * head would be VQ_RING_DESC_CHAIN_END (ASSERTed above).
- */
- if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END) {
- vq->vq_desc_head_idx = desc_idx;
- } else {
- dp_tail = &vq->vq_ring.desc[vq->vq_desc_tail_idx];
- dp_tail->next = desc_idx;
- }
-
- vq->vq_desc_tail_idx = desc_idx_last;
- dp->next = VQ_RING_DESC_CHAIN_END;
-}
-
-static uint16_t
-virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts,
- uint32_t *len, uint16_t num)
-{
- struct vring_used_elem *uep;
- struct rte_mbuf *cookie;
- uint16_t used_idx, desc_idx;
- uint16_t i;
-
- /* Caller does the check */
- for (i = 0; i < num ; i++) {
- used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
- uep = &vq->vq_ring.used->ring[used_idx];
- desc_idx = (uint16_t) uep->id;
- len[i] = uep->len;
- cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie;
-
- if (unlikely(cookie == NULL)) {
- PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u\n",
- vq->vq_used_cons_idx);
- break;
- }
-
- rte_prefetch0(cookie);
- rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
- rx_pkts[i] = cookie;
- vq->vq_used_cons_idx++;
- vq_ring_free_chain(vq, desc_idx);
- vq->vq_descx[desc_idx].cookie = NULL;
- }
-
- return i;
-}
-
-#ifndef DEFAULT_TX_FREE_THRESH
-#define DEFAULT_TX_FREE_THRESH 32
-#endif
-
-/* Cleanup from completed transmits. */
-static void
-virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
-{
- uint16_t i, used_idx, desc_idx;
- for (i = 0; i < num; i++) {
- struct vring_used_elem *uep;
- struct vq_desc_extra *dxp;
-
- used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
- uep = &vq->vq_ring.used->ring[used_idx];
-
- desc_idx = (uint16_t) uep->id;
- dxp = &vq->vq_descx[desc_idx];
- vq->vq_used_cons_idx++;
- vq_ring_free_chain(vq, desc_idx);
-
- if (dxp->cookie != NULL) {
- rte_pktmbuf_free(dxp->cookie);
- dxp->cookie = NULL;
- }
- }
-}
-
-
-static inline int
-virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf *cookie)
-{
- struct vq_desc_extra *dxp;
- struct virtio_hw *hw = vq->hw;
- struct vring_desc *start_dp;
- uint16_t needed = 1;
- uint16_t head_idx, idx;
-
- if (unlikely(vq->vq_free_cnt == 0))
- return -ENOSPC;
- if (unlikely(vq->vq_free_cnt < needed))
- return -EMSGSIZE;
-
- head_idx = vq->vq_desc_head_idx;
- if (unlikely(head_idx >= vq->vq_nentries))
- return -EFAULT;
-
- idx = head_idx;
- dxp = &vq->vq_descx[idx];
- dxp->cookie = (void *)cookie;
- dxp->ndescs = needed;
-
- start_dp = vq->vq_ring.desc;
- start_dp[idx].addr =
- (uint64_t)(cookie->buf_physaddr + RTE_PKTMBUF_HEADROOM
- - hw->vtnet_hdr_size);
- start_dp[idx].len =
- cookie->buf_len - RTE_PKTMBUF_HEADROOM + hw->vtnet_hdr_size;
- start_dp[idx].flags = VRING_DESC_F_WRITE;
- idx = start_dp[idx].next;
- vq->vq_desc_head_idx = idx;
- if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
- vq->vq_desc_tail_idx = idx;
- vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
- vq_update_avail_ring(vq, head_idx);
-
- return 0;
-}
-
-static int
-virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
-{
- struct vq_desc_extra *dxp;
- struct vring_desc *start_dp;
- uint16_t seg_num = cookie->nb_segs;
- uint16_t needed = 1 + seg_num;
- uint16_t head_idx, idx;
- uint16_t head_size = txvq->hw->vtnet_hdr_size;
-
- if (unlikely(txvq->vq_free_cnt == 0))
- return -ENOSPC;
- if (unlikely(txvq->vq_free_cnt < needed))
- return -EMSGSIZE;
- head_idx = txvq->vq_desc_head_idx;
- if (unlikely(head_idx >= txvq->vq_nentries))
- return -EFAULT;
-
- idx = head_idx;
- dxp = &txvq->vq_descx[idx];
- dxp->cookie = (void *)cookie;
- dxp->ndescs = needed;
-
- start_dp = txvq->vq_ring.desc;
- start_dp[idx].addr =
- txvq->virtio_net_hdr_mem + idx * head_size;
- start_dp[idx].len = (uint32_t)head_size;
- start_dp[idx].flags = VRING_DESC_F_NEXT;
-
- for (; ((seg_num > 0) && (cookie != NULL)); seg_num--) {
- idx = start_dp[idx].next;
- start_dp[idx].addr = RTE_MBUF_DATA_DMA_ADDR(cookie);
- start_dp[idx].len = cookie->data_len;
- start_dp[idx].flags = VRING_DESC_F_NEXT;
- cookie = cookie->next;
- }
-
- start_dp[idx].flags &= ~VRING_DESC_F_NEXT;
- idx = start_dp[idx].next;
- txvq->vq_desc_head_idx = idx;
- if (txvq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
- txvq->vq_desc_tail_idx = idx;
- txvq->vq_free_cnt = (uint16_t)(txvq->vq_free_cnt - needed);
- vq_update_avail_ring(txvq, head_idx);
-
- return 0;
-}
-
-static inline struct rte_mbuf *
-rte_rxmbuf_alloc(struct rte_mempool *mp)
-{
- struct rte_mbuf *m;
-
- m = __rte_mbuf_raw_alloc(mp);
- __rte_mbuf_sanity_check_raw(m, 0);
-
- return m;
-}
-
-static void
-virtio_dev_vring_start(struct virtqueue *vq, int queue_type)
-{
- struct rte_mbuf *m;
- int i, nbufs, error, size = vq->vq_nentries;
- struct vring *vr = &vq->vq_ring;
- uint8_t *ring_mem = vq->vq_ring_virt_mem;
-
- PMD_INIT_FUNC_TRACE();
-
- /*
- * Reinitialise since virtio port might have been stopped and restarted
- */
- memset(vq->vq_ring_virt_mem, 0, vq->vq_ring_size);
- vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
- vq->vq_used_cons_idx = 0;
- vq->vq_desc_head_idx = 0;
- vq->vq_avail_idx = 0;
- vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
- vq->vq_free_cnt = vq->vq_nentries;
- memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
-
- /* Chain all the descriptors in the ring with an END */
- for (i = 0; i < size - 1; i++)
- vr->desc[i].next = (uint16_t)(i + 1);
- vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
-
- /*
- * Disable device(host) interrupting guest
- */
- virtqueue_disable_intr(vq);
-
- /* Only rx virtqueue needs mbufs to be allocated at initialization */
- if (queue_type == VTNET_RQ) {
- if (vq->mpool == NULL)
- rte_exit(EXIT_FAILURE,
- "Cannot allocate initial mbufs for rx virtqueue");
-
- /* Allocate blank mbufs for the each rx descriptor */
- nbufs = 0;
- error = ENOSPC;
- while (!virtqueue_full(vq)) {
- m = rte_rxmbuf_alloc(vq->mpool);
- if (m == NULL)
- break;
-
- /******************************************
- * Enqueue allocated buffers *
- *******************************************/
- error = virtqueue_enqueue_recv_refill(vq, m);
-
- if (error) {
- rte_pktmbuf_free(m);
- break;
- }
- nbufs++;
- }
-
- vq_update_avail_idx(vq);
-
- PMD_INIT_LOG(DEBUG, "Allocated %d bufs", nbufs);
-
- VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_SEL,
- vq->vq_queue_index);
- VIRTIO_WRITE_REG_4(vq->hw, VIRTIO_PCI_QUEUE_PFN,
- vq->mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
- } else if (queue_type == VTNET_TQ) {
- VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_SEL,
- vq->vq_queue_index);
- VIRTIO_WRITE_REG_4(vq->hw, VIRTIO_PCI_QUEUE_PFN,
- vq->mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
- } else {
- VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_SEL,
- vq->vq_queue_index);
- VIRTIO_WRITE_REG_4(vq->hw, VIRTIO_PCI_QUEUE_PFN,
- vq->mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
- }
-}
-
-void
-virtio_dev_cq_start(struct rte_eth_dev *dev)
-{
- struct virtio_hw *hw = dev->data->dev_private;
-
- if (hw->cvq) {
- virtio_dev_vring_start(hw->cvq, VTNET_CQ);
- VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq);
- }
-}
-
-void
-virtio_dev_rxtx_start(struct rte_eth_dev *dev)
-{
- /*
- * Start receive and transmit vrings
- * - Setup vring structure for all queues
- * - Initialize descriptor for the rx vring
- * - Allocate blank mbufs for the each rx descriptor
- *
- */
- int i;
-
- PMD_INIT_FUNC_TRACE();
-
- /* Start rx vring. */
- for (i = 0; i < dev->data->nb_rx_queues; i++) {
- virtio_dev_vring_start(dev->data->rx_queues[i], VTNET_RQ);
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
- }
-
- /* Start tx vring. */
- for (i = 0; i < dev->data->nb_tx_queues; i++) {
- virtio_dev_vring_start(dev->data->tx_queues[i], VTNET_TQ);
- VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
- }
-}
-
-int
-virtio_dev_rx_queue_setup(struct rte_eth_dev *dev,
- uint16_t queue_idx,
- uint16_t nb_desc,
- unsigned int socket_id,
- __rte_unused const struct rte_eth_rxconf *rx_conf,
- struct rte_mempool *mp)
-{
- uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX;
- struct virtqueue *vq;
- int ret;
-
- PMD_INIT_FUNC_TRACE();
- ret = virtio_dev_queue_setup(dev, VTNET_RQ, queue_idx, vtpci_queue_idx,
- nb_desc, socket_id, &vq);
- if (ret < 0) {
- PMD_INIT_LOG(ERR, "tvq initialization failed");
- return ret;
- }
-
- /* Create mempool for rx mbuf allocation */
- vq->mpool = mp;
-
- dev->data->rx_queues[queue_idx] = vq;
- return 0;
-}
-
-/*
- * struct rte_eth_dev *dev: Used to update dev
- * uint16_t nb_desc: Defaults to values read from config space
- * unsigned int socket_id: Used to allocate memzone
- * const struct rte_eth_txconf *tx_conf: Used to setup tx engine
- * uint16_t queue_idx: Just used as an index in dev txq list
- */
-int
-virtio_dev_tx_queue_setup(struct rte_eth_dev *dev,
- uint16_t queue_idx,
- uint16_t nb_desc,
- unsigned int socket_id,
- const struct rte_eth_txconf *tx_conf)
-{
- uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX;
- struct virtqueue *vq;
- uint16_t tx_free_thresh;
- int ret;
-
- PMD_INIT_FUNC_TRACE();
-
- if ((tx_conf->txq_flags & ETH_TXQ_FLAGS_NOXSUMS)
- != ETH_TXQ_FLAGS_NOXSUMS) {
- PMD_INIT_LOG(ERR, "TX checksum offload not supported\n");
- return -EINVAL;
- }
-
- ret = virtio_dev_queue_setup(dev, VTNET_TQ, queue_idx, vtpci_queue_idx,
- nb_desc, socket_id, &vq);
- if (ret < 0) {
- PMD_INIT_LOG(ERR, "rvq initialization failed");
- return ret;
- }
-
- tx_free_thresh = tx_conf->tx_free_thresh;
- if (tx_free_thresh == 0)
- tx_free_thresh =
- RTE_MIN(vq->vq_nentries / 4, DEFAULT_TX_FREE_THRESH);
-
- if (tx_free_thresh >= (vq->vq_nentries - 3)) {
- RTE_LOG(ERR, PMD, "tx_free_thresh must be less than the "
- "number of TX entries minus 3 (%u)."
- " (tx_free_thresh=%u port=%u queue=%u)\n",
- vq->vq_nentries - 3,
- tx_free_thresh, dev->data->port_id, queue_idx);
- return -EINVAL;
- }
-
- vq->vq_free_thresh = tx_free_thresh;
-
- dev->data->tx_queues[queue_idx] = vq;
- return 0;
-}
-
-static void
-virtio_discard_rxbuf(struct virtqueue *vq, struct rte_mbuf *m)
-{
- int error;
- /*
- * Requeue the discarded mbuf. This should always be
- * successful since it was just dequeued.
- */
- error = virtqueue_enqueue_recv_refill(vq, m);
- if (unlikely(error)) {
- RTE_LOG(ERR, PMD, "cannot requeue discarded mbuf");
- rte_pktmbuf_free(m);
- }
-}
-
-#define VIRTIO_MBUF_BURST_SZ 64
-#define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc))
-uint16_t
-virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
-{
- struct virtqueue *rxvq = rx_queue;
- struct virtio_hw *hw;
- struct rte_mbuf *rxm, *new_mbuf;
- uint16_t nb_used, num, nb_rx;
- uint32_t len[VIRTIO_MBUF_BURST_SZ];
- struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
- int error;
- uint32_t i, nb_enqueued;
- const uint32_t hdr_size = sizeof(struct virtio_net_hdr);
-
- nb_used = VIRTQUEUE_NUSED(rxvq);
-
- virtio_rmb();
-
- num = (uint16_t)(likely(nb_used <= nb_pkts) ? nb_used : nb_pkts);
- num = (uint16_t)(likely(num <= VIRTIO_MBUF_BURST_SZ) ? num : VIRTIO_MBUF_BURST_SZ);
- if (likely(num > DESC_PER_CACHELINE))
- num = num - ((rxvq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
-
- if (num == 0)
- return 0;
-
- num = virtqueue_dequeue_burst_rx(rxvq, rcv_pkts, len, num);
- PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num);
-
- hw = rxvq->hw;
- nb_rx = 0;
- nb_enqueued = 0;
-
- for (i = 0; i < num ; i++) {
- rxm = rcv_pkts[i];
-
- PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
-
- if (unlikely(len[i] < hdr_size + ETHER_HDR_LEN)) {
- PMD_RX_LOG(ERR, "Packet drop");
- nb_enqueued++;
- virtio_discard_rxbuf(rxvq, rxm);
- rxvq->errors++;
- continue;
- }
-
- rxm->port = rxvq->port_id;
- rxm->data_off = RTE_PKTMBUF_HEADROOM;
-
- rxm->nb_segs = 1;
- rxm->next = NULL;
- rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
- rxm->data_len = (uint16_t)(len[i] - hdr_size);
-
- if (hw->vlan_strip)
- rte_vlan_strip(rxm);
-
- VIRTIO_DUMP_PACKET(rxm, rxm->data_len);
-
- rx_pkts[nb_rx++] = rxm;
- rxvq->bytes += rx_pkts[nb_rx - 1]->pkt_len;
- }
-
- rxvq->packets += nb_rx;
-
- /* Allocate new mbuf for the used descriptor */
- error = ENOSPC;
- while (likely(!virtqueue_full(rxvq))) {
- new_mbuf = rte_rxmbuf_alloc(rxvq->mpool);
- if (unlikely(new_mbuf == NULL)) {
- struct rte_eth_dev *dev
- = &rte_eth_devices[rxvq->port_id];
- dev->data->rx_mbuf_alloc_failed++;
- break;
- }
- error = virtqueue_enqueue_recv_refill(rxvq, new_mbuf);
- if (unlikely(error)) {
- rte_pktmbuf_free(new_mbuf);
- break;
- }
- nb_enqueued++;
- }
-
- if (likely(nb_enqueued)) {
- vq_update_avail_idx(rxvq);
-
- if (unlikely(virtqueue_kick_prepare(rxvq))) {
- virtqueue_notify(rxvq);
- PMD_RX_LOG(DEBUG, "Notified\n");
- }
- }
-
- return nb_rx;
-}
-
-uint16_t
-virtio_recv_mergeable_pkts(void *rx_queue,
- struct rte_mbuf **rx_pkts,
- uint16_t nb_pkts)
-{
- struct virtqueue *rxvq = rx_queue;
- struct virtio_hw *hw;
- struct rte_mbuf *rxm, *new_mbuf;
- uint16_t nb_used, num, nb_rx;
- uint32_t len[VIRTIO_MBUF_BURST_SZ];
- struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
- struct rte_mbuf *prev;
- int error;
- uint32_t i, nb_enqueued;
- uint32_t seg_num;
- uint16_t extra_idx;
- uint32_t seg_res;
- const uint32_t hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
-
- nb_used = VIRTQUEUE_NUSED(rxvq);
-
- virtio_rmb();
-
- if (nb_used == 0)
- return 0;
-
- PMD_RX_LOG(DEBUG, "used:%d\n", nb_used);
-
- hw = rxvq->hw;
- nb_rx = 0;
- i = 0;
- nb_enqueued = 0;
- seg_num = 0;
- extra_idx = 0;
- seg_res = 0;
-
- while (i < nb_used) {
- struct virtio_net_hdr_mrg_rxbuf *header;
-
- if (nb_rx == nb_pkts)
- break;
-
- num = virtqueue_dequeue_burst_rx(rxvq, rcv_pkts, len, 1);
- if (num != 1)
- continue;
-
- i++;
-
- PMD_RX_LOG(DEBUG, "dequeue:%d\n", num);
- PMD_RX_LOG(DEBUG, "packet len:%d\n", len[0]);
-
- rxm = rcv_pkts[0];
-
- if (unlikely(len[0] < hdr_size + ETHER_HDR_LEN)) {
- PMD_RX_LOG(ERR, "Packet drop\n");
- nb_enqueued++;
- virtio_discard_rxbuf(rxvq, rxm);
- rxvq->errors++;
- continue;
- }
-
- header = (struct virtio_net_hdr_mrg_rxbuf *)((char *)rxm->buf_addr +
- RTE_PKTMBUF_HEADROOM - hdr_size);
- seg_num = header->num_buffers;
-
- if (seg_num == 0)
- seg_num = 1;
-
- rxm->data_off = RTE_PKTMBUF_HEADROOM;
- rxm->nb_segs = seg_num;
- rxm->next = NULL;
- rxm->pkt_len = (uint32_t)(len[0] - hdr_size);
- rxm->data_len = (uint16_t)(len[0] - hdr_size);
-
- rxm->port = rxvq->port_id;
- rx_pkts[nb_rx] = rxm;
- prev = rxm;
-
- seg_res = seg_num - 1;
-
- while (seg_res != 0) {
- /*
- * Get extra segments for current uncompleted packet.
- */
- uint16_t rcv_cnt =
- RTE_MIN(seg_res, RTE_DIM(rcv_pkts));
- if (likely(VIRTQUEUE_NUSED(rxvq) >= rcv_cnt)) {
- uint32_t rx_num =
- virtqueue_dequeue_burst_rx(rxvq,
- rcv_pkts, len, rcv_cnt);
- i += rx_num;
- rcv_cnt = rx_num;
- } else {
- PMD_RX_LOG(ERR,
- "No enough segments for packet.\n");
- nb_enqueued++;
- virtio_discard_rxbuf(rxvq, rxm);
- rxvq->errors++;
- break;
- }
-
- extra_idx = 0;
-
- while (extra_idx < rcv_cnt) {
- rxm = rcv_pkts[extra_idx];
-
- rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
- rxm->next = NULL;
- rxm->pkt_len = (uint32_t)(len[extra_idx]);
- rxm->data_len = (uint16_t)(len[extra_idx]);
-
- if (prev)
- prev->next = rxm;
-
- prev = rxm;
- rx_pkts[nb_rx]->pkt_len += rxm->pkt_len;
- extra_idx++;
- };
- seg_res -= rcv_cnt;
- }
-
- if (hw->vlan_strip)
- rte_vlan_strip(rx_pkts[nb_rx]);
-
- VIRTIO_DUMP_PACKET(rx_pkts[nb_rx],
- rx_pkts[nb_rx]->data_len);
-
- rxvq->bytes += rx_pkts[nb_rx]->pkt_len;
- nb_rx++;
- }
-
- rxvq->packets += nb_rx;
-
- /* Allocate new mbuf for the used descriptor */
- error = ENOSPC;
- while (likely(!virtqueue_full(rxvq))) {
- new_mbuf = rte_rxmbuf_alloc(rxvq->mpool);
- if (unlikely(new_mbuf == NULL)) {
- struct rte_eth_dev *dev
- = &rte_eth_devices[rxvq->port_id];
- dev->data->rx_mbuf_alloc_failed++;
- break;
- }
- error = virtqueue_enqueue_recv_refill(rxvq, new_mbuf);
- if (unlikely(error)) {
- rte_pktmbuf_free(new_mbuf);
- break;
- }
- nb_enqueued++;
- }
-
- if (likely(nb_enqueued)) {
- vq_update_avail_idx(rxvq);
-
- if (unlikely(virtqueue_kick_prepare(rxvq))) {
- virtqueue_notify(rxvq);
- PMD_RX_LOG(DEBUG, "Notified");
- }
- }
-
- return nb_rx;
-}
-
-uint16_t
-virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
-{
- struct virtqueue *txvq = tx_queue;
- struct rte_mbuf *txm;
- uint16_t nb_used, nb_tx;
- int error;
-
- if (unlikely(nb_pkts < 1))
- return nb_pkts;
-
- PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
- nb_used = VIRTQUEUE_NUSED(txvq);
-
- virtio_rmb();
- if (likely(nb_used > txvq->vq_free_thresh))
- virtio_xmit_cleanup(txvq, nb_used);
-
- nb_tx = 0;
-
- while (nb_tx < nb_pkts) {
- /* Need one more descriptor for virtio header. */
- int need = tx_pkts[nb_tx]->nb_segs - txvq->vq_free_cnt + 1;
-
- /*Positive value indicates it need free vring descriptors */
- if (unlikely(need > 0)) {
- nb_used = VIRTQUEUE_NUSED(txvq);
- virtio_rmb();
- need = RTE_MIN(need, (int)nb_used);
-
- virtio_xmit_cleanup(txvq, need);
- need = (int)tx_pkts[nb_tx]->nb_segs -
- txvq->vq_free_cnt + 1;
- }
-
- /*
- * Zero or negative value indicates it has enough free
- * descriptors to use for transmitting.
- */
- if (likely(need <= 0)) {
- txm = tx_pkts[nb_tx];
-
- /* Do VLAN tag insertion */
- if (unlikely(txm->ol_flags & PKT_TX_VLAN_PKT)) {
- error = rte_vlan_insert(&txm);
- if (unlikely(error)) {
- rte_pktmbuf_free(txm);
- ++nb_tx;
- continue;
- }
- }
-
- /* Enqueue Packet buffers */
- error = virtqueue_enqueue_xmit(txvq, txm);
- if (unlikely(error)) {
- if (error == ENOSPC)
- PMD_TX_LOG(ERR, "virtqueue_enqueue Free count = 0");
- else if (error == EMSGSIZE)
- PMD_TX_LOG(ERR, "virtqueue_enqueue Free count < 1");
- else
- PMD_TX_LOG(ERR, "virtqueue_enqueue error: %d", error);
- break;
- }
- nb_tx++;
- txvq->bytes += txm->pkt_len;
- } else {
- PMD_TX_LOG(ERR, "No free tx descriptors to transmit");
- break;
- }
- }
-
- txvq->packets += nb_tx;
-
- if (likely(nb_tx)) {
- vq_update_avail_idx(txvq);
-
- if (unlikely(virtqueue_kick_prepare(txvq))) {
- virtqueue_notify(txvq);
- PMD_TX_LOG(DEBUG, "Notified backend after xmit");
- }
- }
-
- return nb_tx;
-}
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#include <stdint.h>
-
-#include <rte_mbuf.h>
-
-#include "virtqueue.h"
-#include "virtio_logs.h"
-#include "virtio_pci.h"
-
-void
-virtqueue_disable_intr(struct virtqueue *vq)
-{
- /*
- * Set VRING_AVAIL_F_NO_INTERRUPT to hint host
- * not to interrupt when it consumes packets
- * Note: this is only considered a hint to the host
- */
- vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
-}
-
-/*
- * Two types of mbuf to be cleaned:
- * 1) mbuf that has been consumed by backend but not used by virtio.
- * 2) mbuf that hasn't been consued by backend.
- */
-struct rte_mbuf *
-virtqueue_detatch_unused(struct virtqueue *vq)
-{
- struct rte_mbuf *cookie;
- int idx;
-
- for (idx = 0; idx < vq->vq_nentries; idx++) {
- if ((cookie = vq->vq_descx[idx].cookie) != NULL) {
- vq->vq_descx[idx].cookie = NULL;
- return cookie;
- }
- }
- return NULL;
-}
+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * 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 Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _VIRTQUEUE_H_
-#define _VIRTQUEUE_H_
-
-#include <stdint.h>
-
-#include <rte_atomic.h>
-#include <rte_memory.h>
-#include <rte_memzone.h>
-#include <rte_mempool.h>
-
-#include "virtio_pci.h"
-#include "virtio_ring.h"
-#include "virtio_logs.h"
-
-struct rte_mbuf;
-
-/*
- * Per virtio_config.h in Linux.
- * For virtio_pci on SMP, we don't need to order with respect to MMIO
- * accesses through relaxed memory I/O windows, so smp_mb() et al are
- * sufficient.
- *
- * This driver is for virtio_pci on SMP and therefore can assume
- * weaker (compiler barriers)
- */
-#define virtio_mb() rte_mb()
-#define virtio_rmb() rte_compiler_barrier()
-#define virtio_wmb() rte_compiler_barrier()
-
-#ifdef RTE_PMD_PACKET_PREFETCH
-#define rte_packet_prefetch(p) rte_prefetch1(p)
-#else
-#define rte_packet_prefetch(p) do {} while(0)
-#endif
-
-#define VIRTQUEUE_MAX_NAME_SZ 32
-
-#define RTE_MBUF_DATA_DMA_ADDR(mb) \
- (uint64_t) ((mb)->buf_physaddr + (mb)->data_off)
-
-#define VTNET_SQ_RQ_QUEUE_IDX 0
-#define VTNET_SQ_TQ_QUEUE_IDX 1
-#define VTNET_SQ_CQ_QUEUE_IDX 2
-
-enum { VTNET_RQ = 0, VTNET_TQ = 1, VTNET_CQ = 2 };
-/**
- * The maximum virtqueue size is 2^15. Use that value as the end of
- * descriptor chain terminator since it will never be a valid index
- * in the descriptor table. This is used to verify we are correctly
- * handling vq_free_cnt.
- */
-#define VQ_RING_DESC_CHAIN_END 32768
-
-/**
- * Control the RX mode, ie. promiscuous, allmulti, etc...
- * All commands require an "out" sg entry containing a 1 byte
- * state value, zero = disable, non-zero = enable. Commands
- * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
- * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
- */
-#define VIRTIO_NET_CTRL_RX 0
-#define VIRTIO_NET_CTRL_RX_PROMISC 0
-#define VIRTIO_NET_CTRL_RX_ALLMULTI 1
-#define VIRTIO_NET_CTRL_RX_ALLUNI 2
-#define VIRTIO_NET_CTRL_RX_NOMULTI 3
-#define VIRTIO_NET_CTRL_RX_NOUNI 4
-#define VIRTIO_NET_CTRL_RX_NOBCAST 5
-
-/**
- * Control the MAC
- *
- * The MAC filter table is managed by the hypervisor, the guest should
- * assume the size is infinite. Filtering should be considered
- * non-perfect, ie. based on hypervisor resources, the guest may
- * received packets from sources not specified in the filter list.
- *
- * In addition to the class/cmd header, the TABLE_SET command requires
- * two out scatterlists. Each contains a 4 byte count of entries followed
- * by a concatenated byte stream of the ETH_ALEN MAC addresses. The
- * first sg list contains unicast addresses, the second is for multicast.
- * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
- * is available.
- *
- * The ADDR_SET command requests one out scatterlist, it contains a
- * 6 bytes MAC address. This functionality is present if the
- * VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
- */
-struct virtio_net_ctrl_mac {
- uint32_t entries;
- uint8_t macs[][ETHER_ADDR_LEN];
-} __attribute__((__packed__));
-
-#define VIRTIO_NET_CTRL_MAC 1
- #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
- #define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
-
-/**
- * Control VLAN filtering
- *
- * The VLAN filter table is controlled via a simple ADD/DEL interface.
- * VLAN IDs not added may be filtered by the hypervisor. Del is the
- * opposite of add. Both commands expect an out entry containing a 2
- * byte VLAN ID. VLAN filtering is available with the
- * VIRTIO_NET_F_CTRL_VLAN feature bit.
- */
-#define VIRTIO_NET_CTRL_VLAN 2
-#define VIRTIO_NET_CTRL_VLAN_ADD 0
-#define VIRTIO_NET_CTRL_VLAN_DEL 1
-
-struct virtio_net_ctrl_hdr {
- uint8_t class;
- uint8_t cmd;
-} __attribute__((packed));
-
-typedef uint8_t virtio_net_ctrl_ack;
-
-#define VIRTIO_NET_OK 0
-#define VIRTIO_NET_ERR 1
-
-#define VIRTIO_MAX_CTRL_DATA 2048
-
-struct virtio_pmd_ctrl {
- struct virtio_net_ctrl_hdr hdr;
- virtio_net_ctrl_ack status;
- uint8_t data[VIRTIO_MAX_CTRL_DATA];
-};
-
-struct virtqueue {
- struct virtio_hw *hw; /**< virtio_hw structure pointer. */
- const struct rte_memzone *mz; /**< mem zone to populate RX ring. */
- const struct rte_memzone *virtio_net_hdr_mz; /**< memzone to populate hdr. */
- struct rte_mempool *mpool; /**< mempool for mbuf allocation */
- uint16_t queue_id; /**< DPDK queue index. */
- uint8_t port_id; /**< Device port identifier. */
- uint16_t vq_queue_index; /**< PCI queue index */
-
- void *vq_ring_virt_mem; /**< linear address of vring*/
- unsigned int vq_ring_size;
- phys_addr_t vq_ring_mem; /**< physical address of vring */
-
- struct vring vq_ring; /**< vring keeping desc, used and avail */
- uint16_t vq_free_cnt; /**< num of desc available */
- uint16_t vq_nentries; /**< vring desc numbers */
- uint16_t vq_free_thresh; /**< free threshold */
- /**
- * Head of the free chain in the descriptor table. If
- * there are no free descriptors, this will be set to
- * VQ_RING_DESC_CHAIN_END.
- */
- uint16_t vq_desc_head_idx;
- uint16_t vq_desc_tail_idx;
- /**
- * Last consumed descriptor in the used table,
- * trails vq_ring.used->idx.
- */
- uint16_t vq_used_cons_idx;
- uint16_t vq_avail_idx;
- phys_addr_t virtio_net_hdr_mem; /**< hdr for each xmit packet */
-
- /* Statistics */
- uint64_t packets;
- uint64_t bytes;
- uint64_t errors;
-
- struct vq_desc_extra {
- void *cookie;
- uint16_t ndescs;
- } vq_descx[0];
-};
-
-/* If multiqueue is provided by host, then we suppport it. */
-#ifndef VIRTIO_NET_F_MQ
-/* Device supports Receive Flow Steering */
-#define VIRTIO_NET_F_MQ 0x400000
-#define VIRTIO_NET_CTRL_MQ 4
-#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
-#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
-#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
-#endif
-#ifndef VIRTIO_NET_F_CTRL_MAC_ADDR
-#define VIRTIO_NET_F_CTRL_MAC_ADDR 0x800000
-#define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
-#endif
-
-/**
- * This is the first element of the scatter-gather list. If you don't
- * specify GSO or CSUM features, you can simply ignore the header.
- */
-struct virtio_net_hdr {
-#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /**< Use csum_start,csum_offset*/
- uint8_t flags;
-#define VIRTIO_NET_HDR_GSO_NONE 0 /**< Not a GSO frame */
-#define VIRTIO_NET_HDR_GSO_TCPV4 1 /**< GSO frame, IPv4 TCP (TSO) */
-#define VIRTIO_NET_HDR_GSO_UDP 3 /**< GSO frame, IPv4 UDP (UFO) */
-#define VIRTIO_NET_HDR_GSO_TCPV6 4 /**< GSO frame, IPv6 TCP */
-#define VIRTIO_NET_HDR_GSO_ECN 0x80 /**< TCP has ECN set */
- uint8_t gso_type;
- uint16_t hdr_len; /**< Ethernet + IP + tcp/udp hdrs */
- uint16_t gso_size; /**< Bytes to append to hdr_len per frame */
- uint16_t csum_start; /**< Position to start checksumming from */
- uint16_t csum_offset; /**< Offset after that to place checksum */
-};
-
-/**
- * This is the version of the header to use when the MRG_RXBUF
- * feature has been negotiated.
- */
-struct virtio_net_hdr_mrg_rxbuf {
- struct virtio_net_hdr hdr;
- uint16_t num_buffers; /**< Number of merged rx buffers */
-};
-
-/**
- * Tell the backend not to interrupt us.
- */
-void virtqueue_disable_intr(struct virtqueue *vq);
-/**
- * Dump virtqueue internal structures, for debug purpose only.
- */
-void virtqueue_dump(struct virtqueue *vq);
-/**
- * Get all mbufs to be freed.
- */
-struct rte_mbuf *virtqueue_detatch_unused(struct virtqueue *vq);
-
-static inline int
-virtqueue_full(const struct virtqueue *vq)
-{
- return vq->vq_free_cnt == 0;
-}
-
-#define VIRTQUEUE_NUSED(vq) ((uint16_t)((vq)->vq_ring.used->idx - (vq)->vq_used_cons_idx))
-
-static inline void
-vq_update_avail_idx(struct virtqueue *vq)
-{
- virtio_wmb();
- vq->vq_ring.avail->idx = vq->vq_avail_idx;
-}
-
-static inline void
-vq_update_avail_ring(struct virtqueue *vq, uint16_t desc_idx)
-{
- uint16_t avail_idx;
- /*
- * Place the head of the descriptor chain into the next slot and make
- * it usable to the host. The chain is made available now rather than
- * deferring to virtqueue_notify() in the hopes that if the host is
- * currently running on another CPU, we can keep it processing the new
- * descriptor.
- */
- avail_idx = (uint16_t)(vq->vq_avail_idx & (vq->vq_nentries - 1));
- vq->vq_ring.avail->ring[avail_idx] = desc_idx;
- vq->vq_avail_idx++;
-}
-
-static inline int
-virtqueue_kick_prepare(struct virtqueue *vq)
-{
- return !(vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY);
-}
-
-static inline void
-virtqueue_notify(struct virtqueue *vq)
-{
- /*
- * Ensure updated avail->idx is visible to host.
- * For virtio on IA, the notificaiton is through io port operation
- * which is a serialization instruction itself.
- */
- VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_NOTIFY, vq->vq_queue_index);
-}
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
-#define VIRTQUEUE_DUMP(vq) do { \
- uint16_t used_idx, nused; \
- used_idx = (vq)->vq_ring.used->idx; \
- nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \
- PMD_INIT_LOG(DEBUG, \
- "VQ: - size=%d; free=%d; used=%d; desc_head_idx=%d;" \
- " avail.idx=%d; used_cons_idx=%d; used.idx=%d;" \
- " avail.flags=0x%x; used.flags=0x%x", \
- (vq)->vq_nentries, (vq)->vq_free_cnt, nused, \
- (vq)->vq_desc_head_idx, (vq)->vq_ring.avail->idx, \
- (vq)->vq_used_cons_idx, (vq)->vq_ring.used->idx, \
- (vq)->vq_ring.avail->flags, (vq)->vq_ring.used->flags); \
-} while (0)
-#else
-#define VIRTQUEUE_DUMP(vq) do { } while (0)
-#endif
-
-#endif /* _VIRTQUEUE_H_ */
git.droids-corp.org / dpdk.git / commitdiff