diff options
Diffstat (limited to 'drivers/net/virtio/virtio_ethdev.c')
| -rw-r--r-- | drivers/net/virtio/virtio_ethdev.c | 1461 |
1 files changed, 1461 insertions, 0 deletions
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c new file mode 100644 index 00000000..63a368ac --- /dev/null +++ b/drivers/net/virtio/virtio_ethdev.c @@ -0,0 +1,1461 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2015 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> + +#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_errno.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" +#include "virtio_rxtx.h" + + +static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev); +static int eth_virtio_dev_uninit(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_stats_get(struct rte_eth_dev *dev, + struct rte_eth_stats *stats); +static int virtio_dev_xstats_get(struct rte_eth_dev *dev, + struct rte_eth_xstats *xstats, unsigned n); +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 */ }, +}; + +struct rte_virtio_xstats_name_off { + char name[RTE_ETH_XSTATS_NAME_SIZE]; + unsigned offset; +}; + +/* [rt]x_qX_ is prepended to the name string here */ +static const struct rte_virtio_xstats_name_off rte_virtio_q_stat_strings[] = { + {"good_packets", offsetof(struct virtqueue, packets)}, + {"good_bytes", offsetof(struct virtqueue, bytes)}, + {"errors", offsetof(struct virtqueue, errors)}, + {"multicast_packets", offsetof(struct virtqueue, multicast)}, + {"broadcast_packets", offsetof(struct virtqueue, broadcast)}, + {"undersize_packets", offsetof(struct virtqueue, size_bins[0])}, + {"size_64_packets", offsetof(struct virtqueue, size_bins[1])}, + {"size_65_127_packets", offsetof(struct virtqueue, size_bins[2])}, + {"size_128_255_packets", offsetof(struct virtqueue, size_bins[3])}, + {"size_256_511_packets", offsetof(struct virtqueue, size_bins[4])}, + {"size_512_1023_packets", offsetof(struct virtqueue, size_bins[5])}, + {"size_1024_1517_packets", offsetof(struct virtqueue, size_bins[6])}, + {"size_1518_max_packets", offsetof(struct virtqueue, size_bins[7])}, +}; + +#define VIRTIO_NB_Q_XSTATS (sizeof(rte_virtio_q_stat_strings) / \ + sizeof(rte_virtio_q_stat_strings[0])) + +static int +virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl, + int *dlen, int pkt_num) +{ + uint32_t head, i; + int k, sum = 0; + virtio_net_ctrl_ack status = ~0; + struct virtio_pmd_ctrl result; + + ctrl->status = status; + + if (!(vq && vq->hw->cvq)) { + PMD_INIT_LOG(ERR, "Control queue is not supported."); + return -1; + } + head = vq->vq_desc_head_idx; + + 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; +} + +void +virtio_dev_queue_release(struct virtqueue *vq) { + struct virtio_hw *hw; + + if (vq) { + hw = vq->hw; + hw->vtpci_ops->del_queue(hw, vq); + + rte_free(vq->sw_ring); + rte_free(vq); + } +} + +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; + unsigned int vq_size, size; + struct virtio_hw *hw = dev->data->dev_private; + struct virtqueue *vq = NULL; + + PMD_INIT_LOG(DEBUG, "setting up queue: %u", 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 = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx); + PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc); + if (vq_size == 0) { + PMD_INIT_LOG(ERR, "virtqueue does not exist"); + return -EINVAL; + } + + if (!rte_is_power_of_2(vq_size)) { + PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2"); + return -EINVAL; + } + + 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); + vq->sw_ring = rte_zmalloc_socket("rxq->sw_ring", + (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) * + sizeof(vq->sw_ring[0]), RTE_CACHE_LINE_SIZE, socket_id); + } 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, "Can not allocate virtqueue"); + return -ENOMEM; + } + if (queue_type == VTNET_RQ && vq->sw_ring == NULL) { + PMD_INIT_LOG(ERR, "Can not allocate RX soft ring"); + rte_free(vq); + 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; + + if (nb_desc == 0 || nb_desc > vq_size) + nb_desc = vq_size; + vq->vq_free_cnt = nb_desc; + + /* + * 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) { + if (rte_errno == EEXIST) + mz = rte_memzone_lookup(vq_name); + 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) { + const struct rte_memzone *hdr_mz; + struct virtio_tx_region *txr; + unsigned int i; + + /* + * For each xmit packet, allocate a virtio_net_hdr + * and indirect ring elements + */ + snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone", + dev->data->port_id, queue_idx); + hdr_mz = rte_memzone_reserve_aligned(vq_name, + vq_size * sizeof(*txr), + socket_id, 0, + RTE_CACHE_LINE_SIZE); + if (hdr_mz == NULL) { + if (rte_errno == EEXIST) + hdr_mz = rte_memzone_lookup(vq_name); + if (hdr_mz == NULL) { + rte_free(vq); + return -ENOMEM; + } + } + vq->virtio_net_hdr_mz = hdr_mz; + vq->virtio_net_hdr_mem = hdr_mz->phys_addr; + + txr = hdr_mz->addr; + memset(txr, 0, vq_size * sizeof(*txr)); + for (i = 0; i < vq_size; i++) { + struct vring_desc *start_dp = txr[i].tx_indir; + + vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir)); + + /* first indirect descriptor is always the tx header */ + start_dp->addr = vq->virtio_net_hdr_mem + + i * sizeof(*txr) + + offsetof(struct virtio_tx_region, tx_hdr); + + start_dp->len = vq->hw->vtnet_hdr_size; + start_dp->flags = VRING_DESC_F_NEXT; + } + + } 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) { + if (rte_errno == EEXIST) + vq->virtio_net_hdr_mz = + rte_memzone_lookup(vq_name); + 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); + } + + hw->vtpci_ops->setup_queue(hw, vq); + + *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; + 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, 0, socket_id, &vq); + if (ret < 0) { + PMD_INIT_LOG(ERR, "control vq initialization failed"); + return ret; + } + + hw->cvq = vq; + return 0; +} + +static void +virtio_free_queues(struct rte_eth_dev *dev) +{ + unsigned int i; + + for (i = 0; i < dev->data->nb_rx_queues; i++) + virtio_dev_rx_queue_release(dev->data->rx_queues[i]); + + dev->data->nb_rx_queues = 0; + + for (i = 0; i < dev->data->nb_tx_queues; i++) + virtio_dev_tx_queue_release(dev->data->tx_queues[i]); + + dev->data->nb_tx_queues = 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"); + + if (hw->started == 1) + virtio_dev_stop(dev); + + /* 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); + virtio_dev_free_mbufs(dev); + virtio_free_queues(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; + + if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { + PMD_INIT_LOG(INFO, "host does not support rx control\n"); + return; + } + + 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; + + if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { + PMD_INIT_LOG(INFO, "host does not support rx control\n"); + return; + } + + 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; + + if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { + PMD_INIT_LOG(INFO, "host does not support rx control\n"); + return; + } + + 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; + + if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { + PMD_INIT_LOG(INFO, "host does not support rx control\n"); + return; + } + + 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, + .xstats_get = virtio_dev_xstats_get, + .stats_reset = virtio_dev_stats_reset, + .xstats_reset = virtio_dev_stats_reset, + .link_update = virtio_dev_link_update, + .rx_queue_setup = virtio_dev_rx_queue_setup, + .rx_queue_release = virtio_dev_rx_queue_release, + .tx_queue_setup = virtio_dev_tx_queue_setup, + .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_update_stats(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 int +virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstats *xstats, + unsigned n) +{ + unsigned i; + unsigned count = 0; + + unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_Q_XSTATS + + dev->data->nb_rx_queues * VIRTIO_NB_Q_XSTATS; + + if (n < nstats) + return nstats; + + for (i = 0; i < dev->data->nb_rx_queues; i++) { + struct virtqueue *rxvq = dev->data->rx_queues[i]; + + if (rxvq == NULL) + continue; + + unsigned t; + + for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) { + snprintf(xstats[count].name, sizeof(xstats[count].name), + "rx_q%u_%s", i, + rte_virtio_q_stat_strings[t].name); + xstats[count].value = *(uint64_t *)(((char *)rxvq) + + rte_virtio_q_stat_strings[t].offset); + count++; + } + } + + for (i = 0; i < dev->data->nb_tx_queues; i++) { + struct virtqueue *txvq = dev->data->tx_queues[i]; + + if (txvq == NULL) + continue; + + unsigned t; + + for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) { + snprintf(xstats[count].name, sizeof(xstats[count].name), + "tx_q%u_%s", i, + rte_virtio_q_stat_strings[t].name); + xstats[count].value = *(uint64_t *)(((char *)txvq) + + rte_virtio_q_stat_strings[t].offset); + count++; + } + } + + return count; +} + +static void +virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) +{ + virtio_update_stats(dev, stats); +} + +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; + txvq->multicast = 0; + txvq->broadcast = 0; + memset(txvq->size_bins, 0, sizeof(txvq->size_bins[0]) * 8); + } + + 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; + rxvq->multicast = 0; + rxvq->broadcast = 0; + memset(rxvq->size_bins, 0, sizeof(rxvq->size_bins[0]) * 8); + } +} + +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 void +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]; + + if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { + PMD_DRV_LOG(INFO, "host does not support mac table\n"); + return; + } + + 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); +} + +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 int +virtio_negotiate_features(struct virtio_hw *hw) +{ + uint64_t host_features; + + /* Prepare guest_features: feature that driver wants to support */ + hw->guest_features = VIRTIO_PMD_GUEST_FEATURES; + PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64, + hw->guest_features); + + /* Read device(host) feature bits */ + host_features = hw->vtpci_ops->get_features(hw); + PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64, + 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 = %" PRIx64, + hw->guest_features); + + if (hw->modern) { + if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) { + PMD_INIT_LOG(ERR, + "VIRTIO_F_VERSION_1 features is not enabled."); + return -1; + } + vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK); + if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) { + PMD_INIT_LOG(ERR, + "failed to set FEATURES_OK status!"); + return -1; + } + } + + return 0; +} + +/* + * 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; + struct rte_pci_device *pci_dev; + int ret; + + 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", VIRTIO_MAX_MAC_ADDRS * 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", + VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN); + return -ENOMEM; + } + + pci_dev = eth_dev->pci_dev; + + ret = vtpci_init(pci_dev, hw); + if (ret) + return ret; + + /* 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); + if (virtio_negotiate_features(hw) < 0) + return -1; + + /* If host does not support status then disable LSC */ + if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) + pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC; + + rte_eth_copy_pci_info(eth_dev, pci_dev); + + rx_func_get(eth_dev); + + /* Setting up rx_header size for the device */ + if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || + vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) + 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; + + vtpci_read_dev_config(hw, + offsetof(struct virtio_net_config, mac), + &config->mac, sizeof(config->mac)); + + if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { + vtpci_read_dev_config(hw, + offsetof(struct virtio_net_config, status), + &config->status, 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)) { + vtpci_read_dev_config(hw, + offsetof(struct virtio_net_config, max_virtqueue_pairs), + &config->max_virtqueue_pairs, + sizeof(config->max_virtqueue_pairs)); + } else { + PMD_INIT_LOG(DEBUG, + "VIRTIO_NET_F_MQ is not supported"); + config->max_virtqueue_pairs = 1; + } + + 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; + } + + 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 int +eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev) +{ + struct rte_pci_device *pci_dev; + struct virtio_hw *hw = eth_dev->data->dev_private; + + PMD_INIT_FUNC_TRACE(); + + if (rte_eal_process_type() == RTE_PROC_SECONDARY) + return -EPERM; + + /* Close it anyway since there's no way to know if closed */ + virtio_dev_close(eth_dev); + + pci_dev = eth_dev->pci_dev; + + eth_dev->dev_ops = NULL; + eth_dev->tx_pkt_burst = NULL; + eth_dev->rx_pkt_burst = NULL; + + virtio_dev_queue_release(hw->cvq); + + rte_free(eth_dev->data->mac_addrs); + eth_dev->data->mac_addrs = NULL; + + /* reset interrupt callback */ + if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC) + rte_intr_callback_unregister(&pci_dev->intr_handle, + virtio_interrupt_handler, + eth_dev); + rte_eal_pci_unmap_device(pci_dev); + + PMD_INIT_LOG(DEBUG, "dev_uninit completed"); + + return 0; +} + +static struct eth_driver rte_virtio_pmd = { + .pci_drv = { + .name = "rte_virtio_pmd", + .id_table = pci_id_virtio_map, + .drv_flags = RTE_PCI_DRV_DETACHABLE, + }, + .eth_dev_init = eth_virtio_dev_init, + .eth_dev_uninit = eth_virtio_dev_uninit, + .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; +} + +/* + * 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) { + if (!(pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) { + 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]); + + PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", + i, 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; + struct virtio_hw *hw = dev->data->dev_private; + + PMD_INIT_LOG(DEBUG, "stop"); + + hw->started = 0; + + 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 = ETH_LINK_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 = ETH_LINK_DOWN; + PMD_INIT_LOG(DEBUG, "Port %d is down", + dev->data->port_id); + } else { + link.link_status = ETH_LINK_UP; + PMD_INIT_LOG(DEBUG, "Port %d is up", + dev->data->port_id); + } + } else { + link.link_status = ETH_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); |