/*-
* 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>
#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 eth_driver *eth_drv,
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_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 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)
{
uint32_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);
while (vq->vq_used_cons_idx == vq->vq_ring.used->idx)
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;
rmb();
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
= VIRTIO_DEV_PRIVATE_TO_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,
uint8_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 =
VIRTIO_DEV_PRIVATE_TO_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_alignment = VIRTIO_PCI_VRING_ALIGN;
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)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 =
VIRTIO_DEV_PRIVATE_TO_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)
{
PMD_INIT_LOG(DEBUG, "virtio_dev_close");
virtio_dev_stop(dev);
}
static void
virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
{
struct virtio_hw *hw
= VIRTIO_DEV_PRIVATE_TO_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
= VIRTIO_DEV_PRIVATE_TO_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
= VIRTIO_DEV_PRIVATE_TO_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
= VIRTIO_DEV_PRIVATE_TO_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 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,
.mac_addr_add = NULL,
.mac_addr_remove = NULL,
.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,
};
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 void
virtio_negotiate_features(struct virtio_hw *hw)
{
uint32_t host_features, mask;
mask = VIRTIO_NET_F_CTRL_VLAN;
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);
}
#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;
}
#endif
/*
* This function is based on probe() function in virtio_pci.c
* It returns 0 on success.
*/
static int
eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
struct rte_eth_dev *eth_dev)
{
struct virtio_net_config *config;
struct virtio_net_config local_config;
uint32_t offset_conf = sizeof(config->mac);
struct rte_pci_device *pci_dev;
struct virtio_hw *hw =
VIRTIO_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
if (RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr)) {
PMD_INIT_LOG(ERR,
"MBUF HEADROOM should be enough to hold virtio net hdr\n");
return -1;
}
eth_dev->dev_ops = &virtio_eth_dev_ops;
eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
if (rte_eal_process_type() == RTE_PROC_SECONDARY)
return 0;
pci_dev = eth_dev->pci_dev;
#ifdef RTE_EXEC_ENV_LINUXAPP
{
char dirname[PATH_MAX];
char filename[PATH_MAX];
unsigned long start, size;
if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname)) < 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);
}
#endif
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);
/* Setting up rx_header size for the device */
if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
} else {
eth_dev->rx_pkt_burst = &virtio_recv_pkts;
hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
}
/* 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;
}
/* 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);
return 0;
}
static struct eth_driver rte_virtio_pmd = {
{
.name = "rte_virtio_pmd",
.id_table = pci_id_virtio_map,
.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
},
.eth_dev_init = eth_virtio_dev_init,
.dev_private_size = sizeof(struct virtio_adapter),
};
/*
* 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;
PMD_INIT_LOG(DEBUG, "configure");
if (rxmode->hw_ip_checksum) {
PMD_DRV_LOG(ERR, "HW IP checksum not supported");
return (-EINVAL);
}
return 0;
}
static int
virtio_dev_start(struct rte_eth_dev *dev)
{
uint16_t nb_queues, i;
uint16_t status;
struct virtio_hw *hw =
VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
/* 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_dev_cq_start(dev);
/* Do final configuration before rx/tx engine starts */
virtio_dev_rxtx_start(dev);
/* Check VIRTIO_NET_F_STATUS for link status*/
if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
vtpci_read_dev_config(hw,
offsetof(struct virtio_net_config, status),
&status, sizeof(status));
if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
PMD_INIT_LOG(ERR, "Port: %d Link is DOWN",
dev->data->port_id);
return -EIO;
} else {
PMD_INIT_LOG(DEBUG, "Port: %d Link is UP",
dev->data->port_id);
}
}
vtpci_reinit_complete(hw);
/*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 rx and tx functions to allow for reconfiguring.
*/
static void
virtio_dev_stop(struct rte_eth_dev *dev)
{
struct virtio_hw *hw =
VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
/* reset the NIC */
vtpci_reset(hw);
virtio_dev_free_mbufs(dev);
}
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 =
VIRTIO_DEV_PRIVATE_TO_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);
if (old.link_status == link.link_status)
return -1;
/*changed*/
return 0;
}
static void
virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
{
struct virtio_hw *hw = VIRTIO_DEV_PRIVATE_TO_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;
}
/*
* 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);