This vhost example demonstrates how to integrate user space vhost with DPDK
accelerated ethernet vSwitch.
1) rte_vhost_driver_register initialises vhost driver.
2) rte_vhost_driver_callback_register registers new_device/destroy_device
callbacks.
Those callbacks should be implemented in ethernet switch application.
new_device is called when a virtio_device is ready for processing in
vSwitch.
destroy_device is called when a virtio_device is de-activated by guest OS.
3) rte_vhost_driver_session_start starts vhost driver session loop.
4) rte_vhost_enqueue/dequeue_burst to send packets to or receive packets from
guest virtio device. virtio_dev_rx/tx is removed.
5) zero copy feature is implemented in the example.
6) mergable rx/tx will be implemented in vhost lib.
Signed-off-by: Huawei Xie <huawei.xie at intel.com>
---
examples/vhost/Makefile | 52 ++
examples/vhost/main.c | 1455 +++++++++++++----------------------------------
examples/vhost/main.h | 47 +-
3 files changed, 483 insertions(+), 1071 deletions(-)
create mode 100644 examples/vhost/Makefile
diff --git a/examples/vhost/Makefile b/examples/vhost/Makefile
new file mode 100644
index 0000000..a4d4fb0
--- /dev/null
+++ b/examples/vhost/Makefile
@@ -0,0 +1,52 @@
+# 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.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overriden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# binary name
+APP = vhost-switch
+
+# all source are stored in SRCS-y
+#SRCS-y := cusedrv.c loopback-userspace.c
+SRCS-y := main.c
+
+CFLAGS += -O2 -I/usr/local/include -D_FILE_OFFSET_BITS=64 -Wno-unused-parameter
+CFLAGS += $(WERROR_FLAGS)
+LDFLAGS += -lfuse
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 7d9e6a2..a796dbd 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -49,10 +49,9 @@
#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_malloc.h>
+#include <rte_virtio_net.h>
#include "main.h"
-#include "virtio-net.h"
-#include "vhost-net-cdev.h"
#define MAX_QUEUES 128
@@ -100,7 +99,6 @@
#define TX_WTHRESH 0 /* Default values of TX write-back threshold reg. */
#define MAX_PKT_BURST 32 /* Max burst size for RX/TX */
-#define MAX_MRG_PKT_BURST 16 /* Max burst for merge buffers. Set to 1 due to
performance issue. */
#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
#define BURST_RX_WAIT_US 15 /* Defines how long we wait between retries on
RX */
@@ -168,13 +166,14 @@ static uint32_t num_switching_cores = 0;
/* number of devices/queues to support*/
static uint32_t num_queues = 0;
-uint32_t num_devices = 0;
+static uint32_t num_devices;
/*
* Enable zero copy, pkts buffer will directly dma to hw descriptor,
* disabled on default.
*/
static uint32_t zero_copy;
+static int mergeable;
/* number of descriptors to apply*/
static uint32_t num_rx_descriptor = RTE_TEST_RX_DESC_DEFAULT_ZCP;
@@ -218,12 +217,6 @@ static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
/* Character device basename. Can be set by user. */
static char dev_basename[MAX_BASENAME_SZ] = "vhost-net";
-/* Charater device index. Can be set by user. */
-static uint32_t dev_index = 0;
-
-/* This can be set by the user so it is made available here. */
-extern uint64_t VHOST_FEATURES;
-
/* Default configuration for rx and tx thresholds etc. */
static struct rte_eth_rxconf rx_conf_default = {
.rx_thresh = {
@@ -678,11 +671,12 @@ us_vhost_parse_args(int argc, char **argv)
us_vhost_usage(prgname);
return -1;
} else {
+ mergeable = !!ret;
if (ret) {
vmdq_conf_default.rxmode.jumbo_frame = 1;
vmdq_conf_default.rxmode.max_rx_pkt_len
= JUMBO_FRAME_MAX_SIZE;
- VHOST_FEATURES = (1ULL <<
VIRTIO_NET_F_MRG_RXBUF);
+
}
}
}
@@ -708,17 +702,6 @@ us_vhost_parse_args(int argc, char **argv)
}
}
- /* Set character device index. */
- if (!strncmp(long_option[option_index].name,
"dev-index", MAX_LONG_OPT_SZ)) {
- ret = parse_num_opt(optarg, INT32_MAX);
- if (ret == -1) {
- RTE_LOG(INFO, VHOST_CONFIG, "Invalid
argument for character device index [0..N]\n");
- us_vhost_usage(prgname);
- return -1;
- } else
- dev_index = ret;
- }
-
/* Enable/disable rx/tx zero copy. */
if (!strncmp(long_option[option_index].name,
"zero-copy", MAX_LONG_OPT_SZ)) {
@@ -867,36 +850,11 @@ static unsigned check_ports_num(unsigned nb_ports)
#endif
/*
- * Function to convert guest physical addresses to vhost virtual addresses.
This
- * is used to convert virtio buffer addresses.
- */
-static inline uint64_t __attribute__((always_inline))
-gpa_to_vva(struct virtio_net *dev, uint64_t guest_pa)
-{
- struct virtio_memory_regions *region;
- uint32_t regionidx;
- uint64_t vhost_va = 0;
-
- for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
- region = &dev->mem->regions[regionidx];
- if ((guest_pa >= region->guest_phys_address) &&
- (guest_pa <= region->guest_phys_address_end)) {
- vhost_va = region->address_offset + guest_pa;
- break;
- }
- }
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") GPA %p| VVA %p\n",
- dev->device_fh, (void*)(uintptr_t)guest_pa,
(void*)(uintptr_t)vhost_va);
-
- return vhost_va;
-}
-
-/*
* Function to convert guest physical addresses to vhost physical addresses.
* This is used to convert virtio buffer addresses.
*/
static inline uint64_t __attribute__((always_inline))
-gpa_to_hpa(struct virtio_net *dev, uint64_t guest_pa,
+gpa_to_hpa(struct vhost_dev *vdev, uint64_t guest_pa,
uint32_t buf_len, hpa_type *addr_type)
{
struct virtio_memory_regions_hpa *region;
@@ -905,8 +863,8 @@ gpa_to_hpa(struct virtio_net *dev, uint64_t guest_pa,
*addr_type = PHYS_ADDR_INVALID;
- for (regionidx = 0; regionidx < dev->mem->nregions_hpa; regionidx++) {
- region = &dev->mem->regions_hpa[regionidx];
+ for (regionidx = 0; regionidx < vdev->nregions_hpa; regionidx++) {
+ region = &vdev->regions_hpa[regionidx];
if ((guest_pa >= region->guest_phys_address) &&
(guest_pa <= region->guest_phys_address_end)) {
vhost_pa = region->host_phys_addr_offset + guest_pa;
@@ -927,497 +885,6 @@ gpa_to_hpa(struct virtio_net *dev, uint64_t guest_pa,
}
/*
- * This function adds buffers to the virtio devices RX virtqueue. Buffers can
- * be received from the physical port or from another virtio device. A packet
- * count is returned to indicate the number of packets that were succesfully
- * added to the RX queue. This function works when mergeable is disabled.
- */
-static inline uint32_t __attribute__((always_inline))
-virtio_dev_rx(struct virtio_net *dev, struct rte_mbuf **pkts, uint32_t count)
-{
- struct vhost_virtqueue *vq;
- struct vring_desc *desc;
- struct rte_mbuf *buff;
- /* The virtio_hdr is initialised to 0. */
- struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0,0,0,0,0,0},0};
- uint64_t buff_addr = 0;
- uint64_t buff_hdr_addr = 0;
- uint32_t head[MAX_PKT_BURST], packet_len = 0;
- uint32_t head_idx, packet_success = 0;
- uint32_t retry = 0;
- uint16_t avail_idx, res_cur_idx;
- uint16_t res_base_idx, res_end_idx;
- uint16_t free_entries;
- uint8_t success = 0;
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_rx()\n", dev->device_fh);
- vq = dev->virtqueue[VIRTIO_RXQ];
- count = (count > MAX_PKT_BURST) ? MAX_PKT_BURST : count;
-
- /* As many data cores may want access to available buffers, they need
to be reserved. */
- do {
- res_base_idx = vq->last_used_idx_res;
- avail_idx = *((volatile uint16_t *)&vq->avail->idx);
-
- free_entries = (avail_idx - res_base_idx);
- /* If retry is enabled and the queue is full then we wait and
retry to avoid packet loss. */
- if (enable_retry && unlikely(count > free_entries)) {
- for (retry = 0; retry < burst_rx_retry_num; retry++) {
- rte_delay_us(burst_rx_delay_time);
- avail_idx =
- *((volatile uint16_t *)&vq->avail->idx);
- free_entries = (avail_idx - res_base_idx);
- if (count <= free_entries)
- break;
- }
- }
-
- /*check that we have enough buffers*/
- if (unlikely(count > free_entries))
- count = free_entries;
-
- if (count == 0)
- return 0;
-
- res_end_idx = res_base_idx + count;
- /* vq->last_used_idx_res is atomically updated. */
- success = rte_atomic16_cmpset(&vq->last_used_idx_res,
res_base_idx,
-
res_end_idx);
- } while (unlikely(success == 0));
- res_cur_idx = res_base_idx;
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Current Index %d| End Index %d\n",
dev->device_fh, res_cur_idx, res_end_idx);
-
- /* Prefetch available ring to retrieve indexes. */
- rte_prefetch0(&vq->avail->ring[res_cur_idx & (vq->size - 1)]);
-
- /* Retrieve all of the head indexes first to avoid caching issues. */
- for (head_idx = 0; head_idx < count; head_idx++)
- head[head_idx] = vq->avail->ring[(res_cur_idx + head_idx) &
(vq->size - 1)];
-
- /*Prefetch descriptor index. */
- rte_prefetch0(&vq->desc[head[packet_success]]);
-
- while (res_cur_idx != res_end_idx) {
- /* Get descriptor from available ring */
- desc = &vq->desc[head[packet_success]];
-
- buff = pkts[packet_success];
-
- /* Convert from gpa to vva (guest physical addr -> vhost
virtual addr) */
- buff_addr = gpa_to_vva(dev, desc->addr);
- /* Prefetch buffer address. */
- rte_prefetch0((void*)(uintptr_t)buff_addr);
-
- /* Copy virtio_hdr to packet and increment buffer address */
- buff_hdr_addr = buff_addr;
- packet_len = rte_pktmbuf_data_len(buff) + vq->vhost_hlen;
-
- /*
- * If the descriptors are chained the header and data are
- * placed in separate buffers.
- */
- if (desc->flags & VRING_DESC_F_NEXT) {
- desc->len = vq->vhost_hlen;
- desc = &vq->desc[desc->next];
- /* Buffer address translation. */
- buff_addr = gpa_to_vva(dev, desc->addr);
- desc->len = rte_pktmbuf_data_len(buff);
- } else {
- buff_addr += vq->vhost_hlen;
- desc->len = packet_len;
- }
-
- /* Update used ring with desc information */
- vq->used->ring[res_cur_idx & (vq->size - 1)].id =
head[packet_success];
- vq->used->ring[res_cur_idx & (vq->size - 1)].len = packet_len;
-
- /* Copy mbuf data to buffer */
- rte_memcpy((void *)(uintptr_t)buff_addr,
- (const void *)buff->pkt.data,
- rte_pktmbuf_data_len(buff));
- PRINT_PACKET(dev, (uintptr_t)buff_addr,
- rte_pktmbuf_data_len(buff), 0);
-
- res_cur_idx++;
- packet_success++;
-
- rte_memcpy((void *)(uintptr_t)buff_hdr_addr,
- (const void *)&virtio_hdr, vq->vhost_hlen);
-
- PRINT_PACKET(dev, (uintptr_t)buff_hdr_addr, vq->vhost_hlen, 1);
-
- if (res_cur_idx < res_end_idx) {
- /* Prefetch descriptor index. */
- rte_prefetch0(&vq->desc[head[packet_success]]);
- }
- }
-
- rte_compiler_barrier();
-
- /* Wait until it's our turn to add our buffer to the used ring. */
- while (unlikely(vq->last_used_idx != res_base_idx))
- rte_pause();
-
- *(volatile uint16_t *)&vq->used->idx += count;
- vq->last_used_idx = res_end_idx;
-
- /* Kick the guest if necessary. */
- if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- eventfd_write((int)vq->kickfd, 1);
- return count;
-}
-
-static inline uint32_t __attribute__((always_inline))
-copy_from_mbuf_to_vring(struct virtio_net *dev,
- uint16_t res_base_idx, uint16_t res_end_idx,
- struct rte_mbuf *pkt)
-{
- uint32_t vec_idx = 0;
- uint32_t entry_success = 0;
- struct vhost_virtqueue *vq;
- /* The virtio_hdr is initialised to 0. */
- struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {
- {0, 0, 0, 0, 0, 0}, 0};
- uint16_t cur_idx = res_base_idx;
- uint64_t vb_addr = 0;
- uint64_t vb_hdr_addr = 0;
- uint32_t seg_offset = 0;
- uint32_t vb_offset = 0;
- uint32_t seg_avail;
- uint32_t vb_avail;
- uint32_t cpy_len, entry_len;
-
- if (pkt == NULL)
- return 0;
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Current Index %d| "
- "End Index %d\n",
- dev->device_fh, cur_idx, res_end_idx);
-
- /*
- * Convert from gpa to vva
- * (guest physical addr -> vhost virtual addr)
- */
- vq = dev->virtqueue[VIRTIO_RXQ];
- vb_addr =
- gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr);
- vb_hdr_addr = vb_addr;
-
- /* Prefetch buffer address. */
- rte_prefetch0((void *)(uintptr_t)vb_addr);
-
- virtio_hdr.num_buffers = res_end_idx - res_base_idx;
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") RX: Num merge buffers %d\n",
- dev->device_fh, virtio_hdr.num_buffers);
-
- rte_memcpy((void *)(uintptr_t)vb_hdr_addr,
- (const void *)&virtio_hdr, vq->vhost_hlen);
-
- PRINT_PACKET(dev, (uintptr_t)vb_hdr_addr, vq->vhost_hlen, 1);
-
- seg_avail = rte_pktmbuf_data_len(pkt);
- vb_offset = vq->vhost_hlen;
- vb_avail =
- vq->buf_vec[vec_idx].buf_len - vq->vhost_hlen;
-
- entry_len = vq->vhost_hlen;
-
- if (vb_avail == 0) {
- uint32_t desc_idx =
- vq->buf_vec[vec_idx].desc_idx;
- vq->desc[desc_idx].len = vq->vhost_hlen;
-
- if ((vq->desc[desc_idx].flags
- & VRING_DESC_F_NEXT) == 0) {
- /* Update used ring with desc information */
- vq->used->ring[cur_idx & (vq->size - 1)].id
- = vq->buf_vec[vec_idx].desc_idx;
- vq->used->ring[cur_idx & (vq->size - 1)].len
- = entry_len;
-
- entry_len = 0;
- cur_idx++;
- entry_success++;
- }
-
- vec_idx++;
- vb_addr =
- gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr);
-
- /* Prefetch buffer address. */
- rte_prefetch0((void *)(uintptr_t)vb_addr);
- vb_offset = 0;
- vb_avail = vq->buf_vec[vec_idx].buf_len;
- }
-
- cpy_len = RTE_MIN(vb_avail, seg_avail);
-
- while (cpy_len > 0) {
- /* Copy mbuf data to vring buffer */
- rte_memcpy((void *)(uintptr_t)(vb_addr + vb_offset),
- (const void *)(rte_pktmbuf_mtod(pkt, char*) +
seg_offset),
- cpy_len);
-
- PRINT_PACKET(dev,
- (uintptr_t)(vb_addr + vb_offset),
- cpy_len, 0);
-
- seg_offset += cpy_len;
- vb_offset += cpy_len;
- seg_avail -= cpy_len;
- vb_avail -= cpy_len;
- entry_len += cpy_len;
-
- if (seg_avail != 0) {
- /*
- * The virtio buffer in this vring
- * entry reach to its end.
- * But the segment doesn't complete.
- */
- if ((vq->desc[vq->buf_vec[vec_idx].desc_idx].flags &
- VRING_DESC_F_NEXT) == 0) {
- /* Update used ring with desc information */
- vq->used->ring[cur_idx & (vq->size - 1)].id
- = vq->buf_vec[vec_idx].desc_idx;
- vq->used->ring[cur_idx & (vq->size - 1)].len
- = entry_len;
- entry_len = 0;
- cur_idx++;
- entry_success++;
- }
-
- vec_idx++;
- vb_addr = gpa_to_vva(dev,
- vq->buf_vec[vec_idx].buf_addr);
- vb_offset = 0;
- vb_avail = vq->buf_vec[vec_idx].buf_len;
- cpy_len = RTE_MIN(vb_avail, seg_avail);
- } else {
- /*
- * This current segment complete, need continue to
- * check if the whole packet complete or not.
- */
- pkt = pkt->pkt.next;
- if (pkt != NULL) {
- /*
- * There are more segments.
- */
- if (vb_avail == 0) {
- /*
- * This current buffer from vring is
- * used up, need fetch next buffer
- * from buf_vec.
- */
- uint32_t desc_idx =
- vq->buf_vec[vec_idx].desc_idx;
- vq->desc[desc_idx].len = vb_offset;
-
- if ((vq->desc[desc_idx].flags &
- VRING_DESC_F_NEXT) == 0) {
- uint16_t wrapped_idx =
- cur_idx & (vq->size -
1);
- /*
- * Update used ring with the
- * descriptor information
- */
- vq->used->ring[wrapped_idx].id
- = desc_idx;
- vq->used->ring[wrapped_idx].len
- = entry_len;
- entry_success++;
- entry_len = 0;
- cur_idx++;
- }
-
- /* Get next buffer from buf_vec. */
- vec_idx++;
- vb_addr = gpa_to_vva(dev,
- vq->buf_vec[vec_idx].buf_addr);
- vb_avail =
- vq->buf_vec[vec_idx].buf_len;
- vb_offset = 0;
- }
-
- seg_offset = 0;
- seg_avail = rte_pktmbuf_data_len(pkt);
- cpy_len = RTE_MIN(vb_avail, seg_avail);
- } else {
- /*
- * This whole packet completes.
- */
- uint32_t desc_idx =
- vq->buf_vec[vec_idx].desc_idx;
- vq->desc[desc_idx].len = vb_offset;
-
- while (vq->desc[desc_idx].flags &
- VRING_DESC_F_NEXT) {
- desc_idx = vq->desc[desc_idx].next;
- vq->desc[desc_idx].len = 0;
- }
-
- /* Update used ring with desc information */
- vq->used->ring[cur_idx & (vq->size - 1)].id
- = vq->buf_vec[vec_idx].desc_idx;
- vq->used->ring[cur_idx & (vq->size - 1)].len
- = entry_len;
- entry_len = 0;
- cur_idx++;
- entry_success++;
- seg_avail = 0;
- cpy_len = RTE_MIN(vb_avail, seg_avail);
- }
- }
- }
-
- return entry_success;
-}
-
-/*
- * This function adds buffers to the virtio devices RX virtqueue. Buffers can
- * be received from the physical port or from another virtio device. A packet
- * count is returned to indicate the number of packets that were succesfully
- * added to the RX queue. This function works for mergeable RX.
- */
-static inline uint32_t __attribute__((always_inline))
-virtio_dev_merge_rx(struct virtio_net *dev, struct rte_mbuf **pkts,
- uint32_t count)
-{
- struct vhost_virtqueue *vq;
- uint32_t pkt_idx = 0, entry_success = 0;
- uint32_t retry = 0;
- uint16_t avail_idx, res_cur_idx;
- uint16_t res_base_idx, res_end_idx;
- uint8_t success = 0;
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_merge_rx()\n",
- dev->device_fh);
- vq = dev->virtqueue[VIRTIO_RXQ];
- count = RTE_MIN((uint32_t)MAX_PKT_BURST, count);
-
- if (count == 0)
- return 0;
-
- for (pkt_idx = 0; pkt_idx < count; pkt_idx++) {
- uint32_t secure_len = 0;
- uint16_t need_cnt;
- uint32_t vec_idx = 0;
- uint32_t pkt_len = pkts[pkt_idx]->pkt.pkt_len + vq->vhost_hlen;
- uint16_t i, id;
-
- do {
- /*
- * As many data cores may want access to available
- * buffers, they need to be reserved.
- */
- res_base_idx = vq->last_used_idx_res;
- res_cur_idx = res_base_idx;
-
- do {
- avail_idx = *((volatile uint16_t
*)&vq->avail->idx);
- if (unlikely(res_cur_idx == avail_idx)) {
- /*
- * If retry is enabled and the queue is
- * full then we wait and retry to avoid
- * packet loss.
- */
- if (enable_retry) {
- uint8_t cont = 0;
- for (retry = 0; retry <
burst_rx_retry_num; retry++) {
-
rte_delay_us(burst_rx_delay_time);
- avail_idx =
- *((volatile
uint16_t *)&vq->avail->idx);
- if (likely(res_cur_idx
!= avail_idx)) {
- cont = 1;
- break;
- }
- }
- if (cont == 1)
- continue;
- }
-
- LOG_DEBUG(VHOST_DATA,
- "(%"PRIu64") Failed "
- "to get enough desc from "
- "vring\n",
- dev->device_fh);
- return pkt_idx;
- } else {
- uint16_t wrapped_idx =
- (res_cur_idx) & (vq->size - 1);
- uint32_t idx =
- vq->avail->ring[wrapped_idx];
- uint8_t next_desc;
-
- do {
- next_desc = 0;
- secure_len += vq->desc[idx].len;
- if (vq->desc[idx].flags &
- VRING_DESC_F_NEXT) {
- idx =
vq->desc[idx].next;
- next_desc = 1;
- }
- } while (next_desc);
-
- res_cur_idx++;
- }
- } while (pkt_len > secure_len);
-
- /* vq->last_used_idx_res is atomically updated. */
- success = rte_atomic16_cmpset(&vq->last_used_idx_res,
- res_base_idx,
- res_cur_idx);
- } while (success == 0);
-
- id = res_base_idx;
- need_cnt = res_cur_idx - res_base_idx;
-
- for (i = 0; i < need_cnt; i++, id++) {
- uint16_t wrapped_idx = id & (vq->size - 1);
- uint32_t idx = vq->avail->ring[wrapped_idx];
- uint8_t next_desc;
- do {
- next_desc = 0;
- vq->buf_vec[vec_idx].buf_addr =
- vq->desc[idx].addr;
- vq->buf_vec[vec_idx].buf_len =
- vq->desc[idx].len;
- vq->buf_vec[vec_idx].desc_idx = idx;
- vec_idx++;
-
- if (vq->desc[idx].flags & VRING_DESC_F_NEXT) {
- idx = vq->desc[idx].next;
- next_desc = 1;
- }
- } while (next_desc);
- }
-
- res_end_idx = res_cur_idx;
-
- entry_success = copy_from_mbuf_to_vring(dev, res_base_idx,
- res_end_idx, pkts[pkt_idx]);
-
- rte_compiler_barrier();
-
- /*
- * Wait until it's our turn to add our buffer
- * to the used ring.
- */
- while (unlikely(vq->last_used_idx != res_base_idx))
- rte_pause();
-
- *(volatile uint16_t *)&vq->used->idx += entry_success;
- vq->last_used_idx = res_end_idx;
-
- /* Kick the guest if necessary. */
- if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- eventfd_write((int)vq->kickfd, 1);
- }
-
- return count;
-}
-
-/*
* Compares a packet destination MAC address to a device MAC address.
*/
static inline int __attribute__((always_inline))
@@ -1431,10 +898,11 @@ ether_addr_cmp(struct ether_addr *ea, struct ether_addr
*eb)
* vlan tag to a VMDQ.
*/
static int
-link_vmdq(struct virtio_net *dev, struct rte_mbuf *m)
+link_vmdq(struct vhost_dev *vdev, struct rte_mbuf *m)
{
struct ether_hdr *pkt_hdr;
struct virtio_net_data_ll *dev_ll;
+ struct virtio_net *dev = vdev->dev;
int i, ret;
/* Learn MAC address of guest device from packet */
@@ -1443,7 +911,7 @@ link_vmdq(struct virtio_net *dev, struct rte_mbuf *m)
dev_ll = ll_root_used;
while (dev_ll != NULL) {
- if (ether_addr_cmp(&(pkt_hdr->s_addr),
&dev_ll->dev->mac_address)) {
+ if (ether_addr_cmp(&(pkt_hdr->s_addr),
&dev_ll->vdev->mac_address)) {
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") WARNING: This
device is using an existing MAC address and has not been registered.\n",
dev->device_fh);
return -1;
}
@@ -1451,30 +919,30 @@ link_vmdq(struct virtio_net *dev, struct rte_mbuf *m)
}
for (i = 0; i < ETHER_ADDR_LEN; i++)
- dev->mac_address.addr_bytes[i] = pkt_hdr->s_addr.addr_bytes[i];
+ vdev->mac_address.addr_bytes[i] = pkt_hdr->s_addr.addr_bytes[i];
/* vlan_tag currently uses the device_id. */
- dev->vlan_tag = vlan_tags[dev->device_fh];
+ vdev->vlan_tag = vlan_tags[dev->device_fh];
/* Print out VMDQ registration info. */
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") MAC_ADDRESS
%02x:%02x:%02x:%02x:%02x:%02x and VLAN_TAG %d registered\n",
dev->device_fh,
- dev->mac_address.addr_bytes[0], dev->mac_address.addr_bytes[1],
- dev->mac_address.addr_bytes[2], dev->mac_address.addr_bytes[3],
- dev->mac_address.addr_bytes[4], dev->mac_address.addr_bytes[5],
- dev->vlan_tag);
+ vdev->mac_address.addr_bytes[0],
vdev->mac_address.addr_bytes[1],
+ vdev->mac_address.addr_bytes[2],
vdev->mac_address.addr_bytes[3],
+ vdev->mac_address.addr_bytes[4],
vdev->mac_address.addr_bytes[5],
+ vdev->vlan_tag);
/* Register the MAC address. */
- ret = rte_eth_dev_mac_addr_add(ports[0], &dev->mac_address,
(uint32_t)dev->device_fh);
+ ret = rte_eth_dev_mac_addr_add(ports[0], &vdev->mac_address,
(uint32_t)dev->device_fh);
if (ret)
RTE_LOG(ERR, VHOST_DATA, "(%"PRIu64") Failed to add device MAC
address to VMDQ\n",
dev->device_fh);
/* Enable stripping of the vlan tag as we handle routing. */
- rte_eth_dev_set_vlan_strip_on_queue(ports[0], (uint16_t)dev->vmdq_rx_q,
1);
+ rte_eth_dev_set_vlan_strip_on_queue(ports[0],
(uint16_t)vdev->vmdq_rx_q, 1);
/* Set device as ready for RX. */
- dev->ready = DEVICE_RX;
+ vdev->ready = DEVICE_RX;
return 0;
}
@@ -1484,33 +952,33 @@ link_vmdq(struct virtio_net *dev, struct rte_mbuf *m)
* queue before disabling RX on the device.
*/
static inline void
-unlink_vmdq(struct virtio_net *dev)
+unlink_vmdq(struct vhost_dev *vdev)
{
unsigned i = 0;
unsigned rx_count;
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
- if (dev->ready == DEVICE_RX) {
+ if (vdev->ready == DEVICE_RX) {
/*clear MAC and VLAN settings*/
- rte_eth_dev_mac_addr_remove(ports[0], &dev->mac_address);
+ rte_eth_dev_mac_addr_remove(ports[0], &vdev->mac_address);
for (i = 0; i < 6; i++)
- dev->mac_address.addr_bytes[i] = 0;
+ vdev->mac_address.addr_bytes[i] = 0;
- dev->vlan_tag = 0;
+ vdev->vlan_tag = 0;
/*Clear out the receive buffers*/
rx_count = rte_eth_rx_burst(ports[0],
- (uint16_t)dev->vmdq_rx_q, pkts_burst,
MAX_PKT_BURST);
+ (uint16_t)vdev->vmdq_rx_q, pkts_burst,
MAX_PKT_BURST);
while (rx_count) {
for (i = 0; i < rx_count; i++)
rte_pktmbuf_free(pkts_burst[i]);
rx_count = rte_eth_rx_burst(ports[0],
- (uint16_t)dev->vmdq_rx_q, pkts_burst,
MAX_PKT_BURST);
+ (uint16_t)vdev->vmdq_rx_q, pkts_burst,
MAX_PKT_BURST);
}
- dev->ready = DEVICE_MAC_LEARNING;
+ vdev->ready = DEVICE_MAC_LEARNING;
}
}
@@ -1518,12 +986,14 @@ unlink_vmdq(struct virtio_net *dev)
* Check if the packet destination MAC address is for a local device. If so
then put
* the packet on that devices RX queue. If not then return.
*/
-static inline unsigned __attribute__((always_inline))
-virtio_tx_local(struct virtio_net *dev, struct rte_mbuf *m)
+static inline int __attribute__((always_inline))
+virtio_tx_local(struct vhost_dev *vdev, struct rte_mbuf *m)
{
struct virtio_net_data_ll *dev_ll;
struct ether_hdr *pkt_hdr;
uint64_t ret = 0;
+ struct virtio_net *dev = vdev->dev;
+ struct virtio_net *tdev; /* destination virito device */
pkt_hdr = (struct ether_hdr *)m->pkt.data;
@@ -1531,43 +1001,34 @@ virtio_tx_local(struct virtio_net *dev, struct rte_mbuf
*m)
dev_ll = ll_root_used;
while (dev_ll != NULL) {
- if ((dev_ll->dev->ready == DEVICE_RX) &&
ether_addr_cmp(&(pkt_hdr->d_addr),
- &dev_ll->dev->mac_address)) {
+ if ((dev_ll->vdev->ready == DEVICE_RX) &&
ether_addr_cmp(&(pkt_hdr->d_addr),
+ &dev_ll->vdev->mac_address)) {
/* Drop the packet if the TX packet is destined for the
TX device. */
- if (dev_ll->dev->device_fh == dev->device_fh) {
+ if (dev_ll->vdev->dev->device_fh == dev->device_fh) {
LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: Source
and destination MAC addresses are the same. Dropping packet.\n",
- dev_ll->dev->device_fh);
+ dev->device_fh);
return 0;
}
+ tdev = dev_ll->vdev->dev;
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is
local\n", tdev->device_fh);
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is
local\n", dev_ll->dev->device_fh);
-
- if (dev_ll->dev->remove) {
+ if (unlikely(dev_ll->vdev->remove)) {
/*drop the packet if the device is marked for
removal*/
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Device is
marked for removal\n", dev_ll->dev->device_fh);
+ LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Device is
marked for removal\n", tdev->device_fh);
} else {
- uint32_t mergeable =
- dev_ll->dev->features &
- (1 << VIRTIO_NET_F_MRG_RXBUF);
-
/*send the packet to the local virtio device*/
- if (likely(mergeable == 0))
- ret = virtio_dev_rx(dev_ll->dev, &m, 1);
- else
- ret = virtio_dev_merge_rx(dev_ll->dev,
- &m, 1);
-
+ ret = rte_vhost_enqueue_burst(tdev, VIRTIO_RXQ,
&m, 1);
if (enable_stats) {
rte_atomic64_add(
-
&dev_statistics[dev_ll->dev->device_fh].rx_total_atomic,
+
&dev_statistics[tdev->device_fh].rx_total_atomic,
1);
rte_atomic64_add(
-
&dev_statistics[dev_ll->dev->device_fh].rx_atomic,
+
&dev_statistics[tdev->device_fh].rx_atomic,
ret);
-
dev_statistics[dev->device_fh].tx_total++;
- dev_statistics[dev->device_fh].tx +=
ret;
+
dev_statistics[tdev->device_fh].tx_total++;
+ dev_statistics[tdev->device_fh].tx +=
ret;
}
}
@@ -1584,47 +1045,49 @@ virtio_tx_local(struct virtio_net *dev, struct rte_mbuf
*m)
* or the physical port.
*/
static inline void __attribute__((always_inline))
-virtio_tx_route(struct virtio_net* dev, struct rte_mbuf *m, struct rte_mempool
*mbuf_pool, uint16_t vlan_tag)
+virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m, struct rte_mempool
*mbuf_pool, uint16_t vlan_tag)
{
struct mbuf_table *tx_q;
- struct vlan_ethhdr *vlan_hdr;
struct rte_mbuf **m_table;
- struct rte_mbuf *mbuf, *prev;
unsigned len, ret, offset = 0;
const uint16_t lcore_id = rte_lcore_id();
struct virtio_net_data_ll *dev_ll = ll_root_used;
struct ether_hdr *pkt_hdr = (struct ether_hdr *)m->pkt.data;
+ struct virtio_net *dev = vdev->dev;
- /*check if destination is local VM*/
- if ((vm2vm_mode == VM2VM_SOFTWARE) && (virtio_tx_local(dev, m) == 0))
+ /*heck if destination is local VM*/
+ if (vm2vm_mode == VM2VM_SOFTWARE && (virtio_tx_local(vdev, m) == 0)) {
+ rte_pktmbuf_free(m);
return;
+ }
if (vm2vm_mode == VM2VM_HARDWARE) {
while (dev_ll != NULL) {
- if ((dev_ll->dev->ready == DEVICE_RX)
+ if ((dev_ll->vdev->ready == DEVICE_RX)
&& ether_addr_cmp(&(pkt_hdr->d_addr),
- &dev_ll->dev->mac_address)) {
+ &dev_ll->vdev->mac_address)) {
/*
* Drop the packet if the TX packet is
* destined for the TX device.
*/
- if (dev_ll->dev->device_fh == dev->device_fh) {
+ if (dev_ll->vdev->dev->device_fh ==
dev->device_fh) {
LOG_DEBUG(VHOST_DATA,
"(%"PRIu64") TX: Source and destination"
" MAC addresses are the same. Dropping "
"packet.\n",
- dev_ll->dev->device_fh);
+ dev_ll->vdev->device_fh);
+ rte_pktmbuf_free(m);
return;
}
offset = 4;
vlan_tag =
(uint16_t)
- vlan_tags[(uint16_t)dev_ll->dev->device_fh];
+
vlan_tags[(uint16_t)dev_ll->vdev->dev->device_fh];
LOG_DEBUG(VHOST_DATA,
"(%"PRIu64") TX: pkt to local VM device id:"
"(%"PRIu64") vlan tag: %d.\n",
- dev->device_fh, dev_ll->dev->device_fh,
+ dev->device_fh, dev_ll->vdev->dev->device_fh,
vlan_tag);
break;
@@ -1639,55 +1102,12 @@ virtio_tx_route(struct virtio_net* dev, struct rte_mbuf
*m, struct rte_mempool *
tx_q = &lcore_tx_queue[lcore_id];
len = tx_q->len;
- /* Allocate an mbuf and populate the structure. */
- mbuf = rte_pktmbuf_alloc(mbuf_pool);
- if (unlikely(mbuf == NULL)) {
- RTE_LOG(ERR, VHOST_DATA,
- "Failed to allocate memory for mbuf.\n");
- return;
- }
-
- mbuf->pkt.data_len = m->pkt.data_len + VLAN_HLEN + offset;
- mbuf->pkt.pkt_len = m->pkt.pkt_len + VLAN_HLEN + offset;
- mbuf->pkt.nb_segs = m->pkt.nb_segs;
-
- /* Copy ethernet header to mbuf. */
- rte_memcpy((void*)mbuf->pkt.data, (const void*)m->pkt.data, ETH_HLEN);
-
-
- /* Setup vlan header. Bytes need to be re-ordered for network with
htons()*/
- vlan_hdr = (struct vlan_ethhdr *) mbuf->pkt.data;
- vlan_hdr->h_vlan_encapsulated_proto = vlan_hdr->h_vlan_proto;
- vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
- vlan_hdr->h_vlan_TCI = htons(vlan_tag);
-
- /* Copy the remaining packet contents to the mbuf. */
- rte_memcpy((void*) ((uint8_t*)mbuf->pkt.data + VLAN_ETH_HLEN),
- (const void*) ((uint8_t*)m->pkt.data + ETH_HLEN),
(m->pkt.data_len - ETH_HLEN));
-
- /* Copy the remaining segments for the whole packet. */
- prev = mbuf;
- while (m->pkt.next) {
- /* Allocate an mbuf and populate the structure. */
- struct rte_mbuf *next_mbuf = rte_pktmbuf_alloc(mbuf_pool);
- if (unlikely(next_mbuf == NULL)) {
- rte_pktmbuf_free(mbuf);
- RTE_LOG(ERR, VHOST_DATA,
- "Failed to allocate memory for mbuf.\n");
- return;
- }
-
- m = m->pkt.next;
- prev->pkt.next = next_mbuf;
- prev = next_mbuf;
- next_mbuf->pkt.data_len = m->pkt.data_len;
+ m->ol_flags = PKT_TX_VLAN_PKT;
+ m->pkt.data_len += offset;
+ m->pkt.pkt_len = m->pkt.data_len;
+ m->pkt.vlan_macip.f.vlan_tci = vlan_tag;
- /* Copy data to next mbuf. */
- rte_memcpy(rte_pktmbuf_mtod(next_mbuf, void *),
- rte_pktmbuf_mtod(m, const void *), m->pkt.data_len);
- }
-
- tx_q->m_table[len] = mbuf;
+ tx_q->m_table[len] = m;
len++;
if (enable_stats) {
dev_statistics[dev->device_fh].tx_total++;
@@ -1710,321 +1130,6 @@ virtio_tx_route(struct virtio_net* dev, struct rte_mbuf
*m, struct rte_mempool *
tx_q->len = len;
return;
}
-
-static inline void __attribute__((always_inline))
-virtio_dev_tx(struct virtio_net* dev, struct rte_mempool *mbuf_pool)
-{
- struct rte_mbuf m;
- struct vhost_virtqueue *vq;
- struct vring_desc *desc;
- uint64_t buff_addr = 0;
- uint32_t head[MAX_PKT_BURST];
- uint32_t used_idx;
- uint32_t i;
- uint16_t free_entries, packet_success = 0;
- uint16_t avail_idx;
-
- vq = dev->virtqueue[VIRTIO_TXQ];
- avail_idx = *((volatile uint16_t *)&vq->avail->idx);
-
- /* If there are no available buffers then return. */
- if (vq->last_used_idx == avail_idx)
- return;
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_tx()\n", dev->device_fh);
-
- /* Prefetch available ring to retrieve head indexes. */
- rte_prefetch0(&vq->avail->ring[vq->last_used_idx & (vq->size - 1)]);
-
- /*get the number of free entries in the ring*/
- free_entries = (avail_idx - vq->last_used_idx);
-
- /* Limit to MAX_PKT_BURST. */
- if (free_entries > MAX_PKT_BURST)
- free_entries = MAX_PKT_BURST;
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Buffers available %d\n",
dev->device_fh, free_entries);
- /* Retrieve all of the head indexes first to avoid caching issues. */
- for (i = 0; i < free_entries; i++)
- head[i] = vq->avail->ring[(vq->last_used_idx + i) & (vq->size -
1)];
-
- /* Prefetch descriptor index. */
- rte_prefetch0(&vq->desc[head[packet_success]]);
- rte_prefetch0(&vq->used->ring[vq->last_used_idx & (vq->size - 1)]);
-
- while (packet_success < free_entries) {
- desc = &vq->desc[head[packet_success]];
-
- /* Discard first buffer as it is the virtio header */
- desc = &vq->desc[desc->next];
-
- /* Buffer address translation. */
- buff_addr = gpa_to_vva(dev, desc->addr);
- /* Prefetch buffer address. */
- rte_prefetch0((void*)(uintptr_t)buff_addr);
-
- used_idx = vq->last_used_idx & (vq->size - 1);
-
- if (packet_success < (free_entries - 1)) {
- /* Prefetch descriptor index. */
- rte_prefetch0(&vq->desc[head[packet_success+1]]);
- rte_prefetch0(&vq->used->ring[(used_idx + 1) &
(vq->size - 1)]);
- }
-
- /* Update used index buffer information. */
- vq->used->ring[used_idx].id = head[packet_success];
- vq->used->ring[used_idx].len = 0;
-
- /* Setup dummy mbuf. This is copied to a real mbuf if
transmitted out the physical port. */
- m.pkt.data_len = desc->len;
- m.pkt.pkt_len = desc->len;
- m.pkt.data = (void*)(uintptr_t)buff_addr;
-
- PRINT_PACKET(dev, (uintptr_t)buff_addr, desc->len, 0);
-
- /* If this is the first received packet we need to learn the
MAC and setup VMDQ */
- if (dev->ready == DEVICE_MAC_LEARNING) {
- if (dev->remove || (link_vmdq(dev, &m) == -1)) {
- /*discard frame if device is scheduled for
removal or a duplicate MAC address is found. */
- packet_success += free_entries;
- vq->last_used_idx += packet_success;
- break;
- }
- }
- virtio_tx_route(dev, &m, mbuf_pool, (uint16_t)dev->device_fh);
-
- vq->last_used_idx++;
- packet_success++;
- }
-
- rte_compiler_barrier();
- vq->used->idx += packet_success;
- /* Kick guest if required. */
- if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- eventfd_write((int)vq->kickfd, 1);
-}
-
-/* This function works for TX packets with mergeable feature enabled. */
-static inline void __attribute__((always_inline))
-virtio_dev_merge_tx(struct virtio_net *dev, struct rte_mempool *mbuf_pool)
-{
- struct rte_mbuf *m, *prev;
- struct vhost_virtqueue *vq;
- struct vring_desc *desc;
- uint64_t vb_addr = 0;
- uint32_t head[MAX_PKT_BURST];
- uint32_t used_idx;
- uint32_t i;
- uint16_t free_entries, entry_success = 0;
- uint16_t avail_idx;
- uint32_t buf_size = MBUF_SIZE - (sizeof(struct rte_mbuf)
- + RTE_PKTMBUF_HEADROOM);
-
- vq = dev->virtqueue[VIRTIO_TXQ];
- avail_idx = *((volatile uint16_t *)&vq->avail->idx);
-
- /* If there are no available buffers then return. */
- if (vq->last_used_idx == avail_idx)
- return;
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_merge_tx()\n",
- dev->device_fh);
-
- /* Prefetch available ring to retrieve head indexes. */
- rte_prefetch0(&vq->avail->ring[vq->last_used_idx & (vq->size - 1)]);
-
- /*get the number of free entries in the ring*/
- free_entries = (avail_idx - vq->last_used_idx);
-
- /* Limit to MAX_PKT_BURST. */
- free_entries = RTE_MIN(free_entries, MAX_PKT_BURST);
-
- LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Buffers available %d\n",
- dev->device_fh, free_entries);
- /* Retrieve all of the head indexes first to avoid caching issues. */
- for (i = 0; i < free_entries; i++)
- head[i] = vq->avail->ring[(vq->last_used_idx + i) & (vq->size -
1)];
-
- /* Prefetch descriptor index. */
- rte_prefetch0(&vq->desc[head[entry_success]]);
- rte_prefetch0(&vq->used->ring[vq->last_used_idx & (vq->size - 1)]);
-
- while (entry_success < free_entries) {
- uint32_t vb_avail, vb_offset;
- uint32_t seg_avail, seg_offset;
- uint32_t cpy_len;
- uint32_t seg_num = 0;
- struct rte_mbuf *cur;
- uint8_t alloc_err = 0;
-
- desc = &vq->desc[head[entry_success]];
-
- /* Discard first buffer as it is the virtio header */
- desc = &vq->desc[desc->next];
-
- /* Buffer address translation. */
- vb_addr = gpa_to_vva(dev, desc->addr);
- /* Prefetch buffer address. */
- rte_prefetch0((void *)(uintptr_t)vb_addr);
-
- used_idx = vq->last_used_idx & (vq->size - 1);
-
- if (entry_success < (free_entries - 1)) {
- /* Prefetch descriptor index. */
- rte_prefetch0(&vq->desc[head[entry_success+1]]);
- rte_prefetch0(&vq->used->ring[(used_idx + 1) &
(vq->size - 1)]);
- }
-
- /* Update used index buffer information. */
- vq->used->ring[used_idx].id = head[entry_success];
- vq->used->ring[used_idx].len = 0;
-
- vb_offset = 0;
- vb_avail = desc->len;
- seg_offset = 0;
- seg_avail = buf_size;
- cpy_len = RTE_MIN(vb_avail, seg_avail);
-
- PRINT_PACKET(dev, (uintptr_t)vb_addr, desc->len, 0);
-
- /* Allocate an mbuf and populate the structure. */
- m = rte_pktmbuf_alloc(mbuf_pool);
- if (unlikely(m == NULL)) {
- RTE_LOG(ERR, VHOST_DATA,
- "Failed to allocate memory for mbuf.\n");
- return;
- }
-
- seg_num++;
- cur = m;
- prev = m;
- while (cpy_len != 0) {
- rte_memcpy((void *)(rte_pktmbuf_mtod(cur, char *) +
seg_offset),
- (void *)((uintptr_t)(vb_addr + vb_offset)),
- cpy_len);
-
- seg_offset += cpy_len;
- vb_offset += cpy_len;
- vb_avail -= cpy_len;
- seg_avail -= cpy_len;
-
- if (vb_avail != 0) {
- /*
- * The segment reachs to its end,
- * while the virtio buffer in TX vring has
- * more data to be copied.
- */
- cur->pkt.data_len = seg_offset;
- m->pkt.pkt_len += seg_offset;
- /* Allocate mbuf and populate the structure. */
- cur = rte_pktmbuf_alloc(mbuf_pool);
- if (unlikely(cur == NULL)) {
- RTE_LOG(ERR, VHOST_DATA, "Failed to "
- "allocate memory for mbuf.\n");
- rte_pktmbuf_free(m);
- alloc_err = 1;
- break;
- }
-
- seg_num++;
- prev->pkt.next = cur;
- prev = cur;
- seg_offset = 0;
- seg_avail = buf_size;
- } else {
- if (desc->flags & VRING_DESC_F_NEXT) {
- /*
- * There are more virtio buffers in
- * same vring entry need to be copied.
- */
- if (seg_avail == 0) {
- /*
- * The current segment hasn't
- * room to accomodate more
- * data.
- */
- cur->pkt.data_len = seg_offset;
- m->pkt.pkt_len += seg_offset;
- /*
- * Allocate an mbuf and
- * populate the structure.
- */
- cur =
rte_pktmbuf_alloc(mbuf_pool);
- if (unlikely(cur == NULL)) {
- RTE_LOG(ERR,
- VHOST_DATA,
- "Failed to "
- "allocate
memory "
- "for mbuf\n");
- rte_pktmbuf_free(m);
- alloc_err = 1;
- break;
- }
- seg_num++;
- prev->pkt.next = cur;
- prev = cur;
- seg_offset = 0;
- seg_avail = buf_size;
- }
-
- desc = &vq->desc[desc->next];
-
- /* Buffer address translation. */
- vb_addr = gpa_to_vva(dev, desc->addr);
- /* Prefetch buffer address. */
- rte_prefetch0((void
*)(uintptr_t)vb_addr);
- vb_offset = 0;
- vb_avail = desc->len;
-
- PRINT_PACKET(dev, (uintptr_t)vb_addr,
- desc->len, 0);
- } else {
- /* The whole packet completes. */
- cur->pkt.data_len = seg_offset;
- m->pkt.pkt_len += seg_offset;
- vb_avail = 0;
- }
- }
-
- cpy_len = RTE_MIN(vb_avail, seg_avail);
- }
-
- if (unlikely(alloc_err == 1))
- break;
-
- m->pkt.nb_segs = seg_num;
-
- /*
- * If this is the first received packet we need to learn
- * the MAC and setup VMDQ
- */
- if (dev->ready == DEVICE_MAC_LEARNING) {
- if (dev->remove || (link_vmdq(dev, m) == -1)) {
- /*
- * Discard frame if device is scheduled for
- * removal or a duplicate MAC address is found.
- */
- entry_success = free_entries;
- vq->last_used_idx += entry_success;
- rte_pktmbuf_free(m);
- break;
- }
- }
-
- virtio_tx_route(dev, m, mbuf_pool, (uint16_t)dev->device_fh);
- vq->last_used_idx++;
- entry_success++;
- rte_pktmbuf_free(m);
- }
-
- rte_compiler_barrier();
- vq->used->idx += entry_success;
- /* Kick guest if required. */
- if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
- eventfd_write((int)vq->kickfd, 1);
-
-}
-
/*
* This function is called by each data core. It handles all RX/TX registered
with the
* core. For TX the specific lcore linked list is used. For RX, MAC addresses
are compared
@@ -2035,6 +1140,7 @@ switch_worker(__attribute__((unused)) void *arg)
{
struct rte_mempool *mbuf_pool = arg;
struct virtio_net *dev = NULL;
+ struct vhost_dev *vdev = NULL;
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
struct virtio_net_data_ll *dev_ll;
struct mbuf_table *tx_q;
@@ -2045,7 +1151,8 @@ switch_worker(__attribute__((unused)) void *arg)
const uint16_t lcore_id = rte_lcore_id();
const uint16_t num_cores = (uint16_t)rte_lcore_count();
uint16_t rx_count = 0;
- uint32_t mergeable = 0;
+ uint16_t tx_count;
+ uint32_t retry = 0;
RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
lcore_ll = lcore_info[lcore_id].lcore_ll;
@@ -2102,37 +1209,39 @@ switch_worker(__attribute__((unused)) void *arg)
while (dev_ll != NULL) {
/*get virtio device ID*/
- dev = dev_ll->dev;
- mergeable =
- dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF);
+ vdev = dev_ll->vdev;
+ dev = vdev->dev;
- if (dev->remove) {
+ if (vdev->remove) {
dev_ll = dev_ll->next;
- unlink_vmdq(dev);
- dev->ready = DEVICE_SAFE_REMOVE;
+ unlink_vmdq(vdev);
+ vdev->ready = DEVICE_SAFE_REMOVE;
continue;
}
- if (likely(dev->ready == DEVICE_RX)) {
+ if (likely(vdev->ready == DEVICE_RX)) {
/*Handle guest RX*/
rx_count = rte_eth_rx_burst(ports[0],
- (uint16_t)dev->vmdq_rx_q, pkts_burst,
MAX_PKT_BURST);
+ vdev->vmdq_rx_q, pkts_burst,
MAX_PKT_BURST);
if (rx_count) {
- if (likely(mergeable == 0))
- ret_count =
- virtio_dev_rx(dev,
- pkts_burst, rx_count);
- else
- ret_count =
- virtio_dev_merge_rx(dev,
- pkts_burst, rx_count);
-
+ /*
+ * Retry is enabled and the queue is
full then we wait and retry to avoid packet loss
+ * Here MAX_PKT_BURST must be less than
virtio queue size
+ */
+ if (enable_retry && unlikely(rx_count >
rte_vring_available_entries(dev, VIRTIO_RXQ))) {
+ for (retry = 0; retry <
burst_rx_retry_num; retry++) {
+
rte_delay_us(burst_rx_delay_time);
+ if (rx_count <=
rte_vring_available_entries(dev, VIRTIO_RXQ))
+ break;
+ }
+ }
+ ret_count =
rte_vhost_enqueue_burst(dev, VIRTIO_RXQ, pkts_burst, rx_count);
if (enable_stats) {
rte_atomic64_add(
-
&dev_statistics[dev_ll->dev->device_fh].rx_total_atomic,
+
&dev_statistics[dev_ll->vdev->dev->device_fh].rx_total_atomic,
rx_count);
rte_atomic64_add(
-
&dev_statistics[dev_ll->dev->device_fh].rx_atomic, ret_count);
+
&dev_statistics[dev_ll->vdev->dev->device_fh].rx_atomic, ret_count);
}
while (likely(rx_count)) {
rx_count--;
@@ -2142,12 +1251,18 @@ switch_worker(__attribute__((unused)) void *arg)
}
}
- if (!dev->remove) {
- /*Handle guest TX*/
- if (likely(mergeable == 0))
- virtio_dev_tx(dev, mbuf_pool);
- else
- virtio_dev_merge_tx(dev, mbuf_pool);
+ if (!vdev->remove) {
+ /* Handle guest TX*/
+ tx_count = rte_vhost_dequeue_burst(dev,
VIRTIO_TXQ, mbuf_pool, pkts_burst, MAX_PKT_BURST);
+ /* If this is the first received packet we need
to learn the MAC and setup VMDQ */
+ if (unlikely(vdev->ready ==
DEVICE_MAC_LEARNING) && tx_count) {
+ if (vdev->remove || (link_vmdq(vdev,
pkts_burst[0]) == -1)) {
+ while (tx_count--)
+
rte_pktmbuf_free(pkts_burst[tx_count]);
+ }
+ }
+ while (tx_count)
+ virtio_tx_route(vdev,
pkts_burst[--tx_count], mbuf_pool, (uint16_t)dev->device_fh);
}
/*move to the next device in the list*/
@@ -2264,12 +1379,13 @@ attach_rxmbuf_zcp(struct virtio_net *dev)
struct rte_mbuf *mbuf = NULL;
struct vpool *vpool;
hpa_type addr_type;
+ struct vhost_dev *vdev = (struct vhost_dev *)dev->priv;
- vpool = &vpool_array[dev->vmdq_rx_q];
+ vpool = &vpool_array[vdev->vmdq_rx_q];
vq = dev->virtqueue[VIRTIO_RXQ];
do {
- if (unlikely(get_available_ring_index_zcp(dev, &res_base_idx,
+ if (unlikely(get_available_ring_index_zcp(vdev->dev,
&res_base_idx,
1) != 1))
return;
desc_idx = vq->avail->ring[(res_base_idx) & (vq->size - 1)];
@@ -2278,12 +1394,12 @@ attach_rxmbuf_zcp(struct virtio_net *dev)
if (desc->flags & VRING_DESC_F_NEXT) {
desc = &vq->desc[desc->next];
buff_addr = gpa_to_vva(dev, desc->addr);
- phys_addr = gpa_to_hpa(dev, desc->addr, desc->len,
+ phys_addr = gpa_to_hpa(vdev, desc->addr, desc->len,
&addr_type);
} else {
buff_addr = gpa_to_vva(dev,
desc->addr + vq->vhost_hlen);
- phys_addr = gpa_to_hpa(dev,
+ phys_addr = gpa_to_hpa(vdev,
desc->addr + vq->vhost_hlen,
desc->len, &addr_type);
}
@@ -2606,13 +1722,14 @@ virtio_tx_route_zcp(struct virtio_net *dev, struct
rte_mbuf *m,
struct virtio_net_data_ll *dev_ll = ll_root_used;
struct ether_hdr *pkt_hdr = (struct ether_hdr *)m->pkt.data;
uint16_t vlan_tag = (uint16_t)vlan_tags[(uint16_t)dev->device_fh];
+ uint16_t vmdq_rx_q = ((struct vhost_dev *)dev->priv)->vmdq_rx_q;
/*Add packet to the port tx queue*/
- tx_q = &tx_queue_zcp[(uint16_t)dev->vmdq_rx_q];
+ tx_q = &tx_queue_zcp[vmdq_rx_q];
len = tx_q->len;
/* Allocate an mbuf and populate the structure. */
- vpool = &vpool_array[MAX_QUEUES + (uint16_t)dev->vmdq_rx_q];
+ vpool = &vpool_array[MAX_QUEUES + vmdq_rx_q];
rte_ring_sc_dequeue(vpool->ring, (void **)&mbuf);
if (unlikely(mbuf == NULL)) {
struct vhost_virtqueue *vq = dev->virtqueue[VIRTIO_TXQ];
@@ -2633,15 +1750,15 @@ virtio_tx_route_zcp(struct virtio_net *dev, struct
rte_mbuf *m,
*/
vlan_tag = external_pkt_default_vlan_tag;
while (dev_ll != NULL) {
- if (likely(dev_ll->dev->ready == DEVICE_RX) &&
+ if (likely(dev_ll->vdev->ready == DEVICE_RX) &&
ether_addr_cmp(&(pkt_hdr->d_addr),
- &dev_ll->dev->mac_address)) {
+ &dev_ll->vdev->mac_address)) {
/*
* Drop the packet if the TX packet is destined
* for the TX device.
*/
- if (unlikely(dev_ll->dev->device_fh
+ if (unlikely(dev_ll->vdev->dev->device_fh
== dev->device_fh)) {
LOG_DEBUG(VHOST_DATA,
"(%"PRIu64") TX: Source and destination"
@@ -2661,7 +1778,7 @@ virtio_tx_route_zcp(struct virtio_net *dev, struct
rte_mbuf *m,
offset = 4;
vlan_tag =
(uint16_t)
- vlan_tags[(uint16_t)dev_ll->dev->device_fh];
+
vlan_tags[(uint16_t)dev_ll->vdev->dev->device_fh];
LOG_DEBUG(VHOST_DATA,
"(%"PRIu64") TX: pkt to local VM device id:"
@@ -2751,6 +1868,7 @@ virtio_dev_tx_zcp(struct virtio_net *dev)
uint16_t avail_idx;
uint8_t need_copy = 0;
hpa_type addr_type;
+ struct vhost_dev *vdev = (struct vhost_dev *)dev->priv;
vq = dev->virtqueue[VIRTIO_TXQ];
avail_idx = *((volatile uint16_t *)&vq->avail->idx);
@@ -2794,7 +1912,7 @@ virtio_dev_tx_zcp(struct virtio_net *dev)
/* Buffer address translation. */
buff_addr = gpa_to_vva(dev, desc->addr);
- phys_addr = gpa_to_hpa(dev, desc->addr, desc->len, &addr_type);
+ phys_addr = gpa_to_hpa(vdev, desc->addr, desc->len, &addr_type);
if (likely(packet_success < (free_entries - 1)))
/* Prefetch descriptor index. */
@@ -2843,8 +1961,8 @@ virtio_dev_tx_zcp(struct virtio_net *dev)
* If this is the first received packet we need to learn
* the MAC and setup VMDQ
*/
- if (unlikely(dev->ready == DEVICE_MAC_LEARNING)) {
- if (dev->remove || (link_vmdq(dev, &m) == -1)) {
+ if (unlikely(vdev->ready == DEVICE_MAC_LEARNING)) {
+ if (vdev->remove || (link_vmdq(vdev, &m) == -1)) {
/*
* Discard frame if device is scheduled for
* removal or a duplicate MAC address is found.
@@ -2869,6 +1987,7 @@ static int
switch_worker_zcp(__attribute__((unused)) void *arg)
{
struct virtio_net *dev = NULL;
+ struct vhost_dev *vdev = NULL;
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
struct virtio_net_data_ll *dev_ll;
struct mbuf_table *tx_q;
@@ -2897,12 +2016,13 @@ switch_worker_zcp(__attribute__((unused)) void *arg)
* put back into vpool.ring.
*/
dev_ll = lcore_ll->ll_root_used;
- while ((dev_ll != NULL) && (dev_ll->dev != NULL)) {
+ while ((dev_ll != NULL) && (dev_ll->vdev != NULL)) {
/* Get virtio device ID */
- dev = dev_ll->dev;
+ vdev = dev_ll->vdev;
+ dev = vdev->dev;
- if (likely(!dev->remove)) {
- tx_q =
&tx_queue_zcp[(uint16_t)dev->vmdq_rx_q];
+ if (likely(!vdev->remove)) {
+ tx_q =
&tx_queue_zcp[(uint16_t)vdev->vmdq_rx_q];
if (tx_q->len) {
LOG_DEBUG(VHOST_DATA,
"TX queue drained after timeout"
@@ -2927,7 +2047,7 @@ switch_worker_zcp(__attribute__((unused)) void *arg)
tx_q->len = 0;
txmbuf_clean_zcp(dev,
-
&vpool_array[MAX_QUEUES+dev->vmdq_rx_q]);
+ &vpool_array[MAX_QUEUES
+ vdev->vmdq_rx_q]);
}
}
dev_ll = dev_ll->next;
@@ -2947,17 +2067,18 @@ switch_worker_zcp(__attribute__((unused)) void *arg)
/* Process devices */
dev_ll = lcore_ll->ll_root_used;
- while ((dev_ll != NULL) && (dev_ll->dev != NULL)) {
- dev = dev_ll->dev;
- if (unlikely(dev->remove)) {
+ while ((dev_ll != NULL) && (dev_ll->vdev != NULL)) {
+ vdev = dev_ll->vdev;
+ dev = vdev->dev;
+ if (unlikely(vdev->remove)) {
dev_ll = dev_ll->next;
- unlink_vmdq(dev);
- dev->ready = DEVICE_SAFE_REMOVE;
+ unlink_vmdq(vdev);
+ vdev->ready = DEVICE_SAFE_REMOVE;
continue;
}
- if (likely(dev->ready == DEVICE_RX)) {
- uint32_t index = dev->vmdq_rx_q;
+ if (likely(vdev->ready == DEVICE_RX)) {
+ uint32_t index = vdev->vmdq_rx_q;
uint16_t i;
count_in_ring
= rte_ring_count(vpool_array[index].ring);
@@ -2976,7 +2097,7 @@ switch_worker_zcp(__attribute__((unused)) void *arg)
/* Handle guest RX */
rx_count = rte_eth_rx_burst(ports[0],
- (uint16_t)dev->vmdq_rx_q, pkts_burst,
+ vdev->vmdq_rx_q, pkts_burst,
MAX_PKT_BURST);
if (rx_count) {
@@ -2999,7 +2120,7 @@ switch_worker_zcp(__attribute__((unused)) void *arg)
}
}
- if (likely(!dev->remove))
+ if (likely(!vdev->remove))
/* Handle guest TX */
virtio_dev_tx_zcp(dev);
@@ -3112,7 +2233,7 @@ alloc_data_ll(uint32_t size)
}
for (i = 0; i < size - 1; i++) {
- ll_new[i].dev = NULL;
+ ll_new[i].vdev = NULL;
ll_new[i].next = &ll_new[i+1];
}
ll_new[i].next = NULL;
@@ -3152,42 +2273,32 @@ init_data_ll (void)
}
/*
- * Set virtqueue flags so that we do not receive interrupts.
- */
-static void
-set_irq_status (struct virtio_net *dev)
-{
- dev->virtqueue[VIRTIO_RXQ]->used->flags = VRING_USED_F_NO_NOTIFY;
- dev->virtqueue[VIRTIO_TXQ]->used->flags = VRING_USED_F_NO_NOTIFY;
-}
-
-/*
* Remove a device from the specific data core linked list and from the main
linked list. Synchonization
* occurs through the use of the lcore dev_removal_flag. Device is made
volatile here to avoid re-ordering
* of dev->remove=1 which can cause an infinite loop in the rte_pause loop.
*/
static void
-destroy_device (volatile struct virtio_net *dev)
+destroy_device(struct virtio_net *dev)
{
struct virtio_net_data_ll *ll_lcore_dev_cur;
struct virtio_net_data_ll *ll_main_dev_cur;
struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
struct virtio_net_data_ll *ll_main_dev_last = NULL;
+ struct vhost_dev *vdev;
int lcore;
dev->flags &= ~VIRTIO_DEV_RUNNING;
+ vdev = (struct vhost_dev *)dev->priv;
/*set the remove flag. */
- dev->remove = 1;
-
- while(dev->ready != DEVICE_SAFE_REMOVE) {
+ vdev->remove = 1;
+ while (vdev->ready != DEVICE_SAFE_REMOVE)
rte_pause();
- }
/* Search for entry to be removed from lcore ll */
- ll_lcore_dev_cur = lcore_info[dev->coreid].lcore_ll->ll_root_used;
+ ll_lcore_dev_cur = lcore_info[vdev->coreid].lcore_ll->ll_root_used;
while (ll_lcore_dev_cur != NULL) {
- if (ll_lcore_dev_cur->dev == dev) {
+ if (ll_lcore_dev_cur->vdev == vdev) {
break;
} else {
ll_lcore_dev_last = ll_lcore_dev_cur;
@@ -3206,7 +2317,7 @@ destroy_device (volatile struct virtio_net *dev)
ll_main_dev_cur = ll_root_used;
ll_main_dev_last = NULL;
while (ll_main_dev_cur != NULL) {
- if (ll_main_dev_cur->dev == dev) {
+ if (ll_main_dev_cur->vdev == vdev) {
break;
} else {
ll_main_dev_last = ll_main_dev_cur;
@@ -3215,7 +2326,7 @@ destroy_device (volatile struct virtio_net *dev)
}
/* Remove entries from the lcore and main ll. */
-
rm_data_ll_entry(&lcore_info[ll_lcore_dev_cur->dev->coreid].lcore_ll->ll_root_used,
ll_lcore_dev_cur, ll_lcore_dev_last);
+ rm_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
ll_lcore_dev_cur, ll_lcore_dev_last);
rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
/* Set the dev_removal_flag on each lcore. */
@@ -3235,19 +2346,19 @@ destroy_device (volatile struct virtio_net *dev)
}
/* Add the entries back to the lcore and main free ll.*/
-
put_data_ll_free_entry(&lcore_info[ll_lcore_dev_cur->dev->coreid].lcore_ll->ll_root_free,
ll_lcore_dev_cur);
+
put_data_ll_free_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_free,
ll_lcore_dev_cur);
put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
/* Decrement number of device on the lcore. */
- lcore_info[ll_lcore_dev_cur->dev->coreid].lcore_ll->device_num--;
+ lcore_info[vdev->coreid].lcore_ll->device_num--;
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been removed from
data core\n", dev->device_fh);
if (zero_copy) {
- struct vpool *vpool = &vpool_array[dev->vmdq_rx_q];
+ struct vpool *vpool = &vpool_array[vdev->vmdq_rx_q];
/* Stop the RX queue. */
- if (rte_eth_dev_rx_queue_stop(ports[0], dev->vmdq_rx_q) != 0) {
+ if (rte_eth_dev_rx_queue_stop(ports[0], vdev->vmdq_rx_q) != 0) {
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") In destroy_device: Failed to stop "
"rx queue:%d\n",
@@ -3263,24 +2374,173 @@ destroy_device (volatile struct virtio_net *dev)
mbuf_destroy_zcp(vpool);
/* Stop the TX queue. */
- if (rte_eth_dev_tx_queue_stop(ports[0], dev->vmdq_rx_q) != 0) {
+ if (rte_eth_dev_tx_queue_stop(ports[0], vdev->vmdq_rx_q) != 0) {
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") In destroy_device: Failed to "
"stop tx queue:%d\n",
dev->device_fh, dev->vmdq_rx_q);
}
- vpool = &vpool_array[dev->vmdq_rx_q + MAX_QUEUES];
+ vpool = &vpool_array[vdev->vmdq_rx_q + MAX_QUEUES];
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") destroy_device: Start put mbuf in mempool "
"back to ring for TX queue: %d, dev:(%"PRIu64")\n",
- dev->device_fh, (dev->vmdq_rx_q + MAX_QUEUES),
+ dev->device_fh, (vdev->vmdq_rx_q + MAX_QUEUES),
dev->device_fh);
mbuf_destroy_zcp(vpool);
+ rte_free(vdev->regions_hpa);
+ }
+ rte_free(vdev);
+
+}
+
+/*
+ * Calculate the region count of physical continous regions for one particular
+ * region of whose vhost virtual address is continous. The particular region
+ * start from vva_start, with size of 'size' in argument.
+ */
+static uint32_t
+check_hpa_regions(uint64_t vva_start, uint64_t size)
+{
+ uint32_t i, nregions = 0, page_size = getpagesize();
+ uint64_t cur_phys_addr = 0, next_phys_addr = 0;
+ if (vva_start % page_size) {
+ LOG_DEBUG(VHOST_CONFIG,
+ "in check_countinous: vva start(%p) mod page_size(%d) "
+ "has remainder\n",
+ (void *)(uintptr_t)vva_start, page_size);
+ return 0;
+ }
+ if (size % page_size) {
+ LOG_DEBUG(VHOST_CONFIG,
+ "in check_countinous: "
+ "size((%"PRIu64")) mod page_size(%d) has remainder\n",
+ size, page_size);
+ return 0;
+ }
+ for (i = 0; i < size - page_size; i = i + page_size) {
+ cur_phys_addr
+ = rte_mem_virt2phy((void *)(uintptr_t)(vva_start + i));
+ next_phys_addr = rte_mem_virt2phy(
+ (void *)(uintptr_t)(vva_start + i + page_size));
+ if ((cur_phys_addr + page_size) != next_phys_addr) {
+ ++nregions;
+ LOG_DEBUG(VHOST_CONFIG,
+ "in check_continuous: hva addr:(%p) is not "
+ "continuous with hva addr:(%p), diff:%d\n",
+ (void *)(uintptr_t)(vva_start + (uint64_t)i),
+ (void *)(uintptr_t)(vva_start + (uint64_t)i
+ + page_size), page_size);
+ LOG_DEBUG(VHOST_CONFIG,
+ "in check_continuous: hpa addr:(%p) is not "
+ "continuous with hpa addr:(%p), "
+ "diff:(%"PRIu64")\n",
+ (void *)(uintptr_t)cur_phys_addr,
+ (void *)(uintptr_t)next_phys_addr,
+ (next_phys_addr-cur_phys_addr));
+ }
}
+ return nregions;
+}
+/*
+ * Divide each region whose vhost virtual address is continous into a few
+ * sub-regions, make sure the physical address within each sub-region are
+ * continous. And fill offset(to GPA) and size etc. information of each
+ * sub-region into regions_hpa.
+ */
+static uint32_t
+fill_hpa_memory_regions(struct virtio_memory_regions_hpa *mem_region_hpa,
struct virtio_memory *virtio_memory)
+{
+ uint32_t regionidx, regionidx_hpa = 0, i, k, page_size = getpagesize();
+ uint64_t cur_phys_addr = 0, next_phys_addr = 0, vva_start;
+
+ if (mem_region_hpa == NULL)
+ return 0;
+
+ for (regionidx = 0; regionidx < virtio_memory->nregions; regionidx++) {
+ vva_start =
virtio_memory->regions[regionidx].guest_phys_address +
+ virtio_memory->regions[regionidx].address_offset;
+ mem_region_hpa[regionidx_hpa].guest_phys_address
+ = virtio_memory->regions[regionidx].guest_phys_address;
+ mem_region_hpa[regionidx_hpa].host_phys_addr_offset =
+ rte_mem_virt2phy((void *)(uintptr_t)(vva_start)) -
+ mem_region_hpa[regionidx_hpa].guest_phys_address;
+ LOG_DEBUG(VHOST_CONFIG,
+ "in fill_hpa_regions: guest phys addr start[%d]:(%p)\n",
+ regionidx_hpa,
+ (void *)(uintptr_t)
+ (mem_region_hpa[regionidx_hpa].guest_phys_address));
+ LOG_DEBUG(VHOST_CONFIG,
+ "in fill_hpa_regions: host phys addr start[%d]:(%p)\n",
+ regionidx_hpa,
+ (void *)(uintptr_t)
+ (mem_region_hpa[regionidx_hpa].host_phys_addr_offset));
+ for (i = 0, k = 0;
+ i < virtio_memory->regions[regionidx].memory_size -
+ page_size;
+ i += page_size) {
+ cur_phys_addr = rte_mem_virt2phy(
+ (void *)(uintptr_t)(vva_start + i));
+ next_phys_addr = rte_mem_virt2phy(
+ (void *)(uintptr_t)(vva_start +
+ i + page_size));
+ if ((cur_phys_addr + page_size) != next_phys_addr) {
+
mem_region_hpa[regionidx_hpa].guest_phys_address_end =
+
mem_region_hpa[regionidx_hpa].guest_phys_address +
+ k + page_size;
+ mem_region_hpa[regionidx_hpa].memory_size
+ = k + page_size;
+ LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions:
guest "
+ "phys addr end [%d]:(%p)\n",
+ regionidx_hpa,
+ (void *)(uintptr_t)
+
(mem_region_hpa[regionidx_hpa].guest_phys_address_end));
+ LOG_DEBUG(VHOST_CONFIG,
+ "in fill_hpa_regions: guest phys addr "
+ "size [%d]:(%p)\n",
+ regionidx_hpa,
+ (void *)(uintptr_t)
+
(mem_region_hpa[regionidx_hpa].memory_size));
+ mem_region_hpa[regionidx_hpa +
1].guest_phys_address
+ =
mem_region_hpa[regionidx_hpa].guest_phys_address_end;
+ ++regionidx_hpa;
+
mem_region_hpa[regionidx_hpa].host_phys_addr_offset =
+ next_phys_addr -
+
mem_region_hpa[regionidx_hpa].guest_phys_address;
+ LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions:
guest"
+ " phys addr start[%d]:(%p)\n",
+ regionidx_hpa,
+ (void *)(uintptr_t)
+
(mem_region_hpa[regionidx_hpa].guest_phys_address));
+ LOG_DEBUG(VHOST_CONFIG,
+ "in fill_hpa_regions: host phys addr "
+ "start[%d]:(%p)\n",
+ regionidx_hpa,
+ (void *)(uintptr_t)
+
(mem_region_hpa[regionidx_hpa].host_phys_addr_offset));
+ k = 0;
+ } else {
+ k += page_size;
+ }
+ }
+ mem_region_hpa[regionidx_hpa].guest_phys_address_end
+ = mem_region_hpa[regionidx_hpa].guest_phys_address
+ + k + page_size;
+ mem_region_hpa[regionidx_hpa].memory_size = k + page_size;
+ LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest phys addr
end "
+ "[%d]:(%p)\n", regionidx_hpa,
+ (void *)(uintptr_t)
+ (mem_region_hpa[regionidx_hpa].guest_phys_address_end));
+ LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest phys addr
size "
+ "[%d]:(%p)\n", regionidx_hpa,
+ (void *)(uintptr_t)
+ (mem_region_hpa[regionidx_hpa].memory_size));
+ ++regionidx_hpa;
+ }
+ return regionidx_hpa;
}
/*
@@ -3293,6 +2553,52 @@ new_device (struct virtio_net *dev)
struct virtio_net_data_ll *ll_dev;
int lcore, core_add = 0;
uint32_t device_num_min = num_devices;
+ struct vhost_dev *vdev;
+ uint32_t regionidx;
+
+ vdev = rte_zmalloc("vhost device", sizeof(*vdev), CACHE_LINE_SIZE);
+ if (vdev == NULL) {
+ RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Couldn't allocate memory
for vhost dev\n",
+ dev->device_fh);
+ return -1;
+ }
+ vdev->dev = dev;
+ dev->priv = vdev;
+
+ if (zero_copy) {
+ vdev->nregions_hpa = dev->mem->nregions;
+ for (regionidx = 0; regionidx < dev->mem->nregions;
regionidx++) {
+ vdev->nregions_hpa
+ += check_hpa_regions(
+
dev->mem->regions[regionidx].guest_phys_address
+ +
dev->mem->regions[regionidx].address_offset,
+
dev->mem->regions[regionidx].memory_size);
+
+ }
+
+ vdev->regions_hpa = (struct virtio_memory_regions_hpa *)
rte_zmalloc("vhost hpa region",
+ sizeof(struct virtio_memory_regions_hpa) *
vdev->nregions_hpa,
+ CACHE_LINE_SIZE);
+ if (vdev->regions_hpa == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Cannot allocate memory for
hpa region\n");
+ rte_free(vdev);
+ return -1;
+ }
+
+
+ if (fill_hpa_memory_regions(
+ vdev->regions_hpa, dev->mem
+ ) != vdev->nregions_hpa) {
+
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "hpa memory regions number mismatch: "
+ "[%d]\n", vdev->nregions_hpa);
+ rte_free(vdev->regions_hpa);
+ rte_free(vdev);
+ return -1;
+ }
+ }
+
/* Add device to main ll */
ll_dev = get_data_ll_free_entry(&ll_root_free);
@@ -3300,15 +2606,18 @@ new_device (struct virtio_net *dev)
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") No free entry found in
linked list. Device limit "
"of %d devices per core has been reached\n",
dev->device_fh, num_devices);
+ if (vdev->regions_hpa)
+ rte_free(vdev->regions_hpa);
+ rte_free(vdev);
return -1;
}
- ll_dev->dev = dev;
+ ll_dev->vdev = vdev;
add_data_ll_entry(&ll_root_used, ll_dev);
- ll_dev->dev->vmdq_rx_q
- = ll_dev->dev->device_fh * (num_queues / num_devices);
+ vdev->vmdq_rx_q
+ = dev->device_fh * (num_queues / num_devices);
if (zero_copy) {
- uint32_t index = ll_dev->dev->vmdq_rx_q;
+ uint32_t index = vdev->vmdq_rx_q;
uint32_t count_in_ring, i;
struct mbuf_table *tx_q;
@@ -3339,47 +2648,51 @@ new_device (struct virtio_net *dev)
dev->device_fh,
rte_ring_count(vpool_array[index].ring));
- tx_q = &tx_queue_zcp[(uint16_t)dev->vmdq_rx_q];
- tx_q->txq_id = dev->vmdq_rx_q;
+ tx_q = &tx_queue_zcp[(uint16_t)vdev->vmdq_rx_q];
+ tx_q->txq_id = vdev->vmdq_rx_q;
- if (rte_eth_dev_tx_queue_start(ports[0], dev->vmdq_rx_q) != 0) {
- struct vpool *vpool = &vpool_array[dev->vmdq_rx_q];
+ if (rte_eth_dev_tx_queue_start(ports[0], vdev->vmdq_rx_q) != 0)
{
+ struct vpool *vpool = &vpool_array[vdev->vmdq_rx_q];
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") In new_device: Failed to start "
"tx queue:%d\n",
- dev->device_fh, dev->vmdq_rx_q);
+ dev->device_fh, vdev->vmdq_rx_q);
mbuf_destroy_zcp(vpool);
+ rte_free(vdev->regions_hpa);
+ rte_free(vdev);
return -1;
}
- if (rte_eth_dev_rx_queue_start(ports[0], dev->vmdq_rx_q) != 0) {
- struct vpool *vpool = &vpool_array[dev->vmdq_rx_q];
+ if (rte_eth_dev_rx_queue_start(ports[0], vdev->vmdq_rx_q) != 0)
{
+ struct vpool *vpool = &vpool_array[vdev->vmdq_rx_q];
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") In new_device: Failed to start "
"rx queue:%d\n",
- dev->device_fh, dev->vmdq_rx_q);
+ dev->device_fh, vdev->vmdq_rx_q);
/* Stop the TX queue. */
if (rte_eth_dev_tx_queue_stop(ports[0],
- dev->vmdq_rx_q) != 0) {
+ vdev->vmdq_rx_q) != 0) {
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") In new_device: Failed to "
"stop tx queue:%d\n",
- dev->device_fh, dev->vmdq_rx_q);
+ dev->device_fh, vmdq_rx_q);
}
mbuf_destroy_zcp(vpool);
+ rte_free(vdev->regions_hpa);
+ rte_free(vdev);
return -1;
}
}
/*reset ready flag*/
- dev->ready = DEVICE_MAC_LEARNING;
- dev->remove = 0;
+ vdev->ready = DEVICE_MAC_LEARNING;
+ vdev->remove = 0;
/* Find a suitable lcore to add the device. */
RTE_LCORE_FOREACH_SLAVE(lcore) {
@@ -3389,26 +2702,33 @@ new_device (struct virtio_net *dev)
}
}
/* Add device to lcore ll */
- ll_dev->dev->coreid = core_add;
- ll_dev =
get_data_ll_free_entry(&lcore_info[ll_dev->dev->coreid].lcore_ll->ll_root_free);
+ ll_dev =
get_data_ll_free_entry(&lcore_info[core_add].lcore_ll->ll_root_free);
if (ll_dev == NULL) {
RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Failed to add device to
data core\n", dev->device_fh);
- dev->ready = DEVICE_SAFE_REMOVE;
+ vdev->ready = DEVICE_SAFE_REMOVE;
destroy_device(dev);
+ if (vdev->regions_hpa)
+ rte_free(vdev->regions_hpa);
+ rte_free(vdev);
return -1;
}
- ll_dev->dev = dev;
-
add_data_ll_entry(&lcore_info[ll_dev->dev->coreid].lcore_ll->ll_root_used,
ll_dev);
+ ll_dev->vdev = vdev;
+ vdev->coreid = core_add;
+
+
+
+ add_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
ll_dev);
/* Initialize device stats */
memset(&dev_statistics[dev->device_fh], 0, sizeof(struct
device_statistics));
/* Disable notifications. */
- set_irq_status(dev);
- lcore_info[ll_dev->dev->coreid].lcore_ll->device_num++;
+ rte_vhost_enable_guest_notification(dev, VIRTIO_RXQ, 0);
+ rte_vhost_enable_guest_notification(dev, VIRTIO_TXQ, 0);
+ lcore_info[vdev->coreid].lcore_ll->device_num++;
dev->flags |= VIRTIO_DEV_RUNNING;
- RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been added to data
core %d\n", dev->device_fh, dev->coreid);
+ RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been added to data
core %d\n", dev->device_fh, vdev->coreid);
return 0;
}
@@ -3447,7 +2767,7 @@ print_stats(void)
dev_ll = ll_root_used;
while (dev_ll != NULL) {
- device_fh = (uint32_t)dev_ll->dev->device_fh;
+ device_fh = (uint32_t)dev_ll->vdev->dev->device_fh;
tx_total = dev_statistics[device_fh].tx_total;
tx = dev_statistics[device_fh].tx;
tx_dropped = tx_total - tx;
@@ -3707,15 +3027,18 @@ MAIN(int argc, char *argv[])
lcore_id);
}
+ if (mergeable == 0)
+ rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_MRG_RXBUF);
+
/* Register CUSE device to handle IOCTLs. */
- ret = register_cuse_device((char*)&dev_basename, dev_index,
get_virtio_net_callbacks());
+ ret = rte_vhost_driver_register((char *)&dev_basename);
if (ret != 0)
rte_exit(EXIT_FAILURE,"CUSE device setup failure.\n");
- init_virtio_net(&virtio_net_device_ops);
+ rte_vhost_driver_callback_register(&virtio_net_device_ops);
/* Start CUSE session. */
- start_cuse_session_loop();
+ rte_vhost_driver_session_start();
return 0;
}
diff --git a/examples/vhost/main.h b/examples/vhost/main.h
index c15d938..02e991d 100644
--- a/examples/vhost/main.h
+++ b/examples/vhost/main.h
@@ -57,13 +57,50 @@
#define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER2
#define RTE_LOGTYPE_VHOST_PORT RTE_LOGTYPE_USER3
-/*
+/**
+ * Information relating to memory regions including offsets to
+ * addresses in host physical space.
+ */
+struct virtio_memory_regions_hpa {
+ /**< Base guest physical address of region. */
+ uint64_t guest_phys_address;
+ /**< End guest physical address of region. */
+ uint64_t guest_phys_address_end;
+ /**< Size of region. */
+ uint64_t memory_size;
+ /**< Offset of region for gpa to hpa translation. */
+ uint64_t host_phys_addr_offset;
+};
+
+/**
* Device linked list structure for data path.
*/
-struct virtio_net_data_ll
-{
- struct virtio_net *dev; /* Pointer to device
created by configuration core. */
- struct virtio_net_data_ll *next; /* Pointer to next device in
linked list. */
+struct vhost_dev {
+ /**< Pointer to device created by vhost lib. */
+ struct virtio_net *dev;
+ /**< Number of memory regions for gpa to hpa translation. */
+ uint32_t nregions_hpa;
+ /**< Memory region information for gpa to hpa translation. */
+ struct virtio_memory_regions_hpa *regions_hpa;
+ /**< Device MAC address (Obtained on first TX packet). */
+ struct ether_addr mac_address;
+ /**< RX VMDQ queue number. */
+ uint16_t vmdq_rx_q;
+ /**< Vlan tag assigned to the pool */
+ uint32_t vlan_tag;
+ /**< Data core that the device is added to. */
+ uint16_t coreid;
+ /**< A device is set as ready if the MAC address has been set. */
+ volatile uint8_t ready;
+ /**< Device is marked for removal from the data core. */
+ volatile uint8_t remove;
+} __rte_cache_aligned;
+
+struct virtio_net_data_ll {
+ /* Pointer to device created by configuration core. */
+ struct vhost_dev *vdev;
+ /* Pointer to next device in linked list. */
+ struct virtio_net_data_ll *next;
};
/*
--
1.8.1.4
