-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2016 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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2017 Intel Corporation
*/
#include <linux/vhost.h>
#include <stdint.h>
#include <stdlib.h>
#ifdef RTE_LIBRTE_VHOST_NUMA
+#include <numa.h>
#include <numaif.h>
#endif
+#include <rte_errno.h>
#include <rte_ethdev.h>
#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_memory.h>
#include <rte_malloc.h>
-#include <rte_virtio_net.h>
+#include <rte_vhost.h>
+#include <rte_rwlock.h>
+#include "iotlb.h"
#include "vhost.h"
+#include "vhost_user.h"
struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
-struct virtio_net *
-get_device(int vid)
+/* Called with iotlb_lock read-locked */
+uint64_t
+__vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
+ uint64_t iova, uint64_t *size, uint8_t perm)
{
- struct virtio_net *dev = vhost_devices[vid];
+ uint64_t vva, tmp_size;
- if (unlikely(!dev)) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) device not found.\n", vid);
+ if (unlikely(!*size))
+ return 0;
+
+ tmp_size = *size;
+
+ vva = vhost_user_iotlb_cache_find(vq, iova, &tmp_size, perm);
+ if (tmp_size == *size)
+ return vva;
+
+ iova += tmp_size;
+
+ if (!vhost_user_iotlb_pending_miss(vq, iova, perm)) {
+ /*
+ * iotlb_lock is read-locked for a full burst,
+ * but it only protects the iotlb cache.
+ * In case of IOTLB miss, we might block on the socket,
+ * which could cause a deadlock with QEMU if an IOTLB update
+ * is being handled. We can safely unlock here to avoid it.
+ */
+ vhost_user_iotlb_rd_unlock(vq);
+
+ vhost_user_iotlb_pending_insert(vq, iova, perm);
+ if (vhost_user_iotlb_miss(dev, iova, perm)) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "IOTLB miss req failed for IOVA 0x%" PRIx64 "\n",
+ iova);
+ vhost_user_iotlb_pending_remove(vq, iova, 1, perm);
+ }
+
+ vhost_user_iotlb_rd_lock(vq);
}
- return dev;
+ return 0;
}
-static void
+#define VHOST_LOG_PAGE 4096
+
+/*
+ * Atomically set a bit in memory.
+ */
+static __rte_always_inline void
+vhost_set_bit(unsigned int nr, volatile uint8_t *addr)
+{
+#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION < 70100)
+ /*
+ * __sync_ built-ins are deprecated, but __atomic_ ones
+ * are sub-optimized in older GCC versions.
+ */
+ __sync_fetch_and_or_1(addr, (1U << nr));
+#else
+ __atomic_fetch_or(addr, (1U << nr), __ATOMIC_RELAXED);
+#endif
+}
+
+static __rte_always_inline void
+vhost_log_page(uint8_t *log_base, uint64_t page)
+{
+ vhost_set_bit(page % 8, &log_base[page / 8]);
+}
+
+void
+__vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len)
+{
+ uint64_t page;
+
+ if (unlikely(!dev->log_base || !len))
+ return;
+
+ if (unlikely(dev->log_size <= ((addr + len - 1) / VHOST_LOG_PAGE / 8)))
+ return;
+
+ /* To make sure guest memory updates are committed before logging */
+ rte_smp_wmb();
+
+ page = addr / VHOST_LOG_PAGE;
+ while (page * VHOST_LOG_PAGE < addr + len) {
+ vhost_log_page((uint8_t *)(uintptr_t)dev->log_base, page);
+ page += 1;
+ }
+}
+
+void
+__vhost_log_cache_sync(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+ unsigned long *log_base;
+ int i;
+
+ if (unlikely(!dev->log_base))
+ return;
+
+ rte_smp_wmb();
+
+ log_base = (unsigned long *)(uintptr_t)dev->log_base;
+
+ for (i = 0; i < vq->log_cache_nb_elem; i++) {
+ struct log_cache_entry *elem = vq->log_cache + i;
+
+#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION < 70100)
+ /*
+ * '__sync' builtins are deprecated, but '__atomic' ones
+ * are sub-optimized in older GCC versions.
+ */
+ __sync_fetch_and_or(log_base + elem->offset, elem->val);
+#else
+ __atomic_fetch_or(log_base + elem->offset, elem->val,
+ __ATOMIC_RELAXED);
+#endif
+ }
+
+ rte_smp_wmb();
+
+ vq->log_cache_nb_elem = 0;
+}
+
+static __rte_always_inline void
+vhost_log_cache_page(struct virtio_net *dev, struct vhost_virtqueue *vq,
+ uint64_t page)
+{
+ uint32_t bit_nr = page % (sizeof(unsigned long) << 3);
+ uint32_t offset = page / (sizeof(unsigned long) << 3);
+ int i;
+
+ for (i = 0; i < vq->log_cache_nb_elem; i++) {
+ struct log_cache_entry *elem = vq->log_cache + i;
+
+ if (elem->offset == offset) {
+ elem->val |= (1UL << bit_nr);
+ return;
+ }
+ }
+
+ if (unlikely(i >= VHOST_LOG_CACHE_NR)) {
+ /*
+ * No more room for a new log cache entry,
+ * so write the dirty log map directly.
+ */
+ rte_smp_wmb();
+ vhost_log_page((uint8_t *)(uintptr_t)dev->log_base, page);
+
+ return;
+ }
+
+ vq->log_cache[i].offset = offset;
+ vq->log_cache[i].val = (1UL << bit_nr);
+ vq->log_cache_nb_elem++;
+}
+
+void
+__vhost_log_cache_write(struct virtio_net *dev, struct vhost_virtqueue *vq,
+ uint64_t addr, uint64_t len)
+{
+ uint64_t page;
+
+ if (unlikely(!dev->log_base || !len))
+ return;
+
+ if (unlikely(dev->log_size <= ((addr + len - 1) / VHOST_LOG_PAGE / 8)))
+ return;
+
+ page = addr / VHOST_LOG_PAGE;
+ while (page * VHOST_LOG_PAGE < addr + len) {
+ vhost_log_cache_page(dev, vq, page);
+ page += 1;
+ }
+}
+
+void *
+vhost_alloc_copy_ind_table(struct virtio_net *dev, struct vhost_virtqueue *vq,
+ uint64_t desc_addr, uint64_t desc_len)
+{
+ void *idesc;
+ uint64_t src, dst;
+ uint64_t len, remain = desc_len;
+
+ idesc = rte_malloc(__func__, desc_len, 0);
+ if (unlikely(!idesc))
+ return NULL;
+
+ dst = (uint64_t)(uintptr_t)idesc;
+
+ while (remain) {
+ len = remain;
+ src = vhost_iova_to_vva(dev, vq, desc_addr, &len,
+ VHOST_ACCESS_RO);
+ if (unlikely(!src || !len)) {
+ rte_free(idesc);
+ return NULL;
+ }
+
+ rte_memcpy((void *)(uintptr_t)dst, (void *)(uintptr_t)src, len);
+
+ remain -= len;
+ dst += len;
+ desc_addr += len;
+ }
+
+ return idesc;
+}
+
+void
cleanup_vq(struct vhost_virtqueue *vq, int destroy)
{
if ((vq->callfd >= 0) && (destroy != 0))
vhost_backend_cleanup(dev);
- for (i = 0; i < dev->virt_qp_nb; i++) {
- cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ], destroy);
- cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ], destroy);
- }
+ for (i = 0; i < dev->nr_vring; i++)
+ cleanup_vq(dev->virtqueue[i], destroy);
+}
+
+void
+free_vq(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+ if (vq_is_packed(dev))
+ rte_free(vq->shadow_used_packed);
+ else
+ rte_free(vq->shadow_used_split);
+ rte_free(vq->batch_copy_elems);
+ rte_mempool_free(vq->iotlb_pool);
+ rte_free(vq);
}
/*
free_device(struct virtio_net *dev)
{
uint32_t i;
- struct vhost_virtqueue *rxq, *txq;
- for (i = 0; i < dev->virt_qp_nb; i++) {
- rxq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ];
- txq = dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ];
+ for (i = 0; i < dev->nr_vring; i++)
+ free_vq(dev, dev->virtqueue[i]);
+
+ rte_free(dev);
+}
+
+static int
+vring_translate_split(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+ uint64_t req_size, size;
+
+ req_size = sizeof(struct vring_desc) * vq->size;
+ size = req_size;
+ vq->desc = (struct vring_desc *)(uintptr_t)vhost_iova_to_vva(dev, vq,
+ vq->ring_addrs.desc_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->desc || size != req_size)
+ return -1;
+
+ req_size = sizeof(struct vring_avail);
+ req_size += sizeof(uint16_t) * vq->size;
+ if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
+ req_size += sizeof(uint16_t);
+ size = req_size;
+ vq->avail = (struct vring_avail *)(uintptr_t)vhost_iova_to_vva(dev, vq,
+ vq->ring_addrs.avail_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->avail || size != req_size)
+ return -1;
+
+ req_size = sizeof(struct vring_used);
+ req_size += sizeof(struct vring_used_elem) * vq->size;
+ if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
+ req_size += sizeof(uint16_t);
+ size = req_size;
+ vq->used = (struct vring_used *)(uintptr_t)vhost_iova_to_vva(dev, vq,
+ vq->ring_addrs.used_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->used || size != req_size)
+ return -1;
+
+ return 0;
+}
+
+static int
+vring_translate_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+ uint64_t req_size, size;
+
+ req_size = sizeof(struct vring_packed_desc) * vq->size;
+ size = req_size;
+ vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
+ vhost_iova_to_vva(dev, vq, vq->ring_addrs.desc_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->desc_packed || size != req_size)
+ return -1;
+
+ req_size = sizeof(struct vring_packed_desc_event);
+ size = req_size;
+ vq->driver_event = (struct vring_packed_desc_event *)(uintptr_t)
+ vhost_iova_to_vva(dev, vq, vq->ring_addrs.avail_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->driver_event || size != req_size)
+ return -1;
+
+ req_size = sizeof(struct vring_packed_desc_event);
+ size = req_size;
+ vq->device_event = (struct vring_packed_desc_event *)(uintptr_t)
+ vhost_iova_to_vva(dev, vq, vq->ring_addrs.used_user_addr,
+ &size, VHOST_ACCESS_RW);
+ if (!vq->device_event || size != req_size)
+ return -1;
+
+ return 0;
+}
+
+int
+vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
- rte_free(rxq->shadow_used_ring);
- rte_free(txq->shadow_used_ring);
+ if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
+ goto out;
- /* rxq and txq are allocated together as queue-pair */
- rte_free(rxq);
+ if (vq_is_packed(dev)) {
+ if (vring_translate_packed(dev, vq) < 0)
+ return -1;
+ } else {
+ if (vring_translate_split(dev, vq) < 0)
+ return -1;
}
+out:
+ vq->access_ok = 1;
- rte_free(dev);
+ return 0;
+}
+
+void
+vring_invalidate(struct virtio_net *dev, struct vhost_virtqueue *vq)
+{
+ if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
+ vhost_user_iotlb_wr_lock(vq);
+
+ vq->access_ok = 0;
+ vq->desc = NULL;
+ vq->avail = NULL;
+ vq->used = NULL;
+
+ if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
+ vhost_user_iotlb_wr_unlock(vq);
}
static void
-init_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
+init_vring_queue(struct virtio_net *dev, uint32_t vring_idx)
{
+ struct vhost_virtqueue *vq;
+
+ if (vring_idx >= VHOST_MAX_VRING) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed not init vring, out of bound (%d)\n",
+ vring_idx);
+ return;
+ }
+
+ vq = dev->virtqueue[vring_idx];
+
memset(vq, 0, sizeof(struct vhost_virtqueue));
vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
+ vhost_user_iotlb_init(dev, vring_idx);
/* Backends are set to -1 indicating an inactive device. */
vq->backend = -1;
- /* always set the default vq pair to enabled */
- if (qp_idx == 0)
- vq->enabled = 1;
-
TAILQ_INIT(&vq->zmbuf_list);
}
static void
-init_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
-{
- uint32_t base_idx = qp_idx * VIRTIO_QNUM;
-
- init_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
- init_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
-}
-
-static void
-reset_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
+reset_vring_queue(struct virtio_net *dev, uint32_t vring_idx)
{
+ struct vhost_virtqueue *vq;
int callfd;
+ if (vring_idx >= VHOST_MAX_VRING) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed not init vring, out of bound (%d)\n",
+ vring_idx);
+ return;
+ }
+
+ vq = dev->virtqueue[vring_idx];
callfd = vq->callfd;
- init_vring_queue(vq, qp_idx);
+ init_vring_queue(dev, vring_idx);
vq->callfd = callfd;
}
-static void
-reset_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
-{
- uint32_t base_idx = qp_idx * VIRTIO_QNUM;
-
- reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
- reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
-}
-
int
-alloc_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
+alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx)
{
- struct vhost_virtqueue *virtqueue = NULL;
- uint32_t virt_rx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_RXQ;
- uint32_t virt_tx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_TXQ;
+ struct vhost_virtqueue *vq;
- virtqueue = rte_malloc(NULL,
- sizeof(struct vhost_virtqueue) * VIRTIO_QNUM, 0);
- if (virtqueue == NULL) {
+ vq = rte_malloc(NULL, sizeof(struct vhost_virtqueue), 0);
+ if (vq == NULL) {
RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to allocate memory for virt qp:%d.\n", qp_idx);
+ "Failed to allocate memory for vring:%u.\n", vring_idx);
return -1;
}
- dev->virtqueue[virt_rx_q_idx] = virtqueue;
- dev->virtqueue[virt_tx_q_idx] = virtqueue + VIRTIO_TXQ;
-
- init_vring_queue_pair(dev, qp_idx);
+ dev->virtqueue[vring_idx] = vq;
+ init_vring_queue(dev, vring_idx);
+ rte_spinlock_init(&vq->access_lock);
+ vq->avail_wrap_counter = 1;
+ vq->used_wrap_counter = 1;
+ vq->signalled_used_valid = false;
- dev->virt_qp_nb += 1;
+ dev->nr_vring += 1;
return 0;
}
/*
* Reset some variables in device structure, while keeping few
- * others untouched, such as vid, ifname, virt_qp_nb: they
+ * others untouched, such as vid, ifname, nr_vring: they
* should be same unless the device is removed.
*/
void
dev->features = 0;
dev->protocol_features = 0;
- dev->flags = 0;
+ dev->flags &= VIRTIO_DEV_BUILTIN_VIRTIO_NET;
- for (i = 0; i < dev->virt_qp_nb; i++)
- reset_vring_queue_pair(dev, i);
+ for (i = 0; i < dev->nr_vring; i++)
+ reset_vring_queue(dev, i);
}
/*
struct virtio_net *dev;
int i;
- dev = rte_zmalloc(NULL, sizeof(struct virtio_net), 0);
- if (dev == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to allocate memory for new dev.\n");
- return -1;
- }
-
for (i = 0; i < MAX_VHOST_DEVICE; i++) {
if (vhost_devices[i] == NULL)
break;
}
+
if (i == MAX_VHOST_DEVICE) {
RTE_LOG(ERR, VHOST_CONFIG,
"Failed to find a free slot for new device.\n");
- rte_free(dev);
+ return -1;
+ }
+
+ dev = rte_zmalloc(NULL, sizeof(struct virtio_net), 0);
+ if (dev == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to allocate memory for new dev.\n");
return -1;
}
vhost_devices[i] = dev;
dev->vid = i;
+ dev->flags = VIRTIO_DEV_BUILTIN_VIRTIO_NET;
+ dev->slave_req_fd = -1;
+ dev->vdpa_dev_id = -1;
+ dev->postcopy_ufd = -1;
+ rte_spinlock_init(&dev->slave_req_lock);
return i;
}
+void
+vhost_destroy_device_notify(struct virtio_net *dev)
+{
+ struct rte_vdpa_device *vdpa_dev;
+ int did;
+
+ if (dev->flags & VIRTIO_DEV_RUNNING) {
+ did = dev->vdpa_dev_id;
+ vdpa_dev = rte_vdpa_get_device(did);
+ if (vdpa_dev && vdpa_dev->ops->dev_close)
+ vdpa_dev->ops->dev_close(dev->vid);
+ dev->flags &= ~VIRTIO_DEV_RUNNING;
+ dev->notify_ops->destroy_device(dev->vid);
+ }
+}
+
/*
* Invoked when there is the vhost-user connection is broken (when
* the virtio device is being detached).
if (dev == NULL)
return;
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- dev->notify_ops->destroy_device(vid);
- }
+ vhost_destroy_device_notify(dev);
cleanup_device(dev, 1);
free_device(dev);
vhost_devices[vid] = NULL;
}
+void
+vhost_attach_vdpa_device(int vid, int did)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return;
+
+ if (rte_vdpa_get_device(did) == NULL)
+ return;
+
+ dev->vdpa_dev_id = did;
+}
+
void
vhost_set_ifname(int vid, const char *if_name, unsigned int if_len)
{
dev->dequeue_zero_copy = 1;
}
+void
+vhost_set_builtin_virtio_net(int vid, bool enable)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return;
+
+ if (enable)
+ dev->flags |= VIRTIO_DEV_BUILTIN_VIRTIO_NET;
+ else
+ dev->flags &= ~VIRTIO_DEV_BUILTIN_VIRTIO_NET;
+}
+
int
rte_vhost_get_mtu(int vid, uint16_t *mtu)
{
struct virtio_net *dev = get_device(vid);
- if (!dev)
+ if (dev == NULL || mtu == NULL)
return -ENODEV;
if (!(dev->flags & VIRTIO_DEV_READY))
return -EAGAIN;
- if (!(dev->features & VIRTIO_NET_F_MTU))
+ if (!(dev->features & (1ULL << VIRTIO_NET_F_MTU)))
return -ENOTSUP;
*mtu = dev->mtu;
int numa_node;
int ret;
- if (dev == NULL)
+ if (dev == NULL || numa_available() != 0)
return -1;
ret = get_mempolicy(&numa_node, NULL, 0, dev,
MPOL_F_NODE | MPOL_F_ADDR);
if (ret < 0) {
RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to query numa node: %d\n", vid, ret);
+ "(%d) failed to query numa node: %s\n",
+ vid, rte_strerror(errno));
return -1;
}
if (dev == NULL)
return 0;
- return dev->virt_qp_nb;
+ return dev->nr_vring / 2;
+}
+
+uint16_t
+rte_vhost_get_vring_num(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return 0;
+
+ return dev->nr_vring;
}
int
{
struct virtio_net *dev = get_device(vid);
- if (dev == NULL)
+ if (dev == NULL || buf == NULL)
return -1;
len = RTE_MIN(len, sizeof(dev->ifname));
struct virtio_net *dev;
dev = get_device(vid);
- if (!dev)
+ if (dev == NULL || features == NULL)
return -1;
*features = dev->features;
size_t size;
dev = get_device(vid);
- if (!dev)
+ if (dev == NULL || mem == NULL)
return -1;
size = dev->mem->nregions * sizeof(struct rte_vhost_mem_region);
- m = malloc(size);
+ m = malloc(sizeof(struct rte_vhost_memory) + size);
if (!m)
return -1;
struct vhost_virtqueue *vq;
dev = get_device(vid);
- if (!dev)
+ if (dev == NULL || vring == NULL)
return -1;
if (vring_idx >= VHOST_MAX_VRING)
return 0;
}
+int
+rte_vhost_vring_call(int vid, uint16_t vring_idx)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (!dev)
+ return -1;
+
+ if (vring_idx >= VHOST_MAX_VRING)
+ return -1;
+
+ vq = dev->virtqueue[vring_idx];
+ if (!vq)
+ return -1;
+
+ if (vq_is_packed(dev))
+ vhost_vring_call_packed(dev, vq);
+ else
+ vhost_vring_call_split(dev, vq);
+
+ return 0;
+}
+
uint16_t
rte_vhost_avail_entries(int vid, uint16_t queue_id)
{
return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx;
}
+static inline void
+vhost_enable_notify_split(struct virtio_net *dev,
+ struct vhost_virtqueue *vq, int enable)
+{
+ if (!(dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))) {
+ if (enable)
+ vq->used->flags &= ~VRING_USED_F_NO_NOTIFY;
+ else
+ vq->used->flags |= VRING_USED_F_NO_NOTIFY;
+ } else {
+ if (enable)
+ vhost_avail_event(vq) = vq->last_avail_idx;
+ }
+}
+
+static inline void
+vhost_enable_notify_packed(struct virtio_net *dev,
+ struct vhost_virtqueue *vq, int enable)
+{
+ uint16_t flags;
+
+ if (!enable) {
+ vq->device_event->flags = VRING_EVENT_F_DISABLE;
+ return;
+ }
+
+ flags = VRING_EVENT_F_ENABLE;
+ if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) {
+ flags = VRING_EVENT_F_DESC;
+ vq->device_event->off_wrap = vq->last_avail_idx |
+ vq->avail_wrap_counter << 15;
+ }
+
+ rte_smp_wmb();
+
+ vq->device_event->flags = flags;
+}
+
int
rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
+{
+ struct virtio_net *dev = get_device(vid);
+ struct vhost_virtqueue *vq;
+
+ if (!dev)
+ return -1;
+
+ vq = dev->virtqueue[queue_id];
+
+ if (vq_is_packed(dev))
+ vhost_enable_notify_packed(dev, vq, enable);
+ else
+ vhost_enable_notify_split(dev, vq, enable);
+
+ return 0;
+}
+
+void
+rte_vhost_log_write(int vid, uint64_t addr, uint64_t len)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return;
+
+ vhost_log_write(dev, addr, len);
+}
+
+void
+rte_vhost_log_used_vring(int vid, uint16_t vring_idx,
+ uint64_t offset, uint64_t len)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (dev == NULL)
+ return;
+
+ if (vring_idx >= VHOST_MAX_VRING)
+ return;
+ vq = dev->virtqueue[vring_idx];
+ if (!vq)
+ return;
+
+ vhost_log_used_vring(dev, vq, offset, len);
+}
+
+uint32_t
+rte_vhost_rx_queue_count(int vid, uint16_t qid)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (dev == NULL)
+ return 0;
+
+ if (unlikely(qid >= dev->nr_vring || (qid & 1) == 0)) {
+ RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx %d.\n",
+ dev->vid, __func__, qid);
+ return 0;
+ }
+
+ vq = dev->virtqueue[qid];
+ if (vq == NULL)
+ return 0;
+
+ if (unlikely(vq->enabled == 0 || vq->avail == NULL))
+ return 0;
+
+ return *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx;
+}
+
+int rte_vhost_get_vdpa_device_id(int vid)
{
struct virtio_net *dev = get_device(vid);
if (dev == NULL)
return -1;
- if (enable) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "guest notification isn't supported.\n");
+ return dev->vdpa_dev_id;
+}
+
+int rte_vhost_get_log_base(int vid, uint64_t *log_base,
+ uint64_t *log_size)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL || log_base == NULL || log_size == NULL)
+ return -1;
+
+ *log_base = dev->log_base;
+ *log_size = dev->log_size;
+
+ return 0;
+}
+
+int rte_vhost_get_vring_base(int vid, uint16_t queue_id,
+ uint16_t *last_avail_idx, uint16_t *last_used_idx)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL)
+ return -1;
+
+ *last_avail_idx = dev->virtqueue[queue_id]->last_avail_idx;
+ *last_used_idx = dev->virtqueue[queue_id]->last_used_idx;
+
+ return 0;
+}
+
+int rte_vhost_set_vring_base(int vid, uint16_t queue_id,
+ uint16_t last_avail_idx, uint16_t last_used_idx)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (!dev)
+ return -1;
+
+ dev->virtqueue[queue_id]->last_avail_idx = last_avail_idx;
+ dev->virtqueue[queue_id]->last_used_idx = last_used_idx;
+
+ return 0;
+}
+
+int rte_vhost_extern_callback_register(int vid,
+ struct rte_vhost_user_extern_ops const * const ops, void *ctx)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL || ops == NULL)
return -1;
- }
- dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
+ dev->extern_ops = *ops;
+ dev->extern_data = ctx;
return 0;
}
git.droids-corp.org / dpdk.git / blobdiff