X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_vhost%2Fvhost.c;h=14b3e253e8377c6680cee480425d0a955fba2fde;hb=41d201804c4c44738168e2d247d3b1780845faa1;hp=e4150934bebd833ecbc3390a85635c1e1b6467fb;hpb=5731d6acc7fe1f76ed895d08821b51dd5c817bd0;p=dpdk.git diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index e4150934be..14b3e253e8 100644 --- a/lib/librte_vhost/vhost.c +++ b/lib/librte_vhost/vhost.c @@ -1,34 +1,5 @@ -/*- - * 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 @@ -37,58 +8,272 @@ #include #include #ifdef RTE_LIBRTE_VHOST_NUMA +#include #include #endif +#include #include #include #include #include #include -#include +#include +#include +#include "iotlb.h" #include "vhost.h" - -#define VHOST_USER_F_PROTOCOL_FEATURES 30 - -/* Features supported by this lib. */ -#define VHOST_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \ - (1ULL << VIRTIO_NET_F_CTRL_VQ) | \ - (1ULL << VIRTIO_NET_F_CTRL_RX) | \ - (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \ - (VHOST_SUPPORTS_MQ) | \ - (1ULL << VIRTIO_F_VERSION_1) | \ - (1ULL << VHOST_F_LOG_ALL) | \ - (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \ - (1ULL << VIRTIO_NET_F_HOST_TSO4) | \ - (1ULL << VIRTIO_NET_F_HOST_TSO6) | \ - (1ULL << VIRTIO_NET_F_CSUM) | \ - (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \ - (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \ - (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \ - (1ULL << VIRTIO_RING_F_INDIRECT_DESC)) - -uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES; +#include "vhost_user.h" struct virtio_net *vhost_devices[MAX_VHOST_DEVICE]; -/* device ops to add/remove device to/from data core. */ -struct virtio_net_device_ops const *notify_ops; +/* 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) +{ + uint64_t vva, tmp_size; + + 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)) { + VHOST_LOG_CONFIG(ERR, + "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 0; +} + +#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(); -struct virtio_net * -get_device(int vid) + 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_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, + uint64_t iova, uint64_t len) +{ + uint64_t hva, gpa, map_len; + map_len = len; + + hva = __vhost_iova_to_vva(dev, vq, iova, &map_len, VHOST_ACCESS_RW); + if (map_len != len) { + VHOST_LOG_DATA(ERR, + "Failed to write log for IOVA 0x%" PRIx64 ". No IOTLB entry found\n", + iova); + return; + } + + gpa = hva_to_gpa(dev, hva, len); + if (gpa) + __vhost_log_write(dev, gpa, len); +} + +void +__vhost_log_cache_sync(struct virtio_net *dev, struct vhost_virtqueue *vq) { - struct virtio_net *dev = vhost_devices[vid]; + unsigned long *log_base; + int i; + + if (unlikely(!dev->log_base)) + return; + + rte_smp_wmb(); + + log_base = (unsigned long *)(uintptr_t)dev->log_base; - if (unlikely(!dev)) { - RTE_LOG(ERR, VHOST_CONFIG, - "(%d) device not found.\n", vid); + 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 } - return dev; + rte_smp_wmb(); + + vq->log_cache_nb_elem = 0; } -static void +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_log_cache_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, + uint64_t iova, uint64_t len) +{ + uint64_t hva, gpa, map_len; + map_len = len; + + hva = __vhost_iova_to_vva(dev, vq, iova, &map_len, VHOST_ACCESS_RW); + if (map_len != len) { + VHOST_LOG_DATA(ERR, + "Failed to write log for IOVA 0x%" PRIx64 ". No IOTLB entry found\n", + iova); + return; + } + + gpa = hva_to_gpa(dev, hva, len); + if (gpa) + __vhost_log_cache_write(dev, vq, gpa, len); +} + +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)) @@ -97,6 +282,31 @@ cleanup_vq(struct vhost_virtqueue *vq, int destroy) close(vq->kickfd); } +void +cleanup_vq_inflight(struct virtio_net *dev, struct vhost_virtqueue *vq) +{ + if (!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))) + return; + + if (vq_is_packed(dev)) { + if (vq->inflight_packed) + vq->inflight_packed = NULL; + } else { + if (vq->inflight_split) + vq->inflight_split = NULL; + } + + if (vq->resubmit_inflight) { + if (vq->resubmit_inflight->resubmit_list) { + free(vq->resubmit_inflight->resubmit_list); + vq->resubmit_inflight->resubmit_list = NULL; + } + free(vq->resubmit_inflight); + vq->resubmit_inflight = NULL; + } +} + /* * Unmap any memory, close any file descriptors and * free any memory owned by a device. @@ -108,10 +318,27 @@ cleanup_device(struct virtio_net *dev, int destroy) 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); + cleanup_vq_inflight(dev, dev->virtqueue[i]); + } +} + +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); + if (vq->async_pkts_pending) + rte_free(vq->async_pkts_pending); + if (vq->async_pending_info) + rte_free(vq->async_pending_info); } + rte_free(vq->batch_copy_elems); + rte_mempool_free(vq->iotlb_pool); + rte_free(vq); } /* @@ -121,96 +348,246 @@ static void 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 __rte_always_inline int +log_translate(struct virtio_net *dev, struct vhost_virtqueue *vq) +{ + if (likely(!(vq->ring_addrs.flags & (1 << VHOST_VRING_F_LOG)))) + return 0; + + vq->log_guest_addr = translate_log_addr(dev, vq, + vq->ring_addrs.log_guest_addr); + if (vq->log_guest_addr == 0) + return -1; + + return 0; +} + +/* + * Converts vring log address to GPA + * If IOMMU is enabled, the log address is IOVA + * If IOMMU not enabled, the log address is already GPA + * + * Caller should have iotlb_lock read-locked + */ +uint64_t +translate_log_addr(struct virtio_net *dev, struct vhost_virtqueue *vq, + uint64_t log_addr) +{ + if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) { + const uint64_t exp_size = sizeof(uint64_t); + uint64_t hva, gpa; + uint64_t size = exp_size; + + hva = vhost_iova_to_vva(dev, vq, log_addr, + &size, VHOST_ACCESS_RW); + + if (size != exp_size) + return 0; + + gpa = hva_to_gpa(dev, hva, exp_size); + if (!gpa) { + VHOST_LOG_CONFIG(ERR, + "VQ: Failed to find GPA for log_addr: 0x%" + PRIx64 " hva: 0x%" PRIx64 "\n", + log_addr, hva); + return 0; + } + return gpa; + + } else + return log_addr; +} + +/* Caller should have iotlb_lock read-locked */ +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; +} + +/* Caller should have iotlb_lock read-locked */ +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))) + return -1; - /* 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; } - rte_free(dev); + if (log_translate(dev, vq) < 0) + return -1; + + vq->access_ok = 1; + + 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; + vq->log_guest_addr = 0; + + 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) { + VHOST_LOG_CONFIG(ERR, + "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) { + VHOST_LOG_CONFIG(ERR, + "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) { - RTE_LOG(ERR, VHOST_CONFIG, - "Failed to allocate memory for virt qp:%d.\n", qp_idx); + vq = rte_malloc(NULL, sizeof(struct vhost_virtqueue), 0); + if (vq == NULL) { + VHOST_LOG_CONFIG(ERR, + "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; + 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; - init_vring_queue_pair(dev, qp_idx); - - 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 @@ -220,10 +597,10 @@ reset_device(struct virtio_net *dev) 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); } /* @@ -236,30 +613,48 @@ vhost_new_device(void) 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, + VHOST_LOG_CONFIG(ERR, "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) { + VHOST_LOG_CONFIG(ERR, + "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->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; + + if (dev->flags & VIRTIO_DEV_RUNNING) { + vdpa_dev = dev->vdpa_dev; + if (vdpa_dev) + 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). @@ -272,10 +667,7 @@ vhost_destroy_device(int vid) if (dev == NULL) return; - if (dev->flags & VIRTIO_DEV_RUNNING) { - dev->flags &= ~VIRTIO_DEV_RUNNING; - notify_ops->destroy_device(vid); - } + vhost_destroy_device_notify(dev); cleanup_device(dev, 1); free_device(dev); @@ -283,6 +675,17 @@ vhost_destroy_device(int vid) vhost_devices[vid] = NULL; } +void +vhost_attach_vdpa_device(int vid, struct rte_vdpa_device *vdpa_dev) +{ + struct virtio_net *dev = get_device(vid); + + if (dev == NULL) + return; + + dev->vdpa_dev = vdpa_dev; +} + void vhost_set_ifname(int vid, const char *if_name, unsigned int if_len) { @@ -309,6 +712,62 @@ vhost_enable_dequeue_zero_copy(int vid) return; dev->dequeue_zero_copy = 1; + VHOST_LOG_CONFIG(INFO, "dequeue zero copy is enabled\n"); +} + +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; +} + +void +vhost_enable_extbuf(int vid) +{ + struct virtio_net *dev = get_device(vid); + + if (dev == NULL) + return; + + dev->extbuf = 1; +} + +void +vhost_enable_linearbuf(int vid) +{ + struct virtio_net *dev = get_device(vid); + + if (dev == NULL) + return; + + dev->linearbuf = 1; +} + +int +rte_vhost_get_mtu(int vid, uint16_t *mtu) +{ + struct virtio_net *dev = get_device(vid); + + if (dev == NULL || mtu == NULL) + return -ENODEV; + + if (!(dev->flags & VIRTIO_DEV_READY)) + return -EAGAIN; + + if (!(dev->features & (1ULL << VIRTIO_NET_F_MTU))) + return -ENOTSUP; + + *mtu = dev->mtu; + + return 0; } int @@ -319,14 +778,15 @@ rte_vhost_get_numa_node(int vid) 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); + VHOST_LOG_CONFIG(ERR, + "(%d) failed to query numa node: %s\n", + vid, rte_strerror(errno)); return -1; } @@ -345,18 +805,29 @@ rte_vhost_get_queue_num(int vid) if (dev == NULL) return 0; - return dev->virt_qp_nb; + return dev->nr_vring / 2; } -int -rte_vhost_get_ifname(int vid, char *buf, size_t len) +uint16_t +rte_vhost_get_vring_num(int vid) { struct virtio_net *dev = get_device(vid); if (dev == NULL) - return -1; + return 0; - len = RTE_MIN(len, sizeof(dev->ifname)); + return dev->nr_vring; +} + +int +rte_vhost_get_ifname(int vid, char *buf, size_t len) +{ + struct virtio_net *dev = get_device(vid); + + if (dev == NULL || buf == NULL) + return -1; + + len = RTE_MIN(len, sizeof(dev->ifname)); strncpy(buf, dev->ifname, len); buf[len - 1] = '\0'; @@ -364,68 +835,804 @@ rte_vhost_get_ifname(int vid, char *buf, size_t len) return 0; } +int +rte_vhost_get_negotiated_features(int vid, uint64_t *features) +{ + struct virtio_net *dev; + + dev = get_device(vid); + if (dev == NULL || features == NULL) + return -1; + + *features = dev->features; + return 0; +} + +int +rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem) +{ + struct virtio_net *dev; + struct rte_vhost_memory *m; + size_t size; + + dev = get_device(vid); + if (dev == NULL || mem == NULL) + return -1; + + size = dev->mem->nregions * sizeof(struct rte_vhost_mem_region); + m = malloc(sizeof(struct rte_vhost_memory) + size); + if (!m) + return -1; + + m->nregions = dev->mem->nregions; + memcpy(m->regions, dev->mem->regions, size); + *mem = m; + + return 0; +} + +int +rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx, + struct rte_vhost_vring *vring) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (dev == NULL || vring == NULL) + return -1; + + if (vring_idx >= VHOST_MAX_VRING) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (!vq) + return -1; + + if (vq_is_packed(dev)) { + vring->desc_packed = vq->desc_packed; + vring->driver_event = vq->driver_event; + vring->device_event = vq->device_event; + } else { + vring->desc = vq->desc; + vring->avail = vq->avail; + vring->used = vq->used; + } + vring->log_guest_addr = vq->log_guest_addr; + + vring->callfd = vq->callfd; + vring->kickfd = vq->kickfd; + vring->size = vq->size; + + return 0; +} + +int +rte_vhost_get_vhost_ring_inflight(int vid, uint16_t vring_idx, + struct rte_vhost_ring_inflight *vring) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (vring_idx >= VHOST_MAX_VRING) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (vq_is_packed(dev)) { + if (unlikely(!vq->inflight_packed)) + return -1; + + vring->inflight_packed = vq->inflight_packed; + } else { + if (unlikely(!vq->inflight_split)) + return -1; + + vring->inflight_split = vq->inflight_split; + } + + vring->resubmit_inflight = vq->resubmit_inflight; + + return 0; +} + +int +rte_vhost_set_inflight_desc_split(int vid, uint16_t vring_idx, + uint16_t idx) +{ + struct vhost_virtqueue *vq; + struct virtio_net *dev; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (unlikely(!vq->inflight_split)) + return -1; + + if (unlikely(idx >= vq->size)) + return -1; + + vq->inflight_split->desc[idx].counter = vq->global_counter++; + vq->inflight_split->desc[idx].inflight = 1; + return 0; +} + +int +rte_vhost_set_inflight_desc_packed(int vid, uint16_t vring_idx, + uint16_t head, uint16_t last, + uint16_t *inflight_entry) +{ + struct rte_vhost_inflight_info_packed *inflight_info; + struct virtio_net *dev; + struct vhost_virtqueue *vq; + struct vring_packed_desc *desc; + uint16_t old_free_head, free_head; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(!vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + inflight_info = vq->inflight_packed; + if (unlikely(!inflight_info)) + return -1; + + if (unlikely(head >= vq->size)) + return -1; + + desc = vq->desc_packed; + old_free_head = inflight_info->old_free_head; + if (unlikely(old_free_head >= vq->size)) + return -1; + + free_head = old_free_head; + + /* init header descriptor */ + inflight_info->desc[old_free_head].num = 0; + inflight_info->desc[old_free_head].counter = vq->global_counter++; + inflight_info->desc[old_free_head].inflight = 1; + + /* save desc entry in flight entry */ + while (head != ((last + 1) % vq->size)) { + inflight_info->desc[old_free_head].num++; + inflight_info->desc[free_head].addr = desc[head].addr; + inflight_info->desc[free_head].len = desc[head].len; + inflight_info->desc[free_head].flags = desc[head].flags; + inflight_info->desc[free_head].id = desc[head].id; + + inflight_info->desc[old_free_head].last = free_head; + free_head = inflight_info->desc[free_head].next; + inflight_info->free_head = free_head; + head = (head + 1) % vq->size; + } + + inflight_info->old_free_head = free_head; + *inflight_entry = old_free_head; + + return 0; +} + +int +rte_vhost_clr_inflight_desc_split(int vid, uint16_t vring_idx, + uint16_t last_used_idx, uint16_t idx) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (unlikely(!vq->inflight_split)) + return -1; + + if (unlikely(idx >= vq->size)) + return -1; + + rte_smp_mb(); + + vq->inflight_split->desc[idx].inflight = 0; + + rte_smp_mb(); + + vq->inflight_split->used_idx = last_used_idx; + return 0; +} + +int +rte_vhost_clr_inflight_desc_packed(int vid, uint16_t vring_idx, + uint16_t head) +{ + struct rte_vhost_inflight_info_packed *inflight_info; + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(!vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + inflight_info = vq->inflight_packed; + if (unlikely(!inflight_info)) + return -1; + + if (unlikely(head >= vq->size)) + return -1; + + rte_smp_mb(); + + inflight_info->desc[head].inflight = 0; + + rte_smp_mb(); + + inflight_info->old_free_head = inflight_info->free_head; + inflight_info->old_used_idx = inflight_info->used_idx; + inflight_info->old_used_wrap_counter = inflight_info->used_wrap_counter; + + return 0; +} + +int +rte_vhost_set_last_inflight_io_split(int vid, uint16_t vring_idx, + uint16_t idx) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + if (unlikely(!vq->inflight_split)) + return -1; + + vq->inflight_split->last_inflight_io = idx; + return 0; +} + +int +rte_vhost_set_last_inflight_io_packed(int vid, uint16_t vring_idx, + uint16_t head) +{ + struct rte_vhost_inflight_info_packed *inflight_info; + struct virtio_net *dev; + struct vhost_virtqueue *vq; + uint16_t last; + + dev = get_device(vid); + if (unlikely(!dev)) + return -1; + + if (unlikely(!(dev->protocol_features & + (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))) + return 0; + + if (unlikely(!vq_is_packed(dev))) + return -1; + + if (unlikely(vring_idx >= VHOST_MAX_VRING)) + return -1; + + vq = dev->virtqueue[vring_idx]; + if (unlikely(!vq)) + return -1; + + inflight_info = vq->inflight_packed; + if (unlikely(!inflight_info)) + return -1; + + if (unlikely(head >= vq->size)) + return -1; + + last = inflight_info->desc[head].last; + if (unlikely(last >= vq->size)) + return -1; + + inflight_info->desc[last].next = inflight_info->free_head; + inflight_info->free_head = head; + inflight_info->used_idx += inflight_info->desc[head].num; + if (inflight_info->used_idx >= inflight_info->desc_num) { + inflight_info->used_idx -= inflight_info->desc_num; + inflight_info->used_wrap_counter = + !inflight_info->used_wrap_counter; + } + + 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) { struct virtio_net *dev; struct vhost_virtqueue *vq; + uint16_t ret = 0; dev = get_device(vid); if (!dev) return 0; vq = dev->virtqueue[queue_id]; - if (!vq->enabled) + + rte_spinlock_lock(&vq->access_lock); + + if (unlikely(!vq->enabled || vq->avail == NULL)) + goto out; + + ret = *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx; + +out: + rte_spinlock_unlock(&vq->access_lock); + return ret; +} + +static inline int +vhost_enable_notify_split(struct virtio_net *dev, + struct vhost_virtqueue *vq, int enable) +{ + if (vq->used == NULL) + return -1; + + 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; + } + return 0; +} + +static inline int +vhost_enable_notify_packed(struct virtio_net *dev, + struct vhost_virtqueue *vq, int enable) +{ + uint16_t flags; + + if (vq->device_event == NULL) + return -1; + + if (!enable) { + vq->device_event->flags = VRING_EVENT_F_DISABLE; return 0; + } + + 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; + } - return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx; + rte_smp_wmb(); + + vq->device_event->flags = flags; + return 0; } 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; + int ret; + + if (!dev) + return -1; + + vq = dev->virtqueue[queue_id]; + + rte_spinlock_lock(&vq->access_lock); + + if (vq_is_packed(dev)) + ret = vhost_enable_notify_packed(dev, vq, enable); + else + ret = vhost_enable_notify_split(dev, vq, enable); + + rte_spinlock_unlock(&vq->access_lock); + + return ret; +} + +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; + uint32_t ret = 0; + dev = get_device(vid); if (dev == NULL) + return 0; + + if (unlikely(qid >= dev->nr_vring || (qid & 1) == 0)) { + VHOST_LOG_DATA(ERR, "(%d) %s: invalid virtqueue idx %d.\n", + dev->vid, __func__, qid); + return 0; + } + + vq = dev->virtqueue[qid]; + if (vq == NULL) + return 0; + + rte_spinlock_lock(&vq->access_lock); + + if (unlikely(vq->enabled == 0 || vq->avail == NULL)) + goto out; + + ret = *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx; + +out: + rte_spinlock_unlock(&vq->access_lock); + return ret; +} + +struct rte_vdpa_device * +rte_vhost_get_vdpa_device(int vid) +{ + struct virtio_net *dev = get_device(vid); + + if (dev == NULL) + return NULL; + + return dev->vdpa_dev; +} + +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; - if (enable) { - RTE_LOG(ERR, VHOST_CONFIG, - "guest notification isn't supported.\n"); + *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 vhost_virtqueue *vq; + struct virtio_net *dev = get_device(vid); + + if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL) + return -1; + + vq = dev->virtqueue[queue_id]; + if (!vq) return -1; + + if (vq_is_packed(dev)) { + *last_avail_idx = (vq->avail_wrap_counter << 15) | + vq->last_avail_idx; + *last_used_idx = (vq->used_wrap_counter << 15) | + vq->last_used_idx; + } else { + *last_avail_idx = vq->last_avail_idx; + *last_used_idx = vq->last_used_idx; } - dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY; return 0; } -uint64_t rte_vhost_feature_get(void) +int rte_vhost_set_vring_base(int vid, uint16_t queue_id, + uint16_t last_avail_idx, uint16_t last_used_idx) { - return VHOST_FEATURES; + struct vhost_virtqueue *vq; + struct virtio_net *dev = get_device(vid); + + if (!dev) + return -1; + + vq = dev->virtqueue[queue_id]; + if (!vq) + return -1; + + if (vq_is_packed(dev)) { + vq->last_avail_idx = last_avail_idx & 0x7fff; + vq->avail_wrap_counter = !!(last_avail_idx & (1 << 15)); + vq->last_used_idx = last_used_idx & 0x7fff; + vq->used_wrap_counter = !!(last_used_idx & (1 << 15)); + } else { + vq->last_avail_idx = last_avail_idx; + vq->last_used_idx = last_used_idx; + } + + return 0; } -int rte_vhost_feature_disable(uint64_t feature_mask) +int +rte_vhost_get_vring_base_from_inflight(int vid, + uint16_t queue_id, + uint16_t *last_avail_idx, + uint16_t *last_used_idx) { - VHOST_FEATURES = VHOST_FEATURES & ~feature_mask; + struct rte_vhost_inflight_info_packed *inflight_info; + struct virtio_net *dev = get_device(vid); + + if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL) + return -1; + + if (!vq_is_packed(dev)) + return -1; + + inflight_info = dev->virtqueue[queue_id]->inflight_packed; + if (!inflight_info) + return -1; + + *last_avail_idx = (inflight_info->old_used_wrap_counter << 15) | + inflight_info->old_used_idx; + *last_used_idx = *last_avail_idx; + return 0; } -int rte_vhost_feature_enable(uint64_t feature_mask) +int rte_vhost_extern_callback_register(int vid, + struct rte_vhost_user_extern_ops const * const ops, void *ctx) { - if ((feature_mask & VHOST_SUPPORTED_FEATURES) == feature_mask) { - VHOST_FEATURES = VHOST_FEATURES | feature_mask; - return 0; - } - return -1; + struct virtio_net *dev = get_device(vid); + + if (dev == NULL || ops == NULL) + return -1; + + dev->extern_ops = *ops; + dev->extern_data = ctx; + return 0; } -/* - * Register ops so that we can add/remove device to data core. - */ -int -rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const ops) +int rte_vhost_async_channel_register(int vid, uint16_t queue_id, + uint32_t features, + struct rte_vhost_async_channel_ops *ops) { - notify_ops = ops; + struct vhost_virtqueue *vq; + struct virtio_net *dev = get_device(vid); + struct rte_vhost_async_features f; + + if (dev == NULL || ops == NULL) + return -1; + + f.intval = features; + + vq = dev->virtqueue[queue_id]; + + if (unlikely(vq == NULL || !dev->async_copy)) + return -1; + + /* packed queue is not supported */ + if (unlikely(vq_is_packed(dev) || !f.async_inorder)) { + VHOST_LOG_CONFIG(ERR, + "async copy is not supported on packed queue or non-inorder mode " + "(vid %d, qid: %d)\n", vid, queue_id); + return -1; + } + + if (unlikely(ops->check_completed_copies == NULL || + ops->transfer_data == NULL)) + return -1; + + rte_spinlock_lock(&vq->access_lock); + + if (unlikely(vq->async_registered)) { + VHOST_LOG_CONFIG(ERR, + "async register failed: channel already registered " + "(vid %d, qid: %d)\n", vid, queue_id); + goto reg_out; + } + + vq->async_pkts_pending = rte_malloc(NULL, + vq->size * sizeof(uintptr_t), + RTE_CACHE_LINE_SIZE); + vq->async_pending_info = rte_malloc(NULL, + vq->size * sizeof(uint64_t), + RTE_CACHE_LINE_SIZE); + if (!vq->async_pkts_pending || !vq->async_pending_info) { + if (vq->async_pkts_pending) + rte_free(vq->async_pkts_pending); + + if (vq->async_pending_info) + rte_free(vq->async_pending_info); + + VHOST_LOG_CONFIG(ERR, + "async register failed: cannot allocate memory for vq data " + "(vid %d, qid: %d)\n", vid, queue_id); + goto reg_out; + } + + vq->async_ops.check_completed_copies = ops->check_completed_copies; + vq->async_ops.transfer_data = ops->transfer_data; + + vq->async_inorder = f.async_inorder; + vq->async_threshold = f.async_threshold; + + vq->async_registered = true; + +reg_out: + rte_spinlock_unlock(&vq->access_lock); return 0; } + +int rte_vhost_async_channel_unregister(int vid, uint16_t queue_id) +{ + struct vhost_virtqueue *vq; + struct virtio_net *dev = get_device(vid); + int ret = -1; + + if (dev == NULL) + return ret; + + vq = dev->virtqueue[queue_id]; + + if (vq == NULL) + return ret; + + ret = 0; + rte_spinlock_lock(&vq->access_lock); + + if (!vq->async_registered) + goto out; + + if (vq->async_pkts_inflight_n) { + VHOST_LOG_CONFIG(ERR, "Failed to unregister async channel. " + "async inflight packets must be completed before unregistration.\n"); + ret = -1; + goto out; + } + + if (vq->async_pkts_pending) { + rte_free(vq->async_pkts_pending); + vq->async_pkts_pending = NULL; + } + + if (vq->async_pending_info) { + rte_free(vq->async_pending_info); + vq->async_pending_info = NULL; + } + + vq->async_ops.transfer_data = NULL; + vq->async_ops.check_completed_copies = NULL; + vq->async_registered = false; + +out: + rte_spinlock_unlock(&vq->access_lock); + + return ret; +} + +RTE_LOG_REGISTER(vhost_config_log_level, lib.vhost.config, INFO); +RTE_LOG_REGISTER(vhost_data_log_level, lib.vhost.data, WARNING);