1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2020 Red Hat Inc.
11 #include <rte_memory.h>
14 #include "virtio_user_dev.h"
16 /* vhost kernel & vdpa ioctls */
17 #define VHOST_VIRTIO 0xAF
18 #define VHOST_GET_FEATURES _IOR(VHOST_VIRTIO, 0x00, __u64)
19 #define VHOST_SET_FEATURES _IOW(VHOST_VIRTIO, 0x00, __u64)
20 #define VHOST_SET_OWNER _IO(VHOST_VIRTIO, 0x01)
21 #define VHOST_RESET_OWNER _IO(VHOST_VIRTIO, 0x02)
22 #define VHOST_SET_MEM_TABLE _IOW(VHOST_VIRTIO, 0x03, void *)
23 #define VHOST_SET_LOG_BASE _IOW(VHOST_VIRTIO, 0x04, __u64)
24 #define VHOST_SET_LOG_FD _IOW(VHOST_VIRTIO, 0x07, int)
25 #define VHOST_SET_VRING_NUM _IOW(VHOST_VIRTIO, 0x10, struct vhost_vring_state)
26 #define VHOST_SET_VRING_ADDR _IOW(VHOST_VIRTIO, 0x11, struct vhost_vring_addr)
27 #define VHOST_SET_VRING_BASE _IOW(VHOST_VIRTIO, 0x12, struct vhost_vring_state)
28 #define VHOST_GET_VRING_BASE _IOWR(VHOST_VIRTIO, 0x12, struct vhost_vring_state)
29 #define VHOST_SET_VRING_KICK _IOW(VHOST_VIRTIO, 0x20, struct vhost_vring_file)
30 #define VHOST_SET_VRING_CALL _IOW(VHOST_VIRTIO, 0x21, struct vhost_vring_file)
31 #define VHOST_SET_VRING_ERR _IOW(VHOST_VIRTIO, 0x22, struct vhost_vring_file)
32 #define VHOST_NET_SET_BACKEND _IOW(VHOST_VIRTIO, 0x30, struct vhost_vring_file)
33 #define VHOST_VDPA_GET_DEVICE_ID _IOR(VHOST_VIRTIO, 0x70, __u32)
34 #define VHOST_VDPA_GET_STATUS _IOR(VHOST_VIRTIO, 0x71, __u8)
35 #define VHOST_VDPA_SET_STATUS _IOW(VHOST_VIRTIO, 0x72, __u8)
36 #define VHOST_VDPA_SET_VRING_ENABLE _IOW(VHOST_VIRTIO, 0x75, \
37 struct vhost_vring_state)
39 static uint64_t vhost_req_user_to_vdpa[] = {
40 [VHOST_USER_SET_OWNER] = VHOST_SET_OWNER,
41 [VHOST_USER_RESET_OWNER] = VHOST_RESET_OWNER,
42 [VHOST_USER_SET_FEATURES] = VHOST_SET_FEATURES,
43 [VHOST_USER_GET_FEATURES] = VHOST_GET_FEATURES,
44 [VHOST_USER_SET_VRING_CALL] = VHOST_SET_VRING_CALL,
45 [VHOST_USER_SET_VRING_NUM] = VHOST_SET_VRING_NUM,
46 [VHOST_USER_SET_VRING_BASE] = VHOST_SET_VRING_BASE,
47 [VHOST_USER_GET_VRING_BASE] = VHOST_GET_VRING_BASE,
48 [VHOST_USER_SET_VRING_ADDR] = VHOST_SET_VRING_ADDR,
49 [VHOST_USER_SET_VRING_KICK] = VHOST_SET_VRING_KICK,
50 [VHOST_USER_SET_MEM_TABLE] = VHOST_SET_MEM_TABLE,
51 [VHOST_USER_SET_STATUS] = VHOST_VDPA_SET_STATUS,
52 [VHOST_USER_GET_STATUS] = VHOST_VDPA_GET_STATUS,
53 [VHOST_USER_SET_VRING_ENABLE] = VHOST_VDPA_SET_VRING_ENABLE,
56 /* no alignment requirement */
57 struct vhost_iotlb_msg {
61 #define VHOST_ACCESS_RO 0x1
62 #define VHOST_ACCESS_WO 0x2
63 #define VHOST_ACCESS_RW 0x3
65 #define VHOST_IOTLB_MISS 1
66 #define VHOST_IOTLB_UPDATE 2
67 #define VHOST_IOTLB_INVALIDATE 3
68 #define VHOST_IOTLB_ACCESS_FAIL 4
72 #define VHOST_IOTLB_MSG_V2 0x2
78 struct vhost_iotlb_msg iotlb;
84 vhost_vdpa_dma_map(struct virtio_user_dev *dev, void *addr,
85 uint64_t iova, size_t len)
87 struct vhost_msg msg = {};
89 msg.type = VHOST_IOTLB_MSG_V2;
90 msg.iotlb.type = VHOST_IOTLB_UPDATE;
91 msg.iotlb.iova = iova;
92 msg.iotlb.uaddr = (uint64_t)(uintptr_t)addr;
94 msg.iotlb.perm = VHOST_ACCESS_RW;
96 PMD_DRV_LOG(DEBUG, "%s: iova: 0x%" PRIx64 ", addr: %p, len: 0x%zx",
97 __func__, iova, addr, len);
99 if (write(dev->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
100 PMD_DRV_LOG(ERR, "Failed to send IOTLB update (%s)",
109 vhost_vdpa_dma_unmap(struct virtio_user_dev *dev, __rte_unused void *addr,
110 uint64_t iova, size_t len)
112 struct vhost_msg msg = {};
114 msg.type = VHOST_IOTLB_MSG_V2;
115 msg.iotlb.type = VHOST_IOTLB_INVALIDATE;
116 msg.iotlb.iova = iova;
117 msg.iotlb.size = len;
119 PMD_DRV_LOG(DEBUG, "%s: iova: 0x%" PRIx64 ", len: 0x%zx",
120 __func__, iova, len);
122 if (write(dev->vhostfd, &msg, sizeof(msg)) != sizeof(msg)) {
123 PMD_DRV_LOG(ERR, "Failed to send IOTLB invalidate (%s)",
133 vhost_vdpa_map_contig(const struct rte_memseg_list *msl,
134 const struct rte_memseg *ms, size_t len, void *arg)
136 struct virtio_user_dev *dev = arg;
141 return vhost_vdpa_dma_map(dev, ms->addr, ms->iova, len);
145 vhost_vdpa_map(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
148 struct virtio_user_dev *dev = arg;
150 /* skip external memory that isn't a heap */
151 if (msl->external && !msl->heap)
154 /* skip any segments with invalid IOVA addresses */
155 if (ms->iova == RTE_BAD_IOVA)
158 /* if IOVA mode is VA, we've already mapped the internal segments */
159 if (!msl->external && rte_eal_iova_mode() == RTE_IOVA_VA)
162 return vhost_vdpa_dma_map(dev, ms->addr, ms->iova, ms->len);
166 vhost_vdpa_dma_map_all(struct virtio_user_dev *dev)
168 vhost_vdpa_dma_unmap(dev, NULL, 0, SIZE_MAX);
170 if (rte_eal_iova_mode() == RTE_IOVA_VA) {
171 /* with IOVA as VA mode, we can get away with mapping contiguous
172 * chunks rather than going page-by-page.
174 int ret = rte_memseg_contig_walk_thread_unsafe(
175 vhost_vdpa_map_contig, dev);
178 /* we have to continue the walk because we've skipped the
179 * external segments during the config walk.
182 return rte_memseg_walk_thread_unsafe(vhost_vdpa_map, dev);
185 /* with below features, vhost vdpa does not need to do the checksum and TSO,
186 * these info will be passed to virtio_user through virtio net header.
188 #define VHOST_VDPA_GUEST_OFFLOADS_MASK \
189 ((1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
190 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
191 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
192 (1ULL << VIRTIO_NET_F_GUEST_ECN) | \
193 (1ULL << VIRTIO_NET_F_GUEST_UFO))
195 #define VHOST_VDPA_HOST_OFFLOADS_MASK \
196 ((1ULL << VIRTIO_NET_F_HOST_TSO4) | \
197 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
198 (1ULL << VIRTIO_NET_F_CSUM))
201 vhost_vdpa_ioctl(struct virtio_user_dev *dev,
202 enum vhost_user_request req,
208 PMD_DRV_LOG(INFO, "%s", vhost_msg_strings[req]);
210 req_vdpa = vhost_req_user_to_vdpa[req];
212 if (req_vdpa == VHOST_SET_MEM_TABLE)
213 return vhost_vdpa_dma_map_all(dev);
215 if (req_vdpa == VHOST_SET_FEATURES) {
217 *(uint64_t *)arg |= 1ULL << VIRTIO_F_IOMMU_PLATFORM;
219 /* Multiqueue not supported for now */
220 *(uint64_t *)arg &= ~(1ULL << VIRTIO_NET_F_MQ);
224 case VHOST_SET_VRING_NUM:
225 case VHOST_SET_VRING_ADDR:
226 case VHOST_SET_VRING_BASE:
227 case VHOST_GET_VRING_BASE:
228 case VHOST_SET_VRING_KICK:
229 case VHOST_SET_VRING_CALL:
230 PMD_DRV_LOG(DEBUG, "vhostfd=%d, index=%u",
231 dev->vhostfd, *(unsigned int *)arg);
237 ret = ioctl(dev->vhostfd, req_vdpa, arg);
239 PMD_DRV_LOG(ERR, "%s failed: %s",
240 vhost_msg_strings[req], strerror(errno));
246 * Set up environment to talk with a vhost vdpa backend.
249 * - (-1) if fail to set up;
250 * - (>=0) if successful.
253 vhost_vdpa_setup(struct virtio_user_dev *dev)
255 uint32_t did = (uint32_t)-1;
257 dev->vhostfd = open(dev->path, O_RDWR);
258 if (dev->vhostfd < 0) {
259 PMD_DRV_LOG(ERR, "Failed to open %s: %s\n",
260 dev->path, strerror(errno));
264 if (ioctl(dev->vhostfd, VHOST_VDPA_GET_DEVICE_ID, &did) < 0 ||
265 did != VIRTIO_ID_NETWORK) {
266 PMD_DRV_LOG(ERR, "Invalid vdpa device ID: %u\n", did);
274 vhost_vdpa_enable_queue_pair(struct virtio_user_dev *dev,
280 if (dev->qp_enabled[pair_idx] == enable)
283 for (i = 0; i < 2; ++i) {
284 struct vhost_vring_state state = {
285 .index = pair_idx * 2 + i,
289 if (vhost_vdpa_ioctl(dev, VHOST_USER_SET_VRING_ENABLE, &state))
293 dev->qp_enabled[pair_idx] = enable;
298 struct virtio_user_backend_ops virtio_ops_vdpa = {
299 .setup = vhost_vdpa_setup,
300 .send_request = vhost_vdpa_ioctl,
301 .enable_qp = vhost_vdpa_enable_queue_pair,
302 .dma_map = vhost_vdpa_dma_map,
303 .dma_unmap = vhost_vdpa_dma_unmap,