1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2018 Intel Corporation 3 */ 4 5 #ifndef _VHOST_NET_CDEV_H_ 6 #define _VHOST_NET_CDEV_H_ 7 #include <stdint.h> 8 #include <stdio.h> 9 #include <stdbool.h> 10 #include <sys/types.h> 11 #include <sys/queue.h> 12 #include <unistd.h> 13 #include <linux/vhost.h> 14 #include <linux/virtio_net.h> 15 #include <sys/socket.h> 16 #include <linux/if.h> 17 18 #include <rte_log.h> 19 #include <rte_ether.h> 20 #include <rte_rwlock.h> 21 #include <rte_malloc.h> 22 23 #include "rte_vhost.h" 24 #include "rte_vdpa.h" 25 #include "rte_vdpa_dev.h" 26 27 #include "rte_vhost_async.h" 28 29 /* Used to indicate that the device is running on a data core */ 30 #define VIRTIO_DEV_RUNNING ((uint32_t)1 << 0) 31 /* Used to indicate that the device is ready to operate */ 32 #define VIRTIO_DEV_READY ((uint32_t)1 << 1) 33 /* Used to indicate that the built-in vhost net device backend is enabled */ 34 #define VIRTIO_DEV_BUILTIN_VIRTIO_NET ((uint32_t)1 << 2) 35 /* Used to indicate that the device has its own data path and configured */ 36 #define VIRTIO_DEV_VDPA_CONFIGURED ((uint32_t)1 << 3) 37 /* Used to indicate that the feature negotiation failed */ 38 #define VIRTIO_DEV_FEATURES_FAILED ((uint32_t)1 << 4) 39 /* Used to indicate that the virtio_net tx code should fill TX ol_flags */ 40 #define VIRTIO_DEV_LEGACY_OL_FLAGS ((uint32_t)1 << 5) 41 42 /* Backend value set by guest. */ 43 #define VIRTIO_DEV_STOPPED -1 44 45 #define BUF_VECTOR_MAX 256 46 47 #define VHOST_LOG_CACHE_NR 32 48 49 #define MAX_PKT_BURST 32 50 51 #define VHOST_MAX_ASYNC_IT (MAX_PKT_BURST * 2) 52 #define VHOST_MAX_ASYNC_VEC (BUF_VECTOR_MAX * 4) 53 54 #define PACKED_DESC_ENQUEUE_USED_FLAG(w) \ 55 ((w) ? (VRING_DESC_F_AVAIL | VRING_DESC_F_USED | VRING_DESC_F_WRITE) : \ 56 VRING_DESC_F_WRITE) 57 #define PACKED_DESC_DEQUEUE_USED_FLAG(w) \ 58 ((w) ? (VRING_DESC_F_AVAIL | VRING_DESC_F_USED) : 0x0) 59 #define PACKED_DESC_SINGLE_DEQUEUE_FLAG (VRING_DESC_F_NEXT | \ 60 VRING_DESC_F_INDIRECT) 61 62 #define PACKED_BATCH_SIZE (RTE_CACHE_LINE_SIZE / \ 63 sizeof(struct vring_packed_desc)) 64 #define PACKED_BATCH_MASK (PACKED_BATCH_SIZE - 1) 65 66 #ifdef VHOST_GCC_UNROLL_PRAGMA 67 #define vhost_for_each_try_unroll(iter, val, size) _Pragma("GCC unroll 4") \ 68 for (iter = val; iter < size; iter++) 69 #endif 70 71 #ifdef VHOST_CLANG_UNROLL_PRAGMA 72 #define vhost_for_each_try_unroll(iter, val, size) _Pragma("unroll 4") \ 73 for (iter = val; iter < size; iter++) 74 #endif 75 76 #ifdef VHOST_ICC_UNROLL_PRAGMA 77 #define vhost_for_each_try_unroll(iter, val, size) _Pragma("unroll (4)") \ 78 for (iter = val; iter < size; iter++) 79 #endif 80 81 #ifndef vhost_for_each_try_unroll 82 #define vhost_for_each_try_unroll(iter, val, num) \ 83 for (iter = val; iter < num; iter++) 84 #endif 85 86 /** 87 * Structure contains buffer address, length and descriptor index 88 * from vring to do scatter RX. 89 */ 90 struct buf_vector { 91 uint64_t buf_iova; 92 uint64_t buf_addr; 93 uint32_t buf_len; 94 uint32_t desc_idx; 95 }; 96 97 /* 98 * Structure contains the info for each batched memory copy. 99 */ 100 struct batch_copy_elem { 101 void *dst; 102 void *src; 103 uint32_t len; 104 uint64_t log_addr; 105 }; 106 107 /* 108 * Structure that contains the info for batched dirty logging. 109 */ 110 struct log_cache_entry { 111 uint32_t offset; 112 unsigned long val; 113 }; 114 115 struct vring_used_elem_packed { 116 uint16_t id; 117 uint16_t flags; 118 uint32_t len; 119 uint32_t count; 120 }; 121 122 /** 123 * Structure contains variables relevant to RX/TX virtqueues. 124 */ 125 struct vhost_virtqueue { 126 union { 127 struct vring_desc *desc; 128 struct vring_packed_desc *desc_packed; 129 }; 130 union { 131 struct vring_avail *avail; 132 struct vring_packed_desc_event *driver_event; 133 }; 134 union { 135 struct vring_used *used; 136 struct vring_packed_desc_event *device_event; 137 }; 138 uint16_t size; 139 140 uint16_t last_avail_idx; 141 uint16_t last_used_idx; 142 /* Last used index we notify to front end. */ 143 uint16_t signalled_used; 144 bool signalled_used_valid; 145 #define VIRTIO_INVALID_EVENTFD (-1) 146 #define VIRTIO_UNINITIALIZED_EVENTFD (-2) 147 148 bool enabled; 149 bool access_ok; 150 bool ready; 151 152 rte_spinlock_t access_lock; 153 154 155 union { 156 struct vring_used_elem *shadow_used_split; 157 struct vring_used_elem_packed *shadow_used_packed; 158 }; 159 uint16_t shadow_used_idx; 160 /* Record packed ring enqueue latest desc cache aligned index */ 161 uint16_t shadow_aligned_idx; 162 /* Record packed ring first dequeue desc index */ 163 uint16_t shadow_last_used_idx; 164 165 uint16_t batch_copy_nb_elems; 166 struct batch_copy_elem *batch_copy_elems; 167 int numa_node; 168 bool used_wrap_counter; 169 bool avail_wrap_counter; 170 171 /* Physical address of used ring, for logging */ 172 uint16_t log_cache_nb_elem; 173 uint64_t log_guest_addr; 174 struct log_cache_entry *log_cache; 175 176 rte_rwlock_t iotlb_lock; 177 rte_rwlock_t iotlb_pending_lock; 178 struct rte_mempool *iotlb_pool; 179 TAILQ_HEAD(, vhost_iotlb_entry) iotlb_list; 180 TAILQ_HEAD(, vhost_iotlb_entry) iotlb_pending_list; 181 int iotlb_cache_nr; 182 183 /* Used to notify the guest (trigger interrupt) */ 184 int callfd; 185 /* Currently unused as polling mode is enabled */ 186 int kickfd; 187 188 /* inflight share memory info */ 189 union { 190 struct rte_vhost_inflight_info_split *inflight_split; 191 struct rte_vhost_inflight_info_packed *inflight_packed; 192 }; 193 struct rte_vhost_resubmit_info *resubmit_inflight; 194 uint64_t global_counter; 195 196 /* operation callbacks for async dma */ 197 struct rte_vhost_async_channel_ops async_ops; 198 199 struct rte_vhost_iov_iter *it_pool; 200 struct iovec *vec_pool; 201 202 /* async data transfer status */ 203 struct async_inflight_info *async_pkts_info; 204 uint16_t async_pkts_idx; 205 uint16_t async_pkts_inflight_n; 206 uint16_t async_last_pkts_n; 207 union { 208 struct vring_used_elem *async_descs_split; 209 struct vring_used_elem_packed *async_buffers_packed; 210 }; 211 union { 212 uint16_t async_desc_idx_split; 213 uint16_t async_buffer_idx_packed; 214 }; 215 union { 216 uint16_t last_async_desc_idx_split; 217 uint16_t last_async_buffer_idx_packed; 218 }; 219 220 /* vq async features */ 221 bool async_registered; 222 223 int notif_enable; 224 #define VIRTIO_UNINITIALIZED_NOTIF (-1) 225 226 struct vhost_vring_addr ring_addrs; 227 } __rte_cache_aligned; 228 229 /* Virtio device status as per Virtio specification */ 230 #define VIRTIO_DEVICE_STATUS_RESET 0x00 231 #define VIRTIO_DEVICE_STATUS_ACK 0x01 232 #define VIRTIO_DEVICE_STATUS_DRIVER 0x02 233 #define VIRTIO_DEVICE_STATUS_DRIVER_OK 0x04 234 #define VIRTIO_DEVICE_STATUS_FEATURES_OK 0x08 235 #define VIRTIO_DEVICE_STATUS_DEV_NEED_RESET 0x40 236 #define VIRTIO_DEVICE_STATUS_FAILED 0x80 237 238 #define VHOST_MAX_VRING 0x100 239 #define VHOST_MAX_QUEUE_PAIRS 0x80 240 241 /* Declare IOMMU related bits for older kernels */ 242 #ifndef VIRTIO_F_IOMMU_PLATFORM 243 244 #define VIRTIO_F_IOMMU_PLATFORM 33 245 246 struct vhost_iotlb_msg { 247 __u64 iova; 248 __u64 size; 249 __u64 uaddr; 250 #define VHOST_ACCESS_RO 0x1 251 #define VHOST_ACCESS_WO 0x2 252 #define VHOST_ACCESS_RW 0x3 253 __u8 perm; 254 #define VHOST_IOTLB_MISS 1 255 #define VHOST_IOTLB_UPDATE 2 256 #define VHOST_IOTLB_INVALIDATE 3 257 #define VHOST_IOTLB_ACCESS_FAIL 4 258 __u8 type; 259 }; 260 261 #define VHOST_IOTLB_MSG 0x1 262 263 struct vhost_msg { 264 int type; 265 union { 266 struct vhost_iotlb_msg iotlb; 267 __u8 padding[64]; 268 }; 269 }; 270 #endif 271 272 /* 273 * Define virtio 1.0 for older kernels 274 */ 275 #ifndef VIRTIO_F_VERSION_1 276 #define VIRTIO_F_VERSION_1 32 277 #endif 278 279 /* Declare packed ring related bits for older kernels */ 280 #ifndef VIRTIO_F_RING_PACKED 281 282 #define VIRTIO_F_RING_PACKED 34 283 284 struct vring_packed_desc { 285 uint64_t addr; 286 uint32_t len; 287 uint16_t id; 288 uint16_t flags; 289 }; 290 291 struct vring_packed_desc_event { 292 uint16_t off_wrap; 293 uint16_t flags; 294 }; 295 #endif 296 297 /* 298 * Declare below packed ring defines unconditionally 299 * as Kernel header might use different names. 300 */ 301 #define VRING_DESC_F_AVAIL (1ULL << 7) 302 #define VRING_DESC_F_USED (1ULL << 15) 303 304 #define VRING_EVENT_F_ENABLE 0x0 305 #define VRING_EVENT_F_DISABLE 0x1 306 #define VRING_EVENT_F_DESC 0x2 307 308 /* 309 * Available and used descs are in same order 310 */ 311 #ifndef VIRTIO_F_IN_ORDER 312 #define VIRTIO_F_IN_ORDER 35 313 #endif 314 315 /* Features supported by this builtin vhost-user net driver. */ 316 #define VIRTIO_NET_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \ 317 (1ULL << VIRTIO_F_ANY_LAYOUT) | \ 318 (1ULL << VIRTIO_NET_F_CTRL_VQ) | \ 319 (1ULL << VIRTIO_NET_F_CTRL_RX) | \ 320 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \ 321 (1ULL << VIRTIO_NET_F_MQ) | \ 322 (1ULL << VIRTIO_F_VERSION_1) | \ 323 (1ULL << VHOST_F_LOG_ALL) | \ 324 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \ 325 (1ULL << VIRTIO_NET_F_GSO) | \ 326 (1ULL << VIRTIO_NET_F_HOST_TSO4) | \ 327 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \ 328 (1ULL << VIRTIO_NET_F_HOST_UFO) | \ 329 (1ULL << VIRTIO_NET_F_HOST_ECN) | \ 330 (1ULL << VIRTIO_NET_F_CSUM) | \ 331 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \ 332 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \ 333 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \ 334 (1ULL << VIRTIO_NET_F_GUEST_UFO) | \ 335 (1ULL << VIRTIO_NET_F_GUEST_ECN) | \ 336 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \ 337 (1ULL << VIRTIO_RING_F_EVENT_IDX) | \ 338 (1ULL << VIRTIO_NET_F_MTU) | \ 339 (1ULL << VIRTIO_F_IN_ORDER) | \ 340 (1ULL << VIRTIO_F_IOMMU_PLATFORM) | \ 341 (1ULL << VIRTIO_F_RING_PACKED)) 342 343 344 struct guest_page { 345 uint64_t guest_phys_addr; 346 uint64_t host_phys_addr; 347 uint64_t size; 348 }; 349 350 struct inflight_mem_info { 351 int fd; 352 void *addr; 353 uint64_t size; 354 }; 355 356 /** 357 * Device structure contains all configuration information relating 358 * to the device. 359 */ 360 struct virtio_net { 361 /* Frontend (QEMU) memory and memory region information */ 362 struct rte_vhost_memory *mem; 363 uint64_t features; 364 uint64_t protocol_features; 365 int vid; 366 uint32_t flags; 367 uint16_t vhost_hlen; 368 /* to tell if we need broadcast rarp packet */ 369 int16_t broadcast_rarp; 370 uint32_t nr_vring; 371 int async_copy; 372 int extbuf; 373 int linearbuf; 374 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2]; 375 struct inflight_mem_info *inflight_info; 376 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ) 377 char ifname[IF_NAME_SZ]; 378 uint64_t log_size; 379 uint64_t log_base; 380 uint64_t log_addr; 381 struct rte_ether_addr mac; 382 uint16_t mtu; 383 uint8_t status; 384 385 struct vhost_device_ops const *notify_ops; 386 387 uint32_t nr_guest_pages; 388 uint32_t max_guest_pages; 389 struct guest_page *guest_pages; 390 391 int slave_req_fd; 392 rte_spinlock_t slave_req_lock; 393 394 int postcopy_ufd; 395 int postcopy_listening; 396 397 struct rte_vdpa_device *vdpa_dev; 398 399 /* context data for the external message handlers */ 400 void *extern_data; 401 /* pre and post vhost user message handlers for the device */ 402 struct rte_vhost_user_extern_ops extern_ops; 403 } __rte_cache_aligned; 404 405 static __rte_always_inline bool 406 vq_is_packed(struct virtio_net *dev) 407 { 408 return dev->features & (1ull << VIRTIO_F_RING_PACKED); 409 } 410 411 static inline bool 412 desc_is_avail(struct vring_packed_desc *desc, bool wrap_counter) 413 { 414 uint16_t flags = __atomic_load_n(&desc->flags, __ATOMIC_ACQUIRE); 415 416 return wrap_counter == !!(flags & VRING_DESC_F_AVAIL) && 417 wrap_counter != !!(flags & VRING_DESC_F_USED); 418 } 419 420 static inline void 421 vq_inc_last_used_packed(struct vhost_virtqueue *vq, uint16_t num) 422 { 423 vq->last_used_idx += num; 424 if (vq->last_used_idx >= vq->size) { 425 vq->used_wrap_counter ^= 1; 426 vq->last_used_idx -= vq->size; 427 } 428 } 429 430 static inline void 431 vq_inc_last_avail_packed(struct vhost_virtqueue *vq, uint16_t num) 432 { 433 vq->last_avail_idx += num; 434 if (vq->last_avail_idx >= vq->size) { 435 vq->avail_wrap_counter ^= 1; 436 vq->last_avail_idx -= vq->size; 437 } 438 } 439 440 void __vhost_log_cache_write(struct virtio_net *dev, 441 struct vhost_virtqueue *vq, 442 uint64_t addr, uint64_t len); 443 void __vhost_log_cache_write_iova(struct virtio_net *dev, 444 struct vhost_virtqueue *vq, 445 uint64_t iova, uint64_t len); 446 void __vhost_log_cache_sync(struct virtio_net *dev, 447 struct vhost_virtqueue *vq); 448 void __vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len); 449 void __vhost_log_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, 450 uint64_t iova, uint64_t len); 451 452 static __rte_always_inline void 453 vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len) 454 { 455 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) 456 __vhost_log_write(dev, addr, len); 457 } 458 459 static __rte_always_inline void 460 vhost_log_cache_sync(struct virtio_net *dev, struct vhost_virtqueue *vq) 461 { 462 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) 463 __vhost_log_cache_sync(dev, vq); 464 } 465 466 static __rte_always_inline void 467 vhost_log_cache_write(struct virtio_net *dev, struct vhost_virtqueue *vq, 468 uint64_t addr, uint64_t len) 469 { 470 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) 471 __vhost_log_cache_write(dev, vq, addr, len); 472 } 473 474 static __rte_always_inline void 475 vhost_log_cache_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq, 476 uint64_t offset, uint64_t len) 477 { 478 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) { 479 if (unlikely(vq->log_guest_addr == 0)) 480 return; 481 __vhost_log_cache_write(dev, vq, vq->log_guest_addr + offset, 482 len); 483 } 484 } 485 486 static __rte_always_inline void 487 vhost_log_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq, 488 uint64_t offset, uint64_t len) 489 { 490 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) { 491 if (unlikely(vq->log_guest_addr == 0)) 492 return; 493 __vhost_log_write(dev, vq->log_guest_addr + offset, len); 494 } 495 } 496 497 static __rte_always_inline void 498 vhost_log_cache_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, 499 uint64_t iova, uint64_t len) 500 { 501 if (likely(!(dev->features & (1ULL << VHOST_F_LOG_ALL)))) 502 return; 503 504 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) 505 __vhost_log_cache_write_iova(dev, vq, iova, len); 506 else 507 __vhost_log_cache_write(dev, vq, iova, len); 508 } 509 510 static __rte_always_inline void 511 vhost_log_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, 512 uint64_t iova, uint64_t len) 513 { 514 if (likely(!(dev->features & (1ULL << VHOST_F_LOG_ALL)))) 515 return; 516 517 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) 518 __vhost_log_write_iova(dev, vq, iova, len); 519 else 520 __vhost_log_write(dev, iova, len); 521 } 522 523 extern int vhost_config_log_level; 524 extern int vhost_data_log_level; 525 526 #define VHOST_LOG_CONFIG(level, fmt, args...) \ 527 rte_log(RTE_LOG_ ## level, vhost_config_log_level, \ 528 "VHOST_CONFIG: " fmt, ##args) 529 530 #define VHOST_LOG_DATA(level, fmt, args...) \ 531 (void)((RTE_LOG_ ## level <= RTE_LOG_DP_LEVEL) ? \ 532 rte_log(RTE_LOG_ ## level, vhost_data_log_level, \ 533 "VHOST_DATA : " fmt, ##args) : \ 534 0) 535 536 #ifdef RTE_LIBRTE_VHOST_DEBUG 537 #define VHOST_MAX_PRINT_BUFF 6072 538 #define PRINT_PACKET(device, addr, size, header) do { \ 539 char *pkt_addr = (char *)(addr); \ 540 unsigned int index; \ 541 char packet[VHOST_MAX_PRINT_BUFF]; \ 542 \ 543 if ((header)) \ 544 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \ 545 else \ 546 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \ 547 for (index = 0; index < (size); index++) { \ 548 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \ 549 "%02hhx ", pkt_addr[index]); \ 550 } \ 551 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \ 552 \ 553 VHOST_LOG_DATA(DEBUG, "%s", packet); \ 554 } while (0) 555 #else 556 #define PRINT_PACKET(device, addr, size, header) do {} while (0) 557 #endif 558 559 #define MAX_VHOST_DEVICE 1024 560 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE]; 561 562 #define VHOST_BINARY_SEARCH_THRESH 256 563 564 static __rte_always_inline int guest_page_addrcmp(const void *p1, 565 const void *p2) 566 { 567 const struct guest_page *page1 = (const struct guest_page *)p1; 568 const struct guest_page *page2 = (const struct guest_page *)p2; 569 570 if (page1->guest_phys_addr > page2->guest_phys_addr) 571 return 1; 572 if (page1->guest_phys_addr < page2->guest_phys_addr) 573 return -1; 574 575 return 0; 576 } 577 578 static __rte_always_inline rte_iova_t 579 gpa_to_first_hpa(struct virtio_net *dev, uint64_t gpa, 580 uint64_t gpa_size, uint64_t *hpa_size) 581 { 582 uint32_t i; 583 struct guest_page *page; 584 struct guest_page key; 585 586 *hpa_size = gpa_size; 587 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) { 588 key.guest_phys_addr = gpa & ~(dev->guest_pages[0].size - 1); 589 page = bsearch(&key, dev->guest_pages, dev->nr_guest_pages, 590 sizeof(struct guest_page), guest_page_addrcmp); 591 if (page) { 592 if (gpa + gpa_size <= 593 page->guest_phys_addr + page->size) { 594 return gpa - page->guest_phys_addr + 595 page->host_phys_addr; 596 } else if (gpa < page->guest_phys_addr + 597 page->size) { 598 *hpa_size = page->guest_phys_addr + 599 page->size - gpa; 600 return gpa - page->guest_phys_addr + 601 page->host_phys_addr; 602 } 603 } 604 } else { 605 for (i = 0; i < dev->nr_guest_pages; i++) { 606 page = &dev->guest_pages[i]; 607 608 if (gpa >= page->guest_phys_addr) { 609 if (gpa + gpa_size <= 610 page->guest_phys_addr + page->size) { 611 return gpa - page->guest_phys_addr + 612 page->host_phys_addr; 613 } else if (gpa < page->guest_phys_addr + 614 page->size) { 615 *hpa_size = page->guest_phys_addr + 616 page->size - gpa; 617 return gpa - page->guest_phys_addr + 618 page->host_phys_addr; 619 } 620 } 621 } 622 } 623 624 *hpa_size = 0; 625 return 0; 626 } 627 628 /* Convert guest physical address to host physical address */ 629 static __rte_always_inline rte_iova_t 630 gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size) 631 { 632 rte_iova_t hpa; 633 uint64_t hpa_size; 634 635 hpa = gpa_to_first_hpa(dev, gpa, size, &hpa_size); 636 return hpa_size == size ? hpa : 0; 637 } 638 639 static __rte_always_inline uint64_t 640 hva_to_gpa(struct virtio_net *dev, uint64_t vva, uint64_t len) 641 { 642 struct rte_vhost_mem_region *r; 643 uint32_t i; 644 645 if (unlikely(!dev || !dev->mem)) 646 return 0; 647 648 for (i = 0; i < dev->mem->nregions; i++) { 649 r = &dev->mem->regions[i]; 650 651 if (vva >= r->host_user_addr && 652 vva + len < r->host_user_addr + r->size) { 653 return r->guest_phys_addr + vva - r->host_user_addr; 654 } 655 } 656 return 0; 657 } 658 659 static __rte_always_inline struct virtio_net * 660 get_device(int vid) 661 { 662 struct virtio_net *dev = vhost_devices[vid]; 663 664 if (unlikely(!dev)) { 665 VHOST_LOG_CONFIG(ERR, 666 "(%d) device not found.\n", vid); 667 } 668 669 return dev; 670 } 671 672 int vhost_new_device(void); 673 void cleanup_device(struct virtio_net *dev, int destroy); 674 void reset_device(struct virtio_net *dev); 675 void vhost_destroy_device(int); 676 void vhost_destroy_device_notify(struct virtio_net *dev); 677 678 void cleanup_vq(struct vhost_virtqueue *vq, int destroy); 679 void cleanup_vq_inflight(struct virtio_net *dev, struct vhost_virtqueue *vq); 680 void free_vq(struct virtio_net *dev, struct vhost_virtqueue *vq); 681 682 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx); 683 684 void vhost_attach_vdpa_device(int vid, struct rte_vdpa_device *dev); 685 686 void vhost_set_ifname(int, const char *if_name, unsigned int if_len); 687 void vhost_setup_virtio_net(int vid, bool enable, bool legacy_ol_flags); 688 void vhost_enable_extbuf(int vid); 689 void vhost_enable_linearbuf(int vid); 690 int vhost_enable_guest_notification(struct virtio_net *dev, 691 struct vhost_virtqueue *vq, int enable); 692 693 struct vhost_device_ops const *vhost_driver_callback_get(const char *path); 694 695 /* 696 * Backend-specific cleanup. 697 * 698 * TODO: fix it; we have one backend now 699 */ 700 void vhost_backend_cleanup(struct virtio_net *dev); 701 702 uint64_t __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, 703 uint64_t iova, uint64_t *len, uint8_t perm); 704 void *vhost_alloc_copy_ind_table(struct virtio_net *dev, 705 struct vhost_virtqueue *vq, 706 uint64_t desc_addr, uint64_t desc_len); 707 int vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq); 708 uint64_t translate_log_addr(struct virtio_net *dev, struct vhost_virtqueue *vq, 709 uint64_t log_addr); 710 void vring_invalidate(struct virtio_net *dev, struct vhost_virtqueue *vq); 711 712 static __rte_always_inline uint64_t 713 vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, 714 uint64_t iova, uint64_t *len, uint8_t perm) 715 { 716 if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) 717 return rte_vhost_va_from_guest_pa(dev->mem, iova, len); 718 719 return __vhost_iova_to_vva(dev, vq, iova, len, perm); 720 } 721 722 #define vhost_avail_event(vr) \ 723 (*(volatile uint16_t*)&(vr)->used->ring[(vr)->size]) 724 #define vhost_used_event(vr) \ 725 (*(volatile uint16_t*)&(vr)->avail->ring[(vr)->size]) 726 727 /* 728 * The following is used with VIRTIO_RING_F_EVENT_IDX. 729 * Assuming a given event_idx value from the other size, if we have 730 * just incremented index from old to new_idx, should we trigger an 731 * event? 732 */ 733 static __rte_always_inline int 734 vhost_need_event(uint16_t event_idx, uint16_t new_idx, uint16_t old) 735 { 736 return (uint16_t)(new_idx - event_idx - 1) < (uint16_t)(new_idx - old); 737 } 738 739 static __rte_always_inline void 740 vhost_vring_call_split(struct virtio_net *dev, struct vhost_virtqueue *vq) 741 { 742 /* Flush used->idx update before we read avail->flags. */ 743 rte_atomic_thread_fence(__ATOMIC_SEQ_CST); 744 745 /* Don't kick guest if we don't reach index specified by guest. */ 746 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) { 747 uint16_t old = vq->signalled_used; 748 uint16_t new = vq->last_used_idx; 749 bool signalled_used_valid = vq->signalled_used_valid; 750 751 vq->signalled_used = new; 752 vq->signalled_used_valid = true; 753 754 VHOST_LOG_DATA(DEBUG, "%s: used_event_idx=%d, old=%d, new=%d\n", 755 __func__, 756 vhost_used_event(vq), 757 old, new); 758 759 if ((vhost_need_event(vhost_used_event(vq), new, old) && 760 (vq->callfd >= 0)) || 761 unlikely(!signalled_used_valid)) { 762 eventfd_write(vq->callfd, (eventfd_t) 1); 763 if (dev->notify_ops->guest_notified) 764 dev->notify_ops->guest_notified(dev->vid); 765 } 766 } else { 767 /* Kick the guest if necessary. */ 768 if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT) 769 && (vq->callfd >= 0)) { 770 eventfd_write(vq->callfd, (eventfd_t)1); 771 if (dev->notify_ops->guest_notified) 772 dev->notify_ops->guest_notified(dev->vid); 773 } 774 } 775 } 776 777 static __rte_always_inline void 778 vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq) 779 { 780 uint16_t old, new, off, off_wrap; 781 bool signalled_used_valid, kick = false; 782 783 /* Flush used desc update. */ 784 rte_atomic_thread_fence(__ATOMIC_SEQ_CST); 785 786 if (!(dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))) { 787 if (vq->driver_event->flags != 788 VRING_EVENT_F_DISABLE) 789 kick = true; 790 goto kick; 791 } 792 793 old = vq->signalled_used; 794 new = vq->last_used_idx; 795 vq->signalled_used = new; 796 signalled_used_valid = vq->signalled_used_valid; 797 vq->signalled_used_valid = true; 798 799 if (vq->driver_event->flags != VRING_EVENT_F_DESC) { 800 if (vq->driver_event->flags != VRING_EVENT_F_DISABLE) 801 kick = true; 802 goto kick; 803 } 804 805 if (unlikely(!signalled_used_valid)) { 806 kick = true; 807 goto kick; 808 } 809 810 rte_atomic_thread_fence(__ATOMIC_ACQUIRE); 811 812 off_wrap = vq->driver_event->off_wrap; 813 off = off_wrap & ~(1 << 15); 814 815 if (new <= old) 816 old -= vq->size; 817 818 if (vq->used_wrap_counter != off_wrap >> 15) 819 off -= vq->size; 820 821 if (vhost_need_event(off, new, old)) 822 kick = true; 823 kick: 824 if (kick) { 825 eventfd_write(vq->callfd, (eventfd_t)1); 826 if (dev->notify_ops->guest_notified) 827 dev->notify_ops->guest_notified(dev->vid); 828 } 829 } 830 831 static __rte_always_inline void 832 free_ind_table(void *idesc) 833 { 834 rte_free(idesc); 835 } 836 837 static __rte_always_inline void 838 restore_mbuf(struct rte_mbuf *m) 839 { 840 uint32_t mbuf_size, priv_size; 841 842 while (m) { 843 priv_size = rte_pktmbuf_priv_size(m->pool); 844 mbuf_size = sizeof(struct rte_mbuf) + priv_size; 845 /* start of buffer is after mbuf structure and priv data */ 846 847 m->buf_addr = (char *)m + mbuf_size; 848 m->buf_iova = rte_mempool_virt2iova(m) + mbuf_size; 849 m = m->next; 850 } 851 } 852 853 static __rte_always_inline bool 854 mbuf_is_consumed(struct rte_mbuf *m) 855 { 856 while (m) { 857 if (rte_mbuf_refcnt_read(m) > 1) 858 return false; 859 m = m->next; 860 } 861 862 return true; 863 } 864 865 #endif /* _VHOST_NET_CDEV_H_ */ 866