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 uint32_t async_threshold; 223 224 int notif_enable; 225 #define VIRTIO_UNINITIALIZED_NOTIF (-1) 226 227 struct vhost_vring_addr ring_addrs; 228 } __rte_cache_aligned; 229 230 /* Virtio device status as per Virtio specification */ 231 #define VIRTIO_DEVICE_STATUS_RESET 0x00 232 #define VIRTIO_DEVICE_STATUS_ACK 0x01 233 #define VIRTIO_DEVICE_STATUS_DRIVER 0x02 234 #define VIRTIO_DEVICE_STATUS_DRIVER_OK 0x04 235 #define VIRTIO_DEVICE_STATUS_FEATURES_OK 0x08 236 #define VIRTIO_DEVICE_STATUS_DEV_NEED_RESET 0x40 237 #define VIRTIO_DEVICE_STATUS_FAILED 0x80 238 239 #define VHOST_MAX_VRING 0x100 240 #define VHOST_MAX_QUEUE_PAIRS 0x80 241 242 /* Declare IOMMU related bits for older kernels */ 243 #ifndef VIRTIO_F_IOMMU_PLATFORM 244 245 #define VIRTIO_F_IOMMU_PLATFORM 33 246 247 struct vhost_iotlb_msg { 248 __u64 iova; 249 __u64 size; 250 __u64 uaddr; 251 #define VHOST_ACCESS_RO 0x1 252 #define VHOST_ACCESS_WO 0x2 253 #define VHOST_ACCESS_RW 0x3 254 __u8 perm; 255 #define VHOST_IOTLB_MISS 1 256 #define VHOST_IOTLB_UPDATE 2 257 #define VHOST_IOTLB_INVALIDATE 3 258 #define VHOST_IOTLB_ACCESS_FAIL 4 259 __u8 type; 260 }; 261 262 #define VHOST_IOTLB_MSG 0x1 263 264 struct vhost_msg { 265 int type; 266 union { 267 struct vhost_iotlb_msg iotlb; 268 __u8 padding[64]; 269 }; 270 }; 271 #endif 272 273 /* 274 * Define virtio 1.0 for older kernels 275 */ 276 #ifndef VIRTIO_F_VERSION_1 277 #define VIRTIO_F_VERSION_1 32 278 #endif 279 280 /* Declare packed ring related bits for older kernels */ 281 #ifndef VIRTIO_F_RING_PACKED 282 283 #define VIRTIO_F_RING_PACKED 34 284 285 struct vring_packed_desc { 286 uint64_t addr; 287 uint32_t len; 288 uint16_t id; 289 uint16_t flags; 290 }; 291 292 struct vring_packed_desc_event { 293 uint16_t off_wrap; 294 uint16_t flags; 295 }; 296 #endif 297 298 /* 299 * Declare below packed ring defines unconditionally 300 * as Kernel header might use different names. 301 */ 302 #define VRING_DESC_F_AVAIL (1ULL << 7) 303 #define VRING_DESC_F_USED (1ULL << 15) 304 305 #define VRING_EVENT_F_ENABLE 0x0 306 #define VRING_EVENT_F_DISABLE 0x1 307 #define VRING_EVENT_F_DESC 0x2 308 309 /* 310 * Available and used descs are in same order 311 */ 312 #ifndef VIRTIO_F_IN_ORDER 313 #define VIRTIO_F_IN_ORDER 35 314 #endif 315 316 /* Features supported by this builtin vhost-user net driver. */ 317 #define VIRTIO_NET_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \ 318 (1ULL << VIRTIO_F_ANY_LAYOUT) | \ 319 (1ULL << VIRTIO_NET_F_CTRL_VQ) | \ 320 (1ULL << VIRTIO_NET_F_CTRL_RX) | \ 321 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \ 322 (1ULL << VIRTIO_NET_F_MQ) | \ 323 (1ULL << VIRTIO_F_VERSION_1) | \ 324 (1ULL << VHOST_F_LOG_ALL) | \ 325 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \ 326 (1ULL << VIRTIO_NET_F_GSO) | \ 327 (1ULL << VIRTIO_NET_F_HOST_TSO4) | \ 328 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \ 329 (1ULL << VIRTIO_NET_F_HOST_UFO) | \ 330 (1ULL << VIRTIO_NET_F_HOST_ECN) | \ 331 (1ULL << VIRTIO_NET_F_CSUM) | \ 332 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \ 333 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \ 334 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \ 335 (1ULL << VIRTIO_NET_F_GUEST_UFO) | \ 336 (1ULL << VIRTIO_NET_F_GUEST_ECN) | \ 337 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \ 338 (1ULL << VIRTIO_RING_F_EVENT_IDX) | \ 339 (1ULL << VIRTIO_NET_F_MTU) | \ 340 (1ULL << VIRTIO_F_IN_ORDER) | \ 341 (1ULL << VIRTIO_F_IOMMU_PLATFORM) | \ 342 (1ULL << VIRTIO_F_RING_PACKED)) 343 344 345 struct guest_page { 346 uint64_t guest_phys_addr; 347 uint64_t host_phys_addr; 348 uint64_t size; 349 }; 350 351 struct inflight_mem_info { 352 int fd; 353 void *addr; 354 uint64_t size; 355 }; 356 357 /** 358 * Device structure contains all configuration information relating 359 * to the device. 360 */ 361 struct virtio_net { 362 /* Frontend (QEMU) memory and memory region information */ 363 struct rte_vhost_memory *mem; 364 uint64_t features; 365 uint64_t protocol_features; 366 int vid; 367 uint32_t flags; 368 uint16_t vhost_hlen; 369 /* to tell if we need broadcast rarp packet */ 370 int16_t broadcast_rarp; 371 uint32_t nr_vring; 372 int async_copy; 373 int extbuf; 374 int linearbuf; 375 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2]; 376 struct inflight_mem_info *inflight_info; 377 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ) 378 char ifname[IF_NAME_SZ]; 379 uint64_t log_size; 380 uint64_t log_base; 381 uint64_t log_addr; 382 struct rte_ether_addr mac; 383 uint16_t mtu; 384 uint8_t status; 385 386 struct vhost_device_ops const *notify_ops; 387 388 uint32_t nr_guest_pages; 389 uint32_t max_guest_pages; 390 struct guest_page *guest_pages; 391 392 int slave_req_fd; 393 rte_spinlock_t slave_req_lock; 394 395 int postcopy_ufd; 396 int postcopy_listening; 397 398 struct rte_vdpa_device *vdpa_dev; 399 400 /* context data for the external message handlers */ 401 void *extern_data; 402 /* pre and post vhost user message handlers for the device */ 403 struct rte_vhost_user_extern_ops extern_ops; 404 } __rte_cache_aligned; 405 406 static __rte_always_inline bool 407 vq_is_packed(struct virtio_net *dev) 408 { 409 return dev->features & (1ull << VIRTIO_F_RING_PACKED); 410 } 411 412 static inline bool 413 desc_is_avail(struct vring_packed_desc *desc, bool wrap_counter) 414 { 415 uint16_t flags = __atomic_load_n(&desc->flags, __ATOMIC_ACQUIRE); 416 417 return wrap_counter == !!(flags & VRING_DESC_F_AVAIL) && 418 wrap_counter != !!(flags & VRING_DESC_F_USED); 419 } 420 421 static inline void 422 vq_inc_last_used_packed(struct vhost_virtqueue *vq, uint16_t num) 423 { 424 vq->last_used_idx += num; 425 if (vq->last_used_idx >= vq->size) { 426 vq->used_wrap_counter ^= 1; 427 vq->last_used_idx -= vq->size; 428 } 429 } 430 431 static inline void 432 vq_inc_last_avail_packed(struct vhost_virtqueue *vq, uint16_t num) 433 { 434 vq->last_avail_idx += num; 435 if (vq->last_avail_idx >= vq->size) { 436 vq->avail_wrap_counter ^= 1; 437 vq->last_avail_idx -= vq->size; 438 } 439 } 440 441 void __vhost_log_cache_write(struct virtio_net *dev, 442 struct vhost_virtqueue *vq, 443 uint64_t addr, uint64_t len); 444 void __vhost_log_cache_write_iova(struct virtio_net *dev, 445 struct vhost_virtqueue *vq, 446 uint64_t iova, uint64_t len); 447 void __vhost_log_cache_sync(struct virtio_net *dev, 448 struct vhost_virtqueue *vq); 449 void __vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len); 450 void __vhost_log_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, 451 uint64_t iova, uint64_t len); 452 453 static __rte_always_inline void 454 vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len) 455 { 456 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) 457 __vhost_log_write(dev, addr, len); 458 } 459 460 static __rte_always_inline void 461 vhost_log_cache_sync(struct virtio_net *dev, struct vhost_virtqueue *vq) 462 { 463 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) 464 __vhost_log_cache_sync(dev, vq); 465 } 466 467 static __rte_always_inline void 468 vhost_log_cache_write(struct virtio_net *dev, struct vhost_virtqueue *vq, 469 uint64_t addr, uint64_t len) 470 { 471 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) 472 __vhost_log_cache_write(dev, vq, addr, len); 473 } 474 475 static __rte_always_inline void 476 vhost_log_cache_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq, 477 uint64_t offset, uint64_t len) 478 { 479 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) { 480 if (unlikely(vq->log_guest_addr == 0)) 481 return; 482 __vhost_log_cache_write(dev, vq, vq->log_guest_addr + offset, 483 len); 484 } 485 } 486 487 static __rte_always_inline void 488 vhost_log_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq, 489 uint64_t offset, uint64_t len) 490 { 491 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) { 492 if (unlikely(vq->log_guest_addr == 0)) 493 return; 494 __vhost_log_write(dev, vq->log_guest_addr + offset, len); 495 } 496 } 497 498 static __rte_always_inline void 499 vhost_log_cache_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, 500 uint64_t iova, uint64_t len) 501 { 502 if (likely(!(dev->features & (1ULL << VHOST_F_LOG_ALL)))) 503 return; 504 505 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) 506 __vhost_log_cache_write_iova(dev, vq, iova, len); 507 else 508 __vhost_log_cache_write(dev, vq, iova, len); 509 } 510 511 static __rte_always_inline void 512 vhost_log_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq, 513 uint64_t iova, uint64_t len) 514 { 515 if (likely(!(dev->features & (1ULL << VHOST_F_LOG_ALL)))) 516 return; 517 518 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) 519 __vhost_log_write_iova(dev, vq, iova, len); 520 else 521 __vhost_log_write(dev, iova, len); 522 } 523 524 extern int vhost_config_log_level; 525 extern int vhost_data_log_level; 526 527 #define VHOST_LOG_CONFIG(level, fmt, args...) \ 528 rte_log(RTE_LOG_ ## level, vhost_config_log_level, \ 529 "VHOST_CONFIG: " fmt, ##args) 530 531 #define VHOST_LOG_DATA(level, fmt, args...) \ 532 (void)((RTE_LOG_ ## level <= RTE_LOG_DP_LEVEL) ? \ 533 rte_log(RTE_LOG_ ## level, vhost_data_log_level, \ 534 "VHOST_DATA : " fmt, ##args) : \ 535 0) 536 537 #ifdef RTE_LIBRTE_VHOST_DEBUG 538 #define VHOST_MAX_PRINT_BUFF 6072 539 #define PRINT_PACKET(device, addr, size, header) do { \ 540 char *pkt_addr = (char *)(addr); \ 541 unsigned int index; \ 542 char packet[VHOST_MAX_PRINT_BUFF]; \ 543 \ 544 if ((header)) \ 545 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \ 546 else \ 547 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \ 548 for (index = 0; index < (size); index++) { \ 549 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \ 550 "%02hhx ", pkt_addr[index]); \ 551 } \ 552 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \ 553 \ 554 VHOST_LOG_DATA(DEBUG, "%s", packet); \ 555 } while (0) 556 #else 557 #define PRINT_PACKET(device, addr, size, header) do {} while (0) 558 #endif 559 560 #define MAX_VHOST_DEVICE 1024 561 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE]; 562 563 #define VHOST_BINARY_SEARCH_THRESH 256 564 565 static __rte_always_inline int guest_page_addrcmp(const void *p1, 566 const void *p2) 567 { 568 const struct guest_page *page1 = (const struct guest_page *)p1; 569 const struct guest_page *page2 = (const struct guest_page *)p2; 570 571 if (page1->guest_phys_addr > page2->guest_phys_addr) 572 return 1; 573 if (page1->guest_phys_addr < page2->guest_phys_addr) 574 return -1; 575 576 return 0; 577 } 578 579 static __rte_always_inline rte_iova_t 580 gpa_to_first_hpa(struct virtio_net *dev, uint64_t gpa, 581 uint64_t gpa_size, uint64_t *hpa_size) 582 { 583 uint32_t i; 584 struct guest_page *page; 585 struct guest_page key; 586 587 *hpa_size = gpa_size; 588 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) { 589 key.guest_phys_addr = gpa & ~(dev->guest_pages[0].size - 1); 590 page = bsearch(&key, dev->guest_pages, dev->nr_guest_pages, 591 sizeof(struct guest_page), guest_page_addrcmp); 592 if (page) { 593 if (gpa + gpa_size <= 594 page->guest_phys_addr + page->size) { 595 return gpa - page->guest_phys_addr + 596 page->host_phys_addr; 597 } else if (gpa < page->guest_phys_addr + 598 page->size) { 599 *hpa_size = page->guest_phys_addr + 600 page->size - gpa; 601 return gpa - page->guest_phys_addr + 602 page->host_phys_addr; 603 } 604 } 605 } else { 606 for (i = 0; i < dev->nr_guest_pages; i++) { 607 page = &dev->guest_pages[i]; 608 609 if (gpa >= page->guest_phys_addr) { 610 if (gpa + gpa_size <= 611 page->guest_phys_addr + page->size) { 612 return gpa - page->guest_phys_addr + 613 page->host_phys_addr; 614 } else if (gpa < page->guest_phys_addr + 615 page->size) { 616 *hpa_size = page->guest_phys_addr + 617 page->size - gpa; 618 return gpa - page->guest_phys_addr + 619 page->host_phys_addr; 620 } 621 } 622 } 623 } 624 625 *hpa_size = 0; 626 return 0; 627 } 628 629 /* Convert guest physical address to host physical address */ 630 static __rte_always_inline rte_iova_t 631 gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size) 632 { 633 rte_iova_t hpa; 634 uint64_t hpa_size; 635 636 hpa = gpa_to_first_hpa(dev, gpa, size, &hpa_size); 637 return hpa_size == size ? hpa : 0; 638 } 639 640 static __rte_always_inline uint64_t 641 hva_to_gpa(struct virtio_net *dev, uint64_t vva, uint64_t len) 642 { 643 struct rte_vhost_mem_region *r; 644 uint32_t i; 645 646 if (unlikely(!dev || !dev->mem)) 647 return 0; 648 649 for (i = 0; i < dev->mem->nregions; i++) { 650 r = &dev->mem->regions[i]; 651 652 if (vva >= r->host_user_addr && 653 vva + len < r->host_user_addr + r->size) { 654 return r->guest_phys_addr + vva - r->host_user_addr; 655 } 656 } 657 return 0; 658 } 659 660 static __rte_always_inline struct virtio_net * 661 get_device(int vid) 662 { 663 struct virtio_net *dev = vhost_devices[vid]; 664 665 if (unlikely(!dev)) { 666 VHOST_LOG_CONFIG(ERR, 667 "(%d) device not found.\n", vid); 668 } 669 670 return dev; 671 } 672 673 int vhost_new_device(void); 674 void cleanup_device(struct virtio_net *dev, int destroy); 675 void reset_device(struct virtio_net *dev); 676 void vhost_destroy_device(int); 677 void vhost_destroy_device_notify(struct virtio_net *dev); 678 679 void cleanup_vq(struct vhost_virtqueue *vq, int destroy); 680 void cleanup_vq_inflight(struct virtio_net *dev, struct vhost_virtqueue *vq); 681 void free_vq(struct virtio_net *dev, struct vhost_virtqueue *vq); 682 683 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx); 684 685 void vhost_attach_vdpa_device(int vid, struct rte_vdpa_device *dev); 686 687 void vhost_set_ifname(int, const char *if_name, unsigned int if_len); 688 void vhost_setup_virtio_net(int vid, bool enable, bool legacy_ol_flags); 689 void vhost_enable_extbuf(int vid); 690 void vhost_enable_linearbuf(int vid); 691 int vhost_enable_guest_notification(struct virtio_net *dev, 692 struct vhost_virtqueue *vq, int enable); 693 694 struct vhost_device_ops const *vhost_driver_callback_get(const char *path); 695 696 /* 697 * Backend-specific cleanup. 698 * 699 * TODO: fix it; we have one backend now 700 */ 701 void vhost_backend_cleanup(struct virtio_net *dev); 702 703 uint64_t __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, 704 uint64_t iova, uint64_t *len, uint8_t perm); 705 void *vhost_alloc_copy_ind_table(struct virtio_net *dev, 706 struct vhost_virtqueue *vq, 707 uint64_t desc_addr, uint64_t desc_len); 708 int vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq); 709 uint64_t translate_log_addr(struct virtio_net *dev, struct vhost_virtqueue *vq, 710 uint64_t log_addr); 711 void vring_invalidate(struct virtio_net *dev, struct vhost_virtqueue *vq); 712 713 static __rte_always_inline uint64_t 714 vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, 715 uint64_t iova, uint64_t *len, uint8_t perm) 716 { 717 if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) 718 return rte_vhost_va_from_guest_pa(dev->mem, iova, len); 719 720 return __vhost_iova_to_vva(dev, vq, iova, len, perm); 721 } 722 723 #define vhost_avail_event(vr) \ 724 (*(volatile uint16_t*)&(vr)->used->ring[(vr)->size]) 725 #define vhost_used_event(vr) \ 726 (*(volatile uint16_t*)&(vr)->avail->ring[(vr)->size]) 727 728 /* 729 * The following is used with VIRTIO_RING_F_EVENT_IDX. 730 * Assuming a given event_idx value from the other size, if we have 731 * just incremented index from old to new_idx, should we trigger an 732 * event? 733 */ 734 static __rte_always_inline int 735 vhost_need_event(uint16_t event_idx, uint16_t new_idx, uint16_t old) 736 { 737 return (uint16_t)(new_idx - event_idx - 1) < (uint16_t)(new_idx - old); 738 } 739 740 static __rte_always_inline void 741 vhost_vring_call_split(struct virtio_net *dev, struct vhost_virtqueue *vq) 742 { 743 /* Flush used->idx update before we read avail->flags. */ 744 rte_atomic_thread_fence(__ATOMIC_SEQ_CST); 745 746 /* Don't kick guest if we don't reach index specified by guest. */ 747 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) { 748 uint16_t old = vq->signalled_used; 749 uint16_t new = vq->last_used_idx; 750 bool signalled_used_valid = vq->signalled_used_valid; 751 752 vq->signalled_used = new; 753 vq->signalled_used_valid = true; 754 755 VHOST_LOG_DATA(DEBUG, "%s: used_event_idx=%d, old=%d, new=%d\n", 756 __func__, 757 vhost_used_event(vq), 758 old, new); 759 760 if ((vhost_need_event(vhost_used_event(vq), new, old) && 761 (vq->callfd >= 0)) || 762 unlikely(!signalled_used_valid)) { 763 eventfd_write(vq->callfd, (eventfd_t) 1); 764 if (dev->notify_ops->guest_notified) 765 dev->notify_ops->guest_notified(dev->vid); 766 } 767 } else { 768 /* Kick the guest if necessary. */ 769 if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT) 770 && (vq->callfd >= 0)) { 771 eventfd_write(vq->callfd, (eventfd_t)1); 772 if (dev->notify_ops->guest_notified) 773 dev->notify_ops->guest_notified(dev->vid); 774 } 775 } 776 } 777 778 static __rte_always_inline void 779 vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq) 780 { 781 uint16_t old, new, off, off_wrap; 782 bool signalled_used_valid, kick = false; 783 784 /* Flush used desc update. */ 785 rte_atomic_thread_fence(__ATOMIC_SEQ_CST); 786 787 if (!(dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))) { 788 if (vq->driver_event->flags != 789 VRING_EVENT_F_DISABLE) 790 kick = true; 791 goto kick; 792 } 793 794 old = vq->signalled_used; 795 new = vq->last_used_idx; 796 vq->signalled_used = new; 797 signalled_used_valid = vq->signalled_used_valid; 798 vq->signalled_used_valid = true; 799 800 if (vq->driver_event->flags != VRING_EVENT_F_DESC) { 801 if (vq->driver_event->flags != VRING_EVENT_F_DISABLE) 802 kick = true; 803 goto kick; 804 } 805 806 if (unlikely(!signalled_used_valid)) { 807 kick = true; 808 goto kick; 809 } 810 811 rte_atomic_thread_fence(__ATOMIC_ACQUIRE); 812 813 off_wrap = vq->driver_event->off_wrap; 814 off = off_wrap & ~(1 << 15); 815 816 if (new <= old) 817 old -= vq->size; 818 819 if (vq->used_wrap_counter != off_wrap >> 15) 820 off -= vq->size; 821 822 if (vhost_need_event(off, new, old)) 823 kick = true; 824 kick: 825 if (kick) { 826 eventfd_write(vq->callfd, (eventfd_t)1); 827 if (dev->notify_ops->guest_notified) 828 dev->notify_ops->guest_notified(dev->vid); 829 } 830 } 831 832 static __rte_always_inline void 833 free_ind_table(void *idesc) 834 { 835 rte_free(idesc); 836 } 837 838 static __rte_always_inline void 839 restore_mbuf(struct rte_mbuf *m) 840 { 841 uint32_t mbuf_size, priv_size; 842 843 while (m) { 844 priv_size = rte_pktmbuf_priv_size(m->pool); 845 mbuf_size = sizeof(struct rte_mbuf) + priv_size; 846 /* start of buffer is after mbuf structure and priv data */ 847 848 m->buf_addr = (char *)m + mbuf_size; 849 m->buf_iova = rte_mempool_virt2iova(m) + mbuf_size; 850 m = m->next; 851 } 852 } 853 854 static __rte_always_inline bool 855 mbuf_is_consumed(struct rte_mbuf *m) 856 { 857 while (m) { 858 if (rte_mbuf_refcnt_read(m) > 1) 859 return false; 860 m = m->next; 861 } 862 863 return true; 864 } 865 866 #endif /* _VHOST_NET_CDEV_H_ */ 867