1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2016 Intel Corporation 3 */ 4 5 #include <stdint.h> 6 #include <string.h> 7 #include <stdio.h> 8 #include <errno.h> 9 #include <unistd.h> 10 11 #include <rte_ethdev_driver.h> 12 #include <rte_ethdev_pci.h> 13 #include <rte_memcpy.h> 14 #include <rte_string_fns.h> 15 #include <rte_memzone.h> 16 #include <rte_malloc.h> 17 #include <rte_branch_prediction.h> 18 #include <rte_pci.h> 19 #include <rte_bus_pci.h> 20 #include <rte_ether.h> 21 #include <rte_ip.h> 22 #include <rte_arp.h> 23 #include <rte_common.h> 24 #include <rte_errno.h> 25 #include <rte_cpuflags.h> 26 27 #include <rte_memory.h> 28 #include <rte_eal.h> 29 #include <rte_dev.h> 30 #include <rte_cycles.h> 31 #include <rte_kvargs.h> 32 33 #include "virtio_ethdev.h" 34 #include "virtio_pci.h" 35 #include "virtio_logs.h" 36 #include "virtqueue.h" 37 #include "virtio_rxtx.h" 38 39 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev); 40 static int virtio_dev_configure(struct rte_eth_dev *dev); 41 static int virtio_dev_start(struct rte_eth_dev *dev); 42 static void virtio_dev_stop(struct rte_eth_dev *dev); 43 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev); 44 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev); 45 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev); 46 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev); 47 static void virtio_dev_info_get(struct rte_eth_dev *dev, 48 struct rte_eth_dev_info *dev_info); 49 static int virtio_dev_link_update(struct rte_eth_dev *dev, 50 int wait_to_complete); 51 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask); 52 53 static void virtio_set_hwaddr(struct virtio_hw *hw); 54 static void virtio_get_hwaddr(struct virtio_hw *hw); 55 56 static int virtio_dev_stats_get(struct rte_eth_dev *dev, 57 struct rte_eth_stats *stats); 58 static int virtio_dev_xstats_get(struct rte_eth_dev *dev, 59 struct rte_eth_xstat *xstats, unsigned n); 60 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev, 61 struct rte_eth_xstat_name *xstats_names, 62 unsigned limit); 63 static void virtio_dev_stats_reset(struct rte_eth_dev *dev); 64 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev); 65 static int virtio_vlan_filter_set(struct rte_eth_dev *dev, 66 uint16_t vlan_id, int on); 67 static int virtio_mac_addr_add(struct rte_eth_dev *dev, 68 struct ether_addr *mac_addr, 69 uint32_t index, uint32_t vmdq); 70 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index); 71 static int virtio_mac_addr_set(struct rte_eth_dev *dev, 72 struct ether_addr *mac_addr); 73 74 static int virtio_intr_disable(struct rte_eth_dev *dev); 75 76 static int virtio_dev_queue_stats_mapping_set( 77 struct rte_eth_dev *eth_dev, 78 uint16_t queue_id, 79 uint8_t stat_idx, 80 uint8_t is_rx); 81 82 int virtio_logtype_init; 83 int virtio_logtype_driver; 84 85 static void virtio_notify_peers(struct rte_eth_dev *dev); 86 static void virtio_ack_link_announce(struct rte_eth_dev *dev); 87 88 /* 89 * The set of PCI devices this driver supports 90 */ 91 static const struct rte_pci_id pci_id_virtio_map[] = { 92 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) }, 93 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) }, 94 { .vendor_id = 0, /* sentinel */ }, 95 }; 96 97 struct rte_virtio_xstats_name_off { 98 char name[RTE_ETH_XSTATS_NAME_SIZE]; 99 unsigned offset; 100 }; 101 102 /* [rt]x_qX_ is prepended to the name string here */ 103 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = { 104 {"good_packets", offsetof(struct virtnet_rx, stats.packets)}, 105 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)}, 106 {"errors", offsetof(struct virtnet_rx, stats.errors)}, 107 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)}, 108 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)}, 109 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])}, 110 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])}, 111 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])}, 112 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])}, 113 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])}, 114 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])}, 115 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])}, 116 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])}, 117 }; 118 119 /* [rt]x_qX_ is prepended to the name string here */ 120 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = { 121 {"good_packets", offsetof(struct virtnet_tx, stats.packets)}, 122 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)}, 123 {"errors", offsetof(struct virtnet_tx, stats.errors)}, 124 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)}, 125 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)}, 126 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])}, 127 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])}, 128 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])}, 129 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])}, 130 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])}, 131 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])}, 132 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])}, 133 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])}, 134 }; 135 136 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \ 137 sizeof(rte_virtio_rxq_stat_strings[0])) 138 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \ 139 sizeof(rte_virtio_txq_stat_strings[0])) 140 141 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS]; 142 143 static int 144 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, 145 int *dlen, int pkt_num) 146 { 147 uint32_t head, i; 148 int k, sum = 0; 149 virtio_net_ctrl_ack status = ~0; 150 struct virtio_pmd_ctrl *result; 151 struct virtqueue *vq; 152 153 ctrl->status = status; 154 155 if (!cvq || !cvq->vq) { 156 PMD_INIT_LOG(ERR, "Control queue is not supported."); 157 return -1; 158 } 159 160 rte_spinlock_lock(&cvq->lock); 161 vq = cvq->vq; 162 head = vq->vq_desc_head_idx; 163 164 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, " 165 "vq->hw->cvq = %p vq = %p", 166 vq->vq_desc_head_idx, status, vq->hw->cvq, vq); 167 168 if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) { 169 rte_spinlock_unlock(&cvq->lock); 170 return -1; 171 } 172 173 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl, 174 sizeof(struct virtio_pmd_ctrl)); 175 176 /* 177 * Format is enforced in qemu code: 178 * One TX packet for header; 179 * At least one TX packet per argument; 180 * One RX packet for ACK. 181 */ 182 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT; 183 vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem; 184 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr); 185 vq->vq_free_cnt--; 186 i = vq->vq_ring.desc[head].next; 187 188 for (k = 0; k < pkt_num; k++) { 189 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT; 190 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 191 + sizeof(struct virtio_net_ctrl_hdr) 192 + sizeof(ctrl->status) + sizeof(uint8_t)*sum; 193 vq->vq_ring.desc[i].len = dlen[k]; 194 sum += dlen[k]; 195 vq->vq_free_cnt--; 196 i = vq->vq_ring.desc[i].next; 197 } 198 199 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE; 200 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 201 + sizeof(struct virtio_net_ctrl_hdr); 202 vq->vq_ring.desc[i].len = sizeof(ctrl->status); 203 vq->vq_free_cnt--; 204 205 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next; 206 207 vq_update_avail_ring(vq, head); 208 vq_update_avail_idx(vq); 209 210 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index); 211 212 virtqueue_notify(vq); 213 214 rte_rmb(); 215 while (VIRTQUEUE_NUSED(vq) == 0) { 216 rte_rmb(); 217 usleep(100); 218 } 219 220 while (VIRTQUEUE_NUSED(vq)) { 221 uint32_t idx, desc_idx, used_idx; 222 struct vring_used_elem *uep; 223 224 used_idx = (uint32_t)(vq->vq_used_cons_idx 225 & (vq->vq_nentries - 1)); 226 uep = &vq->vq_ring.used->ring[used_idx]; 227 idx = (uint32_t) uep->id; 228 desc_idx = idx; 229 230 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) { 231 desc_idx = vq->vq_ring.desc[desc_idx].next; 232 vq->vq_free_cnt++; 233 } 234 235 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx; 236 vq->vq_desc_head_idx = idx; 237 238 vq->vq_used_cons_idx++; 239 vq->vq_free_cnt++; 240 } 241 242 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d", 243 vq->vq_free_cnt, vq->vq_desc_head_idx); 244 245 result = cvq->virtio_net_hdr_mz->addr; 246 247 rte_spinlock_unlock(&cvq->lock); 248 return result->status; 249 } 250 251 static int 252 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues) 253 { 254 struct virtio_hw *hw = dev->data->dev_private; 255 struct virtio_pmd_ctrl ctrl; 256 int dlen[1]; 257 int ret; 258 259 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ; 260 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET; 261 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t)); 262 263 dlen[0] = sizeof(uint16_t); 264 265 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 266 if (ret) { 267 PMD_INIT_LOG(ERR, "Multiqueue configured but send command " 268 "failed, this is too late now..."); 269 return -EINVAL; 270 } 271 272 return 0; 273 } 274 275 static void 276 virtio_dev_queue_release(void *queue __rte_unused) 277 { 278 /* do nothing */ 279 } 280 281 static uint16_t 282 virtio_get_nr_vq(struct virtio_hw *hw) 283 { 284 uint16_t nr_vq = hw->max_queue_pairs * 2; 285 286 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 287 nr_vq += 1; 288 289 return nr_vq; 290 } 291 292 static void 293 virtio_init_vring(struct virtqueue *vq) 294 { 295 int size = vq->vq_nentries; 296 struct vring *vr = &vq->vq_ring; 297 uint8_t *ring_mem = vq->vq_ring_virt_mem; 298 299 PMD_INIT_FUNC_TRACE(); 300 301 /* 302 * Reinitialise since virtio port might have been stopped and restarted 303 */ 304 memset(ring_mem, 0, vq->vq_ring_size); 305 vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN); 306 vq->vq_used_cons_idx = 0; 307 vq->vq_desc_head_idx = 0; 308 vq->vq_avail_idx = 0; 309 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1); 310 vq->vq_free_cnt = vq->vq_nentries; 311 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries); 312 313 vring_desc_init(vr->desc, size); 314 315 /* 316 * Disable device(host) interrupting guest 317 */ 318 virtqueue_disable_intr(vq); 319 } 320 321 static int 322 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) 323 { 324 char vq_name[VIRTQUEUE_MAX_NAME_SZ]; 325 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ]; 326 const struct rte_memzone *mz = NULL, *hdr_mz = NULL; 327 unsigned int vq_size, size; 328 struct virtio_hw *hw = dev->data->dev_private; 329 struct virtnet_rx *rxvq = NULL; 330 struct virtnet_tx *txvq = NULL; 331 struct virtnet_ctl *cvq = NULL; 332 struct virtqueue *vq; 333 size_t sz_hdr_mz = 0; 334 void *sw_ring = NULL; 335 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx); 336 int ret; 337 338 PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx); 339 340 /* 341 * Read the virtqueue size from the Queue Size field 342 * Always power of 2 and if 0 virtqueue does not exist 343 */ 344 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx); 345 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size); 346 if (vq_size == 0) { 347 PMD_INIT_LOG(ERR, "virtqueue does not exist"); 348 return -EINVAL; 349 } 350 351 if (!rte_is_power_of_2(vq_size)) { 352 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2"); 353 return -EINVAL; 354 } 355 356 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d", 357 dev->data->port_id, vtpci_queue_idx); 358 359 size = RTE_ALIGN_CEIL(sizeof(*vq) + 360 vq_size * sizeof(struct vq_desc_extra), 361 RTE_CACHE_LINE_SIZE); 362 if (queue_type == VTNET_TQ) { 363 /* 364 * For each xmit packet, allocate a virtio_net_hdr 365 * and indirect ring elements 366 */ 367 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region); 368 } else if (queue_type == VTNET_CQ) { 369 /* Allocate a page for control vq command, data and status */ 370 sz_hdr_mz = PAGE_SIZE; 371 } 372 373 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE, 374 SOCKET_ID_ANY); 375 if (vq == NULL) { 376 PMD_INIT_LOG(ERR, "can not allocate vq"); 377 return -ENOMEM; 378 } 379 hw->vqs[vtpci_queue_idx] = vq; 380 381 vq->hw = hw; 382 vq->vq_queue_index = vtpci_queue_idx; 383 vq->vq_nentries = vq_size; 384 385 /* 386 * Reserve a memzone for vring elements 387 */ 388 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN); 389 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN); 390 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", 391 size, vq->vq_ring_size); 392 393 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, 394 SOCKET_ID_ANY, RTE_MEMZONE_IOVA_CONTIG, 395 VIRTIO_PCI_VRING_ALIGN); 396 if (mz == NULL) { 397 if (rte_errno == EEXIST) 398 mz = rte_memzone_lookup(vq_name); 399 if (mz == NULL) { 400 ret = -ENOMEM; 401 goto fail_q_alloc; 402 } 403 } 404 405 memset(mz->addr, 0, mz->len); 406 407 vq->vq_ring_mem = mz->iova; 408 vq->vq_ring_virt_mem = mz->addr; 409 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64, 410 (uint64_t)mz->iova); 411 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64, 412 (uint64_t)(uintptr_t)mz->addr); 413 414 virtio_init_vring(vq); 415 416 if (sz_hdr_mz) { 417 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr", 418 dev->data->port_id, vtpci_queue_idx); 419 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz, 420 SOCKET_ID_ANY, RTE_MEMZONE_IOVA_CONTIG, 421 RTE_CACHE_LINE_SIZE); 422 if (hdr_mz == NULL) { 423 if (rte_errno == EEXIST) 424 hdr_mz = rte_memzone_lookup(vq_hdr_name); 425 if (hdr_mz == NULL) { 426 ret = -ENOMEM; 427 goto fail_q_alloc; 428 } 429 } 430 } 431 432 if (queue_type == VTNET_RQ) { 433 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) * 434 sizeof(vq->sw_ring[0]); 435 436 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw, 437 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY); 438 if (!sw_ring) { 439 PMD_INIT_LOG(ERR, "can not allocate RX soft ring"); 440 ret = -ENOMEM; 441 goto fail_q_alloc; 442 } 443 444 vq->sw_ring = sw_ring; 445 rxvq = &vq->rxq; 446 rxvq->vq = vq; 447 rxvq->port_id = dev->data->port_id; 448 rxvq->mz = mz; 449 } else if (queue_type == VTNET_TQ) { 450 txvq = &vq->txq; 451 txvq->vq = vq; 452 txvq->port_id = dev->data->port_id; 453 txvq->mz = mz; 454 txvq->virtio_net_hdr_mz = hdr_mz; 455 txvq->virtio_net_hdr_mem = hdr_mz->iova; 456 } else if (queue_type == VTNET_CQ) { 457 cvq = &vq->cq; 458 cvq->vq = vq; 459 cvq->mz = mz; 460 cvq->virtio_net_hdr_mz = hdr_mz; 461 cvq->virtio_net_hdr_mem = hdr_mz->iova; 462 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE); 463 464 hw->cvq = cvq; 465 } 466 467 /* For virtio_user case (that is when hw->dev is NULL), we use 468 * virtual address. And we need properly set _offset_, please see 469 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information. 470 */ 471 if (!hw->virtio_user_dev) 472 vq->offset = offsetof(struct rte_mbuf, buf_iova); 473 else { 474 vq->vq_ring_mem = (uintptr_t)mz->addr; 475 vq->offset = offsetof(struct rte_mbuf, buf_addr); 476 if (queue_type == VTNET_TQ) 477 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 478 else if (queue_type == VTNET_CQ) 479 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 480 } 481 482 if (queue_type == VTNET_TQ) { 483 struct virtio_tx_region *txr; 484 unsigned int i; 485 486 txr = hdr_mz->addr; 487 memset(txr, 0, vq_size * sizeof(*txr)); 488 for (i = 0; i < vq_size; i++) { 489 struct vring_desc *start_dp = txr[i].tx_indir; 490 491 vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir)); 492 493 /* first indirect descriptor is always the tx header */ 494 start_dp->addr = txvq->virtio_net_hdr_mem 495 + i * sizeof(*txr) 496 + offsetof(struct virtio_tx_region, tx_hdr); 497 498 start_dp->len = hw->vtnet_hdr_size; 499 start_dp->flags = VRING_DESC_F_NEXT; 500 } 501 } 502 503 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) { 504 PMD_INIT_LOG(ERR, "setup_queue failed"); 505 return -EINVAL; 506 } 507 508 return 0; 509 510 fail_q_alloc: 511 rte_free(sw_ring); 512 rte_memzone_free(hdr_mz); 513 rte_memzone_free(mz); 514 rte_free(vq); 515 516 return ret; 517 } 518 519 static void 520 virtio_free_queues(struct virtio_hw *hw) 521 { 522 uint16_t nr_vq = virtio_get_nr_vq(hw); 523 struct virtqueue *vq; 524 int queue_type; 525 uint16_t i; 526 527 if (hw->vqs == NULL) 528 return; 529 530 for (i = 0; i < nr_vq; i++) { 531 vq = hw->vqs[i]; 532 if (!vq) 533 continue; 534 535 queue_type = virtio_get_queue_type(hw, i); 536 if (queue_type == VTNET_RQ) { 537 rte_free(vq->sw_ring); 538 rte_memzone_free(vq->rxq.mz); 539 } else if (queue_type == VTNET_TQ) { 540 rte_memzone_free(vq->txq.mz); 541 rte_memzone_free(vq->txq.virtio_net_hdr_mz); 542 } else { 543 rte_memzone_free(vq->cq.mz); 544 rte_memzone_free(vq->cq.virtio_net_hdr_mz); 545 } 546 547 rte_free(vq); 548 hw->vqs[i] = NULL; 549 } 550 551 rte_free(hw->vqs); 552 hw->vqs = NULL; 553 } 554 555 static int 556 virtio_alloc_queues(struct rte_eth_dev *dev) 557 { 558 struct virtio_hw *hw = dev->data->dev_private; 559 uint16_t nr_vq = virtio_get_nr_vq(hw); 560 uint16_t i; 561 int ret; 562 563 hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0); 564 if (!hw->vqs) { 565 PMD_INIT_LOG(ERR, "failed to allocate vqs"); 566 return -ENOMEM; 567 } 568 569 for (i = 0; i < nr_vq; i++) { 570 ret = virtio_init_queue(dev, i); 571 if (ret < 0) { 572 virtio_free_queues(hw); 573 return ret; 574 } 575 } 576 577 return 0; 578 } 579 580 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev); 581 582 static void 583 virtio_dev_close(struct rte_eth_dev *dev) 584 { 585 struct virtio_hw *hw = dev->data->dev_private; 586 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; 587 588 PMD_INIT_LOG(DEBUG, "virtio_dev_close"); 589 590 if (!hw->opened) 591 return; 592 hw->opened = false; 593 594 /* reset the NIC */ 595 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 596 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR); 597 if (intr_conf->rxq) 598 virtio_queues_unbind_intr(dev); 599 600 if (intr_conf->lsc || intr_conf->rxq) { 601 virtio_intr_disable(dev); 602 rte_intr_efd_disable(dev->intr_handle); 603 rte_free(dev->intr_handle->intr_vec); 604 dev->intr_handle->intr_vec = NULL; 605 } 606 607 vtpci_reset(hw); 608 virtio_dev_free_mbufs(dev); 609 virtio_free_queues(hw); 610 } 611 612 static void 613 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev) 614 { 615 struct virtio_hw *hw = dev->data->dev_private; 616 struct virtio_pmd_ctrl ctrl; 617 int dlen[1]; 618 int ret; 619 620 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 621 PMD_INIT_LOG(INFO, "host does not support rx control"); 622 return; 623 } 624 625 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 626 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 627 ctrl.data[0] = 1; 628 dlen[0] = 1; 629 630 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 631 if (ret) 632 PMD_INIT_LOG(ERR, "Failed to enable promisc"); 633 } 634 635 static void 636 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev) 637 { 638 struct virtio_hw *hw = dev->data->dev_private; 639 struct virtio_pmd_ctrl ctrl; 640 int dlen[1]; 641 int ret; 642 643 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 644 PMD_INIT_LOG(INFO, "host does not support rx control"); 645 return; 646 } 647 648 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 649 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 650 ctrl.data[0] = 0; 651 dlen[0] = 1; 652 653 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 654 if (ret) 655 PMD_INIT_LOG(ERR, "Failed to disable promisc"); 656 } 657 658 static void 659 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev) 660 { 661 struct virtio_hw *hw = dev->data->dev_private; 662 struct virtio_pmd_ctrl ctrl; 663 int dlen[1]; 664 int ret; 665 666 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 667 PMD_INIT_LOG(INFO, "host does not support rx control"); 668 return; 669 } 670 671 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 672 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 673 ctrl.data[0] = 1; 674 dlen[0] = 1; 675 676 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 677 if (ret) 678 PMD_INIT_LOG(ERR, "Failed to enable allmulticast"); 679 } 680 681 static void 682 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev) 683 { 684 struct virtio_hw *hw = dev->data->dev_private; 685 struct virtio_pmd_ctrl ctrl; 686 int dlen[1]; 687 int ret; 688 689 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 690 PMD_INIT_LOG(INFO, "host does not support rx control"); 691 return; 692 } 693 694 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 695 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 696 ctrl.data[0] = 0; 697 dlen[0] = 1; 698 699 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 700 if (ret) 701 PMD_INIT_LOG(ERR, "Failed to disable allmulticast"); 702 } 703 704 #define VLAN_TAG_LEN 4 /* 802.3ac tag (not DMA'd) */ 705 static int 706 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) 707 { 708 struct virtio_hw *hw = dev->data->dev_private; 709 uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN + 710 hw->vtnet_hdr_size; 711 uint32_t frame_size = mtu + ether_hdr_len; 712 uint32_t max_frame_size = hw->max_mtu + ether_hdr_len; 713 714 max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN); 715 716 if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) { 717 PMD_INIT_LOG(ERR, "MTU should be between %d and %d", 718 ETHER_MIN_MTU, max_frame_size - ether_hdr_len); 719 return -EINVAL; 720 } 721 return 0; 722 } 723 724 static int 725 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id) 726 { 727 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; 728 struct virtqueue *vq = rxvq->vq; 729 730 virtqueue_enable_intr(vq); 731 virtio_mb(); 732 return 0; 733 } 734 735 static int 736 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id) 737 { 738 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; 739 struct virtqueue *vq = rxvq->vq; 740 741 virtqueue_disable_intr(vq); 742 return 0; 743 } 744 745 /* 746 * dev_ops for virtio, bare necessities for basic operation 747 */ 748 static const struct eth_dev_ops virtio_eth_dev_ops = { 749 .dev_configure = virtio_dev_configure, 750 .dev_start = virtio_dev_start, 751 .dev_stop = virtio_dev_stop, 752 .dev_close = virtio_dev_close, 753 .promiscuous_enable = virtio_dev_promiscuous_enable, 754 .promiscuous_disable = virtio_dev_promiscuous_disable, 755 .allmulticast_enable = virtio_dev_allmulticast_enable, 756 .allmulticast_disable = virtio_dev_allmulticast_disable, 757 .mtu_set = virtio_mtu_set, 758 .dev_infos_get = virtio_dev_info_get, 759 .stats_get = virtio_dev_stats_get, 760 .xstats_get = virtio_dev_xstats_get, 761 .xstats_get_names = virtio_dev_xstats_get_names, 762 .stats_reset = virtio_dev_stats_reset, 763 .xstats_reset = virtio_dev_stats_reset, 764 .link_update = virtio_dev_link_update, 765 .vlan_offload_set = virtio_dev_vlan_offload_set, 766 .rx_queue_setup = virtio_dev_rx_queue_setup, 767 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable, 768 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable, 769 .rx_queue_release = virtio_dev_queue_release, 770 .rx_descriptor_done = virtio_dev_rx_queue_done, 771 .tx_queue_setup = virtio_dev_tx_queue_setup, 772 .tx_queue_release = virtio_dev_queue_release, 773 /* collect stats per queue */ 774 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set, 775 .vlan_filter_set = virtio_vlan_filter_set, 776 .mac_addr_add = virtio_mac_addr_add, 777 .mac_addr_remove = virtio_mac_addr_remove, 778 .mac_addr_set = virtio_mac_addr_set, 779 }; 780 781 /* 782 * dev_ops for virtio-user in secondary processes, as we just have 783 * some limited supports currently. 784 */ 785 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = { 786 .dev_infos_get = virtio_dev_info_get, 787 .stats_get = virtio_dev_stats_get, 788 .xstats_get = virtio_dev_xstats_get, 789 .xstats_get_names = virtio_dev_xstats_get_names, 790 .stats_reset = virtio_dev_stats_reset, 791 .xstats_reset = virtio_dev_stats_reset, 792 /* collect stats per queue */ 793 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set, 794 }; 795 796 static void 797 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 798 { 799 unsigned i; 800 801 for (i = 0; i < dev->data->nb_tx_queues; i++) { 802 const struct virtnet_tx *txvq = dev->data->tx_queues[i]; 803 if (txvq == NULL) 804 continue; 805 806 stats->opackets += txvq->stats.packets; 807 stats->obytes += txvq->stats.bytes; 808 stats->oerrors += txvq->stats.errors; 809 810 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 811 stats->q_opackets[i] = txvq->stats.packets; 812 stats->q_obytes[i] = txvq->stats.bytes; 813 } 814 } 815 816 for (i = 0; i < dev->data->nb_rx_queues; i++) { 817 const struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 818 if (rxvq == NULL) 819 continue; 820 821 stats->ipackets += rxvq->stats.packets; 822 stats->ibytes += rxvq->stats.bytes; 823 stats->ierrors += rxvq->stats.errors; 824 825 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 826 stats->q_ipackets[i] = rxvq->stats.packets; 827 stats->q_ibytes[i] = rxvq->stats.bytes; 828 } 829 } 830 831 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed; 832 } 833 834 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev, 835 struct rte_eth_xstat_name *xstats_names, 836 __rte_unused unsigned limit) 837 { 838 unsigned i; 839 unsigned count = 0; 840 unsigned t; 841 842 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 843 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 844 845 if (xstats_names != NULL) { 846 /* Note: limit checked in rte_eth_xstats_names() */ 847 848 for (i = 0; i < dev->data->nb_rx_queues; i++) { 849 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 850 if (rxvq == NULL) 851 continue; 852 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 853 snprintf(xstats_names[count].name, 854 sizeof(xstats_names[count].name), 855 "rx_q%u_%s", i, 856 rte_virtio_rxq_stat_strings[t].name); 857 count++; 858 } 859 } 860 861 for (i = 0; i < dev->data->nb_tx_queues; i++) { 862 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 863 if (txvq == NULL) 864 continue; 865 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 866 snprintf(xstats_names[count].name, 867 sizeof(xstats_names[count].name), 868 "tx_q%u_%s", i, 869 rte_virtio_txq_stat_strings[t].name); 870 count++; 871 } 872 } 873 return count; 874 } 875 return nstats; 876 } 877 878 static int 879 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats, 880 unsigned n) 881 { 882 unsigned i; 883 unsigned count = 0; 884 885 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 886 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 887 888 if (n < nstats) 889 return nstats; 890 891 for (i = 0; i < dev->data->nb_rx_queues; i++) { 892 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 893 894 if (rxvq == NULL) 895 continue; 896 897 unsigned t; 898 899 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 900 xstats[count].value = *(uint64_t *)(((char *)rxvq) + 901 rte_virtio_rxq_stat_strings[t].offset); 902 xstats[count].id = count; 903 count++; 904 } 905 } 906 907 for (i = 0; i < dev->data->nb_tx_queues; i++) { 908 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 909 910 if (txvq == NULL) 911 continue; 912 913 unsigned t; 914 915 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 916 xstats[count].value = *(uint64_t *)(((char *)txvq) + 917 rte_virtio_txq_stat_strings[t].offset); 918 xstats[count].id = count; 919 count++; 920 } 921 } 922 923 return count; 924 } 925 926 static int 927 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 928 { 929 virtio_update_stats(dev, stats); 930 931 return 0; 932 } 933 934 static void 935 virtio_dev_stats_reset(struct rte_eth_dev *dev) 936 { 937 unsigned int i; 938 939 for (i = 0; i < dev->data->nb_tx_queues; i++) { 940 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 941 if (txvq == NULL) 942 continue; 943 944 txvq->stats.packets = 0; 945 txvq->stats.bytes = 0; 946 txvq->stats.errors = 0; 947 txvq->stats.multicast = 0; 948 txvq->stats.broadcast = 0; 949 memset(txvq->stats.size_bins, 0, 950 sizeof(txvq->stats.size_bins[0]) * 8); 951 } 952 953 for (i = 0; i < dev->data->nb_rx_queues; i++) { 954 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 955 if (rxvq == NULL) 956 continue; 957 958 rxvq->stats.packets = 0; 959 rxvq->stats.bytes = 0; 960 rxvq->stats.errors = 0; 961 rxvq->stats.multicast = 0; 962 rxvq->stats.broadcast = 0; 963 memset(rxvq->stats.size_bins, 0, 964 sizeof(rxvq->stats.size_bins[0]) * 8); 965 } 966 } 967 968 static void 969 virtio_set_hwaddr(struct virtio_hw *hw) 970 { 971 vtpci_write_dev_config(hw, 972 offsetof(struct virtio_net_config, mac), 973 &hw->mac_addr, ETHER_ADDR_LEN); 974 } 975 976 static void 977 virtio_get_hwaddr(struct virtio_hw *hw) 978 { 979 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) { 980 vtpci_read_dev_config(hw, 981 offsetof(struct virtio_net_config, mac), 982 &hw->mac_addr, ETHER_ADDR_LEN); 983 } else { 984 eth_random_addr(&hw->mac_addr[0]); 985 virtio_set_hwaddr(hw); 986 } 987 } 988 989 static int 990 virtio_mac_table_set(struct virtio_hw *hw, 991 const struct virtio_net_ctrl_mac *uc, 992 const struct virtio_net_ctrl_mac *mc) 993 { 994 struct virtio_pmd_ctrl ctrl; 995 int err, len[2]; 996 997 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 998 PMD_DRV_LOG(INFO, "host does not support mac table"); 999 return -1; 1000 } 1001 1002 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1003 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 1004 1005 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries); 1006 memcpy(ctrl.data, uc, len[0]); 1007 1008 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries); 1009 memcpy(ctrl.data + len[0], mc, len[1]); 1010 1011 err = virtio_send_command(hw->cvq, &ctrl, len, 2); 1012 if (err != 0) 1013 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err); 1014 return err; 1015 } 1016 1017 static int 1018 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr, 1019 uint32_t index, uint32_t vmdq __rte_unused) 1020 { 1021 struct virtio_hw *hw = dev->data->dev_private; 1022 const struct ether_addr *addrs = dev->data->mac_addrs; 1023 unsigned int i; 1024 struct virtio_net_ctrl_mac *uc, *mc; 1025 1026 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1027 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1028 return -EINVAL; 1029 } 1030 1031 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1032 uc->entries = 0; 1033 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1034 mc->entries = 0; 1035 1036 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1037 const struct ether_addr *addr 1038 = (i == index) ? mac_addr : addrs + i; 1039 struct virtio_net_ctrl_mac *tbl 1040 = is_multicast_ether_addr(addr) ? mc : uc; 1041 1042 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN); 1043 } 1044 1045 return virtio_mac_table_set(hw, uc, mc); 1046 } 1047 1048 static void 1049 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index) 1050 { 1051 struct virtio_hw *hw = dev->data->dev_private; 1052 struct ether_addr *addrs = dev->data->mac_addrs; 1053 struct virtio_net_ctrl_mac *uc, *mc; 1054 unsigned int i; 1055 1056 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1057 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1058 return; 1059 } 1060 1061 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1062 uc->entries = 0; 1063 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1064 mc->entries = 0; 1065 1066 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1067 struct virtio_net_ctrl_mac *tbl; 1068 1069 if (i == index || is_zero_ether_addr(addrs + i)) 1070 continue; 1071 1072 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc; 1073 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN); 1074 } 1075 1076 virtio_mac_table_set(hw, uc, mc); 1077 } 1078 1079 static int 1080 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr) 1081 { 1082 struct virtio_hw *hw = dev->data->dev_private; 1083 1084 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN); 1085 1086 /* Use atomic update if available */ 1087 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 1088 struct virtio_pmd_ctrl ctrl; 1089 int len = ETHER_ADDR_LEN; 1090 1091 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1092 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; 1093 1094 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN); 1095 return virtio_send_command(hw->cvq, &ctrl, &len, 1); 1096 } 1097 1098 if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) 1099 return -ENOTSUP; 1100 1101 virtio_set_hwaddr(hw); 1102 return 0; 1103 } 1104 1105 static int 1106 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 1107 { 1108 struct virtio_hw *hw = dev->data->dev_private; 1109 struct virtio_pmd_ctrl ctrl; 1110 int len; 1111 1112 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) 1113 return -ENOTSUP; 1114 1115 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN; 1116 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; 1117 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id)); 1118 len = sizeof(vlan_id); 1119 1120 return virtio_send_command(hw->cvq, &ctrl, &len, 1); 1121 } 1122 1123 static int 1124 virtio_intr_enable(struct rte_eth_dev *dev) 1125 { 1126 struct virtio_hw *hw = dev->data->dev_private; 1127 1128 if (rte_intr_enable(dev->intr_handle) < 0) 1129 return -1; 1130 1131 if (!hw->virtio_user_dev) 1132 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev)); 1133 1134 return 0; 1135 } 1136 1137 static int 1138 virtio_intr_disable(struct rte_eth_dev *dev) 1139 { 1140 struct virtio_hw *hw = dev->data->dev_private; 1141 1142 if (rte_intr_disable(dev->intr_handle) < 0) 1143 return -1; 1144 1145 if (!hw->virtio_user_dev) 1146 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev)); 1147 1148 return 0; 1149 } 1150 1151 static int 1152 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features) 1153 { 1154 uint64_t host_features; 1155 1156 /* Prepare guest_features: feature that driver wants to support */ 1157 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64, 1158 req_features); 1159 1160 /* Read device(host) feature bits */ 1161 host_features = VTPCI_OPS(hw)->get_features(hw); 1162 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64, 1163 host_features); 1164 1165 /* If supported, ensure MTU value is valid before acknowledging it. */ 1166 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) { 1167 struct virtio_net_config config; 1168 1169 vtpci_read_dev_config(hw, 1170 offsetof(struct virtio_net_config, mtu), 1171 &config.mtu, sizeof(config.mtu)); 1172 1173 if (config.mtu < ETHER_MIN_MTU) 1174 req_features &= ~(1ULL << VIRTIO_NET_F_MTU); 1175 } 1176 1177 /* 1178 * Negotiate features: Subset of device feature bits are written back 1179 * guest feature bits. 1180 */ 1181 hw->guest_features = req_features; 1182 hw->guest_features = vtpci_negotiate_features(hw, host_features); 1183 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64, 1184 hw->guest_features); 1185 1186 if (hw->modern) { 1187 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) { 1188 PMD_INIT_LOG(ERR, 1189 "VIRTIO_F_VERSION_1 features is not enabled."); 1190 return -1; 1191 } 1192 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK); 1193 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) { 1194 PMD_INIT_LOG(ERR, 1195 "failed to set FEATURES_OK status!"); 1196 return -1; 1197 } 1198 } 1199 1200 hw->req_guest_features = req_features; 1201 1202 return 0; 1203 } 1204 1205 int 1206 virtio_dev_pause(struct rte_eth_dev *dev) 1207 { 1208 struct virtio_hw *hw = dev->data->dev_private; 1209 1210 rte_spinlock_lock(&hw->state_lock); 1211 1212 if (hw->started == 0) { 1213 /* Device is just stopped. */ 1214 rte_spinlock_unlock(&hw->state_lock); 1215 return -1; 1216 } 1217 hw->started = 0; 1218 /* 1219 * Prevent the worker threads from touching queues to avoid contention, 1220 * 1 ms should be enough for the ongoing Tx function to finish. 1221 */ 1222 rte_delay_ms(1); 1223 return 0; 1224 } 1225 1226 /* 1227 * Recover hw state to let the worker threads continue. 1228 */ 1229 void 1230 virtio_dev_resume(struct rte_eth_dev *dev) 1231 { 1232 struct virtio_hw *hw = dev->data->dev_private; 1233 1234 hw->started = 1; 1235 rte_spinlock_unlock(&hw->state_lock); 1236 } 1237 1238 /* 1239 * Should be called only after device is paused. 1240 */ 1241 int 1242 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts, 1243 int nb_pkts) 1244 { 1245 struct virtio_hw *hw = dev->data->dev_private; 1246 struct virtnet_tx *txvq = dev->data->tx_queues[0]; 1247 int ret; 1248 1249 hw->inject_pkts = tx_pkts; 1250 ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts); 1251 hw->inject_pkts = NULL; 1252 1253 return ret; 1254 } 1255 1256 static void 1257 virtio_notify_peers(struct rte_eth_dev *dev) 1258 { 1259 struct virtio_hw *hw = dev->data->dev_private; 1260 struct virtnet_rx *rxvq; 1261 struct rte_mbuf *rarp_mbuf; 1262 1263 if (!dev->data->rx_queues) 1264 return; 1265 1266 rxvq = dev->data->rx_queues[0]; 1267 if (!rxvq) 1268 return; 1269 1270 rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool, 1271 (struct ether_addr *)hw->mac_addr); 1272 if (rarp_mbuf == NULL) { 1273 PMD_DRV_LOG(ERR, "failed to make RARP packet."); 1274 return; 1275 } 1276 1277 /* If virtio port just stopped, no need to send RARP */ 1278 if (virtio_dev_pause(dev) < 0) { 1279 rte_pktmbuf_free(rarp_mbuf); 1280 return; 1281 } 1282 1283 virtio_inject_pkts(dev, &rarp_mbuf, 1); 1284 virtio_dev_resume(dev); 1285 } 1286 1287 static void 1288 virtio_ack_link_announce(struct rte_eth_dev *dev) 1289 { 1290 struct virtio_hw *hw = dev->data->dev_private; 1291 struct virtio_pmd_ctrl ctrl; 1292 1293 ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE; 1294 ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK; 1295 1296 virtio_send_command(hw->cvq, &ctrl, NULL, 0); 1297 } 1298 1299 /* 1300 * Process virtio config changed interrupt. Call the callback 1301 * if link state changed, generate gratuitous RARP packet if 1302 * the status indicates an ANNOUNCE. 1303 */ 1304 void 1305 virtio_interrupt_handler(void *param) 1306 { 1307 struct rte_eth_dev *dev = param; 1308 struct virtio_hw *hw = dev->data->dev_private; 1309 uint8_t isr; 1310 uint16_t status; 1311 1312 /* Read interrupt status which clears interrupt */ 1313 isr = vtpci_isr(hw); 1314 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr); 1315 1316 if (virtio_intr_enable(dev) < 0) 1317 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1318 1319 if (isr & VIRTIO_PCI_ISR_CONFIG) { 1320 if (virtio_dev_link_update(dev, 0) == 0) 1321 _rte_eth_dev_callback_process(dev, 1322 RTE_ETH_EVENT_INTR_LSC, 1323 NULL); 1324 1325 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1326 vtpci_read_dev_config(hw, 1327 offsetof(struct virtio_net_config, status), 1328 &status, sizeof(status)); 1329 if (status & VIRTIO_NET_S_ANNOUNCE) { 1330 virtio_notify_peers(dev); 1331 if (hw->cvq) 1332 virtio_ack_link_announce(dev); 1333 } 1334 } 1335 } 1336 } 1337 1338 /* set rx and tx handlers according to what is supported */ 1339 static void 1340 set_rxtx_funcs(struct rte_eth_dev *eth_dev) 1341 { 1342 struct virtio_hw *hw = eth_dev->data->dev_private; 1343 1344 if (hw->use_simple_rx) { 1345 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u", 1346 eth_dev->data->port_id); 1347 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec; 1348 } else if (hw->use_inorder_rx) { 1349 PMD_INIT_LOG(INFO, 1350 "virtio: using inorder mergeable buffer Rx path on port %u", 1351 eth_dev->data->port_id); 1352 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts_inorder; 1353 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1354 PMD_INIT_LOG(INFO, 1355 "virtio: using mergeable buffer Rx path on port %u", 1356 eth_dev->data->port_id); 1357 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts; 1358 } else { 1359 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u", 1360 eth_dev->data->port_id); 1361 eth_dev->rx_pkt_burst = &virtio_recv_pkts; 1362 } 1363 1364 if (hw->use_inorder_tx) { 1365 PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u", 1366 eth_dev->data->port_id); 1367 eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder; 1368 } else { 1369 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u", 1370 eth_dev->data->port_id); 1371 eth_dev->tx_pkt_burst = virtio_xmit_pkts; 1372 } 1373 } 1374 1375 /* Only support 1:1 queue/interrupt mapping so far. 1376 * TODO: support n:1 queue/interrupt mapping when there are limited number of 1377 * interrupt vectors (<N+1). 1378 */ 1379 static int 1380 virtio_queues_bind_intr(struct rte_eth_dev *dev) 1381 { 1382 uint32_t i; 1383 struct virtio_hw *hw = dev->data->dev_private; 1384 1385 PMD_INIT_LOG(INFO, "queue/interrupt binding"); 1386 for (i = 0; i < dev->data->nb_rx_queues; ++i) { 1387 dev->intr_handle->intr_vec[i] = i + 1; 1388 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) == 1389 VIRTIO_MSI_NO_VECTOR) { 1390 PMD_DRV_LOG(ERR, "failed to set queue vector"); 1391 return -EBUSY; 1392 } 1393 } 1394 1395 return 0; 1396 } 1397 1398 static void 1399 virtio_queues_unbind_intr(struct rte_eth_dev *dev) 1400 { 1401 uint32_t i; 1402 struct virtio_hw *hw = dev->data->dev_private; 1403 1404 PMD_INIT_LOG(INFO, "queue/interrupt unbinding"); 1405 for (i = 0; i < dev->data->nb_rx_queues; ++i) 1406 VTPCI_OPS(hw)->set_queue_irq(hw, 1407 hw->vqs[i * VTNET_CQ], 1408 VIRTIO_MSI_NO_VECTOR); 1409 } 1410 1411 static int 1412 virtio_configure_intr(struct rte_eth_dev *dev) 1413 { 1414 struct virtio_hw *hw = dev->data->dev_private; 1415 1416 if (!rte_intr_cap_multiple(dev->intr_handle)) { 1417 PMD_INIT_LOG(ERR, "Multiple intr vector not supported"); 1418 return -ENOTSUP; 1419 } 1420 1421 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) { 1422 PMD_INIT_LOG(ERR, "Fail to create eventfd"); 1423 return -1; 1424 } 1425 1426 if (!dev->intr_handle->intr_vec) { 1427 dev->intr_handle->intr_vec = 1428 rte_zmalloc("intr_vec", 1429 hw->max_queue_pairs * sizeof(int), 0); 1430 if (!dev->intr_handle->intr_vec) { 1431 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors", 1432 hw->max_queue_pairs); 1433 return -ENOMEM; 1434 } 1435 } 1436 1437 /* Re-register callback to update max_intr */ 1438 rte_intr_callback_unregister(dev->intr_handle, 1439 virtio_interrupt_handler, 1440 dev); 1441 rte_intr_callback_register(dev->intr_handle, 1442 virtio_interrupt_handler, 1443 dev); 1444 1445 /* DO NOT try to remove this! This function will enable msix, or QEMU 1446 * will encounter SIGSEGV when DRIVER_OK is sent. 1447 * And for legacy devices, this should be done before queue/vec binding 1448 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR 1449 * (22) will be ignored. 1450 */ 1451 if (virtio_intr_enable(dev) < 0) { 1452 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1453 return -1; 1454 } 1455 1456 if (virtio_queues_bind_intr(dev) < 0) { 1457 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt"); 1458 return -1; 1459 } 1460 1461 return 0; 1462 } 1463 1464 /* reset device and renegotiate features if needed */ 1465 static int 1466 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) 1467 { 1468 struct virtio_hw *hw = eth_dev->data->dev_private; 1469 struct virtio_net_config *config; 1470 struct virtio_net_config local_config; 1471 struct rte_pci_device *pci_dev = NULL; 1472 int ret; 1473 1474 /* Reset the device although not necessary at startup */ 1475 vtpci_reset(hw); 1476 1477 if (hw->vqs) { 1478 virtio_dev_free_mbufs(eth_dev); 1479 virtio_free_queues(hw); 1480 } 1481 1482 /* Tell the host we've noticed this device. */ 1483 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK); 1484 1485 /* Tell the host we've known how to drive the device. */ 1486 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER); 1487 if (virtio_negotiate_features(hw, req_features) < 0) 1488 return -1; 1489 1490 if (!hw->virtio_user_dev) { 1491 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev); 1492 rte_eth_copy_pci_info(eth_dev, pci_dev); 1493 } 1494 1495 /* If host does not support both status and MSI-X then disable LSC */ 1496 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && 1497 hw->use_msix != VIRTIO_MSIX_NONE) 1498 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC; 1499 else 1500 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC; 1501 1502 /* Setting up rx_header size for the device */ 1503 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || 1504 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) 1505 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); 1506 else 1507 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr); 1508 1509 /* Copy the permanent MAC address to: virtio_hw */ 1510 virtio_get_hwaddr(hw); 1511 ether_addr_copy((struct ether_addr *) hw->mac_addr, 1512 ð_dev->data->mac_addrs[0]); 1513 PMD_INIT_LOG(DEBUG, 1514 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1515 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2], 1516 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]); 1517 1518 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) { 1519 config = &local_config; 1520 1521 vtpci_read_dev_config(hw, 1522 offsetof(struct virtio_net_config, mac), 1523 &config->mac, sizeof(config->mac)); 1524 1525 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1526 vtpci_read_dev_config(hw, 1527 offsetof(struct virtio_net_config, status), 1528 &config->status, sizeof(config->status)); 1529 } else { 1530 PMD_INIT_LOG(DEBUG, 1531 "VIRTIO_NET_F_STATUS is not supported"); 1532 config->status = 0; 1533 } 1534 1535 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) { 1536 vtpci_read_dev_config(hw, 1537 offsetof(struct virtio_net_config, max_virtqueue_pairs), 1538 &config->max_virtqueue_pairs, 1539 sizeof(config->max_virtqueue_pairs)); 1540 } else { 1541 PMD_INIT_LOG(DEBUG, 1542 "VIRTIO_NET_F_MQ is not supported"); 1543 config->max_virtqueue_pairs = 1; 1544 } 1545 1546 hw->max_queue_pairs = config->max_virtqueue_pairs; 1547 1548 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) { 1549 vtpci_read_dev_config(hw, 1550 offsetof(struct virtio_net_config, mtu), 1551 &config->mtu, 1552 sizeof(config->mtu)); 1553 1554 /* 1555 * MTU value has already been checked at negotiation 1556 * time, but check again in case it has changed since 1557 * then, which should not happen. 1558 */ 1559 if (config->mtu < ETHER_MIN_MTU) { 1560 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)", 1561 config->mtu); 1562 return -1; 1563 } 1564 1565 hw->max_mtu = config->mtu; 1566 /* Set initial MTU to maximum one supported by vhost */ 1567 eth_dev->data->mtu = config->mtu; 1568 1569 } else { 1570 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN - 1571 VLAN_TAG_LEN - hw->vtnet_hdr_size; 1572 } 1573 1574 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d", 1575 config->max_virtqueue_pairs); 1576 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status); 1577 PMD_INIT_LOG(DEBUG, 1578 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1579 config->mac[0], config->mac[1], 1580 config->mac[2], config->mac[3], 1581 config->mac[4], config->mac[5]); 1582 } else { 1583 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1"); 1584 hw->max_queue_pairs = 1; 1585 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN - 1586 VLAN_TAG_LEN - hw->vtnet_hdr_size; 1587 } 1588 1589 ret = virtio_alloc_queues(eth_dev); 1590 if (ret < 0) 1591 return ret; 1592 1593 if (eth_dev->data->dev_conf.intr_conf.rxq) { 1594 if (virtio_configure_intr(eth_dev) < 0) { 1595 PMD_INIT_LOG(ERR, "failed to configure interrupt"); 1596 return -1; 1597 } 1598 } 1599 1600 vtpci_reinit_complete(hw); 1601 1602 if (pci_dev) 1603 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 1604 eth_dev->data->port_id, pci_dev->id.vendor_id, 1605 pci_dev->id.device_id); 1606 1607 return 0; 1608 } 1609 1610 /* 1611 * Remap the PCI device again (IO port map for legacy device and 1612 * memory map for modern device), so that the secondary process 1613 * could have the PCI initiated correctly. 1614 */ 1615 static int 1616 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw) 1617 { 1618 if (hw->modern) { 1619 /* 1620 * We don't have to re-parse the PCI config space, since 1621 * rte_pci_map_device() makes sure the mapped address 1622 * in secondary process would equal to the one mapped in 1623 * the primary process: error will be returned if that 1624 * requirement is not met. 1625 * 1626 * That said, we could simply reuse all cap pointers 1627 * (such as dev_cfg, common_cfg, etc.) parsed from the 1628 * primary process, which is stored in shared memory. 1629 */ 1630 if (rte_pci_map_device(pci_dev)) { 1631 PMD_INIT_LOG(DEBUG, "failed to map pci device!"); 1632 return -1; 1633 } 1634 } else { 1635 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0) 1636 return -1; 1637 } 1638 1639 return 0; 1640 } 1641 1642 static void 1643 virtio_set_vtpci_ops(struct virtio_hw *hw) 1644 { 1645 #ifdef RTE_VIRTIO_USER 1646 if (hw->virtio_user_dev) 1647 VTPCI_OPS(hw) = &virtio_user_ops; 1648 else 1649 #endif 1650 if (hw->modern) 1651 VTPCI_OPS(hw) = &modern_ops; 1652 else 1653 VTPCI_OPS(hw) = &legacy_ops; 1654 } 1655 1656 /* 1657 * This function is based on probe() function in virtio_pci.c 1658 * It returns 0 on success. 1659 */ 1660 int 1661 eth_virtio_dev_init(struct rte_eth_dev *eth_dev) 1662 { 1663 struct virtio_hw *hw = eth_dev->data->dev_private; 1664 int ret; 1665 1666 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf)); 1667 1668 eth_dev->dev_ops = &virtio_eth_dev_ops; 1669 1670 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1671 if (!hw->virtio_user_dev) { 1672 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1673 if (ret) 1674 return ret; 1675 } 1676 1677 virtio_set_vtpci_ops(hw); 1678 set_rxtx_funcs(eth_dev); 1679 1680 return 0; 1681 } 1682 1683 /* Allocate memory for storing MAC addresses */ 1684 eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0); 1685 if (eth_dev->data->mac_addrs == NULL) { 1686 PMD_INIT_LOG(ERR, 1687 "Failed to allocate %d bytes needed to store MAC addresses", 1688 VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN); 1689 return -ENOMEM; 1690 } 1691 1692 hw->port_id = eth_dev->data->port_id; 1693 /* For virtio_user case the hw->virtio_user_dev is populated by 1694 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called. 1695 */ 1696 if (!hw->virtio_user_dev) { 1697 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1698 if (ret) 1699 goto out; 1700 } 1701 1702 /* reset device and negotiate default features */ 1703 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES); 1704 if (ret < 0) 1705 goto out; 1706 1707 return 0; 1708 1709 out: 1710 rte_free(eth_dev->data->mac_addrs); 1711 eth_dev->data->mac_addrs = NULL; 1712 return ret; 1713 } 1714 1715 static int 1716 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev) 1717 { 1718 PMD_INIT_FUNC_TRACE(); 1719 1720 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 1721 return 0; 1722 1723 virtio_dev_stop(eth_dev); 1724 virtio_dev_close(eth_dev); 1725 1726 eth_dev->dev_ops = NULL; 1727 eth_dev->tx_pkt_burst = NULL; 1728 eth_dev->rx_pkt_burst = NULL; 1729 1730 if (eth_dev->device) 1731 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev)); 1732 1733 PMD_INIT_LOG(DEBUG, "dev_uninit completed"); 1734 1735 return 0; 1736 } 1737 1738 static int vdpa_check_handler(__rte_unused const char *key, 1739 const char *value, __rte_unused void *opaque) 1740 { 1741 if (strcmp(value, "1")) 1742 return -1; 1743 1744 return 0; 1745 } 1746 1747 static int 1748 vdpa_mode_selected(struct rte_devargs *devargs) 1749 { 1750 struct rte_kvargs *kvlist; 1751 const char *key = "vdpa"; 1752 int ret = 0; 1753 1754 if (devargs == NULL) 1755 return 0; 1756 1757 kvlist = rte_kvargs_parse(devargs->args, NULL); 1758 if (kvlist == NULL) 1759 return 0; 1760 1761 if (!rte_kvargs_count(kvlist, key)) 1762 goto exit; 1763 1764 /* vdpa mode selected when there's a key-value pair: vdpa=1 */ 1765 if (rte_kvargs_process(kvlist, key, 1766 vdpa_check_handler, NULL) < 0) { 1767 goto exit; 1768 } 1769 ret = 1; 1770 1771 exit: 1772 rte_kvargs_free(kvlist); 1773 return ret; 1774 } 1775 1776 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 1777 struct rte_pci_device *pci_dev) 1778 { 1779 if (rte_eal_iopl_init() != 0) { 1780 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD"); 1781 return 1; 1782 } 1783 1784 /* virtio pmd skips probe if device needs to work in vdpa mode */ 1785 if (vdpa_mode_selected(pci_dev->device.devargs)) 1786 return 1; 1787 1788 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw), 1789 eth_virtio_dev_init); 1790 } 1791 1792 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev) 1793 { 1794 return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit); 1795 } 1796 1797 static struct rte_pci_driver rte_virtio_pmd = { 1798 .driver = { 1799 .name = "net_virtio", 1800 }, 1801 .id_table = pci_id_virtio_map, 1802 .drv_flags = 0, 1803 .probe = eth_virtio_pci_probe, 1804 .remove = eth_virtio_pci_remove, 1805 }; 1806 1807 RTE_INIT(rte_virtio_pmd_init) 1808 { 1809 rte_eal_iopl_init(); 1810 rte_pci_register(&rte_virtio_pmd); 1811 } 1812 1813 static bool 1814 rx_offload_enabled(struct virtio_hw *hw) 1815 { 1816 return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) || 1817 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) || 1818 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6); 1819 } 1820 1821 static bool 1822 tx_offload_enabled(struct virtio_hw *hw) 1823 { 1824 return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) || 1825 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) || 1826 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6); 1827 } 1828 1829 /* 1830 * Configure virtio device 1831 * It returns 0 on success. 1832 */ 1833 static int 1834 virtio_dev_configure(struct rte_eth_dev *dev) 1835 { 1836 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 1837 const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode; 1838 struct virtio_hw *hw = dev->data->dev_private; 1839 uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN + 1840 hw->vtnet_hdr_size; 1841 uint64_t rx_offloads = rxmode->offloads; 1842 uint64_t tx_offloads = txmode->offloads; 1843 uint64_t req_features; 1844 int ret; 1845 1846 PMD_INIT_LOG(DEBUG, "configure"); 1847 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES; 1848 1849 if (dev->data->dev_conf.intr_conf.rxq) { 1850 ret = virtio_init_device(dev, hw->req_guest_features); 1851 if (ret < 0) 1852 return ret; 1853 } 1854 1855 if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len) 1856 req_features &= ~(1ULL << VIRTIO_NET_F_MTU); 1857 1858 if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM | 1859 DEV_RX_OFFLOAD_TCP_CKSUM)) 1860 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM); 1861 1862 if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) 1863 req_features |= 1864 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 1865 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 1866 1867 if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM | 1868 DEV_TX_OFFLOAD_TCP_CKSUM)) 1869 req_features |= (1ULL << VIRTIO_NET_F_CSUM); 1870 1871 if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO) 1872 req_features |= 1873 (1ULL << VIRTIO_NET_F_HOST_TSO4) | 1874 (1ULL << VIRTIO_NET_F_HOST_TSO6); 1875 1876 /* if request features changed, reinit the device */ 1877 if (req_features != hw->req_guest_features) { 1878 ret = virtio_init_device(dev, req_features); 1879 if (ret < 0) 1880 return ret; 1881 } 1882 1883 if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM | 1884 DEV_RX_OFFLOAD_TCP_CKSUM)) && 1885 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) { 1886 PMD_DRV_LOG(ERR, 1887 "rx checksum not available on this host"); 1888 return -ENOTSUP; 1889 } 1890 1891 if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) && 1892 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) || 1893 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) { 1894 PMD_DRV_LOG(ERR, 1895 "Large Receive Offload not available on this host"); 1896 return -ENOTSUP; 1897 } 1898 1899 /* start control queue */ 1900 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 1901 virtio_dev_cq_start(dev); 1902 1903 if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP) 1904 hw->vlan_strip = 1; 1905 1906 if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER) 1907 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 1908 PMD_DRV_LOG(ERR, 1909 "vlan filtering not available on this host"); 1910 return -ENOTSUP; 1911 } 1912 1913 hw->has_tx_offload = tx_offload_enabled(hw); 1914 hw->has_rx_offload = rx_offload_enabled(hw); 1915 1916 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1917 /* Enable vector (0) for Link State Intrerrupt */ 1918 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) == 1919 VIRTIO_MSI_NO_VECTOR) { 1920 PMD_DRV_LOG(ERR, "failed to set config vector"); 1921 return -EBUSY; 1922 } 1923 1924 rte_spinlock_init(&hw->state_lock); 1925 1926 hw->use_simple_rx = 1; 1927 1928 if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) { 1929 hw->use_inorder_tx = 1; 1930 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1931 hw->use_inorder_rx = 1; 1932 hw->use_simple_rx = 0; 1933 } else { 1934 hw->use_inorder_rx = 0; 1935 } 1936 } 1937 1938 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM 1939 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) { 1940 hw->use_simple_rx = 0; 1941 } 1942 #endif 1943 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1944 hw->use_simple_rx = 0; 1945 } 1946 1947 if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM | 1948 DEV_RX_OFFLOAD_TCP_CKSUM | 1949 DEV_RX_OFFLOAD_TCP_LRO | 1950 DEV_RX_OFFLOAD_VLAN_STRIP)) 1951 hw->use_simple_rx = 0; 1952 1953 hw->opened = true; 1954 1955 return 0; 1956 } 1957 1958 1959 static int 1960 virtio_dev_start(struct rte_eth_dev *dev) 1961 { 1962 uint16_t nb_queues, i; 1963 struct virtnet_rx *rxvq; 1964 struct virtnet_tx *txvq __rte_unused; 1965 struct virtio_hw *hw = dev->data->dev_private; 1966 int ret; 1967 1968 /* Finish the initialization of the queues */ 1969 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1970 ret = virtio_dev_rx_queue_setup_finish(dev, i); 1971 if (ret < 0) 1972 return ret; 1973 } 1974 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1975 ret = virtio_dev_tx_queue_setup_finish(dev, i); 1976 if (ret < 0) 1977 return ret; 1978 } 1979 1980 /* check if lsc interrupt feature is enabled */ 1981 if (dev->data->dev_conf.intr_conf.lsc) { 1982 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) { 1983 PMD_DRV_LOG(ERR, "link status not supported by host"); 1984 return -ENOTSUP; 1985 } 1986 } 1987 1988 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that 1989 * in device configure, but it could be unmapped when device is 1990 * stopped. 1991 */ 1992 if (dev->data->dev_conf.intr_conf.lsc || 1993 dev->data->dev_conf.intr_conf.rxq) { 1994 virtio_intr_disable(dev); 1995 1996 /* Setup interrupt callback */ 1997 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1998 rte_intr_callback_register(dev->intr_handle, 1999 virtio_interrupt_handler, 2000 dev); 2001 2002 if (virtio_intr_enable(dev) < 0) { 2003 PMD_DRV_LOG(ERR, "interrupt enable failed"); 2004 return -EIO; 2005 } 2006 } 2007 2008 /*Notify the backend 2009 *Otherwise the tap backend might already stop its queue due to fullness. 2010 *vhost backend will have no chance to be waked up 2011 */ 2012 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues); 2013 if (hw->max_queue_pairs > 1) { 2014 if (virtio_set_multiple_queues(dev, nb_queues) != 0) 2015 return -EINVAL; 2016 } 2017 2018 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues); 2019 2020 for (i = 0; i < dev->data->nb_rx_queues; i++) { 2021 rxvq = dev->data->rx_queues[i]; 2022 /* Flush the old packets */ 2023 virtqueue_rxvq_flush(rxvq->vq); 2024 virtqueue_notify(rxvq->vq); 2025 } 2026 2027 for (i = 0; i < dev->data->nb_tx_queues; i++) { 2028 txvq = dev->data->tx_queues[i]; 2029 virtqueue_notify(txvq->vq); 2030 } 2031 2032 PMD_INIT_LOG(DEBUG, "Notified backend at initialization"); 2033 2034 for (i = 0; i < dev->data->nb_rx_queues; i++) { 2035 rxvq = dev->data->rx_queues[i]; 2036 VIRTQUEUE_DUMP(rxvq->vq); 2037 } 2038 2039 for (i = 0; i < dev->data->nb_tx_queues; i++) { 2040 txvq = dev->data->tx_queues[i]; 2041 VIRTQUEUE_DUMP(txvq->vq); 2042 } 2043 2044 set_rxtx_funcs(dev); 2045 hw->started = true; 2046 2047 /* Initialize Link state */ 2048 virtio_dev_link_update(dev, 0); 2049 2050 return 0; 2051 } 2052 2053 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev) 2054 { 2055 struct virtio_hw *hw = dev->data->dev_private; 2056 uint16_t nr_vq = virtio_get_nr_vq(hw); 2057 const char *type __rte_unused; 2058 unsigned int i, mbuf_num = 0; 2059 struct virtqueue *vq; 2060 struct rte_mbuf *buf; 2061 int queue_type; 2062 2063 if (hw->vqs == NULL) 2064 return; 2065 2066 for (i = 0; i < nr_vq; i++) { 2067 vq = hw->vqs[i]; 2068 if (!vq) 2069 continue; 2070 2071 queue_type = virtio_get_queue_type(hw, i); 2072 if (queue_type == VTNET_RQ) 2073 type = "rxq"; 2074 else if (queue_type == VTNET_TQ) 2075 type = "txq"; 2076 else 2077 continue; 2078 2079 PMD_INIT_LOG(DEBUG, 2080 "Before freeing %s[%d] used and unused buf", 2081 type, i); 2082 VIRTQUEUE_DUMP(vq); 2083 2084 while ((buf = virtqueue_detach_unused(vq)) != NULL) { 2085 rte_pktmbuf_free(buf); 2086 mbuf_num++; 2087 } 2088 2089 PMD_INIT_LOG(DEBUG, 2090 "After freeing %s[%d] used and unused buf", 2091 type, i); 2092 VIRTQUEUE_DUMP(vq); 2093 } 2094 2095 PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num); 2096 } 2097 2098 /* 2099 * Stop device: disable interrupt and mark link down 2100 */ 2101 static void 2102 virtio_dev_stop(struct rte_eth_dev *dev) 2103 { 2104 struct virtio_hw *hw = dev->data->dev_private; 2105 struct rte_eth_link link; 2106 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; 2107 2108 PMD_INIT_LOG(DEBUG, "stop"); 2109 2110 rte_spinlock_lock(&hw->state_lock); 2111 if (!hw->started) 2112 goto out_unlock; 2113 hw->started = false; 2114 2115 if (intr_conf->lsc || intr_conf->rxq) { 2116 virtio_intr_disable(dev); 2117 2118 /* Reset interrupt callback */ 2119 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) { 2120 rte_intr_callback_unregister(dev->intr_handle, 2121 virtio_interrupt_handler, 2122 dev); 2123 } 2124 } 2125 2126 memset(&link, 0, sizeof(link)); 2127 rte_eth_linkstatus_set(dev, &link); 2128 out_unlock: 2129 rte_spinlock_unlock(&hw->state_lock); 2130 } 2131 2132 static int 2133 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete) 2134 { 2135 struct rte_eth_link link; 2136 uint16_t status; 2137 struct virtio_hw *hw = dev->data->dev_private; 2138 2139 memset(&link, 0, sizeof(link)); 2140 link.link_duplex = ETH_LINK_FULL_DUPLEX; 2141 link.link_speed = ETH_SPEED_NUM_10G; 2142 link.link_autoneg = ETH_LINK_FIXED; 2143 2144 if (!hw->started) { 2145 link.link_status = ETH_LINK_DOWN; 2146 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 2147 PMD_INIT_LOG(DEBUG, "Get link status from hw"); 2148 vtpci_read_dev_config(hw, 2149 offsetof(struct virtio_net_config, status), 2150 &status, sizeof(status)); 2151 if ((status & VIRTIO_NET_S_LINK_UP) == 0) { 2152 link.link_status = ETH_LINK_DOWN; 2153 PMD_INIT_LOG(DEBUG, "Port %d is down", 2154 dev->data->port_id); 2155 } else { 2156 link.link_status = ETH_LINK_UP; 2157 PMD_INIT_LOG(DEBUG, "Port %d is up", 2158 dev->data->port_id); 2159 } 2160 } else { 2161 link.link_status = ETH_LINK_UP; 2162 } 2163 2164 return rte_eth_linkstatus_set(dev, &link); 2165 } 2166 2167 static int 2168 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask) 2169 { 2170 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 2171 struct virtio_hw *hw = dev->data->dev_private; 2172 uint64_t offloads = rxmode->offloads; 2173 2174 if (mask & ETH_VLAN_FILTER_MASK) { 2175 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) && 2176 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 2177 2178 PMD_DRV_LOG(NOTICE, 2179 "vlan filtering not available on this host"); 2180 2181 return -ENOTSUP; 2182 } 2183 } 2184 2185 if (mask & ETH_VLAN_STRIP_MASK) 2186 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP); 2187 2188 return 0; 2189 } 2190 2191 static void 2192 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) 2193 { 2194 uint64_t tso_mask, host_features; 2195 struct virtio_hw *hw = dev->data->dev_private; 2196 2197 dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */ 2198 2199 dev_info->max_rx_queues = 2200 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES); 2201 dev_info->max_tx_queues = 2202 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES); 2203 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE; 2204 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN; 2205 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS; 2206 2207 host_features = VTPCI_OPS(hw)->get_features(hw); 2208 dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP; 2209 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME; 2210 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) { 2211 dev_info->rx_offload_capa |= 2212 DEV_RX_OFFLOAD_TCP_CKSUM | 2213 DEV_RX_OFFLOAD_UDP_CKSUM; 2214 } 2215 if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN)) 2216 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER; 2217 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 2218 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 2219 if ((host_features & tso_mask) == tso_mask) 2220 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO; 2221 2222 dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS | 2223 DEV_TX_OFFLOAD_VLAN_INSERT; 2224 if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) { 2225 dev_info->tx_offload_capa |= 2226 DEV_TX_OFFLOAD_UDP_CKSUM | 2227 DEV_TX_OFFLOAD_TCP_CKSUM; 2228 } 2229 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) | 2230 (1ULL << VIRTIO_NET_F_HOST_TSO6); 2231 if ((host_features & tso_mask) == tso_mask) 2232 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO; 2233 } 2234 2235 /* 2236 * It enables testpmd to collect per queue stats. 2237 */ 2238 static int 2239 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev, 2240 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx, 2241 __rte_unused uint8_t is_rx) 2242 { 2243 return 0; 2244 } 2245 2246 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__); 2247 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map); 2248 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci"); 2249 2250 RTE_INIT(virtio_init_log) 2251 { 2252 virtio_logtype_init = rte_log_register("pmd.net.virtio.init"); 2253 if (virtio_logtype_init >= 0) 2254 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE); 2255 virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver"); 2256 if (virtio_logtype_driver >= 0) 2257 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE); 2258 } 2259