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_atomic.h> 18 #include <rte_branch_prediction.h> 19 #include <rte_pci.h> 20 #include <rte_bus_pci.h> 21 #include <rte_ether.h> 22 #include <rte_ip.h> 23 #include <rte_arp.h> 24 #include <rte_common.h> 25 #include <rte_errno.h> 26 #include <rte_cpuflags.h> 27 28 #include <rte_memory.h> 29 #include <rte_eal.h> 30 #include <rte_dev.h> 31 #include <rte_cycles.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 void virtio_mac_addr_set(struct rte_eth_dev *dev, 72 struct ether_addr *mac_addr); 73 74 static int virtio_intr_enable(struct rte_eth_dev *dev); 75 static int virtio_intr_disable(struct rte_eth_dev *dev); 76 77 static int virtio_dev_queue_stats_mapping_set( 78 struct rte_eth_dev *eth_dev, 79 uint16_t queue_id, 80 uint8_t stat_idx, 81 uint8_t is_rx); 82 83 int virtio_logtype_init; 84 int virtio_logtype_driver; 85 86 static void virtio_notify_peers(struct rte_eth_dev *dev); 87 static void virtio_ack_link_announce(struct rte_eth_dev *dev); 88 89 /* 90 * The set of PCI devices this driver supports 91 */ 92 static const struct rte_pci_id pci_id_virtio_map[] = { 93 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) }, 94 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) }, 95 { .vendor_id = 0, /* sentinel */ }, 96 }; 97 98 struct rte_virtio_xstats_name_off { 99 char name[RTE_ETH_XSTATS_NAME_SIZE]; 100 unsigned offset; 101 }; 102 103 /* [rt]x_qX_ is prepended to the name string here */ 104 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = { 105 {"good_packets", offsetof(struct virtnet_rx, stats.packets)}, 106 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)}, 107 {"errors", offsetof(struct virtnet_rx, stats.errors)}, 108 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)}, 109 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)}, 110 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])}, 111 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])}, 112 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])}, 113 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])}, 114 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])}, 115 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])}, 116 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])}, 117 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])}, 118 }; 119 120 /* [rt]x_qX_ is prepended to the name string here */ 121 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = { 122 {"good_packets", offsetof(struct virtnet_tx, stats.packets)}, 123 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)}, 124 {"errors", offsetof(struct virtnet_tx, stats.errors)}, 125 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)}, 126 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)}, 127 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])}, 128 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])}, 129 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])}, 130 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])}, 131 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])}, 132 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])}, 133 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])}, 134 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])}, 135 }; 136 137 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \ 138 sizeof(rte_virtio_rxq_stat_strings[0])) 139 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \ 140 sizeof(rte_virtio_txq_stat_strings[0])) 141 142 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS]; 143 144 static int 145 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, 146 int *dlen, int pkt_num) 147 { 148 uint32_t head, i; 149 int k, sum = 0; 150 virtio_net_ctrl_ack status = ~0; 151 struct virtio_pmd_ctrl *result; 152 struct virtqueue *vq; 153 154 ctrl->status = status; 155 156 if (!cvq || !cvq->vq) { 157 PMD_INIT_LOG(ERR, "Control queue is not supported."); 158 return -1; 159 } 160 161 rte_spinlock_lock(&cvq->lock); 162 vq = cvq->vq; 163 head = vq->vq_desc_head_idx; 164 165 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, " 166 "vq->hw->cvq = %p vq = %p", 167 vq->vq_desc_head_idx, status, vq->hw->cvq, vq); 168 169 if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) { 170 rte_spinlock_unlock(&cvq->lock); 171 return -1; 172 } 173 174 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl, 175 sizeof(struct virtio_pmd_ctrl)); 176 177 /* 178 * Format is enforced in qemu code: 179 * One TX packet for header; 180 * At least one TX packet per argument; 181 * One RX packet for ACK. 182 */ 183 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT; 184 vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem; 185 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr); 186 vq->vq_free_cnt--; 187 i = vq->vq_ring.desc[head].next; 188 189 for (k = 0; k < pkt_num; k++) { 190 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT; 191 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 192 + sizeof(struct virtio_net_ctrl_hdr) 193 + sizeof(ctrl->status) + sizeof(uint8_t)*sum; 194 vq->vq_ring.desc[i].len = dlen[k]; 195 sum += dlen[k]; 196 vq->vq_free_cnt--; 197 i = vq->vq_ring.desc[i].next; 198 } 199 200 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE; 201 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 202 + sizeof(struct virtio_net_ctrl_hdr); 203 vq->vq_ring.desc[i].len = sizeof(ctrl->status); 204 vq->vq_free_cnt--; 205 206 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next; 207 208 vq_update_avail_ring(vq, head); 209 vq_update_avail_idx(vq); 210 211 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index); 212 213 virtqueue_notify(vq); 214 215 rte_rmb(); 216 while (VIRTQUEUE_NUSED(vq) == 0) { 217 rte_rmb(); 218 usleep(100); 219 } 220 221 while (VIRTQUEUE_NUSED(vq)) { 222 uint32_t idx, desc_idx, used_idx; 223 struct vring_used_elem *uep; 224 225 used_idx = (uint32_t)(vq->vq_used_cons_idx 226 & (vq->vq_nentries - 1)); 227 uep = &vq->vq_ring.used->ring[used_idx]; 228 idx = (uint32_t) uep->id; 229 desc_idx = idx; 230 231 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) { 232 desc_idx = vq->vq_ring.desc[desc_idx].next; 233 vq->vq_free_cnt++; 234 } 235 236 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx; 237 vq->vq_desc_head_idx = idx; 238 239 vq->vq_used_cons_idx++; 240 vq->vq_free_cnt++; 241 } 242 243 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d", 244 vq->vq_free_cnt, vq->vq_desc_head_idx); 245 246 result = cvq->virtio_net_hdr_mz->addr; 247 248 rte_spinlock_unlock(&cvq->lock); 249 return result->status; 250 } 251 252 static int 253 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues) 254 { 255 struct virtio_hw *hw = dev->data->dev_private; 256 struct virtio_pmd_ctrl ctrl; 257 int dlen[1]; 258 int ret; 259 260 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ; 261 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET; 262 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t)); 263 264 dlen[0] = sizeof(uint16_t); 265 266 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 267 if (ret) { 268 PMD_INIT_LOG(ERR, "Multiqueue configured but send command " 269 "failed, this is too late now..."); 270 return -EINVAL; 271 } 272 273 return 0; 274 } 275 276 static void 277 virtio_dev_queue_release(void *queue __rte_unused) 278 { 279 /* do nothing */ 280 } 281 282 static uint16_t 283 virtio_get_nr_vq(struct virtio_hw *hw) 284 { 285 uint16_t nr_vq = hw->max_queue_pairs * 2; 286 287 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 288 nr_vq += 1; 289 290 return nr_vq; 291 } 292 293 static void 294 virtio_init_vring(struct virtqueue *vq) 295 { 296 int size = vq->vq_nentries; 297 struct vring *vr = &vq->vq_ring; 298 uint8_t *ring_mem = vq->vq_ring_virt_mem; 299 300 PMD_INIT_FUNC_TRACE(); 301 302 /* 303 * Reinitialise since virtio port might have been stopped and restarted 304 */ 305 memset(ring_mem, 0, vq->vq_ring_size); 306 vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN); 307 vq->vq_used_cons_idx = 0; 308 vq->vq_desc_head_idx = 0; 309 vq->vq_avail_idx = 0; 310 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1); 311 vq->vq_free_cnt = vq->vq_nentries; 312 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries); 313 314 vring_desc_init(vr->desc, size); 315 316 /* 317 * Disable device(host) interrupting guest 318 */ 319 virtqueue_disable_intr(vq); 320 } 321 322 static int 323 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) 324 { 325 char vq_name[VIRTQUEUE_MAX_NAME_SZ]; 326 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ]; 327 const struct rte_memzone *mz = NULL, *hdr_mz = NULL; 328 unsigned int vq_size, size; 329 struct virtio_hw *hw = dev->data->dev_private; 330 struct virtnet_rx *rxvq = NULL; 331 struct virtnet_tx *txvq = NULL; 332 struct virtnet_ctl *cvq = NULL; 333 struct virtqueue *vq; 334 size_t sz_hdr_mz = 0; 335 void *sw_ring = NULL; 336 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx); 337 int ret; 338 339 PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx); 340 341 /* 342 * Read the virtqueue size from the Queue Size field 343 * Always power of 2 and if 0 virtqueue does not exist 344 */ 345 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx); 346 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size); 347 if (vq_size == 0) { 348 PMD_INIT_LOG(ERR, "virtqueue does not exist"); 349 return -EINVAL; 350 } 351 352 if (!rte_is_power_of_2(vq_size)) { 353 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2"); 354 return -EINVAL; 355 } 356 357 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d", 358 dev->data->port_id, vtpci_queue_idx); 359 360 size = RTE_ALIGN_CEIL(sizeof(*vq) + 361 vq_size * sizeof(struct vq_desc_extra), 362 RTE_CACHE_LINE_SIZE); 363 if (queue_type == VTNET_TQ) { 364 /* 365 * For each xmit packet, allocate a virtio_net_hdr 366 * and indirect ring elements 367 */ 368 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region); 369 } else if (queue_type == VTNET_CQ) { 370 /* Allocate a page for control vq command, data and status */ 371 sz_hdr_mz = PAGE_SIZE; 372 } 373 374 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE, 375 SOCKET_ID_ANY); 376 if (vq == NULL) { 377 PMD_INIT_LOG(ERR, "can not allocate vq"); 378 return -ENOMEM; 379 } 380 hw->vqs[vtpci_queue_idx] = vq; 381 382 vq->hw = hw; 383 vq->vq_queue_index = vtpci_queue_idx; 384 vq->vq_nentries = vq_size; 385 386 /* 387 * Reserve a memzone for vring elements 388 */ 389 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN); 390 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN); 391 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", 392 size, vq->vq_ring_size); 393 394 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, 395 SOCKET_ID_ANY, 396 0, VIRTIO_PCI_VRING_ALIGN); 397 if (mz == NULL) { 398 if (rte_errno == EEXIST) 399 mz = rte_memzone_lookup(vq_name); 400 if (mz == NULL) { 401 ret = -ENOMEM; 402 goto fail_q_alloc; 403 } 404 } 405 406 memset(mz->addr, 0, mz->len); 407 408 vq->vq_ring_mem = mz->iova; 409 vq->vq_ring_virt_mem = mz->addr; 410 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64, 411 (uint64_t)mz->iova); 412 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64, 413 (uint64_t)(uintptr_t)mz->addr); 414 415 virtio_init_vring(vq); 416 417 if (sz_hdr_mz) { 418 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr", 419 dev->data->port_id, vtpci_queue_idx); 420 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz, 421 SOCKET_ID_ANY, 0, 422 RTE_CACHE_LINE_SIZE); 423 if (hdr_mz == NULL) { 424 if (rte_errno == EEXIST) 425 hdr_mz = rte_memzone_lookup(vq_hdr_name); 426 if (hdr_mz == NULL) { 427 ret = -ENOMEM; 428 goto fail_q_alloc; 429 } 430 } 431 } 432 433 if (queue_type == VTNET_RQ) { 434 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) * 435 sizeof(vq->sw_ring[0]); 436 437 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw, 438 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY); 439 if (!sw_ring) { 440 PMD_INIT_LOG(ERR, "can not allocate RX soft ring"); 441 ret = -ENOMEM; 442 goto fail_q_alloc; 443 } 444 445 vq->sw_ring = sw_ring; 446 rxvq = &vq->rxq; 447 rxvq->vq = vq; 448 rxvq->port_id = dev->data->port_id; 449 rxvq->mz = mz; 450 } else if (queue_type == VTNET_TQ) { 451 txvq = &vq->txq; 452 txvq->vq = vq; 453 txvq->port_id = dev->data->port_id; 454 txvq->mz = mz; 455 txvq->virtio_net_hdr_mz = hdr_mz; 456 txvq->virtio_net_hdr_mem = hdr_mz->iova; 457 } else if (queue_type == VTNET_CQ) { 458 cvq = &vq->cq; 459 cvq->vq = vq; 460 cvq->mz = mz; 461 cvq->virtio_net_hdr_mz = hdr_mz; 462 cvq->virtio_net_hdr_mem = hdr_mz->iova; 463 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE); 464 465 hw->cvq = cvq; 466 } 467 468 /* For virtio_user case (that is when hw->dev is NULL), we use 469 * virtual address. And we need properly set _offset_, please see 470 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information. 471 */ 472 if (!hw->virtio_user_dev) 473 vq->offset = offsetof(struct rte_mbuf, buf_iova); 474 else { 475 vq->vq_ring_mem = (uintptr_t)mz->addr; 476 vq->offset = offsetof(struct rte_mbuf, buf_addr); 477 if (queue_type == VTNET_TQ) 478 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 479 else if (queue_type == VTNET_CQ) 480 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 481 } 482 483 if (queue_type == VTNET_TQ) { 484 struct virtio_tx_region *txr; 485 unsigned int i; 486 487 txr = hdr_mz->addr; 488 memset(txr, 0, vq_size * sizeof(*txr)); 489 for (i = 0; i < vq_size; i++) { 490 struct vring_desc *start_dp = txr[i].tx_indir; 491 492 vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir)); 493 494 /* first indirect descriptor is always the tx header */ 495 start_dp->addr = txvq->virtio_net_hdr_mem 496 + i * sizeof(*txr) 497 + offsetof(struct virtio_tx_region, tx_hdr); 498 499 start_dp->len = hw->vtnet_hdr_size; 500 start_dp->flags = VRING_DESC_F_NEXT; 501 } 502 } 503 504 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) { 505 PMD_INIT_LOG(ERR, "setup_queue failed"); 506 return -EINVAL; 507 } 508 509 return 0; 510 511 fail_q_alloc: 512 rte_free(sw_ring); 513 rte_memzone_free(hdr_mz); 514 rte_memzone_free(mz); 515 rte_free(vq); 516 517 return ret; 518 } 519 520 static void 521 virtio_free_queues(struct virtio_hw *hw) 522 { 523 uint16_t nr_vq = virtio_get_nr_vq(hw); 524 struct virtqueue *vq; 525 int queue_type; 526 uint16_t i; 527 528 if (hw->vqs == NULL) 529 return; 530 531 for (i = 0; i < nr_vq; i++) { 532 vq = hw->vqs[i]; 533 if (!vq) 534 continue; 535 536 queue_type = virtio_get_queue_type(hw, i); 537 if (queue_type == VTNET_RQ) { 538 rte_free(vq->sw_ring); 539 rte_memzone_free(vq->rxq.mz); 540 } else if (queue_type == VTNET_TQ) { 541 rte_memzone_free(vq->txq.mz); 542 rte_memzone_free(vq->txq.virtio_net_hdr_mz); 543 } else { 544 rte_memzone_free(vq->cq.mz); 545 rte_memzone_free(vq->cq.virtio_net_hdr_mz); 546 } 547 548 rte_free(vq); 549 hw->vqs[i] = NULL; 550 } 551 552 rte_free(hw->vqs); 553 hw->vqs = NULL; 554 } 555 556 static int 557 virtio_alloc_queues(struct rte_eth_dev *dev) 558 { 559 struct virtio_hw *hw = dev->data->dev_private; 560 uint16_t nr_vq = virtio_get_nr_vq(hw); 561 uint16_t i; 562 int ret; 563 564 hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0); 565 if (!hw->vqs) { 566 PMD_INIT_LOG(ERR, "failed to allocate vqs"); 567 return -ENOMEM; 568 } 569 570 for (i = 0; i < nr_vq; i++) { 571 ret = virtio_init_queue(dev, i); 572 if (ret < 0) { 573 virtio_free_queues(hw); 574 return ret; 575 } 576 } 577 578 return 0; 579 } 580 581 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev); 582 583 static void 584 virtio_dev_close(struct rte_eth_dev *dev) 585 { 586 struct virtio_hw *hw = dev->data->dev_private; 587 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; 588 589 PMD_INIT_LOG(DEBUG, "virtio_dev_close"); 590 591 /* reset the NIC */ 592 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 593 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR); 594 if (intr_conf->rxq) 595 virtio_queues_unbind_intr(dev); 596 597 if (intr_conf->lsc || intr_conf->rxq) { 598 virtio_intr_disable(dev); 599 rte_intr_efd_disable(dev->intr_handle); 600 rte_free(dev->intr_handle->intr_vec); 601 dev->intr_handle->intr_vec = NULL; 602 } 603 604 vtpci_reset(hw); 605 virtio_dev_free_mbufs(dev); 606 virtio_free_queues(hw); 607 } 608 609 static void 610 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev) 611 { 612 struct virtio_hw *hw = dev->data->dev_private; 613 struct virtio_pmd_ctrl ctrl; 614 int dlen[1]; 615 int ret; 616 617 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 618 PMD_INIT_LOG(INFO, "host does not support rx control"); 619 return; 620 } 621 622 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 623 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 624 ctrl.data[0] = 1; 625 dlen[0] = 1; 626 627 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 628 if (ret) 629 PMD_INIT_LOG(ERR, "Failed to enable promisc"); 630 } 631 632 static void 633 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev) 634 { 635 struct virtio_hw *hw = dev->data->dev_private; 636 struct virtio_pmd_ctrl ctrl; 637 int dlen[1]; 638 int ret; 639 640 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 641 PMD_INIT_LOG(INFO, "host does not support rx control"); 642 return; 643 } 644 645 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 646 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 647 ctrl.data[0] = 0; 648 dlen[0] = 1; 649 650 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 651 if (ret) 652 PMD_INIT_LOG(ERR, "Failed to disable promisc"); 653 } 654 655 static void 656 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev) 657 { 658 struct virtio_hw *hw = dev->data->dev_private; 659 struct virtio_pmd_ctrl ctrl; 660 int dlen[1]; 661 int ret; 662 663 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 664 PMD_INIT_LOG(INFO, "host does not support rx control"); 665 return; 666 } 667 668 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 669 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 670 ctrl.data[0] = 1; 671 dlen[0] = 1; 672 673 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 674 if (ret) 675 PMD_INIT_LOG(ERR, "Failed to enable allmulticast"); 676 } 677 678 static void 679 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev) 680 { 681 struct virtio_hw *hw = dev->data->dev_private; 682 struct virtio_pmd_ctrl ctrl; 683 int dlen[1]; 684 int ret; 685 686 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 687 PMD_INIT_LOG(INFO, "host does not support rx control"); 688 return; 689 } 690 691 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 692 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 693 ctrl.data[0] = 0; 694 dlen[0] = 1; 695 696 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 697 if (ret) 698 PMD_INIT_LOG(ERR, "Failed to disable allmulticast"); 699 } 700 701 #define VLAN_TAG_LEN 4 /* 802.3ac tag (not DMA'd) */ 702 static int 703 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) 704 { 705 struct virtio_hw *hw = dev->data->dev_private; 706 uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN + 707 hw->vtnet_hdr_size; 708 uint32_t frame_size = mtu + ether_hdr_len; 709 uint32_t max_frame_size = hw->max_mtu + ether_hdr_len; 710 711 max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN); 712 713 if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) { 714 PMD_INIT_LOG(ERR, "MTU should be between %d and %d", 715 ETHER_MIN_MTU, max_frame_size - ether_hdr_len); 716 return -EINVAL; 717 } 718 return 0; 719 } 720 721 static int 722 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id) 723 { 724 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; 725 struct virtqueue *vq = rxvq->vq; 726 727 virtqueue_enable_intr(vq); 728 return 0; 729 } 730 731 static int 732 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id) 733 { 734 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; 735 struct virtqueue *vq = rxvq->vq; 736 737 virtqueue_disable_intr(vq); 738 return 0; 739 } 740 741 /* 742 * dev_ops for virtio, bare necessities for basic operation 743 */ 744 static const struct eth_dev_ops virtio_eth_dev_ops = { 745 .dev_configure = virtio_dev_configure, 746 .dev_start = virtio_dev_start, 747 .dev_stop = virtio_dev_stop, 748 .dev_close = virtio_dev_close, 749 .promiscuous_enable = virtio_dev_promiscuous_enable, 750 .promiscuous_disable = virtio_dev_promiscuous_disable, 751 .allmulticast_enable = virtio_dev_allmulticast_enable, 752 .allmulticast_disable = virtio_dev_allmulticast_disable, 753 .mtu_set = virtio_mtu_set, 754 .dev_infos_get = virtio_dev_info_get, 755 .stats_get = virtio_dev_stats_get, 756 .xstats_get = virtio_dev_xstats_get, 757 .xstats_get_names = virtio_dev_xstats_get_names, 758 .stats_reset = virtio_dev_stats_reset, 759 .xstats_reset = virtio_dev_stats_reset, 760 .link_update = virtio_dev_link_update, 761 .vlan_offload_set = virtio_dev_vlan_offload_set, 762 .rx_queue_setup = virtio_dev_rx_queue_setup, 763 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable, 764 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable, 765 .rx_queue_release = virtio_dev_queue_release, 766 .rx_descriptor_done = virtio_dev_rx_queue_done, 767 .tx_queue_setup = virtio_dev_tx_queue_setup, 768 .tx_queue_release = virtio_dev_queue_release, 769 /* collect stats per queue */ 770 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set, 771 .vlan_filter_set = virtio_vlan_filter_set, 772 .mac_addr_add = virtio_mac_addr_add, 773 .mac_addr_remove = virtio_mac_addr_remove, 774 .mac_addr_set = virtio_mac_addr_set, 775 }; 776 777 static inline int 778 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev, 779 struct rte_eth_link *link) 780 { 781 struct rte_eth_link *dst = link; 782 struct rte_eth_link *src = &(dev->data->dev_link); 783 784 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 785 *(uint64_t *)src) == 0) 786 return -1; 787 788 return 0; 789 } 790 791 /** 792 * Atomically writes the link status information into global 793 * structure rte_eth_dev. 794 * 795 * @param dev 796 * - Pointer to the structure rte_eth_dev to read from. 797 * - Pointer to the buffer to be saved with the link status. 798 * 799 * @return 800 * - On success, zero. 801 * - On failure, negative value. 802 */ 803 static inline int 804 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev, 805 struct rte_eth_link *link) 806 { 807 struct rte_eth_link *dst = &(dev->data->dev_link); 808 struct rte_eth_link *src = link; 809 810 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 811 *(uint64_t *)src) == 0) 812 return -1; 813 814 return 0; 815 } 816 817 static void 818 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 819 { 820 unsigned i; 821 822 for (i = 0; i < dev->data->nb_tx_queues; i++) { 823 const struct virtnet_tx *txvq = dev->data->tx_queues[i]; 824 if (txvq == NULL) 825 continue; 826 827 stats->opackets += txvq->stats.packets; 828 stats->obytes += txvq->stats.bytes; 829 stats->oerrors += txvq->stats.errors; 830 831 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 832 stats->q_opackets[i] = txvq->stats.packets; 833 stats->q_obytes[i] = txvq->stats.bytes; 834 } 835 } 836 837 for (i = 0; i < dev->data->nb_rx_queues; i++) { 838 const struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 839 if (rxvq == NULL) 840 continue; 841 842 stats->ipackets += rxvq->stats.packets; 843 stats->ibytes += rxvq->stats.bytes; 844 stats->ierrors += rxvq->stats.errors; 845 846 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 847 stats->q_ipackets[i] = rxvq->stats.packets; 848 stats->q_ibytes[i] = rxvq->stats.bytes; 849 } 850 } 851 852 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed; 853 } 854 855 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev, 856 struct rte_eth_xstat_name *xstats_names, 857 __rte_unused unsigned limit) 858 { 859 unsigned i; 860 unsigned count = 0; 861 unsigned t; 862 863 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 864 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 865 866 if (xstats_names != NULL) { 867 /* Note: limit checked in rte_eth_xstats_names() */ 868 869 for (i = 0; i < dev->data->nb_rx_queues; i++) { 870 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 871 if (rxvq == NULL) 872 continue; 873 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 874 snprintf(xstats_names[count].name, 875 sizeof(xstats_names[count].name), 876 "rx_q%u_%s", i, 877 rte_virtio_rxq_stat_strings[t].name); 878 count++; 879 } 880 } 881 882 for (i = 0; i < dev->data->nb_tx_queues; i++) { 883 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 884 if (txvq == NULL) 885 continue; 886 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 887 snprintf(xstats_names[count].name, 888 sizeof(xstats_names[count].name), 889 "tx_q%u_%s", i, 890 rte_virtio_txq_stat_strings[t].name); 891 count++; 892 } 893 } 894 return count; 895 } 896 return nstats; 897 } 898 899 static int 900 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats, 901 unsigned n) 902 { 903 unsigned i; 904 unsigned count = 0; 905 906 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 907 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 908 909 if (n < nstats) 910 return nstats; 911 912 for (i = 0; i < dev->data->nb_rx_queues; i++) { 913 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 914 915 if (rxvq == NULL) 916 continue; 917 918 unsigned t; 919 920 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 921 xstats[count].value = *(uint64_t *)(((char *)rxvq) + 922 rte_virtio_rxq_stat_strings[t].offset); 923 xstats[count].id = count; 924 count++; 925 } 926 } 927 928 for (i = 0; i < dev->data->nb_tx_queues; i++) { 929 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 930 931 if (txvq == NULL) 932 continue; 933 934 unsigned t; 935 936 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 937 xstats[count].value = *(uint64_t *)(((char *)txvq) + 938 rte_virtio_txq_stat_strings[t].offset); 939 xstats[count].id = count; 940 count++; 941 } 942 } 943 944 return count; 945 } 946 947 static int 948 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 949 { 950 virtio_update_stats(dev, stats); 951 952 return 0; 953 } 954 955 static void 956 virtio_dev_stats_reset(struct rte_eth_dev *dev) 957 { 958 unsigned int i; 959 960 for (i = 0; i < dev->data->nb_tx_queues; i++) { 961 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 962 if (txvq == NULL) 963 continue; 964 965 txvq->stats.packets = 0; 966 txvq->stats.bytes = 0; 967 txvq->stats.errors = 0; 968 txvq->stats.multicast = 0; 969 txvq->stats.broadcast = 0; 970 memset(txvq->stats.size_bins, 0, 971 sizeof(txvq->stats.size_bins[0]) * 8); 972 } 973 974 for (i = 0; i < dev->data->nb_rx_queues; i++) { 975 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 976 if (rxvq == NULL) 977 continue; 978 979 rxvq->stats.packets = 0; 980 rxvq->stats.bytes = 0; 981 rxvq->stats.errors = 0; 982 rxvq->stats.multicast = 0; 983 rxvq->stats.broadcast = 0; 984 memset(rxvq->stats.size_bins, 0, 985 sizeof(rxvq->stats.size_bins[0]) * 8); 986 } 987 } 988 989 static void 990 virtio_set_hwaddr(struct virtio_hw *hw) 991 { 992 vtpci_write_dev_config(hw, 993 offsetof(struct virtio_net_config, mac), 994 &hw->mac_addr, ETHER_ADDR_LEN); 995 } 996 997 static void 998 virtio_get_hwaddr(struct virtio_hw *hw) 999 { 1000 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) { 1001 vtpci_read_dev_config(hw, 1002 offsetof(struct virtio_net_config, mac), 1003 &hw->mac_addr, ETHER_ADDR_LEN); 1004 } else { 1005 eth_random_addr(&hw->mac_addr[0]); 1006 virtio_set_hwaddr(hw); 1007 } 1008 } 1009 1010 static int 1011 virtio_mac_table_set(struct virtio_hw *hw, 1012 const struct virtio_net_ctrl_mac *uc, 1013 const struct virtio_net_ctrl_mac *mc) 1014 { 1015 struct virtio_pmd_ctrl ctrl; 1016 int err, len[2]; 1017 1018 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 1019 PMD_DRV_LOG(INFO, "host does not support mac table"); 1020 return -1; 1021 } 1022 1023 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1024 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 1025 1026 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries); 1027 memcpy(ctrl.data, uc, len[0]); 1028 1029 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries); 1030 memcpy(ctrl.data + len[0], mc, len[1]); 1031 1032 err = virtio_send_command(hw->cvq, &ctrl, len, 2); 1033 if (err != 0) 1034 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err); 1035 return err; 1036 } 1037 1038 static int 1039 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr, 1040 uint32_t index, uint32_t vmdq __rte_unused) 1041 { 1042 struct virtio_hw *hw = dev->data->dev_private; 1043 const struct ether_addr *addrs = dev->data->mac_addrs; 1044 unsigned int i; 1045 struct virtio_net_ctrl_mac *uc, *mc; 1046 1047 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1048 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1049 return -EINVAL; 1050 } 1051 1052 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1053 uc->entries = 0; 1054 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1055 mc->entries = 0; 1056 1057 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1058 const struct ether_addr *addr 1059 = (i == index) ? mac_addr : addrs + i; 1060 struct virtio_net_ctrl_mac *tbl 1061 = is_multicast_ether_addr(addr) ? mc : uc; 1062 1063 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN); 1064 } 1065 1066 return virtio_mac_table_set(hw, uc, mc); 1067 } 1068 1069 static void 1070 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index) 1071 { 1072 struct virtio_hw *hw = dev->data->dev_private; 1073 struct ether_addr *addrs = dev->data->mac_addrs; 1074 struct virtio_net_ctrl_mac *uc, *mc; 1075 unsigned int i; 1076 1077 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1078 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1079 return; 1080 } 1081 1082 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1083 uc->entries = 0; 1084 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1085 mc->entries = 0; 1086 1087 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1088 struct virtio_net_ctrl_mac *tbl; 1089 1090 if (i == index || is_zero_ether_addr(addrs + i)) 1091 continue; 1092 1093 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc; 1094 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN); 1095 } 1096 1097 virtio_mac_table_set(hw, uc, mc); 1098 } 1099 1100 static void 1101 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr) 1102 { 1103 struct virtio_hw *hw = dev->data->dev_private; 1104 1105 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN); 1106 1107 /* Use atomic update if available */ 1108 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 1109 struct virtio_pmd_ctrl ctrl; 1110 int len = ETHER_ADDR_LEN; 1111 1112 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1113 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; 1114 1115 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN); 1116 virtio_send_command(hw->cvq, &ctrl, &len, 1); 1117 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) 1118 virtio_set_hwaddr(hw); 1119 } 1120 1121 static int 1122 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 1123 { 1124 struct virtio_hw *hw = dev->data->dev_private; 1125 struct virtio_pmd_ctrl ctrl; 1126 int len; 1127 1128 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) 1129 return -ENOTSUP; 1130 1131 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN; 1132 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; 1133 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id)); 1134 len = sizeof(vlan_id); 1135 1136 return virtio_send_command(hw->cvq, &ctrl, &len, 1); 1137 } 1138 1139 static int 1140 virtio_intr_enable(struct rte_eth_dev *dev) 1141 { 1142 struct virtio_hw *hw = dev->data->dev_private; 1143 1144 if (rte_intr_enable(dev->intr_handle) < 0) 1145 return -1; 1146 1147 if (!hw->virtio_user_dev) 1148 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev)); 1149 1150 return 0; 1151 } 1152 1153 static int 1154 virtio_intr_disable(struct rte_eth_dev *dev) 1155 { 1156 struct virtio_hw *hw = dev->data->dev_private; 1157 1158 if (rte_intr_disable(dev->intr_handle) < 0) 1159 return -1; 1160 1161 if (!hw->virtio_user_dev) 1162 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev)); 1163 1164 return 0; 1165 } 1166 1167 static int 1168 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features) 1169 { 1170 uint64_t host_features; 1171 1172 /* Prepare guest_features: feature that driver wants to support */ 1173 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64, 1174 req_features); 1175 1176 /* Read device(host) feature bits */ 1177 host_features = VTPCI_OPS(hw)->get_features(hw); 1178 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64, 1179 host_features); 1180 1181 /* If supported, ensure MTU value is valid before acknowledging it. */ 1182 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) { 1183 struct virtio_net_config config; 1184 1185 vtpci_read_dev_config(hw, 1186 offsetof(struct virtio_net_config, mtu), 1187 &config.mtu, sizeof(config.mtu)); 1188 1189 if (config.mtu < ETHER_MIN_MTU) 1190 req_features &= ~(1ULL << VIRTIO_NET_F_MTU); 1191 } 1192 1193 /* 1194 * Negotiate features: Subset of device feature bits are written back 1195 * guest feature bits. 1196 */ 1197 hw->guest_features = req_features; 1198 hw->guest_features = vtpci_negotiate_features(hw, host_features); 1199 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64, 1200 hw->guest_features); 1201 1202 if (hw->modern) { 1203 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) { 1204 PMD_INIT_LOG(ERR, 1205 "VIRTIO_F_VERSION_1 features is not enabled."); 1206 return -1; 1207 } 1208 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK); 1209 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) { 1210 PMD_INIT_LOG(ERR, 1211 "failed to set FEATURES_OK status!"); 1212 return -1; 1213 } 1214 } 1215 1216 hw->req_guest_features = req_features; 1217 1218 return 0; 1219 } 1220 1221 int 1222 virtio_dev_pause(struct rte_eth_dev *dev) 1223 { 1224 struct virtio_hw *hw = dev->data->dev_private; 1225 1226 rte_spinlock_lock(&hw->state_lock); 1227 1228 if (hw->started == 0) { 1229 /* Device is just stopped. */ 1230 rte_spinlock_unlock(&hw->state_lock); 1231 return -1; 1232 } 1233 hw->started = 0; 1234 /* 1235 * Prevent the worker threads from touching queues to avoid contention, 1236 * 1 ms should be enough for the ongoing Tx function to finish. 1237 */ 1238 rte_delay_ms(1); 1239 return 0; 1240 } 1241 1242 /* 1243 * Recover hw state to let the worker threads continue. 1244 */ 1245 void 1246 virtio_dev_resume(struct rte_eth_dev *dev) 1247 { 1248 struct virtio_hw *hw = dev->data->dev_private; 1249 1250 hw->started = 1; 1251 rte_spinlock_unlock(&hw->state_lock); 1252 } 1253 1254 /* 1255 * Should be called only after device is paused. 1256 */ 1257 int 1258 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts, 1259 int nb_pkts) 1260 { 1261 struct virtio_hw *hw = dev->data->dev_private; 1262 struct virtnet_tx *txvq = dev->data->tx_queues[0]; 1263 int ret; 1264 1265 hw->inject_pkts = tx_pkts; 1266 ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts); 1267 hw->inject_pkts = NULL; 1268 1269 return ret; 1270 } 1271 1272 static void 1273 virtio_notify_peers(struct rte_eth_dev *dev) 1274 { 1275 struct virtio_hw *hw = dev->data->dev_private; 1276 struct virtnet_rx *rxvq = dev->data->rx_queues[0]; 1277 struct rte_mbuf *rarp_mbuf; 1278 1279 rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool, 1280 (struct ether_addr *)hw->mac_addr); 1281 if (rarp_mbuf == NULL) { 1282 PMD_DRV_LOG(ERR, "failed to make RARP packet."); 1283 return; 1284 } 1285 1286 /* If virtio port just stopped, no need to send RARP */ 1287 if (virtio_dev_pause(dev) < 0) { 1288 rte_pktmbuf_free(rarp_mbuf); 1289 return; 1290 } 1291 1292 virtio_inject_pkts(dev, &rarp_mbuf, 1); 1293 virtio_dev_resume(dev); 1294 } 1295 1296 static void 1297 virtio_ack_link_announce(struct rte_eth_dev *dev) 1298 { 1299 struct virtio_hw *hw = dev->data->dev_private; 1300 struct virtio_pmd_ctrl ctrl; 1301 1302 ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE; 1303 ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK; 1304 1305 virtio_send_command(hw->cvq, &ctrl, NULL, 0); 1306 } 1307 1308 /* 1309 * Process virtio config changed interrupt. Call the callback 1310 * if link state changed, generate gratuitous RARP packet if 1311 * the status indicates an ANNOUNCE. 1312 */ 1313 void 1314 virtio_interrupt_handler(void *param) 1315 { 1316 struct rte_eth_dev *dev = param; 1317 struct virtio_hw *hw = dev->data->dev_private; 1318 uint8_t isr; 1319 1320 /* Read interrupt status which clears interrupt */ 1321 isr = vtpci_isr(hw); 1322 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr); 1323 1324 if (virtio_intr_enable(dev) < 0) 1325 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1326 1327 if (isr & VIRTIO_PCI_ISR_CONFIG) { 1328 if (virtio_dev_link_update(dev, 0) == 0) 1329 _rte_eth_dev_callback_process(dev, 1330 RTE_ETH_EVENT_INTR_LSC, 1331 NULL); 1332 } 1333 1334 if (isr & VIRTIO_NET_S_ANNOUNCE) { 1335 virtio_notify_peers(dev); 1336 virtio_ack_link_announce(dev); 1337 } 1338 } 1339 1340 /* set rx and tx handlers according to what is supported */ 1341 static void 1342 set_rxtx_funcs(struct rte_eth_dev *eth_dev) 1343 { 1344 struct virtio_hw *hw = eth_dev->data->dev_private; 1345 1346 if (hw->use_simple_rx) { 1347 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u", 1348 eth_dev->data->port_id); 1349 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec; 1350 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1351 PMD_INIT_LOG(INFO, 1352 "virtio: using mergeable buffer Rx path on port %u", 1353 eth_dev->data->port_id); 1354 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts; 1355 } else { 1356 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u", 1357 eth_dev->data->port_id); 1358 eth_dev->rx_pkt_burst = &virtio_recv_pkts; 1359 } 1360 1361 if (hw->use_simple_tx) { 1362 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u", 1363 eth_dev->data->port_id); 1364 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple; 1365 } else { 1366 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u", 1367 eth_dev->data->port_id); 1368 eth_dev->tx_pkt_burst = virtio_xmit_pkts; 1369 } 1370 } 1371 1372 /* Only support 1:1 queue/interrupt mapping so far. 1373 * TODO: support n:1 queue/interrupt mapping when there are limited number of 1374 * interrupt vectors (<N+1). 1375 */ 1376 static int 1377 virtio_queues_bind_intr(struct rte_eth_dev *dev) 1378 { 1379 uint32_t i; 1380 struct virtio_hw *hw = dev->data->dev_private; 1381 1382 PMD_INIT_LOG(INFO, "queue/interrupt binding"); 1383 for (i = 0; i < dev->data->nb_rx_queues; ++i) { 1384 dev->intr_handle->intr_vec[i] = i + 1; 1385 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) == 1386 VIRTIO_MSI_NO_VECTOR) { 1387 PMD_DRV_LOG(ERR, "failed to set queue vector"); 1388 return -EBUSY; 1389 } 1390 } 1391 1392 return 0; 1393 } 1394 1395 static void 1396 virtio_queues_unbind_intr(struct rte_eth_dev *dev) 1397 { 1398 uint32_t i; 1399 struct virtio_hw *hw = dev->data->dev_private; 1400 1401 PMD_INIT_LOG(INFO, "queue/interrupt unbinding"); 1402 for (i = 0; i < dev->data->nb_rx_queues; ++i) 1403 VTPCI_OPS(hw)->set_queue_irq(hw, 1404 hw->vqs[i * VTNET_CQ], 1405 VIRTIO_MSI_NO_VECTOR); 1406 } 1407 1408 static int 1409 virtio_configure_intr(struct rte_eth_dev *dev) 1410 { 1411 struct virtio_hw *hw = dev->data->dev_private; 1412 1413 if (!rte_intr_cap_multiple(dev->intr_handle)) { 1414 PMD_INIT_LOG(ERR, "Multiple intr vector not supported"); 1415 return -ENOTSUP; 1416 } 1417 1418 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) { 1419 PMD_INIT_LOG(ERR, "Fail to create eventfd"); 1420 return -1; 1421 } 1422 1423 if (!dev->intr_handle->intr_vec) { 1424 dev->intr_handle->intr_vec = 1425 rte_zmalloc("intr_vec", 1426 hw->max_queue_pairs * sizeof(int), 0); 1427 if (!dev->intr_handle->intr_vec) { 1428 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors", 1429 hw->max_queue_pairs); 1430 return -ENOMEM; 1431 } 1432 } 1433 1434 /* Re-register callback to update max_intr */ 1435 rte_intr_callback_unregister(dev->intr_handle, 1436 virtio_interrupt_handler, 1437 dev); 1438 rte_intr_callback_register(dev->intr_handle, 1439 virtio_interrupt_handler, 1440 dev); 1441 1442 /* DO NOT try to remove this! This function will enable msix, or QEMU 1443 * will encounter SIGSEGV when DRIVER_OK is sent. 1444 * And for legacy devices, this should be done before queue/vec binding 1445 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR 1446 * (22) will be ignored. 1447 */ 1448 if (virtio_intr_enable(dev) < 0) { 1449 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1450 return -1; 1451 } 1452 1453 if (virtio_queues_bind_intr(dev) < 0) { 1454 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt"); 1455 return -1; 1456 } 1457 1458 return 0; 1459 } 1460 1461 /* reset device and renegotiate features if needed */ 1462 static int 1463 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) 1464 { 1465 struct virtio_hw *hw = eth_dev->data->dev_private; 1466 struct virtio_net_config *config; 1467 struct virtio_net_config local_config; 1468 struct rte_pci_device *pci_dev = NULL; 1469 int ret; 1470 1471 /* Reset the device although not necessary at startup */ 1472 vtpci_reset(hw); 1473 1474 if (hw->vqs) { 1475 virtio_dev_free_mbufs(eth_dev); 1476 virtio_free_queues(hw); 1477 } 1478 1479 /* Tell the host we've noticed this device. */ 1480 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK); 1481 1482 /* Tell the host we've known how to drive the device. */ 1483 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER); 1484 if (virtio_negotiate_features(hw, req_features) < 0) 1485 return -1; 1486 1487 if (!hw->virtio_user_dev) { 1488 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev); 1489 rte_eth_copy_pci_info(eth_dev, pci_dev); 1490 } 1491 1492 /* If host does not support both status and MSI-X then disable LSC */ 1493 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && 1494 hw->use_msix != VIRTIO_MSIX_NONE) 1495 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC; 1496 else 1497 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC; 1498 1499 /* Setting up rx_header size for the device */ 1500 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || 1501 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) 1502 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); 1503 else 1504 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr); 1505 1506 /* Copy the permanent MAC address to: virtio_hw */ 1507 virtio_get_hwaddr(hw); 1508 ether_addr_copy((struct ether_addr *) hw->mac_addr, 1509 ð_dev->data->mac_addrs[0]); 1510 PMD_INIT_LOG(DEBUG, 1511 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1512 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2], 1513 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]); 1514 1515 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) { 1516 config = &local_config; 1517 1518 vtpci_read_dev_config(hw, 1519 offsetof(struct virtio_net_config, mac), 1520 &config->mac, sizeof(config->mac)); 1521 1522 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1523 vtpci_read_dev_config(hw, 1524 offsetof(struct virtio_net_config, status), 1525 &config->status, sizeof(config->status)); 1526 } else { 1527 PMD_INIT_LOG(DEBUG, 1528 "VIRTIO_NET_F_STATUS is not supported"); 1529 config->status = 0; 1530 } 1531 1532 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) { 1533 vtpci_read_dev_config(hw, 1534 offsetof(struct virtio_net_config, max_virtqueue_pairs), 1535 &config->max_virtqueue_pairs, 1536 sizeof(config->max_virtqueue_pairs)); 1537 } else { 1538 PMD_INIT_LOG(DEBUG, 1539 "VIRTIO_NET_F_MQ is not supported"); 1540 config->max_virtqueue_pairs = 1; 1541 } 1542 1543 hw->max_queue_pairs = config->max_virtqueue_pairs; 1544 1545 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) { 1546 vtpci_read_dev_config(hw, 1547 offsetof(struct virtio_net_config, mtu), 1548 &config->mtu, 1549 sizeof(config->mtu)); 1550 1551 /* 1552 * MTU value has already been checked at negotiation 1553 * time, but check again in case it has changed since 1554 * then, which should not happen. 1555 */ 1556 if (config->mtu < ETHER_MIN_MTU) { 1557 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)", 1558 config->mtu); 1559 return -1; 1560 } 1561 1562 hw->max_mtu = config->mtu; 1563 /* Set initial MTU to maximum one supported by vhost */ 1564 eth_dev->data->mtu = config->mtu; 1565 1566 } else { 1567 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN - 1568 VLAN_TAG_LEN - hw->vtnet_hdr_size; 1569 } 1570 1571 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d", 1572 config->max_virtqueue_pairs); 1573 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status); 1574 PMD_INIT_LOG(DEBUG, 1575 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1576 config->mac[0], config->mac[1], 1577 config->mac[2], config->mac[3], 1578 config->mac[4], config->mac[5]); 1579 } else { 1580 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1"); 1581 hw->max_queue_pairs = 1; 1582 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN - 1583 VLAN_TAG_LEN - hw->vtnet_hdr_size; 1584 } 1585 1586 ret = virtio_alloc_queues(eth_dev); 1587 if (ret < 0) 1588 return ret; 1589 1590 if (eth_dev->data->dev_conf.intr_conf.rxq) { 1591 if (virtio_configure_intr(eth_dev) < 0) { 1592 PMD_INIT_LOG(ERR, "failed to configure interrupt"); 1593 return -1; 1594 } 1595 } 1596 1597 vtpci_reinit_complete(hw); 1598 1599 if (pci_dev) 1600 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 1601 eth_dev->data->port_id, pci_dev->id.vendor_id, 1602 pci_dev->id.device_id); 1603 1604 return 0; 1605 } 1606 1607 /* 1608 * Remap the PCI device again (IO port map for legacy device and 1609 * memory map for modern device), so that the secondary process 1610 * could have the PCI initiated correctly. 1611 */ 1612 static int 1613 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw) 1614 { 1615 if (hw->modern) { 1616 /* 1617 * We don't have to re-parse the PCI config space, since 1618 * rte_pci_map_device() makes sure the mapped address 1619 * in secondary process would equal to the one mapped in 1620 * the primary process: error will be returned if that 1621 * requirement is not met. 1622 * 1623 * That said, we could simply reuse all cap pointers 1624 * (such as dev_cfg, common_cfg, etc.) parsed from the 1625 * primary process, which is stored in shared memory. 1626 */ 1627 if (rte_pci_map_device(pci_dev)) { 1628 PMD_INIT_LOG(DEBUG, "failed to map pci device!"); 1629 return -1; 1630 } 1631 } else { 1632 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0) 1633 return -1; 1634 } 1635 1636 return 0; 1637 } 1638 1639 static void 1640 virtio_set_vtpci_ops(struct virtio_hw *hw) 1641 { 1642 #ifdef RTE_VIRTIO_USER 1643 if (hw->virtio_user_dev) 1644 VTPCI_OPS(hw) = &virtio_user_ops; 1645 else 1646 #endif 1647 if (hw->modern) 1648 VTPCI_OPS(hw) = &modern_ops; 1649 else 1650 VTPCI_OPS(hw) = &legacy_ops; 1651 } 1652 1653 /* 1654 * This function is based on probe() function in virtio_pci.c 1655 * It returns 0 on success. 1656 */ 1657 int 1658 eth_virtio_dev_init(struct rte_eth_dev *eth_dev) 1659 { 1660 struct virtio_hw *hw = eth_dev->data->dev_private; 1661 int ret; 1662 1663 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf)); 1664 1665 eth_dev->dev_ops = &virtio_eth_dev_ops; 1666 1667 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1668 if (!hw->virtio_user_dev) { 1669 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1670 if (ret) 1671 return ret; 1672 } 1673 1674 virtio_set_vtpci_ops(hw); 1675 set_rxtx_funcs(eth_dev); 1676 1677 return 0; 1678 } 1679 1680 /* Allocate memory for storing MAC addresses */ 1681 eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0); 1682 if (eth_dev->data->mac_addrs == NULL) { 1683 PMD_INIT_LOG(ERR, 1684 "Failed to allocate %d bytes needed to store MAC addresses", 1685 VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN); 1686 return -ENOMEM; 1687 } 1688 1689 hw->port_id = eth_dev->data->port_id; 1690 /* For virtio_user case the hw->virtio_user_dev is populated by 1691 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called. 1692 */ 1693 if (!hw->virtio_user_dev) { 1694 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1695 if (ret) 1696 goto out; 1697 } 1698 1699 /* reset device and negotiate default features */ 1700 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES); 1701 if (ret < 0) 1702 goto out; 1703 1704 /* Setup interrupt callback */ 1705 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1706 rte_intr_callback_register(eth_dev->intr_handle, 1707 virtio_interrupt_handler, eth_dev); 1708 1709 return 0; 1710 1711 out: 1712 rte_free(eth_dev->data->mac_addrs); 1713 return ret; 1714 } 1715 1716 static int 1717 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev) 1718 { 1719 PMD_INIT_FUNC_TRACE(); 1720 1721 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 1722 return -EPERM; 1723 1724 virtio_dev_stop(eth_dev); 1725 virtio_dev_close(eth_dev); 1726 1727 eth_dev->dev_ops = NULL; 1728 eth_dev->tx_pkt_burst = NULL; 1729 eth_dev->rx_pkt_burst = NULL; 1730 1731 rte_free(eth_dev->data->mac_addrs); 1732 eth_dev->data->mac_addrs = NULL; 1733 1734 /* reset interrupt callback */ 1735 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1736 rte_intr_callback_unregister(eth_dev->intr_handle, 1737 virtio_interrupt_handler, 1738 eth_dev); 1739 if (eth_dev->device) 1740 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev)); 1741 1742 PMD_INIT_LOG(DEBUG, "dev_uninit completed"); 1743 1744 return 0; 1745 } 1746 1747 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 1748 struct rte_pci_device *pci_dev) 1749 { 1750 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw), 1751 eth_virtio_dev_init); 1752 } 1753 1754 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev) 1755 { 1756 return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit); 1757 } 1758 1759 static struct rte_pci_driver rte_virtio_pmd = { 1760 .driver = { 1761 .name = "net_virtio", 1762 }, 1763 .id_table = pci_id_virtio_map, 1764 .drv_flags = 0, 1765 .probe = eth_virtio_pci_probe, 1766 .remove = eth_virtio_pci_remove, 1767 }; 1768 1769 RTE_INIT(rte_virtio_pmd_init); 1770 static void 1771 rte_virtio_pmd_init(void) 1772 { 1773 if (rte_eal_iopl_init() != 0) { 1774 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD"); 1775 return; 1776 } 1777 1778 rte_pci_register(&rte_virtio_pmd); 1779 } 1780 1781 /* 1782 * Configure virtio device 1783 * It returns 0 on success. 1784 */ 1785 static int 1786 virtio_dev_configure(struct rte_eth_dev *dev) 1787 { 1788 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 1789 struct virtio_hw *hw = dev->data->dev_private; 1790 uint64_t req_features; 1791 int ret; 1792 1793 PMD_INIT_LOG(DEBUG, "configure"); 1794 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES; 1795 1796 if (dev->data->dev_conf.intr_conf.rxq) { 1797 ret = virtio_init_device(dev, hw->req_guest_features); 1798 if (ret < 0) 1799 return ret; 1800 } 1801 1802 /* The name hw_ip_checksum is a bit confusing since it can be 1803 * set by the application to request L3 and/or L4 checksums. In 1804 * case of virtio, only L4 checksum is supported. 1805 */ 1806 if (rxmode->hw_ip_checksum) 1807 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM); 1808 1809 if (rxmode->enable_lro) 1810 req_features |= 1811 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 1812 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 1813 1814 /* if request features changed, reinit the device */ 1815 if (req_features != hw->req_guest_features) { 1816 ret = virtio_init_device(dev, req_features); 1817 if (ret < 0) 1818 return ret; 1819 } 1820 1821 if (rxmode->hw_ip_checksum && 1822 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) { 1823 PMD_DRV_LOG(ERR, 1824 "rx checksum not available on this host"); 1825 return -ENOTSUP; 1826 } 1827 1828 if (rxmode->enable_lro && 1829 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) || 1830 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) { 1831 PMD_DRV_LOG(ERR, 1832 "Large Receive Offload not available on this host"); 1833 return -ENOTSUP; 1834 } 1835 1836 /* start control queue */ 1837 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 1838 virtio_dev_cq_start(dev); 1839 1840 hw->vlan_strip = rxmode->hw_vlan_strip; 1841 1842 if (rxmode->hw_vlan_filter 1843 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 1844 PMD_DRV_LOG(ERR, 1845 "vlan filtering not available on this host"); 1846 return -ENOTSUP; 1847 } 1848 1849 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1850 /* Enable vector (0) for Link State Intrerrupt */ 1851 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) == 1852 VIRTIO_MSI_NO_VECTOR) { 1853 PMD_DRV_LOG(ERR, "failed to set config vector"); 1854 return -EBUSY; 1855 } 1856 1857 rte_spinlock_init(&hw->state_lock); 1858 1859 hw->use_simple_rx = 1; 1860 hw->use_simple_tx = 1; 1861 1862 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM 1863 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) { 1864 hw->use_simple_rx = 0; 1865 hw->use_simple_tx = 0; 1866 } 1867 #endif 1868 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1869 hw->use_simple_rx = 0; 1870 hw->use_simple_tx = 0; 1871 } 1872 1873 if (rxmode->hw_ip_checksum) 1874 hw->use_simple_rx = 0; 1875 1876 return 0; 1877 } 1878 1879 1880 static int 1881 virtio_dev_start(struct rte_eth_dev *dev) 1882 { 1883 uint16_t nb_queues, i; 1884 struct virtnet_rx *rxvq; 1885 struct virtnet_tx *txvq __rte_unused; 1886 struct virtio_hw *hw = dev->data->dev_private; 1887 int ret; 1888 1889 /* Finish the initialization of the queues */ 1890 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1891 ret = virtio_dev_rx_queue_setup_finish(dev, i); 1892 if (ret < 0) 1893 return ret; 1894 } 1895 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1896 ret = virtio_dev_tx_queue_setup_finish(dev, i); 1897 if (ret < 0) 1898 return ret; 1899 } 1900 1901 /* check if lsc interrupt feature is enabled */ 1902 if (dev->data->dev_conf.intr_conf.lsc) { 1903 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) { 1904 PMD_DRV_LOG(ERR, "link status not supported by host"); 1905 return -ENOTSUP; 1906 } 1907 } 1908 1909 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that 1910 * in device configure, but it could be unmapped when device is 1911 * stopped. 1912 */ 1913 if (dev->data->dev_conf.intr_conf.lsc || 1914 dev->data->dev_conf.intr_conf.rxq) { 1915 virtio_intr_disable(dev); 1916 1917 if (virtio_intr_enable(dev) < 0) { 1918 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1919 return -EIO; 1920 } 1921 } 1922 1923 /*Notify the backend 1924 *Otherwise the tap backend might already stop its queue due to fullness. 1925 *vhost backend will have no chance to be waked up 1926 */ 1927 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues); 1928 if (hw->max_queue_pairs > 1) { 1929 if (virtio_set_multiple_queues(dev, nb_queues) != 0) 1930 return -EINVAL; 1931 } 1932 1933 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues); 1934 1935 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1936 rxvq = dev->data->rx_queues[i]; 1937 /* Flush the old packets */ 1938 virtqueue_rxvq_flush(rxvq->vq); 1939 virtqueue_notify(rxvq->vq); 1940 } 1941 1942 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1943 txvq = dev->data->tx_queues[i]; 1944 virtqueue_notify(txvq->vq); 1945 } 1946 1947 PMD_INIT_LOG(DEBUG, "Notified backend at initialization"); 1948 1949 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1950 rxvq = dev->data->rx_queues[i]; 1951 VIRTQUEUE_DUMP(rxvq->vq); 1952 } 1953 1954 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1955 txvq = dev->data->tx_queues[i]; 1956 VIRTQUEUE_DUMP(txvq->vq); 1957 } 1958 1959 set_rxtx_funcs(dev); 1960 hw->started = 1; 1961 1962 /* Initialize Link state */ 1963 virtio_dev_link_update(dev, 0); 1964 1965 return 0; 1966 } 1967 1968 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev) 1969 { 1970 struct virtio_hw *hw = dev->data->dev_private; 1971 uint16_t nr_vq = virtio_get_nr_vq(hw); 1972 const char *type __rte_unused; 1973 unsigned int i, mbuf_num = 0; 1974 struct virtqueue *vq; 1975 struct rte_mbuf *buf; 1976 int queue_type; 1977 1978 for (i = 0; i < nr_vq; i++) { 1979 vq = hw->vqs[i]; 1980 if (!vq) 1981 continue; 1982 1983 queue_type = virtio_get_queue_type(hw, i); 1984 if (queue_type == VTNET_RQ) 1985 type = "rxq"; 1986 else if (queue_type == VTNET_TQ) 1987 type = "txq"; 1988 else 1989 continue; 1990 1991 PMD_INIT_LOG(DEBUG, 1992 "Before freeing %s[%d] used and unused buf", 1993 type, i); 1994 VIRTQUEUE_DUMP(vq); 1995 1996 while ((buf = virtqueue_detach_unused(vq)) != NULL) { 1997 rte_pktmbuf_free(buf); 1998 mbuf_num++; 1999 } 2000 2001 PMD_INIT_LOG(DEBUG, 2002 "After freeing %s[%d] used and unused buf", 2003 type, i); 2004 VIRTQUEUE_DUMP(vq); 2005 } 2006 2007 PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num); 2008 } 2009 2010 /* 2011 * Stop device: disable interrupt and mark link down 2012 */ 2013 static void 2014 virtio_dev_stop(struct rte_eth_dev *dev) 2015 { 2016 struct virtio_hw *hw = dev->data->dev_private; 2017 struct rte_eth_link link; 2018 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; 2019 2020 PMD_INIT_LOG(DEBUG, "stop"); 2021 2022 rte_spinlock_lock(&hw->state_lock); 2023 if (intr_conf->lsc || intr_conf->rxq) 2024 virtio_intr_disable(dev); 2025 2026 hw->started = 0; 2027 memset(&link, 0, sizeof(link)); 2028 virtio_dev_atomic_write_link_status(dev, &link); 2029 rte_spinlock_unlock(&hw->state_lock); 2030 } 2031 2032 static int 2033 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete) 2034 { 2035 struct rte_eth_link link, old; 2036 uint16_t status; 2037 struct virtio_hw *hw = dev->data->dev_private; 2038 memset(&link, 0, sizeof(link)); 2039 virtio_dev_atomic_read_link_status(dev, &link); 2040 old = link; 2041 link.link_duplex = ETH_LINK_FULL_DUPLEX; 2042 link.link_speed = ETH_SPEED_NUM_10G; 2043 2044 if (hw->started == 0) { 2045 link.link_status = ETH_LINK_DOWN; 2046 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 2047 PMD_INIT_LOG(DEBUG, "Get link status from hw"); 2048 vtpci_read_dev_config(hw, 2049 offsetof(struct virtio_net_config, status), 2050 &status, sizeof(status)); 2051 if ((status & VIRTIO_NET_S_LINK_UP) == 0) { 2052 link.link_status = ETH_LINK_DOWN; 2053 PMD_INIT_LOG(DEBUG, "Port %d is down", 2054 dev->data->port_id); 2055 } else { 2056 link.link_status = ETH_LINK_UP; 2057 PMD_INIT_LOG(DEBUG, "Port %d is up", 2058 dev->data->port_id); 2059 } 2060 } else { 2061 link.link_status = ETH_LINK_UP; 2062 } 2063 virtio_dev_atomic_write_link_status(dev, &link); 2064 2065 return (old.link_status == link.link_status) ? -1 : 0; 2066 } 2067 2068 static int 2069 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask) 2070 { 2071 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 2072 struct virtio_hw *hw = dev->data->dev_private; 2073 2074 if (mask & ETH_VLAN_FILTER_MASK) { 2075 if (rxmode->hw_vlan_filter && 2076 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 2077 2078 PMD_DRV_LOG(NOTICE, 2079 "vlan filtering not available on this host"); 2080 2081 return -ENOTSUP; 2082 } 2083 } 2084 2085 if (mask & ETH_VLAN_STRIP_MASK) 2086 hw->vlan_strip = rxmode->hw_vlan_strip; 2087 2088 return 0; 2089 } 2090 2091 static void 2092 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) 2093 { 2094 uint64_t tso_mask, host_features; 2095 struct virtio_hw *hw = dev->data->dev_private; 2096 2097 dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */ 2098 2099 dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL; 2100 dev_info->max_rx_queues = 2101 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES); 2102 dev_info->max_tx_queues = 2103 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES); 2104 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE; 2105 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN; 2106 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS; 2107 dev_info->default_txconf = (struct rte_eth_txconf) { 2108 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS 2109 }; 2110 2111 host_features = VTPCI_OPS(hw)->get_features(hw); 2112 dev_info->rx_offload_capa = 0; 2113 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) { 2114 dev_info->rx_offload_capa |= 2115 DEV_RX_OFFLOAD_TCP_CKSUM | 2116 DEV_RX_OFFLOAD_UDP_CKSUM; 2117 } 2118 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 2119 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 2120 if ((host_features & tso_mask) == tso_mask) 2121 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO; 2122 2123 dev_info->tx_offload_capa = 0; 2124 if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) { 2125 dev_info->tx_offload_capa |= 2126 DEV_TX_OFFLOAD_UDP_CKSUM | 2127 DEV_TX_OFFLOAD_TCP_CKSUM; 2128 } 2129 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) | 2130 (1ULL << VIRTIO_NET_F_HOST_TSO6); 2131 if ((hw->guest_features & tso_mask) == tso_mask) 2132 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO; 2133 } 2134 2135 /* 2136 * It enables testpmd to collect per queue stats. 2137 */ 2138 static int 2139 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev, 2140 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx, 2141 __rte_unused uint8_t is_rx) 2142 { 2143 return 0; 2144 } 2145 2146 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__); 2147 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map); 2148 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci"); 2149 2150 RTE_INIT(virtio_init_log); 2151 static void 2152 virtio_init_log(void) 2153 { 2154 virtio_logtype_init = rte_log_register("pmd.virtio.init"); 2155 if (virtio_logtype_init >= 0) 2156 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE); 2157 virtio_logtype_driver = rte_log_register("pmd.virtio.driver"); 2158 if (virtio_logtype_driver >= 0) 2159 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE); 2160 } 2161