1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stdint.h> 35 #include <string.h> 36 #include <stdio.h> 37 #include <errno.h> 38 #include <unistd.h> 39 40 #include <rte_ethdev.h> 41 #include <rte_ethdev_pci.h> 42 #include <rte_memcpy.h> 43 #include <rte_string_fns.h> 44 #include <rte_memzone.h> 45 #include <rte_malloc.h> 46 #include <rte_atomic.h> 47 #include <rte_branch_prediction.h> 48 #include <rte_pci.h> 49 #include <rte_ether.h> 50 #include <rte_common.h> 51 #include <rte_errno.h> 52 53 #include <rte_memory.h> 54 #include <rte_eal.h> 55 #include <rte_dev.h> 56 57 #include "virtio_ethdev.h" 58 #include "virtio_pci.h" 59 #include "virtio_logs.h" 60 #include "virtqueue.h" 61 #include "virtio_rxtx.h" 62 63 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev); 64 static int virtio_dev_configure(struct rte_eth_dev *dev); 65 static int virtio_dev_start(struct rte_eth_dev *dev); 66 static void virtio_dev_stop(struct rte_eth_dev *dev); 67 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev); 68 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev); 69 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev); 70 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev); 71 static void virtio_dev_info_get(struct rte_eth_dev *dev, 72 struct rte_eth_dev_info *dev_info); 73 static int virtio_dev_link_update(struct rte_eth_dev *dev, 74 int wait_to_complete); 75 76 static void virtio_set_hwaddr(struct virtio_hw *hw); 77 static void virtio_get_hwaddr(struct virtio_hw *hw); 78 79 static void virtio_dev_stats_get(struct rte_eth_dev *dev, 80 struct rte_eth_stats *stats); 81 static int virtio_dev_xstats_get(struct rte_eth_dev *dev, 82 struct rte_eth_xstat *xstats, unsigned n); 83 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev, 84 struct rte_eth_xstat_name *xstats_names, 85 unsigned limit); 86 static void virtio_dev_stats_reset(struct rte_eth_dev *dev); 87 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev); 88 static int virtio_vlan_filter_set(struct rte_eth_dev *dev, 89 uint16_t vlan_id, int on); 90 static int virtio_mac_addr_add(struct rte_eth_dev *dev, 91 struct ether_addr *mac_addr, 92 uint32_t index, uint32_t vmdq); 93 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index); 94 static void virtio_mac_addr_set(struct rte_eth_dev *dev, 95 struct ether_addr *mac_addr); 96 97 static int virtio_dev_queue_stats_mapping_set( 98 struct rte_eth_dev *eth_dev, 99 uint16_t queue_id, 100 uint8_t stat_idx, 101 uint8_t is_rx); 102 103 /* 104 * The set of PCI devices this driver supports 105 */ 106 static const struct rte_pci_id pci_id_virtio_map[] = { 107 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) }, 108 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) }, 109 { .vendor_id = 0, /* sentinel */ }, 110 }; 111 112 struct rte_virtio_xstats_name_off { 113 char name[RTE_ETH_XSTATS_NAME_SIZE]; 114 unsigned offset; 115 }; 116 117 /* [rt]x_qX_ is prepended to the name string here */ 118 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = { 119 {"good_packets", offsetof(struct virtnet_rx, stats.packets)}, 120 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)}, 121 {"errors", offsetof(struct virtnet_rx, stats.errors)}, 122 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)}, 123 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)}, 124 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])}, 125 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])}, 126 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])}, 127 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])}, 128 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])}, 129 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])}, 130 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])}, 131 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])}, 132 }; 133 134 /* [rt]x_qX_ is prepended to the name string here */ 135 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = { 136 {"good_packets", offsetof(struct virtnet_tx, stats.packets)}, 137 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)}, 138 {"errors", offsetof(struct virtnet_tx, stats.errors)}, 139 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)}, 140 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)}, 141 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])}, 142 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])}, 143 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])}, 144 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])}, 145 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])}, 146 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])}, 147 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])}, 148 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])}, 149 }; 150 151 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \ 152 sizeof(rte_virtio_rxq_stat_strings[0])) 153 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \ 154 sizeof(rte_virtio_txq_stat_strings[0])) 155 156 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS]; 157 158 static int 159 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, 160 int *dlen, int pkt_num) 161 { 162 uint32_t head, i; 163 int k, sum = 0; 164 virtio_net_ctrl_ack status = ~0; 165 struct virtio_pmd_ctrl result; 166 struct virtqueue *vq; 167 168 ctrl->status = status; 169 170 if (!cvq || !cvq->vq) { 171 PMD_INIT_LOG(ERR, "Control queue is not supported."); 172 return -1; 173 } 174 vq = cvq->vq; 175 head = vq->vq_desc_head_idx; 176 177 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, " 178 "vq->hw->cvq = %p vq = %p", 179 vq->vq_desc_head_idx, status, vq->hw->cvq, vq); 180 181 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1)) 182 return -1; 183 184 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl, 185 sizeof(struct virtio_pmd_ctrl)); 186 187 /* 188 * Format is enforced in qemu code: 189 * One TX packet for header; 190 * At least one TX packet per argument; 191 * One RX packet for ACK. 192 */ 193 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT; 194 vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem; 195 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr); 196 vq->vq_free_cnt--; 197 i = vq->vq_ring.desc[head].next; 198 199 for (k = 0; k < pkt_num; k++) { 200 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT; 201 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 202 + sizeof(struct virtio_net_ctrl_hdr) 203 + sizeof(ctrl->status) + sizeof(uint8_t)*sum; 204 vq->vq_ring.desc[i].len = dlen[k]; 205 sum += dlen[k]; 206 vq->vq_free_cnt--; 207 i = vq->vq_ring.desc[i].next; 208 } 209 210 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE; 211 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 212 + sizeof(struct virtio_net_ctrl_hdr); 213 vq->vq_ring.desc[i].len = sizeof(ctrl->status); 214 vq->vq_free_cnt--; 215 216 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next; 217 218 vq_update_avail_ring(vq, head); 219 vq_update_avail_idx(vq); 220 221 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index); 222 223 virtqueue_notify(vq); 224 225 rte_rmb(); 226 while (VIRTQUEUE_NUSED(vq) == 0) { 227 rte_rmb(); 228 usleep(100); 229 } 230 231 while (VIRTQUEUE_NUSED(vq)) { 232 uint32_t idx, desc_idx, used_idx; 233 struct vring_used_elem *uep; 234 235 used_idx = (uint32_t)(vq->vq_used_cons_idx 236 & (vq->vq_nentries - 1)); 237 uep = &vq->vq_ring.used->ring[used_idx]; 238 idx = (uint32_t) uep->id; 239 desc_idx = idx; 240 241 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) { 242 desc_idx = vq->vq_ring.desc[desc_idx].next; 243 vq->vq_free_cnt++; 244 } 245 246 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx; 247 vq->vq_desc_head_idx = idx; 248 249 vq->vq_used_cons_idx++; 250 vq->vq_free_cnt++; 251 } 252 253 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d", 254 vq->vq_free_cnt, vq->vq_desc_head_idx); 255 256 memcpy(&result, cvq->virtio_net_hdr_mz->addr, 257 sizeof(struct virtio_pmd_ctrl)); 258 259 return result.status; 260 } 261 262 static int 263 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues) 264 { 265 struct virtio_hw *hw = dev->data->dev_private; 266 struct virtio_pmd_ctrl ctrl; 267 int dlen[1]; 268 int ret; 269 270 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ; 271 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET; 272 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t)); 273 274 dlen[0] = sizeof(uint16_t); 275 276 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 277 if (ret) { 278 PMD_INIT_LOG(ERR, "Multiqueue configured but send command " 279 "failed, this is too late now..."); 280 return -EINVAL; 281 } 282 283 return 0; 284 } 285 286 static void 287 virtio_dev_queue_release(void *queue __rte_unused) 288 { 289 /* do nothing */ 290 } 291 292 static int 293 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx) 294 { 295 if (vtpci_queue_idx == hw->max_queue_pairs * 2) 296 return VTNET_CQ; 297 else if (vtpci_queue_idx % 2 == 0) 298 return VTNET_RQ; 299 else 300 return VTNET_TQ; 301 } 302 303 static uint16_t 304 virtio_get_nr_vq(struct virtio_hw *hw) 305 { 306 uint16_t nr_vq = hw->max_queue_pairs * 2; 307 308 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 309 nr_vq += 1; 310 311 return nr_vq; 312 } 313 314 static void 315 virtio_init_vring(struct virtqueue *vq) 316 { 317 int size = vq->vq_nentries; 318 struct vring *vr = &vq->vq_ring; 319 uint8_t *ring_mem = vq->vq_ring_virt_mem; 320 321 PMD_INIT_FUNC_TRACE(); 322 323 /* 324 * Reinitialise since virtio port might have been stopped and restarted 325 */ 326 memset(ring_mem, 0, vq->vq_ring_size); 327 vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN); 328 vq->vq_used_cons_idx = 0; 329 vq->vq_desc_head_idx = 0; 330 vq->vq_avail_idx = 0; 331 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1); 332 vq->vq_free_cnt = vq->vq_nentries; 333 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries); 334 335 vring_desc_init(vr->desc, size); 336 337 /* 338 * Disable device(host) interrupting guest 339 */ 340 virtqueue_disable_intr(vq); 341 } 342 343 static int 344 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) 345 { 346 char vq_name[VIRTQUEUE_MAX_NAME_SZ]; 347 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ]; 348 const struct rte_memzone *mz = NULL, *hdr_mz = NULL; 349 unsigned int vq_size, size; 350 struct virtio_hw *hw = dev->data->dev_private; 351 struct virtnet_rx *rxvq = NULL; 352 struct virtnet_tx *txvq = NULL; 353 struct virtnet_ctl *cvq = NULL; 354 struct virtqueue *vq; 355 size_t sz_hdr_mz = 0; 356 void *sw_ring = NULL; 357 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx); 358 int ret; 359 360 PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx); 361 362 /* 363 * Read the virtqueue size from the Queue Size field 364 * Always power of 2 and if 0 virtqueue does not exist 365 */ 366 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx); 367 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size); 368 if (vq_size == 0) { 369 PMD_INIT_LOG(ERR, "virtqueue does not exist"); 370 return -EINVAL; 371 } 372 373 if (!rte_is_power_of_2(vq_size)) { 374 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2"); 375 return -EINVAL; 376 } 377 378 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d", 379 dev->data->port_id, vtpci_queue_idx); 380 381 size = RTE_ALIGN_CEIL(sizeof(*vq) + 382 vq_size * sizeof(struct vq_desc_extra), 383 RTE_CACHE_LINE_SIZE); 384 if (queue_type == VTNET_TQ) { 385 /* 386 * For each xmit packet, allocate a virtio_net_hdr 387 * and indirect ring elements 388 */ 389 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region); 390 } else if (queue_type == VTNET_CQ) { 391 /* Allocate a page for control vq command, data and status */ 392 sz_hdr_mz = PAGE_SIZE; 393 } 394 395 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE, 396 SOCKET_ID_ANY); 397 if (vq == NULL) { 398 PMD_INIT_LOG(ERR, "can not allocate vq"); 399 return -ENOMEM; 400 } 401 hw->vqs[vtpci_queue_idx] = vq; 402 403 vq->hw = hw; 404 vq->vq_queue_index = vtpci_queue_idx; 405 vq->vq_nentries = vq_size; 406 407 /* 408 * Reserve a memzone for vring elements 409 */ 410 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN); 411 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN); 412 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", 413 size, vq->vq_ring_size); 414 415 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, 416 SOCKET_ID_ANY, 417 0, VIRTIO_PCI_VRING_ALIGN); 418 if (mz == NULL) { 419 if (rte_errno == EEXIST) 420 mz = rte_memzone_lookup(vq_name); 421 if (mz == NULL) { 422 ret = -ENOMEM; 423 goto fail_q_alloc; 424 } 425 } 426 427 memset(mz->addr, 0, mz->len); 428 429 vq->vq_ring_mem = mz->phys_addr; 430 vq->vq_ring_virt_mem = mz->addr; 431 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64, 432 (uint64_t)mz->phys_addr); 433 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64, 434 (uint64_t)(uintptr_t)mz->addr); 435 436 virtio_init_vring(vq); 437 438 if (sz_hdr_mz) { 439 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr", 440 dev->data->port_id, vtpci_queue_idx); 441 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz, 442 SOCKET_ID_ANY, 0, 443 RTE_CACHE_LINE_SIZE); 444 if (hdr_mz == NULL) { 445 if (rte_errno == EEXIST) 446 hdr_mz = rte_memzone_lookup(vq_hdr_name); 447 if (hdr_mz == NULL) { 448 ret = -ENOMEM; 449 goto fail_q_alloc; 450 } 451 } 452 } 453 454 if (queue_type == VTNET_RQ) { 455 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) * 456 sizeof(vq->sw_ring[0]); 457 458 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw, 459 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY); 460 if (!sw_ring) { 461 PMD_INIT_LOG(ERR, "can not allocate RX soft ring"); 462 ret = -ENOMEM; 463 goto fail_q_alloc; 464 } 465 466 vq->sw_ring = sw_ring; 467 rxvq = &vq->rxq; 468 rxvq->vq = vq; 469 rxvq->port_id = dev->data->port_id; 470 rxvq->mz = mz; 471 } else if (queue_type == VTNET_TQ) { 472 txvq = &vq->txq; 473 txvq->vq = vq; 474 txvq->port_id = dev->data->port_id; 475 txvq->mz = mz; 476 txvq->virtio_net_hdr_mz = hdr_mz; 477 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr; 478 } else if (queue_type == VTNET_CQ) { 479 cvq = &vq->cq; 480 cvq->vq = vq; 481 cvq->mz = mz; 482 cvq->virtio_net_hdr_mz = hdr_mz; 483 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr; 484 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE); 485 486 hw->cvq = cvq; 487 } 488 489 /* For virtio_user case (that is when hw->dev is NULL), we use 490 * virtual address. And we need properly set _offset_, please see 491 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information. 492 */ 493 if (!hw->virtio_user_dev) 494 vq->offset = offsetof(struct rte_mbuf, buf_physaddr); 495 else { 496 vq->vq_ring_mem = (uintptr_t)mz->addr; 497 vq->offset = offsetof(struct rte_mbuf, buf_addr); 498 if (queue_type == VTNET_TQ) 499 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 500 else if (queue_type == VTNET_CQ) 501 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 502 } 503 504 if (queue_type == VTNET_TQ) { 505 struct virtio_tx_region *txr; 506 unsigned int i; 507 508 txr = hdr_mz->addr; 509 memset(txr, 0, vq_size * sizeof(*txr)); 510 for (i = 0; i < vq_size; i++) { 511 struct vring_desc *start_dp = txr[i].tx_indir; 512 513 vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir)); 514 515 /* first indirect descriptor is always the tx header */ 516 start_dp->addr = txvq->virtio_net_hdr_mem 517 + i * sizeof(*txr) 518 + offsetof(struct virtio_tx_region, tx_hdr); 519 520 start_dp->len = hw->vtnet_hdr_size; 521 start_dp->flags = VRING_DESC_F_NEXT; 522 } 523 } 524 525 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) { 526 PMD_INIT_LOG(ERR, "setup_queue failed"); 527 return -EINVAL; 528 } 529 530 return 0; 531 532 fail_q_alloc: 533 rte_free(sw_ring); 534 rte_memzone_free(hdr_mz); 535 rte_memzone_free(mz); 536 rte_free(vq); 537 538 return ret; 539 } 540 541 static void 542 virtio_free_queues(struct virtio_hw *hw) 543 { 544 uint16_t nr_vq = virtio_get_nr_vq(hw); 545 struct virtqueue *vq; 546 int queue_type; 547 uint16_t i; 548 549 if (hw->vqs == NULL) 550 return; 551 552 for (i = 0; i < nr_vq; i++) { 553 vq = hw->vqs[i]; 554 if (!vq) 555 continue; 556 557 queue_type = virtio_get_queue_type(hw, i); 558 if (queue_type == VTNET_RQ) { 559 rte_free(vq->sw_ring); 560 rte_memzone_free(vq->rxq.mz); 561 } else if (queue_type == VTNET_TQ) { 562 rte_memzone_free(vq->txq.mz); 563 rte_memzone_free(vq->txq.virtio_net_hdr_mz); 564 } else { 565 rte_memzone_free(vq->cq.mz); 566 rte_memzone_free(vq->cq.virtio_net_hdr_mz); 567 } 568 569 rte_free(vq); 570 hw->vqs[i] = NULL; 571 } 572 573 rte_free(hw->vqs); 574 hw->vqs = NULL; 575 } 576 577 static int 578 virtio_alloc_queues(struct rte_eth_dev *dev) 579 { 580 struct virtio_hw *hw = dev->data->dev_private; 581 uint16_t nr_vq = virtio_get_nr_vq(hw); 582 uint16_t i; 583 int ret; 584 585 hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0); 586 if (!hw->vqs) { 587 PMD_INIT_LOG(ERR, "failed to allocate vqs"); 588 return -ENOMEM; 589 } 590 591 for (i = 0; i < nr_vq; i++) { 592 ret = virtio_init_queue(dev, i); 593 if (ret < 0) { 594 virtio_free_queues(hw); 595 return ret; 596 } 597 } 598 599 return 0; 600 } 601 602 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev); 603 604 static void 605 virtio_dev_close(struct rte_eth_dev *dev) 606 { 607 struct virtio_hw *hw = dev->data->dev_private; 608 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; 609 610 PMD_INIT_LOG(DEBUG, "virtio_dev_close"); 611 612 /* reset the NIC */ 613 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 614 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR); 615 if (intr_conf->rxq) 616 virtio_queues_unbind_intr(dev); 617 618 if (intr_conf->lsc || intr_conf->rxq) { 619 rte_intr_disable(dev->intr_handle); 620 rte_intr_efd_disable(dev->intr_handle); 621 rte_free(dev->intr_handle->intr_vec); 622 dev->intr_handle->intr_vec = NULL; 623 } 624 625 vtpci_reset(hw); 626 virtio_dev_free_mbufs(dev); 627 virtio_free_queues(hw); 628 } 629 630 static void 631 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev) 632 { 633 struct virtio_hw *hw = dev->data->dev_private; 634 struct virtio_pmd_ctrl ctrl; 635 int dlen[1]; 636 int ret; 637 638 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 639 PMD_INIT_LOG(INFO, "host does not support rx control"); 640 return; 641 } 642 643 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 644 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 645 ctrl.data[0] = 1; 646 dlen[0] = 1; 647 648 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 649 if (ret) 650 PMD_INIT_LOG(ERR, "Failed to enable promisc"); 651 } 652 653 static void 654 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev) 655 { 656 struct virtio_hw *hw = dev->data->dev_private; 657 struct virtio_pmd_ctrl ctrl; 658 int dlen[1]; 659 int ret; 660 661 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 662 PMD_INIT_LOG(INFO, "host does not support rx control"); 663 return; 664 } 665 666 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 667 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 668 ctrl.data[0] = 0; 669 dlen[0] = 1; 670 671 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 672 if (ret) 673 PMD_INIT_LOG(ERR, "Failed to disable promisc"); 674 } 675 676 static void 677 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev) 678 { 679 struct virtio_hw *hw = dev->data->dev_private; 680 struct virtio_pmd_ctrl ctrl; 681 int dlen[1]; 682 int ret; 683 684 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 685 PMD_INIT_LOG(INFO, "host does not support rx control"); 686 return; 687 } 688 689 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 690 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 691 ctrl.data[0] = 1; 692 dlen[0] = 1; 693 694 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 695 if (ret) 696 PMD_INIT_LOG(ERR, "Failed to enable allmulticast"); 697 } 698 699 static void 700 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev) 701 { 702 struct virtio_hw *hw = dev->data->dev_private; 703 struct virtio_pmd_ctrl ctrl; 704 int dlen[1]; 705 int ret; 706 707 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 708 PMD_INIT_LOG(INFO, "host does not support rx control"); 709 return; 710 } 711 712 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 713 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 714 ctrl.data[0] = 0; 715 dlen[0] = 1; 716 717 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 718 if (ret) 719 PMD_INIT_LOG(ERR, "Failed to disable allmulticast"); 720 } 721 722 #define VLAN_TAG_LEN 4 /* 802.3ac tag (not DMA'd) */ 723 static int 724 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) 725 { 726 struct virtio_hw *hw = dev->data->dev_private; 727 uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN + 728 hw->vtnet_hdr_size; 729 uint32_t frame_size = mtu + ether_hdr_len; 730 uint32_t max_frame_size = hw->max_mtu + ether_hdr_len; 731 732 max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN); 733 734 if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) { 735 PMD_INIT_LOG(ERR, "MTU should be between %d and %d", 736 ETHER_MIN_MTU, max_frame_size - ether_hdr_len); 737 return -EINVAL; 738 } 739 return 0; 740 } 741 742 static int 743 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id) 744 { 745 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; 746 struct virtqueue *vq = rxvq->vq; 747 748 virtqueue_enable_intr(vq); 749 return 0; 750 } 751 752 static int 753 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id) 754 { 755 struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id]; 756 struct virtqueue *vq = rxvq->vq; 757 758 virtqueue_disable_intr(vq); 759 return 0; 760 } 761 762 /* 763 * dev_ops for virtio, bare necessities for basic operation 764 */ 765 static const struct eth_dev_ops virtio_eth_dev_ops = { 766 .dev_configure = virtio_dev_configure, 767 .dev_start = virtio_dev_start, 768 .dev_stop = virtio_dev_stop, 769 .dev_close = virtio_dev_close, 770 .promiscuous_enable = virtio_dev_promiscuous_enable, 771 .promiscuous_disable = virtio_dev_promiscuous_disable, 772 .allmulticast_enable = virtio_dev_allmulticast_enable, 773 .allmulticast_disable = virtio_dev_allmulticast_disable, 774 .mtu_set = virtio_mtu_set, 775 .dev_infos_get = virtio_dev_info_get, 776 .stats_get = virtio_dev_stats_get, 777 .xstats_get = virtio_dev_xstats_get, 778 .xstats_get_names = virtio_dev_xstats_get_names, 779 .stats_reset = virtio_dev_stats_reset, 780 .xstats_reset = virtio_dev_stats_reset, 781 .link_update = virtio_dev_link_update, 782 .rx_queue_setup = virtio_dev_rx_queue_setup, 783 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable, 784 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable, 785 .rx_queue_release = virtio_dev_queue_release, 786 .rx_descriptor_done = virtio_dev_rx_queue_done, 787 .tx_queue_setup = virtio_dev_tx_queue_setup, 788 .tx_queue_release = virtio_dev_queue_release, 789 /* collect stats per queue */ 790 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set, 791 .vlan_filter_set = virtio_vlan_filter_set, 792 .mac_addr_add = virtio_mac_addr_add, 793 .mac_addr_remove = virtio_mac_addr_remove, 794 .mac_addr_set = virtio_mac_addr_set, 795 }; 796 797 static inline int 798 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev, 799 struct rte_eth_link *link) 800 { 801 struct rte_eth_link *dst = link; 802 struct rte_eth_link *src = &(dev->data->dev_link); 803 804 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 805 *(uint64_t *)src) == 0) 806 return -1; 807 808 return 0; 809 } 810 811 /** 812 * Atomically writes the link status information into global 813 * structure rte_eth_dev. 814 * 815 * @param dev 816 * - Pointer to the structure rte_eth_dev to read from. 817 * - Pointer to the buffer to be saved with the link status. 818 * 819 * @return 820 * - On success, zero. 821 * - On failure, negative value. 822 */ 823 static inline int 824 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev, 825 struct rte_eth_link *link) 826 { 827 struct rte_eth_link *dst = &(dev->data->dev_link); 828 struct rte_eth_link *src = link; 829 830 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 831 *(uint64_t *)src) == 0) 832 return -1; 833 834 return 0; 835 } 836 837 static void 838 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 839 { 840 unsigned i; 841 842 for (i = 0; i < dev->data->nb_tx_queues; i++) { 843 const struct virtnet_tx *txvq = dev->data->tx_queues[i]; 844 if (txvq == NULL) 845 continue; 846 847 stats->opackets += txvq->stats.packets; 848 stats->obytes += txvq->stats.bytes; 849 stats->oerrors += txvq->stats.errors; 850 851 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 852 stats->q_opackets[i] = txvq->stats.packets; 853 stats->q_obytes[i] = txvq->stats.bytes; 854 } 855 } 856 857 for (i = 0; i < dev->data->nb_rx_queues; i++) { 858 const struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 859 if (rxvq == NULL) 860 continue; 861 862 stats->ipackets += rxvq->stats.packets; 863 stats->ibytes += rxvq->stats.bytes; 864 stats->ierrors += rxvq->stats.errors; 865 866 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 867 stats->q_ipackets[i] = rxvq->stats.packets; 868 stats->q_ibytes[i] = rxvq->stats.bytes; 869 } 870 } 871 872 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed; 873 } 874 875 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev, 876 struct rte_eth_xstat_name *xstats_names, 877 __rte_unused unsigned limit) 878 { 879 unsigned i; 880 unsigned count = 0; 881 unsigned t; 882 883 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 884 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 885 886 if (xstats_names != NULL) { 887 /* Note: limit checked in rte_eth_xstats_names() */ 888 889 for (i = 0; i < dev->data->nb_rx_queues; i++) { 890 struct virtqueue *rxvq = dev->data->rx_queues[i]; 891 if (rxvq == NULL) 892 continue; 893 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 894 snprintf(xstats_names[count].name, 895 sizeof(xstats_names[count].name), 896 "rx_q%u_%s", i, 897 rte_virtio_rxq_stat_strings[t].name); 898 count++; 899 } 900 } 901 902 for (i = 0; i < dev->data->nb_tx_queues; i++) { 903 struct virtqueue *txvq = dev->data->tx_queues[i]; 904 if (txvq == NULL) 905 continue; 906 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 907 snprintf(xstats_names[count].name, 908 sizeof(xstats_names[count].name), 909 "tx_q%u_%s", i, 910 rte_virtio_txq_stat_strings[t].name); 911 count++; 912 } 913 } 914 return count; 915 } 916 return nstats; 917 } 918 919 static int 920 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats, 921 unsigned n) 922 { 923 unsigned i; 924 unsigned count = 0; 925 926 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 927 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 928 929 if (n < nstats) 930 return nstats; 931 932 for (i = 0; i < dev->data->nb_rx_queues; i++) { 933 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 934 935 if (rxvq == NULL) 936 continue; 937 938 unsigned t; 939 940 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 941 xstats[count].value = *(uint64_t *)(((char *)rxvq) + 942 rte_virtio_rxq_stat_strings[t].offset); 943 xstats[count].id = count; 944 count++; 945 } 946 } 947 948 for (i = 0; i < dev->data->nb_tx_queues; i++) { 949 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 950 951 if (txvq == NULL) 952 continue; 953 954 unsigned t; 955 956 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 957 xstats[count].value = *(uint64_t *)(((char *)txvq) + 958 rte_virtio_txq_stat_strings[t].offset); 959 xstats[count].id = count; 960 count++; 961 } 962 } 963 964 return count; 965 } 966 967 static void 968 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 969 { 970 virtio_update_stats(dev, stats); 971 } 972 973 static void 974 virtio_dev_stats_reset(struct rte_eth_dev *dev) 975 { 976 unsigned int i; 977 978 for (i = 0; i < dev->data->nb_tx_queues; i++) { 979 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 980 if (txvq == NULL) 981 continue; 982 983 txvq->stats.packets = 0; 984 txvq->stats.bytes = 0; 985 txvq->stats.errors = 0; 986 txvq->stats.multicast = 0; 987 txvq->stats.broadcast = 0; 988 memset(txvq->stats.size_bins, 0, 989 sizeof(txvq->stats.size_bins[0]) * 8); 990 } 991 992 for (i = 0; i < dev->data->nb_rx_queues; i++) { 993 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 994 if (rxvq == NULL) 995 continue; 996 997 rxvq->stats.packets = 0; 998 rxvq->stats.bytes = 0; 999 rxvq->stats.errors = 0; 1000 rxvq->stats.multicast = 0; 1001 rxvq->stats.broadcast = 0; 1002 memset(rxvq->stats.size_bins, 0, 1003 sizeof(rxvq->stats.size_bins[0]) * 8); 1004 } 1005 } 1006 1007 static void 1008 virtio_set_hwaddr(struct virtio_hw *hw) 1009 { 1010 vtpci_write_dev_config(hw, 1011 offsetof(struct virtio_net_config, mac), 1012 &hw->mac_addr, ETHER_ADDR_LEN); 1013 } 1014 1015 static void 1016 virtio_get_hwaddr(struct virtio_hw *hw) 1017 { 1018 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) { 1019 vtpci_read_dev_config(hw, 1020 offsetof(struct virtio_net_config, mac), 1021 &hw->mac_addr, ETHER_ADDR_LEN); 1022 } else { 1023 eth_random_addr(&hw->mac_addr[0]); 1024 virtio_set_hwaddr(hw); 1025 } 1026 } 1027 1028 static int 1029 virtio_mac_table_set(struct virtio_hw *hw, 1030 const struct virtio_net_ctrl_mac *uc, 1031 const struct virtio_net_ctrl_mac *mc) 1032 { 1033 struct virtio_pmd_ctrl ctrl; 1034 int err, len[2]; 1035 1036 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 1037 PMD_DRV_LOG(INFO, "host does not support mac table"); 1038 return -1; 1039 } 1040 1041 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1042 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 1043 1044 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries); 1045 memcpy(ctrl.data, uc, len[0]); 1046 1047 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries); 1048 memcpy(ctrl.data + len[0], mc, len[1]); 1049 1050 err = virtio_send_command(hw->cvq, &ctrl, len, 2); 1051 if (err != 0) 1052 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err); 1053 return err; 1054 } 1055 1056 static int 1057 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr, 1058 uint32_t index, uint32_t vmdq __rte_unused) 1059 { 1060 struct virtio_hw *hw = dev->data->dev_private; 1061 const struct ether_addr *addrs = dev->data->mac_addrs; 1062 unsigned int i; 1063 struct virtio_net_ctrl_mac *uc, *mc; 1064 1065 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1066 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1067 return -EINVAL; 1068 } 1069 1070 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1071 uc->entries = 0; 1072 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1073 mc->entries = 0; 1074 1075 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1076 const struct ether_addr *addr 1077 = (i == index) ? mac_addr : addrs + i; 1078 struct virtio_net_ctrl_mac *tbl 1079 = is_multicast_ether_addr(addr) ? mc : uc; 1080 1081 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN); 1082 } 1083 1084 return virtio_mac_table_set(hw, uc, mc); 1085 } 1086 1087 static void 1088 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index) 1089 { 1090 struct virtio_hw *hw = dev->data->dev_private; 1091 struct ether_addr *addrs = dev->data->mac_addrs; 1092 struct virtio_net_ctrl_mac *uc, *mc; 1093 unsigned int i; 1094 1095 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1096 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1097 return; 1098 } 1099 1100 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1101 uc->entries = 0; 1102 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1103 mc->entries = 0; 1104 1105 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1106 struct virtio_net_ctrl_mac *tbl; 1107 1108 if (i == index || is_zero_ether_addr(addrs + i)) 1109 continue; 1110 1111 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc; 1112 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN); 1113 } 1114 1115 virtio_mac_table_set(hw, uc, mc); 1116 } 1117 1118 static void 1119 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr) 1120 { 1121 struct virtio_hw *hw = dev->data->dev_private; 1122 1123 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN); 1124 1125 /* Use atomic update if available */ 1126 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 1127 struct virtio_pmd_ctrl ctrl; 1128 int len = ETHER_ADDR_LEN; 1129 1130 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1131 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; 1132 1133 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN); 1134 virtio_send_command(hw->cvq, &ctrl, &len, 1); 1135 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) 1136 virtio_set_hwaddr(hw); 1137 } 1138 1139 static int 1140 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 1141 { 1142 struct virtio_hw *hw = dev->data->dev_private; 1143 struct virtio_pmd_ctrl ctrl; 1144 int len; 1145 1146 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) 1147 return -ENOTSUP; 1148 1149 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN; 1150 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; 1151 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id)); 1152 len = sizeof(vlan_id); 1153 1154 return virtio_send_command(hw->cvq, &ctrl, &len, 1); 1155 } 1156 1157 static int 1158 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features) 1159 { 1160 uint64_t host_features; 1161 1162 /* Prepare guest_features: feature that driver wants to support */ 1163 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64, 1164 req_features); 1165 1166 /* Read device(host) feature bits */ 1167 host_features = VTPCI_OPS(hw)->get_features(hw); 1168 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64, 1169 host_features); 1170 1171 /* If supported, ensure MTU value is valid before acknowledging it. */ 1172 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) { 1173 struct virtio_net_config config; 1174 1175 vtpci_read_dev_config(hw, 1176 offsetof(struct virtio_net_config, mtu), 1177 &config.mtu, sizeof(config.mtu)); 1178 1179 if (config.mtu < ETHER_MIN_MTU) 1180 req_features &= ~(1ULL << VIRTIO_NET_F_MTU); 1181 } 1182 1183 /* 1184 * Negotiate features: Subset of device feature bits are written back 1185 * guest feature bits. 1186 */ 1187 hw->guest_features = req_features; 1188 hw->guest_features = vtpci_negotiate_features(hw, host_features); 1189 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64, 1190 hw->guest_features); 1191 1192 if (hw->modern) { 1193 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) { 1194 PMD_INIT_LOG(ERR, 1195 "VIRTIO_F_VERSION_1 features is not enabled."); 1196 return -1; 1197 } 1198 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK); 1199 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) { 1200 PMD_INIT_LOG(ERR, 1201 "failed to set FEATURES_OK status!"); 1202 return -1; 1203 } 1204 } 1205 1206 hw->req_guest_features = req_features; 1207 1208 return 0; 1209 } 1210 1211 /* 1212 * Process Virtio Config changed interrupt and call the callback 1213 * if link state changed. 1214 */ 1215 void 1216 virtio_interrupt_handler(void *param) 1217 { 1218 struct rte_eth_dev *dev = param; 1219 struct virtio_hw *hw = dev->data->dev_private; 1220 uint8_t isr; 1221 1222 /* Read interrupt status which clears interrupt */ 1223 isr = vtpci_isr(hw); 1224 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr); 1225 1226 if (rte_intr_enable(dev->intr_handle) < 0) 1227 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1228 1229 if (isr & VIRTIO_PCI_ISR_CONFIG) { 1230 if (virtio_dev_link_update(dev, 0) == 0) 1231 _rte_eth_dev_callback_process(dev, 1232 RTE_ETH_EVENT_INTR_LSC, 1233 NULL, NULL); 1234 } 1235 1236 } 1237 1238 static void 1239 rx_func_get(struct rte_eth_dev *eth_dev) 1240 { 1241 struct virtio_hw *hw = eth_dev->data->dev_private; 1242 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) 1243 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts; 1244 else 1245 eth_dev->rx_pkt_burst = &virtio_recv_pkts; 1246 } 1247 1248 /* Only support 1:1 queue/interrupt mapping so far. 1249 * TODO: support n:1 queue/interrupt mapping when there are limited number of 1250 * interrupt vectors (<N+1). 1251 */ 1252 static int 1253 virtio_queues_bind_intr(struct rte_eth_dev *dev) 1254 { 1255 uint32_t i; 1256 struct virtio_hw *hw = dev->data->dev_private; 1257 1258 PMD_INIT_LOG(INFO, "queue/interrupt binding"); 1259 for (i = 0; i < dev->data->nb_rx_queues; ++i) { 1260 dev->intr_handle->intr_vec[i] = i + 1; 1261 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) == 1262 VIRTIO_MSI_NO_VECTOR) { 1263 PMD_DRV_LOG(ERR, "failed to set queue vector"); 1264 return -EBUSY; 1265 } 1266 } 1267 1268 return 0; 1269 } 1270 1271 static void 1272 virtio_queues_unbind_intr(struct rte_eth_dev *dev) 1273 { 1274 uint32_t i; 1275 struct virtio_hw *hw = dev->data->dev_private; 1276 1277 PMD_INIT_LOG(INFO, "queue/interrupt unbinding"); 1278 for (i = 0; i < dev->data->nb_rx_queues; ++i) 1279 VTPCI_OPS(hw)->set_queue_irq(hw, 1280 hw->vqs[i * VTNET_CQ], 1281 VIRTIO_MSI_NO_VECTOR); 1282 } 1283 1284 static int 1285 virtio_configure_intr(struct rte_eth_dev *dev) 1286 { 1287 struct virtio_hw *hw = dev->data->dev_private; 1288 1289 if (!rte_intr_cap_multiple(dev->intr_handle)) { 1290 PMD_INIT_LOG(ERR, "Multiple intr vector not supported"); 1291 return -ENOTSUP; 1292 } 1293 1294 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) { 1295 PMD_INIT_LOG(ERR, "Fail to create eventfd"); 1296 return -1; 1297 } 1298 1299 if (!dev->intr_handle->intr_vec) { 1300 dev->intr_handle->intr_vec = 1301 rte_zmalloc("intr_vec", 1302 hw->max_queue_pairs * sizeof(int), 0); 1303 if (!dev->intr_handle->intr_vec) { 1304 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors", 1305 hw->max_queue_pairs); 1306 return -ENOMEM; 1307 } 1308 } 1309 1310 /* Re-register callback to update max_intr */ 1311 rte_intr_callback_unregister(dev->intr_handle, 1312 virtio_interrupt_handler, 1313 dev); 1314 rte_intr_callback_register(dev->intr_handle, 1315 virtio_interrupt_handler, 1316 dev); 1317 1318 /* DO NOT try to remove this! This function will enable msix, or QEMU 1319 * will encounter SIGSEGV when DRIVER_OK is sent. 1320 * And for legacy devices, this should be done before queue/vec binding 1321 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR 1322 * (22) will be ignored. 1323 */ 1324 if (rte_intr_enable(dev->intr_handle) < 0) { 1325 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1326 return -1; 1327 } 1328 1329 if (virtio_queues_bind_intr(dev) < 0) { 1330 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt"); 1331 return -1; 1332 } 1333 1334 return 0; 1335 } 1336 1337 /* reset device and renegotiate features if needed */ 1338 static int 1339 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) 1340 { 1341 struct virtio_hw *hw = eth_dev->data->dev_private; 1342 struct virtio_net_config *config; 1343 struct virtio_net_config local_config; 1344 struct rte_pci_device *pci_dev = NULL; 1345 int ret; 1346 1347 /* Reset the device although not necessary at startup */ 1348 vtpci_reset(hw); 1349 1350 /* Tell the host we've noticed this device. */ 1351 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK); 1352 1353 /* Tell the host we've known how to drive the device. */ 1354 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER); 1355 if (virtio_negotiate_features(hw, req_features) < 0) 1356 return -1; 1357 1358 if (!hw->virtio_user_dev) { 1359 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev); 1360 rte_eth_copy_pci_info(eth_dev, pci_dev); 1361 } 1362 1363 eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE; 1364 /* If host does not support both status and MSI-X then disable LSC */ 1365 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix) 1366 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC; 1367 else 1368 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC; 1369 1370 rx_func_get(eth_dev); 1371 1372 /* Setting up rx_header size for the device */ 1373 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || 1374 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) 1375 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); 1376 else 1377 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr); 1378 1379 /* Copy the permanent MAC address to: virtio_hw */ 1380 virtio_get_hwaddr(hw); 1381 ether_addr_copy((struct ether_addr *) hw->mac_addr, 1382 ð_dev->data->mac_addrs[0]); 1383 PMD_INIT_LOG(DEBUG, 1384 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1385 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2], 1386 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]); 1387 1388 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) { 1389 config = &local_config; 1390 1391 vtpci_read_dev_config(hw, 1392 offsetof(struct virtio_net_config, mac), 1393 &config->mac, sizeof(config->mac)); 1394 1395 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1396 vtpci_read_dev_config(hw, 1397 offsetof(struct virtio_net_config, status), 1398 &config->status, sizeof(config->status)); 1399 } else { 1400 PMD_INIT_LOG(DEBUG, 1401 "VIRTIO_NET_F_STATUS is not supported"); 1402 config->status = 0; 1403 } 1404 1405 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) { 1406 vtpci_read_dev_config(hw, 1407 offsetof(struct virtio_net_config, max_virtqueue_pairs), 1408 &config->max_virtqueue_pairs, 1409 sizeof(config->max_virtqueue_pairs)); 1410 } else { 1411 PMD_INIT_LOG(DEBUG, 1412 "VIRTIO_NET_F_MQ is not supported"); 1413 config->max_virtqueue_pairs = 1; 1414 } 1415 1416 hw->max_queue_pairs = config->max_virtqueue_pairs; 1417 1418 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) { 1419 vtpci_read_dev_config(hw, 1420 offsetof(struct virtio_net_config, mtu), 1421 &config->mtu, 1422 sizeof(config->mtu)); 1423 1424 /* 1425 * MTU value has already been checked at negotiation 1426 * time, but check again in case it has changed since 1427 * then, which should not happen. 1428 */ 1429 if (config->mtu < ETHER_MIN_MTU) { 1430 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)", 1431 config->mtu); 1432 return -1; 1433 } 1434 1435 hw->max_mtu = config->mtu; 1436 /* Set initial MTU to maximum one supported by vhost */ 1437 eth_dev->data->mtu = config->mtu; 1438 1439 } else { 1440 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN - 1441 VLAN_TAG_LEN - hw->vtnet_hdr_size; 1442 } 1443 1444 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d", 1445 config->max_virtqueue_pairs); 1446 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status); 1447 PMD_INIT_LOG(DEBUG, 1448 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1449 config->mac[0], config->mac[1], 1450 config->mac[2], config->mac[3], 1451 config->mac[4], config->mac[5]); 1452 } else { 1453 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1"); 1454 hw->max_queue_pairs = 1; 1455 } 1456 1457 ret = virtio_alloc_queues(eth_dev); 1458 if (ret < 0) 1459 return ret; 1460 1461 if (eth_dev->data->dev_conf.intr_conf.rxq) { 1462 if (virtio_configure_intr(eth_dev) < 0) { 1463 PMD_INIT_LOG(ERR, "failed to configure interrupt"); 1464 return -1; 1465 } 1466 } 1467 1468 vtpci_reinit_complete(hw); 1469 1470 if (pci_dev) 1471 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 1472 eth_dev->data->port_id, pci_dev->id.vendor_id, 1473 pci_dev->id.device_id); 1474 1475 return 0; 1476 } 1477 1478 /* 1479 * Remap the PCI device again (IO port map for legacy device and 1480 * memory map for modern device), so that the secondary process 1481 * could have the PCI initiated correctly. 1482 */ 1483 static int 1484 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw) 1485 { 1486 if (hw->modern) { 1487 /* 1488 * We don't have to re-parse the PCI config space, since 1489 * rte_pci_map_device() makes sure the mapped address 1490 * in secondary process would equal to the one mapped in 1491 * the primary process: error will be returned if that 1492 * requirement is not met. 1493 * 1494 * That said, we could simply reuse all cap pointers 1495 * (such as dev_cfg, common_cfg, etc.) parsed from the 1496 * primary process, which is stored in shared memory. 1497 */ 1498 if (rte_pci_map_device(pci_dev)) { 1499 PMD_INIT_LOG(DEBUG, "failed to map pci device!"); 1500 return -1; 1501 } 1502 } else { 1503 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0) 1504 return -1; 1505 } 1506 1507 return 0; 1508 } 1509 1510 static void 1511 virtio_set_vtpci_ops(struct virtio_hw *hw) 1512 { 1513 #ifdef RTE_VIRTIO_USER 1514 if (hw->virtio_user_dev) 1515 VTPCI_OPS(hw) = &virtio_user_ops; 1516 else 1517 #endif 1518 if (hw->modern) 1519 VTPCI_OPS(hw) = &modern_ops; 1520 else 1521 VTPCI_OPS(hw) = &legacy_ops; 1522 } 1523 1524 /* 1525 * This function is based on probe() function in virtio_pci.c 1526 * It returns 0 on success. 1527 */ 1528 int 1529 eth_virtio_dev_init(struct rte_eth_dev *eth_dev) 1530 { 1531 struct virtio_hw *hw = eth_dev->data->dev_private; 1532 int ret; 1533 1534 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf)); 1535 1536 eth_dev->dev_ops = &virtio_eth_dev_ops; 1537 eth_dev->tx_pkt_burst = &virtio_xmit_pkts; 1538 1539 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1540 if (!hw->virtio_user_dev) { 1541 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1542 if (ret) 1543 return ret; 1544 } 1545 1546 virtio_set_vtpci_ops(hw); 1547 if (hw->use_simple_rxtx) { 1548 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple; 1549 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec; 1550 } else { 1551 rx_func_get(eth_dev); 1552 } 1553 return 0; 1554 } 1555 1556 /* Allocate memory for storing MAC addresses */ 1557 eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0); 1558 if (eth_dev->data->mac_addrs == NULL) { 1559 PMD_INIT_LOG(ERR, 1560 "Failed to allocate %d bytes needed to store MAC addresses", 1561 VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN); 1562 return -ENOMEM; 1563 } 1564 1565 hw->port_id = eth_dev->data->port_id; 1566 /* For virtio_user case the hw->virtio_user_dev is populated by 1567 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called. 1568 */ 1569 if (!hw->virtio_user_dev) { 1570 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1571 if (ret) 1572 return ret; 1573 } 1574 1575 /* reset device and negotiate default features */ 1576 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES); 1577 if (ret < 0) 1578 return ret; 1579 1580 /* Setup interrupt callback */ 1581 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1582 rte_intr_callback_register(eth_dev->intr_handle, 1583 virtio_interrupt_handler, eth_dev); 1584 1585 return 0; 1586 } 1587 1588 static int 1589 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev) 1590 { 1591 PMD_INIT_FUNC_TRACE(); 1592 1593 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 1594 return -EPERM; 1595 1596 virtio_dev_stop(eth_dev); 1597 virtio_dev_close(eth_dev); 1598 1599 eth_dev->dev_ops = NULL; 1600 eth_dev->tx_pkt_burst = NULL; 1601 eth_dev->rx_pkt_burst = NULL; 1602 1603 rte_free(eth_dev->data->mac_addrs); 1604 eth_dev->data->mac_addrs = NULL; 1605 1606 /* reset interrupt callback */ 1607 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1608 rte_intr_callback_unregister(eth_dev->intr_handle, 1609 virtio_interrupt_handler, 1610 eth_dev); 1611 if (eth_dev->device) 1612 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev)); 1613 1614 PMD_INIT_LOG(DEBUG, "dev_uninit completed"); 1615 1616 return 0; 1617 } 1618 1619 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 1620 struct rte_pci_device *pci_dev) 1621 { 1622 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw), 1623 eth_virtio_dev_init); 1624 } 1625 1626 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev) 1627 { 1628 return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit); 1629 } 1630 1631 static struct rte_pci_driver rte_virtio_pmd = { 1632 .driver = { 1633 .name = "net_virtio", 1634 }, 1635 .id_table = pci_id_virtio_map, 1636 .drv_flags = 0, 1637 .probe = eth_virtio_pci_probe, 1638 .remove = eth_virtio_pci_remove, 1639 }; 1640 1641 RTE_INIT(rte_virtio_pmd_init); 1642 static void 1643 rte_virtio_pmd_init(void) 1644 { 1645 if (rte_eal_iopl_init() != 0) { 1646 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD"); 1647 return; 1648 } 1649 1650 rte_pci_register(&rte_virtio_pmd); 1651 } 1652 1653 /* 1654 * Configure virtio device 1655 * It returns 0 on success. 1656 */ 1657 static int 1658 virtio_dev_configure(struct rte_eth_dev *dev) 1659 { 1660 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 1661 struct virtio_hw *hw = dev->data->dev_private; 1662 uint64_t req_features; 1663 int ret; 1664 1665 PMD_INIT_LOG(DEBUG, "configure"); 1666 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES; 1667 if (rxmode->hw_ip_checksum) 1668 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM); 1669 if (rxmode->enable_lro) 1670 req_features |= 1671 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 1672 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 1673 1674 /* if request features changed, reinit the device */ 1675 if (req_features != hw->req_guest_features) { 1676 ret = virtio_init_device(dev, req_features); 1677 if (ret < 0) 1678 return ret; 1679 } 1680 1681 if (rxmode->hw_ip_checksum && 1682 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) { 1683 PMD_DRV_LOG(NOTICE, 1684 "rx ip checksum not available on this host"); 1685 return -ENOTSUP; 1686 } 1687 1688 if (rxmode->enable_lro && 1689 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) || 1690 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) { 1691 PMD_DRV_LOG(NOTICE, 1692 "lro not available on this host"); 1693 return -ENOTSUP; 1694 } 1695 1696 /* start control queue */ 1697 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 1698 virtio_dev_cq_start(dev); 1699 1700 hw->vlan_strip = rxmode->hw_vlan_strip; 1701 1702 if (rxmode->hw_vlan_filter 1703 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 1704 PMD_DRV_LOG(NOTICE, 1705 "vlan filtering not available on this host"); 1706 return -ENOTSUP; 1707 } 1708 1709 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1710 /* Enable vector (0) for Link State Intrerrupt */ 1711 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) == 1712 VIRTIO_MSI_NO_VECTOR) { 1713 PMD_DRV_LOG(ERR, "failed to set config vector"); 1714 return -EBUSY; 1715 } 1716 1717 return 0; 1718 } 1719 1720 1721 static int 1722 virtio_dev_start(struct rte_eth_dev *dev) 1723 { 1724 uint16_t nb_queues, i; 1725 struct virtnet_rx *rxvq; 1726 struct virtnet_tx *txvq __rte_unused; 1727 struct virtio_hw *hw = dev->data->dev_private; 1728 1729 /* check if lsc interrupt feature is enabled */ 1730 if (dev->data->dev_conf.intr_conf.lsc) { 1731 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) { 1732 PMD_DRV_LOG(ERR, "link status not supported by host"); 1733 return -ENOTSUP; 1734 } 1735 } 1736 1737 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that 1738 * in device configure, but it could be unmapped when device is 1739 * stopped. 1740 */ 1741 if (dev->data->dev_conf.intr_conf.lsc || 1742 dev->data->dev_conf.intr_conf.rxq) { 1743 rte_intr_disable(dev->intr_handle); 1744 1745 if (rte_intr_enable(dev->intr_handle) < 0) { 1746 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1747 return -EIO; 1748 } 1749 } 1750 1751 /*Notify the backend 1752 *Otherwise the tap backend might already stop its queue due to fullness. 1753 *vhost backend will have no chance to be waked up 1754 */ 1755 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues); 1756 if (hw->max_queue_pairs > 1) { 1757 if (virtio_set_multiple_queues(dev, nb_queues) != 0) 1758 return -EINVAL; 1759 } 1760 1761 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues); 1762 1763 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1764 rxvq = dev->data->rx_queues[i]; 1765 virtqueue_notify(rxvq->vq); 1766 } 1767 1768 PMD_INIT_LOG(DEBUG, "Notified backend at initialization"); 1769 1770 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1771 rxvq = dev->data->rx_queues[i]; 1772 VIRTQUEUE_DUMP(rxvq->vq); 1773 } 1774 1775 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1776 txvq = dev->data->tx_queues[i]; 1777 VIRTQUEUE_DUMP(txvq->vq); 1778 } 1779 1780 hw->started = 1; 1781 1782 /* Initialize Link state */ 1783 virtio_dev_link_update(dev, 0); 1784 1785 return 0; 1786 } 1787 1788 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev) 1789 { 1790 struct rte_mbuf *buf; 1791 int i, mbuf_num = 0; 1792 1793 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1794 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 1795 1796 PMD_INIT_LOG(DEBUG, 1797 "Before freeing rxq[%d] used and unused buf", i); 1798 VIRTQUEUE_DUMP(rxvq->vq); 1799 1800 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq); 1801 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) { 1802 rte_pktmbuf_free(buf); 1803 mbuf_num++; 1804 } 1805 1806 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num); 1807 PMD_INIT_LOG(DEBUG, 1808 "After freeing rxq[%d] used and unused buf", i); 1809 VIRTQUEUE_DUMP(rxvq->vq); 1810 } 1811 1812 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1813 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 1814 1815 PMD_INIT_LOG(DEBUG, 1816 "Before freeing txq[%d] used and unused bufs", 1817 i); 1818 VIRTQUEUE_DUMP(txvq->vq); 1819 1820 mbuf_num = 0; 1821 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) { 1822 rte_pktmbuf_free(buf); 1823 mbuf_num++; 1824 } 1825 1826 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num); 1827 PMD_INIT_LOG(DEBUG, 1828 "After freeing txq[%d] used and unused buf", i); 1829 VIRTQUEUE_DUMP(txvq->vq); 1830 } 1831 } 1832 1833 /* 1834 * Stop device: disable interrupt and mark link down 1835 */ 1836 static void 1837 virtio_dev_stop(struct rte_eth_dev *dev) 1838 { 1839 struct virtio_hw *hw = dev->data->dev_private; 1840 struct rte_eth_link link; 1841 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; 1842 1843 PMD_INIT_LOG(DEBUG, "stop"); 1844 1845 if (intr_conf->lsc || intr_conf->rxq) 1846 rte_intr_disable(dev->intr_handle); 1847 1848 hw->started = 0; 1849 memset(&link, 0, sizeof(link)); 1850 virtio_dev_atomic_write_link_status(dev, &link); 1851 } 1852 1853 static int 1854 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete) 1855 { 1856 struct rte_eth_link link, old; 1857 uint16_t status; 1858 struct virtio_hw *hw = dev->data->dev_private; 1859 memset(&link, 0, sizeof(link)); 1860 virtio_dev_atomic_read_link_status(dev, &link); 1861 old = link; 1862 link.link_duplex = ETH_LINK_FULL_DUPLEX; 1863 link.link_speed = SPEED_10G; 1864 1865 if (hw->started == 0) { 1866 link.link_status = ETH_LINK_DOWN; 1867 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1868 PMD_INIT_LOG(DEBUG, "Get link status from hw"); 1869 vtpci_read_dev_config(hw, 1870 offsetof(struct virtio_net_config, status), 1871 &status, sizeof(status)); 1872 if ((status & VIRTIO_NET_S_LINK_UP) == 0) { 1873 link.link_status = ETH_LINK_DOWN; 1874 PMD_INIT_LOG(DEBUG, "Port %d is down", 1875 dev->data->port_id); 1876 } else { 1877 link.link_status = ETH_LINK_UP; 1878 PMD_INIT_LOG(DEBUG, "Port %d is up", 1879 dev->data->port_id); 1880 } 1881 } else { 1882 link.link_status = ETH_LINK_UP; 1883 } 1884 virtio_dev_atomic_write_link_status(dev, &link); 1885 1886 return (old.link_status == link.link_status) ? -1 : 0; 1887 } 1888 1889 static void 1890 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) 1891 { 1892 uint64_t tso_mask, host_features; 1893 struct virtio_hw *hw = dev->data->dev_private; 1894 1895 dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */ 1896 1897 dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL; 1898 dev_info->max_rx_queues = 1899 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES); 1900 dev_info->max_tx_queues = 1901 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES); 1902 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE; 1903 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN; 1904 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS; 1905 dev_info->default_txconf = (struct rte_eth_txconf) { 1906 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS 1907 }; 1908 1909 host_features = VTPCI_OPS(hw)->get_features(hw); 1910 dev_info->rx_offload_capa = 0; 1911 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) { 1912 dev_info->rx_offload_capa |= 1913 DEV_RX_OFFLOAD_TCP_CKSUM | 1914 DEV_RX_OFFLOAD_UDP_CKSUM; 1915 } 1916 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 1917 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 1918 if ((host_features & tso_mask) == tso_mask) 1919 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO; 1920 1921 dev_info->tx_offload_capa = 0; 1922 if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) { 1923 dev_info->tx_offload_capa |= 1924 DEV_TX_OFFLOAD_UDP_CKSUM | 1925 DEV_TX_OFFLOAD_TCP_CKSUM; 1926 } 1927 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) | 1928 (1ULL << VIRTIO_NET_F_HOST_TSO6); 1929 if ((hw->guest_features & tso_mask) == tso_mask) 1930 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO; 1931 } 1932 1933 /* 1934 * It enables testpmd to collect per queue stats. 1935 */ 1936 static int 1937 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev, 1938 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx, 1939 __rte_unused uint8_t is_rx) 1940 { 1941 return 0; 1942 } 1943 1944 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__); 1945 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map); 1946 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci"); 1947