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