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_bus_pci.h> 50 #include <rte_ether.h> 51 #include <rte_common.h> 52 #include <rte_errno.h> 53 #include <rte_cpuflags.h> 54 55 #include <rte_memory.h> 56 #include <rte_eal.h> 57 #include <rte_dev.h> 58 59 #include "virtio_ethdev.h" 60 #include "virtio_pci.h" 61 #include "virtio_logs.h" 62 #include "virtqueue.h" 63 #include "virtio_rxtx.h" 64 65 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev); 66 static int virtio_dev_configure(struct rte_eth_dev *dev); 67 static int virtio_dev_start(struct rte_eth_dev *dev); 68 static void virtio_dev_stop(struct rte_eth_dev *dev); 69 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev); 70 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev); 71 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev); 72 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev); 73 static void virtio_dev_info_get(struct rte_eth_dev *dev, 74 struct rte_eth_dev_info *dev_info); 75 static int virtio_dev_link_update(struct rte_eth_dev *dev, 76 int wait_to_complete); 77 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask); 78 79 static void virtio_set_hwaddr(struct virtio_hw *hw); 80 static void virtio_get_hwaddr(struct virtio_hw *hw); 81 82 static int virtio_dev_stats_get(struct rte_eth_dev *dev, 83 struct rte_eth_stats *stats); 84 static int virtio_dev_xstats_get(struct rte_eth_dev *dev, 85 struct rte_eth_xstat *xstats, unsigned n); 86 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev, 87 struct rte_eth_xstat_name *xstats_names, 88 unsigned limit); 89 static void virtio_dev_stats_reset(struct rte_eth_dev *dev); 90 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev); 91 static int virtio_vlan_filter_set(struct rte_eth_dev *dev, 92 uint16_t vlan_id, int on); 93 static int virtio_mac_addr_add(struct rte_eth_dev *dev, 94 struct ether_addr *mac_addr, 95 uint32_t index, uint32_t vmdq); 96 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index); 97 static void virtio_mac_addr_set(struct rte_eth_dev *dev, 98 struct ether_addr *mac_addr); 99 100 static int virtio_intr_enable(struct rte_eth_dev *dev); 101 static int virtio_intr_disable(struct rte_eth_dev *dev); 102 103 static int virtio_dev_queue_stats_mapping_set( 104 struct rte_eth_dev *eth_dev, 105 uint16_t queue_id, 106 uint8_t stat_idx, 107 uint8_t is_rx); 108 109 /* 110 * The set of PCI devices this driver supports 111 */ 112 static const struct rte_pci_id pci_id_virtio_map[] = { 113 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) }, 114 { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) }, 115 { .vendor_id = 0, /* sentinel */ }, 116 }; 117 118 struct rte_virtio_xstats_name_off { 119 char name[RTE_ETH_XSTATS_NAME_SIZE]; 120 unsigned offset; 121 }; 122 123 /* [rt]x_qX_ is prepended to the name string here */ 124 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = { 125 {"good_packets", offsetof(struct virtnet_rx, stats.packets)}, 126 {"good_bytes", offsetof(struct virtnet_rx, stats.bytes)}, 127 {"errors", offsetof(struct virtnet_rx, stats.errors)}, 128 {"multicast_packets", offsetof(struct virtnet_rx, stats.multicast)}, 129 {"broadcast_packets", offsetof(struct virtnet_rx, stats.broadcast)}, 130 {"undersize_packets", offsetof(struct virtnet_rx, stats.size_bins[0])}, 131 {"size_64_packets", offsetof(struct virtnet_rx, stats.size_bins[1])}, 132 {"size_65_127_packets", offsetof(struct virtnet_rx, stats.size_bins[2])}, 133 {"size_128_255_packets", offsetof(struct virtnet_rx, stats.size_bins[3])}, 134 {"size_256_511_packets", offsetof(struct virtnet_rx, stats.size_bins[4])}, 135 {"size_512_1023_packets", offsetof(struct virtnet_rx, stats.size_bins[5])}, 136 {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])}, 137 {"size_1519_max_packets", offsetof(struct virtnet_rx, stats.size_bins[7])}, 138 }; 139 140 /* [rt]x_qX_ is prepended to the name string here */ 141 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = { 142 {"good_packets", offsetof(struct virtnet_tx, stats.packets)}, 143 {"good_bytes", offsetof(struct virtnet_tx, stats.bytes)}, 144 {"errors", offsetof(struct virtnet_tx, stats.errors)}, 145 {"multicast_packets", offsetof(struct virtnet_tx, stats.multicast)}, 146 {"broadcast_packets", offsetof(struct virtnet_tx, stats.broadcast)}, 147 {"undersize_packets", offsetof(struct virtnet_tx, stats.size_bins[0])}, 148 {"size_64_packets", offsetof(struct virtnet_tx, stats.size_bins[1])}, 149 {"size_65_127_packets", offsetof(struct virtnet_tx, stats.size_bins[2])}, 150 {"size_128_255_packets", offsetof(struct virtnet_tx, stats.size_bins[3])}, 151 {"size_256_511_packets", offsetof(struct virtnet_tx, stats.size_bins[4])}, 152 {"size_512_1023_packets", offsetof(struct virtnet_tx, stats.size_bins[5])}, 153 {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])}, 154 {"size_1519_max_packets", offsetof(struct virtnet_tx, stats.size_bins[7])}, 155 }; 156 157 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \ 158 sizeof(rte_virtio_rxq_stat_strings[0])) 159 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \ 160 sizeof(rte_virtio_txq_stat_strings[0])) 161 162 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS]; 163 164 static int 165 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, 166 int *dlen, int pkt_num) 167 { 168 uint32_t head, i; 169 int k, sum = 0; 170 virtio_net_ctrl_ack status = ~0; 171 struct virtio_pmd_ctrl *result; 172 struct virtqueue *vq; 173 174 ctrl->status = status; 175 176 if (!cvq || !cvq->vq) { 177 PMD_INIT_LOG(ERR, "Control queue is not supported."); 178 return -1; 179 } 180 vq = cvq->vq; 181 head = vq->vq_desc_head_idx; 182 183 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, " 184 "vq->hw->cvq = %p vq = %p", 185 vq->vq_desc_head_idx, status, vq->hw->cvq, vq); 186 187 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1)) 188 return -1; 189 190 memcpy(cvq->virtio_net_hdr_mz->addr, ctrl, 191 sizeof(struct virtio_pmd_ctrl)); 192 193 /* 194 * Format is enforced in qemu code: 195 * One TX packet for header; 196 * At least one TX packet per argument; 197 * One RX packet for ACK. 198 */ 199 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT; 200 vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem; 201 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr); 202 vq->vq_free_cnt--; 203 i = vq->vq_ring.desc[head].next; 204 205 for (k = 0; k < pkt_num; k++) { 206 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT; 207 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 208 + sizeof(struct virtio_net_ctrl_hdr) 209 + sizeof(ctrl->status) + sizeof(uint8_t)*sum; 210 vq->vq_ring.desc[i].len = dlen[k]; 211 sum += dlen[k]; 212 vq->vq_free_cnt--; 213 i = vq->vq_ring.desc[i].next; 214 } 215 216 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE; 217 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem 218 + sizeof(struct virtio_net_ctrl_hdr); 219 vq->vq_ring.desc[i].len = sizeof(ctrl->status); 220 vq->vq_free_cnt--; 221 222 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next; 223 224 vq_update_avail_ring(vq, head); 225 vq_update_avail_idx(vq); 226 227 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index); 228 229 virtqueue_notify(vq); 230 231 rte_rmb(); 232 while (VIRTQUEUE_NUSED(vq) == 0) { 233 rte_rmb(); 234 usleep(100); 235 } 236 237 while (VIRTQUEUE_NUSED(vq)) { 238 uint32_t idx, desc_idx, used_idx; 239 struct vring_used_elem *uep; 240 241 used_idx = (uint32_t)(vq->vq_used_cons_idx 242 & (vq->vq_nentries - 1)); 243 uep = &vq->vq_ring.used->ring[used_idx]; 244 idx = (uint32_t) uep->id; 245 desc_idx = idx; 246 247 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) { 248 desc_idx = vq->vq_ring.desc[desc_idx].next; 249 vq->vq_free_cnt++; 250 } 251 252 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx; 253 vq->vq_desc_head_idx = idx; 254 255 vq->vq_used_cons_idx++; 256 vq->vq_free_cnt++; 257 } 258 259 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d", 260 vq->vq_free_cnt, vq->vq_desc_head_idx); 261 262 result = cvq->virtio_net_hdr_mz->addr; 263 264 return result->status; 265 } 266 267 static int 268 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues) 269 { 270 struct virtio_hw *hw = dev->data->dev_private; 271 struct virtio_pmd_ctrl ctrl; 272 int dlen[1]; 273 int ret; 274 275 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ; 276 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET; 277 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t)); 278 279 dlen[0] = sizeof(uint16_t); 280 281 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 282 if (ret) { 283 PMD_INIT_LOG(ERR, "Multiqueue configured but send command " 284 "failed, this is too late now..."); 285 return -EINVAL; 286 } 287 288 return 0; 289 } 290 291 static void 292 virtio_dev_queue_release(void *queue __rte_unused) 293 { 294 /* do nothing */ 295 } 296 297 static uint16_t 298 virtio_get_nr_vq(struct virtio_hw *hw) 299 { 300 uint16_t nr_vq = hw->max_queue_pairs * 2; 301 302 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 303 nr_vq += 1; 304 305 return nr_vq; 306 } 307 308 static void 309 virtio_init_vring(struct virtqueue *vq) 310 { 311 int size = vq->vq_nentries; 312 struct vring *vr = &vq->vq_ring; 313 uint8_t *ring_mem = vq->vq_ring_virt_mem; 314 315 PMD_INIT_FUNC_TRACE(); 316 317 /* 318 * Reinitialise since virtio port might have been stopped and restarted 319 */ 320 memset(ring_mem, 0, vq->vq_ring_size); 321 vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN); 322 vq->vq_used_cons_idx = 0; 323 vq->vq_desc_head_idx = 0; 324 vq->vq_avail_idx = 0; 325 vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1); 326 vq->vq_free_cnt = vq->vq_nentries; 327 memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries); 328 329 vring_desc_init(vr->desc, size); 330 331 /* 332 * Disable device(host) interrupting guest 333 */ 334 virtqueue_disable_intr(vq); 335 } 336 337 static int 338 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) 339 { 340 char vq_name[VIRTQUEUE_MAX_NAME_SZ]; 341 char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ]; 342 const struct rte_memzone *mz = NULL, *hdr_mz = NULL; 343 unsigned int vq_size, size; 344 struct virtio_hw *hw = dev->data->dev_private; 345 struct virtnet_rx *rxvq = NULL; 346 struct virtnet_tx *txvq = NULL; 347 struct virtnet_ctl *cvq = NULL; 348 struct virtqueue *vq; 349 size_t sz_hdr_mz = 0; 350 void *sw_ring = NULL; 351 int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx); 352 int ret; 353 354 PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx); 355 356 /* 357 * Read the virtqueue size from the Queue Size field 358 * Always power of 2 and if 0 virtqueue does not exist 359 */ 360 vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx); 361 PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size); 362 if (vq_size == 0) { 363 PMD_INIT_LOG(ERR, "virtqueue does not exist"); 364 return -EINVAL; 365 } 366 367 if (!rte_is_power_of_2(vq_size)) { 368 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2"); 369 return -EINVAL; 370 } 371 372 snprintf(vq_name, sizeof(vq_name), "port%d_vq%d", 373 dev->data->port_id, vtpci_queue_idx); 374 375 size = RTE_ALIGN_CEIL(sizeof(*vq) + 376 vq_size * sizeof(struct vq_desc_extra), 377 RTE_CACHE_LINE_SIZE); 378 if (queue_type == VTNET_TQ) { 379 /* 380 * For each xmit packet, allocate a virtio_net_hdr 381 * and indirect ring elements 382 */ 383 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region); 384 } else if (queue_type == VTNET_CQ) { 385 /* Allocate a page for control vq command, data and status */ 386 sz_hdr_mz = PAGE_SIZE; 387 } 388 389 vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE, 390 SOCKET_ID_ANY); 391 if (vq == NULL) { 392 PMD_INIT_LOG(ERR, "can not allocate vq"); 393 return -ENOMEM; 394 } 395 hw->vqs[vtpci_queue_idx] = vq; 396 397 vq->hw = hw; 398 vq->vq_queue_index = vtpci_queue_idx; 399 vq->vq_nentries = vq_size; 400 401 /* 402 * Reserve a memzone for vring elements 403 */ 404 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN); 405 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN); 406 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", 407 size, vq->vq_ring_size); 408 409 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, 410 SOCKET_ID_ANY, 411 0, VIRTIO_PCI_VRING_ALIGN); 412 if (mz == NULL) { 413 if (rte_errno == EEXIST) 414 mz = rte_memzone_lookup(vq_name); 415 if (mz == NULL) { 416 ret = -ENOMEM; 417 goto fail_q_alloc; 418 } 419 } 420 421 memset(mz->addr, 0, mz->len); 422 423 vq->vq_ring_mem = mz->iova; 424 vq->vq_ring_virt_mem = mz->addr; 425 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64, 426 (uint64_t)mz->iova); 427 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64, 428 (uint64_t)(uintptr_t)mz->addr); 429 430 virtio_init_vring(vq); 431 432 if (sz_hdr_mz) { 433 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr", 434 dev->data->port_id, vtpci_queue_idx); 435 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz, 436 SOCKET_ID_ANY, 0, 437 RTE_CACHE_LINE_SIZE); 438 if (hdr_mz == NULL) { 439 if (rte_errno == EEXIST) 440 hdr_mz = rte_memzone_lookup(vq_hdr_name); 441 if (hdr_mz == NULL) { 442 ret = -ENOMEM; 443 goto fail_q_alloc; 444 } 445 } 446 } 447 448 if (queue_type == VTNET_RQ) { 449 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) * 450 sizeof(vq->sw_ring[0]); 451 452 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw, 453 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY); 454 if (!sw_ring) { 455 PMD_INIT_LOG(ERR, "can not allocate RX soft ring"); 456 ret = -ENOMEM; 457 goto fail_q_alloc; 458 } 459 460 vq->sw_ring = sw_ring; 461 rxvq = &vq->rxq; 462 rxvq->vq = vq; 463 rxvq->port_id = dev->data->port_id; 464 rxvq->mz = mz; 465 } else if (queue_type == VTNET_TQ) { 466 txvq = &vq->txq; 467 txvq->vq = vq; 468 txvq->port_id = dev->data->port_id; 469 txvq->mz = mz; 470 txvq->virtio_net_hdr_mz = hdr_mz; 471 txvq->virtio_net_hdr_mem = hdr_mz->iova; 472 } else if (queue_type == VTNET_CQ) { 473 cvq = &vq->cq; 474 cvq->vq = vq; 475 cvq->mz = mz; 476 cvq->virtio_net_hdr_mz = hdr_mz; 477 cvq->virtio_net_hdr_mem = hdr_mz->iova; 478 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE); 479 480 hw->cvq = cvq; 481 } 482 483 /* For virtio_user case (that is when hw->dev is NULL), we use 484 * virtual address. And we need properly set _offset_, please see 485 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information. 486 */ 487 if (!hw->virtio_user_dev) 488 vq->offset = offsetof(struct rte_mbuf, buf_iova); 489 else { 490 vq->vq_ring_mem = (uintptr_t)mz->addr; 491 vq->offset = offsetof(struct rte_mbuf, buf_addr); 492 if (queue_type == VTNET_TQ) 493 txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 494 else if (queue_type == VTNET_CQ) 495 cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr; 496 } 497 498 if (queue_type == VTNET_TQ) { 499 struct virtio_tx_region *txr; 500 unsigned int i; 501 502 txr = hdr_mz->addr; 503 memset(txr, 0, vq_size * sizeof(*txr)); 504 for (i = 0; i < vq_size; i++) { 505 struct vring_desc *start_dp = txr[i].tx_indir; 506 507 vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir)); 508 509 /* first indirect descriptor is always the tx header */ 510 start_dp->addr = txvq->virtio_net_hdr_mem 511 + i * sizeof(*txr) 512 + offsetof(struct virtio_tx_region, tx_hdr); 513 514 start_dp->len = hw->vtnet_hdr_size; 515 start_dp->flags = VRING_DESC_F_NEXT; 516 } 517 } 518 519 if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) { 520 PMD_INIT_LOG(ERR, "setup_queue failed"); 521 return -EINVAL; 522 } 523 524 return 0; 525 526 fail_q_alloc: 527 rte_free(sw_ring); 528 rte_memzone_free(hdr_mz); 529 rte_memzone_free(mz); 530 rte_free(vq); 531 532 return ret; 533 } 534 535 static void 536 virtio_free_queues(struct virtio_hw *hw) 537 { 538 uint16_t nr_vq = virtio_get_nr_vq(hw); 539 struct virtqueue *vq; 540 int queue_type; 541 uint16_t i; 542 543 if (hw->vqs == NULL) 544 return; 545 546 for (i = 0; i < nr_vq; i++) { 547 vq = hw->vqs[i]; 548 if (!vq) 549 continue; 550 551 queue_type = virtio_get_queue_type(hw, i); 552 if (queue_type == VTNET_RQ) { 553 rte_free(vq->sw_ring); 554 rte_memzone_free(vq->rxq.mz); 555 } else if (queue_type == VTNET_TQ) { 556 rte_memzone_free(vq->txq.mz); 557 rte_memzone_free(vq->txq.virtio_net_hdr_mz); 558 } else { 559 rte_memzone_free(vq->cq.mz); 560 rte_memzone_free(vq->cq.virtio_net_hdr_mz); 561 } 562 563 rte_free(vq); 564 hw->vqs[i] = NULL; 565 } 566 567 rte_free(hw->vqs); 568 hw->vqs = NULL; 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 virtio_intr_disable(dev); 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 .vlan_offload_set = virtio_dev_vlan_offload_set, 777 .rx_queue_setup = virtio_dev_rx_queue_setup, 778 .rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable, 779 .rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable, 780 .rx_queue_release = virtio_dev_queue_release, 781 .rx_descriptor_done = virtio_dev_rx_queue_done, 782 .tx_queue_setup = virtio_dev_tx_queue_setup, 783 .tx_queue_release = virtio_dev_queue_release, 784 /* collect stats per queue */ 785 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set, 786 .vlan_filter_set = virtio_vlan_filter_set, 787 .mac_addr_add = virtio_mac_addr_add, 788 .mac_addr_remove = virtio_mac_addr_remove, 789 .mac_addr_set = virtio_mac_addr_set, 790 }; 791 792 static inline int 793 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev, 794 struct rte_eth_link *link) 795 { 796 struct rte_eth_link *dst = link; 797 struct rte_eth_link *src = &(dev->data->dev_link); 798 799 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 800 *(uint64_t *)src) == 0) 801 return -1; 802 803 return 0; 804 } 805 806 /** 807 * Atomically writes the link status information into global 808 * structure rte_eth_dev. 809 * 810 * @param dev 811 * - Pointer to the structure rte_eth_dev to read from. 812 * - Pointer to the buffer to be saved with the link status. 813 * 814 * @return 815 * - On success, zero. 816 * - On failure, negative value. 817 */ 818 static inline int 819 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev, 820 struct rte_eth_link *link) 821 { 822 struct rte_eth_link *dst = &(dev->data->dev_link); 823 struct rte_eth_link *src = link; 824 825 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 826 *(uint64_t *)src) == 0) 827 return -1; 828 829 return 0; 830 } 831 832 static void 833 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 834 { 835 unsigned i; 836 837 for (i = 0; i < dev->data->nb_tx_queues; i++) { 838 const struct virtnet_tx *txvq = dev->data->tx_queues[i]; 839 if (txvq == NULL) 840 continue; 841 842 stats->opackets += txvq->stats.packets; 843 stats->obytes += txvq->stats.bytes; 844 stats->oerrors += txvq->stats.errors; 845 846 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 847 stats->q_opackets[i] = txvq->stats.packets; 848 stats->q_obytes[i] = txvq->stats.bytes; 849 } 850 } 851 852 for (i = 0; i < dev->data->nb_rx_queues; i++) { 853 const struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 854 if (rxvq == NULL) 855 continue; 856 857 stats->ipackets += rxvq->stats.packets; 858 stats->ibytes += rxvq->stats.bytes; 859 stats->ierrors += rxvq->stats.errors; 860 861 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 862 stats->q_ipackets[i] = rxvq->stats.packets; 863 stats->q_ibytes[i] = rxvq->stats.bytes; 864 } 865 } 866 867 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed; 868 } 869 870 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev, 871 struct rte_eth_xstat_name *xstats_names, 872 __rte_unused unsigned limit) 873 { 874 unsigned i; 875 unsigned count = 0; 876 unsigned t; 877 878 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 879 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 880 881 if (xstats_names != NULL) { 882 /* Note: limit checked in rte_eth_xstats_names() */ 883 884 for (i = 0; i < dev->data->nb_rx_queues; i++) { 885 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 886 if (rxvq == NULL) 887 continue; 888 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 889 snprintf(xstats_names[count].name, 890 sizeof(xstats_names[count].name), 891 "rx_q%u_%s", i, 892 rte_virtio_rxq_stat_strings[t].name); 893 count++; 894 } 895 } 896 897 for (i = 0; i < dev->data->nb_tx_queues; i++) { 898 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 899 if (txvq == NULL) 900 continue; 901 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 902 snprintf(xstats_names[count].name, 903 sizeof(xstats_names[count].name), 904 "tx_q%u_%s", i, 905 rte_virtio_txq_stat_strings[t].name); 906 count++; 907 } 908 } 909 return count; 910 } 911 return nstats; 912 } 913 914 static int 915 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats, 916 unsigned n) 917 { 918 unsigned i; 919 unsigned count = 0; 920 921 unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS + 922 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS; 923 924 if (n < nstats) 925 return nstats; 926 927 for (i = 0; i < dev->data->nb_rx_queues; i++) { 928 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 929 930 if (rxvq == NULL) 931 continue; 932 933 unsigned t; 934 935 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) { 936 xstats[count].value = *(uint64_t *)(((char *)rxvq) + 937 rte_virtio_rxq_stat_strings[t].offset); 938 xstats[count].id = count; 939 count++; 940 } 941 } 942 943 for (i = 0; i < dev->data->nb_tx_queues; i++) { 944 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 945 946 if (txvq == NULL) 947 continue; 948 949 unsigned t; 950 951 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) { 952 xstats[count].value = *(uint64_t *)(((char *)txvq) + 953 rte_virtio_txq_stat_strings[t].offset); 954 xstats[count].id = count; 955 count++; 956 } 957 } 958 959 return count; 960 } 961 962 static int 963 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 964 { 965 virtio_update_stats(dev, stats); 966 967 return 0; 968 } 969 970 static void 971 virtio_dev_stats_reset(struct rte_eth_dev *dev) 972 { 973 unsigned int i; 974 975 for (i = 0; i < dev->data->nb_tx_queues; i++) { 976 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 977 if (txvq == NULL) 978 continue; 979 980 txvq->stats.packets = 0; 981 txvq->stats.bytes = 0; 982 txvq->stats.errors = 0; 983 txvq->stats.multicast = 0; 984 txvq->stats.broadcast = 0; 985 memset(txvq->stats.size_bins, 0, 986 sizeof(txvq->stats.size_bins[0]) * 8); 987 } 988 989 for (i = 0; i < dev->data->nb_rx_queues; i++) { 990 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 991 if (rxvq == NULL) 992 continue; 993 994 rxvq->stats.packets = 0; 995 rxvq->stats.bytes = 0; 996 rxvq->stats.errors = 0; 997 rxvq->stats.multicast = 0; 998 rxvq->stats.broadcast = 0; 999 memset(rxvq->stats.size_bins, 0, 1000 sizeof(rxvq->stats.size_bins[0]) * 8); 1001 } 1002 } 1003 1004 static void 1005 virtio_set_hwaddr(struct virtio_hw *hw) 1006 { 1007 vtpci_write_dev_config(hw, 1008 offsetof(struct virtio_net_config, mac), 1009 &hw->mac_addr, ETHER_ADDR_LEN); 1010 } 1011 1012 static void 1013 virtio_get_hwaddr(struct virtio_hw *hw) 1014 { 1015 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) { 1016 vtpci_read_dev_config(hw, 1017 offsetof(struct virtio_net_config, mac), 1018 &hw->mac_addr, ETHER_ADDR_LEN); 1019 } else { 1020 eth_random_addr(&hw->mac_addr[0]); 1021 virtio_set_hwaddr(hw); 1022 } 1023 } 1024 1025 static int 1026 virtio_mac_table_set(struct virtio_hw *hw, 1027 const struct virtio_net_ctrl_mac *uc, 1028 const struct virtio_net_ctrl_mac *mc) 1029 { 1030 struct virtio_pmd_ctrl ctrl; 1031 int err, len[2]; 1032 1033 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 1034 PMD_DRV_LOG(INFO, "host does not support mac table"); 1035 return -1; 1036 } 1037 1038 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1039 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 1040 1041 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries); 1042 memcpy(ctrl.data, uc, len[0]); 1043 1044 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries); 1045 memcpy(ctrl.data + len[0], mc, len[1]); 1046 1047 err = virtio_send_command(hw->cvq, &ctrl, len, 2); 1048 if (err != 0) 1049 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err); 1050 return err; 1051 } 1052 1053 static int 1054 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr, 1055 uint32_t index, uint32_t vmdq __rte_unused) 1056 { 1057 struct virtio_hw *hw = dev->data->dev_private; 1058 const struct ether_addr *addrs = dev->data->mac_addrs; 1059 unsigned int i; 1060 struct virtio_net_ctrl_mac *uc, *mc; 1061 1062 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1063 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1064 return -EINVAL; 1065 } 1066 1067 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1068 uc->entries = 0; 1069 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1070 mc->entries = 0; 1071 1072 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1073 const struct ether_addr *addr 1074 = (i == index) ? mac_addr : addrs + i; 1075 struct virtio_net_ctrl_mac *tbl 1076 = is_multicast_ether_addr(addr) ? mc : uc; 1077 1078 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN); 1079 } 1080 1081 return virtio_mac_table_set(hw, uc, mc); 1082 } 1083 1084 static void 1085 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index) 1086 { 1087 struct virtio_hw *hw = dev->data->dev_private; 1088 struct ether_addr *addrs = dev->data->mac_addrs; 1089 struct virtio_net_ctrl_mac *uc, *mc; 1090 unsigned int i; 1091 1092 if (index >= VIRTIO_MAX_MAC_ADDRS) { 1093 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 1094 return; 1095 } 1096 1097 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 1098 uc->entries = 0; 1099 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 1100 mc->entries = 0; 1101 1102 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 1103 struct virtio_net_ctrl_mac *tbl; 1104 1105 if (i == index || is_zero_ether_addr(addrs + i)) 1106 continue; 1107 1108 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc; 1109 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN); 1110 } 1111 1112 virtio_mac_table_set(hw, uc, mc); 1113 } 1114 1115 static void 1116 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr) 1117 { 1118 struct virtio_hw *hw = dev->data->dev_private; 1119 1120 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN); 1121 1122 /* Use atomic update if available */ 1123 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 1124 struct virtio_pmd_ctrl ctrl; 1125 int len = ETHER_ADDR_LEN; 1126 1127 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 1128 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; 1129 1130 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN); 1131 virtio_send_command(hw->cvq, &ctrl, &len, 1); 1132 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) 1133 virtio_set_hwaddr(hw); 1134 } 1135 1136 static int 1137 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 1138 { 1139 struct virtio_hw *hw = dev->data->dev_private; 1140 struct virtio_pmd_ctrl ctrl; 1141 int len; 1142 1143 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) 1144 return -ENOTSUP; 1145 1146 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN; 1147 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; 1148 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id)); 1149 len = sizeof(vlan_id); 1150 1151 return virtio_send_command(hw->cvq, &ctrl, &len, 1); 1152 } 1153 1154 static int 1155 virtio_intr_enable(struct rte_eth_dev *dev) 1156 { 1157 struct virtio_hw *hw = dev->data->dev_private; 1158 1159 if (rte_intr_enable(dev->intr_handle) < 0) 1160 return -1; 1161 1162 if (!hw->virtio_user_dev) 1163 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev)); 1164 1165 return 0; 1166 } 1167 1168 static int 1169 virtio_intr_disable(struct rte_eth_dev *dev) 1170 { 1171 struct virtio_hw *hw = dev->data->dev_private; 1172 1173 if (rte_intr_disable(dev->intr_handle) < 0) 1174 return -1; 1175 1176 if (!hw->virtio_user_dev) 1177 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev)); 1178 1179 return 0; 1180 } 1181 1182 static int 1183 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features) 1184 { 1185 uint64_t host_features; 1186 1187 /* Prepare guest_features: feature that driver wants to support */ 1188 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64, 1189 req_features); 1190 1191 /* Read device(host) feature bits */ 1192 host_features = VTPCI_OPS(hw)->get_features(hw); 1193 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64, 1194 host_features); 1195 1196 /* If supported, ensure MTU value is valid before acknowledging it. */ 1197 if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) { 1198 struct virtio_net_config config; 1199 1200 vtpci_read_dev_config(hw, 1201 offsetof(struct virtio_net_config, mtu), 1202 &config.mtu, sizeof(config.mtu)); 1203 1204 if (config.mtu < ETHER_MIN_MTU) 1205 req_features &= ~(1ULL << VIRTIO_NET_F_MTU); 1206 } 1207 1208 /* 1209 * Negotiate features: Subset of device feature bits are written back 1210 * guest feature bits. 1211 */ 1212 hw->guest_features = req_features; 1213 hw->guest_features = vtpci_negotiate_features(hw, host_features); 1214 PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64, 1215 hw->guest_features); 1216 1217 if (hw->modern) { 1218 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) { 1219 PMD_INIT_LOG(ERR, 1220 "VIRTIO_F_VERSION_1 features is not enabled."); 1221 return -1; 1222 } 1223 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK); 1224 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) { 1225 PMD_INIT_LOG(ERR, 1226 "failed to set FEATURES_OK status!"); 1227 return -1; 1228 } 1229 } 1230 1231 hw->req_guest_features = req_features; 1232 1233 return 0; 1234 } 1235 1236 /* 1237 * Process Virtio Config changed interrupt and call the callback 1238 * if link state changed. 1239 */ 1240 void 1241 virtio_interrupt_handler(void *param) 1242 { 1243 struct rte_eth_dev *dev = param; 1244 struct virtio_hw *hw = dev->data->dev_private; 1245 uint8_t isr; 1246 1247 /* Read interrupt status which clears interrupt */ 1248 isr = vtpci_isr(hw); 1249 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr); 1250 1251 if (virtio_intr_enable(dev) < 0) 1252 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1253 1254 if (isr & VIRTIO_PCI_ISR_CONFIG) { 1255 if (virtio_dev_link_update(dev, 0) == 0) 1256 _rte_eth_dev_callback_process(dev, 1257 RTE_ETH_EVENT_INTR_LSC, 1258 NULL, NULL); 1259 } 1260 1261 } 1262 1263 /* set rx and tx handlers according to what is supported */ 1264 static void 1265 set_rxtx_funcs(struct rte_eth_dev *eth_dev) 1266 { 1267 struct virtio_hw *hw = eth_dev->data->dev_private; 1268 1269 if (hw->use_simple_rx) { 1270 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u", 1271 eth_dev->data->port_id); 1272 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec; 1273 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1274 PMD_INIT_LOG(INFO, 1275 "virtio: using mergeable buffer Rx path on port %u", 1276 eth_dev->data->port_id); 1277 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts; 1278 } else { 1279 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u", 1280 eth_dev->data->port_id); 1281 eth_dev->rx_pkt_burst = &virtio_recv_pkts; 1282 } 1283 1284 if (hw->use_simple_tx) { 1285 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u", 1286 eth_dev->data->port_id); 1287 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple; 1288 } else { 1289 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u", 1290 eth_dev->data->port_id); 1291 eth_dev->tx_pkt_burst = virtio_xmit_pkts; 1292 } 1293 } 1294 1295 /* Only support 1:1 queue/interrupt mapping so far. 1296 * TODO: support n:1 queue/interrupt mapping when there are limited number of 1297 * interrupt vectors (<N+1). 1298 */ 1299 static int 1300 virtio_queues_bind_intr(struct rte_eth_dev *dev) 1301 { 1302 uint32_t i; 1303 struct virtio_hw *hw = dev->data->dev_private; 1304 1305 PMD_INIT_LOG(INFO, "queue/interrupt binding"); 1306 for (i = 0; i < dev->data->nb_rx_queues; ++i) { 1307 dev->intr_handle->intr_vec[i] = i + 1; 1308 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) == 1309 VIRTIO_MSI_NO_VECTOR) { 1310 PMD_DRV_LOG(ERR, "failed to set queue vector"); 1311 return -EBUSY; 1312 } 1313 } 1314 1315 return 0; 1316 } 1317 1318 static void 1319 virtio_queues_unbind_intr(struct rte_eth_dev *dev) 1320 { 1321 uint32_t i; 1322 struct virtio_hw *hw = dev->data->dev_private; 1323 1324 PMD_INIT_LOG(INFO, "queue/interrupt unbinding"); 1325 for (i = 0; i < dev->data->nb_rx_queues; ++i) 1326 VTPCI_OPS(hw)->set_queue_irq(hw, 1327 hw->vqs[i * VTNET_CQ], 1328 VIRTIO_MSI_NO_VECTOR); 1329 } 1330 1331 static int 1332 virtio_configure_intr(struct rte_eth_dev *dev) 1333 { 1334 struct virtio_hw *hw = dev->data->dev_private; 1335 1336 if (!rte_intr_cap_multiple(dev->intr_handle)) { 1337 PMD_INIT_LOG(ERR, "Multiple intr vector not supported"); 1338 return -ENOTSUP; 1339 } 1340 1341 if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) { 1342 PMD_INIT_LOG(ERR, "Fail to create eventfd"); 1343 return -1; 1344 } 1345 1346 if (!dev->intr_handle->intr_vec) { 1347 dev->intr_handle->intr_vec = 1348 rte_zmalloc("intr_vec", 1349 hw->max_queue_pairs * sizeof(int), 0); 1350 if (!dev->intr_handle->intr_vec) { 1351 PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors", 1352 hw->max_queue_pairs); 1353 return -ENOMEM; 1354 } 1355 } 1356 1357 /* Re-register callback to update max_intr */ 1358 rte_intr_callback_unregister(dev->intr_handle, 1359 virtio_interrupt_handler, 1360 dev); 1361 rte_intr_callback_register(dev->intr_handle, 1362 virtio_interrupt_handler, 1363 dev); 1364 1365 /* DO NOT try to remove this! This function will enable msix, or QEMU 1366 * will encounter SIGSEGV when DRIVER_OK is sent. 1367 * And for legacy devices, this should be done before queue/vec binding 1368 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR 1369 * (22) will be ignored. 1370 */ 1371 if (virtio_intr_enable(dev) < 0) { 1372 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1373 return -1; 1374 } 1375 1376 if (virtio_queues_bind_intr(dev) < 0) { 1377 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt"); 1378 return -1; 1379 } 1380 1381 return 0; 1382 } 1383 1384 /* reset device and renegotiate features if needed */ 1385 static int 1386 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) 1387 { 1388 struct virtio_hw *hw = eth_dev->data->dev_private; 1389 struct virtio_net_config *config; 1390 struct virtio_net_config local_config; 1391 struct rte_pci_device *pci_dev = NULL; 1392 int ret; 1393 1394 /* Reset the device although not necessary at startup */ 1395 vtpci_reset(hw); 1396 1397 if (hw->vqs) { 1398 virtio_dev_free_mbufs(eth_dev); 1399 virtio_free_queues(hw); 1400 } 1401 1402 /* Tell the host we've noticed this device. */ 1403 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK); 1404 1405 /* Tell the host we've known how to drive the device. */ 1406 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER); 1407 if (virtio_negotiate_features(hw, req_features) < 0) 1408 return -1; 1409 1410 if (!hw->virtio_user_dev) { 1411 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev); 1412 rte_eth_copy_pci_info(eth_dev, pci_dev); 1413 } 1414 1415 /* If host does not support both status and MSI-X then disable LSC */ 1416 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && 1417 hw->use_msix != VIRTIO_MSIX_NONE) 1418 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC; 1419 else 1420 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC; 1421 1422 /* Setting up rx_header size for the device */ 1423 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || 1424 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) 1425 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); 1426 else 1427 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr); 1428 1429 /* Copy the permanent MAC address to: virtio_hw */ 1430 virtio_get_hwaddr(hw); 1431 ether_addr_copy((struct ether_addr *) hw->mac_addr, 1432 ð_dev->data->mac_addrs[0]); 1433 PMD_INIT_LOG(DEBUG, 1434 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1435 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2], 1436 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]); 1437 1438 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) { 1439 config = &local_config; 1440 1441 vtpci_read_dev_config(hw, 1442 offsetof(struct virtio_net_config, mac), 1443 &config->mac, sizeof(config->mac)); 1444 1445 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1446 vtpci_read_dev_config(hw, 1447 offsetof(struct virtio_net_config, status), 1448 &config->status, sizeof(config->status)); 1449 } else { 1450 PMD_INIT_LOG(DEBUG, 1451 "VIRTIO_NET_F_STATUS is not supported"); 1452 config->status = 0; 1453 } 1454 1455 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) { 1456 vtpci_read_dev_config(hw, 1457 offsetof(struct virtio_net_config, max_virtqueue_pairs), 1458 &config->max_virtqueue_pairs, 1459 sizeof(config->max_virtqueue_pairs)); 1460 } else { 1461 PMD_INIT_LOG(DEBUG, 1462 "VIRTIO_NET_F_MQ is not supported"); 1463 config->max_virtqueue_pairs = 1; 1464 } 1465 1466 hw->max_queue_pairs = config->max_virtqueue_pairs; 1467 1468 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) { 1469 vtpci_read_dev_config(hw, 1470 offsetof(struct virtio_net_config, mtu), 1471 &config->mtu, 1472 sizeof(config->mtu)); 1473 1474 /* 1475 * MTU value has already been checked at negotiation 1476 * time, but check again in case it has changed since 1477 * then, which should not happen. 1478 */ 1479 if (config->mtu < ETHER_MIN_MTU) { 1480 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)", 1481 config->mtu); 1482 return -1; 1483 } 1484 1485 hw->max_mtu = config->mtu; 1486 /* Set initial MTU to maximum one supported by vhost */ 1487 eth_dev->data->mtu = config->mtu; 1488 1489 } else { 1490 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN - 1491 VLAN_TAG_LEN - hw->vtnet_hdr_size; 1492 } 1493 1494 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d", 1495 config->max_virtqueue_pairs); 1496 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status); 1497 PMD_INIT_LOG(DEBUG, 1498 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1499 config->mac[0], config->mac[1], 1500 config->mac[2], config->mac[3], 1501 config->mac[4], config->mac[5]); 1502 } else { 1503 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1"); 1504 hw->max_queue_pairs = 1; 1505 } 1506 1507 ret = virtio_alloc_queues(eth_dev); 1508 if (ret < 0) 1509 return ret; 1510 1511 if (eth_dev->data->dev_conf.intr_conf.rxq) { 1512 if (virtio_configure_intr(eth_dev) < 0) { 1513 PMD_INIT_LOG(ERR, "failed to configure interrupt"); 1514 return -1; 1515 } 1516 } 1517 1518 vtpci_reinit_complete(hw); 1519 1520 if (pci_dev) 1521 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 1522 eth_dev->data->port_id, pci_dev->id.vendor_id, 1523 pci_dev->id.device_id); 1524 1525 return 0; 1526 } 1527 1528 /* 1529 * Remap the PCI device again (IO port map for legacy device and 1530 * memory map for modern device), so that the secondary process 1531 * could have the PCI initiated correctly. 1532 */ 1533 static int 1534 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw) 1535 { 1536 if (hw->modern) { 1537 /* 1538 * We don't have to re-parse the PCI config space, since 1539 * rte_pci_map_device() makes sure the mapped address 1540 * in secondary process would equal to the one mapped in 1541 * the primary process: error will be returned if that 1542 * requirement is not met. 1543 * 1544 * That said, we could simply reuse all cap pointers 1545 * (such as dev_cfg, common_cfg, etc.) parsed from the 1546 * primary process, which is stored in shared memory. 1547 */ 1548 if (rte_pci_map_device(pci_dev)) { 1549 PMD_INIT_LOG(DEBUG, "failed to map pci device!"); 1550 return -1; 1551 } 1552 } else { 1553 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0) 1554 return -1; 1555 } 1556 1557 return 0; 1558 } 1559 1560 static void 1561 virtio_set_vtpci_ops(struct virtio_hw *hw) 1562 { 1563 #ifdef RTE_VIRTIO_USER 1564 if (hw->virtio_user_dev) 1565 VTPCI_OPS(hw) = &virtio_user_ops; 1566 else 1567 #endif 1568 if (hw->modern) 1569 VTPCI_OPS(hw) = &modern_ops; 1570 else 1571 VTPCI_OPS(hw) = &legacy_ops; 1572 } 1573 1574 /* 1575 * This function is based on probe() function in virtio_pci.c 1576 * It returns 0 on success. 1577 */ 1578 int 1579 eth_virtio_dev_init(struct rte_eth_dev *eth_dev) 1580 { 1581 struct virtio_hw *hw = eth_dev->data->dev_private; 1582 int ret; 1583 1584 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf)); 1585 1586 eth_dev->dev_ops = &virtio_eth_dev_ops; 1587 1588 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1589 if (!hw->virtio_user_dev) { 1590 ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1591 if (ret) 1592 return ret; 1593 } 1594 1595 virtio_set_vtpci_ops(hw); 1596 set_rxtx_funcs(eth_dev); 1597 1598 return 0; 1599 } 1600 1601 /* Allocate memory for storing MAC addresses */ 1602 eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0); 1603 if (eth_dev->data->mac_addrs == NULL) { 1604 PMD_INIT_LOG(ERR, 1605 "Failed to allocate %d bytes needed to store MAC addresses", 1606 VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN); 1607 return -ENOMEM; 1608 } 1609 1610 hw->port_id = eth_dev->data->port_id; 1611 /* For virtio_user case the hw->virtio_user_dev is populated by 1612 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called. 1613 */ 1614 if (!hw->virtio_user_dev) { 1615 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw); 1616 if (ret) 1617 goto out; 1618 } 1619 1620 /* reset device and negotiate default features */ 1621 ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES); 1622 if (ret < 0) 1623 goto out; 1624 1625 /* Setup interrupt callback */ 1626 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1627 rte_intr_callback_register(eth_dev->intr_handle, 1628 virtio_interrupt_handler, eth_dev); 1629 1630 return 0; 1631 1632 out: 1633 rte_free(eth_dev->data->mac_addrs); 1634 return ret; 1635 } 1636 1637 static int 1638 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev) 1639 { 1640 PMD_INIT_FUNC_TRACE(); 1641 1642 if (rte_eal_process_type() == RTE_PROC_SECONDARY) 1643 return -EPERM; 1644 1645 virtio_dev_stop(eth_dev); 1646 virtio_dev_close(eth_dev); 1647 1648 eth_dev->dev_ops = NULL; 1649 eth_dev->tx_pkt_burst = NULL; 1650 eth_dev->rx_pkt_burst = NULL; 1651 1652 rte_free(eth_dev->data->mac_addrs); 1653 eth_dev->data->mac_addrs = NULL; 1654 1655 /* reset interrupt callback */ 1656 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1657 rte_intr_callback_unregister(eth_dev->intr_handle, 1658 virtio_interrupt_handler, 1659 eth_dev); 1660 if (eth_dev->device) 1661 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev)); 1662 1663 PMD_INIT_LOG(DEBUG, "dev_uninit completed"); 1664 1665 return 0; 1666 } 1667 1668 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, 1669 struct rte_pci_device *pci_dev) 1670 { 1671 return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw), 1672 eth_virtio_dev_init); 1673 } 1674 1675 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev) 1676 { 1677 return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit); 1678 } 1679 1680 static struct rte_pci_driver rte_virtio_pmd = { 1681 .driver = { 1682 .name = "net_virtio", 1683 }, 1684 .id_table = pci_id_virtio_map, 1685 .drv_flags = 0, 1686 .probe = eth_virtio_pci_probe, 1687 .remove = eth_virtio_pci_remove, 1688 }; 1689 1690 RTE_INIT(rte_virtio_pmd_init); 1691 static void 1692 rte_virtio_pmd_init(void) 1693 { 1694 if (rte_eal_iopl_init() != 0) { 1695 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD"); 1696 return; 1697 } 1698 1699 rte_pci_register(&rte_virtio_pmd); 1700 } 1701 1702 /* 1703 * Configure virtio device 1704 * It returns 0 on success. 1705 */ 1706 static int 1707 virtio_dev_configure(struct rte_eth_dev *dev) 1708 { 1709 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 1710 struct virtio_hw *hw = dev->data->dev_private; 1711 uint64_t req_features; 1712 int ret; 1713 1714 PMD_INIT_LOG(DEBUG, "configure"); 1715 req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES; 1716 1717 if (dev->data->dev_conf.intr_conf.rxq) { 1718 ret = virtio_init_device(dev, hw->req_guest_features); 1719 if (ret < 0) 1720 return ret; 1721 } 1722 1723 /* The name hw_ip_checksum is a bit confusing since it can be 1724 * set by the application to request L3 and/or L4 checksums. In 1725 * case of virtio, only L4 checksum is supported. 1726 */ 1727 if (rxmode->hw_ip_checksum) 1728 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM); 1729 1730 if (rxmode->enable_lro) 1731 req_features |= 1732 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 1733 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 1734 1735 /* if request features changed, reinit the device */ 1736 if (req_features != hw->req_guest_features) { 1737 ret = virtio_init_device(dev, req_features); 1738 if (ret < 0) 1739 return ret; 1740 } 1741 1742 if (rxmode->hw_ip_checksum && 1743 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) { 1744 PMD_DRV_LOG(ERR, 1745 "rx checksum not available on this host"); 1746 return -ENOTSUP; 1747 } 1748 1749 if (rxmode->enable_lro && 1750 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) || 1751 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) { 1752 PMD_DRV_LOG(ERR, 1753 "Large Receive Offload not available on this host"); 1754 return -ENOTSUP; 1755 } 1756 1757 /* start control queue */ 1758 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) 1759 virtio_dev_cq_start(dev); 1760 1761 hw->vlan_strip = rxmode->hw_vlan_strip; 1762 1763 if (rxmode->hw_vlan_filter 1764 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 1765 PMD_DRV_LOG(ERR, 1766 "vlan filtering not available on this host"); 1767 return -ENOTSUP; 1768 } 1769 1770 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) 1771 /* Enable vector (0) for Link State Intrerrupt */ 1772 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) == 1773 VIRTIO_MSI_NO_VECTOR) { 1774 PMD_DRV_LOG(ERR, "failed to set config vector"); 1775 return -EBUSY; 1776 } 1777 1778 hw->use_simple_rx = 1; 1779 hw->use_simple_tx = 1; 1780 1781 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM 1782 if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) { 1783 hw->use_simple_rx = 0; 1784 hw->use_simple_tx = 0; 1785 } 1786 #endif 1787 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1788 hw->use_simple_rx = 0; 1789 hw->use_simple_tx = 0; 1790 } 1791 1792 if (rxmode->hw_ip_checksum) 1793 hw->use_simple_rx = 0; 1794 1795 return 0; 1796 } 1797 1798 1799 static int 1800 virtio_dev_start(struct rte_eth_dev *dev) 1801 { 1802 uint16_t nb_queues, i; 1803 struct virtnet_rx *rxvq; 1804 struct virtnet_tx *txvq __rte_unused; 1805 struct virtio_hw *hw = dev->data->dev_private; 1806 int ret; 1807 1808 /* Finish the initialization of the queues */ 1809 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1810 ret = virtio_dev_rx_queue_setup_finish(dev, i); 1811 if (ret < 0) 1812 return ret; 1813 } 1814 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1815 ret = virtio_dev_tx_queue_setup_finish(dev, i); 1816 if (ret < 0) 1817 return ret; 1818 } 1819 1820 /* check if lsc interrupt feature is enabled */ 1821 if (dev->data->dev_conf.intr_conf.lsc) { 1822 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) { 1823 PMD_DRV_LOG(ERR, "link status not supported by host"); 1824 return -ENOTSUP; 1825 } 1826 } 1827 1828 /* Enable uio/vfio intr/eventfd mapping: althrough we already did that 1829 * in device configure, but it could be unmapped when device is 1830 * stopped. 1831 */ 1832 if (dev->data->dev_conf.intr_conf.lsc || 1833 dev->data->dev_conf.intr_conf.rxq) { 1834 virtio_intr_disable(dev); 1835 1836 if (virtio_intr_enable(dev) < 0) { 1837 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1838 return -EIO; 1839 } 1840 } 1841 1842 /*Notify the backend 1843 *Otherwise the tap backend might already stop its queue due to fullness. 1844 *vhost backend will have no chance to be waked up 1845 */ 1846 nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues); 1847 if (hw->max_queue_pairs > 1) { 1848 if (virtio_set_multiple_queues(dev, nb_queues) != 0) 1849 return -EINVAL; 1850 } 1851 1852 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues); 1853 1854 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1855 rxvq = dev->data->rx_queues[i]; 1856 /* Flush the old packets */ 1857 virtqueue_rxvq_flush(rxvq->vq); 1858 virtqueue_notify(rxvq->vq); 1859 } 1860 1861 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1862 txvq = dev->data->tx_queues[i]; 1863 virtqueue_notify(txvq->vq); 1864 } 1865 1866 PMD_INIT_LOG(DEBUG, "Notified backend at initialization"); 1867 1868 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1869 rxvq = dev->data->rx_queues[i]; 1870 VIRTQUEUE_DUMP(rxvq->vq); 1871 } 1872 1873 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1874 txvq = dev->data->tx_queues[i]; 1875 VIRTQUEUE_DUMP(txvq->vq); 1876 } 1877 1878 set_rxtx_funcs(dev); 1879 hw->started = 1; 1880 1881 /* Initialize Link state */ 1882 virtio_dev_link_update(dev, 0); 1883 1884 return 0; 1885 } 1886 1887 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev) 1888 { 1889 struct rte_mbuf *buf; 1890 int i, mbuf_num = 0; 1891 1892 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1893 struct virtnet_rx *rxvq = dev->data->rx_queues[i]; 1894 1895 if (rxvq == NULL || rxvq->vq == NULL) 1896 continue; 1897 1898 PMD_INIT_LOG(DEBUG, 1899 "Before freeing rxq[%d] used and unused buf", i); 1900 VIRTQUEUE_DUMP(rxvq->vq); 1901 1902 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq); 1903 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) { 1904 rte_pktmbuf_free(buf); 1905 mbuf_num++; 1906 } 1907 1908 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num); 1909 PMD_INIT_LOG(DEBUG, 1910 "After freeing rxq[%d] used and unused buf", i); 1911 VIRTQUEUE_DUMP(rxvq->vq); 1912 } 1913 1914 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1915 struct virtnet_tx *txvq = dev->data->tx_queues[i]; 1916 1917 if (txvq == NULL || txvq->vq == NULL) 1918 continue; 1919 1920 PMD_INIT_LOG(DEBUG, 1921 "Before freeing txq[%d] used and unused bufs", 1922 i); 1923 VIRTQUEUE_DUMP(txvq->vq); 1924 1925 mbuf_num = 0; 1926 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) { 1927 rte_pktmbuf_free(buf); 1928 mbuf_num++; 1929 } 1930 1931 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num); 1932 PMD_INIT_LOG(DEBUG, 1933 "After freeing txq[%d] used and unused buf", i); 1934 VIRTQUEUE_DUMP(txvq->vq); 1935 } 1936 } 1937 1938 /* 1939 * Stop device: disable interrupt and mark link down 1940 */ 1941 static void 1942 virtio_dev_stop(struct rte_eth_dev *dev) 1943 { 1944 struct virtio_hw *hw = dev->data->dev_private; 1945 struct rte_eth_link link; 1946 struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf; 1947 1948 PMD_INIT_LOG(DEBUG, "stop"); 1949 1950 if (intr_conf->lsc || intr_conf->rxq) 1951 virtio_intr_disable(dev); 1952 1953 hw->started = 0; 1954 memset(&link, 0, sizeof(link)); 1955 virtio_dev_atomic_write_link_status(dev, &link); 1956 } 1957 1958 static int 1959 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete) 1960 { 1961 struct rte_eth_link link, old; 1962 uint16_t status; 1963 struct virtio_hw *hw = dev->data->dev_private; 1964 memset(&link, 0, sizeof(link)); 1965 virtio_dev_atomic_read_link_status(dev, &link); 1966 old = link; 1967 link.link_duplex = ETH_LINK_FULL_DUPLEX; 1968 link.link_speed = SPEED_10G; 1969 1970 if (hw->started == 0) { 1971 link.link_status = ETH_LINK_DOWN; 1972 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1973 PMD_INIT_LOG(DEBUG, "Get link status from hw"); 1974 vtpci_read_dev_config(hw, 1975 offsetof(struct virtio_net_config, status), 1976 &status, sizeof(status)); 1977 if ((status & VIRTIO_NET_S_LINK_UP) == 0) { 1978 link.link_status = ETH_LINK_DOWN; 1979 PMD_INIT_LOG(DEBUG, "Port %d is down", 1980 dev->data->port_id); 1981 } else { 1982 link.link_status = ETH_LINK_UP; 1983 PMD_INIT_LOG(DEBUG, "Port %d is up", 1984 dev->data->port_id); 1985 } 1986 } else { 1987 link.link_status = ETH_LINK_UP; 1988 } 1989 virtio_dev_atomic_write_link_status(dev, &link); 1990 1991 return (old.link_status == link.link_status) ? -1 : 0; 1992 } 1993 1994 static int 1995 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask) 1996 { 1997 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 1998 struct virtio_hw *hw = dev->data->dev_private; 1999 2000 if (mask & ETH_VLAN_FILTER_MASK) { 2001 if (rxmode->hw_vlan_filter && 2002 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 2003 2004 PMD_DRV_LOG(NOTICE, 2005 "vlan filtering not available on this host"); 2006 2007 return -ENOTSUP; 2008 } 2009 } 2010 2011 if (mask & ETH_VLAN_STRIP_MASK) 2012 hw->vlan_strip = rxmode->hw_vlan_strip; 2013 2014 return 0; 2015 } 2016 2017 static void 2018 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) 2019 { 2020 uint64_t tso_mask, host_features; 2021 struct virtio_hw *hw = dev->data->dev_private; 2022 2023 dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */ 2024 2025 dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL; 2026 dev_info->max_rx_queues = 2027 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES); 2028 dev_info->max_tx_queues = 2029 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES); 2030 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE; 2031 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN; 2032 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS; 2033 dev_info->default_txconf = (struct rte_eth_txconf) { 2034 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS 2035 }; 2036 2037 host_features = VTPCI_OPS(hw)->get_features(hw); 2038 dev_info->rx_offload_capa = 0; 2039 if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) { 2040 dev_info->rx_offload_capa |= 2041 DEV_RX_OFFLOAD_TCP_CKSUM | 2042 DEV_RX_OFFLOAD_UDP_CKSUM; 2043 } 2044 tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 2045 (1ULL << VIRTIO_NET_F_GUEST_TSO6); 2046 if ((host_features & tso_mask) == tso_mask) 2047 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO; 2048 2049 dev_info->tx_offload_capa = 0; 2050 if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) { 2051 dev_info->tx_offload_capa |= 2052 DEV_TX_OFFLOAD_UDP_CKSUM | 2053 DEV_TX_OFFLOAD_TCP_CKSUM; 2054 } 2055 tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) | 2056 (1ULL << VIRTIO_NET_F_HOST_TSO6); 2057 if ((hw->guest_features & tso_mask) == tso_mask) 2058 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO; 2059 } 2060 2061 /* 2062 * It enables testpmd to collect per queue stats. 2063 */ 2064 static int 2065 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev, 2066 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx, 2067 __rte_unused uint8_t is_rx) 2068 { 2069 return 0; 2070 } 2071 2072 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__); 2073 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map); 2074 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci"); 2075