1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2014 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 #ifdef RTE_EXEC_ENV_LINUXAPP 40 #include <dirent.h> 41 #include <fcntl.h> 42 #endif 43 44 #include <rte_ethdev.h> 45 #include <rte_memcpy.h> 46 #include <rte_string_fns.h> 47 #include <rte_memzone.h> 48 #include <rte_malloc.h> 49 #include <rte_atomic.h> 50 #include <rte_branch_prediction.h> 51 #include <rte_pci.h> 52 #include <rte_ether.h> 53 #include <rte_common.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 64 65 static int eth_virtio_dev_init(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 __rte_unused int wait_to_complete); 77 78 static void virtio_set_hwaddr(struct virtio_hw *hw); 79 static void virtio_get_hwaddr(struct virtio_hw *hw); 80 81 static void virtio_dev_rx_queue_release(__rte_unused void *rxq); 82 static void virtio_dev_tx_queue_release(__rte_unused void *txq); 83 84 static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats); 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[] = { 106 107 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)}, 108 #include "rte_pci_dev_ids.h" 109 110 { .vendor_id = 0, /* sentinel */ }, 111 }; 112 113 static int 114 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl, 115 int *dlen, int pkt_num) 116 { 117 uint32_t head, i; 118 int k, sum = 0; 119 virtio_net_ctrl_ack status = ~0; 120 struct virtio_pmd_ctrl result; 121 122 ctrl->status = status; 123 124 if (!(vq && vq->hw->cvq)) { 125 PMD_INIT_LOG(ERR, 126 "%s(): Control queue is not supported.", 127 __func__); 128 return -1; 129 } 130 head = vq->vq_desc_head_idx; 131 132 PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, " 133 "vq->hw->cvq = %p vq = %p", 134 vq->vq_desc_head_idx, status, vq->hw->cvq, vq); 135 136 if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1)) 137 return -1; 138 139 memcpy(vq->virtio_net_hdr_mz->addr, ctrl, 140 sizeof(struct virtio_pmd_ctrl)); 141 142 /* 143 * Format is enforced in qemu code: 144 * One TX packet for header; 145 * At least one TX packet per argument; 146 * One RX packet for ACK. 147 */ 148 vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT; 149 vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr; 150 vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr); 151 vq->vq_free_cnt--; 152 i = vq->vq_ring.desc[head].next; 153 154 for (k = 0; k < pkt_num; k++) { 155 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT; 156 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr 157 + sizeof(struct virtio_net_ctrl_hdr) 158 + sizeof(ctrl->status) + sizeof(uint8_t)*sum; 159 vq->vq_ring.desc[i].len = dlen[k]; 160 sum += dlen[k]; 161 vq->vq_free_cnt--; 162 i = vq->vq_ring.desc[i].next; 163 } 164 165 vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE; 166 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr 167 + sizeof(struct virtio_net_ctrl_hdr); 168 vq->vq_ring.desc[i].len = sizeof(ctrl->status); 169 vq->vq_free_cnt--; 170 171 vq->vq_desc_head_idx = vq->vq_ring.desc[i].next; 172 173 vq_update_avail_ring(vq, head); 174 vq_update_avail_idx(vq); 175 176 PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index); 177 178 virtqueue_notify(vq); 179 180 rte_rmb(); 181 while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) { 182 rte_rmb(); 183 usleep(100); 184 } 185 186 while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) { 187 uint32_t idx, desc_idx, used_idx; 188 struct vring_used_elem *uep; 189 190 used_idx = (uint32_t)(vq->vq_used_cons_idx 191 & (vq->vq_nentries - 1)); 192 uep = &vq->vq_ring.used->ring[used_idx]; 193 idx = (uint32_t) uep->id; 194 desc_idx = idx; 195 196 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) { 197 desc_idx = vq->vq_ring.desc[desc_idx].next; 198 vq->vq_free_cnt++; 199 } 200 201 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx; 202 vq->vq_desc_head_idx = idx; 203 204 vq->vq_used_cons_idx++; 205 vq->vq_free_cnt++; 206 } 207 208 PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d", 209 vq->vq_free_cnt, vq->vq_desc_head_idx); 210 211 memcpy(&result, vq->virtio_net_hdr_mz->addr, 212 sizeof(struct virtio_pmd_ctrl)); 213 214 return result.status; 215 } 216 217 static int 218 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues) 219 { 220 struct virtio_hw *hw = dev->data->dev_private; 221 struct virtio_pmd_ctrl ctrl; 222 int dlen[1]; 223 int ret; 224 225 ctrl.hdr.class = VIRTIO_NET_CTRL_MQ; 226 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET; 227 memcpy(ctrl.data, &nb_queues, sizeof(uint16_t)); 228 229 dlen[0] = sizeof(uint16_t); 230 231 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 232 if (ret) { 233 PMD_INIT_LOG(ERR, "Multiqueue configured but send command " 234 "failed, this is too late now..."); 235 return -EINVAL; 236 } 237 238 return 0; 239 } 240 241 int virtio_dev_queue_setup(struct rte_eth_dev *dev, 242 int queue_type, 243 uint16_t queue_idx, 244 uint16_t vtpci_queue_idx, 245 uint16_t nb_desc, 246 unsigned int socket_id, 247 struct virtqueue **pvq) 248 { 249 char vq_name[VIRTQUEUE_MAX_NAME_SZ]; 250 const struct rte_memzone *mz; 251 uint16_t vq_size; 252 int size; 253 struct virtio_hw *hw = dev->data->dev_private; 254 struct virtqueue *vq = NULL; 255 256 /* Write the virtqueue index to the Queue Select Field */ 257 VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx); 258 PMD_INIT_LOG(DEBUG, "selecting queue: %d", vtpci_queue_idx); 259 260 /* 261 * Read the virtqueue size from the Queue Size field 262 * Always power of 2 and if 0 virtqueue does not exist 263 */ 264 vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM); 265 PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d", vq_size, nb_desc); 266 if (nb_desc == 0) 267 nb_desc = vq_size; 268 if (vq_size == 0) { 269 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__); 270 return -EINVAL; 271 } 272 273 if (!rte_is_power_of_2(vq_size)) { 274 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__); 275 return -EINVAL; 276 } 277 278 if (nb_desc < vq_size) { 279 if (!rte_is_power_of_2(nb_desc)) { 280 PMD_INIT_LOG(ERR, 281 "nb_desc(%u) size is not powerof 2", 282 nb_desc); 283 return -EINVAL; 284 } 285 vq_size = nb_desc; 286 } 287 288 if (queue_type == VTNET_RQ) { 289 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d", 290 dev->data->port_id, queue_idx); 291 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) + 292 vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE); 293 } else if (queue_type == VTNET_TQ) { 294 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d", 295 dev->data->port_id, queue_idx); 296 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) + 297 vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE); 298 } else if (queue_type == VTNET_CQ) { 299 snprintf(vq_name, sizeof(vq_name), "port%d_cvq", 300 dev->data->port_id); 301 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) + 302 vq_size * sizeof(struct vq_desc_extra), 303 RTE_CACHE_LINE_SIZE); 304 } 305 if (vq == NULL) { 306 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__); 307 return (-ENOMEM); 308 } 309 310 vq->hw = hw; 311 vq->port_id = dev->data->port_id; 312 vq->queue_id = queue_idx; 313 vq->vq_queue_index = vtpci_queue_idx; 314 vq->vq_nentries = vq_size; 315 vq->vq_free_cnt = vq_size; 316 317 /* 318 * Reserve a memzone for vring elements 319 */ 320 size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN); 321 vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN); 322 PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size); 323 324 mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size, 325 socket_id, 0, VIRTIO_PCI_VRING_ALIGN); 326 if (mz == NULL) { 327 rte_free(vq); 328 return -ENOMEM; 329 } 330 331 /* 332 * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit, 333 * and only accepts 32 bit page frame number. 334 * Check if the allocated physical memory exceeds 16TB. 335 */ 336 if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) { 337 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!"); 338 rte_free(vq); 339 return -ENOMEM; 340 } 341 342 memset(mz->addr, 0, sizeof(mz->len)); 343 vq->mz = mz; 344 vq->vq_ring_mem = mz->phys_addr; 345 vq->vq_ring_virt_mem = mz->addr; 346 PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%"PRIx64, (uint64_t)mz->phys_addr); 347 PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr); 348 vq->virtio_net_hdr_mz = NULL; 349 vq->virtio_net_hdr_mem = 0; 350 351 if (queue_type == VTNET_TQ) { 352 /* 353 * For each xmit packet, allocate a virtio_net_hdr 354 */ 355 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone", 356 dev->data->port_id, queue_idx); 357 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name, 358 vq_size * hw->vtnet_hdr_size, 359 socket_id, 0, RTE_CACHE_LINE_SIZE); 360 if (vq->virtio_net_hdr_mz == NULL) { 361 rte_free(vq); 362 return -ENOMEM; 363 } 364 vq->virtio_net_hdr_mem = 365 vq->virtio_net_hdr_mz->phys_addr; 366 memset(vq->virtio_net_hdr_mz->addr, 0, 367 vq_size * hw->vtnet_hdr_size); 368 } else if (queue_type == VTNET_CQ) { 369 /* Allocate a page for control vq command, data and status */ 370 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone", 371 dev->data->port_id); 372 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name, 373 PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE); 374 if (vq->virtio_net_hdr_mz == NULL) { 375 rte_free(vq); 376 return -ENOMEM; 377 } 378 vq->virtio_net_hdr_mem = 379 vq->virtio_net_hdr_mz->phys_addr; 380 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE); 381 } 382 383 /* 384 * Set guest physical address of the virtqueue 385 * in VIRTIO_PCI_QUEUE_PFN config register of device 386 */ 387 VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN, 388 mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT); 389 *pvq = vq; 390 return 0; 391 } 392 393 static int 394 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx, 395 uint32_t socket_id) 396 { 397 struct virtqueue *vq; 398 uint16_t nb_desc = 0; 399 int ret; 400 struct virtio_hw *hw = dev->data->dev_private; 401 402 PMD_INIT_FUNC_TRACE(); 403 ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX, 404 vtpci_queue_idx, nb_desc, socket_id, &vq); 405 if (ret < 0) { 406 PMD_INIT_LOG(ERR, "control vq initialization failed"); 407 return ret; 408 } 409 410 hw->cvq = vq; 411 return 0; 412 } 413 414 static void 415 virtio_dev_close(struct rte_eth_dev *dev) 416 { 417 struct virtio_hw *hw = dev->data->dev_private; 418 struct rte_pci_device *pci_dev = dev->pci_dev; 419 420 PMD_INIT_LOG(DEBUG, "virtio_dev_close"); 421 422 /* reset the NIC */ 423 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC) 424 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR); 425 vtpci_reset(hw); 426 hw->started = 0; 427 virtio_dev_free_mbufs(dev); 428 } 429 430 static void 431 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev) 432 { 433 struct virtio_hw *hw = dev->data->dev_private; 434 struct virtio_pmd_ctrl ctrl; 435 int dlen[1]; 436 int ret; 437 438 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 439 PMD_INIT_LOG(INFO, "host does not support rx control\n"); 440 return; 441 } 442 443 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 444 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 445 ctrl.data[0] = 1; 446 dlen[0] = 1; 447 448 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 449 if (ret) 450 PMD_INIT_LOG(ERR, "Failed to enable promisc"); 451 } 452 453 static void 454 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev) 455 { 456 struct virtio_hw *hw = dev->data->dev_private; 457 struct virtio_pmd_ctrl ctrl; 458 int dlen[1]; 459 int ret; 460 461 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 462 PMD_INIT_LOG(INFO, "host does not support rx control\n"); 463 return; 464 } 465 466 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 467 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC; 468 ctrl.data[0] = 0; 469 dlen[0] = 1; 470 471 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 472 if (ret) 473 PMD_INIT_LOG(ERR, "Failed to disable promisc"); 474 } 475 476 static void 477 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev) 478 { 479 struct virtio_hw *hw = dev->data->dev_private; 480 struct virtio_pmd_ctrl ctrl; 481 int dlen[1]; 482 int ret; 483 484 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 485 PMD_INIT_LOG(INFO, "host does not support rx control\n"); 486 return; 487 } 488 489 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 490 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 491 ctrl.data[0] = 1; 492 dlen[0] = 1; 493 494 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 495 if (ret) 496 PMD_INIT_LOG(ERR, "Failed to enable allmulticast"); 497 } 498 499 static void 500 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev) 501 { 502 struct virtio_hw *hw = dev->data->dev_private; 503 struct virtio_pmd_ctrl ctrl; 504 int dlen[1]; 505 int ret; 506 507 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) { 508 PMD_INIT_LOG(INFO, "host does not support rx control\n"); 509 return; 510 } 511 512 ctrl.hdr.class = VIRTIO_NET_CTRL_RX; 513 ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI; 514 ctrl.data[0] = 0; 515 dlen[0] = 1; 516 517 ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1); 518 if (ret) 519 PMD_INIT_LOG(ERR, "Failed to disable allmulticast"); 520 } 521 522 /* 523 * dev_ops for virtio, bare necessities for basic operation 524 */ 525 static const struct eth_dev_ops virtio_eth_dev_ops = { 526 .dev_configure = virtio_dev_configure, 527 .dev_start = virtio_dev_start, 528 .dev_stop = virtio_dev_stop, 529 .dev_close = virtio_dev_close, 530 .promiscuous_enable = virtio_dev_promiscuous_enable, 531 .promiscuous_disable = virtio_dev_promiscuous_disable, 532 .allmulticast_enable = virtio_dev_allmulticast_enable, 533 .allmulticast_disable = virtio_dev_allmulticast_disable, 534 535 .dev_infos_get = virtio_dev_info_get, 536 .stats_get = virtio_dev_stats_get, 537 .stats_reset = virtio_dev_stats_reset, 538 .link_update = virtio_dev_link_update, 539 .rx_queue_setup = virtio_dev_rx_queue_setup, 540 /* meaningfull only to multiple queue */ 541 .rx_queue_release = virtio_dev_rx_queue_release, 542 .tx_queue_setup = virtio_dev_tx_queue_setup, 543 /* meaningfull only to multiple queue */ 544 .tx_queue_release = virtio_dev_tx_queue_release, 545 /* collect stats per queue */ 546 .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set, 547 .vlan_filter_set = virtio_vlan_filter_set, 548 .mac_addr_add = virtio_mac_addr_add, 549 .mac_addr_remove = virtio_mac_addr_remove, 550 .mac_addr_set = virtio_mac_addr_set, 551 }; 552 553 static inline int 554 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev, 555 struct rte_eth_link *link) 556 { 557 struct rte_eth_link *dst = link; 558 struct rte_eth_link *src = &(dev->data->dev_link); 559 560 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 561 *(uint64_t *)src) == 0) 562 return -1; 563 564 return 0; 565 } 566 567 /** 568 * Atomically writes the link status information into global 569 * structure rte_eth_dev. 570 * 571 * @param dev 572 * - Pointer to the structure rte_eth_dev to read from. 573 * - Pointer to the buffer to be saved with the link status. 574 * 575 * @return 576 * - On success, zero. 577 * - On failure, negative value. 578 */ 579 static inline int 580 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev, 581 struct rte_eth_link *link) 582 { 583 struct rte_eth_link *dst = &(dev->data->dev_link); 584 struct rte_eth_link *src = link; 585 586 if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst, 587 *(uint64_t *)src) == 0) 588 return -1; 589 590 return 0; 591 } 592 593 static void 594 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 595 { 596 unsigned i; 597 598 for (i = 0; i < dev->data->nb_tx_queues; i++) { 599 const struct virtqueue *txvq = dev->data->tx_queues[i]; 600 if (txvq == NULL) 601 continue; 602 603 stats->opackets += txvq->packets; 604 stats->obytes += txvq->bytes; 605 stats->oerrors += txvq->errors; 606 607 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 608 stats->q_opackets[i] = txvq->packets; 609 stats->q_obytes[i] = txvq->bytes; 610 } 611 } 612 613 for (i = 0; i < dev->data->nb_rx_queues; i++) { 614 const struct virtqueue *rxvq = dev->data->rx_queues[i]; 615 if (rxvq == NULL) 616 continue; 617 618 stats->ipackets += rxvq->packets; 619 stats->ibytes += rxvq->bytes; 620 stats->ierrors += rxvq->errors; 621 622 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 623 stats->q_ipackets[i] = rxvq->packets; 624 stats->q_ibytes[i] = rxvq->bytes; 625 } 626 } 627 628 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed; 629 } 630 631 static void 632 virtio_dev_stats_reset(struct rte_eth_dev *dev) 633 { 634 unsigned int i; 635 636 for (i = 0; i < dev->data->nb_tx_queues; i++) { 637 struct virtqueue *txvq = dev->data->tx_queues[i]; 638 if (txvq == NULL) 639 continue; 640 641 txvq->packets = 0; 642 txvq->bytes = 0; 643 txvq->errors = 0; 644 } 645 646 for (i = 0; i < dev->data->nb_rx_queues; i++) { 647 struct virtqueue *rxvq = dev->data->rx_queues[i]; 648 if (rxvq == NULL) 649 continue; 650 651 rxvq->packets = 0; 652 rxvq->bytes = 0; 653 rxvq->errors = 0; 654 } 655 656 dev->data->rx_mbuf_alloc_failed = 0; 657 } 658 659 static void 660 virtio_set_hwaddr(struct virtio_hw *hw) 661 { 662 vtpci_write_dev_config(hw, 663 offsetof(struct virtio_net_config, mac), 664 &hw->mac_addr, ETHER_ADDR_LEN); 665 } 666 667 static void 668 virtio_get_hwaddr(struct virtio_hw *hw) 669 { 670 if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) { 671 vtpci_read_dev_config(hw, 672 offsetof(struct virtio_net_config, mac), 673 &hw->mac_addr, ETHER_ADDR_LEN); 674 } else { 675 eth_random_addr(&hw->mac_addr[0]); 676 virtio_set_hwaddr(hw); 677 } 678 } 679 680 static void 681 virtio_mac_table_set(struct virtio_hw *hw, 682 const struct virtio_net_ctrl_mac *uc, 683 const struct virtio_net_ctrl_mac *mc) 684 { 685 struct virtio_pmd_ctrl ctrl; 686 int err, len[2]; 687 688 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 689 PMD_DRV_LOG(INFO, "host does not support mac table\n"); 690 return; 691 } 692 693 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 694 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 695 696 len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries); 697 memcpy(ctrl.data, uc, len[0]); 698 699 len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries); 700 memcpy(ctrl.data + len[0], mc, len[1]); 701 702 err = virtio_send_command(hw->cvq, &ctrl, len, 2); 703 if (err != 0) 704 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err); 705 } 706 707 static void 708 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr, 709 uint32_t index, uint32_t vmdq __rte_unused) 710 { 711 struct virtio_hw *hw = dev->data->dev_private; 712 const struct ether_addr *addrs = dev->data->mac_addrs; 713 unsigned int i; 714 struct virtio_net_ctrl_mac *uc, *mc; 715 716 if (index >= VIRTIO_MAX_MAC_ADDRS) { 717 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 718 return; 719 } 720 721 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 722 uc->entries = 0; 723 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 724 mc->entries = 0; 725 726 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 727 const struct ether_addr *addr 728 = (i == index) ? mac_addr : addrs + i; 729 struct virtio_net_ctrl_mac *tbl 730 = is_multicast_ether_addr(addr) ? mc : uc; 731 732 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN); 733 } 734 735 virtio_mac_table_set(hw, uc, mc); 736 } 737 738 static void 739 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index) 740 { 741 struct virtio_hw *hw = dev->data->dev_private; 742 struct ether_addr *addrs = dev->data->mac_addrs; 743 struct virtio_net_ctrl_mac *uc, *mc; 744 unsigned int i; 745 746 if (index >= VIRTIO_MAX_MAC_ADDRS) { 747 PMD_DRV_LOG(ERR, "mac address index %u out of range", index); 748 return; 749 } 750 751 uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries)); 752 uc->entries = 0; 753 mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries)); 754 mc->entries = 0; 755 756 for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) { 757 struct virtio_net_ctrl_mac *tbl; 758 759 if (i == index || is_zero_ether_addr(addrs + i)) 760 continue; 761 762 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc; 763 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN); 764 } 765 766 virtio_mac_table_set(hw, uc, mc); 767 } 768 769 static void 770 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr) 771 { 772 struct virtio_hw *hw = dev->data->dev_private; 773 774 memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN); 775 776 /* Use atomic update if available */ 777 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 778 struct virtio_pmd_ctrl ctrl; 779 int len = ETHER_ADDR_LEN; 780 781 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC; 782 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; 783 784 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN); 785 virtio_send_command(hw->cvq, &ctrl, &len, 1); 786 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) 787 virtio_set_hwaddr(hw); 788 } 789 790 static int 791 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 792 { 793 struct virtio_hw *hw = dev->data->dev_private; 794 struct virtio_pmd_ctrl ctrl; 795 int len; 796 797 if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) 798 return -ENOTSUP; 799 800 ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN; 801 ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; 802 memcpy(ctrl.data, &vlan_id, sizeof(vlan_id)); 803 len = sizeof(vlan_id); 804 805 return virtio_send_command(hw->cvq, &ctrl, &len, 1); 806 } 807 808 static void 809 virtio_negotiate_features(struct virtio_hw *hw) 810 { 811 uint32_t host_features; 812 813 /* Prepare guest_features: feature that driver wants to support */ 814 hw->guest_features = VIRTIO_PMD_GUEST_FEATURES; 815 PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x", 816 hw->guest_features); 817 818 /* Read device(host) feature bits */ 819 host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES); 820 PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x", 821 host_features); 822 823 /* 824 * Negotiate features: Subset of device feature bits are written back 825 * guest feature bits. 826 */ 827 hw->guest_features = vtpci_negotiate_features(hw, host_features); 828 PMD_INIT_LOG(DEBUG, "features after negotiate = %x", 829 hw->guest_features); 830 } 831 832 #ifdef RTE_EXEC_ENV_LINUXAPP 833 static int 834 parse_sysfs_value(const char *filename, unsigned long *val) 835 { 836 FILE *f; 837 char buf[BUFSIZ]; 838 char *end = NULL; 839 840 f = fopen(filename, "r"); 841 if (f == NULL) { 842 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s", 843 __func__, filename); 844 return -1; 845 } 846 847 if (fgets(buf, sizeof(buf), f) == NULL) { 848 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s", 849 __func__, filename); 850 fclose(f); 851 return -1; 852 } 853 *val = strtoul(buf, &end, 0); 854 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) { 855 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s", 856 __func__, filename); 857 fclose(f); 858 return -1; 859 } 860 fclose(f); 861 return 0; 862 } 863 864 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen, 865 unsigned int *uio_num) 866 { 867 struct dirent *e; 868 DIR *dir; 869 char dirname[PATH_MAX]; 870 871 /* depending on kernel version, uio can be located in uio/uioX 872 * or uio:uioX */ 873 snprintf(dirname, sizeof(dirname), 874 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio", 875 loc->domain, loc->bus, loc->devid, loc->function); 876 dir = opendir(dirname); 877 if (dir == NULL) { 878 /* retry with the parent directory */ 879 snprintf(dirname, sizeof(dirname), 880 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT, 881 loc->domain, loc->bus, loc->devid, loc->function); 882 dir = opendir(dirname); 883 884 if (dir == NULL) { 885 PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname); 886 return -1; 887 } 888 } 889 890 /* take the first file starting with "uio" */ 891 while ((e = readdir(dir)) != NULL) { 892 /* format could be uio%d ...*/ 893 int shortprefix_len = sizeof("uio") - 1; 894 /* ... or uio:uio%d */ 895 int longprefix_len = sizeof("uio:uio") - 1; 896 char *endptr; 897 898 if (strncmp(e->d_name, "uio", 3) != 0) 899 continue; 900 901 /* first try uio%d */ 902 errno = 0; 903 *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10); 904 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) { 905 snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num); 906 break; 907 } 908 909 /* then try uio:uio%d */ 910 errno = 0; 911 *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10); 912 if (errno == 0 && endptr != (e->d_name + longprefix_len)) { 913 snprintf(buf, buflen, "%s/uio:uio%u", dirname, 914 *uio_num); 915 break; 916 } 917 } 918 closedir(dir); 919 920 /* No uio resource found */ 921 if (e == NULL) { 922 PMD_INIT_LOG(ERR, "Could not find uio resource"); 923 return -1; 924 } 925 926 return 0; 927 } 928 929 static int 930 virtio_has_msix(const struct rte_pci_addr *loc) 931 { 932 DIR *d; 933 char dirname[PATH_MAX]; 934 935 snprintf(dirname, sizeof(dirname), 936 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs", 937 loc->domain, loc->bus, loc->devid, loc->function); 938 939 d = opendir(dirname); 940 if (d) 941 closedir(d); 942 943 return (d != NULL); 944 } 945 946 /* Extract I/O port numbers from sysfs */ 947 static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev) 948 { 949 char dirname[PATH_MAX]; 950 char filename[PATH_MAX]; 951 unsigned long start, size; 952 unsigned int uio_num; 953 954 if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0) 955 return -1; 956 957 /* get portio size */ 958 snprintf(filename, sizeof(filename), 959 "%s/portio/port0/size", dirname); 960 if (parse_sysfs_value(filename, &size) < 0) { 961 PMD_INIT_LOG(ERR, "%s(): cannot parse size", 962 __func__); 963 return -1; 964 } 965 966 /* get portio start */ 967 snprintf(filename, sizeof(filename), 968 "%s/portio/port0/start", dirname); 969 if (parse_sysfs_value(filename, &start) < 0) { 970 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start", 971 __func__); 972 return -1; 973 } 974 pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start; 975 pci_dev->mem_resource[0].len = (uint64_t)size; 976 PMD_INIT_LOG(DEBUG, 977 "PCI Port IO found start=0x%lx with size=0x%lx", 978 start, size); 979 980 /* save fd */ 981 memset(dirname, 0, sizeof(dirname)); 982 snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num); 983 pci_dev->intr_handle.fd = open(dirname, O_RDWR); 984 if (pci_dev->intr_handle.fd < 0) { 985 PMD_INIT_LOG(ERR, "Cannot open %s: %s\n", 986 dirname, strerror(errno)); 987 return -1; 988 } 989 990 pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO; 991 pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC; 992 993 return 0; 994 } 995 996 /* Extract port I/O numbers from proc/ioports */ 997 static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev) 998 { 999 uint16_t start, end; 1000 int size; 1001 FILE *fp; 1002 char *line = NULL; 1003 char pci_id[16]; 1004 int found = 0; 1005 size_t linesz; 1006 1007 snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT, 1008 pci_dev->addr.domain, 1009 pci_dev->addr.bus, 1010 pci_dev->addr.devid, 1011 pci_dev->addr.function); 1012 1013 fp = fopen("/proc/ioports", "r"); 1014 if (fp == NULL) { 1015 PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__); 1016 return -1; 1017 } 1018 1019 while (getdelim(&line, &linesz, '\n', fp) > 0) { 1020 char *ptr = line; 1021 char *left; 1022 int n; 1023 1024 n = strcspn(ptr, ":"); 1025 ptr[n] = 0; 1026 left = &ptr[n+1]; 1027 1028 while (*left && isspace(*left)) 1029 left++; 1030 1031 if (!strncmp(left, pci_id, strlen(pci_id))) { 1032 found = 1; 1033 1034 while (*ptr && isspace(*ptr)) 1035 ptr++; 1036 1037 sscanf(ptr, "%04hx-%04hx", &start, &end); 1038 size = end - start + 1; 1039 1040 break; 1041 } 1042 } 1043 1044 free(line); 1045 fclose(fp); 1046 1047 if (!found) 1048 return -1; 1049 1050 pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start; 1051 pci_dev->mem_resource[0].len = (uint64_t)size; 1052 PMD_INIT_LOG(DEBUG, 1053 "PCI Port IO found start=0x%x with size=0x%x", 1054 start, size); 1055 1056 /* can't support lsc interrupt without uio */ 1057 pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC; 1058 1059 return 0; 1060 } 1061 1062 /* Extract I/O port numbers from sysfs */ 1063 static int virtio_resource_init(struct rte_pci_device *pci_dev) 1064 { 1065 if (virtio_resource_init_by_uio(pci_dev) == 0) 1066 return 0; 1067 else 1068 return virtio_resource_init_by_ioports(pci_dev); 1069 } 1070 1071 #else 1072 static int 1073 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused) 1074 { 1075 /* nic_uio does not enable interrupts, return 0 (false). */ 1076 return 0; 1077 } 1078 1079 static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused) 1080 { 1081 /* no setup required */ 1082 return 0; 1083 } 1084 #endif 1085 1086 /* 1087 * Process Virtio Config changed interrupt and call the callback 1088 * if link state changed. 1089 */ 1090 static void 1091 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle, 1092 void *param) 1093 { 1094 struct rte_eth_dev *dev = param; 1095 struct virtio_hw *hw = dev->data->dev_private; 1096 uint8_t isr; 1097 1098 /* Read interrupt status which clears interrupt */ 1099 isr = vtpci_isr(hw); 1100 PMD_DRV_LOG(INFO, "interrupt status = %#x", isr); 1101 1102 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) 1103 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1104 1105 if (isr & VIRTIO_PCI_ISR_CONFIG) { 1106 if (virtio_dev_link_update(dev, 0) == 0) 1107 _rte_eth_dev_callback_process(dev, 1108 RTE_ETH_EVENT_INTR_LSC); 1109 } 1110 1111 } 1112 1113 static void 1114 rx_func_get(struct rte_eth_dev *eth_dev) 1115 { 1116 struct virtio_hw *hw = eth_dev->data->dev_private; 1117 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) 1118 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts; 1119 else 1120 eth_dev->rx_pkt_burst = &virtio_recv_pkts; 1121 } 1122 1123 /* 1124 * This function is based on probe() function in virtio_pci.c 1125 * It returns 0 on success. 1126 */ 1127 static int 1128 eth_virtio_dev_init(struct rte_eth_dev *eth_dev) 1129 { 1130 struct virtio_hw *hw = eth_dev->data->dev_private; 1131 struct virtio_net_config *config; 1132 struct virtio_net_config local_config; 1133 uint32_t offset_conf = sizeof(config->mac); 1134 struct rte_pci_device *pci_dev; 1135 1136 RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr)); 1137 1138 eth_dev->dev_ops = &virtio_eth_dev_ops; 1139 eth_dev->tx_pkt_burst = &virtio_xmit_pkts; 1140 1141 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1142 rx_func_get(eth_dev); 1143 return 0; 1144 } 1145 1146 /* Allocate memory for storing MAC addresses */ 1147 eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0); 1148 if (eth_dev->data->mac_addrs == NULL) { 1149 PMD_INIT_LOG(ERR, 1150 "Failed to allocate %d bytes needed to store MAC addresses", 1151 ETHER_ADDR_LEN); 1152 return -ENOMEM; 1153 } 1154 1155 pci_dev = eth_dev->pci_dev; 1156 if (virtio_resource_init(pci_dev) < 0) 1157 return -1; 1158 1159 hw->use_msix = virtio_has_msix(&pci_dev->addr); 1160 hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr; 1161 1162 /* Reset the device although not necessary at startup */ 1163 vtpci_reset(hw); 1164 1165 /* Tell the host we've noticed this device. */ 1166 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK); 1167 1168 /* Tell the host we've known how to drive the device. */ 1169 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER); 1170 virtio_negotiate_features(hw); 1171 1172 rx_func_get(eth_dev); 1173 1174 /* Setting up rx_header size for the device */ 1175 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) 1176 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); 1177 else 1178 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr); 1179 1180 /* Copy the permanent MAC address to: virtio_hw */ 1181 virtio_get_hwaddr(hw); 1182 ether_addr_copy((struct ether_addr *) hw->mac_addr, 1183 ð_dev->data->mac_addrs[0]); 1184 PMD_INIT_LOG(DEBUG, 1185 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1186 hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2], 1187 hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]); 1188 1189 if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) { 1190 config = &local_config; 1191 1192 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1193 offset_conf += sizeof(config->status); 1194 } else { 1195 PMD_INIT_LOG(DEBUG, 1196 "VIRTIO_NET_F_STATUS is not supported"); 1197 config->status = 0; 1198 } 1199 1200 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) { 1201 offset_conf += sizeof(config->max_virtqueue_pairs); 1202 } else { 1203 PMD_INIT_LOG(DEBUG, 1204 "VIRTIO_NET_F_MQ is not supported"); 1205 config->max_virtqueue_pairs = 1; 1206 } 1207 1208 vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf); 1209 1210 hw->max_rx_queues = 1211 (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ? 1212 VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs; 1213 hw->max_tx_queues = 1214 (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ? 1215 VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs; 1216 1217 virtio_dev_cq_queue_setup(eth_dev, 1218 config->max_virtqueue_pairs * 2, 1219 SOCKET_ID_ANY); 1220 1221 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d", 1222 config->max_virtqueue_pairs); 1223 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status); 1224 PMD_INIT_LOG(DEBUG, 1225 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X", 1226 config->mac[0], config->mac[1], 1227 config->mac[2], config->mac[3], 1228 config->mac[4], config->mac[5]); 1229 } else { 1230 hw->max_rx_queues = 1; 1231 hw->max_tx_queues = 1; 1232 } 1233 1234 eth_dev->data->nb_rx_queues = hw->max_rx_queues; 1235 eth_dev->data->nb_tx_queues = hw->max_tx_queues; 1236 1237 PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d hw->max_tx_queues=%d", 1238 hw->max_rx_queues, hw->max_tx_queues); 1239 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x", 1240 eth_dev->data->port_id, pci_dev->id.vendor_id, 1241 pci_dev->id.device_id); 1242 1243 /* Setup interrupt callback */ 1244 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC) 1245 rte_intr_callback_register(&pci_dev->intr_handle, 1246 virtio_interrupt_handler, eth_dev); 1247 1248 virtio_dev_cq_start(eth_dev); 1249 1250 return 0; 1251 } 1252 1253 static struct eth_driver rte_virtio_pmd = { 1254 .pci_drv = { 1255 .name = "rte_virtio_pmd", 1256 .id_table = pci_id_virtio_map, 1257 }, 1258 .eth_dev_init = eth_virtio_dev_init, 1259 .dev_private_size = sizeof(struct virtio_hw), 1260 }; 1261 1262 /* 1263 * Driver initialization routine. 1264 * Invoked once at EAL init time. 1265 * Register itself as the [Poll Mode] Driver of PCI virtio devices. 1266 * Returns 0 on success. 1267 */ 1268 static int 1269 rte_virtio_pmd_init(const char *name __rte_unused, 1270 const char *param __rte_unused) 1271 { 1272 if (rte_eal_iopl_init() != 0) { 1273 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD"); 1274 return -1; 1275 } 1276 1277 rte_eth_driver_register(&rte_virtio_pmd); 1278 return 0; 1279 } 1280 1281 /* 1282 * Only 1 queue is supported, no queue release related operation 1283 */ 1284 static void 1285 virtio_dev_rx_queue_release(__rte_unused void *rxq) 1286 { 1287 } 1288 1289 static void 1290 virtio_dev_tx_queue_release(__rte_unused void *txq) 1291 { 1292 } 1293 1294 /* 1295 * Configure virtio device 1296 * It returns 0 on success. 1297 */ 1298 static int 1299 virtio_dev_configure(struct rte_eth_dev *dev) 1300 { 1301 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; 1302 struct virtio_hw *hw = dev->data->dev_private; 1303 struct rte_pci_device *pci_dev = dev->pci_dev; 1304 1305 PMD_INIT_LOG(DEBUG, "configure"); 1306 1307 if (rxmode->hw_ip_checksum) { 1308 PMD_DRV_LOG(ERR, "HW IP checksum not supported"); 1309 return (-EINVAL); 1310 } 1311 1312 hw->vlan_strip = rxmode->hw_vlan_strip; 1313 1314 if (rxmode->hw_vlan_filter 1315 && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) { 1316 PMD_DRV_LOG(NOTICE, 1317 "vlan filtering not available on this host"); 1318 return -ENOTSUP; 1319 } 1320 1321 if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC) 1322 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) { 1323 PMD_DRV_LOG(ERR, "failed to set config vector"); 1324 return -EBUSY; 1325 } 1326 1327 return 0; 1328 } 1329 1330 1331 static int 1332 virtio_dev_start(struct rte_eth_dev *dev) 1333 { 1334 uint16_t nb_queues, i; 1335 struct virtio_hw *hw = dev->data->dev_private; 1336 struct rte_pci_device *pci_dev = dev->pci_dev; 1337 1338 /* check if lsc interrupt feature is enabled */ 1339 if ((dev->data->dev_conf.intr_conf.lsc) && 1340 (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) { 1341 if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1342 PMD_DRV_LOG(ERR, "link status not supported by host"); 1343 return -ENOTSUP; 1344 } 1345 1346 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) { 1347 PMD_DRV_LOG(ERR, "interrupt enable failed"); 1348 return -EIO; 1349 } 1350 } 1351 1352 /* Initialize Link state */ 1353 virtio_dev_link_update(dev, 0); 1354 1355 /* On restart after stop do not touch queues */ 1356 if (hw->started) 1357 return 0; 1358 1359 /* Do final configuration before rx/tx engine starts */ 1360 virtio_dev_rxtx_start(dev); 1361 vtpci_reinit_complete(hw); 1362 1363 hw->started = 1; 1364 1365 /*Notify the backend 1366 *Otherwise the tap backend might already stop its queue due to fullness. 1367 *vhost backend will have no chance to be waked up 1368 */ 1369 nb_queues = dev->data->nb_rx_queues; 1370 if (nb_queues > 1) { 1371 if (virtio_set_multiple_queues(dev, nb_queues) != 0) 1372 return -EINVAL; 1373 } 1374 1375 PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues); 1376 1377 for (i = 0; i < nb_queues; i++) 1378 virtqueue_notify(dev->data->rx_queues[i]); 1379 1380 PMD_INIT_LOG(DEBUG, "Notified backend at initialization"); 1381 1382 for (i = 0; i < dev->data->nb_rx_queues; i++) 1383 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]); 1384 1385 for (i = 0; i < dev->data->nb_tx_queues; i++) 1386 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]); 1387 1388 return 0; 1389 } 1390 1391 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev) 1392 { 1393 struct rte_mbuf *buf; 1394 int i, mbuf_num = 0; 1395 1396 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1397 PMD_INIT_LOG(DEBUG, 1398 "Before freeing rxq[%d] used and unused buf", i); 1399 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]); 1400 1401 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused( 1402 dev->data->rx_queues[i])) != NULL) { 1403 rte_pktmbuf_free(buf); 1404 mbuf_num++; 1405 } 1406 1407 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num); 1408 PMD_INIT_LOG(DEBUG, 1409 "After freeing rxq[%d] used and unused buf", i); 1410 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]); 1411 } 1412 1413 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1414 PMD_INIT_LOG(DEBUG, 1415 "Before freeing txq[%d] used and unused bufs", 1416 i); 1417 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]); 1418 1419 mbuf_num = 0; 1420 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused( 1421 dev->data->tx_queues[i])) != NULL) { 1422 rte_pktmbuf_free(buf); 1423 1424 mbuf_num++; 1425 } 1426 1427 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num); 1428 PMD_INIT_LOG(DEBUG, 1429 "After freeing txq[%d] used and unused buf", i); 1430 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]); 1431 } 1432 } 1433 1434 /* 1435 * Stop device: disable interrupt and mark link down 1436 */ 1437 static void 1438 virtio_dev_stop(struct rte_eth_dev *dev) 1439 { 1440 struct rte_eth_link link; 1441 1442 PMD_INIT_LOG(DEBUG, "stop"); 1443 1444 if (dev->data->dev_conf.intr_conf.lsc) 1445 rte_intr_disable(&dev->pci_dev->intr_handle); 1446 1447 memset(&link, 0, sizeof(link)); 1448 virtio_dev_atomic_write_link_status(dev, &link); 1449 } 1450 1451 static int 1452 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete) 1453 { 1454 struct rte_eth_link link, old; 1455 uint16_t status; 1456 struct virtio_hw *hw = dev->data->dev_private; 1457 memset(&link, 0, sizeof(link)); 1458 virtio_dev_atomic_read_link_status(dev, &link); 1459 old = link; 1460 link.link_duplex = FULL_DUPLEX; 1461 link.link_speed = SPEED_10G; 1462 1463 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) { 1464 PMD_INIT_LOG(DEBUG, "Get link status from hw"); 1465 vtpci_read_dev_config(hw, 1466 offsetof(struct virtio_net_config, status), 1467 &status, sizeof(status)); 1468 if ((status & VIRTIO_NET_S_LINK_UP) == 0) { 1469 link.link_status = 0; 1470 PMD_INIT_LOG(DEBUG, "Port %d is down", 1471 dev->data->port_id); 1472 } else { 1473 link.link_status = 1; 1474 PMD_INIT_LOG(DEBUG, "Port %d is up", 1475 dev->data->port_id); 1476 } 1477 } else { 1478 link.link_status = 1; /* Link up */ 1479 } 1480 virtio_dev_atomic_write_link_status(dev, &link); 1481 1482 return (old.link_status == link.link_status) ? -1 : 0; 1483 } 1484 1485 static void 1486 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) 1487 { 1488 struct virtio_hw *hw = dev->data->dev_private; 1489 1490 dev_info->driver_name = dev->driver->pci_drv.name; 1491 dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues; 1492 dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues; 1493 dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE; 1494 dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN; 1495 dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS; 1496 dev_info->default_txconf = (struct rte_eth_txconf) { 1497 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS 1498 }; 1499 } 1500 1501 /* 1502 * It enables testpmd to collect per queue stats. 1503 */ 1504 static int 1505 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev, 1506 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx, 1507 __rte_unused uint8_t is_rx) 1508 { 1509 return 0; 1510 } 1511 1512 static struct rte_driver rte_virtio_driver = { 1513 .type = PMD_PDEV, 1514 .init = rte_virtio_pmd_init, 1515 }; 1516 1517 PMD_REGISTER_DRIVER(rte_virtio_driver); 1518