1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2016-2018 Microsoft Corporation 3 * Copyright(c) 2013-2016 Brocade Communications Systems, Inc. 4 * All rights reserved. 5 */ 6 7 #include <stdint.h> 8 #include <string.h> 9 #include <stdio.h> 10 #include <errno.h> 11 #include <unistd.h> 12 #include <strings.h> 13 #include <malloc.h> 14 15 #include <rte_ethdev.h> 16 #include <rte_memcpy.h> 17 #include <rte_string_fns.h> 18 #include <rte_memzone.h> 19 #include <rte_malloc.h> 20 #include <rte_atomic.h> 21 #include <rte_bitmap.h> 22 #include <rte_branch_prediction.h> 23 #include <rte_ether.h> 24 #include <rte_common.h> 25 #include <rte_errno.h> 26 #include <rte_memory.h> 27 #include <rte_eal.h> 28 #include <rte_dev.h> 29 #include <rte_net.h> 30 #include <rte_bus_vmbus.h> 31 #include <rte_spinlock.h> 32 33 #include "hn_logs.h" 34 #include "hn_var.h" 35 #include "hn_rndis.h" 36 #include "hn_nvs.h" 37 #include "ndis.h" 38 39 #define HN_NVS_SEND_MSG_SIZE \ 40 (sizeof(struct vmbus_chanpkt_hdr) + sizeof(struct hn_nvs_rndis)) 41 42 #define HN_TXD_CACHE_SIZE 32 /* per cpu tx_descriptor pool cache */ 43 #define HN_TXCOPY_THRESHOLD 512 44 45 #define HN_RXCOPY_THRESHOLD 256 46 #define HN_RXQ_EVENT_DEFAULT 2048 47 48 struct hn_rxinfo { 49 uint32_t vlan_info; 50 uint32_t csum_info; 51 uint32_t hash_info; 52 uint32_t hash_value; 53 }; 54 55 #define HN_RXINFO_VLAN 0x0001 56 #define HN_RXINFO_CSUM 0x0002 57 #define HN_RXINFO_HASHINF 0x0004 58 #define HN_RXINFO_HASHVAL 0x0008 59 #define HN_RXINFO_ALL \ 60 (HN_RXINFO_VLAN | \ 61 HN_RXINFO_CSUM | \ 62 HN_RXINFO_HASHINF | \ 63 HN_RXINFO_HASHVAL) 64 65 #define HN_NDIS_VLAN_INFO_INVALID 0xffffffff 66 #define HN_NDIS_RXCSUM_INFO_INVALID 0 67 #define HN_NDIS_HASH_INFO_INVALID 0 68 69 /* 70 * Per-transmit book keeping. 71 * A slot in transmit ring (chim_index) is reserved for each transmit. 72 * 73 * There are two types of transmit: 74 * - buffered transmit where chimney buffer is used and RNDIS header 75 * is in the buffer. mbuf == NULL for this case. 76 * 77 * - direct transmit where RNDIS header is in the in rndis_pkt 78 * mbuf is freed after transmit. 79 * 80 * Descriptors come from per-port pool which is used 81 * to limit number of outstanding requests per device. 82 */ 83 struct hn_txdesc { 84 struct rte_mbuf *m; 85 86 uint16_t queue_id; 87 uint32_t chim_index; 88 uint32_t chim_size; 89 uint32_t data_size; 90 uint32_t packets; 91 92 struct rndis_packet_msg *rndis_pkt; 93 }; 94 95 #define HN_RNDIS_PKT_LEN \ 96 (sizeof(struct rndis_packet_msg) + \ 97 RNDIS_PKTINFO_SIZE(NDIS_HASH_VALUE_SIZE) + \ 98 RNDIS_PKTINFO_SIZE(NDIS_VLAN_INFO_SIZE) + \ 99 RNDIS_PKTINFO_SIZE(NDIS_LSO2_INFO_SIZE) + \ 100 RNDIS_PKTINFO_SIZE(NDIS_TXCSUM_INFO_SIZE)) 101 102 #define HN_RNDIS_PKT_ALIGNED RTE_ALIGN(HN_RNDIS_PKT_LEN, RTE_CACHE_LINE_SIZE) 103 104 /* Minimum space required for a packet */ 105 #define HN_PKTSIZE_MIN(align) \ 106 RTE_ALIGN(RTE_ETHER_MIN_LEN + HN_RNDIS_PKT_LEN, align) 107 108 #define DEFAULT_TX_FREE_THRESH 32 109 110 static void 111 hn_update_packet_stats(struct hn_stats *stats, const struct rte_mbuf *m) 112 { 113 uint32_t s = m->pkt_len; 114 const struct rte_ether_addr *ea; 115 116 if (s == 64) { 117 stats->size_bins[1]++; 118 } else if (s > 64 && s < 1024) { 119 uint32_t bin; 120 121 /* count zeros, and offset into correct bin */ 122 bin = (sizeof(s) * 8) - __builtin_clz(s) - 5; 123 stats->size_bins[bin]++; 124 } else { 125 if (s < 64) 126 stats->size_bins[0]++; 127 else if (s < 1519) 128 stats->size_bins[6]++; 129 else 130 stats->size_bins[7]++; 131 } 132 133 ea = rte_pktmbuf_mtod(m, const struct rte_ether_addr *); 134 if (rte_is_multicast_ether_addr(ea)) { 135 if (rte_is_broadcast_ether_addr(ea)) 136 stats->broadcast++; 137 else 138 stats->multicast++; 139 } 140 } 141 142 static inline unsigned int hn_rndis_pktlen(const struct rndis_packet_msg *pkt) 143 { 144 return pkt->pktinfooffset + pkt->pktinfolen; 145 } 146 147 static inline uint32_t 148 hn_rndis_pktmsg_offset(uint32_t ofs) 149 { 150 return ofs - offsetof(struct rndis_packet_msg, dataoffset); 151 } 152 153 static void hn_txd_init(struct rte_mempool *mp __rte_unused, 154 void *opaque, void *obj, unsigned int idx) 155 { 156 struct hn_tx_queue *txq = opaque; 157 struct hn_txdesc *txd = obj; 158 159 memset(txd, 0, sizeof(*txd)); 160 161 txd->queue_id = txq->queue_id; 162 txd->chim_index = NVS_CHIM_IDX_INVALID; 163 txd->rndis_pkt = (struct rndis_packet_msg *)(char *)txq->tx_rndis 164 + idx * HN_RNDIS_PKT_ALIGNED; 165 } 166 167 int 168 hn_chim_init(struct rte_eth_dev *dev) 169 { 170 struct hn_data *hv = dev->data->dev_private; 171 uint32_t i, chim_bmp_size; 172 173 rte_spinlock_init(&hv->chim_lock); 174 chim_bmp_size = rte_bitmap_get_memory_footprint(hv->chim_cnt); 175 hv->chim_bmem = rte_zmalloc("hn_chim_bitmap", chim_bmp_size, 176 RTE_CACHE_LINE_SIZE); 177 if (hv->chim_bmem == NULL) { 178 PMD_INIT_LOG(ERR, "failed to allocate bitmap size %u", 179 chim_bmp_size); 180 return -1; 181 } 182 183 hv->chim_bmap = rte_bitmap_init(hv->chim_cnt, 184 hv->chim_bmem, chim_bmp_size); 185 if (hv->chim_bmap == NULL) { 186 PMD_INIT_LOG(ERR, "failed to init chim bitmap"); 187 return -1; 188 } 189 190 for (i = 0; i < hv->chim_cnt; i++) 191 rte_bitmap_set(hv->chim_bmap, i); 192 193 return 0; 194 } 195 196 void 197 hn_chim_uninit(struct rte_eth_dev *dev) 198 { 199 struct hn_data *hv = dev->data->dev_private; 200 201 rte_bitmap_free(hv->chim_bmap); 202 rte_free(hv->chim_bmem); 203 hv->chim_bmem = NULL; 204 } 205 206 static uint32_t hn_chim_alloc(struct hn_data *hv) 207 { 208 uint32_t index = NVS_CHIM_IDX_INVALID; 209 uint64_t slab; 210 211 rte_spinlock_lock(&hv->chim_lock); 212 if (rte_bitmap_scan(hv->chim_bmap, &index, &slab)) 213 rte_bitmap_clear(hv->chim_bmap, index); 214 rte_spinlock_unlock(&hv->chim_lock); 215 216 return index; 217 } 218 219 static void hn_chim_free(struct hn_data *hv, uint32_t chim_idx) 220 { 221 if (chim_idx >= hv->chim_cnt) { 222 PMD_DRV_LOG(ERR, "Invalid chimney index %u", chim_idx); 223 } else { 224 rte_spinlock_lock(&hv->chim_lock); 225 rte_bitmap_set(hv->chim_bmap, chim_idx); 226 rte_spinlock_unlock(&hv->chim_lock); 227 } 228 } 229 230 static void hn_reset_txagg(struct hn_tx_queue *txq) 231 { 232 txq->agg_szleft = txq->agg_szmax; 233 txq->agg_pktleft = txq->agg_pktmax; 234 txq->agg_txd = NULL; 235 txq->agg_prevpkt = NULL; 236 } 237 238 int 239 hn_dev_tx_queue_setup(struct rte_eth_dev *dev, 240 uint16_t queue_idx, uint16_t nb_desc, 241 unsigned int socket_id, 242 const struct rte_eth_txconf *tx_conf) 243 244 { 245 struct hn_data *hv = dev->data->dev_private; 246 struct hn_tx_queue *txq; 247 char name[RTE_MEMPOOL_NAMESIZE]; 248 uint32_t tx_free_thresh; 249 int err = -ENOMEM; 250 251 PMD_INIT_FUNC_TRACE(); 252 253 txq = rte_zmalloc_socket("HN_TXQ", sizeof(*txq), RTE_CACHE_LINE_SIZE, 254 socket_id); 255 if (!txq) 256 return -ENOMEM; 257 258 txq->hv = hv; 259 txq->chan = hv->channels[queue_idx]; 260 txq->port_id = dev->data->port_id; 261 txq->queue_id = queue_idx; 262 263 tx_free_thresh = tx_conf->tx_free_thresh; 264 if (tx_free_thresh == 0) 265 tx_free_thresh = RTE_MIN(nb_desc / 4, 266 DEFAULT_TX_FREE_THRESH); 267 268 if (tx_free_thresh + 3 >= nb_desc) { 269 PMD_INIT_LOG(ERR, 270 "tx_free_thresh must be less than the number of TX entries minus 3(%u)." 271 " (tx_free_thresh=%u port=%u queue=%u)\n", 272 nb_desc - 3, 273 tx_free_thresh, dev->data->port_id, queue_idx); 274 return -EINVAL; 275 } 276 277 txq->free_thresh = tx_free_thresh; 278 279 snprintf(name, sizeof(name), 280 "hn_txd_%u_%u", dev->data->port_id, queue_idx); 281 282 PMD_INIT_LOG(DEBUG, "TX descriptor pool %s n=%u size=%zu", 283 name, nb_desc, sizeof(struct hn_txdesc)); 284 285 txq->tx_rndis = rte_calloc("hn_txq_rndis", nb_desc, 286 HN_RNDIS_PKT_ALIGNED, RTE_CACHE_LINE_SIZE); 287 if (txq->tx_rndis == NULL) 288 goto error; 289 290 txq->txdesc_pool = rte_mempool_create(name, nb_desc, 291 sizeof(struct hn_txdesc), 292 0, 0, NULL, NULL, 293 hn_txd_init, txq, 294 dev->device->numa_node, 0); 295 if (txq->txdesc_pool == NULL) { 296 PMD_DRV_LOG(ERR, 297 "mempool %s create failed: %d", name, rte_errno); 298 goto error; 299 } 300 301 txq->agg_szmax = RTE_MIN(hv->chim_szmax, hv->rndis_agg_size); 302 txq->agg_pktmax = hv->rndis_agg_pkts; 303 txq->agg_align = hv->rndis_agg_align; 304 305 hn_reset_txagg(txq); 306 307 err = hn_vf_tx_queue_setup(dev, queue_idx, nb_desc, 308 socket_id, tx_conf); 309 if (err == 0) { 310 dev->data->tx_queues[queue_idx] = txq; 311 return 0; 312 } 313 314 error: 315 if (txq->txdesc_pool) 316 rte_mempool_free(txq->txdesc_pool); 317 rte_free(txq->tx_rndis); 318 rte_free(txq); 319 return err; 320 } 321 322 323 static struct hn_txdesc *hn_txd_get(struct hn_tx_queue *txq) 324 { 325 struct hn_txdesc *txd; 326 327 if (rte_mempool_get(txq->txdesc_pool, (void **)&txd)) { 328 ++txq->stats.ring_full; 329 PMD_TX_LOG(DEBUG, "tx pool exhausted!"); 330 return NULL; 331 } 332 333 txd->m = NULL; 334 txd->packets = 0; 335 txd->data_size = 0; 336 txd->chim_size = 0; 337 338 return txd; 339 } 340 341 static void hn_txd_put(struct hn_tx_queue *txq, struct hn_txdesc *txd) 342 { 343 rte_mempool_put(txq->txdesc_pool, txd); 344 } 345 346 void 347 hn_dev_tx_queue_release(void *arg) 348 { 349 struct hn_tx_queue *txq = arg; 350 351 PMD_INIT_FUNC_TRACE(); 352 353 if (!txq) 354 return; 355 356 if (txq->txdesc_pool) 357 rte_mempool_free(txq->txdesc_pool); 358 359 rte_free(txq->tx_rndis); 360 rte_free(txq); 361 } 362 363 static void 364 hn_nvs_send_completed(struct rte_eth_dev *dev, uint16_t queue_id, 365 unsigned long xactid, const struct hn_nvs_rndis_ack *ack) 366 { 367 struct hn_data *hv = dev->data->dev_private; 368 struct hn_txdesc *txd = (struct hn_txdesc *)xactid; 369 struct hn_tx_queue *txq; 370 371 /* Control packets are sent with xacid == 0 */ 372 if (!txd) 373 return; 374 375 txq = dev->data->tx_queues[queue_id]; 376 if (likely(ack->status == NVS_STATUS_OK)) { 377 PMD_TX_LOG(DEBUG, "port %u:%u complete tx %u packets %u bytes %u", 378 txq->port_id, txq->queue_id, txd->chim_index, 379 txd->packets, txd->data_size); 380 txq->stats.bytes += txd->data_size; 381 txq->stats.packets += txd->packets; 382 } else { 383 PMD_TX_LOG(NOTICE, "port %u:%u complete tx %u failed status %u", 384 txq->port_id, txq->queue_id, txd->chim_index, ack->status); 385 ++txq->stats.errors; 386 } 387 388 if (txd->chim_index != NVS_CHIM_IDX_INVALID) 389 hn_chim_free(hv, txd->chim_index); 390 391 rte_pktmbuf_free(txd->m); 392 hn_txd_put(txq, txd); 393 } 394 395 /* Handle transmit completion events */ 396 static void 397 hn_nvs_handle_comp(struct rte_eth_dev *dev, uint16_t queue_id, 398 const struct vmbus_chanpkt_hdr *pkt, 399 const void *data) 400 { 401 const struct hn_nvs_hdr *hdr = data; 402 403 switch (hdr->type) { 404 case NVS_TYPE_RNDIS_ACK: 405 hn_nvs_send_completed(dev, queue_id, pkt->xactid, data); 406 break; 407 408 default: 409 PMD_TX_LOG(NOTICE, 410 "unexpected send completion type %u", 411 hdr->type); 412 } 413 } 414 415 /* Parse per-packet info (meta data) */ 416 static int 417 hn_rndis_rxinfo(const void *info_data, unsigned int info_dlen, 418 struct hn_rxinfo *info) 419 { 420 const struct rndis_pktinfo *pi = info_data; 421 uint32_t mask = 0; 422 423 while (info_dlen != 0) { 424 const void *data; 425 uint32_t dlen; 426 427 if (unlikely(info_dlen < sizeof(*pi))) 428 return -EINVAL; 429 430 if (unlikely(info_dlen < pi->size)) 431 return -EINVAL; 432 info_dlen -= pi->size; 433 434 if (unlikely(pi->size & RNDIS_PKTINFO_SIZE_ALIGNMASK)) 435 return -EINVAL; 436 if (unlikely(pi->size < pi->offset)) 437 return -EINVAL; 438 439 dlen = pi->size - pi->offset; 440 data = pi->data; 441 442 switch (pi->type) { 443 case NDIS_PKTINFO_TYPE_VLAN: 444 if (unlikely(dlen < NDIS_VLAN_INFO_SIZE)) 445 return -EINVAL; 446 info->vlan_info = *((const uint32_t *)data); 447 mask |= HN_RXINFO_VLAN; 448 break; 449 450 case NDIS_PKTINFO_TYPE_CSUM: 451 if (unlikely(dlen < NDIS_RXCSUM_INFO_SIZE)) 452 return -EINVAL; 453 info->csum_info = *((const uint32_t *)data); 454 mask |= HN_RXINFO_CSUM; 455 break; 456 457 case NDIS_PKTINFO_TYPE_HASHVAL: 458 if (unlikely(dlen < NDIS_HASH_VALUE_SIZE)) 459 return -EINVAL; 460 info->hash_value = *((const uint32_t *)data); 461 mask |= HN_RXINFO_HASHVAL; 462 break; 463 464 case NDIS_PKTINFO_TYPE_HASHINF: 465 if (unlikely(dlen < NDIS_HASH_INFO_SIZE)) 466 return -EINVAL; 467 info->hash_info = *((const uint32_t *)data); 468 mask |= HN_RXINFO_HASHINF; 469 break; 470 471 default: 472 goto next; 473 } 474 475 if (mask == HN_RXINFO_ALL) 476 break; /* All found; done */ 477 next: 478 pi = (const struct rndis_pktinfo *) 479 ((const uint8_t *)pi + pi->size); 480 } 481 482 /* 483 * Final fixup. 484 * - If there is no hash value, invalidate the hash info. 485 */ 486 if (!(mask & HN_RXINFO_HASHVAL)) 487 info->hash_info = HN_NDIS_HASH_INFO_INVALID; 488 return 0; 489 } 490 491 /* 492 * Ack the consumed RXBUF associated w/ this channel packet, 493 * so that this RXBUF can be recycled by the hypervisor. 494 */ 495 static void hn_rx_buf_release(struct hn_rx_bufinfo *rxb) 496 { 497 struct rte_mbuf_ext_shared_info *shinfo = &rxb->shinfo; 498 struct hn_data *hv = rxb->hv; 499 500 if (rte_mbuf_ext_refcnt_update(shinfo, -1) == 0) { 501 hn_nvs_ack_rxbuf(rxb->chan, rxb->xactid); 502 --hv->rxbuf_outstanding; 503 } 504 } 505 506 static void hn_rx_buf_free_cb(void *buf __rte_unused, void *opaque) 507 { 508 hn_rx_buf_release(opaque); 509 } 510 511 static struct hn_rx_bufinfo *hn_rx_buf_init(const struct hn_rx_queue *rxq, 512 const struct vmbus_chanpkt_rxbuf *pkt) 513 { 514 struct hn_rx_bufinfo *rxb; 515 516 rxb = rxq->hv->rxbuf_info + pkt->hdr.xactid; 517 rxb->chan = rxq->chan; 518 rxb->xactid = pkt->hdr.xactid; 519 rxb->hv = rxq->hv; 520 521 rxb->shinfo.free_cb = hn_rx_buf_free_cb; 522 rxb->shinfo.fcb_opaque = rxb; 523 rte_mbuf_ext_refcnt_set(&rxb->shinfo, 1); 524 return rxb; 525 } 526 527 static void hn_rxpkt(struct hn_rx_queue *rxq, struct hn_rx_bufinfo *rxb, 528 uint8_t *data, unsigned int headroom, unsigned int dlen, 529 const struct hn_rxinfo *info) 530 { 531 struct hn_data *hv = rxq->hv; 532 struct rte_mbuf *m; 533 534 m = rte_pktmbuf_alloc(rxq->mb_pool); 535 if (unlikely(!m)) { 536 struct rte_eth_dev *dev = 537 &rte_eth_devices[rxq->port_id]; 538 539 dev->data->rx_mbuf_alloc_failed++; 540 return; 541 } 542 543 /* 544 * For large packets, avoid copy if possible but need to keep 545 * some space available in receive area for later packets. 546 */ 547 if (dlen >= HN_RXCOPY_THRESHOLD && 548 hv->rxbuf_outstanding < hv->rxbuf_section_cnt / 2) { 549 struct rte_mbuf_ext_shared_info *shinfo; 550 const void *rxbuf; 551 rte_iova_t iova; 552 553 /* 554 * Build an external mbuf that points to recveive area. 555 * Use refcount to handle multiple packets in same 556 * receive buffer section. 557 */ 558 rxbuf = hv->rxbuf_res->addr; 559 iova = rte_mem_virt2iova(rxbuf) + RTE_PTR_DIFF(data, rxbuf); 560 shinfo = &rxb->shinfo; 561 562 if (rte_mbuf_ext_refcnt_update(shinfo, 1) == 1) 563 ++hv->rxbuf_outstanding; 564 565 rte_pktmbuf_attach_extbuf(m, data, iova, 566 dlen + headroom, shinfo); 567 m->data_off = headroom; 568 } else { 569 /* Mbuf's in pool must be large enough to hold small packets */ 570 if (unlikely(rte_pktmbuf_tailroom(m) < dlen)) { 571 rte_pktmbuf_free_seg(m); 572 ++rxq->stats.errors; 573 return; 574 } 575 rte_memcpy(rte_pktmbuf_mtod(m, void *), 576 data + headroom, dlen); 577 } 578 579 m->port = rxq->port_id; 580 m->pkt_len = dlen; 581 m->data_len = dlen; 582 m->packet_type = rte_net_get_ptype(m, NULL, 583 RTE_PTYPE_L2_MASK | 584 RTE_PTYPE_L3_MASK | 585 RTE_PTYPE_L4_MASK); 586 587 if (info->vlan_info != HN_NDIS_VLAN_INFO_INVALID) { 588 m->vlan_tci = info->vlan_info; 589 m->ol_flags |= PKT_RX_VLAN_STRIPPED | PKT_RX_VLAN; 590 591 /* NDIS always strips tag, put it back if necessary */ 592 if (!hv->vlan_strip && rte_vlan_insert(&m)) { 593 PMD_DRV_LOG(DEBUG, "vlan insert failed"); 594 ++rxq->stats.errors; 595 rte_pktmbuf_free(m); 596 return; 597 } 598 } 599 600 if (info->csum_info != HN_NDIS_RXCSUM_INFO_INVALID) { 601 if (info->csum_info & NDIS_RXCSUM_INFO_IPCS_OK) 602 m->ol_flags |= PKT_RX_IP_CKSUM_GOOD; 603 604 if (info->csum_info & (NDIS_RXCSUM_INFO_UDPCS_OK 605 | NDIS_RXCSUM_INFO_TCPCS_OK)) 606 m->ol_flags |= PKT_RX_L4_CKSUM_GOOD; 607 else if (info->csum_info & (NDIS_RXCSUM_INFO_TCPCS_FAILED 608 | NDIS_RXCSUM_INFO_UDPCS_FAILED)) 609 m->ol_flags |= PKT_RX_L4_CKSUM_BAD; 610 } 611 612 if (info->hash_info != HN_NDIS_HASH_INFO_INVALID) { 613 m->ol_flags |= PKT_RX_RSS_HASH; 614 m->hash.rss = info->hash_value; 615 } 616 617 PMD_RX_LOG(DEBUG, 618 "port %u:%u RX id %"PRIu64" size %u type %#x ol_flags %#"PRIx64, 619 rxq->port_id, rxq->queue_id, rxb->xactid, 620 m->pkt_len, m->packet_type, m->ol_flags); 621 622 ++rxq->stats.packets; 623 rxq->stats.bytes += m->pkt_len; 624 hn_update_packet_stats(&rxq->stats, m); 625 626 if (unlikely(rte_ring_sp_enqueue(rxq->rx_ring, m) != 0)) { 627 ++rxq->stats.ring_full; 628 rte_pktmbuf_free(m); 629 } 630 } 631 632 static void hn_rndis_rx_data(struct hn_rx_queue *rxq, 633 struct hn_rx_bufinfo *rxb, 634 void *data, uint32_t dlen) 635 { 636 unsigned int data_off, data_len, pktinfo_off, pktinfo_len; 637 const struct rndis_packet_msg *pkt = data; 638 struct hn_rxinfo info = { 639 .vlan_info = HN_NDIS_VLAN_INFO_INVALID, 640 .csum_info = HN_NDIS_RXCSUM_INFO_INVALID, 641 .hash_info = HN_NDIS_HASH_INFO_INVALID, 642 }; 643 int err; 644 645 hn_rndis_dump(pkt); 646 647 if (unlikely(dlen < sizeof(*pkt))) 648 goto error; 649 650 if (unlikely(dlen < pkt->len)) 651 goto error; /* truncated RNDIS from host */ 652 653 if (unlikely(pkt->len < pkt->datalen 654 + pkt->oobdatalen + pkt->pktinfolen)) 655 goto error; 656 657 if (unlikely(pkt->datalen == 0)) 658 goto error; 659 660 /* Check offsets. */ 661 if (unlikely(pkt->dataoffset < RNDIS_PACKET_MSG_OFFSET_MIN)) 662 goto error; 663 664 if (likely(pkt->pktinfooffset > 0) && 665 unlikely(pkt->pktinfooffset < RNDIS_PACKET_MSG_OFFSET_MIN || 666 (pkt->pktinfooffset & RNDIS_PACKET_MSG_OFFSET_ALIGNMASK))) 667 goto error; 668 669 data_off = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->dataoffset); 670 data_len = pkt->datalen; 671 pktinfo_off = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->pktinfooffset); 672 pktinfo_len = pkt->pktinfolen; 673 674 if (likely(pktinfo_len > 0)) { 675 err = hn_rndis_rxinfo((const uint8_t *)pkt + pktinfo_off, 676 pktinfo_len, &info); 677 if (err) 678 goto error; 679 } 680 681 if (unlikely(data_off + data_len > pkt->len)) 682 goto error; 683 684 if (unlikely(data_len < RTE_ETHER_HDR_LEN)) 685 goto error; 686 687 hn_rxpkt(rxq, rxb, data, data_off, data_len, &info); 688 return; 689 error: 690 ++rxq->stats.errors; 691 } 692 693 static void 694 hn_rndis_receive(struct rte_eth_dev *dev, struct hn_rx_queue *rxq, 695 struct hn_rx_bufinfo *rxb, void *buf, uint32_t len) 696 { 697 const struct rndis_msghdr *hdr = buf; 698 699 switch (hdr->type) { 700 case RNDIS_PACKET_MSG: 701 if (dev->data->dev_started) 702 hn_rndis_rx_data(rxq, rxb, buf, len); 703 break; 704 705 case RNDIS_INDICATE_STATUS_MSG: 706 hn_rndis_link_status(dev, buf); 707 break; 708 709 case RNDIS_INITIALIZE_CMPLT: 710 case RNDIS_QUERY_CMPLT: 711 case RNDIS_SET_CMPLT: 712 hn_rndis_receive_response(rxq->hv, buf, len); 713 break; 714 715 default: 716 PMD_DRV_LOG(NOTICE, 717 "unexpected RNDIS message (type %#x len %u)", 718 hdr->type, len); 719 break; 720 } 721 } 722 723 static void 724 hn_nvs_handle_rxbuf(struct rte_eth_dev *dev, 725 struct hn_data *hv, 726 struct hn_rx_queue *rxq, 727 const struct vmbus_chanpkt_hdr *hdr, 728 const void *buf) 729 { 730 const struct vmbus_chanpkt_rxbuf *pkt; 731 const struct hn_nvs_hdr *nvs_hdr = buf; 732 uint32_t rxbuf_sz = hv->rxbuf_res->len; 733 char *rxbuf = hv->rxbuf_res->addr; 734 unsigned int i, hlen, count; 735 struct hn_rx_bufinfo *rxb; 736 737 /* At minimum we need type header */ 738 if (unlikely(vmbus_chanpkt_datalen(hdr) < sizeof(*nvs_hdr))) { 739 PMD_RX_LOG(ERR, "invalid receive nvs RNDIS"); 740 return; 741 } 742 743 /* Make sure that this is a RNDIS message. */ 744 if (unlikely(nvs_hdr->type != NVS_TYPE_RNDIS)) { 745 PMD_RX_LOG(ERR, "nvs type %u, not RNDIS", 746 nvs_hdr->type); 747 return; 748 } 749 750 hlen = vmbus_chanpkt_getlen(hdr->hlen); 751 if (unlikely(hlen < sizeof(*pkt))) { 752 PMD_RX_LOG(ERR, "invalid rxbuf chanpkt"); 753 return; 754 } 755 756 pkt = container_of(hdr, const struct vmbus_chanpkt_rxbuf, hdr); 757 if (unlikely(pkt->rxbuf_id != NVS_RXBUF_SIG)) { 758 PMD_RX_LOG(ERR, "invalid rxbuf_id 0x%08x", 759 pkt->rxbuf_id); 760 return; 761 } 762 763 count = pkt->rxbuf_cnt; 764 if (unlikely(hlen < offsetof(struct vmbus_chanpkt_rxbuf, 765 rxbuf[count]))) { 766 PMD_RX_LOG(ERR, "invalid rxbuf_cnt %u", count); 767 return; 768 } 769 770 if (pkt->hdr.xactid > hv->rxbuf_section_cnt) { 771 PMD_RX_LOG(ERR, "invalid rxbuf section id %" PRIx64, 772 pkt->hdr.xactid); 773 return; 774 } 775 776 /* Setup receive buffer info to allow for callback */ 777 rxb = hn_rx_buf_init(rxq, pkt); 778 779 /* Each range represents 1 RNDIS pkt that contains 1 Ethernet frame */ 780 for (i = 0; i < count; ++i) { 781 unsigned int ofs, len; 782 783 ofs = pkt->rxbuf[i].ofs; 784 len = pkt->rxbuf[i].len; 785 786 if (unlikely(ofs + len > rxbuf_sz)) { 787 PMD_RX_LOG(ERR, 788 "%uth RNDIS msg overflow ofs %u, len %u", 789 i, ofs, len); 790 continue; 791 } 792 793 if (unlikely(len == 0)) { 794 PMD_RX_LOG(ERR, "%uth RNDIS msg len %u", i, len); 795 continue; 796 } 797 798 hn_rndis_receive(dev, rxq, rxb, 799 rxbuf + ofs, len); 800 } 801 802 /* Send ACK now if external mbuf not used */ 803 hn_rx_buf_release(rxb); 804 } 805 806 /* 807 * Called when NVS inband events are received. 808 * Send up a two part message with port_id and the NVS message 809 * to the pipe to the netvsc-vf-event control thread. 810 */ 811 static void hn_nvs_handle_notify(struct rte_eth_dev *dev, 812 const struct vmbus_chanpkt_hdr *pkt, 813 const void *data) 814 { 815 const struct hn_nvs_hdr *hdr = data; 816 817 switch (hdr->type) { 818 case NVS_TYPE_TXTBL_NOTE: 819 /* Transmit indirection table has locking problems 820 * in DPDK and therefore not implemented 821 */ 822 PMD_DRV_LOG(DEBUG, "host notify of transmit indirection table"); 823 break; 824 825 case NVS_TYPE_VFASSOC_NOTE: 826 hn_nvs_handle_vfassoc(dev, pkt, data); 827 break; 828 829 default: 830 PMD_DRV_LOG(INFO, 831 "got notify, nvs type %u", hdr->type); 832 } 833 } 834 835 struct hn_rx_queue *hn_rx_queue_alloc(struct hn_data *hv, 836 uint16_t queue_id, 837 unsigned int socket_id) 838 { 839 struct hn_rx_queue *rxq; 840 841 rxq = rte_zmalloc_socket("HN_RXQ", sizeof(*rxq), 842 RTE_CACHE_LINE_SIZE, socket_id); 843 if (!rxq) 844 return NULL; 845 846 rxq->hv = hv; 847 rxq->chan = hv->channels[queue_id]; 848 rte_spinlock_init(&rxq->ring_lock); 849 rxq->port_id = hv->port_id; 850 rxq->queue_id = queue_id; 851 rxq->event_sz = HN_RXQ_EVENT_DEFAULT; 852 rxq->event_buf = rte_malloc_socket("HN_EVENTS", HN_RXQ_EVENT_DEFAULT, 853 RTE_CACHE_LINE_SIZE, socket_id); 854 if (!rxq->event_buf) { 855 rte_free(rxq); 856 return NULL; 857 } 858 859 return rxq; 860 } 861 862 int 863 hn_dev_rx_queue_setup(struct rte_eth_dev *dev, 864 uint16_t queue_idx, uint16_t nb_desc, 865 unsigned int socket_id, 866 const struct rte_eth_rxconf *rx_conf, 867 struct rte_mempool *mp) 868 { 869 struct hn_data *hv = dev->data->dev_private; 870 char ring_name[RTE_RING_NAMESIZE]; 871 struct hn_rx_queue *rxq; 872 unsigned int count; 873 int error = -ENOMEM; 874 875 PMD_INIT_FUNC_TRACE(); 876 877 if (queue_idx == 0) { 878 rxq = hv->primary; 879 } else { 880 rxq = hn_rx_queue_alloc(hv, queue_idx, socket_id); 881 if (!rxq) 882 return -ENOMEM; 883 } 884 885 rxq->mb_pool = mp; 886 count = rte_mempool_avail_count(mp) / dev->data->nb_rx_queues; 887 if (nb_desc == 0 || nb_desc > count) 888 nb_desc = count; 889 890 /* 891 * Staging ring from receive event logic to rx_pkts. 892 * rx_pkts assumes caller is handling multi-thread issue. 893 * event logic has locking. 894 */ 895 snprintf(ring_name, sizeof(ring_name), 896 "hn_rx_%u_%u", dev->data->port_id, queue_idx); 897 rxq->rx_ring = rte_ring_create(ring_name, 898 rte_align32pow2(nb_desc), 899 socket_id, 0); 900 if (!rxq->rx_ring) 901 goto fail; 902 903 error = hn_vf_rx_queue_setup(dev, queue_idx, nb_desc, 904 socket_id, rx_conf, mp); 905 if (error) 906 goto fail; 907 908 dev->data->rx_queues[queue_idx] = rxq; 909 return 0; 910 911 fail: 912 rte_ring_free(rxq->rx_ring); 913 rte_free(rxq->event_buf); 914 rte_free(rxq); 915 return error; 916 } 917 918 static void 919 hn_rx_queue_free(struct hn_rx_queue *rxq, bool keep_primary) 920 { 921 922 if (!rxq) 923 return; 924 925 rte_ring_free(rxq->rx_ring); 926 rxq->rx_ring = NULL; 927 rxq->mb_pool = NULL; 928 929 hn_vf_rx_queue_release(rxq->hv, rxq->queue_id); 930 931 /* Keep primary queue to allow for control operations */ 932 if (keep_primary && rxq == rxq->hv->primary) 933 return; 934 935 rte_free(rxq->event_buf); 936 rte_free(rxq); 937 } 938 939 void 940 hn_dev_rx_queue_release(void *arg) 941 { 942 struct hn_rx_queue *rxq = arg; 943 944 PMD_INIT_FUNC_TRACE(); 945 946 hn_rx_queue_free(rxq, true); 947 } 948 949 int 950 hn_dev_tx_done_cleanup(void *arg, uint32_t free_cnt) 951 { 952 struct hn_tx_queue *txq = arg; 953 954 return hn_process_events(txq->hv, txq->queue_id, free_cnt); 955 } 956 957 /* 958 * Process pending events on the channel. 959 * Called from both Rx queue poll and Tx cleanup 960 */ 961 uint32_t hn_process_events(struct hn_data *hv, uint16_t queue_id, 962 uint32_t tx_limit) 963 { 964 struct rte_eth_dev *dev = &rte_eth_devices[hv->port_id]; 965 struct hn_rx_queue *rxq; 966 uint32_t bytes_read = 0; 967 uint32_t tx_done = 0; 968 int ret = 0; 969 970 rxq = queue_id == 0 ? hv->primary : dev->data->rx_queues[queue_id]; 971 972 /* 973 * Since channel is shared between Rx and TX queue need to have a lock 974 * since DPDK does not force same CPU to be used for Rx/Tx. 975 */ 976 if (unlikely(!rte_spinlock_trylock(&rxq->ring_lock))) 977 return 0; 978 979 for (;;) { 980 const struct vmbus_chanpkt_hdr *pkt; 981 uint32_t len = rxq->event_sz; 982 const void *data; 983 984 retry: 985 ret = rte_vmbus_chan_recv_raw(rxq->chan, rxq->event_buf, &len); 986 if (ret == -EAGAIN) 987 break; /* ring is empty */ 988 989 if (unlikely(ret == -ENOBUFS)) { 990 /* event buffer not large enough to read ring */ 991 992 PMD_DRV_LOG(DEBUG, 993 "event buffer expansion (need %u)", len); 994 rxq->event_sz = len + len / 4; 995 rxq->event_buf = rte_realloc(rxq->event_buf, rxq->event_sz, 996 RTE_CACHE_LINE_SIZE); 997 if (rxq->event_buf) 998 goto retry; 999 /* out of memory, no more events now */ 1000 rxq->event_sz = 0; 1001 break; 1002 } 1003 1004 if (unlikely(ret <= 0)) { 1005 /* This indicates a failure to communicate (or worse) */ 1006 rte_exit(EXIT_FAILURE, 1007 "vmbus ring buffer error: %d", ret); 1008 } 1009 1010 bytes_read += ret; 1011 pkt = (const struct vmbus_chanpkt_hdr *)rxq->event_buf; 1012 data = (char *)rxq->event_buf + vmbus_chanpkt_getlen(pkt->hlen); 1013 1014 switch (pkt->type) { 1015 case VMBUS_CHANPKT_TYPE_COMP: 1016 ++tx_done; 1017 hn_nvs_handle_comp(dev, queue_id, pkt, data); 1018 break; 1019 1020 case VMBUS_CHANPKT_TYPE_RXBUF: 1021 hn_nvs_handle_rxbuf(dev, hv, rxq, pkt, data); 1022 break; 1023 1024 case VMBUS_CHANPKT_TYPE_INBAND: 1025 hn_nvs_handle_notify(dev, pkt, data); 1026 break; 1027 1028 default: 1029 PMD_DRV_LOG(ERR, "unknown chan pkt %u", pkt->type); 1030 break; 1031 } 1032 1033 if (tx_limit && tx_done >= tx_limit) 1034 break; 1035 } 1036 1037 if (bytes_read > 0) 1038 rte_vmbus_chan_signal_read(rxq->chan, bytes_read); 1039 1040 rte_spinlock_unlock(&rxq->ring_lock); 1041 1042 return tx_done; 1043 } 1044 1045 static void hn_append_to_chim(struct hn_tx_queue *txq, 1046 struct rndis_packet_msg *pkt, 1047 const struct rte_mbuf *m) 1048 { 1049 struct hn_txdesc *txd = txq->agg_txd; 1050 uint8_t *buf = (uint8_t *)pkt; 1051 unsigned int data_offs; 1052 1053 hn_rndis_dump(pkt); 1054 1055 data_offs = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->dataoffset); 1056 txd->chim_size += pkt->len; 1057 txd->data_size += m->pkt_len; 1058 ++txd->packets; 1059 hn_update_packet_stats(&txq->stats, m); 1060 1061 for (; m; m = m->next) { 1062 uint16_t len = rte_pktmbuf_data_len(m); 1063 1064 rte_memcpy(buf + data_offs, 1065 rte_pktmbuf_mtod(m, const char *), len); 1066 data_offs += len; 1067 } 1068 } 1069 1070 /* 1071 * Send pending aggregated data in chimney buffer (if any). 1072 * Returns error if send was unsuccessful because channel ring buffer 1073 * was full. 1074 */ 1075 static int hn_flush_txagg(struct hn_tx_queue *txq, bool *need_sig) 1076 1077 { 1078 struct hn_txdesc *txd = txq->agg_txd; 1079 struct hn_nvs_rndis rndis; 1080 int ret; 1081 1082 if (!txd) 1083 return 0; 1084 1085 rndis = (struct hn_nvs_rndis) { 1086 .type = NVS_TYPE_RNDIS, 1087 .rndis_mtype = NVS_RNDIS_MTYPE_DATA, 1088 .chim_idx = txd->chim_index, 1089 .chim_sz = txd->chim_size, 1090 }; 1091 1092 PMD_TX_LOG(DEBUG, "port %u:%u tx %u size %u", 1093 txq->port_id, txq->queue_id, txd->chim_index, txd->chim_size); 1094 1095 ret = hn_nvs_send(txq->chan, VMBUS_CHANPKT_FLAG_RC, 1096 &rndis, sizeof(rndis), (uintptr_t)txd, need_sig); 1097 1098 if (likely(ret == 0)) 1099 hn_reset_txagg(txq); 1100 else 1101 PMD_TX_LOG(NOTICE, "port %u:%u send failed: %d", 1102 txq->port_id, txq->queue_id, ret); 1103 1104 return ret; 1105 } 1106 1107 /* 1108 * Try and find a place in a send chimney buffer to put 1109 * the small packet. If space is available, this routine 1110 * returns a pointer of where to place the data. 1111 * If no space, caller should try direct transmit. 1112 */ 1113 static void * 1114 hn_try_txagg(struct hn_data *hv, struct hn_tx_queue *txq, 1115 struct hn_txdesc *txd, uint32_t pktsize) 1116 { 1117 struct hn_txdesc *agg_txd = txq->agg_txd; 1118 struct rndis_packet_msg *pkt; 1119 void *chim; 1120 1121 if (agg_txd) { 1122 unsigned int padding, olen; 1123 1124 /* 1125 * Update the previous RNDIS packet's total length, 1126 * it can be increased due to the mandatory alignment 1127 * padding for this RNDIS packet. And update the 1128 * aggregating txdesc's chimney sending buffer size 1129 * accordingly. 1130 * 1131 * Zero-out the padding, as required by the RNDIS spec. 1132 */ 1133 pkt = txq->agg_prevpkt; 1134 olen = pkt->len; 1135 padding = RTE_ALIGN(olen, txq->agg_align) - olen; 1136 if (padding > 0) { 1137 agg_txd->chim_size += padding; 1138 pkt->len += padding; 1139 memset((uint8_t *)pkt + olen, 0, padding); 1140 } 1141 1142 chim = (uint8_t *)pkt + pkt->len; 1143 txq->agg_prevpkt = chim; 1144 txq->agg_pktleft--; 1145 txq->agg_szleft -= pktsize; 1146 if (txq->agg_szleft < HN_PKTSIZE_MIN(txq->agg_align)) { 1147 /* 1148 * Probably can't aggregate more packets, 1149 * flush this aggregating txdesc proactively. 1150 */ 1151 txq->agg_pktleft = 0; 1152 } 1153 1154 hn_txd_put(txq, txd); 1155 return chim; 1156 } 1157 1158 txd->chim_index = hn_chim_alloc(hv); 1159 if (txd->chim_index == NVS_CHIM_IDX_INVALID) 1160 return NULL; 1161 1162 chim = (uint8_t *)hv->chim_res->addr 1163 + txd->chim_index * hv->chim_szmax; 1164 1165 txq->agg_txd = txd; 1166 txq->agg_pktleft = txq->agg_pktmax - 1; 1167 txq->agg_szleft = txq->agg_szmax - pktsize; 1168 txq->agg_prevpkt = chim; 1169 1170 return chim; 1171 } 1172 1173 static inline void * 1174 hn_rndis_pktinfo_append(struct rndis_packet_msg *pkt, 1175 uint32_t pi_dlen, uint32_t pi_type) 1176 { 1177 const uint32_t pi_size = RNDIS_PKTINFO_SIZE(pi_dlen); 1178 struct rndis_pktinfo *pi; 1179 1180 /* 1181 * Per-packet-info does not move; it only grows. 1182 * 1183 * NOTE: 1184 * pktinfooffset in this phase counts from the beginning 1185 * of rndis_packet_msg. 1186 */ 1187 pi = (struct rndis_pktinfo *)((uint8_t *)pkt + hn_rndis_pktlen(pkt)); 1188 1189 pkt->pktinfolen += pi_size; 1190 1191 pi->size = pi_size; 1192 pi->type = pi_type; 1193 pi->offset = RNDIS_PKTINFO_OFFSET; 1194 1195 return pi->data; 1196 } 1197 1198 /* Put RNDIS header and packet info on packet */ 1199 static void hn_encap(struct rndis_packet_msg *pkt, 1200 uint16_t queue_id, 1201 const struct rte_mbuf *m) 1202 { 1203 unsigned int hlen = m->l2_len + m->l3_len; 1204 uint32_t *pi_data; 1205 uint32_t pkt_hlen; 1206 1207 pkt->type = RNDIS_PACKET_MSG; 1208 pkt->len = m->pkt_len; 1209 pkt->dataoffset = 0; 1210 pkt->datalen = m->pkt_len; 1211 pkt->oobdataoffset = 0; 1212 pkt->oobdatalen = 0; 1213 pkt->oobdataelements = 0; 1214 pkt->pktinfooffset = sizeof(*pkt); 1215 pkt->pktinfolen = 0; 1216 pkt->vchandle = 0; 1217 pkt->reserved = 0; 1218 1219 /* 1220 * Set the hash value for this packet, to the queue_id to cause 1221 * TX done event for this packet on the right channel. 1222 */ 1223 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_HASH_VALUE_SIZE, 1224 NDIS_PKTINFO_TYPE_HASHVAL); 1225 *pi_data = queue_id; 1226 1227 if (m->ol_flags & PKT_TX_VLAN_PKT) { 1228 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_VLAN_INFO_SIZE, 1229 NDIS_PKTINFO_TYPE_VLAN); 1230 *pi_data = m->vlan_tci; 1231 } 1232 1233 if (m->ol_flags & PKT_TX_TCP_SEG) { 1234 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_LSO2_INFO_SIZE, 1235 NDIS_PKTINFO_TYPE_LSO); 1236 1237 if (m->ol_flags & PKT_TX_IPV6) { 1238 *pi_data = NDIS_LSO2_INFO_MAKEIPV6(hlen, 1239 m->tso_segsz); 1240 } else { 1241 *pi_data = NDIS_LSO2_INFO_MAKEIPV4(hlen, 1242 m->tso_segsz); 1243 } 1244 } else if (m->ol_flags & 1245 (PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM)) { 1246 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_TXCSUM_INFO_SIZE, 1247 NDIS_PKTINFO_TYPE_CSUM); 1248 *pi_data = 0; 1249 1250 if (m->ol_flags & PKT_TX_IPV6) 1251 *pi_data |= NDIS_TXCSUM_INFO_IPV6; 1252 if (m->ol_flags & PKT_TX_IPV4) { 1253 *pi_data |= NDIS_TXCSUM_INFO_IPV4; 1254 1255 if (m->ol_flags & PKT_TX_IP_CKSUM) 1256 *pi_data |= NDIS_TXCSUM_INFO_IPCS; 1257 } 1258 1259 if (m->ol_flags & PKT_TX_TCP_CKSUM) 1260 *pi_data |= NDIS_TXCSUM_INFO_MKTCPCS(hlen); 1261 else if (m->ol_flags & PKT_TX_UDP_CKSUM) 1262 *pi_data |= NDIS_TXCSUM_INFO_MKUDPCS(hlen); 1263 } 1264 1265 pkt_hlen = pkt->pktinfooffset + pkt->pktinfolen; 1266 /* Fixup RNDIS packet message total length */ 1267 pkt->len += pkt_hlen; 1268 1269 /* Convert RNDIS packet message offsets */ 1270 pkt->dataoffset = hn_rndis_pktmsg_offset(pkt_hlen); 1271 pkt->pktinfooffset = hn_rndis_pktmsg_offset(pkt->pktinfooffset); 1272 } 1273 1274 /* How many scatter gather list elements ar needed */ 1275 static unsigned int hn_get_slots(const struct rte_mbuf *m) 1276 { 1277 unsigned int slots = 1; /* for RNDIS header */ 1278 1279 while (m) { 1280 unsigned int size = rte_pktmbuf_data_len(m); 1281 unsigned int offs = rte_mbuf_data_iova(m) & PAGE_MASK; 1282 1283 slots += (offs + size + PAGE_SIZE - 1) / PAGE_SIZE; 1284 m = m->next; 1285 } 1286 1287 return slots; 1288 } 1289 1290 /* Build scatter gather list from chained mbuf */ 1291 static unsigned int hn_fill_sg(struct vmbus_gpa *sg, 1292 const struct rte_mbuf *m) 1293 { 1294 unsigned int segs = 0; 1295 1296 while (m) { 1297 rte_iova_t addr = rte_mbuf_data_iova(m); 1298 unsigned int page = addr / PAGE_SIZE; 1299 unsigned int offset = addr & PAGE_MASK; 1300 unsigned int len = rte_pktmbuf_data_len(m); 1301 1302 while (len > 0) { 1303 unsigned int bytes = RTE_MIN(len, PAGE_SIZE - offset); 1304 1305 sg[segs].page = page; 1306 sg[segs].ofs = offset; 1307 sg[segs].len = bytes; 1308 segs++; 1309 1310 ++page; 1311 offset = 0; 1312 len -= bytes; 1313 } 1314 m = m->next; 1315 } 1316 1317 return segs; 1318 } 1319 1320 /* Transmit directly from mbuf */ 1321 static int hn_xmit_sg(struct hn_tx_queue *txq, 1322 const struct hn_txdesc *txd, const struct rte_mbuf *m, 1323 bool *need_sig) 1324 { 1325 struct vmbus_gpa sg[hn_get_slots(m)]; 1326 struct hn_nvs_rndis nvs_rndis = { 1327 .type = NVS_TYPE_RNDIS, 1328 .rndis_mtype = NVS_RNDIS_MTYPE_DATA, 1329 .chim_sz = txd->chim_size, 1330 }; 1331 rte_iova_t addr; 1332 unsigned int segs; 1333 1334 /* attach aggregation data if present */ 1335 if (txd->chim_size > 0) 1336 nvs_rndis.chim_idx = txd->chim_index; 1337 else 1338 nvs_rndis.chim_idx = NVS_CHIM_IDX_INVALID; 1339 1340 hn_rndis_dump(txd->rndis_pkt); 1341 1342 /* pass IOVA of rndis header in first segment */ 1343 addr = rte_malloc_virt2iova(txd->rndis_pkt); 1344 if (unlikely(addr == RTE_BAD_IOVA)) { 1345 PMD_DRV_LOG(ERR, "RNDIS transmit can not get iova"); 1346 return -EINVAL; 1347 } 1348 1349 sg[0].page = addr / PAGE_SIZE; 1350 sg[0].ofs = addr & PAGE_MASK; 1351 sg[0].len = RNDIS_PACKET_MSG_OFFSET_ABS(hn_rndis_pktlen(txd->rndis_pkt)); 1352 segs = 1; 1353 1354 hn_update_packet_stats(&txq->stats, m); 1355 1356 segs += hn_fill_sg(sg + 1, m); 1357 1358 PMD_TX_LOG(DEBUG, "port %u:%u tx %u segs %u size %u", 1359 txq->port_id, txq->queue_id, txd->chim_index, 1360 segs, nvs_rndis.chim_sz); 1361 1362 return hn_nvs_send_sglist(txq->chan, sg, segs, 1363 &nvs_rndis, sizeof(nvs_rndis), 1364 (uintptr_t)txd, need_sig); 1365 } 1366 1367 uint16_t 1368 hn_xmit_pkts(void *ptxq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) 1369 { 1370 struct hn_tx_queue *txq = ptxq; 1371 uint16_t queue_id = txq->queue_id; 1372 struct hn_data *hv = txq->hv; 1373 struct rte_eth_dev *vf_dev; 1374 bool need_sig = false; 1375 uint16_t nb_tx, avail; 1376 int ret; 1377 1378 if (unlikely(hv->closed)) 1379 return 0; 1380 1381 /* Transmit over VF if present and up */ 1382 vf_dev = hn_get_vf_dev(hv); 1383 1384 if (vf_dev && vf_dev->data->dev_started) { 1385 void *sub_q = vf_dev->data->tx_queues[queue_id]; 1386 1387 return (*vf_dev->tx_pkt_burst)(sub_q, tx_pkts, nb_pkts); 1388 } 1389 1390 avail = rte_mempool_avail_count(txq->txdesc_pool); 1391 if (nb_pkts > avail || avail <= txq->free_thresh) 1392 hn_process_events(hv, txq->queue_id, 0); 1393 1394 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1395 struct rte_mbuf *m = tx_pkts[nb_tx]; 1396 uint32_t pkt_size = m->pkt_len + HN_RNDIS_PKT_LEN; 1397 struct rndis_packet_msg *pkt; 1398 struct hn_txdesc *txd; 1399 1400 txd = hn_txd_get(txq); 1401 if (txd == NULL) 1402 break; 1403 1404 /* For small packets aggregate them in chimney buffer */ 1405 if (m->pkt_len < HN_TXCOPY_THRESHOLD && pkt_size <= txq->agg_szmax) { 1406 /* If this packet will not fit, then flush */ 1407 if (txq->agg_pktleft == 0 || 1408 RTE_ALIGN(pkt_size, txq->agg_align) > txq->agg_szleft) { 1409 if (hn_flush_txagg(txq, &need_sig)) 1410 goto fail; 1411 } 1412 1413 1414 pkt = hn_try_txagg(hv, txq, txd, pkt_size); 1415 if (unlikely(!pkt)) 1416 break; 1417 1418 hn_encap(pkt, queue_id, m); 1419 hn_append_to_chim(txq, pkt, m); 1420 1421 rte_pktmbuf_free(m); 1422 1423 /* if buffer is full, flush */ 1424 if (txq->agg_pktleft == 0 && 1425 hn_flush_txagg(txq, &need_sig)) 1426 goto fail; 1427 } else { 1428 /* Send any outstanding packets in buffer */ 1429 if (txq->agg_txd && hn_flush_txagg(txq, &need_sig)) 1430 goto fail; 1431 1432 pkt = txd->rndis_pkt; 1433 txd->m = m; 1434 txd->data_size = m->pkt_len; 1435 ++txd->packets; 1436 1437 hn_encap(pkt, queue_id, m); 1438 1439 ret = hn_xmit_sg(txq, txd, m, &need_sig); 1440 if (unlikely(ret != 0)) { 1441 PMD_TX_LOG(NOTICE, "sg send failed: %d", ret); 1442 ++txq->stats.errors; 1443 hn_txd_put(txq, txd); 1444 goto fail; 1445 } 1446 } 1447 } 1448 1449 /* If partial buffer left, then try and send it. 1450 * if that fails, then reuse it on next send. 1451 */ 1452 hn_flush_txagg(txq, &need_sig); 1453 1454 fail: 1455 if (need_sig) 1456 rte_vmbus_chan_signal_tx(txq->chan); 1457 1458 return nb_tx; 1459 } 1460 1461 static uint16_t 1462 hn_recv_vf(uint16_t vf_port, const struct hn_rx_queue *rxq, 1463 struct rte_mbuf **rx_pkts, uint16_t nb_pkts) 1464 { 1465 uint16_t i, n; 1466 1467 if (unlikely(nb_pkts == 0)) 1468 return 0; 1469 1470 n = rte_eth_rx_burst(vf_port, rxq->queue_id, rx_pkts, nb_pkts); 1471 1472 /* relabel the received mbufs */ 1473 for (i = 0; i < n; i++) 1474 rx_pkts[i]->port = rxq->port_id; 1475 1476 return n; 1477 } 1478 1479 uint16_t 1480 hn_recv_pkts(void *prxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) 1481 { 1482 struct hn_rx_queue *rxq = prxq; 1483 struct hn_data *hv = rxq->hv; 1484 struct rte_eth_dev *vf_dev; 1485 uint16_t nb_rcv; 1486 1487 if (unlikely(hv->closed)) 1488 return 0; 1489 1490 /* Receive from VF if present and up */ 1491 vf_dev = hn_get_vf_dev(hv); 1492 1493 /* Check for new completions */ 1494 if (likely(rte_ring_count(rxq->rx_ring) < nb_pkts)) 1495 hn_process_events(hv, rxq->queue_id, 0); 1496 1497 /* Always check the vmbus path for multicast and new flows */ 1498 nb_rcv = rte_ring_sc_dequeue_burst(rxq->rx_ring, 1499 (void **)rx_pkts, nb_pkts, NULL); 1500 1501 /* If VF is available, check that as well */ 1502 if (vf_dev && vf_dev->data->dev_started) 1503 nb_rcv += hn_recv_vf(vf_dev->data->port_id, rxq, 1504 rx_pkts + nb_rcv, nb_pkts - nb_rcv); 1505 1506 return nb_rcv; 1507 } 1508 1509 void 1510 hn_dev_free_queues(struct rte_eth_dev *dev) 1511 { 1512 unsigned int i; 1513 1514 for (i = 0; i < dev->data->nb_rx_queues; i++) { 1515 struct hn_rx_queue *rxq = dev->data->rx_queues[i]; 1516 1517 hn_rx_queue_free(rxq, false); 1518 dev->data->rx_queues[i] = NULL; 1519 } 1520 dev->data->nb_rx_queues = 0; 1521 1522 for (i = 0; i < dev->data->nb_tx_queues; i++) { 1523 hn_dev_tx_queue_release(dev->data->tx_queues[i]); 1524 dev->data->tx_queues[i] = NULL; 1525 } 1526 dev->data->nb_tx_queues = 0; 1527 } 1528