1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* Copyright (c) 2021, Microsoft Corporation. */ 3 4 #include <uapi/linux/bpf.h> 5 6 #include <linux/inetdevice.h> 7 #include <linux/etherdevice.h> 8 #include <linux/ethtool.h> 9 #include <linux/filter.h> 10 #include <linux/mm.h> 11 12 #include <net/checksum.h> 13 #include <net/ip6_checksum.h> 14 15 #include <net/mana/mana.h> 16 #include <net/mana/mana_auxiliary.h> 17 18 static DEFINE_IDA(mana_adev_ida); 19 20 static int mana_adev_idx_alloc(void) 21 { 22 return ida_alloc(&mana_adev_ida, GFP_KERNEL); 23 } 24 25 static void mana_adev_idx_free(int idx) 26 { 27 ida_free(&mana_adev_ida, idx); 28 } 29 30 /* Microsoft Azure Network Adapter (MANA) functions */ 31 32 static int mana_open(struct net_device *ndev) 33 { 34 struct mana_port_context *apc = netdev_priv(ndev); 35 int err; 36 37 err = mana_alloc_queues(ndev); 38 if (err) 39 return err; 40 41 apc->port_is_up = true; 42 43 /* Ensure port state updated before txq state */ 44 smp_wmb(); 45 46 netif_carrier_on(ndev); 47 netif_tx_wake_all_queues(ndev); 48 49 return 0; 50 } 51 52 static int mana_close(struct net_device *ndev) 53 { 54 struct mana_port_context *apc = netdev_priv(ndev); 55 56 if (!apc->port_is_up) 57 return 0; 58 59 return mana_detach(ndev, true); 60 } 61 62 static bool mana_can_tx(struct gdma_queue *wq) 63 { 64 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE; 65 } 66 67 static unsigned int mana_checksum_info(struct sk_buff *skb) 68 { 69 if (skb->protocol == htons(ETH_P_IP)) { 70 struct iphdr *ip = ip_hdr(skb); 71 72 if (ip->protocol == IPPROTO_TCP) 73 return IPPROTO_TCP; 74 75 if (ip->protocol == IPPROTO_UDP) 76 return IPPROTO_UDP; 77 } else if (skb->protocol == htons(ETH_P_IPV6)) { 78 struct ipv6hdr *ip6 = ipv6_hdr(skb); 79 80 if (ip6->nexthdr == IPPROTO_TCP) 81 return IPPROTO_TCP; 82 83 if (ip6->nexthdr == IPPROTO_UDP) 84 return IPPROTO_UDP; 85 } 86 87 /* No csum offloading */ 88 return 0; 89 } 90 91 static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc, 92 struct mana_tx_package *tp) 93 { 94 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 95 struct gdma_dev *gd = apc->ac->gdma_dev; 96 struct gdma_context *gc; 97 struct device *dev; 98 skb_frag_t *frag; 99 dma_addr_t da; 100 int i; 101 102 gc = gd->gdma_context; 103 dev = gc->dev; 104 da = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 105 106 if (dma_mapping_error(dev, da)) 107 return -ENOMEM; 108 109 ash->dma_handle[0] = da; 110 ash->size[0] = skb_headlen(skb); 111 112 tp->wqe_req.sgl[0].address = ash->dma_handle[0]; 113 tp->wqe_req.sgl[0].mem_key = gd->gpa_mkey; 114 tp->wqe_req.sgl[0].size = ash->size[0]; 115 116 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 117 frag = &skb_shinfo(skb)->frags[i]; 118 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 119 DMA_TO_DEVICE); 120 121 if (dma_mapping_error(dev, da)) 122 goto frag_err; 123 124 ash->dma_handle[i + 1] = da; 125 ash->size[i + 1] = skb_frag_size(frag); 126 127 tp->wqe_req.sgl[i + 1].address = ash->dma_handle[i + 1]; 128 tp->wqe_req.sgl[i + 1].mem_key = gd->gpa_mkey; 129 tp->wqe_req.sgl[i + 1].size = ash->size[i + 1]; 130 } 131 132 return 0; 133 134 frag_err: 135 for (i = i - 1; i >= 0; i--) 136 dma_unmap_page(dev, ash->dma_handle[i + 1], ash->size[i + 1], 137 DMA_TO_DEVICE); 138 139 dma_unmap_single(dev, ash->dma_handle[0], ash->size[0], DMA_TO_DEVICE); 140 141 return -ENOMEM; 142 } 143 144 netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) 145 { 146 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT; 147 struct mana_port_context *apc = netdev_priv(ndev); 148 u16 txq_idx = skb_get_queue_mapping(skb); 149 struct gdma_dev *gd = apc->ac->gdma_dev; 150 bool ipv4 = false, ipv6 = false; 151 struct mana_tx_package pkg = {}; 152 struct netdev_queue *net_txq; 153 struct mana_stats_tx *tx_stats; 154 struct gdma_queue *gdma_sq; 155 unsigned int csum_type; 156 struct mana_txq *txq; 157 struct mana_cq *cq; 158 int err, len; 159 160 if (unlikely(!apc->port_is_up)) 161 goto tx_drop; 162 163 if (skb_cow_head(skb, MANA_HEADROOM)) 164 goto tx_drop_count; 165 166 txq = &apc->tx_qp[txq_idx].txq; 167 gdma_sq = txq->gdma_sq; 168 cq = &apc->tx_qp[txq_idx].tx_cq; 169 170 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id; 171 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame; 172 173 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) { 174 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset; 175 pkt_fmt = MANA_LONG_PKT_FMT; 176 } else { 177 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; 178 } 179 180 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt; 181 182 if (pkt_fmt == MANA_SHORT_PKT_FMT) 183 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob); 184 else 185 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob); 186 187 pkg.wqe_req.inline_oob_data = &pkg.tx_oob; 188 pkg.wqe_req.flags = 0; 189 pkg.wqe_req.client_data_unit = 0; 190 191 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; 192 WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES); 193 194 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { 195 pkg.wqe_req.sgl = pkg.sgl_array; 196 } else { 197 pkg.sgl_ptr = kmalloc_array(pkg.wqe_req.num_sge, 198 sizeof(struct gdma_sge), 199 GFP_ATOMIC); 200 if (!pkg.sgl_ptr) 201 goto tx_drop_count; 202 203 pkg.wqe_req.sgl = pkg.sgl_ptr; 204 } 205 206 if (skb->protocol == htons(ETH_P_IP)) 207 ipv4 = true; 208 else if (skb->protocol == htons(ETH_P_IPV6)) 209 ipv6 = true; 210 211 if (skb_is_gso(skb)) { 212 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 213 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 214 215 pkg.tx_oob.s_oob.comp_iphdr_csum = 1; 216 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 217 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 218 219 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size; 220 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0; 221 if (ipv4) { 222 ip_hdr(skb)->tot_len = 0; 223 ip_hdr(skb)->check = 0; 224 tcp_hdr(skb)->check = 225 ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 226 ip_hdr(skb)->daddr, 0, 227 IPPROTO_TCP, 0); 228 } else { 229 ipv6_hdr(skb)->payload_len = 0; 230 tcp_hdr(skb)->check = 231 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 232 &ipv6_hdr(skb)->daddr, 0, 233 IPPROTO_TCP, 0); 234 } 235 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 236 csum_type = mana_checksum_info(skb); 237 238 if (csum_type == IPPROTO_TCP) { 239 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 240 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 241 242 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 243 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 244 245 } else if (csum_type == IPPROTO_UDP) { 246 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 247 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 248 249 pkg.tx_oob.s_oob.comp_udp_csum = 1; 250 } else { 251 /* Can't do offload of this type of checksum */ 252 if (skb_checksum_help(skb)) 253 goto free_sgl_ptr; 254 } 255 } 256 257 if (mana_map_skb(skb, apc, &pkg)) 258 goto free_sgl_ptr; 259 260 skb_queue_tail(&txq->pending_skbs, skb); 261 262 len = skb->len; 263 net_txq = netdev_get_tx_queue(ndev, txq_idx); 264 265 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req, 266 (struct gdma_posted_wqe_info *)skb->cb); 267 if (!mana_can_tx(gdma_sq)) { 268 netif_tx_stop_queue(net_txq); 269 apc->eth_stats.stop_queue++; 270 } 271 272 if (err) { 273 (void)skb_dequeue_tail(&txq->pending_skbs); 274 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err); 275 err = NETDEV_TX_BUSY; 276 goto tx_busy; 277 } 278 279 err = NETDEV_TX_OK; 280 atomic_inc(&txq->pending_sends); 281 282 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq); 283 284 /* skb may be freed after mana_gd_post_work_request. Do not use it. */ 285 skb = NULL; 286 287 tx_stats = &txq->stats; 288 u64_stats_update_begin(&tx_stats->syncp); 289 tx_stats->packets++; 290 tx_stats->bytes += len; 291 u64_stats_update_end(&tx_stats->syncp); 292 293 tx_busy: 294 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) { 295 netif_tx_wake_queue(net_txq); 296 apc->eth_stats.wake_queue++; 297 } 298 299 kfree(pkg.sgl_ptr); 300 return err; 301 302 free_sgl_ptr: 303 kfree(pkg.sgl_ptr); 304 tx_drop_count: 305 ndev->stats.tx_dropped++; 306 tx_drop: 307 dev_kfree_skb_any(skb); 308 return NETDEV_TX_OK; 309 } 310 311 static void mana_get_stats64(struct net_device *ndev, 312 struct rtnl_link_stats64 *st) 313 { 314 struct mana_port_context *apc = netdev_priv(ndev); 315 unsigned int num_queues = apc->num_queues; 316 struct mana_stats_rx *rx_stats; 317 struct mana_stats_tx *tx_stats; 318 unsigned int start; 319 u64 packets, bytes; 320 int q; 321 322 if (!apc->port_is_up) 323 return; 324 325 netdev_stats_to_stats64(st, &ndev->stats); 326 327 for (q = 0; q < num_queues; q++) { 328 rx_stats = &apc->rxqs[q]->stats; 329 330 do { 331 start = u64_stats_fetch_begin(&rx_stats->syncp); 332 packets = rx_stats->packets; 333 bytes = rx_stats->bytes; 334 } while (u64_stats_fetch_retry(&rx_stats->syncp, start)); 335 336 st->rx_packets += packets; 337 st->rx_bytes += bytes; 338 } 339 340 for (q = 0; q < num_queues; q++) { 341 tx_stats = &apc->tx_qp[q].txq.stats; 342 343 do { 344 start = u64_stats_fetch_begin(&tx_stats->syncp); 345 packets = tx_stats->packets; 346 bytes = tx_stats->bytes; 347 } while (u64_stats_fetch_retry(&tx_stats->syncp, start)); 348 349 st->tx_packets += packets; 350 st->tx_bytes += bytes; 351 } 352 } 353 354 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb, 355 int old_q) 356 { 357 struct mana_port_context *apc = netdev_priv(ndev); 358 u32 hash = skb_get_hash(skb); 359 struct sock *sk = skb->sk; 360 int txq; 361 362 txq = apc->indir_table[hash & MANA_INDIRECT_TABLE_MASK]; 363 364 if (txq != old_q && sk && sk_fullsock(sk) && 365 rcu_access_pointer(sk->sk_dst_cache)) 366 sk_tx_queue_set(sk, txq); 367 368 return txq; 369 } 370 371 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb, 372 struct net_device *sb_dev) 373 { 374 int txq; 375 376 if (ndev->real_num_tx_queues == 1) 377 return 0; 378 379 txq = sk_tx_queue_get(skb->sk); 380 381 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) { 382 if (skb_rx_queue_recorded(skb)) 383 txq = skb_get_rx_queue(skb); 384 else 385 txq = mana_get_tx_queue(ndev, skb, txq); 386 } 387 388 return txq; 389 } 390 391 static const struct net_device_ops mana_devops = { 392 .ndo_open = mana_open, 393 .ndo_stop = mana_close, 394 .ndo_select_queue = mana_select_queue, 395 .ndo_start_xmit = mana_start_xmit, 396 .ndo_validate_addr = eth_validate_addr, 397 .ndo_get_stats64 = mana_get_stats64, 398 .ndo_bpf = mana_bpf, 399 .ndo_xdp_xmit = mana_xdp_xmit, 400 }; 401 402 static void mana_cleanup_port_context(struct mana_port_context *apc) 403 { 404 kfree(apc->rxqs); 405 apc->rxqs = NULL; 406 } 407 408 static int mana_init_port_context(struct mana_port_context *apc) 409 { 410 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 411 GFP_KERNEL); 412 413 return !apc->rxqs ? -ENOMEM : 0; 414 } 415 416 static int mana_send_request(struct mana_context *ac, void *in_buf, 417 u32 in_len, void *out_buf, u32 out_len) 418 { 419 struct gdma_context *gc = ac->gdma_dev->gdma_context; 420 struct gdma_resp_hdr *resp = out_buf; 421 struct gdma_req_hdr *req = in_buf; 422 struct device *dev = gc->dev; 423 static atomic_t activity_id; 424 int err; 425 426 req->dev_id = gc->mana.dev_id; 427 req->activity_id = atomic_inc_return(&activity_id); 428 429 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 430 out_buf); 431 if (err || resp->status) { 432 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 433 err, resp->status); 434 return err ? err : -EPROTO; 435 } 436 437 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 438 req->activity_id != resp->activity_id) { 439 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 440 req->dev_id.as_uint32, resp->dev_id.as_uint32, 441 req->activity_id, resp->activity_id); 442 return -EPROTO; 443 } 444 445 return 0; 446 } 447 448 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 449 const enum mana_command_code expected_code, 450 const u32 min_size) 451 { 452 if (resp_hdr->response.msg_type != expected_code) 453 return -EPROTO; 454 455 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 456 return -EPROTO; 457 458 if (resp_hdr->response.msg_size < min_size) 459 return -EPROTO; 460 461 return 0; 462 } 463 464 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 465 { 466 struct mana_register_hw_vport_resp resp = {}; 467 struct mana_register_hw_vport_req req = {}; 468 int err; 469 470 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 471 sizeof(req), sizeof(resp)); 472 req.attached_gfid = 1; 473 req.is_pf_default_vport = 1; 474 req.allow_all_ether_types = 1; 475 476 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 477 sizeof(resp)); 478 if (err) { 479 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 480 return err; 481 } 482 483 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 484 sizeof(resp)); 485 if (err || resp.hdr.status) { 486 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 487 err, resp.hdr.status); 488 return err ? err : -EPROTO; 489 } 490 491 apc->port_handle = resp.hw_vport_handle; 492 return 0; 493 } 494 495 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 496 { 497 struct mana_deregister_hw_vport_resp resp = {}; 498 struct mana_deregister_hw_vport_req req = {}; 499 int err; 500 501 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 502 sizeof(req), sizeof(resp)); 503 req.hw_vport_handle = apc->port_handle; 504 505 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 506 sizeof(resp)); 507 if (err) { 508 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 509 err); 510 return; 511 } 512 513 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 514 sizeof(resp)); 515 if (err || resp.hdr.status) 516 netdev_err(apc->ndev, 517 "Failed to deregister hw vPort: %d, 0x%x\n", 518 err, resp.hdr.status); 519 } 520 521 static int mana_pf_register_filter(struct mana_port_context *apc) 522 { 523 struct mana_register_filter_resp resp = {}; 524 struct mana_register_filter_req req = {}; 525 int err; 526 527 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 528 sizeof(req), sizeof(resp)); 529 req.vport = apc->port_handle; 530 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 531 532 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 533 sizeof(resp)); 534 if (err) { 535 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 536 return err; 537 } 538 539 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 540 sizeof(resp)); 541 if (err || resp.hdr.status) { 542 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 543 err, resp.hdr.status); 544 return err ? err : -EPROTO; 545 } 546 547 apc->pf_filter_handle = resp.filter_handle; 548 return 0; 549 } 550 551 static void mana_pf_deregister_filter(struct mana_port_context *apc) 552 { 553 struct mana_deregister_filter_resp resp = {}; 554 struct mana_deregister_filter_req req = {}; 555 int err; 556 557 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 558 sizeof(req), sizeof(resp)); 559 req.filter_handle = apc->pf_filter_handle; 560 561 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 562 sizeof(resp)); 563 if (err) { 564 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 565 err); 566 return; 567 } 568 569 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 570 sizeof(resp)); 571 if (err || resp.hdr.status) 572 netdev_err(apc->ndev, 573 "Failed to deregister filter: %d, 0x%x\n", 574 err, resp.hdr.status); 575 } 576 577 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 578 u32 proto_minor_ver, u32 proto_micro_ver, 579 u16 *max_num_vports) 580 { 581 struct gdma_context *gc = ac->gdma_dev->gdma_context; 582 struct mana_query_device_cfg_resp resp = {}; 583 struct mana_query_device_cfg_req req = {}; 584 struct device *dev = gc->dev; 585 int err = 0; 586 587 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 588 sizeof(req), sizeof(resp)); 589 req.proto_major_ver = proto_major_ver; 590 req.proto_minor_ver = proto_minor_ver; 591 req.proto_micro_ver = proto_micro_ver; 592 593 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 594 if (err) { 595 dev_err(dev, "Failed to query config: %d", err); 596 return err; 597 } 598 599 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 600 sizeof(resp)); 601 if (err || resp.hdr.status) { 602 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 603 resp.hdr.status); 604 if (!err) 605 err = -EPROTO; 606 return err; 607 } 608 609 *max_num_vports = resp.max_num_vports; 610 611 return 0; 612 } 613 614 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 615 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 616 { 617 struct mana_query_vport_cfg_resp resp = {}; 618 struct mana_query_vport_cfg_req req = {}; 619 int err; 620 621 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 622 sizeof(req), sizeof(resp)); 623 624 req.vport_index = vport_index; 625 626 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 627 sizeof(resp)); 628 if (err) 629 return err; 630 631 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 632 sizeof(resp)); 633 if (err) 634 return err; 635 636 if (resp.hdr.status) 637 return -EPROTO; 638 639 *max_sq = resp.max_num_sq; 640 *max_rq = resp.max_num_rq; 641 *num_indir_entry = resp.num_indirection_ent; 642 643 apc->port_handle = resp.vport; 644 ether_addr_copy(apc->mac_addr, resp.mac_addr); 645 646 return 0; 647 } 648 649 void mana_uncfg_vport(struct mana_port_context *apc) 650 { 651 mutex_lock(&apc->vport_mutex); 652 apc->vport_use_count--; 653 WARN_ON(apc->vport_use_count < 0); 654 mutex_unlock(&apc->vport_mutex); 655 } 656 EXPORT_SYMBOL_NS(mana_uncfg_vport, NET_MANA); 657 658 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 659 u32 doorbell_pg_id) 660 { 661 struct mana_config_vport_resp resp = {}; 662 struct mana_config_vport_req req = {}; 663 int err; 664 665 /* This function is used to program the Ethernet port in the hardware 666 * table. It can be called from the Ethernet driver or the RDMA driver. 667 * 668 * For Ethernet usage, the hardware supports only one active user on a 669 * physical port. The driver checks on the port usage before programming 670 * the hardware when creating the RAW QP (RDMA driver) or exposing the 671 * device to kernel NET layer (Ethernet driver). 672 * 673 * Because the RDMA driver doesn't know in advance which QP type the 674 * user will create, it exposes the device with all its ports. The user 675 * may not be able to create RAW QP on a port if this port is already 676 * in used by the Ethernet driver from the kernel. 677 * 678 * This physical port limitation only applies to the RAW QP. For RC QP, 679 * the hardware doesn't have this limitation. The user can create RC 680 * QPs on a physical port up to the hardware limits independent of the 681 * Ethernet usage on the same port. 682 */ 683 mutex_lock(&apc->vport_mutex); 684 if (apc->vport_use_count > 0) { 685 mutex_unlock(&apc->vport_mutex); 686 return -EBUSY; 687 } 688 apc->vport_use_count++; 689 mutex_unlock(&apc->vport_mutex); 690 691 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 692 sizeof(req), sizeof(resp)); 693 req.vport = apc->port_handle; 694 req.pdid = protection_dom_id; 695 req.doorbell_pageid = doorbell_pg_id; 696 697 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 698 sizeof(resp)); 699 if (err) { 700 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 701 goto out; 702 } 703 704 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 705 sizeof(resp)); 706 if (err || resp.hdr.status) { 707 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 708 err, resp.hdr.status); 709 if (!err) 710 err = -EPROTO; 711 712 goto out; 713 } 714 715 apc->tx_shortform_allowed = resp.short_form_allowed; 716 apc->tx_vp_offset = resp.tx_vport_offset; 717 718 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 719 apc->port_handle, protection_dom_id, doorbell_pg_id); 720 out: 721 if (err) 722 mana_uncfg_vport(apc); 723 724 return err; 725 } 726 EXPORT_SYMBOL_NS(mana_cfg_vport, NET_MANA); 727 728 static int mana_cfg_vport_steering(struct mana_port_context *apc, 729 enum TRI_STATE rx, 730 bool update_default_rxobj, bool update_key, 731 bool update_tab) 732 { 733 u16 num_entries = MANA_INDIRECT_TABLE_SIZE; 734 struct mana_cfg_rx_steer_req *req = NULL; 735 struct mana_cfg_rx_steer_resp resp = {}; 736 struct net_device *ndev = apc->ndev; 737 mana_handle_t *req_indir_tab; 738 u32 req_buf_size; 739 int err; 740 741 req_buf_size = sizeof(*req) + sizeof(mana_handle_t) * num_entries; 742 req = kzalloc(req_buf_size, GFP_KERNEL); 743 if (!req) 744 return -ENOMEM; 745 746 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 747 sizeof(resp)); 748 749 req->vport = apc->port_handle; 750 req->num_indir_entries = num_entries; 751 req->indir_tab_offset = sizeof(*req); 752 req->rx_enable = rx; 753 req->rss_enable = apc->rss_state; 754 req->update_default_rxobj = update_default_rxobj; 755 req->update_hashkey = update_key; 756 req->update_indir_tab = update_tab; 757 req->default_rxobj = apc->default_rxobj; 758 759 if (update_key) 760 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 761 762 if (update_tab) { 763 req_indir_tab = (mana_handle_t *)(req + 1); 764 memcpy(req_indir_tab, apc->rxobj_table, 765 req->num_indir_entries * sizeof(mana_handle_t)); 766 } 767 768 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 769 sizeof(resp)); 770 if (err) { 771 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 772 goto out; 773 } 774 775 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 776 sizeof(resp)); 777 if (err) { 778 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 779 goto out; 780 } 781 782 if (resp.hdr.status) { 783 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 784 resp.hdr.status); 785 err = -EPROTO; 786 } 787 788 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 789 apc->port_handle, num_entries); 790 out: 791 kfree(req); 792 return err; 793 } 794 795 int mana_create_wq_obj(struct mana_port_context *apc, 796 mana_handle_t vport, 797 u32 wq_type, struct mana_obj_spec *wq_spec, 798 struct mana_obj_spec *cq_spec, 799 mana_handle_t *wq_obj) 800 { 801 struct mana_create_wqobj_resp resp = {}; 802 struct mana_create_wqobj_req req = {}; 803 struct net_device *ndev = apc->ndev; 804 int err; 805 806 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 807 sizeof(req), sizeof(resp)); 808 req.vport = vport; 809 req.wq_type = wq_type; 810 req.wq_gdma_region = wq_spec->gdma_region; 811 req.cq_gdma_region = cq_spec->gdma_region; 812 req.wq_size = wq_spec->queue_size; 813 req.cq_size = cq_spec->queue_size; 814 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 815 req.cq_parent_qid = cq_spec->attached_eq; 816 817 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 818 sizeof(resp)); 819 if (err) { 820 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 821 goto out; 822 } 823 824 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 825 sizeof(resp)); 826 if (err || resp.hdr.status) { 827 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 828 resp.hdr.status); 829 if (!err) 830 err = -EPROTO; 831 goto out; 832 } 833 834 if (resp.wq_obj == INVALID_MANA_HANDLE) { 835 netdev_err(ndev, "Got an invalid WQ object handle\n"); 836 err = -EPROTO; 837 goto out; 838 } 839 840 *wq_obj = resp.wq_obj; 841 wq_spec->queue_index = resp.wq_id; 842 cq_spec->queue_index = resp.cq_id; 843 844 return 0; 845 out: 846 return err; 847 } 848 EXPORT_SYMBOL_NS(mana_create_wq_obj, NET_MANA); 849 850 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 851 mana_handle_t wq_obj) 852 { 853 struct mana_destroy_wqobj_resp resp = {}; 854 struct mana_destroy_wqobj_req req = {}; 855 struct net_device *ndev = apc->ndev; 856 int err; 857 858 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 859 sizeof(req), sizeof(resp)); 860 req.wq_type = wq_type; 861 req.wq_obj_handle = wq_obj; 862 863 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 864 sizeof(resp)); 865 if (err) { 866 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 867 return; 868 } 869 870 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 871 sizeof(resp)); 872 if (err || resp.hdr.status) 873 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 874 resp.hdr.status); 875 } 876 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, NET_MANA); 877 878 static void mana_destroy_eq(struct mana_context *ac) 879 { 880 struct gdma_context *gc = ac->gdma_dev->gdma_context; 881 struct gdma_queue *eq; 882 int i; 883 884 if (!ac->eqs) 885 return; 886 887 for (i = 0; i < gc->max_num_queues; i++) { 888 eq = ac->eqs[i].eq; 889 if (!eq) 890 continue; 891 892 mana_gd_destroy_queue(gc, eq); 893 } 894 895 kfree(ac->eqs); 896 ac->eqs = NULL; 897 } 898 899 static int mana_create_eq(struct mana_context *ac) 900 { 901 struct gdma_dev *gd = ac->gdma_dev; 902 struct gdma_context *gc = gd->gdma_context; 903 struct gdma_queue_spec spec = {}; 904 int err; 905 int i; 906 907 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq), 908 GFP_KERNEL); 909 if (!ac->eqs) 910 return -ENOMEM; 911 912 spec.type = GDMA_EQ; 913 spec.monitor_avl_buf = false; 914 spec.queue_size = EQ_SIZE; 915 spec.eq.callback = NULL; 916 spec.eq.context = ac->eqs; 917 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 918 919 for (i = 0; i < gc->max_num_queues; i++) { 920 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 921 if (err) 922 goto out; 923 } 924 925 return 0; 926 out: 927 mana_destroy_eq(ac); 928 return err; 929 } 930 931 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 932 { 933 struct mana_fence_rq_resp resp = {}; 934 struct mana_fence_rq_req req = {}; 935 int err; 936 937 init_completion(&rxq->fence_event); 938 939 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 940 sizeof(req), sizeof(resp)); 941 req.wq_obj_handle = rxq->rxobj; 942 943 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 944 sizeof(resp)); 945 if (err) { 946 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 947 rxq->rxq_idx, err); 948 return err; 949 } 950 951 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 952 if (err || resp.hdr.status) { 953 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 954 rxq->rxq_idx, err, resp.hdr.status); 955 if (!err) 956 err = -EPROTO; 957 958 return err; 959 } 960 961 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 962 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 963 rxq->rxq_idx); 964 return -ETIMEDOUT; 965 } 966 967 return 0; 968 } 969 970 static void mana_fence_rqs(struct mana_port_context *apc) 971 { 972 unsigned int rxq_idx; 973 struct mana_rxq *rxq; 974 int err; 975 976 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 977 rxq = apc->rxqs[rxq_idx]; 978 err = mana_fence_rq(apc, rxq); 979 980 /* In case of any error, use sleep instead. */ 981 if (err) 982 msleep(100); 983 } 984 } 985 986 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 987 { 988 u32 used_space_old; 989 u32 used_space_new; 990 991 used_space_old = wq->head - wq->tail; 992 used_space_new = wq->head - (wq->tail + num_units); 993 994 if (WARN_ON_ONCE(used_space_new > used_space_old)) 995 return -ERANGE; 996 997 wq->tail += num_units; 998 return 0; 999 } 1000 1001 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1002 { 1003 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1004 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1005 struct device *dev = gc->dev; 1006 int i; 1007 1008 dma_unmap_single(dev, ash->dma_handle[0], ash->size[0], DMA_TO_DEVICE); 1009 1010 for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) 1011 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1012 DMA_TO_DEVICE); 1013 } 1014 1015 static void mana_poll_tx_cq(struct mana_cq *cq) 1016 { 1017 struct gdma_comp *completions = cq->gdma_comp_buf; 1018 struct gdma_posted_wqe_info *wqe_info; 1019 unsigned int pkt_transmitted = 0; 1020 unsigned int wqe_unit_cnt = 0; 1021 struct mana_txq *txq = cq->txq; 1022 struct mana_port_context *apc; 1023 struct netdev_queue *net_txq; 1024 struct gdma_queue *gdma_wq; 1025 unsigned int avail_space; 1026 struct net_device *ndev; 1027 struct sk_buff *skb; 1028 bool txq_stopped; 1029 int comp_read; 1030 int i; 1031 1032 ndev = txq->ndev; 1033 apc = netdev_priv(ndev); 1034 1035 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1036 CQE_POLLING_BUFFER); 1037 1038 if (comp_read < 1) 1039 return; 1040 1041 for (i = 0; i < comp_read; i++) { 1042 struct mana_tx_comp_oob *cqe_oob; 1043 1044 if (WARN_ON_ONCE(!completions[i].is_sq)) 1045 return; 1046 1047 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1048 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1049 MANA_CQE_COMPLETION)) 1050 return; 1051 1052 switch (cqe_oob->cqe_hdr.cqe_type) { 1053 case CQE_TX_OKAY: 1054 break; 1055 1056 case CQE_TX_SA_DROP: 1057 case CQE_TX_MTU_DROP: 1058 case CQE_TX_INVALID_OOB: 1059 case CQE_TX_INVALID_ETH_TYPE: 1060 case CQE_TX_HDR_PROCESSING_ERROR: 1061 case CQE_TX_VF_DISABLED: 1062 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1063 case CQE_TX_VPORT_DISABLED: 1064 case CQE_TX_VLAN_TAGGING_VIOLATION: 1065 WARN_ONCE(1, "TX: CQE error %d: ignored.\n", 1066 cqe_oob->cqe_hdr.cqe_type); 1067 break; 1068 1069 default: 1070 /* If the CQE type is unexpected, log an error, assert, 1071 * and go through the error path. 1072 */ 1073 WARN_ONCE(1, "TX: Unexpected CQE type %d: HW BUG?\n", 1074 cqe_oob->cqe_hdr.cqe_type); 1075 return; 1076 } 1077 1078 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1079 return; 1080 1081 skb = skb_dequeue(&txq->pending_skbs); 1082 if (WARN_ON_ONCE(!skb)) 1083 return; 1084 1085 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1086 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1087 1088 mana_unmap_skb(skb, apc); 1089 1090 napi_consume_skb(skb, cq->budget); 1091 1092 pkt_transmitted++; 1093 } 1094 1095 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1096 return; 1097 1098 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1099 1100 gdma_wq = txq->gdma_sq; 1101 avail_space = mana_gd_wq_avail_space(gdma_wq); 1102 1103 /* Ensure tail updated before checking q stop */ 1104 smp_mb(); 1105 1106 net_txq = txq->net_txq; 1107 txq_stopped = netif_tx_queue_stopped(net_txq); 1108 1109 /* Ensure checking txq_stopped before apc->port_is_up. */ 1110 smp_rmb(); 1111 1112 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1113 netif_tx_wake_queue(net_txq); 1114 apc->eth_stats.wake_queue++; 1115 } 1116 1117 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1118 WARN_ON_ONCE(1); 1119 1120 cq->work_done = pkt_transmitted; 1121 } 1122 1123 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1124 { 1125 struct mana_recv_buf_oob *recv_buf_oob; 1126 u32 curr_index; 1127 int err; 1128 1129 curr_index = rxq->buf_index++; 1130 if (rxq->buf_index == rxq->num_rx_buf) 1131 rxq->buf_index = 0; 1132 1133 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1134 1135 err = mana_gd_post_and_ring(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1136 &recv_buf_oob->wqe_inf); 1137 if (WARN_ON_ONCE(err)) 1138 return; 1139 1140 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1141 } 1142 1143 static struct sk_buff *mana_build_skb(void *buf_va, uint pkt_len, 1144 struct xdp_buff *xdp) 1145 { 1146 struct sk_buff *skb = build_skb(buf_va, PAGE_SIZE); 1147 1148 if (!skb) 1149 return NULL; 1150 1151 if (xdp->data_hard_start) { 1152 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1153 skb_put(skb, xdp->data_end - xdp->data); 1154 } else { 1155 skb_reserve(skb, XDP_PACKET_HEADROOM); 1156 skb_put(skb, pkt_len); 1157 } 1158 1159 return skb; 1160 } 1161 1162 static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, 1163 struct mana_rxq *rxq) 1164 { 1165 struct mana_stats_rx *rx_stats = &rxq->stats; 1166 struct net_device *ndev = rxq->ndev; 1167 uint pkt_len = cqe->ppi[0].pkt_len; 1168 u16 rxq_idx = rxq->rxq_idx; 1169 struct napi_struct *napi; 1170 struct xdp_buff xdp = {}; 1171 struct sk_buff *skb; 1172 u32 hash_value; 1173 u32 act; 1174 1175 rxq->rx_cq.work_done++; 1176 napi = &rxq->rx_cq.napi; 1177 1178 if (!buf_va) { 1179 ++ndev->stats.rx_dropped; 1180 return; 1181 } 1182 1183 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1184 1185 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1186 return; 1187 1188 if (act != XDP_PASS && act != XDP_TX) 1189 goto drop_xdp; 1190 1191 skb = mana_build_skb(buf_va, pkt_len, &xdp); 1192 1193 if (!skb) 1194 goto drop; 1195 1196 skb->dev = napi->dev; 1197 1198 skb->protocol = eth_type_trans(skb, ndev); 1199 skb_checksum_none_assert(skb); 1200 skb_record_rx_queue(skb, rxq_idx); 1201 1202 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1203 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1204 skb->ip_summed = CHECKSUM_UNNECESSARY; 1205 } 1206 1207 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1208 hash_value = cqe->ppi[0].pkt_hash; 1209 1210 if (cqe->rx_hashtype & MANA_HASH_L4) 1211 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1212 else 1213 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1214 } 1215 1216 u64_stats_update_begin(&rx_stats->syncp); 1217 rx_stats->packets++; 1218 rx_stats->bytes += pkt_len; 1219 1220 if (act == XDP_TX) 1221 rx_stats->xdp_tx++; 1222 u64_stats_update_end(&rx_stats->syncp); 1223 1224 if (act == XDP_TX) { 1225 skb_set_queue_mapping(skb, rxq_idx); 1226 mana_xdp_tx(skb, ndev); 1227 return; 1228 } 1229 1230 napi_gro_receive(napi, skb); 1231 1232 return; 1233 1234 drop_xdp: 1235 u64_stats_update_begin(&rx_stats->syncp); 1236 rx_stats->xdp_drop++; 1237 u64_stats_update_end(&rx_stats->syncp); 1238 1239 drop: 1240 WARN_ON_ONCE(rxq->xdp_save_page); 1241 rxq->xdp_save_page = virt_to_page(buf_va); 1242 1243 ++ndev->stats.rx_dropped; 1244 1245 return; 1246 } 1247 1248 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1249 struct gdma_comp *cqe) 1250 { 1251 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1252 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1253 struct net_device *ndev = rxq->ndev; 1254 struct mana_recv_buf_oob *rxbuf_oob; 1255 struct device *dev = gc->dev; 1256 void *new_buf, *old_buf; 1257 struct page *new_page; 1258 u32 curr, pktlen; 1259 dma_addr_t da; 1260 1261 switch (oob->cqe_hdr.cqe_type) { 1262 case CQE_RX_OKAY: 1263 break; 1264 1265 case CQE_RX_TRUNCATED: 1266 ++ndev->stats.rx_dropped; 1267 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1268 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1269 goto drop; 1270 1271 case CQE_RX_COALESCED_4: 1272 netdev_err(ndev, "RX coalescing is unsupported\n"); 1273 return; 1274 1275 case CQE_RX_OBJECT_FENCE: 1276 complete(&rxq->fence_event); 1277 return; 1278 1279 default: 1280 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1281 oob->cqe_hdr.cqe_type); 1282 return; 1283 } 1284 1285 pktlen = oob->ppi[0].pkt_len; 1286 1287 if (pktlen == 0) { 1288 /* data packets should never have packetlength of zero */ 1289 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1290 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1291 return; 1292 } 1293 1294 curr = rxq->buf_index; 1295 rxbuf_oob = &rxq->rx_oobs[curr]; 1296 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1297 1298 /* Reuse XDP dropped page if available */ 1299 if (rxq->xdp_save_page) { 1300 new_page = rxq->xdp_save_page; 1301 rxq->xdp_save_page = NULL; 1302 } else { 1303 new_page = alloc_page(GFP_ATOMIC); 1304 } 1305 1306 if (new_page) { 1307 da = dma_map_page(dev, new_page, XDP_PACKET_HEADROOM, rxq->datasize, 1308 DMA_FROM_DEVICE); 1309 1310 if (dma_mapping_error(dev, da)) { 1311 __free_page(new_page); 1312 new_page = NULL; 1313 } 1314 } 1315 1316 new_buf = new_page ? page_to_virt(new_page) : NULL; 1317 1318 if (new_buf) { 1319 dma_unmap_page(dev, rxbuf_oob->buf_dma_addr, rxq->datasize, 1320 DMA_FROM_DEVICE); 1321 1322 old_buf = rxbuf_oob->buf_va; 1323 1324 /* refresh the rxbuf_oob with the new page */ 1325 rxbuf_oob->buf_va = new_buf; 1326 rxbuf_oob->buf_dma_addr = da; 1327 rxbuf_oob->sgl[0].address = rxbuf_oob->buf_dma_addr; 1328 } else { 1329 old_buf = NULL; /* drop the packet if no memory */ 1330 } 1331 1332 mana_rx_skb(old_buf, oob, rxq); 1333 1334 drop: 1335 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1336 1337 mana_post_pkt_rxq(rxq); 1338 } 1339 1340 static void mana_poll_rx_cq(struct mana_cq *cq) 1341 { 1342 struct gdma_comp *comp = cq->gdma_comp_buf; 1343 struct mana_rxq *rxq = cq->rxq; 1344 int comp_read, i; 1345 1346 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1347 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1348 1349 rxq->xdp_flush = false; 1350 1351 for (i = 0; i < comp_read; i++) { 1352 if (WARN_ON_ONCE(comp[i].is_sq)) 1353 return; 1354 1355 /* verify recv cqe references the right rxq */ 1356 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1357 return; 1358 1359 mana_process_rx_cqe(rxq, cq, &comp[i]); 1360 } 1361 1362 if (rxq->xdp_flush) 1363 xdp_do_flush(); 1364 } 1365 1366 static void mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1367 { 1368 struct mana_cq *cq = context; 1369 u8 arm_bit; 1370 1371 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1372 1373 if (cq->type == MANA_CQ_TYPE_RX) 1374 mana_poll_rx_cq(cq); 1375 else 1376 mana_poll_tx_cq(cq); 1377 1378 if (cq->work_done < cq->budget && 1379 napi_complete_done(&cq->napi, cq->work_done)) { 1380 arm_bit = SET_ARM_BIT; 1381 } else { 1382 arm_bit = 0; 1383 } 1384 1385 mana_gd_ring_cq(gdma_queue, arm_bit); 1386 } 1387 1388 static int mana_poll(struct napi_struct *napi, int budget) 1389 { 1390 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1391 1392 cq->work_done = 0; 1393 cq->budget = budget; 1394 1395 mana_cq_handler(cq, cq->gdma_cq); 1396 1397 return min(cq->work_done, budget); 1398 } 1399 1400 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1401 { 1402 struct mana_cq *cq = context; 1403 1404 napi_schedule_irqoff(&cq->napi); 1405 } 1406 1407 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1408 { 1409 struct gdma_dev *gd = apc->ac->gdma_dev; 1410 1411 if (!cq->gdma_cq) 1412 return; 1413 1414 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1415 } 1416 1417 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1418 { 1419 struct gdma_dev *gd = apc->ac->gdma_dev; 1420 1421 if (!txq->gdma_sq) 1422 return; 1423 1424 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1425 } 1426 1427 static void mana_destroy_txq(struct mana_port_context *apc) 1428 { 1429 struct napi_struct *napi; 1430 int i; 1431 1432 if (!apc->tx_qp) 1433 return; 1434 1435 for (i = 0; i < apc->num_queues; i++) { 1436 napi = &apc->tx_qp[i].tx_cq.napi; 1437 napi_synchronize(napi); 1438 napi_disable(napi); 1439 netif_napi_del(napi); 1440 1441 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1442 1443 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1444 1445 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1446 } 1447 1448 kfree(apc->tx_qp); 1449 apc->tx_qp = NULL; 1450 } 1451 1452 static int mana_create_txq(struct mana_port_context *apc, 1453 struct net_device *net) 1454 { 1455 struct mana_context *ac = apc->ac; 1456 struct gdma_dev *gd = ac->gdma_dev; 1457 struct mana_obj_spec wq_spec; 1458 struct mana_obj_spec cq_spec; 1459 struct gdma_queue_spec spec; 1460 struct gdma_context *gc; 1461 struct mana_txq *txq; 1462 struct mana_cq *cq; 1463 u32 txq_size; 1464 u32 cq_size; 1465 int err; 1466 int i; 1467 1468 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1469 GFP_KERNEL); 1470 if (!apc->tx_qp) 1471 return -ENOMEM; 1472 1473 /* The minimum size of the WQE is 32 bytes, hence 1474 * MAX_SEND_BUFFERS_PER_QUEUE represents the maximum number of WQEs 1475 * the SQ can store. This value is then used to size other queues 1476 * to prevent overflow. 1477 */ 1478 txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32; 1479 BUILD_BUG_ON(!PAGE_ALIGNED(txq_size)); 1480 1481 cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE; 1482 cq_size = PAGE_ALIGN(cq_size); 1483 1484 gc = gd->gdma_context; 1485 1486 for (i = 0; i < apc->num_queues; i++) { 1487 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1488 1489 /* Create SQ */ 1490 txq = &apc->tx_qp[i].txq; 1491 1492 u64_stats_init(&txq->stats.syncp); 1493 txq->ndev = net; 1494 txq->net_txq = netdev_get_tx_queue(net, i); 1495 txq->vp_offset = apc->tx_vp_offset; 1496 skb_queue_head_init(&txq->pending_skbs); 1497 1498 memset(&spec, 0, sizeof(spec)); 1499 spec.type = GDMA_SQ; 1500 spec.monitor_avl_buf = true; 1501 spec.queue_size = txq_size; 1502 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 1503 if (err) 1504 goto out; 1505 1506 /* Create SQ's CQ */ 1507 cq = &apc->tx_qp[i].tx_cq; 1508 cq->type = MANA_CQ_TYPE_TX; 1509 1510 cq->txq = txq; 1511 1512 memset(&spec, 0, sizeof(spec)); 1513 spec.type = GDMA_CQ; 1514 spec.monitor_avl_buf = false; 1515 spec.queue_size = cq_size; 1516 spec.cq.callback = mana_schedule_napi; 1517 spec.cq.parent_eq = ac->eqs[i].eq; 1518 spec.cq.context = cq; 1519 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 1520 if (err) 1521 goto out; 1522 1523 memset(&wq_spec, 0, sizeof(wq_spec)); 1524 memset(&cq_spec, 0, sizeof(cq_spec)); 1525 1526 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 1527 wq_spec.queue_size = txq->gdma_sq->queue_size; 1528 1529 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 1530 cq_spec.queue_size = cq->gdma_cq->queue_size; 1531 cq_spec.modr_ctx_id = 0; 1532 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 1533 1534 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 1535 &wq_spec, &cq_spec, 1536 &apc->tx_qp[i].tx_object); 1537 1538 if (err) 1539 goto out; 1540 1541 txq->gdma_sq->id = wq_spec.queue_index; 1542 cq->gdma_cq->id = cq_spec.queue_index; 1543 1544 txq->gdma_sq->mem_info.dma_region_handle = 1545 GDMA_INVALID_DMA_REGION; 1546 cq->gdma_cq->mem_info.dma_region_handle = 1547 GDMA_INVALID_DMA_REGION; 1548 1549 txq->gdma_txq_id = txq->gdma_sq->id; 1550 1551 cq->gdma_id = cq->gdma_cq->id; 1552 1553 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 1554 err = -EINVAL; 1555 goto out; 1556 } 1557 1558 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 1559 1560 netif_napi_add_tx(net, &cq->napi, mana_poll); 1561 napi_enable(&cq->napi); 1562 1563 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 1564 } 1565 1566 return 0; 1567 out: 1568 mana_destroy_txq(apc); 1569 return err; 1570 } 1571 1572 static void mana_destroy_rxq(struct mana_port_context *apc, 1573 struct mana_rxq *rxq, bool validate_state) 1574 1575 { 1576 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1577 struct mana_recv_buf_oob *rx_oob; 1578 struct device *dev = gc->dev; 1579 struct napi_struct *napi; 1580 int i; 1581 1582 if (!rxq) 1583 return; 1584 1585 napi = &rxq->rx_cq.napi; 1586 1587 if (validate_state) 1588 napi_synchronize(napi); 1589 1590 napi_disable(napi); 1591 1592 xdp_rxq_info_unreg(&rxq->xdp_rxq); 1593 1594 netif_napi_del(napi); 1595 1596 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 1597 1598 mana_deinit_cq(apc, &rxq->rx_cq); 1599 1600 if (rxq->xdp_save_page) 1601 __free_page(rxq->xdp_save_page); 1602 1603 for (i = 0; i < rxq->num_rx_buf; i++) { 1604 rx_oob = &rxq->rx_oobs[i]; 1605 1606 if (!rx_oob->buf_va) 1607 continue; 1608 1609 dma_unmap_page(dev, rx_oob->buf_dma_addr, rxq->datasize, 1610 DMA_FROM_DEVICE); 1611 1612 free_page((unsigned long)rx_oob->buf_va); 1613 rx_oob->buf_va = NULL; 1614 } 1615 1616 if (rxq->gdma_rq) 1617 mana_gd_destroy_queue(gc, rxq->gdma_rq); 1618 1619 kfree(rxq); 1620 } 1621 1622 #define MANA_WQE_HEADER_SIZE 16 1623 #define MANA_WQE_SGE_SIZE 16 1624 1625 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 1626 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 1627 { 1628 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1629 struct mana_recv_buf_oob *rx_oob; 1630 struct device *dev = gc->dev; 1631 struct page *page; 1632 dma_addr_t da; 1633 u32 buf_idx; 1634 1635 WARN_ON(rxq->datasize == 0 || rxq->datasize > PAGE_SIZE); 1636 1637 *rxq_size = 0; 1638 *cq_size = 0; 1639 1640 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 1641 rx_oob = &rxq->rx_oobs[buf_idx]; 1642 memset(rx_oob, 0, sizeof(*rx_oob)); 1643 1644 page = alloc_page(GFP_KERNEL); 1645 if (!page) 1646 return -ENOMEM; 1647 1648 da = dma_map_page(dev, page, XDP_PACKET_HEADROOM, rxq->datasize, 1649 DMA_FROM_DEVICE); 1650 1651 if (dma_mapping_error(dev, da)) { 1652 __free_page(page); 1653 return -ENOMEM; 1654 } 1655 1656 rx_oob->buf_va = page_to_virt(page); 1657 rx_oob->buf_dma_addr = da; 1658 1659 rx_oob->num_sge = 1; 1660 rx_oob->sgl[0].address = rx_oob->buf_dma_addr; 1661 rx_oob->sgl[0].size = rxq->datasize; 1662 rx_oob->sgl[0].mem_key = apc->ac->gdma_dev->gpa_mkey; 1663 1664 rx_oob->wqe_req.sgl = rx_oob->sgl; 1665 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 1666 rx_oob->wqe_req.inline_oob_size = 0; 1667 rx_oob->wqe_req.inline_oob_data = NULL; 1668 rx_oob->wqe_req.flags = 0; 1669 rx_oob->wqe_req.client_data_unit = 0; 1670 1671 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 1672 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 1673 *cq_size += COMP_ENTRY_SIZE; 1674 } 1675 1676 return 0; 1677 } 1678 1679 static int mana_push_wqe(struct mana_rxq *rxq) 1680 { 1681 struct mana_recv_buf_oob *rx_oob; 1682 u32 buf_idx; 1683 int err; 1684 1685 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 1686 rx_oob = &rxq->rx_oobs[buf_idx]; 1687 1688 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 1689 &rx_oob->wqe_inf); 1690 if (err) 1691 return -ENOSPC; 1692 } 1693 1694 return 0; 1695 } 1696 1697 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 1698 u32 rxq_idx, struct mana_eq *eq, 1699 struct net_device *ndev) 1700 { 1701 struct gdma_dev *gd = apc->ac->gdma_dev; 1702 struct mana_obj_spec wq_spec; 1703 struct mana_obj_spec cq_spec; 1704 struct gdma_queue_spec spec; 1705 struct mana_cq *cq = NULL; 1706 struct gdma_context *gc; 1707 u32 cq_size, rq_size; 1708 struct mana_rxq *rxq; 1709 int err; 1710 1711 gc = gd->gdma_context; 1712 1713 rxq = kzalloc(struct_size(rxq, rx_oobs, RX_BUFFERS_PER_QUEUE), 1714 GFP_KERNEL); 1715 if (!rxq) 1716 return NULL; 1717 1718 rxq->ndev = ndev; 1719 rxq->num_rx_buf = RX_BUFFERS_PER_QUEUE; 1720 rxq->rxq_idx = rxq_idx; 1721 rxq->datasize = ALIGN(MAX_FRAME_SIZE, 64); 1722 rxq->rxobj = INVALID_MANA_HANDLE; 1723 1724 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 1725 if (err) 1726 goto out; 1727 1728 rq_size = PAGE_ALIGN(rq_size); 1729 cq_size = PAGE_ALIGN(cq_size); 1730 1731 /* Create RQ */ 1732 memset(&spec, 0, sizeof(spec)); 1733 spec.type = GDMA_RQ; 1734 spec.monitor_avl_buf = true; 1735 spec.queue_size = rq_size; 1736 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 1737 if (err) 1738 goto out; 1739 1740 /* Create RQ's CQ */ 1741 cq = &rxq->rx_cq; 1742 cq->type = MANA_CQ_TYPE_RX; 1743 cq->rxq = rxq; 1744 1745 memset(&spec, 0, sizeof(spec)); 1746 spec.type = GDMA_CQ; 1747 spec.monitor_avl_buf = false; 1748 spec.queue_size = cq_size; 1749 spec.cq.callback = mana_schedule_napi; 1750 spec.cq.parent_eq = eq->eq; 1751 spec.cq.context = cq; 1752 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 1753 if (err) 1754 goto out; 1755 1756 memset(&wq_spec, 0, sizeof(wq_spec)); 1757 memset(&cq_spec, 0, sizeof(cq_spec)); 1758 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 1759 wq_spec.queue_size = rxq->gdma_rq->queue_size; 1760 1761 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 1762 cq_spec.queue_size = cq->gdma_cq->queue_size; 1763 cq_spec.modr_ctx_id = 0; 1764 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 1765 1766 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 1767 &wq_spec, &cq_spec, &rxq->rxobj); 1768 if (err) 1769 goto out; 1770 1771 rxq->gdma_rq->id = wq_spec.queue_index; 1772 cq->gdma_cq->id = cq_spec.queue_index; 1773 1774 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 1775 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 1776 1777 rxq->gdma_id = rxq->gdma_rq->id; 1778 cq->gdma_id = cq->gdma_cq->id; 1779 1780 err = mana_push_wqe(rxq); 1781 if (err) 1782 goto out; 1783 1784 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 1785 err = -EINVAL; 1786 goto out; 1787 } 1788 1789 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 1790 1791 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 1792 1793 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 1794 cq->napi.napi_id)); 1795 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, 1796 MEM_TYPE_PAGE_SHARED, NULL)); 1797 1798 napi_enable(&cq->napi); 1799 1800 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 1801 out: 1802 if (!err) 1803 return rxq; 1804 1805 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 1806 1807 mana_destroy_rxq(apc, rxq, false); 1808 1809 if (cq) 1810 mana_deinit_cq(apc, cq); 1811 1812 return NULL; 1813 } 1814 1815 static int mana_add_rx_queues(struct mana_port_context *apc, 1816 struct net_device *ndev) 1817 { 1818 struct mana_context *ac = apc->ac; 1819 struct mana_rxq *rxq; 1820 int err = 0; 1821 int i; 1822 1823 for (i = 0; i < apc->num_queues; i++) { 1824 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 1825 if (!rxq) { 1826 err = -ENOMEM; 1827 goto out; 1828 } 1829 1830 u64_stats_init(&rxq->stats.syncp); 1831 1832 apc->rxqs[i] = rxq; 1833 } 1834 1835 apc->default_rxobj = apc->rxqs[0]->rxobj; 1836 out: 1837 return err; 1838 } 1839 1840 static void mana_destroy_vport(struct mana_port_context *apc) 1841 { 1842 struct gdma_dev *gd = apc->ac->gdma_dev; 1843 struct mana_rxq *rxq; 1844 u32 rxq_idx; 1845 1846 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1847 rxq = apc->rxqs[rxq_idx]; 1848 if (!rxq) 1849 continue; 1850 1851 mana_destroy_rxq(apc, rxq, true); 1852 apc->rxqs[rxq_idx] = NULL; 1853 } 1854 1855 mana_destroy_txq(apc); 1856 mana_uncfg_vport(apc); 1857 1858 if (gd->gdma_context->is_pf) 1859 mana_pf_deregister_hw_vport(apc); 1860 } 1861 1862 static int mana_create_vport(struct mana_port_context *apc, 1863 struct net_device *net) 1864 { 1865 struct gdma_dev *gd = apc->ac->gdma_dev; 1866 int err; 1867 1868 apc->default_rxobj = INVALID_MANA_HANDLE; 1869 1870 if (gd->gdma_context->is_pf) { 1871 err = mana_pf_register_hw_vport(apc); 1872 if (err) 1873 return err; 1874 } 1875 1876 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 1877 if (err) 1878 return err; 1879 1880 return mana_create_txq(apc, net); 1881 } 1882 1883 static void mana_rss_table_init(struct mana_port_context *apc) 1884 { 1885 int i; 1886 1887 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 1888 apc->indir_table[i] = 1889 ethtool_rxfh_indir_default(i, apc->num_queues); 1890 } 1891 1892 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 1893 bool update_hash, bool update_tab) 1894 { 1895 u32 queue_idx; 1896 int err; 1897 int i; 1898 1899 if (update_tab) { 1900 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) { 1901 queue_idx = apc->indir_table[i]; 1902 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 1903 } 1904 } 1905 1906 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 1907 if (err) 1908 return err; 1909 1910 mana_fence_rqs(apc); 1911 1912 return 0; 1913 } 1914 1915 static int mana_init_port(struct net_device *ndev) 1916 { 1917 struct mana_port_context *apc = netdev_priv(ndev); 1918 u32 max_txq, max_rxq, max_queues; 1919 int port_idx = apc->port_idx; 1920 u32 num_indirect_entries; 1921 int err; 1922 1923 err = mana_init_port_context(apc); 1924 if (err) 1925 return err; 1926 1927 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 1928 &num_indirect_entries); 1929 if (err) { 1930 netdev_err(ndev, "Failed to query info for vPort %d\n", 1931 port_idx); 1932 goto reset_apc; 1933 } 1934 1935 max_queues = min_t(u32, max_txq, max_rxq); 1936 if (apc->max_queues > max_queues) 1937 apc->max_queues = max_queues; 1938 1939 if (apc->num_queues > apc->max_queues) 1940 apc->num_queues = apc->max_queues; 1941 1942 eth_hw_addr_set(ndev, apc->mac_addr); 1943 1944 return 0; 1945 1946 reset_apc: 1947 kfree(apc->rxqs); 1948 apc->rxqs = NULL; 1949 return err; 1950 } 1951 1952 int mana_alloc_queues(struct net_device *ndev) 1953 { 1954 struct mana_port_context *apc = netdev_priv(ndev); 1955 struct gdma_dev *gd = apc->ac->gdma_dev; 1956 int err; 1957 1958 err = mana_create_vport(apc, ndev); 1959 if (err) 1960 return err; 1961 1962 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 1963 if (err) 1964 goto destroy_vport; 1965 1966 err = mana_add_rx_queues(apc, ndev); 1967 if (err) 1968 goto destroy_vport; 1969 1970 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 1971 1972 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 1973 if (err) 1974 goto destroy_vport; 1975 1976 mana_rss_table_init(apc); 1977 1978 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 1979 if (err) 1980 goto destroy_vport; 1981 1982 if (gd->gdma_context->is_pf) { 1983 err = mana_pf_register_filter(apc); 1984 if (err) 1985 goto destroy_vport; 1986 } 1987 1988 mana_chn_setxdp(apc, mana_xdp_get(apc)); 1989 1990 return 0; 1991 1992 destroy_vport: 1993 mana_destroy_vport(apc); 1994 return err; 1995 } 1996 1997 int mana_attach(struct net_device *ndev) 1998 { 1999 struct mana_port_context *apc = netdev_priv(ndev); 2000 int err; 2001 2002 ASSERT_RTNL(); 2003 2004 err = mana_init_port(ndev); 2005 if (err) 2006 return err; 2007 2008 if (apc->port_st_save) { 2009 err = mana_alloc_queues(ndev); 2010 if (err) { 2011 mana_cleanup_port_context(apc); 2012 return err; 2013 } 2014 } 2015 2016 apc->port_is_up = apc->port_st_save; 2017 2018 /* Ensure port state updated before txq state */ 2019 smp_wmb(); 2020 2021 if (apc->port_is_up) 2022 netif_carrier_on(ndev); 2023 2024 netif_device_attach(ndev); 2025 2026 return 0; 2027 } 2028 2029 static int mana_dealloc_queues(struct net_device *ndev) 2030 { 2031 struct mana_port_context *apc = netdev_priv(ndev); 2032 struct gdma_dev *gd = apc->ac->gdma_dev; 2033 struct mana_txq *txq; 2034 int i, err; 2035 2036 if (apc->port_is_up) 2037 return -EINVAL; 2038 2039 mana_chn_setxdp(apc, NULL); 2040 2041 if (gd->gdma_context->is_pf) 2042 mana_pf_deregister_filter(apc); 2043 2044 /* No packet can be transmitted now since apc->port_is_up is false. 2045 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2046 * a txq because it may not timely see apc->port_is_up being cleared 2047 * to false, but it doesn't matter since mana_start_xmit() drops any 2048 * new packets due to apc->port_is_up being false. 2049 * 2050 * Drain all the in-flight TX packets 2051 */ 2052 for (i = 0; i < apc->num_queues; i++) { 2053 txq = &apc->tx_qp[i].txq; 2054 2055 while (atomic_read(&txq->pending_sends) > 0) 2056 usleep_range(1000, 2000); 2057 } 2058 2059 /* We're 100% sure the queues can no longer be woken up, because 2060 * we're sure now mana_poll_tx_cq() can't be running. 2061 */ 2062 2063 apc->rss_state = TRI_STATE_FALSE; 2064 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2065 if (err) { 2066 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2067 return err; 2068 } 2069 2070 mana_destroy_vport(apc); 2071 2072 return 0; 2073 } 2074 2075 int mana_detach(struct net_device *ndev, bool from_close) 2076 { 2077 struct mana_port_context *apc = netdev_priv(ndev); 2078 int err; 2079 2080 ASSERT_RTNL(); 2081 2082 apc->port_st_save = apc->port_is_up; 2083 apc->port_is_up = false; 2084 2085 /* Ensure port state updated before txq state */ 2086 smp_wmb(); 2087 2088 netif_tx_disable(ndev); 2089 netif_carrier_off(ndev); 2090 2091 if (apc->port_st_save) { 2092 err = mana_dealloc_queues(ndev); 2093 if (err) 2094 return err; 2095 } 2096 2097 if (!from_close) { 2098 netif_device_detach(ndev); 2099 mana_cleanup_port_context(apc); 2100 } 2101 2102 return 0; 2103 } 2104 2105 static int mana_probe_port(struct mana_context *ac, int port_idx, 2106 struct net_device **ndev_storage) 2107 { 2108 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2109 struct mana_port_context *apc; 2110 struct net_device *ndev; 2111 int err; 2112 2113 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2114 gc->max_num_queues); 2115 if (!ndev) 2116 return -ENOMEM; 2117 2118 *ndev_storage = ndev; 2119 2120 apc = netdev_priv(ndev); 2121 apc->ac = ac; 2122 apc->ndev = ndev; 2123 apc->max_queues = gc->max_num_queues; 2124 apc->num_queues = gc->max_num_queues; 2125 apc->port_handle = INVALID_MANA_HANDLE; 2126 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2127 apc->port_idx = port_idx; 2128 2129 mutex_init(&apc->vport_mutex); 2130 apc->vport_use_count = 0; 2131 2132 ndev->netdev_ops = &mana_devops; 2133 ndev->ethtool_ops = &mana_ethtool_ops; 2134 ndev->mtu = ETH_DATA_LEN; 2135 ndev->max_mtu = ndev->mtu; 2136 ndev->min_mtu = ndev->mtu; 2137 ndev->needed_headroom = MANA_HEADROOM; 2138 ndev->dev_port = port_idx; 2139 SET_NETDEV_DEV(ndev, gc->dev); 2140 2141 netif_carrier_off(ndev); 2142 2143 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2144 2145 err = mana_init_port(ndev); 2146 if (err) 2147 goto free_net; 2148 2149 netdev_lockdep_set_classes(ndev); 2150 2151 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2152 ndev->hw_features |= NETIF_F_RXCSUM; 2153 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2154 ndev->hw_features |= NETIF_F_RXHASH; 2155 ndev->features = ndev->hw_features; 2156 ndev->vlan_features = 0; 2157 2158 err = register_netdev(ndev); 2159 if (err) { 2160 netdev_err(ndev, "Unable to register netdev.\n"); 2161 goto reset_apc; 2162 } 2163 2164 return 0; 2165 2166 reset_apc: 2167 kfree(apc->rxqs); 2168 apc->rxqs = NULL; 2169 free_net: 2170 *ndev_storage = NULL; 2171 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2172 free_netdev(ndev); 2173 return err; 2174 } 2175 2176 static void adev_release(struct device *dev) 2177 { 2178 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2179 2180 kfree(madev); 2181 } 2182 2183 static void remove_adev(struct gdma_dev *gd) 2184 { 2185 struct auxiliary_device *adev = gd->adev; 2186 int id = adev->id; 2187 2188 auxiliary_device_delete(adev); 2189 auxiliary_device_uninit(adev); 2190 2191 mana_adev_idx_free(id); 2192 gd->adev = NULL; 2193 } 2194 2195 static int add_adev(struct gdma_dev *gd) 2196 { 2197 struct auxiliary_device *adev; 2198 struct mana_adev *madev; 2199 int ret; 2200 2201 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2202 if (!madev) 2203 return -ENOMEM; 2204 2205 adev = &madev->adev; 2206 ret = mana_adev_idx_alloc(); 2207 if (ret < 0) 2208 goto idx_fail; 2209 adev->id = ret; 2210 2211 adev->name = "rdma"; 2212 adev->dev.parent = gd->gdma_context->dev; 2213 adev->dev.release = adev_release; 2214 madev->mdev = gd; 2215 2216 ret = auxiliary_device_init(adev); 2217 if (ret) 2218 goto init_fail; 2219 2220 ret = auxiliary_device_add(adev); 2221 if (ret) 2222 goto add_fail; 2223 2224 gd->adev = adev; 2225 return 0; 2226 2227 add_fail: 2228 auxiliary_device_uninit(adev); 2229 2230 init_fail: 2231 mana_adev_idx_free(adev->id); 2232 2233 idx_fail: 2234 kfree(madev); 2235 2236 return ret; 2237 } 2238 2239 int mana_probe(struct gdma_dev *gd, bool resuming) 2240 { 2241 struct gdma_context *gc = gd->gdma_context; 2242 struct mana_context *ac = gd->driver_data; 2243 struct device *dev = gc->dev; 2244 u16 num_ports = 0; 2245 int err; 2246 int i; 2247 2248 dev_info(dev, 2249 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2250 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2251 2252 err = mana_gd_register_device(gd); 2253 if (err) 2254 return err; 2255 2256 if (!resuming) { 2257 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 2258 if (!ac) 2259 return -ENOMEM; 2260 2261 ac->gdma_dev = gd; 2262 gd->driver_data = ac; 2263 } 2264 2265 err = mana_create_eq(ac); 2266 if (err) 2267 goto out; 2268 2269 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 2270 MANA_MICRO_VERSION, &num_ports); 2271 if (err) 2272 goto out; 2273 2274 if (!resuming) { 2275 ac->num_ports = num_ports; 2276 } else { 2277 if (ac->num_ports != num_ports) { 2278 dev_err(dev, "The number of vPorts changed: %d->%d\n", 2279 ac->num_ports, num_ports); 2280 err = -EPROTO; 2281 goto out; 2282 } 2283 } 2284 2285 if (ac->num_ports == 0) 2286 dev_err(dev, "Failed to detect any vPort\n"); 2287 2288 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 2289 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 2290 2291 if (!resuming) { 2292 for (i = 0; i < ac->num_ports; i++) { 2293 err = mana_probe_port(ac, i, &ac->ports[i]); 2294 if (err) 2295 break; 2296 } 2297 } else { 2298 for (i = 0; i < ac->num_ports; i++) { 2299 rtnl_lock(); 2300 err = mana_attach(ac->ports[i]); 2301 rtnl_unlock(); 2302 if (err) 2303 break; 2304 } 2305 } 2306 2307 err = add_adev(gd); 2308 out: 2309 if (err) 2310 mana_remove(gd, false); 2311 2312 return err; 2313 } 2314 2315 void mana_remove(struct gdma_dev *gd, bool suspending) 2316 { 2317 struct gdma_context *gc = gd->gdma_context; 2318 struct mana_context *ac = gd->driver_data; 2319 struct device *dev = gc->dev; 2320 struct net_device *ndev; 2321 int err; 2322 int i; 2323 2324 /* adev currently doesn't support suspending, always remove it */ 2325 if (gd->adev) 2326 remove_adev(gd); 2327 2328 for (i = 0; i < ac->num_ports; i++) { 2329 ndev = ac->ports[i]; 2330 if (!ndev) { 2331 if (i == 0) 2332 dev_err(dev, "No net device to remove\n"); 2333 goto out; 2334 } 2335 2336 /* All cleanup actions should stay after rtnl_lock(), otherwise 2337 * other functions may access partially cleaned up data. 2338 */ 2339 rtnl_lock(); 2340 2341 err = mana_detach(ndev, false); 2342 if (err) 2343 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 2344 i, err); 2345 2346 if (suspending) { 2347 /* No need to unregister the ndev. */ 2348 rtnl_unlock(); 2349 continue; 2350 } 2351 2352 unregister_netdevice(ndev); 2353 2354 rtnl_unlock(); 2355 2356 free_netdev(ndev); 2357 } 2358 2359 mana_destroy_eq(ac); 2360 out: 2361 mana_gd_deregister_device(gd); 2362 2363 if (suspending) 2364 return; 2365 2366 gd->driver_data = NULL; 2367 gd->gdma_context = NULL; 2368 kfree(ac); 2369 } 2370