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 u16 ihs; 160 161 if (unlikely(!apc->port_is_up)) 162 goto tx_drop; 163 164 if (skb_cow_head(skb, MANA_HEADROOM)) 165 goto tx_drop_count; 166 167 txq = &apc->tx_qp[txq_idx].txq; 168 gdma_sq = txq->gdma_sq; 169 cq = &apc->tx_qp[txq_idx].tx_cq; 170 tx_stats = &txq->stats; 171 172 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id; 173 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame; 174 175 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) { 176 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset; 177 pkt_fmt = MANA_LONG_PKT_FMT; 178 } else { 179 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; 180 } 181 182 if (skb_vlan_tag_present(skb)) { 183 pkt_fmt = MANA_LONG_PKT_FMT; 184 pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1; 185 pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb); 186 pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb); 187 pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb); 188 } 189 190 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt; 191 192 if (pkt_fmt == MANA_SHORT_PKT_FMT) { 193 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob); 194 u64_stats_update_begin(&tx_stats->syncp); 195 tx_stats->short_pkt_fmt++; 196 u64_stats_update_end(&tx_stats->syncp); 197 } else { 198 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob); 199 u64_stats_update_begin(&tx_stats->syncp); 200 tx_stats->long_pkt_fmt++; 201 u64_stats_update_end(&tx_stats->syncp); 202 } 203 204 pkg.wqe_req.inline_oob_data = &pkg.tx_oob; 205 pkg.wqe_req.flags = 0; 206 pkg.wqe_req.client_data_unit = 0; 207 208 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; 209 WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES); 210 211 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { 212 pkg.wqe_req.sgl = pkg.sgl_array; 213 } else { 214 pkg.sgl_ptr = kmalloc_array(pkg.wqe_req.num_sge, 215 sizeof(struct gdma_sge), 216 GFP_ATOMIC); 217 if (!pkg.sgl_ptr) 218 goto tx_drop_count; 219 220 pkg.wqe_req.sgl = pkg.sgl_ptr; 221 } 222 223 if (skb->protocol == htons(ETH_P_IP)) 224 ipv4 = true; 225 else if (skb->protocol == htons(ETH_P_IPV6)) 226 ipv6 = true; 227 228 if (skb_is_gso(skb)) { 229 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 230 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 231 232 pkg.tx_oob.s_oob.comp_iphdr_csum = 1; 233 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 234 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 235 236 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size; 237 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0; 238 if (ipv4) { 239 ip_hdr(skb)->tot_len = 0; 240 ip_hdr(skb)->check = 0; 241 tcp_hdr(skb)->check = 242 ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 243 ip_hdr(skb)->daddr, 0, 244 IPPROTO_TCP, 0); 245 } else { 246 ipv6_hdr(skb)->payload_len = 0; 247 tcp_hdr(skb)->check = 248 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 249 &ipv6_hdr(skb)->daddr, 0, 250 IPPROTO_TCP, 0); 251 } 252 253 if (skb->encapsulation) { 254 ihs = skb_inner_tcp_all_headers(skb); 255 u64_stats_update_begin(&tx_stats->syncp); 256 tx_stats->tso_inner_packets++; 257 tx_stats->tso_inner_bytes += skb->len - ihs; 258 u64_stats_update_end(&tx_stats->syncp); 259 } else { 260 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 261 ihs = skb_transport_offset(skb) + sizeof(struct udphdr); 262 } else { 263 ihs = skb_tcp_all_headers(skb); 264 if (ipv6_has_hopopt_jumbo(skb)) 265 ihs -= sizeof(struct hop_jumbo_hdr); 266 } 267 268 u64_stats_update_begin(&tx_stats->syncp); 269 tx_stats->tso_packets++; 270 tx_stats->tso_bytes += skb->len - ihs; 271 u64_stats_update_end(&tx_stats->syncp); 272 } 273 274 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 275 csum_type = mana_checksum_info(skb); 276 277 u64_stats_update_begin(&tx_stats->syncp); 278 tx_stats->csum_partial++; 279 u64_stats_update_end(&tx_stats->syncp); 280 281 if (csum_type == IPPROTO_TCP) { 282 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 283 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 284 285 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 286 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 287 288 } else if (csum_type == IPPROTO_UDP) { 289 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 290 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 291 292 pkg.tx_oob.s_oob.comp_udp_csum = 1; 293 } else { 294 /* Can't do offload of this type of checksum */ 295 if (skb_checksum_help(skb)) 296 goto free_sgl_ptr; 297 } 298 } 299 300 if (mana_map_skb(skb, apc, &pkg)) { 301 u64_stats_update_begin(&tx_stats->syncp); 302 tx_stats->mana_map_err++; 303 u64_stats_update_end(&tx_stats->syncp); 304 goto free_sgl_ptr; 305 } 306 307 skb_queue_tail(&txq->pending_skbs, skb); 308 309 len = skb->len; 310 net_txq = netdev_get_tx_queue(ndev, txq_idx); 311 312 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req, 313 (struct gdma_posted_wqe_info *)skb->cb); 314 if (!mana_can_tx(gdma_sq)) { 315 netif_tx_stop_queue(net_txq); 316 apc->eth_stats.stop_queue++; 317 } 318 319 if (err) { 320 (void)skb_dequeue_tail(&txq->pending_skbs); 321 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err); 322 err = NETDEV_TX_BUSY; 323 goto tx_busy; 324 } 325 326 err = NETDEV_TX_OK; 327 atomic_inc(&txq->pending_sends); 328 329 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq); 330 331 /* skb may be freed after mana_gd_post_work_request. Do not use it. */ 332 skb = NULL; 333 334 tx_stats = &txq->stats; 335 u64_stats_update_begin(&tx_stats->syncp); 336 tx_stats->packets++; 337 tx_stats->bytes += len; 338 u64_stats_update_end(&tx_stats->syncp); 339 340 tx_busy: 341 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) { 342 netif_tx_wake_queue(net_txq); 343 apc->eth_stats.wake_queue++; 344 } 345 346 kfree(pkg.sgl_ptr); 347 return err; 348 349 free_sgl_ptr: 350 kfree(pkg.sgl_ptr); 351 tx_drop_count: 352 ndev->stats.tx_dropped++; 353 tx_drop: 354 dev_kfree_skb_any(skb); 355 return NETDEV_TX_OK; 356 } 357 358 static void mana_get_stats64(struct net_device *ndev, 359 struct rtnl_link_stats64 *st) 360 { 361 struct mana_port_context *apc = netdev_priv(ndev); 362 unsigned int num_queues = apc->num_queues; 363 struct mana_stats_rx *rx_stats; 364 struct mana_stats_tx *tx_stats; 365 unsigned int start; 366 u64 packets, bytes; 367 int q; 368 369 if (!apc->port_is_up) 370 return; 371 372 netdev_stats_to_stats64(st, &ndev->stats); 373 374 for (q = 0; q < num_queues; q++) { 375 rx_stats = &apc->rxqs[q]->stats; 376 377 do { 378 start = u64_stats_fetch_begin(&rx_stats->syncp); 379 packets = rx_stats->packets; 380 bytes = rx_stats->bytes; 381 } while (u64_stats_fetch_retry(&rx_stats->syncp, start)); 382 383 st->rx_packets += packets; 384 st->rx_bytes += bytes; 385 } 386 387 for (q = 0; q < num_queues; q++) { 388 tx_stats = &apc->tx_qp[q].txq.stats; 389 390 do { 391 start = u64_stats_fetch_begin(&tx_stats->syncp); 392 packets = tx_stats->packets; 393 bytes = tx_stats->bytes; 394 } while (u64_stats_fetch_retry(&tx_stats->syncp, start)); 395 396 st->tx_packets += packets; 397 st->tx_bytes += bytes; 398 } 399 } 400 401 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb, 402 int old_q) 403 { 404 struct mana_port_context *apc = netdev_priv(ndev); 405 u32 hash = skb_get_hash(skb); 406 struct sock *sk = skb->sk; 407 int txq; 408 409 txq = apc->indir_table[hash & MANA_INDIRECT_TABLE_MASK]; 410 411 if (txq != old_q && sk && sk_fullsock(sk) && 412 rcu_access_pointer(sk->sk_dst_cache)) 413 sk_tx_queue_set(sk, txq); 414 415 return txq; 416 } 417 418 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb, 419 struct net_device *sb_dev) 420 { 421 int txq; 422 423 if (ndev->real_num_tx_queues == 1) 424 return 0; 425 426 txq = sk_tx_queue_get(skb->sk); 427 428 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) { 429 if (skb_rx_queue_recorded(skb)) 430 txq = skb_get_rx_queue(skb); 431 else 432 txq = mana_get_tx_queue(ndev, skb, txq); 433 } 434 435 return txq; 436 } 437 438 /* Release pre-allocated RX buffers */ 439 static void mana_pre_dealloc_rxbufs(struct mana_port_context *mpc) 440 { 441 struct device *dev; 442 int i; 443 444 dev = mpc->ac->gdma_dev->gdma_context->dev; 445 446 if (!mpc->rxbufs_pre) 447 goto out1; 448 449 if (!mpc->das_pre) 450 goto out2; 451 452 while (mpc->rxbpre_total) { 453 i = --mpc->rxbpre_total; 454 dma_unmap_single(dev, mpc->das_pre[i], mpc->rxbpre_datasize, 455 DMA_FROM_DEVICE); 456 put_page(virt_to_head_page(mpc->rxbufs_pre[i])); 457 } 458 459 kfree(mpc->das_pre); 460 mpc->das_pre = NULL; 461 462 out2: 463 kfree(mpc->rxbufs_pre); 464 mpc->rxbufs_pre = NULL; 465 466 out1: 467 mpc->rxbpre_datasize = 0; 468 mpc->rxbpre_alloc_size = 0; 469 mpc->rxbpre_headroom = 0; 470 } 471 472 /* Get a buffer from the pre-allocated RX buffers */ 473 static void *mana_get_rxbuf_pre(struct mana_rxq *rxq, dma_addr_t *da) 474 { 475 struct net_device *ndev = rxq->ndev; 476 struct mana_port_context *mpc; 477 void *va; 478 479 mpc = netdev_priv(ndev); 480 481 if (!mpc->rxbufs_pre || !mpc->das_pre || !mpc->rxbpre_total) { 482 netdev_err(ndev, "No RX pre-allocated bufs\n"); 483 return NULL; 484 } 485 486 /* Check sizes to catch unexpected coding error */ 487 if (mpc->rxbpre_datasize != rxq->datasize) { 488 netdev_err(ndev, "rxbpre_datasize mismatch: %u: %u\n", 489 mpc->rxbpre_datasize, rxq->datasize); 490 return NULL; 491 } 492 493 if (mpc->rxbpre_alloc_size != rxq->alloc_size) { 494 netdev_err(ndev, "rxbpre_alloc_size mismatch: %u: %u\n", 495 mpc->rxbpre_alloc_size, rxq->alloc_size); 496 return NULL; 497 } 498 499 if (mpc->rxbpre_headroom != rxq->headroom) { 500 netdev_err(ndev, "rxbpre_headroom mismatch: %u: %u\n", 501 mpc->rxbpre_headroom, rxq->headroom); 502 return NULL; 503 } 504 505 mpc->rxbpre_total--; 506 507 *da = mpc->das_pre[mpc->rxbpre_total]; 508 va = mpc->rxbufs_pre[mpc->rxbpre_total]; 509 mpc->rxbufs_pre[mpc->rxbpre_total] = NULL; 510 511 /* Deallocate the array after all buffers are gone */ 512 if (!mpc->rxbpre_total) 513 mana_pre_dealloc_rxbufs(mpc); 514 515 return va; 516 } 517 518 /* Get RX buffer's data size, alloc size, XDP headroom based on MTU */ 519 static void mana_get_rxbuf_cfg(int mtu, u32 *datasize, u32 *alloc_size, 520 u32 *headroom) 521 { 522 if (mtu > MANA_XDP_MTU_MAX) 523 *headroom = 0; /* no support for XDP */ 524 else 525 *headroom = XDP_PACKET_HEADROOM; 526 527 *alloc_size = mtu + MANA_RXBUF_PAD + *headroom; 528 529 *datasize = ALIGN(mtu + ETH_HLEN, MANA_RX_DATA_ALIGN); 530 } 531 532 static int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu) 533 { 534 struct device *dev; 535 struct page *page; 536 dma_addr_t da; 537 int num_rxb; 538 void *va; 539 int i; 540 541 mana_get_rxbuf_cfg(new_mtu, &mpc->rxbpre_datasize, 542 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom); 543 544 dev = mpc->ac->gdma_dev->gdma_context->dev; 545 546 num_rxb = mpc->num_queues * RX_BUFFERS_PER_QUEUE; 547 548 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n"); 549 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL); 550 if (!mpc->rxbufs_pre) 551 goto error; 552 553 mpc->das_pre = kmalloc_array(num_rxb, sizeof(dma_addr_t), GFP_KERNEL); 554 if (!mpc->das_pre) 555 goto error; 556 557 mpc->rxbpre_total = 0; 558 559 for (i = 0; i < num_rxb; i++) { 560 if (mpc->rxbpre_alloc_size > PAGE_SIZE) { 561 va = netdev_alloc_frag(mpc->rxbpre_alloc_size); 562 if (!va) 563 goto error; 564 565 page = virt_to_head_page(va); 566 /* Check if the frag falls back to single page */ 567 if (compound_order(page) < 568 get_order(mpc->rxbpre_alloc_size)) { 569 put_page(page); 570 goto error; 571 } 572 } else { 573 page = dev_alloc_page(); 574 if (!page) 575 goto error; 576 577 va = page_to_virt(page); 578 } 579 580 da = dma_map_single(dev, va + mpc->rxbpre_headroom, 581 mpc->rxbpre_datasize, DMA_FROM_DEVICE); 582 if (dma_mapping_error(dev, da)) { 583 put_page(virt_to_head_page(va)); 584 goto error; 585 } 586 587 mpc->rxbufs_pre[i] = va; 588 mpc->das_pre[i] = da; 589 mpc->rxbpre_total = i + 1; 590 } 591 592 return 0; 593 594 error: 595 mana_pre_dealloc_rxbufs(mpc); 596 return -ENOMEM; 597 } 598 599 static int mana_change_mtu(struct net_device *ndev, int new_mtu) 600 { 601 struct mana_port_context *mpc = netdev_priv(ndev); 602 unsigned int old_mtu = ndev->mtu; 603 int err; 604 605 /* Pre-allocate buffers to prevent failure in mana_attach later */ 606 err = mana_pre_alloc_rxbufs(mpc, new_mtu); 607 if (err) { 608 netdev_err(ndev, "Insufficient memory for new MTU\n"); 609 return err; 610 } 611 612 err = mana_detach(ndev, false); 613 if (err) { 614 netdev_err(ndev, "mana_detach failed: %d\n", err); 615 goto out; 616 } 617 618 ndev->mtu = new_mtu; 619 620 err = mana_attach(ndev); 621 if (err) { 622 netdev_err(ndev, "mana_attach failed: %d\n", err); 623 ndev->mtu = old_mtu; 624 } 625 626 out: 627 mana_pre_dealloc_rxbufs(mpc); 628 return err; 629 } 630 631 static const struct net_device_ops mana_devops = { 632 .ndo_open = mana_open, 633 .ndo_stop = mana_close, 634 .ndo_select_queue = mana_select_queue, 635 .ndo_start_xmit = mana_start_xmit, 636 .ndo_validate_addr = eth_validate_addr, 637 .ndo_get_stats64 = mana_get_stats64, 638 .ndo_bpf = mana_bpf, 639 .ndo_xdp_xmit = mana_xdp_xmit, 640 .ndo_change_mtu = mana_change_mtu, 641 }; 642 643 static void mana_cleanup_port_context(struct mana_port_context *apc) 644 { 645 kfree(apc->rxqs); 646 apc->rxqs = NULL; 647 } 648 649 static int mana_init_port_context(struct mana_port_context *apc) 650 { 651 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 652 GFP_KERNEL); 653 654 return !apc->rxqs ? -ENOMEM : 0; 655 } 656 657 static int mana_send_request(struct mana_context *ac, void *in_buf, 658 u32 in_len, void *out_buf, u32 out_len) 659 { 660 struct gdma_context *gc = ac->gdma_dev->gdma_context; 661 struct gdma_resp_hdr *resp = out_buf; 662 struct gdma_req_hdr *req = in_buf; 663 struct device *dev = gc->dev; 664 static atomic_t activity_id; 665 int err; 666 667 req->dev_id = gc->mana.dev_id; 668 req->activity_id = atomic_inc_return(&activity_id); 669 670 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 671 out_buf); 672 if (err || resp->status) { 673 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 674 err, resp->status); 675 return err ? err : -EPROTO; 676 } 677 678 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 679 req->activity_id != resp->activity_id) { 680 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 681 req->dev_id.as_uint32, resp->dev_id.as_uint32, 682 req->activity_id, resp->activity_id); 683 return -EPROTO; 684 } 685 686 return 0; 687 } 688 689 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 690 const enum mana_command_code expected_code, 691 const u32 min_size) 692 { 693 if (resp_hdr->response.msg_type != expected_code) 694 return -EPROTO; 695 696 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 697 return -EPROTO; 698 699 if (resp_hdr->response.msg_size < min_size) 700 return -EPROTO; 701 702 return 0; 703 } 704 705 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 706 { 707 struct mana_register_hw_vport_resp resp = {}; 708 struct mana_register_hw_vport_req req = {}; 709 int err; 710 711 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 712 sizeof(req), sizeof(resp)); 713 req.attached_gfid = 1; 714 req.is_pf_default_vport = 1; 715 req.allow_all_ether_types = 1; 716 717 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 718 sizeof(resp)); 719 if (err) { 720 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 721 return err; 722 } 723 724 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 725 sizeof(resp)); 726 if (err || resp.hdr.status) { 727 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 728 err, resp.hdr.status); 729 return err ? err : -EPROTO; 730 } 731 732 apc->port_handle = resp.hw_vport_handle; 733 return 0; 734 } 735 736 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 737 { 738 struct mana_deregister_hw_vport_resp resp = {}; 739 struct mana_deregister_hw_vport_req req = {}; 740 int err; 741 742 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 743 sizeof(req), sizeof(resp)); 744 req.hw_vport_handle = apc->port_handle; 745 746 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 747 sizeof(resp)); 748 if (err) { 749 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 750 err); 751 return; 752 } 753 754 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 755 sizeof(resp)); 756 if (err || resp.hdr.status) 757 netdev_err(apc->ndev, 758 "Failed to deregister hw vPort: %d, 0x%x\n", 759 err, resp.hdr.status); 760 } 761 762 static int mana_pf_register_filter(struct mana_port_context *apc) 763 { 764 struct mana_register_filter_resp resp = {}; 765 struct mana_register_filter_req req = {}; 766 int err; 767 768 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 769 sizeof(req), sizeof(resp)); 770 req.vport = apc->port_handle; 771 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 772 773 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 774 sizeof(resp)); 775 if (err) { 776 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 777 return err; 778 } 779 780 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 781 sizeof(resp)); 782 if (err || resp.hdr.status) { 783 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 784 err, resp.hdr.status); 785 return err ? err : -EPROTO; 786 } 787 788 apc->pf_filter_handle = resp.filter_handle; 789 return 0; 790 } 791 792 static void mana_pf_deregister_filter(struct mana_port_context *apc) 793 { 794 struct mana_deregister_filter_resp resp = {}; 795 struct mana_deregister_filter_req req = {}; 796 int err; 797 798 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 799 sizeof(req), sizeof(resp)); 800 req.filter_handle = apc->pf_filter_handle; 801 802 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 803 sizeof(resp)); 804 if (err) { 805 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 806 err); 807 return; 808 } 809 810 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 811 sizeof(resp)); 812 if (err || resp.hdr.status) 813 netdev_err(apc->ndev, 814 "Failed to deregister filter: %d, 0x%x\n", 815 err, resp.hdr.status); 816 } 817 818 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 819 u32 proto_minor_ver, u32 proto_micro_ver, 820 u16 *max_num_vports) 821 { 822 struct gdma_context *gc = ac->gdma_dev->gdma_context; 823 struct mana_query_device_cfg_resp resp = {}; 824 struct mana_query_device_cfg_req req = {}; 825 struct device *dev = gc->dev; 826 int err = 0; 827 828 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 829 sizeof(req), sizeof(resp)); 830 831 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 832 833 req.proto_major_ver = proto_major_ver; 834 req.proto_minor_ver = proto_minor_ver; 835 req.proto_micro_ver = proto_micro_ver; 836 837 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 838 if (err) { 839 dev_err(dev, "Failed to query config: %d", err); 840 return err; 841 } 842 843 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 844 sizeof(resp)); 845 if (err || resp.hdr.status) { 846 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 847 resp.hdr.status); 848 if (!err) 849 err = -EPROTO; 850 return err; 851 } 852 853 *max_num_vports = resp.max_num_vports; 854 855 if (resp.hdr.response.msg_version == GDMA_MESSAGE_V2) 856 gc->adapter_mtu = resp.adapter_mtu; 857 else 858 gc->adapter_mtu = ETH_FRAME_LEN; 859 860 return 0; 861 } 862 863 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 864 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 865 { 866 struct mana_query_vport_cfg_resp resp = {}; 867 struct mana_query_vport_cfg_req req = {}; 868 int err; 869 870 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 871 sizeof(req), sizeof(resp)); 872 873 req.vport_index = vport_index; 874 875 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 876 sizeof(resp)); 877 if (err) 878 return err; 879 880 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 881 sizeof(resp)); 882 if (err) 883 return err; 884 885 if (resp.hdr.status) 886 return -EPROTO; 887 888 *max_sq = resp.max_num_sq; 889 *max_rq = resp.max_num_rq; 890 *num_indir_entry = resp.num_indirection_ent; 891 892 apc->port_handle = resp.vport; 893 ether_addr_copy(apc->mac_addr, resp.mac_addr); 894 895 return 0; 896 } 897 898 void mana_uncfg_vport(struct mana_port_context *apc) 899 { 900 mutex_lock(&apc->vport_mutex); 901 apc->vport_use_count--; 902 WARN_ON(apc->vport_use_count < 0); 903 mutex_unlock(&apc->vport_mutex); 904 } 905 EXPORT_SYMBOL_NS(mana_uncfg_vport, NET_MANA); 906 907 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 908 u32 doorbell_pg_id) 909 { 910 struct mana_config_vport_resp resp = {}; 911 struct mana_config_vport_req req = {}; 912 int err; 913 914 /* This function is used to program the Ethernet port in the hardware 915 * table. It can be called from the Ethernet driver or the RDMA driver. 916 * 917 * For Ethernet usage, the hardware supports only one active user on a 918 * physical port. The driver checks on the port usage before programming 919 * the hardware when creating the RAW QP (RDMA driver) or exposing the 920 * device to kernel NET layer (Ethernet driver). 921 * 922 * Because the RDMA driver doesn't know in advance which QP type the 923 * user will create, it exposes the device with all its ports. The user 924 * may not be able to create RAW QP on a port if this port is already 925 * in used by the Ethernet driver from the kernel. 926 * 927 * This physical port limitation only applies to the RAW QP. For RC QP, 928 * the hardware doesn't have this limitation. The user can create RC 929 * QPs on a physical port up to the hardware limits independent of the 930 * Ethernet usage on the same port. 931 */ 932 mutex_lock(&apc->vport_mutex); 933 if (apc->vport_use_count > 0) { 934 mutex_unlock(&apc->vport_mutex); 935 return -EBUSY; 936 } 937 apc->vport_use_count++; 938 mutex_unlock(&apc->vport_mutex); 939 940 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 941 sizeof(req), sizeof(resp)); 942 req.vport = apc->port_handle; 943 req.pdid = protection_dom_id; 944 req.doorbell_pageid = doorbell_pg_id; 945 946 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 947 sizeof(resp)); 948 if (err) { 949 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 950 goto out; 951 } 952 953 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 954 sizeof(resp)); 955 if (err || resp.hdr.status) { 956 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 957 err, resp.hdr.status); 958 if (!err) 959 err = -EPROTO; 960 961 goto out; 962 } 963 964 apc->tx_shortform_allowed = resp.short_form_allowed; 965 apc->tx_vp_offset = resp.tx_vport_offset; 966 967 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 968 apc->port_handle, protection_dom_id, doorbell_pg_id); 969 out: 970 if (err) 971 mana_uncfg_vport(apc); 972 973 return err; 974 } 975 EXPORT_SYMBOL_NS(mana_cfg_vport, NET_MANA); 976 977 static int mana_cfg_vport_steering(struct mana_port_context *apc, 978 enum TRI_STATE rx, 979 bool update_default_rxobj, bool update_key, 980 bool update_tab) 981 { 982 u16 num_entries = MANA_INDIRECT_TABLE_SIZE; 983 struct mana_cfg_rx_steer_req_v2 *req; 984 struct mana_cfg_rx_steer_resp resp = {}; 985 struct net_device *ndev = apc->ndev; 986 mana_handle_t *req_indir_tab; 987 u32 req_buf_size; 988 int err; 989 990 req_buf_size = sizeof(*req) + sizeof(mana_handle_t) * num_entries; 991 req = kzalloc(req_buf_size, GFP_KERNEL); 992 if (!req) 993 return -ENOMEM; 994 995 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 996 sizeof(resp)); 997 998 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 999 1000 req->vport = apc->port_handle; 1001 req->num_indir_entries = num_entries; 1002 req->indir_tab_offset = sizeof(*req); 1003 req->rx_enable = rx; 1004 req->rss_enable = apc->rss_state; 1005 req->update_default_rxobj = update_default_rxobj; 1006 req->update_hashkey = update_key; 1007 req->update_indir_tab = update_tab; 1008 req->default_rxobj = apc->default_rxobj; 1009 req->cqe_coalescing_enable = 0; 1010 1011 if (update_key) 1012 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1013 1014 if (update_tab) { 1015 req_indir_tab = (mana_handle_t *)(req + 1); 1016 memcpy(req_indir_tab, apc->rxobj_table, 1017 req->num_indir_entries * sizeof(mana_handle_t)); 1018 } 1019 1020 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1021 sizeof(resp)); 1022 if (err) { 1023 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1024 goto out; 1025 } 1026 1027 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1028 sizeof(resp)); 1029 if (err) { 1030 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1031 goto out; 1032 } 1033 1034 if (resp.hdr.status) { 1035 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1036 resp.hdr.status); 1037 err = -EPROTO; 1038 } 1039 1040 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1041 apc->port_handle, num_entries); 1042 out: 1043 kfree(req); 1044 return err; 1045 } 1046 1047 int mana_create_wq_obj(struct mana_port_context *apc, 1048 mana_handle_t vport, 1049 u32 wq_type, struct mana_obj_spec *wq_spec, 1050 struct mana_obj_spec *cq_spec, 1051 mana_handle_t *wq_obj) 1052 { 1053 struct mana_create_wqobj_resp resp = {}; 1054 struct mana_create_wqobj_req req = {}; 1055 struct net_device *ndev = apc->ndev; 1056 int err; 1057 1058 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1059 sizeof(req), sizeof(resp)); 1060 req.vport = vport; 1061 req.wq_type = wq_type; 1062 req.wq_gdma_region = wq_spec->gdma_region; 1063 req.cq_gdma_region = cq_spec->gdma_region; 1064 req.wq_size = wq_spec->queue_size; 1065 req.cq_size = cq_spec->queue_size; 1066 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1067 req.cq_parent_qid = cq_spec->attached_eq; 1068 1069 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1070 sizeof(resp)); 1071 if (err) { 1072 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1073 goto out; 1074 } 1075 1076 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1077 sizeof(resp)); 1078 if (err || resp.hdr.status) { 1079 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1080 resp.hdr.status); 1081 if (!err) 1082 err = -EPROTO; 1083 goto out; 1084 } 1085 1086 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1087 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1088 err = -EPROTO; 1089 goto out; 1090 } 1091 1092 *wq_obj = resp.wq_obj; 1093 wq_spec->queue_index = resp.wq_id; 1094 cq_spec->queue_index = resp.cq_id; 1095 1096 return 0; 1097 out: 1098 return err; 1099 } 1100 EXPORT_SYMBOL_NS(mana_create_wq_obj, NET_MANA); 1101 1102 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1103 mana_handle_t wq_obj) 1104 { 1105 struct mana_destroy_wqobj_resp resp = {}; 1106 struct mana_destroy_wqobj_req req = {}; 1107 struct net_device *ndev = apc->ndev; 1108 int err; 1109 1110 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1111 sizeof(req), sizeof(resp)); 1112 req.wq_type = wq_type; 1113 req.wq_obj_handle = wq_obj; 1114 1115 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1116 sizeof(resp)); 1117 if (err) { 1118 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1119 return; 1120 } 1121 1122 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1123 sizeof(resp)); 1124 if (err || resp.hdr.status) 1125 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1126 resp.hdr.status); 1127 } 1128 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, NET_MANA); 1129 1130 static void mana_destroy_eq(struct mana_context *ac) 1131 { 1132 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1133 struct gdma_queue *eq; 1134 int i; 1135 1136 if (!ac->eqs) 1137 return; 1138 1139 for (i = 0; i < gc->max_num_queues; i++) { 1140 eq = ac->eqs[i].eq; 1141 if (!eq) 1142 continue; 1143 1144 mana_gd_destroy_queue(gc, eq); 1145 } 1146 1147 kfree(ac->eqs); 1148 ac->eqs = NULL; 1149 } 1150 1151 static int mana_create_eq(struct mana_context *ac) 1152 { 1153 struct gdma_dev *gd = ac->gdma_dev; 1154 struct gdma_context *gc = gd->gdma_context; 1155 struct gdma_queue_spec spec = {}; 1156 int err; 1157 int i; 1158 1159 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq), 1160 GFP_KERNEL); 1161 if (!ac->eqs) 1162 return -ENOMEM; 1163 1164 spec.type = GDMA_EQ; 1165 spec.monitor_avl_buf = false; 1166 spec.queue_size = EQ_SIZE; 1167 spec.eq.callback = NULL; 1168 spec.eq.context = ac->eqs; 1169 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1170 1171 for (i = 0; i < gc->max_num_queues; i++) { 1172 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1173 if (err) 1174 goto out; 1175 } 1176 1177 return 0; 1178 out: 1179 mana_destroy_eq(ac); 1180 return err; 1181 } 1182 1183 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1184 { 1185 struct mana_fence_rq_resp resp = {}; 1186 struct mana_fence_rq_req req = {}; 1187 int err; 1188 1189 init_completion(&rxq->fence_event); 1190 1191 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1192 sizeof(req), sizeof(resp)); 1193 req.wq_obj_handle = rxq->rxobj; 1194 1195 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1196 sizeof(resp)); 1197 if (err) { 1198 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1199 rxq->rxq_idx, err); 1200 return err; 1201 } 1202 1203 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1204 if (err || resp.hdr.status) { 1205 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1206 rxq->rxq_idx, err, resp.hdr.status); 1207 if (!err) 1208 err = -EPROTO; 1209 1210 return err; 1211 } 1212 1213 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1214 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1215 rxq->rxq_idx); 1216 return -ETIMEDOUT; 1217 } 1218 1219 return 0; 1220 } 1221 1222 static void mana_fence_rqs(struct mana_port_context *apc) 1223 { 1224 unsigned int rxq_idx; 1225 struct mana_rxq *rxq; 1226 int err; 1227 1228 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1229 rxq = apc->rxqs[rxq_idx]; 1230 err = mana_fence_rq(apc, rxq); 1231 1232 /* In case of any error, use sleep instead. */ 1233 if (err) 1234 msleep(100); 1235 } 1236 } 1237 1238 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1239 { 1240 u32 used_space_old; 1241 u32 used_space_new; 1242 1243 used_space_old = wq->head - wq->tail; 1244 used_space_new = wq->head - (wq->tail + num_units); 1245 1246 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1247 return -ERANGE; 1248 1249 wq->tail += num_units; 1250 return 0; 1251 } 1252 1253 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1254 { 1255 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1256 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1257 struct device *dev = gc->dev; 1258 int i; 1259 1260 dma_unmap_single(dev, ash->dma_handle[0], ash->size[0], DMA_TO_DEVICE); 1261 1262 for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) 1263 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1264 DMA_TO_DEVICE); 1265 } 1266 1267 static void mana_poll_tx_cq(struct mana_cq *cq) 1268 { 1269 struct gdma_comp *completions = cq->gdma_comp_buf; 1270 struct gdma_posted_wqe_info *wqe_info; 1271 unsigned int pkt_transmitted = 0; 1272 unsigned int wqe_unit_cnt = 0; 1273 struct mana_txq *txq = cq->txq; 1274 struct mana_port_context *apc; 1275 struct netdev_queue *net_txq; 1276 struct gdma_queue *gdma_wq; 1277 unsigned int avail_space; 1278 struct net_device *ndev; 1279 struct sk_buff *skb; 1280 bool txq_stopped; 1281 int comp_read; 1282 int i; 1283 1284 ndev = txq->ndev; 1285 apc = netdev_priv(ndev); 1286 1287 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1288 CQE_POLLING_BUFFER); 1289 1290 if (comp_read < 1) 1291 return; 1292 1293 for (i = 0; i < comp_read; i++) { 1294 struct mana_tx_comp_oob *cqe_oob; 1295 1296 if (WARN_ON_ONCE(!completions[i].is_sq)) 1297 return; 1298 1299 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1300 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1301 MANA_CQE_COMPLETION)) 1302 return; 1303 1304 switch (cqe_oob->cqe_hdr.cqe_type) { 1305 case CQE_TX_OKAY: 1306 break; 1307 1308 case CQE_TX_SA_DROP: 1309 case CQE_TX_MTU_DROP: 1310 case CQE_TX_INVALID_OOB: 1311 case CQE_TX_INVALID_ETH_TYPE: 1312 case CQE_TX_HDR_PROCESSING_ERROR: 1313 case CQE_TX_VF_DISABLED: 1314 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1315 case CQE_TX_VPORT_DISABLED: 1316 case CQE_TX_VLAN_TAGGING_VIOLATION: 1317 WARN_ONCE(1, "TX: CQE error %d: ignored.\n", 1318 cqe_oob->cqe_hdr.cqe_type); 1319 apc->eth_stats.tx_cqe_err++; 1320 break; 1321 1322 default: 1323 /* If the CQE type is unexpected, log an error, assert, 1324 * and go through the error path. 1325 */ 1326 WARN_ONCE(1, "TX: Unexpected CQE type %d: HW BUG?\n", 1327 cqe_oob->cqe_hdr.cqe_type); 1328 apc->eth_stats.tx_cqe_unknown_type++; 1329 return; 1330 } 1331 1332 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1333 return; 1334 1335 skb = skb_dequeue(&txq->pending_skbs); 1336 if (WARN_ON_ONCE(!skb)) 1337 return; 1338 1339 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1340 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1341 1342 mana_unmap_skb(skb, apc); 1343 1344 napi_consume_skb(skb, cq->budget); 1345 1346 pkt_transmitted++; 1347 } 1348 1349 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1350 return; 1351 1352 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1353 1354 gdma_wq = txq->gdma_sq; 1355 avail_space = mana_gd_wq_avail_space(gdma_wq); 1356 1357 /* Ensure tail updated before checking q stop */ 1358 smp_mb(); 1359 1360 net_txq = txq->net_txq; 1361 txq_stopped = netif_tx_queue_stopped(net_txq); 1362 1363 /* Ensure checking txq_stopped before apc->port_is_up. */ 1364 smp_rmb(); 1365 1366 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1367 netif_tx_wake_queue(net_txq); 1368 apc->eth_stats.wake_queue++; 1369 } 1370 1371 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1372 WARN_ON_ONCE(1); 1373 1374 cq->work_done = pkt_transmitted; 1375 } 1376 1377 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1378 { 1379 struct mana_recv_buf_oob *recv_buf_oob; 1380 u32 curr_index; 1381 int err; 1382 1383 curr_index = rxq->buf_index++; 1384 if (rxq->buf_index == rxq->num_rx_buf) 1385 rxq->buf_index = 0; 1386 1387 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1388 1389 err = mana_gd_post_and_ring(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1390 &recv_buf_oob->wqe_inf); 1391 if (WARN_ON_ONCE(err)) 1392 return; 1393 1394 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1395 } 1396 1397 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1398 uint pkt_len, struct xdp_buff *xdp) 1399 { 1400 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1401 1402 if (!skb) 1403 return NULL; 1404 1405 if (xdp->data_hard_start) { 1406 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1407 skb_put(skb, xdp->data_end - xdp->data); 1408 return skb; 1409 } 1410 1411 skb_reserve(skb, rxq->headroom); 1412 skb_put(skb, pkt_len); 1413 1414 return skb; 1415 } 1416 1417 static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, 1418 struct mana_rxq *rxq) 1419 { 1420 struct mana_stats_rx *rx_stats = &rxq->stats; 1421 struct net_device *ndev = rxq->ndev; 1422 uint pkt_len = cqe->ppi[0].pkt_len; 1423 u16 rxq_idx = rxq->rxq_idx; 1424 struct napi_struct *napi; 1425 struct xdp_buff xdp = {}; 1426 struct sk_buff *skb; 1427 u32 hash_value; 1428 u32 act; 1429 1430 rxq->rx_cq.work_done++; 1431 napi = &rxq->rx_cq.napi; 1432 1433 if (!buf_va) { 1434 ++ndev->stats.rx_dropped; 1435 return; 1436 } 1437 1438 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1439 1440 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1441 return; 1442 1443 if (act != XDP_PASS && act != XDP_TX) 1444 goto drop_xdp; 1445 1446 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1447 1448 if (!skb) 1449 goto drop; 1450 1451 skb->dev = napi->dev; 1452 1453 skb->protocol = eth_type_trans(skb, ndev); 1454 skb_checksum_none_assert(skb); 1455 skb_record_rx_queue(skb, rxq_idx); 1456 1457 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1458 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1459 skb->ip_summed = CHECKSUM_UNNECESSARY; 1460 } 1461 1462 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1463 hash_value = cqe->ppi[0].pkt_hash; 1464 1465 if (cqe->rx_hashtype & MANA_HASH_L4) 1466 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1467 else 1468 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1469 } 1470 1471 if (cqe->rx_vlantag_present) { 1472 u16 vlan_tci = cqe->rx_vlan_id; 1473 1474 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1475 } 1476 1477 u64_stats_update_begin(&rx_stats->syncp); 1478 rx_stats->packets++; 1479 rx_stats->bytes += pkt_len; 1480 1481 if (act == XDP_TX) 1482 rx_stats->xdp_tx++; 1483 u64_stats_update_end(&rx_stats->syncp); 1484 1485 if (act == XDP_TX) { 1486 skb_set_queue_mapping(skb, rxq_idx); 1487 mana_xdp_tx(skb, ndev); 1488 return; 1489 } 1490 1491 napi_gro_receive(napi, skb); 1492 1493 return; 1494 1495 drop_xdp: 1496 u64_stats_update_begin(&rx_stats->syncp); 1497 rx_stats->xdp_drop++; 1498 u64_stats_update_end(&rx_stats->syncp); 1499 1500 drop: 1501 WARN_ON_ONCE(rxq->xdp_save_va); 1502 /* Save for reuse */ 1503 rxq->xdp_save_va = buf_va; 1504 1505 ++ndev->stats.rx_dropped; 1506 1507 return; 1508 } 1509 1510 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 1511 dma_addr_t *da, bool is_napi) 1512 { 1513 struct page *page; 1514 void *va; 1515 1516 /* Reuse XDP dropped page if available */ 1517 if (rxq->xdp_save_va) { 1518 va = rxq->xdp_save_va; 1519 rxq->xdp_save_va = NULL; 1520 } else if (rxq->alloc_size > PAGE_SIZE) { 1521 if (is_napi) 1522 va = napi_alloc_frag(rxq->alloc_size); 1523 else 1524 va = netdev_alloc_frag(rxq->alloc_size); 1525 1526 if (!va) 1527 return NULL; 1528 1529 page = virt_to_head_page(va); 1530 /* Check if the frag falls back to single page */ 1531 if (compound_order(page) < get_order(rxq->alloc_size)) { 1532 put_page(page); 1533 return NULL; 1534 } 1535 } else { 1536 page = dev_alloc_page(); 1537 if (!page) 1538 return NULL; 1539 1540 va = page_to_virt(page); 1541 } 1542 1543 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 1544 DMA_FROM_DEVICE); 1545 if (dma_mapping_error(dev, *da)) { 1546 put_page(virt_to_head_page(va)); 1547 return NULL; 1548 } 1549 1550 return va; 1551 } 1552 1553 /* Allocate frag for rx buffer, and save the old buf */ 1554 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 1555 struct mana_recv_buf_oob *rxoob, void **old_buf) 1556 { 1557 dma_addr_t da; 1558 void *va; 1559 1560 va = mana_get_rxfrag(rxq, dev, &da, true); 1561 if (!va) 1562 return; 1563 1564 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 1565 DMA_FROM_DEVICE); 1566 *old_buf = rxoob->buf_va; 1567 1568 rxoob->buf_va = va; 1569 rxoob->sgl[0].address = da; 1570 } 1571 1572 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1573 struct gdma_comp *cqe) 1574 { 1575 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1576 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1577 struct net_device *ndev = rxq->ndev; 1578 struct mana_recv_buf_oob *rxbuf_oob; 1579 struct mana_port_context *apc; 1580 struct device *dev = gc->dev; 1581 void *old_buf = NULL; 1582 u32 curr, pktlen; 1583 1584 apc = netdev_priv(ndev); 1585 1586 switch (oob->cqe_hdr.cqe_type) { 1587 case CQE_RX_OKAY: 1588 break; 1589 1590 case CQE_RX_TRUNCATED: 1591 ++ndev->stats.rx_dropped; 1592 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1593 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1594 goto drop; 1595 1596 case CQE_RX_COALESCED_4: 1597 netdev_err(ndev, "RX coalescing is unsupported\n"); 1598 apc->eth_stats.rx_coalesced_err++; 1599 return; 1600 1601 case CQE_RX_OBJECT_FENCE: 1602 complete(&rxq->fence_event); 1603 return; 1604 1605 default: 1606 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1607 oob->cqe_hdr.cqe_type); 1608 apc->eth_stats.rx_cqe_unknown_type++; 1609 return; 1610 } 1611 1612 pktlen = oob->ppi[0].pkt_len; 1613 1614 if (pktlen == 0) { 1615 /* data packets should never have packetlength of zero */ 1616 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1617 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1618 return; 1619 } 1620 1621 curr = rxq->buf_index; 1622 rxbuf_oob = &rxq->rx_oobs[curr]; 1623 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1624 1625 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf); 1626 1627 /* Unsuccessful refill will have old_buf == NULL. 1628 * In this case, mana_rx_skb() will drop the packet. 1629 */ 1630 mana_rx_skb(old_buf, oob, rxq); 1631 1632 drop: 1633 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1634 1635 mana_post_pkt_rxq(rxq); 1636 } 1637 1638 static void mana_poll_rx_cq(struct mana_cq *cq) 1639 { 1640 struct gdma_comp *comp = cq->gdma_comp_buf; 1641 struct mana_rxq *rxq = cq->rxq; 1642 int comp_read, i; 1643 1644 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1645 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1646 1647 rxq->xdp_flush = false; 1648 1649 for (i = 0; i < comp_read; i++) { 1650 if (WARN_ON_ONCE(comp[i].is_sq)) 1651 return; 1652 1653 /* verify recv cqe references the right rxq */ 1654 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1655 return; 1656 1657 mana_process_rx_cqe(rxq, cq, &comp[i]); 1658 } 1659 1660 if (rxq->xdp_flush) 1661 xdp_do_flush(); 1662 } 1663 1664 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1665 { 1666 struct mana_cq *cq = context; 1667 u8 arm_bit; 1668 int w; 1669 1670 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1671 1672 if (cq->type == MANA_CQ_TYPE_RX) 1673 mana_poll_rx_cq(cq); 1674 else 1675 mana_poll_tx_cq(cq); 1676 1677 w = cq->work_done; 1678 1679 if (w < cq->budget && 1680 napi_complete_done(&cq->napi, w)) { 1681 arm_bit = SET_ARM_BIT; 1682 } else { 1683 arm_bit = 0; 1684 } 1685 1686 mana_gd_ring_cq(gdma_queue, arm_bit); 1687 1688 return w; 1689 } 1690 1691 static int mana_poll(struct napi_struct *napi, int budget) 1692 { 1693 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1694 int w; 1695 1696 cq->work_done = 0; 1697 cq->budget = budget; 1698 1699 w = mana_cq_handler(cq, cq->gdma_cq); 1700 1701 return min(w, budget); 1702 } 1703 1704 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1705 { 1706 struct mana_cq *cq = context; 1707 1708 napi_schedule_irqoff(&cq->napi); 1709 } 1710 1711 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1712 { 1713 struct gdma_dev *gd = apc->ac->gdma_dev; 1714 1715 if (!cq->gdma_cq) 1716 return; 1717 1718 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1719 } 1720 1721 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1722 { 1723 struct gdma_dev *gd = apc->ac->gdma_dev; 1724 1725 if (!txq->gdma_sq) 1726 return; 1727 1728 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1729 } 1730 1731 static void mana_destroy_txq(struct mana_port_context *apc) 1732 { 1733 struct napi_struct *napi; 1734 int i; 1735 1736 if (!apc->tx_qp) 1737 return; 1738 1739 for (i = 0; i < apc->num_queues; i++) { 1740 napi = &apc->tx_qp[i].tx_cq.napi; 1741 napi_synchronize(napi); 1742 napi_disable(napi); 1743 netif_napi_del(napi); 1744 1745 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1746 1747 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1748 1749 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1750 } 1751 1752 kfree(apc->tx_qp); 1753 apc->tx_qp = NULL; 1754 } 1755 1756 static int mana_create_txq(struct mana_port_context *apc, 1757 struct net_device *net) 1758 { 1759 struct mana_context *ac = apc->ac; 1760 struct gdma_dev *gd = ac->gdma_dev; 1761 struct mana_obj_spec wq_spec; 1762 struct mana_obj_spec cq_spec; 1763 struct gdma_queue_spec spec; 1764 struct gdma_context *gc; 1765 struct mana_txq *txq; 1766 struct mana_cq *cq; 1767 u32 txq_size; 1768 u32 cq_size; 1769 int err; 1770 int i; 1771 1772 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1773 GFP_KERNEL); 1774 if (!apc->tx_qp) 1775 return -ENOMEM; 1776 1777 /* The minimum size of the WQE is 32 bytes, hence 1778 * MAX_SEND_BUFFERS_PER_QUEUE represents the maximum number of WQEs 1779 * the SQ can store. This value is then used to size other queues 1780 * to prevent overflow. 1781 */ 1782 txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32; 1783 BUILD_BUG_ON(!PAGE_ALIGNED(txq_size)); 1784 1785 cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE; 1786 cq_size = PAGE_ALIGN(cq_size); 1787 1788 gc = gd->gdma_context; 1789 1790 for (i = 0; i < apc->num_queues; i++) { 1791 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1792 1793 /* Create SQ */ 1794 txq = &apc->tx_qp[i].txq; 1795 1796 u64_stats_init(&txq->stats.syncp); 1797 txq->ndev = net; 1798 txq->net_txq = netdev_get_tx_queue(net, i); 1799 txq->vp_offset = apc->tx_vp_offset; 1800 skb_queue_head_init(&txq->pending_skbs); 1801 1802 memset(&spec, 0, sizeof(spec)); 1803 spec.type = GDMA_SQ; 1804 spec.monitor_avl_buf = true; 1805 spec.queue_size = txq_size; 1806 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 1807 if (err) 1808 goto out; 1809 1810 /* Create SQ's CQ */ 1811 cq = &apc->tx_qp[i].tx_cq; 1812 cq->type = MANA_CQ_TYPE_TX; 1813 1814 cq->txq = txq; 1815 1816 memset(&spec, 0, sizeof(spec)); 1817 spec.type = GDMA_CQ; 1818 spec.monitor_avl_buf = false; 1819 spec.queue_size = cq_size; 1820 spec.cq.callback = mana_schedule_napi; 1821 spec.cq.parent_eq = ac->eqs[i].eq; 1822 spec.cq.context = cq; 1823 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 1824 if (err) 1825 goto out; 1826 1827 memset(&wq_spec, 0, sizeof(wq_spec)); 1828 memset(&cq_spec, 0, sizeof(cq_spec)); 1829 1830 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 1831 wq_spec.queue_size = txq->gdma_sq->queue_size; 1832 1833 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 1834 cq_spec.queue_size = cq->gdma_cq->queue_size; 1835 cq_spec.modr_ctx_id = 0; 1836 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 1837 1838 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 1839 &wq_spec, &cq_spec, 1840 &apc->tx_qp[i].tx_object); 1841 1842 if (err) 1843 goto out; 1844 1845 txq->gdma_sq->id = wq_spec.queue_index; 1846 cq->gdma_cq->id = cq_spec.queue_index; 1847 1848 txq->gdma_sq->mem_info.dma_region_handle = 1849 GDMA_INVALID_DMA_REGION; 1850 cq->gdma_cq->mem_info.dma_region_handle = 1851 GDMA_INVALID_DMA_REGION; 1852 1853 txq->gdma_txq_id = txq->gdma_sq->id; 1854 1855 cq->gdma_id = cq->gdma_cq->id; 1856 1857 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 1858 err = -EINVAL; 1859 goto out; 1860 } 1861 1862 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 1863 1864 netif_napi_add_tx(net, &cq->napi, mana_poll); 1865 napi_enable(&cq->napi); 1866 1867 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 1868 } 1869 1870 return 0; 1871 out: 1872 mana_destroy_txq(apc); 1873 return err; 1874 } 1875 1876 static void mana_destroy_rxq(struct mana_port_context *apc, 1877 struct mana_rxq *rxq, bool validate_state) 1878 1879 { 1880 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1881 struct mana_recv_buf_oob *rx_oob; 1882 struct device *dev = gc->dev; 1883 struct napi_struct *napi; 1884 int i; 1885 1886 if (!rxq) 1887 return; 1888 1889 napi = &rxq->rx_cq.napi; 1890 1891 if (validate_state) 1892 napi_synchronize(napi); 1893 1894 napi_disable(napi); 1895 1896 xdp_rxq_info_unreg(&rxq->xdp_rxq); 1897 1898 netif_napi_del(napi); 1899 1900 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 1901 1902 mana_deinit_cq(apc, &rxq->rx_cq); 1903 1904 if (rxq->xdp_save_va) 1905 put_page(virt_to_head_page(rxq->xdp_save_va)); 1906 1907 for (i = 0; i < rxq->num_rx_buf; i++) { 1908 rx_oob = &rxq->rx_oobs[i]; 1909 1910 if (!rx_oob->buf_va) 1911 continue; 1912 1913 dma_unmap_single(dev, rx_oob->sgl[0].address, 1914 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 1915 1916 put_page(virt_to_head_page(rx_oob->buf_va)); 1917 rx_oob->buf_va = NULL; 1918 } 1919 1920 if (rxq->gdma_rq) 1921 mana_gd_destroy_queue(gc, rxq->gdma_rq); 1922 1923 kfree(rxq); 1924 } 1925 1926 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 1927 struct mana_rxq *rxq, struct device *dev) 1928 { 1929 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 1930 dma_addr_t da; 1931 void *va; 1932 1933 if (mpc->rxbufs_pre) 1934 va = mana_get_rxbuf_pre(rxq, &da); 1935 else 1936 va = mana_get_rxfrag(rxq, dev, &da, false); 1937 1938 if (!va) 1939 return -ENOMEM; 1940 1941 rx_oob->buf_va = va; 1942 1943 rx_oob->sgl[0].address = da; 1944 rx_oob->sgl[0].size = rxq->datasize; 1945 rx_oob->sgl[0].mem_key = mem_key; 1946 1947 return 0; 1948 } 1949 1950 #define MANA_WQE_HEADER_SIZE 16 1951 #define MANA_WQE_SGE_SIZE 16 1952 1953 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 1954 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 1955 { 1956 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1957 struct mana_recv_buf_oob *rx_oob; 1958 struct device *dev = gc->dev; 1959 u32 buf_idx; 1960 int ret; 1961 1962 WARN_ON(rxq->datasize == 0); 1963 1964 *rxq_size = 0; 1965 *cq_size = 0; 1966 1967 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 1968 rx_oob = &rxq->rx_oobs[buf_idx]; 1969 memset(rx_oob, 0, sizeof(*rx_oob)); 1970 1971 rx_oob->num_sge = 1; 1972 1973 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 1974 dev); 1975 if (ret) 1976 return ret; 1977 1978 rx_oob->wqe_req.sgl = rx_oob->sgl; 1979 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 1980 rx_oob->wqe_req.inline_oob_size = 0; 1981 rx_oob->wqe_req.inline_oob_data = NULL; 1982 rx_oob->wqe_req.flags = 0; 1983 rx_oob->wqe_req.client_data_unit = 0; 1984 1985 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 1986 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 1987 *cq_size += COMP_ENTRY_SIZE; 1988 } 1989 1990 return 0; 1991 } 1992 1993 static int mana_push_wqe(struct mana_rxq *rxq) 1994 { 1995 struct mana_recv_buf_oob *rx_oob; 1996 u32 buf_idx; 1997 int err; 1998 1999 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2000 rx_oob = &rxq->rx_oobs[buf_idx]; 2001 2002 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2003 &rx_oob->wqe_inf); 2004 if (err) 2005 return -ENOSPC; 2006 } 2007 2008 return 0; 2009 } 2010 2011 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2012 u32 rxq_idx, struct mana_eq *eq, 2013 struct net_device *ndev) 2014 { 2015 struct gdma_dev *gd = apc->ac->gdma_dev; 2016 struct mana_obj_spec wq_spec; 2017 struct mana_obj_spec cq_spec; 2018 struct gdma_queue_spec spec; 2019 struct mana_cq *cq = NULL; 2020 struct gdma_context *gc; 2021 u32 cq_size, rq_size; 2022 struct mana_rxq *rxq; 2023 int err; 2024 2025 gc = gd->gdma_context; 2026 2027 rxq = kzalloc(struct_size(rxq, rx_oobs, RX_BUFFERS_PER_QUEUE), 2028 GFP_KERNEL); 2029 if (!rxq) 2030 return NULL; 2031 2032 rxq->ndev = ndev; 2033 rxq->num_rx_buf = RX_BUFFERS_PER_QUEUE; 2034 rxq->rxq_idx = rxq_idx; 2035 rxq->rxobj = INVALID_MANA_HANDLE; 2036 2037 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2038 &rxq->headroom); 2039 2040 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2041 if (err) 2042 goto out; 2043 2044 rq_size = PAGE_ALIGN(rq_size); 2045 cq_size = PAGE_ALIGN(cq_size); 2046 2047 /* Create RQ */ 2048 memset(&spec, 0, sizeof(spec)); 2049 spec.type = GDMA_RQ; 2050 spec.monitor_avl_buf = true; 2051 spec.queue_size = rq_size; 2052 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2053 if (err) 2054 goto out; 2055 2056 /* Create RQ's CQ */ 2057 cq = &rxq->rx_cq; 2058 cq->type = MANA_CQ_TYPE_RX; 2059 cq->rxq = rxq; 2060 2061 memset(&spec, 0, sizeof(spec)); 2062 spec.type = GDMA_CQ; 2063 spec.monitor_avl_buf = false; 2064 spec.queue_size = cq_size; 2065 spec.cq.callback = mana_schedule_napi; 2066 spec.cq.parent_eq = eq->eq; 2067 spec.cq.context = cq; 2068 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2069 if (err) 2070 goto out; 2071 2072 memset(&wq_spec, 0, sizeof(wq_spec)); 2073 memset(&cq_spec, 0, sizeof(cq_spec)); 2074 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2075 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2076 2077 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2078 cq_spec.queue_size = cq->gdma_cq->queue_size; 2079 cq_spec.modr_ctx_id = 0; 2080 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2081 2082 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2083 &wq_spec, &cq_spec, &rxq->rxobj); 2084 if (err) 2085 goto out; 2086 2087 rxq->gdma_rq->id = wq_spec.queue_index; 2088 cq->gdma_cq->id = cq_spec.queue_index; 2089 2090 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2091 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2092 2093 rxq->gdma_id = rxq->gdma_rq->id; 2094 cq->gdma_id = cq->gdma_cq->id; 2095 2096 err = mana_push_wqe(rxq); 2097 if (err) 2098 goto out; 2099 2100 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2101 err = -EINVAL; 2102 goto out; 2103 } 2104 2105 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2106 2107 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2108 2109 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2110 cq->napi.napi_id)); 2111 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, 2112 MEM_TYPE_PAGE_SHARED, NULL)); 2113 2114 napi_enable(&cq->napi); 2115 2116 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2117 out: 2118 if (!err) 2119 return rxq; 2120 2121 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2122 2123 mana_destroy_rxq(apc, rxq, false); 2124 2125 if (cq) 2126 mana_deinit_cq(apc, cq); 2127 2128 return NULL; 2129 } 2130 2131 static int mana_add_rx_queues(struct mana_port_context *apc, 2132 struct net_device *ndev) 2133 { 2134 struct mana_context *ac = apc->ac; 2135 struct mana_rxq *rxq; 2136 int err = 0; 2137 int i; 2138 2139 for (i = 0; i < apc->num_queues; i++) { 2140 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2141 if (!rxq) { 2142 err = -ENOMEM; 2143 goto out; 2144 } 2145 2146 u64_stats_init(&rxq->stats.syncp); 2147 2148 apc->rxqs[i] = rxq; 2149 } 2150 2151 apc->default_rxobj = apc->rxqs[0]->rxobj; 2152 out: 2153 return err; 2154 } 2155 2156 static void mana_destroy_vport(struct mana_port_context *apc) 2157 { 2158 struct gdma_dev *gd = apc->ac->gdma_dev; 2159 struct mana_rxq *rxq; 2160 u32 rxq_idx; 2161 2162 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2163 rxq = apc->rxqs[rxq_idx]; 2164 if (!rxq) 2165 continue; 2166 2167 mana_destroy_rxq(apc, rxq, true); 2168 apc->rxqs[rxq_idx] = NULL; 2169 } 2170 2171 mana_destroy_txq(apc); 2172 mana_uncfg_vport(apc); 2173 2174 if (gd->gdma_context->is_pf) 2175 mana_pf_deregister_hw_vport(apc); 2176 } 2177 2178 static int mana_create_vport(struct mana_port_context *apc, 2179 struct net_device *net) 2180 { 2181 struct gdma_dev *gd = apc->ac->gdma_dev; 2182 int err; 2183 2184 apc->default_rxobj = INVALID_MANA_HANDLE; 2185 2186 if (gd->gdma_context->is_pf) { 2187 err = mana_pf_register_hw_vport(apc); 2188 if (err) 2189 return err; 2190 } 2191 2192 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2193 if (err) 2194 return err; 2195 2196 return mana_create_txq(apc, net); 2197 } 2198 2199 static void mana_rss_table_init(struct mana_port_context *apc) 2200 { 2201 int i; 2202 2203 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 2204 apc->indir_table[i] = 2205 ethtool_rxfh_indir_default(i, apc->num_queues); 2206 } 2207 2208 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2209 bool update_hash, bool update_tab) 2210 { 2211 u32 queue_idx; 2212 int err; 2213 int i; 2214 2215 if (update_tab) { 2216 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) { 2217 queue_idx = apc->indir_table[i]; 2218 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2219 } 2220 } 2221 2222 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2223 if (err) 2224 return err; 2225 2226 mana_fence_rqs(apc); 2227 2228 return 0; 2229 } 2230 2231 static int mana_init_port(struct net_device *ndev) 2232 { 2233 struct mana_port_context *apc = netdev_priv(ndev); 2234 u32 max_txq, max_rxq, max_queues; 2235 int port_idx = apc->port_idx; 2236 u32 num_indirect_entries; 2237 int err; 2238 2239 err = mana_init_port_context(apc); 2240 if (err) 2241 return err; 2242 2243 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2244 &num_indirect_entries); 2245 if (err) { 2246 netdev_err(ndev, "Failed to query info for vPort %d\n", 2247 port_idx); 2248 goto reset_apc; 2249 } 2250 2251 max_queues = min_t(u32, max_txq, max_rxq); 2252 if (apc->max_queues > max_queues) 2253 apc->max_queues = max_queues; 2254 2255 if (apc->num_queues > apc->max_queues) 2256 apc->num_queues = apc->max_queues; 2257 2258 eth_hw_addr_set(ndev, apc->mac_addr); 2259 2260 return 0; 2261 2262 reset_apc: 2263 kfree(apc->rxqs); 2264 apc->rxqs = NULL; 2265 return err; 2266 } 2267 2268 int mana_alloc_queues(struct net_device *ndev) 2269 { 2270 struct mana_port_context *apc = netdev_priv(ndev); 2271 struct gdma_dev *gd = apc->ac->gdma_dev; 2272 int err; 2273 2274 err = mana_create_vport(apc, ndev); 2275 if (err) 2276 return err; 2277 2278 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2279 if (err) 2280 goto destroy_vport; 2281 2282 err = mana_add_rx_queues(apc, ndev); 2283 if (err) 2284 goto destroy_vport; 2285 2286 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2287 2288 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2289 if (err) 2290 goto destroy_vport; 2291 2292 mana_rss_table_init(apc); 2293 2294 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2295 if (err) 2296 goto destroy_vport; 2297 2298 if (gd->gdma_context->is_pf) { 2299 err = mana_pf_register_filter(apc); 2300 if (err) 2301 goto destroy_vport; 2302 } 2303 2304 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2305 2306 return 0; 2307 2308 destroy_vport: 2309 mana_destroy_vport(apc); 2310 return err; 2311 } 2312 2313 int mana_attach(struct net_device *ndev) 2314 { 2315 struct mana_port_context *apc = netdev_priv(ndev); 2316 int err; 2317 2318 ASSERT_RTNL(); 2319 2320 err = mana_init_port(ndev); 2321 if (err) 2322 return err; 2323 2324 if (apc->port_st_save) { 2325 err = mana_alloc_queues(ndev); 2326 if (err) { 2327 mana_cleanup_port_context(apc); 2328 return err; 2329 } 2330 } 2331 2332 apc->port_is_up = apc->port_st_save; 2333 2334 /* Ensure port state updated before txq state */ 2335 smp_wmb(); 2336 2337 if (apc->port_is_up) 2338 netif_carrier_on(ndev); 2339 2340 netif_device_attach(ndev); 2341 2342 return 0; 2343 } 2344 2345 static int mana_dealloc_queues(struct net_device *ndev) 2346 { 2347 struct mana_port_context *apc = netdev_priv(ndev); 2348 struct gdma_dev *gd = apc->ac->gdma_dev; 2349 struct mana_txq *txq; 2350 int i, err; 2351 2352 if (apc->port_is_up) 2353 return -EINVAL; 2354 2355 mana_chn_setxdp(apc, NULL); 2356 2357 if (gd->gdma_context->is_pf) 2358 mana_pf_deregister_filter(apc); 2359 2360 /* No packet can be transmitted now since apc->port_is_up is false. 2361 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2362 * a txq because it may not timely see apc->port_is_up being cleared 2363 * to false, but it doesn't matter since mana_start_xmit() drops any 2364 * new packets due to apc->port_is_up being false. 2365 * 2366 * Drain all the in-flight TX packets 2367 */ 2368 for (i = 0; i < apc->num_queues; i++) { 2369 txq = &apc->tx_qp[i].txq; 2370 2371 while (atomic_read(&txq->pending_sends) > 0) 2372 usleep_range(1000, 2000); 2373 } 2374 2375 /* We're 100% sure the queues can no longer be woken up, because 2376 * we're sure now mana_poll_tx_cq() can't be running. 2377 */ 2378 2379 apc->rss_state = TRI_STATE_FALSE; 2380 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2381 if (err) { 2382 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2383 return err; 2384 } 2385 2386 mana_destroy_vport(apc); 2387 2388 return 0; 2389 } 2390 2391 int mana_detach(struct net_device *ndev, bool from_close) 2392 { 2393 struct mana_port_context *apc = netdev_priv(ndev); 2394 int err; 2395 2396 ASSERT_RTNL(); 2397 2398 apc->port_st_save = apc->port_is_up; 2399 apc->port_is_up = false; 2400 2401 /* Ensure port state updated before txq state */ 2402 smp_wmb(); 2403 2404 netif_tx_disable(ndev); 2405 netif_carrier_off(ndev); 2406 2407 if (apc->port_st_save) { 2408 err = mana_dealloc_queues(ndev); 2409 if (err) 2410 return err; 2411 } 2412 2413 if (!from_close) { 2414 netif_device_detach(ndev); 2415 mana_cleanup_port_context(apc); 2416 } 2417 2418 return 0; 2419 } 2420 2421 static int mana_probe_port(struct mana_context *ac, int port_idx, 2422 struct net_device **ndev_storage) 2423 { 2424 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2425 struct mana_port_context *apc; 2426 struct net_device *ndev; 2427 int err; 2428 2429 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2430 gc->max_num_queues); 2431 if (!ndev) 2432 return -ENOMEM; 2433 2434 *ndev_storage = ndev; 2435 2436 apc = netdev_priv(ndev); 2437 apc->ac = ac; 2438 apc->ndev = ndev; 2439 apc->max_queues = gc->max_num_queues; 2440 apc->num_queues = gc->max_num_queues; 2441 apc->port_handle = INVALID_MANA_HANDLE; 2442 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2443 apc->port_idx = port_idx; 2444 2445 mutex_init(&apc->vport_mutex); 2446 apc->vport_use_count = 0; 2447 2448 ndev->netdev_ops = &mana_devops; 2449 ndev->ethtool_ops = &mana_ethtool_ops; 2450 ndev->mtu = ETH_DATA_LEN; 2451 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2452 ndev->min_mtu = ETH_MIN_MTU; 2453 ndev->needed_headroom = MANA_HEADROOM; 2454 ndev->dev_port = port_idx; 2455 SET_NETDEV_DEV(ndev, gc->dev); 2456 2457 netif_carrier_off(ndev); 2458 2459 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2460 2461 err = mana_init_port(ndev); 2462 if (err) 2463 goto free_net; 2464 2465 netdev_lockdep_set_classes(ndev); 2466 2467 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2468 ndev->hw_features |= NETIF_F_RXCSUM; 2469 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2470 ndev->hw_features |= NETIF_F_RXHASH; 2471 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2472 NETIF_F_HW_VLAN_CTAG_RX; 2473 ndev->vlan_features = ndev->features; 2474 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | 2475 NETDEV_XDP_ACT_NDO_XMIT; 2476 2477 err = register_netdev(ndev); 2478 if (err) { 2479 netdev_err(ndev, "Unable to register netdev.\n"); 2480 goto reset_apc; 2481 } 2482 2483 return 0; 2484 2485 reset_apc: 2486 kfree(apc->rxqs); 2487 apc->rxqs = NULL; 2488 free_net: 2489 *ndev_storage = NULL; 2490 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2491 free_netdev(ndev); 2492 return err; 2493 } 2494 2495 static void adev_release(struct device *dev) 2496 { 2497 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2498 2499 kfree(madev); 2500 } 2501 2502 static void remove_adev(struct gdma_dev *gd) 2503 { 2504 struct auxiliary_device *adev = gd->adev; 2505 int id = adev->id; 2506 2507 auxiliary_device_delete(adev); 2508 auxiliary_device_uninit(adev); 2509 2510 mana_adev_idx_free(id); 2511 gd->adev = NULL; 2512 } 2513 2514 static int add_adev(struct gdma_dev *gd) 2515 { 2516 struct auxiliary_device *adev; 2517 struct mana_adev *madev; 2518 int ret; 2519 2520 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2521 if (!madev) 2522 return -ENOMEM; 2523 2524 adev = &madev->adev; 2525 ret = mana_adev_idx_alloc(); 2526 if (ret < 0) 2527 goto idx_fail; 2528 adev->id = ret; 2529 2530 adev->name = "rdma"; 2531 adev->dev.parent = gd->gdma_context->dev; 2532 adev->dev.release = adev_release; 2533 madev->mdev = gd; 2534 2535 ret = auxiliary_device_init(adev); 2536 if (ret) 2537 goto init_fail; 2538 2539 ret = auxiliary_device_add(adev); 2540 if (ret) 2541 goto add_fail; 2542 2543 gd->adev = adev; 2544 return 0; 2545 2546 add_fail: 2547 auxiliary_device_uninit(adev); 2548 2549 init_fail: 2550 mana_adev_idx_free(adev->id); 2551 2552 idx_fail: 2553 kfree(madev); 2554 2555 return ret; 2556 } 2557 2558 int mana_probe(struct gdma_dev *gd, bool resuming) 2559 { 2560 struct gdma_context *gc = gd->gdma_context; 2561 struct mana_context *ac = gd->driver_data; 2562 struct device *dev = gc->dev; 2563 u16 num_ports = 0; 2564 int err; 2565 int i; 2566 2567 dev_info(dev, 2568 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2569 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2570 2571 err = mana_gd_register_device(gd); 2572 if (err) 2573 return err; 2574 2575 if (!resuming) { 2576 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 2577 if (!ac) 2578 return -ENOMEM; 2579 2580 ac->gdma_dev = gd; 2581 gd->driver_data = ac; 2582 } 2583 2584 err = mana_create_eq(ac); 2585 if (err) 2586 goto out; 2587 2588 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 2589 MANA_MICRO_VERSION, &num_ports); 2590 if (err) 2591 goto out; 2592 2593 if (!resuming) { 2594 ac->num_ports = num_ports; 2595 } else { 2596 if (ac->num_ports != num_ports) { 2597 dev_err(dev, "The number of vPorts changed: %d->%d\n", 2598 ac->num_ports, num_ports); 2599 err = -EPROTO; 2600 goto out; 2601 } 2602 } 2603 2604 if (ac->num_ports == 0) 2605 dev_err(dev, "Failed to detect any vPort\n"); 2606 2607 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 2608 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 2609 2610 if (!resuming) { 2611 for (i = 0; i < ac->num_ports; i++) { 2612 err = mana_probe_port(ac, i, &ac->ports[i]); 2613 if (err) 2614 break; 2615 } 2616 } else { 2617 for (i = 0; i < ac->num_ports; i++) { 2618 rtnl_lock(); 2619 err = mana_attach(ac->ports[i]); 2620 rtnl_unlock(); 2621 if (err) 2622 break; 2623 } 2624 } 2625 2626 err = add_adev(gd); 2627 out: 2628 if (err) 2629 mana_remove(gd, false); 2630 2631 return err; 2632 } 2633 2634 void mana_remove(struct gdma_dev *gd, bool suspending) 2635 { 2636 struct gdma_context *gc = gd->gdma_context; 2637 struct mana_context *ac = gd->driver_data; 2638 struct device *dev = gc->dev; 2639 struct net_device *ndev; 2640 int err; 2641 int i; 2642 2643 /* adev currently doesn't support suspending, always remove it */ 2644 if (gd->adev) 2645 remove_adev(gd); 2646 2647 for (i = 0; i < ac->num_ports; i++) { 2648 ndev = ac->ports[i]; 2649 if (!ndev) { 2650 if (i == 0) 2651 dev_err(dev, "No net device to remove\n"); 2652 goto out; 2653 } 2654 2655 /* All cleanup actions should stay after rtnl_lock(), otherwise 2656 * other functions may access partially cleaned up data. 2657 */ 2658 rtnl_lock(); 2659 2660 err = mana_detach(ndev, false); 2661 if (err) 2662 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 2663 i, err); 2664 2665 if (suspending) { 2666 /* No need to unregister the ndev. */ 2667 rtnl_unlock(); 2668 continue; 2669 } 2670 2671 unregister_netdevice(ndev); 2672 2673 rtnl_unlock(); 2674 2675 free_netdev(ndev); 2676 } 2677 2678 mana_destroy_eq(ac); 2679 out: 2680 mana_gd_deregister_device(gd); 2681 2682 if (suspending) 2683 return; 2684 2685 gd->driver_data = NULL; 2686 gd->gdma_context = NULL; 2687 kfree(ac); 2688 } 2689