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/debugfs.h> 7 #include <linux/inetdevice.h> 8 #include <linux/etherdevice.h> 9 #include <linux/ethtool.h> 10 #include <linux/filter.h> 11 #include <linux/mm.h> 12 #include <linux/pci.h> 13 #include <linux/export.h> 14 #include <linux/skbuff.h> 15 16 #include <net/checksum.h> 17 #include <net/ip6_checksum.h> 18 #include <net/netdev_lock.h> 19 #include <net/page_pool/helpers.h> 20 #include <net/xdp.h> 21 22 #include <net/mana/mana.h> 23 #include <net/mana/mana_auxiliary.h> 24 #include <net/mana/hw_channel.h> 25 26 static DEFINE_IDA(mana_adev_ida); 27 28 static int mana_adev_idx_alloc(void) 29 { 30 return ida_alloc(&mana_adev_ida, GFP_KERNEL); 31 } 32 33 static void mana_adev_idx_free(int idx) 34 { 35 ida_free(&mana_adev_ida, idx); 36 } 37 38 static ssize_t mana_dbg_q_read(struct file *filp, char __user *buf, size_t count, 39 loff_t *pos) 40 { 41 struct gdma_queue *gdma_q = filp->private_data; 42 43 return simple_read_from_buffer(buf, count, pos, gdma_q->queue_mem_ptr, 44 gdma_q->queue_size); 45 } 46 47 static const struct file_operations mana_dbg_q_fops = { 48 .owner = THIS_MODULE, 49 .open = simple_open, 50 .read = mana_dbg_q_read, 51 }; 52 53 static bool mana_en_need_log(struct mana_port_context *apc, int err) 54 { 55 if (apc && apc->ac && apc->ac->gdma_dev && 56 apc->ac->gdma_dev->gdma_context) 57 return mana_need_log(apc->ac->gdma_dev->gdma_context, err); 58 else 59 return true; 60 } 61 62 static void mana_put_rx_page(struct mana_rxq *rxq, struct page *page, 63 bool from_pool) 64 { 65 if (from_pool) 66 page_pool_put_full_page(rxq->page_pool, page, false); 67 else 68 put_page(page); 69 } 70 71 /* Microsoft Azure Network Adapter (MANA) functions */ 72 73 static int mana_open(struct net_device *ndev) 74 { 75 struct mana_port_context *apc = netdev_priv(ndev); 76 int err; 77 err = mana_alloc_queues(ndev); 78 79 if (err) { 80 netdev_err(ndev, "%s failed to allocate queues: %d\n", __func__, err); 81 return err; 82 } 83 84 apc->port_is_up = true; 85 86 /* Ensure port state updated before txq state */ 87 smp_wmb(); 88 89 netif_tx_wake_all_queues(ndev); 90 netdev_dbg(ndev, "%s successful\n", __func__); 91 return 0; 92 } 93 94 static int mana_close(struct net_device *ndev) 95 { 96 struct mana_port_context *apc = netdev_priv(ndev); 97 98 if (!apc->port_is_up) 99 return 0; 100 101 return mana_detach(ndev, true); 102 } 103 104 static void mana_link_state_handle(struct work_struct *w) 105 { 106 struct mana_context *ac; 107 struct net_device *ndev; 108 u32 link_event; 109 bool link_up; 110 int i; 111 112 ac = container_of(w, struct mana_context, link_change_work); 113 114 rtnl_lock(); 115 116 link_event = READ_ONCE(ac->link_event); 117 118 if (link_event == HWC_DATA_HW_LINK_CONNECT) 119 link_up = true; 120 else if (link_event == HWC_DATA_HW_LINK_DISCONNECT) 121 link_up = false; 122 else 123 goto out; 124 125 /* Process all ports */ 126 for (i = 0; i < ac->num_ports; i++) { 127 ndev = ac->ports[i]; 128 if (!ndev) 129 continue; 130 131 if (link_up) { 132 netif_carrier_on(ndev); 133 134 __netdev_notify_peers(ndev); 135 } else { 136 netif_carrier_off(ndev); 137 } 138 } 139 140 out: 141 rtnl_unlock(); 142 } 143 144 static bool mana_can_tx(struct gdma_queue *wq) 145 { 146 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE; 147 } 148 149 static unsigned int mana_checksum_info(struct sk_buff *skb) 150 { 151 if (skb->protocol == htons(ETH_P_IP)) { 152 struct iphdr *ip = ip_hdr(skb); 153 154 if (ip->protocol == IPPROTO_TCP) 155 return IPPROTO_TCP; 156 157 if (ip->protocol == IPPROTO_UDP) 158 return IPPROTO_UDP; 159 } else if (skb->protocol == htons(ETH_P_IPV6)) { 160 struct ipv6hdr *ip6 = ipv6_hdr(skb); 161 162 if (ip6->nexthdr == IPPROTO_TCP) 163 return IPPROTO_TCP; 164 165 if (ip6->nexthdr == IPPROTO_UDP) 166 return IPPROTO_UDP; 167 } 168 169 /* No csum offloading */ 170 return 0; 171 } 172 173 static void mana_add_sge(struct mana_tx_package *tp, struct mana_skb_head *ash, 174 int sg_i, dma_addr_t da, int sge_len, u32 gpa_mkey) 175 { 176 ash->dma_handle[sg_i] = da; 177 ash->size[sg_i] = sge_len; 178 179 tp->wqe_req.sgl[sg_i].address = da; 180 tp->wqe_req.sgl[sg_i].mem_key = gpa_mkey; 181 tp->wqe_req.sgl[sg_i].size = sge_len; 182 } 183 184 static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc, 185 struct mana_tx_package *tp, int gso_hs) 186 { 187 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 188 int hsg = 1; /* num of SGEs of linear part */ 189 struct gdma_dev *gd = apc->ac->gdma_dev; 190 int skb_hlen = skb_headlen(skb); 191 int sge0_len, sge1_len = 0; 192 struct gdma_context *gc; 193 struct device *dev; 194 skb_frag_t *frag; 195 dma_addr_t da; 196 int sg_i; 197 int i; 198 199 gc = gd->gdma_context; 200 dev = gc->dev; 201 202 if (gso_hs && gso_hs < skb_hlen) { 203 sge0_len = gso_hs; 204 sge1_len = skb_hlen - gso_hs; 205 } else { 206 sge0_len = skb_hlen; 207 } 208 209 da = dma_map_single(dev, skb->data, sge0_len, DMA_TO_DEVICE); 210 if (dma_mapping_error(dev, da)) 211 return -ENOMEM; 212 213 mana_add_sge(tp, ash, 0, da, sge0_len, gd->gpa_mkey); 214 215 if (sge1_len) { 216 sg_i = 1; 217 da = dma_map_single(dev, skb->data + sge0_len, sge1_len, 218 DMA_TO_DEVICE); 219 if (dma_mapping_error(dev, da)) 220 goto frag_err; 221 222 mana_add_sge(tp, ash, sg_i, da, sge1_len, gd->gpa_mkey); 223 hsg = 2; 224 } 225 226 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 227 sg_i = hsg + i; 228 229 frag = &skb_shinfo(skb)->frags[i]; 230 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 231 DMA_TO_DEVICE); 232 if (dma_mapping_error(dev, da)) 233 goto frag_err; 234 235 mana_add_sge(tp, ash, sg_i, da, skb_frag_size(frag), 236 gd->gpa_mkey); 237 } 238 239 return 0; 240 241 frag_err: 242 if (net_ratelimit()) 243 netdev_err(apc->ndev, "Failed to map skb of size %u to DMA\n", 244 skb->len); 245 for (i = sg_i - 1; i >= hsg; i--) 246 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 247 DMA_TO_DEVICE); 248 249 for (i = hsg - 1; i >= 0; i--) 250 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 251 DMA_TO_DEVICE); 252 253 return -ENOMEM; 254 } 255 256 /* Handle the case when GSO SKB linear length is too large. 257 * MANA NIC requires GSO packets to put only the packet header to SGE0. 258 * So, we need 2 SGEs for the skb linear part which contains more than the 259 * header. 260 * Return a positive value for the number of SGEs, or a negative value 261 * for an error. 262 */ 263 static int mana_fix_skb_head(struct net_device *ndev, struct sk_buff *skb, 264 int gso_hs) 265 { 266 int num_sge = 1 + skb_shinfo(skb)->nr_frags; 267 int skb_hlen = skb_headlen(skb); 268 269 if (gso_hs < skb_hlen) { 270 num_sge++; 271 } else if (gso_hs > skb_hlen) { 272 if (net_ratelimit()) 273 netdev_err(ndev, 274 "TX nonlinear head: hs:%d, skb_hlen:%d\n", 275 gso_hs, skb_hlen); 276 277 return -EINVAL; 278 } 279 280 return num_sge; 281 } 282 283 /* Get the GSO packet's header size */ 284 static int mana_get_gso_hs(struct sk_buff *skb) 285 { 286 int gso_hs; 287 288 if (skb->encapsulation) { 289 gso_hs = skb_inner_tcp_all_headers(skb); 290 } else { 291 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 292 gso_hs = skb_transport_offset(skb) + 293 sizeof(struct udphdr); 294 } else { 295 gso_hs = skb_tcp_all_headers(skb); 296 } 297 } 298 299 return gso_hs; 300 } 301 302 static void mana_per_port_queue_reset_work_handler(struct work_struct *work) 303 { 304 struct mana_port_context *apc = container_of(work, 305 struct mana_port_context, 306 queue_reset_work); 307 struct net_device *ndev = apc->ndev; 308 int err; 309 310 rtnl_lock(); 311 312 /* Pre-allocate buffers to prevent failure in mana_attach later */ 313 err = mana_pre_alloc_rxbufs(apc, ndev->mtu, apc->num_queues); 314 if (err) { 315 netdev_err(ndev, "Insufficient memory for reset post tx stall detection\n"); 316 goto out; 317 } 318 319 err = mana_detach(ndev, false); 320 if (err) { 321 netdev_err(ndev, "mana_detach failed: %d\n", err); 322 goto dealloc_pre_rxbufs; 323 } 324 325 err = mana_attach(ndev); 326 if (err) 327 netdev_err(ndev, "mana_attach failed: %d\n", err); 328 329 dealloc_pre_rxbufs: 330 mana_pre_dealloc_rxbufs(apc); 331 out: 332 rtnl_unlock(); 333 } 334 335 netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) 336 { 337 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT; 338 struct mana_port_context *apc = netdev_priv(ndev); 339 int gso_hs = 0; /* zero for non-GSO pkts */ 340 u16 txq_idx = skb_get_queue_mapping(skb); 341 struct gdma_dev *gd = apc->ac->gdma_dev; 342 bool ipv4 = false, ipv6 = false; 343 struct mana_tx_package pkg = {}; 344 struct netdev_queue *net_txq; 345 struct mana_stats_tx *tx_stats; 346 struct gdma_queue *gdma_sq; 347 int err, len, num_gso_seg; 348 unsigned int csum_type; 349 struct mana_txq *txq; 350 struct mana_cq *cq; 351 352 if (unlikely(!apc->port_is_up)) 353 goto tx_drop; 354 355 if (skb_cow_head(skb, MANA_HEADROOM)) 356 goto tx_drop_count; 357 358 txq = &apc->tx_qp[txq_idx].txq; 359 gdma_sq = txq->gdma_sq; 360 cq = &apc->tx_qp[txq_idx].tx_cq; 361 tx_stats = &txq->stats; 362 363 BUILD_BUG_ON(MAX_TX_WQE_SGL_ENTRIES != MANA_MAX_TX_WQE_SGL_ENTRIES); 364 if (MAX_SKB_FRAGS + 2 > MAX_TX_WQE_SGL_ENTRIES && 365 skb_shinfo(skb)->nr_frags + 2 > MAX_TX_WQE_SGL_ENTRIES) { 366 /* GSO skb with Hardware SGE limit exceeded is not expected here 367 * as they are handled in mana_features_check() callback 368 */ 369 if (skb_linearize(skb)) { 370 netdev_warn_once(ndev, "Failed to linearize skb with nr_frags=%d and is_gso=%d\n", 371 skb_shinfo(skb)->nr_frags, 372 skb_is_gso(skb)); 373 goto tx_drop_count; 374 } 375 apc->eth_stats.tx_linear_pkt_cnt++; 376 } 377 378 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id; 379 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame; 380 381 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) { 382 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset; 383 pkt_fmt = MANA_LONG_PKT_FMT; 384 } else { 385 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; 386 } 387 388 if (skb_vlan_tag_present(skb)) { 389 pkt_fmt = MANA_LONG_PKT_FMT; 390 pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1; 391 pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb); 392 pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb); 393 pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb); 394 } 395 396 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt; 397 398 if (pkt_fmt == MANA_SHORT_PKT_FMT) { 399 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob); 400 u64_stats_update_begin(&tx_stats->syncp); 401 tx_stats->short_pkt_fmt++; 402 u64_stats_update_end(&tx_stats->syncp); 403 } else { 404 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob); 405 u64_stats_update_begin(&tx_stats->syncp); 406 tx_stats->long_pkt_fmt++; 407 u64_stats_update_end(&tx_stats->syncp); 408 } 409 410 pkg.wqe_req.inline_oob_data = &pkg.tx_oob; 411 pkg.wqe_req.flags = 0; 412 pkg.wqe_req.client_data_unit = 0; 413 414 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; 415 416 if (skb->protocol == htons(ETH_P_IP)) 417 ipv4 = true; 418 else if (skb->protocol == htons(ETH_P_IPV6)) 419 ipv6 = true; 420 421 if (skb_is_gso(skb)) { 422 int num_sge; 423 424 gso_hs = mana_get_gso_hs(skb); 425 426 num_sge = mana_fix_skb_head(ndev, skb, gso_hs); 427 if (num_sge > 0) 428 pkg.wqe_req.num_sge = num_sge; 429 else 430 goto tx_drop_count; 431 432 u64_stats_update_begin(&tx_stats->syncp); 433 if (skb->encapsulation) { 434 tx_stats->tso_inner_packets++; 435 tx_stats->tso_inner_bytes += skb->len - gso_hs; 436 } else { 437 tx_stats->tso_packets++; 438 tx_stats->tso_bytes += skb->len - gso_hs; 439 } 440 u64_stats_update_end(&tx_stats->syncp); 441 442 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 443 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 444 445 pkg.tx_oob.s_oob.comp_iphdr_csum = 1; 446 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 447 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 448 449 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size; 450 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0; 451 if (ipv4) { 452 ip_hdr(skb)->tot_len = 0; 453 ip_hdr(skb)->check = 0; 454 tcp_hdr(skb)->check = 455 ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 456 ip_hdr(skb)->daddr, 0, 457 IPPROTO_TCP, 0); 458 } else { 459 ipv6_hdr(skb)->payload_len = 0; 460 tcp_hdr(skb)->check = 461 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 462 &ipv6_hdr(skb)->daddr, 0, 463 IPPROTO_TCP, 0); 464 } 465 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 466 csum_type = mana_checksum_info(skb); 467 468 u64_stats_update_begin(&tx_stats->syncp); 469 tx_stats->csum_partial++; 470 u64_stats_update_end(&tx_stats->syncp); 471 472 if (csum_type == IPPROTO_TCP) { 473 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 474 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 475 476 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 477 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 478 479 } else if (csum_type == IPPROTO_UDP) { 480 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 481 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 482 483 pkg.tx_oob.s_oob.comp_udp_csum = 1; 484 } else { 485 /* Can't do offload of this type of checksum */ 486 if (skb_checksum_help(skb)) 487 goto tx_drop_count; 488 } 489 } 490 491 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { 492 pkg.wqe_req.sgl = pkg.sgl_array; 493 } else { 494 pkg.sgl_ptr = kmalloc_objs(struct gdma_sge, pkg.wqe_req.num_sge, 495 GFP_ATOMIC); 496 if (!pkg.sgl_ptr) 497 goto tx_drop_count; 498 499 pkg.wqe_req.sgl = pkg.sgl_ptr; 500 } 501 502 if (mana_map_skb(skb, apc, &pkg, gso_hs)) { 503 u64_stats_update_begin(&tx_stats->syncp); 504 tx_stats->mana_map_err++; 505 u64_stats_update_end(&tx_stats->syncp); 506 goto free_sgl_ptr; 507 } 508 509 skb_queue_tail(&txq->pending_skbs, skb); 510 511 len = skb->len; 512 num_gso_seg = skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; 513 net_txq = netdev_get_tx_queue(ndev, txq_idx); 514 515 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req, 516 (struct gdma_posted_wqe_info *)skb->cb); 517 if (!mana_can_tx(gdma_sq)) { 518 netif_tx_stop_queue(net_txq); 519 apc->eth_stats.stop_queue++; 520 } 521 522 if (err) { 523 (void)skb_dequeue_tail(&txq->pending_skbs); 524 mana_unmap_skb(skb, apc); 525 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err); 526 goto free_sgl_ptr; 527 } 528 529 err = NETDEV_TX_OK; 530 atomic_inc(&txq->pending_sends); 531 532 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq); 533 534 /* skb may be freed after mana_gd_post_work_request. Do not use it. */ 535 skb = NULL; 536 537 /* Populated the packet and bytes counters based on post GSO packet 538 * calculations 539 */ 540 tx_stats = &txq->stats; 541 u64_stats_update_begin(&tx_stats->syncp); 542 tx_stats->packets += num_gso_seg; 543 tx_stats->bytes += len + ((num_gso_seg - 1) * gso_hs); 544 u64_stats_update_end(&tx_stats->syncp); 545 546 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) { 547 netif_tx_wake_queue(net_txq); 548 apc->eth_stats.wake_queue++; 549 } 550 551 kfree(pkg.sgl_ptr); 552 return err; 553 554 free_sgl_ptr: 555 kfree(pkg.sgl_ptr); 556 tx_drop_count: 557 ndev->stats.tx_dropped++; 558 tx_drop: 559 dev_kfree_skb_any(skb); 560 return NETDEV_TX_OK; 561 } 562 563 #if (MAX_SKB_FRAGS + 2 > MANA_MAX_TX_WQE_SGL_ENTRIES) 564 static netdev_features_t mana_features_check(struct sk_buff *skb, 565 struct net_device *ndev, 566 netdev_features_t features) 567 { 568 if (skb_shinfo(skb)->nr_frags + 2 > MAX_TX_WQE_SGL_ENTRIES) { 569 /* Exceeds HW SGE limit. 570 * GSO case: 571 * Disable GSO so the stack will software-segment the skb 572 * into smaller skbs that fit the SGE budget. 573 * Non-GSO case: 574 * The xmit path will attempt skb_linearize() as a fallback. 575 */ 576 features &= ~NETIF_F_GSO_MASK; 577 } 578 return features; 579 } 580 #endif 581 582 static void mana_get_stats64(struct net_device *ndev, 583 struct rtnl_link_stats64 *st) 584 { 585 struct mana_port_context *apc = netdev_priv(ndev); 586 unsigned int num_queues = apc->num_queues; 587 struct mana_stats_rx *rx_stats; 588 struct mana_stats_tx *tx_stats; 589 unsigned int start; 590 u64 packets, bytes; 591 int q; 592 593 if (!apc->port_is_up) 594 return; 595 596 netdev_stats_to_stats64(st, &ndev->stats); 597 598 if (apc->ac->hwc_timeout_occurred) 599 netdev_warn_once(ndev, "HWC timeout occurred\n"); 600 601 st->rx_missed_errors = apc->ac->hc_stats.hc_rx_discards_no_wqe; 602 603 for (q = 0; q < num_queues; q++) { 604 rx_stats = &apc->rxqs[q]->stats; 605 606 do { 607 start = u64_stats_fetch_begin(&rx_stats->syncp); 608 packets = rx_stats->packets; 609 bytes = rx_stats->bytes; 610 } while (u64_stats_fetch_retry(&rx_stats->syncp, start)); 611 612 st->rx_packets += packets; 613 st->rx_bytes += bytes; 614 } 615 616 for (q = 0; q < num_queues; q++) { 617 tx_stats = &apc->tx_qp[q].txq.stats; 618 619 do { 620 start = u64_stats_fetch_begin(&tx_stats->syncp); 621 packets = tx_stats->packets; 622 bytes = tx_stats->bytes; 623 } while (u64_stats_fetch_retry(&tx_stats->syncp, start)); 624 625 st->tx_packets += packets; 626 st->tx_bytes += bytes; 627 } 628 } 629 630 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb, 631 int old_q) 632 { 633 struct mana_port_context *apc = netdev_priv(ndev); 634 u32 hash = skb_get_hash(skb); 635 struct sock *sk = skb->sk; 636 int txq; 637 638 txq = apc->indir_table[hash & (apc->indir_table_sz - 1)]; 639 640 if (txq != old_q && sk && sk_fullsock(sk) && 641 rcu_access_pointer(sk->sk_dst_cache)) 642 sk_tx_queue_set(sk, txq); 643 644 return txq; 645 } 646 647 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb, 648 struct net_device *sb_dev) 649 { 650 int txq; 651 652 if (ndev->real_num_tx_queues == 1) 653 return 0; 654 655 txq = sk_tx_queue_get(skb->sk); 656 657 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) { 658 if (skb_rx_queue_recorded(skb)) 659 txq = skb_get_rx_queue(skb); 660 else 661 txq = mana_get_tx_queue(ndev, skb, txq); 662 } 663 664 return txq; 665 } 666 667 /* Release pre-allocated RX buffers */ 668 void mana_pre_dealloc_rxbufs(struct mana_port_context *mpc) 669 { 670 struct device *dev; 671 int i; 672 673 dev = mpc->ac->gdma_dev->gdma_context->dev; 674 675 if (!mpc->rxbufs_pre) 676 goto out1; 677 678 if (!mpc->das_pre) 679 goto out2; 680 681 while (mpc->rxbpre_total) { 682 i = --mpc->rxbpre_total; 683 dma_unmap_single(dev, mpc->das_pre[i], mpc->rxbpre_datasize, 684 DMA_FROM_DEVICE); 685 put_page(virt_to_head_page(mpc->rxbufs_pre[i])); 686 } 687 688 kfree(mpc->das_pre); 689 mpc->das_pre = NULL; 690 691 out2: 692 kfree(mpc->rxbufs_pre); 693 mpc->rxbufs_pre = NULL; 694 695 out1: 696 mpc->rxbpre_datasize = 0; 697 mpc->rxbpre_alloc_size = 0; 698 mpc->rxbpre_headroom = 0; 699 } 700 701 /* Get a buffer from the pre-allocated RX buffers */ 702 static void *mana_get_rxbuf_pre(struct mana_rxq *rxq, dma_addr_t *da) 703 { 704 struct net_device *ndev = rxq->ndev; 705 struct mana_port_context *mpc; 706 void *va; 707 708 mpc = netdev_priv(ndev); 709 710 if (!mpc->rxbufs_pre || !mpc->das_pre || !mpc->rxbpre_total) { 711 netdev_err(ndev, "No RX pre-allocated bufs\n"); 712 return NULL; 713 } 714 715 /* Check sizes to catch unexpected coding error */ 716 if (mpc->rxbpre_datasize != rxq->datasize) { 717 netdev_err(ndev, "rxbpre_datasize mismatch: %u: %u\n", 718 mpc->rxbpre_datasize, rxq->datasize); 719 return NULL; 720 } 721 722 if (mpc->rxbpre_alloc_size != rxq->alloc_size) { 723 netdev_err(ndev, "rxbpre_alloc_size mismatch: %u: %u\n", 724 mpc->rxbpre_alloc_size, rxq->alloc_size); 725 return NULL; 726 } 727 728 if (mpc->rxbpre_headroom != rxq->headroom) { 729 netdev_err(ndev, "rxbpre_headroom mismatch: %u: %u\n", 730 mpc->rxbpre_headroom, rxq->headroom); 731 return NULL; 732 } 733 734 mpc->rxbpre_total--; 735 736 *da = mpc->das_pre[mpc->rxbpre_total]; 737 va = mpc->rxbufs_pre[mpc->rxbpre_total]; 738 mpc->rxbufs_pre[mpc->rxbpre_total] = NULL; 739 740 /* Deallocate the array after all buffers are gone */ 741 if (!mpc->rxbpre_total) 742 mana_pre_dealloc_rxbufs(mpc); 743 744 return va; 745 } 746 747 /* Get RX buffer's data size, alloc size, XDP headroom based on MTU */ 748 static void mana_get_rxbuf_cfg(struct mana_port_context *apc, 749 int mtu, u32 *datasize, u32 *alloc_size, 750 u32 *headroom, u32 *frag_count) 751 { 752 u32 len, buf_size; 753 754 /* Calculate datasize first (consistent across all cases) */ 755 *datasize = mtu + ETH_HLEN; 756 757 /* For xdp and jumbo frames make sure only one packet fits per page */ 758 if (mtu + MANA_RXBUF_PAD > PAGE_SIZE / 2 || mana_xdp_get(apc)) { 759 if (mana_xdp_get(apc)) { 760 *headroom = XDP_PACKET_HEADROOM; 761 *alloc_size = PAGE_SIZE; 762 } else { 763 *headroom = 0; /* no support for XDP */ 764 *alloc_size = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD + 765 *headroom); 766 } 767 768 *frag_count = 1; 769 770 /* In the single-buffer path, napi_build_skb() must see the 771 * actual backing allocation size so skb->truesize reflects 772 * the full page (or higher-order page), not just the usable 773 * packet area. 774 */ 775 *alloc_size = PAGE_SIZE << get_order(*alloc_size); 776 return; 777 } 778 779 /* Standard MTU case - optimize for multiple packets per page */ 780 *headroom = 0; 781 782 /* Calculate base buffer size needed */ 783 len = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD + *headroom); 784 buf_size = ALIGN(len, MANA_RX_FRAG_ALIGNMENT); 785 786 /* Calculate how many packets can fit in a page */ 787 *frag_count = PAGE_SIZE / buf_size; 788 *alloc_size = buf_size; 789 } 790 791 int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu, int num_queues) 792 { 793 struct device *dev; 794 struct page *page; 795 dma_addr_t da; 796 int num_rxb; 797 void *va; 798 int i; 799 800 mana_get_rxbuf_cfg(mpc, new_mtu, &mpc->rxbpre_datasize, 801 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom, 802 &mpc->rxbpre_frag_count); 803 804 dev = mpc->ac->gdma_dev->gdma_context->dev; 805 806 num_rxb = num_queues * mpc->rx_queue_size; 807 808 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n"); 809 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL); 810 if (!mpc->rxbufs_pre) 811 goto error; 812 813 mpc->das_pre = kmalloc_objs(dma_addr_t, num_rxb); 814 if (!mpc->das_pre) 815 goto error; 816 817 mpc->rxbpre_total = 0; 818 819 for (i = 0; i < num_rxb; i++) { 820 page = dev_alloc_pages(get_order(mpc->rxbpre_alloc_size)); 821 if (!page) 822 goto error; 823 824 va = page_to_virt(page); 825 826 da = dma_map_single(dev, va + mpc->rxbpre_headroom, 827 mpc->rxbpre_datasize, DMA_FROM_DEVICE); 828 if (dma_mapping_error(dev, da)) { 829 put_page(page); 830 goto error; 831 } 832 833 mpc->rxbufs_pre[i] = va; 834 mpc->das_pre[i] = da; 835 mpc->rxbpre_total = i + 1; 836 } 837 838 return 0; 839 840 error: 841 netdev_err(mpc->ndev, "Failed to pre-allocate RX buffers for %d queues\n", num_queues); 842 mana_pre_dealloc_rxbufs(mpc); 843 return -ENOMEM; 844 } 845 846 static int mana_change_mtu(struct net_device *ndev, int new_mtu) 847 { 848 struct mana_port_context *mpc = netdev_priv(ndev); 849 unsigned int old_mtu = ndev->mtu; 850 int err; 851 852 /* Pre-allocate buffers to prevent failure in mana_attach later */ 853 err = mana_pre_alloc_rxbufs(mpc, new_mtu, mpc->num_queues); 854 if (err) { 855 netdev_err(ndev, "Insufficient memory for new MTU\n"); 856 return err; 857 } 858 859 err = mana_detach(ndev, false); 860 if (err) { 861 netdev_err(ndev, "mana_detach failed: %d\n", err); 862 goto out; 863 } 864 865 WRITE_ONCE(ndev->mtu, new_mtu); 866 867 err = mana_attach(ndev); 868 if (err) { 869 netdev_err(ndev, "mana_attach failed: %d\n", err); 870 WRITE_ONCE(ndev->mtu, old_mtu); 871 } 872 873 out: 874 mana_pre_dealloc_rxbufs(mpc); 875 return err; 876 } 877 878 static void mana_tx_timeout(struct net_device *netdev, unsigned int txqueue) 879 { 880 struct mana_port_context *apc = netdev_priv(netdev); 881 struct mana_context *ac = apc->ac; 882 struct gdma_context *gc = ac->gdma_dev->gdma_context; 883 884 /* Already in service, hence tx queue reset is not required.*/ 885 if (gc->in_service) 886 return; 887 888 /* Note: If there are pending queue reset work for this port(apc), 889 * subsequent request queued up from here are ignored. This is because 890 * we are using the same work instance per port(apc). 891 */ 892 queue_work(ac->per_port_queue_reset_wq, &apc->queue_reset_work); 893 } 894 895 static int mana_shaper_set(struct net_shaper_binding *binding, 896 const struct net_shaper *shaper, 897 struct netlink_ext_ack *extack) 898 { 899 struct mana_port_context *apc = netdev_priv(binding->netdev); 900 u32 old_speed, rate; 901 int err; 902 903 if (shaper->handle.scope != NET_SHAPER_SCOPE_NETDEV) { 904 NL_SET_ERR_MSG_MOD(extack, "net shaper scope should be netdev"); 905 return -EINVAL; 906 } 907 908 if (apc->handle.id && shaper->handle.id != apc->handle.id) { 909 NL_SET_ERR_MSG_MOD(extack, "Cannot create multiple shapers"); 910 return -EOPNOTSUPP; 911 } 912 913 if (!shaper->bw_max || (shaper->bw_max % 100000000)) { 914 NL_SET_ERR_MSG_MOD(extack, "Please use multiples of 100Mbps for bandwidth"); 915 return -EINVAL; 916 } 917 918 rate = div_u64(shaper->bw_max, 1000); /* Convert bps to Kbps */ 919 rate = div_u64(rate, 1000); /* Convert Kbps to Mbps */ 920 921 /* Get current speed */ 922 err = mana_query_link_cfg(apc); 923 old_speed = (err) ? SPEED_UNKNOWN : apc->speed; 924 925 if (!err) { 926 err = mana_set_bw_clamp(apc, rate, TRI_STATE_TRUE); 927 apc->speed = (err) ? old_speed : rate; 928 apc->handle = (err) ? apc->handle : shaper->handle; 929 } 930 931 return err; 932 } 933 934 static int mana_shaper_del(struct net_shaper_binding *binding, 935 const struct net_shaper_handle *handle, 936 struct netlink_ext_ack *extack) 937 { 938 struct mana_port_context *apc = netdev_priv(binding->netdev); 939 int err; 940 941 err = mana_set_bw_clamp(apc, 0, TRI_STATE_FALSE); 942 943 if (!err) { 944 /* Reset mana port context parameters */ 945 apc->handle.id = 0; 946 apc->handle.scope = NET_SHAPER_SCOPE_UNSPEC; 947 apc->speed = apc->max_speed; 948 } 949 950 return err; 951 } 952 953 static void mana_shaper_cap(struct net_shaper_binding *binding, 954 enum net_shaper_scope scope, 955 unsigned long *flags) 956 { 957 *flags = BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MAX) | 958 BIT(NET_SHAPER_A_CAPS_SUPPORT_METRIC_BPS); 959 } 960 961 static const struct net_shaper_ops mana_shaper_ops = { 962 .set = mana_shaper_set, 963 .delete = mana_shaper_del, 964 .capabilities = mana_shaper_cap, 965 }; 966 967 static const struct net_device_ops mana_devops = { 968 .ndo_open = mana_open, 969 .ndo_stop = mana_close, 970 .ndo_select_queue = mana_select_queue, 971 #if (MAX_SKB_FRAGS + 2 > MANA_MAX_TX_WQE_SGL_ENTRIES) 972 .ndo_features_check = mana_features_check, 973 #endif 974 .ndo_start_xmit = mana_start_xmit, 975 .ndo_validate_addr = eth_validate_addr, 976 .ndo_get_stats64 = mana_get_stats64, 977 .ndo_bpf = mana_bpf, 978 .ndo_xdp_xmit = mana_xdp_xmit, 979 .ndo_change_mtu = mana_change_mtu, 980 .ndo_tx_timeout = mana_tx_timeout, 981 .net_shaper_ops = &mana_shaper_ops, 982 }; 983 984 static void mana_cleanup_port_context(struct mana_port_context *apc) 985 { 986 /* 987 * make sure subsequent cleanup attempts don't end up removing already 988 * cleaned dentry pointer 989 */ 990 debugfs_remove(apc->mana_port_debugfs); 991 apc->mana_port_debugfs = NULL; 992 kfree(apc->rxqs); 993 apc->rxqs = NULL; 994 } 995 996 static void mana_cleanup_indir_table(struct mana_port_context *apc) 997 { 998 apc->indir_table_sz = 0; 999 kfree(apc->indir_table); 1000 kfree(apc->rxobj_table); 1001 } 1002 1003 static int mana_init_port_context(struct mana_port_context *apc) 1004 { 1005 apc->rxqs = kzalloc_objs(struct mana_rxq *, apc->num_queues); 1006 1007 return !apc->rxqs ? -ENOMEM : 0; 1008 } 1009 1010 static int mana_send_request(struct mana_context *ac, void *in_buf, 1011 u32 in_len, void *out_buf, u32 out_len) 1012 { 1013 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1014 struct gdma_resp_hdr *resp = out_buf; 1015 struct gdma_req_hdr *req = in_buf; 1016 struct device *dev = gc->dev; 1017 static atomic_t activity_id; 1018 int err; 1019 1020 req->dev_id = gc->mana.dev_id; 1021 req->activity_id = atomic_inc_return(&activity_id); 1022 1023 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 1024 out_buf); 1025 if (err || resp->status) { 1026 if (err == -EOPNOTSUPP) 1027 return err; 1028 1029 if (req->req.msg_type != MANA_QUERY_PHY_STAT && 1030 mana_need_log(gc, err)) 1031 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 1032 err, resp->status); 1033 return err ? err : -EPROTO; 1034 } 1035 1036 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 1037 req->activity_id != resp->activity_id) { 1038 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 1039 req->dev_id.as_uint32, resp->dev_id.as_uint32, 1040 req->activity_id, resp->activity_id); 1041 return -EPROTO; 1042 } 1043 1044 return 0; 1045 } 1046 1047 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 1048 const enum mana_command_code expected_code, 1049 const u32 min_size) 1050 { 1051 if (resp_hdr->response.msg_type != expected_code) 1052 return -EPROTO; 1053 1054 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 1055 return -EPROTO; 1056 1057 if (resp_hdr->response.msg_size < min_size) 1058 return -EPROTO; 1059 1060 return 0; 1061 } 1062 1063 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 1064 { 1065 struct mana_register_hw_vport_resp resp = {}; 1066 struct mana_register_hw_vport_req req = {}; 1067 int err; 1068 1069 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 1070 sizeof(req), sizeof(resp)); 1071 req.attached_gfid = 1; 1072 req.is_pf_default_vport = 1; 1073 req.allow_all_ether_types = 1; 1074 1075 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1076 sizeof(resp)); 1077 if (err) { 1078 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 1079 return err; 1080 } 1081 1082 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 1083 sizeof(resp)); 1084 if (err || resp.hdr.status) { 1085 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 1086 err, resp.hdr.status); 1087 return err ? err : -EPROTO; 1088 } 1089 1090 apc->port_handle = resp.hw_vport_handle; 1091 return 0; 1092 } 1093 1094 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 1095 { 1096 struct mana_deregister_hw_vport_resp resp = {}; 1097 struct mana_deregister_hw_vport_req req = {}; 1098 int err; 1099 1100 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 1101 sizeof(req), sizeof(resp)); 1102 req.hw_vport_handle = apc->port_handle; 1103 1104 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1105 sizeof(resp)); 1106 if (err) { 1107 if (mana_en_need_log(apc, err)) 1108 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 1109 err); 1110 1111 return; 1112 } 1113 1114 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 1115 sizeof(resp)); 1116 if (err || resp.hdr.status) 1117 netdev_err(apc->ndev, 1118 "Failed to deregister hw vPort: %d, 0x%x\n", 1119 err, resp.hdr.status); 1120 } 1121 1122 static int mana_pf_register_filter(struct mana_port_context *apc) 1123 { 1124 struct mana_register_filter_resp resp = {}; 1125 struct mana_register_filter_req req = {}; 1126 int err; 1127 1128 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 1129 sizeof(req), sizeof(resp)); 1130 req.vport = apc->port_handle; 1131 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 1132 1133 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1134 sizeof(resp)); 1135 if (err) { 1136 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 1137 return err; 1138 } 1139 1140 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 1141 sizeof(resp)); 1142 if (err || resp.hdr.status) { 1143 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 1144 err, resp.hdr.status); 1145 return err ? err : -EPROTO; 1146 } 1147 1148 apc->pf_filter_handle = resp.filter_handle; 1149 return 0; 1150 } 1151 1152 static void mana_pf_deregister_filter(struct mana_port_context *apc) 1153 { 1154 struct mana_deregister_filter_resp resp = {}; 1155 struct mana_deregister_filter_req req = {}; 1156 int err; 1157 1158 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 1159 sizeof(req), sizeof(resp)); 1160 req.filter_handle = apc->pf_filter_handle; 1161 1162 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1163 sizeof(resp)); 1164 if (err) { 1165 if (mana_en_need_log(apc, err)) 1166 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 1167 err); 1168 1169 return; 1170 } 1171 1172 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 1173 sizeof(resp)); 1174 if (err || resp.hdr.status) 1175 netdev_err(apc->ndev, 1176 "Failed to deregister filter: %d, 0x%x\n", 1177 err, resp.hdr.status); 1178 } 1179 1180 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 1181 u32 proto_minor_ver, u32 proto_micro_ver, 1182 u16 *max_num_vports, u8 *bm_hostmode) 1183 { 1184 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1185 struct mana_query_device_cfg_resp resp = {}; 1186 struct mana_query_device_cfg_req req = {}; 1187 struct device *dev = gc->dev; 1188 int err = 0; 1189 1190 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 1191 sizeof(req), sizeof(resp)); 1192 1193 req.hdr.resp.msg_version = GDMA_MESSAGE_V3; 1194 1195 req.proto_major_ver = proto_major_ver; 1196 req.proto_minor_ver = proto_minor_ver; 1197 req.proto_micro_ver = proto_micro_ver; 1198 1199 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 1200 if (err) { 1201 dev_err(dev, "Failed to query config: %d", err); 1202 return err; 1203 } 1204 1205 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 1206 sizeof(resp)); 1207 if (err || resp.hdr.status) { 1208 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 1209 resp.hdr.status); 1210 if (!err) 1211 err = -EPROTO; 1212 return err; 1213 } 1214 1215 *max_num_vports = resp.max_num_vports; 1216 1217 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V2) 1218 gc->adapter_mtu = resp.adapter_mtu; 1219 else 1220 gc->adapter_mtu = ETH_FRAME_LEN; 1221 1222 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V3) 1223 *bm_hostmode = resp.bm_hostmode; 1224 else 1225 *bm_hostmode = 0; 1226 1227 debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc->adapter_mtu); 1228 1229 return 0; 1230 } 1231 1232 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 1233 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 1234 { 1235 struct mana_query_vport_cfg_resp resp = {}; 1236 struct mana_query_vport_cfg_req req = {}; 1237 int err; 1238 1239 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 1240 sizeof(req), sizeof(resp)); 1241 1242 req.vport_index = vport_index; 1243 1244 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1245 sizeof(resp)); 1246 if (err) 1247 return err; 1248 1249 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 1250 sizeof(resp)); 1251 if (err) 1252 return err; 1253 1254 if (resp.hdr.status) 1255 return -EPROTO; 1256 1257 *max_sq = resp.max_num_sq; 1258 *max_rq = resp.max_num_rq; 1259 if (resp.num_indirection_ent > 0 && 1260 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE && 1261 is_power_of_2(resp.num_indirection_ent)) { 1262 *num_indir_entry = resp.num_indirection_ent; 1263 } else { 1264 netdev_warn(apc->ndev, 1265 "Setting indirection table size to default %d for vPort %d\n", 1266 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx); 1267 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE; 1268 } 1269 1270 apc->port_handle = resp.vport; 1271 ether_addr_copy(apc->mac_addr, resp.mac_addr); 1272 1273 return 0; 1274 } 1275 1276 void mana_uncfg_vport(struct mana_port_context *apc) 1277 { 1278 mutex_lock(&apc->vport_mutex); 1279 apc->vport_use_count--; 1280 WARN_ON(apc->vport_use_count < 0); 1281 mutex_unlock(&apc->vport_mutex); 1282 } 1283 EXPORT_SYMBOL_NS(mana_uncfg_vport, "NET_MANA"); 1284 1285 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 1286 u32 doorbell_pg_id) 1287 { 1288 struct mana_config_vport_resp resp = {}; 1289 struct mana_config_vport_req req = {}; 1290 int err; 1291 1292 /* This function is used to program the Ethernet port in the hardware 1293 * table. It can be called from the Ethernet driver or the RDMA driver. 1294 * 1295 * For Ethernet usage, the hardware supports only one active user on a 1296 * physical port. The driver checks on the port usage before programming 1297 * the hardware when creating the RAW QP (RDMA driver) or exposing the 1298 * device to kernel NET layer (Ethernet driver). 1299 * 1300 * Because the RDMA driver doesn't know in advance which QP type the 1301 * user will create, it exposes the device with all its ports. The user 1302 * may not be able to create RAW QP on a port if this port is already 1303 * in used by the Ethernet driver from the kernel. 1304 * 1305 * This physical port limitation only applies to the RAW QP. For RC QP, 1306 * the hardware doesn't have this limitation. The user can create RC 1307 * QPs on a physical port up to the hardware limits independent of the 1308 * Ethernet usage on the same port. 1309 */ 1310 mutex_lock(&apc->vport_mutex); 1311 if (apc->vport_use_count > 0) { 1312 mutex_unlock(&apc->vport_mutex); 1313 return -EBUSY; 1314 } 1315 apc->vport_use_count++; 1316 mutex_unlock(&apc->vport_mutex); 1317 1318 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1319 sizeof(req), sizeof(resp)); 1320 req.vport = apc->port_handle; 1321 req.pdid = protection_dom_id; 1322 req.doorbell_pageid = doorbell_pg_id; 1323 1324 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1325 sizeof(resp)); 1326 if (err) { 1327 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1328 goto out; 1329 } 1330 1331 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1332 sizeof(resp)); 1333 if (err || resp.hdr.status) { 1334 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1335 err, resp.hdr.status); 1336 if (!err) 1337 err = -EPROTO; 1338 1339 goto out; 1340 } 1341 1342 apc->tx_shortform_allowed = resp.short_form_allowed; 1343 apc->tx_vp_offset = resp.tx_vport_offset; 1344 1345 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 1346 apc->port_handle, protection_dom_id, doorbell_pg_id); 1347 out: 1348 if (err) 1349 mana_uncfg_vport(apc); 1350 1351 return err; 1352 } 1353 EXPORT_SYMBOL_NS(mana_cfg_vport, "NET_MANA"); 1354 1355 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1356 enum TRI_STATE rx, 1357 bool update_default_rxobj, bool update_key, 1358 bool update_tab) 1359 { 1360 struct mana_cfg_rx_steer_req_v2 *req; 1361 struct mana_cfg_rx_steer_resp resp = {}; 1362 struct net_device *ndev = apc->ndev; 1363 u32 req_buf_size; 1364 int err; 1365 1366 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz); 1367 req = kzalloc(req_buf_size, GFP_KERNEL); 1368 if (!req) 1369 return -ENOMEM; 1370 1371 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1372 sizeof(resp)); 1373 1374 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1375 1376 req->vport = apc->port_handle; 1377 req->num_indir_entries = apc->indir_table_sz; 1378 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, 1379 indir_tab); 1380 req->rx_enable = rx; 1381 req->rss_enable = apc->rss_state; 1382 req->update_default_rxobj = update_default_rxobj; 1383 req->update_hashkey = update_key; 1384 req->update_indir_tab = update_tab; 1385 req->default_rxobj = apc->default_rxobj; 1386 req->cqe_coalescing_enable = 0; 1387 1388 if (update_key) 1389 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1390 1391 if (update_tab) 1392 memcpy(req->indir_tab, apc->rxobj_table, 1393 flex_array_size(req, indir_tab, req->num_indir_entries)); 1394 1395 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1396 sizeof(resp)); 1397 if (err) { 1398 if (mana_en_need_log(apc, err)) 1399 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1400 1401 goto out; 1402 } 1403 1404 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1405 sizeof(resp)); 1406 if (err) { 1407 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1408 goto out; 1409 } 1410 1411 if (resp.hdr.status) { 1412 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1413 resp.hdr.status); 1414 err = -EPROTO; 1415 } 1416 1417 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1418 apc->port_handle, apc->indir_table_sz); 1419 out: 1420 kfree(req); 1421 return err; 1422 } 1423 1424 int mana_query_link_cfg(struct mana_port_context *apc) 1425 { 1426 struct net_device *ndev = apc->ndev; 1427 struct mana_query_link_config_resp resp = {}; 1428 struct mana_query_link_config_req req = {}; 1429 int err; 1430 1431 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_LINK_CONFIG, 1432 sizeof(req), sizeof(resp)); 1433 1434 req.vport = apc->port_handle; 1435 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 1436 1437 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1438 sizeof(resp)); 1439 1440 if (err) { 1441 if (err == -EOPNOTSUPP) { 1442 netdev_info_once(ndev, "MANA_QUERY_LINK_CONFIG not supported\n"); 1443 return err; 1444 } 1445 netdev_err(ndev, "Failed to query link config: %d\n", err); 1446 return err; 1447 } 1448 1449 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_LINK_CONFIG, 1450 sizeof(resp)); 1451 1452 if (err || resp.hdr.status) { 1453 netdev_err(ndev, "Failed to query link config: %d, 0x%x\n", err, 1454 resp.hdr.status); 1455 if (!err) 1456 err = -EOPNOTSUPP; 1457 return err; 1458 } 1459 1460 if (resp.qos_unconfigured) { 1461 err = -EINVAL; 1462 return err; 1463 } 1464 apc->speed = resp.link_speed_mbps; 1465 apc->max_speed = resp.qos_speed_mbps; 1466 return 0; 1467 } 1468 1469 int mana_set_bw_clamp(struct mana_port_context *apc, u32 speed, 1470 int enable_clamping) 1471 { 1472 struct mana_set_bw_clamp_resp resp = {}; 1473 struct mana_set_bw_clamp_req req = {}; 1474 struct net_device *ndev = apc->ndev; 1475 int err; 1476 1477 mana_gd_init_req_hdr(&req.hdr, MANA_SET_BW_CLAMP, 1478 sizeof(req), sizeof(resp)); 1479 req.vport = apc->port_handle; 1480 req.link_speed_mbps = speed; 1481 req.enable_clamping = enable_clamping; 1482 1483 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1484 sizeof(resp)); 1485 1486 if (err) { 1487 if (err == -EOPNOTSUPP) { 1488 netdev_info_once(ndev, "MANA_SET_BW_CLAMP not supported\n"); 1489 return err; 1490 } 1491 netdev_err(ndev, "Failed to set bandwidth clamp for speed %u, err = %d", 1492 speed, err); 1493 return err; 1494 } 1495 1496 err = mana_verify_resp_hdr(&resp.hdr, MANA_SET_BW_CLAMP, 1497 sizeof(resp)); 1498 1499 if (err || resp.hdr.status) { 1500 netdev_err(ndev, "Failed to set bandwidth clamp: %d, 0x%x\n", err, 1501 resp.hdr.status); 1502 if (!err) 1503 err = -EOPNOTSUPP; 1504 return err; 1505 } 1506 1507 if (resp.qos_unconfigured) 1508 netdev_info(ndev, "QoS is unconfigured\n"); 1509 1510 return 0; 1511 } 1512 1513 int mana_create_wq_obj(struct mana_port_context *apc, 1514 mana_handle_t vport, 1515 u32 wq_type, struct mana_obj_spec *wq_spec, 1516 struct mana_obj_spec *cq_spec, 1517 mana_handle_t *wq_obj) 1518 { 1519 struct mana_create_wqobj_resp resp = {}; 1520 struct mana_create_wqobj_req req = {}; 1521 struct net_device *ndev = apc->ndev; 1522 int err; 1523 1524 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1525 sizeof(req), sizeof(resp)); 1526 req.vport = vport; 1527 req.wq_type = wq_type; 1528 req.wq_gdma_region = wq_spec->gdma_region; 1529 req.cq_gdma_region = cq_spec->gdma_region; 1530 req.wq_size = wq_spec->queue_size; 1531 req.cq_size = cq_spec->queue_size; 1532 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1533 req.cq_parent_qid = cq_spec->attached_eq; 1534 1535 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1536 sizeof(resp)); 1537 if (err) { 1538 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1539 goto out; 1540 } 1541 1542 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1543 sizeof(resp)); 1544 if (err || resp.hdr.status) { 1545 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1546 resp.hdr.status); 1547 if (!err) 1548 err = -EPROTO; 1549 goto out; 1550 } 1551 1552 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1553 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1554 err = -EPROTO; 1555 goto out; 1556 } 1557 1558 *wq_obj = resp.wq_obj; 1559 wq_spec->queue_index = resp.wq_id; 1560 cq_spec->queue_index = resp.cq_id; 1561 1562 return 0; 1563 out: 1564 return err; 1565 } 1566 EXPORT_SYMBOL_NS(mana_create_wq_obj, "NET_MANA"); 1567 1568 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1569 mana_handle_t wq_obj) 1570 { 1571 struct mana_destroy_wqobj_resp resp = {}; 1572 struct mana_destroy_wqobj_req req = {}; 1573 struct net_device *ndev = apc->ndev; 1574 int err; 1575 1576 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1577 sizeof(req), sizeof(resp)); 1578 req.wq_type = wq_type; 1579 req.wq_obj_handle = wq_obj; 1580 1581 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1582 sizeof(resp)); 1583 if (err) { 1584 if (mana_en_need_log(apc, err)) 1585 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1586 1587 return; 1588 } 1589 1590 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1591 sizeof(resp)); 1592 if (err || resp.hdr.status) 1593 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1594 resp.hdr.status); 1595 } 1596 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, "NET_MANA"); 1597 1598 static void mana_destroy_eq(struct mana_context *ac) 1599 { 1600 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1601 struct gdma_queue *eq; 1602 int i; 1603 1604 if (!ac->eqs) 1605 return; 1606 1607 debugfs_remove_recursive(ac->mana_eqs_debugfs); 1608 ac->mana_eqs_debugfs = NULL; 1609 1610 for (i = 0; i < gc->max_num_queues; i++) { 1611 eq = ac->eqs[i].eq; 1612 if (!eq) 1613 continue; 1614 1615 mana_gd_destroy_queue(gc, eq); 1616 } 1617 1618 kfree(ac->eqs); 1619 ac->eqs = NULL; 1620 } 1621 1622 static void mana_create_eq_debugfs(struct mana_context *ac, int i) 1623 { 1624 struct mana_eq eq = ac->eqs[i]; 1625 char eqnum[32]; 1626 1627 sprintf(eqnum, "eq%d", i); 1628 eq.mana_eq_debugfs = debugfs_create_dir(eqnum, ac->mana_eqs_debugfs); 1629 debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head); 1630 debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail); 1631 debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops); 1632 } 1633 1634 static int mana_create_eq(struct mana_context *ac) 1635 { 1636 struct gdma_dev *gd = ac->gdma_dev; 1637 struct gdma_context *gc = gd->gdma_context; 1638 struct gdma_queue_spec spec = {}; 1639 int err; 1640 int i; 1641 1642 ac->eqs = kzalloc_objs(struct mana_eq, gc->max_num_queues); 1643 if (!ac->eqs) 1644 return -ENOMEM; 1645 1646 spec.type = GDMA_EQ; 1647 spec.monitor_avl_buf = false; 1648 spec.queue_size = EQ_SIZE; 1649 spec.eq.callback = NULL; 1650 spec.eq.context = ac->eqs; 1651 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1652 1653 ac->mana_eqs_debugfs = debugfs_create_dir("EQs", gc->mana_pci_debugfs); 1654 1655 for (i = 0; i < gc->max_num_queues; i++) { 1656 spec.eq.msix_index = (i + 1) % gc->num_msix_usable; 1657 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1658 if (err) { 1659 dev_err(gc->dev, "Failed to create EQ %d : %d\n", i, err); 1660 goto out; 1661 } 1662 mana_create_eq_debugfs(ac, i); 1663 } 1664 1665 return 0; 1666 out: 1667 mana_destroy_eq(ac); 1668 return err; 1669 } 1670 1671 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1672 { 1673 struct mana_fence_rq_resp resp = {}; 1674 struct mana_fence_rq_req req = {}; 1675 int err; 1676 1677 init_completion(&rxq->fence_event); 1678 1679 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1680 sizeof(req), sizeof(resp)); 1681 req.wq_obj_handle = rxq->rxobj; 1682 1683 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1684 sizeof(resp)); 1685 if (err) { 1686 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1687 rxq->rxq_idx, err); 1688 return err; 1689 } 1690 1691 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1692 if (err || resp.hdr.status) { 1693 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1694 rxq->rxq_idx, err, resp.hdr.status); 1695 if (!err) 1696 err = -EPROTO; 1697 1698 return err; 1699 } 1700 1701 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1702 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1703 rxq->rxq_idx); 1704 return -ETIMEDOUT; 1705 } 1706 1707 return 0; 1708 } 1709 1710 static void mana_fence_rqs(struct mana_port_context *apc) 1711 { 1712 unsigned int rxq_idx; 1713 struct mana_rxq *rxq; 1714 int err; 1715 1716 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1717 rxq = apc->rxqs[rxq_idx]; 1718 err = mana_fence_rq(apc, rxq); 1719 1720 /* In case of any error, use sleep instead. */ 1721 if (err) 1722 msleep(100); 1723 } 1724 } 1725 1726 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1727 { 1728 u32 used_space_old; 1729 u32 used_space_new; 1730 1731 used_space_old = wq->head - wq->tail; 1732 used_space_new = wq->head - (wq->tail + num_units); 1733 1734 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1735 return -ERANGE; 1736 1737 wq->tail += num_units; 1738 return 0; 1739 } 1740 1741 void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1742 { 1743 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1744 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1745 struct device *dev = gc->dev; 1746 int hsg, i; 1747 1748 /* Number of SGEs of linear part */ 1749 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1750 1751 for (i = 0; i < hsg; i++) 1752 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1753 DMA_TO_DEVICE); 1754 1755 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1756 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1757 DMA_TO_DEVICE); 1758 } 1759 1760 static void mana_poll_tx_cq(struct mana_cq *cq) 1761 { 1762 struct gdma_comp *completions = cq->gdma_comp_buf; 1763 struct gdma_posted_wqe_info *wqe_info; 1764 unsigned int pkt_transmitted = 0; 1765 unsigned int wqe_unit_cnt = 0; 1766 struct mana_txq *txq = cq->txq; 1767 struct mana_port_context *apc; 1768 struct netdev_queue *net_txq; 1769 struct gdma_queue *gdma_wq; 1770 unsigned int avail_space; 1771 struct net_device *ndev; 1772 struct sk_buff *skb; 1773 bool txq_stopped; 1774 int comp_read; 1775 int i; 1776 1777 ndev = txq->ndev; 1778 apc = netdev_priv(ndev); 1779 1780 /* Limit CQEs polled to 4 wraparounds of the CQ to ensure the 1781 * doorbell can be rung in time for the hardware's requirement 1782 * of at least one doorbell ring every 8 wraparounds. 1783 */ 1784 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1785 min((cq->gdma_cq->queue_size / 1786 COMP_ENTRY_SIZE) * 4, 1787 CQE_POLLING_BUFFER)); 1788 1789 if (comp_read < 1) 1790 return; 1791 1792 for (i = 0; i < comp_read; i++) { 1793 struct mana_tx_comp_oob *cqe_oob; 1794 1795 if (WARN_ON_ONCE(!completions[i].is_sq)) 1796 return; 1797 1798 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1799 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1800 MANA_CQE_COMPLETION)) 1801 return; 1802 1803 switch (cqe_oob->cqe_hdr.cqe_type) { 1804 case CQE_TX_OKAY: 1805 break; 1806 1807 case CQE_TX_SA_DROP: 1808 case CQE_TX_MTU_DROP: 1809 case CQE_TX_INVALID_OOB: 1810 case CQE_TX_INVALID_ETH_TYPE: 1811 case CQE_TX_HDR_PROCESSING_ERROR: 1812 case CQE_TX_VF_DISABLED: 1813 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1814 case CQE_TX_VPORT_DISABLED: 1815 case CQE_TX_VLAN_TAGGING_VIOLATION: 1816 if (net_ratelimit()) 1817 netdev_err(ndev, "TX: CQE error %d\n", 1818 cqe_oob->cqe_hdr.cqe_type); 1819 1820 apc->eth_stats.tx_cqe_err++; 1821 break; 1822 1823 default: 1824 /* If the CQE type is unknown, log an error, 1825 * and still free the SKB, update tail, etc. 1826 */ 1827 if (net_ratelimit()) 1828 netdev_err(ndev, "TX: unknown CQE type %d\n", 1829 cqe_oob->cqe_hdr.cqe_type); 1830 1831 apc->eth_stats.tx_cqe_unknown_type++; 1832 break; 1833 } 1834 1835 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1836 return; 1837 1838 skb = skb_dequeue(&txq->pending_skbs); 1839 if (WARN_ON_ONCE(!skb)) 1840 return; 1841 1842 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1843 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1844 1845 mana_unmap_skb(skb, apc); 1846 1847 napi_consume_skb(skb, cq->budget); 1848 1849 pkt_transmitted++; 1850 } 1851 1852 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1853 return; 1854 1855 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1856 1857 gdma_wq = txq->gdma_sq; 1858 avail_space = mana_gd_wq_avail_space(gdma_wq); 1859 1860 /* Ensure tail updated before checking q stop */ 1861 smp_mb(); 1862 1863 net_txq = txq->net_txq; 1864 txq_stopped = netif_tx_queue_stopped(net_txq); 1865 1866 /* Ensure checking txq_stopped before apc->port_is_up. */ 1867 smp_rmb(); 1868 1869 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1870 netif_tx_wake_queue(net_txq); 1871 apc->eth_stats.wake_queue++; 1872 } 1873 1874 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1875 WARN_ON_ONCE(1); 1876 1877 cq->work_done = pkt_transmitted; 1878 } 1879 1880 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1881 { 1882 struct mana_recv_buf_oob *recv_buf_oob; 1883 u32 curr_index; 1884 int err; 1885 1886 curr_index = rxq->buf_index++; 1887 if (rxq->buf_index == rxq->num_rx_buf) 1888 rxq->buf_index = 0; 1889 1890 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1891 1892 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1893 &recv_buf_oob->wqe_inf); 1894 if (WARN_ON_ONCE(err)) 1895 return; 1896 1897 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1898 } 1899 1900 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1901 uint pkt_len, struct xdp_buff *xdp) 1902 { 1903 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1904 1905 if (!skb) 1906 return NULL; 1907 1908 if (xdp->data_hard_start) { 1909 u32 metasize = xdp->data - xdp->data_meta; 1910 1911 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1912 skb_put(skb, xdp->data_end - xdp->data); 1913 if (metasize) 1914 skb_metadata_set(skb, metasize); 1915 return skb; 1916 } 1917 1918 skb_reserve(skb, rxq->headroom); 1919 skb_put(skb, pkt_len); 1920 1921 return skb; 1922 } 1923 1924 static void mana_rx_skb(void *buf_va, bool from_pool, 1925 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) 1926 { 1927 struct mana_stats_rx *rx_stats = &rxq->stats; 1928 struct net_device *ndev = rxq->ndev; 1929 uint pkt_len = cqe->ppi[0].pkt_len; 1930 u16 rxq_idx = rxq->rxq_idx; 1931 struct napi_struct *napi; 1932 struct xdp_buff xdp = {}; 1933 struct sk_buff *skb; 1934 u32 hash_value; 1935 u32 act; 1936 1937 rxq->rx_cq.work_done++; 1938 napi = &rxq->rx_cq.napi; 1939 1940 if (!buf_va) { 1941 ++ndev->stats.rx_dropped; 1942 return; 1943 } 1944 1945 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1946 1947 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1948 return; 1949 1950 if (act != XDP_PASS && act != XDP_TX) 1951 goto drop_xdp; 1952 1953 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1954 1955 if (!skb) 1956 goto drop; 1957 1958 if (from_pool) 1959 skb_mark_for_recycle(skb); 1960 1961 skb->dev = napi->dev; 1962 1963 skb->protocol = eth_type_trans(skb, ndev); 1964 skb_checksum_none_assert(skb); 1965 skb_record_rx_queue(skb, rxq_idx); 1966 1967 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1968 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1969 skb->ip_summed = CHECKSUM_UNNECESSARY; 1970 } 1971 1972 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1973 hash_value = cqe->ppi[0].pkt_hash; 1974 1975 if (cqe->rx_hashtype & MANA_HASH_L4) 1976 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1977 else 1978 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1979 } 1980 1981 if (cqe->rx_vlantag_present) { 1982 u16 vlan_tci = cqe->rx_vlan_id; 1983 1984 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1985 } 1986 1987 u64_stats_update_begin(&rx_stats->syncp); 1988 rx_stats->packets++; 1989 rx_stats->bytes += pkt_len; 1990 1991 if (act == XDP_TX) 1992 rx_stats->xdp_tx++; 1993 u64_stats_update_end(&rx_stats->syncp); 1994 1995 if (act == XDP_TX) { 1996 skb_set_queue_mapping(skb, rxq_idx); 1997 mana_xdp_tx(skb, ndev); 1998 return; 1999 } 2000 2001 napi_gro_receive(napi, skb); 2002 2003 return; 2004 2005 drop_xdp: 2006 u64_stats_update_begin(&rx_stats->syncp); 2007 rx_stats->xdp_drop++; 2008 u64_stats_update_end(&rx_stats->syncp); 2009 2010 drop: 2011 if (from_pool) { 2012 if (rxq->frag_count == 1) 2013 page_pool_recycle_direct(rxq->page_pool, 2014 virt_to_head_page(buf_va)); 2015 else 2016 page_pool_free_va(rxq->page_pool, buf_va, true); 2017 } else { 2018 WARN_ON_ONCE(rxq->xdp_save_va); 2019 /* Save for reuse */ 2020 rxq->xdp_save_va = buf_va; 2021 } 2022 2023 ++ndev->stats.rx_dropped; 2024 2025 return; 2026 } 2027 2028 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 2029 dma_addr_t *da, bool *from_pool) 2030 { 2031 struct page *page; 2032 u32 offset; 2033 void *va; 2034 *from_pool = false; 2035 2036 /* Don't use fragments for jumbo frames or XDP where it's 1 fragment 2037 * per page. 2038 */ 2039 if (rxq->frag_count == 1) { 2040 /* Reuse XDP dropped page if available */ 2041 if (rxq->xdp_save_va) { 2042 va = rxq->xdp_save_va; 2043 page = virt_to_head_page(va); 2044 rxq->xdp_save_va = NULL; 2045 } else { 2046 page = page_pool_dev_alloc_pages(rxq->page_pool); 2047 if (!page) 2048 return NULL; 2049 2050 *from_pool = true; 2051 va = page_to_virt(page); 2052 } 2053 2054 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 2055 DMA_FROM_DEVICE); 2056 if (dma_mapping_error(dev, *da)) { 2057 mana_put_rx_page(rxq, page, *from_pool); 2058 return NULL; 2059 } 2060 2061 return va; 2062 } 2063 2064 page = page_pool_dev_alloc_frag(rxq->page_pool, &offset, 2065 rxq->alloc_size); 2066 if (!page) 2067 return NULL; 2068 2069 va = page_to_virt(page) + offset; 2070 *da = page_pool_get_dma_addr(page) + offset + rxq->headroom; 2071 *from_pool = true; 2072 2073 return va; 2074 } 2075 2076 /* Allocate frag for rx buffer, and save the old buf */ 2077 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 2078 struct mana_recv_buf_oob *rxoob, void **old_buf, 2079 bool *old_fp) 2080 { 2081 bool from_pool; 2082 dma_addr_t da; 2083 void *va; 2084 2085 va = mana_get_rxfrag(rxq, dev, &da, &from_pool); 2086 if (!va) 2087 return; 2088 if (!rxoob->from_pool || rxq->frag_count == 1) 2089 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 2090 DMA_FROM_DEVICE); 2091 *old_buf = rxoob->buf_va; 2092 *old_fp = rxoob->from_pool; 2093 2094 rxoob->buf_va = va; 2095 rxoob->sgl[0].address = da; 2096 rxoob->from_pool = from_pool; 2097 } 2098 2099 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 2100 struct gdma_comp *cqe) 2101 { 2102 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 2103 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 2104 struct net_device *ndev = rxq->ndev; 2105 struct mana_recv_buf_oob *rxbuf_oob; 2106 struct mana_port_context *apc; 2107 struct device *dev = gc->dev; 2108 void *old_buf = NULL; 2109 u32 curr, pktlen; 2110 bool old_fp; 2111 2112 apc = netdev_priv(ndev); 2113 2114 switch (oob->cqe_hdr.cqe_type) { 2115 case CQE_RX_OKAY: 2116 break; 2117 2118 case CQE_RX_TRUNCATED: 2119 ++ndev->stats.rx_dropped; 2120 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 2121 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 2122 goto drop; 2123 2124 case CQE_RX_COALESCED_4: 2125 netdev_err(ndev, "RX coalescing is unsupported\n"); 2126 apc->eth_stats.rx_coalesced_err++; 2127 return; 2128 2129 case CQE_RX_OBJECT_FENCE: 2130 complete(&rxq->fence_event); 2131 return; 2132 2133 default: 2134 netdev_err(ndev, "Unknown RX CQE type = %d\n", 2135 oob->cqe_hdr.cqe_type); 2136 apc->eth_stats.rx_cqe_unknown_type++; 2137 return; 2138 } 2139 2140 pktlen = oob->ppi[0].pkt_len; 2141 2142 if (pktlen == 0) { 2143 /* data packets should never have packetlength of zero */ 2144 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 2145 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 2146 return; 2147 } 2148 2149 curr = rxq->buf_index; 2150 rxbuf_oob = &rxq->rx_oobs[curr]; 2151 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 2152 2153 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 2154 2155 /* Unsuccessful refill will have old_buf == NULL. 2156 * In this case, mana_rx_skb() will drop the packet. 2157 */ 2158 mana_rx_skb(old_buf, old_fp, oob, rxq); 2159 2160 drop: 2161 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 2162 2163 mana_post_pkt_rxq(rxq); 2164 } 2165 2166 static void mana_poll_rx_cq(struct mana_cq *cq) 2167 { 2168 struct gdma_comp *comp = cq->gdma_comp_buf; 2169 struct mana_rxq *rxq = cq->rxq; 2170 int comp_read, i; 2171 2172 /* Limit CQEs polled to 4 wraparounds of the CQ to ensure the 2173 * doorbell can be rung in time for the hardware's requirement 2174 * of at least one doorbell ring every 8 wraparounds. 2175 */ 2176 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, 2177 min((cq->gdma_cq->queue_size / 2178 COMP_ENTRY_SIZE) * 4, 2179 CQE_POLLING_BUFFER)); 2180 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 2181 2182 rxq->xdp_flush = false; 2183 2184 for (i = 0; i < comp_read; i++) { 2185 if (WARN_ON_ONCE(comp[i].is_sq)) 2186 return; 2187 2188 /* verify recv cqe references the right rxq */ 2189 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 2190 return; 2191 2192 mana_process_rx_cqe(rxq, cq, &comp[i]); 2193 } 2194 2195 if (comp_read > 0) { 2196 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 2197 2198 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 2199 } 2200 2201 if (rxq->xdp_flush) 2202 xdp_do_flush(); 2203 } 2204 2205 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 2206 { 2207 struct mana_cq *cq = context; 2208 int w; 2209 2210 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 2211 2212 if (cq->type == MANA_CQ_TYPE_RX) 2213 mana_poll_rx_cq(cq); 2214 else 2215 mana_poll_tx_cq(cq); 2216 2217 w = cq->work_done; 2218 cq->work_done_since_doorbell += w; 2219 2220 if (w < cq->budget) { 2221 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT); 2222 cq->work_done_since_doorbell = 0; 2223 napi_complete_done(&cq->napi, w); 2224 } else if (cq->work_done_since_doorbell >= 2225 (cq->gdma_cq->queue_size / COMP_ENTRY_SIZE) * 4) { 2226 /* MANA hardware requires at least one doorbell ring every 8 2227 * wraparounds of CQ even if there is no need to arm the CQ. 2228 * This driver rings the doorbell as soon as it has processed 2229 * 4 wraparounds. 2230 */ 2231 mana_gd_ring_cq(gdma_queue, 0); 2232 cq->work_done_since_doorbell = 0; 2233 } 2234 2235 return w; 2236 } 2237 2238 static int mana_poll(struct napi_struct *napi, int budget) 2239 { 2240 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 2241 int w; 2242 2243 cq->work_done = 0; 2244 cq->budget = budget; 2245 2246 w = mana_cq_handler(cq, cq->gdma_cq); 2247 2248 return min(w, budget); 2249 } 2250 2251 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 2252 { 2253 struct mana_cq *cq = context; 2254 2255 napi_schedule_irqoff(&cq->napi); 2256 } 2257 2258 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 2259 { 2260 struct gdma_dev *gd = apc->ac->gdma_dev; 2261 2262 if (!cq->gdma_cq) 2263 return; 2264 2265 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 2266 } 2267 2268 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 2269 { 2270 struct gdma_dev *gd = apc->ac->gdma_dev; 2271 2272 if (!txq->gdma_sq) 2273 return; 2274 2275 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 2276 } 2277 2278 static void mana_destroy_txq(struct mana_port_context *apc) 2279 { 2280 struct napi_struct *napi; 2281 int i; 2282 2283 if (!apc->tx_qp) 2284 return; 2285 2286 for (i = 0; i < apc->num_queues; i++) { 2287 debugfs_remove_recursive(apc->tx_qp[i].mana_tx_debugfs); 2288 apc->tx_qp[i].mana_tx_debugfs = NULL; 2289 2290 napi = &apc->tx_qp[i].tx_cq.napi; 2291 if (apc->tx_qp[i].txq.napi_initialized) { 2292 napi_synchronize(napi); 2293 napi_disable_locked(napi); 2294 netif_napi_del_locked(napi); 2295 apc->tx_qp[i].txq.napi_initialized = false; 2296 } 2297 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 2298 2299 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 2300 2301 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 2302 } 2303 2304 kfree(apc->tx_qp); 2305 apc->tx_qp = NULL; 2306 } 2307 2308 static void mana_create_txq_debugfs(struct mana_port_context *apc, int idx) 2309 { 2310 struct mana_tx_qp *tx_qp = &apc->tx_qp[idx]; 2311 char qnum[32]; 2312 2313 sprintf(qnum, "TX-%d", idx); 2314 tx_qp->mana_tx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 2315 debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs, 2316 &tx_qp->txq.gdma_sq->head); 2317 debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs, 2318 &tx_qp->txq.gdma_sq->tail); 2319 debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debugfs, 2320 &tx_qp->txq.pending_skbs.qlen); 2321 debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs, 2322 &tx_qp->tx_cq.gdma_cq->head); 2323 debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs, 2324 &tx_qp->tx_cq.gdma_cq->tail); 2325 debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs, 2326 &tx_qp->tx_cq.budget); 2327 debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs, 2328 tx_qp->txq.gdma_sq, &mana_dbg_q_fops); 2329 debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs, 2330 tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops); 2331 } 2332 2333 static int mana_create_txq(struct mana_port_context *apc, 2334 struct net_device *net) 2335 { 2336 struct mana_context *ac = apc->ac; 2337 struct gdma_dev *gd = ac->gdma_dev; 2338 struct mana_obj_spec wq_spec; 2339 struct mana_obj_spec cq_spec; 2340 struct gdma_queue_spec spec; 2341 struct gdma_context *gc; 2342 struct mana_txq *txq; 2343 struct mana_cq *cq; 2344 u32 txq_size; 2345 u32 cq_size; 2346 int err; 2347 int i; 2348 2349 apc->tx_qp = kzalloc_objs(struct mana_tx_qp, apc->num_queues); 2350 if (!apc->tx_qp) 2351 return -ENOMEM; 2352 2353 /* The minimum size of the WQE is 32 bytes, hence 2354 * apc->tx_queue_size represents the maximum number of WQEs 2355 * the SQ can store. This value is then used to size other queues 2356 * to prevent overflow. 2357 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED, 2358 * as min val of apc->tx_queue_size is 128 and that would make 2359 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size 2360 * are always power of two 2361 */ 2362 txq_size = apc->tx_queue_size * 32; 2363 2364 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE; 2365 2366 gc = gd->gdma_context; 2367 2368 for (i = 0; i < apc->num_queues; i++) { 2369 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 2370 2371 /* Create SQ */ 2372 txq = &apc->tx_qp[i].txq; 2373 2374 u64_stats_init(&txq->stats.syncp); 2375 txq->ndev = net; 2376 txq->net_txq = netdev_get_tx_queue(net, i); 2377 txq->vp_offset = apc->tx_vp_offset; 2378 txq->napi_initialized = false; 2379 skb_queue_head_init(&txq->pending_skbs); 2380 2381 memset(&spec, 0, sizeof(spec)); 2382 spec.type = GDMA_SQ; 2383 spec.monitor_avl_buf = true; 2384 spec.queue_size = txq_size; 2385 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 2386 if (err) 2387 goto out; 2388 2389 /* Create SQ's CQ */ 2390 cq = &apc->tx_qp[i].tx_cq; 2391 cq->type = MANA_CQ_TYPE_TX; 2392 2393 cq->txq = txq; 2394 2395 memset(&spec, 0, sizeof(spec)); 2396 spec.type = GDMA_CQ; 2397 spec.monitor_avl_buf = false; 2398 spec.queue_size = cq_size; 2399 spec.cq.callback = mana_schedule_napi; 2400 spec.cq.parent_eq = ac->eqs[i].eq; 2401 spec.cq.context = cq; 2402 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2403 if (err) 2404 goto out; 2405 2406 memset(&wq_spec, 0, sizeof(wq_spec)); 2407 memset(&cq_spec, 0, sizeof(cq_spec)); 2408 2409 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 2410 wq_spec.queue_size = txq->gdma_sq->queue_size; 2411 2412 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2413 cq_spec.queue_size = cq->gdma_cq->queue_size; 2414 cq_spec.modr_ctx_id = 0; 2415 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2416 2417 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 2418 &wq_spec, &cq_spec, 2419 &apc->tx_qp[i].tx_object); 2420 2421 if (err) 2422 goto out; 2423 2424 txq->gdma_sq->id = wq_spec.queue_index; 2425 cq->gdma_cq->id = cq_spec.queue_index; 2426 2427 txq->gdma_sq->mem_info.dma_region_handle = 2428 GDMA_INVALID_DMA_REGION; 2429 cq->gdma_cq->mem_info.dma_region_handle = 2430 GDMA_INVALID_DMA_REGION; 2431 2432 txq->gdma_txq_id = txq->gdma_sq->id; 2433 2434 cq->gdma_id = cq->gdma_cq->id; 2435 2436 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2437 err = -EINVAL; 2438 goto out; 2439 } 2440 2441 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2442 2443 mana_create_txq_debugfs(apc, i); 2444 2445 set_bit(NAPI_STATE_NO_BUSY_POLL, &cq->napi.state); 2446 netif_napi_add_locked(net, &cq->napi, mana_poll); 2447 napi_enable_locked(&cq->napi); 2448 txq->napi_initialized = true; 2449 2450 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2451 } 2452 2453 return 0; 2454 out: 2455 netdev_err(net, "Failed to create %d TX queues, %d\n", 2456 apc->num_queues, err); 2457 mana_destroy_txq(apc); 2458 return err; 2459 } 2460 2461 static void mana_destroy_rxq(struct mana_port_context *apc, 2462 struct mana_rxq *rxq, bool napi_initialized) 2463 2464 { 2465 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2466 struct mana_recv_buf_oob *rx_oob; 2467 struct device *dev = gc->dev; 2468 struct napi_struct *napi; 2469 struct page *page; 2470 int i; 2471 2472 if (!rxq) 2473 return; 2474 2475 debugfs_remove_recursive(rxq->mana_rx_debugfs); 2476 rxq->mana_rx_debugfs = NULL; 2477 2478 napi = &rxq->rx_cq.napi; 2479 2480 if (napi_initialized) { 2481 napi_synchronize(napi); 2482 2483 napi_disable_locked(napi); 2484 netif_napi_del_locked(napi); 2485 } 2486 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2487 2488 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2489 2490 mana_deinit_cq(apc, &rxq->rx_cq); 2491 2492 if (rxq->xdp_save_va) 2493 put_page(virt_to_head_page(rxq->xdp_save_va)); 2494 2495 for (i = 0; i < rxq->num_rx_buf; i++) { 2496 rx_oob = &rxq->rx_oobs[i]; 2497 2498 if (!rx_oob->buf_va) 2499 continue; 2500 2501 page = virt_to_head_page(rx_oob->buf_va); 2502 2503 if (rxq->frag_count == 1 || !rx_oob->from_pool) { 2504 dma_unmap_single(dev, rx_oob->sgl[0].address, 2505 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2506 mana_put_rx_page(rxq, page, rx_oob->from_pool); 2507 } else { 2508 page_pool_free_va(rxq->page_pool, rx_oob->buf_va, true); 2509 } 2510 2511 rx_oob->buf_va = NULL; 2512 } 2513 2514 page_pool_destroy(rxq->page_pool); 2515 2516 if (rxq->gdma_rq) 2517 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2518 2519 kfree(rxq); 2520 } 2521 2522 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2523 struct mana_rxq *rxq, struct device *dev) 2524 { 2525 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2526 bool from_pool = false; 2527 dma_addr_t da; 2528 void *va; 2529 2530 if (mpc->rxbufs_pre) 2531 va = mana_get_rxbuf_pre(rxq, &da); 2532 else 2533 va = mana_get_rxfrag(rxq, dev, &da, &from_pool); 2534 2535 if (!va) 2536 return -ENOMEM; 2537 2538 rx_oob->buf_va = va; 2539 rx_oob->from_pool = from_pool; 2540 2541 rx_oob->sgl[0].address = da; 2542 rx_oob->sgl[0].size = rxq->datasize; 2543 rx_oob->sgl[0].mem_key = mem_key; 2544 2545 return 0; 2546 } 2547 2548 #define MANA_WQE_HEADER_SIZE 16 2549 #define MANA_WQE_SGE_SIZE 16 2550 2551 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2552 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2553 { 2554 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2555 struct mana_recv_buf_oob *rx_oob; 2556 struct device *dev = gc->dev; 2557 u32 buf_idx; 2558 int ret; 2559 2560 WARN_ON(rxq->datasize == 0); 2561 2562 *rxq_size = 0; 2563 *cq_size = 0; 2564 2565 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2566 rx_oob = &rxq->rx_oobs[buf_idx]; 2567 memset(rx_oob, 0, sizeof(*rx_oob)); 2568 2569 rx_oob->num_sge = 1; 2570 2571 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2572 dev); 2573 if (ret) 2574 return ret; 2575 2576 rx_oob->wqe_req.sgl = rx_oob->sgl; 2577 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2578 rx_oob->wqe_req.inline_oob_size = 0; 2579 rx_oob->wqe_req.inline_oob_data = NULL; 2580 rx_oob->wqe_req.flags = 0; 2581 rx_oob->wqe_req.client_data_unit = 0; 2582 2583 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2584 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2585 *cq_size += COMP_ENTRY_SIZE; 2586 } 2587 2588 return 0; 2589 } 2590 2591 static int mana_push_wqe(struct mana_rxq *rxq) 2592 { 2593 struct mana_recv_buf_oob *rx_oob; 2594 u32 buf_idx; 2595 int err; 2596 2597 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2598 rx_oob = &rxq->rx_oobs[buf_idx]; 2599 2600 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2601 &rx_oob->wqe_inf); 2602 if (err) 2603 return -ENOSPC; 2604 } 2605 2606 return 0; 2607 } 2608 2609 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2610 { 2611 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2612 struct page_pool_params pprm = {}; 2613 int ret; 2614 2615 pprm.pool_size = mpc->rx_queue_size / rxq->frag_count + 1; 2616 pprm.nid = gc->numa_node; 2617 pprm.napi = &rxq->rx_cq.napi; 2618 pprm.netdev = rxq->ndev; 2619 pprm.order = get_order(rxq->alloc_size); 2620 pprm.queue_idx = rxq->rxq_idx; 2621 pprm.dev = gc->dev; 2622 2623 /* Let the page pool do the dma map when page sharing with multiple 2624 * fragments enabled for rx buffers. 2625 */ 2626 if (rxq->frag_count > 1) { 2627 pprm.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; 2628 pprm.max_len = PAGE_SIZE; 2629 pprm.dma_dir = DMA_FROM_DEVICE; 2630 } 2631 2632 rxq->page_pool = page_pool_create(&pprm); 2633 2634 if (IS_ERR(rxq->page_pool)) { 2635 ret = PTR_ERR(rxq->page_pool); 2636 rxq->page_pool = NULL; 2637 return ret; 2638 } 2639 2640 return 0; 2641 } 2642 2643 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2644 u32 rxq_idx, struct mana_eq *eq, 2645 struct net_device *ndev) 2646 { 2647 struct gdma_dev *gd = apc->ac->gdma_dev; 2648 struct mana_obj_spec wq_spec; 2649 struct mana_obj_spec cq_spec; 2650 struct gdma_queue_spec spec; 2651 struct mana_cq *cq = NULL; 2652 struct gdma_context *gc; 2653 u32 cq_size, rq_size; 2654 struct mana_rxq *rxq; 2655 int err; 2656 2657 gc = gd->gdma_context; 2658 2659 rxq = kzalloc_flex(*rxq, rx_oobs, apc->rx_queue_size); 2660 if (!rxq) 2661 return NULL; 2662 2663 rxq->ndev = ndev; 2664 rxq->num_rx_buf = apc->rx_queue_size; 2665 rxq->rxq_idx = rxq_idx; 2666 rxq->rxobj = INVALID_MANA_HANDLE; 2667 2668 mana_get_rxbuf_cfg(apc, ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2669 &rxq->headroom, &rxq->frag_count); 2670 /* Create page pool for RX queue */ 2671 err = mana_create_page_pool(rxq, gc); 2672 if (err) { 2673 netdev_err(ndev, "Create page pool err:%d\n", err); 2674 goto out; 2675 } 2676 2677 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2678 if (err) 2679 goto out; 2680 2681 rq_size = MANA_PAGE_ALIGN(rq_size); 2682 cq_size = MANA_PAGE_ALIGN(cq_size); 2683 2684 /* Create RQ */ 2685 memset(&spec, 0, sizeof(spec)); 2686 spec.type = GDMA_RQ; 2687 spec.monitor_avl_buf = true; 2688 spec.queue_size = rq_size; 2689 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2690 if (err) 2691 goto out; 2692 2693 /* Create RQ's CQ */ 2694 cq = &rxq->rx_cq; 2695 cq->type = MANA_CQ_TYPE_RX; 2696 cq->rxq = rxq; 2697 2698 memset(&spec, 0, sizeof(spec)); 2699 spec.type = GDMA_CQ; 2700 spec.monitor_avl_buf = false; 2701 spec.queue_size = cq_size; 2702 spec.cq.callback = mana_schedule_napi; 2703 spec.cq.parent_eq = eq->eq; 2704 spec.cq.context = cq; 2705 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2706 if (err) 2707 goto out; 2708 2709 memset(&wq_spec, 0, sizeof(wq_spec)); 2710 memset(&cq_spec, 0, sizeof(cq_spec)); 2711 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2712 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2713 2714 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2715 cq_spec.queue_size = cq->gdma_cq->queue_size; 2716 cq_spec.modr_ctx_id = 0; 2717 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2718 2719 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2720 &wq_spec, &cq_spec, &rxq->rxobj); 2721 if (err) 2722 goto out; 2723 2724 rxq->gdma_rq->id = wq_spec.queue_index; 2725 cq->gdma_cq->id = cq_spec.queue_index; 2726 2727 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2728 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2729 2730 rxq->gdma_id = rxq->gdma_rq->id; 2731 cq->gdma_id = cq->gdma_cq->id; 2732 2733 err = mana_push_wqe(rxq); 2734 if (err) 2735 goto out; 2736 2737 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2738 err = -EINVAL; 2739 goto out; 2740 } 2741 2742 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2743 2744 netif_napi_add_weight_locked(ndev, &cq->napi, mana_poll, 1); 2745 2746 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2747 cq->napi.napi_id)); 2748 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2749 rxq->page_pool)); 2750 2751 napi_enable_locked(&cq->napi); 2752 2753 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2754 out: 2755 if (!err) 2756 return rxq; 2757 2758 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2759 2760 mana_destroy_rxq(apc, rxq, false); 2761 2762 if (cq) 2763 mana_deinit_cq(apc, cq); 2764 2765 return NULL; 2766 } 2767 2768 static void mana_create_rxq_debugfs(struct mana_port_context *apc, int idx) 2769 { 2770 struct mana_rxq *rxq; 2771 char qnum[32]; 2772 2773 rxq = apc->rxqs[idx]; 2774 2775 sprintf(qnum, "RX-%d", idx); 2776 rxq->mana_rx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 2777 debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->head); 2778 debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->tail); 2779 debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->num_rx_buf); 2780 debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs, 2781 &rxq->rx_cq.gdma_cq->head); 2782 debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs, 2783 &rxq->rx_cq.gdma_cq->tail); 2784 debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq->rx_cq.budget); 2785 debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->gdma_rq, &mana_dbg_q_fops); 2786 debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->rx_cq.gdma_cq, 2787 &mana_dbg_q_fops); 2788 } 2789 2790 static int mana_add_rx_queues(struct mana_port_context *apc, 2791 struct net_device *ndev) 2792 { 2793 struct mana_context *ac = apc->ac; 2794 struct mana_rxq *rxq; 2795 int err = 0; 2796 int i; 2797 2798 for (i = 0; i < apc->num_queues; i++) { 2799 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2800 if (!rxq) { 2801 err = -ENOMEM; 2802 netdev_err(ndev, "Failed to create rxq %d : %d\n", i, err); 2803 goto out; 2804 } 2805 2806 u64_stats_init(&rxq->stats.syncp); 2807 2808 apc->rxqs[i] = rxq; 2809 2810 mana_create_rxq_debugfs(apc, i); 2811 } 2812 2813 apc->default_rxobj = apc->rxqs[0]->rxobj; 2814 out: 2815 return err; 2816 } 2817 2818 static void mana_destroy_vport(struct mana_port_context *apc) 2819 { 2820 struct gdma_dev *gd = apc->ac->gdma_dev; 2821 struct mana_rxq *rxq; 2822 u32 rxq_idx; 2823 2824 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2825 rxq = apc->rxqs[rxq_idx]; 2826 if (!rxq) 2827 continue; 2828 2829 mana_destroy_rxq(apc, rxq, true); 2830 apc->rxqs[rxq_idx] = NULL; 2831 } 2832 2833 mana_destroy_txq(apc); 2834 mana_uncfg_vport(apc); 2835 2836 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) 2837 mana_pf_deregister_hw_vport(apc); 2838 } 2839 2840 static int mana_create_vport(struct mana_port_context *apc, 2841 struct net_device *net) 2842 { 2843 struct gdma_dev *gd = apc->ac->gdma_dev; 2844 int err; 2845 2846 apc->default_rxobj = INVALID_MANA_HANDLE; 2847 2848 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) { 2849 err = mana_pf_register_hw_vport(apc); 2850 if (err) 2851 return err; 2852 } 2853 2854 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2855 if (err) 2856 return err; 2857 2858 return mana_create_txq(apc, net); 2859 } 2860 2861 static int mana_rss_table_alloc(struct mana_port_context *apc) 2862 { 2863 if (!apc->indir_table_sz) { 2864 netdev_err(apc->ndev, 2865 "Indirection table size not set for vPort %d\n", 2866 apc->port_idx); 2867 return -EINVAL; 2868 } 2869 2870 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL); 2871 if (!apc->indir_table) 2872 return -ENOMEM; 2873 2874 apc->rxobj_table = kzalloc_objs(mana_handle_t, apc->indir_table_sz); 2875 if (!apc->rxobj_table) { 2876 kfree(apc->indir_table); 2877 return -ENOMEM; 2878 } 2879 2880 return 0; 2881 } 2882 2883 static void mana_rss_table_init(struct mana_port_context *apc) 2884 { 2885 int i; 2886 2887 for (i = 0; i < apc->indir_table_sz; i++) 2888 apc->indir_table[i] = 2889 ethtool_rxfh_indir_default(i, apc->num_queues); 2890 } 2891 2892 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2893 bool update_hash, bool update_tab) 2894 { 2895 u32 queue_idx; 2896 int err; 2897 int i; 2898 2899 if (update_tab) { 2900 for (i = 0; i < apc->indir_table_sz; i++) { 2901 queue_idx = apc->indir_table[i]; 2902 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2903 } 2904 } 2905 2906 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2907 if (err) 2908 return err; 2909 2910 mana_fence_rqs(apc); 2911 2912 return 0; 2913 } 2914 2915 int mana_query_gf_stats(struct mana_context *ac) 2916 { 2917 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2918 struct mana_query_gf_stat_resp resp = {}; 2919 struct mana_query_gf_stat_req req = {}; 2920 struct device *dev = gc->dev; 2921 int err; 2922 2923 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2924 sizeof(req), sizeof(resp)); 2925 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 2926 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE | 2927 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED | 2928 STATISTICS_FLAGS_HC_RX_BYTES | 2929 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS | 2930 STATISTICS_FLAGS_HC_RX_UCAST_BYTES | 2931 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS | 2932 STATISTICS_FLAGS_HC_RX_MCAST_BYTES | 2933 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS | 2934 STATISTICS_FLAGS_HC_RX_BCAST_BYTES | 2935 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED | 2936 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED | 2937 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS | 2938 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT | 2939 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT | 2940 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT | 2941 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT | 2942 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT | 2943 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION | 2944 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB | 2945 STATISTICS_FLAGS_HC_TX_BYTES | 2946 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2947 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2948 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2949 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2950 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2951 STATISTICS_FLAGS_HC_TX_BCAST_BYTES | 2952 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR; 2953 2954 err = mana_send_request(ac, &req, sizeof(req), &resp, 2955 sizeof(resp)); 2956 if (err) { 2957 dev_err(dev, "Failed to query GF stats: %d\n", err); 2958 return err; 2959 } 2960 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2961 sizeof(resp)); 2962 if (err || resp.hdr.status) { 2963 dev_err(dev, "Failed to query GF stats: %d, 0x%x\n", err, 2964 resp.hdr.status); 2965 return err; 2966 } 2967 2968 ac->hc_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe; 2969 ac->hc_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled; 2970 ac->hc_stats.hc_rx_bytes = resp.hc_rx_bytes; 2971 ac->hc_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts; 2972 ac->hc_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes; 2973 ac->hc_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts; 2974 ac->hc_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes; 2975 ac->hc_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts; 2976 ac->hc_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes; 2977 ac->hc_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled; 2978 ac->hc_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled; 2979 ac->hc_stats.hc_tx_err_inval_vportoffset_pkt = 2980 resp.tx_err_inval_vport_offset_pkt; 2981 ac->hc_stats.hc_tx_err_vlan_enforcement = 2982 resp.tx_err_vlan_enforcement; 2983 ac->hc_stats.hc_tx_err_eth_type_enforcement = 2984 resp.tx_err_ethtype_enforcement; 2985 ac->hc_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement; 2986 ac->hc_stats.hc_tx_err_sqpdid_enforcement = 2987 resp.tx_err_SQPDID_enforcement; 2988 ac->hc_stats.hc_tx_err_cqpdid_enforcement = 2989 resp.tx_err_CQPDID_enforcement; 2990 ac->hc_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation; 2991 ac->hc_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob; 2992 ac->hc_stats.hc_tx_bytes = resp.hc_tx_bytes; 2993 ac->hc_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2994 ac->hc_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2995 ac->hc_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2996 ac->hc_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2997 ac->hc_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2998 ac->hc_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2999 ac->hc_stats.hc_tx_err_gdma = resp.tx_err_gdma; 3000 3001 return 0; 3002 } 3003 3004 void mana_query_phy_stats(struct mana_port_context *apc) 3005 { 3006 struct mana_query_phy_stat_resp resp = {}; 3007 struct mana_query_phy_stat_req req = {}; 3008 struct net_device *ndev = apc->ndev; 3009 int err; 3010 3011 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_PHY_STAT, 3012 sizeof(req), sizeof(resp)); 3013 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 3014 sizeof(resp)); 3015 if (err) 3016 return; 3017 3018 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_PHY_STAT, 3019 sizeof(resp)); 3020 if (err || resp.hdr.status) { 3021 netdev_err(ndev, 3022 "Failed to query PHY stats: %d, resp:0x%x\n", 3023 err, resp.hdr.status); 3024 return; 3025 } 3026 3027 /* Aggregate drop counters */ 3028 apc->phy_stats.rx_pkt_drop_phy = resp.rx_pkt_drop_phy; 3029 apc->phy_stats.tx_pkt_drop_phy = resp.tx_pkt_drop_phy; 3030 3031 /* Per TC traffic Counters */ 3032 apc->phy_stats.rx_pkt_tc0_phy = resp.rx_pkt_tc0_phy; 3033 apc->phy_stats.tx_pkt_tc0_phy = resp.tx_pkt_tc0_phy; 3034 apc->phy_stats.rx_pkt_tc1_phy = resp.rx_pkt_tc1_phy; 3035 apc->phy_stats.tx_pkt_tc1_phy = resp.tx_pkt_tc1_phy; 3036 apc->phy_stats.rx_pkt_tc2_phy = resp.rx_pkt_tc2_phy; 3037 apc->phy_stats.tx_pkt_tc2_phy = resp.tx_pkt_tc2_phy; 3038 apc->phy_stats.rx_pkt_tc3_phy = resp.rx_pkt_tc3_phy; 3039 apc->phy_stats.tx_pkt_tc3_phy = resp.tx_pkt_tc3_phy; 3040 apc->phy_stats.rx_pkt_tc4_phy = resp.rx_pkt_tc4_phy; 3041 apc->phy_stats.tx_pkt_tc4_phy = resp.tx_pkt_tc4_phy; 3042 apc->phy_stats.rx_pkt_tc5_phy = resp.rx_pkt_tc5_phy; 3043 apc->phy_stats.tx_pkt_tc5_phy = resp.tx_pkt_tc5_phy; 3044 apc->phy_stats.rx_pkt_tc6_phy = resp.rx_pkt_tc6_phy; 3045 apc->phy_stats.tx_pkt_tc6_phy = resp.tx_pkt_tc6_phy; 3046 apc->phy_stats.rx_pkt_tc7_phy = resp.rx_pkt_tc7_phy; 3047 apc->phy_stats.tx_pkt_tc7_phy = resp.tx_pkt_tc7_phy; 3048 3049 /* Per TC byte Counters */ 3050 apc->phy_stats.rx_byte_tc0_phy = resp.rx_byte_tc0_phy; 3051 apc->phy_stats.tx_byte_tc0_phy = resp.tx_byte_tc0_phy; 3052 apc->phy_stats.rx_byte_tc1_phy = resp.rx_byte_tc1_phy; 3053 apc->phy_stats.tx_byte_tc1_phy = resp.tx_byte_tc1_phy; 3054 apc->phy_stats.rx_byte_tc2_phy = resp.rx_byte_tc2_phy; 3055 apc->phy_stats.tx_byte_tc2_phy = resp.tx_byte_tc2_phy; 3056 apc->phy_stats.rx_byte_tc3_phy = resp.rx_byte_tc3_phy; 3057 apc->phy_stats.tx_byte_tc3_phy = resp.tx_byte_tc3_phy; 3058 apc->phy_stats.rx_byte_tc4_phy = resp.rx_byte_tc4_phy; 3059 apc->phy_stats.tx_byte_tc4_phy = resp.tx_byte_tc4_phy; 3060 apc->phy_stats.rx_byte_tc5_phy = resp.rx_byte_tc5_phy; 3061 apc->phy_stats.tx_byte_tc5_phy = resp.tx_byte_tc5_phy; 3062 apc->phy_stats.rx_byte_tc6_phy = resp.rx_byte_tc6_phy; 3063 apc->phy_stats.tx_byte_tc6_phy = resp.tx_byte_tc6_phy; 3064 apc->phy_stats.rx_byte_tc7_phy = resp.rx_byte_tc7_phy; 3065 apc->phy_stats.tx_byte_tc7_phy = resp.tx_byte_tc7_phy; 3066 3067 /* Per TC pause Counters */ 3068 apc->phy_stats.rx_pause_tc0_phy = resp.rx_pause_tc0_phy; 3069 apc->phy_stats.tx_pause_tc0_phy = resp.tx_pause_tc0_phy; 3070 apc->phy_stats.rx_pause_tc1_phy = resp.rx_pause_tc1_phy; 3071 apc->phy_stats.tx_pause_tc1_phy = resp.tx_pause_tc1_phy; 3072 apc->phy_stats.rx_pause_tc2_phy = resp.rx_pause_tc2_phy; 3073 apc->phy_stats.tx_pause_tc2_phy = resp.tx_pause_tc2_phy; 3074 apc->phy_stats.rx_pause_tc3_phy = resp.rx_pause_tc3_phy; 3075 apc->phy_stats.tx_pause_tc3_phy = resp.tx_pause_tc3_phy; 3076 apc->phy_stats.rx_pause_tc4_phy = resp.rx_pause_tc4_phy; 3077 apc->phy_stats.tx_pause_tc4_phy = resp.tx_pause_tc4_phy; 3078 apc->phy_stats.rx_pause_tc5_phy = resp.rx_pause_tc5_phy; 3079 apc->phy_stats.tx_pause_tc5_phy = resp.tx_pause_tc5_phy; 3080 apc->phy_stats.rx_pause_tc6_phy = resp.rx_pause_tc6_phy; 3081 apc->phy_stats.tx_pause_tc6_phy = resp.tx_pause_tc6_phy; 3082 apc->phy_stats.rx_pause_tc7_phy = resp.rx_pause_tc7_phy; 3083 apc->phy_stats.tx_pause_tc7_phy = resp.tx_pause_tc7_phy; 3084 } 3085 3086 static int mana_init_port(struct net_device *ndev) 3087 { 3088 struct mana_port_context *apc = netdev_priv(ndev); 3089 struct gdma_dev *gd = apc->ac->gdma_dev; 3090 u32 max_txq, max_rxq, max_queues; 3091 int port_idx = apc->port_idx; 3092 struct gdma_context *gc; 3093 char vport[32]; 3094 int err; 3095 3096 err = mana_init_port_context(apc); 3097 if (err) 3098 return err; 3099 3100 gc = gd->gdma_context; 3101 3102 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 3103 &apc->indir_table_sz); 3104 if (err) { 3105 netdev_err(ndev, "Failed to query info for vPort %d\n", 3106 port_idx); 3107 goto reset_apc; 3108 } 3109 3110 max_queues = min_t(u32, max_txq, max_rxq); 3111 if (apc->max_queues > max_queues) 3112 apc->max_queues = max_queues; 3113 3114 if (apc->num_queues > apc->max_queues) 3115 apc->num_queues = apc->max_queues; 3116 3117 eth_hw_addr_set(ndev, apc->mac_addr); 3118 sprintf(vport, "vport%d", port_idx); 3119 apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs); 3120 return 0; 3121 3122 reset_apc: 3123 mana_cleanup_port_context(apc); 3124 return err; 3125 } 3126 3127 int mana_alloc_queues(struct net_device *ndev) 3128 { 3129 struct mana_port_context *apc = netdev_priv(ndev); 3130 struct gdma_dev *gd = apc->ac->gdma_dev; 3131 int err; 3132 3133 err = mana_create_vport(apc, ndev); 3134 if (err) { 3135 netdev_err(ndev, "Failed to create vPort %u : %d\n", apc->port_idx, err); 3136 return err; 3137 } 3138 3139 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 3140 if (err) { 3141 netdev_err(ndev, 3142 "netif_set_real_num_tx_queues () failed for ndev with num_queues %u : %d\n", 3143 apc->num_queues, err); 3144 goto destroy_vport; 3145 } 3146 3147 err = mana_add_rx_queues(apc, ndev); 3148 if (err) 3149 goto destroy_vport; 3150 3151 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 3152 3153 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 3154 if (err) { 3155 netdev_err(ndev, 3156 "netif_set_real_num_rx_queues () failed for ndev with num_queues %u : %d\n", 3157 apc->num_queues, err); 3158 goto destroy_vport; 3159 } 3160 3161 mana_rss_table_init(apc); 3162 3163 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 3164 if (err) { 3165 netdev_err(ndev, "Failed to configure RSS table: %d\n", err); 3166 goto destroy_vport; 3167 } 3168 3169 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) { 3170 err = mana_pf_register_filter(apc); 3171 if (err) 3172 goto destroy_vport; 3173 } 3174 3175 mana_chn_setxdp(apc, mana_xdp_get(apc)); 3176 3177 return 0; 3178 3179 destroy_vport: 3180 mana_destroy_vport(apc); 3181 return err; 3182 } 3183 3184 int mana_attach(struct net_device *ndev) 3185 { 3186 struct mana_port_context *apc = netdev_priv(ndev); 3187 int err; 3188 3189 ASSERT_RTNL(); 3190 3191 err = mana_init_port(ndev); 3192 if (err) 3193 return err; 3194 3195 if (apc->port_st_save) { 3196 err = mana_alloc_queues(ndev); 3197 if (err) { 3198 mana_cleanup_port_context(apc); 3199 return err; 3200 } 3201 } 3202 3203 apc->port_is_up = apc->port_st_save; 3204 3205 /* Ensure port state updated before txq state */ 3206 smp_wmb(); 3207 3208 netif_device_attach(ndev); 3209 3210 return 0; 3211 } 3212 3213 static int mana_dealloc_queues(struct net_device *ndev) 3214 { 3215 struct mana_port_context *apc = netdev_priv(ndev); 3216 unsigned long timeout = jiffies + 120 * HZ; 3217 struct gdma_dev *gd = apc->ac->gdma_dev; 3218 struct mana_txq *txq; 3219 struct sk_buff *skb; 3220 int i, err; 3221 u32 tsleep; 3222 3223 if (apc->port_is_up) 3224 return -EINVAL; 3225 3226 mana_chn_setxdp(apc, NULL); 3227 3228 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) 3229 mana_pf_deregister_filter(apc); 3230 3231 /* No packet can be transmitted now since apc->port_is_up is false. 3232 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 3233 * a txq because it may not timely see apc->port_is_up being cleared 3234 * to false, but it doesn't matter since mana_start_xmit() drops any 3235 * new packets due to apc->port_is_up being false. 3236 * 3237 * Drain all the in-flight TX packets. 3238 * A timeout of 120 seconds for all the queues is used. 3239 * This will break the while loop when h/w is not responding. 3240 * This value of 120 has been decided here considering max 3241 * number of queues. 3242 */ 3243 3244 for (i = 0; i < apc->num_queues; i++) { 3245 txq = &apc->tx_qp[i].txq; 3246 tsleep = 1000; 3247 while (atomic_read(&txq->pending_sends) > 0 && 3248 time_before(jiffies, timeout)) { 3249 usleep_range(tsleep, tsleep + 1000); 3250 tsleep <<= 1; 3251 } 3252 if (atomic_read(&txq->pending_sends)) { 3253 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 3254 if (err) { 3255 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 3256 err, atomic_read(&txq->pending_sends), 3257 txq->gdma_txq_id); 3258 } 3259 break; 3260 } 3261 } 3262 3263 for (i = 0; i < apc->num_queues; i++) { 3264 txq = &apc->tx_qp[i].txq; 3265 while ((skb = skb_dequeue(&txq->pending_skbs))) { 3266 mana_unmap_skb(skb, apc); 3267 dev_kfree_skb_any(skb); 3268 } 3269 atomic_set(&txq->pending_sends, 0); 3270 } 3271 /* We're 100% sure the queues can no longer be woken up, because 3272 * we're sure now mana_poll_tx_cq() can't be running. 3273 */ 3274 3275 apc->rss_state = TRI_STATE_FALSE; 3276 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 3277 if (err && mana_en_need_log(apc, err)) 3278 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 3279 3280 /* Even in err case, still need to cleanup the vPort */ 3281 mana_destroy_vport(apc); 3282 3283 return 0; 3284 } 3285 3286 int mana_detach(struct net_device *ndev, bool from_close) 3287 { 3288 struct mana_port_context *apc = netdev_priv(ndev); 3289 int err; 3290 3291 ASSERT_RTNL(); 3292 3293 apc->port_st_save = apc->port_is_up; 3294 apc->port_is_up = false; 3295 3296 /* Ensure port state updated before txq state */ 3297 smp_wmb(); 3298 3299 netif_tx_disable(ndev); 3300 3301 if (apc->port_st_save) { 3302 err = mana_dealloc_queues(ndev); 3303 if (err) { 3304 netdev_err(ndev, "%s failed to deallocate queues: %d\n", __func__, err); 3305 return err; 3306 } 3307 } 3308 3309 if (!from_close) { 3310 netif_device_detach(ndev); 3311 mana_cleanup_port_context(apc); 3312 } 3313 3314 return 0; 3315 } 3316 3317 static int mana_probe_port(struct mana_context *ac, int port_idx, 3318 struct net_device **ndev_storage) 3319 { 3320 struct gdma_context *gc = ac->gdma_dev->gdma_context; 3321 struct mana_port_context *apc; 3322 struct net_device *ndev; 3323 int err; 3324 3325 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 3326 gc->max_num_queues); 3327 if (!ndev) 3328 return -ENOMEM; 3329 3330 *ndev_storage = ndev; 3331 3332 apc = netdev_priv(ndev); 3333 apc->ac = ac; 3334 apc->ndev = ndev; 3335 apc->max_queues = gc->max_num_queues; 3336 apc->num_queues = gc->max_num_queues; 3337 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE; 3338 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE; 3339 apc->port_handle = INVALID_MANA_HANDLE; 3340 apc->pf_filter_handle = INVALID_MANA_HANDLE; 3341 apc->port_idx = port_idx; 3342 3343 mutex_init(&apc->vport_mutex); 3344 apc->vport_use_count = 0; 3345 3346 ndev->netdev_ops = &mana_devops; 3347 ndev->ethtool_ops = &mana_ethtool_ops; 3348 ndev->mtu = ETH_DATA_LEN; 3349 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 3350 ndev->min_mtu = ETH_MIN_MTU; 3351 ndev->needed_headroom = MANA_HEADROOM; 3352 ndev->dev_port = port_idx; 3353 /* Recommended timeout based on HW FPGA re-config scenario. */ 3354 ndev->watchdog_timeo = 15 * HZ; 3355 SET_NETDEV_DEV(ndev, gc->dev); 3356 3357 netif_set_tso_max_size(ndev, GSO_MAX_SIZE); 3358 3359 netif_carrier_off(ndev); 3360 3361 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 3362 3363 err = mana_init_port(ndev); 3364 if (err) 3365 goto free_net; 3366 3367 err = mana_rss_table_alloc(apc); 3368 if (err) 3369 goto reset_apc; 3370 3371 /* Initialize the per port queue reset work.*/ 3372 INIT_WORK(&apc->queue_reset_work, 3373 mana_per_port_queue_reset_work_handler); 3374 3375 netdev_lockdep_set_classes(ndev); 3376 3377 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 3378 ndev->hw_features |= NETIF_F_RXCSUM; 3379 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 3380 ndev->hw_features |= NETIF_F_RXHASH; 3381 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 3382 NETIF_F_HW_VLAN_CTAG_RX; 3383 ndev->vlan_features = ndev->features; 3384 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 3385 NETDEV_XDP_ACT_REDIRECT | 3386 NETDEV_XDP_ACT_NDO_XMIT); 3387 3388 err = register_netdev(ndev); 3389 if (err) { 3390 netdev_err(ndev, "Unable to register netdev.\n"); 3391 goto free_indir; 3392 } 3393 3394 netif_carrier_on(ndev); 3395 3396 debugfs_create_u32("current_speed", 0400, apc->mana_port_debugfs, &apc->speed); 3397 3398 return 0; 3399 3400 free_indir: 3401 mana_cleanup_indir_table(apc); 3402 reset_apc: 3403 mana_cleanup_port_context(apc); 3404 free_net: 3405 *ndev_storage = NULL; 3406 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 3407 free_netdev(ndev); 3408 return err; 3409 } 3410 3411 static void adev_release(struct device *dev) 3412 { 3413 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 3414 3415 kfree(madev); 3416 } 3417 3418 static void remove_adev(struct gdma_dev *gd) 3419 { 3420 struct auxiliary_device *adev = gd->adev; 3421 int id = adev->id; 3422 3423 auxiliary_device_delete(adev); 3424 auxiliary_device_uninit(adev); 3425 3426 mana_adev_idx_free(id); 3427 gd->adev = NULL; 3428 } 3429 3430 static int add_adev(struct gdma_dev *gd, const char *name) 3431 { 3432 struct auxiliary_device *adev; 3433 struct mana_adev *madev; 3434 int ret; 3435 int id; 3436 3437 madev = kzalloc_obj(*madev); 3438 if (!madev) 3439 return -ENOMEM; 3440 3441 adev = &madev->adev; 3442 ret = mana_adev_idx_alloc(); 3443 if (ret < 0) 3444 goto idx_fail; 3445 id = ret; 3446 adev->id = id; 3447 3448 adev->name = name; 3449 adev->dev.parent = gd->gdma_context->dev; 3450 adev->dev.release = adev_release; 3451 madev->mdev = gd; 3452 3453 ret = auxiliary_device_init(adev); 3454 if (ret) 3455 goto init_fail; 3456 3457 /* madev is owned by the auxiliary device */ 3458 madev = NULL; 3459 ret = auxiliary_device_add(adev); 3460 if (ret) 3461 goto add_fail; 3462 3463 gd->adev = adev; 3464 dev_dbg(gd->gdma_context->dev, 3465 "Auxiliary device added successfully\n"); 3466 return 0; 3467 3468 add_fail: 3469 auxiliary_device_uninit(adev); 3470 3471 init_fail: 3472 mana_adev_idx_free(id); 3473 3474 idx_fail: 3475 kfree(madev); 3476 3477 return ret; 3478 } 3479 3480 static void mana_rdma_service_handle(struct work_struct *work) 3481 { 3482 struct mana_service_work *serv_work = 3483 container_of(work, struct mana_service_work, work); 3484 struct gdma_dev *gd = serv_work->gdma_dev; 3485 struct device *dev = gd->gdma_context->dev; 3486 int ret; 3487 3488 if (READ_ONCE(gd->rdma_teardown)) 3489 goto out; 3490 3491 switch (serv_work->event) { 3492 case GDMA_SERVICE_TYPE_RDMA_SUSPEND: 3493 if (!gd->adev || gd->is_suspended) 3494 break; 3495 3496 remove_adev(gd); 3497 gd->is_suspended = true; 3498 break; 3499 3500 case GDMA_SERVICE_TYPE_RDMA_RESUME: 3501 if (!gd->is_suspended) 3502 break; 3503 3504 ret = add_adev(gd, "rdma"); 3505 if (ret) 3506 dev_err(dev, "Failed to add adev on resume: %d\n", ret); 3507 else 3508 gd->is_suspended = false; 3509 break; 3510 3511 default: 3512 dev_warn(dev, "unknown adev service event %u\n", 3513 serv_work->event); 3514 break; 3515 } 3516 3517 out: 3518 kfree(serv_work); 3519 } 3520 3521 int mana_rdma_service_event(struct gdma_context *gc, enum gdma_service_type event) 3522 { 3523 struct gdma_dev *gd = &gc->mana_ib; 3524 struct mana_service_work *serv_work; 3525 3526 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3527 /* RDMA device is not detected on pci */ 3528 return 0; 3529 } 3530 3531 serv_work = kzalloc_obj(*serv_work, GFP_ATOMIC); 3532 if (!serv_work) 3533 return -ENOMEM; 3534 3535 serv_work->event = event; 3536 serv_work->gdma_dev = gd; 3537 3538 INIT_WORK(&serv_work->work, mana_rdma_service_handle); 3539 queue_work(gc->service_wq, &serv_work->work); 3540 3541 return 0; 3542 } 3543 3544 #define MANA_GF_STATS_PERIOD (2 * HZ) 3545 3546 static void mana_gf_stats_work_handler(struct work_struct *work) 3547 { 3548 struct mana_context *ac = 3549 container_of(to_delayed_work(work), struct mana_context, gf_stats_work); 3550 int err; 3551 3552 err = mana_query_gf_stats(ac); 3553 if (err == -ETIMEDOUT) { 3554 /* HWC timeout detected - reset stats and stop rescheduling */ 3555 ac->hwc_timeout_occurred = true; 3556 memset(&ac->hc_stats, 0, sizeof(ac->hc_stats)); 3557 return; 3558 } 3559 schedule_delayed_work(&ac->gf_stats_work, MANA_GF_STATS_PERIOD); 3560 } 3561 3562 int mana_probe(struct gdma_dev *gd, bool resuming) 3563 { 3564 struct gdma_context *gc = gd->gdma_context; 3565 struct mana_context *ac = gd->driver_data; 3566 struct mana_port_context *apc = NULL; 3567 struct device *dev = gc->dev; 3568 u8 bm_hostmode = 0; 3569 u16 num_ports = 0; 3570 int err; 3571 int i; 3572 3573 dev_info(dev, 3574 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 3575 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 3576 3577 err = mana_gd_register_device(gd); 3578 if (err) 3579 return err; 3580 3581 if (!resuming) { 3582 ac = kzalloc_obj(*ac); 3583 if (!ac) 3584 return -ENOMEM; 3585 3586 ac->gdma_dev = gd; 3587 gd->driver_data = ac; 3588 } 3589 3590 err = mana_create_eq(ac); 3591 if (err) { 3592 dev_err(dev, "Failed to create EQs: %d\n", err); 3593 goto out; 3594 } 3595 3596 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 3597 MANA_MICRO_VERSION, &num_ports, &bm_hostmode); 3598 if (err) 3599 goto out; 3600 3601 ac->bm_hostmode = bm_hostmode; 3602 3603 if (!resuming) { 3604 ac->num_ports = num_ports; 3605 3606 INIT_WORK(&ac->link_change_work, mana_link_state_handle); 3607 } else { 3608 if (ac->num_ports != num_ports) { 3609 dev_err(dev, "The number of vPorts changed: %d->%d\n", 3610 ac->num_ports, num_ports); 3611 err = -EPROTO; 3612 goto out; 3613 } 3614 3615 enable_work(&ac->link_change_work); 3616 } 3617 3618 if (ac->num_ports == 0) 3619 dev_err(dev, "Failed to detect any vPort\n"); 3620 3621 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 3622 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 3623 3624 ac->per_port_queue_reset_wq = 3625 create_singlethread_workqueue("mana_per_port_queue_reset_wq"); 3626 if (!ac->per_port_queue_reset_wq) { 3627 dev_err(dev, "Failed to allocate per port queue reset workqueue\n"); 3628 err = -ENOMEM; 3629 goto out; 3630 } 3631 3632 if (!resuming) { 3633 for (i = 0; i < ac->num_ports; i++) { 3634 err = mana_probe_port(ac, i, &ac->ports[i]); 3635 /* we log the port for which the probe failed and stop 3636 * probes for subsequent ports. 3637 * Note that we keep running ports, for which the probes 3638 * were successful, unless add_adev fails too 3639 */ 3640 if (err) { 3641 dev_err(dev, "Probe Failed for port %d\n", i); 3642 break; 3643 } 3644 } 3645 } else { 3646 for (i = 0; i < ac->num_ports; i++) { 3647 rtnl_lock(); 3648 apc = netdev_priv(ac->ports[i]); 3649 enable_work(&apc->queue_reset_work); 3650 err = mana_attach(ac->ports[i]); 3651 rtnl_unlock(); 3652 /* we log the port for which the attach failed and stop 3653 * attach for subsequent ports 3654 * Note that we keep running ports, for which the attach 3655 * were successful, unless add_adev fails too 3656 */ 3657 if (err) { 3658 dev_err(dev, "Attach Failed for port %d\n", i); 3659 break; 3660 } 3661 } 3662 } 3663 3664 err = add_adev(gd, "eth"); 3665 3666 INIT_DELAYED_WORK(&ac->gf_stats_work, mana_gf_stats_work_handler); 3667 schedule_delayed_work(&ac->gf_stats_work, MANA_GF_STATS_PERIOD); 3668 3669 out: 3670 if (err) { 3671 mana_remove(gd, false); 3672 } else { 3673 dev_dbg(dev, "gd=%p, id=%u, num_ports=%d, type=%u, instance=%u\n", 3674 gd, gd->dev_id.as_uint32, ac->num_ports, 3675 gd->dev_id.type, gd->dev_id.instance); 3676 dev_dbg(dev, "%s succeeded\n", __func__); 3677 } 3678 3679 return err; 3680 } 3681 3682 void mana_remove(struct gdma_dev *gd, bool suspending) 3683 { 3684 struct gdma_context *gc = gd->gdma_context; 3685 struct mana_context *ac = gd->driver_data; 3686 struct mana_port_context *apc; 3687 struct device *dev = gc->dev; 3688 struct net_device *ndev; 3689 int err; 3690 int i; 3691 3692 disable_work_sync(&ac->link_change_work); 3693 cancel_delayed_work_sync(&ac->gf_stats_work); 3694 3695 /* adev currently doesn't support suspending, always remove it */ 3696 if (gd->adev) 3697 remove_adev(gd); 3698 3699 for (i = 0; i < ac->num_ports; i++) { 3700 ndev = ac->ports[i]; 3701 if (!ndev) { 3702 if (i == 0) 3703 dev_err(dev, "No net device to remove\n"); 3704 goto out; 3705 } 3706 3707 apc = netdev_priv(ndev); 3708 disable_work_sync(&apc->queue_reset_work); 3709 3710 /* All cleanup actions should stay after rtnl_lock(), otherwise 3711 * other functions may access partially cleaned up data. 3712 */ 3713 rtnl_lock(); 3714 3715 err = mana_detach(ndev, false); 3716 if (err) 3717 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 3718 i, err); 3719 3720 if (suspending) { 3721 /* No need to unregister the ndev. */ 3722 rtnl_unlock(); 3723 continue; 3724 } 3725 3726 unregister_netdevice(ndev); 3727 mana_cleanup_indir_table(apc); 3728 3729 rtnl_unlock(); 3730 3731 free_netdev(ndev); 3732 } 3733 3734 mana_destroy_eq(ac); 3735 out: 3736 if (ac->per_port_queue_reset_wq) { 3737 destroy_workqueue(ac->per_port_queue_reset_wq); 3738 ac->per_port_queue_reset_wq = NULL; 3739 } 3740 3741 mana_gd_deregister_device(gd); 3742 3743 if (suspending) 3744 return; 3745 3746 gd->driver_data = NULL; 3747 gd->gdma_context = NULL; 3748 kfree(ac); 3749 dev_dbg(dev, "%s succeeded\n", __func__); 3750 } 3751 3752 int mana_rdma_probe(struct gdma_dev *gd) 3753 { 3754 int err = 0; 3755 3756 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3757 /* RDMA device is not detected on pci */ 3758 return err; 3759 } 3760 3761 err = mana_gd_register_device(gd); 3762 if (err) 3763 return err; 3764 3765 err = add_adev(gd, "rdma"); 3766 if (err) 3767 mana_gd_deregister_device(gd); 3768 3769 return err; 3770 } 3771 3772 void mana_rdma_remove(struct gdma_dev *gd) 3773 { 3774 struct gdma_context *gc = gd->gdma_context; 3775 3776 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3777 /* RDMA device is not detected on pci */ 3778 return; 3779 } 3780 3781 WRITE_ONCE(gd->rdma_teardown, true); 3782 3783 if (gc->service_wq) 3784 flush_workqueue(gc->service_wq); 3785 3786 if (gd->adev) 3787 remove_adev(gd); 3788 3789 mana_gd_deregister_device(gd); 3790 } 3791 3792 struct net_device *mana_get_primary_netdev(struct mana_context *ac, 3793 u32 port_index, 3794 netdevice_tracker *tracker) 3795 { 3796 struct net_device *ndev; 3797 3798 if (port_index >= ac->num_ports) 3799 return NULL; 3800 3801 rcu_read_lock(); 3802 3803 /* If mana is used in netvsc, the upper netdevice should be returned. */ 3804 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]); 3805 3806 /* If there is no upper device, use the parent Ethernet device */ 3807 if (!ndev) 3808 ndev = ac->ports[port_index]; 3809 3810 netdev_hold(ndev, tracker, GFP_ATOMIC); 3811 rcu_read_unlock(); 3812 3813 return ndev; 3814 } 3815 EXPORT_SYMBOL_NS(mana_get_primary_netdev, "NET_MANA"); 3816