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 (test_bit(GC_IN_SERVICE, &gc->flags)) 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, "Command 0x%x failed with status: 0x%x, err: %d\n", 1032 req->req.msg_type, resp->status, err); 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 if (resp.adapter_mtu < ETH_MIN_MTU + ETH_HLEN) { 1219 dev_err(dev, "Adapter MTU too small: %u\n", 1220 resp.adapter_mtu); 1221 return -EPROTO; 1222 } 1223 gc->adapter_mtu = resp.adapter_mtu; 1224 } else { 1225 gc->adapter_mtu = ETH_FRAME_LEN; 1226 } 1227 1228 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V3) 1229 *bm_hostmode = resp.bm_hostmode; 1230 else 1231 *bm_hostmode = 0; 1232 1233 debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc->adapter_mtu); 1234 1235 return 0; 1236 } 1237 1238 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 1239 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 1240 { 1241 struct mana_query_vport_cfg_resp resp = {}; 1242 struct mana_query_vport_cfg_req req = {}; 1243 int err; 1244 1245 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 1246 sizeof(req), sizeof(resp)); 1247 1248 req.vport_index = vport_index; 1249 1250 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1251 sizeof(resp)); 1252 if (err) 1253 return err; 1254 1255 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 1256 sizeof(resp)); 1257 if (err) 1258 return err; 1259 1260 if (resp.hdr.status) 1261 return -EPROTO; 1262 1263 *max_sq = resp.max_num_sq; 1264 *max_rq = resp.max_num_rq; 1265 if (resp.num_indirection_ent > 0 && 1266 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE && 1267 is_power_of_2(resp.num_indirection_ent)) { 1268 *num_indir_entry = resp.num_indirection_ent; 1269 } else { 1270 netdev_warn(apc->ndev, 1271 "Setting indirection table size to default %d for vPort %d\n", 1272 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx); 1273 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE; 1274 } 1275 1276 apc->port_handle = resp.vport; 1277 ether_addr_copy(apc->mac_addr, resp.mac_addr); 1278 1279 return 0; 1280 } 1281 1282 void mana_uncfg_vport(struct mana_port_context *apc) 1283 { 1284 mutex_lock(&apc->vport_mutex); 1285 apc->vport_use_count--; 1286 WARN_ON(apc->vport_use_count < 0); 1287 mutex_unlock(&apc->vport_mutex); 1288 } 1289 EXPORT_SYMBOL_NS(mana_uncfg_vport, "NET_MANA"); 1290 1291 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 1292 u32 doorbell_pg_id) 1293 { 1294 struct mana_config_vport_resp resp = {}; 1295 struct mana_config_vport_req req = {}; 1296 int err; 1297 1298 /* This function is used to program the Ethernet port in the hardware 1299 * table. It can be called from the Ethernet driver or the RDMA driver. 1300 * 1301 * For Ethernet usage, the hardware supports only one active user on a 1302 * physical port. The driver checks on the port usage before programming 1303 * the hardware when creating the RAW QP (RDMA driver) or exposing the 1304 * device to kernel NET layer (Ethernet driver). 1305 * 1306 * Because the RDMA driver doesn't know in advance which QP type the 1307 * user will create, it exposes the device with all its ports. The user 1308 * may not be able to create RAW QP on a port if this port is already 1309 * in used by the Ethernet driver from the kernel. 1310 * 1311 * This physical port limitation only applies to the RAW QP. For RC QP, 1312 * the hardware doesn't have this limitation. The user can create RC 1313 * QPs on a physical port up to the hardware limits independent of the 1314 * Ethernet usage on the same port. 1315 */ 1316 mutex_lock(&apc->vport_mutex); 1317 if (apc->vport_use_count > 0) { 1318 mutex_unlock(&apc->vport_mutex); 1319 return -EBUSY; 1320 } 1321 apc->vport_use_count++; 1322 mutex_unlock(&apc->vport_mutex); 1323 1324 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1325 sizeof(req), sizeof(resp)); 1326 req.vport = apc->port_handle; 1327 req.pdid = protection_dom_id; 1328 req.doorbell_pageid = doorbell_pg_id; 1329 1330 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1331 sizeof(resp)); 1332 if (err) { 1333 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1334 goto out; 1335 } 1336 1337 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1338 sizeof(resp)); 1339 if (err || resp.hdr.status) { 1340 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1341 err, resp.hdr.status); 1342 if (!err) 1343 err = -EPROTO; 1344 1345 goto out; 1346 } 1347 1348 apc->tx_shortform_allowed = resp.short_form_allowed; 1349 apc->tx_vp_offset = resp.tx_vport_offset; 1350 1351 netdev_info(apc->ndev, "Enabled vPort %llu PD %u DB %u MAC %pM\n", 1352 apc->port_handle, protection_dom_id, doorbell_pg_id, apc->mac_addr); 1353 out: 1354 if (err) 1355 mana_uncfg_vport(apc); 1356 1357 return err; 1358 } 1359 EXPORT_SYMBOL_NS(mana_cfg_vport, "NET_MANA"); 1360 1361 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1362 enum TRI_STATE rx, 1363 bool update_default_rxobj, bool update_key, 1364 bool update_tab) 1365 { 1366 struct mana_cfg_rx_steer_req_v2 *req; 1367 struct mana_cfg_rx_steer_resp resp = {}; 1368 struct net_device *ndev = apc->ndev; 1369 u32 req_buf_size; 1370 int err; 1371 1372 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz); 1373 req = kzalloc(req_buf_size, GFP_KERNEL); 1374 if (!req) 1375 return -ENOMEM; 1376 1377 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1378 sizeof(resp)); 1379 1380 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1381 req->hdr.resp.msg_version = GDMA_MESSAGE_V2; 1382 1383 req->vport = apc->port_handle; 1384 req->num_indir_entries = apc->indir_table_sz; 1385 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, 1386 indir_tab); 1387 req->rx_enable = rx; 1388 req->rss_enable = apc->rss_state; 1389 req->update_default_rxobj = update_default_rxobj; 1390 req->update_hashkey = update_key; 1391 req->update_indir_tab = update_tab; 1392 req->default_rxobj = apc->default_rxobj; 1393 1394 if (rx != TRI_STATE_FALSE) 1395 req->cqe_coalescing_enable = apc->cqe_coalescing_enable; 1396 1397 if (update_key) 1398 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1399 1400 if (update_tab) 1401 memcpy(req->indir_tab, apc->rxobj_table, 1402 flex_array_size(req, indir_tab, req->num_indir_entries)); 1403 1404 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1405 sizeof(resp)); 1406 if (err) { 1407 if (mana_en_need_log(apc, err)) 1408 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1409 1410 goto out; 1411 } 1412 1413 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1414 sizeof(resp)); 1415 if (err) { 1416 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1417 goto out; 1418 } 1419 1420 if (resp.hdr.status) { 1421 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1422 resp.hdr.status); 1423 err = -EPROTO; 1424 goto out; 1425 } 1426 1427 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V2) 1428 apc->cqe_coalescing_timeout_ns = 1429 resp.cqe_coalescing_timeout_ns; 1430 1431 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1432 apc->port_handle, apc->indir_table_sz); 1433 out: 1434 kfree(req); 1435 return err; 1436 } 1437 1438 int mana_query_link_cfg(struct mana_port_context *apc) 1439 { 1440 struct net_device *ndev = apc->ndev; 1441 struct mana_query_link_config_resp resp = {}; 1442 struct mana_query_link_config_req req = {}; 1443 int err; 1444 1445 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_LINK_CONFIG, 1446 sizeof(req), sizeof(resp)); 1447 1448 req.vport = apc->port_handle; 1449 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 1450 1451 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1452 sizeof(resp)); 1453 1454 if (err) { 1455 if (err == -EOPNOTSUPP) { 1456 netdev_info_once(ndev, "MANA_QUERY_LINK_CONFIG not supported\n"); 1457 return err; 1458 } 1459 netdev_err(ndev, "Failed to query link config: %d\n", err); 1460 return err; 1461 } 1462 1463 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_LINK_CONFIG, 1464 sizeof(resp)); 1465 1466 if (err || resp.hdr.status) { 1467 netdev_err(ndev, "Failed to query link config: %d, 0x%x\n", err, 1468 resp.hdr.status); 1469 if (!err) 1470 err = -EOPNOTSUPP; 1471 return err; 1472 } 1473 1474 if (resp.qos_unconfigured) { 1475 err = -EINVAL; 1476 return err; 1477 } 1478 apc->speed = resp.link_speed_mbps; 1479 apc->max_speed = resp.qos_speed_mbps; 1480 return 0; 1481 } 1482 1483 int mana_set_bw_clamp(struct mana_port_context *apc, u32 speed, 1484 int enable_clamping) 1485 { 1486 struct mana_set_bw_clamp_resp resp = {}; 1487 struct mana_set_bw_clamp_req req = {}; 1488 struct net_device *ndev = apc->ndev; 1489 int err; 1490 1491 mana_gd_init_req_hdr(&req.hdr, MANA_SET_BW_CLAMP, 1492 sizeof(req), sizeof(resp)); 1493 req.vport = apc->port_handle; 1494 req.link_speed_mbps = speed; 1495 req.enable_clamping = enable_clamping; 1496 1497 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1498 sizeof(resp)); 1499 1500 if (err) { 1501 if (err == -EOPNOTSUPP) { 1502 netdev_info_once(ndev, "MANA_SET_BW_CLAMP not supported\n"); 1503 return err; 1504 } 1505 netdev_err(ndev, "Failed to set bandwidth clamp for speed %u, err = %d", 1506 speed, err); 1507 return err; 1508 } 1509 1510 err = mana_verify_resp_hdr(&resp.hdr, MANA_SET_BW_CLAMP, 1511 sizeof(resp)); 1512 1513 if (err || resp.hdr.status) { 1514 netdev_err(ndev, "Failed to set bandwidth clamp: %d, 0x%x\n", err, 1515 resp.hdr.status); 1516 if (!err) 1517 err = -EOPNOTSUPP; 1518 return err; 1519 } 1520 1521 if (resp.qos_unconfigured) 1522 netdev_info(ndev, "QoS is unconfigured\n"); 1523 1524 return 0; 1525 } 1526 1527 int mana_create_wq_obj(struct mana_port_context *apc, 1528 mana_handle_t vport, 1529 u32 wq_type, struct mana_obj_spec *wq_spec, 1530 struct mana_obj_spec *cq_spec, 1531 mana_handle_t *wq_obj) 1532 { 1533 struct mana_create_wqobj_resp resp = {}; 1534 struct mana_create_wqobj_req req = {}; 1535 struct net_device *ndev = apc->ndev; 1536 int err; 1537 1538 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1539 sizeof(req), sizeof(resp)); 1540 req.vport = vport; 1541 req.wq_type = wq_type; 1542 req.wq_gdma_region = wq_spec->gdma_region; 1543 req.cq_gdma_region = cq_spec->gdma_region; 1544 req.wq_size = wq_spec->queue_size; 1545 req.cq_size = cq_spec->queue_size; 1546 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1547 req.cq_parent_qid = cq_spec->attached_eq; 1548 1549 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1550 sizeof(resp)); 1551 if (err) { 1552 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1553 goto out; 1554 } 1555 1556 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1557 sizeof(resp)); 1558 if (err || resp.hdr.status) { 1559 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1560 resp.hdr.status); 1561 if (!err) 1562 err = -EPROTO; 1563 goto out; 1564 } 1565 1566 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1567 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1568 err = -EPROTO; 1569 goto out; 1570 } 1571 1572 *wq_obj = resp.wq_obj; 1573 wq_spec->queue_index = resp.wq_id; 1574 cq_spec->queue_index = resp.cq_id; 1575 1576 return 0; 1577 out: 1578 return err; 1579 } 1580 EXPORT_SYMBOL_NS(mana_create_wq_obj, "NET_MANA"); 1581 1582 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1583 mana_handle_t wq_obj) 1584 { 1585 struct mana_destroy_wqobj_resp resp = {}; 1586 struct mana_destroy_wqobj_req req = {}; 1587 struct net_device *ndev = apc->ndev; 1588 int err; 1589 1590 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1591 sizeof(req), sizeof(resp)); 1592 req.wq_type = wq_type; 1593 req.wq_obj_handle = wq_obj; 1594 1595 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1596 sizeof(resp)); 1597 if (err) { 1598 if (mana_en_need_log(apc, err)) 1599 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1600 1601 return; 1602 } 1603 1604 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1605 sizeof(resp)); 1606 if (err || resp.hdr.status) 1607 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1608 resp.hdr.status); 1609 } 1610 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, "NET_MANA"); 1611 1612 static void mana_destroy_eq(struct mana_context *ac) 1613 { 1614 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1615 struct gdma_queue *eq; 1616 int i; 1617 1618 if (!ac->eqs) 1619 return; 1620 1621 debugfs_remove_recursive(ac->mana_eqs_debugfs); 1622 ac->mana_eqs_debugfs = NULL; 1623 1624 for (i = 0; i < gc->max_num_queues; i++) { 1625 eq = ac->eqs[i].eq; 1626 if (!eq) 1627 continue; 1628 1629 mana_gd_destroy_queue(gc, eq); 1630 } 1631 1632 kfree(ac->eqs); 1633 ac->eqs = NULL; 1634 } 1635 1636 static void mana_create_eq_debugfs(struct mana_context *ac, int i) 1637 { 1638 struct mana_eq eq = ac->eqs[i]; 1639 char eqnum[32]; 1640 1641 sprintf(eqnum, "eq%d", i); 1642 eq.mana_eq_debugfs = debugfs_create_dir(eqnum, ac->mana_eqs_debugfs); 1643 debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head); 1644 debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail); 1645 debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops); 1646 } 1647 1648 static int mana_create_eq(struct mana_context *ac) 1649 { 1650 struct gdma_dev *gd = ac->gdma_dev; 1651 struct gdma_context *gc = gd->gdma_context; 1652 struct gdma_queue_spec spec = {}; 1653 int err; 1654 int i; 1655 1656 ac->eqs = kzalloc_objs(struct mana_eq, gc->max_num_queues); 1657 if (!ac->eqs) 1658 return -ENOMEM; 1659 1660 spec.type = GDMA_EQ; 1661 spec.monitor_avl_buf = false; 1662 spec.queue_size = EQ_SIZE; 1663 spec.eq.callback = NULL; 1664 spec.eq.context = ac->eqs; 1665 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1666 1667 ac->mana_eqs_debugfs = debugfs_create_dir("EQs", gc->mana_pci_debugfs); 1668 1669 for (i = 0; i < gc->max_num_queues; i++) { 1670 spec.eq.msix_index = (i + 1) % gc->num_msix_usable; 1671 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1672 if (err) { 1673 dev_err(gc->dev, "Failed to create EQ %d : %d\n", i, err); 1674 goto out; 1675 } 1676 mana_create_eq_debugfs(ac, i); 1677 } 1678 1679 return 0; 1680 out: 1681 mana_destroy_eq(ac); 1682 return err; 1683 } 1684 1685 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1686 { 1687 struct mana_fence_rq_resp resp = {}; 1688 struct mana_fence_rq_req req = {}; 1689 int err; 1690 1691 init_completion(&rxq->fence_event); 1692 1693 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1694 sizeof(req), sizeof(resp)); 1695 req.wq_obj_handle = rxq->rxobj; 1696 1697 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1698 sizeof(resp)); 1699 if (err) { 1700 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1701 rxq->rxq_idx, err); 1702 return err; 1703 } 1704 1705 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1706 if (err || resp.hdr.status) { 1707 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1708 rxq->rxq_idx, err, resp.hdr.status); 1709 if (!err) 1710 err = -EPROTO; 1711 1712 return err; 1713 } 1714 1715 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1716 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1717 rxq->rxq_idx); 1718 return -ETIMEDOUT; 1719 } 1720 1721 return 0; 1722 } 1723 1724 static void mana_fence_rqs(struct mana_port_context *apc) 1725 { 1726 unsigned int rxq_idx; 1727 struct mana_rxq *rxq; 1728 int err; 1729 1730 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1731 rxq = apc->rxqs[rxq_idx]; 1732 err = mana_fence_rq(apc, rxq); 1733 1734 /* In case of any error, use sleep instead. */ 1735 if (err) 1736 msleep(100); 1737 } 1738 } 1739 1740 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1741 { 1742 u32 used_space_old; 1743 u32 used_space_new; 1744 1745 used_space_old = wq->head - wq->tail; 1746 used_space_new = wq->head - (wq->tail + num_units); 1747 1748 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1749 return -ERANGE; 1750 1751 wq->tail += num_units; 1752 return 0; 1753 } 1754 1755 void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1756 { 1757 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1758 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1759 struct device *dev = gc->dev; 1760 int hsg, i; 1761 1762 /* Number of SGEs of linear part */ 1763 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1764 1765 for (i = 0; i < hsg; i++) 1766 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1767 DMA_TO_DEVICE); 1768 1769 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1770 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1771 DMA_TO_DEVICE); 1772 } 1773 1774 static void mana_poll_tx_cq(struct mana_cq *cq) 1775 { 1776 struct gdma_comp *completions = cq->gdma_comp_buf; 1777 struct gdma_posted_wqe_info *wqe_info; 1778 unsigned int pkt_transmitted = 0; 1779 unsigned int wqe_unit_cnt = 0; 1780 struct mana_txq *txq = cq->txq; 1781 struct mana_port_context *apc; 1782 struct netdev_queue *net_txq; 1783 struct gdma_queue *gdma_wq; 1784 unsigned int avail_space; 1785 struct net_device *ndev; 1786 struct sk_buff *skb; 1787 bool txq_stopped; 1788 int comp_read; 1789 int i; 1790 1791 ndev = txq->ndev; 1792 apc = netdev_priv(ndev); 1793 1794 /* Limit CQEs polled to 4 wraparounds of the CQ to ensure the 1795 * doorbell can be rung in time for the hardware's requirement 1796 * of at least one doorbell ring every 8 wraparounds. 1797 */ 1798 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1799 min((cq->gdma_cq->queue_size / 1800 COMP_ENTRY_SIZE) * 4, 1801 CQE_POLLING_BUFFER)); 1802 1803 if (comp_read < 1) 1804 return; 1805 1806 for (i = 0; i < comp_read; i++) { 1807 struct mana_tx_comp_oob *cqe_oob; 1808 1809 if (WARN_ON_ONCE(!completions[i].is_sq)) 1810 return; 1811 1812 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1813 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1814 MANA_CQE_COMPLETION)) 1815 return; 1816 1817 switch (cqe_oob->cqe_hdr.cqe_type) { 1818 case CQE_TX_OKAY: 1819 break; 1820 1821 case CQE_TX_SA_DROP: 1822 case CQE_TX_MTU_DROP: 1823 case CQE_TX_INVALID_OOB: 1824 case CQE_TX_INVALID_ETH_TYPE: 1825 case CQE_TX_HDR_PROCESSING_ERROR: 1826 case CQE_TX_VF_DISABLED: 1827 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1828 case CQE_TX_VPORT_DISABLED: 1829 case CQE_TX_VLAN_TAGGING_VIOLATION: 1830 if (net_ratelimit()) 1831 netdev_err(ndev, "TX: CQE error %d\n", 1832 cqe_oob->cqe_hdr.cqe_type); 1833 1834 apc->eth_stats.tx_cqe_err++; 1835 break; 1836 1837 default: 1838 /* If the CQE type is unknown, log an error, 1839 * and still free the SKB, update tail, etc. 1840 */ 1841 if (net_ratelimit()) 1842 netdev_err(ndev, "TX: unknown CQE type %d\n", 1843 cqe_oob->cqe_hdr.cqe_type); 1844 1845 apc->eth_stats.tx_cqe_unknown_type++; 1846 break; 1847 } 1848 1849 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1850 return; 1851 1852 skb = skb_dequeue(&txq->pending_skbs); 1853 if (WARN_ON_ONCE(!skb)) 1854 return; 1855 1856 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1857 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1858 1859 mana_unmap_skb(skb, apc); 1860 1861 napi_consume_skb(skb, cq->budget); 1862 1863 pkt_transmitted++; 1864 } 1865 1866 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1867 return; 1868 1869 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1870 1871 gdma_wq = txq->gdma_sq; 1872 avail_space = mana_gd_wq_avail_space(gdma_wq); 1873 1874 /* Ensure tail updated before checking q stop */ 1875 smp_mb(); 1876 1877 net_txq = txq->net_txq; 1878 txq_stopped = netif_tx_queue_stopped(net_txq); 1879 1880 /* Ensure checking txq_stopped before apc->port_is_up. */ 1881 smp_rmb(); 1882 1883 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1884 netif_tx_wake_queue(net_txq); 1885 apc->eth_stats.wake_queue++; 1886 } 1887 1888 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1889 WARN_ON_ONCE(1); 1890 1891 cq->work_done = pkt_transmitted; 1892 } 1893 1894 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1895 { 1896 struct mana_recv_buf_oob *recv_buf_oob; 1897 u32 curr_index; 1898 int err; 1899 1900 curr_index = rxq->buf_index++; 1901 if (rxq->buf_index == rxq->num_rx_buf) 1902 rxq->buf_index = 0; 1903 1904 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1905 1906 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1907 &recv_buf_oob->wqe_inf); 1908 if (WARN_ON_ONCE(err)) 1909 return; 1910 1911 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1912 } 1913 1914 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1915 uint pkt_len, struct xdp_buff *xdp) 1916 { 1917 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1918 1919 if (!skb) 1920 return NULL; 1921 1922 if (xdp->data_hard_start) { 1923 u32 metasize = xdp->data - xdp->data_meta; 1924 1925 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1926 skb_put(skb, xdp->data_end - xdp->data); 1927 if (metasize) 1928 skb_metadata_set(skb, metasize); 1929 return skb; 1930 } 1931 1932 skb_reserve(skb, rxq->headroom); 1933 skb_put(skb, pkt_len); 1934 1935 return skb; 1936 } 1937 1938 static void mana_rx_skb(void *buf_va, bool from_pool, 1939 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq, 1940 int i) 1941 { 1942 struct mana_stats_rx *rx_stats = &rxq->stats; 1943 struct net_device *ndev = rxq->ndev; 1944 uint pkt_len = cqe->ppi[i].pkt_len; 1945 u16 rxq_idx = rxq->rxq_idx; 1946 struct napi_struct *napi; 1947 struct xdp_buff xdp = {}; 1948 struct sk_buff *skb; 1949 u32 hash_value; 1950 u32 act; 1951 1952 rxq->rx_cq.work_done++; 1953 napi = &rxq->rx_cq.napi; 1954 1955 if (!buf_va) { 1956 ++ndev->stats.rx_dropped; 1957 return; 1958 } 1959 1960 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1961 1962 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1963 return; 1964 1965 if (act != XDP_PASS && act != XDP_TX) 1966 goto drop_xdp; 1967 1968 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1969 1970 if (!skb) 1971 goto drop; 1972 1973 if (from_pool) 1974 skb_mark_for_recycle(skb); 1975 1976 skb->dev = napi->dev; 1977 1978 skb->protocol = eth_type_trans(skb, ndev); 1979 skb_checksum_none_assert(skb); 1980 skb_record_rx_queue(skb, rxq_idx); 1981 1982 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1983 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1984 skb->ip_summed = CHECKSUM_UNNECESSARY; 1985 } 1986 1987 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1988 hash_value = cqe->ppi[i].pkt_hash; 1989 1990 if (cqe->rx_hashtype & MANA_HASH_L4) 1991 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1992 else 1993 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1994 } 1995 1996 if (cqe->rx_vlantag_present) { 1997 u16 vlan_tci = cqe->rx_vlan_id; 1998 1999 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 2000 } 2001 2002 u64_stats_update_begin(&rx_stats->syncp); 2003 rx_stats->packets++; 2004 rx_stats->bytes += pkt_len; 2005 2006 if (act == XDP_TX) 2007 rx_stats->xdp_tx++; 2008 u64_stats_update_end(&rx_stats->syncp); 2009 2010 if (act == XDP_TX) { 2011 skb_set_queue_mapping(skb, rxq_idx); 2012 mana_xdp_tx(skb, ndev); 2013 return; 2014 } 2015 2016 napi_gro_receive(napi, skb); 2017 2018 return; 2019 2020 drop_xdp: 2021 u64_stats_update_begin(&rx_stats->syncp); 2022 rx_stats->xdp_drop++; 2023 u64_stats_update_end(&rx_stats->syncp); 2024 2025 drop: 2026 if (from_pool) { 2027 if (rxq->frag_count == 1) 2028 page_pool_recycle_direct(rxq->page_pool, 2029 virt_to_head_page(buf_va)); 2030 else 2031 page_pool_free_va(rxq->page_pool, buf_va, true); 2032 } else { 2033 WARN_ON_ONCE(rxq->xdp_save_va); 2034 /* Save for reuse */ 2035 rxq->xdp_save_va = buf_va; 2036 } 2037 2038 ++ndev->stats.rx_dropped; 2039 2040 return; 2041 } 2042 2043 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 2044 dma_addr_t *da, bool *from_pool) 2045 { 2046 struct page *page; 2047 u32 offset; 2048 void *va; 2049 *from_pool = false; 2050 2051 /* Don't use fragments for jumbo frames or XDP where it's 1 fragment 2052 * per page. 2053 */ 2054 if (rxq->frag_count == 1) { 2055 /* Reuse XDP dropped page if available */ 2056 if (rxq->xdp_save_va) { 2057 va = rxq->xdp_save_va; 2058 page = virt_to_head_page(va); 2059 rxq->xdp_save_va = NULL; 2060 } else { 2061 page = page_pool_dev_alloc_pages(rxq->page_pool); 2062 if (!page) 2063 return NULL; 2064 2065 *from_pool = true; 2066 va = page_to_virt(page); 2067 } 2068 2069 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 2070 DMA_FROM_DEVICE); 2071 if (dma_mapping_error(dev, *da)) { 2072 mana_put_rx_page(rxq, page, *from_pool); 2073 return NULL; 2074 } 2075 2076 return va; 2077 } 2078 2079 page = page_pool_dev_alloc_frag(rxq->page_pool, &offset, 2080 rxq->alloc_size); 2081 if (!page) 2082 return NULL; 2083 2084 va = page_to_virt(page) + offset; 2085 *da = page_pool_get_dma_addr(page) + offset + rxq->headroom; 2086 *from_pool = true; 2087 2088 return va; 2089 } 2090 2091 /* Allocate frag for rx buffer, and save the old buf */ 2092 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 2093 struct mana_recv_buf_oob *rxoob, void **old_buf, 2094 bool *old_fp) 2095 { 2096 bool from_pool; 2097 dma_addr_t da; 2098 void *va; 2099 2100 va = mana_get_rxfrag(rxq, dev, &da, &from_pool); 2101 if (!va) 2102 return; 2103 if (!rxoob->from_pool || rxq->frag_count == 1) 2104 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 2105 DMA_FROM_DEVICE); 2106 *old_buf = rxoob->buf_va; 2107 *old_fp = rxoob->from_pool; 2108 2109 rxoob->buf_va = va; 2110 rxoob->sgl[0].address = da; 2111 rxoob->from_pool = from_pool; 2112 } 2113 2114 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 2115 struct gdma_comp *cqe) 2116 { 2117 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 2118 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 2119 struct net_device *ndev = rxq->ndev; 2120 struct mana_recv_buf_oob *rxbuf_oob; 2121 struct mana_port_context *apc; 2122 struct device *dev = gc->dev; 2123 bool coalesced = false; 2124 void *old_buf = NULL; 2125 u32 curr, pktlen; 2126 bool old_fp; 2127 int i; 2128 2129 apc = netdev_priv(ndev); 2130 2131 switch (oob->cqe_hdr.cqe_type) { 2132 case CQE_RX_OKAY: 2133 break; 2134 2135 case CQE_RX_TRUNCATED: 2136 ++ndev->stats.rx_dropped; 2137 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 2138 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 2139 2140 mana_move_wq_tail(rxq->gdma_rq, 2141 rxbuf_oob->wqe_inf.wqe_size_in_bu); 2142 mana_post_pkt_rxq(rxq); 2143 return; 2144 2145 case CQE_RX_COALESCED_4: 2146 coalesced = true; 2147 break; 2148 2149 case CQE_RX_OBJECT_FENCE: 2150 complete(&rxq->fence_event); 2151 return; 2152 2153 default: 2154 netdev_err(ndev, "Unknown RX CQE type = %d\n", 2155 oob->cqe_hdr.cqe_type); 2156 apc->eth_stats.rx_cqe_unknown_type++; 2157 return; 2158 } 2159 2160 for (i = 0; i < MANA_RXCOMP_OOB_NUM_PPI; i++) { 2161 old_buf = NULL; 2162 pktlen = oob->ppi[i].pkt_len; 2163 if (pktlen == 0) 2164 break; 2165 2166 curr = rxq->buf_index; 2167 rxbuf_oob = &rxq->rx_oobs[curr]; 2168 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 2169 2170 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 2171 2172 /* Unsuccessful refill will have old_buf == NULL. 2173 * In this case, mana_rx_skb() will drop the packet. 2174 */ 2175 mana_rx_skb(old_buf, old_fp, oob, rxq, i); 2176 2177 mana_move_wq_tail(rxq->gdma_rq, 2178 rxbuf_oob->wqe_inf.wqe_size_in_bu); 2179 2180 mana_post_pkt_rxq(rxq); 2181 2182 if (!coalesced) 2183 break; 2184 } 2185 2186 /* Collect coalesced CQE count based on packets processed. 2187 * Coalesced CQEs have at least 2 packets, so index is i - 2. 2188 */ 2189 if (i > 1) { 2190 u64_stats_update_begin(&rxq->stats.syncp); 2191 rxq->stats.coalesced_cqe[i - 2]++; 2192 u64_stats_update_end(&rxq->stats.syncp); 2193 } else if (!i && !pktlen) { 2194 u64_stats_update_begin(&rxq->stats.syncp); 2195 rxq->stats.pkt_len0_err++; 2196 u64_stats_update_end(&rxq->stats.syncp); 2197 netdev_err_once(ndev, 2198 "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 2199 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 2200 } 2201 } 2202 2203 static void mana_poll_rx_cq(struct mana_cq *cq) 2204 { 2205 struct gdma_comp *comp = cq->gdma_comp_buf; 2206 struct mana_rxq *rxq = cq->rxq; 2207 int comp_read, i; 2208 2209 /* Limit CQEs polled to 4 wraparounds of the CQ to ensure the 2210 * doorbell can be rung in time for the hardware's requirement 2211 * of at least one doorbell ring every 8 wraparounds. 2212 */ 2213 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, 2214 min((cq->gdma_cq->queue_size / 2215 COMP_ENTRY_SIZE) * 4, 2216 CQE_POLLING_BUFFER)); 2217 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 2218 2219 rxq->xdp_flush = false; 2220 2221 for (i = 0; i < comp_read; i++) { 2222 if (WARN_ON_ONCE(comp[i].is_sq)) 2223 return; 2224 2225 /* verify recv cqe references the right rxq */ 2226 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 2227 return; 2228 2229 mana_process_rx_cqe(rxq, cq, &comp[i]); 2230 } 2231 2232 if (comp_read > 0) { 2233 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 2234 2235 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 2236 } 2237 2238 if (rxq->xdp_flush) 2239 xdp_do_flush(); 2240 } 2241 2242 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 2243 { 2244 struct mana_cq *cq = context; 2245 int w; 2246 2247 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 2248 2249 if (cq->type == MANA_CQ_TYPE_RX) 2250 mana_poll_rx_cq(cq); 2251 else 2252 mana_poll_tx_cq(cq); 2253 2254 w = cq->work_done; 2255 cq->work_done_since_doorbell += w; 2256 2257 if (w < cq->budget) { 2258 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT); 2259 cq->work_done_since_doorbell = 0; 2260 napi_complete_done(&cq->napi, w); 2261 } else if (cq->work_done_since_doorbell >= 2262 (cq->gdma_cq->queue_size / COMP_ENTRY_SIZE) * 4) { 2263 /* MANA hardware requires at least one doorbell ring every 8 2264 * wraparounds of CQ even if there is no need to arm the CQ. 2265 * This driver rings the doorbell as soon as it has processed 2266 * 4 wraparounds. 2267 */ 2268 mana_gd_ring_cq(gdma_queue, 0); 2269 cq->work_done_since_doorbell = 0; 2270 } 2271 2272 return w; 2273 } 2274 2275 static int mana_poll(struct napi_struct *napi, int budget) 2276 { 2277 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 2278 int w; 2279 2280 cq->work_done = 0; 2281 cq->budget = budget; 2282 2283 w = mana_cq_handler(cq, cq->gdma_cq); 2284 2285 return min(w, budget); 2286 } 2287 2288 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 2289 { 2290 struct mana_cq *cq = context; 2291 2292 napi_schedule_irqoff(&cq->napi); 2293 } 2294 2295 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 2296 { 2297 struct gdma_dev *gd = apc->ac->gdma_dev; 2298 2299 if (!cq->gdma_cq) 2300 return; 2301 2302 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 2303 } 2304 2305 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 2306 { 2307 struct gdma_dev *gd = apc->ac->gdma_dev; 2308 2309 if (!txq->gdma_sq) 2310 return; 2311 2312 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 2313 } 2314 2315 static void mana_destroy_txq(struct mana_port_context *apc) 2316 { 2317 struct napi_struct *napi; 2318 int i; 2319 2320 if (!apc->tx_qp) 2321 return; 2322 2323 for (i = 0; i < apc->num_queues; i++) { 2324 debugfs_remove_recursive(apc->tx_qp[i].mana_tx_debugfs); 2325 apc->tx_qp[i].mana_tx_debugfs = NULL; 2326 2327 napi = &apc->tx_qp[i].tx_cq.napi; 2328 if (apc->tx_qp[i].txq.napi_initialized) { 2329 napi_synchronize(napi); 2330 napi_disable_locked(napi); 2331 netif_napi_del_locked(napi); 2332 apc->tx_qp[i].txq.napi_initialized = false; 2333 } 2334 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 2335 2336 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 2337 2338 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 2339 } 2340 2341 kfree(apc->tx_qp); 2342 apc->tx_qp = NULL; 2343 } 2344 2345 static void mana_create_txq_debugfs(struct mana_port_context *apc, int idx) 2346 { 2347 struct mana_tx_qp *tx_qp = &apc->tx_qp[idx]; 2348 char qnum[32]; 2349 2350 sprintf(qnum, "TX-%d", idx); 2351 tx_qp->mana_tx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 2352 debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs, 2353 &tx_qp->txq.gdma_sq->head); 2354 debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs, 2355 &tx_qp->txq.gdma_sq->tail); 2356 debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debugfs, 2357 &tx_qp->txq.pending_skbs.qlen); 2358 debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs, 2359 &tx_qp->tx_cq.gdma_cq->head); 2360 debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs, 2361 &tx_qp->tx_cq.gdma_cq->tail); 2362 debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs, 2363 &tx_qp->tx_cq.budget); 2364 debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs, 2365 tx_qp->txq.gdma_sq, &mana_dbg_q_fops); 2366 debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs, 2367 tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops); 2368 } 2369 2370 static int mana_create_txq(struct mana_port_context *apc, 2371 struct net_device *net) 2372 { 2373 struct mana_context *ac = apc->ac; 2374 struct gdma_dev *gd = ac->gdma_dev; 2375 struct mana_obj_spec wq_spec; 2376 struct mana_obj_spec cq_spec; 2377 struct gdma_queue_spec spec; 2378 struct gdma_context *gc; 2379 struct mana_txq *txq; 2380 struct mana_cq *cq; 2381 u32 txq_size; 2382 u32 cq_size; 2383 int err; 2384 int i; 2385 2386 apc->tx_qp = kzalloc_objs(struct mana_tx_qp, apc->num_queues); 2387 if (!apc->tx_qp) 2388 return -ENOMEM; 2389 2390 /* The minimum size of the WQE is 32 bytes, hence 2391 * apc->tx_queue_size represents the maximum number of WQEs 2392 * the SQ can store. This value is then used to size other queues 2393 * to prevent overflow. 2394 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED, 2395 * as min val of apc->tx_queue_size is 128 and that would make 2396 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size 2397 * are always power of two 2398 */ 2399 txq_size = apc->tx_queue_size * 32; 2400 2401 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE; 2402 2403 gc = gd->gdma_context; 2404 2405 for (i = 0; i < apc->num_queues; i++) { 2406 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 2407 2408 /* Create SQ */ 2409 txq = &apc->tx_qp[i].txq; 2410 2411 u64_stats_init(&txq->stats.syncp); 2412 txq->ndev = net; 2413 txq->net_txq = netdev_get_tx_queue(net, i); 2414 txq->vp_offset = apc->tx_vp_offset; 2415 txq->napi_initialized = false; 2416 skb_queue_head_init(&txq->pending_skbs); 2417 2418 memset(&spec, 0, sizeof(spec)); 2419 spec.type = GDMA_SQ; 2420 spec.monitor_avl_buf = true; 2421 spec.queue_size = txq_size; 2422 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 2423 if (err) 2424 goto out; 2425 2426 /* Create SQ's CQ */ 2427 cq = &apc->tx_qp[i].tx_cq; 2428 cq->type = MANA_CQ_TYPE_TX; 2429 2430 cq->txq = txq; 2431 2432 memset(&spec, 0, sizeof(spec)); 2433 spec.type = GDMA_CQ; 2434 spec.monitor_avl_buf = false; 2435 spec.queue_size = cq_size; 2436 spec.cq.callback = mana_schedule_napi; 2437 spec.cq.parent_eq = ac->eqs[i].eq; 2438 spec.cq.context = cq; 2439 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2440 if (err) 2441 goto out; 2442 2443 memset(&wq_spec, 0, sizeof(wq_spec)); 2444 memset(&cq_spec, 0, sizeof(cq_spec)); 2445 2446 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 2447 wq_spec.queue_size = txq->gdma_sq->queue_size; 2448 2449 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2450 cq_spec.queue_size = cq->gdma_cq->queue_size; 2451 cq_spec.modr_ctx_id = 0; 2452 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2453 2454 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 2455 &wq_spec, &cq_spec, 2456 &apc->tx_qp[i].tx_object); 2457 2458 if (err) 2459 goto out; 2460 2461 txq->gdma_sq->id = wq_spec.queue_index; 2462 cq->gdma_cq->id = cq_spec.queue_index; 2463 2464 txq->gdma_sq->mem_info.dma_region_handle = 2465 GDMA_INVALID_DMA_REGION; 2466 cq->gdma_cq->mem_info.dma_region_handle = 2467 GDMA_INVALID_DMA_REGION; 2468 2469 txq->gdma_txq_id = txq->gdma_sq->id; 2470 2471 cq->gdma_id = cq->gdma_cq->id; 2472 2473 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2474 err = -EINVAL; 2475 goto out; 2476 } 2477 2478 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2479 2480 mana_create_txq_debugfs(apc, i); 2481 2482 set_bit(NAPI_STATE_NO_BUSY_POLL, &cq->napi.state); 2483 netif_napi_add_locked(net, &cq->napi, mana_poll); 2484 napi_enable_locked(&cq->napi); 2485 txq->napi_initialized = true; 2486 2487 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2488 } 2489 2490 return 0; 2491 out: 2492 netdev_err(net, "Failed to create %d TX queues, %d\n", 2493 apc->num_queues, err); 2494 mana_destroy_txq(apc); 2495 return err; 2496 } 2497 2498 static void mana_destroy_rxq(struct mana_port_context *apc, 2499 struct mana_rxq *rxq, bool napi_initialized) 2500 2501 { 2502 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2503 struct mana_recv_buf_oob *rx_oob; 2504 struct device *dev = gc->dev; 2505 struct napi_struct *napi; 2506 struct page *page; 2507 int i; 2508 2509 if (!rxq) 2510 return; 2511 2512 debugfs_remove_recursive(rxq->mana_rx_debugfs); 2513 rxq->mana_rx_debugfs = NULL; 2514 2515 napi = &rxq->rx_cq.napi; 2516 2517 if (napi_initialized) { 2518 napi_synchronize(napi); 2519 2520 napi_disable_locked(napi); 2521 netif_napi_del_locked(napi); 2522 } 2523 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2524 2525 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2526 2527 mana_deinit_cq(apc, &rxq->rx_cq); 2528 2529 if (rxq->xdp_save_va) 2530 put_page(virt_to_head_page(rxq->xdp_save_va)); 2531 2532 for (i = 0; i < rxq->num_rx_buf; i++) { 2533 rx_oob = &rxq->rx_oobs[i]; 2534 2535 if (!rx_oob->buf_va) 2536 continue; 2537 2538 page = virt_to_head_page(rx_oob->buf_va); 2539 2540 if (rxq->frag_count == 1 || !rx_oob->from_pool) { 2541 dma_unmap_single(dev, rx_oob->sgl[0].address, 2542 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2543 mana_put_rx_page(rxq, page, rx_oob->from_pool); 2544 } else { 2545 page_pool_free_va(rxq->page_pool, rx_oob->buf_va, true); 2546 } 2547 2548 rx_oob->buf_va = NULL; 2549 } 2550 2551 page_pool_destroy(rxq->page_pool); 2552 2553 if (rxq->gdma_rq) 2554 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2555 2556 kfree(rxq); 2557 } 2558 2559 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2560 struct mana_rxq *rxq, struct device *dev) 2561 { 2562 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2563 bool from_pool = false; 2564 dma_addr_t da; 2565 void *va; 2566 2567 if (mpc->rxbufs_pre) 2568 va = mana_get_rxbuf_pre(rxq, &da); 2569 else 2570 va = mana_get_rxfrag(rxq, dev, &da, &from_pool); 2571 2572 if (!va) 2573 return -ENOMEM; 2574 2575 rx_oob->buf_va = va; 2576 rx_oob->from_pool = from_pool; 2577 2578 rx_oob->sgl[0].address = da; 2579 rx_oob->sgl[0].size = rxq->datasize; 2580 rx_oob->sgl[0].mem_key = mem_key; 2581 2582 return 0; 2583 } 2584 2585 #define MANA_WQE_HEADER_SIZE 16 2586 #define MANA_WQE_SGE_SIZE 16 2587 2588 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2589 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2590 { 2591 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2592 struct mana_recv_buf_oob *rx_oob; 2593 struct device *dev = gc->dev; 2594 u32 buf_idx; 2595 int ret; 2596 2597 WARN_ON(rxq->datasize == 0); 2598 2599 *rxq_size = 0; 2600 *cq_size = 0; 2601 2602 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2603 rx_oob = &rxq->rx_oobs[buf_idx]; 2604 memset(rx_oob, 0, sizeof(*rx_oob)); 2605 2606 rx_oob->num_sge = 1; 2607 2608 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2609 dev); 2610 if (ret) 2611 return ret; 2612 2613 rx_oob->wqe_req.sgl = rx_oob->sgl; 2614 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2615 rx_oob->wqe_req.inline_oob_size = 0; 2616 rx_oob->wqe_req.inline_oob_data = NULL; 2617 rx_oob->wqe_req.flags = 0; 2618 rx_oob->wqe_req.client_data_unit = 0; 2619 2620 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2621 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2622 *cq_size += COMP_ENTRY_SIZE; 2623 } 2624 2625 return 0; 2626 } 2627 2628 static int mana_push_wqe(struct mana_rxq *rxq) 2629 { 2630 struct mana_recv_buf_oob *rx_oob; 2631 u32 buf_idx; 2632 int err; 2633 2634 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2635 rx_oob = &rxq->rx_oobs[buf_idx]; 2636 2637 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2638 &rx_oob->wqe_inf); 2639 if (err) 2640 return -ENOSPC; 2641 } 2642 2643 return 0; 2644 } 2645 2646 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2647 { 2648 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2649 struct page_pool_params pprm = {}; 2650 int ret; 2651 2652 pprm.pool_size = mpc->rx_queue_size / rxq->frag_count + 1; 2653 pprm.nid = gc->numa_node; 2654 pprm.napi = &rxq->rx_cq.napi; 2655 pprm.netdev = rxq->ndev; 2656 pprm.order = get_order(rxq->alloc_size); 2657 pprm.queue_idx = rxq->rxq_idx; 2658 pprm.dev = gc->dev; 2659 2660 /* Let the page pool do the dma map when page sharing with multiple 2661 * fragments enabled for rx buffers. 2662 */ 2663 if (rxq->frag_count > 1) { 2664 pprm.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; 2665 pprm.max_len = PAGE_SIZE; 2666 pprm.dma_dir = DMA_FROM_DEVICE; 2667 } 2668 2669 rxq->page_pool = page_pool_create(&pprm); 2670 2671 if (IS_ERR(rxq->page_pool)) { 2672 ret = PTR_ERR(rxq->page_pool); 2673 rxq->page_pool = NULL; 2674 return ret; 2675 } 2676 2677 return 0; 2678 } 2679 2680 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2681 u32 rxq_idx, struct mana_eq *eq, 2682 struct net_device *ndev) 2683 { 2684 struct gdma_dev *gd = apc->ac->gdma_dev; 2685 struct mana_obj_spec wq_spec; 2686 struct mana_obj_spec cq_spec; 2687 struct gdma_queue_spec spec; 2688 struct mana_cq *cq = NULL; 2689 struct gdma_context *gc; 2690 u32 cq_size, rq_size; 2691 struct mana_rxq *rxq; 2692 int err; 2693 2694 gc = gd->gdma_context; 2695 2696 rxq = kzalloc_flex(*rxq, rx_oobs, apc->rx_queue_size); 2697 if (!rxq) 2698 return NULL; 2699 2700 rxq->ndev = ndev; 2701 rxq->num_rx_buf = apc->rx_queue_size; 2702 rxq->rxq_idx = rxq_idx; 2703 rxq->rxobj = INVALID_MANA_HANDLE; 2704 2705 mana_get_rxbuf_cfg(apc, ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2706 &rxq->headroom, &rxq->frag_count); 2707 /* Create page pool for RX queue */ 2708 err = mana_create_page_pool(rxq, gc); 2709 if (err) { 2710 netdev_err(ndev, "Create page pool err:%d\n", err); 2711 goto out; 2712 } 2713 2714 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2715 if (err) 2716 goto out; 2717 2718 rq_size = MANA_PAGE_ALIGN(rq_size); 2719 cq_size = MANA_PAGE_ALIGN(cq_size); 2720 2721 /* Create RQ */ 2722 memset(&spec, 0, sizeof(spec)); 2723 spec.type = GDMA_RQ; 2724 spec.monitor_avl_buf = true; 2725 spec.queue_size = rq_size; 2726 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2727 if (err) 2728 goto out; 2729 2730 /* Create RQ's CQ */ 2731 cq = &rxq->rx_cq; 2732 cq->type = MANA_CQ_TYPE_RX; 2733 cq->rxq = rxq; 2734 2735 memset(&spec, 0, sizeof(spec)); 2736 spec.type = GDMA_CQ; 2737 spec.monitor_avl_buf = false; 2738 spec.queue_size = cq_size; 2739 spec.cq.callback = mana_schedule_napi; 2740 spec.cq.parent_eq = eq->eq; 2741 spec.cq.context = cq; 2742 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2743 if (err) 2744 goto out; 2745 2746 memset(&wq_spec, 0, sizeof(wq_spec)); 2747 memset(&cq_spec, 0, sizeof(cq_spec)); 2748 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2749 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2750 2751 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2752 cq_spec.queue_size = cq->gdma_cq->queue_size; 2753 cq_spec.modr_ctx_id = 0; 2754 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2755 2756 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2757 &wq_spec, &cq_spec, &rxq->rxobj); 2758 if (err) 2759 goto out; 2760 2761 rxq->gdma_rq->id = wq_spec.queue_index; 2762 cq->gdma_cq->id = cq_spec.queue_index; 2763 2764 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2765 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2766 2767 rxq->gdma_id = rxq->gdma_rq->id; 2768 cq->gdma_id = cq->gdma_cq->id; 2769 2770 err = mana_push_wqe(rxq); 2771 if (err) 2772 goto out; 2773 2774 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2775 err = -EINVAL; 2776 goto out; 2777 } 2778 2779 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2780 2781 netif_napi_add_weight_locked(ndev, &cq->napi, mana_poll, 1); 2782 2783 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2784 cq->napi.napi_id)); 2785 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2786 rxq->page_pool)); 2787 2788 napi_enable_locked(&cq->napi); 2789 2790 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2791 out: 2792 if (!err) 2793 return rxq; 2794 2795 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2796 2797 mana_destroy_rxq(apc, rxq, false); 2798 2799 if (cq) 2800 mana_deinit_cq(apc, cq); 2801 2802 return NULL; 2803 } 2804 2805 static void mana_create_rxq_debugfs(struct mana_port_context *apc, int idx) 2806 { 2807 struct mana_rxq *rxq; 2808 char qnum[32]; 2809 2810 rxq = apc->rxqs[idx]; 2811 2812 sprintf(qnum, "RX-%d", idx); 2813 rxq->mana_rx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 2814 debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->head); 2815 debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->tail); 2816 debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->num_rx_buf); 2817 debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs, 2818 &rxq->rx_cq.gdma_cq->head); 2819 debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs, 2820 &rxq->rx_cq.gdma_cq->tail); 2821 debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq->rx_cq.budget); 2822 debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->gdma_rq, &mana_dbg_q_fops); 2823 debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->rx_cq.gdma_cq, 2824 &mana_dbg_q_fops); 2825 } 2826 2827 static int mana_add_rx_queues(struct mana_port_context *apc, 2828 struct net_device *ndev) 2829 { 2830 struct mana_context *ac = apc->ac; 2831 struct mana_rxq *rxq; 2832 int err = 0; 2833 int i; 2834 2835 for (i = 0; i < apc->num_queues; i++) { 2836 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2837 if (!rxq) { 2838 err = -ENOMEM; 2839 netdev_err(ndev, "Failed to create rxq %d : %d\n", i, err); 2840 goto out; 2841 } 2842 2843 u64_stats_init(&rxq->stats.syncp); 2844 2845 apc->rxqs[i] = rxq; 2846 2847 mana_create_rxq_debugfs(apc, i); 2848 } 2849 2850 apc->default_rxobj = apc->rxqs[0]->rxobj; 2851 out: 2852 return err; 2853 } 2854 2855 static void mana_destroy_vport(struct mana_port_context *apc) 2856 { 2857 struct gdma_dev *gd = apc->ac->gdma_dev; 2858 struct mana_rxq *rxq; 2859 u32 rxq_idx; 2860 2861 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2862 rxq = apc->rxqs[rxq_idx]; 2863 if (!rxq) 2864 continue; 2865 2866 mana_destroy_rxq(apc, rxq, true); 2867 apc->rxqs[rxq_idx] = NULL; 2868 } 2869 2870 mana_destroy_txq(apc); 2871 mana_uncfg_vport(apc); 2872 2873 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) 2874 mana_pf_deregister_hw_vport(apc); 2875 } 2876 2877 static int mana_create_vport(struct mana_port_context *apc, 2878 struct net_device *net) 2879 { 2880 struct gdma_dev *gd = apc->ac->gdma_dev; 2881 int err; 2882 2883 apc->default_rxobj = INVALID_MANA_HANDLE; 2884 2885 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) { 2886 err = mana_pf_register_hw_vport(apc); 2887 if (err) 2888 return err; 2889 } 2890 2891 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2892 if (err) 2893 return err; 2894 2895 return mana_create_txq(apc, net); 2896 } 2897 2898 static int mana_rss_table_alloc(struct mana_port_context *apc) 2899 { 2900 if (!apc->indir_table_sz) { 2901 netdev_err(apc->ndev, 2902 "Indirection table size not set for vPort %d\n", 2903 apc->port_idx); 2904 return -EINVAL; 2905 } 2906 2907 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL); 2908 if (!apc->indir_table) 2909 return -ENOMEM; 2910 2911 apc->rxobj_table = kzalloc_objs(mana_handle_t, apc->indir_table_sz); 2912 if (!apc->rxobj_table) { 2913 kfree(apc->indir_table); 2914 return -ENOMEM; 2915 } 2916 2917 return 0; 2918 } 2919 2920 static void mana_rss_table_init(struct mana_port_context *apc) 2921 { 2922 int i; 2923 2924 for (i = 0; i < apc->indir_table_sz; i++) 2925 apc->indir_table[i] = 2926 ethtool_rxfh_indir_default(i, apc->num_queues); 2927 } 2928 2929 int mana_disable_vport_rx(struct mana_port_context *apc) 2930 { 2931 return mana_cfg_vport_steering(apc, TRI_STATE_FALSE, false, false, 2932 false); 2933 } 2934 EXPORT_SYMBOL_NS(mana_disable_vport_rx, "NET_MANA"); 2935 2936 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2937 bool update_hash, bool update_tab) 2938 { 2939 u32 queue_idx; 2940 int err; 2941 int i; 2942 2943 if (update_tab) { 2944 for (i = 0; i < apc->indir_table_sz; i++) { 2945 queue_idx = apc->indir_table[i]; 2946 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2947 } 2948 } 2949 2950 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2951 if (err) 2952 return err; 2953 2954 mana_fence_rqs(apc); 2955 2956 return 0; 2957 } 2958 2959 int mana_query_gf_stats(struct mana_context *ac) 2960 { 2961 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2962 struct mana_query_gf_stat_resp resp = {}; 2963 struct mana_query_gf_stat_req req = {}; 2964 struct device *dev = gc->dev; 2965 int err; 2966 2967 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2968 sizeof(req), sizeof(resp)); 2969 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 2970 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE | 2971 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED | 2972 STATISTICS_FLAGS_HC_RX_BYTES | 2973 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS | 2974 STATISTICS_FLAGS_HC_RX_UCAST_BYTES | 2975 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS | 2976 STATISTICS_FLAGS_HC_RX_MCAST_BYTES | 2977 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS | 2978 STATISTICS_FLAGS_HC_RX_BCAST_BYTES | 2979 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED | 2980 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED | 2981 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS | 2982 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT | 2983 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT | 2984 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT | 2985 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT | 2986 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT | 2987 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION | 2988 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB | 2989 STATISTICS_FLAGS_HC_TX_BYTES | 2990 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2991 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2992 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2993 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2994 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2995 STATISTICS_FLAGS_HC_TX_BCAST_BYTES | 2996 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR; 2997 2998 err = mana_send_request(ac, &req, sizeof(req), &resp, 2999 sizeof(resp)); 3000 if (err) { 3001 dev_err(dev, "Failed to query GF stats: %d\n", err); 3002 return err; 3003 } 3004 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 3005 sizeof(resp)); 3006 if (err || resp.hdr.status) { 3007 dev_err(dev, "Failed to query GF stats: %d, 0x%x\n", err, 3008 resp.hdr.status); 3009 return err; 3010 } 3011 3012 ac->hc_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe; 3013 ac->hc_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled; 3014 ac->hc_stats.hc_rx_bytes = resp.hc_rx_bytes; 3015 ac->hc_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts; 3016 ac->hc_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes; 3017 ac->hc_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts; 3018 ac->hc_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes; 3019 ac->hc_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts; 3020 ac->hc_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes; 3021 ac->hc_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled; 3022 ac->hc_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled; 3023 ac->hc_stats.hc_tx_err_inval_vportoffset_pkt = 3024 resp.tx_err_inval_vport_offset_pkt; 3025 ac->hc_stats.hc_tx_err_vlan_enforcement = 3026 resp.tx_err_vlan_enforcement; 3027 ac->hc_stats.hc_tx_err_eth_type_enforcement = 3028 resp.tx_err_ethtype_enforcement; 3029 ac->hc_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement; 3030 ac->hc_stats.hc_tx_err_sqpdid_enforcement = 3031 resp.tx_err_SQPDID_enforcement; 3032 ac->hc_stats.hc_tx_err_cqpdid_enforcement = 3033 resp.tx_err_CQPDID_enforcement; 3034 ac->hc_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation; 3035 ac->hc_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob; 3036 ac->hc_stats.hc_tx_bytes = resp.hc_tx_bytes; 3037 ac->hc_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 3038 ac->hc_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 3039 ac->hc_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 3040 ac->hc_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 3041 ac->hc_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 3042 ac->hc_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 3043 ac->hc_stats.hc_tx_err_gdma = resp.tx_err_gdma; 3044 3045 return 0; 3046 } 3047 3048 void mana_query_phy_stats(struct mana_port_context *apc) 3049 { 3050 struct mana_query_phy_stat_resp resp = {}; 3051 struct mana_query_phy_stat_req req = {}; 3052 struct net_device *ndev = apc->ndev; 3053 int err; 3054 3055 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_PHY_STAT, 3056 sizeof(req), sizeof(resp)); 3057 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 3058 sizeof(resp)); 3059 if (err) 3060 return; 3061 3062 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_PHY_STAT, 3063 sizeof(resp)); 3064 if (err || resp.hdr.status) { 3065 netdev_err(ndev, 3066 "Failed to query PHY stats: %d, resp:0x%x\n", 3067 err, resp.hdr.status); 3068 return; 3069 } 3070 3071 /* Aggregate drop counters */ 3072 apc->phy_stats.rx_pkt_drop_phy = resp.rx_pkt_drop_phy; 3073 apc->phy_stats.tx_pkt_drop_phy = resp.tx_pkt_drop_phy; 3074 3075 /* Per TC traffic Counters */ 3076 apc->phy_stats.rx_pkt_tc0_phy = resp.rx_pkt_tc0_phy; 3077 apc->phy_stats.tx_pkt_tc0_phy = resp.tx_pkt_tc0_phy; 3078 apc->phy_stats.rx_pkt_tc1_phy = resp.rx_pkt_tc1_phy; 3079 apc->phy_stats.tx_pkt_tc1_phy = resp.tx_pkt_tc1_phy; 3080 apc->phy_stats.rx_pkt_tc2_phy = resp.rx_pkt_tc2_phy; 3081 apc->phy_stats.tx_pkt_tc2_phy = resp.tx_pkt_tc2_phy; 3082 apc->phy_stats.rx_pkt_tc3_phy = resp.rx_pkt_tc3_phy; 3083 apc->phy_stats.tx_pkt_tc3_phy = resp.tx_pkt_tc3_phy; 3084 apc->phy_stats.rx_pkt_tc4_phy = resp.rx_pkt_tc4_phy; 3085 apc->phy_stats.tx_pkt_tc4_phy = resp.tx_pkt_tc4_phy; 3086 apc->phy_stats.rx_pkt_tc5_phy = resp.rx_pkt_tc5_phy; 3087 apc->phy_stats.tx_pkt_tc5_phy = resp.tx_pkt_tc5_phy; 3088 apc->phy_stats.rx_pkt_tc6_phy = resp.rx_pkt_tc6_phy; 3089 apc->phy_stats.tx_pkt_tc6_phy = resp.tx_pkt_tc6_phy; 3090 apc->phy_stats.rx_pkt_tc7_phy = resp.rx_pkt_tc7_phy; 3091 apc->phy_stats.tx_pkt_tc7_phy = resp.tx_pkt_tc7_phy; 3092 3093 /* Per TC byte Counters */ 3094 apc->phy_stats.rx_byte_tc0_phy = resp.rx_byte_tc0_phy; 3095 apc->phy_stats.tx_byte_tc0_phy = resp.tx_byte_tc0_phy; 3096 apc->phy_stats.rx_byte_tc1_phy = resp.rx_byte_tc1_phy; 3097 apc->phy_stats.tx_byte_tc1_phy = resp.tx_byte_tc1_phy; 3098 apc->phy_stats.rx_byte_tc2_phy = resp.rx_byte_tc2_phy; 3099 apc->phy_stats.tx_byte_tc2_phy = resp.tx_byte_tc2_phy; 3100 apc->phy_stats.rx_byte_tc3_phy = resp.rx_byte_tc3_phy; 3101 apc->phy_stats.tx_byte_tc3_phy = resp.tx_byte_tc3_phy; 3102 apc->phy_stats.rx_byte_tc4_phy = resp.rx_byte_tc4_phy; 3103 apc->phy_stats.tx_byte_tc4_phy = resp.tx_byte_tc4_phy; 3104 apc->phy_stats.rx_byte_tc5_phy = resp.rx_byte_tc5_phy; 3105 apc->phy_stats.tx_byte_tc5_phy = resp.tx_byte_tc5_phy; 3106 apc->phy_stats.rx_byte_tc6_phy = resp.rx_byte_tc6_phy; 3107 apc->phy_stats.tx_byte_tc6_phy = resp.tx_byte_tc6_phy; 3108 apc->phy_stats.rx_byte_tc7_phy = resp.rx_byte_tc7_phy; 3109 apc->phy_stats.tx_byte_tc7_phy = resp.tx_byte_tc7_phy; 3110 3111 /* Per TC pause Counters */ 3112 apc->phy_stats.rx_pause_tc0_phy = resp.rx_pause_tc0_phy; 3113 apc->phy_stats.tx_pause_tc0_phy = resp.tx_pause_tc0_phy; 3114 apc->phy_stats.rx_pause_tc1_phy = resp.rx_pause_tc1_phy; 3115 apc->phy_stats.tx_pause_tc1_phy = resp.tx_pause_tc1_phy; 3116 apc->phy_stats.rx_pause_tc2_phy = resp.rx_pause_tc2_phy; 3117 apc->phy_stats.tx_pause_tc2_phy = resp.tx_pause_tc2_phy; 3118 apc->phy_stats.rx_pause_tc3_phy = resp.rx_pause_tc3_phy; 3119 apc->phy_stats.tx_pause_tc3_phy = resp.tx_pause_tc3_phy; 3120 apc->phy_stats.rx_pause_tc4_phy = resp.rx_pause_tc4_phy; 3121 apc->phy_stats.tx_pause_tc4_phy = resp.tx_pause_tc4_phy; 3122 apc->phy_stats.rx_pause_tc5_phy = resp.rx_pause_tc5_phy; 3123 apc->phy_stats.tx_pause_tc5_phy = resp.tx_pause_tc5_phy; 3124 apc->phy_stats.rx_pause_tc6_phy = resp.rx_pause_tc6_phy; 3125 apc->phy_stats.tx_pause_tc6_phy = resp.tx_pause_tc6_phy; 3126 apc->phy_stats.rx_pause_tc7_phy = resp.rx_pause_tc7_phy; 3127 apc->phy_stats.tx_pause_tc7_phy = resp.tx_pause_tc7_phy; 3128 } 3129 3130 static int mana_init_port(struct net_device *ndev) 3131 { 3132 struct mana_port_context *apc = netdev_priv(ndev); 3133 struct gdma_dev *gd = apc->ac->gdma_dev; 3134 u32 max_txq, max_rxq, max_queues; 3135 int port_idx = apc->port_idx; 3136 struct gdma_context *gc; 3137 char vport[32]; 3138 int err; 3139 3140 err = mana_init_port_context(apc); 3141 if (err) 3142 return err; 3143 3144 gc = gd->gdma_context; 3145 3146 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 3147 &apc->indir_table_sz); 3148 if (err) { 3149 netdev_err(ndev, "Failed to query info for vPort %d\n", 3150 port_idx); 3151 goto reset_apc; 3152 } 3153 3154 max_queues = min_t(u32, max_txq, max_rxq); 3155 if (apc->max_queues > max_queues) 3156 apc->max_queues = max_queues; 3157 3158 if (apc->num_queues > apc->max_queues) 3159 apc->num_queues = apc->max_queues; 3160 3161 eth_hw_addr_set(ndev, apc->mac_addr); 3162 sprintf(vport, "vport%d", port_idx); 3163 apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs); 3164 debugfs_create_u32("current_speed", 0400, apc->mana_port_debugfs, 3165 &apc->speed); 3166 return 0; 3167 3168 reset_apc: 3169 mana_cleanup_port_context(apc); 3170 return err; 3171 } 3172 3173 int mana_alloc_queues(struct net_device *ndev) 3174 { 3175 struct mana_port_context *apc = netdev_priv(ndev); 3176 struct gdma_dev *gd = apc->ac->gdma_dev; 3177 int err; 3178 3179 err = mana_create_vport(apc, ndev); 3180 if (err) { 3181 netdev_err(ndev, "Failed to create vPort %u : %d\n", apc->port_idx, err); 3182 return err; 3183 } 3184 3185 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 3186 if (err) { 3187 netdev_err(ndev, 3188 "netif_set_real_num_tx_queues () failed for ndev with num_queues %u : %d\n", 3189 apc->num_queues, err); 3190 goto destroy_vport; 3191 } 3192 3193 err = mana_add_rx_queues(apc, ndev); 3194 if (err) 3195 goto destroy_vport; 3196 3197 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 3198 3199 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 3200 if (err) { 3201 netdev_err(ndev, 3202 "netif_set_real_num_rx_queues () failed for ndev with num_queues %u : %d\n", 3203 apc->num_queues, err); 3204 goto destroy_vport; 3205 } 3206 3207 mana_rss_table_init(apc); 3208 3209 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 3210 if (err) { 3211 netdev_err(ndev, "Failed to configure RSS table: %d\n", err); 3212 goto destroy_vport; 3213 } 3214 3215 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) { 3216 err = mana_pf_register_filter(apc); 3217 if (err) 3218 goto destroy_vport; 3219 } 3220 3221 mana_chn_setxdp(apc, mana_xdp_get(apc)); 3222 3223 return 0; 3224 3225 destroy_vport: 3226 mana_destroy_vport(apc); 3227 return err; 3228 } 3229 3230 int mana_attach(struct net_device *ndev) 3231 { 3232 struct mana_port_context *apc = netdev_priv(ndev); 3233 int err; 3234 3235 ASSERT_RTNL(); 3236 3237 err = mana_init_port(ndev); 3238 if (err) 3239 return err; 3240 3241 if (apc->port_st_save) { 3242 err = mana_alloc_queues(ndev); 3243 if (err) { 3244 mana_cleanup_port_context(apc); 3245 return err; 3246 } 3247 } 3248 3249 apc->port_is_up = apc->port_st_save; 3250 3251 /* Ensure port state updated before txq state */ 3252 smp_wmb(); 3253 3254 netif_device_attach(ndev); 3255 3256 return 0; 3257 } 3258 3259 static int mana_dealloc_queues(struct net_device *ndev) 3260 { 3261 struct mana_port_context *apc = netdev_priv(ndev); 3262 unsigned long timeout = jiffies + 120 * HZ; 3263 struct gdma_dev *gd = apc->ac->gdma_dev; 3264 struct mana_txq *txq; 3265 struct sk_buff *skb; 3266 int i, err; 3267 u32 tsleep; 3268 3269 if (apc->port_is_up) 3270 return -EINVAL; 3271 3272 mana_chn_setxdp(apc, NULL); 3273 3274 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) 3275 mana_pf_deregister_filter(apc); 3276 3277 /* No packet can be transmitted now since apc->port_is_up is false. 3278 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 3279 * a txq because it may not timely see apc->port_is_up being cleared 3280 * to false, but it doesn't matter since mana_start_xmit() drops any 3281 * new packets due to apc->port_is_up being false. 3282 * 3283 * Drain all the in-flight TX packets. 3284 * A timeout of 120 seconds for all the queues is used. 3285 * This will break the while loop when h/w is not responding. 3286 * This value of 120 has been decided here considering max 3287 * number of queues. 3288 */ 3289 3290 for (i = 0; i < apc->num_queues; i++) { 3291 txq = &apc->tx_qp[i].txq; 3292 tsleep = 1000; 3293 while (atomic_read(&txq->pending_sends) > 0 && 3294 time_before(jiffies, timeout)) { 3295 usleep_range(tsleep, tsleep + 1000); 3296 tsleep <<= 1; 3297 } 3298 if (atomic_read(&txq->pending_sends)) { 3299 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 3300 if (err) { 3301 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 3302 err, atomic_read(&txq->pending_sends), 3303 txq->gdma_txq_id); 3304 } 3305 break; 3306 } 3307 } 3308 3309 for (i = 0; i < apc->num_queues; i++) { 3310 txq = &apc->tx_qp[i].txq; 3311 while ((skb = skb_dequeue(&txq->pending_skbs))) { 3312 mana_unmap_skb(skb, apc); 3313 dev_kfree_skb_any(skb); 3314 } 3315 atomic_set(&txq->pending_sends, 0); 3316 } 3317 /* We're 100% sure the queues can no longer be woken up, because 3318 * we're sure now mana_poll_tx_cq() can't be running. 3319 */ 3320 3321 apc->rss_state = TRI_STATE_FALSE; 3322 err = mana_disable_vport_rx(apc); 3323 if (err && mana_en_need_log(apc, err)) 3324 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 3325 3326 mana_fence_rqs(apc); 3327 3328 /* Even in err case, still need to cleanup the vPort */ 3329 mana_destroy_vport(apc); 3330 3331 return 0; 3332 } 3333 3334 int mana_detach(struct net_device *ndev, bool from_close) 3335 { 3336 struct mana_port_context *apc = netdev_priv(ndev); 3337 int err; 3338 3339 ASSERT_RTNL(); 3340 3341 apc->port_st_save = apc->port_is_up; 3342 apc->port_is_up = false; 3343 3344 /* Ensure port state updated before txq state */ 3345 smp_wmb(); 3346 3347 netif_tx_disable(ndev); 3348 3349 if (apc->port_st_save) { 3350 err = mana_dealloc_queues(ndev); 3351 if (err) { 3352 netdev_err(ndev, "%s failed to deallocate queues: %d\n", __func__, err); 3353 return err; 3354 } 3355 } 3356 3357 if (!from_close) { 3358 netif_device_detach(ndev); 3359 mana_cleanup_port_context(apc); 3360 } 3361 3362 return 0; 3363 } 3364 3365 static int mana_probe_port(struct mana_context *ac, int port_idx, 3366 struct net_device **ndev_storage) 3367 { 3368 struct gdma_context *gc = ac->gdma_dev->gdma_context; 3369 struct mana_port_context *apc; 3370 struct net_device *ndev; 3371 int err; 3372 3373 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 3374 gc->max_num_queues); 3375 if (!ndev) 3376 return -ENOMEM; 3377 3378 *ndev_storage = ndev; 3379 3380 apc = netdev_priv(ndev); 3381 apc->ac = ac; 3382 apc->ndev = ndev; 3383 apc->max_queues = gc->max_num_queues; 3384 /* Use MANA_DEF_NUM_QUEUES as default, still honoring the HW limit */ 3385 apc->num_queues = min(gc->max_num_queues, MANA_DEF_NUM_QUEUES); 3386 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE; 3387 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE; 3388 apc->port_handle = INVALID_MANA_HANDLE; 3389 apc->pf_filter_handle = INVALID_MANA_HANDLE; 3390 apc->port_idx = port_idx; 3391 apc->cqe_coalescing_enable = 0; 3392 3393 mutex_init(&apc->vport_mutex); 3394 apc->vport_use_count = 0; 3395 3396 ndev->netdev_ops = &mana_devops; 3397 ndev->ethtool_ops = &mana_ethtool_ops; 3398 ndev->mtu = ETH_DATA_LEN; 3399 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 3400 ndev->min_mtu = ETH_MIN_MTU; 3401 ndev->needed_headroom = MANA_HEADROOM; 3402 ndev->dev_port = port_idx; 3403 /* Recommended timeout based on HW FPGA re-config scenario. */ 3404 ndev->watchdog_timeo = 15 * HZ; 3405 SET_NETDEV_DEV(ndev, gc->dev); 3406 3407 netif_set_tso_max_size(ndev, GSO_MAX_SIZE); 3408 3409 netif_carrier_off(ndev); 3410 3411 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 3412 3413 err = mana_init_port(ndev); 3414 if (err) 3415 goto free_net; 3416 3417 err = mana_rss_table_alloc(apc); 3418 if (err) 3419 goto reset_apc; 3420 3421 /* Initialize the per port queue reset work.*/ 3422 INIT_WORK(&apc->queue_reset_work, 3423 mana_per_port_queue_reset_work_handler); 3424 3425 netdev_lockdep_set_classes(ndev); 3426 3427 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 3428 ndev->hw_features |= NETIF_F_RXCSUM; 3429 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 3430 ndev->hw_features |= NETIF_F_RXHASH; 3431 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 3432 NETIF_F_HW_VLAN_CTAG_RX; 3433 ndev->vlan_features = ndev->features; 3434 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 3435 NETDEV_XDP_ACT_REDIRECT | 3436 NETDEV_XDP_ACT_NDO_XMIT); 3437 3438 err = register_netdev(ndev); 3439 if (err) { 3440 netdev_err(ndev, "Unable to register netdev.\n"); 3441 goto free_indir; 3442 } 3443 3444 netif_carrier_on(ndev); 3445 3446 return 0; 3447 3448 free_indir: 3449 mana_cleanup_indir_table(apc); 3450 reset_apc: 3451 mana_cleanup_port_context(apc); 3452 free_net: 3453 *ndev_storage = NULL; 3454 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 3455 free_netdev(ndev); 3456 return err; 3457 } 3458 3459 static void adev_release(struct device *dev) 3460 { 3461 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 3462 3463 kfree(madev); 3464 } 3465 3466 static void remove_adev(struct gdma_dev *gd) 3467 { 3468 struct auxiliary_device *adev = gd->adev; 3469 int id = adev->id; 3470 3471 auxiliary_device_delete(adev); 3472 auxiliary_device_uninit(adev); 3473 3474 mana_adev_idx_free(id); 3475 gd->adev = NULL; 3476 } 3477 3478 static int add_adev(struct gdma_dev *gd, const char *name) 3479 { 3480 struct auxiliary_device *adev; 3481 struct mana_adev *madev; 3482 int ret; 3483 int id; 3484 3485 madev = kzalloc_obj(*madev); 3486 if (!madev) 3487 return -ENOMEM; 3488 3489 adev = &madev->adev; 3490 ret = mana_adev_idx_alloc(); 3491 if (ret < 0) 3492 goto idx_fail; 3493 id = ret; 3494 adev->id = id; 3495 3496 adev->name = name; 3497 adev->dev.parent = gd->gdma_context->dev; 3498 adev->dev.release = adev_release; 3499 madev->mdev = gd; 3500 3501 ret = auxiliary_device_init(adev); 3502 if (ret) 3503 goto init_fail; 3504 3505 /* madev is owned by the auxiliary device */ 3506 madev = NULL; 3507 ret = auxiliary_device_add(adev); 3508 if (ret) 3509 goto add_fail; 3510 3511 gd->adev = adev; 3512 dev_dbg(gd->gdma_context->dev, 3513 "Auxiliary device added successfully\n"); 3514 return 0; 3515 3516 add_fail: 3517 auxiliary_device_uninit(adev); 3518 3519 init_fail: 3520 mana_adev_idx_free(id); 3521 3522 idx_fail: 3523 kfree(madev); 3524 3525 return ret; 3526 } 3527 3528 static void mana_rdma_service_handle(struct work_struct *work) 3529 { 3530 struct mana_service_work *serv_work = 3531 container_of(work, struct mana_service_work, work); 3532 struct gdma_dev *gd = serv_work->gdma_dev; 3533 struct device *dev = gd->gdma_context->dev; 3534 int ret; 3535 3536 if (READ_ONCE(gd->rdma_teardown)) 3537 goto out; 3538 3539 switch (serv_work->event) { 3540 case GDMA_SERVICE_TYPE_RDMA_SUSPEND: 3541 if (!gd->adev || gd->is_suspended) 3542 break; 3543 3544 remove_adev(gd); 3545 gd->is_suspended = true; 3546 break; 3547 3548 case GDMA_SERVICE_TYPE_RDMA_RESUME: 3549 if (!gd->is_suspended) 3550 break; 3551 3552 ret = add_adev(gd, "rdma"); 3553 if (ret) 3554 dev_err(dev, "Failed to add adev on resume: %d\n", ret); 3555 else 3556 gd->is_suspended = false; 3557 break; 3558 3559 default: 3560 dev_warn(dev, "unknown adev service event %u\n", 3561 serv_work->event); 3562 break; 3563 } 3564 3565 out: 3566 kfree(serv_work); 3567 } 3568 3569 int mana_rdma_service_event(struct gdma_context *gc, enum gdma_service_type event) 3570 { 3571 struct gdma_dev *gd = &gc->mana_ib; 3572 struct mana_service_work *serv_work; 3573 3574 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3575 /* RDMA device is not detected on pci */ 3576 return 0; 3577 } 3578 3579 serv_work = kzalloc_obj(*serv_work, GFP_ATOMIC); 3580 if (!serv_work) 3581 return -ENOMEM; 3582 3583 serv_work->event = event; 3584 serv_work->gdma_dev = gd; 3585 3586 INIT_WORK(&serv_work->work, mana_rdma_service_handle); 3587 queue_work(gc->service_wq, &serv_work->work); 3588 3589 return 0; 3590 } 3591 3592 #define MANA_GF_STATS_PERIOD (2 * HZ) 3593 3594 static void mana_gf_stats_work_handler(struct work_struct *work) 3595 { 3596 struct mana_context *ac = 3597 container_of(to_delayed_work(work), struct mana_context, gf_stats_work); 3598 struct gdma_context *gc = ac->gdma_dev->gdma_context; 3599 int err; 3600 3601 err = mana_query_gf_stats(ac); 3602 if (err == -ETIMEDOUT) { 3603 /* HWC timeout detected - reset stats and stop rescheduling */ 3604 ac->hwc_timeout_occurred = true; 3605 memset(&ac->hc_stats, 0, sizeof(ac->hc_stats)); 3606 dev_warn(gc->dev, 3607 "Gf stats wk handler: gf stats query timed out.\n"); 3608 /* As HWC timed out, indicating a faulty HW state and needs a 3609 * reset. 3610 */ 3611 mana_schedule_serv_work(gc, GDMA_EQE_HWC_RESET_REQUEST); 3612 return; 3613 } 3614 schedule_delayed_work(&ac->gf_stats_work, MANA_GF_STATS_PERIOD); 3615 } 3616 3617 int mana_probe(struct gdma_dev *gd, bool resuming) 3618 { 3619 struct gdma_context *gc = gd->gdma_context; 3620 struct mana_context *ac = gd->driver_data; 3621 struct mana_port_context *apc = NULL; 3622 struct device *dev = gc->dev; 3623 u8 bm_hostmode = 0; 3624 u16 num_ports = 0; 3625 int err; 3626 int i; 3627 3628 dev_info(dev, 3629 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 3630 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 3631 3632 err = mana_gd_register_device(gd); 3633 if (err) 3634 return err; 3635 3636 if (!resuming) { 3637 ac = kzalloc_obj(*ac); 3638 if (!ac) 3639 return -ENOMEM; 3640 3641 ac->gdma_dev = gd; 3642 gd->driver_data = ac; 3643 } 3644 3645 err = mana_create_eq(ac); 3646 if (err) { 3647 dev_err(dev, "Failed to create EQs: %d\n", err); 3648 goto out; 3649 } 3650 3651 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 3652 MANA_MICRO_VERSION, &num_ports, &bm_hostmode); 3653 if (err) 3654 goto out; 3655 3656 ac->bm_hostmode = bm_hostmode; 3657 3658 if (!resuming) { 3659 ac->num_ports = num_ports; 3660 3661 INIT_WORK(&ac->link_change_work, mana_link_state_handle); 3662 } else { 3663 if (ac->num_ports != num_ports) { 3664 dev_err(dev, "The number of vPorts changed: %d->%d\n", 3665 ac->num_ports, num_ports); 3666 err = -EPROTO; 3667 goto out; 3668 } 3669 3670 enable_work(&ac->link_change_work); 3671 } 3672 3673 if (ac->num_ports == 0) 3674 dev_err(dev, "Failed to detect any vPort\n"); 3675 3676 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 3677 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 3678 3679 ac->per_port_queue_reset_wq = 3680 create_singlethread_workqueue("mana_per_port_queue_reset_wq"); 3681 if (!ac->per_port_queue_reset_wq) { 3682 dev_err(dev, "Failed to allocate per port queue reset workqueue\n"); 3683 err = -ENOMEM; 3684 goto out; 3685 } 3686 3687 if (!resuming) { 3688 for (i = 0; i < ac->num_ports; i++) { 3689 err = mana_probe_port(ac, i, &ac->ports[i]); 3690 /* we log the port for which the probe failed and stop 3691 * probes for subsequent ports. 3692 * Note that we keep running ports, for which the probes 3693 * were successful, unless add_adev fails too 3694 */ 3695 if (err) { 3696 dev_err(dev, "Probe Failed for port %d\n", i); 3697 break; 3698 } 3699 } 3700 } else { 3701 for (i = 0; i < ac->num_ports; i++) { 3702 rtnl_lock(); 3703 apc = netdev_priv(ac->ports[i]); 3704 enable_work(&apc->queue_reset_work); 3705 err = mana_attach(ac->ports[i]); 3706 rtnl_unlock(); 3707 /* we log the port for which the attach failed and stop 3708 * attach for subsequent ports 3709 * Note that we keep running ports, for which the attach 3710 * were successful, unless add_adev fails too 3711 */ 3712 if (err) { 3713 dev_err(dev, "Attach Failed for port %d\n", i); 3714 break; 3715 } 3716 } 3717 } 3718 3719 err = add_adev(gd, "eth"); 3720 3721 INIT_DELAYED_WORK(&ac->gf_stats_work, mana_gf_stats_work_handler); 3722 schedule_delayed_work(&ac->gf_stats_work, MANA_GF_STATS_PERIOD); 3723 3724 out: 3725 if (err) { 3726 mana_remove(gd, false); 3727 } else { 3728 dev_dbg(dev, "gd=%p, id=%u, num_ports=%d, type=%u, instance=%u\n", 3729 gd, gd->dev_id.as_uint32, ac->num_ports, 3730 gd->dev_id.type, gd->dev_id.instance); 3731 dev_dbg(dev, "%s succeeded\n", __func__); 3732 } 3733 3734 return err; 3735 } 3736 3737 void mana_remove(struct gdma_dev *gd, bool suspending) 3738 { 3739 struct gdma_context *gc = gd->gdma_context; 3740 struct mana_context *ac = gd->driver_data; 3741 struct mana_port_context *apc; 3742 struct device *dev = gc->dev; 3743 struct net_device *ndev; 3744 int err; 3745 int i; 3746 3747 disable_work_sync(&ac->link_change_work); 3748 cancel_delayed_work_sync(&ac->gf_stats_work); 3749 3750 /* adev currently doesn't support suspending, always remove it */ 3751 if (gd->adev) 3752 remove_adev(gd); 3753 3754 for (i = 0; i < ac->num_ports; i++) { 3755 ndev = ac->ports[i]; 3756 if (!ndev) { 3757 if (i == 0) 3758 dev_err(dev, "No net device to remove\n"); 3759 goto out; 3760 } 3761 3762 apc = netdev_priv(ndev); 3763 disable_work_sync(&apc->queue_reset_work); 3764 3765 /* All cleanup actions should stay after rtnl_lock(), otherwise 3766 * other functions may access partially cleaned up data. 3767 */ 3768 rtnl_lock(); 3769 3770 err = mana_detach(ndev, false); 3771 if (err) 3772 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 3773 i, err); 3774 3775 if (suspending) { 3776 /* No need to unregister the ndev. */ 3777 rtnl_unlock(); 3778 continue; 3779 } 3780 3781 unregister_netdevice(ndev); 3782 mana_cleanup_indir_table(apc); 3783 3784 rtnl_unlock(); 3785 3786 free_netdev(ndev); 3787 } 3788 3789 mana_destroy_eq(ac); 3790 out: 3791 if (ac->per_port_queue_reset_wq) { 3792 destroy_workqueue(ac->per_port_queue_reset_wq); 3793 ac->per_port_queue_reset_wq = NULL; 3794 } 3795 3796 mana_gd_deregister_device(gd); 3797 3798 if (suspending) 3799 return; 3800 3801 gd->driver_data = NULL; 3802 gd->gdma_context = NULL; 3803 kfree(ac); 3804 dev_dbg(dev, "%s succeeded\n", __func__); 3805 } 3806 3807 int mana_rdma_probe(struct gdma_dev *gd) 3808 { 3809 int err = 0; 3810 3811 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3812 /* RDMA device is not detected on pci */ 3813 return err; 3814 } 3815 3816 err = mana_gd_register_device(gd); 3817 if (err) 3818 return err; 3819 3820 err = add_adev(gd, "rdma"); 3821 if (err) 3822 mana_gd_deregister_device(gd); 3823 3824 return err; 3825 } 3826 3827 void mana_rdma_remove(struct gdma_dev *gd) 3828 { 3829 struct gdma_context *gc = gd->gdma_context; 3830 3831 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3832 /* RDMA device is not detected on pci */ 3833 return; 3834 } 3835 3836 WRITE_ONCE(gd->rdma_teardown, true); 3837 3838 if (gc->service_wq) 3839 flush_workqueue(gc->service_wq); 3840 3841 if (gd->adev) 3842 remove_adev(gd); 3843 3844 mana_gd_deregister_device(gd); 3845 } 3846 3847 struct net_device *mana_get_primary_netdev(struct mana_context *ac, 3848 u32 port_index, 3849 netdevice_tracker *tracker) 3850 { 3851 struct net_device *ndev; 3852 3853 if (port_index >= ac->num_ports) 3854 return NULL; 3855 3856 rcu_read_lock(); 3857 3858 /* If mana is used in netvsc, the upper netdevice should be returned. */ 3859 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]); 3860 3861 /* If there is no upper device, use the parent Ethernet device */ 3862 if (!ndev) 3863 ndev = ac->ports[port_index]; 3864 3865 netdev_hold(ndev, tracker, GFP_ATOMIC); 3866 rcu_read_unlock(); 3867 3868 return ndev; 3869 } 3870 EXPORT_SYMBOL_NS(mana_get_primary_netdev, "NET_MANA"); 3871