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 15 #include <net/checksum.h> 16 #include <net/ip6_checksum.h> 17 #include <net/netdev_lock.h> 18 #include <net/page_pool/helpers.h> 19 #include <net/xdp.h> 20 21 #include <net/mana/mana.h> 22 #include <net/mana/mana_auxiliary.h> 23 24 static DEFINE_IDA(mana_adev_ida); 25 26 static int mana_adev_idx_alloc(void) 27 { 28 return ida_alloc(&mana_adev_ida, GFP_KERNEL); 29 } 30 31 static void mana_adev_idx_free(int idx) 32 { 33 ida_free(&mana_adev_ida, idx); 34 } 35 36 static ssize_t mana_dbg_q_read(struct file *filp, char __user *buf, size_t count, 37 loff_t *pos) 38 { 39 struct gdma_queue *gdma_q = filp->private_data; 40 41 return simple_read_from_buffer(buf, count, pos, gdma_q->queue_mem_ptr, 42 gdma_q->queue_size); 43 } 44 45 static const struct file_operations mana_dbg_q_fops = { 46 .owner = THIS_MODULE, 47 .open = simple_open, 48 .read = mana_dbg_q_read, 49 }; 50 51 /* Microsoft Azure Network Adapter (MANA) functions */ 52 53 static int mana_open(struct net_device *ndev) 54 { 55 struct mana_port_context *apc = netdev_priv(ndev); 56 int err; 57 err = mana_alloc_queues(ndev); 58 59 if (err) { 60 netdev_err(ndev, "%s failed to allocate queues: %d\n", __func__, err); 61 return err; 62 } 63 64 apc->port_is_up = true; 65 66 /* Ensure port state updated before txq state */ 67 smp_wmb(); 68 69 netif_carrier_on(ndev); 70 netif_tx_wake_all_queues(ndev); 71 netdev_dbg(ndev, "%s successful\n", __func__); 72 return 0; 73 } 74 75 static int mana_close(struct net_device *ndev) 76 { 77 struct mana_port_context *apc = netdev_priv(ndev); 78 79 if (!apc->port_is_up) 80 return 0; 81 82 return mana_detach(ndev, true); 83 } 84 85 static bool mana_can_tx(struct gdma_queue *wq) 86 { 87 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE; 88 } 89 90 static unsigned int mana_checksum_info(struct sk_buff *skb) 91 { 92 if (skb->protocol == htons(ETH_P_IP)) { 93 struct iphdr *ip = ip_hdr(skb); 94 95 if (ip->protocol == IPPROTO_TCP) 96 return IPPROTO_TCP; 97 98 if (ip->protocol == IPPROTO_UDP) 99 return IPPROTO_UDP; 100 } else if (skb->protocol == htons(ETH_P_IPV6)) { 101 struct ipv6hdr *ip6 = ipv6_hdr(skb); 102 103 if (ip6->nexthdr == IPPROTO_TCP) 104 return IPPROTO_TCP; 105 106 if (ip6->nexthdr == IPPROTO_UDP) 107 return IPPROTO_UDP; 108 } 109 110 /* No csum offloading */ 111 return 0; 112 } 113 114 static void mana_add_sge(struct mana_tx_package *tp, struct mana_skb_head *ash, 115 int sg_i, dma_addr_t da, int sge_len, u32 gpa_mkey) 116 { 117 ash->dma_handle[sg_i] = da; 118 ash->size[sg_i] = sge_len; 119 120 tp->wqe_req.sgl[sg_i].address = da; 121 tp->wqe_req.sgl[sg_i].mem_key = gpa_mkey; 122 tp->wqe_req.sgl[sg_i].size = sge_len; 123 } 124 125 static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc, 126 struct mana_tx_package *tp, int gso_hs) 127 { 128 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 129 int hsg = 1; /* num of SGEs of linear part */ 130 struct gdma_dev *gd = apc->ac->gdma_dev; 131 int skb_hlen = skb_headlen(skb); 132 int sge0_len, sge1_len = 0; 133 struct gdma_context *gc; 134 struct device *dev; 135 skb_frag_t *frag; 136 dma_addr_t da; 137 int sg_i; 138 int i; 139 140 gc = gd->gdma_context; 141 dev = gc->dev; 142 143 if (gso_hs && gso_hs < skb_hlen) { 144 sge0_len = gso_hs; 145 sge1_len = skb_hlen - gso_hs; 146 } else { 147 sge0_len = skb_hlen; 148 } 149 150 da = dma_map_single(dev, skb->data, sge0_len, DMA_TO_DEVICE); 151 if (dma_mapping_error(dev, da)) 152 return -ENOMEM; 153 154 mana_add_sge(tp, ash, 0, da, sge0_len, gd->gpa_mkey); 155 156 if (sge1_len) { 157 sg_i = 1; 158 da = dma_map_single(dev, skb->data + sge0_len, sge1_len, 159 DMA_TO_DEVICE); 160 if (dma_mapping_error(dev, da)) 161 goto frag_err; 162 163 mana_add_sge(tp, ash, sg_i, da, sge1_len, gd->gpa_mkey); 164 hsg = 2; 165 } 166 167 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 168 sg_i = hsg + i; 169 170 frag = &skb_shinfo(skb)->frags[i]; 171 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 172 DMA_TO_DEVICE); 173 if (dma_mapping_error(dev, da)) 174 goto frag_err; 175 176 mana_add_sge(tp, ash, sg_i, da, skb_frag_size(frag), 177 gd->gpa_mkey); 178 } 179 180 return 0; 181 182 frag_err: 183 if (net_ratelimit()) 184 netdev_err(apc->ndev, "Failed to map skb of size %u to DMA\n", 185 skb->len); 186 for (i = sg_i - 1; i >= hsg; i--) 187 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 188 DMA_TO_DEVICE); 189 190 for (i = hsg - 1; i >= 0; i--) 191 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 192 DMA_TO_DEVICE); 193 194 return -ENOMEM; 195 } 196 197 /* Handle the case when GSO SKB linear length is too large. 198 * MANA NIC requires GSO packets to put only the packet header to SGE0. 199 * So, we need 2 SGEs for the skb linear part which contains more than the 200 * header. 201 * Return a positive value for the number of SGEs, or a negative value 202 * for an error. 203 */ 204 static int mana_fix_skb_head(struct net_device *ndev, struct sk_buff *skb, 205 int gso_hs) 206 { 207 int num_sge = 1 + skb_shinfo(skb)->nr_frags; 208 int skb_hlen = skb_headlen(skb); 209 210 if (gso_hs < skb_hlen) { 211 num_sge++; 212 } else if (gso_hs > skb_hlen) { 213 if (net_ratelimit()) 214 netdev_err(ndev, 215 "TX nonlinear head: hs:%d, skb_hlen:%d\n", 216 gso_hs, skb_hlen); 217 218 return -EINVAL; 219 } 220 221 return num_sge; 222 } 223 224 /* Get the GSO packet's header size */ 225 static int mana_get_gso_hs(struct sk_buff *skb) 226 { 227 int gso_hs; 228 229 if (skb->encapsulation) { 230 gso_hs = skb_inner_tcp_all_headers(skb); 231 } else { 232 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 233 gso_hs = skb_transport_offset(skb) + 234 sizeof(struct udphdr); 235 } else { 236 gso_hs = skb_tcp_all_headers(skb); 237 } 238 } 239 240 return gso_hs; 241 } 242 243 netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) 244 { 245 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT; 246 struct mana_port_context *apc = netdev_priv(ndev); 247 int gso_hs = 0; /* zero for non-GSO pkts */ 248 u16 txq_idx = skb_get_queue_mapping(skb); 249 struct gdma_dev *gd = apc->ac->gdma_dev; 250 bool ipv4 = false, ipv6 = false; 251 struct mana_tx_package pkg = {}; 252 struct netdev_queue *net_txq; 253 struct mana_stats_tx *tx_stats; 254 struct gdma_queue *gdma_sq; 255 unsigned int csum_type; 256 struct mana_txq *txq; 257 struct mana_cq *cq; 258 int err, len; 259 260 if (unlikely(!apc->port_is_up)) 261 goto tx_drop; 262 263 if (skb_cow_head(skb, MANA_HEADROOM)) 264 goto tx_drop_count; 265 266 if (unlikely(ipv6_hopopt_jumbo_remove(skb))) 267 goto tx_drop_count; 268 269 txq = &apc->tx_qp[txq_idx].txq; 270 gdma_sq = txq->gdma_sq; 271 cq = &apc->tx_qp[txq_idx].tx_cq; 272 tx_stats = &txq->stats; 273 274 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id; 275 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame; 276 277 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) { 278 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset; 279 pkt_fmt = MANA_LONG_PKT_FMT; 280 } else { 281 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; 282 } 283 284 if (skb_vlan_tag_present(skb)) { 285 pkt_fmt = MANA_LONG_PKT_FMT; 286 pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1; 287 pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb); 288 pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb); 289 pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb); 290 } 291 292 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt; 293 294 if (pkt_fmt == MANA_SHORT_PKT_FMT) { 295 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob); 296 u64_stats_update_begin(&tx_stats->syncp); 297 tx_stats->short_pkt_fmt++; 298 u64_stats_update_end(&tx_stats->syncp); 299 } else { 300 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob); 301 u64_stats_update_begin(&tx_stats->syncp); 302 tx_stats->long_pkt_fmt++; 303 u64_stats_update_end(&tx_stats->syncp); 304 } 305 306 pkg.wqe_req.inline_oob_data = &pkg.tx_oob; 307 pkg.wqe_req.flags = 0; 308 pkg.wqe_req.client_data_unit = 0; 309 310 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; 311 312 if (skb->protocol == htons(ETH_P_IP)) 313 ipv4 = true; 314 else if (skb->protocol == htons(ETH_P_IPV6)) 315 ipv6 = true; 316 317 if (skb_is_gso(skb)) { 318 int num_sge; 319 320 gso_hs = mana_get_gso_hs(skb); 321 322 num_sge = mana_fix_skb_head(ndev, skb, gso_hs); 323 if (num_sge > 0) 324 pkg.wqe_req.num_sge = num_sge; 325 else 326 goto tx_drop_count; 327 328 u64_stats_update_begin(&tx_stats->syncp); 329 if (skb->encapsulation) { 330 tx_stats->tso_inner_packets++; 331 tx_stats->tso_inner_bytes += skb->len - gso_hs; 332 } else { 333 tx_stats->tso_packets++; 334 tx_stats->tso_bytes += skb->len - gso_hs; 335 } 336 u64_stats_update_end(&tx_stats->syncp); 337 338 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 339 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 340 341 pkg.tx_oob.s_oob.comp_iphdr_csum = 1; 342 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 343 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 344 345 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size; 346 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0; 347 if (ipv4) { 348 ip_hdr(skb)->tot_len = 0; 349 ip_hdr(skb)->check = 0; 350 tcp_hdr(skb)->check = 351 ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 352 ip_hdr(skb)->daddr, 0, 353 IPPROTO_TCP, 0); 354 } else { 355 ipv6_hdr(skb)->payload_len = 0; 356 tcp_hdr(skb)->check = 357 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 358 &ipv6_hdr(skb)->daddr, 0, 359 IPPROTO_TCP, 0); 360 } 361 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 362 csum_type = mana_checksum_info(skb); 363 364 u64_stats_update_begin(&tx_stats->syncp); 365 tx_stats->csum_partial++; 366 u64_stats_update_end(&tx_stats->syncp); 367 368 if (csum_type == IPPROTO_TCP) { 369 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 370 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 371 372 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 373 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 374 375 } else if (csum_type == IPPROTO_UDP) { 376 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 377 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 378 379 pkg.tx_oob.s_oob.comp_udp_csum = 1; 380 } else { 381 /* Can't do offload of this type of checksum */ 382 if (skb_checksum_help(skb)) 383 goto tx_drop_count; 384 } 385 } 386 387 WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES); 388 389 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { 390 pkg.wqe_req.sgl = pkg.sgl_array; 391 } else { 392 pkg.sgl_ptr = kmalloc_array(pkg.wqe_req.num_sge, 393 sizeof(struct gdma_sge), 394 GFP_ATOMIC); 395 if (!pkg.sgl_ptr) 396 goto tx_drop_count; 397 398 pkg.wqe_req.sgl = pkg.sgl_ptr; 399 } 400 401 if (mana_map_skb(skb, apc, &pkg, gso_hs)) { 402 u64_stats_update_begin(&tx_stats->syncp); 403 tx_stats->mana_map_err++; 404 u64_stats_update_end(&tx_stats->syncp); 405 goto free_sgl_ptr; 406 } 407 408 skb_queue_tail(&txq->pending_skbs, skb); 409 410 len = skb->len; 411 net_txq = netdev_get_tx_queue(ndev, txq_idx); 412 413 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req, 414 (struct gdma_posted_wqe_info *)skb->cb); 415 if (!mana_can_tx(gdma_sq)) { 416 netif_tx_stop_queue(net_txq); 417 apc->eth_stats.stop_queue++; 418 } 419 420 if (err) { 421 (void)skb_dequeue_tail(&txq->pending_skbs); 422 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err); 423 err = NETDEV_TX_BUSY; 424 goto tx_busy; 425 } 426 427 err = NETDEV_TX_OK; 428 atomic_inc(&txq->pending_sends); 429 430 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq); 431 432 /* skb may be freed after mana_gd_post_work_request. Do not use it. */ 433 skb = NULL; 434 435 tx_stats = &txq->stats; 436 u64_stats_update_begin(&tx_stats->syncp); 437 tx_stats->packets++; 438 tx_stats->bytes += len; 439 u64_stats_update_end(&tx_stats->syncp); 440 441 tx_busy: 442 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) { 443 netif_tx_wake_queue(net_txq); 444 apc->eth_stats.wake_queue++; 445 } 446 447 kfree(pkg.sgl_ptr); 448 return err; 449 450 free_sgl_ptr: 451 kfree(pkg.sgl_ptr); 452 tx_drop_count: 453 ndev->stats.tx_dropped++; 454 tx_drop: 455 dev_kfree_skb_any(skb); 456 return NETDEV_TX_OK; 457 } 458 459 static void mana_get_stats64(struct net_device *ndev, 460 struct rtnl_link_stats64 *st) 461 { 462 struct mana_port_context *apc = netdev_priv(ndev); 463 unsigned int num_queues = apc->num_queues; 464 struct mana_stats_rx *rx_stats; 465 struct mana_stats_tx *tx_stats; 466 unsigned int start; 467 u64 packets, bytes; 468 int q; 469 470 if (!apc->port_is_up) 471 return; 472 473 netdev_stats_to_stats64(st, &ndev->stats); 474 475 for (q = 0; q < num_queues; q++) { 476 rx_stats = &apc->rxqs[q]->stats; 477 478 do { 479 start = u64_stats_fetch_begin(&rx_stats->syncp); 480 packets = rx_stats->packets; 481 bytes = rx_stats->bytes; 482 } while (u64_stats_fetch_retry(&rx_stats->syncp, start)); 483 484 st->rx_packets += packets; 485 st->rx_bytes += bytes; 486 } 487 488 for (q = 0; q < num_queues; q++) { 489 tx_stats = &apc->tx_qp[q].txq.stats; 490 491 do { 492 start = u64_stats_fetch_begin(&tx_stats->syncp); 493 packets = tx_stats->packets; 494 bytes = tx_stats->bytes; 495 } while (u64_stats_fetch_retry(&tx_stats->syncp, start)); 496 497 st->tx_packets += packets; 498 st->tx_bytes += bytes; 499 } 500 } 501 502 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb, 503 int old_q) 504 { 505 struct mana_port_context *apc = netdev_priv(ndev); 506 u32 hash = skb_get_hash(skb); 507 struct sock *sk = skb->sk; 508 int txq; 509 510 txq = apc->indir_table[hash & (apc->indir_table_sz - 1)]; 511 512 if (txq != old_q && sk && sk_fullsock(sk) && 513 rcu_access_pointer(sk->sk_dst_cache)) 514 sk_tx_queue_set(sk, txq); 515 516 return txq; 517 } 518 519 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb, 520 struct net_device *sb_dev) 521 { 522 int txq; 523 524 if (ndev->real_num_tx_queues == 1) 525 return 0; 526 527 txq = sk_tx_queue_get(skb->sk); 528 529 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) { 530 if (skb_rx_queue_recorded(skb)) 531 txq = skb_get_rx_queue(skb); 532 else 533 txq = mana_get_tx_queue(ndev, skb, txq); 534 } 535 536 return txq; 537 } 538 539 /* Release pre-allocated RX buffers */ 540 void mana_pre_dealloc_rxbufs(struct mana_port_context *mpc) 541 { 542 struct device *dev; 543 int i; 544 545 dev = mpc->ac->gdma_dev->gdma_context->dev; 546 547 if (!mpc->rxbufs_pre) 548 goto out1; 549 550 if (!mpc->das_pre) 551 goto out2; 552 553 while (mpc->rxbpre_total) { 554 i = --mpc->rxbpre_total; 555 dma_unmap_single(dev, mpc->das_pre[i], mpc->rxbpre_datasize, 556 DMA_FROM_DEVICE); 557 put_page(virt_to_head_page(mpc->rxbufs_pre[i])); 558 } 559 560 kfree(mpc->das_pre); 561 mpc->das_pre = NULL; 562 563 out2: 564 kfree(mpc->rxbufs_pre); 565 mpc->rxbufs_pre = NULL; 566 567 out1: 568 mpc->rxbpre_datasize = 0; 569 mpc->rxbpre_alloc_size = 0; 570 mpc->rxbpre_headroom = 0; 571 } 572 573 /* Get a buffer from the pre-allocated RX buffers */ 574 static void *mana_get_rxbuf_pre(struct mana_rxq *rxq, dma_addr_t *da) 575 { 576 struct net_device *ndev = rxq->ndev; 577 struct mana_port_context *mpc; 578 void *va; 579 580 mpc = netdev_priv(ndev); 581 582 if (!mpc->rxbufs_pre || !mpc->das_pre || !mpc->rxbpre_total) { 583 netdev_err(ndev, "No RX pre-allocated bufs\n"); 584 return NULL; 585 } 586 587 /* Check sizes to catch unexpected coding error */ 588 if (mpc->rxbpre_datasize != rxq->datasize) { 589 netdev_err(ndev, "rxbpre_datasize mismatch: %u: %u\n", 590 mpc->rxbpre_datasize, rxq->datasize); 591 return NULL; 592 } 593 594 if (mpc->rxbpre_alloc_size != rxq->alloc_size) { 595 netdev_err(ndev, "rxbpre_alloc_size mismatch: %u: %u\n", 596 mpc->rxbpre_alloc_size, rxq->alloc_size); 597 return NULL; 598 } 599 600 if (mpc->rxbpre_headroom != rxq->headroom) { 601 netdev_err(ndev, "rxbpre_headroom mismatch: %u: %u\n", 602 mpc->rxbpre_headroom, rxq->headroom); 603 return NULL; 604 } 605 606 mpc->rxbpre_total--; 607 608 *da = mpc->das_pre[mpc->rxbpre_total]; 609 va = mpc->rxbufs_pre[mpc->rxbpre_total]; 610 mpc->rxbufs_pre[mpc->rxbpre_total] = NULL; 611 612 /* Deallocate the array after all buffers are gone */ 613 if (!mpc->rxbpre_total) 614 mana_pre_dealloc_rxbufs(mpc); 615 616 return va; 617 } 618 619 /* Get RX buffer's data size, alloc size, XDP headroom based on MTU */ 620 static void mana_get_rxbuf_cfg(int mtu, u32 *datasize, u32 *alloc_size, 621 u32 *headroom) 622 { 623 if (mtu > MANA_XDP_MTU_MAX) 624 *headroom = 0; /* no support for XDP */ 625 else 626 *headroom = XDP_PACKET_HEADROOM; 627 628 *alloc_size = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD + *headroom); 629 630 /* Using page pool in this case, so alloc_size is PAGE_SIZE */ 631 if (*alloc_size < PAGE_SIZE) 632 *alloc_size = PAGE_SIZE; 633 634 *datasize = mtu + ETH_HLEN; 635 } 636 637 int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu, int num_queues) 638 { 639 struct device *dev; 640 struct page *page; 641 dma_addr_t da; 642 int num_rxb; 643 void *va; 644 int i; 645 646 mana_get_rxbuf_cfg(new_mtu, &mpc->rxbpre_datasize, 647 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom); 648 649 dev = mpc->ac->gdma_dev->gdma_context->dev; 650 651 num_rxb = num_queues * mpc->rx_queue_size; 652 653 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n"); 654 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL); 655 if (!mpc->rxbufs_pre) 656 goto error; 657 658 mpc->das_pre = kmalloc_array(num_rxb, sizeof(dma_addr_t), GFP_KERNEL); 659 if (!mpc->das_pre) 660 goto error; 661 662 mpc->rxbpre_total = 0; 663 664 for (i = 0; i < num_rxb; i++) { 665 page = dev_alloc_pages(get_order(mpc->rxbpre_alloc_size)); 666 if (!page) 667 goto error; 668 669 va = page_to_virt(page); 670 671 da = dma_map_single(dev, va + mpc->rxbpre_headroom, 672 mpc->rxbpre_datasize, DMA_FROM_DEVICE); 673 if (dma_mapping_error(dev, da)) { 674 put_page(page); 675 goto error; 676 } 677 678 mpc->rxbufs_pre[i] = va; 679 mpc->das_pre[i] = da; 680 mpc->rxbpre_total = i + 1; 681 } 682 683 return 0; 684 685 error: 686 netdev_err(mpc->ndev, "Failed to pre-allocate RX buffers for %d queues\n", num_queues); 687 mana_pre_dealloc_rxbufs(mpc); 688 return -ENOMEM; 689 } 690 691 static int mana_change_mtu(struct net_device *ndev, int new_mtu) 692 { 693 struct mana_port_context *mpc = netdev_priv(ndev); 694 unsigned int old_mtu = ndev->mtu; 695 int err; 696 697 /* Pre-allocate buffers to prevent failure in mana_attach later */ 698 err = mana_pre_alloc_rxbufs(mpc, new_mtu, mpc->num_queues); 699 if (err) { 700 netdev_err(ndev, "Insufficient memory for new MTU\n"); 701 return err; 702 } 703 704 err = mana_detach(ndev, false); 705 if (err) { 706 netdev_err(ndev, "mana_detach failed: %d\n", err); 707 goto out; 708 } 709 710 WRITE_ONCE(ndev->mtu, new_mtu); 711 712 err = mana_attach(ndev); 713 if (err) { 714 netdev_err(ndev, "mana_attach failed: %d\n", err); 715 WRITE_ONCE(ndev->mtu, old_mtu); 716 } 717 718 out: 719 mana_pre_dealloc_rxbufs(mpc); 720 return err; 721 } 722 723 static const struct net_device_ops mana_devops = { 724 .ndo_open = mana_open, 725 .ndo_stop = mana_close, 726 .ndo_select_queue = mana_select_queue, 727 .ndo_start_xmit = mana_start_xmit, 728 .ndo_validate_addr = eth_validate_addr, 729 .ndo_get_stats64 = mana_get_stats64, 730 .ndo_bpf = mana_bpf, 731 .ndo_xdp_xmit = mana_xdp_xmit, 732 .ndo_change_mtu = mana_change_mtu, 733 }; 734 735 static void mana_cleanup_port_context(struct mana_port_context *apc) 736 { 737 /* 738 * make sure subsequent cleanup attempts don't end up removing already 739 * cleaned dentry pointer 740 */ 741 debugfs_remove(apc->mana_port_debugfs); 742 apc->mana_port_debugfs = NULL; 743 kfree(apc->rxqs); 744 apc->rxqs = NULL; 745 } 746 747 static void mana_cleanup_indir_table(struct mana_port_context *apc) 748 { 749 apc->indir_table_sz = 0; 750 kfree(apc->indir_table); 751 kfree(apc->rxobj_table); 752 } 753 754 static int mana_init_port_context(struct mana_port_context *apc) 755 { 756 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 757 GFP_KERNEL); 758 759 return !apc->rxqs ? -ENOMEM : 0; 760 } 761 762 static int mana_send_request(struct mana_context *ac, void *in_buf, 763 u32 in_len, void *out_buf, u32 out_len) 764 { 765 struct gdma_context *gc = ac->gdma_dev->gdma_context; 766 struct gdma_resp_hdr *resp = out_buf; 767 struct gdma_req_hdr *req = in_buf; 768 struct device *dev = gc->dev; 769 static atomic_t activity_id; 770 int err; 771 772 req->dev_id = gc->mana.dev_id; 773 req->activity_id = atomic_inc_return(&activity_id); 774 775 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 776 out_buf); 777 if (err || resp->status) { 778 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 779 err, resp->status); 780 return err ? err : -EPROTO; 781 } 782 783 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 784 req->activity_id != resp->activity_id) { 785 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 786 req->dev_id.as_uint32, resp->dev_id.as_uint32, 787 req->activity_id, resp->activity_id); 788 return -EPROTO; 789 } 790 791 return 0; 792 } 793 794 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 795 const enum mana_command_code expected_code, 796 const u32 min_size) 797 { 798 if (resp_hdr->response.msg_type != expected_code) 799 return -EPROTO; 800 801 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 802 return -EPROTO; 803 804 if (resp_hdr->response.msg_size < min_size) 805 return -EPROTO; 806 807 return 0; 808 } 809 810 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 811 { 812 struct mana_register_hw_vport_resp resp = {}; 813 struct mana_register_hw_vport_req req = {}; 814 int err; 815 816 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 817 sizeof(req), sizeof(resp)); 818 req.attached_gfid = 1; 819 req.is_pf_default_vport = 1; 820 req.allow_all_ether_types = 1; 821 822 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 823 sizeof(resp)); 824 if (err) { 825 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 826 return err; 827 } 828 829 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 830 sizeof(resp)); 831 if (err || resp.hdr.status) { 832 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 833 err, resp.hdr.status); 834 return err ? err : -EPROTO; 835 } 836 837 apc->port_handle = resp.hw_vport_handle; 838 return 0; 839 } 840 841 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 842 { 843 struct mana_deregister_hw_vport_resp resp = {}; 844 struct mana_deregister_hw_vport_req req = {}; 845 int err; 846 847 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 848 sizeof(req), sizeof(resp)); 849 req.hw_vport_handle = apc->port_handle; 850 851 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 852 sizeof(resp)); 853 if (err) { 854 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 855 err); 856 return; 857 } 858 859 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 860 sizeof(resp)); 861 if (err || resp.hdr.status) 862 netdev_err(apc->ndev, 863 "Failed to deregister hw vPort: %d, 0x%x\n", 864 err, resp.hdr.status); 865 } 866 867 static int mana_pf_register_filter(struct mana_port_context *apc) 868 { 869 struct mana_register_filter_resp resp = {}; 870 struct mana_register_filter_req req = {}; 871 int err; 872 873 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 874 sizeof(req), sizeof(resp)); 875 req.vport = apc->port_handle; 876 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 877 878 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 879 sizeof(resp)); 880 if (err) { 881 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 882 return err; 883 } 884 885 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 886 sizeof(resp)); 887 if (err || resp.hdr.status) { 888 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 889 err, resp.hdr.status); 890 return err ? err : -EPROTO; 891 } 892 893 apc->pf_filter_handle = resp.filter_handle; 894 return 0; 895 } 896 897 static void mana_pf_deregister_filter(struct mana_port_context *apc) 898 { 899 struct mana_deregister_filter_resp resp = {}; 900 struct mana_deregister_filter_req req = {}; 901 int err; 902 903 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 904 sizeof(req), sizeof(resp)); 905 req.filter_handle = apc->pf_filter_handle; 906 907 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 908 sizeof(resp)); 909 if (err) { 910 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 911 err); 912 return; 913 } 914 915 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 916 sizeof(resp)); 917 if (err || resp.hdr.status) 918 netdev_err(apc->ndev, 919 "Failed to deregister filter: %d, 0x%x\n", 920 err, resp.hdr.status); 921 } 922 923 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 924 u32 proto_minor_ver, u32 proto_micro_ver, 925 u16 *max_num_vports, u8 *bm_hostmode) 926 { 927 struct gdma_context *gc = ac->gdma_dev->gdma_context; 928 struct mana_query_device_cfg_resp resp = {}; 929 struct mana_query_device_cfg_req req = {}; 930 struct device *dev = gc->dev; 931 int err = 0; 932 933 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 934 sizeof(req), sizeof(resp)); 935 936 req.hdr.resp.msg_version = GDMA_MESSAGE_V3; 937 938 req.proto_major_ver = proto_major_ver; 939 req.proto_minor_ver = proto_minor_ver; 940 req.proto_micro_ver = proto_micro_ver; 941 942 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 943 if (err) { 944 dev_err(dev, "Failed to query config: %d", err); 945 return err; 946 } 947 948 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 949 sizeof(resp)); 950 if (err || resp.hdr.status) { 951 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 952 resp.hdr.status); 953 if (!err) 954 err = -EPROTO; 955 return err; 956 } 957 958 *max_num_vports = resp.max_num_vports; 959 960 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V2) 961 gc->adapter_mtu = resp.adapter_mtu; 962 else 963 gc->adapter_mtu = ETH_FRAME_LEN; 964 965 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V3) 966 *bm_hostmode = resp.bm_hostmode; 967 else 968 *bm_hostmode = 0; 969 970 debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc->adapter_mtu); 971 972 return 0; 973 } 974 975 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 976 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 977 { 978 struct mana_query_vport_cfg_resp resp = {}; 979 struct mana_query_vport_cfg_req req = {}; 980 int err; 981 982 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 983 sizeof(req), sizeof(resp)); 984 985 req.vport_index = vport_index; 986 987 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 988 sizeof(resp)); 989 if (err) 990 return err; 991 992 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 993 sizeof(resp)); 994 if (err) 995 return err; 996 997 if (resp.hdr.status) 998 return -EPROTO; 999 1000 *max_sq = resp.max_num_sq; 1001 *max_rq = resp.max_num_rq; 1002 if (resp.num_indirection_ent > 0 && 1003 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE && 1004 is_power_of_2(resp.num_indirection_ent)) { 1005 *num_indir_entry = resp.num_indirection_ent; 1006 } else { 1007 netdev_warn(apc->ndev, 1008 "Setting indirection table size to default %d for vPort %d\n", 1009 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx); 1010 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE; 1011 } 1012 1013 apc->port_handle = resp.vport; 1014 ether_addr_copy(apc->mac_addr, resp.mac_addr); 1015 1016 return 0; 1017 } 1018 1019 void mana_uncfg_vport(struct mana_port_context *apc) 1020 { 1021 mutex_lock(&apc->vport_mutex); 1022 apc->vport_use_count--; 1023 WARN_ON(apc->vport_use_count < 0); 1024 mutex_unlock(&apc->vport_mutex); 1025 } 1026 EXPORT_SYMBOL_NS(mana_uncfg_vport, "NET_MANA"); 1027 1028 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 1029 u32 doorbell_pg_id) 1030 { 1031 struct mana_config_vport_resp resp = {}; 1032 struct mana_config_vport_req req = {}; 1033 int err; 1034 1035 /* This function is used to program the Ethernet port in the hardware 1036 * table. It can be called from the Ethernet driver or the RDMA driver. 1037 * 1038 * For Ethernet usage, the hardware supports only one active user on a 1039 * physical port. The driver checks on the port usage before programming 1040 * the hardware when creating the RAW QP (RDMA driver) or exposing the 1041 * device to kernel NET layer (Ethernet driver). 1042 * 1043 * Because the RDMA driver doesn't know in advance which QP type the 1044 * user will create, it exposes the device with all its ports. The user 1045 * may not be able to create RAW QP on a port if this port is already 1046 * in used by the Ethernet driver from the kernel. 1047 * 1048 * This physical port limitation only applies to the RAW QP. For RC QP, 1049 * the hardware doesn't have this limitation. The user can create RC 1050 * QPs on a physical port up to the hardware limits independent of the 1051 * Ethernet usage on the same port. 1052 */ 1053 mutex_lock(&apc->vport_mutex); 1054 if (apc->vport_use_count > 0) { 1055 mutex_unlock(&apc->vport_mutex); 1056 return -EBUSY; 1057 } 1058 apc->vport_use_count++; 1059 mutex_unlock(&apc->vport_mutex); 1060 1061 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1062 sizeof(req), sizeof(resp)); 1063 req.vport = apc->port_handle; 1064 req.pdid = protection_dom_id; 1065 req.doorbell_pageid = doorbell_pg_id; 1066 1067 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1068 sizeof(resp)); 1069 if (err) { 1070 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1071 goto out; 1072 } 1073 1074 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1075 sizeof(resp)); 1076 if (err || resp.hdr.status) { 1077 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1078 err, resp.hdr.status); 1079 if (!err) 1080 err = -EPROTO; 1081 1082 goto out; 1083 } 1084 1085 apc->tx_shortform_allowed = resp.short_form_allowed; 1086 apc->tx_vp_offset = resp.tx_vport_offset; 1087 1088 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 1089 apc->port_handle, protection_dom_id, doorbell_pg_id); 1090 out: 1091 if (err) 1092 mana_uncfg_vport(apc); 1093 1094 return err; 1095 } 1096 EXPORT_SYMBOL_NS(mana_cfg_vport, "NET_MANA"); 1097 1098 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1099 enum TRI_STATE rx, 1100 bool update_default_rxobj, bool update_key, 1101 bool update_tab) 1102 { 1103 struct mana_cfg_rx_steer_req_v2 *req; 1104 struct mana_cfg_rx_steer_resp resp = {}; 1105 struct net_device *ndev = apc->ndev; 1106 u32 req_buf_size; 1107 int err; 1108 1109 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz); 1110 req = kzalloc(req_buf_size, GFP_KERNEL); 1111 if (!req) 1112 return -ENOMEM; 1113 1114 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1115 sizeof(resp)); 1116 1117 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1118 1119 req->vport = apc->port_handle; 1120 req->num_indir_entries = apc->indir_table_sz; 1121 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, 1122 indir_tab); 1123 req->rx_enable = rx; 1124 req->rss_enable = apc->rss_state; 1125 req->update_default_rxobj = update_default_rxobj; 1126 req->update_hashkey = update_key; 1127 req->update_indir_tab = update_tab; 1128 req->default_rxobj = apc->default_rxobj; 1129 req->cqe_coalescing_enable = 0; 1130 1131 if (update_key) 1132 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1133 1134 if (update_tab) 1135 memcpy(req->indir_tab, apc->rxobj_table, 1136 flex_array_size(req, indir_tab, req->num_indir_entries)); 1137 1138 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1139 sizeof(resp)); 1140 if (err) { 1141 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1142 goto out; 1143 } 1144 1145 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1146 sizeof(resp)); 1147 if (err) { 1148 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1149 goto out; 1150 } 1151 1152 if (resp.hdr.status) { 1153 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1154 resp.hdr.status); 1155 err = -EPROTO; 1156 } 1157 1158 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1159 apc->port_handle, apc->indir_table_sz); 1160 out: 1161 kfree(req); 1162 return err; 1163 } 1164 1165 int mana_create_wq_obj(struct mana_port_context *apc, 1166 mana_handle_t vport, 1167 u32 wq_type, struct mana_obj_spec *wq_spec, 1168 struct mana_obj_spec *cq_spec, 1169 mana_handle_t *wq_obj) 1170 { 1171 struct mana_create_wqobj_resp resp = {}; 1172 struct mana_create_wqobj_req req = {}; 1173 struct net_device *ndev = apc->ndev; 1174 int err; 1175 1176 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1177 sizeof(req), sizeof(resp)); 1178 req.vport = vport; 1179 req.wq_type = wq_type; 1180 req.wq_gdma_region = wq_spec->gdma_region; 1181 req.cq_gdma_region = cq_spec->gdma_region; 1182 req.wq_size = wq_spec->queue_size; 1183 req.cq_size = cq_spec->queue_size; 1184 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1185 req.cq_parent_qid = cq_spec->attached_eq; 1186 1187 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1188 sizeof(resp)); 1189 if (err) { 1190 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1191 goto out; 1192 } 1193 1194 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1195 sizeof(resp)); 1196 if (err || resp.hdr.status) { 1197 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1198 resp.hdr.status); 1199 if (!err) 1200 err = -EPROTO; 1201 goto out; 1202 } 1203 1204 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1205 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1206 err = -EPROTO; 1207 goto out; 1208 } 1209 1210 *wq_obj = resp.wq_obj; 1211 wq_spec->queue_index = resp.wq_id; 1212 cq_spec->queue_index = resp.cq_id; 1213 1214 return 0; 1215 out: 1216 return err; 1217 } 1218 EXPORT_SYMBOL_NS(mana_create_wq_obj, "NET_MANA"); 1219 1220 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1221 mana_handle_t wq_obj) 1222 { 1223 struct mana_destroy_wqobj_resp resp = {}; 1224 struct mana_destroy_wqobj_req req = {}; 1225 struct net_device *ndev = apc->ndev; 1226 int err; 1227 1228 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1229 sizeof(req), sizeof(resp)); 1230 req.wq_type = wq_type; 1231 req.wq_obj_handle = wq_obj; 1232 1233 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1234 sizeof(resp)); 1235 if (err) { 1236 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1237 return; 1238 } 1239 1240 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1241 sizeof(resp)); 1242 if (err || resp.hdr.status) 1243 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1244 resp.hdr.status); 1245 } 1246 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, "NET_MANA"); 1247 1248 static void mana_destroy_eq(struct mana_context *ac) 1249 { 1250 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1251 struct gdma_queue *eq; 1252 int i; 1253 1254 if (!ac->eqs) 1255 return; 1256 1257 debugfs_remove_recursive(ac->mana_eqs_debugfs); 1258 ac->mana_eqs_debugfs = NULL; 1259 1260 for (i = 0; i < gc->max_num_queues; i++) { 1261 eq = ac->eqs[i].eq; 1262 if (!eq) 1263 continue; 1264 1265 mana_gd_destroy_queue(gc, eq); 1266 } 1267 1268 kfree(ac->eqs); 1269 ac->eqs = NULL; 1270 } 1271 1272 static void mana_create_eq_debugfs(struct mana_context *ac, int i) 1273 { 1274 struct mana_eq eq = ac->eqs[i]; 1275 char eqnum[32]; 1276 1277 sprintf(eqnum, "eq%d", i); 1278 eq.mana_eq_debugfs = debugfs_create_dir(eqnum, ac->mana_eqs_debugfs); 1279 debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head); 1280 debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail); 1281 debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops); 1282 } 1283 1284 static int mana_create_eq(struct mana_context *ac) 1285 { 1286 struct gdma_dev *gd = ac->gdma_dev; 1287 struct gdma_context *gc = gd->gdma_context; 1288 struct gdma_queue_spec spec = {}; 1289 int err; 1290 int i; 1291 1292 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq), 1293 GFP_KERNEL); 1294 if (!ac->eqs) 1295 return -ENOMEM; 1296 1297 spec.type = GDMA_EQ; 1298 spec.monitor_avl_buf = false; 1299 spec.queue_size = EQ_SIZE; 1300 spec.eq.callback = NULL; 1301 spec.eq.context = ac->eqs; 1302 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1303 1304 ac->mana_eqs_debugfs = debugfs_create_dir("EQs", gc->mana_pci_debugfs); 1305 1306 for (i = 0; i < gc->max_num_queues; i++) { 1307 spec.eq.msix_index = (i + 1) % gc->num_msix_usable; 1308 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1309 if (err) { 1310 dev_err(gc->dev, "Failed to create EQ %d : %d\n", i, err); 1311 goto out; 1312 } 1313 mana_create_eq_debugfs(ac, i); 1314 } 1315 1316 return 0; 1317 out: 1318 mana_destroy_eq(ac); 1319 return err; 1320 } 1321 1322 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1323 { 1324 struct mana_fence_rq_resp resp = {}; 1325 struct mana_fence_rq_req req = {}; 1326 int err; 1327 1328 init_completion(&rxq->fence_event); 1329 1330 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1331 sizeof(req), sizeof(resp)); 1332 req.wq_obj_handle = rxq->rxobj; 1333 1334 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1335 sizeof(resp)); 1336 if (err) { 1337 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1338 rxq->rxq_idx, err); 1339 return err; 1340 } 1341 1342 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1343 if (err || resp.hdr.status) { 1344 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1345 rxq->rxq_idx, err, resp.hdr.status); 1346 if (!err) 1347 err = -EPROTO; 1348 1349 return err; 1350 } 1351 1352 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1353 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1354 rxq->rxq_idx); 1355 return -ETIMEDOUT; 1356 } 1357 1358 return 0; 1359 } 1360 1361 static void mana_fence_rqs(struct mana_port_context *apc) 1362 { 1363 unsigned int rxq_idx; 1364 struct mana_rxq *rxq; 1365 int err; 1366 1367 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1368 rxq = apc->rxqs[rxq_idx]; 1369 err = mana_fence_rq(apc, rxq); 1370 1371 /* In case of any error, use sleep instead. */ 1372 if (err) 1373 msleep(100); 1374 } 1375 } 1376 1377 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1378 { 1379 u32 used_space_old; 1380 u32 used_space_new; 1381 1382 used_space_old = wq->head - wq->tail; 1383 used_space_new = wq->head - (wq->tail + num_units); 1384 1385 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1386 return -ERANGE; 1387 1388 wq->tail += num_units; 1389 return 0; 1390 } 1391 1392 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1393 { 1394 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1395 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1396 struct device *dev = gc->dev; 1397 int hsg, i; 1398 1399 /* Number of SGEs of linear part */ 1400 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1401 1402 for (i = 0; i < hsg; i++) 1403 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1404 DMA_TO_DEVICE); 1405 1406 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1407 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1408 DMA_TO_DEVICE); 1409 } 1410 1411 static void mana_poll_tx_cq(struct mana_cq *cq) 1412 { 1413 struct gdma_comp *completions = cq->gdma_comp_buf; 1414 struct gdma_posted_wqe_info *wqe_info; 1415 unsigned int pkt_transmitted = 0; 1416 unsigned int wqe_unit_cnt = 0; 1417 struct mana_txq *txq = cq->txq; 1418 struct mana_port_context *apc; 1419 struct netdev_queue *net_txq; 1420 struct gdma_queue *gdma_wq; 1421 unsigned int avail_space; 1422 struct net_device *ndev; 1423 struct sk_buff *skb; 1424 bool txq_stopped; 1425 int comp_read; 1426 int i; 1427 1428 ndev = txq->ndev; 1429 apc = netdev_priv(ndev); 1430 1431 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1432 CQE_POLLING_BUFFER); 1433 1434 if (comp_read < 1) 1435 return; 1436 1437 for (i = 0; i < comp_read; i++) { 1438 struct mana_tx_comp_oob *cqe_oob; 1439 1440 if (WARN_ON_ONCE(!completions[i].is_sq)) 1441 return; 1442 1443 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1444 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1445 MANA_CQE_COMPLETION)) 1446 return; 1447 1448 switch (cqe_oob->cqe_hdr.cqe_type) { 1449 case CQE_TX_OKAY: 1450 break; 1451 1452 case CQE_TX_SA_DROP: 1453 case CQE_TX_MTU_DROP: 1454 case CQE_TX_INVALID_OOB: 1455 case CQE_TX_INVALID_ETH_TYPE: 1456 case CQE_TX_HDR_PROCESSING_ERROR: 1457 case CQE_TX_VF_DISABLED: 1458 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1459 case CQE_TX_VPORT_DISABLED: 1460 case CQE_TX_VLAN_TAGGING_VIOLATION: 1461 if (net_ratelimit()) 1462 netdev_err(ndev, "TX: CQE error %d\n", 1463 cqe_oob->cqe_hdr.cqe_type); 1464 1465 apc->eth_stats.tx_cqe_err++; 1466 break; 1467 1468 default: 1469 /* If the CQE type is unknown, log an error, 1470 * and still free the SKB, update tail, etc. 1471 */ 1472 if (net_ratelimit()) 1473 netdev_err(ndev, "TX: unknown CQE type %d\n", 1474 cqe_oob->cqe_hdr.cqe_type); 1475 1476 apc->eth_stats.tx_cqe_unknown_type++; 1477 break; 1478 } 1479 1480 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1481 return; 1482 1483 skb = skb_dequeue(&txq->pending_skbs); 1484 if (WARN_ON_ONCE(!skb)) 1485 return; 1486 1487 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1488 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1489 1490 mana_unmap_skb(skb, apc); 1491 1492 napi_consume_skb(skb, cq->budget); 1493 1494 pkt_transmitted++; 1495 } 1496 1497 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1498 return; 1499 1500 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1501 1502 gdma_wq = txq->gdma_sq; 1503 avail_space = mana_gd_wq_avail_space(gdma_wq); 1504 1505 /* Ensure tail updated before checking q stop */ 1506 smp_mb(); 1507 1508 net_txq = txq->net_txq; 1509 txq_stopped = netif_tx_queue_stopped(net_txq); 1510 1511 /* Ensure checking txq_stopped before apc->port_is_up. */ 1512 smp_rmb(); 1513 1514 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1515 netif_tx_wake_queue(net_txq); 1516 apc->eth_stats.wake_queue++; 1517 } 1518 1519 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1520 WARN_ON_ONCE(1); 1521 1522 cq->work_done = pkt_transmitted; 1523 } 1524 1525 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1526 { 1527 struct mana_recv_buf_oob *recv_buf_oob; 1528 u32 curr_index; 1529 int err; 1530 1531 curr_index = rxq->buf_index++; 1532 if (rxq->buf_index == rxq->num_rx_buf) 1533 rxq->buf_index = 0; 1534 1535 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1536 1537 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1538 &recv_buf_oob->wqe_inf); 1539 if (WARN_ON_ONCE(err)) 1540 return; 1541 1542 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1543 } 1544 1545 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1546 uint pkt_len, struct xdp_buff *xdp) 1547 { 1548 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1549 1550 if (!skb) 1551 return NULL; 1552 1553 if (xdp->data_hard_start) { 1554 u32 metasize = xdp->data - xdp->data_meta; 1555 1556 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1557 skb_put(skb, xdp->data_end - xdp->data); 1558 if (metasize) 1559 skb_metadata_set(skb, metasize); 1560 return skb; 1561 } 1562 1563 skb_reserve(skb, rxq->headroom); 1564 skb_put(skb, pkt_len); 1565 1566 return skb; 1567 } 1568 1569 static void mana_rx_skb(void *buf_va, bool from_pool, 1570 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) 1571 { 1572 struct mana_stats_rx *rx_stats = &rxq->stats; 1573 struct net_device *ndev = rxq->ndev; 1574 uint pkt_len = cqe->ppi[0].pkt_len; 1575 u16 rxq_idx = rxq->rxq_idx; 1576 struct napi_struct *napi; 1577 struct xdp_buff xdp = {}; 1578 struct sk_buff *skb; 1579 u32 hash_value; 1580 u32 act; 1581 1582 rxq->rx_cq.work_done++; 1583 napi = &rxq->rx_cq.napi; 1584 1585 if (!buf_va) { 1586 ++ndev->stats.rx_dropped; 1587 return; 1588 } 1589 1590 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1591 1592 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1593 return; 1594 1595 if (act != XDP_PASS && act != XDP_TX) 1596 goto drop_xdp; 1597 1598 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1599 1600 if (!skb) 1601 goto drop; 1602 1603 if (from_pool) 1604 skb_mark_for_recycle(skb); 1605 1606 skb->dev = napi->dev; 1607 1608 skb->protocol = eth_type_trans(skb, ndev); 1609 skb_checksum_none_assert(skb); 1610 skb_record_rx_queue(skb, rxq_idx); 1611 1612 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1613 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1614 skb->ip_summed = CHECKSUM_UNNECESSARY; 1615 } 1616 1617 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1618 hash_value = cqe->ppi[0].pkt_hash; 1619 1620 if (cqe->rx_hashtype & MANA_HASH_L4) 1621 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1622 else 1623 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1624 } 1625 1626 if (cqe->rx_vlantag_present) { 1627 u16 vlan_tci = cqe->rx_vlan_id; 1628 1629 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1630 } 1631 1632 u64_stats_update_begin(&rx_stats->syncp); 1633 rx_stats->packets++; 1634 rx_stats->bytes += pkt_len; 1635 1636 if (act == XDP_TX) 1637 rx_stats->xdp_tx++; 1638 u64_stats_update_end(&rx_stats->syncp); 1639 1640 if (act == XDP_TX) { 1641 skb_set_queue_mapping(skb, rxq_idx); 1642 mana_xdp_tx(skb, ndev); 1643 return; 1644 } 1645 1646 napi_gro_receive(napi, skb); 1647 1648 return; 1649 1650 drop_xdp: 1651 u64_stats_update_begin(&rx_stats->syncp); 1652 rx_stats->xdp_drop++; 1653 u64_stats_update_end(&rx_stats->syncp); 1654 1655 drop: 1656 if (from_pool) { 1657 page_pool_recycle_direct(rxq->page_pool, 1658 virt_to_head_page(buf_va)); 1659 } else { 1660 WARN_ON_ONCE(rxq->xdp_save_va); 1661 /* Save for reuse */ 1662 rxq->xdp_save_va = buf_va; 1663 } 1664 1665 ++ndev->stats.rx_dropped; 1666 1667 return; 1668 } 1669 1670 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 1671 dma_addr_t *da, bool *from_pool) 1672 { 1673 struct page *page; 1674 void *va; 1675 1676 *from_pool = false; 1677 1678 /* Reuse XDP dropped page if available */ 1679 if (rxq->xdp_save_va) { 1680 va = rxq->xdp_save_va; 1681 rxq->xdp_save_va = NULL; 1682 } else { 1683 page = page_pool_dev_alloc_pages(rxq->page_pool); 1684 if (!page) 1685 return NULL; 1686 1687 *from_pool = true; 1688 va = page_to_virt(page); 1689 } 1690 1691 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 1692 DMA_FROM_DEVICE); 1693 if (dma_mapping_error(dev, *da)) { 1694 if (*from_pool) 1695 page_pool_put_full_page(rxq->page_pool, page, false); 1696 else 1697 put_page(virt_to_head_page(va)); 1698 1699 return NULL; 1700 } 1701 1702 return va; 1703 } 1704 1705 /* Allocate frag for rx buffer, and save the old buf */ 1706 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 1707 struct mana_recv_buf_oob *rxoob, void **old_buf, 1708 bool *old_fp) 1709 { 1710 bool from_pool; 1711 dma_addr_t da; 1712 void *va; 1713 1714 va = mana_get_rxfrag(rxq, dev, &da, &from_pool); 1715 if (!va) 1716 return; 1717 1718 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 1719 DMA_FROM_DEVICE); 1720 *old_buf = rxoob->buf_va; 1721 *old_fp = rxoob->from_pool; 1722 1723 rxoob->buf_va = va; 1724 rxoob->sgl[0].address = da; 1725 rxoob->from_pool = from_pool; 1726 } 1727 1728 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1729 struct gdma_comp *cqe) 1730 { 1731 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1732 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1733 struct net_device *ndev = rxq->ndev; 1734 struct mana_recv_buf_oob *rxbuf_oob; 1735 struct mana_port_context *apc; 1736 struct device *dev = gc->dev; 1737 void *old_buf = NULL; 1738 u32 curr, pktlen; 1739 bool old_fp; 1740 1741 apc = netdev_priv(ndev); 1742 1743 switch (oob->cqe_hdr.cqe_type) { 1744 case CQE_RX_OKAY: 1745 break; 1746 1747 case CQE_RX_TRUNCATED: 1748 ++ndev->stats.rx_dropped; 1749 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1750 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1751 goto drop; 1752 1753 case CQE_RX_COALESCED_4: 1754 netdev_err(ndev, "RX coalescing is unsupported\n"); 1755 apc->eth_stats.rx_coalesced_err++; 1756 return; 1757 1758 case CQE_RX_OBJECT_FENCE: 1759 complete(&rxq->fence_event); 1760 return; 1761 1762 default: 1763 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1764 oob->cqe_hdr.cqe_type); 1765 apc->eth_stats.rx_cqe_unknown_type++; 1766 return; 1767 } 1768 1769 pktlen = oob->ppi[0].pkt_len; 1770 1771 if (pktlen == 0) { 1772 /* data packets should never have packetlength of zero */ 1773 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1774 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1775 return; 1776 } 1777 1778 curr = rxq->buf_index; 1779 rxbuf_oob = &rxq->rx_oobs[curr]; 1780 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1781 1782 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 1783 1784 /* Unsuccessful refill will have old_buf == NULL. 1785 * In this case, mana_rx_skb() will drop the packet. 1786 */ 1787 mana_rx_skb(old_buf, old_fp, oob, rxq); 1788 1789 drop: 1790 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1791 1792 mana_post_pkt_rxq(rxq); 1793 } 1794 1795 static void mana_poll_rx_cq(struct mana_cq *cq) 1796 { 1797 struct gdma_comp *comp = cq->gdma_comp_buf; 1798 struct mana_rxq *rxq = cq->rxq; 1799 int comp_read, i; 1800 1801 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1802 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1803 1804 rxq->xdp_flush = false; 1805 1806 for (i = 0; i < comp_read; i++) { 1807 if (WARN_ON_ONCE(comp[i].is_sq)) 1808 return; 1809 1810 /* verify recv cqe references the right rxq */ 1811 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1812 return; 1813 1814 mana_process_rx_cqe(rxq, cq, &comp[i]); 1815 } 1816 1817 if (comp_read > 0) { 1818 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1819 1820 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 1821 } 1822 1823 if (rxq->xdp_flush) 1824 xdp_do_flush(); 1825 } 1826 1827 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1828 { 1829 struct mana_cq *cq = context; 1830 int w; 1831 1832 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1833 1834 if (cq->type == MANA_CQ_TYPE_RX) 1835 mana_poll_rx_cq(cq); 1836 else 1837 mana_poll_tx_cq(cq); 1838 1839 w = cq->work_done; 1840 cq->work_done_since_doorbell += w; 1841 1842 if (w < cq->budget) { 1843 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT); 1844 cq->work_done_since_doorbell = 0; 1845 napi_complete_done(&cq->napi, w); 1846 } else if (cq->work_done_since_doorbell > 1847 cq->gdma_cq->queue_size / COMP_ENTRY_SIZE * 4) { 1848 /* MANA hardware requires at least one doorbell ring every 8 1849 * wraparounds of CQ even if there is no need to arm the CQ. 1850 * This driver rings the doorbell as soon as we have exceeded 1851 * 4 wraparounds. 1852 */ 1853 mana_gd_ring_cq(gdma_queue, 0); 1854 cq->work_done_since_doorbell = 0; 1855 } 1856 1857 return w; 1858 } 1859 1860 static int mana_poll(struct napi_struct *napi, int budget) 1861 { 1862 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1863 int w; 1864 1865 cq->work_done = 0; 1866 cq->budget = budget; 1867 1868 w = mana_cq_handler(cq, cq->gdma_cq); 1869 1870 return min(w, budget); 1871 } 1872 1873 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1874 { 1875 struct mana_cq *cq = context; 1876 1877 napi_schedule_irqoff(&cq->napi); 1878 } 1879 1880 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1881 { 1882 struct gdma_dev *gd = apc->ac->gdma_dev; 1883 1884 if (!cq->gdma_cq) 1885 return; 1886 1887 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1888 } 1889 1890 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1891 { 1892 struct gdma_dev *gd = apc->ac->gdma_dev; 1893 1894 if (!txq->gdma_sq) 1895 return; 1896 1897 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1898 } 1899 1900 static void mana_destroy_txq(struct mana_port_context *apc) 1901 { 1902 struct napi_struct *napi; 1903 int i; 1904 1905 if (!apc->tx_qp) 1906 return; 1907 1908 for (i = 0; i < apc->num_queues; i++) { 1909 debugfs_remove_recursive(apc->tx_qp[i].mana_tx_debugfs); 1910 apc->tx_qp[i].mana_tx_debugfs = NULL; 1911 1912 napi = &apc->tx_qp[i].tx_cq.napi; 1913 if (apc->tx_qp[i].txq.napi_initialized) { 1914 napi_synchronize(napi); 1915 napi_disable(napi); 1916 netif_napi_del(napi); 1917 apc->tx_qp[i].txq.napi_initialized = false; 1918 } 1919 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1920 1921 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1922 1923 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1924 } 1925 1926 kfree(apc->tx_qp); 1927 apc->tx_qp = NULL; 1928 } 1929 1930 static void mana_create_txq_debugfs(struct mana_port_context *apc, int idx) 1931 { 1932 struct mana_tx_qp *tx_qp = &apc->tx_qp[idx]; 1933 char qnum[32]; 1934 1935 sprintf(qnum, "TX-%d", idx); 1936 tx_qp->mana_tx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 1937 debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs, 1938 &tx_qp->txq.gdma_sq->head); 1939 debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs, 1940 &tx_qp->txq.gdma_sq->tail); 1941 debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debugfs, 1942 &tx_qp->txq.pending_skbs.qlen); 1943 debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs, 1944 &tx_qp->tx_cq.gdma_cq->head); 1945 debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs, 1946 &tx_qp->tx_cq.gdma_cq->tail); 1947 debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs, 1948 &tx_qp->tx_cq.budget); 1949 debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs, 1950 tx_qp->txq.gdma_sq, &mana_dbg_q_fops); 1951 debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs, 1952 tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops); 1953 } 1954 1955 static int mana_create_txq(struct mana_port_context *apc, 1956 struct net_device *net) 1957 { 1958 struct mana_context *ac = apc->ac; 1959 struct gdma_dev *gd = ac->gdma_dev; 1960 struct mana_obj_spec wq_spec; 1961 struct mana_obj_spec cq_spec; 1962 struct gdma_queue_spec spec; 1963 struct gdma_context *gc; 1964 struct mana_txq *txq; 1965 struct mana_cq *cq; 1966 u32 txq_size; 1967 u32 cq_size; 1968 int err; 1969 int i; 1970 1971 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1972 GFP_KERNEL); 1973 if (!apc->tx_qp) 1974 return -ENOMEM; 1975 1976 /* The minimum size of the WQE is 32 bytes, hence 1977 * apc->tx_queue_size represents the maximum number of WQEs 1978 * the SQ can store. This value is then used to size other queues 1979 * to prevent overflow. 1980 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED, 1981 * as min val of apc->tx_queue_size is 128 and that would make 1982 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size 1983 * are always power of two 1984 */ 1985 txq_size = apc->tx_queue_size * 32; 1986 1987 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE; 1988 1989 gc = gd->gdma_context; 1990 1991 for (i = 0; i < apc->num_queues; i++) { 1992 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1993 1994 /* Create SQ */ 1995 txq = &apc->tx_qp[i].txq; 1996 1997 u64_stats_init(&txq->stats.syncp); 1998 txq->ndev = net; 1999 txq->net_txq = netdev_get_tx_queue(net, i); 2000 txq->vp_offset = apc->tx_vp_offset; 2001 txq->napi_initialized = false; 2002 skb_queue_head_init(&txq->pending_skbs); 2003 2004 memset(&spec, 0, sizeof(spec)); 2005 spec.type = GDMA_SQ; 2006 spec.monitor_avl_buf = true; 2007 spec.queue_size = txq_size; 2008 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 2009 if (err) 2010 goto out; 2011 2012 /* Create SQ's CQ */ 2013 cq = &apc->tx_qp[i].tx_cq; 2014 cq->type = MANA_CQ_TYPE_TX; 2015 2016 cq->txq = txq; 2017 2018 memset(&spec, 0, sizeof(spec)); 2019 spec.type = GDMA_CQ; 2020 spec.monitor_avl_buf = false; 2021 spec.queue_size = cq_size; 2022 spec.cq.callback = mana_schedule_napi; 2023 spec.cq.parent_eq = ac->eqs[i].eq; 2024 spec.cq.context = cq; 2025 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2026 if (err) 2027 goto out; 2028 2029 memset(&wq_spec, 0, sizeof(wq_spec)); 2030 memset(&cq_spec, 0, sizeof(cq_spec)); 2031 2032 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 2033 wq_spec.queue_size = txq->gdma_sq->queue_size; 2034 2035 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2036 cq_spec.queue_size = cq->gdma_cq->queue_size; 2037 cq_spec.modr_ctx_id = 0; 2038 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2039 2040 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 2041 &wq_spec, &cq_spec, 2042 &apc->tx_qp[i].tx_object); 2043 2044 if (err) 2045 goto out; 2046 2047 txq->gdma_sq->id = wq_spec.queue_index; 2048 cq->gdma_cq->id = cq_spec.queue_index; 2049 2050 txq->gdma_sq->mem_info.dma_region_handle = 2051 GDMA_INVALID_DMA_REGION; 2052 cq->gdma_cq->mem_info.dma_region_handle = 2053 GDMA_INVALID_DMA_REGION; 2054 2055 txq->gdma_txq_id = txq->gdma_sq->id; 2056 2057 cq->gdma_id = cq->gdma_cq->id; 2058 2059 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2060 err = -EINVAL; 2061 goto out; 2062 } 2063 2064 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2065 2066 mana_create_txq_debugfs(apc, i); 2067 2068 netif_napi_add_tx(net, &cq->napi, mana_poll); 2069 napi_enable(&cq->napi); 2070 txq->napi_initialized = true; 2071 2072 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2073 } 2074 2075 return 0; 2076 out: 2077 netdev_err(net, "Failed to create %d TX queues, %d\n", 2078 apc->num_queues, err); 2079 mana_destroy_txq(apc); 2080 return err; 2081 } 2082 2083 static void mana_destroy_rxq(struct mana_port_context *apc, 2084 struct mana_rxq *rxq, bool napi_initialized) 2085 2086 { 2087 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2088 struct mana_recv_buf_oob *rx_oob; 2089 struct device *dev = gc->dev; 2090 struct napi_struct *napi; 2091 struct page *page; 2092 int i; 2093 2094 if (!rxq) 2095 return; 2096 2097 debugfs_remove_recursive(rxq->mana_rx_debugfs); 2098 rxq->mana_rx_debugfs = NULL; 2099 2100 napi = &rxq->rx_cq.napi; 2101 2102 if (napi_initialized) { 2103 napi_synchronize(napi); 2104 2105 napi_disable(napi); 2106 2107 netif_napi_del(napi); 2108 } 2109 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2110 2111 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2112 2113 mana_deinit_cq(apc, &rxq->rx_cq); 2114 2115 if (rxq->xdp_save_va) 2116 put_page(virt_to_head_page(rxq->xdp_save_va)); 2117 2118 for (i = 0; i < rxq->num_rx_buf; i++) { 2119 rx_oob = &rxq->rx_oobs[i]; 2120 2121 if (!rx_oob->buf_va) 2122 continue; 2123 2124 dma_unmap_single(dev, rx_oob->sgl[0].address, 2125 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2126 2127 page = virt_to_head_page(rx_oob->buf_va); 2128 2129 if (rx_oob->from_pool) 2130 page_pool_put_full_page(rxq->page_pool, page, false); 2131 else 2132 put_page(page); 2133 2134 rx_oob->buf_va = NULL; 2135 } 2136 2137 page_pool_destroy(rxq->page_pool); 2138 2139 if (rxq->gdma_rq) 2140 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2141 2142 kfree(rxq); 2143 } 2144 2145 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2146 struct mana_rxq *rxq, struct device *dev) 2147 { 2148 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2149 bool from_pool = false; 2150 dma_addr_t da; 2151 void *va; 2152 2153 if (mpc->rxbufs_pre) 2154 va = mana_get_rxbuf_pre(rxq, &da); 2155 else 2156 va = mana_get_rxfrag(rxq, dev, &da, &from_pool); 2157 2158 if (!va) 2159 return -ENOMEM; 2160 2161 rx_oob->buf_va = va; 2162 rx_oob->from_pool = from_pool; 2163 2164 rx_oob->sgl[0].address = da; 2165 rx_oob->sgl[0].size = rxq->datasize; 2166 rx_oob->sgl[0].mem_key = mem_key; 2167 2168 return 0; 2169 } 2170 2171 #define MANA_WQE_HEADER_SIZE 16 2172 #define MANA_WQE_SGE_SIZE 16 2173 2174 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2175 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2176 { 2177 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2178 struct mana_recv_buf_oob *rx_oob; 2179 struct device *dev = gc->dev; 2180 u32 buf_idx; 2181 int ret; 2182 2183 WARN_ON(rxq->datasize == 0); 2184 2185 *rxq_size = 0; 2186 *cq_size = 0; 2187 2188 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2189 rx_oob = &rxq->rx_oobs[buf_idx]; 2190 memset(rx_oob, 0, sizeof(*rx_oob)); 2191 2192 rx_oob->num_sge = 1; 2193 2194 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2195 dev); 2196 if (ret) 2197 return ret; 2198 2199 rx_oob->wqe_req.sgl = rx_oob->sgl; 2200 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2201 rx_oob->wqe_req.inline_oob_size = 0; 2202 rx_oob->wqe_req.inline_oob_data = NULL; 2203 rx_oob->wqe_req.flags = 0; 2204 rx_oob->wqe_req.client_data_unit = 0; 2205 2206 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2207 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2208 *cq_size += COMP_ENTRY_SIZE; 2209 } 2210 2211 return 0; 2212 } 2213 2214 static int mana_push_wqe(struct mana_rxq *rxq) 2215 { 2216 struct mana_recv_buf_oob *rx_oob; 2217 u32 buf_idx; 2218 int err; 2219 2220 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2221 rx_oob = &rxq->rx_oobs[buf_idx]; 2222 2223 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2224 &rx_oob->wqe_inf); 2225 if (err) 2226 return -ENOSPC; 2227 } 2228 2229 return 0; 2230 } 2231 2232 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2233 { 2234 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2235 struct page_pool_params pprm = {}; 2236 int ret; 2237 2238 pprm.pool_size = mpc->rx_queue_size; 2239 pprm.nid = gc->numa_node; 2240 pprm.napi = &rxq->rx_cq.napi; 2241 pprm.netdev = rxq->ndev; 2242 pprm.order = get_order(rxq->alloc_size); 2243 2244 rxq->page_pool = page_pool_create(&pprm); 2245 2246 if (IS_ERR(rxq->page_pool)) { 2247 ret = PTR_ERR(rxq->page_pool); 2248 rxq->page_pool = NULL; 2249 return ret; 2250 } 2251 2252 return 0; 2253 } 2254 2255 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2256 u32 rxq_idx, struct mana_eq *eq, 2257 struct net_device *ndev) 2258 { 2259 struct gdma_dev *gd = apc->ac->gdma_dev; 2260 struct mana_obj_spec wq_spec; 2261 struct mana_obj_spec cq_spec; 2262 struct gdma_queue_spec spec; 2263 struct mana_cq *cq = NULL; 2264 struct gdma_context *gc; 2265 u32 cq_size, rq_size; 2266 struct mana_rxq *rxq; 2267 int err; 2268 2269 gc = gd->gdma_context; 2270 2271 rxq = kzalloc(struct_size(rxq, rx_oobs, apc->rx_queue_size), 2272 GFP_KERNEL); 2273 if (!rxq) 2274 return NULL; 2275 2276 rxq->ndev = ndev; 2277 rxq->num_rx_buf = apc->rx_queue_size; 2278 rxq->rxq_idx = rxq_idx; 2279 rxq->rxobj = INVALID_MANA_HANDLE; 2280 2281 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2282 &rxq->headroom); 2283 2284 /* Create page pool for RX queue */ 2285 err = mana_create_page_pool(rxq, gc); 2286 if (err) { 2287 netdev_err(ndev, "Create page pool err:%d\n", err); 2288 goto out; 2289 } 2290 2291 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2292 if (err) 2293 goto out; 2294 2295 rq_size = MANA_PAGE_ALIGN(rq_size); 2296 cq_size = MANA_PAGE_ALIGN(cq_size); 2297 2298 /* Create RQ */ 2299 memset(&spec, 0, sizeof(spec)); 2300 spec.type = GDMA_RQ; 2301 spec.monitor_avl_buf = true; 2302 spec.queue_size = rq_size; 2303 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2304 if (err) 2305 goto out; 2306 2307 /* Create RQ's CQ */ 2308 cq = &rxq->rx_cq; 2309 cq->type = MANA_CQ_TYPE_RX; 2310 cq->rxq = rxq; 2311 2312 memset(&spec, 0, sizeof(spec)); 2313 spec.type = GDMA_CQ; 2314 spec.monitor_avl_buf = false; 2315 spec.queue_size = cq_size; 2316 spec.cq.callback = mana_schedule_napi; 2317 spec.cq.parent_eq = eq->eq; 2318 spec.cq.context = cq; 2319 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2320 if (err) 2321 goto out; 2322 2323 memset(&wq_spec, 0, sizeof(wq_spec)); 2324 memset(&cq_spec, 0, sizeof(cq_spec)); 2325 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2326 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2327 2328 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2329 cq_spec.queue_size = cq->gdma_cq->queue_size; 2330 cq_spec.modr_ctx_id = 0; 2331 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2332 2333 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2334 &wq_spec, &cq_spec, &rxq->rxobj); 2335 if (err) 2336 goto out; 2337 2338 rxq->gdma_rq->id = wq_spec.queue_index; 2339 cq->gdma_cq->id = cq_spec.queue_index; 2340 2341 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2342 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2343 2344 rxq->gdma_id = rxq->gdma_rq->id; 2345 cq->gdma_id = cq->gdma_cq->id; 2346 2347 err = mana_push_wqe(rxq); 2348 if (err) 2349 goto out; 2350 2351 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2352 err = -EINVAL; 2353 goto out; 2354 } 2355 2356 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2357 2358 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2359 2360 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2361 cq->napi.napi_id)); 2362 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2363 rxq->page_pool)); 2364 2365 napi_enable(&cq->napi); 2366 2367 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2368 out: 2369 if (!err) 2370 return rxq; 2371 2372 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2373 2374 mana_destroy_rxq(apc, rxq, false); 2375 2376 if (cq) 2377 mana_deinit_cq(apc, cq); 2378 2379 return NULL; 2380 } 2381 2382 static void mana_create_rxq_debugfs(struct mana_port_context *apc, int idx) 2383 { 2384 struct mana_rxq *rxq; 2385 char qnum[32]; 2386 2387 rxq = apc->rxqs[idx]; 2388 2389 sprintf(qnum, "RX-%d", idx); 2390 rxq->mana_rx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 2391 debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->head); 2392 debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->tail); 2393 debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->num_rx_buf); 2394 debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs, 2395 &rxq->rx_cq.gdma_cq->head); 2396 debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs, 2397 &rxq->rx_cq.gdma_cq->tail); 2398 debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq->rx_cq.budget); 2399 debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->gdma_rq, &mana_dbg_q_fops); 2400 debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->rx_cq.gdma_cq, 2401 &mana_dbg_q_fops); 2402 } 2403 2404 static int mana_add_rx_queues(struct mana_port_context *apc, 2405 struct net_device *ndev) 2406 { 2407 struct mana_context *ac = apc->ac; 2408 struct mana_rxq *rxq; 2409 int err = 0; 2410 int i; 2411 2412 for (i = 0; i < apc->num_queues; i++) { 2413 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2414 if (!rxq) { 2415 err = -ENOMEM; 2416 netdev_err(ndev, "Failed to create rxq %d : %d\n", i, err); 2417 goto out; 2418 } 2419 2420 u64_stats_init(&rxq->stats.syncp); 2421 2422 apc->rxqs[i] = rxq; 2423 2424 mana_create_rxq_debugfs(apc, i); 2425 } 2426 2427 apc->default_rxobj = apc->rxqs[0]->rxobj; 2428 out: 2429 return err; 2430 } 2431 2432 static void mana_destroy_vport(struct mana_port_context *apc) 2433 { 2434 struct gdma_dev *gd = apc->ac->gdma_dev; 2435 struct mana_rxq *rxq; 2436 u32 rxq_idx; 2437 2438 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2439 rxq = apc->rxqs[rxq_idx]; 2440 if (!rxq) 2441 continue; 2442 2443 mana_destroy_rxq(apc, rxq, true); 2444 apc->rxqs[rxq_idx] = NULL; 2445 } 2446 2447 mana_destroy_txq(apc); 2448 mana_uncfg_vport(apc); 2449 2450 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) 2451 mana_pf_deregister_hw_vport(apc); 2452 } 2453 2454 static int mana_create_vport(struct mana_port_context *apc, 2455 struct net_device *net) 2456 { 2457 struct gdma_dev *gd = apc->ac->gdma_dev; 2458 int err; 2459 2460 apc->default_rxobj = INVALID_MANA_HANDLE; 2461 2462 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) { 2463 err = mana_pf_register_hw_vport(apc); 2464 if (err) 2465 return err; 2466 } 2467 2468 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2469 if (err) 2470 return err; 2471 2472 return mana_create_txq(apc, net); 2473 } 2474 2475 static int mana_rss_table_alloc(struct mana_port_context *apc) 2476 { 2477 if (!apc->indir_table_sz) { 2478 netdev_err(apc->ndev, 2479 "Indirection table size not set for vPort %d\n", 2480 apc->port_idx); 2481 return -EINVAL; 2482 } 2483 2484 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL); 2485 if (!apc->indir_table) 2486 return -ENOMEM; 2487 2488 apc->rxobj_table = kcalloc(apc->indir_table_sz, sizeof(mana_handle_t), GFP_KERNEL); 2489 if (!apc->rxobj_table) { 2490 kfree(apc->indir_table); 2491 return -ENOMEM; 2492 } 2493 2494 return 0; 2495 } 2496 2497 static void mana_rss_table_init(struct mana_port_context *apc) 2498 { 2499 int i; 2500 2501 for (i = 0; i < apc->indir_table_sz; i++) 2502 apc->indir_table[i] = 2503 ethtool_rxfh_indir_default(i, apc->num_queues); 2504 } 2505 2506 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2507 bool update_hash, bool update_tab) 2508 { 2509 u32 queue_idx; 2510 int err; 2511 int i; 2512 2513 if (update_tab) { 2514 for (i = 0; i < apc->indir_table_sz; i++) { 2515 queue_idx = apc->indir_table[i]; 2516 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2517 } 2518 } 2519 2520 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2521 if (err) 2522 return err; 2523 2524 mana_fence_rqs(apc); 2525 2526 return 0; 2527 } 2528 2529 void mana_query_gf_stats(struct mana_port_context *apc) 2530 { 2531 struct mana_query_gf_stat_resp resp = {}; 2532 struct mana_query_gf_stat_req req = {}; 2533 struct net_device *ndev = apc->ndev; 2534 int err; 2535 2536 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2537 sizeof(req), sizeof(resp)); 2538 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 2539 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE | 2540 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED | 2541 STATISTICS_FLAGS_HC_RX_BYTES | 2542 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS | 2543 STATISTICS_FLAGS_HC_RX_UCAST_BYTES | 2544 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS | 2545 STATISTICS_FLAGS_HC_RX_MCAST_BYTES | 2546 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS | 2547 STATISTICS_FLAGS_HC_RX_BCAST_BYTES | 2548 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED | 2549 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED | 2550 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS | 2551 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT | 2552 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT | 2553 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT | 2554 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT | 2555 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT | 2556 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION | 2557 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB | 2558 STATISTICS_FLAGS_HC_TX_BYTES | 2559 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2560 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2561 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2562 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2563 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2564 STATISTICS_FLAGS_HC_TX_BCAST_BYTES | 2565 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR; 2566 2567 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 2568 sizeof(resp)); 2569 if (err) { 2570 netdev_err(ndev, "Failed to query GF stats: %d\n", err); 2571 return; 2572 } 2573 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2574 sizeof(resp)); 2575 if (err || resp.hdr.status) { 2576 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err, 2577 resp.hdr.status); 2578 return; 2579 } 2580 2581 apc->eth_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe; 2582 apc->eth_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled; 2583 apc->eth_stats.hc_rx_bytes = resp.hc_rx_bytes; 2584 apc->eth_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts; 2585 apc->eth_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes; 2586 apc->eth_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts; 2587 apc->eth_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes; 2588 apc->eth_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts; 2589 apc->eth_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes; 2590 apc->eth_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled; 2591 apc->eth_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled; 2592 apc->eth_stats.hc_tx_err_inval_vportoffset_pkt = 2593 resp.tx_err_inval_vport_offset_pkt; 2594 apc->eth_stats.hc_tx_err_vlan_enforcement = 2595 resp.tx_err_vlan_enforcement; 2596 apc->eth_stats.hc_tx_err_eth_type_enforcement = 2597 resp.tx_err_ethtype_enforcement; 2598 apc->eth_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement; 2599 apc->eth_stats.hc_tx_err_sqpdid_enforcement = 2600 resp.tx_err_SQPDID_enforcement; 2601 apc->eth_stats.hc_tx_err_cqpdid_enforcement = 2602 resp.tx_err_CQPDID_enforcement; 2603 apc->eth_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation; 2604 apc->eth_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob; 2605 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes; 2606 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2607 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2608 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2609 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2610 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2611 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2612 apc->eth_stats.hc_tx_err_gdma = resp.tx_err_gdma; 2613 } 2614 2615 static int mana_init_port(struct net_device *ndev) 2616 { 2617 struct mana_port_context *apc = netdev_priv(ndev); 2618 struct gdma_dev *gd = apc->ac->gdma_dev; 2619 u32 max_txq, max_rxq, max_queues; 2620 int port_idx = apc->port_idx; 2621 struct gdma_context *gc; 2622 char vport[32]; 2623 int err; 2624 2625 err = mana_init_port_context(apc); 2626 if (err) 2627 return err; 2628 2629 gc = gd->gdma_context; 2630 2631 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2632 &apc->indir_table_sz); 2633 if (err) { 2634 netdev_err(ndev, "Failed to query info for vPort %d\n", 2635 port_idx); 2636 goto reset_apc; 2637 } 2638 2639 max_queues = min_t(u32, max_txq, max_rxq); 2640 if (apc->max_queues > max_queues) 2641 apc->max_queues = max_queues; 2642 2643 if (apc->num_queues > apc->max_queues) 2644 apc->num_queues = apc->max_queues; 2645 2646 eth_hw_addr_set(ndev, apc->mac_addr); 2647 sprintf(vport, "vport%d", port_idx); 2648 apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs); 2649 return 0; 2650 2651 reset_apc: 2652 mana_cleanup_port_context(apc); 2653 return err; 2654 } 2655 2656 int mana_alloc_queues(struct net_device *ndev) 2657 { 2658 struct mana_port_context *apc = netdev_priv(ndev); 2659 struct gdma_dev *gd = apc->ac->gdma_dev; 2660 int err; 2661 2662 err = mana_create_vport(apc, ndev); 2663 if (err) { 2664 netdev_err(ndev, "Failed to create vPort %u : %d\n", apc->port_idx, err); 2665 return err; 2666 } 2667 2668 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2669 if (err) { 2670 netdev_err(ndev, 2671 "netif_set_real_num_tx_queues () failed for ndev with num_queues %u : %d\n", 2672 apc->num_queues, err); 2673 goto destroy_vport; 2674 } 2675 2676 err = mana_add_rx_queues(apc, ndev); 2677 if (err) 2678 goto destroy_vport; 2679 2680 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2681 2682 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2683 if (err) { 2684 netdev_err(ndev, 2685 "netif_set_real_num_rx_queues () failed for ndev with num_queues %u : %d\n", 2686 apc->num_queues, err); 2687 goto destroy_vport; 2688 } 2689 2690 mana_rss_table_init(apc); 2691 2692 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2693 if (err) { 2694 netdev_err(ndev, "Failed to configure RSS table: %d\n", err); 2695 goto destroy_vport; 2696 } 2697 2698 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) { 2699 err = mana_pf_register_filter(apc); 2700 if (err) 2701 goto destroy_vport; 2702 } 2703 2704 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2705 2706 return 0; 2707 2708 destroy_vport: 2709 mana_destroy_vport(apc); 2710 return err; 2711 } 2712 2713 int mana_attach(struct net_device *ndev) 2714 { 2715 struct mana_port_context *apc = netdev_priv(ndev); 2716 int err; 2717 2718 ASSERT_RTNL(); 2719 2720 err = mana_init_port(ndev); 2721 if (err) 2722 return err; 2723 2724 if (apc->port_st_save) { 2725 err = mana_alloc_queues(ndev); 2726 if (err) { 2727 mana_cleanup_port_context(apc); 2728 return err; 2729 } 2730 } 2731 2732 apc->port_is_up = apc->port_st_save; 2733 2734 /* Ensure port state updated before txq state */ 2735 smp_wmb(); 2736 2737 if (apc->port_is_up) 2738 netif_carrier_on(ndev); 2739 2740 netif_device_attach(ndev); 2741 2742 return 0; 2743 } 2744 2745 static int mana_dealloc_queues(struct net_device *ndev) 2746 { 2747 struct mana_port_context *apc = netdev_priv(ndev); 2748 unsigned long timeout = jiffies + 120 * HZ; 2749 struct gdma_dev *gd = apc->ac->gdma_dev; 2750 struct mana_txq *txq; 2751 struct sk_buff *skb; 2752 int i, err; 2753 u32 tsleep; 2754 2755 if (apc->port_is_up) 2756 return -EINVAL; 2757 2758 mana_chn_setxdp(apc, NULL); 2759 2760 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) 2761 mana_pf_deregister_filter(apc); 2762 2763 /* No packet can be transmitted now since apc->port_is_up is false. 2764 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2765 * a txq because it may not timely see apc->port_is_up being cleared 2766 * to false, but it doesn't matter since mana_start_xmit() drops any 2767 * new packets due to apc->port_is_up being false. 2768 * 2769 * Drain all the in-flight TX packets. 2770 * A timeout of 120 seconds for all the queues is used. 2771 * This will break the while loop when h/w is not responding. 2772 * This value of 120 has been decided here considering max 2773 * number of queues. 2774 */ 2775 2776 for (i = 0; i < apc->num_queues; i++) { 2777 txq = &apc->tx_qp[i].txq; 2778 tsleep = 1000; 2779 while (atomic_read(&txq->pending_sends) > 0 && 2780 time_before(jiffies, timeout)) { 2781 usleep_range(tsleep, tsleep + 1000); 2782 tsleep <<= 1; 2783 } 2784 if (atomic_read(&txq->pending_sends)) { 2785 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 2786 if (err) { 2787 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 2788 err, atomic_read(&txq->pending_sends), 2789 txq->gdma_txq_id); 2790 } 2791 break; 2792 } 2793 } 2794 2795 for (i = 0; i < apc->num_queues; i++) { 2796 txq = &apc->tx_qp[i].txq; 2797 while ((skb = skb_dequeue(&txq->pending_skbs))) { 2798 mana_unmap_skb(skb, apc); 2799 dev_kfree_skb_any(skb); 2800 } 2801 atomic_set(&txq->pending_sends, 0); 2802 } 2803 /* We're 100% sure the queues can no longer be woken up, because 2804 * we're sure now mana_poll_tx_cq() can't be running. 2805 */ 2806 2807 apc->rss_state = TRI_STATE_FALSE; 2808 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2809 if (err) { 2810 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2811 return err; 2812 } 2813 2814 mana_destroy_vport(apc); 2815 2816 return 0; 2817 } 2818 2819 int mana_detach(struct net_device *ndev, bool from_close) 2820 { 2821 struct mana_port_context *apc = netdev_priv(ndev); 2822 int err; 2823 2824 ASSERT_RTNL(); 2825 2826 apc->port_st_save = apc->port_is_up; 2827 apc->port_is_up = false; 2828 2829 /* Ensure port state updated before txq state */ 2830 smp_wmb(); 2831 2832 netif_tx_disable(ndev); 2833 netif_carrier_off(ndev); 2834 2835 if (apc->port_st_save) { 2836 err = mana_dealloc_queues(ndev); 2837 if (err) { 2838 netdev_err(ndev, "%s failed to deallocate queues: %d\n", __func__, err); 2839 return err; 2840 } 2841 } 2842 2843 if (!from_close) { 2844 netif_device_detach(ndev); 2845 mana_cleanup_port_context(apc); 2846 } 2847 2848 return 0; 2849 } 2850 2851 static int mana_probe_port(struct mana_context *ac, int port_idx, 2852 struct net_device **ndev_storage) 2853 { 2854 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2855 struct mana_port_context *apc; 2856 struct net_device *ndev; 2857 int err; 2858 2859 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2860 gc->max_num_queues); 2861 if (!ndev) 2862 return -ENOMEM; 2863 2864 *ndev_storage = ndev; 2865 2866 apc = netdev_priv(ndev); 2867 apc->ac = ac; 2868 apc->ndev = ndev; 2869 apc->max_queues = gc->max_num_queues; 2870 apc->num_queues = gc->max_num_queues; 2871 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE; 2872 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE; 2873 apc->port_handle = INVALID_MANA_HANDLE; 2874 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2875 apc->port_idx = port_idx; 2876 2877 mutex_init(&apc->vport_mutex); 2878 apc->vport_use_count = 0; 2879 2880 ndev->netdev_ops = &mana_devops; 2881 ndev->ethtool_ops = &mana_ethtool_ops; 2882 ndev->mtu = ETH_DATA_LEN; 2883 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2884 ndev->min_mtu = ETH_MIN_MTU; 2885 ndev->needed_headroom = MANA_HEADROOM; 2886 ndev->dev_port = port_idx; 2887 SET_NETDEV_DEV(ndev, gc->dev); 2888 2889 netif_set_tso_max_size(ndev, GSO_MAX_SIZE); 2890 2891 netif_carrier_off(ndev); 2892 2893 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2894 2895 err = mana_init_port(ndev); 2896 if (err) 2897 goto free_net; 2898 2899 err = mana_rss_table_alloc(apc); 2900 if (err) 2901 goto reset_apc; 2902 2903 netdev_lockdep_set_classes(ndev); 2904 2905 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2906 ndev->hw_features |= NETIF_F_RXCSUM; 2907 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2908 ndev->hw_features |= NETIF_F_RXHASH; 2909 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2910 NETIF_F_HW_VLAN_CTAG_RX; 2911 ndev->vlan_features = ndev->features; 2912 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 2913 NETDEV_XDP_ACT_REDIRECT | 2914 NETDEV_XDP_ACT_NDO_XMIT); 2915 2916 err = register_netdev(ndev); 2917 if (err) { 2918 netdev_err(ndev, "Unable to register netdev.\n"); 2919 goto free_indir; 2920 } 2921 2922 return 0; 2923 2924 free_indir: 2925 mana_cleanup_indir_table(apc); 2926 reset_apc: 2927 mana_cleanup_port_context(apc); 2928 free_net: 2929 *ndev_storage = NULL; 2930 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2931 free_netdev(ndev); 2932 return err; 2933 } 2934 2935 static void adev_release(struct device *dev) 2936 { 2937 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2938 2939 kfree(madev); 2940 } 2941 2942 static void remove_adev(struct gdma_dev *gd) 2943 { 2944 struct auxiliary_device *adev = gd->adev; 2945 int id = adev->id; 2946 2947 auxiliary_device_delete(adev); 2948 auxiliary_device_uninit(adev); 2949 2950 mana_adev_idx_free(id); 2951 gd->adev = NULL; 2952 } 2953 2954 static int add_adev(struct gdma_dev *gd, const char *name) 2955 { 2956 struct auxiliary_device *adev; 2957 struct mana_adev *madev; 2958 int ret; 2959 2960 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2961 if (!madev) 2962 return -ENOMEM; 2963 2964 adev = &madev->adev; 2965 ret = mana_adev_idx_alloc(); 2966 if (ret < 0) 2967 goto idx_fail; 2968 adev->id = ret; 2969 2970 adev->name = name; 2971 adev->dev.parent = gd->gdma_context->dev; 2972 adev->dev.release = adev_release; 2973 madev->mdev = gd; 2974 2975 ret = auxiliary_device_init(adev); 2976 if (ret) 2977 goto init_fail; 2978 2979 /* madev is owned by the auxiliary device */ 2980 madev = NULL; 2981 ret = auxiliary_device_add(adev); 2982 if (ret) 2983 goto add_fail; 2984 2985 gd->adev = adev; 2986 dev_dbg(gd->gdma_context->dev, 2987 "Auxiliary device added successfully\n"); 2988 return 0; 2989 2990 add_fail: 2991 auxiliary_device_uninit(adev); 2992 2993 init_fail: 2994 mana_adev_idx_free(adev->id); 2995 2996 idx_fail: 2997 kfree(madev); 2998 2999 return ret; 3000 } 3001 3002 static void mana_rdma_service_handle(struct work_struct *work) 3003 { 3004 struct mana_service_work *serv_work = 3005 container_of(work, struct mana_service_work, work); 3006 struct gdma_dev *gd = serv_work->gdma_dev; 3007 struct device *dev = gd->gdma_context->dev; 3008 int ret; 3009 3010 if (READ_ONCE(gd->rdma_teardown)) 3011 goto out; 3012 3013 switch (serv_work->event) { 3014 case GDMA_SERVICE_TYPE_RDMA_SUSPEND: 3015 if (!gd->adev || gd->is_suspended) 3016 break; 3017 3018 remove_adev(gd); 3019 gd->is_suspended = true; 3020 break; 3021 3022 case GDMA_SERVICE_TYPE_RDMA_RESUME: 3023 if (!gd->is_suspended) 3024 break; 3025 3026 ret = add_adev(gd, "rdma"); 3027 if (ret) 3028 dev_err(dev, "Failed to add adev on resume: %d\n", ret); 3029 else 3030 gd->is_suspended = false; 3031 break; 3032 3033 default: 3034 dev_warn(dev, "unknown adev service event %u\n", 3035 serv_work->event); 3036 break; 3037 } 3038 3039 out: 3040 kfree(serv_work); 3041 } 3042 3043 int mana_rdma_service_event(struct gdma_context *gc, enum gdma_service_type event) 3044 { 3045 struct gdma_dev *gd = &gc->mana_ib; 3046 struct mana_service_work *serv_work; 3047 3048 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3049 /* RDMA device is not detected on pci */ 3050 return 0; 3051 } 3052 3053 serv_work = kzalloc(sizeof(*serv_work), GFP_ATOMIC); 3054 if (!serv_work) 3055 return -ENOMEM; 3056 3057 serv_work->event = event; 3058 serv_work->gdma_dev = gd; 3059 3060 INIT_WORK(&serv_work->work, mana_rdma_service_handle); 3061 queue_work(gc->service_wq, &serv_work->work); 3062 3063 return 0; 3064 } 3065 3066 int mana_probe(struct gdma_dev *gd, bool resuming) 3067 { 3068 struct gdma_context *gc = gd->gdma_context; 3069 struct mana_context *ac = gd->driver_data; 3070 struct device *dev = gc->dev; 3071 u8 bm_hostmode = 0; 3072 u16 num_ports = 0; 3073 int err; 3074 int i; 3075 3076 dev_info(dev, 3077 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 3078 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 3079 3080 err = mana_gd_register_device(gd); 3081 if (err) 3082 return err; 3083 3084 if (!resuming) { 3085 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 3086 if (!ac) 3087 return -ENOMEM; 3088 3089 ac->gdma_dev = gd; 3090 gd->driver_data = ac; 3091 } 3092 3093 err = mana_create_eq(ac); 3094 if (err) { 3095 dev_err(dev, "Failed to create EQs: %d\n", err); 3096 goto out; 3097 } 3098 3099 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 3100 MANA_MICRO_VERSION, &num_ports, &bm_hostmode); 3101 if (err) 3102 goto out; 3103 3104 ac->bm_hostmode = bm_hostmode; 3105 3106 if (!resuming) { 3107 ac->num_ports = num_ports; 3108 } else { 3109 if (ac->num_ports != num_ports) { 3110 dev_err(dev, "The number of vPorts changed: %d->%d\n", 3111 ac->num_ports, num_ports); 3112 err = -EPROTO; 3113 goto out; 3114 } 3115 } 3116 3117 if (ac->num_ports == 0) 3118 dev_err(dev, "Failed to detect any vPort\n"); 3119 3120 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 3121 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 3122 3123 if (!resuming) { 3124 for (i = 0; i < ac->num_ports; i++) { 3125 err = mana_probe_port(ac, i, &ac->ports[i]); 3126 /* we log the port for which the probe failed and stop 3127 * probes for subsequent ports. 3128 * Note that we keep running ports, for which the probes 3129 * were successful, unless add_adev fails too 3130 */ 3131 if (err) { 3132 dev_err(dev, "Probe Failed for port %d\n", i); 3133 break; 3134 } 3135 } 3136 } else { 3137 for (i = 0; i < ac->num_ports; i++) { 3138 rtnl_lock(); 3139 err = mana_attach(ac->ports[i]); 3140 rtnl_unlock(); 3141 /* we log the port for which the attach failed and stop 3142 * attach for subsequent ports 3143 * Note that we keep running ports, for which the attach 3144 * were successful, unless add_adev fails too 3145 */ 3146 if (err) { 3147 dev_err(dev, "Attach Failed for port %d\n", i); 3148 break; 3149 } 3150 } 3151 } 3152 3153 err = add_adev(gd, "eth"); 3154 out: 3155 if (err) { 3156 mana_remove(gd, false); 3157 } else { 3158 dev_dbg(dev, "gd=%p, id=%u, num_ports=%d, type=%u, instance=%u\n", 3159 gd, gd->dev_id.as_uint32, ac->num_ports, 3160 gd->dev_id.type, gd->dev_id.instance); 3161 dev_dbg(dev, "%s succeeded\n", __func__); 3162 } 3163 3164 return err; 3165 } 3166 3167 void mana_remove(struct gdma_dev *gd, bool suspending) 3168 { 3169 struct gdma_context *gc = gd->gdma_context; 3170 struct mana_context *ac = gd->driver_data; 3171 struct mana_port_context *apc; 3172 struct device *dev = gc->dev; 3173 struct net_device *ndev; 3174 int err; 3175 int i; 3176 3177 /* adev currently doesn't support suspending, always remove it */ 3178 if (gd->adev) 3179 remove_adev(gd); 3180 3181 for (i = 0; i < ac->num_ports; i++) { 3182 ndev = ac->ports[i]; 3183 apc = netdev_priv(ndev); 3184 if (!ndev) { 3185 if (i == 0) 3186 dev_err(dev, "No net device to remove\n"); 3187 goto out; 3188 } 3189 3190 /* All cleanup actions should stay after rtnl_lock(), otherwise 3191 * other functions may access partially cleaned up data. 3192 */ 3193 rtnl_lock(); 3194 3195 err = mana_detach(ndev, false); 3196 if (err) 3197 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 3198 i, err); 3199 3200 if (suspending) { 3201 /* No need to unregister the ndev. */ 3202 rtnl_unlock(); 3203 continue; 3204 } 3205 3206 unregister_netdevice(ndev); 3207 mana_cleanup_indir_table(apc); 3208 3209 rtnl_unlock(); 3210 3211 free_netdev(ndev); 3212 } 3213 3214 mana_destroy_eq(ac); 3215 out: 3216 mana_gd_deregister_device(gd); 3217 3218 if (suspending) 3219 return; 3220 3221 gd->driver_data = NULL; 3222 gd->gdma_context = NULL; 3223 kfree(ac); 3224 dev_dbg(dev, "%s succeeded\n", __func__); 3225 } 3226 3227 int mana_rdma_probe(struct gdma_dev *gd) 3228 { 3229 int err = 0; 3230 3231 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3232 /* RDMA device is not detected on pci */ 3233 return err; 3234 } 3235 3236 err = mana_gd_register_device(gd); 3237 if (err) 3238 return err; 3239 3240 err = add_adev(gd, "rdma"); 3241 if (err) 3242 mana_gd_deregister_device(gd); 3243 3244 return err; 3245 } 3246 3247 void mana_rdma_remove(struct gdma_dev *gd) 3248 { 3249 struct gdma_context *gc = gd->gdma_context; 3250 3251 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) { 3252 /* RDMA device is not detected on pci */ 3253 return; 3254 } 3255 3256 WRITE_ONCE(gd->rdma_teardown, true); 3257 flush_workqueue(gc->service_wq); 3258 3259 if (gd->adev) 3260 remove_adev(gd); 3261 3262 mana_gd_deregister_device(gd); 3263 } 3264 3265 struct net_device *mana_get_primary_netdev(struct mana_context *ac, 3266 u32 port_index, 3267 netdevice_tracker *tracker) 3268 { 3269 struct net_device *ndev; 3270 3271 if (port_index >= ac->num_ports) 3272 return NULL; 3273 3274 rcu_read_lock(); 3275 3276 /* If mana is used in netvsc, the upper netdevice should be returned. */ 3277 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]); 3278 3279 /* If there is no upper device, use the parent Ethernet device */ 3280 if (!ndev) 3281 ndev = ac->ports[port_index]; 3282 3283 netdev_hold(ndev, tracker, GFP_ATOMIC); 3284 rcu_read_unlock(); 3285 3286 return ndev; 3287 } 3288 EXPORT_SYMBOL_NS(mana_get_primary_netdev, "NET_MANA"); 3289