1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* Copyright (c) 2021, Microsoft Corporation. */ 3 4 #include <uapi/linux/bpf.h> 5 6 #include <linux/inetdevice.h> 7 #include <linux/etherdevice.h> 8 #include <linux/ethtool.h> 9 #include <linux/filter.h> 10 #include <linux/mm.h> 11 #include <linux/pci.h> 12 13 #include <net/checksum.h> 14 #include <net/ip6_checksum.h> 15 #include <net/page_pool/helpers.h> 16 #include <net/xdp.h> 17 18 #include <net/mana/mana.h> 19 #include <net/mana/mana_auxiliary.h> 20 21 static DEFINE_IDA(mana_adev_ida); 22 23 static int mana_adev_idx_alloc(void) 24 { 25 return ida_alloc(&mana_adev_ida, GFP_KERNEL); 26 } 27 28 static void mana_adev_idx_free(int idx) 29 { 30 ida_free(&mana_adev_ida, idx); 31 } 32 33 /* Microsoft Azure Network Adapter (MANA) functions */ 34 35 static int mana_open(struct net_device *ndev) 36 { 37 struct mana_port_context *apc = netdev_priv(ndev); 38 int err; 39 40 err = mana_alloc_queues(ndev); 41 if (err) 42 return err; 43 44 apc->port_is_up = true; 45 46 /* Ensure port state updated before txq state */ 47 smp_wmb(); 48 49 netif_carrier_on(ndev); 50 netif_tx_wake_all_queues(ndev); 51 52 return 0; 53 } 54 55 static int mana_close(struct net_device *ndev) 56 { 57 struct mana_port_context *apc = netdev_priv(ndev); 58 59 if (!apc->port_is_up) 60 return 0; 61 62 return mana_detach(ndev, true); 63 } 64 65 static bool mana_can_tx(struct gdma_queue *wq) 66 { 67 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE; 68 } 69 70 static unsigned int mana_checksum_info(struct sk_buff *skb) 71 { 72 if (skb->protocol == htons(ETH_P_IP)) { 73 struct iphdr *ip = ip_hdr(skb); 74 75 if (ip->protocol == IPPROTO_TCP) 76 return IPPROTO_TCP; 77 78 if (ip->protocol == IPPROTO_UDP) 79 return IPPROTO_UDP; 80 } else if (skb->protocol == htons(ETH_P_IPV6)) { 81 struct ipv6hdr *ip6 = ipv6_hdr(skb); 82 83 if (ip6->nexthdr == IPPROTO_TCP) 84 return IPPROTO_TCP; 85 86 if (ip6->nexthdr == IPPROTO_UDP) 87 return IPPROTO_UDP; 88 } 89 90 /* No csum offloading */ 91 return 0; 92 } 93 94 static void mana_add_sge(struct mana_tx_package *tp, struct mana_skb_head *ash, 95 int sg_i, dma_addr_t da, int sge_len, u32 gpa_mkey) 96 { 97 ash->dma_handle[sg_i] = da; 98 ash->size[sg_i] = sge_len; 99 100 tp->wqe_req.sgl[sg_i].address = da; 101 tp->wqe_req.sgl[sg_i].mem_key = gpa_mkey; 102 tp->wqe_req.sgl[sg_i].size = sge_len; 103 } 104 105 static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc, 106 struct mana_tx_package *tp, int gso_hs) 107 { 108 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 109 int hsg = 1; /* num of SGEs of linear part */ 110 struct gdma_dev *gd = apc->ac->gdma_dev; 111 int skb_hlen = skb_headlen(skb); 112 int sge0_len, sge1_len = 0; 113 struct gdma_context *gc; 114 struct device *dev; 115 skb_frag_t *frag; 116 dma_addr_t da; 117 int sg_i; 118 int i; 119 120 gc = gd->gdma_context; 121 dev = gc->dev; 122 123 if (gso_hs && gso_hs < skb_hlen) { 124 sge0_len = gso_hs; 125 sge1_len = skb_hlen - gso_hs; 126 } else { 127 sge0_len = skb_hlen; 128 } 129 130 da = dma_map_single(dev, skb->data, sge0_len, DMA_TO_DEVICE); 131 if (dma_mapping_error(dev, da)) 132 return -ENOMEM; 133 134 mana_add_sge(tp, ash, 0, da, sge0_len, gd->gpa_mkey); 135 136 if (sge1_len) { 137 sg_i = 1; 138 da = dma_map_single(dev, skb->data + sge0_len, sge1_len, 139 DMA_TO_DEVICE); 140 if (dma_mapping_error(dev, da)) 141 goto frag_err; 142 143 mana_add_sge(tp, ash, sg_i, da, sge1_len, gd->gpa_mkey); 144 hsg = 2; 145 } 146 147 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 148 sg_i = hsg + i; 149 150 frag = &skb_shinfo(skb)->frags[i]; 151 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 152 DMA_TO_DEVICE); 153 if (dma_mapping_error(dev, da)) 154 goto frag_err; 155 156 mana_add_sge(tp, ash, sg_i, da, skb_frag_size(frag), 157 gd->gpa_mkey); 158 } 159 160 return 0; 161 162 frag_err: 163 for (i = sg_i - 1; i >= hsg; i--) 164 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 165 DMA_TO_DEVICE); 166 167 for (i = hsg - 1; i >= 0; i--) 168 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 169 DMA_TO_DEVICE); 170 171 return -ENOMEM; 172 } 173 174 /* Handle the case when GSO SKB linear length is too large. 175 * MANA NIC requires GSO packets to put only the packet header to SGE0. 176 * So, we need 2 SGEs for the skb linear part which contains more than the 177 * header. 178 * Return a positive value for the number of SGEs, or a negative value 179 * for an error. 180 */ 181 static int mana_fix_skb_head(struct net_device *ndev, struct sk_buff *skb, 182 int gso_hs) 183 { 184 int num_sge = 1 + skb_shinfo(skb)->nr_frags; 185 int skb_hlen = skb_headlen(skb); 186 187 if (gso_hs < skb_hlen) { 188 num_sge++; 189 } else if (gso_hs > skb_hlen) { 190 if (net_ratelimit()) 191 netdev_err(ndev, 192 "TX nonlinear head: hs:%d, skb_hlen:%d\n", 193 gso_hs, skb_hlen); 194 195 return -EINVAL; 196 } 197 198 return num_sge; 199 } 200 201 /* Get the GSO packet's header size */ 202 static int mana_get_gso_hs(struct sk_buff *skb) 203 { 204 int gso_hs; 205 206 if (skb->encapsulation) { 207 gso_hs = skb_inner_tcp_all_headers(skb); 208 } else { 209 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 210 gso_hs = skb_transport_offset(skb) + 211 sizeof(struct udphdr); 212 } else { 213 gso_hs = skb_tcp_all_headers(skb); 214 } 215 } 216 217 return gso_hs; 218 } 219 220 netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) 221 { 222 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT; 223 struct mana_port_context *apc = netdev_priv(ndev); 224 int gso_hs = 0; /* zero for non-GSO pkts */ 225 u16 txq_idx = skb_get_queue_mapping(skb); 226 struct gdma_dev *gd = apc->ac->gdma_dev; 227 bool ipv4 = false, ipv6 = false; 228 struct mana_tx_package pkg = {}; 229 struct netdev_queue *net_txq; 230 struct mana_stats_tx *tx_stats; 231 struct gdma_queue *gdma_sq; 232 unsigned int csum_type; 233 struct mana_txq *txq; 234 struct mana_cq *cq; 235 int err, len; 236 237 if (unlikely(!apc->port_is_up)) 238 goto tx_drop; 239 240 if (skb_cow_head(skb, MANA_HEADROOM)) 241 goto tx_drop_count; 242 243 txq = &apc->tx_qp[txq_idx].txq; 244 gdma_sq = txq->gdma_sq; 245 cq = &apc->tx_qp[txq_idx].tx_cq; 246 tx_stats = &txq->stats; 247 248 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id; 249 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame; 250 251 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) { 252 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset; 253 pkt_fmt = MANA_LONG_PKT_FMT; 254 } else { 255 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; 256 } 257 258 if (skb_vlan_tag_present(skb)) { 259 pkt_fmt = MANA_LONG_PKT_FMT; 260 pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1; 261 pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb); 262 pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb); 263 pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb); 264 } 265 266 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt; 267 268 if (pkt_fmt == MANA_SHORT_PKT_FMT) { 269 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob); 270 u64_stats_update_begin(&tx_stats->syncp); 271 tx_stats->short_pkt_fmt++; 272 u64_stats_update_end(&tx_stats->syncp); 273 } else { 274 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob); 275 u64_stats_update_begin(&tx_stats->syncp); 276 tx_stats->long_pkt_fmt++; 277 u64_stats_update_end(&tx_stats->syncp); 278 } 279 280 pkg.wqe_req.inline_oob_data = &pkg.tx_oob; 281 pkg.wqe_req.flags = 0; 282 pkg.wqe_req.client_data_unit = 0; 283 284 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; 285 286 if (skb->protocol == htons(ETH_P_IP)) 287 ipv4 = true; 288 else if (skb->protocol == htons(ETH_P_IPV6)) 289 ipv6 = true; 290 291 if (skb_is_gso(skb)) { 292 int num_sge; 293 294 gso_hs = mana_get_gso_hs(skb); 295 296 num_sge = mana_fix_skb_head(ndev, skb, gso_hs); 297 if (num_sge > 0) 298 pkg.wqe_req.num_sge = num_sge; 299 else 300 goto tx_drop_count; 301 302 u64_stats_update_begin(&tx_stats->syncp); 303 if (skb->encapsulation) { 304 tx_stats->tso_inner_packets++; 305 tx_stats->tso_inner_bytes += skb->len - gso_hs; 306 } else { 307 tx_stats->tso_packets++; 308 tx_stats->tso_bytes += skb->len - gso_hs; 309 } 310 u64_stats_update_end(&tx_stats->syncp); 311 312 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 313 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 314 315 pkg.tx_oob.s_oob.comp_iphdr_csum = 1; 316 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 317 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 318 319 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size; 320 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0; 321 if (ipv4) { 322 ip_hdr(skb)->tot_len = 0; 323 ip_hdr(skb)->check = 0; 324 tcp_hdr(skb)->check = 325 ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 326 ip_hdr(skb)->daddr, 0, 327 IPPROTO_TCP, 0); 328 } else { 329 ipv6_hdr(skb)->payload_len = 0; 330 tcp_hdr(skb)->check = 331 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 332 &ipv6_hdr(skb)->daddr, 0, 333 IPPROTO_TCP, 0); 334 } 335 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 336 csum_type = mana_checksum_info(skb); 337 338 u64_stats_update_begin(&tx_stats->syncp); 339 tx_stats->csum_partial++; 340 u64_stats_update_end(&tx_stats->syncp); 341 342 if (csum_type == IPPROTO_TCP) { 343 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 344 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 345 346 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 347 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 348 349 } else if (csum_type == IPPROTO_UDP) { 350 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 351 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 352 353 pkg.tx_oob.s_oob.comp_udp_csum = 1; 354 } else { 355 /* Can't do offload of this type of checksum */ 356 if (skb_checksum_help(skb)) 357 goto tx_drop_count; 358 } 359 } 360 361 WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES); 362 363 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { 364 pkg.wqe_req.sgl = pkg.sgl_array; 365 } else { 366 pkg.sgl_ptr = kmalloc_array(pkg.wqe_req.num_sge, 367 sizeof(struct gdma_sge), 368 GFP_ATOMIC); 369 if (!pkg.sgl_ptr) 370 goto tx_drop_count; 371 372 pkg.wqe_req.sgl = pkg.sgl_ptr; 373 } 374 375 if (mana_map_skb(skb, apc, &pkg, gso_hs)) { 376 u64_stats_update_begin(&tx_stats->syncp); 377 tx_stats->mana_map_err++; 378 u64_stats_update_end(&tx_stats->syncp); 379 goto free_sgl_ptr; 380 } 381 382 skb_queue_tail(&txq->pending_skbs, skb); 383 384 len = skb->len; 385 net_txq = netdev_get_tx_queue(ndev, txq_idx); 386 387 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req, 388 (struct gdma_posted_wqe_info *)skb->cb); 389 if (!mana_can_tx(gdma_sq)) { 390 netif_tx_stop_queue(net_txq); 391 apc->eth_stats.stop_queue++; 392 } 393 394 if (err) { 395 (void)skb_dequeue_tail(&txq->pending_skbs); 396 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err); 397 err = NETDEV_TX_BUSY; 398 goto tx_busy; 399 } 400 401 err = NETDEV_TX_OK; 402 atomic_inc(&txq->pending_sends); 403 404 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq); 405 406 /* skb may be freed after mana_gd_post_work_request. Do not use it. */ 407 skb = NULL; 408 409 tx_stats = &txq->stats; 410 u64_stats_update_begin(&tx_stats->syncp); 411 tx_stats->packets++; 412 tx_stats->bytes += len; 413 u64_stats_update_end(&tx_stats->syncp); 414 415 tx_busy: 416 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) { 417 netif_tx_wake_queue(net_txq); 418 apc->eth_stats.wake_queue++; 419 } 420 421 kfree(pkg.sgl_ptr); 422 return err; 423 424 free_sgl_ptr: 425 kfree(pkg.sgl_ptr); 426 tx_drop_count: 427 ndev->stats.tx_dropped++; 428 tx_drop: 429 dev_kfree_skb_any(skb); 430 return NETDEV_TX_OK; 431 } 432 433 static void mana_get_stats64(struct net_device *ndev, 434 struct rtnl_link_stats64 *st) 435 { 436 struct mana_port_context *apc = netdev_priv(ndev); 437 unsigned int num_queues = apc->num_queues; 438 struct mana_stats_rx *rx_stats; 439 struct mana_stats_tx *tx_stats; 440 unsigned int start; 441 u64 packets, bytes; 442 int q; 443 444 if (!apc->port_is_up) 445 return; 446 447 netdev_stats_to_stats64(st, &ndev->stats); 448 449 for (q = 0; q < num_queues; q++) { 450 rx_stats = &apc->rxqs[q]->stats; 451 452 do { 453 start = u64_stats_fetch_begin(&rx_stats->syncp); 454 packets = rx_stats->packets; 455 bytes = rx_stats->bytes; 456 } while (u64_stats_fetch_retry(&rx_stats->syncp, start)); 457 458 st->rx_packets += packets; 459 st->rx_bytes += bytes; 460 } 461 462 for (q = 0; q < num_queues; q++) { 463 tx_stats = &apc->tx_qp[q].txq.stats; 464 465 do { 466 start = u64_stats_fetch_begin(&tx_stats->syncp); 467 packets = tx_stats->packets; 468 bytes = tx_stats->bytes; 469 } while (u64_stats_fetch_retry(&tx_stats->syncp, start)); 470 471 st->tx_packets += packets; 472 st->tx_bytes += bytes; 473 } 474 } 475 476 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb, 477 int old_q) 478 { 479 struct mana_port_context *apc = netdev_priv(ndev); 480 u32 hash = skb_get_hash(skb); 481 struct sock *sk = skb->sk; 482 int txq; 483 484 txq = apc->indir_table[hash & MANA_INDIRECT_TABLE_MASK]; 485 486 if (txq != old_q && sk && sk_fullsock(sk) && 487 rcu_access_pointer(sk->sk_dst_cache)) 488 sk_tx_queue_set(sk, txq); 489 490 return txq; 491 } 492 493 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb, 494 struct net_device *sb_dev) 495 { 496 int txq; 497 498 if (ndev->real_num_tx_queues == 1) 499 return 0; 500 501 txq = sk_tx_queue_get(skb->sk); 502 503 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) { 504 if (skb_rx_queue_recorded(skb)) 505 txq = skb_get_rx_queue(skb); 506 else 507 txq = mana_get_tx_queue(ndev, skb, txq); 508 } 509 510 return txq; 511 } 512 513 /* Release pre-allocated RX buffers */ 514 static void mana_pre_dealloc_rxbufs(struct mana_port_context *mpc) 515 { 516 struct device *dev; 517 int i; 518 519 dev = mpc->ac->gdma_dev->gdma_context->dev; 520 521 if (!mpc->rxbufs_pre) 522 goto out1; 523 524 if (!mpc->das_pre) 525 goto out2; 526 527 while (mpc->rxbpre_total) { 528 i = --mpc->rxbpre_total; 529 dma_unmap_single(dev, mpc->das_pre[i], mpc->rxbpre_datasize, 530 DMA_FROM_DEVICE); 531 put_page(virt_to_head_page(mpc->rxbufs_pre[i])); 532 } 533 534 kfree(mpc->das_pre); 535 mpc->das_pre = NULL; 536 537 out2: 538 kfree(mpc->rxbufs_pre); 539 mpc->rxbufs_pre = NULL; 540 541 out1: 542 mpc->rxbpre_datasize = 0; 543 mpc->rxbpre_alloc_size = 0; 544 mpc->rxbpre_headroom = 0; 545 } 546 547 /* Get a buffer from the pre-allocated RX buffers */ 548 static void *mana_get_rxbuf_pre(struct mana_rxq *rxq, dma_addr_t *da) 549 { 550 struct net_device *ndev = rxq->ndev; 551 struct mana_port_context *mpc; 552 void *va; 553 554 mpc = netdev_priv(ndev); 555 556 if (!mpc->rxbufs_pre || !mpc->das_pre || !mpc->rxbpre_total) { 557 netdev_err(ndev, "No RX pre-allocated bufs\n"); 558 return NULL; 559 } 560 561 /* Check sizes to catch unexpected coding error */ 562 if (mpc->rxbpre_datasize != rxq->datasize) { 563 netdev_err(ndev, "rxbpre_datasize mismatch: %u: %u\n", 564 mpc->rxbpre_datasize, rxq->datasize); 565 return NULL; 566 } 567 568 if (mpc->rxbpre_alloc_size != rxq->alloc_size) { 569 netdev_err(ndev, "rxbpre_alloc_size mismatch: %u: %u\n", 570 mpc->rxbpre_alloc_size, rxq->alloc_size); 571 return NULL; 572 } 573 574 if (mpc->rxbpre_headroom != rxq->headroom) { 575 netdev_err(ndev, "rxbpre_headroom mismatch: %u: %u\n", 576 mpc->rxbpre_headroom, rxq->headroom); 577 return NULL; 578 } 579 580 mpc->rxbpre_total--; 581 582 *da = mpc->das_pre[mpc->rxbpre_total]; 583 va = mpc->rxbufs_pre[mpc->rxbpre_total]; 584 mpc->rxbufs_pre[mpc->rxbpre_total] = NULL; 585 586 /* Deallocate the array after all buffers are gone */ 587 if (!mpc->rxbpre_total) 588 mana_pre_dealloc_rxbufs(mpc); 589 590 return va; 591 } 592 593 /* Get RX buffer's data size, alloc size, XDP headroom based on MTU */ 594 static void mana_get_rxbuf_cfg(int mtu, u32 *datasize, u32 *alloc_size, 595 u32 *headroom) 596 { 597 if (mtu > MANA_XDP_MTU_MAX) 598 *headroom = 0; /* no support for XDP */ 599 else 600 *headroom = XDP_PACKET_HEADROOM; 601 602 *alloc_size = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD + *headroom); 603 604 /* Using page pool in this case, so alloc_size is PAGE_SIZE */ 605 if (*alloc_size < PAGE_SIZE) 606 *alloc_size = PAGE_SIZE; 607 608 *datasize = mtu + ETH_HLEN; 609 } 610 611 static int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu) 612 { 613 struct device *dev; 614 struct page *page; 615 dma_addr_t da; 616 int num_rxb; 617 void *va; 618 int i; 619 620 mana_get_rxbuf_cfg(new_mtu, &mpc->rxbpre_datasize, 621 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom); 622 623 dev = mpc->ac->gdma_dev->gdma_context->dev; 624 625 num_rxb = mpc->num_queues * RX_BUFFERS_PER_QUEUE; 626 627 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n"); 628 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL); 629 if (!mpc->rxbufs_pre) 630 goto error; 631 632 mpc->das_pre = kmalloc_array(num_rxb, sizeof(dma_addr_t), GFP_KERNEL); 633 if (!mpc->das_pre) 634 goto error; 635 636 mpc->rxbpre_total = 0; 637 638 for (i = 0; i < num_rxb; i++) { 639 if (mpc->rxbpre_alloc_size > PAGE_SIZE) { 640 va = netdev_alloc_frag(mpc->rxbpre_alloc_size); 641 if (!va) 642 goto error; 643 644 page = virt_to_head_page(va); 645 /* Check if the frag falls back to single page */ 646 if (compound_order(page) < 647 get_order(mpc->rxbpre_alloc_size)) { 648 put_page(page); 649 goto error; 650 } 651 } else { 652 page = dev_alloc_page(); 653 if (!page) 654 goto error; 655 656 va = page_to_virt(page); 657 } 658 659 da = dma_map_single(dev, va + mpc->rxbpre_headroom, 660 mpc->rxbpre_datasize, DMA_FROM_DEVICE); 661 if (dma_mapping_error(dev, da)) { 662 put_page(virt_to_head_page(va)); 663 goto error; 664 } 665 666 mpc->rxbufs_pre[i] = va; 667 mpc->das_pre[i] = da; 668 mpc->rxbpre_total = i + 1; 669 } 670 671 return 0; 672 673 error: 674 mana_pre_dealloc_rxbufs(mpc); 675 return -ENOMEM; 676 } 677 678 static int mana_change_mtu(struct net_device *ndev, int new_mtu) 679 { 680 struct mana_port_context *mpc = netdev_priv(ndev); 681 unsigned int old_mtu = ndev->mtu; 682 int err; 683 684 /* Pre-allocate buffers to prevent failure in mana_attach later */ 685 err = mana_pre_alloc_rxbufs(mpc, new_mtu); 686 if (err) { 687 netdev_err(ndev, "Insufficient memory for new MTU\n"); 688 return err; 689 } 690 691 err = mana_detach(ndev, false); 692 if (err) { 693 netdev_err(ndev, "mana_detach failed: %d\n", err); 694 goto out; 695 } 696 697 ndev->mtu = new_mtu; 698 699 err = mana_attach(ndev); 700 if (err) { 701 netdev_err(ndev, "mana_attach failed: %d\n", err); 702 ndev->mtu = old_mtu; 703 } 704 705 out: 706 mana_pre_dealloc_rxbufs(mpc); 707 return err; 708 } 709 710 static const struct net_device_ops mana_devops = { 711 .ndo_open = mana_open, 712 .ndo_stop = mana_close, 713 .ndo_select_queue = mana_select_queue, 714 .ndo_start_xmit = mana_start_xmit, 715 .ndo_validate_addr = eth_validate_addr, 716 .ndo_get_stats64 = mana_get_stats64, 717 .ndo_bpf = mana_bpf, 718 .ndo_xdp_xmit = mana_xdp_xmit, 719 .ndo_change_mtu = mana_change_mtu, 720 }; 721 722 static void mana_cleanup_port_context(struct mana_port_context *apc) 723 { 724 kfree(apc->rxqs); 725 apc->rxqs = NULL; 726 } 727 728 static int mana_init_port_context(struct mana_port_context *apc) 729 { 730 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 731 GFP_KERNEL); 732 733 return !apc->rxqs ? -ENOMEM : 0; 734 } 735 736 static int mana_send_request(struct mana_context *ac, void *in_buf, 737 u32 in_len, void *out_buf, u32 out_len) 738 { 739 struct gdma_context *gc = ac->gdma_dev->gdma_context; 740 struct gdma_resp_hdr *resp = out_buf; 741 struct gdma_req_hdr *req = in_buf; 742 struct device *dev = gc->dev; 743 static atomic_t activity_id; 744 int err; 745 746 req->dev_id = gc->mana.dev_id; 747 req->activity_id = atomic_inc_return(&activity_id); 748 749 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 750 out_buf); 751 if (err || resp->status) { 752 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 753 err, resp->status); 754 return err ? err : -EPROTO; 755 } 756 757 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 758 req->activity_id != resp->activity_id) { 759 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 760 req->dev_id.as_uint32, resp->dev_id.as_uint32, 761 req->activity_id, resp->activity_id); 762 return -EPROTO; 763 } 764 765 return 0; 766 } 767 768 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 769 const enum mana_command_code expected_code, 770 const u32 min_size) 771 { 772 if (resp_hdr->response.msg_type != expected_code) 773 return -EPROTO; 774 775 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 776 return -EPROTO; 777 778 if (resp_hdr->response.msg_size < min_size) 779 return -EPROTO; 780 781 return 0; 782 } 783 784 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 785 { 786 struct mana_register_hw_vport_resp resp = {}; 787 struct mana_register_hw_vport_req req = {}; 788 int err; 789 790 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 791 sizeof(req), sizeof(resp)); 792 req.attached_gfid = 1; 793 req.is_pf_default_vport = 1; 794 req.allow_all_ether_types = 1; 795 796 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 797 sizeof(resp)); 798 if (err) { 799 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 800 return err; 801 } 802 803 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 804 sizeof(resp)); 805 if (err || resp.hdr.status) { 806 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 807 err, resp.hdr.status); 808 return err ? err : -EPROTO; 809 } 810 811 apc->port_handle = resp.hw_vport_handle; 812 return 0; 813 } 814 815 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 816 { 817 struct mana_deregister_hw_vport_resp resp = {}; 818 struct mana_deregister_hw_vport_req req = {}; 819 int err; 820 821 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 822 sizeof(req), sizeof(resp)); 823 req.hw_vport_handle = apc->port_handle; 824 825 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 826 sizeof(resp)); 827 if (err) { 828 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 829 err); 830 return; 831 } 832 833 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 834 sizeof(resp)); 835 if (err || resp.hdr.status) 836 netdev_err(apc->ndev, 837 "Failed to deregister hw vPort: %d, 0x%x\n", 838 err, resp.hdr.status); 839 } 840 841 static int mana_pf_register_filter(struct mana_port_context *apc) 842 { 843 struct mana_register_filter_resp resp = {}; 844 struct mana_register_filter_req req = {}; 845 int err; 846 847 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 848 sizeof(req), sizeof(resp)); 849 req.vport = apc->port_handle; 850 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 851 852 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 853 sizeof(resp)); 854 if (err) { 855 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 856 return err; 857 } 858 859 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 860 sizeof(resp)); 861 if (err || resp.hdr.status) { 862 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 863 err, resp.hdr.status); 864 return err ? err : -EPROTO; 865 } 866 867 apc->pf_filter_handle = resp.filter_handle; 868 return 0; 869 } 870 871 static void mana_pf_deregister_filter(struct mana_port_context *apc) 872 { 873 struct mana_deregister_filter_resp resp = {}; 874 struct mana_deregister_filter_req req = {}; 875 int err; 876 877 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 878 sizeof(req), sizeof(resp)); 879 req.filter_handle = apc->pf_filter_handle; 880 881 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 882 sizeof(resp)); 883 if (err) { 884 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 885 err); 886 return; 887 } 888 889 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 890 sizeof(resp)); 891 if (err || resp.hdr.status) 892 netdev_err(apc->ndev, 893 "Failed to deregister filter: %d, 0x%x\n", 894 err, resp.hdr.status); 895 } 896 897 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 898 u32 proto_minor_ver, u32 proto_micro_ver, 899 u16 *max_num_vports) 900 { 901 struct gdma_context *gc = ac->gdma_dev->gdma_context; 902 struct mana_query_device_cfg_resp resp = {}; 903 struct mana_query_device_cfg_req req = {}; 904 struct device *dev = gc->dev; 905 int err = 0; 906 907 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 908 sizeof(req), sizeof(resp)); 909 910 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 911 912 req.proto_major_ver = proto_major_ver; 913 req.proto_minor_ver = proto_minor_ver; 914 req.proto_micro_ver = proto_micro_ver; 915 916 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 917 if (err) { 918 dev_err(dev, "Failed to query config: %d", err); 919 return err; 920 } 921 922 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 923 sizeof(resp)); 924 if (err || resp.hdr.status) { 925 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 926 resp.hdr.status); 927 if (!err) 928 err = -EPROTO; 929 return err; 930 } 931 932 *max_num_vports = resp.max_num_vports; 933 934 if (resp.hdr.response.msg_version == GDMA_MESSAGE_V2) 935 gc->adapter_mtu = resp.adapter_mtu; 936 else 937 gc->adapter_mtu = ETH_FRAME_LEN; 938 939 return 0; 940 } 941 942 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 943 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 944 { 945 struct mana_query_vport_cfg_resp resp = {}; 946 struct mana_query_vport_cfg_req req = {}; 947 int err; 948 949 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 950 sizeof(req), sizeof(resp)); 951 952 req.vport_index = vport_index; 953 954 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 955 sizeof(resp)); 956 if (err) 957 return err; 958 959 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 960 sizeof(resp)); 961 if (err) 962 return err; 963 964 if (resp.hdr.status) 965 return -EPROTO; 966 967 *max_sq = resp.max_num_sq; 968 *max_rq = resp.max_num_rq; 969 *num_indir_entry = resp.num_indirection_ent; 970 971 apc->port_handle = resp.vport; 972 ether_addr_copy(apc->mac_addr, resp.mac_addr); 973 974 return 0; 975 } 976 977 void mana_uncfg_vport(struct mana_port_context *apc) 978 { 979 mutex_lock(&apc->vport_mutex); 980 apc->vport_use_count--; 981 WARN_ON(apc->vport_use_count < 0); 982 mutex_unlock(&apc->vport_mutex); 983 } 984 EXPORT_SYMBOL_NS(mana_uncfg_vport, NET_MANA); 985 986 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 987 u32 doorbell_pg_id) 988 { 989 struct mana_config_vport_resp resp = {}; 990 struct mana_config_vport_req req = {}; 991 int err; 992 993 /* This function is used to program the Ethernet port in the hardware 994 * table. It can be called from the Ethernet driver or the RDMA driver. 995 * 996 * For Ethernet usage, the hardware supports only one active user on a 997 * physical port. The driver checks on the port usage before programming 998 * the hardware when creating the RAW QP (RDMA driver) or exposing the 999 * device to kernel NET layer (Ethernet driver). 1000 * 1001 * Because the RDMA driver doesn't know in advance which QP type the 1002 * user will create, it exposes the device with all its ports. The user 1003 * may not be able to create RAW QP on a port if this port is already 1004 * in used by the Ethernet driver from the kernel. 1005 * 1006 * This physical port limitation only applies to the RAW QP. For RC QP, 1007 * the hardware doesn't have this limitation. The user can create RC 1008 * QPs on a physical port up to the hardware limits independent of the 1009 * Ethernet usage on the same port. 1010 */ 1011 mutex_lock(&apc->vport_mutex); 1012 if (apc->vport_use_count > 0) { 1013 mutex_unlock(&apc->vport_mutex); 1014 return -EBUSY; 1015 } 1016 apc->vport_use_count++; 1017 mutex_unlock(&apc->vport_mutex); 1018 1019 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1020 sizeof(req), sizeof(resp)); 1021 req.vport = apc->port_handle; 1022 req.pdid = protection_dom_id; 1023 req.doorbell_pageid = doorbell_pg_id; 1024 1025 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1026 sizeof(resp)); 1027 if (err) { 1028 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1029 goto out; 1030 } 1031 1032 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1033 sizeof(resp)); 1034 if (err || resp.hdr.status) { 1035 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1036 err, resp.hdr.status); 1037 if (!err) 1038 err = -EPROTO; 1039 1040 goto out; 1041 } 1042 1043 apc->tx_shortform_allowed = resp.short_form_allowed; 1044 apc->tx_vp_offset = resp.tx_vport_offset; 1045 1046 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 1047 apc->port_handle, protection_dom_id, doorbell_pg_id); 1048 out: 1049 if (err) 1050 mana_uncfg_vport(apc); 1051 1052 return err; 1053 } 1054 EXPORT_SYMBOL_NS(mana_cfg_vport, NET_MANA); 1055 1056 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1057 enum TRI_STATE rx, 1058 bool update_default_rxobj, bool update_key, 1059 bool update_tab) 1060 { 1061 u16 num_entries = MANA_INDIRECT_TABLE_SIZE; 1062 struct mana_cfg_rx_steer_req_v2 *req; 1063 struct mana_cfg_rx_steer_resp resp = {}; 1064 struct net_device *ndev = apc->ndev; 1065 mana_handle_t *req_indir_tab; 1066 u32 req_buf_size; 1067 int err; 1068 1069 req_buf_size = sizeof(*req) + sizeof(mana_handle_t) * num_entries; 1070 req = kzalloc(req_buf_size, GFP_KERNEL); 1071 if (!req) 1072 return -ENOMEM; 1073 1074 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1075 sizeof(resp)); 1076 1077 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1078 1079 req->vport = apc->port_handle; 1080 req->num_indir_entries = num_entries; 1081 req->indir_tab_offset = sizeof(*req); 1082 req->rx_enable = rx; 1083 req->rss_enable = apc->rss_state; 1084 req->update_default_rxobj = update_default_rxobj; 1085 req->update_hashkey = update_key; 1086 req->update_indir_tab = update_tab; 1087 req->default_rxobj = apc->default_rxobj; 1088 req->cqe_coalescing_enable = 0; 1089 1090 if (update_key) 1091 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1092 1093 if (update_tab) { 1094 req_indir_tab = (mana_handle_t *)(req + 1); 1095 memcpy(req_indir_tab, apc->rxobj_table, 1096 req->num_indir_entries * sizeof(mana_handle_t)); 1097 } 1098 1099 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1100 sizeof(resp)); 1101 if (err) { 1102 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1103 goto out; 1104 } 1105 1106 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1107 sizeof(resp)); 1108 if (err) { 1109 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1110 goto out; 1111 } 1112 1113 if (resp.hdr.status) { 1114 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1115 resp.hdr.status); 1116 err = -EPROTO; 1117 } 1118 1119 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1120 apc->port_handle, num_entries); 1121 out: 1122 kfree(req); 1123 return err; 1124 } 1125 1126 int mana_create_wq_obj(struct mana_port_context *apc, 1127 mana_handle_t vport, 1128 u32 wq_type, struct mana_obj_spec *wq_spec, 1129 struct mana_obj_spec *cq_spec, 1130 mana_handle_t *wq_obj) 1131 { 1132 struct mana_create_wqobj_resp resp = {}; 1133 struct mana_create_wqobj_req req = {}; 1134 struct net_device *ndev = apc->ndev; 1135 int err; 1136 1137 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1138 sizeof(req), sizeof(resp)); 1139 req.vport = vport; 1140 req.wq_type = wq_type; 1141 req.wq_gdma_region = wq_spec->gdma_region; 1142 req.cq_gdma_region = cq_spec->gdma_region; 1143 req.wq_size = wq_spec->queue_size; 1144 req.cq_size = cq_spec->queue_size; 1145 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1146 req.cq_parent_qid = cq_spec->attached_eq; 1147 1148 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1149 sizeof(resp)); 1150 if (err) { 1151 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1152 goto out; 1153 } 1154 1155 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1156 sizeof(resp)); 1157 if (err || resp.hdr.status) { 1158 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1159 resp.hdr.status); 1160 if (!err) 1161 err = -EPROTO; 1162 goto out; 1163 } 1164 1165 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1166 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1167 err = -EPROTO; 1168 goto out; 1169 } 1170 1171 *wq_obj = resp.wq_obj; 1172 wq_spec->queue_index = resp.wq_id; 1173 cq_spec->queue_index = resp.cq_id; 1174 1175 return 0; 1176 out: 1177 return err; 1178 } 1179 EXPORT_SYMBOL_NS(mana_create_wq_obj, NET_MANA); 1180 1181 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1182 mana_handle_t wq_obj) 1183 { 1184 struct mana_destroy_wqobj_resp resp = {}; 1185 struct mana_destroy_wqobj_req req = {}; 1186 struct net_device *ndev = apc->ndev; 1187 int err; 1188 1189 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1190 sizeof(req), sizeof(resp)); 1191 req.wq_type = wq_type; 1192 req.wq_obj_handle = wq_obj; 1193 1194 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1195 sizeof(resp)); 1196 if (err) { 1197 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1198 return; 1199 } 1200 1201 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1202 sizeof(resp)); 1203 if (err || resp.hdr.status) 1204 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1205 resp.hdr.status); 1206 } 1207 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, NET_MANA); 1208 1209 static void mana_destroy_eq(struct mana_context *ac) 1210 { 1211 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1212 struct gdma_queue *eq; 1213 int i; 1214 1215 if (!ac->eqs) 1216 return; 1217 1218 for (i = 0; i < gc->max_num_queues; i++) { 1219 eq = ac->eqs[i].eq; 1220 if (!eq) 1221 continue; 1222 1223 mana_gd_destroy_queue(gc, eq); 1224 } 1225 1226 kfree(ac->eqs); 1227 ac->eqs = NULL; 1228 } 1229 1230 static int mana_create_eq(struct mana_context *ac) 1231 { 1232 struct gdma_dev *gd = ac->gdma_dev; 1233 struct gdma_context *gc = gd->gdma_context; 1234 struct gdma_queue_spec spec = {}; 1235 int err; 1236 int i; 1237 1238 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq), 1239 GFP_KERNEL); 1240 if (!ac->eqs) 1241 return -ENOMEM; 1242 1243 spec.type = GDMA_EQ; 1244 spec.monitor_avl_buf = false; 1245 spec.queue_size = EQ_SIZE; 1246 spec.eq.callback = NULL; 1247 spec.eq.context = ac->eqs; 1248 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1249 1250 for (i = 0; i < gc->max_num_queues; i++) { 1251 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1252 if (err) 1253 goto out; 1254 } 1255 1256 return 0; 1257 out: 1258 mana_destroy_eq(ac); 1259 return err; 1260 } 1261 1262 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1263 { 1264 struct mana_fence_rq_resp resp = {}; 1265 struct mana_fence_rq_req req = {}; 1266 int err; 1267 1268 init_completion(&rxq->fence_event); 1269 1270 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1271 sizeof(req), sizeof(resp)); 1272 req.wq_obj_handle = rxq->rxobj; 1273 1274 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1275 sizeof(resp)); 1276 if (err) { 1277 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1278 rxq->rxq_idx, err); 1279 return err; 1280 } 1281 1282 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1283 if (err || resp.hdr.status) { 1284 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1285 rxq->rxq_idx, err, resp.hdr.status); 1286 if (!err) 1287 err = -EPROTO; 1288 1289 return err; 1290 } 1291 1292 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1293 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1294 rxq->rxq_idx); 1295 return -ETIMEDOUT; 1296 } 1297 1298 return 0; 1299 } 1300 1301 static void mana_fence_rqs(struct mana_port_context *apc) 1302 { 1303 unsigned int rxq_idx; 1304 struct mana_rxq *rxq; 1305 int err; 1306 1307 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1308 rxq = apc->rxqs[rxq_idx]; 1309 err = mana_fence_rq(apc, rxq); 1310 1311 /* In case of any error, use sleep instead. */ 1312 if (err) 1313 msleep(100); 1314 } 1315 } 1316 1317 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1318 { 1319 u32 used_space_old; 1320 u32 used_space_new; 1321 1322 used_space_old = wq->head - wq->tail; 1323 used_space_new = wq->head - (wq->tail + num_units); 1324 1325 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1326 return -ERANGE; 1327 1328 wq->tail += num_units; 1329 return 0; 1330 } 1331 1332 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1333 { 1334 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1335 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1336 struct device *dev = gc->dev; 1337 int hsg, i; 1338 1339 /* Number of SGEs of linear part */ 1340 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1341 1342 for (i = 0; i < hsg; i++) 1343 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1344 DMA_TO_DEVICE); 1345 1346 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1347 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1348 DMA_TO_DEVICE); 1349 } 1350 1351 static void mana_poll_tx_cq(struct mana_cq *cq) 1352 { 1353 struct gdma_comp *completions = cq->gdma_comp_buf; 1354 struct gdma_posted_wqe_info *wqe_info; 1355 unsigned int pkt_transmitted = 0; 1356 unsigned int wqe_unit_cnt = 0; 1357 struct mana_txq *txq = cq->txq; 1358 struct mana_port_context *apc; 1359 struct netdev_queue *net_txq; 1360 struct gdma_queue *gdma_wq; 1361 unsigned int avail_space; 1362 struct net_device *ndev; 1363 struct sk_buff *skb; 1364 bool txq_stopped; 1365 int comp_read; 1366 int i; 1367 1368 ndev = txq->ndev; 1369 apc = netdev_priv(ndev); 1370 1371 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1372 CQE_POLLING_BUFFER); 1373 1374 if (comp_read < 1) 1375 return; 1376 1377 for (i = 0; i < comp_read; i++) { 1378 struct mana_tx_comp_oob *cqe_oob; 1379 1380 if (WARN_ON_ONCE(!completions[i].is_sq)) 1381 return; 1382 1383 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1384 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1385 MANA_CQE_COMPLETION)) 1386 return; 1387 1388 switch (cqe_oob->cqe_hdr.cqe_type) { 1389 case CQE_TX_OKAY: 1390 break; 1391 1392 case CQE_TX_SA_DROP: 1393 case CQE_TX_MTU_DROP: 1394 case CQE_TX_INVALID_OOB: 1395 case CQE_TX_INVALID_ETH_TYPE: 1396 case CQE_TX_HDR_PROCESSING_ERROR: 1397 case CQE_TX_VF_DISABLED: 1398 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1399 case CQE_TX_VPORT_DISABLED: 1400 case CQE_TX_VLAN_TAGGING_VIOLATION: 1401 if (net_ratelimit()) 1402 netdev_err(ndev, "TX: CQE error %d\n", 1403 cqe_oob->cqe_hdr.cqe_type); 1404 1405 apc->eth_stats.tx_cqe_err++; 1406 break; 1407 1408 default: 1409 /* If the CQE type is unknown, log an error, 1410 * and still free the SKB, update tail, etc. 1411 */ 1412 if (net_ratelimit()) 1413 netdev_err(ndev, "TX: unknown CQE type %d\n", 1414 cqe_oob->cqe_hdr.cqe_type); 1415 1416 apc->eth_stats.tx_cqe_unknown_type++; 1417 break; 1418 } 1419 1420 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1421 return; 1422 1423 skb = skb_dequeue(&txq->pending_skbs); 1424 if (WARN_ON_ONCE(!skb)) 1425 return; 1426 1427 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1428 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1429 1430 mana_unmap_skb(skb, apc); 1431 1432 napi_consume_skb(skb, cq->budget); 1433 1434 pkt_transmitted++; 1435 } 1436 1437 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1438 return; 1439 1440 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1441 1442 gdma_wq = txq->gdma_sq; 1443 avail_space = mana_gd_wq_avail_space(gdma_wq); 1444 1445 /* Ensure tail updated before checking q stop */ 1446 smp_mb(); 1447 1448 net_txq = txq->net_txq; 1449 txq_stopped = netif_tx_queue_stopped(net_txq); 1450 1451 /* Ensure checking txq_stopped before apc->port_is_up. */ 1452 smp_rmb(); 1453 1454 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1455 netif_tx_wake_queue(net_txq); 1456 apc->eth_stats.wake_queue++; 1457 } 1458 1459 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1460 WARN_ON_ONCE(1); 1461 1462 cq->work_done = pkt_transmitted; 1463 } 1464 1465 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1466 { 1467 struct mana_recv_buf_oob *recv_buf_oob; 1468 u32 curr_index; 1469 int err; 1470 1471 curr_index = rxq->buf_index++; 1472 if (rxq->buf_index == rxq->num_rx_buf) 1473 rxq->buf_index = 0; 1474 1475 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1476 1477 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1478 &recv_buf_oob->wqe_inf); 1479 if (WARN_ON_ONCE(err)) 1480 return; 1481 1482 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1483 } 1484 1485 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1486 uint pkt_len, struct xdp_buff *xdp) 1487 { 1488 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1489 1490 if (!skb) 1491 return NULL; 1492 1493 if (xdp->data_hard_start) { 1494 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1495 skb_put(skb, xdp->data_end - xdp->data); 1496 return skb; 1497 } 1498 1499 skb_reserve(skb, rxq->headroom); 1500 skb_put(skb, pkt_len); 1501 1502 return skb; 1503 } 1504 1505 static void mana_rx_skb(void *buf_va, bool from_pool, 1506 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) 1507 { 1508 struct mana_stats_rx *rx_stats = &rxq->stats; 1509 struct net_device *ndev = rxq->ndev; 1510 uint pkt_len = cqe->ppi[0].pkt_len; 1511 u16 rxq_idx = rxq->rxq_idx; 1512 struct napi_struct *napi; 1513 struct xdp_buff xdp = {}; 1514 struct sk_buff *skb; 1515 u32 hash_value; 1516 u32 act; 1517 1518 rxq->rx_cq.work_done++; 1519 napi = &rxq->rx_cq.napi; 1520 1521 if (!buf_va) { 1522 ++ndev->stats.rx_dropped; 1523 return; 1524 } 1525 1526 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1527 1528 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1529 return; 1530 1531 if (act != XDP_PASS && act != XDP_TX) 1532 goto drop_xdp; 1533 1534 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1535 1536 if (!skb) 1537 goto drop; 1538 1539 if (from_pool) 1540 skb_mark_for_recycle(skb); 1541 1542 skb->dev = napi->dev; 1543 1544 skb->protocol = eth_type_trans(skb, ndev); 1545 skb_checksum_none_assert(skb); 1546 skb_record_rx_queue(skb, rxq_idx); 1547 1548 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1549 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1550 skb->ip_summed = CHECKSUM_UNNECESSARY; 1551 } 1552 1553 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1554 hash_value = cqe->ppi[0].pkt_hash; 1555 1556 if (cqe->rx_hashtype & MANA_HASH_L4) 1557 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1558 else 1559 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1560 } 1561 1562 if (cqe->rx_vlantag_present) { 1563 u16 vlan_tci = cqe->rx_vlan_id; 1564 1565 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1566 } 1567 1568 u64_stats_update_begin(&rx_stats->syncp); 1569 rx_stats->packets++; 1570 rx_stats->bytes += pkt_len; 1571 1572 if (act == XDP_TX) 1573 rx_stats->xdp_tx++; 1574 u64_stats_update_end(&rx_stats->syncp); 1575 1576 if (act == XDP_TX) { 1577 skb_set_queue_mapping(skb, rxq_idx); 1578 mana_xdp_tx(skb, ndev); 1579 return; 1580 } 1581 1582 napi_gro_receive(napi, skb); 1583 1584 return; 1585 1586 drop_xdp: 1587 u64_stats_update_begin(&rx_stats->syncp); 1588 rx_stats->xdp_drop++; 1589 u64_stats_update_end(&rx_stats->syncp); 1590 1591 drop: 1592 if (from_pool) { 1593 page_pool_recycle_direct(rxq->page_pool, 1594 virt_to_head_page(buf_va)); 1595 } else { 1596 WARN_ON_ONCE(rxq->xdp_save_va); 1597 /* Save for reuse */ 1598 rxq->xdp_save_va = buf_va; 1599 } 1600 1601 ++ndev->stats.rx_dropped; 1602 1603 return; 1604 } 1605 1606 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 1607 dma_addr_t *da, bool *from_pool, bool is_napi) 1608 { 1609 struct page *page; 1610 void *va; 1611 1612 *from_pool = false; 1613 1614 /* Reuse XDP dropped page if available */ 1615 if (rxq->xdp_save_va) { 1616 va = rxq->xdp_save_va; 1617 rxq->xdp_save_va = NULL; 1618 } else if (rxq->alloc_size > PAGE_SIZE) { 1619 if (is_napi) 1620 va = napi_alloc_frag(rxq->alloc_size); 1621 else 1622 va = netdev_alloc_frag(rxq->alloc_size); 1623 1624 if (!va) 1625 return NULL; 1626 1627 page = virt_to_head_page(va); 1628 /* Check if the frag falls back to single page */ 1629 if (compound_order(page) < get_order(rxq->alloc_size)) { 1630 put_page(page); 1631 return NULL; 1632 } 1633 } else { 1634 page = page_pool_dev_alloc_pages(rxq->page_pool); 1635 if (!page) 1636 return NULL; 1637 1638 *from_pool = true; 1639 va = page_to_virt(page); 1640 } 1641 1642 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 1643 DMA_FROM_DEVICE); 1644 if (dma_mapping_error(dev, *da)) { 1645 if (*from_pool) 1646 page_pool_put_full_page(rxq->page_pool, page, false); 1647 else 1648 put_page(virt_to_head_page(va)); 1649 1650 return NULL; 1651 } 1652 1653 return va; 1654 } 1655 1656 /* Allocate frag for rx buffer, and save the old buf */ 1657 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 1658 struct mana_recv_buf_oob *rxoob, void **old_buf, 1659 bool *old_fp) 1660 { 1661 bool from_pool; 1662 dma_addr_t da; 1663 void *va; 1664 1665 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, true); 1666 if (!va) 1667 return; 1668 1669 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 1670 DMA_FROM_DEVICE); 1671 *old_buf = rxoob->buf_va; 1672 *old_fp = rxoob->from_pool; 1673 1674 rxoob->buf_va = va; 1675 rxoob->sgl[0].address = da; 1676 rxoob->from_pool = from_pool; 1677 } 1678 1679 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1680 struct gdma_comp *cqe) 1681 { 1682 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1683 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1684 struct net_device *ndev = rxq->ndev; 1685 struct mana_recv_buf_oob *rxbuf_oob; 1686 struct mana_port_context *apc; 1687 struct device *dev = gc->dev; 1688 void *old_buf = NULL; 1689 u32 curr, pktlen; 1690 bool old_fp; 1691 1692 apc = netdev_priv(ndev); 1693 1694 switch (oob->cqe_hdr.cqe_type) { 1695 case CQE_RX_OKAY: 1696 break; 1697 1698 case CQE_RX_TRUNCATED: 1699 ++ndev->stats.rx_dropped; 1700 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1701 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1702 goto drop; 1703 1704 case CQE_RX_COALESCED_4: 1705 netdev_err(ndev, "RX coalescing is unsupported\n"); 1706 apc->eth_stats.rx_coalesced_err++; 1707 return; 1708 1709 case CQE_RX_OBJECT_FENCE: 1710 complete(&rxq->fence_event); 1711 return; 1712 1713 default: 1714 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1715 oob->cqe_hdr.cqe_type); 1716 apc->eth_stats.rx_cqe_unknown_type++; 1717 return; 1718 } 1719 1720 pktlen = oob->ppi[0].pkt_len; 1721 1722 if (pktlen == 0) { 1723 /* data packets should never have packetlength of zero */ 1724 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1725 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1726 return; 1727 } 1728 1729 curr = rxq->buf_index; 1730 rxbuf_oob = &rxq->rx_oobs[curr]; 1731 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1732 1733 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 1734 1735 /* Unsuccessful refill will have old_buf == NULL. 1736 * In this case, mana_rx_skb() will drop the packet. 1737 */ 1738 mana_rx_skb(old_buf, old_fp, oob, rxq); 1739 1740 drop: 1741 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1742 1743 mana_post_pkt_rxq(rxq); 1744 } 1745 1746 static void mana_poll_rx_cq(struct mana_cq *cq) 1747 { 1748 struct gdma_comp *comp = cq->gdma_comp_buf; 1749 struct mana_rxq *rxq = cq->rxq; 1750 int comp_read, i; 1751 1752 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1753 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1754 1755 rxq->xdp_flush = false; 1756 1757 for (i = 0; i < comp_read; i++) { 1758 if (WARN_ON_ONCE(comp[i].is_sq)) 1759 return; 1760 1761 /* verify recv cqe references the right rxq */ 1762 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1763 return; 1764 1765 mana_process_rx_cqe(rxq, cq, &comp[i]); 1766 } 1767 1768 if (comp_read > 0) { 1769 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1770 1771 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 1772 } 1773 1774 if (rxq->xdp_flush) 1775 xdp_do_flush(); 1776 } 1777 1778 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1779 { 1780 struct mana_cq *cq = context; 1781 int w; 1782 1783 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1784 1785 if (cq->type == MANA_CQ_TYPE_RX) 1786 mana_poll_rx_cq(cq); 1787 else 1788 mana_poll_tx_cq(cq); 1789 1790 w = cq->work_done; 1791 cq->work_done_since_doorbell += w; 1792 1793 if (w < cq->budget) { 1794 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT); 1795 cq->work_done_since_doorbell = 0; 1796 napi_complete_done(&cq->napi, w); 1797 } else if (cq->work_done_since_doorbell > 1798 cq->gdma_cq->queue_size / COMP_ENTRY_SIZE * 4) { 1799 /* MANA hardware requires at least one doorbell ring every 8 1800 * wraparounds of CQ even if there is no need to arm the CQ. 1801 * This driver rings the doorbell as soon as we have exceeded 1802 * 4 wraparounds. 1803 */ 1804 mana_gd_ring_cq(gdma_queue, 0); 1805 cq->work_done_since_doorbell = 0; 1806 } 1807 1808 return w; 1809 } 1810 1811 static int mana_poll(struct napi_struct *napi, int budget) 1812 { 1813 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1814 int w; 1815 1816 cq->work_done = 0; 1817 cq->budget = budget; 1818 1819 w = mana_cq_handler(cq, cq->gdma_cq); 1820 1821 return min(w, budget); 1822 } 1823 1824 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1825 { 1826 struct mana_cq *cq = context; 1827 1828 napi_schedule_irqoff(&cq->napi); 1829 } 1830 1831 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1832 { 1833 struct gdma_dev *gd = apc->ac->gdma_dev; 1834 1835 if (!cq->gdma_cq) 1836 return; 1837 1838 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1839 } 1840 1841 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1842 { 1843 struct gdma_dev *gd = apc->ac->gdma_dev; 1844 1845 if (!txq->gdma_sq) 1846 return; 1847 1848 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1849 } 1850 1851 static void mana_destroy_txq(struct mana_port_context *apc) 1852 { 1853 struct napi_struct *napi; 1854 int i; 1855 1856 if (!apc->tx_qp) 1857 return; 1858 1859 for (i = 0; i < apc->num_queues; i++) { 1860 napi = &apc->tx_qp[i].tx_cq.napi; 1861 if (apc->tx_qp[i].txq.napi_initialized) { 1862 napi_synchronize(napi); 1863 napi_disable(napi); 1864 netif_napi_del(napi); 1865 apc->tx_qp[i].txq.napi_initialized = false; 1866 } 1867 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1868 1869 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1870 1871 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1872 } 1873 1874 kfree(apc->tx_qp); 1875 apc->tx_qp = NULL; 1876 } 1877 1878 static int mana_create_txq(struct mana_port_context *apc, 1879 struct net_device *net) 1880 { 1881 struct mana_context *ac = apc->ac; 1882 struct gdma_dev *gd = ac->gdma_dev; 1883 struct mana_obj_spec wq_spec; 1884 struct mana_obj_spec cq_spec; 1885 struct gdma_queue_spec spec; 1886 struct gdma_context *gc; 1887 struct mana_txq *txq; 1888 struct mana_cq *cq; 1889 u32 txq_size; 1890 u32 cq_size; 1891 int err; 1892 int i; 1893 1894 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1895 GFP_KERNEL); 1896 if (!apc->tx_qp) 1897 return -ENOMEM; 1898 1899 /* The minimum size of the WQE is 32 bytes, hence 1900 * MAX_SEND_BUFFERS_PER_QUEUE represents the maximum number of WQEs 1901 * the SQ can store. This value is then used to size other queues 1902 * to prevent overflow. 1903 */ 1904 txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32; 1905 BUILD_BUG_ON(!MANA_PAGE_ALIGNED(txq_size)); 1906 1907 cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE; 1908 cq_size = MANA_PAGE_ALIGN(cq_size); 1909 1910 gc = gd->gdma_context; 1911 1912 for (i = 0; i < apc->num_queues; i++) { 1913 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1914 1915 /* Create SQ */ 1916 txq = &apc->tx_qp[i].txq; 1917 1918 u64_stats_init(&txq->stats.syncp); 1919 txq->ndev = net; 1920 txq->net_txq = netdev_get_tx_queue(net, i); 1921 txq->vp_offset = apc->tx_vp_offset; 1922 txq->napi_initialized = false; 1923 skb_queue_head_init(&txq->pending_skbs); 1924 1925 memset(&spec, 0, sizeof(spec)); 1926 spec.type = GDMA_SQ; 1927 spec.monitor_avl_buf = true; 1928 spec.queue_size = txq_size; 1929 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 1930 if (err) 1931 goto out; 1932 1933 /* Create SQ's CQ */ 1934 cq = &apc->tx_qp[i].tx_cq; 1935 cq->type = MANA_CQ_TYPE_TX; 1936 1937 cq->txq = txq; 1938 1939 memset(&spec, 0, sizeof(spec)); 1940 spec.type = GDMA_CQ; 1941 spec.monitor_avl_buf = false; 1942 spec.queue_size = cq_size; 1943 spec.cq.callback = mana_schedule_napi; 1944 spec.cq.parent_eq = ac->eqs[i].eq; 1945 spec.cq.context = cq; 1946 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 1947 if (err) 1948 goto out; 1949 1950 memset(&wq_spec, 0, sizeof(wq_spec)); 1951 memset(&cq_spec, 0, sizeof(cq_spec)); 1952 1953 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 1954 wq_spec.queue_size = txq->gdma_sq->queue_size; 1955 1956 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 1957 cq_spec.queue_size = cq->gdma_cq->queue_size; 1958 cq_spec.modr_ctx_id = 0; 1959 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 1960 1961 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 1962 &wq_spec, &cq_spec, 1963 &apc->tx_qp[i].tx_object); 1964 1965 if (err) 1966 goto out; 1967 1968 txq->gdma_sq->id = wq_spec.queue_index; 1969 cq->gdma_cq->id = cq_spec.queue_index; 1970 1971 txq->gdma_sq->mem_info.dma_region_handle = 1972 GDMA_INVALID_DMA_REGION; 1973 cq->gdma_cq->mem_info.dma_region_handle = 1974 GDMA_INVALID_DMA_REGION; 1975 1976 txq->gdma_txq_id = txq->gdma_sq->id; 1977 1978 cq->gdma_id = cq->gdma_cq->id; 1979 1980 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 1981 err = -EINVAL; 1982 goto out; 1983 } 1984 1985 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 1986 1987 netif_napi_add_tx(net, &cq->napi, mana_poll); 1988 napi_enable(&cq->napi); 1989 txq->napi_initialized = true; 1990 1991 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 1992 } 1993 1994 return 0; 1995 out: 1996 mana_destroy_txq(apc); 1997 return err; 1998 } 1999 2000 static void mana_destroy_rxq(struct mana_port_context *apc, 2001 struct mana_rxq *rxq, bool napi_initialized) 2002 2003 { 2004 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2005 struct mana_recv_buf_oob *rx_oob; 2006 struct device *dev = gc->dev; 2007 struct napi_struct *napi; 2008 struct page *page; 2009 int i; 2010 2011 if (!rxq) 2012 return; 2013 2014 napi = &rxq->rx_cq.napi; 2015 2016 if (napi_initialized) { 2017 napi_synchronize(napi); 2018 2019 napi_disable(napi); 2020 2021 netif_napi_del(napi); 2022 } 2023 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2024 2025 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2026 2027 mana_deinit_cq(apc, &rxq->rx_cq); 2028 2029 if (rxq->xdp_save_va) 2030 put_page(virt_to_head_page(rxq->xdp_save_va)); 2031 2032 for (i = 0; i < rxq->num_rx_buf; i++) { 2033 rx_oob = &rxq->rx_oobs[i]; 2034 2035 if (!rx_oob->buf_va) 2036 continue; 2037 2038 dma_unmap_single(dev, rx_oob->sgl[0].address, 2039 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2040 2041 page = virt_to_head_page(rx_oob->buf_va); 2042 2043 if (rx_oob->from_pool) 2044 page_pool_put_full_page(rxq->page_pool, page, false); 2045 else 2046 put_page(page); 2047 2048 rx_oob->buf_va = NULL; 2049 } 2050 2051 page_pool_destroy(rxq->page_pool); 2052 2053 if (rxq->gdma_rq) 2054 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2055 2056 kfree(rxq); 2057 } 2058 2059 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2060 struct mana_rxq *rxq, struct device *dev) 2061 { 2062 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2063 bool from_pool = false; 2064 dma_addr_t da; 2065 void *va; 2066 2067 if (mpc->rxbufs_pre) 2068 va = mana_get_rxbuf_pre(rxq, &da); 2069 else 2070 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, false); 2071 2072 if (!va) 2073 return -ENOMEM; 2074 2075 rx_oob->buf_va = va; 2076 rx_oob->from_pool = from_pool; 2077 2078 rx_oob->sgl[0].address = da; 2079 rx_oob->sgl[0].size = rxq->datasize; 2080 rx_oob->sgl[0].mem_key = mem_key; 2081 2082 return 0; 2083 } 2084 2085 #define MANA_WQE_HEADER_SIZE 16 2086 #define MANA_WQE_SGE_SIZE 16 2087 2088 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2089 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2090 { 2091 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2092 struct mana_recv_buf_oob *rx_oob; 2093 struct device *dev = gc->dev; 2094 u32 buf_idx; 2095 int ret; 2096 2097 WARN_ON(rxq->datasize == 0); 2098 2099 *rxq_size = 0; 2100 *cq_size = 0; 2101 2102 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2103 rx_oob = &rxq->rx_oobs[buf_idx]; 2104 memset(rx_oob, 0, sizeof(*rx_oob)); 2105 2106 rx_oob->num_sge = 1; 2107 2108 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2109 dev); 2110 if (ret) 2111 return ret; 2112 2113 rx_oob->wqe_req.sgl = rx_oob->sgl; 2114 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2115 rx_oob->wqe_req.inline_oob_size = 0; 2116 rx_oob->wqe_req.inline_oob_data = NULL; 2117 rx_oob->wqe_req.flags = 0; 2118 rx_oob->wqe_req.client_data_unit = 0; 2119 2120 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2121 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2122 *cq_size += COMP_ENTRY_SIZE; 2123 } 2124 2125 return 0; 2126 } 2127 2128 static int mana_push_wqe(struct mana_rxq *rxq) 2129 { 2130 struct mana_recv_buf_oob *rx_oob; 2131 u32 buf_idx; 2132 int err; 2133 2134 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2135 rx_oob = &rxq->rx_oobs[buf_idx]; 2136 2137 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2138 &rx_oob->wqe_inf); 2139 if (err) 2140 return -ENOSPC; 2141 } 2142 2143 return 0; 2144 } 2145 2146 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2147 { 2148 struct page_pool_params pprm = {}; 2149 int ret; 2150 2151 pprm.pool_size = RX_BUFFERS_PER_QUEUE; 2152 pprm.nid = gc->numa_node; 2153 pprm.napi = &rxq->rx_cq.napi; 2154 2155 rxq->page_pool = page_pool_create(&pprm); 2156 2157 if (IS_ERR(rxq->page_pool)) { 2158 ret = PTR_ERR(rxq->page_pool); 2159 rxq->page_pool = NULL; 2160 return ret; 2161 } 2162 2163 return 0; 2164 } 2165 2166 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2167 u32 rxq_idx, struct mana_eq *eq, 2168 struct net_device *ndev) 2169 { 2170 struct gdma_dev *gd = apc->ac->gdma_dev; 2171 struct mana_obj_spec wq_spec; 2172 struct mana_obj_spec cq_spec; 2173 struct gdma_queue_spec spec; 2174 struct mana_cq *cq = NULL; 2175 struct gdma_context *gc; 2176 u32 cq_size, rq_size; 2177 struct mana_rxq *rxq; 2178 int err; 2179 2180 gc = gd->gdma_context; 2181 2182 rxq = kzalloc(struct_size(rxq, rx_oobs, RX_BUFFERS_PER_QUEUE), 2183 GFP_KERNEL); 2184 if (!rxq) 2185 return NULL; 2186 2187 rxq->ndev = ndev; 2188 rxq->num_rx_buf = RX_BUFFERS_PER_QUEUE; 2189 rxq->rxq_idx = rxq_idx; 2190 rxq->rxobj = INVALID_MANA_HANDLE; 2191 2192 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2193 &rxq->headroom); 2194 2195 /* Create page pool for RX queue */ 2196 err = mana_create_page_pool(rxq, gc); 2197 if (err) { 2198 netdev_err(ndev, "Create page pool err:%d\n", err); 2199 goto out; 2200 } 2201 2202 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2203 if (err) 2204 goto out; 2205 2206 rq_size = MANA_PAGE_ALIGN(rq_size); 2207 cq_size = MANA_PAGE_ALIGN(cq_size); 2208 2209 /* Create RQ */ 2210 memset(&spec, 0, sizeof(spec)); 2211 spec.type = GDMA_RQ; 2212 spec.monitor_avl_buf = true; 2213 spec.queue_size = rq_size; 2214 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2215 if (err) 2216 goto out; 2217 2218 /* Create RQ's CQ */ 2219 cq = &rxq->rx_cq; 2220 cq->type = MANA_CQ_TYPE_RX; 2221 cq->rxq = rxq; 2222 2223 memset(&spec, 0, sizeof(spec)); 2224 spec.type = GDMA_CQ; 2225 spec.monitor_avl_buf = false; 2226 spec.queue_size = cq_size; 2227 spec.cq.callback = mana_schedule_napi; 2228 spec.cq.parent_eq = eq->eq; 2229 spec.cq.context = cq; 2230 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2231 if (err) 2232 goto out; 2233 2234 memset(&wq_spec, 0, sizeof(wq_spec)); 2235 memset(&cq_spec, 0, sizeof(cq_spec)); 2236 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2237 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2238 2239 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2240 cq_spec.queue_size = cq->gdma_cq->queue_size; 2241 cq_spec.modr_ctx_id = 0; 2242 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2243 2244 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2245 &wq_spec, &cq_spec, &rxq->rxobj); 2246 if (err) 2247 goto out; 2248 2249 rxq->gdma_rq->id = wq_spec.queue_index; 2250 cq->gdma_cq->id = cq_spec.queue_index; 2251 2252 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2253 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2254 2255 rxq->gdma_id = rxq->gdma_rq->id; 2256 cq->gdma_id = cq->gdma_cq->id; 2257 2258 err = mana_push_wqe(rxq); 2259 if (err) 2260 goto out; 2261 2262 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2263 err = -EINVAL; 2264 goto out; 2265 } 2266 2267 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2268 2269 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2270 2271 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2272 cq->napi.napi_id)); 2273 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2274 rxq->page_pool)); 2275 2276 napi_enable(&cq->napi); 2277 2278 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2279 out: 2280 if (!err) 2281 return rxq; 2282 2283 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2284 2285 mana_destroy_rxq(apc, rxq, false); 2286 2287 if (cq) 2288 mana_deinit_cq(apc, cq); 2289 2290 return NULL; 2291 } 2292 2293 static int mana_add_rx_queues(struct mana_port_context *apc, 2294 struct net_device *ndev) 2295 { 2296 struct mana_context *ac = apc->ac; 2297 struct mana_rxq *rxq; 2298 int err = 0; 2299 int i; 2300 2301 for (i = 0; i < apc->num_queues; i++) { 2302 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2303 if (!rxq) { 2304 err = -ENOMEM; 2305 goto out; 2306 } 2307 2308 u64_stats_init(&rxq->stats.syncp); 2309 2310 apc->rxqs[i] = rxq; 2311 } 2312 2313 apc->default_rxobj = apc->rxqs[0]->rxobj; 2314 out: 2315 return err; 2316 } 2317 2318 static void mana_destroy_vport(struct mana_port_context *apc) 2319 { 2320 struct gdma_dev *gd = apc->ac->gdma_dev; 2321 struct mana_rxq *rxq; 2322 u32 rxq_idx; 2323 2324 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2325 rxq = apc->rxqs[rxq_idx]; 2326 if (!rxq) 2327 continue; 2328 2329 mana_destroy_rxq(apc, rxq, true); 2330 apc->rxqs[rxq_idx] = NULL; 2331 } 2332 2333 mana_destroy_txq(apc); 2334 mana_uncfg_vport(apc); 2335 2336 if (gd->gdma_context->is_pf) 2337 mana_pf_deregister_hw_vport(apc); 2338 } 2339 2340 static int mana_create_vport(struct mana_port_context *apc, 2341 struct net_device *net) 2342 { 2343 struct gdma_dev *gd = apc->ac->gdma_dev; 2344 int err; 2345 2346 apc->default_rxobj = INVALID_MANA_HANDLE; 2347 2348 if (gd->gdma_context->is_pf) { 2349 err = mana_pf_register_hw_vport(apc); 2350 if (err) 2351 return err; 2352 } 2353 2354 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2355 if (err) 2356 return err; 2357 2358 return mana_create_txq(apc, net); 2359 } 2360 2361 static void mana_rss_table_init(struct mana_port_context *apc) 2362 { 2363 int i; 2364 2365 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 2366 apc->indir_table[i] = 2367 ethtool_rxfh_indir_default(i, apc->num_queues); 2368 } 2369 2370 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2371 bool update_hash, bool update_tab) 2372 { 2373 u32 queue_idx; 2374 int err; 2375 int i; 2376 2377 if (update_tab) { 2378 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) { 2379 queue_idx = apc->indir_table[i]; 2380 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2381 } 2382 } 2383 2384 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2385 if (err) 2386 return err; 2387 2388 mana_fence_rqs(apc); 2389 2390 return 0; 2391 } 2392 2393 void mana_query_gf_stats(struct mana_port_context *apc) 2394 { 2395 struct mana_query_gf_stat_resp resp = {}; 2396 struct mana_query_gf_stat_req req = {}; 2397 struct net_device *ndev = apc->ndev; 2398 int err; 2399 2400 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2401 sizeof(req), sizeof(resp)); 2402 req.req_stats = STATISTICS_FLAGS_HC_TX_BYTES | 2403 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2404 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2405 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2406 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2407 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2408 STATISTICS_FLAGS_HC_TX_BCAST_BYTES; 2409 2410 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 2411 sizeof(resp)); 2412 if (err) { 2413 netdev_err(ndev, "Failed to query GF stats: %d\n", err); 2414 return; 2415 } 2416 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2417 sizeof(resp)); 2418 if (err || resp.hdr.status) { 2419 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err, 2420 resp.hdr.status); 2421 return; 2422 } 2423 2424 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes; 2425 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2426 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2427 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2428 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2429 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2430 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2431 } 2432 2433 static int mana_init_port(struct net_device *ndev) 2434 { 2435 struct mana_port_context *apc = netdev_priv(ndev); 2436 u32 max_txq, max_rxq, max_queues; 2437 int port_idx = apc->port_idx; 2438 u32 num_indirect_entries; 2439 int err; 2440 2441 err = mana_init_port_context(apc); 2442 if (err) 2443 return err; 2444 2445 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2446 &num_indirect_entries); 2447 if (err) { 2448 netdev_err(ndev, "Failed to query info for vPort %d\n", 2449 port_idx); 2450 goto reset_apc; 2451 } 2452 2453 max_queues = min_t(u32, max_txq, max_rxq); 2454 if (apc->max_queues > max_queues) 2455 apc->max_queues = max_queues; 2456 2457 if (apc->num_queues > apc->max_queues) 2458 apc->num_queues = apc->max_queues; 2459 2460 eth_hw_addr_set(ndev, apc->mac_addr); 2461 2462 return 0; 2463 2464 reset_apc: 2465 kfree(apc->rxqs); 2466 apc->rxqs = NULL; 2467 return err; 2468 } 2469 2470 int mana_alloc_queues(struct net_device *ndev) 2471 { 2472 struct mana_port_context *apc = netdev_priv(ndev); 2473 struct gdma_dev *gd = apc->ac->gdma_dev; 2474 int err; 2475 2476 err = mana_create_vport(apc, ndev); 2477 if (err) 2478 return err; 2479 2480 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2481 if (err) 2482 goto destroy_vport; 2483 2484 err = mana_add_rx_queues(apc, ndev); 2485 if (err) 2486 goto destroy_vport; 2487 2488 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2489 2490 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2491 if (err) 2492 goto destroy_vport; 2493 2494 mana_rss_table_init(apc); 2495 2496 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2497 if (err) 2498 goto destroy_vport; 2499 2500 if (gd->gdma_context->is_pf) { 2501 err = mana_pf_register_filter(apc); 2502 if (err) 2503 goto destroy_vport; 2504 } 2505 2506 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2507 2508 return 0; 2509 2510 destroy_vport: 2511 mana_destroy_vport(apc); 2512 return err; 2513 } 2514 2515 int mana_attach(struct net_device *ndev) 2516 { 2517 struct mana_port_context *apc = netdev_priv(ndev); 2518 int err; 2519 2520 ASSERT_RTNL(); 2521 2522 err = mana_init_port(ndev); 2523 if (err) 2524 return err; 2525 2526 if (apc->port_st_save) { 2527 err = mana_alloc_queues(ndev); 2528 if (err) { 2529 mana_cleanup_port_context(apc); 2530 return err; 2531 } 2532 } 2533 2534 apc->port_is_up = apc->port_st_save; 2535 2536 /* Ensure port state updated before txq state */ 2537 smp_wmb(); 2538 2539 if (apc->port_is_up) 2540 netif_carrier_on(ndev); 2541 2542 netif_device_attach(ndev); 2543 2544 return 0; 2545 } 2546 2547 static int mana_dealloc_queues(struct net_device *ndev) 2548 { 2549 struct mana_port_context *apc = netdev_priv(ndev); 2550 unsigned long timeout = jiffies + 120 * HZ; 2551 struct gdma_dev *gd = apc->ac->gdma_dev; 2552 struct mana_txq *txq; 2553 struct sk_buff *skb; 2554 int i, err; 2555 u32 tsleep; 2556 2557 if (apc->port_is_up) 2558 return -EINVAL; 2559 2560 mana_chn_setxdp(apc, NULL); 2561 2562 if (gd->gdma_context->is_pf) 2563 mana_pf_deregister_filter(apc); 2564 2565 /* No packet can be transmitted now since apc->port_is_up is false. 2566 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2567 * a txq because it may not timely see apc->port_is_up being cleared 2568 * to false, but it doesn't matter since mana_start_xmit() drops any 2569 * new packets due to apc->port_is_up being false. 2570 * 2571 * Drain all the in-flight TX packets. 2572 * A timeout of 120 seconds for all the queues is used. 2573 * This will break the while loop when h/w is not responding. 2574 * This value of 120 has been decided here considering max 2575 * number of queues. 2576 */ 2577 2578 for (i = 0; i < apc->num_queues; i++) { 2579 txq = &apc->tx_qp[i].txq; 2580 tsleep = 1000; 2581 while (atomic_read(&txq->pending_sends) > 0 && 2582 time_before(jiffies, timeout)) { 2583 usleep_range(tsleep, tsleep + 1000); 2584 tsleep <<= 1; 2585 } 2586 if (atomic_read(&txq->pending_sends)) { 2587 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 2588 if (err) { 2589 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 2590 err, atomic_read(&txq->pending_sends), 2591 txq->gdma_txq_id); 2592 } 2593 break; 2594 } 2595 } 2596 2597 for (i = 0; i < apc->num_queues; i++) { 2598 txq = &apc->tx_qp[i].txq; 2599 while ((skb = skb_dequeue(&txq->pending_skbs))) { 2600 mana_unmap_skb(skb, apc); 2601 dev_kfree_skb_any(skb); 2602 } 2603 atomic_set(&txq->pending_sends, 0); 2604 } 2605 /* We're 100% sure the queues can no longer be woken up, because 2606 * we're sure now mana_poll_tx_cq() can't be running. 2607 */ 2608 2609 apc->rss_state = TRI_STATE_FALSE; 2610 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2611 if (err) { 2612 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2613 return err; 2614 } 2615 2616 mana_destroy_vport(apc); 2617 2618 return 0; 2619 } 2620 2621 int mana_detach(struct net_device *ndev, bool from_close) 2622 { 2623 struct mana_port_context *apc = netdev_priv(ndev); 2624 int err; 2625 2626 ASSERT_RTNL(); 2627 2628 apc->port_st_save = apc->port_is_up; 2629 apc->port_is_up = false; 2630 2631 /* Ensure port state updated before txq state */ 2632 smp_wmb(); 2633 2634 netif_tx_disable(ndev); 2635 netif_carrier_off(ndev); 2636 2637 if (apc->port_st_save) { 2638 err = mana_dealloc_queues(ndev); 2639 if (err) 2640 return err; 2641 } 2642 2643 if (!from_close) { 2644 netif_device_detach(ndev); 2645 mana_cleanup_port_context(apc); 2646 } 2647 2648 return 0; 2649 } 2650 2651 static int mana_probe_port(struct mana_context *ac, int port_idx, 2652 struct net_device **ndev_storage) 2653 { 2654 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2655 struct mana_port_context *apc; 2656 struct net_device *ndev; 2657 int err; 2658 2659 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2660 gc->max_num_queues); 2661 if (!ndev) 2662 return -ENOMEM; 2663 2664 *ndev_storage = ndev; 2665 2666 apc = netdev_priv(ndev); 2667 apc->ac = ac; 2668 apc->ndev = ndev; 2669 apc->max_queues = gc->max_num_queues; 2670 apc->num_queues = gc->max_num_queues; 2671 apc->port_handle = INVALID_MANA_HANDLE; 2672 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2673 apc->port_idx = port_idx; 2674 2675 mutex_init(&apc->vport_mutex); 2676 apc->vport_use_count = 0; 2677 2678 ndev->netdev_ops = &mana_devops; 2679 ndev->ethtool_ops = &mana_ethtool_ops; 2680 ndev->mtu = ETH_DATA_LEN; 2681 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2682 ndev->min_mtu = ETH_MIN_MTU; 2683 ndev->needed_headroom = MANA_HEADROOM; 2684 ndev->dev_port = port_idx; 2685 SET_NETDEV_DEV(ndev, gc->dev); 2686 2687 netif_carrier_off(ndev); 2688 2689 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2690 2691 err = mana_init_port(ndev); 2692 if (err) 2693 goto free_net; 2694 2695 netdev_lockdep_set_classes(ndev); 2696 2697 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2698 ndev->hw_features |= NETIF_F_RXCSUM; 2699 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2700 ndev->hw_features |= NETIF_F_RXHASH; 2701 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2702 NETIF_F_HW_VLAN_CTAG_RX; 2703 ndev->vlan_features = ndev->features; 2704 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | 2705 NETDEV_XDP_ACT_NDO_XMIT; 2706 2707 err = register_netdev(ndev); 2708 if (err) { 2709 netdev_err(ndev, "Unable to register netdev.\n"); 2710 goto reset_apc; 2711 } 2712 2713 return 0; 2714 2715 reset_apc: 2716 kfree(apc->rxqs); 2717 apc->rxqs = NULL; 2718 free_net: 2719 *ndev_storage = NULL; 2720 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2721 free_netdev(ndev); 2722 return err; 2723 } 2724 2725 static void adev_release(struct device *dev) 2726 { 2727 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2728 2729 kfree(madev); 2730 } 2731 2732 static void remove_adev(struct gdma_dev *gd) 2733 { 2734 struct auxiliary_device *adev = gd->adev; 2735 int id = adev->id; 2736 2737 auxiliary_device_delete(adev); 2738 auxiliary_device_uninit(adev); 2739 2740 mana_adev_idx_free(id); 2741 gd->adev = NULL; 2742 } 2743 2744 static int add_adev(struct gdma_dev *gd) 2745 { 2746 struct auxiliary_device *adev; 2747 struct mana_adev *madev; 2748 int ret; 2749 2750 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2751 if (!madev) 2752 return -ENOMEM; 2753 2754 adev = &madev->adev; 2755 ret = mana_adev_idx_alloc(); 2756 if (ret < 0) 2757 goto idx_fail; 2758 adev->id = ret; 2759 2760 adev->name = "rdma"; 2761 adev->dev.parent = gd->gdma_context->dev; 2762 adev->dev.release = adev_release; 2763 madev->mdev = gd; 2764 2765 ret = auxiliary_device_init(adev); 2766 if (ret) 2767 goto init_fail; 2768 2769 /* madev is owned by the auxiliary device */ 2770 madev = NULL; 2771 ret = auxiliary_device_add(adev); 2772 if (ret) 2773 goto add_fail; 2774 2775 gd->adev = adev; 2776 return 0; 2777 2778 add_fail: 2779 auxiliary_device_uninit(adev); 2780 2781 init_fail: 2782 mana_adev_idx_free(adev->id); 2783 2784 idx_fail: 2785 kfree(madev); 2786 2787 return ret; 2788 } 2789 2790 int mana_probe(struct gdma_dev *gd, bool resuming) 2791 { 2792 struct gdma_context *gc = gd->gdma_context; 2793 struct mana_context *ac = gd->driver_data; 2794 struct device *dev = gc->dev; 2795 u16 num_ports = 0; 2796 int err; 2797 int i; 2798 2799 dev_info(dev, 2800 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2801 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2802 2803 err = mana_gd_register_device(gd); 2804 if (err) 2805 return err; 2806 2807 if (!resuming) { 2808 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 2809 if (!ac) 2810 return -ENOMEM; 2811 2812 ac->gdma_dev = gd; 2813 gd->driver_data = ac; 2814 } 2815 2816 err = mana_create_eq(ac); 2817 if (err) 2818 goto out; 2819 2820 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 2821 MANA_MICRO_VERSION, &num_ports); 2822 if (err) 2823 goto out; 2824 2825 if (!resuming) { 2826 ac->num_ports = num_ports; 2827 } else { 2828 if (ac->num_ports != num_ports) { 2829 dev_err(dev, "The number of vPorts changed: %d->%d\n", 2830 ac->num_ports, num_ports); 2831 err = -EPROTO; 2832 goto out; 2833 } 2834 } 2835 2836 if (ac->num_ports == 0) 2837 dev_err(dev, "Failed to detect any vPort\n"); 2838 2839 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 2840 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 2841 2842 if (!resuming) { 2843 for (i = 0; i < ac->num_ports; i++) { 2844 err = mana_probe_port(ac, i, &ac->ports[i]); 2845 if (err) 2846 break; 2847 } 2848 } else { 2849 for (i = 0; i < ac->num_ports; i++) { 2850 rtnl_lock(); 2851 err = mana_attach(ac->ports[i]); 2852 rtnl_unlock(); 2853 if (err) 2854 break; 2855 } 2856 } 2857 2858 err = add_adev(gd); 2859 out: 2860 if (err) 2861 mana_remove(gd, false); 2862 2863 return err; 2864 } 2865 2866 void mana_remove(struct gdma_dev *gd, bool suspending) 2867 { 2868 struct gdma_context *gc = gd->gdma_context; 2869 struct mana_context *ac = gd->driver_data; 2870 struct device *dev = gc->dev; 2871 struct net_device *ndev; 2872 int err; 2873 int i; 2874 2875 /* adev currently doesn't support suspending, always remove it */ 2876 if (gd->adev) 2877 remove_adev(gd); 2878 2879 for (i = 0; i < ac->num_ports; i++) { 2880 ndev = ac->ports[i]; 2881 if (!ndev) { 2882 if (i == 0) 2883 dev_err(dev, "No net device to remove\n"); 2884 goto out; 2885 } 2886 2887 /* All cleanup actions should stay after rtnl_lock(), otherwise 2888 * other functions may access partially cleaned up data. 2889 */ 2890 rtnl_lock(); 2891 2892 err = mana_detach(ndev, false); 2893 if (err) 2894 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 2895 i, err); 2896 2897 if (suspending) { 2898 /* No need to unregister the ndev. */ 2899 rtnl_unlock(); 2900 continue; 2901 } 2902 2903 unregister_netdevice(ndev); 2904 2905 rtnl_unlock(); 2906 2907 free_netdev(ndev); 2908 } 2909 2910 mana_destroy_eq(ac); 2911 out: 2912 mana_gd_deregister_device(gd); 2913 2914 if (suspending) 2915 return; 2916 2917 gd->driver_data = NULL; 2918 gd->gdma_context = NULL; 2919 kfree(ac); 2920 } 2921