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 = mtu + MANA_RXBUF_PAD + *headroom; 603 604 *datasize = ALIGN(mtu + ETH_HLEN, MANA_RX_DATA_ALIGN); 605 } 606 607 static int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu) 608 { 609 struct device *dev; 610 struct page *page; 611 dma_addr_t da; 612 int num_rxb; 613 void *va; 614 int i; 615 616 mana_get_rxbuf_cfg(new_mtu, &mpc->rxbpre_datasize, 617 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom); 618 619 dev = mpc->ac->gdma_dev->gdma_context->dev; 620 621 num_rxb = mpc->num_queues * RX_BUFFERS_PER_QUEUE; 622 623 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n"); 624 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL); 625 if (!mpc->rxbufs_pre) 626 goto error; 627 628 mpc->das_pre = kmalloc_array(num_rxb, sizeof(dma_addr_t), GFP_KERNEL); 629 if (!mpc->das_pre) 630 goto error; 631 632 mpc->rxbpre_total = 0; 633 634 for (i = 0; i < num_rxb; i++) { 635 if (mpc->rxbpre_alloc_size > PAGE_SIZE) { 636 va = netdev_alloc_frag(mpc->rxbpre_alloc_size); 637 if (!va) 638 goto error; 639 640 page = virt_to_head_page(va); 641 /* Check if the frag falls back to single page */ 642 if (compound_order(page) < 643 get_order(mpc->rxbpre_alloc_size)) { 644 put_page(page); 645 goto error; 646 } 647 } else { 648 page = dev_alloc_page(); 649 if (!page) 650 goto error; 651 652 va = page_to_virt(page); 653 } 654 655 da = dma_map_single(dev, va + mpc->rxbpre_headroom, 656 mpc->rxbpre_datasize, DMA_FROM_DEVICE); 657 if (dma_mapping_error(dev, da)) { 658 put_page(virt_to_head_page(va)); 659 goto error; 660 } 661 662 mpc->rxbufs_pre[i] = va; 663 mpc->das_pre[i] = da; 664 mpc->rxbpre_total = i + 1; 665 } 666 667 return 0; 668 669 error: 670 mana_pre_dealloc_rxbufs(mpc); 671 return -ENOMEM; 672 } 673 674 static int mana_change_mtu(struct net_device *ndev, int new_mtu) 675 { 676 struct mana_port_context *mpc = netdev_priv(ndev); 677 unsigned int old_mtu = ndev->mtu; 678 int err; 679 680 /* Pre-allocate buffers to prevent failure in mana_attach later */ 681 err = mana_pre_alloc_rxbufs(mpc, new_mtu); 682 if (err) { 683 netdev_err(ndev, "Insufficient memory for new MTU\n"); 684 return err; 685 } 686 687 err = mana_detach(ndev, false); 688 if (err) { 689 netdev_err(ndev, "mana_detach failed: %d\n", err); 690 goto out; 691 } 692 693 ndev->mtu = new_mtu; 694 695 err = mana_attach(ndev); 696 if (err) { 697 netdev_err(ndev, "mana_attach failed: %d\n", err); 698 ndev->mtu = old_mtu; 699 } 700 701 out: 702 mana_pre_dealloc_rxbufs(mpc); 703 return err; 704 } 705 706 static const struct net_device_ops mana_devops = { 707 .ndo_open = mana_open, 708 .ndo_stop = mana_close, 709 .ndo_select_queue = mana_select_queue, 710 .ndo_start_xmit = mana_start_xmit, 711 .ndo_validate_addr = eth_validate_addr, 712 .ndo_get_stats64 = mana_get_stats64, 713 .ndo_bpf = mana_bpf, 714 .ndo_xdp_xmit = mana_xdp_xmit, 715 .ndo_change_mtu = mana_change_mtu, 716 }; 717 718 static void mana_cleanup_port_context(struct mana_port_context *apc) 719 { 720 kfree(apc->rxqs); 721 apc->rxqs = NULL; 722 } 723 724 static int mana_init_port_context(struct mana_port_context *apc) 725 { 726 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 727 GFP_KERNEL); 728 729 return !apc->rxqs ? -ENOMEM : 0; 730 } 731 732 static int mana_send_request(struct mana_context *ac, void *in_buf, 733 u32 in_len, void *out_buf, u32 out_len) 734 { 735 struct gdma_context *gc = ac->gdma_dev->gdma_context; 736 struct gdma_resp_hdr *resp = out_buf; 737 struct gdma_req_hdr *req = in_buf; 738 struct device *dev = gc->dev; 739 static atomic_t activity_id; 740 int err; 741 742 req->dev_id = gc->mana.dev_id; 743 req->activity_id = atomic_inc_return(&activity_id); 744 745 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 746 out_buf); 747 if (err || resp->status) { 748 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 749 err, resp->status); 750 return err ? err : -EPROTO; 751 } 752 753 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 754 req->activity_id != resp->activity_id) { 755 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 756 req->dev_id.as_uint32, resp->dev_id.as_uint32, 757 req->activity_id, resp->activity_id); 758 return -EPROTO; 759 } 760 761 return 0; 762 } 763 764 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 765 const enum mana_command_code expected_code, 766 const u32 min_size) 767 { 768 if (resp_hdr->response.msg_type != expected_code) 769 return -EPROTO; 770 771 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 772 return -EPROTO; 773 774 if (resp_hdr->response.msg_size < min_size) 775 return -EPROTO; 776 777 return 0; 778 } 779 780 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 781 { 782 struct mana_register_hw_vport_resp resp = {}; 783 struct mana_register_hw_vport_req req = {}; 784 int err; 785 786 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 787 sizeof(req), sizeof(resp)); 788 req.attached_gfid = 1; 789 req.is_pf_default_vport = 1; 790 req.allow_all_ether_types = 1; 791 792 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 793 sizeof(resp)); 794 if (err) { 795 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 796 return err; 797 } 798 799 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 800 sizeof(resp)); 801 if (err || resp.hdr.status) { 802 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 803 err, resp.hdr.status); 804 return err ? err : -EPROTO; 805 } 806 807 apc->port_handle = resp.hw_vport_handle; 808 return 0; 809 } 810 811 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 812 { 813 struct mana_deregister_hw_vport_resp resp = {}; 814 struct mana_deregister_hw_vport_req req = {}; 815 int err; 816 817 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 818 sizeof(req), sizeof(resp)); 819 req.hw_vport_handle = apc->port_handle; 820 821 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 822 sizeof(resp)); 823 if (err) { 824 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 825 err); 826 return; 827 } 828 829 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 830 sizeof(resp)); 831 if (err || resp.hdr.status) 832 netdev_err(apc->ndev, 833 "Failed to deregister hw vPort: %d, 0x%x\n", 834 err, resp.hdr.status); 835 } 836 837 static int mana_pf_register_filter(struct mana_port_context *apc) 838 { 839 struct mana_register_filter_resp resp = {}; 840 struct mana_register_filter_req req = {}; 841 int err; 842 843 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 844 sizeof(req), sizeof(resp)); 845 req.vport = apc->port_handle; 846 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 847 848 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 849 sizeof(resp)); 850 if (err) { 851 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 852 return err; 853 } 854 855 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 856 sizeof(resp)); 857 if (err || resp.hdr.status) { 858 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 859 err, resp.hdr.status); 860 return err ? err : -EPROTO; 861 } 862 863 apc->pf_filter_handle = resp.filter_handle; 864 return 0; 865 } 866 867 static void mana_pf_deregister_filter(struct mana_port_context *apc) 868 { 869 struct mana_deregister_filter_resp resp = {}; 870 struct mana_deregister_filter_req req = {}; 871 int err; 872 873 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 874 sizeof(req), sizeof(resp)); 875 req.filter_handle = apc->pf_filter_handle; 876 877 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 878 sizeof(resp)); 879 if (err) { 880 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 881 err); 882 return; 883 } 884 885 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 886 sizeof(resp)); 887 if (err || resp.hdr.status) 888 netdev_err(apc->ndev, 889 "Failed to deregister filter: %d, 0x%x\n", 890 err, resp.hdr.status); 891 } 892 893 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 894 u32 proto_minor_ver, u32 proto_micro_ver, 895 u16 *max_num_vports) 896 { 897 struct gdma_context *gc = ac->gdma_dev->gdma_context; 898 struct mana_query_device_cfg_resp resp = {}; 899 struct mana_query_device_cfg_req req = {}; 900 struct device *dev = gc->dev; 901 int err = 0; 902 903 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 904 sizeof(req), sizeof(resp)); 905 906 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 907 908 req.proto_major_ver = proto_major_ver; 909 req.proto_minor_ver = proto_minor_ver; 910 req.proto_micro_ver = proto_micro_ver; 911 912 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 913 if (err) { 914 dev_err(dev, "Failed to query config: %d", err); 915 return err; 916 } 917 918 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 919 sizeof(resp)); 920 if (err || resp.hdr.status) { 921 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 922 resp.hdr.status); 923 if (!err) 924 err = -EPROTO; 925 return err; 926 } 927 928 *max_num_vports = resp.max_num_vports; 929 930 if (resp.hdr.response.msg_version == GDMA_MESSAGE_V2) 931 gc->adapter_mtu = resp.adapter_mtu; 932 else 933 gc->adapter_mtu = ETH_FRAME_LEN; 934 935 return 0; 936 } 937 938 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 939 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 940 { 941 struct mana_query_vport_cfg_resp resp = {}; 942 struct mana_query_vport_cfg_req req = {}; 943 int err; 944 945 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 946 sizeof(req), sizeof(resp)); 947 948 req.vport_index = vport_index; 949 950 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 951 sizeof(resp)); 952 if (err) 953 return err; 954 955 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 956 sizeof(resp)); 957 if (err) 958 return err; 959 960 if (resp.hdr.status) 961 return -EPROTO; 962 963 *max_sq = resp.max_num_sq; 964 *max_rq = resp.max_num_rq; 965 *num_indir_entry = resp.num_indirection_ent; 966 967 apc->port_handle = resp.vport; 968 ether_addr_copy(apc->mac_addr, resp.mac_addr); 969 970 return 0; 971 } 972 973 void mana_uncfg_vport(struct mana_port_context *apc) 974 { 975 mutex_lock(&apc->vport_mutex); 976 apc->vport_use_count--; 977 WARN_ON(apc->vport_use_count < 0); 978 mutex_unlock(&apc->vport_mutex); 979 } 980 EXPORT_SYMBOL_NS(mana_uncfg_vport, NET_MANA); 981 982 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 983 u32 doorbell_pg_id) 984 { 985 struct mana_config_vport_resp resp = {}; 986 struct mana_config_vport_req req = {}; 987 int err; 988 989 /* This function is used to program the Ethernet port in the hardware 990 * table. It can be called from the Ethernet driver or the RDMA driver. 991 * 992 * For Ethernet usage, the hardware supports only one active user on a 993 * physical port. The driver checks on the port usage before programming 994 * the hardware when creating the RAW QP (RDMA driver) or exposing the 995 * device to kernel NET layer (Ethernet driver). 996 * 997 * Because the RDMA driver doesn't know in advance which QP type the 998 * user will create, it exposes the device with all its ports. The user 999 * may not be able to create RAW QP on a port if this port is already 1000 * in used by the Ethernet driver from the kernel. 1001 * 1002 * This physical port limitation only applies to the RAW QP. For RC QP, 1003 * the hardware doesn't have this limitation. The user can create RC 1004 * QPs on a physical port up to the hardware limits independent of the 1005 * Ethernet usage on the same port. 1006 */ 1007 mutex_lock(&apc->vport_mutex); 1008 if (apc->vport_use_count > 0) { 1009 mutex_unlock(&apc->vport_mutex); 1010 return -EBUSY; 1011 } 1012 apc->vport_use_count++; 1013 mutex_unlock(&apc->vport_mutex); 1014 1015 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1016 sizeof(req), sizeof(resp)); 1017 req.vport = apc->port_handle; 1018 req.pdid = protection_dom_id; 1019 req.doorbell_pageid = doorbell_pg_id; 1020 1021 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1022 sizeof(resp)); 1023 if (err) { 1024 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1025 goto out; 1026 } 1027 1028 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1029 sizeof(resp)); 1030 if (err || resp.hdr.status) { 1031 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1032 err, resp.hdr.status); 1033 if (!err) 1034 err = -EPROTO; 1035 1036 goto out; 1037 } 1038 1039 apc->tx_shortform_allowed = resp.short_form_allowed; 1040 apc->tx_vp_offset = resp.tx_vport_offset; 1041 1042 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 1043 apc->port_handle, protection_dom_id, doorbell_pg_id); 1044 out: 1045 if (err) 1046 mana_uncfg_vport(apc); 1047 1048 return err; 1049 } 1050 EXPORT_SYMBOL_NS(mana_cfg_vport, NET_MANA); 1051 1052 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1053 enum TRI_STATE rx, 1054 bool update_default_rxobj, bool update_key, 1055 bool update_tab) 1056 { 1057 u16 num_entries = MANA_INDIRECT_TABLE_SIZE; 1058 struct mana_cfg_rx_steer_req_v2 *req; 1059 struct mana_cfg_rx_steer_resp resp = {}; 1060 struct net_device *ndev = apc->ndev; 1061 mana_handle_t *req_indir_tab; 1062 u32 req_buf_size; 1063 int err; 1064 1065 req_buf_size = sizeof(*req) + sizeof(mana_handle_t) * num_entries; 1066 req = kzalloc(req_buf_size, GFP_KERNEL); 1067 if (!req) 1068 return -ENOMEM; 1069 1070 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1071 sizeof(resp)); 1072 1073 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1074 1075 req->vport = apc->port_handle; 1076 req->num_indir_entries = num_entries; 1077 req->indir_tab_offset = sizeof(*req); 1078 req->rx_enable = rx; 1079 req->rss_enable = apc->rss_state; 1080 req->update_default_rxobj = update_default_rxobj; 1081 req->update_hashkey = update_key; 1082 req->update_indir_tab = update_tab; 1083 req->default_rxobj = apc->default_rxobj; 1084 req->cqe_coalescing_enable = 0; 1085 1086 if (update_key) 1087 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1088 1089 if (update_tab) { 1090 req_indir_tab = (mana_handle_t *)(req + 1); 1091 memcpy(req_indir_tab, apc->rxobj_table, 1092 req->num_indir_entries * sizeof(mana_handle_t)); 1093 } 1094 1095 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1096 sizeof(resp)); 1097 if (err) { 1098 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1099 goto out; 1100 } 1101 1102 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1103 sizeof(resp)); 1104 if (err) { 1105 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1106 goto out; 1107 } 1108 1109 if (resp.hdr.status) { 1110 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1111 resp.hdr.status); 1112 err = -EPROTO; 1113 } 1114 1115 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1116 apc->port_handle, num_entries); 1117 out: 1118 kfree(req); 1119 return err; 1120 } 1121 1122 int mana_create_wq_obj(struct mana_port_context *apc, 1123 mana_handle_t vport, 1124 u32 wq_type, struct mana_obj_spec *wq_spec, 1125 struct mana_obj_spec *cq_spec, 1126 mana_handle_t *wq_obj) 1127 { 1128 struct mana_create_wqobj_resp resp = {}; 1129 struct mana_create_wqobj_req req = {}; 1130 struct net_device *ndev = apc->ndev; 1131 int err; 1132 1133 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1134 sizeof(req), sizeof(resp)); 1135 req.vport = vport; 1136 req.wq_type = wq_type; 1137 req.wq_gdma_region = wq_spec->gdma_region; 1138 req.cq_gdma_region = cq_spec->gdma_region; 1139 req.wq_size = wq_spec->queue_size; 1140 req.cq_size = cq_spec->queue_size; 1141 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1142 req.cq_parent_qid = cq_spec->attached_eq; 1143 1144 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1145 sizeof(resp)); 1146 if (err) { 1147 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1148 goto out; 1149 } 1150 1151 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1152 sizeof(resp)); 1153 if (err || resp.hdr.status) { 1154 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1155 resp.hdr.status); 1156 if (!err) 1157 err = -EPROTO; 1158 goto out; 1159 } 1160 1161 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1162 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1163 err = -EPROTO; 1164 goto out; 1165 } 1166 1167 *wq_obj = resp.wq_obj; 1168 wq_spec->queue_index = resp.wq_id; 1169 cq_spec->queue_index = resp.cq_id; 1170 1171 return 0; 1172 out: 1173 return err; 1174 } 1175 EXPORT_SYMBOL_NS(mana_create_wq_obj, NET_MANA); 1176 1177 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1178 mana_handle_t wq_obj) 1179 { 1180 struct mana_destroy_wqobj_resp resp = {}; 1181 struct mana_destroy_wqobj_req req = {}; 1182 struct net_device *ndev = apc->ndev; 1183 int err; 1184 1185 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1186 sizeof(req), sizeof(resp)); 1187 req.wq_type = wq_type; 1188 req.wq_obj_handle = wq_obj; 1189 1190 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1191 sizeof(resp)); 1192 if (err) { 1193 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1194 return; 1195 } 1196 1197 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1198 sizeof(resp)); 1199 if (err || resp.hdr.status) 1200 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1201 resp.hdr.status); 1202 } 1203 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, NET_MANA); 1204 1205 static void mana_destroy_eq(struct mana_context *ac) 1206 { 1207 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1208 struct gdma_queue *eq; 1209 int i; 1210 1211 if (!ac->eqs) 1212 return; 1213 1214 for (i = 0; i < gc->max_num_queues; i++) { 1215 eq = ac->eqs[i].eq; 1216 if (!eq) 1217 continue; 1218 1219 mana_gd_destroy_queue(gc, eq); 1220 } 1221 1222 kfree(ac->eqs); 1223 ac->eqs = NULL; 1224 } 1225 1226 static int mana_create_eq(struct mana_context *ac) 1227 { 1228 struct gdma_dev *gd = ac->gdma_dev; 1229 struct gdma_context *gc = gd->gdma_context; 1230 struct gdma_queue_spec spec = {}; 1231 int err; 1232 int i; 1233 1234 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq), 1235 GFP_KERNEL); 1236 if (!ac->eqs) 1237 return -ENOMEM; 1238 1239 spec.type = GDMA_EQ; 1240 spec.monitor_avl_buf = false; 1241 spec.queue_size = EQ_SIZE; 1242 spec.eq.callback = NULL; 1243 spec.eq.context = ac->eqs; 1244 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1245 1246 for (i = 0; i < gc->max_num_queues; i++) { 1247 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1248 if (err) 1249 goto out; 1250 } 1251 1252 return 0; 1253 out: 1254 mana_destroy_eq(ac); 1255 return err; 1256 } 1257 1258 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1259 { 1260 struct mana_fence_rq_resp resp = {}; 1261 struct mana_fence_rq_req req = {}; 1262 int err; 1263 1264 init_completion(&rxq->fence_event); 1265 1266 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1267 sizeof(req), sizeof(resp)); 1268 req.wq_obj_handle = rxq->rxobj; 1269 1270 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1271 sizeof(resp)); 1272 if (err) { 1273 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1274 rxq->rxq_idx, err); 1275 return err; 1276 } 1277 1278 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1279 if (err || resp.hdr.status) { 1280 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1281 rxq->rxq_idx, err, resp.hdr.status); 1282 if (!err) 1283 err = -EPROTO; 1284 1285 return err; 1286 } 1287 1288 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1289 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1290 rxq->rxq_idx); 1291 return -ETIMEDOUT; 1292 } 1293 1294 return 0; 1295 } 1296 1297 static void mana_fence_rqs(struct mana_port_context *apc) 1298 { 1299 unsigned int rxq_idx; 1300 struct mana_rxq *rxq; 1301 int err; 1302 1303 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1304 rxq = apc->rxqs[rxq_idx]; 1305 err = mana_fence_rq(apc, rxq); 1306 1307 /* In case of any error, use sleep instead. */ 1308 if (err) 1309 msleep(100); 1310 } 1311 } 1312 1313 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1314 { 1315 u32 used_space_old; 1316 u32 used_space_new; 1317 1318 used_space_old = wq->head - wq->tail; 1319 used_space_new = wq->head - (wq->tail + num_units); 1320 1321 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1322 return -ERANGE; 1323 1324 wq->tail += num_units; 1325 return 0; 1326 } 1327 1328 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1329 { 1330 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1331 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1332 struct device *dev = gc->dev; 1333 int hsg, i; 1334 1335 /* Number of SGEs of linear part */ 1336 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1337 1338 for (i = 0; i < hsg; i++) 1339 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1340 DMA_TO_DEVICE); 1341 1342 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1343 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1344 DMA_TO_DEVICE); 1345 } 1346 1347 static void mana_poll_tx_cq(struct mana_cq *cq) 1348 { 1349 struct gdma_comp *completions = cq->gdma_comp_buf; 1350 struct gdma_posted_wqe_info *wqe_info; 1351 unsigned int pkt_transmitted = 0; 1352 unsigned int wqe_unit_cnt = 0; 1353 struct mana_txq *txq = cq->txq; 1354 struct mana_port_context *apc; 1355 struct netdev_queue *net_txq; 1356 struct gdma_queue *gdma_wq; 1357 unsigned int avail_space; 1358 struct net_device *ndev; 1359 struct sk_buff *skb; 1360 bool txq_stopped; 1361 int comp_read; 1362 int i; 1363 1364 ndev = txq->ndev; 1365 apc = netdev_priv(ndev); 1366 1367 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1368 CQE_POLLING_BUFFER); 1369 1370 if (comp_read < 1) 1371 return; 1372 1373 for (i = 0; i < comp_read; i++) { 1374 struct mana_tx_comp_oob *cqe_oob; 1375 1376 if (WARN_ON_ONCE(!completions[i].is_sq)) 1377 return; 1378 1379 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1380 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1381 MANA_CQE_COMPLETION)) 1382 return; 1383 1384 switch (cqe_oob->cqe_hdr.cqe_type) { 1385 case CQE_TX_OKAY: 1386 break; 1387 1388 case CQE_TX_SA_DROP: 1389 case CQE_TX_MTU_DROP: 1390 case CQE_TX_INVALID_OOB: 1391 case CQE_TX_INVALID_ETH_TYPE: 1392 case CQE_TX_HDR_PROCESSING_ERROR: 1393 case CQE_TX_VF_DISABLED: 1394 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1395 case CQE_TX_VPORT_DISABLED: 1396 case CQE_TX_VLAN_TAGGING_VIOLATION: 1397 if (net_ratelimit()) 1398 netdev_err(ndev, "TX: CQE error %d\n", 1399 cqe_oob->cqe_hdr.cqe_type); 1400 1401 apc->eth_stats.tx_cqe_err++; 1402 break; 1403 1404 default: 1405 /* If the CQE type is unknown, log an error, 1406 * and still free the SKB, update tail, etc. 1407 */ 1408 if (net_ratelimit()) 1409 netdev_err(ndev, "TX: unknown CQE type %d\n", 1410 cqe_oob->cqe_hdr.cqe_type); 1411 1412 apc->eth_stats.tx_cqe_unknown_type++; 1413 break; 1414 } 1415 1416 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1417 return; 1418 1419 skb = skb_dequeue(&txq->pending_skbs); 1420 if (WARN_ON_ONCE(!skb)) 1421 return; 1422 1423 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1424 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1425 1426 mana_unmap_skb(skb, apc); 1427 1428 napi_consume_skb(skb, cq->budget); 1429 1430 pkt_transmitted++; 1431 } 1432 1433 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1434 return; 1435 1436 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1437 1438 gdma_wq = txq->gdma_sq; 1439 avail_space = mana_gd_wq_avail_space(gdma_wq); 1440 1441 /* Ensure tail updated before checking q stop */ 1442 smp_mb(); 1443 1444 net_txq = txq->net_txq; 1445 txq_stopped = netif_tx_queue_stopped(net_txq); 1446 1447 /* Ensure checking txq_stopped before apc->port_is_up. */ 1448 smp_rmb(); 1449 1450 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1451 netif_tx_wake_queue(net_txq); 1452 apc->eth_stats.wake_queue++; 1453 } 1454 1455 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1456 WARN_ON_ONCE(1); 1457 1458 cq->work_done = pkt_transmitted; 1459 } 1460 1461 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1462 { 1463 struct mana_recv_buf_oob *recv_buf_oob; 1464 u32 curr_index; 1465 int err; 1466 1467 curr_index = rxq->buf_index++; 1468 if (rxq->buf_index == rxq->num_rx_buf) 1469 rxq->buf_index = 0; 1470 1471 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1472 1473 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1474 &recv_buf_oob->wqe_inf); 1475 if (WARN_ON_ONCE(err)) 1476 return; 1477 1478 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1479 } 1480 1481 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1482 uint pkt_len, struct xdp_buff *xdp) 1483 { 1484 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1485 1486 if (!skb) 1487 return NULL; 1488 1489 if (xdp->data_hard_start) { 1490 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1491 skb_put(skb, xdp->data_end - xdp->data); 1492 return skb; 1493 } 1494 1495 skb_reserve(skb, rxq->headroom); 1496 skb_put(skb, pkt_len); 1497 1498 return skb; 1499 } 1500 1501 static void mana_rx_skb(void *buf_va, bool from_pool, 1502 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) 1503 { 1504 struct mana_stats_rx *rx_stats = &rxq->stats; 1505 struct net_device *ndev = rxq->ndev; 1506 uint pkt_len = cqe->ppi[0].pkt_len; 1507 u16 rxq_idx = rxq->rxq_idx; 1508 struct napi_struct *napi; 1509 struct xdp_buff xdp = {}; 1510 struct sk_buff *skb; 1511 u32 hash_value; 1512 u32 act; 1513 1514 rxq->rx_cq.work_done++; 1515 napi = &rxq->rx_cq.napi; 1516 1517 if (!buf_va) { 1518 ++ndev->stats.rx_dropped; 1519 return; 1520 } 1521 1522 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1523 1524 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1525 return; 1526 1527 if (act != XDP_PASS && act != XDP_TX) 1528 goto drop_xdp; 1529 1530 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1531 1532 if (!skb) 1533 goto drop; 1534 1535 if (from_pool) 1536 skb_mark_for_recycle(skb); 1537 1538 skb->dev = napi->dev; 1539 1540 skb->protocol = eth_type_trans(skb, ndev); 1541 skb_checksum_none_assert(skb); 1542 skb_record_rx_queue(skb, rxq_idx); 1543 1544 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1545 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1546 skb->ip_summed = CHECKSUM_UNNECESSARY; 1547 } 1548 1549 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1550 hash_value = cqe->ppi[0].pkt_hash; 1551 1552 if (cqe->rx_hashtype & MANA_HASH_L4) 1553 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1554 else 1555 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1556 } 1557 1558 if (cqe->rx_vlantag_present) { 1559 u16 vlan_tci = cqe->rx_vlan_id; 1560 1561 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1562 } 1563 1564 u64_stats_update_begin(&rx_stats->syncp); 1565 rx_stats->packets++; 1566 rx_stats->bytes += pkt_len; 1567 1568 if (act == XDP_TX) 1569 rx_stats->xdp_tx++; 1570 u64_stats_update_end(&rx_stats->syncp); 1571 1572 if (act == XDP_TX) { 1573 skb_set_queue_mapping(skb, rxq_idx); 1574 mana_xdp_tx(skb, ndev); 1575 return; 1576 } 1577 1578 napi_gro_receive(napi, skb); 1579 1580 return; 1581 1582 drop_xdp: 1583 u64_stats_update_begin(&rx_stats->syncp); 1584 rx_stats->xdp_drop++; 1585 u64_stats_update_end(&rx_stats->syncp); 1586 1587 drop: 1588 if (from_pool) { 1589 page_pool_recycle_direct(rxq->page_pool, 1590 virt_to_head_page(buf_va)); 1591 } else { 1592 WARN_ON_ONCE(rxq->xdp_save_va); 1593 /* Save for reuse */ 1594 rxq->xdp_save_va = buf_va; 1595 } 1596 1597 ++ndev->stats.rx_dropped; 1598 1599 return; 1600 } 1601 1602 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 1603 dma_addr_t *da, bool *from_pool, bool is_napi) 1604 { 1605 struct page *page; 1606 void *va; 1607 1608 *from_pool = false; 1609 1610 /* Reuse XDP dropped page if available */ 1611 if (rxq->xdp_save_va) { 1612 va = rxq->xdp_save_va; 1613 rxq->xdp_save_va = NULL; 1614 } else if (rxq->alloc_size > PAGE_SIZE) { 1615 if (is_napi) 1616 va = napi_alloc_frag(rxq->alloc_size); 1617 else 1618 va = netdev_alloc_frag(rxq->alloc_size); 1619 1620 if (!va) 1621 return NULL; 1622 1623 page = virt_to_head_page(va); 1624 /* Check if the frag falls back to single page */ 1625 if (compound_order(page) < get_order(rxq->alloc_size)) { 1626 put_page(page); 1627 return NULL; 1628 } 1629 } else { 1630 page = page_pool_dev_alloc_pages(rxq->page_pool); 1631 if (!page) 1632 return NULL; 1633 1634 *from_pool = true; 1635 va = page_to_virt(page); 1636 } 1637 1638 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 1639 DMA_FROM_DEVICE); 1640 if (dma_mapping_error(dev, *da)) { 1641 if (*from_pool) 1642 page_pool_put_full_page(rxq->page_pool, page, false); 1643 else 1644 put_page(virt_to_head_page(va)); 1645 1646 return NULL; 1647 } 1648 1649 return va; 1650 } 1651 1652 /* Allocate frag for rx buffer, and save the old buf */ 1653 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 1654 struct mana_recv_buf_oob *rxoob, void **old_buf, 1655 bool *old_fp) 1656 { 1657 bool from_pool; 1658 dma_addr_t da; 1659 void *va; 1660 1661 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, true); 1662 if (!va) 1663 return; 1664 1665 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 1666 DMA_FROM_DEVICE); 1667 *old_buf = rxoob->buf_va; 1668 *old_fp = rxoob->from_pool; 1669 1670 rxoob->buf_va = va; 1671 rxoob->sgl[0].address = da; 1672 rxoob->from_pool = from_pool; 1673 } 1674 1675 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1676 struct gdma_comp *cqe) 1677 { 1678 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1679 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1680 struct net_device *ndev = rxq->ndev; 1681 struct mana_recv_buf_oob *rxbuf_oob; 1682 struct mana_port_context *apc; 1683 struct device *dev = gc->dev; 1684 void *old_buf = NULL; 1685 u32 curr, pktlen; 1686 bool old_fp; 1687 1688 apc = netdev_priv(ndev); 1689 1690 switch (oob->cqe_hdr.cqe_type) { 1691 case CQE_RX_OKAY: 1692 break; 1693 1694 case CQE_RX_TRUNCATED: 1695 ++ndev->stats.rx_dropped; 1696 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1697 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1698 goto drop; 1699 1700 case CQE_RX_COALESCED_4: 1701 netdev_err(ndev, "RX coalescing is unsupported\n"); 1702 apc->eth_stats.rx_coalesced_err++; 1703 return; 1704 1705 case CQE_RX_OBJECT_FENCE: 1706 complete(&rxq->fence_event); 1707 return; 1708 1709 default: 1710 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1711 oob->cqe_hdr.cqe_type); 1712 apc->eth_stats.rx_cqe_unknown_type++; 1713 return; 1714 } 1715 1716 pktlen = oob->ppi[0].pkt_len; 1717 1718 if (pktlen == 0) { 1719 /* data packets should never have packetlength of zero */ 1720 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1721 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1722 return; 1723 } 1724 1725 curr = rxq->buf_index; 1726 rxbuf_oob = &rxq->rx_oobs[curr]; 1727 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1728 1729 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 1730 1731 /* Unsuccessful refill will have old_buf == NULL. 1732 * In this case, mana_rx_skb() will drop the packet. 1733 */ 1734 mana_rx_skb(old_buf, old_fp, oob, rxq); 1735 1736 drop: 1737 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1738 1739 mana_post_pkt_rxq(rxq); 1740 } 1741 1742 static void mana_poll_rx_cq(struct mana_cq *cq) 1743 { 1744 struct gdma_comp *comp = cq->gdma_comp_buf; 1745 struct mana_rxq *rxq = cq->rxq; 1746 int comp_read, i; 1747 1748 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1749 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1750 1751 rxq->xdp_flush = false; 1752 1753 for (i = 0; i < comp_read; i++) { 1754 if (WARN_ON_ONCE(comp[i].is_sq)) 1755 return; 1756 1757 /* verify recv cqe references the right rxq */ 1758 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1759 return; 1760 1761 mana_process_rx_cqe(rxq, cq, &comp[i]); 1762 } 1763 1764 if (comp_read > 0) { 1765 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1766 1767 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 1768 } 1769 1770 if (rxq->xdp_flush) 1771 xdp_do_flush(); 1772 } 1773 1774 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1775 { 1776 struct mana_cq *cq = context; 1777 u8 arm_bit; 1778 int w; 1779 1780 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1781 1782 if (cq->type == MANA_CQ_TYPE_RX) 1783 mana_poll_rx_cq(cq); 1784 else 1785 mana_poll_tx_cq(cq); 1786 1787 w = cq->work_done; 1788 1789 if (w < cq->budget && 1790 napi_complete_done(&cq->napi, w)) { 1791 arm_bit = SET_ARM_BIT; 1792 } else { 1793 arm_bit = 0; 1794 } 1795 1796 mana_gd_ring_cq(gdma_queue, arm_bit); 1797 1798 return w; 1799 } 1800 1801 static int mana_poll(struct napi_struct *napi, int budget) 1802 { 1803 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1804 int w; 1805 1806 cq->work_done = 0; 1807 cq->budget = budget; 1808 1809 w = mana_cq_handler(cq, cq->gdma_cq); 1810 1811 return min(w, budget); 1812 } 1813 1814 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1815 { 1816 struct mana_cq *cq = context; 1817 1818 napi_schedule_irqoff(&cq->napi); 1819 } 1820 1821 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1822 { 1823 struct gdma_dev *gd = apc->ac->gdma_dev; 1824 1825 if (!cq->gdma_cq) 1826 return; 1827 1828 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1829 } 1830 1831 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1832 { 1833 struct gdma_dev *gd = apc->ac->gdma_dev; 1834 1835 if (!txq->gdma_sq) 1836 return; 1837 1838 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1839 } 1840 1841 static void mana_destroy_txq(struct mana_port_context *apc) 1842 { 1843 struct napi_struct *napi; 1844 int i; 1845 1846 if (!apc->tx_qp) 1847 return; 1848 1849 for (i = 0; i < apc->num_queues; i++) { 1850 napi = &apc->tx_qp[i].tx_cq.napi; 1851 napi_synchronize(napi); 1852 napi_disable(napi); 1853 netif_napi_del(napi); 1854 1855 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1856 1857 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1858 1859 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1860 } 1861 1862 kfree(apc->tx_qp); 1863 apc->tx_qp = NULL; 1864 } 1865 1866 static int mana_create_txq(struct mana_port_context *apc, 1867 struct net_device *net) 1868 { 1869 struct mana_context *ac = apc->ac; 1870 struct gdma_dev *gd = ac->gdma_dev; 1871 struct mana_obj_spec wq_spec; 1872 struct mana_obj_spec cq_spec; 1873 struct gdma_queue_spec spec; 1874 struct gdma_context *gc; 1875 struct mana_txq *txq; 1876 struct mana_cq *cq; 1877 u32 txq_size; 1878 u32 cq_size; 1879 int err; 1880 int i; 1881 1882 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1883 GFP_KERNEL); 1884 if (!apc->tx_qp) 1885 return -ENOMEM; 1886 1887 /* The minimum size of the WQE is 32 bytes, hence 1888 * MAX_SEND_BUFFERS_PER_QUEUE represents the maximum number of WQEs 1889 * the SQ can store. This value is then used to size other queues 1890 * to prevent overflow. 1891 */ 1892 txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32; 1893 BUILD_BUG_ON(!PAGE_ALIGNED(txq_size)); 1894 1895 cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE; 1896 cq_size = PAGE_ALIGN(cq_size); 1897 1898 gc = gd->gdma_context; 1899 1900 for (i = 0; i < apc->num_queues; i++) { 1901 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1902 1903 /* Create SQ */ 1904 txq = &apc->tx_qp[i].txq; 1905 1906 u64_stats_init(&txq->stats.syncp); 1907 txq->ndev = net; 1908 txq->net_txq = netdev_get_tx_queue(net, i); 1909 txq->vp_offset = apc->tx_vp_offset; 1910 skb_queue_head_init(&txq->pending_skbs); 1911 1912 memset(&spec, 0, sizeof(spec)); 1913 spec.type = GDMA_SQ; 1914 spec.monitor_avl_buf = true; 1915 spec.queue_size = txq_size; 1916 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 1917 if (err) 1918 goto out; 1919 1920 /* Create SQ's CQ */ 1921 cq = &apc->tx_qp[i].tx_cq; 1922 cq->type = MANA_CQ_TYPE_TX; 1923 1924 cq->txq = txq; 1925 1926 memset(&spec, 0, sizeof(spec)); 1927 spec.type = GDMA_CQ; 1928 spec.monitor_avl_buf = false; 1929 spec.queue_size = cq_size; 1930 spec.cq.callback = mana_schedule_napi; 1931 spec.cq.parent_eq = ac->eqs[i].eq; 1932 spec.cq.context = cq; 1933 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 1934 if (err) 1935 goto out; 1936 1937 memset(&wq_spec, 0, sizeof(wq_spec)); 1938 memset(&cq_spec, 0, sizeof(cq_spec)); 1939 1940 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 1941 wq_spec.queue_size = txq->gdma_sq->queue_size; 1942 1943 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 1944 cq_spec.queue_size = cq->gdma_cq->queue_size; 1945 cq_spec.modr_ctx_id = 0; 1946 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 1947 1948 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 1949 &wq_spec, &cq_spec, 1950 &apc->tx_qp[i].tx_object); 1951 1952 if (err) 1953 goto out; 1954 1955 txq->gdma_sq->id = wq_spec.queue_index; 1956 cq->gdma_cq->id = cq_spec.queue_index; 1957 1958 txq->gdma_sq->mem_info.dma_region_handle = 1959 GDMA_INVALID_DMA_REGION; 1960 cq->gdma_cq->mem_info.dma_region_handle = 1961 GDMA_INVALID_DMA_REGION; 1962 1963 txq->gdma_txq_id = txq->gdma_sq->id; 1964 1965 cq->gdma_id = cq->gdma_cq->id; 1966 1967 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 1968 err = -EINVAL; 1969 goto out; 1970 } 1971 1972 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 1973 1974 netif_napi_add_tx(net, &cq->napi, mana_poll); 1975 napi_enable(&cq->napi); 1976 1977 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 1978 } 1979 1980 return 0; 1981 out: 1982 mana_destroy_txq(apc); 1983 return err; 1984 } 1985 1986 static void mana_destroy_rxq(struct mana_port_context *apc, 1987 struct mana_rxq *rxq, bool validate_state) 1988 1989 { 1990 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1991 struct mana_recv_buf_oob *rx_oob; 1992 struct device *dev = gc->dev; 1993 struct napi_struct *napi; 1994 struct page *page; 1995 int i; 1996 1997 if (!rxq) 1998 return; 1999 2000 napi = &rxq->rx_cq.napi; 2001 2002 if (validate_state) 2003 napi_synchronize(napi); 2004 2005 napi_disable(napi); 2006 2007 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2008 2009 netif_napi_del(napi); 2010 2011 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2012 2013 mana_deinit_cq(apc, &rxq->rx_cq); 2014 2015 if (rxq->xdp_save_va) 2016 put_page(virt_to_head_page(rxq->xdp_save_va)); 2017 2018 for (i = 0; i < rxq->num_rx_buf; i++) { 2019 rx_oob = &rxq->rx_oobs[i]; 2020 2021 if (!rx_oob->buf_va) 2022 continue; 2023 2024 dma_unmap_single(dev, rx_oob->sgl[0].address, 2025 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2026 2027 page = virt_to_head_page(rx_oob->buf_va); 2028 2029 if (rx_oob->from_pool) 2030 page_pool_put_full_page(rxq->page_pool, page, false); 2031 else 2032 put_page(page); 2033 2034 rx_oob->buf_va = NULL; 2035 } 2036 2037 page_pool_destroy(rxq->page_pool); 2038 2039 if (rxq->gdma_rq) 2040 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2041 2042 kfree(rxq); 2043 } 2044 2045 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2046 struct mana_rxq *rxq, struct device *dev) 2047 { 2048 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2049 bool from_pool = false; 2050 dma_addr_t da; 2051 void *va; 2052 2053 if (mpc->rxbufs_pre) 2054 va = mana_get_rxbuf_pre(rxq, &da); 2055 else 2056 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, false); 2057 2058 if (!va) 2059 return -ENOMEM; 2060 2061 rx_oob->buf_va = va; 2062 rx_oob->from_pool = from_pool; 2063 2064 rx_oob->sgl[0].address = da; 2065 rx_oob->sgl[0].size = rxq->datasize; 2066 rx_oob->sgl[0].mem_key = mem_key; 2067 2068 return 0; 2069 } 2070 2071 #define MANA_WQE_HEADER_SIZE 16 2072 #define MANA_WQE_SGE_SIZE 16 2073 2074 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2075 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2076 { 2077 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2078 struct mana_recv_buf_oob *rx_oob; 2079 struct device *dev = gc->dev; 2080 u32 buf_idx; 2081 int ret; 2082 2083 WARN_ON(rxq->datasize == 0); 2084 2085 *rxq_size = 0; 2086 *cq_size = 0; 2087 2088 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2089 rx_oob = &rxq->rx_oobs[buf_idx]; 2090 memset(rx_oob, 0, sizeof(*rx_oob)); 2091 2092 rx_oob->num_sge = 1; 2093 2094 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2095 dev); 2096 if (ret) 2097 return ret; 2098 2099 rx_oob->wqe_req.sgl = rx_oob->sgl; 2100 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2101 rx_oob->wqe_req.inline_oob_size = 0; 2102 rx_oob->wqe_req.inline_oob_data = NULL; 2103 rx_oob->wqe_req.flags = 0; 2104 rx_oob->wqe_req.client_data_unit = 0; 2105 2106 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2107 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2108 *cq_size += COMP_ENTRY_SIZE; 2109 } 2110 2111 return 0; 2112 } 2113 2114 static int mana_push_wqe(struct mana_rxq *rxq) 2115 { 2116 struct mana_recv_buf_oob *rx_oob; 2117 u32 buf_idx; 2118 int err; 2119 2120 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2121 rx_oob = &rxq->rx_oobs[buf_idx]; 2122 2123 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2124 &rx_oob->wqe_inf); 2125 if (err) 2126 return -ENOSPC; 2127 } 2128 2129 return 0; 2130 } 2131 2132 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2133 { 2134 struct page_pool_params pprm = {}; 2135 int ret; 2136 2137 pprm.pool_size = RX_BUFFERS_PER_QUEUE; 2138 pprm.nid = gc->numa_node; 2139 pprm.napi = &rxq->rx_cq.napi; 2140 2141 rxq->page_pool = page_pool_create(&pprm); 2142 2143 if (IS_ERR(rxq->page_pool)) { 2144 ret = PTR_ERR(rxq->page_pool); 2145 rxq->page_pool = NULL; 2146 return ret; 2147 } 2148 2149 return 0; 2150 } 2151 2152 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2153 u32 rxq_idx, struct mana_eq *eq, 2154 struct net_device *ndev) 2155 { 2156 struct gdma_dev *gd = apc->ac->gdma_dev; 2157 struct mana_obj_spec wq_spec; 2158 struct mana_obj_spec cq_spec; 2159 struct gdma_queue_spec spec; 2160 struct mana_cq *cq = NULL; 2161 struct gdma_context *gc; 2162 u32 cq_size, rq_size; 2163 struct mana_rxq *rxq; 2164 int err; 2165 2166 gc = gd->gdma_context; 2167 2168 rxq = kzalloc(struct_size(rxq, rx_oobs, RX_BUFFERS_PER_QUEUE), 2169 GFP_KERNEL); 2170 if (!rxq) 2171 return NULL; 2172 2173 rxq->ndev = ndev; 2174 rxq->num_rx_buf = RX_BUFFERS_PER_QUEUE; 2175 rxq->rxq_idx = rxq_idx; 2176 rxq->rxobj = INVALID_MANA_HANDLE; 2177 2178 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2179 &rxq->headroom); 2180 2181 /* Create page pool for RX queue */ 2182 err = mana_create_page_pool(rxq, gc); 2183 if (err) { 2184 netdev_err(ndev, "Create page pool err:%d\n", err); 2185 goto out; 2186 } 2187 2188 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2189 if (err) 2190 goto out; 2191 2192 rq_size = PAGE_ALIGN(rq_size); 2193 cq_size = PAGE_ALIGN(cq_size); 2194 2195 /* Create RQ */ 2196 memset(&spec, 0, sizeof(spec)); 2197 spec.type = GDMA_RQ; 2198 spec.monitor_avl_buf = true; 2199 spec.queue_size = rq_size; 2200 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2201 if (err) 2202 goto out; 2203 2204 /* Create RQ's CQ */ 2205 cq = &rxq->rx_cq; 2206 cq->type = MANA_CQ_TYPE_RX; 2207 cq->rxq = rxq; 2208 2209 memset(&spec, 0, sizeof(spec)); 2210 spec.type = GDMA_CQ; 2211 spec.monitor_avl_buf = false; 2212 spec.queue_size = cq_size; 2213 spec.cq.callback = mana_schedule_napi; 2214 spec.cq.parent_eq = eq->eq; 2215 spec.cq.context = cq; 2216 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2217 if (err) 2218 goto out; 2219 2220 memset(&wq_spec, 0, sizeof(wq_spec)); 2221 memset(&cq_spec, 0, sizeof(cq_spec)); 2222 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2223 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2224 2225 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2226 cq_spec.queue_size = cq->gdma_cq->queue_size; 2227 cq_spec.modr_ctx_id = 0; 2228 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2229 2230 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2231 &wq_spec, &cq_spec, &rxq->rxobj); 2232 if (err) 2233 goto out; 2234 2235 rxq->gdma_rq->id = wq_spec.queue_index; 2236 cq->gdma_cq->id = cq_spec.queue_index; 2237 2238 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2239 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2240 2241 rxq->gdma_id = rxq->gdma_rq->id; 2242 cq->gdma_id = cq->gdma_cq->id; 2243 2244 err = mana_push_wqe(rxq); 2245 if (err) 2246 goto out; 2247 2248 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2249 err = -EINVAL; 2250 goto out; 2251 } 2252 2253 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2254 2255 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2256 2257 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2258 cq->napi.napi_id)); 2259 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2260 rxq->page_pool)); 2261 2262 napi_enable(&cq->napi); 2263 2264 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2265 out: 2266 if (!err) 2267 return rxq; 2268 2269 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2270 2271 mana_destroy_rxq(apc, rxq, false); 2272 2273 if (cq) 2274 mana_deinit_cq(apc, cq); 2275 2276 return NULL; 2277 } 2278 2279 static int mana_add_rx_queues(struct mana_port_context *apc, 2280 struct net_device *ndev) 2281 { 2282 struct mana_context *ac = apc->ac; 2283 struct mana_rxq *rxq; 2284 int err = 0; 2285 int i; 2286 2287 for (i = 0; i < apc->num_queues; i++) { 2288 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2289 if (!rxq) { 2290 err = -ENOMEM; 2291 goto out; 2292 } 2293 2294 u64_stats_init(&rxq->stats.syncp); 2295 2296 apc->rxqs[i] = rxq; 2297 } 2298 2299 apc->default_rxobj = apc->rxqs[0]->rxobj; 2300 out: 2301 return err; 2302 } 2303 2304 static void mana_destroy_vport(struct mana_port_context *apc) 2305 { 2306 struct gdma_dev *gd = apc->ac->gdma_dev; 2307 struct mana_rxq *rxq; 2308 u32 rxq_idx; 2309 2310 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2311 rxq = apc->rxqs[rxq_idx]; 2312 if (!rxq) 2313 continue; 2314 2315 mana_destroy_rxq(apc, rxq, true); 2316 apc->rxqs[rxq_idx] = NULL; 2317 } 2318 2319 mana_destroy_txq(apc); 2320 mana_uncfg_vport(apc); 2321 2322 if (gd->gdma_context->is_pf) 2323 mana_pf_deregister_hw_vport(apc); 2324 } 2325 2326 static int mana_create_vport(struct mana_port_context *apc, 2327 struct net_device *net) 2328 { 2329 struct gdma_dev *gd = apc->ac->gdma_dev; 2330 int err; 2331 2332 apc->default_rxobj = INVALID_MANA_HANDLE; 2333 2334 if (gd->gdma_context->is_pf) { 2335 err = mana_pf_register_hw_vport(apc); 2336 if (err) 2337 return err; 2338 } 2339 2340 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2341 if (err) 2342 return err; 2343 2344 return mana_create_txq(apc, net); 2345 } 2346 2347 static void mana_rss_table_init(struct mana_port_context *apc) 2348 { 2349 int i; 2350 2351 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 2352 apc->indir_table[i] = 2353 ethtool_rxfh_indir_default(i, apc->num_queues); 2354 } 2355 2356 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2357 bool update_hash, bool update_tab) 2358 { 2359 u32 queue_idx; 2360 int err; 2361 int i; 2362 2363 if (update_tab) { 2364 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) { 2365 queue_idx = apc->indir_table[i]; 2366 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2367 } 2368 } 2369 2370 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2371 if (err) 2372 return err; 2373 2374 mana_fence_rqs(apc); 2375 2376 return 0; 2377 } 2378 2379 void mana_query_gf_stats(struct mana_port_context *apc) 2380 { 2381 struct mana_query_gf_stat_resp resp = {}; 2382 struct mana_query_gf_stat_req req = {}; 2383 struct net_device *ndev = apc->ndev; 2384 int err; 2385 2386 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2387 sizeof(req), sizeof(resp)); 2388 req.req_stats = STATISTICS_FLAGS_HC_TX_BYTES | 2389 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2390 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2391 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2392 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2393 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2394 STATISTICS_FLAGS_HC_TX_BCAST_BYTES; 2395 2396 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 2397 sizeof(resp)); 2398 if (err) { 2399 netdev_err(ndev, "Failed to query GF stats: %d\n", err); 2400 return; 2401 } 2402 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2403 sizeof(resp)); 2404 if (err || resp.hdr.status) { 2405 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err, 2406 resp.hdr.status); 2407 return; 2408 } 2409 2410 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes; 2411 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2412 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2413 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2414 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2415 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2416 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2417 } 2418 2419 static int mana_init_port(struct net_device *ndev) 2420 { 2421 struct mana_port_context *apc = netdev_priv(ndev); 2422 u32 max_txq, max_rxq, max_queues; 2423 int port_idx = apc->port_idx; 2424 u32 num_indirect_entries; 2425 int err; 2426 2427 err = mana_init_port_context(apc); 2428 if (err) 2429 return err; 2430 2431 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2432 &num_indirect_entries); 2433 if (err) { 2434 netdev_err(ndev, "Failed to query info for vPort %d\n", 2435 port_idx); 2436 goto reset_apc; 2437 } 2438 2439 max_queues = min_t(u32, max_txq, max_rxq); 2440 if (apc->max_queues > max_queues) 2441 apc->max_queues = max_queues; 2442 2443 if (apc->num_queues > apc->max_queues) 2444 apc->num_queues = apc->max_queues; 2445 2446 eth_hw_addr_set(ndev, apc->mac_addr); 2447 2448 return 0; 2449 2450 reset_apc: 2451 kfree(apc->rxqs); 2452 apc->rxqs = NULL; 2453 return err; 2454 } 2455 2456 int mana_alloc_queues(struct net_device *ndev) 2457 { 2458 struct mana_port_context *apc = netdev_priv(ndev); 2459 struct gdma_dev *gd = apc->ac->gdma_dev; 2460 int err; 2461 2462 err = mana_create_vport(apc, ndev); 2463 if (err) 2464 return err; 2465 2466 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2467 if (err) 2468 goto destroy_vport; 2469 2470 err = mana_add_rx_queues(apc, ndev); 2471 if (err) 2472 goto destroy_vport; 2473 2474 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2475 2476 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2477 if (err) 2478 goto destroy_vport; 2479 2480 mana_rss_table_init(apc); 2481 2482 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2483 if (err) 2484 goto destroy_vport; 2485 2486 if (gd->gdma_context->is_pf) { 2487 err = mana_pf_register_filter(apc); 2488 if (err) 2489 goto destroy_vport; 2490 } 2491 2492 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2493 2494 return 0; 2495 2496 destroy_vport: 2497 mana_destroy_vport(apc); 2498 return err; 2499 } 2500 2501 int mana_attach(struct net_device *ndev) 2502 { 2503 struct mana_port_context *apc = netdev_priv(ndev); 2504 int err; 2505 2506 ASSERT_RTNL(); 2507 2508 err = mana_init_port(ndev); 2509 if (err) 2510 return err; 2511 2512 if (apc->port_st_save) { 2513 err = mana_alloc_queues(ndev); 2514 if (err) { 2515 mana_cleanup_port_context(apc); 2516 return err; 2517 } 2518 } 2519 2520 apc->port_is_up = apc->port_st_save; 2521 2522 /* Ensure port state updated before txq state */ 2523 smp_wmb(); 2524 2525 if (apc->port_is_up) 2526 netif_carrier_on(ndev); 2527 2528 netif_device_attach(ndev); 2529 2530 return 0; 2531 } 2532 2533 static int mana_dealloc_queues(struct net_device *ndev) 2534 { 2535 struct mana_port_context *apc = netdev_priv(ndev); 2536 unsigned long timeout = jiffies + 120 * HZ; 2537 struct gdma_dev *gd = apc->ac->gdma_dev; 2538 struct mana_txq *txq; 2539 struct sk_buff *skb; 2540 int i, err; 2541 u32 tsleep; 2542 2543 if (apc->port_is_up) 2544 return -EINVAL; 2545 2546 mana_chn_setxdp(apc, NULL); 2547 2548 if (gd->gdma_context->is_pf) 2549 mana_pf_deregister_filter(apc); 2550 2551 /* No packet can be transmitted now since apc->port_is_up is false. 2552 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2553 * a txq because it may not timely see apc->port_is_up being cleared 2554 * to false, but it doesn't matter since mana_start_xmit() drops any 2555 * new packets due to apc->port_is_up being false. 2556 * 2557 * Drain all the in-flight TX packets. 2558 * A timeout of 120 seconds for all the queues is used. 2559 * This will break the while loop when h/w is not responding. 2560 * This value of 120 has been decided here considering max 2561 * number of queues. 2562 */ 2563 2564 for (i = 0; i < apc->num_queues; i++) { 2565 txq = &apc->tx_qp[i].txq; 2566 tsleep = 1000; 2567 while (atomic_read(&txq->pending_sends) > 0 && 2568 time_before(jiffies, timeout)) { 2569 usleep_range(tsleep, tsleep + 1000); 2570 tsleep <<= 1; 2571 } 2572 if (atomic_read(&txq->pending_sends)) { 2573 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 2574 if (err) { 2575 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 2576 err, atomic_read(&txq->pending_sends), 2577 txq->gdma_txq_id); 2578 } 2579 break; 2580 } 2581 } 2582 2583 for (i = 0; i < apc->num_queues; i++) { 2584 txq = &apc->tx_qp[i].txq; 2585 while ((skb = skb_dequeue(&txq->pending_skbs))) { 2586 mana_unmap_skb(skb, apc); 2587 dev_kfree_skb_any(skb); 2588 } 2589 atomic_set(&txq->pending_sends, 0); 2590 } 2591 /* We're 100% sure the queues can no longer be woken up, because 2592 * we're sure now mana_poll_tx_cq() can't be running. 2593 */ 2594 2595 apc->rss_state = TRI_STATE_FALSE; 2596 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2597 if (err) { 2598 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2599 return err; 2600 } 2601 2602 mana_destroy_vport(apc); 2603 2604 return 0; 2605 } 2606 2607 int mana_detach(struct net_device *ndev, bool from_close) 2608 { 2609 struct mana_port_context *apc = netdev_priv(ndev); 2610 int err; 2611 2612 ASSERT_RTNL(); 2613 2614 apc->port_st_save = apc->port_is_up; 2615 apc->port_is_up = false; 2616 2617 /* Ensure port state updated before txq state */ 2618 smp_wmb(); 2619 2620 netif_tx_disable(ndev); 2621 netif_carrier_off(ndev); 2622 2623 if (apc->port_st_save) { 2624 err = mana_dealloc_queues(ndev); 2625 if (err) 2626 return err; 2627 } 2628 2629 if (!from_close) { 2630 netif_device_detach(ndev); 2631 mana_cleanup_port_context(apc); 2632 } 2633 2634 return 0; 2635 } 2636 2637 static int mana_probe_port(struct mana_context *ac, int port_idx, 2638 struct net_device **ndev_storage) 2639 { 2640 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2641 struct mana_port_context *apc; 2642 struct net_device *ndev; 2643 int err; 2644 2645 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2646 gc->max_num_queues); 2647 if (!ndev) 2648 return -ENOMEM; 2649 2650 *ndev_storage = ndev; 2651 2652 apc = netdev_priv(ndev); 2653 apc->ac = ac; 2654 apc->ndev = ndev; 2655 apc->max_queues = gc->max_num_queues; 2656 apc->num_queues = gc->max_num_queues; 2657 apc->port_handle = INVALID_MANA_HANDLE; 2658 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2659 apc->port_idx = port_idx; 2660 2661 mutex_init(&apc->vport_mutex); 2662 apc->vport_use_count = 0; 2663 2664 ndev->netdev_ops = &mana_devops; 2665 ndev->ethtool_ops = &mana_ethtool_ops; 2666 ndev->mtu = ETH_DATA_LEN; 2667 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2668 ndev->min_mtu = ETH_MIN_MTU; 2669 ndev->needed_headroom = MANA_HEADROOM; 2670 ndev->dev_port = port_idx; 2671 SET_NETDEV_DEV(ndev, gc->dev); 2672 2673 netif_carrier_off(ndev); 2674 2675 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2676 2677 err = mana_init_port(ndev); 2678 if (err) 2679 goto free_net; 2680 2681 netdev_lockdep_set_classes(ndev); 2682 2683 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2684 ndev->hw_features |= NETIF_F_RXCSUM; 2685 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2686 ndev->hw_features |= NETIF_F_RXHASH; 2687 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2688 NETIF_F_HW_VLAN_CTAG_RX; 2689 ndev->vlan_features = ndev->features; 2690 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 2691 NETDEV_XDP_ACT_REDIRECT | 2692 NETDEV_XDP_ACT_NDO_XMIT); 2693 2694 err = register_netdev(ndev); 2695 if (err) { 2696 netdev_err(ndev, "Unable to register netdev.\n"); 2697 goto reset_apc; 2698 } 2699 2700 return 0; 2701 2702 reset_apc: 2703 kfree(apc->rxqs); 2704 apc->rxqs = NULL; 2705 free_net: 2706 *ndev_storage = NULL; 2707 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2708 free_netdev(ndev); 2709 return err; 2710 } 2711 2712 static void adev_release(struct device *dev) 2713 { 2714 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2715 2716 kfree(madev); 2717 } 2718 2719 static void remove_adev(struct gdma_dev *gd) 2720 { 2721 struct auxiliary_device *adev = gd->adev; 2722 int id = adev->id; 2723 2724 auxiliary_device_delete(adev); 2725 auxiliary_device_uninit(adev); 2726 2727 mana_adev_idx_free(id); 2728 gd->adev = NULL; 2729 } 2730 2731 static int add_adev(struct gdma_dev *gd) 2732 { 2733 struct auxiliary_device *adev; 2734 struct mana_adev *madev; 2735 int ret; 2736 2737 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2738 if (!madev) 2739 return -ENOMEM; 2740 2741 adev = &madev->adev; 2742 ret = mana_adev_idx_alloc(); 2743 if (ret < 0) 2744 goto idx_fail; 2745 adev->id = ret; 2746 2747 adev->name = "rdma"; 2748 adev->dev.parent = gd->gdma_context->dev; 2749 adev->dev.release = adev_release; 2750 madev->mdev = gd; 2751 2752 ret = auxiliary_device_init(adev); 2753 if (ret) 2754 goto init_fail; 2755 2756 ret = auxiliary_device_add(adev); 2757 if (ret) 2758 goto add_fail; 2759 2760 gd->adev = adev; 2761 return 0; 2762 2763 add_fail: 2764 auxiliary_device_uninit(adev); 2765 2766 init_fail: 2767 mana_adev_idx_free(adev->id); 2768 2769 idx_fail: 2770 kfree(madev); 2771 2772 return ret; 2773 } 2774 2775 int mana_probe(struct gdma_dev *gd, bool resuming) 2776 { 2777 struct gdma_context *gc = gd->gdma_context; 2778 struct mana_context *ac = gd->driver_data; 2779 struct device *dev = gc->dev; 2780 u16 num_ports = 0; 2781 int err; 2782 int i; 2783 2784 dev_info(dev, 2785 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2786 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2787 2788 err = mana_gd_register_device(gd); 2789 if (err) 2790 return err; 2791 2792 if (!resuming) { 2793 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 2794 if (!ac) 2795 return -ENOMEM; 2796 2797 ac->gdma_dev = gd; 2798 gd->driver_data = ac; 2799 } 2800 2801 err = mana_create_eq(ac); 2802 if (err) 2803 goto out; 2804 2805 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 2806 MANA_MICRO_VERSION, &num_ports); 2807 if (err) 2808 goto out; 2809 2810 if (!resuming) { 2811 ac->num_ports = num_ports; 2812 } else { 2813 if (ac->num_ports != num_ports) { 2814 dev_err(dev, "The number of vPorts changed: %d->%d\n", 2815 ac->num_ports, num_ports); 2816 err = -EPROTO; 2817 goto out; 2818 } 2819 } 2820 2821 if (ac->num_ports == 0) 2822 dev_err(dev, "Failed to detect any vPort\n"); 2823 2824 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 2825 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 2826 2827 if (!resuming) { 2828 for (i = 0; i < ac->num_ports; i++) { 2829 err = mana_probe_port(ac, i, &ac->ports[i]); 2830 if (err) 2831 break; 2832 } 2833 } else { 2834 for (i = 0; i < ac->num_ports; i++) { 2835 rtnl_lock(); 2836 err = mana_attach(ac->ports[i]); 2837 rtnl_unlock(); 2838 if (err) 2839 break; 2840 } 2841 } 2842 2843 err = add_adev(gd); 2844 out: 2845 if (err) 2846 mana_remove(gd, false); 2847 2848 return err; 2849 } 2850 2851 void mana_remove(struct gdma_dev *gd, bool suspending) 2852 { 2853 struct gdma_context *gc = gd->gdma_context; 2854 struct mana_context *ac = gd->driver_data; 2855 struct device *dev = gc->dev; 2856 struct net_device *ndev; 2857 int err; 2858 int i; 2859 2860 /* adev currently doesn't support suspending, always remove it */ 2861 if (gd->adev) 2862 remove_adev(gd); 2863 2864 for (i = 0; i < ac->num_ports; i++) { 2865 ndev = ac->ports[i]; 2866 if (!ndev) { 2867 if (i == 0) 2868 dev_err(dev, "No net device to remove\n"); 2869 goto out; 2870 } 2871 2872 /* All cleanup actions should stay after rtnl_lock(), otherwise 2873 * other functions may access partially cleaned up data. 2874 */ 2875 rtnl_lock(); 2876 2877 err = mana_detach(ndev, false); 2878 if (err) 2879 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 2880 i, err); 2881 2882 if (suspending) { 2883 /* No need to unregister the ndev. */ 2884 rtnl_unlock(); 2885 continue; 2886 } 2887 2888 unregister_netdevice(ndev); 2889 2890 rtnl_unlock(); 2891 2892 free_netdev(ndev); 2893 } 2894 2895 mana_destroy_eq(ac); 2896 out: 2897 mana_gd_deregister_device(gd); 2898 2899 if (suspending) 2900 return; 2901 2902 gd->driver_data = NULL; 2903 gd->gdma_context = NULL; 2904 kfree(ac); 2905 } 2906