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 & (apc->indir_table_sz - 1)]; 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 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 int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu, int num_queues) 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 = num_queues * mpc->rx_queue_size; 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, mpc->num_queues); 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 WRITE_ONCE(ndev->mtu, new_mtu); 698 699 err = mana_attach(ndev); 700 if (err) { 701 netdev_err(ndev, "mana_attach failed: %d\n", err); 702 WRITE_ONCE(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 void mana_cleanup_indir_table(struct mana_port_context *apc) 729 { 730 apc->indir_table_sz = 0; 731 kfree(apc->indir_table); 732 kfree(apc->rxobj_table); 733 } 734 735 static int mana_init_port_context(struct mana_port_context *apc) 736 { 737 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 738 GFP_KERNEL); 739 740 return !apc->rxqs ? -ENOMEM : 0; 741 } 742 743 static int mana_send_request(struct mana_context *ac, void *in_buf, 744 u32 in_len, void *out_buf, u32 out_len) 745 { 746 struct gdma_context *gc = ac->gdma_dev->gdma_context; 747 struct gdma_resp_hdr *resp = out_buf; 748 struct gdma_req_hdr *req = in_buf; 749 struct device *dev = gc->dev; 750 static atomic_t activity_id; 751 int err; 752 753 req->dev_id = gc->mana.dev_id; 754 req->activity_id = atomic_inc_return(&activity_id); 755 756 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 757 out_buf); 758 if (err || resp->status) { 759 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 760 err, resp->status); 761 return err ? err : -EPROTO; 762 } 763 764 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 765 req->activity_id != resp->activity_id) { 766 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 767 req->dev_id.as_uint32, resp->dev_id.as_uint32, 768 req->activity_id, resp->activity_id); 769 return -EPROTO; 770 } 771 772 return 0; 773 } 774 775 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 776 const enum mana_command_code expected_code, 777 const u32 min_size) 778 { 779 if (resp_hdr->response.msg_type != expected_code) 780 return -EPROTO; 781 782 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 783 return -EPROTO; 784 785 if (resp_hdr->response.msg_size < min_size) 786 return -EPROTO; 787 788 return 0; 789 } 790 791 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 792 { 793 struct mana_register_hw_vport_resp resp = {}; 794 struct mana_register_hw_vport_req req = {}; 795 int err; 796 797 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 798 sizeof(req), sizeof(resp)); 799 req.attached_gfid = 1; 800 req.is_pf_default_vport = 1; 801 req.allow_all_ether_types = 1; 802 803 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 804 sizeof(resp)); 805 if (err) { 806 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 807 return err; 808 } 809 810 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 811 sizeof(resp)); 812 if (err || resp.hdr.status) { 813 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 814 err, resp.hdr.status); 815 return err ? err : -EPROTO; 816 } 817 818 apc->port_handle = resp.hw_vport_handle; 819 return 0; 820 } 821 822 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 823 { 824 struct mana_deregister_hw_vport_resp resp = {}; 825 struct mana_deregister_hw_vport_req req = {}; 826 int err; 827 828 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 829 sizeof(req), sizeof(resp)); 830 req.hw_vport_handle = apc->port_handle; 831 832 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 833 sizeof(resp)); 834 if (err) { 835 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 836 err); 837 return; 838 } 839 840 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 841 sizeof(resp)); 842 if (err || resp.hdr.status) 843 netdev_err(apc->ndev, 844 "Failed to deregister hw vPort: %d, 0x%x\n", 845 err, resp.hdr.status); 846 } 847 848 static int mana_pf_register_filter(struct mana_port_context *apc) 849 { 850 struct mana_register_filter_resp resp = {}; 851 struct mana_register_filter_req req = {}; 852 int err; 853 854 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 855 sizeof(req), sizeof(resp)); 856 req.vport = apc->port_handle; 857 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 858 859 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 860 sizeof(resp)); 861 if (err) { 862 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 863 return err; 864 } 865 866 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 867 sizeof(resp)); 868 if (err || resp.hdr.status) { 869 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 870 err, resp.hdr.status); 871 return err ? err : -EPROTO; 872 } 873 874 apc->pf_filter_handle = resp.filter_handle; 875 return 0; 876 } 877 878 static void mana_pf_deregister_filter(struct mana_port_context *apc) 879 { 880 struct mana_deregister_filter_resp resp = {}; 881 struct mana_deregister_filter_req req = {}; 882 int err; 883 884 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 885 sizeof(req), sizeof(resp)); 886 req.filter_handle = apc->pf_filter_handle; 887 888 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 889 sizeof(resp)); 890 if (err) { 891 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 892 err); 893 return; 894 } 895 896 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 897 sizeof(resp)); 898 if (err || resp.hdr.status) 899 netdev_err(apc->ndev, 900 "Failed to deregister filter: %d, 0x%x\n", 901 err, resp.hdr.status); 902 } 903 904 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 905 u32 proto_minor_ver, u32 proto_micro_ver, 906 u16 *max_num_vports) 907 { 908 struct gdma_context *gc = ac->gdma_dev->gdma_context; 909 struct mana_query_device_cfg_resp resp = {}; 910 struct mana_query_device_cfg_req req = {}; 911 struct device *dev = gc->dev; 912 int err = 0; 913 914 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 915 sizeof(req), sizeof(resp)); 916 917 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 918 919 req.proto_major_ver = proto_major_ver; 920 req.proto_minor_ver = proto_minor_ver; 921 req.proto_micro_ver = proto_micro_ver; 922 923 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 924 if (err) { 925 dev_err(dev, "Failed to query config: %d", err); 926 return err; 927 } 928 929 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 930 sizeof(resp)); 931 if (err || resp.hdr.status) { 932 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 933 resp.hdr.status); 934 if (!err) 935 err = -EPROTO; 936 return err; 937 } 938 939 *max_num_vports = resp.max_num_vports; 940 941 if (resp.hdr.response.msg_version == GDMA_MESSAGE_V2) 942 gc->adapter_mtu = resp.adapter_mtu; 943 else 944 gc->adapter_mtu = ETH_FRAME_LEN; 945 946 return 0; 947 } 948 949 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 950 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 951 { 952 struct mana_query_vport_cfg_resp resp = {}; 953 struct mana_query_vport_cfg_req req = {}; 954 int err; 955 956 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 957 sizeof(req), sizeof(resp)); 958 959 req.vport_index = vport_index; 960 961 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 962 sizeof(resp)); 963 if (err) 964 return err; 965 966 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 967 sizeof(resp)); 968 if (err) 969 return err; 970 971 if (resp.hdr.status) 972 return -EPROTO; 973 974 *max_sq = resp.max_num_sq; 975 *max_rq = resp.max_num_rq; 976 if (resp.num_indirection_ent > 0 && 977 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE && 978 is_power_of_2(resp.num_indirection_ent)) { 979 *num_indir_entry = resp.num_indirection_ent; 980 } else { 981 netdev_warn(apc->ndev, 982 "Setting indirection table size to default %d for vPort %d\n", 983 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx); 984 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE; 985 } 986 987 apc->port_handle = resp.vport; 988 ether_addr_copy(apc->mac_addr, resp.mac_addr); 989 990 return 0; 991 } 992 993 void mana_uncfg_vport(struct mana_port_context *apc) 994 { 995 mutex_lock(&apc->vport_mutex); 996 apc->vport_use_count--; 997 WARN_ON(apc->vport_use_count < 0); 998 mutex_unlock(&apc->vport_mutex); 999 } 1000 EXPORT_SYMBOL_NS(mana_uncfg_vport, NET_MANA); 1001 1002 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 1003 u32 doorbell_pg_id) 1004 { 1005 struct mana_config_vport_resp resp = {}; 1006 struct mana_config_vport_req req = {}; 1007 int err; 1008 1009 /* This function is used to program the Ethernet port in the hardware 1010 * table. It can be called from the Ethernet driver or the RDMA driver. 1011 * 1012 * For Ethernet usage, the hardware supports only one active user on a 1013 * physical port. The driver checks on the port usage before programming 1014 * the hardware when creating the RAW QP (RDMA driver) or exposing the 1015 * device to kernel NET layer (Ethernet driver). 1016 * 1017 * Because the RDMA driver doesn't know in advance which QP type the 1018 * user will create, it exposes the device with all its ports. The user 1019 * may not be able to create RAW QP on a port if this port is already 1020 * in used by the Ethernet driver from the kernel. 1021 * 1022 * This physical port limitation only applies to the RAW QP. For RC QP, 1023 * the hardware doesn't have this limitation. The user can create RC 1024 * QPs on a physical port up to the hardware limits independent of the 1025 * Ethernet usage on the same port. 1026 */ 1027 mutex_lock(&apc->vport_mutex); 1028 if (apc->vport_use_count > 0) { 1029 mutex_unlock(&apc->vport_mutex); 1030 return -EBUSY; 1031 } 1032 apc->vport_use_count++; 1033 mutex_unlock(&apc->vport_mutex); 1034 1035 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1036 sizeof(req), sizeof(resp)); 1037 req.vport = apc->port_handle; 1038 req.pdid = protection_dom_id; 1039 req.doorbell_pageid = doorbell_pg_id; 1040 1041 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1042 sizeof(resp)); 1043 if (err) { 1044 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1045 goto out; 1046 } 1047 1048 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1049 sizeof(resp)); 1050 if (err || resp.hdr.status) { 1051 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1052 err, resp.hdr.status); 1053 if (!err) 1054 err = -EPROTO; 1055 1056 goto out; 1057 } 1058 1059 apc->tx_shortform_allowed = resp.short_form_allowed; 1060 apc->tx_vp_offset = resp.tx_vport_offset; 1061 1062 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 1063 apc->port_handle, protection_dom_id, doorbell_pg_id); 1064 out: 1065 if (err) 1066 mana_uncfg_vport(apc); 1067 1068 return err; 1069 } 1070 EXPORT_SYMBOL_NS(mana_cfg_vport, NET_MANA); 1071 1072 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1073 enum TRI_STATE rx, 1074 bool update_default_rxobj, bool update_key, 1075 bool update_tab) 1076 { 1077 struct mana_cfg_rx_steer_req_v2 *req; 1078 struct mana_cfg_rx_steer_resp resp = {}; 1079 struct net_device *ndev = apc->ndev; 1080 u32 req_buf_size; 1081 int err; 1082 1083 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz); 1084 req = kzalloc(req_buf_size, GFP_KERNEL); 1085 if (!req) 1086 return -ENOMEM; 1087 1088 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1089 sizeof(resp)); 1090 1091 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1092 1093 req->vport = apc->port_handle; 1094 req->num_indir_entries = apc->indir_table_sz; 1095 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, 1096 indir_tab); 1097 req->rx_enable = rx; 1098 req->rss_enable = apc->rss_state; 1099 req->update_default_rxobj = update_default_rxobj; 1100 req->update_hashkey = update_key; 1101 req->update_indir_tab = update_tab; 1102 req->default_rxobj = apc->default_rxobj; 1103 req->cqe_coalescing_enable = 0; 1104 1105 if (update_key) 1106 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1107 1108 if (update_tab) 1109 memcpy(req->indir_tab, apc->rxobj_table, 1110 flex_array_size(req, indir_tab, req->num_indir_entries)); 1111 1112 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1113 sizeof(resp)); 1114 if (err) { 1115 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1116 goto out; 1117 } 1118 1119 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1120 sizeof(resp)); 1121 if (err) { 1122 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1123 goto out; 1124 } 1125 1126 if (resp.hdr.status) { 1127 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1128 resp.hdr.status); 1129 err = -EPROTO; 1130 } 1131 1132 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1133 apc->port_handle, apc->indir_table_sz); 1134 out: 1135 kfree(req); 1136 return err; 1137 } 1138 1139 int mana_create_wq_obj(struct mana_port_context *apc, 1140 mana_handle_t vport, 1141 u32 wq_type, struct mana_obj_spec *wq_spec, 1142 struct mana_obj_spec *cq_spec, 1143 mana_handle_t *wq_obj) 1144 { 1145 struct mana_create_wqobj_resp resp = {}; 1146 struct mana_create_wqobj_req req = {}; 1147 struct net_device *ndev = apc->ndev; 1148 int err; 1149 1150 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1151 sizeof(req), sizeof(resp)); 1152 req.vport = vport; 1153 req.wq_type = wq_type; 1154 req.wq_gdma_region = wq_spec->gdma_region; 1155 req.cq_gdma_region = cq_spec->gdma_region; 1156 req.wq_size = wq_spec->queue_size; 1157 req.cq_size = cq_spec->queue_size; 1158 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1159 req.cq_parent_qid = cq_spec->attached_eq; 1160 1161 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1162 sizeof(resp)); 1163 if (err) { 1164 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1165 goto out; 1166 } 1167 1168 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1169 sizeof(resp)); 1170 if (err || resp.hdr.status) { 1171 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1172 resp.hdr.status); 1173 if (!err) 1174 err = -EPROTO; 1175 goto out; 1176 } 1177 1178 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1179 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1180 err = -EPROTO; 1181 goto out; 1182 } 1183 1184 *wq_obj = resp.wq_obj; 1185 wq_spec->queue_index = resp.wq_id; 1186 cq_spec->queue_index = resp.cq_id; 1187 1188 return 0; 1189 out: 1190 return err; 1191 } 1192 EXPORT_SYMBOL_NS(mana_create_wq_obj, NET_MANA); 1193 1194 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1195 mana_handle_t wq_obj) 1196 { 1197 struct mana_destroy_wqobj_resp resp = {}; 1198 struct mana_destroy_wqobj_req req = {}; 1199 struct net_device *ndev = apc->ndev; 1200 int err; 1201 1202 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1203 sizeof(req), sizeof(resp)); 1204 req.wq_type = wq_type; 1205 req.wq_obj_handle = wq_obj; 1206 1207 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1208 sizeof(resp)); 1209 if (err) { 1210 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1211 return; 1212 } 1213 1214 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1215 sizeof(resp)); 1216 if (err || resp.hdr.status) 1217 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1218 resp.hdr.status); 1219 } 1220 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, NET_MANA); 1221 1222 static void mana_destroy_eq(struct mana_context *ac) 1223 { 1224 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1225 struct gdma_queue *eq; 1226 int i; 1227 1228 if (!ac->eqs) 1229 return; 1230 1231 for (i = 0; i < gc->max_num_queues; i++) { 1232 eq = ac->eqs[i].eq; 1233 if (!eq) 1234 continue; 1235 1236 mana_gd_destroy_queue(gc, eq); 1237 } 1238 1239 kfree(ac->eqs); 1240 ac->eqs = NULL; 1241 } 1242 1243 static int mana_create_eq(struct mana_context *ac) 1244 { 1245 struct gdma_dev *gd = ac->gdma_dev; 1246 struct gdma_context *gc = gd->gdma_context; 1247 struct gdma_queue_spec spec = {}; 1248 int err; 1249 int i; 1250 1251 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq), 1252 GFP_KERNEL); 1253 if (!ac->eqs) 1254 return -ENOMEM; 1255 1256 spec.type = GDMA_EQ; 1257 spec.monitor_avl_buf = false; 1258 spec.queue_size = EQ_SIZE; 1259 spec.eq.callback = NULL; 1260 spec.eq.context = ac->eqs; 1261 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1262 1263 for (i = 0; i < gc->max_num_queues; i++) { 1264 spec.eq.msix_index = (i + 1) % gc->num_msix_usable; 1265 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1266 if (err) 1267 goto out; 1268 } 1269 1270 return 0; 1271 out: 1272 mana_destroy_eq(ac); 1273 return err; 1274 } 1275 1276 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1277 { 1278 struct mana_fence_rq_resp resp = {}; 1279 struct mana_fence_rq_req req = {}; 1280 int err; 1281 1282 init_completion(&rxq->fence_event); 1283 1284 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1285 sizeof(req), sizeof(resp)); 1286 req.wq_obj_handle = rxq->rxobj; 1287 1288 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1289 sizeof(resp)); 1290 if (err) { 1291 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1292 rxq->rxq_idx, err); 1293 return err; 1294 } 1295 1296 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1297 if (err || resp.hdr.status) { 1298 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1299 rxq->rxq_idx, err, resp.hdr.status); 1300 if (!err) 1301 err = -EPROTO; 1302 1303 return err; 1304 } 1305 1306 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1307 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1308 rxq->rxq_idx); 1309 return -ETIMEDOUT; 1310 } 1311 1312 return 0; 1313 } 1314 1315 static void mana_fence_rqs(struct mana_port_context *apc) 1316 { 1317 unsigned int rxq_idx; 1318 struct mana_rxq *rxq; 1319 int err; 1320 1321 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1322 rxq = apc->rxqs[rxq_idx]; 1323 err = mana_fence_rq(apc, rxq); 1324 1325 /* In case of any error, use sleep instead. */ 1326 if (err) 1327 msleep(100); 1328 } 1329 } 1330 1331 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1332 { 1333 u32 used_space_old; 1334 u32 used_space_new; 1335 1336 used_space_old = wq->head - wq->tail; 1337 used_space_new = wq->head - (wq->tail + num_units); 1338 1339 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1340 return -ERANGE; 1341 1342 wq->tail += num_units; 1343 return 0; 1344 } 1345 1346 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1347 { 1348 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1349 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1350 struct device *dev = gc->dev; 1351 int hsg, i; 1352 1353 /* Number of SGEs of linear part */ 1354 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1355 1356 for (i = 0; i < hsg; i++) 1357 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1358 DMA_TO_DEVICE); 1359 1360 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1361 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1362 DMA_TO_DEVICE); 1363 } 1364 1365 static void mana_poll_tx_cq(struct mana_cq *cq) 1366 { 1367 struct gdma_comp *completions = cq->gdma_comp_buf; 1368 struct gdma_posted_wqe_info *wqe_info; 1369 unsigned int pkt_transmitted = 0; 1370 unsigned int wqe_unit_cnt = 0; 1371 struct mana_txq *txq = cq->txq; 1372 struct mana_port_context *apc; 1373 struct netdev_queue *net_txq; 1374 struct gdma_queue *gdma_wq; 1375 unsigned int avail_space; 1376 struct net_device *ndev; 1377 struct sk_buff *skb; 1378 bool txq_stopped; 1379 int comp_read; 1380 int i; 1381 1382 ndev = txq->ndev; 1383 apc = netdev_priv(ndev); 1384 1385 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1386 CQE_POLLING_BUFFER); 1387 1388 if (comp_read < 1) 1389 return; 1390 1391 for (i = 0; i < comp_read; i++) { 1392 struct mana_tx_comp_oob *cqe_oob; 1393 1394 if (WARN_ON_ONCE(!completions[i].is_sq)) 1395 return; 1396 1397 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1398 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1399 MANA_CQE_COMPLETION)) 1400 return; 1401 1402 switch (cqe_oob->cqe_hdr.cqe_type) { 1403 case CQE_TX_OKAY: 1404 break; 1405 1406 case CQE_TX_SA_DROP: 1407 case CQE_TX_MTU_DROP: 1408 case CQE_TX_INVALID_OOB: 1409 case CQE_TX_INVALID_ETH_TYPE: 1410 case CQE_TX_HDR_PROCESSING_ERROR: 1411 case CQE_TX_VF_DISABLED: 1412 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1413 case CQE_TX_VPORT_DISABLED: 1414 case CQE_TX_VLAN_TAGGING_VIOLATION: 1415 if (net_ratelimit()) 1416 netdev_err(ndev, "TX: CQE error %d\n", 1417 cqe_oob->cqe_hdr.cqe_type); 1418 1419 apc->eth_stats.tx_cqe_err++; 1420 break; 1421 1422 default: 1423 /* If the CQE type is unknown, log an error, 1424 * and still free the SKB, update tail, etc. 1425 */ 1426 if (net_ratelimit()) 1427 netdev_err(ndev, "TX: unknown CQE type %d\n", 1428 cqe_oob->cqe_hdr.cqe_type); 1429 1430 apc->eth_stats.tx_cqe_unknown_type++; 1431 break; 1432 } 1433 1434 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1435 return; 1436 1437 skb = skb_dequeue(&txq->pending_skbs); 1438 if (WARN_ON_ONCE(!skb)) 1439 return; 1440 1441 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1442 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1443 1444 mana_unmap_skb(skb, apc); 1445 1446 napi_consume_skb(skb, cq->budget); 1447 1448 pkt_transmitted++; 1449 } 1450 1451 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1452 return; 1453 1454 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1455 1456 gdma_wq = txq->gdma_sq; 1457 avail_space = mana_gd_wq_avail_space(gdma_wq); 1458 1459 /* Ensure tail updated before checking q stop */ 1460 smp_mb(); 1461 1462 net_txq = txq->net_txq; 1463 txq_stopped = netif_tx_queue_stopped(net_txq); 1464 1465 /* Ensure checking txq_stopped before apc->port_is_up. */ 1466 smp_rmb(); 1467 1468 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1469 netif_tx_wake_queue(net_txq); 1470 apc->eth_stats.wake_queue++; 1471 } 1472 1473 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1474 WARN_ON_ONCE(1); 1475 1476 cq->work_done = pkt_transmitted; 1477 } 1478 1479 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1480 { 1481 struct mana_recv_buf_oob *recv_buf_oob; 1482 u32 curr_index; 1483 int err; 1484 1485 curr_index = rxq->buf_index++; 1486 if (rxq->buf_index == rxq->num_rx_buf) 1487 rxq->buf_index = 0; 1488 1489 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1490 1491 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1492 &recv_buf_oob->wqe_inf); 1493 if (WARN_ON_ONCE(err)) 1494 return; 1495 1496 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1497 } 1498 1499 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1500 uint pkt_len, struct xdp_buff *xdp) 1501 { 1502 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1503 1504 if (!skb) 1505 return NULL; 1506 1507 if (xdp->data_hard_start) { 1508 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1509 skb_put(skb, xdp->data_end - xdp->data); 1510 return skb; 1511 } 1512 1513 skb_reserve(skb, rxq->headroom); 1514 skb_put(skb, pkt_len); 1515 1516 return skb; 1517 } 1518 1519 static void mana_rx_skb(void *buf_va, bool from_pool, 1520 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) 1521 { 1522 struct mana_stats_rx *rx_stats = &rxq->stats; 1523 struct net_device *ndev = rxq->ndev; 1524 uint pkt_len = cqe->ppi[0].pkt_len; 1525 u16 rxq_idx = rxq->rxq_idx; 1526 struct napi_struct *napi; 1527 struct xdp_buff xdp = {}; 1528 struct sk_buff *skb; 1529 u32 hash_value; 1530 u32 act; 1531 1532 rxq->rx_cq.work_done++; 1533 napi = &rxq->rx_cq.napi; 1534 1535 if (!buf_va) { 1536 ++ndev->stats.rx_dropped; 1537 return; 1538 } 1539 1540 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1541 1542 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1543 return; 1544 1545 if (act != XDP_PASS && act != XDP_TX) 1546 goto drop_xdp; 1547 1548 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1549 1550 if (!skb) 1551 goto drop; 1552 1553 if (from_pool) 1554 skb_mark_for_recycle(skb); 1555 1556 skb->dev = napi->dev; 1557 1558 skb->protocol = eth_type_trans(skb, ndev); 1559 skb_checksum_none_assert(skb); 1560 skb_record_rx_queue(skb, rxq_idx); 1561 1562 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1563 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1564 skb->ip_summed = CHECKSUM_UNNECESSARY; 1565 } 1566 1567 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1568 hash_value = cqe->ppi[0].pkt_hash; 1569 1570 if (cqe->rx_hashtype & MANA_HASH_L4) 1571 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1572 else 1573 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1574 } 1575 1576 if (cqe->rx_vlantag_present) { 1577 u16 vlan_tci = cqe->rx_vlan_id; 1578 1579 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1580 } 1581 1582 u64_stats_update_begin(&rx_stats->syncp); 1583 rx_stats->packets++; 1584 rx_stats->bytes += pkt_len; 1585 1586 if (act == XDP_TX) 1587 rx_stats->xdp_tx++; 1588 u64_stats_update_end(&rx_stats->syncp); 1589 1590 if (act == XDP_TX) { 1591 skb_set_queue_mapping(skb, rxq_idx); 1592 mana_xdp_tx(skb, ndev); 1593 return; 1594 } 1595 1596 napi_gro_receive(napi, skb); 1597 1598 return; 1599 1600 drop_xdp: 1601 u64_stats_update_begin(&rx_stats->syncp); 1602 rx_stats->xdp_drop++; 1603 u64_stats_update_end(&rx_stats->syncp); 1604 1605 drop: 1606 if (from_pool) { 1607 page_pool_recycle_direct(rxq->page_pool, 1608 virt_to_head_page(buf_va)); 1609 } else { 1610 WARN_ON_ONCE(rxq->xdp_save_va); 1611 /* Save for reuse */ 1612 rxq->xdp_save_va = buf_va; 1613 } 1614 1615 ++ndev->stats.rx_dropped; 1616 1617 return; 1618 } 1619 1620 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 1621 dma_addr_t *da, bool *from_pool, bool is_napi) 1622 { 1623 struct page *page; 1624 void *va; 1625 1626 *from_pool = false; 1627 1628 /* Reuse XDP dropped page if available */ 1629 if (rxq->xdp_save_va) { 1630 va = rxq->xdp_save_va; 1631 rxq->xdp_save_va = NULL; 1632 } else if (rxq->alloc_size > PAGE_SIZE) { 1633 if (is_napi) 1634 va = napi_alloc_frag(rxq->alloc_size); 1635 else 1636 va = netdev_alloc_frag(rxq->alloc_size); 1637 1638 if (!va) 1639 return NULL; 1640 1641 page = virt_to_head_page(va); 1642 /* Check if the frag falls back to single page */ 1643 if (compound_order(page) < get_order(rxq->alloc_size)) { 1644 put_page(page); 1645 return NULL; 1646 } 1647 } else { 1648 page = page_pool_dev_alloc_pages(rxq->page_pool); 1649 if (!page) 1650 return NULL; 1651 1652 *from_pool = true; 1653 va = page_to_virt(page); 1654 } 1655 1656 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 1657 DMA_FROM_DEVICE); 1658 if (dma_mapping_error(dev, *da)) { 1659 if (*from_pool) 1660 page_pool_put_full_page(rxq->page_pool, page, false); 1661 else 1662 put_page(virt_to_head_page(va)); 1663 1664 return NULL; 1665 } 1666 1667 return va; 1668 } 1669 1670 /* Allocate frag for rx buffer, and save the old buf */ 1671 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 1672 struct mana_recv_buf_oob *rxoob, void **old_buf, 1673 bool *old_fp) 1674 { 1675 bool from_pool; 1676 dma_addr_t da; 1677 void *va; 1678 1679 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, true); 1680 if (!va) 1681 return; 1682 1683 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 1684 DMA_FROM_DEVICE); 1685 *old_buf = rxoob->buf_va; 1686 *old_fp = rxoob->from_pool; 1687 1688 rxoob->buf_va = va; 1689 rxoob->sgl[0].address = da; 1690 rxoob->from_pool = from_pool; 1691 } 1692 1693 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1694 struct gdma_comp *cqe) 1695 { 1696 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1697 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1698 struct net_device *ndev = rxq->ndev; 1699 struct mana_recv_buf_oob *rxbuf_oob; 1700 struct mana_port_context *apc; 1701 struct device *dev = gc->dev; 1702 void *old_buf = NULL; 1703 u32 curr, pktlen; 1704 bool old_fp; 1705 1706 apc = netdev_priv(ndev); 1707 1708 switch (oob->cqe_hdr.cqe_type) { 1709 case CQE_RX_OKAY: 1710 break; 1711 1712 case CQE_RX_TRUNCATED: 1713 ++ndev->stats.rx_dropped; 1714 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1715 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1716 goto drop; 1717 1718 case CQE_RX_COALESCED_4: 1719 netdev_err(ndev, "RX coalescing is unsupported\n"); 1720 apc->eth_stats.rx_coalesced_err++; 1721 return; 1722 1723 case CQE_RX_OBJECT_FENCE: 1724 complete(&rxq->fence_event); 1725 return; 1726 1727 default: 1728 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1729 oob->cqe_hdr.cqe_type); 1730 apc->eth_stats.rx_cqe_unknown_type++; 1731 return; 1732 } 1733 1734 pktlen = oob->ppi[0].pkt_len; 1735 1736 if (pktlen == 0) { 1737 /* data packets should never have packetlength of zero */ 1738 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1739 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1740 return; 1741 } 1742 1743 curr = rxq->buf_index; 1744 rxbuf_oob = &rxq->rx_oobs[curr]; 1745 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1746 1747 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 1748 1749 /* Unsuccessful refill will have old_buf == NULL. 1750 * In this case, mana_rx_skb() will drop the packet. 1751 */ 1752 mana_rx_skb(old_buf, old_fp, oob, rxq); 1753 1754 drop: 1755 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1756 1757 mana_post_pkt_rxq(rxq); 1758 } 1759 1760 static void mana_poll_rx_cq(struct mana_cq *cq) 1761 { 1762 struct gdma_comp *comp = cq->gdma_comp_buf; 1763 struct mana_rxq *rxq = cq->rxq; 1764 int comp_read, i; 1765 1766 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1767 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1768 1769 rxq->xdp_flush = false; 1770 1771 for (i = 0; i < comp_read; i++) { 1772 if (WARN_ON_ONCE(comp[i].is_sq)) 1773 return; 1774 1775 /* verify recv cqe references the right rxq */ 1776 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1777 return; 1778 1779 mana_process_rx_cqe(rxq, cq, &comp[i]); 1780 } 1781 1782 if (comp_read > 0) { 1783 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1784 1785 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 1786 } 1787 1788 if (rxq->xdp_flush) 1789 xdp_do_flush(); 1790 } 1791 1792 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1793 { 1794 struct mana_cq *cq = context; 1795 int w; 1796 1797 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1798 1799 if (cq->type == MANA_CQ_TYPE_RX) 1800 mana_poll_rx_cq(cq); 1801 else 1802 mana_poll_tx_cq(cq); 1803 1804 w = cq->work_done; 1805 cq->work_done_since_doorbell += w; 1806 1807 if (w < cq->budget) { 1808 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT); 1809 cq->work_done_since_doorbell = 0; 1810 napi_complete_done(&cq->napi, w); 1811 } else if (cq->work_done_since_doorbell > 1812 cq->gdma_cq->queue_size / COMP_ENTRY_SIZE * 4) { 1813 /* MANA hardware requires at least one doorbell ring every 8 1814 * wraparounds of CQ even if there is no need to arm the CQ. 1815 * This driver rings the doorbell as soon as we have exceeded 1816 * 4 wraparounds. 1817 */ 1818 mana_gd_ring_cq(gdma_queue, 0); 1819 cq->work_done_since_doorbell = 0; 1820 } 1821 1822 return w; 1823 } 1824 1825 static int mana_poll(struct napi_struct *napi, int budget) 1826 { 1827 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1828 int w; 1829 1830 cq->work_done = 0; 1831 cq->budget = budget; 1832 1833 w = mana_cq_handler(cq, cq->gdma_cq); 1834 1835 return min(w, budget); 1836 } 1837 1838 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1839 { 1840 struct mana_cq *cq = context; 1841 1842 napi_schedule_irqoff(&cq->napi); 1843 } 1844 1845 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1846 { 1847 struct gdma_dev *gd = apc->ac->gdma_dev; 1848 1849 if (!cq->gdma_cq) 1850 return; 1851 1852 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1853 } 1854 1855 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1856 { 1857 struct gdma_dev *gd = apc->ac->gdma_dev; 1858 1859 if (!txq->gdma_sq) 1860 return; 1861 1862 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1863 } 1864 1865 static void mana_destroy_txq(struct mana_port_context *apc) 1866 { 1867 struct napi_struct *napi; 1868 int i; 1869 1870 if (!apc->tx_qp) 1871 return; 1872 1873 for (i = 0; i < apc->num_queues; i++) { 1874 napi = &apc->tx_qp[i].tx_cq.napi; 1875 if (apc->tx_qp[i].txq.napi_initialized) { 1876 napi_synchronize(napi); 1877 napi_disable(napi); 1878 netif_napi_del(napi); 1879 apc->tx_qp[i].txq.napi_initialized = false; 1880 } 1881 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1882 1883 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1884 1885 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1886 } 1887 1888 kfree(apc->tx_qp); 1889 apc->tx_qp = NULL; 1890 } 1891 1892 static int mana_create_txq(struct mana_port_context *apc, 1893 struct net_device *net) 1894 { 1895 struct mana_context *ac = apc->ac; 1896 struct gdma_dev *gd = ac->gdma_dev; 1897 struct mana_obj_spec wq_spec; 1898 struct mana_obj_spec cq_spec; 1899 struct gdma_queue_spec spec; 1900 struct gdma_context *gc; 1901 struct mana_txq *txq; 1902 struct mana_cq *cq; 1903 u32 txq_size; 1904 u32 cq_size; 1905 int err; 1906 int i; 1907 1908 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1909 GFP_KERNEL); 1910 if (!apc->tx_qp) 1911 return -ENOMEM; 1912 1913 /* The minimum size of the WQE is 32 bytes, hence 1914 * apc->tx_queue_size represents the maximum number of WQEs 1915 * the SQ can store. This value is then used to size other queues 1916 * to prevent overflow. 1917 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED, 1918 * as min val of apc->tx_queue_size is 128 and that would make 1919 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size 1920 * are always power of two 1921 */ 1922 txq_size = apc->tx_queue_size * 32; 1923 1924 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE; 1925 1926 gc = gd->gdma_context; 1927 1928 for (i = 0; i < apc->num_queues; i++) { 1929 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1930 1931 /* Create SQ */ 1932 txq = &apc->tx_qp[i].txq; 1933 1934 u64_stats_init(&txq->stats.syncp); 1935 txq->ndev = net; 1936 txq->net_txq = netdev_get_tx_queue(net, i); 1937 txq->vp_offset = apc->tx_vp_offset; 1938 txq->napi_initialized = false; 1939 skb_queue_head_init(&txq->pending_skbs); 1940 1941 memset(&spec, 0, sizeof(spec)); 1942 spec.type = GDMA_SQ; 1943 spec.monitor_avl_buf = true; 1944 spec.queue_size = txq_size; 1945 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 1946 if (err) 1947 goto out; 1948 1949 /* Create SQ's CQ */ 1950 cq = &apc->tx_qp[i].tx_cq; 1951 cq->type = MANA_CQ_TYPE_TX; 1952 1953 cq->txq = txq; 1954 1955 memset(&spec, 0, sizeof(spec)); 1956 spec.type = GDMA_CQ; 1957 spec.monitor_avl_buf = false; 1958 spec.queue_size = cq_size; 1959 spec.cq.callback = mana_schedule_napi; 1960 spec.cq.parent_eq = ac->eqs[i].eq; 1961 spec.cq.context = cq; 1962 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 1963 if (err) 1964 goto out; 1965 1966 memset(&wq_spec, 0, sizeof(wq_spec)); 1967 memset(&cq_spec, 0, sizeof(cq_spec)); 1968 1969 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 1970 wq_spec.queue_size = txq->gdma_sq->queue_size; 1971 1972 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 1973 cq_spec.queue_size = cq->gdma_cq->queue_size; 1974 cq_spec.modr_ctx_id = 0; 1975 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 1976 1977 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 1978 &wq_spec, &cq_spec, 1979 &apc->tx_qp[i].tx_object); 1980 1981 if (err) 1982 goto out; 1983 1984 txq->gdma_sq->id = wq_spec.queue_index; 1985 cq->gdma_cq->id = cq_spec.queue_index; 1986 1987 txq->gdma_sq->mem_info.dma_region_handle = 1988 GDMA_INVALID_DMA_REGION; 1989 cq->gdma_cq->mem_info.dma_region_handle = 1990 GDMA_INVALID_DMA_REGION; 1991 1992 txq->gdma_txq_id = txq->gdma_sq->id; 1993 1994 cq->gdma_id = cq->gdma_cq->id; 1995 1996 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 1997 err = -EINVAL; 1998 goto out; 1999 } 2000 2001 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2002 2003 netif_napi_add_tx(net, &cq->napi, mana_poll); 2004 napi_enable(&cq->napi); 2005 txq->napi_initialized = true; 2006 2007 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2008 } 2009 2010 return 0; 2011 out: 2012 mana_destroy_txq(apc); 2013 return err; 2014 } 2015 2016 static void mana_destroy_rxq(struct mana_port_context *apc, 2017 struct mana_rxq *rxq, bool napi_initialized) 2018 2019 { 2020 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2021 struct mana_recv_buf_oob *rx_oob; 2022 struct device *dev = gc->dev; 2023 struct napi_struct *napi; 2024 struct page *page; 2025 int i; 2026 2027 if (!rxq) 2028 return; 2029 2030 napi = &rxq->rx_cq.napi; 2031 2032 if (napi_initialized) { 2033 napi_synchronize(napi); 2034 2035 napi_disable(napi); 2036 2037 netif_napi_del(napi); 2038 } 2039 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2040 2041 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2042 2043 mana_deinit_cq(apc, &rxq->rx_cq); 2044 2045 if (rxq->xdp_save_va) 2046 put_page(virt_to_head_page(rxq->xdp_save_va)); 2047 2048 for (i = 0; i < rxq->num_rx_buf; i++) { 2049 rx_oob = &rxq->rx_oobs[i]; 2050 2051 if (!rx_oob->buf_va) 2052 continue; 2053 2054 dma_unmap_single(dev, rx_oob->sgl[0].address, 2055 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2056 2057 page = virt_to_head_page(rx_oob->buf_va); 2058 2059 if (rx_oob->from_pool) 2060 page_pool_put_full_page(rxq->page_pool, page, false); 2061 else 2062 put_page(page); 2063 2064 rx_oob->buf_va = NULL; 2065 } 2066 2067 page_pool_destroy(rxq->page_pool); 2068 2069 if (rxq->gdma_rq) 2070 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2071 2072 kfree(rxq); 2073 } 2074 2075 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2076 struct mana_rxq *rxq, struct device *dev) 2077 { 2078 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2079 bool from_pool = false; 2080 dma_addr_t da; 2081 void *va; 2082 2083 if (mpc->rxbufs_pre) 2084 va = mana_get_rxbuf_pre(rxq, &da); 2085 else 2086 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, false); 2087 2088 if (!va) 2089 return -ENOMEM; 2090 2091 rx_oob->buf_va = va; 2092 rx_oob->from_pool = from_pool; 2093 2094 rx_oob->sgl[0].address = da; 2095 rx_oob->sgl[0].size = rxq->datasize; 2096 rx_oob->sgl[0].mem_key = mem_key; 2097 2098 return 0; 2099 } 2100 2101 #define MANA_WQE_HEADER_SIZE 16 2102 #define MANA_WQE_SGE_SIZE 16 2103 2104 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2105 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2106 { 2107 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2108 struct mana_recv_buf_oob *rx_oob; 2109 struct device *dev = gc->dev; 2110 u32 buf_idx; 2111 int ret; 2112 2113 WARN_ON(rxq->datasize == 0); 2114 2115 *rxq_size = 0; 2116 *cq_size = 0; 2117 2118 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2119 rx_oob = &rxq->rx_oobs[buf_idx]; 2120 memset(rx_oob, 0, sizeof(*rx_oob)); 2121 2122 rx_oob->num_sge = 1; 2123 2124 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2125 dev); 2126 if (ret) 2127 return ret; 2128 2129 rx_oob->wqe_req.sgl = rx_oob->sgl; 2130 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2131 rx_oob->wqe_req.inline_oob_size = 0; 2132 rx_oob->wqe_req.inline_oob_data = NULL; 2133 rx_oob->wqe_req.flags = 0; 2134 rx_oob->wqe_req.client_data_unit = 0; 2135 2136 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2137 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2138 *cq_size += COMP_ENTRY_SIZE; 2139 } 2140 2141 return 0; 2142 } 2143 2144 static int mana_push_wqe(struct mana_rxq *rxq) 2145 { 2146 struct mana_recv_buf_oob *rx_oob; 2147 u32 buf_idx; 2148 int err; 2149 2150 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2151 rx_oob = &rxq->rx_oobs[buf_idx]; 2152 2153 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2154 &rx_oob->wqe_inf); 2155 if (err) 2156 return -ENOSPC; 2157 } 2158 2159 return 0; 2160 } 2161 2162 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2163 { 2164 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2165 struct page_pool_params pprm = {}; 2166 int ret; 2167 2168 pprm.pool_size = mpc->rx_queue_size; 2169 pprm.nid = gc->numa_node; 2170 pprm.napi = &rxq->rx_cq.napi; 2171 pprm.netdev = rxq->ndev; 2172 2173 rxq->page_pool = page_pool_create(&pprm); 2174 2175 if (IS_ERR(rxq->page_pool)) { 2176 ret = PTR_ERR(rxq->page_pool); 2177 rxq->page_pool = NULL; 2178 return ret; 2179 } 2180 2181 return 0; 2182 } 2183 2184 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2185 u32 rxq_idx, struct mana_eq *eq, 2186 struct net_device *ndev) 2187 { 2188 struct gdma_dev *gd = apc->ac->gdma_dev; 2189 struct mana_obj_spec wq_spec; 2190 struct mana_obj_spec cq_spec; 2191 struct gdma_queue_spec spec; 2192 struct mana_cq *cq = NULL; 2193 struct gdma_context *gc; 2194 u32 cq_size, rq_size; 2195 struct mana_rxq *rxq; 2196 int err; 2197 2198 gc = gd->gdma_context; 2199 2200 rxq = kzalloc(struct_size(rxq, rx_oobs, apc->rx_queue_size), 2201 GFP_KERNEL); 2202 if (!rxq) 2203 return NULL; 2204 2205 rxq->ndev = ndev; 2206 rxq->num_rx_buf = apc->rx_queue_size; 2207 rxq->rxq_idx = rxq_idx; 2208 rxq->rxobj = INVALID_MANA_HANDLE; 2209 2210 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2211 &rxq->headroom); 2212 2213 /* Create page pool for RX queue */ 2214 err = mana_create_page_pool(rxq, gc); 2215 if (err) { 2216 netdev_err(ndev, "Create page pool err:%d\n", err); 2217 goto out; 2218 } 2219 2220 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2221 if (err) 2222 goto out; 2223 2224 rq_size = MANA_PAGE_ALIGN(rq_size); 2225 cq_size = MANA_PAGE_ALIGN(cq_size); 2226 2227 /* Create RQ */ 2228 memset(&spec, 0, sizeof(spec)); 2229 spec.type = GDMA_RQ; 2230 spec.monitor_avl_buf = true; 2231 spec.queue_size = rq_size; 2232 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2233 if (err) 2234 goto out; 2235 2236 /* Create RQ's CQ */ 2237 cq = &rxq->rx_cq; 2238 cq->type = MANA_CQ_TYPE_RX; 2239 cq->rxq = rxq; 2240 2241 memset(&spec, 0, sizeof(spec)); 2242 spec.type = GDMA_CQ; 2243 spec.monitor_avl_buf = false; 2244 spec.queue_size = cq_size; 2245 spec.cq.callback = mana_schedule_napi; 2246 spec.cq.parent_eq = eq->eq; 2247 spec.cq.context = cq; 2248 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2249 if (err) 2250 goto out; 2251 2252 memset(&wq_spec, 0, sizeof(wq_spec)); 2253 memset(&cq_spec, 0, sizeof(cq_spec)); 2254 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2255 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2256 2257 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2258 cq_spec.queue_size = cq->gdma_cq->queue_size; 2259 cq_spec.modr_ctx_id = 0; 2260 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2261 2262 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2263 &wq_spec, &cq_spec, &rxq->rxobj); 2264 if (err) 2265 goto out; 2266 2267 rxq->gdma_rq->id = wq_spec.queue_index; 2268 cq->gdma_cq->id = cq_spec.queue_index; 2269 2270 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2271 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2272 2273 rxq->gdma_id = rxq->gdma_rq->id; 2274 cq->gdma_id = cq->gdma_cq->id; 2275 2276 err = mana_push_wqe(rxq); 2277 if (err) 2278 goto out; 2279 2280 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2281 err = -EINVAL; 2282 goto out; 2283 } 2284 2285 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2286 2287 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2288 2289 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2290 cq->napi.napi_id)); 2291 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2292 rxq->page_pool)); 2293 2294 napi_enable(&cq->napi); 2295 2296 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2297 out: 2298 if (!err) 2299 return rxq; 2300 2301 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2302 2303 mana_destroy_rxq(apc, rxq, false); 2304 2305 if (cq) 2306 mana_deinit_cq(apc, cq); 2307 2308 return NULL; 2309 } 2310 2311 static int mana_add_rx_queues(struct mana_port_context *apc, 2312 struct net_device *ndev) 2313 { 2314 struct mana_context *ac = apc->ac; 2315 struct mana_rxq *rxq; 2316 int err = 0; 2317 int i; 2318 2319 for (i = 0; i < apc->num_queues; i++) { 2320 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2321 if (!rxq) { 2322 err = -ENOMEM; 2323 goto out; 2324 } 2325 2326 u64_stats_init(&rxq->stats.syncp); 2327 2328 apc->rxqs[i] = rxq; 2329 } 2330 2331 apc->default_rxobj = apc->rxqs[0]->rxobj; 2332 out: 2333 return err; 2334 } 2335 2336 static void mana_destroy_vport(struct mana_port_context *apc) 2337 { 2338 struct gdma_dev *gd = apc->ac->gdma_dev; 2339 struct mana_rxq *rxq; 2340 u32 rxq_idx; 2341 2342 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2343 rxq = apc->rxqs[rxq_idx]; 2344 if (!rxq) 2345 continue; 2346 2347 mana_destroy_rxq(apc, rxq, true); 2348 apc->rxqs[rxq_idx] = NULL; 2349 } 2350 2351 mana_destroy_txq(apc); 2352 mana_uncfg_vport(apc); 2353 2354 if (gd->gdma_context->is_pf) 2355 mana_pf_deregister_hw_vport(apc); 2356 } 2357 2358 static int mana_create_vport(struct mana_port_context *apc, 2359 struct net_device *net) 2360 { 2361 struct gdma_dev *gd = apc->ac->gdma_dev; 2362 int err; 2363 2364 apc->default_rxobj = INVALID_MANA_HANDLE; 2365 2366 if (gd->gdma_context->is_pf) { 2367 err = mana_pf_register_hw_vport(apc); 2368 if (err) 2369 return err; 2370 } 2371 2372 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2373 if (err) 2374 return err; 2375 2376 return mana_create_txq(apc, net); 2377 } 2378 2379 static int mana_rss_table_alloc(struct mana_port_context *apc) 2380 { 2381 if (!apc->indir_table_sz) { 2382 netdev_err(apc->ndev, 2383 "Indirection table size not set for vPort %d\n", 2384 apc->port_idx); 2385 return -EINVAL; 2386 } 2387 2388 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL); 2389 if (!apc->indir_table) 2390 return -ENOMEM; 2391 2392 apc->rxobj_table = kcalloc(apc->indir_table_sz, sizeof(mana_handle_t), GFP_KERNEL); 2393 if (!apc->rxobj_table) { 2394 kfree(apc->indir_table); 2395 return -ENOMEM; 2396 } 2397 2398 return 0; 2399 } 2400 2401 static void mana_rss_table_init(struct mana_port_context *apc) 2402 { 2403 int i; 2404 2405 for (i = 0; i < apc->indir_table_sz; i++) 2406 apc->indir_table[i] = 2407 ethtool_rxfh_indir_default(i, apc->num_queues); 2408 } 2409 2410 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2411 bool update_hash, bool update_tab) 2412 { 2413 u32 queue_idx; 2414 int err; 2415 int i; 2416 2417 if (update_tab) { 2418 for (i = 0; i < apc->indir_table_sz; i++) { 2419 queue_idx = apc->indir_table[i]; 2420 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2421 } 2422 } 2423 2424 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2425 if (err) 2426 return err; 2427 2428 mana_fence_rqs(apc); 2429 2430 return 0; 2431 } 2432 2433 void mana_query_gf_stats(struct mana_port_context *apc) 2434 { 2435 struct mana_query_gf_stat_resp resp = {}; 2436 struct mana_query_gf_stat_req req = {}; 2437 struct net_device *ndev = apc->ndev; 2438 int err; 2439 2440 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2441 sizeof(req), sizeof(resp)); 2442 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE | 2443 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED | 2444 STATISTICS_FLAGS_HC_RX_BYTES | 2445 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS | 2446 STATISTICS_FLAGS_HC_RX_UCAST_BYTES | 2447 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS | 2448 STATISTICS_FLAGS_HC_RX_MCAST_BYTES | 2449 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS | 2450 STATISTICS_FLAGS_HC_RX_BCAST_BYTES | 2451 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED | 2452 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED | 2453 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS | 2454 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT | 2455 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT | 2456 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT | 2457 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT | 2458 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT | 2459 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION | 2460 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB | 2461 STATISTICS_FLAGS_HC_TX_BYTES | 2462 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2463 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2464 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2465 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2466 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2467 STATISTICS_FLAGS_HC_TX_BCAST_BYTES | 2468 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR; 2469 2470 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 2471 sizeof(resp)); 2472 if (err) { 2473 netdev_err(ndev, "Failed to query GF stats: %d\n", err); 2474 return; 2475 } 2476 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2477 sizeof(resp)); 2478 if (err || resp.hdr.status) { 2479 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err, 2480 resp.hdr.status); 2481 return; 2482 } 2483 2484 apc->eth_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe; 2485 apc->eth_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled; 2486 apc->eth_stats.hc_rx_bytes = resp.hc_rx_bytes; 2487 apc->eth_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts; 2488 apc->eth_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes; 2489 apc->eth_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts; 2490 apc->eth_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes; 2491 apc->eth_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts; 2492 apc->eth_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes; 2493 apc->eth_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled; 2494 apc->eth_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled; 2495 apc->eth_stats.hc_tx_err_inval_vportoffset_pkt = 2496 resp.tx_err_inval_vport_offset_pkt; 2497 apc->eth_stats.hc_tx_err_vlan_enforcement = 2498 resp.tx_err_vlan_enforcement; 2499 apc->eth_stats.hc_tx_err_eth_type_enforcement = 2500 resp.tx_err_ethtype_enforcement; 2501 apc->eth_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement; 2502 apc->eth_stats.hc_tx_err_sqpdid_enforcement = 2503 resp.tx_err_SQPDID_enforcement; 2504 apc->eth_stats.hc_tx_err_cqpdid_enforcement = 2505 resp.tx_err_CQPDID_enforcement; 2506 apc->eth_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation; 2507 apc->eth_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob; 2508 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes; 2509 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2510 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2511 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2512 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2513 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2514 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2515 apc->eth_stats.hc_tx_err_gdma = resp.tx_err_gdma; 2516 } 2517 2518 static int mana_init_port(struct net_device *ndev) 2519 { 2520 struct mana_port_context *apc = netdev_priv(ndev); 2521 u32 max_txq, max_rxq, max_queues; 2522 int port_idx = apc->port_idx; 2523 int err; 2524 2525 err = mana_init_port_context(apc); 2526 if (err) 2527 return err; 2528 2529 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2530 &apc->indir_table_sz); 2531 if (err) { 2532 netdev_err(ndev, "Failed to query info for vPort %d\n", 2533 port_idx); 2534 goto reset_apc; 2535 } 2536 2537 max_queues = min_t(u32, max_txq, max_rxq); 2538 if (apc->max_queues > max_queues) 2539 apc->max_queues = max_queues; 2540 2541 if (apc->num_queues > apc->max_queues) 2542 apc->num_queues = apc->max_queues; 2543 2544 eth_hw_addr_set(ndev, apc->mac_addr); 2545 2546 return 0; 2547 2548 reset_apc: 2549 mana_cleanup_port_context(apc); 2550 return err; 2551 } 2552 2553 int mana_alloc_queues(struct net_device *ndev) 2554 { 2555 struct mana_port_context *apc = netdev_priv(ndev); 2556 struct gdma_dev *gd = apc->ac->gdma_dev; 2557 int err; 2558 2559 err = mana_create_vport(apc, ndev); 2560 if (err) 2561 return err; 2562 2563 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2564 if (err) 2565 goto destroy_vport; 2566 2567 err = mana_add_rx_queues(apc, ndev); 2568 if (err) 2569 goto destroy_vport; 2570 2571 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2572 2573 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2574 if (err) 2575 goto destroy_vport; 2576 2577 mana_rss_table_init(apc); 2578 2579 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2580 if (err) 2581 goto destroy_vport; 2582 2583 if (gd->gdma_context->is_pf) { 2584 err = mana_pf_register_filter(apc); 2585 if (err) 2586 goto destroy_vport; 2587 } 2588 2589 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2590 2591 return 0; 2592 2593 destroy_vport: 2594 mana_destroy_vport(apc); 2595 return err; 2596 } 2597 2598 int mana_attach(struct net_device *ndev) 2599 { 2600 struct mana_port_context *apc = netdev_priv(ndev); 2601 int err; 2602 2603 ASSERT_RTNL(); 2604 2605 err = mana_init_port(ndev); 2606 if (err) 2607 return err; 2608 2609 if (apc->port_st_save) { 2610 err = mana_alloc_queues(ndev); 2611 if (err) { 2612 mana_cleanup_port_context(apc); 2613 return err; 2614 } 2615 } 2616 2617 apc->port_is_up = apc->port_st_save; 2618 2619 /* Ensure port state updated before txq state */ 2620 smp_wmb(); 2621 2622 if (apc->port_is_up) 2623 netif_carrier_on(ndev); 2624 2625 netif_device_attach(ndev); 2626 2627 return 0; 2628 } 2629 2630 static int mana_dealloc_queues(struct net_device *ndev) 2631 { 2632 struct mana_port_context *apc = netdev_priv(ndev); 2633 unsigned long timeout = jiffies + 120 * HZ; 2634 struct gdma_dev *gd = apc->ac->gdma_dev; 2635 struct mana_txq *txq; 2636 struct sk_buff *skb; 2637 int i, err; 2638 u32 tsleep; 2639 2640 if (apc->port_is_up) 2641 return -EINVAL; 2642 2643 mana_chn_setxdp(apc, NULL); 2644 2645 if (gd->gdma_context->is_pf) 2646 mana_pf_deregister_filter(apc); 2647 2648 /* No packet can be transmitted now since apc->port_is_up is false. 2649 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2650 * a txq because it may not timely see apc->port_is_up being cleared 2651 * to false, but it doesn't matter since mana_start_xmit() drops any 2652 * new packets due to apc->port_is_up being false. 2653 * 2654 * Drain all the in-flight TX packets. 2655 * A timeout of 120 seconds for all the queues is used. 2656 * This will break the while loop when h/w is not responding. 2657 * This value of 120 has been decided here considering max 2658 * number of queues. 2659 */ 2660 2661 for (i = 0; i < apc->num_queues; i++) { 2662 txq = &apc->tx_qp[i].txq; 2663 tsleep = 1000; 2664 while (atomic_read(&txq->pending_sends) > 0 && 2665 time_before(jiffies, timeout)) { 2666 usleep_range(tsleep, tsleep + 1000); 2667 tsleep <<= 1; 2668 } 2669 if (atomic_read(&txq->pending_sends)) { 2670 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 2671 if (err) { 2672 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 2673 err, atomic_read(&txq->pending_sends), 2674 txq->gdma_txq_id); 2675 } 2676 break; 2677 } 2678 } 2679 2680 for (i = 0; i < apc->num_queues; i++) { 2681 txq = &apc->tx_qp[i].txq; 2682 while ((skb = skb_dequeue(&txq->pending_skbs))) { 2683 mana_unmap_skb(skb, apc); 2684 dev_kfree_skb_any(skb); 2685 } 2686 atomic_set(&txq->pending_sends, 0); 2687 } 2688 /* We're 100% sure the queues can no longer be woken up, because 2689 * we're sure now mana_poll_tx_cq() can't be running. 2690 */ 2691 2692 apc->rss_state = TRI_STATE_FALSE; 2693 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2694 if (err) { 2695 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2696 return err; 2697 } 2698 2699 mana_destroy_vport(apc); 2700 2701 return 0; 2702 } 2703 2704 int mana_detach(struct net_device *ndev, bool from_close) 2705 { 2706 struct mana_port_context *apc = netdev_priv(ndev); 2707 int err; 2708 2709 ASSERT_RTNL(); 2710 2711 apc->port_st_save = apc->port_is_up; 2712 apc->port_is_up = false; 2713 2714 /* Ensure port state updated before txq state */ 2715 smp_wmb(); 2716 2717 netif_tx_disable(ndev); 2718 netif_carrier_off(ndev); 2719 2720 if (apc->port_st_save) { 2721 err = mana_dealloc_queues(ndev); 2722 if (err) 2723 return err; 2724 } 2725 2726 if (!from_close) { 2727 netif_device_detach(ndev); 2728 mana_cleanup_port_context(apc); 2729 } 2730 2731 return 0; 2732 } 2733 2734 static int mana_probe_port(struct mana_context *ac, int port_idx, 2735 struct net_device **ndev_storage) 2736 { 2737 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2738 struct mana_port_context *apc; 2739 struct net_device *ndev; 2740 int err; 2741 2742 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2743 gc->max_num_queues); 2744 if (!ndev) 2745 return -ENOMEM; 2746 2747 *ndev_storage = ndev; 2748 2749 apc = netdev_priv(ndev); 2750 apc->ac = ac; 2751 apc->ndev = ndev; 2752 apc->max_queues = gc->max_num_queues; 2753 apc->num_queues = gc->max_num_queues; 2754 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE; 2755 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE; 2756 apc->port_handle = INVALID_MANA_HANDLE; 2757 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2758 apc->port_idx = port_idx; 2759 2760 mutex_init(&apc->vport_mutex); 2761 apc->vport_use_count = 0; 2762 2763 ndev->netdev_ops = &mana_devops; 2764 ndev->ethtool_ops = &mana_ethtool_ops; 2765 ndev->mtu = ETH_DATA_LEN; 2766 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2767 ndev->min_mtu = ETH_MIN_MTU; 2768 ndev->needed_headroom = MANA_HEADROOM; 2769 ndev->dev_port = port_idx; 2770 SET_NETDEV_DEV(ndev, gc->dev); 2771 2772 netif_carrier_off(ndev); 2773 2774 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2775 2776 err = mana_init_port(ndev); 2777 if (err) 2778 goto free_net; 2779 2780 err = mana_rss_table_alloc(apc); 2781 if (err) 2782 goto reset_apc; 2783 2784 netdev_lockdep_set_classes(ndev); 2785 2786 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2787 ndev->hw_features |= NETIF_F_RXCSUM; 2788 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2789 ndev->hw_features |= NETIF_F_RXHASH; 2790 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2791 NETIF_F_HW_VLAN_CTAG_RX; 2792 ndev->vlan_features = ndev->features; 2793 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 2794 NETDEV_XDP_ACT_REDIRECT | 2795 NETDEV_XDP_ACT_NDO_XMIT); 2796 2797 err = register_netdev(ndev); 2798 if (err) { 2799 netdev_err(ndev, "Unable to register netdev.\n"); 2800 goto free_indir; 2801 } 2802 2803 return 0; 2804 2805 free_indir: 2806 mana_cleanup_indir_table(apc); 2807 reset_apc: 2808 mana_cleanup_port_context(apc); 2809 free_net: 2810 *ndev_storage = NULL; 2811 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2812 free_netdev(ndev); 2813 return err; 2814 } 2815 2816 static void adev_release(struct device *dev) 2817 { 2818 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2819 2820 kfree(madev); 2821 } 2822 2823 static void remove_adev(struct gdma_dev *gd) 2824 { 2825 struct auxiliary_device *adev = gd->adev; 2826 int id = adev->id; 2827 2828 auxiliary_device_delete(adev); 2829 auxiliary_device_uninit(adev); 2830 2831 mana_adev_idx_free(id); 2832 gd->adev = NULL; 2833 } 2834 2835 static int add_adev(struct gdma_dev *gd) 2836 { 2837 struct auxiliary_device *adev; 2838 struct mana_adev *madev; 2839 int ret; 2840 2841 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2842 if (!madev) 2843 return -ENOMEM; 2844 2845 adev = &madev->adev; 2846 ret = mana_adev_idx_alloc(); 2847 if (ret < 0) 2848 goto idx_fail; 2849 adev->id = ret; 2850 2851 adev->name = "rdma"; 2852 adev->dev.parent = gd->gdma_context->dev; 2853 adev->dev.release = adev_release; 2854 madev->mdev = gd; 2855 2856 ret = auxiliary_device_init(adev); 2857 if (ret) 2858 goto init_fail; 2859 2860 /* madev is owned by the auxiliary device */ 2861 madev = NULL; 2862 ret = auxiliary_device_add(adev); 2863 if (ret) 2864 goto add_fail; 2865 2866 gd->adev = adev; 2867 return 0; 2868 2869 add_fail: 2870 auxiliary_device_uninit(adev); 2871 2872 init_fail: 2873 mana_adev_idx_free(adev->id); 2874 2875 idx_fail: 2876 kfree(madev); 2877 2878 return ret; 2879 } 2880 2881 int mana_probe(struct gdma_dev *gd, bool resuming) 2882 { 2883 struct gdma_context *gc = gd->gdma_context; 2884 struct mana_context *ac = gd->driver_data; 2885 struct device *dev = gc->dev; 2886 u16 num_ports = 0; 2887 int err; 2888 int i; 2889 2890 dev_info(dev, 2891 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2892 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2893 2894 err = mana_gd_register_device(gd); 2895 if (err) 2896 return err; 2897 2898 if (!resuming) { 2899 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 2900 if (!ac) 2901 return -ENOMEM; 2902 2903 ac->gdma_dev = gd; 2904 gd->driver_data = ac; 2905 } 2906 2907 err = mana_create_eq(ac); 2908 if (err) 2909 goto out; 2910 2911 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 2912 MANA_MICRO_VERSION, &num_ports); 2913 if (err) 2914 goto out; 2915 2916 if (!resuming) { 2917 ac->num_ports = num_ports; 2918 } else { 2919 if (ac->num_ports != num_ports) { 2920 dev_err(dev, "The number of vPorts changed: %d->%d\n", 2921 ac->num_ports, num_ports); 2922 err = -EPROTO; 2923 goto out; 2924 } 2925 } 2926 2927 if (ac->num_ports == 0) 2928 dev_err(dev, "Failed to detect any vPort\n"); 2929 2930 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 2931 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 2932 2933 if (!resuming) { 2934 for (i = 0; i < ac->num_ports; i++) { 2935 err = mana_probe_port(ac, i, &ac->ports[i]); 2936 /* we log the port for which the probe failed and stop 2937 * probes for subsequent ports. 2938 * Note that we keep running ports, for which the probes 2939 * were successful, unless add_adev fails too 2940 */ 2941 if (err) { 2942 dev_err(dev, "Probe Failed for port %d\n", i); 2943 break; 2944 } 2945 } 2946 } else { 2947 for (i = 0; i < ac->num_ports; i++) { 2948 rtnl_lock(); 2949 err = mana_attach(ac->ports[i]); 2950 rtnl_unlock(); 2951 /* we log the port for which the attach failed and stop 2952 * attach for subsequent ports 2953 * Note that we keep running ports, for which the attach 2954 * were successful, unless add_adev fails too 2955 */ 2956 if (err) { 2957 dev_err(dev, "Attach Failed for port %d\n", i); 2958 break; 2959 } 2960 } 2961 } 2962 2963 err = add_adev(gd); 2964 out: 2965 if (err) 2966 mana_remove(gd, false); 2967 2968 return err; 2969 } 2970 2971 void mana_remove(struct gdma_dev *gd, bool suspending) 2972 { 2973 struct gdma_context *gc = gd->gdma_context; 2974 struct mana_context *ac = gd->driver_data; 2975 struct mana_port_context *apc; 2976 struct device *dev = gc->dev; 2977 struct net_device *ndev; 2978 int err; 2979 int i; 2980 2981 /* adev currently doesn't support suspending, always remove it */ 2982 if (gd->adev) 2983 remove_adev(gd); 2984 2985 for (i = 0; i < ac->num_ports; i++) { 2986 ndev = ac->ports[i]; 2987 apc = netdev_priv(ndev); 2988 if (!ndev) { 2989 if (i == 0) 2990 dev_err(dev, "No net device to remove\n"); 2991 goto out; 2992 } 2993 2994 /* All cleanup actions should stay after rtnl_lock(), otherwise 2995 * other functions may access partially cleaned up data. 2996 */ 2997 rtnl_lock(); 2998 2999 err = mana_detach(ndev, false); 3000 if (err) 3001 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 3002 i, err); 3003 3004 if (suspending) { 3005 /* No need to unregister the ndev. */ 3006 rtnl_unlock(); 3007 continue; 3008 } 3009 3010 unregister_netdevice(ndev); 3011 mana_cleanup_indir_table(apc); 3012 3013 rtnl_unlock(); 3014 3015 free_netdev(ndev); 3016 } 3017 3018 mana_destroy_eq(ac); 3019 out: 3020 mana_gd_deregister_device(gd); 3021 3022 if (suspending) 3023 return; 3024 3025 gd->driver_data = NULL; 3026 gd->gdma_context = NULL; 3027 kfree(ac); 3028 } 3029 3030 struct net_device *mana_get_primary_netdev_rcu(struct mana_context *ac, u32 port_index) 3031 { 3032 struct net_device *ndev; 3033 3034 RCU_LOCKDEP_WARN(!rcu_read_lock_held(), 3035 "Taking primary netdev without holding the RCU read lock"); 3036 if (port_index >= ac->num_ports) 3037 return NULL; 3038 3039 /* When mana is used in netvsc, the upper netdevice should be returned. */ 3040 if (ac->ports[port_index]->flags & IFF_SLAVE) 3041 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]); 3042 else 3043 ndev = ac->ports[port_index]; 3044 3045 return ndev; 3046 } 3047 EXPORT_SYMBOL_NS(mana_get_primary_netdev_rcu, NET_MANA); 3048