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 21static DEFINE_IDA(mana_adev_ida); 22 23static int mana_adev_idx_alloc(void) 24{ 25 return ida_alloc(&mana_adev_ida, GFP_KERNEL); 26} 27 28static 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 35static 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 55static 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 65static bool mana_can_tx(struct gdma_queue *wq) 66{ 67 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE; 68} 69 70static 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 94static 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 105static 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 162frag_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 */ 181static 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 */ 202static 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 220netdev_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 415tx_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 424free_sgl_ptr: 425 kfree(pkg.sgl_ptr); 426tx_drop_count: 427 ndev->stats.tx_dropped++; 428tx_drop: 429 dev_kfree_skb_any(skb); 430 return NETDEV_TX_OK; 431} 432 433static 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 476static 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 493static 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 */ 514static 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 537out2: 538 kfree(mpc->rxbufs_pre); 539 mpc->rxbufs_pre = NULL; 540 541out1: 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 */ 548static 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 */ 594static 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 = mtu + ETH_HLEN; 605} 606 607static 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 669error: 670 mana_pre_dealloc_rxbufs(mpc); 671 return -ENOMEM; 672} 673 674static 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 701out: 702 mana_pre_dealloc_rxbufs(mpc); 703 return err; 704} 705 706static 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 718static void mana_cleanup_port_context(struct mana_port_context *apc) 719{ 720 kfree(apc->rxqs); 721 apc->rxqs = NULL; 722} 723 724static 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 732static 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 764static 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 780static 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 811static 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 837static 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 867static 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 893static 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 938static 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 973void 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} 980EXPORT_SYMBOL_NS(mana_uncfg_vport, NET_MANA); 981 982int 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); 1044out: 1045 if (err) 1046 mana_uncfg_vport(apc); 1047 1048 return err; 1049} 1050EXPORT_SYMBOL_NS(mana_cfg_vport, NET_MANA); 1051 1052static 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); 1117out: 1118 kfree(req); 1119 return err; 1120} 1121 1122int 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; 1172out: 1173 return err; 1174} 1175EXPORT_SYMBOL_NS(mana_create_wq_obj, NET_MANA); 1176 1177void 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} 1203EXPORT_SYMBOL_NS(mana_destroy_wq_obj, NET_MANA); 1204 1205static 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 1226static 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 spec.eq.msix_index = (i + 1) % gc->num_msix_usable; 1248 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1249 if (err) 1250 goto out; 1251 } 1252 1253 return 0; 1254out: 1255 mana_destroy_eq(ac); 1256 return err; 1257} 1258 1259static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1260{ 1261 struct mana_fence_rq_resp resp = {}; 1262 struct mana_fence_rq_req req = {}; 1263 int err; 1264 1265 init_completion(&rxq->fence_event); 1266 1267 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1268 sizeof(req), sizeof(resp)); 1269 req.wq_obj_handle = rxq->rxobj; 1270 1271 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1272 sizeof(resp)); 1273 if (err) { 1274 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1275 rxq->rxq_idx, err); 1276 return err; 1277 } 1278 1279 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1280 if (err || resp.hdr.status) { 1281 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1282 rxq->rxq_idx, err, resp.hdr.status); 1283 if (!err) 1284 err = -EPROTO; 1285 1286 return err; 1287 } 1288 1289 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1290 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1291 rxq->rxq_idx); 1292 return -ETIMEDOUT; 1293 } 1294 1295 return 0; 1296} 1297 1298static void mana_fence_rqs(struct mana_port_context *apc) 1299{ 1300 unsigned int rxq_idx; 1301 struct mana_rxq *rxq; 1302 int err; 1303 1304 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1305 rxq = apc->rxqs[rxq_idx]; 1306 err = mana_fence_rq(apc, rxq); 1307 1308 /* In case of any error, use sleep instead. */ 1309 if (err) 1310 msleep(100); 1311 } 1312} 1313 1314static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1315{ 1316 u32 used_space_old; 1317 u32 used_space_new; 1318 1319 used_space_old = wq->head - wq->tail; 1320 used_space_new = wq->head - (wq->tail + num_units); 1321 1322 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1323 return -ERANGE; 1324 1325 wq->tail += num_units; 1326 return 0; 1327} 1328 1329static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1330{ 1331 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1332 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1333 struct device *dev = gc->dev; 1334 int hsg, i; 1335 1336 /* Number of SGEs of linear part */ 1337 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1338 1339 for (i = 0; i < hsg; i++) 1340 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1341 DMA_TO_DEVICE); 1342 1343 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1344 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1345 DMA_TO_DEVICE); 1346} 1347 1348static void mana_poll_tx_cq(struct mana_cq *cq) 1349{ 1350 struct gdma_comp *completions = cq->gdma_comp_buf; 1351 struct gdma_posted_wqe_info *wqe_info; 1352 unsigned int pkt_transmitted = 0; 1353 unsigned int wqe_unit_cnt = 0; 1354 struct mana_txq *txq = cq->txq; 1355 struct mana_port_context *apc; 1356 struct netdev_queue *net_txq; 1357 struct gdma_queue *gdma_wq; 1358 unsigned int avail_space; 1359 struct net_device *ndev; 1360 struct sk_buff *skb; 1361 bool txq_stopped; 1362 int comp_read; 1363 int i; 1364 1365 ndev = txq->ndev; 1366 apc = netdev_priv(ndev); 1367 1368 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1369 CQE_POLLING_BUFFER); 1370 1371 if (comp_read < 1) 1372 return; 1373 1374 for (i = 0; i < comp_read; i++) { 1375 struct mana_tx_comp_oob *cqe_oob; 1376 1377 if (WARN_ON_ONCE(!completions[i].is_sq)) 1378 return; 1379 1380 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1381 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1382 MANA_CQE_COMPLETION)) 1383 return; 1384 1385 switch (cqe_oob->cqe_hdr.cqe_type) { 1386 case CQE_TX_OKAY: 1387 break; 1388 1389 case CQE_TX_SA_DROP: 1390 case CQE_TX_MTU_DROP: 1391 case CQE_TX_INVALID_OOB: 1392 case CQE_TX_INVALID_ETH_TYPE: 1393 case CQE_TX_HDR_PROCESSING_ERROR: 1394 case CQE_TX_VF_DISABLED: 1395 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1396 case CQE_TX_VPORT_DISABLED: 1397 case CQE_TX_VLAN_TAGGING_VIOLATION: 1398 if (net_ratelimit()) 1399 netdev_err(ndev, "TX: CQE error %d\n", 1400 cqe_oob->cqe_hdr.cqe_type); 1401 1402 apc->eth_stats.tx_cqe_err++; 1403 break; 1404 1405 default: 1406 /* If the CQE type is unknown, log an error, 1407 * and still free the SKB, update tail, etc. 1408 */ 1409 if (net_ratelimit()) 1410 netdev_err(ndev, "TX: unknown CQE type %d\n", 1411 cqe_oob->cqe_hdr.cqe_type); 1412 1413 apc->eth_stats.tx_cqe_unknown_type++; 1414 break; 1415 } 1416 1417 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1418 return; 1419 1420 skb = skb_dequeue(&txq->pending_skbs); 1421 if (WARN_ON_ONCE(!skb)) 1422 return; 1423 1424 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1425 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1426 1427 mana_unmap_skb(skb, apc); 1428 1429 napi_consume_skb(skb, cq->budget); 1430 1431 pkt_transmitted++; 1432 } 1433 1434 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1435 return; 1436 1437 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1438 1439 gdma_wq = txq->gdma_sq; 1440 avail_space = mana_gd_wq_avail_space(gdma_wq); 1441 1442 /* Ensure tail updated before checking q stop */ 1443 smp_mb(); 1444 1445 net_txq = txq->net_txq; 1446 txq_stopped = netif_tx_queue_stopped(net_txq); 1447 1448 /* Ensure checking txq_stopped before apc->port_is_up. */ 1449 smp_rmb(); 1450 1451 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1452 netif_tx_wake_queue(net_txq); 1453 apc->eth_stats.wake_queue++; 1454 } 1455 1456 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1457 WARN_ON_ONCE(1); 1458 1459 cq->work_done = pkt_transmitted; 1460} 1461 1462static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1463{ 1464 struct mana_recv_buf_oob *recv_buf_oob; 1465 u32 curr_index; 1466 int err; 1467 1468 curr_index = rxq->buf_index++; 1469 if (rxq->buf_index == rxq->num_rx_buf) 1470 rxq->buf_index = 0; 1471 1472 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1473 1474 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1475 &recv_buf_oob->wqe_inf); 1476 if (WARN_ON_ONCE(err)) 1477 return; 1478 1479 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1480} 1481 1482static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1483 uint pkt_len, struct xdp_buff *xdp) 1484{ 1485 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1486 1487 if (!skb) 1488 return NULL; 1489 1490 if (xdp->data_hard_start) { 1491 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1492 skb_put(skb, xdp->data_end - xdp->data); 1493 return skb; 1494 } 1495 1496 skb_reserve(skb, rxq->headroom); 1497 skb_put(skb, pkt_len); 1498 1499 return skb; 1500} 1501 1502static void mana_rx_skb(void *buf_va, bool from_pool, 1503 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) 1504{ 1505 struct mana_stats_rx *rx_stats = &rxq->stats; 1506 struct net_device *ndev = rxq->ndev; 1507 uint pkt_len = cqe->ppi[0].pkt_len; 1508 u16 rxq_idx = rxq->rxq_idx; 1509 struct napi_struct *napi; 1510 struct xdp_buff xdp = {}; 1511 struct sk_buff *skb; 1512 u32 hash_value; 1513 u32 act; 1514 1515 rxq->rx_cq.work_done++; 1516 napi = &rxq->rx_cq.napi; 1517 1518 if (!buf_va) { 1519 ++ndev->stats.rx_dropped; 1520 return; 1521 } 1522 1523 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1524 1525 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1526 return; 1527 1528 if (act != XDP_PASS && act != XDP_TX) 1529 goto drop_xdp; 1530 1531 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1532 1533 if (!skb) 1534 goto drop; 1535 1536 if (from_pool) 1537 skb_mark_for_recycle(skb); 1538 1539 skb->dev = napi->dev; 1540 1541 skb->protocol = eth_type_trans(skb, ndev); 1542 skb_checksum_none_assert(skb); 1543 skb_record_rx_queue(skb, rxq_idx); 1544 1545 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1546 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1547 skb->ip_summed = CHECKSUM_UNNECESSARY; 1548 } 1549 1550 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1551 hash_value = cqe->ppi[0].pkt_hash; 1552 1553 if (cqe->rx_hashtype & MANA_HASH_L4) 1554 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1555 else 1556 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1557 } 1558 1559 if (cqe->rx_vlantag_present) { 1560 u16 vlan_tci = cqe->rx_vlan_id; 1561 1562 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1563 } 1564 1565 u64_stats_update_begin(&rx_stats->syncp); 1566 rx_stats->packets++; 1567 rx_stats->bytes += pkt_len; 1568 1569 if (act == XDP_TX) 1570 rx_stats->xdp_tx++; 1571 u64_stats_update_end(&rx_stats->syncp); 1572 1573 if (act == XDP_TX) { 1574 skb_set_queue_mapping(skb, rxq_idx); 1575 mana_xdp_tx(skb, ndev); 1576 return; 1577 } 1578 1579 napi_gro_receive(napi, skb); 1580 1581 return; 1582 1583drop_xdp: 1584 u64_stats_update_begin(&rx_stats->syncp); 1585 rx_stats->xdp_drop++; 1586 u64_stats_update_end(&rx_stats->syncp); 1587 1588drop: 1589 if (from_pool) { 1590 page_pool_recycle_direct(rxq->page_pool, 1591 virt_to_head_page(buf_va)); 1592 } else { 1593 WARN_ON_ONCE(rxq->xdp_save_va); 1594 /* Save for reuse */ 1595 rxq->xdp_save_va = buf_va; 1596 } 1597 1598 ++ndev->stats.rx_dropped; 1599 1600 return; 1601} 1602 1603static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 1604 dma_addr_t *da, bool *from_pool, bool is_napi) 1605{ 1606 struct page *page; 1607 void *va; 1608 1609 *from_pool = false; 1610 1611 /* Reuse XDP dropped page if available */ 1612 if (rxq->xdp_save_va) { 1613 va = rxq->xdp_save_va; 1614 rxq->xdp_save_va = NULL; 1615 } else if (rxq->alloc_size > PAGE_SIZE) { 1616 if (is_napi) 1617 va = napi_alloc_frag(rxq->alloc_size); 1618 else 1619 va = netdev_alloc_frag(rxq->alloc_size); 1620 1621 if (!va) 1622 return NULL; 1623 1624 page = virt_to_head_page(va); 1625 /* Check if the frag falls back to single page */ 1626 if (compound_order(page) < get_order(rxq->alloc_size)) { 1627 put_page(page); 1628 return NULL; 1629 } 1630 } else { 1631 page = page_pool_dev_alloc_pages(rxq->page_pool); 1632 if (!page) 1633 return NULL; 1634 1635 *from_pool = true; 1636 va = page_to_virt(page); 1637 } 1638 1639 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 1640 DMA_FROM_DEVICE); 1641 if (dma_mapping_error(dev, *da)) { 1642 if (*from_pool) 1643 page_pool_put_full_page(rxq->page_pool, page, false); 1644 else 1645 put_page(virt_to_head_page(va)); 1646 1647 return NULL; 1648 } 1649 1650 return va; 1651} 1652 1653/* Allocate frag for rx buffer, and save the old buf */ 1654static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 1655 struct mana_recv_buf_oob *rxoob, void **old_buf, 1656 bool *old_fp) 1657{ 1658 bool from_pool; 1659 dma_addr_t da; 1660 void *va; 1661 1662 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, true); 1663 if (!va) 1664 return; 1665 1666 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 1667 DMA_FROM_DEVICE); 1668 *old_buf = rxoob->buf_va; 1669 *old_fp = rxoob->from_pool; 1670 1671 rxoob->buf_va = va; 1672 rxoob->sgl[0].address = da; 1673 rxoob->from_pool = from_pool; 1674} 1675 1676static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1677 struct gdma_comp *cqe) 1678{ 1679 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1680 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1681 struct net_device *ndev = rxq->ndev; 1682 struct mana_recv_buf_oob *rxbuf_oob; 1683 struct mana_port_context *apc; 1684 struct device *dev = gc->dev; 1685 void *old_buf = NULL; 1686 u32 curr, pktlen; 1687 bool old_fp; 1688 1689 apc = netdev_priv(ndev); 1690 1691 switch (oob->cqe_hdr.cqe_type) { 1692 case CQE_RX_OKAY: 1693 break; 1694 1695 case CQE_RX_TRUNCATED: 1696 ++ndev->stats.rx_dropped; 1697 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1698 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1699 goto drop; 1700 1701 case CQE_RX_COALESCED_4: 1702 netdev_err(ndev, "RX coalescing is unsupported\n"); 1703 apc->eth_stats.rx_coalesced_err++; 1704 return; 1705 1706 case CQE_RX_OBJECT_FENCE: 1707 complete(&rxq->fence_event); 1708 return; 1709 1710 default: 1711 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1712 oob->cqe_hdr.cqe_type); 1713 apc->eth_stats.rx_cqe_unknown_type++; 1714 return; 1715 } 1716 1717 pktlen = oob->ppi[0].pkt_len; 1718 1719 if (pktlen == 0) { 1720 /* data packets should never have packetlength of zero */ 1721 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1722 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1723 return; 1724 } 1725 1726 curr = rxq->buf_index; 1727 rxbuf_oob = &rxq->rx_oobs[curr]; 1728 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1729 1730 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 1731 1732 /* Unsuccessful refill will have old_buf == NULL. 1733 * In this case, mana_rx_skb() will drop the packet. 1734 */ 1735 mana_rx_skb(old_buf, old_fp, oob, rxq); 1736 1737drop: 1738 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1739 1740 mana_post_pkt_rxq(rxq); 1741} 1742 1743static void mana_poll_rx_cq(struct mana_cq *cq) 1744{ 1745 struct gdma_comp *comp = cq->gdma_comp_buf; 1746 struct mana_rxq *rxq = cq->rxq; 1747 int comp_read, i; 1748 1749 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1750 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1751 1752 rxq->xdp_flush = false; 1753 1754 for (i = 0; i < comp_read; i++) { 1755 if (WARN_ON_ONCE(comp[i].is_sq)) 1756 return; 1757 1758 /* verify recv cqe references the right rxq */ 1759 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1760 return; 1761 1762 mana_process_rx_cqe(rxq, cq, &comp[i]); 1763 } 1764 1765 if (comp_read > 0) { 1766 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1767 1768 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 1769 } 1770 1771 if (rxq->xdp_flush) 1772 xdp_do_flush(); 1773} 1774 1775static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1776{ 1777 struct mana_cq *cq = context; 1778 u8 arm_bit; 1779 int w; 1780 1781 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1782 1783 if (cq->type == MANA_CQ_TYPE_RX) 1784 mana_poll_rx_cq(cq); 1785 else 1786 mana_poll_tx_cq(cq); 1787 1788 w = cq->work_done; 1789 1790 if (w < cq->budget && 1791 napi_complete_done(&cq->napi, w)) { 1792 arm_bit = SET_ARM_BIT; 1793 } else { 1794 arm_bit = 0; 1795 } 1796 1797 mana_gd_ring_cq(gdma_queue, arm_bit); 1798 1799 return w; 1800} 1801 1802static int mana_poll(struct napi_struct *napi, int budget) 1803{ 1804 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1805 int w; 1806 1807 cq->work_done = 0; 1808 cq->budget = budget; 1809 1810 w = mana_cq_handler(cq, cq->gdma_cq); 1811 1812 return min(w, budget); 1813} 1814 1815static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1816{ 1817 struct mana_cq *cq = context; 1818 1819 napi_schedule_irqoff(&cq->napi); 1820} 1821 1822static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1823{ 1824 struct gdma_dev *gd = apc->ac->gdma_dev; 1825 1826 if (!cq->gdma_cq) 1827 return; 1828 1829 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1830} 1831 1832static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1833{ 1834 struct gdma_dev *gd = apc->ac->gdma_dev; 1835 1836 if (!txq->gdma_sq) 1837 return; 1838 1839 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1840} 1841 1842static void mana_destroy_txq(struct mana_port_context *apc) 1843{ 1844 struct napi_struct *napi; 1845 int i; 1846 1847 if (!apc->tx_qp) 1848 return; 1849 1850 for (i = 0; i < apc->num_queues; i++) { 1851 napi = &apc->tx_qp[i].tx_cq.napi; 1852 napi_synchronize(napi); 1853 napi_disable(napi); 1854 netif_napi_del(napi); 1855 1856 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1857 1858 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1859 1860 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1861 } 1862 1863 kfree(apc->tx_qp); 1864 apc->tx_qp = NULL; 1865} 1866 1867static int mana_create_txq(struct mana_port_context *apc, 1868 struct net_device *net) 1869{ 1870 struct mana_context *ac = apc->ac; 1871 struct gdma_dev *gd = ac->gdma_dev; 1872 struct mana_obj_spec wq_spec; 1873 struct mana_obj_spec cq_spec; 1874 struct gdma_queue_spec spec; 1875 struct gdma_context *gc; 1876 struct mana_txq *txq; 1877 struct mana_cq *cq; 1878 u32 txq_size; 1879 u32 cq_size; 1880 int err; 1881 int i; 1882 1883 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1884 GFP_KERNEL); 1885 if (!apc->tx_qp) 1886 return -ENOMEM; 1887 1888 /* The minimum size of the WQE is 32 bytes, hence 1889 * MAX_SEND_BUFFERS_PER_QUEUE represents the maximum number of WQEs 1890 * the SQ can store. This value is then used to size other queues 1891 * to prevent overflow. 1892 */ 1893 txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32; 1894 BUILD_BUG_ON(!PAGE_ALIGNED(txq_size)); 1895 1896 cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE; 1897 cq_size = PAGE_ALIGN(cq_size); 1898 1899 gc = gd->gdma_context; 1900 1901 for (i = 0; i < apc->num_queues; i++) { 1902 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1903 1904 /* Create SQ */ 1905 txq = &apc->tx_qp[i].txq; 1906 1907 u64_stats_init(&txq->stats.syncp); 1908 txq->ndev = net; 1909 txq->net_txq = netdev_get_tx_queue(net, i); 1910 txq->vp_offset = apc->tx_vp_offset; 1911 skb_queue_head_init(&txq->pending_skbs); 1912 1913 memset(&spec, 0, sizeof(spec)); 1914 spec.type = GDMA_SQ; 1915 spec.monitor_avl_buf = true; 1916 spec.queue_size = txq_size; 1917 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 1918 if (err) 1919 goto out; 1920 1921 /* Create SQ's CQ */ 1922 cq = &apc->tx_qp[i].tx_cq; 1923 cq->type = MANA_CQ_TYPE_TX; 1924 1925 cq->txq = txq; 1926 1927 memset(&spec, 0, sizeof(spec)); 1928 spec.type = GDMA_CQ; 1929 spec.monitor_avl_buf = false; 1930 spec.queue_size = cq_size; 1931 spec.cq.callback = mana_schedule_napi; 1932 spec.cq.parent_eq = ac->eqs[i].eq; 1933 spec.cq.context = cq; 1934 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 1935 if (err) 1936 goto out; 1937 1938 memset(&wq_spec, 0, sizeof(wq_spec)); 1939 memset(&cq_spec, 0, sizeof(cq_spec)); 1940 1941 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 1942 wq_spec.queue_size = txq->gdma_sq->queue_size; 1943 1944 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 1945 cq_spec.queue_size = cq->gdma_cq->queue_size; 1946 cq_spec.modr_ctx_id = 0; 1947 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 1948 1949 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 1950 &wq_spec, &cq_spec, 1951 &apc->tx_qp[i].tx_object); 1952 1953 if (err) 1954 goto out; 1955 1956 txq->gdma_sq->id = wq_spec.queue_index; 1957 cq->gdma_cq->id = cq_spec.queue_index; 1958 1959 txq->gdma_sq->mem_info.dma_region_handle = 1960 GDMA_INVALID_DMA_REGION; 1961 cq->gdma_cq->mem_info.dma_region_handle = 1962 GDMA_INVALID_DMA_REGION; 1963 1964 txq->gdma_txq_id = txq->gdma_sq->id; 1965 1966 cq->gdma_id = cq->gdma_cq->id; 1967 1968 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 1969 err = -EINVAL; 1970 goto out; 1971 } 1972 1973 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 1974 1975 netif_napi_add_tx(net, &cq->napi, mana_poll); 1976 napi_enable(&cq->napi); 1977 1978 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 1979 } 1980 1981 return 0; 1982out: 1983 mana_destroy_txq(apc); 1984 return err; 1985} 1986 1987static void mana_destroy_rxq(struct mana_port_context *apc, 1988 struct mana_rxq *rxq, bool validate_state) 1989 1990{ 1991 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1992 struct mana_recv_buf_oob *rx_oob; 1993 struct device *dev = gc->dev; 1994 struct napi_struct *napi; 1995 struct page *page; 1996 int i; 1997 1998 if (!rxq) 1999 return; 2000 2001 napi = &rxq->rx_cq.napi; 2002 2003 if (validate_state) 2004 napi_synchronize(napi); 2005 2006 napi_disable(napi); 2007 2008 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2009 2010 netif_napi_del(napi); 2011 2012 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2013 2014 mana_deinit_cq(apc, &rxq->rx_cq); 2015 2016 if (rxq->xdp_save_va) 2017 put_page(virt_to_head_page(rxq->xdp_save_va)); 2018 2019 for (i = 0; i < rxq->num_rx_buf; i++) { 2020 rx_oob = &rxq->rx_oobs[i]; 2021 2022 if (!rx_oob->buf_va) 2023 continue; 2024 2025 dma_unmap_single(dev, rx_oob->sgl[0].address, 2026 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2027 2028 page = virt_to_head_page(rx_oob->buf_va); 2029 2030 if (rx_oob->from_pool) 2031 page_pool_put_full_page(rxq->page_pool, page, false); 2032 else 2033 put_page(page); 2034 2035 rx_oob->buf_va = NULL; 2036 } 2037 2038 page_pool_destroy(rxq->page_pool); 2039 2040 if (rxq->gdma_rq) 2041 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2042 2043 kfree(rxq); 2044} 2045 2046static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2047 struct mana_rxq *rxq, struct device *dev) 2048{ 2049 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2050 bool from_pool = false; 2051 dma_addr_t da; 2052 void *va; 2053 2054 if (mpc->rxbufs_pre) 2055 va = mana_get_rxbuf_pre(rxq, &da); 2056 else 2057 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, false); 2058 2059 if (!va) 2060 return -ENOMEM; 2061 2062 rx_oob->buf_va = va; 2063 rx_oob->from_pool = from_pool; 2064 2065 rx_oob->sgl[0].address = da; 2066 rx_oob->sgl[0].size = rxq->datasize; 2067 rx_oob->sgl[0].mem_key = mem_key; 2068 2069 return 0; 2070} 2071 2072#define MANA_WQE_HEADER_SIZE 16 2073#define MANA_WQE_SGE_SIZE 16 2074 2075static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2076 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2077{ 2078 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2079 struct mana_recv_buf_oob *rx_oob; 2080 struct device *dev = gc->dev; 2081 u32 buf_idx; 2082 int ret; 2083 2084 WARN_ON(rxq->datasize == 0); 2085 2086 *rxq_size = 0; 2087 *cq_size = 0; 2088 2089 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2090 rx_oob = &rxq->rx_oobs[buf_idx]; 2091 memset(rx_oob, 0, sizeof(*rx_oob)); 2092 2093 rx_oob->num_sge = 1; 2094 2095 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2096 dev); 2097 if (ret) 2098 return ret; 2099 2100 rx_oob->wqe_req.sgl = rx_oob->sgl; 2101 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2102 rx_oob->wqe_req.inline_oob_size = 0; 2103 rx_oob->wqe_req.inline_oob_data = NULL; 2104 rx_oob->wqe_req.flags = 0; 2105 rx_oob->wqe_req.client_data_unit = 0; 2106 2107 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2108 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2109 *cq_size += COMP_ENTRY_SIZE; 2110 } 2111 2112 return 0; 2113} 2114 2115static int mana_push_wqe(struct mana_rxq *rxq) 2116{ 2117 struct mana_recv_buf_oob *rx_oob; 2118 u32 buf_idx; 2119 int err; 2120 2121 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2122 rx_oob = &rxq->rx_oobs[buf_idx]; 2123 2124 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2125 &rx_oob->wqe_inf); 2126 if (err) 2127 return -ENOSPC; 2128 } 2129 2130 return 0; 2131} 2132 2133static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2134{ 2135 struct page_pool_params pprm = {}; 2136 int ret; 2137 2138 pprm.pool_size = RX_BUFFERS_PER_QUEUE; 2139 pprm.nid = gc->numa_node; 2140 pprm.napi = &rxq->rx_cq.napi; 2141 pprm.netdev = rxq->ndev; 2142 2143 rxq->page_pool = page_pool_create(&pprm); 2144 2145 if (IS_ERR(rxq->page_pool)) { 2146 ret = PTR_ERR(rxq->page_pool); 2147 rxq->page_pool = NULL; 2148 return ret; 2149 } 2150 2151 return 0; 2152} 2153 2154static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2155 u32 rxq_idx, struct mana_eq *eq, 2156 struct net_device *ndev) 2157{ 2158 struct gdma_dev *gd = apc->ac->gdma_dev; 2159 struct mana_obj_spec wq_spec; 2160 struct mana_obj_spec cq_spec; 2161 struct gdma_queue_spec spec; 2162 struct mana_cq *cq = NULL; 2163 struct gdma_context *gc; 2164 u32 cq_size, rq_size; 2165 struct mana_rxq *rxq; 2166 int err; 2167 2168 gc = gd->gdma_context; 2169 2170 rxq = kzalloc(struct_size(rxq, rx_oobs, RX_BUFFERS_PER_QUEUE), 2171 GFP_KERNEL); 2172 if (!rxq) 2173 return NULL; 2174 2175 rxq->ndev = ndev; 2176 rxq->num_rx_buf = RX_BUFFERS_PER_QUEUE; 2177 rxq->rxq_idx = rxq_idx; 2178 rxq->rxobj = INVALID_MANA_HANDLE; 2179 2180 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2181 &rxq->headroom); 2182 2183 /* Create page pool for RX queue */ 2184 err = mana_create_page_pool(rxq, gc); 2185 if (err) { 2186 netdev_err(ndev, "Create page pool err:%d\n", err); 2187 goto out; 2188 } 2189 2190 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2191 if (err) 2192 goto out; 2193 2194 rq_size = PAGE_ALIGN(rq_size); 2195 cq_size = PAGE_ALIGN(cq_size); 2196 2197 /* Create RQ */ 2198 memset(&spec, 0, sizeof(spec)); 2199 spec.type = GDMA_RQ; 2200 spec.monitor_avl_buf = true; 2201 spec.queue_size = rq_size; 2202 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2203 if (err) 2204 goto out; 2205 2206 /* Create RQ's CQ */ 2207 cq = &rxq->rx_cq; 2208 cq->type = MANA_CQ_TYPE_RX; 2209 cq->rxq = rxq; 2210 2211 memset(&spec, 0, sizeof(spec)); 2212 spec.type = GDMA_CQ; 2213 spec.monitor_avl_buf = false; 2214 spec.queue_size = cq_size; 2215 spec.cq.callback = mana_schedule_napi; 2216 spec.cq.parent_eq = eq->eq; 2217 spec.cq.context = cq; 2218 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2219 if (err) 2220 goto out; 2221 2222 memset(&wq_spec, 0, sizeof(wq_spec)); 2223 memset(&cq_spec, 0, sizeof(cq_spec)); 2224 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2225 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2226 2227 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2228 cq_spec.queue_size = cq->gdma_cq->queue_size; 2229 cq_spec.modr_ctx_id = 0; 2230 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2231 2232 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2233 &wq_spec, &cq_spec, &rxq->rxobj); 2234 if (err) 2235 goto out; 2236 2237 rxq->gdma_rq->id = wq_spec.queue_index; 2238 cq->gdma_cq->id = cq_spec.queue_index; 2239 2240 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2241 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2242 2243 rxq->gdma_id = rxq->gdma_rq->id; 2244 cq->gdma_id = cq->gdma_cq->id; 2245 2246 err = mana_push_wqe(rxq); 2247 if (err) 2248 goto out; 2249 2250 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2251 err = -EINVAL; 2252 goto out; 2253 } 2254 2255 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2256 2257 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2258 2259 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2260 cq->napi.napi_id)); 2261 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2262 rxq->page_pool)); 2263 2264 napi_enable(&cq->napi); 2265 2266 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2267out: 2268 if (!err) 2269 return rxq; 2270 2271 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2272 2273 mana_destroy_rxq(apc, rxq, false); 2274 2275 if (cq) 2276 mana_deinit_cq(apc, cq); 2277 2278 return NULL; 2279} 2280 2281static int mana_add_rx_queues(struct mana_port_context *apc, 2282 struct net_device *ndev) 2283{ 2284 struct mana_context *ac = apc->ac; 2285 struct mana_rxq *rxq; 2286 int err = 0; 2287 int i; 2288 2289 for (i = 0; i < apc->num_queues; i++) { 2290 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2291 if (!rxq) { 2292 err = -ENOMEM; 2293 goto out; 2294 } 2295 2296 u64_stats_init(&rxq->stats.syncp); 2297 2298 apc->rxqs[i] = rxq; 2299 } 2300 2301 apc->default_rxobj = apc->rxqs[0]->rxobj; 2302out: 2303 return err; 2304} 2305 2306static void mana_destroy_vport(struct mana_port_context *apc) 2307{ 2308 struct gdma_dev *gd = apc->ac->gdma_dev; 2309 struct mana_rxq *rxq; 2310 u32 rxq_idx; 2311 2312 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2313 rxq = apc->rxqs[rxq_idx]; 2314 if (!rxq) 2315 continue; 2316 2317 mana_destroy_rxq(apc, rxq, true); 2318 apc->rxqs[rxq_idx] = NULL; 2319 } 2320 2321 mana_destroy_txq(apc); 2322 mana_uncfg_vport(apc); 2323 2324 if (gd->gdma_context->is_pf) 2325 mana_pf_deregister_hw_vport(apc); 2326} 2327 2328static int mana_create_vport(struct mana_port_context *apc, 2329 struct net_device *net) 2330{ 2331 struct gdma_dev *gd = apc->ac->gdma_dev; 2332 int err; 2333 2334 apc->default_rxobj = INVALID_MANA_HANDLE; 2335 2336 if (gd->gdma_context->is_pf) { 2337 err = mana_pf_register_hw_vport(apc); 2338 if (err) 2339 return err; 2340 } 2341 2342 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2343 if (err) 2344 return err; 2345 2346 return mana_create_txq(apc, net); 2347} 2348 2349static void mana_rss_table_init(struct mana_port_context *apc) 2350{ 2351 int i; 2352 2353 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 2354 apc->indir_table[i] = 2355 ethtool_rxfh_indir_default(i, apc->num_queues); 2356} 2357 2358int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2359 bool update_hash, bool update_tab) 2360{ 2361 u32 queue_idx; 2362 int err; 2363 int i; 2364 2365 if (update_tab) { 2366 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) { 2367 queue_idx = apc->indir_table[i]; 2368 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2369 } 2370 } 2371 2372 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2373 if (err) 2374 return err; 2375 2376 mana_fence_rqs(apc); 2377 2378 return 0; 2379} 2380 2381void mana_query_gf_stats(struct mana_port_context *apc) 2382{ 2383 struct mana_query_gf_stat_resp resp = {}; 2384 struct mana_query_gf_stat_req req = {}; 2385 struct net_device *ndev = apc->ndev; 2386 int err; 2387 2388 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2389 sizeof(req), sizeof(resp)); 2390 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE | 2391 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED | 2392 STATISTICS_FLAGS_HC_RX_BYTES | 2393 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS | 2394 STATISTICS_FLAGS_HC_RX_UCAST_BYTES | 2395 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS | 2396 STATISTICS_FLAGS_HC_RX_MCAST_BYTES | 2397 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS | 2398 STATISTICS_FLAGS_HC_RX_BCAST_BYTES | 2399 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED | 2400 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED | 2401 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS | 2402 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT | 2403 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT | 2404 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT | 2405 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT | 2406 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT | 2407 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION | 2408 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB | 2409 STATISTICS_FLAGS_HC_TX_BYTES | 2410 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2411 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2412 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2413 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2414 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2415 STATISTICS_FLAGS_HC_TX_BCAST_BYTES | 2416 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR; 2417 2418 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 2419 sizeof(resp)); 2420 if (err) { 2421 netdev_err(ndev, "Failed to query GF stats: %d\n", err); 2422 return; 2423 } 2424 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2425 sizeof(resp)); 2426 if (err || resp.hdr.status) { 2427 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err, 2428 resp.hdr.status); 2429 return; 2430 } 2431 2432 apc->eth_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe; 2433 apc->eth_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled; 2434 apc->eth_stats.hc_rx_bytes = resp.hc_rx_bytes; 2435 apc->eth_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts; 2436 apc->eth_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes; 2437 apc->eth_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts; 2438 apc->eth_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes; 2439 apc->eth_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts; 2440 apc->eth_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes; 2441 apc->eth_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled; 2442 apc->eth_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled; 2443 apc->eth_stats.hc_tx_err_inval_vportoffset_pkt = 2444 resp.tx_err_inval_vport_offset_pkt; 2445 apc->eth_stats.hc_tx_err_vlan_enforcement = 2446 resp.tx_err_vlan_enforcement; 2447 apc->eth_stats.hc_tx_err_eth_type_enforcement = 2448 resp.tx_err_ethtype_enforcement; 2449 apc->eth_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement; 2450 apc->eth_stats.hc_tx_err_sqpdid_enforcement = 2451 resp.tx_err_SQPDID_enforcement; 2452 apc->eth_stats.hc_tx_err_cqpdid_enforcement = 2453 resp.tx_err_CQPDID_enforcement; 2454 apc->eth_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation; 2455 apc->eth_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob; 2456 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes; 2457 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2458 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2459 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2460 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2461 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2462 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2463 apc->eth_stats.hc_tx_err_gdma = resp.tx_err_gdma; 2464} 2465 2466static int mana_init_port(struct net_device *ndev) 2467{ 2468 struct mana_port_context *apc = netdev_priv(ndev); 2469 u32 max_txq, max_rxq, max_queues; 2470 int port_idx = apc->port_idx; 2471 u32 num_indirect_entries; 2472 int err; 2473 2474 err = mana_init_port_context(apc); 2475 if (err) 2476 return err; 2477 2478 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2479 &num_indirect_entries); 2480 if (err) { 2481 netdev_err(ndev, "Failed to query info for vPort %d\n", 2482 port_idx); 2483 goto reset_apc; 2484 } 2485 2486 max_queues = min_t(u32, max_txq, max_rxq); 2487 if (apc->max_queues > max_queues) 2488 apc->max_queues = max_queues; 2489 2490 if (apc->num_queues > apc->max_queues) 2491 apc->num_queues = apc->max_queues; 2492 2493 eth_hw_addr_set(ndev, apc->mac_addr); 2494 2495 return 0; 2496 2497reset_apc: 2498 kfree(apc->rxqs); 2499 apc->rxqs = NULL; 2500 return err; 2501} 2502 2503int mana_alloc_queues(struct net_device *ndev) 2504{ 2505 struct mana_port_context *apc = netdev_priv(ndev); 2506 struct gdma_dev *gd = apc->ac->gdma_dev; 2507 int err; 2508 2509 err = mana_create_vport(apc, ndev); 2510 if (err) 2511 return err; 2512 2513 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2514 if (err) 2515 goto destroy_vport; 2516 2517 err = mana_add_rx_queues(apc, ndev); 2518 if (err) 2519 goto destroy_vport; 2520 2521 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2522 2523 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2524 if (err) 2525 goto destroy_vport; 2526 2527 mana_rss_table_init(apc); 2528 2529 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2530 if (err) 2531 goto destroy_vport; 2532 2533 if (gd->gdma_context->is_pf) { 2534 err = mana_pf_register_filter(apc); 2535 if (err) 2536 goto destroy_vport; 2537 } 2538 2539 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2540 2541 return 0; 2542 2543destroy_vport: 2544 mana_destroy_vport(apc); 2545 return err; 2546} 2547 2548int mana_attach(struct net_device *ndev) 2549{ 2550 struct mana_port_context *apc = netdev_priv(ndev); 2551 int err; 2552 2553 ASSERT_RTNL(); 2554 2555 err = mana_init_port(ndev); 2556 if (err) 2557 return err; 2558 2559 if (apc->port_st_save) { 2560 err = mana_alloc_queues(ndev); 2561 if (err) { 2562 mana_cleanup_port_context(apc); 2563 return err; 2564 } 2565 } 2566 2567 apc->port_is_up = apc->port_st_save; 2568 2569 /* Ensure port state updated before txq state */ 2570 smp_wmb(); 2571 2572 if (apc->port_is_up) 2573 netif_carrier_on(ndev); 2574 2575 netif_device_attach(ndev); 2576 2577 return 0; 2578} 2579 2580static int mana_dealloc_queues(struct net_device *ndev) 2581{ 2582 struct mana_port_context *apc = netdev_priv(ndev); 2583 unsigned long timeout = jiffies + 120 * HZ; 2584 struct gdma_dev *gd = apc->ac->gdma_dev; 2585 struct mana_txq *txq; 2586 struct sk_buff *skb; 2587 int i, err; 2588 u32 tsleep; 2589 2590 if (apc->port_is_up) 2591 return -EINVAL; 2592 2593 mana_chn_setxdp(apc, NULL); 2594 2595 if (gd->gdma_context->is_pf) 2596 mana_pf_deregister_filter(apc); 2597 2598 /* No packet can be transmitted now since apc->port_is_up is false. 2599 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2600 * a txq because it may not timely see apc->port_is_up being cleared 2601 * to false, but it doesn't matter since mana_start_xmit() drops any 2602 * new packets due to apc->port_is_up being false. 2603 * 2604 * Drain all the in-flight TX packets. 2605 * A timeout of 120 seconds for all the queues is used. 2606 * This will break the while loop when h/w is not responding. 2607 * This value of 120 has been decided here considering max 2608 * number of queues. 2609 */ 2610 2611 for (i = 0; i < apc->num_queues; i++) { 2612 txq = &apc->tx_qp[i].txq; 2613 tsleep = 1000; 2614 while (atomic_read(&txq->pending_sends) > 0 && 2615 time_before(jiffies, timeout)) { 2616 usleep_range(tsleep, tsleep + 1000); 2617 tsleep <<= 1; 2618 } 2619 if (atomic_read(&txq->pending_sends)) { 2620 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 2621 if (err) { 2622 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 2623 err, atomic_read(&txq->pending_sends), 2624 txq->gdma_txq_id); 2625 } 2626 break; 2627 } 2628 } 2629 2630 for (i = 0; i < apc->num_queues; i++) { 2631 txq = &apc->tx_qp[i].txq; 2632 while ((skb = skb_dequeue(&txq->pending_skbs))) { 2633 mana_unmap_skb(skb, apc); 2634 dev_kfree_skb_any(skb); 2635 } 2636 atomic_set(&txq->pending_sends, 0); 2637 } 2638 /* We're 100% sure the queues can no longer be woken up, because 2639 * we're sure now mana_poll_tx_cq() can't be running. 2640 */ 2641 2642 apc->rss_state = TRI_STATE_FALSE; 2643 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2644 if (err) { 2645 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2646 return err; 2647 } 2648 2649 mana_destroy_vport(apc); 2650 2651 return 0; 2652} 2653 2654int mana_detach(struct net_device *ndev, bool from_close) 2655{ 2656 struct mana_port_context *apc = netdev_priv(ndev); 2657 int err; 2658 2659 ASSERT_RTNL(); 2660 2661 apc->port_st_save = apc->port_is_up; 2662 apc->port_is_up = false; 2663 2664 /* Ensure port state updated before txq state */ 2665 smp_wmb(); 2666 2667 netif_tx_disable(ndev); 2668 netif_carrier_off(ndev); 2669 2670 if (apc->port_st_save) { 2671 err = mana_dealloc_queues(ndev); 2672 if (err) 2673 return err; 2674 } 2675 2676 if (!from_close) { 2677 netif_device_detach(ndev); 2678 mana_cleanup_port_context(apc); 2679 } 2680 2681 return 0; 2682} 2683 2684static int mana_probe_port(struct mana_context *ac, int port_idx, 2685 struct net_device **ndev_storage) 2686{ 2687 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2688 struct mana_port_context *apc; 2689 struct net_device *ndev; 2690 int err; 2691 2692 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2693 gc->max_num_queues); 2694 if (!ndev) 2695 return -ENOMEM; 2696 2697 *ndev_storage = ndev; 2698 2699 apc = netdev_priv(ndev); 2700 apc->ac = ac; 2701 apc->ndev = ndev; 2702 apc->max_queues = gc->max_num_queues; 2703 apc->num_queues = gc->max_num_queues; 2704 apc->port_handle = INVALID_MANA_HANDLE; 2705 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2706 apc->port_idx = port_idx; 2707 2708 mutex_init(&apc->vport_mutex); 2709 apc->vport_use_count = 0; 2710 2711 ndev->netdev_ops = &mana_devops; 2712 ndev->ethtool_ops = &mana_ethtool_ops; 2713 ndev->mtu = ETH_DATA_LEN; 2714 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2715 ndev->min_mtu = ETH_MIN_MTU; 2716 ndev->needed_headroom = MANA_HEADROOM; 2717 ndev->dev_port = port_idx; 2718 SET_NETDEV_DEV(ndev, gc->dev); 2719 2720 netif_carrier_off(ndev); 2721 2722 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2723 2724 err = mana_init_port(ndev); 2725 if (err) 2726 goto free_net; 2727 2728 netdev_lockdep_set_classes(ndev); 2729 2730 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2731 ndev->hw_features |= NETIF_F_RXCSUM; 2732 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2733 ndev->hw_features |= NETIF_F_RXHASH; 2734 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2735 NETIF_F_HW_VLAN_CTAG_RX; 2736 ndev->vlan_features = ndev->features; 2737 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 2738 NETDEV_XDP_ACT_REDIRECT | 2739 NETDEV_XDP_ACT_NDO_XMIT); 2740 2741 err = register_netdev(ndev); 2742 if (err) { 2743 netdev_err(ndev, "Unable to register netdev.\n"); 2744 goto reset_apc; 2745 } 2746 2747 return 0; 2748 2749reset_apc: 2750 kfree(apc->rxqs); 2751 apc->rxqs = NULL; 2752free_net: 2753 *ndev_storage = NULL; 2754 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2755 free_netdev(ndev); 2756 return err; 2757} 2758 2759static void adev_release(struct device *dev) 2760{ 2761 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2762 2763 kfree(madev); 2764} 2765 2766static void remove_adev(struct gdma_dev *gd) 2767{ 2768 struct auxiliary_device *adev = gd->adev; 2769 int id = adev->id; 2770 2771 auxiliary_device_delete(adev); 2772 auxiliary_device_uninit(adev); 2773 2774 mana_adev_idx_free(id); 2775 gd->adev = NULL; 2776} 2777 2778static int add_adev(struct gdma_dev *gd) 2779{ 2780 struct auxiliary_device *adev; 2781 struct mana_adev *madev; 2782 int ret; 2783 2784 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2785 if (!madev) 2786 return -ENOMEM; 2787 2788 adev = &madev->adev; 2789 ret = mana_adev_idx_alloc(); 2790 if (ret < 0) 2791 goto idx_fail; 2792 adev->id = ret; 2793 2794 adev->name = "rdma"; 2795 adev->dev.parent = gd->gdma_context->dev; 2796 adev->dev.release = adev_release; 2797 madev->mdev = gd; 2798 2799 ret = auxiliary_device_init(adev); 2800 if (ret) 2801 goto init_fail; 2802 2803 ret = auxiliary_device_add(adev); 2804 if (ret) 2805 goto add_fail; 2806 2807 gd->adev = adev; 2808 return 0; 2809 2810add_fail: 2811 auxiliary_device_uninit(adev); 2812 2813init_fail: 2814 mana_adev_idx_free(adev->id); 2815 2816idx_fail: 2817 kfree(madev); 2818 2819 return ret; 2820} 2821 2822int mana_probe(struct gdma_dev *gd, bool resuming) 2823{ 2824 struct gdma_context *gc = gd->gdma_context; 2825 struct mana_context *ac = gd->driver_data; 2826 struct device *dev = gc->dev; 2827 u16 num_ports = 0; 2828 int err; 2829 int i; 2830 2831 dev_info(dev, 2832 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2833 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2834 2835 err = mana_gd_register_device(gd); 2836 if (err) 2837 return err; 2838 2839 if (!resuming) { 2840 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 2841 if (!ac) 2842 return -ENOMEM; 2843 2844 ac->gdma_dev = gd; 2845 gd->driver_data = ac; 2846 } 2847 2848 err = mana_create_eq(ac); 2849 if (err) 2850 goto out; 2851 2852 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 2853 MANA_MICRO_VERSION, &num_ports); 2854 if (err) 2855 goto out; 2856 2857 if (!resuming) { 2858 ac->num_ports = num_ports; 2859 } else { 2860 if (ac->num_ports != num_ports) { 2861 dev_err(dev, "The number of vPorts changed: %d->%d\n", 2862 ac->num_ports, num_ports); 2863 err = -EPROTO; 2864 goto out; 2865 } 2866 } 2867 2868 if (ac->num_ports == 0) 2869 dev_err(dev, "Failed to detect any vPort\n"); 2870 2871 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 2872 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 2873 2874 if (!resuming) { 2875 for (i = 0; i < ac->num_ports; i++) { 2876 err = mana_probe_port(ac, i, &ac->ports[i]); 2877 if (err) 2878 break; 2879 } 2880 } else { 2881 for (i = 0; i < ac->num_ports; i++) { 2882 rtnl_lock(); 2883 err = mana_attach(ac->ports[i]); 2884 rtnl_unlock(); 2885 if (err) 2886 break; 2887 } 2888 } 2889 2890 err = add_adev(gd); 2891out: 2892 if (err) 2893 mana_remove(gd, false); 2894 2895 return err; 2896} 2897 2898void mana_remove(struct gdma_dev *gd, bool suspending) 2899{ 2900 struct gdma_context *gc = gd->gdma_context; 2901 struct mana_context *ac = gd->driver_data; 2902 struct device *dev = gc->dev; 2903 struct net_device *ndev; 2904 int err; 2905 int i; 2906 2907 /* adev currently doesn't support suspending, always remove it */ 2908 if (gd->adev) 2909 remove_adev(gd); 2910 2911 for (i = 0; i < ac->num_ports; i++) { 2912 ndev = ac->ports[i]; 2913 if (!ndev) { 2914 if (i == 0) 2915 dev_err(dev, "No net device to remove\n"); 2916 goto out; 2917 } 2918 2919 /* All cleanup actions should stay after rtnl_lock(), otherwise 2920 * other functions may access partially cleaned up data. 2921 */ 2922 rtnl_lock(); 2923 2924 err = mana_detach(ndev, false); 2925 if (err) 2926 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 2927 i, err); 2928 2929 if (suspending) { 2930 /* No need to unregister the ndev. */ 2931 rtnl_unlock(); 2932 continue; 2933 } 2934 2935 unregister_netdevice(ndev); 2936 2937 rtnl_unlock(); 2938 2939 free_netdev(ndev); 2940 } 2941 2942 mana_destroy_eq(ac); 2943out: 2944 mana_gd_deregister_device(gd); 2945 2946 if (suspending) 2947 return; 2948 2949 gd->driver_data = NULL; 2950 gd->gdma_context = NULL; 2951 kfree(ac); 2952} 2953