1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* Copyright (c) 2021, Microsoft Corporation. */ 3 4 #include <uapi/linux/bpf.h> 5 6 #include <linux/debugfs.h> 7 #include <linux/inetdevice.h> 8 #include <linux/etherdevice.h> 9 #include <linux/ethtool.h> 10 #include <linux/filter.h> 11 #include <linux/mm.h> 12 #include <linux/pci.h> 13 14 #include <net/checksum.h> 15 #include <net/ip6_checksum.h> 16 #include <net/page_pool/helpers.h> 17 #include <net/xdp.h> 18 19 #include <net/mana/mana.h> 20 #include <net/mana/mana_auxiliary.h> 21 22 static DEFINE_IDA(mana_adev_ida); 23 24 static int mana_adev_idx_alloc(void) 25 { 26 return ida_alloc(&mana_adev_ida, GFP_KERNEL); 27 } 28 29 static void mana_adev_idx_free(int idx) 30 { 31 ida_free(&mana_adev_ida, idx); 32 } 33 34 static ssize_t mana_dbg_q_read(struct file *filp, char __user *buf, size_t count, 35 loff_t *pos) 36 { 37 struct gdma_queue *gdma_q = filp->private_data; 38 39 return simple_read_from_buffer(buf, count, pos, gdma_q->queue_mem_ptr, 40 gdma_q->queue_size); 41 } 42 43 static const struct file_operations mana_dbg_q_fops = { 44 .owner = THIS_MODULE, 45 .open = simple_open, 46 .read = mana_dbg_q_read, 47 }; 48 49 /* Microsoft Azure Network Adapter (MANA) functions */ 50 51 static int mana_open(struct net_device *ndev) 52 { 53 struct mana_port_context *apc = netdev_priv(ndev); 54 int err; 55 56 err = mana_alloc_queues(ndev); 57 if (err) 58 return err; 59 60 apc->port_is_up = true; 61 62 /* Ensure port state updated before txq state */ 63 smp_wmb(); 64 65 netif_carrier_on(ndev); 66 netif_tx_wake_all_queues(ndev); 67 68 return 0; 69 } 70 71 static int mana_close(struct net_device *ndev) 72 { 73 struct mana_port_context *apc = netdev_priv(ndev); 74 75 if (!apc->port_is_up) 76 return 0; 77 78 return mana_detach(ndev, true); 79 } 80 81 static bool mana_can_tx(struct gdma_queue *wq) 82 { 83 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE; 84 } 85 86 static unsigned int mana_checksum_info(struct sk_buff *skb) 87 { 88 if (skb->protocol == htons(ETH_P_IP)) { 89 struct iphdr *ip = ip_hdr(skb); 90 91 if (ip->protocol == IPPROTO_TCP) 92 return IPPROTO_TCP; 93 94 if (ip->protocol == IPPROTO_UDP) 95 return IPPROTO_UDP; 96 } else if (skb->protocol == htons(ETH_P_IPV6)) { 97 struct ipv6hdr *ip6 = ipv6_hdr(skb); 98 99 if (ip6->nexthdr == IPPROTO_TCP) 100 return IPPROTO_TCP; 101 102 if (ip6->nexthdr == IPPROTO_UDP) 103 return IPPROTO_UDP; 104 } 105 106 /* No csum offloading */ 107 return 0; 108 } 109 110 static void mana_add_sge(struct mana_tx_package *tp, struct mana_skb_head *ash, 111 int sg_i, dma_addr_t da, int sge_len, u32 gpa_mkey) 112 { 113 ash->dma_handle[sg_i] = da; 114 ash->size[sg_i] = sge_len; 115 116 tp->wqe_req.sgl[sg_i].address = da; 117 tp->wqe_req.sgl[sg_i].mem_key = gpa_mkey; 118 tp->wqe_req.sgl[sg_i].size = sge_len; 119 } 120 121 static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc, 122 struct mana_tx_package *tp, int gso_hs) 123 { 124 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 125 int hsg = 1; /* num of SGEs of linear part */ 126 struct gdma_dev *gd = apc->ac->gdma_dev; 127 int skb_hlen = skb_headlen(skb); 128 int sge0_len, sge1_len = 0; 129 struct gdma_context *gc; 130 struct device *dev; 131 skb_frag_t *frag; 132 dma_addr_t da; 133 int sg_i; 134 int i; 135 136 gc = gd->gdma_context; 137 dev = gc->dev; 138 139 if (gso_hs && gso_hs < skb_hlen) { 140 sge0_len = gso_hs; 141 sge1_len = skb_hlen - gso_hs; 142 } else { 143 sge0_len = skb_hlen; 144 } 145 146 da = dma_map_single(dev, skb->data, sge0_len, DMA_TO_DEVICE); 147 if (dma_mapping_error(dev, da)) 148 return -ENOMEM; 149 150 mana_add_sge(tp, ash, 0, da, sge0_len, gd->gpa_mkey); 151 152 if (sge1_len) { 153 sg_i = 1; 154 da = dma_map_single(dev, skb->data + sge0_len, sge1_len, 155 DMA_TO_DEVICE); 156 if (dma_mapping_error(dev, da)) 157 goto frag_err; 158 159 mana_add_sge(tp, ash, sg_i, da, sge1_len, gd->gpa_mkey); 160 hsg = 2; 161 } 162 163 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 164 sg_i = hsg + i; 165 166 frag = &skb_shinfo(skb)->frags[i]; 167 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 168 DMA_TO_DEVICE); 169 if (dma_mapping_error(dev, da)) 170 goto frag_err; 171 172 mana_add_sge(tp, ash, sg_i, da, skb_frag_size(frag), 173 gd->gpa_mkey); 174 } 175 176 return 0; 177 178 frag_err: 179 for (i = sg_i - 1; i >= hsg; i--) 180 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 181 DMA_TO_DEVICE); 182 183 for (i = hsg - 1; i >= 0; i--) 184 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 185 DMA_TO_DEVICE); 186 187 return -ENOMEM; 188 } 189 190 /* Handle the case when GSO SKB linear length is too large. 191 * MANA NIC requires GSO packets to put only the packet header to SGE0. 192 * So, we need 2 SGEs for the skb linear part which contains more than the 193 * header. 194 * Return a positive value for the number of SGEs, or a negative value 195 * for an error. 196 */ 197 static int mana_fix_skb_head(struct net_device *ndev, struct sk_buff *skb, 198 int gso_hs) 199 { 200 int num_sge = 1 + skb_shinfo(skb)->nr_frags; 201 int skb_hlen = skb_headlen(skb); 202 203 if (gso_hs < skb_hlen) { 204 num_sge++; 205 } else if (gso_hs > skb_hlen) { 206 if (net_ratelimit()) 207 netdev_err(ndev, 208 "TX nonlinear head: hs:%d, skb_hlen:%d\n", 209 gso_hs, skb_hlen); 210 211 return -EINVAL; 212 } 213 214 return num_sge; 215 } 216 217 /* Get the GSO packet's header size */ 218 static int mana_get_gso_hs(struct sk_buff *skb) 219 { 220 int gso_hs; 221 222 if (skb->encapsulation) { 223 gso_hs = skb_inner_tcp_all_headers(skb); 224 } else { 225 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 226 gso_hs = skb_transport_offset(skb) + 227 sizeof(struct udphdr); 228 } else { 229 gso_hs = skb_tcp_all_headers(skb); 230 } 231 } 232 233 return gso_hs; 234 } 235 236 netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) 237 { 238 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT; 239 struct mana_port_context *apc = netdev_priv(ndev); 240 int gso_hs = 0; /* zero for non-GSO pkts */ 241 u16 txq_idx = skb_get_queue_mapping(skb); 242 struct gdma_dev *gd = apc->ac->gdma_dev; 243 bool ipv4 = false, ipv6 = false; 244 struct mana_tx_package pkg = {}; 245 struct netdev_queue *net_txq; 246 struct mana_stats_tx *tx_stats; 247 struct gdma_queue *gdma_sq; 248 unsigned int csum_type; 249 struct mana_txq *txq; 250 struct mana_cq *cq; 251 int err, len; 252 253 if (unlikely(!apc->port_is_up)) 254 goto tx_drop; 255 256 if (skb_cow_head(skb, MANA_HEADROOM)) 257 goto tx_drop_count; 258 259 txq = &apc->tx_qp[txq_idx].txq; 260 gdma_sq = txq->gdma_sq; 261 cq = &apc->tx_qp[txq_idx].tx_cq; 262 tx_stats = &txq->stats; 263 264 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id; 265 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame; 266 267 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) { 268 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset; 269 pkt_fmt = MANA_LONG_PKT_FMT; 270 } else { 271 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; 272 } 273 274 if (skb_vlan_tag_present(skb)) { 275 pkt_fmt = MANA_LONG_PKT_FMT; 276 pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1; 277 pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb); 278 pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb); 279 pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb); 280 } 281 282 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt; 283 284 if (pkt_fmt == MANA_SHORT_PKT_FMT) { 285 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob); 286 u64_stats_update_begin(&tx_stats->syncp); 287 tx_stats->short_pkt_fmt++; 288 u64_stats_update_end(&tx_stats->syncp); 289 } else { 290 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob); 291 u64_stats_update_begin(&tx_stats->syncp); 292 tx_stats->long_pkt_fmt++; 293 u64_stats_update_end(&tx_stats->syncp); 294 } 295 296 pkg.wqe_req.inline_oob_data = &pkg.tx_oob; 297 pkg.wqe_req.flags = 0; 298 pkg.wqe_req.client_data_unit = 0; 299 300 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; 301 302 if (skb->protocol == htons(ETH_P_IP)) 303 ipv4 = true; 304 else if (skb->protocol == htons(ETH_P_IPV6)) 305 ipv6 = true; 306 307 if (skb_is_gso(skb)) { 308 int num_sge; 309 310 gso_hs = mana_get_gso_hs(skb); 311 312 num_sge = mana_fix_skb_head(ndev, skb, gso_hs); 313 if (num_sge > 0) 314 pkg.wqe_req.num_sge = num_sge; 315 else 316 goto tx_drop_count; 317 318 u64_stats_update_begin(&tx_stats->syncp); 319 if (skb->encapsulation) { 320 tx_stats->tso_inner_packets++; 321 tx_stats->tso_inner_bytes += skb->len - gso_hs; 322 } else { 323 tx_stats->tso_packets++; 324 tx_stats->tso_bytes += skb->len - gso_hs; 325 } 326 u64_stats_update_end(&tx_stats->syncp); 327 328 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 329 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 330 331 pkg.tx_oob.s_oob.comp_iphdr_csum = 1; 332 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 333 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 334 335 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size; 336 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0; 337 if (ipv4) { 338 ip_hdr(skb)->tot_len = 0; 339 ip_hdr(skb)->check = 0; 340 tcp_hdr(skb)->check = 341 ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 342 ip_hdr(skb)->daddr, 0, 343 IPPROTO_TCP, 0); 344 } else { 345 ipv6_hdr(skb)->payload_len = 0; 346 tcp_hdr(skb)->check = 347 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 348 &ipv6_hdr(skb)->daddr, 0, 349 IPPROTO_TCP, 0); 350 } 351 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 352 csum_type = mana_checksum_info(skb); 353 354 u64_stats_update_begin(&tx_stats->syncp); 355 tx_stats->csum_partial++; 356 u64_stats_update_end(&tx_stats->syncp); 357 358 if (csum_type == IPPROTO_TCP) { 359 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 360 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 361 362 pkg.tx_oob.s_oob.comp_tcp_csum = 1; 363 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb); 364 365 } else if (csum_type == IPPROTO_UDP) { 366 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4; 367 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6; 368 369 pkg.tx_oob.s_oob.comp_udp_csum = 1; 370 } else { 371 /* Can't do offload of this type of checksum */ 372 if (skb_checksum_help(skb)) 373 goto tx_drop_count; 374 } 375 } 376 377 WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES); 378 379 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { 380 pkg.wqe_req.sgl = pkg.sgl_array; 381 } else { 382 pkg.sgl_ptr = kmalloc_array(pkg.wqe_req.num_sge, 383 sizeof(struct gdma_sge), 384 GFP_ATOMIC); 385 if (!pkg.sgl_ptr) 386 goto tx_drop_count; 387 388 pkg.wqe_req.sgl = pkg.sgl_ptr; 389 } 390 391 if (mana_map_skb(skb, apc, &pkg, gso_hs)) { 392 u64_stats_update_begin(&tx_stats->syncp); 393 tx_stats->mana_map_err++; 394 u64_stats_update_end(&tx_stats->syncp); 395 goto free_sgl_ptr; 396 } 397 398 skb_queue_tail(&txq->pending_skbs, skb); 399 400 len = skb->len; 401 net_txq = netdev_get_tx_queue(ndev, txq_idx); 402 403 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req, 404 (struct gdma_posted_wqe_info *)skb->cb); 405 if (!mana_can_tx(gdma_sq)) { 406 netif_tx_stop_queue(net_txq); 407 apc->eth_stats.stop_queue++; 408 } 409 410 if (err) { 411 (void)skb_dequeue_tail(&txq->pending_skbs); 412 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err); 413 err = NETDEV_TX_BUSY; 414 goto tx_busy; 415 } 416 417 err = NETDEV_TX_OK; 418 atomic_inc(&txq->pending_sends); 419 420 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq); 421 422 /* skb may be freed after mana_gd_post_work_request. Do not use it. */ 423 skb = NULL; 424 425 tx_stats = &txq->stats; 426 u64_stats_update_begin(&tx_stats->syncp); 427 tx_stats->packets++; 428 tx_stats->bytes += len; 429 u64_stats_update_end(&tx_stats->syncp); 430 431 tx_busy: 432 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) { 433 netif_tx_wake_queue(net_txq); 434 apc->eth_stats.wake_queue++; 435 } 436 437 kfree(pkg.sgl_ptr); 438 return err; 439 440 free_sgl_ptr: 441 kfree(pkg.sgl_ptr); 442 tx_drop_count: 443 ndev->stats.tx_dropped++; 444 tx_drop: 445 dev_kfree_skb_any(skb); 446 return NETDEV_TX_OK; 447 } 448 449 static void mana_get_stats64(struct net_device *ndev, 450 struct rtnl_link_stats64 *st) 451 { 452 struct mana_port_context *apc = netdev_priv(ndev); 453 unsigned int num_queues = apc->num_queues; 454 struct mana_stats_rx *rx_stats; 455 struct mana_stats_tx *tx_stats; 456 unsigned int start; 457 u64 packets, bytes; 458 int q; 459 460 if (!apc->port_is_up) 461 return; 462 463 netdev_stats_to_stats64(st, &ndev->stats); 464 465 for (q = 0; q < num_queues; q++) { 466 rx_stats = &apc->rxqs[q]->stats; 467 468 do { 469 start = u64_stats_fetch_begin(&rx_stats->syncp); 470 packets = rx_stats->packets; 471 bytes = rx_stats->bytes; 472 } while (u64_stats_fetch_retry(&rx_stats->syncp, start)); 473 474 st->rx_packets += packets; 475 st->rx_bytes += bytes; 476 } 477 478 for (q = 0; q < num_queues; q++) { 479 tx_stats = &apc->tx_qp[q].txq.stats; 480 481 do { 482 start = u64_stats_fetch_begin(&tx_stats->syncp); 483 packets = tx_stats->packets; 484 bytes = tx_stats->bytes; 485 } while (u64_stats_fetch_retry(&tx_stats->syncp, start)); 486 487 st->tx_packets += packets; 488 st->tx_bytes += bytes; 489 } 490 } 491 492 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb, 493 int old_q) 494 { 495 struct mana_port_context *apc = netdev_priv(ndev); 496 u32 hash = skb_get_hash(skb); 497 struct sock *sk = skb->sk; 498 int txq; 499 500 txq = apc->indir_table[hash & (apc->indir_table_sz - 1)]; 501 502 if (txq != old_q && sk && sk_fullsock(sk) && 503 rcu_access_pointer(sk->sk_dst_cache)) 504 sk_tx_queue_set(sk, txq); 505 506 return txq; 507 } 508 509 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb, 510 struct net_device *sb_dev) 511 { 512 int txq; 513 514 if (ndev->real_num_tx_queues == 1) 515 return 0; 516 517 txq = sk_tx_queue_get(skb->sk); 518 519 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) { 520 if (skb_rx_queue_recorded(skb)) 521 txq = skb_get_rx_queue(skb); 522 else 523 txq = mana_get_tx_queue(ndev, skb, txq); 524 } 525 526 return txq; 527 } 528 529 /* Release pre-allocated RX buffers */ 530 void mana_pre_dealloc_rxbufs(struct mana_port_context *mpc) 531 { 532 struct device *dev; 533 int i; 534 535 dev = mpc->ac->gdma_dev->gdma_context->dev; 536 537 if (!mpc->rxbufs_pre) 538 goto out1; 539 540 if (!mpc->das_pre) 541 goto out2; 542 543 while (mpc->rxbpre_total) { 544 i = --mpc->rxbpre_total; 545 dma_unmap_single(dev, mpc->das_pre[i], mpc->rxbpre_datasize, 546 DMA_FROM_DEVICE); 547 put_page(virt_to_head_page(mpc->rxbufs_pre[i])); 548 } 549 550 kfree(mpc->das_pre); 551 mpc->das_pre = NULL; 552 553 out2: 554 kfree(mpc->rxbufs_pre); 555 mpc->rxbufs_pre = NULL; 556 557 out1: 558 mpc->rxbpre_datasize = 0; 559 mpc->rxbpre_alloc_size = 0; 560 mpc->rxbpre_headroom = 0; 561 } 562 563 /* Get a buffer from the pre-allocated RX buffers */ 564 static void *mana_get_rxbuf_pre(struct mana_rxq *rxq, dma_addr_t *da) 565 { 566 struct net_device *ndev = rxq->ndev; 567 struct mana_port_context *mpc; 568 void *va; 569 570 mpc = netdev_priv(ndev); 571 572 if (!mpc->rxbufs_pre || !mpc->das_pre || !mpc->rxbpre_total) { 573 netdev_err(ndev, "No RX pre-allocated bufs\n"); 574 return NULL; 575 } 576 577 /* Check sizes to catch unexpected coding error */ 578 if (mpc->rxbpre_datasize != rxq->datasize) { 579 netdev_err(ndev, "rxbpre_datasize mismatch: %u: %u\n", 580 mpc->rxbpre_datasize, rxq->datasize); 581 return NULL; 582 } 583 584 if (mpc->rxbpre_alloc_size != rxq->alloc_size) { 585 netdev_err(ndev, "rxbpre_alloc_size mismatch: %u: %u\n", 586 mpc->rxbpre_alloc_size, rxq->alloc_size); 587 return NULL; 588 } 589 590 if (mpc->rxbpre_headroom != rxq->headroom) { 591 netdev_err(ndev, "rxbpre_headroom mismatch: %u: %u\n", 592 mpc->rxbpre_headroom, rxq->headroom); 593 return NULL; 594 } 595 596 mpc->rxbpre_total--; 597 598 *da = mpc->das_pre[mpc->rxbpre_total]; 599 va = mpc->rxbufs_pre[mpc->rxbpre_total]; 600 mpc->rxbufs_pre[mpc->rxbpre_total] = NULL; 601 602 /* Deallocate the array after all buffers are gone */ 603 if (!mpc->rxbpre_total) 604 mana_pre_dealloc_rxbufs(mpc); 605 606 return va; 607 } 608 609 /* Get RX buffer's data size, alloc size, XDP headroom based on MTU */ 610 static void mana_get_rxbuf_cfg(int mtu, u32 *datasize, u32 *alloc_size, 611 u32 *headroom) 612 { 613 if (mtu > MANA_XDP_MTU_MAX) 614 *headroom = 0; /* no support for XDP */ 615 else 616 *headroom = XDP_PACKET_HEADROOM; 617 618 *alloc_size = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD + *headroom); 619 620 /* Using page pool in this case, so alloc_size is PAGE_SIZE */ 621 if (*alloc_size < PAGE_SIZE) 622 *alloc_size = PAGE_SIZE; 623 624 *datasize = mtu + ETH_HLEN; 625 } 626 627 int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu, int num_queues) 628 { 629 struct device *dev; 630 struct page *page; 631 dma_addr_t da; 632 int num_rxb; 633 void *va; 634 int i; 635 636 mana_get_rxbuf_cfg(new_mtu, &mpc->rxbpre_datasize, 637 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom); 638 639 dev = mpc->ac->gdma_dev->gdma_context->dev; 640 641 num_rxb = num_queues * mpc->rx_queue_size; 642 643 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n"); 644 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL); 645 if (!mpc->rxbufs_pre) 646 goto error; 647 648 mpc->das_pre = kmalloc_array(num_rxb, sizeof(dma_addr_t), GFP_KERNEL); 649 if (!mpc->das_pre) 650 goto error; 651 652 mpc->rxbpre_total = 0; 653 654 for (i = 0; i < num_rxb; i++) { 655 if (mpc->rxbpre_alloc_size > PAGE_SIZE) { 656 va = netdev_alloc_frag(mpc->rxbpre_alloc_size); 657 if (!va) 658 goto error; 659 660 page = virt_to_head_page(va); 661 /* Check if the frag falls back to single page */ 662 if (compound_order(page) < 663 get_order(mpc->rxbpre_alloc_size)) { 664 put_page(page); 665 goto error; 666 } 667 } else { 668 page = dev_alloc_page(); 669 if (!page) 670 goto error; 671 672 va = page_to_virt(page); 673 } 674 675 da = dma_map_single(dev, va + mpc->rxbpre_headroom, 676 mpc->rxbpre_datasize, DMA_FROM_DEVICE); 677 if (dma_mapping_error(dev, da)) { 678 put_page(virt_to_head_page(va)); 679 goto error; 680 } 681 682 mpc->rxbufs_pre[i] = va; 683 mpc->das_pre[i] = da; 684 mpc->rxbpre_total = i + 1; 685 } 686 687 return 0; 688 689 error: 690 mana_pre_dealloc_rxbufs(mpc); 691 return -ENOMEM; 692 } 693 694 static int mana_change_mtu(struct net_device *ndev, int new_mtu) 695 { 696 struct mana_port_context *mpc = netdev_priv(ndev); 697 unsigned int old_mtu = ndev->mtu; 698 int err; 699 700 /* Pre-allocate buffers to prevent failure in mana_attach later */ 701 err = mana_pre_alloc_rxbufs(mpc, new_mtu, mpc->num_queues); 702 if (err) { 703 netdev_err(ndev, "Insufficient memory for new MTU\n"); 704 return err; 705 } 706 707 err = mana_detach(ndev, false); 708 if (err) { 709 netdev_err(ndev, "mana_detach failed: %d\n", err); 710 goto out; 711 } 712 713 WRITE_ONCE(ndev->mtu, new_mtu); 714 715 err = mana_attach(ndev); 716 if (err) { 717 netdev_err(ndev, "mana_attach failed: %d\n", err); 718 WRITE_ONCE(ndev->mtu, old_mtu); 719 } 720 721 out: 722 mana_pre_dealloc_rxbufs(mpc); 723 return err; 724 } 725 726 static const struct net_device_ops mana_devops = { 727 .ndo_open = mana_open, 728 .ndo_stop = mana_close, 729 .ndo_select_queue = mana_select_queue, 730 .ndo_start_xmit = mana_start_xmit, 731 .ndo_validate_addr = eth_validate_addr, 732 .ndo_get_stats64 = mana_get_stats64, 733 .ndo_bpf = mana_bpf, 734 .ndo_xdp_xmit = mana_xdp_xmit, 735 .ndo_change_mtu = mana_change_mtu, 736 }; 737 738 static void mana_cleanup_port_context(struct mana_port_context *apc) 739 { 740 /* 741 * at this point all dir/files under the vport directory 742 * are already cleaned up. 743 * We are sure the apc->mana_port_debugfs remove will not 744 * cause any freed memory access issues 745 */ 746 debugfs_remove(apc->mana_port_debugfs); 747 kfree(apc->rxqs); 748 apc->rxqs = NULL; 749 } 750 751 static void mana_cleanup_indir_table(struct mana_port_context *apc) 752 { 753 apc->indir_table_sz = 0; 754 kfree(apc->indir_table); 755 kfree(apc->rxobj_table); 756 } 757 758 static int mana_init_port_context(struct mana_port_context *apc) 759 { 760 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 761 GFP_KERNEL); 762 763 return !apc->rxqs ? -ENOMEM : 0; 764 } 765 766 static int mana_send_request(struct mana_context *ac, void *in_buf, 767 u32 in_len, void *out_buf, u32 out_len) 768 { 769 struct gdma_context *gc = ac->gdma_dev->gdma_context; 770 struct gdma_resp_hdr *resp = out_buf; 771 struct gdma_req_hdr *req = in_buf; 772 struct device *dev = gc->dev; 773 static atomic_t activity_id; 774 int err; 775 776 req->dev_id = gc->mana.dev_id; 777 req->activity_id = atomic_inc_return(&activity_id); 778 779 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 780 out_buf); 781 if (err || resp->status) { 782 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 783 err, resp->status); 784 return err ? err : -EPROTO; 785 } 786 787 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 788 req->activity_id != resp->activity_id) { 789 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 790 req->dev_id.as_uint32, resp->dev_id.as_uint32, 791 req->activity_id, resp->activity_id); 792 return -EPROTO; 793 } 794 795 return 0; 796 } 797 798 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 799 const enum mana_command_code expected_code, 800 const u32 min_size) 801 { 802 if (resp_hdr->response.msg_type != expected_code) 803 return -EPROTO; 804 805 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 806 return -EPROTO; 807 808 if (resp_hdr->response.msg_size < min_size) 809 return -EPROTO; 810 811 return 0; 812 } 813 814 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 815 { 816 struct mana_register_hw_vport_resp resp = {}; 817 struct mana_register_hw_vport_req req = {}; 818 int err; 819 820 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 821 sizeof(req), sizeof(resp)); 822 req.attached_gfid = 1; 823 req.is_pf_default_vport = 1; 824 req.allow_all_ether_types = 1; 825 826 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 827 sizeof(resp)); 828 if (err) { 829 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 830 return err; 831 } 832 833 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 834 sizeof(resp)); 835 if (err || resp.hdr.status) { 836 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 837 err, resp.hdr.status); 838 return err ? err : -EPROTO; 839 } 840 841 apc->port_handle = resp.hw_vport_handle; 842 return 0; 843 } 844 845 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 846 { 847 struct mana_deregister_hw_vport_resp resp = {}; 848 struct mana_deregister_hw_vport_req req = {}; 849 int err; 850 851 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 852 sizeof(req), sizeof(resp)); 853 req.hw_vport_handle = apc->port_handle; 854 855 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 856 sizeof(resp)); 857 if (err) { 858 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 859 err); 860 return; 861 } 862 863 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 864 sizeof(resp)); 865 if (err || resp.hdr.status) 866 netdev_err(apc->ndev, 867 "Failed to deregister hw vPort: %d, 0x%x\n", 868 err, resp.hdr.status); 869 } 870 871 static int mana_pf_register_filter(struct mana_port_context *apc) 872 { 873 struct mana_register_filter_resp resp = {}; 874 struct mana_register_filter_req req = {}; 875 int err; 876 877 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 878 sizeof(req), sizeof(resp)); 879 req.vport = apc->port_handle; 880 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 881 882 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 883 sizeof(resp)); 884 if (err) { 885 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 886 return err; 887 } 888 889 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 890 sizeof(resp)); 891 if (err || resp.hdr.status) { 892 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 893 err, resp.hdr.status); 894 return err ? err : -EPROTO; 895 } 896 897 apc->pf_filter_handle = resp.filter_handle; 898 return 0; 899 } 900 901 static void mana_pf_deregister_filter(struct mana_port_context *apc) 902 { 903 struct mana_deregister_filter_resp resp = {}; 904 struct mana_deregister_filter_req req = {}; 905 int err; 906 907 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 908 sizeof(req), sizeof(resp)); 909 req.filter_handle = apc->pf_filter_handle; 910 911 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 912 sizeof(resp)); 913 if (err) { 914 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 915 err); 916 return; 917 } 918 919 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 920 sizeof(resp)); 921 if (err || resp.hdr.status) 922 netdev_err(apc->ndev, 923 "Failed to deregister filter: %d, 0x%x\n", 924 err, resp.hdr.status); 925 } 926 927 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 928 u32 proto_minor_ver, u32 proto_micro_ver, 929 u16 *max_num_vports) 930 { 931 struct gdma_context *gc = ac->gdma_dev->gdma_context; 932 struct mana_query_device_cfg_resp resp = {}; 933 struct mana_query_device_cfg_req req = {}; 934 struct device *dev = gc->dev; 935 int err = 0; 936 937 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 938 sizeof(req), sizeof(resp)); 939 940 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 941 942 req.proto_major_ver = proto_major_ver; 943 req.proto_minor_ver = proto_minor_ver; 944 req.proto_micro_ver = proto_micro_ver; 945 946 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 947 if (err) { 948 dev_err(dev, "Failed to query config: %d", err); 949 return err; 950 } 951 952 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 953 sizeof(resp)); 954 if (err || resp.hdr.status) { 955 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 956 resp.hdr.status); 957 if (!err) 958 err = -EPROTO; 959 return err; 960 } 961 962 *max_num_vports = resp.max_num_vports; 963 964 if (resp.hdr.response.msg_version == GDMA_MESSAGE_V2) 965 gc->adapter_mtu = resp.adapter_mtu; 966 else 967 gc->adapter_mtu = ETH_FRAME_LEN; 968 969 debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc->adapter_mtu); 970 971 return 0; 972 } 973 974 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 975 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 976 { 977 struct mana_query_vport_cfg_resp resp = {}; 978 struct mana_query_vport_cfg_req req = {}; 979 int err; 980 981 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 982 sizeof(req), sizeof(resp)); 983 984 req.vport_index = vport_index; 985 986 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 987 sizeof(resp)); 988 if (err) 989 return err; 990 991 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 992 sizeof(resp)); 993 if (err) 994 return err; 995 996 if (resp.hdr.status) 997 return -EPROTO; 998 999 *max_sq = resp.max_num_sq; 1000 *max_rq = resp.max_num_rq; 1001 if (resp.num_indirection_ent > 0 && 1002 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE && 1003 is_power_of_2(resp.num_indirection_ent)) { 1004 *num_indir_entry = resp.num_indirection_ent; 1005 } else { 1006 netdev_warn(apc->ndev, 1007 "Setting indirection table size to default %d for vPort %d\n", 1008 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx); 1009 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE; 1010 } 1011 1012 apc->port_handle = resp.vport; 1013 ether_addr_copy(apc->mac_addr, resp.mac_addr); 1014 1015 return 0; 1016 } 1017 1018 void mana_uncfg_vport(struct mana_port_context *apc) 1019 { 1020 mutex_lock(&apc->vport_mutex); 1021 apc->vport_use_count--; 1022 WARN_ON(apc->vport_use_count < 0); 1023 mutex_unlock(&apc->vport_mutex); 1024 } 1025 EXPORT_SYMBOL_NS(mana_uncfg_vport, "NET_MANA"); 1026 1027 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 1028 u32 doorbell_pg_id) 1029 { 1030 struct mana_config_vport_resp resp = {}; 1031 struct mana_config_vport_req req = {}; 1032 int err; 1033 1034 /* This function is used to program the Ethernet port in the hardware 1035 * table. It can be called from the Ethernet driver or the RDMA driver. 1036 * 1037 * For Ethernet usage, the hardware supports only one active user on a 1038 * physical port. The driver checks on the port usage before programming 1039 * the hardware when creating the RAW QP (RDMA driver) or exposing the 1040 * device to kernel NET layer (Ethernet driver). 1041 * 1042 * Because the RDMA driver doesn't know in advance which QP type the 1043 * user will create, it exposes the device with all its ports. The user 1044 * may not be able to create RAW QP on a port if this port is already 1045 * in used by the Ethernet driver from the kernel. 1046 * 1047 * This physical port limitation only applies to the RAW QP. For RC QP, 1048 * the hardware doesn't have this limitation. The user can create RC 1049 * QPs on a physical port up to the hardware limits independent of the 1050 * Ethernet usage on the same port. 1051 */ 1052 mutex_lock(&apc->vport_mutex); 1053 if (apc->vport_use_count > 0) { 1054 mutex_unlock(&apc->vport_mutex); 1055 return -EBUSY; 1056 } 1057 apc->vport_use_count++; 1058 mutex_unlock(&apc->vport_mutex); 1059 1060 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1061 sizeof(req), sizeof(resp)); 1062 req.vport = apc->port_handle; 1063 req.pdid = protection_dom_id; 1064 req.doorbell_pageid = doorbell_pg_id; 1065 1066 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1067 sizeof(resp)); 1068 if (err) { 1069 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1070 goto out; 1071 } 1072 1073 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1074 sizeof(resp)); 1075 if (err || resp.hdr.status) { 1076 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1077 err, resp.hdr.status); 1078 if (!err) 1079 err = -EPROTO; 1080 1081 goto out; 1082 } 1083 1084 apc->tx_shortform_allowed = resp.short_form_allowed; 1085 apc->tx_vp_offset = resp.tx_vport_offset; 1086 1087 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 1088 apc->port_handle, protection_dom_id, doorbell_pg_id); 1089 out: 1090 if (err) 1091 mana_uncfg_vport(apc); 1092 1093 return err; 1094 } 1095 EXPORT_SYMBOL_NS(mana_cfg_vport, "NET_MANA"); 1096 1097 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1098 enum TRI_STATE rx, 1099 bool update_default_rxobj, bool update_key, 1100 bool update_tab) 1101 { 1102 struct mana_cfg_rx_steer_req_v2 *req; 1103 struct mana_cfg_rx_steer_resp resp = {}; 1104 struct net_device *ndev = apc->ndev; 1105 u32 req_buf_size; 1106 int err; 1107 1108 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz); 1109 req = kzalloc(req_buf_size, GFP_KERNEL); 1110 if (!req) 1111 return -ENOMEM; 1112 1113 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1114 sizeof(resp)); 1115 1116 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1117 1118 req->vport = apc->port_handle; 1119 req->num_indir_entries = apc->indir_table_sz; 1120 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, 1121 indir_tab); 1122 req->rx_enable = rx; 1123 req->rss_enable = apc->rss_state; 1124 req->update_default_rxobj = update_default_rxobj; 1125 req->update_hashkey = update_key; 1126 req->update_indir_tab = update_tab; 1127 req->default_rxobj = apc->default_rxobj; 1128 req->cqe_coalescing_enable = 0; 1129 1130 if (update_key) 1131 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1132 1133 if (update_tab) 1134 memcpy(req->indir_tab, apc->rxobj_table, 1135 flex_array_size(req, indir_tab, req->num_indir_entries)); 1136 1137 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1138 sizeof(resp)); 1139 if (err) { 1140 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1141 goto out; 1142 } 1143 1144 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1145 sizeof(resp)); 1146 if (err) { 1147 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1148 goto out; 1149 } 1150 1151 if (resp.hdr.status) { 1152 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1153 resp.hdr.status); 1154 err = -EPROTO; 1155 } 1156 1157 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1158 apc->port_handle, apc->indir_table_sz); 1159 out: 1160 kfree(req); 1161 return err; 1162 } 1163 1164 int mana_create_wq_obj(struct mana_port_context *apc, 1165 mana_handle_t vport, 1166 u32 wq_type, struct mana_obj_spec *wq_spec, 1167 struct mana_obj_spec *cq_spec, 1168 mana_handle_t *wq_obj) 1169 { 1170 struct mana_create_wqobj_resp resp = {}; 1171 struct mana_create_wqobj_req req = {}; 1172 struct net_device *ndev = apc->ndev; 1173 int err; 1174 1175 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1176 sizeof(req), sizeof(resp)); 1177 req.vport = vport; 1178 req.wq_type = wq_type; 1179 req.wq_gdma_region = wq_spec->gdma_region; 1180 req.cq_gdma_region = cq_spec->gdma_region; 1181 req.wq_size = wq_spec->queue_size; 1182 req.cq_size = cq_spec->queue_size; 1183 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1184 req.cq_parent_qid = cq_spec->attached_eq; 1185 1186 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1187 sizeof(resp)); 1188 if (err) { 1189 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1190 goto out; 1191 } 1192 1193 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1194 sizeof(resp)); 1195 if (err || resp.hdr.status) { 1196 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1197 resp.hdr.status); 1198 if (!err) 1199 err = -EPROTO; 1200 goto out; 1201 } 1202 1203 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1204 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1205 err = -EPROTO; 1206 goto out; 1207 } 1208 1209 *wq_obj = resp.wq_obj; 1210 wq_spec->queue_index = resp.wq_id; 1211 cq_spec->queue_index = resp.cq_id; 1212 1213 return 0; 1214 out: 1215 return err; 1216 } 1217 EXPORT_SYMBOL_NS(mana_create_wq_obj, "NET_MANA"); 1218 1219 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1220 mana_handle_t wq_obj) 1221 { 1222 struct mana_destroy_wqobj_resp resp = {}; 1223 struct mana_destroy_wqobj_req req = {}; 1224 struct net_device *ndev = apc->ndev; 1225 int err; 1226 1227 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1228 sizeof(req), sizeof(resp)); 1229 req.wq_type = wq_type; 1230 req.wq_obj_handle = wq_obj; 1231 1232 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1233 sizeof(resp)); 1234 if (err) { 1235 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1236 return; 1237 } 1238 1239 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1240 sizeof(resp)); 1241 if (err || resp.hdr.status) 1242 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1243 resp.hdr.status); 1244 } 1245 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, "NET_MANA"); 1246 1247 static void mana_destroy_eq(struct mana_context *ac) 1248 { 1249 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1250 struct gdma_queue *eq; 1251 int i; 1252 1253 if (!ac->eqs) 1254 return; 1255 1256 debugfs_remove_recursive(ac->mana_eqs_debugfs); 1257 1258 for (i = 0; i < gc->max_num_queues; i++) { 1259 eq = ac->eqs[i].eq; 1260 if (!eq) 1261 continue; 1262 1263 mana_gd_destroy_queue(gc, eq); 1264 } 1265 1266 kfree(ac->eqs); 1267 ac->eqs = NULL; 1268 } 1269 1270 static void mana_create_eq_debugfs(struct mana_context *ac, int i) 1271 { 1272 struct mana_eq eq = ac->eqs[i]; 1273 char eqnum[32]; 1274 1275 sprintf(eqnum, "eq%d", i); 1276 eq.mana_eq_debugfs = debugfs_create_dir(eqnum, ac->mana_eqs_debugfs); 1277 debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head); 1278 debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail); 1279 debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops); 1280 } 1281 1282 static int mana_create_eq(struct mana_context *ac) 1283 { 1284 struct gdma_dev *gd = ac->gdma_dev; 1285 struct gdma_context *gc = gd->gdma_context; 1286 struct gdma_queue_spec spec = {}; 1287 int err; 1288 int i; 1289 1290 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq), 1291 GFP_KERNEL); 1292 if (!ac->eqs) 1293 return -ENOMEM; 1294 1295 spec.type = GDMA_EQ; 1296 spec.monitor_avl_buf = false; 1297 spec.queue_size = EQ_SIZE; 1298 spec.eq.callback = NULL; 1299 spec.eq.context = ac->eqs; 1300 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; 1301 1302 ac->mana_eqs_debugfs = debugfs_create_dir("EQs", gc->mana_pci_debugfs); 1303 1304 for (i = 0; i < gc->max_num_queues; i++) { 1305 spec.eq.msix_index = (i + 1) % gc->num_msix_usable; 1306 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq); 1307 if (err) 1308 goto out; 1309 mana_create_eq_debugfs(ac, i); 1310 } 1311 1312 return 0; 1313 out: 1314 mana_destroy_eq(ac); 1315 return err; 1316 } 1317 1318 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq) 1319 { 1320 struct mana_fence_rq_resp resp = {}; 1321 struct mana_fence_rq_req req = {}; 1322 int err; 1323 1324 init_completion(&rxq->fence_event); 1325 1326 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ, 1327 sizeof(req), sizeof(resp)); 1328 req.wq_obj_handle = rxq->rxobj; 1329 1330 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1331 sizeof(resp)); 1332 if (err) { 1333 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n", 1334 rxq->rxq_idx, err); 1335 return err; 1336 } 1337 1338 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp)); 1339 if (err || resp.hdr.status) { 1340 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n", 1341 rxq->rxq_idx, err, resp.hdr.status); 1342 if (!err) 1343 err = -EPROTO; 1344 1345 return err; 1346 } 1347 1348 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) { 1349 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n", 1350 rxq->rxq_idx); 1351 return -ETIMEDOUT; 1352 } 1353 1354 return 0; 1355 } 1356 1357 static void mana_fence_rqs(struct mana_port_context *apc) 1358 { 1359 unsigned int rxq_idx; 1360 struct mana_rxq *rxq; 1361 int err; 1362 1363 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 1364 rxq = apc->rxqs[rxq_idx]; 1365 err = mana_fence_rq(apc, rxq); 1366 1367 /* In case of any error, use sleep instead. */ 1368 if (err) 1369 msleep(100); 1370 } 1371 } 1372 1373 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units) 1374 { 1375 u32 used_space_old; 1376 u32 used_space_new; 1377 1378 used_space_old = wq->head - wq->tail; 1379 used_space_new = wq->head - (wq->tail + num_units); 1380 1381 if (WARN_ON_ONCE(used_space_new > used_space_old)) 1382 return -ERANGE; 1383 1384 wq->tail += num_units; 1385 return 0; 1386 } 1387 1388 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc) 1389 { 1390 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head; 1391 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 1392 struct device *dev = gc->dev; 1393 int hsg, i; 1394 1395 /* Number of SGEs of linear part */ 1396 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1; 1397 1398 for (i = 0; i < hsg; i++) 1399 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i], 1400 DMA_TO_DEVICE); 1401 1402 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++) 1403 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i], 1404 DMA_TO_DEVICE); 1405 } 1406 1407 static void mana_poll_tx_cq(struct mana_cq *cq) 1408 { 1409 struct gdma_comp *completions = cq->gdma_comp_buf; 1410 struct gdma_posted_wqe_info *wqe_info; 1411 unsigned int pkt_transmitted = 0; 1412 unsigned int wqe_unit_cnt = 0; 1413 struct mana_txq *txq = cq->txq; 1414 struct mana_port_context *apc; 1415 struct netdev_queue *net_txq; 1416 struct gdma_queue *gdma_wq; 1417 unsigned int avail_space; 1418 struct net_device *ndev; 1419 struct sk_buff *skb; 1420 bool txq_stopped; 1421 int comp_read; 1422 int i; 1423 1424 ndev = txq->ndev; 1425 apc = netdev_priv(ndev); 1426 1427 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions, 1428 CQE_POLLING_BUFFER); 1429 1430 if (comp_read < 1) 1431 return; 1432 1433 for (i = 0; i < comp_read; i++) { 1434 struct mana_tx_comp_oob *cqe_oob; 1435 1436 if (WARN_ON_ONCE(!completions[i].is_sq)) 1437 return; 1438 1439 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data; 1440 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type != 1441 MANA_CQE_COMPLETION)) 1442 return; 1443 1444 switch (cqe_oob->cqe_hdr.cqe_type) { 1445 case CQE_TX_OKAY: 1446 break; 1447 1448 case CQE_TX_SA_DROP: 1449 case CQE_TX_MTU_DROP: 1450 case CQE_TX_INVALID_OOB: 1451 case CQE_TX_INVALID_ETH_TYPE: 1452 case CQE_TX_HDR_PROCESSING_ERROR: 1453 case CQE_TX_VF_DISABLED: 1454 case CQE_TX_VPORT_IDX_OUT_OF_RANGE: 1455 case CQE_TX_VPORT_DISABLED: 1456 case CQE_TX_VLAN_TAGGING_VIOLATION: 1457 if (net_ratelimit()) 1458 netdev_err(ndev, "TX: CQE error %d\n", 1459 cqe_oob->cqe_hdr.cqe_type); 1460 1461 apc->eth_stats.tx_cqe_err++; 1462 break; 1463 1464 default: 1465 /* If the CQE type is unknown, log an error, 1466 * and still free the SKB, update tail, etc. 1467 */ 1468 if (net_ratelimit()) 1469 netdev_err(ndev, "TX: unknown CQE type %d\n", 1470 cqe_oob->cqe_hdr.cqe_type); 1471 1472 apc->eth_stats.tx_cqe_unknown_type++; 1473 break; 1474 } 1475 1476 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num)) 1477 return; 1478 1479 skb = skb_dequeue(&txq->pending_skbs); 1480 if (WARN_ON_ONCE(!skb)) 1481 return; 1482 1483 wqe_info = (struct gdma_posted_wqe_info *)skb->cb; 1484 wqe_unit_cnt += wqe_info->wqe_size_in_bu; 1485 1486 mana_unmap_skb(skb, apc); 1487 1488 napi_consume_skb(skb, cq->budget); 1489 1490 pkt_transmitted++; 1491 } 1492 1493 if (WARN_ON_ONCE(wqe_unit_cnt == 0)) 1494 return; 1495 1496 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt); 1497 1498 gdma_wq = txq->gdma_sq; 1499 avail_space = mana_gd_wq_avail_space(gdma_wq); 1500 1501 /* Ensure tail updated before checking q stop */ 1502 smp_mb(); 1503 1504 net_txq = txq->net_txq; 1505 txq_stopped = netif_tx_queue_stopped(net_txq); 1506 1507 /* Ensure checking txq_stopped before apc->port_is_up. */ 1508 smp_rmb(); 1509 1510 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) { 1511 netif_tx_wake_queue(net_txq); 1512 apc->eth_stats.wake_queue++; 1513 } 1514 1515 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0) 1516 WARN_ON_ONCE(1); 1517 1518 cq->work_done = pkt_transmitted; 1519 } 1520 1521 static void mana_post_pkt_rxq(struct mana_rxq *rxq) 1522 { 1523 struct mana_recv_buf_oob *recv_buf_oob; 1524 u32 curr_index; 1525 int err; 1526 1527 curr_index = rxq->buf_index++; 1528 if (rxq->buf_index == rxq->num_rx_buf) 1529 rxq->buf_index = 0; 1530 1531 recv_buf_oob = &rxq->rx_oobs[curr_index]; 1532 1533 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req, 1534 &recv_buf_oob->wqe_inf); 1535 if (WARN_ON_ONCE(err)) 1536 return; 1537 1538 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1); 1539 } 1540 1541 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va, 1542 uint pkt_len, struct xdp_buff *xdp) 1543 { 1544 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size); 1545 1546 if (!skb) 1547 return NULL; 1548 1549 if (xdp->data_hard_start) { 1550 skb_reserve(skb, xdp->data - xdp->data_hard_start); 1551 skb_put(skb, xdp->data_end - xdp->data); 1552 return skb; 1553 } 1554 1555 skb_reserve(skb, rxq->headroom); 1556 skb_put(skb, pkt_len); 1557 1558 return skb; 1559 } 1560 1561 static void mana_rx_skb(void *buf_va, bool from_pool, 1562 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq) 1563 { 1564 struct mana_stats_rx *rx_stats = &rxq->stats; 1565 struct net_device *ndev = rxq->ndev; 1566 uint pkt_len = cqe->ppi[0].pkt_len; 1567 u16 rxq_idx = rxq->rxq_idx; 1568 struct napi_struct *napi; 1569 struct xdp_buff xdp = {}; 1570 struct sk_buff *skb; 1571 u32 hash_value; 1572 u32 act; 1573 1574 rxq->rx_cq.work_done++; 1575 napi = &rxq->rx_cq.napi; 1576 1577 if (!buf_va) { 1578 ++ndev->stats.rx_dropped; 1579 return; 1580 } 1581 1582 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len); 1583 1584 if (act == XDP_REDIRECT && !rxq->xdp_rc) 1585 return; 1586 1587 if (act != XDP_PASS && act != XDP_TX) 1588 goto drop_xdp; 1589 1590 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp); 1591 1592 if (!skb) 1593 goto drop; 1594 1595 if (from_pool) 1596 skb_mark_for_recycle(skb); 1597 1598 skb->dev = napi->dev; 1599 1600 skb->protocol = eth_type_trans(skb, ndev); 1601 skb_checksum_none_assert(skb); 1602 skb_record_rx_queue(skb, rxq_idx); 1603 1604 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) { 1605 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed) 1606 skb->ip_summed = CHECKSUM_UNNECESSARY; 1607 } 1608 1609 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) { 1610 hash_value = cqe->ppi[0].pkt_hash; 1611 1612 if (cqe->rx_hashtype & MANA_HASH_L4) 1613 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4); 1614 else 1615 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); 1616 } 1617 1618 if (cqe->rx_vlantag_present) { 1619 u16 vlan_tci = cqe->rx_vlan_id; 1620 1621 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1622 } 1623 1624 u64_stats_update_begin(&rx_stats->syncp); 1625 rx_stats->packets++; 1626 rx_stats->bytes += pkt_len; 1627 1628 if (act == XDP_TX) 1629 rx_stats->xdp_tx++; 1630 u64_stats_update_end(&rx_stats->syncp); 1631 1632 if (act == XDP_TX) { 1633 skb_set_queue_mapping(skb, rxq_idx); 1634 mana_xdp_tx(skb, ndev); 1635 return; 1636 } 1637 1638 napi_gro_receive(napi, skb); 1639 1640 return; 1641 1642 drop_xdp: 1643 u64_stats_update_begin(&rx_stats->syncp); 1644 rx_stats->xdp_drop++; 1645 u64_stats_update_end(&rx_stats->syncp); 1646 1647 drop: 1648 if (from_pool) { 1649 page_pool_recycle_direct(rxq->page_pool, 1650 virt_to_head_page(buf_va)); 1651 } else { 1652 WARN_ON_ONCE(rxq->xdp_save_va); 1653 /* Save for reuse */ 1654 rxq->xdp_save_va = buf_va; 1655 } 1656 1657 ++ndev->stats.rx_dropped; 1658 1659 return; 1660 } 1661 1662 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, 1663 dma_addr_t *da, bool *from_pool, bool is_napi) 1664 { 1665 struct page *page; 1666 void *va; 1667 1668 *from_pool = false; 1669 1670 /* Reuse XDP dropped page if available */ 1671 if (rxq->xdp_save_va) { 1672 va = rxq->xdp_save_va; 1673 rxq->xdp_save_va = NULL; 1674 } else if (rxq->alloc_size > PAGE_SIZE) { 1675 if (is_napi) 1676 va = napi_alloc_frag(rxq->alloc_size); 1677 else 1678 va = netdev_alloc_frag(rxq->alloc_size); 1679 1680 if (!va) 1681 return NULL; 1682 1683 page = virt_to_head_page(va); 1684 /* Check if the frag falls back to single page */ 1685 if (compound_order(page) < get_order(rxq->alloc_size)) { 1686 put_page(page); 1687 return NULL; 1688 } 1689 } else { 1690 page = page_pool_dev_alloc_pages(rxq->page_pool); 1691 if (!page) 1692 return NULL; 1693 1694 *from_pool = true; 1695 va = page_to_virt(page); 1696 } 1697 1698 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize, 1699 DMA_FROM_DEVICE); 1700 if (dma_mapping_error(dev, *da)) { 1701 if (*from_pool) 1702 page_pool_put_full_page(rxq->page_pool, page, false); 1703 else 1704 put_page(virt_to_head_page(va)); 1705 1706 return NULL; 1707 } 1708 1709 return va; 1710 } 1711 1712 /* Allocate frag for rx buffer, and save the old buf */ 1713 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq, 1714 struct mana_recv_buf_oob *rxoob, void **old_buf, 1715 bool *old_fp) 1716 { 1717 bool from_pool; 1718 dma_addr_t da; 1719 void *va; 1720 1721 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, true); 1722 if (!va) 1723 return; 1724 1725 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize, 1726 DMA_FROM_DEVICE); 1727 *old_buf = rxoob->buf_va; 1728 *old_fp = rxoob->from_pool; 1729 1730 rxoob->buf_va = va; 1731 rxoob->sgl[0].address = da; 1732 rxoob->from_pool = from_pool; 1733 } 1734 1735 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq, 1736 struct gdma_comp *cqe) 1737 { 1738 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data; 1739 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1740 struct net_device *ndev = rxq->ndev; 1741 struct mana_recv_buf_oob *rxbuf_oob; 1742 struct mana_port_context *apc; 1743 struct device *dev = gc->dev; 1744 void *old_buf = NULL; 1745 u32 curr, pktlen; 1746 bool old_fp; 1747 1748 apc = netdev_priv(ndev); 1749 1750 switch (oob->cqe_hdr.cqe_type) { 1751 case CQE_RX_OKAY: 1752 break; 1753 1754 case CQE_RX_TRUNCATED: 1755 ++ndev->stats.rx_dropped; 1756 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index]; 1757 netdev_warn_once(ndev, "Dropped a truncated packet\n"); 1758 goto drop; 1759 1760 case CQE_RX_COALESCED_4: 1761 netdev_err(ndev, "RX coalescing is unsupported\n"); 1762 apc->eth_stats.rx_coalesced_err++; 1763 return; 1764 1765 case CQE_RX_OBJECT_FENCE: 1766 complete(&rxq->fence_event); 1767 return; 1768 1769 default: 1770 netdev_err(ndev, "Unknown RX CQE type = %d\n", 1771 oob->cqe_hdr.cqe_type); 1772 apc->eth_stats.rx_cqe_unknown_type++; 1773 return; 1774 } 1775 1776 pktlen = oob->ppi[0].pkt_len; 1777 1778 if (pktlen == 0) { 1779 /* data packets should never have packetlength of zero */ 1780 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n", 1781 rxq->gdma_id, cq->gdma_id, rxq->rxobj); 1782 return; 1783 } 1784 1785 curr = rxq->buf_index; 1786 rxbuf_oob = &rxq->rx_oobs[curr]; 1787 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1); 1788 1789 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp); 1790 1791 /* Unsuccessful refill will have old_buf == NULL. 1792 * In this case, mana_rx_skb() will drop the packet. 1793 */ 1794 mana_rx_skb(old_buf, old_fp, oob, rxq); 1795 1796 drop: 1797 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu); 1798 1799 mana_post_pkt_rxq(rxq); 1800 } 1801 1802 static void mana_poll_rx_cq(struct mana_cq *cq) 1803 { 1804 struct gdma_comp *comp = cq->gdma_comp_buf; 1805 struct mana_rxq *rxq = cq->rxq; 1806 int comp_read, i; 1807 1808 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER); 1809 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER); 1810 1811 rxq->xdp_flush = false; 1812 1813 for (i = 0; i < comp_read; i++) { 1814 if (WARN_ON_ONCE(comp[i].is_sq)) 1815 return; 1816 1817 /* verify recv cqe references the right rxq */ 1818 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id)) 1819 return; 1820 1821 mana_process_rx_cqe(rxq, cq, &comp[i]); 1822 } 1823 1824 if (comp_read > 0) { 1825 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context; 1826 1827 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq); 1828 } 1829 1830 if (rxq->xdp_flush) 1831 xdp_do_flush(); 1832 } 1833 1834 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue) 1835 { 1836 struct mana_cq *cq = context; 1837 int w; 1838 1839 WARN_ON_ONCE(cq->gdma_cq != gdma_queue); 1840 1841 if (cq->type == MANA_CQ_TYPE_RX) 1842 mana_poll_rx_cq(cq); 1843 else 1844 mana_poll_tx_cq(cq); 1845 1846 w = cq->work_done; 1847 cq->work_done_since_doorbell += w; 1848 1849 if (w < cq->budget) { 1850 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT); 1851 cq->work_done_since_doorbell = 0; 1852 napi_complete_done(&cq->napi, w); 1853 } else if (cq->work_done_since_doorbell > 1854 cq->gdma_cq->queue_size / COMP_ENTRY_SIZE * 4) { 1855 /* MANA hardware requires at least one doorbell ring every 8 1856 * wraparounds of CQ even if there is no need to arm the CQ. 1857 * This driver rings the doorbell as soon as we have exceeded 1858 * 4 wraparounds. 1859 */ 1860 mana_gd_ring_cq(gdma_queue, 0); 1861 cq->work_done_since_doorbell = 0; 1862 } 1863 1864 return w; 1865 } 1866 1867 static int mana_poll(struct napi_struct *napi, int budget) 1868 { 1869 struct mana_cq *cq = container_of(napi, struct mana_cq, napi); 1870 int w; 1871 1872 cq->work_done = 0; 1873 cq->budget = budget; 1874 1875 w = mana_cq_handler(cq, cq->gdma_cq); 1876 1877 return min(w, budget); 1878 } 1879 1880 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue) 1881 { 1882 struct mana_cq *cq = context; 1883 1884 napi_schedule_irqoff(&cq->napi); 1885 } 1886 1887 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq) 1888 { 1889 struct gdma_dev *gd = apc->ac->gdma_dev; 1890 1891 if (!cq->gdma_cq) 1892 return; 1893 1894 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq); 1895 } 1896 1897 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq) 1898 { 1899 struct gdma_dev *gd = apc->ac->gdma_dev; 1900 1901 if (!txq->gdma_sq) 1902 return; 1903 1904 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq); 1905 } 1906 1907 static void mana_destroy_txq(struct mana_port_context *apc) 1908 { 1909 struct napi_struct *napi; 1910 int i; 1911 1912 if (!apc->tx_qp) 1913 return; 1914 1915 for (i = 0; i < apc->num_queues; i++) { 1916 debugfs_remove_recursive(apc->tx_qp[i].mana_tx_debugfs); 1917 1918 napi = &apc->tx_qp[i].tx_cq.napi; 1919 if (apc->tx_qp[i].txq.napi_initialized) { 1920 napi_synchronize(napi); 1921 napi_disable(napi); 1922 netif_napi_del(napi); 1923 apc->tx_qp[i].txq.napi_initialized = false; 1924 } 1925 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1926 1927 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1928 1929 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1930 } 1931 1932 kfree(apc->tx_qp); 1933 apc->tx_qp = NULL; 1934 } 1935 1936 static void mana_create_txq_debugfs(struct mana_port_context *apc, int idx) 1937 { 1938 struct mana_tx_qp *tx_qp = &apc->tx_qp[idx]; 1939 char qnum[32]; 1940 1941 sprintf(qnum, "TX-%d", idx); 1942 tx_qp->mana_tx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 1943 debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs, 1944 &tx_qp->txq.gdma_sq->head); 1945 debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs, 1946 &tx_qp->txq.gdma_sq->tail); 1947 debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debugfs, 1948 &tx_qp->txq.pending_skbs.qlen); 1949 debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs, 1950 &tx_qp->tx_cq.gdma_cq->head); 1951 debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs, 1952 &tx_qp->tx_cq.gdma_cq->tail); 1953 debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs, 1954 &tx_qp->tx_cq.budget); 1955 debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs, 1956 tx_qp->txq.gdma_sq, &mana_dbg_q_fops); 1957 debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs, 1958 tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops); 1959 } 1960 1961 static int mana_create_txq(struct mana_port_context *apc, 1962 struct net_device *net) 1963 { 1964 struct mana_context *ac = apc->ac; 1965 struct gdma_dev *gd = ac->gdma_dev; 1966 struct mana_obj_spec wq_spec; 1967 struct mana_obj_spec cq_spec; 1968 struct gdma_queue_spec spec; 1969 struct gdma_context *gc; 1970 struct mana_txq *txq; 1971 struct mana_cq *cq; 1972 u32 txq_size; 1973 u32 cq_size; 1974 int err; 1975 int i; 1976 1977 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1978 GFP_KERNEL); 1979 if (!apc->tx_qp) 1980 return -ENOMEM; 1981 1982 /* The minimum size of the WQE is 32 bytes, hence 1983 * apc->tx_queue_size represents the maximum number of WQEs 1984 * the SQ can store. This value is then used to size other queues 1985 * to prevent overflow. 1986 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED, 1987 * as min val of apc->tx_queue_size is 128 and that would make 1988 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size 1989 * are always power of two 1990 */ 1991 txq_size = apc->tx_queue_size * 32; 1992 1993 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE; 1994 1995 gc = gd->gdma_context; 1996 1997 for (i = 0; i < apc->num_queues; i++) { 1998 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 1999 2000 /* Create SQ */ 2001 txq = &apc->tx_qp[i].txq; 2002 2003 u64_stats_init(&txq->stats.syncp); 2004 txq->ndev = net; 2005 txq->net_txq = netdev_get_tx_queue(net, i); 2006 txq->vp_offset = apc->tx_vp_offset; 2007 txq->napi_initialized = false; 2008 skb_queue_head_init(&txq->pending_skbs); 2009 2010 memset(&spec, 0, sizeof(spec)); 2011 spec.type = GDMA_SQ; 2012 spec.monitor_avl_buf = true; 2013 spec.queue_size = txq_size; 2014 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 2015 if (err) 2016 goto out; 2017 2018 /* Create SQ's CQ */ 2019 cq = &apc->tx_qp[i].tx_cq; 2020 cq->type = MANA_CQ_TYPE_TX; 2021 2022 cq->txq = txq; 2023 2024 memset(&spec, 0, sizeof(spec)); 2025 spec.type = GDMA_CQ; 2026 spec.monitor_avl_buf = false; 2027 spec.queue_size = cq_size; 2028 spec.cq.callback = mana_schedule_napi; 2029 spec.cq.parent_eq = ac->eqs[i].eq; 2030 spec.cq.context = cq; 2031 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2032 if (err) 2033 goto out; 2034 2035 memset(&wq_spec, 0, sizeof(wq_spec)); 2036 memset(&cq_spec, 0, sizeof(cq_spec)); 2037 2038 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 2039 wq_spec.queue_size = txq->gdma_sq->queue_size; 2040 2041 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2042 cq_spec.queue_size = cq->gdma_cq->queue_size; 2043 cq_spec.modr_ctx_id = 0; 2044 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2045 2046 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 2047 &wq_spec, &cq_spec, 2048 &apc->tx_qp[i].tx_object); 2049 2050 if (err) 2051 goto out; 2052 2053 txq->gdma_sq->id = wq_spec.queue_index; 2054 cq->gdma_cq->id = cq_spec.queue_index; 2055 2056 txq->gdma_sq->mem_info.dma_region_handle = 2057 GDMA_INVALID_DMA_REGION; 2058 cq->gdma_cq->mem_info.dma_region_handle = 2059 GDMA_INVALID_DMA_REGION; 2060 2061 txq->gdma_txq_id = txq->gdma_sq->id; 2062 2063 cq->gdma_id = cq->gdma_cq->id; 2064 2065 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2066 err = -EINVAL; 2067 goto out; 2068 } 2069 2070 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2071 2072 mana_create_txq_debugfs(apc, i); 2073 2074 netif_napi_add_tx(net, &cq->napi, mana_poll); 2075 napi_enable(&cq->napi); 2076 txq->napi_initialized = true; 2077 2078 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2079 } 2080 2081 return 0; 2082 out: 2083 mana_destroy_txq(apc); 2084 return err; 2085 } 2086 2087 static void mana_destroy_rxq(struct mana_port_context *apc, 2088 struct mana_rxq *rxq, bool napi_initialized) 2089 2090 { 2091 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2092 struct mana_recv_buf_oob *rx_oob; 2093 struct device *dev = gc->dev; 2094 struct napi_struct *napi; 2095 struct page *page; 2096 int i; 2097 2098 if (!rxq) 2099 return; 2100 2101 debugfs_remove_recursive(rxq->mana_rx_debugfs); 2102 2103 napi = &rxq->rx_cq.napi; 2104 2105 if (napi_initialized) { 2106 napi_synchronize(napi); 2107 2108 napi_disable(napi); 2109 2110 netif_napi_del(napi); 2111 } 2112 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2113 2114 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2115 2116 mana_deinit_cq(apc, &rxq->rx_cq); 2117 2118 if (rxq->xdp_save_va) 2119 put_page(virt_to_head_page(rxq->xdp_save_va)); 2120 2121 for (i = 0; i < rxq->num_rx_buf; i++) { 2122 rx_oob = &rxq->rx_oobs[i]; 2123 2124 if (!rx_oob->buf_va) 2125 continue; 2126 2127 dma_unmap_single(dev, rx_oob->sgl[0].address, 2128 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2129 2130 page = virt_to_head_page(rx_oob->buf_va); 2131 2132 if (rx_oob->from_pool) 2133 page_pool_put_full_page(rxq->page_pool, page, false); 2134 else 2135 put_page(page); 2136 2137 rx_oob->buf_va = NULL; 2138 } 2139 2140 page_pool_destroy(rxq->page_pool); 2141 2142 if (rxq->gdma_rq) 2143 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2144 2145 kfree(rxq); 2146 } 2147 2148 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2149 struct mana_rxq *rxq, struct device *dev) 2150 { 2151 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2152 bool from_pool = false; 2153 dma_addr_t da; 2154 void *va; 2155 2156 if (mpc->rxbufs_pre) 2157 va = mana_get_rxbuf_pre(rxq, &da); 2158 else 2159 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, false); 2160 2161 if (!va) 2162 return -ENOMEM; 2163 2164 rx_oob->buf_va = va; 2165 rx_oob->from_pool = from_pool; 2166 2167 rx_oob->sgl[0].address = da; 2168 rx_oob->sgl[0].size = rxq->datasize; 2169 rx_oob->sgl[0].mem_key = mem_key; 2170 2171 return 0; 2172 } 2173 2174 #define MANA_WQE_HEADER_SIZE 16 2175 #define MANA_WQE_SGE_SIZE 16 2176 2177 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2178 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2179 { 2180 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2181 struct mana_recv_buf_oob *rx_oob; 2182 struct device *dev = gc->dev; 2183 u32 buf_idx; 2184 int ret; 2185 2186 WARN_ON(rxq->datasize == 0); 2187 2188 *rxq_size = 0; 2189 *cq_size = 0; 2190 2191 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2192 rx_oob = &rxq->rx_oobs[buf_idx]; 2193 memset(rx_oob, 0, sizeof(*rx_oob)); 2194 2195 rx_oob->num_sge = 1; 2196 2197 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2198 dev); 2199 if (ret) 2200 return ret; 2201 2202 rx_oob->wqe_req.sgl = rx_oob->sgl; 2203 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2204 rx_oob->wqe_req.inline_oob_size = 0; 2205 rx_oob->wqe_req.inline_oob_data = NULL; 2206 rx_oob->wqe_req.flags = 0; 2207 rx_oob->wqe_req.client_data_unit = 0; 2208 2209 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2210 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2211 *cq_size += COMP_ENTRY_SIZE; 2212 } 2213 2214 return 0; 2215 } 2216 2217 static int mana_push_wqe(struct mana_rxq *rxq) 2218 { 2219 struct mana_recv_buf_oob *rx_oob; 2220 u32 buf_idx; 2221 int err; 2222 2223 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2224 rx_oob = &rxq->rx_oobs[buf_idx]; 2225 2226 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2227 &rx_oob->wqe_inf); 2228 if (err) 2229 return -ENOSPC; 2230 } 2231 2232 return 0; 2233 } 2234 2235 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2236 { 2237 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2238 struct page_pool_params pprm = {}; 2239 int ret; 2240 2241 pprm.pool_size = mpc->rx_queue_size; 2242 pprm.nid = gc->numa_node; 2243 pprm.napi = &rxq->rx_cq.napi; 2244 pprm.netdev = rxq->ndev; 2245 2246 rxq->page_pool = page_pool_create(&pprm); 2247 2248 if (IS_ERR(rxq->page_pool)) { 2249 ret = PTR_ERR(rxq->page_pool); 2250 rxq->page_pool = NULL; 2251 return ret; 2252 } 2253 2254 return 0; 2255 } 2256 2257 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2258 u32 rxq_idx, struct mana_eq *eq, 2259 struct net_device *ndev) 2260 { 2261 struct gdma_dev *gd = apc->ac->gdma_dev; 2262 struct mana_obj_spec wq_spec; 2263 struct mana_obj_spec cq_spec; 2264 struct gdma_queue_spec spec; 2265 struct mana_cq *cq = NULL; 2266 struct gdma_context *gc; 2267 u32 cq_size, rq_size; 2268 struct mana_rxq *rxq; 2269 int err; 2270 2271 gc = gd->gdma_context; 2272 2273 rxq = kzalloc(struct_size(rxq, rx_oobs, apc->rx_queue_size), 2274 GFP_KERNEL); 2275 if (!rxq) 2276 return NULL; 2277 2278 rxq->ndev = ndev; 2279 rxq->num_rx_buf = apc->rx_queue_size; 2280 rxq->rxq_idx = rxq_idx; 2281 rxq->rxobj = INVALID_MANA_HANDLE; 2282 2283 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2284 &rxq->headroom); 2285 2286 /* Create page pool for RX queue */ 2287 err = mana_create_page_pool(rxq, gc); 2288 if (err) { 2289 netdev_err(ndev, "Create page pool err:%d\n", err); 2290 goto out; 2291 } 2292 2293 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2294 if (err) 2295 goto out; 2296 2297 rq_size = MANA_PAGE_ALIGN(rq_size); 2298 cq_size = MANA_PAGE_ALIGN(cq_size); 2299 2300 /* Create RQ */ 2301 memset(&spec, 0, sizeof(spec)); 2302 spec.type = GDMA_RQ; 2303 spec.monitor_avl_buf = true; 2304 spec.queue_size = rq_size; 2305 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2306 if (err) 2307 goto out; 2308 2309 /* Create RQ's CQ */ 2310 cq = &rxq->rx_cq; 2311 cq->type = MANA_CQ_TYPE_RX; 2312 cq->rxq = rxq; 2313 2314 memset(&spec, 0, sizeof(spec)); 2315 spec.type = GDMA_CQ; 2316 spec.monitor_avl_buf = false; 2317 spec.queue_size = cq_size; 2318 spec.cq.callback = mana_schedule_napi; 2319 spec.cq.parent_eq = eq->eq; 2320 spec.cq.context = cq; 2321 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2322 if (err) 2323 goto out; 2324 2325 memset(&wq_spec, 0, sizeof(wq_spec)); 2326 memset(&cq_spec, 0, sizeof(cq_spec)); 2327 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2328 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2329 2330 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2331 cq_spec.queue_size = cq->gdma_cq->queue_size; 2332 cq_spec.modr_ctx_id = 0; 2333 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2334 2335 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2336 &wq_spec, &cq_spec, &rxq->rxobj); 2337 if (err) 2338 goto out; 2339 2340 rxq->gdma_rq->id = wq_spec.queue_index; 2341 cq->gdma_cq->id = cq_spec.queue_index; 2342 2343 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2344 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2345 2346 rxq->gdma_id = rxq->gdma_rq->id; 2347 cq->gdma_id = cq->gdma_cq->id; 2348 2349 err = mana_push_wqe(rxq); 2350 if (err) 2351 goto out; 2352 2353 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2354 err = -EINVAL; 2355 goto out; 2356 } 2357 2358 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2359 2360 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2361 2362 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2363 cq->napi.napi_id)); 2364 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2365 rxq->page_pool)); 2366 2367 napi_enable(&cq->napi); 2368 2369 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2370 out: 2371 if (!err) 2372 return rxq; 2373 2374 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2375 2376 mana_destroy_rxq(apc, rxq, false); 2377 2378 if (cq) 2379 mana_deinit_cq(apc, cq); 2380 2381 return NULL; 2382 } 2383 2384 static void mana_create_rxq_debugfs(struct mana_port_context *apc, int idx) 2385 { 2386 struct mana_rxq *rxq; 2387 char qnum[32]; 2388 2389 rxq = apc->rxqs[idx]; 2390 2391 sprintf(qnum, "RX-%d", idx); 2392 rxq->mana_rx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 2393 debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->head); 2394 debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->tail); 2395 debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->num_rx_buf); 2396 debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs, 2397 &rxq->rx_cq.gdma_cq->head); 2398 debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs, 2399 &rxq->rx_cq.gdma_cq->tail); 2400 debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq->rx_cq.budget); 2401 debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->gdma_rq, &mana_dbg_q_fops); 2402 debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->rx_cq.gdma_cq, 2403 &mana_dbg_q_fops); 2404 } 2405 2406 static int mana_add_rx_queues(struct mana_port_context *apc, 2407 struct net_device *ndev) 2408 { 2409 struct mana_context *ac = apc->ac; 2410 struct mana_rxq *rxq; 2411 int err = 0; 2412 int i; 2413 2414 for (i = 0; i < apc->num_queues; i++) { 2415 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2416 if (!rxq) { 2417 err = -ENOMEM; 2418 goto out; 2419 } 2420 2421 u64_stats_init(&rxq->stats.syncp); 2422 2423 apc->rxqs[i] = rxq; 2424 2425 mana_create_rxq_debugfs(apc, i); 2426 } 2427 2428 apc->default_rxobj = apc->rxqs[0]->rxobj; 2429 out: 2430 return err; 2431 } 2432 2433 static void mana_destroy_vport(struct mana_port_context *apc) 2434 { 2435 struct gdma_dev *gd = apc->ac->gdma_dev; 2436 struct mana_rxq *rxq; 2437 u32 rxq_idx; 2438 2439 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2440 rxq = apc->rxqs[rxq_idx]; 2441 if (!rxq) 2442 continue; 2443 2444 mana_destroy_rxq(apc, rxq, true); 2445 apc->rxqs[rxq_idx] = NULL; 2446 } 2447 2448 mana_destroy_txq(apc); 2449 mana_uncfg_vport(apc); 2450 2451 if (gd->gdma_context->is_pf) 2452 mana_pf_deregister_hw_vport(apc); 2453 } 2454 2455 static int mana_create_vport(struct mana_port_context *apc, 2456 struct net_device *net) 2457 { 2458 struct gdma_dev *gd = apc->ac->gdma_dev; 2459 int err; 2460 2461 apc->default_rxobj = INVALID_MANA_HANDLE; 2462 2463 if (gd->gdma_context->is_pf) { 2464 err = mana_pf_register_hw_vport(apc); 2465 if (err) 2466 return err; 2467 } 2468 2469 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2470 if (err) 2471 return err; 2472 2473 return mana_create_txq(apc, net); 2474 } 2475 2476 static int mana_rss_table_alloc(struct mana_port_context *apc) 2477 { 2478 if (!apc->indir_table_sz) { 2479 netdev_err(apc->ndev, 2480 "Indirection table size not set for vPort %d\n", 2481 apc->port_idx); 2482 return -EINVAL; 2483 } 2484 2485 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL); 2486 if (!apc->indir_table) 2487 return -ENOMEM; 2488 2489 apc->rxobj_table = kcalloc(apc->indir_table_sz, sizeof(mana_handle_t), GFP_KERNEL); 2490 if (!apc->rxobj_table) { 2491 kfree(apc->indir_table); 2492 return -ENOMEM; 2493 } 2494 2495 return 0; 2496 } 2497 2498 static void mana_rss_table_init(struct mana_port_context *apc) 2499 { 2500 int i; 2501 2502 for (i = 0; i < apc->indir_table_sz; i++) 2503 apc->indir_table[i] = 2504 ethtool_rxfh_indir_default(i, apc->num_queues); 2505 } 2506 2507 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2508 bool update_hash, bool update_tab) 2509 { 2510 u32 queue_idx; 2511 int err; 2512 int i; 2513 2514 if (update_tab) { 2515 for (i = 0; i < apc->indir_table_sz; i++) { 2516 queue_idx = apc->indir_table[i]; 2517 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2518 } 2519 } 2520 2521 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2522 if (err) 2523 return err; 2524 2525 mana_fence_rqs(apc); 2526 2527 return 0; 2528 } 2529 2530 void mana_query_gf_stats(struct mana_port_context *apc) 2531 { 2532 struct mana_query_gf_stat_resp resp = {}; 2533 struct mana_query_gf_stat_req req = {}; 2534 struct net_device *ndev = apc->ndev; 2535 int err; 2536 2537 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2538 sizeof(req), sizeof(resp)); 2539 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 2540 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE | 2541 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED | 2542 STATISTICS_FLAGS_HC_RX_BYTES | 2543 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS | 2544 STATISTICS_FLAGS_HC_RX_UCAST_BYTES | 2545 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS | 2546 STATISTICS_FLAGS_HC_RX_MCAST_BYTES | 2547 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS | 2548 STATISTICS_FLAGS_HC_RX_BCAST_BYTES | 2549 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED | 2550 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED | 2551 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS | 2552 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT | 2553 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT | 2554 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT | 2555 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT | 2556 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT | 2557 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION | 2558 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB | 2559 STATISTICS_FLAGS_HC_TX_BYTES | 2560 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2561 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2562 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2563 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2564 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2565 STATISTICS_FLAGS_HC_TX_BCAST_BYTES | 2566 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR; 2567 2568 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 2569 sizeof(resp)); 2570 if (err) { 2571 netdev_err(ndev, "Failed to query GF stats: %d\n", err); 2572 return; 2573 } 2574 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2575 sizeof(resp)); 2576 if (err || resp.hdr.status) { 2577 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err, 2578 resp.hdr.status); 2579 return; 2580 } 2581 2582 apc->eth_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe; 2583 apc->eth_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled; 2584 apc->eth_stats.hc_rx_bytes = resp.hc_rx_bytes; 2585 apc->eth_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts; 2586 apc->eth_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes; 2587 apc->eth_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts; 2588 apc->eth_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes; 2589 apc->eth_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts; 2590 apc->eth_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes; 2591 apc->eth_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled; 2592 apc->eth_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled; 2593 apc->eth_stats.hc_tx_err_inval_vportoffset_pkt = 2594 resp.tx_err_inval_vport_offset_pkt; 2595 apc->eth_stats.hc_tx_err_vlan_enforcement = 2596 resp.tx_err_vlan_enforcement; 2597 apc->eth_stats.hc_tx_err_eth_type_enforcement = 2598 resp.tx_err_ethtype_enforcement; 2599 apc->eth_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement; 2600 apc->eth_stats.hc_tx_err_sqpdid_enforcement = 2601 resp.tx_err_SQPDID_enforcement; 2602 apc->eth_stats.hc_tx_err_cqpdid_enforcement = 2603 resp.tx_err_CQPDID_enforcement; 2604 apc->eth_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation; 2605 apc->eth_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob; 2606 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes; 2607 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2608 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2609 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2610 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2611 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2612 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2613 apc->eth_stats.hc_tx_err_gdma = resp.tx_err_gdma; 2614 } 2615 2616 static int mana_init_port(struct net_device *ndev) 2617 { 2618 struct mana_port_context *apc = netdev_priv(ndev); 2619 struct gdma_dev *gd = apc->ac->gdma_dev; 2620 u32 max_txq, max_rxq, max_queues; 2621 int port_idx = apc->port_idx; 2622 struct gdma_context *gc; 2623 char vport[32]; 2624 int err; 2625 2626 err = mana_init_port_context(apc); 2627 if (err) 2628 return err; 2629 2630 gc = gd->gdma_context; 2631 2632 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2633 &apc->indir_table_sz); 2634 if (err) { 2635 netdev_err(ndev, "Failed to query info for vPort %d\n", 2636 port_idx); 2637 goto reset_apc; 2638 } 2639 2640 max_queues = min_t(u32, max_txq, max_rxq); 2641 if (apc->max_queues > max_queues) 2642 apc->max_queues = max_queues; 2643 2644 if (apc->num_queues > apc->max_queues) 2645 apc->num_queues = apc->max_queues; 2646 2647 eth_hw_addr_set(ndev, apc->mac_addr); 2648 sprintf(vport, "vport%d", port_idx); 2649 apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs); 2650 return 0; 2651 2652 reset_apc: 2653 mana_cleanup_port_context(apc); 2654 return err; 2655 } 2656 2657 int mana_alloc_queues(struct net_device *ndev) 2658 { 2659 struct mana_port_context *apc = netdev_priv(ndev); 2660 struct gdma_dev *gd = apc->ac->gdma_dev; 2661 int err; 2662 2663 err = mana_create_vport(apc, ndev); 2664 if (err) 2665 return err; 2666 2667 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2668 if (err) 2669 goto destroy_vport; 2670 2671 err = mana_add_rx_queues(apc, ndev); 2672 if (err) 2673 goto destroy_vport; 2674 2675 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2676 2677 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2678 if (err) 2679 goto destroy_vport; 2680 2681 mana_rss_table_init(apc); 2682 2683 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2684 if (err) 2685 goto destroy_vport; 2686 2687 if (gd->gdma_context->is_pf) { 2688 err = mana_pf_register_filter(apc); 2689 if (err) 2690 goto destroy_vport; 2691 } 2692 2693 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2694 2695 return 0; 2696 2697 destroy_vport: 2698 mana_destroy_vport(apc); 2699 return err; 2700 } 2701 2702 int mana_attach(struct net_device *ndev) 2703 { 2704 struct mana_port_context *apc = netdev_priv(ndev); 2705 int err; 2706 2707 ASSERT_RTNL(); 2708 2709 err = mana_init_port(ndev); 2710 if (err) 2711 return err; 2712 2713 if (apc->port_st_save) { 2714 err = mana_alloc_queues(ndev); 2715 if (err) { 2716 mana_cleanup_port_context(apc); 2717 return err; 2718 } 2719 } 2720 2721 apc->port_is_up = apc->port_st_save; 2722 2723 /* Ensure port state updated before txq state */ 2724 smp_wmb(); 2725 2726 if (apc->port_is_up) 2727 netif_carrier_on(ndev); 2728 2729 netif_device_attach(ndev); 2730 2731 return 0; 2732 } 2733 2734 static int mana_dealloc_queues(struct net_device *ndev) 2735 { 2736 struct mana_port_context *apc = netdev_priv(ndev); 2737 unsigned long timeout = jiffies + 120 * HZ; 2738 struct gdma_dev *gd = apc->ac->gdma_dev; 2739 struct mana_txq *txq; 2740 struct sk_buff *skb; 2741 int i, err; 2742 u32 tsleep; 2743 2744 if (apc->port_is_up) 2745 return -EINVAL; 2746 2747 mana_chn_setxdp(apc, NULL); 2748 2749 if (gd->gdma_context->is_pf) 2750 mana_pf_deregister_filter(apc); 2751 2752 /* No packet can be transmitted now since apc->port_is_up is false. 2753 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2754 * a txq because it may not timely see apc->port_is_up being cleared 2755 * to false, but it doesn't matter since mana_start_xmit() drops any 2756 * new packets due to apc->port_is_up being false. 2757 * 2758 * Drain all the in-flight TX packets. 2759 * A timeout of 120 seconds for all the queues is used. 2760 * This will break the while loop when h/w is not responding. 2761 * This value of 120 has been decided here considering max 2762 * number of queues. 2763 */ 2764 2765 for (i = 0; i < apc->num_queues; i++) { 2766 txq = &apc->tx_qp[i].txq; 2767 tsleep = 1000; 2768 while (atomic_read(&txq->pending_sends) > 0 && 2769 time_before(jiffies, timeout)) { 2770 usleep_range(tsleep, tsleep + 1000); 2771 tsleep <<= 1; 2772 } 2773 if (atomic_read(&txq->pending_sends)) { 2774 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 2775 if (err) { 2776 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 2777 err, atomic_read(&txq->pending_sends), 2778 txq->gdma_txq_id); 2779 } 2780 break; 2781 } 2782 } 2783 2784 for (i = 0; i < apc->num_queues; i++) { 2785 txq = &apc->tx_qp[i].txq; 2786 while ((skb = skb_dequeue(&txq->pending_skbs))) { 2787 mana_unmap_skb(skb, apc); 2788 dev_kfree_skb_any(skb); 2789 } 2790 atomic_set(&txq->pending_sends, 0); 2791 } 2792 /* We're 100% sure the queues can no longer be woken up, because 2793 * we're sure now mana_poll_tx_cq() can't be running. 2794 */ 2795 2796 apc->rss_state = TRI_STATE_FALSE; 2797 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2798 if (err) { 2799 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2800 return err; 2801 } 2802 2803 mana_destroy_vport(apc); 2804 2805 return 0; 2806 } 2807 2808 int mana_detach(struct net_device *ndev, bool from_close) 2809 { 2810 struct mana_port_context *apc = netdev_priv(ndev); 2811 int err; 2812 2813 ASSERT_RTNL(); 2814 2815 apc->port_st_save = apc->port_is_up; 2816 apc->port_is_up = false; 2817 2818 /* Ensure port state updated before txq state */ 2819 smp_wmb(); 2820 2821 netif_tx_disable(ndev); 2822 netif_carrier_off(ndev); 2823 2824 if (apc->port_st_save) { 2825 err = mana_dealloc_queues(ndev); 2826 if (err) 2827 return err; 2828 } 2829 2830 if (!from_close) { 2831 netif_device_detach(ndev); 2832 mana_cleanup_port_context(apc); 2833 } 2834 2835 return 0; 2836 } 2837 2838 static int mana_probe_port(struct mana_context *ac, int port_idx, 2839 struct net_device **ndev_storage) 2840 { 2841 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2842 struct mana_port_context *apc; 2843 struct net_device *ndev; 2844 int err; 2845 2846 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2847 gc->max_num_queues); 2848 if (!ndev) 2849 return -ENOMEM; 2850 2851 *ndev_storage = ndev; 2852 2853 apc = netdev_priv(ndev); 2854 apc->ac = ac; 2855 apc->ndev = ndev; 2856 apc->max_queues = gc->max_num_queues; 2857 apc->num_queues = gc->max_num_queues; 2858 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE; 2859 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE; 2860 apc->port_handle = INVALID_MANA_HANDLE; 2861 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2862 apc->port_idx = port_idx; 2863 2864 mutex_init(&apc->vport_mutex); 2865 apc->vport_use_count = 0; 2866 2867 ndev->netdev_ops = &mana_devops; 2868 ndev->ethtool_ops = &mana_ethtool_ops; 2869 ndev->mtu = ETH_DATA_LEN; 2870 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2871 ndev->min_mtu = ETH_MIN_MTU; 2872 ndev->needed_headroom = MANA_HEADROOM; 2873 ndev->dev_port = port_idx; 2874 SET_NETDEV_DEV(ndev, gc->dev); 2875 2876 netif_carrier_off(ndev); 2877 2878 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2879 2880 err = mana_init_port(ndev); 2881 if (err) 2882 goto free_net; 2883 2884 err = mana_rss_table_alloc(apc); 2885 if (err) 2886 goto reset_apc; 2887 2888 netdev_lockdep_set_classes(ndev); 2889 2890 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2891 ndev->hw_features |= NETIF_F_RXCSUM; 2892 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2893 ndev->hw_features |= NETIF_F_RXHASH; 2894 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2895 NETIF_F_HW_VLAN_CTAG_RX; 2896 ndev->vlan_features = ndev->features; 2897 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 2898 NETDEV_XDP_ACT_REDIRECT | 2899 NETDEV_XDP_ACT_NDO_XMIT); 2900 2901 err = register_netdev(ndev); 2902 if (err) { 2903 netdev_err(ndev, "Unable to register netdev.\n"); 2904 goto free_indir; 2905 } 2906 2907 return 0; 2908 2909 free_indir: 2910 mana_cleanup_indir_table(apc); 2911 reset_apc: 2912 mana_cleanup_port_context(apc); 2913 free_net: 2914 *ndev_storage = NULL; 2915 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2916 free_netdev(ndev); 2917 return err; 2918 } 2919 2920 static void adev_release(struct device *dev) 2921 { 2922 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2923 2924 kfree(madev); 2925 } 2926 2927 static void remove_adev(struct gdma_dev *gd) 2928 { 2929 struct auxiliary_device *adev = gd->adev; 2930 int id = adev->id; 2931 2932 auxiliary_device_delete(adev); 2933 auxiliary_device_uninit(adev); 2934 2935 mana_adev_idx_free(id); 2936 gd->adev = NULL; 2937 } 2938 2939 static int add_adev(struct gdma_dev *gd) 2940 { 2941 struct auxiliary_device *adev; 2942 struct mana_adev *madev; 2943 int ret; 2944 2945 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2946 if (!madev) 2947 return -ENOMEM; 2948 2949 adev = &madev->adev; 2950 ret = mana_adev_idx_alloc(); 2951 if (ret < 0) 2952 goto idx_fail; 2953 adev->id = ret; 2954 2955 adev->name = "rdma"; 2956 adev->dev.parent = gd->gdma_context->dev; 2957 adev->dev.release = adev_release; 2958 madev->mdev = gd; 2959 2960 ret = auxiliary_device_init(adev); 2961 if (ret) 2962 goto init_fail; 2963 2964 /* madev is owned by the auxiliary device */ 2965 madev = NULL; 2966 ret = auxiliary_device_add(adev); 2967 if (ret) 2968 goto add_fail; 2969 2970 gd->adev = adev; 2971 return 0; 2972 2973 add_fail: 2974 auxiliary_device_uninit(adev); 2975 2976 init_fail: 2977 mana_adev_idx_free(adev->id); 2978 2979 idx_fail: 2980 kfree(madev); 2981 2982 return ret; 2983 } 2984 2985 int mana_probe(struct gdma_dev *gd, bool resuming) 2986 { 2987 struct gdma_context *gc = gd->gdma_context; 2988 struct mana_context *ac = gd->driver_data; 2989 struct device *dev = gc->dev; 2990 u16 num_ports = 0; 2991 int err; 2992 int i; 2993 2994 dev_info(dev, 2995 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2996 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2997 2998 err = mana_gd_register_device(gd); 2999 if (err) 3000 return err; 3001 3002 if (!resuming) { 3003 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 3004 if (!ac) 3005 return -ENOMEM; 3006 3007 ac->gdma_dev = gd; 3008 gd->driver_data = ac; 3009 } 3010 3011 err = mana_create_eq(ac); 3012 if (err) 3013 goto out; 3014 3015 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 3016 MANA_MICRO_VERSION, &num_ports); 3017 if (err) 3018 goto out; 3019 3020 if (!resuming) { 3021 ac->num_ports = num_ports; 3022 } else { 3023 if (ac->num_ports != num_ports) { 3024 dev_err(dev, "The number of vPorts changed: %d->%d\n", 3025 ac->num_ports, num_ports); 3026 err = -EPROTO; 3027 goto out; 3028 } 3029 } 3030 3031 if (ac->num_ports == 0) 3032 dev_err(dev, "Failed to detect any vPort\n"); 3033 3034 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 3035 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 3036 3037 if (!resuming) { 3038 for (i = 0; i < ac->num_ports; i++) { 3039 err = mana_probe_port(ac, i, &ac->ports[i]); 3040 /* we log the port for which the probe failed and stop 3041 * probes for subsequent ports. 3042 * Note that we keep running ports, for which the probes 3043 * were successful, unless add_adev fails too 3044 */ 3045 if (err) { 3046 dev_err(dev, "Probe Failed for port %d\n", i); 3047 break; 3048 } 3049 } 3050 } else { 3051 for (i = 0; i < ac->num_ports; i++) { 3052 rtnl_lock(); 3053 err = mana_attach(ac->ports[i]); 3054 rtnl_unlock(); 3055 /* we log the port for which the attach failed and stop 3056 * attach for subsequent ports 3057 * Note that we keep running ports, for which the attach 3058 * were successful, unless add_adev fails too 3059 */ 3060 if (err) { 3061 dev_err(dev, "Attach Failed for port %d\n", i); 3062 break; 3063 } 3064 } 3065 } 3066 3067 err = add_adev(gd); 3068 out: 3069 if (err) 3070 mana_remove(gd, false); 3071 3072 return err; 3073 } 3074 3075 void mana_remove(struct gdma_dev *gd, bool suspending) 3076 { 3077 struct gdma_context *gc = gd->gdma_context; 3078 struct mana_context *ac = gd->driver_data; 3079 struct mana_port_context *apc; 3080 struct device *dev = gc->dev; 3081 struct net_device *ndev; 3082 int err; 3083 int i; 3084 3085 /* adev currently doesn't support suspending, always remove it */ 3086 if (gd->adev) 3087 remove_adev(gd); 3088 3089 for (i = 0; i < ac->num_ports; i++) { 3090 ndev = ac->ports[i]; 3091 apc = netdev_priv(ndev); 3092 if (!ndev) { 3093 if (i == 0) 3094 dev_err(dev, "No net device to remove\n"); 3095 goto out; 3096 } 3097 3098 /* All cleanup actions should stay after rtnl_lock(), otherwise 3099 * other functions may access partially cleaned up data. 3100 */ 3101 rtnl_lock(); 3102 3103 err = mana_detach(ndev, false); 3104 if (err) 3105 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 3106 i, err); 3107 3108 if (suspending) { 3109 /* No need to unregister the ndev. */ 3110 rtnl_unlock(); 3111 continue; 3112 } 3113 3114 unregister_netdevice(ndev); 3115 mana_cleanup_indir_table(apc); 3116 3117 rtnl_unlock(); 3118 3119 free_netdev(ndev); 3120 } 3121 3122 mana_destroy_eq(ac); 3123 out: 3124 mana_gd_deregister_device(gd); 3125 3126 if (suspending) 3127 return; 3128 3129 gd->driver_data = NULL; 3130 gd->gdma_context = NULL; 3131 kfree(ac); 3132 } 3133 3134 struct net_device *mana_get_primary_netdev_rcu(struct mana_context *ac, u32 port_index) 3135 { 3136 struct net_device *ndev; 3137 3138 RCU_LOCKDEP_WARN(!rcu_read_lock_held(), 3139 "Taking primary netdev without holding the RCU read lock"); 3140 if (port_index >= ac->num_ports) 3141 return NULL; 3142 3143 /* When mana is used in netvsc, the upper netdevice should be returned. */ 3144 if (ac->ports[port_index]->flags & IFF_SLAVE) 3145 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]); 3146 else 3147 ndev = ac->ports[port_index]; 3148 3149 return ndev; 3150 } 3151 EXPORT_SYMBOL_NS(mana_get_primary_netdev_rcu, "NET_MANA"); 3152