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 * make sure subsequent cleanup attempts don't end up removing already 742 * cleaned dentry pointer 743 */ 744 debugfs_remove(apc->mana_port_debugfs); 745 apc->mana_port_debugfs = NULL; 746 kfree(apc->rxqs); 747 apc->rxqs = NULL; 748 } 749 750 static void mana_cleanup_indir_table(struct mana_port_context *apc) 751 { 752 apc->indir_table_sz = 0; 753 kfree(apc->indir_table); 754 kfree(apc->rxobj_table); 755 } 756 757 static int mana_init_port_context(struct mana_port_context *apc) 758 { 759 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *), 760 GFP_KERNEL); 761 762 return !apc->rxqs ? -ENOMEM : 0; 763 } 764 765 static int mana_send_request(struct mana_context *ac, void *in_buf, 766 u32 in_len, void *out_buf, u32 out_len) 767 { 768 struct gdma_context *gc = ac->gdma_dev->gdma_context; 769 struct gdma_resp_hdr *resp = out_buf; 770 struct gdma_req_hdr *req = in_buf; 771 struct device *dev = gc->dev; 772 static atomic_t activity_id; 773 int err; 774 775 req->dev_id = gc->mana.dev_id; 776 req->activity_id = atomic_inc_return(&activity_id); 777 778 err = mana_gd_send_request(gc, in_len, in_buf, out_len, 779 out_buf); 780 if (err || resp->status) { 781 dev_err(dev, "Failed to send mana message: %d, 0x%x\n", 782 err, resp->status); 783 return err ? err : -EPROTO; 784 } 785 786 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 || 787 req->activity_id != resp->activity_id) { 788 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n", 789 req->dev_id.as_uint32, resp->dev_id.as_uint32, 790 req->activity_id, resp->activity_id); 791 return -EPROTO; 792 } 793 794 return 0; 795 } 796 797 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr, 798 const enum mana_command_code expected_code, 799 const u32 min_size) 800 { 801 if (resp_hdr->response.msg_type != expected_code) 802 return -EPROTO; 803 804 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1) 805 return -EPROTO; 806 807 if (resp_hdr->response.msg_size < min_size) 808 return -EPROTO; 809 810 return 0; 811 } 812 813 static int mana_pf_register_hw_vport(struct mana_port_context *apc) 814 { 815 struct mana_register_hw_vport_resp resp = {}; 816 struct mana_register_hw_vport_req req = {}; 817 int err; 818 819 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT, 820 sizeof(req), sizeof(resp)); 821 req.attached_gfid = 1; 822 req.is_pf_default_vport = 1; 823 req.allow_all_ether_types = 1; 824 825 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 826 sizeof(resp)); 827 if (err) { 828 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err); 829 return err; 830 } 831 832 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT, 833 sizeof(resp)); 834 if (err || resp.hdr.status) { 835 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n", 836 err, resp.hdr.status); 837 return err ? err : -EPROTO; 838 } 839 840 apc->port_handle = resp.hw_vport_handle; 841 return 0; 842 } 843 844 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc) 845 { 846 struct mana_deregister_hw_vport_resp resp = {}; 847 struct mana_deregister_hw_vport_req req = {}; 848 int err; 849 850 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT, 851 sizeof(req), sizeof(resp)); 852 req.hw_vport_handle = apc->port_handle; 853 854 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 855 sizeof(resp)); 856 if (err) { 857 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n", 858 err); 859 return; 860 } 861 862 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT, 863 sizeof(resp)); 864 if (err || resp.hdr.status) 865 netdev_err(apc->ndev, 866 "Failed to deregister hw vPort: %d, 0x%x\n", 867 err, resp.hdr.status); 868 } 869 870 static int mana_pf_register_filter(struct mana_port_context *apc) 871 { 872 struct mana_register_filter_resp resp = {}; 873 struct mana_register_filter_req req = {}; 874 int err; 875 876 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER, 877 sizeof(req), sizeof(resp)); 878 req.vport = apc->port_handle; 879 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN); 880 881 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 882 sizeof(resp)); 883 if (err) { 884 netdev_err(apc->ndev, "Failed to register filter: %d\n", err); 885 return err; 886 } 887 888 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER, 889 sizeof(resp)); 890 if (err || resp.hdr.status) { 891 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n", 892 err, resp.hdr.status); 893 return err ? err : -EPROTO; 894 } 895 896 apc->pf_filter_handle = resp.filter_handle; 897 return 0; 898 } 899 900 static void mana_pf_deregister_filter(struct mana_port_context *apc) 901 { 902 struct mana_deregister_filter_resp resp = {}; 903 struct mana_deregister_filter_req req = {}; 904 int err; 905 906 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER, 907 sizeof(req), sizeof(resp)); 908 req.filter_handle = apc->pf_filter_handle; 909 910 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 911 sizeof(resp)); 912 if (err) { 913 netdev_err(apc->ndev, "Failed to unregister filter: %d\n", 914 err); 915 return; 916 } 917 918 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER, 919 sizeof(resp)); 920 if (err || resp.hdr.status) 921 netdev_err(apc->ndev, 922 "Failed to deregister filter: %d, 0x%x\n", 923 err, resp.hdr.status); 924 } 925 926 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver, 927 u32 proto_minor_ver, u32 proto_micro_ver, 928 u16 *max_num_vports) 929 { 930 struct gdma_context *gc = ac->gdma_dev->gdma_context; 931 struct mana_query_device_cfg_resp resp = {}; 932 struct mana_query_device_cfg_req req = {}; 933 struct device *dev = gc->dev; 934 int err = 0; 935 936 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG, 937 sizeof(req), sizeof(resp)); 938 939 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 940 941 req.proto_major_ver = proto_major_ver; 942 req.proto_minor_ver = proto_minor_ver; 943 req.proto_micro_ver = proto_micro_ver; 944 945 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp)); 946 if (err) { 947 dev_err(dev, "Failed to query config: %d", err); 948 return err; 949 } 950 951 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG, 952 sizeof(resp)); 953 if (err || resp.hdr.status) { 954 dev_err(dev, "Invalid query result: %d, 0x%x\n", err, 955 resp.hdr.status); 956 if (!err) 957 err = -EPROTO; 958 return err; 959 } 960 961 *max_num_vports = resp.max_num_vports; 962 963 if (resp.hdr.response.msg_version == GDMA_MESSAGE_V2) 964 gc->adapter_mtu = resp.adapter_mtu; 965 else 966 gc->adapter_mtu = ETH_FRAME_LEN; 967 968 debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc->adapter_mtu); 969 970 return 0; 971 } 972 973 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index, 974 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry) 975 { 976 struct mana_query_vport_cfg_resp resp = {}; 977 struct mana_query_vport_cfg_req req = {}; 978 int err; 979 980 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG, 981 sizeof(req), sizeof(resp)); 982 983 req.vport_index = vport_index; 984 985 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 986 sizeof(resp)); 987 if (err) 988 return err; 989 990 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG, 991 sizeof(resp)); 992 if (err) 993 return err; 994 995 if (resp.hdr.status) 996 return -EPROTO; 997 998 *max_sq = resp.max_num_sq; 999 *max_rq = resp.max_num_rq; 1000 if (resp.num_indirection_ent > 0 && 1001 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE && 1002 is_power_of_2(resp.num_indirection_ent)) { 1003 *num_indir_entry = resp.num_indirection_ent; 1004 } else { 1005 netdev_warn(apc->ndev, 1006 "Setting indirection table size to default %d for vPort %d\n", 1007 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx); 1008 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE; 1009 } 1010 1011 apc->port_handle = resp.vport; 1012 ether_addr_copy(apc->mac_addr, resp.mac_addr); 1013 1014 return 0; 1015 } 1016 1017 void mana_uncfg_vport(struct mana_port_context *apc) 1018 { 1019 mutex_lock(&apc->vport_mutex); 1020 apc->vport_use_count--; 1021 WARN_ON(apc->vport_use_count < 0); 1022 mutex_unlock(&apc->vport_mutex); 1023 } 1024 EXPORT_SYMBOL_NS(mana_uncfg_vport, "NET_MANA"); 1025 1026 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id, 1027 u32 doorbell_pg_id) 1028 { 1029 struct mana_config_vport_resp resp = {}; 1030 struct mana_config_vport_req req = {}; 1031 int err; 1032 1033 /* This function is used to program the Ethernet port in the hardware 1034 * table. It can be called from the Ethernet driver or the RDMA driver. 1035 * 1036 * For Ethernet usage, the hardware supports only one active user on a 1037 * physical port. The driver checks on the port usage before programming 1038 * the hardware when creating the RAW QP (RDMA driver) or exposing the 1039 * device to kernel NET layer (Ethernet driver). 1040 * 1041 * Because the RDMA driver doesn't know in advance which QP type the 1042 * user will create, it exposes the device with all its ports. The user 1043 * may not be able to create RAW QP on a port if this port is already 1044 * in used by the Ethernet driver from the kernel. 1045 * 1046 * This physical port limitation only applies to the RAW QP. For RC QP, 1047 * the hardware doesn't have this limitation. The user can create RC 1048 * QPs on a physical port up to the hardware limits independent of the 1049 * Ethernet usage on the same port. 1050 */ 1051 mutex_lock(&apc->vport_mutex); 1052 if (apc->vport_use_count > 0) { 1053 mutex_unlock(&apc->vport_mutex); 1054 return -EBUSY; 1055 } 1056 apc->vport_use_count++; 1057 mutex_unlock(&apc->vport_mutex); 1058 1059 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX, 1060 sizeof(req), sizeof(resp)); 1061 req.vport = apc->port_handle; 1062 req.pdid = protection_dom_id; 1063 req.doorbell_pageid = doorbell_pg_id; 1064 1065 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1066 sizeof(resp)); 1067 if (err) { 1068 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err); 1069 goto out; 1070 } 1071 1072 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX, 1073 sizeof(resp)); 1074 if (err || resp.hdr.status) { 1075 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n", 1076 err, resp.hdr.status); 1077 if (!err) 1078 err = -EPROTO; 1079 1080 goto out; 1081 } 1082 1083 apc->tx_shortform_allowed = resp.short_form_allowed; 1084 apc->tx_vp_offset = resp.tx_vport_offset; 1085 1086 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n", 1087 apc->port_handle, protection_dom_id, doorbell_pg_id); 1088 out: 1089 if (err) 1090 mana_uncfg_vport(apc); 1091 1092 return err; 1093 } 1094 EXPORT_SYMBOL_NS(mana_cfg_vport, "NET_MANA"); 1095 1096 static int mana_cfg_vport_steering(struct mana_port_context *apc, 1097 enum TRI_STATE rx, 1098 bool update_default_rxobj, bool update_key, 1099 bool update_tab) 1100 { 1101 struct mana_cfg_rx_steer_req_v2 *req; 1102 struct mana_cfg_rx_steer_resp resp = {}; 1103 struct net_device *ndev = apc->ndev; 1104 u32 req_buf_size; 1105 int err; 1106 1107 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz); 1108 req = kzalloc(req_buf_size, GFP_KERNEL); 1109 if (!req) 1110 return -ENOMEM; 1111 1112 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size, 1113 sizeof(resp)); 1114 1115 req->hdr.req.msg_version = GDMA_MESSAGE_V2; 1116 1117 req->vport = apc->port_handle; 1118 req->num_indir_entries = apc->indir_table_sz; 1119 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, 1120 indir_tab); 1121 req->rx_enable = rx; 1122 req->rss_enable = apc->rss_state; 1123 req->update_default_rxobj = update_default_rxobj; 1124 req->update_hashkey = update_key; 1125 req->update_indir_tab = update_tab; 1126 req->default_rxobj = apc->default_rxobj; 1127 req->cqe_coalescing_enable = 0; 1128 1129 if (update_key) 1130 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); 1131 1132 if (update_tab) 1133 memcpy(req->indir_tab, apc->rxobj_table, 1134 flex_array_size(req, indir_tab, req->num_indir_entries)); 1135 1136 err = mana_send_request(apc->ac, req, req_buf_size, &resp, 1137 sizeof(resp)); 1138 if (err) { 1139 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err); 1140 goto out; 1141 } 1142 1143 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX, 1144 sizeof(resp)); 1145 if (err) { 1146 netdev_err(ndev, "vPort RX configuration failed: %d\n", err); 1147 goto out; 1148 } 1149 1150 if (resp.hdr.status) { 1151 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n", 1152 resp.hdr.status); 1153 err = -EPROTO; 1154 } 1155 1156 netdev_info(ndev, "Configured steering vPort %llu entries %u\n", 1157 apc->port_handle, apc->indir_table_sz); 1158 out: 1159 kfree(req); 1160 return err; 1161 } 1162 1163 int mana_create_wq_obj(struct mana_port_context *apc, 1164 mana_handle_t vport, 1165 u32 wq_type, struct mana_obj_spec *wq_spec, 1166 struct mana_obj_spec *cq_spec, 1167 mana_handle_t *wq_obj) 1168 { 1169 struct mana_create_wqobj_resp resp = {}; 1170 struct mana_create_wqobj_req req = {}; 1171 struct net_device *ndev = apc->ndev; 1172 int err; 1173 1174 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ, 1175 sizeof(req), sizeof(resp)); 1176 req.vport = vport; 1177 req.wq_type = wq_type; 1178 req.wq_gdma_region = wq_spec->gdma_region; 1179 req.cq_gdma_region = cq_spec->gdma_region; 1180 req.wq_size = wq_spec->queue_size; 1181 req.cq_size = cq_spec->queue_size; 1182 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id; 1183 req.cq_parent_qid = cq_spec->attached_eq; 1184 1185 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1186 sizeof(resp)); 1187 if (err) { 1188 netdev_err(ndev, "Failed to create WQ object: %d\n", err); 1189 goto out; 1190 } 1191 1192 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ, 1193 sizeof(resp)); 1194 if (err || resp.hdr.status) { 1195 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err, 1196 resp.hdr.status); 1197 if (!err) 1198 err = -EPROTO; 1199 goto out; 1200 } 1201 1202 if (resp.wq_obj == INVALID_MANA_HANDLE) { 1203 netdev_err(ndev, "Got an invalid WQ object handle\n"); 1204 err = -EPROTO; 1205 goto out; 1206 } 1207 1208 *wq_obj = resp.wq_obj; 1209 wq_spec->queue_index = resp.wq_id; 1210 cq_spec->queue_index = resp.cq_id; 1211 1212 return 0; 1213 out: 1214 return err; 1215 } 1216 EXPORT_SYMBOL_NS(mana_create_wq_obj, "NET_MANA"); 1217 1218 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type, 1219 mana_handle_t wq_obj) 1220 { 1221 struct mana_destroy_wqobj_resp resp = {}; 1222 struct mana_destroy_wqobj_req req = {}; 1223 struct net_device *ndev = apc->ndev; 1224 int err; 1225 1226 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ, 1227 sizeof(req), sizeof(resp)); 1228 req.wq_type = wq_type; 1229 req.wq_obj_handle = wq_obj; 1230 1231 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 1232 sizeof(resp)); 1233 if (err) { 1234 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err); 1235 return; 1236 } 1237 1238 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ, 1239 sizeof(resp)); 1240 if (err || resp.hdr.status) 1241 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err, 1242 resp.hdr.status); 1243 } 1244 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, "NET_MANA"); 1245 1246 static void mana_destroy_eq(struct mana_context *ac) 1247 { 1248 struct gdma_context *gc = ac->gdma_dev->gdma_context; 1249 struct gdma_queue *eq; 1250 int i; 1251 1252 if (!ac->eqs) 1253 return; 1254 1255 debugfs_remove_recursive(ac->mana_eqs_debugfs); 1256 ac->mana_eqs_debugfs = NULL; 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 apc->tx_qp[i].mana_tx_debugfs = NULL; 1918 1919 napi = &apc->tx_qp[i].tx_cq.napi; 1920 if (apc->tx_qp[i].txq.napi_initialized) { 1921 napi_synchronize(napi); 1922 napi_disable(napi); 1923 netif_napi_del(napi); 1924 apc->tx_qp[i].txq.napi_initialized = false; 1925 } 1926 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object); 1927 1928 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq); 1929 1930 mana_deinit_txq(apc, &apc->tx_qp[i].txq); 1931 } 1932 1933 kfree(apc->tx_qp); 1934 apc->tx_qp = NULL; 1935 } 1936 1937 static void mana_create_txq_debugfs(struct mana_port_context *apc, int idx) 1938 { 1939 struct mana_tx_qp *tx_qp = &apc->tx_qp[idx]; 1940 char qnum[32]; 1941 1942 sprintf(qnum, "TX-%d", idx); 1943 tx_qp->mana_tx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 1944 debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs, 1945 &tx_qp->txq.gdma_sq->head); 1946 debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs, 1947 &tx_qp->txq.gdma_sq->tail); 1948 debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debugfs, 1949 &tx_qp->txq.pending_skbs.qlen); 1950 debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs, 1951 &tx_qp->tx_cq.gdma_cq->head); 1952 debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs, 1953 &tx_qp->tx_cq.gdma_cq->tail); 1954 debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs, 1955 &tx_qp->tx_cq.budget); 1956 debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs, 1957 tx_qp->txq.gdma_sq, &mana_dbg_q_fops); 1958 debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs, 1959 tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops); 1960 } 1961 1962 static int mana_create_txq(struct mana_port_context *apc, 1963 struct net_device *net) 1964 { 1965 struct mana_context *ac = apc->ac; 1966 struct gdma_dev *gd = ac->gdma_dev; 1967 struct mana_obj_spec wq_spec; 1968 struct mana_obj_spec cq_spec; 1969 struct gdma_queue_spec spec; 1970 struct gdma_context *gc; 1971 struct mana_txq *txq; 1972 struct mana_cq *cq; 1973 u32 txq_size; 1974 u32 cq_size; 1975 int err; 1976 int i; 1977 1978 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp), 1979 GFP_KERNEL); 1980 if (!apc->tx_qp) 1981 return -ENOMEM; 1982 1983 /* The minimum size of the WQE is 32 bytes, hence 1984 * apc->tx_queue_size represents the maximum number of WQEs 1985 * the SQ can store. This value is then used to size other queues 1986 * to prevent overflow. 1987 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED, 1988 * as min val of apc->tx_queue_size is 128 and that would make 1989 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size 1990 * are always power of two 1991 */ 1992 txq_size = apc->tx_queue_size * 32; 1993 1994 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE; 1995 1996 gc = gd->gdma_context; 1997 1998 for (i = 0; i < apc->num_queues; i++) { 1999 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE; 2000 2001 /* Create SQ */ 2002 txq = &apc->tx_qp[i].txq; 2003 2004 u64_stats_init(&txq->stats.syncp); 2005 txq->ndev = net; 2006 txq->net_txq = netdev_get_tx_queue(net, i); 2007 txq->vp_offset = apc->tx_vp_offset; 2008 txq->napi_initialized = false; 2009 skb_queue_head_init(&txq->pending_skbs); 2010 2011 memset(&spec, 0, sizeof(spec)); 2012 spec.type = GDMA_SQ; 2013 spec.monitor_avl_buf = true; 2014 spec.queue_size = txq_size; 2015 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq); 2016 if (err) 2017 goto out; 2018 2019 /* Create SQ's CQ */ 2020 cq = &apc->tx_qp[i].tx_cq; 2021 cq->type = MANA_CQ_TYPE_TX; 2022 2023 cq->txq = txq; 2024 2025 memset(&spec, 0, sizeof(spec)); 2026 spec.type = GDMA_CQ; 2027 spec.monitor_avl_buf = false; 2028 spec.queue_size = cq_size; 2029 spec.cq.callback = mana_schedule_napi; 2030 spec.cq.parent_eq = ac->eqs[i].eq; 2031 spec.cq.context = cq; 2032 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2033 if (err) 2034 goto out; 2035 2036 memset(&wq_spec, 0, sizeof(wq_spec)); 2037 memset(&cq_spec, 0, sizeof(cq_spec)); 2038 2039 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle; 2040 wq_spec.queue_size = txq->gdma_sq->queue_size; 2041 2042 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2043 cq_spec.queue_size = cq->gdma_cq->queue_size; 2044 cq_spec.modr_ctx_id = 0; 2045 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2046 2047 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ, 2048 &wq_spec, &cq_spec, 2049 &apc->tx_qp[i].tx_object); 2050 2051 if (err) 2052 goto out; 2053 2054 txq->gdma_sq->id = wq_spec.queue_index; 2055 cq->gdma_cq->id = cq_spec.queue_index; 2056 2057 txq->gdma_sq->mem_info.dma_region_handle = 2058 GDMA_INVALID_DMA_REGION; 2059 cq->gdma_cq->mem_info.dma_region_handle = 2060 GDMA_INVALID_DMA_REGION; 2061 2062 txq->gdma_txq_id = txq->gdma_sq->id; 2063 2064 cq->gdma_id = cq->gdma_cq->id; 2065 2066 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2067 err = -EINVAL; 2068 goto out; 2069 } 2070 2071 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2072 2073 mana_create_txq_debugfs(apc, i); 2074 2075 netif_napi_add_tx(net, &cq->napi, mana_poll); 2076 napi_enable(&cq->napi); 2077 txq->napi_initialized = true; 2078 2079 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2080 } 2081 2082 return 0; 2083 out: 2084 mana_destroy_txq(apc); 2085 return err; 2086 } 2087 2088 static void mana_destroy_rxq(struct mana_port_context *apc, 2089 struct mana_rxq *rxq, bool napi_initialized) 2090 2091 { 2092 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2093 struct mana_recv_buf_oob *rx_oob; 2094 struct device *dev = gc->dev; 2095 struct napi_struct *napi; 2096 struct page *page; 2097 int i; 2098 2099 if (!rxq) 2100 return; 2101 2102 debugfs_remove_recursive(rxq->mana_rx_debugfs); 2103 rxq->mana_rx_debugfs = NULL; 2104 2105 napi = &rxq->rx_cq.napi; 2106 2107 if (napi_initialized) { 2108 napi_synchronize(napi); 2109 2110 napi_disable(napi); 2111 2112 netif_napi_del(napi); 2113 } 2114 xdp_rxq_info_unreg(&rxq->xdp_rxq); 2115 2116 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj); 2117 2118 mana_deinit_cq(apc, &rxq->rx_cq); 2119 2120 if (rxq->xdp_save_va) 2121 put_page(virt_to_head_page(rxq->xdp_save_va)); 2122 2123 for (i = 0; i < rxq->num_rx_buf; i++) { 2124 rx_oob = &rxq->rx_oobs[i]; 2125 2126 if (!rx_oob->buf_va) 2127 continue; 2128 2129 dma_unmap_single(dev, rx_oob->sgl[0].address, 2130 rx_oob->sgl[0].size, DMA_FROM_DEVICE); 2131 2132 page = virt_to_head_page(rx_oob->buf_va); 2133 2134 if (rx_oob->from_pool) 2135 page_pool_put_full_page(rxq->page_pool, page, false); 2136 else 2137 put_page(page); 2138 2139 rx_oob->buf_va = NULL; 2140 } 2141 2142 page_pool_destroy(rxq->page_pool); 2143 2144 if (rxq->gdma_rq) 2145 mana_gd_destroy_queue(gc, rxq->gdma_rq); 2146 2147 kfree(rxq); 2148 } 2149 2150 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key, 2151 struct mana_rxq *rxq, struct device *dev) 2152 { 2153 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2154 bool from_pool = false; 2155 dma_addr_t da; 2156 void *va; 2157 2158 if (mpc->rxbufs_pre) 2159 va = mana_get_rxbuf_pre(rxq, &da); 2160 else 2161 va = mana_get_rxfrag(rxq, dev, &da, &from_pool, false); 2162 2163 if (!va) 2164 return -ENOMEM; 2165 2166 rx_oob->buf_va = va; 2167 rx_oob->from_pool = from_pool; 2168 2169 rx_oob->sgl[0].address = da; 2170 rx_oob->sgl[0].size = rxq->datasize; 2171 rx_oob->sgl[0].mem_key = mem_key; 2172 2173 return 0; 2174 } 2175 2176 #define MANA_WQE_HEADER_SIZE 16 2177 #define MANA_WQE_SGE_SIZE 16 2178 2179 static int mana_alloc_rx_wqe(struct mana_port_context *apc, 2180 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size) 2181 { 2182 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context; 2183 struct mana_recv_buf_oob *rx_oob; 2184 struct device *dev = gc->dev; 2185 u32 buf_idx; 2186 int ret; 2187 2188 WARN_ON(rxq->datasize == 0); 2189 2190 *rxq_size = 0; 2191 *cq_size = 0; 2192 2193 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2194 rx_oob = &rxq->rx_oobs[buf_idx]; 2195 memset(rx_oob, 0, sizeof(*rx_oob)); 2196 2197 rx_oob->num_sge = 1; 2198 2199 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq, 2200 dev); 2201 if (ret) 2202 return ret; 2203 2204 rx_oob->wqe_req.sgl = rx_oob->sgl; 2205 rx_oob->wqe_req.num_sge = rx_oob->num_sge; 2206 rx_oob->wqe_req.inline_oob_size = 0; 2207 rx_oob->wqe_req.inline_oob_data = NULL; 2208 rx_oob->wqe_req.flags = 0; 2209 rx_oob->wqe_req.client_data_unit = 0; 2210 2211 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE + 2212 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32); 2213 *cq_size += COMP_ENTRY_SIZE; 2214 } 2215 2216 return 0; 2217 } 2218 2219 static int mana_push_wqe(struct mana_rxq *rxq) 2220 { 2221 struct mana_recv_buf_oob *rx_oob; 2222 u32 buf_idx; 2223 int err; 2224 2225 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) { 2226 rx_oob = &rxq->rx_oobs[buf_idx]; 2227 2228 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req, 2229 &rx_oob->wqe_inf); 2230 if (err) 2231 return -ENOSPC; 2232 } 2233 2234 return 0; 2235 } 2236 2237 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc) 2238 { 2239 struct mana_port_context *mpc = netdev_priv(rxq->ndev); 2240 struct page_pool_params pprm = {}; 2241 int ret; 2242 2243 pprm.pool_size = mpc->rx_queue_size; 2244 pprm.nid = gc->numa_node; 2245 pprm.napi = &rxq->rx_cq.napi; 2246 pprm.netdev = rxq->ndev; 2247 2248 rxq->page_pool = page_pool_create(&pprm); 2249 2250 if (IS_ERR(rxq->page_pool)) { 2251 ret = PTR_ERR(rxq->page_pool); 2252 rxq->page_pool = NULL; 2253 return ret; 2254 } 2255 2256 return 0; 2257 } 2258 2259 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc, 2260 u32 rxq_idx, struct mana_eq *eq, 2261 struct net_device *ndev) 2262 { 2263 struct gdma_dev *gd = apc->ac->gdma_dev; 2264 struct mana_obj_spec wq_spec; 2265 struct mana_obj_spec cq_spec; 2266 struct gdma_queue_spec spec; 2267 struct mana_cq *cq = NULL; 2268 struct gdma_context *gc; 2269 u32 cq_size, rq_size; 2270 struct mana_rxq *rxq; 2271 int err; 2272 2273 gc = gd->gdma_context; 2274 2275 rxq = kzalloc(struct_size(rxq, rx_oobs, apc->rx_queue_size), 2276 GFP_KERNEL); 2277 if (!rxq) 2278 return NULL; 2279 2280 rxq->ndev = ndev; 2281 rxq->num_rx_buf = apc->rx_queue_size; 2282 rxq->rxq_idx = rxq_idx; 2283 rxq->rxobj = INVALID_MANA_HANDLE; 2284 2285 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size, 2286 &rxq->headroom); 2287 2288 /* Create page pool for RX queue */ 2289 err = mana_create_page_pool(rxq, gc); 2290 if (err) { 2291 netdev_err(ndev, "Create page pool err:%d\n", err); 2292 goto out; 2293 } 2294 2295 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size); 2296 if (err) 2297 goto out; 2298 2299 rq_size = MANA_PAGE_ALIGN(rq_size); 2300 cq_size = MANA_PAGE_ALIGN(cq_size); 2301 2302 /* Create RQ */ 2303 memset(&spec, 0, sizeof(spec)); 2304 spec.type = GDMA_RQ; 2305 spec.monitor_avl_buf = true; 2306 spec.queue_size = rq_size; 2307 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq); 2308 if (err) 2309 goto out; 2310 2311 /* Create RQ's CQ */ 2312 cq = &rxq->rx_cq; 2313 cq->type = MANA_CQ_TYPE_RX; 2314 cq->rxq = rxq; 2315 2316 memset(&spec, 0, sizeof(spec)); 2317 spec.type = GDMA_CQ; 2318 spec.monitor_avl_buf = false; 2319 spec.queue_size = cq_size; 2320 spec.cq.callback = mana_schedule_napi; 2321 spec.cq.parent_eq = eq->eq; 2322 spec.cq.context = cq; 2323 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq); 2324 if (err) 2325 goto out; 2326 2327 memset(&wq_spec, 0, sizeof(wq_spec)); 2328 memset(&cq_spec, 0, sizeof(cq_spec)); 2329 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle; 2330 wq_spec.queue_size = rxq->gdma_rq->queue_size; 2331 2332 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle; 2333 cq_spec.queue_size = cq->gdma_cq->queue_size; 2334 cq_spec.modr_ctx_id = 0; 2335 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id; 2336 2337 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ, 2338 &wq_spec, &cq_spec, &rxq->rxobj); 2339 if (err) 2340 goto out; 2341 2342 rxq->gdma_rq->id = wq_spec.queue_index; 2343 cq->gdma_cq->id = cq_spec.queue_index; 2344 2345 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2346 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION; 2347 2348 rxq->gdma_id = rxq->gdma_rq->id; 2349 cq->gdma_id = cq->gdma_cq->id; 2350 2351 err = mana_push_wqe(rxq); 2352 if (err) 2353 goto out; 2354 2355 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) { 2356 err = -EINVAL; 2357 goto out; 2358 } 2359 2360 gc->cq_table[cq->gdma_id] = cq->gdma_cq; 2361 2362 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1); 2363 2364 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx, 2365 cq->napi.napi_id)); 2366 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 2367 rxq->page_pool)); 2368 2369 napi_enable(&cq->napi); 2370 2371 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT); 2372 out: 2373 if (!err) 2374 return rxq; 2375 2376 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err); 2377 2378 mana_destroy_rxq(apc, rxq, false); 2379 2380 if (cq) 2381 mana_deinit_cq(apc, cq); 2382 2383 return NULL; 2384 } 2385 2386 static void mana_create_rxq_debugfs(struct mana_port_context *apc, int idx) 2387 { 2388 struct mana_rxq *rxq; 2389 char qnum[32]; 2390 2391 rxq = apc->rxqs[idx]; 2392 2393 sprintf(qnum, "RX-%d", idx); 2394 rxq->mana_rx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs); 2395 debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->head); 2396 debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->tail); 2397 debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->num_rx_buf); 2398 debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs, 2399 &rxq->rx_cq.gdma_cq->head); 2400 debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs, 2401 &rxq->rx_cq.gdma_cq->tail); 2402 debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq->rx_cq.budget); 2403 debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->gdma_rq, &mana_dbg_q_fops); 2404 debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->rx_cq.gdma_cq, 2405 &mana_dbg_q_fops); 2406 } 2407 2408 static int mana_add_rx_queues(struct mana_port_context *apc, 2409 struct net_device *ndev) 2410 { 2411 struct mana_context *ac = apc->ac; 2412 struct mana_rxq *rxq; 2413 int err = 0; 2414 int i; 2415 2416 for (i = 0; i < apc->num_queues; i++) { 2417 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev); 2418 if (!rxq) { 2419 err = -ENOMEM; 2420 goto out; 2421 } 2422 2423 u64_stats_init(&rxq->stats.syncp); 2424 2425 apc->rxqs[i] = rxq; 2426 2427 mana_create_rxq_debugfs(apc, i); 2428 } 2429 2430 apc->default_rxobj = apc->rxqs[0]->rxobj; 2431 out: 2432 return err; 2433 } 2434 2435 static void mana_destroy_vport(struct mana_port_context *apc) 2436 { 2437 struct gdma_dev *gd = apc->ac->gdma_dev; 2438 struct mana_rxq *rxq; 2439 u32 rxq_idx; 2440 2441 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) { 2442 rxq = apc->rxqs[rxq_idx]; 2443 if (!rxq) 2444 continue; 2445 2446 mana_destroy_rxq(apc, rxq, true); 2447 apc->rxqs[rxq_idx] = NULL; 2448 } 2449 2450 mana_destroy_txq(apc); 2451 mana_uncfg_vport(apc); 2452 2453 if (gd->gdma_context->is_pf) 2454 mana_pf_deregister_hw_vport(apc); 2455 } 2456 2457 static int mana_create_vport(struct mana_port_context *apc, 2458 struct net_device *net) 2459 { 2460 struct gdma_dev *gd = apc->ac->gdma_dev; 2461 int err; 2462 2463 apc->default_rxobj = INVALID_MANA_HANDLE; 2464 2465 if (gd->gdma_context->is_pf) { 2466 err = mana_pf_register_hw_vport(apc); 2467 if (err) 2468 return err; 2469 } 2470 2471 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell); 2472 if (err) 2473 return err; 2474 2475 return mana_create_txq(apc, net); 2476 } 2477 2478 static int mana_rss_table_alloc(struct mana_port_context *apc) 2479 { 2480 if (!apc->indir_table_sz) { 2481 netdev_err(apc->ndev, 2482 "Indirection table size not set for vPort %d\n", 2483 apc->port_idx); 2484 return -EINVAL; 2485 } 2486 2487 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL); 2488 if (!apc->indir_table) 2489 return -ENOMEM; 2490 2491 apc->rxobj_table = kcalloc(apc->indir_table_sz, sizeof(mana_handle_t), GFP_KERNEL); 2492 if (!apc->rxobj_table) { 2493 kfree(apc->indir_table); 2494 return -ENOMEM; 2495 } 2496 2497 return 0; 2498 } 2499 2500 static void mana_rss_table_init(struct mana_port_context *apc) 2501 { 2502 int i; 2503 2504 for (i = 0; i < apc->indir_table_sz; i++) 2505 apc->indir_table[i] = 2506 ethtool_rxfh_indir_default(i, apc->num_queues); 2507 } 2508 2509 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx, 2510 bool update_hash, bool update_tab) 2511 { 2512 u32 queue_idx; 2513 int err; 2514 int i; 2515 2516 if (update_tab) { 2517 for (i = 0; i < apc->indir_table_sz; i++) { 2518 queue_idx = apc->indir_table[i]; 2519 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj; 2520 } 2521 } 2522 2523 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab); 2524 if (err) 2525 return err; 2526 2527 mana_fence_rqs(apc); 2528 2529 return 0; 2530 } 2531 2532 void mana_query_gf_stats(struct mana_port_context *apc) 2533 { 2534 struct mana_query_gf_stat_resp resp = {}; 2535 struct mana_query_gf_stat_req req = {}; 2536 struct net_device *ndev = apc->ndev; 2537 int err; 2538 2539 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT, 2540 sizeof(req), sizeof(resp)); 2541 req.hdr.resp.msg_version = GDMA_MESSAGE_V2; 2542 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE | 2543 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED | 2544 STATISTICS_FLAGS_HC_RX_BYTES | 2545 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS | 2546 STATISTICS_FLAGS_HC_RX_UCAST_BYTES | 2547 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS | 2548 STATISTICS_FLAGS_HC_RX_MCAST_BYTES | 2549 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS | 2550 STATISTICS_FLAGS_HC_RX_BCAST_BYTES | 2551 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED | 2552 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED | 2553 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS | 2554 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT | 2555 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT | 2556 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT | 2557 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT | 2558 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT | 2559 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION | 2560 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB | 2561 STATISTICS_FLAGS_HC_TX_BYTES | 2562 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS | 2563 STATISTICS_FLAGS_HC_TX_UCAST_BYTES | 2564 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS | 2565 STATISTICS_FLAGS_HC_TX_MCAST_BYTES | 2566 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS | 2567 STATISTICS_FLAGS_HC_TX_BCAST_BYTES | 2568 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR; 2569 2570 err = mana_send_request(apc->ac, &req, sizeof(req), &resp, 2571 sizeof(resp)); 2572 if (err) { 2573 netdev_err(ndev, "Failed to query GF stats: %d\n", err); 2574 return; 2575 } 2576 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT, 2577 sizeof(resp)); 2578 if (err || resp.hdr.status) { 2579 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err, 2580 resp.hdr.status); 2581 return; 2582 } 2583 2584 apc->eth_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe; 2585 apc->eth_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled; 2586 apc->eth_stats.hc_rx_bytes = resp.hc_rx_bytes; 2587 apc->eth_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts; 2588 apc->eth_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes; 2589 apc->eth_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts; 2590 apc->eth_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes; 2591 apc->eth_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts; 2592 apc->eth_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes; 2593 apc->eth_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled; 2594 apc->eth_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled; 2595 apc->eth_stats.hc_tx_err_inval_vportoffset_pkt = 2596 resp.tx_err_inval_vport_offset_pkt; 2597 apc->eth_stats.hc_tx_err_vlan_enforcement = 2598 resp.tx_err_vlan_enforcement; 2599 apc->eth_stats.hc_tx_err_eth_type_enforcement = 2600 resp.tx_err_ethtype_enforcement; 2601 apc->eth_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement; 2602 apc->eth_stats.hc_tx_err_sqpdid_enforcement = 2603 resp.tx_err_SQPDID_enforcement; 2604 apc->eth_stats.hc_tx_err_cqpdid_enforcement = 2605 resp.tx_err_CQPDID_enforcement; 2606 apc->eth_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation; 2607 apc->eth_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob; 2608 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes; 2609 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts; 2610 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes; 2611 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts; 2612 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes; 2613 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts; 2614 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes; 2615 apc->eth_stats.hc_tx_err_gdma = resp.tx_err_gdma; 2616 } 2617 2618 static int mana_init_port(struct net_device *ndev) 2619 { 2620 struct mana_port_context *apc = netdev_priv(ndev); 2621 struct gdma_dev *gd = apc->ac->gdma_dev; 2622 u32 max_txq, max_rxq, max_queues; 2623 int port_idx = apc->port_idx; 2624 struct gdma_context *gc; 2625 char vport[32]; 2626 int err; 2627 2628 err = mana_init_port_context(apc); 2629 if (err) 2630 return err; 2631 2632 gc = gd->gdma_context; 2633 2634 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, 2635 &apc->indir_table_sz); 2636 if (err) { 2637 netdev_err(ndev, "Failed to query info for vPort %d\n", 2638 port_idx); 2639 goto reset_apc; 2640 } 2641 2642 max_queues = min_t(u32, max_txq, max_rxq); 2643 if (apc->max_queues > max_queues) 2644 apc->max_queues = max_queues; 2645 2646 if (apc->num_queues > apc->max_queues) 2647 apc->num_queues = apc->max_queues; 2648 2649 eth_hw_addr_set(ndev, apc->mac_addr); 2650 sprintf(vport, "vport%d", port_idx); 2651 apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs); 2652 return 0; 2653 2654 reset_apc: 2655 mana_cleanup_port_context(apc); 2656 return err; 2657 } 2658 2659 int mana_alloc_queues(struct net_device *ndev) 2660 { 2661 struct mana_port_context *apc = netdev_priv(ndev); 2662 struct gdma_dev *gd = apc->ac->gdma_dev; 2663 int err; 2664 2665 err = mana_create_vport(apc, ndev); 2666 if (err) 2667 return err; 2668 2669 err = netif_set_real_num_tx_queues(ndev, apc->num_queues); 2670 if (err) 2671 goto destroy_vport; 2672 2673 err = mana_add_rx_queues(apc, ndev); 2674 if (err) 2675 goto destroy_vport; 2676 2677 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE; 2678 2679 err = netif_set_real_num_rx_queues(ndev, apc->num_queues); 2680 if (err) 2681 goto destroy_vport; 2682 2683 mana_rss_table_init(apc); 2684 2685 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true); 2686 if (err) 2687 goto destroy_vport; 2688 2689 if (gd->gdma_context->is_pf) { 2690 err = mana_pf_register_filter(apc); 2691 if (err) 2692 goto destroy_vport; 2693 } 2694 2695 mana_chn_setxdp(apc, mana_xdp_get(apc)); 2696 2697 return 0; 2698 2699 destroy_vport: 2700 mana_destroy_vport(apc); 2701 return err; 2702 } 2703 2704 int mana_attach(struct net_device *ndev) 2705 { 2706 struct mana_port_context *apc = netdev_priv(ndev); 2707 int err; 2708 2709 ASSERT_RTNL(); 2710 2711 err = mana_init_port(ndev); 2712 if (err) 2713 return err; 2714 2715 if (apc->port_st_save) { 2716 err = mana_alloc_queues(ndev); 2717 if (err) { 2718 mana_cleanup_port_context(apc); 2719 return err; 2720 } 2721 } 2722 2723 apc->port_is_up = apc->port_st_save; 2724 2725 /* Ensure port state updated before txq state */ 2726 smp_wmb(); 2727 2728 if (apc->port_is_up) 2729 netif_carrier_on(ndev); 2730 2731 netif_device_attach(ndev); 2732 2733 return 0; 2734 } 2735 2736 static int mana_dealloc_queues(struct net_device *ndev) 2737 { 2738 struct mana_port_context *apc = netdev_priv(ndev); 2739 unsigned long timeout = jiffies + 120 * HZ; 2740 struct gdma_dev *gd = apc->ac->gdma_dev; 2741 struct mana_txq *txq; 2742 struct sk_buff *skb; 2743 int i, err; 2744 u32 tsleep; 2745 2746 if (apc->port_is_up) 2747 return -EINVAL; 2748 2749 mana_chn_setxdp(apc, NULL); 2750 2751 if (gd->gdma_context->is_pf) 2752 mana_pf_deregister_filter(apc); 2753 2754 /* No packet can be transmitted now since apc->port_is_up is false. 2755 * There is still a tiny chance that mana_poll_tx_cq() can re-enable 2756 * a txq because it may not timely see apc->port_is_up being cleared 2757 * to false, but it doesn't matter since mana_start_xmit() drops any 2758 * new packets due to apc->port_is_up being false. 2759 * 2760 * Drain all the in-flight TX packets. 2761 * A timeout of 120 seconds for all the queues is used. 2762 * This will break the while loop when h/w is not responding. 2763 * This value of 120 has been decided here considering max 2764 * number of queues. 2765 */ 2766 2767 for (i = 0; i < apc->num_queues; i++) { 2768 txq = &apc->tx_qp[i].txq; 2769 tsleep = 1000; 2770 while (atomic_read(&txq->pending_sends) > 0 && 2771 time_before(jiffies, timeout)) { 2772 usleep_range(tsleep, tsleep + 1000); 2773 tsleep <<= 1; 2774 } 2775 if (atomic_read(&txq->pending_sends)) { 2776 err = pcie_flr(to_pci_dev(gd->gdma_context->dev)); 2777 if (err) { 2778 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n", 2779 err, atomic_read(&txq->pending_sends), 2780 txq->gdma_txq_id); 2781 } 2782 break; 2783 } 2784 } 2785 2786 for (i = 0; i < apc->num_queues; i++) { 2787 txq = &apc->tx_qp[i].txq; 2788 while ((skb = skb_dequeue(&txq->pending_skbs))) { 2789 mana_unmap_skb(skb, apc); 2790 dev_kfree_skb_any(skb); 2791 } 2792 atomic_set(&txq->pending_sends, 0); 2793 } 2794 /* We're 100% sure the queues can no longer be woken up, because 2795 * we're sure now mana_poll_tx_cq() can't be running. 2796 */ 2797 2798 apc->rss_state = TRI_STATE_FALSE; 2799 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false); 2800 if (err) { 2801 netdev_err(ndev, "Failed to disable vPort: %d\n", err); 2802 return err; 2803 } 2804 2805 mana_destroy_vport(apc); 2806 2807 return 0; 2808 } 2809 2810 int mana_detach(struct net_device *ndev, bool from_close) 2811 { 2812 struct mana_port_context *apc = netdev_priv(ndev); 2813 int err; 2814 2815 ASSERT_RTNL(); 2816 2817 apc->port_st_save = apc->port_is_up; 2818 apc->port_is_up = false; 2819 2820 /* Ensure port state updated before txq state */ 2821 smp_wmb(); 2822 2823 netif_tx_disable(ndev); 2824 netif_carrier_off(ndev); 2825 2826 if (apc->port_st_save) { 2827 err = mana_dealloc_queues(ndev); 2828 if (err) 2829 return err; 2830 } 2831 2832 if (!from_close) { 2833 netif_device_detach(ndev); 2834 mana_cleanup_port_context(apc); 2835 } 2836 2837 return 0; 2838 } 2839 2840 static int mana_probe_port(struct mana_context *ac, int port_idx, 2841 struct net_device **ndev_storage) 2842 { 2843 struct gdma_context *gc = ac->gdma_dev->gdma_context; 2844 struct mana_port_context *apc; 2845 struct net_device *ndev; 2846 int err; 2847 2848 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context), 2849 gc->max_num_queues); 2850 if (!ndev) 2851 return -ENOMEM; 2852 2853 *ndev_storage = ndev; 2854 2855 apc = netdev_priv(ndev); 2856 apc->ac = ac; 2857 apc->ndev = ndev; 2858 apc->max_queues = gc->max_num_queues; 2859 apc->num_queues = gc->max_num_queues; 2860 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE; 2861 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE; 2862 apc->port_handle = INVALID_MANA_HANDLE; 2863 apc->pf_filter_handle = INVALID_MANA_HANDLE; 2864 apc->port_idx = port_idx; 2865 2866 mutex_init(&apc->vport_mutex); 2867 apc->vport_use_count = 0; 2868 2869 ndev->netdev_ops = &mana_devops; 2870 ndev->ethtool_ops = &mana_ethtool_ops; 2871 ndev->mtu = ETH_DATA_LEN; 2872 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN; 2873 ndev->min_mtu = ETH_MIN_MTU; 2874 ndev->needed_headroom = MANA_HEADROOM; 2875 ndev->dev_port = port_idx; 2876 SET_NETDEV_DEV(ndev, gc->dev); 2877 2878 netif_carrier_off(ndev); 2879 2880 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE); 2881 2882 err = mana_init_port(ndev); 2883 if (err) 2884 goto free_net; 2885 2886 err = mana_rss_table_alloc(apc); 2887 if (err) 2888 goto reset_apc; 2889 2890 netdev_lockdep_set_classes(ndev); 2891 2892 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 2893 ndev->hw_features |= NETIF_F_RXCSUM; 2894 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 2895 ndev->hw_features |= NETIF_F_RXHASH; 2896 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | 2897 NETIF_F_HW_VLAN_CTAG_RX; 2898 ndev->vlan_features = ndev->features; 2899 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC | 2900 NETDEV_XDP_ACT_REDIRECT | 2901 NETDEV_XDP_ACT_NDO_XMIT); 2902 2903 err = register_netdev(ndev); 2904 if (err) { 2905 netdev_err(ndev, "Unable to register netdev.\n"); 2906 goto free_indir; 2907 } 2908 2909 return 0; 2910 2911 free_indir: 2912 mana_cleanup_indir_table(apc); 2913 reset_apc: 2914 mana_cleanup_port_context(apc); 2915 free_net: 2916 *ndev_storage = NULL; 2917 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err); 2918 free_netdev(ndev); 2919 return err; 2920 } 2921 2922 static void adev_release(struct device *dev) 2923 { 2924 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev); 2925 2926 kfree(madev); 2927 } 2928 2929 static void remove_adev(struct gdma_dev *gd) 2930 { 2931 struct auxiliary_device *adev = gd->adev; 2932 int id = adev->id; 2933 2934 auxiliary_device_delete(adev); 2935 auxiliary_device_uninit(adev); 2936 2937 mana_adev_idx_free(id); 2938 gd->adev = NULL; 2939 } 2940 2941 static int add_adev(struct gdma_dev *gd) 2942 { 2943 struct auxiliary_device *adev; 2944 struct mana_adev *madev; 2945 int ret; 2946 2947 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 2948 if (!madev) 2949 return -ENOMEM; 2950 2951 adev = &madev->adev; 2952 ret = mana_adev_idx_alloc(); 2953 if (ret < 0) 2954 goto idx_fail; 2955 adev->id = ret; 2956 2957 adev->name = "rdma"; 2958 adev->dev.parent = gd->gdma_context->dev; 2959 adev->dev.release = adev_release; 2960 madev->mdev = gd; 2961 2962 ret = auxiliary_device_init(adev); 2963 if (ret) 2964 goto init_fail; 2965 2966 /* madev is owned by the auxiliary device */ 2967 madev = NULL; 2968 ret = auxiliary_device_add(adev); 2969 if (ret) 2970 goto add_fail; 2971 2972 gd->adev = adev; 2973 return 0; 2974 2975 add_fail: 2976 auxiliary_device_uninit(adev); 2977 2978 init_fail: 2979 mana_adev_idx_free(adev->id); 2980 2981 idx_fail: 2982 kfree(madev); 2983 2984 return ret; 2985 } 2986 2987 int mana_probe(struct gdma_dev *gd, bool resuming) 2988 { 2989 struct gdma_context *gc = gd->gdma_context; 2990 struct mana_context *ac = gd->driver_data; 2991 struct device *dev = gc->dev; 2992 u16 num_ports = 0; 2993 int err; 2994 int i; 2995 2996 dev_info(dev, 2997 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n", 2998 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION); 2999 3000 err = mana_gd_register_device(gd); 3001 if (err) 3002 return err; 3003 3004 if (!resuming) { 3005 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 3006 if (!ac) 3007 return -ENOMEM; 3008 3009 ac->gdma_dev = gd; 3010 gd->driver_data = ac; 3011 } 3012 3013 err = mana_create_eq(ac); 3014 if (err) 3015 goto out; 3016 3017 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION, 3018 MANA_MICRO_VERSION, &num_ports); 3019 if (err) 3020 goto out; 3021 3022 if (!resuming) { 3023 ac->num_ports = num_ports; 3024 } else { 3025 if (ac->num_ports != num_ports) { 3026 dev_err(dev, "The number of vPorts changed: %d->%d\n", 3027 ac->num_ports, num_ports); 3028 err = -EPROTO; 3029 goto out; 3030 } 3031 } 3032 3033 if (ac->num_ports == 0) 3034 dev_err(dev, "Failed to detect any vPort\n"); 3035 3036 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV) 3037 ac->num_ports = MAX_PORTS_IN_MANA_DEV; 3038 3039 if (!resuming) { 3040 for (i = 0; i < ac->num_ports; i++) { 3041 err = mana_probe_port(ac, i, &ac->ports[i]); 3042 /* we log the port for which the probe failed and stop 3043 * probes for subsequent ports. 3044 * Note that we keep running ports, for which the probes 3045 * were successful, unless add_adev fails too 3046 */ 3047 if (err) { 3048 dev_err(dev, "Probe Failed for port %d\n", i); 3049 break; 3050 } 3051 } 3052 } else { 3053 for (i = 0; i < ac->num_ports; i++) { 3054 rtnl_lock(); 3055 err = mana_attach(ac->ports[i]); 3056 rtnl_unlock(); 3057 /* we log the port for which the attach failed and stop 3058 * attach for subsequent ports 3059 * Note that we keep running ports, for which the attach 3060 * were successful, unless add_adev fails too 3061 */ 3062 if (err) { 3063 dev_err(dev, "Attach Failed for port %d\n", i); 3064 break; 3065 } 3066 } 3067 } 3068 3069 err = add_adev(gd); 3070 out: 3071 if (err) 3072 mana_remove(gd, false); 3073 3074 return err; 3075 } 3076 3077 void mana_remove(struct gdma_dev *gd, bool suspending) 3078 { 3079 struct gdma_context *gc = gd->gdma_context; 3080 struct mana_context *ac = gd->driver_data; 3081 struct mana_port_context *apc; 3082 struct device *dev = gc->dev; 3083 struct net_device *ndev; 3084 int err; 3085 int i; 3086 3087 /* adev currently doesn't support suspending, always remove it */ 3088 if (gd->adev) 3089 remove_adev(gd); 3090 3091 for (i = 0; i < ac->num_ports; i++) { 3092 ndev = ac->ports[i]; 3093 apc = netdev_priv(ndev); 3094 if (!ndev) { 3095 if (i == 0) 3096 dev_err(dev, "No net device to remove\n"); 3097 goto out; 3098 } 3099 3100 /* All cleanup actions should stay after rtnl_lock(), otherwise 3101 * other functions may access partially cleaned up data. 3102 */ 3103 rtnl_lock(); 3104 3105 err = mana_detach(ndev, false); 3106 if (err) 3107 netdev_err(ndev, "Failed to detach vPort %d: %d\n", 3108 i, err); 3109 3110 if (suspending) { 3111 /* No need to unregister the ndev. */ 3112 rtnl_unlock(); 3113 continue; 3114 } 3115 3116 unregister_netdevice(ndev); 3117 mana_cleanup_indir_table(apc); 3118 3119 rtnl_unlock(); 3120 3121 free_netdev(ndev); 3122 } 3123 3124 mana_destroy_eq(ac); 3125 out: 3126 mana_gd_deregister_device(gd); 3127 3128 if (suspending) 3129 return; 3130 3131 gd->driver_data = NULL; 3132 gd->gdma_context = NULL; 3133 kfree(ac); 3134 } 3135 3136 struct net_device *mana_get_primary_netdev_rcu(struct mana_context *ac, u32 port_index) 3137 { 3138 struct net_device *ndev; 3139 3140 RCU_LOCKDEP_WARN(!rcu_read_lock_held(), 3141 "Taking primary netdev without holding the RCU read lock"); 3142 if (port_index >= ac->num_ports) 3143 return NULL; 3144 3145 /* When mana is used in netvsc, the upper netdevice should be returned. */ 3146 if (ac->ports[port_index]->flags & IFF_SLAVE) 3147 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]); 3148 else 3149 ndev = ac->ports[port_index]; 3150 3151 return ndev; 3152 } 3153 EXPORT_SYMBOL_NS(mana_get_primary_netdev_rcu, "NET_MANA"); 3154