1 /* 2 * Copyright (c) 2012-2014 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/etherdevice.h> 18 #include <net/ieee80211_radiotap.h> 19 #include <linux/if_arp.h> 20 #include <linux/moduleparam.h> 21 #include <linux/ip.h> 22 #include <linux/ipv6.h> 23 #include <net/ipv6.h> 24 #include <linux/prefetch.h> 25 26 #include "wil6210.h" 27 #include "wmi.h" 28 #include "txrx.h" 29 #include "trace.h" 30 31 static bool rtap_include_phy_info; 32 module_param(rtap_include_phy_info, bool, S_IRUGO); 33 MODULE_PARM_DESC(rtap_include_phy_info, 34 " Include PHY info in the radiotap header, default - no"); 35 36 static inline int wil_vring_is_empty(struct vring *vring) 37 { 38 return vring->swhead == vring->swtail; 39 } 40 41 static inline u32 wil_vring_next_tail(struct vring *vring) 42 { 43 return (vring->swtail + 1) % vring->size; 44 } 45 46 static inline void wil_vring_advance_head(struct vring *vring, int n) 47 { 48 vring->swhead = (vring->swhead + n) % vring->size; 49 } 50 51 static inline int wil_vring_is_full(struct vring *vring) 52 { 53 return wil_vring_next_tail(vring) == vring->swhead; 54 } 55 56 /* Used space in Tx Vring */ 57 static inline int wil_vring_used_tx(struct vring *vring) 58 { 59 u32 swhead = vring->swhead; 60 u32 swtail = vring->swtail; 61 return (vring->size + swhead - swtail) % vring->size; 62 } 63 64 /* Available space in Tx Vring */ 65 static inline int wil_vring_avail_tx(struct vring *vring) 66 { 67 return vring->size - wil_vring_used_tx(vring) - 1; 68 } 69 70 /* wil_vring_wmark_low - low watermark for available descriptor space */ 71 static inline int wil_vring_wmark_low(struct vring *vring) 72 { 73 return vring->size/8; 74 } 75 76 /* wil_vring_wmark_high - high watermark for available descriptor space */ 77 static inline int wil_vring_wmark_high(struct vring *vring) 78 { 79 return vring->size/4; 80 } 81 82 /* wil_val_in_range - check if value in [min,max) */ 83 static inline bool wil_val_in_range(int val, int min, int max) 84 { 85 return val >= min && val < max; 86 } 87 88 static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 89 { 90 struct device *dev = wil_to_dev(wil); 91 size_t sz = vring->size * sizeof(vring->va[0]); 92 uint i; 93 94 wil_dbg_misc(wil, "%s()\n", __func__); 95 96 BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 97 98 vring->swhead = 0; 99 vring->swtail = 0; 100 vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 101 if (!vring->ctx) { 102 vring->va = NULL; 103 return -ENOMEM; 104 } 105 /* vring->va should be aligned on its size rounded up to power of 2 106 * This is granted by the dma_alloc_coherent 107 */ 108 vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 109 if (!vring->va) { 110 kfree(vring->ctx); 111 vring->ctx = NULL; 112 return -ENOMEM; 113 } 114 /* initially, all descriptors are SW owned 115 * For Tx and Rx, ownership bit is at the same location, thus 116 * we can use any 117 */ 118 for (i = 0; i < vring->size; i++) { 119 volatile struct vring_tx_desc *_d = &vring->va[i].tx; 120 121 _d->dma.status = TX_DMA_STATUS_DU; 122 } 123 124 wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 125 vring->va, &vring->pa, vring->ctx); 126 127 return 0; 128 } 129 130 static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 131 struct wil_ctx *ctx) 132 { 133 dma_addr_t pa = wil_desc_addr(&d->dma.addr); 134 u16 dmalen = le16_to_cpu(d->dma.length); 135 136 switch (ctx->mapped_as) { 137 case wil_mapped_as_single: 138 dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 139 break; 140 case wil_mapped_as_page: 141 dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 142 break; 143 default: 144 break; 145 } 146 } 147 148 static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 149 int tx) 150 { 151 struct device *dev = wil_to_dev(wil); 152 size_t sz = vring->size * sizeof(vring->va[0]); 153 154 if (tx) { 155 int vring_index = vring - wil->vring_tx; 156 157 wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 158 vring_index, vring->size, vring->va, 159 &vring->pa, vring->ctx); 160 } else { 161 wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 162 vring->size, vring->va, 163 &vring->pa, vring->ctx); 164 } 165 166 while (!wil_vring_is_empty(vring)) { 167 dma_addr_t pa; 168 u16 dmalen; 169 struct wil_ctx *ctx; 170 171 if (tx) { 172 struct vring_tx_desc dd, *d = ⅆ 173 volatile struct vring_tx_desc *_d = 174 &vring->va[vring->swtail].tx; 175 176 ctx = &vring->ctx[vring->swtail]; 177 *d = *_d; 178 wil_txdesc_unmap(dev, d, ctx); 179 if (ctx->skb) 180 dev_kfree_skb_any(ctx->skb); 181 vring->swtail = wil_vring_next_tail(vring); 182 } else { /* rx */ 183 struct vring_rx_desc dd, *d = ⅆ 184 volatile struct vring_rx_desc *_d = 185 &vring->va[vring->swhead].rx; 186 187 ctx = &vring->ctx[vring->swhead]; 188 *d = *_d; 189 pa = wil_desc_addr(&d->dma.addr); 190 dmalen = le16_to_cpu(d->dma.length); 191 dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 192 kfree_skb(ctx->skb); 193 wil_vring_advance_head(vring, 1); 194 } 195 } 196 dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 197 kfree(vring->ctx); 198 vring->pa = 0; 199 vring->va = NULL; 200 vring->ctx = NULL; 201 } 202 203 /** 204 * Allocate one skb for Rx VRING 205 * 206 * Safe to call from IRQ 207 */ 208 static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 209 u32 i, int headroom) 210 { 211 struct device *dev = wil_to_dev(wil); 212 unsigned int sz = mtu_max + ETH_HLEN; 213 struct vring_rx_desc dd, *d = ⅆ 214 volatile struct vring_rx_desc *_d = &vring->va[i].rx; 215 dma_addr_t pa; 216 struct sk_buff *skb = dev_alloc_skb(sz + headroom); 217 218 if (unlikely(!skb)) 219 return -ENOMEM; 220 221 skb_reserve(skb, headroom); 222 skb_put(skb, sz); 223 224 pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 225 if (unlikely(dma_mapping_error(dev, pa))) { 226 kfree_skb(skb); 227 return -ENOMEM; 228 } 229 230 d->dma.d0 = BIT(9) | RX_DMA_D0_CMD_DMA_IT; 231 wil_desc_addr_set(&d->dma.addr, pa); 232 /* ip_length don't care */ 233 /* b11 don't care */ 234 /* error don't care */ 235 d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 236 d->dma.length = cpu_to_le16(sz); 237 *_d = *d; 238 vring->ctx[i].skb = skb; 239 240 return 0; 241 } 242 243 /** 244 * Adds radiotap header 245 * 246 * Any error indicated as "Bad FCS" 247 * 248 * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 249 * - Rx descriptor: 32 bytes 250 * - Phy info 251 */ 252 static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 253 struct sk_buff *skb) 254 { 255 struct wireless_dev *wdev = wil->wdev; 256 struct wil6210_rtap { 257 struct ieee80211_radiotap_header rthdr; 258 /* fields should be in the order of bits in rthdr.it_present */ 259 /* flags */ 260 u8 flags; 261 /* channel */ 262 __le16 chnl_freq __aligned(2); 263 __le16 chnl_flags; 264 /* MCS */ 265 u8 mcs_present; 266 u8 mcs_flags; 267 u8 mcs_index; 268 } __packed; 269 struct wil6210_rtap_vendor { 270 struct wil6210_rtap rtap; 271 /* vendor */ 272 u8 vendor_oui[3] __aligned(2); 273 u8 vendor_ns; 274 __le16 vendor_skip; 275 u8 vendor_data[0]; 276 } __packed; 277 struct vring_rx_desc *d = wil_skb_rxdesc(skb); 278 struct wil6210_rtap_vendor *rtap_vendor; 279 int rtap_len = sizeof(struct wil6210_rtap); 280 int phy_length = 0; /* phy info header size, bytes */ 281 static char phy_data[128]; 282 struct ieee80211_channel *ch = wdev->preset_chandef.chan; 283 284 if (rtap_include_phy_info) { 285 rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 286 /* calculate additional length */ 287 if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 288 /** 289 * PHY info starts from 8-byte boundary 290 * there are 8-byte lines, last line may be partially 291 * written (HW bug), thus FW configures for last line 292 * to be excessive. Driver skips this last line. 293 */ 294 int len = min_t(int, 8 + sizeof(phy_data), 295 wil_rxdesc_phy_length(d)); 296 297 if (len > 8) { 298 void *p = skb_tail_pointer(skb); 299 void *pa = PTR_ALIGN(p, 8); 300 301 if (skb_tailroom(skb) >= len + (pa - p)) { 302 phy_length = len - 8; 303 memcpy(phy_data, pa, phy_length); 304 } 305 } 306 } 307 rtap_len += phy_length; 308 } 309 310 if (skb_headroom(skb) < rtap_len && 311 pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 312 wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); 313 return; 314 } 315 316 rtap_vendor = (void *)skb_push(skb, rtap_len); 317 memset(rtap_vendor, 0, rtap_len); 318 319 rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 320 rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 321 rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 322 (1 << IEEE80211_RADIOTAP_FLAGS) | 323 (1 << IEEE80211_RADIOTAP_CHANNEL) | 324 (1 << IEEE80211_RADIOTAP_MCS)); 325 if (d->dma.status & RX_DMA_STATUS_ERROR) 326 rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 327 328 rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 329 rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 330 331 rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 332 rtap_vendor->rtap.mcs_flags = 0; 333 rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 334 335 if (rtap_include_phy_info) { 336 rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 337 IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 338 /* OUI for Wilocity 04:ce:14 */ 339 rtap_vendor->vendor_oui[0] = 0x04; 340 rtap_vendor->vendor_oui[1] = 0xce; 341 rtap_vendor->vendor_oui[2] = 0x14; 342 rtap_vendor->vendor_ns = 1; 343 /* Rx descriptor + PHY data */ 344 rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 345 phy_length); 346 memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 347 memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 348 phy_length); 349 } 350 } 351 352 /** 353 * reap 1 frame from @swhead 354 * 355 * Rx descriptor copied to skb->cb 356 * 357 * Safe to call from IRQ 358 */ 359 static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 360 struct vring *vring) 361 { 362 struct device *dev = wil_to_dev(wil); 363 struct net_device *ndev = wil_to_ndev(wil); 364 volatile struct vring_rx_desc *_d; 365 struct vring_rx_desc *d; 366 struct sk_buff *skb; 367 dma_addr_t pa; 368 unsigned int sz = mtu_max + ETH_HLEN; 369 u16 dmalen; 370 u8 ftype; 371 int cid; 372 int i = (int)vring->swhead; 373 struct wil_net_stats *stats; 374 375 BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 376 377 if (unlikely(wil_vring_is_empty(vring))) 378 return NULL; 379 380 _d = &vring->va[i].rx; 381 if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 382 /* it is not error, we just reached end of Rx done area */ 383 return NULL; 384 } 385 386 skb = vring->ctx[i].skb; 387 vring->ctx[i].skb = NULL; 388 wil_vring_advance_head(vring, 1); 389 if (!skb) { 390 wil_err(wil, "No Rx skb at [%d]\n", i); 391 return NULL; 392 } 393 d = wil_skb_rxdesc(skb); 394 *d = *_d; 395 pa = wil_desc_addr(&d->dma.addr); 396 397 dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 398 dmalen = le16_to_cpu(d->dma.length); 399 400 trace_wil6210_rx(i, d); 401 wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 402 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4, 403 (const void *)d, sizeof(*d), false); 404 405 if (unlikely(dmalen > sz)) { 406 wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 407 kfree_skb(skb); 408 return NULL; 409 } 410 skb_trim(skb, dmalen); 411 412 prefetch(skb->data); 413 414 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 415 skb->data, skb_headlen(skb), false); 416 417 cid = wil_rxdesc_cid(d); 418 stats = &wil->sta[cid].stats; 419 stats->last_mcs_rx = wil_rxdesc_mcs(d); 420 421 /* use radiotap header only if required */ 422 if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 423 wil_rx_add_radiotap_header(wil, skb); 424 425 /* no extra checks if in sniffer mode */ 426 if (ndev->type != ARPHRD_ETHER) 427 return skb; 428 /* 429 * Non-data frames may be delivered through Rx DMA channel (ex: BAR) 430 * Driver should recognize it by frame type, that is found 431 * in Rx descriptor. If type is not data, it is 802.11 frame as is 432 */ 433 ftype = wil_rxdesc_ftype(d) << 2; 434 if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 435 wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype); 436 /* TODO: process it */ 437 kfree_skb(skb); 438 return NULL; 439 } 440 441 if (unlikely(skb->len < ETH_HLEN)) { 442 wil_err(wil, "Short frame, len = %d\n", skb->len); 443 /* TODO: process it (i.e. BAR) */ 444 kfree_skb(skb); 445 return NULL; 446 } 447 448 /* L4 IDENT is on when HW calculated checksum, check status 449 * and in case of error drop the packet 450 * higher stack layers will handle retransmission (if required) 451 */ 452 if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 453 /* L4 protocol identified, csum calculated */ 454 if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 455 skb->ip_summed = CHECKSUM_UNNECESSARY; 456 /* If HW reports bad checksum, let IP stack re-check it 457 * For example, HW don't understand Microsoft IP stack that 458 * mis-calculates TCP checksum - if it should be 0x0, 459 * it writes 0xffff in violation of RFC 1624 460 */ 461 } 462 463 return skb; 464 } 465 466 /** 467 * allocate and fill up to @count buffers in rx ring 468 * buffers posted at @swtail 469 */ 470 static int wil_rx_refill(struct wil6210_priv *wil, int count) 471 { 472 struct net_device *ndev = wil_to_ndev(wil); 473 struct vring *v = &wil->vring_rx; 474 u32 next_tail; 475 int rc = 0; 476 int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 477 WIL6210_RTAP_SIZE : 0; 478 479 for (; next_tail = wil_vring_next_tail(v), 480 (next_tail != v->swhead) && (count-- > 0); 481 v->swtail = next_tail) { 482 rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 483 if (unlikely(rc)) { 484 wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 485 rc, v->swtail); 486 break; 487 } 488 } 489 iowrite32(v->swtail, wil->csr + HOSTADDR(v->hwtail)); 490 491 return rc; 492 } 493 494 /* 495 * Pass Rx packet to the netif. Update statistics. 496 * Called in softirq context (NAPI poll). 497 */ 498 void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 499 { 500 gro_result_t rc = GRO_NORMAL; 501 struct wil6210_priv *wil = ndev_to_wil(ndev); 502 struct wireless_dev *wdev = wil_to_wdev(wil); 503 unsigned int len = skb->len; 504 struct vring_rx_desc *d = wil_skb_rxdesc(skb); 505 int cid = wil_rxdesc_cid(d); 506 struct ethhdr *eth = (void *)skb->data; 507 /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 508 * is not suitable, need to look at data 509 */ 510 int mcast = is_multicast_ether_addr(eth->h_dest); 511 struct wil_net_stats *stats = &wil->sta[cid].stats; 512 struct sk_buff *xmit_skb = NULL; 513 static const char * const gro_res_str[] = { 514 [GRO_MERGED] = "GRO_MERGED", 515 [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 516 [GRO_HELD] = "GRO_HELD", 517 [GRO_NORMAL] = "GRO_NORMAL", 518 [GRO_DROP] = "GRO_DROP", 519 }; 520 521 skb_orphan(skb); 522 523 if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 524 if (mcast) { 525 /* send multicast frames both to higher layers in 526 * local net stack and back to the wireless medium 527 */ 528 xmit_skb = skb_copy(skb, GFP_ATOMIC); 529 } else { 530 int xmit_cid = wil_find_cid(wil, eth->h_dest); 531 532 if (xmit_cid >= 0) { 533 /* The destination station is associated to 534 * this AP (in this VLAN), so send the frame 535 * directly to it and do not pass it to local 536 * net stack. 537 */ 538 xmit_skb = skb; 539 skb = NULL; 540 } 541 } 542 } 543 if (xmit_skb) { 544 /* Send to wireless media and increase priority by 256 to 545 * keep the received priority instead of reclassifying 546 * the frame (see cfg80211_classify8021d). 547 */ 548 xmit_skb->dev = ndev; 549 xmit_skb->priority += 256; 550 xmit_skb->protocol = htons(ETH_P_802_3); 551 skb_reset_network_header(xmit_skb); 552 skb_reset_mac_header(xmit_skb); 553 wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 554 dev_queue_xmit(xmit_skb); 555 } 556 557 if (skb) { /* deliver to local stack */ 558 559 skb->protocol = eth_type_trans(skb, ndev); 560 rc = napi_gro_receive(&wil->napi_rx, skb); 561 wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 562 len, gro_res_str[rc]); 563 } 564 /* statistics. rc set to GRO_NORMAL for AP bridging */ 565 if (unlikely(rc == GRO_DROP)) { 566 ndev->stats.rx_dropped++; 567 stats->rx_dropped++; 568 wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 569 } else { 570 ndev->stats.rx_packets++; 571 stats->rx_packets++; 572 ndev->stats.rx_bytes += len; 573 stats->rx_bytes += len; 574 if (mcast) 575 ndev->stats.multicast++; 576 } 577 } 578 579 /** 580 * Proceed all completed skb's from Rx VRING 581 * 582 * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 583 */ 584 void wil_rx_handle(struct wil6210_priv *wil, int *quota) 585 { 586 struct net_device *ndev = wil_to_ndev(wil); 587 struct vring *v = &wil->vring_rx; 588 struct sk_buff *skb; 589 590 if (unlikely(!v->va)) { 591 wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 592 return; 593 } 594 wil_dbg_txrx(wil, "%s()\n", __func__); 595 while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 596 (*quota)--; 597 598 if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 599 skb->dev = ndev; 600 skb_reset_mac_header(skb); 601 skb->ip_summed = CHECKSUM_UNNECESSARY; 602 skb->pkt_type = PACKET_OTHERHOST; 603 skb->protocol = htons(ETH_P_802_2); 604 wil_netif_rx_any(skb, ndev); 605 } else { 606 wil_rx_reorder(wil, skb); 607 } 608 } 609 wil_rx_refill(wil, v->size); 610 } 611 612 int wil_rx_init(struct wil6210_priv *wil, u16 size) 613 { 614 struct vring *vring = &wil->vring_rx; 615 int rc; 616 617 wil_dbg_misc(wil, "%s()\n", __func__); 618 619 if (vring->va) { 620 wil_err(wil, "Rx ring already allocated\n"); 621 return -EINVAL; 622 } 623 624 vring->size = size; 625 rc = wil_vring_alloc(wil, vring); 626 if (rc) 627 return rc; 628 629 rc = wmi_rx_chain_add(wil, vring); 630 if (rc) 631 goto err_free; 632 633 rc = wil_rx_refill(wil, vring->size); 634 if (rc) 635 goto err_free; 636 637 return 0; 638 err_free: 639 wil_vring_free(wil, vring, 0); 640 641 return rc; 642 } 643 644 void wil_rx_fini(struct wil6210_priv *wil) 645 { 646 struct vring *vring = &wil->vring_rx; 647 648 wil_dbg_misc(wil, "%s()\n", __func__); 649 650 if (vring->va) 651 wil_vring_free(wil, vring, 0); 652 } 653 654 int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 655 int cid, int tid) 656 { 657 int rc; 658 struct wmi_vring_cfg_cmd cmd = { 659 .action = cpu_to_le32(WMI_VRING_CMD_ADD), 660 .vring_cfg = { 661 .tx_sw_ring = { 662 .max_mpdu_size = 663 cpu_to_le16(wil_mtu2macbuf(mtu_max)), 664 .ring_size = cpu_to_le16(size), 665 }, 666 .ringid = id, 667 .cidxtid = mk_cidxtid(cid, tid), 668 .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 669 .mac_ctrl = 0, 670 .to_resolution = 0, 671 .agg_max_wsize = 0, 672 .schd_params = { 673 .priority = cpu_to_le16(0), 674 .timeslot_us = cpu_to_le16(0xfff), 675 }, 676 }, 677 }; 678 struct { 679 struct wil6210_mbox_hdr_wmi wmi; 680 struct wmi_vring_cfg_done_event cmd; 681 } __packed reply; 682 struct vring *vring = &wil->vring_tx[id]; 683 struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 684 685 wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 686 cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 687 688 if (vring->va) { 689 wil_err(wil, "Tx ring [%d] already allocated\n", id); 690 rc = -EINVAL; 691 goto out; 692 } 693 694 memset(txdata, 0, sizeof(*txdata)); 695 spin_lock_init(&txdata->lock); 696 vring->size = size; 697 rc = wil_vring_alloc(wil, vring); 698 if (rc) 699 goto out; 700 701 wil->vring2cid_tid[id][0] = cid; 702 wil->vring2cid_tid[id][1] = tid; 703 704 cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 705 706 rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 707 WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 708 if (rc) 709 goto out_free; 710 711 if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 712 wil_err(wil, "Tx config failed, status 0x%02x\n", 713 reply.cmd.status); 714 rc = -EINVAL; 715 goto out_free; 716 } 717 vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 718 719 txdata->enabled = 1; 720 if (wil->sta[cid].data_port_open && (agg_wsize >= 0)) 721 wil_addba_tx_request(wil, id, agg_wsize); 722 723 return 0; 724 out_free: 725 wil_vring_free(wil, vring, 1); 726 out: 727 728 return rc; 729 } 730 731 void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 732 { 733 struct vring *vring = &wil->vring_tx[id]; 734 struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 735 736 WARN_ON(!mutex_is_locked(&wil->mutex)); 737 738 if (!vring->va) 739 return; 740 741 wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 742 743 spin_lock_bh(&txdata->lock); 744 txdata->enabled = 0; /* no Tx can be in progress or start anew */ 745 spin_unlock_bh(&txdata->lock); 746 /* make sure NAPI won't touch this vring */ 747 if (test_bit(wil_status_napi_en, wil->status)) 748 napi_synchronize(&wil->napi_tx); 749 750 wil_vring_free(wil, vring, 1); 751 memset(txdata, 0, sizeof(*txdata)); 752 } 753 754 static struct vring *wil_find_tx_vring(struct wil6210_priv *wil, 755 struct sk_buff *skb) 756 { 757 int i; 758 struct ethhdr *eth = (void *)skb->data; 759 int cid = wil_find_cid(wil, eth->h_dest); 760 761 if (cid < 0) 762 return NULL; 763 764 if (!wil->sta[cid].data_port_open && 765 (skb->protocol != cpu_to_be16(ETH_P_PAE))) 766 return NULL; 767 768 /* TODO: fix for multiple TID */ 769 for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 770 if (wil->vring2cid_tid[i][0] == cid) { 771 struct vring *v = &wil->vring_tx[i]; 772 773 wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 774 __func__, eth->h_dest, i); 775 if (v->va) { 776 return v; 777 } else { 778 wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 779 return NULL; 780 } 781 } 782 } 783 784 return NULL; 785 } 786 787 static void wil_set_da_for_vring(struct wil6210_priv *wil, 788 struct sk_buff *skb, int vring_index) 789 { 790 struct ethhdr *eth = (void *)skb->data; 791 int cid = wil->vring2cid_tid[vring_index][0]; 792 793 memcpy(eth->h_dest, wil->sta[cid].addr, ETH_ALEN); 794 } 795 796 static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 797 struct sk_buff *skb); 798 799 static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 800 struct sk_buff *skb) 801 { 802 struct vring *v; 803 int i; 804 u8 cid; 805 806 /* In the STA mode, it is expected to have only 1 VRING 807 * for the AP we connected to. 808 * find 1-st vring and see whether it is eligible for data 809 */ 810 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 811 v = &wil->vring_tx[i]; 812 if (!v->va) 813 continue; 814 815 cid = wil->vring2cid_tid[i][0]; 816 if (!wil->sta[cid].data_port_open && 817 (skb->protocol != cpu_to_be16(ETH_P_PAE))) 818 break; 819 820 wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 821 822 return v; 823 } 824 825 wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 826 827 return NULL; 828 } 829 830 /* 831 * Find 1-st vring and return it; set dest address for this vring in skb 832 * duplicate skb and send it to other active vrings 833 */ 834 static struct vring *wil_tx_bcast(struct wil6210_priv *wil, 835 struct sk_buff *skb) 836 { 837 struct vring *v, *v2; 838 struct sk_buff *skb2; 839 int i; 840 u8 cid; 841 842 /* find 1-st vring eligible for data */ 843 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 844 v = &wil->vring_tx[i]; 845 if (!v->va) 846 continue; 847 848 cid = wil->vring2cid_tid[i][0]; 849 if (!wil->sta[cid].data_port_open) 850 continue; 851 852 goto found; 853 } 854 855 wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 856 857 return NULL; 858 859 found: 860 wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 861 wil_set_da_for_vring(wil, skb, i); 862 863 /* find other active vrings and duplicate skb for each */ 864 for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 865 v2 = &wil->vring_tx[i]; 866 if (!v2->va) 867 continue; 868 cid = wil->vring2cid_tid[i][0]; 869 if (!wil->sta[cid].data_port_open) 870 continue; 871 872 skb2 = skb_copy(skb, GFP_ATOMIC); 873 if (skb2) { 874 wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 875 wil_set_da_for_vring(wil, skb2, i); 876 wil_tx_vring(wil, v2, skb2); 877 } else { 878 wil_err(wil, "skb_copy failed\n"); 879 } 880 } 881 882 return v; 883 } 884 885 static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 886 int vring_index) 887 { 888 wil_desc_addr_set(&d->dma.addr, pa); 889 d->dma.ip_length = 0; 890 /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 891 d->dma.b11 = 0/*14 | BIT(7)*/; 892 d->dma.error = 0; 893 d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 894 d->dma.length = cpu_to_le16((u16)len); 895 d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 896 d->mac.d[0] = 0; 897 d->mac.d[1] = 0; 898 d->mac.d[2] = 0; 899 d->mac.ucode_cmd = 0; 900 /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 901 d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 902 (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 903 904 return 0; 905 } 906 907 static inline 908 void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 909 { 910 d->mac.d[2] |= ((nr_frags + 1) << 911 MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 912 } 913 914 static int wil_tx_desc_offload_cksum_set(struct wil6210_priv *wil, 915 struct vring_tx_desc *d, 916 struct sk_buff *skb) 917 { 918 int protocol; 919 920 if (skb->ip_summed != CHECKSUM_PARTIAL) 921 return 0; 922 923 d->dma.b11 = ETH_HLEN; /* MAC header length */ 924 925 switch (skb->protocol) { 926 case cpu_to_be16(ETH_P_IP): 927 protocol = ip_hdr(skb)->protocol; 928 d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 929 break; 930 case cpu_to_be16(ETH_P_IPV6): 931 protocol = ipv6_hdr(skb)->nexthdr; 932 break; 933 default: 934 return -EINVAL; 935 } 936 937 switch (protocol) { 938 case IPPROTO_TCP: 939 d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 940 /* L4 header len: TCP header length */ 941 d->dma.d0 |= 942 (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 943 break; 944 case IPPROTO_UDP: 945 /* L4 header len: UDP header length */ 946 d->dma.d0 |= 947 (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 948 break; 949 default: 950 return -EINVAL; 951 } 952 953 d->dma.ip_length = skb_network_header_len(skb); 954 /* Enable TCP/UDP checksum */ 955 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 956 /* Calculate pseudo-header */ 957 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 958 959 return 0; 960 } 961 962 static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 963 struct sk_buff *skb) 964 { 965 struct device *dev = wil_to_dev(wil); 966 struct vring_tx_desc dd, *d = ⅆ 967 volatile struct vring_tx_desc *_d; 968 u32 swhead = vring->swhead; 969 int avail = wil_vring_avail_tx(vring); 970 int nr_frags = skb_shinfo(skb)->nr_frags; 971 uint f = 0; 972 int vring_index = vring - wil->vring_tx; 973 struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 974 uint i = swhead; 975 dma_addr_t pa; 976 int used; 977 978 wil_dbg_txrx(wil, "%s()\n", __func__); 979 980 if (unlikely(!txdata->enabled)) 981 return -EINVAL; 982 983 if (unlikely(avail < 1 + nr_frags)) { 984 wil_err_ratelimited(wil, 985 "Tx ring[%2d] full. No space for %d fragments\n", 986 vring_index, 1 + nr_frags); 987 return -ENOMEM; 988 } 989 _d = &vring->va[i].tx; 990 991 pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 992 993 wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 994 skb_headlen(skb), skb->data, &pa); 995 wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 996 skb->data, skb_headlen(skb), false); 997 998 if (unlikely(dma_mapping_error(dev, pa))) 999 return -EINVAL; 1000 vring->ctx[i].mapped_as = wil_mapped_as_single; 1001 /* 1-st segment */ 1002 wil_tx_desc_map(d, pa, skb_headlen(skb), vring_index); 1003 /* Process TCP/UDP checksum offloading */ 1004 if (unlikely(wil_tx_desc_offload_cksum_set(wil, d, skb))) { 1005 wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1006 vring_index); 1007 goto dma_error; 1008 } 1009 1010 vring->ctx[i].nr_frags = nr_frags; 1011 wil_tx_desc_set_nr_frags(d, nr_frags); 1012 1013 /* middle segments */ 1014 for (; f < nr_frags; f++) { 1015 const struct skb_frag_struct *frag = 1016 &skb_shinfo(skb)->frags[f]; 1017 int len = skb_frag_size(frag); 1018 1019 *_d = *d; 1020 wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 1021 wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 1022 (const void *)d, sizeof(*d), false); 1023 i = (swhead + f + 1) % vring->size; 1024 _d = &vring->va[i].tx; 1025 pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 1026 DMA_TO_DEVICE); 1027 if (unlikely(dma_mapping_error(dev, pa))) 1028 goto dma_error; 1029 vring->ctx[i].mapped_as = wil_mapped_as_page; 1030 wil_tx_desc_map(d, pa, len, vring_index); 1031 /* no need to check return code - 1032 * if it succeeded for 1-st descriptor, 1033 * it will succeed here too 1034 */ 1035 wil_tx_desc_offload_cksum_set(wil, d, skb); 1036 } 1037 /* for the last seg only */ 1038 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1039 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 1040 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 1041 *_d = *d; 1042 wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 1043 wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 1044 (const void *)d, sizeof(*d), false); 1045 1046 /* hold reference to skb 1047 * to prevent skb release before accounting 1048 * in case of immediate "tx done" 1049 */ 1050 vring->ctx[i].skb = skb_get(skb); 1051 1052 /* performance monitoring */ 1053 used = wil_vring_used_tx(vring); 1054 if (wil_val_in_range(vring_idle_trsh, 1055 used, used + nr_frags + 1)) { 1056 txdata->idle += get_cycles() - txdata->last_idle; 1057 wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 1058 vring_index, used, used + nr_frags + 1); 1059 } 1060 1061 /* advance swhead */ 1062 wil_vring_advance_head(vring, nr_frags + 1); 1063 wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 1064 vring->swhead); 1065 trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 1066 iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail)); 1067 1068 return 0; 1069 dma_error: 1070 /* unmap what we have mapped */ 1071 nr_frags = f + 1; /* frags mapped + one for skb head */ 1072 for (f = 0; f < nr_frags; f++) { 1073 struct wil_ctx *ctx; 1074 1075 i = (swhead + f) % vring->size; 1076 ctx = &vring->ctx[i]; 1077 _d = &vring->va[i].tx; 1078 *d = *_d; 1079 _d->dma.status = TX_DMA_STATUS_DU; 1080 wil_txdesc_unmap(dev, d, ctx); 1081 1082 if (ctx->skb) 1083 dev_kfree_skb_any(ctx->skb); 1084 1085 memset(ctx, 0, sizeof(*ctx)); 1086 } 1087 1088 return -EINVAL; 1089 } 1090 1091 static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1092 struct sk_buff *skb) 1093 { 1094 int vring_index = vring - wil->vring_tx; 1095 struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 1096 int rc; 1097 1098 spin_lock(&txdata->lock); 1099 rc = __wil_tx_vring(wil, vring, skb); 1100 spin_unlock(&txdata->lock); 1101 return rc; 1102 } 1103 1104 netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 1105 { 1106 struct wil6210_priv *wil = ndev_to_wil(ndev); 1107 struct ethhdr *eth = (void *)skb->data; 1108 struct vring *vring; 1109 static bool pr_once_fw; 1110 int rc; 1111 1112 wil_dbg_txrx(wil, "%s()\n", __func__); 1113 if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1114 if (!pr_once_fw) { 1115 wil_err(wil, "FW not ready\n"); 1116 pr_once_fw = true; 1117 } 1118 goto drop; 1119 } 1120 if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1121 wil_err(wil, "FW not connected\n"); 1122 goto drop; 1123 } 1124 if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 1125 wil_err(wil, "Xmit in monitor mode not supported\n"); 1126 goto drop; 1127 } 1128 pr_once_fw = false; 1129 1130 /* find vring */ 1131 if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 1132 /* in STA mode (ESS), all to same VRING */ 1133 vring = wil_find_tx_vring_sta(wil, skb); 1134 } else { /* direct communication, find matching VRING */ 1135 if (is_unicast_ether_addr(eth->h_dest)) 1136 vring = wil_find_tx_vring(wil, skb); 1137 else 1138 vring = wil_tx_bcast(wil, skb); 1139 } 1140 if (unlikely(!vring)) { 1141 wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 1142 goto drop; 1143 } 1144 /* set up vring entry */ 1145 rc = wil_tx_vring(wil, vring, skb); 1146 1147 /* do we still have enough room in the vring? */ 1148 if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 1149 netif_tx_stop_all_queues(wil_to_ndev(wil)); 1150 wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 1151 } 1152 1153 switch (rc) { 1154 case 0: 1155 /* statistics will be updated on the tx_complete */ 1156 dev_kfree_skb_any(skb); 1157 return NETDEV_TX_OK; 1158 case -ENOMEM: 1159 return NETDEV_TX_BUSY; 1160 default: 1161 break; /* goto drop; */ 1162 } 1163 drop: 1164 ndev->stats.tx_dropped++; 1165 dev_kfree_skb_any(skb); 1166 1167 return NET_XMIT_DROP; 1168 } 1169 1170 static inline bool wil_need_txstat(struct sk_buff *skb) 1171 { 1172 struct ethhdr *eth = (void *)skb->data; 1173 1174 return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1175 (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1176 } 1177 1178 static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1179 { 1180 if (unlikely(wil_need_txstat(skb))) 1181 skb_complete_wifi_ack(skb, acked); 1182 else 1183 acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1184 } 1185 1186 /** 1187 * Clean up transmitted skb's from the Tx VRING 1188 * 1189 * Return number of descriptors cleared 1190 * 1191 * Safe to call from IRQ 1192 */ 1193 int wil_tx_complete(struct wil6210_priv *wil, int ringid) 1194 { 1195 struct net_device *ndev = wil_to_ndev(wil); 1196 struct device *dev = wil_to_dev(wil); 1197 struct vring *vring = &wil->vring_tx[ringid]; 1198 struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1199 int done = 0; 1200 int cid = wil->vring2cid_tid[ringid][0]; 1201 struct wil_net_stats *stats = &wil->sta[cid].stats; 1202 volatile struct vring_tx_desc *_d; 1203 int used_before_complete; 1204 int used_new; 1205 1206 if (unlikely(!vring->va)) { 1207 wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1208 return 0; 1209 } 1210 1211 if (unlikely(!txdata->enabled)) { 1212 wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1213 return 0; 1214 } 1215 1216 wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 1217 1218 used_before_complete = wil_vring_used_tx(vring); 1219 1220 while (!wil_vring_is_empty(vring)) { 1221 int new_swtail; 1222 struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1223 /** 1224 * For the fragmented skb, HW will set DU bit only for the 1225 * last fragment. look for it 1226 */ 1227 int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1228 /* TODO: check we are not past head */ 1229 1230 _d = &vring->va[lf].tx; 1231 if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1232 break; 1233 1234 new_swtail = (lf + 1) % vring->size; 1235 while (vring->swtail != new_swtail) { 1236 struct vring_tx_desc dd, *d = ⅆ 1237 u16 dmalen; 1238 struct sk_buff *skb; 1239 1240 ctx = &vring->ctx[vring->swtail]; 1241 skb = ctx->skb; 1242 _d = &vring->va[vring->swtail].tx; 1243 1244 *d = *_d; 1245 1246 dmalen = le16_to_cpu(d->dma.length); 1247 trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 1248 d->dma.error); 1249 wil_dbg_txrx(wil, 1250 "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 1251 ringid, vring->swtail, dmalen, 1252 d->dma.status, d->dma.error); 1253 wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 1254 (const void *)d, sizeof(*d), false); 1255 1256 wil_txdesc_unmap(dev, d, ctx); 1257 1258 if (skb) { 1259 if (likely(d->dma.error == 0)) { 1260 ndev->stats.tx_packets++; 1261 stats->tx_packets++; 1262 ndev->stats.tx_bytes += skb->len; 1263 stats->tx_bytes += skb->len; 1264 } else { 1265 ndev->stats.tx_errors++; 1266 stats->tx_errors++; 1267 } 1268 wil_consume_skb(skb, d->dma.error == 0); 1269 } 1270 memset(ctx, 0, sizeof(*ctx)); 1271 /* There is no need to touch HW descriptor: 1272 * - ststus bit TX_DMA_STATUS_DU is set by design, 1273 * so hardware will not try to process this desc., 1274 * - rest of descriptor will be initialized on Tx. 1275 */ 1276 vring->swtail = wil_vring_next_tail(vring); 1277 done++; 1278 } 1279 } 1280 1281 /* performance monitoring */ 1282 used_new = wil_vring_used_tx(vring); 1283 if (wil_val_in_range(vring_idle_trsh, 1284 used_new, used_before_complete)) { 1285 wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 1286 ringid, used_before_complete, used_new); 1287 txdata->last_idle = get_cycles(); 1288 } 1289 1290 if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 1291 wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 1292 netif_tx_wake_all_queues(wil_to_ndev(wil)); 1293 } 1294 1295 return done; 1296 } 1297