2 * Copyright (c) 2012 Qualcomm Atheros, Inc.
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.
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.
17 #include <linux/kernel.h>
18 #include <linux/netdevice.h>
19 #include <linux/etherdevice.h>
20 #include <linux/hardirq.h>
21 #include <net/ieee80211_radiotap.h>
22 #include <linux/if_arp.h>
23 #include <linux/moduleparam.h>
29 static bool rtap_include_phy_info;
30 module_param(rtap_include_phy_info, bool, S_IRUGO);
31 MODULE_PARM_DESC(rtap_include_phy_info,
32 " Include PHY info in the radiotap header, default - no");
34 static inline int wil_vring_is_empty(struct vring *vring)
36 return vring->swhead == vring->swtail;
39 static inline u32 wil_vring_next_tail(struct vring *vring)
41 return (vring->swtail + 1) % vring->size;
44 static inline void wil_vring_advance_head(struct vring *vring, int n)
46 vring->swhead = (vring->swhead + n) % vring->size;
49 static inline int wil_vring_is_full(struct vring *vring)
51 return wil_vring_next_tail(vring) == vring->swhead;
54 * Available space in Tx Vring
56 static inline int wil_vring_avail_tx(struct vring *vring)
58 u32 swhead = vring->swhead;
59 u32 swtail = vring->swtail;
60 int used = (vring->size + swhead - swtail) % vring->size;
62 return vring->size - used - 1;
65 static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring)
67 struct device *dev = wil_to_dev(wil);
68 size_t sz = vring->size * sizeof(vring->va[0]);
71 BUILD_BUG_ON(sizeof(vring->va[0]) != 32);
75 vring->ctx = kzalloc(vring->size * sizeof(vring->ctx[0]), GFP_KERNEL);
81 * vring->va should be aligned on its size rounded up to power of 2
82 * This is granted by the dma_alloc_coherent
84 vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL);
86 wil_err(wil, "vring_alloc [%d] failed to alloc DMA mem\n",
92 /* initially, all descriptors are SW owned
93 * For Tx and Rx, ownership bit is at the same location, thus
96 for (i = 0; i < vring->size; i++) {
97 volatile struct vring_tx_desc *d = &(vring->va[i].tx);
98 d->dma.status = TX_DMA_STATUS_DU;
101 wil_dbg_misc(wil, "vring[%d] 0x%p:0x%016llx 0x%p\n", vring->size,
102 vring->va, (unsigned long long)vring->pa, vring->ctx);
107 static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
110 struct device *dev = wil_to_dev(wil);
111 size_t sz = vring->size * sizeof(vring->va[0]);
113 while (!wil_vring_is_empty(vring)) {
115 volatile struct vring_tx_desc *d =
116 &vring->va[vring->swtail].tx;
117 dma_addr_t pa = d->dma.addr_low |
118 ((u64)d->dma.addr_high << 32);
119 struct sk_buff *skb = vring->ctx[vring->swtail];
121 dma_unmap_single(dev, pa, d->dma.length,
123 dev_kfree_skb_any(skb);
124 vring->ctx[vring->swtail] = NULL;
126 dma_unmap_page(dev, pa, d->dma.length,
129 vring->swtail = wil_vring_next_tail(vring);
131 volatile struct vring_rx_desc *d =
132 &vring->va[vring->swtail].rx;
133 dma_addr_t pa = d->dma.addr_low |
134 ((u64)d->dma.addr_high << 32);
135 struct sk_buff *skb = vring->ctx[vring->swhead];
136 dma_unmap_single(dev, pa, d->dma.length,
139 wil_vring_advance_head(vring, 1);
142 dma_free_coherent(dev, sz, (void *)vring->va, vring->pa);
150 * Allocate one skb for Rx VRING
152 * Safe to call from IRQ
154 static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring,
157 struct device *dev = wil_to_dev(wil);
158 unsigned int sz = RX_BUF_LEN;
159 volatile struct vring_rx_desc *d = &(vring->va[i].rx);
163 struct sk_buff *skb = dev_alloc_skb(sz + headroom);
167 skb_reserve(skb, headroom);
170 pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE);
171 if (unlikely(dma_mapping_error(dev, pa))) {
176 d->dma.d0 = BIT(9) | RX_DMA_D0_CMD_DMA_IT;
177 d->dma.addr_low = lower_32_bits(pa);
178 d->dma.addr_high = (u16)upper_32_bits(pa);
179 /* ip_length don't care */
181 /* error don't care */
182 d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
190 * Adds radiotap header
192 * Any error indicated as "Bad FCS"
194 * Vendor data for 04:ce:14-1 (Wilocity-1) consists of:
195 * - Rx descriptor: 32 bytes
198 static void wil_rx_add_radiotap_header(struct wil6210_priv *wil,
200 volatile struct vring_rx_desc *d)
202 struct wireless_dev *wdev = wil->wdev;
203 struct wil6210_rtap {
204 struct ieee80211_radiotap_header rthdr;
205 /* fields should be in the order of bits in rthdr.it_present */
209 __le16 chnl_freq __aligned(2);
216 struct wil6210_rtap_vendor {
217 struct wil6210_rtap rtap;
219 u8 vendor_oui[3] __aligned(2);
224 struct wil6210_rtap_vendor *rtap_vendor;
225 int rtap_len = sizeof(struct wil6210_rtap);
226 int phy_length = 0; /* phy info header size, bytes */
227 static char phy_data[128];
228 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
230 if (rtap_include_phy_info) {
231 rtap_len = sizeof(*rtap_vendor) + sizeof(*d);
232 /* calculate additional length */
233 if (d->dma.status & RX_DMA_STATUS_PHY_INFO) {
235 * PHY info starts from 8-byte boundary
236 * there are 8-byte lines, last line may be partially
237 * written (HW bug), thus FW configures for last line
238 * to be excessive. Driver skips this last line.
240 int len = min_t(int, 8 + sizeof(phy_data),
241 wil_rxdesc_phy_length(d));
243 void *p = skb_tail_pointer(skb);
244 void *pa = PTR_ALIGN(p, 8);
245 if (skb_tailroom(skb) >= len + (pa - p)) {
246 phy_length = len - 8;
247 memcpy(phy_data, pa, phy_length);
251 rtap_len += phy_length;
254 if (skb_headroom(skb) < rtap_len &&
255 pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) {
256 wil_err(wil, "Unable to expand headrom to %d\n", rtap_len);
260 rtap_vendor = (void *)skb_push(skb, rtap_len);
261 memset(rtap_vendor, 0, rtap_len);
263 rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION;
264 rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len);
265 rtap_vendor->rtap.rthdr.it_present = cpu_to_le32(
266 (1 << IEEE80211_RADIOTAP_FLAGS) |
267 (1 << IEEE80211_RADIOTAP_CHANNEL) |
268 (1 << IEEE80211_RADIOTAP_MCS));
269 if (d->dma.status & RX_DMA_STATUS_ERROR)
270 rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS;
272 rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320);
273 rtap_vendor->rtap.chnl_flags = cpu_to_le16(0);
275 rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS;
276 rtap_vendor->rtap.mcs_flags = 0;
277 rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d);
279 if (rtap_include_phy_info) {
280 rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 <<
281 IEEE80211_RADIOTAP_VENDOR_NAMESPACE);
282 /* OUI for Wilocity 04:ce:14 */
283 rtap_vendor->vendor_oui[0] = 0x04;
284 rtap_vendor->vendor_oui[1] = 0xce;
285 rtap_vendor->vendor_oui[2] = 0x14;
286 rtap_vendor->vendor_ns = 1;
287 /* Rx descriptor + PHY data */
288 rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) +
290 memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d));
291 memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data,
297 * Fast swap in place between 2 registers
299 static void wil_swap_u16(u16 *a, u16 *b)
306 static void wil_swap_ethaddr(void *data)
308 struct ethhdr *eth = data;
309 u16 *s = (u16 *)eth->h_source;
310 u16 *d = (u16 *)eth->h_dest;
312 wil_swap_u16(s++, d++);
313 wil_swap_u16(s++, d++);
318 * reap 1 frame from @swhead
320 * Safe to call from IRQ
322 static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
325 struct device *dev = wil_to_dev(wil);
326 struct net_device *ndev = wil_to_ndev(wil);
327 volatile struct vring_rx_desc *d;
330 unsigned int sz = RX_BUF_LEN;
334 if (wil_vring_is_empty(vring))
337 d = &(vring->va[vring->swhead].rx);
338 if (!(d->dma.status & RX_DMA_STATUS_DU)) {
339 /* it is not error, we just reached end of Rx done area */
343 pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
344 skb = vring->ctx[vring->swhead];
345 dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE);
346 skb_trim(skb, d->dma.length);
348 wil->stats.last_mcs_rx = wil_rxdesc_mcs(d);
350 /* use radiotap header only if required */
351 if (ndev->type == ARPHRD_IEEE80211_RADIOTAP)
352 wil_rx_add_radiotap_header(wil, skb, d);
354 wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead, d->dma.length);
355 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4,
356 (const void *)d, sizeof(*d), false);
358 wil_vring_advance_head(vring, 1);
360 /* no extra checks if in sniffer mode */
361 if (ndev->type != ARPHRD_ETHER)
364 * Non-data frames may be delivered through Rx DMA channel (ex: BAR)
365 * Driver should recognize it by frame type, that is found
366 * in Rx descriptor. If type is not data, it is 802.11 frame as is
368 ftype = wil_rxdesc_ftype(d) << 2;
369 if (ftype != IEEE80211_FTYPE_DATA) {
370 wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype);
371 /* TODO: process it */
376 if (skb->len < ETH_HLEN) {
377 wil_err(wil, "Short frame, len = %d\n", skb->len);
378 /* TODO: process it (i.e. BAR) */
383 ds_bits = wil_rxdesc_ds_bits(d);
386 * HW bug - in ToDS mode, i.e. Rx on AP side,
387 * addresses get swapped
389 wil_swap_ethaddr(skb->data);
396 * allocate and fill up to @count buffers in rx ring
397 * buffers posted at @swtail
399 static int wil_rx_refill(struct wil6210_priv *wil, int count)
401 struct net_device *ndev = wil_to_ndev(wil);
402 struct vring *v = &wil->vring_rx;
405 int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ?
406 WIL6210_RTAP_SIZE : 0;
408 for (; next_tail = wil_vring_next_tail(v),
409 (next_tail != v->swhead) && (count-- > 0);
410 v->swtail = next_tail) {
411 rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom);
413 wil_err(wil, "Error %d in wil_rx_refill[%d]\n",
418 iowrite32(v->swtail, wil->csr + HOSTADDR(v->hwtail));
424 * Pass Rx packet to the netif. Update statistics.
426 static void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev)
429 unsigned int len = skb->len;
436 rc = netif_rx_ni(skb);
438 if (likely(rc == NET_RX_SUCCESS)) {
439 ndev->stats.rx_packets++;
440 ndev->stats.rx_bytes += len;
443 ndev->stats.rx_dropped++;
448 * Proceed all completed skb's from Rx VRING
450 * Safe to call from IRQ
452 void wil_rx_handle(struct wil6210_priv *wil)
454 struct net_device *ndev = wil_to_ndev(wil);
455 struct vring *v = &wil->vring_rx;
459 wil_err(wil, "Rx IRQ while Rx not yet initialized\n");
462 wil_dbg_txrx(wil, "%s()\n", __func__);
463 while (NULL != (skb = wil_vring_reap_rx(wil, v))) {
464 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
465 skb->data, skb_headlen(skb), false);
467 if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
469 skb_reset_mac_header(skb);
470 skb->ip_summed = CHECKSUM_UNNECESSARY;
471 skb->pkt_type = PACKET_OTHERHOST;
472 skb->protocol = htons(ETH_P_802_2);
475 skb->protocol = eth_type_trans(skb, ndev);
478 wil_netif_rx_any(skb, ndev);
480 wil_rx_refill(wil, v->size);
483 int wil_rx_init(struct wil6210_priv *wil)
485 struct vring *vring = &wil->vring_rx;
488 vring->size = WIL6210_RX_RING_SIZE;
489 rc = wil_vring_alloc(wil, vring);
493 rc = wmi_rx_chain_add(wil, vring);
497 rc = wil_rx_refill(wil, vring->size);
503 wil_vring_free(wil, vring, 0);
508 void wil_rx_fini(struct wil6210_priv *wil)
510 struct vring *vring = &wil->vring_rx;
513 wil_vring_free(wil, vring, 0);
516 int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size,
520 struct wmi_vring_cfg_cmd cmd = {
521 .action = cpu_to_le32(WMI_VRING_CMD_ADD),
524 .max_mpdu_size = cpu_to_le16(TX_BUF_LEN),
527 .cidxtid = (cid & 0xf) | ((tid & 0xf) << 4),
528 .encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
533 .priority = cpu_to_le16(0),
534 .timeslot_us = cpu_to_le16(0xfff),
539 struct wil6210_mbox_hdr_wmi wmi;
540 struct wmi_vring_cfg_done_event cmd;
542 struct vring *vring = &wil->vring_tx[id];
545 wil_err(wil, "Tx ring [%d] already allocated\n", id);
551 rc = wil_vring_alloc(wil, vring);
555 cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa);
556 cmd.vring_cfg.tx_sw_ring.ring_size = cpu_to_le16(vring->size);
558 rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd),
559 WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100);
563 if (reply.cmd.status != WMI_VRING_CFG_SUCCESS) {
564 wil_err(wil, "Tx config failed, status 0x%02x\n",
569 vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr);
573 wil_vring_free(wil, vring, 1);
579 void wil_vring_fini_tx(struct wil6210_priv *wil, int id)
581 struct vring *vring = &wil->vring_tx[id];
586 wil_vring_free(wil, vring, 1);
589 static struct vring *wil_find_tx_vring(struct wil6210_priv *wil,
592 struct vring *v = &wil->vring_tx[0];
600 static int wil_tx_desc_map(volatile struct vring_tx_desc *d,
601 dma_addr_t pa, u32 len)
603 d->dma.addr_low = lower_32_bits(pa);
604 d->dma.addr_high = (u16)upper_32_bits(pa);
605 d->dma.ip_length = 0;
606 /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/
607 d->dma.b11 = 0/*14 | BIT(7)*/;
609 d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
615 d->mac.ucode_cmd = 0;
616 /* use dst index 0 */
617 d->mac.d[1] |= BIT(MAC_CFG_DESC_TX_1_DST_INDEX_EN_POS) |
618 (0 << MAC_CFG_DESC_TX_1_DST_INDEX_POS);
619 /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */
620 d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) |
621 (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS);
626 static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
629 struct device *dev = wil_to_dev(wil);
630 volatile struct vring_tx_desc *d;
631 u32 swhead = vring->swhead;
632 int avail = wil_vring_avail_tx(vring);
633 int nr_frags = skb_shinfo(skb)->nr_frags;
635 int vring_index = vring - wil->vring_tx;
639 wil_dbg_txrx(wil, "%s()\n", __func__);
641 if (avail < vring->size/8)
642 netif_tx_stop_all_queues(wil_to_ndev(wil));
643 if (avail < 1 + nr_frags) {
644 wil_err(wil, "Tx ring full. No space for %d fragments\n",
648 d = &(vring->va[i].tx);
650 /* FIXME FW can accept only unicast frames for the peer */
651 memcpy(skb->data, wil->dst_addr[vring_index], ETH_ALEN);
653 pa = dma_map_single(dev, skb->data,
654 skb_headlen(skb), DMA_TO_DEVICE);
656 wil_dbg_txrx(wil, "Tx skb %d bytes %p -> %#08llx\n", skb_headlen(skb),
657 skb->data, (unsigned long long)pa);
658 wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1,
659 skb->data, skb_headlen(skb), false);
661 if (unlikely(dma_mapping_error(dev, pa)))
664 wil_tx_desc_map(d, pa, skb_headlen(skb));
665 d->mac.d[2] |= ((nr_frags + 1) <<
666 MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS);
667 /* middle segments */
668 for (f = 0; f < nr_frags; f++) {
669 const struct skb_frag_struct *frag =
670 &skb_shinfo(skb)->frags[f];
671 int len = skb_frag_size(frag);
672 i = (swhead + f + 1) % vring->size;
673 d = &(vring->va[i].tx);
674 pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
676 if (unlikely(dma_mapping_error(dev, pa)))
678 wil_tx_desc_map(d, pa, len);
679 vring->ctx[i] = NULL;
681 /* for the last seg only */
682 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS);
683 d->dma.d0 |= BIT(9); /* BUG: undocumented bit */
684 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS);
685 d->dma.d0 |= (vring_index << DMA_CFG_DESC_TX_0_QID_POS);
687 wil_hex_dump_txrx("Tx ", DUMP_PREFIX_NONE, 32, 4,
688 (const void *)d, sizeof(*d), false);
691 wil_vring_advance_head(vring, nr_frags + 1);
692 wil_dbg_txrx(wil, "Tx swhead %d -> %d\n", swhead, vring->swhead);
693 iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail));
694 /* hold reference to skb
695 * to prevent skb release before accounting
696 * in case of immediate "tx done"
698 vring->ctx[i] = skb_get(skb);
702 /* unmap what we have mapped */
703 /* Note: increment @f to operate with positive index */
704 for (f++; f > 0; f--) {
705 i = (swhead + f) % vring->size;
706 d = &(vring->va[i].tx);
707 d->dma.status = TX_DMA_STATUS_DU;
708 pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
710 dma_unmap_single(dev, pa, d->dma.length, DMA_TO_DEVICE);
712 dma_unmap_page(dev, pa, d->dma.length, DMA_TO_DEVICE);
719 netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev)
721 struct wil6210_priv *wil = ndev_to_wil(ndev);
725 wil_dbg_txrx(wil, "%s()\n", __func__);
726 if (!test_bit(wil_status_fwready, &wil->status)) {
727 wil_err(wil, "FW not ready\n");
730 if (!test_bit(wil_status_fwconnected, &wil->status)) {
731 wil_err(wil, "FW not connected\n");
734 if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
735 wil_err(wil, "Xmit in monitor mode not supported\n");
738 if (skb->protocol == cpu_to_be16(ETH_P_PAE)) {
739 rc = wmi_tx_eapol(wil, skb);
742 vring = wil_find_tx_vring(wil, skb);
744 wil_err(wil, "No Tx VRING available\n");
747 /* set up vring entry */
748 rc = wil_tx_vring(wil, vring, skb);
752 /* statistics will be updated on the tx_complete */
753 dev_kfree_skb_any(skb);
756 return NETDEV_TX_BUSY;
758 break; /* goto drop; */
761 netif_tx_stop_all_queues(ndev);
762 ndev->stats.tx_dropped++;
763 dev_kfree_skb_any(skb);
765 return NET_XMIT_DROP;
769 * Clean up transmitted skb's from the Tx VRING
771 * Safe to call from IRQ
773 void wil_tx_complete(struct wil6210_priv *wil, int ringid)
775 struct net_device *ndev = wil_to_ndev(wil);
776 struct device *dev = wil_to_dev(wil);
777 struct vring *vring = &wil->vring_tx[ringid];
780 wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid);
784 wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid);
786 while (!wil_vring_is_empty(vring)) {
787 volatile struct vring_tx_desc *d = &vring->va[vring->swtail].tx;
790 if (!(d->dma.status & TX_DMA_STATUS_DU))
794 "Tx[%3d] : %d bytes, status 0x%02x err 0x%02x\n",
795 vring->swtail, d->dma.length, d->dma.status,
797 wil_hex_dump_txrx("TxC ", DUMP_PREFIX_NONE, 32, 4,
798 (const void *)d, sizeof(*d), false);
800 pa = d->dma.addr_low | ((u64)d->dma.addr_high << 32);
801 skb = vring->ctx[vring->swtail];
803 if (d->dma.error == 0) {
804 ndev->stats.tx_packets++;
805 ndev->stats.tx_bytes += skb->len;
807 ndev->stats.tx_errors++;
810 dma_unmap_single(dev, pa, d->dma.length, DMA_TO_DEVICE);
811 dev_kfree_skb_any(skb);
812 vring->ctx[vring->swtail] = NULL;
814 dma_unmap_page(dev, pa, d->dma.length, DMA_TO_DEVICE);
817 d->dma.addr_high = 0;
819 d->dma.status = TX_DMA_STATUS_DU;
820 vring->swtail = wil_vring_next_tail(vring);
822 if (wil_vring_avail_tx(vring) > vring->size/4)
823 netif_tx_wake_all_queues(wil_to_ndev(wil));