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/etherdevice.h>
18 #include <net/ieee80211_radiotap.h>
19 #include <linux/if_arp.h>
20 #include <linux/moduleparam.h>
27 static bool rtap_include_phy_info;
28 module_param(rtap_include_phy_info, bool, S_IRUGO);
29 MODULE_PARM_DESC(rtap_include_phy_info,
30 " Include PHY info in the radiotap header, default - no");
32 static inline int wil_vring_is_empty(struct vring *vring)
34 return vring->swhead == vring->swtail;
37 static inline u32 wil_vring_next_tail(struct vring *vring)
39 return (vring->swtail + 1) % vring->size;
42 static inline void wil_vring_advance_head(struct vring *vring, int n)
44 vring->swhead = (vring->swhead + n) % vring->size;
47 static inline int wil_vring_is_full(struct vring *vring)
49 return wil_vring_next_tail(vring) == vring->swhead;
52 * Available space in Tx Vring
54 static inline int wil_vring_avail_tx(struct vring *vring)
56 u32 swhead = vring->swhead;
57 u32 swtail = vring->swtail;
58 int used = (vring->size + swhead - swtail) % vring->size;
60 return vring->size - used - 1;
63 static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring)
65 struct device *dev = wil_to_dev(wil);
66 size_t sz = vring->size * sizeof(vring->va[0]);
69 BUILD_BUG_ON(sizeof(vring->va[0]) != 32);
73 vring->ctx = kzalloc(vring->size * sizeof(vring->ctx[0]), GFP_KERNEL);
79 * vring->va should be aligned on its size rounded up to power of 2
80 * This is granted by the dma_alloc_coherent
82 vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL);
88 /* initially, all descriptors are SW owned
89 * For Tx and Rx, ownership bit is at the same location, thus
92 for (i = 0; i < vring->size; i++) {
93 volatile struct vring_tx_desc *_d = &(vring->va[i].tx);
94 _d->dma.status = TX_DMA_STATUS_DU;
97 wil_dbg_misc(wil, "vring[%d] 0x%p:0x%016llx 0x%p\n", vring->size,
98 vring->va, (unsigned long long)vring->pa, vring->ctx);
103 static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
106 struct device *dev = wil_to_dev(wil);
107 size_t sz = vring->size * sizeof(vring->va[0]);
109 while (!wil_vring_is_empty(vring)) {
115 struct vring_tx_desc dd, *d = ⅆ
116 volatile struct vring_tx_desc *_d =
117 &vring->va[vring->swtail].tx;
120 pa = wil_desc_addr(&d->dma.addr);
121 dmalen = le16_to_cpu(d->dma.length);
122 skb = vring->ctx[vring->swtail];
124 dma_unmap_single(dev, pa, dmalen,
126 dev_kfree_skb_any(skb);
127 vring->ctx[vring->swtail] = NULL;
129 dma_unmap_page(dev, pa, dmalen,
132 vring->swtail = wil_vring_next_tail(vring);
134 struct vring_rx_desc dd, *d = ⅆ
135 volatile struct vring_rx_desc *_d =
136 &vring->va[vring->swtail].rx;
139 pa = wil_desc_addr(&d->dma.addr);
140 dmalen = le16_to_cpu(d->dma.length);
141 skb = vring->ctx[vring->swhead];
142 dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE);
144 wil_vring_advance_head(vring, 1);
147 dma_free_coherent(dev, sz, (void *)vring->va, vring->pa);
155 * Allocate one skb for Rx VRING
157 * Safe to call from IRQ
159 static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring,
162 struct device *dev = wil_to_dev(wil);
163 unsigned int sz = RX_BUF_LEN;
164 struct vring_rx_desc dd, *d = ⅆ
165 volatile struct vring_rx_desc *_d = &(vring->va[i].rx);
169 struct sk_buff *skb = dev_alloc_skb(sz + headroom);
173 skb_reserve(skb, headroom);
176 pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE);
177 if (unlikely(dma_mapping_error(dev, pa))) {
182 d->dma.d0 = BIT(9) | RX_DMA_D0_CMD_DMA_IT;
183 wil_desc_addr_set(&d->dma.addr, pa);
184 /* ip_length don't care */
186 /* error don't care */
187 d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
188 d->dma.length = cpu_to_le16(sz);
196 * Adds radiotap header
198 * Any error indicated as "Bad FCS"
200 * Vendor data for 04:ce:14-1 (Wilocity-1) consists of:
201 * - Rx descriptor: 32 bytes
204 static void wil_rx_add_radiotap_header(struct wil6210_priv *wil,
207 struct wireless_dev *wdev = wil->wdev;
208 struct wil6210_rtap {
209 struct ieee80211_radiotap_header rthdr;
210 /* fields should be in the order of bits in rthdr.it_present */
214 __le16 chnl_freq __aligned(2);
221 struct wil6210_rtap_vendor {
222 struct wil6210_rtap rtap;
224 u8 vendor_oui[3] __aligned(2);
229 struct vring_rx_desc *d = wil_skb_rxdesc(skb);
230 struct wil6210_rtap_vendor *rtap_vendor;
231 int rtap_len = sizeof(struct wil6210_rtap);
232 int phy_length = 0; /* phy info header size, bytes */
233 static char phy_data[128];
234 struct ieee80211_channel *ch = wdev->preset_chandef.chan;
236 if (rtap_include_phy_info) {
237 rtap_len = sizeof(*rtap_vendor) + sizeof(*d);
238 /* calculate additional length */
239 if (d->dma.status & RX_DMA_STATUS_PHY_INFO) {
241 * PHY info starts from 8-byte boundary
242 * there are 8-byte lines, last line may be partially
243 * written (HW bug), thus FW configures for last line
244 * to be excessive. Driver skips this last line.
246 int len = min_t(int, 8 + sizeof(phy_data),
247 wil_rxdesc_phy_length(d));
249 void *p = skb_tail_pointer(skb);
250 void *pa = PTR_ALIGN(p, 8);
251 if (skb_tailroom(skb) >= len + (pa - p)) {
252 phy_length = len - 8;
253 memcpy(phy_data, pa, phy_length);
257 rtap_len += phy_length;
260 if (skb_headroom(skb) < rtap_len &&
261 pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) {
262 wil_err(wil, "Unable to expand headrom to %d\n", rtap_len);
266 rtap_vendor = (void *)skb_push(skb, rtap_len);
267 memset(rtap_vendor, 0, rtap_len);
269 rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION;
270 rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len);
271 rtap_vendor->rtap.rthdr.it_present = cpu_to_le32(
272 (1 << IEEE80211_RADIOTAP_FLAGS) |
273 (1 << IEEE80211_RADIOTAP_CHANNEL) |
274 (1 << IEEE80211_RADIOTAP_MCS));
275 if (d->dma.status & RX_DMA_STATUS_ERROR)
276 rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS;
278 rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320);
279 rtap_vendor->rtap.chnl_flags = cpu_to_le16(0);
281 rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS;
282 rtap_vendor->rtap.mcs_flags = 0;
283 rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d);
285 if (rtap_include_phy_info) {
286 rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 <<
287 IEEE80211_RADIOTAP_VENDOR_NAMESPACE);
288 /* OUI for Wilocity 04:ce:14 */
289 rtap_vendor->vendor_oui[0] = 0x04;
290 rtap_vendor->vendor_oui[1] = 0xce;
291 rtap_vendor->vendor_oui[2] = 0x14;
292 rtap_vendor->vendor_ns = 1;
293 /* Rx descriptor + PHY data */
294 rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) +
296 memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d));
297 memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data,
303 * Fast swap in place between 2 registers
305 static void wil_swap_u16(u16 *a, u16 *b)
312 static void wil_swap_ethaddr(void *data)
314 struct ethhdr *eth = data;
315 u16 *s = (u16 *)eth->h_source;
316 u16 *d = (u16 *)eth->h_dest;
318 wil_swap_u16(s++, d++);
319 wil_swap_u16(s++, d++);
324 * reap 1 frame from @swhead
326 * Rx descriptor copied to skb->cb
328 * Safe to call from IRQ
330 static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
333 struct device *dev = wil_to_dev(wil);
334 struct net_device *ndev = wil_to_ndev(wil);
335 volatile struct vring_rx_desc *_d;
336 struct vring_rx_desc *d;
339 unsigned int sz = RX_BUF_LEN;
344 BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb));
346 if (wil_vring_is_empty(vring))
349 _d = &(vring->va[vring->swhead].rx);
350 if (!(_d->dma.status & RX_DMA_STATUS_DU)) {
351 /* it is not error, we just reached end of Rx done area */
355 skb = vring->ctx[vring->swhead];
356 d = wil_skb_rxdesc(skb);
358 pa = wil_desc_addr(&d->dma.addr);
359 vring->ctx[vring->swhead] = NULL;
360 wil_vring_advance_head(vring, 1);
362 dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE);
363 dmalen = le16_to_cpu(d->dma.length);
365 trace_wil6210_rx(vring->swhead, d);
366 wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead, dmalen);
367 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4,
368 (const void *)d, sizeof(*d), false);
371 wil_err(wil, "Rx size too large: %d bytes!\n", dmalen);
375 skb_trim(skb, dmalen);
377 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
378 skb->data, skb_headlen(skb), false);
381 wil->stats.last_mcs_rx = wil_rxdesc_mcs(d);
383 /* use radiotap header only if required */
384 if (ndev->type == ARPHRD_IEEE80211_RADIOTAP)
385 wil_rx_add_radiotap_header(wil, skb);
387 /* no extra checks if in sniffer mode */
388 if (ndev->type != ARPHRD_ETHER)
391 * Non-data frames may be delivered through Rx DMA channel (ex: BAR)
392 * Driver should recognize it by frame type, that is found
393 * in Rx descriptor. If type is not data, it is 802.11 frame as is
395 ftype = wil_rxdesc_ftype(d) << 2;
396 if (ftype != IEEE80211_FTYPE_DATA) {
397 wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype);
398 /* TODO: process it */
403 if (skb->len < ETH_HLEN) {
404 wil_err(wil, "Short frame, len = %d\n", skb->len);
405 /* TODO: process it (i.e. BAR) */
410 ds_bits = wil_rxdesc_ds_bits(d);
413 * HW bug - in ToDS mode, i.e. Rx on AP side,
414 * addresses get swapped
416 wil_swap_ethaddr(skb->data);
423 * allocate and fill up to @count buffers in rx ring
424 * buffers posted at @swtail
426 static int wil_rx_refill(struct wil6210_priv *wil, int count)
428 struct net_device *ndev = wil_to_ndev(wil);
429 struct vring *v = &wil->vring_rx;
432 int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ?
433 WIL6210_RTAP_SIZE : 0;
435 for (; next_tail = wil_vring_next_tail(v),
436 (next_tail != v->swhead) && (count-- > 0);
437 v->swtail = next_tail) {
438 rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom);
440 wil_err(wil, "Error %d in wil_rx_refill[%d]\n",
445 iowrite32(v->swtail, wil->csr + HOSTADDR(v->hwtail));
451 * Pass Rx packet to the netif. Update statistics.
452 * Called in softirq context (NAPI poll).
454 static void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev)
457 unsigned int len = skb->len;
461 rc = netif_receive_skb(skb);
463 if (likely(rc == NET_RX_SUCCESS)) {
464 ndev->stats.rx_packets++;
465 ndev->stats.rx_bytes += len;
468 ndev->stats.rx_dropped++;
473 * Proceed all completed skb's from Rx VRING
475 * Safe to call from NAPI poll, i.e. softirq with interrupts enabled
477 void wil_rx_handle(struct wil6210_priv *wil, int *quota)
479 struct net_device *ndev = wil_to_ndev(wil);
480 struct vring *v = &wil->vring_rx;
484 wil_err(wil, "Rx IRQ while Rx not yet initialized\n");
487 wil_dbg_txrx(wil, "%s()\n", __func__);
488 while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) {
491 if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
493 skb_reset_mac_header(skb);
494 skb->ip_summed = CHECKSUM_UNNECESSARY;
495 skb->pkt_type = PACKET_OTHERHOST;
496 skb->protocol = htons(ETH_P_802_2);
499 skb->protocol = eth_type_trans(skb, ndev);
502 wil_netif_rx_any(skb, ndev);
504 wil_rx_refill(wil, v->size);
507 int wil_rx_init(struct wil6210_priv *wil)
509 struct vring *vring = &wil->vring_rx;
512 vring->size = WIL6210_RX_RING_SIZE;
513 rc = wil_vring_alloc(wil, vring);
517 rc = wmi_rx_chain_add(wil, vring);
521 rc = wil_rx_refill(wil, vring->size);
527 wil_vring_free(wil, vring, 0);
532 void wil_rx_fini(struct wil6210_priv *wil)
534 struct vring *vring = &wil->vring_rx;
537 wil_vring_free(wil, vring, 0);
540 int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size,
544 struct wmi_vring_cfg_cmd cmd = {
545 .action = cpu_to_le32(WMI_VRING_CMD_ADD),
548 .max_mpdu_size = cpu_to_le16(TX_BUF_LEN),
549 .ring_size = cpu_to_le16(size),
552 .cidxtid = (cid & 0xf) | ((tid & 0xf) << 4),
553 .encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
558 .priority = cpu_to_le16(0),
559 .timeslot_us = cpu_to_le16(0xfff),
564 struct wil6210_mbox_hdr_wmi wmi;
565 struct wmi_vring_cfg_done_event cmd;
567 struct vring *vring = &wil->vring_tx[id];
570 wil_err(wil, "Tx ring [%d] already allocated\n", id);
576 rc = wil_vring_alloc(wil, vring);
580 cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa);
582 rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd),
583 WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100);
587 if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) {
588 wil_err(wil, "Tx config failed, status 0x%02x\n",
593 vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr);
597 wil_vring_free(wil, vring, 1);
603 void wil_vring_fini_tx(struct wil6210_priv *wil, int id)
605 struct vring *vring = &wil->vring_tx[id];
610 wil_vring_free(wil, vring, 1);
613 static struct vring *wil_find_tx_vring(struct wil6210_priv *wil,
616 struct vring *v = &wil->vring_tx[0];
624 static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len,
627 wil_desc_addr_set(&d->dma.addr, pa);
628 d->dma.ip_length = 0;
629 /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/
630 d->dma.b11 = 0/*14 | BIT(7)*/;
632 d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
633 d->dma.length = cpu_to_le16((u16)len);
634 d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS);
638 d->mac.ucode_cmd = 0;
639 /* use dst index 0 */
640 d->mac.d[1] |= BIT(MAC_CFG_DESC_TX_1_DST_INDEX_EN_POS) |
641 (0 << MAC_CFG_DESC_TX_1_DST_INDEX_POS);
642 /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */
643 d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) |
644 (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS);
649 static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
652 struct device *dev = wil_to_dev(wil);
653 struct vring_tx_desc dd, *d = ⅆ
654 volatile struct vring_tx_desc *_d;
655 u32 swhead = vring->swhead;
656 int avail = wil_vring_avail_tx(vring);
657 int nr_frags = skb_shinfo(skb)->nr_frags;
659 int vring_index = vring - wil->vring_tx;
663 wil_dbg_txrx(wil, "%s()\n", __func__);
665 if (avail < vring->size/8)
666 netif_tx_stop_all_queues(wil_to_ndev(wil));
667 if (avail < 1 + nr_frags) {
668 wil_err(wil, "Tx ring full. No space for %d fragments\n",
672 _d = &(vring->va[i].tx);
674 /* FIXME FW can accept only unicast frames for the peer */
675 memcpy(skb->data, wil->dst_addr[vring_index], ETH_ALEN);
677 pa = dma_map_single(dev, skb->data,
678 skb_headlen(skb), DMA_TO_DEVICE);
680 wil_dbg_txrx(wil, "Tx skb %d bytes %p -> %#08llx\n", skb_headlen(skb),
681 skb->data, (unsigned long long)pa);
682 wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1,
683 skb->data, skb_headlen(skb), false);
685 if (unlikely(dma_mapping_error(dev, pa)))
688 wil_tx_desc_map(d, pa, skb_headlen(skb), vring_index);
689 d->mac.d[2] |= ((nr_frags + 1) <<
690 MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS);
694 /* middle segments */
695 for (f = 0; f < nr_frags; f++) {
696 const struct skb_frag_struct *frag =
697 &skb_shinfo(skb)->frags[f];
698 int len = skb_frag_size(frag);
699 i = (swhead + f + 1) % vring->size;
700 _d = &(vring->va[i].tx);
701 pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
703 if (unlikely(dma_mapping_error(dev, pa)))
705 wil_tx_desc_map(d, pa, len, vring_index);
706 vring->ctx[i] = NULL;
709 /* for the last seg only */
710 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS);
711 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS);
712 d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS);
715 wil_hex_dump_txrx("Tx ", DUMP_PREFIX_NONE, 32, 4,
716 (const void *)d, sizeof(*d), false);
719 wil_vring_advance_head(vring, nr_frags + 1);
720 wil_dbg_txrx(wil, "Tx swhead %d -> %d\n", swhead, vring->swhead);
721 trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags);
722 iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail));
723 /* hold reference to skb
724 * to prevent skb release before accounting
725 * in case of immediate "tx done"
727 vring->ctx[i] = skb_get(skb);
731 /* unmap what we have mapped */
732 /* Note: increment @f to operate with positive index */
733 for (f++; f > 0; f--) {
736 i = (swhead + f) % vring->size;
737 _d = &(vring->va[i].tx);
739 _d->dma.status = TX_DMA_STATUS_DU;
740 pa = wil_desc_addr(&d->dma.addr);
741 dmalen = le16_to_cpu(d->dma.length);
743 dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
745 dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
752 netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev)
754 struct wil6210_priv *wil = ndev_to_wil(ndev);
758 wil_dbg_txrx(wil, "%s()\n", __func__);
759 if (!test_bit(wil_status_fwready, &wil->status)) {
760 wil_err(wil, "FW not ready\n");
763 if (!test_bit(wil_status_fwconnected, &wil->status)) {
764 wil_err(wil, "FW not connected\n");
767 if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
768 wil_err(wil, "Xmit in monitor mode not supported\n");
773 vring = wil_find_tx_vring(wil, skb);
775 wil_err(wil, "No Tx VRING available\n");
778 /* set up vring entry */
779 rc = wil_tx_vring(wil, vring, skb);
783 /* statistics will be updated on the tx_complete */
784 dev_kfree_skb_any(skb);
787 return NETDEV_TX_BUSY;
789 break; /* goto drop; */
792 ndev->stats.tx_dropped++;
793 dev_kfree_skb_any(skb);
795 return NET_XMIT_DROP;
799 * Clean up transmitted skb's from the Tx VRING
801 * Return number of descriptors cleared
803 * Safe to call from IRQ
805 int wil_tx_complete(struct wil6210_priv *wil, int ringid)
807 struct net_device *ndev = wil_to_ndev(wil);
808 struct device *dev = wil_to_dev(wil);
809 struct vring *vring = &wil->vring_tx[ringid];
813 wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid);
817 wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid);
819 while (!wil_vring_is_empty(vring)) {
820 volatile struct vring_tx_desc *_d =
821 &vring->va[vring->swtail].tx;
822 struct vring_tx_desc dd, *d = ⅆ
829 if (!(d->dma.status & TX_DMA_STATUS_DU))
832 dmalen = le16_to_cpu(d->dma.length);
833 trace_wil6210_tx_done(ringid, vring->swtail, dmalen,
836 "Tx[%3d] : %d bytes, status 0x%02x err 0x%02x\n",
837 vring->swtail, dmalen, d->dma.status,
839 wil_hex_dump_txrx("TxC ", DUMP_PREFIX_NONE, 32, 4,
840 (const void *)d, sizeof(*d), false);
842 pa = wil_desc_addr(&d->dma.addr);
843 skb = vring->ctx[vring->swtail];
845 if (d->dma.error == 0) {
846 ndev->stats.tx_packets++;
847 ndev->stats.tx_bytes += skb->len;
849 ndev->stats.tx_errors++;
852 dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
853 dev_kfree_skb_any(skb);
854 vring->ctx[vring->swtail] = NULL;
856 dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
858 d->dma.addr.addr_low = 0;
859 d->dma.addr.addr_high = 0;
861 d->dma.status = TX_DMA_STATUS_DU;
862 vring->swtail = wil_vring_next_tail(vring);
865 if (wil_vring_avail_tx(vring) > vring->size/4)
866 netif_tx_wake_all_queues(wil_to_ndev(wil));