brcm80211: Add support for brcm4371
[firefly-linux-kernel-4.4.55.git] / drivers / net / wireless / ath / wil6210 / txrx.c
1 /*
2  * Copyright (c) 2012-2015 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 bool rx_align_2;
37 module_param(rx_align_2, bool, S_IRUGO);
38 MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no");
39
40 static inline uint wil_rx_snaplen(void)
41 {
42         return rx_align_2 ? 6 : 0;
43 }
44
45 static inline int wil_vring_is_empty(struct vring *vring)
46 {
47         return vring->swhead == vring->swtail;
48 }
49
50 static inline u32 wil_vring_next_tail(struct vring *vring)
51 {
52         return (vring->swtail + 1) % vring->size;
53 }
54
55 static inline void wil_vring_advance_head(struct vring *vring, int n)
56 {
57         vring->swhead = (vring->swhead + n) % vring->size;
58 }
59
60 static inline int wil_vring_is_full(struct vring *vring)
61 {
62         return wil_vring_next_tail(vring) == vring->swhead;
63 }
64
65 /* Used space in Tx Vring */
66 static inline int wil_vring_used_tx(struct vring *vring)
67 {
68         u32 swhead = vring->swhead;
69         u32 swtail = vring->swtail;
70         return (vring->size + swhead - swtail) % vring->size;
71 }
72
73 /* Available space in Tx Vring */
74 static inline int wil_vring_avail_tx(struct vring *vring)
75 {
76         return vring->size - wil_vring_used_tx(vring) - 1;
77 }
78
79 /* wil_vring_wmark_low - low watermark for available descriptor space */
80 static inline int wil_vring_wmark_low(struct vring *vring)
81 {
82         return vring->size/8;
83 }
84
85 /* wil_vring_wmark_high - high watermark for available descriptor space */
86 static inline int wil_vring_wmark_high(struct vring *vring)
87 {
88         return vring->size/4;
89 }
90
91 /* wil_val_in_range - check if value in [min,max) */
92 static inline bool wil_val_in_range(int val, int min, int max)
93 {
94         return val >= min && val < max;
95 }
96
97 static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring)
98 {
99         struct device *dev = wil_to_dev(wil);
100         size_t sz = vring->size * sizeof(vring->va[0]);
101         uint i;
102
103         wil_dbg_misc(wil, "%s()\n", __func__);
104
105         BUILD_BUG_ON(sizeof(vring->va[0]) != 32);
106
107         vring->swhead = 0;
108         vring->swtail = 0;
109         vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL);
110         if (!vring->ctx) {
111                 vring->va = NULL;
112                 return -ENOMEM;
113         }
114         /* vring->va should be aligned on its size rounded up to power of 2
115          * This is granted by the dma_alloc_coherent
116          */
117         vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL);
118         if (!vring->va) {
119                 kfree(vring->ctx);
120                 vring->ctx = NULL;
121                 return -ENOMEM;
122         }
123         /* initially, all descriptors are SW owned
124          * For Tx and Rx, ownership bit is at the same location, thus
125          * we can use any
126          */
127         for (i = 0; i < vring->size; i++) {
128                 volatile struct vring_tx_desc *_d = &vring->va[i].tx;
129
130                 _d->dma.status = TX_DMA_STATUS_DU;
131         }
132
133         wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size,
134                      vring->va, &vring->pa, vring->ctx);
135
136         return 0;
137 }
138
139 static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d,
140                              struct wil_ctx *ctx)
141 {
142         dma_addr_t pa = wil_desc_addr(&d->dma.addr);
143         u16 dmalen = le16_to_cpu(d->dma.length);
144
145         switch (ctx->mapped_as) {
146         case wil_mapped_as_single:
147                 dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
148                 break;
149         case wil_mapped_as_page:
150                 dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
151                 break;
152         default:
153                 break;
154         }
155 }
156
157 static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring,
158                            int tx)
159 {
160         struct device *dev = wil_to_dev(wil);
161         size_t sz = vring->size * sizeof(vring->va[0]);
162
163         if (tx) {
164                 int vring_index = vring - wil->vring_tx;
165
166                 wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n",
167                              vring_index, vring->size, vring->va,
168                              &vring->pa, vring->ctx);
169         } else {
170                 wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n",
171                              vring->size, vring->va,
172                              &vring->pa, vring->ctx);
173         }
174
175         while (!wil_vring_is_empty(vring)) {
176                 dma_addr_t pa;
177                 u16 dmalen;
178                 struct wil_ctx *ctx;
179
180                 if (tx) {
181                         struct vring_tx_desc dd, *d = &dd;
182                         volatile struct vring_tx_desc *_d =
183                                         &vring->va[vring->swtail].tx;
184
185                         ctx = &vring->ctx[vring->swtail];
186                         *d = *_d;
187                         wil_txdesc_unmap(dev, d, ctx);
188                         if (ctx->skb)
189                                 dev_kfree_skb_any(ctx->skb);
190                         vring->swtail = wil_vring_next_tail(vring);
191                 } else { /* rx */
192                         struct vring_rx_desc dd, *d = &dd;
193                         volatile struct vring_rx_desc *_d =
194                                         &vring->va[vring->swhead].rx;
195
196                         ctx = &vring->ctx[vring->swhead];
197                         *d = *_d;
198                         pa = wil_desc_addr(&d->dma.addr);
199                         dmalen = le16_to_cpu(d->dma.length);
200                         dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE);
201                         kfree_skb(ctx->skb);
202                         wil_vring_advance_head(vring, 1);
203                 }
204         }
205         dma_free_coherent(dev, sz, (void *)vring->va, vring->pa);
206         kfree(vring->ctx);
207         vring->pa = 0;
208         vring->va = NULL;
209         vring->ctx = NULL;
210 }
211
212 /**
213  * Allocate one skb for Rx VRING
214  *
215  * Safe to call from IRQ
216  */
217 static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring,
218                                u32 i, int headroom)
219 {
220         struct device *dev = wil_to_dev(wil);
221         unsigned int sz = mtu_max + ETH_HLEN + wil_rx_snaplen();
222         struct vring_rx_desc dd, *d = &dd;
223         volatile struct vring_rx_desc *_d = &vring->va[i].rx;
224         dma_addr_t pa;
225         struct sk_buff *skb = dev_alloc_skb(sz + headroom);
226
227         if (unlikely(!skb))
228                 return -ENOMEM;
229
230         skb_reserve(skb, headroom);
231         skb_put(skb, sz);
232
233         pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE);
234         if (unlikely(dma_mapping_error(dev, pa))) {
235                 kfree_skb(skb);
236                 return -ENOMEM;
237         }
238
239         d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT;
240         wil_desc_addr_set(&d->dma.addr, pa);
241         /* ip_length don't care */
242         /* b11 don't care */
243         /* error don't care */
244         d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
245         d->dma.length = cpu_to_le16(sz);
246         *_d = *d;
247         vring->ctx[i].skb = skb;
248
249         return 0;
250 }
251
252 /**
253  * Adds radiotap header
254  *
255  * Any error indicated as "Bad FCS"
256  *
257  * Vendor data for 04:ce:14-1 (Wilocity-1) consists of:
258  *  - Rx descriptor: 32 bytes
259  *  - Phy info
260  */
261 static void wil_rx_add_radiotap_header(struct wil6210_priv *wil,
262                                        struct sk_buff *skb)
263 {
264         struct wireless_dev *wdev = wil->wdev;
265         struct wil6210_rtap {
266                 struct ieee80211_radiotap_header rthdr;
267                 /* fields should be in the order of bits in rthdr.it_present */
268                 /* flags */
269                 u8 flags;
270                 /* channel */
271                 __le16 chnl_freq __aligned(2);
272                 __le16 chnl_flags;
273                 /* MCS */
274                 u8 mcs_present;
275                 u8 mcs_flags;
276                 u8 mcs_index;
277         } __packed;
278         struct wil6210_rtap_vendor {
279                 struct wil6210_rtap rtap;
280                 /* vendor */
281                 u8 vendor_oui[3] __aligned(2);
282                 u8 vendor_ns;
283                 __le16 vendor_skip;
284                 u8 vendor_data[0];
285         } __packed;
286         struct vring_rx_desc *d = wil_skb_rxdesc(skb);
287         struct wil6210_rtap_vendor *rtap_vendor;
288         int rtap_len = sizeof(struct wil6210_rtap);
289         int phy_length = 0; /* phy info header size, bytes */
290         static char phy_data[128];
291         struct ieee80211_channel *ch = wdev->preset_chandef.chan;
292
293         if (rtap_include_phy_info) {
294                 rtap_len = sizeof(*rtap_vendor) + sizeof(*d);
295                 /* calculate additional length */
296                 if (d->dma.status & RX_DMA_STATUS_PHY_INFO) {
297                         /**
298                          * PHY info starts from 8-byte boundary
299                          * there are 8-byte lines, last line may be partially
300                          * written (HW bug), thus FW configures for last line
301                          * to be excessive. Driver skips this last line.
302                          */
303                         int len = min_t(int, 8 + sizeof(phy_data),
304                                         wil_rxdesc_phy_length(d));
305
306                         if (len > 8) {
307                                 void *p = skb_tail_pointer(skb);
308                                 void *pa = PTR_ALIGN(p, 8);
309
310                                 if (skb_tailroom(skb) >= len + (pa - p)) {
311                                         phy_length = len - 8;
312                                         memcpy(phy_data, pa, phy_length);
313                                 }
314                         }
315                 }
316                 rtap_len += phy_length;
317         }
318
319         if (skb_headroom(skb) < rtap_len &&
320             pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) {
321                 wil_err(wil, "Unable to expand headrom to %d\n", rtap_len);
322                 return;
323         }
324
325         rtap_vendor = (void *)skb_push(skb, rtap_len);
326         memset(rtap_vendor, 0, rtap_len);
327
328         rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION;
329         rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len);
330         rtap_vendor->rtap.rthdr.it_present = cpu_to_le32(
331                         (1 << IEEE80211_RADIOTAP_FLAGS) |
332                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
333                         (1 << IEEE80211_RADIOTAP_MCS));
334         if (d->dma.status & RX_DMA_STATUS_ERROR)
335                 rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS;
336
337         rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320);
338         rtap_vendor->rtap.chnl_flags = cpu_to_le16(0);
339
340         rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS;
341         rtap_vendor->rtap.mcs_flags = 0;
342         rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d);
343
344         if (rtap_include_phy_info) {
345                 rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 <<
346                                 IEEE80211_RADIOTAP_VENDOR_NAMESPACE);
347                 /* OUI for Wilocity 04:ce:14 */
348                 rtap_vendor->vendor_oui[0] = 0x04;
349                 rtap_vendor->vendor_oui[1] = 0xce;
350                 rtap_vendor->vendor_oui[2] = 0x14;
351                 rtap_vendor->vendor_ns = 1;
352                 /* Rx descriptor + PHY data  */
353                 rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) +
354                                                        phy_length);
355                 memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d));
356                 memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data,
357                        phy_length);
358         }
359 }
360
361 /**
362  * reap 1 frame from @swhead
363  *
364  * Rx descriptor copied to skb->cb
365  *
366  * Safe to call from IRQ
367  */
368 static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
369                                          struct vring *vring)
370 {
371         struct device *dev = wil_to_dev(wil);
372         struct net_device *ndev = wil_to_ndev(wil);
373         volatile struct vring_rx_desc *_d;
374         struct vring_rx_desc *d;
375         struct sk_buff *skb;
376         dma_addr_t pa;
377         unsigned int snaplen = wil_rx_snaplen();
378         unsigned int sz = mtu_max + ETH_HLEN + snaplen;
379         u16 dmalen;
380         u8 ftype;
381         int cid;
382         int i = (int)vring->swhead;
383         struct wil_net_stats *stats;
384
385         BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb));
386
387         if (unlikely(wil_vring_is_empty(vring)))
388                 return NULL;
389
390         _d = &vring->va[i].rx;
391         if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) {
392                 /* it is not error, we just reached end of Rx done area */
393                 return NULL;
394         }
395
396         skb = vring->ctx[i].skb;
397         vring->ctx[i].skb = NULL;
398         wil_vring_advance_head(vring, 1);
399         if (!skb) {
400                 wil_err(wil, "No Rx skb at [%d]\n", i);
401                 return NULL;
402         }
403         d = wil_skb_rxdesc(skb);
404         *d = *_d;
405         pa = wil_desc_addr(&d->dma.addr);
406
407         dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE);
408         dmalen = le16_to_cpu(d->dma.length);
409
410         trace_wil6210_rx(i, d);
411         wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen);
412         wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4,
413                           (const void *)d, sizeof(*d), false);
414
415         if (unlikely(dmalen > sz)) {
416                 wil_err(wil, "Rx size too large: %d bytes!\n", dmalen);
417                 kfree_skb(skb);
418                 return NULL;
419         }
420         skb_trim(skb, dmalen);
421
422         prefetch(skb->data);
423
424         wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
425                           skb->data, skb_headlen(skb), false);
426
427         cid = wil_rxdesc_cid(d);
428         stats = &wil->sta[cid].stats;
429         stats->last_mcs_rx = wil_rxdesc_mcs(d);
430         if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs))
431                 stats->rx_per_mcs[stats->last_mcs_rx]++;
432
433         /* use radiotap header only if required */
434         if (ndev->type == ARPHRD_IEEE80211_RADIOTAP)
435                 wil_rx_add_radiotap_header(wil, skb);
436
437         /* no extra checks if in sniffer mode */
438         if (ndev->type != ARPHRD_ETHER)
439                 return skb;
440         /*
441          * Non-data frames may be delivered through Rx DMA channel (ex: BAR)
442          * Driver should recognize it by frame type, that is found
443          * in Rx descriptor. If type is not data, it is 802.11 frame as is
444          */
445         ftype = wil_rxdesc_ftype(d) << 2;
446         if (unlikely(ftype != IEEE80211_FTYPE_DATA)) {
447                 wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype);
448                 /* TODO: process it */
449                 kfree_skb(skb);
450                 return NULL;
451         }
452
453         if (unlikely(skb->len < ETH_HLEN + snaplen)) {
454                 wil_err(wil, "Short frame, len = %d\n", skb->len);
455                 /* TODO: process it (i.e. BAR) */
456                 kfree_skb(skb);
457                 return NULL;
458         }
459
460         /* L4 IDENT is on when HW calculated checksum, check status
461          * and in case of error drop the packet
462          * higher stack layers will handle retransmission (if required)
463          */
464         if (likely(d->dma.status & RX_DMA_STATUS_L4I)) {
465                 /* L4 protocol identified, csum calculated */
466                 if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0))
467                         skb->ip_summed = CHECKSUM_UNNECESSARY;
468                 /* If HW reports bad checksum, let IP stack re-check it
469                  * For example, HW don't understand Microsoft IP stack that
470                  * mis-calculates TCP checksum - if it should be 0x0,
471                  * it writes 0xffff in violation of RFC 1624
472                  */
473         }
474
475         if (snaplen) {
476                 /* Packet layout
477                  * +-------+-------+---------+------------+------+
478                  * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA |
479                  * +-------+-------+---------+------------+------+
480                  * Need to remove SNAP, shifting SA and DA forward
481                  */
482                 memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN);
483                 skb_pull(skb, snaplen);
484         }
485
486         return skb;
487 }
488
489 /**
490  * allocate and fill up to @count buffers in rx ring
491  * buffers posted at @swtail
492  */
493 static int wil_rx_refill(struct wil6210_priv *wil, int count)
494 {
495         struct net_device *ndev = wil_to_ndev(wil);
496         struct vring *v = &wil->vring_rx;
497         u32 next_tail;
498         int rc = 0;
499         int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ?
500                         WIL6210_RTAP_SIZE : 0;
501
502         for (; next_tail = wil_vring_next_tail(v),
503                         (next_tail != v->swhead) && (count-- > 0);
504                         v->swtail = next_tail) {
505                 rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom);
506                 if (unlikely(rc)) {
507                         wil_err(wil, "Error %d in wil_rx_refill[%d]\n",
508                                 rc, v->swtail);
509                         break;
510                 }
511         }
512         wil_w(wil, v->hwtail, v->swtail);
513
514         return rc;
515 }
516
517 /*
518  * Pass Rx packet to the netif. Update statistics.
519  * Called in softirq context (NAPI poll).
520  */
521 void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev)
522 {
523         gro_result_t rc = GRO_NORMAL;
524         struct wil6210_priv *wil = ndev_to_wil(ndev);
525         struct wireless_dev *wdev = wil_to_wdev(wil);
526         unsigned int len = skb->len;
527         struct vring_rx_desc *d = wil_skb_rxdesc(skb);
528         int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */
529         struct ethhdr *eth = (void *)skb->data;
530         /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication
531          * is not suitable, need to look at data
532          */
533         int mcast = is_multicast_ether_addr(eth->h_dest);
534         struct wil_net_stats *stats = &wil->sta[cid].stats;
535         struct sk_buff *xmit_skb = NULL;
536         static const char * const gro_res_str[] = {
537                 [GRO_MERGED]            = "GRO_MERGED",
538                 [GRO_MERGED_FREE]       = "GRO_MERGED_FREE",
539                 [GRO_HELD]              = "GRO_HELD",
540                 [GRO_NORMAL]            = "GRO_NORMAL",
541                 [GRO_DROP]              = "GRO_DROP",
542         };
543
544         if (ndev->features & NETIF_F_RXHASH)
545                 /* fake L4 to ensure it won't be re-calculated later
546                  * set hash to any non-zero value to activate rps
547                  * mechanism, core will be chosen according
548                  * to user-level rps configuration.
549                  */
550                 skb_set_hash(skb, 1, PKT_HASH_TYPE_L4);
551
552         skb_orphan(skb);
553
554         if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) {
555                 if (mcast) {
556                         /* send multicast frames both to higher layers in
557                          * local net stack and back to the wireless medium
558                          */
559                         xmit_skb = skb_copy(skb, GFP_ATOMIC);
560                 } else {
561                         int xmit_cid = wil_find_cid(wil, eth->h_dest);
562
563                         if (xmit_cid >= 0) {
564                                 /* The destination station is associated to
565                                  * this AP (in this VLAN), so send the frame
566                                  * directly to it and do not pass it to local
567                                  * net stack.
568                                  */
569                                 xmit_skb = skb;
570                                 skb = NULL;
571                         }
572                 }
573         }
574         if (xmit_skb) {
575                 /* Send to wireless media and increase priority by 256 to
576                  * keep the received priority instead of reclassifying
577                  * the frame (see cfg80211_classify8021d).
578                  */
579                 xmit_skb->dev = ndev;
580                 xmit_skb->priority += 256;
581                 xmit_skb->protocol = htons(ETH_P_802_3);
582                 skb_reset_network_header(xmit_skb);
583                 skb_reset_mac_header(xmit_skb);
584                 wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len);
585                 dev_queue_xmit(xmit_skb);
586         }
587
588         if (skb) { /* deliver to local stack */
589
590                 skb->protocol = eth_type_trans(skb, ndev);
591                 rc = napi_gro_receive(&wil->napi_rx, skb);
592                 wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n",
593                              len, gro_res_str[rc]);
594         }
595         /* statistics. rc set to GRO_NORMAL for AP bridging */
596         if (unlikely(rc == GRO_DROP)) {
597                 ndev->stats.rx_dropped++;
598                 stats->rx_dropped++;
599                 wil_dbg_txrx(wil, "Rx drop %d bytes\n", len);
600         } else {
601                 ndev->stats.rx_packets++;
602                 stats->rx_packets++;
603                 ndev->stats.rx_bytes += len;
604                 stats->rx_bytes += len;
605                 if (mcast)
606                         ndev->stats.multicast++;
607         }
608 }
609
610 /**
611  * Proceed all completed skb's from Rx VRING
612  *
613  * Safe to call from NAPI poll, i.e. softirq with interrupts enabled
614  */
615 void wil_rx_handle(struct wil6210_priv *wil, int *quota)
616 {
617         struct net_device *ndev = wil_to_ndev(wil);
618         struct vring *v = &wil->vring_rx;
619         struct sk_buff *skb;
620
621         if (unlikely(!v->va)) {
622                 wil_err(wil, "Rx IRQ while Rx not yet initialized\n");
623                 return;
624         }
625         wil_dbg_txrx(wil, "%s()\n", __func__);
626         while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) {
627                 (*quota)--;
628
629                 if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) {
630                         skb->dev = ndev;
631                         skb_reset_mac_header(skb);
632                         skb->ip_summed = CHECKSUM_UNNECESSARY;
633                         skb->pkt_type = PACKET_OTHERHOST;
634                         skb->protocol = htons(ETH_P_802_2);
635                         wil_netif_rx_any(skb, ndev);
636                 } else {
637                         wil_rx_reorder(wil, skb);
638                 }
639         }
640         wil_rx_refill(wil, v->size);
641 }
642
643 int wil_rx_init(struct wil6210_priv *wil, u16 size)
644 {
645         struct vring *vring = &wil->vring_rx;
646         int rc;
647
648         wil_dbg_misc(wil, "%s()\n", __func__);
649
650         if (vring->va) {
651                 wil_err(wil, "Rx ring already allocated\n");
652                 return -EINVAL;
653         }
654
655         vring->size = size;
656         rc = wil_vring_alloc(wil, vring);
657         if (rc)
658                 return rc;
659
660         rc = wmi_rx_chain_add(wil, vring);
661         if (rc)
662                 goto err_free;
663
664         rc = wil_rx_refill(wil, vring->size);
665         if (rc)
666                 goto err_free;
667
668         return 0;
669  err_free:
670         wil_vring_free(wil, vring, 0);
671
672         return rc;
673 }
674
675 void wil_rx_fini(struct wil6210_priv *wil)
676 {
677         struct vring *vring = &wil->vring_rx;
678
679         wil_dbg_misc(wil, "%s()\n", __func__);
680
681         if (vring->va)
682                 wil_vring_free(wil, vring, 0);
683 }
684
685 int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size,
686                       int cid, int tid)
687 {
688         int rc;
689         struct wmi_vring_cfg_cmd cmd = {
690                 .action = cpu_to_le32(WMI_VRING_CMD_ADD),
691                 .vring_cfg = {
692                         .tx_sw_ring = {
693                                 .max_mpdu_size =
694                                         cpu_to_le16(wil_mtu2macbuf(mtu_max)),
695                                 .ring_size = cpu_to_le16(size),
696                         },
697                         .ringid = id,
698                         .cidxtid = mk_cidxtid(cid, tid),
699                         .encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
700                         .mac_ctrl = 0,
701                         .to_resolution = 0,
702                         .agg_max_wsize = 0,
703                         .schd_params = {
704                                 .priority = cpu_to_le16(0),
705                                 .timeslot_us = cpu_to_le16(0xfff),
706                         },
707                 },
708         };
709         struct {
710                 struct wil6210_mbox_hdr_wmi wmi;
711                 struct wmi_vring_cfg_done_event cmd;
712         } __packed reply;
713         struct vring *vring = &wil->vring_tx[id];
714         struct vring_tx_data *txdata = &wil->vring_tx_data[id];
715
716         wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__,
717                      cmd.vring_cfg.tx_sw_ring.max_mpdu_size);
718
719         if (vring->va) {
720                 wil_err(wil, "Tx ring [%d] already allocated\n", id);
721                 rc = -EINVAL;
722                 goto out;
723         }
724
725         memset(txdata, 0, sizeof(*txdata));
726         spin_lock_init(&txdata->lock);
727         vring->size = size;
728         rc = wil_vring_alloc(wil, vring);
729         if (rc)
730                 goto out;
731
732         wil->vring2cid_tid[id][0] = cid;
733         wil->vring2cid_tid[id][1] = tid;
734
735         cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa);
736
737         if (!wil->privacy)
738                 txdata->dot1x_open = true;
739         rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd),
740                       WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100);
741         if (rc)
742                 goto out_free;
743
744         if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) {
745                 wil_err(wil, "Tx config failed, status 0x%02x\n",
746                         reply.cmd.status);
747                 rc = -EINVAL;
748                 goto out_free;
749         }
750         vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr);
751
752         txdata->enabled = 1;
753         if (txdata->dot1x_open && (agg_wsize >= 0))
754                 wil_addba_tx_request(wil, id, agg_wsize);
755
756         return 0;
757  out_free:
758         txdata->dot1x_open = false;
759         txdata->enabled = 0;
760         wil_vring_free(wil, vring, 1);
761  out:
762
763         return rc;
764 }
765
766 int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size)
767 {
768         int rc;
769         struct wmi_bcast_vring_cfg_cmd cmd = {
770                 .action = cpu_to_le32(WMI_VRING_CMD_ADD),
771                 .vring_cfg = {
772                         .tx_sw_ring = {
773                                 .max_mpdu_size =
774                                         cpu_to_le16(wil_mtu2macbuf(mtu_max)),
775                                 .ring_size = cpu_to_le16(size),
776                         },
777                         .ringid = id,
778                         .encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
779                 },
780         };
781         struct {
782                 struct wil6210_mbox_hdr_wmi wmi;
783                 struct wmi_vring_cfg_done_event cmd;
784         } __packed reply;
785         struct vring *vring = &wil->vring_tx[id];
786         struct vring_tx_data *txdata = &wil->vring_tx_data[id];
787
788         wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__,
789                      cmd.vring_cfg.tx_sw_ring.max_mpdu_size);
790
791         if (vring->va) {
792                 wil_err(wil, "Tx ring [%d] already allocated\n", id);
793                 rc = -EINVAL;
794                 goto out;
795         }
796
797         memset(txdata, 0, sizeof(*txdata));
798         spin_lock_init(&txdata->lock);
799         vring->size = size;
800         rc = wil_vring_alloc(wil, vring);
801         if (rc)
802                 goto out;
803
804         wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */
805         wil->vring2cid_tid[id][1] = 0; /* TID */
806
807         cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa);
808
809         if (!wil->privacy)
810                 txdata->dot1x_open = true;
811         rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd),
812                       WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100);
813         if (rc)
814                 goto out_free;
815
816         if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) {
817                 wil_err(wil, "Tx config failed, status 0x%02x\n",
818                         reply.cmd.status);
819                 rc = -EINVAL;
820                 goto out_free;
821         }
822         vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr);
823
824         txdata->enabled = 1;
825
826         return 0;
827  out_free:
828         txdata->enabled = 0;
829         txdata->dot1x_open = false;
830         wil_vring_free(wil, vring, 1);
831  out:
832
833         return rc;
834 }
835
836 void wil_vring_fini_tx(struct wil6210_priv *wil, int id)
837 {
838         struct vring *vring = &wil->vring_tx[id];
839         struct vring_tx_data *txdata = &wil->vring_tx_data[id];
840
841         WARN_ON(!mutex_is_locked(&wil->mutex));
842
843         if (!vring->va)
844                 return;
845
846         wil_dbg_misc(wil, "%s() id=%d\n", __func__, id);
847
848         spin_lock_bh(&txdata->lock);
849         txdata->dot1x_open = false;
850         txdata->enabled = 0; /* no Tx can be in progress or start anew */
851         spin_unlock_bh(&txdata->lock);
852         /* make sure NAPI won't touch this vring */
853         if (test_bit(wil_status_napi_en, wil->status))
854                 napi_synchronize(&wil->napi_tx);
855
856         wil_vring_free(wil, vring, 1);
857         memset(txdata, 0, sizeof(*txdata));
858 }
859
860 static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil,
861                                        struct sk_buff *skb)
862 {
863         int i;
864         struct ethhdr *eth = (void *)skb->data;
865         int cid = wil_find_cid(wil, eth->h_dest);
866
867         if (cid < 0)
868                 return NULL;
869
870         /* TODO: fix for multiple TID */
871         for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) {
872                 if (!wil->vring_tx_data[i].dot1x_open &&
873                     (skb->protocol != cpu_to_be16(ETH_P_PAE)))
874                         continue;
875                 if (wil->vring2cid_tid[i][0] == cid) {
876                         struct vring *v = &wil->vring_tx[i];
877
878                         wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n",
879                                      __func__, eth->h_dest, i);
880                         if (v->va) {
881                                 return v;
882                         } else {
883                                 wil_dbg_txrx(wil, "vring[%d] not valid\n", i);
884                                 return NULL;
885                         }
886                 }
887         }
888
889         return NULL;
890 }
891
892 static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
893                         struct sk_buff *skb);
894
895 static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil,
896                                            struct sk_buff *skb)
897 {
898         struct vring *v;
899         int i;
900         u8 cid;
901
902         /* In the STA mode, it is expected to have only 1 VRING
903          * for the AP we connected to.
904          * find 1-st vring eligible for this skb and use it.
905          */
906         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
907                 v = &wil->vring_tx[i];
908                 if (!v->va)
909                         continue;
910
911                 cid = wil->vring2cid_tid[i][0];
912                 if (cid >= WIL6210_MAX_CID) /* skip BCAST */
913                         continue;
914
915                 if (!wil->vring_tx_data[i].dot1x_open &&
916                     (skb->protocol != cpu_to_be16(ETH_P_PAE)))
917                         continue;
918
919                 wil_dbg_txrx(wil, "Tx -> ring %d\n", i);
920
921                 return v;
922         }
923
924         wil_dbg_txrx(wil, "Tx while no vrings active?\n");
925
926         return NULL;
927 }
928
929 /* Use one of 2 strategies:
930  *
931  * 1. New (real broadcast):
932  *    use dedicated broadcast vring
933  * 2. Old (pseudo-DMS):
934  *    Find 1-st vring and return it;
935  *    duplicate skb and send it to other active vrings;
936  *    in all cases override dest address to unicast peer's address
937  * Use old strategy when new is not supported yet:
938  *  - for PBSS
939  */
940 static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil,
941                                          struct sk_buff *skb)
942 {
943         struct vring *v;
944         int i = wil->bcast_vring;
945
946         if (i < 0)
947                 return NULL;
948         v = &wil->vring_tx[i];
949         if (!v->va)
950                 return NULL;
951         if (!wil->vring_tx_data[i].dot1x_open &&
952             (skb->protocol != cpu_to_be16(ETH_P_PAE)))
953                 return NULL;
954
955         return v;
956 }
957
958 static void wil_set_da_for_vring(struct wil6210_priv *wil,
959                                  struct sk_buff *skb, int vring_index)
960 {
961         struct ethhdr *eth = (void *)skb->data;
962         int cid = wil->vring2cid_tid[vring_index][0];
963
964         ether_addr_copy(eth->h_dest, wil->sta[cid].addr);
965 }
966
967 static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil,
968                                          struct sk_buff *skb)
969 {
970         struct vring *v, *v2;
971         struct sk_buff *skb2;
972         int i;
973         u8 cid;
974         struct ethhdr *eth = (void *)skb->data;
975         char *src = eth->h_source;
976
977         /* find 1-st vring eligible for data */
978         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
979                 v = &wil->vring_tx[i];
980                 if (!v->va)
981                         continue;
982
983                 cid = wil->vring2cid_tid[i][0];
984                 if (cid >= WIL6210_MAX_CID) /* skip BCAST */
985                         continue;
986                 if (!wil->vring_tx_data[i].dot1x_open &&
987                     (skb->protocol != cpu_to_be16(ETH_P_PAE)))
988                         continue;
989
990                 /* don't Tx back to source when re-routing Rx->Tx at the AP */
991                 if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN))
992                         continue;
993
994                 goto found;
995         }
996
997         wil_dbg_txrx(wil, "Tx while no vrings active?\n");
998
999         return NULL;
1000
1001 found:
1002         wil_dbg_txrx(wil, "BCAST -> ring %d\n", i);
1003         wil_set_da_for_vring(wil, skb, i);
1004
1005         /* find other active vrings and duplicate skb for each */
1006         for (i++; i < WIL6210_MAX_TX_RINGS; i++) {
1007                 v2 = &wil->vring_tx[i];
1008                 if (!v2->va)
1009                         continue;
1010                 cid = wil->vring2cid_tid[i][0];
1011                 if (cid >= WIL6210_MAX_CID) /* skip BCAST */
1012                         continue;
1013                 if (!wil->vring_tx_data[i].dot1x_open &&
1014                     (skb->protocol != cpu_to_be16(ETH_P_PAE)))
1015                         continue;
1016
1017                 if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN))
1018                         continue;
1019
1020                 skb2 = skb_copy(skb, GFP_ATOMIC);
1021                 if (skb2) {
1022                         wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i);
1023                         wil_set_da_for_vring(wil, skb2, i);
1024                         wil_tx_vring(wil, v2, skb2);
1025                 } else {
1026                         wil_err(wil, "skb_copy failed\n");
1027                 }
1028         }
1029
1030         return v;
1031 }
1032
1033 static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil,
1034                                        struct sk_buff *skb)
1035 {
1036         struct wireless_dev *wdev = wil->wdev;
1037
1038         if (wdev->iftype != NL80211_IFTYPE_AP)
1039                 return wil_find_tx_bcast_2(wil, skb);
1040
1041         return wil_find_tx_bcast_1(wil, skb);
1042 }
1043
1044 static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len,
1045                            int vring_index)
1046 {
1047         wil_desc_addr_set(&d->dma.addr, pa);
1048         d->dma.ip_length = 0;
1049         /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/
1050         d->dma.b11 = 0/*14 | BIT(7)*/;
1051         d->dma.error = 0;
1052         d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */
1053         d->dma.length = cpu_to_le16((u16)len);
1054         d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS);
1055         d->mac.d[0] = 0;
1056         d->mac.d[1] = 0;
1057         d->mac.d[2] = 0;
1058         d->mac.ucode_cmd = 0;
1059         /* translation type:  0 - bypass; 1 - 802.3; 2 - native wifi */
1060         d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) |
1061                       (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS);
1062
1063         return 0;
1064 }
1065
1066 static inline
1067 void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags)
1068 {
1069         d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS);
1070 }
1071
1072 /**
1073  * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding
1074  * @skb is used to obtain the protocol and headers length.
1075  * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data,
1076  * 2 - middle, 3 - last descriptor.
1077  */
1078
1079 static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d,
1080                                           struct sk_buff *skb,
1081                                           int tso_desc_type, bool is_ipv4,
1082                                           int tcp_hdr_len, int skb_net_hdr_len)
1083 {
1084         d->dma.b11 = ETH_HLEN; /* MAC header length */
1085         d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS;
1086
1087         d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS);
1088         /* L4 header len: TCP header length */
1089         d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK);
1090
1091         /* Setup TSO: bit and desc type */
1092         d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) |
1093                 (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS);
1094         d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS);
1095
1096         d->dma.ip_length = skb_net_hdr_len;
1097         /* Enable TCP/UDP checksum */
1098         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS);
1099         /* Calculate pseudo-header */
1100         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS);
1101 }
1102
1103 /**
1104  * Sets the descriptor @d up for csum. The corresponding
1105  * @skb is used to obtain the protocol and headers length.
1106  * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6.
1107  * Note, if d==NULL, the function only returns the protocol result.
1108  *
1109  * It is very similar to previous wil_tx_desc_offload_setup_tso. This
1110  * is "if unrolling" to optimize the critical path.
1111  */
1112
1113 static int wil_tx_desc_offload_setup(struct vring_tx_desc *d,
1114                                      struct sk_buff *skb){
1115         int protocol;
1116
1117         if (skb->ip_summed != CHECKSUM_PARTIAL)
1118                 return 0;
1119
1120         d->dma.b11 = ETH_HLEN; /* MAC header length */
1121
1122         switch (skb->protocol) {
1123         case cpu_to_be16(ETH_P_IP):
1124                 protocol = ip_hdr(skb)->protocol;
1125                 d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS);
1126                 break;
1127         case cpu_to_be16(ETH_P_IPV6):
1128                 protocol = ipv6_hdr(skb)->nexthdr;
1129                 break;
1130         default:
1131                 return -EINVAL;
1132         }
1133
1134         switch (protocol) {
1135         case IPPROTO_TCP:
1136                 d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS);
1137                 /* L4 header len: TCP header length */
1138                 d->dma.d0 |=
1139                 (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK);
1140                 break;
1141         case IPPROTO_UDP:
1142                 /* L4 header len: UDP header length */
1143                 d->dma.d0 |=
1144                 (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK);
1145                 break;
1146         default:
1147                 return -EINVAL;
1148         }
1149
1150         d->dma.ip_length = skb_network_header_len(skb);
1151         /* Enable TCP/UDP checksum */
1152         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS);
1153         /* Calculate pseudo-header */
1154         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS);
1155
1156         return 0;
1157 }
1158
1159 static inline void wil_tx_last_desc(struct vring_tx_desc *d)
1160 {
1161         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) |
1162               BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) |
1163               BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS);
1164 }
1165
1166 static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d)
1167 {
1168         d->dma.d0 |= wil_tso_type_lst <<
1169                   DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS;
1170 }
1171
1172 static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring,
1173                               struct sk_buff *skb)
1174 {
1175         struct device *dev = wil_to_dev(wil);
1176
1177         /* point to descriptors in shared memory */
1178         volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc,
1179                                       *_first_desc = NULL;
1180
1181         /* pointers to shadow descriptors */
1182         struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem,
1183                              *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem,
1184                              *first_desc = &first_desc_mem;
1185
1186         /* pointer to shadow descriptors' context */
1187         struct wil_ctx *hdr_ctx, *first_ctx = NULL;
1188
1189         int descs_used = 0; /* total number of used descriptors */
1190         int sg_desc_cnt = 0; /* number of descriptors for current mss*/
1191
1192         u32 swhead = vring->swhead;
1193         int used, avail = wil_vring_avail_tx(vring);
1194         int nr_frags = skb_shinfo(skb)->nr_frags;
1195         int min_desc_required = nr_frags + 1;
1196         int mss = skb_shinfo(skb)->gso_size;    /* payload size w/o headers */
1197         int f, len, hdrlen, headlen;
1198         int vring_index = vring - wil->vring_tx;
1199         struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index];
1200         uint i = swhead;
1201         dma_addr_t pa;
1202         const skb_frag_t *frag = NULL;
1203         int rem_data = mss;
1204         int lenmss;
1205         int hdr_compensation_need = true;
1206         int desc_tso_type = wil_tso_type_first;
1207         bool is_ipv4;
1208         int tcp_hdr_len;
1209         int skb_net_hdr_len;
1210         int gso_type;
1211
1212         wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n",
1213                      __func__, skb->len, vring_index);
1214
1215         if (unlikely(!txdata->enabled))
1216                 return -EINVAL;
1217
1218         /* A typical page 4K is 3-4 payloads, we assume each fragment
1219          * is a full payload, that's how min_desc_required has been
1220          * calculated. In real we might need more or less descriptors,
1221          * this is the initial check only.
1222          */
1223         if (unlikely(avail < min_desc_required)) {
1224                 wil_err_ratelimited(wil,
1225                                     "TSO: Tx ring[%2d] full. No space for %d fragments\n",
1226                                     vring_index, min_desc_required);
1227                 return -ENOMEM;
1228         }
1229
1230         /* Header Length = MAC header len + IP header len + TCP header len*/
1231         hdrlen = ETH_HLEN +
1232                 (int)skb_network_header_len(skb) +
1233                 tcp_hdrlen(skb);
1234
1235         gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4);
1236         switch (gso_type) {
1237         case SKB_GSO_TCPV4:
1238                 /* TCP v4, zero out the IP length and IPv4 checksum fields
1239                  * as required by the offloading doc
1240                  */
1241                 ip_hdr(skb)->tot_len = 0;
1242                 ip_hdr(skb)->check = 0;
1243                 is_ipv4 = true;
1244                 break;
1245         case SKB_GSO_TCPV6:
1246                 /* TCP v6, zero out the payload length */
1247                 ipv6_hdr(skb)->payload_len = 0;
1248                 is_ipv4 = false;
1249                 break;
1250         default:
1251                 /* other than TCPv4 or TCPv6 types are not supported for TSO.
1252                  * It is also illegal for both to be set simultaneously
1253                  */
1254                 return -EINVAL;
1255         }
1256
1257         if (skb->ip_summed != CHECKSUM_PARTIAL)
1258                 return -EINVAL;
1259
1260         /* tcp header length and skb network header length are fixed for all
1261          * packet's descriptors - read then once here
1262          */
1263         tcp_hdr_len = tcp_hdrlen(skb);
1264         skb_net_hdr_len = skb_network_header_len(skb);
1265
1266         _hdr_desc = &vring->va[i].tx;
1267
1268         pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE);
1269         if (unlikely(dma_mapping_error(dev, pa))) {
1270                 wil_err(wil, "TSO: Skb head DMA map error\n");
1271                 goto err_exit;
1272         }
1273
1274         wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index);
1275         wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4,
1276                                       tcp_hdr_len, skb_net_hdr_len);
1277         wil_tx_last_desc(hdr_desc);
1278
1279         vring->ctx[i].mapped_as = wil_mapped_as_single;
1280         hdr_ctx = &vring->ctx[i];
1281
1282         descs_used++;
1283         headlen = skb_headlen(skb) - hdrlen;
1284
1285         for (f = headlen ? -1 : 0; f < nr_frags; f++)  {
1286                 if (headlen) {
1287                         len = headlen;
1288                         wil_dbg_txrx(wil, "TSO: process skb head, len %u\n",
1289                                      len);
1290                 } else {
1291                         frag = &skb_shinfo(skb)->frags[f];
1292                         len = frag->size;
1293                         wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len);
1294                 }
1295
1296                 while (len) {
1297                         wil_dbg_txrx(wil,
1298                                      "TSO: len %d, rem_data %d, descs_used %d\n",
1299                                      len, rem_data, descs_used);
1300
1301                         if (descs_used == avail)  {
1302                                 wil_err(wil, "TSO: ring overflow\n");
1303                                 goto dma_error;
1304                         }
1305
1306                         lenmss = min_t(int, rem_data, len);
1307                         i = (swhead + descs_used) % vring->size;
1308                         wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i);
1309
1310                         if (!headlen) {
1311                                 pa = skb_frag_dma_map(dev, frag,
1312                                                       frag->size - len, lenmss,
1313                                                       DMA_TO_DEVICE);
1314                                 vring->ctx[i].mapped_as = wil_mapped_as_page;
1315                         } else {
1316                                 pa = dma_map_single(dev,
1317                                                     skb->data +
1318                                                     skb_headlen(skb) - headlen,
1319                                                     lenmss,
1320                                                     DMA_TO_DEVICE);
1321                                 vring->ctx[i].mapped_as = wil_mapped_as_single;
1322                                 headlen -= lenmss;
1323                         }
1324
1325                         if (unlikely(dma_mapping_error(dev, pa)))
1326                                 goto dma_error;
1327
1328                         _desc = &vring->va[i].tx;
1329
1330                         if (!_first_desc) {
1331                                 _first_desc = _desc;
1332                                 first_ctx = &vring->ctx[i];
1333                                 d = first_desc;
1334                         } else {
1335                                 d = &desc_mem;
1336                         }
1337
1338                         wil_tx_desc_map(d, pa, lenmss, vring_index);
1339                         wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type,
1340                                                       is_ipv4, tcp_hdr_len,
1341                                                       skb_net_hdr_len);
1342
1343                         /* use tso_type_first only once */
1344                         desc_tso_type = wil_tso_type_mid;
1345
1346                         descs_used++;  /* desc used so far */
1347                         sg_desc_cnt++; /* desc used for this segment */
1348                         len -= lenmss;
1349                         rem_data -= lenmss;
1350
1351                         wil_dbg_txrx(wil,
1352                                      "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n",
1353                                      len, rem_data, descs_used, sg_desc_cnt);
1354
1355                         /* Close the segment if reached mss size or last frag*/
1356                         if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) {
1357                                 if (hdr_compensation_need) {
1358                                         /* first segment include hdr desc for
1359                                          * release
1360                                          */
1361                                         hdr_ctx->nr_frags = sg_desc_cnt;
1362                                         wil_tx_desc_set_nr_frags(first_desc,
1363                                                                  sg_desc_cnt +
1364                                                                  1);
1365                                         hdr_compensation_need = false;
1366                                 } else {
1367                                         wil_tx_desc_set_nr_frags(first_desc,
1368                                                                  sg_desc_cnt);
1369                                 }
1370                                 first_ctx->nr_frags = sg_desc_cnt - 1;
1371
1372                                 wil_tx_last_desc(d);
1373
1374                                 /* first descriptor may also be the last
1375                                  * for this mss - make sure not to copy
1376                                  * it twice
1377                                  */
1378                                 if (first_desc != d)
1379                                         *_first_desc = *first_desc;
1380
1381                                 /*last descriptor will be copied at the end
1382                                  * of this TS processing
1383                                  */
1384                                 if (f < nr_frags - 1 || len > 0)
1385                                         *_desc = *d;
1386
1387                                 rem_data = mss;
1388                                 _first_desc = NULL;
1389                                 sg_desc_cnt = 0;
1390                         } else if (first_desc != d) /* update mid descriptor */
1391                                         *_desc = *d;
1392                 }
1393         }
1394
1395         /* first descriptor may also be the last.
1396          * in this case d pointer is invalid
1397          */
1398         if (_first_desc == _desc)
1399                 d = first_desc;
1400
1401         /* Last data descriptor */
1402         wil_set_tx_desc_last_tso(d);
1403         *_desc = *d;
1404
1405         /* Fill the total number of descriptors in first desc (hdr)*/
1406         wil_tx_desc_set_nr_frags(hdr_desc, descs_used);
1407         *_hdr_desc = *hdr_desc;
1408
1409         /* hold reference to skb
1410          * to prevent skb release before accounting
1411          * in case of immediate "tx done"
1412          */
1413         vring->ctx[i].skb = skb_get(skb);
1414
1415         /* performance monitoring */
1416         used = wil_vring_used_tx(vring);
1417         if (wil_val_in_range(vring_idle_trsh,
1418                              used, used + descs_used)) {
1419                 txdata->idle += get_cycles() - txdata->last_idle;
1420                 wil_dbg_txrx(wil,  "Ring[%2d] not idle %d -> %d\n",
1421                              vring_index, used, used + descs_used);
1422         }
1423
1424         /* advance swhead */
1425         wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead);
1426         wil_vring_advance_head(vring, descs_used);
1427
1428         /* make sure all writes to descriptors (shared memory) are done before
1429          * committing them to HW
1430          */
1431         wmb();
1432
1433         wil_w(wil, vring->hwtail, vring->swhead);
1434         return 0;
1435
1436 dma_error:
1437         wil_err(wil, "TSO: DMA map page error\n");
1438         while (descs_used > 0) {
1439                 struct wil_ctx *ctx;
1440
1441                 i = (swhead + descs_used) % vring->size;
1442                 d = (struct vring_tx_desc *)&vring->va[i].tx;
1443                 _desc = &vring->va[i].tx;
1444                 *d = *_desc;
1445                 _desc->dma.status = TX_DMA_STATUS_DU;
1446                 ctx = &vring->ctx[i];
1447                 wil_txdesc_unmap(dev, d, ctx);
1448                 if (ctx->skb)
1449                         dev_kfree_skb_any(ctx->skb);
1450                 memset(ctx, 0, sizeof(*ctx));
1451                 descs_used--;
1452         }
1453
1454 err_exit:
1455         return -EINVAL;
1456 }
1457
1458 static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
1459                           struct sk_buff *skb)
1460 {
1461         struct device *dev = wil_to_dev(wil);
1462         struct vring_tx_desc dd, *d = &dd;
1463         volatile struct vring_tx_desc *_d;
1464         u32 swhead = vring->swhead;
1465         int avail = wil_vring_avail_tx(vring);
1466         int nr_frags = skb_shinfo(skb)->nr_frags;
1467         uint f = 0;
1468         int vring_index = vring - wil->vring_tx;
1469         struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index];
1470         uint i = swhead;
1471         dma_addr_t pa;
1472         int used;
1473         bool mcast = (vring_index == wil->bcast_vring);
1474         uint len = skb_headlen(skb);
1475
1476         wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n",
1477                      __func__, skb->len, vring_index);
1478
1479         if (unlikely(!txdata->enabled))
1480                 return -EINVAL;
1481
1482         if (unlikely(avail < 1 + nr_frags)) {
1483                 wil_err_ratelimited(wil,
1484                                     "Tx ring[%2d] full. No space for %d fragments\n",
1485                                     vring_index, 1 + nr_frags);
1486                 return -ENOMEM;
1487         }
1488         _d = &vring->va[i].tx;
1489
1490         pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
1491
1492         wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index,
1493                      skb_headlen(skb), skb->data, &pa);
1494         wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1,
1495                           skb->data, skb_headlen(skb), false);
1496
1497         if (unlikely(dma_mapping_error(dev, pa)))
1498                 return -EINVAL;
1499         vring->ctx[i].mapped_as = wil_mapped_as_single;
1500         /* 1-st segment */
1501         wil_tx_desc_map(d, pa, len, vring_index);
1502         if (unlikely(mcast)) {
1503                 d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */
1504                 if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */
1505                         d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS);
1506         }
1507         /* Process TCP/UDP checksum offloading */
1508         if (unlikely(wil_tx_desc_offload_setup(d, skb))) {
1509                 wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n",
1510                         vring_index);
1511                 goto dma_error;
1512         }
1513
1514         vring->ctx[i].nr_frags = nr_frags;
1515         wil_tx_desc_set_nr_frags(d, nr_frags + 1);
1516
1517         /* middle segments */
1518         for (; f < nr_frags; f++) {
1519                 const struct skb_frag_struct *frag =
1520                                 &skb_shinfo(skb)->frags[f];
1521                 int len = skb_frag_size(frag);
1522
1523                 *_d = *d;
1524                 wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i);
1525                 wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4,
1526                                   (const void *)d, sizeof(*d), false);
1527                 i = (swhead + f + 1) % vring->size;
1528                 _d = &vring->va[i].tx;
1529                 pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
1530                                       DMA_TO_DEVICE);
1531                 if (unlikely(dma_mapping_error(dev, pa)))
1532                         goto dma_error;
1533                 vring->ctx[i].mapped_as = wil_mapped_as_page;
1534                 wil_tx_desc_map(d, pa, len, vring_index);
1535                 /* no need to check return code -
1536                  * if it succeeded for 1-st descriptor,
1537                  * it will succeed here too
1538                  */
1539                 wil_tx_desc_offload_setup(d, skb);
1540         }
1541         /* for the last seg only */
1542         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS);
1543         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS);
1544         d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS);
1545         *_d = *d;
1546         wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i);
1547         wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4,
1548                           (const void *)d, sizeof(*d), false);
1549
1550         /* hold reference to skb
1551          * to prevent skb release before accounting
1552          * in case of immediate "tx done"
1553          */
1554         vring->ctx[i].skb = skb_get(skb);
1555
1556         /* performance monitoring */
1557         used = wil_vring_used_tx(vring);
1558         if (wil_val_in_range(vring_idle_trsh,
1559                              used, used + nr_frags + 1)) {
1560                 txdata->idle += get_cycles() - txdata->last_idle;
1561                 wil_dbg_txrx(wil,  "Ring[%2d] not idle %d -> %d\n",
1562                              vring_index, used, used + nr_frags + 1);
1563         }
1564
1565         /* advance swhead */
1566         wil_vring_advance_head(vring, nr_frags + 1);
1567         wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead,
1568                      vring->swhead);
1569         trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags);
1570
1571         /* make sure all writes to descriptors (shared memory) are done before
1572          * committing them to HW
1573          */
1574         wmb();
1575
1576         wil_w(wil, vring->hwtail, vring->swhead);
1577
1578         return 0;
1579  dma_error:
1580         /* unmap what we have mapped */
1581         nr_frags = f + 1; /* frags mapped + one for skb head */
1582         for (f = 0; f < nr_frags; f++) {
1583                 struct wil_ctx *ctx;
1584
1585                 i = (swhead + f) % vring->size;
1586                 ctx = &vring->ctx[i];
1587                 _d = &vring->va[i].tx;
1588                 *d = *_d;
1589                 _d->dma.status = TX_DMA_STATUS_DU;
1590                 wil_txdesc_unmap(dev, d, ctx);
1591
1592                 if (ctx->skb)
1593                         dev_kfree_skb_any(ctx->skb);
1594
1595                 memset(ctx, 0, sizeof(*ctx));
1596         }
1597
1598         return -EINVAL;
1599 }
1600
1601 static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
1602                         struct sk_buff *skb)
1603 {
1604         int vring_index = vring - wil->vring_tx;
1605         struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index];
1606         int rc;
1607
1608         spin_lock(&txdata->lock);
1609
1610         rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring)
1611              (wil, vring, skb);
1612
1613         spin_unlock(&txdata->lock);
1614
1615         return rc;
1616 }
1617
1618 netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1619 {
1620         struct wil6210_priv *wil = ndev_to_wil(ndev);
1621         struct ethhdr *eth = (void *)skb->data;
1622         bool bcast = is_multicast_ether_addr(eth->h_dest);
1623         struct vring *vring;
1624         static bool pr_once_fw;
1625         int rc;
1626
1627         wil_dbg_txrx(wil, "%s()\n", __func__);
1628         if (unlikely(!test_bit(wil_status_fwready, wil->status))) {
1629                 if (!pr_once_fw) {
1630                         wil_err(wil, "FW not ready\n");
1631                         pr_once_fw = true;
1632                 }
1633                 goto drop;
1634         }
1635         if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) {
1636                 wil_err(wil, "FW not connected\n");
1637                 goto drop;
1638         }
1639         if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) {
1640                 wil_err(wil, "Xmit in monitor mode not supported\n");
1641                 goto drop;
1642         }
1643         pr_once_fw = false;
1644
1645         /* find vring */
1646         if (wil->wdev->iftype == NL80211_IFTYPE_STATION) {
1647                 /* in STA mode (ESS), all to same VRING */
1648                 vring = wil_find_tx_vring_sta(wil, skb);
1649         } else { /* direct communication, find matching VRING */
1650                 vring = bcast ? wil_find_tx_bcast(wil, skb) :
1651                                 wil_find_tx_ucast(wil, skb);
1652         }
1653         if (unlikely(!vring)) {
1654                 wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest);
1655                 goto drop;
1656         }
1657         /* set up vring entry */
1658         rc = wil_tx_vring(wil, vring, skb);
1659
1660         /* do we still have enough room in the vring? */
1661         if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) {
1662                 netif_tx_stop_all_queues(wil_to_ndev(wil));
1663                 wil_dbg_txrx(wil, "netif_tx_stop : ring full\n");
1664         }
1665
1666         switch (rc) {
1667         case 0:
1668                 /* statistics will be updated on the tx_complete */
1669                 dev_kfree_skb_any(skb);
1670                 return NETDEV_TX_OK;
1671         case -ENOMEM:
1672                 return NETDEV_TX_BUSY;
1673         default:
1674                 break; /* goto drop; */
1675         }
1676  drop:
1677         ndev->stats.tx_dropped++;
1678         dev_kfree_skb_any(skb);
1679
1680         return NET_XMIT_DROP;
1681 }
1682
1683 static inline bool wil_need_txstat(struct sk_buff *skb)
1684 {
1685         struct ethhdr *eth = (void *)skb->data;
1686
1687         return is_unicast_ether_addr(eth->h_dest) && skb->sk &&
1688                (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS);
1689 }
1690
1691 static inline void wil_consume_skb(struct sk_buff *skb, bool acked)
1692 {
1693         if (unlikely(wil_need_txstat(skb)))
1694                 skb_complete_wifi_ack(skb, acked);
1695         else
1696                 acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb);
1697 }
1698
1699 /**
1700  * Clean up transmitted skb's from the Tx VRING
1701  *
1702  * Return number of descriptors cleared
1703  *
1704  * Safe to call from IRQ
1705  */
1706 int wil_tx_complete(struct wil6210_priv *wil, int ringid)
1707 {
1708         struct net_device *ndev = wil_to_ndev(wil);
1709         struct device *dev = wil_to_dev(wil);
1710         struct vring *vring = &wil->vring_tx[ringid];
1711         struct vring_tx_data *txdata = &wil->vring_tx_data[ringid];
1712         int done = 0;
1713         int cid = wil->vring2cid_tid[ringid][0];
1714         struct wil_net_stats *stats = NULL;
1715         volatile struct vring_tx_desc *_d;
1716         int used_before_complete;
1717         int used_new;
1718
1719         if (unlikely(!vring->va)) {
1720                 wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid);
1721                 return 0;
1722         }
1723
1724         if (unlikely(!txdata->enabled)) {
1725                 wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid);
1726                 return 0;
1727         }
1728
1729         wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid);
1730
1731         used_before_complete = wil_vring_used_tx(vring);
1732
1733         if (cid < WIL6210_MAX_CID)
1734                 stats = &wil->sta[cid].stats;
1735
1736         while (!wil_vring_is_empty(vring)) {
1737                 int new_swtail;
1738                 struct wil_ctx *ctx = &vring->ctx[vring->swtail];
1739                 /**
1740                  * For the fragmented skb, HW will set DU bit only for the
1741                  * last fragment. look for it.
1742                  * In TSO the first DU will include hdr desc
1743                  */
1744                 int lf = (vring->swtail + ctx->nr_frags) % vring->size;
1745                 /* TODO: check we are not past head */
1746
1747                 _d = &vring->va[lf].tx;
1748                 if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU)))
1749                         break;
1750
1751                 new_swtail = (lf + 1) % vring->size;
1752                 while (vring->swtail != new_swtail) {
1753                         struct vring_tx_desc dd, *d = &dd;
1754                         u16 dmalen;
1755                         struct sk_buff *skb;
1756
1757                         ctx = &vring->ctx[vring->swtail];
1758                         skb = ctx->skb;
1759                         _d = &vring->va[vring->swtail].tx;
1760
1761                         *d = *_d;
1762
1763                         dmalen = le16_to_cpu(d->dma.length);
1764                         trace_wil6210_tx_done(ringid, vring->swtail, dmalen,
1765                                               d->dma.error);
1766                         wil_dbg_txrx(wil,
1767                                      "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n",
1768                                      ringid, vring->swtail, dmalen,
1769                                      d->dma.status, d->dma.error);
1770                         wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4,
1771                                           (const void *)d, sizeof(*d), false);
1772
1773                         wil_txdesc_unmap(dev, d, ctx);
1774
1775                         if (skb) {
1776                                 if (likely(d->dma.error == 0)) {
1777                                         ndev->stats.tx_packets++;
1778                                         ndev->stats.tx_bytes += skb->len;
1779                                         if (stats) {
1780                                                 stats->tx_packets++;
1781                                                 stats->tx_bytes += skb->len;
1782                                         }
1783                                 } else {
1784                                         ndev->stats.tx_errors++;
1785                                         if (stats)
1786                                                 stats->tx_errors++;
1787                                 }
1788                                 wil_consume_skb(skb, d->dma.error == 0);
1789                         }
1790                         memset(ctx, 0, sizeof(*ctx));
1791                         /* There is no need to touch HW descriptor:
1792                          * - ststus bit TX_DMA_STATUS_DU is set by design,
1793                          *   so hardware will not try to process this desc.,
1794                          * - rest of descriptor will be initialized on Tx.
1795                          */
1796                         vring->swtail = wil_vring_next_tail(vring);
1797                         done++;
1798                 }
1799         }
1800
1801         /* performance monitoring */
1802         used_new = wil_vring_used_tx(vring);
1803         if (wil_val_in_range(vring_idle_trsh,
1804                              used_new, used_before_complete)) {
1805                 wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n",
1806                              ringid, used_before_complete, used_new);
1807                 txdata->last_idle = get_cycles();
1808         }
1809
1810         if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) {
1811                 wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n");
1812                 netif_tx_wake_all_queues(wil_to_ndev(wil));
1813         }
1814
1815         return done;
1816 }