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17#include <linux/etherdevice.h>
18#include <linux/moduleparam.h>
19#include <linux/prefetch.h>
20#include <linux/types.h>
21#include <linux/list.h>
22#include <linux/ip.h>
23#include <linux/ipv6.h>
24#include "wil6210.h"
25#include "txrx_edma.h"
26#include "txrx.h"
27#include "trace.h"
28
29
30
31
32#define WIL_EDMA_TX_SRING_UPDATE_HW_TAIL 128
33#define WIL_EDMA_MAX_DATA_OFFSET (2)
34
35#define WIL_EDMA_RX_BUF_LEN_DEFAULT (2048)
36#define MAX_INVALID_BUFF_ID_RETRY (3)
37
38static void wil_tx_desc_unmap_edma(struct device *dev,
39 union wil_tx_desc *desc,
40 struct wil_ctx *ctx)
41{
42 struct wil_tx_enhanced_desc *d = (struct wil_tx_enhanced_desc *)desc;
43 dma_addr_t pa = wil_tx_desc_get_addr_edma(&d->dma);
44 u16 dmalen = le16_to_cpu(d->dma.length);
45
46 switch (ctx->mapped_as) {
47 case wil_mapped_as_single:
48 dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE);
49 break;
50 case wil_mapped_as_page:
51 dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
52 break;
53 default:
54 break;
55 }
56}
57
58static int wil_find_free_sring(struct wil6210_priv *wil)
59{
60 int i;
61
62 for (i = 0; i < WIL6210_MAX_STATUS_RINGS; i++) {
63 if (!wil->srings[i].va)
64 return i;
65 }
66
67 return -EINVAL;
68}
69
70static void wil_sring_free(struct wil6210_priv *wil,
71 struct wil_status_ring *sring)
72{
73 struct device *dev = wil_to_dev(wil);
74 size_t sz;
75
76 if (!sring || !sring->va)
77 return;
78
79 sz = sring->elem_size * sring->size;
80
81 wil_dbg_misc(wil, "status_ring_free, size(bytes)=%zu, 0x%p:%pad\n",
82 sz, sring->va, &sring->pa);
83
84 dma_free_coherent(dev, sz, (void *)sring->va, sring->pa);
85 sring->pa = 0;
86 sring->va = NULL;
87}
88
89static int wil_sring_alloc(struct wil6210_priv *wil,
90 struct wil_status_ring *sring)
91{
92 struct device *dev = wil_to_dev(wil);
93 size_t sz = sring->elem_size * sring->size;
94
95 wil_dbg_misc(wil, "status_ring_alloc: size=%zu\n", sz);
96
97 if (sz == 0) {
98 wil_err(wil, "Cannot allocate a zero size status ring\n");
99 return -EINVAL;
100 }
101
102 sring->swhead = 0;
103
104
105
106
107 sring->va = dma_alloc_coherent(dev, sz, &sring->pa, GFP_KERNEL);
108 if (!sring->va)
109 return -ENOMEM;
110
111 wil_dbg_misc(wil, "status_ring[%d] 0x%p:%pad\n", sring->size, sring->va,
112 &sring->pa);
113
114 return 0;
115}
116
117static int wil_tx_init_edma(struct wil6210_priv *wil)
118{
119 int ring_id = wil_find_free_sring(wil);
120 struct wil_status_ring *sring;
121 int rc;
122 u16 status_ring_size;
123
124 if (wil->tx_status_ring_order < WIL_SRING_SIZE_ORDER_MIN ||
125 wil->tx_status_ring_order > WIL_SRING_SIZE_ORDER_MAX)
126 wil->tx_status_ring_order = WIL_TX_SRING_SIZE_ORDER_DEFAULT;
127
128 status_ring_size = 1 << wil->tx_status_ring_order;
129
130 wil_dbg_misc(wil, "init TX sring: size=%u, ring_id=%u\n",
131 status_ring_size, ring_id);
132
133 if (ring_id < 0)
134 return ring_id;
135
136
137
138
139 sring = &wil->srings[ring_id];
140
141 sring->is_rx = false;
142 sring->size = status_ring_size;
143 sring->elem_size = sizeof(struct wil_ring_tx_status);
144 rc = wil_sring_alloc(wil, sring);
145 if (rc)
146 return rc;
147
148 rc = wil_wmi_tx_sring_cfg(wil, ring_id);
149 if (rc)
150 goto out_free;
151
152 sring->desc_rdy_pol = 1;
153 wil->tx_sring_idx = ring_id;
154
155 return 0;
156out_free:
157 wil_sring_free(wil, sring);
158 return rc;
159}
160
161
162
163
164static int wil_ring_alloc_skb_edma(struct wil6210_priv *wil,
165 struct wil_ring *ring, u32 i)
166{
167 struct device *dev = wil_to_dev(wil);
168 unsigned int sz = wil->rx_buf_len;
169 dma_addr_t pa;
170 u16 buff_id;
171 struct list_head *active = &wil->rx_buff_mgmt.active;
172 struct list_head *free = &wil->rx_buff_mgmt.free;
173 struct wil_rx_buff *rx_buff;
174 struct wil_rx_buff *buff_arr = wil->rx_buff_mgmt.buff_arr;
175 struct sk_buff *skb;
176 struct wil_rx_enhanced_desc dd, *d = ⅆ
177 struct wil_rx_enhanced_desc *_d = (struct wil_rx_enhanced_desc *)
178 &ring->va[i].rx.enhanced;
179
180 if (unlikely(list_empty(free))) {
181 wil->rx_buff_mgmt.free_list_empty_cnt++;
182 return -EAGAIN;
183 }
184
185 skb = dev_alloc_skb(sz);
186 if (unlikely(!skb))
187 return -ENOMEM;
188
189 skb_put(skb, sz);
190
191
192
193
194
195 skb->ip_summed = CHECKSUM_NONE;
196
197 pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE);
198 if (unlikely(dma_mapping_error(dev, pa))) {
199 kfree_skb(skb);
200 return -ENOMEM;
201 }
202
203
204 rx_buff = list_first_entry(free, struct wil_rx_buff, list);
205 buff_id = rx_buff->id;
206
207
208 list_move(&rx_buff->list, active);
209
210 buff_arr[buff_id].skb = skb;
211
212 wil_desc_set_addr_edma(&d->dma.addr, &d->dma.addr_high_high, pa);
213 d->dma.length = cpu_to_le16(sz);
214 d->mac.buff_id = cpu_to_le16(buff_id);
215 *_d = *d;
216
217
218 memcpy(skb->cb, &pa, sizeof(pa));
219
220 return 0;
221}
222
223static inline
224void wil_get_next_rx_status_msg(struct wil_status_ring *sring, void *msg)
225{
226 memcpy(msg, (void *)(sring->va + (sring->elem_size * sring->swhead)),
227 sring->elem_size);
228}
229
230static inline void wil_sring_advance_swhead(struct wil_status_ring *sring)
231{
232 sring->swhead = (sring->swhead + 1) % sring->size;
233 if (sring->swhead == 0)
234 sring->desc_rdy_pol = 1 - sring->desc_rdy_pol;
235}
236
237static int wil_rx_refill_edma(struct wil6210_priv *wil)
238{
239 struct wil_ring *ring = &wil->ring_rx;
240 u32 next_head;
241 int rc = 0;
242 ring->swtail = *ring->edma_rx_swtail.va;
243
244 for (; next_head = wil_ring_next_head(ring),
245 (next_head != ring->swtail);
246 ring->swhead = next_head) {
247 rc = wil_ring_alloc_skb_edma(wil, ring, ring->swhead);
248 if (unlikely(rc)) {
249 if (rc == -EAGAIN)
250 wil_dbg_txrx(wil, "No free buffer ID found\n");
251 else
252 wil_err_ratelimited(wil,
253 "Error %d in refill desc[%d]\n",
254 rc, ring->swhead);
255 break;
256 }
257 }
258
259
260
261
262 wmb();
263
264 wil_w(wil, ring->hwtail, ring->swhead);
265
266 return rc;
267}
268
269static void wil_move_all_rx_buff_to_free_list(struct wil6210_priv *wil,
270 struct wil_ring *ring)
271{
272 struct device *dev = wil_to_dev(wil);
273 struct list_head *active = &wil->rx_buff_mgmt.active;
274 dma_addr_t pa;
275
276 if (!wil->rx_buff_mgmt.buff_arr)
277 return;
278
279 while (!list_empty(active)) {
280 struct wil_rx_buff *rx_buff =
281 list_first_entry(active, struct wil_rx_buff, list);
282 struct sk_buff *skb = rx_buff->skb;
283
284 if (unlikely(!skb)) {
285 wil_err(wil, "No Rx skb at buff_id %d\n", rx_buff->id);
286 } else {
287 rx_buff->skb = NULL;
288 memcpy(&pa, skb->cb, sizeof(pa));
289 dma_unmap_single(dev, pa, wil->rx_buf_len,
290 DMA_FROM_DEVICE);
291 kfree_skb(skb);
292 }
293
294
295 list_move(&rx_buff->list, &wil->rx_buff_mgmt.free);
296 }
297}
298
299static void wil_free_rx_buff_arr(struct wil6210_priv *wil)
300{
301 struct wil_ring *ring = &wil->ring_rx;
302
303 if (!wil->rx_buff_mgmt.buff_arr)
304 return;
305
306
307
308
309 wil_move_all_rx_buff_to_free_list(wil, ring);
310
311 kfree(wil->rx_buff_mgmt.buff_arr);
312 wil->rx_buff_mgmt.buff_arr = NULL;
313}
314
315static int wil_init_rx_buff_arr(struct wil6210_priv *wil,
316 size_t size)
317{
318 struct wil_rx_buff *buff_arr;
319 struct list_head *active = &wil->rx_buff_mgmt.active;
320 struct list_head *free = &wil->rx_buff_mgmt.free;
321 int i;
322
323 wil->rx_buff_mgmt.buff_arr = kcalloc(size + 1,
324 sizeof(struct wil_rx_buff),
325 GFP_KERNEL);
326 if (!wil->rx_buff_mgmt.buff_arr)
327 return -ENOMEM;
328
329
330 INIT_LIST_HEAD(active);
331 INIT_LIST_HEAD(free);
332
333
334
335
336 buff_arr = wil->rx_buff_mgmt.buff_arr;
337 for (i = 1; i <= size; i++) {
338 list_add(&buff_arr[i].list, free);
339 buff_arr[i].id = i;
340 }
341
342 wil->rx_buff_mgmt.size = size + 1;
343
344 return 0;
345}
346
347static int wil_init_rx_sring(struct wil6210_priv *wil,
348 u16 status_ring_size,
349 size_t elem_size,
350 u16 ring_id)
351{
352 struct wil_status_ring *sring = &wil->srings[ring_id];
353 int rc;
354
355 wil_dbg_misc(wil, "init RX sring: size=%u, ring_id=%u\n",
356 status_ring_size, ring_id);
357
358 memset(&sring->rx_data, 0, sizeof(sring->rx_data));
359
360 sring->is_rx = true;
361 sring->size = status_ring_size;
362 sring->elem_size = elem_size;
363 rc = wil_sring_alloc(wil, sring);
364 if (rc)
365 return rc;
366
367 rc = wil_wmi_rx_sring_add(wil, ring_id);
368 if (rc)
369 goto out_free;
370
371 sring->desc_rdy_pol = 1;
372
373 return 0;
374out_free:
375 wil_sring_free(wil, sring);
376 return rc;
377}
378
379static int wil_ring_alloc_desc_ring(struct wil6210_priv *wil,
380 struct wil_ring *ring)
381{
382 struct device *dev = wil_to_dev(wil);
383 size_t sz = ring->size * sizeof(ring->va[0]);
384
385 wil_dbg_misc(wil, "alloc_desc_ring:\n");
386
387 BUILD_BUG_ON(sizeof(ring->va[0]) != 32);
388
389 ring->swhead = 0;
390 ring->swtail = 0;
391 ring->ctx = kcalloc(ring->size, sizeof(ring->ctx[0]), GFP_KERNEL);
392 if (!ring->ctx)
393 goto err;
394
395 ring->va = dma_alloc_coherent(dev, sz, &ring->pa, GFP_KERNEL);
396 if (!ring->va)
397 goto err_free_ctx;
398
399 if (ring->is_rx) {
400 sz = sizeof(*ring->edma_rx_swtail.va);
401 ring->edma_rx_swtail.va =
402 dma_alloc_coherent(dev, sz, &ring->edma_rx_swtail.pa,
403 GFP_KERNEL);
404 if (!ring->edma_rx_swtail.va)
405 goto err_free_va;
406 }
407
408 wil_dbg_misc(wil, "%s ring[%d] 0x%p:%pad 0x%p\n",
409 ring->is_rx ? "RX" : "TX",
410 ring->size, ring->va, &ring->pa, ring->ctx);
411
412 return 0;
413err_free_va:
414 dma_free_coherent(dev, ring->size * sizeof(ring->va[0]),
415 (void *)ring->va, ring->pa);
416 ring->va = NULL;
417err_free_ctx:
418 kfree(ring->ctx);
419 ring->ctx = NULL;
420err:
421 return -ENOMEM;
422}
423
424static void wil_ring_free_edma(struct wil6210_priv *wil, struct wil_ring *ring)
425{
426 struct device *dev = wil_to_dev(wil);
427 size_t sz;
428 int ring_index = 0;
429
430 if (!ring->va)
431 return;
432
433 sz = ring->size * sizeof(ring->va[0]);
434
435 lockdep_assert_held(&wil->mutex);
436 if (ring->is_rx) {
437 wil_dbg_misc(wil, "free Rx ring [%d] 0x%p:%pad 0x%p\n",
438 ring->size, ring->va,
439 &ring->pa, ring->ctx);
440
441 wil_move_all_rx_buff_to_free_list(wil, ring);
442 dma_free_coherent(dev, sizeof(*ring->edma_rx_swtail.va),
443 ring->edma_rx_swtail.va,
444 ring->edma_rx_swtail.pa);
445 goto out;
446 }
447
448
449 ring_index = ring - wil->ring_tx;
450
451 wil_dbg_misc(wil, "free Tx ring %d [%d] 0x%p:%pad 0x%p\n",
452 ring_index, ring->size, ring->va,
453 &ring->pa, ring->ctx);
454
455 while (!wil_ring_is_empty(ring)) {
456 struct wil_ctx *ctx;
457
458 struct wil_tx_enhanced_desc dd, *d = ⅆ
459 struct wil_tx_enhanced_desc *_d =
460 (struct wil_tx_enhanced_desc *)
461 &ring->va[ring->swtail].tx.enhanced;
462
463 ctx = &ring->ctx[ring->swtail];
464 if (!ctx) {
465 wil_dbg_txrx(wil,
466 "ctx(%d) was already completed\n",
467 ring->swtail);
468 ring->swtail = wil_ring_next_tail(ring);
469 continue;
470 }
471 *d = *_d;
472 wil_tx_desc_unmap_edma(dev, (union wil_tx_desc *)d, ctx);
473 if (ctx->skb)
474 dev_kfree_skb_any(ctx->skb);
475 ring->swtail = wil_ring_next_tail(ring);
476 }
477
478out:
479 dma_free_coherent(dev, sz, (void *)ring->va, ring->pa);
480 kfree(ring->ctx);
481 ring->pa = 0;
482 ring->va = NULL;
483 ring->ctx = NULL;
484}
485
486static int wil_init_rx_desc_ring(struct wil6210_priv *wil, u16 desc_ring_size,
487 int status_ring_id)
488{
489 struct wil_ring *ring = &wil->ring_rx;
490 int rc;
491
492 wil_dbg_misc(wil, "init RX desc ring\n");
493
494 ring->size = desc_ring_size;
495 ring->is_rx = true;
496 rc = wil_ring_alloc_desc_ring(wil, ring);
497 if (rc)
498 return rc;
499
500 rc = wil_wmi_rx_desc_ring_add(wil, status_ring_id);
501 if (rc)
502 goto out_free;
503
504 return 0;
505out_free:
506 wil_ring_free_edma(wil, ring);
507 return rc;
508}
509
510static void wil_get_reorder_params_edma(struct wil6210_priv *wil,
511 struct sk_buff *skb, int *tid,
512 int *cid, int *mid, u16 *seq,
513 int *mcast, int *retry)
514{
515 struct wil_rx_status_extended *s = wil_skb_rxstatus(skb);
516
517 *tid = wil_rx_status_get_tid(s);
518 *cid = wil_rx_status_get_cid(s);
519 *mid = wil_rx_status_get_mid(s);
520 *seq = le16_to_cpu(wil_rx_status_get_seq(wil, s));
521 *mcast = wil_rx_status_get_mcast(s);
522 *retry = wil_rx_status_get_retry(s);
523}
524
525static void wil_get_netif_rx_params_edma(struct sk_buff *skb, int *cid,
526 int *security)
527{
528 struct wil_rx_status_extended *s = wil_skb_rxstatus(skb);
529
530 *cid = wil_rx_status_get_cid(s);
531 *security = wil_rx_status_get_security(s);
532}
533
534static int wil_rx_crypto_check_edma(struct wil6210_priv *wil,
535 struct sk_buff *skb)
536{
537 struct wil_rx_status_extended *st;
538 int cid, tid, key_id, mc;
539 struct wil_sta_info *s;
540 struct wil_tid_crypto_rx *c;
541 struct wil_tid_crypto_rx_single *cc;
542 const u8 *pn;
543
544
545 if (wil->use_rx_hw_reordering)
546 return 0;
547
548 st = wil_skb_rxstatus(skb);
549
550 cid = wil_rx_status_get_cid(st);
551 tid = wil_rx_status_get_tid(st);
552 key_id = wil_rx_status_get_key_id(st);
553 mc = wil_rx_status_get_mcast(st);
554 s = &wil->sta[cid];
555 c = mc ? &s->group_crypto_rx : &s->tid_crypto_rx[tid];
556 cc = &c->key_id[key_id];
557 pn = (u8 *)&st->ext.pn_15_0;
558
559 if (!cc->key_set) {
560 wil_err_ratelimited(wil,
561 "Key missing. CID %d TID %d MCast %d KEY_ID %d\n",
562 cid, tid, mc, key_id);
563 return -EINVAL;
564 }
565
566 if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) {
567 wil_err_ratelimited(wil,
568 "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n",
569 cid, tid, mc, key_id, pn, cc->pn);
570 return -EINVAL;
571 }
572 memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN);
573
574 return 0;
575}
576
577static bool wil_is_rx_idle_edma(struct wil6210_priv *wil)
578{
579 struct wil_status_ring *sring;
580 struct wil_rx_status_extended msg1;
581 void *msg = &msg1;
582 u8 dr_bit;
583 int i;
584
585 for (i = 0; i < wil->num_rx_status_rings; i++) {
586 sring = &wil->srings[i];
587 if (!sring->va)
588 continue;
589
590 wil_get_next_rx_status_msg(sring, msg);
591 dr_bit = wil_rx_status_get_desc_rdy_bit(msg);
592
593
594 if (dr_bit == sring->desc_rdy_pol)
595 return false;
596 }
597
598 return true;
599}
600
601static void wil_rx_buf_len_init_edma(struct wil6210_priv *wil)
602{
603
604 wil->rx_buf_len = rx_large_buf ?
605 WIL_MAX_ETH_MTU : WIL_EDMA_RX_BUF_LEN_DEFAULT;
606}
607
608static int wil_rx_init_edma(struct wil6210_priv *wil, uint desc_ring_order)
609{
610 u16 status_ring_size, desc_ring_size = 1 << desc_ring_order;
611 struct wil_ring *ring = &wil->ring_rx;
612 int rc;
613 size_t elem_size = wil->use_compressed_rx_status ?
614 sizeof(struct wil_rx_status_compressed) :
615 sizeof(struct wil_rx_status_extended);
616 int i;
617
618
619 if (wil->use_compressed_rx_status && !wil->use_rx_hw_reordering) {
620 wil_err(wil,
621 "compressed RX status cannot be used with SW reorder\n");
622 return -EINVAL;
623 }
624 if (wil->rx_status_ring_order <= desc_ring_order)
625
626 wil->rx_status_ring_order = desc_ring_order + 1;
627 if (wil->rx_buff_id_count <= desc_ring_size)
628
629 wil->rx_buff_id_count = desc_ring_size + 512;
630 if (wil->rx_status_ring_order < WIL_SRING_SIZE_ORDER_MIN ||
631 wil->rx_status_ring_order > WIL_SRING_SIZE_ORDER_MAX)
632 wil->rx_status_ring_order = WIL_RX_SRING_SIZE_ORDER_DEFAULT;
633
634 status_ring_size = 1 << wil->rx_status_ring_order;
635
636 wil_dbg_misc(wil,
637 "rx_init, desc_ring_size=%u, status_ring_size=%u, elem_size=%zu\n",
638 desc_ring_size, status_ring_size, elem_size);
639
640 wil_rx_buf_len_init_edma(wil);
641
642
643 if (wil->num_rx_status_rings > WIL6210_MAX_STATUS_RINGS - 1)
644 wil->num_rx_status_rings = WIL6210_MAX_STATUS_RINGS - 1;
645
646 wil_dbg_misc(wil, "rx_init: allocate %d status rings\n",
647 wil->num_rx_status_rings);
648
649 rc = wil_wmi_cfg_def_rx_offload(wil, wil->rx_buf_len);
650 if (rc)
651 return rc;
652
653
654 for (i = 0; i < wil->num_rx_status_rings; i++) {
655 int sring_id = wil_find_free_sring(wil);
656
657 if (sring_id < 0) {
658 rc = -EFAULT;
659 goto err_free_status;
660 }
661 rc = wil_init_rx_sring(wil, status_ring_size, elem_size,
662 sring_id);
663 if (rc)
664 goto err_free_status;
665 }
666
667
668 rc = wil_init_rx_desc_ring(wil, desc_ring_size,
669 WIL_DEFAULT_RX_STATUS_RING_ID);
670 if (rc)
671 goto err_free_status;
672
673 if (wil->rx_buff_id_count >= status_ring_size) {
674 wil_info(wil,
675 "rx_buff_id_count %d exceeds sring_size %d. set it to %d\n",
676 wil->rx_buff_id_count, status_ring_size,
677 status_ring_size - 1);
678 wil->rx_buff_id_count = status_ring_size - 1;
679 }
680
681
682 rc = wil_init_rx_buff_arr(wil, wil->rx_buff_id_count);
683 if (rc)
684 goto err_free_desc;
685
686
687 rc = wil_rx_refill_edma(wil);
688 if (rc)
689 goto err_free_rx_buff_arr;
690
691 return 0;
692err_free_rx_buff_arr:
693 wil_free_rx_buff_arr(wil);
694err_free_desc:
695 wil_ring_free_edma(wil, ring);
696err_free_status:
697 for (i = 0; i < wil->num_rx_status_rings; i++)
698 wil_sring_free(wil, &wil->srings[i]);
699
700 return rc;
701}
702
703static int wil_ring_init_tx_edma(struct wil6210_vif *vif, int ring_id,
704 int size, int cid, int tid)
705{
706 struct wil6210_priv *wil = vif_to_wil(vif);
707 int rc;
708 struct wil_ring *ring = &wil->ring_tx[ring_id];
709 struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id];
710
711 lockdep_assert_held(&wil->mutex);
712
713 wil_dbg_misc(wil,
714 "init TX ring: ring_id=%u, cid=%u, tid=%u, sring_id=%u\n",
715 ring_id, cid, tid, wil->tx_sring_idx);
716
717 wil_tx_data_init(txdata);
718 ring->size = size;
719 rc = wil_ring_alloc_desc_ring(wil, ring);
720 if (rc)
721 goto out;
722
723 wil->ring2cid_tid[ring_id][0] = cid;
724 wil->ring2cid_tid[ring_id][1] = tid;
725 if (!vif->privacy)
726 txdata->dot1x_open = true;
727
728 rc = wil_wmi_tx_desc_ring_add(vif, ring_id, cid, tid);
729 if (rc) {
730 wil_err(wil, "WMI_TX_DESC_RING_ADD_CMD failed\n");
731 goto out_free;
732 }
733
734 if (txdata->dot1x_open && agg_wsize >= 0)
735 wil_addba_tx_request(wil, ring_id, agg_wsize);
736
737 return 0;
738 out_free:
739 spin_lock_bh(&txdata->lock);
740 txdata->dot1x_open = false;
741 txdata->enabled = 0;
742 spin_unlock_bh(&txdata->lock);
743 wil_ring_free_edma(wil, ring);
744 wil->ring2cid_tid[ring_id][0] = wil->max_assoc_sta;
745 wil->ring2cid_tid[ring_id][1] = 0;
746
747 out:
748 return rc;
749}
750
751static int wil_tx_ring_modify_edma(struct wil6210_vif *vif, int ring_id,
752 int cid, int tid)
753{
754 struct wil6210_priv *wil = vif_to_wil(vif);
755
756 wil_err(wil, "ring modify is not supported for EDMA\n");
757
758 return -EOPNOTSUPP;
759}
760
761
762static int wil_check_bar(struct wil6210_priv *wil, void *msg, int cid,
763 struct sk_buff *skb, struct wil_net_stats *stats)
764{
765 u8 ftype;
766 u8 fc1;
767 int mid;
768 int tid;
769 u16 seq;
770 struct wil6210_vif *vif;
771
772 ftype = wil_rx_status_get_frame_type(wil, msg);
773 if (ftype == IEEE80211_FTYPE_DATA)
774 return 0;
775
776 fc1 = wil_rx_status_get_fc1(wil, msg);
777 mid = wil_rx_status_get_mid(msg);
778 tid = wil_rx_status_get_tid(msg);
779 seq = le16_to_cpu(wil_rx_status_get_seq(wil, msg));
780 vif = wil->vifs[mid];
781
782 if (unlikely(!vif)) {
783 wil_dbg_txrx(wil, "RX descriptor with invalid mid %d", mid);
784 return -EAGAIN;
785 }
786
787 wil_dbg_txrx(wil,
788 "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n",
789 fc1, mid, cid, tid, seq);
790 if (stats)
791 stats->rx_non_data_frame++;
792 if (wil_is_back_req(fc1)) {
793 wil_dbg_txrx(wil,
794 "BAR: MID %d CID %d TID %d Seq 0x%03x\n",
795 mid, cid, tid, seq);
796 wil_rx_bar(wil, vif, cid, tid, seq);
797 } else {
798 u32 sz = wil->use_compressed_rx_status ?
799 sizeof(struct wil_rx_status_compressed) :
800 sizeof(struct wil_rx_status_extended);
801
802
803
804
805 wil_dbg_txrx(wil,
806 "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n",
807 fc1, mid, cid, tid, seq);
808 wil_hex_dump_txrx("RxS ", DUMP_PREFIX_NONE, 32, 4,
809 (const void *)msg, sz, false);
810 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
811 skb->data, skb_headlen(skb), false);
812 }
813
814 return -EAGAIN;
815}
816
817static int wil_rx_error_check_edma(struct wil6210_priv *wil,
818 struct sk_buff *skb,
819 struct wil_net_stats *stats)
820{
821 int l2_rx_status;
822 void *msg = wil_skb_rxstatus(skb);
823
824 l2_rx_status = wil_rx_status_get_l2_rx_status(msg);
825 if (l2_rx_status != 0) {
826 wil_dbg_txrx(wil, "L2 RX error, l2_rx_status=0x%x\n",
827 l2_rx_status);
828
829 if (l2_rx_status == WIL_RX_EDMA_ERROR_MIC) {
830 wil_err_ratelimited(wil,
831 "L2 MIC/KEY error, dropping packet\n");
832 stats->rx_mic_error++;
833 }
834 if (l2_rx_status == WIL_RX_EDMA_ERROR_KEY) {
835 wil_err_ratelimited(wil,
836 "L2 KEY error, dropping packet\n");
837 stats->rx_key_error++;
838 }
839 if (l2_rx_status == WIL_RX_EDMA_ERROR_REPLAY) {
840 wil_err_ratelimited(wil,
841 "L2 REPLAY error, dropping packet\n");
842 stats->rx_replay++;
843 }
844 if (l2_rx_status == WIL_RX_EDMA_ERROR_AMSDU) {
845 wil_err_ratelimited(wil,
846 "L2 AMSDU error, dropping packet\n");
847 stats->rx_amsdu_error++;
848 }
849 return -EFAULT;
850 }
851
852 skb->ip_summed = wil_rx_status_get_checksum(msg, stats);
853
854 return 0;
855}
856
857static struct sk_buff *wil_sring_reap_rx_edma(struct wil6210_priv *wil,
858 struct wil_status_ring *sring)
859{
860 struct device *dev = wil_to_dev(wil);
861 struct wil_rx_status_extended msg1;
862 void *msg = &msg1;
863 u16 buff_id;
864 struct sk_buff *skb;
865 dma_addr_t pa;
866 struct wil_ring_rx_data *rxdata = &sring->rx_data;
867 unsigned int sz = wil->rx_buf_len;
868 struct wil_net_stats *stats = NULL;
869 u16 dmalen;
870 int cid;
871 bool eop, headstolen;
872 int delta;
873 u8 dr_bit;
874 u8 data_offset;
875 struct wil_rx_status_extended *s;
876 u16 sring_idx = sring - wil->srings;
877
878 BUILD_BUG_ON(sizeof(struct wil_rx_status_extended) > sizeof(skb->cb));
879
880again:
881 wil_get_next_rx_status_msg(sring, msg);
882 dr_bit = wil_rx_status_get_desc_rdy_bit(msg);
883
884
885 if (dr_bit != sring->desc_rdy_pol)
886 return NULL;
887
888
889 buff_id = le16_to_cpu(wil_rx_status_get_buff_id(msg));
890
891 while (!buff_id) {
892 struct wil_rx_status_extended *s;
893 int invalid_buff_id_retry = 0;
894
895 wil_dbg_txrx(wil,
896 "buff_id is not updated yet by HW, (swhead 0x%x)\n",
897 sring->swhead);
898 if (++invalid_buff_id_retry > MAX_INVALID_BUFF_ID_RETRY)
899 break;
900
901
902 s = (struct wil_rx_status_extended *)
903 (sring->va + (sring->elem_size * sring->swhead));
904 *(struct wil_rx_status_extended *)msg = *s;
905 buff_id = le16_to_cpu(wil_rx_status_get_buff_id(msg));
906 }
907
908 if (unlikely(!wil_val_in_range(buff_id, 1, wil->rx_buff_mgmt.size))) {
909 wil_err(wil, "Corrupt buff_id=%d, sring->swhead=%d\n",
910 buff_id, sring->swhead);
911 wil_rx_status_reset_buff_id(sring);
912 wil_sring_advance_swhead(sring);
913 sring->invalid_buff_id_cnt++;
914 goto again;
915 }
916
917
918 skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb;
919 wil->rx_buff_mgmt.buff_arr[buff_id].skb = NULL;
920 if (!skb) {
921 wil_err(wil, "No Rx skb at buff_id %d\n", buff_id);
922 wil_rx_status_reset_buff_id(sring);
923
924 list_move_tail(&wil->rx_buff_mgmt.buff_arr[buff_id].list,
925 &wil->rx_buff_mgmt.free);
926 wil_sring_advance_swhead(sring);
927 sring->invalid_buff_id_cnt++;
928 goto again;
929 }
930
931 wil_rx_status_reset_buff_id(sring);
932 wil_sring_advance_swhead(sring);
933
934 memcpy(&pa, skb->cb, sizeof(pa));
935 dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE);
936 dmalen = le16_to_cpu(wil_rx_status_get_length(msg));
937
938 trace_wil6210_rx_status(wil, wil->use_compressed_rx_status, buff_id,
939 msg);
940 wil_dbg_txrx(wil, "Rx, buff_id=%u, sring_idx=%u, dmalen=%u bytes\n",
941 buff_id, sring_idx, dmalen);
942 wil_hex_dump_txrx("RxS ", DUMP_PREFIX_NONE, 32, 4,
943 (const void *)msg, wil->use_compressed_rx_status ?
944 sizeof(struct wil_rx_status_compressed) :
945 sizeof(struct wil_rx_status_extended), false);
946
947
948 list_move_tail(&wil->rx_buff_mgmt.buff_arr[buff_id].list,
949 &wil->rx_buff_mgmt.free);
950
951 eop = wil_rx_status_get_eop(msg);
952
953 cid = wil_rx_status_get_cid(msg);
954 if (unlikely(!wil_val_in_range(cid, 0, wil->max_assoc_sta))) {
955 wil_err(wil, "Corrupt cid=%d, sring->swhead=%d\n",
956 cid, sring->swhead);
957 rxdata->skipping = true;
958 goto skipping;
959 }
960 stats = &wil->sta[cid].stats;
961
962 if (unlikely(skb->len < ETH_HLEN)) {
963 wil_dbg_txrx(wil, "Short frame, len = %d\n", skb->len);
964 stats->rx_short_frame++;
965 rxdata->skipping = true;
966 goto skipping;
967 }
968
969 if (unlikely(dmalen > sz)) {
970 wil_err(wil, "Rx size too large: %d bytes!\n", dmalen);
971 stats->rx_large_frame++;
972 rxdata->skipping = true;
973 }
974
975skipping:
976
977
978
979
980
981
982
983
984 if (unlikely(rxdata->skipping)) {
985 kfree_skb(skb);
986 if (rxdata->skb) {
987 kfree_skb(rxdata->skb);
988 rxdata->skb = NULL;
989 }
990 rxdata->skipping = !eop;
991 goto again;
992 }
993
994 skb_trim(skb, dmalen);
995
996 prefetch(skb->data);
997
998 if (!rxdata->skb) {
999 rxdata->skb = skb;
1000 } else {
1001 if (likely(skb_try_coalesce(rxdata->skb, skb, &headstolen,
1002 &delta))) {
1003 kfree_skb_partial(skb, headstolen);
1004 } else {
1005 wil_err(wil, "failed to merge skbs!\n");
1006 kfree_skb(skb);
1007 kfree_skb(rxdata->skb);
1008 rxdata->skb = NULL;
1009 rxdata->skipping = !eop;
1010 goto again;
1011 }
1012 }
1013
1014 if (!eop)
1015 goto again;
1016
1017
1018 skb = rxdata->skb;
1019 rxdata->skb = NULL;
1020 rxdata->skipping = false;
1021
1022 if (stats) {
1023 stats->last_mcs_rx = wil_rx_status_get_mcs(msg);
1024 if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs))
1025 stats->rx_per_mcs[stats->last_mcs_rx]++;
1026 }
1027
1028 if (!wil->use_rx_hw_reordering && !wil->use_compressed_rx_status &&
1029 wil_check_bar(wil, msg, cid, skb, stats) == -EAGAIN) {
1030 kfree_skb(skb);
1031 goto again;
1032 }
1033
1034
1035
1036
1037 data_offset = wil_rx_status_get_data_offset(msg);
1038 if (data_offset == 0xFF ||
1039 data_offset > WIL_EDMA_MAX_DATA_OFFSET) {
1040 wil_err(wil, "Unexpected data offset %d\n", data_offset);
1041 kfree_skb(skb);
1042 goto again;
1043 }
1044
1045 skb_pull(skb, data_offset);
1046
1047 wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
1048 skb->data, skb_headlen(skb), false);
1049
1050
1051
1052
1053 s = wil_skb_rxstatus(skb);
1054 memcpy(s, msg, sring->elem_size);
1055
1056 return skb;
1057}
1058
1059void wil_rx_handle_edma(struct wil6210_priv *wil, int *quota)
1060{
1061 struct net_device *ndev;
1062 struct wil_ring *ring = &wil->ring_rx;
1063 struct wil_status_ring *sring;
1064 struct sk_buff *skb;
1065 int i;
1066
1067 if (unlikely(!ring->va)) {
1068 wil_err(wil, "Rx IRQ while Rx not yet initialized\n");
1069 return;
1070 }
1071 wil_dbg_txrx(wil, "rx_handle\n");
1072
1073 for (i = 0; i < wil->num_rx_status_rings; i++) {
1074 sring = &wil->srings[i];
1075 if (unlikely(!sring->va)) {
1076 wil_err(wil,
1077 "Rx IRQ while Rx status ring %d not yet initialized\n",
1078 i);
1079 continue;
1080 }
1081
1082 while ((*quota > 0) &&
1083 (NULL != (skb =
1084 wil_sring_reap_rx_edma(wil, sring)))) {
1085 (*quota)--;
1086 if (wil->use_rx_hw_reordering) {
1087 void *msg = wil_skb_rxstatus(skb);
1088 int mid = wil_rx_status_get_mid(msg);
1089 struct wil6210_vif *vif = wil->vifs[mid];
1090
1091 if (unlikely(!vif)) {
1092 wil_dbg_txrx(wil,
1093 "RX desc invalid mid %d",
1094 mid);
1095 kfree_skb(skb);
1096 continue;
1097 }
1098 ndev = vif_to_ndev(vif);
1099 wil_netif_rx_any(skb, ndev);
1100 } else {
1101 wil_rx_reorder(wil, skb);
1102 }
1103 }
1104
1105 wil_w(wil, sring->hwtail, (sring->swhead - 1) % sring->size);
1106 }
1107
1108 wil_rx_refill_edma(wil);
1109}
1110
1111static int wil_tx_desc_map_edma(union wil_tx_desc *desc,
1112 dma_addr_t pa,
1113 u32 len,
1114 int ring_index)
1115{
1116 struct wil_tx_enhanced_desc *d =
1117 (struct wil_tx_enhanced_desc *)&desc->enhanced;
1118
1119 memset(d, 0, sizeof(struct wil_tx_enhanced_desc));
1120
1121 wil_desc_set_addr_edma(&d->dma.addr, &d->dma.addr_high_high, pa);
1122
1123
1124 d->dma.length = cpu_to_le16((u16)len);
1125 d->mac.d[0] = (ring_index << WIL_EDMA_DESC_TX_MAC_CFG_0_QID_POS);
1126
1127
1128
1129 d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) |
1130 (0x3 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS);
1131
1132 return 0;
1133}
1134
1135static inline void
1136wil_get_next_tx_status_msg(struct wil_status_ring *sring,
1137 struct wil_ring_tx_status *msg)
1138{
1139 struct wil_ring_tx_status *_msg = (struct wil_ring_tx_status *)
1140 (sring->va + (sring->elem_size * sring->swhead));
1141
1142 *msg = *_msg;
1143}
1144
1145
1146
1147
1148
1149int wil_tx_sring_handler(struct wil6210_priv *wil,
1150 struct wil_status_ring *sring)
1151{
1152 struct net_device *ndev;
1153 struct device *dev = wil_to_dev(wil);
1154 struct wil_ring *ring = NULL;
1155 struct wil_ring_tx_data *txdata;
1156
1157 int desc_cnt = 0;
1158 int cid;
1159 struct wil_net_stats *stats;
1160 struct wil_tx_enhanced_desc *_d;
1161 unsigned int ring_id;
1162 unsigned int num_descs, num_statuses = 0;
1163 int i;
1164 u8 dr_bit;
1165 struct wil_ring_tx_status msg;
1166 struct wil6210_vif *vif;
1167 int used_before_complete;
1168 int used_new;
1169
1170 wil_get_next_tx_status_msg(sring, &msg);
1171 dr_bit = msg.desc_ready >> TX_STATUS_DESC_READY_POS;
1172
1173
1174 while (dr_bit == sring->desc_rdy_pol) {
1175 num_descs = msg.num_descriptors;
1176 if (!num_descs) {
1177 wil_err(wil, "invalid num_descs 0\n");
1178 goto again;
1179 }
1180
1181
1182 ring_id = msg.ring_id;
1183
1184 if (unlikely(ring_id >= WIL6210_MAX_TX_RINGS)) {
1185 wil_err(wil, "invalid ring id %d\n", ring_id);
1186 goto again;
1187 }
1188 ring = &wil->ring_tx[ring_id];
1189 if (unlikely(!ring->va)) {
1190 wil_err(wil, "Tx irq[%d]: ring not initialized\n",
1191 ring_id);
1192 goto again;
1193 }
1194 txdata = &wil->ring_tx_data[ring_id];
1195 if (unlikely(!txdata->enabled)) {
1196 wil_info(wil, "Tx irq[%d]: ring disabled\n", ring_id);
1197 goto again;
1198 }
1199 vif = wil->vifs[txdata->mid];
1200 if (unlikely(!vif)) {
1201 wil_dbg_txrx(wil, "invalid MID %d for ring %d\n",
1202 txdata->mid, ring_id);
1203 goto again;
1204 }
1205
1206 ndev = vif_to_ndev(vif);
1207
1208 cid = wil->ring2cid_tid[ring_id][0];
1209 stats = (cid < wil->max_assoc_sta) ? &wil->sta[cid].stats :
1210 NULL;
1211
1212 wil_dbg_txrx(wil,
1213 "tx_status: completed desc_ring (%d), num_descs (%d)\n",
1214 ring_id, num_descs);
1215
1216 used_before_complete = wil_ring_used_tx(ring);
1217
1218 for (i = 0 ; i < num_descs; ++i) {
1219 struct wil_ctx *ctx = &ring->ctx[ring->swtail];
1220 struct wil_tx_enhanced_desc dd, *d = ⅆ
1221 u16 dmalen;
1222 struct sk_buff *skb = ctx->skb;
1223
1224 _d = (struct wil_tx_enhanced_desc *)
1225 &ring->va[ring->swtail].tx.enhanced;
1226 *d = *_d;
1227
1228 dmalen = le16_to_cpu(d->dma.length);
1229 trace_wil6210_tx_status(&msg, ring->swtail, dmalen);
1230 wil_dbg_txrx(wil,
1231 "TxC[%2d][%3d] : %d bytes, status 0x%02x\n",
1232 ring_id, ring->swtail, dmalen,
1233 msg.status);
1234 wil_hex_dump_txrx("TxS ", DUMP_PREFIX_NONE, 32, 4,
1235 (const void *)&msg, sizeof(msg),
1236 false);
1237
1238 wil_tx_desc_unmap_edma(dev,
1239 (union wil_tx_desc *)d,
1240 ctx);
1241
1242 if (skb) {
1243 if (likely(msg.status == 0)) {
1244 ndev->stats.tx_packets++;
1245 ndev->stats.tx_bytes += skb->len;
1246 if (stats) {
1247 stats->tx_packets++;
1248 stats->tx_bytes += skb->len;
1249
1250 wil_tx_latency_calc(wil, skb,
1251 &wil->sta[cid]);
1252 }
1253 } else {
1254 ndev->stats.tx_errors++;
1255 if (stats)
1256 stats->tx_errors++;
1257 }
1258 wil_consume_skb(skb, msg.status == 0);
1259 }
1260 memset(ctx, 0, sizeof(*ctx));
1261
1262
1263
1264
1265
1266 wmb();
1267
1268 ring->swtail = wil_ring_next_tail(ring);
1269
1270 desc_cnt++;
1271 }
1272
1273
1274 used_new = wil_ring_used_tx(ring);
1275 if (wil_val_in_range(wil->ring_idle_trsh,
1276 used_new, used_before_complete)) {
1277 wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n",
1278 ring_id, used_before_complete, used_new);
1279 txdata->last_idle = get_cycles();
1280 }
1281
1282again:
1283 num_statuses++;
1284 if (num_statuses % WIL_EDMA_TX_SRING_UPDATE_HW_TAIL == 0)
1285
1286 wil_w(wil, sring->hwtail, sring->swhead);
1287
1288 wil_sring_advance_swhead(sring);
1289
1290 wil_get_next_tx_status_msg(sring, &msg);
1291 dr_bit = msg.desc_ready >> TX_STATUS_DESC_READY_POS;
1292 }
1293
1294
1295 if (desc_cnt)
1296 wil_update_net_queues(wil, vif, NULL, false);
1297
1298 if (num_statuses % WIL_EDMA_TX_SRING_UPDATE_HW_TAIL != 0)
1299
1300 wil_w(wil, sring->hwtail, (sring->swhead - 1) % sring->size);
1301
1302 return desc_cnt;
1303}
1304
1305
1306
1307
1308
1309
1310
1311static void wil_tx_desc_offload_setup_tso_edma(struct wil_tx_enhanced_desc *d,
1312 int tso_desc_type, bool is_ipv4,
1313 int tcp_hdr_len,
1314 int skb_net_hdr_len,
1315 int mss)
1316{
1317
1318 d->mac.d[2] |= 1;
1319
1320 d->mac.tso_mss |= cpu_to_le16(mss >> 2);
1321
1322 d->dma.l4_hdr_len |= tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK;
1323
1324
1325
1326 d->dma.cmd |= BIT(WIL_EDMA_DESC_TX_CFG_EOP_POS) |
1327 tso_desc_type << WIL_EDMA_DESC_TX_CFG_TSO_DESC_TYPE_POS |
1328 BIT(WIL_EDMA_DESC_TX_CFG_SEG_EN_POS) |
1329 BIT(WIL_EDMA_DESC_TX_CFG_INSERT_IP_CHKSUM_POS) |
1330 BIT(WIL_EDMA_DESC_TX_CFG_INSERT_TCP_CHKSUM_POS);
1331
1332 d->dma.w1 |= BIT(WIL_EDMA_DESC_TX_CFG_PSEUDO_HEADER_CALC_EN_POS) |
1333 BIT(WIL_EDMA_DESC_TX_CFG_L4_TYPE_POS);
1334
1335 d->dma.ip_length |= skb_net_hdr_len;
1336
1337 d->dma.b11 |= ETH_HLEN |
1338 is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS;
1339}
1340
1341static int wil_tx_tso_gen_desc(struct wil6210_priv *wil, void *buff_addr,
1342 int len, uint i, int tso_desc_type,
1343 skb_frag_t *frag, struct wil_ring *ring,
1344 struct sk_buff *skb, bool is_ipv4,
1345 int tcp_hdr_len, int skb_net_hdr_len,
1346 int mss, int *descs_used)
1347{
1348 struct device *dev = wil_to_dev(wil);
1349 struct wil_tx_enhanced_desc *_desc = (struct wil_tx_enhanced_desc *)
1350 &ring->va[i].tx.enhanced;
1351 struct wil_tx_enhanced_desc desc_mem, *d = &desc_mem;
1352 int ring_index = ring - wil->ring_tx;
1353 dma_addr_t pa;
1354
1355 if (len == 0)
1356 return 0;
1357
1358 if (!frag) {
1359 pa = dma_map_single(dev, buff_addr, len, DMA_TO_DEVICE);
1360 ring->ctx[i].mapped_as = wil_mapped_as_single;
1361 } else {
1362 pa = skb_frag_dma_map(dev, frag, 0, len, DMA_TO_DEVICE);
1363 ring->ctx[i].mapped_as = wil_mapped_as_page;
1364 }
1365 if (unlikely(dma_mapping_error(dev, pa))) {
1366 wil_err(wil, "TSO: Skb DMA map error\n");
1367 return -EINVAL;
1368 }
1369
1370 wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa,
1371 len, ring_index);
1372 wil_tx_desc_offload_setup_tso_edma(d, tso_desc_type, is_ipv4,
1373 tcp_hdr_len,
1374 skb_net_hdr_len, mss);
1375
1376
1377
1378
1379
1380 if (tso_desc_type == wil_tso_type_lst)
1381 ring->ctx[i].skb = skb_get(skb);
1382
1383 wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4,
1384 (const void *)d, sizeof(*d), false);
1385
1386 *_desc = *d;
1387 (*descs_used)++;
1388
1389 return 0;
1390}
1391
1392static int __wil_tx_ring_tso_edma(struct wil6210_priv *wil,
1393 struct wil6210_vif *vif,
1394 struct wil_ring *ring,
1395 struct sk_buff *skb)
1396{
1397 int ring_index = ring - wil->ring_tx;
1398 struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index];
1399 int nr_frags = skb_shinfo(skb)->nr_frags;
1400 int min_desc_required = nr_frags + 2;
1401 int used, avail = wil_ring_avail_tx(ring);
1402 int f, hdrlen, headlen;
1403 int gso_type;
1404 bool is_ipv4;
1405 u32 swhead = ring->swhead;
1406 int descs_used = 0;
1407 int rc = -EINVAL;
1408 int tcp_hdr_len;
1409 int skb_net_hdr_len;
1410 int mss = skb_shinfo(skb)->gso_size;
1411
1412 wil_dbg_txrx(wil, "tx_ring_tso: %d bytes to ring %d\n", skb->len,
1413 ring_index);
1414
1415 if (unlikely(!txdata->enabled))
1416 return -EINVAL;
1417
1418 if (unlikely(avail < min_desc_required)) {
1419 wil_err_ratelimited(wil,
1420 "TSO: Tx ring[%2d] full. No space for %d fragments\n",
1421 ring_index, min_desc_required);
1422 return -ENOMEM;
1423 }
1424
1425 gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4);
1426 switch (gso_type) {
1427 case SKB_GSO_TCPV4:
1428 is_ipv4 = true;
1429 break;
1430 case SKB_GSO_TCPV6:
1431 is_ipv4 = false;
1432 break;
1433 default:
1434 return -EINVAL;
1435 }
1436
1437 if (skb->ip_summed != CHECKSUM_PARTIAL)
1438 return -EINVAL;
1439
1440
1441
1442
1443 tcp_hdr_len = tcp_hdrlen(skb);
1444 skb_net_hdr_len = skb_network_header_len(skb);
1445
1446
1447
1448
1449 hdrlen = ETH_HLEN + tcp_hdr_len + skb_net_hdr_len;
1450 wil_dbg_txrx(wil, "TSO: process header descriptor, hdrlen %u\n",
1451 hdrlen);
1452 rc = wil_tx_tso_gen_desc(wil, skb->data, hdrlen, swhead,
1453 wil_tso_type_hdr, NULL, ring, skb,
1454 is_ipv4, tcp_hdr_len, skb_net_hdr_len,
1455 mss, &descs_used);
1456 if (rc)
1457 return -EINVAL;
1458
1459
1460 headlen = skb_headlen(skb) - hdrlen;
1461 wil_dbg_txrx(wil, "TSO: process skb head, headlen %u\n", headlen);
1462 rc = wil_tx_tso_gen_desc(wil, skb->data + hdrlen, headlen,
1463 (swhead + descs_used) % ring->size,
1464 (nr_frags != 0) ? wil_tso_type_first :
1465 wil_tso_type_lst, NULL, ring, skb,
1466 is_ipv4, tcp_hdr_len, skb_net_hdr_len,
1467 mss, &descs_used);
1468 if (rc)
1469 goto mem_error;
1470
1471
1472 for (f = 0; f < nr_frags; f++) {
1473 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
1474 int len = frag->size;
1475
1476 wil_dbg_txrx(wil, "TSO: frag[%d]: len %u, descs_used %d\n", f,
1477 len, descs_used);
1478
1479 rc = wil_tx_tso_gen_desc(wil, NULL, len,
1480 (swhead + descs_used) % ring->size,
1481 (f != nr_frags - 1) ?
1482 wil_tso_type_mid : wil_tso_type_lst,
1483 frag, ring, skb, is_ipv4,
1484 tcp_hdr_len, skb_net_hdr_len,
1485 mss, &descs_used);
1486 if (rc)
1487 goto mem_error;
1488 }
1489
1490
1491 used = wil_ring_used_tx(ring);
1492 if (wil_val_in_range(wil->ring_idle_trsh,
1493 used, used + descs_used)) {
1494 txdata->idle += get_cycles() - txdata->last_idle;
1495 wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n",
1496 ring_index, used, used + descs_used);
1497 }
1498
1499
1500 wil_ring_advance_head(ring, descs_used);
1501 wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, ring->swhead);
1502
1503
1504
1505
1506 wmb();
1507
1508 if (wil->tx_latency)
1509 *(ktime_t *)&skb->cb = ktime_get();
1510 else
1511 memset(skb->cb, 0, sizeof(ktime_t));
1512
1513 wil_w(wil, ring->hwtail, ring->swhead);
1514
1515 return 0;
1516
1517mem_error:
1518 while (descs_used > 0) {
1519 struct device *dev = wil_to_dev(wil);
1520 struct wil_ctx *ctx;
1521 int i = (swhead + descs_used - 1) % ring->size;
1522 struct wil_tx_enhanced_desc dd, *d = ⅆ
1523 struct wil_tx_enhanced_desc *_desc =
1524 (struct wil_tx_enhanced_desc *)
1525 &ring->va[i].tx.enhanced;
1526
1527 *d = *_desc;
1528 ctx = &ring->ctx[i];
1529 wil_tx_desc_unmap_edma(dev, (union wil_tx_desc *)d, ctx);
1530 memset(ctx, 0, sizeof(*ctx));
1531 descs_used--;
1532 }
1533 return rc;
1534}
1535
1536static int wil_ring_init_bcast_edma(struct wil6210_vif *vif, int ring_id,
1537 int size)
1538{
1539 struct wil6210_priv *wil = vif_to_wil(vif);
1540 struct wil_ring *ring = &wil->ring_tx[ring_id];
1541 int rc;
1542 struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id];
1543
1544 wil_dbg_misc(wil, "init bcast: ring_id=%d, sring_id=%d\n",
1545 ring_id, wil->tx_sring_idx);
1546
1547 lockdep_assert_held(&wil->mutex);
1548
1549 wil_tx_data_init(txdata);
1550 ring->size = size;
1551 ring->is_rx = false;
1552 rc = wil_ring_alloc_desc_ring(wil, ring);
1553 if (rc)
1554 goto out;
1555
1556 wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID;
1557 wil->ring2cid_tid[ring_id][1] = 0;
1558 if (!vif->privacy)
1559 txdata->dot1x_open = true;
1560
1561 rc = wil_wmi_bcast_desc_ring_add(vif, ring_id);
1562 if (rc)
1563 goto out_free;
1564
1565 return 0;
1566
1567 out_free:
1568 spin_lock_bh(&txdata->lock);
1569 txdata->enabled = 0;
1570 txdata->dot1x_open = false;
1571 spin_unlock_bh(&txdata->lock);
1572 wil_ring_free_edma(wil, ring);
1573
1574out:
1575 return rc;
1576}
1577
1578static void wil_tx_fini_edma(struct wil6210_priv *wil)
1579{
1580 struct wil_status_ring *sring = &wil->srings[wil->tx_sring_idx];
1581
1582 wil_dbg_misc(wil, "free TX sring\n");
1583
1584 wil_sring_free(wil, sring);
1585}
1586
1587static void wil_rx_data_free(struct wil_status_ring *sring)
1588{
1589 if (!sring)
1590 return;
1591
1592 kfree_skb(sring->rx_data.skb);
1593 sring->rx_data.skb = NULL;
1594}
1595
1596static void wil_rx_fini_edma(struct wil6210_priv *wil)
1597{
1598 struct wil_ring *ring = &wil->ring_rx;
1599 int i;
1600
1601 wil_dbg_misc(wil, "rx_fini_edma\n");
1602
1603 wil_ring_free_edma(wil, ring);
1604
1605 for (i = 0; i < wil->num_rx_status_rings; i++) {
1606 wil_rx_data_free(&wil->srings[i]);
1607 wil_sring_free(wil, &wil->srings[i]);
1608 }
1609
1610 wil_free_rx_buff_arr(wil);
1611}
1612
1613void wil_init_txrx_ops_edma(struct wil6210_priv *wil)
1614{
1615 wil->txrx_ops.configure_interrupt_moderation =
1616 wil_configure_interrupt_moderation_edma;
1617
1618 wil->txrx_ops.ring_init_tx = wil_ring_init_tx_edma;
1619 wil->txrx_ops.ring_fini_tx = wil_ring_free_edma;
1620 wil->txrx_ops.ring_init_bcast = wil_ring_init_bcast_edma;
1621 wil->txrx_ops.tx_init = wil_tx_init_edma;
1622 wil->txrx_ops.tx_fini = wil_tx_fini_edma;
1623 wil->txrx_ops.tx_desc_map = wil_tx_desc_map_edma;
1624 wil->txrx_ops.tx_desc_unmap = wil_tx_desc_unmap_edma;
1625 wil->txrx_ops.tx_ring_tso = __wil_tx_ring_tso_edma;
1626 wil->txrx_ops.tx_ring_modify = wil_tx_ring_modify_edma;
1627
1628 wil->txrx_ops.rx_init = wil_rx_init_edma;
1629 wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp_edma;
1630 wil->txrx_ops.get_reorder_params = wil_get_reorder_params_edma;
1631 wil->txrx_ops.get_netif_rx_params = wil_get_netif_rx_params_edma;
1632 wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check_edma;
1633 wil->txrx_ops.rx_error_check = wil_rx_error_check_edma;
1634 wil->txrx_ops.is_rx_idle = wil_is_rx_idle_edma;
1635 wil->txrx_ops.rx_fini = wil_rx_fini_edma;
1636}
1637
1638