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17#define _RTL8712_RECV_C_
18
19#include <linux/if_ether.h>
20#include <linux/ip.h>
21
22#include "osdep_service.h"
23#include "drv_types.h"
24#include "recv_osdep.h"
25#include "mlme_osdep.h"
26#include "ethernet.h"
27#include "usb_ops.h"
28#include "wifi.h"
29
30
31static u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
32
33
34static u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
35
36static void recv_tasklet(void *priv);
37
38int r8712_init_recv_priv(struct recv_priv *precvpriv, struct _adapter *padapter)
39{
40 int i;
41 struct recv_buf *precvbuf;
42 int res = _SUCCESS;
43 addr_t tmpaddr = 0;
44 int alignment = 0;
45 struct sk_buff *pskb = NULL;
46
47
48 _init_queue(&precvpriv->free_recv_buf_queue);
49 precvpriv->pallocated_recv_buf =
50 kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4, GFP_ATOMIC);
51 if (!precvpriv->pallocated_recv_buf)
52 return _FAIL;
53 precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 -
54 ((addr_t)(precvpriv->pallocated_recv_buf) & 3);
55 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
56 for (i = 0; i < NR_RECVBUFF; i++) {
57 INIT_LIST_HEAD(&precvbuf->list);
58 spin_lock_init(&precvbuf->recvbuf_lock);
59 res = r8712_os_recvbuf_resource_alloc(padapter, precvbuf);
60 if (res == _FAIL)
61 break;
62 precvbuf->ref_cnt = 0;
63 precvbuf->adapter = padapter;
64 list_add_tail(&precvbuf->list,
65 &(precvpriv->free_recv_buf_queue.queue));
66 precvbuf++;
67 }
68 precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
69 tasklet_init(&precvpriv->recv_tasklet,
70 (void(*)(unsigned long))recv_tasklet,
71 (unsigned long)padapter);
72 skb_queue_head_init(&precvpriv->rx_skb_queue);
73
74 skb_queue_head_init(&precvpriv->free_recv_skb_queue);
75 for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
76 pskb = netdev_alloc_skb(padapter->pnetdev, MAX_RECVBUF_SZ +
77 RECVBUFF_ALIGN_SZ);
78 if (pskb) {
79 tmpaddr = (addr_t)pskb->data;
80 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
81 skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignment));
82 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
83 }
84 pskb = NULL;
85 }
86 return res;
87}
88
89void r8712_free_recv_priv(struct recv_priv *precvpriv)
90{
91 int i;
92 struct recv_buf *precvbuf;
93 struct _adapter *padapter = precvpriv->adapter;
94
95 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
96 for (i = 0; i < NR_RECVBUFF; i++) {
97 r8712_os_recvbuf_resource_free(padapter, precvbuf);
98 precvbuf++;
99 }
100 kfree(precvpriv->pallocated_recv_buf);
101 skb_queue_purge(&precvpriv->rx_skb_queue);
102 if (skb_queue_len(&precvpriv->rx_skb_queue))
103 netdev_warn(padapter->pnetdev, "r8712u: rx_skb_queue not empty\n");
104 skb_queue_purge(&precvpriv->free_recv_skb_queue);
105 if (skb_queue_len(&precvpriv->free_recv_skb_queue))
106 netdev_warn(padapter->pnetdev, "r8712u: free_recv_skb_queue not empty %d\n",
107 skb_queue_len(&precvpriv->free_recv_skb_queue));
108}
109
110int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
111{
112 precvbuf->transfer_len = 0;
113 precvbuf->len = 0;
114 precvbuf->ref_cnt = 0;
115 if (precvbuf->pbuf) {
116 precvbuf->pdata = precvbuf->pbuf;
117 precvbuf->phead = precvbuf->pbuf;
118 precvbuf->ptail = precvbuf->pbuf;
119 precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ;
120 }
121 return _SUCCESS;
122}
123
124int r8712_free_recvframe(union recv_frame *precvframe,
125 struct __queue *pfree_recv_queue)
126{
127 unsigned long irqL;
128 struct _adapter *padapter = precvframe->u.hdr.adapter;
129 struct recv_priv *precvpriv = &padapter->recvpriv;
130
131 if (precvframe->u.hdr.pkt) {
132 dev_kfree_skb_any(precvframe->u.hdr.pkt);
133 precvframe->u.hdr.pkt = NULL;
134 }
135 spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
136 list_del_init(&(precvframe->u.hdr.list));
137 list_add_tail(&(precvframe->u.hdr.list), &pfree_recv_queue->queue);
138 if (padapter) {
139 if (pfree_recv_queue == &precvpriv->free_recv_queue)
140 precvpriv->free_recvframe_cnt++;
141 }
142 spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
143 return _SUCCESS;
144}
145
146static void update_recvframe_attrib_from_recvstat(struct rx_pkt_attrib *pattrib,
147 struct recv_stat *prxstat)
148{
149 u16 drvinfo_sz;
150
151 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
152 drvinfo_sz <<= 3;
153
154
155
156 pattrib->bdecrypted = ((le32_to_cpu(prxstat->rxdw0) & BIT(27)) >> 27)
157 ? 0 : 1;
158 pattrib->crc_err = (le32_to_cpu(prxstat->rxdw0) & BIT(14)) >> 14;
159
160
161
162 if (le32_to_cpu(prxstat->rxdw3) & BIT(13)) {
163 pattrib->tcpchk_valid = 1;
164 if (le32_to_cpu(prxstat->rxdw3) & BIT(11))
165 pattrib->tcp_chkrpt = 1;
166 else
167 pattrib->tcp_chkrpt = 0;
168 if (le32_to_cpu(prxstat->rxdw3) & BIT(12))
169 pattrib->ip_chkrpt = 1;
170 else
171 pattrib->ip_chkrpt = 0;
172 } else {
173 pattrib->tcpchk_valid = 0;
174 }
175 pattrib->mcs_rate = (u8)((le32_to_cpu(prxstat->rxdw3)) & 0x3f);
176 pattrib->htc = (u8)((le32_to_cpu(prxstat->rxdw3) >> 14) & 0x1);
177
178
179
180}
181
182
183static union recv_frame *recvframe_defrag(struct _adapter *adapter,
184 struct __queue *defrag_q)
185{
186 struct list_head *plist, *phead;
187 u8 wlanhdr_offset;
188 u8 curfragnum;
189 struct recv_frame_hdr *pfhdr, *pnfhdr;
190 union recv_frame *prframe, *pnextrframe;
191 struct __queue *pfree_recv_queue;
192
193 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
194 phead = &defrag_q->queue;
195 plist = phead->next;
196 prframe = container_of(plist, union recv_frame, u.list);
197 list_del_init(&prframe->u.list);
198 pfhdr = &prframe->u.hdr;
199 curfragnum = 0;
200 if (curfragnum != pfhdr->attrib.frag_num) {
201
202
203
204 r8712_free_recvframe(prframe, pfree_recv_queue);
205 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
206 return NULL;
207 }
208 curfragnum++;
209 plist = &defrag_q->queue;
210 plist = plist->next;
211 while (!end_of_queue_search(phead, plist)) {
212 pnextrframe = container_of(plist, union recv_frame, u.list);
213 pnfhdr = &pnextrframe->u.hdr;
214
215 if (curfragnum != pnfhdr->attrib.frag_num) {
216
217
218
219 r8712_free_recvframe(prframe, pfree_recv_queue);
220 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
221 return NULL;
222 }
223 curfragnum++;
224
225
226
227 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
228 recvframe_pull(pnextrframe, wlanhdr_offset);
229
230
231
232 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
233 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
234 recvframe_put(prframe, pnfhdr->len);
235 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
236 plist = plist->next;
237 }
238
239 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
240 return prframe;
241}
242
243
244union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter,
245 union recv_frame *precv_frame)
246{
247 u8 ismfrag;
248 u8 fragnum;
249 u8 *psta_addr;
250 struct recv_frame_hdr *pfhdr;
251 struct sta_info *psta;
252 struct sta_priv *pstapriv;
253 struct list_head *phead;
254 union recv_frame *prtnframe = NULL;
255 struct __queue *pfree_recv_queue, *pdefrag_q;
256
257 pstapriv = &padapter->stapriv;
258 pfhdr = &precv_frame->u.hdr;
259 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
260
261 ismfrag = pfhdr->attrib.mfrag;
262 fragnum = pfhdr->attrib.frag_num;
263 psta_addr = pfhdr->attrib.ta;
264 psta = r8712_get_stainfo(pstapriv, psta_addr);
265 if (!psta)
266 pdefrag_q = NULL;
267 else
268 pdefrag_q = &psta->sta_recvpriv.defrag_q;
269
270 if ((ismfrag == 0) && (fragnum == 0))
271 prtnframe = precv_frame;
272 if (ismfrag == 1) {
273
274
275
276 if (pdefrag_q) {
277 if (fragnum == 0) {
278
279 if (!list_empty(&pdefrag_q->queue)) {
280
281 r8712_free_recvframe_queue(pdefrag_q,
282 pfree_recv_queue);
283 }
284 }
285
286 phead = &pdefrag_q->queue;
287 list_add_tail(&pfhdr->list, phead);
288 prtnframe = NULL;
289 } else {
290
291
292
293 r8712_free_recvframe(precv_frame, pfree_recv_queue);
294 prtnframe = NULL;
295 }
296
297 }
298 if ((ismfrag == 0) && (fragnum != 0)) {
299
300
301
302 if (pdefrag_q) {
303 phead = &pdefrag_q->queue;
304 list_add_tail(&pfhdr->list, phead);
305
306 precv_frame = recvframe_defrag(padapter, pdefrag_q);
307 prtnframe = precv_frame;
308 } else {
309
310
311
312 r8712_free_recvframe(precv_frame, pfree_recv_queue);
313 prtnframe = NULL;
314 }
315 }
316 if (prtnframe && (prtnframe->u.hdr.attrib.privacy)) {
317
318 if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) {
319 r8712_free_recvframe(prtnframe, pfree_recv_queue);
320 prtnframe = NULL;
321 }
322 }
323 return prtnframe;
324}
325
326static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
327{
328 int a_len, padding_len;
329 u16 eth_type, nSubframe_Length;
330 u8 nr_subframes, i;
331 unsigned char *pdata;
332 struct rx_pkt_attrib *pattrib;
333 _pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
334 struct recv_priv *precvpriv = &padapter->recvpriv;
335 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
336
337 nr_subframes = 0;
338 pattrib = &prframe->u.hdr.attrib;
339 recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);
340 if (prframe->u.hdr.attrib.iv_len > 0)
341 recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);
342 a_len = prframe->u.hdr.len;
343 pdata = prframe->u.hdr.rx_data;
344 while (a_len > ETH_HLEN) {
345
346 nSubframe_Length = *((u16 *)(pdata + 12));
347
348 nSubframe_Length = (nSubframe_Length >> 8) +
349 (nSubframe_Length << 8);
350 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
351 netdev_warn(padapter->pnetdev, "r8712u: nRemain_Length is %d and nSubframe_Length is: %d\n",
352 a_len, nSubframe_Length);
353 goto exit;
354 }
355
356 pdata += ETH_HLEN;
357 a_len -= ETH_HLEN;
358
359 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
360 if (!sub_skb)
361 break;
362 skb_reserve(sub_skb, 12);
363 skb_put_data(sub_skb, pdata, nSubframe_Length);
364 subframes[nr_subframes++] = sub_skb;
365 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
366 netdev_warn(padapter->pnetdev, "r8712u: ParseSubframe(): Too many Subframes! Packets dropped!\n");
367 break;
368 }
369 pdata += nSubframe_Length;
370 a_len -= nSubframe_Length;
371 if (a_len != 0) {
372 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3);
373 if (padding_len == 4)
374 padding_len = 0;
375 if (a_len < padding_len)
376 goto exit;
377 pdata += padding_len;
378 a_len -= padding_len;
379 }
380 }
381 for (i = 0; i < nr_subframes; i++) {
382 sub_skb = subframes[i];
383
384 eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7];
385 if (sub_skb->len >= 8 &&
386 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
387 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
388 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
389
390
391
392 skb_pull(sub_skb, SNAP_SIZE);
393 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
394 ETH_ALEN);
395 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
396 ETH_ALEN);
397 } else {
398 __be16 len;
399
400 len = htons(sub_skb->len);
401 memcpy(skb_push(sub_skb, 2), &len, 2);
402 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
403 ETH_ALEN);
404 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
405 ETH_ALEN);
406 }
407
408 if (sub_skb) {
409 sub_skb->protocol =
410 eth_type_trans(sub_skb, padapter->pnetdev);
411 sub_skb->dev = padapter->pnetdev;
412 if ((pattrib->tcpchk_valid == 1) &&
413 (pattrib->tcp_chkrpt == 1)) {
414 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
415 } else {
416 sub_skb->ip_summed = CHECKSUM_NONE;
417 }
418 netif_rx(sub_skb);
419 }
420 }
421exit:
422 prframe->u.hdr.len = 0;
423 r8712_free_recvframe(prframe, pfree_recv_queue);
424 return _SUCCESS;
425}
426
427void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
428{
429 __le32 voffset;
430 u8 *poffset;
431 u16 cmd_len, drvinfo_sz;
432 struct recv_stat *prxstat;
433
434 poffset = prxcmdbuf;
435 voffset = *(__le32 *)poffset;
436 prxstat = prxcmdbuf;
437 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
438 drvinfo_sz <<= 3;
439 poffset += RXDESC_SIZE + drvinfo_sz;
440 do {
441 voffset = *(__le32 *)poffset;
442 cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
443 r8712_event_handle(padapter, (__le32 *)poffset);
444 poffset += (cmd_len + 8);
445 } while (le32_to_cpu(voffset) & BIT(31));
446
447}
448
449static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl,
450 u16 seq_num)
451{
452 u8 wsize = preorder_ctrl->wsize_b;
453 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) % 4096;
454
455
456 if (preorder_ctrl->indicate_seq == 0xffff)
457 preorder_ctrl->indicate_seq = seq_num;
458
459 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
460 return false;
461
462
463
464
465
466 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq))
467 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq +
468 1) % 4096;
469 else if (SN_LESS(wend, seq_num)) {
470 if (seq_num >= (wsize - 1))
471 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
472 else
473 preorder_ctrl->indicate_seq = 4095 - (wsize -
474 (seq_num + 1)) + 1;
475 }
476 return true;
477}
478
479static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
480 union recv_frame *prframe)
481{
482 struct list_head *phead, *plist;
483 union recv_frame *pnextrframe;
484 struct rx_pkt_attrib *pnextattrib;
485 struct __queue *ppending_recvframe_queue =
486 &preorder_ctrl->pending_recvframe_queue;
487 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
488
489 phead = &ppending_recvframe_queue->queue;
490 plist = phead->next;
491 while (!end_of_queue_search(phead, plist)) {
492 pnextrframe = container_of(plist, union recv_frame, u.list);
493 pnextattrib = &pnextrframe->u.hdr.attrib;
494 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
495 plist = plist->next;
496 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
497 return false;
498 else
499 break;
500 }
501 list_del_init(&(prframe->u.hdr.list));
502 list_add_tail(&(prframe->u.hdr.list), plist);
503 return true;
504}
505
506int r8712_recv_indicatepkts_in_order(struct _adapter *padapter,
507 struct recv_reorder_ctrl *preorder_ctrl,
508 int bforced)
509{
510 struct list_head *phead, *plist;
511 union recv_frame *prframe;
512 struct rx_pkt_attrib *pattrib;
513 int bPktInBuf = false;
514 struct recv_priv *precvpriv = &padapter->recvpriv;
515 struct __queue *ppending_recvframe_queue =
516 &preorder_ctrl->pending_recvframe_queue;
517
518 phead = &ppending_recvframe_queue->queue;
519 plist = phead->next;
520
521 if (bforced) {
522 if (list_empty(phead))
523 return true;
524
525 prframe = container_of(plist, union recv_frame, u.list);
526 pattrib = &prframe->u.hdr.attrib;
527 preorder_ctrl->indicate_seq = pattrib->seq_num;
528 }
529
530
531
532 while (!list_empty(phead)) {
533 prframe = container_of(plist, union recv_frame, u.list);
534 pattrib = &prframe->u.hdr.attrib;
535 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
536 plist = plist->next;
537 list_del_init(&(prframe->u.hdr.list));
538 if (SN_EQUAL(preorder_ctrl->indicate_seq,
539 pattrib->seq_num))
540 preorder_ctrl->indicate_seq =
541 (preorder_ctrl->indicate_seq + 1) % 4096;
542
543 if (!pattrib->amsdu) {
544 if (!padapter->driver_stopped &&
545 !padapter->surprise_removed) {
546
547 r8712_recv_indicatepkt(padapter,
548 prframe);
549 }
550 } else if (pattrib->amsdu == 1) {
551 if (amsdu_to_msdu(padapter, prframe) !=
552 _SUCCESS)
553 r8712_free_recvframe(prframe,
554 &precvpriv->free_recv_queue);
555 }
556
557 bPktInBuf = false;
558 } else {
559 bPktInBuf = true;
560 break;
561 }
562 }
563 return bPktInBuf;
564}
565
566static int recv_indicatepkt_reorder(struct _adapter *padapter,
567 union recv_frame *prframe)
568{
569 unsigned long irql;
570 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
571 struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
572 struct __queue *ppending_recvframe_queue =
573 &preorder_ctrl->pending_recvframe_queue;
574
575 if (!pattrib->amsdu) {
576
577 r8712_wlanhdr_to_ethhdr(prframe);
578 if (pattrib->qos != 1) {
579 if (!padapter->driver_stopped &&
580 !padapter->surprise_removed) {
581 r8712_recv_indicatepkt(padapter, prframe);
582 return _SUCCESS;
583 } else {
584 return _FAIL;
585 }
586 }
587 }
588 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
589
590 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num))
591 goto _err_exit;
592
593 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
594 goto _err_exit;
595
596
597
598
599
600
601
602
603
604
605
606 if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false) ==
607 true) {
608 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
609 jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
610 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
611 } else {
612 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
613 del_timer(&preorder_ctrl->reordering_ctrl_timer);
614 }
615 return _SUCCESS;
616_err_exit:
617 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
618 return _FAIL;
619}
620
621void r8712_reordering_ctrl_timeout_handler(void *pcontext)
622{
623 unsigned long irql;
624 struct recv_reorder_ctrl *preorder_ctrl = pcontext;
625 struct _adapter *padapter = preorder_ctrl->padapter;
626 struct __queue *ppending_recvframe_queue =
627 &preorder_ctrl->pending_recvframe_queue;
628
629 if (padapter->driver_stopped || padapter->surprise_removed)
630 return;
631 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
632 r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, true);
633 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
634}
635
636static int r8712_process_recv_indicatepkts(struct _adapter *padapter,
637 union recv_frame *prframe)
638{
639 int retval = _SUCCESS;
640 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
641 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
642
643 if (phtpriv->ht_option == 1) {
644 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
645
646 if (!padapter->driver_stopped &&
647 !padapter->surprise_removed)
648 return _FAIL;
649 }
650 } else {
651 retval = r8712_wlanhdr_to_ethhdr(prframe);
652 if (retval != _SUCCESS)
653 return retval;
654 if (!padapter->driver_stopped && !padapter->surprise_removed) {
655
656 r8712_recv_indicatepkt(padapter, prframe);
657 } else {
658 return _FAIL;
659 }
660 }
661 return retval;
662}
663
664static u8 query_rx_pwr_percentage(s8 antpower)
665{
666 if ((antpower <= -100) || (antpower >= 20))
667 return 0;
668 else if (antpower >= 0)
669 return 100;
670 else
671 return 100 + antpower;
672}
673
674static u8 evm_db2percentage(s8 value)
675{
676
677
678
679 s8 ret_val;
680
681 ret_val = value;
682 if (ret_val >= 0)
683 ret_val = 0;
684 if (ret_val <= -33)
685 ret_val = -33;
686 ret_val = -ret_val;
687 ret_val *= 3;
688 if (ret_val == 99)
689 ret_val = 100;
690 return ret_val;
691}
692
693s32 r8712_signal_scale_mapping(s32 cur_sig)
694{
695 s32 ret_sig;
696
697 if (cur_sig >= 51 && cur_sig <= 100)
698 ret_sig = 100;
699 else if (cur_sig >= 41 && cur_sig <= 50)
700 ret_sig = 80 + ((cur_sig - 40) * 2);
701 else if (cur_sig >= 31 && cur_sig <= 40)
702 ret_sig = 66 + (cur_sig - 30);
703 else if (cur_sig >= 21 && cur_sig <= 30)
704 ret_sig = 54 + (cur_sig - 20);
705 else if (cur_sig >= 10 && cur_sig <= 20)
706 ret_sig = 42 + (((cur_sig - 10) * 2) / 3);
707 else if (cur_sig >= 5 && cur_sig <= 9)
708 ret_sig = 22 + (((cur_sig - 5) * 3) / 2);
709 else if (cur_sig >= 1 && cur_sig <= 4)
710 ret_sig = 6 + (((cur_sig - 1) * 3) / 2);
711 else
712 ret_sig = cur_sig;
713 return ret_sig;
714}
715
716static s32 translate2dbm(struct _adapter *padapter, u8 signal_strength_idx)
717{
718 s32 signal_power;
719
720 signal_power = (s32)((signal_strength_idx + 1) >> 1);
721 signal_power -= 95;
722 return signal_power;
723}
724
725static void query_rx_phy_status(struct _adapter *padapter,
726 union recv_frame *prframe)
727{
728 u8 i, max_spatial_stream, evm;
729 struct recv_stat *prxstat = (struct recv_stat *)prframe->u.hdr.rx_head;
730 struct phy_stat *pphy_stat = (struct phy_stat *)(prxstat + 1);
731 u8 *pphy_head = (u8 *)(prxstat + 1);
732 s8 rx_pwr[4], rx_pwr_all;
733 u8 pwdb_all;
734 u32 rssi, total_rssi = 0;
735 u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0;
736 struct phy_cck_rx_status *pcck_buf;
737 u8 sq;
738
739
740 bcck_rate = (prframe->u.hdr.attrib.mcs_rate <= 3 ? 1 : 0);
741 if (bcck_rate) {
742 u8 report;
743
744
745 pcck_buf = (struct phy_cck_rx_status *)pphy_stat;
746
747
748
749
750 if (!cck_highpwr) {
751 report = pcck_buf->cck_agc_rpt & 0xc0;
752 report >>= 6;
753 switch (report) {
754
755
756
757
758
759 case 0x3:
760 rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
761 0x3e);
762 break;
763 case 0x2:
764 rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
765 0x3e);
766 break;
767 case 0x1:
768 rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
769 0x3e);
770 break;
771 case 0x0:
772 rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
773 0x3e);
774 break;
775 }
776 } else {
777 report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
778 0x60;
779 report >>= 5;
780 switch (report) {
781 case 0x3:
782 rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
783 0x1f) << 1);
784 break;
785 case 0x2:
786 rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
787 0x1f) << 1);
788 break;
789 case 0x1:
790 rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
791 0x1f) << 1);
792 break;
793 case 0x0:
794 rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
795 0x1f) << 1);
796 break;
797 }
798 }
799 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
800
801
802 pwdb_all += 6;
803 if (pwdb_all > 100)
804 pwdb_all = 100;
805
806 if (pwdb_all > 34 && pwdb_all <= 42)
807 pwdb_all -= 2;
808 else if (pwdb_all > 26 && pwdb_all <= 34)
809 pwdb_all -= 6;
810 else if (pwdb_all > 14 && pwdb_all <= 26)
811 pwdb_all -= 8;
812 else if (pwdb_all > 4 && pwdb_all <= 14)
813 pwdb_all -= 4;
814
815
816
817 if (pwdb_all > 40) {
818 sq = 100;
819 } else {
820 sq = pcck_buf->sq_rpt;
821 if (pcck_buf->sq_rpt > 64)
822 sq = 0;
823 else if (pcck_buf->sq_rpt < 20)
824 sq = 100;
825 else
826 sq = ((64 - sq) * 100) / 44;
827 }
828 prframe->u.hdr.attrib.signal_qual = sq;
829 prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq;
830 prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1;
831 } else {
832
833 for (i = 0; i < ((padapter->registrypriv.rf_config) &
834 0x0f); i++) {
835 rf_rx_num++;
836 rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i]
837 & 0x3F) * 2) - 110;
838
839 rssi = query_rx_pwr_percentage(rx_pwr[i]);
840 total_rssi += rssi;
841 }
842
843
844
845 rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f)
846 - 106;
847 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
848
849 {
850
851 if (prframe->u.hdr.attrib.htc &&
852 prframe->u.hdr.attrib.mcs_rate >= 20 &&
853 prframe->u.hdr.attrib.mcs_rate <= 27) {
854
855 max_spatial_stream = 2;
856 } else {
857
858 max_spatial_stream = 1;
859 }
860 for (i = 0; i < max_spatial_stream; i++) {
861 evm = evm_db2percentage((pphy_head
862 [PHY_STAT_RXEVM_SHT + i]));
863 prframe->u.hdr.attrib.signal_qual =
864 (u8)(evm & 0xff);
865 prframe->u.hdr.attrib.rx_mimo_signal_qual[i] =
866 (u8)(evm & 0xff);
867 }
868 }
869 }
870
871
872
873
874 if (bcck_rate) {
875 prframe->u.hdr.attrib.signal_strength =
876 (u8)r8712_signal_scale_mapping(pwdb_all);
877 } else {
878 if (rf_rx_num != 0)
879 prframe->u.hdr.attrib.signal_strength =
880 (u8)(r8712_signal_scale_mapping(total_rssi /=
881 rf_rx_num));
882 }
883}
884
885static void process_link_qual(struct _adapter *padapter,
886 union recv_frame *prframe)
887{
888 u32 last_evm = 0, tmpVal;
889 struct rx_pkt_attrib *pattrib;
890 struct smooth_rssi_data *sqd = &padapter->recvpriv.signal_qual_data;
891
892 if (!prframe || !padapter)
893 return;
894 pattrib = &prframe->u.hdr.attrib;
895 if (pattrib->signal_qual != 0) {
896
897
898
899 if (sqd->total_num++ >= PHY_LINKQUALITY_SLID_WIN_MAX) {
900 sqd->total_num = PHY_LINKQUALITY_SLID_WIN_MAX;
901 last_evm = sqd->elements[sqd->index];
902 sqd->total_val -= last_evm;
903 }
904 sqd->total_val += pattrib->signal_qual;
905 sqd->elements[sqd->index++] = pattrib->signal_qual;
906 if (sqd->index >= PHY_LINKQUALITY_SLID_WIN_MAX)
907 sqd->index = 0;
908
909
910 tmpVal = sqd->total_val / sqd->total_num;
911 padapter->recvpriv.signal = (u8)tmpVal;
912 }
913}
914
915static void process_rssi(struct _adapter *padapter, union recv_frame *prframe)
916{
917 u32 last_rssi, tmp_val;
918 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
919 struct smooth_rssi_data *ssd = &padapter->recvpriv.signal_strength_data;
920
921 if (ssd->total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
922 ssd->total_num = PHY_RSSI_SLID_WIN_MAX;
923 last_rssi = ssd->elements[ssd->index];
924 ssd->total_val -= last_rssi;
925 }
926 ssd->total_val += pattrib->signal_strength;
927 ssd->elements[ssd->index++] = pattrib->signal_strength;
928 if (ssd->index >= PHY_RSSI_SLID_WIN_MAX)
929 ssd->index = 0;
930 tmp_val = ssd->total_val / ssd->total_num;
931 padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val);
932}
933
934static void process_phy_info(struct _adapter *padapter,
935 union recv_frame *prframe)
936{
937 query_rx_phy_status(padapter, prframe);
938 process_rssi(padapter, prframe);
939 process_link_qual(padapter, prframe);
940}
941
942int recv_func(struct _adapter *padapter, void *pcontext)
943{
944 struct rx_pkt_attrib *pattrib;
945 union recv_frame *prframe, *orig_prframe;
946 int retval = _SUCCESS;
947 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
948 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
949
950 prframe = pcontext;
951 orig_prframe = prframe;
952 pattrib = &prframe->u.hdr.attrib;
953 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
954 if (pattrib->crc_err == 1)
955 padapter->mppriv.rx_crcerrpktcount++;
956 else
957 padapter->mppriv.rx_pktcount++;
958 if (!check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE)) {
959
960 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
961 goto _exit_recv_func;
962 }
963 }
964
965 retval = r8712_validate_recv_frame(padapter, prframe);
966 if (retval != _SUCCESS) {
967
968 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
969 goto _exit_recv_func;
970 }
971 process_phy_info(padapter, prframe);
972 prframe = r8712_decryptor(padapter, prframe);
973 if (!prframe) {
974 retval = _FAIL;
975 goto _exit_recv_func;
976 }
977 prframe = r8712_recvframe_chk_defrag(padapter, prframe);
978 if (!prframe)
979 goto _exit_recv_func;
980 prframe = r8712_portctrl(padapter, prframe);
981 if (!prframe) {
982 retval = _FAIL;
983 goto _exit_recv_func;
984 }
985 retval = r8712_process_recv_indicatepkts(padapter, prframe);
986 if (retval != _SUCCESS) {
987 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
988 goto _exit_recv_func;
989 }
990_exit_recv_func:
991 return retval;
992}
993
994static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
995{
996 u8 *pbuf, shift_sz = 0;
997 u8 frag, mf;
998 uint pkt_len;
999 u32 transfer_len;
1000 struct recv_stat *prxstat;
1001 u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz;
1002 struct __queue *pfree_recv_queue;
1003 _pkt *pkt_copy = NULL;
1004 union recv_frame *precvframe = NULL;
1005 struct recv_priv *precvpriv = &padapter->recvpriv;
1006
1007 pfree_recv_queue = &(precvpriv->free_recv_queue);
1008 pbuf = pskb->data;
1009 prxstat = (struct recv_stat *)pbuf;
1010 pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff;
1011 pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff;
1012 transfer_len = pskb->len;
1013
1014
1015
1016
1017 if (transfer_len < pkt_len) {
1018
1019
1020
1021 return _FAIL;
1022 }
1023 do {
1024 prxstat = (struct recv_stat *)pbuf;
1025 pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff;
1026
1027 mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1;
1028
1029 frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf;
1030
1031 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
1032 drvinfo_sz <<= 3;
1033 if (pkt_len <= 0)
1034 goto _exit_recvbuf2recvframe;
1035
1036 if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
1037 shift_sz = 2;
1038 precvframe = r8712_alloc_recvframe(pfree_recv_queue);
1039 if (!precvframe)
1040 goto _exit_recvbuf2recvframe;
1041 INIT_LIST_HEAD(&precvframe->u.hdr.list);
1042 precvframe->u.hdr.precvbuf = NULL;
1043 precvframe->u.hdr.len = 0;
1044 tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE;
1045 pkt_offset = (u16)round_up(tmp_len, 128);
1046
1047
1048
1049 if ((mf == 1) && (frag == 0))
1050
1051 alloc_sz = max_t(u16, tmp_len, 1658);
1052 else
1053 alloc_sz = tmp_len;
1054
1055
1056
1057 alloc_sz += 6;
1058 pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
1059 if (pkt_copy) {
1060 precvframe->u.hdr.pkt = pkt_copy;
1061 skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data)
1062 % 4));
1063 skb_reserve(pkt_copy, shift_sz);
1064 memcpy(pkt_copy->data, pbuf, tmp_len);
1065 precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data =
1066 precvframe->u.hdr.rx_tail = pkt_copy->data;
1067 precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
1068 } else {
1069 precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC);
1070 if (!precvframe->u.hdr.pkt)
1071 return _FAIL;
1072 precvframe->u.hdr.rx_head = pbuf;
1073 precvframe->u.hdr.rx_data = pbuf;
1074 precvframe->u.hdr.rx_tail = pbuf;
1075 precvframe->u.hdr.rx_end = pbuf + alloc_sz;
1076 }
1077 recvframe_put(precvframe, tmp_len);
1078 recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
1079
1080
1081
1082 update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib,
1083 prxstat);
1084 r8712_recv_entry(precvframe);
1085 transfer_len -= pkt_offset;
1086 pbuf += pkt_offset;
1087 pkt_cnt--;
1088 precvframe = NULL;
1089 pkt_copy = NULL;
1090 } while ((transfer_len > 0) && pkt_cnt > 0);
1091_exit_recvbuf2recvframe:
1092 return _SUCCESS;
1093}
1094
1095static void recv_tasklet(void *priv)
1096{
1097 struct sk_buff *pskb;
1098 struct _adapter *padapter = priv;
1099 struct recv_priv *precvpriv = &padapter->recvpriv;
1100
1101 while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
1102 recvbuf2recvframe(padapter, pskb);
1103 skb_reset_tail_pointer(pskb);
1104 pskb->len = 0;
1105 if (!skb_cloned(pskb))
1106 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
1107 else
1108 consume_skb(pskb);
1109 }
1110}
1111