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17#define _RTL8712_RECV_C_
18
19#include <linux/if_ether.h>
20#include <linux/ip.h>
21#include <net/cfg80211.h>
22
23#include "osdep_service.h"
24#include "drv_types.h"
25#include "recv_osdep.h"
26#include "mlme_osdep.h"
27#include "ethernet.h"
28#include "usb_ops.h"
29#include "wifi.h"
30
31static void recv_tasklet(unsigned long priv);
32
33void r8712_init_recv_priv(struct recv_priv *precvpriv,
34 struct _adapter *padapter)
35{
36 int i;
37 struct recv_buf *precvbuf;
38 addr_t tmpaddr = 0;
39 int alignment = 0;
40 struct sk_buff *pskb = NULL;
41
42
43 _init_queue(&precvpriv->free_recv_buf_queue);
44 precvpriv->pallocated_recv_buf =
45 kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4, GFP_ATOMIC);
46 if (!precvpriv->pallocated_recv_buf)
47 return;
48 precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 -
49 ((addr_t)(precvpriv->pallocated_recv_buf) & 3);
50 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
51 for (i = 0; i < NR_RECVBUFF; i++) {
52 INIT_LIST_HEAD(&precvbuf->list);
53 spin_lock_init(&precvbuf->recvbuf_lock);
54 if (r8712_os_recvbuf_resource_alloc(padapter, precvbuf))
55 break;
56 precvbuf->ref_cnt = 0;
57 precvbuf->adapter = padapter;
58 list_add_tail(&precvbuf->list,
59 &(precvpriv->free_recv_buf_queue.queue));
60 precvbuf++;
61 }
62 precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
63 tasklet_init(&precvpriv->recv_tasklet, recv_tasklet,
64 (unsigned long)padapter);
65 skb_queue_head_init(&precvpriv->rx_skb_queue);
66
67 skb_queue_head_init(&precvpriv->free_recv_skb_queue);
68 for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
69 pskb = netdev_alloc_skb(padapter->pnetdev, MAX_RECVBUF_SZ +
70 RECVBUFF_ALIGN_SZ);
71 if (pskb) {
72 tmpaddr = (addr_t)pskb->data;
73 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
74 skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignment));
75 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
76 }
77 pskb = NULL;
78 }
79}
80
81void r8712_free_recv_priv(struct recv_priv *precvpriv)
82{
83 int i;
84 struct recv_buf *precvbuf;
85 struct _adapter *padapter = precvpriv->adapter;
86
87 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
88 for (i = 0; i < NR_RECVBUFF; i++) {
89 r8712_os_recvbuf_resource_free(padapter, precvbuf);
90 precvbuf++;
91 }
92 kfree(precvpriv->pallocated_recv_buf);
93 skb_queue_purge(&precvpriv->rx_skb_queue);
94 if (skb_queue_len(&precvpriv->rx_skb_queue))
95 netdev_warn(padapter->pnetdev, "r8712u: rx_skb_queue not empty\n");
96 skb_queue_purge(&precvpriv->free_recv_skb_queue);
97 if (skb_queue_len(&precvpriv->free_recv_skb_queue))
98 netdev_warn(padapter->pnetdev, "r8712u: free_recv_skb_queue not empty %d\n",
99 skb_queue_len(&precvpriv->free_recv_skb_queue));
100}
101
102void r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
103{
104 precvbuf->transfer_len = 0;
105 precvbuf->len = 0;
106 precvbuf->ref_cnt = 0;
107 if (precvbuf->pbuf) {
108 precvbuf->pdata = precvbuf->pbuf;
109 precvbuf->phead = precvbuf->pbuf;
110 precvbuf->ptail = precvbuf->pbuf;
111 precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ;
112 }
113}
114
115void r8712_free_recvframe(union recv_frame *precvframe,
116 struct __queue *pfree_recv_queue)
117{
118 unsigned long irqL;
119 struct _adapter *padapter = precvframe->u.hdr.adapter;
120 struct recv_priv *precvpriv = &padapter->recvpriv;
121
122 if (precvframe->u.hdr.pkt) {
123 dev_kfree_skb_any(precvframe->u.hdr.pkt);
124 precvframe->u.hdr.pkt = NULL;
125 }
126 spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
127 list_del_init(&(precvframe->u.hdr.list));
128 list_add_tail(&(precvframe->u.hdr.list), &pfree_recv_queue->queue);
129 if (padapter) {
130 if (pfree_recv_queue == &precvpriv->free_recv_queue)
131 precvpriv->free_recvframe_cnt++;
132 }
133 spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
134}
135
136static void update_recvframe_attrib_from_recvstat(struct rx_pkt_attrib *pattrib,
137 struct recv_stat *prxstat)
138{
139 u16 drvinfo_sz;
140
141 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
142 drvinfo_sz <<= 3;
143
144
145
146 pattrib->bdecrypted = (le32_to_cpu(prxstat->rxdw0) & BIT(27)) == 0;
147 pattrib->crc_err = (le32_to_cpu(prxstat->rxdw0) & BIT(14)) != 0;
148
149
150
151 if (le32_to_cpu(prxstat->rxdw3) & BIT(13)) {
152 pattrib->tcpchk_valid = 1;
153 if (le32_to_cpu(prxstat->rxdw3) & BIT(11))
154 pattrib->tcp_chkrpt = 1;
155 else
156 pattrib->tcp_chkrpt = 0;
157 if (le32_to_cpu(prxstat->rxdw3) & BIT(12))
158 pattrib->ip_chkrpt = 1;
159 else
160 pattrib->ip_chkrpt = 0;
161 } else {
162 pattrib->tcpchk_valid = 0;
163 }
164 pattrib->mcs_rate = (u8)((le32_to_cpu(prxstat->rxdw3)) & 0x3f);
165 pattrib->htc = (u8)((le32_to_cpu(prxstat->rxdw3) >> 14) & 0x1);
166
167
168
169}
170
171
172static union recv_frame *recvframe_defrag(struct _adapter *adapter,
173 struct __queue *defrag_q)
174{
175 struct list_head *plist, *phead;
176 u8 wlanhdr_offset;
177 u8 curfragnum;
178 struct recv_frame_hdr *pfhdr, *pnfhdr;
179 union recv_frame *prframe, *pnextrframe;
180 struct __queue *pfree_recv_queue;
181
182 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
183 phead = &defrag_q->queue;
184 plist = phead->next;
185 prframe = container_of(plist, union recv_frame, u.list);
186 list_del_init(&prframe->u.list);
187 pfhdr = &prframe->u.hdr;
188 curfragnum = 0;
189 if (curfragnum != pfhdr->attrib.frag_num) {
190
191
192
193 r8712_free_recvframe(prframe, pfree_recv_queue);
194 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
195 return NULL;
196 }
197 curfragnum++;
198 plist = &defrag_q->queue;
199 plist = plist->next;
200 while (!end_of_queue_search(phead, plist)) {
201 pnextrframe = container_of(plist, union recv_frame, u.list);
202 pnfhdr = &pnextrframe->u.hdr;
203
204 if (curfragnum != pnfhdr->attrib.frag_num) {
205
206
207
208 r8712_free_recvframe(prframe, pfree_recv_queue);
209 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
210 return NULL;
211 }
212 curfragnum++;
213
214
215
216 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
217 recvframe_pull(pnextrframe, wlanhdr_offset);
218
219
220
221 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
222 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
223 recvframe_put(prframe, pnfhdr->len);
224 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
225 plist = plist->next;
226 }
227
228 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
229 return prframe;
230}
231
232
233union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter,
234 union recv_frame *precv_frame)
235{
236 u8 ismfrag;
237 u8 fragnum;
238 u8 *psta_addr;
239 struct recv_frame_hdr *pfhdr;
240 struct sta_info *psta;
241 struct sta_priv *pstapriv;
242 struct list_head *phead;
243 union recv_frame *prtnframe = NULL;
244 struct __queue *pfree_recv_queue, *pdefrag_q;
245
246 pstapriv = &padapter->stapriv;
247 pfhdr = &precv_frame->u.hdr;
248 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
249
250 ismfrag = pfhdr->attrib.mfrag;
251 fragnum = pfhdr->attrib.frag_num;
252 psta_addr = pfhdr->attrib.ta;
253 psta = r8712_get_stainfo(pstapriv, psta_addr);
254 if (!psta)
255 pdefrag_q = NULL;
256 else
257 pdefrag_q = &psta->sta_recvpriv.defrag_q;
258
259 if ((ismfrag == 0) && (fragnum == 0))
260 prtnframe = precv_frame;
261 if (ismfrag == 1) {
262
263
264
265 if (pdefrag_q) {
266 if (fragnum == 0) {
267
268 if (!list_empty(&pdefrag_q->queue)) {
269
270 r8712_free_recvframe_queue(pdefrag_q,
271 pfree_recv_queue);
272 }
273 }
274
275 phead = &pdefrag_q->queue;
276 list_add_tail(&pfhdr->list, phead);
277 prtnframe = NULL;
278 } else {
279
280
281
282 r8712_free_recvframe(precv_frame, pfree_recv_queue);
283 prtnframe = NULL;
284 }
285 }
286 if ((ismfrag == 0) && (fragnum != 0)) {
287
288
289
290 if (pdefrag_q) {
291 phead = &pdefrag_q->queue;
292 list_add_tail(&pfhdr->list, phead);
293
294 precv_frame = recvframe_defrag(padapter, pdefrag_q);
295 prtnframe = precv_frame;
296 } else {
297
298
299
300 r8712_free_recvframe(precv_frame, pfree_recv_queue);
301 prtnframe = NULL;
302 }
303 }
304 if (prtnframe && (prtnframe->u.hdr.attrib.privacy)) {
305
306 if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) {
307 r8712_free_recvframe(prtnframe, pfree_recv_queue);
308 prtnframe = NULL;
309 }
310 }
311 return prtnframe;
312}
313
314static void amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
315{
316 int a_len, padding_len;
317 u16 eth_type, nSubframe_Length;
318 u8 nr_subframes, i;
319 unsigned char *pdata;
320 struct rx_pkt_attrib *pattrib;
321 _pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
322 struct recv_priv *precvpriv = &padapter->recvpriv;
323 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
324
325 nr_subframes = 0;
326 pattrib = &prframe->u.hdr.attrib;
327 recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);
328 if (prframe->u.hdr.attrib.iv_len > 0)
329 recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);
330 a_len = prframe->u.hdr.len;
331 pdata = prframe->u.hdr.rx_data;
332 while (a_len > ETH_HLEN) {
333
334 nSubframe_Length = *((u16 *)(pdata + 12));
335
336 nSubframe_Length = (nSubframe_Length >> 8) +
337 (nSubframe_Length << 8);
338 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
339 netdev_warn(padapter->pnetdev, "r8712u: nRemain_Length is %d and nSubframe_Length is: %d\n",
340 a_len, nSubframe_Length);
341 goto exit;
342 }
343
344 pdata += ETH_HLEN;
345 a_len -= ETH_HLEN;
346
347 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
348 if (!sub_skb)
349 break;
350 skb_reserve(sub_skb, 12);
351 skb_put_data(sub_skb, pdata, nSubframe_Length);
352 subframes[nr_subframes++] = sub_skb;
353 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
354 netdev_warn(padapter->pnetdev, "r8712u: ParseSubframe(): Too many Subframes! Packets dropped!\n");
355 break;
356 }
357 pdata += nSubframe_Length;
358 a_len -= nSubframe_Length;
359 if (a_len != 0) {
360 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3);
361 if (padding_len == 4)
362 padding_len = 0;
363 if (a_len < padding_len)
364 goto exit;
365 pdata += padding_len;
366 a_len -= padding_len;
367 }
368 }
369 for (i = 0; i < nr_subframes; i++) {
370 sub_skb = subframes[i];
371
372 eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7];
373 if (sub_skb->len >= 8 &&
374 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
375 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
376 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
377
378
379
380 skb_pull(sub_skb, SNAP_SIZE);
381 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
382 ETH_ALEN);
383 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
384 ETH_ALEN);
385 } else {
386 __be16 len;
387
388 len = htons(sub_skb->len);
389 memcpy(skb_push(sub_skb, 2), &len, 2);
390 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
391 ETH_ALEN);
392 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
393 ETH_ALEN);
394 }
395
396 if (sub_skb) {
397 sub_skb->protocol =
398 eth_type_trans(sub_skb, padapter->pnetdev);
399 sub_skb->dev = padapter->pnetdev;
400 if ((pattrib->tcpchk_valid == 1) &&
401 (pattrib->tcp_chkrpt == 1)) {
402 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
403 } else {
404 sub_skb->ip_summed = CHECKSUM_NONE;
405 }
406 netif_rx(sub_skb);
407 }
408 }
409exit:
410 prframe->u.hdr.len = 0;
411 r8712_free_recvframe(prframe, pfree_recv_queue);
412}
413
414void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
415{
416 __le32 voffset;
417 u8 *poffset;
418 u16 cmd_len, drvinfo_sz;
419 struct recv_stat *prxstat;
420
421 poffset = prxcmdbuf;
422 voffset = *(__le32 *)poffset;
423 prxstat = prxcmdbuf;
424 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
425 drvinfo_sz <<= 3;
426 poffset += RXDESC_SIZE + drvinfo_sz;
427 do {
428 voffset = *(__le32 *)poffset;
429 cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
430 r8712_event_handle(padapter, (__le32 *)poffset);
431 poffset += (cmd_len + 8);
432 } while (le32_to_cpu(voffset) & BIT(31));
433}
434
435static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl,
436 u16 seq_num)
437{
438 u8 wsize = preorder_ctrl->wsize_b;
439 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) % 4096;
440
441
442 if (preorder_ctrl->indicate_seq == 0xffff)
443 preorder_ctrl->indicate_seq = seq_num;
444
445 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
446 return false;
447
448
449
450
451
452 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq))
453 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq +
454 1) % 4096;
455 else if (SN_LESS(wend, seq_num)) {
456 if (seq_num >= (wsize - 1))
457 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
458 else
459 preorder_ctrl->indicate_seq = 4095 - (wsize -
460 (seq_num + 1)) + 1;
461 }
462 return true;
463}
464
465static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
466 union recv_frame *prframe)
467{
468 struct list_head *phead, *plist;
469 union recv_frame *pnextrframe;
470 struct rx_pkt_attrib *pnextattrib;
471 struct __queue *ppending_recvframe_queue =
472 &preorder_ctrl->pending_recvframe_queue;
473 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
474
475 phead = &ppending_recvframe_queue->queue;
476 plist = phead->next;
477 while (!end_of_queue_search(phead, plist)) {
478 pnextrframe = container_of(plist, union recv_frame, u.list);
479 pnextattrib = &pnextrframe->u.hdr.attrib;
480 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
481 plist = plist->next;
482 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
483 return false;
484 break;
485 }
486 list_del_init(&(prframe->u.hdr.list));
487 list_add_tail(&(prframe->u.hdr.list), plist);
488 return true;
489}
490
491int r8712_recv_indicatepkts_in_order(struct _adapter *padapter,
492 struct recv_reorder_ctrl *preorder_ctrl,
493 int bforced)
494{
495 struct list_head *phead, *plist;
496 union recv_frame *prframe;
497 struct rx_pkt_attrib *pattrib;
498 int bPktInBuf = false;
499 struct __queue *ppending_recvframe_queue =
500 &preorder_ctrl->pending_recvframe_queue;
501
502 phead = &ppending_recvframe_queue->queue;
503 plist = phead->next;
504
505 if (bforced) {
506 if (list_empty(phead))
507 return true;
508
509 prframe = container_of(plist, union recv_frame, u.list);
510 pattrib = &prframe->u.hdr.attrib;
511 preorder_ctrl->indicate_seq = pattrib->seq_num;
512 }
513
514
515
516 while (!list_empty(phead)) {
517 prframe = container_of(plist, union recv_frame, u.list);
518 pattrib = &prframe->u.hdr.attrib;
519 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
520 plist = plist->next;
521 list_del_init(&(prframe->u.hdr.list));
522 if (SN_EQUAL(preorder_ctrl->indicate_seq,
523 pattrib->seq_num))
524 preorder_ctrl->indicate_seq =
525 (preorder_ctrl->indicate_seq + 1) % 4096;
526
527 if (!pattrib->amsdu) {
528 if (!padapter->driver_stopped &&
529 !padapter->surprise_removed) {
530
531 r8712_recv_indicatepkt(padapter,
532 prframe);
533 }
534 } else if (pattrib->amsdu == 1) {
535 amsdu_to_msdu(padapter, prframe);
536 }
537
538 bPktInBuf = false;
539 } else {
540 bPktInBuf = true;
541 break;
542 }
543 }
544 return bPktInBuf;
545}
546
547static int recv_indicatepkt_reorder(struct _adapter *padapter,
548 union recv_frame *prframe)
549{
550 unsigned long irql;
551 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
552 struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
553 struct __queue *ppending_recvframe_queue =
554 &preorder_ctrl->pending_recvframe_queue;
555
556 if (!pattrib->amsdu) {
557
558 r8712_wlanhdr_to_ethhdr(prframe);
559 if (pattrib->qos != 1) {
560 if (!padapter->driver_stopped &&
561 !padapter->surprise_removed) {
562 r8712_recv_indicatepkt(padapter, prframe);
563 return 0;
564 } else {
565 return -EINVAL;
566 }
567 }
568 }
569 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
570
571 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num))
572 goto _err_exit;
573
574 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
575 goto _err_exit;
576
577
578
579
580
581
582
583
584
585
586
587 if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
588 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
589 jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
590 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
591 } else {
592 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
593 del_timer(&preorder_ctrl->reordering_ctrl_timer);
594 }
595 return 0;
596_err_exit:
597 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
598 return -ENOMEM;
599}
600
601void r8712_reordering_ctrl_timeout_handler(void *pcontext)
602{
603 unsigned long irql;
604 struct recv_reorder_ctrl *preorder_ctrl = pcontext;
605 struct _adapter *padapter = preorder_ctrl->padapter;
606 struct __queue *ppending_recvframe_queue =
607 &preorder_ctrl->pending_recvframe_queue;
608
609 if (padapter->driver_stopped || padapter->surprise_removed)
610 return;
611 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
612 r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, true);
613 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
614}
615
616static int r8712_process_recv_indicatepkts(struct _adapter *padapter,
617 union recv_frame *prframe)
618{
619 int retval = _SUCCESS;
620 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
621 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
622
623 if (phtpriv->ht_option == 1) {
624 if (recv_indicatepkt_reorder(padapter, prframe)) {
625
626 if (!padapter->driver_stopped &&
627 !padapter->surprise_removed)
628 return _FAIL;
629 }
630 } else {
631 retval = r8712_wlanhdr_to_ethhdr(prframe);
632 if (retval)
633 return _FAIL;
634 if (!padapter->driver_stopped && !padapter->surprise_removed) {
635
636 r8712_recv_indicatepkt(padapter, prframe);
637 } else {
638 return _FAIL;
639 }
640 }
641 return retval;
642}
643
644static u8 query_rx_pwr_percentage(s8 antpower)
645{
646 if ((antpower <= -100) || (antpower >= 20))
647 return 0;
648 else if (antpower >= 0)
649 return 100;
650 else
651 return 100 + antpower;
652}
653
654static u8 evm_db2percentage(s8 value)
655{
656
657
658
659 s8 ret_val = clamp(-value, 0, 33) * 3;
660
661 if (ret_val == 99)
662 ret_val = 100;
663
664 return ret_val;
665}
666
667s32 r8712_signal_scale_mapping(s32 cur_sig)
668{
669 s32 ret_sig;
670
671 if (cur_sig >= 51 && cur_sig <= 100)
672 ret_sig = 100;
673 else if (cur_sig >= 41 && cur_sig <= 50)
674 ret_sig = 80 + ((cur_sig - 40) * 2);
675 else if (cur_sig >= 31 && cur_sig <= 40)
676 ret_sig = 66 + (cur_sig - 30);
677 else if (cur_sig >= 21 && cur_sig <= 30)
678 ret_sig = 54 + (cur_sig - 20);
679 else if (cur_sig >= 10 && cur_sig <= 20)
680 ret_sig = 42 + (((cur_sig - 10) * 2) / 3);
681 else if (cur_sig >= 5 && cur_sig <= 9)
682 ret_sig = 22 + (((cur_sig - 5) * 3) / 2);
683 else if (cur_sig >= 1 && cur_sig <= 4)
684 ret_sig = 6 + (((cur_sig - 1) * 3) / 2);
685 else
686 ret_sig = cur_sig;
687 return ret_sig;
688}
689
690static s32 translate2dbm(struct _adapter *padapter, u8 signal_strength_idx)
691{
692 s32 signal_power;
693
694 signal_power = (s32)((signal_strength_idx + 1) >> 1);
695 signal_power -= 95;
696 return signal_power;
697}
698
699static void query_rx_phy_status(struct _adapter *padapter,
700 union recv_frame *prframe)
701{
702 u8 i, max_spatial_stream, evm;
703 struct recv_stat *prxstat = (struct recv_stat *)prframe->u.hdr.rx_head;
704 struct phy_stat *pphy_stat = (struct phy_stat *)(prxstat + 1);
705 u8 *pphy_head = (u8 *)(prxstat + 1);
706 s8 rx_pwr[4], rx_pwr_all;
707 u8 pwdb_all;
708 u32 rssi, total_rssi = 0;
709 u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0;
710 struct phy_cck_rx_status *pcck_buf;
711 u8 sq;
712
713
714 bcck_rate = (prframe->u.hdr.attrib.mcs_rate <= 3 ? 1 : 0);
715 if (bcck_rate) {
716 u8 report;
717
718
719 pcck_buf = (struct phy_cck_rx_status *)pphy_stat;
720
721
722
723
724 if (!cck_highpwr) {
725 report = pcck_buf->cck_agc_rpt & 0xc0;
726 report >>= 6;
727 switch (report) {
728
729
730
731
732
733 case 0x3:
734 rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
735 0x3e);
736 break;
737 case 0x2:
738 rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
739 0x3e);
740 break;
741 case 0x1:
742 rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
743 0x3e);
744 break;
745 case 0x0:
746 rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
747 0x3e);
748 break;
749 }
750 } else {
751 report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
752 0x60;
753 report >>= 5;
754 switch (report) {
755 case 0x3:
756 rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
757 0x1f) << 1);
758 break;
759 case 0x2:
760 rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
761 0x1f) << 1);
762 break;
763 case 0x1:
764 rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
765 0x1f) << 1);
766 break;
767 case 0x0:
768 rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
769 0x1f) << 1);
770 break;
771 }
772 }
773 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
774
775
776 pwdb_all += 6;
777 if (pwdb_all > 100)
778 pwdb_all = 100;
779
780 if (pwdb_all > 34 && pwdb_all <= 42)
781 pwdb_all -= 2;
782 else if (pwdb_all > 26 && pwdb_all <= 34)
783 pwdb_all -= 6;
784 else if (pwdb_all > 14 && pwdb_all <= 26)
785 pwdb_all -= 8;
786 else if (pwdb_all > 4 && pwdb_all <= 14)
787 pwdb_all -= 4;
788
789
790
791 if (pwdb_all > 40) {
792 sq = 100;
793 } else {
794 sq = pcck_buf->sq_rpt;
795 if (pcck_buf->sq_rpt > 64)
796 sq = 0;
797 else if (pcck_buf->sq_rpt < 20)
798 sq = 100;
799 else
800 sq = ((64 - sq) * 100) / 44;
801 }
802 prframe->u.hdr.attrib.signal_qual = sq;
803 prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq;
804 prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1;
805 } else {
806
807 for (i = 0; i < ((padapter->registrypriv.rf_config) &
808 0x0f); i++) {
809 rf_rx_num++;
810 rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i]
811 & 0x3F) * 2) - 110;
812
813 rssi = query_rx_pwr_percentage(rx_pwr[i]);
814 total_rssi += rssi;
815 }
816
817
818
819 rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f)
820 - 106;
821 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
822
823 {
824
825 if (prframe->u.hdr.attrib.htc &&
826 prframe->u.hdr.attrib.mcs_rate >= 20 &&
827 prframe->u.hdr.attrib.mcs_rate <= 27) {
828
829 max_spatial_stream = 2;
830 } else {
831
832 max_spatial_stream = 1;
833 }
834 for (i = 0; i < max_spatial_stream; i++) {
835 evm = evm_db2percentage((pphy_head
836 [PHY_STAT_RXEVM_SHT + i]));
837 prframe->u.hdr.attrib.signal_qual =
838 (u8)(evm & 0xff);
839 prframe->u.hdr.attrib.rx_mimo_signal_qual[i] =
840 (u8)(evm & 0xff);
841 }
842 }
843 }
844
845
846
847
848 if (bcck_rate) {
849 prframe->u.hdr.attrib.signal_strength =
850 (u8)r8712_signal_scale_mapping(pwdb_all);
851 } else {
852 if (rf_rx_num != 0)
853 prframe->u.hdr.attrib.signal_strength =
854 (u8)(r8712_signal_scale_mapping(total_rssi /=
855 rf_rx_num));
856 }
857}
858
859static void process_link_qual(struct _adapter *padapter,
860 union recv_frame *prframe)
861{
862 u32 last_evm = 0, tmpVal;
863 struct rx_pkt_attrib *pattrib;
864 struct smooth_rssi_data *sqd = &padapter->recvpriv.signal_qual_data;
865
866 if (!prframe || !padapter)
867 return;
868 pattrib = &prframe->u.hdr.attrib;
869 if (pattrib->signal_qual != 0) {
870
871
872
873 if (sqd->total_num++ >= PHY_LINKQUALITY_SLID_WIN_MAX) {
874 sqd->total_num = PHY_LINKQUALITY_SLID_WIN_MAX;
875 last_evm = sqd->elements[sqd->index];
876 sqd->total_val -= last_evm;
877 }
878 sqd->total_val += pattrib->signal_qual;
879 sqd->elements[sqd->index++] = pattrib->signal_qual;
880 if (sqd->index >= PHY_LINKQUALITY_SLID_WIN_MAX)
881 sqd->index = 0;
882
883
884 tmpVal = sqd->total_val / sqd->total_num;
885 padapter->recvpriv.signal = (u8)tmpVal;
886 }
887}
888
889static void process_rssi(struct _adapter *padapter, union recv_frame *prframe)
890{
891 u32 last_rssi, tmp_val;
892 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
893 struct smooth_rssi_data *ssd = &padapter->recvpriv.signal_strength_data;
894
895 if (ssd->total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
896 ssd->total_num = PHY_RSSI_SLID_WIN_MAX;
897 last_rssi = ssd->elements[ssd->index];
898 ssd->total_val -= last_rssi;
899 }
900 ssd->total_val += pattrib->signal_strength;
901 ssd->elements[ssd->index++] = pattrib->signal_strength;
902 if (ssd->index >= PHY_RSSI_SLID_WIN_MAX)
903 ssd->index = 0;
904 tmp_val = ssd->total_val / ssd->total_num;
905 padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val);
906}
907
908static void process_phy_info(struct _adapter *padapter,
909 union recv_frame *prframe)
910{
911 query_rx_phy_status(padapter, prframe);
912 process_rssi(padapter, prframe);
913 process_link_qual(padapter, prframe);
914}
915
916int recv_func(struct _adapter *padapter, void *pcontext)
917{
918 struct rx_pkt_attrib *pattrib;
919 union recv_frame *prframe, *orig_prframe;
920 int retval = _SUCCESS;
921 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
922 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
923
924 prframe = pcontext;
925 orig_prframe = prframe;
926 pattrib = &prframe->u.hdr.attrib;
927 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
928 if (pattrib->crc_err == 1)
929 padapter->mppriv.rx_crcerrpktcount++;
930 else
931 padapter->mppriv.rx_pktcount++;
932 if (!check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE)) {
933
934 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
935 goto _exit_recv_func;
936 }
937 }
938
939 retval = r8712_validate_recv_frame(padapter, prframe);
940 if (retval != _SUCCESS) {
941
942 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
943 goto _exit_recv_func;
944 }
945 process_phy_info(padapter, prframe);
946 prframe = r8712_decryptor(padapter, prframe);
947 if (!prframe) {
948 retval = _FAIL;
949 goto _exit_recv_func;
950 }
951 prframe = r8712_recvframe_chk_defrag(padapter, prframe);
952 if (!prframe)
953 goto _exit_recv_func;
954 prframe = r8712_portctrl(padapter, prframe);
955 if (!prframe) {
956 retval = _FAIL;
957 goto _exit_recv_func;
958 }
959 retval = r8712_process_recv_indicatepkts(padapter, prframe);
960 if (retval != _SUCCESS) {
961 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
962 goto _exit_recv_func;
963 }
964_exit_recv_func:
965 return retval;
966}
967
968static void recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
969{
970 u8 *pbuf, shift_sz = 0;
971 u8 frag, mf;
972 uint pkt_len;
973 u32 transfer_len;
974 struct recv_stat *prxstat;
975 u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz;
976 struct __queue *pfree_recv_queue;
977 _pkt *pkt_copy = NULL;
978 union recv_frame *precvframe = NULL;
979 struct recv_priv *precvpriv = &padapter->recvpriv;
980
981 pfree_recv_queue = &(precvpriv->free_recv_queue);
982 pbuf = pskb->data;
983 prxstat = (struct recv_stat *)pbuf;
984 pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff;
985 pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff;
986 transfer_len = pskb->len;
987
988
989
990
991 if (transfer_len < pkt_len) {
992
993
994
995 return;
996 }
997 do {
998 prxstat = (struct recv_stat *)pbuf;
999 pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff;
1000
1001 mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1;
1002
1003 frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf;
1004
1005 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
1006 drvinfo_sz <<= 3;
1007 if (pkt_len <= 0)
1008 return;
1009
1010 if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
1011 shift_sz = 2;
1012 precvframe = r8712_alloc_recvframe(pfree_recv_queue);
1013 if (!precvframe)
1014 return;
1015 INIT_LIST_HEAD(&precvframe->u.hdr.list);
1016 precvframe->u.hdr.precvbuf = NULL;
1017 precvframe->u.hdr.len = 0;
1018 tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE;
1019 pkt_offset = (u16)round_up(tmp_len, 128);
1020
1021
1022
1023 if ((mf == 1) && (frag == 0))
1024
1025 alloc_sz = max_t(u16, tmp_len, 1658);
1026 else
1027 alloc_sz = tmp_len;
1028
1029
1030
1031 alloc_sz += 6;
1032 pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
1033 if (!pkt_copy)
1034 return;
1035
1036 precvframe->u.hdr.pkt = pkt_copy;
1037 skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data) % 4));
1038 skb_reserve(pkt_copy, shift_sz);
1039 memcpy(pkt_copy->data, pbuf, tmp_len);
1040 precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data =
1041 precvframe->u.hdr.rx_tail = pkt_copy->data;
1042 precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
1043
1044 recvframe_put(precvframe, tmp_len);
1045 recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
1046
1047
1048
1049 update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib,
1050 prxstat);
1051 r8712_recv_entry(precvframe);
1052 transfer_len -= pkt_offset;
1053 pbuf += pkt_offset;
1054 pkt_cnt--;
1055 precvframe = NULL;
1056 pkt_copy = NULL;
1057 } while ((transfer_len > 0) && pkt_cnt > 0);
1058}
1059
1060static void recv_tasklet(unsigned long priv)
1061{
1062 struct sk_buff *pskb;
1063 struct _adapter *padapter = (struct _adapter *)priv;
1064 struct recv_priv *precvpriv = &padapter->recvpriv;
1065
1066 while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
1067 recvbuf2recvframe(padapter, pskb);
1068 skb_reset_tail_pointer(pskb);
1069 pskb->len = 0;
1070 if (!skb_cloned(pskb))
1071 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
1072 else
1073 consume_skb(pskb);
1074 }
1075}
1076