1 /******************************************************************************
2 * rtl8712_recv.c
3 *
4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5 * Linux device driver for RTL8192SU
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 *
20 * Modifications for inclusion into the Linux staging tree are
21 * Copyright(c) 2010 Larry Finger. All rights reserved.
22 *
23 * Contact information:
24 * WLAN FAE <wlanfae@realtek.com>
25 * Larry Finger <Larry.Finger@lwfinger.net>
26 *
27 ******************************************************************************/
28
29 #define _RTL8712_RECV_C_
30
31 #include <linux/if_ether.h>
32 #include <linux/ip.h>
33
34 #include "osdep_service.h"
35 #include "drv_types.h"
36 #include "recv_osdep.h"
37 #include "mlme_osdep.h"
38 #include "ethernet.h"
39 #include "usb_ops.h"
40 #include "wifi.h"
41
42 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
43 static u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
44
45 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
46 static u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
47
48 static void recv_tasklet(void *priv);
49
r8712_init_recv_priv(struct recv_priv * precvpriv,struct _adapter * padapter)50 int r8712_init_recv_priv(struct recv_priv *precvpriv, struct _adapter *padapter)
51 {
52 int i;
53 struct recv_buf *precvbuf;
54 int res = _SUCCESS;
55 addr_t tmpaddr = 0;
56 int alignment = 0;
57 struct sk_buff *pskb = NULL;
58
59 /*init recv_buf*/
60 _init_queue(&precvpriv->free_recv_buf_queue);
61 precvpriv->pallocated_recv_buf =
62 kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4, GFP_ATOMIC);
63 if (!precvpriv->pallocated_recv_buf)
64 return _FAIL;
65 precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 -
66 ((addr_t) (precvpriv->pallocated_recv_buf) & 3);
67 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
68 for (i = 0; i < NR_RECVBUFF; i++) {
69 INIT_LIST_HEAD(&precvbuf->list);
70 spin_lock_init(&precvbuf->recvbuf_lock);
71 res = r8712_os_recvbuf_resource_alloc(padapter, precvbuf);
72 if (res == _FAIL)
73 break;
74 precvbuf->ref_cnt = 0;
75 precvbuf->adapter = padapter;
76 list_add_tail(&precvbuf->list,
77 &(precvpriv->free_recv_buf_queue.queue));
78 precvbuf++;
79 }
80 precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
81 tasklet_init(&precvpriv->recv_tasklet,
82 (void(*)(unsigned long))recv_tasklet,
83 (unsigned long)padapter);
84 skb_queue_head_init(&precvpriv->rx_skb_queue);
85
86 skb_queue_head_init(&precvpriv->free_recv_skb_queue);
87 for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
88 pskb = netdev_alloc_skb(padapter->pnetdev, MAX_RECVBUF_SZ +
89 RECVBUFF_ALIGN_SZ);
90 if (pskb) {
91 tmpaddr = (addr_t)pskb->data;
92 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
93 skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignment));
94 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
95 }
96 pskb = NULL;
97 }
98 return res;
99 }
100
r8712_free_recv_priv(struct recv_priv * precvpriv)101 void r8712_free_recv_priv(struct recv_priv *precvpriv)
102 {
103 int i;
104 struct recv_buf *precvbuf;
105 struct _adapter *padapter = precvpriv->adapter;
106
107 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
108 for (i = 0; i < NR_RECVBUFF; i++) {
109 r8712_os_recvbuf_resource_free(padapter, precvbuf);
110 precvbuf++;
111 }
112 kfree(precvpriv->pallocated_recv_buf);
113 skb_queue_purge(&precvpriv->rx_skb_queue);
114 if (skb_queue_len(&precvpriv->rx_skb_queue))
115 netdev_warn(padapter->pnetdev, "r8712u: rx_skb_queue not empty\n");
116 skb_queue_purge(&precvpriv->free_recv_skb_queue);
117 if (skb_queue_len(&precvpriv->free_recv_skb_queue))
118 netdev_warn(padapter->pnetdev, "r8712u: free_recv_skb_queue not empty %d\n",
119 skb_queue_len(&precvpriv->free_recv_skb_queue));
120 }
121
r8712_init_recvbuf(struct _adapter * padapter,struct recv_buf * precvbuf)122 int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
123 {
124 precvbuf->transfer_len = 0;
125 precvbuf->len = 0;
126 precvbuf->ref_cnt = 0;
127 if (precvbuf->pbuf) {
128 precvbuf->pdata = precvbuf->pbuf;
129 precvbuf->phead = precvbuf->pbuf;
130 precvbuf->ptail = precvbuf->pbuf;
131 precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ;
132 }
133 return _SUCCESS;
134 }
135
r8712_free_recvframe(union recv_frame * precvframe,struct __queue * pfree_recv_queue)136 int r8712_free_recvframe(union recv_frame *precvframe,
137 struct __queue *pfree_recv_queue)
138 {
139 unsigned long irqL;
140 struct _adapter *padapter = precvframe->u.hdr.adapter;
141 struct recv_priv *precvpriv = &padapter->recvpriv;
142
143 if (precvframe->u.hdr.pkt) {
144 dev_kfree_skb_any(precvframe->u.hdr.pkt);/*free skb by driver*/
145 precvframe->u.hdr.pkt = NULL;
146 }
147 spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
148 list_del_init(&(precvframe->u.hdr.list));
149 list_add_tail(&(precvframe->u.hdr.list), &pfree_recv_queue->queue);
150 if (padapter != NULL) {
151 if (pfree_recv_queue == &precvpriv->free_recv_queue)
152 precvpriv->free_recvframe_cnt++;
153 }
154 spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
155 return _SUCCESS;
156 }
157
update_recvframe_attrib_from_recvstat(struct rx_pkt_attrib * pattrib,struct recv_stat * prxstat)158 static void update_recvframe_attrib_from_recvstat(struct rx_pkt_attrib *pattrib,
159 struct recv_stat *prxstat)
160 {
161 u16 drvinfo_sz;
162
163 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
164 drvinfo_sz <<= 3;
165 /*TODO:
166 * Offset 0
167 */
168 pattrib->bdecrypted = ((le32_to_cpu(prxstat->rxdw0) & BIT(27)) >> 27)
169 ? 0 : 1;
170 pattrib->crc_err = (le32_to_cpu(prxstat->rxdw0) & BIT(14)) >> 14;
171 /*Offset 4*/
172 /*Offset 8*/
173 /*Offset 12*/
174 if (le32_to_cpu(prxstat->rxdw3) & BIT(13)) {
175 pattrib->tcpchk_valid = 1; /* valid */
176 if (le32_to_cpu(prxstat->rxdw3) & BIT(11))
177 pattrib->tcp_chkrpt = 1; /* correct */
178 else
179 pattrib->tcp_chkrpt = 0; /* incorrect */
180 if (le32_to_cpu(prxstat->rxdw3) & BIT(12))
181 pattrib->ip_chkrpt = 1; /* correct */
182 else
183 pattrib->ip_chkrpt = 0; /* incorrect */
184 } else {
185 pattrib->tcpchk_valid = 0; /* invalid */
186 }
187 pattrib->mcs_rate = (u8)((le32_to_cpu(prxstat->rxdw3)) & 0x3f);
188 pattrib->htc = (u8)((le32_to_cpu(prxstat->rxdw3) >> 14) & 0x1);
189 /*Offset 16*/
190 /*Offset 20*/
191 /*phy_info*/
192 }
193
194 /*perform defrag*/
recvframe_defrag(struct _adapter * adapter,struct __queue * defrag_q)195 static union recv_frame *recvframe_defrag(struct _adapter *adapter,
196 struct __queue *defrag_q)
197 {
198 struct list_head *plist, *phead;
199 u8 wlanhdr_offset;
200 u8 curfragnum;
201 struct recv_frame_hdr *pfhdr, *pnfhdr;
202 union recv_frame *prframe, *pnextrframe;
203 struct __queue *pfree_recv_queue;
204
205 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
206 phead = &defrag_q->queue;
207 plist = phead->next;
208 prframe = container_of(plist, union recv_frame, u.list);
209 list_del_init(&prframe->u.list);
210 pfhdr = &prframe->u.hdr;
211 curfragnum = 0;
212 if (curfragnum != pfhdr->attrib.frag_num) {
213 /*the first fragment number must be 0
214 *free the whole queue
215 */
216 r8712_free_recvframe(prframe, pfree_recv_queue);
217 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
218 return NULL;
219 }
220 curfragnum++;
221 plist = &defrag_q->queue;
222 plist = plist->next;
223 while (!end_of_queue_search(phead, plist)) {
224 pnextrframe = container_of(plist, union recv_frame, u.list);
225 pnfhdr = &pnextrframe->u.hdr;
226 /*check the fragment sequence (2nd ~n fragment frame) */
227 if (curfragnum != pnfhdr->attrib.frag_num) {
228 /* the fragment number must increase (after decache)
229 * release the defrag_q & prframe
230 */
231 r8712_free_recvframe(prframe, pfree_recv_queue);
232 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
233 return NULL;
234 }
235 curfragnum++;
236 /* copy the 2nd~n fragment frame's payload to the first fragment
237 * get the 2nd~last fragment frame's payload
238 */
239 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
240 recvframe_pull(pnextrframe, wlanhdr_offset);
241 /* append to first fragment frame's tail (if privacy frame,
242 * pull the ICV)
243 */
244 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
245 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
246 recvframe_put(prframe, pnfhdr->len);
247 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
248 plist = plist->next;
249 }
250 /* free the defrag_q queue and return the prframe */
251 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
252 return prframe;
253 }
254
255 /* check if need to defrag, if needed queue the frame to defrag_q */
r8712_recvframe_chk_defrag(struct _adapter * padapter,union recv_frame * precv_frame)256 union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter,
257 union recv_frame *precv_frame)
258 {
259 u8 ismfrag;
260 u8 fragnum;
261 u8 *psta_addr;
262 struct recv_frame_hdr *pfhdr;
263 struct sta_info *psta;
264 struct sta_priv *pstapriv;
265 struct list_head *phead;
266 union recv_frame *prtnframe = NULL;
267 struct __queue *pfree_recv_queue, *pdefrag_q;
268
269 pstapriv = &padapter->stapriv;
270 pfhdr = &precv_frame->u.hdr;
271 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
272 /* need to define struct of wlan header frame ctrl */
273 ismfrag = pfhdr->attrib.mfrag;
274 fragnum = pfhdr->attrib.frag_num;
275 psta_addr = pfhdr->attrib.ta;
276 psta = r8712_get_stainfo(pstapriv, psta_addr);
277 if (!psta)
278 pdefrag_q = NULL;
279 else
280 pdefrag_q = &psta->sta_recvpriv.defrag_q;
281
282 if ((ismfrag == 0) && (fragnum == 0))
283 prtnframe = precv_frame;/*isn't a fragment frame*/
284 if (ismfrag == 1) {
285 /* 0~(n-1) fragment frame
286 * enqueue to defraf_g
287 */
288 if (pdefrag_q != NULL) {
289 if (fragnum == 0) {
290 /*the first fragment*/
291 if (!list_empty(&pdefrag_q->queue)) {
292 /*free current defrag_q */
293 r8712_free_recvframe_queue(pdefrag_q,
294 pfree_recv_queue);
295 }
296 }
297 /* Then enqueue the 0~(n-1) fragment to the defrag_q */
298 phead = &pdefrag_q->queue;
299 list_add_tail(&pfhdr->list, phead);
300 prtnframe = NULL;
301 } else {
302 /* can't find this ta's defrag_queue, so free this
303 * recv_frame
304 */
305 r8712_free_recvframe(precv_frame, pfree_recv_queue);
306 prtnframe = NULL;
307 }
308
309 }
310 if ((ismfrag == 0) && (fragnum != 0)) {
311 /* the last fragment frame
312 * enqueue the last fragment
313 */
314 if (pdefrag_q != NULL) {
315 phead = &pdefrag_q->queue;
316 list_add_tail(&pfhdr->list, phead);
317 /*call recvframe_defrag to defrag*/
318 precv_frame = recvframe_defrag(padapter, pdefrag_q);
319 prtnframe = precv_frame;
320 } else {
321 /* can't find this ta's defrag_queue, so free this
322 * recv_frame
323 */
324 r8712_free_recvframe(precv_frame, pfree_recv_queue);
325 prtnframe = NULL;
326 }
327 }
328 if ((prtnframe != NULL) && (prtnframe->u.hdr.attrib.privacy)) {
329 /* after defrag we must check tkip mic code */
330 if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) {
331 r8712_free_recvframe(prtnframe, pfree_recv_queue);
332 prtnframe = NULL;
333 }
334 }
335 return prtnframe;
336 }
337
amsdu_to_msdu(struct _adapter * padapter,union recv_frame * prframe)338 static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
339 {
340 int a_len, padding_len;
341 u16 eth_type, nSubframe_Length;
342 u8 nr_subframes, i;
343 unsigned char *pdata;
344 struct rx_pkt_attrib *pattrib;
345 _pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
346 struct recv_priv *precvpriv = &padapter->recvpriv;
347 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
348
349 nr_subframes = 0;
350 pattrib = &prframe->u.hdr.attrib;
351 recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);
352 if (prframe->u.hdr.attrib.iv_len > 0)
353 recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);
354 a_len = prframe->u.hdr.len;
355 pdata = prframe->u.hdr.rx_data;
356 while (a_len > ETH_HLEN) {
357 /* Offset 12 denote 2 mac address */
358 nSubframe_Length = *((u16 *)(pdata + 12));
359 /*==m==>change the length order*/
360 nSubframe_Length = (nSubframe_Length >> 8) +
361 (nSubframe_Length << 8);
362 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
363 netdev_warn(padapter->pnetdev, "r8712u: nRemain_Length is %d and nSubframe_Length is: %d\n",
364 a_len, nSubframe_Length);
365 goto exit;
366 }
367 /* move the data point to data content */
368 pdata += ETH_HLEN;
369 a_len -= ETH_HLEN;
370 /* Allocate new skb for releasing to upper layer */
371 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
372 if (!sub_skb)
373 break;
374 skb_reserve(sub_skb, 12);
375 skb_put_data(sub_skb, pdata, nSubframe_Length);
376 subframes[nr_subframes++] = sub_skb;
377 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
378 netdev_warn(padapter->pnetdev, "r8712u: ParseSubframe(): Too many Subframes! Packets dropped!\n");
379 break;
380 }
381 pdata += nSubframe_Length;
382 a_len -= nSubframe_Length;
383 if (a_len != 0) {
384 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3);
385 if (padding_len == 4)
386 padding_len = 0;
387 if (a_len < padding_len)
388 goto exit;
389 pdata += padding_len;
390 a_len -= padding_len;
391 }
392 }
393 for (i = 0; i < nr_subframes; i++) {
394 sub_skb = subframes[i];
395 /* convert hdr + possible LLC headers into Ethernet header */
396 eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7];
397 if (sub_skb->len >= 8 &&
398 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
399 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
400 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
401 /* remove RFC1042 or Bridge-Tunnel encapsulation and
402 * replace EtherType
403 */
404 skb_pull(sub_skb, SNAP_SIZE);
405 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
406 ETH_ALEN);
407 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
408 ETH_ALEN);
409 } else {
410 __be16 len;
411 /* Leave Ethernet header part of hdr and full payload */
412 len = htons(sub_skb->len);
413 memcpy(skb_push(sub_skb, 2), &len, 2);
414 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
415 ETH_ALEN);
416 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
417 ETH_ALEN);
418 }
419 /* Indicate the packets to upper layer */
420 if (sub_skb) {
421 sub_skb->protocol =
422 eth_type_trans(sub_skb, padapter->pnetdev);
423 sub_skb->dev = padapter->pnetdev;
424 if ((pattrib->tcpchk_valid == 1) &&
425 (pattrib->tcp_chkrpt == 1)) {
426 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
427 } else {
428 sub_skb->ip_summed = CHECKSUM_NONE;
429 }
430 netif_rx(sub_skb);
431 }
432 }
433 exit:
434 prframe->u.hdr.len = 0;
435 r8712_free_recvframe(prframe, pfree_recv_queue);
436 return _SUCCESS;
437 }
438
r8712_rxcmd_event_hdl(struct _adapter * padapter,void * prxcmdbuf)439 void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
440 {
441 __le32 voffset;
442 u8 *poffset;
443 u16 cmd_len, drvinfo_sz;
444 struct recv_stat *prxstat;
445
446 poffset = prxcmdbuf;
447 voffset = *(__le32 *)poffset;
448 prxstat = prxcmdbuf;
449 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
450 drvinfo_sz <<= 3;
451 poffset += RXDESC_SIZE + drvinfo_sz;
452 do {
453 voffset = *(__le32 *)poffset;
454 cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
455 r8712_event_handle(padapter, (__le32 *)poffset);
456 poffset += (cmd_len + 8);/*8 bytes alignment*/
457 } while (le32_to_cpu(voffset) & BIT(31));
458
459 }
460
check_indicate_seq(struct recv_reorder_ctrl * preorder_ctrl,u16 seq_num)461 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl,
462 u16 seq_num)
463 {
464 u8 wsize = preorder_ctrl->wsize_b;
465 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) % 4096;
466
467 /* Rx Reorder initialize condition.*/
468 if (preorder_ctrl->indicate_seq == 0xffff)
469 preorder_ctrl->indicate_seq = seq_num;
470 /* Drop out the packet which SeqNum is smaller than WinStart */
471 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
472 return false;
473 /*
474 * Sliding window manipulation. Conditions includes:
475 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
476 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
477 */
478 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq))
479 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq +
480 1) % 4096;
481 else if (SN_LESS(wend, seq_num)) {
482 if (seq_num >= (wsize - 1))
483 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
484 else
485 preorder_ctrl->indicate_seq = 4095 - (wsize -
486 (seq_num + 1)) + 1;
487 }
488 return true;
489 }
490
enqueue_reorder_recvframe(struct recv_reorder_ctrl * preorder_ctrl,union recv_frame * prframe)491 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
492 union recv_frame *prframe)
493 {
494 struct list_head *phead, *plist;
495 union recv_frame *pnextrframe;
496 struct rx_pkt_attrib *pnextattrib;
497 struct __queue *ppending_recvframe_queue =
498 &preorder_ctrl->pending_recvframe_queue;
499 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
500
501 phead = &ppending_recvframe_queue->queue;
502 plist = phead->next;
503 while (!end_of_queue_search(phead, plist)) {
504 pnextrframe = container_of(plist, union recv_frame, u.list);
505 pnextattrib = &pnextrframe->u.hdr.attrib;
506 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
507 plist = plist->next;
508 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
509 return false;
510 else
511 break;
512 }
513 list_del_init(&(prframe->u.hdr.list));
514 list_add_tail(&(prframe->u.hdr.list), plist);
515 return true;
516 }
517
r8712_recv_indicatepkts_in_order(struct _adapter * padapter,struct recv_reorder_ctrl * preorder_ctrl,int bforced)518 int r8712_recv_indicatepkts_in_order(struct _adapter *padapter,
519 struct recv_reorder_ctrl *preorder_ctrl,
520 int bforced)
521 {
522 struct list_head *phead, *plist;
523 union recv_frame *prframe;
524 struct rx_pkt_attrib *pattrib;
525 int bPktInBuf = false;
526 struct recv_priv *precvpriv = &padapter->recvpriv;
527 struct __queue *ppending_recvframe_queue =
528 &preorder_ctrl->pending_recvframe_queue;
529
530 phead = &ppending_recvframe_queue->queue;
531 plist = phead->next;
532 /* Handling some condition for forced indicate case.*/
533 if (bforced) {
534 if (list_empty(phead))
535 return true;
536
537 prframe = container_of(plist, union recv_frame, u.list);
538 pattrib = &prframe->u.hdr.attrib;
539 preorder_ctrl->indicate_seq = pattrib->seq_num;
540 }
541 /* Prepare indication list and indication.
542 * Check if there is any packet need indicate.
543 */
544 while (!list_empty(phead)) {
545 prframe = container_of(plist, union recv_frame, u.list);
546 pattrib = &prframe->u.hdr.attrib;
547 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
548 plist = plist->next;
549 list_del_init(&(prframe->u.hdr.list));
550 if (SN_EQUAL(preorder_ctrl->indicate_seq,
551 pattrib->seq_num))
552 preorder_ctrl->indicate_seq =
553 (preorder_ctrl->indicate_seq + 1) % 4096;
554 /*indicate this recv_frame*/
555 if (!pattrib->amsdu) {
556 if (!padapter->bDriverStopped &&
557 !padapter->bSurpriseRemoved) {
558 /* indicate this recv_frame */
559 r8712_recv_indicatepkt(padapter,
560 prframe);
561 }
562 } else if (pattrib->amsdu == 1) {
563 if (amsdu_to_msdu(padapter, prframe) !=
564 _SUCCESS)
565 r8712_free_recvframe(prframe,
566 &precvpriv->free_recv_queue);
567 }
568 /* Update local variables. */
569 bPktInBuf = false;
570 } else {
571 bPktInBuf = true;
572 break;
573 }
574 }
575 return bPktInBuf;
576 }
577
recv_indicatepkt_reorder(struct _adapter * padapter,union recv_frame * prframe)578 static int recv_indicatepkt_reorder(struct _adapter *padapter,
579 union recv_frame *prframe)
580 {
581 unsigned long irql;
582 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
583 struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
584 struct __queue *ppending_recvframe_queue =
585 &preorder_ctrl->pending_recvframe_queue;
586
587 if (!pattrib->amsdu) {
588 /* s1. */
589 r8712_wlanhdr_to_ethhdr(prframe);
590 if (pattrib->qos != 1) {
591 if (!padapter->bDriverStopped &&
592 !padapter->bSurpriseRemoved) {
593 r8712_recv_indicatepkt(padapter, prframe);
594 return _SUCCESS;
595 } else {
596 return _FAIL;
597 }
598 }
599 }
600 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
601 /*s2. check if winstart_b(indicate_seq) needs to be updated*/
602 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num))
603 goto _err_exit;
604 /*s3. Insert all packet into Reorder Queue to maintain its ordering.*/
605 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
606 goto _err_exit;
607 /*s4.
608 * Indication process.
609 * After Packet dropping and Sliding Window shifting as above, we can
610 * now just indicate the packets with the SeqNum smaller than latest
611 * WinStart and buffer other packets.
612 *
613 * For Rx Reorder condition:
614 * 1. All packets with SeqNum smaller than WinStart => Indicate
615 * 2. All packets with SeqNum larger than or equal to
616 * WinStart => Buffer it.
617 */
618 if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false) ==
619 true) {
620 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
621 jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
622 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
623 } else {
624 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
625 del_timer(&preorder_ctrl->reordering_ctrl_timer);
626 }
627 return _SUCCESS;
628 _err_exit:
629 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
630 return _FAIL;
631 }
632
r8712_reordering_ctrl_timeout_handler(void * pcontext)633 void r8712_reordering_ctrl_timeout_handler(void *pcontext)
634 {
635 unsigned long irql;
636 struct recv_reorder_ctrl *preorder_ctrl = pcontext;
637 struct _adapter *padapter = preorder_ctrl->padapter;
638 struct __queue *ppending_recvframe_queue =
639 &preorder_ctrl->pending_recvframe_queue;
640
641 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
642 return;
643 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
644 r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, true);
645 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
646 }
647
r8712_process_recv_indicatepkts(struct _adapter * padapter,union recv_frame * prframe)648 static int r8712_process_recv_indicatepkts(struct _adapter *padapter,
649 union recv_frame *prframe)
650 {
651 int retval = _SUCCESS;
652 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
653 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
654
655 if (phtpriv->ht_option == 1) { /*B/G/N Mode*/
656 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
657 /* including perform A-MPDU Rx Ordering Buffer Control*/
658 if (!padapter->bDriverStopped &&
659 !padapter->bSurpriseRemoved)
660 return _FAIL;
661 }
662 } else { /*B/G mode*/
663 retval = r8712_wlanhdr_to_ethhdr(prframe);
664 if (retval != _SUCCESS)
665 return retval;
666 if (!padapter->bDriverStopped && !padapter->bSurpriseRemoved) {
667 /* indicate this recv_frame */
668 r8712_recv_indicatepkt(padapter, prframe);
669 } else {
670 return _FAIL;
671 }
672 }
673 return retval;
674 }
675
query_rx_pwr_percentage(s8 antpower)676 static u8 query_rx_pwr_percentage(s8 antpower)
677 {
678 if ((antpower <= -100) || (antpower >= 20))
679 return 0;
680 else if (antpower >= 0)
681 return 100;
682 else
683 return 100 + antpower;
684 }
685
evm_db2percentage(s8 value)686 static u8 evm_db2percentage(s8 value)
687 {
688 /*
689 * -33dB~0dB to 0%~99%
690 */
691 s8 ret_val;
692
693 ret_val = value;
694 if (ret_val >= 0)
695 ret_val = 0;
696 if (ret_val <= -33)
697 ret_val = -33;
698 ret_val = -ret_val;
699 ret_val *= 3;
700 if (ret_val == 99)
701 ret_val = 100;
702 return ret_val;
703 }
704
r8712_signal_scale_mapping(s32 cur_sig)705 s32 r8712_signal_scale_mapping(s32 cur_sig)
706 {
707 s32 ret_sig;
708
709 if (cur_sig >= 51 && cur_sig <= 100)
710 ret_sig = 100;
711 else if (cur_sig >= 41 && cur_sig <= 50)
712 ret_sig = 80 + ((cur_sig - 40) * 2);
713 else if (cur_sig >= 31 && cur_sig <= 40)
714 ret_sig = 66 + (cur_sig - 30);
715 else if (cur_sig >= 21 && cur_sig <= 30)
716 ret_sig = 54 + (cur_sig - 20);
717 else if (cur_sig >= 10 && cur_sig <= 20)
718 ret_sig = 42 + (((cur_sig - 10) * 2) / 3);
719 else if (cur_sig >= 5 && cur_sig <= 9)
720 ret_sig = 22 + (((cur_sig - 5) * 3) / 2);
721 else if (cur_sig >= 1 && cur_sig <= 4)
722 ret_sig = 6 + (((cur_sig - 1) * 3) / 2);
723 else
724 ret_sig = cur_sig;
725 return ret_sig;
726 }
727
translate2dbm(struct _adapter * padapter,u8 signal_strength_idx)728 static s32 translate2dbm(struct _adapter *padapter, u8 signal_strength_idx)
729 {
730 s32 signal_power; /* in dBm.*/
731 /* Translate to dBm (x=0.5y-95).*/
732 signal_power = (s32)((signal_strength_idx + 1) >> 1);
733 signal_power -= 95;
734 return signal_power;
735 }
736
query_rx_phy_status(struct _adapter * padapter,union recv_frame * prframe)737 static void query_rx_phy_status(struct _adapter *padapter,
738 union recv_frame *prframe)
739 {
740 u8 i, max_spatial_stream, evm;
741 struct recv_stat *prxstat = (struct recv_stat *)prframe->u.hdr.rx_head;
742 struct phy_stat *pphy_stat = (struct phy_stat *)(prxstat + 1);
743 u8 *pphy_head = (u8 *)(prxstat + 1);
744 s8 rx_pwr[4], rx_pwr_all;
745 u8 pwdb_all;
746 u32 rssi, total_rssi = 0;
747 u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0;
748 struct phy_cck_rx_status *pcck_buf;
749 u8 sq;
750
751 /* Record it for next packet processing*/
752 bcck_rate = (prframe->u.hdr.attrib.mcs_rate <= 3 ? 1 : 0);
753 if (bcck_rate) {
754 u8 report;
755
756 /* CCK Driver info Structure is not the same as OFDM packet.*/
757 pcck_buf = (struct phy_cck_rx_status *)pphy_stat;
758 /* (1)Hardware does not provide RSSI for CCK
759 * (2)PWDB, Average PWDB calculated by hardware
760 * (for rate adaptive)
761 */
762 if (!cck_highpwr) {
763 report = pcck_buf->cck_agc_rpt & 0xc0;
764 report >>= 6;
765 switch (report) {
766 /* Modify the RF RNA gain value to -40, -20,
767 * -2, 14 by Jenyu's suggestion
768 * Note: different RF with the different
769 * RNA gain.
770 */
771 case 0x3:
772 rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
773 0x3e);
774 break;
775 case 0x2:
776 rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
777 0x3e);
778 break;
779 case 0x1:
780 rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
781 0x3e);
782 break;
783 case 0x0:
784 rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
785 0x3e);
786 break;
787 }
788 } else {
789 report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
790 0x60;
791 report >>= 5;
792 switch (report) {
793 case 0x3:
794 rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
795 0x1f) << 1);
796 break;
797 case 0x2:
798 rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
799 0x1f) << 1);
800 break;
801 case 0x1:
802 rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
803 0x1f) << 1);
804 break;
805 case 0x0:
806 rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
807 0x1f) << 1);
808 break;
809 }
810 }
811 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
812 /* CCK gain is smaller than OFDM/MCS gain,*/
813 /* so we add gain diff by experiences, the val is 6 */
814 pwdb_all += 6;
815 if (pwdb_all > 100)
816 pwdb_all = 100;
817 /* modify the offset to make the same gain index with OFDM.*/
818 if (pwdb_all > 34 && pwdb_all <= 42)
819 pwdb_all -= 2;
820 else if (pwdb_all > 26 && pwdb_all <= 34)
821 pwdb_all -= 6;
822 else if (pwdb_all > 14 && pwdb_all <= 26)
823 pwdb_all -= 8;
824 else if (pwdb_all > 4 && pwdb_all <= 14)
825 pwdb_all -= 4;
826 /*
827 * (3) Get Signal Quality (EVM)
828 */
829 if (pwdb_all > 40) {
830 sq = 100;
831 } else {
832 sq = pcck_buf->sq_rpt;
833 if (pcck_buf->sq_rpt > 64)
834 sq = 0;
835 else if (pcck_buf->sq_rpt < 20)
836 sq = 100;
837 else
838 sq = ((64 - sq) * 100) / 44;
839 }
840 prframe->u.hdr.attrib.signal_qual = sq;
841 prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq;
842 prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1;
843 } else {
844 /* (1)Get RSSI for HT rate */
845 for (i = 0; i < ((padapter->registrypriv.rf_config) &
846 0x0f); i++) {
847 rf_rx_num++;
848 rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i]
849 & 0x3F) * 2) - 110;
850 /* Translate DBM to percentage. */
851 rssi = query_rx_pwr_percentage(rx_pwr[i]);
852 total_rssi += rssi;
853 }
854 /* (2)PWDB, Average PWDB calculated by hardware (for
855 * rate adaptive)
856 */
857 rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f)
858 - 106;
859 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
860
861 {
862 /* (3)EVM of HT rate */
863 if (prframe->u.hdr.attrib.htc &&
864 prframe->u.hdr.attrib.mcs_rate >= 20 &&
865 prframe->u.hdr.attrib.mcs_rate <= 27) {
866 /* both spatial stream make sense */
867 max_spatial_stream = 2;
868 } else {
869 /* only spatial stream 1 makes sense */
870 max_spatial_stream = 1;
871 }
872 for (i = 0; i < max_spatial_stream; i++) {
873 evm = evm_db2percentage((pphy_head
874 [PHY_STAT_RXEVM_SHT + i]));/*dbm*/
875 prframe->u.hdr.attrib.signal_qual =
876 (u8)(evm & 0xff);
877 prframe->u.hdr.attrib.rx_mimo_signal_qual[i] =
878 (u8)(evm & 0xff);
879 }
880 }
881 }
882 /* UI BSS List signal strength(in percentage), make it good looking,
883 * from 0~100. It is assigned to the BSS List in
884 * GetValueFromBeaconOrProbeRsp().
885 */
886 if (bcck_rate) {
887 prframe->u.hdr.attrib.signal_strength =
888 (u8)r8712_signal_scale_mapping(pwdb_all);
889 } else {
890 if (rf_rx_num != 0)
891 prframe->u.hdr.attrib.signal_strength =
892 (u8)(r8712_signal_scale_mapping(total_rssi /=
893 rf_rx_num));
894 }
895 }
896
process_link_qual(struct _adapter * padapter,union recv_frame * prframe)897 static void process_link_qual(struct _adapter *padapter,
898 union recv_frame *prframe)
899 {
900 u32 last_evm = 0, tmpVal;
901 struct rx_pkt_attrib *pattrib;
902 struct smooth_rssi_data *sqd = &padapter->recvpriv.signal_qual_data;
903
904 if (prframe == NULL || padapter == NULL)
905 return;
906 pattrib = &prframe->u.hdr.attrib;
907 if (pattrib->signal_qual != 0) {
908 /*
909 * 1. Record the general EVM to the sliding window.
910 */
911 if (sqd->total_num++ >= PHY_LINKQUALITY_SLID_WIN_MAX) {
912 sqd->total_num = PHY_LINKQUALITY_SLID_WIN_MAX;
913 last_evm = sqd->elements[sqd->index];
914 sqd->total_val -= last_evm;
915 }
916 sqd->total_val += pattrib->signal_qual;
917 sqd->elements[sqd->index++] = pattrib->signal_qual;
918 if (sqd->index >= PHY_LINKQUALITY_SLID_WIN_MAX)
919 sqd->index = 0;
920
921 /* <1> Showed on UI for user, in percentage. */
922 tmpVal = sqd->total_val / sqd->total_num;
923 padapter->recvpriv.signal = (u8)tmpVal;
924 }
925 }
926
process_rssi(struct _adapter * padapter,union recv_frame * prframe)927 static void process_rssi(struct _adapter *padapter, union recv_frame *prframe)
928 {
929 u32 last_rssi, tmp_val;
930 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
931 struct smooth_rssi_data *ssd = &padapter->recvpriv.signal_strength_data;
932
933 if (ssd->total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
934 ssd->total_num = PHY_RSSI_SLID_WIN_MAX;
935 last_rssi = ssd->elements[ssd->index];
936 ssd->total_val -= last_rssi;
937 }
938 ssd->total_val += pattrib->signal_strength;
939 ssd->elements[ssd->index++] = pattrib->signal_strength;
940 if (ssd->index >= PHY_RSSI_SLID_WIN_MAX)
941 ssd->index = 0;
942 tmp_val = ssd->total_val / ssd->total_num;
943 padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val);
944 }
945
process_phy_info(struct _adapter * padapter,union recv_frame * prframe)946 static void process_phy_info(struct _adapter *padapter,
947 union recv_frame *prframe)
948 {
949 query_rx_phy_status(padapter, prframe);
950 process_rssi(padapter, prframe);
951 process_link_qual(padapter, prframe);
952 }
953
recv_func(struct _adapter * padapter,void * pcontext)954 int recv_func(struct _adapter *padapter, void *pcontext)
955 {
956 struct rx_pkt_attrib *pattrib;
957 union recv_frame *prframe, *orig_prframe;
958 int retval = _SUCCESS;
959 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
960 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
961
962 prframe = pcontext;
963 orig_prframe = prframe;
964 pattrib = &prframe->u.hdr.attrib;
965 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
966 if (pattrib->crc_err == 1)
967 padapter->mppriv.rx_crcerrpktcount++;
968 else
969 padapter->mppriv.rx_pktcount++;
970 if (!check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE)) {
971 /* free this recv_frame */
972 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
973 goto _exit_recv_func;
974 }
975 }
976 /* check the frame crtl field and decache */
977 retval = r8712_validate_recv_frame(padapter, prframe);
978 if (retval != _SUCCESS) {
979 /* free this recv_frame */
980 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
981 goto _exit_recv_func;
982 }
983 process_phy_info(padapter, prframe);
984 prframe = r8712_decryptor(padapter, prframe);
985 if (!prframe) {
986 retval = _FAIL;
987 goto _exit_recv_func;
988 }
989 prframe = r8712_recvframe_chk_defrag(padapter, prframe);
990 if (!prframe)
991 goto _exit_recv_func;
992 prframe = r8712_portctrl(padapter, prframe);
993 if (!prframe) {
994 retval = _FAIL;
995 goto _exit_recv_func;
996 }
997 retval = r8712_process_recv_indicatepkts(padapter, prframe);
998 if (retval != _SUCCESS) {
999 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1000 goto _exit_recv_func;
1001 }
1002 _exit_recv_func:
1003 return retval;
1004 }
1005
recvbuf2recvframe(struct _adapter * padapter,struct sk_buff * pskb)1006 static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
1007 {
1008 u8 *pbuf, shift_sz = 0;
1009 u8 frag, mf;
1010 uint pkt_len;
1011 u32 transfer_len;
1012 struct recv_stat *prxstat;
1013 u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz;
1014 struct __queue *pfree_recv_queue;
1015 _pkt *pkt_copy = NULL;
1016 union recv_frame *precvframe = NULL;
1017 struct recv_priv *precvpriv = &padapter->recvpriv;
1018
1019 pfree_recv_queue = &(precvpriv->free_recv_queue);
1020 pbuf = pskb->data;
1021 prxstat = (struct recv_stat *)pbuf;
1022 pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff;
1023 pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff;
1024 transfer_len = pskb->len;
1025 /* Test throughput with Netgear 3700 (No security) with Chariot 3T3R
1026 * pairs. The packet count will be a big number so that the containing
1027 * packet will effect the Rx reordering.
1028 */
1029 if (transfer_len < pkt_len) {
1030 /* In this case, it means the MAX_RECVBUF_SZ is too small to
1031 * get the data from 8712u.
1032 */
1033 return _FAIL;
1034 }
1035 do {
1036 prxstat = (struct recv_stat *)pbuf;
1037 pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff;
1038 /* more fragment bit */
1039 mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1;
1040 /* ragmentation number */
1041 frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf;
1042 /* uint 2^3 = 8 bytes */
1043 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
1044 drvinfo_sz <<= 3;
1045 if (pkt_len <= 0)
1046 goto _exit_recvbuf2recvframe;
1047 /* Qos data, wireless lan header length is 26 */
1048 if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
1049 shift_sz = 2;
1050 precvframe = r8712_alloc_recvframe(pfree_recv_queue);
1051 if (!precvframe)
1052 goto _exit_recvbuf2recvframe;
1053 INIT_LIST_HEAD(&precvframe->u.hdr.list);
1054 precvframe->u.hdr.precvbuf = NULL; /*can't access the precvbuf*/
1055 precvframe->u.hdr.len = 0;
1056 tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE;
1057 pkt_offset = (u16)round_up(tmp_len, 128);
1058 /* for first fragment packet, driver need allocate 1536 +
1059 * drvinfo_sz + RXDESC_SIZE to defrag packet.
1060 */
1061 if ((mf == 1) && (frag == 0))
1062 /*1658+6=1664, 1664 is 128 alignment.*/
1063 alloc_sz = max_t(u16, tmp_len, 1658);
1064 else
1065 alloc_sz = tmp_len;
1066 /* 2 is for IP header 4 bytes alignment in QoS packet case.
1067 * 4 is for skb->data 4 bytes alignment.
1068 */
1069 alloc_sz += 6;
1070 pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
1071 if (pkt_copy) {
1072 precvframe->u.hdr.pkt = pkt_copy;
1073 skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data)
1074 % 4));
1075 skb_reserve(pkt_copy, shift_sz);
1076 memcpy(pkt_copy->data, pbuf, tmp_len);
1077 precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data =
1078 precvframe->u.hdr.rx_tail = pkt_copy->data;
1079 precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
1080 } else {
1081 precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC);
1082 if (!precvframe->u.hdr.pkt)
1083 return _FAIL;
1084 precvframe->u.hdr.rx_head = pbuf;
1085 precvframe->u.hdr.rx_data = pbuf;
1086 precvframe->u.hdr.rx_tail = pbuf;
1087 precvframe->u.hdr.rx_end = pbuf + alloc_sz;
1088 }
1089 recvframe_put(precvframe, tmp_len);
1090 recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
1091 /* because the endian issue, driver avoid reference to the
1092 * rxstat after calling update_recvframe_attrib_from_recvstat();
1093 */
1094 update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib,
1095 prxstat);
1096 r8712_recv_entry(precvframe);
1097 transfer_len -= pkt_offset;
1098 pbuf += pkt_offset;
1099 pkt_cnt--;
1100 precvframe = NULL;
1101 pkt_copy = NULL;
1102 } while ((transfer_len > 0) && pkt_cnt > 0);
1103 _exit_recvbuf2recvframe:
1104 return _SUCCESS;
1105 }
1106
recv_tasklet(void * priv)1107 static void recv_tasklet(void *priv)
1108 {
1109 struct sk_buff *pskb;
1110 struct _adapter *padapter = priv;
1111 struct recv_priv *precvpriv = &padapter->recvpriv;
1112
1113 while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
1114 recvbuf2recvframe(padapter, pskb);
1115 skb_reset_tail_pointer(pskb);
1116 pskb->len = 0;
1117 if (!skb_cloned(pskb))
1118 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
1119 else
1120 consume_skb(pskb);
1121 }
1122 }
1123
