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USB: ftdi_sio: Add more identifiers
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / rtl8712 / rtl8712_recv.c
blob6d692657e78403d695f5529dff86782bde7ecbbc
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 "osdep_service.h"
32 #include "drv_types.h"
33 #include "recv_osdep.h"
34 #include "mlme_osdep.h"
35 #include "ip.h"
36 #include "if_ether.h"
37 #include "ethernet.h"
38 #include "usb_ops.h"
39 #include "wifi.h"
40
41 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
42 static u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
43
44 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
45 static u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
46
47 static void recv_tasklet(void *priv);
48
49 int r8712_init_recv_priv(struct recv_priv *precvpriv, struct _adapter *padapter)
50 {
51 int i;
52 struct recv_buf *precvbuf;
53 int res = _SUCCESS;
54 addr_t tmpaddr = 0;
55 int alignment = 0;
56 struct sk_buff *pskb = NULL;
57
58 sema_init(&precvpriv->recv_sema, 0);
59 sema_init(&precvpriv->terminate_recvthread_sema, 0);
60 /*init recv_buf*/
61 _init_queue(&precvpriv->free_recv_buf_queue);
62 precvpriv->pallocated_recv_buf = _malloc(NR_RECVBUFF *
63 sizeof(struct recv_buf) + 4);
64 if (precvpriv->pallocated_recv_buf == NULL)
65 return _FAIL;
66 memset(precvpriv->pallocated_recv_buf, 0, NR_RECVBUFF *
67 sizeof(struct recv_buf) + 4);
68 precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 -
69 ((addr_t) (precvpriv->pallocated_recv_buf) & 3);
70 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
71 for (i = 0; i < NR_RECVBUFF; i++) {
72 _init_listhead(&precvbuf->list);
73 spin_lock_init(&precvbuf->recvbuf_lock);
74 res = r8712_os_recvbuf_resource_alloc(padapter, precvbuf);
75 if (res == _FAIL)
76 break;
77 precvbuf->ref_cnt = 0;
78 precvbuf->adapter = padapter;
79 list_insert_tail(&precvbuf->list,
80 &(precvpriv->free_recv_buf_queue.queue));
81 precvbuf++;
82 }
83 precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
84 tasklet_init(&precvpriv->recv_tasklet,
85 (void(*)(unsigned long))recv_tasklet,
86 (unsigned long)padapter);
87 skb_queue_head_init(&precvpriv->rx_skb_queue);
88
89 skb_queue_head_init(&precvpriv->free_recv_skb_queue);
90 for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
91 pskb = netdev_alloc_skb(padapter->pnetdev, MAX_RECVBUF_SZ +
92 RECVBUFF_ALIGN_SZ);
93 if (pskb) {
94 pskb->dev = padapter->pnetdev;
95 tmpaddr = (addr_t)pskb->data;
96 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
97 skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignment));
98 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
99 }
100 pskb = NULL;
101 }
102 return res;
103 }
104
105 void r8712_free_recv_priv(struct recv_priv *precvpriv)
106 {
107 int i;
108 struct recv_buf *precvbuf;
109 struct _adapter *padapter = precvpriv->adapter;
110
111 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
112 for (i = 0; i < NR_RECVBUFF ; i++) {
113 r8712_os_recvbuf_resource_free(padapter, precvbuf);
114 precvbuf++;
115 }
116 kfree(precvpriv->pallocated_recv_buf);
117 skb_queue_purge(&precvpriv->rx_skb_queue);
118 if (skb_queue_len(&precvpriv->rx_skb_queue))
119 printk(KERN_WARNING "r8712u: rx_skb_queue not empty\n");
120 skb_queue_purge(&precvpriv->free_recv_skb_queue);
121 if (skb_queue_len(&precvpriv->free_recv_skb_queue))
122 printk(KERN_WARNING "r8712u: free_recv_skb_queue not empty "
123 "%d\n", skb_queue_len(&precvpriv->free_recv_skb_queue));
124 }
125
126 int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
127 {
128 int res = _SUCCESS;
129
130 precvbuf->transfer_len = 0;
131 precvbuf->len = 0;
132 precvbuf->ref_cnt = 0;
133 if (precvbuf->pbuf) {
134 precvbuf->pdata = precvbuf->pbuf;
135 precvbuf->phead = precvbuf->pbuf;
136 precvbuf->ptail = precvbuf->pbuf;
137 precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ;
138 }
139 return res;
140 }
141
142 int r8712_free_recvframe(union recv_frame *precvframe,
143 struct __queue *pfree_recv_queue)
144 {
145 unsigned long irqL;
146 struct _adapter *padapter = precvframe->u.hdr.adapter;
147 struct recv_priv *precvpriv = &padapter->recvpriv;
148
149 if (precvframe->u.hdr.pkt) {
150 dev_kfree_skb_any(precvframe->u.hdr.pkt);/*free skb by driver*/
151 precvframe->u.hdr.pkt = NULL;
152 }
153 spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
154 list_delete(&(precvframe->u.hdr.list));
155 list_insert_tail(&(precvframe->u.hdr.list),
156 get_list_head(pfree_recv_queue));
157 if (padapter != NULL) {
158 if (pfree_recv_queue == &precvpriv->free_recv_queue)
159 precvpriv->free_recvframe_cnt++;
160 }
161 spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
162 return _SUCCESS;
163 }
164
165 static void update_recvframe_attrib_from_recvstat(struct rx_pkt_attrib *pattrib,
166 struct recv_stat *prxstat)
167 {
168 u32 *pphy_info;
169 struct phy_stat *pphy_stat;
170 u16 drvinfo_sz = 0;
171
172 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0)&0x000f0000)>>16;
173 drvinfo_sz = drvinfo_sz<<3;
174 /*TODO:
175 * Offset 0 */
176 pattrib->bdecrypted = ((le32_to_cpu(prxstat->rxdw0) & BIT(27)) >> 27)
177 ? 0 : 1;
178 pattrib->crc_err = ((le32_to_cpu(prxstat->rxdw0) & BIT(14)) >> 14);
179 /*Offset 4*/
180 /*Offset 8*/
181 /*Offset 12*/
182 if (le32_to_cpu(prxstat->rxdw3) & BIT(13)) {
183 pattrib->tcpchk_valid = 1; /* valid */
184 if (le32_to_cpu(prxstat->rxdw3) & BIT(11))
185 pattrib->tcp_chkrpt = 1; /* correct */
186 else
187 pattrib->tcp_chkrpt = 0; /* incorrect */
188 if (le32_to_cpu(prxstat->rxdw3) & BIT(12))
189 pattrib->ip_chkrpt = 1; /* correct */
190 else
191 pattrib->ip_chkrpt = 0; /* incorrect */
192 } else
193 pattrib->tcpchk_valid = 0; /* invalid */
194 pattrib->mcs_rate = (u8)((le32_to_cpu(prxstat->rxdw3)) & 0x3f);
195 pattrib->htc = (u8)((le32_to_cpu(prxstat->rxdw3) >> 14) & 0x1);
196 /*Offset 16*/
197 /*Offset 20*/
198 /*phy_info*/
199 if (drvinfo_sz) {
200 pphy_stat = (struct phy_stat *)(prxstat+1);
201 pphy_info = (u32 *)prxstat+1;
202 }
203 }
204
205 /*perform defrag*/
206 static union recv_frame *recvframe_defrag(struct _adapter *adapter,
207 struct __queue *defrag_q)
208 {
209 struct list_head *plist, *phead;
210 u8 *data, wlanhdr_offset;
211 u8 curfragnum;
212 struct recv_frame_hdr *pfhdr, *pnfhdr;
213 union recv_frame *prframe, *pnextrframe;
214 struct __queue *pfree_recv_queue;
215
216 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
217 phead = get_list_head(defrag_q);
218 plist = get_next(phead);
219 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
220 list_delete(&prframe->u.list);
221 pfhdr = &prframe->u.hdr;
222 curfragnum = 0;
223 if (curfragnum != pfhdr->attrib.frag_num) {
224 /*the first fragment number must be 0
225 *free the whole queue*/
226 r8712_free_recvframe(prframe, pfree_recv_queue);
227 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
228 return NULL;
229 }
230 curfragnum++;
231 plist = get_list_head(defrag_q);
232 plist = get_next(plist);
233 data = get_recvframe_data(prframe);
234 while (end_of_queue_search(phead, plist) == false) {
235 pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u);
236 pnfhdr = &pnextrframe->u.hdr;
237 /*check the fragment sequence (2nd ~n fragment frame) */
238 if (curfragnum != pnfhdr->attrib.frag_num) {
239 /* the fragment number must increase (after decache)
240 * release the defrag_q & prframe */
241 r8712_free_recvframe(prframe, pfree_recv_queue);
242 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
243 return NULL;
244 }
245 curfragnum++;
246 /* copy the 2nd~n fragment frame's payload to the first fragment
247 * get the 2nd~last fragment frame's payload */
248 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
249 recvframe_pull(pnextrframe, wlanhdr_offset);
250 /* append to first fragment frame's tail (if privacy frame,
251 * pull the ICV) */
252 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
253 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
254 recvframe_put(prframe, pnfhdr->len);
255 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
256 plist = get_next(plist);
257 }
258 /* free the defrag_q queue and return the prframe */
259 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
260 return prframe;
261 }
262
263 /* check if need to defrag, if needed queue the frame to defrag_q */
264 union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter,
265 union recv_frame *precv_frame)
266 {
267 u8 ismfrag;
268 u8 fragnum;
269 u8 *psta_addr;
270 struct recv_frame_hdr *pfhdr;
271 struct sta_info *psta;
272 struct sta_priv *pstapriv ;
273 struct list_head *phead;
274 union recv_frame *prtnframe = NULL;
275 struct __queue *pfree_recv_queue, *pdefrag_q;
276
277 pstapriv = &padapter->stapriv;
278 pfhdr = &precv_frame->u.hdr;
279 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
280 /* need to define struct of wlan header frame ctrl */
281 ismfrag = pfhdr->attrib.mfrag;
282 fragnum = pfhdr->attrib.frag_num;
283 psta_addr = pfhdr->attrib.ta;
284 psta = r8712_get_stainfo(pstapriv, psta_addr);
285 if (psta == NULL)
286 pdefrag_q = NULL;
287 else
288 pdefrag_q = &psta->sta_recvpriv.defrag_q;
289
290 if ((ismfrag == 0) && (fragnum == 0))
291 prtnframe = precv_frame;/*isn't a fragment frame*/
292 if (ismfrag == 1) {
293 /* 0~(n-1) fragment frame
294 * enqueue to defraf_g */
295 if (pdefrag_q != NULL) {
296 if (fragnum == 0) {
297 /*the first fragment*/
298 if (_queue_empty(pdefrag_q) == false) {
299 /*free current defrag_q */
300 r8712_free_recvframe_queue(pdefrag_q,
301 pfree_recv_queue);
302 }
303 }
304 /* Then enqueue the 0~(n-1) fragment to the defrag_q */
305 phead = get_list_head(pdefrag_q);
306 list_insert_tail(&pfhdr->list, phead);
307 prtnframe = NULL;
308 } else {
309 /* can't find this ta's defrag_queue, so free this
310 * recv_frame */
311 r8712_free_recvframe(precv_frame, pfree_recv_queue);
312 prtnframe = NULL;
313 }
314
315 }
316 if ((ismfrag == 0) && (fragnum != 0)) {
317 /* the last fragment frame
318 * enqueue the last fragment */
319 if (pdefrag_q != NULL) {
320 phead = get_list_head(pdefrag_q);
321 list_insert_tail(&pfhdr->list, phead);
322 /*call recvframe_defrag to defrag*/
323 precv_frame = recvframe_defrag(padapter, pdefrag_q);
324 prtnframe = precv_frame;
325 } else {
326 /* can't find this ta's defrag_queue, so free this
327 * recv_frame */
328 r8712_free_recvframe(precv_frame, pfree_recv_queue);
329 prtnframe = NULL;
330 }
331 }
332 if ((prtnframe != NULL) && (prtnframe->u.hdr.attrib.privacy)) {
333 /* after defrag we must check tkip mic code */
334 if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) {
335 r8712_free_recvframe(prtnframe, pfree_recv_queue);
336 prtnframe = NULL;
337 }
338 }
339 return prtnframe;
340 }
341
342 static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
343 {
344 int a_len, padding_len;
345 u16 eth_type, nSubframe_Length;
346 u8 nr_subframes, i;
347 unsigned char *data_ptr, *pdata;
348 struct rx_pkt_attrib *pattrib;
349 _pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
350 struct recv_priv *precvpriv = &padapter->recvpriv;
351 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
352 int ret = _SUCCESS;
353
354 nr_subframes = 0;
355 pattrib = &prframe->u.hdr.attrib;
356 recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);
357 if (prframe->u.hdr.attrib.iv_len > 0)
358 recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);
359 a_len = prframe->u.hdr.len;
360 pdata = prframe->u.hdr.rx_data;
361 while (a_len > ETH_HLEN) {
362 /* Offset 12 denote 2 mac address */
363 nSubframe_Length = *((u16 *)(pdata + 12));
364 /*==m==>change the length order*/
365 nSubframe_Length = (nSubframe_Length >> 8) +
366 (nSubframe_Length << 8);
367 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
368 printk(KERN_WARNING "r8712u: nRemain_Length is %d and"
369 " nSubframe_Length is: %d\n",
370 a_len, nSubframe_Length);
371 goto exit;
372 }
373 /* move the data point to data content */
374 pdata += ETH_HLEN;
375 a_len -= ETH_HLEN;
376 /* Allocate new skb for releasing to upper layer */
377 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
378 skb_reserve(sub_skb, 12);
379 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
380 memcpy(data_ptr, pdata, nSubframe_Length);
381 subframes[nr_subframes++] = sub_skb;
382 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
383 printk(KERN_WARNING "r8712u: ParseSubframe(): Too"
384 " many Subframes! Packets dropped!\n");
385 break;
386 }
387 pdata += nSubframe_Length;
388 a_len -= nSubframe_Length;
389 if (a_len != 0) {
390 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3);
391 if (padding_len == 4)
392 padding_len = 0;
393 if (a_len < padding_len)
394 goto exit;
395 pdata += padding_len;
396 a_len -= padding_len;
397 }
398 }
399 for (i = 0; i < nr_subframes; i++) {
400 sub_skb = subframes[i];
401 /* convert hdr + possible LLC headers into Ethernet header */
402 eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7];
403 if (sub_skb->len >= 8 &&
404 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
405 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
406 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
407 /* remove RFC1042 or Bridge-Tunnel encapsulation and
408 * replace EtherType */
409 skb_pull(sub_skb, SNAP_SIZE);
410 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
411 ETH_ALEN);
412 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
413 ETH_ALEN);
414 } else {
415 u16 len;
416 /* Leave Ethernet header part of hdr and full payload */
417 len = htons(sub_skb->len);
418 memcpy(skb_push(sub_skb, 2), &len, 2);
419 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
420 ETH_ALEN);
421 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
422 ETH_ALEN);
423 }
424 /* Indicate the packets to upper layer */
425 if (sub_skb) {
426 sub_skb->protocol =
427 eth_type_trans(sub_skb, padapter->pnetdev);
428 sub_skb->dev = padapter->pnetdev;
429 if ((pattrib->tcpchk_valid == 1) &&
430 (pattrib->tcp_chkrpt == 1)) {
431 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
432 } else
433 sub_skb->ip_summed = CHECKSUM_NONE;
434 netif_rx(sub_skb);
435 }
436 }
437 exit:
438 prframe->u.hdr.len = 0;
439 r8712_free_recvframe(prframe, pfree_recv_queue);
440 return ret;
441 }
442
443 void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
444 {
445 uint voffset;
446 u8 *poffset;
447 u16 pkt_len, cmd_len, drvinfo_sz;
448 u8 eid, cmd_seq;
449 struct recv_stat *prxstat;
450
451 poffset = (u8 *)prxcmdbuf;
452 voffset = *(uint *)poffset;
453 pkt_len = le32_to_cpu(voffset) & 0x00003fff;
454 prxstat = (struct recv_stat *)prxcmdbuf;
455 drvinfo_sz = ((le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16);
456 drvinfo_sz = drvinfo_sz << 3;
457 poffset += RXDESC_SIZE + drvinfo_sz;
458 do {
459 voffset = *(uint *)poffset;
460 cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
461 cmd_seq = (u8)((le32_to_cpu(voffset) >> 24) & 0x7f);
462 eid = (u8)((le32_to_cpu(voffset) >> 16) & 0xff);
463 r8712_event_handle(padapter, (uint *)poffset);
464 poffset += (cmd_len + 8);/*8 bytes aligment*/
465 } while (le32_to_cpu(voffset) & BIT(31));
466
467 }
468
469 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl,
470 u16 seq_num)
471 {
472 u8 wsize = preorder_ctrl->wsize_b;
473 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) % 4096;
474
475 /* Rx Reorder initialize condition.*/
476 if (preorder_ctrl->indicate_seq == 0xffff)
477 preorder_ctrl->indicate_seq = seq_num;
478 /* Drop out the packet which SeqNum is smaller than WinStart */
479 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
480 return false;
481 /*
482 * Sliding window manipulation. Conditions includes:
483 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
484 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
485 */
486 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq))
487 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq +
488 1) % 4096;
489 else if (SN_LESS(wend, seq_num)) {
490 if (seq_num >= (wsize - 1))
491 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
492 else
493 preorder_ctrl->indicate_seq = 4095 - (wsize -
494 (seq_num + 1)) + 1;
495 }
496 return true;
497 }
498
499 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
500 union recv_frame *prframe)
501 {
502 struct list_head *phead, *plist;
503 union recv_frame *pnextrframe;
504 struct rx_pkt_attrib *pnextattrib;
505 struct __queue *ppending_recvframe_queue =
506 &preorder_ctrl->pending_recvframe_queue;
507 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
508
509 phead = get_list_head(ppending_recvframe_queue);
510 plist = get_next(phead);
511 while (end_of_queue_search(phead, plist) == false) {
512 pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u);
513 pnextattrib = &pnextrframe->u.hdr.attrib;
514 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
515 plist = get_next(plist);
516 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
517 return false;
518 else
519 break;
520 }
521 list_delete(&(prframe->u.hdr.list));
522 list_insert_tail(&(prframe->u.hdr.list), plist);
523 return true;
524 }
525
526 int r8712_recv_indicatepkts_in_order(struct _adapter *padapter,
527 struct recv_reorder_ctrl *preorder_ctrl,
528 int bforced)
529 {
530 struct list_head *phead, *plist;
531 union recv_frame *prframe;
532 struct rx_pkt_attrib *pattrib;
533 int bPktInBuf = false;
534 struct recv_priv *precvpriv = &padapter->recvpriv;
535 struct __queue *ppending_recvframe_queue =
536 &preorder_ctrl->pending_recvframe_queue;
537
538 phead = get_list_head(ppending_recvframe_queue);
539 plist = get_next(phead);
540 /* Handling some condition for forced indicate case.*/
541 if (bforced == true) {
542 if (is_list_empty(phead))
543 return true;
544 else {
545 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
546 pattrib = &prframe->u.hdr.attrib;
547 preorder_ctrl->indicate_seq = pattrib->seq_num;
548 }
549 }
550 /* Prepare indication list and indication.
551 * Check if there is any packet need indicate. */
552 while (!is_list_empty(phead)) {
553 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
554 pattrib = &prframe->u.hdr.attrib;
555 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
556 plist = get_next(plist);
557 list_delete(&(prframe->u.hdr.list));
558 if (SN_EQUAL(preorder_ctrl->indicate_seq,
559 pattrib->seq_num))
560 preorder_ctrl->indicate_seq =
561 (preorder_ctrl->indicate_seq + 1) % 4096;
562 /*indicate this recv_frame*/
563 if (!pattrib->amsdu) {
564 if ((padapter->bDriverStopped == false) &&
565 (padapter->bSurpriseRemoved == false)) {
566 /* indicate this recv_frame */
567 r8712_recv_indicatepkt(padapter,
568 prframe);
569 }
570 } else if (pattrib->amsdu == 1) {
571 if (amsdu_to_msdu(padapter, prframe) !=
572 _SUCCESS)
573 r8712_free_recvframe(prframe,
574 &precvpriv->free_recv_queue);
575 }
576 /* Update local variables. */
577 bPktInBuf = false;
578 } else {
579 bPktInBuf = true;
580 break;
581 }
582 }
583 return bPktInBuf;
584 }
585
586 static int recv_indicatepkt_reorder(struct _adapter *padapter,
587 union recv_frame *prframe)
588 {
589 unsigned long irql;
590 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
591 struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
592 struct __queue *ppending_recvframe_queue =
593 &preorder_ctrl->pending_recvframe_queue;
594
595 if (!pattrib->amsdu) {
596 /* s1. */
597 r8712_wlanhdr_to_ethhdr(prframe);
598 if (pattrib->qos != 1) {
599 if ((padapter->bDriverStopped == false) &&
600 (padapter->bSurpriseRemoved == false)) {
601 r8712_recv_indicatepkt(padapter, prframe);
602 return _SUCCESS;
603 } else
604 return _FAIL;
605 }
606 }
607 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
608 /*s2. check if winstart_b(indicate_seq) needs to been updated*/
609 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num))
610 goto _err_exit;
611 /*s3. Insert all packet into Reorder Queue to maintain its ordering.*/
612 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
613 goto _err_exit;
614 /*s4.
615 * Indication process.
616 * After Packet dropping and Sliding Window shifting as above, we can
617 * now just indicate the packets with the SeqNum smaller than latest
618 * WinStart and buffer other packets.
619 *
620 * For Rx Reorder condition:
621 * 1. All packets with SeqNum smaller than WinStart => Indicate
622 * 2. All packets with SeqNum larger than or equal to
623 * WinStart => Buffer it.
624 */
625 if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false) ==
626 true) {
627 _set_timer(&preorder_ctrl->reordering_ctrl_timer,
628 REORDER_WAIT_TIME);
629 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
630 } else {
631 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
632 _cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
633 }
634 return _SUCCESS;
635 _err_exit:
636 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
637 return _FAIL;
638 }
639
640 void r8712_reordering_ctrl_timeout_handler(void *pcontext)
641 {
642 unsigned long irql;
643 struct recv_reorder_ctrl *preorder_ctrl =
644 (struct recv_reorder_ctrl *)pcontext;
645 struct _adapter *padapter = preorder_ctrl->padapter;
646 struct __queue *ppending_recvframe_queue =
647 &preorder_ctrl->pending_recvframe_queue;
648
649 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
650 return;
651 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
652 r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, true);
653 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
654 }
655
656 static int r8712_process_recv_indicatepkts(struct _adapter *padapter,
657 union recv_frame *prframe)
658 {
659 int retval = _SUCCESS;
660 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
661 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
662
663 if (phtpriv->ht_option == 1) { /*B/G/N Mode*/
664 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
665 /* including perform A-MPDU Rx Ordering Buffer Control*/
666 if ((padapter->bDriverStopped == false) &&
667 (padapter->bSurpriseRemoved == false))
668 return _FAIL;
669 }
670 } else { /*B/G mode*/
671 retval = r8712_wlanhdr_to_ethhdr(prframe);
672 if (retval != _SUCCESS)
673 return retval;
674 if ((padapter->bDriverStopped == false) &&
675 (padapter->bSurpriseRemoved == false)) {
676 /* indicate this recv_frame */
677 r8712_recv_indicatepkt(padapter, prframe);
678 } else
679 return _FAIL;
680 }
681 return retval;
682 }
683
684 static u8 query_rx_pwr_percentage(s8 antpower)
685 {
686 if ((antpower <= -100) || (antpower >= 20))
687 return 0;
688 else if (antpower >= 0)
689 return 100;
690 else
691 return 100 + antpower;
692 }
693
694 static u8 evm_db2percentage(s8 value)
695 {
696 /*
697 * -33dB~0dB to 0%~99%
698 */
699 s8 ret_val;
700
701 ret_val = value;
702 if (ret_val >= 0)
703 ret_val = 0;
704 if (ret_val <= -33)
705 ret_val = -33;
706 ret_val = -ret_val;
707 ret_val *= 3;
708 if (ret_val == 99)
709 ret_val = 100;
710 return ret_val;
711 }
712
713 s32 r8712_signal_scale_mapping(s32 cur_sig)
714 {
715 s32 ret_sig;
716
717 if (cur_sig >= 51 && cur_sig <= 100)
718 ret_sig = 100;
719 else if (cur_sig >= 41 && cur_sig <= 50)
720 ret_sig = 80 + ((cur_sig - 40) * 2);
721 else if (cur_sig >= 31 && cur_sig <= 40)
722 ret_sig = 66 + (cur_sig - 30);
723 else if (cur_sig >= 21 && cur_sig <= 30)
724 ret_sig = 54 + (cur_sig - 20);
725 else if (cur_sig >= 10 && cur_sig <= 20)
726 ret_sig = 42 + (((cur_sig - 10) * 2) / 3);
727 else if (cur_sig >= 5 && cur_sig <= 9)
728 ret_sig = 22 + (((cur_sig - 5) * 3) / 2);
729 else if (cur_sig >= 1 && cur_sig <= 4)
730 ret_sig = 6 + (((cur_sig - 1) * 3) / 2);
731 else
732 ret_sig = cur_sig;
733 return ret_sig;
734 }
735
736 static s32 translate2dbm(struct _adapter *padapter, u8 signal_strength_idx)
737 {
738 s32 signal_power; /* in dBm.*/
739 /* Translate to dBm (x=0.5y-95).*/
740 signal_power = (s32)((signal_strength_idx + 1) >> 1);
741 signal_power -= 95;
742 return signal_power;
743 }
744
745 static void query_rx_phy_status(struct _adapter *padapter,
746 union recv_frame *prframe)
747 {
748 u8 i, max_spatial_stream, evm;
749 struct recv_stat *prxstat = (struct recv_stat *)prframe->u.hdr.rx_head;
750 struct phy_stat *pphy_stat = (struct phy_stat *)(prxstat + 1);
751 u8 *pphy_head = (u8 *)(prxstat + 1);
752 s8 rx_pwr[4], rx_pwr_all;
753 u8 pwdb_all;
754 u32 rssi, total_rssi = 0;
755 u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0;
756 struct phy_cck_rx_status *pcck_buf;
757 u8 sq;
758
759 /* Record it for next packet processing*/
760 bcck_rate = (prframe->u.hdr.attrib.mcs_rate <= 3 ? 1 : 0);
761 if (bcck_rate) {
762 u8 report;
763
764 /* CCK Driver info Structure is not the same as OFDM packet.*/
765 pcck_buf = (struct phy_cck_rx_status *)pphy_stat;
766 /* (1)Hardware does not provide RSSI for CCK
767 * (2)PWDB, Average PWDB cacluated by hardware
768 * (for rate adaptive)
769 */
770 if (!cck_highpwr) {
771 report = pcck_buf->cck_agc_rpt & 0xc0;
772 report = report >> 6;
773 switch (report) {
774 /* Modify the RF RNA gain value to -40, -20,
775 * -2, 14 by Jenyu's suggestion
776 * Note: different RF with the different
777 * RNA gain. */
778 case 0x3:
779 rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
780 0x3e);
781 break;
782 case 0x2:
783 rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
784 0x3e);
785 break;
786 case 0x1:
787 rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
788 0x3e);
789 break;
790 case 0x0:
791 rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
792 0x3e);
793 break;
794 }
795 } else {
796 report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
797 0x60;
798 report = report >> 5;
799 switch (report) {
800 case 0x3:
801 rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
802 0x1f) << 1);
803 break;
804 case 0x2:
805 rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
806 0x1f) << 1);
807 break;
808 case 0x1:
809 rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
810 0x1f) << 1);
811 break;
812 case 0x0:
813 rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
814 0x1f) << 1);
815 break;
816 }
817 }
818 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
819 /* CCK gain is smaller than OFDM/MCS gain,*/
820 /* so we add gain diff by experiences, the val is 6 */
821 pwdb_all += 6;
822 if (pwdb_all > 100)
823 pwdb_all = 100;
824 /* modify the offset to make the same gain index with OFDM.*/
825 if (pwdb_all > 34 && pwdb_all <= 42)
826 pwdb_all -= 2;
827 else if (pwdb_all > 26 && pwdb_all <= 34)
828 pwdb_all -= 6;
829 else if (pwdb_all > 14 && pwdb_all <= 26)
830 pwdb_all -= 8;
831 else if (pwdb_all > 4 && pwdb_all <= 14)
832 pwdb_all -= 4;
833 /*
834 * (3) Get Signal Quality (EVM)
835 */
836 if (pwdb_all > 40)
837 sq = 100;
838 else {
839 sq = pcck_buf->sq_rpt;
840 if (pcck_buf->sq_rpt > 64)
841 sq = 0;
842 else if (pcck_buf->sq_rpt < 20)
843 sq = 100;
844 else
845 sq = ((64-sq) * 100) / 44;
846 }
847 prframe->u.hdr.attrib.signal_qual = sq;
848 prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq;
849 prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1;
850 } else {
851 /* (1)Get RSSI for HT rate */
852 for (i = 0; i < ((padapter->registrypriv.rf_config) &
853 0x0f) ; i++) {
854 rf_rx_num++;
855 rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i]
856 & 0x3F) * 2) - 110;
857 /* Translate DBM to percentage. */
858 rssi = query_rx_pwr_percentage(rx_pwr[i]);
859 total_rssi += rssi;
860 }
861 /* (2)PWDB, Average PWDB cacluated by hardware (for
862 * rate adaptive) */
863 rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f)
864 - 106;
865 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
866
867 {
868 /* (3)EVM of HT rate */
869 if (prframe->u.hdr.attrib.htc &&
870 prframe->u.hdr.attrib.mcs_rate >= 20 &&
871 prframe->u.hdr.attrib.mcs_rate <= 27) {
872 /* both spatial stream make sense */
873 max_spatial_stream = 2;
874 } else {
875 /* only spatial stream 1 makes sense */
876 max_spatial_stream = 1;
877 }
878 for (i = 0; i < max_spatial_stream; i++) {
879 evm = evm_db2percentage((pphy_head
880 [PHY_STAT_RXEVM_SHT + i]));/*dbm*/
881 prframe->u.hdr.attrib.signal_qual =
882 (u8)(evm & 0xff);
883 prframe->u.hdr.attrib.rx_mimo_signal_qual[i] =
884 (u8)(evm & 0xff);
885 }
886 }
887 }
888 /* UI BSS List signal strength(in percentage), make it good looking,
889 * from 0~100. It is assigned to the BSS List in
890 * GetValueFromBeaconOrProbeRsp(). */
891 if (bcck_rate)
892 prframe->u.hdr.attrib.signal_strength =
893 (u8)r8712_signal_scale_mapping(pwdb_all);
894 else {
895 if (rf_rx_num != 0)
896 prframe->u.hdr.attrib.signal_strength =
897 (u8)(r8712_signal_scale_mapping(total_rssi /=
898 rf_rx_num));
899 }
900 }
901
902 static void process_link_qual(struct _adapter *padapter,
903 union recv_frame *prframe)
904 {
905 u32 last_evm = 0, tmpVal;
906 struct rx_pkt_attrib *pattrib;
907
908 if (prframe == NULL || padapter == NULL)
909 return;
910 pattrib = &prframe->u.hdr.attrib;
911 if (pattrib->signal_qual != 0) {
912 /*
913 * 1. Record the general EVM to the sliding window.
914 */
915 if (padapter->recvpriv.signal_qual_data.total_num++ >=
916 PHY_LINKQUALITY_SLID_WIN_MAX) {
917 padapter->recvpriv.signal_qual_data.total_num =
918 PHY_LINKQUALITY_SLID_WIN_MAX;
919 last_evm = padapter->recvpriv.signal_qual_data.elements
920 [padapter->recvpriv.signal_qual_data.index];
921 padapter->recvpriv.signal_qual_data.total_val -=
922 last_evm;
923 }
924 padapter->recvpriv.signal_qual_data.total_val +=
925 pattrib->signal_qual;
926 padapter->recvpriv.signal_qual_data.elements[padapter->
927 recvpriv.signal_qual_data.index++] =
928 pattrib->signal_qual;
929 if (padapter->recvpriv.signal_qual_data.index >=
930 PHY_LINKQUALITY_SLID_WIN_MAX)
931 padapter->recvpriv.signal_qual_data.index = 0;
932
933 /* <1> Showed on UI for user, in percentage. */
934 tmpVal = padapter->recvpriv.signal_qual_data.total_val /
935 padapter->recvpriv.signal_qual_data.total_num;
936 padapter->recvpriv.signal = (u8)tmpVal;
937 }
938 }
939
940 static void process_rssi(struct _adapter *padapter, union recv_frame *prframe)
941 {
942 u32 last_rssi, tmp_val;
943 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
944
945 if (padapter->recvpriv.signal_strength_data.total_num++ >=
946 PHY_RSSI_SLID_WIN_MAX) {
947 padapter->recvpriv.signal_strength_data.total_num =
948 PHY_RSSI_SLID_WIN_MAX;
949 last_rssi = padapter->recvpriv.signal_strength_data.elements
950 [padapter->recvpriv.signal_strength_data.index];
951 padapter->recvpriv.signal_strength_data.total_val -= last_rssi;
952 }
953 padapter->recvpriv.signal_strength_data.total_val +=
954 pattrib->signal_strength;
955 padapter->recvpriv.signal_strength_data.elements[padapter->recvpriv.
956 signal_strength_data.index++] =
957 pattrib->signal_strength;
958 if (padapter->recvpriv.signal_strength_data.index >=
959 PHY_RSSI_SLID_WIN_MAX)
960 padapter->recvpriv.signal_strength_data.index = 0;
961 tmp_val = padapter->recvpriv.signal_strength_data.total_val /
962 padapter->recvpriv.signal_strength_data.total_num;
963 padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val);
964 }
965
966 static void process_phy_info(struct _adapter *padapter,
967 union recv_frame *prframe)
968 {
969 query_rx_phy_status(padapter, prframe);
970 process_rssi(padapter, prframe);
971 process_link_qual(padapter, prframe);
972 }
973
974 int recv_func(struct _adapter *padapter, void *pcontext)
975 {
976 struct rx_pkt_attrib *pattrib;
977 union recv_frame *prframe, *orig_prframe;
978 int retval = _SUCCESS;
979 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
980 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
981
982 prframe = (union recv_frame *)pcontext;
983 orig_prframe = prframe;
984 pattrib = &prframe->u.hdr.attrib;
985 if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) {
986 if (pattrib->crc_err == 1)
987 padapter->mppriv.rx_crcerrpktcount++;
988 else
989 padapter->mppriv.rx_pktcount++;
990 if (check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE) == false) {
991 /* free this recv_frame */
992 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
993 goto _exit_recv_func;
994 }
995 }
996 /* check the frame crtl field and decache */
997 retval = r8712_validate_recv_frame(padapter, prframe);
998 if (retval != _SUCCESS) {
999 /* free this recv_frame */
1000 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1001 goto _exit_recv_func;
1002 }
1003 process_phy_info(padapter, prframe);
1004 prframe = r8712_decryptor(padapter, prframe);
1005 if (prframe == NULL) {
1006 retval = _FAIL;
1007 goto _exit_recv_func;
1008 }
1009 prframe = r8712_recvframe_chk_defrag(padapter, prframe);
1010 if (prframe == NULL)
1011 goto _exit_recv_func;
1012 prframe = r8712_portctrl(padapter, prframe);
1013 if (prframe == NULL) {
1014 retval = _FAIL;
1015 goto _exit_recv_func;
1016 }
1017 retval = r8712_process_recv_indicatepkts(padapter, prframe);
1018 if (retval != _SUCCESS) {
1019 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1020 goto _exit_recv_func;
1021 }
1022 _exit_recv_func:
1023 return retval;
1024 }
1025
1026 static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
1027 {
1028 u8 *pbuf, shift_sz = 0;
1029 u8 frag, mf;
1030 uint pkt_len;
1031 u32 transfer_len;
1032 struct recv_stat *prxstat;
1033 u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz;
1034 struct __queue *pfree_recv_queue;
1035 _pkt *pkt_copy = NULL;
1036 union recv_frame *precvframe = NULL;
1037 struct recv_priv *precvpriv = &padapter->recvpriv;
1038
1039 pfree_recv_queue = &(precvpriv->free_recv_queue);
1040 pbuf = pskb->data;
1041 prxstat = (struct recv_stat *)pbuf;
1042 pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16)&0xff;
1043 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1044 transfer_len = pskb->len;
1045 /* Test throughput with Netgear 3700 (No security) with Chariot 3T3R
1046 * pairs. The packet count will be a big number so that the containing
1047 * packet will effect the Rx reordering. */
1048 if (transfer_len < pkt_len) {
1049 /* In this case, it means the MAX_RECVBUF_SZ is too small to
1050 * get the data from 8712u. */
1051 return _FAIL;
1052 }
1053 do {
1054 prxstat = (struct recv_stat *)pbuf;
1055 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1056 /* more fragment bit */
1057 mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1;
1058 /* ragmentation number */
1059 frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf;
1060 /* uint 2^3 = 8 bytes */
1061 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
1062 drvinfo_sz = drvinfo_sz<<3;
1063 if (pkt_len <= 0)
1064 goto _exit_recvbuf2recvframe;
1065 /* Qos data, wireless lan header length is 26 */
1066 if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
1067 shift_sz = 2;
1068 precvframe = r8712_alloc_recvframe(pfree_recv_queue);
1069 if (precvframe == NULL)
1070 goto _exit_recvbuf2recvframe;
1071 _init_listhead(&precvframe->u.hdr.list);
1072 precvframe->u.hdr.precvbuf = NULL; /*can't access the precvbuf*/
1073 precvframe->u.hdr.len = 0;
1074 tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE;
1075 pkt_offset = (u16)_RND128(tmp_len);
1076 /* for first fragment packet, driver need allocate 1536 +
1077 * drvinfo_sz + RXDESC_SIZE to defrag packet. */
1078 if ((mf == 1) && (frag == 0))
1079 alloc_sz = 1658;/*1658+6=1664, 1664 is 128 alignment.*/
1080 else
1081 alloc_sz = tmp_len;
1082 /* 2 is for IP header 4 bytes alignment in QoS packet case.
1083 * 4 is for skb->data 4 bytes alignment. */
1084 alloc_sz += 6;
1085 pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
1086 if (pkt_copy) {
1087 pkt_copy->dev = padapter->pnetdev;
1088 precvframe->u.hdr.pkt = pkt_copy;
1089 skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data)
1090 % 4));
1091 skb_reserve(pkt_copy, shift_sz);
1092 memcpy(pkt_copy->data, pbuf, tmp_len);
1093 precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data =
1094 precvframe->u.hdr.rx_tail = pkt_copy->data;
1095 precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
1096 } else {
1097 precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC);
1098 precvframe->u.hdr.rx_head = pbuf;
1099 precvframe->u.hdr.rx_data = pbuf;
1100 precvframe->u.hdr.rx_tail = pbuf;
1101 precvframe->u.hdr.rx_end = pbuf + alloc_sz;
1102 }
1103 recvframe_put(precvframe, tmp_len);
1104 recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
1105 /* because the endian issue, driver avoid reference to the
1106 * rxstat after calling update_recvframe_attrib_from_recvstat();
1107 */
1108 update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib,
1109 prxstat);
1110 r8712_recv_entry(precvframe);
1111 transfer_len -= pkt_offset;
1112 pbuf += pkt_offset;
1113 pkt_cnt--;
1114 precvframe = NULL;
1115 pkt_copy = NULL;
1116 } while ((transfer_len > 0) && pkt_cnt > 0);
1117 _exit_recvbuf2recvframe:
1118 return _SUCCESS;
1119 }
1120
1121 static void recv_tasklet(void *priv)
1122 {
1123 struct sk_buff *pskb;
1124 struct _adapter *padapter = (struct _adapter *)priv;
1125 struct recv_priv *precvpriv = &padapter->recvpriv;
1126
1127 while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
1128 recvbuf2recvframe(padapter, pskb);
1129 skb_reset_tail_pointer(pskb);
1130 pskb->len = 0;
1131 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
1132 }
1133 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree