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brcmfmac: use control channel in roamed status reporting
[deliverable/linux.git] / drivers / staging / rtl8712 / rtl8712_recv.c
CommitLineData
2865d42c
LF		 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
be9a1204 31#include <linux/if_ether.h>
20467825 32#include <linux/ip.h>
be9a1204 33
2865d42c
LF		 34#include "osdep_service.h"
35#include "drv_types.h"
36#include "recv_osdep.h"
37#include "mlme_osdep.h"
2865d42c
LF		 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) */
43static u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
44
45/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
46static u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
47
48static void recv_tasklet(void *priv);
49
50int 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
2865d42c
LF		 59 /*init recv_buf*/
60 _init_queue(&precvpriv->free_recv_buf_queue);
61 precvpriv->pallocated_recv_buf = _malloc(NR_RECVBUFF *
62 sizeof(struct recv_buf) + 4);
63 if (precvpriv->pallocated_recv_buf == NULL)
64 return _FAIL;
65 memset(precvpriv->pallocated_recv_buf, 0, NR_RECVBUFF *
66 sizeof(struct recv_buf) + 4);
67 precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 -
68 ((addr_t) (precvpriv->pallocated_recv_buf) & 3);
69 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
70 for (i = 0; i < NR_RECVBUFF; i++) {
71 _init_listhead(&precvbuf->list);
72 spin_lock_init(&precvbuf->recvbuf_lock);
73 res = r8712_os_recvbuf_resource_alloc(padapter, precvbuf);
74 if (res == _FAIL)
75 break;
76 precvbuf->ref_cnt = 0;
77 precvbuf->adapter = padapter;
78 list_insert_tail(&precvbuf->list,
79 &(precvpriv->free_recv_buf_queue.queue));
80 precvbuf++;
81 }
82 precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
83 tasklet_init(&precvpriv->recv_tasklet,
84 (void(*)(unsigned long))recv_tasklet,
85 (unsigned long)padapter);
86 skb_queue_head_init(&precvpriv->rx_skb_queue);
87
88 skb_queue_head_init(&precvpriv->free_recv_skb_queue);
89 for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
90 pskb = netdev_alloc_skb(padapter->pnetdev, MAX_RECVBUF_SZ +
91 RECVBUFF_ALIGN_SZ);
92 if (pskb) {
93 pskb->dev = padapter->pnetdev;
94 tmpaddr = (addr_t)pskb->data;
95 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
96 skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignment));
97 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
98 }
99 pskb = NULL;
100 }
101 return res;
102}
103
104void r8712_free_recv_priv(struct recv_priv *precvpriv)
105{
106 int i;
107 struct recv_buf *precvbuf;
108 struct _adapter *padapter = precvpriv->adapter;
109
110 precvbuf = (struct recv_buf *)precvpriv->precv_buf;
111 for (i = 0; i < NR_RECVBUFF ; i++) {
112 r8712_os_recvbuf_resource_free(padapter, precvbuf);
113 precvbuf++;
114 }
115 kfree(precvpriv->pallocated_recv_buf);
116 skb_queue_purge(&precvpriv->rx_skb_queue);
117 if (skb_queue_len(&precvpriv->rx_skb_queue))
118 printk(KERN_WARNING "r8712u: rx_skb_queue not empty\n");
119 skb_queue_purge(&precvpriv->free_recv_skb_queue);
120 if (skb_queue_len(&precvpriv->free_recv_skb_queue))
121 printk(KERN_WARNING "r8712u: free_recv_skb_queue not empty "
122 "%d\n", skb_queue_len(&precvpriv->free_recv_skb_queue));
123}
124
125int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf)
126{
127 int res = _SUCCESS;
128
129 precvbuf->transfer_len = 0;
130 precvbuf->len = 0;
131 precvbuf->ref_cnt = 0;
132 if (precvbuf->pbuf) {
133 precvbuf->pdata = precvbuf->pbuf;
134 precvbuf->phead = precvbuf->pbuf;
135 precvbuf->ptail = precvbuf->pbuf;
136 precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ;
137 }
138 return res;
139}
140
2865d42c
LF		 141int r8712_free_recvframe(union recv_frame *precvframe,
142 struct __queue *pfree_recv_queue)
143{
144 unsigned long irqL;
145 struct _adapter *padapter = precvframe->u.hdr.adapter;
146 struct recv_priv *precvpriv = &padapter->recvpriv;
147
148 if (precvframe->u.hdr.pkt) {
149 dev_kfree_skb_any(precvframe->u.hdr.pkt);/*free skb by driver*/
150 precvframe->u.hdr.pkt = NULL;
151 }
152 spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
153 list_delete(&(precvframe->u.hdr.list));
154 list_insert_tail(&(precvframe->u.hdr.list),
155 get_list_head(pfree_recv_queue));
156 if (padapter != NULL) {
157 if (pfree_recv_queue == &precvpriv->free_recv_queue)
158 precvpriv->free_recvframe_cnt++;
159 }
160 spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
161 return _SUCCESS;
162}
163
164static void update_recvframe_attrib_from_recvstat(struct rx_pkt_attrib *pattrib,
165 struct recv_stat *prxstat)
166{
167 u32 *pphy_info;
168 struct phy_stat *pphy_stat;
169 u16 drvinfo_sz = 0;
170
171 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0)&0x000f0000)>>16;
172 drvinfo_sz = drvinfo_sz<<3;
173 /*TODO:
174 * Offset 0 */
175 pattrib->bdecrypted = ((le32_to_cpu(prxstat->rxdw0) & BIT(27)) >> 27)
176 ? 0 : 1;
177 pattrib->crc_err = ((le32_to_cpu(prxstat->rxdw0) & BIT(14)) >> 14);
178 /*Offset 4*/
179 /*Offset 8*/
180 /*Offset 12*/
181 if (le32_to_cpu(prxstat->rxdw3) & BIT(13)) {
182 pattrib->tcpchk_valid = 1; /* valid */
183 if (le32_to_cpu(prxstat->rxdw3) & BIT(11))
184 pattrib->tcp_chkrpt = 1; /* correct */
185 else
186 pattrib->tcp_chkrpt = 0; /* incorrect */
187 if (le32_to_cpu(prxstat->rxdw3) & BIT(12))
188 pattrib->ip_chkrpt = 1; /* correct */
189 else
190 pattrib->ip_chkrpt = 0; /* incorrect */
191 } else
192 pattrib->tcpchk_valid = 0; /* invalid */
193 pattrib->mcs_rate = (u8)((le32_to_cpu(prxstat->rxdw3)) & 0x3f);
ee5b1aad 194 pattrib->htc = (u8)((le32_to_cpu(prxstat->rxdw3) >> 14) & 0x1);
2865d42c
LF		 195 /*Offset 16*/
196 /*Offset 20*/
197 /*phy_info*/
198 if (drvinfo_sz) {
199 pphy_stat = (struct phy_stat *)(prxstat+1);
200 pphy_info = (u32 *)prxstat+1;
201 }
202}
203
204/*perform defrag*/
16e53729 205static union recv_frame *recvframe_defrag(struct _adapter *adapter,
2865d42c
LF		 206 struct __queue *defrag_q)
207{
208 struct list_head *plist, *phead;
ee5b1aad 209 u8 *data, wlanhdr_offset;
2865d42c
LF		 210 u8 curfragnum;
211 struct recv_frame_hdr *pfhdr, *pnfhdr;
212 union recv_frame *prframe, *pnextrframe;
213 struct __queue *pfree_recv_queue;
214
215 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
216 phead = get_list_head(defrag_q);
217 plist = get_next(phead);
218 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
219 list_delete(&prframe->u.list);
220 pfhdr = &prframe->u.hdr;
221 curfragnum = 0;
222 if (curfragnum != pfhdr->attrib.frag_num) {
223 /*the first fragment number must be 0
224 *free the whole queue*/
225 r8712_free_recvframe(prframe, pfree_recv_queue);
ee5b1aad
AB		 226 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
227 return NULL;
2865d42c 228 }
ee5b1aad
AB		 229 curfragnum++;
230 plist = get_list_head(defrag_q);
231 plist = get_next(plist);
232 data = get_recvframe_data(prframe);
2865d42c
LF		 233 while (end_of_queue_search(phead, plist) == false) {
234 pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u);
2865d42c 235 pnfhdr = &pnextrframe->u.hdr;
ee5b1aad 236 /*check the fragment sequence (2nd ~n fragment frame) */
2865d42c
LF		 237 if (curfragnum != pnfhdr->attrib.frag_num) {
238 /* the fragment number must increase (after decache)
239 * release the defrag_q & prframe */
240 r8712_free_recvframe(prframe, pfree_recv_queue);
ee5b1aad
AB		 241 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
242 return NULL;
2865d42c 243 }
ee5b1aad 244 curfragnum++;
2865d42c
LF		 245 /* copy the 2nd~n fragment frame's payload to the first fragment
246 * get the 2nd~last fragment frame's payload */
247 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
248 recvframe_pull(pnextrframe, wlanhdr_offset);
249 /* append to first fragment frame's tail (if privacy frame,
250 * pull the ICV) */
251 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
252 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
253 recvframe_put(prframe, pnfhdr->len);
254 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
255 plist = get_next(plist);
b0b0fb0f 256 }
2865d42c
LF		 257 /* free the defrag_q queue and return the prframe */
258 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
259 return prframe;
260}
261
262/* check if need to defrag, if needed queue the frame to defrag_q */
263union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter,
264 union recv_frame *precv_frame)
265{
266 u8 ismfrag;
267 u8 fragnum;
268 u8 *psta_addr;
269 struct recv_frame_hdr *pfhdr;
270 struct sta_info *psta;
271 struct sta_priv *pstapriv ;
272 struct list_head *phead;
273 union recv_frame *prtnframe = NULL;
274 struct __queue *pfree_recv_queue, *pdefrag_q;
275
276 pstapriv = &padapter->stapriv;
277 pfhdr = &precv_frame->u.hdr;
278 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
279 /* need to define struct of wlan header frame ctrl */
280 ismfrag = pfhdr->attrib.mfrag;
281 fragnum = pfhdr->attrib.frag_num;
282 psta_addr = pfhdr->attrib.ta;
283 psta = r8712_get_stainfo(pstapriv, psta_addr);
284 if (psta == NULL)
285 pdefrag_q = NULL;
286 else
287 pdefrag_q = &psta->sta_recvpriv.defrag_q;
288
289 if ((ismfrag == 0) && (fragnum == 0))
290 prtnframe = precv_frame;/*isn't a fragment frame*/
291 if (ismfrag == 1) {
292 /* 0~(n-1) fragment frame
293 * enqueue to defraf_g */
294 if (pdefrag_q != NULL) {
295 if (fragnum == 0) {
296 /*the first fragment*/
297 if (_queue_empty(pdefrag_q) == false) {
298 /*free current defrag_q */
299 r8712_free_recvframe_queue(pdefrag_q,
300 pfree_recv_queue);
301 }
302 }
303 /* Then enqueue the 0~(n-1) fragment to the defrag_q */
304 phead = get_list_head(pdefrag_q);
305 list_insert_tail(&pfhdr->list, phead);
306 prtnframe = NULL;
307 } else {
308 /* can't find this ta's defrag_queue, so free this
309 * recv_frame */
310 r8712_free_recvframe(precv_frame, pfree_recv_queue);
311 prtnframe = NULL;
312 }
313
314 }
315 if ((ismfrag == 0) && (fragnum != 0)) {
316 /* the last fragment frame
317 * enqueue the last fragment */
318 if (pdefrag_q != NULL) {
319 phead = get_list_head(pdefrag_q);
320 list_insert_tail(&pfhdr->list, phead);
321 /*call recvframe_defrag to defrag*/
322 precv_frame = recvframe_defrag(padapter, pdefrag_q);
323 prtnframe = precv_frame;
324 } else {
325 /* can't find this ta's defrag_queue, so free this
326 * recv_frame */
327 r8712_free_recvframe(precv_frame, pfree_recv_queue);
328 prtnframe = NULL;
329 }
330 }
331 if ((prtnframe != NULL) && (prtnframe->u.hdr.attrib.privacy)) {
332 /* after defrag we must check tkip mic code */
333 if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) {
334 r8712_free_recvframe(prtnframe, pfree_recv_queue);
335 prtnframe = NULL;
336 }
337 }
338 return prtnframe;
339}
340
16e53729 341static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
2865d42c
LF		 342{
343 int a_len, padding_len;
344 u16 eth_type, nSubframe_Length;
345 u8 nr_subframes, i;
346 unsigned char *data_ptr, *pdata;
347 struct rx_pkt_attrib *pattrib;
348 _pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
349 struct recv_priv *precvpriv = &padapter->recvpriv;
350 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
351 int ret = _SUCCESS;
352
353 nr_subframes = 0;
354 pattrib = &prframe->u.hdr.attrib;
355 recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);
356 if (prframe->u.hdr.attrib.iv_len > 0)
357 recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);
358 a_len = prframe->u.hdr.len;
359 pdata = prframe->u.hdr.rx_data;
360 while (a_len > ETH_HLEN) {
361 /* Offset 12 denote 2 mac address */
362 nSubframe_Length = *((u16 *)(pdata + 12));
363 /*==m==>change the length order*/
364 nSubframe_Length = (nSubframe_Length >> 8) +
365 (nSubframe_Length << 8);
366 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
367 printk(KERN_WARNING "r8712u: nRemain_Length is %d and"
368 " nSubframe_Length is: %d\n",
369 a_len, nSubframe_Length);
370 goto exit;
371 }
372 /* move the data point to data content */
373 pdata += ETH_HLEN;
374 a_len -= ETH_HLEN;
375 /* Allocate new skb for releasing to upper layer */
376 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
5ca136a0
LF		 377 if (!sub_skb)
378 break;
2865d42c
LF		 379 skb_reserve(sub_skb, 12);
380 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
381 memcpy(data_ptr, pdata, nSubframe_Length);
382 subframes[nr_subframes++] = sub_skb;
383 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
384 printk(KERN_WARNING "r8712u: ParseSubframe(): Too"
385 " many Subframes! Packets dropped!\n");
386 break;
387 }
388 pdata += nSubframe_Length;
389 a_len -= nSubframe_Length;
390 if (a_len != 0) {
391 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3);
392 if (padding_len == 4)
393 padding_len = 0;
394 if (a_len < padding_len)
395 goto exit;
396 pdata += padding_len;
397 a_len -= padding_len;
398 }
399 }
400 for (i = 0; i < nr_subframes; i++) {
401 sub_skb = subframes[i];
402 /* convert hdr + possible LLC headers into Ethernet header */
403 eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7];
404 if (sub_skb->len >= 8 &&
405 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
406 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
407 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
408 /* remove RFC1042 or Bridge-Tunnel encapsulation and
409 * replace EtherType */
410 skb_pull(sub_skb, SNAP_SIZE);
411 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
412 ETH_ALEN);
413 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
414 ETH_ALEN);
415 } else {
416 u16 len;
417 /* Leave Ethernet header part of hdr and full payload */
418 len = htons(sub_skb->len);
419 memcpy(skb_push(sub_skb, 2), &len, 2);
420 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
421 ETH_ALEN);
422 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
423 ETH_ALEN);
424 }
425 /* Indicate the packets to upper layer */
426 if (sub_skb) {
427 sub_skb->protocol =
428 eth_type_trans(sub_skb, padapter->pnetdev);
429 sub_skb->dev = padapter->pnetdev;
430 if ((pattrib->tcpchk_valid == 1) &&
431 (pattrib->tcp_chkrpt == 1)) {
432 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
433 } else
434 sub_skb->ip_summed = CHECKSUM_NONE;
435 netif_rx(sub_skb);
436 }
437 }
438exit:
439 prframe->u.hdr.len = 0;
440 r8712_free_recvframe(prframe, pfree_recv_queue);
441 return ret;
442}
443
444void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
445{
446 uint voffset;
447 u8 *poffset;
448 u16 pkt_len, cmd_len, drvinfo_sz;
449 u8 eid, cmd_seq;
450 struct recv_stat *prxstat;
451
452 poffset = (u8 *)prxcmdbuf;
453 voffset = *(uint *)poffset;
454 pkt_len = le32_to_cpu(voffset) & 0x00003fff;
455 prxstat = (struct recv_stat *)prxcmdbuf;
456 drvinfo_sz = ((le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16);
457 drvinfo_sz = drvinfo_sz << 3;
458 poffset += RXDESC_SIZE + drvinfo_sz;
459 do {
460 voffset = *(uint *)poffset;
461 cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
462 cmd_seq = (u8)((le32_to_cpu(voffset) >> 24) & 0x7f);
463 eid = (u8)((le32_to_cpu(voffset) >> 16) & 0xff);
464 r8712_event_handle(padapter, (uint *)poffset);
be10ac2b 465 poffset += (cmd_len + 8);/*8 bytes alignment*/
2865d42c
LF		 466 } while (le32_to_cpu(voffset) & BIT(31));
467
468}
469
470static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl,
471 u16 seq_num)
472{
473 u8 wsize = preorder_ctrl->wsize_b;
474 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) % 4096;
475
476 /* Rx Reorder initialize condition.*/
477 if (preorder_ctrl->indicate_seq == 0xffff)
478 preorder_ctrl->indicate_seq = seq_num;
479 /* Drop out the packet which SeqNum is smaller than WinStart */
480 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
481 return false;
482 /*
483 * Sliding window manipulation. Conditions includes:
484 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
485 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
486 */
487 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq))
488 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq +
489 1) % 4096;
490 else if (SN_LESS(wend, seq_num)) {
491 if (seq_num >= (wsize - 1))
492 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
493 else
494 preorder_ctrl->indicate_seq = 4095 - (wsize -
495 (seq_num + 1)) + 1;
496 }
497 return true;
498}
499
500static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
501 union recv_frame *prframe)
502{
503 struct list_head *phead, *plist;
504 union recv_frame *pnextrframe;
505 struct rx_pkt_attrib *pnextattrib;
506 struct __queue *ppending_recvframe_queue =
507 &preorder_ctrl->pending_recvframe_queue;
508 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
509
510 phead = get_list_head(ppending_recvframe_queue);
511 plist = get_next(phead);
512 while (end_of_queue_search(phead, plist) == false) {
513 pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u);
514 pnextattrib = &pnextrframe->u.hdr.attrib;
515 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
516 plist = get_next(plist);
517 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
518 return false;
519 else
520 break;
521 }
522 list_delete(&(prframe->u.hdr.list));
523 list_insert_tail(&(prframe->u.hdr.list), plist);
524 return true;
525}
526
527int r8712_recv_indicatepkts_in_order(struct _adapter *padapter,
528 struct recv_reorder_ctrl *preorder_ctrl,
529 int bforced)
530{
531 struct list_head *phead, *plist;
532 union recv_frame *prframe;
533 struct rx_pkt_attrib *pattrib;
534 int bPktInBuf = false;
535 struct recv_priv *precvpriv = &padapter->recvpriv;
536 struct __queue *ppending_recvframe_queue =
537 &preorder_ctrl->pending_recvframe_queue;
538
539 phead = get_list_head(ppending_recvframe_queue);
540 plist = get_next(phead);
541 /* Handling some condition for forced indicate case.*/
542 if (bforced == true) {
543 if (is_list_empty(phead))
544 return true;
545 else {
546 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
547 pattrib = &prframe->u.hdr.attrib;
548 preorder_ctrl->indicate_seq = pattrib->seq_num;
549 }
550 }
551 /* Prepare indication list and indication.
552 * Check if there is any packet need indicate. */
553 while (!is_list_empty(phead)) {
554 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
555 pattrib = &prframe->u.hdr.attrib;
556 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
557 plist = get_next(plist);
558 list_delete(&(prframe->u.hdr.list));
559 if (SN_EQUAL(preorder_ctrl->indicate_seq,
560 pattrib->seq_num))
561 preorder_ctrl->indicate_seq =
562 (preorder_ctrl->indicate_seq + 1) % 4096;
563 /*indicate this recv_frame*/
564 if (!pattrib->amsdu) {
565 if ((padapter->bDriverStopped == false) &&
566 (padapter->bSurpriseRemoved == false)) {
567 /* indicate this recv_frame */
568 r8712_recv_indicatepkt(padapter,
569 prframe);
570 }
571 } else if (pattrib->amsdu == 1) {
572 if (amsdu_to_msdu(padapter, prframe) !=
573 _SUCCESS)
574 r8712_free_recvframe(prframe,
575 &precvpriv->free_recv_queue);
576 }
577 /* Update local variables. */
578 bPktInBuf = false;
579 } else {
580 bPktInBuf = true;
581 break;
582 }
583 }
584 return bPktInBuf;
585}
586
587static int recv_indicatepkt_reorder(struct _adapter *padapter,
588 union recv_frame *prframe)
589{
590 unsigned long irql;
591 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
592 struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
593 struct __queue *ppending_recvframe_queue =
594 &preorder_ctrl->pending_recvframe_queue;
595
596 if (!pattrib->amsdu) {
597 /* s1. */
598 r8712_wlanhdr_to_ethhdr(prframe);
599 if (pattrib->qos != 1) {
600 if ((padapter->bDriverStopped == false) &&
601 (padapter->bSurpriseRemoved == false)) {
602 r8712_recv_indicatepkt(padapter, prframe);
603 return _SUCCESS;
604 } else
605 return _FAIL;
606 }
607 }
608 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
be10ac2b 609 /*s2. check if winstart_b(indicate_seq) needs to be updated*/
2865d42c
LF		 610 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num))
611 goto _err_exit;
612 /*s3. Insert all packet into Reorder Queue to maintain its ordering.*/
613 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
614 goto _err_exit;
615 /*s4.
616 * Indication process.
617 * After Packet dropping and Sliding Window shifting as above, we can
618 * now just indicate the packets with the SeqNum smaller than latest
619 * WinStart and buffer other packets.
620 *
621 * For Rx Reorder condition:
622 * 1. All packets with SeqNum smaller than WinStart => Indicate
623 * 2. All packets with SeqNum larger than or equal to
624 * WinStart => Buffer it.
625 */
626 if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false) ==
627 true) {
628 _set_timer(&preorder_ctrl->reordering_ctrl_timer,
629 REORDER_WAIT_TIME);
630 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
631 } else {
632 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
633 _cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
634 }
635 return _SUCCESS;
636_err_exit:
637 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
638 return _FAIL;
639}
640
641void r8712_reordering_ctrl_timeout_handler(void *pcontext)
642{
643 unsigned long irql;
644 struct recv_reorder_ctrl *preorder_ctrl =
645 (struct recv_reorder_ctrl *)pcontext;
646 struct _adapter *padapter = preorder_ctrl->padapter;
647 struct __queue *ppending_recvframe_queue =
648 &preorder_ctrl->pending_recvframe_queue;
649
650 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
651 return;
652 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
653 r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, true);
654 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
655}
656
657static int r8712_process_recv_indicatepkts(struct _adapter *padapter,
658 union recv_frame *prframe)
659{
660 int retval = _SUCCESS;
661 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
662 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
663
664 if (phtpriv->ht_option == 1) { /*B/G/N Mode*/
665 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
666 /* including perform A-MPDU Rx Ordering Buffer Control*/
667 if ((padapter->bDriverStopped == false) &&
668 (padapter->bSurpriseRemoved == false))
669 return _FAIL;
670 }
671 } else { /*B/G mode*/
672 retval = r8712_wlanhdr_to_ethhdr(prframe);
673 if (retval != _SUCCESS)
674 return retval;
675 if ((padapter->bDriverStopped == false) &&
676 (padapter->bSurpriseRemoved == false)) {
677 /* indicate this recv_frame */
678 r8712_recv_indicatepkt(padapter, prframe);
679 } else
680 return _FAIL;
681 }
682 return retval;
683}
684
685static u8 query_rx_pwr_percentage(s8 antpower)
686{
687 if ((antpower <= -100) || (antpower >= 20))
688 return 0;
689 else if (antpower >= 0)
690 return 100;
691 else
692 return 100 + antpower;
693}
694
695static u8 evm_db2percentage(s8 value)
696{
697 /*
698 * -33dB~0dB to 0%~99%
699 */
700 s8 ret_val;
701
702 ret_val = value;
703 if (ret_val >= 0)
704 ret_val = 0;
705 if (ret_val <= -33)
706 ret_val = -33;
707 ret_val = -ret_val;
708 ret_val *= 3;
709 if (ret_val == 99)
710 ret_val = 100;
711 return ret_val;
712}
713
714s32 r8712_signal_scale_mapping(s32 cur_sig)
715{
716 s32 ret_sig;
717
718 if (cur_sig >= 51 && cur_sig <= 100)
719 ret_sig = 100;
720 else if (cur_sig >= 41 && cur_sig <= 50)
721 ret_sig = 80 + ((cur_sig - 40) * 2);
722 else if (cur_sig >= 31 && cur_sig <= 40)
723 ret_sig = 66 + (cur_sig - 30);
724 else if (cur_sig >= 21 && cur_sig <= 30)
725 ret_sig = 54 + (cur_sig - 20);
726 else if (cur_sig >= 10 && cur_sig <= 20)
727 ret_sig = 42 + (((cur_sig - 10) * 2) / 3);
728 else if (cur_sig >= 5 && cur_sig <= 9)
729 ret_sig = 22 + (((cur_sig - 5) * 3) / 2);
730 else if (cur_sig >= 1 && cur_sig <= 4)
731 ret_sig = 6 + (((cur_sig - 1) * 3) / 2);
732 else
733 ret_sig = cur_sig;
734 return ret_sig;
735}
736
737static s32 translate2dbm(struct _adapter *padapter, u8 signal_strength_idx)
738{
739 s32 signal_power; /* in dBm.*/
740 /* Translate to dBm (x=0.5y-95).*/
741 signal_power = (s32)((signal_strength_idx + 1) >> 1);
742 signal_power -= 95;
743 return signal_power;
744}
745
746static void query_rx_phy_status(struct _adapter *padapter,
747 union recv_frame *prframe)
748{
749 u8 i, max_spatial_stream, evm;
750 struct recv_stat *prxstat = (struct recv_stat *)prframe->u.hdr.rx_head;
751 struct phy_stat *pphy_stat = (struct phy_stat *)(prxstat + 1);
752 u8 *pphy_head = (u8 *)(prxstat + 1);
753 s8 rx_pwr[4], rx_pwr_all;
754 u8 pwdb_all;
755 u32 rssi, total_rssi = 0;
756 u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0;
757 struct phy_cck_rx_status *pcck_buf;
758 u8 sq;
759
760 /* Record it for next packet processing*/
761 bcck_rate = (prframe->u.hdr.attrib.mcs_rate <= 3 ? 1 : 0);
762 if (bcck_rate) {
763 u8 report;
764
765 /* CCK Driver info Structure is not the same as OFDM packet.*/
766 pcck_buf = (struct phy_cck_rx_status *)pphy_stat;
767 /* (1)Hardware does not provide RSSI for CCK
768 * (2)PWDB, Average PWDB cacluated by hardware
769 * (for rate adaptive)
770 */
771 if (!cck_highpwr) {
772 report = pcck_buf->cck_agc_rpt & 0xc0;
773 report = report >> 6;
774 switch (report) {
775 /* Modify the RF RNA gain value to -40, -20,
776 * -2, 14 by Jenyu's suggestion
777 * Note: different RF with the different
778 * RNA gain. */
779 case 0x3:
780 rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
781 0x3e);
782 break;
783 case 0x2:
784 rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
785 0x3e);
786 break;
787 case 0x1:
788 rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
789 0x3e);
790 break;
791 case 0x0:
792 rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
793 0x3e);
794 break;
795 }
796 } else {
797 report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
798 0x60;
799 report = report >> 5;
800 switch (report) {
801 case 0x3:
802 rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
803 0x1f) << 1);
804 break;
805 case 0x2:
806 rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
807 0x1f) << 1);
808 break;
809 case 0x1:
810 rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
811 0x1f) << 1);
812 break;
813 case 0x0:
814 rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
815 0x1f) << 1);
816 break;
817 }
818 }
819 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
820 /* CCK gain is smaller than OFDM/MCS gain,*/
821 /* so we add gain diff by experiences, the val is 6 */
822 pwdb_all += 6;
823 if (pwdb_all > 100)
824 pwdb_all = 100;
825 /* modify the offset to make the same gain index with OFDM.*/
826 if (pwdb_all > 34 && pwdb_all <= 42)
827 pwdb_all -= 2;
828 else if (pwdb_all > 26 && pwdb_all <= 34)
829 pwdb_all -= 6;
830 else if (pwdb_all > 14 && pwdb_all <= 26)
831 pwdb_all -= 8;
832 else if (pwdb_all > 4 && pwdb_all <= 14)
833 pwdb_all -= 4;
834 /*
835 * (3) Get Signal Quality (EVM)
836 */
837 if (pwdb_all > 40)
838 sq = 100;
839 else {
840 sq = pcck_buf->sq_rpt;
841 if (pcck_buf->sq_rpt > 64)
842 sq = 0;
843 else if (pcck_buf->sq_rpt < 20)
844 sq = 100;
845 else
846 sq = ((64-sq) * 100) / 44;
847 }
848 prframe->u.hdr.attrib.signal_qual = sq;
849 prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq;
850 prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1;
851 } else {
852 /* (1)Get RSSI for HT rate */
853 for (i = 0; i < ((padapter->registrypriv.rf_config) &
854 0x0f) ; i++) {
855 rf_rx_num++;
856 rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i]
857 & 0x3F) * 2) - 110;
858 /* Translate DBM to percentage. */
859 rssi = query_rx_pwr_percentage(rx_pwr[i]);
860 total_rssi += rssi;
861 }
862 /* (2)PWDB, Average PWDB cacluated by hardware (for
863 * rate adaptive) */
864 rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f)
865 - 106;
866 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
867
868 {
869 /* (3)EVM of HT rate */
870 if (prframe->u.hdr.attrib.htc &&
871 prframe->u.hdr.attrib.mcs_rate >= 20 &&
872 prframe->u.hdr.attrib.mcs_rate <= 27) {
873 /* both spatial stream make sense */
874 max_spatial_stream = 2;
875 } else {
876 /* only spatial stream 1 makes sense */
877 max_spatial_stream = 1;
878 }
879 for (i = 0; i < max_spatial_stream; i++) {
880 evm = evm_db2percentage((pphy_head
881 [PHY_STAT_RXEVM_SHT + i]));/*dbm*/
882 prframe->u.hdr.attrib.signal_qual =
883 (u8)(evm & 0xff);
884 prframe->u.hdr.attrib.rx_mimo_signal_qual[i] =
885 (u8)(evm & 0xff);
886 }
887 }
888 }
889 /* UI BSS List signal strength(in percentage), make it good looking,
890 * from 0~100. It is assigned to the BSS List in
891 * GetValueFromBeaconOrProbeRsp(). */
892 if (bcck_rate)
893 prframe->u.hdr.attrib.signal_strength =
894 (u8)r8712_signal_scale_mapping(pwdb_all);
895 else {
896 if (rf_rx_num != 0)
897 prframe->u.hdr.attrib.signal_strength =
898 (u8)(r8712_signal_scale_mapping(total_rssi /=
899 rf_rx_num));
900 }
901}
902
903static void process_link_qual(struct _adapter *padapter,
904 union recv_frame *prframe)
905{
906 u32 last_evm = 0, tmpVal;
907 struct rx_pkt_attrib *pattrib;
908
909 if (prframe == NULL || padapter == NULL)
910 return;
911 pattrib = &prframe->u.hdr.attrib;
912 if (pattrib->signal_qual != 0) {
913 /*
914 * 1. Record the general EVM to the sliding window.
915 */
916 if (padapter->recvpriv.signal_qual_data.total_num++ >=
917 PHY_LINKQUALITY_SLID_WIN_MAX) {
918 padapter->recvpriv.signal_qual_data.total_num =
919 PHY_LINKQUALITY_SLID_WIN_MAX;
920 last_evm = padapter->recvpriv.signal_qual_data.elements
921 [padapter->recvpriv.signal_qual_data.index];
922 padapter->recvpriv.signal_qual_data.total_val -=
923 last_evm;
924 }
925 padapter->recvpriv.signal_qual_data.total_val +=
926 pattrib->signal_qual;
927 padapter->recvpriv.signal_qual_data.elements[padapter->
928 recvpriv.signal_qual_data.index++] =
929 pattrib->signal_qual;
930 if (padapter->recvpriv.signal_qual_data.index >=
931 PHY_LINKQUALITY_SLID_WIN_MAX)
932 padapter->recvpriv.signal_qual_data.index = 0;
933
934 /* <1> Showed on UI for user, in percentage. */
935 tmpVal = padapter->recvpriv.signal_qual_data.total_val /
936 padapter->recvpriv.signal_qual_data.total_num;
937 padapter->recvpriv.signal = (u8)tmpVal;
938 }
939}
940
941static void process_rssi(struct _adapter *padapter, union recv_frame *prframe)
942{
943 u32 last_rssi, tmp_val;
944 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
945
946 if (padapter->recvpriv.signal_strength_data.total_num++ >=
947 PHY_RSSI_SLID_WIN_MAX) {
948 padapter->recvpriv.signal_strength_data.total_num =
949 PHY_RSSI_SLID_WIN_MAX;
950 last_rssi = padapter->recvpriv.signal_strength_data.elements
951 [padapter->recvpriv.signal_strength_data.index];
952 padapter->recvpriv.signal_strength_data.total_val -= last_rssi;
953 }
954 padapter->recvpriv.signal_strength_data.total_val +=
955 pattrib->signal_strength;
956 padapter->recvpriv.signal_strength_data.elements[padapter->recvpriv.
957 signal_strength_data.index++] =
958 pattrib->signal_strength;
959 if (padapter->recvpriv.signal_strength_data.index >=
960 PHY_RSSI_SLID_WIN_MAX)
961 padapter->recvpriv.signal_strength_data.index = 0;
962 tmp_val = padapter->recvpriv.signal_strength_data.total_val /
963 padapter->recvpriv.signal_strength_data.total_num;
964 padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val);
965}
966
967static void process_phy_info(struct _adapter *padapter,
968 union recv_frame *prframe)
969{
970 query_rx_phy_status(padapter, prframe);
971 process_rssi(padapter, prframe);
972 process_link_qual(padapter, prframe);
973}
974
975int recv_func(struct _adapter *padapter, void *pcontext)
976{
977 struct rx_pkt_attrib *pattrib;
978 union recv_frame *prframe, *orig_prframe;
979 int retval = _SUCCESS;
980 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
981 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
982
983 prframe = (union recv_frame *)pcontext;
984 orig_prframe = prframe;
985 pattrib = &prframe->u.hdr.attrib;
986 if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) {
987 if (pattrib->crc_err == 1)
988 padapter->mppriv.rx_crcerrpktcount++;
989 else
990 padapter->mppriv.rx_pktcount++;
991 if (check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE) == false) {
992 /* free this recv_frame */
993 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
994 goto _exit_recv_func;
995 }
996 }
997 /* check the frame crtl field and decache */
998 retval = r8712_validate_recv_frame(padapter, prframe);
999 if (retval != _SUCCESS) {
1000 /* free this recv_frame */
1001 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1002 goto _exit_recv_func;
1003 }
1004 process_phy_info(padapter, prframe);
1005 prframe = r8712_decryptor(padapter, prframe);
1006 if (prframe == NULL) {
1007 retval = _FAIL;
1008 goto _exit_recv_func;
1009 }
1010 prframe = r8712_recvframe_chk_defrag(padapter, prframe);
1011 if (prframe == NULL)
1012 goto _exit_recv_func;
1013 prframe = r8712_portctrl(padapter, prframe);
1014 if (prframe == NULL) {
1015 retval = _FAIL;
1016 goto _exit_recv_func;
1017 }
1018 retval = r8712_process_recv_indicatepkts(padapter, prframe);
1019 if (retval != _SUCCESS) {
1020 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1021 goto _exit_recv_func;
1022 }
1023_exit_recv_func:
1024 return retval;
1025}
1026
1027static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
1028{
1029 u8 *pbuf, shift_sz = 0;
1030 u8 frag, mf;
1031 uint pkt_len;
1032 u32 transfer_len;
1033 struct recv_stat *prxstat;
1034 u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz;
1035 struct __queue *pfree_recv_queue;
1036 _pkt *pkt_copy = NULL;
1037 union recv_frame *precvframe = NULL;
1038 struct recv_priv *precvpriv = &padapter->recvpriv;
1039
1040 pfree_recv_queue = &(precvpriv->free_recv_queue);
1041 pbuf = pskb->data;
1042 prxstat = (struct recv_stat *)pbuf;
1043 pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16)&0xff;
1044 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1045 transfer_len = pskb->len;
1046 /* Test throughput with Netgear 3700 (No security) with Chariot 3T3R
1047 * pairs. The packet count will be a big number so that the containing
1048 * packet will effect the Rx reordering. */
1049 if (transfer_len < pkt_len) {
1050 /* In this case, it means the MAX_RECVBUF_SZ is too small to
1051 * get the data from 8712u. */
1052 return _FAIL;
1053 }
1054 do {
1055 prxstat = (struct recv_stat *)pbuf;
1056 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1057 /* more fragment bit */
1058 mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1;
1059 /* ragmentation number */
1060 frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf;
1061 /* uint 2^3 = 8 bytes */
1062 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
1063 drvinfo_sz = drvinfo_sz<<3;
1064 if (pkt_len <= 0)
1065 goto _exit_recvbuf2recvframe;
1066 /* Qos data, wireless lan header length is 26 */
1067 if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
1068 shift_sz = 2;
1069 precvframe = r8712_alloc_recvframe(pfree_recv_queue);
1070 if (precvframe == NULL)
1071 goto _exit_recvbuf2recvframe;
1072 _init_listhead(&precvframe->u.hdr.list);
1073 precvframe->u.hdr.precvbuf = NULL; /*can't access the precvbuf*/
1074 precvframe->u.hdr.len = 0;
1075 tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE;
1076 pkt_offset = (u16)_RND128(tmp_len);
1077 /* for first fragment packet, driver need allocate 1536 +
1078 * drvinfo_sz + RXDESC_SIZE to defrag packet. */
1079 if ((mf == 1) && (frag == 0))
ee5b1aad 1080 alloc_sz = 1658;/*1658+6=1664, 1664 is 128 alignment.*/
2865d42c
LF		 1081 else
1082 alloc_sz = tmp_len;
1083 /* 2 is for IP header 4 bytes alignment in QoS packet case.
1084 * 4 is for skb->data 4 bytes alignment. */
1085 alloc_sz += 6;
1086 pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
1087 if (pkt_copy) {
1088 pkt_copy->dev = padapter->pnetdev;
1089 precvframe->u.hdr.pkt = pkt_copy;
1090 skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data)
1091 % 4));
1092 skb_reserve(pkt_copy, shift_sz);
1093 memcpy(pkt_copy->data, pbuf, tmp_len);
1094 precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data =
1095 precvframe->u.hdr.rx_tail = pkt_copy->data;
1096 precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
1097 } else {
1098 precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC);
5ca136a0
LF		 1099 if (!precvframe->u.hdr.pkt)
1100 return _FAIL;
2865d42c
LF		 1101 precvframe->u.hdr.rx_head = pbuf;
1102 precvframe->u.hdr.rx_data = pbuf;
1103 precvframe->u.hdr.rx_tail = pbuf;
1104 precvframe->u.hdr.rx_end = pbuf + alloc_sz;
1105 }
1106 recvframe_put(precvframe, tmp_len);
1107 recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
1108 /* because the endian issue, driver avoid reference to the
1109 * rxstat after calling update_recvframe_attrib_from_recvstat();
1110 */
1111 update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib,
1112 prxstat);
1113 r8712_recv_entry(precvframe);
1114 transfer_len -= pkt_offset;
1115 pbuf += pkt_offset;
1116 pkt_cnt--;
1117 precvframe = NULL;
1118 pkt_copy = NULL;
1119 } while ((transfer_len > 0) && pkt_cnt > 0);
1120_exit_recvbuf2recvframe:
1121 return _SUCCESS;
1122}
1123
1124static void recv_tasklet(void *priv)
1125{
1126 struct sk_buff *pskb;
1127 struct _adapter *padapter = (struct _adapter *)priv;
1128 struct recv_priv *precvpriv = &padapter->recvpriv;
1129
1130 while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
1131 recvbuf2recvframe(padapter, pskb);
1132 skb_reset_tail_pointer(pskb);
1133 pskb->len = 0;
fa16e5ea
LF		 1134 if (!skb_cloned(pskb))
1135 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
1136 else
1137 consume_skb(pskb);
2865d42c
LF		 1138 }
1139}
Linux kernel - Deliverables
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