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 = kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4,
62 GFP_ATOMIC);
63 if (precvpriv->pallocated_recv_buf == NULL)
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 u32 *pphy_info;
162 struct phy_stat *pphy_stat;
163 u16 drvinfo_sz = 0;
164
165 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0)&0x000f0000)>>16;
166 drvinfo_sz = drvinfo_sz<<3;
167 /*TODO:
168 * Offset 0 */
169 pattrib->bdecrypted = ((le32_to_cpu(prxstat->rxdw0) & BIT(27)) >> 27)
170 ? 0 : 1;
171 pattrib->crc_err = ((le32_to_cpu(prxstat->rxdw0) & BIT(14)) >> 14);
172 /*Offset 4*/
173 /*Offset 8*/
174 /*Offset 12*/
175 if (le32_to_cpu(prxstat->rxdw3) & BIT(13)) {
176 pattrib->tcpchk_valid = 1; /* valid */
177 if (le32_to_cpu(prxstat->rxdw3) & BIT(11))
178 pattrib->tcp_chkrpt = 1; /* correct */
179 else
180 pattrib->tcp_chkrpt = 0; /* incorrect */
181 if (le32_to_cpu(prxstat->rxdw3) & BIT(12))
182 pattrib->ip_chkrpt = 1; /* correct */
183 else
184 pattrib->ip_chkrpt = 0; /* incorrect */
185 } else
186 pattrib->tcpchk_valid = 0; /* invalid */
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 if (drvinfo_sz) {
193 pphy_stat = (struct phy_stat *)(prxstat+1);
194 pphy_info = (u32 *)prxstat+1;
195 }
196 }
197
198 /*perform defrag*/
recvframe_defrag(struct _adapter * adapter,struct __queue * defrag_q)199 static union recv_frame *recvframe_defrag(struct _adapter *adapter,
200 struct __queue *defrag_q)
201 {
202 struct list_head *plist, *phead;
203 u8 *data, wlanhdr_offset;
204 u8 curfragnum;
205 struct recv_frame_hdr *pfhdr, *pnfhdr;
206 union recv_frame *prframe, *pnextrframe;
207 struct __queue *pfree_recv_queue;
208
209 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
210 phead = &defrag_q->queue;
211 plist = phead->next;
212 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
213 list_del_init(&prframe->u.list);
214 pfhdr = &prframe->u.hdr;
215 curfragnum = 0;
216 if (curfragnum != pfhdr->attrib.frag_num) {
217 /*the first fragment number must be 0
218 *free the whole queue*/
219 r8712_free_recvframe(prframe, pfree_recv_queue);
220 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
221 return NULL;
222 }
223 curfragnum++;
224 plist = &defrag_q->queue;
225 plist = plist->next;
226 data = get_recvframe_data(prframe);
227 while (end_of_queue_search(phead, plist) == false) {
228 pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u);
229 pnfhdr = &pnextrframe->u.hdr;
230 /*check the fragment sequence (2nd ~n fragment frame) */
231 if (curfragnum != pnfhdr->attrib.frag_num) {
232 /* the fragment number must increase (after decache)
233 * release the defrag_q & prframe */
234 r8712_free_recvframe(prframe, pfree_recv_queue);
235 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
236 return NULL;
237 }
238 curfragnum++;
239 /* copy the 2nd~n fragment frame's payload to the first fragment
240 * get the 2nd~last fragment frame's payload */
241 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
242 recvframe_pull(pnextrframe, wlanhdr_offset);
243 /* append to first fragment frame's tail (if privacy frame,
244 * pull the ICV) */
245 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
246 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
247 recvframe_put(prframe, pnfhdr->len);
248 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
249 plist = plist->next;
250 }
251 /* free the defrag_q queue and return the prframe */
252 r8712_free_recvframe_queue(defrag_q, pfree_recv_queue);
253 return prframe;
254 }
255
256 /* 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)257 union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter,
258 union recv_frame *precv_frame)
259 {
260 u8 ismfrag;
261 u8 fragnum;
262 u8 *psta_addr;
263 struct recv_frame_hdr *pfhdr;
264 struct sta_info *psta;
265 struct sta_priv *pstapriv;
266 struct list_head *phead;
267 union recv_frame *prtnframe = NULL;
268 struct __queue *pfree_recv_queue, *pdefrag_q;
269
270 pstapriv = &padapter->stapriv;
271 pfhdr = &precv_frame->u.hdr;
272 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
273 /* need to define struct of wlan header frame ctrl */
274 ismfrag = pfhdr->attrib.mfrag;
275 fragnum = pfhdr->attrib.frag_num;
276 psta_addr = pfhdr->attrib.ta;
277 psta = r8712_get_stainfo(pstapriv, psta_addr);
278 if (psta == NULL)
279 pdefrag_q = NULL;
280 else
281 pdefrag_q = &psta->sta_recvpriv.defrag_q;
282
283 if ((ismfrag == 0) && (fragnum == 0))
284 prtnframe = precv_frame;/*isn't a fragment frame*/
285 if (ismfrag == 1) {
286 /* 0~(n-1) fragment frame
287 * enqueue to defraf_g */
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 r8712_free_recvframe(precv_frame, pfree_recv_queue);
305 prtnframe = NULL;
306 }
307
308 }
309 if ((ismfrag == 0) && (fragnum != 0)) {
310 /* the last fragment frame
311 * enqueue the last fragment */
312 if (pdefrag_q != NULL) {
313 phead = &pdefrag_q->queue;
314 list_add_tail(&pfhdr->list, phead);
315 /*call recvframe_defrag to defrag*/
316 precv_frame = recvframe_defrag(padapter, pdefrag_q);
317 prtnframe = precv_frame;
318 } else {
319 /* can't find this ta's defrag_queue, so free this
320 * recv_frame */
321 r8712_free_recvframe(precv_frame, pfree_recv_queue);
322 prtnframe = NULL;
323 }
324 }
325 if ((prtnframe != NULL) && (prtnframe->u.hdr.attrib.privacy)) {
326 /* after defrag we must check tkip mic code */
327 if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) {
328 r8712_free_recvframe(prtnframe, pfree_recv_queue);
329 prtnframe = NULL;
330 }
331 }
332 return prtnframe;
333 }
334
amsdu_to_msdu(struct _adapter * padapter,union recv_frame * prframe)335 static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe)
336 {
337 int a_len, padding_len;
338 u16 eth_type, nSubframe_Length;
339 u8 nr_subframes, i;
340 unsigned char *data_ptr, *pdata;
341 struct rx_pkt_attrib *pattrib;
342 _pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
343 struct recv_priv *precvpriv = &padapter->recvpriv;
344 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
345
346 nr_subframes = 0;
347 pattrib = &prframe->u.hdr.attrib;
348 recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);
349 if (prframe->u.hdr.attrib.iv_len > 0)
350 recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);
351 a_len = prframe->u.hdr.len;
352 pdata = prframe->u.hdr.rx_data;
353 while (a_len > ETH_HLEN) {
354 /* Offset 12 denote 2 mac address */
355 nSubframe_Length = *((u16 *)(pdata + 12));
356 /*==m==>change the length order*/
357 nSubframe_Length = (nSubframe_Length >> 8) +
358 (nSubframe_Length << 8);
359 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
360 netdev_warn(padapter->pnetdev, "r8712u: nRemain_Length is %d and nSubframe_Length is: %d\n",
361 a_len, nSubframe_Length);
362 goto exit;
363 }
364 /* move the data point to data content */
365 pdata += ETH_HLEN;
366 a_len -= ETH_HLEN;
367 /* Allocate new skb for releasing to upper layer */
368 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
369 if (!sub_skb)
370 break;
371 skb_reserve(sub_skb, 12);
372 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
373 memcpy(data_ptr, pdata, nSubframe_Length);
374 subframes[nr_subframes++] = sub_skb;
375 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
376 netdev_warn(padapter->pnetdev, "r8712u: ParseSubframe(): Too many Subframes! Packets dropped!\n");
377 break;
378 }
379 pdata += nSubframe_Length;
380 a_len -= nSubframe_Length;
381 if (a_len != 0) {
382 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3);
383 if (padding_len == 4)
384 padding_len = 0;
385 if (a_len < padding_len)
386 goto exit;
387 pdata += padding_len;
388 a_len -= padding_len;
389 }
390 }
391 for (i = 0; i < nr_subframes; i++) {
392 sub_skb = subframes[i];
393 /* convert hdr + possible LLC headers into Ethernet header */
394 eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7];
395 if (sub_skb->len >= 8 &&
396 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
397 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
398 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
399 /* remove RFC1042 or Bridge-Tunnel encapsulation and
400 * replace EtherType */
401 skb_pull(sub_skb, SNAP_SIZE);
402 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
403 ETH_ALEN);
404 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
405 ETH_ALEN);
406 } else {
407 u16 len;
408 /* Leave Ethernet header part of hdr and full payload */
409 len = htons(sub_skb->len);
410 memcpy(skb_push(sub_skb, 2), &len, 2);
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 }
416 /* Indicate the packets to upper layer */
417 if (sub_skb) {
418 sub_skb->protocol =
419 eth_type_trans(sub_skb, padapter->pnetdev);
420 sub_skb->dev = padapter->pnetdev;
421 if ((pattrib->tcpchk_valid == 1) &&
422 (pattrib->tcp_chkrpt == 1)) {
423 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
424 } else
425 sub_skb->ip_summed = CHECKSUM_NONE;
426 netif_rx(sub_skb);
427 }
428 }
429 exit:
430 prframe->u.hdr.len = 0;
431 r8712_free_recvframe(prframe, pfree_recv_queue);
432 return _SUCCESS;
433 }
434
r8712_rxcmd_event_hdl(struct _adapter * padapter,void * prxcmdbuf)435 void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
436 {
437 uint voffset;
438 u8 *poffset;
439 u16 pkt_len, cmd_len, drvinfo_sz;
440 u8 eid, cmd_seq;
441 struct recv_stat *prxstat;
442
443 poffset = (u8 *)prxcmdbuf;
444 voffset = *(uint *)poffset;
445 pkt_len = le32_to_cpu(voffset) & 0x00003fff;
446 prxstat = (struct recv_stat *)prxcmdbuf;
447 drvinfo_sz = ((le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16);
448 drvinfo_sz = drvinfo_sz << 3;
449 poffset += RXDESC_SIZE + drvinfo_sz;
450 do {
451 voffset = *(uint *)poffset;
452 cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
453 cmd_seq = (u8)((le32_to_cpu(voffset) >> 24) & 0x7f);
454 eid = (u8)((le32_to_cpu(voffset) >> 16) & 0xff);
455 r8712_event_handle(padapter, (uint *)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) == false) {
504 pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u);
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 == true) {
534 if (list_empty(phead))
535 return true;
536 else {
537 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
538 pattrib = &prframe->u.hdr.attrib;
539 preorder_ctrl->indicate_seq = pattrib->seq_num;
540 }
541 }
542 /* Prepare indication list and indication.
543 * Check if there is any packet need indicate. */
544 while (!list_empty(phead)) {
545 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
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 == false) &&
557 (padapter->bSurpriseRemoved == false)) {
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 == false) &&
592 (padapter->bSurpriseRemoved == false)) {
593 r8712_recv_indicatepkt(padapter, prframe);
594 return _SUCCESS;
595 } else
596 return _FAIL;
597 }
598 }
599 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
600 /*s2. check if winstart_b(indicate_seq) needs to be updated*/
601 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num))
602 goto _err_exit;
603 /*s3. Insert all packet into Reorder Queue to maintain its ordering.*/
604 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
605 goto _err_exit;
606 /*s4.
607 * Indication process.
608 * After Packet dropping and Sliding Window shifting as above, we can
609 * now just indicate the packets with the SeqNum smaller than latest
610 * WinStart and buffer other packets.
611 *
612 * For Rx Reorder condition:
613 * 1. All packets with SeqNum smaller than WinStart => Indicate
614 * 2. All packets with SeqNum larger than or equal to
615 * WinStart => Buffer it.
616 */
617 if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false) ==
618 true) {
619 _set_timer(&preorder_ctrl->reordering_ctrl_timer,
620 REORDER_WAIT_TIME);
621 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
622 } else {
623 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
624 _cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
625 }
626 return _SUCCESS;
627 _err_exit:
628 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
629 return _FAIL;
630 }
631
r8712_reordering_ctrl_timeout_handler(void * pcontext)632 void r8712_reordering_ctrl_timeout_handler(void *pcontext)
633 {
634 unsigned long irql;
635 struct recv_reorder_ctrl *preorder_ctrl =
636 (struct recv_reorder_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 == false) &&
659 (padapter->bSurpriseRemoved == false))
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 == false) &&
667 (padapter->bSurpriseRemoved == false)) {
668 /* indicate this recv_frame */
669 r8712_recv_indicatepkt(padapter, prframe);
670 } else
671 return _FAIL;
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 cacluated by hardware
760 * (for rate adaptive)
761 */
762 if (!cck_highpwr) {
763 report = pcck_buf->cck_agc_rpt & 0xc0;
764 report = 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 case 0x3:
771 rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
772 0x3e);
773 break;
774 case 0x2:
775 rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
776 0x3e);
777 break;
778 case 0x1:
779 rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
780 0x3e);
781 break;
782 case 0x0:
783 rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
784 0x3e);
785 break;
786 }
787 } else {
788 report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
789 0x60;
790 report = report >> 5;
791 switch (report) {
792 case 0x3:
793 rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
794 0x1f) << 1);
795 break;
796 case 0x2:
797 rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
798 0x1f) << 1);
799 break;
800 case 0x1:
801 rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
802 0x1f) << 1);
803 break;
804 case 0x0:
805 rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
806 0x1f) << 1);
807 break;
808 }
809 }
810 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
811 /* CCK gain is smaller than OFDM/MCS gain,*/
812 /* so we add gain diff by experiences, the val is 6 */
813 pwdb_all += 6;
814 if (pwdb_all > 100)
815 pwdb_all = 100;
816 /* modify the offset to make the same gain index with OFDM.*/
817 if (pwdb_all > 34 && pwdb_all <= 42)
818 pwdb_all -= 2;
819 else if (pwdb_all > 26 && pwdb_all <= 34)
820 pwdb_all -= 6;
821 else if (pwdb_all > 14 && pwdb_all <= 26)
822 pwdb_all -= 8;
823 else if (pwdb_all > 4 && pwdb_all <= 14)
824 pwdb_all -= 4;
825 /*
826 * (3) Get Signal Quality (EVM)
827 */
828 if (pwdb_all > 40)
829 sq = 100;
830 else {
831 sq = pcck_buf->sq_rpt;
832 if (pcck_buf->sq_rpt > 64)
833 sq = 0;
834 else if (pcck_buf->sq_rpt < 20)
835 sq = 100;
836 else
837 sq = ((64-sq) * 100) / 44;
838 }
839 prframe->u.hdr.attrib.signal_qual = sq;
840 prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq;
841 prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1;
842 } else {
843 /* (1)Get RSSI for HT rate */
844 for (i = 0; i < ((padapter->registrypriv.rf_config) &
845 0x0f); i++) {
846 rf_rx_num++;
847 rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i]
848 & 0x3F) * 2) - 110;
849 /* Translate DBM to percentage. */
850 rssi = query_rx_pwr_percentage(rx_pwr[i]);
851 total_rssi += rssi;
852 }
853 /* (2)PWDB, Average PWDB cacluated by hardware (for
854 * rate adaptive) */
855 rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f)
856 - 106;
857 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
858
859 {
860 /* (3)EVM of HT rate */
861 if (prframe->u.hdr.attrib.htc &&
862 prframe->u.hdr.attrib.mcs_rate >= 20 &&
863 prframe->u.hdr.attrib.mcs_rate <= 27) {
864 /* both spatial stream make sense */
865 max_spatial_stream = 2;
866 } else {
867 /* only spatial stream 1 makes sense */
868 max_spatial_stream = 1;
869 }
870 for (i = 0; i < max_spatial_stream; i++) {
871 evm = evm_db2percentage((pphy_head
872 [PHY_STAT_RXEVM_SHT + i]));/*dbm*/
873 prframe->u.hdr.attrib.signal_qual =
874 (u8)(evm & 0xff);
875 prframe->u.hdr.attrib.rx_mimo_signal_qual[i] =
876 (u8)(evm & 0xff);
877 }
878 }
879 }
880 /* UI BSS List signal strength(in percentage), make it good looking,
881 * from 0~100. It is assigned to the BSS List in
882 * GetValueFromBeaconOrProbeRsp(). */
883 if (bcck_rate)
884 prframe->u.hdr.attrib.signal_strength =
885 (u8)r8712_signal_scale_mapping(pwdb_all);
886 else {
887 if (rf_rx_num != 0)
888 prframe->u.hdr.attrib.signal_strength =
889 (u8)(r8712_signal_scale_mapping(total_rssi /=
890 rf_rx_num));
891 }
892 }
893
process_link_qual(struct _adapter * padapter,union recv_frame * prframe)894 static void process_link_qual(struct _adapter *padapter,
895 union recv_frame *prframe)
896 {
897 u32 last_evm = 0, tmpVal;
898 struct rx_pkt_attrib *pattrib;
899
900 if (prframe == NULL || padapter == NULL)
901 return;
902 pattrib = &prframe->u.hdr.attrib;
903 if (pattrib->signal_qual != 0) {
904 /*
905 * 1. Record the general EVM to the sliding window.
906 */
907 if (padapter->recvpriv.signal_qual_data.total_num++ >=
908 PHY_LINKQUALITY_SLID_WIN_MAX) {
909 padapter->recvpriv.signal_qual_data.total_num =
910 PHY_LINKQUALITY_SLID_WIN_MAX;
911 last_evm = padapter->recvpriv.signal_qual_data.elements
912 [padapter->recvpriv.signal_qual_data.index];
913 padapter->recvpriv.signal_qual_data.total_val -=
914 last_evm;
915 }
916 padapter->recvpriv.signal_qual_data.total_val +=
917 pattrib->signal_qual;
918 padapter->recvpriv.signal_qual_data.elements[padapter->
919 recvpriv.signal_qual_data.index++] =
920 pattrib->signal_qual;
921 if (padapter->recvpriv.signal_qual_data.index >=
922 PHY_LINKQUALITY_SLID_WIN_MAX)
923 padapter->recvpriv.signal_qual_data.index = 0;
924
925 /* <1> Showed on UI for user, in percentage. */
926 tmpVal = padapter->recvpriv.signal_qual_data.total_val /
927 padapter->recvpriv.signal_qual_data.total_num;
928 padapter->recvpriv.signal = (u8)tmpVal;
929 }
930 }
931
process_rssi(struct _adapter * padapter,union recv_frame * prframe)932 static void process_rssi(struct _adapter *padapter, union recv_frame *prframe)
933 {
934 u32 last_rssi, tmp_val;
935 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
936
937 if (padapter->recvpriv.signal_strength_data.total_num++ >=
938 PHY_RSSI_SLID_WIN_MAX) {
939 padapter->recvpriv.signal_strength_data.total_num =
940 PHY_RSSI_SLID_WIN_MAX;
941 last_rssi = padapter->recvpriv.signal_strength_data.elements
942 [padapter->recvpriv.signal_strength_data.index];
943 padapter->recvpriv.signal_strength_data.total_val -= last_rssi;
944 }
945 padapter->recvpriv.signal_strength_data.total_val +=
946 pattrib->signal_strength;
947 padapter->recvpriv.signal_strength_data.elements[padapter->recvpriv.
948 signal_strength_data.index++] =
949 pattrib->signal_strength;
950 if (padapter->recvpriv.signal_strength_data.index >=
951 PHY_RSSI_SLID_WIN_MAX)
952 padapter->recvpriv.signal_strength_data.index = 0;
953 tmp_val = padapter->recvpriv.signal_strength_data.total_val /
954 padapter->recvpriv.signal_strength_data.total_num;
955 padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val);
956 }
957
process_phy_info(struct _adapter * padapter,union recv_frame * prframe)958 static void process_phy_info(struct _adapter *padapter,
959 union recv_frame *prframe)
960 {
961 query_rx_phy_status(padapter, prframe);
962 process_rssi(padapter, prframe);
963 process_link_qual(padapter, prframe);
964 }
965
recv_func(struct _adapter * padapter,void * pcontext)966 int recv_func(struct _adapter *padapter, void *pcontext)
967 {
968 struct rx_pkt_attrib *pattrib;
969 union recv_frame *prframe, *orig_prframe;
970 int retval = _SUCCESS;
971 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
972 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
973
974 prframe = (union recv_frame *)pcontext;
975 orig_prframe = prframe;
976 pattrib = &prframe->u.hdr.attrib;
977 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
978 if (pattrib->crc_err == 1)
979 padapter->mppriv.rx_crcerrpktcount++;
980 else
981 padapter->mppriv.rx_pktcount++;
982 if (check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE) == false) {
983 /* free this recv_frame */
984 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
985 goto _exit_recv_func;
986 }
987 }
988 /* check the frame crtl field and decache */
989 retval = r8712_validate_recv_frame(padapter, prframe);
990 if (retval != _SUCCESS) {
991 /* free this recv_frame */
992 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
993 goto _exit_recv_func;
994 }
995 process_phy_info(padapter, prframe);
996 prframe = r8712_decryptor(padapter, prframe);
997 if (prframe == NULL) {
998 retval = _FAIL;
999 goto _exit_recv_func;
1000 }
1001 prframe = r8712_recvframe_chk_defrag(padapter, prframe);
1002 if (prframe == NULL)
1003 goto _exit_recv_func;
1004 prframe = r8712_portctrl(padapter, prframe);
1005 if (prframe == NULL) {
1006 retval = _FAIL;
1007 goto _exit_recv_func;
1008 }
1009 retval = r8712_process_recv_indicatepkts(padapter, prframe);
1010 if (retval != _SUCCESS) {
1011 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1012 goto _exit_recv_func;
1013 }
1014 _exit_recv_func:
1015 return retval;
1016 }
1017
recvbuf2recvframe(struct _adapter * padapter,struct sk_buff * pskb)1018 static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
1019 {
1020 u8 *pbuf, shift_sz = 0;
1021 u8 frag, mf;
1022 uint pkt_len;
1023 u32 transfer_len;
1024 struct recv_stat *prxstat;
1025 u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz;
1026 struct __queue *pfree_recv_queue;
1027 _pkt *pkt_copy = NULL;
1028 union recv_frame *precvframe = NULL;
1029 struct recv_priv *precvpriv = &padapter->recvpriv;
1030
1031 pfree_recv_queue = &(precvpriv->free_recv_queue);
1032 pbuf = pskb->data;
1033 prxstat = (struct recv_stat *)pbuf;
1034 pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16)&0xff;
1035 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1036 transfer_len = pskb->len;
1037 /* Test throughput with Netgear 3700 (No security) with Chariot 3T3R
1038 * pairs. The packet count will be a big number so that the containing
1039 * packet will effect the Rx reordering. */
1040 if (transfer_len < pkt_len) {
1041 /* In this case, it means the MAX_RECVBUF_SZ is too small to
1042 * get the data from 8712u. */
1043 return _FAIL;
1044 }
1045 do {
1046 prxstat = (struct recv_stat *)pbuf;
1047 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1048 /* more fragment bit */
1049 mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1;
1050 /* ragmentation number */
1051 frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf;
1052 /* uint 2^3 = 8 bytes */
1053 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
1054 drvinfo_sz = drvinfo_sz<<3;
1055 if (pkt_len <= 0)
1056 goto _exit_recvbuf2recvframe;
1057 /* Qos data, wireless lan header length is 26 */
1058 if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
1059 shift_sz = 2;
1060 precvframe = r8712_alloc_recvframe(pfree_recv_queue);
1061 if (precvframe == NULL)
1062 goto _exit_recvbuf2recvframe;
1063 INIT_LIST_HEAD(&precvframe->u.hdr.list);
1064 precvframe->u.hdr.precvbuf = NULL; /*can't access the precvbuf*/
1065 precvframe->u.hdr.len = 0;
1066 tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE;
1067 pkt_offset = (u16)round_up(tmp_len, 128);
1068 /* for first fragment packet, driver need allocate 1536 +
1069 * drvinfo_sz + RXDESC_SIZE to defrag packet. */
1070 if ((mf == 1) && (frag == 0))
1071 /*1658+6=1664, 1664 is 128 alignment.*/
1072 alloc_sz = max_t(u16, tmp_len, 1658);
1073 else
1074 alloc_sz = tmp_len;
1075 /* 2 is for IP header 4 bytes alignment in QoS packet case.
1076 * 4 is for skb->data 4 bytes alignment. */
1077 alloc_sz += 6;
1078 pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
1079 if (pkt_copy) {
1080 precvframe->u.hdr.pkt = pkt_copy;
1081 skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data)
1082 % 4));
1083 skb_reserve(pkt_copy, shift_sz);
1084 memcpy(pkt_copy->data, pbuf, tmp_len);
1085 precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data =
1086 precvframe->u.hdr.rx_tail = pkt_copy->data;
1087 precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
1088 } else {
1089 precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC);
1090 if (!precvframe->u.hdr.pkt)
1091 return _FAIL;
1092 precvframe->u.hdr.rx_head = pbuf;
1093 precvframe->u.hdr.rx_data = pbuf;
1094 precvframe->u.hdr.rx_tail = pbuf;
1095 precvframe->u.hdr.rx_end = pbuf + alloc_sz;
1096 }
1097 recvframe_put(precvframe, tmp_len);
1098 recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
1099 /* because the endian issue, driver avoid reference to the
1100 * rxstat after calling update_recvframe_attrib_from_recvstat();
1101 */
1102 update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib,
1103 prxstat);
1104 r8712_recv_entry(precvframe);
1105 transfer_len -= pkt_offset;
1106 pbuf += pkt_offset;
1107 pkt_cnt--;
1108 precvframe = NULL;
1109 pkt_copy = NULL;
1110 } while ((transfer_len > 0) && pkt_cnt > 0);
1111 _exit_recvbuf2recvframe:
1112 return _SUCCESS;
1113 }
1114
recv_tasklet(void * priv)1115 static void recv_tasklet(void *priv)
1116 {
1117 struct sk_buff *pskb;
1118 struct _adapter *padapter = (struct _adapter *)priv;
1119 struct recv_priv *precvpriv = &padapter->recvpriv;
1120
1121 while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
1122 recvbuf2recvframe(padapter, pskb);
1123 skb_reset_tail_pointer(pskb);
1124 pskb->len = 0;
1125 if (!skb_cloned(pskb))
1126 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
1127 else
1128 consume_skb(pskb);
1129 }
1130 }
1131