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Merge tag 'multiplatform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-block.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))
87a573ad 118 netdev_warn(padapter->pnetdev, "r8712u: rx_skb_queue not empty\n");
2865d42c
LF		 119 skb_queue_purge(&precvpriv->free_recv_skb_queue);
120 if (skb_queue_len(&precvpriv->free_recv_skb_queue))
87a573ad
PF		 121 netdev_warn(padapter->pnetdev, "r8712u: free_recv_skb_queue not empty %d\n",
122 skb_queue_len(&precvpriv->free_recv_skb_queue));
2865d42c
LF		 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)) {
87a573ad
PF		 367 netdev_warn(padapter->pnetdev, "r8712u: nRemain_Length is %d and nSubframe_Length is: %d\n",
368 a_len, nSubframe_Length);
2865d42c
LF		 369 goto exit;
370 }
371 /* move the data point to data content */
372 pdata += ETH_HLEN;
373 a_len -= ETH_HLEN;
374 /* Allocate new skb for releasing to upper layer */
375 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
5ca136a0
LF		 376 if (!sub_skb)
377 break;
2865d42c
LF		 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) {
87a573ad 383 netdev_warn(padapter->pnetdev, "r8712u: ParseSubframe(): Too many Subframes! Packets dropped!\n");
2865d42c
LF		 384 break;
385 }
386 pdata += nSubframe_Length;
387 a_len -= nSubframe_Length;
388 if (a_len != 0) {
389 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3);
390 if (padding_len == 4)
391 padding_len = 0;
392 if (a_len < padding_len)
393 goto exit;
394 pdata += padding_len;
395 a_len -= padding_len;
396 }
397 }
398 for (i = 0; i < nr_subframes; i++) {
399 sub_skb = subframes[i];
400 /* convert hdr + possible LLC headers into Ethernet header */
401 eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7];
402 if (sub_skb->len >= 8 &&
403 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
404 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
405 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
406 /* remove RFC1042 or Bridge-Tunnel encapsulation and
407 * replace EtherType */
408 skb_pull(sub_skb, SNAP_SIZE);
409 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
410 ETH_ALEN);
411 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
412 ETH_ALEN);
413 } else {
414 u16 len;
415 /* Leave Ethernet header part of hdr and full payload */
416 len = htons(sub_skb->len);
417 memcpy(skb_push(sub_skb, 2), &len, 2);
418 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src,
419 ETH_ALEN);
420 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst,
421 ETH_ALEN);
422 }
423 /* Indicate the packets to upper layer */
424 if (sub_skb) {
425 sub_skb->protocol =
426 eth_type_trans(sub_skb, padapter->pnetdev);
427 sub_skb->dev = padapter->pnetdev;
428 if ((pattrib->tcpchk_valid == 1) &&
429 (pattrib->tcp_chkrpt == 1)) {
430 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
431 } else
432 sub_skb->ip_summed = CHECKSUM_NONE;
433 netif_rx(sub_skb);
434 }
435 }
436exit:
437 prframe->u.hdr.len = 0;
438 r8712_free_recvframe(prframe, pfree_recv_queue);
439 return ret;
440}
441
442void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
443{
444 uint voffset;
445 u8 *poffset;
446 u16 pkt_len, cmd_len, drvinfo_sz;
447 u8 eid, cmd_seq;
448 struct recv_stat *prxstat;
449
450 poffset = (u8 *)prxcmdbuf;
451 voffset = *(uint *)poffset;
452 pkt_len = le32_to_cpu(voffset) & 0x00003fff;
453 prxstat = (struct recv_stat *)prxcmdbuf;
454 drvinfo_sz = ((le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16);
455 drvinfo_sz = drvinfo_sz << 3;
456 poffset += RXDESC_SIZE + drvinfo_sz;
457 do {
458 voffset = *(uint *)poffset;
459 cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
460 cmd_seq = (u8)((le32_to_cpu(voffset) >> 24) & 0x7f);
461 eid = (u8)((le32_to_cpu(voffset) >> 16) & 0xff);
462 r8712_event_handle(padapter, (uint *)poffset);
be10ac2b 463 poffset += (cmd_len + 8);/*8 bytes alignment*/
2865d42c
LF		 464 } while (le32_to_cpu(voffset) & BIT(31));
465
466}
467
468static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl,
469 u16 seq_num)
470{
471 u8 wsize = preorder_ctrl->wsize_b;
472 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) % 4096;
473
474 /* Rx Reorder initialize condition.*/
475 if (preorder_ctrl->indicate_seq == 0xffff)
476 preorder_ctrl->indicate_seq = seq_num;
477 /* Drop out the packet which SeqNum is smaller than WinStart */
478 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
479 return false;
480 /*
481 * Sliding window manipulation. Conditions includes:
482 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
483 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
484 */
485 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq))
486 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq +
487 1) % 4096;
488 else if (SN_LESS(wend, seq_num)) {
489 if (seq_num >= (wsize - 1))
490 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
491 else
492 preorder_ctrl->indicate_seq = 4095 - (wsize -
493 (seq_num + 1)) + 1;
494 }
495 return true;
496}
497
498static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
499 union recv_frame *prframe)
500{
501 struct list_head *phead, *plist;
502 union recv_frame *pnextrframe;
503 struct rx_pkt_attrib *pnextattrib;
504 struct __queue *ppending_recvframe_queue =
505 &preorder_ctrl->pending_recvframe_queue;
506 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
507
508 phead = get_list_head(ppending_recvframe_queue);
509 plist = get_next(phead);
510 while (end_of_queue_search(phead, plist) == false) {
511 pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u);
512 pnextattrib = &pnextrframe->u.hdr.attrib;
513 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
514 plist = get_next(plist);
515 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
516 return false;
517 else
518 break;
519 }
520 list_delete(&(prframe->u.hdr.list));
521 list_insert_tail(&(prframe->u.hdr.list), plist);
522 return true;
523}
524
525int r8712_recv_indicatepkts_in_order(struct _adapter *padapter,
526 struct recv_reorder_ctrl *preorder_ctrl,
527 int bforced)
528{
529 struct list_head *phead, *plist;
530 union recv_frame *prframe;
531 struct rx_pkt_attrib *pattrib;
532 int bPktInBuf = false;
533 struct recv_priv *precvpriv = &padapter->recvpriv;
534 struct __queue *ppending_recvframe_queue =
535 &preorder_ctrl->pending_recvframe_queue;
536
537 phead = get_list_head(ppending_recvframe_queue);
538 plist = get_next(phead);
539 /* Handling some condition for forced indicate case.*/
540 if (bforced == true) {
541 if (is_list_empty(phead))
542 return true;
543 else {
544 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
545 pattrib = &prframe->u.hdr.attrib;
546 preorder_ctrl->indicate_seq = pattrib->seq_num;
547 }
548 }
549 /* Prepare indication list and indication.
550 * Check if there is any packet need indicate. */
551 while (!is_list_empty(phead)) {
552 prframe = LIST_CONTAINOR(plist, union recv_frame, u);
553 pattrib = &prframe->u.hdr.attrib;
554 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
555 plist = get_next(plist);
556 list_delete(&(prframe->u.hdr.list));
557 if (SN_EQUAL(preorder_ctrl->indicate_seq,
558 pattrib->seq_num))
559 preorder_ctrl->indicate_seq =
560 (preorder_ctrl->indicate_seq + 1) % 4096;
561 /*indicate this recv_frame*/
562 if (!pattrib->amsdu) {
563 if ((padapter->bDriverStopped == false) &&
564 (padapter->bSurpriseRemoved == false)) {
565 /* indicate this recv_frame */
566 r8712_recv_indicatepkt(padapter,
567 prframe);
568 }
569 } else if (pattrib->amsdu == 1) {
570 if (amsdu_to_msdu(padapter, prframe) !=
571 _SUCCESS)
572 r8712_free_recvframe(prframe,
573 &precvpriv->free_recv_queue);
574 }
575 /* Update local variables. */
576 bPktInBuf = false;
577 } else {
578 bPktInBuf = true;
579 break;
580 }
581 }
582 return bPktInBuf;
583}
584
585static int recv_indicatepkt_reorder(struct _adapter *padapter,
586 union recv_frame *prframe)
587{
588 unsigned long irql;
589 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
590 struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
591 struct __queue *ppending_recvframe_queue =
592 &preorder_ctrl->pending_recvframe_queue;
593
594 if (!pattrib->amsdu) {
595 /* s1. */
596 r8712_wlanhdr_to_ethhdr(prframe);
597 if (pattrib->qos != 1) {
598 if ((padapter->bDriverStopped == false) &&
599 (padapter->bSurpriseRemoved == false)) {
600 r8712_recv_indicatepkt(padapter, prframe);
601 return _SUCCESS;
602 } else
603 return _FAIL;
604 }
605 }
606 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
be10ac2b 607 /*s2. check if winstart_b(indicate_seq) needs to be updated*/
2865d42c
LF		 608 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num))
609 goto _err_exit;
610 /*s3. Insert all packet into Reorder Queue to maintain its ordering.*/
611 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
612 goto _err_exit;
613 /*s4.
614 * Indication process.
615 * After Packet dropping and Sliding Window shifting as above, we can
616 * now just indicate the packets with the SeqNum smaller than latest
617 * WinStart and buffer other packets.
618 *
619 * For Rx Reorder condition:
620 * 1. All packets with SeqNum smaller than WinStart => Indicate
621 * 2. All packets with SeqNum larger than or equal to
622 * WinStart => Buffer it.
623 */
624 if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false) ==
625 true) {
626 _set_timer(&preorder_ctrl->reordering_ctrl_timer,
627 REORDER_WAIT_TIME);
628 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
629 } else {
630 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
631 _cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
632 }
633 return _SUCCESS;
634_err_exit:
635 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
636 return _FAIL;
637}
638
639void r8712_reordering_ctrl_timeout_handler(void *pcontext)
640{
641 unsigned long irql;
642 struct recv_reorder_ctrl *preorder_ctrl =
643 (struct recv_reorder_ctrl *)pcontext;
644 struct _adapter *padapter = preorder_ctrl->padapter;
645 struct __queue *ppending_recvframe_queue =
646 &preorder_ctrl->pending_recvframe_queue;
647
648 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
649 return;
650 spin_lock_irqsave(&ppending_recvframe_queue->lock, irql);
651 r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, true);
652 spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql);
653}
654
655static int r8712_process_recv_indicatepkts(struct _adapter *padapter,
656 union recv_frame *prframe)
657{
658 int retval = _SUCCESS;
659 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
660 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
661
662 if (phtpriv->ht_option == 1) { /*B/G/N Mode*/
663 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
664 /* including perform A-MPDU Rx Ordering Buffer Control*/
665 if ((padapter->bDriverStopped == false) &&
666 (padapter->bSurpriseRemoved == false))
667 return _FAIL;
668 }
669 } else { /*B/G mode*/
670 retval = r8712_wlanhdr_to_ethhdr(prframe);
671 if (retval != _SUCCESS)
672 return retval;
673 if ((padapter->bDriverStopped == false) &&
674 (padapter->bSurpriseRemoved == false)) {
675 /* indicate this recv_frame */
676 r8712_recv_indicatepkt(padapter, prframe);
677 } else
678 return _FAIL;
679 }
680 return retval;
681}
682
683static u8 query_rx_pwr_percentage(s8 antpower)
684{
685 if ((antpower <= -100) || (antpower >= 20))
686 return 0;
687 else if (antpower >= 0)
688 return 100;
689 else
690 return 100 + antpower;
691}
692
693static u8 evm_db2percentage(s8 value)
694{
695 /*
696 * -33dB~0dB to 0%~99%
697 */
698 s8 ret_val;
699
700 ret_val = value;
701 if (ret_val >= 0)
702 ret_val = 0;
703 if (ret_val <= -33)
704 ret_val = -33;
705 ret_val = -ret_val;
706 ret_val *= 3;
707 if (ret_val == 99)
708 ret_val = 100;
709 return ret_val;
710}
711
712s32 r8712_signal_scale_mapping(s32 cur_sig)
713{
714 s32 ret_sig;
715
716 if (cur_sig >= 51 && cur_sig <= 100)
717 ret_sig = 100;
718 else if (cur_sig >= 41 && cur_sig <= 50)
719 ret_sig = 80 + ((cur_sig - 40) * 2);
720 else if (cur_sig >= 31 && cur_sig <= 40)
721 ret_sig = 66 + (cur_sig - 30);
722 else if (cur_sig >= 21 && cur_sig <= 30)
723 ret_sig = 54 + (cur_sig - 20);
724 else if (cur_sig >= 10 && cur_sig <= 20)
725 ret_sig = 42 + (((cur_sig - 10) * 2) / 3);
726 else if (cur_sig >= 5 && cur_sig <= 9)
727 ret_sig = 22 + (((cur_sig - 5) * 3) / 2);
728 else if (cur_sig >= 1 && cur_sig <= 4)
729 ret_sig = 6 + (((cur_sig - 1) * 3) / 2);
730 else
731 ret_sig = cur_sig;
732 return ret_sig;
733}
734
735static s32 translate2dbm(struct _adapter *padapter, u8 signal_strength_idx)
736{
737 s32 signal_power; /* in dBm.*/
738 /* Translate to dBm (x=0.5y-95).*/
739 signal_power = (s32)((signal_strength_idx + 1) >> 1);
740 signal_power -= 95;
741 return signal_power;
742}
743
744static void query_rx_phy_status(struct _adapter *padapter,
745 union recv_frame *prframe)
746{
747 u8 i, max_spatial_stream, evm;
748 struct recv_stat *prxstat = (struct recv_stat *)prframe->u.hdr.rx_head;
749 struct phy_stat *pphy_stat = (struct phy_stat *)(prxstat + 1);
750 u8 *pphy_head = (u8 *)(prxstat + 1);
751 s8 rx_pwr[4], rx_pwr_all;
752 u8 pwdb_all;
753 u32 rssi, total_rssi = 0;
754 u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0;
755 struct phy_cck_rx_status *pcck_buf;
756 u8 sq;
757
758 /* Record it for next packet processing*/
759 bcck_rate = (prframe->u.hdr.attrib.mcs_rate <= 3 ? 1 : 0);
760 if (bcck_rate) {
761 u8 report;
762
763 /* CCK Driver info Structure is not the same as OFDM packet.*/
764 pcck_buf = (struct phy_cck_rx_status *)pphy_stat;
765 /* (1)Hardware does not provide RSSI for CCK
766 * (2)PWDB, Average PWDB cacluated by hardware
767 * (for rate adaptive)
768 */
769 if (!cck_highpwr) {
770 report = pcck_buf->cck_agc_rpt & 0xc0;
771 report = report >> 6;
772 switch (report) {
773 /* Modify the RF RNA gain value to -40, -20,
774 * -2, 14 by Jenyu's suggestion
775 * Note: different RF with the different
776 * RNA gain. */
777 case 0x3:
778 rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt &
779 0x3e);
780 break;
781 case 0x2:
782 rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt &
783 0x3e);
784 break;
785 case 0x1:
786 rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt &
787 0x3e);
788 break;
789 case 0x0:
790 rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt &
791 0x3e);
792 break;
793 }
794 } else {
795 report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) &
796 0x60;
797 report = report >> 5;
798 switch (report) {
799 case 0x3:
800 rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt &
801 0x1f) << 1);
802 break;
803 case 0x2:
804 rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt &
805 0x1f) << 1);
806 break;
807 case 0x1:
808 rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt &
809 0x1f) << 1);
810 break;
811 case 0x0:
812 rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt &
813 0x1f) << 1);
814 break;
815 }
816 }
817 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
818 /* CCK gain is smaller than OFDM/MCS gain,*/
819 /* so we add gain diff by experiences, the val is 6 */
820 pwdb_all += 6;
821 if (pwdb_all > 100)
822 pwdb_all = 100;
823 /* modify the offset to make the same gain index with OFDM.*/
824 if (pwdb_all > 34 && pwdb_all <= 42)
825 pwdb_all -= 2;
826 else if (pwdb_all > 26 && pwdb_all <= 34)
827 pwdb_all -= 6;
828 else if (pwdb_all > 14 && pwdb_all <= 26)
829 pwdb_all -= 8;
830 else if (pwdb_all > 4 && pwdb_all <= 14)
831 pwdb_all -= 4;
832 /*
833 * (3) Get Signal Quality (EVM)
834 */
835 if (pwdb_all > 40)
836 sq = 100;
837 else {
838 sq = pcck_buf->sq_rpt;
839 if (pcck_buf->sq_rpt > 64)
840 sq = 0;
841 else if (pcck_buf->sq_rpt < 20)
842 sq = 100;
843 else
844 sq = ((64-sq) * 100) / 44;
845 }
846 prframe->u.hdr.attrib.signal_qual = sq;
847 prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq;
848 prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1;
849 } else {
850 /* (1)Get RSSI for HT rate */
851 for (i = 0; i < ((padapter->registrypriv.rf_config) &
852 0x0f) ; i++) {
853 rf_rx_num++;
854 rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i]
855 & 0x3F) * 2) - 110;
856 /* Translate DBM to percentage. */
857 rssi = query_rx_pwr_percentage(rx_pwr[i]);
858 total_rssi += rssi;
859 }
860 /* (2)PWDB, Average PWDB cacluated by hardware (for
861 * rate adaptive) */
862 rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f)
863 - 106;
864 pwdb_all = query_rx_pwr_percentage(rx_pwr_all);
865
866 {
867 /* (3)EVM of HT rate */
868 if (prframe->u.hdr.attrib.htc &&
869 prframe->u.hdr.attrib.mcs_rate >= 20 &&
870 prframe->u.hdr.attrib.mcs_rate <= 27) {
871 /* both spatial stream make sense */
872 max_spatial_stream = 2;
873 } else {
874 /* only spatial stream 1 makes sense */
875 max_spatial_stream = 1;
876 }
877 for (i = 0; i < max_spatial_stream; i++) {
878 evm = evm_db2percentage((pphy_head
879 [PHY_STAT_RXEVM_SHT + i]));/*dbm*/
880 prframe->u.hdr.attrib.signal_qual =
881 (u8)(evm & 0xff);
882 prframe->u.hdr.attrib.rx_mimo_signal_qual[i] =
883 (u8)(evm & 0xff);
884 }
885 }
886 }
887 /* UI BSS List signal strength(in percentage), make it good looking,
888 * from 0~100. It is assigned to the BSS List in
889 * GetValueFromBeaconOrProbeRsp(). */
890 if (bcck_rate)
891 prframe->u.hdr.attrib.signal_strength =
892 (u8)r8712_signal_scale_mapping(pwdb_all);
893 else {
894 if (rf_rx_num != 0)
895 prframe->u.hdr.attrib.signal_strength =
896 (u8)(r8712_signal_scale_mapping(total_rssi /=
897 rf_rx_num));
898 }
899}
900
901static void process_link_qual(struct _adapter *padapter,
902 union recv_frame *prframe)
903{
904 u32 last_evm = 0, tmpVal;
905 struct rx_pkt_attrib *pattrib;
906
907 if (prframe == NULL || padapter == NULL)
908 return;
909 pattrib = &prframe->u.hdr.attrib;
910 if (pattrib->signal_qual != 0) {
911 /*
912 * 1. Record the general EVM to the sliding window.
913 */
914 if (padapter->recvpriv.signal_qual_data.total_num++ >=
915 PHY_LINKQUALITY_SLID_WIN_MAX) {
916 padapter->recvpriv.signal_qual_data.total_num =
917 PHY_LINKQUALITY_SLID_WIN_MAX;
918 last_evm = padapter->recvpriv.signal_qual_data.elements
919 [padapter->recvpriv.signal_qual_data.index];
920 padapter->recvpriv.signal_qual_data.total_val -=
921 last_evm;
922 }
923 padapter->recvpriv.signal_qual_data.total_val +=
924 pattrib->signal_qual;
925 padapter->recvpriv.signal_qual_data.elements[padapter->
926 recvpriv.signal_qual_data.index++] =
927 pattrib->signal_qual;
928 if (padapter->recvpriv.signal_qual_data.index >=
929 PHY_LINKQUALITY_SLID_WIN_MAX)
930 padapter->recvpriv.signal_qual_data.index = 0;
931
932 /* <1> Showed on UI for user, in percentage. */
933 tmpVal = padapter->recvpriv.signal_qual_data.total_val /
934 padapter->recvpriv.signal_qual_data.total_num;
935 padapter->recvpriv.signal = (u8)tmpVal;
936 }
937}
938
939static void process_rssi(struct _adapter *padapter, union recv_frame *prframe)
940{
941 u32 last_rssi, tmp_val;
942 struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
943
944 if (padapter->recvpriv.signal_strength_data.total_num++ >=
945 PHY_RSSI_SLID_WIN_MAX) {
946 padapter->recvpriv.signal_strength_data.total_num =
947 PHY_RSSI_SLID_WIN_MAX;
948 last_rssi = padapter->recvpriv.signal_strength_data.elements
949 [padapter->recvpriv.signal_strength_data.index];
950 padapter->recvpriv.signal_strength_data.total_val -= last_rssi;
951 }
952 padapter->recvpriv.signal_strength_data.total_val +=
953 pattrib->signal_strength;
954 padapter->recvpriv.signal_strength_data.elements[padapter->recvpriv.
955 signal_strength_data.index++] =
956 pattrib->signal_strength;
957 if (padapter->recvpriv.signal_strength_data.index >=
958 PHY_RSSI_SLID_WIN_MAX)
959 padapter->recvpriv.signal_strength_data.index = 0;
960 tmp_val = padapter->recvpriv.signal_strength_data.total_val /
961 padapter->recvpriv.signal_strength_data.total_num;
962 padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val);
963}
964
965static void process_phy_info(struct _adapter *padapter,
966 union recv_frame *prframe)
967{
968 query_rx_phy_status(padapter, prframe);
969 process_rssi(padapter, prframe);
970 process_link_qual(padapter, prframe);
971}
972
973int recv_func(struct _adapter *padapter, void *pcontext)
974{
975 struct rx_pkt_attrib *pattrib;
976 union recv_frame *prframe, *orig_prframe;
977 int retval = _SUCCESS;
978 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
979 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
980
981 prframe = (union recv_frame *)pcontext;
982 orig_prframe = prframe;
983 pattrib = &prframe->u.hdr.attrib;
984 if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) {
985 if (pattrib->crc_err == 1)
986 padapter->mppriv.rx_crcerrpktcount++;
987 else
988 padapter->mppriv.rx_pktcount++;
989 if (check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE) == false) {
990 /* free this recv_frame */
991 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
992 goto _exit_recv_func;
993 }
994 }
995 /* check the frame crtl field and decache */
996 retval = r8712_validate_recv_frame(padapter, prframe);
997 if (retval != _SUCCESS) {
998 /* free this recv_frame */
999 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1000 goto _exit_recv_func;
1001 }
1002 process_phy_info(padapter, prframe);
1003 prframe = r8712_decryptor(padapter, prframe);
1004 if (prframe == NULL) {
1005 retval = _FAIL;
1006 goto _exit_recv_func;
1007 }
1008 prframe = r8712_recvframe_chk_defrag(padapter, prframe);
1009 if (prframe == NULL)
1010 goto _exit_recv_func;
1011 prframe = r8712_portctrl(padapter, prframe);
1012 if (prframe == NULL) {
1013 retval = _FAIL;
1014 goto _exit_recv_func;
1015 }
1016 retval = r8712_process_recv_indicatepkts(padapter, prframe);
1017 if (retval != _SUCCESS) {
1018 r8712_free_recvframe(orig_prframe, pfree_recv_queue);
1019 goto _exit_recv_func;
1020 }
1021_exit_recv_func:
1022 return retval;
1023}
1024
1025static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb)
1026{
1027 u8 *pbuf, shift_sz = 0;
1028 u8 frag, mf;
1029 uint pkt_len;
1030 u32 transfer_len;
1031 struct recv_stat *prxstat;
1032 u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz;
1033 struct __queue *pfree_recv_queue;
1034 _pkt *pkt_copy = NULL;
1035 union recv_frame *precvframe = NULL;
1036 struct recv_priv *precvpriv = &padapter->recvpriv;
1037
1038 pfree_recv_queue = &(precvpriv->free_recv_queue);
1039 pbuf = pskb->data;
1040 prxstat = (struct recv_stat *)pbuf;
1041 pkt_cnt = (le32_to_cpu(prxstat->rxdw2)>>16)&0xff;
1042 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1043 transfer_len = pskb->len;
1044 /* Test throughput with Netgear 3700 (No security) with Chariot 3T3R
1045 * pairs. The packet count will be a big number so that the containing
1046 * packet will effect the Rx reordering. */
1047 if (transfer_len < pkt_len) {
1048 /* In this case, it means the MAX_RECVBUF_SZ is too small to
1049 * get the data from 8712u. */
1050 return _FAIL;
1051 }
1052 do {
1053 prxstat = (struct recv_stat *)pbuf;
1054 pkt_len = le32_to_cpu(prxstat->rxdw0)&0x00003fff;
1055 /* more fragment bit */
1056 mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1;
1057 /* ragmentation number */
1058 frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf;
1059 /* uint 2^3 = 8 bytes */
1060 drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
1061 drvinfo_sz = drvinfo_sz<<3;
1062 if (pkt_len <= 0)
1063 goto _exit_recvbuf2recvframe;
1064 /* Qos data, wireless lan header length is 26 */
1065 if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01)
1066 shift_sz = 2;
1067 precvframe = r8712_alloc_recvframe(pfree_recv_queue);
1068 if (precvframe == NULL)
1069 goto _exit_recvbuf2recvframe;
1070 _init_listhead(&precvframe->u.hdr.list);
1071 precvframe->u.hdr.precvbuf = NULL; /*can't access the precvbuf*/
1072 precvframe->u.hdr.len = 0;
1073 tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE;
1074 pkt_offset = (u16)_RND128(tmp_len);
1075 /* for first fragment packet, driver need allocate 1536 +
1076 * drvinfo_sz + RXDESC_SIZE to defrag packet. */
1077 if ((mf == 1) && (frag == 0))
ee5b1aad 1078 alloc_sz = 1658;/*1658+6=1664, 1664 is 128 alignment.*/
2865d42c
LF		 1079 else
1080 alloc_sz = tmp_len;
1081 /* 2 is for IP header 4 bytes alignment in QoS packet case.
1082 * 4 is for skb->data 4 bytes alignment. */
1083 alloc_sz += 6;
1084 pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz);
1085 if (pkt_copy) {
1086 pkt_copy->dev = padapter->pnetdev;
1087 precvframe->u.hdr.pkt = pkt_copy;
1088 skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data)
1089 % 4));
1090 skb_reserve(pkt_copy, shift_sz);
1091 memcpy(pkt_copy->data, pbuf, tmp_len);
1092 precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data =
1093 precvframe->u.hdr.rx_tail = pkt_copy->data;
1094 precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz;
1095 } else {
1096 precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC);
5ca136a0
LF		 1097 if (!precvframe->u.hdr.pkt)
1098 return _FAIL;
2865d42c
LF		 1099 precvframe->u.hdr.rx_head = pbuf;
1100 precvframe->u.hdr.rx_data = pbuf;
1101 precvframe->u.hdr.rx_tail = pbuf;
1102 precvframe->u.hdr.rx_end = pbuf + alloc_sz;
1103 }
1104 recvframe_put(precvframe, tmp_len);
1105 recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE);
1106 /* because the endian issue, driver avoid reference to the
1107 * rxstat after calling update_recvframe_attrib_from_recvstat();
1108 */
1109 update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib,
1110 prxstat);
1111 r8712_recv_entry(precvframe);
1112 transfer_len -= pkt_offset;
1113 pbuf += pkt_offset;
1114 pkt_cnt--;
1115 precvframe = NULL;
1116 pkt_copy = NULL;
1117 } while ((transfer_len > 0) && pkt_cnt > 0);
1118_exit_recvbuf2recvframe:
1119 return _SUCCESS;
1120}
1121
1122static void recv_tasklet(void *priv)
1123{
1124 struct sk_buff *pskb;
1125 struct _adapter *padapter = (struct _adapter *)priv;
1126 struct recv_priv *precvpriv = &padapter->recvpriv;
1127
1128 while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
1129 recvbuf2recvframe(padapter, pskb);
1130 skb_reset_tail_pointer(pskb);
1131 pskb->len = 0;
fa16e5ea
LF		 1132 if (!skb_cloned(pskb))
1133 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
1134 else
1135 consume_skb(pskb);
2865d42c
LF		 1136 }
1137}
Linux 6.x block layer and io_uring tree(s)