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