| /****************************************************************************** |
| * rtl8712_recv.c |
| * |
| * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. |
| * Linux device driver for RTL8192SU |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| * |
| * Modifications for inclusion into the Linux staging tree are |
| * Copyright(c) 2010 Larry Finger. All rights reserved. |
| * |
| * Contact information: |
| * WLAN FAE <wlanfae@realtek.com> |
| * Larry Finger <Larry.Finger@lwfinger.net> |
| * |
| ******************************************************************************/ |
| |
| #define _RTL8712_RECV_C_ |
| |
| #include <linux/if_ether.h> |
| #include <linux/ip.h> |
| |
| #include "osdep_service.h" |
| #include "drv_types.h" |
| #include "recv_osdep.h" |
| #include "mlme_osdep.h" |
| #include "ethernet.h" |
| #include "usb_ops.h" |
| #include "wifi.h" |
| |
| /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| static u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8}; |
| |
| /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
| static u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00}; |
| |
| static void recv_tasklet(void *priv); |
| |
| int r8712_init_recv_priv(struct recv_priv *precvpriv, struct _adapter *padapter) |
| { |
| int i; |
| struct recv_buf *precvbuf; |
| int res = _SUCCESS; |
| addr_t tmpaddr = 0; |
| int alignment = 0; |
| struct sk_buff *pskb = NULL; |
| |
| /*init recv_buf*/ |
| _init_queue(&precvpriv->free_recv_buf_queue); |
| precvpriv->pallocated_recv_buf = |
| kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4, GFP_ATOMIC); |
| if (!precvpriv->pallocated_recv_buf) |
| return _FAIL; |
| precvpriv->precv_buf = precvpriv->pallocated_recv_buf + 4 - |
| ((addr_t) (precvpriv->pallocated_recv_buf) & 3); |
| precvbuf = (struct recv_buf *)precvpriv->precv_buf; |
| for (i = 0; i < NR_RECVBUFF; i++) { |
| INIT_LIST_HEAD(&precvbuf->list); |
| spin_lock_init(&precvbuf->recvbuf_lock); |
| res = r8712_os_recvbuf_resource_alloc(padapter, precvbuf); |
| if (res == _FAIL) |
| break; |
| precvbuf->ref_cnt = 0; |
| precvbuf->adapter = padapter; |
| list_add_tail(&precvbuf->list, |
| &(precvpriv->free_recv_buf_queue.queue)); |
| precvbuf++; |
| } |
| precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF; |
| tasklet_init(&precvpriv->recv_tasklet, |
| (void(*)(unsigned long))recv_tasklet, |
| (unsigned long)padapter); |
| skb_queue_head_init(&precvpriv->rx_skb_queue); |
| |
| skb_queue_head_init(&precvpriv->free_recv_skb_queue); |
| for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) { |
| pskb = netdev_alloc_skb(padapter->pnetdev, MAX_RECVBUF_SZ + |
| RECVBUFF_ALIGN_SZ); |
| if (pskb) { |
| tmpaddr = (addr_t)pskb->data; |
| alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1); |
| skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignment)); |
| skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb); |
| } |
| pskb = NULL; |
| } |
| return res; |
| } |
| |
| void r8712_free_recv_priv(struct recv_priv *precvpriv) |
| { |
| int i; |
| struct recv_buf *precvbuf; |
| struct _adapter *padapter = precvpriv->adapter; |
| |
| precvbuf = (struct recv_buf *)precvpriv->precv_buf; |
| for (i = 0; i < NR_RECVBUFF; i++) { |
| r8712_os_recvbuf_resource_free(padapter, precvbuf); |
| precvbuf++; |
| } |
| kfree(precvpriv->pallocated_recv_buf); |
| skb_queue_purge(&precvpriv->rx_skb_queue); |
| if (skb_queue_len(&precvpriv->rx_skb_queue)) |
| netdev_warn(padapter->pnetdev, "r8712u: rx_skb_queue not empty\n"); |
| skb_queue_purge(&precvpriv->free_recv_skb_queue); |
| if (skb_queue_len(&precvpriv->free_recv_skb_queue)) |
| netdev_warn(padapter->pnetdev, "r8712u: free_recv_skb_queue not empty %d\n", |
| skb_queue_len(&precvpriv->free_recv_skb_queue)); |
| } |
| |
| int r8712_init_recvbuf(struct _adapter *padapter, struct recv_buf *precvbuf) |
| { |
| precvbuf->transfer_len = 0; |
| precvbuf->len = 0; |
| precvbuf->ref_cnt = 0; |
| if (precvbuf->pbuf) { |
| precvbuf->pdata = precvbuf->pbuf; |
| precvbuf->phead = precvbuf->pbuf; |
| precvbuf->ptail = precvbuf->pbuf; |
| precvbuf->pend = precvbuf->pdata + MAX_RECVBUF_SZ; |
| } |
| return _SUCCESS; |
| } |
| |
| int r8712_free_recvframe(union recv_frame *precvframe, |
| struct __queue *pfree_recv_queue) |
| { |
| unsigned long irqL; |
| struct _adapter *padapter = precvframe->u.hdr.adapter; |
| struct recv_priv *precvpriv = &padapter->recvpriv; |
| |
| if (precvframe->u.hdr.pkt) { |
| dev_kfree_skb_any(precvframe->u.hdr.pkt);/*free skb by driver*/ |
| precvframe->u.hdr.pkt = NULL; |
| } |
| spin_lock_irqsave(&pfree_recv_queue->lock, irqL); |
| list_del_init(&(precvframe->u.hdr.list)); |
| list_add_tail(&(precvframe->u.hdr.list), &pfree_recv_queue->queue); |
| if (padapter != NULL) { |
| if (pfree_recv_queue == &precvpriv->free_recv_queue) |
| precvpriv->free_recvframe_cnt++; |
| } |
| spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL); |
| return _SUCCESS; |
| } |
| |
| static void update_recvframe_attrib_from_recvstat(struct rx_pkt_attrib *pattrib, |
| struct recv_stat *prxstat) |
| { |
| u16 drvinfo_sz; |
| |
| drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16; |
| drvinfo_sz <<= 3; |
| /*TODO: |
| * Offset 0 |
| */ |
| pattrib->bdecrypted = ((le32_to_cpu(prxstat->rxdw0) & BIT(27)) >> 27) |
| ? 0 : 1; |
| pattrib->crc_err = (le32_to_cpu(prxstat->rxdw0) & BIT(14)) >> 14; |
| /*Offset 4*/ |
| /*Offset 8*/ |
| /*Offset 12*/ |
| if (le32_to_cpu(prxstat->rxdw3) & BIT(13)) { |
| pattrib->tcpchk_valid = 1; /* valid */ |
| if (le32_to_cpu(prxstat->rxdw3) & BIT(11)) |
| pattrib->tcp_chkrpt = 1; /* correct */ |
| else |
| pattrib->tcp_chkrpt = 0; /* incorrect */ |
| if (le32_to_cpu(prxstat->rxdw3) & BIT(12)) |
| pattrib->ip_chkrpt = 1; /* correct */ |
| else |
| pattrib->ip_chkrpt = 0; /* incorrect */ |
| } else { |
| pattrib->tcpchk_valid = 0; /* invalid */ |
| } |
| pattrib->mcs_rate = (u8)((le32_to_cpu(prxstat->rxdw3)) & 0x3f); |
| pattrib->htc = (u8)((le32_to_cpu(prxstat->rxdw3) >> 14) & 0x1); |
| /*Offset 16*/ |
| /*Offset 20*/ |
| /*phy_info*/ |
| } |
| |
| /*perform defrag*/ |
| static union recv_frame *recvframe_defrag(struct _adapter *adapter, |
| struct __queue *defrag_q) |
| { |
| struct list_head *plist, *phead; |
| u8 wlanhdr_offset; |
| u8 curfragnum; |
| struct recv_frame_hdr *pfhdr, *pnfhdr; |
| union recv_frame *prframe, *pnextrframe; |
| struct __queue *pfree_recv_queue; |
| |
| pfree_recv_queue = &adapter->recvpriv.free_recv_queue; |
| phead = &defrag_q->queue; |
| plist = phead->next; |
| prframe = container_of(plist, union recv_frame, u.list); |
| list_del_init(&prframe->u.list); |
| pfhdr = &prframe->u.hdr; |
| curfragnum = 0; |
| if (curfragnum != pfhdr->attrib.frag_num) { |
| /*the first fragment number must be 0 |
| *free the whole queue |
| */ |
| r8712_free_recvframe(prframe, pfree_recv_queue); |
| r8712_free_recvframe_queue(defrag_q, pfree_recv_queue); |
| return NULL; |
| } |
| curfragnum++; |
| plist = &defrag_q->queue; |
| plist = plist->next; |
| while (!end_of_queue_search(phead, plist)) { |
| pnextrframe = container_of(plist, union recv_frame, u.list); |
| pnfhdr = &pnextrframe->u.hdr; |
| /*check the fragment sequence (2nd ~n fragment frame) */ |
| if (curfragnum != pnfhdr->attrib.frag_num) { |
| /* the fragment number must increase (after decache) |
| * release the defrag_q & prframe |
| */ |
| r8712_free_recvframe(prframe, pfree_recv_queue); |
| r8712_free_recvframe_queue(defrag_q, pfree_recv_queue); |
| return NULL; |
| } |
| curfragnum++; |
| /* copy the 2nd~n fragment frame's payload to the first fragment |
| * get the 2nd~last fragment frame's payload |
| */ |
| wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len; |
| recvframe_pull(pnextrframe, wlanhdr_offset); |
| /* append to first fragment frame's tail (if privacy frame, |
| * pull the ICV) |
| */ |
| recvframe_pull_tail(prframe, pfhdr->attrib.icv_len); |
| memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len); |
| recvframe_put(prframe, pnfhdr->len); |
| pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len; |
| plist = plist->next; |
| } |
| /* free the defrag_q queue and return the prframe */ |
| r8712_free_recvframe_queue(defrag_q, pfree_recv_queue); |
| return prframe; |
| } |
| |
| /* check if need to defrag, if needed queue the frame to defrag_q */ |
| union recv_frame *r8712_recvframe_chk_defrag(struct _adapter *padapter, |
| union recv_frame *precv_frame) |
| { |
| u8 ismfrag; |
| u8 fragnum; |
| u8 *psta_addr; |
| struct recv_frame_hdr *pfhdr; |
| struct sta_info *psta; |
| struct sta_priv *pstapriv; |
| struct list_head *phead; |
| union recv_frame *prtnframe = NULL; |
| struct __queue *pfree_recv_queue, *pdefrag_q; |
| |
| pstapriv = &padapter->stapriv; |
| pfhdr = &precv_frame->u.hdr; |
| pfree_recv_queue = &padapter->recvpriv.free_recv_queue; |
| /* need to define struct of wlan header frame ctrl */ |
| ismfrag = pfhdr->attrib.mfrag; |
| fragnum = pfhdr->attrib.frag_num; |
| psta_addr = pfhdr->attrib.ta; |
| psta = r8712_get_stainfo(pstapriv, psta_addr); |
| if (!psta) |
| pdefrag_q = NULL; |
| else |
| pdefrag_q = &psta->sta_recvpriv.defrag_q; |
| |
| if ((ismfrag == 0) && (fragnum == 0)) |
| prtnframe = precv_frame;/*isn't a fragment frame*/ |
| if (ismfrag == 1) { |
| /* 0~(n-1) fragment frame |
| * enqueue to defraf_g |
| */ |
| if (pdefrag_q != NULL) { |
| if (fragnum == 0) { |
| /*the first fragment*/ |
| if (!list_empty(&pdefrag_q->queue)) { |
| /*free current defrag_q */ |
| r8712_free_recvframe_queue(pdefrag_q, |
| pfree_recv_queue); |
| } |
| } |
| /* Then enqueue the 0~(n-1) fragment to the defrag_q */ |
| phead = &pdefrag_q->queue; |
| list_add_tail(&pfhdr->list, phead); |
| prtnframe = NULL; |
| } else { |
| /* can't find this ta's defrag_queue, so free this |
| * recv_frame |
| */ |
| r8712_free_recvframe(precv_frame, pfree_recv_queue); |
| prtnframe = NULL; |
| } |
| |
| } |
| if ((ismfrag == 0) && (fragnum != 0)) { |
| /* the last fragment frame |
| * enqueue the last fragment |
| */ |
| if (pdefrag_q != NULL) { |
| phead = &pdefrag_q->queue; |
| list_add_tail(&pfhdr->list, phead); |
| /*call recvframe_defrag to defrag*/ |
| precv_frame = recvframe_defrag(padapter, pdefrag_q); |
| prtnframe = precv_frame; |
| } else { |
| /* can't find this ta's defrag_queue, so free this |
| * recv_frame |
| */ |
| r8712_free_recvframe(precv_frame, pfree_recv_queue); |
| prtnframe = NULL; |
| } |
| } |
| if ((prtnframe != NULL) && (prtnframe->u.hdr.attrib.privacy)) { |
| /* after defrag we must check tkip mic code */ |
| if (r8712_recvframe_chkmic(padapter, prtnframe) == _FAIL) { |
| r8712_free_recvframe(prtnframe, pfree_recv_queue); |
| prtnframe = NULL; |
| } |
| } |
| return prtnframe; |
| } |
| |
| static int amsdu_to_msdu(struct _adapter *padapter, union recv_frame *prframe) |
| { |
| int a_len, padding_len; |
| u16 eth_type, nSubframe_Length; |
| u8 nr_subframes, i; |
| unsigned char *pdata; |
| struct rx_pkt_attrib *pattrib; |
| _pkt *sub_skb, *subframes[MAX_SUBFRAME_COUNT]; |
| struct recv_priv *precvpriv = &padapter->recvpriv; |
| struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue); |
| |
| nr_subframes = 0; |
| pattrib = &prframe->u.hdr.attrib; |
| recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen); |
| if (prframe->u.hdr.attrib.iv_len > 0) |
| recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len); |
| a_len = prframe->u.hdr.len; |
| pdata = prframe->u.hdr.rx_data; |
| while (a_len > ETH_HLEN) { |
| /* Offset 12 denote 2 mac address */ |
| nSubframe_Length = *((u16 *)(pdata + 12)); |
| /*==m==>change the length order*/ |
| nSubframe_Length = (nSubframe_Length >> 8) + |
| (nSubframe_Length << 8); |
| if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) { |
| netdev_warn(padapter->pnetdev, "r8712u: nRemain_Length is %d and nSubframe_Length is: %d\n", |
| a_len, nSubframe_Length); |
| goto exit; |
| } |
| /* move the data point to data content */ |
| pdata += ETH_HLEN; |
| a_len -= ETH_HLEN; |
| /* Allocate new skb for releasing to upper layer */ |
| sub_skb = dev_alloc_skb(nSubframe_Length + 12); |
| if (!sub_skb) |
| break; |
| skb_reserve(sub_skb, 12); |
| skb_put_data(sub_skb, pdata, nSubframe_Length); |
| subframes[nr_subframes++] = sub_skb; |
| if (nr_subframes >= MAX_SUBFRAME_COUNT) { |
| netdev_warn(padapter->pnetdev, "r8712u: ParseSubframe(): Too many Subframes! Packets dropped!\n"); |
| break; |
| } |
| pdata += nSubframe_Length; |
| a_len -= nSubframe_Length; |
| if (a_len != 0) { |
| padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & 3); |
| if (padding_len == 4) |
| padding_len = 0; |
| if (a_len < padding_len) |
| goto exit; |
| pdata += padding_len; |
| a_len -= padding_len; |
| } |
| } |
| for (i = 0; i < nr_subframes; i++) { |
| sub_skb = subframes[i]; |
| /* convert hdr + possible LLC headers into Ethernet header */ |
| eth_type = (sub_skb->data[6] << 8) | sub_skb->data[7]; |
| if (sub_skb->len >= 8 && |
| ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) && |
| eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) || |
| !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) { |
| /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| * replace EtherType |
| */ |
| skb_pull(sub_skb, SNAP_SIZE); |
| memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, |
| ETH_ALEN); |
| memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, |
| ETH_ALEN); |
| } else { |
| __be16 len; |
| /* Leave Ethernet header part of hdr and full payload */ |
| len = htons(sub_skb->len); |
| memcpy(skb_push(sub_skb, 2), &len, 2); |
| memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, |
| ETH_ALEN); |
| memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, |
| ETH_ALEN); |
| } |
| /* Indicate the packets to upper layer */ |
| if (sub_skb) { |
| sub_skb->protocol = |
| eth_type_trans(sub_skb, padapter->pnetdev); |
| sub_skb->dev = padapter->pnetdev; |
| if ((pattrib->tcpchk_valid == 1) && |
| (pattrib->tcp_chkrpt == 1)) { |
| sub_skb->ip_summed = CHECKSUM_UNNECESSARY; |
| } else { |
| sub_skb->ip_summed = CHECKSUM_NONE; |
| } |
| netif_rx(sub_skb); |
| } |
| } |
| exit: |
| prframe->u.hdr.len = 0; |
| r8712_free_recvframe(prframe, pfree_recv_queue); |
| return _SUCCESS; |
| } |
| |
| void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf) |
| { |
| __le32 voffset; |
| u8 *poffset; |
| u16 cmd_len, drvinfo_sz; |
| struct recv_stat *prxstat; |
| |
| poffset = prxcmdbuf; |
| voffset = *(__le32 *)poffset; |
| prxstat = prxcmdbuf; |
| drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16; |
| drvinfo_sz <<= 3; |
| poffset += RXDESC_SIZE + drvinfo_sz; |
| do { |
| voffset = *(__le32 *)poffset; |
| cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff); |
| r8712_event_handle(padapter, (__le32 *)poffset); |
| poffset += (cmd_len + 8);/*8 bytes alignment*/ |
| } while (le32_to_cpu(voffset) & BIT(31)); |
| |
| } |
| |
| static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, |
| u16 seq_num) |
| { |
| u8 wsize = preorder_ctrl->wsize_b; |
| u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) % 4096; |
| |
| /* Rx Reorder initialize condition.*/ |
| if (preorder_ctrl->indicate_seq == 0xffff) |
| preorder_ctrl->indicate_seq = seq_num; |
| /* Drop out the packet which SeqNum is smaller than WinStart */ |
| if (SN_LESS(seq_num, preorder_ctrl->indicate_seq)) |
| return false; |
| /* |
| * Sliding window manipulation. Conditions includes: |
| * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 |
| * 2. Incoming SeqNum is larger than the WinEnd => Window shift N |
| */ |
| if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) |
| preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + |
| 1) % 4096; |
| else if (SN_LESS(wend, seq_num)) { |
| if (seq_num >= (wsize - 1)) |
| preorder_ctrl->indicate_seq = seq_num + 1 - wsize; |
| else |
| preorder_ctrl->indicate_seq = 4095 - (wsize - |
| (seq_num + 1)) + 1; |
| } |
| return true; |
| } |
| |
| static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl, |
| union recv_frame *prframe) |
| { |
| struct list_head *phead, *plist; |
| union recv_frame *pnextrframe; |
| struct rx_pkt_attrib *pnextattrib; |
| struct __queue *ppending_recvframe_queue = |
| &preorder_ctrl->pending_recvframe_queue; |
| struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; |
| |
| phead = &ppending_recvframe_queue->queue; |
| plist = phead->next; |
| while (!end_of_queue_search(phead, plist)) { |
| pnextrframe = container_of(plist, union recv_frame, u.list); |
| pnextattrib = &pnextrframe->u.hdr.attrib; |
| if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num)) |
| plist = plist->next; |
| else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num)) |
| return false; |
| else |
| break; |
| } |
| list_del_init(&(prframe->u.hdr.list)); |
| list_add_tail(&(prframe->u.hdr.list), plist); |
| return true; |
| } |
| |
| int r8712_recv_indicatepkts_in_order(struct _adapter *padapter, |
| struct recv_reorder_ctrl *preorder_ctrl, |
| int bforced) |
| { |
| struct list_head *phead, *plist; |
| union recv_frame *prframe; |
| struct rx_pkt_attrib *pattrib; |
| int bPktInBuf = false; |
| struct recv_priv *precvpriv = &padapter->recvpriv; |
| struct __queue *ppending_recvframe_queue = |
| &preorder_ctrl->pending_recvframe_queue; |
| |
| phead = &ppending_recvframe_queue->queue; |
| plist = phead->next; |
| /* Handling some condition for forced indicate case.*/ |
| if (bforced) { |
| if (list_empty(phead)) |
| return true; |
| |
| prframe = container_of(plist, union recv_frame, u.list); |
| pattrib = &prframe->u.hdr.attrib; |
| preorder_ctrl->indicate_seq = pattrib->seq_num; |
| } |
| /* Prepare indication list and indication. |
| * Check if there is any packet need indicate. |
| */ |
| while (!list_empty(phead)) { |
| prframe = container_of(plist, union recv_frame, u.list); |
| pattrib = &prframe->u.hdr.attrib; |
| if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) { |
| plist = plist->next; |
| list_del_init(&(prframe->u.hdr.list)); |
| if (SN_EQUAL(preorder_ctrl->indicate_seq, |
| pattrib->seq_num)) |
| preorder_ctrl->indicate_seq = |
| (preorder_ctrl->indicate_seq + 1) % 4096; |
| /*indicate this recv_frame*/ |
| if (!pattrib->amsdu) { |
| if (!padapter->bDriverStopped && |
| !padapter->bSurpriseRemoved) { |
| /* indicate this recv_frame */ |
| r8712_recv_indicatepkt(padapter, |
| prframe); |
| } |
| } else if (pattrib->amsdu == 1) { |
| if (amsdu_to_msdu(padapter, prframe) != |
| _SUCCESS) |
| r8712_free_recvframe(prframe, |
| &precvpriv->free_recv_queue); |
| } |
| /* Update local variables. */ |
| bPktInBuf = false; |
| } else { |
| bPktInBuf = true; |
| break; |
| } |
| } |
| return bPktInBuf; |
| } |
| |
| static int recv_indicatepkt_reorder(struct _adapter *padapter, |
| union recv_frame *prframe) |
| { |
| unsigned long irql; |
| struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; |
| struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl; |
| struct __queue *ppending_recvframe_queue = |
| &preorder_ctrl->pending_recvframe_queue; |
| |
| if (!pattrib->amsdu) { |
| /* s1. */ |
| r8712_wlanhdr_to_ethhdr(prframe); |
| if (pattrib->qos != 1) { |
| if (!padapter->bDriverStopped && |
| !padapter->bSurpriseRemoved) { |
| r8712_recv_indicatepkt(padapter, prframe); |
| return _SUCCESS; |
| } else { |
| return _FAIL; |
| } |
| } |
| } |
| spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); |
| /*s2. check if winstart_b(indicate_seq) needs to be updated*/ |
| if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) |
| goto _err_exit; |
| /*s3. Insert all packet into Reorder Queue to maintain its ordering.*/ |
| if (!enqueue_reorder_recvframe(preorder_ctrl, prframe)) |
| goto _err_exit; |
| /*s4. |
| * Indication process. |
| * After Packet dropping and Sliding Window shifting as above, we can |
| * now just indicate the packets with the SeqNum smaller than latest |
| * WinStart and buffer other packets. |
| * |
| * For Rx Reorder condition: |
| * 1. All packets with SeqNum smaller than WinStart => Indicate |
| * 2. All packets with SeqNum larger than or equal to |
| * WinStart => Buffer it. |
| */ |
| if (r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, false) == |
| true) { |
| mod_timer(&preorder_ctrl->reordering_ctrl_timer, |
| jiffies + msecs_to_jiffies(REORDER_WAIT_TIME)); |
| spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); |
| } else { |
| spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); |
| del_timer(&preorder_ctrl->reordering_ctrl_timer); |
| } |
| return _SUCCESS; |
| _err_exit: |
| spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); |
| return _FAIL; |
| } |
| |
| void r8712_reordering_ctrl_timeout_handler(void *pcontext) |
| { |
| unsigned long irql; |
| struct recv_reorder_ctrl *preorder_ctrl = pcontext; |
| struct _adapter *padapter = preorder_ctrl->padapter; |
| struct __queue *ppending_recvframe_queue = |
| &preorder_ctrl->pending_recvframe_queue; |
| |
| if (padapter->bDriverStopped || padapter->bSurpriseRemoved) |
| return; |
| spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); |
| r8712_recv_indicatepkts_in_order(padapter, preorder_ctrl, true); |
| spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); |
| } |
| |
| static int r8712_process_recv_indicatepkts(struct _adapter *padapter, |
| union recv_frame *prframe) |
| { |
| int retval = _SUCCESS; |
| struct mlme_priv *pmlmepriv = &padapter->mlmepriv; |
| struct ht_priv *phtpriv = &pmlmepriv->htpriv; |
| |
| if (phtpriv->ht_option == 1) { /*B/G/N Mode*/ |
| if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) { |
| /* including perform A-MPDU Rx Ordering Buffer Control*/ |
| if (!padapter->bDriverStopped && |
| !padapter->bSurpriseRemoved) |
| return _FAIL; |
| } |
| } else { /*B/G mode*/ |
| retval = r8712_wlanhdr_to_ethhdr(prframe); |
| if (retval != _SUCCESS) |
| return retval; |
| if (!padapter->bDriverStopped && !padapter->bSurpriseRemoved) { |
| /* indicate this recv_frame */ |
| r8712_recv_indicatepkt(padapter, prframe); |
| } else { |
| return _FAIL; |
| } |
| } |
| return retval; |
| } |
| |
| static u8 query_rx_pwr_percentage(s8 antpower) |
| { |
| if ((antpower <= -100) || (antpower >= 20)) |
| return 0; |
| else if (antpower >= 0) |
| return 100; |
| else |
| return 100 + antpower; |
| } |
| |
| static u8 evm_db2percentage(s8 value) |
| { |
| /* |
| * -33dB~0dB to 0%~99% |
| */ |
| s8 ret_val; |
| |
| ret_val = value; |
| if (ret_val >= 0) |
| ret_val = 0; |
| if (ret_val <= -33) |
| ret_val = -33; |
| ret_val = -ret_val; |
| ret_val *= 3; |
| if (ret_val == 99) |
| ret_val = 100; |
| return ret_val; |
| } |
| |
| s32 r8712_signal_scale_mapping(s32 cur_sig) |
| { |
| s32 ret_sig; |
| |
| if (cur_sig >= 51 && cur_sig <= 100) |
| ret_sig = 100; |
| else if (cur_sig >= 41 && cur_sig <= 50) |
| ret_sig = 80 + ((cur_sig - 40) * 2); |
| else if (cur_sig >= 31 && cur_sig <= 40) |
| ret_sig = 66 + (cur_sig - 30); |
| else if (cur_sig >= 21 && cur_sig <= 30) |
| ret_sig = 54 + (cur_sig - 20); |
| else if (cur_sig >= 10 && cur_sig <= 20) |
| ret_sig = 42 + (((cur_sig - 10) * 2) / 3); |
| else if (cur_sig >= 5 && cur_sig <= 9) |
| ret_sig = 22 + (((cur_sig - 5) * 3) / 2); |
| else if (cur_sig >= 1 && cur_sig <= 4) |
| ret_sig = 6 + (((cur_sig - 1) * 3) / 2); |
| else |
| ret_sig = cur_sig; |
| return ret_sig; |
| } |
| |
| static s32 translate2dbm(struct _adapter *padapter, u8 signal_strength_idx) |
| { |
| s32 signal_power; /* in dBm.*/ |
| /* Translate to dBm (x=0.5y-95).*/ |
| signal_power = (s32)((signal_strength_idx + 1) >> 1); |
| signal_power -= 95; |
| return signal_power; |
| } |
| |
| static void query_rx_phy_status(struct _adapter *padapter, |
| union recv_frame *prframe) |
| { |
| u8 i, max_spatial_stream, evm; |
| struct recv_stat *prxstat = (struct recv_stat *)prframe->u.hdr.rx_head; |
| struct phy_stat *pphy_stat = (struct phy_stat *)(prxstat + 1); |
| u8 *pphy_head = (u8 *)(prxstat + 1); |
| s8 rx_pwr[4], rx_pwr_all; |
| u8 pwdb_all; |
| u32 rssi, total_rssi = 0; |
| u8 bcck_rate = 0, rf_rx_num = 0, cck_highpwr = 0; |
| struct phy_cck_rx_status *pcck_buf; |
| u8 sq; |
| |
| /* Record it for next packet processing*/ |
| bcck_rate = (prframe->u.hdr.attrib.mcs_rate <= 3 ? 1 : 0); |
| if (bcck_rate) { |
| u8 report; |
| |
| /* CCK Driver info Structure is not the same as OFDM packet.*/ |
| pcck_buf = (struct phy_cck_rx_status *)pphy_stat; |
| /* (1)Hardware does not provide RSSI for CCK |
| * (2)PWDB, Average PWDB calculated by hardware |
| * (for rate adaptive) |
| */ |
| if (!cck_highpwr) { |
| report = pcck_buf->cck_agc_rpt & 0xc0; |
| report >>= 6; |
| switch (report) { |
| /* Modify the RF RNA gain value to -40, -20, |
| * -2, 14 by Jenyu's suggestion |
| * Note: different RF with the different |
| * RNA gain. |
| */ |
| case 0x3: |
| rx_pwr_all = -40 - (pcck_buf->cck_agc_rpt & |
| 0x3e); |
| break; |
| case 0x2: |
| rx_pwr_all = -20 - (pcck_buf->cck_agc_rpt & |
| 0x3e); |
| break; |
| case 0x1: |
| rx_pwr_all = -2 - (pcck_buf->cck_agc_rpt & |
| 0x3e); |
| break; |
| case 0x0: |
| rx_pwr_all = 14 - (pcck_buf->cck_agc_rpt & |
| 0x3e); |
| break; |
| } |
| } else { |
| report = ((u8)(le32_to_cpu(pphy_stat->phydw1) >> 8)) & |
| 0x60; |
| report >>= 5; |
| switch (report) { |
| case 0x3: |
| rx_pwr_all = -40 - ((pcck_buf->cck_agc_rpt & |
| 0x1f) << 1); |
| break; |
| case 0x2: |
| rx_pwr_all = -20 - ((pcck_buf->cck_agc_rpt & |
| 0x1f) << 1); |
| break; |
| case 0x1: |
| rx_pwr_all = -2 - ((pcck_buf->cck_agc_rpt & |
| 0x1f) << 1); |
| break; |
| case 0x0: |
| rx_pwr_all = 14 - ((pcck_buf->cck_agc_rpt & |
| 0x1f) << 1); |
| break; |
| } |
| } |
| pwdb_all = query_rx_pwr_percentage(rx_pwr_all); |
| /* CCK gain is smaller than OFDM/MCS gain,*/ |
| /* so we add gain diff by experiences, the val is 6 */ |
| pwdb_all += 6; |
| if (pwdb_all > 100) |
| pwdb_all = 100; |
| /* modify the offset to make the same gain index with OFDM.*/ |
| if (pwdb_all > 34 && pwdb_all <= 42) |
| pwdb_all -= 2; |
| else if (pwdb_all > 26 && pwdb_all <= 34) |
| pwdb_all -= 6; |
| else if (pwdb_all > 14 && pwdb_all <= 26) |
| pwdb_all -= 8; |
| else if (pwdb_all > 4 && pwdb_all <= 14) |
| pwdb_all -= 4; |
| /* |
| * (3) Get Signal Quality (EVM) |
| */ |
| if (pwdb_all > 40) { |
| sq = 100; |
| } else { |
| sq = pcck_buf->sq_rpt; |
| if (pcck_buf->sq_rpt > 64) |
| sq = 0; |
| else if (pcck_buf->sq_rpt < 20) |
| sq = 100; |
| else |
| sq = ((64 - sq) * 100) / 44; |
| } |
| prframe->u.hdr.attrib.signal_qual = sq; |
| prframe->u.hdr.attrib.rx_mimo_signal_qual[0] = sq; |
| prframe->u.hdr.attrib.rx_mimo_signal_qual[1] = -1; |
| } else { |
| /* (1)Get RSSI for HT rate */ |
| for (i = 0; i < ((padapter->registrypriv.rf_config) & |
| 0x0f); i++) { |
| rf_rx_num++; |
| rx_pwr[i] = ((pphy_head[PHY_STAT_GAIN_TRSW_SHT + i] |
| & 0x3F) * 2) - 110; |
| /* Translate DBM to percentage. */ |
| rssi = query_rx_pwr_percentage(rx_pwr[i]); |
| total_rssi += rssi; |
| } |
| /* (2)PWDB, Average PWDB calculated by hardware (for |
| * rate adaptive) |
| */ |
| rx_pwr_all = (((pphy_head[PHY_STAT_PWDB_ALL_SHT]) >> 1) & 0x7f) |
| - 106; |
| pwdb_all = query_rx_pwr_percentage(rx_pwr_all); |
| |
| { |
| /* (3)EVM of HT rate */ |
| if (prframe->u.hdr.attrib.htc && |
| prframe->u.hdr.attrib.mcs_rate >= 20 && |
| prframe->u.hdr.attrib.mcs_rate <= 27) { |
| /* both spatial stream make sense */ |
| max_spatial_stream = 2; |
| } else { |
| /* only spatial stream 1 makes sense */ |
| max_spatial_stream = 1; |
| } |
| for (i = 0; i < max_spatial_stream; i++) { |
| evm = evm_db2percentage((pphy_head |
| [PHY_STAT_RXEVM_SHT + i]));/*dbm*/ |
| prframe->u.hdr.attrib.signal_qual = |
| (u8)(evm & 0xff); |
| prframe->u.hdr.attrib.rx_mimo_signal_qual[i] = |
| (u8)(evm & 0xff); |
| } |
| } |
| } |
| /* UI BSS List signal strength(in percentage), make it good looking, |
| * from 0~100. It is assigned to the BSS List in |
| * GetValueFromBeaconOrProbeRsp(). |
| */ |
| if (bcck_rate) |
| prframe->u.hdr.attrib.signal_strength = |
| (u8)r8712_signal_scale_mapping(pwdb_all); |
| else { |
| if (rf_rx_num != 0) |
| prframe->u.hdr.attrib.signal_strength = |
| (u8)(r8712_signal_scale_mapping(total_rssi /= |
| rf_rx_num)); |
| } |
| } |
| |
| static void process_link_qual(struct _adapter *padapter, |
| union recv_frame *prframe) |
| { |
| u32 last_evm = 0, tmpVal; |
| struct rx_pkt_attrib *pattrib; |
| |
| if (prframe == NULL || padapter == NULL) |
| return; |
| pattrib = &prframe->u.hdr.attrib; |
| if (pattrib->signal_qual != 0) { |
| /* |
| * 1. Record the general EVM to the sliding window. |
| */ |
| if (padapter->recvpriv.signal_qual_data.total_num++ >= |
| PHY_LINKQUALITY_SLID_WIN_MAX) { |
| padapter->recvpriv.signal_qual_data.total_num = |
| PHY_LINKQUALITY_SLID_WIN_MAX; |
| last_evm = padapter->recvpriv.signal_qual_data.elements |
| [padapter->recvpriv.signal_qual_data.index]; |
| padapter->recvpriv.signal_qual_data.total_val -= |
| last_evm; |
| } |
| padapter->recvpriv.signal_qual_data.total_val += |
| pattrib->signal_qual; |
| padapter->recvpriv.signal_qual_data.elements[padapter-> |
| recvpriv.signal_qual_data.index++] = |
| pattrib->signal_qual; |
| if (padapter->recvpriv.signal_qual_data.index >= |
| PHY_LINKQUALITY_SLID_WIN_MAX) |
| padapter->recvpriv.signal_qual_data.index = 0; |
| |
| /* <1> Showed on UI for user, in percentage. */ |
| tmpVal = padapter->recvpriv.signal_qual_data.total_val / |
| padapter->recvpriv.signal_qual_data.total_num; |
| padapter->recvpriv.signal = (u8)tmpVal; |
| } |
| } |
| |
| static void process_rssi(struct _adapter *padapter, union recv_frame *prframe) |
| { |
| u32 last_rssi, tmp_val; |
| struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; |
| |
| if (padapter->recvpriv.signal_strength_data.total_num++ >= |
| PHY_RSSI_SLID_WIN_MAX) { |
| padapter->recvpriv.signal_strength_data.total_num = |
| PHY_RSSI_SLID_WIN_MAX; |
| last_rssi = padapter->recvpriv.signal_strength_data.elements |
| [padapter->recvpriv.signal_strength_data.index]; |
| padapter->recvpriv.signal_strength_data.total_val -= last_rssi; |
| } |
| padapter->recvpriv.signal_strength_data.total_val += |
| pattrib->signal_strength; |
| padapter->recvpriv.signal_strength_data.elements[padapter->recvpriv. |
| signal_strength_data.index++] = |
| pattrib->signal_strength; |
| if (padapter->recvpriv.signal_strength_data.index >= |
| PHY_RSSI_SLID_WIN_MAX) |
| padapter->recvpriv.signal_strength_data.index = 0; |
| tmp_val = padapter->recvpriv.signal_strength_data.total_val / |
| padapter->recvpriv.signal_strength_data.total_num; |
| padapter->recvpriv.rssi = (s8)translate2dbm(padapter, (u8)tmp_val); |
| } |
| |
| static void process_phy_info(struct _adapter *padapter, |
| union recv_frame *prframe) |
| { |
| query_rx_phy_status(padapter, prframe); |
| process_rssi(padapter, prframe); |
| process_link_qual(padapter, prframe); |
| } |
| |
| int recv_func(struct _adapter *padapter, void *pcontext) |
| { |
| struct rx_pkt_attrib *pattrib; |
| union recv_frame *prframe, *orig_prframe; |
| int retval = _SUCCESS; |
| struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue; |
| struct mlme_priv *pmlmepriv = &padapter->mlmepriv; |
| |
| prframe = pcontext; |
| orig_prframe = prframe; |
| pattrib = &prframe->u.hdr.attrib; |
| if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) { |
| if (pattrib->crc_err == 1) |
| padapter->mppriv.rx_crcerrpktcount++; |
| else |
| padapter->mppriv.rx_pktcount++; |
| if (!check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE)) { |
| /* free this recv_frame */ |
| r8712_free_recvframe(orig_prframe, pfree_recv_queue); |
| goto _exit_recv_func; |
| } |
| } |
| /* check the frame crtl field and decache */ |
| retval = r8712_validate_recv_frame(padapter, prframe); |
| if (retval != _SUCCESS) { |
| /* free this recv_frame */ |
| r8712_free_recvframe(orig_prframe, pfree_recv_queue); |
| goto _exit_recv_func; |
| } |
| process_phy_info(padapter, prframe); |
| prframe = r8712_decryptor(padapter, prframe); |
| if (!prframe) { |
| retval = _FAIL; |
| goto _exit_recv_func; |
| } |
| prframe = r8712_recvframe_chk_defrag(padapter, prframe); |
| if (!prframe) |
| goto _exit_recv_func; |
| prframe = r8712_portctrl(padapter, prframe); |
| if (!prframe) { |
| retval = _FAIL; |
| goto _exit_recv_func; |
| } |
| retval = r8712_process_recv_indicatepkts(padapter, prframe); |
| if (retval != _SUCCESS) { |
| r8712_free_recvframe(orig_prframe, pfree_recv_queue); |
| goto _exit_recv_func; |
| } |
| _exit_recv_func: |
| return retval; |
| } |
| |
| static int recvbuf2recvframe(struct _adapter *padapter, struct sk_buff *pskb) |
| { |
| u8 *pbuf, shift_sz = 0; |
| u8 frag, mf; |
| uint pkt_len; |
| u32 transfer_len; |
| struct recv_stat *prxstat; |
| u16 pkt_cnt, drvinfo_sz, pkt_offset, tmp_len, alloc_sz; |
| struct __queue *pfree_recv_queue; |
| _pkt *pkt_copy = NULL; |
| union recv_frame *precvframe = NULL; |
| struct recv_priv *precvpriv = &padapter->recvpriv; |
| |
| pfree_recv_queue = &(precvpriv->free_recv_queue); |
| pbuf = pskb->data; |
| prxstat = (struct recv_stat *)pbuf; |
| pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff; |
| pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff; |
| transfer_len = pskb->len; |
| /* Test throughput with Netgear 3700 (No security) with Chariot 3T3R |
| * pairs. The packet count will be a big number so that the containing |
| * packet will effect the Rx reordering. |
| */ |
| if (transfer_len < pkt_len) { |
| /* In this case, it means the MAX_RECVBUF_SZ is too small to |
| * get the data from 8712u. |
| */ |
| return _FAIL; |
| } |
| do { |
| prxstat = (struct recv_stat *)pbuf; |
| pkt_len = le32_to_cpu(prxstat->rxdw0) & 0x00003fff; |
| /* more fragment bit */ |
| mf = (le32_to_cpu(prxstat->rxdw1) >> 27) & 0x1; |
| /* ragmentation number */ |
| frag = (le32_to_cpu(prxstat->rxdw2) >> 12) & 0xf; |
| /* uint 2^3 = 8 bytes */ |
| drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16; |
| drvinfo_sz <<= 3; |
| if (pkt_len <= 0) |
| goto _exit_recvbuf2recvframe; |
| /* Qos data, wireless lan header length is 26 */ |
| if ((le32_to_cpu(prxstat->rxdw0) >> 23) & 0x01) |
| shift_sz = 2; |
| precvframe = r8712_alloc_recvframe(pfree_recv_queue); |
| if (!precvframe) |
| goto _exit_recvbuf2recvframe; |
| INIT_LIST_HEAD(&precvframe->u.hdr.list); |
| precvframe->u.hdr.precvbuf = NULL; /*can't access the precvbuf*/ |
| precvframe->u.hdr.len = 0; |
| tmp_len = pkt_len + drvinfo_sz + RXDESC_SIZE; |
| pkt_offset = (u16)round_up(tmp_len, 128); |
| /* for first fragment packet, driver need allocate 1536 + |
| * drvinfo_sz + RXDESC_SIZE to defrag packet. |
| */ |
| if ((mf == 1) && (frag == 0)) |
| /*1658+6=1664, 1664 is 128 alignment.*/ |
| alloc_sz = max_t(u16, tmp_len, 1658); |
| else |
| alloc_sz = tmp_len; |
| /* 2 is for IP header 4 bytes alignment in QoS packet case. |
| * 4 is for skb->data 4 bytes alignment. |
| */ |
| alloc_sz += 6; |
| pkt_copy = netdev_alloc_skb(padapter->pnetdev, alloc_sz); |
| if (pkt_copy) { |
| precvframe->u.hdr.pkt = pkt_copy; |
| skb_reserve(pkt_copy, 4 - ((addr_t)(pkt_copy->data) |
| % 4)); |
| skb_reserve(pkt_copy, shift_sz); |
| memcpy(pkt_copy->data, pbuf, tmp_len); |
| precvframe->u.hdr.rx_head = precvframe->u.hdr.rx_data = |
| precvframe->u.hdr.rx_tail = pkt_copy->data; |
| precvframe->u.hdr.rx_end = pkt_copy->data + alloc_sz; |
| } else { |
| precvframe->u.hdr.pkt = skb_clone(pskb, GFP_ATOMIC); |
| if (!precvframe->u.hdr.pkt) |
| return _FAIL; |
| precvframe->u.hdr.rx_head = pbuf; |
| precvframe->u.hdr.rx_data = pbuf; |
| precvframe->u.hdr.rx_tail = pbuf; |
| precvframe->u.hdr.rx_end = pbuf + alloc_sz; |
| } |
| recvframe_put(precvframe, tmp_len); |
| recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE); |
| /* because the endian issue, driver avoid reference to the |
| * rxstat after calling update_recvframe_attrib_from_recvstat(); |
| */ |
| update_recvframe_attrib_from_recvstat(&precvframe->u.hdr.attrib, |
| prxstat); |
| r8712_recv_entry(precvframe); |
| transfer_len -= pkt_offset; |
| pbuf += pkt_offset; |
| pkt_cnt--; |
| precvframe = NULL; |
| pkt_copy = NULL; |
| } while ((transfer_len > 0) && pkt_cnt > 0); |
| _exit_recvbuf2recvframe: |
| return _SUCCESS; |
| } |
| |
| static void recv_tasklet(void *priv) |
| { |
| struct sk_buff *pskb; |
| struct _adapter *padapter = priv; |
| struct recv_priv *precvpriv = &padapter->recvpriv; |
| |
| while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) { |
| recvbuf2recvframe(padapter, pskb); |
| skb_reset_tail_pointer(pskb); |
| pskb->len = 0; |
| if (!skb_cloned(pskb)) |
| skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb); |
| else |
| consume_skb(pskb); |
| } |
| } |