/****************************************************************************** * 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 "osdep_service.h" #include "drv_types.h" #include "recv_osdep.h" #include "mlme_osdep.h" #include "ip.h" #include "if_ether.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; sema_init(&precvpriv->recv_sema, 0); sema_init(&precvpriv->terminate_recvthread_sema, 0); /*init recv_buf*/ _init_queue(&precvpriv->free_recv_buf_queue); precvpriv->pallocated_recv_buf = _malloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4); if (precvpriv->pallocated_recv_buf == NULL) return _FAIL; memset(precvpriv->pallocated_recv_buf, 0, NR_RECVBUFF * sizeof(struct recv_buf) + 4); 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_listhead(&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_insert_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) { pskb->dev = padapter->pnetdev; 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)) printk(KERN_WARNING "r8712u: rx_skb_queue not empty\n"); skb_queue_purge(&precvpriv->free_recv_skb_queue); if (skb_queue_len(&precvpriv->free_recv_skb_queue)) printk(KERN_WARNING "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) { int res = _SUCCESS; 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 res; } 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_delete(&(precvframe->u.hdr.list)); list_insert_tail(&(precvframe->u.hdr.list), get_list_head(pfree_recv_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) { u32 *pphy_info; struct phy_stat *pphy_stat; u16 drvinfo_sz = 0; drvinfo_sz = (le32_to_cpu(prxstat->rxdw0)&0x000f0000)>>16; drvinfo_sz = 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*/ if (drvinfo_sz) { pphy_stat = (struct phy_stat *)(prxstat+1); pphy_info = (u32 *)prxstat+1; } } /*perform defrag*/ static union recv_frame *recvframe_defrag(struct _adapter *adapter, struct __queue *defrag_q) { struct list_head *plist, *phead; u8 *data, 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 = get_list_head(defrag_q); plist = get_next(phead); prframe = LIST_CONTAINOR(plist, union recv_frame, u); list_delete(&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 = get_list_head(defrag_q); plist = get_next(plist); data = get_recvframe_data(prframe); while (end_of_queue_search(phead, plist) == false) { pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u); 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 = get_next(plist); } /* 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 == NULL) 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 (_queue_empty(pdefrag_q) == false) { /*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 = get_list_head(pdefrag_q); list_insert_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 = get_list_head(pdefrag_q); list_insert_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 *data_ptr, *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); int ret = _SUCCESS; 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)) { printk(KERN_WARNING "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); skb_reserve(sub_skb, 12); data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length); memcpy(data_ptr, pdata, nSubframe_Length); subframes[nr_subframes++] = sub_skb; if (nr_subframes >= MAX_SUBFRAME_COUNT) { printk(KERN_WARNING "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 { u16 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 ret; } void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf) { uint voffset; u8 *poffset; u16 pkt_len, cmd_len, drvinfo_sz; u8 eid, cmd_seq; struct recv_stat *prxstat; poffset = (u8 *)prxcmdbuf; voffset = *(uint *)poffset; pkt_len = le32_to_cpu(voffset) & 0x00003fff; prxstat = (struct recv_stat *)prxcmdbuf; drvinfo_sz = ((le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16); drvinfo_sz = drvinfo_sz << 3; poffset += RXDESC_SIZE + drvinfo_sz; do { voffset = *(uint *)poffset; cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff); cmd_seq = (u8)((le32_to_cpu(voffset) >> 24) & 0x7f); eid = (u8)((le32_to_cpu(voffset) >> 16) & 0xff); r8712_event_handle(padapter, (uint *)poffset); poffset += (cmd_len + 8);/*8 bytes aligment*/ } 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 = get_list_head(ppending_recvframe_queue); plist = get_next(phead); while (end_of_queue_search(phead, plist) == false) { pnextrframe = LIST_CONTAINOR(plist, union recv_frame, u); pnextattrib = &pnextrframe->u.hdr.attrib; if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num)) plist = get_next(plist); else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num)) return false; else break; } list_delete(&(prframe->u.hdr.list)); list_insert_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 = get_list_head(ppending_recvframe_queue); plist = get_next(phead); /* Handling some condition for forced indicate case.*/ if (bforced == true) { if (is_list_empty(phead)) return true; else { prframe = LIST_CONTAINOR(plist, union recv_frame, u); 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 (!is_list_empty(phead)) { prframe = LIST_CONTAINOR(plist, union recv_frame, u); pattrib = &prframe->u.hdr.attrib; if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) { plist = get_next(plist); list_delete(&(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 == false) && (padapter->bSurpriseRemoved == false)) { /* 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 == false) && (padapter->bSurpriseRemoved == false)) { 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 been 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) { _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME); spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); } else { spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); _cancel_timer_ex(&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 = (struct recv_reorder_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 == false) && (padapter->bSurpriseRemoved == false)) return _FAIL; } } else { /*B/G mode*/ retval = r8712_wlanhdr_to_ethhdr(prframe); if (retval != _SUCCESS) return retval; if ((padapter->bDriverStopped == false) && (padapter->bSurpriseRemoved == false)) { /* 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 cacluated by hardware * (for rate adaptive) */ if (!cck_highpwr) { report = pcck_buf->cck_agc_rpt & 0xc0; report = 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 = 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 cacluated 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 = (union recv_frame *)pcontext; orig_prframe = prframe; pattrib = &prframe->u.hdr.attrib; if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) { if (pattrib->crc_err == 1) padapter->mppriv.rx_crcerrpktcount++; else padapter->mppriv.rx_pktcount++; if (check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE) == false) { /* 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 == NULL) { retval = _FAIL; goto _exit_recv_func; } prframe = r8712_recvframe_chk_defrag(padapter, prframe); if (prframe == NULL) goto _exit_recv_func; prframe = r8712_portctrl(padapter, prframe); if (prframe == NULL) { 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 = 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 == NULL) goto _exit_recvbuf2recvframe; _init_listhead(&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)_RND128(tmp_len); /* for first fragment packet, driver need allocate 1536 + * drvinfo_sz + RXDESC_SIZE to defrag packet. */ if ((mf == 1) && (frag == 0)) alloc_sz = 1658;/*1658+6=1664, 1664 is 128 alignment.*/ 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) { pkt_copy->dev = padapter->pnetdev; 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); 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 = (struct _adapter *)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; skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb); } }