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- /******************************************************************************
- * 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 == NULL)
- 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 = LIST_CONTAINOR(plist, union recv_frame, u);
- 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 = 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 = 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 == 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 (!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 *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);
- 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);
- 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) {
- 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 {
- 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 _SUCCESS;
- }
- void r8712_rxcmd_event_hdl(struct _adapter *padapter, void *prxcmdbuf)
- {
- uint voffset;
- u8 *poffset;
- u16 cmd_len, drvinfo_sz;
- struct recv_stat *prxstat;
- poffset = (u8 *)prxcmdbuf;
- voffset = *(uint *)poffset;
- prxstat = (struct recv_stat *)prxcmdbuf;
- drvinfo_sz = (le32_to_cpu(prxstat->rxdw0) & 0x000f0000) >> 16;
- drvinfo_sz <<= 3;
- poffset += RXDESC_SIZE + drvinfo_sz;
- do {
- voffset = *(uint *)poffset;
- cmd_len = (u16)(le32_to_cpu(voffset) & 0xffff);
- r8712_event_handle(padapter, (uint *)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 = LIST_CONTAINOR(plist, union recv_frame, u);
- 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 = 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 (!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 = 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 =
- (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 &&
- !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 cacluated 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 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)) {
- 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 == 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 <<= 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_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 = (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;
- if (!skb_cloned(pskb))
- skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
- else
- consume_skb(pskb);
- }
- }
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