drivers/staging/rtl8712/xmit_linux.c

   1 /******************************************************************************
   2  * xmit_linux.c
   3  *
   4  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
   5  * Linux device driver for RTL8192SU
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  19  *
  20  * Modifications for inclusion into the Linux staging tree are
  21  * Copyright(c) 2010 Larry Finger. All rights reserved.
  22  *
  23  * Contact information:
  24  * WLAN FAE <wlanfae@realtek.com>
  25  * Larry Finger <Larry.Finger@lwfinger.net>
  26  *
  27  ******************************************************************************/
  28
  29 #define _XMIT_OSDEP_C_
  30
  31 #include <linux/usb.h>
  32 #include <linux/ip.h>
  33 #include <linux/if_ether.h>
  34
  35 #include "osdep_service.h"
  36 #include "drv_types.h"
  37
  38 #include "wifi.h"
  39 #include "mlme_osdep.h"
  40 #include "xmit_osdep.h"
  41 #include "osdep_intf.h"
  42
  43 static uint remainder_len(struct pkt_file *pfile)
  44 {
  45         return (uint)(pfile->buf_len - ((addr_t)(pfile->cur_addr) -
  46                (addr_t)(pfile->buf_start)));
  47 }
  48
  49 void _r8712_open_pktfile(_pkt *pktptr, struct pkt_file *pfile)
  50 {
  51         pfile->pkt = pktptr;
  52         pfile->cur_addr = pfile->buf_start = pktptr->data;
  53         pfile->pkt_len = pfile->buf_len = pktptr->len;
  54         pfile->cur_buffer = pfile->buf_start;
  55 }
  56
  57 uint _r8712_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
  58 {
  59         uint len;
  60
  61         len = remainder_len(pfile);
  62         len = (rlen > len) ? len : rlen;
  63         if (rmem)
  64                 skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len,
  65                               rmem, len);
  66         pfile->cur_addr += len;
  67         pfile->pkt_len -= len;
  68         return len;
  69 }
  70
  71 sint r8712_endofpktfile(struct pkt_file *pfile)
  72 {
  73         if (pfile->pkt_len == 0)
  74                 return true;
  75         else
  76                 return false;
  77 }
  78
  79
  80 void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
  81 {
  82         struct ethhdr etherhdr;
  83         struct iphdr ip_hdr;
  84         u16 UserPriority = 0;
  85
  86         _r8712_open_pktfile(ppktfile->pkt, ppktfile);
  87         _r8712_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);
  88
  89         /* get UserPriority from IP hdr*/
  90         if (pattrib->ether_type == 0x0800) {
  91                 _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
  92                 /*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
  93                 UserPriority = ip_hdr.tos >> 5;
  94         } else {
  95                 /* "When priority processing of data frames is supported,
  96                  * a STA's SME should send EAPOL-Key frames at the highest
  97                  * priority." */
  98
  99                 if (pattrib->ether_type == 0x888e)
 100                         UserPriority = 7;
 101         }
 102         pattrib->priority = UserPriority;
 103         pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
 104         pattrib->subtype = WIFI_QOS_DATA_TYPE;
 105 }
 106
 107 void r8712_SetFilter(struct work_struct *work)
 108 {
 109         struct _adapter *padapter = container_of(work, struct _adapter,
 110                                                 wkFilterRxFF0);
 111         u8  oldvalue = 0x00, newvalue = 0x00;
 112         unsigned long irqL;
 113
 114         oldvalue = r8712_read8(padapter, 0x117);
 115         newvalue = oldvalue & 0xfe;
 116         r8712_write8(padapter, 0x117, newvalue);
 117
 118         spin_lock_irqsave(&padapter->lockRxFF0Filter, irqL);
 119         padapter->blnEnableRxFF0Filter = 1;
 120         spin_unlock_irqrestore(&padapter->lockRxFF0Filter, irqL);
 121         do {
 122                 msleep(100);
 123         } while (padapter->blnEnableRxFF0Filter == 1);
 124         r8712_write8(padapter, 0x117, oldvalue);
 125 }
 126
 127 int r8712_xmit_resource_alloc(struct _adapter *padapter,
 128                               struct xmit_buf *pxmitbuf)
 129 {
 130         int i;
 131
 132         for (i = 0; i < 8; i++) {
 133                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 134                 if (pxmitbuf->pxmit_urb[i] == NULL) {
 135                         netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
 136                         return _FAIL;
 137                 }
 138         }
 139         return _SUCCESS;
 140 }
 141
 142 void r8712_xmit_resource_free(struct _adapter *padapter,
 143                               struct xmit_buf *pxmitbuf)
 144 {
 145         int i;
 146
 147         for (i = 0; i < 8; i++) {
 148                 if (pxmitbuf->pxmit_urb[i]) {
 149                         usb_kill_urb(pxmitbuf->pxmit_urb[i]);
 150                         usb_free_urb(pxmitbuf->pxmit_urb[i]);
 151                 }
 152         }
 153 }
 154
 155 void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
 156 {
 157         if (pxframe->pkt)
 158                 dev_kfree_skb_any(pxframe->pkt);
 159         pxframe->pkt = NULL;
 160 }
 161
 162 int r8712_xmit_entry(_pkt *pkt, struct  net_device *pnetdev)
 163 {
 164         struct xmit_frame *pxmitframe = NULL;
 165         struct _adapter *padapter = (struct _adapter *)netdev_priv(pnetdev);
 166         struct xmit_priv *pxmitpriv = &(padapter->xmitpriv);
 167         int ret = 0;
 168
 169         if (r8712_if_up(padapter) == false) {
 170                 ret = 0;
 171                 goto _xmit_entry_drop;
 172         }
 173         pxmitframe = r8712_alloc_xmitframe(pxmitpriv);
 174         if (pxmitframe == NULL) {
 175                 ret = 0;
 176                 goto _xmit_entry_drop;
 177         }
 178         if ((!r8712_update_attrib(padapter, pkt, &pxmitframe->attrib))) {
 179                 ret = 0;
 180                 goto _xmit_entry_drop;
 181         }
 182         padapter->ledpriv.LedControlHandler(padapter, LED_CTL_TX);
 183         pxmitframe->pkt = pkt;
 184         if (r8712_pre_xmit(padapter, pxmitframe) == true) {
 185                 /*dump xmitframe directly or drop xframe*/
 186                 dev_kfree_skb_any(pkt);
 187                 pxmitframe->pkt = NULL;
 188         }
 189         pxmitpriv->tx_pkts++;
 190         pxmitpriv->tx_bytes += pxmitframe->attrib.last_txcmdsz;
 191         return ret;
 192 _xmit_entry_drop:
 193         if (pxmitframe)
 194                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 195         pxmitpriv->tx_drop++;
 196         dev_kfree_skb_any(pkt);
 197         return ret;
 198 }