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         int i;
  83         struct ethhdr etherhdr;
  84         struct iphdr ip_hdr;
  85         u16 UserPriority = 0;
  86
  87         _r8712_open_pktfile(ppktfile->pkt, ppktfile);
  88         _r8712_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);
  89
  90         /* get UserPriority from IP hdr*/
  91         if (pattrib->ether_type == 0x0800) {
  92                 i = _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr,
  93                                         sizeof(ip_hdr));
  94                 /*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
  95                 UserPriority = ip_hdr.tos >> 5;
  96         } else {
  97                 /* "When priority processing of data frames is supported,
  98                  * a STA's SME should send EAPOL-Key frames at the highest
  99                  * priority." */
 100
 101                 if (pattrib->ether_type == 0x888e)
 102                         UserPriority = 7;
 103         }
 104         pattrib->priority = UserPriority;
 105         pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
 106         pattrib->subtype = WIFI_QOS_DATA_TYPE;
 107 }
 108
 109 void r8712_SetFilter(struct work_struct *work)
 110 {
 111         struct _adapter *padapter = container_of(work, struct _adapter,
 112                                                 wkFilterRxFF0);
 113         u8  oldvalue = 0x00, newvalue = 0x00;
 114         unsigned long irqL;
 115
 116         oldvalue = r8712_read8(padapter, 0x117);
 117         newvalue = oldvalue & 0xfe;
 118         r8712_write8(padapter, 0x117, newvalue);
 119
 120         spin_lock_irqsave(&padapter->lockRxFF0Filter, irqL);
 121         padapter->blnEnableRxFF0Filter = 1;
 122         spin_unlock_irqrestore(&padapter->lockRxFF0Filter, irqL);
 123         do {
 124                 msleep(100);
 125         } while (padapter->blnEnableRxFF0Filter == 1);
 126         r8712_write8(padapter, 0x117, oldvalue);
 127 }
 128
 129 int r8712_xmit_resource_alloc(struct _adapter *padapter,
 130                               struct xmit_buf *pxmitbuf)
 131 {
 132         int i;
 133
 134         for (i = 0; i < 8; i++) {
 135                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 136                 if (pxmitbuf->pxmit_urb[i] == NULL) {
 137                         netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
 138                         return _FAIL;
 139                 }
 140         }
 141         return _SUCCESS;
 142 }
 143
 144 void r8712_xmit_resource_free(struct _adapter *padapter,
 145                               struct xmit_buf *pxmitbuf)
 146 {
 147         int i;
 148
 149         for (i = 0; i < 8; i++) {
 150                 if (pxmitbuf->pxmit_urb[i]) {
 151                         usb_kill_urb(pxmitbuf->pxmit_urb[i]);
 152                         usb_free_urb(pxmitbuf->pxmit_urb[i]);
 153                 }
 154         }
 155 }
 156
 157 void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
 158 {
 159         if (pxframe->pkt)
 160                 dev_kfree_skb_any(pxframe->pkt);
 161         pxframe->pkt = NULL;
 162 }
 163
 164 int r8712_xmit_entry(_pkt *pkt, struct  net_device *pnetdev)
 165 {
 166         struct xmit_frame *pxmitframe = NULL;
 167         struct _adapter *padapter = (struct _adapter *)netdev_priv(pnetdev);
 168         struct xmit_priv *pxmitpriv = &(padapter->xmitpriv);
 169         int ret = 0;
 170
 171         if (r8712_if_up(padapter) == false) {
 172                 ret = 0;
 173                 goto _xmit_entry_drop;
 174         }
 175         pxmitframe = r8712_alloc_xmitframe(pxmitpriv);
 176         if (pxmitframe == NULL) {
 177                 ret = 0;
 178                 goto _xmit_entry_drop;
 179         }
 180         if ((!r8712_update_attrib(padapter, pkt, &pxmitframe->attrib))) {
 181                 ret = 0;
 182                 goto _xmit_entry_drop;
 183         }
 184         padapter->ledpriv.LedControlHandler(padapter, LED_CTL_TX);
 185         pxmitframe->pkt = pkt;
 186         if (r8712_pre_xmit(padapter, pxmitframe) == true) {
 187                 /*dump xmitframe directly or drop xframe*/
 188                 dev_kfree_skb_any(pkt);
 189                 pxmitframe->pkt = NULL;
 190         }
 191         pxmitpriv->tx_pkts++;
 192         pxmitpriv->tx_bytes += pxmitframe->attrib.last_txcmdsz;
 193         return ret;
 194 _xmit_entry_drop:
 195         if (pxmitframe)
 196                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 197         pxmitpriv->tx_drop++;
 198         dev_kfree_skb_any(pkt);
 199         return ret;
 200 }