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 <[email protected]>
  25  * Larry Finger <[email protected]>
  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         return (pfile->pkt_len == 0);
  74 }
  75
  76
  77 void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
  78 {
  79         struct ethhdr etherhdr;
  80         struct iphdr ip_hdr;
  81         u16 UserPriority = 0;
  82
  83         _r8712_open_pktfile(ppktfile->pkt, ppktfile);
  84         _r8712_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);
  85
  86         /* get UserPriority from IP hdr*/
  87         if (pattrib->ether_type == 0x0800) {
  88                 _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
  89                 /*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
  90                 UserPriority = ip_hdr.tos >> 5;
  91         } else {
  92                 /* "When priority processing of data frames is supported,
  93                  * a STA's SME should send EAPOL-Key frames at the highest
  94                  * priority." */
  95
  96                 if (pattrib->ether_type == 0x888e)
  97                         UserPriority = 7;
  98         }
  99         pattrib->priority = UserPriority;
 100         pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
 101         pattrib->subtype = WIFI_QOS_DATA_TYPE;
 102 }
 103
 104 void r8712_SetFilter(struct work_struct *work)
 105 {
 106         struct _adapter *padapter = container_of(work, struct _adapter,
 107                                                 wkFilterRxFF0);
 108         u8  oldvalue = 0x00, newvalue = 0x00;
 109         unsigned long irqL;
 110
 111         oldvalue = r8712_read8(padapter, 0x117);
 112         newvalue = oldvalue & 0xfe;
 113         r8712_write8(padapter, 0x117, newvalue);
 114
 115         spin_lock_irqsave(&padapter->lockRxFF0Filter, irqL);
 116         padapter->blnEnableRxFF0Filter = 1;
 117         spin_unlock_irqrestore(&padapter->lockRxFF0Filter, irqL);
 118         do {
 119                 msleep(100);
 120         } while (padapter->blnEnableRxFF0Filter == 1);
 121         r8712_write8(padapter, 0x117, oldvalue);
 122 }
 123
 124 int r8712_xmit_resource_alloc(struct _adapter *padapter,
 125                               struct xmit_buf *pxmitbuf)
 126 {
 127         int i;
 128
 129         for (i = 0; i < 8; i++) {
 130                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 131                 if (!pxmitbuf->pxmit_urb[i]) {
 132                         netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
 133                         return _FAIL;
 134                 }
 135         }
 136         return _SUCCESS;
 137 }
 138
 139 void r8712_xmit_resource_free(struct _adapter *padapter,
 140                               struct xmit_buf *pxmitbuf)
 141 {
 142         int i;
 143
 144         for (i = 0; i < 8; i++) {
 145                 if (pxmitbuf->pxmit_urb[i]) {
 146                         usb_kill_urb(pxmitbuf->pxmit_urb[i]);
 147                         usb_free_urb(pxmitbuf->pxmit_urb[i]);
 148                 }
 149         }
 150 }
 151
 152 void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
 153 {
 154         if (pxframe->pkt)
 155                 dev_kfree_skb_any(pxframe->pkt);
 156         pxframe->pkt = NULL;
 157 }
 158
 159 int r8712_xmit_entry(_pkt *pkt, struct  net_device *pnetdev)
 160 {
 161         struct xmit_frame *pxmitframe = NULL;
 162         struct _adapter *padapter = netdev_priv(pnetdev);
 163         struct xmit_priv *pxmitpriv = &(padapter->xmitpriv);
 164
 165         if (!r8712_if_up(padapter)) {
 166                 goto _xmit_entry_drop;
 167         }
 168         pxmitframe = r8712_alloc_xmitframe(pxmitpriv);
 169         if (!pxmitframe) {
 170                 goto _xmit_entry_drop;
 171         }
 172         if ((!r8712_update_attrib(padapter, pkt, &pxmitframe->attrib))) {
 173                 goto _xmit_entry_drop;
 174         }
 175         padapter->ledpriv.LedControlHandler(padapter, LED_CTL_TX);
 176         pxmitframe->pkt = pkt;
 177         if (r8712_pre_xmit(padapter, pxmitframe)) {
 178                 /*dump xmitframe directly or drop xframe*/
 179                 dev_kfree_skb_any(pkt);
 180                 pxmitframe->pkt = NULL;
 181         }
 182         pxmitpriv->tx_pkts++;
 183         pxmitpriv->tx_bytes += pxmitframe->attrib.last_txcmdsz;
 184         return 0;
 185 _xmit_entry_drop:
 186         if (pxmitframe)
 187                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 188         pxmitpriv->tx_drop++;
 189         dev_kfree_skb_any(pkt);
 190         return 0;
 191 }