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 #include <linux/kmemleak.h>
  35
  36 #include "osdep_service.h"
  37 #include "drv_types.h"
  38
  39 #include "wifi.h"
  40 #include "mlme_osdep.h"
  41 #include "xmit_osdep.h"
  42 #include "osdep_intf.h"
  43
  44 static uint remainder_len(struct pkt_file *pfile)
  45 {
  46         return (uint)(pfile->buf_len - ((addr_t)(pfile->cur_addr) -
  47                (addr_t)(pfile->buf_start)));
  48 }
  49
  50 void _r8712_open_pktfile(_pkt *pktptr, struct pkt_file *pfile)
  51 {
  52         pfile->pkt = pktptr;
  53         pfile->cur_addr = pfile->buf_start = pktptr->data;
  54         pfile->pkt_len = pfile->buf_len = pktptr->len;
  55         pfile->cur_buffer = pfile->buf_start;
  56 }
  57
  58 uint _r8712_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
  59 {
  60         uint len;
  61
  62         len = remainder_len(pfile);
  63         len = (rlen > len) ? len : rlen;
  64         if (rmem)
  65                 skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len,
  66                               rmem, len);
  67         pfile->cur_addr += len;
  68         pfile->pkt_len -= len;
  69         return len;
  70 }
  71
  72 sint r8712_endofpktfile(struct pkt_file *pfile)
  73 {
  74         return (pfile->pkt_len == 0);
  75 }
  76
  77
  78 void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
  79 {
  80         struct ethhdr etherhdr;
  81         struct iphdr ip_hdr;
  82         u16 UserPriority = 0;
  83
  84         _r8712_open_pktfile(ppktfile->pkt, ppktfile);
  85         _r8712_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);
  86
  87         /* get UserPriority from IP hdr*/
  88         if (pattrib->ether_type == 0x0800) {
  89                 _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
  90                 /*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
  91                 UserPriority = ip_hdr.tos >> 5;
  92         } else {
  93                 /* "When priority processing of data frames is supported,
  94                  * a STA's SME should send EAPOL-Key frames at the highest
  95                  * priority."
  96                  */
  97
  98                 if (pattrib->ether_type == 0x888e)
  99                         UserPriority = 7;
 100         }
 101         pattrib->priority = UserPriority;
 102         pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
 103         pattrib->subtype = WIFI_QOS_DATA_TYPE;
 104 }
 105
 106 void r8712_SetFilter(struct work_struct *work)
 107 {
 108         struct _adapter *padapter = container_of(work, struct _adapter,
 109                                                 wkFilterRxFF0);
 110         u8  oldvalue = 0x00, newvalue = 0x00;
 111         unsigned long irqL;
 112
 113         oldvalue = r8712_read8(padapter, 0x117);
 114         newvalue = oldvalue & 0xfe;
 115         r8712_write8(padapter, 0x117, newvalue);
 116
 117         spin_lock_irqsave(&padapter->lockRxFF0Filter, irqL);
 118         padapter->blnEnableRxFF0Filter = 1;
 119         spin_unlock_irqrestore(&padapter->lockRxFF0Filter, irqL);
 120         do {
 121                 msleep(100);
 122         } while (padapter->blnEnableRxFF0Filter == 1);
 123         r8712_write8(padapter, 0x117, oldvalue);
 124 }
 125
 126 int r8712_xmit_resource_alloc(struct _adapter *padapter,
 127                               struct xmit_buf *pxmitbuf)
 128 {
 129         int i;
 130
 131         for (i = 0; i < 8; i++) {
 132                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 133                 if (!pxmitbuf->pxmit_urb[i]) {
 134                         netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
 135                         return _FAIL;
 136                 }
 137                 kmemleak_not_leak(pxmitbuf->pxmit_urb[i]);
 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 = netdev_priv(pnetdev);
 166         struct xmit_priv *pxmitpriv = &(padapter->xmitpriv);
 167
 168         if (!r8712_if_up(padapter))
 169                 goto _xmit_entry_drop;
 170
 171         pxmitframe = r8712_alloc_xmitframe(pxmitpriv);
 172         if (!pxmitframe)
 173                 goto _xmit_entry_drop;
 174
 175         if ((!r8712_update_attrib(padapter, pkt, &pxmitframe->attrib)))
 176                 goto _xmit_entry_drop;
 177
 178         padapter->ledpriv.LedControlHandler(padapter, LED_CTL_TX);
 179         pxmitframe->pkt = pkt;
 180         if (r8712_pre_xmit(padapter, pxmitframe)) {
 181                 /*dump xmitframe directly or drop xframe*/
 182                 dev_kfree_skb_any(pkt);
 183                 pxmitframe->pkt = NULL;
 184         }
 185         pxmitpriv->tx_pkts++;
 186         pxmitpriv->tx_bytes += pxmitframe->attrib.last_txcmdsz;
 187         return 0;
 188 _xmit_entry_drop:
 189         if (pxmitframe)
 190                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 191         pxmitpriv->tx_drop++;
 192         dev_kfree_skb_any(pkt);
 193         return 0;
 194 }