linux/drivers/staging/rtl8712/xmit_linux.c
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   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#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
  44static 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
  50void _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
  58uint _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
  72sint r8712_endofpktfile(struct pkt_file *pfile)
  73{
  74        return (pfile->pkt_len == 0);
  75}
  76
  77
  78void 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
 106void 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
 126int 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
 142void 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
 155void 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
 162int 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}
 195