drivers/staging/rtl8188eu/hal/rtl8188eu_recv.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  ******************************************************************************/
  15 #define _RTL8188EU_RECV_C_
  16 #include <osdep_service.h>
  17 #include <drv_types.h>
  18 #include <recv_osdep.h>
  19 #include <mlme_osdep.h>
  20
  21 #include <usb_ops_linux.h>
  22 #include <wifi.h>
  23
  24 #include <rtl8188e_hal.h>
  25
  26 int     rtl8188eu_init_recv_priv(struct adapter *padapter)
  27 {
  28         struct recv_priv        *precvpriv = &padapter->recvpriv;
  29         int     i, res = _SUCCESS;
  30         struct recv_buf *precvbuf;
  31
  32         tasklet_init(&precvpriv->recv_tasklet,
  33                      (void(*)(unsigned long))rtl8188eu_recv_tasklet,
  34                      (unsigned long)padapter);
  35
  36         /* init recv_buf */
  37         _rtw_init_queue(&precvpriv->free_recv_buf_queue);
  38
  39         precvpriv->pallocated_recv_buf =
  40                 kcalloc(NR_RECVBUFF, sizeof(struct recv_buf), GFP_KERNEL);
  41         if (!precvpriv->pallocated_recv_buf) {
  42                 res = _FAIL;
  43                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
  44                                 ("alloc recv_buf fail!\n"));
  45                 goto exit;
  46         }
  47
  48         precvpriv->precv_buf = precvpriv->pallocated_recv_buf;
  49
  50
  51         precvbuf = (struct recv_buf *)precvpriv->precv_buf;
  52
  53         for (i = 0; i < NR_RECVBUFF; i++) {
  54                 res = rtw_os_recvbuf_resource_alloc(padapter, precvbuf);
  55                 if (res == _FAIL)
  56                         break;
  57                 precvbuf->adapter = padapter;
  58                 precvbuf++;
  59         }
  60         precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
  61         skb_queue_head_init(&precvpriv->rx_skb_queue);
  62         {
  63                 int i;
  64                 size_t tmpaddr = 0;
  65                 size_t alignm = 0;
  66                 struct sk_buff *pskb = NULL;
  67
  68                 skb_queue_head_init(&precvpriv->free_recv_skb_queue);
  69
  70                 for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
  71                         pskb = __netdev_alloc_skb(padapter->pnetdev,
  72                                         MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ,
  73                                         GFP_KERNEL);
  74                         if (pskb) {
  75                                 pskb->dev = padapter->pnetdev;
  76                                 tmpaddr = (size_t)pskb->data;
  77                                 alignm = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
  78                                 skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignm));
  79
  80                                 skb_queue_tail(&precvpriv->free_recv_skb_queue,
  81                                                 pskb);
  82                         }
  83                         pskb = NULL;
  84                 }
  85         }
  86 exit:
  87         return res;
  88 }
  89
  90 void rtl8188eu_free_recv_priv(struct adapter *padapter)
  91 {
  92         int     i;
  93         struct recv_buf *precvbuf;
  94         struct recv_priv        *precvpriv = &padapter->recvpriv;
  95
  96         precvbuf = (struct recv_buf *)precvpriv->precv_buf;
  97
  98         for (i = 0; i < NR_RECVBUFF; i++) {
  99                 usb_free_urb(precvbuf->purb);
 100                 precvbuf++;
 101         }
 102
 103         kfree(precvpriv->pallocated_recv_buf);
 104
 105         if (skb_queue_len(&precvpriv->rx_skb_queue))
 106                 DBG_88E(KERN_WARNING "rx_skb_queue not empty\n");
 107         skb_queue_purge(&precvpriv->rx_skb_queue);
 108
 109
 110         if (skb_queue_len(&precvpriv->free_recv_skb_queue))
 111                 DBG_88E(KERN_WARNING "free_recv_skb_queue not empty, %d\n",
 112                                 skb_queue_len(&precvpriv->free_recv_skb_queue));
 113
 114         skb_queue_purge(&precvpriv->free_recv_skb_queue);
 115 }