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 <linux/kmemleak.h>
  17 #include <osdep_service.h>
  18 #include <drv_types.h>
  19 #include <recv_osdep.h>
  20 #include <mlme_osdep.h>
  21
  22 #include <usb_ops_linux.h>
  23 #include <wifi.h>
  24
  25 #include <rtl8188e_hal.h>
  26
  27 int     rtw_hal_init_recv_priv(struct adapter *padapter)
  28 {
  29         struct recv_priv        *precvpriv = &padapter->recvpriv;
  30         int     i, res = _SUCCESS;
  31         struct recv_buf *precvbuf;
  32
  33         tasklet_init(&precvpriv->recv_tasklet,
  34                      (void(*)(unsigned long))rtl8188eu_recv_tasklet,
  35                      (unsigned long)padapter);
  36
  37         /* init recv_buf */
  38         _rtw_init_queue(&precvpriv->free_recv_buf_queue);
  39
  40         precvpriv->pallocated_recv_buf =
  41                 kcalloc(NR_RECVBUFF, sizeof(struct recv_buf), GFP_KERNEL);
  42         if (!precvpriv->pallocated_recv_buf) {
  43                 res = _FAIL;
  44                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
  45                                 ("alloc recv_buf fail!\n"));
  46                 goto exit;
  47         }
  48
  49         precvpriv->precv_buf = precvpriv->pallocated_recv_buf;
  50
  51
  52         precvbuf = (struct recv_buf *)precvpriv->precv_buf;
  53
  54         for (i = 0; i < NR_RECVBUFF; i++) {
  55                 res = rtw_os_recvbuf_resource_alloc(padapter, precvbuf);
  56                 if (res == _FAIL)
  57                         break;
  58                 precvbuf->adapter = padapter;
  59                 precvbuf++;
  60         }
  61         precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
  62         skb_queue_head_init(&precvpriv->rx_skb_queue);
  63         {
  64                 int i;
  65                 size_t tmpaddr = 0;
  66                 size_t alignm = 0;
  67                 struct sk_buff *pskb = NULL;
  68
  69                 skb_queue_head_init(&precvpriv->free_recv_skb_queue);
  70
  71                 for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
  72                         pskb = __netdev_alloc_skb(padapter->pnetdev,
  73                                         MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ,
  74                                         GFP_KERNEL);
  75                         if (pskb) {
  76                                 kmemleak_not_leak(pskb);
  77                                 pskb->dev = padapter->pnetdev;
  78                                 tmpaddr = (size_t)pskb->data;
  79                                 alignm = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
  80                                 skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignm));
  81
  82                                 skb_queue_tail(&precvpriv->free_recv_skb_queue,
  83                                                 pskb);
  84                         }
  85                         pskb = NULL;
  86                 }
  87         }
  88 exit:
  89         return res;
  90 }
  91
  92 void rtw_hal_free_recv_priv(struct adapter *padapter)
  93 {
  94         int     i;
  95         struct recv_buf *precvbuf;
  96         struct recv_priv        *precvpriv = &padapter->recvpriv;
  97
  98         precvbuf = (struct recv_buf *)precvpriv->precv_buf;
  99
 100         for (i = 0; i < NR_RECVBUFF; i++) {
 101                 usb_free_urb(precvbuf->purb);
 102                 precvbuf++;
 103         }
 104
 105         kfree(precvpriv->pallocated_recv_buf);
 106
 107         if (skb_queue_len(&precvpriv->rx_skb_queue))
 108                 DBG_88E(KERN_WARNING "rx_skb_queue not empty\n");
 109         skb_queue_purge(&precvpriv->rx_skb_queue);
 110
 111
 112         if (skb_queue_len(&precvpriv->free_recv_skb_queue))
 113                 DBG_88E(KERN_WARNING "free_recv_skb_queue not empty, %d\n",
 114                                 skb_queue_len(&precvpriv->free_recv_skb_queue));
 115
 116         skb_queue_purge(&precvpriv->free_recv_skb_queue);
 117 }