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 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 *
19 ******************************************************************************/
20#define _RTL8188EU_RECV_C_
21#include <osdep_service.h>
22#include <drv_types.h>
23#include <recv_osdep.h>
24#include <mlme_osdep.h>
25
26#include <usb_ops_linux.h>
27#include <wifi.h>
28
29#include <rtl8188e_hal.h>
30
31int	rtl8188eu_init_recv_priv(struct adapter *padapter)
32{
33	struct recv_priv	*precvpriv = &padapter->recvpriv;
34	int	i, res = _SUCCESS;
35	struct recv_buf *precvbuf;
36
37	tasklet_init(&precvpriv->recv_tasklet,
38		     (void(*)(unsigned long))rtl8188eu_recv_tasklet,
39		     (unsigned long)padapter);
40
41	/* init recv_buf */
42	_rtw_init_queue(&precvpriv->free_recv_buf_queue);
43
44	precvpriv->pallocated_recv_buf =
45		kzalloc(NR_RECVBUFF * sizeof(struct recv_buf), GFP_KERNEL);
46	if (precvpriv->pallocated_recv_buf == NULL) {
47		res = _FAIL;
48		RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
49				("alloc recv_buf fail!\n"));
50		goto exit;
51	}
52
53	precvpriv->precv_buf = precvpriv->pallocated_recv_buf;
54
55
56	precvbuf = (struct recv_buf *)precvpriv->precv_buf;
57
58	for (i = 0; i < NR_RECVBUFF; i++) {
59		res = rtw_os_recvbuf_resource_alloc(padapter, precvbuf);
60		if (res == _FAIL)
61			break;
62		precvbuf->adapter = padapter;
63		precvbuf++;
64	}
65	precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF;
66	skb_queue_head_init(&precvpriv->rx_skb_queue);
67	{
68		int i;
69		size_t tmpaddr = 0;
70		size_t alignm = 0;
71		struct sk_buff *pskb = NULL;
72
73		skb_queue_head_init(&precvpriv->free_recv_skb_queue);
74
75		for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) {
76			pskb = __netdev_alloc_skb(padapter->pnetdev,
77					MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ,
78					GFP_KERNEL);
79			if (pskb) {
80				pskb->dev = padapter->pnetdev;
81				tmpaddr = (size_t)pskb->data;
82				alignm = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
83				skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignm));
84
85				skb_queue_tail(&precvpriv->free_recv_skb_queue,
86						pskb);
87			}
88			pskb = NULL;
89		}
90	}
91exit:
92	return res;
93}
94
95void rtl8188eu_free_recv_priv(struct adapter *padapter)
96{
97	int	i;
98	struct recv_buf	*precvbuf;
99	struct recv_priv	*precvpriv = &padapter->recvpriv;
100
101	precvbuf = (struct recv_buf *)precvpriv->precv_buf;
102
103	for (i = 0; i < NR_RECVBUFF; i++) {
104		usb_free_urb(precvbuf->purb);
105		precvbuf++;
106	}
107
108	kfree(precvpriv->pallocated_recv_buf);
109
110	if (skb_queue_len(&precvpriv->rx_skb_queue))
111		DBG_88E(KERN_WARNING "rx_skb_queue not empty\n");
112	skb_queue_purge(&precvpriv->rx_skb_queue);
113
114
115	if (skb_queue_len(&precvpriv->free_recv_skb_queue))
116		DBG_88E(KERN_WARNING "free_recv_skb_queue not empty, %d\n",
117				skb_queue_len(&precvpriv->free_recv_skb_queue));
118
119	skb_queue_purge(&precvpriv->free_recv_skb_queue);
120}
121