1/******************************************************************************
2 * recv_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 _RECV_OSDEP_C_
30
31#include <linux/usb.h>
32
33#include "osdep_service.h"
34#include "drv_types.h"
35#include "wifi.h"
36#include "recv_osdep.h"
37#include "osdep_intf.h"
38#include "ethernet.h"
39#include <linux/if_arp.h>
40#include "usb_ops.h"
41
42/*init os related resource in struct recv_priv*/
43/*alloc os related resource in union recv_frame*/
44int r8712_os_recv_resource_alloc(struct _adapter *padapter,
45				 union recv_frame *precvframe)
46{
47	precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
48	return _SUCCESS;
49}
50
51/*alloc os related resource in struct recv_buf*/
52int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter,
53				    struct recv_buf *precvbuf)
54{
55	int res = _SUCCESS;
56
57	precvbuf->irp_pending = false;
58	precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
59	if (precvbuf->purb == NULL)
60		res = _FAIL;
61	precvbuf->pskb = NULL;
62	precvbuf->reuse = false;
63	precvbuf->pallocated_buf = NULL;
64	precvbuf->pbuf = NULL;
65	precvbuf->pdata = NULL;
66	precvbuf->phead = NULL;
67	precvbuf->ptail = NULL;
68	precvbuf->pend = NULL;
69	precvbuf->transfer_len = 0;
70	precvbuf->len = 0;
71	return res;
72}
73
74/*free os related resource in struct recv_buf*/
75int r8712_os_recvbuf_resource_free(struct _adapter *padapter,
76			     struct recv_buf *precvbuf)
77{
78	if (precvbuf->pskb)
79		dev_kfree_skb_any(precvbuf->pskb);
80	if (precvbuf->purb) {
81		usb_kill_urb(precvbuf->purb);
82		usb_free_urb(precvbuf->purb);
83	}
84	return _SUCCESS;
85}
86
87void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup)
88{
89	union iwreq_data wrqu;
90	struct iw_michaelmicfailure ev;
91	struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
92
93	memset(&ev, 0x00, sizeof(ev));
94	if (bgroup)
95		ev.flags |= IW_MICFAILURE_GROUP;
96	else
97		ev.flags |= IW_MICFAILURE_PAIRWISE;
98	ev.src_addr.sa_family = ARPHRD_ETHER;
99	memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
100	memset(&wrqu, 0x00, sizeof(wrqu));
101	wrqu.data.length = sizeof(ev);
102	wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu,
103			    (char *)&ev);
104}
105
106void r8712_recv_indicatepkt(struct _adapter *padapter,
107			    union recv_frame *precv_frame)
108{
109	struct recv_priv *precvpriv;
110	struct  __queue	*pfree_recv_queue;
111	_pkt *skb;
112	struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
113
114	precvpriv = &(padapter->recvpriv);
115	pfree_recv_queue = &(precvpriv->free_recv_queue);
116	skb = precv_frame->u.hdr.pkt;
117	if (skb == NULL)
118		goto _recv_indicatepkt_drop;
119	skb->data = precv_frame->u.hdr.rx_data;
120#ifdef NET_SKBUFF_DATA_USES_OFFSET
121	skb->tail = (sk_buff_data_t)(precv_frame->u.hdr.rx_tail -
122		     precv_frame->u.hdr.rx_head);
123#else
124	skb->tail = (sk_buff_data_t)precv_frame->u.hdr.rx_tail;
125#endif
126	skb->len = precv_frame->u.hdr.len;
127	if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1))
128		skb->ip_summed = CHECKSUM_UNNECESSARY;
129	else
130		skb->ip_summed = CHECKSUM_NONE;
131	skb->dev = padapter->pnetdev;
132	skb->protocol = eth_type_trans(skb, padapter->pnetdev);
133	netif_rx(skb);
134	precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before
135					* r8712_free_recvframe() */
136	r8712_free_recvframe(precv_frame, pfree_recv_queue);
137	return;
138_recv_indicatepkt_drop:
139	 /*enqueue back to free_recv_queue*/
140	 if (precv_frame)
141		r8712_free_recvframe(precv_frame, pfree_recv_queue);
142	 precvpriv->rx_drop++;
143}
144
145void r8712_os_read_port(struct _adapter *padapter, struct recv_buf *precvbuf)
146{
147	struct recv_priv *precvpriv = &padapter->recvpriv;
148
149	precvbuf->ref_cnt--;
150	/*free skb in recv_buf*/
151	dev_kfree_skb_any(precvbuf->pskb);
152	precvbuf->pskb = NULL;
153	precvbuf->reuse = false;
154	if (precvbuf->irp_pending == false)
155		r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
156			 (unsigned char *)precvbuf);
157}
158
159static void _r8712_reordering_ctrl_timeout_handler (void *FunctionContext)
160{
161	struct recv_reorder_ctrl *preorder_ctrl =
162			 (struct recv_reorder_ctrl *)FunctionContext;
163
164	r8712_reordering_ctrl_timeout_handler(preorder_ctrl);
165}
166
167void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
168{
169	struct _adapter *padapter = preorder_ctrl->padapter;
170
171	_init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev,
172		    _r8712_reordering_ctrl_timeout_handler, preorder_ctrl);
173}
174