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*/
r8712_os_recv_resource_alloc(struct _adapter * padapter,union recv_frame * precvframe)44 int 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*/
r8712_os_recvbuf_resource_alloc(struct _adapter * padapter,struct recv_buf * precvbuf)52 int 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*/
r8712_os_recvbuf_resource_free(struct _adapter * padapter,struct recv_buf * precvbuf)75 int 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
r8712_handle_tkip_mic_err(struct _adapter * padapter,u8 bgroup)87 void 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 ether_addr_copy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0]);
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
r8712_recv_indicatepkt(struct _adapter * padapter,union recv_frame * precv_frame)106 void 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 skb->len = precv_frame->u.hdr.len;
121 skb_set_tail_pointer(skb, skb->len);
122 if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1))
123 skb->ip_summed = CHECKSUM_UNNECESSARY;
124 else
125 skb->ip_summed = CHECKSUM_NONE;
126 skb->dev = padapter->pnetdev;
127 skb->protocol = eth_type_trans(skb, padapter->pnetdev);
128 netif_rx(skb);
129 precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before
130 * r8712_free_recvframe()
131 */
132 r8712_free_recvframe(precv_frame, pfree_recv_queue);
133 return;
134 _recv_indicatepkt_drop:
135 /*enqueue back to free_recv_queue*/
136 if (precv_frame)
137 r8712_free_recvframe(precv_frame, pfree_recv_queue);
138 precvpriv->rx_drop++;
139 }
140
_r8712_reordering_ctrl_timeout_handler(unsigned long data)141 static void _r8712_reordering_ctrl_timeout_handler (unsigned long data)
142 {
143 struct recv_reorder_ctrl *preorder_ctrl =
144 (struct recv_reorder_ctrl *)data;
145
146 r8712_reordering_ctrl_timeout_handler(preorder_ctrl);
147 }
148
r8712_init_recv_timer(struct recv_reorder_ctrl * preorder_ctrl)149 void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
150 {
151 setup_timer(&preorder_ctrl->reordering_ctrl_timer,
152 _r8712_reordering_ctrl_timeout_handler,
153 (unsigned long)preorder_ctrl);
154 }
155