1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 * recv_linux.c
4 *
5 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
6 * Linux device driver for RTL8192SU
7 *
8 * Modifications for inclusion into the Linux staging tree are
9 * Copyright(c) 2010 Larry Finger. All rights reserved.
10 *
11 * Contact information:
12 * WLAN FAE <wlanfae@realtek.com>.
13 * Larry Finger <Larry.Finger@lwfinger.net>
14 *
15 ******************************************************************************/
16
17 #define _RECV_OSDEP_C_
18
19 #include <linux/usb.h>
20
21 #include "osdep_service.h"
22 #include "drv_types.h"
23 #include "wifi.h"
24 #include "recv_osdep.h"
25 #include "osdep_intf.h"
26 #include "ethernet.h"
27 #include <linux/if_arp.h>
28 #include "usb_ops.h"
29
30 /*init os related resource in struct recv_priv*/
31 /*alloc os related resource in union recv_frame*/
r8712_os_recv_resource_alloc(struct _adapter * padapter,union recv_frame * precvframe)32 void r8712_os_recv_resource_alloc(struct _adapter *padapter,
33 union recv_frame *precvframe)
34 {
35 precvframe->u.hdr.pkt_newalloc = NULL;
36 precvframe->u.hdr.pkt = NULL;
37 }
38
39 /*alloc os related resource in struct recv_buf*/
r8712_os_recvbuf_resource_alloc(struct _adapter * padapter,struct recv_buf * precvbuf)40 int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter,
41 struct recv_buf *precvbuf)
42 {
43 int res = 0;
44
45 precvbuf->irp_pending = false;
46 precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
47 if (!precvbuf->purb)
48 res = -ENOMEM;
49 precvbuf->pskb = NULL;
50 precvbuf->pallocated_buf = NULL;
51 precvbuf->pbuf = NULL;
52 precvbuf->pdata = NULL;
53 precvbuf->phead = NULL;
54 precvbuf->ptail = NULL;
55 precvbuf->pend = NULL;
56 precvbuf->transfer_len = 0;
57 precvbuf->len = 0;
58 return res;
59 }
60
61 /*free os related resource in struct recv_buf*/
r8712_os_recvbuf_resource_free(struct _adapter * padapter,struct recv_buf * precvbuf)62 void r8712_os_recvbuf_resource_free(struct _adapter *padapter,
63 struct recv_buf *precvbuf)
64 {
65 if (precvbuf->pskb)
66 dev_kfree_skb_any(precvbuf->pskb);
67 if (precvbuf->purb) {
68 usb_kill_urb(precvbuf->purb);
69 usb_free_urb(precvbuf->purb);
70 }
71 }
72
r8712_handle_tkip_mic_err(struct _adapter * adapter,u8 bgroup)73 void r8712_handle_tkip_mic_err(struct _adapter *adapter, u8 bgroup)
74 {
75 union iwreq_data wrqu;
76 struct iw_michaelmicfailure ev;
77 struct mlme_priv *mlmepriv = &adapter->mlmepriv;
78
79 memset(&ev, 0x00, sizeof(ev));
80 if (bgroup)
81 ev.flags |= IW_MICFAILURE_GROUP;
82 else
83 ev.flags |= IW_MICFAILURE_PAIRWISE;
84 ev.src_addr.sa_family = ARPHRD_ETHER;
85 ether_addr_copy(ev.src_addr.sa_data, &mlmepriv->assoc_bssid[0]);
86 memset(&wrqu, 0x00, sizeof(wrqu));
87 wrqu.data.length = sizeof(ev);
88 wireless_send_event(adapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu,
89 (char *)&ev);
90 }
91
r8712_recv_indicatepkt(struct _adapter * adapter,union recv_frame * recvframe)92 void r8712_recv_indicatepkt(struct _adapter *adapter,
93 union recv_frame *recvframe)
94 {
95 struct recv_priv *recvpriv;
96 struct __queue *free_recv_queue;
97 _pkt *skb;
98 struct rx_pkt_attrib *attrib = &recvframe->u.hdr.attrib;
99
100 recvpriv = &adapter->recvpriv;
101 free_recv_queue = &recvpriv->free_recv_queue;
102 skb = recvframe->u.hdr.pkt;
103 if (!skb)
104 goto _recv_indicatepkt_drop;
105 skb->data = recvframe->u.hdr.rx_data;
106 skb->len = recvframe->u.hdr.len;
107 skb_set_tail_pointer(skb, skb->len);
108 if ((attrib->tcpchk_valid == 1) && (attrib->tcp_chkrpt == 1))
109 skb->ip_summed = CHECKSUM_UNNECESSARY;
110 else
111 skb->ip_summed = CHECKSUM_NONE;
112 skb->dev = adapter->pnetdev;
113 skb->protocol = eth_type_trans(skb, adapter->pnetdev);
114 netif_rx(skb);
115 recvframe->u.hdr.pkt = NULL; /* pointers to NULL before
116 * r8712_free_recvframe()
117 */
118 r8712_free_recvframe(recvframe, free_recv_queue);
119 return;
120 _recv_indicatepkt_drop:
121 /*enqueue back to free_recv_queue*/
122 if (recvframe)
123 r8712_free_recvframe(recvframe, free_recv_queue);
124 recvpriv->rx_drop++;
125 }
126
_r8712_reordering_ctrl_timeout_handler(struct timer_list * t)127 static void _r8712_reordering_ctrl_timeout_handler (struct timer_list *t)
128 {
129 struct recv_reorder_ctrl *reorder_ctrl =
130 from_timer(reorder_ctrl, t, reordering_ctrl_timer);
131
132 r8712_reordering_ctrl_timeout_handler(reorder_ctrl);
133 }
134
r8712_init_recv_timer(struct recv_reorder_ctrl * preorder_ctrl)135 void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
136 {
137 timer_setup(&preorder_ctrl->reordering_ctrl_timer,
138 _r8712_reordering_ctrl_timeout_handler, 0);
139 }
140