1 /******************************************************************************
2 *
3 * Copyright(c) 2007 - 2012 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 _XMIT_OSDEP_C_
16
17 #include <osdep_service.h>
18 #include <drv_types.h>
19
20 #include <linux/if_ether.h>
21 #include <linux/ip.h>
22 #include <wifi.h>
23 #include <mlme_osdep.h>
24 #include <xmit_osdep.h>
25 #include <osdep_intf.h>
26
rtw_os_xmit_resource_alloc23a(struct rtw_adapter * padapter,struct xmit_buf * pxmitbuf,u32 alloc_sz)27 int rtw_os_xmit_resource_alloc23a(struct rtw_adapter *padapter,
28 struct xmit_buf *pxmitbuf, u32 alloc_sz)
29 {
30 int i;
31
32 pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL);
33 if (pxmitbuf->pallocated_buf == NULL)
34 return _FAIL;
35
36 pxmitbuf->pbuf = PTR_ALIGN(pxmitbuf->pallocated_buf, XMITBUF_ALIGN_SZ);
37
38 for (i = 0; i < 8; i++) {
39 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
40 if (pxmitbuf->pxmit_urb[i] == NULL) {
41 DBG_8723A("pxmitbuf->pxmit_urb[i]==NULL");
42 return _FAIL;
43 }
44 }
45 return _SUCCESS;
46 }
47
rtw_os_xmit_resource_free23a(struct rtw_adapter * padapter,struct xmit_buf * pxmitbuf)48 void rtw_os_xmit_resource_free23a(struct rtw_adapter *padapter,
49 struct xmit_buf *pxmitbuf)
50 {
51 int i;
52
53 for (i = 0; i < 8; i++)
54 usb_free_urb(pxmitbuf->pxmit_urb[i]);
55 kfree(pxmitbuf->pallocated_buf);
56 }
57
58 #define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
59
rtw_os_pkt_complete23a(struct rtw_adapter * padapter,struct sk_buff * pkt)60 void rtw_os_pkt_complete23a(struct rtw_adapter *padapter, struct sk_buff *pkt)
61 {
62 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
63 u16 queue;
64
65 queue = skb_get_queue_mapping(pkt);
66 if (padapter->registrypriv.wifi_spec) {
67 if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
68 (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
69 netif_wake_subqueue(padapter->pnetdev, queue);
70 } else {
71 if (__netif_subqueue_stopped(padapter->pnetdev, queue))
72 netif_wake_subqueue(padapter->pnetdev, queue);
73 }
74 dev_kfree_skb_any(pkt);
75 }
76
rtw_os_xmit_complete23a(struct rtw_adapter * padapter,struct xmit_frame * pxframe)77 void rtw_os_xmit_complete23a(struct rtw_adapter *padapter,
78 struct xmit_frame *pxframe)
79 {
80 if (pxframe->pkt)
81 rtw_os_pkt_complete23a(padapter, pxframe->pkt);
82
83 pxframe->pkt = NULL;
84 }
85
rtw_os_xmit_schedule23a(struct rtw_adapter * padapter)86 void rtw_os_xmit_schedule23a(struct rtw_adapter *padapter)
87 {
88 struct xmit_priv *pxmitpriv;
89
90 if (!padapter)
91 return;
92 pxmitpriv = &padapter->xmitpriv;
93
94 spin_lock_bh(&pxmitpriv->lock);
95
96 if (rtw_txframes_pending23a(padapter))
97 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
98 spin_unlock_bh(&pxmitpriv->lock);
99 }
100
rtw_check_xmit_resource(struct rtw_adapter * padapter,struct sk_buff * pkt)101 static void rtw_check_xmit_resource(struct rtw_adapter *padapter,
102 struct sk_buff *pkt)
103 {
104 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
105 u16 queue;
106
107 queue = skb_get_queue_mapping(pkt);
108 if (padapter->registrypriv.wifi_spec) {
109 /* No free space for Tx, tx_worker is too slow */
110 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
111 netif_stop_subqueue(padapter->pnetdev, queue);
112 } else {
113 if (pxmitpriv->free_xmitframe_cnt <= 4) {
114 if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
115 netif_stop_subqueue(padapter->pnetdev, queue);
116 }
117 }
118 }
119
rtw_xmit23a_entry23a(struct sk_buff * skb,struct net_device * pnetdev)120 int rtw_xmit23a_entry23a(struct sk_buff *skb, struct net_device *pnetdev)
121 {
122 struct rtw_adapter *padapter = netdev_priv(pnetdev);
123 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
124 int res = 0;
125
126 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
127
128 if (!rtw_if_up23a(padapter)) {
129 RT_TRACE(_module_xmit_osdep_c_, _drv_err_,
130 ("rtw_xmit23a_entry23a: rtw_if_up23a fail\n"));
131 goto drop_packet;
132 }
133
134 rtw_check_xmit_resource(padapter, skb);
135
136 res = rtw_xmit23a(padapter, skb);
137 if (res < 0)
138 goto drop_packet;
139
140 pxmitpriv->tx_pkts++;
141 RT_TRACE(_module_xmit_osdep_c_, _drv_info_,
142 ("rtw_xmit23a_entry23a: tx_pkts=%d\n",
143 (u32)pxmitpriv->tx_pkts));
144 goto exit;
145
146 drop_packet:
147 pxmitpriv->tx_drop++;
148 dev_kfree_skb_any(skb);
149 RT_TRACE(_module_xmit_osdep_c_, _drv_notice_,
150 ("rtw_xmit23a_entry23a: drop, tx_drop=%d\n",
151 (u32)pxmitpriv->tx_drop));
152 exit:
153 return 0;
154 }
155