1/******************************************************************************
2 * xmit_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 _XMIT_OSDEP_C_
30
31#include <linux/usb.h>
32#include <linux/ip.h>
33#include <linux/if_ether.h>
34
35#include "osdep_service.h"
36#include "drv_types.h"
37
38#include "wifi.h"
39#include "mlme_osdep.h"
40#include "xmit_osdep.h"
41#include "osdep_intf.h"
42
43static uint remainder_len(struct pkt_file *pfile)
44{
45	return (uint)(pfile->buf_len - ((addr_t)(pfile->cur_addr) -
46	       (addr_t)(pfile->buf_start)));
47}
48
49void _r8712_open_pktfile(_pkt *pktptr, struct pkt_file *pfile)
50{
51	pfile->pkt = pktptr;
52	pfile->cur_addr = pfile->buf_start = pktptr->data;
53	pfile->pkt_len = pfile->buf_len = pktptr->len;
54	pfile->cur_buffer = pfile->buf_start;
55}
56
57uint _r8712_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
58{
59	uint len;
60
61	len = remainder_len(pfile);
62	len = (rlen > len) ? len : rlen;
63	if (rmem)
64		skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len,
65			      rmem, len);
66	pfile->cur_addr += len;
67	pfile->pkt_len -= len;
68	return len;
69}
70
71sint r8712_endofpktfile(struct pkt_file *pfile)
72{
73	if (pfile->pkt_len == 0)
74		return true;
75	else
76		return false;
77}
78
79
80void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
81{
82	struct ethhdr etherhdr;
83	struct iphdr ip_hdr;
84	u16 UserPriority = 0;
85
86	_r8712_open_pktfile(ppktfile->pkt, ppktfile);
87	_r8712_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);
88
89	/* get UserPriority from IP hdr*/
90	if (pattrib->ether_type == 0x0800) {
91		_r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
92		/*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
93		UserPriority = ip_hdr.tos >> 5;
94	} else {
95		/* "When priority processing of data frames is supported,
96		 * a STA's SME should send EAPOL-Key frames at the highest
97		 * priority." */
98
99		if (pattrib->ether_type == 0x888e)
100			UserPriority = 7;
101	}
102	pattrib->priority = UserPriority;
103	pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
104	pattrib->subtype = WIFI_QOS_DATA_TYPE;
105}
106
107void r8712_SetFilter(struct work_struct *work)
108{
109	struct _adapter *padapter = container_of(work, struct _adapter,
110						wkFilterRxFF0);
111	u8  oldvalue = 0x00, newvalue = 0x00;
112	unsigned long irqL;
113
114	oldvalue = r8712_read8(padapter, 0x117);
115	newvalue = oldvalue & 0xfe;
116	r8712_write8(padapter, 0x117, newvalue);
117
118	spin_lock_irqsave(&padapter->lockRxFF0Filter, irqL);
119	padapter->blnEnableRxFF0Filter = 1;
120	spin_unlock_irqrestore(&padapter->lockRxFF0Filter, irqL);
121	do {
122		msleep(100);
123	} while (padapter->blnEnableRxFF0Filter == 1);
124	r8712_write8(padapter, 0x117, oldvalue);
125}
126
127int r8712_xmit_resource_alloc(struct _adapter *padapter,
128			      struct xmit_buf *pxmitbuf)
129{
130	int i;
131
132	for (i = 0; i < 8; i++) {
133		pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
134		if (pxmitbuf->pxmit_urb[i] == NULL) {
135			netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
136			return _FAIL;
137		}
138	}
139	return _SUCCESS;
140}
141
142void r8712_xmit_resource_free(struct _adapter *padapter,
143			      struct xmit_buf *pxmitbuf)
144{
145	int i;
146
147	for (i = 0; i < 8; i++) {
148		if (pxmitbuf->pxmit_urb[i]) {
149			usb_kill_urb(pxmitbuf->pxmit_urb[i]);
150			usb_free_urb(pxmitbuf->pxmit_urb[i]);
151		}
152	}
153}
154
155void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
156{
157	if (pxframe->pkt)
158		dev_kfree_skb_any(pxframe->pkt);
159	pxframe->pkt = NULL;
160}
161
162int r8712_xmit_entry(_pkt *pkt, struct  net_device *pnetdev)
163{
164	struct xmit_frame *pxmitframe = NULL;
165	struct _adapter *padapter = netdev_priv(pnetdev);
166	struct xmit_priv *pxmitpriv = &(padapter->xmitpriv);
167	int ret = 0;
168
169	if (r8712_if_up(padapter) == false) {
170		ret = 0;
171		goto _xmit_entry_drop;
172	}
173	pxmitframe = r8712_alloc_xmitframe(pxmitpriv);
174	if (pxmitframe == NULL) {
175		ret = 0;
176		goto _xmit_entry_drop;
177	}
178	if ((!r8712_update_attrib(padapter, pkt, &pxmitframe->attrib))) {
179		ret = 0;
180		goto _xmit_entry_drop;
181	}
182	padapter->ledpriv.LedControlHandler(padapter, LED_CTL_TX);
183	pxmitframe->pkt = pkt;
184	if (r8712_pre_xmit(padapter, pxmitframe) == true) {
185		/*dump xmitframe directly or drop xframe*/
186		dev_kfree_skb_any(pkt);
187		pxmitframe->pkt = NULL;
188	}
189	pxmitpriv->tx_pkts++;
190	pxmitpriv->tx_bytes += pxmitframe->attrib.last_txcmdsz;
191	return ret;
192_xmit_entry_drop:
193	if (pxmitframe)
194		r8712_free_xmitframe(pxmitpriv, pxmitframe);
195	pxmitpriv->tx_drop++;
196	dev_kfree_skb_any(pkt);
197	return ret;
198}
199