1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 * xmit_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 _XMIT_OSDEP_C_
18
19 #include <linux/usb.h>
20 #include <linux/ip.h>
21 #include <linux/if_ether.h>
22 #include <linux/kmemleak.h>
23
24 #include "osdep_service.h"
25 #include "drv_types.h"
26
27 #include "wifi.h"
28 #include "mlme_osdep.h"
29 #include "xmit_osdep.h"
30 #include "osdep_intf.h"
31
remainder_len(struct pkt_file * pfile)32 static uint remainder_len(struct pkt_file *pfile)
33 {
34 return (uint)(pfile->buf_len - ((addr_t)(pfile->cur_addr) -
35 (addr_t)(pfile->buf_start)));
36 }
37
_r8712_open_pktfile(_pkt * pktptr,struct pkt_file * pfile)38 void _r8712_open_pktfile(_pkt *pktptr, struct pkt_file *pfile)
39 {
40 pfile->pkt = pktptr;
41 pfile->cur_addr = pfile->buf_start = pktptr->data;
42 pfile->pkt_len = pfile->buf_len = pktptr->len;
43 pfile->cur_buffer = pfile->buf_start;
44 }
45
_r8712_pktfile_read(struct pkt_file * pfile,u8 * rmem,uint rlen)46 uint _r8712_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
47 {
48 uint len;
49
50 len = remainder_len(pfile);
51 len = (rlen > len) ? len : rlen;
52 if (rmem)
53 skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len,
54 rmem, len);
55 pfile->cur_addr += len;
56 pfile->pkt_len -= len;
57 return len;
58 }
59
r8712_endofpktfile(struct pkt_file * pfile)60 sint r8712_endofpktfile(struct pkt_file *pfile)
61 {
62 return (pfile->pkt_len == 0);
63 }
64
65
r8712_set_qos(struct pkt_file * ppktfile,struct pkt_attrib * pattrib)66 void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
67 {
68 struct ethhdr etherhdr;
69 struct iphdr ip_hdr;
70 u16 UserPriority = 0;
71
72 _r8712_open_pktfile(ppktfile->pkt, ppktfile);
73 _r8712_pktfile_read(ppktfile, (unsigned char *)ðerhdr, ETH_HLEN);
74
75 /* get UserPriority from IP hdr*/
76 if (pattrib->ether_type == 0x0800) {
77 _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
78 /*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
79 UserPriority = ip_hdr.tos >> 5;
80 } else {
81 /* "When priority processing of data frames is supported,
82 * a STA's SME should send EAPOL-Key frames at the highest
83 * priority."
84 */
85
86 if (pattrib->ether_type == 0x888e)
87 UserPriority = 7;
88 }
89 pattrib->priority = UserPriority;
90 pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
91 pattrib->subtype = WIFI_QOS_DATA_TYPE;
92 }
93
r8712_SetFilter(struct work_struct * work)94 void r8712_SetFilter(struct work_struct *work)
95 {
96 struct _adapter *adapter = container_of(work, struct _adapter,
97 wk_filter_rx_ff0);
98 u8 oldvalue = 0x00, newvalue = 0x00;
99 unsigned long irqL;
100
101 oldvalue = r8712_read8(adapter, 0x117);
102 newvalue = oldvalue & 0xfe;
103 r8712_write8(adapter, 0x117, newvalue);
104
105 spin_lock_irqsave(&adapter->lock_rx_ff0_filter, irqL);
106 adapter->blnEnableRxFF0Filter = 1;
107 spin_unlock_irqrestore(&adapter->lock_rx_ff0_filter, irqL);
108 do {
109 msleep(100);
110 } while (adapter->blnEnableRxFF0Filter == 1);
111 r8712_write8(adapter, 0x117, oldvalue);
112 }
113
r8712_xmit_resource_alloc(struct _adapter * padapter,struct xmit_buf * pxmitbuf)114 int r8712_xmit_resource_alloc(struct _adapter *padapter,
115 struct xmit_buf *pxmitbuf)
116 {
117 int i;
118
119 for (i = 0; i < 8; i++) {
120 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
121 if (!pxmitbuf->pxmit_urb[i]) {
122 netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
123 return -ENOMEM;
124 }
125 kmemleak_not_leak(pxmitbuf->pxmit_urb[i]);
126 }
127 return 0;
128 }
129
r8712_xmit_resource_free(struct _adapter * padapter,struct xmit_buf * pxmitbuf)130 void r8712_xmit_resource_free(struct _adapter *padapter,
131 struct xmit_buf *pxmitbuf)
132 {
133 int i;
134
135 for (i = 0; i < 8; i++) {
136 if (pxmitbuf->pxmit_urb[i]) {
137 usb_kill_urb(pxmitbuf->pxmit_urb[i]);
138 usb_free_urb(pxmitbuf->pxmit_urb[i]);
139 }
140 }
141 }
142
r8712_xmit_complete(struct _adapter * padapter,struct xmit_frame * pxframe)143 void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
144 {
145 if (pxframe->pkt)
146 dev_kfree_skb_any(pxframe->pkt);
147 pxframe->pkt = NULL;
148 }
149
r8712_xmit_entry(_pkt * pkt,struct net_device * netdev)150 int r8712_xmit_entry(_pkt *pkt, struct net_device *netdev)
151 {
152 struct xmit_frame *xmitframe = NULL;
153 struct _adapter *adapter = netdev_priv(netdev);
154 struct xmit_priv *xmitpriv = &(adapter->xmitpriv);
155
156 if (!r8712_if_up(adapter))
157 goto _xmit_entry_drop;
158
159 xmitframe = r8712_alloc_xmitframe(xmitpriv);
160 if (!xmitframe)
161 goto _xmit_entry_drop;
162
163 if (r8712_update_attrib(adapter, pkt, &xmitframe->attrib))
164 goto _xmit_entry_drop;
165
166 adapter->ledpriv.LedControlHandler(adapter, LED_CTL_TX);
167 xmitframe->pkt = pkt;
168 if (r8712_pre_xmit(adapter, xmitframe)) {
169 /*dump xmitframe directly or drop xframe*/
170 dev_kfree_skb_any(pkt);
171 xmitframe->pkt = NULL;
172 }
173 xmitpriv->tx_pkts++;
174 xmitpriv->tx_bytes += xmitframe->attrib.last_txcmdsz;
175 return 0;
176 _xmit_entry_drop:
177 if (xmitframe)
178 r8712_free_xmitframe(xmitpriv, xmitframe);
179 xmitpriv->tx_drop++;
180 dev_kfree_skb_any(pkt);
181 return 0;
182 }
183