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
r8712_set_qos(struct pkt_file * ppktfile,struct pkt_attrib * pattrib)65 void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
66 {
67 struct ethhdr etherhdr;
68 struct iphdr ip_hdr;
69 u16 user_priority = 0;
70
71 _r8712_open_pktfile(ppktfile->pkt, ppktfile);
72 _r8712_pktfile_read(ppktfile, (unsigned char *)ðerhdr, ETH_HLEN);
73
74 /* get user_priority from IP hdr*/
75 if (pattrib->ether_type == 0x0800) {
76 _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
77 /*user_priority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
78 user_priority = ip_hdr.tos >> 5;
79 } else {
80 /* "When priority processing of data frames is supported,
81 * a STA's SME should send EAPOL-Key frames at the highest
82 * priority."
83 */
84
85 if (pattrib->ether_type == 0x888e)
86 user_priority = 7;
87 }
88 pattrib->priority = user_priority;
89 pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
90 pattrib->subtype = WIFI_QOS_DATA_TYPE;
91 }
92
r8712_SetFilter(struct work_struct * work)93 void r8712_SetFilter(struct work_struct *work)
94 {
95 struct _adapter *adapter = container_of(work, struct _adapter,
96 wk_filter_rx_ff0);
97 u8 oldvalue = 0x00, newvalue = 0x00;
98
99 oldvalue = r8712_read8(adapter, 0x117);
100 newvalue = oldvalue & 0xfe;
101 r8712_write8(adapter, 0x117, newvalue);
102
103 wait_for_completion(&adapter->rx_filter_ready);
104 r8712_write8(adapter, 0x117, oldvalue);
105 }
106
r8712_xmit_resource_alloc(struct _adapter * padapter,struct xmit_buf * pxmitbuf)107 int r8712_xmit_resource_alloc(struct _adapter *padapter,
108 struct xmit_buf *pxmitbuf)
109 {
110 int i;
111
112 for (i = 0; i < 8; i++) {
113 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
114 if (!pxmitbuf->pxmit_urb[i]) {
115 int k;
116
117 for (k = i - 1; k >= 0; k--) {
118 /* handle allocation errors part way through loop */
119 usb_free_urb(pxmitbuf->pxmit_urb[k]);
120 }
121 netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
122 return -ENOMEM;
123 }
124 kmemleak_not_leak(pxmitbuf->pxmit_urb[i]);
125 }
126 return 0;
127 }
128
r8712_xmit_resource_free(struct _adapter * padapter,struct xmit_buf * pxmitbuf)129 void r8712_xmit_resource_free(struct _adapter *padapter,
130 struct xmit_buf *pxmitbuf)
131 {
132 int i;
133
134 for (i = 0; i < 8; i++) {
135 if (pxmitbuf->pxmit_urb[i]) {
136 usb_kill_urb(pxmitbuf->pxmit_urb[i]);
137 usb_free_urb(pxmitbuf->pxmit_urb[i]);
138 }
139 }
140 }
141
r8712_xmit_complete(struct _adapter * padapter,struct xmit_frame * pxframe)142 void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
143 {
144 if (pxframe->pkt)
145 dev_kfree_skb_any(pxframe->pkt);
146 pxframe->pkt = NULL;
147 }
148
r8712_xmit_entry(_pkt * pkt,struct net_device * netdev)149 netdev_tx_t r8712_xmit_entry(_pkt *pkt, struct net_device *netdev)
150 {
151 struct xmit_frame *xmitframe = NULL;
152 struct _adapter *adapter = netdev_priv(netdev);
153 struct xmit_priv *xmitpriv = &(adapter->xmitpriv);
154
155 if (!r8712_if_up(adapter))
156 goto _xmit_entry_drop;
157
158 xmitframe = r8712_alloc_xmitframe(xmitpriv);
159 if (!xmitframe)
160 goto _xmit_entry_drop;
161
162 if (r8712_update_attrib(adapter, pkt, &xmitframe->attrib))
163 goto _xmit_entry_drop;
164
165 adapter->ledpriv.LedControlHandler(adapter, LED_CTL_TX);
166 xmitframe->pkt = pkt;
167 if (r8712_pre_xmit(adapter, xmitframe)) {
168 /*dump xmitframe directly or drop xframe*/
169 dev_kfree_skb_any(pkt);
170 xmitframe->pkt = NULL;
171 }
172 xmitpriv->tx_pkts++;
173 xmitpriv->tx_bytes += xmitframe->attrib.last_txcmdsz;
174 return NETDEV_TX_OK;
175 _xmit_entry_drop:
176 if (xmitframe)
177 r8712_free_xmitframe(xmitpriv, xmitframe);
178 xmitpriv->tx_drop++;
179 dev_kfree_skb_any(pkt);
180 return NETDEV_TX_OK;
181 }
182