1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 *
4 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
5 *
6 ******************************************************************************/
7 #include <drv_types.h>
8 #include <rtw_debug.h>
9
10
rtw_remainder_len(struct pkt_file * pfile)11 uint rtw_remainder_len(struct pkt_file *pfile)
12 {
13 return (pfile->buf_len - ((SIZE_PTR)(pfile->cur_addr) - (SIZE_PTR)(pfile->buf_start)));
14 }
15
_rtw_open_pktfile(struct sk_buff * pktptr,struct pkt_file * pfile)16 void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile)
17 {
18 pfile->pkt = pktptr;
19 pfile->cur_addr = pfile->buf_start = pktptr->data;
20 pfile->pkt_len = pfile->buf_len = pktptr->len;
21
22 pfile->cur_buffer = pfile->buf_start;
23 }
24
_rtw_pktfile_read(struct pkt_file * pfile,u8 * rmem,uint rlen)25 uint _rtw_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
26 {
27 uint len = 0;
28
29 len = rtw_remainder_len(pfile);
30 len = (rlen > len) ? len : rlen;
31
32 if (rmem)
33 skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len, rmem, len);
34
35 pfile->cur_addr += len;
36 pfile->pkt_len -= len;
37 return len;
38 }
39
rtw_endofpktfile(struct pkt_file * pfile)40 signed int rtw_endofpktfile(struct pkt_file *pfile)
41 {
42 if (pfile->pkt_len == 0)
43 return true;
44 return false;
45 }
46
rtw_os_xmit_resource_alloc(struct adapter * padapter,struct xmit_buf * pxmitbuf,u32 alloc_sz,u8 flag)47 int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz, u8 flag)
48 {
49 if (alloc_sz > 0) {
50 pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
51 if (!pxmitbuf->pallocated_buf)
52 return _FAIL;
53
54 pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
55 }
56
57 return _SUCCESS;
58 }
59
rtw_os_xmit_resource_free(struct adapter * padapter,struct xmit_buf * pxmitbuf,u32 free_sz,u8 flag)60 void rtw_os_xmit_resource_free(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 free_sz, u8 flag)
61 {
62 if (free_sz > 0)
63 kfree(pxmitbuf->pallocated_buf);
64 }
65
66 #define WMM_XMIT_THRESHOLD (NR_XMITFRAME * 2 / 5)
67
rtw_os_pkt_complete(struct adapter * padapter,struct sk_buff * pkt)68 void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
69 {
70 u16 queue;
71 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
72
73 queue = skb_get_queue_mapping(pkt);
74 if (padapter->registrypriv.wifi_spec) {
75 if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
76 (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
77 netif_wake_subqueue(padapter->pnetdev, queue);
78 } else {
79 if (__netif_subqueue_stopped(padapter->pnetdev, queue))
80 netif_wake_subqueue(padapter->pnetdev, queue);
81 }
82
83 dev_kfree_skb_any(pkt);
84 }
85
rtw_os_xmit_complete(struct adapter * padapter,struct xmit_frame * pxframe)86 void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
87 {
88 if (pxframe->pkt)
89 rtw_os_pkt_complete(padapter, pxframe->pkt);
90
91 pxframe->pkt = NULL;
92 }
93
rtw_os_xmit_schedule(struct adapter * padapter)94 void rtw_os_xmit_schedule(struct adapter *padapter)
95 {
96 struct adapter *pri_adapter = padapter;
97
98 if (!padapter)
99 return;
100
101 if (!list_empty(&padapter->xmitpriv.pending_xmitbuf_queue.queue))
102 complete(&pri_adapter->xmitpriv.xmit_comp);
103 }
104
rtw_check_xmit_resource(struct adapter * padapter,struct sk_buff * pkt)105 static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
106 {
107 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
108 u16 queue;
109
110 queue = skb_get_queue_mapping(pkt);
111 if (padapter->registrypriv.wifi_spec) {
112 /* No free space for Tx, tx_worker is too slow */
113 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
114 netif_stop_subqueue(padapter->pnetdev, queue);
115 } else {
116 if (pxmitpriv->free_xmitframe_cnt <= 4) {
117 if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
118 netif_stop_subqueue(padapter->pnetdev, queue);
119 }
120 }
121 }
122
rtw_mlcst2unicst(struct adapter * padapter,struct sk_buff * skb)123 static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
124 {
125 struct sta_priv *pstapriv = &padapter->stapriv;
126 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
127 struct list_head *phead, *plist;
128 struct sk_buff *newskb;
129 struct sta_info *psta = NULL;
130 u8 chk_alive_num = 0;
131 char chk_alive_list[NUM_STA];
132 u8 bc_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
133 u8 null_addr[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
134
135 int i;
136 s32 res;
137
138 spin_lock_bh(&pstapriv->asoc_list_lock);
139 phead = &pstapriv->asoc_list;
140 /* free sta asoc_queue */
141 list_for_each(plist, phead) {
142 int stainfo_offset;
143
144 psta = list_entry(plist, struct sta_info, asoc_list);
145
146 stainfo_offset = rtw_stainfo_offset(pstapriv, psta);
147 if (stainfo_offset_valid(stainfo_offset)) {
148 chk_alive_list[chk_alive_num++] = stainfo_offset;
149 }
150 }
151 spin_unlock_bh(&pstapriv->asoc_list_lock);
152
153 for (i = 0; i < chk_alive_num; i++) {
154 psta = rtw_get_stainfo_by_offset(pstapriv, chk_alive_list[i]);
155 if (!(psta->state & _FW_LINKED))
156 continue;
157
158 /* avoid come from STA1 and send back STA1 */
159 if (!memcmp(psta->hwaddr, &skb->data[6], 6) ||
160 !memcmp(psta->hwaddr, null_addr, 6) ||
161 !memcmp(psta->hwaddr, bc_addr, 6))
162 continue;
163
164 newskb = rtw_skb_copy(skb);
165
166 if (newskb) {
167 memcpy(newskb->data, psta->hwaddr, 6);
168 res = rtw_xmit(padapter, &newskb);
169 if (res < 0) {
170 pxmitpriv->tx_drop++;
171 dev_kfree_skb_any(newskb);
172 }
173 } else {
174 pxmitpriv->tx_drop++;
175 /* dev_kfree_skb_any(skb); */
176 return false; /* Caller shall tx this multicast frame via normal way. */
177 }
178 }
179
180 dev_kfree_skb_any(skb);
181 return true;
182 }
183
_rtw_xmit_entry(struct sk_buff * pkt,struct net_device * pnetdev)184 void _rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev)
185 {
186 struct adapter *padapter = rtw_netdev_priv(pnetdev);
187 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
188 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
189 s32 res = 0;
190
191 if (rtw_if_up(padapter) == false)
192 goto drop_packet;
193
194 rtw_check_xmit_resource(padapter, pkt);
195
196 if (!rtw_mc2u_disable
197 && check_fwstate(pmlmepriv, WIFI_AP_STATE) == true
198 && (IP_MCAST_MAC(pkt->data)
199 || ICMPV6_MCAST_MAC(pkt->data)
200 )
201 && padapter->registrypriv.wifi_spec == 0) {
202 if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME / 4)) {
203 res = rtw_mlcst2unicst(padapter, pkt);
204 if (res)
205 return;
206 }
207 }
208
209 res = rtw_xmit(padapter, &pkt);
210 if (res < 0)
211 goto drop_packet;
212
213 return;
214
215 drop_packet:
216 pxmitpriv->tx_drop++;
217 dev_kfree_skb_any(pkt);
218 }
219
rtw_xmit_entry(struct sk_buff * pkt,struct net_device * pnetdev)220 netdev_tx_t rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev)
221 {
222 if (pkt)
223 _rtw_xmit_entry(pkt, pnetdev);
224
225 return NETDEV_TX_OK;
226 }
227