1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
4 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
6 ******************************************************************************/
9 #include <osdep_service.h>
10 #include <drv_types.h>
13 #include <mlme_osdep.h>
14 #include <xmit_osdep.h>
15 #include <osdep_intf.h>
17 int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
21 pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL);
22 if (!pxmitbuf->pallocated_buf)
25 pxmitbuf->pbuf = PTR_ALIGN(pxmitbuf->pallocated_buf, XMITBUF_ALIGN_SZ);
26 pxmitbuf->dma_transfer_addr = 0;
28 for (i = 0; i < 8; i++) {
29 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
30 if (!pxmitbuf->pxmit_urb[i]) {
31 DBG_88E("pxmitbuf->pxmit_urb[i]==NULL");
38 void rtw_os_xmit_resource_free(struct xmit_buf *pxmitbuf)
42 for (i = 0; i < 8; i++)
43 usb_free_urb(pxmitbuf->pxmit_urb[i]);
45 kfree(pxmitbuf->pallocated_buf);
48 #define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
50 void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
53 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
55 queue = skb_get_queue_mapping(pkt);
56 if (padapter->registrypriv.wifi_spec) {
57 if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
58 (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
59 netif_wake_subqueue(padapter->pnetdev, queue);
61 if (__netif_subqueue_stopped(padapter->pnetdev, queue))
62 netif_wake_subqueue(padapter->pnetdev, queue);
65 dev_kfree_skb_any(pkt);
68 void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
71 rtw_os_pkt_complete(padapter, pxframe->pkt);
75 void rtw_os_xmit_schedule(struct adapter *padapter)
77 struct xmit_priv *pxmitpriv;
82 pxmitpriv = &padapter->xmitpriv;
84 spin_lock_bh(&pxmitpriv->lock);
86 if (rtw_txframes_pending(padapter))
87 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
89 spin_unlock_bh(&pxmitpriv->lock);
92 static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
94 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
97 queue = skb_get_queue_mapping(pkt);
98 if (padapter->registrypriv.wifi_spec) {
99 /* No free space for Tx, tx_worker is too slow */
100 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
101 netif_stop_subqueue(padapter->pnetdev, queue);
103 if (pxmitpriv->free_xmitframe_cnt <= 4) {
104 if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
105 netif_stop_subqueue(padapter->pnetdev, queue);
110 static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
112 struct sta_priv *pstapriv = &padapter->stapriv;
113 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
114 struct list_head *phead, *plist;
115 struct sk_buff *newskb;
116 struct sta_info *psta = NULL;
119 spin_lock_bh(&pstapriv->asoc_list_lock);
120 phead = &pstapriv->asoc_list;
123 /* free sta asoc_queue */
124 while (phead != plist) {
125 psta = container_of(plist, struct sta_info, asoc_list);
129 /* avoid come from STA1 and send back STA1 */
130 if (!memcmp(psta->hwaddr, &skb->data[6], 6))
133 newskb = skb_copy(skb, GFP_ATOMIC);
136 memcpy(newskb->data, psta->hwaddr, 6);
137 res = rtw_xmit(padapter, &newskb);
139 DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
140 pxmitpriv->tx_drop++;
141 dev_kfree_skb_any(newskb);
143 pxmitpriv->tx_pkts++;
146 DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__);
147 pxmitpriv->tx_drop++;
149 spin_unlock_bh(&pstapriv->asoc_list_lock);
150 return false; /* Caller shall tx this multicast frame via normal way. */
154 spin_unlock_bh(&pstapriv->asoc_list_lock);
155 dev_kfree_skb_any(skb);
159 int rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev)
161 struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
162 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
163 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
166 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
168 if (rtw_if_up(padapter) == false) {
169 RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
173 rtw_check_xmit_resource(padapter, pkt);
175 if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
176 (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
177 (padapter->registrypriv.wifi_spec == 0)) {
178 if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
179 res = rtw_mlcst2unicst(padapter, pkt);
185 res = rtw_xmit(padapter, &pkt);
189 pxmitpriv->tx_pkts++;
190 RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
194 pxmitpriv->tx_drop++;
195 dev_kfree_skb_any(pkt);
196 RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));