1 /******************************************************************************
3 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 ******************************************************************************/
20 #define _XMIT_OSDEP_C_
22 #include <osdep_service.h>
23 #include <drv_types.h>
26 #include <mlme_osdep.h>
27 #include <xmit_osdep.h>
28 #include <osdep_intf.h>
30 uint rtw_remainder_len(struct pkt_file *pfile)
32 return pfile->buf_len - ((size_t)(pfile->cur_addr) -
33 (size_t)(pfile->buf_start));
36 void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile)
40 pfile->cur_addr = pktptr->data;
41 pfile->buf_start = pktptr->data;
42 pfile->pkt_len = pktptr->len;
43 pfile->buf_len = pktptr->len;
45 pfile->cur_buffer = pfile->buf_start;
49 uint _rtw_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
54 len = rtw_remainder_len(pfile);
58 skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
60 pfile->cur_addr += len;
61 pfile->pkt_len -= len;
67 int rtw_endofpktfile(struct pkt_file *pfile)
69 return pfile->pkt_len == 0;
72 int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
76 pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL);
77 if (pxmitbuf->pallocated_buf == NULL)
80 pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
81 pxmitbuf->dma_transfer_addr = 0;
83 for (i = 0; i < 8; i++) {
84 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
85 if (pxmitbuf->pxmit_urb[i] == NULL) {
86 DBG_88E("pxmitbuf->pxmit_urb[i]==NULL");
93 void rtw_os_xmit_resource_free(struct adapter *padapter,
94 struct xmit_buf *pxmitbuf, u32 free_sz)
98 for (i = 0; i < 8; i++)
99 usb_free_urb(pxmitbuf->pxmit_urb[i]);
101 kfree(pxmitbuf->pallocated_buf);
104 #define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
106 void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
109 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
111 queue = skb_get_queue_mapping(pkt);
112 if (padapter->registrypriv.wifi_spec) {
113 if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
114 (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
115 netif_wake_subqueue(padapter->pnetdev, queue);
117 if (__netif_subqueue_stopped(padapter->pnetdev, queue))
118 netif_wake_subqueue(padapter->pnetdev, queue);
121 dev_kfree_skb_any(pkt);
124 void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
127 rtw_os_pkt_complete(padapter, pxframe->pkt);
131 void rtw_os_xmit_schedule(struct adapter *padapter)
133 struct xmit_priv *pxmitpriv;
138 pxmitpriv = &padapter->xmitpriv;
140 spin_lock_bh(&pxmitpriv->lock);
142 if (rtw_txframes_pending(padapter))
143 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
145 spin_unlock_bh(&pxmitpriv->lock);
148 static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
150 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
153 queue = skb_get_queue_mapping(pkt);
154 if (padapter->registrypriv.wifi_spec) {
155 /* No free space for Tx, tx_worker is too slow */
156 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
157 netif_stop_subqueue(padapter->pnetdev, queue);
159 if (pxmitpriv->free_xmitframe_cnt <= 4) {
160 if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
161 netif_stop_subqueue(padapter->pnetdev, queue);
166 static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
168 struct sta_priv *pstapriv = &padapter->stapriv;
169 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
170 struct list_head *phead, *plist;
171 struct sk_buff *newskb;
172 struct sta_info *psta = NULL;
175 spin_lock_bh(&pstapriv->asoc_list_lock);
176 phead = &pstapriv->asoc_list;
179 /* free sta asoc_queue */
180 while (phead != plist) {
181 psta = container_of(plist, struct sta_info, asoc_list);
185 /* avoid come from STA1 and send back STA1 */
186 if (!memcmp(psta->hwaddr, &skb->data[6], 6))
189 newskb = skb_copy(skb, GFP_ATOMIC);
192 memcpy(newskb->data, psta->hwaddr, 6);
193 res = rtw_xmit(padapter, &newskb);
195 DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
196 pxmitpriv->tx_drop++;
197 dev_kfree_skb_any(newskb);
199 pxmitpriv->tx_pkts++;
202 DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__);
203 pxmitpriv->tx_drop++;
205 spin_unlock_bh(&pstapriv->asoc_list_lock);
206 return false; /* Caller shall tx this multicast frame via normal way. */
210 spin_unlock_bh(&pstapriv->asoc_list_lock);
211 dev_kfree_skb_any(skb);
216 int rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev)
218 struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
219 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
220 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
224 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
226 if (rtw_if_up(padapter) == false) {
227 RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
231 rtw_check_xmit_resource(padapter, pkt);
233 if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
234 (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
235 (padapter->registrypriv.wifi_spec == 0)) {
236 if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
237 res = rtw_mlcst2unicst(padapter, pkt);
243 res = rtw_xmit(padapter, &pkt);
247 pxmitpriv->tx_pkts++;
248 RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
252 pxmitpriv->tx_drop++;
253 dev_kfree_skb_any(pkt);
254 RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));