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 <linux/version.h>
23 #include <osdep_service.h>
24 #include <drv_types.h>
29 #include <mlme_osdep.h>
30 #include <xmit_osdep.h>
31 #include <osdep_intf.h>
32 #include <usb_osintf.h>
34 uint rtw_remainder_len(struct pkt_file *pfile)
36 return pfile->buf_len - ((size_t)(pfile->cur_addr) -
37 (size_t)(pfile->buf_start));
40 void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile)
45 pfile->cur_addr = pktptr->data;
46 pfile->buf_start = pktptr->data;
47 pfile->pkt_len = pktptr->len;
48 pfile->buf_len = pktptr->len;
50 pfile->cur_buffer = pfile->buf_start;
55 uint _rtw_pktfile_read (struct pkt_file *pfile, u8 *rmem, uint rlen)
61 len = rtw_remainder_len(pfile);
62 len = (rlen > len) ? len : rlen;
65 skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
67 pfile->cur_addr += len;
68 pfile->pkt_len -= len;
75 int rtw_endofpktfile(struct pkt_file *pfile)
79 if (pfile->pkt_len == 0) {
89 void rtw_set_tx_chksum_offload(struct sk_buff *pkt, struct pkt_attrib *pattrib)
93 int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
97 pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
98 if (pxmitbuf->pallocated_buf == NULL)
101 pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
102 pxmitbuf->dma_transfer_addr = 0;
104 for (i = 0; i < 8; i++) {
105 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
106 if (pxmitbuf->pxmit_urb[i] == NULL) {
107 DBG_88E("pxmitbuf->pxmit_urb[i]==NULL");
114 void rtw_os_xmit_resource_free(struct adapter *padapter,
115 struct xmit_buf *pxmitbuf, u32 free_sz)
119 for (i = 0; i < 8; i++)
120 usb_free_urb(pxmitbuf->pxmit_urb[i]);
122 kfree(pxmitbuf->pallocated_buf);
125 #define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
127 void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
129 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35))
131 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
133 queue = skb_get_queue_mapping(pkt);
134 if (padapter->registrypriv.wifi_spec) {
135 if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
136 (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
137 netif_wake_subqueue(padapter->pnetdev, queue);
139 if (__netif_subqueue_stopped(padapter->pnetdev, queue))
140 netif_wake_subqueue(padapter->pnetdev, queue);
143 if (netif_queue_stopped(padapter->pnetdev))
144 netif_wake_queue(padapter->pnetdev);
147 dev_kfree_skb_any(pkt);
150 void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
153 rtw_os_pkt_complete(padapter, pxframe->pkt);
157 void rtw_os_xmit_schedule(struct adapter *padapter)
159 struct xmit_priv *pxmitpriv;
164 pxmitpriv = &padapter->xmitpriv;
166 spin_lock_bh(&pxmitpriv->lock);
168 if (rtw_txframes_pending(padapter))
169 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
171 spin_unlock_bh(&pxmitpriv->lock);
174 static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
176 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
179 queue = skb_get_queue_mapping(pkt);
180 if (padapter->registrypriv.wifi_spec) {
181 /* No free space for Tx, tx_worker is too slow */
182 if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
183 netif_stop_subqueue(padapter->pnetdev, queue);
185 if (pxmitpriv->free_xmitframe_cnt <= 4) {
186 if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
187 netif_stop_subqueue(padapter->pnetdev, queue);
192 static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
194 struct sta_priv *pstapriv = &padapter->stapriv;
195 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
196 struct list_head *phead, *plist;
197 struct sk_buff *newskb;
198 struct sta_info *psta = NULL;
201 spin_lock_bh(&pstapriv->asoc_list_lock);
202 phead = &pstapriv->asoc_list;
203 plist = get_next(phead);
205 /* free sta asoc_queue */
206 while (!rtw_end_of_queue_search(phead, plist)) {
207 psta = LIST_CONTAINOR(plist, struct sta_info, asoc_list);
209 plist = get_next(plist);
211 /* avoid come from STA1 and send back STA1 */
212 if (!memcmp(psta->hwaddr, &skb->data[6], 6))
215 newskb = skb_copy(skb, GFP_ATOMIC);
218 memcpy(newskb->data, psta->hwaddr, 6);
219 res = rtw_xmit(padapter, &newskb);
221 DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
222 pxmitpriv->tx_drop++;
223 dev_kfree_skb_any(newskb);
225 pxmitpriv->tx_pkts++;
228 DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__);
229 pxmitpriv->tx_drop++;
231 spin_unlock_bh(&pstapriv->asoc_list_lock);
232 return false; /* Caller shall tx this multicast frame via normal way. */
236 spin_unlock_bh(&pstapriv->asoc_list_lock);
237 dev_kfree_skb_any(skb);
242 int rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev)
244 struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
245 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
246 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
251 RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
253 if (rtw_if_up(padapter) == false) {
254 RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
258 rtw_check_xmit_resource(padapter, pkt);
260 if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
261 (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
262 (padapter->registrypriv.wifi_spec == 0)) {
263 if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
264 res = rtw_mlcst2unicst(padapter, pkt);
270 res = rtw_xmit(padapter, &pkt);
274 pxmitpriv->tx_pkts++;
275 RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
279 pxmitpriv->tx_drop++;
280 dev_kfree_skb_any(pkt);
281 RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));