1 files changed, 290 insertions, 0 deletions
diff --git a/drivers/staging/rtl8188eu/os_dep/xmit_linux.c b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
new file mode 100644
index 000000000000..2e586c063ab8
--- /dev/null
+++ b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
@@ -0,0 +1,290 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ *
+ ******************************************************************************/
+#define _XMIT_OSDEP_C_
+
+#include <linux/version.h>
+#include <osdep_service.h>
+#include <drv_types.h>
+
+#include <if_ether.h>
+#include <ip.h>
+#include <wifi.h>
+#include <mlme_osdep.h>
+#include <xmit_osdep.h>
+#include <osdep_intf.h>
+#include <usb_osintf.h>
+
+uint rtw_remainder_len(struct pkt_file *pfile)
+{
+	return pfile->buf_len - ((size_t)(pfile->cur_addr) -
+	       (size_t)(pfile->buf_start));
+}
+
+void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile)
+{
+_func_enter_;
+
+	pfile->pkt = pktptr;
+	pfile->cur_addr = pktptr->data;
+	pfile->buf_start = pktptr->data;
+	pfile->pkt_len = pktptr->len;
+	pfile->buf_len = pktptr->len;
+
+	pfile->cur_buffer = pfile->buf_start;
+
+_func_exit_;
+}
+
+uint _rtw_pktfile_read (struct pkt_file *pfile, u8 *rmem, uint rlen)
+{
+	uint	len = 0;
+
+_func_enter_;
+
+	len =  rtw_remainder_len(pfile);
+	len = (rlen > len) ? len : rlen;
+
+	if (rmem)
+		skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
+
+	pfile->cur_addr += len;
+	pfile->pkt_len -= len;
+
+_func_exit_;
+
+	return len;
+}
+
+int rtw_endofpktfile(struct pkt_file *pfile)
+{
+_func_enter_;
+
+	if (pfile->pkt_len == 0) {
+	_func_exit_;
+		return true;
+	}
+
+_func_exit_;
+
+	return false;
+}
+
+void rtw_set_tx_chksum_offload(struct sk_buff *pkt, struct pkt_attrib *pattrib)
+{
+}
+
+int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
+{
+	int i;
+
+	pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
+	if (pxmitbuf->pallocated_buf == NULL)
+		return _FAIL;
+
+	pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
+	pxmitbuf->dma_transfer_addr = 0;
+
+	for (i = 0; i < 8; i++) {
+		pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
+		if (pxmitbuf->pxmit_urb[i] == NULL) {
+			DBG_88E("pxmitbuf->pxmit_urb[i]==NULL");
+			return _FAIL;
+		}
+	}
+	return _SUCCESS;
+}
+
+void rtw_os_xmit_resource_free(struct adapter *padapter,
+			       struct xmit_buf *pxmitbuf, u32 free_sz)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		usb_free_urb(pxmitbuf->pxmit_urb[i]);
+
+	kfree(pxmitbuf->pallocated_buf);
+}
+
+#define WMM_XMIT_THRESHOLD	(NR_XMITFRAME*2/5)
+
+void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35))
+	u16	queue;
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+
+	queue = skb_get_queue_mapping(pkt);
+	if (padapter->registrypriv.wifi_spec) {
+		if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
+		    (pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
+			netif_wake_subqueue(padapter->pnetdev, queue);
+	} else {
+		if (__netif_subqueue_stopped(padapter->pnetdev, queue))
+			netif_wake_subqueue(padapter->pnetdev, queue);
+	}
+#else
+	if (netif_queue_stopped(padapter->pnetdev))
+		netif_wake_queue(padapter->pnetdev);
+#endif
+
+	dev_kfree_skb_any(pkt);
+}
+
+void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
+{
+	if (pxframe->pkt)
+		rtw_os_pkt_complete(padapter, pxframe->pkt);
+	pxframe->pkt = NULL;
+}
+
+void rtw_os_xmit_schedule(struct adapter *padapter)
+{
+	unsigned long  irql;
+	struct xmit_priv *pxmitpriv;
+
+	if (!padapter)
+		return;
+
+	pxmitpriv = &padapter->xmitpriv;
+
+	_enter_critical_bh(&pxmitpriv->lock, &irql);
+
+	if (rtw_txframes_pending(padapter))
+		tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
+
+	_exit_critical_bh(&pxmitpriv->lock, &irql);
+}
+
+static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
+{
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+	u16	queue;
+
+	queue = skb_get_queue_mapping(pkt);
+	if (padapter->registrypriv.wifi_spec) {
+		/* No free space for Tx, tx_worker is too slow */
+		if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
+			netif_stop_subqueue(padapter->pnetdev, queue);
+	} else {
+		if (pxmitpriv->free_xmitframe_cnt <= 4) {
+			if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
+				netif_stop_subqueue(padapter->pnetdev, queue);
+		}
+	}
+}
+
+static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
+{
+	struct	sta_priv *pstapriv = &padapter->stapriv;
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+	unsigned long	irql;
+	struct list_head *phead, *plist;
+	struct sk_buff *newskb;
+	struct sta_info *psta = NULL;
+	s32	res;
+
+	_enter_critical_bh(&pstapriv->asoc_list_lock, &irql);
+	phead = &pstapriv->asoc_list;
+	plist = get_next(phead);
+
+	/* free sta asoc_queue */
+	while (!rtw_end_of_queue_search(phead, plist)) {
+		psta = LIST_CONTAINOR(plist, struct sta_info, asoc_list);
+
+		plist = get_next(plist);
+
+		/* avoid   come from STA1 and send back STA1 */
+		if (!memcmp(psta->hwaddr, &skb->data[6], 6))
+			continue;
+
+		newskb = skb_copy(skb, GFP_ATOMIC);
+
+		if (newskb) {
+			memcpy(newskb->data, psta->hwaddr, 6);
+			res = rtw_xmit(padapter, &newskb);
+			if (res < 0) {
+				DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
+				pxmitpriv->tx_drop++;
+				dev_kfree_skb_any(newskb);
+			} else {
+				pxmitpriv->tx_pkts++;
+			}
+		} else {
+			DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__);
+			pxmitpriv->tx_drop++;
+
+			_exit_critical_bh(&pstapriv->asoc_list_lock, &irql);
+			return false;	/*  Caller shall tx this multicast frame via normal way. */
+		}
+	}
+
+	_exit_critical_bh(&pstapriv->asoc_list_lock, &irql);
+	dev_kfree_skb_any(skb);
+	return true;
+}
+
+
+int rtw_xmit_entry(struct sk_buff *pkt, struct  net_device *pnetdev)
+{
+	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
+	s32 res = 0;
+
+_func_enter_;
+
+	RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
+
+	if (rtw_if_up(padapter) == false) {
+		RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
+		goto drop_packet;
+	}
+
+	rtw_check_xmit_resource(padapter, pkt);
+
+	if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
+	    (IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
+	    (padapter->registrypriv.wifi_spec == 0)) {
+		if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
+			res = rtw_mlcst2unicst(padapter, pkt);
+			if (res)
+				goto exit;
+		}
+	}
+
+	res = rtw_xmit(padapter, &pkt);
+	if (res < 0)
+		goto drop_packet;
+
+	pxmitpriv->tx_pkts++;
+	RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
+	goto exit;
+
+drop_packet:
+	pxmitpriv->tx_drop++;
+	dev_kfree_skb_any(pkt);
+	RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));
+
+exit:
+
+_func_exit_;
+
+	return 0;
+}