1 files changed, 472 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtlwifi/rtl8723as/os_dep/linux/xmit_linux.c b/drivers/net/wireless/rtlwifi/rtl8723as/os_dep/linux/xmit_linux.c
new file mode 100755
index 000000000000..9baccc3f08e1
--- /dev/null
+++ b/drivers/net/wireless/rtlwifi/rtl8723as/os_dep/linux/xmit_linux.c
@@ -0,0 +1,472 @@
+/******************************************************************************
+ *
+ * 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 <drv_conf.h>
+#include <osdep_service.h>
+#include <drv_types.h>
+
+#include <if_ether.h>
+#include <ip.h>
+#include <rtw_byteorder.h>
+#include <wifi.h>
+#include <mlme_osdep.h>
+#include <xmit_osdep.h>
+#include <osdep_intf.h>
+#include <circ_buf.h>
+
+uint rtw_remainder_len(struct pkt_file *pfile)
+{
+	return (pfile->buf_len - ((SIZE_PTR)(pfile->cur_addr) - (SIZE_PTR)(pfile->buf_start)));
+}
+
+void _rtw_open_pktfile (_pkt *pktptr, struct pkt_file *pfile)
+{
+_func_enter_;
+
+	pfile->pkt = pktptr;
+	pfile->cur_addr = pfile->buf_start = pktptr->data;
+	pfile->pkt_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;	
+}
+
+sint 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(_pkt *pkt, struct pkt_attrib *pattrib)
+{
+
+#ifdef CONFIG_TCP_CSUM_OFFLOAD_TX
+	struct sk_buff *skb = (struct sk_buff *)pkt;
+	pattrib->hw_tcp_csum = 0;
+	
+	if (skb->ip_summed == CHECKSUM_PARTIAL) {
+		if (skb_shinfo(skb)->nr_frags == 0)
+		{	
+                        const struct iphdr *ip = ip_hdr(skb);
+                        if (ip->protocol == IPPROTO_TCP) {
+                                // TCP checksum offload by HW
+                                DBG_871X("CHECKSUM_PARTIAL TCP\n");
+                                pattrib->hw_tcp_csum = 1;
+                                //skb_checksum_help(skb);
+                        } else if (ip->protocol == IPPROTO_UDP) {
+                                //DBG_871X("CHECKSUM_PARTIAL UDP\n");
+#if 1                       
+                                skb_checksum_help(skb);
+#else
+                                // Set UDP checksum = 0 to skip checksum check
+                                struct udphdr *udp = skb_transport_header(skb);
+                                udp->check = 0;
+#endif
+                        } else {
+				DBG_871X("%s-%d TCP CSUM offload Error!!\n", __FUNCTION__, __LINE__);
+                                WARN_ON(1);     /* we need a WARN() */
+			    }
+		}
+		else { // IP fragmentation case
+			DBG_871X("%s-%d nr_frags != 0, using skb_checksum_help(skb);!!\n", __FUNCTION__, __LINE__);
+                	skb_checksum_help(skb);
+		}		
+	}
+#endif	
+	
+}
+
+int rtw_os_xmit_resource_alloc(_adapter *padapter, struct xmit_buf *pxmitbuf,u32 alloc_sz)
+{
+#ifdef CONFIG_USB_HCI
+	int i;
+	struct dvobj_priv	*pdvobjpriv = adapter_to_dvobj(padapter);
+	struct usb_device	*pusbd = pdvobjpriv->pusbdev;
+
+#ifdef CONFIG_USE_USB_BUFFER_ALLOC_TX
+	pxmitbuf->pallocated_buf = rtw_usb_buffer_alloc(pusbd, (size_t)alloc_sz, &pxmitbuf->dma_transfer_addr);
+	pxmitbuf->pbuf = pxmitbuf->pallocated_buf;
+	if(pxmitbuf->pallocated_buf == NULL)
+		return _FAIL;
+#else // CONFIG_USE_USB_BUFFER_ALLOC_TX
+	
+	pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
+	if (pxmitbuf->pallocated_buf == NULL)
+	{
+		return _FAIL;
+	}
+
+	pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
+	pxmitbuf->dma_transfer_addr = 0;
+
+#endif // CONFIG_USE_USB_BUFFER_ALLOC_TX
+
+	for(i=0; i<8; i++)
+      	{
+      		pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
+             	if(pxmitbuf->pxmit_urb[i] == NULL) 
+             	{
+             		DBG_871X("pxmitbuf->pxmit_urb[i]==NULL");
+	        	return _FAIL;	 
+             	}      		  	
+	
+      	}
+#endif
+#if defined(CONFIG_PCI_HCI) || defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
+	pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
+	if (pxmitbuf->pallocated_buf == NULL)
+	{
+		return _FAIL;
+	}
+
+	pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
+#endif
+
+	return _SUCCESS;	
+}
+
+void rtw_os_xmit_resource_free(_adapter *padapter, struct xmit_buf *pxmitbuf,u32 free_sz)
+{
+#ifdef CONFIG_USB_HCI
+	int i;
+	struct dvobj_priv	*pdvobjpriv = adapter_to_dvobj(padapter);
+	struct usb_device	*pusbd = pdvobjpriv->pusbdev;
+
+
+	for(i=0; i<8; i++)
+	{
+		if(pxmitbuf->pxmit_urb[i])
+		{
+			//usb_kill_urb(pxmitbuf->pxmit_urb[i]);
+			usb_free_urb(pxmitbuf->pxmit_urb[i]);
+		}
+	}
+
+#ifdef CONFIG_USE_USB_BUFFER_ALLOC_TX
+	rtw_usb_buffer_free(pusbd, (size_t)free_sz, pxmitbuf->pallocated_buf, pxmitbuf->dma_transfer_addr);
+	pxmitbuf->pallocated_buf =  NULL;
+	pxmitbuf->dma_transfer_addr = 0;
+#else	// CONFIG_USE_USB_BUFFER_ALLOC_TX
+	if(pxmitbuf->pallocated_buf)
+		rtw_mfree(pxmitbuf->pallocated_buf, free_sz);
+#endif	// CONFIG_USE_USB_BUFFER_ALLOC_TX
+
+#endif
+#if defined(CONFIG_PCI_HCI) || defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
+	if(pxmitbuf->pallocated_buf)
+		rtw_mfree(pxmitbuf->pallocated_buf, free_sz);
+#endif
+}
+
+#define WMM_XMIT_THRESHOLD	(NR_XMITFRAME*2/5)
+
+void rtw_os_pkt_complete(_adapter *padapter, _pkt *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
+
+	rtw_skb_free(pkt);
+}
+
+void rtw_os_xmit_complete(_adapter *padapter, struct xmit_frame *pxframe)
+{
+	if(pxframe->pkt)
+		rtw_os_pkt_complete(padapter, pxframe->pkt);
+
+	pxframe->pkt = NULL;
+}
+
+void rtw_os_xmit_schedule(_adapter *padapter)
+{
+	_adapter *pri_adapter = padapter;
+
+#if defined(CONFIG_SDIO_HCI) || defined(CONFIG_GSPI_HCI)
+	if(!padapter)
+		return;
+
+#ifdef CONFIG_CONCURRENT_MODE
+	if(padapter->adapter_type > PRIMARY_ADAPTER)
+		pri_adapter = padapter->pbuddy_adapter;
+#endif
+
+	if (_rtw_queue_empty(&pri_adapter->xmitpriv.pending_xmitbuf_queue) == _FALSE)
+		_rtw_up_sema(&pri_adapter->xmitpriv.xmit_sema);
+
+
+#else
+	_irqL  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);
+#endif
+}
+
+static void rtw_check_xmit_resource(_adapter *padapter, _pkt *pkt)
+{
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+#if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
+	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) {
+			//DBG_871X("%s(): stop netif_subqueue[%d]\n", __FUNCTION__, queue);
+			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);
+		}
+	}
+#else
+	if(pxmitpriv->free_xmitframe_cnt<=4)
+	{
+		if (!rtw_netif_queue_stopped(padapter->pnetdev))
+			rtw_netif_stop_queue(padapter->pnetdev);
+	}
+#endif
+}
+
+#ifdef CONFIG_TX_MCAST2UNI
+int rtw_mlcst2unicst(_adapter *padapter, struct sk_buff *skb)
+{
+	struct	sta_priv *pstapriv = &padapter->stapriv;
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+	_irqL	irqL;
+	_list	*phead, *plist;
+	struct sk_buff *newskb;
+	struct sta_info *psta = NULL;
+	u8 chk_alive_num = 0;
+	char chk_alive_list[NUM_STA];
+	u8 bc_addr[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+	u8 null_addr[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+	int i;
+	s32	res;
+
+	DBG_COUNTER(padapter->tx_logs.os_tx_m2u);
+
+	_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)) == _FALSE) {
+		int stainfo_offset;
+		psta = LIST_CONTAINOR(plist, struct sta_info, asoc_list);
+		plist = get_next(plist);
+
+		stainfo_offset = rtw_stainfo_offset(pstapriv, psta);
+		if (stainfo_offset_valid(stainfo_offset)) {
+			chk_alive_list[chk_alive_num++] = stainfo_offset;
+		}
+	}
+	_exit_critical_bh(&pstapriv->asoc_list_lock, &irqL);
+
+	for (i = 0; i < chk_alive_num; i++) {
+		psta = rtw_get_stainfo_by_offset(pstapriv, chk_alive_list[i]);
+		if(!(psta->state &_FW_LINKED))
+		{
+			DBG_COUNTER(padapter->tx_logs.os_tx_m2u_ignore_fw_linked);
+			continue;		
+		}
+		
+		/* avoid come from STA1 and send back STA1 */ 
+		if (_rtw_memcmp(psta->hwaddr, &skb->data[6], 6) == _TRUE
+			|| _rtw_memcmp(psta->hwaddr, null_addr, 6) == _TRUE
+			|| _rtw_memcmp(psta->hwaddr, bc_addr, 6) == _TRUE
+		)
+		{
+			DBG_COUNTER(padapter->tx_logs.os_tx_m2u_ignore_self);
+			continue;
+		}
+
+		DBG_COUNTER(padapter->tx_logs.os_tx_m2u_entry);
+
+		newskb = rtw_skb_copy(skb);
+
+		if (newskb) {
+			_rtw_memcpy(newskb->data, psta->hwaddr, 6);
+			res = rtw_xmit(padapter, &newskb);
+			if (res < 0) {
+				DBG_COUNTER(padapter->tx_logs.os_tx_m2u_entry_err_xmit);
+				DBG_871X("%s()-%d: rtw_xmit() return error!\n", __FUNCTION__, __LINE__);
+				pxmitpriv->tx_drop++;
+				rtw_skb_free(newskb);
+			} else {
+				pxmitpriv->tx_pkts++;
+			}
+		} else {
+			DBG_COUNTER(padapter->tx_logs.os_tx_m2u_entry_err_skb);
+			DBG_871X("%s-%d: rtw_skb_copy() failed!\n", __FUNCTION__, __LINE__);
+			pxmitpriv->tx_drop++;
+			//rtw_skb_free(skb);
+			return _FALSE;	// Caller shall tx this multicast frame via normal way.
+		}
+	}
+
+	rtw_skb_free(skb);
+	return _TRUE;
+}
+#endif	// CONFIG_TX_MCAST2UNI
+
+
+int _rtw_xmit_entry(_pkt *pkt, _nic_hdl pnetdev)
+{
+	_adapter *padapter = (_adapter *)rtw_netdev_priv(pnetdev);
+	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
+#ifdef CONFIG_TX_MCAST2UNI
+	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
+	extern int rtw_mc2u_disable;
+#endif	// CONFIG_TX_MCAST2UNI	
+	s32 res = 0;
+#if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
+	u16 queue;
+#endif
+
+_func_enter_;
+
+	DBG_COUNTER(padapter->tx_logs.os_tx);
+	RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
+
+	if (rtw_if_up(padapter) == _FALSE) {
+		DBG_COUNTER(padapter->tx_logs.os_tx_err_up);
+		RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
+		#ifdef DBG_TX_DROP_FRAME
+		DBG_871X("DBG_TX_DROP_FRAME %s if_up fail\n", __FUNCTION__);
+		#endif
+		goto drop_packet;
+	}
+
+	rtw_check_xmit_resource(padapter, pkt);
+
+#ifdef CONFIG_TX_MCAST2UNI
+	if ( !rtw_mc2u_disable
+		&& check_fwstate(pmlmepriv, WIFI_AP_STATE) == _TRUE
+		&& ( 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 == _TRUE) {
+				goto exit;
+			}
+		} else {
+			//DBG_871X("Stop M2U(%d, %d)! ", pxmitpriv->free_xmitframe_cnt, pxmitpriv->free_xmitbuf_cnt);
+			//DBG_871X("!m2u );
+			DBG_COUNTER(padapter->tx_logs.os_tx_m2u_stop);
+		}
+	}	
+#endif	// CONFIG_TX_MCAST2UNI	
+
+	res = rtw_xmit(padapter, &pkt);
+	if (res < 0) {
+		#ifdef DBG_TX_DROP_FRAME
+		DBG_871X("DBG_TX_DROP_FRAME %s rtw_xmit fail\n", __FUNCTION__);
+		#endif
+		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++;
+	rtw_skb_free(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;
+}
+
+int rtw_xmit_entry(_pkt *pkt, _nic_hdl pnetdev)
+{
+	if (pkt)
+		rtw_mstat_update(MSTAT_TYPE_SKB, MSTAT_ALLOC_SUCCESS, pkt->truesize);
+	return _rtw_xmit_entry(pkt, pnetdev);
+}
+