drivers/staging/rt2860/rt_pci_rbus.c

/*
 *************************************************************************
 * Ralink Tech Inc.
 * 5F., No.36, Taiyuan St., Jhubei City,
 * Hsinchu County 302,
 * Taiwan, R.O.C.
 *
 * (c) Copyright 2002-2007, Ralink Technology, Inc.
 *
 * This program is free software; you can redistribute it and/or modify  *
 * it under the terms of the GNU General Public License as published by  *
 * the Free Software Foundation; either version 2 of the License, or     *
 * (at your option) any later version.                                   *
 *                                                                       *
 * 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.,                                       *
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 *                                                                       *
 *************************************************************************

    Module Name:
    rt_pci_rbus.c

    Abstract:
    Create and register network interface.

    Revision History:
    Who         When            What
    --------    ----------      ----------------------------------------------
*/

#include "rt_config.h"
#include <linux/pci.h>

IRQ_HANDLE_TYPE rt2860_interrupt(int irq, void *dev_instance);

static void rx_done_tasklet(unsigned long data);
static void mgmt_dma_done_tasklet(unsigned long data);
static void ac0_dma_done_tasklet(unsigned long data);
static void ac1_dma_done_tasklet(unsigned long data);
static void ac2_dma_done_tasklet(unsigned long data);
static void ac3_dma_done_tasklet(unsigned long data);
static void fifo_statistic_full_tasklet(unsigned long data);

/*---------------------------------------------------------------------*/
/* Symbol & Macro Definitions                                          */
/*---------------------------------------------------------------------*/
#define RT2860_INT_RX_DLY				(1<<0)	/* bit 0 */
#define RT2860_INT_TX_DLY				(1<<1)	/* bit 1 */
#define RT2860_INT_RX_DONE				(1<<2)	/* bit 2 */
#define RT2860_INT_AC0_DMA_DONE			(1<<3)	/* bit 3 */
#define RT2860_INT_AC1_DMA_DONE			(1<<4)	/* bit 4 */
#define RT2860_INT_AC2_DMA_DONE			(1<<5)	/* bit 5 */
#define RT2860_INT_AC3_DMA_DONE			(1<<6)	/* bit 6 */
#define RT2860_INT_HCCA_DMA_DONE		(1<<7)	/* bit 7 */
#define RT2860_INT_MGMT_DONE			(1<<8)	/* bit 8 */

#define INT_RX			RT2860_INT_RX_DONE

#define INT_AC0_DLY		(RT2860_INT_AC0_DMA_DONE)	/*| RT2860_INT_TX_DLY) */
#define INT_AC1_DLY		(RT2860_INT_AC1_DMA_DONE)	/*| RT2860_INT_TX_DLY) */
#define INT_AC2_DLY		(RT2860_INT_AC2_DMA_DONE)	/*| RT2860_INT_TX_DLY) */
#define INT_AC3_DLY		(RT2860_INT_AC3_DMA_DONE)	/*| RT2860_INT_TX_DLY) */
#define INT_HCCA_DLY	(RT2860_INT_HCCA_DMA_DONE)	/*| RT2860_INT_TX_DLY) */
#define INT_MGMT_DLY	RT2860_INT_MGMT_DONE

/***************************************************************************
  *
  *	Interface-depended memory allocation/Free related procedures.
  *		Mainly for Hardware TxDesc/RxDesc/MgmtDesc, DMA Memory for TxData/RxData, etc.,
  *
  **************************************************************************/
/* Function for TxDesc Memory allocation. */
void RTMP_AllocateTxDescMemory(struct rt_rtmp_adapter *pAd,
			       u32 Index,
			       unsigned long Length,
			       IN BOOLEAN Cached,
			       void **VirtualAddress,
			       dma_addr_t *PhysicalAddress)
{
	struct os_cookie *pObj = (struct os_cookie *)pAd->OS_Cookie;

	*VirtualAddress =
	    (void *)pci_alloc_consistent(pObj->pci_dev, sizeof(char) * Length,
					 PhysicalAddress);

}

/* Function for MgmtDesc Memory allocation. */
void RTMP_AllocateMgmtDescMemory(struct rt_rtmp_adapter *pAd,
				 unsigned long Length,
				 IN BOOLEAN Cached,
				 void **VirtualAddress,
				 dma_addr_t *PhysicalAddress)
{
	struct os_cookie *pObj = (struct os_cookie *)pAd->OS_Cookie;

	*VirtualAddress =
	    (void *)pci_alloc_consistent(pObj->pci_dev, sizeof(char) * Length,
					 PhysicalAddress);

}

/* Function for RxDesc Memory allocation. */
void RTMP_AllocateRxDescMemory(struct rt_rtmp_adapter *pAd,
			       unsigned long Length,
			       IN BOOLEAN Cached,
			       void **VirtualAddress,
			       dma_addr_t *PhysicalAddress)
{
	struct os_cookie *pObj = (struct os_cookie *)pAd->OS_Cookie;

	*VirtualAddress =
	    (void *)pci_alloc_consistent(pObj->pci_dev, sizeof(char) * Length,
					 PhysicalAddress);

}

/* Function for free allocated Desc Memory. */
void RTMP_FreeDescMemory(struct rt_rtmp_adapter *pAd,
			 unsigned long Length,
			 void *VirtualAddress,
			 dma_addr_t PhysicalAddress)
{
	struct os_cookie *pObj = (struct os_cookie *)pAd->OS_Cookie;

	pci_free_consistent(pObj->pci_dev, Length, VirtualAddress,
			    PhysicalAddress);
}

/* Function for TxData DMA Memory allocation. */
void RTMP_AllocateFirstTxBuffer(struct rt_rtmp_adapter *pAd,
				u32 Index,
				unsigned long Length,
				IN BOOLEAN Cached,
				void **VirtualAddress,
				dma_addr_t *PhysicalAddress)
{
	struct os_cookie *pObj = (struct os_cookie *)pAd->OS_Cookie;

	*VirtualAddress =
	    (void *)pci_alloc_consistent(pObj->pci_dev, sizeof(char) * Length,
					 PhysicalAddress);
}

void RTMP_FreeFirstTxBuffer(struct rt_rtmp_adapter *pAd,
			    unsigned long Length,
			    IN BOOLEAN Cached,
			    void *VirtualAddress,
			    dma_addr_t PhysicalAddress)
{
	struct os_cookie *pObj = (struct os_cookie *)pAd->OS_Cookie;

	pci_free_consistent(pObj->pci_dev, Length, VirtualAddress,
			    PhysicalAddress);
}

/*
 * FUNCTION: Allocate a common buffer for DMA
 * ARGUMENTS:
 *     AdapterHandle:  AdapterHandle
 *     Length:  Number of bytes to allocate
 *     Cached:  Whether or not the memory can be cached
 *     VirtualAddress:  Pointer to memory is returned here
 *     PhysicalAddress:  Physical address corresponding to virtual address
 */
void RTMP_AllocateSharedMemory(struct rt_rtmp_adapter *pAd,
			       unsigned long Length,
			       IN BOOLEAN Cached,
			       void **VirtualAddress,
			       dma_addr_t *PhysicalAddress)
{
	struct os_cookie *pObj = (struct os_cookie *)pAd->OS_Cookie;

	*VirtualAddress =
	    (void *)pci_alloc_consistent(pObj->pci_dev, sizeof(char) * Length,
					 PhysicalAddress);
}

/*
 * FUNCTION: Allocate a packet buffer for DMA
 * ARGUMENTS:
 *     AdapterHandle:  AdapterHandle
 *     Length:  Number of bytes to allocate
 *     Cached:  Whether or not the memory can be cached
 *     VirtualAddress:  Pointer to memory is returned here
 *     PhysicalAddress:  Physical address corresponding to virtual address
 * Notes:
 *     Cached is ignored: always cached memory
 */
void *RTMP_AllocateRxPacketBuffer(struct rt_rtmp_adapter *pAd,
					 unsigned long Length,
					 IN BOOLEAN Cached,
					 void **VirtualAddress,
					 OUT dma_addr_t *
					 PhysicalAddress)
{
	struct sk_buff *pkt;

	pkt = dev_alloc_skb(Length);

	if (pkt == NULL) {
		DBGPRINT(RT_DEBUG_ERROR,
			 ("can't allocate rx %ld size packet\n", Length));
	}

	if (pkt) {
		RTMP_SET_PACKET_SOURCE(OSPKT_TO_RTPKT(pkt), PKTSRC_NDIS);
		*VirtualAddress = (void *)pkt->data;
		*PhysicalAddress =
		    PCI_MAP_SINGLE(pAd, *VirtualAddress, Length, -1,
				   PCI_DMA_FROMDEVICE);
	} else {
		*VirtualAddress = (void *)NULL;
		*PhysicalAddress = (dma_addr_t)NULL;
	}

	return (void *)pkt;
}

void Invalid_Remaining_Packet(struct rt_rtmp_adapter *pAd, unsigned long VirtualAddress)
{
	dma_addr_t PhysicalAddress;

	PhysicalAddress =
	    PCI_MAP_SINGLE(pAd, (void *)(VirtualAddress + 1600),
			   RX_BUFFER_NORMSIZE - 1600, -1, PCI_DMA_FROMDEVICE);
}

int RtmpNetTaskInit(struct rt_rtmp_adapter *pAd)
{
	struct os_cookie *pObj;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	tasklet_init(&pObj->rx_done_task, rx_done_tasklet, (unsigned long)pAd);
	tasklet_init(&pObj->mgmt_dma_done_task, mgmt_dma_done_tasklet,
		     (unsigned long)pAd);
	tasklet_init(&pObj->ac0_dma_done_task, ac0_dma_done_tasklet,
		     (unsigned long)pAd);
	tasklet_init(&pObj->ac1_dma_done_task, ac1_dma_done_tasklet,
		     (unsigned long)pAd);
	tasklet_init(&pObj->ac2_dma_done_task, ac2_dma_done_tasklet,
		     (unsigned long)pAd);
	tasklet_init(&pObj->ac3_dma_done_task, ac3_dma_done_tasklet,
		     (unsigned long)pAd);
	tasklet_init(&pObj->tbtt_task, tbtt_tasklet, (unsigned long)pAd);
	tasklet_init(&pObj->fifo_statistic_full_task,
		     fifo_statistic_full_tasklet, (unsigned long)pAd);

	return NDIS_STATUS_SUCCESS;
}

void RtmpNetTaskExit(struct rt_rtmp_adapter *pAd)
{
	struct os_cookie *pObj;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	tasklet_kill(&pObj->rx_done_task);
	tasklet_kill(&pObj->mgmt_dma_done_task);
	tasklet_kill(&pObj->ac0_dma_done_task);
	tasklet_kill(&pObj->ac1_dma_done_task);
	tasklet_kill(&pObj->ac2_dma_done_task);
	tasklet_kill(&pObj->ac3_dma_done_task);
	tasklet_kill(&pObj->tbtt_task);
	tasklet_kill(&pObj->fifo_statistic_full_task);
}

int RtmpMgmtTaskInit(struct rt_rtmp_adapter *pAd)
{

	return NDIS_STATUS_SUCCESS;
}

/*
========================================================================
Routine Description:
    Close kernel threads.

Arguments:
	*pAd				the raxx interface data pointer

Return Value:
    NONE

Note:
========================================================================
*/
void RtmpMgmtTaskExit(struct rt_rtmp_adapter *pAd)
{

	return;
}

static inline void rt2860_int_enable(struct rt_rtmp_adapter *pAd, unsigned int mode)
{
	u32 regValue;

	pAd->int_disable_mask &= ~(mode);
	regValue = pAd->int_enable_reg & ~(pAd->int_disable_mask);
	/*if (!OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_DOZE)) */
	{
		RTMP_IO_WRITE32(pAd, INT_MASK_CSR, regValue);	/* 1:enable */
	}
	/*else */
	/*      DBGPRINT(RT_DEBUG_TRACE, ("fOP_STATUS_DOZE !\n")); */

	if (regValue != 0)
		RTMP_SET_FLAG(pAd, fRTMP_ADAPTER_INTERRUPT_ACTIVE);
}

static inline void rt2860_int_disable(struct rt_rtmp_adapter *pAd, unsigned int mode)
{
	u32 regValue;

	pAd->int_disable_mask |= mode;
	regValue = pAd->int_enable_reg & ~(pAd->int_disable_mask);
	RTMP_IO_WRITE32(pAd, INT_MASK_CSR, regValue);	/* 0: disable */

	if (regValue == 0) {
		RTMP_CLEAR_FLAG(pAd, fRTMP_ADAPTER_INTERRUPT_ACTIVE);
	}
}

/***************************************************************************
  *
  *	tasklet related procedures.
  *
  **************************************************************************/
static void mgmt_dma_done_tasklet(unsigned long data)
{
	unsigned long flags;
	struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)data;
	INT_SOURCE_CSR_STRUC IntSource;
	struct os_cookie *pObj;

	/* Do nothing if the driver is starting halt state. */
	/* This might happen when timer already been fired before cancel timer with mlmehalt */
	if (RTMP_TEST_FLAG
	    (pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
		return;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

/*      printk("mgmt_dma_done_process\n"); */
	IntSource.word = 0;
	IntSource.field.MgmtDmaDone = 1;
	pAd->int_pending &= ~INT_MGMT_DLY;

	RTMPHandleMgmtRingDmaDoneInterrupt(pAd);

	/* if you use RTMP_SEM_LOCK, sometimes kernel will hang up, no any */
	/* bug report output */
	RTMP_INT_LOCK(&pAd->irq_lock, flags);
	/*
	 * double check to avoid lose of interrupts
	 */
	if (pAd->int_pending & INT_MGMT_DLY) {
		tasklet_hi_schedule(&pObj->mgmt_dma_done_task);
		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
		return;
	}

	/* enable TxDataInt again */
	rt2860_int_enable(pAd, INT_MGMT_DLY);
	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
}

static void rx_done_tasklet(unsigned long data)
{
	unsigned long flags;
	struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)data;
	BOOLEAN bReschedule = 0;
	struct os_cookie *pObj;

	/* Do nothing if the driver is starting halt state. */
	/* This might happen when timer already been fired before cancel timer with mlmehalt */
	if (RTMP_TEST_FLAG
	    (pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
		return;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	pAd->int_pending &= ~(INT_RX);
	bReschedule = STARxDoneInterruptHandle(pAd, 0);

	RTMP_INT_LOCK(&pAd->irq_lock, flags);
	/*
	 * double check to avoid rotting packet
	 */
	if (pAd->int_pending & INT_RX || bReschedule) {
		tasklet_hi_schedule(&pObj->rx_done_task);
		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
		return;
	}

	/* enable Rxint again */
	rt2860_int_enable(pAd, INT_RX);
	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);

}

void fifo_statistic_full_tasklet(unsigned long data)
{
	unsigned long flags;
	struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)data;
	struct os_cookie *pObj;

	/* Do nothing if the driver is starting halt state. */
	/* This might happen when timer already been fired before cancel timer with mlmehalt */
	if (RTMP_TEST_FLAG
	    (pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
		return;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	pAd->int_pending &= ~(FifoStaFullInt);
	NICUpdateFifoStaCounters(pAd);

	RTMP_INT_LOCK(&pAd->irq_lock, flags);
	/*
	 * double check to avoid rotting packet
	 */
	if (pAd->int_pending & FifoStaFullInt) {
		tasklet_hi_schedule(&pObj->fifo_statistic_full_task);
		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
		return;
	}

	/* enable Rxint again */

	rt2860_int_enable(pAd, FifoStaFullInt);
	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);

}

static void ac3_dma_done_tasklet(unsigned long data)
{
	unsigned long flags;
	struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)data;
	INT_SOURCE_CSR_STRUC IntSource;
	struct os_cookie *pObj;
	BOOLEAN bReschedule = 0;

	/* Do nothing if the driver is starting halt state. */
	/* This might happen when timer already been fired before cancel timer with mlmehalt */
	if (RTMP_TEST_FLAG
	    (pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
		return;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

/*      printk("ac0_dma_done_process\n"); */
	IntSource.word = 0;
	IntSource.field.Ac3DmaDone = 1;
	pAd->int_pending &= ~INT_AC3_DLY;

	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);

	RTMP_INT_LOCK(&pAd->irq_lock, flags);
	/*
	 * double check to avoid lose of interrupts
	 */
	if ((pAd->int_pending & INT_AC3_DLY) || bReschedule) {
		tasklet_hi_schedule(&pObj->ac3_dma_done_task);
		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
		return;
	}

	/* enable TxDataInt again */
	rt2860_int_enable(pAd, INT_AC3_DLY);
	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
}

static void ac2_dma_done_tasklet(unsigned long data)
{
	unsigned long flags;
	struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)data;
	INT_SOURCE_CSR_STRUC IntSource;
	struct os_cookie *pObj;
	BOOLEAN bReschedule = 0;

	/* Do nothing if the driver is starting halt state. */
	/* This might happen when timer already been fired before cancel timer with mlmehalt */
	if (RTMP_TEST_FLAG
	    (pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
		return;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	IntSource.word = 0;
	IntSource.field.Ac2DmaDone = 1;
	pAd->int_pending &= ~INT_AC2_DLY;

	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);

	RTMP_INT_LOCK(&pAd->irq_lock, flags);

	/*
	 * double check to avoid lose of interrupts
	 */
	if ((pAd->int_pending & INT_AC2_DLY) || bReschedule) {
		tasklet_hi_schedule(&pObj->ac2_dma_done_task);
		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
		return;
	}

	/* enable TxDataInt again */
	rt2860_int_enable(pAd, INT_AC2_DLY);
	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
}

static void ac1_dma_done_tasklet(unsigned long data)
{
	unsigned long flags;
	struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)data;
	INT_SOURCE_CSR_STRUC IntSource;
	struct os_cookie *pObj;
	BOOLEAN bReschedule = 0;

	/* Do nothing if the driver is starting halt state. */
	/* This might happen when timer already been fired before cancel timer with mlmehalt */
	if (RTMP_TEST_FLAG
	    (pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
		return;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

/*      printk("ac0_dma_done_process\n"); */
	IntSource.word = 0;
	IntSource.field.Ac1DmaDone = 1;
	pAd->int_pending &= ~INT_AC1_DLY;

	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);

	RTMP_INT_LOCK(&pAd->irq_lock, flags);
	/*
	 * double check to avoid lose of interrupts
	 */
	if ((pAd->int_pending & INT_AC1_DLY) || bReschedule) {
		tasklet_hi_schedule(&pObj->ac1_dma_done_task);
		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
		return;
	}

	/* enable TxDataInt again */
	rt2860_int_enable(pAd, INT_AC1_DLY);
	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
}

static void ac0_dma_done_tasklet(unsigned long data)
{
	unsigned long flags;
	struct rt_rtmp_adapter *pAd = (struct rt_rtmp_adapter *)data;
	INT_SOURCE_CSR_STRUC IntSource;
	struct os_cookie *pObj;
	BOOLEAN bReschedule = 0;

	/* Do nothing if the driver is starting halt state. */
	/* This might happen when timer already been fired before cancel timer with mlmehalt */
	if (RTMP_TEST_FLAG
	    (pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
		return;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

/*      printk("ac0_dma_done_process\n"); */
	IntSource.word = 0;
	IntSource.field.Ac0DmaDone = 1;
	pAd->int_pending &= ~INT_AC0_DLY;

/*      RTMPHandleMgmtRingDmaDoneInterrupt(pAd); */
	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);

	RTMP_INT_LOCK(&pAd->irq_lock, flags);
	/*
	 * double check to avoid lose of interrupts
	 */
	if ((pAd->int_pending & INT_AC0_DLY) || bReschedule) {
		tasklet_hi_schedule(&pObj->ac0_dma_done_task);
		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
		return;
	}

	/* enable TxDataInt again */
	rt2860_int_enable(pAd, INT_AC0_DLY);
	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
}

/***************************************************************************
  *
  *	interrupt handler related procedures.
  *
  **************************************************************************/
int print_int_count;

IRQ_HANDLE_TYPE rt2860_interrupt(int irq, void *dev_instance)
{
	struct net_device *net_dev = (struct net_device *)dev_instance;
	struct rt_rtmp_adapter *pAd = NULL;
	INT_SOURCE_CSR_STRUC IntSource;
	struct os_cookie *pObj;

	GET_PAD_FROM_NET_DEV(pAd, net_dev);

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	/* Note 03312008: we can not return here before
	   RTMP_IO_READ32(pAd, INT_SOURCE_CSR, &IntSource.word);
	   RTMP_IO_WRITE32(pAd, INT_SOURCE_CSR, IntSource.word);
	   Or kernel will panic after ifconfig ra0 down sometimes */

	/* */
	/* Inital the Interrupt source. */
	/* */
	IntSource.word = 0x00000000L;
/*      McuIntSource.word = 0x00000000L; */

	/* */
	/* Get the interrupt sources & saved to local variable */
	/* */
	/*RTMP_IO_READ32(pAd, where, &McuIntSource.word); */
	/*RTMP_IO_WRITE32(pAd, , McuIntSource.word); */

	/* */
	/* Flag fOP_STATUS_DOZE On, means ASIC put to sleep, elase means ASICK WakeUp */
	/* And at the same time, clock maybe turned off that say there is no DMA service. */
	/* when ASIC get to sleep. */
	/* To prevent system hang on power saving. */
	/* We need to check it before handle the INT_SOURCE_CSR, ASIC must be wake up. */
	/* */
	/* RT2661 => when ASIC is sleeping, MAC register cannot be read and written. */
	/* RT2860 => when ASIC is sleeping, MAC register can be read and written. */
/*      if (!OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_DOZE)) */
	{
		RTMP_IO_READ32(pAd, INT_SOURCE_CSR, &IntSource.word);
		RTMP_IO_WRITE32(pAd, INT_SOURCE_CSR, IntSource.word);	/* write 1 to clear */
	}
/*      else */
/*              DBGPRINT(RT_DEBUG_TRACE, (">>>fOP_STATUS_DOZE<<<\n")); */

/*      RTMP_IO_READ32(pAd, INT_SOURCE_CSR, &IsrAfterClear); */
/*      RTMP_IO_READ32(pAd, MCU_INT_SOURCE_CSR, &McuIsrAfterClear); */
/*      DBGPRINT(RT_DEBUG_INFO, ("====> RTMPHandleInterrupt(ISR=%08x,Mcu ISR=%08x, After clear ISR=%08x, MCU ISR=%08x)\n", */
/*                      IntSource.word, McuIntSource.word, IsrAfterClear, McuIsrAfterClear)); */

	/* Do nothing if Reset in progress */
	if (RTMP_TEST_FLAG
	    (pAd,
	     (fRTMP_ADAPTER_RESET_IN_PROGRESS |
	      fRTMP_ADAPTER_HALT_IN_PROGRESS))) {
		return IRQ_HANDLED;
	}
	/* */
	/* Handle interrupt, walk through all bits */
	/* Should start from highest priority interrupt */
	/* The priority can be adjust by altering processing if statement */
	/* */

#ifdef DBG

#endif

	pAd->bPCIclkOff = FALSE;

	/* If required spinlock, each interrupt service routine has to acquire */
	/* and release itself. */
	/* */

	/* Do nothing if NIC doesn't exist */
	if (IntSource.word == 0xffffffff) {
		RTMP_SET_FLAG(pAd,
			      (fRTMP_ADAPTER_NIC_NOT_EXIST |
			       fRTMP_ADAPTER_HALT_IN_PROGRESS));
		return IRQ_HANDLED;
	}

	if (IntSource.word & TxCoherent) {
		DBGPRINT(RT_DEBUG_ERROR, (">>>TxCoherent<<<\n"));
		RTMPHandleRxCoherentInterrupt(pAd);
	}

	if (IntSource.word & RxCoherent) {
		DBGPRINT(RT_DEBUG_ERROR, (">>>RxCoherent<<<\n"));
		RTMPHandleRxCoherentInterrupt(pAd);
	}

	if (IntSource.word & FifoStaFullInt) {
		if ((pAd->int_disable_mask & FifoStaFullInt) == 0) {
			/* mask FifoStaFullInt */
			rt2860_int_disable(pAd, FifoStaFullInt);
			tasklet_hi_schedule(&pObj->fifo_statistic_full_task);
		}
		pAd->int_pending |= FifoStaFullInt;
	}

	if (IntSource.word & INT_MGMT_DLY) {
		if ((pAd->int_disable_mask & INT_MGMT_DLY) == 0) {
			rt2860_int_disable(pAd, INT_MGMT_DLY);
			tasklet_hi_schedule(&pObj->mgmt_dma_done_task);
		}
		pAd->int_pending |= INT_MGMT_DLY;
	}

	if (IntSource.word & INT_RX) {
		if ((pAd->int_disable_mask & INT_RX) == 0) {

			/* mask Rxint */
			rt2860_int_disable(pAd, INT_RX);
			tasklet_hi_schedule(&pObj->rx_done_task);
		}
		pAd->int_pending |= INT_RX;
	}

	if (IntSource.word & INT_AC3_DLY) {

		if ((pAd->int_disable_mask & INT_AC3_DLY) == 0) {
			/* mask TxDataInt */
			rt2860_int_disable(pAd, INT_AC3_DLY);
			tasklet_hi_schedule(&pObj->ac3_dma_done_task);
		}
		pAd->int_pending |= INT_AC3_DLY;
	}

	if (IntSource.word & INT_AC2_DLY) {

		if ((pAd->int_disable_mask & INT_AC2_DLY) == 0) {
			/* mask TxDataInt */
			rt2860_int_disable(pAd, INT_AC2_DLY);
			tasklet_hi_schedule(&pObj->ac2_dma_done_task);
		}
		pAd->int_pending |= INT_AC2_DLY;
	}

	if (IntSource.word & INT_AC1_DLY) {

		pAd->int_pending |= INT_AC1_DLY;

		if ((pAd->int_disable_mask & INT_AC1_DLY) == 0) {
			/* mask TxDataInt */
			rt2860_int_disable(pAd, INT_AC1_DLY);
			tasklet_hi_schedule(&pObj->ac1_dma_done_task);
		}

	}

	if (IntSource.word & INT_AC0_DLY) {

/*
		if (IntSource.word & 0x2) {
			u32 reg;
			RTMP_IO_READ32(pAd, DELAY_INT_CFG, &reg);
			printk("IntSource.word = %08x, DELAY_REG = %08x\n", IntSource.word, reg);
		}
*/
		pAd->int_pending |= INT_AC0_DLY;

		if ((pAd->int_disable_mask & INT_AC0_DLY) == 0) {
			/* mask TxDataInt */
			rt2860_int_disable(pAd, INT_AC0_DLY);
			tasklet_hi_schedule(&pObj->ac0_dma_done_task);
		}

	}

	if (IntSource.word & PreTBTTInt) {
		RTMPHandlePreTBTTInterrupt(pAd);
	}

	if (IntSource.word & TBTTInt) {
		RTMPHandleTBTTInterrupt(pAd);
	}

	{
		if (IntSource.word & AutoWakeupInt)
			RTMPHandleTwakeupInterrupt(pAd);
	}

	return IRQ_HANDLED;
}

/*
 * invaild or writeback cache
 * and convert virtual address to physical address
 */
dma_addr_t linux_pci_map_single(struct rt_rtmp_adapter *pAd, void *ptr,
				size_t size, int sd_idx, int direction)
{
	struct os_cookie *pObj;

	/*
	   ------ Porting Information ------
	   > For Tx Alloc:
	   mgmt packets => sd_idx = 0
	   SwIdx: pAd->MgmtRing.TxCpuIdx
	   pTxD : pAd->MgmtRing.Cell[SwIdx].AllocVa;

	   data packets => sd_idx = 1
	   TxIdx : pAd->TxRing[pTxBlk->QueIdx].TxCpuIdx
	   QueIdx: pTxBlk->QueIdx
	   pTxD  : pAd->TxRing[pTxBlk->QueIdx].Cell[TxIdx].AllocVa;

	   > For Rx Alloc:
	   sd_idx = -1
	 */

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	if (sd_idx == 1) {
		struct rt_tx_blk *pTxBlk;
		pTxBlk = (struct rt_tx_blk *)ptr;
		return pci_map_single(pObj->pci_dev, pTxBlk->pSrcBufData,
				      pTxBlk->SrcBufLen, direction);
	} else {
		return pci_map_single(pObj->pci_dev, ptr, size, direction);
	}

}

void linux_pci_unmap_single(struct rt_rtmp_adapter *pAd, dma_addr_t dma_addr,
			    size_t size, int direction)
{
	struct os_cookie *pObj;

	pObj = (struct os_cookie *)pAd->OS_Cookie;

	pci_unmap_single(pObj->pci_dev, dma_addr, size, direction);

}