drivers/net/wireless/bcm43xx/bcm43xx_dma.h - linux/kernel/git/klassert/ipsec-next - Git at Google

 #ifndef BCM43xx_DMA_H_
 #define BCM43xx_DMA_H_

 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
 #include <linux/dma-mapping.h>
 #include <linux/linkage.h>
 #include <asm/atomic.h>


 /* DMA-Interrupt reasons. */
 #define BCM43xx_DMAIRQ_FATALMASK	((1 << 10) | (1 << 11) | (1 << 12) \
 					 | (1 << 14) | (1 << 15))
 #define BCM43xx_DMAIRQ_NONFATALMASK	(1 << 13)
 #define BCM43xx_DMAIRQ_RX_DONE		(1 << 16)


 /*** 32-bit DMA Engine. ***/

 /* 32-bit DMA controller registers. */
 #define BCM43xx_DMA32_TXCTL				0x00
 #define		BCM43xx_DMA32_TXENABLE			0x00000001
 #define		BCM43xx_DMA32_TXSUSPEND			0x00000002
 #define		BCM43xx_DMA32_TXLOOPBACK		0x00000004
 #define		BCM43xx_DMA32_TXFLUSH			0x00000010
 #define		BCM43xx_DMA32_TXADDREXT_MASK		0x00030000
 #define		BCM43xx_DMA32_TXADDREXT_SHIFT		16
 #define BCM43xx_DMA32_TXRING				0x04
 #define BCM43xx_DMA32_TXINDEX				0x08
 #define BCM43xx_DMA32_TXSTATUS				0x0C
 #define		BCM43xx_DMA32_TXDPTR			0x00000FFF
 #define		BCM43xx_DMA32_TXSTATE			0x0000F000
 #define			BCM43xx_DMA32_TXSTAT_DISABLED	0x00000000
 #define			BCM43xx_DMA32_TXSTAT_ACTIVE	0x00001000
 #define			BCM43xx_DMA32_TXSTAT_IDLEWAIT	0x00002000
 #define			BCM43xx_DMA32_TXSTAT_STOPPED	0x00003000
 #define			BCM43xx_DMA32_TXSTAT_SUSP	0x00004000
 #define		BCM43xx_DMA32_TXERROR			0x000F0000
 #define			BCM43xx_DMA32_TXERR_NOERR	0x00000000
 #define			BCM43xx_DMA32_TXERR_PROT	0x00010000
 #define			BCM43xx_DMA32_TXERR_UNDERRUN	0x00020000
 #define			BCM43xx_DMA32_TXERR_BUFREAD	0x00030000
 #define			BCM43xx_DMA32_TXERR_DESCREAD	0x00040000
 #define		BCM43xx_DMA32_TXACTIVE			0xFFF00000
 #define BCM43xx_DMA32_RXCTL				0x10
 #define		BCM43xx_DMA32_RXENABLE			0x00000001
 #define		BCM43xx_DMA32_RXFROFF_MASK		0x000000FE
 #define		BCM43xx_DMA32_RXFROFF_SHIFT		1
 #define		BCM43xx_DMA32_RXDIRECTFIFO		0x00000100
 #define		BCM43xx_DMA32_RXADDREXT_MASK		0x00030000
 #define		BCM43xx_DMA32_RXADDREXT_SHIFT		16
 #define BCM43xx_DMA32_RXRING				0x14
 #define BCM43xx_DMA32_RXINDEX				0x18
 #define BCM43xx_DMA32_RXSTATUS				0x1C
 #define		BCM43xx_DMA32_RXDPTR			0x00000FFF
 #define		BCM43xx_DMA32_RXSTATE			0x0000F000
 #define			BCM43xx_DMA32_RXSTAT_DISABLED	0x00000000
 #define			BCM43xx_DMA32_RXSTAT_ACTIVE	0x00001000
 #define			BCM43xx_DMA32_RXSTAT_IDLEWAIT	0x00002000
 #define			BCM43xx_DMA32_RXSTAT_STOPPED	0x00003000
 #define		BCM43xx_DMA32_RXERROR			0x000F0000
 #define			BCM43xx_DMA32_RXERR_NOERR	0x00000000
 #define			BCM43xx_DMA32_RXERR_PROT	0x00010000
 #define			BCM43xx_DMA32_RXERR_OVERFLOW	0x00020000
 #define			BCM43xx_DMA32_RXERR_BUFWRITE	0x00030000
 #define			BCM43xx_DMA32_RXERR_DESCREAD	0x00040000
 #define		BCM43xx_DMA32_RXACTIVE			0xFFF00000

 /* 32-bit DMA descriptor. */
 struct bcm43xx_dmadesc32 {
 	__le32 control;
 	__le32 address;
 } __attribute__((__packed__));
 #define BCM43xx_DMA32_DCTL_BYTECNT		0x00001FFF
 #define BCM43xx_DMA32_DCTL_ADDREXT_MASK		0x00030000
 #define BCM43xx_DMA32_DCTL_ADDREXT_SHIFT	16
 #define BCM43xx_DMA32_DCTL_DTABLEEND		0x10000000
 #define BCM43xx_DMA32_DCTL_IRQ			0x20000000
 #define BCM43xx_DMA32_DCTL_FRAMEEND		0x40000000
 #define BCM43xx_DMA32_DCTL_FRAMESTART		0x80000000

 /* Address field Routing value. */
 #define BCM43xx_DMA32_ROUTING			0xC0000000
 #define BCM43xx_DMA32_ROUTING_SHIFT		30
 #define		BCM43xx_DMA32_NOTRANS		0x00000000
 #define		BCM43xx_DMA32_CLIENTTRANS	0x40000000


 /*** 64-bit DMA Engine. ***/

 /* 64-bit DMA controller registers. */
 #define BCM43xx_DMA64_TXCTL				0x00
 #define		BCM43xx_DMA64_TXENABLE			0x00000001
 #define		BCM43xx_DMA64_TXSUSPEND			0x00000002
 #define		BCM43xx_DMA64_TXLOOPBACK		0x00000004
 #define		BCM43xx_DMA64_TXFLUSH			0x00000010
 #define		BCM43xx_DMA64_TXADDREXT_MASK		0x00030000
 #define		BCM43xx_DMA64_TXADDREXT_SHIFT		16
 #define BCM43xx_DMA64_TXINDEX				0x04
 #define BCM43xx_DMA64_TXRINGLO				0x08
 #define BCM43xx_DMA64_TXRINGHI				0x0C
 #define BCM43xx_DMA64_TXSTATUS				0x10
 #define		BCM43xx_DMA64_TXSTATDPTR		0x00001FFF
 #define		BCM43xx_DMA64_TXSTAT			0xF0000000
 #define			BCM43xx_DMA64_TXSTAT_DISABLED	0x00000000
 #define			BCM43xx_DMA64_TXSTAT_ACTIVE	0x10000000
 #define			BCM43xx_DMA64_TXSTAT_IDLEWAIT	0x20000000
 #define			BCM43xx_DMA64_TXSTAT_STOPPED	0x30000000
 #define			BCM43xx_DMA64_TXSTAT_SUSP	0x40000000
 #define BCM43xx_DMA64_TXERROR				0x14
 #define		BCM43xx_DMA64_TXERRDPTR			0x0001FFFF
 #define		BCM43xx_DMA64_TXERR			0xF0000000
 #define			BCM43xx_DMA64_TXERR_NOERR	0x00000000
 #define			BCM43xx_DMA64_TXERR_PROT	0x10000000
 #define			BCM43xx_DMA64_TXERR_UNDERRUN	0x20000000
 #define			BCM43xx_DMA64_TXERR_TRANSFER	0x30000000
 #define			BCM43xx_DMA64_TXERR_DESCREAD	0x40000000
 #define			BCM43xx_DMA64_TXERR_CORE	0x50000000
 #define BCM43xx_DMA64_RXCTL				0x20
 #define		BCM43xx_DMA64_RXENABLE			0x00000001
 #define		BCM43xx_DMA64_RXFROFF_MASK		0x000000FE
 #define		BCM43xx_DMA64_RXFROFF_SHIFT		1
 #define		BCM43xx_DMA64_RXDIRECTFIFO		0x00000100
 #define		BCM43xx_DMA64_RXADDREXT_MASK		0x00030000
 #define		BCM43xx_DMA64_RXADDREXT_SHIFT		16
 #define BCM43xx_DMA64_RXINDEX				0x24
 #define BCM43xx_DMA64_RXRINGLO				0x28
 #define BCM43xx_DMA64_RXRINGHI				0x2C
 #define BCM43xx_DMA64_RXSTATUS				0x30
 #define		BCM43xx_DMA64_RXSTATDPTR		0x00001FFF
 #define		BCM43xx_DMA64_RXSTAT			0xF0000000
 #define			BCM43xx_DMA64_RXSTAT_DISABLED	0x00000000
 #define			BCM43xx_DMA64_RXSTAT_ACTIVE	0x10000000
 #define			BCM43xx_DMA64_RXSTAT_IDLEWAIT	0x20000000
 #define			BCM43xx_DMA64_RXSTAT_STOPPED	0x30000000
 #define			BCM43xx_DMA64_RXSTAT_SUSP	0x40000000
 #define BCM43xx_DMA64_RXERROR				0x34
 #define		BCM43xx_DMA64_RXERRDPTR			0x0001FFFF
 #define		BCM43xx_DMA64_RXERR			0xF0000000
 #define			BCM43xx_DMA64_RXERR_NOERR	0x00000000
 #define			BCM43xx_DMA64_RXERR_PROT	0x10000000
 #define			BCM43xx_DMA64_RXERR_UNDERRUN	0x20000000
 #define			BCM43xx_DMA64_RXERR_TRANSFER	0x30000000
 #define			BCM43xx_DMA64_RXERR_DESCREAD	0x40000000
 #define			BCM43xx_DMA64_RXERR_CORE	0x50000000

 /* 64-bit DMA descriptor. */
 struct bcm43xx_dmadesc64 {
 	__le32 control0;
 	__le32 control1;
 	__le32 address_low;
 	__le32 address_high;
 } __attribute__((__packed__));
 #define BCM43xx_DMA64_DCTL0_DTABLEEND		0x10000000
 #define BCM43xx_DMA64_DCTL0_IRQ			0x20000000
 #define BCM43xx_DMA64_DCTL0_FRAMEEND		0x40000000
 #define BCM43xx_DMA64_DCTL0_FRAMESTART		0x80000000
 #define BCM43xx_DMA64_DCTL1_BYTECNT		0x00001FFF
 #define BCM43xx_DMA64_DCTL1_ADDREXT_MASK	0x00030000
 #define BCM43xx_DMA64_DCTL1_ADDREXT_SHIFT	16

 /* Address field Routing value. */
 #define BCM43xx_DMA64_ROUTING			0xC0000000
 #define BCM43xx_DMA64_ROUTING_SHIFT		30
 #define		BCM43xx_DMA64_NOTRANS		0x00000000
 #define		BCM43xx_DMA64_CLIENTTRANS	0x80000000


 struct bcm43xx_dmadesc_generic {
 	union {
 		struct bcm43xx_dmadesc32 dma32;
 		struct bcm43xx_dmadesc64 dma64;
 	} __attribute__((__packed__));
 } __attribute__((__packed__));


 /* Misc DMA constants */
 #define BCM43xx_DMA_RINGMEMSIZE		PAGE_SIZE
 #define BCM43xx_DMA0_RX_FRAMEOFFSET	30
 #define BCM43xx_DMA3_RX_FRAMEOFFSET	0


 /* DMA engine tuning knobs */
 #define BCM43xx_TXRING_SLOTS		512
 #define BCM43xx_RXRING_SLOTS		64
 #define BCM43xx_DMA0_RX_BUFFERSIZE	(2304 + 100)
 #define BCM43xx_DMA3_RX_BUFFERSIZE	16
 /* Suspend the tx queue, if less than this percent slots are free. */
 #define BCM43xx_TXSUSPEND_PERCENT	20
 /* Resume the tx queue, if more than this percent slots are free. */
 #define BCM43xx_TXRESUME_PERCENT	50


 #ifdef CONFIG_BCM43XX_DMA


 struct sk_buff;
 struct bcm43xx_private;
 struct bcm43xx_xmitstatus;


 struct bcm43xx_dmadesc_meta {
 	/* The kernel DMA-able buffer. */
 	struct sk_buff *skb;
 	/* DMA base bus-address of the descriptor buffer. */
 	dma_addr_t dmaaddr;
 };

 struct bcm43xx_dmaring {
 	/* Kernel virtual base address of the ring memory. */
 	void *descbase;
 	/* Meta data about all descriptors. */
 	struct bcm43xx_dmadesc_meta *meta;
 	/* DMA Routing value. */
 	u32 routing;
 	/* (Unadjusted) DMA base bus-address of the ring memory. */
 	dma_addr_t dmabase;
 	/* Number of descriptor slots in the ring. */
 	int nr_slots;
 	/* Number of used descriptor slots. */
 	int used_slots;
 	/* Currently used slot in the ring. */
 	int current_slot;
 	/* Marks to suspend/resume the queue. */
 	int suspend_mark;
 	int resume_mark;
 	/* Frameoffset in octets. */
 	u32 frameoffset;
 	/* Descriptor buffer size. */
 	u16 rx_buffersize;
 	/* The MMIO base register of the DMA controller. */
 	u16 mmio_base;
 	/* DMA controller index number (0-5). */
 	int index;
 	/* Boolean. Is this a TX ring? */
 	u8 tx;
 	/* Boolean. 64bit DMA if true, 32bit DMA otherwise. */
 	u8 dma64;
 	/* Boolean. Are transfers suspended on this ring? */
 	u8 suspended;
 	struct bcm43xx_private *bcm;
 #ifdef CONFIG_BCM43XX_DEBUG
 	/* Maximum number of used slots. */
 	int max_used_slots;
 #endif /* CONFIG_BCM43XX_DEBUG*/
 };


 static inline
 int bcm43xx_dma_desc2idx(struct bcm43xx_dmaring *ring,
 			 struct bcm43xx_dmadesc_generic *desc)
 {
 	if (ring->dma64) {
 		struct bcm43xx_dmadesc64 *dd64 = ring->descbase;
 		return (int)(&(desc->dma64) - dd64);
 	} else {
 		struct bcm43xx_dmadesc32 *dd32 = ring->descbase;
 		return (int)(&(desc->dma32) - dd32);
 	}
 }

 static inline
 struct bcm43xx_dmadesc_generic * bcm43xx_dma_idx2desc(struct bcm43xx_dmaring *ring,
 						      int slot,
 						      struct bcm43xx_dmadesc_meta **meta)
 {
 	*meta = &(ring->meta[slot]);
 	if (ring->dma64) {
 		struct bcm43xx_dmadesc64 *dd64 = ring->descbase;
 		return (struct bcm43xx_dmadesc_generic *)(&(dd64[slot]));
 	} else {
 		struct bcm43xx_dmadesc32 *dd32 = ring->descbase;
 		return (struct bcm43xx_dmadesc_generic *)(&(dd32[slot]));
 	}
 }

 static inline
 u32 bcm43xx_dma_read(struct bcm43xx_dmaring *ring,
 		     u16 offset)
 {
 	return bcm43xx_read32(ring->bcm, ring->mmio_base + offset);
 }

 static inline
 void bcm43xx_dma_write(struct bcm43xx_dmaring *ring,
 		       u16 offset, u32 value)
 {
 	bcm43xx_write32(ring->bcm, ring->mmio_base + offset, value);
 }


 int bcm43xx_dma_init(struct bcm43xx_private *bcm);
 void bcm43xx_dma_free(struct bcm43xx_private *bcm);

 int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_private *bcm,
 				   u16 dmacontroller_mmio_base,
 				   int dma64);
 int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_private *bcm,
 				   u16 dmacontroller_mmio_base,
 				   int dma64);

 u16 bcm43xx_dmacontroller_base(int dma64bit, int dmacontroller_idx);

 void bcm43xx_dma_tx_suspend(struct bcm43xx_dmaring *ring);
 void bcm43xx_dma_tx_resume(struct bcm43xx_dmaring *ring);

 void bcm43xx_dma_handle_xmitstatus(struct bcm43xx_private *bcm,
 				   struct bcm43xx_xmitstatus *status);

 int bcm43xx_dma_tx(struct bcm43xx_private *bcm,
 		   struct ieee80211_txb *txb);
 void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring);

 /* Helper function that returns the dma mask for this device. */
 static inline
 u64 bcm43xx_get_supported_dma_mask(struct bcm43xx_private *bcm)
 {
 	int dma64 = bcm43xx_read32(bcm, BCM43xx_CIR_SBTMSTATEHIGH) &
 				   BCM43xx_SBTMSTATEHIGH_DMA64BIT;
 	u16 mmio_base = bcm43xx_dmacontroller_base(dma64, 0);
 	u32 mask = BCM43xx_DMA32_TXADDREXT_MASK;

 	if (dma64)
 		return DMA_64BIT_MASK;
 	bcm43xx_write32(bcm, mmio_base + BCM43xx_DMA32_TXCTL, mask);
 	if (bcm43xx_read32(bcm, mmio_base + BCM43xx_DMA32_TXCTL) & mask)
 		return DMA_32BIT_MASK;
 	return DMA_30BIT_MASK;
 }

 #else /* CONFIG_BCM43XX_DMA */


 static inline
 int bcm43xx_dma_init(struct bcm43xx_private *bcm)
 {
 	return 0;
 }
 static inline
 void bcm43xx_dma_free(struct bcm43xx_private *bcm)
 {
 }
 static inline
 int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_private *bcm,
 				   u16 dmacontroller_mmio_base,
 				   int dma64)
 {
 	return 0;
 }
 static inline
 int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_private *bcm,
 				   u16 dmacontroller_mmio_base,
 				   int dma64)
 {
 	return 0;
 }
 static inline
 int bcm43xx_dma_tx(struct bcm43xx_private *bcm,
 		   struct ieee80211_txb *txb)
 {
 	return 0;
 }
 static inline
 void bcm43xx_dma_handle_xmitstatus(struct bcm43xx_private *bcm,
 				   struct bcm43xx_xmitstatus *status)
 {
 }
 static inline
 void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring)
 {
 }
 static inline
 void bcm43xx_dma_tx_suspend(struct bcm43xx_dmaring *ring)
 {
 }
 static inline
 void bcm43xx_dma_tx_resume(struct bcm43xx_dmaring *ring)
 {
 }

 #endif /* CONFIG_BCM43XX_DMA */
 #endif /* BCM43xx_DMA_H_ */
	#ifndef BCM43xx_DMA_H_
	#define BCM43xx_DMA_H_

	#include <linux/list.h>
	#include <linux/spinlock.h>
	#include <linux/workqueue.h>
	#include <linux/dma-mapping.h>
	#include <linux/linkage.h>
	#include <asm/atomic.h>


	/* DMA-Interrupt reasons. */
	#define BCM43xx_DMAIRQ_FATALMASK ((1 << 10) \| (1 << 11) \| (1 << 12) \
	\| (1 << 14) \| (1 << 15))
	#define BCM43xx_DMAIRQ_NONFATALMASK (1 << 13)
	#define BCM43xx_DMAIRQ_RX_DONE (1 << 16)


	/* 32-bit DMA Engine. */

	/* 32-bit DMA controller registers. */
	#define BCM43xx_DMA32_TXCTL 0x00
	#define BCM43xx_DMA32_TXENABLE 0x00000001
	#define BCM43xx_DMA32_TXSUSPEND 0x00000002
	#define BCM43xx_DMA32_TXLOOPBACK 0x00000004
	#define BCM43xx_DMA32_TXFLUSH 0x00000010
	#define BCM43xx_DMA32_TXADDREXT_MASK 0x00030000
	#define BCM43xx_DMA32_TXADDREXT_SHIFT 16
	#define BCM43xx_DMA32_TXRING 0x04
	#define BCM43xx_DMA32_TXINDEX 0x08
	#define BCM43xx_DMA32_TXSTATUS 0x0C
	#define BCM43xx_DMA32_TXDPTR 0x00000FFF
	#define BCM43xx_DMA32_TXSTATE 0x0000F000
	#define BCM43xx_DMA32_TXSTAT_DISABLED 0x00000000
	#define BCM43xx_DMA32_TXSTAT_ACTIVE 0x00001000
	#define BCM43xx_DMA32_TXSTAT_IDLEWAIT 0x00002000
	#define BCM43xx_DMA32_TXSTAT_STOPPED 0x00003000
	#define BCM43xx_DMA32_TXSTAT_SUSP 0x00004000
	#define BCM43xx_DMA32_TXERROR 0x000F0000
	#define BCM43xx_DMA32_TXERR_NOERR 0x00000000
	#define BCM43xx_DMA32_TXERR_PROT 0x00010000
	#define BCM43xx_DMA32_TXERR_UNDERRUN 0x00020000
	#define BCM43xx_DMA32_TXERR_BUFREAD 0x00030000
	#define BCM43xx_DMA32_TXERR_DESCREAD 0x00040000
	#define BCM43xx_DMA32_TXACTIVE 0xFFF00000
	#define BCM43xx_DMA32_RXCTL 0x10
	#define BCM43xx_DMA32_RXENABLE 0x00000001
	#define BCM43xx_DMA32_RXFROFF_MASK 0x000000FE
	#define BCM43xx_DMA32_RXFROFF_SHIFT 1
	#define BCM43xx_DMA32_RXDIRECTFIFO 0x00000100
	#define BCM43xx_DMA32_RXADDREXT_MASK 0x00030000
	#define BCM43xx_DMA32_RXADDREXT_SHIFT 16
	#define BCM43xx_DMA32_RXRING 0x14
	#define BCM43xx_DMA32_RXINDEX 0x18
	#define BCM43xx_DMA32_RXSTATUS 0x1C
	#define BCM43xx_DMA32_RXDPTR 0x00000FFF
	#define BCM43xx_DMA32_RXSTATE 0x0000F000
	#define BCM43xx_DMA32_RXSTAT_DISABLED 0x00000000
	#define BCM43xx_DMA32_RXSTAT_ACTIVE 0x00001000
	#define BCM43xx_DMA32_RXSTAT_IDLEWAIT 0x00002000
	#define BCM43xx_DMA32_RXSTAT_STOPPED 0x00003000
	#define BCM43xx_DMA32_RXERROR 0x000F0000
	#define BCM43xx_DMA32_RXERR_NOERR 0x00000000
	#define BCM43xx_DMA32_RXERR_PROT 0x00010000
	#define BCM43xx_DMA32_RXERR_OVERFLOW 0x00020000
	#define BCM43xx_DMA32_RXERR_BUFWRITE 0x00030000
	#define BCM43xx_DMA32_RXERR_DESCREAD 0x00040000
	#define BCM43xx_DMA32_RXACTIVE 0xFFF00000

	/* 32-bit DMA descriptor. */
	struct bcm43xx_dmadesc32 {
	__le32 control;
	__le32 address;
	} __attribute__((__packed__));
	#define BCM43xx_DMA32_DCTL_BYTECNT 0x00001FFF
	#define BCM43xx_DMA32_DCTL_ADDREXT_MASK 0x00030000
	#define BCM43xx_DMA32_DCTL_ADDREXT_SHIFT 16
	#define BCM43xx_DMA32_DCTL_DTABLEEND 0x10000000
	#define BCM43xx_DMA32_DCTL_IRQ 0x20000000
	#define BCM43xx_DMA32_DCTL_FRAMEEND 0x40000000
	#define BCM43xx_DMA32_DCTL_FRAMESTART 0x80000000

	/* Address field Routing value. */
	#define BCM43xx_DMA32_ROUTING 0xC0000000
	#define BCM43xx_DMA32_ROUTING_SHIFT 30
	#define BCM43xx_DMA32_NOTRANS 0x00000000
	#define BCM43xx_DMA32_CLIENTTRANS 0x40000000



	/* 64-bit DMA Engine. */

	/* 64-bit DMA controller registers. */
	#define BCM43xx_DMA64_TXCTL 0x00
	#define BCM43xx_DMA64_TXENABLE 0x00000001
	#define BCM43xx_DMA64_TXSUSPEND 0x00000002
	#define BCM43xx_DMA64_TXLOOPBACK 0x00000004
	#define BCM43xx_DMA64_TXFLUSH 0x00000010
	#define BCM43xx_DMA64_TXADDREXT_MASK 0x00030000
	#define BCM43xx_DMA64_TXADDREXT_SHIFT 16
	#define BCM43xx_DMA64_TXINDEX 0x04
	#define BCM43xx_DMA64_TXRINGLO 0x08
	#define BCM43xx_DMA64_TXRINGHI 0x0C
	#define BCM43xx_DMA64_TXSTATUS 0x10
	#define BCM43xx_DMA64_TXSTATDPTR 0x00001FFF
	#define BCM43xx_DMA64_TXSTAT 0xF0000000
	#define BCM43xx_DMA64_TXSTAT_DISABLED 0x00000000
	#define BCM43xx_DMA64_TXSTAT_ACTIVE 0x10000000
	#define BCM43xx_DMA64_TXSTAT_IDLEWAIT 0x20000000
	#define BCM43xx_DMA64_TXSTAT_STOPPED 0x30000000
	#define BCM43xx_DMA64_TXSTAT_SUSP 0x40000000
	#define BCM43xx_DMA64_TXERROR 0x14
	#define BCM43xx_DMA64_TXERRDPTR 0x0001FFFF
	#define BCM43xx_DMA64_TXERR 0xF0000000
	#define BCM43xx_DMA64_TXERR_NOERR 0x00000000
	#define BCM43xx_DMA64_TXERR_PROT 0x10000000
	#define BCM43xx_DMA64_TXERR_UNDERRUN 0x20000000
	#define BCM43xx_DMA64_TXERR_TRANSFER 0x30000000
	#define BCM43xx_DMA64_TXERR_DESCREAD 0x40000000
	#define BCM43xx_DMA64_TXERR_CORE 0x50000000
	#define BCM43xx_DMA64_RXCTL 0x20
	#define BCM43xx_DMA64_RXENABLE 0x00000001
	#define BCM43xx_DMA64_RXFROFF_MASK 0x000000FE
	#define BCM43xx_DMA64_RXFROFF_SHIFT 1
	#define BCM43xx_DMA64_RXDIRECTFIFO 0x00000100
	#define BCM43xx_DMA64_RXADDREXT_MASK 0x00030000
	#define BCM43xx_DMA64_RXADDREXT_SHIFT 16
	#define BCM43xx_DMA64_RXINDEX 0x24
	#define BCM43xx_DMA64_RXRINGLO 0x28
	#define BCM43xx_DMA64_RXRINGHI 0x2C
	#define BCM43xx_DMA64_RXSTATUS 0x30
	#define BCM43xx_DMA64_RXSTATDPTR 0x00001FFF
	#define BCM43xx_DMA64_RXSTAT 0xF0000000
	#define BCM43xx_DMA64_RXSTAT_DISABLED 0x00000000
	#define BCM43xx_DMA64_RXSTAT_ACTIVE 0x10000000
	#define BCM43xx_DMA64_RXSTAT_IDLEWAIT 0x20000000
	#define BCM43xx_DMA64_RXSTAT_STOPPED 0x30000000
	#define BCM43xx_DMA64_RXSTAT_SUSP 0x40000000
	#define BCM43xx_DMA64_RXERROR 0x34
	#define BCM43xx_DMA64_RXERRDPTR 0x0001FFFF
	#define BCM43xx_DMA64_RXERR 0xF0000000
	#define BCM43xx_DMA64_RXERR_NOERR 0x00000000
	#define BCM43xx_DMA64_RXERR_PROT 0x10000000
	#define BCM43xx_DMA64_RXERR_UNDERRUN 0x20000000
	#define BCM43xx_DMA64_RXERR_TRANSFER 0x30000000
	#define BCM43xx_DMA64_RXERR_DESCREAD 0x40000000
	#define BCM43xx_DMA64_RXERR_CORE 0x50000000

	/* 64-bit DMA descriptor. */
	struct bcm43xx_dmadesc64 {
	__le32 control0;
	__le32 control1;
	__le32 address_low;
	__le32 address_high;
	} __attribute__((__packed__));
	#define BCM43xx_DMA64_DCTL0_DTABLEEND 0x10000000
	#define BCM43xx_DMA64_DCTL0_IRQ 0x20000000
	#define BCM43xx_DMA64_DCTL0_FRAMEEND 0x40000000
	#define BCM43xx_DMA64_DCTL0_FRAMESTART 0x80000000
	#define BCM43xx_DMA64_DCTL1_BYTECNT 0x00001FFF
	#define BCM43xx_DMA64_DCTL1_ADDREXT_MASK 0x00030000
	#define BCM43xx_DMA64_DCTL1_ADDREXT_SHIFT 16

	/* Address field Routing value. */
	#define BCM43xx_DMA64_ROUTING 0xC0000000
	#define BCM43xx_DMA64_ROUTING_SHIFT 30
	#define BCM43xx_DMA64_NOTRANS 0x00000000
	#define BCM43xx_DMA64_CLIENTTRANS 0x80000000



	struct bcm43xx_dmadesc_generic {
	union {
	struct bcm43xx_dmadesc32 dma32;
	struct bcm43xx_dmadesc64 dma64;
	} __attribute__((__packed__));
	} __attribute__((__packed__));


	/* Misc DMA constants */
	#define BCM43xx_DMA_RINGMEMSIZE PAGE_SIZE
	#define BCM43xx_DMA0_RX_FRAMEOFFSET 30
	#define BCM43xx_DMA3_RX_FRAMEOFFSET 0


	/* DMA engine tuning knobs */
	#define BCM43xx_TXRING_SLOTS 512
	#define BCM43xx_RXRING_SLOTS 64
	#define BCM43xx_DMA0_RX_BUFFERSIZE (2304 + 100)
	#define BCM43xx_DMA3_RX_BUFFERSIZE 16
	/* Suspend the tx queue, if less than this percent slots are free. */
	#define BCM43xx_TXSUSPEND_PERCENT 20
	/* Resume the tx queue, if more than this percent slots are free. */
	#define BCM43xx_TXRESUME_PERCENT 50



	#ifdef CONFIG_BCM43XX_DMA


	struct sk_buff;
	struct bcm43xx_private;
	struct bcm43xx_xmitstatus;


	struct bcm43xx_dmadesc_meta {
	/* The kernel DMA-able buffer. */
	struct sk_buff *skb;
	/* DMA base bus-address of the descriptor buffer. */
	dma_addr_t dmaaddr;
	};

	struct bcm43xx_dmaring {
	/* Kernel virtual base address of the ring memory. */
	void *descbase;
	/* Meta data about all descriptors. */
	struct bcm43xx_dmadesc_meta *meta;
	/* DMA Routing value. */
	u32 routing;
	/* (Unadjusted) DMA base bus-address of the ring memory. */
	dma_addr_t dmabase;
	/* Number of descriptor slots in the ring. */
	int nr_slots;
	/* Number of used descriptor slots. */
	int used_slots;
	/* Currently used slot in the ring. */
	int current_slot;
	/* Marks to suspend/resume the queue. */
	int suspend_mark;
	int resume_mark;
	/* Frameoffset in octets. */
	u32 frameoffset;
	/* Descriptor buffer size. */
	u16 rx_buffersize;
	/* The MMIO base register of the DMA controller. */
	u16 mmio_base;
	/* DMA controller index number (0-5). */
	int index;
	/* Boolean. Is this a TX ring? */
	u8 tx;
	/* Boolean. 64bit DMA if true, 32bit DMA otherwise. */
	u8 dma64;
	/* Boolean. Are transfers suspended on this ring? */
	u8 suspended;
	struct bcm43xx_private *bcm;
	#ifdef CONFIG_BCM43XX_DEBUG
	/* Maximum number of used slots. */
	int max_used_slots;
	#endif /* CONFIG_BCM43XX_DEBUG*/
	};


	static inline
	int bcm43xx_dma_desc2idx(struct bcm43xx_dmaring *ring,
	struct bcm43xx_dmadesc_generic *desc)
	{
	if (ring->dma64) {
	struct bcm43xx_dmadesc64 *dd64 = ring->descbase;
	return (int)(&(desc->dma64) - dd64);
	} else {
	struct bcm43xx_dmadesc32 *dd32 = ring->descbase;
	return (int)(&(desc->dma32) - dd32);
	}
	}

	static inline
	struct bcm43xx_dmadesc_generic * bcm43xx_dma_idx2desc(struct bcm43xx_dmaring *ring,
	int slot,
	struct bcm43xx_dmadesc_meta **meta)
	{
	*meta = &(ring->meta[slot]);
	if (ring->dma64) {
	struct bcm43xx_dmadesc64 *dd64 = ring->descbase;
	return (struct bcm43xx_dmadesc_generic *)(&(dd64[slot]));
	} else {
	struct bcm43xx_dmadesc32 *dd32 = ring->descbase;
	return (struct bcm43xx_dmadesc_generic *)(&(dd32[slot]));
	}
	}

	static inline
	u32 bcm43xx_dma_read(struct bcm43xx_dmaring *ring,
	u16 offset)
	{
	return bcm43xx_read32(ring->bcm, ring->mmio_base + offset);
	}

	static inline
	void bcm43xx_dma_write(struct bcm43xx_dmaring *ring,
	u16 offset, u32 value)
	{
	bcm43xx_write32(ring->bcm, ring->mmio_base + offset, value);
	}


	int bcm43xx_dma_init(struct bcm43xx_private *bcm);
	void bcm43xx_dma_free(struct bcm43xx_private *bcm);

	int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_private *bcm,
	u16 dmacontroller_mmio_base,
	int dma64);
	int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_private *bcm,
	u16 dmacontroller_mmio_base,
	int dma64);

	u16 bcm43xx_dmacontroller_base(int dma64bit, int dmacontroller_idx);

	void bcm43xx_dma_tx_suspend(struct bcm43xx_dmaring *ring);
	void bcm43xx_dma_tx_resume(struct bcm43xx_dmaring *ring);

	void bcm43xx_dma_handle_xmitstatus(struct bcm43xx_private *bcm,
	struct bcm43xx_xmitstatus *status);

	int bcm43xx_dma_tx(struct bcm43xx_private *bcm,
	struct ieee80211_txb *txb);
	void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring);

	/* Helper function that returns the dma mask for this device. */
	static inline
	u64 bcm43xx_get_supported_dma_mask(struct bcm43xx_private *bcm)
	{
	int dma64 = bcm43xx_read32(bcm, BCM43xx_CIR_SBTMSTATEHIGH) &
	BCM43xx_SBTMSTATEHIGH_DMA64BIT;
	u16 mmio_base = bcm43xx_dmacontroller_base(dma64, 0);
	u32 mask = BCM43xx_DMA32_TXADDREXT_MASK;

	if (dma64)
	return DMA_64BIT_MASK;
	bcm43xx_write32(bcm, mmio_base + BCM43xx_DMA32_TXCTL, mask);
	if (bcm43xx_read32(bcm, mmio_base + BCM43xx_DMA32_TXCTL) & mask)
	return DMA_32BIT_MASK;
	return DMA_30BIT_MASK;
	}

	#else /* CONFIG_BCM43XX_DMA */


	static inline
	int bcm43xx_dma_init(struct bcm43xx_private *bcm)
	{
	return 0;
	}
	static inline
	void bcm43xx_dma_free(struct bcm43xx_private *bcm)
	{
	}
	static inline
	int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_private *bcm,
	u16 dmacontroller_mmio_base,
	int dma64)
	{
	return 0;
	}
	static inline
	int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_private *bcm,
	u16 dmacontroller_mmio_base,
	int dma64)
	{
	return 0;
	}
	static inline
	int bcm43xx_dma_tx(struct bcm43xx_private *bcm,
	struct ieee80211_txb *txb)
	{
	return 0;
	}
	static inline
	void bcm43xx_dma_handle_xmitstatus(struct bcm43xx_private *bcm,
	struct bcm43xx_xmitstatus *status)
	{
	}
	static inline
	void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring)
	{
	}
	static inline
	void bcm43xx_dma_tx_suspend(struct bcm43xx_dmaring *ring)
	{
	}
	static inline
	void bcm43xx_dma_tx_resume(struct bcm43xx_dmaring *ring)
	{
	}

	#endif /* CONFIG_BCM43XX_DMA */
	#endif /* BCM43xx_DMA_H_ */