include/asm-sparc64/dma.h - linux - Git at Google

 /* $Id: dma.h,v 1.21 2001/12/13 04:16:52 davem Exp $
  * include/asm-sparc64/dma.h
  *
  * Copyright 1996 (C) David S. Miller (davem@caip.rutgers.edu)
  */

 #ifndef _ASM_SPARC64_DMA_H
 #define _ASM_SPARC64_DMA_H

 #include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/spinlock.h>

 #include <asm/sbus.h>
 #include <asm/delay.h>
 #include <asm/oplib.h>

 extern spinlock_t  dma_spin_lock;

 #define claim_dma_lock() \
 ({	unsigned long flags; \
 	spin_lock_irqsave(&dma_spin_lock, flags); \
 	flags; \
 })

 #define release_dma_lock(__flags) \
 	spin_unlock_irqrestore(&dma_spin_lock, __flags);

 /* These are irrelevant for Sparc DMA, but we leave it in so that
  * things can compile.
  */
 #define MAX_DMA_CHANNELS 8
 #define DMA_MODE_READ    1
 #define DMA_MODE_WRITE   2
 #define MAX_DMA_ADDRESS  (~0UL)

 /* Useful constants */
 #define SIZE_16MB      (16*1024*1024)
 #define SIZE_64K       (64*1024)

 /* SBUS DMA controller reg offsets */
 #define DMA_CSR		0x00UL		/* rw  DMA control/status register    0x00   */
 #define DMA_ADDR	0x04UL		/* rw  DMA transfer address register  0x04   */
 #define DMA_COUNT	0x08UL		/* rw  DMA transfer count register    0x08   */
 #define DMA_TEST	0x0cUL		/* rw  DMA test/debug register        0x0c   */

 /* DVMA chip revisions */
 enum dvma_rev {
 	dvmarev0,
 	dvmaesc1,
 	dvmarev1,
 	dvmarev2,
 	dvmarev3,
 	dvmarevplus,
 	dvmahme
 };

 #define DMA_HASCOUNT(rev)  ((rev)==dvmaesc1)

 /* Linux DMA information structure, filled during probe. */
 struct sbus_dma {
 	struct sbus_dma *next;
 	struct sbus_dev *sdev;
 	void __iomem *regs;

 	/* Status, misc info */
 	int node;                /* Prom node for this DMA device */
 	int running;             /* Are we doing DMA now? */
 	int allocated;           /* Are we "owned" by anyone yet? */

 	/* Transfer information. */
 	u32 addr;                /* Start address of current transfer */
 	int nbytes;              /* Size of current transfer */
 	int realbytes;           /* For splitting up large transfers, etc. */

 	/* DMA revision */
 	enum dvma_rev revision;
 };

 extern struct sbus_dma *dma_chain;

 /* Broken hardware... */
 #define DMA_ISBROKEN(dma)    ((dma)->revision == dvmarev1)
 #define DMA_ISESC1(dma)      ((dma)->revision == dvmaesc1)

 /* Main routines in dma.c */
 extern void dvma_init(struct sbus_bus *);

 /* Fields in the cond_reg register */
 /* First, the version identification bits */
 #define DMA_DEVICE_ID    0xf0000000        /* Device identification bits */
 #define DMA_VERS0        0x00000000        /* Sunray DMA version */
 #define DMA_ESCV1        0x40000000        /* DMA ESC Version 1 */
 #define DMA_VERS1        0x80000000        /* DMA rev 1 */
 #define DMA_VERS2        0xa0000000        /* DMA rev 2 */
 #define DMA_VERHME       0xb0000000        /* DMA hme gate array */
 #define DMA_VERSPLUS     0x90000000        /* DMA rev 1 PLUS */

 #define DMA_HNDL_INTR    0x00000001        /* An IRQ needs to be handled */
 #define DMA_HNDL_ERROR   0x00000002        /* We need to take an error */
 #define DMA_FIFO_ISDRAIN 0x0000000c        /* The DMA FIFO is draining */
 #define DMA_INT_ENAB     0x00000010        /* Turn on interrupts */
 #define DMA_FIFO_INV     0x00000020        /* Invalidate the FIFO */
 #define DMA_ACC_SZ_ERR   0x00000040        /* The access size was bad */
 #define DMA_FIFO_STDRAIN 0x00000040        /* DMA_VERS1 Drain the FIFO */
 #define DMA_RST_SCSI     0x00000080        /* Reset the SCSI controller */
 #define DMA_RST_ENET     DMA_RST_SCSI      /* Reset the ENET controller */
 #define DMA_ST_WRITE     0x00000100        /* write from device to memory */
 #define DMA_ENABLE       0x00000200        /* Fire up DMA, handle requests */
 #define DMA_PEND_READ    0x00000400        /* DMA_VERS1/0/PLUS Pending Read */
 #define DMA_ESC_BURST    0x00000800        /* 1=16byte 0=32byte */
 #define DMA_READ_AHEAD   0x00001800        /* DMA read ahead partial longword */
 #define DMA_DSBL_RD_DRN  0x00001000        /* No EC drain on slave reads */
 #define DMA_BCNT_ENAB    0x00002000        /* If on, use the byte counter */
 #define DMA_TERM_CNTR    0x00004000        /* Terminal counter */
 #define DMA_SCSI_SBUS64  0x00008000        /* HME: Enable 64-bit SBUS mode. */
 #define DMA_CSR_DISAB    0x00010000        /* No FIFO drains during csr */
 #define DMA_SCSI_DISAB   0x00020000        /* No FIFO drains during reg */
 #define DMA_DSBL_WR_INV  0x00020000        /* No EC inval. on slave writes */
 #define DMA_ADD_ENABLE   0x00040000        /* Special ESC DVMA optimization */
 #define DMA_E_BURSTS	 0x000c0000	   /* ENET: SBUS r/w burst mask */
 #define DMA_E_BURST32	 0x00040000	   /* ENET: SBUS 32 byte r/w burst */
 #define DMA_E_BURST16	 0x00000000	   /* ENET: SBUS 16 byte r/w burst */
 #define DMA_BRST_SZ      0x000c0000        /* SCSI: SBUS r/w burst size */
 #define DMA_BRST64       0x000c0000        /* SCSI: 64byte bursts (HME on UltraSparc only) */
 #define DMA_BRST32       0x00040000        /* SCSI: 32byte bursts */
 #define DMA_BRST16       0x00000000        /* SCSI: 16byte bursts */
 #define DMA_BRST0        0x00080000        /* SCSI: no bursts (non-HME gate arrays) */
 #define DMA_ADDR_DISAB   0x00100000        /* No FIFO drains during addr */
 #define DMA_2CLKS        0x00200000        /* Each transfer = 2 clock ticks */
 #define DMA_3CLKS        0x00400000        /* Each transfer = 3 clock ticks */
 #define DMA_EN_ENETAUI   DMA_3CLKS         /* Put lance into AUI-cable mode */
 #define DMA_CNTR_DISAB   0x00800000        /* No IRQ when DMA_TERM_CNTR set */
 #define DMA_AUTO_NADDR   0x01000000        /* Use "auto nxt addr" feature */
 #define DMA_SCSI_ON      0x02000000        /* Enable SCSI dma */
 #define DMA_PARITY_OFF   0x02000000        /* HME: disable parity checking */
 #define DMA_LOADED_ADDR  0x04000000        /* Address has been loaded */
 #define DMA_LOADED_NADDR 0x08000000        /* Next address has been loaded */
 #define DMA_RESET_FAS366 0x08000000        /* HME: Assert RESET to FAS366 */

 /* Values describing the burst-size property from the PROM */
 #define DMA_BURST1       0x01
 #define DMA_BURST2       0x02
 #define DMA_BURST4       0x04
 #define DMA_BURST8       0x08
 #define DMA_BURST16      0x10
 #define DMA_BURST32      0x20
 #define DMA_BURST64      0x40
 #define DMA_BURSTBITS    0x7f

 /* Determine highest possible final transfer address given a base */
 #define DMA_MAXEND(addr) (0x01000000UL-(((unsigned long)(addr))&0x00ffffffUL))

 /* Yes, I hack a lot of elisp in my spare time... */
 #define DMA_ERROR_P(regs)  (((sbus_readl((regs) + DMA_CSR) & DMA_HNDL_ERROR))
 #define DMA_IRQ_P(regs)    (((sbus_readl((regs) + DMA_CSR)) & (DMA_HNDL_INTR | DMA_HNDL_ERROR)))
 #define DMA_WRITE_P(regs)  (((sbus_readl((regs) + DMA_CSR) & DMA_ST_WRITE))
 #define DMA_OFF(__regs)		\
 do {	u32 tmp = sbus_readl((__regs) + DMA_CSR); \
 	tmp &= ~DMA_ENABLE; \
 	sbus_writel(tmp, (__regs) + DMA_CSR); \
 } while(0)
 #define DMA_INTSOFF(__regs)	\
 do {	u32 tmp = sbus_readl((__regs) + DMA_CSR); \
 	tmp &= ~DMA_INT_ENAB; \
 	sbus_writel(tmp, (__regs) + DMA_CSR); \
 } while(0)
 #define DMA_INTSON(__regs)	\
 do {	u32 tmp = sbus_readl((__regs) + DMA_CSR); \
 	tmp |= DMA_INT_ENAB; \
 	sbus_writel(tmp, (__regs) + DMA_CSR); \
 } while(0)
 #define DMA_PUNTFIFO(__regs)	\
 do {	u32 tmp = sbus_readl((__regs) + DMA_CSR); \
 	tmp |= DMA_FIFO_INV; \
 	sbus_writel(tmp, (__regs) + DMA_CSR); \
 } while(0)
 #define DMA_SETSTART(__regs, __addr)	\
 	sbus_writel((u32)(__addr), (__regs) + DMA_ADDR);
 #define DMA_BEGINDMA_W(__regs)	\
 do {	u32 tmp = sbus_readl((__regs) + DMA_CSR); \
 	tmp |= (DMA_ST_WRITE|DMA_ENABLE|DMA_INT_ENAB); \
 	sbus_writel(tmp, (__regs) + DMA_CSR); \
 } while(0)
 #define DMA_BEGINDMA_R(__regs)	\
 do {	u32 tmp = sbus_readl((__regs) + DMA_CSR); \
 	tmp |= (DMA_ENABLE|DMA_INT_ENAB); \
 	tmp &= ~DMA_ST_WRITE; \
 	sbus_writel(tmp, (__regs) + DMA_CSR); \
 } while(0)

 /* For certain DMA chips, we need to disable ints upon irq entry
  * and turn them back on when we are done.  So in any ESP interrupt
  * handler you *must* call DMA_IRQ_ENTRY upon entry and DMA_IRQ_EXIT
  * when leaving the handler.  You have been warned...
  */
 #define DMA_IRQ_ENTRY(dma, dregs) do { \
         if(DMA_ISBROKEN(dma)) DMA_INTSOFF(dregs); \
    } while (0)

 #define DMA_IRQ_EXIT(dma, dregs) do { \
 	if(DMA_ISBROKEN(dma)) DMA_INTSON(dregs); \
    } while(0)

 #define for_each_dvma(dma) \
         for((dma) = dma_chain; (dma); (dma) = (dma)->next)

 extern int get_dma_list(char *);
 extern int request_dma(unsigned int, __const__ char *);
 extern void free_dma(unsigned int);

 /* From PCI */

 #ifdef CONFIG_PCI
 extern int isa_dma_bridge_buggy;
 #else
 #define isa_dma_bridge_buggy 	(0)
 #endif

 #endif /* !(_ASM_SPARC64_DMA_H) */
	/* $Id: dma.h,v 1.21 2001/12/13 04:16:52 davem Exp $
	* include/asm-sparc64/dma.h
	*
	* Copyright 1996 (C) David S. Miller (davem@caip.rutgers.edu)
	*/

	#ifndef _ASM_SPARC64_DMA_H
	#define _ASM_SPARC64_DMA_H

	#include <linux/config.h>
	#include <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/spinlock.h>

	#include <asm/sbus.h>
	#include <asm/delay.h>
	#include <asm/oplib.h>

	extern spinlock_t dma_spin_lock;

	#define claim_dma_lock() \
	({ unsigned long flags; \
	spin_lock_irqsave(&dma_spin_lock, flags); \
	flags; \
	})

	#define release_dma_lock(__flags) \
	spin_unlock_irqrestore(&dma_spin_lock, __flags);

	/* These are irrelevant for Sparc DMA, but we leave it in so that
	* things can compile.
	*/
	#define MAX_DMA_CHANNELS 8
	#define DMA_MODE_READ 1
	#define DMA_MODE_WRITE 2
	#define MAX_DMA_ADDRESS (~0UL)

	/* Useful constants */
	#define SIZE_16MB (1610241024)
	#define SIZE_64K (64*1024)

	/* SBUS DMA controller reg offsets */
	#define DMA_CSR 0x00UL /* rw DMA control/status register 0x00 */
	#define DMA_ADDR 0x04UL /* rw DMA transfer address register 0x04 */
	#define DMA_COUNT 0x08UL /* rw DMA transfer count register 0x08 */
	#define DMA_TEST 0x0cUL /* rw DMA test/debug register 0x0c */

	/* DVMA chip revisions */
	enum dvma_rev {
	dvmarev0,
	dvmaesc1,
	dvmarev1,
	dvmarev2,
	dvmarev3,
	dvmarevplus,
	dvmahme
	};

	#define DMA_HASCOUNT(rev) ((rev)==dvmaesc1)

	/* Linux DMA information structure, filled during probe. */
	struct sbus_dma {
	struct sbus_dma *next;
	struct sbus_dev *sdev;
	void __iomem *regs;

	/* Status, misc info */
	int node; /* Prom node for this DMA device */
	int running; /* Are we doing DMA now? */
	int allocated; /* Are we "owned" by anyone yet? */

	/* Transfer information. */
	u32 addr; /* Start address of current transfer */
	int nbytes; /* Size of current transfer */
	int realbytes; /* For splitting up large transfers, etc. */

	/* DMA revision */
	enum dvma_rev revision;
	};

	extern struct sbus_dma *dma_chain;

	/* Broken hardware... */
	#define DMA_ISBROKEN(dma) ((dma)->revision == dvmarev1)
	#define DMA_ISESC1(dma) ((dma)->revision == dvmaesc1)

	/* Main routines in dma.c */
	extern void dvma_init(struct sbus_bus *);

	/* Fields in the cond_reg register */
	/* First, the version identification bits */
	#define DMA_DEVICE_ID 0xf0000000 /* Device identification bits */
	#define DMA_VERS0 0x00000000 /* Sunray DMA version */
	#define DMA_ESCV1 0x40000000 /* DMA ESC Version 1 */
	#define DMA_VERS1 0x80000000 /* DMA rev 1 */
	#define DMA_VERS2 0xa0000000 /* DMA rev 2 */
	#define DMA_VERHME 0xb0000000 /* DMA hme gate array */
	#define DMA_VERSPLUS 0x90000000 /* DMA rev 1 PLUS */

	#define DMA_HNDL_INTR 0x00000001 /* An IRQ needs to be handled */
	#define DMA_HNDL_ERROR 0x00000002 /* We need to take an error */
	#define DMA_FIFO_ISDRAIN 0x0000000c /* The DMA FIFO is draining */
	#define DMA_INT_ENAB 0x00000010 /* Turn on interrupts */
	#define DMA_FIFO_INV 0x00000020 /* Invalidate the FIFO */
	#define DMA_ACC_SZ_ERR 0x00000040 /* The access size was bad */
	#define DMA_FIFO_STDRAIN 0x00000040 /* DMA_VERS1 Drain the FIFO */
	#define DMA_RST_SCSI 0x00000080 /* Reset the SCSI controller */
	#define DMA_RST_ENET DMA_RST_SCSI /* Reset the ENET controller */
	#define DMA_ST_WRITE 0x00000100 /* write from device to memory */
	#define DMA_ENABLE 0x00000200 /* Fire up DMA, handle requests */
	#define DMA_PEND_READ 0x00000400 /* DMA_VERS1/0/PLUS Pending Read */
	#define DMA_ESC_BURST 0x00000800 /* 1=16byte 0=32byte */
	#define DMA_READ_AHEAD 0x00001800 /* DMA read ahead partial longword */
	#define DMA_DSBL_RD_DRN 0x00001000 /* No EC drain on slave reads */
	#define DMA_BCNT_ENAB 0x00002000 /* If on, use the byte counter */
	#define DMA_TERM_CNTR 0x00004000 /* Terminal counter */
	#define DMA_SCSI_SBUS64 0x00008000 /* HME: Enable 64-bit SBUS mode. */
	#define DMA_CSR_DISAB 0x00010000 /* No FIFO drains during csr */
	#define DMA_SCSI_DISAB 0x00020000 /* No FIFO drains during reg */
	#define DMA_DSBL_WR_INV 0x00020000 /* No EC inval. on slave writes */
	#define DMA_ADD_ENABLE 0x00040000 /* Special ESC DVMA optimization */
	#define DMA_E_BURSTS 0x000c0000 /* ENET: SBUS r/w burst mask */
	#define DMA_E_BURST32 0x00040000 /* ENET: SBUS 32 byte r/w burst */
	#define DMA_E_BURST16 0x00000000 /* ENET: SBUS 16 byte r/w burst */
	#define DMA_BRST_SZ 0x000c0000 /* SCSI: SBUS r/w burst size */
	#define DMA_BRST64 0x000c0000 /* SCSI: 64byte bursts (HME on UltraSparc only) */
	#define DMA_BRST32 0x00040000 /* SCSI: 32byte bursts */
	#define DMA_BRST16 0x00000000 /* SCSI: 16byte bursts */
	#define DMA_BRST0 0x00080000 /* SCSI: no bursts (non-HME gate arrays) */
	#define DMA_ADDR_DISAB 0x00100000 /* No FIFO drains during addr */
	#define DMA_2CLKS 0x00200000 /* Each transfer = 2 clock ticks */
	#define DMA_3CLKS 0x00400000 /* Each transfer = 3 clock ticks */
	#define DMA_EN_ENETAUI DMA_3CLKS /* Put lance into AUI-cable mode */
	#define DMA_CNTR_DISAB 0x00800000 /* No IRQ when DMA_TERM_CNTR set */
	#define DMA_AUTO_NADDR 0x01000000 /* Use "auto nxt addr" feature */
	#define DMA_SCSI_ON 0x02000000 /* Enable SCSI dma */
	#define DMA_PARITY_OFF 0x02000000 /* HME: disable parity checking */
	#define DMA_LOADED_ADDR 0x04000000 /* Address has been loaded */
	#define DMA_LOADED_NADDR 0x08000000 /* Next address has been loaded */
	#define DMA_RESET_FAS366 0x08000000 /* HME: Assert RESET to FAS366 */

	/* Values describing the burst-size property from the PROM */
	#define DMA_BURST1 0x01
	#define DMA_BURST2 0x02
	#define DMA_BURST4 0x04
	#define DMA_BURST8 0x08
	#define DMA_BURST16 0x10
	#define DMA_BURST32 0x20
	#define DMA_BURST64 0x40
	#define DMA_BURSTBITS 0x7f

	/* Determine highest possible final transfer address given a base */
	#define DMA_MAXEND(addr) (0x01000000UL-(((unsigned long)(addr))&0x00ffffffUL))

	/* Yes, I hack a lot of elisp in my spare time... */
	#define DMA_ERROR_P(regs) (((sbus_readl((regs) + DMA_CSR) & DMA_HNDL_ERROR))
	#define DMA_IRQ_P(regs) (((sbus_readl((regs) + DMA_CSR)) & (DMA_HNDL_INTR \| DMA_HNDL_ERROR)))
	#define DMA_WRITE_P(regs) (((sbus_readl((regs) + DMA_CSR) & DMA_ST_WRITE))
	#define DMA_OFF(__regs) \
	do { u32 tmp = sbus_readl((__regs) + DMA_CSR); \
	tmp &= ~DMA_ENABLE; \
	sbus_writel(tmp, (__regs) + DMA_CSR); \
	} while(0)
	#define DMA_INTSOFF(__regs) \
	do { u32 tmp = sbus_readl((__regs) + DMA_CSR); \
	tmp &= ~DMA_INT_ENAB; \
	sbus_writel(tmp, (__regs) + DMA_CSR); \
	} while(0)
	#define DMA_INTSON(__regs) \
	do { u32 tmp = sbus_readl((__regs) + DMA_CSR); \
	tmp \|= DMA_INT_ENAB; \
	sbus_writel(tmp, (__regs) + DMA_CSR); \
	} while(0)
	#define DMA_PUNTFIFO(__regs) \
	do { u32 tmp = sbus_readl((__regs) + DMA_CSR); \
	tmp \|= DMA_FIFO_INV; \
	sbus_writel(tmp, (__regs) + DMA_CSR); \
	} while(0)
	#define DMA_SETSTART(__regs, __addr) \
	sbus_writel((u32)(__addr), (__regs) + DMA_ADDR);
	#define DMA_BEGINDMA_W(__regs) \
	do { u32 tmp = sbus_readl((__regs) + DMA_CSR); \
	tmp \|= (DMA_ST_WRITE\|DMA_ENABLE\|DMA_INT_ENAB); \
	sbus_writel(tmp, (__regs) + DMA_CSR); \
	} while(0)
	#define DMA_BEGINDMA_R(__regs) \
	do { u32 tmp = sbus_readl((__regs) + DMA_CSR); \
	tmp \|= (DMA_ENABLE\|DMA_INT_ENAB); \
	tmp &= ~DMA_ST_WRITE; \
	sbus_writel(tmp, (__regs) + DMA_CSR); \
	} while(0)

	/* For certain DMA chips, we need to disable ints upon irq entry
	* and turn them back on when we are done. So in any ESP interrupt
	* handler you must call DMA_IRQ_ENTRY upon entry and DMA_IRQ_EXIT
	* when leaving the handler. You have been warned...
	*/
	#define DMA_IRQ_ENTRY(dma, dregs) do { \
	if(DMA_ISBROKEN(dma)) DMA_INTSOFF(dregs); \
	} while (0)

	#define DMA_IRQ_EXIT(dma, dregs) do { \
	if(DMA_ISBROKEN(dma)) DMA_INTSON(dregs); \
	} while(0)

	#define for_each_dvma(dma) \
	for((dma) = dma_chain; (dma); (dma) = (dma)->next)

	extern int get_dma_list(char *);
	extern int request_dma(unsigned int, __const__ char *);
	extern void free_dma(unsigned int);

	/* From PCI */

	#ifdef CONFIG_PCI
	extern int isa_dma_bridge_buggy;
	#else
	#define isa_dma_bridge_buggy (0)
	#endif

	#endif /* !(_ASM_SPARC64_DMA_H) */