aic7xxx_osm.h

linux和2410结合开发 用他可以生成2410所需的zImage文件

	uint8_t version1[2];
	uint8_t version2[2];
	uint8_t version3[2];
	uint8_t version4[2];
	uint8_t version5[2];
	uint8_t version6[2];
	uint8_t version7[2];
	uint8_t version8[2];

	uint8_t reserved3[22];

#define	SID_VENDOR_SPECIFIC_1_SIZE	160
	uint8_t vendor_specific1[SID_VENDOR_SPECIFIC_1_SIZE];
};

/********************************** Includes **********************************/
/* Host template and function declarations referenced by the template. */
#include "aic7xxx_linux_host.h"

/* Core driver definitions */
#include "aic7xxx.h"

/* SMP support */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,17)
#include <linux/spinlock.h>
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,93)
#include <linux/smp.h>
#endif

#define AIC7XXX_DRIVER_VERSION  "6.2.4"

/**************************** Front End Queues ********************************/
/*
 * Data structure used to cast the Linux struct scsi_cmnd to something
 * that allows us to use the queue macros.  The linux structure has
 * plenty of space to hold the links fields as required by the queue
 * macros, but the queue macors require them to have the correct type.
 */
struct ahc_cmd_internal {
	/* Area owned by the Linux scsi layer. */
	uint8_t	private[offsetof(struct scsi_cmnd, SCp.Status)];
	union {
		STAILQ_ENTRY(ahc_cmd)	ste;
		LIST_ENTRY(ahc_cmd)	le;
		TAILQ_ENTRY(ahc_cmd)	tqe;
	} links;
	uint32_t			end;
};

struct ahc_cmd {
	union {
		struct ahc_cmd_internal	icmd;
		struct scsi_cmnd	scsi_cmd;
	} un;
};

#define acmd_icmd(cmd) ((cmd)->un.icmd)
#define acmd_scsi_cmd(cmd) ((cmd)->un.scsi_cmd)
#define acmd_links un.icmd.links

/*************************** Device Data Structures ***************************/
/*
 * A per probed device structure used to deal with some error recovery
 * scenarios that the Linux mid-layer code just doesn't know how to
 * handle.  The structure allocated for a device only becomes persistant
 * after a successfully completed inquiry command to the target when
 * that inquiry data indicates a lun is present.
 */
TAILQ_HEAD(ahc_busyq, ahc_cmd);
typedef enum {
	AHC_DEV_UNCONFIGURED	 = 0x01,
	AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
	AHC_DEV_TIMER_ACTIVE	 = 0x04, /* Our timer is active */
	AHC_DEV_ON_RUN_LIST	 = 0x08, /* Queued to be run later */
	AHC_DEV_Q_BASIC		 = 0x10, /* Allow basic device queuing */
	AHC_DEV_Q_TAGGED	 = 0x20, /* Allow full SCSI2 command queueing */
	AHC_DEV_PERIODIC_OTAG	 = 0x40	 /* Send OTAG to prevent starvation */
} ahc_dev_flags;

struct ahc_linux_target;
struct ahc_linux_device {
	TAILQ_ENTRY(ahc_linux_device) links;
	struct		ahc_busyq busyq;

	/*
	 * The number of transactions currently
	 * queued to the device.
	 */
	int		active;

	/*
	 * The currently allowed number of 
	 * transactions that can be queued to
	 * the device.  Must be signed for
	 * conversion from tagged to untagged
	 * mode where the device may have more
	 * than one outstanding active transaction.
	 */
	int		openings;

	/*
	 * A positive count indicates that this
	 * device's queue is halted.
	 */
	u_int		qfrozen;
	
	/*
	 * Cumulative command counter.
	 */
	u_long		commands_issued;

	/*
	 * The number of tagged transactions when
	 * running at our current opening level
	 * that have been successfully received by
	 * this device since the last QUEUE FULL.
	 */
	u_int		tag_success_count;
#define AHC_TAG_SUCCESS_INTERVAL 50

	ahc_dev_flags	flags;

	/*
	 * The high limit for the tags variable.
	 */
	u_int		maxtags;

	/*
	 * The computed number of tags outstanding
	 * at the time of the last QUEUE FULL event.
	 */
	u_int		tags_on_last_queuefull;

	/*
	 * How many times we have seen a queue full
	 * with the same number of tags.  This is used
	 * to stop our adaptive queue depth algorithm
	 * on devices with a fixed number of tags.
	 */
	u_int		last_queuefull_same_count;
#define AHC_LOCK_TAGS_COUNT 50

	/*
	 * How many transactions have been queued
	 * without the device going idle.  We use
	 * this statistic to determine when to issue
	 * an ordered tag to prevent transaction
	 * starvation.  This statistic is only updated
	 * if the AHC_DEV_PERIODIC_OTAG flag is set
	 * on this device.
	 */
	u_int		commands_since_idle_or_otag;
#define AHC_OTAG_THRESH	500

	int		lun;
	struct		ahc_linux_target *target;
};

struct ahc_linux_target {
	struct	ahc_linux_device *devices[AHC_NUM_LUNS];
	int	channel;
	int	target;
	int	refcount;
	struct	ahc_transinfo last_tinfo;
};

/********************* Definitions Required by the Core ***********************/
/*
 * Number of SG segments we require.  So long as the S/G segments for
 * a particular transaction are allocated in a physically contiguous
 * manner and are allocated below 4GB, the number of S/G segments is
 * unrestricted.
 */
#define        AHC_NSEG 128

/*
 * Per-SCB OSM storage.
 */
struct scb_platform_data {
	struct ahc_linux_device	*dev;
	uint32_t		 xfer_len;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
	uint32_t		 resid;		/* Transfer residual */
#endif
};

/*
 * Define a structure used for each host adapter.  All members are
 * aligned on a boundary >= the size of the member to honor the
 * alignment restrictions of the various platforms supported by
 * this driver.
 */
TAILQ_HEAD(ahc_completeq, ahc_cmd);
struct ahc_platform_data {
	/*
	 * Fields accessed from interrupt context.
	 */
	struct ahc_linux_target *targets[AHC_NUM_TARGETS]; 
	TAILQ_HEAD(, ahc_linux_device) device_runq;
	struct ahc_completeq	 completeq;

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
	spinlock_t		 spin_lock;
#endif
	u_int			 qfrozen;
	struct timer_list	 reset_timer;
	struct semaphore	 eh_sem;
	struct Scsi_Host        *host;		/* pointer to scsi host */
	uint32_t		 irq;		/* IRQ for this adapter */
	uint32_t		 bios_address;
	uint32_t		 mem_busaddr;	/* Mem Base Addr */
	bus_addr_t		 hw_dma_mask;
};

/************************** OS Utility Wrappers *******************************/
#define printf printk
#define M_NOWAIT GFP_ATOMIC
#define M_WAITOK 0
#define malloc(size, type, flags) kmalloc(size, flags)
#define free(ptr, type) kfree(ptr)

static __inline void ahc_delay(long);
static __inline void
ahc_delay(long usec)
{
	/*
	 * udelay on Linux can have problems for
	 * multi-millisecond waits.  Wait at most
	 * 1024us per call.
	 */
	while (usec > 0) {
		udelay(usec % 1024);
		usec -= 1024;
	}
}


/***************************** Low Level I/O **********************************/
#if defined(__powerpc__) || defined(__i386__) || defined(__ia64__)
#define MMAPIO
#endif

static __inline uint8_t ahc_inb(struct ahc_softc * ahc, long port);
static __inline void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val);
static __inline void ahc_outsb(struct ahc_softc * ahc, long port,
			       uint8_t *, int count);
static __inline void ahc_insb(struct ahc_softc * ahc, long port,
			       uint8_t *, int count);

static __inline uint8_t
ahc_inb(struct ahc_softc * ahc, long port)
{
	uint8_t x;
#ifdef MMAPIO

	if (ahc->tag == BUS_SPACE_MEMIO) {
		x = readb(ahc->bsh.maddr + port);
	} else {
		x = inb(ahc->bsh.ioport + port);
	}
#else
	x = inb(ahc->bsh.ioport + port);
#endif
	mb();
	return (x);
}

static __inline void
ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
{
#ifdef MMAPIO
	if (ahc->tag == BUS_SPACE_MEMIO) {
		writeb(val, ahc->bsh.maddr + port);
	} else {
		outb(val, ahc->bsh.ioport + port);
	}
#else
	outb(val, ahc->bsh.ioport + port);
#endif
	mb();
}

static __inline void
ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
{
	int i;

	/*
	 * There is probably a more efficient way to do this on Linux
	 * but we don't use this for anything speed critical and this
	 * should work.
	 */
	for (i = 0; i < count; i++)
		ahc_outb(ahc, port, *array++);
}

static __inline void
ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
{
	int i;

	/*
	 * There is probably a more efficient way to do this on Linux
	 * but we don't use this for anything speed critical and this
	 * should work.
	 */
	for (i = 0; i < count; i++)
		*array++ = ahc_inb(ahc, port);
}

/**************************** Initialization **********************************/
int		ahc_linux_register_host(struct ahc_softc *,
					Scsi_Host_Template *);

uint64_t	ahc_linux_get_memsize(void);

/*************************** Pretty Printing **********************************/
struct info_str {
	char *buffer;
	int length;
	off_t offset;
	int pos;
};

void	ahc_format_transinfo(struct info_str *info,
			     struct ahc_transinfo *tinfo);

/******************************** Locking *************************************/
/* Lock protecting internal data structures */
static __inline void ahc_lockinit(struct ahc_softc *);
static __inline void ahc_lock(struct ahc_softc *, unsigned long *flags);
static __inline void ahc_unlock(struct ahc_softc *, unsigned long *flags);

/* Lock held during command compeletion to the upper layer */
static __inline void ahc_done_lockinit(struct ahc_softc *);
static __inline void ahc_done_lock(struct ahc_softc *, unsigned long *flags);
static __inline void ahc_done_unlock(struct ahc_softc *, unsigned long *flags);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,93)
static __inline void
ahc_lockinit(struct ahc_softc *ahc)
{
	spin_lock_init(&ahc->platform_data->spin_lock);
}

static __inline void
ahc_lock(struct ahc_softc *ahc, unsigned long *flags)
{
	*flags = 0;
	spin_lock_irqsave(&ahc->platform_data->spin_lock, *flags);
}

static __inline void
ahc_unlock(struct ahc_softc *ahc, unsigned long *flags)
{
	spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags);
}

static __inline void
ahc_done_lockinit(struct ahc_softc *ahc)
{
	/* We don't own the iorequest lock, so we don't initialize it. */
}

static __inline void
ahc_done_lock(struct ahc_softc *ahc, unsigned long *flags)
{
	*flags = 0;
	spin_lock_irqsave(&io_request_lock, *flags);
}

static __inline void
ahc_done_unlock(struct ahc_softc *ahc, unsigned long *flags)
{
	spin_unlock_irqrestore(&io_request_lock, *flags);
}