sym53c8xx.c

linux和2410结合开发 用他可以生成2410所需的zImage文件

/*
**	Host flags
*/
#define HF_IN_PM0	1u
#define HF_IN_PM1	(1u<<1)
#define HF_ACT_PM	(1u<<2)
#define HF_DP_SAVED	(1u<<3)
#define HF_AUTO_SENSE	(1u<<4)
#define HF_DATA_IN	(1u<<5)
#define HF_PM_TO_C	(1u<<6)
#define HF_EXT_ERR	(1u<<7)

#ifdef SCSI_NCR_IARB_SUPPORT
#define HF_HINT_IARB	(1u<<7)
#endif

/*
**	This one is stolen from QU_REG.:)
*/
#define HF_DATA_ST	(1u<<7)

/*==========================================================
**
**      Declaration of structs:     Data structure block
**
**==========================================================
**
**	During execution of a ccb by the script processor,
**	the DSA (data structure address) register points
**	to this substructure of the ccb.
**	This substructure contains the header with
**	the script-processor-changable data and
**	data blocks for the indirect move commands.
**
**----------------------------------------------------------
*/

struct dsb {

	/*
	**	Header.
	*/

	struct head	header;

	/*
	**	Table data for Script
	*/

	struct scr_tblsel  select;
	struct scr_tblmove smsg  ;
	struct scr_tblmove smsg_ext ;
	struct scr_tblmove cmd   ;
	struct scr_tblmove sense ;
	struct scr_tblmove wresid;
	struct scr_tblmove data [MAX_SCATTER];

	/*
	**	Phase mismatch contexts.
	**	We need two to handle correctly the
	**	SAVED DATA POINTER.
	*/

	struct pm_ctx pm0;
	struct pm_ctx pm1;
};


/*========================================================================
**
**      Declaration of structs:     Command control block.
**
**========================================================================
*/
struct ccb {
	/*----------------------------------------------------------------
	**	This is the data structure which is pointed by the DSA 
	**	register when it is executed by the script processor.
	**	It must be the first entry.
	**----------------------------------------------------------------
	*/
	struct dsb	phys;

	/*----------------------------------------------------------------
	**	The general SCSI driver provides a
	**	pointer to a control block.
	**----------------------------------------------------------------
	*/
	Scsi_Cmnd	*cmd;		/* SCSI command 		*/
	u_char		cdb_buf[16];	/* Copy of CDB			*/
	u_char		sense_buf[64];
	int		data_len;	/* Total data length		*/
	int		segments;	/* Number of SG segments	*/

	/*----------------------------------------------------------------
	**	Message areas.
	**	We prepare a message to be sent after selection.
	**	We may use a second one if the command is rescheduled 
	**	due to CHECK_CONDITION or QUEUE FULL status.
	**      Contents are IDENTIFY and SIMPLE_TAG.
	**	While negotiating sync or wide transfer,
	**	a SDTR or WDTR message is appended.
	**----------------------------------------------------------------
	*/
	u_char		scsi_smsg [12];
	u_char		scsi_smsg2[12];

	/*----------------------------------------------------------------
	**	Miscellaneous status'.
	**----------------------------------------------------------------
	*/
	u_char		nego_status;	/* Negotiation status		*/
	u_char		xerr_status;	/* Extended error flags		*/
	u_int32		extra_bytes;	/* Extraneous bytes transferred	*/

	/*----------------------------------------------------------------
	**	Saved info for auto-sense
	**----------------------------------------------------------------
	*/
	u_char		sv_scsi_status;
	u_char		sv_xerr_status;

	/*----------------------------------------------------------------
	**	Other fields.
	**----------------------------------------------------------------
	*/
	u_long		p_ccb;		/* BUS address of this CCB	*/
	u_char		sensecmd[6];	/* Sense command		*/
	u_char		to_abort;	/* This CCB is to be aborted	*/
	u_short		tag;		/* Tag for this transfer	*/
					/*  NO_TAG means no tag		*/
	u_char		tags_si;	/* Lun tags sum index (0,1)	*/

	u_char		target;
	u_char		lun;
	u_short		queued;
	ccb_p		link_ccb;	/* Host adapter CCB chain	*/
	ccb_p		link_ccbh;	/* Host adapter CCB hash chain	*/
	XPT_QUEHEAD	link_ccbq;	/* Link to unit CCB queue	*/
	u_int32		startp;		/* Initial data pointer		*/
	u_int32		lastp0;		/* Initial 'lastp'		*/
	int		ext_sg;		/* Extreme data pointer, used	*/
	int		ext_ofs;	/*  to calculate the residual.	*/
	int		resid;
};

#define CCB_PHYS(cp,lbl)	(cp->p_ccb + offsetof(struct ccb, lbl))


/*========================================================================
**
**      Declaration of structs:     NCR device descriptor
**
**========================================================================
*/
struct ncb {
	/*----------------------------------------------------------------
	**	Idle task and invalid task actions and their bus
	**	addresses.
	**----------------------------------------------------------------
	*/
	struct action	idletask;
	struct action	notask;
	struct action	bad_i_t_l;
	struct action	bad_i_t_l_q;
	u_long		p_idletask;
	u_long		p_notask;
	u_long		p_bad_i_t_l;
	u_long		p_bad_i_t_l_q;

	/*----------------------------------------------------------------
	**	Dummy lun table to protect us against target returning bad  
	**	lun number on reselection.
	**----------------------------------------------------------------
	*/
	u_int32		*badluntbl;	/* Table physical address	*/
	u_int32		resel_badlun;	/* SCRIPT handler BUS address	*/

	/*----------------------------------------------------------------
	**	Bit 32-63 of the on-chip RAM bus address in LE format.
	**	The START_RAM64 script loads the MMRS and MMWS from this 
	**	field.
	**----------------------------------------------------------------
	*/
	u_int32		scr_ram_seg;

	/*----------------------------------------------------------------
	**	CCBs management queues.
	**----------------------------------------------------------------
	*/
	Scsi_Cmnd	*waiting_list;	/* Commands waiting for a CCB	*/
					/*  when lcb is not allocated.	*/
	Scsi_Cmnd	*done_list;	/* Commands waiting for done()  */
					/* callback to be invoked.      */ 
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
	spinlock_t	smp_lock;	/* Lock for SMP threading       */
#endif

	/*----------------------------------------------------------------
	**	Chip and controller indentification.
	**----------------------------------------------------------------
	*/
	int		unit;		/* Unit number			*/
	char		chip_name[8];	/* Chip name			*/
	char		inst_name[16];	/* ncb instance name		*/

	/*----------------------------------------------------------------
	**	Initial value of some IO register bits.
	**	These values are assumed to have been set by BIOS, and may 
	**	be used for probing adapter implementation differences.
	**----------------------------------------------------------------
	*/
	u_char	sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4,
		sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4, sv_stest1, sv_scntl4;

	/*----------------------------------------------------------------
	**	Actual initial value of IO register bits used by the 
	**	driver. They are loaded at initialisation according to  
	**	features that are to be enabled.
	**----------------------------------------------------------------
	*/
	u_char	rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4, 
		rv_ctest5, rv_stest2, rv_ccntl0, rv_ccntl1, rv_scntl4;

	/*----------------------------------------------------------------
	**	Target data.
	**	Target control block bus address array used by the SCRIPT 
	**	on reselection.
	**----------------------------------------------------------------
	*/
	struct tcb	target[MAX_TARGET];
	u_int32		*targtbl;

	/*----------------------------------------------------------------
	**	Virtual and physical bus addresses of the chip.
	**----------------------------------------------------------------
	*/
#ifndef SCSI_NCR_PCI_MEM_NOT_SUPPORTED
	u_long		base_va;	/* MMIO base virtual address	*/
	u_long		base2_va;	/* On-chip RAM virtual address	*/
#endif
	u_long		base_ba;	/* MMIO base bus address	*/
	u_long		base_io;	/* IO space base address	*/
	u_long		base_ws;	/* (MM)IO window size		*/
	u_long		base2_ba;	/* On-chip RAM bus address	*/
	u_long		base2_ws;	/* On-chip RAM window size	*/
	u_int		irq;		/* IRQ number			*/
	volatile			/* Pointer to volatile for 	*/
	struct ncr_reg	*reg;		/*  memory mapped IO.		*/

	/*----------------------------------------------------------------
	**	SCRIPTS virtual and physical bus addresses.
	**	'script'  is loaded in the on-chip RAM if present.
	**	'scripth' stays in main memory for all chips except the 
	**	53C895A and 53C896 that provide 8K on-chip RAM.
	**----------------------------------------------------------------
	*/
	struct script	*script0;	/* Copies of script and scripth	*/
	struct scripth	*scripth0;	/*  relocated for this ncb.	*/
	u_long		p_script;	/* Actual script and scripth	*/
	u_long		p_scripth;	/*  bus addresses.		*/
	u_long		p_scripth0;

	/*----------------------------------------------------------------
	**	General controller parameters and configuration.
	**----------------------------------------------------------------
	*/
	pcidev_t	pdev;
	u_short		device_id;	/* PCI device id		*/
	u_char		revision_id;	/* PCI device revision id	*/
	u_char		bus;		/* PCI BUS number		*/
	u_char		device_fn;	/* PCI BUS device and function	*/
	u_char		myaddr;		/* SCSI id of the adapter	*/
	u_char		maxburst;	/* log base 2 of dwords burst	*/
	u_char		maxwide;	/* Maximum transfer width	*/
	u_char		minsync;	/* Minimum sync period factor	*/
	u_char		maxsync;	/* Maximum sync period factor	*/
	u_char		maxoffs;	/* Max scsi offset		*/
	u_char		maxoffs_st;	/* Max scsi offset in ST mode	*/
	u_char		multiplier;	/* Clock multiplier (1,2,4)	*/
	u_char		clock_divn;	/* Number of clock divisors	*/
	u_long		clock_khz;	/* SCSI clock frequency in KHz	*/
	u_int		features;	/* Chip features map		*/

	/*----------------------------------------------------------------
	**	Range for the PCI clock frequency measurement result
	**	that ensures the algorithm used by the driver can be 
	**	trusted for the SCSI clock frequency measurement.
	**	(Assuming a PCI clock frequency of 33 MHz).
	**----------------------------------------------------------------
	*/
	u_int		pciclock_min;
	u_int		pciclock_max;

	/*----------------------------------------------------------------
	**	Start queue management.
	**	It is filled up by the host processor and accessed by the 
	**	SCRIPTS processor in order to start SCSI commands.
	**----------------------------------------------------------------
	*/
	u_long		p_squeue;	/* Start queue BUS address	*/
	u_int32		*squeue;	/* Start queue virtual address	*/
	u_short		squeueput;	/* Next free slot of the queue	*/
	u_short		actccbs;	/* Number of allocated CCBs	*/
	u_short		queuedepth;	/* Start queue depth		*/

	/*----------------------------------------------------------------
	**	Command completion queue.
	**	It is the same size as the start queue to avoid overflow.
	**----------------------------------------------------------------
	*/
	u_short		dqueueget;	/* Next position to scan	*/
	u_int32		*dqueue;	/* Completion (done) queue	*/

	/*----------------------------------------------------------------
	**	Timeout handler.
	**----------------------------------------------------------------
	*/
	struct timer_list timer;	/* Timer handler link header	*/
	u_long		lasttime;
	u_long		settle_time;	/* Resetting the SCSI BUS	*/

	/*----------------------------------------------------------------
	**	Debugging and profiling.
	**----------------------------------------------------------------
	*/
	struct ncr_reg	regdump;	/* Register dump		*/
	u_long		regtime;	/* Time it has been done	*/

	/*----------------------------------------------------------------
	**	Miscellaneous buffers accessed by the scripts-processor.
	**	They shall be DWORD aligned, because they may be read or 
	**	written with a script command.
	**----------------------------------------------------------------
	*/
	u_char		msgout[12];	/* Buffer for MESSAGE OUT 	*/
	u_char		msgin [12];	/* Buffer for MESSAGE IN	*/
	u_int32		lastmsg;	/* Last SCSI message sent	*/
	u_char		scratch;	/* Scratch for SCSI receive	*/

	/*----------------------------------------------------------------
	**	Miscellaneous configuration and status parameters.
	**----------------------------------------------------------------
	*/
	u_char		scsi_mode;	/* Current SCSI BUS mode	*/
	u_char		order;		/* Tag order to use		*/
	u_char		verbose;	/* Verbosity for this controller*/
	u_int32		ncr_cache;	/* Used for cache test at init.	*/
	u_long		p_ncb;		/* BUS address of this NCB	*/

	/*----------------------------------------------------------------
	**	CCB lists and queue.
	**----------------------------------------------------------------
	*/
	ccb_p ccbh[CCB_HASH_SIZE];	/* CCB hashed by DSA value	*/
	struct ccb	*ccbc;		/* CCB chain			*/
	XPT_QUEHEAD	free_ccbq;	/* Queue of available CCBs	*/

	/*----------------------------------------------------------------
	**	IMMEDIATE ARBITRATION (IARB) control.
	**	We keep track in 'last_cp' of the last CCB that has been 
	**	queued to the SCRIPTS processor and clear 'last_cp' when 
	**	this CCB completes. If last_cp is not zero at the moment 
	**	we queue a new CCB, we set a flag in 'last_cp' that is 
	**	used by the SCRIPTS as a hint for setting IARB.
	**	We donnot set more than 'iarb_max' consecutive hints for 
	**	IARB in order to leave devices a chance to reselect.
	**	By the way, any non zero value of 'iarb_max' is unfair. :)
	**----------------------------------------------------------------
	*/
#ifdef SCSI_NCR_IARB_SUPPORT
	struct ccb	*last_cp;	/* Last queud CCB used for IARB	*/
	u_short		iarb_max;	/* Max. # consecutive IARB hints*/
	u_short		iarb_count;	/* Actual # of these hints	*/
#endif

	/*----------------------------------------------------------------
	**	We need the LCB in order to handle disconnections and 
	**	to count active CCBs for task management. So, we use 
	**	a unique CCB for LUNs we donnot have the LCB yet.
	**	This queue normally should have at most 1 element.
	**----------------------------------------------------------------
	*/
	XPT_QUEHEAD	b0_ccbq;

	/*----------------------------------------------------------------
	**	We use a different scatter function for 896 rev 1.
	**----------------------------------------------------------------
	*/
	int (*scatter) (ncb_p, ccb_p, Scsi_Cmnd *);

	/*----------------------------------------------------------------
	**	Command abort handling.
	**	We need to synchronize tightly with the SCRIPTS 
	**	processor in order to handle things correctly.
	**----------------------------------------------------------------
	*/
	u_char		abrt_msg[4];	/* Message to send buffer	*/
	struct scr_tblmove abrt_tbl;	/* Table for the MOV of it 	*/
	struct scr_tblsel  abrt_sel;	/* Sync params for selection	*/
	u_char		istat_sem;	/* Tells the chip to stop (SEM)	*/

	/*----------------------------------------------------------------
	**	Fields that should be removed or changed.
	**----------------------------------------------------------------
	*/
	struct usrcmd	user;		/* Command from user		*/
	volatile u_char	release_stage;	/* Synchronisation stage on release  */

	/*----------------------------------------------------------------
	**	Fields that are used (primarily) for integrity check
	**----------------------------------------------------------------
	*/
	unsigned char  check_integrity; /* Enable midlayer integ. check on
					 * bus scan. */
#ifdef	SCSI_NCR_INTEGRITY_CHECKING
	unsigned char check_integ_par;	/* Set if par or Init. Det. error
					 * used only during integ check */
#endif
};

#define NCB_PHYS(np, lbl)	 (np->p_ncb + offsetof(struct ncb, lbl))
#define NCB_SCRIPT_PHYS(np,lbl)	 (np->p_script  + offsetof (struct script, lbl))
#define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
#define NCB_SCRIPTH0_PHYS(np,lbl) (np->p_scripth0+offsetof (struct scripth,lbl))

/*==========================================================
**
**
**      Script for NCR-Processor.
**
**	Use ncr_script_fill() to create the variable parts.
**	Use ncr_script_copy_and_bind() to make a copy and
**	bind to physical addresses.
**
**
**==========================================================
**
**	We have to know the offsets of all labels before
**	we reach them (for forward jumps).
**	Therefore we declare a struct here.
**	If you make changes inside the script,
**	DONT FORGET TO CHANGE THE LENGTHS HERE!
**
**----------------------------------------------------------
*/

/*
**	Script fragments which are loaded into the on-chip RAM 
**	of 825A, 875, 876, 895, 895A and 896 chips.
*/
struct script {
	ncrcmd	start		[ 14];
	ncrcmd	getjob_begin	[  4];
	ncrcmd	getjob_end	[  4];
	ncrcmd	select		[  8];
	ncrcmd	wf_sel_done	[  2];
	ncrcmd	send_ident	[  2];
#ifdef SCSI_NCR_IARB_SUPPORT
	ncrcmd	select2		[  8];
#else
	ncrc