aic7xxx.h

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

	uint16_t res_1[10];		/* words 20-29 */
	uint16_t signature;		/* Signature == 0x250 */
#define		CFSIGNATURE	0x250
#define		CFSIGNATURE2	0x300
	uint16_t checksum;		/* word 31 */
};

/****************************  Message Buffer *********************************/
typedef enum {
	MSG_TYPE_NONE			= 0x00,
	MSG_TYPE_INITIATOR_MSGOUT	= 0x01,
	MSG_TYPE_INITIATOR_MSGIN	= 0x02,
	MSG_TYPE_TARGET_MSGOUT		= 0x03,
	MSG_TYPE_TARGET_MSGIN		= 0x04
} ahc_msg_type;

typedef enum {
	MSGLOOP_IN_PROG,
	MSGLOOP_MSGCOMPLETE,
	MSGLOOP_TERMINATED
} msg_loop_stat;

/*********************** Software Configuration Structure *********************/
TAILQ_HEAD(scb_tailq, scb);

struct ahc_suspend_channel_state {
	uint8_t	scsiseq;
	uint8_t	sxfrctl0;
	uint8_t	sxfrctl1;
	uint8_t	simode0;
	uint8_t	simode1;
	uint8_t	seltimer;
	uint8_t	seqctl;
};

struct ahc_suspend_state {
	struct	ahc_suspend_channel_state channel[2];
	uint8_t	optionmode;
	uint8_t	dscommand0;
	uint8_t	dspcistatus;
	/* hsmailbox */
	uint8_t	crccontrol1;
	uint8_t	scbbaddr;
	/* Host and sequencer SCB counts */
	uint8_t	dff_thrsh;
	uint8_t	*scratch_ram;
	uint8_t	*btt;
};

typedef void (*ahc_bus_intr_t)(struct ahc_softc *);

struct ahc_softc {
	bus_space_tag_t           tag;
	bus_space_handle_t        bsh;
#ifndef __linux__
	bus_dma_tag_t		  buffer_dmat;   /* dmat for buffer I/O */
#endif
	struct scb_data		 *scb_data;

	struct scb		 *next_queued_scb;

	/*
	 * SCBs that have been sent to the controller
	 */
	LIST_HEAD(, scb)	  pending_scbs;

	/*
	 * Counting lock for deferring the release of additional
	 * untagged transactions from the untagged_queues.  When
	 * the lock is decremented to 0, all queues in the
	 * untagged_queues array are run.
	 */
	u_int			  untagged_queue_lock;

	/*
	 * Per-target queue of untagged-transactions.  The
	 * transaction at the head of the queue is the
	 * currently pending untagged transaction for the
	 * target.  The driver only allows a single untagged
	 * transaction per target.
	 */
	struct scb_tailq	  untagged_queues[AHC_NUM_TARGETS];

	/*
	 * Platform specific data.
	 */
	struct ahc_platform_data *platform_data;

	/*
	 * Platform specific device information.
	 */
	ahc_dev_softc_t		  dev_softc;

	/*
	 * Bus specific device information.
	 */
	ahc_bus_intr_t		  bus_intr;

	/*
	 * Target mode related state kept on a per enabled lun basis.
	 * Targets that are not enabled will have null entries.
	 * As an initiator, we keep one target entry for our initiator
	 * ID to store our sync/wide transfer settings.
	 */
	struct ahc_tmode_tstate  *enabled_targets[AHC_NUM_TARGETS];

	/*
	 * The black hole device responsible for handling requests for
	 * disabled luns on enabled targets.
	 */
	struct ahc_tmode_lstate  *black_hole;

	/*
	 * Device instance currently on the bus awaiting a continue TIO
	 * for a command that was not given the disconnect priveledge.
	 */
	struct ahc_tmode_lstate  *pending_device;

	/*
	 * Card characteristics
	 */
	ahc_chip		  chip;
	ahc_feature		  features;
	ahc_bug			  bugs;
	ahc_flag		  flags;

	/* Values to store in the SEQCTL register for pause and unpause */
	uint8_t			  unpause;
	uint8_t			  pause;

	/* Command Queues */
	uint8_t			  qoutfifonext;
	uint8_t			  qinfifonext;
	uint8_t			 *qoutfifo;
	uint8_t			 *qinfifo;

	/* Critical Section Data */
	struct cs		 *critical_sections;
	u_int			  num_critical_sections;

	/* Links for chaining softcs */
	TAILQ_ENTRY(ahc_softc)	  links;

	/* Channel Names ('A', 'B', etc.) */
	char			  channel;
	char			  channel_b;

	/* Initiator Bus ID */
	uint8_t			  our_id;
	uint8_t			  our_id_b;

	/*
	 * PCI error detection.
	 */
	int			  unsolicited_ints;

	/*
	 * Target incoming command FIFO.
	 */
	struct target_cmd	 *targetcmds;
	uint8_t			  tqinfifonext;

	/*
	 * Incoming and outgoing message handling.
	 */
	uint8_t			  send_msg_perror;
	ahc_msg_type		  msg_type;
	uint8_t			  msgout_buf[12];/* Message we are sending */
	uint8_t			  msgin_buf[12];/* Message we are receiving */
	u_int			  msgout_len;	/* Length of message to send */
	u_int			  msgout_index;	/* Current index in msgout */
	u_int			  msgin_index;	/* Current index in msgin */

	/*
	 * Mapping information for data structures shared
	 * between the sequencer and kernel.
	 */
	bus_dma_tag_t		  parent_dmat;
	bus_dma_tag_t		  shared_data_dmat;
	bus_dmamap_t		  shared_data_dmamap;
	bus_addr_t		  shared_data_busaddr;

	/*
	 * Bus address of the one byte buffer used to
	 * work-around a DMA bug for chips <= aic7880
	 * in target mode.
	 */
	bus_addr_t		  dma_bug_buf;

	/* Information saved through suspend/resume cycles */
	struct ahc_suspend_state  suspend_state;

	/* Number of enabled target mode device on this card */
	u_int			  enabled_luns;

	/* Initialization level of this data structure */
	u_int			  init_level;

	/* PCI cacheline size. */
	u_int			  pci_cachesize;

	/* Per-Unit descriptive information */
	const char		 *description;
	char			 *name;
	int			  unit;

	/* Selection Timer settings */
	int			  seltime;
	int			  seltime_b;

	uint16_t	 	  user_discenable;/* Disconnection allowed  */
	uint16_t		  user_tagenable;/* Tagged Queuing allowed */
};

TAILQ_HEAD(ahc_softc_tailq, ahc_softc);
extern struct ahc_softc_tailq ahc_tailq;

/************************ Active Device Information ***************************/
typedef enum {
	ROLE_UNKNOWN,
	ROLE_INITIATOR,
	ROLE_TARGET
} role_t;

struct ahc_devinfo {
	int	 our_scsiid;
	int	 target_offset;
	uint16_t target_mask;
	u_int	 target;
	u_int	 lun;
	char	 channel;
	role_t	 role;		/*
				 * Only guaranteed to be correct if not
				 * in the busfree state.
				 */
};

/****************************** PCI Structures ********************************/
typedef int (ahc_device_setup_t)(struct ahc_softc *);

struct ahc_pci_identity {
	uint64_t		 full_id;
	uint64_t		 id_mask;
	char			*name;
	ahc_device_setup_t	*setup;
};
extern struct ahc_pci_identity ahc_pci_ident_table [];
extern const u_int ahc_num_pci_devs;

/***************************** VL/EISA Declarations ***************************/
struct aic7770_identity {
	uint32_t		 full_id;
	uint32_t		 id_mask;
	char			*name;
	ahc_device_setup_t	*setup;
};
extern struct aic7770_identity aic7770_ident_table [];
extern const int ahc_num_aic7770_devs;

#define AHC_EISA_SLOT_OFFSET	0xc00
#define AHC_EISA_IOSIZE		0x100

/*************************** Function Declarations ****************************/
/******************************************************************************/
u_int			ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl);
void			ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl);
void			ahc_busy_tcl(struct ahc_softc *ahc,
				     u_int tcl, u_int busyid);

/***************************** PCI Front End *********************************/
struct ahc_pci_identity	*ahc_find_pci_device(ahc_dev_softc_t);
int			 ahc_pci_config(struct ahc_softc *,
					struct ahc_pci_identity *);

/*************************** EISA/VL Front End ********************************/
struct aic7770_identity *aic7770_find_device(uint32_t);
int			 aic7770_config(struct ahc_softc *ahc,
					struct aic7770_identity *);

/************************** SCB and SCB queue management **********************/
int		ahc_probe_scbs(struct ahc_softc *);
void		ahc_run_untagged_queues(struct ahc_softc *ahc);
void		ahc_run_untagged_queue(struct ahc_softc *ahc,
				       struct scb_tailq *queue);
void		ahc_qinfifo_requeue_tail(struct ahc_softc *ahc,
					 struct scb *scb);
int		ahc_match_scb(struct ahc_softc *ahc, struct scb *scb,
			      int target, char channel, int lun,
			      u_int tag, role_t role);

/****************************** Initialization ********************************/
struct ahc_softc	*ahc_alloc(void *platform_arg, char *name);
int			 ahc_softc_init(struct ahc_softc *);
void			 ahc_controller_info(struct ahc_softc *ahc, char *buf);
int			 ahc_init(struct ahc_softc *ahc);
void			 ahc_intr_enable(struct ahc_softc *ahc, int enable);
void			 ahc_pause_and_flushwork(struct ahc_softc *ahc);
int			 ahc_suspend(struct ahc_softc *ahc); 
int			 ahc_resume(struct ahc_softc *ahc);
void			 ahc_softc_insert(struct ahc_softc *);
void			 ahc_set_unit(struct ahc_softc *, int);
void			 ahc_set_name(struct ahc_softc *, char *);
void			 ahc_alloc_scbs(struct ahc_softc *ahc);
void			 ahc_free(struct ahc_softc *ahc);
int			 ahc_reset(struct ahc_softc *ahc);
void			 ahc_shutdown(void *arg);

/*************************** Interrupt Services *******************************/
void			ahc_pci_intr(struct ahc_softc *ahc);
void			ahc_clear_intstat(struct ahc_softc *ahc);
void			ahc_run_qoutfifo(struct ahc_softc *ahc);
#ifdef AHC_TARGET_MODE
void			ahc_run_tqinfifo(struct ahc_softc *ahc, int paused);
#endif
void			ahc_handle_brkadrint(struct ahc_softc *ahc);
void			ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat);
void			ahc_handle_scsiint(struct ahc_softc *ahc,
					   u_int intstat);
void			ahc_clear_critical_section(struct ahc_softc *ahc);

/***************************** Error Recovery *********************************/
typedef enum {
	SEARCH_COMPLETE,
	SEARCH_COUNT,
	SEARCH_REMOVE
} ahc_search_action;
int			ahc_search_qinfifo(struct ahc_softc *ahc, int target,
					   char channel, int lun, u_int tag,
					   role_t role, uint32_t status,
					   ahc_search_action action);
int			ahc_search_disc_list(struct ahc_softc *ahc, int target,
					     char channel, int lun, u_int tag,
					     int stop_on_first, int remove,
					     int save_state);
void			ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
int			ahc_reset_channel(struct ahc_softc *ahc, char channel,
					  int initiate_reset);
int			ahc_abort_scbs(struct ahc_softc *ahc, int target,
				       char channel, int lun, u_int tag,
				       role_t role, uint32_t status);
void			ahc_restart(struct ahc_softc *ahc);
void			ahc_calc_residual(struct scb *scb);
/*************************** Utility Functions ********************************/
struct ahc_phase_table_entry*
			ahc_lookup_phase_entry(int phase);
void			ahc_compile_devinfo(struct ahc_devinfo *devinfo,
					    u_int our_id, u_int target,
					    u_int lun, char channel,
					    role_t role);
/************************** Transfer Negotiation ******************************/
struct ahc_syncrate*	ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
					  u_int *ppr_options, u_int maxsync);
u_int			ahc_find_period(struct ahc_softc *ahc,
					u_int scsirate, u_int maxsync);
void			ahc_validate_offset(struct ahc_softc *ahc,
					    struct ahc_initiator_tinfo *tinfo,
					    struct ahc_syncrate *syncrate,
					    u_int *offset, int wide,
					    role_t role);
void			ahc_validate_width(struct ahc_softc *ahc,
					   struct ahc_initiator_tinfo *tinfo,
					   u_int *bus_width,
					   role_t role);
int			ahc_update_neg_request(struct ahc_softc*,
					       struct ahc_devinfo*,
					       struct ahc_tmode_tstate*,
					       struct ahc_initiator_tinfo*,
					       int /*force*/);
void			ahc_set_width(struct ahc_softc *ahc,
				      struct ahc_devinfo *devinfo,
				      u_int width, u_int type, int paused);
void			ahc_set_syncrate(struct ahc_softc *ahc,
					 struct ahc_devinfo *devinfo,
					 struct ahc_syncrate *syncrate,
					 u_int period, u_int offset,
					 u_int ppr_options,
					 u_int type, int paused);
typedef enum {
	AHC_QUEUE_NONE,
	AHC_QUEUE_BASIC,
	AHC_QUEUE_TAGGED
} ahc_queue_alg;

void			ahc_set_tags(struct ahc_softc *ahc,
				     struct ahc_devinfo *devinfo,
				     ahc_queue_alg alg);

/**************************** Target Mode *************************************/
#ifdef AHC_TARGET_MODE
void		ahc_send_lstate_events(struct ahc_softc *,
				       struct ahc_tmode_lstate *);
void		ahc_handle_en_lun(struct ahc_softc *ahc,
				  struct cam_sim *sim, union ccb *ccb);
cam_status	ahc_find_tmode_devs(struct ahc_softc *ahc,
				    struct cam_sim *sim, union ccb *ccb,
				    struct ahc_tmode_tstate **tstate,
				    struct ahc_tmode_lstate **lstate,
				    int notfound_failure);
#ifndef AHC_TMODE_ENABLE
#define AHC_TMODE_ENABLE 0
#endif
#endif
/******************************* Debug ***************************************/
void			ahc_print_scb(struct scb *scb);
void			ahc_dump_card_state(struct ahc_softc *ahc);
#endif /* _AIC7XXX_H_ */