include/scsi/scsi_transport_spi.h

Source file repositories/reference/linux-study-clean/include/scsi/scsi_transport_spi.h

File Facts

System
Linux kernel
Corpus path
include/scsi/scsi_transport_spi.h
Extension
.h
Size
6690 bytes
Lines
150
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct spi_transport_attrs {
	int period;		/* value in the PPR/SDTR command */
	int min_period;
	int offset;
	int max_offset;
	unsigned int width:1;	/* 0 - narrow, 1 - wide */
	unsigned int max_width:1;
	unsigned int iu:1;	/* Information Units enabled */
	unsigned int max_iu:1;
	unsigned int dt:1;	/* DT clocking enabled */
	unsigned int qas:1;	/* Quick Arbitration and Selection enabled */
	unsigned int max_qas:1;
	unsigned int wr_flow:1;	/* Write Flow control enabled */
	unsigned int rd_strm:1;	/* Read streaming enabled */
	unsigned int rti:1;	/* Retain Training Information */
	unsigned int pcomp_en:1;/* Precompensation enabled */
	unsigned int hold_mcs:1;/* Hold Margin Control Settings */
	unsigned int initial_dv:1; /* DV done to this target yet  */
	unsigned long flags;	/* flags field for drivers to use */
	/* Device Properties fields */
	unsigned int support_sync:1; /* synchronous support */
	unsigned int support_wide:1; /* wide support */
	unsigned int support_dt:1; /* allows DT phases */
	unsigned int support_dt_only; /* disallows ST phases */
	unsigned int support_ius; /* support Information Units */
	unsigned int support_qas; /* supports quick arbitration and selection */
	/* Private Fields */
	unsigned int dv_pending:1; /* Internal flag: DV Requested */
	unsigned int dv_in_progress:1;	/* Internal: DV started */
	struct mutex dv_mutex; /* semaphore to serialise dv */
};

enum spi_signal_type {
	SPI_SIGNAL_UNKNOWN = 1,
	SPI_SIGNAL_SE,
	SPI_SIGNAL_LVD,
	SPI_SIGNAL_HVD,
};

struct spi_host_attrs {
	enum spi_signal_type signalling;
};

/* accessor functions */
#define spi_period(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->period)
#define spi_min_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->min_period)
#define spi_offset(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->offset)
#define spi_max_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_offset)
#define spi_width(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->width)
#define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width)
#define spi_iu(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->iu)
#define spi_max_iu(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->max_iu)
#define spi_dt(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->dt)
#define spi_qas(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->qas)
#define spi_max_qas(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->max_qas)
#define spi_wr_flow(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow)
#define spi_rd_strm(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
#define spi_rti(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->rti)
#define spi_pcomp_en(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en)
#define spi_hold_mcs(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->hold_mcs)
#define spi_initial_dv(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv)
#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)

#define spi_support_sync(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_sync)
#define spi_support_wide(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_wide)
#define spi_support_dt(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_dt)
#define spi_support_dt_only(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only)
#define spi_support_ius(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_ius)
#define spi_support_qas(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_qas)

#define spi_flags(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->flags)
#define spi_signalling(h)	(((struct spi_host_attrs *)(h)->shost_data)->signalling)



/* The functions by which the transport class and the driver communicate */
struct spi_function_template {
	void	(*get_period)(struct scsi_target *);
	void	(*set_period)(struct scsi_target *, int);
	void	(*get_offset)(struct scsi_target *);
	void	(*set_offset)(struct scsi_target *, int);
	void	(*get_width)(struct scsi_target *);
	void	(*set_width)(struct scsi_target *, int);
	void	(*get_iu)(struct scsi_target *);
	void	(*set_iu)(struct scsi_target *, int);
	void	(*get_dt)(struct scsi_target *);
	void	(*set_dt)(struct scsi_target *, int);
	void	(*get_qas)(struct scsi_target *);
	void	(*set_qas)(struct scsi_target *, int);
	void	(*get_wr_flow)(struct scsi_target *);

Annotation

Implementation Notes