150 lines
6.5 KiB
C
150 lines
6.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Parallel SCSI (SPI) transport specific attributes exported to sysfs.
|
|
*
|
|
* Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
|
|
*/
|
|
#ifndef SCSI_TRANSPORT_SPI_H
|
|
#define SCSI_TRANSPORT_SPI_H
|
|
|
|
#include <linux/transport_class.h>
|
|
#include <linux/mutex.h>
|
|
|
|
struct scsi_transport_template;
|
|
struct scsi_target;
|
|
struct scsi_device;
|
|
struct Scsi_Host;
|
|
|
|
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 *);
|
|
void (*set_wr_flow)(struct scsi_target *, int);
|
|
void (*get_rd_strm)(struct scsi_target *);
|
|
void (*set_rd_strm)(struct scsi_target *, int);
|
|
void (*get_rti)(struct scsi_target *);
|
|
void (*set_rti)(struct scsi_target *, int);
|
|
void (*get_pcomp_en)(struct scsi_target *);
|
|
void (*set_pcomp_en)(struct scsi_target *, int);
|
|
void (*get_hold_mcs)(struct scsi_target *);
|
|
void (*set_hold_mcs)(struct scsi_target *, int);
|
|
void (*get_signalling)(struct Scsi_Host *);
|
|
void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type);
|
|
int (*deny_binding)(struct scsi_target *);
|
|
/* The driver sets these to tell the transport class it
|
|
* wants the attributes displayed in sysfs. If the show_ flag
|
|
* is not set, the attribute will be private to the transport
|
|
* class */
|
|
unsigned long show_period:1;
|
|
unsigned long show_offset:1;
|
|
unsigned long show_width:1;
|
|
unsigned long show_iu:1;
|
|
unsigned long show_dt:1;
|
|
unsigned long show_qas:1;
|
|
unsigned long show_wr_flow:1;
|
|
unsigned long show_rd_strm:1;
|
|
unsigned long show_rti:1;
|
|
unsigned long show_pcomp_en:1;
|
|
unsigned long show_hold_mcs:1;
|
|
};
|
|
|
|
struct scsi_transport_template *spi_attach_transport(struct spi_function_template *);
|
|
void spi_release_transport(struct scsi_transport_template *);
|
|
void spi_schedule_dv_device(struct scsi_device *);
|
|
void spi_dv_device(struct scsi_device *);
|
|
void spi_display_xfer_agreement(struct scsi_target *);
|
|
int spi_print_msg(const unsigned char *);
|
|
int spi_populate_width_msg(unsigned char *msg, int width);
|
|
int spi_populate_sync_msg(unsigned char *msg, int period, int offset);
|
|
int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, int width,
|
|
int options);
|
|
int spi_populate_tag_msg(unsigned char *msg, struct scsi_cmnd *cmd);
|
|
|
|
#endif /* SCSI_TRANSPORT_SPI_H */
|