150 lines
6.5 KiB
C
150 lines
6.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Parallel SCSI (SPI) transport specific attributes exported to sysfs.
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*
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* Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
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*/
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#ifndef SCSI_TRANSPORT_SPI_H
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#define SCSI_TRANSPORT_SPI_H
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#include <linux/transport_class.h>
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#include <linux/mutex.h>
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struct scsi_transport_template;
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struct scsi_target;
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struct scsi_device;
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struct Scsi_Host;
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struct spi_transport_attrs {
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int period; /* value in the PPR/SDTR command */
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int min_period;
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int offset;
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int max_offset;
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unsigned int width:1; /* 0 - narrow, 1 - wide */
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unsigned int max_width:1;
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unsigned int iu:1; /* Information Units enabled */
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unsigned int max_iu:1;
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unsigned int dt:1; /* DT clocking enabled */
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unsigned int qas:1; /* Quick Arbitration and Selection enabled */
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unsigned int max_qas:1;
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unsigned int wr_flow:1; /* Write Flow control enabled */
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unsigned int rd_strm:1; /* Read streaming enabled */
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unsigned int rti:1; /* Retain Training Information */
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unsigned int pcomp_en:1;/* Precompensation enabled */
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unsigned int hold_mcs:1;/* Hold Margin Control Settings */
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unsigned int initial_dv:1; /* DV done to this target yet */
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unsigned long flags; /* flags field for drivers to use */
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/* Device Properties fields */
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unsigned int support_sync:1; /* synchronous support */
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unsigned int support_wide:1; /* wide support */
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unsigned int support_dt:1; /* allows DT phases */
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unsigned int support_dt_only; /* disallows ST phases */
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unsigned int support_ius; /* support Information Units */
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unsigned int support_qas; /* supports quick arbitration and selection */
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/* Private Fields */
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unsigned int dv_pending:1; /* Internal flag: DV Requested */
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unsigned int dv_in_progress:1; /* Internal: DV started */
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struct mutex dv_mutex; /* semaphore to serialise dv */
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};
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enum spi_signal_type {
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SPI_SIGNAL_UNKNOWN = 1,
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SPI_SIGNAL_SE,
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SPI_SIGNAL_LVD,
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SPI_SIGNAL_HVD,
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};
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struct spi_host_attrs {
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enum spi_signal_type signalling;
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};
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/* accessor functions */
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#define spi_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->period)
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#define spi_min_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->min_period)
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#define spi_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->offset)
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#define spi_max_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_offset)
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#define spi_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->width)
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#define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width)
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#define spi_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->iu)
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#define spi_max_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_iu)
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#define spi_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dt)
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#define spi_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->qas)
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#define spi_max_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_qas)
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#define spi_wr_flow(x) (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow)
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#define spi_rd_strm(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
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#define spi_rti(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rti)
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#define spi_pcomp_en(x) (((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en)
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#define spi_hold_mcs(x) (((struct spi_transport_attrs *)&(x)->starget_data)->hold_mcs)
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#define spi_initial_dv(x) (((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv)
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#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)
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#define spi_support_sync(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_sync)
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#define spi_support_wide(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_wide)
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#define spi_support_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt)
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#define spi_support_dt_only(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only)
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#define spi_support_ius(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_ius)
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#define spi_support_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_qas)
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#define spi_flags(x) (((struct spi_transport_attrs *)&(x)->starget_data)->flags)
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#define spi_signalling(h) (((struct spi_host_attrs *)(h)->shost_data)->signalling)
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/* The functions by which the transport class and the driver communicate */
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struct spi_function_template {
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void (*get_period)(struct scsi_target *);
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void (*set_period)(struct scsi_target *, int);
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void (*get_offset)(struct scsi_target *);
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void (*set_offset)(struct scsi_target *, int);
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void (*get_width)(struct scsi_target *);
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void (*set_width)(struct scsi_target *, int);
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void (*get_iu)(struct scsi_target *);
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void (*set_iu)(struct scsi_target *, int);
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void (*get_dt)(struct scsi_target *);
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void (*set_dt)(struct scsi_target *, int);
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void (*get_qas)(struct scsi_target *);
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void (*set_qas)(struct scsi_target *, int);
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void (*get_wr_flow)(struct scsi_target *);
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void (*set_wr_flow)(struct scsi_target *, int);
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void (*get_rd_strm)(struct scsi_target *);
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void (*set_rd_strm)(struct scsi_target *, int);
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void (*get_rti)(struct scsi_target *);
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void (*set_rti)(struct scsi_target *, int);
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void (*get_pcomp_en)(struct scsi_target *);
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void (*set_pcomp_en)(struct scsi_target *, int);
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void (*get_hold_mcs)(struct scsi_target *);
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void (*set_hold_mcs)(struct scsi_target *, int);
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void (*get_signalling)(struct Scsi_Host *);
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void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type);
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int (*deny_binding)(struct scsi_target *);
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/* The driver sets these to tell the transport class it
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* wants the attributes displayed in sysfs. If the show_ flag
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* is not set, the attribute will be private to the transport
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* class */
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unsigned long show_period:1;
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unsigned long show_offset:1;
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unsigned long show_width:1;
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unsigned long show_iu:1;
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unsigned long show_dt:1;
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unsigned long show_qas:1;
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unsigned long show_wr_flow:1;
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unsigned long show_rd_strm:1;
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unsigned long show_rti:1;
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unsigned long show_pcomp_en:1;
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unsigned long show_hold_mcs:1;
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};
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struct scsi_transport_template *spi_attach_transport(struct spi_function_template *);
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void spi_release_transport(struct scsi_transport_template *);
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void spi_schedule_dv_device(struct scsi_device *);
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void spi_dv_device(struct scsi_device *);
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void spi_display_xfer_agreement(struct scsi_target *);
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int spi_print_msg(const unsigned char *);
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int spi_populate_width_msg(unsigned char *msg, int width);
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int spi_populate_sync_msg(unsigned char *msg, int period, int offset);
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int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, int width,
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int options);
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int spi_populate_tag_msg(unsigned char *msg, struct scsi_cmnd *cmd);
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#endif /* SCSI_TRANSPORT_SPI_H */
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