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149 lines
6.5 KiB
149 lines
6.5 KiB
/* 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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