62a8612972
There's a basic need not to have parameters go under or over certain values when doing domain validation. The basic ones are max_offset, max_width and min_period This patch makes the transport class take and enforce these three limits. Currently they can be set by the user, although they could obviously be read from the HBA's on-board NVRAM area during slave_configure (if it has one). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
142 lines
6.1 KiB
C
142 lines
6.1 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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/config.h>
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#include <linux/transport_class.h>
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struct scsi_transport_template;
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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 dt:1; /* DT clocking enabled */
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unsigned int qas:1; /* Quick Arbitration and Selection enabled */
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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 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 */
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struct semaphore dv_sem; /* 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_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_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_initial_dv(x) (((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv)
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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_signalling)(struct Scsi_Host *);
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void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type);
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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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};
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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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#endif /* SCSI_TRANSPORT_SPI_H */
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