mirror of
https://github.com/torvalds/linux
synced 2024-10-03 18:00:50 +00:00
1a59d1b8e0
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Transport specific attributes.
|
|
*
|
|
* Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
|
|
*/
|
|
#ifndef SCSI_TRANSPORT_H
|
|
#define SCSI_TRANSPORT_H
|
|
|
|
#include <linux/transport_class.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/bug.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <scsi/scsi_device.h>
|
|
|
|
struct scsi_transport_template {
|
|
/* the attribute containers */
|
|
struct transport_container host_attrs;
|
|
struct transport_container target_attrs;
|
|
struct transport_container device_attrs;
|
|
|
|
/*
|
|
* If set, called from sysfs and legacy procfs rescanning code.
|
|
*/
|
|
int (*user_scan)(struct Scsi_Host *, uint, uint, u64);
|
|
|
|
/* The size of the specific transport attribute structure (a
|
|
* space of this size will be left at the end of the
|
|
* scsi_* structure */
|
|
int device_size;
|
|
int device_private_offset;
|
|
int target_size;
|
|
int target_private_offset;
|
|
int host_size;
|
|
/* no private offset for the host; there's an alternative mechanism */
|
|
|
|
/*
|
|
* True if the transport wants to use a host-based work-queue
|
|
*/
|
|
unsigned int create_work_queue : 1;
|
|
|
|
/*
|
|
* Allows a transport to override the default error handler.
|
|
*/
|
|
void (* eh_strategy_handler)(struct Scsi_Host *);
|
|
};
|
|
|
|
#define transport_class_to_shost(tc) \
|
|
dev_to_shost((tc)->parent)
|
|
|
|
|
|
/* Private area maintenance. The driver requested allocations come
|
|
* directly after the transport class allocations (if any). The idea
|
|
* is that you *must* call these only once. The code assumes that the
|
|
* initial values are the ones the transport specific code requires */
|
|
static inline void
|
|
scsi_transport_reserve_target(struct scsi_transport_template * t, int space)
|
|
{
|
|
BUG_ON(t->target_private_offset != 0);
|
|
t->target_private_offset = ALIGN(t->target_size, sizeof(void *));
|
|
t->target_size = t->target_private_offset + space;
|
|
}
|
|
static inline void
|
|
scsi_transport_reserve_device(struct scsi_transport_template * t, int space)
|
|
{
|
|
BUG_ON(t->device_private_offset != 0);
|
|
t->device_private_offset = ALIGN(t->device_size, sizeof(void *));
|
|
t->device_size = t->device_private_offset + space;
|
|
}
|
|
static inline void *
|
|
scsi_transport_target_data(struct scsi_target *starget)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(&starget->dev);
|
|
return (u8 *)starget->starget_data
|
|
+ shost->transportt->target_private_offset;
|
|
|
|
}
|
|
static inline void *
|
|
scsi_transport_device_data(struct scsi_device *sdev)
|
|
{
|
|
struct Scsi_Host *shost = sdev->host;
|
|
return (u8 *)sdev->sdev_data
|
|
+ shost->transportt->device_private_offset;
|
|
}
|
|
|
|
void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q);
|
|
|
|
#endif /* SCSI_TRANSPORT_H */
|