89 строки
2.6 KiB
C
89 строки
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 */
|