forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.6 KiB
88 lines
2.6 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* |
|
* 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 */
|
|
|