cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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scsi_transport.h (2615B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/* 
      3 *  Transport specific attributes.
      4 *
      5 *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
      6 */
      7#ifndef SCSI_TRANSPORT_H
      8#define SCSI_TRANSPORT_H
      9
     10#include <linux/transport_class.h>
     11#include <linux/blkdev.h>
     12#include <linux/bug.h>
     13#include <scsi/scsi_host.h>
     14#include <scsi/scsi_device.h>
     15
     16struct scsi_transport_template {
     17	/* the attribute containers */
     18	struct transport_container host_attrs;
     19	struct transport_container target_attrs;
     20	struct transport_container device_attrs;
     21
     22	/*
     23	 * If set, called from sysfs and legacy procfs rescanning code.
     24	 */
     25	int (*user_scan)(struct Scsi_Host *, uint, uint, u64);
     26
     27	/* The size of the specific transport attribute structure (a
     28	 * space of this size will be left at the end of the
     29	 * scsi_* structure */
     30	int	device_size;
     31	int	device_private_offset;
     32	int	target_size;
     33	int	target_private_offset;
     34	int	host_size;
     35	/* no private offset for the host; there's an alternative mechanism */
     36
     37	/*
     38	 * True if the transport wants to use a host-based work-queue
     39	 */
     40	unsigned int create_work_queue : 1;
     41
     42	/*
     43	 * Allows a transport to override the default error handler.
     44	 */
     45	void (* eh_strategy_handler)(struct Scsi_Host *);
     46};
     47
     48#define transport_class_to_shost(tc) \
     49	dev_to_shost((tc)->parent)
     50
     51
     52/* Private area maintenance. The driver requested allocations come
     53 * directly after the transport class allocations (if any).  The idea
     54 * is that you *must* call these only once.  The code assumes that the
     55 * initial values are the ones the transport specific code requires */
     56static inline void
     57scsi_transport_reserve_target(struct scsi_transport_template * t, int space)
     58{
     59	BUG_ON(t->target_private_offset != 0);
     60	t->target_private_offset = ALIGN(t->target_size, sizeof(void *));
     61	t->target_size = t->target_private_offset + space;
     62}
     63static inline void
     64scsi_transport_reserve_device(struct scsi_transport_template * t, int space)
     65{
     66	BUG_ON(t->device_private_offset != 0);
     67	t->device_private_offset = ALIGN(t->device_size, sizeof(void *));
     68	t->device_size = t->device_private_offset + space;
     69}
     70static inline void *
     71scsi_transport_target_data(struct scsi_target *starget)
     72{
     73	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
     74	return (u8 *)starget->starget_data
     75		+ shost->transportt->target_private_offset;
     76
     77}
     78static inline void *
     79scsi_transport_device_data(struct scsi_device *sdev)
     80{
     81	struct Scsi_Host *shost = sdev->host;
     82	return (u8 *)sdev->sdev_data
     83		+ shost->transportt->device_private_offset;
     84}
     85
     86void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q);
     87
     88#endif /* SCSI_TRANSPORT_H */