Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *  Transport specific attributes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #ifndef SCSI_TRANSPORT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define SCSI_TRANSPORT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/transport_class.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <scsi/scsi_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <scsi/scsi_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) struct scsi_transport_template {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	/* the attribute containers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	struct transport_container host_attrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	struct transport_container target_attrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	struct transport_container device_attrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	 * If set, called from sysfs and legacy procfs rescanning code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	int (*user_scan)(struct Scsi_Host *, uint, uint, u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	/* The size of the specific transport attribute structure (a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	 * space of this size will be left at the end of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	 * scsi_* structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	int	device_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	int	device_private_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	int	target_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	int	target_private_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	int	host_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	/* no private offset for the host; there's an alternative mechanism */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	 * True if the transport wants to use a host-based work-queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	unsigned int create_work_queue : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	 * Allows a transport to override the default error handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	void (* eh_strategy_handler)(struct Scsi_Host *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define transport_class_to_shost(tc) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	dev_to_shost((tc)->parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* Private area maintenance. The driver requested allocations come
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)  * directly after the transport class allocations (if any).  The idea
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)  * is that you *must* call these only once.  The code assumes that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)  * initial values are the ones the transport specific code requires */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) scsi_transport_reserve_target(struct scsi_transport_template * t, int space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	BUG_ON(t->target_private_offset != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	t->target_private_offset = ALIGN(t->target_size, sizeof(void *));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	t->target_size = t->target_private_offset + space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) scsi_transport_reserve_device(struct scsi_transport_template * t, int space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	BUG_ON(t->device_private_offset != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	t->device_private_offset = ALIGN(t->device_size, sizeof(void *));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	t->device_size = t->device_private_offset + space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static inline void *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) scsi_transport_target_data(struct scsi_target *starget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	return (u8 *)starget->starget_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 		+ shost->transportt->target_private_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static inline void *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) scsi_transport_device_data(struct scsi_device *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	struct Scsi_Host *shost = sdev->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	return (u8 *)sdev->sdev_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 		+ shost->transportt->device_private_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #endif /* SCSI_TRANSPORT_H */