1 files changed, 88 insertions, 0 deletions
diff --git a/include/scsi/scsi_transport.h b/include/scsi/scsi_transport.h
new file mode 100644
index 0000000000..a0458bda31
--- /dev/null
+++ b/include/scsi/scsi_transport.h
@@ -0,0 +1,88 @@
+/* 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 */