CAM Transport Layer (XPT).

Submitted by:	The CAM Team

1 files changed, 75 insertions, 0 deletions

diff --git a/sys/cam/cam_xpt.h b/sys/cam/cam_xpt.h
new file mode 100644
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+++ b/sys/cam/cam_xpt.h
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+ /*
+ * Data structures and definitions for dealing with the 
+ * Common Access Method Transport (xpt) layer.
+ *
+ * Copyright (c) 1997 Justin T. Gibbs.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification, immediately at the beginning of the file.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *      $Id$
+ */
+
+#ifndef _CAM_CAM_XPT_H
+#define _CAM_CAM_XPT_H 1
+
+/* Forward Declarations */
+union ccb;
+struct cam_periph;
+struct cam_sim;
+
+/*
+ * Definition of a CAM path.  Paths are created from bus, target, and lun ids
+ * via xpt_create_path and allow for reference to devices without recurring
+ * lookups in the edt.
+ */
+struct cam_path;
+
+/* Path functions */
+
+#ifdef KERNEL
+
+void			xpt_action(union ccb *new_ccb);
+void			xpt_setup_ccb(struct ccb_hdr *ccb_h,
+				      struct cam_path *path,
+				      u_int32_t priority);
+void			xpt_merge_ccb(union ccb *master_ccb,
+				      union ccb *slave_ccb);
+cam_status		xpt_create_path(struct cam_path **new_path_ptr,
+					struct cam_periph *perph,
+					path_id_t path_id,
+					target_id_t target_id, lun_id_t lun_id);
+void			xpt_free_path(struct cam_path *path);
+int			xpt_path_comp(struct cam_path *path1,
+				      struct cam_path *path2);
+void			xpt_print_path(struct cam_path *path);
+path_id_t		xpt_path_path_id(struct cam_path *path);
+target_id_t		xpt_path_target_id(struct cam_path *path);
+lun_id_t		xpt_path_lun_id(struct cam_path *path);
+struct cam_sim		*xpt_path_sim(struct cam_path *path);
+struct cam_periph	*xpt_path_periph(struct cam_path *path);
+void			xpt_async(u_int32_t async_code, struct cam_path *path,
+				  void *async_arg);
+#endif /* KERNEL */
+
+#endif /* _CAM_CAM_XPT_H */
+