CAM Transport Layer (XPT).

Submitted by:	The CAM Team

1 files changed, 779 insertions, 0 deletions

diff --git a/sys/cam/cam_ccb.h b/sys/cam/cam_ccb.h
new file mode 100644
index 0000000..1e80e37
--- /dev/null
+++ b/sys/cam/cam_ccb.h
@@ -0,0 +1,779 @@
+/*
+ * Data structures and definitions for CAM Control Blocks (CCBs).
+ *
+ * Copyright (c) 1997, 1998 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_CCB_H
+#define _CAM_CAM_CCB_H 1
+
+#include <sys/queue.h>
+#include <sys/cdefs.h>
+#ifndef KERNEL
+#include <sys/callout.h>
+#endif
+#include <cam/cam_debug.h>
+#include <cam/scsi/scsi_all.h>
+
+
+/* General allocation length definitions for CCB structures */
+#define	IOCDBLEN	CAM_MAX_CDBLEN	/* Space for CDB bytes/pointer */
+#define	VUHBALEN	14		/* Vendor Unique HBA length */
+#define	SIM_IDLEN	16		/* ASCII string len for SIM ID */
+#define	HBA_IDLEN	16		/* ASCII string len for HBA ID */
+#define	DEV_IDLEN	16		/* ASCII string len for device names */
+#define CCB_PERIPH_PRIV_SIZE 	2	/* size of peripheral private area */
+#define CCB_SIM_PRIV_SIZE 	2	/* size of sim private area */
+
+/* Struct definitions for CAM control blocks */
+
+/* Common CCB header */
+/* CAM CCB flags */
+typedef enum {
+	CAM_CDB_POINTER		= 0x00000001,/* The CDB field is a pointer    */
+	CAM_QUEUE_ENABLE	= 0x00000002,/* SIM queue actions are enabled */
+	CAM_CDB_LINKED		= 0x00000004,/* CCB contains a linked CDB     */
+	CAM_SCATTER_VALID	= 0x00000010,/* Scatter/gather list is valid  */
+	CAM_DIS_AUTOSENSE	= 0x00000020,/* Disable autosense feature     */
+	CAM_DIR_RESV		= 0x00000000,/* Data direction (00:reserved)  */
+	CAM_DIR_IN		= 0x00000040,/* Data direction (01:DATA IN)   */
+	CAM_DIR_OUT		= 0x00000080,/* Data direction (10:DATA OUT)  */
+	CAM_DIR_NONE		= 0x000000C0,/* Data direction (11:no data)   */
+	CAM_DIR_MASK		= 0x000000C0,/* Data direction Mask	      */
+	CAM_SOFT_RST_OP		= 0x00000100,/* Use Soft reset alternative    */
+	CAM_ENG_SYNC		= 0x00000200,/* Flush resid bytes on complete */
+	CAM_DEV_QFRZDIS		= 0x00000400,/* Disable DEV Q freezing	      */
+	CAM_DEV_QFREEZE		= 0x00000800,/* Freeze DEV Q on execution     */
+	CAM_HIGH_POWER		= 0x00001000,/* Command takes a lot of power  */
+	CAM_SENSE_PTR		= 0x00002000,/* Sense data is a pointer	      */
+	CAM_SENSE_PHYS		= 0x00004000,/* Sense pointer is physical addr*/
+	CAM_TAG_ACTION_VALID	= 0x00008000,/* Use the tag action in this ccb*/
+	CAM_PASS_ERR_RECOVER	= 0x00010000,/* Pass driver does err. recovery*/
+	CAM_DIS_DISCONNECT	= 0x00020000,/* Disable disconnect	      */
+	CAM_SG_LIST_PHYS	= 0x00040000,/* SG list has physical addrs.   */
+	CAM_MSG_BUF_PHYS	= 0x00080000,/* Message buffer ptr is physical*/
+	CAM_SNS_BUF_PHYS	= 0x00100000,/* Autosense data ptr is physical*/
+	CAM_DATA_PHYS		= 0x00200000,/* SG/Buffer data ptrs are phys. */
+	CAM_CDB_PHYS		= 0x00400000,/* CDB poiner is physical	      */
+	CAM_ENG_SGLIST		= 0x00800000,/* SG list is for the HBA engine */
+
+/* Phase cognizant mode flags */
+	CAM_DIS_AUTOSRP		= 0x01000000,/* Diable autosave/restore ptrs  */
+	CAM_DIS_AUTODISC	= 0x02000000,/* Disable auto disconnect	      */
+	CAM_TGT_CCB_AVAIL	= 0x04000000,/* Target CCB available	      */
+	CAM_TGT_PHASE_MODE	= 0x08000000,/* The SIM runs in phase mode    */
+	CAM_MSGB_VALID		= 0x20000000,/* Message buffer valid	      */
+	CAM_STATUS_VALID	= 0x40000000,/* Status buffer valid	      */
+	CAM_DATAB_VALID		= 0x80000000,/* Data buffer valid	      */
+	
+/* Host target Mode flags */
+	CAM_TERM_IO		= 0x20000000,/* Terminate I/O Message sup.    */
+	CAM_DISCONNECT		= 0x40000000,/* Disconnects are mandatory     */
+	CAM_SEND_STATUS		= 0x80000000,/* Send status after data phase  */
+} ccb_flags;
+
+/* XPT Opcodes for xpt_action */
+typedef enum {
+/* Common function commands: 0x00->0x0F */
+	XPT_NOOP,		/* Execute Nothing */
+	XPT_SCSI_IO,		/* Execute the requested I/O operation */
+	XPT_GDEV_TYPE,		/* Get type information for specified device */
+	XPT_GDEVLIST,		/* Get a list of peripheral devices */
+	XPT_PATH_INQ,		/* Path routing inquiry */
+	XPT_REL_SIMQ,		/* Release a frozen SIM queue */
+	XPT_SASYNC_CB,		/* Set Asynchronous Callback Parameters */
+	XPT_SDEV_TYPE,		/* Set device type information */
+	XPT_SCAN_BUS,		/* (Re)Scan the SCSI Bus */
+	XPT_DEV_MATCH,		/* Get EDT entries matching the given pattern */
+	XPT_DEBUG,		/* Turn on debugging for a bus, target or lun */
+/* SCSI Control Functions: 0x10->0x1F */
+	XPT_ABORT = 0x10,	/* Abort the specified CCB */
+	XPT_RESET_BUS,		/* Reset the specified SCSI bus */
+	XPT_RESET_DEV,		/* Bus Device Reset the specified SCSI device */
+	XPT_TERM_IO,		/* Terminate the I/O process */
+	XPT_SCAN_LUN,		/* Scan Logical Unit */
+	XPT_GET_TRAN_SETTINGS,	/*
+				 * Get default/user transfer settings
+				 * for the target
+				 */
+	XPT_SET_TRAN_SETTINGS,	/*
+				 * Set transfer rate/width
+				 * negotiation settings
+				 */
+	XPT_CALC_GEOMETRY,	/*
+				 * Calculate the geometry parameters for
+				 * a device give the sector size and
+				 * volume size.
+				 */
+
+/* HBA engine commands 0x20->0x2F */
+	XPT_ENG_INQ = 0x20,	/* HBA engine feature inquiry */
+	XPT_ENG_EXEC,		/* HBA execute engine request */
+
+/* Target mode commands: 0x30->0x3F */
+	XPT_EN_LUN = 0x30,	/* Enable LUN as a target */
+	XPT_TARGET_IO,		/* Execute target I/O request */
+	XPT_ACCEPT_TARGET_IO,	/* Accept Host Target Mode CDB */
+	XPT_CONT_TARGET_IO,	/* Continue Host Target I/O Connection */
+	XPT_IMMED_NOTIFY,	/* Notify Host Target driver of event */
+	XPT_NOTIFY_ACK,		/* Acknowledgement of event */
+
+/* Vendor Unique codes: 0x80->0x8F */
+	XPT_VUNIQUE = 0x80
+} xpt_opcode;
+
+typedef union {
+	LIST_ENTRY(ccb_hdr) le;
+	SLIST_ENTRY(ccb_hdr) sle;
+	TAILQ_ENTRY(ccb_hdr) tqe;
+	STAILQ_ENTRY(ccb_hdr) stqe;
+} camq_entry;
+
+typedef union {
+	void		*ptr;
+	u_long		field;
+	u_int8_t	bytes[sizeof(void *) > sizeof(u_long)
+			      ? sizeof(void *) : sizeof(u_long)];
+} ccb_priv_entry;
+
+typedef union {
+	ccb_priv_entry	entries[CCB_PERIPH_PRIV_SIZE];
+	u_int8_t	bytes[CCB_PERIPH_PRIV_SIZE * sizeof(ccb_priv_entry)];
+} ccb_ppriv_area;
+
+typedef union {
+	ccb_priv_entry	entries[CCB_SIM_PRIV_SIZE];
+	u_int8_t	bytes[CCB_SIM_PRIV_SIZE * sizeof(ccb_priv_entry)];
+} ccb_spriv_area;
+
+struct ccb_hdr {
+	cam_pinfo	pinfo;	/* Info for priority scheduling */
+	camq_entry	xpt_links;	/* For chaining in the XPT layer */	
+	camq_entry	sim_links;	/* For chaining in the SIM layer */	
+	camq_entry	periph_links;/* For chaining in the type driver */
+	u_int32_t	retry_count;
+	                        /* Callback on completion function */
+	void		(*cbfcnp)(struct cam_periph *, union ccb *);
+	xpt_opcode	func_code;	/* XPT function code */
+	u_int32_t	status;	/* Status returned by CAM subsystem */
+				/* Compiled path for this ccb */
+	struct		cam_path *path;
+	path_id_t	path_id;	/* Path ID for the request */
+	target_id_t	target_id;	/* Target device ID */
+	lun_id_t	target_lun;	/* Target LUN number */
+	u_int32_t	flags;
+	ccb_ppriv_area	periph_priv;
+	ccb_spriv_area	sim_priv;
+	u_int32_t	timeout;	/* Timeout value */
+					/* Callout handle used for timeouts */
+	struct		callout_handle timeout_ch;
+};
+
+/* Get Device Information CCB */
+struct ccb_getdev {
+	struct	  ccb_hdr ccb_h;
+	struct	  scsi_inquiry_data inq_data;
+	u_int8_t  serial_num[252];
+	u_int8_t  serial_num_len;
+	u_int8_t  pd_type;	/* returned peripheral device type */
+	int	  dev_openings;	/* Space left for more work on device*/	
+	int	  dev_active;	/* Transactions running on the device */
+	int	  devq_openings;/* Space left for more queued work */
+	int	  devq_queued;	/* Transactions queued to be sent */
+	int	  held;		/*
+				 * CCBs held by peripheral drivers
+				 * for this device
+				 */
+	u_int8_t  maxtags;	/*
+				 * Boundary conditions for number of
+				 * tagged operations
+				 */
+	u_int8_t  mintags;
+};
+
+
+typedef enum {
+	CAM_GDEVLIST_LAST_DEVICE,
+	CAM_GDEVLIST_LIST_CHANGED,
+	CAM_GDEVLIST_MORE_DEVS,
+	CAM_GDEVLIST_ERROR
+} ccb_getdevlist_status_e;
+
+struct ccb_getdevlist {
+	struct ccb_hdr		ccb_h;
+	char 			periph_name[DEV_IDLEN];
+	u_int32_t		unit_number;
+	unsigned int		generation;
+	u_int32_t		index;
+	ccb_getdevlist_status_e	status;
+};
+
+typedef enum {
+	PERIPH_MATCH_NONE	= 0x000,
+	PERIPH_MATCH_PATH	= 0x001,
+	PERIPH_MATCH_TARGET	= 0x002,
+	PERIPH_MATCH_LUN	= 0x004,
+	PERIPH_MATCH_NAME	= 0x008,
+	PERIPH_MATCH_UNIT	= 0x010,
+	PERIPH_MATCH_ANY	= 0x01f
+} periph_pattern_flags;
+
+struct periph_match_pattern {
+	char			periph_name[DEV_IDLEN];
+	u_int32_t		unit_number;
+	path_id_t		path_id;
+	target_id_t		target_id;
+	lun_id_t		target_lun;
+	periph_pattern_flags	flags;
+};
+
+typedef enum {
+	DEV_MATCH_NONE		= 0x000,
+	DEV_MATCH_PATH		= 0x001,
+	DEV_MATCH_TARGET	= 0x002,
+	DEV_MATCH_LUN		= 0x004,
+	DEV_MATCH_INQUIRY	= 0x008,
+	DEV_MATCH_ANY		= 0x00f
+} dev_pattern_flags;
+
+struct device_match_pattern {
+	path_id_t				path_id;
+	target_id_t				target_id;
+	lun_id_t				target_lun;
+	struct scsi_static_inquiry_pattern	inq_pat;
+	dev_pattern_flags			flags;
+};
+
+typedef enum {
+	BUS_MATCH_NONE		= 0x000,
+	BUS_MATCH_PATH		= 0x001,
+	BUS_MATCH_NAME		= 0x002,
+	BUS_MATCH_UNIT		= 0x004,
+	BUS_MATCH_BUS_ID	= 0x008,
+	BUS_MATCH_ANY		= 0x00f
+} bus_pattern_flags;
+
+struct bus_match_pattern {
+	path_id_t		path_id;
+	char			dev_name[DEV_IDLEN];
+	u_int32_t		unit_number;
+	u_int32_t		bus_id;
+	bus_pattern_flags	flags;
+};
+
+union match_pattern {
+	struct periph_match_pattern	periph_pattern;
+	struct device_match_pattern	device_pattern;
+	struct bus_match_pattern	bus_pattern;
+};
+
+typedef enum {
+	DEV_MATCH_PERIPH,
+	DEV_MATCH_DEVICE,
+	DEV_MATCH_BUS
+} dev_match_type;
+
+struct dev_match_pattern {
+	dev_match_type		type;
+	union match_pattern	pattern;
+};
+
+struct periph_match_result {
+	char			periph_name[DEV_IDLEN];
+	u_int32_t		unit_number;
+	path_id_t		path_id;
+	target_id_t		target_id;
+	lun_id_t		target_lun;
+};
+
+struct device_match_result {
+	path_id_t			path_id;
+	target_id_t			target_id;
+	lun_id_t			target_lun;
+	struct scsi_inquiry_data	inq_data;
+};
+
+struct bus_match_result {
+	path_id_t	path_id;
+	char		dev_name[DEV_IDLEN];
+	u_int32_t	unit_number;
+	u_int32_t	bus_id;
+};
+
+union match_result {
+	struct periph_match_result	periph_result;
+	struct device_match_result	device_result;
+	struct bus_match_result		bus_result;
+};
+
+struct dev_match_result {
+	dev_match_type		type;
+	union match_result	result;
+};
+
+typedef enum {
+	CAM_DEV_MATCH_LAST,
+	CAM_DEV_MATCH_MORE,
+	CAM_DEV_MATCH_LIST_CHANGED,
+	CAM_DEV_MATCH_SIZE_ERROR,
+	CAM_DEV_MATCH_ERROR
+} ccb_dev_match_status;
+
+typedef enum {
+	CAM_DEV_POS_NONE	= 0x000,
+	CAM_DEV_POS_BUS		= 0x001,
+	CAM_DEV_POS_TARGET	= 0x002,
+	CAM_DEV_POS_DEVICE	= 0x004,
+	CAM_DEV_POS_PERIPH	= 0x008,
+	CAM_DEV_POS_PDPTR	= 0x010,
+	CAM_DEV_POS_TYPEMASK	= 0xf00,
+	CAM_DEV_POS_EDT		= 0x100,
+	CAM_DEV_POS_PDRV	= 0x200
+} dev_pos_type;
+
+struct ccb_dm_cookie {
+	void 	*bus;
+	void	*target;	
+	void	*device;
+	void	*periph;
+	void	*pdrv;
+};
+
+struct ccb_dev_position {
+	u_int			generations[4];
+#define	CAM_BUS_GENERATION	0x00
+#define CAM_TARGET_GENERATION	0x01
+#define CAM_DEV_GENERATION	0x02
+#define CAM_PERIPH_GENERATION	0x03
+	dev_pos_type		position_type;
+	struct ccb_dm_cookie	cookie;
+};
+
+struct ccb_dev_match {
+	struct ccb_hdr			ccb_h;
+	ccb_dev_match_status		status;
+	u_int32_t			num_patterns;
+	u_int32_t			pattern_buf_len;
+	struct dev_match_pattern	*patterns;
+	u_int32_t			num_matches;
+	u_int32_t			match_buf_len;
+	struct dev_match_result		*matches;
+	struct ccb_dev_position		pos;
+};
+
+/*
+ * Definitions for the path inquiry CCB fields.
+ */
+#define CAM_VERSION	0x10	/* Hex value for current version */
+
+typedef enum {
+	PI_MDP_ABLE	= 0x80,	/* Supports MDP message */
+	PI_WIDE_32	= 0x40,	/* Supports 32 bit wide SCSI */
+	PI_WIDE_16	= 0x20, /* Supports 16 bit wide SCSI */
+	PI_SDTR_ABLE	= 0x10,	/* Supports SDTR message */
+	PI_LINKED_CDB	= 0x08, /* Supports linked CDBs */
+	PI_TAG_ABLE	= 0x02,	/* Supports tag queue messages */
+	PI_SOFT_RST	= 0x01,	/* Supports soft reset alternative */
+} pi_inqflag;
+
+typedef enum {
+	PIT_PROCESSOR	= 0x80,	/* Target mode processor mode */
+	PIT_PHASE	= 0x40,	/* Target mode phase cog. mode */
+	PIT_DISCONNECT	= 0x20,	/* Disconnects supported in target mode */
+	PIT_TERM_IO	= 0x10,	/* Terminate I/O message supported in TM */
+	PIT_GRP_6	= 0x08,	/* Group 6 commands supported */
+	PIT_GRP_7	= 0x04,	/* Group 7 commands supported */
+} pi_tmflag;
+
+typedef enum {
+	PIM_SCANHILO	= 0x80,	/* Bus scans from high ID to low ID */
+	PIM_NOREMOVE	= 0x40,	/* Removeable devices not included in scan */
+	PIM_NOINQUIRY	= 0x20,	/* Inquiry data not kept by XPT */
+} pi_miscflag;
+
+/* Path Inquiry CCB */
+struct ccb_pathinq {
+	struct 	    ccb_hdr ccb_h;
+	u_int8_t    version_num;	/* Version number for the SIM/HBA */
+	u_int8_t    hba_inquiry;	/* Mimic of INQ byte 7 for the HBA */
+	u_int8_t    target_sprt;	/* Flags for target mode support */
+	u_int8_t    hba_misc;		/* Misc HBA features */
+	u_int16_t   hba_eng_cnt;	/* HBA engine count */
+					/* Vendor Unique capabilities */
+	u_int8_t    vuhba_flags[VUHBALEN];
+	u_int32_t   max_target;		/* Maximum supported Target */
+	u_int32_t   max_lun;		/* Maximum supported Lun */
+	u_int32_t   async_flags;	/* Installed Async handlers */
+	path_id_t   hpath_id;		/* Highest Path ID in the subsystem */
+	target_id_t initiator_id;	/* ID of the HBA on the SCSI bus */
+	char	    sim_vid[SIM_IDLEN];	/* Vendor ID of the SIM */
+	char	    hba_vid[HBA_IDLEN];	/* Vendor ID of the HBA */
+	char 	    dev_name[DEV_IDLEN];/* Device name for SIM */
+	u_int32_t   unit_number;	/* Unit number for SIM */
+	u_int32_t   bus_id;		/* Bus ID for SIM */
+};
+
+typedef union {
+	u_int8_t *sense_ptr;		/*
+					 * Pointer to storage
+					 * for sense information
+					 */
+	                                /* Storage Area for sense information */
+	struct	 scsi_sense_data sense_buf;
+} sense_t;
+
+typedef union {
+	u_int8_t  *cdb_ptr;		/* Pointer to the CDB bytes to send */
+					/* Area for the CDB send */
+	u_int8_t  cdb_bytes[IOCDBLEN];
+} cdb_t;
+
+/*
+ * SCSI I/O Request CCB used for the XPT_SCSI_IO and XPT_CONT_TARGET_IO
+ * function codes.
+ */
+struct ccb_scsiio {
+	struct	   ccb_hdr ccb_h;
+	union	   ccb *next_ccb;	/* Ptr for next CCB for action */
+	u_int8_t   *req_map;		/* Ptr to mapping info */
+	u_int8_t   *data_ptr;		/* Ptr to the data buf/SG list */
+	u_int32_t  dxfer_len;		/* Data transfer length */
+					/* Autosense storage */	
+	struct     scsi_sense_data sense_data;
+	u_int8_t   sense_len;		/* Number of bytes to autosense */
+	u_int8_t   cdb_len;		/* Number of bytes for the CDB */
+	u_int16_t  sglist_cnt;		/* Number of SG list entries */
+	u_int8_t   scsi_status;		/* Returned SCSI status */
+	u_int8_t   sense_resid;		/* Autosense resid length: 2's comp */
+	u_int32_t  resid;		/* Transfer residual length: 2's comp */
+	cdb_t	   cdb_io;		/* Union for CDB bytes/pointer */
+	u_int8_t   *msg_ptr;		/* Pointer to the message buffer */
+	u_int16_t  msg_len;		/* Number of bytes for the Message */
+	u_int8_t   tag_action;		/* What to do for tag queueing */
+	u_int8_t   tag_id;		/* tag id from initator (target mode) */
+	u_int8_t   init_id;		/* initiator id of who selected */
+};
+
+struct ccb_accept_tio {
+	struct	   ccb_hdr ccb_h;
+	cdb_t	   cdb_io;		/* Union for CDB bytes/pointer */
+	u_int8_t   cdb_len;		/* Number of bytes for the CDB */
+	u_int8_t   tag_action;		/* What to do for tag queueing */
+	u_int8_t   tag_id;		/* tag id from initator (target mode) */
+	u_int8_t   init_id;		/* initiator id of who selected */
+};
+
+/* Release SIM Queue */
+struct ccb_relsim {
+	struct ccb_hdr ccb_h;
+	u_int32_t      release_flags;
+#define RELSIM_ADJUST_OPENINGS		0x01
+#define RELSIM_RELEASE_AFTER_TIMEOUT	0x02
+#define RELSIM_RELEASE_AFTER_CMDCMPLT	0x04
+#define RELSIM_RELEASE_AFTER_QEMPTY	0x08
+	u_int32_t      openings;
+	u_int32_t      release_timeout;
+	u_int32_t      qfrozen_cnt;
+};
+
+/*
+ * Definitions for the asynchronous callback CCB fields.
+ */
+typedef enum {
+	AC_GETDEV_CHANGED	= 0x800,/* Getdev info might have changed */
+	AC_INQ_CHANGED		= 0x400,/* Inquiry info might have changed */
+	AC_TRANSFER_NEG		= 0x200,/* New transfer settings in effect */
+	AC_LOST_DEVICE		= 0x100,/* A device went away */
+	AC_FOUND_DEVICE		= 0x080,/* A new device was found */
+	AC_PATH_DEREGISTERED	= 0x040,/* A path has de-registered */
+	AC_PATH_REGISTERED	= 0x020,/* A new path has been registered */
+	AC_SENT_BDR		= 0x010,/* A BDR message was sent to target */
+	AC_SCSI_AEN		= 0x008,/* A SCSI AEN has been received */
+	AC_UNSOL_RESEL		= 0x002,/* Unsolicited reselection occurred */
+	AC_BUS_RESET		= 0x001	/* A SCSI bus reset occurred */
+} ac_code;
+
+typedef void ac_callback_t (void *softc, u_int32_t code,
+			    struct cam_path *path, void *args);
+
+/* Set Asynchronous Callback CCB */
+struct ccb_setasync {
+	struct ccb_hdr	 ccb_h;
+	u_int32_t	 event_enable;	/* Async Event enables */	
+	ac_callback_t	*callback;
+	void		*callback_arg;
+};
+
+/* Set Device Type CCB */
+struct ccb_setdev {
+	struct	   ccb_hdr ccb_h;
+	u_int8_t   dev_type;	/* Value for dev type field in EDT */
+};
+
+/* SCSI Control Functions */
+
+/* Abort XPT request CCB */
+struct ccb_abort {
+	struct 	ccb_hdr ccb_h;
+	union	ccb *abort_ccb;	/* Pointer to CCB to abort */
+};
+
+/* Reset SCSI Bus CCB */
+struct ccb_resetbus {
+	struct	ccb_hdr ccb_h;
+};
+
+/* Reset SCSI Device CCB */
+struct ccb_resetdev {
+	struct	ccb_hdr ccb_h;
+};
+
+/* Terminate I/O Process Request CCB */
+struct ccb_termio {
+	struct	ccb_hdr ccb_h;
+	union	ccb *termio_ccb;	/* Pointer to CCB to terminate */
+};
+
+/* Get/Set transfer rate/width/disconnection/tag queueing settings */
+struct ccb_trans_settings {
+	struct	ccb_hdr ccb_h;
+	u_int	valid;	/* Which fields to honor */
+#define	CCB_TRANS_SYNC_RATE_VALID	0x01
+#define	CCB_TRANS_SYNC_OFFSET_VALID	0x02
+#define	CCB_TRANS_BUS_WIDTH_VALID	0x04
+#define	CCB_TRANS_DISC_VALID		0x08
+#define	CCB_TRANS_TQ_VALID		0x10
+	u_int	flags;
+#define	CCB_TRANS_CURRENT_SETTINGS	0x01
+#define	CCB_TRANS_USER_SETTINGS		0x02
+#define	CCB_TRANS_DISC_ENB		0x04
+#define	CCB_TRANS_TAG_ENB		0x08
+	u_int	sync_period;
+	u_int	sync_offset;
+	u_int	bus_width;
+};
+
+/*
+ * Calculate the geometry parameters for a device
+ * give the block size and volume size in blocks.
+ */
+struct ccb_calc_geometry {
+	struct	  ccb_hdr ccb_h;
+	u_int32_t block_size;
+	u_int32_t volume_size;
+	u_int16_t cylinders;		
+	u_int8_t  heads;
+	u_int8_t  secs_per_track;
+};
+
+/*
+ * Rescan the given bus, or bus/target/lun
+ */
+struct ccb_rescan {
+	struct	ccb_hdr ccb_h;
+	cam_flags	flags;
+};
+
+/*
+ * Turn on debugging for the given bus, bus/target, or bus/target/lun.
+ */
+struct ccb_debug {
+	struct	ccb_hdr ccb_h;
+	cam_debug_flags flags;
+};
+
+/* Target mode structures. */
+
+struct ccb_en_lun {
+	struct	  ccb_hdr ccb_h;
+	u_int16_t grp6_len;		/* Group 6 VU CDB length */
+	u_int16_t grp7_len;		/* Group 7 VU CDB length */
+	u_int8_t  enable;
+};
+
+struct ccb_immed_notify {
+	struct	  ccb_hdr ccb_h;
+	struct    scsi_sense_data sense_data;
+	u_int8_t  sense_len;		/* Number of bytes in sese buffer */
+	u_int8_t  initiator_id;		/* Id of initiator that selected */
+	u_int16_t seq_id;		/* Sequence Identifier */
+	u_int8_t  message_code;		/* Message Code */
+	u_int8_t  message_args[7];	/* Message Arguments */
+};
+
+struct ccb_notify_ack {
+	struct	  ccb_hdr ccb_h;
+	u_int16_t seq_id;		/* Sequence identifier */
+	u_int8_t  event;		/* Event flags */
+};
+
+/* HBA engine structures. */
+
+typedef enum {
+	EIT_BUFFER,	/* Engine type: buffer memory */
+	EIT_LOSSLESS,	/* Engine type: lossless compression */
+	EIT_LOSSY,	/* Engine type: lossy compression */
+	EIT_ENCRYPT	/* Engine type: encryption */
+} ei_type;
+
+typedef enum {
+	EAD_VUNIQUE,	/* Engine algorithm ID: vendor unique */
+	EAD_LZ1V1,	/* Engine algorithm ID: LZ1 var.1 */
+	EAD_LZ2V1,	/* Engine algorithm ID: LZ2 var.1 */
+	EAD_LZ2V2,	/* Engine algorithm ID: LZ2 var.2 */
+} ei_algo;
+
+struct ccb_eng_inq {
+	struct	  ccb_hdr ccb_h;
+	u_int16_t eng_num;	/* The engine number for this inquiry */
+	ei_type   eng_type;	/* Returned engine type */
+	ei_algo   eng_algo;	/* Returned engine algorithm type */
+	u_int32_t eng_memeory;	/* Returned engine memory size */
+};
+
+struct ccb_eng_exec {	/* This structure must match SCSIIO size */
+	struct	  ccb_hdr ccb_h;
+	u_int8_t  *pdrv_ptr;	/* Ptr used by the peripheral driver */
+	u_int8_t  *req_map;	/* Ptr for mapping info on the req. */
+	u_int8_t  *data_ptr;	/* Pointer to the data buf/SG list */
+	u_int32_t dxfer_len;	/* Data transfer length */
+	u_int8_t  *engdata_ptr;	/* Pointer to the engine buffer data */
+	u_int16_t sglist_cnt;	/* Num of scatter gather list entries */
+	u_int32_t dmax_len;	/* Destination data maximum length */
+	u_int32_t dest_len;	/* Destination data length */
+	int32_t	  src_resid;	/* Source residual length: 2's comp */
+	u_int32_t timeout;	/* Timeout value */
+	u_int16_t eng_num;	/* Engine number for this request */
+	u_int16_t vu_flags;	/* Vendor Unique flags */
+};
+
+/*
+ * Definitions for the timeout field in the SCSI I/O CCB.
+ */
+#define	CAM_TIME_DEFAULT	0x00000000	/* Use SIM default value */
+#define	CAM_TIME_INFINITY	0xFFFFFFFF	/* Infinite timeout */
+
+#define	CAM_SUCCESS	0	/* For signaling general success */
+#define	CAM_FAILURE	1	/* For signaling general failure */
+
+#define CAM_FALSE	0
+#define CAM_TRUE	1
+
+#define XPT_CCB_INVALID	-1	/* for signaling a bad CCB to free */
+
+/*
+ * Union of all CCB types for kernel space allocation.  This union should
+ * never be used for manipulating CCBs - its only use is for the allocation
+ * and deallocation of raw CCB space and is the return type of xpt_ccb_alloc
+ * and the argument to xpt_ccb_free.
+ */
+union ccb {
+	struct	ccb_hdr			ccb_h;	/* For convenience */
+	struct	ccb_scsiio		csio;
+	struct	ccb_getdev		cgd;
+	struct	ccb_getdevlist		cgdl;
+	struct	ccb_pathinq		cpi;
+	struct	ccb_relsim		crs;
+	struct	ccb_setasync		csa;
+	struct	ccb_setdev		csd;
+	struct	ccb_dev_match		cdm;
+	struct	ccb_trans_settings	cts;
+	struct	ccb_calc_geometry	ccg;	
+	struct	ccb_abort		cab;
+	struct	ccb_resetbus		crb;
+	struct	ccb_resetdev		crd;
+	struct	ccb_termio		tio;
+	struct	ccb_accept_tio		atio;
+	struct	ccb_scsiio		ctio;
+	struct	ccb_en_lun		cel;
+	struct	ccb_immed_notify	cin;
+	struct	ccb_notify_ack		cna;
+	struct	ccb_eng_inq		cei;
+	struct	ccb_eng_exec		cee;
+	struct 	ccb_rescan		crcn;
+	struct  ccb_debug		cdbg;
+};
+
+__BEGIN_DECLS
+static __inline void
+cam_fill_csio(struct ccb_scsiio *csio, u_int32_t retries,
+	      void (*cbfcnp)(struct cam_periph *, union ccb *),
+	      u_int32_t flags, u_int8_t tag_action,
+	      u_int8_t *data_ptr, u_int32_t dxfer_len,
+	      u_int8_t sense_len, u_int8_t cdb_len,
+	      u_int32_t timeout);
+
+static __inline void
+cam_fill_ctio(struct ccb_scsiio *csio, u_int32_t retries,
+	      void (*cbfcnp)(struct cam_periph *, union ccb *),
+	      u_int32_t flags, u_int tag_action, u_int tag_id,
+	      u_int init_id, u_int scsi_status, u_int8_t *data_ptr,
+	      u_int32_t dxfer_len, u_int32_t timeout);
+	
+static __inline void
+cam_fill_csio(struct ccb_scsiio *csio, u_int32_t retries,
+	      void (*cbfcnp)(struct cam_periph *, union ccb *),
+	      u_int32_t flags, u_int8_t tag_action,
+	      u_int8_t *data_ptr, u_int32_t dxfer_len,
+	      u_int8_t sense_len, u_int8_t cdb_len,
+	      u_int32_t timeout)
+{
+	csio->ccb_h.func_code = XPT_SCSI_IO;
+	csio->ccb_h.flags = flags;
+	csio->ccb_h.retry_count = retries;	
+	csio->ccb_h.cbfcnp = cbfcnp;
+	csio->ccb_h.timeout = timeout;
+	csio->data_ptr = data_ptr;
+	csio->dxfer_len = dxfer_len;
+	csio->sense_len = sense_len;
+	csio->cdb_len = cdb_len;
+	csio->tag_action = tag_action;
+}
+
+static __inline void
+cam_fill_ctio(struct ccb_scsiio *csio, u_int32_t retries,
+	      void (*cbfcnp)(struct cam_periph *, union ccb *),
+	      u_int32_t flags, u_int tag_action, u_int tag_id,
+	      u_int init_id, u_int scsi_status, u_int8_t *data_ptr,
+	      u_int32_t dxfer_len, u_int32_t timeout)
+{
+	csio->ccb_h.func_code = XPT_CONT_TARGET_IO;
+	csio->ccb_h.flags = flags;
+	csio->ccb_h.retry_count = retries;	
+	csio->ccb_h.cbfcnp = cbfcnp;
+	csio->ccb_h.timeout = timeout;
+	csio->data_ptr = data_ptr;
+	csio->dxfer_len = dxfer_len;
+	csio->scsi_status = scsi_status;
+	csio->tag_action = tag_action;
+	csio->tag_id = tag_id;
+	csio->init_id = init_id;
+}
+
+__END_DECLS
+
+#endif /* _CAM_CAM_CCB_H */