xref: /onnv-gate/usr/src/uts/sun/sys/scsi/adapters/fascmd.h (revision 6640:c92ca9b95b9c)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
#ifndef	_SYS_SCSI_ADAPTERS_FASCMD_H
#define	_SYS_SCSI_ADAPTERS_FASCMD_H

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <sys/note.h>
#include <sys/isa_defs.h>
#include <sys/scsi/scsi_types.h>

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * The transport layer deals with things in terms of the following structure.
 * Note	that the target	driver's view of things	is the scsi_pkt	that is
 * enfolded as the first element of the	following structure.
 *
 * the preferred the cdb size is 12. fas is a scsi2 HBA driver and
 * rarely needs 16 byte cdb's
 */

/*
 * preferred pkt_private length in 64-bit quantities
 */
#ifdef	_LP64
#define	PKT_PRIV_SIZE	2
#define	PKT_PRIV_LEN	16	/* in bytes */
#else /* _ILP32 */
#define	PKT_PRIV_SIZE	1
#define	PKT_PRIV_LEN	8	/* in bytes */
#endif


#define	PKT2CMD(pkt)		((struct fas_cmd *)(pkt)->pkt_ha_private)
#define	CMD2PKT(sp)		((sp)->cmd_pkt)

#define	EXTCMD_SIZE		(sizeof (struct fas_cmd) + scsi_pkt_size())
#define	EXTCMDS_STATUS_SIZE	(sizeof (struct scsi_arq_status))

struct fas_cmd {
	struct scsi_pkt		*cmd_pkt;	/* the generic packet itself */
	struct fas_cmd		*cmd_forw;	/* ready fifo que link */
	uchar_t			*cmd_cdbp;	/* active command pointer */

	uint32_t		cmd_data_count;	/* aggregate data count */
	uint32_t		cmd_cur_addr;	/* current dma address */

	ushort_t		cmd_qfull_retries;

	ushort_t		cmd_nwin;	/* number of windows */
	ushort_t		cmd_cur_win;	/* current window */

	ushort_t		cmd_saved_win;	/* saved window */
	uint32_t		cmd_saved_data_count; /* saved aggr. count */
	uint32_t		cmd_saved_cur_addr; /* saved virt address */
	int			cmd_pkt_flags;	/* copy	of pkt_flags */

	ddi_dma_handle_t	cmd_dmahandle;	/* dma handle */
	ddi_dma_cookie_t	cmd_dmacookie;	/* current dma cookie */
	uint32_t		cmd_dmacount;	/* total xfer count */

	uchar_t			cmd_cdb[CDB_SIZE]; /* 12 byte cdb */
	uint_t			cmd_flags;	/* private flags */
	struct scsi_arq_status	cmd_scb;
	uint_t			cmd_scblen;	/* length of scb */
	uchar_t			cmd_slot;
	uchar_t			cmd_age;	/* cmd age (tagged queing) */
	uint_t			cmd_cdblen;	/* length of cdb */
	uint64_t		cmd_pkt_private[PKT_PRIV_SIZE];
	uint_t			cmd_privlen;	/* length of tgt private */
	uchar_t			cmd_tag[2];	/* command tag */
	uchar_t			cmd_actual_cdblen; /* length of	cdb */
};

_NOTE(SCHEME_PROTECTS_DATA("unique per pkt", fas_cmd))

/*
 * private data	for arq	pkt
 */
struct arq_private_data	{
	struct buf	*arq_save_bp;
	struct fas_cmd	*arq_save_sp;
};

/*
 * A note about	the cmd_cdb && cmd_scb structures:
 *
 *	If the command allocation requested exceeds the	size of	CDB_SIZE,
 *	the cdb	will be	allocated outside this structure (via kmem_zalloc)
 *	The same applies to cmd_scb.
 */

/*
 * These are the defined flags for this	structure.
 */
#define	CFLAG_CMDDISC		0x0001	/* cmd currently disconnected */
#define	CFLAG_WATCH		0x0002	/* watchdog time for this command */
#define	CFLAG_FINISHED		0x0004	/* command completed */
#define	CFLAG_CHKSEG		0x0008	/* check cmd_data within seg */
#define	CFLAG_COMPLETED		0x0010	/* completion routine called */
#define	CFLAG_PREPARED		0x0020	/* pkt has been	init'ed	*/
#define	CFLAG_IN_TRANSPORT	0x0040	/* in use by host adapter driver */
#define	CFLAG_RESTORE_PTRS	0x0080	/* implicit restore ptr on reconnect */
#define	CFLAG_TRANFLAG		0x00ff	/* covers transport part of flags */
#define	CFLAG_CMDPROXY		0x000100 /* cmd	is a 'proxy' command */
#define	CFLAG_CMDARQ		0x000200 /* cmd	is a 'rqsense' command */
#define	CFLAG_DMAVALID		0x000400 /* dma	mapping	valid */
#define	CFLAG_DMASEND		0x000800 /* data	is going 'out' */
#define	CFLAG_CMDIOPB		0x001000 /* this	is an 'iopb' packet */
#define	CFLAG_CDBEXTERN		0x002000 /* cdb	kmem_alloc'd */
#define	CFLAG_SCBEXTERN		0x004000 /* scb	kmem_alloc'd */
#define	CFLAG_FREE		0x008000 /* packet is on	free list */
#define	CFLAG_PRIVEXTERN	0x020000 /* target private kmem_alloc'd	*/
#define	CFLAG_DMA_PARTIAL	0x040000 /* partial xfer OK */

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_SCSI_ADAPTERS_FASCMD_H */