xref: /src/sys/dev/pci/mfii.c

/* $NetBSD: mfii.c,v 1.4.4.3 2022/09/29 18:26:42 martin Exp $ */
/* $OpenBSD: mfii.c,v 1.58 2018/08/14 05:22:21 jmatthew Exp $ */

/*
 * Copyright (c) 2018 Manuel Bouyer <Manuel.Bouyer (at) lip6.fr>
 * Copyright (c) 2012 David Gwynne <dlg (at) openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mfii.c,v 1.4.4.3 2022/09/29 18:26:42 martin Exp $");

#include "bio.h"

#include <sys/atomic.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/cpu.h>
#include <sys/conf.h>
#include <sys/kauth.h>
#include <sys/workqueue.h>
#include <sys/malloc.h>

#include <uvm/uvm_param.h>

#include <dev/pci/pcidevs.h>
#include <dev/pci/pcivar.h>

#include <sys/bus.h>

#include <dev/sysmon/sysmonvar.h>
#include <sys/envsys.h>

#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsi_spc.h>
#include <dev/scsipi/scsipi_disk.h>
#include <dev/scsipi/scsi_disk.h>
#include <dev/scsipi/scsiconf.h>

#if NBIO > 0
#include <dev/biovar.h>
#endif /* NBIO > 0 */

#include <dev/ic/mfireg.h>
#include <dev/pci/mpiireg.h>

#define	MFII_BAR		0x14
#define MFII_BAR_35		0x10
#define	MFII_PCI_MEMSIZE	0x2000 /* 8k */

#define MFII_OSTS_INTR_VALID	0x00000009
#define MFII_RPI		0x6c /* reply post host index */
#define MFII_OSP2		0xb4 /* outbound scratch pad 2 */
#define MFII_OSP3		0xb8 /* outbound scratch pad 3 */

#define MFII_REQ_TYPE_SCSI	MPII_REQ_DESCR_SCSI_IO
#define MFII_REQ_TYPE_LDIO	(0x7 << 1)
#define MFII_REQ_TYPE_MFA	(0x1 << 1)
#define MFII_REQ_TYPE_NO_LOCK	(0x2 << 1)
#define MFII_REQ_TYPE_HI_PRI	(0x6 << 1)

#define MFII_REQ_MFA(_a)	htole64((_a) | MFII_REQ_TYPE_MFA)

#define MFII_FUNCTION_PASSTHRU_IO			(0xf0)
#define MFII_FUNCTION_LDIO_REQUEST			(0xf1)

#define MFII_MAX_CHAIN_UNIT	0x00400000
#define MFII_MAX_CHAIN_MASK	0x000003E0
#define MFII_MAX_CHAIN_SHIFT	5

#define MFII_256K_IO		128
#define MFII_1MB_IO		(MFII_256K_IO * 4)

#define MFII_CHAIN_FRAME_MIN	1024

struct mfii_request_descr {
	u_int8_t	flags;
	u_int8_t	msix_index;
	u_int16_t	smid;

	u_int16_t	lmid;
	u_int16_t	dev_handle;
} __packed;

#define MFII_RAID_CTX_IO_TYPE_SYSPD	(0x1 << 4)
#define MFII_RAID_CTX_TYPE_CUDA		(0x2 << 4)

struct mfii_raid_context {
	u_int8_t	type_nseg;
	u_int8_t	_reserved1;
	u_int16_t	timeout_value;

	u_int16_t	reg_lock_flags;
#define MFII_RAID_CTX_RL_FLAGS_SEQNO_EN	(0x08)
#define MFII_RAID_CTX_RL_FLAGS_CPU0	(0x00)
#define MFII_RAID_CTX_RL_FLAGS_CPU1	(0x10)
#define MFII_RAID_CTX_RL_FLAGS_CUDA	(0x80)

#define MFII_RAID_CTX_ROUTING_FLAGS_SQN	(1 << 4)
#define MFII_RAID_CTX_ROUTING_FLAGS_CPU0 0
	u_int16_t	virtual_disk_target_id;

	u_int64_t	reg_lock_row_lba;

	u_int32_t	reg_lock_length;

	u_int16_t	next_lm_id;
	u_int8_t	ex_status;
	u_int8_t	status;

	u_int8_t	raid_flags;
	u_int8_t	num_sge;
	u_int16_t	config_seq_num;

	u_int8_t	span_arm;
	u_int8_t	_reserved3[3];
} __packed;

struct mfii_sge {
	u_int64_t	sg_addr;
	u_int32_t	sg_len;
	u_int16_t	_reserved;
	u_int8_t	sg_next_chain_offset;
	u_int8_t	sg_flags;
} __packed;

#define MFII_SGE_ADDR_MASK		(0x03)
#define MFII_SGE_ADDR_SYSTEM		(0x00)
#define MFII_SGE_ADDR_IOCDDR		(0x01)
#define MFII_SGE_ADDR_IOCPLB		(0x02)
#define MFII_SGE_ADDR_IOCPLBNTA		(0x03)
#define MFII_SGE_END_OF_LIST		(0x40)
#define MFII_SGE_CHAIN_ELEMENT		(0x80)

#define MFII_REQUEST_SIZE	256

#define MR_DCMD_LD_MAP_GET_INFO			0x0300e101

#define MFII_MAX_ROW		32
#define MFII_MAX_ARRAY		128

struct mfii_array_map {
	uint16_t		mam_pd[MFII_MAX_ROW];
} __packed;

struct mfii_dev_handle {
	uint16_t		mdh_cur_handle;
	uint8_t			mdh_valid;
	uint8_t			mdh_reserved;
	uint16_t		mdh_handle[2];
} __packed;

struct mfii_ld_map {
	uint32_t		mlm_total_size;
	uint32_t		mlm_reserved1[5];
	uint32_t		mlm_num_lds;
	uint32_t		mlm_reserved2;
	uint8_t			mlm_tgtid_to_ld[2 * MFI_MAX_LD];
	uint8_t			mlm_pd_timeout;
	uint8_t			mlm_reserved3[7];
	struct mfii_array_map	mlm_am[MFII_MAX_ARRAY];
	struct mfii_dev_handle	mlm_dev_handle[MFI_MAX_PD];
} __packed;

struct mfii_task_mgmt {
	union {
		uint8_t			request[128];
		struct mpii_msg_scsi_task_request
					mpii_request;
	} __packed __aligned(8);

	union {
		uint8_t			reply[128];
		uint32_t		flags;
#define MFII_TASK_MGMT_FLAGS_LD				(1 << 0)
#define MFII_TASK_MGMT_FLAGS_PD				(1 << 1)
		struct mpii_msg_scsi_task_reply
					mpii_reply;
	} __packed __aligned(8);
} __packed __aligned(8);

/* We currently don't know the full details of the following struct */
struct mfii_foreign_scan_cfg {
	char data[24];
} __packed;

struct mfii_foreign_scan_info {
	uint32_t count; /* Number of foreign configs found */
	struct mfii_foreign_scan_cfg cfgs[8];
} __packed;

struct mfii_dmamem {
	bus_dmamap_t		mdm_map;
	bus_dma_segment_t	mdm_seg;
	size_t			mdm_size;
	void *			mdm_kva;
};
#define MFII_DMA_MAP(_mdm)	((_mdm)->mdm_map)
#define MFII_DMA_LEN(_mdm)	((_mdm)->mdm_size)
#define MFII_DMA_DVA(_mdm)	((u_int64_t)(_mdm)->mdm_map->dm_segs[0].ds_addr)
#define MFII_DMA_KVA(_mdm)	((void *)(_mdm)->mdm_kva)

struct mfii_softc;

typedef enum mfii_direction {
	MFII_DATA_NONE = 0,
	MFII_DATA_IN,
	MFII_DATA_OUT
} mfii_direction_t;

struct mfii_ccb {
	struct mfii_softc	*ccb_sc;
	void			*ccb_request;
	u_int64_t		ccb_request_dva;
	bus_addr_t		ccb_request_offset;

	void			*ccb_mfi;
	u_int64_t		ccb_mfi_dva;
	bus_addr_t		ccb_mfi_offset;

	struct mfi_sense	*ccb_sense;
	u_int64_t		ccb_sense_dva;
	bus_addr_t		ccb_sense_offset;

	struct mfii_sge		*ccb_sgl;
	u_int64_t		ccb_sgl_dva;
	bus_addr_t		ccb_sgl_offset;
	u_int			ccb_sgl_len;

	struct mfii_request_descr ccb_req;

	bus_dmamap_t		ccb_dmamap64;
	bus_dmamap_t		ccb_dmamap32;
	bool			ccb_dma64;

	/* data for sgl */
	void			*ccb_data;
	size_t			ccb_len;

	mfii_direction_t	ccb_direction;

	void			*ccb_cookie;
	kmutex_t		ccb_mtx;
	kcondvar_t		ccb_cv;
	void			(*ccb_done)(struct mfii_softc *,
				    struct mfii_ccb *);

	u_int32_t		ccb_flags;
#define MFI_CCB_F_ERR			(1<<0)
	u_int			ccb_smid;
	SIMPLEQ_ENTRY(mfii_ccb)	ccb_link;
};
SIMPLEQ_HEAD(mfii_ccb_list, mfii_ccb);

struct mfii_iop {
	int bar;
	int num_sge_loc;
#define MFII_IOP_NUM_SGE_LOC_ORIG	0
#define MFII_IOP_NUM_SGE_LOC_35		1
	u_int16_t ldio_ctx_reg_lock_flags;
	u_int8_t ldio_req_type;
	u_int8_t ldio_ctx_type_nseg;
	u_int8_t sge_flag_chain;
	u_int8_t sge_flag_eol;
};

struct mfii_softc {
	device_t		sc_dev;
	struct scsipi_channel   sc_chan;
	struct scsipi_adapter   sc_adapt;

	const struct mfii_iop	*sc_iop;

	pci_chipset_tag_t	sc_pc;
	pcitag_t		sc_tag;

	bus_space_tag_t		sc_iot;
	bus_space_handle_t	sc_ioh;
	bus_size_t		sc_ios;
	bus_dma_tag_t		sc_dmat;
	bus_dma_tag_t		sc_dmat64;
	bool			sc_64bit_dma;

	void			*sc_ih;

	kmutex_t		sc_ccb_mtx;
	kmutex_t		sc_post_mtx;

	u_int			sc_max_fw_cmds;
	u_int			sc_max_cmds;
	u_int			sc_max_sgl;

	u_int			sc_reply_postq_depth;
	u_int			sc_reply_postq_index;
	kmutex_t		sc_reply_postq_mtx;
	struct mfii_dmamem	*sc_reply_postq;

	struct mfii_dmamem	*sc_requests;
	struct mfii_dmamem	*sc_mfi;
	struct mfii_dmamem	*sc_sense;
	struct mfii_dmamem	*sc_sgl;

	struct mfii_ccb		*sc_ccb;
	struct mfii_ccb_list	sc_ccb_freeq;

	struct mfii_ccb		*sc_aen_ccb;
	struct workqueue	*sc_aen_wq;
	struct work		sc_aen_work;

	kmutex_t		sc_abort_mtx;
	struct mfii_ccb_list	sc_abort_list;
	struct workqueue	*sc_abort_wq;
	struct work		sc_abort_work;

	/* save some useful information for logical drives that is missing
	 * in sc_ld_list
	 */
	struct {
		bool		ld_present;
		char		ld_dev[16];	/* device name sd? */
	}			sc_ld[MFI_MAX_LD];
	int			sc_target_lds[MFI_MAX_LD];

	/* bio */
	struct mfi_conf		*sc_cfg;
	struct mfi_ctrl_info	sc_info;
	struct mfi_ld_list	sc_ld_list;
	struct mfi_ld_details	*sc_ld_details; /* array to all logical disks */
	int			sc_no_pd; /* used physical disks */
	int			sc_ld_sz; /* sizeof sc_ld_details */

	/* mgmt lock */
	kmutex_t		sc_lock;
	bool			sc_running;

	/* sensors */
	struct sysmon_envsys	*sc_sme;
	envsys_data_t		*sc_sensors;
	bool			sc_bbuok;

	device_t		sc_child;
};

// #define MFII_DEBUG
#ifdef MFII_DEBUG
#define DPRINTF(x...)		do { if (mfii_debug) printf(x); } while(0)
#define DNPRINTF(n,x...)	do { if (mfii_debug & n) printf(x); } while(0)
#define	MFII_D_CMD		0x0001
#define	MFII_D_INTR		0x0002
#define	MFII_D_MISC		0x0004
#define	MFII_D_DMA		0x0008
#define	MFII_D_IOCTL		0x0010
#define	MFII_D_RW		0x0020
#define	MFII_D_MEM		0x0040
#define	MFII_D_CCB		0x0080
uint32_t	mfii_debug = 0
/*		    | MFII_D_CMD */
/*		    | MFII_D_INTR */
		    | MFII_D_MISC
/*		    | MFII_D_DMA */
/*		    | MFII_D_IOCTL */
/*		    | MFII_D_RW */
/*		    | MFII_D_MEM */
/*		    | MFII_D_CCB */
		;
#else
#define DPRINTF(x...)
#define DNPRINTF(n,x...)
#endif

static int	mfii_match(device_t, cfdata_t, void *);
static void	mfii_attach(device_t, device_t, void *);
static int	mfii_detach(device_t, int);
static int	mfii_rescan(device_t, const char *, const int *);
static void	mfii_childdetached(device_t, device_t);
static bool	mfii_suspend(device_t, const pmf_qual_t *);
static bool	mfii_resume(device_t, const pmf_qual_t *);
static bool	mfii_shutdown(device_t, int);


CFATTACH_DECL3_NEW(mfii, sizeof(struct mfii_softc),
    mfii_match, mfii_attach, mfii_detach, NULL, mfii_rescan,
	mfii_childdetached, DVF_DETACH_SHUTDOWN);

static void	mfii_scsipi_request(struct scsipi_channel *,
			scsipi_adapter_req_t, void *);
static void	mfii_scsi_cmd_done(struct mfii_softc *, struct mfii_ccb *);

#define DEVNAME(_sc)		(device_xname((_sc)->sc_dev))

static u_int32_t	mfii_read(struct mfii_softc *, bus_size_t);
static void		mfii_write(struct mfii_softc *, bus_size_t, u_int32_t);

static struct mfii_dmamem *	mfii_dmamem_alloc(struct mfii_softc *, size_t);
static void		mfii_dmamem_free(struct mfii_softc *,
			    struct mfii_dmamem *);

static struct mfii_ccb *	mfii_get_ccb(struct mfii_softc *);
static void		mfii_put_ccb(struct mfii_softc *, struct mfii_ccb *);
static int		mfii_init_ccb(struct mfii_softc *);
static void		mfii_scrub_ccb(struct mfii_ccb *);

static int		mfii_transition_firmware(struct mfii_softc *);
static int		mfii_initialise_firmware(struct mfii_softc *);
static int		mfii_get_info(struct mfii_softc *);

static void		mfii_start(struct mfii_softc *, struct mfii_ccb *);
static void		mfii_done(struct mfii_softc *, struct mfii_ccb *);
static int		mfii_poll(struct mfii_softc *, struct mfii_ccb *);
static void		mfii_poll_done(struct mfii_softc *, struct mfii_ccb *);
static int		mfii_exec(struct mfii_softc *, struct mfii_ccb *);
static void		mfii_exec_done(struct mfii_softc *, struct mfii_ccb *);
static int		mfii_my_intr(struct mfii_softc *);
static int		mfii_intr(void *);
static void		mfii_postq(struct mfii_softc *);

static int		mfii_load_ccb(struct mfii_softc *, struct mfii_ccb *,
			    void *, int);
static int		mfii_load_mfa(struct mfii_softc *, struct mfii_ccb *,
			    void *, int);

static int		mfii_mfa_poll(struct mfii_softc *, struct mfii_ccb *);

static int		mfii_mgmt(struct mfii_softc *, uint32_t,
			    const union mfi_mbox *, void *, size_t,
			    mfii_direction_t, bool);
static int		mfii_do_mgmt(struct mfii_softc *, struct mfii_ccb *,
			    uint32_t, const union mfi_mbox *, void *, size_t,
			    mfii_direction_t, bool);
static void		mfii_empty_done(struct mfii_softc *, struct mfii_ccb *);

static int		mfii_scsi_cmd_io(struct mfii_softc *,
			    struct mfii_ccb *, struct scsipi_xfer *);
static int		mfii_scsi_cmd_cdb(struct mfii_softc *,
			    struct mfii_ccb *, struct scsipi_xfer *);
static void		mfii_scsi_cmd_tmo(void *);

static void		mfii_abort_task(struct work *, void *);
static void		mfii_abort(struct mfii_softc *, struct mfii_ccb *,
			    uint16_t, uint16_t, uint8_t, uint32_t);
static void		mfii_scsi_cmd_abort_done(struct mfii_softc *,
			    struct mfii_ccb *);

static int		mfii_aen_register(struct mfii_softc *);
static void		mfii_aen_start(struct mfii_softc *, struct mfii_ccb *,
			    struct mfii_dmamem *, uint32_t);
static void		mfii_aen_done(struct mfii_softc *, struct mfii_ccb *);
static void		mfii_aen(struct work *, void *);
static void		mfii_aen_unregister(struct mfii_softc *);

static void		mfii_aen_pd_insert(struct mfii_softc *,
			    const struct mfi_evtarg_pd_address *);
static void		mfii_aen_pd_remove(struct mfii_softc *,
			    const struct mfi_evtarg_pd_address *);
static void		mfii_aen_pd_state_change(struct mfii_softc *,
			    const struct mfi_evtarg_pd_state *);
static void		mfii_aen_ld_update(struct mfii_softc *);

#if NBIO > 0
static int	mfii_ioctl(device_t, u_long, void *);
static int	mfii_ioctl_inq(struct mfii_softc *, struct bioc_inq *);
static int	mfii_ioctl_vol(struct mfii_softc *, struct bioc_vol *);
static int	mfii_ioctl_disk(struct mfii_softc *, struct bioc_disk *);
static int	mfii_ioctl_alarm(struct mfii_softc *, struct bioc_alarm *);
static int	mfii_ioctl_blink(struct mfii_softc *sc, struct bioc_blink *);
static int	mfii_ioctl_setstate(struct mfii_softc *,
		    struct bioc_setstate *);
static int	mfii_bio_hs(struct mfii_softc *, int, int, void *);
static int	mfii_bio_getitall(struct mfii_softc *);
#endif /* NBIO > 0 */

#if 0
static const char *mfi_bbu_indicators[] = {
	"pack missing",
	"voltage low",
	"temp high",
	"charge active",
	"discharge active",
	"learn cycle req'd",
	"learn cycle active",
	"learn cycle failed",
	"learn cycle timeout",
	"I2C errors",
	"replace pack",
	"low capacity",
	"periodic learn req'd"
};
#endif

static void	mfii_init_ld_sensor(struct mfii_softc *, envsys_data_t *, int);
static void	mfii_refresh_ld_sensor(struct mfii_softc *, envsys_data_t *);
static void	mfii_attach_sensor(struct mfii_softc *, envsys_data_t *);
static int	mfii_create_sensors(struct mfii_softc *);
static int	mfii_destroy_sensors(struct mfii_softc *);
static void	mfii_refresh_sensor(struct sysmon_envsys *, envsys_data_t *);
static void	mfii_bbu(struct mfii_softc *, envsys_data_t *);

/*
 * mfii boards support asynchronous (and non-polled) completion of
 * dcmds by proxying them through a passthru mpii command that points
 * at a dcmd frame. since the passthru command is submitted like
 * the scsi commands using an SMID in the request descriptor,
 * ccb_request memory * must contain the passthru command because
 * that is what the SMID refers to. this means ccb_request cannot
 * contain the dcmd. rather than allocating separate dma memory to
 * hold the dcmd, we reuse the sense memory buffer for it.
 */

static void	mfii_dcmd_start(struct mfii_softc *, struct mfii_ccb *);

static inline void
mfii_dcmd_scrub(struct mfii_ccb *ccb)
{
	memset(ccb->ccb_sense, 0, sizeof(*ccb->ccb_sense));
}

static inline struct mfi_dcmd_frame *
mfii_dcmd_frame(struct mfii_ccb *ccb)
{
	CTASSERT(sizeof(struct mfi_dcmd_frame) <= sizeof(*ccb->ccb_sense));
	return ((struct mfi_dcmd_frame *)ccb->ccb_sense);
}

static inline void
mfii_dcmd_sync(struct mfii_softc *sc, struct mfii_ccb *ccb, int flags)
{
	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_sense),
	    ccb->ccb_sense_offset, sizeof(*ccb->ccb_sense), flags);
}

#define mfii_fw_state(_sc) mfii_read((_sc), MFI_OSP)

static const struct mfii_iop mfii_iop_thunderbolt = {
	MFII_BAR,
	MFII_IOP_NUM_SGE_LOC_ORIG,
	0,
	MFII_REQ_TYPE_LDIO,
	0,
	MFII_SGE_CHAIN_ELEMENT | MFII_SGE_ADDR_IOCPLBNTA,
	0
};

/*
 * a lot of these values depend on us not implementing fastpath yet.
 */
static const struct mfii_iop mfii_iop_25 = {
	MFII_BAR,
	MFII_IOP_NUM_SGE_LOC_ORIG,
	MFII_RAID_CTX_RL_FLAGS_CPU0, /* | MFII_RAID_CTX_RL_FLAGS_SEQNO_EN */
	MFII_REQ_TYPE_NO_LOCK,
	MFII_RAID_CTX_TYPE_CUDA | 0x1,
	MFII_SGE_CHAIN_ELEMENT,
	MFII_SGE_END_OF_LIST
};

static const struct mfii_iop mfii_iop_35 = {
	MFII_BAR_35,
	MFII_IOP_NUM_SGE_LOC_35,
	MFII_RAID_CTX_ROUTING_FLAGS_CPU0, /* | MFII_RAID_CTX_ROUTING_FLAGS_SQN */
	MFII_REQ_TYPE_NO_LOCK,
	MFII_RAID_CTX_TYPE_CUDA | 0x1,
	MFII_SGE_CHAIN_ELEMENT,
	MFII_SGE_END_OF_LIST
};

struct mfii_device {
	pcireg_t		mpd_vendor;
	pcireg_t		mpd_product;
	const struct mfii_iop	*mpd_iop;
};

static const struct mfii_device mfii_devices[] = {
	/* Fusion */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_2208,
	    &mfii_iop_thunderbolt },
	/* Fury */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3008,
	    &mfii_iop_25 },
	/* Invader */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3108,
	    &mfii_iop_25 },
	/* Intruder */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3316,
	    &mfii_iop_25 },
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3324,
	    &mfii_iop_25 },
	/* Cutlass */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_32XX_1,
	    &mfii_iop_25 },
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_32XX_2,
	    &mfii_iop_25 },
	/* Crusader */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3404,
	    &mfii_iop_35 },
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3416,
	    &mfii_iop_35 },
	/* Ventura */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3504,
	    &mfii_iop_35 },
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3516,
	    &mfii_iop_35 },
	/* Tomcat */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3408,
	    &mfii_iop_35 },
	/* Harpoon */
	{ PCI_VENDOR_SYMBIOS,	PCI_PRODUCT_SYMBIOS_MEGARAID_3508,
	    &mfii_iop_35 }
};

static const struct mfii_iop *mfii_find_iop(struct pci_attach_args *);

static const struct mfii_iop *
mfii_find_iop(struct pci_attach_args *pa)
{
	const struct mfii_device *mpd;
	int i;

	for (i = 0; i < __arraycount(mfii_devices); i++) {
		mpd = &mfii_devices[i];

		if (mpd->mpd_vendor == PCI_VENDOR(pa->pa_id) &&
		    mpd->mpd_product == PCI_PRODUCT(pa->pa_id))
			return (mpd->mpd_iop);
	}

	return (NULL);
}

static int
mfii_match(device_t parent, cfdata_t match, void *aux)
{
	return ((mfii_find_iop(aux) != NULL) ? 2 : 0);
}

static void
mfii_attach(device_t parent, device_t self, void *aux)
{
	struct mfii_softc *sc = device_private(self);
	struct pci_attach_args *pa = aux;
	pcireg_t memtype;
	pci_intr_handle_t *ihp;
	char intrbuf[PCI_INTRSTR_LEN];
	const char *intrstr;
	u_int32_t status, scpad2, scpad3;
	int chain_frame_sz, nsge_in_io, nsge_in_chain, i;
	struct scsipi_adapter *adapt = &sc->sc_adapt;
	struct scsipi_channel *chan = &sc->sc_chan;

	/* init sc */
	sc->sc_dev = self;
	sc->sc_iop = mfii_find_iop(aux);
	sc->sc_dmat = pa->pa_dmat;
	if (pci_dma64_available(pa)) {
		sc->sc_dmat64 = pa->pa_dmat64;
		sc->sc_64bit_dma = 1;
	} else {
		sc->sc_dmat64 = pa->pa_dmat;
		sc->sc_64bit_dma = 0;
	}
	SIMPLEQ_INIT(&sc->sc_ccb_freeq);
	mutex_init(&sc->sc_ccb_mtx, MUTEX_DEFAULT, IPL_BIO);
	mutex_init(&sc->sc_post_mtx, MUTEX_DEFAULT, IPL_BIO);
	mutex_init(&sc->sc_reply_postq_mtx, MUTEX_DEFAULT, IPL_BIO);

	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);

	sc->sc_aen_ccb = NULL;
	snprintf(intrbuf, sizeof(intrbuf) - 1, "%saen", device_xname(self));
	workqueue_create(&sc->sc_aen_wq, intrbuf, mfii_aen, sc,
	    PRI_BIO, IPL_BIO, WQ_MPSAFE);

	snprintf(intrbuf, sizeof(intrbuf) - 1, "%sabrt", device_xname(self));
	workqueue_create(&sc->sc_abort_wq, intrbuf, mfii_abort_task,
	    sc, PRI_BIO, IPL_BIO, WQ_MPSAFE);

	mutex_init(&sc->sc_abort_mtx, MUTEX_DEFAULT, IPL_BIO);
	SIMPLEQ_INIT(&sc->sc_abort_list);

	/* wire up the bus shizz */
	memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, sc->sc_iop->bar);
	memtype |= PCI_MAPREG_MEM_TYPE_32BIT;
	if (pci_mapreg_map(pa, sc->sc_iop->bar, memtype, 0,
	    &sc->sc_iot, &sc->sc_ioh, NULL, &sc->sc_ios)) {
		aprint_error(": unable to map registers\n");
		return;
	}

	/* disable interrupts */
	mfii_write(sc, MFI_OMSK, 0xffffffff);

	if (pci_intr_alloc(pa, &ihp, NULL, 0)) {
		aprint_error(": unable to map interrupt\n");
		goto pci_unmap;
	}
	intrstr = pci_intr_string(pa->pa_pc, ihp[0], intrbuf, sizeof(intrbuf));
	pci_intr_setattr(pa->pa_pc, &ihp[0], PCI_INTR_MPSAFE, true);

	/* lets get started */
	if (mfii_transition_firmware(sc))
		goto pci_unmap;
	sc->sc_running = true;

	/* determine max_cmds (refer to the Linux megaraid_sas driver) */
	scpad3 = mfii_read(sc, MFII_OSP3);
	status = mfii_fw_state(sc);
	sc->sc_max_fw_cmds = scpad3 & MFI_STATE_MAXCMD_MASK;
	if (sc->sc_max_fw_cmds == 0)
		sc->sc_max_fw_cmds = status & MFI_STATE_MAXCMD_MASK;
	/*
	 * reduce max_cmds by 1 to ensure that the reply queue depth does not
	 * exceed FW supplied max_fw_cmds.
	 */
	sc->sc_max_cmds = uimin(sc->sc_max_fw_cmds, 1024) - 1;

	/* determine max_sgl (refer to the Linux megaraid_sas driver) */
	scpad2 = mfii_read(sc, MFII_OSP2);
	chain_frame_sz =
		((scpad2 & MFII_MAX_CHAIN_MASK) >> MFII_MAX_CHAIN_SHIFT) *
		((scpad2 & MFII_MAX_CHAIN_UNIT) ? MFII_1MB_IO : MFII_256K_IO);
	if (chain_frame_sz < MFII_CHAIN_FRAME_MIN)
		chain_frame_sz = MFII_CHAIN_FRAME_MIN;

	nsge_in_io = (MFII_REQUEST_SIZE -
		sizeof(struct mpii_msg_scsi_io) -
		sizeof(struct mfii_raid_context)) / sizeof(struct mfii_sge);
	nsge_in_chain = chain_frame_sz / sizeof(struct mfii_sge);

	/* round down to nearest power of two */
	sc->sc_max_sgl = 1;
	while ((sc->sc_max_sgl << 1) <= (nsge_in_io + nsge_in_chain))
		sc->sc_max_sgl <<= 1;

	DNPRINTF(MFII_D_MISC, "%s: OSP 0x%08x, OSP2 0x%08x, OSP3 0x%08x\n",
	    DEVNAME(sc), status, scpad2, scpad3);
	DNPRINTF(MFII_D_MISC, "%s: max_fw_cmds %d, max_cmds %d\n",
	    DEVNAME(sc), sc->sc_max_fw_cmds, sc->sc_max_cmds);
	DNPRINTF(MFII_D_MISC, "%s: nsge_in_io %d, nsge_in_chain %d, "
	    "max_sgl %d\n", DEVNAME(sc), nsge_in_io, nsge_in_chain,
	    sc->sc_max_sgl);

	/* sense memory */
	CTASSERT(sizeof(struct mfi_sense) == MFI_SENSE_SIZE);
	sc->sc_sense = mfii_dmamem_alloc(sc, sc->sc_max_cmds * MFI_SENSE_SIZE);
	if (sc->sc_sense == NULL) {
		aprint_error(": unable to allocate sense memory\n");
		goto pci_unmap;
	}

	/* reply post queue */
	sc->sc_reply_postq_depth = roundup(sc->sc_max_fw_cmds, 16);

	sc->sc_reply_postq = mfii_dmamem_alloc(sc,
	    sc->sc_reply_postq_depth * sizeof(struct mpii_reply_descr));
	if (sc->sc_reply_postq == NULL)
		goto free_sense;

	memset(MFII_DMA_KVA(sc->sc_reply_postq), 0xff,
	    MFII_DMA_LEN(sc->sc_reply_postq));

	/* MPII request frame array */
	sc->sc_requests = mfii_dmamem_alloc(sc,
	    MFII_REQUEST_SIZE * (sc->sc_max_cmds + 1));
	if (sc->sc_requests == NULL)
		goto free_reply_postq;

	/* MFI command frame array */
	sc->sc_mfi = mfii_dmamem_alloc(sc, sc->sc_max_cmds * MFI_FRAME_SIZE);
	if (sc->sc_mfi == NULL)
		goto free_requests;

	/* MPII SGL array */
	sc->sc_sgl = mfii_dmamem_alloc(sc, sc->sc_max_cmds *
	    sizeof(struct mfii_sge) * sc->sc_max_sgl);
	if (sc->sc_sgl == NULL)
		goto free_mfi;

	if (mfii_init_ccb(sc) != 0) {
		aprint_error(": could not init ccb list\n");
		goto free_sgl;
	}

	/* kickstart firmware with all addresses and pointers */
	if (mfii_initialise_firmware(sc) != 0) {
		aprint_error(": could not initialize firmware\n");
		goto free_sgl;
	}

	mutex_enter(&sc->sc_lock);
	if (mfii_get_info(sc) != 0) {
		mutex_exit(&sc->sc_lock);
		aprint_error(": could not retrieve controller information\n");
		goto free_sgl;
	}
	mutex_exit(&sc->sc_lock);

	aprint_normal(": \"%s\", firmware %s",
	    sc->sc_info.mci_product_name, sc->sc_info.mci_package_version);
	if (le16toh(sc->sc_info.mci_memory_size) > 0) {
		aprint_normal(", %uMB cache",
		    le16toh(sc->sc_info.mci_memory_size));
	}
	aprint_normal("\n");
	aprint_naive("\n");

	sc->sc_ih = pci_intr_establish_xname(sc->sc_pc, ihp[0], IPL_BIO,
	    mfii_intr, sc, DEVNAME(sc));
	if (sc->sc_ih == NULL) {
		aprint_error_dev(self, "can't establish interrupt");
		if (intrstr)
			aprint_error(" at %s", intrstr);
		aprint_error("\n");
		goto free_sgl;
	}
	aprint_normal_dev(self, "interrupting at %s\n", intrstr);

	for (i = 0; i < sc->sc_info.mci_lds_present; i++)
		sc->sc_ld[i].ld_present = 1;

	memset(adapt, 0, sizeof(*adapt));
	adapt->adapt_dev = sc->sc_dev;
	adapt->adapt_nchannels = 1;
	/* keep a few commands for management */
	if (sc->sc_max_cmds > 4)
		adapt->adapt_openings = sc->sc_max_cmds - 4;
	else
		adapt->adapt_openings = sc->sc_max_cmds;
	adapt->adapt_max_periph = adapt->adapt_openings;
	adapt->adapt_request = mfii_scsipi_request;
	adapt->adapt_minphys = minphys;
	adapt->adapt_flags = SCSIPI_ADAPT_MPSAFE;

	memset(chan, 0, sizeof(*chan));
	chan->chan_adapter = adapt;
	chan->chan_bustype = &scsi_sas_bustype;
	chan->chan_channel = 0;
	chan->chan_flags = 0;
	chan->chan_nluns = 8;
	chan->chan_ntargets = sc->sc_info.mci_max_lds;
	chan->chan_id = sc->sc_info.mci_max_lds;

	mfii_rescan(sc->sc_dev, "scsi", NULL);

	if (mfii_aen_register(sc) != 0) {
		/* error printed by mfii_aen_register */
		goto intr_disestablish;
	}

	mutex_enter(&sc->sc_lock);
	if (mfii_mgmt(sc, MR_DCMD_LD_GET_LIST, NULL, &sc->sc_ld_list,
	    sizeof(sc->sc_ld_list), MFII_DATA_IN, true) != 0) {
		mutex_exit(&sc->sc_lock);
		aprint_error_dev(self,
		    "getting list of logical disks failed\n");
		goto intr_disestablish;
	}
	mutex_exit(&sc->sc_lock);
	memset(sc->sc_target_lds, -1, sizeof(sc->sc_target_lds));
	for (i = 0; i < sc->sc_ld_list.mll_no_ld; i++) {
		int target = sc->sc_ld_list.mll_list[i].mll_ld.mld_target;
		sc->sc_target_lds[target] = i;
	}

	/* enable interrupts */
	mfii_write(sc, MFI_OSTS, 0xffffffff);
	mfii_write(sc, MFI_OMSK, ~MFII_OSTS_INTR_VALID);

#if NBIO > 0
	if (bio_register(sc->sc_dev, mfii_ioctl) != 0)
		panic("%s: controller registration failed", DEVNAME(sc));
#endif /* NBIO > 0 */

	if (mfii_create_sensors(sc) != 0)
		aprint_error_dev(self, "unable to create sensors\n");

	if (!pmf_device_register1(sc->sc_dev, mfii_suspend, mfii_resume,
	    mfii_shutdown))
		aprint_error_dev(self, "couldn't establish power handler\n");
	return;
intr_disestablish:
	pci_intr_disestablish(sc->sc_pc, sc->sc_ih);
free_sgl:
	mfii_dmamem_free(sc, sc->sc_sgl);
free_mfi:
	mfii_dmamem_free(sc, sc->sc_mfi);
free_requests:
	mfii_dmamem_free(sc, sc->sc_requests);
free_reply_postq:
	mfii_dmamem_free(sc, sc->sc_reply_postq);
free_sense:
	mfii_dmamem_free(sc, sc->sc_sense);
pci_unmap:
	bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
}

#if 0
struct srp_gc mfii_dev_handles_gc =
    SRP_GC_INITIALIZER(mfii_dev_handles_dtor, NULL);

static inline uint16_t
mfii_dev_handle(struct mfii_softc *sc, uint16_t target)
{
	struct srp_ref sr;
	uint16_t *map, handle;

	map = srp_enter(&sr, &sc->sc_pd->pd_dev_handles);
	handle = map[target];
	srp_leave(&sr);

	return (handle);
}

static int
mfii_dev_handles_update(struct mfii_softc *sc)
{
	struct mfii_ld_map *lm;
	uint16_t *dev_handles = NULL;
	int i;
	int rv = 0;

	lm = malloc(sizeof(*lm), M_TEMP, M_WAITOK|M_ZERO);

	rv = mfii_mgmt(sc, MR_DCMD_LD_MAP_GET_INFO, NULL, lm, sizeof(*lm),
	    MFII_DATA_IN, false);

	if (rv != 0) {
		rv = EIO;
		goto free_lm;
	}

	dev_handles = mallocarray(MFI_MAX_PD, sizeof(*dev_handles),
	    M_DEVBUF, M_WAITOK);

	for (i = 0; i < MFI_MAX_PD; i++)
		dev_handles[i] = lm->mlm_dev_handle[i].mdh_cur_handle;

	/* commit the updated info */
	sc->sc_pd->pd_timeout = lm->mlm_pd_timeout;
	srp_update_locked(&mfii_dev_handles_gc,
	    &sc->sc_pd->pd_dev_handles, dev_handles);

free_lm:
	free(lm, M_TEMP, sizeof(*lm));

	return (rv);
}

static void
mfii_dev_handles_dtor(void *null, void *v)
{
	uint16_t *dev_handles = v;

	free(dev_handles, M_DEVBUF, sizeof(*dev_handles) * MFI_MAX_PD);
}
#endif /* 0 */

static int
mfii_detach(device_t self, int flags)
{
	struct mfii_softc *sc = device_private(self);
	int error;

	if (sc->sc_ih == NULL)
		return (0);

	if ((error = config_detach_children(sc->sc_dev, flags)) != 0)
		return error;

	mfii_destroy_sensors(sc);
#if NBIO > 0
	bio_unregister(sc->sc_dev);
#endif
	mfii_shutdown(sc->sc_dev, 0);
	mfii_write(sc, MFI_OMSK, 0xffffffff);

	mfii_aen_unregister(sc);
	pci_intr_disestablish(sc->sc_pc, sc->sc_ih);
	mfii_dmamem_free(sc, sc->sc_sgl);
	mfii_dmamem_free(sc, sc->sc_mfi);
	mfii_dmamem_free(sc, sc->sc_requests);
	mfii_dmamem_free(sc, sc->sc_reply_postq);
	mfii_dmamem_free(sc, sc->sc_sense);
	bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);

	return (0);
}

static int
mfii_rescan(device_t self, const char *ifattr, const int *locators)
{
	struct mfii_softc *sc = device_private(self);
	if (sc->sc_child != NULL)
		return 0;

	sc->sc_child = config_found_sm_loc(self, ifattr, locators,
	    &sc->sc_chan, scsiprint, NULL);
	return 0;
}

static void
mfii_childdetached(device_t self, device_t child)
{
	struct mfii_softc *sc = device_private(self);

	KASSERT(self == sc->sc_dev);
	KASSERT(child == sc->sc_child);

	if (child == sc->sc_child)
		sc->sc_child = NULL;
}

static bool
mfii_suspend(device_t dev, const pmf_qual_t *q)
{
	/* XXX to be implemented */
	return false;
}

static bool
mfii_resume(device_t dev, const pmf_qual_t *q)
{
	/* XXX to be implemented */
	return false;
}

static bool
mfii_shutdown(device_t dev, int how)
{
	struct mfii_softc	*sc = device_private(dev);
	struct mfii_ccb *ccb;
	union mfi_mbox		mbox;
	bool rv = true;

	memset(&mbox, 0, sizeof(mbox));

	mutex_enter(&sc->sc_lock);
	DNPRINTF(MFII_D_MISC, "%s: mfii_shutdown\n", DEVNAME(sc));
	ccb = mfii_get_ccb(sc);
	if (ccb == NULL)
		return false;
	mutex_enter(&sc->sc_ccb_mtx);
	if (sc->sc_running) {
		sc->sc_running = 0; /* prevent new commands */
		mutex_exit(&sc->sc_ccb_mtx);
#if 0 /* XXX why does this hang ? */
		mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
		mfii_scrub_ccb(ccb);
		if (mfii_do_mgmt(sc, ccb, MR_DCMD_CTRL_CACHE_FLUSH, &mbox,
		    NULL, 0, MFII_DATA_NONE, true)) {
			aprint_error_dev(dev,
			    "shutdown: cache flush failed\n");
			rv = false;
			goto fail;
		}
		printf("ok1\n");
#endif
		mbox.b[0] = 0;
		mfii_scrub_ccb(ccb);
		if (mfii_do_mgmt(sc, ccb, MR_DCMD_CTRL_SHUTDOWN, &mbox,
		    NULL, 0, MFII_DATA_NONE, true)) {
			aprint_error_dev(dev, "shutdown: "
			    "firmware shutdown failed\n");
			rv = false;
			goto fail;
		}
	} else {
		mutex_exit(&sc->sc_ccb_mtx);
	}
fail:
	mfii_put_ccb(sc, ccb);
	mutex_exit(&sc->sc_lock);
	return rv;
}

static u_int32_t
mfii_read(struct mfii_softc *sc, bus_size_t r)
{
	bus_space_barrier(sc->sc_iot, sc->sc_ioh, r, 4,
	    BUS_SPACE_BARRIER_READ);
	return (bus_space_read_4(sc->sc_iot, sc->sc_ioh, r));
}

static void
mfii_write(struct mfii_softc *sc, bus_size_t r, u_int32_t v)
{
	bus_space_write_4(sc->sc_iot, sc->sc_ioh, r, v);
	bus_space_barrier(sc->sc_iot, sc->sc_ioh, r, 4,
	    BUS_SPACE_BARRIER_WRITE);
}

static struct mfii_dmamem *
mfii_dmamem_alloc(struct mfii_softc *sc, size_t size)
{
	struct mfii_dmamem *m;
	int nsegs;

	m = malloc(sizeof(*m), M_DEVBUF, M_NOWAIT | M_ZERO);
	if (m == NULL)
		return (NULL);

	m->mdm_size = size;

	if (bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
	    BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &m->mdm_map) != 0)
		goto mdmfree;

	if (bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &m->mdm_seg, 1,
	    &nsegs, BUS_DMA_NOWAIT) != 0)
		goto destroy;

	if (bus_dmamem_map(sc->sc_dmat, &m->mdm_seg, nsegs, size, &m->mdm_kva,
	    BUS_DMA_NOWAIT) != 0)
		goto free;

	if (bus_dmamap_load(sc->sc_dmat, m->mdm_map, m->mdm_kva, size, NULL,
	    BUS_DMA_NOWAIT) != 0)
		goto unmap;

	memset(m->mdm_kva, 0, size);
	return (m);

unmap:
	bus_dmamem_unmap(sc->sc_dmat, m->mdm_kva, m->mdm_size);
free:
	bus_dmamem_free(sc->sc_dmat, &m->mdm_seg, 1);
destroy:
	bus_dmamap_destroy(sc->sc_dmat, m->mdm_map);
mdmfree:
	free(m, M_DEVBUF);

	return (NULL);
}

static void
mfii_dmamem_free(struct mfii_softc *sc, struct mfii_dmamem *m)
{
	bus_dmamap_unload(sc->sc_dmat, m->mdm_map);
	bus_dmamem_unmap(sc->sc_dmat, m->mdm_kva, m->mdm_size);
	bus_dmamem_free(sc->sc_dmat, &m->mdm_seg, 1);
	bus_dmamap_destroy(sc->sc_dmat, m->mdm_map);
	free(m, M_DEVBUF);
}

static void
mfii_dcmd_start(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	struct mpii_msg_scsi_io *io = ccb->ccb_request;
	struct mfii_raid_context *ctx = (struct mfii_raid_context *)(io + 1);
	struct mfii_sge *sge = (struct mfii_sge *)(ctx + 1);

	io->function = MFII_FUNCTION_PASSTHRU_IO;
	io->sgl_offset0 = (uint32_t *)sge - (uint32_t *)io;
	io->chain_offset = io->sgl_offset0 / 4;

	sge->sg_addr = htole64(ccb->ccb_sense_dva);
	sge->sg_len = htole32(sizeof(*ccb->ccb_sense));
	sge->sg_flags = MFII_SGE_CHAIN_ELEMENT | MFII_SGE_ADDR_IOCPLBNTA;

	ccb->ccb_req.flags = MFII_REQ_TYPE_SCSI;
	ccb->ccb_req.smid = le16toh(ccb->ccb_smid);

	mfii_start(sc, ccb);
}

static int
mfii_aen_register(struct mfii_softc *sc)
{
	struct mfi_evt_log_info mel;
	struct mfii_ccb *ccb;
	struct mfii_dmamem *mdm;
	int rv;

	ccb = mfii_get_ccb(sc);
	if (ccb == NULL) {
		printf("%s: unable to allocate ccb for aen\n", DEVNAME(sc));
		return (ENOMEM);
	}

	memset(&mel, 0, sizeof(mel));
	mfii_scrub_ccb(ccb);

	rv = mfii_do_mgmt(sc, ccb, MR_DCMD_CTRL_EVENT_GET_INFO, NULL,
	    &mel, sizeof(mel), MFII_DATA_IN, true);
	if (rv != 0) {
		mfii_put_ccb(sc, ccb);
		aprint_error_dev(sc->sc_dev, "unable to get event info\n");
		return (EIO);
	}

	mdm = mfii_dmamem_alloc(sc, sizeof(struct mfi_evt_detail));
	if (mdm == NULL) {
		mfii_put_ccb(sc, ccb);
		aprint_error_dev(sc->sc_dev,
		    "unable to allocate event data\n");
		return (ENOMEM);
	}

	/* replay all the events from boot */
	mfii_aen_start(sc, ccb, mdm, le32toh(mel.mel_boot_seq_num));

	return (0);
}

static void
mfii_aen_start(struct mfii_softc *sc, struct mfii_ccb *ccb,
    struct mfii_dmamem *mdm, uint32_t seq)
{
	struct mfi_dcmd_frame *dcmd = mfii_dcmd_frame(ccb);
	struct mfi_frame_header *hdr = &dcmd->mdf_header;
	union mfi_sgl *sgl = &dcmd->mdf_sgl;
	union mfi_evt_class_locale mec;

	mfii_scrub_ccb(ccb);
	mfii_dcmd_scrub(ccb);
	memset(MFII_DMA_KVA(mdm), 0, MFII_DMA_LEN(mdm));

	ccb->ccb_cookie = mdm;
	ccb->ccb_done = mfii_aen_done;
	sc->sc_aen_ccb = ccb;

	mec.mec_members.class = MFI_EVT_CLASS_DEBUG;
	mec.mec_members.reserved = 0;
	mec.mec_members.locale = htole16(MFI_EVT_LOCALE_ALL);

	hdr->mfh_cmd = MFI_CMD_DCMD;
	hdr->mfh_sg_count = 1;
	hdr->mfh_flags = htole16(MFI_FRAME_DIR_READ | MFI_FRAME_SGL64);
	hdr->mfh_data_len = htole32(MFII_DMA_LEN(mdm));
	dcmd->mdf_opcode = htole32(MR_DCMD_CTRL_EVENT_WAIT);
	dcmd->mdf_mbox.w[0] = htole32(seq);
	dcmd->mdf_mbox.w[1] = htole32(mec.mec_word);
	sgl->sg64[0].addr = htole64(MFII_DMA_DVA(mdm));
	sgl->sg64[0].len = htole32(MFII_DMA_LEN(mdm));

	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(mdm),
	    0, MFII_DMA_LEN(mdm), BUS_DMASYNC_PREREAD);

	mfii_dcmd_sync(sc, ccb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
	mfii_dcmd_start(sc, ccb);
}

static void
mfii_aen_done(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	KASSERT(sc->sc_aen_ccb == ccb);

	/*
	 * defer to a thread with KERNEL_LOCK so we can run autoconf
	 * We shouldn't have more than one AEN command pending at a time,
	 * so no need to lock
	 */
	if (sc->sc_running)
		workqueue_enqueue(sc->sc_aen_wq, &sc->sc_aen_work, NULL);
}

static void
mfii_aen(struct work *wk, void *arg)
{
	struct mfii_softc *sc = arg;
	struct mfii_ccb *ccb = sc->sc_aen_ccb;
	struct mfii_dmamem *mdm = ccb->ccb_cookie;
	const struct mfi_evt_detail *med = MFII_DMA_KVA(mdm);

	mfii_dcmd_sync(sc, ccb,
	    BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(mdm),
	    0, MFII_DMA_LEN(mdm), BUS_DMASYNC_POSTREAD);

	DNPRINTF(MFII_D_MISC, "%s: %u %08x %02x %s\n", DEVNAME(sc),
	    le32toh(med->med_seq_num), le32toh(med->med_code),
	    med->med_arg_type, med->med_description);

	switch (le32toh(med->med_code)) {
	case MR_EVT_PD_INSERTED_EXT:
		if (med->med_arg_type != MR_EVT_ARGS_PD_ADDRESS)
			break;

		mfii_aen_pd_insert(sc, &med->args.pd_address);
		break;
	case MR_EVT_PD_REMOVED_EXT:
		if (med->med_arg_type != MR_EVT_ARGS_PD_ADDRESS)
			break;

		mfii_aen_pd_remove(sc, &med->args.pd_address);
		break;

	case MR_EVT_PD_STATE_CHANGE:
		if (med->med_arg_type != MR_EVT_ARGS_PD_STATE)
			break;

		mfii_aen_pd_state_change(sc, &med->args.pd_state);
		break;

	case MR_EVT_LD_CREATED:
	case MR_EVT_LD_DELETED:
		mfii_aen_ld_update(sc);
		break;

	default:
		break;
	}

	mfii_aen_start(sc, ccb, mdm, le32toh(med->med_seq_num) + 1);
}

static void
mfii_aen_pd_insert(struct mfii_softc *sc,
    const struct mfi_evtarg_pd_address *pd)
{
	printf("%s: physical disk inserted id %d enclosure %d\n", DEVNAME(sc),
	    le16toh(pd->device_id), le16toh(pd->encl_id));
}

static void
mfii_aen_pd_remove(struct mfii_softc *sc,
    const struct mfi_evtarg_pd_address *pd)
{
	printf("%s: physical disk removed id %d enclosure %d\n", DEVNAME(sc),
	    le16toh(pd->device_id), le16toh(pd->encl_id));
}

static void
mfii_aen_pd_state_change(struct mfii_softc *sc,
    const struct mfi_evtarg_pd_state *state)
{
	return;
}

static void
mfii_aen_ld_update(struct mfii_softc *sc)
{
	int i, target, old, nld;
	int newlds[MFI_MAX_LD];

	mutex_enter(&sc->sc_lock);
	if (mfii_mgmt(sc, MR_DCMD_LD_GET_LIST, NULL, &sc->sc_ld_list,
	    sizeof(sc->sc_ld_list), MFII_DATA_IN, false) != 0) {
		mutex_exit(&sc->sc_lock);
		DNPRINTF(MFII_D_MISC,
		    "%s: getting list of logical disks failed\n", DEVNAME(sc));
		return;
	}
	mutex_exit(&sc->sc_lock);

	memset(newlds, -1, sizeof(newlds));

	for (i = 0; i < sc->sc_ld_list.mll_no_ld; i++) {
		target = sc->sc_ld_list.mll_list[i].mll_ld.mld_target;
		DNPRINTF(MFII_D_MISC, "%s: target %d: state %d\n",
		    DEVNAME(sc), target, sc->sc_ld_list.mll_list[i].mll_state);
		newlds[target] = i;
	}

	for (i = 0; i < MFI_MAX_LD; i++) {
		old = sc->sc_target_lds[i];
		nld = newlds[i];

		if (old == -1 && nld != -1) {
			printf("%s: logical drive %d added (target %d)\n",
			    DEVNAME(sc), i, nld);

			// XXX scsi_probe_target(sc->sc_scsibus, i);

			mfii_init_ld_sensor(sc, &sc->sc_sensors[i], i);
			mfii_attach_sensor(sc, &sc->sc_sensors[i]);
		} else if (nld == -1 && old != -1) {
			printf("%s: logical drive %d removed (target %d)\n",
			    DEVNAME(sc), i, old);

			scsipi_target_detach(&sc->sc_chan, i, 0, DETACH_FORCE);
			sysmon_envsys_sensor_detach(sc->sc_sme,
			    &sc->sc_sensors[i]);
		}
	}

	memcpy(sc->sc_target_lds, newlds, sizeof(sc->sc_target_lds));
}

static void
mfii_aen_unregister(struct mfii_softc *sc)
{
	/* XXX */
}

static int
mfii_transition_firmware(struct mfii_softc *sc)
{
	int32_t			fw_state, cur_state;
	int			max_wait, i;

	fw_state = mfii_fw_state(sc) & MFI_STATE_MASK;

	while (fw_state != MFI_STATE_READY) {
		cur_state = fw_state;
		switch (fw_state) {
		case MFI_STATE_FAULT:
			printf("%s: firmware fault\n", DEVNAME(sc));
			return (1);
		case MFI_STATE_WAIT_HANDSHAKE:
			mfii_write(sc, MFI_SKINNY_IDB,
			    MFI_INIT_CLEAR_HANDSHAKE);
			max_wait = 2;
			break;
		case MFI_STATE_OPERATIONAL:
			mfii_write(sc, MFI_SKINNY_IDB, MFI_INIT_READY);
			max_wait = 10;
			break;
		case MFI_STATE_UNDEFINED:
		case MFI_STATE_BB_INIT:
			max_wait = 2;
			break;
		case MFI_STATE_FW_INIT:
		case MFI_STATE_DEVICE_SCAN:
		case MFI_STATE_FLUSH_CACHE:
			max_wait = 20;
			break;
		default:
			printf("%s: unknown firmware state %d\n",
			    DEVNAME(sc), fw_state);
			return (1);
		}
		for (i = 0; i < (max_wait * 10); i++) {
			fw_state = mfii_fw_state(sc) & MFI_STATE_MASK;
			if (fw_state == cur_state)
				DELAY(100000);
			else
				break;
		}
		if (fw_state == cur_state) {
			printf("%s: firmware stuck in state %#x\n",
			    DEVNAME(sc), fw_state);
			return (1);
		}
	}

	return (0);
}

static int
mfii_get_info(struct mfii_softc *sc)
{
	int i, rv;

	rv = mfii_mgmt(sc, MR_DCMD_CTRL_GET_INFO, NULL, &sc->sc_info,
	    sizeof(sc->sc_info), MFII_DATA_IN, true);

	if (rv != 0)
		return (rv);

	for (i = 0; i < sc->sc_info.mci_image_component_count; i++) {
		DPRINTF("%s: active FW %s Version %s date %s time %s\n",
		    DEVNAME(sc),
		    sc->sc_info.mci_image_component[i].mic_name,
		    sc->sc_info.mci_image_component[i].mic_version,
		    sc->sc_info.mci_image_component[i].mic_build_date,
		    sc->sc_info.mci_image_component[i].mic_build_time);
	}

	for (i = 0; i < sc->sc_info.mci_pending_image_component_count; i++) {
		DPRINTF("%s: pending FW %s Version %s date %s time %s\n",
		    DEVNAME(sc),
		    sc->sc_info.mci_pending_image_component[i].mic_name,
		    sc->sc_info.mci_pending_image_component[i].mic_version,
		    sc->sc_info.mci_pending_image_component[i].mic_build_date,
		    sc->sc_info.mci_pending_image_component[i].mic_build_time);
	}

	DPRINTF("%s: max_arms %d max_spans %d max_arrs %d max_lds %d name %s\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_max_arms,
	    sc->sc_info.mci_max_spans,
	    sc->sc_info.mci_max_arrays,
	    sc->sc_info.mci_max_lds,
	    sc->sc_info.mci_product_name);

	DPRINTF("%s: serial %s present %#x fw time %d max_cmds %d max_sg %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_serial_number,
	    sc->sc_info.mci_hw_present,
	    sc->sc_info.mci_current_fw_time,
	    sc->sc_info.mci_max_cmds,
	    sc->sc_info.mci_max_sg_elements);

	DPRINTF("%s: max_rq %d lds_pres %d lds_deg %d lds_off %d pd_pres %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_max_request_size,
	    sc->sc_info.mci_lds_present,
	    sc->sc_info.mci_lds_degraded,
	    sc->sc_info.mci_lds_offline,
	    sc->sc_info.mci_pd_present);

	DPRINTF("%s: pd_dsk_prs %d pd_dsk_pred_fail %d pd_dsk_fail %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_pd_disks_present,
	    sc->sc_info.mci_pd_disks_pred_failure,
	    sc->sc_info.mci_pd_disks_failed);

	DPRINTF("%s: nvram %d mem %d flash %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_nvram_size,
	    sc->sc_info.mci_memory_size,
	    sc->sc_info.mci_flash_size);

	DPRINTF("%s: ram_cor %d ram_uncor %d clus_all %d clus_act %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_ram_correctable_errors,
	    sc->sc_info.mci_ram_uncorrectable_errors,
	    sc->sc_info.mci_cluster_allowed,
	    sc->sc_info.mci_cluster_active);

	DPRINTF("%s: max_strps_io %d raid_lvl %#x adapt_ops %#x ld_ops %#x\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_max_strips_per_io,
	    sc->sc_info.mci_raid_levels,
	    sc->sc_info.mci_adapter_ops,
	    sc->sc_info.mci_ld_ops);

	DPRINTF("%s: strp_sz_min %d strp_sz_max %d pd_ops %#x pd_mix %#x\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_stripe_sz_ops.min,
	    sc->sc_info.mci_stripe_sz_ops.max,
	    sc->sc_info.mci_pd_ops,
	    sc->sc_info.mci_pd_mix_support);

	DPRINTF("%s: ecc_bucket %d pckg_prop %s\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_ecc_bucket_count,
	    sc->sc_info.mci_package_version);

	DPRINTF("%s: sq_nm %d prd_fail_poll %d intr_thrtl %d intr_thrtl_to %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_properties.mcp_seq_num,
	    sc->sc_info.mci_properties.mcp_pred_fail_poll_interval,
	    sc->sc_info.mci_properties.mcp_intr_throttle_cnt,
	    sc->sc_info.mci_properties.mcp_intr_throttle_timeout);

	DPRINTF("%s: rbld_rate %d patr_rd_rate %d bgi_rate %d cc_rate %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_properties.mcp_rebuild_rate,
	    sc->sc_info.mci_properties.mcp_patrol_read_rate,
	    sc->sc_info.mci_properties.mcp_bgi_rate,
	    sc->sc_info.mci_properties.mcp_cc_rate);

	DPRINTF("%s: rc_rate %d ch_flsh %d spin_cnt %d spin_dly %d clus_en %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_properties.mcp_recon_rate,
	    sc->sc_info.mci_properties.mcp_cache_flush_interval,
	    sc->sc_info.mci_properties.mcp_spinup_drv_cnt,
	    sc->sc_info.mci_properties.mcp_spinup_delay,
	    sc->sc_info.mci_properties.mcp_cluster_enable);

	DPRINTF("%s: coerc %d alarm %d dis_auto_rbld %d dis_bat_wrn %d ecc %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_properties.mcp_coercion_mode,
	    sc->sc_info.mci_properties.mcp_alarm_enable,
	    sc->sc_info.mci_properties.mcp_disable_auto_rebuild,
	    sc->sc_info.mci_properties.mcp_disable_battery_warn,
	    sc->sc_info.mci_properties.mcp_ecc_bucket_size);

	DPRINTF("%s: ecc_leak %d rest_hs %d exp_encl_dev %d\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_properties.mcp_ecc_bucket_leak_rate,
	    sc->sc_info.mci_properties.mcp_restore_hotspare_on_insertion,
	    sc->sc_info.mci_properties.mcp_expose_encl_devices);

	DPRINTF("%s: vendor %#x device %#x subvendor %#x subdevice %#x\n",
	    DEVNAME(sc),
	    sc->sc_info.mci_pci.mip_vendor,
	    sc->sc_info.mci_pci.mip_device,
	    sc->sc_info.mci_pci.mip_subvendor,
	    sc->sc_info.mci_pci.mip_subdevice);

	DPRINTF("%s: type %#x port_count %d port_addr ",
	    DEVNAME(sc),
	    sc->sc_info.mci_host.mih_type,
	    sc->sc_info.mci_host.mih_port_count);

	for (i = 0; i < 8; i++)
		DPRINTF("%.0" PRIx64 " ",
		    sc->sc_info.mci_host.mih_port_addr[i]);
	DPRINTF("\n");

	DPRINTF("%s: type %.x port_count %d port_addr ",
	    DEVNAME(sc),
	    sc->sc_info.mci_device.mid_type,
	    sc->sc_info.mci_device.mid_port_count);

	for (i = 0; i < 8; i++)
		DPRINTF("%.0" PRIx64 " ",
		    sc->sc_info.mci_device.mid_port_addr[i]);
	DPRINTF("\n");

	return (0);
}

static int
mfii_mfa_poll(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	struct mfi_frame_header	*hdr = ccb->ccb_request;
	u_int64_t r;
	int to = 0, rv = 0;

#ifdef DIAGNOSTIC
	if (ccb->ccb_cookie != NULL || ccb->ccb_done != NULL)
		panic("mfii_mfa_poll called with cookie or done set");
#endif

	hdr->mfh_context = ccb->ccb_smid;
	hdr->mfh_cmd_status = MFI_STAT_INVALID_STATUS;
	hdr->mfh_flags |= htole16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);

	r = MFII_REQ_MFA(ccb->ccb_request_dva);
	memcpy(&ccb->ccb_req, &r, sizeof(ccb->ccb_req));

	mfii_start(sc, ccb);

	for (;;) {
		bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_requests),
		    ccb->ccb_request_offset, MFII_REQUEST_SIZE,
		    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);

		if (hdr->mfh_cmd_status != MFI_STAT_INVALID_STATUS)
			break;

		if (to++ > 5000) { /* XXX 5 seconds busywait sucks */
			printf("%s: timeout on ccb %d\n", DEVNAME(sc),
			    ccb->ccb_smid);
			ccb->ccb_flags |= MFI_CCB_F_ERR;
			rv = 1;
			break;
		}

		bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_requests),
		    ccb->ccb_request_offset, MFII_REQUEST_SIZE,
		    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);

		delay(1000);
	}

	if (ccb->ccb_len > 0) {
		bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap32,
		    0, ccb->ccb_dmamap32->dm_mapsize,
		    (ccb->ccb_direction == MFII_DATA_IN) ?
		    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);

		bus_dmamap_unload(sc->sc_dmat, ccb->ccb_dmamap32);
	}

	return (rv);
}

static int
mfii_poll(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	void (*done)(struct mfii_softc *, struct mfii_ccb *);
	void *cookie;
	int rv = 1;

	done = ccb->ccb_done;
	cookie = ccb->ccb_cookie;

	ccb->ccb_done = mfii_poll_done;
	ccb->ccb_cookie = &rv;

	mfii_start(sc, ccb);

	do {
		delay(10);
		mfii_postq(sc);
	} while (rv == 1);

	ccb->ccb_cookie = cookie;
	done(sc, ccb);

	return (0);
}

static void
mfii_poll_done(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	int *rv = ccb->ccb_cookie;

	*rv = 0;
}

static int
mfii_exec(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
#ifdef DIAGNOSTIC
	if (ccb->ccb_cookie != NULL || ccb->ccb_done != NULL)
		panic("mfii_exec called with cookie or done set");
#endif

	ccb->ccb_cookie = ccb;
	ccb->ccb_done = mfii_exec_done;

	mfii_start(sc, ccb);

	mutex_enter(&ccb->ccb_mtx);
	while (ccb->ccb_cookie != NULL)
		cv_wait(&ccb->ccb_cv, &ccb->ccb_mtx);
	mutex_exit(&ccb->ccb_mtx);

	return (0);
}

static void
mfii_exec_done(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	mutex_enter(&ccb->ccb_mtx);
	ccb->ccb_cookie = NULL;
	cv_signal(&ccb->ccb_cv);
	mutex_exit(&ccb->ccb_mtx);
}

static int
mfii_mgmt(struct mfii_softc *sc, uint32_t opc, const union mfi_mbox *mbox,
    void *buf, size_t len, mfii_direction_t dir, bool poll)
{
	struct mfii_ccb *ccb;
	int rv;

	KASSERT(mutex_owned(&sc->sc_lock));
	if (!sc->sc_running)
		return EAGAIN;

	ccb = mfii_get_ccb(sc);
	if (ccb == NULL)
		return (ENOMEM);

	mfii_scrub_ccb(ccb);
	rv = mfii_do_mgmt(sc, ccb, opc, mbox, buf, len, dir, poll);
	mfii_put_ccb(sc, ccb);

	return (rv);
}

static int
mfii_do_mgmt(struct mfii_softc *sc, struct mfii_ccb *ccb, uint32_t opc,
    const union mfi_mbox *mbox, void *buf, size_t len, mfii_direction_t dir,
    bool poll)
{
	struct mpii_msg_scsi_io *io = ccb->ccb_request;
	struct mfii_raid_context *ctx = (struct mfii_raid_context *)(io + 1);
	struct mfii_sge *sge = (struct mfii_sge *)(ctx + 1);
	struct mfi_dcmd_frame *dcmd = ccb->ccb_mfi;
	struct mfi_frame_header *hdr = &dcmd->mdf_header;
	int rv = EIO;

	if (cold)
		poll = true;

	ccb->ccb_data = buf;
	ccb->ccb_len = len;
	ccb->ccb_direction = dir;
	switch (dir) {
	case MFII_DATA_IN:
		hdr->mfh_flags = htole16(MFI_FRAME_DIR_READ);
		break;
	case MFII_DATA_OUT:
		hdr->mfh_flags = htole16(MFI_FRAME_DIR_WRITE);
		break;
	case MFII_DATA_NONE:
		hdr->mfh_flags = htole16(MFI_FRAME_DIR_NONE);
		break;
	}

	if (mfii_load_mfa(sc, ccb, &dcmd->mdf_sgl, poll) != 0) {
		rv = ENOMEM;
		goto done;
	}

	hdr->mfh_cmd = MFI_CMD_DCMD;
	hdr->mfh_context = ccb->ccb_smid;
	hdr->mfh_data_len = htole32(len);
	hdr->mfh_sg_count = ccb->ccb_dmamap32->dm_nsegs;
	KASSERT(!ccb->ccb_dma64);

	dcmd->mdf_opcode = opc;
	/* handle special opcodes */
	if (mbox != NULL)
		memcpy(&dcmd->mdf_mbox, mbox, sizeof(dcmd->mdf_mbox));

	io->function = MFII_FUNCTION_PASSTHRU_IO;
	io->sgl_offset0 = ((u_int8_t *)sge - (u_int8_t *)io) / 4;
	io->chain_offset = ((u_int8_t *)sge - (u_int8_t *)io) / 16;

	sge->sg_addr = htole64(ccb->ccb_mfi_dva);
	sge->sg_len = htole32(MFI_FRAME_SIZE);
	sge->sg_flags = MFII_SGE_CHAIN_ELEMENT | MFII_SGE_ADDR_IOCPLBNTA;

	ccb->ccb_req.flags = MFII_REQ_TYPE_SCSI;
	ccb->ccb_req.smid = le16toh(ccb->ccb_smid);

	if (poll) {
		ccb->ccb_done = mfii_empty_done;
		mfii_poll(sc, ccb);
	} else
		mfii_exec(sc, ccb);

	if (hdr->mfh_cmd_status == MFI_STAT_OK) {
		rv = 0;
	}

done:
	return (rv);
}

static void
mfii_empty_done(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	return;
}

static int
mfii_load_mfa(struct mfii_softc *sc, struct mfii_ccb *ccb,
    void *sglp, int nosleep)
{
	union mfi_sgl *sgl = sglp;
	bus_dmamap_t dmap = ccb->ccb_dmamap32;
	int error;
	int i;

	KASSERT(!ccb->ccb_dma64);
	if (ccb->ccb_len == 0)
		return (0);

	error = bus_dmamap_load(sc->sc_dmat, dmap,
	    ccb->ccb_data, ccb->ccb_len, NULL,
	    nosleep ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
	if (error) {
		printf("%s: error %d loading dmamap\n", DEVNAME(sc), error);
		return (1);
	}

	for (i = 0; i < dmap->dm_nsegs; i++) {
		sgl->sg32[i].addr = htole32(dmap->dm_segs[i].ds_addr);
		sgl->sg32[i].len = htole32(dmap->dm_segs[i].ds_len);
	}

	bus_dmamap_sync(sc->sc_dmat, dmap, 0, dmap->dm_mapsize,
	    ccb->ccb_direction == MFII_DATA_OUT ?
	    BUS_DMASYNC_PREWRITE : BUS_DMASYNC_PREREAD);

	return (0);
}

static void
mfii_start(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	uint32_t *r = (uint32_t *)&ccb->ccb_req;
#if defined(__LP64__)
	uint64_t buf;
#endif

	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_requests),
	    ccb->ccb_request_offset, MFII_REQUEST_SIZE,
	    BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);

#if defined(__LP64__)
	buf = ((uint64_t)r[1] << 32) | r[0];
	bus_space_write_8(sc->sc_iot, sc->sc_ioh, MFI_IQPL, buf);
#else
	mutex_enter(&sc->sc_post_mtx);
	bus_space_write_4(sc->sc_iot, sc->sc_ioh, MFI_IQPL, r[0]);
	bus_space_write_4(sc->sc_iot, sc->sc_ioh, MFI_IQPH, r[1]);
	bus_space_barrier(sc->sc_iot, sc->sc_ioh,
	    MFI_IQPL, 8, BUS_SPACE_BARRIER_WRITE);
	mutex_exit(&sc->sc_post_mtx);
#endif
}

static void
mfii_done(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_requests),
	    ccb->ccb_request_offset, MFII_REQUEST_SIZE,
	    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);

	if (ccb->ccb_sgl_len > 0) {
		bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_sgl),
		    ccb->ccb_sgl_offset, ccb->ccb_sgl_len,
		    BUS_DMASYNC_POSTWRITE);
	}

	if (ccb->ccb_dma64) {
		KASSERT(ccb->ccb_len > 0);
		bus_dmamap_sync(sc->sc_dmat64, ccb->ccb_dmamap64,
		    0, ccb->ccb_dmamap64->dm_mapsize,
		    (ccb->ccb_direction == MFII_DATA_IN) ?
		    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);

		bus_dmamap_unload(sc->sc_dmat64, ccb->ccb_dmamap64);
	} else if (ccb->ccb_len > 0) {
		bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap32,
		    0, ccb->ccb_dmamap32->dm_mapsize,
		    (ccb->ccb_direction == MFII_DATA_IN) ?
		    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);

		bus_dmamap_unload(sc->sc_dmat, ccb->ccb_dmamap32);
	}

	ccb->ccb_done(sc, ccb);
}

static int
mfii_initialise_firmware(struct mfii_softc *sc)
{
	struct mpii_msg_iocinit_request *iiq;
	struct mfii_dmamem *m;
	struct mfii_ccb *ccb;
	struct mfi_init_frame *init;
	int rv;

	m = mfii_dmamem_alloc(sc, sizeof(*iiq));
	if (m == NULL)
		return (1);

	iiq = MFII_DMA_KVA(m);
	memset(iiq, 0, sizeof(*iiq));

	iiq->function = MPII_FUNCTION_IOC_INIT;
	iiq->whoinit = MPII_WHOINIT_HOST_DRIVER;

	iiq->msg_version_maj = 0x02;
	iiq->msg_version_min = 0x00;
	iiq->hdr_version_unit = 0x10;
	iiq->hdr_version_dev = 0x0;

	iiq->system_request_frame_size = htole16(MFII_REQUEST_SIZE / 4);

	iiq->reply_descriptor_post_queue_depth =
	    htole16(sc->sc_reply_postq_depth);
	iiq->reply_free_queue_depth = htole16(0);

	iiq->sense_buffer_address_high = htole32(
	    MFII_DMA_DVA(sc->sc_sense) >> 32);

	iiq->reply_descriptor_post_queue_address_lo =
	    htole32(MFII_DMA_DVA(sc->sc_reply_postq));
	iiq->reply_descriptor_post_queue_address_hi =
	    htole32(MFII_DMA_DVA(sc->sc_reply_postq) >> 32);

	iiq->system_request_frame_base_address_lo =
	    htole32(MFII_DMA_DVA(sc->sc_requests));
	iiq->system_request_frame_base_address_hi =
	    htole32(MFII_DMA_DVA(sc->sc_requests) >> 32);

	iiq->timestamp = htole64(time_uptime);

	ccb = mfii_get_ccb(sc);
	if (ccb == NULL) {
		/* shouldn't ever run out of ccbs during attach */
		return (1);
	}
	mfii_scrub_ccb(ccb);
	init = ccb->ccb_request;

	init->mif_header.mfh_cmd = MFI_CMD_INIT;
	init->mif_header.mfh_data_len = htole32(sizeof(*iiq));
	init->mif_qinfo_new_addr_lo = htole32(MFII_DMA_DVA(m));
	init->mif_qinfo_new_addr_hi = htole32((uint64_t)MFII_DMA_DVA(m) >> 32);

	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_reply_postq),
	    0, MFII_DMA_LEN(sc->sc_reply_postq),
	    BUS_DMASYNC_PREREAD);

	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(m),
	    0, sizeof(*iiq), BUS_DMASYNC_PREREAD);

	rv = mfii_mfa_poll(sc, ccb);

	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(m),
	    0, sizeof(*iiq), BUS_DMASYNC_POSTREAD);

	mfii_put_ccb(sc, ccb);
	mfii_dmamem_free(sc, m);

	return (rv);
}

static int
mfii_my_intr(struct mfii_softc *sc)
{
	u_int32_t status;

	status = mfii_read(sc, MFI_OSTS);

	DNPRINTF(MFII_D_INTR, "%s: intr status 0x%x\n", DEVNAME(sc), status);
	if (ISSET(status, 0x1)) {
		mfii_write(sc, MFI_OSTS, status);
		return (1);
	}

	return (ISSET(status, MFII_OSTS_INTR_VALID) ? 1 : 0);
}

static int
mfii_intr(void *arg)
{
	struct mfii_softc *sc = arg;

	if (!mfii_my_intr(sc))
		return (0);

	mfii_postq(sc);

	return (1);
}

static void
mfii_postq(struct mfii_softc *sc)
{
	struct mfii_ccb_list ccbs = SIMPLEQ_HEAD_INITIALIZER(ccbs);
	struct mpii_reply_descr *postq = MFII_DMA_KVA(sc->sc_reply_postq);
	struct mpii_reply_descr *rdp;
	struct mfii_ccb *ccb;
	int rpi = 0;

	mutex_enter(&sc->sc_reply_postq_mtx);

	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_reply_postq),
	    0, MFII_DMA_LEN(sc->sc_reply_postq),
	    BUS_DMASYNC_POSTREAD);

	for (;;) {
		rdp = &postq[sc->sc_reply_postq_index];
		DNPRINTF(MFII_D_INTR,
		    "%s: mfii_postq index %d flags 0x%x data 0x%x\n",
		    DEVNAME(sc), sc->sc_reply_postq_index, rdp->reply_flags,
			rdp->data == 0xffffffff);
		if ((rdp->reply_flags & MPII_REPLY_DESCR_TYPE_MASK) ==
		    MPII_REPLY_DESCR_UNUSED)
			break;
		if (rdp->data == 0xffffffff) {
			/*
			 * ioc is still writing to the reply post queue
			 * race condition - bail!
			 */
			break;
		}

		ccb = &sc->sc_ccb[le16toh(rdp->smid) - 1];
		SIMPLEQ_INSERT_TAIL(&ccbs, ccb, ccb_link);
		memset(rdp, 0xff, sizeof(*rdp));

		sc->sc_reply_postq_index++;
		sc->sc_reply_postq_index %= sc->sc_reply_postq_depth;
		rpi = 1;
	}

	bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_reply_postq),
	    0, MFII_DMA_LEN(sc->sc_reply_postq),
	    BUS_DMASYNC_PREREAD);

	if (rpi)
		mfii_write(sc, MFII_RPI, sc->sc_reply_postq_index);

	mutex_exit(&sc->sc_reply_postq_mtx);

	while ((ccb = SIMPLEQ_FIRST(&ccbs)) != NULL) {
		SIMPLEQ_REMOVE_HEAD(&ccbs, ccb_link);
		mfii_done(sc, ccb);
	}
}

static void
mfii_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req,
    void *arg)
{
	struct scsipi_periph    *periph;
	struct scsipi_xfer	*xs;
	struct scsipi_adapter   *adapt = chan->chan_adapter;
	struct mfii_softc	*sc = device_private(adapt->adapt_dev);
	struct mfii_ccb *ccb;
	int timeout;
	int target;

	switch (req) {
		case ADAPTER_REQ_GROW_RESOURCES:
		/* Not supported. */
		return;
	case ADAPTER_REQ_SET_XFER_MODE:
	{
		struct scsipi_xfer_mode *xm = arg;
		xm->xm_mode = PERIPH_CAP_TQING;
		xm->xm_period = 0;
		xm->xm_offset = 0;
		scsipi_async_event(&sc->sc_chan, ASYNC_EVENT_XFER_MODE, xm);
		return;
	}
	case ADAPTER_REQ_RUN_XFER:
		break;
	}

	xs = arg;
	periph = xs->xs_periph;
	target = periph->periph_target;

	if (target >= MFI_MAX_LD || !sc->sc_ld[target].ld_present ||
	    periph->periph_lun != 0) {
		xs->error = XS_SELTIMEOUT;
		scsipi_done(xs);
		return;
	}

	if ((xs->cmd->opcode == SCSI_SYNCHRONIZE_CACHE_10 ||
	    xs->cmd->opcode == SCSI_SYNCHRONIZE_CACHE_16) && sc->sc_bbuok) {
		/* the cache is stable storage, don't flush */
		xs->error = XS_NOERROR;
		xs->status = SCSI_OK;
		xs->resid = 0;
		scsipi_done(xs);
		return;
	}

	ccb = mfii_get_ccb(sc);
	if (ccb == NULL) {
		xs->error = XS_RESOURCE_SHORTAGE;
		scsipi_done(xs);
		return;
	}
	mfii_scrub_ccb(ccb);
	ccb->ccb_cookie = xs;
	ccb->ccb_done = mfii_scsi_cmd_done;
	ccb->ccb_data = xs->data;
	ccb->ccb_len = xs->datalen;

	timeout = mstohz(xs->timeout);
	if (timeout == 0)
		timeout = 1;
	callout_reset(&xs->xs_callout, timeout, mfii_scsi_cmd_tmo, ccb);

	switch (xs->cmd->opcode) {
	case SCSI_READ_6_COMMAND:
	case READ_10:
	case READ_12:
	case READ_16:
	case SCSI_WRITE_6_COMMAND:
	case WRITE_10:
	case WRITE_12:
	case WRITE_16:
		if (mfii_scsi_cmd_io(sc, ccb, xs) != 0)
			goto stuffup;
		break;

	default:
		if (mfii_scsi_cmd_cdb(sc, ccb, xs) != 0)
			goto stuffup;
		break;
	}

	xs->error = XS_NOERROR;
	xs->resid = 0;

	DNPRINTF(MFII_D_CMD, "%s: start io %d cmd %d\n", DEVNAME(sc), target,
	    xs->cmd->opcode);

	if (xs->xs_control & XS_CTL_POLL) {
		if (mfii_poll(sc, ccb) != 0)
			goto stuffup;
		return;
	}

	mfii_start(sc, ccb);

	return;

stuffup:
	xs->error = XS_DRIVER_STUFFUP;
	scsipi_done(xs);
	mfii_put_ccb(sc, ccb);
}

static void
mfii_scsi_cmd_done(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	struct scsipi_xfer *xs = ccb->ccb_cookie;
	struct mpii_msg_scsi_io *io = ccb->ccb_request;
	struct mfii_raid_context *ctx = (struct mfii_raid_context *)(io + 1);

	if (callout_stop(&xs->xs_callout) != 0)
		return;

	switch (ctx->status) {
	case MFI_STAT_OK:
		break;

	case MFI_STAT_SCSI_DONE_WITH_ERROR:
		xs->error = XS_SENSE;
		memset(&xs->sense, 0, sizeof(xs->sense));
		memcpy(&xs->sense, ccb->ccb_sense, sizeof(xs->sense));
		break;

	case MFI_STAT_LD_OFFLINE:
	case MFI_STAT_DEVICE_NOT_FOUND:
		xs->error = XS_SELTIMEOUT;
		break;

	default:
		xs->error = XS_DRIVER_STUFFUP;
		break;
	}

	scsipi_done(xs);
	mfii_put_ccb(sc, ccb);
}

static int
mfii_scsi_cmd_io(struct mfii_softc *sc, struct mfii_ccb *ccb,
    struct scsipi_xfer *xs)
{
	struct scsipi_periph *periph = xs->xs_periph;
	struct mpii_msg_scsi_io *io = ccb->ccb_request;
	struct mfii_raid_context *ctx = (struct mfii_raid_context *)(io + 1);
	int segs;

	io->dev_handle = htole16(periph->periph_target);
	io->function = MFII_FUNCTION_LDIO_REQUEST;
	io->sense_buffer_low_address = htole32(ccb->ccb_sense_dva);
	io->sgl_flags = htole16(0x02); /* XXX */
	io->sense_buffer_length = sizeof(xs->sense);
	io->sgl_offset0 = (sizeof(*io) + sizeof(*ctx)) / 4;
	io->data_length = htole32(xs->datalen);
	io->io_flags = htole16(xs->cmdlen);
	switch (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) {
	case XS_CTL_DATA_IN:
		ccb->ccb_direction = MFII_DATA_IN;
		io->direction = MPII_SCSIIO_DIR_READ;
		break;
	case XS_CTL_DATA_OUT:
		ccb->ccb_direction = MFII_DATA_OUT;
		io->direction = MPII_SCSIIO_DIR_WRITE;
		break;
	default:
		ccb->ccb_direction = MFII_DATA_NONE;
		io->direction = MPII_SCSIIO_DIR_NONE;
		break;
	}
	memcpy(io->cdb, xs->cmd, xs->cmdlen);

	ctx->type_nseg = sc->sc_iop->ldio_ctx_type_nseg;
	ctx->timeout_value = htole16(0x14); /* XXX */
	ctx->reg_lock_flags = htole16(sc->sc_iop->ldio_ctx_reg_lock_flags);
	ctx->virtual_disk_target_id = htole16(periph->periph_target);

	if (mfii_load_ccb(sc, ccb, ctx + 1,
	    ISSET(xs->xs_control, XS_CTL_NOSLEEP)) != 0)
		return (1);

	KASSERT(ccb->ccb_len == 0 || ccb->ccb_dma64);
	segs = (ccb->ccb_len == 0) ? 0 : ccb->ccb_dmamap64->dm_nsegs;
	switch (sc->sc_iop->num_sge_loc) {
	case MFII_IOP_NUM_SGE_LOC_ORIG:
		ctx->num_sge = segs;
		break;
	case MFII_IOP_NUM_SGE_LOC_35:
		/* 12 bit field, but we're only using the lower 8 */
		ctx->span_arm = segs;
		break;
	}

	ccb->ccb_req.flags = sc->sc_iop->ldio_req_type;
	ccb->ccb_req.smid = le16toh(ccb->ccb_smid);

	return (0);
}

static int
mfii_scsi_cmd_cdb(struct mfii_softc *sc, struct mfii_ccb *ccb,
    struct scsipi_xfer *xs)
{
	struct scsipi_periph *periph = xs->xs_periph;
	struct mpii_msg_scsi_io *io = ccb->ccb_request;
	struct mfii_raid_context *ctx = (struct mfii_raid_context *)(io + 1);

	io->dev_handle = htole16(periph->periph_target);
	io->function = MFII_FUNCTION_LDIO_REQUEST;
	io->sense_buffer_low_address = htole32(ccb->ccb_sense_dva);
	io->sgl_flags = htole16(0x02); /* XXX */
	io->sense_buffer_length = sizeof(xs->sense);
	io->sgl_offset0 = (sizeof(*io) + sizeof(*ctx)) / 4;
	io->data_length = htole32(xs->datalen);
	io->io_flags = htole16(xs->cmdlen);
	io->lun[0] = htobe16(periph->periph_lun);
	switch (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) {
	case XS_CTL_DATA_IN:
		ccb->ccb_direction = MFII_DATA_IN;
		io->direction = MPII_SCSIIO_DIR_READ;
		break;
	case XS_CTL_DATA_OUT:
		ccb->ccb_direction = MFII_DATA_OUT;
		io->direction = MPII_SCSIIO_DIR_WRITE;
		break;
	default:
		ccb->ccb_direction = MFII_DATA_NONE;
		io->direction = MPII_SCSIIO_DIR_NONE;
		break;
	}
	memcpy(io->cdb, xs->cmd, xs->cmdlen);

	ctx->virtual_disk_target_id = htole16(periph->periph_target);

	if (mfii_load_ccb(sc, ccb, ctx + 1,
	    ISSET(xs->xs_control, XS_CTL_NOSLEEP)) != 0)
		return (1);

	ctx->num_sge = (ccb->ccb_len == 0) ? 0 : ccb->ccb_dmamap64->dm_nsegs;
	KASSERT(ccb->ccb_len == 0 || ccb->ccb_dma64);

	ccb->ccb_req.flags = MFII_REQ_TYPE_SCSI;
	ccb->ccb_req.smid = le16toh(ccb->ccb_smid);

	return (0);
}

#if 0
void
mfii_pd_scsi_cmd(struct scsipi_xfer *xs)
{
	struct scsi_link *link = xs->sc_link;
	struct mfii_softc *sc = link->adapter_softc;
	struct mfii_ccb *ccb = xs->io;

	mfii_scrub_ccb(ccb);
	ccb->ccb_cookie = xs;
	ccb->ccb_done = mfii_scsi_cmd_done;
	ccb->ccb_data = xs->data;
	ccb->ccb_len = xs->datalen;

	// XXX timeout_set(&xs->stimeout, mfii_scsi_cmd_tmo, xs);

	xs->error = mfii_pd_scsi_cmd_cdb(sc, xs);
	if (xs->error != XS_NOERROR)
		goto done;

	xs->resid = 0;

	if (ISSET(xs->xs_control, XS_CTL_POLL)) {
		if (mfii_poll(sc, ccb) != 0)
			goto stuffup;
		return;
	}

	// XXX timeout_add_msec(&xs->stimeout, xs->timeout);
	mfii_start(sc, ccb);

	return;

stuffup:
	xs->error = XS_DRIVER_STUFFUP;
done:
	scsi_done(xs);
}

int
mfii_pd_scsi_probe(struct scsi_link *link)
{
	struct mfii_softc *sc = link->adapter_softc;
	struct mfi_pd_details mpd;
	union mfi_mbox mbox;
	int rv;

	if (link->lun > 0)
		return (0);

	memset(&mbox, 0, sizeof(mbox));
	mbox.s[0] = htole16(link->target);

	rv = mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, &mpd, sizeof(mpd),
	    MFII_DATA_IN, true);
	if (rv != 0)
		return (EIO);

	if (mpd.mpd_fw_state != htole16(MFI_PD_SYSTEM))
		return (ENXIO);

	return (0);
}

int
mfii_pd_scsi_cmd_cdb(struct mfii_softc *sc, struct mfii_ccb *ccb,
    struct scsipi_xfer *xs)
{
	struct scsi_link *link = xs->sc_link;
	struct mpii_msg_scsi_io *io = ccb->ccb_request;
	struct mfii_raid_context *ctx = (struct mfii_raid_context *)(io + 1);
	uint16_t dev_handle;

	dev_handle = mfii_dev_handle(sc, link->target);
	if (dev_handle == htole16(0xffff))
		return (XS_SELTIMEOUT);

	io->dev_handle = dev_handle;
	io->function = 0;
	io->sense_buffer_low_address = htole32(ccb->ccb_sense_dva);
	io->sgl_flags = htole16(0x02); /* XXX */
	io->sense_buffer_length = sizeof(xs->sense);
	io->sgl_offset0 = (sizeof(*io) + sizeof(*ctx)) / 4;
	io->data_length = htole32(xs->datalen);
	io->io_flags = htole16(xs->cmdlen);
	io->lun[0] = htobe16(link->lun);
	switch (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) {
	case XS_CTL_DATA_IN:
		ccb->ccb_direction = MFII_DATA_IN;
		io->direction = MPII_SCSIIO_DIR_READ;
		break;
	case XS_CTL_DATA_OUT:
		ccb->ccb_direction = MFII_DATA_OUT;
		io->direction = MPII_SCSIIO_DIR_WRITE;
		break;
	default:
		ccb->ccb_direction = MFII_DATA_NONE;
		io->direction = MPII_SCSIIO_DIR_NONE;
		break;
	}
	memcpy(io->cdb, xs->cmd, xs->cmdlen);

	ctx->virtual_disk_target_id = htole16(link->target);
	ctx->raid_flags = MFII_RAID_CTX_IO_TYPE_SYSPD;
	ctx->timeout_value = sc->sc_pd->pd_timeout;

	if (mfii_load_ccb(sc, ccb, ctx + 1,
	    ISSET(xs->xs_control, XS_CTL_NOSLEEP)) != 0)
		return (XS_DRIVER_STUFFUP);

	ctx->num_sge = (ccb->ccb_len == 0) ? 0 : ccb->ccb_dmamap64->dm_nsegs;
	KASSERT(ccb->ccb_dma64);

	ccb->ccb_req.flags = MFII_REQ_TYPE_HI_PRI;
	ccb->ccb_req.smid = le16toh(ccb->ccb_smid);
	ccb->ccb_req.dev_handle = dev_handle;

	return (XS_NOERROR);
}
#endif

static int
mfii_load_ccb(struct mfii_softc *sc, struct mfii_ccb *ccb, void *sglp,
    int nosleep)
{
	struct mpii_msg_request *req = ccb->ccb_request;
	struct mfii_sge *sge = NULL, *nsge = sglp;
	struct mfii_sge *ce = NULL;
	bus_dmamap_t dmap = ccb->ccb_dmamap64;
	u_int space;
	int i;

	int error;

	if (ccb->ccb_len == 0)
		return (0);

	ccb->ccb_dma64 = true;
	error = bus_dmamap_load(sc->sc_dmat64, dmap,
	    ccb->ccb_data, ccb->ccb_len, NULL,
	    nosleep ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
	if (error) {
		printf("%s: error %d loading dmamap\n", DEVNAME(sc), error);
		return (1);
	}

	space = (MFII_REQUEST_SIZE - ((u_int8_t *)nsge - (u_int8_t *)req)) /
	    sizeof(*nsge);
	if (dmap->dm_nsegs > space) {
		space--;

		ccb->ccb_sgl_len = (dmap->dm_nsegs - space) * sizeof(*nsge);
		memset(ccb->ccb_sgl, 0, ccb->ccb_sgl_len);

		ce = nsge + space;
		ce->sg_addr = htole64(ccb->ccb_sgl_dva);
		ce->sg_len = htole32(ccb->ccb_sgl_len);
		ce->sg_flags = sc->sc_iop->sge_flag_chain;

		req->chain_offset = ((u_int8_t *)ce - (u_int8_t *)req) / 16;
	}

	for (i = 0; i < dmap->dm_nsegs; i++) {
		if (nsge == ce)
			nsge = ccb->ccb_sgl;

		sge = nsge;

		sge->sg_addr = htole64(dmap->dm_segs[i].ds_addr);
		sge->sg_len = htole32(dmap->dm_segs[i].ds_len);
		sge->sg_flags = MFII_SGE_ADDR_SYSTEM;

		nsge = sge + 1;
	}
	sge->sg_flags |= sc->sc_iop->sge_flag_eol;

	bus_dmamap_sync(sc->sc_dmat64, dmap, 0, dmap->dm_mapsize,
	    ccb->ccb_direction == MFII_DATA_OUT ?
	    BUS_DMASYNC_PREWRITE : BUS_DMASYNC_PREREAD);

	if (ccb->ccb_sgl_len > 0) {
		bus_dmamap_sync(sc->sc_dmat, MFII_DMA_MAP(sc->sc_sgl),
		    ccb->ccb_sgl_offset, ccb->ccb_sgl_len,
		    BUS_DMASYNC_PREWRITE);
	}

	return (0);
}

static void
mfii_scsi_cmd_tmo(void *p)
{
	struct mfii_ccb *ccb = p;
	struct mfii_softc *sc = ccb->ccb_sc;
	bool start_abort;

	printf("%s: cmd timeout ccb %p\n", DEVNAME(sc), p);

	mutex_enter(&sc->sc_abort_mtx);
	start_abort = (SIMPLEQ_FIRST(&sc->sc_abort_list) == 0);
	SIMPLEQ_INSERT_TAIL(&sc->sc_abort_list, ccb, ccb_link);
	if (start_abort)
		workqueue_enqueue(sc->sc_abort_wq, &sc->sc_abort_work, NULL);
	mutex_exit(&sc->sc_abort_mtx);
}

static void
mfii_abort_task(struct work *wk, void *scp)
{
	struct mfii_softc *sc = scp;
	struct mfii_ccb *list;

	mutex_enter(&sc->sc_abort_mtx);
	list = SIMPLEQ_FIRST(&sc->sc_abort_list);
	SIMPLEQ_INIT(&sc->sc_abort_list);
	mutex_exit(&sc->sc_abort_mtx);

	while (list != NULL) {
		struct mfii_ccb *ccb = list;
		struct scsipi_xfer *xs = ccb->ccb_cookie;
		struct scsipi_periph *periph = xs->xs_periph;
		struct mfii_ccb *accb;

		list = SIMPLEQ_NEXT(ccb, ccb_link);

		if (!sc->sc_ld[periph->periph_target].ld_present) {
			/* device is gone */
			xs->error = XS_SELTIMEOUT;
			scsipi_done(xs);
			mfii_put_ccb(sc, ccb);
			continue;
		}

		accb = mfii_get_ccb(sc);
		mfii_scrub_ccb(accb);
		mfii_abort(sc, accb, periph->periph_target, ccb->ccb_smid,
		    MPII_SCSI_TASK_ABORT_TASK,
		    htole32(MFII_TASK_MGMT_FLAGS_PD));

		accb->ccb_cookie = ccb;
		accb->ccb_done = mfii_scsi_cmd_abort_done;

		mfii_start(sc, accb);
	}
}

static void
mfii_abort(struct mfii_softc *sc, struct mfii_ccb *accb, uint16_t dev_handle,
    uint16_t smid, uint8_t type, uint32_t flags)
{
	struct mfii_task_mgmt *msg;
	struct mpii_msg_scsi_task_request *req;

	msg = accb->ccb_request;
	req = &msg->mpii_request;
	req->dev_handle = dev_handle;
	req->function = MPII_FUNCTION_SCSI_TASK_MGMT;
	req->task_type = type;
	req->task_mid = htole16( smid);
	msg->flags = flags;

	accb->ccb_req.flags = MFII_REQ_TYPE_HI_PRI;
	accb->ccb_req.smid = le16toh(accb->ccb_smid);
}

static void
mfii_scsi_cmd_abort_done(struct mfii_softc *sc, struct mfii_ccb *accb)
{
	struct mfii_ccb *ccb = accb->ccb_cookie;
	struct scsipi_xfer *xs = ccb->ccb_cookie;

	/* XXX check accb completion? */

	mfii_put_ccb(sc, accb);
	printf("%s: cmd aborted ccb %p\n", DEVNAME(sc), ccb);

	xs->error = XS_TIMEOUT;
	scsipi_done(xs);
	mfii_put_ccb(sc, ccb);
}

static struct mfii_ccb *
mfii_get_ccb(struct mfii_softc *sc)
{
	struct mfii_ccb *ccb;

	mutex_enter(&sc->sc_ccb_mtx);
	if (!sc->sc_running) {
		ccb = NULL;
	} else {
		ccb = SIMPLEQ_FIRST(&sc->sc_ccb_freeq);
		if (ccb != NULL)
			SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_freeq, ccb_link);
	}
	mutex_exit(&sc->sc_ccb_mtx);
	return (ccb);
}

static void
mfii_scrub_ccb(struct mfii_ccb *ccb)
{
	ccb->ccb_cookie = NULL;
	ccb->ccb_done = NULL;
	ccb->ccb_flags = 0;
	ccb->ccb_data = NULL;
	ccb->ccb_direction = MFII_DATA_NONE;
	ccb->ccb_dma64 = false;
	ccb->ccb_len = 0;
	ccb->ccb_sgl_len = 0;
	memset(&ccb->ccb_req, 0, sizeof(ccb->ccb_req));
	memset(ccb->ccb_request, 0, MFII_REQUEST_SIZE);
	memset(ccb->ccb_mfi, 0, MFI_FRAME_SIZE);
}

static void
mfii_put_ccb(struct mfii_softc *sc, struct mfii_ccb *ccb)
{
	mutex_enter(&sc->sc_ccb_mtx);
	SIMPLEQ_INSERT_HEAD(&sc->sc_ccb_freeq, ccb, ccb_link);
	mutex_exit(&sc->sc_ccb_mtx);
}

static int
mfii_init_ccb(struct mfii_softc *sc)
{
	struct mfii_ccb *ccb;
	u_int8_t *request = MFII_DMA_KVA(sc->sc_requests);
	u_int8_t *mfi = MFII_DMA_KVA(sc->sc_mfi);
	u_int8_t *sense = MFII_DMA_KVA(sc->sc_sense);
	u_int8_t *sgl = MFII_DMA_KVA(sc->sc_sgl);
	u_int i;
	int error;

	sc->sc_ccb = malloc(sc->sc_max_cmds * sizeof(struct mfii_ccb),
	    M_DEVBUF, M_WAITOK|M_ZERO);

	for (i = 0; i < sc->sc_max_cmds; i++) {
		ccb = &sc->sc_ccb[i];
		ccb->ccb_sc = sc;

		/* create a dma map for transfer */
		error = bus_dmamap_create(sc->sc_dmat,
		    MAXPHYS, sc->sc_max_sgl, MAXPHYS, 0,
		    BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &ccb->ccb_dmamap32);
		if (error) {
			printf("%s: cannot create ccb dmamap32 (%d)\n",
			    DEVNAME(sc), error);
			goto destroy;
		}
		error = bus_dmamap_create(sc->sc_dmat64,
		    MAXPHYS, sc->sc_max_sgl, MAXPHYS, 0,
		    BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &ccb->ccb_dmamap64);
		if (error) {
			printf("%s: cannot create ccb dmamap64 (%d)\n",
			    DEVNAME(sc), error);
			goto destroy32;
		}

		/* select i + 1'th request. 0 is reserved for events */
		ccb->ccb_smid = i + 1;
		ccb->ccb_request_offset = MFII_REQUEST_SIZE * (i + 1);
		ccb->ccb_request = request + ccb->ccb_request_offset;
		ccb->ccb_request_dva = MFII_DMA_DVA(sc->sc_requests) +
		    ccb->ccb_request_offset;

		/* select i'th MFI command frame */
		ccb->ccb_mfi_offset = MFI_FRAME_SIZE * i;
		ccb->ccb_mfi = mfi + ccb->ccb_mfi_offset;
		ccb->ccb_mfi_dva = MFII_DMA_DVA(sc->sc_mfi) +
		    ccb->ccb_mfi_offset;

		/* select i'th sense */
		ccb->ccb_sense_offset = MFI_SENSE_SIZE * i;
		ccb->ccb_sense = (struct mfi_sense *)(sense +
		    ccb->ccb_sense_offset);
		ccb->ccb_sense_dva = MFII_DMA_DVA(sc->sc_sense) +
		    ccb->ccb_sense_offset;

		/* select i'th sgl */
		ccb->ccb_sgl_offset = sizeof(struct mfii_sge) *
		    sc->sc_max_sgl * i;
		ccb->ccb_sgl = (struct mfii_sge *)(sgl + ccb->ccb_sgl_offset);
		ccb->ccb_sgl_dva = MFII_DMA_DVA(sc->sc_sgl) +
		    ccb->ccb_sgl_offset;

		mutex_init(&ccb->ccb_mtx, MUTEX_DEFAULT, IPL_BIO);
		cv_init(&ccb->ccb_cv, "mfiiexec");

		/* add ccb to queue */
		mfii_put_ccb(sc, ccb);
	}

	return (0);

destroy32:
	bus_dmamap_destroy(sc->sc_dmat, ccb->ccb_dmamap32);
destroy:
	/* free dma maps and ccb memory */
	while ((ccb = mfii_get_ccb(sc)) != NULL) {
		bus_dmamap_destroy(sc->sc_dmat, ccb->ccb_dmamap32);
		bus_dmamap_destroy(sc->sc_dmat, ccb->ccb_dmamap64);
	}

	free(sc->sc_ccb, M_DEVBUF);

	return (1);
}

#if NBIO > 0
static int
mfii_ioctl(device_t dev, u_long cmd, void *addr)
{
	struct mfii_softc	*sc = device_private(dev);
	int error = 0;

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_ioctl ", DEVNAME(sc));

	mutex_enter(&sc->sc_lock);

	switch (cmd) {
	case BIOCINQ:
		DNPRINTF(MFII_D_IOCTL, "inq\n");
		error = mfii_ioctl_inq(sc, (struct bioc_inq *)addr);
		break;

	case BIOCVOL:
		DNPRINTF(MFII_D_IOCTL, "vol\n");
		error = mfii_ioctl_vol(sc, (struct bioc_vol *)addr);
		break;

	case BIOCDISK:
		DNPRINTF(MFII_D_IOCTL, "disk\n");
		error = mfii_ioctl_disk(sc, (struct bioc_disk *)addr);
		break;

	case BIOCALARM:
		DNPRINTF(MFII_D_IOCTL, "alarm\n");
		error = mfii_ioctl_alarm(sc, (struct bioc_alarm *)addr);
		break;

	case BIOCBLINK:
		DNPRINTF(MFII_D_IOCTL, "blink\n");
		error = mfii_ioctl_blink(sc, (struct bioc_blink *)addr);
		break;

	case BIOCSETSTATE:
		DNPRINTF(MFII_D_IOCTL, "setstate\n");
		error = mfii_ioctl_setstate(sc, (struct bioc_setstate *)addr);
		break;

#if 0
	case BIOCPATROL:
		DNPRINTF(MFII_D_IOCTL, "patrol\n");
		error = mfii_ioctl_patrol(sc, (struct bioc_patrol *)addr);
		break;
#endif

	default:
		DNPRINTF(MFII_D_IOCTL, " invalid ioctl\n");
		error = ENOTTY;
	}

	mutex_exit(&sc->sc_lock);

	return (error);
}

static int
mfii_bio_getitall(struct mfii_softc *sc)
{
	int			i, d, rv = EINVAL;
	size_t			size;
	union mfi_mbox		mbox;
	struct mfi_conf		*cfg = NULL;
	struct mfi_ld_details	*ld_det = NULL;

	/* get info */
	if (mfii_get_info(sc)) {
		DNPRINTF(MFII_D_IOCTL, "%s: mfii_get_info failed\n",
		    DEVNAME(sc));
		goto done;
	}

	/* send single element command to retrieve size for full structure */
	cfg = malloc(sizeof *cfg, M_DEVBUF, M_NOWAIT | M_ZERO);
	if (cfg == NULL)
		goto done;
	if (mfii_mgmt(sc, MR_DCMD_CONF_GET, NULL, cfg, sizeof(*cfg),
	    MFII_DATA_IN, false)) {
		free(cfg, M_DEVBUF);
		goto done;
	}

	size = cfg->mfc_size;
	free(cfg, M_DEVBUF);

	/* memory for read config */
	cfg = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
	if (cfg == NULL)
		goto done;
	if (mfii_mgmt(sc, MR_DCMD_CONF_GET, NULL, cfg, size,
	    MFII_DATA_IN, false)) {
		free(cfg, M_DEVBUF);
		goto done;
	}

	/* replace current pointer with new one */
	if (sc->sc_cfg)
		free(sc->sc_cfg, M_DEVBUF);
	sc->sc_cfg = cfg;

	/* get all ld info */
	if (mfii_mgmt(sc, MR_DCMD_LD_GET_LIST, NULL, &sc->sc_ld_list,
	    sizeof(sc->sc_ld_list), MFII_DATA_IN, false))
		goto done;

	/* get memory for all ld structures */
	size = cfg->mfc_no_ld * sizeof(struct mfi_ld_details);
	if (sc->sc_ld_sz != size) {
		if (sc->sc_ld_details)
			free(sc->sc_ld_details, M_DEVBUF);

		ld_det = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
		if (ld_det == NULL)
			goto done;
		sc->sc_ld_sz = size;
		sc->sc_ld_details = ld_det;
	}

	/* find used physical disks */
	size = sizeof(struct mfi_ld_details);
	for (i = 0, d = 0; i < cfg->mfc_no_ld; i++) {
		memset(&mbox, 0, sizeof(mbox));
		mbox.b[0] = sc->sc_ld_list.mll_list[i].mll_ld.mld_target;
		if (mfii_mgmt(sc, MR_DCMD_LD_GET_INFO, &mbox,
		    &sc->sc_ld_details[i], size, MFII_DATA_IN, false))
			goto done;

		d += sc->sc_ld_details[i].mld_cfg.mlc_parm.mpa_no_drv_per_span *
		    sc->sc_ld_details[i].mld_cfg.mlc_parm.mpa_span_depth;
	}
	sc->sc_no_pd = d;

	rv = 0;
done:
	return (rv);
}

static int
mfii_ioctl_inq(struct mfii_softc *sc, struct bioc_inq *bi)
{
	int			rv = EINVAL;
	struct mfi_conf		*cfg = NULL;

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_ioctl_inq\n", DEVNAME(sc));

	if (mfii_bio_getitall(sc)) {
		DNPRINTF(MFII_D_IOCTL, "%s: mfii_bio_getitall failed\n",
		    DEVNAME(sc));
		goto done;
	}

	/* count unused disks as volumes */
	if (sc->sc_cfg == NULL)
		goto done;
	cfg = sc->sc_cfg;

	bi->bi_nodisk = sc->sc_info.mci_pd_disks_present;
	bi->bi_novol = cfg->mfc_no_ld + cfg->mfc_no_hs;
#if notyet
	bi->bi_novol = cfg->mfc_no_ld + cfg->mfc_no_hs +
	    (bi->bi_nodisk - sc->sc_no_pd);
#endif
	/* tell bio who we are */
	strlcpy(bi->bi_dev, DEVNAME(sc), sizeof(bi->bi_dev));

	rv = 0;
done:
	return (rv);
}

static int
mfii_ioctl_vol(struct mfii_softc *sc, struct bioc_vol *bv)
{
	int			i, per, rv = EINVAL;

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_ioctl_vol %#x\n",
	    DEVNAME(sc), bv->bv_volid);

	/* we really could skip and expect that inq took care of it */
	if (mfii_bio_getitall(sc)) {
		DNPRINTF(MFII_D_IOCTL, "%s: mfii_bio_getitall failed\n",
		    DEVNAME(sc));
		goto done;
	}

	if (bv->bv_volid >= sc->sc_ld_list.mll_no_ld) {
		/* go do hotspares & unused disks */
		rv = mfii_bio_hs(sc, bv->bv_volid, MFI_MGMT_VD, bv);
		goto done;
	}

	i = bv->bv_volid;
	strlcpy(bv->bv_dev, sc->sc_ld_details[i].mld_cfg.mlc_prop.mlp_name,
	    sizeof(bv->bv_dev));

	switch (sc->sc_ld_list.mll_list[i].mll_state) {
	case MFI_LD_OFFLINE:
		bv->bv_status = BIOC_SVOFFLINE;
		break;

	case MFI_LD_PART_DEGRADED:
	case MFI_LD_DEGRADED:
		bv->bv_status = BIOC_SVDEGRADED;
		break;

	case MFI_LD_ONLINE:
		bv->bv_status = BIOC_SVONLINE;
		break;

	default:
		bv->bv_status = BIOC_SVINVALID;
		DNPRINTF(MFII_D_IOCTL, "%s: invalid logical disk state %#x\n",
		    DEVNAME(sc),
		    sc->sc_ld_list.mll_list[i].mll_state);
	}

	/* additional status can modify MFI status */
	switch (sc->sc_ld_details[i].mld_progress.mlp_in_prog) {
	case MFI_LD_PROG_CC:
		bv->bv_status = BIOC_SVSCRUB;
		per = (int)sc->sc_ld_details[i].mld_progress.mlp_cc.mp_progress;
		bv->bv_percent = (per * 100) / 0xffff;
		bv->bv_seconds =
		    sc->sc_ld_details[i].mld_progress.mlp_cc.mp_elapsed_seconds;
		break;

	case MFI_LD_PROG_BGI:
		bv->bv_status = BIOC_SVSCRUB;
		per = (int)sc->sc_ld_details[i].mld_progress.mlp_bgi.mp_progress;
		bv->bv_percent = (per * 100) / 0xffff;
		bv->bv_seconds =
		    sc->sc_ld_details[i].mld_progress.mlp_bgi.mp_elapsed_seconds;
		break;

	case MFI_LD_PROG_FGI:
	case MFI_LD_PROG_RECONSTRUCT:
		/* nothing yet */
		break;
	}

#if 0
	if (sc->sc_ld_details[i].mld_cfg.mlc_prop.mlp_cur_cache_policy & 0x01)
		bv->bv_cache = BIOC_CVWRITEBACK;
	else
		bv->bv_cache = BIOC_CVWRITETHROUGH;
#endif

	/*
	 * The RAID levels are determined per the SNIA DDF spec, this is only
	 * a subset that is valid for the MFI controller.
	 */
	bv->bv_level = sc->sc_ld_details[i].mld_cfg.mlc_parm.mpa_pri_raid;
	if (sc->sc_ld_details[i].mld_cfg.mlc_parm.mpa_span_depth > 1)
		bv->bv_level *= 10;

	bv->bv_nodisk =
	    sc->sc_ld_details[i].mld_cfg.mlc_parm.mpa_no_drv_per_span *
	    sc->sc_ld_details[i].mld_cfg.mlc_parm.mpa_span_depth;

	bv->bv_size = sc->sc_ld_details[i].mld_size * 512; /* bytes per block */
	bv->bv_stripe_size =
	    (512 << sc->sc_ld_details[i].mld_cfg.mlc_parm.mpa_stripe_size)
	    / 1024; /* in KB */

	rv = 0;
done:
	return (rv);
}

static int
mfii_ioctl_disk(struct mfii_softc *sc, struct bioc_disk *bd)
{
	struct mfi_conf		*cfg;
	struct mfi_array	*ar;
	struct mfi_ld_cfg	*ld;
	struct mfi_pd_details	*pd;
	struct mfi_pd_list	*pl;
	struct scsipi_inquiry_data *inqbuf;
	char			vend[8+16+4+1], *vendp;
	int			i, rv = EINVAL;
	int			arr, vol, disk, span;
	union mfi_mbox		mbox;

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_ioctl_disk %#x\n",
	    DEVNAME(sc), bd->bd_diskid);

	/* we really could skip and expect that inq took care of it */
	if (mfii_bio_getitall(sc)) {
		DNPRINTF(MFII_D_IOCTL, "%s: mfii_bio_getitall failed\n",
		    DEVNAME(sc));
		return (rv);
	}
	cfg = sc->sc_cfg;

	pd = malloc(sizeof *pd, M_DEVBUF, M_WAITOK);
	pl = malloc(sizeof *pl, M_DEVBUF, M_WAITOK);

	ar = cfg->mfc_array;
	vol = bd->bd_volid;
	if (vol >= cfg->mfc_no_ld) {
		/* do hotspares */
		rv = mfii_bio_hs(sc, bd->bd_volid, MFI_MGMT_SD, bd);
		goto freeme;
	}

	/* calculate offset to ld structure */
	ld = (struct mfi_ld_cfg *)(
	    ((uint8_t *)cfg) + offsetof(struct mfi_conf, mfc_array) +
	    cfg->mfc_array_size * cfg->mfc_no_array);

	/* use span 0 only when raid group is not spanned */
	if (ld[vol].mlc_parm.mpa_span_depth > 1)
		span = bd->bd_diskid / ld[vol].mlc_parm.mpa_no_drv_per_span;
	else
		span = 0;
	arr = ld[vol].mlc_span[span].mls_index;

	/* offset disk into pd list */
	disk = bd->bd_diskid % ld[vol].mlc_parm.mpa_no_drv_per_span;

	if (ar[arr].pd[disk].mar_pd.mfp_id == 0xffffU) {
		/* disk is missing but succeed command */
		bd->bd_status = BIOC_SDFAILED;
		rv = 0;

		/* try to find an unused disk for the target to rebuild */
		if (mfii_mgmt(sc, MR_DCMD_PD_GET_LIST, NULL, pl, sizeof(*pl),
		    MFII_DATA_IN, false))
			goto freeme;

		for (i = 0; i < pl->mpl_no_pd; i++) {
			if (pl->mpl_address[i].mpa_scsi_type != 0)
				continue;

			memset(&mbox, 0, sizeof(mbox));
			mbox.s[0] = pl->mpl_address[i].mpa_pd_id;
			if (mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox,
			    pd, sizeof(*pd), MFII_DATA_IN, false))
				continue;

			if (pd->mpd_fw_state == MFI_PD_UNCONFIG_GOOD ||
			    pd->mpd_fw_state == MFI_PD_UNCONFIG_BAD)
				break;
		}

		if (i == pl->mpl_no_pd)
			goto freeme;
	} else {
		memset(&mbox, 0, sizeof(mbox));
		mbox.s[0] = ar[arr].pd[disk].mar_pd.mfp_id;
		if (mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, pd, sizeof(*pd),
		    MFII_DATA_IN, false)) {
			bd->bd_status = BIOC_SDINVALID;
			goto freeme;
		}
	}

	/* get the remaining fields */
	bd->bd_channel = pd->mpd_enc_idx;
	bd->bd_target = pd->mpd_enc_slot;

	/* get status */
	switch (pd->mpd_fw_state){
	case MFI_PD_UNCONFIG_GOOD:
	case MFI_PD_UNCONFIG_BAD:
		bd->bd_status = BIOC_SDUNUSED;
		break;

	case MFI_PD_HOTSPARE: /* XXX dedicated hotspare part of array? */
		bd->bd_status = BIOC_SDHOTSPARE;
		break;

	case MFI_PD_OFFLINE:
		bd->bd_status = BIOC_SDOFFLINE;
		break;

	case MFI_PD_FAILED:
		bd->bd_status = BIOC_SDFAILED;
		break;

	case MFI_PD_REBUILD:
		bd->bd_status = BIOC_SDREBUILD;
		break;

	case MFI_PD_ONLINE:
		bd->bd_status = BIOC_SDONLINE;
		break;

	case MFI_PD_COPYBACK:
	case MFI_PD_SYSTEM:
	default:
		bd->bd_status = BIOC_SDINVALID;
		break;
	}

	bd->bd_size = pd->mpd_size * 512; /* bytes per block */

	inqbuf = (struct scsipi_inquiry_data *)&pd->mpd_inq_data;
	vendp = inqbuf->vendor;
	memcpy(vend, vendp, sizeof vend - 1);
	vend[sizeof vend - 1] = '\0';
	strlcpy(bd->bd_vendor, vend, sizeof(bd->bd_vendor));

	/* XXX find a way to retrieve serial nr from drive */
	/* XXX find a way to get bd_procdev */

#if 0
	mfp = &pd->mpd_progress;
	if (mfp->mfp_in_prog & MFI_PD_PROG_PR) {
		mp = &mfp->mfp_patrol_read;
		bd->bd_patrol.bdp_percent = (mp->mp_progress * 100) / 0xffff;
		bd->bd_patrol.bdp_seconds = mp->mp_elapsed_seconds;
	}
#endif

	rv = 0;
freeme:
	free(pd, M_DEVBUF);
	free(pl, M_DEVBUF);

	return (rv);
}

static int
mfii_ioctl_alarm(struct mfii_softc *sc, struct bioc_alarm *ba)
{
	uint32_t		opc;
	int			rv = 0;
	int8_t			ret;
	mfii_direction_t dir = MFII_DATA_NONE;

	switch (ba->ba_opcode) {
	case BIOC_SADISABLE:
		opc = MR_DCMD_SPEAKER_DISABLE;
		break;

	case BIOC_SAENABLE:
		opc = MR_DCMD_SPEAKER_ENABLE;
		break;

	case BIOC_SASILENCE:
		opc = MR_DCMD_SPEAKER_SILENCE;
		break;

	case BIOC_GASTATUS:
		opc = MR_DCMD_SPEAKER_GET;
		dir = MFII_DATA_IN;
		break;

	case BIOC_SATEST:
		opc = MR_DCMD_SPEAKER_TEST;
		break;

	default:
		DNPRINTF(MFII_D_IOCTL,
		    "%s: mfii_ioctl_alarm biocalarm invalid opcode %x\n",
		    DEVNAME(sc), ba->ba_opcode);
		return (EINVAL);
	}

	if (mfii_mgmt(sc, opc, NULL, &ret, sizeof(ret), dir, false))
		rv = EINVAL;
	else
		if (ba->ba_opcode == BIOC_GASTATUS)
			ba->ba_status = ret;
		else
			ba->ba_status = 0;

	return (rv);
}

static int
mfii_ioctl_blink(struct mfii_softc *sc, struct bioc_blink *bb)
{
	int			i, found, rv = EINVAL;
	union mfi_mbox		mbox;
	uint32_t		cmd;
	struct mfi_pd_list	*pd;

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_ioctl_blink %x\n", DEVNAME(sc),
	    bb->bb_status);

	/* channel 0 means not in an enclosure so can't be blinked */
	if (bb->bb_channel == 0)
		return (EINVAL);

	pd = malloc(sizeof(*pd), M_DEVBUF, M_WAITOK);

	if (mfii_mgmt(sc, MR_DCMD_PD_GET_LIST, NULL, pd, sizeof(*pd),
	    MFII_DATA_IN, false))
		goto done;

	for (i = 0, found = 0; i < pd->mpl_no_pd; i++)
		if (bb->bb_channel == pd->mpl_address[i].mpa_enc_index &&
		    bb->bb_target == pd->mpl_address[i].mpa_enc_slot) {
			found = 1;
			break;
		}

	if (!found)
		goto done;

	memset(&mbox, 0, sizeof(mbox));
	mbox.s[0] = pd->mpl_address[i].mpa_pd_id;

	switch (bb->bb_status) {
	case BIOC_SBUNBLINK:
		cmd = MR_DCMD_PD_UNBLINK;
		break;

	case BIOC_SBBLINK:
		cmd = MR_DCMD_PD_BLINK;
		break;

	case BIOC_SBALARM:
	default:
		DNPRINTF(MFII_D_IOCTL,
		    "%s: mfii_ioctl_blink biocblink invalid opcode %x\n",
		    DEVNAME(sc), bb->bb_status);
		goto done;
	}


	if (mfii_mgmt(sc, cmd, &mbox, NULL, 0, MFII_DATA_NONE, false))
		goto done;

	rv = 0;
done:
	free(pd, M_DEVBUF);
	return (rv);
}

static int
mfii_makegood(struct mfii_softc *sc, uint16_t pd_id)
{
	struct mfii_foreign_scan_info *fsi;
	struct mfi_pd_details	*pd;
	union mfi_mbox		mbox;
	int			rv;

	fsi = malloc(sizeof *fsi, M_DEVBUF, M_WAITOK);
	pd = malloc(sizeof *pd, M_DEVBUF, M_WAITOK);

	memset(&mbox, 0, sizeof mbox);
	mbox.s[0] = pd_id;
	rv = mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, pd, sizeof(*pd),
	    MFII_DATA_IN, false);
	if (rv != 0)
		goto done;

	if (pd->mpd_fw_state == MFI_PD_UNCONFIG_BAD) {
		mbox.s[0] = pd_id;
		mbox.s[1] = pd->mpd_pd.mfp_seq;
		mbox.b[4] = MFI_PD_UNCONFIG_GOOD;
		rv = mfii_mgmt(sc, MR_DCMD_PD_SET_STATE, &mbox, NULL, 0,
		    MFII_DATA_NONE, false);
		if (rv != 0)
			goto done;
	}

	memset(&mbox, 0, sizeof mbox);
	mbox.s[0] = pd_id;
	rv = mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, pd, sizeof(*pd),
	    MFII_DATA_IN, false);
	if (rv != 0)
		goto done;

	if (pd->mpd_ddf_state & MFI_DDF_FOREIGN) {
		rv = mfii_mgmt(sc, MR_DCMD_CFG_FOREIGN_SCAN, NULL,
		    fsi, sizeof(*fsi), MFII_DATA_IN, false);
		if (rv != 0)
			goto done;

		if (fsi->count > 0) {
			rv = mfii_mgmt(sc, MR_DCMD_CFG_FOREIGN_CLEAR, NULL,
			    NULL, 0, MFII_DATA_NONE, false);
			if (rv != 0)
				goto done;
		}
	}

	memset(&mbox, 0, sizeof mbox);
	mbox.s[0] = pd_id;
	rv = mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, pd, sizeof(*pd),
	    MFII_DATA_IN, false);
	if (rv != 0)
		goto done;

	if (pd->mpd_fw_state != MFI_PD_UNCONFIG_GOOD ||
	    pd->mpd_ddf_state & MFI_DDF_FOREIGN)
		rv = ENXIO;

done:
	free(fsi, M_DEVBUF);
	free(pd, M_DEVBUF);

	return (rv);
}

static int
mfii_makespare(struct mfii_softc *sc, uint16_t pd_id)
{
	struct mfi_hotspare	*hs;
	struct mfi_pd_details	*pd;
	union mfi_mbox		mbox;
	size_t			size;
	int			rv = EINVAL;

	/* we really could skip and expect that inq took care of it */
	if (mfii_bio_getitall(sc)) {
		DNPRINTF(MFII_D_IOCTL, "%s: mfii_bio_getitall failed\n",
		    DEVNAME(sc));
		return (rv);
	}
	size = sizeof *hs + sizeof(uint16_t) * sc->sc_cfg->mfc_no_array;

	hs = malloc(size, M_DEVBUF, M_WAITOK);
	pd = malloc(sizeof *pd, M_DEVBUF, M_WAITOK);

	memset(&mbox, 0, sizeof mbox);
	mbox.s[0] = pd_id;
	rv = mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, pd, sizeof(*pd),
	    MFII_DATA_IN, false);
	if (rv != 0)
		goto done;

	memset(hs, 0, size);
	hs->mhs_pd.mfp_id = pd->mpd_pd.mfp_id;
	hs->mhs_pd.mfp_seq = pd->mpd_pd.mfp_seq;
	rv = mfii_mgmt(sc, MR_DCMD_CFG_MAKE_SPARE, NULL, hs, size,
	    MFII_DATA_OUT, false);

done:
	free(hs, M_DEVBUF);
	free(pd, M_DEVBUF);

	return (rv);
}

static int
mfii_ioctl_setstate(struct mfii_softc *sc, struct bioc_setstate *bs)
{
	struct mfi_pd_details	*pd;
	struct mfi_pd_list	*pl;
	int			i, found, rv = EINVAL;
	union mfi_mbox		mbox;

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_ioctl_setstate %x\n", DEVNAME(sc),
	    bs->bs_status);

	pd = malloc(sizeof *pd, M_DEVBUF, M_WAITOK);
	pl = malloc(sizeof *pl, M_DEVBUF, M_WAITOK);

	if (mfii_mgmt(sc, MR_DCMD_PD_GET_LIST, NULL, pl, sizeof(*pl),
	    MFII_DATA_IN, false))
		goto done;

	for (i = 0, found = 0; i < pl->mpl_no_pd; i++)
		if (bs->bs_channel == pl->mpl_address[i].mpa_enc_index &&
		    bs->bs_target == pl->mpl_address[i].mpa_enc_slot) {
			found = 1;
			break;
		}

	if (!found)
		goto done;

	memset(&mbox, 0, sizeof(mbox));
	mbox.s[0] = pl->mpl_address[i].mpa_pd_id;

	if (mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, pd, sizeof(*pd),
	    MFII_DATA_IN, false))
		goto done;

	mbox.s[0] = pl->mpl_address[i].mpa_pd_id;
	mbox.s[1] = pd->mpd_pd.mfp_seq;

	switch (bs->bs_status) {
	case BIOC_SSONLINE:
		mbox.b[4] = MFI_PD_ONLINE;
		break;

	case BIOC_SSOFFLINE:
		mbox.b[4] = MFI_PD_OFFLINE;
		break;

	case BIOC_SSHOTSPARE:
		mbox.b[4] = MFI_PD_HOTSPARE;
		break;

	case BIOC_SSREBUILD:
		if (pd->mpd_fw_state != MFI_PD_OFFLINE) {
			if ((rv = mfii_makegood(sc,
			    pl->mpl_address[i].mpa_pd_id)))
				goto done;

			if ((rv = mfii_makespare(sc,
			    pl->mpl_address[i].mpa_pd_id)))
				goto done;

			memset(&mbox, 0, sizeof(mbox));
			mbox.s[0] = pl->mpl_address[i].mpa_pd_id;
			rv = mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox,
			    pd, sizeof(*pd), MFII_DATA_IN, false);
			if (rv != 0)
				goto done;

			/* rebuilding might be started by mfii_makespare() */
			if (pd->mpd_fw_state == MFI_PD_REBUILD) {
				rv = 0;
				goto done;
			}

			mbox.s[0] = pl->mpl_address[i].mpa_pd_id;
			mbox.s[1] = pd->mpd_pd.mfp_seq;
		}
		mbox.b[4] = MFI_PD_REBUILD;
		break;

	default:
		DNPRINTF(MFII_D_IOCTL, "%s: mfii_ioctl_setstate invalid "
		    "opcode %x\n", DEVNAME(sc), bs->bs_status);
		goto done;
	}


	rv = mfii_mgmt(sc, MR_DCMD_PD_SET_STATE, &mbox, NULL, 0,
	    MFII_DATA_NONE, false);
done:
	free(pd, M_DEVBUF);
	free(pl, M_DEVBUF);
	return (rv);
}

#if 0
int
mfii_ioctl_patrol(struct mfii_softc *sc, struct bioc_patrol *bp)
{
	uint32_t		opc;
	int			rv = 0;
	struct mfi_pr_properties prop;
	struct mfi_pr_status	status;
	uint32_t		time, exec_freq;

	switch (bp->bp_opcode) {
	case BIOC_SPSTOP:
	case BIOC_SPSTART:
		if (bp->bp_opcode == BIOC_SPSTART)
			opc = MR_DCMD_PR_START;
		else
			opc = MR_DCMD_PR_STOP;
		if (mfii_mgmt(sc, opc, NULL, NULL, 0, MFII_DATA_IN, false))
			return (EINVAL);
		break;

	case BIOC_SPMANUAL:
	case BIOC_SPDISABLE:
	case BIOC_SPAUTO:
		/* Get device's time. */
		opc = MR_DCMD_TIME_SECS_GET;
		if (mfii_mgmt(sc, opc, NULL, &time, sizeof(time),
		    MFII_DATA_IN, false))
			return (EINVAL);

		opc = MR_DCMD_PR_GET_PROPERTIES;
		if (mfii_mgmt(sc, opc, NULL, &prop, sizeof(prop),
		    MFII_DATA_IN, false))
			return (EINVAL);

		switch (bp->bp_opcode) {
		case BIOC_SPMANUAL:
			prop.op_mode = MFI_PR_OPMODE_MANUAL;
			break;
		case BIOC_SPDISABLE:
			prop.op_mode = MFI_PR_OPMODE_DISABLED;
			break;
		case BIOC_SPAUTO:
			if (bp->bp_autoival != 0) {
				if (bp->bp_autoival == -1)
					/* continuously */
					exec_freq = 0xffffffffU;
				else if (bp->bp_autoival > 0)
					exec_freq = bp->bp_autoival;
				else
					return (EINVAL);
				prop.exec_freq = exec_freq;
			}
			if (bp->bp_autonext != 0) {
				if (bp->bp_autonext < 0)
					return (EINVAL);
				else
					prop.next_exec =
					    time + bp->bp_autonext;
			}
			prop.op_mode = MFI_PR_OPMODE_AUTO;
			break;
		}

		opc = MR_DCMD_PR_SET_PROPERTIES;
		if (mfii_mgmt(sc, opc, NULL, &prop, sizeof(prop),
		    MFII_DATA_OUT, false))
			return (EINVAL);

		break;

	case BIOC_GPSTATUS:
		opc = MR_DCMD_PR_GET_PROPERTIES;
		if (mfii_mgmt(sc, opc, NULL, &prop, sizeof(prop),
		    MFII_DATA_IN, false))
			return (EINVAL);

		opc = MR_DCMD_PR_GET_STATUS;
		if (mfii_mgmt(sc, opc, NULL, &status, sizeof(status),
		    MFII_DATA_IN, false))
			return (EINVAL);

		/* Get device's time. */
		opc = MR_DCMD_TIME_SECS_GET;
		if (mfii_mgmt(sc, opc, NULL, &time, sizeof(time),
		    MFII_DATA_IN, false))
			return (EINVAL);

		switch (prop.op_mode) {
		case MFI_PR_OPMODE_AUTO:
			bp->bp_mode = BIOC_SPMAUTO;
			bp->bp_autoival = prop.exec_freq;
			bp->bp_autonext = prop.next_exec;
			bp->bp_autonow = time;
			break;
		case MFI_PR_OPMODE_MANUAL:
			bp->bp_mode = BIOC_SPMMANUAL;
			break;
		case MFI_PR_OPMODE_DISABLED:
			bp->bp_mode = BIOC_SPMDISABLED;
			break;
		default:
			printf("%s: unknown patrol mode %d\n",
			    DEVNAME(sc), prop.op_mode);
			break;
		}

		switch (status.state) {
		case MFI_PR_STATE_STOPPED:
			bp->bp_status = BIOC_SPSSTOPPED;
			break;
		case MFI_PR_STATE_READY:
			bp->bp_status = BIOC_SPSREADY;
			break;
		case MFI_PR_STATE_ACTIVE:
			bp->bp_status = BIOC_SPSACTIVE;
			break;
		case MFI_PR_STATE_ABORTED:
			bp->bp_status = BIOC_SPSABORTED;
			break;
		default:
			printf("%s: unknown patrol state %d\n",
			    DEVNAME(sc), status.state);
			break;
		}

		break;

	default:
		DNPRINTF(MFII_D_IOCTL,
		    "%s: mfii_ioctl_patrol biocpatrol invalid opcode %x\n",
		    DEVNAME(sc), bp->bp_opcode);
		return (EINVAL);
	}

	return (rv);
}
#endif

static int
mfii_bio_hs(struct mfii_softc *sc, int volid, int type, void *bio_hs)
{
	struct mfi_conf		*cfg;
	struct mfi_hotspare	*hs;
	struct mfi_pd_details	*pd;
	struct bioc_disk	*sdhs;
	struct bioc_vol		*vdhs;
	struct scsipi_inquiry_data *inqbuf;
	char			vend[8+16+4+1], *vendp;
	int			i, rv = EINVAL;
	uint32_t		size;
	union mfi_mbox		mbox;

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_vol_hs %d\n", DEVNAME(sc), volid);

	if (!bio_hs)
		return (EINVAL);

	pd = malloc(sizeof *pd, M_DEVBUF, M_WAITOK);

	/* send single element command to retrieve size for full structure */
	cfg = malloc(sizeof *cfg, M_DEVBUF, M_WAITOK);
	if (mfii_mgmt(sc, MR_DCMD_CONF_GET, NULL, cfg, sizeof(*cfg),
	    MFII_DATA_IN, false))
		goto freeme;

	size = cfg->mfc_size;
	free(cfg, M_DEVBUF);

	/* memory for read config */
	cfg = malloc(size, M_DEVBUF, M_WAITOK|M_ZERO);
	if (mfii_mgmt(sc, MR_DCMD_CONF_GET, NULL, cfg, size,
	    MFII_DATA_IN, false))
		goto freeme;

	/* calculate offset to hs structure */
	hs = (struct mfi_hotspare *)(
	    ((uint8_t *)cfg) + offsetof(struct mfi_conf, mfc_array) +
	    cfg->mfc_array_size * cfg->mfc_no_array +
	    cfg->mfc_ld_size * cfg->mfc_no_ld);

	if (volid < cfg->mfc_no_ld)
		goto freeme; /* not a hotspare */

	if (volid > (cfg->mfc_no_ld + cfg->mfc_no_hs))
		goto freeme; /* not a hotspare */

	/* offset into hotspare structure */
	i = volid - cfg->mfc_no_ld;

	DNPRINTF(MFII_D_IOCTL,
	    "%s: mfii_vol_hs i %d volid %d no_ld %d no_hs %d "
	    "hs %p cfg %p id %02x\n", DEVNAME(sc), i, volid, cfg->mfc_no_ld,
	    cfg->mfc_no_hs, hs, cfg, hs[i].mhs_pd.mfp_id);

	/* get pd fields */
	memset(&mbox, 0, sizeof(mbox));
	mbox.s[0] = hs[i].mhs_pd.mfp_id;
	if (mfii_mgmt(sc, MR_DCMD_PD_GET_INFO, &mbox, pd, sizeof(*pd),
	    MFII_DATA_IN, false)) {
		DNPRINTF(MFII_D_IOCTL, "%s: mfii_vol_hs illegal PD\n",
		    DEVNAME(sc));
		goto freeme;
	}

	switch (type) {
	case MFI_MGMT_VD:
		vdhs = bio_hs;
		vdhs->bv_status = BIOC_SVONLINE;
		vdhs->bv_size = pd->mpd_size / 2 * 1024; /* XXX why? */
		vdhs->bv_level = -1; /* hotspare */
		vdhs->bv_nodisk = 1;
		break;

	case MFI_MGMT_SD:
		sdhs = bio_hs;
		sdhs->bd_status = BIOC_SDHOTSPARE;
		sdhs->bd_size = pd->mpd_size / 2 * 1024; /* XXX why? */
		sdhs->bd_channel = pd->mpd_enc_idx;
		sdhs->bd_target = pd->mpd_enc_slot;
		inqbuf = (struct scsipi_inquiry_data *)&pd->mpd_inq_data;
		vendp = inqbuf->vendor;
		memcpy(vend, vendp, sizeof vend - 1);
		vend[sizeof vend - 1] = '\0';
		strlcpy(sdhs->bd_vendor, vend, sizeof(sdhs->bd_vendor));
		break;

	default:
		goto freeme;
	}

	DNPRINTF(MFII_D_IOCTL, "%s: mfii_vol_hs 6\n", DEVNAME(sc));
	rv = 0;
freeme:
	free(pd, M_DEVBUF);
	free(cfg, M_DEVBUF);

	return (rv);
}

#endif /* NBIO > 0 */

#define MFI_BBU_SENSORS 4

static void
mfii_bbu(struct mfii_softc *sc, envsys_data_t *edata)
{
	struct mfi_bbu_status bbu;
	u_int32_t status;
	u_int32_t mask;
	u_int32_t soh_bad;
	int rv;

	mutex_enter(&sc->sc_lock);
	rv = mfii_mgmt(sc, MR_DCMD_BBU_GET_STATUS, NULL, &bbu,
	    sizeof(bbu), MFII_DATA_IN, false);
	mutex_exit(&sc->sc_lock);
	if (rv != 0) {
		edata->state = ENVSYS_SINVALID;
		edata->value_cur = 0;
		return;
	}

	switch (bbu.battery_type) {
	case MFI_BBU_TYPE_IBBU:
	case MFI_BBU_TYPE_IBBU09:
	case MFI_BBU_TYPE_CVPM02:
		mask = MFI_BBU_STATE_BAD_IBBU;
		soh_bad = 0;
		break;
	case MFI_BBU_TYPE_BBU:
		mask = MFI_BBU_STATE_BAD_BBU;
		soh_bad = (bbu.detail.bbu.is_SOH_good == 0);
		break;

	case MFI_BBU_TYPE_NONE:
	default:
		edata->state = ENVSYS_SCRITICAL;
		edata->value_cur = 0;
		return;
	}

	status = le32toh(bbu.fw_status) & mask;
	switch (edata->sensor) {
	case 0:
		edata->value_cur = (status || soh_bad) ? 0 : 1;
		edata->state =
		    edata->value_cur ? ENVSYS_SVALID : ENVSYS_SCRITICAL;
		return;
	case 1:
		edata->value_cur = le16toh(bbu.voltage) * 1000;
		edata->state = ENVSYS_SVALID;
		return;
	case 2:
		edata->value_cur = (int16_t)le16toh(bbu.current) * 1000;
		edata->state = ENVSYS_SVALID;
		return;
	case 3:
		edata->value_cur =
		    le16toh(bbu.temperature) * 1000000 + 273150000;
		edata->state = ENVSYS_SVALID;
		return;
	}
}

static void
mfii_refresh_ld_sensor(struct mfii_softc *sc, envsys_data_t *edata)
{
	struct bioc_vol bv;
	int error;

	memset(&bv, 0, sizeof(bv));
	bv.bv_volid = edata->sensor - MFI_BBU_SENSORS;
	mutex_enter(&sc->sc_lock);
	error = mfii_ioctl_vol(sc, &bv);
	mutex_exit(&sc->sc_lock);
	if (error)
		bv.bv_status = BIOC_SVINVALID;
	bio_vol_to_envsys(edata, &bv);
}

static void
mfii_init_ld_sensor(struct mfii_softc *sc, envsys_data_t *sensor, int i)
{
	sensor->units = ENVSYS_DRIVE;
	sensor->state = ENVSYS_SINVALID;
	sensor->value_cur = ENVSYS_DRIVE_EMPTY;
	/* Enable monitoring for drive state changes */
	sensor->flags |= ENVSYS_FMONSTCHANGED;
	snprintf(sensor->desc, sizeof(sensor->desc), "%s:%d", DEVNAME(sc), i);
}

static void
mfii_attach_sensor(struct mfii_softc *sc, envsys_data_t *s)
{
	if (sysmon_envsys_sensor_attach(sc->sc_sme, s))
		aprint_error_dev(sc->sc_dev,
		    "failed to attach sensor %s\n", s->desc);
}

static int
mfii_create_sensors(struct mfii_softc *sc)
{
	int i, rv;
	const int nsensors = MFI_BBU_SENSORS + MFI_MAX_LD;

	sc->sc_sme = sysmon_envsys_create();
	sc->sc_sensors = malloc(sizeof(envsys_data_t) * nsensors,
	    M_DEVBUF, M_NOWAIT | M_ZERO);

	if (sc->sc_sensors == NULL) {
		aprint_error_dev(sc->sc_dev, "can't allocate envsys_data_t\n");
		return ENOMEM;
	}
	/* BBU */
	sc->sc_sensors[0].units = ENVSYS_INDICATOR;
	sc->sc_sensors[0].state = ENVSYS_SINVALID;
	sc->sc_sensors[0].value_cur = 0;
	sc->sc_sensors[1].units = ENVSYS_SVOLTS_DC;
	sc->sc_sensors[1].state = ENVSYS_SINVALID;
	sc->sc_sensors[1].value_cur = 0;
	sc->sc_sensors[2].units = ENVSYS_SAMPS;
	sc->sc_sensors[2].state = ENVSYS_SINVALID;
	sc->sc_sensors[2].value_cur = 0;
	sc->sc_sensors[3].units = ENVSYS_STEMP;
	sc->sc_sensors[3].state = ENVSYS_SINVALID;
	sc->sc_sensors[3].value_cur = 0;

	if (ISSET(le32toh(sc->sc_info.mci_hw_present), MFI_INFO_HW_BBU)) {
		sc->sc_bbuok = true;
		sc->sc_sensors[0].flags |= ENVSYS_FMONCRITICAL;
		snprintf(sc->sc_sensors[0].desc, sizeof(sc->sc_sensors[0].desc),
		    "%s BBU state", DEVNAME(sc));
		snprintf(sc->sc_sensors[1].desc, sizeof(sc->sc_sensors[1].desc),
		    "%s BBU voltage", DEVNAME(sc));
		snprintf(sc->sc_sensors[2].desc, sizeof(sc->sc_sensors[2].desc),
		    "%s BBU current", DEVNAME(sc));
		snprintf(sc->sc_sensors[3].desc, sizeof(sc->sc_sensors[3].desc),
		    "%s BBU temperature", DEVNAME(sc));
		for (i = 0; i < MFI_BBU_SENSORS; i++) {
			mfii_attach_sensor(sc, &sc->sc_sensors[i]);
		}
	}

	for (i = 0; i < sc->sc_ld_list.mll_no_ld; i++) {
		mfii_init_ld_sensor(sc, &sc->sc_sensors[i + MFI_BBU_SENSORS], i);
		mfii_attach_sensor(sc, &sc->sc_sensors[i + MFI_BBU_SENSORS]);
	}

	sc->sc_sme->sme_name = DEVNAME(sc);
	sc->sc_sme->sme_cookie = sc;
	sc->sc_sme->sme_refresh = mfii_refresh_sensor;
	rv = sysmon_envsys_register(sc->sc_sme);
	if (rv) {
		aprint_error_dev(sc->sc_dev,
		    "unable to register with sysmon (rv = %d)\n", rv);
		sysmon_envsys_destroy(sc->sc_sme);
		sc->sc_sme = NULL;
	}
	return rv;

}

static int
mfii_destroy_sensors(struct mfii_softc *sc)
{
	if (sc->sc_sme == NULL)
		return 0;
	sysmon_envsys_unregister(sc->sc_sme);
	sc->sc_sme = NULL;
	free(sc->sc_sensors, M_DEVBUF);
	return 0;
}

static void
mfii_refresh_sensor(struct sysmon_envsys *sme, envsys_data_t *edata)
{
	struct mfii_softc	*sc = sme->sme_cookie;

	if (edata->sensor >= MFI_BBU_SENSORS + MFI_MAX_LD)
		return;

	if (edata->sensor < MFI_BBU_SENSORS) {
		if (sc->sc_bbuok)
			mfii_bbu(sc, edata);
	} else {
		mfii_refresh_ld_sensor(sc, edata);
	}
}