/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2008 Yahoo!, Inc.
 * All rights reserved.
 * Written by: John Baldwin <jhb@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Avago Technologies (LSI) MPT-Fusion Host Adapter FreeBSD userland interface
 */
/*-
 * Copyright (c) 2011-2015 LSI Corp.
 * Copyright (c) 2013-2015 Avago Technologies
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Avago Technologies (LSI) MPT-Fusion Host Adapter FreeBSD
 */

/* TODO Move headers to mpsvar */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/selinfo.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/bio.h>
#include <sys/abi_compat.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/sysctl.h>
#include <sys/ioccom.h>
#include <sys/endian.h>
#include <sys/queue.h>
#include <sys/kthread.h>
#include <sys/taskqueue.h>
#include <sys/proc.h>
#include <sys/sysent.h>

#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>

#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/scsi/scsi_all.h>

#include <dev/mps/mpi/mpi2_type.h>
#include <dev/mps/mpi/mpi2.h>
#include <dev/mps/mpi/mpi2_ioc.h>
#include <dev/mps/mpi/mpi2_cnfg.h>
#include <dev/mps/mpi/mpi2_init.h>
#include <dev/mps/mpi/mpi2_tool.h>
#include <dev/mps/mps_ioctl.h>
#include <dev/mps/mpsvar.h>
#include <dev/mps/mps_table.h>
#include <dev/mps/mps_sas.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>

static d_open_t         mps_open;
static d_close_t        mps_close;
static d_ioctl_t        mps_ioctl_devsw;

static struct cdevsw mps_cdevsw = {
        .d_version =    D_VERSION,
        .d_flags =      0,
        .d_open =       mps_open,
        .d_close =      mps_close,
        .d_ioctl =      mps_ioctl_devsw,
        .d_name =       "mps",
};

typedef int (mps_user_f)(struct mps_command *, struct mps_usr_command *);
static mps_user_f       mpi_pre_ioc_facts;
static mps_user_f       mpi_pre_port_facts;
static mps_user_f       mpi_pre_fw_download;
static mps_user_f       mpi_pre_fw_upload;
static mps_user_f       mpi_pre_sata_passthrough;
static mps_user_f       mpi_pre_smp_passthrough;
static mps_user_f       mpi_pre_config;
static mps_user_f       mpi_pre_sas_io_unit_control;

static int mps_user_read_cfg_header(struct mps_softc *,
                                    struct mps_cfg_page_req *);
static int mps_user_read_cfg_page(struct mps_softc *,
                                  struct mps_cfg_page_req *, void *);
static int mps_user_read_extcfg_header(struct mps_softc *,
                                     struct mps_ext_cfg_page_req *);
static int mps_user_read_extcfg_page(struct mps_softc *,
                                     struct mps_ext_cfg_page_req *, void *);
static int mps_user_write_cfg_page(struct mps_softc *,
                                   struct mps_cfg_page_req *, void *);
static int mps_user_setup_request(struct mps_command *,
                                  struct mps_usr_command *);
static int mps_user_command(struct mps_softc *, struct mps_usr_command *);

static int mps_user_pass_thru(struct mps_softc *sc, mps_pass_thru_t *data);
static void mps_user_get_adapter_data(struct mps_softc *sc,
    mps_adapter_data_t *data);
static void mps_user_read_pci_info(struct mps_softc *sc,
    mps_pci_info_t *data);
static uint8_t mps_get_fw_diag_buffer_number(struct mps_softc *sc,
    uint32_t unique_id);
static int mps_post_fw_diag_buffer(struct mps_softc *sc,
    mps_fw_diagnostic_buffer_t *pBuffer, uint32_t *return_code);
static int mps_release_fw_diag_buffer(struct mps_softc *sc,
    mps_fw_diagnostic_buffer_t *pBuffer, uint32_t *return_code,
    uint32_t diag_type);
static int mps_diag_register(struct mps_softc *sc,
    mps_fw_diag_register_t *diag_register, uint32_t *return_code);
static int mps_diag_unregister(struct mps_softc *sc,
    mps_fw_diag_unregister_t *diag_unregister, uint32_t *return_code);
static int mps_diag_query(struct mps_softc *sc, mps_fw_diag_query_t *diag_query,
    uint32_t *return_code);
static int mps_diag_read_buffer(struct mps_softc *sc,
    mps_diag_read_buffer_t *diag_read_buffer, uint8_t *ioctl_buf,
    uint32_t *return_code);
static int mps_diag_release(struct mps_softc *sc,
    mps_fw_diag_release_t *diag_release, uint32_t *return_code);
static int mps_do_diag_action(struct mps_softc *sc, uint32_t action,
    uint8_t *diag_action, uint32_t length, uint32_t *return_code);
static int mps_user_diag_action(struct mps_softc *sc, mps_diag_action_t *data);
static void mps_user_event_query(struct mps_softc *sc, mps_event_query_t *data);
static void mps_user_event_enable(struct mps_softc *sc,
    mps_event_enable_t *data);
static int mps_user_event_report(struct mps_softc *sc,
    mps_event_report_t *data);
static int mps_user_reg_access(struct mps_softc *sc, mps_reg_access_t *data);
static int mps_user_btdh(struct mps_softc *sc, mps_btdh_mapping_t *data);

MALLOC_DEFINE(M_MPSUSER, "mps_user", "Buffers for mps(4) ioctls");

int
mps_attach_user(struct mps_softc *sc)
{
        int unit;

        unit = device_get_unit(sc->mps_dev);
        sc->mps_cdev = make_dev(&mps_cdevsw, unit, UID_ROOT, GID_OPERATOR, 0640,
            "mps%d", unit);
        if (sc->mps_cdev == NULL) {
                return (ENOMEM);
        }
        sc->mps_cdev->si_drv1 = sc;
        return (0);
}

void
mps_detach_user(struct mps_softc *sc)
{

        /* XXX: do a purge of pending requests? */
        if (sc->mps_cdev != NULL)
                destroy_dev(sc->mps_cdev);
}

static int
mps_open(struct cdev *dev, int flags, int fmt, struct thread *td)
{

        return (0);
}

static int
mps_close(struct cdev *dev, int flags, int fmt, struct thread *td)
{

        return (0);
}

static int
mps_user_read_cfg_header(struct mps_softc *sc,
    struct mps_cfg_page_req *page_req)
{
        MPI2_CONFIG_PAGE_HEADER *hdr;
        struct mps_config_params params;
        int         error;

        hdr = &params.hdr.Struct;
        params.action = MPI2_CONFIG_ACTION_PAGE_HEADER;
        params.page_address = le32toh(page_req->page_address);
        hdr->PageVersion = 0;
        hdr->PageLength = 0;
        hdr->PageNumber = page_req->header.PageNumber;
        hdr->PageType = page_req->header.PageType;
        params.buffer = NULL;
        params.length = 0;
        params.callback = NULL;

        if ((error = mps_read_config_page(sc, &params)) != 0) {
                /*
                 * Leave the request. Without resetting the chip, it's
                 * still owned by it and we'll just get into trouble
                 * freeing it now. Mark it as abandoned so that if it
                 * shows up later it can be freed.
                 */
                mps_printf(sc, "read_cfg_header timed out\n");
                return (ETIMEDOUT);
        }

        page_req->ioc_status = htole16(params.status);
        if ((page_req->ioc_status & MPI2_IOCSTATUS_MASK) ==
            MPI2_IOCSTATUS_SUCCESS) {
                bcopy(hdr, &page_req->header, sizeof(page_req->header));
        }

        return (0);
}

static int
mps_user_read_cfg_page(struct mps_softc *sc, struct mps_cfg_page_req *page_req,
    void *buf)
{
        MPI2_CONFIG_PAGE_HEADER *reqhdr, *hdr;
        struct mps_config_params params;
        int           error;

        reqhdr = buf;
        hdr = &params.hdr.Struct;
        hdr->PageVersion = reqhdr->PageVersion;
        hdr->PageLength = reqhdr->PageLength;
        hdr->PageNumber = reqhdr->PageNumber;
        hdr->PageType = reqhdr->PageType & MPI2_CONFIG_PAGETYPE_MASK;
        params.action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
        params.page_address = le32toh(page_req->page_address);
        params.buffer = buf;
        params.length = le32toh(page_req->len);
        params.callback = NULL;

        if ((error = mps_read_config_page(sc, &params)) != 0) {
                mps_printf(sc, "mps_user_read_cfg_page timed out\n");
                return (ETIMEDOUT);
        }

        page_req->ioc_status = htole16(params.status);
        return (0);
}

static int
mps_user_read_extcfg_header(struct mps_softc *sc,
    struct mps_ext_cfg_page_req *ext_page_req)
{
        MPI2_CONFIG_EXTENDED_PAGE_HEADER *hdr;
        struct mps_config_params params;
        int         error;

        hdr = &params.hdr.Ext;
        params.action = MPI2_CONFIG_ACTION_PAGE_HEADER;
        hdr->PageVersion = ext_page_req->header.PageVersion;
        hdr->PageType = MPI2_CONFIG_PAGETYPE_EXTENDED;
        hdr->ExtPageLength = 0;
        hdr->PageNumber = ext_page_req->header.PageNumber;
        hdr->ExtPageType = ext_page_req->header.ExtPageType;
        params.page_address = le32toh(ext_page_req->page_address);
        params.buffer = NULL;
        params.length = 0;
        params.callback = NULL;

        if ((error = mps_read_config_page(sc, &params)) != 0) {
                /*
                 * Leave the request. Without resetting the chip, it's
                 * still owned by it and we'll just get into trouble
                 * freeing it now. Mark it as abandoned so that if it
                 * shows up later it can be freed.
                 */
                mps_printf(sc, "mps_user_read_extcfg_header timed out\n");
                return (ETIMEDOUT);
        }

        ext_page_req->ioc_status = htole16(params.status);
        if ((ext_page_req->ioc_status & MPI2_IOCSTATUS_MASK) ==
            MPI2_IOCSTATUS_SUCCESS) {
                ext_page_req->header.PageVersion = hdr->PageVersion;
                ext_page_req->header.PageNumber = hdr->PageNumber;
                ext_page_req->header.PageType = hdr->PageType;
                ext_page_req->header.ExtPageLength = hdr->ExtPageLength;
                ext_page_req->header.ExtPageType = hdr->ExtPageType;
        }

        return (0);
}

static int
mps_user_read_extcfg_page(struct mps_softc *sc,
    struct mps_ext_cfg_page_req *ext_page_req, void *buf)
{
        MPI2_CONFIG_EXTENDED_PAGE_HEADER *reqhdr, *hdr;
        struct mps_config_params params;
        int error;

        reqhdr = buf;
        hdr = &params.hdr.Ext;
        params.action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
        params.page_address = le32toh(ext_page_req->page_address);
        hdr->PageVersion = reqhdr->PageVersion;
        hdr->PageType = MPI2_CONFIG_PAGETYPE_EXTENDED;
        hdr->PageNumber = reqhdr->PageNumber;
        hdr->ExtPageType = reqhdr->ExtPageType;
        hdr->ExtPageLength = reqhdr->ExtPageLength;
        params.buffer = buf;
        params.length = le32toh(ext_page_req->len);
        params.callback = NULL;

        if ((error = mps_read_config_page(sc, &params)) != 0) {
                mps_printf(sc, "mps_user_read_extcfg_page timed out\n");
                return (ETIMEDOUT);
        }

        ext_page_req->ioc_status = htole16(params.status);
        return (0);
}

static int
mps_user_write_cfg_page(struct mps_softc *sc,
    struct mps_cfg_page_req *page_req, void *buf)
{
        MPI2_CONFIG_PAGE_HEADER *reqhdr, *hdr;
        struct mps_config_params params;
        u_int         hdr_attr;
        int           error;

        reqhdr = buf;
        hdr = &params.hdr.Struct;
        hdr_attr = reqhdr->PageType & MPI2_CONFIG_PAGEATTR_MASK;
        if (hdr_attr != MPI2_CONFIG_PAGEATTR_CHANGEABLE &&
            hdr_attr != MPI2_CONFIG_PAGEATTR_PERSISTENT) {
                mps_printf(sc, "page type 0x%x not changeable\n",
                        reqhdr->PageType & MPI2_CONFIG_PAGETYPE_MASK);
                return (EINVAL);
        }

        /*
         * There isn't any point in restoring stripped out attributes
         * if you then mask them going down to issue the request.
         */

        hdr->PageVersion = reqhdr->PageVersion;
        hdr->PageLength = reqhdr->PageLength;
        hdr->PageNumber = reqhdr->PageNumber;
        hdr->PageType = reqhdr->PageType;
        params.action = MPI2_CONFIG_ACTION_PAGE_WRITE_CURRENT;
        params.page_address = le32toh(page_req->page_address);
        params.buffer = buf;
        params.length = le32toh(page_req->len);
        params.callback = NULL;

        if ((error = mps_write_config_page(sc, &params)) != 0) {
                mps_printf(sc, "mps_write_cfg_page timed out\n");
                return (ETIMEDOUT);
        }

        page_req->ioc_status = htole16(params.status);
        return (0);
}

void
mpi_init_sge(struct mps_command *cm, void *req, void *sge)
{
        int off, space;

        space = (int)cm->cm_sc->reqframesz;
        off = (uintptr_t)sge - (uintptr_t)req;

        KASSERT(off < space, ("bad pointers %p %p, off %d, space %d",
            req, sge, off, space));

        cm->cm_sge = sge;
        cm->cm_sglsize = space - off;
}

/*
 * Prepare the mps_command for an IOC_FACTS request.
 */
static int
mpi_pre_ioc_facts(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_IOC_FACTS_REQUEST *req = (void *)cm->cm_req;
        MPI2_IOC_FACTS_REPLY *rpl;

        if (cmd->req_len != sizeof *req)
                return (EINVAL);
        if (cmd->rpl_len != sizeof *rpl)
                return (EINVAL);

        cm->cm_sge = NULL;
        cm->cm_sglsize = 0;
        return (0);
}

/*
 * Prepare the mps_command for a PORT_FACTS request.
 */
static int
mpi_pre_port_facts(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_PORT_FACTS_REQUEST *req = (void *)cm->cm_req;
        MPI2_PORT_FACTS_REPLY *rpl;

        if (cmd->req_len != sizeof *req)
                return (EINVAL);
        if (cmd->rpl_len != sizeof *rpl)
                return (EINVAL);

        cm->cm_sge = NULL;
        cm->cm_sglsize = 0;
        return (0);
}

/*
 * Prepare the mps_command for a FW_DOWNLOAD request.
 */
static int
mpi_pre_fw_download(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_FW_DOWNLOAD_REQUEST *req = (void *)cm->cm_req;
        MPI2_FW_DOWNLOAD_REPLY *rpl;
        MPI2_FW_DOWNLOAD_TCSGE tc;
        int error;

        if (cmd->req_len != sizeof *req)
                return (EINVAL);
        if (cmd->rpl_len != sizeof *rpl)
                return (EINVAL);

        if (cmd->len == 0)
                return (EINVAL);

        error = copyin(cmd->buf, cm->cm_data, cmd->len);
        if (error != 0)
                return (error);

        mpi_init_sge(cm, req, &req->SGL);
        bzero(&tc, sizeof tc);

        /*
         * For now, the F/W image must be provided in a single request.
         */
        if ((req->MsgFlags & MPI2_FW_DOWNLOAD_MSGFLGS_LAST_SEGMENT) == 0)
                return (EINVAL);
        if (req->TotalImageSize != cmd->len)
                return (EINVAL);

        /*
         * The value of the first two elements is specified in the
         * Fusion-MPT Message Passing Interface document.
         */
        tc.ContextSize = 0;
        tc.DetailsLength = 12;
        tc.ImageOffset = 0;
        tc.ImageSize = cmd->len;

        cm->cm_flags |= MPS_CM_FLAGS_DATAOUT;

        return (mps_push_sge(cm, &tc, sizeof tc, 0));
}

/*
 * Prepare the mps_command for a FW_UPLOAD request.
 */
static int
mpi_pre_fw_upload(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_FW_UPLOAD_REQUEST *req = (void *)cm->cm_req;
        MPI2_FW_UPLOAD_REPLY *rpl;
        MPI2_FW_UPLOAD_TCSGE tc;

        if (cmd->req_len != sizeof *req)
                return (EINVAL);
        if (cmd->rpl_len != sizeof *rpl)
                return (EINVAL);

        mpi_init_sge(cm, req, &req->SGL);
        bzero(&tc, sizeof tc);

        /*
         * The value of the first two elements is specified in the
         * Fusion-MPT Message Passing Interface document.
         */
        tc.ContextSize = 0;
        tc.DetailsLength = 12;
        /*
         * XXX Is there any reason to fetch a partial image?  I.e. to
         * set ImageOffset to something other than 0?
         */
        tc.ImageOffset = 0;
        tc.ImageSize = cmd->len;

        cm->cm_flags |= MPS_CM_FLAGS_DATAIN;

        return (mps_push_sge(cm, &tc, sizeof tc, 0));
}

/*
 * Prepare the mps_command for a SATA_PASSTHROUGH request.
 */
static int
mpi_pre_sata_passthrough(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_SATA_PASSTHROUGH_REQUEST *req = (void *)cm->cm_req;
        MPI2_SATA_PASSTHROUGH_REPLY *rpl;

        if (cmd->req_len != sizeof *req)
                return (EINVAL);
        if (cmd->rpl_len != sizeof *rpl)
                return (EINVAL);

        mpi_init_sge(cm, req, &req->SGL);
        return (0);
}

/*
 * Prepare the mps_command for a SMP_PASSTHROUGH request.
 */
static int
mpi_pre_smp_passthrough(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_SMP_PASSTHROUGH_REQUEST *req = (void *)cm->cm_req;
        MPI2_SMP_PASSTHROUGH_REPLY *rpl;

        if (cmd->req_len != sizeof *req)
                return (EINVAL);
        if (cmd->rpl_len != sizeof *rpl)
                return (EINVAL);

        mpi_init_sge(cm, req, &req->SGL);
        return (0);
}

/*
 * Prepare the mps_command for a CONFIG request.
 */
static int
mpi_pre_config(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_CONFIG_REQUEST *req = (void *)cm->cm_req;
        MPI2_CONFIG_REPLY *rpl;

        if (cmd->req_len != sizeof *req)
                return (EINVAL);
        if (cmd->rpl_len != sizeof *rpl)
                return (EINVAL);

        mpi_init_sge(cm, req, &req->PageBufferSGE);
        return (0);
}

/*
 * Prepare the mps_command for a SAS_IO_UNIT_CONTROL request.
 */
static int
mpi_pre_sas_io_unit_control(struct mps_command *cm,
                             struct mps_usr_command *cmd)
{

        cm->cm_sge = NULL;
        cm->cm_sglsize = 0;
        return (0);
}

/*
 * A set of functions to prepare an mps_command for the various
 * supported requests.
 */
struct mps_user_func {
        U8              Function;
        mps_user_f      *f_pre;
} mps_user_func_list[] = {
        { MPI2_FUNCTION_IOC_FACTS,              mpi_pre_ioc_facts },
        { MPI2_FUNCTION_PORT_FACTS,             mpi_pre_port_facts },
        { MPI2_FUNCTION_FW_DOWNLOAD,            mpi_pre_fw_download },
        { MPI2_FUNCTION_FW_UPLOAD,              mpi_pre_fw_upload },
        { MPI2_FUNCTION_SATA_PASSTHROUGH,       mpi_pre_sata_passthrough },
        { MPI2_FUNCTION_SMP_PASSTHROUGH,        mpi_pre_smp_passthrough},
        { MPI2_FUNCTION_CONFIG,                 mpi_pre_config},
        { MPI2_FUNCTION_SAS_IO_UNIT_CONTROL,    mpi_pre_sas_io_unit_control },
        { 0xFF,                                 NULL } /* list end */
};

static int
mps_user_setup_request(struct mps_command *cm, struct mps_usr_command *cmd)
{
        MPI2_REQUEST_HEADER *hdr = (MPI2_REQUEST_HEADER *)cm->cm_req;   
        struct mps_user_func *f;

        for (f = mps_user_func_list; f->f_pre != NULL; f++) {
                if (hdr->Function == f->Function)
                        return (f->f_pre(cm, cmd));
        }
        return (EINVAL);
}       

static int
mps_user_command(struct mps_softc *sc, struct mps_usr_command *cmd)
{
        MPI2_REQUEST_HEADER *hdr;       
        MPI2_DEFAULT_REPLY *rpl;
        void *buf = NULL;
        struct mps_command *cm = NULL;
        int err = 0;
        int sz;

        mps_lock(sc);
        cm = mps_alloc_command(sc);

        if (cm == NULL) {
                mps_printf(sc, "%s: no mps requests\n", __func__);
                err = ENOMEM;
                goto RetFree;
        }
        mps_unlock(sc);

        hdr = (MPI2_REQUEST_HEADER *)cm->cm_req;

        mps_dprint(sc, MPS_USER, "%s: req %p %d  rpl %p %d\n", __func__,
            cmd->req, cmd->req_len, cmd->rpl, cmd->rpl_len);

        if (cmd->req_len > sc->reqframesz) {
                err = EINVAL;
                goto RetFreeUnlocked;
        }
        err = copyin(cmd->req, hdr, cmd->req_len);
        if (err != 0)
                goto RetFreeUnlocked;

        mps_dprint(sc, MPS_USER, "%s: Function %02X MsgFlags %02X\n", __func__,
            hdr->Function, hdr->MsgFlags);

        if (cmd->len > 0) {
                buf = malloc(cmd->len, M_MPSUSER, M_WAITOK|M_ZERO);
                cm->cm_data = buf;
                cm->cm_length = cmd->len;
        } else {
                cm->cm_data = NULL;
                cm->cm_length = 0;
        }

        cm->cm_flags = MPS_CM_FLAGS_SGE_SIMPLE;
        cm->cm_desc.Default.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;

        err = mps_user_setup_request(cm, cmd);
        if (err == EINVAL) {
                mps_printf(sc, "%s: unsupported parameter or unsupported "
                    "function in request (function = 0x%X)\n", __func__,
                    hdr->Function);
        }
        if (err != 0)
                goto RetFreeUnlocked;

        mps_lock(sc);
        err = mps_wait_command(sc, &cm, 60, CAN_SLEEP);

        if (err || (cm == NULL)) {
                mps_printf(sc, "%s: invalid request: error %d\n",
                    __func__, err);
                goto RetFree;
        }

        rpl = (MPI2_DEFAULT_REPLY *)cm->cm_reply;
        if (rpl != NULL)
                sz = rpl->MsgLength * 4;
        else
                sz = 0;

        if (sz > cmd->rpl_len) {
                mps_printf(sc, "%s: user reply buffer (%d) smaller than "
                    "returned buffer (%d)\n", __func__, cmd->rpl_len, sz);
                sz = cmd->rpl_len;
        }       

        mps_unlock(sc);
        err = copyout(rpl, cmd->rpl, sz);
        if (buf != NULL && err == 0)
                err = copyout(buf, cmd->buf, cmd->len);
        mps_dprint(sc, MPS_USER, "%s: reply size %d\n", __func__, sz);

RetFreeUnlocked:
        mps_lock(sc);
RetFree:
        if (cm != NULL)
                mps_free_command(sc, cm);
        mps_unlock(sc);
        if (buf != NULL)
                free(buf, M_MPSUSER);
        return (err);
}

static int
mps_user_pass_thru(struct mps_softc *sc, mps_pass_thru_t *data)
{
        MPI2_REQUEST_HEADER     *hdr, *tmphdr;
        MPI2_DEFAULT_REPLY      *rpl = NULL;
        struct mps_command      *cm = NULL;
        void                    *req = NULL;
        int                     err = 0, dir = 0, sz;
        uint8_t                 function = 0;
        u_int                   sense_len;
        struct mpssas_target    *targ = NULL;

        /*
         * Only allow one passthru command at a time.  Use the MPS_FLAGS_BUSY
         * bit to denote that a passthru is being processed.
         */
        mps_lock(sc);
        if (sc->mps_flags & MPS_FLAGS_BUSY) {
                mps_dprint(sc, MPS_USER, "%s: Only one passthru command "
                    "allowed at a single time.", __func__);
                mps_unlock(sc);
                return (EBUSY);
        }
        sc->mps_flags |= MPS_FLAGS_BUSY;
        mps_unlock(sc);

        /*
         * Do some validation on data direction.  Valid cases are:
         *    1) DataSize is 0 and direction is NONE
         *    2) DataSize is non-zero and one of:
         *        a) direction is READ or
         *        b) direction is WRITE or
         *        c) direction is BOTH and DataOutSize is non-zero
         * If valid and the direction is BOTH, change the direction to READ.
         * if valid and the direction is not BOTH, make sure DataOutSize is 0.
         */
        if (((data->DataSize == 0) &&
            (data->DataDirection == MPS_PASS_THRU_DIRECTION_NONE)) ||
            ((data->DataSize != 0) &&
            ((data->DataDirection == MPS_PASS_THRU_DIRECTION_READ) ||
            (data->DataDirection == MPS_PASS_THRU_DIRECTION_WRITE) ||
            ((data->DataDirection == MPS_PASS_THRU_DIRECTION_BOTH) &&
            (data->DataOutSize != 0))))) {
                if (data->DataDirection == MPS_PASS_THRU_DIRECTION_BOTH)
                        data->DataDirection = MPS_PASS_THRU_DIRECTION_READ;
                else
                        data->DataOutSize = 0;
        } else {
                err = EINVAL;
                goto RetFreeUnlocked;
        }

        mps_dprint(sc, MPS_USER, "%s: req 0x%jx %d  rpl 0x%jx %d "
            "data in 0x%jx %d data out 0x%jx %d data dir %d\n", __func__,
            data->PtrRequest, data->RequestSize, data->PtrReply,
            data->ReplySize, data->PtrData, data->DataSize,
            data->PtrDataOut, data->DataOutSize, data->DataDirection);

        if (data->RequestSize > sc->reqframesz) {
                err = EINVAL;
                goto RetFreeUnlocked;
        }

        req = malloc(data->RequestSize, M_MPSUSER, M_WAITOK | M_ZERO);
        tmphdr = (MPI2_REQUEST_HEADER *)req;

        err = copyin(PTRIN(data->PtrRequest), req, data->RequestSize);
        if (err != 0)
                goto RetFreeUnlocked;

        function = tmphdr->Function;
        mps_dprint(sc, MPS_USER, "%s: Function %02X MsgFlags %02X\n", __func__,
            function, tmphdr->MsgFlags);

        /*
         * Handle a passthru TM request.
         */
        if (function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
                MPI2_SCSI_TASK_MANAGE_REQUEST   *task;

                mps_lock(sc);
                cm = mpssas_alloc_tm(sc);
                if (cm == NULL) {
                        err = EINVAL;
                        goto Ret;
                }

                /* Copy the header in.  Only a small fixup is needed. */
                task = (MPI2_SCSI_TASK_MANAGE_REQUEST *)cm->cm_req;
                memcpy(task, req, data->RequestSize);
                task->TaskMID = cm->cm_desc.Default.SMID;

                cm->cm_data = NULL;
                cm->cm_complete = NULL;
                cm->cm_complete_data = NULL;

                targ = mpssas_find_target_by_handle(sc->sassc, 0,
                    task->DevHandle);
                if (targ == NULL) {
                        mps_dprint(sc, MPS_INFO,
                           "%s %d : invalid handle for requested TM 0x%x \n",
                           __func__, __LINE__, task->DevHandle);
                        err = 1;
                } else {
                        mpssas_prepare_for_tm(sc, cm, targ, CAM_LUN_WILDCARD);
                        err = mps_wait_command(sc, &cm, 30, CAN_SLEEP);
                }

                if (err != 0) {
                        err = EIO;
                        mps_dprint(sc, MPS_FAULT, "%s: task management failed",
                            __func__);
                }
                /*
                 * Copy the reply data and sense data to user space.
                 */
                if (err == 0 && cm != NULL && cm->cm_reply != NULL) {
                        rpl = (MPI2_DEFAULT_REPLY *)cm->cm_reply;
                        sz = rpl->MsgLength * 4;

                        if (bootverbose && sz > data->ReplySize) {
                                mps_printf(sc, "%s: user reply buffer (%d) "
                                    "smaller than returned buffer (%d)\n",
                                    __func__, data->ReplySize, sz);
                        }
                        mps_unlock(sc);
                        err = copyout(cm->cm_reply, PTRIN(data->PtrReply),
                            MIN(sz, data->ReplySize));
                        if (err != 0)
                                mps_dprint(sc, MPS_FAULT,
                                    "%s: copyout failed\n", __func__);
                        mps_lock(sc);
                }
                mpssas_free_tm(sc, cm);
                goto Ret;
        }

        mps_lock(sc);
        cm = mps_alloc_command(sc);
        if (cm == NULL) {
                mps_printf(sc, "%s: no mps requests\n", __func__);
                err = ENOMEM;
                goto Ret;
        }
        mps_unlock(sc);

        hdr = (MPI2_REQUEST_HEADER *)cm->cm_req;
        memcpy(hdr, req, data->RequestSize);

        /*
         * Do some checking to make sure the IOCTL request contains a valid
         * request.  Then set the SGL info.
         */
        mpi_init_sge(cm, hdr, (void *)((uint8_t *)hdr + data->RequestSize));

        /*
         * Set up for read, write or both.  From check above, DataOutSize will
         * be 0 if direction is READ or WRITE, but it will have some non-zero
         * value if the direction is BOTH.  So, just use the biggest size to get
         * the cm_data buffer size.  If direction is BOTH, 2 SGLs need to be set
         * up; the first is for the request and the second will contain the
         * response data. cm_out_len needs to be set here and this will be used
         * when the SGLs are set up.
         */
        cm->cm_data = NULL;
        cm->cm_length = MAX(data->DataSize, data->DataOutSize);
        cm->cm_out_len = data->DataOutSize;
        cm->cm_flags = 0;
        if (cm->cm_length != 0) {
                cm->cm_data = malloc(cm->cm_length, M_MPSUSER, M_WAITOK |
                    M_ZERO);
                cm->cm_flags = MPS_CM_FLAGS_DATAIN;
                if (data->DataOutSize) {
                        cm->cm_flags |= MPS_CM_FLAGS_DATAOUT;
                        err = copyin(PTRIN(data->PtrDataOut),
                            cm->cm_data, data->DataOutSize);
                } else if (data->DataDirection ==
                    MPS_PASS_THRU_DIRECTION_WRITE) {
                        cm->cm_flags = MPS_CM_FLAGS_DATAOUT;
                        err = copyin(PTRIN(data->PtrData),
                            cm->cm_data, data->DataSize);
                }
                if (err != 0)
                        mps_dprint(sc, MPS_FAULT, "%s: failed to copy "
                            "IOCTL data from user space\n", __func__);
        }
        cm->cm_flags |= MPS_CM_FLAGS_SGE_SIMPLE;
        cm->cm_desc.Default.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;

        /*
         * Set up Sense buffer and SGL offset for IO passthru.  SCSI IO request
         * uses SCSI IO descriptor.
         */
        if ((function == MPI2_FUNCTION_SCSI_IO_REQUEST) ||
            (function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) {
                MPI2_SCSI_IO_REQUEST    *scsi_io_req;

                scsi_io_req = (MPI2_SCSI_IO_REQUEST *)hdr;
                /*
                 * Put SGE for data and data_out buffer at the end of
                 * scsi_io_request message header (64 bytes in total).
                 * Following above SGEs, the residual space will be used by
                 * sense data.
                 */
                scsi_io_req->SenseBufferLength = (uint8_t)(data->RequestSize -
                    64);
                scsi_io_req->SenseBufferLowAddress = htole32(cm->cm_sense_busaddr);

                /*
                 * Set SGLOffset0 value.  This is the number of dwords that SGL
                 * is offset from the beginning of MPI2_SCSI_IO_REQUEST struct.
                 */
                scsi_io_req->SGLOffset0 = 24;

                /*
                 * Setup descriptor info.  RAID passthrough must use the
                 * default request descriptor which is already set, so if this
                 * is a SCSI IO request, change the descriptor to SCSI IO.
                 * Also, if this is a SCSI IO request, handle the reply in the
                 * mpssas_scsio_complete function.
                 */
                if (function == MPI2_FUNCTION_SCSI_IO_REQUEST) {
                        cm->cm_desc.SCSIIO.RequestFlags =
                            MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO;
                        cm->cm_desc.SCSIIO.DevHandle = scsi_io_req->DevHandle;

                        /*
                         * Make sure the DevHandle is not 0 because this is a
                         * likely error.
                         */
                        if (scsi_io_req->DevHandle == 0) {
                                err = EINVAL;
                                goto RetFreeUnlocked;
                        }
                }
        }

        mps_lock(sc);

        err = mps_wait_command(sc, &cm, 30, CAN_SLEEP);

        if (err || (cm == NULL)) {
                mps_printf(sc, "%s: invalid request: error %d\n", __func__,
                    err);
                mps_unlock(sc);
                goto RetFreeUnlocked;
        }

        /*
         * Sync the DMA data, if any.  Then copy the data to user space.
         */
        if (cm->cm_data != NULL) {
                if (cm->cm_flags & MPS_CM_FLAGS_DATAIN)
                        dir = BUS_DMASYNC_POSTREAD;
                else if (cm->cm_flags & MPS_CM_FLAGS_DATAOUT)
                        dir = BUS_DMASYNC_POSTWRITE;
                bus_dmamap_sync(sc->buffer_dmat, cm->cm_dmamap, dir);
                bus_dmamap_unload(sc->buffer_dmat, cm->cm_dmamap);

                if (cm->cm_flags & MPS_CM_FLAGS_DATAIN) {
                        mps_unlock(sc);
                        err = copyout(cm->cm_data,
                            PTRIN(data->PtrData), data->DataSize);
                        mps_lock(sc);
                        if (err != 0)
                                mps_dprint(sc, MPS_FAULT, "%s: failed to copy "
                                    "IOCTL data to user space\n", __func__);
                }
        }

        /*
         * Copy the reply data and sense data to user space.
         */
        if (err == 0 && cm->cm_reply != NULL) {
                rpl = (MPI2_DEFAULT_REPLY *)cm->cm_reply;
                sz = rpl->MsgLength * 4;

                if (bootverbose && sz > data->ReplySize) {
                        mps_printf(sc, "%s: user reply buffer (%d) smaller "
                            "than returned buffer (%d)\n", __func__,
                            data->ReplySize, sz);
                }
                mps_unlock(sc);
                err = copyout(cm->cm_reply, PTRIN(data->PtrReply),
                    MIN(sz, data->ReplySize));
                mps_lock(sc);
                if (err != 0)
                        mps_dprint(sc, MPS_FAULT, "%s: failed to copy "
                            "IOCTL data to user space\n", __func__);

                if (err == 0 &&
                    (function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
                    function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) {
                        if (((MPI2_SCSI_IO_REPLY *)rpl)->SCSIState &
                            MPI2_SCSI_STATE_AUTOSENSE_VALID) {
                                sense_len =
                                    MIN((le32toh(((MPI2_SCSI_IO_REPLY *)rpl)->
                                    SenseCount)), sizeof(struct
                                    scsi_sense_data));
                                mps_unlock(sc);
                                err = copyout(cm->cm_sense, (PTRIN(data->PtrReply +
                                    sizeof(MPI2_SCSI_IO_REPLY))), sense_len);
                                mps_lock(sc);
                                if (err != 0)
                                        mps_dprint(sc, MPS_FAULT,
                                            "%s: failed to copy IOCTL data to "
                                            "user space\n", __func__);
                        }
                }
        }
        mps_unlock(sc);

RetFreeUnlocked:
        mps_lock(sc);

        if (cm != NULL) {
                if (cm->cm_data)
                        free(cm->cm_data, M_MPSUSER);
                mps_free_command(sc, cm);
        }
Ret:
        sc->mps_flags &= ~MPS_FLAGS_BUSY;
        mps_unlock(sc);
        free(req, M_MPSUSER);

        return (err);
}

static void
mps_user_get_adapter_data(struct mps_softc *sc, mps_adapter_data_t *data)
{
        Mpi2ConfigReply_t       mpi_reply;
        Mpi2BiosPage3_t         config_page;

        /*
         * Use the PCI interface functions to get the Bus, Device, and Function
         * information.
         */
        data->PciInformation.u.bits.BusNumber = pci_get_bus(sc->mps_dev);
        data->PciInformation.u.bits.DeviceNumber = pci_get_slot(sc->mps_dev);
        data->PciInformation.u.bits.FunctionNumber =
            pci_get_function(sc->mps_dev);

        /*
         * Get the FW version that should already be saved in IOC Facts.
         */
        data->MpiFirmwareVersion = sc->facts->FWVersion.Word;

        /*
         * General device info.
         */
        data->AdapterType = MPSIOCTL_ADAPTER_TYPE_SAS2;
        if (sc->mps_flags & MPS_FLAGS_WD_AVAILABLE)
                data->AdapterType = MPSIOCTL_ADAPTER_TYPE_SAS2_SSS6200;
        data->PCIDeviceHwId = pci_get_device(sc->mps_dev);
        data->PCIDeviceHwRev = pci_read_config(sc->mps_dev, PCIR_REVID, 1);
        data->SubSystemId = pci_get_subdevice(sc->mps_dev);
        data->SubsystemVendorId = pci_get_subvendor(sc->mps_dev);

        /*
         * Get the driver version.
         */
        strcpy((char *)&data->DriverVersion[0], MPS_DRIVER_VERSION);

        /*
         * Need to get BIOS Config Page 3 for the BIOS Version.
         */
        data->BiosVersion = 0;
        mps_lock(sc);
        if (mps_config_get_bios_pg3(sc, &mpi_reply, &config_page))
                printf("%s: Error while retrieving BIOS Version\n", __func__);
        else
                data->BiosVersion = config_page.BiosVersion;
        mps_unlock(sc);
}

static void
mps_user_read_pci_info(struct mps_softc *sc, mps_pci_info_t *data)
{
        int     i;

        /*
         * Use the PCI interface functions to get the Bus, Device, and Function
         * information.
         */
        data->BusNumber = pci_get_bus(sc->mps_dev);
        data->DeviceNumber = pci_get_slot(sc->mps_dev);
        data->FunctionNumber = pci_get_function(sc->mps_dev);

        /*
         * Now get the interrupt vector and the pci header.  The vector can
         * only be 0 right now.  The header is the first 256 bytes of config
         * space.
         */
        data->InterruptVector = 0;
        for (i = 0; i < sizeof (data->PciHeader); i++) {
                data->PciHeader[i] = pci_read_config(sc->mps_dev, i, 1);
        }
}

static uint8_t
mps_get_fw_diag_buffer_number(struct mps_softc *sc, uint32_t unique_id)
{
        uint8_t index;

        for (index = 0; index < MPI2_DIAG_BUF_TYPE_COUNT; index++) {
                if (sc->fw_diag_buffer_list[index].unique_id == unique_id) {
                        return (index);
                }
        }

        return (MPS_FW_DIAGNOSTIC_UID_NOT_FOUND);
}

static int
mps_post_fw_diag_buffer(struct mps_softc *sc,
    mps_fw_diagnostic_buffer_t *pBuffer, uint32_t *return_code)
{
        MPI2_DIAG_BUFFER_POST_REQUEST   *req;
        MPI2_DIAG_BUFFER_POST_REPLY     *reply = NULL;
        struct mps_command              *cm = NULL;
        int                             i, status;

        /*
         * If buffer is not enabled, just leave.
         */
        *return_code = MPS_FW_DIAG_ERROR_POST_FAILED;
        if (!pBuffer->enabled) {
                return (MPS_DIAG_FAILURE);
        }

        /*
         * Clear some flags initially.
         */
        pBuffer->force_release = FALSE;
        pBuffer->valid_data = FALSE;
        pBuffer->owned_by_firmware = FALSE;

        /*
         * Get a command.
         */
        cm = mps_alloc_command(sc);
        if (cm == NULL) {
                mps_printf(sc, "%s: no mps requests\n", __func__);
                return (MPS_DIAG_FAILURE);
        }

        /*
         * Build the request for releasing the FW Diag Buffer and send it.
         */
        req = (MPI2_DIAG_BUFFER_POST_REQUEST *)cm->cm_req;
        req->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
        req->BufferType = pBuffer->buffer_type;
        req->ExtendedType = pBuffer->extended_type;
        req->BufferLength = pBuffer->size;
        for (i = 0; i < (sizeof(req->ProductSpecific) / 4); i++)
                req->ProductSpecific[i] = pBuffer->product_specific[i];
        mps_from_u64(sc->fw_diag_busaddr, &req->BufferAddress);
        cm->cm_data = NULL;
        cm->cm_length = 0;
        cm->cm_desc.Default.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;
        cm->cm_complete_data = NULL;

        /*
         * Send command synchronously.
         */
        status = mps_wait_command(sc, &cm, 30, CAN_SLEEP);
        if (status || (cm == NULL)) {
                mps_printf(sc, "%s: invalid request: error %d\n", __func__,
                    status);
                status = MPS_DIAG_FAILURE;
                goto done;
        }

        /*
         * Process POST reply.
         */
        reply = (MPI2_DIAG_BUFFER_POST_REPLY *)cm->cm_reply;
        if (reply == NULL) {
                mps_printf(sc, "%s: reply is NULL, probably due to "
                    "reinitialization\n", __func__);
                status = MPS_DIAG_FAILURE;
                goto done;
        }
        if ((le16toh(reply->IOCStatus) & MPI2_IOCSTATUS_MASK) !=
            MPI2_IOCSTATUS_SUCCESS) {
                status = MPS_DIAG_FAILURE;
                mps_dprint(sc, MPS_FAULT, "%s: post of FW  Diag Buffer failed "
                    "with IOCStatus = 0x%x, IOCLogInfo = 0x%x and "
                    "TransferLength = 0x%x\n", __func__,
                    le16toh(reply->IOCStatus), le32toh(reply->IOCLogInfo),
                    le32toh(reply->TransferLength));
                goto done;
        }

        /*
         * Post was successful.
         */
        pBuffer->valid_data = TRUE;
        pBuffer->owned_by_firmware = TRUE;
        *return_code = MPS_FW_DIAG_ERROR_SUCCESS;
        status = MPS_DIAG_SUCCESS;

done:
        if (cm != NULL)
                mps_free_command(sc, cm);
        return (status);
}

static int
mps_release_fw_diag_buffer(struct mps_softc *sc,
    mps_fw_diagnostic_buffer_t *pBuffer, uint32_t *return_code,
    uint32_t diag_type)
{
        MPI2_DIAG_RELEASE_REQUEST       *req;
        MPI2_DIAG_RELEASE_REPLY         *reply = NULL;
        struct mps_command              *cm = NULL;
        int                             status;

        /*
         * If buffer is not enabled, just leave.
         */
        *return_code = MPS_FW_DIAG_ERROR_RELEASE_FAILED;
        if (!pBuffer->enabled) {
                mps_dprint(sc, MPS_USER, "%s: This buffer type is not "
                    "supported by the IOC", __func__);
                return (MPS_DIAG_FAILURE);
        }

        /*
         * Clear some flags initially.
         */
        pBuffer->force_release = FALSE;
        pBuffer->valid_data = FALSE;
        pBuffer->owned_by_firmware = FALSE;

        /*
         * Get a command.
         */
        cm = mps_alloc_command(sc);
        if (cm == NULL) {
                mps_printf(sc, "%s: no mps requests\n", __func__);
                return (MPS_DIAG_FAILURE);
        }

        /*
         * Build the request for releasing the FW Diag Buffer and send it.
         */
        req = (MPI2_DIAG_RELEASE_REQUEST *)cm->cm_req;
        req->Function = MPI2_FUNCTION_DIAG_RELEASE;
        req->BufferType = pBuffer->buffer_type;
        cm->cm_data = NULL;
        cm->cm_length = 0;
        cm->cm_desc.Default.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;
        cm->cm_complete_data = NULL;

        /*
         * Send command synchronously.
         */
        status = mps_wait_command(sc, &cm, 30, CAN_SLEEP);
        if (status || (cm == NULL)) {
                mps_printf(sc, "%s: invalid request: error %d\n", __func__,
                    status);
                status = MPS_DIAG_FAILURE;
                goto done;
        }

        /*
         * Process RELEASE reply.
         */
        reply = (MPI2_DIAG_RELEASE_REPLY *)cm->cm_reply;
        if (reply == NULL) {
                mps_printf(sc, "%s: reply is NULL, probably due to "
                    "reinitialization\n", __func__);
                status = MPS_DIAG_FAILURE;
                goto done;
        }
        if (((le16toh(reply->IOCStatus) & MPI2_IOCSTATUS_MASK) !=
            MPI2_IOCSTATUS_SUCCESS) || pBuffer->owned_by_firmware) {
                status = MPS_DIAG_FAILURE;
                mps_dprint(sc, MPS_FAULT, "%s: release of FW Diag Buffer "
                    "failed with IOCStatus = 0x%x and IOCLogInfo = 0x%x\n",
                    __func__, le16toh(reply->IOCStatus),
                    le32toh(reply->IOCLogInfo));
                goto done;
        }

        /*
         * Release was successful.
         */
        *return_code = MPS_FW_DIAG_ERROR_SUCCESS;
        status = MPS_DIAG_SUCCESS;

        /*
         * If this was for an UNREGISTER diag type command, clear the unique ID.
         */
        if (diag_type == MPS_FW_DIAG_TYPE_UNREGISTER) {
                pBuffer->unique_id = MPS_FW_DIAG_INVALID_UID;
        }

done:
        if (cm != NULL)
                mps_free_command(sc, cm);

        return (status);
}

static int
mps_diag_register(struct mps_softc *sc, mps_fw_diag_register_t *diag_register,
    uint32_t *return_code)
{
        bus_dma_template_t              t;
        mps_fw_diagnostic_buffer_t      *pBuffer;
        struct mps_busdma_context       *ctx;
        uint8_t                         extended_type, buffer_type, i;
        uint32_t                        buffer_size;
        uint32_t                        unique_id;
        int                             status;
        int                             error;

        extended_type = diag_register->ExtendedType;
        buffer_type = diag_register->BufferType;
        buffer_size = diag_register->RequestedBufferSize;
        unique_id = diag_register->UniqueId;
        ctx = NULL;
        error = 0;

        /*
         * Check for valid buffer type
         */
        if (buffer_type >= MPI2_DIAG_BUF_TYPE_COUNT) {
                *return_code = MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                return (MPS_DIAG_FAILURE);
        }

        /*
         * Get the current buffer and look up the unique ID.  The unique ID
         * should not be found.  If it is, the ID is already in use.
         */
        i = mps_get_fw_diag_buffer_number(sc, unique_id);
        pBuffer = &sc->fw_diag_buffer_list[buffer_type];
        if (i != MPS_FW_DIAGNOSTIC_UID_NOT_FOUND) {
                *return_code = MPS_FW_DIAG_ERROR_INVALID_UID;
                return (MPS_DIAG_FAILURE);
        }

        /*
         * The buffer's unique ID should not be registered yet, and the given
         * unique ID cannot be 0.
         */
        if ((pBuffer->unique_id != MPS_FW_DIAG_INVALID_UID) ||
            (unique_id == MPS_FW_DIAG_INVALID_UID)) {
                *return_code = MPS_FW_DIAG_ERROR_INVALID_UID;
                return (MPS_DIAG_FAILURE);
        }

        /*
         * If this buffer is already posted as immediate, just change owner.
         */
        if (pBuffer->immediate && pBuffer->owned_by_firmware &&
            (pBuffer->unique_id == MPS_FW_DIAG_INVALID_UID)) {
                pBuffer->immediate = FALSE;
                pBuffer->unique_id = unique_id;
                return (MPS_DIAG_SUCCESS);
        }

        /*
         * Post a new buffer after checking if it's enabled.  The DMA buffer
         * that is allocated will be contiguous (nsegments = 1).
         */
        if (!pBuffer->enabled) {
                *return_code = MPS_FW_DIAG_ERROR_NO_BUFFER;
                return (MPS_DIAG_FAILURE);
        }
        bus_dma_template_init(&t, sc->mps_parent_dmat);
        BUS_DMA_TEMPLATE_FILL(&t, BD_NSEGMENTS(1), BD_MAXSIZE(buffer_size),
            BD_MAXSEGSIZE(buffer_size), BD_LOWADDR(BUS_SPACE_MAXADDR_32BIT));
        if (bus_dma_template_tag(&t, &sc->fw_diag_dmat)) {
                mps_dprint(sc, MPS_ERROR,
                    "Cannot allocate FW diag buffer DMA tag\n");
                *return_code = MPS_FW_DIAG_ERROR_NO_BUFFER;
                status = MPS_DIAG_FAILURE;
                goto bailout;
        }
        if (bus_dmamem_alloc(sc->fw_diag_dmat, (void **)&sc->fw_diag_buffer,
            BUS_DMA_NOWAIT, &sc->fw_diag_map)) {
                mps_dprint(sc, MPS_ERROR,
                    "Cannot allocate FW diag buffer memory\n");
                *return_code = MPS_FW_DIAG_ERROR_NO_BUFFER;
                status = MPS_DIAG_FAILURE;
                goto bailout;
        }
        bzero(sc->fw_diag_buffer, buffer_size);

        ctx = malloc(sizeof(*ctx), M_MPSUSER, M_WAITOK | M_ZERO);
        ctx->addr = &sc->fw_diag_busaddr;
        ctx->buffer_dmat = sc->fw_diag_dmat;
        ctx->buffer_dmamap = sc->fw_diag_map;
        ctx->softc = sc;
        error = bus_dmamap_load(sc->fw_diag_dmat, sc->fw_diag_map,
            sc->fw_diag_buffer, buffer_size, mps_memaddr_wait_cb,
            ctx, 0);

        if (error == EINPROGRESS) {
                /* XXX KDM */
                device_printf(sc->mps_dev, "%s: Deferred bus_dmamap_load\n",
                    __func__);
                /*
                 * Wait for the load to complete.  If we're interrupted,
                 * bail out.
                 */
                mps_lock(sc);
                if (ctx->completed == 0) {
                        error = msleep(ctx, &sc->mps_mtx, PCATCH, "mpswait", 0);
                        if (error != 0) {
                                /*
                                 * We got an error from msleep(9).  This is
                                 * most likely due to a signal.  Tell
                                 * mpr_memaddr_wait_cb() that we've abandoned
                                 * the context, so it needs to clean up when
                                 * it is called.
                                 */
                                ctx->abandoned = 1;

                                /* The callback will free this memory */
                                ctx = NULL;
                                mps_unlock(sc);

                                device_printf(sc->mps_dev, "Cannot "
                                    "bus_dmamap_load FW diag buffer, error = "
                                    "%d returned from msleep\n", error);
                                *return_code = MPS_FW_DIAG_ERROR_NO_BUFFER;
                                status = MPS_DIAG_FAILURE;
                                goto bailout;
                        }
                }
                mps_unlock(sc);
        } 

        if ((error != 0) || (ctx->error != 0)) {
                device_printf(sc->mps_dev, "Cannot bus_dmamap_load FW diag "
                    "buffer, %serror = %d\n", error ? "" : "callback ",
                    error ? error : ctx->error);
                *return_code = MPS_FW_DIAG_ERROR_NO_BUFFER;
                status = MPS_DIAG_FAILURE;
                goto bailout;
        }

        bus_dmamap_sync(sc->fw_diag_dmat, sc->fw_diag_map, BUS_DMASYNC_PREREAD);

        pBuffer->size = buffer_size;

        /*
         * Copy the given info to the diag buffer and post the buffer.
         */
        pBuffer->buffer_type = buffer_type;
        pBuffer->immediate = FALSE;
        if (buffer_type == MPI2_DIAG_BUF_TYPE_TRACE) {
                for (i = 0; i < (sizeof (pBuffer->product_specific) / 4);
                    i++) {
                        pBuffer->product_specific[i] =
                            diag_register->ProductSpecific[i];
                }
        }
        pBuffer->extended_type = extended_type;
        pBuffer->unique_id = unique_id;
        status = mps_post_fw_diag_buffer(sc, pBuffer, return_code);

bailout:
        /*
         * In case there was a failure, free the DMA buffer.
         */
        if (status == MPS_DIAG_FAILURE) {
                if (sc->fw_diag_busaddr != 0) {
                        bus_dmamap_unload(sc->fw_diag_dmat, sc->fw_diag_map);
                        sc->fw_diag_busaddr = 0;
                }
                if (sc->fw_diag_buffer != NULL) {
                        bus_dmamem_free(sc->fw_diag_dmat, sc->fw_diag_buffer,
                            sc->fw_diag_map);
                        sc->fw_diag_buffer = NULL;
                }
                if (sc->fw_diag_dmat != NULL) {
                        bus_dma_tag_destroy(sc->fw_diag_dmat);
                        sc->fw_diag_dmat = NULL;
                }
        }

        if (ctx != NULL)
                free(ctx, M_MPSUSER);

        return (status);
}

static int
mps_diag_unregister(struct mps_softc *sc,
    mps_fw_diag_unregister_t *diag_unregister, uint32_t *return_code)
{
        mps_fw_diagnostic_buffer_t      *pBuffer;
        uint8_t                         i;
        uint32_t                        unique_id;
        int                             status;

        unique_id = diag_unregister->UniqueId;

        /*
         * Get the current buffer and look up the unique ID.  The unique ID
         * should be there.
         */
        i = mps_get_fw_diag_buffer_number(sc, unique_id);
        if (i == MPS_FW_DIAGNOSTIC_UID_NOT_FOUND) {
                *return_code = MPS_FW_DIAG_ERROR_INVALID_UID;
                return (MPS_DIAG_FAILURE);
        }

        pBuffer = &sc->fw_diag_buffer_list[i];

        /*
         * Try to release the buffer from FW before freeing it.  If release
         * fails, don't free the DMA buffer in case FW tries to access it
         * later.  If buffer is not owned by firmware, can't release it.
         */
        if (!pBuffer->owned_by_firmware) {
                status = MPS_DIAG_SUCCESS;
        } else {
                status = mps_release_fw_diag_buffer(sc, pBuffer, return_code,
                    MPS_FW_DIAG_TYPE_UNREGISTER);
        }

        /*
         * At this point, return the current status no matter what happens with
         * the DMA buffer.
         */
        pBuffer->unique_id = MPS_FW_DIAG_INVALID_UID;
        if (status == MPS_DIAG_SUCCESS) {
                if (sc->fw_diag_busaddr != 0) {
                        bus_dmamap_unload(sc->fw_diag_dmat, sc->fw_diag_map);
                        sc->fw_diag_busaddr = 0;
                }
                if (sc->fw_diag_buffer != NULL) {
                        bus_dmamem_free(sc->fw_diag_dmat, sc->fw_diag_buffer,
                            sc->fw_diag_map);
                        sc->fw_diag_buffer = NULL;
                }
                if (sc->fw_diag_dmat != NULL) {
                        bus_dma_tag_destroy(sc->fw_diag_dmat);
                        sc->fw_diag_dmat = NULL;
                }
        }

        return (status);
}

static int
mps_diag_query(struct mps_softc *sc, mps_fw_diag_query_t *diag_query,
    uint32_t *return_code)
{
        mps_fw_diagnostic_buffer_t      *pBuffer;
        uint8_t                         i;
        uint32_t                        unique_id;

        unique_id = diag_query->UniqueId;

        /*
         * If ID is valid, query on ID.
         * If ID is invalid, query on buffer type.
         */
        if (unique_id == MPS_FW_DIAG_INVALID_UID) {
                i = diag_query->BufferType;
                if (i >= MPI2_DIAG_BUF_TYPE_COUNT) {
                        *return_code = MPS_FW_DIAG_ERROR_INVALID_UID;
                        return (MPS_DIAG_FAILURE);
                }
        } else {
                i = mps_get_fw_diag_buffer_number(sc, unique_id);
                if (i == MPS_FW_DIAGNOSTIC_UID_NOT_FOUND) {
                        *return_code = MPS_FW_DIAG_ERROR_INVALID_UID;
                        return (MPS_DIAG_FAILURE);
                }
        }

        /*
         * Fill query structure with the diag buffer info.
         */
        pBuffer = &sc->fw_diag_buffer_list[i];
        diag_query->BufferType = pBuffer->buffer_type;
        diag_query->ExtendedType = pBuffer->extended_type;
        if (diag_query->BufferType == MPI2_DIAG_BUF_TYPE_TRACE) {
                for (i = 0; i < (sizeof(diag_query->ProductSpecific) / 4);
                    i++) {
                        diag_query->ProductSpecific[i] =
                            pBuffer->product_specific[i];
                }
        }
        diag_query->TotalBufferSize = pBuffer->size;
        diag_query->DriverAddedBufferSize = 0;
        diag_query->UniqueId = pBuffer->unique_id;
        diag_query->ApplicationFlags = 0;
        diag_query->DiagnosticFlags = 0;

        /*
         * Set/Clear application flags
         */
        if (pBuffer->immediate) {
                diag_query->ApplicationFlags &= ~MPS_FW_DIAG_FLAG_APP_OWNED;
        } else {
                diag_query->ApplicationFlags |= MPS_FW_DIAG_FLAG_APP_OWNED;
        }
        if (pBuffer->valid_data || pBuffer->owned_by_firmware) {
                diag_query->ApplicationFlags |= MPS_FW_DIAG_FLAG_BUFFER_VALID;
        } else {
                diag_query->ApplicationFlags &= ~MPS_FW_DIAG_FLAG_BUFFER_VALID;
        }
        if (pBuffer->owned_by_firmware) {
                diag_query->ApplicationFlags |=
                    MPS_FW_DIAG_FLAG_FW_BUFFER_ACCESS;
        } else {
                diag_query->ApplicationFlags &=
                    ~MPS_FW_DIAG_FLAG_FW_BUFFER_ACCESS;
        }

        return (MPS_DIAG_SUCCESS);
}

static int
mps_diag_read_buffer(struct mps_softc *sc,
    mps_diag_read_buffer_t *diag_read_buffer, uint8_t *ioctl_buf,
    uint32_t *return_code)
{
        mps_fw_diagnostic_buffer_t      *pBuffer;
        uint8_t                         i, *pData;
        uint32_t                        unique_id;
        int                             status;

        unique_id = diag_read_buffer->UniqueId;

        /*
         * Get the current buffer and look up the unique ID.  The unique ID
         * should be there.
         */
        i = mps_get_fw_diag_buffer_number(sc, unique_id);
        if (i == MPS_FW_DIAGNOSTIC_UID_NOT_FOUND) {
                *return_code = MPS_FW_DIAG_ERROR_INVALID_UID;
                return (MPS_DIAG_FAILURE);
        }

        pBuffer = &sc->fw_diag_buffer_list[i];

        /*
         * Make sure requested read is within limits
         */
        if (diag_read_buffer->StartingOffset + diag_read_buffer->BytesToRead >
            pBuffer->size) {
                *return_code = MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                return (MPS_DIAG_FAILURE);
        }

        /* Sync the DMA map before we copy to userland. */
        bus_dmamap_sync(sc->fw_diag_dmat, sc->fw_diag_map,
            BUS_DMASYNC_POSTREAD);

        /*
         * Copy the requested data from DMA to the diag_read_buffer.  The DMA
         * buffer that was allocated is one contiguous buffer.
         */
        pData = (uint8_t *)(sc->fw_diag_buffer +
            diag_read_buffer->StartingOffset);
        if (copyout(pData, ioctl_buf, diag_read_buffer->BytesToRead) != 0)
                return (MPS_DIAG_FAILURE);
        diag_read_buffer->Status = 0;

        /*
         * Set or clear the Force Release flag.
         */
        if (pBuffer->force_release) {
                diag_read_buffer->Flags |= MPS_FW_DIAG_FLAG_FORCE_RELEASE;
        } else {
                diag_read_buffer->Flags &= ~MPS_FW_DIAG_FLAG_FORCE_RELEASE;
        }

        /*
         * If buffer is to be reregistered, make sure it's not already owned by
         * firmware first.
         */
        status = MPS_DIAG_SUCCESS;
        if (!pBuffer->owned_by_firmware) {
                if (diag_read_buffer->Flags & MPS_FW_DIAG_FLAG_REREGISTER) {
                        status = mps_post_fw_diag_buffer(sc, pBuffer,
                            return_code);
                }
        }

        return (status);
}

static int
mps_diag_release(struct mps_softc *sc, mps_fw_diag_release_t *diag_release,
    uint32_t *return_code)
{
        mps_fw_diagnostic_buffer_t      *pBuffer;
        uint8_t                         i;
        uint32_t                        unique_id;
        int                             status;

        unique_id = diag_release->UniqueId;

        /*
         * Get the current buffer and look up the unique ID.  The unique ID
         * should be there.
         */
        i = mps_get_fw_diag_buffer_number(sc, unique_id);
        if (i == MPS_FW_DIAGNOSTIC_UID_NOT_FOUND) {
                *return_code = MPS_FW_DIAG_ERROR_INVALID_UID;
                return (MPS_DIAG_FAILURE);
        }

        pBuffer = &sc->fw_diag_buffer_list[i];

        /*
         * If buffer is not owned by firmware, it's already been released.
         */
        if (!pBuffer->owned_by_firmware) {
                *return_code = MPS_FW_DIAG_ERROR_ALREADY_RELEASED;
                return (MPS_DIAG_FAILURE);
        }

        /*
         * Release the buffer.
         */
        status = mps_release_fw_diag_buffer(sc, pBuffer, return_code,
            MPS_FW_DIAG_TYPE_RELEASE);
        return (status);
}

static int
mps_do_diag_action(struct mps_softc *sc, uint32_t action, uint8_t *diag_action,
    uint32_t length, uint32_t *return_code)
{
        mps_fw_diag_register_t          diag_register;
        mps_fw_diag_unregister_t        diag_unregister;
        mps_fw_diag_query_t             diag_query;
        mps_diag_read_buffer_t          diag_read_buffer;
        mps_fw_diag_release_t           diag_release;
        int                             status = MPS_DIAG_SUCCESS;
        uint32_t                        original_return_code;

        original_return_code = *return_code;
        *return_code = MPS_FW_DIAG_ERROR_SUCCESS;

        switch (action) {
                case MPS_FW_DIAG_TYPE_REGISTER:
                        if (!length) {
                                *return_code =
                                    MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                                status = MPS_DIAG_FAILURE;
                                break;
                        }
                        if (copyin(diag_action, &diag_register,
                            sizeof(diag_register)) != 0)
                                return (MPS_DIAG_FAILURE);
                        status = mps_diag_register(sc, &diag_register,
                            return_code);
                        break;

                case MPS_FW_DIAG_TYPE_UNREGISTER:
                        if (length < sizeof(diag_unregister)) {
                                *return_code =
                                    MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                                status = MPS_DIAG_FAILURE;
                                break;
                        }
                        if (copyin(diag_action, &diag_unregister,
                            sizeof(diag_unregister)) != 0)
                                return (MPS_DIAG_FAILURE);
                        status = mps_diag_unregister(sc, &diag_unregister,
                            return_code);
                        break;

                case MPS_FW_DIAG_TYPE_QUERY:
                        if (length < sizeof (diag_query)) {
                                *return_code =
                                    MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                                status = MPS_DIAG_FAILURE;
                                break;
                        }
                        if (copyin(diag_action, &diag_query, sizeof(diag_query))
                            != 0)
                                return (MPS_DIAG_FAILURE);
                        status = mps_diag_query(sc, &diag_query, return_code);
                        if (status == MPS_DIAG_SUCCESS)
                                if (copyout(&diag_query, diag_action,
                                    sizeof (diag_query)) != 0)
                                        return (MPS_DIAG_FAILURE);
                        break;

                case MPS_FW_DIAG_TYPE_READ_BUFFER:
                        if (copyin(diag_action, &diag_read_buffer,
                            sizeof(diag_read_buffer)) != 0)
                                return (MPS_DIAG_FAILURE);
                        if (length < diag_read_buffer.BytesToRead) {
                                *return_code =
                                    MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                                status = MPS_DIAG_FAILURE;
                                break;
                        }
                        status = mps_diag_read_buffer(sc, &diag_read_buffer,
                            PTRIN(diag_read_buffer.PtrDataBuffer),
                            return_code);
                        if (status == MPS_DIAG_SUCCESS) {
                                if (copyout(&diag_read_buffer, diag_action,
                                    sizeof(diag_read_buffer) -
                                    sizeof(diag_read_buffer.PtrDataBuffer)) !=
                                    0)
                                        return (MPS_DIAG_FAILURE);
                        }
                        break;

                case MPS_FW_DIAG_TYPE_RELEASE:
                        if (length < sizeof(diag_release)) {
                                *return_code =
                                    MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                                status = MPS_DIAG_FAILURE;
                                break;
                        }
                        if (copyin(diag_action, &diag_release,
                            sizeof(diag_release)) != 0)
                                return (MPS_DIAG_FAILURE);
                        status = mps_diag_release(sc, &diag_release,
                            return_code);
                        break;

                default:
                        *return_code = MPS_FW_DIAG_ERROR_INVALID_PARAMETER;
                        status = MPS_DIAG_FAILURE;
                        break;
        }

        if ((status == MPS_DIAG_FAILURE) &&
            (original_return_code == MPS_FW_DIAG_NEW) &&
            (*return_code != MPS_FW_DIAG_ERROR_SUCCESS))
                status = MPS_DIAG_SUCCESS;

        return (status);
}

static int
mps_user_diag_action(struct mps_softc *sc, mps_diag_action_t *data)
{
        int                     status;

        /*
         * Only allow one diag action at one time.
         */
        if (sc->mps_flags & MPS_FLAGS_BUSY) {
                mps_dprint(sc, MPS_USER, "%s: Only one FW diag command "
                    "allowed at a single time.", __func__);
                return (EBUSY);
        }
        sc->mps_flags |= MPS_FLAGS_BUSY;

        /*
         * Send diag action request
         */
        if (data->Action == MPS_FW_DIAG_TYPE_REGISTER ||
            data->Action == MPS_FW_DIAG_TYPE_UNREGISTER ||
            data->Action == MPS_FW_DIAG_TYPE_QUERY ||
            data->Action == MPS_FW_DIAG_TYPE_READ_BUFFER ||
            data->Action == MPS_FW_DIAG_TYPE_RELEASE) {
                status = mps_do_diag_action(sc, data->Action,
                    PTRIN(data->PtrDiagAction), data->Length,
                    &data->ReturnCode);
        } else
                status = EINVAL;

        sc->mps_flags &= ~MPS_FLAGS_BUSY;
        return (status);
}

/*
 * Copy the event recording mask and the event queue size out.  For
 * clarification, the event recording mask (events_to_record) is not the same
 * thing as the event mask (event_mask).  events_to_record has a bit set for
 * every event type that is to be recorded by the driver, and event_mask has a
 * bit cleared for every event that is allowed into the driver from the IOC.
 * They really have nothing to do with each other.
 */
static void
mps_user_event_query(struct mps_softc *sc, mps_event_query_t *data)
{
        uint8_t i;

        mps_lock(sc);
        data->Entries = MPS_EVENT_QUEUE_SIZE;

        for (i = 0; i < 4; i++) {
                data->Types[i] = sc->events_to_record[i];
        }
        mps_unlock(sc);
}

/*
 * Set the driver's event mask according to what's been given.  See
 * mps_user_event_query for explanation of the event recording mask and the IOC
 * event mask.  It's the app's responsibility to enable event logging by setting
 * the bits in events_to_record.  Initially, no events will be logged.
 */
static void
mps_user_event_enable(struct mps_softc *sc, mps_event_enable_t *data)
{
        uint8_t i;

        mps_lock(sc);
        for (i = 0; i < 4; i++) {
                sc->events_to_record[i] = data->Types[i];
        }
        mps_unlock(sc);
}

/*
 * Copy out the events that have been recorded, up to the max events allowed.
 */
static int
mps_user_event_report(struct mps_softc *sc, mps_event_report_t *data)
{
        int             status = 0;
        uint32_t        size;

        mps_lock(sc);
        size = data->Size;
        if ((size >= sizeof(sc->recorded_events)) && (status == 0)) {
                mps_unlock(sc);
                if (copyout((void *)sc->recorded_events,
                    PTRIN(data->PtrEvents), sizeof(sc->recorded_events)) != 0)
                        status = EFAULT;
                mps_lock(sc);
        } else {
                /*
                 * data->Size value is not large enough to copy event data.
                 */
                status = EFAULT;
        }

        /*
         * Change size value to match the number of bytes that were copied.
         */
        if (status == 0)
                data->Size = sizeof(sc->recorded_events);
        mps_unlock(sc);

        return (status);
}

/*
 * Record events into the driver from the IOC if they are not masked.
 */
void
mpssas_record_event(struct mps_softc *sc,
    MPI2_EVENT_NOTIFICATION_REPLY *event_reply)
{
        uint32_t        event;
        int             i, j;
        uint16_t        event_data_len;
        boolean_t       sendAEN = FALSE;

        event = event_reply->Event;

        /*
         * Generate a system event to let anyone who cares know that a
         * LOG_ENTRY_ADDED event has occurred.  This is sent no matter what the
         * event mask is set to.
         */
        if (event == MPI2_EVENT_LOG_ENTRY_ADDED) {
                sendAEN = TRUE;
        }

        /*
         * Record the event only if its corresponding bit is set in
         * events_to_record.  event_index is the index into recorded_events and
         * event_number is the overall number of an event being recorded since
         * start-of-day.  event_index will roll over; event_number will never
         * roll over.
         */
        i = (uint8_t)(event / 32);
        j = (uint8_t)(event % 32);
        if ((i < 4) && ((1 << j) & sc->events_to_record[i])) {
                i = sc->event_index;
                sc->recorded_events[i].Type = event;
                sc->recorded_events[i].Number = ++sc->event_number;
                bzero(sc->recorded_events[i].Data, MPS_MAX_EVENT_DATA_LENGTH *
                    4);
                event_data_len = event_reply->EventDataLength;

                if (event_data_len > 0) {
                        /*
                         * Limit data to size in m_event entry
                         */
                        if (event_data_len > MPS_MAX_EVENT_DATA_LENGTH) {
                                event_data_len = MPS_MAX_EVENT_DATA_LENGTH;
                        }
                        for (j = 0; j < event_data_len; j++) {
                                sc->recorded_events[i].Data[j] =
                                    event_reply->EventData[j];
                        }

                        /*
                         * check for index wrap-around
                         */
                        if (++i == MPS_EVENT_QUEUE_SIZE) {
                                i = 0;
                        }
                        sc->event_index = (uint8_t)i;

                        /*
                         * Set flag to send the event.
                         */
                        sendAEN = TRUE;
                }
        }

        /*
         * Generate a system event if flag is set to let anyone who cares know
         * that an event has occurred.
         */
        if (sendAEN) {
//SLM-how to send a system event (see kqueue, kevent)
//              (void) ddi_log_sysevent(mpt->m_dip, DDI_VENDOR_LSI, "MPT_SAS",
//                  "SAS", NULL, NULL, DDI_NOSLEEP);
        }
}

static int
mps_user_reg_access(struct mps_softc *sc, mps_reg_access_t *data)
{
        int     status = 0;

        switch (data->Command) {
                /*
                 * IO access is not supported.
                 */
                case REG_IO_READ:
                case REG_IO_WRITE:
                        mps_dprint(sc, MPS_USER, "IO access is not supported. "
                            "Use memory access.");
                        status = EINVAL;
                        break;

                case REG_MEM_READ:
                        data->RegData = mps_regread(sc, data->RegOffset);
                        break;

                case REG_MEM_WRITE:
                        mps_regwrite(sc, data->RegOffset, data->RegData);
                        break;

                default:
                        status = EINVAL;
                        break;
        }

        return (status);
}

static int
mps_user_btdh(struct mps_softc *sc, mps_btdh_mapping_t *data)
{
        uint8_t         bt2dh = FALSE;
        uint8_t         dh2bt = FALSE;
        uint16_t        dev_handle, bus, target;

        bus = data->Bus;
        target = data->TargetID;
        dev_handle = data->DevHandle;

        /*
         * When DevHandle is 0xFFFF and Bus/Target are not 0xFFFF, use Bus/
         * Target to get DevHandle.  When Bus/Target are 0xFFFF and DevHandle is
         * not 0xFFFF, use DevHandle to get Bus/Target.  Anything else is
         * invalid.
         */
        if ((bus == 0xFFFF) && (target == 0xFFFF) && (dev_handle != 0xFFFF))
                dh2bt = TRUE;
        if ((dev_handle == 0xFFFF) && (bus != 0xFFFF) && (target != 0xFFFF))
                bt2dh = TRUE;
        if (!dh2bt && !bt2dh)
                return (EINVAL);

        /*
         * Only handle bus of 0.  Make sure target is within range.
         */
        if (bt2dh) {
                if (bus != 0)
                        return (EINVAL);

                if (target >= sc->max_devices) {
                        mps_dprint(sc, MPS_FAULT, "Target ID is out of range "
                           "for Bus/Target to DevHandle mapping.");
                        return (EINVAL);
                }
                dev_handle = sc->mapping_table[target].dev_handle;
                if (dev_handle)
                        data->DevHandle = dev_handle;
        } else {
                bus = 0;
                target = mps_mapping_get_tid_from_handle(sc, dev_handle);
                data->Bus = bus;
                data->TargetID = target;
        }

        return (0);
}

static int
mps_ioctl(struct cdev *dev, u_long cmd, void *arg, int flag,
    struct thread *td)
{
        struct mps_softc *sc;
        struct mps_cfg_page_req *page_req;
        struct mps_ext_cfg_page_req *ext_page_req;
        void *mps_page;
        int error, msleep_ret;

        mps_page = NULL;
        sc = dev->si_drv1;
        page_req = (void *)arg;
        ext_page_req = (void *)arg;

        switch (cmd) {
        case MPSIO_READ_CFG_HEADER:
                mps_lock(sc);
                error = mps_user_read_cfg_header(sc, page_req);
                mps_unlock(sc);
                break;
        case MPSIO_READ_CFG_PAGE:
                if (page_req->len < (int)sizeof(MPI2_CONFIG_PAGE_HEADER)) {
                        error = EINVAL;
                        break;
                }
                mps_page = malloc(page_req->len, M_MPSUSER, M_WAITOK | M_ZERO);
                error = copyin(page_req->buf, mps_page,
                    sizeof(MPI2_CONFIG_PAGE_HEADER));
                if (error)
                        break;
                mps_lock(sc);
                error = mps_user_read_cfg_page(sc, page_req, mps_page);
                mps_unlock(sc);
                if (error)
                        break;
                error = copyout(mps_page, page_req->buf, page_req->len);
                break;
        case MPSIO_READ_EXT_CFG_HEADER:
                mps_lock(sc);
                error = mps_user_read_extcfg_header(sc, ext_page_req);
                mps_unlock(sc);
                break;
        case MPSIO_READ_EXT_CFG_PAGE:
                if (ext_page_req->len <
                    (int)sizeof(MPI2_CONFIG_EXTENDED_PAGE_HEADER)) {
                        error = EINVAL;
                        break;
                }
                mps_page = malloc(ext_page_req->len, M_MPSUSER, M_WAITOK|M_ZERO);
                error = copyin(ext_page_req->buf, mps_page,
                    sizeof(MPI2_CONFIG_EXTENDED_PAGE_HEADER));
                if (error)
                        break;
                mps_lock(sc);
                error = mps_user_read_extcfg_page(sc, ext_page_req, mps_page);
                mps_unlock(sc);
                if (error)
                        break;
                error = copyout(mps_page, ext_page_req->buf, ext_page_req->len);
                break;
        case MPSIO_WRITE_CFG_PAGE:
                if (page_req->len < (int)sizeof(MPI2_CONFIG_PAGE_HEADER)) {
                        error = EINVAL;
                        break;
                }
                mps_page = malloc(page_req->len, M_MPSUSER, M_WAITOK|M_ZERO);
                error = copyin(page_req->buf, mps_page, page_req->len);
                if (error)
                        break;
                mps_lock(sc);
                error = mps_user_write_cfg_page(sc, page_req, mps_page);
                mps_unlock(sc);
                break;
        case MPSIO_MPS_COMMAND:
                error = mps_user_command(sc, (struct mps_usr_command *)arg);
                break;
        case MPTIOCTL_PASS_THRU:
                /*
                 * The user has requested to pass through a command to be
                 * executed by the MPT firmware.  Call our routine which does
                 * this.  Only allow one passthru IOCTL at one time.
                 */
                error = mps_user_pass_thru(sc, (mps_pass_thru_t *)arg);
                break;
        case MPTIOCTL_GET_ADAPTER_DATA:
                /*
                 * The user has requested to read adapter data.  Call our
                 * routine which does this.
                 */
                error = 0;
                mps_user_get_adapter_data(sc, (mps_adapter_data_t *)arg);
                break;
        case MPTIOCTL_GET_PCI_INFO:
                /*
                 * The user has requested to read pci info.  Call
                 * our routine which does this.
                 */
                mps_lock(sc);
                error = 0;
                mps_user_read_pci_info(sc, (mps_pci_info_t *)arg);
                mps_unlock(sc);
                break;
        case MPTIOCTL_RESET_ADAPTER:
                mps_lock(sc);
                sc->port_enable_complete = 0;
                uint32_t reinit_start = time_uptime;
                error = mps_reinit(sc);
                /* Sleep for 300 second. */
                msleep_ret = msleep(&sc->port_enable_complete, &sc->mps_mtx, PRIBIO,
                       "mps_porten", 300 * hz);
                mps_unlock(sc);
                if (msleep_ret)
                        printf("Port Enable did not complete after Diag "
                            "Reset msleep error %d.\n", msleep_ret);
                else
                        mps_dprint(sc, MPS_USER,
                                "Hard Reset with Port Enable completed in %d seconds.\n",
                                 (uint32_t) (time_uptime - reinit_start));
                break;
        case MPTIOCTL_DIAG_ACTION:
                /*
                 * The user has done a diag buffer action.  Call our routine
                 * which does this.  Only allow one diag action at one time.
                 */
                mps_lock(sc);
                error = mps_user_diag_action(sc, (mps_diag_action_t *)arg);
                mps_unlock(sc);
                break;
        case MPTIOCTL_EVENT_QUERY:
                /*
                 * The user has done an event query. Call our routine which does
                 * this.
                 */
                error = 0;
                mps_user_event_query(sc, (mps_event_query_t *)arg);
                break;
        case MPTIOCTL_EVENT_ENABLE:
                /*
                 * The user has done an event enable. Call our routine which
                 * does this.
                 */
                error = 0;
                mps_user_event_enable(sc, (mps_event_enable_t *)arg);
                break;
        case MPTIOCTL_EVENT_REPORT:
                /*
                 * The user has done an event report. Call our routine which
                 * does this.
                 */
                error = mps_user_event_report(sc, (mps_event_report_t *)arg);
                break;
        case MPTIOCTL_REG_ACCESS:
                /*
                 * The user has requested register access.  Call our routine
                 * which does this.
                 */
                mps_lock(sc);
                error = mps_user_reg_access(sc, (mps_reg_access_t *)arg);
                mps_unlock(sc);
                break;
        case MPTIOCTL_BTDH_MAPPING:
                /*
                 * The user has requested to translate a bus/target to a
                 * DevHandle or a DevHandle to a bus/target.  Call our routine
                 * which does this.
                 */
                error = mps_user_btdh(sc, (mps_btdh_mapping_t *)arg);
                break;
        default:
                error = ENOIOCTL;
                break;
        }

        if (mps_page != NULL)
                free(mps_page, M_MPSUSER);

        return (error);
}

#ifdef COMPAT_FREEBSD32

struct mps_cfg_page_req32 {
        MPI2_CONFIG_PAGE_HEADER header;
        uint32_t page_address;
        uint32_t buf;
        int     len;    
        uint16_t ioc_status;
};

struct mps_ext_cfg_page_req32 {
        MPI2_CONFIG_EXTENDED_PAGE_HEADER header;
        uint32_t page_address;
        uint32_t buf;
        int     len;
        uint16_t ioc_status;
};

struct mps_raid_action32 {
        uint8_t action;
        uint8_t volume_bus;
        uint8_t volume_id;
        uint8_t phys_disk_num;
        uint32_t action_data_word;
        uint32_t buf;
        int len;
        uint32_t volume_status;
        uint32_t action_data[4];
        uint16_t action_status;
        uint16_t ioc_status;
        uint8_t write;
};

struct mps_usr_command32 {
        uint32_t req;
        uint32_t req_len;
        uint32_t rpl;
        uint32_t rpl_len;
        uint32_t buf;
        int len;
        uint32_t flags;
};

#define MPSIO_READ_CFG_HEADER32 _IOWR('M', 200, struct mps_cfg_page_req32)
#define MPSIO_READ_CFG_PAGE32   _IOWR('M', 201, struct mps_cfg_page_req32)
#define MPSIO_READ_EXT_CFG_HEADER32 _IOWR('M', 202, struct mps_ext_cfg_page_req32)
#define MPSIO_READ_EXT_CFG_PAGE32 _IOWR('M', 203, struct mps_ext_cfg_page_req32)
#define MPSIO_WRITE_CFG_PAGE32  _IOWR('M', 204, struct mps_cfg_page_req32)
#define MPSIO_RAID_ACTION32     _IOWR('M', 205, struct mps_raid_action32)
#define MPSIO_MPS_COMMAND32     _IOWR('M', 210, struct mps_usr_command32)

static int
mps_ioctl32(struct cdev *dev, u_long cmd32, void *_arg, int flag,
    struct thread *td)
{
        struct mps_cfg_page_req32 *page32 = _arg;
        struct mps_ext_cfg_page_req32 *ext32 = _arg;
        struct mps_raid_action32 *raid32 = _arg;
        struct mps_usr_command32 *user32 = _arg;
        union {
                struct mps_cfg_page_req page;
                struct mps_ext_cfg_page_req ext;
                struct mps_raid_action raid;
                struct mps_usr_command user;
        } arg;
        u_long cmd;
        int error;

        switch (cmd32) {
        case MPSIO_READ_CFG_HEADER32:
        case MPSIO_READ_CFG_PAGE32:
        case MPSIO_WRITE_CFG_PAGE32:
                if (cmd32 == MPSIO_READ_CFG_HEADER32)
                        cmd = MPSIO_READ_CFG_HEADER;
                else if (cmd32 == MPSIO_READ_CFG_PAGE32)
                        cmd = MPSIO_READ_CFG_PAGE;
                else
                        cmd = MPSIO_WRITE_CFG_PAGE;
                CP(*page32, arg.page, header);
                CP(*page32, arg.page, page_address);
                PTRIN_CP(*page32, arg.page, buf);
                CP(*page32, arg.page, len);
                CP(*page32, arg.page, ioc_status);
                break;

        case MPSIO_READ_EXT_CFG_HEADER32:
        case MPSIO_READ_EXT_CFG_PAGE32:
                if (cmd32 == MPSIO_READ_EXT_CFG_HEADER32)
                        cmd = MPSIO_READ_EXT_CFG_HEADER;
                else
                        cmd = MPSIO_READ_EXT_CFG_PAGE;
                CP(*ext32, arg.ext, header);
                CP(*ext32, arg.ext, page_address);
                PTRIN_CP(*ext32, arg.ext, buf);
                CP(*ext32, arg.ext, len);
                CP(*ext32, arg.ext, ioc_status);
                break;

        case MPSIO_RAID_ACTION32:
                cmd = MPSIO_RAID_ACTION;
                CP(*raid32, arg.raid, action);
                CP(*raid32, arg.raid, volume_bus);
                CP(*raid32, arg.raid, volume_id);
                CP(*raid32, arg.raid, phys_disk_num);
                CP(*raid32, arg.raid, action_data_word);
                PTRIN_CP(*raid32, arg.raid, buf);
                CP(*raid32, arg.raid, len);
                CP(*raid32, arg.raid, volume_status);
                bcopy(raid32->action_data, arg.raid.action_data,
                    sizeof arg.raid.action_data);
                CP(*raid32, arg.raid, ioc_status);
                CP(*raid32, arg.raid, write);
                break;

        case MPSIO_MPS_COMMAND32:
                cmd = MPSIO_MPS_COMMAND;
                PTRIN_CP(*user32, arg.user, req);
                CP(*user32, arg.user, req_len);
                PTRIN_CP(*user32, arg.user, rpl);
                CP(*user32, arg.user, rpl_len);
                PTRIN_CP(*user32, arg.user, buf);
                CP(*user32, arg.user, len);
                CP(*user32, arg.user, flags);
                break;
        default:
                return (ENOIOCTL);
        }

        error = mps_ioctl(dev, cmd, &arg, flag, td);
        if (error == 0 && (cmd32 & IOC_OUT) != 0) {
                switch (cmd32) {
                case MPSIO_READ_CFG_HEADER32:
                case MPSIO_READ_CFG_PAGE32:
                case MPSIO_WRITE_CFG_PAGE32:
                        CP(arg.page, *page32, header);
                        CP(arg.page, *page32, page_address);
                        PTROUT_CP(arg.page, *page32, buf);
                        CP(arg.page, *page32, len);
                        CP(arg.page, *page32, ioc_status);
                        break;

                case MPSIO_READ_EXT_CFG_HEADER32:
                case MPSIO_READ_EXT_CFG_PAGE32:
                        CP(arg.ext, *ext32, header);
                        CP(arg.ext, *ext32, page_address);
                        PTROUT_CP(arg.ext, *ext32, buf);
                        CP(arg.ext, *ext32, len);
                        CP(arg.ext, *ext32, ioc_status);
                        break;

                case MPSIO_RAID_ACTION32:
                        CP(arg.raid, *raid32, action);
                        CP(arg.raid, *raid32, volume_bus);
                        CP(arg.raid, *raid32, volume_id);
                        CP(arg.raid, *raid32, phys_disk_num);
                        CP(arg.raid, *raid32, action_data_word);
                        PTROUT_CP(arg.raid, *raid32, buf);
                        CP(arg.raid, *raid32, len);
                        CP(arg.raid, *raid32, volume_status);
                        bcopy(arg.raid.action_data, raid32->action_data,
                            sizeof arg.raid.action_data);
                        CP(arg.raid, *raid32, ioc_status);
                        CP(arg.raid, *raid32, write);
                        break;

                case MPSIO_MPS_COMMAND32:
                        PTROUT_CP(arg.user, *user32, req);
                        CP(arg.user, *user32, req_len);
                        PTROUT_CP(arg.user, *user32, rpl);
                        CP(arg.user, *user32, rpl_len);
                        PTROUT_CP(arg.user, *user32, buf);
                        CP(arg.user, *user32, len);
                        CP(arg.user, *user32, flags);
                        break;
                }
        }

        return (error);
}
#endif /* COMPAT_FREEBSD32 */

static int
mps_ioctl_devsw(struct cdev *dev, u_long com, caddr_t arg, int flag,
    struct thread *td)
{
#ifdef COMPAT_FREEBSD32
        if (SV_CURPROC_FLAG(SV_ILP32))
                return (mps_ioctl32(dev, com, arg, flag, td));
#endif
        return (mps_ioctl(dev, com, arg, flag, td));
}