sys/dev/hptrr/hptrr_osm_bsd.c

root/sys/dev/hptrr/hptrr_osm_bsd.c
/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) HighPoint Technologies, Inc.
 * 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.
 */

#include <sys/cdefs.h>
#include <dev/hptrr/hptrr_config.h>
/* $Id: osm_bsd.c,v 1.27 2007/11/22 07:35:49 gmm Exp $
 *
 * HighPoint RAID Driver for FreeBSD
 * Copyright (C) 2005 HighPoint Technologies, Inc. All Rights Reserved.
 */
#include <dev/hptrr/os_bsd.h>
#include <dev/hptrr/hptintf.h>

static int attach_generic = 0;
TUNABLE_INT("hw.hptrr.attach_generic", &attach_generic);

static HIM *hpt_match(device_t dev)
{
        PCI_ID pci_id;
        int i;
        HIM *him;

        /* Some of supported chips are used not only by HPT. */
        if (pci_get_vendor(dev) != 0x1103 && !attach_generic)
                return (NULL);
        for (him = him_list; him; him = him->next) {
                for (i=0; him->get_supported_device_id(i, &pci_id); i++) {
                        if ((pci_get_vendor(dev) == pci_id.vid) &&
                                (pci_get_device(dev) == pci_id.did)){
                                return (him);
                        }
                }
        }
        return (NULL);
}

static int hpt_probe(device_t dev)
{
        HIM *him;

        him = hpt_match(dev);
        if (him != NULL) {
                KdPrint(("hpt_probe: adapter at PCI %d:%d:%d, IRQ %d",
                        pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev), pci_get_irq(dev)
                            ));
                device_set_desc(dev, him->name);
                return (BUS_PROBE_DEFAULT);
        }

        return (ENXIO);
}

static int hpt_attach(device_t dev)
{
        PHBA hba = (PHBA)device_get_softc(dev);
        HIM *him;
        PCI_ID pci_id;
        HPT_UINT size;
        PVBUS vbus;
        PVBUS_EXT vbus_ext;
        
        KdPrint(("hpt_attach(%d/%d/%d)", pci_get_bus(dev), pci_get_slot(dev), pci_get_function(dev)));

        him = hpt_match(dev);
        hba->ext_type = EXT_TYPE_HBA;
        hba->ldm_adapter.him = him;

        pci_enable_busmaster(dev);

        pci_id.vid = pci_get_vendor(dev);
        pci_id.did = pci_get_device(dev);
        pci_id.rev = pci_get_revid(dev);

        size = him->get_adapter_size(&pci_id);
        hba->ldm_adapter.him_handle = malloc(size, M_DEVBUF, M_WAITOK);

        hba->pcidev = dev;
        hba->pciaddr.tree = 0;
        hba->pciaddr.bus = pci_get_bus(dev);
        hba->pciaddr.device = pci_get_slot(dev);
        hba->pciaddr.function = pci_get_function(dev);

        if (!him->create_adapter(&pci_id, hba->pciaddr, hba->ldm_adapter.him_handle, hba)) {
                free(hba->ldm_adapter.him_handle, M_DEVBUF);
                return ENXIO;
        }

        os_printk("adapter at PCI %d:%d:%d, IRQ %d",
                hba->pciaddr.bus, hba->pciaddr.device, hba->pciaddr.function, pci_get_irq(dev));

        if (!ldm_register_adapter(&hba->ldm_adapter)) {
                size = ldm_get_vbus_size();
                vbus_ext = malloc(sizeof(VBUS_EXT) + size, M_DEVBUF, M_WAITOK |
                    M_ZERO);
                vbus_ext->ext_type = EXT_TYPE_VBUS;
                ldm_create_vbus((PVBUS)vbus_ext->vbus, vbus_ext);
                ldm_register_adapter(&hba->ldm_adapter);
        }

        ldm_for_each_vbus(vbus, vbus_ext) {
                if (hba->ldm_adapter.vbus==vbus) {
                        hba->vbus_ext = vbus_ext;
                        hba->next = vbus_ext->hba_list;
                        vbus_ext->hba_list = hba;
                        break;
                }
        }       
        return 0;
}

/*
 * Maybe we'd better to use the bus_dmamem_alloc to alloc DMA memory,
 * but there are some problems currently (alignment, etc).
 */
static __inline void *__get_free_pages(int order)
{
        /* don't use low memory - other devices may get starved */
        return contigmalloc(PAGE_SIZE<<order, 
                        M_DEVBUF, M_WAITOK, BUS_SPACE_MAXADDR_24BIT, BUS_SPACE_MAXADDR, PAGE_SIZE, 0);
}

static __inline void free_pages(void *p)
{
        free(p, M_DEVBUF);
}

static int hpt_alloc_mem(PVBUS_EXT vbus_ext)
{
        PHBA hba;
        struct freelist *f;
        HPT_UINT i;
        void **p;

        for (hba = vbus_ext->hba_list; hba; hba = hba->next)
                hba->ldm_adapter.him->get_meminfo(hba->ldm_adapter.him_handle);

        ldm_get_mem_info((PVBUS)vbus_ext->vbus, 0);

        for (f=vbus_ext->freelist_head; f; f=f->next) {
                KdPrint(("%s: %d*%d=%d bytes",
                        f->tag, f->count, f->size, f->count*f->size));
                for (i=0; i<f->count; i++) {
                        p = (void **)malloc(f->size, M_DEVBUF, M_WAITOK);
                        if (!p) return (ENXIO);
                        *p = f->head;
                        f->head = p;
                }
        }

        for (f=vbus_ext->freelist_dma_head; f; f=f->next) {
                int order, size, j;

                HPT_ASSERT((f->size & (f->alignment-1))==0);

                for (order=0, size=PAGE_SIZE; size<f->size; order++, size<<=1)
                        ;

                KdPrint(("%s: %d*%d=%d bytes, order %d",
                        f->tag, f->count, f->size, f->count*f->size, order));
                HPT_ASSERT(f->alignment<=PAGE_SIZE);

                for (i=0; i<f->count;) {
                        p = (void **)__get_free_pages(order);
                        if (!p) return -1;
                        for (j = size/f->size; j && i<f->count; i++,j--) {
                                *p = f->head;
                                *(BUS_ADDRESS *)(p+1) = (BUS_ADDRESS)vtophys(p);
                                f->head = p;
                                p = (void **)((unsigned long)p + f->size);
                        }
                }
        }
        
        HPT_ASSERT(PAGE_SIZE==DMAPOOL_PAGE_SIZE);

        for (i=0; i<os_max_cache_pages; i++) {
                p = (void **)__get_free_pages(0);
                if (!p) return -1;
                HPT_ASSERT(((HPT_UPTR)p & (DMAPOOL_PAGE_SIZE-1))==0);
                dmapool_put_page((PVBUS)vbus_ext->vbus, p, (BUS_ADDRESS)vtophys(p));
        }

        return 0;
}

static void hpt_free_mem(PVBUS_EXT vbus_ext)
{
        struct freelist *f;
        void *p;
        int i;
        BUS_ADDRESS bus;

        for (f=vbus_ext->freelist_head; f; f=f->next) {
#if DBG
                if (f->count!=f->reserved_count) {
                        KdPrint(("memory leak for freelist %s (%d/%d)", f->tag, f->count, f->reserved_count));
                }
#endif
                while ((p=freelist_get(f)))
                        free(p, M_DEVBUF);
        }

        for (i=0; i<os_max_cache_pages; i++) {
                p = dmapool_get_page((PVBUS)vbus_ext->vbus, &bus);
                HPT_ASSERT(p);
                free_pages(p);
        }

        for (f=vbus_ext->freelist_dma_head; f; f=f->next) {
                int order, size;
#if DBG
                if (f->count!=f->reserved_count) {
                        KdPrint(("memory leak for dma freelist %s (%d/%d)", f->tag, f->count, f->reserved_count));
                }
#endif
                for (order=0, size=PAGE_SIZE; size<f->size; order++, size<<=1) ;

                while ((p=freelist_get_dma(f, &bus))) {
                        if (order)
                                free_pages(p);
                        else {
                        /* can't free immediately since other blocks in this page may still be in the list */
                                if (((HPT_UPTR)p & (PAGE_SIZE-1))==0)
                                        dmapool_put_page((PVBUS)vbus_ext->vbus, p, bus);
                        }
                }
        }
        
        while ((p = dmapool_get_page((PVBUS)vbus_ext->vbus, &bus)))
                free_pages(p);
}

static int hpt_init_vbus(PVBUS_EXT vbus_ext)
{
        PHBA hba;

        for (hba = vbus_ext->hba_list; hba; hba = hba->next)
                if (!hba->ldm_adapter.him->initialize(hba->ldm_adapter.him_handle)) {
                        KdPrint(("fail to initialize %p", hba));
                        return -1;
                }

        ldm_initialize_vbus((PVBUS)vbus_ext->vbus, &vbus_ext->hba_list->ldm_adapter);
        return 0;
}

static void hpt_flush_done(PCOMMAND pCmd)
{
        PVDEV vd = pCmd->target;

        if (mIsArray(vd->type) && vd->u.array.transform && vd!=vd->u.array.transform->target) {
                vd = vd->u.array.transform->target;
                HPT_ASSERT(vd);
                pCmd->target = vd;
                pCmd->Result = RETURN_PENDING;
                vdev_queue_cmd(pCmd);
                return;
        }

        *(int *)pCmd->priv = 1;
        wakeup(pCmd);
}

/*
 * flush a vdev (without retry).
 */
static int hpt_flush_vdev(PVBUS_EXT vbus_ext, PVDEV vd)
{
        PCOMMAND pCmd;
        int result = 0, done;
        HPT_UINT count;

        KdPrint(("flusing dev %p", vd));

        hpt_assert_vbus_locked(vbus_ext);

        if (mIsArray(vd->type) && vd->u.array.transform)
                count = max(vd->u.array.transform->source->cmds_per_request,
                                        vd->u.array.transform->target->cmds_per_request);
        else
                count = vd->cmds_per_request;

        pCmd = ldm_alloc_cmds(vd->vbus, count);

        if (!pCmd) {
                return -1;
        }

        pCmd->type = CMD_TYPE_FLUSH;
        pCmd->flags.hard_flush = 1;
        pCmd->target = vd;
        pCmd->done = hpt_flush_done;
        done = 0;
        pCmd->priv = &done;

        ldm_queue_cmd(pCmd);
        
        if (!done) {
                while (hpt_sleep(vbus_ext, pCmd, PPAUSE, "hptfls", HPT_OSM_TIMEOUT)) {
                        ldm_reset_vbus(vd->vbus);
                }
        }

        KdPrint(("flush result %d", pCmd->Result));

        if (pCmd->Result!=RETURN_SUCCESS)
                result = -1;

        ldm_free_cmds(pCmd);

        return result;
}

static void hpt_stop_tasks(PVBUS_EXT vbus_ext);
static void hpt_shutdown_vbus(PVBUS_EXT vbus_ext, int howto)
{
        PVBUS     vbus = (PVBUS)vbus_ext->vbus;
        PHBA hba;
        int i;
        
        KdPrint(("hpt_shutdown_vbus"));

        /* stop all ctl tasks and disable the worker taskqueue */
        hpt_stop_tasks(vbus_ext);
        hpt_lock_vbus(vbus_ext);
        vbus_ext->worker.ta_context = 0;

        /* flush devices */
        for (i=0; i<osm_max_targets; i++) {
                PVDEV vd = ldm_find_target(vbus, i);
                if (vd) {
                        /* retry once */
                        if (hpt_flush_vdev(vbus_ext, vd))
                                hpt_flush_vdev(vbus_ext, vd);
                }
        }

        ldm_shutdown(vbus);
        hpt_unlock_vbus(vbus_ext);

        ldm_release_vbus(vbus);

        for (hba=vbus_ext->hba_list; hba; hba=hba->next)
                bus_teardown_intr(hba->pcidev, hba->irq_res, hba->irq_handle);

        hpt_free_mem(vbus_ext);

        while ((hba=vbus_ext->hba_list)) {
                vbus_ext->hba_list = hba->next;
                free(hba->ldm_adapter.him_handle, M_DEVBUF);
        }

        callout_drain(&vbus_ext->timer);
        mtx_destroy(&vbus_ext->lock);
        free(vbus_ext, M_DEVBUF);
        KdPrint(("hpt_shutdown_vbus done"));
}

static void __hpt_do_tasks(PVBUS_EXT vbus_ext)
{
        OSM_TASK *tasks;

        tasks = vbus_ext->tasks;
        vbus_ext->tasks = 0;

        while (tasks) {
                OSM_TASK *t = tasks;
                tasks = t->next;
                t->next = 0;
                t->func(vbus_ext->vbus, t->data);
        }
}

static void hpt_do_tasks(PVBUS_EXT vbus_ext, int pending)
{
        if(vbus_ext){
                hpt_lock_vbus(vbus_ext);
                __hpt_do_tasks(vbus_ext);
                hpt_unlock_vbus(vbus_ext);
        }
}

static void hpt_action(struct cam_sim *sim, union ccb *ccb);
static void hpt_poll(struct cam_sim *sim);
static void hpt_async(void * callback_arg, u_int32_t code, struct cam_path * path, void * arg);
static void hpt_pci_intr(void *arg);

static __inline POS_CMDEXT cmdext_get(PVBUS_EXT vbus_ext)
{
        POS_CMDEXT p = vbus_ext->cmdext_list;
        if (p)
                vbus_ext->cmdext_list = p->next;
        return p;
}

static __inline void cmdext_put(POS_CMDEXT p)
{
        p->next = p->vbus_ext->cmdext_list;
        p->vbus_ext->cmdext_list = p;
}

static void hpt_timeout(void *arg)
{
        PCOMMAND pCmd = (PCOMMAND)arg;
        POS_CMDEXT ext = (POS_CMDEXT)pCmd->priv;
        
        KdPrint(("pCmd %p timeout", pCmd));
        
        ldm_reset_vbus((PVBUS)ext->vbus_ext->vbus);
}

static void os_cmddone(PCOMMAND pCmd)
{
        POS_CMDEXT ext = (POS_CMDEXT)pCmd->priv;
        union ccb *ccb = ext->ccb;

        KdPrint(("os_cmddone(%p, %d)", pCmd, pCmd->Result));

        callout_stop(&ext->timeout);

        switch(pCmd->Result) {
        case RETURN_SUCCESS:
                ccb->ccb_h.status = CAM_REQ_CMP;
                break;
        case RETURN_BAD_DEVICE:
                ccb->ccb_h.status = CAM_DEV_NOT_THERE;
                break;
        case RETURN_DEVICE_BUSY:
                ccb->ccb_h.status = CAM_BUSY;
                break;
        case RETURN_INVALID_REQUEST:
                ccb->ccb_h.status = CAM_REQ_INVALID;
                break;
        case RETURN_SELECTION_TIMEOUT:
                ccb->ccb_h.status = CAM_SEL_TIMEOUT;
                break;
        case RETURN_RETRY:
                ccb->ccb_h.status = CAM_BUSY;
                break;
        default:
                ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
                break;
        }

        if (pCmd->flags.data_in) {
                bus_dmamap_sync(ext->vbus_ext->io_dmat, ext->dma_map, BUS_DMASYNC_POSTREAD);
        }
        else if (pCmd->flags.data_out) {
                bus_dmamap_sync(ext->vbus_ext->io_dmat, ext->dma_map, BUS_DMASYNC_POSTWRITE);
        }
        
        bus_dmamap_unload(ext->vbus_ext->io_dmat, ext->dma_map);

        cmdext_put(ext);
        ldm_free_cmds(pCmd);
        xpt_done(ccb);
}

static int os_buildsgl(PCOMMAND pCmd, PSG pSg, int logical)
{
        POS_CMDEXT ext = (POS_CMDEXT)pCmd->priv;
        union ccb *ccb = ext->ccb;

        if (logical) {
                os_set_sgptr(pSg, (HPT_U8 *)ccb->csio.data_ptr);
                pSg->size = ccb->csio.dxfer_len;
                pSg->eot = 1;
                return TRUE;
        }

        /* since we have provided physical sg, nobody will ask us to build physical sg */
        HPT_ASSERT(0);
        return FALSE;
}

static void hpt_io_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
        PCOMMAND pCmd = (PCOMMAND)arg;
        POS_CMDEXT ext = (POS_CMDEXT)pCmd->priv;
        PSG psg = pCmd->psg;
        int idx;
        
        HPT_ASSERT(pCmd->flags.physical_sg);
        
        if (error)
                panic("busdma error");
                
        HPT_ASSERT(nsegs<=os_max_sg_descriptors);

        if (nsegs != 0) {
                for (idx = 0; idx < nsegs; idx++, psg++) {
                        psg->addr.bus = segs[idx].ds_addr;
                        psg->size = segs[idx].ds_len;
                        psg->eot = 0;
                }
                        psg[-1].eot = 1;
                
                if (pCmd->flags.data_in) {
                        bus_dmamap_sync(ext->vbus_ext->io_dmat, ext->dma_map,
                            BUS_DMASYNC_PREREAD);
                }
                else if (pCmd->flags.data_out) {
                        bus_dmamap_sync(ext->vbus_ext->io_dmat, ext->dma_map,
                            BUS_DMASYNC_PREWRITE);
                }
        }
        callout_reset(&ext->timeout, HPT_OSM_TIMEOUT, hpt_timeout, pCmd);
        ldm_queue_cmd(pCmd);
}

static void hpt_scsi_io(PVBUS_EXT vbus_ext, union ccb *ccb)
{
        PVBUS vbus = (PVBUS)vbus_ext->vbus;
        PVDEV vd;
        PCOMMAND pCmd;
        POS_CMDEXT ext;
        HPT_U8 *cdb;

        if (ccb->ccb_h.flags & CAM_CDB_POINTER)
                cdb = ccb->csio.cdb_io.cdb_ptr;
        else
                cdb = ccb->csio.cdb_io.cdb_bytes;
        
        KdPrint(("hpt_scsi_io: ccb %x id %d lun %d cdb %x-%x-%x",
                ccb,
                ccb->ccb_h.target_id, ccb->ccb_h.target_lun,
                *(HPT_U32 *)&cdb[0], *(HPT_U32 *)&cdb[4], *(HPT_U32 *)&cdb[8]
        ));

        /* ccb->ccb_h.path_id is not our bus id - don't check it */
        if (ccb->ccb_h.target_lun != 0 ||
                ccb->ccb_h.target_id >= osm_max_targets ||
                (ccb->ccb_h.flags & CAM_CDB_PHYS))
        {
                ccb->ccb_h.status = CAM_SEL_TIMEOUT;
                xpt_done(ccb);
                return;
        }

        vd = ldm_find_target(vbus, ccb->ccb_h.target_id);

        if (!vd) {
                ccb->ccb_h.status = CAM_SEL_TIMEOUT;
                xpt_done(ccb);
                return;
        }
   
        switch (cdb[0]) {
        case TEST_UNIT_READY:
        case START_STOP_UNIT:
        case SYNCHRONIZE_CACHE:
                ccb->ccb_h.status = CAM_REQ_CMP;
                break;

        case INQUIRY:
                {
                        PINQUIRYDATA inquiryData;
                        memset(ccb->csio.data_ptr, 0, ccb->csio.dxfer_len);
                        inquiryData = (PINQUIRYDATA)ccb->csio.data_ptr;
                
                        inquiryData->AdditionalLength = 31;
                        inquiryData->CommandQueue = 1;
                        memcpy(&inquiryData->VendorId, "HPT     ", 8);
                        memcpy(&inquiryData->ProductId, "DISK 0_0        ", 16);
        
                        if (vd->target_id / 10) {
                                inquiryData->ProductId[7] = (vd->target_id % 100) / 10 + '0';
                                inquiryData->ProductId[8] = (vd->target_id % 100) % 10 + '0';
                        }
                        else
                                inquiryData->ProductId[7] = (vd->target_id % 100) % 10 + '0';
        
                        memcpy(&inquiryData->ProductRevisionLevel, "4.00", 4);
        
                        ccb->ccb_h.status = CAM_REQ_CMP;
                }
                break;

        case READ_CAPACITY:
        {
                HPT_U8 *rbuf = ccb->csio.data_ptr;
                HPT_U32 cap;
                
                if (vd->capacity>0xfffffffful)
                        cap = 0xfffffffful;
                else
                        cap = vd->capacity - 1;
        
                rbuf[0] = (HPT_U8)(cap>>24);
                rbuf[1] = (HPT_U8)(cap>>16);
                rbuf[2] = (HPT_U8)(cap>>8);
                rbuf[3] = (HPT_U8)cap;
                rbuf[4] = 0;
                rbuf[5] = 0;
                rbuf[6] = 2;
                rbuf[7] = 0;

                ccb->ccb_h.status = CAM_REQ_CMP;
                break;
        }
        
        case SERVICE_ACTION_IN: 
        {
                HPT_U8 *rbuf = ccb->csio.data_ptr;
                HPT_U64 cap = vd->capacity - 1;
                
                rbuf[0] = (HPT_U8)(cap>>56);
                rbuf[1] = (HPT_U8)(cap>>48);
                rbuf[2] = (HPT_U8)(cap>>40);
                rbuf[3] = (HPT_U8)(cap>>32);
                rbuf[4] = (HPT_U8)(cap>>24);
                rbuf[5] = (HPT_U8)(cap>>16);
                rbuf[6] = (HPT_U8)(cap>>8);
                rbuf[7] = (HPT_U8)cap;
                rbuf[8] = 0;
                rbuf[9] = 0;
                rbuf[10] = 2;
                rbuf[11] = 0;
                
                ccb->ccb_h.status = CAM_REQ_CMP;
                break;  
        }
        
        case READ_6:
        case READ_10:
        case READ_16:
        case WRITE_6:
        case WRITE_10:
        case WRITE_16:
        case 0x13:
        case 0x2f:
        {
                int error;

                pCmd = ldm_alloc_cmds(vbus, vd->cmds_per_request);
                if(!pCmd){
                        KdPrint(("Failed to allocate command!"));
                        ccb->ccb_h.status = CAM_BUSY;
                        break;
                }

                switch (cdb[0]) {
                case READ_6:
                case WRITE_6:
                case 0x13:
                        pCmd->uCmd.Ide.Lba =  ((HPT_U32)cdb[1] << 16) | ((HPT_U32)cdb[2] << 8) | (HPT_U32)cdb[3];
                        pCmd->uCmd.Ide.nSectors = (HPT_U16) cdb[4];
                        break;
                case READ_16:
                case WRITE_16: 
                {
                        HPT_U64 block =
                                ((HPT_U64)cdb[2]<<56) |
                                ((HPT_U64)cdb[3]<<48) |
                                ((HPT_U64)cdb[4]<<40) |
                                ((HPT_U64)cdb[5]<<32) |
                                ((HPT_U64)cdb[6]<<24) |
                                ((HPT_U64)cdb[7]<<16) |
                                ((HPT_U64)cdb[8]<<8) |
                                ((HPT_U64)cdb[9]);
                        pCmd->uCmd.Ide.Lba = block;
                        pCmd->uCmd.Ide.nSectors = (HPT_U16)cdb[13] | ((HPT_U16)cdb[12]<<8);
                        break;
                }
                
                default:
                        pCmd->uCmd.Ide.Lba = (HPT_U32)cdb[5] | ((HPT_U32)cdb[4] << 8) | ((HPT_U32)cdb[3] << 16) | ((HPT_U32)cdb[2] << 24);
                        pCmd->uCmd.Ide.nSectors = (HPT_U16) cdb[8] | ((HPT_U16)cdb[7]<<8);
                        break;
                }
                
                switch (cdb[0]) {
                case READ_6:
                case READ_10:
                case READ_16:
                        pCmd->flags.data_in = 1;
                        break;
                case WRITE_6:
                case WRITE_10:
                case WRITE_16:
                        pCmd->flags.data_out = 1;
                        break;
                }
                pCmd->priv = ext = cmdext_get(vbus_ext);
                HPT_ASSERT(ext);
                ext->ccb = ccb;
                pCmd->target = vd;
                pCmd->done = os_cmddone;
                pCmd->buildsgl = os_buildsgl;
                pCmd->psg = ext->psg;
                pCmd->flags.physical_sg = 1;
                error = bus_dmamap_load_ccb(vbus_ext->io_dmat, 
                                        ext->dma_map, 
                                        ccb,
                                        hpt_io_dmamap_callback, pCmd,
                                        BUS_DMA_WAITOK
                                        );
                KdPrint(("bus_dmamap_load return %d", error));
                if (error && error!=EINPROGRESS) {
                        os_printk("bus_dmamap_load error %d", error);
                        cmdext_put(ext);
                        ldm_free_cmds(pCmd);
                        ccb->ccb_h.status = CAM_REQ_CMP_ERR;
                        xpt_done(ccb);
                }
                return;
        }

        default:
                ccb->ccb_h.status = CAM_REQ_INVALID;
                break;
        }

        xpt_done(ccb);
        return;
}

static void hpt_action(struct cam_sim *sim, union ccb *ccb)
{
        PVBUS_EXT vbus_ext = (PVBUS_EXT)cam_sim_softc(sim);

        KdPrint(("hpt_action(fn=%d, id=%d)", ccb->ccb_h.func_code, ccb->ccb_h.target_id));

        hpt_assert_vbus_locked(vbus_ext);
        switch (ccb->ccb_h.func_code) {
        
        case XPT_SCSI_IO:
                hpt_scsi_io(vbus_ext, ccb);
                return;

        case XPT_RESET_BUS:
                ldm_reset_vbus((PVBUS)vbus_ext->vbus);
                break;

        case XPT_GET_TRAN_SETTINGS:
        case XPT_SET_TRAN_SETTINGS:
                ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
                break;

        case XPT_CALC_GEOMETRY:
                cam_calc_geometry(&ccb->ccg, 1);
                break;

        case XPT_PATH_INQ:
        {
                struct ccb_pathinq *cpi = &ccb->cpi;

                cpi->version_num = 1;
                cpi->hba_inquiry = PI_SDTR_ABLE;
                cpi->target_sprt = 0;
                cpi->hba_misc = PIM_NOBUSRESET;
                cpi->hba_eng_cnt = 0;
                cpi->max_target = osm_max_targets;
                cpi->max_lun = 0;
                cpi->unit_number = cam_sim_unit(sim);
                cpi->bus_id = cam_sim_bus(sim);
                cpi->initiator_id = osm_max_targets;
                cpi->base_transfer_speed = 3300;

                strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
                strlcpy(cpi->hba_vid, "HPT   ", HBA_IDLEN);
                strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
                cpi->transport = XPORT_SPI;
                cpi->transport_version = 2;
                cpi->protocol = PROTO_SCSI;
                cpi->protocol_version = SCSI_REV_2;
                cpi->ccb_h.status = CAM_REQ_CMP;
                break;
        }

        default:
                ccb->ccb_h.status = CAM_REQ_INVALID;
                break;
        }

        xpt_done(ccb);
        return;
}

static void hpt_pci_intr(void *arg)
{       
        PVBUS_EXT vbus_ext = (PVBUS_EXT)arg;
        hpt_lock_vbus(vbus_ext);
        ldm_intr((PVBUS)vbus_ext->vbus);
        hpt_unlock_vbus(vbus_ext);
}

static void hpt_poll(struct cam_sim *sim)
{
        PVBUS_EXT vbus_ext = cam_sim_softc(sim);
        hpt_assert_vbus_locked(vbus_ext);
        ldm_intr((PVBUS)vbus_ext->vbus);
}

static void hpt_async(void * callback_arg, u_int32_t code, struct cam_path * path, void * arg)
{
        KdPrint(("hpt_async"));
}

static int hpt_shutdown(device_t dev)
{
        KdPrint(("hpt_shutdown(dev=%p)", dev));
        return 0;
}

static int hpt_detach(device_t dev)
{
        /* we don't allow the driver to be unloaded. */
        return EBUSY;
}

static void hpt_ioctl_done(struct _IOCTL_ARG *arg)
{
        arg->ioctl_cmnd = 0;
        wakeup(arg);
}

static void __hpt_do_ioctl(PVBUS_EXT vbus_ext, IOCTL_ARG *ioctl_args)
{
        ioctl_args->result = -1;
        ioctl_args->done = hpt_ioctl_done;
        ioctl_args->ioctl_cmnd = (void *)1;

        hpt_lock_vbus(vbus_ext);
        ldm_ioctl((PVBUS)vbus_ext->vbus, ioctl_args);

        while (ioctl_args->ioctl_cmnd) {
                if (hpt_sleep(vbus_ext, ioctl_args, PPAUSE, "hptctl", HPT_OSM_TIMEOUT)==0)
                        break;
                ldm_reset_vbus((PVBUS)vbus_ext->vbus);
                __hpt_do_tasks(vbus_ext);
        }

        /* KdPrint(("ioctl %x result %d", ioctl_args->dwIoControlCode, ioctl_args->result)); */

        hpt_unlock_vbus(vbus_ext);
}

static void hpt_do_ioctl(IOCTL_ARG *ioctl_args)
{
        PVBUS vbus;
        PVBUS_EXT vbus_ext;
        
        ldm_for_each_vbus(vbus, vbus_ext) {
                __hpt_do_ioctl(vbus_ext, ioctl_args);
                if (ioctl_args->result!=HPT_IOCTL_RESULT_WRONG_VBUS)
                        return;
        }
}

#define HPT_DO_IOCTL(code, inbuf, insize, outbuf, outsize) ({\
        IOCTL_ARG arg;\
        arg.dwIoControlCode = code;\
        arg.lpInBuffer = inbuf;\
        arg.lpOutBuffer = outbuf;\
        arg.nInBufferSize = insize;\
        arg.nOutBufferSize = outsize;\
        arg.lpBytesReturned = 0;\
        hpt_do_ioctl(&arg);\
        arg.result;\
})

#define DEVICEID_VALID(id) ((id) && ((HPT_U32)(id)!=0xffffffff))

static int hpt_get_logical_devices(DEVICEID * pIds, int nMaxCount)
{
        int i;
        HPT_U32 count = nMaxCount-1;
        
        if (HPT_DO_IOCTL(HPT_IOCTL_GET_LOGICAL_DEVICES,
                        &count, sizeof(HPT_U32), pIds, sizeof(DEVICEID)*nMaxCount))
                return -1;

        nMaxCount = (int)pIds[0];
        for (i=0; i<nMaxCount; i++) pIds[i] = pIds[i+1];
        return nMaxCount;
}

static int hpt_get_device_info_v3(DEVICEID id, PLOGICAL_DEVICE_INFO_V3 pInfo)
{
        return HPT_DO_IOCTL(HPT_IOCTL_GET_DEVICE_INFO_V3,
                                &id, sizeof(DEVICEID), pInfo, sizeof(LOGICAL_DEVICE_INFO_V3));
}

/* not belong to this file logically, but we want to use ioctl interface */
static int __hpt_stop_tasks(PVBUS_EXT vbus_ext, DEVICEID id)
{
        LOGICAL_DEVICE_INFO_V3 devinfo;
        int i, result;
        DEVICEID param[2] = { id, 0 };
        
        if (hpt_get_device_info_v3(id, &devinfo))
                return -1;
                
        if (devinfo.Type!=LDT_ARRAY)
                return -1;
                
        if (devinfo.u.array.Flags & ARRAY_FLAG_REBUILDING)
                param[1] = AS_REBUILD_ABORT;
        else if (devinfo.u.array.Flags & ARRAY_FLAG_VERIFYING)
                param[1] = AS_VERIFY_ABORT;
        else if (devinfo.u.array.Flags & ARRAY_FLAG_INITIALIZING)
                param[1] = AS_INITIALIZE_ABORT;
        else if (devinfo.u.array.Flags & ARRAY_FLAG_TRANSFORMING)
                param[1] = AS_TRANSFORM_ABORT;
        else
                return -1;

        KdPrint(("SET_ARRAY_STATE(%x, %d)", param[0], param[1]));
        result = HPT_DO_IOCTL(HPT_IOCTL_SET_ARRAY_STATE,
                                param, sizeof(param), 0, 0);
                                
        for (i=0; i<devinfo.u.array.nDisk; i++)
                if (DEVICEID_VALID(devinfo.u.array.Members[i]))
                        __hpt_stop_tasks(vbus_ext, devinfo.u.array.Members[i]);
                        
        return result;
}

static void hpt_stop_tasks(PVBUS_EXT vbus_ext)
{
        DEVICEID ids[32];
        int i, count;

        count = hpt_get_logical_devices((DEVICEID *)&ids, sizeof(ids)/sizeof(ids[0]));
        
        for (i=0; i<count; i++)
                __hpt_stop_tasks(vbus_ext, ids[i]);
}

static  d_open_t        hpt_open;
static  d_close_t       hpt_close;
static  d_ioctl_t       hpt_ioctl;
static  int             hpt_rescan_bus(void);

static struct cdevsw hpt_cdevsw = {
        .d_open =       hpt_open,
        .d_close =      hpt_close,
        .d_ioctl =      hpt_ioctl,
        .d_name =       driver_name,
        .d_version =    D_VERSION,
};

static struct intr_config_hook hpt_ich;

/*
 * hpt_final_init will be called after all hpt_attach.
 */
static void hpt_final_init(void *dummy)
{
        int       i;
        PVBUS_EXT vbus_ext;
        PVBUS vbus;
        PHBA hba;

        /* Clear the config hook */
        config_intrhook_disestablish(&hpt_ich);

        /* allocate memory */
        i = 0;
        ldm_for_each_vbus(vbus, vbus_ext) {
                if (hpt_alloc_mem(vbus_ext)) {
                        os_printk("out of memory");
                        return;
                }
                i++;
        }

        if (!i) {
                if (bootverbose)
                        os_printk("no controller detected.");
                return;
        }

        /* initializing hardware */
        ldm_for_each_vbus(vbus, vbus_ext) {
                /* make timer available here */
                mtx_init(&vbus_ext->lock, "hptsleeplock", NULL, MTX_DEF);
                callout_init_mtx(&vbus_ext->timer, &vbus_ext->lock, 0);
                if (hpt_init_vbus(vbus_ext)) {
                        os_printk("fail to initialize hardware");
                        break; /* FIXME */
                }
        }

        /* register CAM interface */
        ldm_for_each_vbus(vbus, vbus_ext) {
                struct cam_devq *devq;
                struct ccb_setasync     ccb;
                
                if (bus_dma_tag_create(NULL,/* parent */
                                4,      /* alignment */
                                BUS_SPACE_MAXADDR_32BIT+1, /* boundary */
                                BUS_SPACE_MAXADDR,      /* lowaddr */
                                BUS_SPACE_MAXADDR,      /* highaddr */
                                NULL, NULL,             /* filter, filterarg */
                                PAGE_SIZE * (os_max_sg_descriptors-1),  /* maxsize */
                                os_max_sg_descriptors,  /* nsegments */
                                0x10000,        /* maxsegsize */
                                BUS_DMA_WAITOK,         /* flags */
                                busdma_lock_mutex,      /* lockfunc */
                                &vbus_ext->lock,                /* lockfuncarg */
                                &vbus_ext->io_dmat      /* tag */))
                {
                        return ;
                }

                for (i=0; i<os_max_queue_comm; i++) {
                        POS_CMDEXT ext = (POS_CMDEXT)malloc(sizeof(OS_CMDEXT), M_DEVBUF, M_WAITOK);
                        ext->vbus_ext = vbus_ext;
                        ext->next = vbus_ext->cmdext_list;
                        vbus_ext->cmdext_list = ext;
        
                        if (bus_dmamap_create(vbus_ext->io_dmat, 0, &ext->dma_map)) {
                                os_printk("Can't create dma map(%d)", i);
                                return ;
                        }
                        callout_init_mtx(&ext->timeout, &vbus_ext->lock, 0);
                }

                if ((devq = cam_simq_alloc(os_max_queue_comm)) == NULL) {
                        os_printk("cam_simq_alloc failed");
                        return ;
                }

                vbus_ext->sim = cam_sim_alloc(hpt_action, hpt_poll, driver_name,
                                vbus_ext, 0, &vbus_ext->lock, os_max_queue_comm,
                                /*tagged*/8,  devq);
                                
                if (!vbus_ext->sim) {
                        os_printk("cam_sim_alloc failed");
                        cam_simq_free(devq);
                        return ;
                }

                hpt_lock_vbus(vbus_ext);
                if (xpt_bus_register(vbus_ext->sim, NULL, 0) != CAM_SUCCESS) {
                        os_printk("xpt_bus_register failed");
                        cam_sim_free(vbus_ext->sim, /*free devq*/ TRUE);
                        hpt_unlock_vbus(vbus_ext);
                        vbus_ext->sim = NULL;
                        return ;
                }
        
                if (xpt_create_path(&vbus_ext->path, /*periph */ NULL,
                                cam_sim_path(vbus_ext->sim), CAM_TARGET_WILDCARD,
                                CAM_LUN_WILDCARD) != CAM_REQ_CMP)
                {
                        os_printk("xpt_create_path failed");
                        xpt_bus_deregister(cam_sim_path(vbus_ext->sim));
                        cam_sim_free(vbus_ext->sim, /*free_devq*/TRUE);
                        hpt_unlock_vbus(vbus_ext);
                        vbus_ext->sim = NULL;
                        return ;
                }
                hpt_unlock_vbus(vbus_ext);

                memset(&ccb, 0, sizeof(ccb));
                xpt_setup_ccb(&ccb.ccb_h, vbus_ext->path, /*priority*/5);
                ccb.ccb_h.func_code = XPT_SASYNC_CB;
                ccb.event_enable = AC_LOST_DEVICE;
                ccb.callback = hpt_async;
                ccb.callback_arg = vbus_ext;
                xpt_action((union ccb *)&ccb);

                for (hba = vbus_ext->hba_list; hba; hba = hba->next) {
                        int rid = 0;
                        if ((hba->irq_res = bus_alloc_resource_any(hba->pcidev,
                                SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE)) == NULL)
                        {
                                os_printk("can't allocate interrupt");
                                return ;
                        }
                        
                        if (bus_setup_intr(hba->pcidev, hba->irq_res, INTR_TYPE_CAM | INTR_MPSAFE,
                                NULL, hpt_pci_intr, vbus_ext, &hba->irq_handle)) 
                        {
                                os_printk("can't set up interrupt");
                                return ;
                        }
                        hba->ldm_adapter.him->intr_control(hba->ldm_adapter.him_handle, HPT_TRUE);
                }

                vbus_ext->shutdown_eh = EVENTHANDLER_REGISTER(shutdown_final, 
                                                                        hpt_shutdown_vbus, vbus_ext, SHUTDOWN_PRI_DEFAULT);
                if (!vbus_ext->shutdown_eh)
                        os_printk("Shutdown event registration failed");
        }
        
        ldm_for_each_vbus(vbus, vbus_ext) {
                TASK_INIT(&vbus_ext->worker, 0, (task_fn_t *)hpt_do_tasks, vbus_ext);
                if (vbus_ext->tasks)
                        TASK_ENQUEUE(&vbus_ext->worker);
        }       

        make_dev(&hpt_cdevsw, DRIVER_MINOR, UID_ROOT, GID_OPERATOR,
            S_IRUSR | S_IWUSR, "%s", driver_name);
}

#if defined(KLD_MODULE)

typedef struct driverlink *driverlink_t;
struct driverlink {
        kobj_class_t    driver;
        TAILQ_ENTRY(driverlink) link;   /* list of drivers in devclass */
};

typedef TAILQ_HEAD(driver_list, driverlink) driver_list_t;

struct devclass {
        TAILQ_ENTRY(devclass) link;
        devclass_t      parent;         /* parent in devclass hierarchy */
        driver_list_t   drivers;     /* bus devclasses store drivers for bus */
        char            *name;
        device_t        *devices;       /* array of devices indexed by unit */
        int             maxunit;        /* size of devices array */
};

static void override_kernel_driver(void)
{
        driverlink_t dl, dlfirst;
        driver_t *tmpdriver;
        devclass_t dc = devclass_find("pci");
        
        if (dc){
                dlfirst = TAILQ_FIRST(&dc->drivers);
                for (dl = dlfirst; dl; dl = TAILQ_NEXT(dl, link)) {
                        if(strcmp(dl->driver->name, driver_name) == 0) {
                                tmpdriver=dl->driver;
                                dl->driver=dlfirst->driver;
                                dlfirst->driver=tmpdriver;
                                break;
                        }
                }
        }
}

#else 
#define override_kernel_driver()
#endif

static void hpt_init(void *dummy)
{
        if (bootverbose)
                os_printk("%s %s", driver_name_long, driver_ver);

        override_kernel_driver();
        init_config();

        hpt_ich.ich_func = hpt_final_init;
        hpt_ich.ich_arg = NULL;
        if (config_intrhook_establish(&hpt_ich) != 0) {
                printf("%s: cannot establish configuration hook\n",
                    driver_name_long);
        }

}
SYSINIT(hptinit, SI_SUB_CONFIGURE, SI_ORDER_FIRST, hpt_init, NULL);

/*
 * CAM driver interface
 */
static device_method_t driver_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         hpt_probe),
        DEVMETHOD(device_attach,        hpt_attach),
        DEVMETHOD(device_detach,        hpt_detach),
        DEVMETHOD(device_shutdown,      hpt_shutdown),
        DEVMETHOD_END
};

static driver_t hpt_pci_driver = {
        driver_name,
        driver_methods,
        sizeof(HBA)
};

#ifndef TARGETNAME
#error "no TARGETNAME found"
#endif

DRIVER_MODULE(TARGETNAME, pci, hpt_pci_driver, NULL, NULL);
MODULE_VERSION(TARGETNAME, 1);
MODULE_DEPEND(TARGETNAME, cam, 1, 1, 1);

static int hpt_open(struct cdev *dev, int flags, int devtype, struct thread *td)
{
        return 0;
}

static int hpt_close(struct cdev *dev, int flags, int devtype, struct thread *td)
{
        return 0;
}

static int hpt_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
{
        PHPT_IOCTL_PARAM piop=(PHPT_IOCTL_PARAM)data;
        IOCTL_ARG ioctl_args;
        HPT_U32 bytesReturned = 0;

        switch (cmd){
        case HPT_DO_IOCONTROL:
        {       
                if (piop->Magic == HPT_IOCTL_MAGIC || piop->Magic == HPT_IOCTL_MAGIC32) {
                        KdPrint(("ioctl=%x in=%p len=%d out=%p len=%d\n",
                                piop->dwIoControlCode,
                                piop->lpInBuffer,
                                piop->nInBufferSize,
                                piop->lpOutBuffer,
                                piop->nOutBufferSize));
                        
                memset(&ioctl_args, 0, sizeof(ioctl_args));
                
                ioctl_args.dwIoControlCode = piop->dwIoControlCode;
                ioctl_args.nInBufferSize = piop->nInBufferSize;
                ioctl_args.nOutBufferSize = piop->nOutBufferSize;
                ioctl_args.lpBytesReturned = &bytesReturned;

                if (ioctl_args.nInBufferSize) {
                        ioctl_args.lpInBuffer = malloc(ioctl_args.nInBufferSize, M_DEVBUF, M_WAITOK);
                        if (copyin((void*)piop->lpInBuffer,
                                        ioctl_args.lpInBuffer, piop->nInBufferSize))
                                goto invalid;
                }
        
                if (ioctl_args.nOutBufferSize)
                        ioctl_args.lpOutBuffer = malloc(ioctl_args.nOutBufferSize, M_DEVBUF, M_WAITOK | M_ZERO);

                hpt_do_ioctl(&ioctl_args);
        
                if (ioctl_args.result==HPT_IOCTL_RESULT_OK) {
                        if (piop->nOutBufferSize) {
                                if (copyout(ioctl_args.lpOutBuffer,
                                        (void*)piop->lpOutBuffer, piop->nOutBufferSize))
                                        goto invalid;
                        }
                        if (piop->lpBytesReturned) {
                                if (copyout(&bytesReturned,
                                        (void*)piop->lpBytesReturned, sizeof(HPT_U32)))
                                        goto invalid;
                        }
                        if (ioctl_args.lpInBuffer) free(ioctl_args.lpInBuffer, M_DEVBUF);
                        if (ioctl_args.lpOutBuffer) free(ioctl_args.lpOutBuffer, M_DEVBUF);
                        return 0;
                }
invalid:
                if (ioctl_args.lpInBuffer) free(ioctl_args.lpInBuffer, M_DEVBUF);
                if (ioctl_args.lpOutBuffer) free(ioctl_args.lpOutBuffer, M_DEVBUF);
                return EFAULT;
        }
        return EFAULT;
        }

        case HPT_SCAN_BUS:
        {
                return hpt_rescan_bus();
        }
        default:
                KdPrint(("invalid command!"));
                return EFAULT;
        }       

}

static int      hpt_rescan_bus(void)
{
        union ccb                       *ccb;
        PVBUS                           vbus;
        PVBUS_EXT                       vbus_ext;       
                
        ldm_for_each_vbus(vbus, vbus_ext) {
                if ((ccb = xpt_alloc_ccb()) == NULL)
                        return(ENOMEM);
                if (xpt_create_path(&ccb->ccb_h.path, NULL,
                    cam_sim_path(vbus_ext->sim),
                    CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
                        xpt_free_ccb(ccb);
                        return(EIO);
                }
                xpt_rescan(ccb);
        }
        
        return(0);      
}