io/pcplusmp/apic_introp.c

	apic_introp.c revision 86a9c507121ec77a92601d8844a5ca82373cd4aa
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * apic_introp.c:
 *  Has code for Advanced DDI interrupt framework support.
 */

#include <sys/cpuvar.h>
#include <sys/psm.h>
#include <sys/archsystm.h>
#include <sys/apic.h>
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/mach_intr.h>
#include <sys/sysmacros.h>
#include <sys/trap.h>
#include <sys/pci.h>
#include <sys/pci_intr_lib.h>

extern struct av_head autovect[];

/*
 *  Local Function Prototypes
 */
apic_irq_t  *apic_find_irq(dev_info_t *, struct intrspec *, int);

/*
 * MSI support flag:
 * reflects whether MSI is supported at APIC level
 * it can also be patched through /etc/system
 *
 *  0 = default value - don't know and need to call apic_check_msi_support()
 *      to find out then set it accordingly
 *  1 = supported
 * -1 = not supported
 */
int apic_support_msi = 0;

/* Multiple vector support for MSI */
int apic_multi_msi_enable = 1;

/* Multiple vector support for MSI-X */
int apic_msix_enable = 1;

/*
 * apic_pci_msi_enable_vector:
 *  Set the address/data fields in the MSI/X capability structure
 *  XXX: MSI-X support
 */
/* ARGSUSED */
void
apic_pci_msi_enable_vector(apic_irq_t *irq_ptr, int type, int inum, int vector,
    int count, int target_apic_id)
{
    uint64_t        msi_addr, msi_data;
    ushort_t        msi_ctrl;
    dev_info_t      *dip = irq_ptr->airq_dip;
    int         cap_ptr = i_ddi_get_msi_msix_cap_ptr(dip);
    ddi_acc_handle_t    handle = i_ddi_get_pci_config_handle(dip);
#if !defined(__xpv)
    msi_regs_t      msi_regs;
#endif  /* ! __xpv */

    DDI_INTR_IMPLDBG((CE_CONT, "apic_pci_msi_enable_vector: dip=0x%p\n"
        "\tdriver = %s, inum=0x%x vector=0x%x apicid=0x%x\n", (void *)dip,
        ddi_driver_name(dip), inum, vector, target_apic_id));

    ASSERT((handle != NULL) && (cap_ptr != 0));

#if !defined(__xpv)
    msi_regs.mr_data = vector;
    msi_regs.mr_addr = target_apic_id;

    apic_vt_ops->apic_intrr_alloc_entry(irq_ptr);
    apic_vt_ops->apic_intrr_map_entry(irq_ptr, (void *)&msi_regs);
    apic_vt_ops->apic_intrr_record_msi(irq_ptr, &msi_regs);

    /* MSI Address */
    msi_addr = msi_regs.mr_addr;

    /* MSI Data: MSI is edge triggered according to spec */
    msi_data = msi_regs.mr_data;
#else
    /* MSI Address */
    msi_addr = (MSI_ADDR_HDR |
        (target_apic_id << MSI_ADDR_DEST_SHIFT));
    msi_addr |= ((MSI_ADDR_RH_FIXED << MSI_ADDR_RH_SHIFT) |
        (MSI_ADDR_DM_PHYSICAL << MSI_ADDR_DM_SHIFT));

    /* MSI Data: MSI is edge triggered according to spec */
    msi_data = ((MSI_DATA_TM_EDGE << MSI_DATA_TM_SHIFT) | vector);
#endif  /* ! __xpv */

    DDI_INTR_IMPLDBG((CE_CONT, "apic_pci_msi_enable_vector: addr=0x%lx "
        "data=0x%lx\n", (long)msi_addr, (long)msi_data));

    if (type == DDI_INTR_TYPE_MSI) {
        msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL);

        /* Set the bits to inform how many MSIs are enabled */
        msi_ctrl |= ((highbit(count) -1) << PCI_MSI_MME_SHIFT);
        pci_config_put16(handle, cap_ptr + PCI_MSI_CTRL, msi_ctrl);

#if !defined(__xpv)
        /*
         * Only set vector if not on hypervisor
         */
        pci_config_put32(handle,
            cap_ptr + PCI_MSI_ADDR_OFFSET, msi_addr);

        if (msi_ctrl &  PCI_MSI_64BIT_MASK) {
            pci_config_put32(handle,
                cap_ptr + PCI_MSI_ADDR_OFFSET + 4, msi_addr >> 32);
            pci_config_put16(handle,
                cap_ptr + PCI_MSI_64BIT_DATA, msi_data);
        } else {
            pci_config_put16(handle,
                cap_ptr + PCI_MSI_32BIT_DATA, msi_data);
        }

    } else if (type == DDI_INTR_TYPE_MSIX) {
        uintptr_t   off;
        ddi_intr_msix_t *msix_p = i_ddi_get_msix(dip);

        ASSERT(msix_p != NULL);

        /* Offset into the "inum"th entry in the MSI-X table */
        off = (uintptr_t)msix_p->msix_tbl_addr +
            (inum  * PCI_MSIX_VECTOR_SIZE);

        ddi_put32(msix_p->msix_tbl_hdl,
            (uint32_t *)(off + PCI_MSIX_DATA_OFFSET), msi_data);
        ddi_put64(msix_p->msix_tbl_hdl,
            (uint64_t *)(off + PCI_MSIX_LOWER_ADDR_OFFSET), msi_addr);
#endif  /* ! __xpv */
    }
}


#if !defined(__xpv)

/*
 * This function returns the no. of vectors available for the pri.
 * dip is not used at this moment.  If we really don't need that,
 * it will be removed.
 */
/*ARGSUSED*/
int
apic_navail_vector(dev_info_t *dip, int pri)
{
    int lowest, highest, i, navail, count;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_navail_vector: dip: %p, pri: %x\n",
        (void *)dip, pri));

    highest = apic_ipltopri[pri] + APIC_VECTOR_MASK;
    lowest = apic_ipltopri[pri - 1] + APIC_VECTOR_PER_IPL;
    navail = count = 0;

    if (highest < lowest) /* Both ipl and ipl - 1 map to same pri */
        lowest -= APIC_VECTOR_PER_IPL;

    /* It has to be contiguous */
    for (i = lowest; i < highest; i++) {
        count = 0;
        while ((apic_vector_to_irq[i] == APIC_RESV_IRQ) &&
            (i < highest)) {
            if (APIC_CHECK_RESERVE_VECTORS(i))
                break;
            count++;
            i++;
        }
        if (count > navail)
            navail = count;
    }
    return (navail);
}

#endif  /* ! __xpv */

/*
 * Finds "count" contiguous MSI vectors starting at the proper alignment
 * at "pri".
 * Caller needs to make sure that count has to be power of 2 and should not
 * be < 1.
 */
uchar_t
apic_find_multi_vectors(int pri, int count)
{
    int lowest, highest, i, navail, start, msibits;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_find_mult: pri: %x, count: %x\n",
        pri, count));

    highest = apic_ipltopri[pri] + APIC_VECTOR_MASK;
    lowest = apic_ipltopri[pri - 1] + APIC_VECTOR_PER_IPL;
    navail = 0;

    if (highest < lowest) /* Both ipl and ipl - 1 map to same pri */
        lowest -= APIC_VECTOR_PER_IPL;

    /*
     * msibits is the no. of lower order message data bits for the
     * allocated MSI vectors and is used to calculate the aligned
     * starting vector
     */
    msibits = count - 1;

    /* It has to be contiguous */
    for (i = lowest; i < highest; i++) {
        navail = 0;

        /*
         * starting vector has to be aligned accordingly for
         * multiple MSIs
         */
        if (msibits)
            i = (i + msibits) & ~msibits;
        start = i;
        while ((apic_vector_to_irq[i] == APIC_RESV_IRQ) &&
            (i < highest)) {
            if (APIC_CHECK_RESERVE_VECTORS(i))
                break;
            navail++;
            if (navail >= count)
                return (start);
            i++;
        }
    }
    return (0);
}


/*
 * It finds the apic_irq_t associates with the dip, ispec and type.
 */
apic_irq_t *
apic_find_irq(dev_info_t *dip, struct intrspec *ispec, int type)
{
    apic_irq_t  *irqp;
    int i;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_find_irq: dip=0x%p vec=0x%x "
        "ipl=0x%x type=0x%x\n", (void *)dip, ispec->intrspec_vec,
        ispec->intrspec_pri, type));

    for (i = apic_min_device_irq; i <= apic_max_device_irq; i++) {
        for (irqp = apic_irq_table[i]; irqp; irqp = irqp->airq_next) {
            if ((irqp->airq_dip == dip) &&
                (irqp->airq_origirq == ispec->intrspec_vec) &&
                (irqp->airq_ipl == ispec->intrspec_pri)) {
                if (type == DDI_INTR_TYPE_MSI) {
                    if (irqp->airq_mps_intr_index ==
                        MSI_INDEX)
                        return (irqp);
                } else if (type == DDI_INTR_TYPE_MSIX) {
                    if (irqp->airq_mps_intr_index ==
                        MSIX_INDEX)
                        return (irqp);
                } else
                    return (irqp);
            }
        }
    }
    DDI_INTR_IMPLDBG((CE_CONT, "apic_find_irq: return NULL\n"));
    return (NULL);
}


#if !defined(__xpv)

/*
 * This function will return the pending bit of the irqp.
 * It either comes from the IRR register of the APIC or the RDT
 * entry of the I/O APIC.
 * For the IRR to work, it needs to be to its binding CPU
 */
static int
apic_get_pending(apic_irq_t *irqp, int type)
{
    int         bit, index, irr, pending;
    int         intin_no;
    int         apic_ix;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_get_pending: irqp: %p, cpuid: %x "
        "type: %x\n", (void *)irqp, irqp->airq_cpu & ~IRQ_USER_BOUND,
        type));

    /* need to get on the bound cpu */
    mutex_enter(&cpu_lock);
    affinity_set(irqp->airq_cpu & ~IRQ_USER_BOUND);

    index = irqp->airq_vector / 32;
    bit = irqp->airq_vector % 32;
    irr = apic_reg_ops->apic_read(APIC_IRR_REG + index);

    affinity_clear();
    mutex_exit(&cpu_lock);

    pending = (irr & (1 << bit)) ? 1 : 0;
    if (!pending && (type == DDI_INTR_TYPE_FIXED)) {
        /* check I/O APIC for fixed interrupt */
        intin_no = irqp->airq_intin_no;
        apic_ix = irqp->airq_ioapicindex;
        pending = (READ_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_no) &
            AV_PENDING) ? 1 : 0;
    }
    return (pending);
}


/*
 * This function will clear the mask for the interrupt on the I/O APIC
 */
static void
apic_clear_mask(apic_irq_t *irqp)
{
    int         intin_no;
    ulong_t         iflag;
    int32_t         rdt_entry;
    int             apic_ix;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_clear_mask: irqp: %p\n",
        (void *)irqp));

    intin_no = irqp->airq_intin_no;
    apic_ix = irqp->airq_ioapicindex;

    iflag = intr_clear();
    lock_set(&apic_ioapic_lock);

    rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_no);

    /* clear mask */
    WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_no,
        ((~AV_MASK) & rdt_entry));

    lock_clear(&apic_ioapic_lock);
    intr_restore(iflag);
}


/*
 * This function will mask the interrupt on the I/O APIC
 */
static void
apic_set_mask(apic_irq_t *irqp)
{
    int         intin_no;
    int             apic_ix;
    ulong_t         iflag;
    int32_t         rdt_entry;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_set_mask: irqp: %p\n", (void *)irqp));

    intin_no = irqp->airq_intin_no;
    apic_ix = irqp->airq_ioapicindex;

    iflag = intr_clear();

    lock_set(&apic_ioapic_lock);

    rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_no);

    /* mask it */
    WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(apic_ix, intin_no,
        (AV_MASK | rdt_entry));

    lock_clear(&apic_ioapic_lock);
    intr_restore(iflag);
}


void
apic_free_vectors(dev_info_t *dip, int inum, int count, int pri, int type)
{
    int i;
    apic_irq_t *irqptr;
    struct intrspec ispec;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_free_vectors: dip: %p inum: %x "
        "count: %x pri: %x type: %x\n",
        (void *)dip, inum, count, pri, type));

    /* for MSI/X only */
    if (!DDI_INTR_IS_MSI_OR_MSIX(type))
        return;

    for (i = 0; i < count; i++) {
        DDI_INTR_IMPLDBG((CE_CONT, "apic_free_vectors: inum=0x%x "
            "pri=0x%x count=0x%x\n", inum, pri, count));
        ispec.intrspec_vec = inum + i;
        ispec.intrspec_pri = pri;
        if ((irqptr = apic_find_irq(dip, &ispec, type)) == NULL) {
            DDI_INTR_IMPLDBG((CE_CONT, "apic_free_vectors: "
                "dip=0x%p inum=0x%x pri=0x%x apic_find_irq() "
                "failed\n", (void *)dip, inum, pri));
            continue;
        }
        irqptr->airq_mps_intr_index = FREE_INDEX;
        apic_vector_to_irq[irqptr->airq_vector] = APIC_RESV_IRQ;
    }
}

#endif  /* ! __xpv */

/*
 * check whether the system supports MSI
 *
 * If PCI-E capability is found, then this must be a PCI-E system.
 * Since MSI is required for PCI-E system, it returns PSM_SUCCESS
 * to indicate this system supports MSI.
 */
int
apic_check_msi_support()
{
    dev_info_t *cdip;
    char dev_type[16];
    int dev_len;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_check_msi_support:\n"));

    /*
     * check whether the first level children of root_node have
     * PCI-E capability
     */
    for (cdip = ddi_get_child(ddi_root_node()); cdip != NULL;
        cdip = ddi_get_next_sibling(cdip)) {

        DDI_INTR_IMPLDBG((CE_CONT, "apic_check_msi_support: cdip: 0x%p,"
            " driver: %s, binding: %s, nodename: %s\n", (void *)cdip,
            ddi_driver_name(cdip), ddi_binding_name(cdip),
            ddi_node_name(cdip)));
        dev_len = sizeof (dev_type);
        if (ddi_getlongprop_buf(DDI_DEV_T_ANY, cdip, DDI_PROP_DONTPASS,
            "device_type", (caddr_t)dev_type, &dev_len)
            != DDI_PROP_SUCCESS)
            continue;
        if (strcmp(dev_type, "pciex") == 0)
            return (PSM_SUCCESS);
    }

    /* MSI is not supported on this system */
    DDI_INTR_IMPLDBG((CE_CONT, "apic_check_msi_support: no 'pciex' "
        "device_type found\n"));
    return (PSM_FAILURE);
}

#if !defined(__xpv)

/*
 * apic_pci_msi_unconfigure:
 *
 * This and next two interfaces are copied from pci_intr_lib.c
 * Do ensure that these two files stay in sync.
 * These needed to be copied over here to avoid a deadlock situation on
 * certain mp systems that use MSI interrupts.
 *
 * IMPORTANT regards next three interfaces:
 * i) are called only for MSI/X interrupts.
 * ii) called with interrupts disabled, and must not block
 */
void
apic_pci_msi_unconfigure(dev_info_t *rdip, int type, int inum)
{
    ushort_t        msi_ctrl;
    int         cap_ptr = i_ddi_get_msi_msix_cap_ptr(rdip);
    ddi_acc_handle_t    handle = i_ddi_get_pci_config_handle(rdip);

    ASSERT((handle != NULL) && (cap_ptr != 0));

    if (type == DDI_INTR_TYPE_MSI) {
        msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL);
        msi_ctrl &= (~PCI_MSI_MME_MASK);
        pci_config_put16(handle, cap_ptr + PCI_MSI_CTRL, msi_ctrl);
        pci_config_put32(handle, cap_ptr + PCI_MSI_ADDR_OFFSET, 0);

        if (msi_ctrl &  PCI_MSI_64BIT_MASK) {
            pci_config_put16(handle,
                cap_ptr + PCI_MSI_64BIT_DATA, 0);
            pci_config_put32(handle,
                cap_ptr + PCI_MSI_ADDR_OFFSET + 4, 0);
        } else {
            pci_config_put16(handle,
                cap_ptr + PCI_MSI_32BIT_DATA, 0);
        }

    } else if (type == DDI_INTR_TYPE_MSIX) {
        uintptr_t   off;
        uint32_t    mask;
        ddi_intr_msix_t *msix_p = i_ddi_get_msix(rdip);

        ASSERT(msix_p != NULL);

        /* Offset into "inum"th entry in the MSI-X table & mask it */
        off = (uintptr_t)msix_p->msix_tbl_addr + (inum *
            PCI_MSIX_VECTOR_SIZE) + PCI_MSIX_VECTOR_CTRL_OFFSET;

        mask = ddi_get32(msix_p->msix_tbl_hdl, (uint32_t *)off);

        ddi_put32(msix_p->msix_tbl_hdl, (uint32_t *)off, (mask | 1));

        /* Offset into the "inum"th entry in the MSI-X table */
        off = (uintptr_t)msix_p->msix_tbl_addr +
            (inum * PCI_MSIX_VECTOR_SIZE);

        /* Reset the "data" and "addr" bits */
        ddi_put32(msix_p->msix_tbl_hdl,
            (uint32_t *)(off + PCI_MSIX_DATA_OFFSET), 0);
        ddi_put64(msix_p->msix_tbl_hdl, (uint64_t *)off, 0);
    }
}

#endif  /* __xpv */

/*
 * apic_pci_msi_enable_mode:
 */
void
apic_pci_msi_enable_mode(dev_info_t *rdip, int type, int inum)
{
    ushort_t        msi_ctrl;
    int         cap_ptr = i_ddi_get_msi_msix_cap_ptr(rdip);
    ddi_acc_handle_t    handle = i_ddi_get_pci_config_handle(rdip);

    ASSERT((handle != NULL) && (cap_ptr != 0));

    if (type == DDI_INTR_TYPE_MSI) {
        msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL);
        if ((msi_ctrl & PCI_MSI_ENABLE_BIT))
            return;

        msi_ctrl |= PCI_MSI_ENABLE_BIT;
        pci_config_put16(handle, cap_ptr + PCI_MSI_CTRL, msi_ctrl);

    } else if (type == DDI_INTR_TYPE_MSIX) {
        uintptr_t   off;
        uint32_t    mask;
        ddi_intr_msix_t *msix_p;

        msix_p = i_ddi_get_msix(rdip);

        ASSERT(msix_p != NULL);

        /* Offset into "inum"th entry in the MSI-X table & clear mask */
        off = (uintptr_t)msix_p->msix_tbl_addr + (inum *
            PCI_MSIX_VECTOR_SIZE) + PCI_MSIX_VECTOR_CTRL_OFFSET;

        mask = ddi_get32(msix_p->msix_tbl_hdl, (uint32_t *)off);

        ddi_put32(msix_p->msix_tbl_hdl, (uint32_t *)off, (mask & ~1));

        msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSIX_CTRL);

        if (!(msi_ctrl & PCI_MSIX_ENABLE_BIT)) {
            msi_ctrl |= PCI_MSIX_ENABLE_BIT;
            pci_config_put16(handle, cap_ptr + PCI_MSIX_CTRL,
                msi_ctrl);
        }
    }
}

/*
 * apic_pci_msi_disable_mode:
 */
void
apic_pci_msi_disable_mode(dev_info_t *rdip, int type)
{
    ushort_t        msi_ctrl;
    int         cap_ptr = i_ddi_get_msi_msix_cap_ptr(rdip);
    ddi_acc_handle_t    handle = i_ddi_get_pci_config_handle(rdip);

    ASSERT((handle != NULL) && (cap_ptr != 0));

    if (type == DDI_INTR_TYPE_MSI) {
        msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL);
        if (!(msi_ctrl & PCI_MSI_ENABLE_BIT))
            return;

        msi_ctrl &= ~PCI_MSI_ENABLE_BIT;    /* MSI disable */
        pci_config_put16(handle, cap_ptr + PCI_MSI_CTRL, msi_ctrl);

    } else if (type == DDI_INTR_TYPE_MSIX) {
        msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSIX_CTRL);
        if (msi_ctrl & PCI_MSIX_ENABLE_BIT) {
            msi_ctrl &= ~PCI_MSIX_ENABLE_BIT;
            pci_config_put16(handle, cap_ptr + PCI_MSIX_CTRL,
                msi_ctrl);
        }
    }
}

#if !defined(__xpv)

static int
apic_set_cpu(int irqno, int cpu, int *result)
{
    apic_irq_t *irqp;
    ulong_t iflag;
    int ret;

    DDI_INTR_IMPLDBG((CE_CONT, "APIC_SET_CPU\n"));

    mutex_enter(&airq_mutex);
    irqp = apic_irq_table[irqno];
    mutex_exit(&airq_mutex);

    if (irqp == NULL) {
        *result = ENXIO;
        return (PSM_FAILURE);
    }

    /* Fail if this is an MSI intr and is part of a group. */
    if ((irqp->airq_mps_intr_index == MSI_INDEX) &&
        (irqp->airq_intin_no > 1)) {
        *result = ENXIO;
        return (PSM_FAILURE);
    }

    iflag = intr_clear();
    lock_set(&apic_ioapic_lock);

    ret = apic_rebind_all(irqp, cpu);

    lock_clear(&apic_ioapic_lock);
    intr_restore(iflag);

    if (ret) {
        *result = EIO;
        return (PSM_FAILURE);
    }
    /*
     * keep tracking the default interrupt cpu binding
     */
    irqp->airq_cpu = cpu;

    *result = 0;
    return (PSM_SUCCESS);
}

static int
apic_grp_set_cpu(int irqno, int new_cpu, int *result)
{
    dev_info_t *orig_dip;
    uint32_t orig_cpu;
    ulong_t iflag;
    apic_irq_t *irqps[PCI_MSI_MAX_INTRS];
    int i;
    int cap_ptr;
    int msi_mask_off;
    ushort_t msi_ctrl;
    uint32_t msi_pvm;
    ddi_acc_handle_t handle;
    int num_vectors = 0;
    uint32_t vector;

    DDI_INTR_IMPLDBG((CE_CONT, "APIC_GRP_SET_CPU\n"));

    /*
     * Take mutex to insure that table doesn't change out from underneath
     * us while we're playing with it.
     */
    mutex_enter(&airq_mutex);
    irqps[0] = apic_irq_table[irqno];
    orig_cpu = irqps[0]->airq_temp_cpu;
    orig_dip = irqps[0]->airq_dip;
    num_vectors = irqps[0]->airq_intin_no;
    vector = irqps[0]->airq_vector;

    /* A "group" of 1 */
    if (num_vectors == 1) {
        mutex_exit(&airq_mutex);
        return (apic_set_cpu(irqno, new_cpu, result));
    }

    *result = ENXIO;

    if (irqps[0]->airq_mps_intr_index != MSI_INDEX) {
        mutex_exit(&airq_mutex);
        DDI_INTR_IMPLDBG((CE_CONT, "set_grp: intr not MSI\n"));
        goto set_grp_intr_done;
    }
    if ((num_vectors < 1) || ((num_vectors - 1) & vector)) {
        mutex_exit(&airq_mutex);
        DDI_INTR_IMPLDBG((CE_CONT,
            "set_grp: base vec not part of a grp or not aligned: "
            "vec:0x%x, num_vec:0x%x\n", vector, num_vectors));
        goto set_grp_intr_done;
    }
    DDI_INTR_IMPLDBG((CE_CONT, "set_grp: num intrs in grp: %d\n",
        num_vectors));

    ASSERT((num_vectors + vector) < APIC_MAX_VECTOR);

    *result = EIO;

    /*
     * All IRQ entries in the table for the given device will be not
     * shared.  Since they are not shared, the dip in the table will
     * be true to the device of interest.
     */
    for (i = 1; i < num_vectors; i++) {
        irqps[i] = apic_irq_table[apic_vector_to_irq[vector + i]];
        if (irqps[i] == NULL) {
            mutex_exit(&airq_mutex);
            goto set_grp_intr_done;
        }
#ifdef DEBUG
        /* Sanity check: CPU and dip is the same for all entries. */
        if ((irqps[i]->airq_dip != orig_dip) ||
            (irqps[i]->airq_temp_cpu != orig_cpu)) {
            mutex_exit(&airq_mutex);
            DDI_INTR_IMPLDBG((CE_CONT,
                "set_grp: cpu or dip for vec 0x%x difft than for "
                "vec 0x%x\n", vector, vector + i));
            DDI_INTR_IMPLDBG((CE_CONT,
                "  cpu: %d vs %d, dip: 0x%p vs 0x%p\n", orig_cpu,
                irqps[i]->airq_temp_cpu, (void *)orig_dip,
                (void *)irqps[i]->airq_dip));
            goto set_grp_intr_done;
        }
#endif /* DEBUG */
    }
    mutex_exit(&airq_mutex);

    cap_ptr = i_ddi_get_msi_msix_cap_ptr(orig_dip);
    handle = i_ddi_get_pci_config_handle(orig_dip);
    msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL);

    /* MSI Per vector masking is supported. */
    if (msi_ctrl & PCI_MSI_PVM_MASK) {
        if (msi_ctrl &  PCI_MSI_64BIT_MASK)
            msi_mask_off = cap_ptr + PCI_MSI_64BIT_MASKBITS;
        else
            msi_mask_off = cap_ptr + PCI_MSI_32BIT_MASK;
        msi_pvm = pci_config_get32(handle, msi_mask_off);
        pci_config_put32(handle, msi_mask_off, (uint32_t)-1);
        DDI_INTR_IMPLDBG((CE_CONT,
            "set_grp: pvm supported.  Mask set to 0x%x\n",
            pci_config_get32(handle, msi_mask_off)));
    }

    iflag = intr_clear();
    lock_set(&apic_ioapic_lock);

    /*
     * Do the first rebind and check for errors.  Apic_rebind_all returns
     * an error if the CPU is not accepting interrupts.  If the first one
     * succeeds they all will.
     */
    if (apic_rebind_all(irqps[0], new_cpu))
        (void) apic_rebind_all(irqps[0], orig_cpu);
    else {
        irqps[0]->airq_cpu = new_cpu;

        for (i = 1; i < num_vectors; i++) {
            (void) apic_rebind_all(irqps[i], new_cpu);
            irqps[i]->airq_cpu = new_cpu;
        }
        *result = 0;    /* SUCCESS */
    }

    lock_clear(&apic_ioapic_lock);
    intr_restore(iflag);

    /* Reenable vectors if per vector masking is supported. */
    if (msi_ctrl & PCI_MSI_PVM_MASK) {
        pci_config_put32(handle, msi_mask_off, msi_pvm);
        DDI_INTR_IMPLDBG((CE_CONT,
            "set_grp: pvm supported.  Mask restored to 0x%x\n",
            pci_config_get32(handle, msi_mask_off)));
    }

set_grp_intr_done:
    if (*result != 0)
        return (PSM_FAILURE);

    return (PSM_SUCCESS);
}

#else   /* __xpv */

/*
 * We let the hypervisor deal with msi configutation
 * so just stub this out.
 */

/* ARGSUSED */
void
apic_pci_msi_unconfigure(dev_info_t *rdip, int type, int inum)
{
}

#endif  /* __xpv */

int
apic_get_vector_intr_info(int vecirq, apic_get_intr_t *intr_params_p)
{
    struct autovec *av_dev;
    uchar_t irqno;
    int i;
    apic_irq_t *irq_p;

    /* Sanity check the vector/irq argument. */
    ASSERT((vecirq >= 0) || (vecirq <= APIC_MAX_VECTOR));

    mutex_enter(&airq_mutex);

    /*
     * Convert the vecirq arg to an irq using vector_to_irq table
     * if the arg is a vector.  Pass thru if already an irq.
     */
    if ((intr_params_p->avgi_req_flags & PSMGI_INTRBY_FLAGS) ==
        PSMGI_INTRBY_VEC)
        irqno = apic_vector_to_irq[vecirq];
    else
        irqno = vecirq;

    irq_p = apic_irq_table[irqno];

    if ((irq_p == NULL) ||
        (irq_p->airq_temp_cpu == IRQ_UNBOUND) ||
        (irq_p->airq_temp_cpu == IRQ_UNINIT)) {
        mutex_exit(&airq_mutex);
        return (PSM_FAILURE);
    }

    if (intr_params_p->avgi_req_flags & PSMGI_REQ_CPUID) {

        /* Get the (temp) cpu from apic_irq table, indexed by irq. */
        intr_params_p->avgi_cpu_id = irq_p->airq_temp_cpu;

        /* Return user bound info for intrd. */
        if (intr_params_p->avgi_cpu_id & IRQ_USER_BOUND) {
            intr_params_p->avgi_cpu_id &= ~IRQ_USER_BOUND;
            intr_params_p->avgi_cpu_id |= PSMGI_CPU_USER_BOUND;
        }
    }

    if (intr_params_p->avgi_req_flags & PSMGI_REQ_VECTOR)
        intr_params_p->avgi_vector = irq_p->airq_vector;

    if (intr_params_p->avgi_req_flags &
        (PSMGI_REQ_NUM_DEVS | PSMGI_REQ_GET_DEVS))
        /* Get number of devices from apic_irq table shared field. */
        intr_params_p->avgi_num_devs = irq_p->airq_share;

    if (intr_params_p->avgi_req_flags &  PSMGI_REQ_GET_DEVS) {

        intr_params_p->avgi_req_flags  |= PSMGI_REQ_NUM_DEVS;

        /* Some devices have NULL dip.  Don't count these. */
        if (intr_params_p->avgi_num_devs > 0) {
            for (i = 0, av_dev = autovect[irqno].avh_link;
                av_dev; av_dev = av_dev->av_link)
                if (av_dev->av_vector && av_dev->av_dip)
                    i++;
            intr_params_p->avgi_num_devs =
                MIN(intr_params_p->avgi_num_devs, i);
        }

        /* There are no viable dips to return. */
        if (intr_params_p->avgi_num_devs == 0)
            intr_params_p->avgi_dip_list = NULL;

        else {  /* Return list of dips */

            /* Allocate space in array for that number of devs. */
            intr_params_p->avgi_dip_list = kmem_zalloc(
                intr_params_p->avgi_num_devs *
                sizeof (dev_info_t *),
                KM_SLEEP);

            /*
             * Loop through the device list of the autovec table
             * filling in the dip array.
             *
             * Note that the autovect table may have some special
             * entries which contain NULL dips.  These will be
             * ignored.
             */
            for (i = 0, av_dev = autovect[irqno].avh_link;
                av_dev; av_dev = av_dev->av_link)
                if (av_dev->av_vector && av_dev->av_dip)
                    intr_params_p->avgi_dip_list[i++] =
                        av_dev->av_dip;
        }
    }

    mutex_exit(&airq_mutex);

    return (PSM_SUCCESS);
}


#if !defined(__xpv)

/*
 * This function provides external interface to the nexus for all
 * functionalities related to the new DDI interrupt framework.
 *
 * Input:
 * dip     - pointer to the dev_info structure of the requested device
 * hdlp    - pointer to the internal interrupt handle structure for the
 *       requested interrupt
 * intr_op - opcode for this call
 * result  - pointer to the integer that will hold the result to be
 *       passed back if return value is PSM_SUCCESS
 *
 * Output:
 * return value is either PSM_SUCCESS or PSM_FAILURE
 */
int
apic_intr_ops(dev_info_t *dip, ddi_intr_handle_impl_t *hdlp,
    psm_intr_op_t intr_op, int *result)
{
    int     cap;
    int     count_vec;
    int     old_priority;
    int     new_priority;
    int     new_cpu;
    apic_irq_t  *irqp;
    struct intrspec *ispec, intr_spec;

    DDI_INTR_IMPLDBG((CE_CONT, "apic_intr_ops: dip: %p hdlp: %p "
        "intr_op: %x\n", (void *)dip, (void *)hdlp, intr_op));

    ispec = &intr_spec;
    ispec->intrspec_pri = hdlp->ih_pri;
    ispec->intrspec_vec = hdlp->ih_inum;
    ispec->intrspec_func = hdlp->ih_cb_func;

    switch (intr_op) {
    case PSM_INTR_OP_CHECK_MSI:
        /*
         * Check MSI/X is supported or not at APIC level and
         * masked off the MSI/X bits in hdlp->ih_type if not
         * supported before return.  If MSI/X is supported,
         * leave the ih_type unchanged and return.
         *
         * hdlp->ih_type passed in from the nexus has all the
         * interrupt types supported by the device.
         */
        if (apic_support_msi == 0) {
            /*
             * if apic_support_msi is not set, call
             * apic_check_msi_support() to check whether msi
             * is supported first
             */
            if (apic_check_msi_support() == PSM_SUCCESS)
                apic_support_msi = 1;
            else
                apic_support_msi = -1;
        }
        if (apic_support_msi == 1) {
            if (apic_msix_enable)
                *result = hdlp->ih_type;
            else
                *result = hdlp->ih_type & ~DDI_INTR_TYPE_MSIX;
        } else
            *result = hdlp->ih_type & ~(DDI_INTR_TYPE_MSI |
                DDI_INTR_TYPE_MSIX);
        break;
    case PSM_INTR_OP_ALLOC_VECTORS:
        if (hdlp->ih_type == DDI_INTR_TYPE_MSI)
            *result = apic_alloc_msi_vectors(dip, hdlp->ih_inum,
                hdlp->ih_scratch1, hdlp->ih_pri,
                (int)(uintptr_t)hdlp->ih_scratch2);
        else
            *result = apic_alloc_msix_vectors(dip, hdlp->ih_inum,
                hdlp->ih_scratch1, hdlp->ih_pri,
                (int)(uintptr_t)hdlp->ih_scratch2);
        break;
    case PSM_INTR_OP_FREE_VECTORS:
        apic_free_vectors(dip, hdlp->ih_inum, hdlp->ih_scratch1,
            hdlp->ih_pri, hdlp->ih_type);
        break;
    case PSM_INTR_OP_NAVAIL_VECTORS:
        *result = apic_navail_vector(dip, hdlp->ih_pri);
        break;
    case PSM_INTR_OP_XLATE_VECTOR:
        ispec = ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp;
        *result = apic_introp_xlate(dip, ispec, hdlp->ih_type);
        if (*result == -1)
            return (PSM_FAILURE);
        break;
    case PSM_INTR_OP_GET_PENDING:
        if ((irqp = apic_find_irq(dip, ispec, hdlp->ih_type)) == NULL)
            return (PSM_FAILURE);
        *result = apic_get_pending(irqp, hdlp->ih_type);
        break;
    case PSM_INTR_OP_CLEAR_MASK:
        if (hdlp->ih_type != DDI_INTR_TYPE_FIXED)
            return (PSM_FAILURE);
        irqp = apic_find_irq(dip, ispec, hdlp->ih_type);
        if (irqp == NULL)
            return (PSM_FAILURE);
        apic_clear_mask(irqp);
        break;
    case PSM_INTR_OP_SET_MASK:
        if (hdlp->ih_type != DDI_INTR_TYPE_FIXED)
            return (PSM_FAILURE);
        if ((irqp = apic_find_irq(dip, ispec, hdlp->ih_type)) == NULL)
            return (PSM_FAILURE);
        apic_set_mask(irqp);
        break;
    case PSM_INTR_OP_GET_CAP:
        cap = DDI_INTR_FLAG_PENDING;
        if (hdlp->ih_type == DDI_INTR_TYPE_FIXED)
            cap |= DDI_INTR_FLAG_MASKABLE;
        else if (hdlp->ih_type == DDI_INTR_TYPE_MSIX)
            cap |= DDI_INTR_FLAG_RETARGETABLE;
        *result = cap;
        break;
    case PSM_INTR_OP_GET_SHARED:
        if (hdlp->ih_type != DDI_INTR_TYPE_FIXED)
            return (PSM_FAILURE);
        ispec = ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp;
        if ((irqp = apic_find_irq(dip, ispec, hdlp->ih_type)) == NULL)
            return (PSM_FAILURE);
        *result = (irqp->airq_share > 1) ? 1: 0;
        break;
    case PSM_INTR_OP_SET_PRI:
        old_priority = hdlp->ih_pri;    /* save old value */
        new_priority = *(int *)result;  /* try the new value */

        if (hdlp->ih_type == DDI_INTR_TYPE_FIXED) {
            return (PSM_SUCCESS);
        }

        /* Now allocate the vectors */
        if (hdlp->ih_type == DDI_INTR_TYPE_MSI) {
            /* SET_PRI does not support the case of multiple MSI */
            if (i_ddi_intr_get_current_nintrs(hdlp->ih_dip) > 1)
                return (PSM_FAILURE);

            count_vec = apic_alloc_msi_vectors(dip, hdlp->ih_inum,
                1, new_priority,
                DDI_INTR_ALLOC_STRICT);
        } else {
            count_vec = apic_alloc_msix_vectors(dip, hdlp->ih_inum,
                1, new_priority,
                DDI_INTR_ALLOC_STRICT);
        }

        /* Did we get new vectors? */
        if (!count_vec)
            return (PSM_FAILURE);

        /* Finally, free the previously allocated vectors */
        apic_free_vectors(dip, hdlp->ih_inum, count_vec,
            old_priority, hdlp->ih_type);
        break;
    case PSM_INTR_OP_SET_CPU:
    case PSM_INTR_OP_GRP_SET_CPU:
        /*
         * The interrupt handle given here has been allocated
         * specifically for this command, and ih_private carries
         * a CPU value.
         */
        new_cpu = (int)(intptr_t)hdlp->ih_private;
        if (!apic_cpu_in_range(new_cpu)) {
            DDI_INTR_IMPLDBG((CE_CONT,
                "[grp_]set_cpu: cpu out of range: %d\n", new_cpu));
            *result = EINVAL;
            return (PSM_FAILURE);
        }
        if (hdlp->ih_vector > APIC_MAX_VECTOR) {
            DDI_INTR_IMPLDBG((CE_CONT,
                "[grp_]set_cpu: vector out of range: %d\n",
                hdlp->ih_vector));
            *result = EINVAL;
            return (PSM_FAILURE);
        }
        if (!(hdlp->ih_flags & PSMGI_INTRBY_IRQ))
            hdlp->ih_vector = apic_vector_to_irq[hdlp->ih_vector];
        if (intr_op == PSM_INTR_OP_SET_CPU) {
            if (apic_set_cpu(hdlp->ih_vector, new_cpu, result) !=
                PSM_SUCCESS)
                return (PSM_FAILURE);
        } else {
            if (apic_grp_set_cpu(hdlp->ih_vector, new_cpu,
                result) != PSM_SUCCESS)
                return (PSM_FAILURE);
        }
        break;
    case PSM_INTR_OP_GET_INTR:
        /*
         * The interrupt handle given here has been allocated
         * specifically for this command, and ih_private carries
         * a pointer to a apic_get_intr_t.
         */
        if (apic_get_vector_intr_info(
            hdlp->ih_vector, hdlp->ih_private) != PSM_SUCCESS)
            return (PSM_FAILURE);
        break;
    case PSM_INTR_OP_APIC_TYPE:
        hdlp->ih_private = apic_get_apic_type();
        hdlp->ih_ver = apic_get_apic_version();
        break;
    case PSM_INTR_OP_SET_CAP:
    default:
        return (PSM_FAILURE);
    }
    return (PSM_SUCCESS);
}
#endif  /* !__xpv */