Adding upstream version 6.1.22-dfsg.upstream/6.1.22-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 655 insertions, 0 deletions

diff --git a/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.c b/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.c
new file mode 100644
index 00000000..6c8f0ec3
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.c
@@ -0,0 +1,655 @@
+/* $Id: VirtioPci-solaris.c $ */
+/** @file
+ * VirtualBox Guest Additions - Virtio Driver for Solaris, PCI Hypervisor Interface.
+ */
+
+/*
+ * Copyright (C) 2010-2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "VirtioPci-solaris.h"
+
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/mem.h>
+#include <iprt/param.h>
+#include <VBox/log.h>
+
+#include <sys/pci.h>
+#include <sys/param.h>
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+/*
+ * Pci Register offsets.
+ */
+#define VIRTIO_PCI_HOST_FEATURES            0x00
+#define VIRTIO_PCI_GUEST_FEATURES           0x04
+#define VIRTIO_PCI_QUEUE_PFN                0x08
+#define VIRTIO_PCI_QUEUE_NUM                0x0C
+#define VIRTIO_PCI_QUEUE_SEL                0x0E
+#define VIRTIO_PCI_QUEUE_NOTIFY             0x10
+#define VIRTIO_PCI_STATUS                   0x12
+#define VIRTIO_PCI_ISR                      0x13
+#define VIRTIO_PCI_CONFIG                   0x14
+
+#define VIRTIO_PCI_RING_ALIGN               PAGE_SIZE
+#define VIRTIO_PCI_QUEUE_ADDR_SHIFT         PAGE_SHIFT
+
+/**
+ * virtio_pci_t: Private data per device instance.
+ */
+typedef struct virtio_pci_t
+{
+    ddi_acc_handle_t    hIO;            /* IO handle */
+    caddr_t             addrIOBase;     /* IO base address */
+} virtio_pci_t;
+
+/**
+ * virtio_pci_queue_t: Private data per queue instance.
+ */
+typedef struct virtio_pci_queue_t
+{
+    ddi_dma_handle_t    hDMA;           /* DMA handle. */
+    ddi_acc_handle_t    hIO;            /* IO handle. */
+    size_t              cbBuf;          /* Physical address of buffer. */
+    paddr_t             physBuf;        /* Size of buffer. */
+    pfn_t               pageBuf;        /* Page frame number of buffer. */
+} virtio_pci_queue_t;
+
+static ddi_device_acc_attr_t g_VirtioPciAccAttrRegs =
+{
+    DDI_DEVICE_ATTR_V0,                 /* Version */
+    DDI_STRUCTURE_LE_ACC,               /* Structural data access in little endian. */
+    DDI_STRICTORDER_ACC,                /* Strict ordering. */
+    DDI_DEFAULT_ACC                     /* Default access, possible panic on errors*/
+};
+
+static ddi_device_acc_attr_t g_VirtioPciAccAttrRing =
+{
+    DDI_DEVICE_ATTR_V0,                 /* Version. */
+    DDI_NEVERSWAP_ACC,                  /* Data access with no byte swapping*/
+    DDI_STRICTORDER_ACC,                /* Strict ordering. */
+    DDI_DEFAULT_ACC                     /* Default access, possible panic on errors*/
+};
+
+static ddi_dma_attr_t g_VirtioPciDmaAttrRing =
+{
+    DMA_ATTR_V0,                        /* Version. */
+    0,                                  /* Lowest usable address. */
+    0xffffffffffffffffULL,              /* Highest usable address. */
+    0x7fffffff,                         /* Maximum DMAable byte count. */
+    VIRTIO_PCI_RING_ALIGN,              /* Alignment in bytes. */
+    0x7ff,                              /* Bitmap of burst sizes */
+    1,                                  /* Minimum transfer. */
+    0xffffffffU,                        /* Maximum transfer. */
+    0xffffffffffffffffULL,              /* Maximum segment length. */
+    1,                                  /* Maximum number of segments. */
+    1,                                  /* Granularity. */
+    0                                   /* Flags (reserved). */
+};
+
+/** Pointer to the interrupt handle vector */
+static ddi_intr_handle_t   *g_pIntr;
+/** Number of actually allocated interrupt handles */
+static size_t               g_cIntrAllocated;
+/** The IRQ Mutex */
+static kmutex_t             g_IrqMtx;
+
+
+/*********************************************************************************************************************************
+*   Internal Functions                                                                                                           *
+*********************************************************************************************************************************/
+static void    *VirtioPciAlloc(PVIRTIODEVICE pDevice);
+static void     VirtioPciFree(PVIRTIODEVICE pDevice);
+static int      VirtioPciAttach(PVIRTIODEVICE pDevice);
+static int      VirtioPciDetach(PVIRTIODEVICE pDevice);
+static uint32_t VirtioPciGetFeatures(PVIRTIODEVICE pDevice);
+static void     VirtioPciSetFeatures(PVIRTIODEVICE pDevice, uint32_t fFeatures);
+static int      VirtioPciNotifyQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue);
+static void     VirtioPciGet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb);
+static void     VirtioPciSet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb);
+static void    *VirtioPciGetQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue);
+static void     VirtioPciPutQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue);
+static void     VirtioPciSetStatus(PVIRTIODEVICE pDevice, uint8_t Status);
+
+static uint_t   VirtioPciISR(caddr_t Arg);
+static int      VirtioPciSetupIRQ(dev_info_t *pDip);
+static void     VirtioPciRemoveIRQ(dev_info_t *pDip);
+
+/**
+ * Hypervisor operations for Virtio Pci.
+ */
+VIRTIOHYPEROPS g_VirtioHyperOpsPci =
+{
+    VirtioPciAlloc,
+    VirtioPciFree,
+    VirtioPciAttach,
+    VirtioPciDetach,
+    VirtioPciGetFeatures,
+    VirtioPciSetFeatures,
+    VirtioPciNotifyQueue,
+    VirtioPciGet,
+    VirtioPciSet,
+    VirtioPciGetQueue,
+    VirtioPciPutQueue,
+    VirtioPciSetStatus
+};
+
+
+/**
+ * Virtio Pci private data allocation routine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @return Allocated private data structure which must only be freed by calling
+ *         VirtioPciFree().
+ */
+static void *VirtioPciAlloc(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciAlloc pDevice=%p\n", pDevice));
+    virtio_pci_t *pPciData = RTMemAllocZ(sizeof(virtio_pci_t));
+    return pPciData;
+}
+
+
+/**
+ * Virtio Pci private data deallocation routine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ */
+static void VirtioPciFree(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciFree pDevice=%p\n", pDevice));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    if (pPciData)
+    {
+        RTMemFree(pDevice->pvHyper);
+        pDevice->pvHyper = NULL;
+    }
+}
+
+
+/**
+ * Virtio Pci attach routine, called from driver attach.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ *
+ * @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
+ */
+static int VirtioPciAttach(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciAttach pDevice=%p\n", pDevice));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    AssertReturn(pPciData, DDI_FAILURE);
+
+    int rc = ddi_regs_map_setup(pDevice->pDip,
+                                1,                       /* reg. num */
+                                &pPciData->addrIOBase,
+                                0,                       /* offset */
+                                0,                       /* length */
+                                &g_VirtioPciAccAttrRegs,
+                                &pPciData->hIO);
+    if (rc == DDI_SUCCESS)
+    {
+        /*
+         * Reset the device.
+         */
+        VirtioPciSetStatus(pDevice, 0);
+
+        /*
+         * Add interrupt handler.
+         */
+        VirtioPciSetupIRQ(pDevice->pDip);
+
+        LogFlow((VIRTIOLOGNAME ":VirtioPciAttach: successfully mapped registers.\n"));
+        return DDI_SUCCESS;
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioPciAttach: ddi_regs_map_setup failed. rc=%d\n", rc));
+    return DDI_FAILURE;
+}
+
+
+/**
+ * Virtio Pci detach routine, called from driver detach.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ *
+ * @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
+ */
+static int VirtioPciDetach(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciDetach pDevice=%p\n", pDevice));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    AssertReturn(pPciData, DDI_FAILURE);
+
+    VirtioPciRemoveIRQ(pDevice->pDip);
+    ddi_regs_map_free(&pPciData->hIO);
+    return DDI_SUCCESS;
+}
+
+
+/**
+ * Get host supported features.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ *
+ * @return Mask of host features.
+ */
+static uint32_t VirtioPciGetFeatures(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciGetFeatures pDevice=%p\n", pDevice));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    AssertReturn(pPciData, 0);
+
+    return ddi_get32(pPciData->hIO, (uint32_t *)(pPciData->addrIOBase + VIRTIO_PCI_HOST_FEATURES));
+}
+
+
+/**
+ * Set guest supported features.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param u32Features       Mask of guest supported features.
+ */
+static void VirtioPciSetFeatures(PVIRTIODEVICE pDevice, uint32_t u32Features)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciSetFeatures pDevice=%p\n", pDevice));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    AssertReturnVoid(pPciData);
+
+    ddi_put32(pPciData->hIO, (uint32_t *)(pPciData->addrIOBase + VIRTIO_PCI_GUEST_FEATURES), u32Features);
+}
+
+
+/**
+ * Update the queue, notify the host.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param pQueue            Pointer to the Queue that is doing the notification.
+ *
+ * @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
+ */
+static int VirtioPciNotifyQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciNotifyQueue pDevice=%p pQueue=%p\n", pDevice, pQueue));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    AssertReturn(pPciData, DDI_FAILURE);
+
+    pQueue->Ring.pRingAvail->Index += pQueue->cBufs;
+    pQueue->cBufs = 0;
+
+    ASMCompilerBarrier();
+
+    ddi_put16(pPciData->hIO, (uint16_t *)(pPciData->addrIOBase + VIRTIO_PCI_QUEUE_NOTIFY), pQueue->QueueIndex);
+    cmn_err(CE_NOTE, "VirtioPciNotifyQueue\n");
+}
+
+
+
+/**
+ * Virtio Pci set (write) routine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param off               Offset into the PCI config space.
+ * @param pv                Pointer to the buffer to write from.
+ * @param cb                Size of the buffer in bytes.
+ */
+static void VirtioPciSet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciSet pDevice=%p\n", pDevice));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    AssertReturnVoid(pPciData);
+
+    uint8_t *pb = pv;
+    for (size_t i = 0; i < cb; i++, pb++)
+        ddi_put8(pPciData->hIO, (uint8_t *)(pPciData->addrIOBase + VIRTIO_PCI_CONFIG + off + i), *pb);
+}
+
+
+/**
+ * Virtio Pci get (read) routine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param off               Offset into the PCI config space.
+ * @param pv                Where to store the read data.
+ * @param cb                Size of the buffer in bytes.
+ */
+static void VirtioPciGet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciGet pDevice=%p off=%u pv=%p cb=%u\n", pDevice, off, pv, cb));
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    AssertReturnVoid(pPciData);
+
+    uint8_t *pb = pv;
+    for (size_t i = 0; i < cb; i++, pb++)
+        *pb = ddi_get8(pPciData->hIO, (uint8_t *)(pPciData->addrIOBase + VIRTIO_PCI_CONFIG + off + i));
+}
+
+
+/**
+ * Virtio Pci put queue routine. Places the queue and frees associated queue.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param pQueue            Pointer to the queue.
+ */
+static void VirtioPciPutQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciPutQueue pDevice=%p pQueue=%p\n", pDevice, pQueue));
+    AssertReturnVoid(pDevice);
+    AssertReturnVoid(pQueue);
+
+    virtio_pci_t *pPci = pDevice->pvHyper;
+    AssertReturnVoid(pPci);
+    virtio_pci_queue_t *pPciQueue = pQueue->pvData;
+    if (RT_UNLIKELY(!pPciQueue))
+    {
+        LogRel((VIRTIOLOGNAME ":VirtioPciPutQueue missing Pci queue.\n"));
+        return;
+    }
+
+    ddi_put16(pPci->hIO, (uint16_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_SEL), pQueue->QueueIndex);
+    ddi_put32(pPci->hIO, (uint32_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_PFN), 0);
+
+    ddi_dma_unbind_handle(pPciQueue->hDMA);
+    ddi_dma_mem_free(&pPciQueue->hIO);
+    ddi_dma_free_handle(&pPciQueue->hDMA);
+    RTMemFree(pPciQueue);
+}
+
+
+/**
+ * Virtio Pci get queue routine. Allocates a PCI queue and DMA resources.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param pQueue            Where to store the queue.
+ *
+ * @return An allocated Virtio Pci queue, or NULL in case of errors.
+ */
+static void *VirtioPciGetQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioPciGetQueue pDevice=%p pQueue=%p\n", pDevice, pQueue));
+    AssertReturn(pDevice, NULL);
+
+    virtio_pci_t *pPci = pDevice->pvHyper;
+    AssertReturn(pPci, NULL);
+
+    /*
+     * Select a Queue.
+     */
+    ddi_put16(pPci->hIO, (uint16_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_SEL), pQueue->QueueIndex);
+
+    /*
+     * Get the currently selected Queue's size.
+     */
+    pQueue->Ring.cDesc = ddi_get16(pPci->hIO, (uint16_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_NUM));
+    if (RT_UNLIKELY(!pQueue->Ring.cDesc))
+    {
+        LogRel((VIRTIOLOGNAME ": VirtioPciGetQueue: Queue[%d] has no descriptors.\n", pQueue->QueueIndex));
+        return NULL;
+    }
+
+    /*
+     * Check if it's already active.
+     */
+    uint32_t QueuePFN = ddi_get32(pPci->hIO, (uint32_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_PFN));
+    if (QueuePFN != 0)
+    {
+        LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: Queue[%d] is already used.\n", pQueue->QueueIndex));
+        return NULL;
+    }
+
+    LogFlow(("Queue[%d] has %d slots.\n", pQueue->QueueIndex, pQueue->Ring.cDesc));
+
+    /*
+     * Allocate and initialize Pci queue data.
+     */
+    virtio_pci_queue_t *pPciQueue = RTMemAllocZ(sizeof(virtio_pci_queue_t));
+    if (pPciQueue)
+    {
+        /*
+         * Setup DMA.
+         */
+        size_t cbQueue = VirtioRingSize(pQueue->Ring.cDesc, VIRTIO_PCI_RING_ALIGN);
+        int rc = ddi_dma_alloc_handle(pDevice->pDip, &g_VirtioPciDmaAttrRing, DDI_DMA_SLEEP, 0 /* addr */, &pPciQueue->hDMA);
+        if (rc == DDI_SUCCESS)
+        {
+            rc = ddi_dma_mem_alloc(pPciQueue->hDMA, cbQueue, &g_VirtioPciAccAttrRing, DDI_DMA_CONSISTENT,
+                                   DDI_DMA_SLEEP, 0 /* addr */, &pQueue->pQueue, &pPciQueue->cbBuf,
+                                   &pPciQueue->hIO);
+            if (rc == DDI_SUCCESS)
+            {
+                AssertRelease(pPciQueue->cbBuf >= cbQueue);
+                ddi_dma_cookie_t DmaCookie;
+                uint_t cCookies;
+                rc = ddi_dma_addr_bind_handle(pPciQueue->hDMA, NULL /* addrspace */, pQueue->pQueue, pPciQueue->cbBuf,
+                                              DDI_DMA_RDWR | DDI_DMA_CONSISTENT, DDI_DMA_SLEEP,
+                                              0 /* addr */, &DmaCookie, &cCookies);
+                if (rc == DDI_SUCCESS)
+                {
+                    pPciQueue->physBuf = DmaCookie.dmac_laddress;
+                    pPciQueue->pageBuf = pPciQueue->physBuf >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
+
+                    LogFlow((VIRTIOLOGNAME ":VirtioPciGetQueue: Queue[%d]%p physBuf=%x pfn of Buf %#x\n", pQueue->QueueIndex,
+                             pQueue->pQueue, pPciQueue->physBuf, pPciQueue->pageBuf));
+                    cmn_err(CE_NOTE, ":VirtioPciGetQueue: Queue[%d]%p physBuf=%x pfn of Buf %x\n", pQueue->QueueIndex,
+                             pQueue->pQueue, pPciQueue->physBuf, pPciQueue->pageBuf);
+
+                    /*
+                     * Activate the queue and initialize a ring for the queue.
+                     */
+                    memset(pQueue->pQueue, 0, pPciQueue->cbBuf);
+                    ddi_put32(pPci->hIO, (uint32_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_PFN), pPciQueue->pageBuf);
+                    VirtioRingInit(pQueue, pQueue->Ring.cDesc, pQueue->pQueue, VIRTIO_PCI_RING_ALIGN);
+                    return pPciQueue;
+                }
+                else
+                    LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: ddi_dma_addr_bind_handle failed. rc=%d\n", rc));
+
+                ddi_dma_mem_free(&pPciQueue->hIO);
+            }
+            else
+                LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: ddi_dma_mem_alloc failed for %u bytes rc=%d\n", cbQueue, rc));
+
+            ddi_dma_free_handle(&pPciQueue->hDMA);
+        }
+        else
+            LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: ddi_dma_alloc_handle failed. rc=%d\n", rc));
+
+        RTMemFree(pPciQueue);
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: failed to alloc %u bytes for Pci Queue data.\n", sizeof(virtio_pci_queue_t)));
+
+    return NULL;
+}
+
+
+/**
+ * Set the Virtio PCI status bit.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param Status            The status to set.
+ */
+static void VirtioPciSetStatus(PVIRTIODEVICE pDevice, uint8_t Status)
+{
+    virtio_pci_t *pPciData = pDevice->pvHyper;
+    ddi_put8(pPciData->hIO, (uint8_t *)(pPciData->addrIOBase + VIRTIO_PCI_STATUS), Status);
+}
+
+
+/**
+ * Sets up IRQ for Virtio PCI.
+ *
+ * @param   pDip     Pointer to the device info structure.
+ *
+ * @return Solaris error code.
+ */
+static int VirtioPciSetupIRQ(dev_info_t *pDip)
+{
+    LogFlow((VIRTIOLOGNAME ":VirtioPciSetupIRQ: pDip=%p\n", pDip));
+    cmn_err(CE_NOTE, "VirtioPciSetupIRQ\n");
+
+    int IntrType = 0;
+    int rc = ddi_intr_get_supported_types(pDip, &IntrType);
+    if (rc == DDI_SUCCESS)
+    {
+        /* We won't need to bother about MSIs. */
+        if (IntrType & DDI_INTR_TYPE_FIXED)
+        {
+            int IntrCount = 0;
+            rc = ddi_intr_get_nintrs(pDip, IntrType, &IntrCount);
+            if (   rc == DDI_SUCCESS
+                && IntrCount > 0)
+            {
+                int IntrAvail = 0;
+                rc = ddi_intr_get_navail(pDip, IntrType, &IntrAvail);
+                if (   rc == DDI_SUCCESS
+                    && IntrAvail > 0)
+                {
+                    /* Allocated kernel memory for the interrupt handles. The allocation size is stored internally. */
+                    g_pIntr = RTMemAllocZ(IntrCount * sizeof(ddi_intr_handle_t));
+                    if (g_pIntr)
+                    {
+                        int IntrAllocated;
+                        rc = ddi_intr_alloc(pDip, g_pIntr, IntrType, 0, IntrCount, &IntrAllocated, DDI_INTR_ALLOC_NORMAL);
+                        if (   rc == DDI_SUCCESS
+                            && IntrAllocated > 0)
+                        {
+                            g_cIntrAllocated = IntrAllocated;
+                            uint_t uIntrPriority;
+                            rc = ddi_intr_get_pri(g_pIntr[0], &uIntrPriority);
+                            if (rc == DDI_SUCCESS)
+                            {
+                                /* Initialize the mutex. */
+                                mutex_init(&g_IrqMtx, NULL, MUTEX_DRIVER, DDI_INTR_PRI(uIntrPriority));
+
+                                /* Assign interrupt handler functions and enable interrupts. */
+                                for (int i = 0; i < IntrAllocated; i++)
+                                {
+                                    rc = ddi_intr_add_handler(g_pIntr[i], (ddi_intr_handler_t *)VirtioPciISR,
+                                                            NULL /* No Private Data */, NULL);
+                                    if (rc == DDI_SUCCESS)
+                                        rc = ddi_intr_enable(g_pIntr[i]);
+                                    if (rc != DDI_SUCCESS)
+                                    {
+                                        /* Changing local IntrAllocated to hold so-far allocated handles for freeing. */
+                                        IntrAllocated = i;
+                                        break;
+                                    }
+                                }
+                                if (rc == DDI_SUCCESS)
+                                {
+                                    cmn_err(CE_NOTE, "VirtioPciSetupIRQ success\n");
+                                    return rc;
+                                }
+
+                                /* Remove any assigned handlers */
+                                LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ failed to assign IRQs allocated=%d\n", IntrAllocated));
+                                for (int x = 0; x < IntrAllocated; x++)
+                                    ddi_intr_remove_handler(g_pIntr[x]);
+                            }
+                            else
+                                LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ failed to get priority of interrupt. rc=%d\n", rc));
+
+                            /* Remove allocated IRQs, too bad we can free only one handle at a time. */
+                            for (int k = 0; k < g_cIntrAllocated; k++)
+                                ddi_intr_free(g_pIntr[k]);
+                        }
+                        else
+                            LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to allocated IRQs. count=%d\n", IntrCount));
+                        RTMemFree(g_pIntr);
+                    }
+                    else
+                        LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to allocated IRQs. count=%d\n", IntrCount));
+                }
+                else
+                {
+                    LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to get or insufficient available IRQs. rc=%d IntrAvail=%d\n",
+                            rc, IntrAvail));
+                }
+            }
+            else
+            {
+                LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to get or insufficient number of IRQs. rc=%d IntrCount=%d\n", rc,
+                        IntrCount));
+            }
+        }
+        else
+            LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: invalid irq type. IntrType=%#x\n", IntrType));
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to get supported interrupt types\n"));
+    return rc;
+}
+
+
+/**
+ * Removes IRQ for Virtio PCI device.
+ *
+ * @param   pDip     Pointer to the device info structure.
+ */
+static void VirtioPciRemoveIRQ(dev_info_t *pDip)
+{
+    LogFlow((VIRTIOLOGNAME ":VirtioPciRemoveIRQ pDip=%p:\n", pDip));
+
+    for (int i = 0; i < g_cIntrAllocated; i++)
+    {
+        int rc = ddi_intr_disable(g_pIntr[i]);
+        if (rc == DDI_SUCCESS)
+        {
+            rc = ddi_intr_remove_handler(g_pIntr[i]);
+            if (rc == DDI_SUCCESS)
+                ddi_intr_free(g_pIntr[i]);
+        }
+    }
+    RTMemFree(g_pIntr);
+    mutex_destroy(&g_IrqMtx);
+}
+
+
+/**
+ * Interrupt Service Routine for Virtio PCI device.
+ *
+ * @param   Arg     Private data (unused, will be NULL).
+ * @returns DDI_INTR_CLAIMED if it's our interrupt, DDI_INTR_UNCLAIMED if it isn't.
+ */
+static uint_t VirtioPciISR(caddr_t Arg)
+{
+    LogFlow((VIRTIOLOGNAME ":VBoxGuestSolarisISR\n"));
+    cmn_err(CE_NOTE, "VBoxGuestSolarisISRd Arg=%p\n", Arg);
+
+    mutex_enter(&g_IrqMtx);
+    bool fOurIRQ = false;
+    /*
+     * Call the DeviceOps ISR routine somehow which should notify all Virtio queues
+     * on the interrupt.
+     */
+    mutex_exit(&g_IrqMtx);
+
+    return fOurIRQ ? DDI_INTR_CLAIMED : DDI_INTR_UNCLAIMED;
+}
+