Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

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

7 files changed, 2210 insertions, 0 deletions

diff --git a/src/VBox/Additions/solaris/Virtio/Makefile.kmk b/src/VBox/Additions/solaris/Virtio/Makefile.kmk
new file mode 100644
index 00000000..cd56717e
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/Makefile.kmk
@@ -0,0 +1,68 @@
+# $Id: Makefile.kmk $
+## @file
+# Sub-Makefile for Solaris Virtio drivers.
+#
+
+#
+# Copyright (C) 2010-2023 Oracle and/or its affiliates.
+#
+# This file is part of VirtualBox base platform packages, as
+# available from https://www.virtualbox.org.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation, in version 3 of the
+# License.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <https://www.gnu.org/licenses>.
+#
+# The contents of this file may alternatively be used under the terms
+# of the Common Development and Distribution License Version 1.0
+# (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+# in the VirtualBox 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.
+#
+# SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+#
+
+SUB_DEPTH = ../../../../..
+include $(KBUILD_PATH)/subheader.kmk
+
+#ifneq ($(KBUILD_HOST),solaris)
+#$(error "The Solaris guest additions can only be built on Solaris!")
+#endif
+
+#
+# virtionet ("virtnet" on Solaris) - The Virtio Network Drivers
+#
+SYSMODS.solaris        += virtionet
+virtionet_NAME.solaris  = virtnet
+virtionet_TEMPLATE      = VBoxGuestR0Drv
+ifdef VBOX_WITH_AUTOMATIC_DEFS_QUOTING
+ virtionet_DEFS         = VBOX_WITH_HGCM VBOX_SVN_REV=$(VBOX_SVN_REV) VBOX_VERSION_STRING="$(VBOX_VERSION_STRING)"
+else
+ virtionet_DEFS         = VBOX_WITH_HGCM VBOX_SVN_REV=$(VBOX_SVN_REV) VBOX_VERSION_STRING=\"$(VBOX_VERSION_STRING)\"
+endif
+virtionet_DEPS          = $(VBOX_SVN_REV_KMK)
+virtionet_INCS         := .
+virtionet_SOURCES       = \
+	Virtio-solaris.c \
+	VirtioPci-solaris.c \
+	VirtioRing-solaris.c \
+	VirtioNet-solaris.c
+# virtionet should resolve all IPRT bits from vboxguest.
+#virtionet_LIBS          = \
+#	$(VBOX_LIB_IPRT_GUEST_R0)
+virtionet_LDFLAGS      += -N drv/vboxguest -N misc/mac
+
+include $(FILE_KBUILD_SUB_FOOTER)
+
diff --git a/src/VBox/Additions/solaris/Virtio/Virtio-solaris.c b/src/VBox/Additions/solaris/Virtio/Virtio-solaris.c
new file mode 100644
index 00000000..7406f68d
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/Virtio-solaris.c
@@ -0,0 +1,224 @@
+/* $Id: Virtio-solaris.c $ */
+/** @file
+ * VirtualBox Guest Additions - Virtio Driver for Solaris.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "Virtio-solaris.h"
+
+#include <iprt/assert.h>
+#include <iprt/mem.h>
+#include <VBox/log.h>
+
+
+/**
+ * Virtio Attach routine that should be called from all Virtio drivers' attach
+ * routines.
+ *
+ * @param pDip              The module structure instance.
+ * @param enmCmd            Operation type (attach/resume).
+ * @param pDeviceOps        Pointer to device ops structure.
+ * @param pHyperOps         Pointer to hypervisor ops structure.
+ *
+ * @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
+ */
+int VirtioAttach(dev_info_t *pDip, ddi_attach_cmd_t enmCmd, PVIRTIODEVICEOPS pDeviceOps, PVIRTIOHYPEROPS pHyperOps)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioAttach: pDip=%p enmCmd=%d pDeviceOps=%p pHyperOps=%p\n", pDip, enmCmd, pDeviceOps, pHyperOps));
+
+    AssertReturn(pDip, DDI_EINVAL);
+    AssertReturn(pDeviceOps, DDI_EINVAL);
+    AssertReturn(pHyperOps, DDI_EINVAL);
+
+    if (enmCmd != DDI_ATTACH)
+    {
+        LogRel((VIRTIOLOGNAME ":VirtioAttach: Invalid enmCmd=%#x expected DDI_ATTACH\n", enmCmd));
+        return DDI_FAILURE;
+    }
+
+    int rc = DDI_FAILURE;
+    PVIRTIODEVICE pDevice = RTMemAllocZ(sizeof(VIRTIODEVICE));
+    if (RT_LIKELY(pDevice))
+    {
+        pDevice->pDip = pDip;
+        pDevice->pDeviceOps = pDeviceOps;
+        pDevice->pHyperOps = pHyperOps;
+
+        pDevice->pvDevice = pDevice->pDeviceOps->pfnAlloc(pDevice);
+        if (RT_LIKELY(pDevice->pvDevice))
+        {
+            pDevice->pvHyper = pDevice->pHyperOps->pfnAlloc(pDevice);
+            if (RT_LIKELY(pDevice->pvHyper))
+            {
+                /*
+                 * Attach hypervisor interface and obtain features supported by host.
+                 */
+                rc = pDevice->pHyperOps->pfnAttach(pDevice);
+                if (rc == DDI_SUCCESS)
+                {
+                    pDevice->fHostFeatures = pDevice->pHyperOps->pfnGetFeatures(pDevice);
+                    LogFlow((VIRTIOLOGNAME ":VirtioAttach: Host features=%#x\n", pDevice->fHostFeatures));
+
+                    /*
+                     * Attach the device type interface.
+                     */
+                    rc = pDevice->pDeviceOps->pfnAttach(pDevice);
+                    if (rc == DDI_SUCCESS)
+                    {
+                        ddi_set_driver_private(pDip, pDevice);
+                        return DDI_SUCCESS;
+                    }
+                    else
+                        LogRel((VIRTIOLOGNAME ":VirtioAttach: DeviceOps pfnAttach failed. rc=%d\n", rc));
+
+                    pDevice->pHyperOps->pfnDetach(pDevice);
+                }
+                else
+                    LogRel((VIRTIOLOGNAME ":VirtioAttach: HyperOps pfnAttach failed. rc=%d\n", rc));
+
+                pDevice->pHyperOps->pfnFree(pDevice);
+            }
+            else
+                LogRel((VIRTIOLOGNAME ":VirtioAttach: HyperOps->pfnAlloc failed!\n"));
+
+            pDevice->pDeviceOps->pfnFree(pDevice);
+        }
+        else
+            LogRel((VIRTIOLOGNAME ":VirtioAttach: DeviceOps->pfnAlloc failed!\n"));
+
+        RTMemFree(pDevice);
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioAttach: failed to alloc %u bytes for device structure.\n", sizeof(VIRTIODEVICE)));
+
+    return DDI_FAILURE;
+}
+
+
+/**
+ * Virtio Detach routine that should be called from all Virtio drivers' detach
+ * routines.
+ *
+ * @param pDip              The module structure instance.
+ * @param enmCmd            Operation type (detach/suspend).
+ *
+ * @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
+ */
+int VirtioDetach(dev_info_t *pDip, ddi_detach_cmd_t enmCmd)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioDetach pDip=%p enmCmd=%d\n", pDip, enmCmd));
+
+    PVIRTIODEVICE pDevice = ddi_get_driver_private(pDip);
+    if (RT_UNLIKELY(!pDevice))
+        return DDI_FAILURE;
+
+    if (enmCmd != DDI_DETACH)
+    {
+        LogRel((VIRTIOLOGNAME ":VirtioDetach: Invalid enmCmd=%#x expected DDI_DETACH.\n", enmCmd));
+        return DDI_FAILURE;
+    }
+
+    int rc = pDevice->pDeviceOps->pfnDetach(pDevice);
+    if (rc == DDI_SUCCESS)
+    {
+        pDevice->pHyperOps->pfnDetach(pDevice);
+        pDevice->pDeviceOps->pfnFree(pDevice);
+        pDevice->pvDevice = NULL;
+        pDevice->pHyperOps->pfnFree(pDevice);
+        pDevice->pvHyper = NULL;
+
+        ddi_set_driver_private(pDevice->pDip, NULL);
+        RTMemFree(pDevice);
+        return DDI_SUCCESS;
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioDetach: DeviceOps pfnDetach failed. rc=%d\n", rc));
+
+    return DDI_FAILURE;
+}
+
+
+/**
+ * Allocates a Virtio Queue object and assigns it an index.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param Index             Queue index.
+ *
+ * @return A pointer to a Virtio Queue instance.
+ */
+PVIRTIOQUEUE VirtioGetQueue(PVIRTIODEVICE pDevice, uint16_t Index)
+{
+    PVIRTIOQUEUE pQueue = RTMemAllocZ(sizeof(VIRTIOQUEUE));
+    if (RT_UNLIKELY(!pQueue))
+    {
+        LogRel((VIRTIOLOGNAME ":VirtioGetQueue: failed to alloc memory for %u bytes.\n", sizeof(VIRTIOQUEUE)));
+        return NULL;
+    }
+
+    pQueue->QueueIndex = Index;
+    pQueue->pvData     = pDevice->pHyperOps->pfnGetQueue(pDevice, pQueue);
+    if (RT_UNLIKELY(!pQueue->pvData))
+    {
+        LogRel((VIRTIOLOGNAME ":VirtioGetQueue: HyperOps GetQueue failed!\n"));
+        RTMemFree(pQueue);
+        return NULL;
+    }
+
+    AssertReturn(pQueue->pQueue, NULL);
+    AssertReturn(pQueue->Ring.cDesc > 0, NULL);
+
+    /** @todo enable interrupt. */
+
+    return pQueue;
+}
+
+
+/**
+ * Puts a queue and destroys the instance.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ * @param pQueue            Pointer to the Virtio queue.
+ */
+void VirtioPutQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue)
+{
+    AssertReturnVoid(pDevice);
+    AssertReturnVoid(pQueue);
+
+    pDevice->pHyperOps->pfnPutQueue(pDevice, pQueue);
+    RTMemFree(pQueue);
+}
+
diff --git a/src/VBox/Additions/solaris/Virtio/Virtio-solaris.h b/src/VBox/Additions/solaris/Virtio/Virtio-solaris.h
new file mode 100644
index 00000000..9badca92
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/Virtio-solaris.h
@@ -0,0 +1,205 @@
+/* $Id: Virtio-solaris.h $ */
+/** @file
+ * VirtualBox Guest Additions: Virtio Driver for Solaris, header.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef GA_INCLUDED_SRC_solaris_Virtio_Virtio_solaris_h
+#define GA_INCLUDED_SRC_solaris_Virtio_Virtio_solaris_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <sys/sunddi.h>
+
+/** Release log descriptive prefix. */
+#define VIRTIOLOGNAME           "Virtio"
+/** Buffer continues via the Next field */
+#define VIRTIO_FLAGS_RING_DESC_NEXT       RT_BIT(0)
+/** Buffer is write-only, else is read-only.  */
+#define VIRTIO_FLAGS_RING_DESC_WRITE      RT_BIT(1)
+/** Indirect buffer (buffer contains list of buffer descriptors) */
+#define VIRTIO_FLAGS_RING_DESC_INDIRECT   RT_BIT(2)
+
+/* Values from our Virtio.h */
+#define VIRTIO_PCI_STATUS_ACK             0x01
+#define VIRTIO_PCI_STATUS_DRV             0x02
+#define VIRTIO_PCI_STATUS_DRV_OK          0x04
+#define VIRTIO_PCI_STATUS_FAILED          0x80
+
+/**
+ * The ring descriptor table refers to the buffers the guest is using for the
+ * device.
+ */
+struct VirtioRingDesc
+{
+    uint64_t                AddrBuf;            /* Physical address of buffer. */
+    uint32_t                cbBuf;              /* Length of the buffer in bytes. */
+    uint16_t                fFlags;             /* Flags of the next buffer. */
+    uint16_t                Next;               /* Index of the next buffer. */
+};
+typedef struct VirtioRingDesc VIRTIORINGDESC;
+typedef VIRTIORINGDESC *PVIRTIORINGDESC;
+
+/**
+ * The available ring refers to what descriptors are being offered to the
+ * device.
+ */
+struct VirtioRingAvail
+{
+    uint16_t                fFlags;             /* Interrupt supression flag. */
+    uint16_t                Index;              /* Index of available ring. */
+    uint16_t                aRings[1];          /* Array of indices into descriptor table. */
+};
+typedef struct VirtioRingAvail VIRTIORINGAVAIL;
+typedef VIRTIORINGAVAIL *PVIRTIORINGAVAIL;
+
+/**
+ * The used ring refers to the buffers the device is done using them. The
+ * element is a pair-descriptor refers to the buffer once the device is done
+ * with the buffer.
+ */
+struct VirtioRingUsedElem
+{
+    uint32_t                Index;              /* Index of start of used descriptor chain. */
+    uint32_t                cbElem;             /* Number of bytes written into the buffer. */
+};
+typedef struct VirtioRingUsedElem VIRTIORINGUSEDELEM;
+typedef VIRTIORINGUSEDELEM *PVIRTIORINGUSEDELEM;
+
+/**
+ * The Virtio Ring which contains the descriptors.
+ */
+struct VirtioRing
+{
+    uint_t                  cDesc;              /* Number of descriptors. */
+    PVIRTIORINGDESC         pRingDesc;          /* Pointer to ring descriptor. */
+    PVIRTIORINGAVAIL        pRingAvail;         /* Pointer to available ring. */
+    PVIRTIORINGUSEDELEM     pRingUsedElem;      /* Pointer to used ring element. */
+};
+typedef struct VirtioRing VIRTIORING;
+typedef VIRTIORING *PVIRTIORING;
+
+struct VirtioDevice;
+struct VirtioQueue;
+
+typedef void     *(*PFNVIRTIOALLOC)(struct VirtioDevice *pDevice);
+typedef void      (*PFNVIRTIOFREE)(struct VirtioDevice *pDevice);
+typedef int       (*PFNVIRTIOATTACH)(struct VirtioDevice *pDevice);
+typedef int       (*PFNVIRTIODETACH)(struct VirtioDevice *pDevice);
+typedef uint32_t  (*PFNVIRTIOGETFEATURES)(struct VirtioDevice *pDevice);
+typedef void      (*PFNVIRTIOSETFEATURES)(struct VirtioDevice *pDevice, uint32_t fFeatures);
+typedef void      (*PFNVIRTIOGET)(struct VirtioDevice *pDevice, off_t off, void *pv, size_t cb);
+typedef void      (*PFNVIRTIOSET)(struct VirtioDevice *pDevice, off_t off, void *pv, size_t cb);
+typedef void     *(*PFNVIRTIOGETQUEUE)(struct VirtioDevice *pDevice, struct VirtioQueue *pQueue);
+typedef void      (*PFNVIRTIOPUTQUEUE)(struct VirtioDevice *pDevice, struct VirtioQueue *pQueue);
+typedef int       (*PFNVIRTIONOTIFYQUEUE)(struct VirtioDevice *pDevice, struct VirtioQueue *pQueue);
+typedef void      (*PFNVIRTIOSETSTATUS)(struct VirtioDevice *pDevice, uint8_t Status);
+
+/**
+ * Virtio device operations.
+ */
+struct VirtioDeviceOps
+{
+    PFNVIRTIOALLOC          pfnAlloc;           /* Device alloc. */
+    PFNVIRTIOFREE           pfnFree;            /* Device free. */
+    PFNVIRTIOATTACH         pfnAttach;          /* Device attach. */
+    PFNVIRTIODETACH         pfnDetach;          /* Device detach. */
+};
+typedef struct VirtioDeviceOps VIRTIODEVICEOPS;
+typedef VIRTIODEVICEOPS *PVIRTIODEVICEOPS;
+
+/**
+ * Hypervisor access operations.
+ */
+struct VirtioHyperOps
+{
+    PFNVIRTIOALLOC          pfnAlloc;           /* Hypervisor alloc. */
+    PFNVIRTIOFREE           pfnFree;            /* Hypervisor free */
+    PFNVIRTIOATTACH         pfnAttach;          /* Hypervisor attach. */
+    PFNVIRTIODETACH         pfnDetach;          /* Hypervisor detach. */
+    PFNVIRTIOGETFEATURES    pfnGetFeatures;     /* Hypervisor get features. */
+    PFNVIRTIOSETFEATURES    pfnSetFeatures;     /* Hypervisor set features. */
+    PFNVIRTIONOTIFYQUEUE    pfnNotifyQueue;     /* Hypervisor notify queue. */
+    PFNVIRTIOGET            pfnGet;             /* Hypervisor get. */
+    PFNVIRTIOSET            pfnSet;             /* Hypervisor set. */
+    PFNVIRTIOGETQUEUE       pfnGetQueue;        /* Hypervisor get queue. */
+    PFNVIRTIOPUTQUEUE       pfnPutQueue;        /* Hypervisor put queue. */
+    PFNVIRTIOSETSTATUS      pfnSetStatus;       /* Hypervisor set status. */
+};
+typedef struct VirtioHyperOps VIRTIOHYPEROPS;
+typedef VIRTIOHYPEROPS *PVIRTIOHYPEROPS;
+
+/**
+ * Virtio Queue into which buffers are posted.
+ */
+struct VirtioQueue
+{
+    VIRTIORING              Ring;               /* Ring buffer of this queue. */
+    uint16_t                cBufs;              /* Number of pushed, unnotified buffers. */
+    uint16_t                FreeHeadIndex;      /* Index of head of free list. */
+    uint16_t                QueueIndex;         /* Index of this queue. */
+    caddr_t                 pQueue;             /* Allocated DMA region for queue. */
+    void                   *pvData;             /* Queue private data. */
+};
+typedef struct VirtioQueue VIRTIOQUEUE;
+typedef VIRTIOQUEUE *PVIRTIOQUEUE;
+
+/**
+ * Virtio device descriptor, common to all Virtio devices.
+ */
+struct VirtioDevice
+{
+    dev_info_t             *pDip;               /* OS device info. */
+    PVIRTIODEVICEOPS        pDeviceOps;         /* Device hooks. */
+    void                   *pvDevice;           /* Device opaque data. */
+    PVIRTIOHYPEROPS         pHyperOps;          /* Hypervisor hooks. */
+    void                   *pvHyper;            /* Hypervisor opaque data. */
+    uint32_t                fHostFeatures;      /* Features provided by the host. */
+};
+typedef struct VirtioDevice VIRTIODEVICE;
+typedef VIRTIODEVICE *PVIRTIODEVICE;
+
+
+int VirtioAttach(dev_info_t *pDip, ddi_attach_cmd_t enmCmd, PVIRTIODEVICEOPS pDeviceOps, PVIRTIOHYPEROPS pHyperOps);
+int VirtioDetach(dev_info_t *pDip, ddi_detach_cmd_t enmCmd);
+
+PVIRTIOQUEUE VirtioGetQueue(PVIRTIODEVICE pDevice, uint16_t Index);
+void VirtioPutQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue);
+
+void VirtioRingInit(PVIRTIOQUEUE pQueue, uint_t cDescs, caddr_t virtBuf, ulong_t Align);
+int  VirtioRingPush(PVIRTIOQUEUE pQueue, paddr_t physBuf, uint32_t cbBuf, uint16_t fFlags);
+size_t VirtioRingSize(uint64_t cElements, ulong_t Align);
+
+#endif /* !GA_INCLUDED_SRC_solaris_Virtio_Virtio_solaris_h */
+
diff --git a/src/VBox/Additions/solaris/Virtio/VirtioNet-solaris.c b/src/VBox/Additions/solaris/Virtio/VirtioNet-solaris.c
new file mode 100644
index 00000000..dee46ad7
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/VirtioNet-solaris.c
@@ -0,0 +1,852 @@
+/* $Id: VirtioNet-solaris.c $ */
+/** @file
+ * VirtualBox Guest Additions - Virtio Network Driver for Solaris.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "Virtio-solaris.h"
+#include "VirtioPci-solaris.h"
+
+#include <sys/conf.h>
+#include <sys/sunddi.h>
+#include <sys/mac_provider.h>
+#include <sys/strsun.h>
+#include <sys/cmn_err.h>
+
+#include <iprt/assert.h>
+#include <iprt/initterm.h>
+#include <iprt/errcore.h>
+#include <VBox/log.h>
+#include <iprt/mem.h>
+#include <iprt/rand.h>
+#include <iprt/string.h>
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+#define DEVICE_NAME               "virtnet"
+/** The module descriptions as seen in 'modinfo'. */
+#define DEVICE_DESC_DRV           "VirtualBox VirtioNet"
+
+/** Copied from "mac_ether.h" - why the heck is this not public?? All Solaris
+ *  mac clients use it... */
+#define MAC_PLUGIN_IDENT_ETHER    "mac_ether"
+
+/* Copied from our Virtio Device emulation. */
+#define VIRTIO_NET_CSUM           0x00000001      /* Host handles pkts w/ partial csum */
+#define VIRTIO_NET_GUEST_CSUM     0x00000002      /* Guest handles pkts w/ partial csum */
+#define VIRTIO_NET_MAC            0x00000020      /* Host has given MAC address. */
+#define VIRTIO_NET_GSO            0x00000040      /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_GUEST_TSO4     0x00000080      /* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_GUEST_TSO6     0x00000100      /* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_GUEST_ECN      0x00000200      /* Guest can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_GUEST_UFO      0x00000400      /* Guest can handle UFO in. */
+#define VIRTIO_NET_HOST_TSO4      0x00000800      /* Host can handle TSOv4 in. */
+#define VIRTIO_NET_HOST_TSO6      0x00001000      /* Host can handle TSOv6 in. */
+#define VIRTIO_NET_HOST_ECN       0x00002000      /* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_HOST_UFO       0x00004000      /* Host can handle UFO in. */
+#define VIRTIO_NET_MRG_RXBUF      0x00008000      /* Host can merge receive buffers. */
+#define VIRTIO_NET_STATUS         0x00010000      /* virtio_net_config.status available */
+#define VIRTIO_NET_CTRL_VQ        0x00020000      /* Control channel available */
+#define VIRTIO_NET_CTRL_RX        0x00040000      /* Control channel RX mode support */
+#define VIRTIO_NET_CTRL_VLAN      0x00080000      /* Control channel VLAN filtering */
+
+
+/*********************************************************************************************************************************
+*   Internal Functions                                                                                                           *
+*********************************************************************************************************************************/
+static void      *VirtioNetDevAlloc(PVIRTIODEVICE pDevice);
+static void       VirtioNetDevFree(PVIRTIODEVICE pDevice);
+static int        VirtioNetDevAttach(PVIRTIODEVICE pDevice);
+static int        VirtioNetDevDetach(PVIRTIODEVICE pDevice);
+
+static int        VirtioNetAttach(dev_info_t *pDip, ddi_attach_cmd_t Cmd);
+static int        VirtioNetDetach(dev_info_t *pDip, ddi_detach_cmd_t Cmd);
+
+static int        VirtioNetStat(void *pvArg, uint_t cmdStat, uint64_t *pu64Val);
+static int        VirtioNetStart(void *pvArg);
+static void       VirtioNetStop(void *pvArg);
+static int        VirtioNetSetPromisc(void *pvArg, boolean_t fPromiscOn);
+static int        VirtioNetSetMulticast(void *pvArg, boolean_t fAdd, const uint8_t *pbMac);
+static int        VirtioNetSetUnicast(void *pvArg, const uint8_t *pbMac);
+static boolean_t  VirtioNetGetCapab(void *pvArg, mac_capab_t Capab, void *pvCapabData);
+static mblk_t    *VirtioNetXmit(void *pvArg, mblk_t *pMsg);
+static uint_t     VirtioNetISR(caddr_t addrArg);
+
+static int        VirtioNetAttachQueues(PVIRTIODEVICE pDevice);
+static void       VirtioNetDetachQueues(PVIRTIODEVICE pDevice);
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+/**
+ * Device operations for Virtio Net.
+ */
+VIRTIODEVICEOPS g_VirtioDeviceOpsNet =
+{
+    VirtioNetDevAlloc,
+    VirtioNetDevFree,
+    VirtioNetDevAttach,
+    VirtioNetDevDetach
+};
+
+/**
+ * virtio_net_t: Private data per Virtio Device.
+ */
+typedef struct virtio_net_t
+{
+    mac_handle_t        hMac;           /* Handle to the MAC layer. */
+    RTMAC               MacAddr;        /* MAC address. */
+    PVIRTIOQUEUE        pRxQueue;       /* Receive Queue. */
+    PVIRTIOQUEUE        pTxQueue;       /* Xmit Queue. */
+    PVIRTIOQUEUE        pCtrlQueue;     /* Control Queue. */
+    kmem_cache_t       *pTxCache;       /* TX buffer cache. */
+} virtio_net_t;
+
+/**
+ * virtio_txbuf_t: Virtio Net TX buffer.
+ */
+typedef struct virtio_net_txbuf_t
+{
+    ddi_dma_handle_t    hDMA;           /* DMA TX handle. */
+} virtio_net_txbuf_t;
+
+/*
+ * virtio_net_header_t: Virtio Net TX/RX buffer header.
+ */
+typedef struct virtio_net_header_t
+{
+    uint8_t             u8Flags;        /* Flags. */
+    uint8_t             u8GSOType;      /* GSO type. */
+    uint16_t            u16HdrLen;      /* Length of this header. */
+    uint16_t            u16GSOSize;     /* GSO length if applicable. */
+    uint16_t            u16CSumStart;   /* Checksum start.*/
+    uint16_t            u16CSumOffset;  /* Checksum offset.*/
+} virtio_net_header_t;
+
+/**
+ * MAC layer hooks for VirtioNet.
+ */
+static mac_callbacks_t g_VirtioNetCallbacks =
+{
+    MC_GETCAPAB,                        /* Mask of available extra hooks. */
+    VirtioNetStat,
+    VirtioNetStart,
+    VirtioNetStop,
+    VirtioNetSetPromisc,
+    VirtioNetSetMulticast,
+    VirtioNetSetUnicast,
+    VirtioNetXmit,
+    NULL,                               /* Reserved. */
+    NULL,                               /* IOCtl. */
+    VirtioNetGetCapab,
+};
+
+/**
+ * DMA transfer attributes for Xmit/Recv. buffers.
+ */
+static ddi_dma_attr_t g_VirtioNetBufDmaAttr =
+{
+    DMA_ATTR_V0,                    /* Version. */
+    0,                              /* Lowest usable address. */
+    0xffffffffffffffffULL,          /* Highest usable address. */
+    0x7fffffff,                     /* Maximum DMAable byte count. */
+    MMU_PAGESIZE,                   /* 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). */
+};
+
+/**
+ * cb_ops: driver char/block entry points
+ */
+static struct cb_ops g_VirtioNetCbOps =
+{
+    nulldev,                        /* cb open */
+    nulldev,                        /* cb close */
+    nodev,                          /* b strategy */
+    nodev,                          /* b dump */
+    nodev,                          /* b print */
+    nodev,                          /* cb read */
+    nodev,                          /* cb write */
+    nodev,                          /* cb ioctl */
+    nodev,                          /* c devmap */
+    nodev,                          /* c mmap */
+    nodev,                          /* c segmap */
+    nochpoll,                       /* c poll */
+    ddi_prop_op,                    /* property ops */
+    NULL,                           /* streamtab */
+    D_MP,                           /* compat. flag */
+    CB_REV                          /* revision */
+};
+
+/**
+ * dev_ops: driver entry/exit and other ops.
+ */
+static struct dev_ops g_VirtioNetDevOps =
+{
+    DEVO_REV,                       /* driver build revision */
+    0,                              /* ref count */
+    NULL,                           /* get info */
+    nulldev,                        /* identify */
+    nulldev,                        /* probe */
+    VirtioNetAttach,
+    VirtioNetDetach,
+    nodev,                          /* reset */
+    &g_VirtioNetCbOps,
+    (struct bus_ops *)0,
+    nodev                           /* power */
+};
+
+/**
+ * modldrv: export driver specifics to kernel
+ */
+static struct modldrv g_VirtioNetDriver =
+{
+    &mod_driverops,                 /* extern from kernel */
+    DEVICE_DESC_DRV " " VBOX_VERSION_STRING "r"  RT_XSTR(VBOX_SVN_REV),
+    &g_VirtioNetDevOps
+};
+
+/**
+ * modlinkage: export install/remove/info to the kernel
+ */
+static struct modlinkage g_VirtioNetModLinkage =
+{
+    MODREV_1,                       /* loadable module system revision */
+    {
+        &g_VirtioNetDriver,         /* driver framework */
+        NULL                        /* terminate array of linkage structures */
+    }
+};
+
+
+/**
+ * Kernel entry points
+ */
+int _init(void)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":_init\n"));
+
+    /*
+     * Prevent module autounloading.
+     */
+    modctl_t *pModCtl = mod_getctl(&g_VirtioNetModLinkage);
+    if (pModCtl)
+        pModCtl->mod_loadflags |= MOD_NOAUTOUNLOAD;
+    else
+        LogRel((VIRTIOLOGNAME ":failed to disable autounloading!\n"));
+
+    /*
+     * Initialize IPRT.
+     */
+    int rc = RTR0Init(0);
+    if (RT_SUCCESS(rc))
+    {
+        /*
+         * Initialize Solaris specific globals here.
+         */
+        mac_init_ops(&g_VirtioNetDevOps, DEVICE_NAME);
+        rc = mod_install(&g_VirtioNetModLinkage);
+        if (!rc)
+            return rc;
+
+        LogRel((VIRTIOLOGNAME ":mod_install failed. rc=%d\n", rc));
+        mac_fini_ops(&g_VirtioNetDevOps);
+        RTR0Term();
+        return rc;
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":failed to initialize IPRT (rc=%d)\n", rc));
+
+    return RTErrConvertToErrno(rc);
+}
+
+
+int _fini(void)
+{
+    int rc;
+    LogFlowFunc((VIRTIOLOGNAME ":_fini\n"));
+
+    rc = mod_remove(&g_VirtioNetModLinkage);
+    if (!rc)
+    {
+        mac_fini_ops(&g_VirtioNetDevOps);
+        RTR0Term();
+    }
+    return rc;
+}
+
+
+int _info(struct modinfo *pModInfo)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":_info\n"));
+
+    int rc = mod_info(&g_VirtioNetModLinkage, pModInfo);
+
+    LogFlow((VIRTIOLOGNAME ":_info returns %d\n", rc));
+    return rc;
+}
+
+
+/**
+ * Attach entry point, to attach a device to the system or resume it.
+ *
+ * @param   pDip            The module structure instance.
+ * @param   Cmd             Operation type (attach/resume).
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetAttach(dev_info_t *pDip, ddi_attach_cmd_t Cmd)
+{
+    return VirtioAttach(pDip, Cmd, &g_VirtioDeviceOpsNet, &g_VirtioHyperOpsPci);
+}
+
+
+/**
+ * Detach entry point, to detach a device to the system or suspend it.
+ *
+ * @param   pDip            The module structure instance.
+ * @param   Cmd             Operation type (detach/suspend).
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetDetach(dev_info_t *pDip, ddi_detach_cmd_t Cmd)
+{
+    return VirtioDetach(pDip, Cmd);
+}
+
+
+/**
+ * Virtio Net TX buffer constructor for kmem_cache_create().
+ *
+ * @param pvBuf             Pointer to the allocated buffer.
+ * @param pvArg             Opaque private data.
+ * @param fFlags            Propagated KM flag values.
+ *
+ * @return 0 on success, or -1 on failure.
+ */
+static int VirtioNetTxBufCreate(void *pvBuf, void *pvArg, int fFlags)
+{
+    virtio_net_txbuf_t *pTxBuf = pvBuf;
+    PVIRTIODEVICE pDevice = pvArg;
+
+    /** @todo ncookies handles? */
+    int rc = ddi_dma_alloc_handle(pDevice->pDip, &g_VirtioNetBufDmaAttr,
+                                  fFlags & KM_NOSLEEP ? DDI_DMA_DONTWAIT : DDI_DMA_SLEEP,
+                                  0 /* Arg */, &pTxBuf->hDMA);
+    if (rc == DDI_SUCCESS)
+        return 0;
+    return -1;
+}
+
+
+/**
+ * Virtio Net TX buffer destructor for kmem_cache_create().
+ *
+ * @param pvBuf             Pointer to the allocated buffer.
+ * @param pvArg
+ */
+static void VirtioNetTxBufDestroy(void *pvBuf, void *pvArg)
+{
+    NOREF(pvArg);
+    virtio_net_txbuf_t *pTxBuf = pvBuf;
+
+    ddi_dma_free_handle(&pTxBuf->hDMA);
+}
+
+
+/**
+ * Virtio Net private data allocation routine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ *
+ * @return Allocated private data that must only be freed by calling
+ *         VirtioNetDevFree().
+ */
+static void *VirtioNetDevAlloc(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevAlloc pDevice=%p\n", pDevice));
+
+    AssertReturn(pDevice, NULL);
+    virtio_net_t *pNet = RTMemAllocZ(sizeof(virtio_net_t));
+    if (RT_LIKELY(pNet))
+    {
+        /*
+         * Create a kernel memory cache for frequently allocated/deallocated
+         * buffers.
+         */
+        char szCachename[KSTAT_STRLEN];
+        RTStrPrintf(szCachename, sizeof(szCachename), "VirtioNet_Cache_%d", ddi_get_instance(pDevice->pDip));
+        pNet->pTxCache = kmem_cache_create(szCachename,                /* Cache name */
+                                           sizeof(virtio_net_txbuf_t), /* Size of buffers in cache */
+                                           0,                          /* Align */
+                                           VirtioNetTxBufCreate,       /* Buffer constructor */
+                                           VirtioNetTxBufDestroy,      /* Buffer destructor */
+                                           NULL,                       /* pfnReclaim */
+                                           pDevice,                    /* Private data */
+                                           NULL,                       /* "vmp", MBZ (man page) */
+                                           0                           /* "cflags", MBZ (man page) */
+                                           );
+        if (RT_LIKELY(pNet->pTxCache))
+            return pNet;
+        else
+            LogRel((VIRTIOLOGNAME ":kmem_cache_create failed.\n"));
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":failed to alloc %u bytes for Net instance.\n", sizeof(virtio_net_t)));
+
+    return NULL;
+}
+
+
+/**
+ * Virtio Net private data free routine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ */
+static void VirtioNetDevFree(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevFree pDevice=%p\n", pDevice));
+    AssertReturnVoid(pDevice);
+
+    virtio_net_t *pNet = pDevice->pvDevice;
+    kmem_cache_destroy(pNet->pTxCache);
+    RTMemFree(pNet);
+    pDevice->pvDevice = NULL;
+}
+
+
+/**
+ * Virtio Net device attach rountine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetDevAttach(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevAttach pDevice=%p\n", pDevice));
+
+    virtio_net_t *pNet = pDevice->pvDevice;
+    mac_register_t *pMacRegHandle = mac_alloc(MAC_VERSION);
+    if (pMacRegHandle)
+    {
+        pMacRegHandle->m_driver     = pDevice;
+        pMacRegHandle->m_dip        = pDevice->pDip;
+        pMacRegHandle->m_callbacks  = &g_VirtioNetCallbacks;
+        pMacRegHandle->m_type_ident = MAC_PLUGIN_IDENT_ETHER;
+        pMacRegHandle->m_min_sdu    = 0;
+        pMacRegHandle->m_max_sdu    = 1500;    /** @todo verify */
+        /** @todo should we set the margin size? */
+        pMacRegHandle->m_src_addr   = pNet->MacAddr.au8;
+
+        /*
+         * Get MAC from the host or generate a random MAC address.
+         */
+        if (pDevice->fHostFeatures & VIRTIO_NET_MAC)
+        {
+            pDevice->pHyperOps->pfnGet(pDevice, 0 /* offset */, &pNet->MacAddr.au8, sizeof(pNet->MacAddr));
+            LogFlow((VIRTIOLOGNAME ":VirtioNetDevAttach: Obtained MAC address from host: %.6Rhxs\n", pNet->MacAddr.au8));
+        }
+        else
+        {
+            pNet->MacAddr.au8[0] = 0x08;
+            pNet->MacAddr.au8[1] = 0x00;
+            pNet->MacAddr.au8[2] = 0x27;
+            RTRandBytes(&pNet->MacAddr.au8[3], 3);
+            LogFlow((VIRTIOLOGNAME ":VirtioNetDevAttach: Generated MAC address %.6Rhxs\n", pNet->MacAddr.au8));
+        }
+
+        int rc = VirtioNetAttachQueues(pDevice);
+        if (rc == DDI_SUCCESS)
+        {
+            rc = mac_register(pMacRegHandle, &pNet->hMac);
+            if (rc == 0)
+            {
+                mac_link_update(pNet->hMac, LINK_STATE_DOWN);
+                mac_free(pMacRegHandle);
+                LogFlow((VIRTIOLOGNAME ":VirtioNetDevAttach: successfully registered mac.\n"));
+                return DDI_SUCCESS;
+            }
+            else
+                LogRel((VIRTIOLOGNAME ":VirtioNetDevAttach: mac_register failed. rc=%d\n", rc));
+
+            VirtioNetDetachQueues(pDevice);
+        }
+        else
+            LogRel((VIRTIOLOGNAME ":VirtioNetDevAttach: VirtioNetAttachQueues failed. rc=%d\n", rc));
+
+        mac_free(pMacRegHandle);
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioNetDevAttach: mac_alloc failed. Invalid version!?!\n"));
+
+    return DDI_FAILURE;
+}
+
+
+/**
+ * Virtio Net device detach routine.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetDevDetach(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevDetach pDevice=%p\n", pDevice));
+    virtio_net_t *pNet = pDevice->pvDevice;
+
+    int rc = mac_unregister(pNet->hMac);
+    if (rc == 0)
+    {
+        VirtioNetDetachQueues(pDevice);
+        return DDI_SUCCESS;
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioNetDevDetach: mac_unregister failed. rc=%d\n", rc));
+
+    return DDI_FAILURE;
+}
+
+
+/**
+ * Attach the Virtio Net TX, RX and control queues.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetAttachQueues(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioNetAttachQueues pDevice=%p\n", pDevice));
+
+    virtio_net_t *pNet = pDevice->pvDevice;
+
+    pNet->pRxQueue = VirtioGetQueue(pDevice, 0 /* index */ );
+    if (pNet->pRxQueue)
+    {
+        pNet->pTxQueue = VirtioGetQueue(pDevice, 1 /* index */);
+        if (pNet->pTxQueue)
+        {
+            if (pDevice->fHostFeatures & VIRTIO_NET_CTRL_VQ)
+            {
+                pNet->pCtrlQueue = VirtioGetQueue(pDevice, 2 /* index */);
+                if (pNet->pCtrlQueue)
+                {
+                    LogFlow((VIRTIOLOGNAME ":VirtioNetAttachQueues successfully obtained 3 queues.\n"));
+                    return DDI_SUCCESS;
+                }
+                else
+                    LogRel((VIRTIOLOGNAME ":VirtioNetAttachQueues: failed to get Control queue.\n"));
+            }
+            else
+            {
+                LogFlow((VIRTIOLOGNAME ":VirtioNetAttachQueues successfully obtained 2 queues.\n"));
+                return DDI_SUCCESS;
+            }
+
+            VirtioPutQueue(pDevice, pNet->pTxQueue);
+            pNet->pTxQueue = NULL;
+        }
+        else
+            LogRel((VIRTIOLOGNAME ":VirtioNetAttachQueues: failed to get TX queue.\n"));
+
+        VirtioPutQueue(pDevice, pNet->pRxQueue);
+        pNet->pRxQueue = NULL;
+    }
+    else
+        LogRel((VIRTIOLOGNAME ":VirtioNetAttachQueues: failed to get RX queue.\n"));
+
+    return DDI_FAILURE;
+}
+
+
+/**
+ * Detach the Virtio Net TX, RX and control queues.
+ *
+ * @param pDevice           Pointer to the Virtio device instance.
+ */
+static void VirtioNetDetachQueues(PVIRTIODEVICE pDevice)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDetachQueues pDevice=%p\n", pDevice));
+    virtio_net_t *pNet = pDevice->pvDevice;
+
+    if (   pDevice->fHostFeatures & VIRTIO_NET_CTRL_VQ
+        && pNet->pCtrlQueue)
+        VirtioPutQueue(pDevice, pNet->pCtrlQueue);
+
+    if (pNet->pTxCache)
+        VirtioPutQueue(pDevice, pNet->pTxQueue);
+
+    if (pNet->pRxQueue)
+        VirtioPutQueue(pDevice, pNet->pRxQueue);
+}
+
+
+
+/* -=-=-=-=- Virtio Net MAC layer callbacks  -=-=-=-=- */
+
+/**
+ * Virtio Net statistics.
+ *
+ * @param pvArg             Pointer to private data.
+ * @param cmdStat           Which statistics to provide.
+ * @param pu64Val           Where to write statistics data.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetStat(void *pvArg, uint_t cmdStat, uint64_t *pu64Val)
+{
+    NOREF(pvArg);
+    NOREF(cmdStat);
+    NOREF(pu64Val);
+    return ENOTSUP;
+}
+
+
+/**
+ * Virtio Net Start.
+ *
+ * @param pvArg             Pointer to private data.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetStart(void *pvArg)
+{
+    PVIRTIODEVICE pDevice = pvArg;
+    virtio_net_t *pNet = pDevice->pvDevice;
+    mac_link_update(pNet->hMac, LINK_STATE_UP);
+
+    pDevice->pHyperOps->pfnSetStatus(pDevice, VIRTIO_PCI_STATUS_DRV_OK);
+    return 0;
+}
+
+
+/**
+ * Virtio Net Stop.
+ *
+ * @param pvArg             Pointer to private data.
+ */
+static void VirtioNetStop(void *pvArg)
+{
+    PVIRTIODEVICE pDevice = pvArg;
+    virtio_net_t *pNet = pDevice->pvDevice;
+    mac_link_update(pNet->hMac, LINK_STATE_DOWN);
+
+    /*
+     * I don't think we should set status here as the host checks the status on every Xmit. This means pending Xmits
+     * would also be dropped.
+     * @todo: Not sure what's the best way to signal connect/disconnect of the link to the host. Figure it out.
+     */
+}
+
+
+/**
+ * Virtio Net toggle Promiscuous mode.
+ *
+ * @param pvArg             Pointer to private data.
+ * @param fPromiscOn        Promiscuous On/Off.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetSetPromisc(void *pvArg, boolean_t fPromiscOn)
+{
+    NOREF(pvArg);
+    NOREF(fPromiscOn);
+    return 0;
+}
+
+
+/**
+ * Virtio Net set/add multicast address.
+ *
+ * @param pvArg             Pointer to private data.
+ * @param fAdd              Whether to add multicast address or not.
+ * @param pbMac             Pointer to the multicast MAC address to set/add.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetSetMulticast(void *pvArg, boolean_t fAdd, const uint8_t *pbMac)
+{
+    NOREF(pvArg);
+    NOREF(fAdd);
+    NOREF(pbMac);
+    return 1;
+}
+
+
+/**
+ * Virtio Net set unicast address.
+ *
+ * @param pvArg             Pointer to private data.
+ * @param pbMac             Pointer to the unicast MAC address to set.
+ *
+ * @return corresponding solaris error code.
+ */
+static int VirtioNetSetUnicast(void *pvArg, const uint8_t *pbMac)
+{
+    NOREF(pvArg);
+    NOREF(pbMac);
+    return ENOTSUP;
+}
+
+
+/**
+ * Virtio Net get capabilities hook.
+ *
+ * @param pvArg             Pointer to private data.
+ * @param Capab             MAC layer capabilities.
+ * @param pvCapabData       Pointer to store capability info.
+ *
+ * @return B_TRUE upon success, otherwise B_FALSE.
+ */
+static boolean_t VirtioNetGetCapab(void *pvArg, mac_capab_t Capab, void *pvCapabData)
+{
+    NOREF(pvArg);
+    NOREF(Capab);
+    NOREF(pvCapabData);
+    return B_FALSE;
+}
+
+
+/**
+ * Virtio Net Xmit hook.
+ *
+ * @param pvArg             Pointer to private data.
+ * @param pMsg              Pointer to the message.
+ *
+ * @return Pointer to message not Xmited.
+ */
+static mblk_t *VirtioNetXmit(void *pvArg, mblk_t *pMsg)
+{
+    LogFlowFunc((VIRTIOLOGNAME ":VirtioNetXmit pMsg=%p\n", pMsg));
+    cmn_err(CE_NOTE, "Xmit pMsg=%p\n", pMsg);
+
+    PVIRTIODEVICE pDevice = pvArg;
+    virtio_net_t *pNet    = pDevice->pvDevice;
+    bool fNotify          = false;
+
+    while (pMsg)
+    {
+        mblk_t *pNextMsg = pMsg->b_next;
+
+#if 0
+        mblk_t *pHdr = allocb(sizeof(virtio_net_header_t), BPRI_HI);
+        if (RT_UNLIKELY(!pHdr))
+            break;
+
+        virtio_net_header_t *pNetHdr = pHdr->b_rptr;
+        memset(pNetHdr, 0, sizeof(virtio_net_header_t));
+        pNetHdr->u8Flags       = VIRTIO_NET_GUEST_CSUM;
+        pNetHdr->u16HdrLen     = sizeof(virtio_net_header_t);
+
+        pHdr->b_wptr += sizeof(virtio_net_header_t);
+        pHdr->b_cont = pMsg;
+#endif
+
+        virtio_net_txbuf_t *pTxBuf = kmem_cache_alloc(pNet->pTxCache, KM_SLEEP);
+        if (!pTxBuf)
+            break;
+
+        ddi_dma_cookie_t DmaCookie;
+        uint_t cCookies;
+        int rc = ddi_dma_addr_bind_handle(pTxBuf->hDMA, NULL /* addrspace */, (char *)pMsg->b_rptr, MBLKL(pMsg),
+                                          DDI_DMA_WRITE | DDI_DMA_STREAMING, DDI_DMA_SLEEP, 0 /* addr */,
+                                          &DmaCookie, &cCookies);
+        cmn_err(CE_NOTE, "VirtioNetXmit: MBLKL pMsg=%u\n", MBLKL(pMsg));
+        if (rc != DDI_DMA_MAPPED)
+        {
+            LogRel((VIRTIOLOGNAME ":VirtioNetXmit failed to map address to DMA handle. rc=%d\n", rc));
+            kmem_cache_free(pNet->pTxCache, pTxBuf);
+            break;
+        }
+
+        /** @todo get 'cCookies' slots from the ring. */
+
+        for (uint_t i = 0; i < cCookies; i++)
+        {
+            uint16_t fFlags = 0;
+            if (i < cCookies - 1)
+                fFlags |= VIRTIO_FLAGS_RING_DESC_NEXT;
+
+            rc = VirtioRingPush(pNet->pTxQueue, DmaCookie.dmac_laddress, DmaCookie.dmac_size, fFlags);
+            if (RT_FAILURE(rc))
+            {
+                LogRel((VIRTIOLOGNAME ":VirtioNetXmit failed. rc=%Rrc\n", rc));
+                break;
+            }
+
+            ddi_dma_nextcookie(pTxBuf->hDMA, &DmaCookie);
+        }
+
+        pMsg = pNextMsg;
+        fNotify = true;
+        if (RT_FAILURE(rc))
+        {
+            ddi_dma_unbind_handle(pTxBuf->hDMA);
+            break;
+        }
+    }
+
+    if (fNotify)
+        pDevice->pHyperOps->pfnNotifyQueue(pDevice, pNet->pTxQueue);
+
+    return pMsg;
+}
+
+
+/**
+ * Interrupt Service Routine for Virtio Net.
+ *
+ * @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 VirtioNetISR(caddr_t Arg)
+{
+    cmn_err(CE_NOTE, "VirtioNetISR Arg=%p\n", Arg);
+    NOREF(Arg);
+    return DDI_INTR_UNCLAIMED;
+}
+
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..36f69e1b
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.c
@@ -0,0 +1,665 @@
+/* $Id: VirtioPci-solaris.c $ */
+/** @file
+ * VirtualBox Guest Additions - Virtio Driver for Solaris, PCI Hypervisor Interface.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   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;
+}
+
diff --git a/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.h b/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.h
new file mode 100644
index 00000000..5d0aaf0c
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.h
@@ -0,0 +1,48 @@
+/* $Id: VirtioPci-solaris.h $ */
+/** @file
+ * VirtualBox Guest Additions: Virtio Driver for Solaris, PCI Hypervisor Interface.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef GA_INCLUDED_SRC_solaris_Virtio_VirtioPci_solaris_h
+#define GA_INCLUDED_SRC_solaris_Virtio_VirtioPci_solaris_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "Virtio-solaris.h"
+
+extern VIRTIOHYPEROPS g_VirtioHyperOpsPci;
+
+#endif /* !GA_INCLUDED_SRC_solaris_Virtio_VirtioPci_solaris_h */
+
diff --git a/src/VBox/Additions/solaris/Virtio/VirtioRing-solaris.c b/src/VBox/Additions/solaris/Virtio/VirtioRing-solaris.c
new file mode 100644
index 00000000..004075c1
--- /dev/null
+++ b/src/VBox/Additions/solaris/Virtio/VirtioRing-solaris.c
@@ -0,0 +1,148 @@
+/* $Id: VirtioRing-solaris.c $ */
+/** @file
+ * VirtualBox Guest Additions: Virtio Driver for Solaris, Ring implementation.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "Virtio-solaris.h"
+
+#include <iprt/asm.h>
+#include <iprt/cdefs.h>
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+#include <iprt/log.h>
+
+#include <sys/cmn_err.h>
+
+/**
+ * Returns the size of the ring in bytes given the number of elements and
+ * alignment requirements.
+ *
+ * @param cElements         Number of elements.
+ * @param Align             Alignment (must be a power of two).
+ *
+ * @return Size of the Virtio ring.
+ */
+size_t VirtioRingSize(uint64_t cElements, ulong_t Align)
+{
+    size_t cb = 0;
+    cb  = cElements * sizeof(VIRTIORINGDESC);   /* Ring descriptors. */
+    cb += 2 * sizeof(uint16_t);                 /* Available flags and index. */
+    cb += cElements * sizeof(uint16_t);         /* Available descriptors. */
+
+    size_t cbAlign = RT_ALIGN_Z(cb, Align);
+    cbAlign += 2 * sizeof(uint16_t);                    /* Used flags and index. */
+    cbAlign += cElements * sizeof(VIRTIORINGUSEDELEM);  /* Used descriptors. */
+
+    return cbAlign;
+}
+
+
+/**
+ * Initializes a ring of a queue. This associates the DMA virtual address
+ * with the Ring structure's "pRingDesc".
+ *
+ * @param pQueue            Pointer to the Virtio Queue.
+ * @param cDescs            Number of descriptors.
+ * @param virtBuf           Buffer associated with the ring.
+ * @param Align             Alignment (must be power of two).
+ */
+void VirtioRingInit(PVIRTIOQUEUE pQueue, uint_t cDescs, caddr_t virtBuf, ulong_t Align)
+{
+    PVIRTIORING pRing = &pQueue->Ring;
+    pRing->cDesc          = cDescs;
+    pRing->pRingDesc      = (void *)virtBuf;
+    pRing->pRingAvail     = (PVIRTIORINGAVAIL)(virtBuf + (cDescs * sizeof(pRing->pRingDesc[0])));
+    pRing->pRingUsedElem  = RT_ALIGN_PT(pRing->pRingAvail + RT_UOFFSETOF_DYN(VIRTIORINGAVAIL, aRings[pQueue->Ring.cDesc]), Align,
+                                        PVIRTIORINGUSEDELEM);
+
+    for (uint_t i = 0; i < pRing->cDesc - 1; i++)
+        pRing->pRingDesc[i].Next = i + 1;
+
+    pQueue->FreeHeadIndex = 0;
+
+    cmn_err(CE_NOTE, "cDesc=%u pRingDesc=%p pRingAvail=%p\n", pRing->cDesc, pRing->pRingDesc, pRing->pRingAvail);
+}
+
+
+/**
+ * Push a buffer into the ring.
+ *
+ * @param pQueue            Pointer to the Virtio queue.
+ * @param physBuf           Physical address of the buffer.
+ * @param cbBuf             Size of the buffer in bytes.
+ * @param fFlags            Buffer flags, see VIRTIO_FLAGS_RING_DESC_*.
+ *
+ * @return IPRT error code.
+ */
+int VirtioRingPush(PVIRTIOQUEUE pQueue, paddr_t physBuf, uint32_t cbBuf, uint16_t fFlags)
+{
+    /*
+     * Claim a slot, fill the buffer and move head pointer.
+     */
+    uint_t FreeIndex          = pQueue->FreeHeadIndex;
+    PVIRTIORING pRing         = &pQueue->Ring;
+
+    if (FreeIndex >= pRing->cDesc - 1)
+    {
+        LogRel((VIRTIOLOGNAME ":VirtioRingPush: failed. No free descriptors. cDesc=%u\n", pRing->cDesc));
+        return VERR_BUFFER_OVERFLOW;
+    }
+
+    PVIRTIORINGDESC pRingDesc = &pRing->pRingDesc[FreeIndex];
+
+    AssertCompile(sizeof(physBuf) == sizeof(pRingDesc->AddrBuf));
+
+    pQueue->cBufs++;
+    uint_t AvailIndex = (pRing->pRingAvail->Index + pQueue->cBufs) % pQueue->Ring.cDesc;
+    pRing->pRingAvail->aRings[AvailIndex - 1] = FreeIndex;
+
+    pRingDesc->AddrBuf = physBuf;
+    pRingDesc->cbBuf   = cbBuf;
+    pRingDesc->fFlags  = fFlags;
+
+    pQueue->FreeHeadIndex = pRingDesc->Next;
+
+    ASMCompilerBarrier();
+
+    cmn_err(CE_NOTE, "VirtioRingPush: cbBuf=%u FreeIndex=%u AvailIndex=%u cDesc=%u Queue->cBufs=%u\n",
+            cbBuf, FreeIndex, AvailIndex, pQueue->Ring.cDesc,
+            pQueue->cBufs);
+
+    return VINF_SUCCESS;
+}
+