virtio_pci_common.h File Reference

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Macros
#define	ioread8(vdev, addr)    vdev->system->vdev_read_byte((ULONG_PTR)(addr))
#define	ioread16(vdev, addr)    vdev->system->vdev_read_word((ULONG_PTR)(addr))
#define	ioread32(vdev, addr)    vdev->system->vdev_read_dword((ULONG_PTR)(addr))
#define	iowrite8(vdev, val, addr)    vdev->system->vdev_write_byte((ULONG_PTR)(addr), val)
#define	iowrite16(vdev, val, addr)    vdev->system->vdev_write_word((ULONG_PTR)(addr), val)
#define	iowrite32(vdev, val, addr)    vdev->system->vdev_write_dword((ULONG_PTR)(addr), val)
#define	iowrite64_twopart(vdev, val, lo_addr, hi_addr)
#define	mem_alloc_contiguous_pages(vdev, size)    vdev->system->mem_alloc_contiguous_pages(vdev->DeviceContext, size)
#define	mem_free_contiguous_pages(vdev, virt)    vdev->system->mem_free_contiguous_pages(vdev->DeviceContext, virt)
#define	mem_get_physical_address(vdev, virt)    vdev->system->mem_get_physical_address(vdev->DeviceContext, virt)
#define	mem_alloc_nonpaged_block(vdev, size)    vdev->system->mem_alloc_nonpaged_block(vdev->DeviceContext, size)
#define	mem_free_nonpaged_block(vdev, addr)    vdev->system->mem_free_nonpaged_block(vdev->DeviceContext, addr)
#define	pci_read_config_byte(vdev, where, bVal)    vdev->system->pci_read_config_byte(vdev->DeviceContext, where, bVal)
#define	pci_read_config_word(vdev, where, wVal)    vdev->system->pci_read_config_word(vdev->DeviceContext, where, wVal)
#define	pci_read_config_dword(vdev, where, dwVal)    vdev->system->pci_read_config_dword(vdev->DeviceContext, where, dwVal)
#define	pci_get_resource_len(vdev, bar)    vdev->system->pci_get_resource_len(vdev->DeviceContext, bar)
#define	pci_map_address_range(vdev, bar, offset, maxlen)    vdev->system->pci_map_address_range(vdev->DeviceContext, bar, offset, maxlen)
#define	vdev_get_msix_vector(vdev, queue)    vdev->system->vdev_get_msix_vector(vdev->DeviceContext, queue)
#define	vdev_sleep(vdev, msecs)    vdev->system->vdev_sleep(vdev->DeviceContext, msecs)

Functions
void	vp_notify (struct virtqueue *vq)
NTSTATUS	vio_legacy_initialize (VirtIODevice *vdev)
NTSTATUS	vio_modern_initialize (VirtIODevice *vdev)

Macro Definition Documentation

ioread16

#define ioread16	(		vdev,
			addr
	)		vdev->system->vdev_read_word((ULONG_PTR)(addr))

Definition at line 40 of file virtio_pci_common.h.

ioread32

#define ioread32	(		vdev,
			addr
	)		vdev->system->vdev_read_dword((ULONG_PTR)(addr))

Definition at line 42 of file virtio_pci_common.h.

ioread8

#define ioread8	(		vdev,
			addr
	)		vdev->system->vdev_read_byte((ULONG_PTR)(addr))

Definition at line 38 of file virtio_pci_common.h.

iowrite16

#define iowrite16	(		vdev,
			val,
			addr
	)		vdev->system->vdev_write_word((ULONG_PTR)(addr), val)

Definition at line 46 of file virtio_pci_common.h.

iowrite32

#define iowrite32	(		vdev,
			val,
			addr
	)		vdev->system->vdev_write_dword((ULONG_PTR)(addr), val)

Definition at line 48 of file virtio_pci_common.h.

iowrite64_twopart

#define iowrite64_twopart	(		vdev,
			val,
			lo_addr,
			hi_addr
	)

Value:

    vdev->system->vdev_write_dword((ULONG_PTR)(lo_addr), (u32)(val)); \
    vdev->system->vdev_write_dword((ULONG_PTR)(hi_addr), (val) >> 32)

Definition at line 50 of file virtio_pci_common.h.

iowrite8

#define iowrite8	(		vdev,
			val,
			addr
	)		vdev->system->vdev_write_byte((ULONG_PTR)(addr), val)

Definition at line 44 of file virtio_pci_common.h.

mem_alloc_contiguous_pages

#define mem_alloc_contiguous_pages	(		vdev,
			size
	)		vdev->system->mem_alloc_contiguous_pages(vdev->DeviceContext, size)

Definition at line 54 of file virtio_pci_common.h.

mem_alloc_nonpaged_block

#define mem_alloc_nonpaged_block	(		vdev,
			size
	)		vdev->system->mem_alloc_nonpaged_block(vdev->DeviceContext, size)

Definition at line 60 of file virtio_pci_common.h.

mem_free_contiguous_pages

#define mem_free_contiguous_pages	(		vdev,
			virt
	)		vdev->system->mem_free_contiguous_pages(vdev->DeviceContext, virt)

Definition at line 56 of file virtio_pci_common.h.

mem_free_nonpaged_block

#define mem_free_nonpaged_block	(		vdev,
			addr
	)		vdev->system->mem_free_nonpaged_block(vdev->DeviceContext, addr)

Definition at line 62 of file virtio_pci_common.h.

mem_get_physical_address

#define mem_get_physical_address	(		vdev,
			virt
	)		vdev->system->mem_get_physical_address(vdev->DeviceContext, virt)

Definition at line 58 of file virtio_pci_common.h.

pci_get_resource_len

#define pci_get_resource_len	(		vdev,
			bar
	)		vdev->system->pci_get_resource_len(vdev->DeviceContext, bar)

Definition at line 72 of file virtio_pci_common.h.

pci_map_address_range

#define pci_map_address_range	(		vdev,
			bar,
			offset,
			maxlen
	)		vdev->system->pci_map_address_range(vdev->DeviceContext, bar, offset, maxlen)

Definition at line 74 of file virtio_pci_common.h.

pci_read_config_byte

#define pci_read_config_byte	(		vdev,
			where,
			bVal
	)		vdev->system->pci_read_config_byte(vdev->DeviceContext, where, bVal)

Definition at line 65 of file virtio_pci_common.h.

pci_read_config_dword

#define pci_read_config_dword	(		vdev,
			where,
			dwVal
	)		vdev->system->pci_read_config_dword(vdev->DeviceContext, where, dwVal)

Definition at line 69 of file virtio_pci_common.h.

pci_read_config_word

#define pci_read_config_word	(		vdev,
			where,
			wVal
	)		vdev->system->pci_read_config_word(vdev->DeviceContext, where, wVal)

Definition at line 67 of file virtio_pci_common.h.

vdev_get_msix_vector

#define vdev_get_msix_vector	(		vdev,
			queue
	)		vdev->system->vdev_get_msix_vector(vdev->DeviceContext, queue)

Definition at line 77 of file virtio_pci_common.h.

vdev_sleep

#define vdev_sleep	(		vdev,
			msecs
	)		vdev->system->vdev_sleep(vdev->DeviceContext, msecs)

Definition at line 79 of file virtio_pci_common.h.

Function Documentation

vio_legacy_initialize()

NTSTATUS vio_legacy_initialize

(

VirtIODevice *

vdev

)

Definition at line 269 of file VirtIOPCILegacy.c.

{
    size_t length = pci_get_resource_len(vdev, 0);
    vdev->addr = (ULONG_PTR)pci_map_address_range(vdev, 0, 0, length);
 
    if (!vdev->addr) {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    vdev->isr = (u8 *)vdev->addr + VIRTIO_PCI_ISR;
 
    vdev->device = &virtio_pci_device_ops;
 
    return STATUS_SUCCESS;
}

Referenced by virtio_device_initialize().

vio_modern_initialize()

NTSTATUS vio_modern_initialize

(

VirtIODevice *

vdev

)

Definition at line 516 of file VirtIOPCIModern.c.

{
    int capabilities[VIRTIO_PCI_CAP_PCI_CFG];
 
    u32 notify_length;
    u32 notify_offset;
 
    RtlZeroMemory(capabilities, sizeof(capabilities));
    find_pci_vendor_capabilities(vdev, capabilities, VIRTIO_PCI_CAP_PCI_CFG);
 
    /* Check for a common config, if not found use legacy mode */
    if (!capabilities[VIRTIO_PCI_CAP_COMMON_CFG]) {
        DPrintf(0, "%s(%p): device not found\n", __FUNCTION__, vdev);
        return STATUS_DEVICE_NOT_CONNECTED;
    }
 
    /* Check isr and notify caps, if not found fail */
    if (!capabilities[VIRTIO_PCI_CAP_ISR_CFG] || !capabilities[VIRTIO_PCI_CAP_NOTIFY_CFG]) {
        DPrintf(0, "%s(%p): missing capabilities %i/%i/%i\n",
            __FUNCTION__, vdev,
            capabilities[VIRTIO_PCI_CAP_COMMON_CFG],
            capabilities[VIRTIO_PCI_CAP_ISR_CFG],
            capabilities[VIRTIO_PCI_CAP_NOTIFY_CFG]);
        return STATUS_INVALID_PARAMETER;
    }
 
    /* Map bars according to the capabilities */
    vdev->common = vio_modern_map_simple_capability(vdev,
        capabilities[VIRTIO_PCI_CAP_COMMON_CFG],
        sizeof(struct virtio_pci_common_cfg), 4);
    if (!vdev->common) {
        return STATUS_INVALID_PARAMETER;
    }
 
    vdev->isr = vio_modern_map_simple_capability(vdev,
        capabilities[VIRTIO_PCI_CAP_ISR_CFG],
        sizeof(u8), 1);
    if (!vdev->isr) {
        return STATUS_INVALID_PARAMETER;
    }
 
    /* Read notify_off_multiplier from config space. */
    pci_read_config_dword(vdev,
        capabilities[VIRTIO_PCI_CAP_NOTIFY_CFG] + offsetof(struct virtio_pci_notify_cap,
        notify_off_multiplier),
        &vdev->notify_offset_multiplier);
 
    /* Read notify length and offset from config space. */
    pci_read_config_dword(vdev,
        capabilities[VIRTIO_PCI_CAP_NOTIFY_CFG] + offsetof(struct virtio_pci_notify_cap,
        cap.length),
        &notify_length);
    pci_read_config_dword(vdev,
        capabilities[VIRTIO_PCI_CAP_NOTIFY_CFG] + offsetof(struct virtio_pci_notify_cap,
        cap.offset),
        &notify_offset);
 
    /* Map the notify capability if it's small enough.
     * Otherwise, map each VQ individually later.
     */
    if (notify_length + (notify_offset % PAGE_SIZE) <= PAGE_SIZE) {
        vdev->notify_base = vio_modern_map_capability(vdev,
            capabilities[VIRTIO_PCI_CAP_NOTIFY_CFG], 2, 2,
            0, notify_length,
            &vdev->notify_len);
        if (!vdev->notify_base) {
            return STATUS_INVALID_PARAMETER;
        }
    } else {
        vdev->notify_map_cap = capabilities[VIRTIO_PCI_CAP_NOTIFY_CFG];
    }
 
    /* Map the device config capability, the PAGE_SIZE size is a guess */
    if (capabilities[VIRTIO_PCI_CAP_DEVICE_CFG]) {
        vdev->config = vio_modern_map_capability(vdev,
            capabilities[VIRTIO_PCI_CAP_DEVICE_CFG], 0, 4,
            0, PAGE_SIZE,
            &vdev->config_len);
        if (!vdev->config) {
            return STATUS_INVALID_PARAMETER;
        }
    }
 
    vdev->device = &virtio_pci_device_ops;
 
    return STATUS_SUCCESS;
}

Referenced by virtio_device_initialize().

vp_notify()

void vp_notify

(

struct virtqueue *

vq

)

Definition at line 393 of file VirtIOPCICommon.c.

{
    /* we write the queue's selector into the notification register to
     * signal the other end */
    iowrite16(vq->vdev, (unsigned short)vq->index, vq->notification_addr);
    DPrintf(6, "virtio: vp_notify vq->index = %x\n", vq->index);
}

Referenced by vio_legacy_setup_vq(), and vio_modern_setup_vq().