/* A 32-bit r/o bitmask of the features supported by the host */ #define VIRTIO_PCI_HOST_FEATURES 0
/* A 32-bit r/w bitmask of features activated by the guest */ #define VIRTIO_PCI_GUEST_FEATURES 4
/* A 32-bit r/w PFN for the currently selected queue */ #define VIRTIO_PCI_QUEUE_PFN 8
/* A 16-bit r/o queue size for the currently selected queue */ #define VIRTIO_PCI_QUEUE_NUM 12
/* A 16-bit r/w queue selector */ #define VIRTIO_PCI_QUEUE_SEL 14
/* A 16-bit r/w queue notifier */ #define VIRTIO_PCI_QUEUE_NOTIFY 16
/* An 8-bit device status register. */ #define VIRTIO_PCI_STATUS 18
/* An 8-bit r/o interrupt status register. Reading the value will return the *currentcontentsoftheISRandwillalsoclearit.Thisiseffectively
* a read-and-acknowledge. */ #define VIRTIO_PCI_ISR 19
/* MSI-X registers: only enabled if MSI-X is enabled. */ /* A 16-bit vector for configuration changes. */ #define VIRTIO_MSI_CONFIG_VECTOR 20 /* A 16-bit vector for selected queue notifications. */ #define VIRTIO_MSI_QUEUE_VECTOR 22
/* The remaining space is defined by each driver as the per-driver
* configuration space */ #define VIRTIO_PCI_CONFIG_OFF(msix_enabled) ((msix_enabled) ? 24 : 20) /* Deprecated: please use VIRTIO_PCI_CONFIG_OFF instead */ #define VIRTIO_PCI_CONFIG(dev) VIRTIO_PCI_CONFIG_OFF((dev)->msix_enabled)
/* Virtio ABI version, this must match exactly */ #define VIRTIO_PCI_ABI_VERSION 0
/* How many bits to shift physical queue address written to QUEUE_PFN.
* 12 is historical, and due to x86 page size. */ #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
/* The alignment to use between consumer and producer parts of vring.
* x86 pagesize again. */ #define VIRTIO_PCI_VRING_ALIGN 4096
#endif/* VIRTIO_PCI_NO_LEGACY */
/* The bit of the ISR which indicates a device configuration change. */ #define VIRTIO_PCI_ISR_CONFIG 0x2 /* Vector value used to disable MSI for queue */ #define VIRTIO_MSI_NO_VECTOR 0xffff
#ifndef VIRTIO_PCI_NO_MODERN
/* IDs for different capabilities. Must all exist. */
/* This is the PCI capability header: */ struct virtio_pci_cap {
__u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
__u8 cap_next; /* Generic PCI field: next ptr. */
__u8 cap_len; /* Generic PCI field: capability length */
__u8 cfg_type; /* Identifies the structure. */
__u8 bar; /* Where to find it. */
__u8 id; /* Multiple capabilities of the same type */
__u8 padding[2]; /* Pad to full dword. */
__le32 offset; /* Offset within bar. */
__le32 length; /* Length of the structure, in bytes. */
};
/* This is the PCI vendor data capability header: */ struct virtio_pci_vndr_data {
__u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
__u8 cap_next; /* Generic PCI field: next ptr. */
__u8 cap_len; /* Generic PCI field: capability length */
__u8 cfg_type; /* Identifies the structure. */
__u16 vendor_id; /* Identifies the vendor-specific format. */ /* For Vendor Definition */ /* Pads structure to a multiple of 4 bytes */ /* Reads must not have side effects */
};
struct virtio_pci_cap64 { struct virtio_pci_cap cap;
__le32 offset_hi; /* Most sig 32 bits of offset */
__le32 length_hi; /* Most sig 32 bits of length */
};
struct virtio_admin_cmd_notify_info_data {
__u8 flags; /* 0 = end of list, 1 = owner device, 2 = member device */
__u8 bar; /* BAR of the member or the owner device */
__u8 padding[6];
__le64 offset; /* Offset within bar. */
};
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