virtio-pci: define type and header for PCI vendor data

Added macro definition for VIRTIO_PCI_CAP_VENDOR_CFG to identify the PCI vendor data type in the virtio_pci_cap structure. Defined a new struct virtio_pci_vndr_data for the vendor data capability header as per the specification.

Shijith Thotton committed 1 year ago

Commit 1629ee11 parent 59e45711 file · +14 −0Browse files

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include/uapi/linux/virtio_pci.h+14−0

@@ -116,6 +116,8 @@ · 115 unmodified lines
116	#define VIRTIO_PCI_CAP_PCI_CFG 5	116	#define VIRTIO_PCI_CAP_PCI_CFG 5
117	/* Additional shared memory capability */	117	/* Additional shared memory capability */
118	#define VIRTIO_PCI_CAP_SHARED_MEMORY_CFG 8	118	#define VIRTIO_PCI_CAP_SHARED_MEMORY_CFG 8
		119	/* PCI vendor data configuration */
		120	#define VIRTIO_PCI_CAP_VENDOR_CFG 9
119		121
120	/* This is the PCI capability header: */	122	/* This is the PCI capability header: */
121	struct virtio_pci_cap {	123	struct virtio_pci_cap {
@@ -130,6 +132,18 @@ struct virtio_pci_cap { · 8 unmodified lines
130	__le32 length; /* Length of the structure, in bytes. */	132	__le32 length; /* Length of the structure, in bytes. */
131	};	133	};
132		134
		135	/* This is the PCI vendor data capability header: */
		136	struct virtio_pci_vndr_data {
		137	__u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
		138	__u8 cap_next; /* Generic PCI field: next ptr. */
		139	__u8 cap_len; /* Generic PCI field: capability length */
		140	__u8 cfg_type; /* Identifies the structure. */
		141	__u16 vendor_id; /* Identifies the vendor-specific format. */
		142	/* For Vendor Definition */
		143	/* Pads structure to a multiple of 4 bytes */
		144	/* Reads must not have side effects */
		145	};
		146
133	struct virtio_pci_cap64 {	147	struct virtio_pci_cap64 {
134	struct virtio_pci_cap cap;	148	struct virtio_pci_cap cap;
135	__le32 offset_hi; /* Most sig 32 bits of offset */	149	__le32 offset_hi; /* Most sig 32 bits of offset */