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

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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.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Shijith Thotton <sthotton@marvell.com>
Message-Id: <20250103153226.1933479-3-sthotton@marvell.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Shijith Thotton
2025-01-03 21:01:36 +05:30
committed by Michael S. Tsirkin
parent 59e4571229
commit 1629ee1078
1 changed files with 14 additions and 0 deletions
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14
include/uapi/linux/virtio_pci.h
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@@ -116,6 +116,8 @@
#define VIRTIO_PCI_CAP_PCI_CFG 5
/* Additional shared memory capability */
#define VIRTIO_PCI_CAP_SHARED_MEMORY_CFG 8
/* PCI vendor data configuration */
#define VIRTIO_PCI_CAP_VENDOR_CFG 9
/* This is the PCI capability header: */
struct virtio_pci_cap {
@@ -130,6 +132,18 @@ struct virtio_pci_cap {
__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 */