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| author | Michael S. Tsirkin <mst@redhat.com> | 2014-12-11 14:59:51 +0300 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2015-01-21 08:58:53 +0300 |
| commit | 1fcf0512c9c870e78e1c9898ecb9458593403466 (patch) | |
| tree | 002fa2a03688453e491f2224c31a96c1b3a47be6 /include | |
| parent | 71d70c266c84c4e708bb36b20d0c0a29af42821c (diff) | |
| download | linux-1fcf0512c9c870e78e1c9898ecb9458593403466.tar.xz | |
virtio_pci: modern driver
Lightly tested against qemu.
One thing *not* implemented here is separate mappings
for descriptor/avail/used rings. That's nice to have,
will be done later after we have core support.
This also exposes the PCI layout to userspace, and
adds macros for PCI layout offsets:
QEMU wants it, so why not? Trust, but verify.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/virtio_pci.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h index 4e054235358f..a2b2e1353e30 100644 --- a/include/uapi/linux/virtio_pci.h +++ b/include/uapi/linux/virtio_pci.h @@ -117,10 +117,11 @@ 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 type_and_bar; /* Upper 3 bits: bar. - * Lower 3 is VIRTIO_PCI_CAP_*_CFG. */ + __u8 cfg_type; /* Identifies the structure. */ + __u8 bar; /* Where to find it. */ + __u8 padding[3]; /* Pad to full dword. */ __le32 offset; /* Offset within bar. */ - __le32 length; /* Length. */ + __le32 length; /* Length of the structure, in bytes. */ }; #define VIRTIO_PCI_CAP_BAR_SHIFT 5 |