1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
3 * Copyright (C) 2021 Intel Corporation
4 * Author: Johannes Berg <johannes@sipsolutions.net>
6 #ifndef _UAPI_LINUX_VIRTIO_PCIDEV_H
7 #define _UAPI_LINUX_VIRTIO_PCIDEV_H
8 #include <linux/types.h>
11 * enum virtio_pcidev_ops - virtual PCI device operations
12 * @VIRTIO_PCIDEV_OP_CFG_READ: read config space, size is 1, 2, 4 or 8;
13 * the @data field should be filled in by the device (in little endian).
14 * @VIRTIO_PCIDEV_OP_CFG_WRITE: write config space, size is 1, 2, 4 or 8;
15 * the @data field contains the data to write (in little endian).
16 * @VIRTIO_PCIDEV_OP_BAR_READ: read BAR mem/pio, size can be variable;
17 * the @data field should be filled in by the device (in little endian).
18 * @VIRTIO_PCIDEV_OP_BAR_WRITE: write BAR mem/pio, size can be variable;
19 * the @data field contains the data to write (in little endian).
20 * @VIRTIO_PCIDEV_OP_MMIO_MEMSET: memset MMIO, size is variable but
21 * the @data field only has one byte (unlike @VIRTIO_PCIDEV_OP_MMIO_WRITE)
22 * @VIRTIO_PCIDEV_OP_INT: legacy INTx# pin interrupt, the addr field is 1-4 for
24 * @VIRTIO_PCIDEV_OP_MSI: MSI(-X) interrupt, this message basically transports
25 * the 16- or 32-bit write that would otherwise be done into memory,
26 * analogous to the write messages (@VIRTIO_PCIDEV_OP_MMIO_WRITE) above
27 * @VIRTIO_PCIDEV_OP_PME: Dummy message whose content is ignored (and should be
28 * all zeroes) to signal the PME# pin.
30 enum virtio_pcidev_ops {
31 VIRTIO_PCIDEV_OP_RESERVED = 0,
32 VIRTIO_PCIDEV_OP_CFG_READ,
33 VIRTIO_PCIDEV_OP_CFG_WRITE,
34 VIRTIO_PCIDEV_OP_MMIO_READ,
35 VIRTIO_PCIDEV_OP_MMIO_WRITE,
36 VIRTIO_PCIDEV_OP_MMIO_MEMSET,
43 * struct virtio_pcidev_msg - virtio PCI device operation
44 * @op: the operation to do
45 * @bar: the bar (only with BAR read/write messages)
47 * @size: the size of the read/write (in bytes)
48 * @addr: the address to read/write
49 * @data: the data, normally @size long, but just one byte for
50 * %VIRTIO_PCIDEV_OP_MMIO_MEMSET
52 * Note: the fields are all in native (CPU) endian, however, the
53 * @data values will often be in little endian (see the ops above.)
55 struct virtio_pcidev_msg {
64 #endif /* _UAPI_LINUX_VIRTIO_PCIDEV_H */