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Edit File: virtio_pcidev.h
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */ /* * Copyright (C) 2021 Intel Corporation * Author: Johannes Berg <johannes@sipsolutions.net> */ #ifndef _LINUX_VIRTIO_PCIDEV_H #define _LINUX_VIRTIO_PCIDEV_H #include <linux/types.h> /** * enum virtio_pcidev_ops - virtual PCI device operations * @VIRTIO_PCIDEV_OP_CFG_READ: read config space, size is 1, 2, 4 or 8; * the @data field should be filled in by the device (in little endian). * @VIRTIO_PCIDEV_OP_CFG_WRITE: write config space, size is 1, 2, 4 or 8; * the @data field contains the data to write (in little endian). * @VIRTIO_PCIDEV_OP_BAR_READ: read BAR mem/pio, size can be variable; * the @data field should be filled in by the device (in little endian). * @VIRTIO_PCIDEV_OP_BAR_WRITE: write BAR mem/pio, size can be variable; * the @data field contains the data to write (in little endian). * @VIRTIO_PCIDEV_OP_MMIO_MEMSET: memset MMIO, size is variable but * the @data field only has one byte (unlike @VIRTIO_PCIDEV_OP_MMIO_WRITE) * @VIRTIO_PCIDEV_OP_INT: legacy INTx# pin interrupt, the addr field is 1-4 for * the number * @VIRTIO_PCIDEV_OP_MSI: MSI(-X) interrupt, this message basically transports * the 16- or 32-bit write that would otherwise be done into memory, * analogous to the write messages (@VIRTIO_PCIDEV_OP_MMIO_WRITE) above * @VIRTIO_PCIDEV_OP_PME: Dummy message whose content is ignored (and should be * all zeroes) to signal the PME# pin. */ enum virtio_pcidev_ops { VIRTIO_PCIDEV_OP_RESERVED = 0, VIRTIO_PCIDEV_OP_CFG_READ, VIRTIO_PCIDEV_OP_CFG_WRITE, VIRTIO_PCIDEV_OP_MMIO_READ, VIRTIO_PCIDEV_OP_MMIO_WRITE, VIRTIO_PCIDEV_OP_MMIO_MEMSET, VIRTIO_PCIDEV_OP_INT, VIRTIO_PCIDEV_OP_MSI, VIRTIO_PCIDEV_OP_PME, }; /** * struct virtio_pcidev_msg - virtio PCI device operation * @op: the operation to do * @bar: the bar (only with BAR read/write messages) * @reserved: reserved * @size: the size of the read/write (in bytes) * @addr: the address to read/write * @data: the data, normally @size long, but just one byte for * %VIRTIO_PCIDEV_OP_MMIO_MEMSET * * Note: the fields are all in native (CPU) endian, however, the * @data values will often be in little endian (see the ops above.) */ struct virtio_pcidev_msg { __u8 op; __u8 bar; __u16 reserved; __u32 size; __u64 addr; __u8 data[]; }; #endif /* _LINUX_VIRTIO_PCIDEV_H */