130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2018, Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*
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* From Linux kernel include/uapi/linux/virtio_mmio.h
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*/
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#ifndef _LINUX_VIRTIO_MMIO_H
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#define _LINUX_VIRTIO_MMIO_H
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/* Control registers */
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/* Magic value ("virt" string) - Read Only */
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#define VIRTIO_MMIO_MAGIC_VALUE 0x000
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/* Virtio device version - Read Only */
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#define VIRTIO_MMIO_VERSION 0x004
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/* Virtio device ID - Read Only */
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#define VIRTIO_MMIO_DEVICE_ID 0x008
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/* Virtio vendor ID - Read Only */
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#define VIRTIO_MMIO_VENDOR_ID 0x00c
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/*
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* Bitmask of the features supported by the device (host)
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* (32 bits per set) - Read Only
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*/
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#define VIRTIO_MMIO_DEVICE_FEATURES 0x010
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/* Device (host) features set selector - Write Only */
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#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014
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/*
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* Bitmask of features activated by the driver (guest)
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* (32 bits per set) - Write Only
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*/
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#define VIRTIO_MMIO_DRIVER_FEATURES 0x020
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/* Activated features set selector - Write Only */
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#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024
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#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */
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/* Guest's memory page size in bytes - Write Only */
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#define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028
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#endif
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/* Queue selector - Write Only */
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#define VIRTIO_MMIO_QUEUE_SEL 0x030
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/* Maximum size of the currently selected queue - Read Only */
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#define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034
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/* Queue size for the currently selected queue - Write Only */
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#define VIRTIO_MMIO_QUEUE_NUM 0x038
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#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */
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/* Used Ring alignment for the currently selected queue - Write Only */
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#define VIRTIO_MMIO_QUEUE_ALIGN 0x03c
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/* Guest's PFN for the currently selected queue - Read Write */
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#define VIRTIO_MMIO_QUEUE_PFN 0x040
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#endif
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/* Ready bit for the currently selected queue - Read Write */
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#define VIRTIO_MMIO_QUEUE_READY 0x044
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/* Queue notifier - Write Only */
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#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
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/* Interrupt status - Read Only */
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#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
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/* Interrupt acknowledge - Write Only */
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#define VIRTIO_MMIO_INTERRUPT_ACK 0x064
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/* Device status register - Read Write */
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#define VIRTIO_MMIO_STATUS 0x070
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/* Selected queue's Descriptor Table address, 64 bits in two halves */
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#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080
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#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084
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/* Selected queue's Available Ring address, 64 bits in two halves */
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#define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090
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#define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094
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/* Selected queue's Used Ring address, 64 bits in two halves */
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#define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0
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#define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4
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/* Configuration atomicity value */
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#define VIRTIO_MMIO_CONFIG_GENERATION 0x0fc
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/*
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* The config space is defined by each driver as
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* the per-driver configuration space - Read Write
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*/
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#define VIRTIO_MMIO_CONFIG 0x100
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/* Interrupt flags (re: interrupt status & acknowledge registers) */
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#define VIRTIO_MMIO_INT_VRING BIT(0)
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#define VIRTIO_MMIO_INT_CONFIG BIT(1)
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/*
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* The alignment to use between consumer and producer parts of vring.
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* Currently hardcoded to the page size.
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*/
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#define PAGE_SHIFT 12
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#define VIRTIO_MMIO_VRING_ALIGN PAGE_SIZE
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/**
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* virtio mmio transport driver private data
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*
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* @base: mmio transport device register base
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* @version: mmio transport device version
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*/
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struct virtio_mmio_priv {
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void __iomem *base;
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u32 version;
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};
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#endif /* _LINUX_VIRTIO_MMIO_H */
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