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