| /* 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 */ |