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62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _LINUX_VIRTIO_LIGHT_H
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#define _LINUX_VIRTIO_LIGHT_H
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/*
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* Virtio device common config offset
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*/
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/* Magic value ("virt" string) - Read Only */
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#define VIRTIO_LIGHT_MAGIC_VALUE 0x000
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/* Virtio device version - Read Only */
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#define VIRTIO_LIGHT_VERSION 0x004
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/* Virtio device ID - Read Only */
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#define VIRTIO_LIGHT_DEVICE_ID 0x008
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/* Virtio vendor ID - Read Only */
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#define VIRTIO_LIGHT_VENDOR_ID 0x00C
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/* Device status register - Read Write */
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#define VIRTIO_LIGHT_STATUS 0x010
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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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/* Low 32 bits */
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#define VIRTIO_LIGHT_DEVICE_FEATURES_LOW 0x014
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/* High 32bits */
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#define VIRTIO_LIGHT_DEVICE_FEATURES_HIGH 0x018
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/* Maximum size of the currently selected queue - Read Only */
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#define VIRTIO_LIGHT_QUEUE_SIZE_MAX 0x01C
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/* Queue size for the currently selected queue - Write Only */
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#define VIRTIO_LIGHT_QUEUE_SIZE 0x020
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/* Used Ring alignment for the currently selected queue - Write Only */
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#define VIRTIO_LIGHT_QUEUE_ALIGN 0x024
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/* Numbers of virt queue */
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#define VIRTIO_LIGHT_QUEUE_NUM 0x028
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/* Guest's PFN for the queue with number index - Read Write
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* Please notes, if some virtual device support multiple vqs,
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* it will occupy more config space size(vq_num*4). So we
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* should reserve more space starting from this offset.
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* eg, Offset between 0x2C~0x100 is for QUEUE_PFN config space.
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*/
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#define VIRTIO_LIGHT_QUEUE_PFN 0x2C
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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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#define VIRTIO_LIGHT_CONFIG 0x100
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#define VIRTIO_LIGHT_CONFIG_LEN 0x1000
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#endif
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