c7107fc4d6
This commit adds the API for accessing VIRTIO devices, and adds a driver for a VIRTIO PCIE device based on the newly added API. This commit is based on the Virtual I/O Device (VIRTIO) Version 1.3 specification: https://docs.oasis-open.org/virtio/virtio/v1.3/csd01/virtio-v1.3-csd01.pdf Signed-off-by: Jakub Michalski <jmichalski@antmicro.com> Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* Copyright (c) 2025 Antmicro <www.antmicro.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_VIRTIO_VIRTIO_COMMON_H_
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#define ZEPHYR_VIRTIO_VIRTIO_COMMON_H_
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#define DEVICE_STATUS_ACKNOWLEDGE 0
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#define DEVICE_STATUS_DRIVER 1
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#define DEVICE_STATUS_DRIVER_OK 2
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#define DEVICE_STATUS_FEATURES_OK 3
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#define DEVICE_STATUS_NEEDS_RESET 6
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#define DEVICE_STATUS_FAILED 7
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#define VIRTIO_F_VERSION_1 32
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/* Ranges of feature bits for specific device types (see spec 2.2)*/
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#define DEV_TYPE_FEAT_RANGE_0_BEGIN 0
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#define DEV_TYPE_FEAT_RANGE_0_END 23
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#define DEV_TYPE_FEAT_RANGE_1_BEGIN 50
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#define DEV_TYPE_FEAT_RANGE_1_END 127
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/*
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* While defined separately in 4.1.4.5 for PCI and in 4.2.2 for MMIO
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* the same bits are responsible for the same interrupts, so defines
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* with them can be unified
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*/
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#define VIRTIO_QUEUE_INTERRUPT 1
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#define VIRTIO_DEVICE_CONFIGURATION_INTERRUPT 2
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/**
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* Common virtio isr
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*
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* @param dev virtio device it operates on
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* @param isr_status value of isr status register
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* @param virtqueue_count amount of available virtqueues
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*/
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void virtio_isr(const struct device *dev, uint8_t isr_status, uint16_t virtqueue_count);
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#endif /*ZEPHYR_VIRTIO_VIRTIO_COMMON_H_*/
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