| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, copy, |
| * modify, merge, publish, distribute, sublicense, and/or sell copies |
| * of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #pragma once |
| #include <sys/types.h> |
| |
| /** |
| * struct virtio_mmio_config - VirtIO MMIO Register Layout |
| * @magic: Contains VIRTIO_MMIO_MAGIC, or this is invalid |
| * @version: MMIO Spec Version |
| * @device_id: Type of device. See VIRTIO_DEVICE_ID_* |
| * @vendor_id: Identifies the implementor of the device |
| * @host_features: 32-bits of which features the host supports. |
| * @host_features_sel: Selects which half of the feature vector @host_features |
| * exposes - 0 for low, 1 for high. |
| * @guest_features: 32-bits of which features the guest wants. |
| * @guest_features_sel: Selects which half of the feature vector |
| * @guest_features is writing to. |
| * @queue_sel: Which device queue the guest is configuring |
| * @queue_num_max: The maximum VirtIO queue size supported by the for the |
| * selected queue. |
| * @queue_num: The VirtIO queue size used by the guest for the |
| * selected queue. |
| * @queue_align: Specify the alignment of the queues. Using a value |
| * other than PAGE_SIZE may not be supported. |
| * Must be a power of 2. |
| * @queue_pfn: Page frame number of the virtq_raw struct to be used. |
| * @queue_ready: (Non-Legacy) Writing 1 to this enables the current |
| * queue. Should be poked after using @queue_desc_low and |
| * friends to define the queue. |
| * @queue_notify: Write a queue index here to tell the device to check it |
| * @interrupt_status: Why the most recent interrupt was fired. |
| * * Bit 0 - Used ring updated (device processed a buffer) |
| * * Bit 1 - Config updated |
| * @interrupt_ack: Tell the device an interrupt was handled. Format is the |
| * the same as @interrupt_status |
| * @status: Used to negotiate startup. See VIRTIO_STATUS_*. |
| * Write 0 to reset. |
| * @queue_desc_low: (Non-Legacy) Low 32-bits of descriptor table physaddr. |
| * @queue_desc_high: (Non-Legacy) High 32-bits of descriptor table physaddr. |
| * @queue_avail_low: (Non-Legacy) Low 32-bits of available ring physaddr. |
| * @queue_avail_high: (Non-Legacy) High 32-bits of available ring physaddr. |
| * @queue_used_low: (Non-Legacy) Low 32-bits of used ring physaddr. |
| * @queue_used_high: (Non-Legacy) High 32-bits of used ring physaddr. |
| * @config: Device specific configuration information. |
| */ |
| struct virtio_mmio_config { |
| /* 0x00 */ |
| uint32_t magic; |
| uint32_t version; |
| uint32_t device_id; |
| uint32_t vendor_id; |
| /* 0x10 */ |
| uint32_t host_features; |
| uint32_t host_features_sel; |
| uint32_t __reserved0[2]; |
| /* 0x20 */ |
| uint32_t guest_features; |
| uint32_t guest_features_sel; |
| uint32_t guest_page_size; |
| uint32_t __reserved1[1]; |
| /* 0x30 */ |
| uint32_t queue_sel; |
| uint32_t queue_num_max; |
| uint32_t queue_num; |
| uint32_t queue_align; |
| /* 0x40 */ |
| uint32_t queue_pfn; |
| uint32_t queue_ready; |
| uint32_t __reserved2[2]; |
| /* 0x50 */ |
| uint32_t queue_notify; |
| uint32_t __reserved3[3]; |
| /* 0x60 */ |
| uint32_t interrupt_status; |
| uint32_t interrupt_ack; |
| uint32_t __reserved4[2]; |
| /* 0x70 */ |
| uint32_t status; |
| uint32_t __reserved5[3]; |
| /* 0x80 */ |
| uint32_t queue_desc_low; |
| uint32_t queue_desc_high; |
| uint32_t __reserved6[2]; |
| /* 0x90 */ |
| uint32_t queue_avail_low; |
| uint32_t queue_avail_high; |
| uint32_t __reserved7[2]; |
| /* 0xa0 */ |
| uint32_t queue_used_low; |
| uint32_t queue_used_high; |
| uint8_t __reserved8[0x58]; |
| /* 0x100 */ |
| uint8_t config[0x100]; |
| }; |
| |
| /* Magic value to identify a real VirtIO MMIO region */ |
| #define VIRTIO_MMIO_MAGIC (0x74726976) |
