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73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
#pragma once
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#include <common/glib.h>
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/**
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* @brief msi消息内容结构体
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*
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*/
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struct msi_msg_t
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{
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uint32_t address_lo;
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uint32_t address_hi;
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uint32_t data;
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};
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struct pci_msi_desc_t
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{
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union
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{
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uint32_t msi_mask; // [PCI MSI] MSI cached mask bits
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uint32_t msix_ctrl; // [PCI MSI-X] MSI-X cached per vector control bits
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};
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struct
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{
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uint8_t is_msix : 1; // [PCI MSI/X] True if MSI-X
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uint8_t can_mask : 1; // [PCI MSI/X] Masking supported?
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uint8_t is_64 : 1; // [PCI MSI/X] Address size: 0=32bit 1=64bit
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} msi_attribute;
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};
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/**
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* @brief msi描述符
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*
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*/
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struct msi_desc_t
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{
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uint16_t irq_num; // 中断向量号
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uint16_t processor; // 定向投递的处理器
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uint16_t edge_trigger; // 是否边缘触发
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uint16_t assert; // 是否高电平触发
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struct pci_device_structure_header_t *pci_dev; // 对应的pci设备的结构体
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struct msi_msg_t msg; // msi消息
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uint16_t msi_index; // msi描述符的index
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struct pci_msi_desc_t pci; // 与pci相关的msi描述符数据
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};
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/**
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* @brief 启用 Message Signaled Interrupts
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*
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* @param header 设备header
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* @param vector 中断向量号
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* @param processor 要投递到的处理器
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* @param edge_trigger 是否边缘触发
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* @param assert 是否高电平触发
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*
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* @return 返回码
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*/
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int pci_enable_msi(struct msi_desc_t * msi_desc);
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/**
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* @brief 禁用指定设备的msi
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*
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* @param header pci header
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* @return int
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*/
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int pci_disable_msi(void *header);
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/**
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* @brief 在已配置好msi寄存器的设备上,使能msi
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*
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* @param header 设备头部
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* @return int 返回码
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*/
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int pci_start_msi(void *header); |