177 lines
6.3 KiB
C
177 lines
6.3 KiB
C
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/* deshab/kernel_api.h - dkm_kernel_api ABI 单一定义来源
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*
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* 整合 CODE/UTSM/include/utsm/dkm.h 与 CODE/DKM/dkm_shared.h 的 ABI 结构体，
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* 消除驱动本地重复定义 dkm_kernel_api 的隐患（CONTRIBUTING.md 硬约束）。
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*
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* 约定：
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* - 字段顺序/类型不可调整，UTSM 端按固定偏移填充。
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* - 新增字段只允许追加在结构末尾（尾部追加保持 ABI 兼容）。
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* - 结构体同时提供 typedef 名与 struct 标签，兼容两种引用方式。
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*
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* 偏移常量（供不便解引用 kernel_api 指针的场景使用，消除硬编码）：
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* DSB_KAPI_OFF_NET 0x48 net API 指针
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* DSB_KAPI_OFF_BLOCK 0xA8 block API 指针
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*/
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#ifndef DESHAB_KERNEL_API_H
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#define DESHAB_KERNEL_API_H
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#include "types.h"
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#define DKM_KERNEL_API_VERSION 1u
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/* ---- 网卡链路/能力标志 ---- */
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#define DKM_NET_F_LINK_UP (1u << 0)
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#define DKM_NET_F_TX_READY (1u << 1)
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#define DKM_NET_F_RX_READY (1u << 2)
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#define DKM_NET_F_WIRELESS (1u << 3)
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/* ---- WiFi 扫描加密类型 ---- */
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#define DKM_NET_SEC_OPEN 0u
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#define DKM_NET_SEC_WEP 1u
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#define DKM_NET_SEC_WPA 2u
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#define DKM_NET_SEC_WPA2 3u
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#define DKM_NET_SEC_WPA3 4u
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/* ---- log API ---- */
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typedef struct dkm_log_api {
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void (*info)(const char *msg);
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void (*warn)(const char *msg);
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void (*error)(const char *msg);
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void (*panic)(const char *msg);
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} dkm_log_api;
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/* ---- DMA API ---- */
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typedef struct dkm_dma_buffer {
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void *virt;
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u64 phys;
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u64 size;
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} dkm_dma_buffer;
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typedef struct dkm_dma_api {
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int (*alloc_pages)(u64 page_count, u64 alignment, u64 max_phys, dkm_dma_buffer *out);
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} dkm_dma_api;
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/* ---- net API ---- */
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typedef struct dkm_net_scan_result {
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char ssid[33];
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u8 bssid[6];
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u8 channel;
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i8 rssi;
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u8 security;
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} dkm_net_scan_result;
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typedef struct dkm_net_device_desc {
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const char *name;
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u8 mac[6];
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u32 flags;
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void *ctx;
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int (*tx)(void *ctx, const void *packet, u32 length);
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int (*rx_poll)(void *ctx, void *buffer, u32 capacity, u32 *out_length);
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/* 无线扩展回调（有线驱动置 NULL，向后兼容）。 */
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int (*scan_start)(void *ctx);
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int (*scan_count)(void *ctx);
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int (*scan_result)(void *ctx, u32 n, dkm_net_scan_result *out);
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int (*is_wireless)(void *ctx);
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} dkm_net_device_desc;
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typedef struct dkm_net_stats {
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u64 tx_ok;
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u64 tx_err;
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u64 rx_ok;
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u64 rx_err;
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u64 rx_overflow;
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u64 link_changes;
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} dkm_net_stats;
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typedef struct dkm_net_api {
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int (*register_device)(const dkm_net_device_desc *desc);
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u32 (*device_count)(void);
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int (*device_info)(u32 index, void *out);
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int (*tx)(u32 index, const void *packet, u32 length);
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int (*rx_poll)(u32 index, void *buffer, u32 capacity, u32 *out_length);
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int (*scan_start)(u32 index);
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int (*scan_count)(u32 index);
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int (*scan_result)(u32 index, u32 n, dkm_net_scan_result *out);
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int (*is_wireless)(u32 index);
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int (*device_stats)(u32 index, dkm_net_stats *out);
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} dkm_net_api;
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/* ---- block API ---- */
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typedef int (*dkm_block_read_fn)(void *ctx, u64 lba, u32 count, void *buffer);
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typedef int (*dkm_block_write_fn)(void *ctx, u64 lba, u32 count, const void *buffer);
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typedef struct dkm_block_device_desc {
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const char *name;
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u64 sector_size;
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u64 sector_count;
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void *ctx;
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int (*read)(void *ctx, u64 lba, u32 count, void *buffer);
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int (*write)(void *ctx, u64 lba, u32 count, const void *buffer);
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} dkm_block_device_desc;
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typedef struct dkm_block_api {
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int (*register_device)(const dkm_block_device_desc *desc);
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u32 (*device_count)(void);
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int (*read)(u32 index, u64 lba, u32 count, void *buffer);
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int (*write)(u32 index, u64 lba, u32 count, const void *buffer);
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u64 (*sector_size)(u32 index);
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const char *(*device_name)(u32 index);
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int (*set_write_fn)(u32 index, dkm_block_write_fn fn);
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} dkm_block_api;
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/* ---- MMIO / 页表 API ----
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* 与 UTSM/include/utsm/paging.h 布局一致。 */
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typedef struct dkm_mmio_api {
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int (*is_mapped)(u64 vaddr); /* 返回 0=未映射；1=4K PTE；2=2M PDE；3=1G PDPTE */
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int (*map_mmio)(u64 phys, u64 size); /* 映射到 hhdm_offset + phys，返回 0 成功 */
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u64 (*cr3)(void); /* 当前 CR3 物理地址（诊断用） */
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} dkm_mmio_api;
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/* ---- kernel_api 主结构 ----
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* 字段顺序/类型不可调整 - UTSM 端按固定偏移填充。
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* DSK 以 api+0xA8 硬偏移读取 block，net_stack 以 api+0x48 读取 net。 */
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typedef struct dkm_kernel_api {
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u32 version;
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u32 size;
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u64 feature_bits;
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const dkm_log_api *log;
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const void *mem;
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const void *utsm;
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const void *irq;
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const void *pci;
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const dkm_dma_api *dma;
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const void *vfs;
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const dkm_net_api *net;
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const void *timer;
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const void *drr;
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const void *rsdp_address; /* ACPI RSDP physical address */
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const void *fb_address; /* framebuffer base */
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u64 fb_width;
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u64 fb_height;
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u64 fb_pitch;
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u16 fb_bpp;
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const void *boot_modules_response; /* limine_module_response* */
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int (*irq_register)(u8 irq, void *handler); /* kernel irq_register */
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u64 hhdm_offset; /* physical -> virtual */
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const dkm_block_api *block; /* block provider registry */
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const dkm_mmio_api *mmio; /* 页表/高位 MMIO 映射服务 */
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/* -- 新增字段只允许追加在末尾 -- */
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void *(*mm_map_mmio)(u64 phys, u64 size); /* MMIO 独立窗口映射（PCD|PWT），失败返回 0 */
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void (*mm_unmap_mmio)(void *virt, u64 size); /* 解除 MMIO 独立窗口映射 */
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/* B7 阶段2: LAPIC EOI 钩子注册（apic.drv LAPIC 接管时调用）。 */
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void (*register_apic_eoi)(void (*eoi_fn)(void));
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/* B7 阶段3: 动态 IDT 向量分配器（MSI/MSI-X 用），池 0x40-0xDF。 */
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int (*irq_vector_alloc)(void);
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void (*irq_vector_free)(int vector);
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} dkm_kernel_api;
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/* ---- kernel_api 字段偏移常量（消除散落的硬编码偏移） ----
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* 供不便通过结构体解引用的场景（如早期 boot context 解析）使用。
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* 常规代码应直接通过 api->net / api->block 访问。 */
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#define DSB_KAPI_OFF_NET 0x48u /* const dkm_net_api *net */
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#define DSB_KAPI_OFF_BLOCK 0xA8u /* const dkm_block_api *block */
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#endif /* DESHAB_KERNEL_API_H */
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