5 #include <lunaix/ds/llist.h>
6 #include <lunaix/types.h>
8 #define PCI_CONFIG_ADDR 0xcf8
9 #define PCI_CONFIG_DATA 0xcfc
12 #define PCI_TPCIBRIDGE 0x1
13 #define PCI_TCARDBRIDGE 0x2
15 #define PCI_VENDOR_INVLD 0xffff
17 #define PCI_REG_VENDOR_DEV 0
18 #define PCI_REG_STATUS_CMD 0x4
19 #define PCI_REG_BAR(num) (0x10 + (num - 1) * 4)
21 #define PCI_DEV_VENDOR(x) ((x)&0xffff)
22 #define PCI_DEV_DEVID(x) ((x) >> 16)
23 #define PCI_INTR_IRQ(x) ((x)&0xff)
24 #define PCI_INTR_PIN(x) (((x)&0xff00) >> 8)
25 #define PCI_DEV_CLASS(x) ((x) >> 8)
26 #define PCI_DEV_REV(x) (((x)&0xff))
27 #define PCI_BUS_NUM(x) (((x) >> 16) & 0xff)
28 #define PCI_SLOT_NUM(x) (((x) >> 11) & 0x1f)
29 #define PCI_FUNCT_NUM(x) (((x) >> 8) & 0x7)
31 #define PCI_BAR_MMIO(x) (!((x)&0x1))
32 #define PCI_BAR_CACHEABLE(x) ((x)&0x8)
33 #define PCI_BAR_TYPE(x) ((x)&0x6)
34 #define PCI_BAR_ADDR_MM(x) ((x) & ~0xf)
35 #define PCI_BAR_ADDR_IO(x) ((x) & ~0x3)
37 #define PCI_MSI_ADDR(msi_base) ((msi_base) + 4)
38 #define PCI_MSI_DATA(msi_base, offset) ((msi_base) + 8 + offset)
39 #define PCI_MSI_MASK(msi_base, offset) ((msi_base) + 0xc + offset)
41 #define MSI_CAP_64BIT 0x80
42 #define MSI_CAP_MASK 0x100
43 #define MSI_CAP_ENABLE 0x1
45 #define PCI_RCMD_DISABLE_INTR (1 << 10)
46 #define PCI_RCMD_FAST_B2B (1 << 9)
47 #define PCI_RCMD_BUS_MASTER (1 << 2)
48 #define PCI_RCMD_MM_ACCESS (1 << 1)
49 #define PCI_RCMD_IO_ACCESS 1
51 #define PCI_ADDRESS(bus, dev, funct) \
52 (((bus)&0xff) << 16) | (((dev)&0xff) << 11) | (((funct)&0xff) << 8) | \
55 typedef unsigned int pci_reg_t;
57 // PCI device header format
58 // Ref: "PCI Local Bus Specification, Rev.3, Section 6.1"
60 #define BAR_TYPE_MMIO 0x1
61 #define BAR_TYPE_CACHABLE 0x2
62 #define PCI_DRV_NAME_LEN 32
75 struct llist_header dev_chain;
83 struct pci_driver* type;
86 struct pci_base_addr bar[6];
89 typedef void* (*pci_drv_init)(struct pci_device*);
93 struct llist_header drivers;
96 pci_drv_init create_driver;
97 char name[PCI_DRV_NAME_LEN];
100 // PCI Configuration Space (C-Space) r/w:
101 // Refer to "PCI Local Bus Specification, Rev.3, Section 3.2.2.3.2"
103 static inline pci_reg_t
104 pci_read_cspace(u32_t base, int offset)
106 io_outl(PCI_CONFIG_ADDR, base | (offset & ~0x3));
107 return io_inl(PCI_CONFIG_DATA);
111 pci_write_cspace(u32_t base, int offset, pci_reg_t data)
113 io_outl(PCI_CONFIG_ADDR, base | (offset & ~0x3));
114 io_outl(PCI_CONFIG_DATA, data);
118 * @brief 初始化PCI。这主要是通过扫描PCI总线进行拓扑重建。注意,该
119 * 初始化不包括针对每个设备的初始化,因为那是设备驱动的事情。
126 * @brief 根据类型代码(Class Code)去在拓扑中寻找一个设备
127 * 类型代码请参阅: PCI LB Spec. Appendix D.
129 * @return struct pci_device*
131 struct pci_device* pci_get_device_by_class(u32_t class);
134 * @brief 根据设备商ID和设备ID,在拓扑中寻找一个设备
138 * @return struct pci_device*
141 pci_get_device_by_id(u16_t vendorId, u16_t deviceId);
144 * @brief 初始化PCI设备的基地址寄存器。返回由该基地址代表的,
145 * 设备所使用的MMIO或I/O地址空间的,大小。
146 * 参阅:PCI LB Spec. (Rev 3) Section 6.2.5.1, Implementation Note.
148 * @param dev The PCI device
149 * @param bar_out Value in BAR
150 * @param bar_num The index of BAR (starting from 1)
154 pci_bar_sizing(struct pci_device* dev, u32_t* bar_out, u32_t bar_num);
157 * @brief 配置并启用设备MSI支持。
158 * 参阅:PCI LB Spec. (Rev 3) Section 6.8 & 6.8.1
159 * 以及:Intel Manual, Vol 3, Section 10.11
161 * @param device PCI device
162 * @param vector interrupt vector.
165 pci_setup_msi(struct pci_device* device, int vector);
168 pci_add_driver(const char* name,
175 pci_bind_driver(struct pci_device* pci_dev);
178 pci_probe_bar_info(struct pci_device* device);
181 pci_probe_msi_info(struct pci_device* device);
183 #endif /* __LUNAIX_PCI_H */