X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/5486af56a526398455ca6fa212e7b43c72daec98..5a8d4ebecaa50af25bd53c3b2236dca77a14eb81:/lunaix-os/includes/hal/pci.h

diff --git a/lunaix-os/includes/hal/pci.h b/lunaix-os/includes/hal/pci.h
index 3e421ee..b31352b 100644
--- a/lunaix-os/includes/hal/pci.h
+++ b/lunaix-os/includes/hal/pci.h
@@ -13,13 +13,38 @@
 
 #define PCI_VENDOR_INVLD 0xffff
 
-#define PCI_REG_VENDER 0x0
-#define PCI_REG_DEV 0x1
-#define PCI_REG_HDRTYPE 0x7
-
-#define PCI_ADDRESS(bus, dev, funct, reg)                                      \
+#define PCI_REG_VENDOR_DEV 0
+#define PCI_REG_STATUS_CMD 0x4
+#define PCI_REG_BAR(num) (0x10 + (num - 1) * 4)
+
+#define PCI_DEV_VENDOR(x) ((x)&0xffff)
+#define PCI_DEV_DEVID(x) ((x) >> 16)
+#define PCI_INTR_IRQ(x) ((x)&0xff)
+#define PCI_INTR_PIN(x) (((x)&0xff00) >> 8)
+#define PCI_DEV_CLASS(x) ((x) >> 8)
+#define PCI_DEV_REV(x) (((x)&0xff))
+#define PCI_BUS_NUM(x) (((x) >> 16) & 0xff)
+#define PCI_SLOT_NUM(x) (((x) >> 11) & 0x1f)
+#define PCI_FUNCT_NUM(x) (((x) >> 8) & 0x7)
+
+#define PCI_BAR_MMIO(x) (!((x)&0x1))
+#define PCI_BAR_CACHEABLE(x) ((x)&0x8)
+#define PCI_BAR_TYPE(x) ((x)&0x6)
+#define PCI_BAR_ADDR_MM(x) ((x) & ~0xf)
+#define PCI_BAR_ADDR_IO(x) ((x) & ~0x3)
+
+#define PCI_MSI_ADDR(msi_base) ((msi_base) + 4)
+#define PCI_MSI_DATA(msi_base) ((msi_base) + 8)
+
+#define PCI_RCMD_DISABLE_INTR (1 << 10)
+#define PCI_RCMD_FAST_B2B (1 << 9)
+#define PCI_RCMD_BUS_MASTER (1 << 2)
+#define PCI_RCMD_MM_ACCESS (1 << 1)
+#define PCI_RCMD_IO_ACCESS 1
+
+#define PCI_ADDRESS(bus, dev, funct)                                           \
     (((bus)&0xff) << 16) | (((dev)&0xff) << 11) | (((funct)&0xff) << 8) |      \
-      (((reg)&0xff) << 2) | 0x80000000
+      0x80000000
 
 typedef unsigned int pci_reg_t;
 
@@ -29,45 +54,81 @@ typedef unsigned int pci_reg_t;
 struct pci_device
 {
     struct llist_header dev_chain;
-    uint16_t vendor;
-    uint16_t deviceId;
-    uint32_t class_code;
-    uint8_t bus;
-    uint8_t dev;
-    uint8_t function;
-    uint8_t type;
-    uint8_t intr_line;
-    uint8_t intr_pintype;
-    uint32_t bars[6];
+    uint32_t device_info;
+    uint32_t class_info;
+    uint32_t cspace_base;
+    uint32_t msi_loc;
+    uint16_t intr_info;
 };
 
 // PCI Configuration Space (C-Space) r/w:
 //      Refer to "PCI Local Bus Specification, Rev.3, Section 3.2.2.3.2"
 
 inline pci_reg_t
-pci_read_cspace(int bus, int dev, int funct, int reg)
+pci_read_cspace(uint32_t base, int offset)
 {
-    io_outl(PCI_CONFIG_ADDR, PCI_ADDRESS(bus, dev, funct, reg));
+    io_outl(PCI_CONFIG_ADDR, base | (offset & ~0x3));
     return io_inl(PCI_CONFIG_DATA);
 }
 
 inline void
-pci_write_cspace(int bus, int dev, int funct, int reg, pci_reg_t data)
+pci_write_cspace(uint32_t base, int offset, pci_reg_t data)
 {
-    io_outl(PCI_CONFIG_ADDR, PCI_ADDRESS(bus, dev, funct, reg));
+    io_outl(PCI_CONFIG_ADDR, base | (offset & ~0x3));
     io_outl(PCI_CONFIG_DATA, data);
 }
 
-void
-pci_probe();
-
+/**
+ * @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
+ * 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。
+ *
+ */
 void
 pci_init();
 
 void
 pci_print_device();
 
+/**
+ * @brief 根据类型代码（Class Code）去在拓扑中寻找一个设备
+ * 类型代码请参阅： PCI LB Spec. Appendix D.
+ *
+ * @return struct pci_device*
+ */
+struct pci_device* pci_get_device_by_class(uint32_t class);
+
+/**
+ * @brief 根据设备商ID和设备ID，在拓扑中寻找一个设备
+ *
+ * @param vendorId
+ * @param deviceId
+ * @return struct pci_device*
+ */
 struct pci_device*
-pci_get_device(uint16_t vendorId, uint16_t deviceId);
+pci_get_device_by_id(uint16_t vendorId, uint16_t deviceId);
+
+/**
+ * @brief 初始化PCI设备的基地址寄存器。返回由该基地址代表的，
+ * 设备所使用的MMIO或I/O地址空间的，大小。
+ * 参阅：PCI LB Spec. (Rev 3) Section 6.2.5.1, Implementation Note.
+ *
+ * @param dev The PCI device
+ * @param bar_out Value in BAR
+ * @param bar_num The index of BAR (starting from 1)
+ * @return size_t
+ */
+size_t
+pci_bar_sizing(struct pci_device* dev, uint32_t* bar_out, uint32_t bar_num);
+
+/**
+ * @brief 配置并启用设备MSI支持。
+ * 参阅：PCI LB Spec. (Rev 3) Section 6.8 & 6.8.1
+ * 以及：Intel Manual, Vol 3, Section 10.11
+ *
+ * @param device PCI device
+ * @param vector interrupt vector.
+ */
+void
+pci_setup_msi(struct pci_device* device, int vector);
 
 #endif /* __LUNAIX_PCI_H */