PCI

include/drivers/pci.h

struct pci_device

struct pci_device {
    uint8_t   bus;
    uint8_t   device;
    uint8_t   function;
    uint16_t  vendor_id;
    uint16_t  device_id;
    uint8_t   class_code;
    uint8_t   subclass;
    uint8_t   prog_if;
    uint8_t   revision;
};

struct pci_driver

struct pci_driver {
    char      *name;
    uint8_t   class_code;
    uint8_t   subclass;
    uint8_t   prog_if;
    uint16_t  vendor_id;
    void      (*initialize)(uint8_t, uint8_t, uint8_t, struct pci_device *);
};

union pci_command_reg

union pci_command_reg {
    uint16_t  value;
    struct {
        uint16_t  io_space;
        uint16_t  memory_space;
        uint16_t  bus_master;
        uint16_t  special_cycles;
        uint16_t  mem_write_inv;
        uint16_t  vga_snoop;
        uint16_t  parity_error;
        uint16_t  reserved0;
        uint16_t  serr_enable;
        uint16_t  fast_back;
        uint16_t  interrupt_disable;
        uint16_t  reserved1;
    };
};

struct pci_msix_table_entry

struct pci_msix_table_entry {
    uint32_t  msg_addr_low;
    uint32_t  msg_addr_high;
    uint32_t  msg_data;
    uint32_t  vector_ctrl;
};

struct pci_msix_cap

struct pci_msix_cap {
    uint8_t   cap_id;
    uint8_t   next_ptr;
    uint16_t  msg_ctl;
    uint32_t  table_offset_bir;
    uint32_t  pba_offset_bir;
};

pci_read_config16

uint16_t pci_read_config16(uint8_t bus, uint8_t device, uint8_t function, uint8_t offset);

pci_read_config8

uint8_t pci_read_config8(uint8_t bus, uint8_t device, uint8_t function, uint8_t offset);

pci_write_config16

void pci_write_config16(uint8_t bus, uint8_t device, uint8_t function, uint8_t offset, uint16_t value);

pci_config_address

uint32_t pci_config_address(uint8_t bus, uint8_t slot, uint8_t func, uint8_t offset);

pci_read

uint32_t pci_read(uint8_t bus, uint8_t slot, uint8_t func, uint8_t offset);

pci_read_word

uint16_t pci_read_word(uint8_t bus, uint8_t slot, uint8_t func, uint8_t offset);

pci_read_byte

uint8_t pci_read_byte(uint8_t bus, uint8_t slot, uint8_t func, uint8_t offset);

pci_write

void pci_write(uint8_t bus, uint8_t slot, uint8_t func, uint8_t offset, uint32_t value);

pci_write_word

void pci_write_word(uint8_t bus, uint8_t slot, uint8_t func, uint8_t offset, uint16_t value);

pci_write_byte

void pci_write_byte(uint8_t bus, uint8_t slot, uint8_t func, uint8_t offset, uint8_t value);

Defines

PCI_CLASS_MASS_STORAGE

#define PCI_CLASS_MASS_STORAGE 0x01

PCI_SUBCLASS_NVM

#define PCI_SUBCLASS_NVM 0x08

PCI_PROGIF_NVME

#define PCI_PROGIF_NVME 0x02

PCI_DEV_REGISTER(n, cc, sc, pi, vi, init)

#define PCI_DEV_REGISTER(n, cc, sc, pi, vi, init)                              \ static struct pci_driver pci_device_##n __attribute__((                    \ section(".kernel_pci_devices"), used)) = {.name = #n,                  \ .class_code = cc,            \ .subclass = sc,              \ .prog_if = pi,               \ .vendor_id = vi,             \ .initialize = init};

PCI_BAR0

#define PCI_BAR0 0x10

PCI_BAR1

#define PCI_BAR1 0x14

PCI_BAR2

#define PCI_BAR2 0x18

PCI_BAR3

#define PCI_BAR3 0x1C

PCI_BAR4

#define PCI_BAR4 0x20

PCI_BAR5

#define PCI_BAR5 0x24

PCI_CAP_PTR

#define PCI_CAP_PTR 0x34

PCI_CAP_ID_MSIX

#define PCI_CAP_ID_MSIX 0x11

PCI_CONFIG_ADDRESS

#define PCI_CONFIG_ADDRESS 0xCF8

PCI_CONFIG_DATA

#define PCI_CONFIG_DATA 0xCFC

PCI_INTERRUPT_LINE

#define PCI_INTERRUPT_LINE 0x3C

PCI_PROG_IF

#define PCI_PROG_IF 0x09

pci_log(log_level, fmt, ...)

#define pci_log(log_level, fmt, ...)                                           \ log(LOG_SITE(pci), LOG_HANDLE(pci), log_level, fmt, ##__VA_ARGS__)

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