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Started fleshing out the storage API

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Nigel Barink
2023-02-21 14:36:20 +01:00
parent 81f7351fe6
commit ef2bba5c1c
49 changed files with 661 additions and 475 deletions
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164
kernel/pci/pci.cpp Normal file
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#include "pci.h"
void PCI::Scan(){
int devicesFound = 0;
printf("Start finding devices, Found: %d devices");
// loop through all possible busses, devices and their functions;
for( int bus = 0 ; bus < 256 ; bus++)
{
for(int device = 0; device < 32 ; device ++)
{
int function = 0;
uint64_t DeviceIdentify = PCI::ConfigReadWord(bus, device, function,0x0);
uint32_t DeviceID = GetDevice(bus, device, function) >> 16;
if( DeviceID != 0xFFFF){
PCIBusAddress busAddress =
PCIBusAddress{bus, device, function };
PrintPCIDevice(busAddress);
// iterate over the functions if it is a multi function device!
if( PCI::IsMultiFunctionDevice(busAddress) ){
printf("Multi function device! \n");
printf("Check remaining Functions\n");
for ( function = 1 ; function < 8; function++)
{
uint32_t DeviceID = GetDevice(bus, device, function) >> 16;
if( DeviceID != 0xFFFF){
PCIBusAddress busAddress2 = PCIBusAddress{bus, device, function};
PrintPCIDevice(busAddress2);
devicesFound++;
}
}
}
devicesFound++;
}
}
}
printf("Found %d PCI devices!\n", devicesFound);
}
const char* PCI::getClassName (uint8_t ClassCode){
bool isKnown = (ClassCode < PCI::KnownClassCodes);
return isKnown ? PCI::ClassCodeNames[ClassCode].name : "Unknown ClassCode";
}
const char* PCI::getVendor( uint32_t VendorID){
switch (VendorID)
{
case 0x8086:
return "Intel Corporation";
break;
case 0x10DE:
return "NVIDIA Corporation";
break;
case 0x1022:
return "Advanced Micro Devices, Inc.[AMD]";
break;
case 0x1002:
return "Advanced Micor Devices, Inc.[AMD/ATI]";
break;
case 0xbeef:
return "VirtualBox Graphics Adapter";
break;
case 0xcafe:
return "VirtualBox Guest Service";
break;
default:
return "Vendor Unkown";
break;
}
}
uint64_t PCI::GetDevice (int bus, int device, int function ){
return PCI::ConfigReadWord(bus, device, function,0x0);
}
bool PCI::IsMultiFunctionDevice(PCIBusAddress& PCIDeviceAddress)
{
uint32_t header_information = ConfigReadWord(PCIDeviceAddress, 0xC);
return (((header_information>>16)
& 0x80)
>> 7 );
}
uint16_t PCI::GetClassCodes( PCIBusAddress& PCIDeviceAddress ){
return (uint16_t)(ConfigReadWord(PCIDeviceAddress, 0x8) >> 16);
}
uint8_t PCI::GetHeaderType( PCIBusAddress& PCIDeviceAddress ){
uint32_t header_information = ConfigReadWord(PCIDeviceAddress , 0xC);
return (uint8_t) (
((header_information >> 16) //Get higher half
& 0x00FF) // Select the last two bytes
& 0x7F ); // Mask bit 7 as it indicates if the device is a mulit function device!
}
uint32_t PCI::ConfigReadWord (uint8_t bus, uint8_t device, uint8_t func, uint8_t offset){
uint32_t address;
address = (uint32_t) (
((uint32_t) 1 << PCI_ENABLE_ADDR_SHIFT) |
((uint32_t)bus << PCI_BUS_ADDR_SHIFT) |
((uint32_t)device << PCI_DEVICE_ADDR_SHIFT) |
((uint32_t)func << PCI_FUNCTION_ADDR_SHIFT) |
offset );
outl(CONFIG_ADDRESS, address);
return inl(CONFIG_DATA);
}
uint8_t PCI::GetProgIF (PCIBusAddress& PCIDeviceAddress){
uint32_t data = ConfigReadWord(PCIDeviceAddress, 0x8);
return ((data >> 8) & 0xFF);
}
uint32_t PCI::ConfigReadWord ( PCIBusAddress& PCIDeviceAddress , uint8_t offset){
outl(CONFIG_ADDRESS , PCIDeviceAddress.getAddress() | offset );
return inl(CONFIG_DATA);
}
uint32_t PCI::ReadBAR ( PCIBusAddress& PCIDeviceAddress, int bar_number){
int offsetToBar = 0x10 + (bar_number* 0x4);
return ConfigReadWord(PCIDeviceAddress, offsetToBar);
}
void PCI::PrintPCIDevice (PCIBusAddress& PCIDeviceAddress)
{
uint32_t DeviceID = (PCI::GetDevice(PCIDeviceAddress.bus, PCIDeviceAddress.device, PCIDeviceAddress.function) >> 16);
uint32_t VendorID = PCI::GetDevice(PCIDeviceAddress.bus, PCIDeviceAddress.device, PCIDeviceAddress.function) & 0xFFFF;
printf("Device found!\n");
printf("Bus: %d, Device: %d, function: %d \n", PCIDeviceAddress.bus, PCIDeviceAddress.device, PCIDeviceAddress.function);
printf("DeviceID: 0x%x, Vendor: %s\n",
DeviceID
, PCI::getVendor(VendorID) );
uint8_t header_type = PCI::GetHeaderType(PCIDeviceAddress);
printf( "Header type: 0x%x\n", header_type);
uint16_t deviceClasses = PCI::GetClassCodes(PCIDeviceAddress);
printf("class: %s, subClass: %d\n\n", PCI::getClassName((deviceClasses >> 8)), deviceClasses & 0xFF);
}

61
kernel/pci/pci.h Normal file
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#pragma once
#include <stdint.h>
#include "../io/io.h"
#include "../terminal/kterm.h"
#include "pciDevice.h"
// Configuration Space Access Mechanism #1
#define CONFIG_ADDRESS 0xCF8 // Configuration adress that is to be accessed
#define CONFIG_DATA 0xCFC // Will do the actual configuration operation
#define PCI_BUS_ADDR_SHIFT 16
#define PCI_DEVICE_ADDR_SHIFT 11
#define PCI_FUNCTION_ADDR_SHIFT 8
#define PCI_ENABLE_ADDR_SHIFT 31
class PCI {
public:
static void Scan();
static uint32_t ConfigReadWord ( PCIBusAddress& PCIDeviceAddress , uint8_t offset);
static uint8_t GetProgIF (PCIBusAddress& PCIDeviceAddress);
static uint32_t ReadBAR ( PCIBusAddress& PCIDeviceAddress, int bar_number);
static uint32_t ConfigReadWord (uint8_t bus, uint8_t device, uint8_t func, uint8_t offset);
static uint8_t GetHeaderType( PCIBusAddress& PCIDeviceAddress );
static uint16_t GetClassCodes( PCIBusAddress& PCIDeviceAddress );
static bool IsMultiFunctionDevice(PCIBusAddress& PCIDeviceAddress);
static uint64_t GetDevice (int bus, int device, int function );
static const char* getClassName (uint8_t ClassCode);
static const char* getVendor( uint32_t VendorID);
static void PrintPCIDevice(PCIBusAddress& PCIDevice);
private:
struct ClassCode {
const char* name;
uint8_t code;
};
static constexpr ClassCode ClassCodeNames []= {
{"Unclassified", 0x0},
{"MassStorage Controller", 0x1},
{"Network Controller", 0x2},
{"Display Controller", 0x3},
{"Multimedia Controller", 0x4},
{"Memory Controller", 0x5},
{"Bridge", 0x6},
{"Simple Communication Controller", 0x7},
{"Base System Peripheral", 0x8},
{"Input Device Controller", 0x9},
{"Docking Station", 0xA},
{"Processor", 0xB},
{"Serial Bus Controller", 0xC},
{ "Wireless Controller", 0xD},
{"Intelligent Controller", 0xE},
{"Satellite Communication Controller", 0xF},
{"Encryption Controller", 0x10},
{"Signal Processing Controller", 0x11},
{ "Processing Accelerator", 0x12},
{ "Non-Essential Instrumentation", 0x13}
};
static const uint8_t KnownClassCodes = sizeof(ClassCodeNames) / sizeof(ClassCode);
};

7
kernel/pci/pciDevice.cpp Normal file
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#include "pciDevice.h"
// NOTE: we would really like to return a pointer
// to the newly created PCIBusAddress struct;
PCIBusAddress const PCIDevice::PCIAddress(){
return PCIBusAddress{bus ,device, function};
}

54
kernel/pci/pciDevice.h Normal file
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#pragma once
#include <stdint.h>
/*
* PCI devices API
*/
struct PCIBusAddress{
int bus ;
int device ;
int function;
uint32_t getAddress( ){
return ((uint32_t) 1 << 31) |
((uint32_t) bus << 16) |
((uint32_t) device << 11)|
((uint32_t) function << 8) |
0x0000;
};
};
class PCIDevice {
public :
PCIDevice (PCIBusAddress* , int );
~PCIDevice();
PCIBusAddress const PCIAddress();
inline const char* getDeviceString(){
return "Not implemented"; //GetClassCodeName(deviceclass);
}
inline const char* getVendorString(){
return "Not implemented"; // getVendor(VendorID);
}
inline void setVendorID (uint16_t id) {
this->VendorID = id;
}
private:
int bus;
int device;
int function;
uint16_t VendorID;
uint16_t DeviceID;
uint8_t deviceclass;
uint8_t devicesubclass;
int headerType;
};