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Kernel: Create support for PCI ECAM

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The new PCI subsystem is initialized during runtime.
PCI::Initializer is supposed to be called during early boot, to
perform a few tests, and initialize the proper configuration space
access mechanism. Kernel boot parameters can be specified by a user to
determine what tests will occur, to aid debugging on problematic
machines.
After that, PCI::Initializer should be dismissed.

PCI::IOAccess is a class that is derived from PCI::Access
class and implements PCI configuration space access mechanism via x86
IO ports.
PCI::MMIOAccess is a class that is derived from PCI::Access
and implements PCI configurtaion space access mechanism via memory
access.

The new PCI subsystem also supports determination of IO/MMIO space
needed by a device by checking a given BAR.
In addition, Every device or component that use the PCI subsystem has
changed to match the last changes.
This commit is contained in:
Liav A 2019-12-31 13:04:30 +02:00 • committed by Andreas Kling
parent d85874be4b
commit e5ffa960d7
20 changed files with 878 additions and 16 deletions
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3
Kernel/Net/E1000NetworkAdapter.cpp
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@ -1,6 +1,5 @@
#include <Kernel/IO.h>
#include <Kernel/Net/E1000NetworkAdapter.h>
#include <Kernel/PCI.h>
#include <Kernel/Thread.h>
#define REG_CTRL 0x0000
@ -119,6 +118,7 @@ E1000NetworkAdapter::E1000NetworkAdapter(PCI::Address pci_address, u8 irq)
enable_bus_mastering(m_pci_address);
m_mmio_base = PhysicalAddress(PCI::get_BAR0(m_pci_address));
u32 mmio_base_size = PCI::get_BAR_Space_Size(pci_address, 0);
MM.map_for_kernel(VirtualAddress(m_mmio_base.get()), m_mmio_base);
MM.map_for_kernel(VirtualAddress(m_mmio_base.offset(4096).get()), m_mmio_base.offset(4096));
MM.map_for_kernel(VirtualAddress(m_mmio_base.offset(8192).get()), m_mmio_base.offset(8192));
@ -129,6 +129,7 @@ E1000NetworkAdapter::E1000NetworkAdapter(PCI::Address pci_address, u8 irq)
m_interrupt_line = PCI::get_interrupt_line(m_pci_address);
kprintf("E1000: IO port base: %w\n", m_io_base);
kprintf("E1000: MMIO base: P%x\n", m_mmio_base);
kprintf("E1000: MMIO base size: %u bytes\n", mmio_base_size);
kprintf("E1000: Interrupt line: %u\n", m_interrupt_line);
detect_eeprom();
kprintf("E1000: Has EEPROM? %u\n", m_has_eeprom);