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ladybird/Kernel/PCI/Access.h

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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/*
Meta: Claim copyright on `PCI` files
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
Kernel: Create support for PCI ECAM 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.
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#pragma once
#include <AK/String.h>
Kernel: Keep records of PCI::Address & PCI::ID pairs for enumeration
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#include <AK/Vector.h>
Kernel: Create support for PCI ECAM 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.
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#include <Kernel/PCI/Definitions.h>
Kernel: Move all code into the Kernel namespace
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namespace Kernel {
Kernel: Create support for PCI ECAM 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.
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class PCI::Access {
public:
Kernel: Keep records of PCI::Address & PCI::ID pairs for enumeration
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void enumerate(Function<void(Address, ID)>&) const;
Kernel: Create support for PCI ECAM 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.
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Kernel: Fix PCI bridge enumeration The enumeration code is already enumerating all buses, recursively enumerating bridges (which are buses) makes devices on bridges being enumerated multiple times. Also, the PCI code was incorrectly mixing up terminology; let's settle down on bus, device and function because ever since PCIe came along "slots" isn't really a thing anymore.
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void enumerate_bus(int type, u8 bus, Function<void(Address, ID)>&, bool recursive);
void enumerate_functions(int type, u8 bus, u8 device, u8 function, Function<void(Address, ID)>& callback, bool recursive);
void enumerate_device(int type, u8 bus, u8 device, Function<void(Address, ID)>& callback, bool recursive);
Kernel: Create support for PCI ECAM 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.
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static Access& the();
static bool is_initialized();
Kernel: Fix up various PCI-related function signatures - Make things const when they don't need to be non-const. - Don't return AK::String when it's always a string literal anyway. - Remove excessive get_ prefixes per coding style.
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virtual uint32_t segment_count() const = 0;
virtual uint8_t segment_start_bus(u32 segment) const = 0;
virtual uint8_t segment_end_bus(u32 segment) const = 0;
virtual const char* access_type() const = 0;
Kernel: Create support for PCI ECAM 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.
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Kernel: Allow to reboot in ACPI via PCI or MMIO access Also, we determine if ACPI reboot is supported by checking the FADT flags' field.
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virtual void write8_field(Address address, u32 field, u8 value) = 0;
virtual void write16_field(Address address, u32 field, u16 value) = 0;
virtual void write32_field(Address address, u32 field, u32 value) = 0;
Kernel: Create support for PCI ECAM 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.
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virtual u8 read8_field(Address address, u32 field) = 0;
virtual u16 read16_field(Address address, u32 field) = 0;
virtual u32 read32_field(Address address, u32 field) = 0;
Kernel: Remove an unnecessary layer of indirection in the PCI code The PCI access layer was composed of a bunch of virtual functions that did nothing but call other virtual functions. The first layer was never overridden so there was no need for them to be virtual. This patch removes the indirection and moves logic from PCI::Access down into the various PCI::get_foo() helpers that were the sole users.
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Kernel: Add a method to retrieve the Physical ID for a PCI address
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PhysicalID get_physical_id(Address address) const;
Kernel: Remove an unnecessary layer of indirection in the PCI code The PCI access layer was composed of a bunch of virtual functions that did nothing but call other virtual functions. The first layer was never overridden so there was no need for them to be virtual. This patch removes the indirection and moves logic from PCI::Access down into the various PCI::get_foo() helpers that were the sole users.
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protected:
Kernel: Keep records of PCI::Address & PCI::ID pairs for enumeration
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virtual void enumerate_hardware(Function<void(Address, ID)>) = 0;
Kernel: Map PCI devices only once during boot Instead of mapping a 4KB region to access device configuration space each time we call one of the PCI helpers, just map them once during the boot process. Then, if we request to access one of those devices, we can ask the PCI subsystem to give us the virtual address where the device's configuration space is mapped.
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u8 early_read8_field(Address address, u32 field);
u16 early_read16_field(Address address, u32 field);
u32 early_read32_field(Address address, u32 field);
u16 early_read_type(Address address);
Kernel: Remove an unnecessary layer of indirection in the PCI code The PCI access layer was composed of a bunch of virtual functions that did nothing but call other virtual functions. The first layer was never overridden so there was no need for them to be virtual. This patch removes the indirection and moves logic from PCI::Access down into the various PCI::get_foo() helpers that were the sole users.
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Access();
Everything: Add `-Wnon-virtual-dtor` flag This flag warns on classes which have `virtual` functions but do not have a `virtual` destructor. This patch adds both the flag and missing destructors. The access level of the destructors was determined by a two rules of thumb: 1. A destructor should have a similar or lower access level to that of a constructor. 2. Having a `private` destructor implicitly deletes the default constructor, which is probably undesirable for "interface" types (classes with only virtual functions and no data). In short, most of the added destructors are `protected`, unless the compiler complained about access.
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virtual ~Access() = default;
Kernel: Keep records of PCI::Address & PCI::ID pairs for enumeration
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Vector<PhysicalID> m_physical_ids;
Kernel: Create support for PCI ECAM 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.
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};
Kernel: Move all code into the Kernel namespace
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}
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