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0b1fa97b30
Instead of polling if the device ended the operation, we can just use interrupts for signalling about end of IO operation. In similar way, we use interrupts during device detection. Also, we use the new Work Queue mechanism introduced by @tomuta to allow better performance and stability :)
80 lines
3.1 KiB
C++
80 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <AK/Types.h>
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#include <Kernel/Storage/AHCI.h>
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#include <Kernel/Storage/StorageController.h>
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#include <Kernel/Storage/StorageDevice.h>
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namespace Kernel {
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class AsyncBlockDeviceRequest;
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class AHCIPortHandler;
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class AHCIPort;
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class AHCIController final : public StorageController
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, public PCI::DeviceController {
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friend class AHCIPortHandler;
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friend class AHCIPort;
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AK_MAKE_ETERNAL
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public:
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public:
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UNMAP_AFTER_INIT static NonnullRefPtr<AHCIController> initialize(PCI::Address address);
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virtual ~AHCIController() override;
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virtual Type type() const override { return Type::AHCI; }
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virtual RefPtr<StorageDevice> device(u32 index) const override;
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virtual bool reset() override;
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virtual bool shutdown() override;
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virtual size_t devices_count() const override;
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virtual void start_request(const StorageDevice&, AsyncBlockDeviceRequest&) override;
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virtual void complete_current_request(AsyncDeviceRequest::RequestResult) override;
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const AHCI::HBADefinedCapabilities& hba_capabilities() const { return m_capabilities; };
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private:
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void disable_global_interrupts() const;
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void enable_global_interrupts() const;
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UNMAP_AFTER_INIT explicit AHCIController(PCI::Address address);
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UNMAP_AFTER_INIT void initialize();
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AHCI::HBADefinedCapabilities capabilities() const;
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RefPtr<StorageDevice> device_by_port(u32 index) const;
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volatile AHCI::PortRegisters& port(size_t port_number) const;
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NonnullOwnPtr<Region> hba_region() const;
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volatile AHCI::HBA& hba() const;
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NonnullOwnPtr<Region> m_hba_region;
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AHCI::HBADefinedCapabilities m_capabilities;
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NonnullRefPtrVector<AHCIPortHandler> m_handlers;
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};
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}
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