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Kernel/NVMe: Add initial NVMe driver support

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Add a basic NVMe driver support to serenity
based on NVMe spec 1.4.

The driver can support multiple NVMe drives (subsystems).
But in a NVMe drive, the driver can support one controller
with multiple namespaces.

Each core will get a separate NVMe Queue.
As the system lacks MSI support, PIN based interrupts are
used for IO.

Tested the NVMe support by replacing IDE driver
with the NVMe driver :^)
This commit is contained in:
Pankaj Raghav 2021-12-16 20:37:54 +05:30 • committed by Andreas Kling
parent 602b35aa62
commit e99fafb683
13 changed files with 946 additions and 0 deletions
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36
Kernel/Storage/NVMe/NVMeNameSpace.h Normal file
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/*
* Copyright (c) 2021, Pankaj R <pankydev8@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "AK/kmalloc.h"
#include <AK/NonnullRefPtr.h>
#include <AK/NonnullRefPtrVector.h>
#include <AK/OwnPtr.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/Types.h>
#include <Kernel/Locking/Spinlock.h>
#include <Kernel/Storage/NVMe/NVMeDefinitions.h>
#include <Kernel/Storage/NVMe/NVMeQueue.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
class NVMeNameSpace : public StorageDevice {
public:
static ErrorOr<NonnullRefPtr<NVMeNameSpace>> try_create(NonnullRefPtrVector<NVMeQueue> queues, u8 controller_id, u16 nsid, size_t storage_size, size_t lba_size);
explicit NVMeNameSpace(NonnullRefPtrVector<NVMeQueue> queues, size_t storage_size, size_t lba_size, size_t major_number, size_t minor_number, u16 nsid, NonnullOwnPtr<KString> early_device_name);
CommandSet command_set() const override { return CommandSet::NVMe; };
void start_request(AsyncBlockDeviceRequest& request) override;
private:
u16 m_nsid;
NonnullRefPtrVector<NVMeQueue> m_queues;
};
}