jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Pankaj R <pankydev8@gmail.com>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <Kernel/Arch/Delay.h>
8#include <Kernel/Devices/BlockDevice.h>
9#include <Kernel/Storage/NVMe/NVMeDefinitions.h>
10#include <Kernel/Storage/NVMe/NVMePollQueue.h>
11
12namespace Kernel {
13UNMAP_AFTER_INIT NVMePollQueue::NVMePollQueue(NonnullOwnPtr<Memory::Region> rw_dma_region, Memory::PhysicalPage const& rw_dma_page, u16 qid, u32 q_depth, OwnPtr<Memory::Region> cq_dma_region, Vector<NonnullRefPtr<Memory::PhysicalPage>> cq_dma_page, OwnPtr<Memory::Region> sq_dma_region, Vector<NonnullRefPtr<Memory::PhysicalPage>> sq_dma_page, Memory::TypedMapping<DoorbellRegister volatile> db_regs)
14 : NVMeQueue(move(rw_dma_region), rw_dma_page, qid, q_depth, move(cq_dma_region), cq_dma_page, move(sq_dma_region), sq_dma_page, move(db_regs))
15{
16}
17
18void NVMePollQueue::submit_sqe(NVMeSubmission& sub)
19{
20 NVMeQueue::submit_sqe(sub);
21 SpinlockLocker lock_cq(m_cq_lock);
22 while (!process_cq()) {
23 microseconds_delay(1);
24 }
25}
26
27void NVMePollQueue::complete_current_request(u16 status)
28{
29 auto current_request = m_current_request;
30 m_current_request.clear();
31 if (status) {
32 current_request->complete(AsyncBlockDeviceRequest::Failure);
33 return;
34 }
35 if (current_request->request_type() == AsyncBlockDeviceRequest::RequestType::Read) {
36 if (auto result = current_request->write_to_buffer(current_request->buffer(), m_rw_dma_region->vaddr().as_ptr(), current_request->buffer_size()); result.is_error()) {
37 current_request->complete(AsyncDeviceRequest::MemoryFault);
38 return;
39 }
40 }
41 current_request->complete(AsyncDeviceRequest::Success);
42 return;
43}
44}