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Kernel: Merge NVME Queue complete_current_request implementations

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Most of the actual logic is identical, with the only real difference
being that one wraps it with an async work item.
Merge the implementations to reduce duplications (which will also
require the fixes in the next commits to only be done once).
This commit is contained in:
Idan Horowitz 2024-02-09 17:06:02 +02:00 • committed by Andreas Kling
parent 4fbc701721
commit a957907f4b
5 changed files with 40 additions and 72 deletions
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37
Kernel/Devices/Storage/NVMe/NVMeQueue.cpp
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@ -104,6 +104,43 @@ void NVMeQueue::submit_sqe(NVMeSubmission& sub)
update_sq_doorbell();
}
void NVMeQueue::complete_current_request(u16 cmdid, u16 status)
{
SpinlockLocker lock(m_request_lock);
auto& request_pdu = m_requests.get(cmdid).release_value();
auto current_request = request_pdu.request;
AsyncDeviceRequest::RequestResult req_result = AsyncDeviceRequest::Success;
ScopeGuard guard = [req_result, status, &request_pdu, &lock] {
// FIXME: We should unlock at the end of this function to make sure no new requests is inserted
// before we complete the request and calling end_io_handler but that results in a deadlock
// For now this is avoided by asserting the `used` field while inserting.
lock.unlock();
if (request_pdu.request)
request_pdu.request->complete(req_result);
if (request_pdu.end_io_handler)
request_pdu.end_io_handler(status);
request_pdu.clear();
};
// There can be submission without any request associated with it such as with
// admin queue commands during init. If there is no request, we are done
if (!current_request)
return;
if (status) {
req_result = AsyncBlockDeviceRequest::Failure;
return;
}
if (current_request->request_type() == AsyncBlockDeviceRequest::RequestType::Read) {
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()) {
req_result = AsyncBlockDeviceRequest::MemoryFault;
return;
}
}
}
u16 NVMeQueue::submit_sync_sqe(NVMeSubmission& sub)
{
// For now let's use sq tail as a unique command id.