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MdeModulePkg NvmExpressDxe: Fix invalid queue size when creating IO queues 

The Maximum Queue Entries Supported (MQES) field in the CAP (Controller
Capabilities) register for a NVMe controller restrict the maximum
individual queue size that the controller supports.

The origin code does not check this value and always uses a hardcode value
when creating I/O submission/completion queues for asynchronous
transmission. The hardcode value might be larger than the MQES field, this
will lead to an 'Invalid Queue Size' error when creating I/O
submission/completion queues.

The patch will add checks to make sure proper queue size is passed when
creating I/O submission/completion queues.

Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Feng Tian <feng.tian@Intel.com>
This commit is contained in:
Hao Wu 2016-06-01 16:32:03 +08:00
parent 6535266574
commit 05bf4747dd
1 changed files with 24 additions and 2 deletions
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26
MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressHci.c
View File

@ -683,6 +683,7 @@ NvmeCreateIoCompletionQueue (
EFI_STATUS Status;
NVME_ADMIN_CRIOCQ CrIoCq;
UINT32 Index;
UINT16 QueueSize;
Status = EFI_SUCCESS;
@ -701,8 +702,18 @@ NvmeCreateIoCompletionQueue (
CommandPacket.CommandTimeout = NVME_GENERIC_TIMEOUT;
CommandPacket.QueueType = NVME_ADMIN_QUEUE;
if (Index == 1) {
QueueSize = NVME_CCQ_SIZE;
} else {
if (Private->Cap.Mqes > NVME_ASYNC_CCQ_SIZE) {
QueueSize = NVME_ASYNC_CCQ_SIZE;
} else {
QueueSize = Private->Cap.Mqes;
}
}
CrIoCq.Qid = Index;
CrIoCq.Qsize = (Index == 1) ? NVME_CCQ_SIZE : NVME_ASYNC_CCQ_SIZE;
CrIoCq.Qsize = QueueSize;
CrIoCq.Pc = 1;
CopyMem (&CommandPacket.NvmeCmd->Cdw10, &CrIoCq, sizeof (NVME_ADMIN_CRIOCQ));
CommandPacket.NvmeCmd->Flags = CDW10_VALID | CDW11_VALID;
@ -741,6 +752,7 @@ NvmeCreateIoSubmissionQueue (
EFI_STATUS Status;
NVME_ADMIN_CRIOSQ CrIoSq;
UINT32 Index;
UINT16 QueueSize;
Status = EFI_SUCCESS;
@ -759,8 +771,18 @@ NvmeCreateIoSubmissionQueue (
CommandPacket.CommandTimeout = NVME_GENERIC_TIMEOUT;
CommandPacket.QueueType = NVME_ADMIN_QUEUE;
if (Index == 1) {
QueueSize = NVME_CSQ_SIZE;
} else {
if (Private->Cap.Mqes > NVME_ASYNC_CSQ_SIZE) {
QueueSize = NVME_ASYNC_CSQ_SIZE;
} else {
QueueSize = Private->Cap.Mqes;
}
}
CrIoSq.Qid = Index;
CrIoSq.Qsize = (Index == 1) ? NVME_CSQ_SIZE : NVME_ASYNC_CSQ_SIZE;
CrIoSq.Qsize = QueueSize;
CrIoSq.Pc = 1;
CrIoSq.Cqid = Index;
CrIoSq.Qprio = 0;