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MdeModulePkg/XhciDxe: Refine IsTransferRingTrb and IsAsyncIntTrb 

Current implementation of IsTransferRingTrb only checks whether
the TRB is in the RING of the URB.
The patch enhanced the logic to check that whether the TRB belongs
to the transaction of URB.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Ruiyu Ni 2017-06-28 16:55:12 +08:00
parent 1e6add9e47
commit 5a4b3388aa
1 changed files with 47 additions and 49 deletions
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96
MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
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@ -976,6 +976,49 @@ XhcFreeSched (
}
}
/**
Check if the Trb is a transaction of the URB.
@param Trb The TRB to be checked
@param Urb The URB to be checked.
@retval TRUE It is a transaction of the URB.
@retval FALSE It is not any transaction of the URB.
**/
BOOLEAN
IsTransferRingTrb (
IN USB_XHCI_INSTANCE *Xhc,
IN TRB_TEMPLATE *Trb,
IN URB *Urb
)
{
LINK_TRB *LinkTrb;
TRB_TEMPLATE *CheckedTrb;
UINTN Index;
EFI_PHYSICAL_ADDRESS PhyAddr;
CheckedTrb = Urb->TrbStart;
for (Index = 0; Index < Urb->TrbNum; Index++) {
if (Trb == CheckedTrb) {
return TRUE;
}
CheckedTrb++;
//
// If the checked TRB is the link TRB at the end of the transfer ring,
// recircle it to the head of the ring.
//
if (CheckedTrb->Type == TRB_TYPE_LINK) {
LinkTrb = (LINK_TRB *) CheckedTrb;
PhyAddr = (EFI_PHYSICAL_ADDRESS)(LinkTrb->PtrLo | LShiftU64 ((UINT64) LinkTrb->PtrHi, 32));
CheckedTrb = (TRB_TEMPLATE *)(UINTN) UsbHcGetHostAddrForPciAddr (Xhc->MemPool, (VOID *)(UINTN) PhyAddr, sizeof (TRB_TEMPLATE));
ASSERT (CheckedTrb == Urb->Ring->RingSeg0);
}
}
return FALSE;
}
/**
Check if the Trb is a transaction of the URBs in XHCI's asynchronous transfer list.
@ -996,65 +1039,20 @@ IsAsyncIntTrb (
{
LIST_ENTRY *Entry;
LIST_ENTRY *Next;
TRB_TEMPLATE *CheckedTrb;
URB *CheckedUrb;
UINTN Index;
EFI_LIST_FOR_EACH_SAFE (Entry, Next, &Xhc->AsyncIntTransfers) {
CheckedUrb = EFI_LIST_CONTAINER (Entry, URB, UrbList);
CheckedTrb = CheckedUrb->TrbStart;
for (Index = 0; Index < CheckedUrb->TrbNum; Index++) {
if (Trb == CheckedTrb) {
*Urb = CheckedUrb;
return TRUE;
}
CheckedTrb++;
//
// If the checked TRB is the link TRB at the end of the transfer ring,
// recircle it to the head of the ring.
//
if (CheckedTrb->Type == TRB_TYPE_LINK) {
CheckedTrb = (TRB_TEMPLATE*) CheckedUrb->Ring->RingSeg0;
}
}
}
return FALSE;
}
/**
Check if the Trb is a transaction of the URB.
@param Trb The TRB to be checked
@param Urb The transfer ring to be checked.
@retval TRUE It is a transaction of the URB.
@retval FALSE It is not any transaction of the URB.
**/
BOOLEAN
IsTransferRingTrb (
IN TRB_TEMPLATE *Trb,
IN URB *Urb
)
{
TRB_TEMPLATE *CheckedTrb;
UINTN Index;
CheckedTrb = Urb->Ring->RingSeg0;
ASSERT (Urb->Ring->TrbNumber == CMD_RING_TRB_NUMBER || Urb->Ring->TrbNumber == TR_RING_TRB_NUMBER);
for (Index = 0; Index < Urb->Ring->TrbNumber; Index++) {
if (Trb == CheckedTrb) {
if (IsTransferRingTrb (Xhc, Trb, CheckedUrb)) {
*Urb = CheckedUrb;
return TRUE;
}
CheckedTrb++;
}
return FALSE;
}
/**
Check the URB's execution result and update the URB's
result accordingly.
@ -1131,7 +1129,7 @@ XhcCheckUrbResult (
// This way is used to avoid that those completed async transfer events don't get
// handled in time and are flushed by newer coming events.
//
if (IsTransferRingTrb (TRBPtr, Urb)) {
if (IsTransferRingTrb (Xhc, TRBPtr, Urb)) {
CheckedUrb = Urb;
} else if (IsAsyncIntTrb (Xhc, TRBPtr, &AsyncUrb)) {
CheckedUrb = AsyncUrb;