sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MdeModulePkg/Usb: Boost the r/w performance by reducing stall time on polling cmd execution status

Browse Source 
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Elvin Li <elvin.li@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14442 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Feng Tian
2013-06-24 03:03:55 +00:00
committed by erictian
parent 22feb630eb
commit ca24313165
13 changed files with 104 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
MdeModulePkg/Bus/Pci/EhciPei/EhciSched.c
View File

@ -2,7 +2,7 @@
PEIM to produce gPeiUsb2HostControllerPpiGuid based on gPeiUsbControllerPpiGuid
which is used to enable recovery function from USB Drivers.
Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
@ -425,19 +425,29 @@ EhcExecTransfer (
UINTN Index;
UINTN Loop;
BOOLEAN Finished;
BOOLEAN InfiniteLoop;
Status = EFI_SUCCESS;
Loop = (TimeOut * EHC_1_MILLISECOND / EHC_SYNC_POLL_INTERVAL) + 1;
Finished = FALSE;
Loop = TimeOut * EHC_1_MILLISECOND;
Finished = FALSE;
InfiniteLoop = FALSE;
for (Index = 0; Index < Loop; Index++) {
//
// If Timeout is 0, then the caller must wait for the function to be completed
// until EFI_SUCCESS or EFI_DEVICE_ERROR is returned.
//
if (TimeOut == 0) {
InfiniteLoop = TRUE;
}
for (Index = 0; InfiniteLoop || (Index < Loop); Index++) {
Finished = EhcCheckUrbResult (Ehc, Urb);
if (Finished) {
break;
}
MicroSecondDelay (EHC_SYNC_POLL_INTERVAL);
MicroSecondDelay (EHC_1_MICROSECOND);
}
if (!Finished) {