From 3cf6450eb581961e3618d29117b09b22605c99cd Mon Sep 17 00:00:00 2001
From: Feng Tian <feng.tian@intel.com>
Date: Thu, 6 Aug 2015 07:13:16 +0000
Subject: MdeModulePkg/Usb: Adjust TPL to not block async transfer during usb
 enum.

EDKII usb stack is using a TPL_CALLBACK timer to monitor async transfer
request and signal event if it's done. As usb enumeration and usb mass
storage block i/o read/write runs on TPL_CALLBACK and TPL_NOTIFY level
respectively, It blocks usb async transfer requests, usually usb mouse
/use kb, getting time to run.

Without this change, user couldn't get usb mouse/kb state in time (will
show a little lag from UI view) when there is other usb transactions, such
as a new usb device inserted.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18169 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c | 2 +-
 MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c | 2 +-
 MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

(limited to 'MdeModulePkg/Bus/Pci')

diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
index 315f2cbbdb..4e9e05f0e4 100644
--- a/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/Ehci.c
@@ -1615,7 +1615,7 @@ EhcCreateUsb2Hc (
   //
   Status = gBS->CreateEvent (
                   EVT_TIMER | EVT_NOTIFY_SIGNAL,
-                  TPL_CALLBACK,
+                  TPL_NOTIFY,
                   EhcMonitorAsyncRequests,
                   Ehc,
                   &Ehc->PollTimer
diff --git a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
index ad9c85c557..179e36c3a2 100644
--- a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
+++ b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
@@ -1482,7 +1482,7 @@ UhciAllocateDev (
 
   Status = gBS->CreateEvent (
                   EVT_TIMER | EVT_NOTIFY_SIGNAL,
-                  TPL_CALLBACK,
+                  TPL_NOTIFY,
                   UhciMonitorAsyncReqList,
                   Uhc,
                   &Uhc->AsyncIntMonitor
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
index 6143b200ab..390ca0a376 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.c
@@ -1822,7 +1822,7 @@ XhcCreateUsbHc (
   //
   Status = gBS->CreateEvent (
                   EVT_TIMER | EVT_NOTIFY_SIGNAL,
-                  TPL_CALLBACK,
+                  TPL_NOTIFY,
                   XhcMonitorAsyncRequests,
                   Xhc,
                   &Xhc->PollTimer
-- 
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