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author | Star Zeng <star.zeng@intel.com> | 2018-10-25 16:20:27 +0800 |
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committer | Star Zeng <star.zeng@intel.com> | 2018-10-28 21:20:08 +0800 |
commit | 777920997152a2e68f664241f6080b64ff21edd6 (patch) | |
tree | 98b3da38fcdc859230b9485368a320cd51604bdd /MdeModulePkg/Bus/Pci/EhciDxe/EhciSched.c | |
parent | 4f792685e476dfd1e777033492207335ea804c9f (diff) | |
download | edk2-777920997152a2e68f664241f6080b64ff21edd6.tar.gz edk2-777920997152a2e68f664241f6080b64ff21edd6.tar.bz2 edk2-777920997152a2e68f664241f6080b64ff21edd6.zip |
MdeModulePkg XhciDxe: Use common buffer for AsyncInterruptTransfer
V3:
Call XhcFreeUrb after XhcCreateTransferTrb fails in XhcCreateTrb.
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1274
In current code, XhcMonitorAsyncRequests (timer handler) will do
unmap and map operations for AsyncIntTransfers to "Flush data from
PCI controller specific address to mapped system memory address".
XhcMonitorAsyncRequests
XhcFlushAsyncIntMap
PciIo->Unmap
IoMmu->SetAttribute
PciIo->Map
IoMmu->SetAttribute
This may impact the boot performance.
Since the data buffer for XhcMonitorAsyncRequests is internal
buffer, we can allocate common buffer by PciIo->AllocateBuffer
and map the buffer with EfiPciIoOperationBusMasterCommonBuffer,
then the unmap and map operations can be removed.
///
/// Provides both read and write access to system memory by
/// both the processor and a bus master. The buffer is coherent
/// from both the processor's and the bus master's point of view.
///
EfiPciIoOperationBusMasterCommonBuffer,
Test done:
USB KB works normally.
USB disk read/write works normally.
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
Diffstat (limited to 'MdeModulePkg/Bus/Pci/EhciDxe/EhciSched.c')
0 files changed, 0 insertions, 0 deletions