Looks good to me. Reviewed-by: Krzysztof Lewandowski ________________________________ From: Cai, Xianglei Sent: Wednesday, April 10, 2024 09:01 To: devel@edk2.groups.io Cc: Cai, Xianglei ; Ni, Ray ; Liming Gao ; Lewandowski, Krzysztof ; Huang, Jenny ; Shih, More ; Chiu, Ian Subject: [PATCH 1/1] MdeModulePkg/XhciDxe: Add PCD for the delay of HCRST https://bugzilla.tianocore.org/show_bug.cgi?id=4727 Recently some of XHCI host controllers require to have extra 1ms delay before accessing any MMIO register during reset. PHY transition from P3 to P0 can take around 1.3ms and the xHCI reset can take around 1.5ms. Add PCD to control the delay, the default is 2 ms. Cc: Ray Ni Cc: Liming Gao Cc: Krzysztof Lewandowski Cc: Jenny Huang Cc: More Shih Cc: Ian Chiu Signed-off-by: Xianglei Cai --- MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h | 1 + MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf | 4 ++++ MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c | 2 +- MdePkg/MdePkg.dec | 4 ++++ MdePkg/MdePkg.dsc | 1 + 5 files changed, 11 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h index 44016758724c..c9a12095c29e 100644 --- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h +++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h @@ -28,6 +28,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include #include #include +#include #include diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf b/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf index 18ef87916ae4..2ee4c22d1e32 100644 --- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf +++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf @@ -56,6 +56,7 @@ DebugLib ReportStatusCodeLib TimerLib + PcdLib [Guids] gEfiEventExitBootServicesGuid ## SOMETIMES_CONSUMES ## Event @@ -64,6 +65,9 @@ gEfiPciIoProtocolGuid ## TO_START gEfiUsb2HcProtocolGuid ## BY_START +[Pcd] + gEfiMdePkgTokenSpaceGuid.PcdDelayXhciHCReset ## CONSUMES + # [Event] # EVENT_TYPE_PERIODIC_TIMER ## CONSUMES # diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c index 40f2f1f22766..525942a167b0 100644 --- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c +++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c @@ -864,7 +864,7 @@ XhcResetHC ( // Otherwise there may have the timeout case happened. // The below is a workaround to solve such problem. // - gBS->Stall (XHC_1_MILLISECOND); + gBS->Stall (PcdGet16 (PcdDelayXhciHCReset)); Status = XhcWaitOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET, FALSE, Timeout); if (!EFI_ERROR (Status)) { diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec index 0459418906f8..a5b3ce94072c 100644 --- a/MdePkg/MdePkg.dec +++ b/MdePkg/MdePkg.dec @@ -2510,5 +2510,9 @@ # @Prompt Memory encryption attribute gEfiMdePkgTokenSpaceGuid.PcdConfidentialComputingGuestAttr|0|UINT64|0x0000002e + ## This dynamic PCD indicates time delay for XHCI registers access after it issues HCRST. + # @Prompt Delay access XHCI register after it issues HCRST (us) + gEfiMdePkgTokenSpaceGuid.PcdDelayXhciHCReset|2000|UINT16|0x00000043 + [UserExtensions.TianoCore."ExtraFiles"] MdePkgExtra.uni diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc index 109224c527f7..23aea04fea2e 100644 --- a/MdePkg/MdePkg.dsc +++ b/MdePkg/MdePkg.dsc @@ -31,6 +31,7 @@ gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask|0x0f gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0x80000000 gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress|0xE0000000 + gEfiMdePkgTokenSpaceGuid.PcdDelayXhciHCReset|2000 [LibraryClasses] SafeIntLib|MdePkg/Library/BaseSafeIntLib/BaseSafeIntLib.inf -- 2.42.0.windows.2 --------------------------------------------------------------------- Intel Technology Poland sp. z o.o. ul. Slowackiego 173 | 80-298 Gdansk | Sad Rejonowy Gdansk Polnoc | VII Wydzial Gospodarczy Krajowego Rejestru Sadowego - KRS 101882 | NIP 957-07-52-316 | Kapital zakladowy 200.000 PLN. Spolka oswiadcza, ze posiada status duzego przedsiebiorcy w rozumieniu ustawy z dnia 8 marca 2013 r. o przeciwdzialaniu nadmiernym opoznieniom w transakcjach handlowych. Ta wiadomosc wraz z zalacznikami jest przeznaczona dla okreslonego adresata i moze zawierac informacje poufne. W razie przypadkowego otrzymania tej wiadomosci, prosimy o powiadomienie nadawcy oraz trwale jej usuniecie; jakiekolwiek przegladanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited. -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#117587): https://edk2.groups.io/g/devel/message/117587 Mute This Topic: https://groups.io/mt/105171188/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=-=-=-=-=-=-=-=-=-=-=-