public inbox for devel@edk2.groups.io
 help / color / mirror / Atom feed
From: "Javeed, Ashraf" <ashraf.javeed@intel.com>
To: "devel@edk2.groups.io" <devel@edk2.groups.io>,
	"Javeed, Ashraf" <ashraf.javeed@intel.com>
Cc: "Wang, Jian J" <jian.j.wang@intel.com>,
	"Wu, Hao A" <hao.a.wu@intel.com>, "Ni, Ray" <ray.ni@intel.com>
Subject: Re: [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 05/12] PciBusDxe: New PCI Express feature Relax Ordering
Date: Fri, 7 Feb 2020 20:21:55 +0000	[thread overview]
Message-ID: <95C5C2B113DE604FB208120C742E9824579AAFC3@BGSMSX101.gar.corp.intel.com> (raw)
In-Reply-To: <15F1378301D514E4.15938@groups.io>

This patch can also be viewed in the following repo:-
https://github.com/ashrafj/edk2-staging/commit/27d11f3bbba23ff8b55d67da3cc50f8ee6029103

Thanks
Ashraf

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Javeed,
> Ashraf
> Sent: Saturday, February 8, 2020 1:35 AM
> To: devel@edk2.groups.io
> Cc: Wang, Jian J <jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>;
> Ni, Ray <ray.ni@intel.com>
> Subject: [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 05/12]
> PciBusDxe: New PCI Express feature Relax Ordering
> 
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2313
> 
> The code changes are made to enable the configuration of PCI Express feature
> Relax Ordering (OR), that enables the PCI function to initiate requests if it does
> not require strong write ordering for its transact- ions; as per the PCI Express
> Base Specification 4 Revision 1.
> 
> The code changes are made to configure only those PCI devices which are
> requested by platform for override, through the new PCI Express Platform
> protocol interface for device-specific policies.
> 
> Signed-off-by: Ashraf Javeed <ashraf.javeed@intel.com>
> Cc: Jian J Wang <jian.j.wang@intel.com>
> Cc: Hao A Wu <hao.a.wu@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> ---
>  MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h             |  4 ++++
>  MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.c | 70
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++++
>  MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.h | 18
> ++++++++++++++++++  MdeModulePkg/Bus/Pci/PciBusDxe/PciFeatureSupport.c
> |  5 ++++-  MdeModulePkg/Bus/Pci/PciBusDxe/PciPlatformSupport.c | 61
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 157 insertions(+), 1 deletion(-)
> 
> diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
> b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
> index 77b44c0..d3d795d 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h
> @@ -287,8 +287,12 @@ struct _PCI_IO_DEVICE {
>    // This field is used to support this case.
>    //
>    UINT16                                    BridgeIoAlignment;
> +  //
> +  // PCI Express features setup flags
> +  //
>    UINT8                                     SetupMPS;
>    UINT8                                     SetupMRRS;
> +  PCI_FEATURE_POLICY                        SetupRO;
>  };
> 
>  #define PCI_IO_DEVICE_FROM_PCI_IO_THIS(a) \ diff --git
> a/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.c
> b/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.c
> index 2810158..3262b76 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.c
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.c
> @@ -381,3 +381,73 @@ ProgramMaxReadReqSize (
>    return Status;
>  }
> 
> +/**
> +  Overrides the PCI Device Control register Relax Order register field;
> +if
> +  the hardware value is different than the intended value.
> +
> +  @param  PciDevice             A pointer to the PCI_IO_DEVICE instance.
> +
> +  @retval EFI_SUCCESS           The data was read from or written to the PCI
> device.
> +  @retval EFI_UNSUPPORTED       The address range specified by Offset, Width,
> and Count is not
> +                                valid for the PCI configuration header of the PCI controller.
> +  @retval EFI_INVALID_PARAMETER Buffer is NULL or Width is invalid.
> +
> +**/
> +EFI_STATUS
> +ProgramRelaxOrder (
> +  IN PCI_IO_DEVICE          *PciDevice,
> +  IN VOID                   *PciExFeatureConfiguration
> +  )
> +{
> +  PCI_REG_PCIE_DEVICE_CONTROL PcieDev;
> +  UINT32                      Offset;
> +  EFI_STATUS                  Status;
> +  EFI_TPL                     OldTpl;
> +
> +  PcieDev.Uint16 = 0;
> +  Offset = PciDevice->PciExpressCapabilityOffset +
> +               OFFSET_OF (PCI_CAPABILITY_PCIEXP, DeviceControl);
> + Status = PciDevice->PciIo.Pci.Read (
> +                                  &PciDevice->PciIo,
> +                                  EfiPciIoWidthUint16,
> +                                  Offset,
> +                                  1,
> +                                  &PcieDev.Uint16
> +                                  );
> +  ASSERT (Status == EFI_SUCCESS);
> +
> +  if (PciDevice->SetupRO.Override
> +      &&  PcieDev.Bits.RelaxedOrdering != PciDevice->SetupRO.Act
> +      ) {
> +    PcieDev.Bits.RelaxedOrdering = PciDevice->SetupRO.Act;
> +    DEBUG (( DEBUG_INFO, "RO=%d,", PciDevice->SetupRO.Act));
> +
> +    //
> +    // Raise TPL to high level to disable timer interrupt while the write operation
> completes
> +    //
> +    OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
> +
> +    Status = PciDevice->PciIo.Pci.Write (
> +                                    &PciDevice->PciIo,
> +                                    EfiPciIoWidthUint16,
> +                                    Offset,
> +                                    1,
> +                                    &PcieDev.Uint16
> +                                    );
> +    //
> +    // Restore TPL to its original level
> +    //
> +    gBS->RestoreTPL (OldTpl);
> +
> +    if (!EFI_ERROR(Status)) {
> +      PciDevice->PciExpressCapabilityStructure.DeviceControl.Uint16 =
> PcieDev.Uint16;
> +    } else {
> +      ReportPciWriteError (PciDevice->BusNumber, PciDevice->DeviceNumber,
> PciDevice->FunctionNumber, Offset);
> +    }
> +  } else {
> +    DEBUG (( DEBUG_INFO, "No RO,", PciDevice->SetupRO.Act));  }
> +
> +  return Status;
> +}
> +
> diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.h
> b/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.h
> index b43fba7..0d17801 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.h
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciExpressFeatures.h
> @@ -97,4 +97,22 @@ ProgramMaxReadReqSize (
>    IN VOID                   *PciExFeatureConfiguration
>    );
> 
> +/**
> +  Overrides the PCI Device Control register Relax Order register field;
> +if
> +  the hardware value is different than the intended value.
> +
> +  @param  PciDevice             A pointer to the PCI_IO_DEVICE instance.
> +
> +  @retval EFI_SUCCESS           The data was read from or written to the PCI
> device.
> +  @retval EFI_UNSUPPORTED       The address range specified by Offset, Width,
> and Count is not
> +                                valid for the PCI configuration header of the PCI controller.
> +  @retval EFI_INVALID_PARAMETER Buffer is NULL or Width is invalid.
> +
> +**/
> +EFI_STATUS
> +ProgramRelaxOrder (
> +  IN PCI_IO_DEVICE          *PciDevice,
> +  IN VOID                   *PciExFeatureConfiguration
> +  );
> +
>  #endif
> diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciFeatureSupport.c
> b/MdeModulePkg/Bus/Pci/PciBusDxe/PciFeatureSupport.c
> index 1caf1f4..267f570 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciFeatureSupport.c
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciFeatureSupport.c
> @@ -42,7 +42,7 @@ EFI_PCI_EXPRESS_PLATFORM_POLICY
> mPciExpressPlatformPolicy = {
>      //
>      // support for PCI Express feature - Relax Order
>      //
> -    FALSE,
> +    TRUE,
>      //
>      // support for PCI Express feature - No-Snoop
>      //
> @@ -113,6 +113,9 @@ PCI_EXPRESS_FEATURE_INITIALIZATION_POINT
> mPciExpressFeatureInitializationList[]
>    },
>    {
>      PciExpressFeatureProgramPhase,        PciExpressMrrs,
> ProgramMaxReadReqSize
> +  },
> +  {
> +    PciExpressFeatureProgramPhase,        PciExpressRelaxOrder,
> ProgramRelaxOrder
>    }
>  };
> 
> diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciPlatformSupport.c
> b/MdeModulePkg/Bus/Pci/PciBusDxe/PciPlatformSupport.c
> index f74e566..40eb8a3 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciPlatformSupport.c
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciPlatformSupport.c
> @@ -149,6 +149,45 @@ SetDevicePolicyPciExpressMrrs (
>    }
>  }
> 
> +/**
> +  Routine to set the device-specific policy for the PCI feature Relax
> +Ordering
> +
> +  @param  RelaxOrder    value corresponding to data type
> EFI_PCI_EXPRESS_RELAX_ORDER
> +  @param  PciDevice     A pointer to PCI_IO_DEVICE
> +**/
> +VOID
> +SetDevicePolicyPciExpressRo (
> +  IN  EFI_PCI_EXPRESS_RELAX_ORDER RelaxOrder,
> +  OUT PCI_IO_DEVICE               *PciDevice
> +  )
> +{
> +  //
> +  // implementation specific rules for the usage of PCI_FEATURE_POLICY
> +members
> +  // exclusively for the PCI Feature Relax Ordering (RO)
> +  //
> +  // .Override = 0 to skip this PCI feature RO for the PCI device
> +  // .Override = 1 to program this RO PCI feature
> +  //      .Act = 1 to enable the RO in the PCI device
> +  //      .Act = 0 to disable the RO in the PCI device
> +  //
> +  switch (RelaxOrder) {
> +    case  EFI_PCI_EXPRESS_RO_AUTO:
> +      PciDevice->SetupRO.Override = 0;
> +      break;
> +    case  EFI_PCI_EXPRESS_RO_DISABLE:
> +      PciDevice->SetupRO.Override = 1;
> +      PciDevice->SetupRO.Act = 0;
> +      break;
> +    case  EFI_PCI_EXPRESS_RO_ENABLE:
> +      PciDevice->SetupRO.Override = 1;
> +      PciDevice->SetupRO.Act = 1;
> +      break;
> +    default:
> +      PciDevice->SetupRO.Override = 0;
> +      break;
> +  }
> +}
> +
>  /**
>    Generic routine to setup the PCI features as per its predetermined defaults.
>  **/
> @@ -170,6 +209,8 @@ SetupDefaultPciExpressDevicePolicy (
>      PciDevice->SetupMRRS = EFI_PCI_EXPRESS_NOT_APPLICABLE;
>    }
> 
> +  PciDevice->SetupRO.Override = 0;
> +
>  }
> 
>  /**
> @@ -259,6 +300,15 @@ GetPciExpressDevicePolicy (
>      } else {
>        PciDevice->SetupMRRS = EFI_PCI_EXPRESS_NOT_APPLICABLE;
>      }
> +    //
> +    // set device specific policy for Relax Ordering
> +    //
> +    if (mPciExpressPlatformPolicy.RelaxOrder) {
> +      SetDevicePolicyPciExpressRo (PciExpressDevicePolicy.DeviceCtlRelaxOrder,
> PciDevice);
> +    } else {
> +      PciDevice->SetupRO.Override = 0;
> +    }
> +
> 
>      DEBUG ((
>        DEBUG_INFO,
> @@ -438,6 +488,17 @@ PciExpressPlatformNotifyDeviceState (
>    } else {
>      PciExDeviceConfiguration.DeviceCtlMRRS =
> EFI_PCI_EXPRESS_NOT_APPLICABLE;
>    }
> +  //
> +  // get the device-specific state for the PCIe Relax Order feature  //
> + if (mPciExpressPlatformPolicy.RelaxOrder) {
> +    PciExDeviceConfiguration.DeviceCtlRelaxOrder = PciDevice-
> >PciExpressCapabilityStructure.DeviceControl.Bits.RelaxedOrdering
> +                                                      ? EFI_PCI_EXPRESS_RO_ENABLE
> +                                                      :
> + EFI_PCI_EXPRESS_RO_DISABLE;  } else {
> +    PciExDeviceConfiguration.DeviceCtlRelaxOrder =
> + EFI_PCI_EXPRESS_NOT_APPLICABLE;  }
> +
> 
>    if (mPciExPlatformProtocol != NULL) {
>      return mPciExPlatformProtocol->NotifyDeviceState (
> --
> 2.21.0.windows.1
> 
> 
> 


  parent reply	other threads:[~2020-02-07 20:22 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-07 20:04 [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 00/12] PciBusDxe: New PCI Express features Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 01/12] MdeModulePkg/PciBusDxe: Setup for " Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 02/12] MdeModulePkg/PciBusDxe: Setup PCI Express init phase Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 03/12] PciBusDxe: New PCI Express feature Max_Payload_Size Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 04/12] PciBusDxe: New PCI Express feature Max_Read_Req_Size Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 05/12] PciBusDxe: New PCI Express feature Relax Ordering Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 06/12] PciBusDxe: New PCI Express feature No-Snoop Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 07/12] PciBusDxe: New PCI Express feature Completion Timeout Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 08/12] PciBusDxe: New PCI Express feature AtomicOp Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 09/12] PciBusDxe: New PCI Express feature LTR Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 10/12] PciBusDxe: New PCI Express feature Extended Tag Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 11/12] PciBusDxe: New PCI Express feature ASPM support Javeed, Ashraf
2020-02-07 20:04 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 12/12] PciBusDxe: New PCI Express feature Common CLock Config Javeed, Ashraf
     [not found] ` <15F1377EA7D1AA4F.7869@groups.io>
2020-02-07 20:16   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 01/12] MdeModulePkg/PciBusDxe: Setup for PCI Express features Javeed, Ashraf
2020-02-10  7:20     ` Ni, Ray
2020-02-10  8:26       ` Javeed, Ashraf
2020-02-10  8:37         ` Ni, Ray
2020-02-11  3:59           ` Javeed, Ashraf
     [not found] ` <15F137802DC889C4.7869@groups.io>
2020-02-07 20:18   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 02/12] MdeModulePkg/PciBusDxe: Setup PCI Express init phase Javeed, Ashraf
2020-02-10  7:37     ` Ni, Ray
2020-02-10  8:32       ` Javeed, Ashraf
2020-02-10  8:46         ` Ni, Ray
2020-02-11  7:14           ` Javeed, Ashraf
     [not found] ` <15F137813D8F0C21.4848@groups.io>
2020-02-07 20:19   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 03/12] PciBusDxe: New PCI Express feature Max_Payload_Size Javeed, Ashraf
     [not found] ` <15F13782B6D7AE2E.15938@groups.io>
2020-02-07 20:20   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 04/12] PciBusDxe: New PCI Express feature Max_Read_Req_Size Javeed, Ashraf
     [not found] ` <15F1378301D514E4.15938@groups.io>
2020-02-07 20:21   ` Javeed, Ashraf [this message]
     [not found] ` <15F1378385E00982.18602@groups.io>
2020-02-07 20:22   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 06/12] PciBusDxe: New PCI Express feature No-Snoop Javeed, Ashraf
     [not found] ` <15F137842EDDF11D.15938@groups.io>
2020-02-07 20:24   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 07/12] PciBusDxe: New PCI Express feature Completion Timeout Javeed, Ashraf
     [not found] ` <15F13784AAF69472.18602@groups.io>
2020-02-07 20:25   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 08/12] PciBusDxe: New PCI Express feature AtomicOp Javeed, Ashraf
     [not found]   ` <15F1389AA432C2B6.18602@groups.io>
2020-02-07 20:27     ` Javeed, Ashraf
     [not found] ` <15F13785436D3273.18602@groups.io>
2020-02-07 20:28   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 09/12] PciBusDxe: New PCI Express feature LTR Javeed, Ashraf
     [not found] ` <15F137861A640F9F.15938@groups.io>
2020-02-07 20:29   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 10/12] PciBusDxe: New PCI Express feature Extended Tag Javeed, Ashraf
     [not found] ` <15F13786546CB2AB.15938@groups.io>
2020-02-07 20:30   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 11/12] PciBusDxe: New PCI Express feature ASPM support Javeed, Ashraf
     [not found] ` <15F13786E92D19E9.15938@groups.io>
2020-02-07 20:31   ` [edk2-devel] [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 12/12] PciBusDxe: New PCI Express feature Common CLock Config Javeed, Ashraf
2020-02-10  7:40 ` [edk2-staging/UEFI_PCI_ENHANCE-2 PATCH 00/12] PciBusDxe: New PCI Express features Ni, Ray
2020-02-10  8:34   ` Javeed, Ashraf

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-list from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=95C5C2B113DE604FB208120C742E9824579AAFC3@BGSMSX101.gar.corp.intel.com \
    --to=devel@edk2.groups.io \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox