Does anyone know wow was the original #define 
of 128 selected?

If we are seeing compatibility issues with 128
and we have greater compatibility with 64, what
would be the impact of just changing the #define
to 64?

Thanks,

Mike

> -----Original Message-----
> From: Ming Huang [mailto:ming.hu...@linaro.org]
> Sent: Sunday, March 11, 2018 11:01 PM
> To: Ni, Ruiyu <ruiyu...@intel.com>;
> leif.lindh...@linaro.org; linaro-u...@lists.linaro.org;
> edk2-devel@lists.01.org; graeme.greg...@linaro.org;
> Zeng, Star <star.z...@intel.com>; Dong, Eric
> <eric.d...@intel.com>
> Cc: huangmin...@huawei.com; wanghuiqi...@huawei.com;
> ard.biesheu...@linaro.org; zhangjinso...@huawei.com;
> Kinney, Michael D <michael.d.kin...@intel.com>; Gao,
> Liming <liming....@intel.com>; guoh...@huawei.com;
> wai...@126.com; mengfanr...@huawei.com;
> huangda...@hisilicon.com
> Subject: Re: [edk2] [RFC v1 1/1] MdeModulePkg/Usb: Use
> Pcd for UsbBootIoBlocks
> 
> Any comments about this patch?
> 
> 
> On 2018/3/2 14:36, Ming Huang wrote:
> >
> > On 2018/2/27 18:01, Ni, Ruiyu wrote:
> >> On 2/27/2018 5:25 PM, Ming Huang wrote:
> >>>
> >>> On 2018/2/27 13:25, Ni, Ruiyu wrote:
> >>>> I don't prefer to add PCD, unless we cannot find:
> >>>> 1. spec content  to describe the max/min blocks
> >>> There is no spec about the max/min blocks in my
> mind. I had checked this in
> >>> several pdf document like
> >>> Universal Serial Bus Mass Storage Class
> Specification Overview,
> >>> Universal Serial Bus Mass Storage Specification For
> Bootability,
> >>> Universal Serial Bus Mass Storage Class Bulk-Only
> Transport.
> >>>> 2. error handling when the blocks number is bigger
> than HW expects.
> >>> Where should error handling add to?  Error handing
> can't add to HW (end-point device),
> >>> because HW is not in our control scope.
> >> I mean maybe spec describes an error status could be
> returned from HW when using 128. So that we can use 64,
> 32, and smaller value until HW is happy.
> >>
> >> I am curious how the other USB storage drivers handle
> this.
> >> PCD is a static way. Dynamic way is more preferred.
> >>
> > When using 128,  after waiting
> 5x5(USB_BOOT_COMMAND_RETRY=5,
> USB_BOOT_GENERAL_CMD_TIMEOUT=5) seconds,
> > the UsbBootReadBlocks ->UsbBootExecCmdWithRetry retrun
> TimeOut. I don't know why HW return Timeout.
> > Booting time is to long if using Dynamic way to fix
> the issue.
> > When using 64, It works and booting from HW succeed.
> > May be using PCD is a simple and effective mean.
> >
> > Thanks
> > Ming
> >>>> Thanks/Ray
> >>>>
> >>>>> -----Original Message-----
> >>>>> From: edk2-devel [mailto:edk2-devel-
> boun...@lists.01.org] On Behalf Of
> >>>>> Ming Huang
> >>>>> Sent: Saturday, February 24, 2018 5:30 PM
> >>>>> To: leif.lindh...@linaro.org; linaro-
> u...@lists.linaro.org; edk2-
> >>>>> de...@lists.01.org; graeme.greg...@linaro.org;
> Zeng, Star
> >>>>> <star.z...@intel.com>; Dong, Eric
> <eric.d...@intel.com>
> >>>>> Cc: huangmin...@huawei.com;
> ard.biesheu...@linaro.org; Ming Huang
> >>>>> <ming.hu...@linaro.org>; Gao, Liming
> <liming....@intel.com>;
> >>>>> mengfanr...@huawei.com; guoh...@huawei.com;
> >>>>> zhangjinso...@huawei.com; Kinney, Michael D
> >>>>> <michael.d.kin...@intel.com>; wai...@126.com;
> >>>>> wanghuiqi...@huawei.com; huangda...@hisilicon.com
> >>>>> Subject: [edk2] [RFC v1 1/1] MdeModulePkg/Usb: Use
> Pcd for
> >>>>> UsbBootIoBlocks
> >>>>>
> >>>>> Booting from USB may fail while the macro
> USB_BOOT_IO_BLOCKS set to 128
> >>>>> because 128 blocks is exceeded the maximun blocks
> of some USB
> >>>>> devices,like some virtual CD-ROM from BMC. So,
> give a chance to set the
> >>>>> value of USB_BOOT_IO_BLOCKS by adding a Pcd.
> >>>>>
> >>>>> Contributed-under: TianoCore Contribution
> Agreement 1.1
> >>>>> Signed-off-by: Ming Huang <ming.hu...@linaro.org>
> >>>>> ---
> >>>>>   MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBo
> ot.h         | 7
> >>>>> +++++--
> >>>>>   MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassSt
> orageDxe.inf | 4
> >>>>> ++++
> >>>>>   MdeModulePkg/MdeModulePkg.dec
>              | 4 ++++
> >>>>>   MdeModulePkg/MdeModulePkg.uni
>              | 4 ++++
> >>>>>   4 files changed, 17 insertions(+), 2 deletions(-
> )
> >>>>>
> >>>>> diff --git
> a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.h
> >>>>>
> b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.h
> >>>>> index 5ee50ac52a21..ca9240adbd5f 100644
> >>>>> ---
> a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.h
> >>>>> +++
> b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.h
> >>>>> @@ -16,6 +16,8 @@ WITHOUT WARRANTIES OR
> REPRESENTATIONS OF ANY
> >>>>> KIND, EITHER EXPRESS OR IMPLIED.
> >>>>>   #ifndef _EFI_USB_MASS_BOOT_H_
> >>>>>   #define _EFI_USB_MASS_BOOT_H_
> >>>>>
> >>>>> +#include <Library/PcdLib.h>
> >>>>> +
> >>>>>   //
> >>>>>   // The opcodes of various USB boot commands:
> >>>>>   // INQUIRY/REQUEST_SENSE are "No Timeout
> Commands" as specified @@
> >>>>> -66,9 +68,10 @@ WITHOUT WARRANTIES OR
> REPRESENTATIONS OF ANY
> >>>>> KIND, EITHER EXPRESS OR IMPLIED.
> >>>>>   #define
> USB_PDT_SIMPLE_DIRECT           0x0E       ///<
> Simplified direct access
> >>>>> device
> >>>>>
> >>>>>   //
> >>>>> -// Other parameters, Max carried size is 512B *
> 128 = 64KB
> >>>>> +// Other parameters, Max carried size is depanded
> on Pcd.
> >>>>> +// The default of PcdUsbBootIoBlocks is 128. 512B
> * 128 = 64KB
> >>>>>   //
> >>>>> -#define USB_BOOT_IO_BLOCKS              128
> >>>>> +#define
> USB_BOOT_IO_BLOCKS              (FixedPcdGet32
> >>>>> (PcdUsbBootIoBlocks))
> >>>>>
> >>>>>   //
> >>>>>   // Retry mass command times, set by experience
> diff --git
> >>>>>
> a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassStorageD
> xe.inf
> >>>>>
> b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassStorageD
> xe.inf
> >>>>> index 26d15c7679bf..40426512f884 100644
> >>>>> ---
> >>>>>
> a/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassStorageD
> xe.inf
> >>>>> +++
> >>>>>
> b/MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassStorageD
> xe.inf
> >>>>> @@ -60,6 +60,7 @@ [Sources]
> >>>>>     UsbMassDiskInfo.c
> >>>>>
> >>>>>   [Packages]
> >>>>> +  MdeModulePkg/MdeModulePkg.dec
> >>>>>     MdePkg/MdePkg.dec
> >>>>>
> >>>>>   [LibraryClasses]
> >>>>> @@ -83,5 +84,8 @@ [Protocols]
> >>>>>   # EVENT_TYPE_RELATIVE_TIMER        ## CONSUMES
> >>>>>   #
> >>>>>
> >>>>> +[FixedPcd]
> >>>>>
> +  gEfiMdeModulePkgTokenSpaceGuid.PcdUsbBootIoBlocks
> >>>>> +
> >>>>>   [UserExtensions.TianoCore."ExtraFiles"]
> >>>>>     UsbMassStorageDxeExtra.uni
> >>>>> diff --git a/MdeModulePkg/MdeModulePkg.dec
> >>>>> b/MdeModulePkg/MdeModulePkg.dec index
> 455979386e3f..fc40745315a0
> >>>>> 100644
> >>>>> --- a/MdeModulePkg/MdeModulePkg.dec
> >>>>> +++ b/MdeModulePkg/MdeModulePkg.dec
> >>>>> @@ -999,6 +999,10 @@ [PcdsFixedAtBuild]
> >>>>>     # @Prompt Enable UEFI Stack Guard.
> >>>>>
> >>>>>
> gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard|FALSE|BO
> OLEAN|0
> >>>>> x30001055
> >>>>>
> >>>>> +## The Max blocks of usb transfer. The default is
> 128.
> >>>>> +# @Prompt The Max blocks of usb transfer
> >>>>>
> +gEfiMdeModulePkgTokenSpaceGuid.PcdUsbBootIoBlocks|128|U
> INT32|0x0
> >>>>> 000010B
> >>>>> +
> >>>>>   [PcdsFixedAtBuild, PcdsPatchableInModule]
> >>>>>     ## Dynamic type PCD can be registered callback
> function for Pcd setting
> >>>>> action.
> >>>>>     #  PcdMaxPeiPcdCallBackNumberPerPcdEntry
> indicates the maximum
> >>>>> number of callback function diff --git
> a/MdeModulePkg/MdeModulePkg.uni
> >>>>> b/MdeModulePkg/MdeModulePkg.uni index
> f3fa616438b0..c996d6b4ebe0
> >>>>> 100644
> >>>>> --- a/MdeModulePkg/MdeModulePkg.uni
> >>>>> +++ b/MdeModulePkg/MdeModulePkg.uni
> >>>>> @@ -1243,3 +1243,7 @@
> >>>>>   #string
> >>>>>
> STR_gEfiMdeModulePkgTokenSpaceGuid_PcdEdkiiFpdtStringRec
> ordEnableO
> >>>>> nly_HELP    #language en-US "Control which FPDT
> record format will be used
> >>>>> to store the performance entry.\n"
> >>>>>
>                                                       "O
> n TRUE, the string FPDT
> >>>>> record will be used to store every performance
> entry.\n"
> >>>>>
>                                                       "O
> n FALSE, the different
> >>>>> FPDT record will be used to store the different
> performance entries."
> >>>>> +
> >>>>> +#string
> >>>>>
> STR_gEfiMdeModulePkgTokenSpaceGuid_PcdUsbBootIoBlocks_PR
> OMPT
> >>>>> #language en-US "The Max blocks of usb transfer."
> >>>>> +
> >>>>> +#string
> >>>>>
> STR_gEfiMdeModulePkgTokenSpaceGuid_PcdUsbBootIoBlocks_HE
> LP
> >>>>> #language en-US "The Max blocks of usb transfer.
> The default is 128."
> >>>>> --
> >>>>> 1.9.1
> >>>>>
> >>>>> _______________________________________________
> >>>>> edk2-devel mailing list
> >>>>> edk2-devel@lists.01.org
> >>>>> https://lists.01.org/mailman/listinfo/edk2-devel
> >>> _______________________________________________
> >>> edk2-devel mailing list
> >>> edk2-devel@lists.01.org
> >>> https://lists.01.org/mailman/listinfo/edk2-devel
> >>>
> >>

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