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Ip=[192.88.168.50]; Helo=[tx30smr01.am.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5SPR00MB106 Subject: [edk2] [RFC] SATA : Implemented NXP errata A008402 X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: quoted-printable Errors-To: edk2-devel-bounces@lists.01.org Sender: "edk2-devel" X-ZohoMail: RSF_4 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Description: Commands with 4 MB PRD length entries fail if PRD[DBC] is set to the value according to AHCI standard spec. Due to a logic error, 3F_FFFFh is misinterpreted by the device as zero length. Workaround: Set PRD length to 0 when creating a PRD entry for a maximum data transfer size of 4 MB to fix the erratum. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Meenakshi Aggarwal --- MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c | 2 +- MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf | 1 + MdeModulePkg/MdeModulePkg.dec | 3 +++ 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c b/MdeModulePk= g/Bus/Ata/AtaAtapiPassThru/AhciMode.c index e6de5d6..fb6dc0b 100644 --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c @@ -591,7 +591,7 @@ AhciBuildCommand ( if (RemainedData < EFI_AHCI_MAX_DATA_PER_PRDT) { AhciRegisters->AhciCommandTable->PrdtTable[PrdtIndex].AhciPrdtDbc = =3D (UINT32)RemainedData - 1; } else { - AhciRegisters->AhciCommandTable->PrdtTable[PrdtIndex].AhciPrdtDbc = =3D EFI_AHCI_MAX_DATA_PER_PRDT - 1; + AhciRegisters->AhciCommandTable->PrdtTable[PrdtIndex].AhciPrdtDbc = =3D PcdGet32 (PcdPrdtMaxDataLength); } =20 Data64.Uint64 =3D (UINT64)MemAddr; diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf b/M= deModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf index 82d5f7a..8921dd5 100644 --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf @@ -70,6 +70,7 @@ =20 [Pcd] gEfiMdeModulePkgTokenSpaceGuid.PcdAtaSmartEnable ## SOMETIMES_CONSUMES + gEfiMdeModulePkgTokenSpaceGuid.PcdPrdtMaxDataLength =20 # [Event] # EVENT_TYPE_PERIODIC_TIMER ## SOMETIMES_CONSUMES diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec index 8efad57..b2f9f2b 100644 --- a/MdeModulePkg/MdeModulePkg.dec +++ b/MdeModulePkg/MdeModulePkg.dec @@ -1434,6 +1434,9 @@ # @Prompt Console Output Row of Text Setup gEfiMdeModulePkgTokenSpaceGuid.PcdSetupConOutRow|25|UINT32|0x4000000e =20 + ## This PCD specifies the Maximum data length for a PRD Entry + gEfiMdeModulePkgTokenSpaceGuid.PcdPrdtMaxDataLength|0x3FFFFF|UINT32|0x40= 00000f + [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx] ## UART clock frequency is for the baud rate configuration. # @Prompt Serial Port Clock Rate. --=20 1.9.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel