[edk2-devel] MdeModulePkg: Use configurable PCD for AHCI command retries

[Anbazhagan, Baraneedharan via groups.io]

https://bugzilla.tianocore.org/show_bug.cgi?id=4011

AHCI commands are retried internally which prevents platform feature
like drive password to process correctly entered password on subsequent
attempts. PCD allows the platform to determine the number of retries.

Signed-off-by: Baraneedharan Anbazhagan anbazhagan at hp.com<mailto:anbazhagan at hp.com>
---
MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c           | 6 +++---
MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.h           | 2 --
MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf | 3 ++-
MdeModulePkg/MdeModulePkg.dec                              | 4 ++++
4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
index a240be940d..bf8105d4e7 100644
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
@@ -983,7 +983,7 @@ AhciPioTransfer (
   CmdList.AhciCmdCfl = EFI_AHCI_FIS_REGISTER_H2D_LENGTH / 4;
   CmdList.AhciCmdW   = Read ? 0 : 1;
-  for (Retry = 0; Retry < AHCI_COMMAND_RETRIES; Retry++) {
+  for (Retry = 0; Retry < PcdGet32 (PcdAhciCommandRetryCount); Retry++) {
     AhciBuildCommand (
       PciIo,
       AhciRegisters,
@@ -1190,7 +1190,7 @@ AhciDmaTransfer (
     }
     gBS->RestoreTPL (OldTpl);
-    for (Retry = 0; Retry < AHCI_COMMAND_RETRIES; Retry++) {
+    for (Retry = 0; Retry < PcdGet32 (PcdAhciCommandRetryCount); Retry++) {
       AhciBuildCommand (
         PciIo,
         AhciRegisters,
@@ -1385,7 +1385,7 @@ AhciNonDataTransfer (
   CmdList.AhciCmdCfl = EFI_AHCI_FIS_REGISTER_H2D_LENGTH / 4;
-  for (Retry = 0; Retry < AHCI_COMMAND_RETRIES; Retry++) {
+  for (Retry = 0; Retry < PcdGet32 (PcdAhciCommandRetryCount); Retry++) {
     AhciBuildCommand (
       PciIo,
       AhciRegisters,
diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.h b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.h
index 7802ebd200..66256bf718 100644
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.h
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.h
@@ -193,8 +193,6 @@ typedef union {
#define   AHCI_PORT_DEVSLP_DITO_MASK      0x01FF8000
#define   AHCI_PORT_DEVSLP_DM_MASK        0x1E000000
-#define AHCI_COMMAND_RETRIES  5
-
#pragma pack(1)
//
// Command List structure includes total 32 entries.
diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf
index a3e42a9ab4..78caa3c458 100644
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf
@@ -65,7 +65,8 @@
   gEdkiiAtaAtapiPolicyProtocolGuid              ## CONSUMES
 [Pcd]
-  gEfiMdeModulePkgTokenSpaceGuid.PcdAtaSmartEnable   ## SOMETIMES_CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdAtaSmartEnable          ## SOMETIMES_CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdAhciCommandRetryCount   ## SOMETIMES_CONSUMES
 # [Event]
# EVENT_TYPE_PERIODIC_TIMER ## SOMETIMES_CONSUMES
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 7d98910832..58e6ab0048 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -1574,6 +1574,10 @@
   # @Prompt SD/MMC Host Controller Operations Timeout (us).
   gEfiMdeModulePkgTokenSpaceGuid.PcdSdMmcGenericTimeoutValue|1000000|UINT32|0x00000031
+  ## The Retry Count of AHCI command if there is a failure
+  # @Prompt The value of Retry Count,  Default value is 5.
+  gEfiMdeModulePkgTokenSpaceGuid.PcdAhciCommandRetryCount|5|UINT32|0x00000032
+
[PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
   ## This PCD defines the Console output row. The default value is 25 according to UEFI spec.
   #  This PCD could be set to 0 then console output would be at max column and max row.
--
2.36.1.windows.1



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