From: Albecki, Mateusz <mateusz.albecki@intel.com>
Date: Fri, 21 Jun 2019 15:27:02 +0000 (+0800)
Subject: MdeModulePkg/UfsPassThruDxe: Refactor UFS device presence detection
X-Git-Tag: edk2-stable201908~338
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=f426d8744f3f5321cd88b23cf6e93865d5d18e00;p=mirror_edk2.git

MdeModulePkg/UfsPassThruDxe: Refactor UFS device presence detection

In current implementation we are checking for device presence every
time we execute UIC command. To make UfsExecUicCommands more generic
checking device presence has been moved to UfsDeviceDetection.

Signed-off-by: Mateusz Albecki <mateusz.albecki@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
---

diff --git a/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThruHci.c b/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThruHci.c
index 4b93821f38..633f975e30 100644
--- a/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThruHci.c
+++ b/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThruHci.c
@@ -1534,7 +1534,7 @@ Exit1:
 
 
 /**
-  Sent UIC DME_LINKSTARTUP command to start the link startup procedure.
+  Send UIC command.
 
   @param[in] Private          The pointer to the UFS_PASS_THRU_PRIVATE_DATA data structure.
   @param[in] UicOpcode        The opcode of the UIC command.
@@ -1544,7 +1544,6 @@ Exit1:
 
   @return EFI_SUCCESS      Successfully execute this UIC command and detect attached UFS device.
   @return EFI_DEVICE_ERROR Fail to execute this UIC command and detect attached UFS device.
-  @return EFI_NOT_FOUND    The presence of the UFS device isn't detected.
 
 **/
 EFI_STATUS
@@ -1629,24 +1628,6 @@ UfsExecUicCommands (
     }
   }
 
-  //
-  // Check value of HCS.DP and make sure that there is a device attached to the Link.
-  //
-  Status = UfsMmioRead32 (Private, UFS_HC_STATUS_OFFSET, &Data);
-  if (EFI_ERROR (Status)) {
-    return Status;
-  }
-
-  if ((Data & UFS_HC_HCS_DP) == 0) {
-    Status  = UfsWaitMemSet (Private, UFS_HC_IS_OFFSET, UFS_HC_IS_ULSS, UFS_HC_IS_ULSS, UFS_TIMEOUT);
-    if (EFI_ERROR (Status)) {
-      return EFI_DEVICE_ERROR;
-    }
-    return EFI_NOT_FOUND;
-  }
-
-  DEBUG ((DEBUG_INFO, "UfsPassThruDxe: found a attached UFS device\n"));
-
   return EFI_SUCCESS;
 }
 
@@ -1820,8 +1801,9 @@ UfsDeviceDetection (
   IN  UFS_PASS_THRU_PRIVATE_DATA     *Private
   )
 {
-  UINTN                  Retry;
-  EFI_STATUS             Status;
+  UINTN       Retry;
+  EFI_STATUS  Status;
+  UINT32      Data;
 
   //
   // Start UFS device detection.
@@ -1829,22 +1811,26 @@ UfsDeviceDetection (
   //
   for (Retry = 0; Retry < 3; Retry++) {
     Status = UfsExecUicCommands (Private, UfsUicDmeLinkStartup, 0, 0, 0);
-    if (!EFI_ERROR (Status)) {
-      break;
+    if (EFI_ERROR (Status)) {
+      return EFI_DEVICE_ERROR;
     }
 
-    if (Status == EFI_NOT_FOUND) {
-      continue;
+    Status = UfsMmioRead32 (Private, UFS_HC_STATUS_OFFSET, &Data);
+    if (EFI_ERROR (Status)) {
+      return EFI_DEVICE_ERROR;
     }
 
-    return EFI_DEVICE_ERROR;
-  }
-
-  if (Retry == 3) {
-    return EFI_NOT_FOUND;
+    if ((Data & UFS_HC_HCS_DP) == 0) {
+      Status = UfsWaitMemSet (Private, UFS_HC_IS_OFFSET, UFS_HC_IS_ULSS, UFS_HC_IS_ULSS, UFS_TIMEOUT);
+      if (EFI_ERROR (Status)) {
+        return EFI_DEVICE_ERROR;
+      }
+    } else {
+      return EFI_SUCCESS;
+    }
   }
 
-  return EFI_SUCCESS;
+  return EFI_NOT_FOUND;
 }
 
 /**