[edk2-devel] [PATCH 1/1] MdeModulePkg\XhciDxe: Command Abort when times out

["Xianglei Cai" <xianglei.cai@intel.com>]

https://bugzilla.tianocore.org/show_bug.cgi?id=4552

CC: Hao A Wu     <hao.a.wu@intel.com>
CC: Ray Ni       <ray.ni@intel.com>
CC: Jian J Wang  <jian.j.wang@intel.com>
CC: Liming Gao   <gaoliming@byosoft.com.cn>
CC: More Shih    <more.shih@intel.com>
Signed-off-by: Xianglei Cai <xianglei.cai@intel.com>
---
 MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c | 35 ++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
index 53421e64a850..5024d5e3acb9 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.c
@@ -2121,6 +2121,29 @@ RingIntTransferDoorBell (
   return EFI_SUCCESS;
 }
 
+/**
+  Set Command abort
+
+  @param  Xhc           The XHCI Instance.
+  @param  SlotId        The slot id to be disabled.
+
+  @retval EFI_SUCCESS   Successfully disable the device slot.
+
+**/
+VOID
+XhcCmdRingCmdAbort (
+  IN USB_XHCI_INSTANCE  *Xhc,
+  IN UINT8              SlotId
+  )
+{
+  //
+  // Some 3rd party XHCI external cards don't support single 64-bytes width register access,
+  // So divide it to two 32-bytes width register access.
+  //
+  DEBUG ((DEBUG_INFO, "Command Ring Control set Command Abort, SlotId: %d!\n", SlotId));
+  XhcSetOpRegBit (Xhc, XHC_CRCR_OFFSET, XHC_CRCR_CA);
+}
+
 /**
   Assign and initialize the device slot for a new device.
 
@@ -2331,6 +2354,12 @@ XhcInitializeDeviceSlot (
     Xhc->UsbDevContext[SlotId].XhciDevAddr = DeviceAddress;
   } else {
     DEBUG ((DEBUG_ERROR, "    Slot %d address not assigned successfully. Status = %r\n", SlotId, Status));
+    //
+    // Software need abort the command if a command times out in xHCI spec 4.6.
+    //
+    if (Status == EFI_TIMEOUT) {
+      XhcCmdRingCmdAbort (Xhc, SlotId);
+    }
     XhcDisableSlotCmd (Xhc, SlotId);
   }
 
@@ -2547,6 +2576,12 @@ XhcInitializeDeviceSlot64 (
     Xhc->UsbDevContext[SlotId].XhciDevAddr = DeviceAddress;
   } else {
     DEBUG ((DEBUG_ERROR, "    Slot %d address not assigned successfully. Status = %r\n", SlotId, Status));
+    //
+    // Software need abort the command if a command times out in xHCI spec 4.6.
+    //
+    if (Status == EFI_TIMEOUT) {
+      XhcCmdRingCmdAbort (Xhc, SlotId);
+    }
     XhcDisableSlotCmd64 (Xhc, SlotId);
   }
 
-- 
2.42.0.windows.2



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