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[Xen-devel] [SOLVED] GPLPV SCSI passthrough does not working

To: xen-devel@xxxxxxxxxxxxx, yoshink@xxxxxxxxxxx
From: Kazuto Yoshino <yoshink@xxxxxxxxxxx>
Date: Fri, 08 Jun 2012 22:37:13 +0900
Delivery-date: Sun, 10 Jun 2012 03:42:19 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

Hi all,

SCSI passthrough of DVD drive is tried on Windows.
If vcpus=1 is used, it works.
However, if vcpus=2 is used, it does not work.
The log is as follows.


Hardware:
DELL Optiplex 990
Intel Core i5 2500


Software:
xen 4.2-unstable (25452:6bea63e6c780)
dom0: Linux 3.1.0-rc10+ 64bit
domU: Windows 7 SP1 64bit
GPLPV 0.10.0.357


domU config:
kernel = "hvmloader"
builder='hvm'
memory = 2048
name = "win7x64"
vcpus=2
vif = [ 'type=ioemu, mac=00:16:3e:19:18:7b, bridge=virbr0' ]
disk = [ 'file:/etc/xen/win7x64.img,hda,w' ]
device_model = 'qemu-dm'
sdl=0
opengl=1
vnc=1
vnclisten="0.0.0.0"
vncpasswd=''
stdvga=0
serial='pty'
tsc_mode=0


command:
# xm create /etc/xen/win7x64.hvm
# xm scsi-attach win7x64 1:0:0:0 2:0:0:0


qemu-dm log:
12983594247656: XenPCI --> XenPci_DeviceWatchHandler
12983594247656: XenPCI     Rescanning child list
12983594247656: XenPCI --> XenPci_EvtChildListScanForChildren
12983594247656: XenPCI     Found path = device/vbd/768
12983594247656: XenPCI     Found path = device/vif/0
12983594247671: XenPCI     Found path = device/vscsi/2
12983594247671: XenPCI <-- XenPci_EvtChildListScanForChildren
12983594247671: XenPCI --> XenPci_EvtChildListCreateDevice
12983594247671: XenPCI <-- XenPci_DeviceWatchHandler

12983594247671: XenPCI device = 'vscsi', index = '2', path ='device/vscsi/2'

12983594247671: XenPCI --> XenPci_DeviceWatchHandler
12983594247671: XenPCI <-- XenPci_EvtChildListCreateDevice
12983594247671: XenPCI <-- XenPci_DeviceWatchHandler
12983594247671: XenPCI --> XenPciPdo_EvtDeviceWdmIrpPreprocess_START_DEVICE
12983594247671: XenPCI --> XenPci_DeviceWatchHandler
12983594247671: XenPCI     device/vscsi/2
12983594247671: XenPCI <-- XenPci_DeviceWatchHandler
12983594247671: XenPCI     CmResourceTypeMemory (0)
12983594247671: XenPCI --> XenPci_DeviceWatchHandler
12983594247671: XenPCI     Start = f2000000, Length = 0
12983594247671: XenPCI <-- XenPci_DeviceWatchHandler
12983594247687: XenPCI     pfn[0] = 0000d445
12983594247687: XenPCI     New Start = 000000000d445000, Length = 4096
12983594247687: XenPCI     CmResourceTypeMemory (1)
12983594247687: XenPCI     Start = f2000001, Length = 0
12983594247687: XenPCI <-- XenPciPdo_EvtDeviceWdmIrpPreprocess_START_DEVICE
12983594247687: XenPCI --> XenPciPdo_EvtDevicePrepareHardware
12983594247687: XenPCI <-- XenPciPdo_EvtDevicePrepareHardware
12983594247687: XenPCI --> XenPciPdo_EvtDeviceD0Entry
12983594247687: XenPCI     path = device/vscsi/2
12983594247687: XenPCI     WdfPowerDeviceD3Final
12983594247687: XenPCI --> XenPci_GetBackendAndAddWatch
12983594247687: XenPCI <-- XenPci_GetBackendAndAddWatch
12983594247687: XenPCI --> XenPci_UpdateBackendState
12983594247687: XenPCI --> XenConfig_InitConfigPage
12983594247687: XenPCI     Backend State Changed to InitWait
12983594247687: XenPCI     fdo_driver_object = FFFFFA80025B9E70
12983594247687: XenPCI <-- XenPci_UpdateBackendState
12983594247687: XenPCI     fdo_driver_extension = FFFFFA8001869010
12983594247703: XenPCI <-- XenConfig_InitConfigPage
12983594247703: XenPCI --> XenPci_XenConfigDeviceSpecifyBuffers
12983594247703: XenPCI     XEN_INIT_TYPE_RING - ring-ref = FFFFFA8002AB9000
12983594247703: XenPCI     XEN_INIT_TYPE_RING - ring-ref = 16383
12983594247703: XenPCI --> XenPci_DeviceWatchHandler
12983594247703: XenPCI     XEN_INIT_TYPE_EVENT_CHANNEL - event-channel = 8
12983594247703: XenPCI <-- XenPci_DeviceWatchHandler
12983594247703: XenPCI --> EvtChn_BindIrq
12983594247703: XenPCI --> XenPci_DeviceWatchHandler
12983594247703: XenPCI <-- EvtChn_BindIrq
12983594247703: XenPCI <-- XenPci_DeviceWatchHandler
12983594247703: XenPCI --> XenPci_ChangeFrontendStateMap
12983594247703: XenPCI --> XenPci_ChangeFrontendState
12983594247703: XenPCI --> XenPci_DeviceWatchHandler
12983594247703: XenPCI <-- XenPci_DeviceWatchHandler
12983594247703: XenPCI --> XenPci_UpdateBackendState
12983594247718: XenPCI     Backend State Changed to Connected
12983594247718: XenPCI <-- XenPci_UpdateBackendState
12983594247718: XenPCI <-- XenPci_ChangeFrontendState
12983594247718: XenPCI <-- XenPci_ChangeFrontendStateMap
12983594247718: XenPCI --> XenPci_ChangeFrontendStateMap
12983594247718: XenPCI --> XenPci_ChangeFrontendState
12983594247734: XenPCI <-- XenPci_ChangeFrontendState
12983594247734: XenPCI --> XenPci_DeviceWatchHandler
12983594247734: XenPCI <-- XenPci_ChangeFrontendStateMap
12983594247734: XenPCI <-- XenPci_DeviceWatchHandler
12983594247734: XenPCI <-- XenPci_XenConfigDeviceSpecifyBuffers
12983594247734: XenPCI <-- XenPciPdo_EvtDeviceD0Entry
12983594247734: XenSCSI --> XenScsi_HwScsiFindAdapter
12983594247734: XenSCSI     IRQL = 0
12983594247734: XenSCSI     BusInterruptLevel = 28
12983594247734: XenSCSI     BusInterruptVector = 01c
12983594247734: XenSCSI     RangeStart = 0d445000, RangeLength = 00001000
12983594247734: XenSCSI     XEN_INIT_TYPE_13
12983594247734: XenSCSI     XEN_INIT_TYPE_VECTORS
12983594247734: XenSCSI     XEN_INIT_TYPE_11
12983594247734: XenSCSI     XEN_INIT_TYPE_RING - ring-ref = FFFFFA8002AB9000
12983594247734: XenSCSI     XEN_INIT_TYPE_EVENT_CHANNEL - event-channel = 8
12983594247750: XenSCSI     XEN_INIT_TYPE_GRANT_ENTRIES - 144
12983594247750: XenSCSI     Dma64BitAddresses supported
12983594247750: XenPCI --> XenPci_XenBus_AddWatch

12983594247750: XenPCI XenPci_XenBus_AddWatch -/local/domain/0/backend/vscsi/3/2/vscsi-devs = NULL

12983594247750: XenSCSI --> XenScsi_DevWatch
12983594247750: XenPCI <-- XenPci_XenBus_AddWatch
12983594247750: XenSCSI     Waiting for pause...
12983594247750: XenSCSI <-- XenScsi_HwScsiFindAdapter
12983594247750: XenSCSI --> XenScsi_HwScsiInitialize
12983594247750: XenSCSI <-- XenScsi_HwScsiInitialize
12983594247750: XenSCSI --> XenScsi_HwScsiAdapterControl
12983594247750: XenSCSI     IRQL = 0
12983594247750: XenSCSI     ScsiQuerySupportedControlTypes (Max = 5)
12983594247750: XenSCSI <-- XenScsi_HwScsiAdapterControl
12983594247750: XenSCSI     Busy
12983594247859: XenSCSI     Waiting for pause...
12983594247968: XenSCSI     Waiting for pause...
12983594248078: XenSCSI     Waiting for pause...
12983594248187: XenSCSI     Waiting for pause...
12983594248296: XenSCSI     Waiting for pause...
12983594248406: XenSCSI     Waiting for pause...
12983594248515: XenSCSI     Waiting for pause...
12983594248625: XenSCSI     Waiting for pause...
12983594248734: XenSCSI     Waiting for pause...
12983594248843: XenSCSI     Waiting for pause...



It worked, when correcting the source code of GPLPV as follows.


--- a/xenscsi/xenscsi.c
+++ b/xenscsi/xenscsi.c
@@ -278,17 +278,27 @@
    /* this can only be called from a watch and so is always serialised */
    FUNCTION_ENTER();

-  #if DBG
-  oldpause =
-  #endif

- InterlockedExchange(&xsdd->shared_paused,SHARED_PAUSED_PASSIVE_PAUSED);

-  ASSERT(oldpause == SHARED_PAUSED_SCSIPORT_UNPAUSED);
-

- while (InterlockedCompareExchange(&xsdd->shared_paused,SHARED_PAUSED_SCSIPORT_PAUSED, SHARED_PAUSED_SCSIPORT_PAUSED) !=SHARED_PAUSED_SCSIPORT_PAUSED)

+  while (1)
    {
-    KdPrint((__DRIVER_NAME "     Waiting for pause...\n"));
-    wait_time.QuadPart = -100 * 1000 * 10; /* 100ms */
-    KeDelayExecutionThread(KernelMode, FALSE, &wait_time);

+ if (InterlockedCompareExchange(&xsdd->shared_paused,SHARED_PAUSED_SCSIPORT_UNPAUSED, SHARED_PAUSED_SCSIPORT_UNPAUSED) ==SHARED_PAUSED_SCSIPORT_UNPAUSED)

+    {
+      #if DBG
+      oldpause =
+      #endif

+ InterlockedExchange(&xsdd->shared_paused,SHARED_PAUSED_PASSIVE_PAUSED);

+      ASSERT(oldpause == SHARED_PAUSED_SCSIPORT_UNPAUSED);
+    }
+

+ if (InterlockedCompareExchange(&xsdd->shared_paused,SHARED_PAUSED_SCSIPORT_PAUSED, SHARED_PAUSED_SCSIPORT_PAUSED) !=SHARED_PAUSED_SCSIPORT_PAUSED)

+    {
+      KdPrint((__DRIVER_NAME "     Waiting for pause...\n"));
+      wait_time.QuadPart = -100 * 1000 * 10; /* 100ms */
+      KeDelayExecutionThread(KernelMode, FALSE, &wait_time);
+    }
+    else
+    {
+      break;
+    }
    }

    KdPrint((__DRIVER_NAME "     Watch triggered on %s\n", path));


Thanks,
Kazuto Yoshino.


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