[COMMIT] [WIN-GUEST_DRIVERS] viostor driver. some steps toward better performance on XP.

[Yan Vugenfirer]

repository: C:/dev/kvm-guest-drivers-windows
branch: master
commit 4153629590c846862f095bbe3689df9e7fd70e06
Author: Yan Vugenfirer <yvuge...@redhat.com>
Date:   Wed Nov 25 13:19:13 2009 +0200

    [WIN-GUEST_DRIVERS]
    viostor driver. some steps toward better performance on XP.
    
         Signed-off-by: Vadim Rozenfeld<vroze...@redhat.com>

diff --git a/viostor/virtio_stor.c b/viostor/virtio_stor.c
index d363909..8b91e62 100644
--- a/viostor/virtio_stor.c
+++ b/viostor/virtio_stor.c
@@ -1131,6 +1131,9 @@ CompleteDPC(
     }
 #endif
     CompleteSRB(DeviceExtension, Srb);
+#ifndef USE_STORPORT
+    --adaptExt->requests;
+#endif
 }
 
 #ifdef USE_STORPORT
diff --git a/viostor/virtio_stor.h b/viostor/virtio_stor.h
index 456fa0e..c00600c 100644
--- a/viostor/virtio_stor.h
+++ b/viostor/virtio_stor.h
@@ -105,6 +105,8 @@ typedef struct _ADAPTER_EXTENSION {
     LIST_ENTRY            complete_list;
 #ifdef USE_STORPORT
     STOR_DPC              completion_dpc;
+#else
+    ULONG                 requests;
 #endif
     BOOLEAN               has_sn;
     ULONG                 msix_vectors;
diff --git a/viostor/virtio_stor_hw_helper.c b/viostor/virtio_stor_hw_helper.c
index ed6abf7..21d27cd 100644
--- a/viostor/virtio_stor_hw_helper.c
+++ b/viostor/virtio_stor_hw_helper.c
@@ -94,9 +94,11 @@ RhelDoReadWrite(PVOID DeviceExtension,
                                       &srbExt->vbr.sg[0],
                                       srbExt->out, srbExt->in,
                                       &srbExt->vbr) == 0) {
-//FIXME
         InsertTailList(&adaptExt->list_head, &srbExt->vbr.list_entry);
         adaptExt->pci_vq_info.vq->vq_ops->kick(adaptExt->pci_vq_info.vq);
+        if(++adaptExt->requests < adaptExt->queue_depth) {
+           ScsiPortNotification(NextLuRequest, DeviceExtension, Srb->PathId, 
Srb->TargetId, Srb->Lun);
+        }
         return TRUE;
     }
     return FALSE;
--
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