[ofw] [PATCH] Support for I/O completion ports

[Fab Tillier]

Memory registrations in IBAL require a user-mode structure.  However, registration and deregistration operations in NetworkDirect (and WinVerbs) are defined as overlapped operations (overlapped means asynchronous).  Clients that use I/O completion ports (IOCP) expect these operations to complete to said IOCP.

Add code to allow user-mode code to register memory via the existing IBAL IOCTLs, and if that succeeds, issue a no-op IOCTL that completes the user's overlapped request to their IOCP (or whatever mechanism they are using - the I/O manager will take care of it).

Signed-off-by: Fab Tillier <ftillier at microsoft.com>

diff -up -r -X trunk\docs\dontdiff.txt -I \$Id: old\core\al\al_dev.h trunk\core\al\al_dev.h
--- old\core\al\al_dev.h        Tue Jul 01 11:17:08 2008
+++ trunk\core\al\al_dev.h      Tue Jul 01 11:23:34 2008
@@ -55,7 +55,7 @@
 #define AL_DEVICE_NAME L"\\Device\\ibal"
 #define        ALDEV_KEY               (0x3B)  /* Matches FILE_DEVICE_INFINIBAND from wdm.h */

-#define AL_IOCTL_VERSION                       (5)
+#define AL_IOCTL_VERSION                       (6)

 /* max number of devices with non-default pkey */
 #define        MAX_NUM_PKEY    16
@@ -403,6 +403,7 @@ typedef enum _al_ndi_ops
        ual_ndi_rtu_cm_ioctl_cmd,
        ual_ndi_rej_cm_ioctl_cmd,
        ual_ndi_dreq_cm_ioctl_cmd,
+    ual_ndi_noop,

        al_ndi_maxops

@@ -424,6 +425,7 @@ typedef enum _al_ndi_ops
 #define UAL_NDI_RTU_CM                 IOCTL_CODE(ALDEV_KEY, ual_ndi_rtu_cm_ioctl_cmd)
 #define UAL_NDI_REJ_CM                 IOCTL_CODE(ALDEV_KEY, ual_ndi_rej_cm_ioctl_cmd)
 #define UAL_NDI_DREQ_CM                        IOCTL_CODE(ALDEV_KEY, ual_ndi_dreq_cm_ioctl_cmd)
+#define UAL_NDI_NOOP            IOCTL_CODE(ALDEV_KEY, ual_ndi_noop)

 /*
  * Various Operation Allowable on the System Helper
diff -up -r -X trunk\docs\dontdiff.txt -I \$Id: old\core\al\kernel\al_proxy_ndi.c trunk\core\al\kernel\al_proxy_ndi.c
--- old\core\al\kernel\al_proxy_ndi.c   Mon Jun 30 14:50:58 2008
+++ trunk\core\al\kernel\al_proxy_ndi.c Tue Jul 01 11:23:34 2008
@@ -631,6 +631,9 @@ ndi_ioctl(
        case UAL_NDI_DREQ_CM:
                cl_status = __ndi_dreq_cm( p_context, h_ioctl, p_ret_bytes );
                break;
+    case UAL_NDI_NOOP:
+        cl_status = CL_SUCCESS;
+        break;
        default:
                cl_status = CL_INVALID_PARAMETER;
                break;
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