From: shefty <shefty@ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86>
Date: Mon, 11 Aug 2008 16:17:04 +0000 (+0000)
Subject: mlx4: add winverbs support
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=0ab321d46fc62a9c0e3ca795ccb215d0b5fdf3d0;p=~shefty%2Frdma-win.git

mlx4: add winverbs support

Export the mlx4 channel interface via PnP query interface calls.  This allows the driver to export its channel interface to multiple drivers, such as WinVerbs.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>


git-svn-id: svn://openib.tc.cornell.edu/gen1@1477 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86
---

diff --git a/trunk/hw/mlx4/kernel/hca/drv.c b/trunk/hw/mlx4/kernel/hca/drv.c
index d8557a25..485576ba 100644
--- a/trunk/hw/mlx4/kernel/hca/drv.c
+++ b/trunk/hw/mlx4/kernel/hca/drv.c
@@ -33,6 +33,7 @@
 #include "precomp.h"
 #include <initguid.h>
 #include <wdmguid.h>
+#include <rdma\verbs.h>
 
 #if defined(EVENT_TRACING)
 #ifdef offsetof
@@ -44,6 +45,9 @@
 #define DRV_VERSION	"1.0"
 #define DRV_RELDATE	"02/01/2008"
 
+#define MLX_VERBS_MIN_VERSION		2
+#define MLX_VERBS_MAX_VERSION		2
+
 GLOBALS g;
 
 /*
@@ -1042,6 +1046,12 @@ hca_query_capabilities(
 	IN				IRP* const					p_irp, 
 		OUT			cl_irp_action_t* const		p_action );
 
+static NTSTATUS
+hca_query_interface(
+	IN				DEVICE_OBJECT* const		p_dev_obj,
+	IN				IRP* const					p_irp, 
+		OUT			cl_irp_action_t* const		p_action );
+
 static NTSTATUS
 hca_query_pnp_state(
 	IN				DEVICE_OBJECT* const		p_dev_obj,
@@ -1114,6 +1124,7 @@ __pnp_notify_ifc(
 #pragma alloc_text (PAGE, hca_cancel_remove)
 #pragma alloc_text (PAGE, hca_surprise_remove)
 #pragma alloc_text (PAGE, hca_query_capabilities)
+#pragma alloc_text (PAGE, hca_query_interface)
 #pragma alloc_text (PAGE, hca_query_pnp_state)
 #pragma alloc_text (PAGE, hca_query_bus_relations)
 #pragma alloc_text (PAGE, hca_query_removal_relations)
@@ -1772,6 +1783,8 @@ hca_start(
 	p_fdo->bus_ib_ifc_taken = TRUE;
 	p_fdo->bus_ib_ifc.p_ibdev->x.p_fdo = p_fdo;
 	
+	InitializeListHead(&p_fdo->hca.event_list);
+	KeInitializeSpinLock(&p_fdo->hca.event_list_lock);
 
 	/* get node GUID */
 	err = __get_dev_info( p_fdo, &p_fdo->hca.guid, &p_fdo->hca.hw_ver );
@@ -2048,6 +2061,101 @@ hca_query_capabilities(
 }
 
 
+static VOID
+__hca_noop( VOID *context )
+{
+	UNREFERENCED_PARAMETER(context);
+}
+
+
+static NTSTATUS
+__query_ci_ifc(
+	IN					DEVICE_OBJECT* const		p_dev_obj,
+	IN					IO_STACK_LOCATION* const	p_io_stack )
+{
+	RDMA_INTERFACE_VERBS	*p_ifc;
+	PFDO_DEVICE_DATA		p_fdo;
+	ci_interface_t			*p_hca_ifc;
+	NTSTATUS				status;
+	UINT8					version;
+
+	HCA_ENTER( HCA_DBG_PNP );
+
+	version = VerbsVersionMajor(p_io_stack->Parameters.QueryInterface.Version);
+	if( version < MLX_VERBS_MIN_VERSION || version > MLX_VERBS_MAX_VERSION )
+	{
+		status = STATUS_NOT_SUPPORTED;
+		goto exit;
+	}
+
+	if( p_io_stack->Parameters.QueryInterface.Size < sizeof(RDMA_INTERFACE_VERBS) )
+	{
+		status = STATUS_BUFFER_TOO_SMALL;
+		goto exit;
+	}
+
+	p_fdo = (PFDO_DEVICE_DATA)p_dev_obj->DeviceExtension;
+	p_hca_ifc = __alloc_hca_ifc( p_fdo );
+	if( !p_hca_ifc )
+	{
+		status = STATUS_NO_MEMORY;
+		goto exit;
+	}
+
+	p_ifc = (RDMA_INTERFACE_VERBS *) p_io_stack->Parameters.QueryInterface.Interface;
+
+	p_ifc->InterfaceHeader.Size = sizeof(RDMA_INTERFACE_VERBS);
+	p_ifc->InterfaceHeader.Version = VerbsVersion(version, 0);
+	p_ifc->InterfaceHeader.Context = p_dev_obj;
+	p_ifc->InterfaceHeader.InterfaceReference = __hca_noop;
+	p_ifc->InterfaceHeader.InterfaceDereference = __hca_noop;
+	p_ifc->Verbs = *p_hca_ifc;
+	p_ifc->Verbs.p_hca_dev = &p_fdo->hca;
+
+	ExFreePool( p_hca_ifc );
+	status = STATUS_SUCCESS;
+
+exit:
+	HCA_EXIT( HCA_DBG_PNP );
+	return status;
+}
+
+
+static NTSTATUS
+hca_query_interface(
+	IN				DEVICE_OBJECT* const		p_dev_obj,
+	IN				IRP* const					p_irp, 
+		OUT			cl_irp_action_t* const		p_action )
+{
+	NTSTATUS			status;
+	IO_STACK_LOCATION	*p_io_stack;
+
+	HCA_ENTER( HCA_DBG_PNP );
+
+#pragma warning( push, 3 )
+	PAGED_CODE();
+#pragma warning( pop )
+
+	p_io_stack = IoGetCurrentIrpStackLocation( p_irp );
+	
+	/* Compare requested GUID with our supported interface GUIDs. */
+	if( IsEqualGUID( p_io_stack->Parameters.QueryInterface.InterfaceType,
+		&GUID_RDMA_INTERFACE_VERBS ) )
+	{
+		status = __query_ci_ifc( p_dev_obj, p_io_stack );
+		*p_action = IrpComplete;
+	}
+	else
+	{
+		status = p_irp->IoStatus.Status;
+		*p_action = IrpSkip;
+	}
+
+	HCA_EXIT( HCA_DBG_PNP );
+	return status;
+}
+
+
 static NTSTATUS
 hca_query_pnp_state(
 	IN				DEVICE_OBJECT* const		p_dev_obj,
@@ -2555,7 +2663,7 @@ hca_init_vfptr( void )
 	vfptrHcaPnp.pfn_query_resources = cl_irp_ignore;
 	vfptrHcaPnp.pfn_query_res_req = cl_irp_ignore;
 	vfptrHcaPnp.pfn_query_bus_info = cl_irp_ignore;
-	vfptrHcaPnp.pfn_query_interface = cl_irp_ignore;
+	vfptrHcaPnp.pfn_query_interface = hca_query_interface;
 	vfptrHcaPnp.pfn_read_config = cl_irp_ignore;
 	vfptrHcaPnp.pfn_write_config = cl_irp_ignore;
 	vfptrHcaPnp.pfn_eject = cl_irp_ignore;