path: root/drivers/infiniband/hw/mthca/mthca_provider.c

/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2005 Cisco Systems. All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * $Id: mthca_provider.c 1397 2004-12-28 05:09:00Z roland $
 */

#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <linux/mm.h>

#include "mthca_dev.h"
#include "mthca_cmd.h"
#include "mthca_user.h"
#include "mthca_memfree.h"

static int mthca_query_device(struct ib_device *ibdev,
			      struct ib_device_attr *props)
{
	struct ib_smp *in_mad  = NULL;
	struct ib_smp *out_mad = NULL;
	int err = -ENOMEM;
	struct mthca_dev* mdev = to_mdev(ibdev);

	u8 status;

	in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
	if (!in_mad || !out_mad)
		goto out;

	memset(props, 0, sizeof *props);

	props->fw_ver              = mdev->fw_ver;

	memset(in_mad, 0, sizeof *in_mad);
	in_mad->base_version       = 1;
	in_mad->mgmt_class     	   = IB_MGMT_CLASS_SUBN_LID_ROUTED;
	in_mad->class_version  	   = 1;
	in_mad->method         	   = IB_MGMT_METHOD_GET;
	in_mad->attr_id   	   = IB_SMP_ATTR_NODE_INFO;

	err = mthca_MAD_IFC(mdev, 1, 1,
			    1, NULL, NULL, in_mad, out_mad,
			    &status);
	if (err)
		goto out;
	if (status) {
		err = -EINVAL;
		goto out;
	}

	props->device_cap_flags    = mdev->device_cap_flags;
	props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
		0xffffff;
	props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
	props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
	memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
	memcpy(&props->node_guid,      out_mad->data + 12, 8);

	props->max_mr_size         = ~0ull;
	props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
	props->max_qp_wr           = mdev->limits.max_wqes;
	props->max_sge             = mdev->limits.max_sg;
	props->max_cq              = mdev->limits.num_cqs <