path: root/drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c

/*
 * Copyright (c) 2012-2016 VMware, Inc.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of EITHER the GNU General Public License
 * version 2 as published by the Free Software Foundation or the BSD
 * 2-Clause License. This program is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License version 2 for more details at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program available in the file COPYING in the main
 * directory of this source tree.
 *
 * The BSD 2-Clause License
 *
 *     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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/errno.h>
#include <linux/inetdevice.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <net/addrconf.h>

#include "pvrdma.h"

#define DRV_NAME	"vmw_pvrdma"
#define DRV_VERSION	"1.0.1.0-k"

static DEFINE_MUTEX(pvrdma_device_list_lock);
static LIST_HEAD(pvrdma_device_list);
static struct workqueue_struct *event_wq;

static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context);
static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context);

static ssize_t hca_type_show(struct device *device,
			     struct device_attribute *attr, char *buf)
{
	return sysfs_emit(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
}
static DEVICE_ATTR_RO(hca_type);

static ssize_t hw_rev_show(struct device *device,
			   struct device_attribute *attr, char *buf)
{
	return sysfs_emit(buf, "%d\n", PVRDMA_REV_ID);
}
static DEVICE_ATTR_RO(hw_rev);

static ssize_t board_id_show(struct device *device,
			     struct device_attribute *attr, char *buf)
{
	return sysfs_emit(buf, "%d\n", PVRDMA_BOARD_ID);
}
static DEVICE_ATTR_RO(board_id);

static struct attribute *pvrdma_class_attributes[] = {
	&dev_attr_hw_rev.attr,
	&dev_attr_hca_type.attr,
	&dev_attr_board_id.attr,
	NULL,
};

static const struct attribute_group pvrdma_attr_group = {
	.attrs = pvrdma_class_attributes,
};

static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
{
	struct pvrdma_dev *dev =
		container_of(device, struct pvrdma_dev, ib_dev);
	snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
		 (int) (dev->dsr->caps.fw_ver >> 32),
		 (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
		 (int) dev->dsr->caps.fw_ver & 0xffff);
}

static int pvrdma_init_device(struct pvrdma_dev *dev)
{
	/*  Initialize some device related stuff */
	spin_lock_init(&dev->cmd_lock);
	sema_init(&dev->cmd_sema, 1);
	atomic_set(&dev->num_qps, 0);
	atomic_set(&dev->num_srqs, 0);
	atomic_set(&dev->num_cqs, 0);
	atomic_set(&dev->num_pds, 0);
	atomic_set(&dev->num_ahs, 0);

	return 0;
}

static int pvrdma_port_immutable(struct ib_device *ibdev, u32 port_num,
				 struct ib_port_immutable *immutable)
{
	struct pvrdma_dev *dev = to_vdev(ibdev);
	struct ib_port_attr attr;
	int err;

	if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1)
		immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE;
	else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2)
		immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;

	err = ib_query_port(ibdev, port_num, &attr);
	if (err)
		return err;

	immutable->pkey_tbl_len = attr.pkey_tbl_len;
	immutable