path: root/drivers/infiniband/hw/hns/hns_roce_main.c

/*
 * Copyright (c) 2016 Hisilicon Limited.
 * Copyright (c) 2007, 2008 Mellanox Technologies. 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.
 */
#include <linux/acpi.h>
#include <linux/of_platform.h>
#include <linux/module.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_cache.h>
#include "hns_roce_common.h"
#include "hns_roce_device.h"
#include <rdma/hns-abi.h>
#include "hns_roce_hem.h"

/**
 * hns_get_gid_index - Get gid index.
 * @hr_dev: pointer to structure hns_roce_dev.
 * @port:  port, value range: 0 ~ MAX
 * @gid_index:  gid_index, value range: 0 ~ MAX
 * Description:
 *    N ports shared gids, allocation method as follow:
 *		GID[0][0], GID[1][0],.....GID[N - 1][0],
 *		GID[0][0], GID[1][0],.....GID[N - 1][0],
 *		And so on
 */
int hns_get_gid_index(struct hns_roce_dev *hr_dev, u8 port, int gid_index)
{
	return gid_index * hr_dev->caps.num_ports + port;
}

static int hns_roce_set_mac(struct hns_roce_dev *hr_dev, u8 port, u8 *addr)
{
	u8 phy_port;
	u32 i = 0;

	if (!memcmp(hr_dev->dev_addr[port], addr, ETH_ALEN))
		return 0;

	for (i = 0; i < ETH_ALEN; i++)
		hr_dev->dev_addr[port][i] = addr[i];

	phy_port = hr_dev->iboe.phy_port[port];
	return hr_dev->hw->set_mac(hr_dev, phy_port, addr);
}

static int hns_roce_add_gid(const struct ib_gid_attr *attr, void **context)
{
	struct hns_roce_dev *hr_dev = to_hr_dev(attr->device);
	u8 port = attr->port_num - 1;
	int ret;

	if (port >= hr_dev->caps.num_ports)
		return -EINVAL;

	ret = hr_dev->hw->set_gid(hr_dev, port, attr->index, &attr->gid, attr);

	return ret;
}

static int hns_roce_del_gid(const struct ib_gid_attr *attr, void **context)
{
	struct hns_roce_dev *hr_dev = to_hr_dev(attr->device);
	struct ib_gid_attr zattr = { };
	u8 port = attr->port_num - 1;
	int ret;

	if (port >= hr_dev->caps.num_ports)
		return -EINVAL;

	ret = hr_dev->hw->set_gid(hr_dev, port, attr->index, &zgid, &zattr);

	return ret;
}

static int handle_en_event(struct hns_roce_dev *hr_dev, u8 port,
			   unsigned long event)
{
	struct device *dev = hr_dev->dev;
	struct net_device *netdev;
	int ret = 0;

	netdev = hr_dev->iboe.netdevs[port];
	if (!netdev) {
		dev_err(dev, "port(%d) can't find netdev\n", port);
		return -ENODEV;
	}

	switch (event) {
	case NETDEV_UP:
	case NETDEV_CHANGE:
	case NETDEV_REGISTER:
	case NETDEV_CHANGEADDR:
		ret = hns_roce_set_mac(hr_dev, port, netdev->dev_addr);
		break;
	case NETDEV_DOWN:
		/*
		 * In v1 engine, only support all ports closed together.
		 */
		break;
	default:
		dev_dbg(dev, "NETDEV event = 0x%x!\n", (u32)(event));
		break;
	}

	return ret;
}

static int hns_roce_netdev_event(struct notifier_block *self,
				 unsigned long event, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct hns_roce_ib_iboe *iboe = NULL;
	struct hns_roce_dev *hr_dev = NULL;
	u8 port = 0;
	int ret = 0;

	hr_dev = container_of(self, struct hns_roce_dev, iboe.nb);
	iboe = &hr_dev->iboe;

	for (port = 0; port < hr_dev->caps.num_ports; port++) {
		if (dev == iboe->netdevs[port]) {
			ret = handle_en_event(hr_dev, port, event);
			if (ret)
				return NOTIFY_DONE;
			break;
		}
	}

	return NOTIFY_DONE;
}

static int hns_roce_setup_mtu_mac(struct hns_roce_dev *hr_dev)
{
	int ret;
	u8 i;

	for (i = 0; i < hr_dev->caps.num_ports; i++) {
		if (hr_dev->hw->set_mtu)
			hr_dev->hw->set_mtu(hr_dev, hr_dev->iboe.phy_port[i],
					    hr_dev->caps.max_mtu);
		ret = hns_roce_set_mac(hr_dev, i,
				       hr_dev->iboe.netdevs[i]->dev_addr);
		if (ret)
			return ret;
	}

	return 0;
}

static int hns_roce_query_device(struct ib_device *ib_dev,
				 struct ib_device_attr *props,
				 struct ib_udata *uhw)
{
	struct hns_roce_dev *hr_dev = to_hr_dev(