[deliverable/linux.git] / drivers / net / ethernet / mellanox / mlx4 / intf.c

/*
 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
 * 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/slab.h>
#include <linux/export.h>
#include <linux/errno.h>
#include <net/devlink.h>

#include "mlx4.h"

struct mlx4_device_context {
	struct list_head	list;
	struct list_head	bond_list;
	struct mlx4_interface  *intf;
	void		       *context;
};

static LIST_HEAD(intf_list);
static LIST_HEAD(dev_list);
static DEFINE_MUTEX(intf_mutex);

static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
{
	struct mlx4_device_context *dev_ctx;

	dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);
	if (!dev_ctx)
		return;

	dev_ctx->intf    = intf;
	dev_ctx->context = intf->add(&priv->dev);

	if (dev_ctx->context) {
		spin_lock_irq(&priv->ctx_lock);
		list_add_tail(&dev_ctx->list, &priv->ctx_list);
		spin_unlock_irq(&priv->ctx_lock);
		if (intf->activate)
			intf->activate(&priv->dev, dev_ctx->context);
	} else
		kfree(dev_ctx);

}

static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
{
	struct mlx4_device_context *dev_ctx;

	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
		if (dev_ctx->intf == intf) {
			spin_lock_irq(&priv->ctx_lock);
			list_del(&dev_ctx->list);
			spin_unlock_irq(&priv->ctx_lock);

			intf->remove(&priv->dev, dev_ctx->context);
			kfree(dev_ctx);
			return;
		}
}

int mlx4_register_interface(struct mlx4_interface *intf)
{
	struct mlx4_priv *priv;

	if (!intf->add || !intf->remove)
		return -EINVAL;

	mutex_lock(&intf_mutex);

	list_add_tail(&intf->list, &intf_list);
	list_for_each_entry(priv, &dev_list, dev_list) {
		if (mlx4_is_mfunc(&priv->dev) && (intf->flags & MLX4_INTFF_BONDING)) {
			mlx4_dbg(&priv->dev,
				 "SRIOV, disabling HA mode for intf proto %d\n", intf->protocol);
			intf->flags &= ~MLX4_INTFF_BONDING;
		}
		mlx4_add_device(intf, priv);
	}

	mutex_unlock(&intf_mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(mlx4_register_interface);

void mlx4_unregister_interface(struct mlx4_interface *intf)
{
	struct mlx4_priv *priv;

	mutex_lock(&intf_mutex);

	list_for_each_entry(priv, &dev_list, dev_list)
		mlx4_remove_device(intf, priv);

	list_del(&intf->list);

	mutex_unlock(&intf_mutex);
}
EXPORT_SYMBOL_GPL(mlx4_unregister_interface);

int mlx4_do_bond(struct mlx4_dev *dev, bool enable)
{
	struct mlx4_priv *priv = mlx4_priv(dev);
	struct mlx4_device_context *dev_ctx = NULL, *temp_dev_ctx;
	unsigned long flags;
	int ret;
	LIST_HEAD(bond_list);

	if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP))
		return -ENOTSUPP;

	ret = mlx4_disable_rx_port_check(dev, enable);
	if (ret) {
		mlx4_err(dev, "Fail to %s rx port check\n",
			 enable ? "enable" : "disable");
		return ret;
	}
	if (enable) {
		dev->flags |= MLX4_FLAG_BONDED;
	} else {
		ret = mlx4_virt2phy_port_map(dev, 1, 2);
		if (ret) {
			mlx4_err(dev, "Fail to reset port map\n");
			return ret;
		}
		dev->flags &= ~MLX4_FLAG_BONDED;
	}

	spin_lock_irqsave(&priv->ctx_lock, flags);
	list_for_each_entry_safe(dev_ctx, temp_dev_ctx, &priv->ctx_list, list) {
		if (dev_ctx->intf->flags & MLX4_INTFF_BONDING) {
			list_add_tail(&dev_ctx->bond_list, &bond_list);
			list_del(&dev_ctx->list);
		}
	}
	spin_unlock_irqrestore(&priv->ctx_lock, flags);

	list_for_each_entry(dev_ctx, &bond_list, bond_list) {
		dev_ctx->intf->remove(dev, dev_ctx->context);
		dev_ctx->context =  dev_ctx->intf->add(dev);

		spin_lock_irqsave(&priv->ctx_lock, flags);
		list_add_tail(&dev_ctx->list, &priv->ctx_list);
		spin_unlock_irqrestore(&priv->ctx_lock, flags);

		mlx4_dbg(dev, "Inrerface for protocol %d restarted with when bonded mode is %s\n",
			 dev_ctx->intf->protocol, enable ?
			 "enabled" : "disabled");
	}
	return 0;
}

void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
			 unsigned long param)
{
	struct mlx4_priv *priv = mlx4_priv(dev);
	struct mlx4_device_context *dev_ctx;
	unsigned long flags;

	spin_lock_irqsave(&priv->ctx_lock, flags);

	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
		if (dev_ctx->intf->event)
			dev_ctx->intf->event(dev, dev_ctx->context, type, param);

	spin_unlock_irqrestore(&priv->ctx_lock, flags);
}

int mlx4_register_device(struct mlx4_dev *dev)
{
	struct mlx4_priv *priv = mlx4_priv(dev);
	struct mlx4_interface *intf;

	mutex_lock(&intf_mutex);

	dev->persist->interface_state |= MLX4_INTERFACE_STATE_UP;
	list_add_tail(&priv->dev_list, &dev_list);
	list_for_each_entry(intf, &intf_list, list)
		mlx4_add_device(intf, priv);

	mutex_unlock(&intf_mutex);
	mlx4_start_catas_poll(dev);

	return 0;
}

void mlx4_unregister_device(struct mlx4_dev *dev)
{
	struct mlx4_priv *priv = mlx4_priv(dev);
	struct mlx4_interface *intf;

	mlx4_stop_catas_poll(dev);
	mutex_lock(&intf_mutex);

	list_for_each_entry(intf, &intf_list, list)
		mlx4_remove_device(intf, priv);

	list_del(&priv->dev_list);
	dev->persist->interface_state &= ~MLX4_INTERFACE_STATE_UP;

	mutex_unlock(&intf_mutex);
}

void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port)
{
	struct mlx4_priv *priv = mlx4_priv(dev);
	struct mlx4_device_context *dev_ctx;
	unsigned long flags;
	void *result = NULL;

	spin_lock_irqsave(&priv->ctx_lock, flags);

	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
		if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) {
			result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port);
			break;
		}

	spin_unlock_irqrestore(&priv->ctx_lock, flags);

	return result;
}
EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev);

struct devlink_port *mlx4_get_devlink_port(struct mlx4_dev *dev, int port)
{
	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];

	return &info->devlink_port;
}
EXPORT_SYMBOL_GPL(mlx4_get_devlink_port);
Commit	Line	Data
225c7b1f RD	1	/*
225c7b1f RD	2	* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
51a379d0	3	* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
225c7b1f RD	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
	32	*/
	33
5a0e3ad6	34	#include <linux/slab.h>
ee40fa06	35	#include <linux/export.h>
53f33ae2	36	#include <linux/errno.h>
09d4d087	37	#include <net/devlink.h>
5a0e3ad6	38
225c7b1f RD	39	#include "mlx4.h"
	40
	41	struct mlx4_device_context {
	42	struct list_head list;
53f33ae2	43	struct list_head bond_list;
225c7b1f RD	44	struct mlx4_interface *intf;
	45	void *context;
	46	};
	47
	48	static LIST_HEAD(intf_list);
	49	static LIST_HEAD(dev_list);
	50	static DEFINE_MUTEX(intf_mutex);
	51
	52	static void mlx4_add_device(struct mlx4_interface intf, struct mlx4_priv priv)
	53	{
	54	struct mlx4_device_context *dev_ctx;
	55
	56	dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);
	57	if (!dev_ctx)
	58	return;
	59
	60	dev_ctx->intf = intf;
	61	dev_ctx->context = intf->add(&priv->dev);
	62
	63	if (dev_ctx->context) {
	64	spin_lock_irq(&priv->ctx_lock);
	65	list_add_tail(&dev_ctx->list, &priv->ctx_list);
	66	spin_unlock_irq(&priv->ctx_lock);
79857cd3 MS	67	if (intf->activate)
79857cd3 MS	68	intf->activate(&priv->dev, dev_ctx->context);
225c7b1f RD	69	} else
225c7b1f RD	70	kfree(dev_ctx);
79857cd3	71
225c7b1f RD	72	}
	73
	74	static void mlx4_remove_device(struct mlx4_interface intf, struct mlx4_priv priv)
	75	{
	76	struct mlx4_device_context *dev_ctx;
	77
	78	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
	79	if (dev_ctx->intf == intf) {
	80	spin_lock_irq(&priv->ctx_lock);
	81	list_del(&dev_ctx->list);
	82	spin_unlock_irq(&priv->ctx_lock);
	83
	84	intf->remove(&priv->dev, dev_ctx->context);
	85	kfree(dev_ctx);
	86	return;
	87	}
	88	}
	89
	90	int mlx4_register_interface(struct mlx4_interface *intf)
	91	{
	92	struct mlx4_priv *priv;
	93
	94	if (!intf->add \|\| !intf->remove)
	95	return -EINVAL;
	96
	97	mutex_lock(&intf_mutex);
	98
	99	list_add_tail(&intf->list, &intf_list);
7254acff OG	100	list_for_each_entry(priv, &dev_list, dev_list) {
	101	if (mlx4_is_mfunc(&priv->dev) && (intf->flags & MLX4_INTFF_BONDING)) {
	102	mlx4_dbg(&priv->dev,
	103	"SRIOV, disabling HA mode for intf proto %d\n", intf->protocol);
	104	intf->flags &= ~MLX4_INTFF_BONDING;
	105	}
225c7b1f	106	mlx4_add_device(intf, priv);
7254acff	107	}
225c7b1f RD	108
	109	mutex_unlock(&intf_mutex);
	110
	111	return 0;
	112	}
	113	EXPORT_SYMBOL_GPL(mlx4_register_interface);
	114
	115	void mlx4_unregister_interface(struct mlx4_interface *intf)
	116	{
	117	struct mlx4_priv *priv;
	118
	119	mutex_lock(&intf_mutex);
	120
	121	list_for_each_entry(priv, &dev_list, dev_list)
	122	mlx4_remove_device(intf, priv);
	123
	124	list_del(&intf->list);
	125
	126	mutex_unlock(&intf_mutex);
	127	}
	128	EXPORT_SYMBOL_GPL(mlx4_unregister_interface);
	129
53f33ae2 MS	130	int mlx4_do_bond(struct mlx4_dev *dev, bool enable)
	131	{
	132	struct mlx4_priv *priv = mlx4_priv(dev);
	133	struct mlx4_device_context dev_ctx = NULL, temp_dev_ctx;
	134	unsigned long flags;
	135	int ret;
	136	LIST_HEAD(bond_list);
	137
	138	if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP))
	139	return -ENOTSUPP;
	140
	141	ret = mlx4_disable_rx_port_check(dev, enable);
	142	if (ret) {
	143	mlx4_err(dev, "Fail to %s rx port check\n",
	144	enable ? "enable" : "disable");
	145	return ret;
	146	}
	147	if (enable) {
	148	dev->flags \|= MLX4_FLAG_BONDED;
	149	} else {
5d4de16c	150	ret = mlx4_virt2phy_port_map(dev, 1, 2);
53f33ae2 MS	151	if (ret) {
	152	mlx4_err(dev, "Fail to reset port map\n");
	153	return ret;
	154	}
	155	dev->flags &= ~MLX4_FLAG_BONDED;
	156	}
	157
	158	spin_lock_irqsave(&priv->ctx_lock, flags);
	159	list_for_each_entry_safe(dev_ctx, temp_dev_ctx, &priv->ctx_list, list) {
	160	if (dev_ctx->intf->flags & MLX4_INTFF_BONDING) {
	161	list_add_tail(&dev_ctx->bond_list, &bond_list);
	162	list_del(&dev_ctx->list);
	163	}
	164	}
	165	spin_unlock_irqrestore(&priv->ctx_lock, flags);
	166
	167	list_for_each_entry(dev_ctx, &bond_list, bond_list) {
	168	dev_ctx->intf->remove(dev, dev_ctx->context);
	169	dev_ctx->context = dev_ctx->intf->add(dev);
	170
	171	spin_lock_irqsave(&priv->ctx_lock, flags);
	172	list_add_tail(&dev_ctx->list, &priv->ctx_list);
	173	spin_unlock_irqrestore(&priv->ctx_lock, flags);
	174
	175	mlx4_dbg(dev, "Inrerface for protocol %d restarted with when bonded mode is %s\n",
	176	dev_ctx->intf->protocol, enable ?
	177	"enabled" : "disabled");
	178	}
	179	return 0;
	180	}
	181
00f5ce99 JM	182	void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
00f5ce99 JM	183	unsigned long param)
225c7b1f RD	184	{
	185	struct mlx4_priv *priv = mlx4_priv(dev);
	186	struct mlx4_device_context *dev_ctx;
	187	unsigned long flags;
	188
	189	spin_lock_irqsave(&priv->ctx_lock, flags);
	190
	191	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
	192	if (dev_ctx->intf->event)
00f5ce99	193	dev_ctx->intf->event(dev, dev_ctx->context, type, param);
225c7b1f RD	194
	195	spin_unlock_irqrestore(&priv->ctx_lock, flags);
	196	}
	197
	198	int mlx4_register_device(struct mlx4_dev *dev)
	199	{
	200	struct mlx4_priv *priv = mlx4_priv(dev);
	201	struct mlx4_interface *intf;
	202
225c7b1f RD	203	mutex_lock(&intf_mutex);
225c7b1f RD	204
c69453e2	205	dev->persist->interface_state \|= MLX4_INTERFACE_STATE_UP;
225c7b1f RD	206	list_add_tail(&priv->dev_list, &dev_list);
	207	list_for_each_entry(intf, &intf_list, list)
	208	mlx4_add_device(intf, priv);
	209
	210	mutex_unlock(&intf_mutex);
55ad3592	211	mlx4_start_catas_poll(dev);
225c7b1f RD	212
	213	return 0;
	214	}
	215
	216	void mlx4_unregister_device(struct mlx4_dev *dev)
	217	{
	218	struct mlx4_priv *priv = mlx4_priv(dev);
	219	struct mlx4_interface *intf;
	220
55ad3592	221	mlx4_stop_catas_poll(dev);
225c7b1f RD	222	mutex_lock(&intf_mutex);
	223
	224	list_for_each_entry(intf, &intf_list, list)
	225	mlx4_remove_device(intf, priv);
	226
	227	list_del(&priv->dev_list);
c69453e2	228	dev->persist->interface_state &= ~MLX4_INTERFACE_STATE_UP;
225c7b1f RD	229
	230	mutex_unlock(&intf_mutex);
	231	}
33c87f0a EC	232
	233	void mlx4_get_protocol_dev(struct mlx4_dev dev, enum mlx4_protocol proto, int port)
	234	{
	235	struct mlx4_priv *priv = mlx4_priv(dev);
	236	struct mlx4_device_context *dev_ctx;
	237	unsigned long flags;
	238	void *result = NULL;
	239
	240	spin_lock_irqsave(&priv->ctx_lock, flags);
	241
	242	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
	243	if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) {
	244	result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port);
	245	break;
	246	}
	247
	248	spin_unlock_irqrestore(&priv->ctx_lock, flags);
	249
	250	return result;
	251	}
	252	EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev);
09d4d087 JP	253
	254	struct devlink_port mlx4_get_devlink_port(struct mlx4_dev dev, int port)
	255	{
	256	struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
	257
	258	return &info->devlink_port;
	259	}
	260	EXPORT_SYMBOL_GPL(mlx4_get_devlink_port);