[linux-2.6-block.git] / drivers / net / ethernet / mellanox / mlx5 / core / dev.c

/*
 * Copyright (c) 2013-2015, 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/mlx5/driver.h>
#include "mlx5_core.h"

static LIST_HEAD(intf_list);
static LIST_HEAD(mlx5_dev_list);
/* intf dev list mutex */
static DEFINE_MUTEX(mlx5_intf_mutex);

struct mlx5_device_context {
	struct list_head	list;
	struct mlx5_interface  *intf;
	void		       *context;
	unsigned long		state;
};

enum {
	MLX5_INTERFACE_ADDED,
	MLX5_INTERFACE_ATTACHED,
};


void mlx5_add_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
{
	struct mlx5_device_context *dev_ctx;
	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);

	if (!mlx5_lag_intf_add(intf, priv))
		return;

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

	dev_ctx->intf = intf;

	dev_ctx->context = intf->add(dev);
	if (dev_ctx->context) {
		set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
		if (intf->attach)
			set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);

		spin_lock_irq(&priv->ctx_lock);
		list_add_tail(&dev_ctx->list, &priv->ctx_list);
		spin_unlock_irq(&priv->ctx_lock);
	}

	if (!dev_ctx->context)
		kfree(dev_ctx);
}

static struct mlx5_device_context *mlx5_get_device(struct mlx5_interface *intf,
						   struct mlx5_priv *priv)
{
	struct mlx5_device_context *dev_ctx;

	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
		if (dev_ctx->intf == intf)
			return dev_ctx;
	return NULL;
}

void mlx5_remove_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
{
	struct mlx5_device_context *dev_ctx;
	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);

	dev_ctx = mlx5_get_device(intf, priv);
	if (!dev_ctx)
		return;

	spin_lock_irq(&priv->ctx_lock);
	list_del(&dev_ctx->list);
	spin_unlock_irq(&priv->ctx_lock);

	if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
		intf->remove(dev, dev_ctx->context);

	kfree(dev_ctx);
}

static void mlx5_attach_interface(struct mlx5_interface *intf, struct mlx5_priv *priv)
{
	struct mlx5_device_context *dev_ctx;
	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);

	dev_ctx = mlx5_get_device(intf, priv);
	if (!dev_ctx)
		return;

	if (intf->attach) {
		if (test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
			return;
		if (intf->attach(dev, dev_ctx->context))
			return;
		set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
	} else {
		if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
			return;
		dev_ctx->context = intf->add(dev);
		if (!dev_ctx->context)
			return;
		set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	}
}

void mlx5_attach_device(struct mlx5_core_dev *dev)
{
	struct mlx5_priv *priv = &dev->priv;
	struct mlx5_interface *intf;

	mutex_lock(&mlx5_intf_mutex);
	list_for_each_entry(intf, &intf_list, list)
		mlx5_attach_interface(intf, priv);
	mutex_unlock(&mlx5_intf_mutex);
}

static void mlx5_detach_interface(struct mlx5_interface *intf, struct mlx5_priv *priv)
{
	struct mlx5_device_context *dev_ctx;
	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);

	dev_ctx = mlx5_get_device(intf, priv);
	if (!dev_ctx)
		return;

	if (intf->detach) {
		if (!test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
			return;
		intf->detach(dev, dev_ctx->context);
		clear_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
	} else {
		if (!test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
			return;
		intf->remove(dev, dev_ctx->context);
		clear_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	}
}

void mlx5_detach_device(struct mlx5_core_dev *dev)
{
	struct mlx5_priv *priv = &dev->priv;
	struct mlx5_interface *intf;

	mutex_lock(&mlx5_intf_mutex);
	list_for_each_entry(intf, &intf_list, list)
		mlx5_detach_interface(intf, priv);
	mutex_unlock(&mlx5_intf_mutex);
}

bool mlx5_device_registered(struct mlx5_core_dev *dev)
{
	struct mlx5_priv *priv;
	bool found = false;

	mutex_lock(&mlx5_intf_mutex);
	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
		if (priv == &dev->priv)
			found = true;
	mutex_unlock(&mlx5_intf_mutex);

	return found;
}

int mlx5_register_device(struct mlx5_core_dev *dev)
{
	struct mlx5_priv *priv = &dev->priv;
	struct mlx5_interface *intf;

	mutex_lock(&mlx5_intf_mutex);
	list_add_tail(&priv->dev_list, &mlx5_dev_list);
	list_for_each_entry(intf, &intf_list, list)
		mlx5_add_device(intf, priv);
	mutex_unlock(&mlx5_intf_mutex);

	return 0;
}

void mlx5_unregister_device(struct mlx5_core_dev *dev)
{
	struct mlx5_priv *priv = &dev->priv;
	struct mlx5_interface *intf;

	mutex_lock(&mlx5_intf_mutex);
	list_for_each_entry_reverse(intf, &intf_list, list)
		mlx5_remove_device(intf, priv);
	list_del(&priv->dev_list);
	mutex_unlock(&mlx5_intf_mutex);
}

int mlx5_register_interface(struct mlx5_interface *intf)
{
	struct mlx5_priv *priv;

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

	mutex_lock(&mlx5_intf_mutex);
	list_add_tail(&intf->list, &intf_list);
	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
		mlx5_add_device(intf, priv);
	mutex_unlock(&mlx5_intf_mutex);

	return 0;
}
EXPORT_SYMBOL(mlx5_register_interface);

void mlx5_unregister_interface(struct mlx5_interface *intf)
{
	struct mlx5_priv *priv;

	mutex_lock(&mlx5_intf_mutex);
	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
		mlx5_remove_device(intf, priv);
	list_del(&intf->list);
	mutex_unlock(&mlx5_intf_mutex);
}
EXPORT_SYMBOL(mlx5_unregister_interface);

/* Must be called with intf_mutex held */
static bool mlx5_has_added_dev_by_protocol(struct mlx5_core_dev *mdev, int protocol)
{
	struct mlx5_device_context *dev_ctx;
	struct mlx5_interface *intf;
	bool found = false;

	list_for_each_entry(intf, &intf_list, list) {
		if (intf->protocol == protocol) {
			dev_ctx = mlx5_get_device(intf, &mdev->priv);
			if (dev_ctx && test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
				found = true;
			break;
		}
	}

	return found;
}

void mlx5_reload_interface(struct mlx5_core_dev *mdev, int protocol)
{
	mutex_lock(&mlx5_intf_mutex);
	if (mlx5_has_added_dev_by_protocol(mdev, protocol)) {
		mlx5_remove_dev_by_protocol(mdev, protocol);
		mlx5_add_dev_by_protocol(mdev, protocol);
	}
	mutex_unlock(&mlx5_intf_mutex);
}

/* Must be called with intf_mutex held */
void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
{
	struct mlx5_interface *intf;

	list_for_each_entry(intf, &intf_list, list)
		if (intf->protocol == protocol) {
			mlx5_add_device(intf, &dev->priv);
			break;
		}
}

/* Must be called with intf_mutex held */
void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
{
	struct mlx5_interface *intf;

	list_for_each_entry(intf, &intf_list, list)
		if (intf->protocol == protocol) {
			mlx5_remove_device(intf, &dev->priv);
			break;
		}
}

static u32 mlx5_gen_pci_id(struct mlx5_core_dev *dev)
{
	return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
		     (dev->pdev->bus->number << 8) |
		     PCI_SLOT(dev->pdev->devfn));
}

/* Must be called with intf_mutex held */
struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
{
	struct mlx5_core_dev *res = NULL;
	struct mlx5_core_dev *tmp_dev;
	struct mlx5_priv *priv;
	u32 pci_id;

	if (!mlx5_core_is_pf(dev))
		return NULL;

	pci_id = mlx5_gen_pci_id(dev);
	list_for_each_entry(priv, &mlx5_dev_list, dev_list) {
		tmp_dev = container_of(priv, struct mlx5_core_dev, priv);
		if (!mlx5_core_is_pf(tmp_dev))
			continue;

		if ((dev != tmp_dev) && (mlx5_gen_pci_id(tmp_dev) == pci_id)) {
			res = tmp_dev;
			break;
		}
	}

	return res;
}


void mlx5_dev_list_lock(void)
{
	mutex_lock(&mlx5_intf_mutex);
}

void mlx5_dev_list_unlock(void)
{
	mutex_unlock(&mlx5_intf_mutex);
}

int mlx5_dev_list_trylock(void)
{
	return mutex_trylock(&mlx5_intf_mutex);
}
Commit	Line	Data
f1ee87fe MHY	1	/*
	2	* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*/
	32
	33	#include <linux/mlx5/driver.h>
	34	#include "mlx5_core.h"
	35
	36	static LIST_HEAD(intf_list);
	37	static LIST_HEAD(mlx5_dev_list);
	38	/* intf dev list mutex */
	39	static DEFINE_MUTEX(mlx5_intf_mutex);
	40
	41	struct mlx5_device_context {
	42	struct list_head list;
	43	struct mlx5_interface *intf;
	44	void *context;
	45	unsigned long state;
	46	};
	47
	48	enum {
	49	MLX5_INTERFACE_ADDED,
	50	MLX5_INTERFACE_ATTACHED,
	51	};
	52
97834eba	53
f1ee87fe MHY	54	void mlx5_add_device(struct mlx5_interface intf, struct mlx5_priv priv)
	55	{
	56	struct mlx5_device_context *dev_ctx;
	57	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	58
	59	if (!mlx5_lag_intf_add(intf, priv))
	60	return;
	61
	62	dev_ctx = kzalloc(sizeof(*dev_ctx), GFP_KERNEL);
	63	if (!dev_ctx)
	64	return;
	65
	66	dev_ctx->intf = intf;
97834eba	67
f1ee87fe	68	dev_ctx->context = intf->add(dev);
f1ee87fe	69	if (dev_ctx->context) {
47bc94b8 HN	70	set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	71	if (intf->attach)
	72	set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
	73
f1ee87fe MHY	74	spin_lock_irq(&priv->ctx_lock);
	75	list_add_tail(&dev_ctx->list, &priv->ctx_list);
	76	spin_unlock_irq(&priv->ctx_lock);
f1ee87fe	77	}
4ca637a2	78
4ca637a2 HN	79	if (!dev_ctx->context)
4ca637a2 HN	80	kfree(dev_ctx);
f1ee87fe MHY	81	}
	82
	83	static struct mlx5_device_context mlx5_get_device(struct mlx5_interface intf,
	84	struct mlx5_priv *priv)
	85	{
	86	struct mlx5_device_context *dev_ctx;
	87
	88	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
	89	if (dev_ctx->intf == intf)
	90	return dev_ctx;
	91	return NULL;
	92	}
	93
	94	void mlx5_remove_device(struct mlx5_interface intf, struct mlx5_priv priv)
	95	{
	96	struct mlx5_device_context *dev_ctx;
	97	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	98
	99	dev_ctx = mlx5_get_device(intf, priv);
	100	if (!dev_ctx)
	101	return;
	102
	103	spin_lock_irq(&priv->ctx_lock);
	104	list_del(&dev_ctx->list);
	105	spin_unlock_irq(&priv->ctx_lock);
	106
	107	if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
	108	intf->remove(dev, dev_ctx->context);
	109
	110	kfree(dev_ctx);
	111	}
	112
	113	static void mlx5_attach_interface(struct mlx5_interface intf, struct mlx5_priv priv)
	114	{
	115	struct mlx5_device_context *dev_ctx;
	116	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	117
	118	dev_ctx = mlx5_get_device(intf, priv);
	119	if (!dev_ctx)
	120	return;
	121
	122	if (intf->attach) {
	123	if (test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
02039fb6	124	return;
47bc94b8	125	if (intf->attach(dev, dev_ctx->context))
02039fb6	126	return;
f1ee87fe MHY	127	set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
	128	} else {
	129	if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
02039fb6	130	return;
f1ee87fe	131	dev_ctx->context = intf->add(dev);
47bc94b8	132	if (!dev_ctx->context)
02039fb6	133	return;
f1ee87fe MHY	134	set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	135	}
	136	}
	137
	138	void mlx5_attach_device(struct mlx5_core_dev *dev)
	139	{
	140	struct mlx5_priv *priv = &dev->priv;
	141	struct mlx5_interface *intf;
	142
	143	mutex_lock(&mlx5_intf_mutex);
	144	list_for_each_entry(intf, &intf_list, list)
	145	mlx5_attach_interface(intf, priv);
	146	mutex_unlock(&mlx5_intf_mutex);
	147	}
	148
	149	static void mlx5_detach_interface(struct mlx5_interface intf, struct mlx5_priv priv)
	150	{
	151	struct mlx5_device_context *dev_ctx;
	152	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	153
	154	dev_ctx = mlx5_get_device(intf, priv);
	155	if (!dev_ctx)
	156	return;
	157
	158	if (intf->detach) {
	159	if (!test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
	160	return;
	161	intf->detach(dev, dev_ctx->context);
	162	clear_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
	163	} else {
	164	if (!test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
	165	return;
	166	intf->remove(dev, dev_ctx->context);
	167	clear_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	168	}
	169	}
	170
	171	void mlx5_detach_device(struct mlx5_core_dev *dev)
	172	{
	173	struct mlx5_priv *priv = &dev->priv;
	174	struct mlx5_interface *intf;
	175
	176	mutex_lock(&mlx5_intf_mutex);
	177	list_for_each_entry(intf, &intf_list, list)
	178	mlx5_detach_interface(intf, priv);
	179	mutex_unlock(&mlx5_intf_mutex);
	180	}
	181
	182	bool mlx5_device_registered(struct mlx5_core_dev *dev)
	183	{
	184	struct mlx5_priv *priv;
	185	bool found = false;
	186
	187	mutex_lock(&mlx5_intf_mutex);
	188	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
	189	if (priv == &dev->priv)
	190	found = true;
	191	mutex_unlock(&mlx5_intf_mutex);
	192
	193	return found;
	194	}
	195
	196	int mlx5_register_device(struct mlx5_core_dev *dev)
	197	{
198	struct mlx5_priv *priv = &dev->priv;
199	struct mlx5_interface *intf;
200
201	mutex_lock(&mlx5_intf_mutex);
202	list_add_tail(&priv->dev_list, &mlx5_dev_list);
203	list_for_each_entry(intf, &intf_list, list)
204	mlx5_add_device(intf, priv);
205	mutex_unlock(&mlx5_intf_mutex);
206
207	return 0;
208	}
209
210	void mlx5_unregister_device(struct mlx5_core_dev *dev)
211	{
212	struct mlx5_priv *priv = &dev->priv;
213	struct mlx5_interface *intf;
214
215	mutex_lock(&mlx5_intf_mutex);
08aa5e7d	216	list_for_each_entry_reverse(intf, &intf_list, list)
f1ee87fe MHY	217	mlx5_remove_device(intf, priv);
	218	list_del(&priv->dev_list);
	219	mutex_unlock(&mlx5_intf_mutex);
	220	}
	221
	222	int mlx5_register_interface(struct mlx5_interface *intf)
	223	{
	224	struct mlx5_priv *priv;
	225
	226	if (!intf->add \|\| !intf->remove)
	227	return -EINVAL;
	228
	229	mutex_lock(&mlx5_intf_mutex);
	230	list_add_tail(&intf->list, &intf_list);
	231	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
	232	mlx5_add_device(intf, priv);
	233	mutex_unlock(&mlx5_intf_mutex);
	234
	235	return 0;
	236	}
	237	EXPORT_SYMBOL(mlx5_register_interface);
	238
	239	void mlx5_unregister_interface(struct mlx5_interface *intf)
	240	{
	241	struct mlx5_priv *priv;
	242
	243	mutex_lock(&mlx5_intf_mutex);
	244	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
	245	mlx5_remove_device(intf, priv);
	246	list_del(&intf->list);
	247	mutex_unlock(&mlx5_intf_mutex);
	248	}
	249	EXPORT_SYMBOL(mlx5_unregister_interface);
	250
dd80857b AH	251	/* Must be called with intf_mutex held */
	252	static bool mlx5_has_added_dev_by_protocol(struct mlx5_core_dev *mdev, int protocol)
	253	{
	254	struct mlx5_device_context *dev_ctx;
	255	struct mlx5_interface *intf;
	256	bool found = false;
	257
	258	list_for_each_entry(intf, &intf_list, list) {
	259	if (intf->protocol == protocol) {
	260	dev_ctx = mlx5_get_device(intf, &mdev->priv);
	261	if (dev_ctx && test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
	262	found = true;
	263	break;
	264	}
	265	}
	266
	267	return found;
	268	}
	269
c5447c70 MB	270	void mlx5_reload_interface(struct mlx5_core_dev *mdev, int protocol)
	271	{
	272	mutex_lock(&mlx5_intf_mutex);
dd80857b AH	273	if (mlx5_has_added_dev_by_protocol(mdev, protocol)) {
	274	mlx5_remove_dev_by_protocol(mdev, protocol);
	275	mlx5_add_dev_by_protocol(mdev, protocol);
	276	}
c5447c70 MB	277	mutex_unlock(&mlx5_intf_mutex);
	278	}
	279
f1ee87fe MHY	280	/* Must be called with intf_mutex held */
	281	void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
	282	{
	283	struct mlx5_interface *intf;
	284
	285	list_for_each_entry(intf, &intf_list, list)
	286	if (intf->protocol == protocol) {
	287	mlx5_add_device(intf, &dev->priv);
	288	break;
	289	}
	290	}
	291
	292	/* Must be called with intf_mutex held */
	293	void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
	294	{
	295	struct mlx5_interface *intf;
	296
	297	list_for_each_entry(intf, &intf_list, list)
	298	if (intf->protocol == protocol) {
	299	mlx5_remove_device(intf, &dev->priv);
	300	break;
	301	}
	302	}
	303
df7ddb23	304	static u32 mlx5_gen_pci_id(struct mlx5_core_dev *dev)
f1ee87fe	305	{
df7ddb23 DJ	306	return (u32)((pci_domain_nr(dev->pdev->bus) << 16) \|
df7ddb23 DJ	307	(dev->pdev->bus->number << 8) \|
f1ee87fe MHY	308	PCI_SLOT(dev->pdev->devfn));
	309	}
	310
	311	/* Must be called with intf_mutex held */
	312	struct mlx5_core_dev mlx5_get_next_phys_dev(struct mlx5_core_dev dev)
	313	{
f1ee87fe MHY	314	struct mlx5_core_dev *res = NULL;
	315	struct mlx5_core_dev *tmp_dev;
	316	struct mlx5_priv *priv;
7e26dac2	317	u32 pci_id;
f1ee87fe	318
7e26dac2 PP	319	if (!mlx5_core_is_pf(dev))
	320	return NULL;
	321
	322	pci_id = mlx5_gen_pci_id(dev);
f1ee87fe MHY	323	list_for_each_entry(priv, &mlx5_dev_list, dev_list) {
f1ee87fe MHY	324	tmp_dev = container_of(priv, struct mlx5_core_dev, priv);
7e26dac2 PP	325	if (!mlx5_core_is_pf(tmp_dev))
	326	continue;
	327
f1ee87fe MHY	328	if ((dev != tmp_dev) && (mlx5_gen_pci_id(tmp_dev) == pci_id)) {
	329	res = tmp_dev;
	330	break;
	331	}
	332	}
	333
	334	return res;
	335	}
	336
f1ee87fe MHY	337
	338	void mlx5_dev_list_lock(void)
	339	{
	340	mutex_lock(&mlx5_intf_mutex);
	341	}
	342
	343	void mlx5_dev_list_unlock(void)
	344	{
	345	mutex_unlock(&mlx5_intf_mutex);
	346	}
	347
	348	int mlx5_dev_list_trylock(void)
	349	{
	350	return mutex_trylock(&mlx5_intf_mutex);
	351	}