[linux-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);
	set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	if (intf->attach)
		set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);

	if (dev_ctx->context) {
		spin_lock_irq(&priv->ctx_lock);
		list_add_tail(&dev_ctx->list, &priv->ctx_list);
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
		if (dev_ctx->intf->pfault) {
			if (priv->pfault) {
				mlx5_core_err(dev, "multiple page fault handlers not supported");
			} else {
				priv->pfault_ctx = dev_ctx->context;
				priv->pfault = dev_ctx->intf->pfault;
			}
		}
#endif
		spin_unlock_irq(&priv->ctx_lock);
	} else {
		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;

#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
	spin_lock_irq(&priv->ctx_lock);
	if (priv->pfault == dev_ctx->intf->pfault)
		priv->pfault = NULL;
	spin_unlock_irq(&priv->ctx_lock);

	synchronize_srcu(&priv->pfault_srcu);
#endif

	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;
		intf->attach(dev, dev_ctx->context);
		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);
		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(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);

void *mlx5_get_protocol_dev(struct mlx5_core_dev *mdev, int protocol)
{
	struct mlx5_priv *priv = &mdev->priv;
	struct mlx5_device_context *dev_ctx;
	unsigned long flags;
	void *result = NULL;

	spin_lock_irqsave(&priv->ctx_lock, flags);

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

	spin_unlock_irqrestore(&priv->ctx_lock, flags);

	return result;
}
EXPORT_SYMBOL(mlx5_get_protocol_dev);

/* 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 u16 mlx5_gen_pci_id(struct mlx5_core_dev *dev)
{
	return (u16)((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)
{
	u16 pci_id = mlx5_gen_pci_id(dev);
	struct mlx5_core_dev *res = NULL;
	struct mlx5_core_dev *tmp_dev;
	struct mlx5_priv *priv;

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

	return res;
}

void mlx5_core_event(struct mlx5_core_dev *dev, enum mlx5_dev_event event,
		     unsigned long param)
{
	struct mlx5_priv *priv = &dev->priv;
	struct mlx5_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, event, param);

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

#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
void mlx5_core_page_fault(struct mlx5_core_dev *dev,
			  struct mlx5_pagefault *pfault)
{
	struct mlx5_priv *priv = &dev->priv;
	int srcu_idx;

	srcu_idx = srcu_read_lock(&priv->pfault_srcu);
	if (priv->pfault)
		priv->pfault(dev, priv->pfault_ctx, pfault);
	srcu_read_unlock(&priv->pfault_srcu, srcu_idx);
}
#endif

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
	53	void mlx5_add_device(struct mlx5_interface intf, struct mlx5_priv priv)
	54	{
	55	struct mlx5_device_context *dev_ctx;
	56	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	57
	58	if (!mlx5_lag_intf_add(intf, priv))
	59	return;
	60
	61	dev_ctx = kzalloc(sizeof(*dev_ctx), GFP_KERNEL);
	62	if (!dev_ctx)
	63	return;
	64
65	dev_ctx->intf = intf;
66	dev_ctx->context = intf->add(dev);
67	set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
68	if (intf->attach)
69	set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
70
71	if (dev_ctx->context) {
72	spin_lock_irq(&priv->ctx_lock);
73	list_add_tail(&dev_ctx->list, &priv->ctx_list);
d9aaed83 AK	74	#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
	75	if (dev_ctx->intf->pfault) {
	76	if (priv->pfault) {
	77	mlx5_core_err(dev, "multiple page fault handlers not supported");
	78	} else {
	79	priv->pfault_ctx = dev_ctx->context;
	80	priv->pfault = dev_ctx->intf->pfault;
	81	}
	82	}
	83	#endif
f1ee87fe MHY	84	spin_unlock_irq(&priv->ctx_lock);
	85	} else {
	86	kfree(dev_ctx);
	87	}
	88	}
	89
	90	static struct mlx5_device_context mlx5_get_device(struct mlx5_interface intf,
	91	struct mlx5_priv *priv)
	92	{
	93	struct mlx5_device_context *dev_ctx;
	94
	95	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
	96	if (dev_ctx->intf == intf)
	97	return dev_ctx;
	98	return NULL;
	99	}
	100
	101	void mlx5_remove_device(struct mlx5_interface intf, struct mlx5_priv priv)
	102	{
	103	struct mlx5_device_context *dev_ctx;
	104	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	105
	106	dev_ctx = mlx5_get_device(intf, priv);
	107	if (!dev_ctx)
	108	return;
	109
d9aaed83 AK	110	#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
	111	spin_lock_irq(&priv->ctx_lock);
	112	if (priv->pfault == dev_ctx->intf->pfault)
	113	priv->pfault = NULL;
	114	spin_unlock_irq(&priv->ctx_lock);
	115
	116	synchronize_srcu(&priv->pfault_srcu);
	117	#endif
	118
f1ee87fe MHY	119	spin_lock_irq(&priv->ctx_lock);
	120	list_del(&dev_ctx->list);
	121	spin_unlock_irq(&priv->ctx_lock);
	122
	123	if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
	124	intf->remove(dev, dev_ctx->context);
	125
	126	kfree(dev_ctx);
	127	}
	128
	129	static void mlx5_attach_interface(struct mlx5_interface intf, struct mlx5_priv priv)
	130	{
	131	struct mlx5_device_context *dev_ctx;
	132	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	133
	134	dev_ctx = mlx5_get_device(intf, priv);
	135	if (!dev_ctx)
	136	return;
	137
	138	if (intf->attach) {
	139	if (test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
	140	return;
	141	intf->attach(dev, dev_ctx->context);
	142	set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
	143	} else {
	144	if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
	145	return;
	146	dev_ctx->context = intf->add(dev);
	147	set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	148	}
	149	}
	150
	151	void mlx5_attach_device(struct mlx5_core_dev *dev)
	152	{
	153	struct mlx5_priv *priv = &dev->priv;
	154	struct mlx5_interface *intf;
	155
	156	mutex_lock(&mlx5_intf_mutex);
	157	list_for_each_entry(intf, &intf_list, list)
	158	mlx5_attach_interface(intf, priv);
	159	mutex_unlock(&mlx5_intf_mutex);
	160	}
	161
	162	static void mlx5_detach_interface(struct mlx5_interface intf, struct mlx5_priv priv)
	163	{
	164	struct mlx5_device_context *dev_ctx;
	165	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
	166
	167	dev_ctx = mlx5_get_device(intf, priv);
	168	if (!dev_ctx)
	169	return;
	170
	171	if (intf->detach) {
	172	if (!test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
	173	return;
	174	intf->detach(dev, dev_ctx->context);
	175	clear_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
	176	} else {
	177	if (!test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
	178	return;
	179	intf->remove(dev, dev_ctx->context);
	180	clear_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
	181	}
	182	}
183
184	void mlx5_detach_device(struct mlx5_core_dev *dev)
185	{
186	struct mlx5_priv *priv = &dev->priv;
187	struct mlx5_interface *intf;
188
189	mutex_lock(&mlx5_intf_mutex);
190	list_for_each_entry(intf, &intf_list, list)
191	mlx5_detach_interface(intf, priv);
192	mutex_unlock(&mlx5_intf_mutex);
193	}
194
195	bool mlx5_device_registered(struct mlx5_core_dev *dev)
196	{
197	struct mlx5_priv *priv;
198	bool found = false;
199
200	mutex_lock(&mlx5_intf_mutex);
201	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
202	if (priv == &dev->priv)
203	found = true;
204	mutex_unlock(&mlx5_intf_mutex);
205
206	return found;
207	}
208
209	int mlx5_register_device(struct mlx5_core_dev *dev)
210	{
211	struct mlx5_priv *priv = &dev->priv;
212	struct mlx5_interface *intf;
213
214	mutex_lock(&mlx5_intf_mutex);
215	list_add_tail(&priv->dev_list, &mlx5_dev_list);
216	list_for_each_entry(intf, &intf_list, list)
217	mlx5_add_device(intf, priv);
218	mutex_unlock(&mlx5_intf_mutex);
219
220	return 0;
221	}
222
223	void mlx5_unregister_device(struct mlx5_core_dev *dev)
224	{
225	struct mlx5_priv *priv = &dev->priv;
226	struct mlx5_interface *intf;
227
228	mutex_lock(&mlx5_intf_mutex);
229	list_for_each_entry(intf, &intf_list, list)
230	mlx5_remove_device(intf, priv);
231	list_del(&priv->dev_list);
232	mutex_unlock(&mlx5_intf_mutex);
233	}
234
235	int mlx5_register_interface(struct mlx5_interface *intf)
236	{
237	struct mlx5_priv *priv;
238
239	if (!intf->add \|\| !intf->remove)
240	return -EINVAL;
241
242	mutex_lock(&mlx5_intf_mutex);
243	list_add_tail(&intf->list, &intf_list);
244	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
245	mlx5_add_device(intf, priv);
246	mutex_unlock(&mlx5_intf_mutex);
247
248	return 0;
249	}
250	EXPORT_SYMBOL(mlx5_register_interface);
251
252	void mlx5_unregister_interface(struct mlx5_interface *intf)
253	{
254	struct mlx5_priv *priv;
255
256	mutex_lock(&mlx5_intf_mutex);
257	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
258	mlx5_remove_device(intf, priv);
259	list_del(&intf->list);
260	mutex_unlock(&mlx5_intf_mutex);
261	}
262	EXPORT_SYMBOL(mlx5_unregister_interface);
263
264	void mlx5_get_protocol_dev(struct mlx5_core_dev mdev, int protocol)
265	{
266	struct mlx5_priv *priv = &mdev->priv;
267	struct mlx5_device_context *dev_ctx;
268	unsigned long flags;
269	void *result = NULL;
270
271	spin_lock_irqsave(&priv->ctx_lock, flags);
272
273	list_for_each_entry(dev_ctx, &mdev->priv.ctx_list, list)
274	if ((dev_ctx->intf->protocol == protocol) &&
275	dev_ctx->intf->get_dev) {
276	result = dev_ctx->intf->get_dev(dev_ctx->context);
277	break;
278	}
279
280	spin_unlock_irqrestore(&priv->ctx_lock, flags);
281
282	return result;
283	}
284	EXPORT_SYMBOL(mlx5_get_protocol_dev);
285
286	/* Must be called with intf_mutex held */
287	void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
288	{
289	struct mlx5_interface *intf;
290
291	list_for_each_entry(intf, &intf_list, list)
292	if (intf->protocol == protocol) {
293	mlx5_add_device(intf, &dev->priv);
294	break;
295	}
296	}
297
298	/* Must be called with intf_mutex held */
299	void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
300	{
301	struct mlx5_interface *intf;
302
303	list_for_each_entry(intf, &intf_list, list)
304	if (intf->protocol == protocol) {
305	mlx5_remove_device(intf, &dev->priv);
306	break;
307	}
308	}
309
310	static u16 mlx5_gen_pci_id(struct mlx5_core_dev *dev)
311	{
312	return (u16)((dev->pdev->bus->number << 8) \|
313	PCI_SLOT(dev->pdev->devfn));
314	}
315
316	/* Must be called with intf_mutex held */
317	struct mlx5_core_dev mlx5_get_next_phys_dev(struct mlx5_core_dev dev)
318	{
319	u16 pci_id = mlx5_gen_pci_id(dev);
320	struct mlx5_core_dev *res = NULL;
321	struct mlx5_core_dev *tmp_dev;
322	struct mlx5_priv *priv;
323
324	list_for_each_entry(priv, &mlx5_dev_list, dev_list) {
325	tmp_dev = container_of(priv, struct mlx5_core_dev, priv);
326	if ((dev != tmp_dev) && (mlx5_gen_pci_id(tmp_dev) == pci_id)) {
327	res = tmp_dev;
328	break;
329	}
330	}
331
332	return res;
333	}
334
335	void mlx5_core_event(struct mlx5_core_dev *dev, enum mlx5_dev_event event,
336	unsigned long param)
337	{
338	struct mlx5_priv *priv = &dev->priv;
339	struct mlx5_device_context *dev_ctx;
340	unsigned long flags;
341
342	spin_lock_irqsave(&priv->ctx_lock, flags);
343
344	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
345	if (dev_ctx->intf->event)
346	dev_ctx->intf->event(dev, dev_ctx->context, event, param);
347
348	spin_unlock_irqrestore(&priv->ctx_lock, flags);
349	}
350
d9aaed83 AK	351	#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
	352	void mlx5_core_page_fault(struct mlx5_core_dev *dev,
	353	struct mlx5_pagefault *pfault)
	354	{
	355	struct mlx5_priv *priv = &dev->priv;
	356	int srcu_idx;
	357
	358	srcu_idx = srcu_read_lock(&priv->pfault_srcu);
	359	if (priv->pfault)
	360	priv->pfault(dev, priv->pfault_ctx, pfault);
	361	srcu_read_unlock(&priv->pfault_srcu, srcu_idx);
	362	}
	363	#endif
	364
f1ee87fe MHY	365	void mlx5_dev_list_lock(void)
	366	{
	367	mutex_lock(&mlx5_intf_mutex);
	368	}
	369
	370	void mlx5_dev_list_unlock(void)
	371	{
	372	mutex_unlock(&mlx5_intf_mutex);
	373	}
	374
	375	int mlx5_dev_list_trylock(void)
	376	{
	377	return mutex_trylock(&mlx5_intf_mutex);
	378	}