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

/*
 * Copyright (c) 2007 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/cpumask.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/slab.h>

#include <linux/mlx4/driver.h>
#include <linux/mlx4/device.h>
#include <linux/mlx4/cmd.h>

#include "mlx4_en.h"

MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");
MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")");

static const char mlx4_en_version[] =
	DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
	DRV_VERSION " (" DRV_RELDATE ")\n";

#define MLX4_EN_PARM_INT(X, def_val, desc) \
	static unsigned int X = def_val;\
	module_param(X , uint, 0444); \
	MODULE_PARM_DESC(X, desc);


/*
 * Device scope module parameters
 */

/* Enable RSS UDP traffic */
MLX4_EN_PARM_INT(udp_rss, 1,
		 "Enable RSS for incomming UDP traffic or disabled (0)");

/* Priority pausing */
MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
			   " Per priority bit mask");
MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
			   " Per priority bit mask");

int en_print(const char *level, const struct mlx4_en_priv *priv,
	     const char *format, ...)
{
	va_list args;
	struct va_format vaf;
	int i;

	va_start(args, format);

	vaf.fmt = format;
	vaf.va = &args;
	if (priv->registered)
		i = printk("%s%s: %s: %pV",
			   level, DRV_NAME, priv->dev->name, &vaf);
	else
		i = printk("%s%s: %s: Port %d: %pV",
			   level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
			   priv->port, &vaf);
	va_end(args);

	return i;
}

static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
{
	struct mlx4_en_profile *params = &mdev->profile;
	int i;

	params->udp_rss = udp_rss;
	params->num_tx_rings_p_up = min_t(int, num_online_cpus(),
			MLX4_EN_MAX_TX_RING_P_UP);
	if (params->udp_rss && !(mdev->dev->caps.flags
					& MLX4_DEV_CAP_FLAG_UDP_RSS)) {
		mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
		params->udp_rss = 0;
	}
	for (i = 1; i <= MLX4_MAX_PORTS; i++) {
		params->prof[i].rx_pause = 1;
		params->prof[i].rx_ppp = pfcrx;
		params->prof[i].tx_pause = 1;
		params->prof[i].tx_ppp = pfctx;
		params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
		params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
		params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
			MLX4_EN_NUM_UP;
		params->prof[i].rss_rings = 0;
	}

	return 0;
}

static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
{
	struct mlx4_en_dev *endev = ctx;

	return endev->pndev[port];
}

static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
			  enum mlx4_dev_event event, unsigned long port)
{
	struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
	struct mlx4_en_priv *priv;

	switch (event) {
	case MLX4_DEV_EVENT_PORT_UP:
	case MLX4_DEV_EVENT_PORT_DOWN:
		if (!mdev->pndev[port])
			return;
		priv = netdev_priv(mdev->pndev[port]);
		/* To prevent races, we poll the link state in a separate
		  task rather than changing it here */
		priv->link_state = event;
		queue_work(mdev->workqueue, &priv->linkstate_task);
		break;

	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
		mlx4_err(mdev, "Internal error detected, restarting device\n");
		break;

	default:
		if (port < 1 || port > dev->caps.num_ports ||
		    !mdev->pndev[port])
			return;
		mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
			  (int) port);
	}
}

static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
{
	struct mlx4_en_dev *mdev = endev_ptr;
	int i;

	mutex_lock(&mdev->state_lock);
	mdev->device_up = false;
	mutex_unlock(&mdev->state_lock);

	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
		if (mdev->pndev[i])
			mlx4_en_destroy_netdev(mdev->pndev[i]);

	flush_workqueue(mdev->workqueue);
	destroy_workqueue(mdev->workqueue);
	mlx4_mr_free(dev, &mdev->mr);
	iounmap(mdev->uar_map);
	mlx4_uar_free(dev, &mdev->priv_uar);
	mlx4_pd_free(dev, mdev->priv_pdn);
	kfree(mdev);
}

static void *mlx4_en_add(struct mlx4_dev *dev)
{
	struct mlx4_en_dev *mdev;
	int i;
	int err;

	printk_once(KERN_INFO "%s", mlx4_en_version);

	mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
	if (!mdev) {
		dev_err(&dev->pdev->dev, "Device struct alloc failed, "
			"aborting.\n");
		err = -ENOMEM;
		goto err_free_res;
	}

	if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
		goto err_free_dev;

	if (mlx4_uar_alloc(dev, &mdev->priv_uar))
		goto err_pd;

	mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
				PAGE_SIZE);
	if (!mdev->uar_map)
		goto err_uar;
	spin_lock_init(&mdev->uar_lock);

	mdev->dev = dev;
	mdev->dma_device = &(dev->pdev->dev);
	mdev->pdev = dev->pdev;
	mdev->device_up = false;

	mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
	if (!mdev->LSO_support)
		mlx4_warn(mdev, "LSO not supported, please upgrade to later "
				"FW version to enable LSO\n");

	if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
			 MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
			 0, 0, &mdev->mr)) {
		mlx4_err(mdev, "Failed allocating memory region\n");
		goto err_map;
	}
	if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
		mlx4_err(mdev, "Failed enabling memory region\n");
		goto err_mr;
	}

	/* Build device profile according to supplied module parameters */
	err = mlx4_en_get_profile(mdev);
	if (err) {
		mlx4_err(mdev, "Bad module parameters, aborting.\n");
		goto err_mr;
	}

	/* Configure which ports to start according to module parameters */
	mdev->port_cnt = 0;
	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
		mdev->port_cnt++;

	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
		if (!dev->caps.comp_pool) {
			mdev->profile.prof[i].rx_ring_num =
				rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
							   min_t(int,
								 dev->caps.num_comp_vectors,
								 MAX_RX_RINGS)));
		} else {
			mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
				min_t(int, dev->caps.comp_pool/
				      dev->caps.num_ports - 1 , MAX_MSIX_P_PORT - 1));
		}
	}

	/* Create our own workqueue for reset/multicast tasks
	 * Note: we cannot use the shared workqueue because of deadlocks caused
	 *       by the rtnl lock */
	mdev->workqueue = create_singlethread_workqueue("mlx4_en");
	if (!mdev->workqueue) {
		err = -ENOMEM;
		goto err_mr;
	}

	/* At this stage all non-port specific tasks are complete:
	 * mark the card state as up */
	mutex_init(&mdev->state_lock);
	mdev->device_up = true;

	/* Setup ports */

	/* Create a netdev for each port */
	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
		mlx4_info(mdev, "Activating port:%d\n", i);
		if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
			mdev->pndev[i] = NULL;
	}
	return mdev;

err_mr:
	mlx4_mr_free(dev, &mdev->mr);
err_map:
	if (!mdev->uar_map)
		iounmap(mdev->uar_map);
err_uar:
	mlx4_uar_free(dev, &mdev->priv_uar);
err_pd:
	mlx4_pd_free(dev, mdev->priv_pdn);
err_free_dev:
	kfree(mdev);
err_free_res:
	return NULL;
}

static struct mlx4_interface mlx4_en_interface = {
	.add		= mlx4_en_add,
	.remove		= mlx4_en_remove,
	.event		= mlx4_en_event,
	.get_dev	= mlx4_en_get_netdev,
	.protocol	= MLX4_PROT_ETH,
};

static int __init mlx4_en_init(void)
{
	return mlx4_register_interface(&mlx4_en_interface);
}

static void __exit mlx4_en_cleanup(void)
{
	mlx4_unregister_interface(&mlx4_en_interface);
}

module_init(mlx4_en_init);
module_exit(mlx4_en_cleanup);
Commit	Line	Data
c27a02cd YP	1	/*
	2	* Copyright (c) 2007 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
	34	#include <linux/cpumask.h>
	35	#include <linux/module.h>
	36	#include <linux/delay.h>
	37	#include <linux/netdevice.h>
5a0e3ad6	38	#include <linux/slab.h>
c27a02cd YP	39
	40	#include <linux/mlx4/driver.h>
	41	#include <linux/mlx4/device.h>
	42	#include <linux/mlx4/cmd.h>
	43
	44	#include "mlx4_en.h"
	45
	46	MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");
	47	MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");
	48	MODULE_LICENSE("Dual BSD/GPL");
	49	MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")");
	50
	51	static const char mlx4_en_version[] =
	52	DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
	53	DRV_VERSION " (" DRV_RELDATE ")\n";
	54
a2b28737 YP	55	#define MLX4_EN_PARM_INT(X, def_val, desc) \
	56	static unsigned int X = def_val;\
	57	module_param(X , uint, 0444); \
	58	MODULE_PARM_DESC(X, desc);
	59
	60
	61	/*
	62	* Device scope module parameters
	63	*/
	64
0533943c YP	65	/* Enable RSS UDP traffic */
	66	MLX4_EN_PARM_INT(udp_rss, 1,
	67	"Enable RSS for incomming UDP traffic or disabled (0)");
a2b28737	68
a2b28737 YP	69	/* Priority pausing */
	70	MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
	71	" Per priority bit mask");
	72	MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
	73	" Per priority bit mask");
	74
0a645e80 JP	75	int en_print(const char level, const struct mlx4_en_priv priv,
	76	const char *format, ...)
	77	{
	78	va_list args;
	79	struct va_format vaf;
	80	int i;
	81
	82	va_start(args, format);
	83
	84	vaf.fmt = format;
	85	vaf.va = &args;
	86	if (priv->registered)
	87	i = printk("%s%s: %s: %pV",
	88	level, DRV_NAME, priv->dev->name, &vaf);
	89	else
	90	i = printk("%s%s: %s: Port %d: %pV",
	91	level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
	92	priv->port, &vaf);
	93	va_end(args);
	94
	95	return i;
	96	}
	97
a2b28737 YP	98	static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
	99	{
	100	struct mlx4_en_profile *params = &mdev->profile;
	101	int i;
	102
0533943c	103	params->udp_rss = udp_rss;
bc6a4744 AV	104	params->num_tx_rings_p_up = min_t(int, num_online_cpus(),
bc6a4744 AV	105	MLX4_EN_MAX_TX_RING_P_UP);
ccf86321 OG	106	if (params->udp_rss && !(mdev->dev->caps.flags
ccf86321 OG	107	& MLX4_DEV_CAP_FLAG_UDP_RSS)) {
0533943c YP	108	mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
	109	params->udp_rss = 0;
	110	}
a2b28737 YP	111	for (i = 1; i <= MLX4_MAX_PORTS; i++) {
	112	params->prof[i].rx_pause = 1;
	113	params->prof[i].rx_ppp = pfcrx;
	114	params->prof[i].tx_pause = 1;
	115	params->prof[i].tx_ppp = pfctx;
	116	params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
	117	params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
bc6a4744 AV	118	params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
bc6a4744 AV	119	MLX4_EN_NUM_UP;
93d3e367	120	params->prof[i].rss_rings = 0;
a2b28737 YP	121	}
	122
	123	return 0;
	124	}
	125
33c87f0a EC	126	static void mlx4_en_get_netdev(struct mlx4_dev dev, void *ctx, u8 port)
	127	{
	128	struct mlx4_en_dev *endev = ctx;
	129
	130	return endev->pndev[port];
	131	}
	132
c27a02cd	133	static void mlx4_en_event(struct mlx4_dev dev, void endev_ptr,
00f5ce99	134	enum mlx4_dev_event event, unsigned long port)
c27a02cd YP	135	{
	136	struct mlx4_en_dev mdev = (struct mlx4_en_dev ) endev_ptr;
	137	struct mlx4_en_priv *priv;
	138
c27a02cd YP	139	switch (event) {
	140	case MLX4_DEV_EVENT_PORT_UP:
	141	case MLX4_DEV_EVENT_PORT_DOWN:
13bf58b7 JM	142	if (!mdev->pndev[port])
	143	return;
	144	priv = netdev_priv(mdev->pndev[port]);
c27a02cd YP	145	/* To prevent races, we poll the link state in a separate
	146	task rather than changing it here */
	147	priv->link_state = event;
	148	queue_work(mdev->workqueue, &priv->linkstate_task);
	149	break;
	150
	151	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
	152	mlx4_err(mdev, "Internal error detected, restarting device\n");
	153	break;
	154
	155	default:
13bf58b7 JM	156	if (port < 1 \|\| port > dev->caps.num_ports \|\|
	157	!mdev->pndev[port])
	158	return;
00f5ce99 JM	159	mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
00f5ce99 JM	160	(int) port);
c27a02cd YP	161	}
	162	}
	163
	164	static void mlx4_en_remove(struct mlx4_dev dev, void endev_ptr)
	165	{
	166	struct mlx4_en_dev *mdev = endev_ptr;
	167	int i;
	168
	169	mutex_lock(&mdev->state_lock);
	170	mdev->device_up = false;
	171	mutex_unlock(&mdev->state_lock);
	172
	173	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
	174	if (mdev->pndev[i])
	175	mlx4_en_destroy_netdev(mdev->pndev[i]);
	176
	177	flush_workqueue(mdev->workqueue);
	178	destroy_workqueue(mdev->workqueue);
	179	mlx4_mr_free(dev, &mdev->mr);
7398af40	180	iounmap(mdev->uar_map);
c27a02cd YP	181	mlx4_uar_free(dev, &mdev->priv_uar);
	182	mlx4_pd_free(dev, mdev->priv_pdn);
	183	kfree(mdev);
	184	}
	185
	186	static void mlx4_en_add(struct mlx4_dev dev)
	187	{
c27a02cd YP	188	struct mlx4_en_dev *mdev;
	189	int i;
	190	int err;
	191
0a645e80	192	printk_once(KERN_INFO "%s", mlx4_en_version);
c27a02cd YP	193
	194	mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
	195	if (!mdev) {
	196	dev_err(&dev->pdev->dev, "Device struct alloc failed, "
	197	"aborting.\n");
	198	err = -ENOMEM;
	199	goto err_free_res;
	200	}
	201
	202	if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
	203	goto err_free_dev;
	204
	205	if (mlx4_uar_alloc(dev, &mdev->priv_uar))
	206	goto err_pd;
	207
4979d18f RD	208	mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
4979d18f RD	209	PAGE_SIZE);
c27a02cd YP	210	if (!mdev->uar_map)
	211	goto err_uar;
	212	spin_lock_init(&mdev->uar_lock);
	213
	214	mdev->dev = dev;
	215	mdev->dma_device = &(dev->pdev->dev);
	216	mdev->pdev = dev->pdev;
	217	mdev->device_up = false;
	218
	219	mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
	220	if (!mdev->LSO_support)
	221	mlx4_warn(mdev, "LSO not supported, please upgrade to later "
	222	"FW version to enable LSO\n");
	223
	224	if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
	225	MLX4_PERM_LOCAL_WRITE \| MLX4_PERM_LOCAL_READ,
	226	0, 0, &mdev->mr)) {
	227	mlx4_err(mdev, "Failed allocating memory region\n");
7398af40	228	goto err_map;
c27a02cd YP	229	}
	230	if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
	231	mlx4_err(mdev, "Failed enabling memory region\n");
	232	goto err_mr;
	233	}
	234
	235	/* Build device profile according to supplied module parameters */
	236	err = mlx4_en_get_profile(mdev);
	237	if (err) {
	238	mlx4_err(mdev, "Bad module parameters, aborting.\n");
	239	goto err_mr;
	240	}
	241
25985edc	242	/* Configure which ports to start according to module parameters */
c27a02cd YP	243	mdev->port_cnt = 0;
	244	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
	245	mdev->port_cnt++;
	246
c27a02cd	247	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
1fb9876e YP	248	if (!dev->caps.comp_pool) {
	249	mdev->profile.prof[i].rx_ring_num =
	250	rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
	251	min_t(int,
	252	dev->caps.num_comp_vectors,
	253	MAX_RX_RINGS)));
	254	} else {
	255	mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
	256	min_t(int, dev->caps.comp_pool/
	257	dev->caps.num_ports - 1 , MAX_MSIX_P_PORT - 1));
	258	}
c27a02cd YP	259	}
	260
	261	/* Create our own workqueue for reset/multicast tasks
	262	* Note: we cannot use the shared workqueue because of deadlocks caused
	263	* by the rtnl lock */
	264	mdev->workqueue = create_singlethread_workqueue("mlx4_en");
	265	if (!mdev->workqueue) {
	266	err = -ENOMEM;
1a44cc37	267	goto err_mr;
c27a02cd YP	268	}
	269
	270	/* At this stage all non-port specific tasks are complete:
	271	* mark the card state as up */
	272	mutex_init(&mdev->state_lock);
	273	mdev->device_up = true;
	274
	275	/* Setup ports */
	276
	277	/* Create a netdev for each port */
	278	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
	279	mlx4_info(mdev, "Activating port:%d\n", i);
3c2fa83f	280	if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
c27a02cd	281	mdev->pndev[i] = NULL;
c27a02cd YP	282	}
	283	return mdev;
	284
c27a02cd YP	285	err_mr:
c27a02cd YP	286	mlx4_mr_free(dev, &mdev->mr);
7398af40 AG	287	err_map:
	288	if (!mdev->uar_map)
	289	iounmap(mdev->uar_map);
c27a02cd YP	290	err_uar:
	291	mlx4_uar_free(dev, &mdev->priv_uar);
	292	err_pd:
	293	mlx4_pd_free(dev, mdev->priv_pdn);
	294	err_free_dev:
	295	kfree(mdev);
	296	err_free_res:
	297	return NULL;
	298	}
	299
	300	static struct mlx4_interface mlx4_en_interface = {
33c87f0a EC	301	.add = mlx4_en_add,
	302	.remove = mlx4_en_remove,
	303	.event = mlx4_en_event,
	304	.get_dev = mlx4_en_get_netdev,
0345584e	305	.protocol = MLX4_PROT_ETH,
c27a02cd YP	306	};
	307
	308	static int __init mlx4_en_init(void)
	309	{
	310	return mlx4_register_interface(&mlx4_en_interface);
	311	}
	312
	313	static void __exit mlx4_en_cleanup(void)
	314	{
	315	mlx4_unregister_interface(&mlx4_en_interface);
	316	}
	317
	318	module_init(mlx4_en_init);
	319	module_exit(mlx4_en_cleanup);
	320