[deliverable/linux.git] / drivers / net / 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/cpumask.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";

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

	if (!mdev->pndev[port])
		return;

	priv = netdev_priv(mdev->pndev[port]);
	switch (event) {
	case MLX4_DEV_EVENT_PORT_UP:
	case MLX4_DEV_EVENT_PORT_DOWN:
		/* 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:
		mlx4_warn(mdev, "Unhandled event: %d\n", event);
	}
}

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);
	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)
{
	static int mlx4_en_version_printed;
	struct mlx4_en_dev *mdev;
	int i;
	int err;

	if (!mlx4_en_version_printed) {
		printk(KERN_INFO "%s", mlx4_en_version);
		mlx4_en_version_printed++;
	}

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

	/* If we did not receive an explicit number of Rx rings, default to
	 * the number of completion vectors populated by the mlx4_core */
	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
		mlx4_info(mdev, "Using %d tx rings for port:%d\n",
			  mdev->profile.prof[i].tx_ring_num, i);
		if (!mdev->profile.prof[i].rx_ring_num) {
			mdev->profile.prof[i].rx_ring_num = 1;
			mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
				  1, i);
		} else
			mlx4_info(mdev, "Using %d rx rings for port:%d\n",
				  mdev->profile.prof[i].rx_ring_num, i);
	}

	/* 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_close_nic;
	}

	/* 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;
			goto err_free_netdev;
		}
	}
	return mdev;


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

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

	/* Stop event queue before we drop down to release shared SW state */

err_close_nic:
	destroy_workqueue(mdev->workqueue);
err_mr:
	mlx4_mr_free(dev, &mdev->mr);
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,
};

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>
	38	#include <linux/cpumask.h>
	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
	55	static void mlx4_en_event(struct mlx4_dev dev, void endev_ptr,
	56	enum mlx4_dev_event event, int port)
	57	{
	58	struct mlx4_en_dev mdev = (struct mlx4_en_dev ) endev_ptr;
	59	struct mlx4_en_priv *priv;
	60
	61	if (!mdev->pndev[port])
	62	return;
	63
	64	priv = netdev_priv(mdev->pndev[port]);
65	switch (event) {
66	case MLX4_DEV_EVENT_PORT_UP:
67	case MLX4_DEV_EVENT_PORT_DOWN:
68	/* To prevent races, we poll the link state in a separate
69	task rather than changing it here */
70	priv->link_state = event;
71	queue_work(mdev->workqueue, &priv->linkstate_task);
72	break;
73
74	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
75	mlx4_err(mdev, "Internal error detected, restarting device\n");
76	break;
77
78	default:
79	mlx4_warn(mdev, "Unhandled event: %d\n", event);
80	}
81	}
82
83	static void mlx4_en_remove(struct mlx4_dev dev, void endev_ptr)
84	{
85	struct mlx4_en_dev *mdev = endev_ptr;
86	int i;
87
88	mutex_lock(&mdev->state_lock);
89	mdev->device_up = false;
90	mutex_unlock(&mdev->state_lock);
91
92	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
93	if (mdev->pndev[i])
94	mlx4_en_destroy_netdev(mdev->pndev[i]);
95
96	flush_workqueue(mdev->workqueue);
97	destroy_workqueue(mdev->workqueue);
98	mlx4_mr_free(dev, &mdev->mr);
99	mlx4_uar_free(dev, &mdev->priv_uar);
100	mlx4_pd_free(dev, mdev->priv_pdn);
101	kfree(mdev);
102	}
103
104	static void mlx4_en_add(struct mlx4_dev dev)
105	{
106	static int mlx4_en_version_printed;
107	struct mlx4_en_dev *mdev;
108	int i;
109	int err;
110
111	if (!mlx4_en_version_printed) {
112	printk(KERN_INFO "%s", mlx4_en_version);
113	mlx4_en_version_printed++;
114	}
115
116	mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
117	if (!mdev) {
118	dev_err(&dev->pdev->dev, "Device struct alloc failed, "
119	"aborting.\n");
120	err = -ENOMEM;
121	goto err_free_res;
122	}
123
124	if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
125	goto err_free_dev;
126
127	if (mlx4_uar_alloc(dev, &mdev->priv_uar))
128	goto err_pd;
129
130	mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
131	if (!mdev->uar_map)
132	goto err_uar;
133	spin_lock_init(&mdev->uar_lock);
134
135	mdev->dev = dev;
136	mdev->dma_device = &(dev->pdev->dev);
137	mdev->pdev = dev->pdev;
138	mdev->device_up = false;
139
140	mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
141	if (!mdev->LSO_support)
142	mlx4_warn(mdev, "LSO not supported, please upgrade to later "
143	"FW version to enable LSO\n");
144
145	if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
146	MLX4_PERM_LOCAL_WRITE \| MLX4_PERM_LOCAL_READ,
147	0, 0, &mdev->mr)) {
148	mlx4_err(mdev, "Failed allocating memory region\n");
149	goto err_uar;
150	}
151	if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
152	mlx4_err(mdev, "Failed enabling memory region\n");
153	goto err_mr;
154	}
155
156	/* Build device profile according to supplied module parameters */
157	err = mlx4_en_get_profile(mdev);
158	if (err) {
159	mlx4_err(mdev, "Bad module parameters, aborting.\n");
160	goto err_mr;
161	}
162
163	/* Configure wich ports to start according to module parameters */
164	mdev->port_cnt = 0;
165	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
166	mdev->port_cnt++;
167
168	/* If we did not receive an explicit number of Rx rings, default to
169	* the number of completion vectors populated by the mlx4_core */
170	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
171	mlx4_info(mdev, "Using %d tx rings for port:%d\n",
172	mdev->profile.prof[i].tx_ring_num, i);
173	if (!mdev->profile.prof[i].rx_ring_num) {
174	mdev->profile.prof[i].rx_ring_num = 1;
175	mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
176	1, i);
177	} else
178	mlx4_info(mdev, "Using %d rx rings for port:%d\n",
179	mdev->profile.prof[i].rx_ring_num, i);
180	}
181
182	/* Create our own workqueue for reset/multicast tasks
183	* Note: we cannot use the shared workqueue because of deadlocks caused
184	* by the rtnl lock */
185	mdev->workqueue = create_singlethread_workqueue("mlx4_en");
186	if (!mdev->workqueue) {
187	err = -ENOMEM;
188	goto err_close_nic;
189	}
190
191	/* At this stage all non-port specific tasks are complete:
192	* mark the card state as up */
193	mutex_init(&mdev->state_lock);
194	mdev->device_up = true;
195
196	/* Setup ports */
197
198	/* Create a netdev for each port */
199	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
200	mlx4_info(mdev, "Activating port:%d\n", i);
201	if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) {
202	mdev->pndev[i] = NULL;
203	goto err_free_netdev;
204	}
205	}
206	return mdev;
207
208
209	err_free_netdev:
210	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
211	if (mdev->pndev[i])
212	mlx4_en_destroy_netdev(mdev->pndev[i]);
213	}
214
215	mutex_lock(&mdev->state_lock);
216	mdev->device_up = false;
217	mutex_unlock(&mdev->state_lock);
218	flush_workqueue(mdev->workqueue);
219
220	/* Stop event queue before we drop down to release shared SW state */
221
222	err_close_nic:
223	destroy_workqueue(mdev->workqueue);
224	err_mr:
225	mlx4_mr_free(dev, &mdev->mr);
226	err_uar:
227	mlx4_uar_free(dev, &mdev->priv_uar);
228	err_pd:
229	mlx4_pd_free(dev, mdev->priv_pdn);
230	err_free_dev:
231	kfree(mdev);
232	err_free_res:
233	return NULL;
234	}
235
236	static struct mlx4_interface mlx4_en_interface = {
237	.add = mlx4_en_add,
238	.remove = mlx4_en_remove,
239	.event = mlx4_en_event,
240	};
241
242	static int __init mlx4_en_init(void)
243	{
244	return mlx4_register_interface(&mlx4_en_interface);
245	}
246
247	static void __exit mlx4_en_cleanup(void)
248	{
249	mlx4_unregister_interface(&mlx4_en_interface);
250	}
251
252	module_init(mlx4_en_init);
253	module_exit(mlx4_en_cleanup);
254