[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/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
 */


/* Use a XOR rathern than Toeplitz hash function for RSS */
MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS");

/* RSS hash type mask - default to <saddr, daddr, sport, dport> */
MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask");

/* Number of LRO sessions per Rx ring (rounded up to a power of two) */
MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS,
		 "Number of LRO sessions per ring 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");

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

	params->rss_xor = (rss_xor != 0);
	params->rss_mask = rss_mask & 0x1f;
	params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS);
	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 = MLX4_EN_NUM_TX_RINGS +
			(!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
	}

	return 0;
}

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);
		mdev->profile.prof[i].rx_ring_num = min_t(int,
			roundup_pow_of_two(dev->caps.num_comp_vectors),
			MAX_RX_RINGS);
		mlx4_info(mdev, "Defaulting to %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_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_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>
c27a02cd YP	38
	39	#include <linux/mlx4/driver.h>
	40	#include <linux/mlx4/device.h>
	41	#include <linux/mlx4/cmd.h>
	42
	43	#include "mlx4_en.h"
	44
	45	MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");
	46	MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");
	47	MODULE_LICENSE("Dual BSD/GPL");
	48	MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")");
	49
	50	static const char mlx4_en_version[] =
	51	DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
	52	DRV_VERSION " (" DRV_RELDATE ")\n";
	53
a2b28737 YP	54	#define MLX4_EN_PARM_INT(X, def_val, desc) \
	55	static unsigned int X = def_val;\
	56	module_param(X , uint, 0444); \
	57	MODULE_PARM_DESC(X, desc);
	58
	59
	60	/*
	61	* Device scope module parameters
	62	*/
	63
	64
	65	/* Use a XOR rathern than Toeplitz hash function for RSS */
	66	MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS");
	67
	68	/* RSS hash type mask - default to <saddr, daddr, sport, dport> */
	69	MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask");
	70
	71	/* Number of LRO sessions per Rx ring (rounded up to a power of two) */
	72	MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS,
	73	"Number of LRO sessions per ring or disabled (0)");
	74
	75	/* Priority pausing */
	76	MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
	77	" Per priority bit mask");
	78	MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
	79	" Per priority bit mask");
	80
	81	static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
	82	{
	83	struct mlx4_en_profile *params = &mdev->profile;
	84	int i;
	85
	86	params->rss_xor = (rss_xor != 0);
	87	params->rss_mask = rss_mask & 0x1f;
	88	params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS);
	89	for (i = 1; i <= MLX4_MAX_PORTS; i++) {
	90	params->prof[i].rx_pause = 1;
	91	params->prof[i].rx_ppp = pfcrx;
	92	params->prof[i].tx_pause = 1;
	93	params->prof[i].tx_ppp = pfctx;
	94	params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
	95	params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
f813cad8 YP	96	params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
f813cad8 YP	97	(!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
a2b28737 YP	98	}
	99
	100	return 0;
	101	}
	102
c27a02cd YP	103	static void mlx4_en_event(struct mlx4_dev dev, void endev_ptr,
	104	enum mlx4_dev_event event, int port)
	105	{
	106	struct mlx4_en_dev mdev = (struct mlx4_en_dev ) endev_ptr;
	107	struct mlx4_en_priv *priv;
	108
	109	if (!mdev->pndev[port])
	110	return;
	111
	112	priv = netdev_priv(mdev->pndev[port]);
	113	switch (event) {
	114	case MLX4_DEV_EVENT_PORT_UP:
	115	case MLX4_DEV_EVENT_PORT_DOWN:
	116	/* To prevent races, we poll the link state in a separate
	117	task rather than changing it here */
	118	priv->link_state = event;
	119	queue_work(mdev->workqueue, &priv->linkstate_task);
	120	break;
	121
	122	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
	123	mlx4_err(mdev, "Internal error detected, restarting device\n");
	124	break;
	125
	126	default:
	127	mlx4_warn(mdev, "Unhandled event: %d\n", event);
	128	}
	129	}
	130
	131	static void mlx4_en_remove(struct mlx4_dev dev, void endev_ptr)
	132	{
	133	struct mlx4_en_dev *mdev = endev_ptr;
	134	int i;
	135
	136	mutex_lock(&mdev->state_lock);
	137	mdev->device_up = false;
	138	mutex_unlock(&mdev->state_lock);
	139
	140	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
	141	if (mdev->pndev[i])
	142	mlx4_en_destroy_netdev(mdev->pndev[i]);
	143
	144	flush_workqueue(mdev->workqueue);
	145	destroy_workqueue(mdev->workqueue);
	146	mlx4_mr_free(dev, &mdev->mr);
	147	mlx4_uar_free(dev, &mdev->priv_uar);
	148	mlx4_pd_free(dev, mdev->priv_pdn);
	149	kfree(mdev);
	150	}
	151
	152	static void mlx4_en_add(struct mlx4_dev dev)
	153	{
	154	static int mlx4_en_version_printed;
	155	struct mlx4_en_dev *mdev;
	156	int i;
	157	int err;
	158
	159	if (!mlx4_en_version_printed) {
	160	printk(KERN_INFO "%s", mlx4_en_version);
	161	mlx4_en_version_printed++;
	162	}
	163
	164	mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
	165	if (!mdev) {
	166	dev_err(&dev->pdev->dev, "Device struct alloc failed, "
167	"aborting.\n");
168	err = -ENOMEM;
169	goto err_free_res;
170	}
171
172	if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
173	goto err_free_dev;
174
175	if (mlx4_uar_alloc(dev, &mdev->priv_uar))
176	goto err_pd;
177
178	mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
179	if (!mdev->uar_map)
180	goto err_uar;
181	spin_lock_init(&mdev->uar_lock);
182
183	mdev->dev = dev;
184	mdev->dma_device = &(dev->pdev->dev);
185	mdev->pdev = dev->pdev;
186	mdev->device_up = false;
187
188	mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
189	if (!mdev->LSO_support)
190	mlx4_warn(mdev, "LSO not supported, please upgrade to later "
191	"FW version to enable LSO\n");
192
193	if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
194	MLX4_PERM_LOCAL_WRITE \| MLX4_PERM_LOCAL_READ,
195	0, 0, &mdev->mr)) {
196	mlx4_err(mdev, "Failed allocating memory region\n");
197	goto err_uar;
198	}
199	if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
200	mlx4_err(mdev, "Failed enabling memory region\n");
201	goto err_mr;
202	}
203
204	/* Build device profile according to supplied module parameters */
205	err = mlx4_en_get_profile(mdev);
206	if (err) {
207	mlx4_err(mdev, "Bad module parameters, aborting.\n");
208	goto err_mr;
209	}
210
211	/* Configure wich ports to start according to module parameters */
212	mdev->port_cnt = 0;
213	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
214	mdev->port_cnt++;
215
216	/* If we did not receive an explicit number of Rx rings, default to
217	* the number of completion vectors populated by the mlx4_core */
218	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
219	mlx4_info(mdev, "Using %d tx rings for port:%d\n",
220	mdev->profile.prof[i].tx_ring_num, i);
b6b912e0 YP	221	mdev->profile.prof[i].rx_ring_num = min_t(int,
	222	roundup_pow_of_two(dev->caps.num_comp_vectors),
	223	MAX_RX_RINGS);
2d6a7b75 YP	224	mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
2d6a7b75 YP	225	mdev->profile.prof[i].rx_ring_num, i);
c27a02cd YP	226	}
	227
	228	/* Create our own workqueue for reset/multicast tasks
	229	* Note: we cannot use the shared workqueue because of deadlocks caused
	230	* by the rtnl lock */
	231	mdev->workqueue = create_singlethread_workqueue("mlx4_en");
	232	if (!mdev->workqueue) {
	233	err = -ENOMEM;
1a44cc37	234	goto err_mr;
c27a02cd YP	235	}
	236
	237	/* At this stage all non-port specific tasks are complete:
	238	* mark the card state as up */
	239	mutex_init(&mdev->state_lock);
	240	mdev->device_up = true;
	241
	242	/* Setup ports */
	243
	244	/* Create a netdev for each port */
	245	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
	246	mlx4_info(mdev, "Activating port:%d\n", i);
3c2fa83f	247	if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
c27a02cd	248	mdev->pndev[i] = NULL;
c27a02cd YP	249	}
	250	return mdev;
	251
c27a02cd YP	252	err_mr:
	253	mlx4_mr_free(dev, &mdev->mr);
	254	err_uar:
	255	mlx4_uar_free(dev, &mdev->priv_uar);
	256	err_pd:
	257	mlx4_pd_free(dev, mdev->priv_pdn);
	258	err_free_dev:
	259	kfree(mdev);
	260	err_free_res:
	261	return NULL;
	262	}
	263
	264	static struct mlx4_interface mlx4_en_interface = {
	265	.add = mlx4_en_add,
	266	.remove = mlx4_en_remove,
	267	.event = mlx4_en_event,
	268	};
	269
	270	static int __init mlx4_en_init(void)
	271	{
	272	return mlx4_register_interface(&mlx4_en_interface);
	273	}
	274
	275	static void __exit mlx4_en_cleanup(void)
	276	{
	277	mlx4_unregister_interface(&mlx4_en_interface);
	278	}
	279
	280	module_init(mlx4_en_init);
	281	module_exit(mlx4_en_cleanup);
	282