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/slab.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
46MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");
47MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");
48MODULE_LICENSE("Dual BSD/GPL");
49MODULE_VERSION(DRV_VERSION);
50
51static const char mlx4_en_version[] =
52	DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
53	DRV_VERSION "\n";
54
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
65/* Enable RSS UDP traffic */
66MLX4_EN_PARM_INT(udp_rss, 1,
67		 "Enable RSS for incoming UDP traffic or disabled (0)");
68
69/* Priority pausing */
70MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
71			   " Per priority bit mask");
72MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
73			   " Per priority bit mask");
74
75MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
76		 "Threshold for using inline data (range: 17-104, default: 104)");
77
78#define MAX_PFC_TX     0xff
79#define MAX_PFC_RX     0xff
80
81void en_print(const char *level, const struct mlx4_en_priv *priv,
82	      const char *format, ...)
83{
84	va_list args;
85	struct va_format vaf;
86
87	va_start(args, format);
88
89	vaf.fmt = format;
90	vaf.va = &args;
91	if (priv->registered)
92		printk("%s%s: %s: %pV",
93		       level, DRV_NAME, priv->dev->name, &vaf);
94	else
95		printk("%s%s: %s: Port %d: %pV",
96		       level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
97		       priv->port, &vaf);
98	va_end(args);
99}
100
101void mlx4_en_update_loopback_state(struct net_device *dev,
102				   netdev_features_t features)
103{
104	struct mlx4_en_priv *priv = netdev_priv(dev);
105
106	if (features & NETIF_F_LOOPBACK)
107		priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
108	else
109		priv->ctrl_flags &= cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
110
111	priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
112			MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
113
114	/* Drop the packet if SRIOV is not enabled
115	 * and not performing the selftest or flb disabled
116	 */
117	if (mlx4_is_mfunc(priv->mdev->dev) &&
118	    !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
119		priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
120
121	/* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
122	 * is requested
123	 */
124	if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
125		priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
126
127	mutex_lock(&priv->mdev->state_lock);
128	if ((priv->mdev->dev->caps.flags2 &
129	     MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB) &&
130	    priv->rss_map.indir_qp && priv->rss_map.indir_qp->qpn) {
131		int i;
132		int err = 0;
133		int loopback = !!(features & NETIF_F_LOOPBACK);
134
135		for (i = 0; i < priv->rx_ring_num; i++) {
136			int ret;
137
138			ret = mlx4_en_change_mcast_lb(priv,
139						      &priv->rss_map.qps[i],
140						      loopback);
141			if (!err)
142				err = ret;
143		}
144		if (err)
145			mlx4_warn(priv->mdev, "failed to change mcast loopback\n");
146	}
147	mutex_unlock(&priv->mdev->state_lock);
148}
149
150static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)
151{
152	struct mlx4_en_profile *params = &mdev->profile;
153	int i;
154
155	params->udp_rss = udp_rss;
156	params->max_num_tx_rings_p_up = mlx4_low_memory_profile() ?
157		MLX4_EN_MIN_TX_RING_P_UP :
158		min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);
159
160	if (params->udp_rss && !(mdev->dev->caps.flags
161					& MLX4_DEV_CAP_FLAG_UDP_RSS)) {
162		mlx4_warn(mdev, "UDP RSS is not supported on this device\n");
163		params->udp_rss = 0;
164	}
165	for (i = 1; i <= MLX4_MAX_PORTS; i++) {
166		params->prof[i].rx_pause = !(pfcrx || pfctx);
167		params->prof[i].rx_ppp = pfcrx;
168		params->prof[i].tx_pause = !(pfcrx || pfctx);
169		params->prof[i].tx_ppp = pfctx;
170		if (mlx4_low_memory_profile()) {
171			params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE;
172			params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE;
173		} else {
174			params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
175			params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
176		}
177		params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;
178		params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;
179		params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *
180			params->prof[i].num_up;
181		params->prof[i].rss_rings = 0;
182		params->prof[i].inline_thold = inline_thold;
183	}
184}
185
186static int mlx4_en_event(struct notifier_block *this, unsigned long event,
187			 void *param)
188{
189	struct mlx4_en_dev *mdev =
190		container_of(this, struct mlx4_en_dev, mlx_nb);
191	struct mlx4_dev *dev = mdev->dev;
192	struct mlx4_en_priv *priv;
193	int port;
194
195	switch (event) {
196	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
197	case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
198	case MLX4_DEV_EVENT_SLAVE_INIT:
199	case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
200		break;
201	default:
202		port = *(int *)param;
203		break;
204	}
205
206	switch (event) {
207	case MLX4_DEV_EVENT_PORT_UP:
208	case MLX4_DEV_EVENT_PORT_DOWN:
209		if (!mdev->pndev[port])
210			return NOTIFY_DONE;
211		priv = netdev_priv(mdev->pndev[port]);
212		/* To prevent races, we poll the link state in a separate
213		  task rather than changing it here */
214		priv->link_state = event;
215		queue_work(mdev->workqueue, &priv->linkstate_task);
216		break;
217
218	case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
219		mlx4_err(mdev, "Internal error detected, restarting device\n");
220		break;
221
222	case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
223	case MLX4_DEV_EVENT_SLAVE_INIT:
224	case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
225		break;
226	default:
227		if (port < 1 || port > dev->caps.num_ports ||
228		    !mdev->pndev[port])
229			return NOTIFY_DONE;
230		mlx4_warn(mdev, "Unhandled event %d for port %d\n", (int)event,
231			  port);
232	}
233
234	return NOTIFY_DONE;
235}
236
237static void mlx4_en_remove(struct auxiliary_device *adev)
238{
239	struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);
240	struct mlx4_dev *dev = madev->mdev;
241	struct mlx4_en_dev *mdev = auxiliary_get_drvdata(adev);
242	int i;
243
244	mlx4_unregister_event_notifier(dev, &mdev->mlx_nb);
245
246	mutex_lock(&mdev->state_lock);
247	mdev->device_up = false;
248	mutex_unlock(&mdev->state_lock);
249
250	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
251		if (mdev->pndev[i])
252			mlx4_en_destroy_netdev(mdev->pndev[i]);
253
254	destroy_workqueue(mdev->workqueue);
255	(void) mlx4_mr_free(dev, &mdev->mr);
256	iounmap(mdev->uar_map);
257	mlx4_uar_free(dev, &mdev->priv_uar);
258	mlx4_pd_free(dev, mdev->priv_pdn);
259	if (mdev->netdev_nb.notifier_call)
260		unregister_netdevice_notifier(&mdev->netdev_nb);
261	kfree(mdev);
262}
263
264static int mlx4_en_probe(struct auxiliary_device *adev,
265			 const struct auxiliary_device_id *id)
266{
267	struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);
268	struct mlx4_dev *dev = madev->mdev;
269	struct mlx4_en_dev *mdev;
270	int err, i;
271
272	printk_once(KERN_INFO "%s", mlx4_en_version);
273
274	mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
275	if (!mdev) {
276		err = -ENOMEM;
277		goto err_free_res;
278	}
279
280	err = mlx4_pd_alloc(dev, &mdev->priv_pdn);
281	if (err)
282		goto err_free_dev;
283
284	err = mlx4_uar_alloc(dev, &mdev->priv_uar);
285	if (err)
286		goto err_pd;
287
288	mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
289				PAGE_SIZE);
290	if (!mdev->uar_map) {
291		err = -ENOMEM;
292		goto err_uar;
293	}
294	spin_lock_init(&mdev->uar_lock);
295
296	mdev->dev = dev;
297	mdev->dma_device = &dev->persist->pdev->dev;
298	mdev->pdev = dev->persist->pdev;
299	mdev->device_up = false;
300
301	mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
302	if (!mdev->LSO_support)
303		mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
304
305	err = mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
306			    MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 0, 0,
307			    &mdev->mr);
308	if (err) {
309		mlx4_err(mdev, "Failed allocating memory region\n");
310		goto err_map;
311	}
312	err = mlx4_mr_enable(mdev->dev, &mdev->mr);
313	if (err) {
314		mlx4_err(mdev, "Failed enabling memory region\n");
315		goto err_mr;
316	}
317
318	/* Build device profile according to supplied module parameters */
319	mlx4_en_get_profile(mdev);
320
321	/* Configure which ports to start according to module parameters */
322	mdev->port_cnt = 0;
323	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
324		mdev->port_cnt++;
325
326	/* Set default number of RX rings*/
327	mlx4_en_set_num_rx_rings(mdev);
328
329	/* Create our own workqueue for reset/multicast tasks
330	 * Note: we cannot use the shared workqueue because of deadlocks caused
331	 *       by the rtnl lock */
332	mdev->workqueue = create_singlethread_workqueue("mlx4_en");
333	if (!mdev->workqueue) {
334		err = -ENOMEM;
335		goto err_mr;
336	}
337
338	/* At this stage all non-port specific tasks are complete:
339	 * mark the card state as up */
340	mutex_init(&mdev->state_lock);
341	mdev->device_up = true;
342
343	/* register mlx4 core notifier */
344	mdev->mlx_nb.notifier_call = mlx4_en_event;
345	err = mlx4_register_event_notifier(dev, &mdev->mlx_nb);
346	WARN(err, "failed to register mlx4 event notifier (%d)", err);
347
348	/* Setup ports */
349
350	/* Create a netdev for each port */
351	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
352		mlx4_info(mdev, "Activating port:%d\n", i);
353		if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
354			mdev->pndev[i] = NULL;
355	}
356
357	/* register netdev notifier */
358	mdev->netdev_nb.notifier_call = mlx4_en_netdev_event;
359	if (register_netdevice_notifier(&mdev->netdev_nb)) {
360		mdev->netdev_nb.notifier_call = NULL;
361		mlx4_err(mdev, "Failed to create netdev notifier\n");
362	}
363
364	auxiliary_set_drvdata(adev, mdev);
365	return 0;
366
367err_mr:
368	(void) mlx4_mr_free(dev, &mdev->mr);
369err_map:
370	if (mdev->uar_map)
371		iounmap(mdev->uar_map);
372err_uar:
373	mlx4_uar_free(dev, &mdev->priv_uar);
374err_pd:
375	mlx4_pd_free(dev, mdev->priv_pdn);
376err_free_dev:
377	kfree(mdev);
378err_free_res:
379	return err;
380}
381
382static const struct auxiliary_device_id mlx4_en_id_table[] = {
383	{ .name = MLX4_ADEV_NAME ".eth" },
384	{},
385};
386
387MODULE_DEVICE_TABLE(auxiliary, mlx4_en_id_table);
388
389static struct mlx4_adrv mlx4_en_adrv = {
390	.adrv = {
391		.name	= "eth",
392		.probe	= mlx4_en_probe,
393		.remove	= mlx4_en_remove,
394		.id_table = mlx4_en_id_table,
395	},
396	.protocol	= MLX4_PROT_ETH,
397};
398
399static void mlx4_en_verify_params(void)
400{
401	if (pfctx > MAX_PFC_TX) {
402		pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
403			pfctx, MAX_PFC_TX);
404		pfctx = 0;
405	}
406
407	if (pfcrx > MAX_PFC_RX) {
408		pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
409			pfcrx, MAX_PFC_RX);
410		pfcrx = 0;
411	}
412
413	if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
414		pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
415			inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
416		inline_thold = MAX_INLINE;
417	}
418}
419
420static int __init mlx4_en_init(void)
421{
422	mlx4_en_verify_params();
423	mlx4_en_init_ptys2ethtool_map();
424
425	return mlx4_register_auxiliary_driver(&mlx4_en_adrv);
426}
427
428static void __exit mlx4_en_cleanup(void)
429{
430	mlx4_unregister_auxiliary_driver(&mlx4_en_adrv);
431}
432
433module_init(mlx4_en_init);
434module_exit(mlx4_en_cleanup);
435
436