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
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);
50
51 static 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 */
66 MLX4_EN_PARM_INT(udp_rss, 1,
67 "Enable RSS for incoming UDP traffic or disabled (0)");
68
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
75 MLX4_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
en_print(const char * level,const struct mlx4_en_priv * priv,const char * format,...)81 void 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
mlx4_en_update_loopback_state(struct net_device * dev,netdev_features_t features)101 void 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
mlx4_en_get_profile(struct mlx4_en_dev * mdev)150 static 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 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
171 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
172 params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;
173 params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;
174 params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *
175 params->prof[i].num_up;
176 params->prof[i].rss_rings = 0;
177 params->prof[i].inline_thold = inline_thold;
178 }
179 }
180
mlx4_en_get_netdev(struct mlx4_dev * dev,void * ctx,u8 port)181 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
182 {
183 struct mlx4_en_dev *endev = ctx;
184
185 return endev->pndev[port];
186 }
187
mlx4_en_event(struct mlx4_dev * dev,void * endev_ptr,enum mlx4_dev_event event,unsigned long port)188 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
189 enum mlx4_dev_event event, unsigned long port)
190 {
191 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
192 struct mlx4_en_priv *priv;
193
194 switch (event) {
195 case MLX4_DEV_EVENT_PORT_UP:
196 case MLX4_DEV_EVENT_PORT_DOWN:
197 if (!mdev->pndev[port])
198 return;
199 priv = netdev_priv(mdev->pndev[port]);
200 /* To prevent races, we poll the link state in a separate
201 task rather than changing it here */
202 priv->link_state = event;
203 queue_work(mdev->workqueue, &priv->linkstate_task);
204 break;
205
206 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
207 mlx4_err(mdev, "Internal error detected, restarting device\n");
208 break;
209
210 case MLX4_DEV_EVENT_SLAVE_INIT:
211 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
212 break;
213 default:
214 if (port < 1 || port > dev->caps.num_ports ||
215 !mdev->pndev[port])
216 return;
217 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
218 (int) port);
219 }
220 }
221
mlx4_en_remove(struct mlx4_dev * dev,void * endev_ptr)222 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
223 {
224 struct mlx4_en_dev *mdev = endev_ptr;
225 int i;
226
227 mutex_lock(&mdev->state_lock);
228 mdev->device_up = false;
229 mutex_unlock(&mdev->state_lock);
230
231 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
232 if (mdev->pndev[i])
233 mlx4_en_destroy_netdev(mdev->pndev[i]);
234
235 flush_workqueue(mdev->workqueue);
236 destroy_workqueue(mdev->workqueue);
237 (void) mlx4_mr_free(dev, &mdev->mr);
238 iounmap(mdev->uar_map);
239 mlx4_uar_free(dev, &mdev->priv_uar);
240 mlx4_pd_free(dev, mdev->priv_pdn);
241 if (mdev->nb.notifier_call)
242 unregister_netdevice_notifier(&mdev->nb);
243 kfree(mdev);
244 }
245
mlx4_en_activate(struct mlx4_dev * dev,void * ctx)246 static void mlx4_en_activate(struct mlx4_dev *dev, void *ctx)
247 {
248 int i;
249 struct mlx4_en_dev *mdev = ctx;
250
251 /* Create a netdev for each port */
252 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
253 mlx4_info(mdev, "Activating port:%d\n", i);
254 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
255 mdev->pndev[i] = NULL;
256 }
257
258 /* register notifier */
259 mdev->nb.notifier_call = mlx4_en_netdev_event;
260 if (register_netdevice_notifier(&mdev->nb)) {
261 mdev->nb.notifier_call = NULL;
262 mlx4_err(mdev, "Failed to create notifier\n");
263 }
264 }
265
mlx4_en_add(struct mlx4_dev * dev)266 static void *mlx4_en_add(struct mlx4_dev *dev)
267 {
268 struct mlx4_en_dev *mdev;
269 int i;
270
271 printk_once(KERN_INFO "%s", mlx4_en_version);
272
273 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
274 if (!mdev)
275 goto err_free_res;
276
277 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
278 goto err_free_dev;
279
280 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
281 goto err_pd;
282
283 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
284 PAGE_SIZE);
285 if (!mdev->uar_map)
286 goto err_uar;
287 spin_lock_init(&mdev->uar_lock);
288
289 mdev->dev = dev;
290 mdev->dma_device = &dev->persist->pdev->dev;
291 mdev->pdev = dev->persist->pdev;
292 mdev->device_up = false;
293
294 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
295 if (!mdev->LSO_support)
296 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
297
298 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
299 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
300 0, 0, &mdev->mr)) {
301 mlx4_err(mdev, "Failed allocating memory region\n");
302 goto err_map;
303 }
304 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
305 mlx4_err(mdev, "Failed enabling memory region\n");
306 goto err_mr;
307 }
308
309 /* Build device profile according to supplied module parameters */
310 mlx4_en_get_profile(mdev);
311
312 /* Configure which ports to start according to module parameters */
313 mdev->port_cnt = 0;
314 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
315 mdev->port_cnt++;
316
317 /* Set default number of RX rings*/
318 mlx4_en_set_num_rx_rings(mdev);
319
320 /* Create our own workqueue for reset/multicast tasks
321 * Note: we cannot use the shared workqueue because of deadlocks caused
322 * by the rtnl lock */
323 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
324 if (!mdev->workqueue)
325 goto err_mr;
326
327 /* At this stage all non-port specific tasks are complete:
328 * mark the card state as up */
329 mutex_init(&mdev->state_lock);
330 mdev->device_up = true;
331
332 return mdev;
333
334 err_mr:
335 (void) mlx4_mr_free(dev, &mdev->mr);
336 err_map:
337 if (mdev->uar_map)
338 iounmap(mdev->uar_map);
339 err_uar:
340 mlx4_uar_free(dev, &mdev->priv_uar);
341 err_pd:
342 mlx4_pd_free(dev, mdev->priv_pdn);
343 err_free_dev:
344 kfree(mdev);
345 err_free_res:
346 return NULL;
347 }
348
349 static struct mlx4_interface mlx4_en_interface = {
350 .add = mlx4_en_add,
351 .remove = mlx4_en_remove,
352 .event = mlx4_en_event,
353 .get_dev = mlx4_en_get_netdev,
354 .protocol = MLX4_PROT_ETH,
355 .activate = mlx4_en_activate,
356 };
357
mlx4_en_verify_params(void)358 static void mlx4_en_verify_params(void)
359 {
360 if (pfctx > MAX_PFC_TX) {
361 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",
362 pfctx, MAX_PFC_TX);
363 pfctx = 0;
364 }
365
366 if (pfcrx > MAX_PFC_RX) {
367 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",
368 pfcrx, MAX_PFC_RX);
369 pfcrx = 0;
370 }
371
372 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
373 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
374 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
375 inline_thold = MAX_INLINE;
376 }
377 }
378
mlx4_en_init(void)379 static int __init mlx4_en_init(void)
380 {
381 mlx4_en_verify_params();
382 mlx4_en_init_ptys2ethtool_map();
383
384 return mlx4_register_interface(&mlx4_en_interface);
385 }
386
mlx4_en_cleanup(void)387 static void __exit mlx4_en_cleanup(void)
388 {
389 mlx4_unregister_interface(&mlx4_en_interface);
390 }
391
392 module_init(mlx4_en_init);
393 module_exit(mlx4_en_cleanup);
394
395
