1 /*
2 * Copyright (c) 2007, 2014 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 #define LINUXKPI_PARAM_PREFIX mlx4_
35
36 #include <linux/module.h>
37 #include <linux/delay.h>
38 #include <linux/netdevice.h>
39 #include <linux/slab.h>
40
41 #include <dev/mlx4/driver.h>
42 #include <dev/mlx4/device.h>
43 #include <dev/mlx4/cmd.h>
44
45 #include "en.h"
46
47 /* Mellanox ConnectX HCA Ethernet driver */
48
49 #define MLX4_EN_PARM_INT(X, def_val, desc) \
50 static unsigned int X = def_val;\
51 module_param(X , uint, 0444); \
52 MODULE_PARM_DESC(X, desc);
53
54
55 /*
56 * Device scope module parameters
57 */
58
59 /* Enable RSS UDP traffic */
60 MLX4_EN_PARM_INT(udp_rss, 1,
61 "Enable RSS for incoming UDP traffic or disabled (0)");
62
63 /* Priority pausing */
64 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
65 " Per priority bit mask");
66 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
67 " Per priority bit mask");
68
69 MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
70 "Threshold for using inline data (range: 17-104, default: 104)");
71
72 #define MAX_PFC_TX 0xff
73 #define MAX_PFC_RX 0xff
74
mlx4_en_get_profile(struct mlx4_en_dev * mdev)75 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
76 {
77 struct mlx4_en_profile *params = &mdev->profile;
78 int i;
79
80 params->udp_rss = udp_rss;
81 params->num_tx_rings_p_up = min_t(int, mp_ncpus,
82 MLX4_EN_MAX_TX_RING_P_UP);
83 if (params->udp_rss && !(mdev->dev->caps.flags
84 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
85 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
86 params->udp_rss = 0;
87 }
88 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
89 params->prof[i].rx_pause = 1;
90 params->prof[i].rx_ppp = pfcrx;
91 params->prof[i].tx_pause = 1;
92 params->prof[i].tx_ppp = pfctx;
93 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
94 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
95 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
96 MLX4_EN_NUM_UP;
97 params->prof[i].rss_rings = 0;
98 params->prof[i].inline_thold = inline_thold;
99 }
100
101 return 0;
102 }
103
mlx4_en_get_netdev(struct mlx4_dev * dev,void * ctx,u8 port)104 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
105 {
106 struct mlx4_en_dev *endev = ctx;
107
108 return endev->pndev[port];
109 }
110
mlx4_en_event(struct mlx4_dev * dev,void * endev_ptr,enum mlx4_dev_event event,unsigned long port)111 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
112 enum mlx4_dev_event event, unsigned long port)
113 {
114 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
115 struct mlx4_en_priv *priv;
116
117 switch (event) {
118 case MLX4_DEV_EVENT_PORT_UP:
119 case MLX4_DEV_EVENT_PORT_DOWN:
120 if (!mdev->pndev[port])
121 return;
122 priv = mlx4_netdev_priv(mdev->pndev[port]);
123 /* To prevent races, we poll the link state in a separate
124 task rather than changing it here */
125 priv->link_state = event;
126 queue_work(mdev->workqueue, &priv->linkstate_task);
127 break;
128
129 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
130 mlx4_err(mdev, "Internal error detected, restarting device\n");
131 break;
132
133 case MLX4_DEV_EVENT_SLAVE_INIT:
134 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
135 break;
136 default:
137 if (port < 1 || port > dev->caps.num_ports ||
138 !mdev->pndev[port])
139 return;
140 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
141 (int) port);
142 }
143 }
144
mlx4_en_remove(struct mlx4_dev * dev,void * endev_ptr)145 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
146 {
147 struct mlx4_en_dev *mdev = endev_ptr;
148 int i;
149
150 mutex_lock(&mdev->state_lock);
151 mdev->device_up = false;
152 mutex_unlock(&mdev->state_lock);
153
154 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
155 if (mdev->pndev[i])
156 mlx4_en_destroy_netdev(mdev->pndev[i]);
157
158 flush_workqueue(mdev->workqueue);
159 destroy_workqueue(mdev->workqueue);
160 (void) mlx4_mr_free(dev, &mdev->mr);
161 iounmap(mdev->uar_map);
162 mlx4_uar_free(dev, &mdev->priv_uar);
163 mlx4_pd_free(dev, mdev->priv_pdn);
164 kfree(mdev);
165 }
166
mlx4_en_activate(struct mlx4_dev * dev,void * ctx)167 static void mlx4_en_activate(struct mlx4_dev *dev, void *ctx)
168 {
169 int i;
170 struct mlx4_en_dev *mdev = ctx;
171
172 /* Create a netdev for each port */
173 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
174 mlx4_info(mdev, "Activating port:%d\n", i);
175 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
176 mdev->pndev[i] = NULL;
177 }
178 }
179
mlx4_en_add(struct mlx4_dev * dev)180 static void *mlx4_en_add(struct mlx4_dev *dev)
181 {
182 struct mlx4_en_dev *mdev;
183 int i;
184
185 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
186 if (!mdev)
187 goto err_free_res;
188
189 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
190 goto err_free_dev;
191
192 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
193 goto err_pd;
194
195 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
196 PAGE_SIZE);
197 if (!mdev->uar_map)
198 goto err_uar;
199 spin_lock_init(&mdev->uar_lock);
200
201 mdev->dev = dev;
202 mdev->dma_device = &dev->persist->pdev->dev;
203 mdev->pdev = dev->persist->pdev;
204 mdev->device_up = false;
205
206 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
207 if (!mdev->LSO_support)
208 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
209 "FW version to enable LSO\n");
210
211 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
212 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
213 0, 0, &mdev->mr)) {
214 mlx4_err(mdev, "Failed allocating memory region\n");
215 goto err_map;
216 }
217 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
218 mlx4_err(mdev, "Failed enabling memory region\n");
219 goto err_mr;
220 }
221
222 /* Build device profile according to supplied module parameters */
223 if (mlx4_en_get_profile(mdev)) {
224 mlx4_err(mdev, "Bad module parameters, aborting\n");
225 goto err_mr;
226 }
227
228 /* Configure which ports to start according to module parameters */
229 mdev->port_cnt = 0;
230 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
231 mdev->port_cnt++;
232
233 /* Set default number of RX rings*/
234 mlx4_en_set_num_rx_rings(mdev);
235
236 /* Create our own workqueue for reset/multicast tasks
237 * Note: we cannot use the shared workqueue because of deadlocks caused
238 * by the rtnl lock */
239 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
240 if (!mdev->workqueue)
241 goto err_mr;
242
243 /* At this stage all non-port specific tasks are complete:
244 * mark the card state as up */
245 mutex_init(&mdev->state_lock);
246 mdev->device_up = true;
247
248 return mdev;
249
250 err_mr:
251 (void) mlx4_mr_free(dev, &mdev->mr);
252 err_map:
253 if (mdev->uar_map)
254 iounmap(mdev->uar_map);
255 err_uar:
256 mlx4_uar_free(dev, &mdev->priv_uar);
257 err_pd:
258 mlx4_pd_free(dev, mdev->priv_pdn);
259 err_free_dev:
260 kfree(mdev);
261 err_free_res:
262 return NULL;
263 }
264
265 static struct mlx4_interface mlx4_en_interface = {
266 .add = mlx4_en_add,
267 .remove = mlx4_en_remove,
268 .event = mlx4_en_event,
269 .get_dev = mlx4_en_get_netdev,
270 .protocol = MLX4_PROT_ETH,
271 .activate = mlx4_en_activate,
272 };
273
mlx4_en_verify_params(void)274 static void mlx4_en_verify_params(void)
275 {
276 if (pfctx > MAX_PFC_TX) {
277 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",
278 pfctx, MAX_PFC_TX);
279 pfctx = 0;
280 }
281
282 if (pfcrx > MAX_PFC_RX) {
283 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",
284 pfcrx, MAX_PFC_RX);
285 pfcrx = 0;
286 }
287
288 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
289 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
290 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
291 inline_thold = MAX_INLINE;
292 }
293 }
294
mlx4_en_init(void)295 static int __init mlx4_en_init(void)
296 {
297 mlx4_en_verify_params();
298
299 return mlx4_register_interface(&mlx4_en_interface);
300 }
301
mlx4_en_cleanup(void)302 static void __exit mlx4_en_cleanup(void)
303 {
304 mlx4_unregister_interface(&mlx4_en_interface);
305 }
306
307 module_init_order(mlx4_en_init, SI_ORDER_SIXTH);
308 module_exit_order(mlx4_en_cleanup, SI_ORDER_SIXTH);
309
310 static int
mlx4en_evhand(module_t mod,int event,void * arg)311 mlx4en_evhand(module_t mod, int event, void *arg)
312 {
313 return (0);
314 }
315 static moduledata_t mlx4en_mod = {
316 .name = "mlx4en",
317 .evhand = mlx4en_evhand,
318 };
319 DECLARE_MODULE(mlx4en, mlx4en_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY);
320 MODULE_DEPEND(mlx4en, mlx4, 1, 1, 1);
321 MODULE_DEPEND(mlx4en, linuxkpi, 1, 1, 1);
322