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
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
mlx4_en_event(struct mlx4_dev * dev,void * endev_ptr,enum mlx4_dev_event event,int port)54 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
55 enum mlx4_dev_event event, int port)
56 {
57 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
58 struct mlx4_en_priv *priv;
59
60 if (!mdev->pndev[port])
61 return;
62
63 priv = netdev_priv(mdev->pndev[port]);
64 switch (event) {
65 case MLX4_DEV_EVENT_PORT_UP:
66 case MLX4_DEV_EVENT_PORT_DOWN:
67 /* To prevent races, we poll the link state in a separate
68 task rather than changing it here */
69 priv->link_state = event;
70 queue_work(mdev->workqueue, &priv->linkstate_task);
71 break;
72
73 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
74 mlx4_err(mdev, "Internal error detected, restarting device\n");
75 break;
76
77 default:
78 mlx4_warn(mdev, "Unhandled event: %d\n", event);
79 }
80 }
81
mlx4_en_remove(struct mlx4_dev * dev,void * endev_ptr)82 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
83 {
84 struct mlx4_en_dev *mdev = endev_ptr;
85 int i;
86
87 mutex_lock(&mdev->state_lock);
88 mdev->device_up = false;
89 mutex_unlock(&mdev->state_lock);
90
91 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
92 if (mdev->pndev[i])
93 mlx4_en_destroy_netdev(mdev->pndev[i]);
94
95 flush_workqueue(mdev->workqueue);
96 destroy_workqueue(mdev->workqueue);
97 mlx4_mr_free(dev, &mdev->mr);
98 mlx4_uar_free(dev, &mdev->priv_uar);
99 mlx4_pd_free(dev, mdev->priv_pdn);
100 kfree(mdev);
101 }
102
mlx4_en_add(struct mlx4_dev * dev)103 static void *mlx4_en_add(struct mlx4_dev *dev)
104 {
105 static int mlx4_en_version_printed;
106 struct mlx4_en_dev *mdev;
107 int i;
108 int err;
109
110 if (!mlx4_en_version_printed) {
111 printk(KERN_INFO "%s", mlx4_en_version);
112 mlx4_en_version_printed++;
113 }
114
115 mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
116 if (!mdev) {
117 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
118 "aborting.\n");
119 err = -ENOMEM;
120 goto err_free_res;
121 }
122
123 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
124 goto err_free_dev;
125
126 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
127 goto err_pd;
128
129 mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
130 if (!mdev->uar_map)
131 goto err_uar;
132 spin_lock_init(&mdev->uar_lock);
133
134 mdev->dev = dev;
135 mdev->dma_device = &(dev->pdev->dev);
136 mdev->pdev = dev->pdev;
137 mdev->device_up = false;
138
139 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
140 if (!mdev->LSO_support)
141 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
142 "FW version to enable LSO\n");
143
144 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
145 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
146 0, 0, &mdev->mr)) {
147 mlx4_err(mdev, "Failed allocating memory region\n");
148 goto err_uar;
149 }
150 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
151 mlx4_err(mdev, "Failed enabling memory region\n");
152 goto err_mr;
153 }
154
155 /* Build device profile according to supplied module parameters */
156 err = mlx4_en_get_profile(mdev);
157 if (err) {
158 mlx4_err(mdev, "Bad module parameters, aborting.\n");
159 goto err_mr;
160 }
161
162 /* Configure wich ports to start according to module parameters */
163 mdev->port_cnt = 0;
164 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
165 mdev->port_cnt++;
166
167 /* If we did not receive an explicit number of Rx rings, default to
168 * the number of completion vectors populated by the mlx4_core */
169 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
170 mlx4_info(mdev, "Using %d tx rings for port:%d\n",
171 mdev->profile.prof[i].tx_ring_num, i);
172 mdev->profile.prof[i].rx_ring_num =
173 min_t(int, dev->caps.num_comp_vectors, MAX_RX_RINGS);
174 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
175 mdev->profile.prof[i].rx_ring_num, i);
176 }
177
178 /* Create our own workqueue for reset/multicast tasks
179 * Note: we cannot use the shared workqueue because of deadlocks caused
180 * by the rtnl lock */
181 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
182 if (!mdev->workqueue) {
183 err = -ENOMEM;
184 goto err_close_nic;
185 }
186
187 /* At this stage all non-port specific tasks are complete:
188 * mark the card state as up */
189 mutex_init(&mdev->state_lock);
190 mdev->device_up = true;
191
192 /* Setup ports */
193
194 /* Create a netdev for each port */
195 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
196 mlx4_info(mdev, "Activating port:%d\n", i);
197 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) {
198 mdev->pndev[i] = NULL;
199 goto err_free_netdev;
200 }
201 }
202 return mdev;
203
204
205 err_free_netdev:
206 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
207 if (mdev->pndev[i])
208 mlx4_en_destroy_netdev(mdev->pndev[i]);
209 }
210
211 mutex_lock(&mdev->state_lock);
212 mdev->device_up = false;
213 mutex_unlock(&mdev->state_lock);
214 flush_workqueue(mdev->workqueue);
215
216 /* Stop event queue before we drop down to release shared SW state */
217
218 err_close_nic:
219 destroy_workqueue(mdev->workqueue);
220 err_mr:
221 mlx4_mr_free(dev, &mdev->mr);
222 err_uar:
223 mlx4_uar_free(dev, &mdev->priv_uar);
224 err_pd:
225 mlx4_pd_free(dev, mdev->priv_pdn);
226 err_free_dev:
227 kfree(mdev);
228 err_free_res:
229 return NULL;
230 }
231
232 static struct mlx4_interface mlx4_en_interface = {
233 .add = mlx4_en_add,
234 .remove = mlx4_en_remove,
235 .event = mlx4_en_event,
236 };
237
mlx4_en_init(void)238 static int __init mlx4_en_init(void)
239 {
240 return mlx4_register_interface(&mlx4_en_interface);
241 }
242
mlx4_en_cleanup(void)243 static void __exit mlx4_en_cleanup(void)
244 {
245 mlx4_unregister_interface(&mlx4_en_interface);
246 }
247
248 module_init(mlx4_en_init);
249 module_exit(mlx4_en_cleanup);
250
251