2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
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>
40 #include <linux/mlx4/driver.h>
41 #include <linux/mlx4/device.h>
42 #include <linux/mlx4/cmd.h>
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 " ("DRV_RELDATE")");
51 static const char mlx4_en_version[] =
52 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
53 DRV_VERSION " (" DRV_RELDATE ")\n";
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);
62 * Device scope module parameters
66 /* Enable RSS TCP traffic */
67 MLX4_EN_PARM_INT(tcp_rss, 1,
68 "Enable RSS for incomming TCP traffic or disabled (0)");
69 /* Enable RSS UDP traffic */
70 MLX4_EN_PARM_INT(udp_rss, 1,
71 "Enable RSS for incomming UDP traffic or disabled (0)");
73 /* Priority pausing */
74 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
75 " Per priority bit mask");
76 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
77 " Per priority bit mask");
79 int en_print(const char *level, const struct mlx4_en_priv *priv,
80 const char *format, ...)
86 va_start(args, format);
91 i = printk("%s%s: %s: %pV",
92 level, DRV_NAME, priv->dev->name, &vaf);
94 i = printk("%s%s: %s: Port %d: %pV",
95 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
102 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
104 struct mlx4_en_profile *params = &mdev->profile;
107 params->tcp_rss = tcp_rss;
108 params->udp_rss = udp_rss;
109 if (params->udp_rss && !mdev->dev->caps.udp_rss) {
110 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
113 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
114 params->prof[i].rx_pause = 1;
115 params->prof[i].rx_ppp = pfcrx;
116 params->prof[i].tx_pause = 1;
117 params->prof[i].tx_ppp = pfctx;
118 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
119 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
120 params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
121 (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
127 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
129 struct mlx4_en_dev *endev = ctx;
131 return endev->pndev[port];
134 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
135 enum mlx4_dev_event event, int port)
137 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
138 struct mlx4_en_priv *priv;
140 if (!mdev->pndev[port])
143 priv = netdev_priv(mdev->pndev[port]);
145 case MLX4_DEV_EVENT_PORT_UP:
146 case MLX4_DEV_EVENT_PORT_DOWN:
147 /* To prevent races, we poll the link state in a separate
148 task rather than changing it here */
149 priv->link_state = event;
150 queue_work(mdev->workqueue, &priv->linkstate_task);
153 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
154 mlx4_err(mdev, "Internal error detected, restarting device\n");
158 mlx4_warn(mdev, "Unhandled event: %d\n", event);
162 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
164 struct mlx4_en_dev *mdev = endev_ptr;
167 mutex_lock(&mdev->state_lock);
168 mdev->device_up = false;
169 mutex_unlock(&mdev->state_lock);
171 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
173 mlx4_en_destroy_netdev(mdev->pndev[i]);
175 flush_workqueue(mdev->workqueue);
176 destroy_workqueue(mdev->workqueue);
177 mlx4_mr_free(dev, &mdev->mr);
178 mlx4_uar_free(dev, &mdev->priv_uar);
179 mlx4_pd_free(dev, mdev->priv_pdn);
183 static void *mlx4_en_add(struct mlx4_dev *dev)
185 struct mlx4_en_dev *mdev;
189 printk_once(KERN_INFO "%s", mlx4_en_version);
191 mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
193 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
199 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
202 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
205 mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
208 spin_lock_init(&mdev->uar_lock);
211 mdev->dma_device = &(dev->pdev->dev);
212 mdev->pdev = dev->pdev;
213 mdev->device_up = false;
215 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
216 if (!mdev->LSO_support)
217 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
218 "FW version to enable LSO\n");
220 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
221 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
223 mlx4_err(mdev, "Failed allocating memory region\n");
226 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
227 mlx4_err(mdev, "Failed enabling memory region\n");
231 /* Build device profile according to supplied module parameters */
232 err = mlx4_en_get_profile(mdev);
234 mlx4_err(mdev, "Bad module parameters, aborting.\n");
238 /* Configure wich ports to start according to module parameters */
240 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
243 /* If we did not receive an explicit number of Rx rings, default to
244 * the number of completion vectors populated by the mlx4_core */
245 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
246 mlx4_info(mdev, "Using %d tx rings for port:%d\n",
247 mdev->profile.prof[i].tx_ring_num, i);
248 mdev->profile.prof[i].rx_ring_num = min_t(int,
249 roundup_pow_of_two(dev->caps.num_comp_vectors),
251 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
252 mdev->profile.prof[i].rx_ring_num, i);
255 /* Create our own workqueue for reset/multicast tasks
256 * Note: we cannot use the shared workqueue because of deadlocks caused
257 * by the rtnl lock */
258 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
259 if (!mdev->workqueue) {
264 /* At this stage all non-port specific tasks are complete:
265 * mark the card state as up */
266 mutex_init(&mdev->state_lock);
267 mdev->device_up = true;
271 /* Create a netdev for each port */
272 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
273 mlx4_info(mdev, "Activating port:%d\n", i);
274 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
275 mdev->pndev[i] = NULL;
280 mlx4_mr_free(dev, &mdev->mr);
282 mlx4_uar_free(dev, &mdev->priv_uar);
284 mlx4_pd_free(dev, mdev->priv_pdn);
291 static struct mlx4_interface mlx4_en_interface = {
293 .remove = mlx4_en_remove,
294 .event = mlx4_en_event,
295 .get_dev = mlx4_en_get_netdev,
296 .protocol = MLX4_PROTOCOL_EN,
299 static int __init mlx4_en_init(void)
301 return mlx4_register_interface(&mlx4_en_interface);
304 static void __exit mlx4_en_cleanup(void)
306 mlx4_unregister_interface(&mlx4_en_interface);
309 module_init(mlx4_en_init);
310 module_exit(mlx4_en_cleanup);