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>
39 #include <linux/mlx4/driver.h>
40 #include <linux/mlx4/device.h>
41 #include <linux/mlx4/cmd.h>
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")");
50 static const char mlx4_en_version[] =
51 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
52 DRV_VERSION " (" DRV_RELDATE ")\n";
54 #define MLX4_EN_PARM_INT(X, def_val, desc) \
55 static unsigned int X = def_val;\
56 module_param(X , uint, 0444); \
57 MODULE_PARM_DESC(X, desc);
61 * Device scope module parameters
65 /* Use a XOR rathern than Toeplitz hash function for RSS */
66 MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS");
68 /* RSS hash type mask - default to <saddr, daddr, sport, dport> */
69 MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask");
71 /* Number of LRO sessions per Rx ring (rounded up to a power of two) */
72 MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS,
73 "Number of LRO sessions per ring or disabled (0)");
75 /* Priority pausing */
76 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
77 " Per priority bit mask");
78 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
79 " Per priority bit mask");
81 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
83 struct mlx4_en_profile *params = &mdev->profile;
86 params->rss_xor = (rss_xor != 0);
87 params->rss_mask = rss_mask & 0x1f;
88 params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS);
89 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
90 params->prof[i].rx_pause = 1;
91 params->prof[i].rx_ppp = pfcrx;
92 params->prof[i].tx_pause = 1;
93 params->prof[i].tx_ppp = pfctx;
94 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
95 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
96 params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
97 (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
103 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
104 enum mlx4_dev_event event, int port)
106 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
107 struct mlx4_en_priv *priv;
109 if (!mdev->pndev[port])
112 priv = netdev_priv(mdev->pndev[port]);
114 case MLX4_DEV_EVENT_PORT_UP:
115 case MLX4_DEV_EVENT_PORT_DOWN:
116 /* To prevent races, we poll the link state in a separate
117 task rather than changing it here */
118 priv->link_state = event;
119 queue_work(mdev->workqueue, &priv->linkstate_task);
122 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
123 mlx4_err(mdev, "Internal error detected, restarting device\n");
127 mlx4_warn(mdev, "Unhandled event: %d\n", event);
131 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
133 struct mlx4_en_dev *mdev = endev_ptr;
136 mutex_lock(&mdev->state_lock);
137 mdev->device_up = false;
138 mutex_unlock(&mdev->state_lock);
140 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
142 mlx4_en_destroy_netdev(mdev->pndev[i]);
144 flush_workqueue(mdev->workqueue);
145 destroy_workqueue(mdev->workqueue);
146 mlx4_mr_free(dev, &mdev->mr);
147 mlx4_uar_free(dev, &mdev->priv_uar);
148 mlx4_pd_free(dev, mdev->priv_pdn);
152 static void *mlx4_en_add(struct mlx4_dev *dev)
154 static int mlx4_en_version_printed;
155 struct mlx4_en_dev *mdev;
159 if (!mlx4_en_version_printed) {
160 printk(KERN_INFO "%s", mlx4_en_version);
161 mlx4_en_version_printed++;
164 mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
166 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
172 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
175 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
178 mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
181 spin_lock_init(&mdev->uar_lock);
184 mdev->dma_device = &(dev->pdev->dev);
185 mdev->pdev = dev->pdev;
186 mdev->device_up = false;
188 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
189 if (!mdev->LSO_support)
190 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
191 "FW version to enable LSO\n");
193 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
194 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
196 mlx4_err(mdev, "Failed allocating memory region\n");
199 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
200 mlx4_err(mdev, "Failed enabling memory region\n");
204 /* Build device profile according to supplied module parameters */
205 err = mlx4_en_get_profile(mdev);
207 mlx4_err(mdev, "Bad module parameters, aborting.\n");
211 /* Configure wich ports to start according to module parameters */
213 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
216 /* If we did not receive an explicit number of Rx rings, default to
217 * the number of completion vectors populated by the mlx4_core */
218 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
219 mlx4_info(mdev, "Using %d tx rings for port:%d\n",
220 mdev->profile.prof[i].tx_ring_num, i);
221 mdev->profile.prof[i].rx_ring_num =
222 min_t(int, dev->caps.num_comp_vectors, MAX_RX_RINGS);
223 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
224 mdev->profile.prof[i].rx_ring_num, i);
227 /* Create our own workqueue for reset/multicast tasks
228 * Note: we cannot use the shared workqueue because of deadlocks caused
229 * by the rtnl lock */
230 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
231 if (!mdev->workqueue) {
236 /* At this stage all non-port specific tasks are complete:
237 * mark the card state as up */
238 mutex_init(&mdev->state_lock);
239 mdev->device_up = true;
243 /* Create a netdev for each port */
244 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
245 mlx4_info(mdev, "Activating port:%d\n", i);
246 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
247 mdev->pndev[i] = NULL;
252 mlx4_mr_free(dev, &mdev->mr);
254 mlx4_uar_free(dev, &mdev->priv_uar);
256 mlx4_pd_free(dev, mdev->priv_pdn);
263 static struct mlx4_interface mlx4_en_interface = {
265 .remove = mlx4_en_remove,
266 .event = mlx4_en_event,
269 static int __init mlx4_en_init(void)
271 return mlx4_register_interface(&mlx4_en_interface);
274 static void __exit mlx4_en_cleanup(void)
276 mlx4_unregister_interface(&mlx4_en_interface);
279 module_init(mlx4_en_init);
280 module_exit(mlx4_en_cleanup);