2 * Copyright (c) 2007, 2014 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
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/module.h>
35 #include <linux/delay.h>
36 #include <linux/netdevice.h>
37 #include <linux/slab.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");
49 MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")");
52 static const char mlx4_en_version[] =
53 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
54 DRV_VERSION " (" DRV_RELDATE ")\n";
56 #define MLX4_EN_PARM_INT(X, def_val, desc) \
57 static unsigned int X = def_val;\
58 module_param(X , uint, 0444); \
59 MODULE_PARM_DESC(X, desc);
63 * Device scope module parameters
66 /* Enable RSS UDP traffic */
67 MLX4_EN_PARM_INT(udp_rss, 1,
68 "Enable RSS for incoming UDP traffic");
70 /* Priority pausing */
71 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
72 " Per priority bit mask");
73 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
74 " Per priority bit mask");
76 #define MAX_PFC_TX 0xff
77 #define MAX_PFC_RX 0xff
80 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
82 struct mlx4_en_profile *params = &mdev->profile;
85 params->udp_rss = udp_rss;
86 params->num_tx_rings_p_up = min_t(int, mp_ncpus,
87 MLX4_EN_MAX_TX_RING_P_UP);
88 if (params->udp_rss && !(mdev->dev->caps.flags
89 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
90 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
93 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
94 params->prof[i].rx_pause = 1;
95 params->prof[i].rx_ppp = pfcrx;
96 params->prof[i].tx_pause = 1;
97 params->prof[i].tx_ppp = pfctx;
98 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
99 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
100 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
102 params->prof[i].rss_rings = 0;
108 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
110 struct mlx4_en_dev *endev = ctx;
112 return endev->pndev[port];
115 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
116 enum mlx4_dev_event event, unsigned long port)
118 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
119 struct mlx4_en_priv *priv;
122 case MLX4_DEV_EVENT_PORT_UP:
123 case MLX4_DEV_EVENT_PORT_DOWN:
124 if (!mdev->pndev[port])
126 priv = netdev_priv(mdev->pndev[port]);
127 /* To prevent races, we poll the link state in a separate
128 task rather than changing it here */
129 priv->link_state = event;
130 queue_work(mdev->workqueue, &priv->linkstate_task);
133 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
134 mlx4_err(mdev, "Internal error detected, restarting device\n");
137 case MLX4_DEV_EVENT_SLAVE_INIT:
138 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
141 if (port < 1 || port > dev->caps.num_ports ||
144 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
149 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
151 struct mlx4_en_dev *mdev = endev_ptr;
154 mutex_lock(&mdev->state_lock);
155 mdev->device_up = false;
156 mutex_unlock(&mdev->state_lock);
158 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
160 mlx4_en_destroy_netdev(mdev->pndev[i]);
162 flush_workqueue(mdev->workqueue);
163 destroy_workqueue(mdev->workqueue);
164 ret = mlx4_mr_free(dev, &mdev->mr);
166 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
167 iounmap(mdev->uar_map);
168 mlx4_uar_free(dev, &mdev->priv_uar);
169 mlx4_pd_free(dev, mdev->priv_pdn);
173 static void *mlx4_en_add(struct mlx4_dev *dev)
175 struct mlx4_en_dev *mdev;
179 printk_once(KERN_INFO "%s", mlx4_en_version);
181 mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
183 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
189 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
192 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
195 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
199 spin_lock_init(&mdev->uar_lock);
202 mdev->dma_device = &(dev->pdev->dev);
203 mdev->pdev = dev->pdev;
204 mdev->device_up = false;
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");
211 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
212 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
214 mlx4_err(mdev, "Failed allocating memory region\n");
217 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
218 mlx4_err(mdev, "Failed enabling memory region\n");
222 /* Build device profile according to supplied module parameters */
223 err = mlx4_en_get_profile(mdev);
225 mlx4_err(mdev, "Bad module parameters, aborting.\n");
229 /* Configure which ports to start according to module parameters */
231 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
235 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
236 if (!dev->caps.comp_pool) {
237 mdev->profile.prof[i].rx_ring_num =
238 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
240 dev->caps.num_comp_vectors,
243 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
244 min_t(int, dev->caps.comp_pool /
245 dev->caps.num_ports, MAX_MSIX_P_PORT));
249 /* Create our own workqueue for reset/multicast tasks
250 * Note: we cannot use the shared workqueue because of deadlocks caused
251 * by the rtnl lock */
252 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
253 if (!mdev->workqueue) {
258 /* At this stage all non-port specific tasks are complete:
259 * mark the card state as up */
260 mutex_init(&mdev->state_lock);
261 mdev->device_up = true;
265 /* Create a netdev for each port */
266 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
267 mlx4_info(mdev, "Activating port:%d\n", i);
268 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
269 mdev->pndev[i] = NULL;
275 err = mlx4_mr_free(dev, &mdev->mr);
277 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
280 iounmap(mdev->uar_map);
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_PROT_ETH,
299 static void mlx4_en_verify_params(void)
301 if (pfctx > MAX_PFC_TX) {
302 pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - "
303 "should be in range 0-0x%x, will be changed to default (0)\n",
308 if (pfcrx > MAX_PFC_RX) {
309 pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - "
310 "should be in range 0-0x%x, will be changed to default (0)\n",
317 static int __init mlx4_en_init(void)
319 mlx4_en_verify_params();
321 #ifdef CONFIG_DEBUG_FS
323 err = mlx4_en_register_debugfs();
325 pr_err(KERN_ERR "Failed to register debugfs\n");
327 return mlx4_register_interface(&mlx4_en_interface);
330 static void __exit mlx4_en_cleanup(void)
332 mlx4_unregister_interface(&mlx4_en_interface);
333 #ifdef CONFIG_DEBUG_FS
334 mlx4_en_unregister_debugfs();
338 module_init(mlx4_en_init);
339 module_exit(mlx4_en_cleanup);
342 mlxen_evhand(module_t mod, int event, void *arg)
346 static moduledata_t mlxen_mod = {
348 .evhand = mlxen_evhand,
350 DECLARE_MODULE(mlxen, mlxen_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY);
351 MODULE_DEPEND(mlxen, mlx4, 1, 1, 1);
352 MODULE_DEPEND(mlxen, linuxapi, 1, 1, 1);