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
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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");
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
64 /* Enable RSS UDP traffic */
65 MLX4_EN_PARM_INT(udp_rss, 1,
66 "Enable RSS for incoming UDP traffic");
68 /* Priority pausing */
69 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
70 " Per priority bit mask");
71 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
72 " Per priority bit mask");
74 #define MAX_PFC_TX 0xff
75 #define MAX_PFC_RX 0xff
78 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
80 struct mlx4_en_profile *params = &mdev->profile;
83 params->udp_rss = udp_rss;
84 params->num_tx_rings_p_up = min_t(int, mp_ncpus,
85 MLX4_EN_MAX_TX_RING_P_UP);
86 if (params->udp_rss && !(mdev->dev->caps.flags
87 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
88 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
91 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
92 params->prof[i].rx_pause = 1;
93 params->prof[i].rx_ppp = pfcrx;
94 params->prof[i].tx_pause = 1;
95 params->prof[i].tx_ppp = pfctx;
96 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
97 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
98 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
100 params->prof[i].rss_rings = 0;
106 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
108 struct mlx4_en_dev *endev = ctx;
110 return endev->pndev[port];
113 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
114 enum mlx4_dev_event event, unsigned long port)
116 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
117 struct mlx4_en_priv *priv;
120 case MLX4_DEV_EVENT_PORT_UP:
121 case MLX4_DEV_EVENT_PORT_DOWN:
122 if (!mdev->pndev[port])
124 priv = netdev_priv(mdev->pndev[port]);
125 /* To prevent races, we poll the link state in a separate
126 task rather than changing it here */
127 priv->link_state = event;
128 queue_work(mdev->workqueue, &priv->linkstate_task);
131 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
132 mlx4_err(mdev, "Internal error detected, restarting device\n");
135 case MLX4_DEV_EVENT_SLAVE_INIT:
136 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
139 if (port < 1 || port > dev->caps.num_ports ||
142 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
147 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
149 struct mlx4_en_dev *mdev = endev_ptr;
152 mutex_lock(&mdev->state_lock);
153 mdev->device_up = false;
154 mutex_unlock(&mdev->state_lock);
156 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
158 mlx4_en_destroy_netdev(mdev->pndev[i]);
160 flush_workqueue(mdev->workqueue);
161 destroy_workqueue(mdev->workqueue);
162 ret = mlx4_mr_free(dev, &mdev->mr);
164 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
165 iounmap(mdev->uar_map);
166 mlx4_uar_free(dev, &mdev->priv_uar);
167 mlx4_pd_free(dev, mdev->priv_pdn);
171 static void *mlx4_en_add(struct mlx4_dev *dev)
173 struct mlx4_en_dev *mdev;
177 printk_once(KERN_INFO "%s", mlx4_en_version);
179 mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
181 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
187 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
190 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
193 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
197 spin_lock_init(&mdev->uar_lock);
200 mdev->dma_device = &(dev->pdev->dev);
201 mdev->pdev = dev->pdev;
202 mdev->device_up = false;
204 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
205 if (!mdev->LSO_support)
206 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
207 "FW version to enable LSO\n");
209 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
210 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
212 mlx4_err(mdev, "Failed allocating memory region\n");
215 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
216 mlx4_err(mdev, "Failed enabling memory region\n");
220 /* Build device profile according to supplied module parameters */
221 err = mlx4_en_get_profile(mdev);
223 mlx4_err(mdev, "Bad module parameters, aborting.\n");
227 /* Configure which ports to start according to module parameters */
229 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
233 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
234 if (!dev->caps.comp_pool) {
235 mdev->profile.prof[i].rx_ring_num =
236 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
238 dev->caps.num_comp_vectors,
241 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
242 min_t(int, dev->caps.comp_pool /
243 dev->caps.num_ports, MAX_MSIX_P_PORT));
247 /* Create our own workqueue for reset/multicast tasks
248 * Note: we cannot use the shared workqueue because of deadlocks caused
249 * by the rtnl lock */
250 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
251 if (!mdev->workqueue) {
256 /* At this stage all non-port specific tasks are complete:
257 * mark the card state as up */
258 mutex_init(&mdev->state_lock);
259 mdev->device_up = true;
263 /* Create a netdev for each port */
264 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
265 mlx4_info(mdev, "Activating port:%d\n", i);
266 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
267 mdev->pndev[i] = NULL;
273 err = mlx4_mr_free(dev, &mdev->mr);
275 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
278 iounmap(mdev->uar_map);
280 mlx4_uar_free(dev, &mdev->priv_uar);
282 mlx4_pd_free(dev, mdev->priv_pdn);
289 static struct mlx4_interface mlx4_en_interface = {
291 .remove = mlx4_en_remove,
292 .event = mlx4_en_event,
293 .get_dev = mlx4_en_get_netdev,
294 .protocol = MLX4_PROT_ETH,
297 static void mlx4_en_verify_params(void)
299 if (pfctx > MAX_PFC_TX) {
300 pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - "
301 "should be in range 0-0x%x, will be changed to default (0)\n",
306 if (pfcrx > MAX_PFC_RX) {
307 pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - "
308 "should be in range 0-0x%x, will be changed to default (0)\n",
315 static int __init mlx4_en_init(void)
317 mlx4_en_verify_params();
319 #ifdef CONFIG_DEBUG_FS
321 err = mlx4_en_register_debugfs();
323 pr_err(KERN_ERR "Failed to register debugfs\n");
325 return mlx4_register_interface(&mlx4_en_interface);
328 static void __exit mlx4_en_cleanup(void)
330 mlx4_unregister_interface(&mlx4_en_interface);
331 #ifdef CONFIG_DEBUG_FS
332 mlx4_en_unregister_debugfs();
336 module_init(mlx4_en_init);
337 module_exit(mlx4_en_cleanup);
339 #undef MODULE_VERSION
340 #include <sys/module.h>
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);