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
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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
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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 /* Mellanox ConnectX HCA Ethernet driver */
47 #define MLX4_EN_PARM_INT(X, def_val, desc) \
48 static unsigned int X = def_val;\
49 module_param(X , uint, 0444); \
50 MODULE_PARM_DESC(X, desc);
54 * Device scope module parameters
57 /* Enable RSS UDP traffic */
58 MLX4_EN_PARM_INT(udp_rss, 1,
59 "Enable RSS for incoming UDP traffic");
61 /* Priority pausing */
62 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
63 " Per priority bit mask");
64 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
65 " Per priority bit mask");
67 #define MAX_PFC_TX 0xff
68 #define MAX_PFC_RX 0xff
71 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
73 struct mlx4_en_profile *params = &mdev->profile;
76 params->udp_rss = udp_rss;
77 params->num_tx_rings_p_up = min_t(int, mp_ncpus,
78 MLX4_EN_MAX_TX_RING_P_UP);
79 if (params->udp_rss && !(mdev->dev->caps.flags
80 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
81 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
84 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
85 params->prof[i].rx_pause = 1;
86 params->prof[i].rx_ppp = pfcrx;
87 params->prof[i].tx_pause = 1;
88 params->prof[i].tx_ppp = pfctx;
89 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
90 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
91 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
93 params->prof[i].rss_rings = 0;
99 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
101 struct mlx4_en_dev *endev = ctx;
103 return endev->pndev[port];
106 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
107 enum mlx4_dev_event event, unsigned long port)
109 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
110 struct mlx4_en_priv *priv;
113 case MLX4_DEV_EVENT_PORT_UP:
114 case MLX4_DEV_EVENT_PORT_DOWN:
115 if (!mdev->pndev[port])
117 priv = netdev_priv(mdev->pndev[port]);
118 /* To prevent races, we poll the link state in a separate
119 task rather than changing it here */
120 priv->link_state = event;
121 queue_work(mdev->workqueue, &priv->linkstate_task);
124 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
125 mlx4_err(mdev, "Internal error detected, restarting device\n");
128 case MLX4_DEV_EVENT_SLAVE_INIT:
129 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
132 if (port < 1 || port > dev->caps.num_ports ||
135 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
140 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
142 struct mlx4_en_dev *mdev = endev_ptr;
145 mutex_lock(&mdev->state_lock);
146 mdev->device_up = false;
147 mutex_unlock(&mdev->state_lock);
149 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
151 mlx4_en_destroy_netdev(mdev->pndev[i]);
153 flush_workqueue(mdev->workqueue);
154 destroy_workqueue(mdev->workqueue);
155 ret = mlx4_mr_free(dev, &mdev->mr);
157 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
158 iounmap(mdev->uar_map);
159 mlx4_uar_free(dev, &mdev->priv_uar);
160 mlx4_pd_free(dev, mdev->priv_pdn);
164 static void *mlx4_en_add(struct mlx4_dev *dev)
166 struct mlx4_en_dev *mdev;
170 mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
172 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
178 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
181 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
184 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
188 spin_lock_init(&mdev->uar_lock);
191 mdev->dma_device = &(dev->pdev->dev);
192 mdev->pdev = dev->pdev;
193 mdev->device_up = false;
195 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
196 if (!mdev->LSO_support)
197 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
198 "FW version to enable LSO\n");
200 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
201 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
203 mlx4_err(mdev, "Failed allocating memory region\n");
206 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
207 mlx4_err(mdev, "Failed enabling memory region\n");
211 /* Build device profile according to supplied module parameters */
212 err = mlx4_en_get_profile(mdev);
214 mlx4_err(mdev, "Bad module parameters, aborting.\n");
218 /* Configure which ports to start according to module parameters */
220 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
224 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
225 if (!dev->caps.comp_pool) {
226 mdev->profile.prof[i].rx_ring_num =
227 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
229 dev->caps.num_comp_vectors,
232 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
233 min_t(int, dev->caps.comp_pool /
234 dev->caps.num_ports, MAX_MSIX_P_PORT));
238 /* Create our own workqueue for reset/multicast tasks
239 * Note: we cannot use the shared workqueue because of deadlocks caused
240 * by the rtnl lock */
241 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
242 if (!mdev->workqueue) {
247 /* At this stage all non-port specific tasks are complete:
248 * mark the card state as up */
249 mutex_init(&mdev->state_lock);
250 mdev->device_up = true;
254 /* Create a netdev for each port */
255 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
256 mlx4_info(mdev, "Activating port:%d\n", i);
257 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
258 mdev->pndev[i] = NULL;
264 err = mlx4_mr_free(dev, &mdev->mr);
266 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
269 iounmap(mdev->uar_map);
271 mlx4_uar_free(dev, &mdev->priv_uar);
273 mlx4_pd_free(dev, mdev->priv_pdn);
280 static struct mlx4_interface mlx4_en_interface = {
282 .remove = mlx4_en_remove,
283 .event = mlx4_en_event,
284 .get_dev = mlx4_en_get_netdev,
285 .protocol = MLX4_PROT_ETH,
288 static void mlx4_en_verify_params(void)
290 if (pfctx > MAX_PFC_TX) {
291 pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - "
292 "should be in range 0-0x%x, will be changed to default (0)\n",
297 if (pfcrx > MAX_PFC_RX) {
298 pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - "
299 "should be in range 0-0x%x, will be changed to default (0)\n",
306 static int __init mlx4_en_init(void)
308 mlx4_en_verify_params();
310 #ifdef CONFIG_DEBUG_FS
312 err = mlx4_en_register_debugfs();
314 pr_err(KERN_ERR "Failed to register debugfs\n");
316 return mlx4_register_interface(&mlx4_en_interface);
319 static void __exit mlx4_en_cleanup(void)
321 mlx4_unregister_interface(&mlx4_en_interface);
322 #ifdef CONFIG_DEBUG_FS
323 mlx4_en_unregister_debugfs();
327 module_init(mlx4_en_init);
328 module_exit(mlx4_en_cleanup);
330 #undef MODULE_VERSION
331 #include <sys/module.h>
333 mlxen_evhand(module_t mod, int event, void *arg)
337 static moduledata_t mlxen_mod = {
339 .evhand = mlxen_evhand,
341 DECLARE_MODULE(mlxen, mlxen_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY);
342 MODULE_DEPEND(mlxen, mlx4, 1, 1, 1);