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
65 /* Enable RSS UDP traffic */
66 MLX4_EN_PARM_INT(udp_rss, 1,
67 "Enable RSS for incoming UDP traffic or disabled (0)");
69 /* Priority pausing */
70 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
71 " Per priority bit mask");
72 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
73 " Per priority bit mask");
75 MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
76 "Threshold for using inline data (range: 17-104, default: 104)");
78 #define MAX_PFC_TX 0xff
79 #define MAX_PFC_RX 0xff
81 void en_print(const char *level, const struct mlx4_en_priv *priv,
82 const char *format, ...)
87 va_start(args, format);
92 printk("%s%s: %s: %pV",
93 level, DRV_NAME, priv->dev->name, &vaf);
95 printk("%s%s: %s: Port %d: %pV",
96 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
101 void mlx4_en_update_loopback_state(struct net_device *dev,
102 netdev_features_t features)
104 struct mlx4_en_priv *priv = netdev_priv(dev);
106 priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
107 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
109 /* Drop the packet if SRIOV is not enabled
110 * and not performing the selftest or flb disabled
112 if (mlx4_is_mfunc(priv->mdev->dev) &&
113 !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
114 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
116 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
119 if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
120 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
123 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
125 struct mlx4_en_profile *params = &mdev->profile;
128 params->udp_rss = udp_rss;
129 params->num_tx_rings_p_up = mlx4_low_memory_profile() ?
130 MLX4_EN_MIN_TX_RING_P_UP :
131 min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);
133 if (params->udp_rss && !(mdev->dev->caps.flags
134 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
135 mlx4_warn(mdev, "UDP RSS is not supported on this device\n");
138 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
139 params->prof[i].rx_pause = 1;
140 params->prof[i].rx_ppp = pfcrx;
141 params->prof[i].tx_pause = 1;
142 params->prof[i].tx_ppp = pfctx;
143 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
144 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
145 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
147 params->prof[i].rss_rings = 0;
148 params->prof[i].inline_thold = inline_thold;
154 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
156 struct mlx4_en_dev *endev = ctx;
158 return endev->pndev[port];
161 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
162 enum mlx4_dev_event event, unsigned long port)
164 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
165 struct mlx4_en_priv *priv;
168 case MLX4_DEV_EVENT_PORT_UP:
169 case MLX4_DEV_EVENT_PORT_DOWN:
170 if (!mdev->pndev[port])
172 priv = netdev_priv(mdev->pndev[port]);
173 /* To prevent races, we poll the link state in a separate
174 task rather than changing it here */
175 priv->link_state = event;
176 queue_work(mdev->workqueue, &priv->linkstate_task);
179 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
180 mlx4_err(mdev, "Internal error detected, restarting device\n");
183 case MLX4_DEV_EVENT_SLAVE_INIT:
184 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
187 if (port < 1 || port > dev->caps.num_ports ||
190 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
195 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
197 struct mlx4_en_dev *mdev = endev_ptr;
200 mutex_lock(&mdev->state_lock);
201 mdev->device_up = false;
202 mutex_unlock(&mdev->state_lock);
204 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
206 mlx4_en_destroy_netdev(mdev->pndev[i]);
208 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
209 mlx4_en_remove_timestamp(mdev);
211 flush_workqueue(mdev->workqueue);
212 destroy_workqueue(mdev->workqueue);
213 (void) mlx4_mr_free(dev, &mdev->mr);
214 iounmap(mdev->uar_map);
215 mlx4_uar_free(dev, &mdev->priv_uar);
216 mlx4_pd_free(dev, mdev->priv_pdn);
220 static void *mlx4_en_add(struct mlx4_dev *dev)
222 struct mlx4_en_dev *mdev;
225 printk_once(KERN_INFO "%s", mlx4_en_version);
227 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
231 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
234 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
237 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
241 spin_lock_init(&mdev->uar_lock);
244 mdev->dma_device = &(dev->pdev->dev);
245 mdev->pdev = dev->pdev;
246 mdev->device_up = false;
248 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
249 if (!mdev->LSO_support)
250 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
252 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
253 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
255 mlx4_err(mdev, "Failed allocating memory region\n");
258 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
259 mlx4_err(mdev, "Failed enabling memory region\n");
263 /* Build device profile according to supplied module parameters */
264 if (mlx4_en_get_profile(mdev)) {
265 mlx4_err(mdev, "Bad module parameters, aborting\n");
269 /* Configure which ports to start according to module parameters */
271 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
274 /* Initialize time stamp mechanism */
275 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
276 mlx4_en_init_timestamp(mdev);
278 /* Set default number of RX rings*/
279 mlx4_en_set_num_rx_rings(mdev);
281 /* Create our own workqueue for reset/multicast tasks
282 * Note: we cannot use the shared workqueue because of deadlocks caused
283 * by the rtnl lock */
284 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
285 if (!mdev->workqueue)
288 /* At this stage all non-port specific tasks are complete:
289 * mark the card state as up */
290 mutex_init(&mdev->state_lock);
291 mdev->device_up = true;
295 /* Create a netdev for each port */
296 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
297 mlx4_info(mdev, "Activating port:%d\n", i);
298 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
299 mdev->pndev[i] = NULL;
305 (void) mlx4_mr_free(dev, &mdev->mr);
308 iounmap(mdev->uar_map);
310 mlx4_uar_free(dev, &mdev->priv_uar);
312 mlx4_pd_free(dev, mdev->priv_pdn);
319 static struct mlx4_interface mlx4_en_interface = {
321 .remove = mlx4_en_remove,
322 .event = mlx4_en_event,
323 .get_dev = mlx4_en_get_netdev,
324 .protocol = MLX4_PROT_ETH,
327 static void mlx4_en_verify_params(void)
329 if (pfctx > MAX_PFC_TX) {
330 pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
335 if (pfcrx > MAX_PFC_RX) {
336 pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - should be in range 0-0x%x, will be changed to default (0)\n",
341 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
342 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
343 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
344 inline_thold = MAX_INLINE;
348 static int __init mlx4_en_init(void)
350 mlx4_en_verify_params();
352 return mlx4_register_interface(&mlx4_en_interface);
355 static void __exit mlx4_en_cleanup(void)
357 mlx4_unregister_interface(&mlx4_en_interface);
360 module_init(mlx4_en_init);
361 module_exit(mlx4_en_cleanup);