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 int en_print(const char *level, const struct mlx4_en_priv *priv,
76 const char *format, ...)
82 va_start(args, format);
87 i = printk("%s%s: %s: %pV",
88 level, DRV_NAME, priv->dev->name, &vaf);
90 i = printk("%s%s: %s: Port %d: %pV",
91 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
98 void mlx4_en_update_loopback_state(struct net_device *dev,
99 netdev_features_t features)
101 struct mlx4_en_priv *priv = netdev_priv(dev);
103 priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
104 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
106 /* Drop the packet if SRIOV is not enabled
107 * and not performing the selftest or flb disabled
109 if (mlx4_is_mfunc(priv->mdev->dev) &&
110 !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
111 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
113 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
116 if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
117 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
120 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
122 struct mlx4_en_profile *params = &mdev->profile;
125 params->udp_rss = udp_rss;
126 params->num_tx_rings_p_up = min_t(int, num_online_cpus(),
127 MLX4_EN_MAX_TX_RING_P_UP);
128 if (params->udp_rss && !(mdev->dev->caps.flags
129 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
130 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
133 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
134 params->prof[i].rx_pause = 1;
135 params->prof[i].rx_ppp = pfcrx;
136 params->prof[i].tx_pause = 1;
137 params->prof[i].tx_ppp = pfctx;
138 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
139 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
140 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
142 params->prof[i].rss_rings = 0;
148 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
150 struct mlx4_en_dev *endev = ctx;
152 return endev->pndev[port];
155 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
156 enum mlx4_dev_event event, unsigned long port)
158 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
159 struct mlx4_en_priv *priv;
162 case MLX4_DEV_EVENT_PORT_UP:
163 case MLX4_DEV_EVENT_PORT_DOWN:
164 if (!mdev->pndev[port])
166 priv = netdev_priv(mdev->pndev[port]);
167 /* To prevent races, we poll the link state in a separate
168 task rather than changing it here */
169 priv->link_state = event;
170 queue_work(mdev->workqueue, &priv->linkstate_task);
173 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
174 mlx4_err(mdev, "Internal error detected, restarting device\n");
178 if (port < 1 || port > dev->caps.num_ports ||
181 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
186 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
188 struct mlx4_en_dev *mdev = endev_ptr;
191 mutex_lock(&mdev->state_lock);
192 mdev->device_up = false;
193 mutex_unlock(&mdev->state_lock);
195 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
197 mlx4_en_destroy_netdev(mdev->pndev[i]);
199 flush_workqueue(mdev->workqueue);
200 destroy_workqueue(mdev->workqueue);
201 (void) mlx4_mr_free(dev, &mdev->mr);
202 iounmap(mdev->uar_map);
203 mlx4_uar_free(dev, &mdev->priv_uar);
204 mlx4_pd_free(dev, mdev->priv_pdn);
208 static void *mlx4_en_add(struct mlx4_dev *dev)
210 struct mlx4_en_dev *mdev;
214 printk_once(KERN_INFO "%s", mlx4_en_version);
216 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
222 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
225 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
228 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
232 spin_lock_init(&mdev->uar_lock);
235 mdev->dma_device = &(dev->pdev->dev);
236 mdev->pdev = dev->pdev;
237 mdev->device_up = false;
239 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
240 if (!mdev->LSO_support)
241 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
242 "FW version to enable LSO\n");
244 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
245 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
247 mlx4_err(mdev, "Failed allocating memory region\n");
250 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
251 mlx4_err(mdev, "Failed enabling memory region\n");
255 /* Build device profile according to supplied module parameters */
256 err = mlx4_en_get_profile(mdev);
258 mlx4_err(mdev, "Bad module parameters, aborting.\n");
262 /* Configure which ports to start according to module parameters */
264 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
267 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
268 if (!dev->caps.comp_pool) {
269 mdev->profile.prof[i].rx_ring_num =
270 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
272 dev->caps.num_comp_vectors,
275 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
276 min_t(int, dev->caps.comp_pool/
277 dev->caps.num_ports - 1 , MAX_MSIX_P_PORT - 1));
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) {
290 /* At this stage all non-port specific tasks are complete:
291 * mark the card state as up */
292 mutex_init(&mdev->state_lock);
293 mdev->device_up = true;
297 /* Create a netdev for each port */
298 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
299 mlx4_info(mdev, "Activating port:%d\n", i);
300 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
301 mdev->pndev[i] = NULL;
304 /* Initialize time stamp mechanism */
305 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
306 mlx4_en_init_timestamp(mdev);
311 (void) mlx4_mr_free(dev, &mdev->mr);
314 iounmap(mdev->uar_map);
316 mlx4_uar_free(dev, &mdev->priv_uar);
318 mlx4_pd_free(dev, mdev->priv_pdn);
325 static struct mlx4_interface mlx4_en_interface = {
327 .remove = mlx4_en_remove,
328 .event = mlx4_en_event,
329 .get_dev = mlx4_en_get_netdev,
330 .protocol = MLX4_PROT_ETH,
333 static int __init mlx4_en_init(void)
335 return mlx4_register_interface(&mlx4_en_interface);
338 static void __exit mlx4_en_cleanup(void)
340 mlx4_unregister_interface(&mlx4_en_interface);
343 module_init(mlx4_en_init);
344 module_exit(mlx4_en_cleanup);