drivers/net/mlx4/en_main.c

   1 /*
   2  * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
   3  *
   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:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  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.
  22  *
  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
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/cpumask.h>
  35 #include <linux/module.h>
  36 #include <linux/delay.h>
  37 #include <linux/netdevice.h>
  38
  39 #include <linux/mlx4/driver.h>
  40 #include <linux/mlx4/device.h>
  41 #include <linux/mlx4/cmd.h>
  42
  43 #include "mlx4_en.h"
  44
  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")");
  49
  50 static const char mlx4_en_version[] =
  51         DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
  52         DRV_VERSION " (" DRV_RELDATE ")\n";
  53
  54 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
  55                           enum mlx4_dev_event event, int port)
  56 {
  57         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
  58         struct mlx4_en_priv *priv;
  59
  60         if (!mdev->pndev[port])
  61                 return;
  62
  63         priv = netdev_priv(mdev->pndev[port]);
  64         switch (event) {
  65         case MLX4_DEV_EVENT_PORT_UP:
  66         case MLX4_DEV_EVENT_PORT_DOWN:
  67                 /* To prevent races, we poll the link state in a separate
  68                   task rather than changing it here */
  69                 priv->link_state = event;
  70                 queue_work(mdev->workqueue, &priv->linkstate_task);
  71                 break;
  72
  73         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
  74                 mlx4_err(mdev, "Internal error detected, restarting device\n");
  75                 break;
  76
  77         default:
  78                 mlx4_warn(mdev, "Unhandled event: %d\n", event);
  79         }
  80 }
  81
  82 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
  83 {
  84         struct mlx4_en_dev *mdev = endev_ptr;
  85         int i;
  86
  87         mutex_lock(&mdev->state_lock);
  88         mdev->device_up = false;
  89         mutex_unlock(&mdev->state_lock);
  90
  91         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
  92                 if (mdev->pndev[i])
  93                         mlx4_en_destroy_netdev(mdev->pndev[i]);
  94
  95         flush_workqueue(mdev->workqueue);
  96         destroy_workqueue(mdev->workqueue);
  97         mlx4_mr_free(dev, &mdev->mr);
  98         mlx4_uar_free(dev, &mdev->priv_uar);
  99         mlx4_pd_free(dev, mdev->priv_pdn);
 100         kfree(mdev);
 101 }
 102
 103 static void *mlx4_en_add(struct mlx4_dev *dev)
 104 {
 105         static int mlx4_en_version_printed;
 106         struct mlx4_en_dev *mdev;
 107         int i;
 108         int err;
 109
 110         if (!mlx4_en_version_printed) {
 111                 printk(KERN_INFO "%s", mlx4_en_version);
 112                 mlx4_en_version_printed++;
 113         }
 114
 115         mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
 116         if (!mdev) {
 117                 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
 118                         "aborting.\n");
 119                 err = -ENOMEM;
 120                 goto err_free_res;
 121         }
 122
 123         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 124                 goto err_free_dev;
 125
 126         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 127                 goto err_pd;
 128
 129         mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 130         if (!mdev->uar_map)
 131                 goto err_uar;
 132         spin_lock_init(&mdev->uar_lock);
 133
 134         mdev->dev = dev;
 135         mdev->dma_device = &(dev->pdev->dev);
 136         mdev->pdev = dev->pdev;
 137         mdev->device_up = false;
 138
 139         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 140         if (!mdev->LSO_support)
 141                 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
 142                                 "FW version to enable LSO\n");
 143
 144         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 145                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 146                          0, 0, &mdev->mr)) {
 147                 mlx4_err(mdev, "Failed allocating memory region\n");
 148                 goto err_uar;
 149         }
 150         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 151                 mlx4_err(mdev, "Failed enabling memory region\n");
 152                 goto err_mr;
 153         }
 154
 155         /* Build device profile according to supplied module parameters */
 156         err = mlx4_en_get_profile(mdev);
 157         if (err) {
 158                 mlx4_err(mdev, "Bad module parameters, aborting.\n");
 159                 goto err_mr;
 160         }
 161
 162         /* Configure wich ports to start according to module parameters */
 163         mdev->port_cnt = 0;
 164         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 165                 mdev->port_cnt++;
 166
 167         /* If we did not receive an explicit number of Rx rings, default to
 168          * the number of completion vectors populated by the mlx4_core */
 169         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 170                 mlx4_info(mdev, "Using %d tx rings for port:%d\n",
 171                           mdev->profile.prof[i].tx_ring_num, i);
 172                 mdev->profile.prof[i].rx_ring_num =
 173                         min_t(int, dev->caps.num_comp_vectors, MAX_RX_RINGS);
 174                 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
 175                           mdev->profile.prof[i].rx_ring_num, i);
 176         }
 177
 178         /* Create our own workqueue for reset/multicast tasks
 179          * Note: we cannot use the shared workqueue because of deadlocks caused
 180          *       by the rtnl lock */
 181         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 182         if (!mdev->workqueue) {
 183                 err = -ENOMEM;
 184                 goto err_mr;
 185         }
 186
 187         /* At this stage all non-port specific tasks are complete:
 188          * mark the card state as up */
 189         mutex_init(&mdev->state_lock);
 190         mdev->device_up = true;
 191
 192         /* Setup ports */
 193
 194         /* Create a netdev for each port */
 195         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 196                 mlx4_info(mdev, "Activating port:%d\n", i);
 197                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) {
 198                         mdev->pndev[i] = NULL;
 199                         goto err_free_netdev;
 200                 }
 201         }
 202         return mdev;
 203
 204
 205 err_free_netdev:
 206         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 207                 if (mdev->pndev[i])
 208                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 209         }
 210
 211         mutex_lock(&mdev->state_lock);
 212         mdev->device_up = false;
 213         mutex_unlock(&mdev->state_lock);
 214         flush_workqueue(mdev->workqueue);
 215
 216         /* Stop event queue before we drop down to release shared SW state */
 217         destroy_workqueue(mdev->workqueue);
 218
 219 err_mr:
 220         mlx4_mr_free(dev, &mdev->mr);
 221 err_uar:
 222         mlx4_uar_free(dev, &mdev->priv_uar);
 223 err_pd:
 224         mlx4_pd_free(dev, mdev->priv_pdn);
 225 err_free_dev:
 226         kfree(mdev);
 227 err_free_res:
 228         return NULL;
 229 }
 230
 231 static struct mlx4_interface mlx4_en_interface = {
 232         .add    = mlx4_en_add,
 233         .remove = mlx4_en_remove,
 234         .event  = mlx4_en_event,
 235 };
 236
 237 static int __init mlx4_en_init(void)
 238 {
 239         return mlx4_register_interface(&mlx4_en_interface);
 240 }
 241
 242 static void __exit mlx4_en_cleanup(void)
 243 {
 244         mlx4_unregister_interface(&mlx4_en_interface);
 245 }
 246
 247 module_init(mlx4_en_init);
 248 module_exit(mlx4_en_cleanup);
 249