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 #include <linux/slab.h>
  39
  40 #include <linux/mlx4/driver.h>
  41 #include <linux/mlx4/device.h>
  42 #include <linux/mlx4/cmd.h>
  43
  44 #include "mlx4_en.h"
  45
  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")");
  50
  51 static const char mlx4_en_version[] =
  52         DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
  53         DRV_VERSION " (" DRV_RELDATE ")\n";
  54
  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);
  59
  60
  61 /*
  62  * Device scope module parameters
  63  */
  64
  65
  66 /* Enable RSS TCP traffic */
  67 MLX4_EN_PARM_INT(tcp_rss, 1,
  68                  "Enable RSS for incomming TCP traffic or disabled (0)");
  69 /* Enable RSS UDP traffic */
  70 MLX4_EN_PARM_INT(udp_rss, 1,
  71                  "Enable RSS for incomming UDP traffic or disabled (0)");
  72
  73 /* Priority pausing */
  74 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
  75                            " Per priority bit mask");
  76 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
  77                            " Per priority bit mask");
  78
  79 int en_print(const char *level, const struct mlx4_en_priv *priv,
  80              const char *format, ...)
  81 {
  82         va_list args;
  83         struct va_format vaf;
  84         int i;
  85
  86         va_start(args, format);
  87
  88         vaf.fmt = format;
  89         vaf.va = &args;
  90         if (priv->registered)
  91                 i = printk("%s%s: %s: %pV",
  92                            level, DRV_NAME, priv->dev->name, &vaf);
  93         else
  94                 i = printk("%s%s: %s: Port %d: %pV",
  95                            level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
  96                            priv->port, &vaf);
  97         va_end(args);
  98
  99         return i;
 100 }
 101
 102 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
 103 {
 104         struct mlx4_en_profile *params = &mdev->profile;
 105         int i;
 106
 107         params->tcp_rss = tcp_rss;
 108         params->udp_rss = udp_rss;
 109         if (params->udp_rss && !mdev->dev->caps.udp_rss) {
 110                 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
 111                 params->udp_rss = 0;
 112         }
 113         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
 114                 params->prof[i].rx_pause = 1;
 115                 params->prof[i].rx_ppp = pfcrx;
 116                 params->prof[i].tx_pause = 1;
 117                 params->prof[i].tx_ppp = pfctx;
 118                 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
 119                 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
 120                 params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
 121                         (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
 122         }
 123
 124         return 0;
 125 }
 126
 127 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
 128 {
 129         struct mlx4_en_dev *endev = ctx;
 130
 131         return endev->pndev[port];
 132 }
 133
 134 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 135                           enum mlx4_dev_event event, int port)
 136 {
 137         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 138         struct mlx4_en_priv *priv;
 139
 140         if (!mdev->pndev[port])
 141                 return;
 142
 143         priv = netdev_priv(mdev->pndev[port]);
 144         switch (event) {
 145         case MLX4_DEV_EVENT_PORT_UP:
 146         case MLX4_DEV_EVENT_PORT_DOWN:
 147                 /* To prevent races, we poll the link state in a separate
 148                   task rather than changing it here */
 149                 priv->link_state = event;
 150                 queue_work(mdev->workqueue, &priv->linkstate_task);
 151                 break;
 152
 153         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 154                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 155                 break;
 156
 157         default:
 158                 mlx4_warn(mdev, "Unhandled event: %d\n", event);
 159         }
 160 }
 161
 162 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 163 {
 164         struct mlx4_en_dev *mdev = endev_ptr;
 165         int i;
 166
 167         mutex_lock(&mdev->state_lock);
 168         mdev->device_up = false;
 169         mutex_unlock(&mdev->state_lock);
 170
 171         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 172                 if (mdev->pndev[i])
 173                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 174
 175         flush_workqueue(mdev->workqueue);
 176         destroy_workqueue(mdev->workqueue);
 177         mlx4_mr_free(dev, &mdev->mr);
 178         mlx4_uar_free(dev, &mdev->priv_uar);
 179         mlx4_pd_free(dev, mdev->priv_pdn);
 180         kfree(mdev);
 181 }
 182
 183 static void *mlx4_en_add(struct mlx4_dev *dev)
 184 {
 185         struct mlx4_en_dev *mdev;
 186         int i;
 187         int err;
 188
 189         printk_once(KERN_INFO "%s", mlx4_en_version);
 190
 191         mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
 192         if (!mdev) {
 193                 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
 194                         "aborting.\n");
 195                 err = -ENOMEM;
 196                 goto err_free_res;
 197         }
 198
 199         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 200                 goto err_free_dev;
 201
 202         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 203                 goto err_pd;
 204
 205         mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 206         if (!mdev->uar_map)
 207                 goto err_uar;
 208         spin_lock_init(&mdev->uar_lock);
 209
 210         mdev->dev = dev;
 211         mdev->dma_device = &(dev->pdev->dev);
 212         mdev->pdev = dev->pdev;
 213         mdev->device_up = false;
 214
 215         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 216         if (!mdev->LSO_support)
 217                 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
 218                                 "FW version to enable LSO\n");
 219
 220         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 221                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 222                          0, 0, &mdev->mr)) {
 223                 mlx4_err(mdev, "Failed allocating memory region\n");
 224                 goto err_uar;
 225         }
 226         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 227                 mlx4_err(mdev, "Failed enabling memory region\n");
 228                 goto err_mr;
 229         }
 230
 231         /* Build device profile according to supplied module parameters */
 232         err = mlx4_en_get_profile(mdev);
 233         if (err) {
 234                 mlx4_err(mdev, "Bad module parameters, aborting.\n");
 235                 goto err_mr;
 236         }
 237
 238         /* Configure wich ports to start according to module parameters */
 239         mdev->port_cnt = 0;
 240         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 241                 mdev->port_cnt++;
 242
 243         /* If we did not receive an explicit number of Rx rings, default to
 244          * the number of completion vectors populated by the mlx4_core */
 245         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 246                 mlx4_info(mdev, "Using %d tx rings for port:%d\n",
 247                           mdev->profile.prof[i].tx_ring_num, i);
 248                 mdev->profile.prof[i].rx_ring_num = min_t(int,
 249                         roundup_pow_of_two(dev->caps.num_comp_vectors),
 250                         MAX_RX_RINGS);
 251                 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
 252                           mdev->profile.prof[i].rx_ring_num, i);
 253         }
 254
 255         /* Create our own workqueue for reset/multicast tasks
 256          * Note: we cannot use the shared workqueue because of deadlocks caused
 257          *       by the rtnl lock */
 258         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 259         if (!mdev->workqueue) {
 260                 err = -ENOMEM;
 261                 goto err_mr;
 262         }
 263
 264         /* At this stage all non-port specific tasks are complete:
 265          * mark the card state as up */
 266         mutex_init(&mdev->state_lock);
 267         mdev->device_up = true;
 268
 269         /* Setup ports */
 270
 271         /* Create a netdev for each port */
 272         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 273                 mlx4_info(mdev, "Activating port:%d\n", i);
 274                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
 275                         mdev->pndev[i] = NULL;
 276         }
 277         return mdev;
 278
 279 err_mr:
 280         mlx4_mr_free(dev, &mdev->mr);
 281 err_uar:
 282         mlx4_uar_free(dev, &mdev->priv_uar);
 283 err_pd:
 284         mlx4_pd_free(dev, mdev->priv_pdn);
 285 err_free_dev:
 286         kfree(mdev);
 287 err_free_res:
 288         return NULL;
 289 }
 290
 291 static struct mlx4_interface mlx4_en_interface = {
 292         .add            = mlx4_en_add,
 293         .remove         = mlx4_en_remove,
 294         .event          = mlx4_en_event,
 295         .get_dev        = mlx4_en_get_netdev,
 296         .protocol       = MLX4_PROTOCOL_EN,
 297 };
 298
 299 static int __init mlx4_en_init(void)
 300 {
 301         return mlx4_register_interface(&mlx4_en_interface);
 302 }
 303
 304 static void __exit mlx4_en_cleanup(void)
 305 {
 306         mlx4_unregister_interface(&mlx4_en_interface);
 307 }
 308
 309 module_init(mlx4_en_init);
 310 module_exit(mlx4_en_cleanup);
 311