drivers/net/ethernet/mellanox/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 /* Enable RSS UDP traffic */
  66 MLX4_EN_PARM_INT(udp_rss, 1,
  67                  "Enable RSS for incoming UDP traffic or disabled (0)");
  68
  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");
  74
  75 int en_print(const char *level, const struct mlx4_en_priv *priv,
  76              const char *format, ...)
  77 {
  78         va_list args;
  79         struct va_format vaf;
  80         int i;
  81
  82         va_start(args, format);
  83
  84         vaf.fmt = format;
  85         vaf.va = &args;
  86         if (priv->registered)
  87                 i = printk("%s%s: %s: %pV",
  88                            level, DRV_NAME, priv->dev->name, &vaf);
  89         else
  90                 i = printk("%s%s: %s: Port %d: %pV",
  91                            level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
  92                            priv->port, &vaf);
  93         va_end(args);
  94
  95         return i;
  96 }
  97
  98 void mlx4_en_update_loopback_state(struct net_device *dev,
  99                                    netdev_features_t features)
 100 {
 101         struct mlx4_en_priv *priv = netdev_priv(dev);
 102
 103         priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
 104                         MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
 105
 106         /* Drop the packet if SRIOV is not enabled
 107          * and not performing the selftest or flb disabled
 108          */
 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;
 112
 113         /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
 114          * is requested
 115          */
 116         if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
 117                 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
 118 }
 119
 120 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
 121 {
 122         struct mlx4_en_profile *params = &mdev->profile;
 123         int i;
 124
 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");
 131                 params->udp_rss = 0;
 132         }
 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 *
 141                         MLX4_EN_NUM_UP;
 142                 params->prof[i].rss_rings = 0;
 143         }
 144
 145         return 0;
 146 }
 147
 148 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
 149 {
 150         struct mlx4_en_dev *endev = ctx;
 151
 152         return endev->pndev[port];
 153 }
 154
 155 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 156                           enum mlx4_dev_event event, unsigned long port)
 157 {
 158         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 159         struct mlx4_en_priv *priv;
 160
 161         switch (event) {
 162         case MLX4_DEV_EVENT_PORT_UP:
 163         case MLX4_DEV_EVENT_PORT_DOWN:
 164                 if (!mdev->pndev[port])
 165                         return;
 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);
 171                 break;
 172
 173         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 174                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 175                 break;
 176
 177         default:
 178                 if (port < 1 || port > dev->caps.num_ports ||
 179                     !mdev->pndev[port])
 180                         return;
 181                 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
 182                           (int) port);
 183         }
 184 }
 185
 186 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 187 {
 188         struct mlx4_en_dev *mdev = endev_ptr;
 189         int i;
 190
 191         mutex_lock(&mdev->state_lock);
 192         mdev->device_up = false;
 193         mutex_unlock(&mdev->state_lock);
 194
 195         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 196                 if (mdev->pndev[i])
 197                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 198
 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);
 205         kfree(mdev);
 206 }
 207
 208 static void *mlx4_en_add(struct mlx4_dev *dev)
 209 {
 210         struct mlx4_en_dev *mdev;
 211         int i;
 212         int err;
 213
 214         printk_once(KERN_INFO "%s", mlx4_en_version);
 215
 216         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 217         if (!mdev) {
 218                 err = -ENOMEM;
 219                 goto err_free_res;
 220         }
 221
 222         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 223                 goto err_free_dev;
 224
 225         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 226                 goto err_pd;
 227
 228         mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
 229                                 PAGE_SIZE);
 230         if (!mdev->uar_map)
 231                 goto err_uar;
 232         spin_lock_init(&mdev->uar_lock);
 233
 234         mdev->dev = dev;
 235         mdev->dma_device = &(dev->pdev->dev);
 236         mdev->pdev = dev->pdev;
 237         mdev->device_up = false;
 238
 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");
 243
 244         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 245                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 246                          0, 0, &mdev->mr)) {
 247                 mlx4_err(mdev, "Failed allocating memory region\n");
 248                 goto err_map;
 249         }
 250         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 251                 mlx4_err(mdev, "Failed enabling memory region\n");
 252                 goto err_mr;
 253         }
 254
 255         /* Build device profile according to supplied module parameters */
 256         err = mlx4_en_get_profile(mdev);
 257         if (err) {
 258                 mlx4_err(mdev, "Bad module parameters, aborting.\n");
 259                 goto err_mr;
 260         }
 261
 262         /* Configure which ports to start according to module parameters */
 263         mdev->port_cnt = 0;
 264         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 265                 mdev->port_cnt++;
 266
 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,
 271                                                            min_t(int,
 272                                                                  dev->caps.num_comp_vectors,
 273                                                                  DEF_RX_RINGS)));
 274                 } else {
 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));
 278                 }
 279         }
 280
 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) {
 286                 err = -ENOMEM;
 287                 goto err_mr;
 288         }
 289
 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;
 294
 295         /* Setup ports */
 296
 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;
 302         }
 303
 304         /* Initialize time stamp mechanism */
 305         if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
 306                 mlx4_en_init_timestamp(mdev);
 307
 308         return mdev;
 309
 310 err_mr:
 311         (void) mlx4_mr_free(dev, &mdev->mr);
 312 err_map:
 313         if (mdev->uar_map)
 314                 iounmap(mdev->uar_map);
 315 err_uar:
 316         mlx4_uar_free(dev, &mdev->priv_uar);
 317 err_pd:
 318         mlx4_pd_free(dev, mdev->priv_pdn);
 319 err_free_dev:
 320         kfree(mdev);
 321 err_free_res:
 322         return NULL;
 323 }
 324
 325 static struct mlx4_interface mlx4_en_interface = {
 326         .add            = mlx4_en_add,
 327         .remove         = mlx4_en_remove,
 328         .event          = mlx4_en_event,
 329         .get_dev        = mlx4_en_get_netdev,
 330         .protocol       = MLX4_PROT_ETH,
 331 };
 332
 333 static int __init mlx4_en_init(void)
 334 {
 335         return mlx4_register_interface(&mlx4_en_interface);
 336 }
 337
 338 static void __exit mlx4_en_cleanup(void)
 339 {
 340         mlx4_unregister_interface(&mlx4_en_interface);
 341 }
 342
 343 module_init(mlx4_en_init);
 344 module_exit(mlx4_en_cleanup);
 345