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);
  50
  51 static const char mlx4_en_version[] =
  52         DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"
  53         DRV_VERSION "\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 MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
  76                  "Threshold for using inline data (range: 17-104, default: 104)");
  77
  78 #define MAX_PFC_TX     0xff
  79 #define MAX_PFC_RX     0xff
  80
  81 void en_print(const char *level, const struct mlx4_en_priv *priv,
  82               const char *format, ...)
  83 {
  84         va_list args;
  85         struct va_format vaf;
  86
  87         va_start(args, format);
  88
  89         vaf.fmt = format;
  90         vaf.va = &args;
  91         if (priv->registered)
  92                 printk("%s%s: %s: %pV",
  93                        level, DRV_NAME, priv->dev->name, &vaf);
  94         else
  95                 printk("%s%s: %s: Port %d: %pV",
  96                        level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
  97                        priv->port, &vaf);
  98         va_end(args);
  99 }
 100
 101 void mlx4_en_update_loopback_state(struct net_device *dev,
 102                                    netdev_features_t features)
 103 {
 104         struct mlx4_en_priv *priv = netdev_priv(dev);
 105
 106         if (features & NETIF_F_LOOPBACK)
 107                 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
 108         else
 109                 priv->ctrl_flags &= cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
 110
 111         priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
 112                         MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
 113
 114         /* Drop the packet if SRIOV is not enabled
 115          * and not performing the selftest or flb disabled
 116          */
 117         if (mlx4_is_mfunc(priv->mdev->dev) &&
 118             !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
 119                 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
 120
 121         /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
 122          * is requested
 123          */
 124         if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
 125                 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
 126
 127         mutex_lock(&priv->mdev->state_lock);
 128         if ((priv->mdev->dev->caps.flags2 &
 129              MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB) &&
 130             priv->rss_map.indir_qp && priv->rss_map.indir_qp->qpn) {
 131                 int i;
 132                 int err = 0;
 133                 int loopback = !!(features & NETIF_F_LOOPBACK);
 134
 135                 for (i = 0; i < priv->rx_ring_num; i++) {
 136                         int ret;
 137
 138                         ret = mlx4_en_change_mcast_lb(priv,
 139                                                       &priv->rss_map.qps[i],
 140                                                       loopback);
 141                         if (!err)
 142                                 err = ret;
 143                 }
 144                 if (err)
 145                         mlx4_warn(priv->mdev, "failed to change mcast loopback\n");
 146         }
 147         mutex_unlock(&priv->mdev->state_lock);
 148 }
 149
 150 static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)
 151 {
 152         struct mlx4_en_profile *params = &mdev->profile;
 153         int i;
 154
 155         params->udp_rss = udp_rss;
 156         params->max_num_tx_rings_p_up = mlx4_low_memory_profile() ?
 157                 MLX4_EN_MIN_TX_RING_P_UP :
 158                 min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);
 159
 160         if (params->udp_rss && !(mdev->dev->caps.flags
 161                                         & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
 162                 mlx4_warn(mdev, "UDP RSS is not supported on this device\n");
 163                 params->udp_rss = 0;
 164         }
 165         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
 166                 params->prof[i].rx_pause = !(pfcrx || pfctx);
 167                 params->prof[i].rx_ppp = pfcrx;
 168                 params->prof[i].tx_pause = !(pfcrx || pfctx);
 169                 params->prof[i].tx_ppp = pfctx;
 170                 if (mlx4_low_memory_profile()) {
 171                         params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE;
 172                         params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE;
 173                 } else {
 174                         params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
 175                         params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
 176                 }
 177                 params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;
 178                 params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;
 179                 params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *
 180                         params->prof[i].num_up;
 181                 params->prof[i].rss_rings = 0;
 182                 params->prof[i].inline_thold = inline_thold;
 183         }
 184 }
 185
 186 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
 187 {
 188         struct mlx4_en_dev *endev = ctx;
 189
 190         return endev->pndev[port];
 191 }
 192
 193 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 194                           enum mlx4_dev_event event, unsigned long port)
 195 {
 196         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 197         struct mlx4_en_priv *priv;
 198
 199         switch (event) {
 200         case MLX4_DEV_EVENT_PORT_UP:
 201         case MLX4_DEV_EVENT_PORT_DOWN:
 202                 if (!mdev->pndev[port])
 203                         return;
 204                 priv = netdev_priv(mdev->pndev[port]);
 205                 /* To prevent races, we poll the link state in a separate
 206                   task rather than changing it here */
 207                 priv->link_state = event;
 208                 queue_work(mdev->workqueue, &priv->linkstate_task);
 209                 break;
 210
 211         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 212                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 213                 break;
 214
 215         case MLX4_DEV_EVENT_SLAVE_INIT:
 216         case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
 217                 break;
 218         default:
 219                 if (port < 1 || port > dev->caps.num_ports ||
 220                     !mdev->pndev[port])
 221                         return;
 222                 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
 223                           (int) port);
 224         }
 225 }
 226
 227 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 228 {
 229         struct mlx4_en_dev *mdev = endev_ptr;
 230         int i;
 231
 232         mutex_lock(&mdev->state_lock);
 233         mdev->device_up = false;
 234         mutex_unlock(&mdev->state_lock);
 235
 236         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 237                 if (mdev->pndev[i])
 238                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 239
 240         flush_workqueue(mdev->workqueue);
 241         destroy_workqueue(mdev->workqueue);
 242         (void) mlx4_mr_free(dev, &mdev->mr);
 243         iounmap(mdev->uar_map);
 244         mlx4_uar_free(dev, &mdev->priv_uar);
 245         mlx4_pd_free(dev, mdev->priv_pdn);
 246         if (mdev->nb.notifier_call)
 247                 unregister_netdevice_notifier(&mdev->nb);
 248         kfree(mdev);
 249 }
 250
 251 static void mlx4_en_activate(struct mlx4_dev *dev, void *ctx)
 252 {
 253         int i;
 254         struct mlx4_en_dev *mdev = ctx;
 255
 256         /* Create a netdev for each port */
 257         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 258                 mlx4_info(mdev, "Activating port:%d\n", i);
 259                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
 260                         mdev->pndev[i] = NULL;
 261         }
 262
 263         /* register notifier */
 264         mdev->nb.notifier_call = mlx4_en_netdev_event;
 265         if (register_netdevice_notifier(&mdev->nb)) {
 266                 mdev->nb.notifier_call = NULL;
 267                 mlx4_err(mdev, "Failed to create notifier\n");
 268         }
 269 }
 270
 271 static void *mlx4_en_add(struct mlx4_dev *dev)
 272 {
 273         struct mlx4_en_dev *mdev;
 274         int i;
 275
 276         printk_once(KERN_INFO "%s", mlx4_en_version);
 277
 278         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 279         if (!mdev)
 280                 goto err_free_res;
 281
 282         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 283                 goto err_free_dev;
 284
 285         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 286                 goto err_pd;
 287
 288         mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
 289                                 PAGE_SIZE);
 290         if (!mdev->uar_map)
 291                 goto err_uar;
 292         spin_lock_init(&mdev->uar_lock);
 293
 294         mdev->dev = dev;
 295         mdev->dma_device = &dev->persist->pdev->dev;
 296         mdev->pdev = dev->persist->pdev;
 297         mdev->device_up = false;
 298
 299         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 300         if (!mdev->LSO_support)
 301                 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
 302
 303         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 304                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 305                          0, 0, &mdev->mr)) {
 306                 mlx4_err(mdev, "Failed allocating memory region\n");
 307                 goto err_map;
 308         }
 309         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 310                 mlx4_err(mdev, "Failed enabling memory region\n");
 311                 goto err_mr;
 312         }
 313
 314         /* Build device profile according to supplied module parameters */
 315         mlx4_en_get_profile(mdev);
 316
 317         /* Configure which ports to start according to module parameters */
 318         mdev->port_cnt = 0;
 319         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 320                 mdev->port_cnt++;
 321
 322         /* Set default number of RX rings*/
 323         mlx4_en_set_num_rx_rings(mdev);
 324
 325         /* Create our own workqueue for reset/multicast tasks
 326          * Note: we cannot use the shared workqueue because of deadlocks caused
 327          *       by the rtnl lock */
 328         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 329         if (!mdev->workqueue)
 330                 goto err_mr;
 331
 332         /* At this stage all non-port specific tasks are complete:
 333          * mark the card state as up */
 334         mutex_init(&mdev->state_lock);
 335         mdev->device_up = true;
 336
 337         return mdev;
 338
 339 err_mr:
 340         (void) mlx4_mr_free(dev, &mdev->mr);
 341 err_map:
 342         if (mdev->uar_map)
 343                 iounmap(mdev->uar_map);
 344 err_uar:
 345         mlx4_uar_free(dev, &mdev->priv_uar);
 346 err_pd:
 347         mlx4_pd_free(dev, mdev->priv_pdn);
 348 err_free_dev:
 349         kfree(mdev);
 350 err_free_res:
 351         return NULL;
 352 }
 353
 354 static struct mlx4_interface mlx4_en_interface = {
 355         .add            = mlx4_en_add,
 356         .remove         = mlx4_en_remove,
 357         .event          = mlx4_en_event,
 358         .get_dev        = mlx4_en_get_netdev,
 359         .protocol       = MLX4_PROT_ETH,
 360         .activate       = mlx4_en_activate,
 361 };
 362
 363 static void mlx4_en_verify_params(void)
 364 {
 365         if (pfctx > MAX_PFC_TX) {
 366                 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",
 367                         pfctx, MAX_PFC_TX);
 368                 pfctx = 0;
 369         }
 370
 371         if (pfcrx > MAX_PFC_RX) {
 372                 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",
 373                         pfcrx, MAX_PFC_RX);
 374                 pfcrx = 0;
 375         }
 376
 377         if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
 378                 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
 379                         inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
 380                 inline_thold = MAX_INLINE;
 381         }
 382 }
 383
 384 static int __init mlx4_en_init(void)
 385 {
 386         mlx4_en_verify_params();
 387         mlx4_en_init_ptys2ethtool_map();
 388
 389         return mlx4_register_interface(&mlx4_en_interface);
 390 }
 391
 392 static void __exit mlx4_en_cleanup(void)
 393 {
 394         mlx4_unregister_interface(&mlx4_en_interface);
 395 }
 396
 397 module_init(mlx4_en_init);
 398 module_exit(mlx4_en_cleanup);
 399