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 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 int 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         int i;
  87
  88         va_start(args, format);
  89
  90         vaf.fmt = format;
  91         vaf.va = &args;
  92         if (priv->registered)
  93                 i = printk("%s%s: %s: %pV",
  94                            level, DRV_NAME, priv->dev->name, &vaf);
  95         else
  96                 i = printk("%s%s: %s: Port %d: %pV",
  97                            level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
  98                            priv->port, &vaf);
  99         va_end(args);
 100
 101         return i;
 102 }
 103
 104 void mlx4_en_update_loopback_state(struct net_device *dev,
 105                                    netdev_features_t features)
 106 {
 107         struct mlx4_en_priv *priv = netdev_priv(dev);
 108
 109         priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
 110                         MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
 111
 112         /* Drop the packet if SRIOV is not enabled
 113          * and not performing the selftest or flb disabled
 114          */
 115         if (mlx4_is_mfunc(priv->mdev->dev) &&
 116             !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
 117                 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
 118
 119         /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
 120          * is requested
 121          */
 122         if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
 123                 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
 124 }
 125
 126 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
 127 {
 128         struct mlx4_en_profile *params = &mdev->profile;
 129         int i;
 130
 131         params->udp_rss = udp_rss;
 132         params->num_tx_rings_p_up = min_t(int, num_online_cpus(),
 133                         MLX4_EN_MAX_TX_RING_P_UP);
 134         if (params->udp_rss && !(mdev->dev->caps.flags
 135                                         & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
 136                 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
 137                 params->udp_rss = 0;
 138         }
 139         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
 140                 params->prof[i].rx_pause = 1;
 141                 params->prof[i].rx_ppp = pfcrx;
 142                 params->prof[i].tx_pause = 1;
 143                 params->prof[i].tx_ppp = pfctx;
 144                 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
 145                 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
 146                 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
 147                         MLX4_EN_NUM_UP;
 148                 params->prof[i].rss_rings = 0;
 149                 params->prof[i].inline_thold = inline_thold;
 150         }
 151
 152         return 0;
 153 }
 154
 155 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
 156 {
 157         struct mlx4_en_dev *endev = ctx;
 158
 159         return endev->pndev[port];
 160 }
 161
 162 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 163                           enum mlx4_dev_event event, unsigned long port)
 164 {
 165         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 166         struct mlx4_en_priv *priv;
 167
 168         switch (event) {
 169         case MLX4_DEV_EVENT_PORT_UP:
 170         case MLX4_DEV_EVENT_PORT_DOWN:
 171                 if (!mdev->pndev[port])
 172                         return;
 173                 priv = netdev_priv(mdev->pndev[port]);
 174                 /* To prevent races, we poll the link state in a separate
 175                   task rather than changing it here */
 176                 priv->link_state = event;
 177                 queue_work(mdev->workqueue, &priv->linkstate_task);
 178                 break;
 179
 180         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 181                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 182                 break;
 183
 184         case MLX4_DEV_EVENT_SLAVE_INIT:
 185         case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
 186                 break;
 187         default:
 188                 if (port < 1 || port > dev->caps.num_ports ||
 189                     !mdev->pndev[port])
 190                         return;
 191                 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
 192                           (int) port);
 193         }
 194 }
 195
 196 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 197 {
 198         struct mlx4_en_dev *mdev = endev_ptr;
 199         int i;
 200
 201         mutex_lock(&mdev->state_lock);
 202         mdev->device_up = false;
 203         mutex_unlock(&mdev->state_lock);
 204
 205         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 206                 if (mdev->pndev[i])
 207                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 208
 209         if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
 210                 mlx4_en_remove_timestamp(mdev);
 211
 212         flush_workqueue(mdev->workqueue);
 213         destroy_workqueue(mdev->workqueue);
 214         (void) mlx4_mr_free(dev, &mdev->mr);
 215         iounmap(mdev->uar_map);
 216         mlx4_uar_free(dev, &mdev->priv_uar);
 217         mlx4_pd_free(dev, mdev->priv_pdn);
 218         kfree(mdev);
 219 }
 220
 221 static void *mlx4_en_add(struct mlx4_dev *dev)
 222 {
 223         struct mlx4_en_dev *mdev;
 224         int i;
 225         int err;
 226
 227         printk_once(KERN_INFO "%s", mlx4_en_version);
 228
 229         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 230         if (!mdev) {
 231                 err = -ENOMEM;
 232                 goto err_free_res;
 233         }
 234
 235         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 236                 goto err_free_dev;
 237
 238         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 239                 goto err_pd;
 240
 241         mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
 242                                 PAGE_SIZE);
 243         if (!mdev->uar_map)
 244                 goto err_uar;
 245         spin_lock_init(&mdev->uar_lock);
 246
 247         mdev->dev = dev;
 248         mdev->dma_device = &(dev->pdev->dev);
 249         mdev->pdev = dev->pdev;
 250         mdev->device_up = false;
 251
 252         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 253         if (!mdev->LSO_support)
 254                 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
 255                                 "FW version to enable LSO\n");
 256
 257         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 258                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 259                          0, 0, &mdev->mr)) {
 260                 mlx4_err(mdev, "Failed allocating memory region\n");
 261                 goto err_map;
 262         }
 263         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 264                 mlx4_err(mdev, "Failed enabling memory region\n");
 265                 goto err_mr;
 266         }
 267
 268         /* Build device profile according to supplied module parameters */
 269         err = mlx4_en_get_profile(mdev);
 270         if (err) {
 271                 mlx4_err(mdev, "Bad module parameters, aborting.\n");
 272                 goto err_mr;
 273         }
 274
 275         /* Configure which ports to start according to module parameters */
 276         mdev->port_cnt = 0;
 277         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 278                 mdev->port_cnt++;
 279
 280         /* Initialize time stamp mechanism */
 281         if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
 282                 mlx4_en_init_timestamp(mdev);
 283
 284         /* Set default number of RX rings*/
 285         mlx4_en_set_num_rx_rings(mdev);
 286
 287         /* Create our own workqueue for reset/multicast tasks
 288          * Note: we cannot use the shared workqueue because of deadlocks caused
 289          *       by the rtnl lock */
 290         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 291         if (!mdev->workqueue) {
 292                 err = -ENOMEM;
 293                 goto err_mr;
 294         }
 295
 296         /* At this stage all non-port specific tasks are complete:
 297          * mark the card state as up */
 298         mutex_init(&mdev->state_lock);
 299         mdev->device_up = true;
 300
 301         /* Setup ports */
 302
 303         /* Create a netdev for each port */
 304         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 305                 mlx4_info(mdev, "Activating port:%d\n", i);
 306                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
 307                         mdev->pndev[i] = NULL;
 308         }
 309
 310         return mdev;
 311
 312 err_mr:
 313         (void) mlx4_mr_free(dev, &mdev->mr);
 314 err_map:
 315         if (mdev->uar_map)
 316                 iounmap(mdev->uar_map);
 317 err_uar:
 318         mlx4_uar_free(dev, &mdev->priv_uar);
 319 err_pd:
 320         mlx4_pd_free(dev, mdev->priv_pdn);
 321 err_free_dev:
 322         kfree(mdev);
 323 err_free_res:
 324         return NULL;
 325 }
 326
 327 static struct mlx4_interface mlx4_en_interface = {
 328         .add            = mlx4_en_add,
 329         .remove         = mlx4_en_remove,
 330         .event          = mlx4_en_event,
 331         .get_dev        = mlx4_en_get_netdev,
 332         .protocol       = MLX4_PROT_ETH,
 333 };
 334
 335 static void mlx4_en_verify_params(void)
 336 {
 337         if (pfctx > MAX_PFC_TX) {
 338                 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",
 339                         pfctx, MAX_PFC_TX);
 340                 pfctx = 0;
 341         }
 342
 343         if (pfcrx > MAX_PFC_RX) {
 344                 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",
 345                         pfcrx, MAX_PFC_RX);
 346                 pfcrx = 0;
 347         }
 348
 349         if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
 350                 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
 351                         inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
 352                 inline_thold = MAX_INLINE;
 353         }
 354 }
 355
 356 static int __init mlx4_en_init(void)
 357 {
 358         mlx4_en_verify_params();
 359
 360         return mlx4_register_interface(&mlx4_en_interface);
 361 }
 362
 363 static void __exit mlx4_en_cleanup(void)
 364 {
 365         mlx4_unregister_interface(&mlx4_en_interface);
 366 }
 367
 368 module_init(mlx4_en_init);
 369 module_exit(mlx4_en_cleanup);
 370