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 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         priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|
 107                         MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);
 108
 109         /* Drop the packet if SRIOV is not enabled
 110          * and not performing the selftest or flb disabled
 111          */
 112         if (mlx4_is_mfunc(priv->mdev->dev) &&
 113             !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)
 114                 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;
 115
 116         /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
 117          * is requested
 118          */
 119         if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)
 120                 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;
 121 }
 122
 123 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
 124 {
 125         struct mlx4_en_profile *params = &mdev->profile;
 126         int i;
 127
 128         params->udp_rss = udp_rss;
 129         params->num_tx_rings_p_up = mlx4_low_memory_profile() ?
 130                 MLX4_EN_MIN_TX_RING_P_UP :
 131                 min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);
 132
 133         if (params->udp_rss && !(mdev->dev->caps.flags
 134                                         & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
 135                 mlx4_warn(mdev, "UDP RSS is not supported on this device\n");
 136                 params->udp_rss = 0;
 137         }
 138         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
 139                 params->prof[i].rx_pause = 1;
 140                 params->prof[i].rx_ppp = pfcrx;
 141                 params->prof[i].tx_pause = 1;
 142                 params->prof[i].tx_ppp = pfctx;
 143                 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
 144                 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
 145                 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
 146                         MLX4_EN_NUM_UP;
 147                 params->prof[i].rss_rings = 0;
 148                 params->prof[i].inline_thold = inline_thold;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
 155 {
 156         struct mlx4_en_dev *endev = ctx;
 157
 158         return endev->pndev[port];
 159 }
 160
 161 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 162                           enum mlx4_dev_event event, unsigned long port)
 163 {
 164         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 165         struct mlx4_en_priv *priv;
 166
 167         switch (event) {
 168         case MLX4_DEV_EVENT_PORT_UP:
 169         case MLX4_DEV_EVENT_PORT_DOWN:
 170                 if (!mdev->pndev[port])
 171                         return;
 172                 priv = netdev_priv(mdev->pndev[port]);
 173                 /* To prevent races, we poll the link state in a separate
 174                   task rather than changing it here */
 175                 priv->link_state = event;
 176                 queue_work(mdev->workqueue, &priv->linkstate_task);
 177                 break;
 178
 179         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 180                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 181                 break;
 182
 183         case MLX4_DEV_EVENT_SLAVE_INIT:
 184         case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
 185                 break;
 186         default:
 187                 if (port < 1 || port > dev->caps.num_ports ||
 188                     !mdev->pndev[port])
 189                         return;
 190                 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
 191                           (int) port);
 192         }
 193 }
 194
 195 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 196 {
 197         struct mlx4_en_dev *mdev = endev_ptr;
 198         int i;
 199
 200         mutex_lock(&mdev->state_lock);
 201         mdev->device_up = false;
 202         mutex_unlock(&mdev->state_lock);
 203
 204         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 205                 if (mdev->pndev[i])
 206                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 207
 208         if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
 209                 mlx4_en_remove_timestamp(mdev);
 210
 211         flush_workqueue(mdev->workqueue);
 212         destroy_workqueue(mdev->workqueue);
 213         (void) mlx4_mr_free(dev, &mdev->mr);
 214         iounmap(mdev->uar_map);
 215         mlx4_uar_free(dev, &mdev->priv_uar);
 216         mlx4_pd_free(dev, mdev->priv_pdn);
 217         kfree(mdev);
 218 }
 219
 220 static void *mlx4_en_add(struct mlx4_dev *dev)
 221 {
 222         struct mlx4_en_dev *mdev;
 223         int i;
 224         int err;
 225
 226         printk_once(KERN_INFO "%s", mlx4_en_version);
 227
 228         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
 229         if (!mdev) {
 230                 err = -ENOMEM;
 231                 goto err_free_res;
 232         }
 233
 234         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 235                 goto err_free_dev;
 236
 237         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 238                 goto err_pd;
 239
 240         mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
 241                                 PAGE_SIZE);
 242         if (!mdev->uar_map)
 243                 goto err_uar;
 244         spin_lock_init(&mdev->uar_lock);
 245
 246         mdev->dev = dev;
 247         mdev->dma_device = &(dev->pdev->dev);
 248         mdev->pdev = dev->pdev;
 249         mdev->device_up = false;
 250
 251         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 252         if (!mdev->LSO_support)
 253                 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");
 254
 255         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 256                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 257                          0, 0, &mdev->mr)) {
 258                 mlx4_err(mdev, "Failed allocating memory region\n");
 259                 goto err_map;
 260         }
 261         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 262                 mlx4_err(mdev, "Failed enabling memory region\n");
 263                 goto err_mr;
 264         }
 265
 266         /* Build device profile according to supplied module parameters */
 267         err = mlx4_en_get_profile(mdev);
 268         if (err) {
 269                 mlx4_err(mdev, "Bad module parameters, aborting\n");
 270                 goto err_mr;
 271         }
 272
 273         /* Configure which ports to start according to module parameters */
 274         mdev->port_cnt = 0;
 275         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 276                 mdev->port_cnt++;
 277
 278         /* Initialize time stamp mechanism */
 279         if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
 280                 mlx4_en_init_timestamp(mdev);
 281
 282         /* Set default number of RX rings*/
 283         mlx4_en_set_num_rx_rings(mdev);
 284
 285         /* Create our own workqueue for reset/multicast tasks
 286          * Note: we cannot use the shared workqueue because of deadlocks caused
 287          *       by the rtnl lock */
 288         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 289         if (!mdev->workqueue) {
 290                 err = -ENOMEM;
 291                 goto err_mr;
 292         }
 293
 294         /* At this stage all non-port specific tasks are complete:
 295          * mark the card state as up */
 296         mutex_init(&mdev->state_lock);
 297         mdev->device_up = true;
 298
 299         /* Setup ports */
 300
 301         /* Create a netdev for each port */
 302         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 303                 mlx4_info(mdev, "Activating port:%d\n", i);
 304                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
 305                         mdev->pndev[i] = NULL;
 306         }
 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 void mlx4_en_verify_params(void)
 334 {
 335         if (pfctx > MAX_PFC_TX) {
 336                 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",
 337                         pfctx, MAX_PFC_TX);
 338                 pfctx = 0;
 339         }
 340
 341         if (pfcrx > MAX_PFC_RX) {
 342                 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",
 343                         pfcrx, MAX_PFC_RX);
 344                 pfcrx = 0;
 345         }
 346
 347         if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
 348                 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
 349                         inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
 350                 inline_thold = MAX_INLINE;
 351         }
 352 }
 353
 354 static int __init mlx4_en_init(void)
 355 {
 356         mlx4_en_verify_params();
 357
 358         return mlx4_register_interface(&mlx4_en_interface);
 359 }
 360
 361 static void __exit mlx4_en_cleanup(void)
 362 {
 363         mlx4_unregister_interface(&mlx4_en_interface);
 364 }
 365
 366 module_init(mlx4_en_init);
 367 module_exit(mlx4_en_cleanup);
 368