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 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
  99 {
 100         struct mlx4_en_profile *params = &mdev->profile;
 101         int i;
 102
 103         params->udp_rss = udp_rss;
 104         params->num_tx_rings_p_up = min_t(int, num_online_cpus(),
 105                         MLX4_EN_MAX_TX_RING_P_UP);
 106         if (params->udp_rss && !(mdev->dev->caps.flags
 107                                         & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
 108                 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
 109                 params->udp_rss = 0;
 110         }
 111         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
 112                 params->prof[i].rx_pause = 1;
 113                 params->prof[i].rx_ppp = pfcrx;
 114                 params->prof[i].tx_pause = 1;
 115                 params->prof[i].tx_ppp = pfctx;
 116                 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
 117                 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
 118                 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
 119                         MLX4_EN_NUM_UP;
 120                 params->prof[i].rss_rings = 0;
 121         }
 122
 123         return 0;
 124 }
 125
 126 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
 127 {
 128         struct mlx4_en_dev *endev = ctx;
 129
 130         return endev->pndev[port];
 131 }
 132
 133 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 134                           enum mlx4_dev_event event, unsigned long port)
 135 {
 136         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 137         struct mlx4_en_priv *priv;
 138
 139         switch (event) {
 140         case MLX4_DEV_EVENT_PORT_UP:
 141         case MLX4_DEV_EVENT_PORT_DOWN:
 142                 if (!mdev->pndev[port])
 143                         return;
 144                 priv = netdev_priv(mdev->pndev[port]);
 145                 /* To prevent races, we poll the link state in a separate
 146                   task rather than changing it here */
 147                 priv->link_state = event;
 148                 queue_work(mdev->workqueue, &priv->linkstate_task);
 149                 break;
 150
 151         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 152                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 153                 break;
 154
 155         default:
 156                 if (port < 1 || port > dev->caps.num_ports ||
 157                     !mdev->pndev[port])
 158                         return;
 159                 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
 160                           (int) port);
 161         }
 162 }
 163
 164 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 165 {
 166         struct mlx4_en_dev *mdev = endev_ptr;
 167         int i;
 168
 169         mutex_lock(&mdev->state_lock);
 170         mdev->device_up = false;
 171         mutex_unlock(&mdev->state_lock);
 172
 173         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 174                 if (mdev->pndev[i])
 175                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 176
 177         flush_workqueue(mdev->workqueue);
 178         destroy_workqueue(mdev->workqueue);
 179         mlx4_mr_free(dev, &mdev->mr);
 180         iounmap(mdev->uar_map);
 181         mlx4_uar_free(dev, &mdev->priv_uar);
 182         mlx4_pd_free(dev, mdev->priv_pdn);
 183         kfree(mdev);
 184 }
 185
 186 static void *mlx4_en_add(struct mlx4_dev *dev)
 187 {
 188         struct mlx4_en_dev *mdev;
 189         int i;
 190         int err;
 191
 192         printk_once(KERN_INFO "%s", mlx4_en_version);
 193
 194         mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
 195         if (!mdev) {
 196                 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
 197                         "aborting.\n");
 198                 err = -ENOMEM;
 199                 goto err_free_res;
 200         }
 201
 202         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 203                 goto err_free_dev;
 204
 205         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 206                 goto err_pd;
 207
 208         mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
 209                                 PAGE_SIZE);
 210         if (!mdev->uar_map)
 211                 goto err_uar;
 212         spin_lock_init(&mdev->uar_lock);
 213
 214         mdev->dev = dev;
 215         mdev->dma_device = &(dev->pdev->dev);
 216         mdev->pdev = dev->pdev;
 217         mdev->device_up = false;
 218
 219         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 220         if (!mdev->LSO_support)
 221                 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
 222                                 "FW version to enable LSO\n");
 223
 224         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 225                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 226                          0, 0, &mdev->mr)) {
 227                 mlx4_err(mdev, "Failed allocating memory region\n");
 228                 goto err_map;
 229         }
 230         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 231                 mlx4_err(mdev, "Failed enabling memory region\n");
 232                 goto err_mr;
 233         }
 234
 235         /* Build device profile according to supplied module parameters */
 236         err = mlx4_en_get_profile(mdev);
 237         if (err) {
 238                 mlx4_err(mdev, "Bad module parameters, aborting.\n");
 239                 goto err_mr;
 240         }
 241
 242         /* Configure which ports to start according to module parameters */
 243         mdev->port_cnt = 0;
 244         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 245                 mdev->port_cnt++;
 246
 247         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 248                 if (!dev->caps.comp_pool) {
 249                         mdev->profile.prof[i].rx_ring_num =
 250                                 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
 251                                                            min_t(int,
 252                                                                  dev->caps.num_comp_vectors,
 253                                                                  DEF_RX_RINGS)));
 254                 } else {
 255                         mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
 256                                 min_t(int, dev->caps.comp_pool/
 257                                       dev->caps.num_ports - 1 , MAX_MSIX_P_PORT - 1));
 258                 }
 259         }
 260
 261         /* Create our own workqueue for reset/multicast tasks
 262          * Note: we cannot use the shared workqueue because of deadlocks caused
 263          *       by the rtnl lock */
 264         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 265         if (!mdev->workqueue) {
 266                 err = -ENOMEM;
 267                 goto err_mr;
 268         }
 269
 270         /* At this stage all non-port specific tasks are complete:
 271          * mark the card state as up */
 272         mutex_init(&mdev->state_lock);
 273         mdev->device_up = true;
 274
 275         /* Setup ports */
 276
 277         /* Create a netdev for each port */
 278         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 279                 mlx4_info(mdev, "Activating port:%d\n", i);
 280                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
 281                         mdev->pndev[i] = NULL;
 282         }
 283         return mdev;
 284
 285 err_mr:
 286         mlx4_mr_free(dev, &mdev->mr);
 287 err_map:
 288         if (!mdev->uar_map)
 289                 iounmap(mdev->uar_map);
 290 err_uar:
 291         mlx4_uar_free(dev, &mdev->priv_uar);
 292 err_pd:
 293         mlx4_pd_free(dev, mdev->priv_pdn);
 294 err_free_dev:
 295         kfree(mdev);
 296 err_free_res:
 297         return NULL;
 298 }
 299
 300 static struct mlx4_interface mlx4_en_interface = {
 301         .add            = mlx4_en_add,
 302         .remove         = mlx4_en_remove,
 303         .event          = mlx4_en_event,
 304         .get_dev        = mlx4_en_get_netdev,
 305         .protocol       = MLX4_PROT_ETH,
 306 };
 307
 308 static int __init mlx4_en_init(void)
 309 {
 310         return mlx4_register_interface(&mlx4_en_interface);
 311 }
 312
 313 static void __exit mlx4_en_cleanup(void)
 314 {
 315         mlx4_unregister_interface(&mlx4_en_interface);
 316 }
 317
 318 module_init(mlx4_en_init);
 319 module_exit(mlx4_en_cleanup);
 320