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