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
  66 /* Enable RSS TCP traffic */
  67 MLX4_EN_PARM_INT(tcp_rss, 1,
  68                  "Enable RSS for incomming TCP traffic or disabled (0)");
  69 /* Enable RSS UDP traffic */
  70 MLX4_EN_PARM_INT(udp_rss, 1,
  71                  "Enable RSS for incomming UDP traffic or disabled (0)");
  72
  73 /* Priority pausing */
  74 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
  75                            " Per priority bit mask");
  76 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
  77                            " Per priority bit mask");
  78
  79 int en_print(const char *level, const struct mlx4_en_priv *priv,
  80              const char *format, ...)
  81 {
  82         va_list args;
  83         struct va_format vaf;
  84         int i;
  85
  86         va_start(args, format);
  87
  88         vaf.fmt = format;
  89         vaf.va = &args;
  90         if (priv->registered)
  91                 i = printk("%s%s: %s: %pV",
  92                            level, DRV_NAME, priv->dev->name, &vaf);
  93         else
  94                 i = printk("%s%s: %s: Port %d: %pV",
  95                            level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
  96                            priv->port, &vaf);
  97         va_end(args);
  98
  99         return i;
 100 }
 101
 102 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
 103 {
 104         struct mlx4_en_profile *params = &mdev->profile;
 105         int i;
 106
 107         params->tcp_rss = tcp_rss;
 108         params->udp_rss = udp_rss;
 109         if (params->udp_rss && !(mdev->dev->caps.flags
 110                                         & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
 111                 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
 112                 params->udp_rss = 0;
 113         }
 114         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
 115                 params->prof[i].rx_pause = 1;
 116                 params->prof[i].rx_ppp = pfcrx;
 117                 params->prof[i].tx_pause = 1;
 118                 params->prof[i].tx_ppp = pfctx;
 119                 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
 120                 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
 121                 params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
 122                         (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
 123         }
 124
 125         return 0;
 126 }
 127
 128 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
 129 {
 130         struct mlx4_en_dev *endev = ctx;
 131
 132         return endev->pndev[port];
 133 }
 134
 135 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 136                           enum mlx4_dev_event event, int port)
 137 {
 138         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 139         struct mlx4_en_priv *priv;
 140
 141         if (!mdev->pndev[port])
 142                 return;
 143
 144         priv = netdev_priv(mdev->pndev[port]);
 145         switch (event) {
 146         case MLX4_DEV_EVENT_PORT_UP:
 147         case MLX4_DEV_EVENT_PORT_DOWN:
 148                 /* To prevent races, we poll the link state in a separate
 149                   task rather than changing it here */
 150                 priv->link_state = event;
 151                 queue_work(mdev->workqueue, &priv->linkstate_task);
 152                 break;
 153
 154         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 155                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 156                 break;
 157
 158         default:
 159                 mlx4_warn(mdev, "Unhandled event: %d\n", event);
 160         }
 161 }
 162
 163 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 164 {
 165         struct mlx4_en_dev *mdev = endev_ptr;
 166         int i;
 167
 168         mutex_lock(&mdev->state_lock);
 169         mdev->device_up = false;
 170         mutex_unlock(&mdev->state_lock);
 171
 172         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 173                 if (mdev->pndev[i])
 174                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 175
 176         flush_workqueue(mdev->workqueue);
 177         destroy_workqueue(mdev->workqueue);
 178         mlx4_mr_free(dev, &mdev->mr);
 179         mlx4_uar_free(dev, &mdev->priv_uar);
 180         mlx4_pd_free(dev, mdev->priv_pdn);
 181         kfree(mdev);
 182 }
 183
 184 static void *mlx4_en_add(struct mlx4_dev *dev)
 185 {
 186         struct mlx4_en_dev *mdev;
 187         int i;
 188         int err;
 189
 190         printk_once(KERN_INFO "%s", mlx4_en_version);
 191
 192         mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
 193         if (!mdev) {
 194                 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
 195                         "aborting.\n");
 196                 err = -ENOMEM;
 197                 goto err_free_res;
 198         }
 199
 200         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 201                 goto err_free_dev;
 202
 203         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 204                 goto err_pd;
 205
 206         mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
 207                                 PAGE_SIZE);
 208         if (!mdev->uar_map)
 209                 goto err_uar;
 210         spin_lock_init(&mdev->uar_lock);
 211
 212         mdev->dev = dev;
 213         mdev->dma_device = &(dev->pdev->dev);
 214         mdev->pdev = dev->pdev;
 215         mdev->device_up = false;
 216
 217         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 218         if (!mdev->LSO_support)
 219                 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
 220                                 "FW version to enable LSO\n");
 221
 222         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 223                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 224                          0, 0, &mdev->mr)) {
 225                 mlx4_err(mdev, "Failed allocating memory region\n");
 226                 goto err_uar;
 227         }
 228         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 229                 mlx4_err(mdev, "Failed enabling memory region\n");
 230                 goto err_mr;
 231         }
 232
 233         /* Build device profile according to supplied module parameters */
 234         err = mlx4_en_get_profile(mdev);
 235         if (err) {
 236                 mlx4_err(mdev, "Bad module parameters, aborting.\n");
 237                 goto err_mr;
 238         }
 239
 240         /* Configure which ports to start according to module parameters */
 241         mdev->port_cnt = 0;
 242         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 243                 mdev->port_cnt++;
 244
 245         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 246                 if (!dev->caps.comp_pool) {
 247                         mdev->profile.prof[i].rx_ring_num =
 248                                 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
 249                                                            min_t(int,
 250                                                                  dev->caps.num_comp_vectors,
 251                                                                  MAX_RX_RINGS)));
 252                 } else {
 253                         mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
 254                                 min_t(int, dev->caps.comp_pool/
 255                                       dev->caps.num_ports - 1 , MAX_MSIX_P_PORT - 1));
 256                 }
 257         }
 258
 259         /* Create our own workqueue for reset/multicast tasks
 260          * Note: we cannot use the shared workqueue because of deadlocks caused
 261          *       by the rtnl lock */
 262         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 263         if (!mdev->workqueue) {
 264                 err = -ENOMEM;
 265                 goto err_mr;
 266         }
 267
 268         /* At this stage all non-port specific tasks are complete:
 269          * mark the card state as up */
 270         mutex_init(&mdev->state_lock);
 271         mdev->device_up = true;
 272
 273         /* Setup ports */
 274
 275         /* Create a netdev for each port */
 276         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 277                 mlx4_info(mdev, "Activating port:%d\n", i);
 278                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
 279                         mdev->pndev[i] = NULL;
 280         }
 281         return mdev;
 282
 283 err_mr:
 284         mlx4_mr_free(dev, &mdev->mr);
 285 err_uar:
 286         mlx4_uar_free(dev, &mdev->priv_uar);
 287 err_pd:
 288         mlx4_pd_free(dev, mdev->priv_pdn);
 289 err_free_dev:
 290         kfree(mdev);
 291 err_free_res:
 292         return NULL;
 293 }
 294
 295 static struct mlx4_interface mlx4_en_interface = {
 296         .add            = mlx4_en_add,
 297         .remove         = mlx4_en_remove,
 298         .event          = mlx4_en_event,
 299         .get_dev        = mlx4_en_get_netdev,
 300         .protocol       = MLX4_PROT_ETH,
 301 };
 302
 303 static int __init mlx4_en_init(void)
 304 {
 305         return mlx4_register_interface(&mlx4_en_interface);
 306 }
 307
 308 static void __exit mlx4_en_cleanup(void)
 309 {
 310         mlx4_unregister_interface(&mlx4_en_interface);
 311 }
 312
 313 module_init(mlx4_en_init);
 314 module_exit(mlx4_en_cleanup);
 315