release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/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 /* Use a XOR rathern than Toeplitz hash function for RSS */
  67 MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS");
  68
  69 /* RSS hash type mask - default to <saddr, daddr, sport, dport> */
  70 MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask");
  71
  72 /* Number of LRO sessions per Rx ring (rounded up to a power of two) */
  73 MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS,
  74                  "Number of LRO sessions per ring or disabled (0)");
  75
  76 /* Priority pausing */
  77 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
  78                            " Per priority bit mask");
  79 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
  80                            " Per priority bit mask");
  81
  82 int en_print(const char *level, const struct mlx4_en_priv *priv,
  83              const char *format, ...)
  84 {
  85         va_list args;
  86         struct va_format vaf;
  87         int i;
  88
  89         va_start(args, format);
  90
  91         vaf.fmt = format;
  92         vaf.va = &args;
  93         if (priv->registered)
  94                 i = printk("%s%s: %s: %pV",
  95                            level, DRV_NAME, priv->dev->name, &vaf);
  96         else
  97                 i = printk("%s%s: %s: Port %d: %pV",
  98                            level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),
  99                            priv->port, &vaf);
 100         va_end(args);
 101
 102         return i;
 103 }
 104
 105 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
 106 {
 107         struct mlx4_en_profile *params = &mdev->profile;
 108         int i;
 109
 110         params->rss_xor = (rss_xor != 0);
 111         params->rss_mask = rss_mask & 0x1f;
 112         params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS);
 113         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
 114                 params->prof[i].rx_pause = 1;
 115                 params->prof[i].rx_ppp = pfcrx;
 116                 params->prof[i].tx_pause = 1;
 117                 params->prof[i].tx_ppp = pfctx;
 118                 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
 119                 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
 120                 params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
 121                         (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS;
 122         }
 123
 124         return 0;
 125 }
 126
 127 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
 128                           enum mlx4_dev_event event, int port)
 129 {
 130         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
 131         struct mlx4_en_priv *priv;
 132
 133         if (!mdev->pndev[port])
 134                 return;
 135
 136         priv = netdev_priv(mdev->pndev[port]);
 137         switch (event) {
 138         case MLX4_DEV_EVENT_PORT_UP:
 139         case MLX4_DEV_EVENT_PORT_DOWN:
 140                 /* To prevent races, we poll the link state in a separate
 141                   task rather than changing it here */
 142                 priv->link_state = event;
 143                 queue_work(mdev->workqueue, &priv->linkstate_task);
 144                 break;
 145
 146         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
 147                 mlx4_err(mdev, "Internal error detected, restarting device\n");
 148                 break;
 149
 150         default:
 151                 mlx4_warn(mdev, "Unhandled event: %d\n", event);
 152         }
 153 }
 154
 155 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
 156 {
 157         struct mlx4_en_dev *mdev = endev_ptr;
 158         int i;
 159
 160         mutex_lock(&mdev->state_lock);
 161         mdev->device_up = false;
 162         mutex_unlock(&mdev->state_lock);
 163
 164         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 165                 if (mdev->pndev[i])
 166                         mlx4_en_destroy_netdev(mdev->pndev[i]);
 167
 168         flush_workqueue(mdev->workqueue);
 169         destroy_workqueue(mdev->workqueue);
 170         mlx4_mr_free(dev, &mdev->mr);
 171         mlx4_uar_free(dev, &mdev->priv_uar);
 172         mlx4_pd_free(dev, mdev->priv_pdn);
 173         kfree(mdev);
 174 }
 175
 176 static void *mlx4_en_add(struct mlx4_dev *dev)
 177 {
 178         struct mlx4_en_dev *mdev;
 179         int i;
 180         int err;
 181
 182         printk_once(KERN_INFO "%s", mlx4_en_version);
 183
 184         mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
 185         if (!mdev) {
 186                 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
 187                         "aborting.\n");
 188                 err = -ENOMEM;
 189                 goto err_free_res;
 190         }
 191
 192         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
 193                 goto err_free_dev;
 194
 195         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
 196                 goto err_pd;
 197
 198         mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 199         if (!mdev->uar_map)
 200                 goto err_uar;
 201         spin_lock_init(&mdev->uar_lock);
 202
 203         mdev->dev = dev;
 204         mdev->dma_device = &(dev->pdev->dev);
 205         mdev->pdev = dev->pdev;
 206         mdev->device_up = false;
 207
 208         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
 209         if (!mdev->LSO_support)
 210                 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
 211                                 "FW version to enable LSO\n");
 212
 213         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
 214                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
 215                          0, 0, &mdev->mr)) {
 216                 mlx4_err(mdev, "Failed allocating memory region\n");
 217                 goto err_uar;
 218         }
 219         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
 220                 mlx4_err(mdev, "Failed enabling memory region\n");
 221                 goto err_mr;
 222         }
 223
 224         /* Build device profile according to supplied module parameters */
 225         err = mlx4_en_get_profile(mdev);
 226         if (err) {
 227                 mlx4_err(mdev, "Bad module parameters, aborting.\n");
 228                 goto err_mr;
 229         }
 230
 231         /* Configure wich ports to start according to module parameters */
 232         mdev->port_cnt = 0;
 233         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
 234                 mdev->port_cnt++;
 235
 236         /* If we did not receive an explicit number of Rx rings, default to
 237          * the number of completion vectors populated by the mlx4_core */
 238         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 239                 mlx4_info(mdev, "Using %d tx rings for port:%d\n",
 240                           mdev->profile.prof[i].tx_ring_num, i);
 241                 mdev->profile.prof[i].rx_ring_num = min_t(int,
 242                         roundup_pow_of_two(dev->caps.num_comp_vectors),
 243                         MAX_RX_RINGS);
 244                 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n",
 245                           mdev->profile.prof[i].rx_ring_num, i);
 246         }
 247
 248         /* Create our own workqueue for reset/multicast tasks
 249          * Note: we cannot use the shared workqueue because of deadlocks caused
 250          *       by the rtnl lock */
 251         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
 252         if (!mdev->workqueue) {
 253                 err = -ENOMEM;
 254                 goto err_mr;
 255         }
 256
 257         /* At this stage all non-port specific tasks are complete:
 258          * mark the card state as up */
 259         mutex_init(&mdev->state_lock);
 260         mdev->device_up = true;
 261
 262         /* Setup ports */
 263
 264         /* Create a netdev for each port */
 265         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 266                 mlx4_info(mdev, "Activating port:%d\n", i);
 267                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
 268                         mdev->pndev[i] = NULL;
 269         }
 270         return mdev;
 271
 272 err_mr:
 273         mlx4_mr_free(dev, &mdev->mr);
 274 err_uar:
 275         mlx4_uar_free(dev, &mdev->priv_uar);
 276 err_pd:
 277         mlx4_pd_free(dev, mdev->priv_pdn);
 278 err_free_dev:
 279         kfree(mdev);
 280 err_free_res:
 281         return NULL;
 282 }
 283
 284 static struct mlx4_interface mlx4_en_interface = {
 285         .add    = mlx4_en_add,
 286         .remove = mlx4_en_remove,
 287         .event  = mlx4_en_event,
 288 };
 289
 290 static int __init mlx4_en_init(void)
 291 {
 292         return mlx4_register_interface(&mlx4_en_interface);
 293 }
 294
 295 static void __exit mlx4_en_cleanup(void)
 296 {
 297         mlx4_unregister_interface(&mlx4_en_interface);
 298 }
 299
 300 module_init(mlx4_en_init);
 301 module_exit(mlx4_en_cleanup);