mlx4_en_main.c

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    1 /*
    2  * Copyright (c) 2007, 2014 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 #define LINUXKPI_PARAM_PREFIX mlx4_
   35 
   36 #include <linux/module.h>
   37 #include <linux/delay.h>
   38 #include <linux/netdevice.h>
   39 #include <linux/slab.h>
   40 
   41 #include <dev/mlx4/driver.h>
   42 #include <dev/mlx4/device.h>
   43 #include <dev/mlx4/cmd.h>
   44 
   45 #include "en.h"
   46 
   47 /* Mellanox ConnectX HCA Ethernet driver */
   48 
   49 #define MLX4_EN_PARM_INT(X, def_val, desc) \
   50         static unsigned int X = def_val;\
   51         module_param(X , uint, 0444); \
   52         MODULE_PARM_DESC(X, desc);
   53 
   54 
   55 /*
   56  * Device scope module parameters
   57  */
   58 
   59 /* Enable RSS UDP traffic */
   60 MLX4_EN_PARM_INT(udp_rss, 1,
   61                  "Enable RSS for incoming UDP traffic or disabled (0)");
   62 
   63 /* Priority pausing */
   64 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."
   65                            " Per priority bit mask");
   66 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."
   67                            " Per priority bit mask");
   68 
   69 MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,
   70                  "Threshold for using inline data (range: 17-104, default: 104)");
   71 
   72 #define MAX_PFC_TX     0xff
   73 #define MAX_PFC_RX     0xff
   74 
   75 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
   76 {
   77         struct mlx4_en_profile *params = &mdev->profile;
   78         int i;
   79 
   80         params->udp_rss = udp_rss;
   81         params->num_tx_rings_p_up = min_t(int, mp_ncpus,
   82                         MLX4_EN_MAX_TX_RING_P_UP);
   83         if (params->udp_rss && !(mdev->dev->caps.flags
   84                                         & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
   85                 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
   86                 params->udp_rss = 0;
   87         }
   88         for (i = 1; i <= MLX4_MAX_PORTS; i++) {
   89                 params->prof[i].rx_pause = 1;
   90                 params->prof[i].rx_ppp = pfcrx;
   91                 params->prof[i].tx_pause = 1;
   92                 params->prof[i].tx_ppp = pfctx;
   93                 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
   94                 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
   95                 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
   96                         MLX4_EN_NUM_UP;
   97                 params->prof[i].rss_rings = 0;
   98                 params->prof[i].inline_thold = inline_thold;
   99         }
  100 
  101         return 0;
  102 }
  103 
  104 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
  105 {
  106         struct mlx4_en_dev *endev = ctx;
  107 
  108         return endev->pndev[port];
  109 }
  110 
  111 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
  112                           enum mlx4_dev_event event, unsigned long port)
  113 {
  114         struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
  115         struct mlx4_en_priv *priv;
  116 
  117         switch (event) {
  118         case MLX4_DEV_EVENT_PORT_UP:
  119         case MLX4_DEV_EVENT_PORT_DOWN:
  120                 if (!mdev->pndev[port])
  121                         return;
  122                 priv = mlx4_netdev_priv(mdev->pndev[port]);
  123                 /* To prevent races, we poll the link state in a separate
  124                   task rather than changing it here */
  125                 priv->link_state = event;
  126                 queue_work(mdev->workqueue, &priv->linkstate_task);
  127                 break;
  128 
  129         case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
  130                 mlx4_err(mdev, "Internal error detected, restarting device\n");
  131                 break;
  132 
  133         case MLX4_DEV_EVENT_SLAVE_INIT:
  134         case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
  135                 break;
  136         default:
  137                 if (port < 1 || port > dev->caps.num_ports ||
  138                     !mdev->pndev[port])
  139                         return;
  140                 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
  141                           (int) port);
  142         }
  143 }
  144 
  145 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
  146 {
  147         struct mlx4_en_dev *mdev = endev_ptr;
  148         int i;
  149 
  150         mutex_lock(&mdev->state_lock);
  151         mdev->device_up = false;
  152         mutex_unlock(&mdev->state_lock);
  153 
  154         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
  155                 if (mdev->pndev[i])
  156                         mlx4_en_destroy_netdev(mdev->pndev[i]);
  157 
  158         flush_workqueue(mdev->workqueue);
  159         destroy_workqueue(mdev->workqueue);
  160         (void) mlx4_mr_free(dev, &mdev->mr);
  161         iounmap(mdev->uar_map);
  162         mlx4_uar_free(dev, &mdev->priv_uar);
  163         mlx4_pd_free(dev, mdev->priv_pdn);
  164         kfree(mdev);
  165 }
  166 
  167 static void mlx4_en_activate(struct mlx4_dev *dev, void *ctx)
  168 {
  169         int i;
  170         struct mlx4_en_dev *mdev = ctx;
  171 
  172         /* Create a netdev for each port */
  173         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
  174                 mlx4_info(mdev, "Activating port:%d\n", i);
  175                 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
  176                         mdev->pndev[i] = NULL;
  177         }
  178 }
  179 
  180 static void *mlx4_en_add(struct mlx4_dev *dev)
  181 {
  182         struct mlx4_en_dev *mdev;
  183         int i;
  184 
  185         mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
  186         if (!mdev)
  187                 goto err_free_res;
  188 
  189         if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
  190                 goto err_free_dev;
  191 
  192         if (mlx4_uar_alloc(dev, &mdev->priv_uar))
  193                 goto err_pd;
  194 
  195         mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
  196                                 PAGE_SIZE);
  197         if (!mdev->uar_map)
  198                 goto err_uar;
  199         spin_lock_init(&mdev->uar_lock);
  200 
  201         mdev->dev = dev;
  202         mdev->dma_device = &dev->persist->pdev->dev;
  203         mdev->pdev = dev->persist->pdev;
  204         mdev->device_up = false;
  205 
  206         mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
  207         if (!mdev->LSO_support)
  208                 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
  209                                 "FW version to enable LSO\n");
  210 
  211         if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
  212                          MLX4_PERM_LOCAL_WRITE |  MLX4_PERM_LOCAL_READ,
  213                          0, 0, &mdev->mr)) {
  214                 mlx4_err(mdev, "Failed allocating memory region\n");
  215                 goto err_map;
  216         }
  217         if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
  218                 mlx4_err(mdev, "Failed enabling memory region\n");
  219                 goto err_mr;
  220         }
  221 
  222         /* Build device profile according to supplied module parameters */
  223         if (mlx4_en_get_profile(mdev)) {
  224                 mlx4_err(mdev, "Bad module parameters, aborting\n");
  225                 goto err_mr;
  226         }
  227 
  228         /* Configure which ports to start according to module parameters */
  229         mdev->port_cnt = 0;
  230         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
  231                 mdev->port_cnt++;
  232 
  233         /* Set default number of RX rings*/
  234         mlx4_en_set_num_rx_rings(mdev);
  235 
  236         /* Create our own workqueue for reset/multicast tasks
  237          * Note: we cannot use the shared workqueue because of deadlocks caused
  238          *       by the rtnl lock */
  239         mdev->workqueue = create_singlethread_workqueue("mlx4_en");
  240         if (!mdev->workqueue)
  241                 goto err_mr;
  242 
  243         /* At this stage all non-port specific tasks are complete:
  244          * mark the card state as up */
  245         mutex_init(&mdev->state_lock);
  246         mdev->device_up = true;
  247 
  248         return mdev;
  249 
  250 err_mr:
  251         (void) mlx4_mr_free(dev, &mdev->mr);
  252 err_map:
  253         if (mdev->uar_map)
  254                 iounmap(mdev->uar_map);
  255 err_uar:
  256         mlx4_uar_free(dev, &mdev->priv_uar);
  257 err_pd:
  258         mlx4_pd_free(dev, mdev->priv_pdn);
  259 err_free_dev:
  260         kfree(mdev);
  261 err_free_res:
  262         return NULL;
  263 }
  264 
  265 static struct mlx4_interface mlx4_en_interface = {
  266         .add            = mlx4_en_add,
  267         .remove         = mlx4_en_remove,
  268         .event          = mlx4_en_event,
  269         .get_dev        = mlx4_en_get_netdev,
  270         .protocol       = MLX4_PROT_ETH,
  271         .activate       = mlx4_en_activate,
  272 };
  273 
  274 static void mlx4_en_verify_params(void)
  275 {
  276         if (pfctx > MAX_PFC_TX) {
  277                 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",
  278                         pfctx, MAX_PFC_TX);
  279                 pfctx = 0;
  280         }
  281 
  282         if (pfcrx > MAX_PFC_RX) {
  283                 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",
  284                         pfcrx, MAX_PFC_RX);
  285                 pfcrx = 0;
  286         }
  287 
  288         if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {
  289                 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",
  290                         inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);
  291                 inline_thold = MAX_INLINE;
  292         }
  293 }
  294 
  295 static int __init mlx4_en_init(void)
  296 {
  297         mlx4_en_verify_params();
  298 
  299         return mlx4_register_interface(&mlx4_en_interface);
  300 }
  301 
  302 static void __exit mlx4_en_cleanup(void)
  303 {
  304         mlx4_unregister_interface(&mlx4_en_interface);
  305 }
  306 
  307 module_init_order(mlx4_en_init, SI_ORDER_SIXTH);
  308 module_exit_order(mlx4_en_cleanup, SI_ORDER_SIXTH);
  309 
  310 static int
  311 mlx4en_evhand(module_t mod, int event, void *arg)
  312 {
  313         return (0);
  314 }
  315 static moduledata_t mlx4en_mod = {
  316         .name = "mlx4en",
  317         .evhand = mlx4en_evhand,
  318 };
  319 DECLARE_MODULE(mlx4en, mlx4en_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY);
  320 MODULE_DEPEND(mlx4en, mlx4, 1, 1, 1);
  321 MODULE_DEPEND(mlx4en, linuxkpi, 1, 1, 1);
Cache object: e5b553ce103f2f2751d45d371d06df7a
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FreeBSD/Linux Kernel Cross Reference sys/dev/mlx4/mlx4_en/mlx4_en_main.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx4/mlx4_en/mlx4_en_main.c
