drivers/net/mlx5/mlx5_trigger.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2015 6WIND S.A.
   5  *   Copyright 2015 Mellanox.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of 6WIND S.A. nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <rte_ether.h>
  35 #include <rte_ethdev.h>
  36 #include <rte_interrupts.h>
  37 #include <rte_alarm.h>
  38
  39 #include "mlx5.h"
  40 #include "mlx5_rxtx.h"
  41 #include "mlx5_utils.h"
  42
  43 /**
  44  * DPDK callback to start the device.
  45  *
  46  * Simulate device start by attaching all configured flows.
  47  *
  48  * @param dev
  49  *   Pointer to Ethernet device structure.
  50  *
  51  * @return
  52  *   0 on success, negative errno value on failure.
  53  */
  54 int
  55 mlx5_dev_start(struct rte_eth_dev *dev)
  56 {
  57         struct priv *priv = dev->data->dev_private;
  58         int err;
  59
  60         if (mlx5_is_secondary())
  61                 return -E_RTE_SECONDARY;
  62
  63         priv_lock(priv);
  64         if (priv->started) {
  65                 priv_unlock(priv);
  66                 return 0;
  67         }
  68         /* Update Rx/Tx callback. */
  69         priv_dev_select_tx_function(priv, dev);
  70         priv_dev_select_rx_function(priv, dev);
  71         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
  72         err = priv_create_hash_rxqs(priv);
  73         if (!err)
  74                 err = priv_rehash_flows(priv);
  75         if (!err)
  76                 priv->started = 1;
  77         else {
  78                 ERROR("%p: an error occurred while configuring hash RX queues:"
  79                       " %s",
  80                       (void *)priv, strerror(err));
  81                 goto error;
  82         }
  83         if (dev->data->dev_conf.fdir_conf.mode != RTE_FDIR_MODE_NONE)
  84                 priv_fdir_enable(priv);
  85         err = priv_flow_start(priv);
  86         if (err) {
  87                 priv->started = 0;
  88                 ERROR("%p: an error occurred while configuring flows:"
  89                       " %s",
  90                       (void *)priv, strerror(err));
  91                 goto error;
  92         }
  93         err = priv_rx_intr_vec_enable(priv);
  94         if (err) {
  95                 ERROR("%p: RX interrupt vector creation failed",
  96                       (void *)priv);
  97                 goto error;
  98         }
  99         priv_dev_interrupt_handler_install(priv, dev);
 100         priv_xstats_init(priv);
 101         priv_unlock(priv);
 102         return 0;
 103 error:
 104         /* Rollback. */
 105         priv_special_flow_disable_all(priv);
 106         priv_mac_addrs_disable(priv);
 107         priv_destroy_hash_rxqs(priv);
 108         priv_flow_stop(priv);
 109         priv_unlock(priv);
 110         return -err;
 111 }
 112
 113 /**
 114  * DPDK callback to stop the device.
 115  *
 116  * Simulate device stop by detaching all configured flows.
 117  *
 118  * @param dev
 119  *   Pointer to Ethernet device structure.
 120  */
 121 void
 122 mlx5_dev_stop(struct rte_eth_dev *dev)
 123 {
 124         struct priv *priv = dev->data->dev_private;
 125
 126         if (mlx5_is_secondary())
 127                 return;
 128
 129         priv_lock(priv);
 130         if (!priv->started) {
 131                 priv_unlock(priv);
 132                 return;
 133         }
 134         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 135         priv_special_flow_disable_all(priv);
 136         priv_mac_addrs_disable(priv);
 137         priv_destroy_hash_rxqs(priv);
 138         priv_fdir_disable(priv);
 139         priv_flow_stop(priv);
 140         priv_rx_intr_vec_disable(priv);
 141         priv_dev_interrupt_handler_uninstall(priv, dev);
 142         priv->started = 0;
 143         priv_unlock(priv);
 144 }