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 /* DPDK headers don't like -pedantic. */
  35 #ifdef PEDANTIC
  36 #pragma GCC diagnostic ignored "-Wpedantic"
  37 #endif
  38 #include <rte_ether.h>
  39 #include <rte_ethdev.h>
  40 #include <rte_interrupts.h>
  41 #include <rte_alarm.h>
  42 #ifdef PEDANTIC
  43 #pragma GCC diagnostic error "-Wpedantic"
  44 #endif
  45
  46 #include "mlx5.h"
  47 #include "mlx5_rxtx.h"
  48 #include "mlx5_utils.h"
  49
  50 /**
  51  * DPDK callback to start the device.
  52  *
  53  * Simulate device start by attaching all configured flows.
  54  *
  55  * @param dev
  56  *   Pointer to Ethernet device structure.
  57  *
  58  * @return
  59  *   0 on success, negative errno value on failure.
  60  */
  61 int
  62 mlx5_dev_start(struct rte_eth_dev *dev)
  63 {
  64         struct priv *priv = dev->data->dev_private;
  65         int err;
  66
  67         if (mlx5_is_secondary())
  68                 return -E_RTE_SECONDARY;
  69
  70         priv_lock(priv);
  71         if (priv->started) {
  72                 priv_unlock(priv);
  73                 return 0;
  74         }
  75         /* Update Rx/Tx callback. */
  76         priv_select_tx_function(priv);
  77         priv_select_rx_function(priv);
  78         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
  79         err = priv_create_hash_rxqs(priv);
  80         if (!err)
  81                 err = priv_rehash_flows(priv);
  82         if (!err)
  83                 priv->started = 1;
  84         else {
  85                 ERROR("%p: an error occurred while configuring hash RX queues:"
  86                       " %s",
  87                       (void *)priv, strerror(err));
  88                 goto error;
  89         }
  90         if (dev->data->dev_conf.fdir_conf.mode != RTE_FDIR_MODE_NONE)
  91                 priv_fdir_enable(priv);
  92         err = priv_flow_start(priv);
  93         if (err) {
  94                 priv->started = 0;
  95                 ERROR("%p: an error occurred while configuring flows:"
  96                       " %s",
  97                       (void *)priv, strerror(err));
  98                 goto error;
  99         }
 100         err = priv_rx_intr_vec_enable(priv);
 101         if (err) {
 102                 ERROR("%p: RX interrupt vector creation failed",
 103                       (void *)priv);
 104                 goto error;
 105         }
 106         priv_dev_interrupt_handler_install(priv, dev);
 107         priv_xstats_init(priv);
 108         priv_unlock(priv);
 109         return 0;
 110 error:
 111         /* Rollback. */
 112         priv_special_flow_disable_all(priv);
 113         priv_mac_addrs_disable(priv);
 114         priv_destroy_hash_rxqs(priv);
 115         priv_flow_stop(priv);
 116         priv_unlock(priv);
 117         return -err;
 118 }
 119
 120 /**
 121  * DPDK callback to stop the device.
 122  *
 123  * Simulate device stop by detaching all configured flows.
 124  *
 125  * @param dev
 126  *   Pointer to Ethernet device structure.
 127  */
 128 void
 129 mlx5_dev_stop(struct rte_eth_dev *dev)
 130 {
 131         struct priv *priv = dev->data->dev_private;
 132
 133         if (mlx5_is_secondary())
 134                 return;
 135
 136         priv_lock(priv);
 137         if (!priv->started) {
 138                 priv_unlock(priv);
 139                 return;
 140         }
 141         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 142         priv_special_flow_disable_all(priv);
 143         priv_mac_addrs_disable(priv);
 144         priv_destroy_hash_rxqs(priv);
 145         priv_fdir_disable(priv);
 146         priv_flow_stop(priv);
 147         priv_rx_intr_vec_disable(priv);
 148         priv_dev_interrupt_handler_uninstall(priv, dev);
 149         priv->started = 0;
 150         priv_unlock(priv);
 151 }