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         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
  76         err = priv_create_hash_rxqs(priv);
  77         if (!err)
  78                 err = priv_rehash_flows(priv);
  79         if (!err)
  80                 priv->started = 1;
  81         else {
  82                 ERROR("%p: an error occurred while configuring hash RX queues:"
  83                       " %s",
  84                       (void *)priv, strerror(err));
  85                 goto error;
  86         }
  87         if (dev->data->dev_conf.fdir_conf.mode != RTE_FDIR_MODE_NONE)
  88                 priv_fdir_enable(priv);
  89         err = priv_flow_start(priv);
  90         if (err) {
  91                 priv->started = 0;
  92                 ERROR("%p: an error occurred while configuring flows:"
  93                       " %s",
  94                       (void *)priv, strerror(err));
  95                 goto error;
  96         }
  97         err = priv_rx_intr_vec_enable(priv);
  98         if (err) {
  99                 ERROR("%p: RX interrupt vector creation failed",
 100                       (void *)priv);
 101                 goto error;
 102         }
 103         priv_dev_interrupt_handler_install(priv, dev);
 104         priv_xstats_init(priv);
 105         priv_unlock(priv);
 106         return 0;
 107 error:
 108         /* Rollback. */
 109         priv_special_flow_disable_all(priv);
 110         priv_mac_addrs_disable(priv);
 111         priv_destroy_hash_rxqs(priv);
 112         priv_flow_stop(priv);
 113         priv_unlock(priv);
 114         return -err;
 115 }
 116
 117 /**
 118  * DPDK callback to stop the device.
 119  *
 120  * Simulate device stop by detaching all configured flows.
 121  *
 122  * @param dev
 123  *   Pointer to Ethernet device structure.
 124  */
 125 void
 126 mlx5_dev_stop(struct rte_eth_dev *dev)
 127 {
 128         struct priv *priv = dev->data->dev_private;
 129
 130         if (mlx5_is_secondary())
 131                 return;
 132
 133         priv_lock(priv);
 134         if (!priv->started) {
 135                 priv_unlock(priv);
 136                 return;
 137         }
 138         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 139         priv_special_flow_disable_all(priv);
 140         priv_mac_addrs_disable(priv);
 141         priv_destroy_hash_rxqs(priv);
 142         priv_fdir_disable(priv);
 143         priv_flow_stop(priv);
 144         priv_rx_intr_vec_disable(priv);
 145         priv_dev_interrupt_handler_uninstall(priv, dev);
 146         priv->started = 0;
 147         priv_unlock(priv);
 148 }