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 "-pedantic"
  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 "-pedantic"
  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         priv_lock(priv);
  68         if (priv->started) {
  69                 priv_unlock(priv);
  70                 return 0;
  71         }
  72         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
  73         err = priv_create_hash_rxqs(priv);
  74         if (!err)
  75                 err = priv_rehash_flows(priv);
  76         if (!err)
  77                 priv->started = 1;
  78         else {
  79                 ERROR("%p: an error occurred while configuring hash RX queues:"
  80                       " %s",
  81                       (void *)priv, strerror(err));
  82                 /* Rollback. */
  83                 priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_IPV6MULTI);
  84                 priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_BROADCAST);
  85                 priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_ALLMULTI);
  86                 priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_PROMISC);
  87                 priv_mac_addrs_disable(priv);
  88                 priv_destroy_hash_rxqs(priv);
  89         }
  90         priv_dev_interrupt_handler_install(priv, dev);
  91         priv_unlock(priv);
  92         return -err;
  93 }
  94
  95 /**
  96  * DPDK callback to stop the device.
  97  *
  98  * Simulate device stop by detaching all configured flows.
  99  *
 100  * @param dev
 101  *   Pointer to Ethernet device structure.
 102  */
 103 void
 104 mlx5_dev_stop(struct rte_eth_dev *dev)
 105 {
 106         struct priv *priv = dev->data->dev_private;
 107
 108         priv_lock(priv);
 109         if (!priv->started) {
 110                 priv_unlock(priv);
 111                 return;
 112         }
 113         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 114         priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_IPV6MULTI);
 115         priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_BROADCAST);
 116         priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_ALLMULTI);
 117         priv_special_flow_disable(priv, HASH_RXQ_FLOW_TYPE_PROMISC);
 118         priv_mac_addrs_disable(priv);
 119         priv_destroy_hash_rxqs(priv);
 120         priv_dev_interrupt_handler_uninstall(priv, dev);
 121         priv->started = 0;
 122         priv_unlock(priv);
 123 }