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 */
61int
62mlx5_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		/* Rollback. */
86		priv_special_flow_disable_all(priv);
87		priv_mac_addrs_disable(priv);
88		priv_destroy_hash_rxqs(priv);
89	}
90	if (dev->data->dev_conf.fdir_conf.mode != RTE_FDIR_MODE_NONE)
91		priv_fdir_enable(priv);
92	priv_dev_interrupt_handler_install(priv, dev);
93	priv_unlock(priv);
94	return -err;
95}
96
97/**
98 * DPDK callback to stop the device.
99 *
100 * Simulate device stop by detaching all configured flows.
101 *
102 * @param dev
103 *   Pointer to Ethernet device structure.
104 */
105void
106mlx5_dev_stop(struct rte_eth_dev *dev)
107{
108	struct priv *priv = dev->data->dev_private;
109
110	if (mlx5_is_secondary())
111		return;
112
113	priv_lock(priv);
114	if (!priv->started) {
115		priv_unlock(priv);
116		return;
117	}
118	DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
119	priv_special_flow_disable_all(priv);
120	priv_mac_addrs_disable(priv);
121	priv_destroy_hash_rxqs(priv);
122	priv_fdir_disable(priv);
123	priv_dev_interrupt_handler_uninstall(priv, dev);
124	priv->started = 0;
125	priv_unlock(priv);
126}
127