net/mlx5: remove redundant started flag
[dpdk.git] / 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         /* Update Rx/Tx callback. */
65         priv_dev_select_tx_function(priv, dev);
66         priv_dev_select_rx_function(priv, dev);
67         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
68         err = priv_create_hash_rxqs(priv);
69         if (!err)
70                 err = priv_rehash_flows(priv);
71         else {
72                 ERROR("%p: an error occurred while configuring hash RX queues:"
73                       " %s",
74                       (void *)priv, strerror(err));
75                 goto error;
76         }
77         err = priv_flow_start(priv);
78         if (err) {
79                 ERROR("%p: an error occurred while configuring flows:"
80                       " %s",
81                       (void *)priv, strerror(err));
82                 goto error;
83         }
84         err = priv_rx_intr_vec_enable(priv);
85         if (err) {
86                 ERROR("%p: RX interrupt vector creation failed",
87                       (void *)priv);
88                 goto error;
89         }
90         priv_dev_interrupt_handler_install(priv, dev);
91         priv_xstats_init(priv);
92         priv_unlock(priv);
93         return 0;
94 error:
95         /* Rollback. */
96         priv_special_flow_disable_all(priv);
97         priv_mac_addrs_disable(priv);
98         priv_destroy_hash_rxqs(priv);
99         priv_flow_stop(priv);
100         priv_unlock(priv);
101         return -err;
102 }
103
104 /**
105  * DPDK callback to stop the device.
106  *
107  * Simulate device stop by detaching all configured flows.
108  *
109  * @param dev
110  *   Pointer to Ethernet device structure.
111  */
112 void
113 mlx5_dev_stop(struct rte_eth_dev *dev)
114 {
115         struct priv *priv = dev->data->dev_private;
116
117         if (mlx5_is_secondary())
118                 return;
119
120         priv_lock(priv);
121         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
122         priv_special_flow_disable_all(priv);
123         priv_mac_addrs_disable(priv);
124         priv_destroy_hash_rxqs(priv);
125         priv_flow_stop(priv);
126         priv_rx_intr_vec_disable(priv);
127         priv_dev_interrupt_handler_uninstall(priv, dev);
128         priv_unlock(priv);
129 }