summaryrefslogtreecommitdiff
path: root/drivers/net/mlx5/mlx5_vlan.c
blob: c91d08be1a4b0951544f53541385e0b049f6bdeb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2015 6WIND S.A.
 * Copyright 2015 Mellanox Technologies, Ltd
 */

#include <stddef.h>
#include <errno.h>
#include <assert.h>
#include <stdint.h>

/*
 * Not needed by this file; included to work around the lack of off_t
 * definition for mlx5dv.h with unpatched rdma-core versions.
 */
#include <sys/types.h>

/* Verbs headers do not support -pedantic. */
#ifdef PEDANTIC
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
#include <infiniband/mlx5dv.h>
#include <infiniband/verbs.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-Wpedantic"
#endif

#include <rte_ethdev_driver.h>
#include <rte_common.h>

#include "mlx5_utils.h"
#include "mlx5.h"
#include "mlx5_autoconf.h"
#include "mlx5_glue.h"

/**
 * DPDK callback to configure a VLAN filter.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param vlan_id
 *   VLAN ID to filter.
 * @param on
 *   Toggle filter.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
{
	struct priv *priv = dev->data->dev_private;
	unsigned int i;

	DRV_LOG(DEBUG, "port %u %s VLAN filter ID %" PRIu16,
		dev->data->port_id, (on ? "enable" : "disable"), vlan_id);
	assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter));
	for (i = 0; (i != priv->vlan_filter_n); ++i)
		if (priv->vlan_filter[i] == vlan_id)
			break;
	/* Check if there's room for another VLAN filter. */
	if (i == RTE_DIM(priv->vlan_filter)) {
		rte_errno = ENOMEM;
		return -rte_errno;
	}
	if (i < priv->vlan_filter_n) {
		assert(priv->vlan_filter_n != 0);
		/* Enabling an existing VLAN filter has no effect. */
		if (on)
			goto out;
		/* Remove VLAN filter from list. */
		--priv->vlan_filter_n;
		memmove(&priv->vlan_filter[i],
			&priv->vlan_filter[i + 1],
			sizeof(priv->vlan_filter[i]) *
			(priv->vlan_filter_n - i));
		priv->vlan_filter[priv->vlan_filter_n] = 0;
	} else {
		assert(i == priv->vlan_filter_n);
		/* Disabling an unknown VLAN filter has no effect. */
		if (!on)
			goto out;
		/* Add new VLAN filter. */
		priv->vlan_filter[priv->vlan_filter_n] = vlan_id;
		++priv->vlan_filter_n;
	}
out:
	if (dev->data->dev_started)
		return mlx5_traffic_restart(dev);
	return 0;
}

/**
 * Callback to set/reset VLAN stripping for a specific queue.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param queue
 *   RX queue index.
 * @param on
 *   Enable/disable VLAN stripping.
 */
void
mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on)
{
	struct priv *priv = dev->data->dev_private;
	struct mlx5_rxq_data *rxq = (*priv->rxqs)[queue];
	struct mlx5_rxq_ctrl *rxq_ctrl =
		container_of(rxq, struct mlx5_rxq_ctrl, rxq);
	struct ibv_wq_attr mod;
	uint16_t vlan_offloads =
		(on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
		0;
	int ret;

	/* Validate hw support */
	if (!priv->config.hw_vlan_strip) {
		DRV_LOG(ERR, "port %u VLAN stripping is not supported",
			dev->data->port_id);
		return;
	}
	/* Validate queue number */
	if (queue >= priv->rxqs_n) {
		DRV_LOG(ERR, "port %u VLAN stripping, invalid queue number %d",
			dev->data->port_id, queue);
		return;
	}
	DRV_LOG(DEBUG, "port %u set VLAN offloads 0x%x for port %uqueue %d",
		dev->data->port_id, vlan_offloads, rxq->port_id, queue);
	if (!rxq_ctrl->ibv) {
		/* Update related bits in RX queue. */
		rxq->vlan_strip = !!on;
		return;
	}
	mod = (struct ibv_wq_attr){
		.attr_mask = IBV_WQ_ATTR_FLAGS,
		.flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
		.flags = vlan_offloads,
	};
	ret = mlx5_glue->modify_wq(rxq_ctrl->ibv->wq, &mod);
	if (ret) {
		DRV_LOG(ERR, "port %u failed to modified stripping mode: %s",
			dev->data->port_id, strerror(rte_errno));
		return;
	}
	/* Update related bits in RX queue. */
	rxq->vlan_strip = !!on;
}

/**
 * Callback to set/reset VLAN offloads for a port.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param mask
 *   VLAN offload bit mask.
 *
 * @return
 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
{
	struct priv *priv = dev->data->dev_private;
	unsigned int i;

	if (mask & ETH_VLAN_STRIP_MASK) {
		int hw_vlan_strip = !!(dev->data->dev_conf.rxmode.offloads &
				       DEV_RX_OFFLOAD_VLAN_STRIP);

		if (!priv->config.hw_vlan_strip) {
			DRV_LOG(ERR, "port %u VLAN stripping is not supported",
				dev->data->port_id);
			return 0;
		}
		/* Run on every RX queue and set/reset VLAN stripping. */
		for (i = 0; (i != priv->rxqs_n); i++)
			mlx5_vlan_strip_queue_set(dev, i, hw_vlan_strip);
	}
	return 0;
}