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
|
// SPDX-License-Identifier: GPL-2.0
//
// mcp251xfd - Microchip MCP251xFD Family CAN controller driver
//
// Copyright (c) 2021, 2022 Pengutronix,
// Marc Kleine-Budde <kernel@pengutronix.de>
//
#include <linux/ethtool.h>
#include "mcp251xfd.h"
#include "mcp251xfd-ram.h"
static void
mcp251xfd_ring_get_ringparam(struct net_device *ndev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
const struct mcp251xfd_priv *priv = netdev_priv(ndev);
const bool fd_mode = mcp251xfd_is_fd_mode(priv);
struct can_ram_layout layout;
can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, fd_mode);
ring->rx_max_pending = layout.max_rx;
ring->tx_max_pending = layout.max_tx;
ring->rx_pending = priv->rx_obj_num;
ring->tx_pending = priv->tx->obj_num;
}
static int
mcp251xfd_ring_set_ringparam(struct net_device *ndev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
struct mcp251xfd_priv *priv = netdev_priv(ndev);
const bool fd_mode = mcp251xfd_is_fd_mode(priv);
struct can_ram_layout layout;
can_ram_get_layout(&layout, &mcp251xfd_ram_config, ring, NULL, fd_mode);
if ((layout.cur_rx != priv->rx_obj_num ||
layout.cur_tx != priv->tx->obj_num) &&
netif_running(ndev))
return -EBUSY;
priv->rx_obj_num = layout.cur_rx;
priv->rx_obj_num_coalesce_irq = layout.rx_coalesce;
priv->tx->obj_num = layout.cur_tx;
priv->tx_obj_num_coalesce_irq = layout.tx_coalesce;
return 0;
}
static int mcp251xfd_ring_get_coalesce(struct net_device *ndev,
struct ethtool_coalesce *ec,
struct kernel_ethtool_coalesce *kec,
struct netlink_ext_ack *ext_ack)
{
struct mcp251xfd_priv *priv = netdev_priv(ndev);
u32 rx_max_frames, tx_max_frames;
/* The ethtool doc says:
* To disable coalescing, set usecs = 0 and max_frames = 1.
*/
if (priv->rx_obj_num_coalesce_irq == 0)
rx_max_frames = 1;
else
rx_max_frames = priv->rx_obj_num_coalesce_irq;
ec->rx_max_coalesced_frames_irq = rx_max_frames;
ec->rx_coalesce_usecs_irq = priv->rx_coalesce_usecs_irq;
if (priv->tx_obj_num_coalesce_irq == 0)
tx_max_frames = 1;
else
tx_max_frames = priv->tx_obj_num_coalesce_irq;
ec->tx_max_coalesced_frames_irq = tx_max_frames;
ec->tx_coalesce_usecs_irq = priv->tx_coalesce_usecs_irq;
return 0;
}
static int mcp251xfd_ring_set_coalesce(struct net_device *ndev,
struct ethtool_coalesce *ec,
struct kernel_ethtool_coalesce *kec,
struct netlink_ext_ack *ext_ack)
{
struct mcp251xfd_priv *priv = netdev_priv(ndev);
const bool fd_mode = mcp251xfd_is_fd_mode(priv);
const struct ethtool_ringparam ring = {
.rx_pending = priv->rx_obj_num,
.tx_pending = priv->tx->obj_num,
};
struct can_ram_layout layout;
can_ram_get_layout(&layout, &mcp251xfd_ram_config, &ring, ec, fd_mode);
if ((layout.rx_coalesce != priv->rx_obj_num_coalesce_irq ||
ec->rx_coalesce_usecs_irq != priv->rx_coalesce_usecs_irq ||
layout.tx_coalesce != priv->tx_obj_num_coalesce_irq ||
ec->tx_coalesce_usecs_irq != priv->tx_coalesce_usecs_irq) &&
netif_running(ndev))
return -EBUSY;
priv->rx_obj_num = layout.cur_rx;
priv->rx_obj_num_coalesce_irq = layout.rx_coalesce;
priv->rx_coalesce_usecs_irq = ec->rx_coalesce_usecs_irq;
priv->tx->obj_num = layout.cur_tx;
priv->tx_obj_num_coalesce_irq = layout.tx_coalesce;
priv->tx_coalesce_usecs_irq = ec->tx_coalesce_usecs_irq;
return 0;
}
static const struct ethtool_ops mcp251xfd_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS_IRQ |
ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ |
ETHTOOL_COALESCE_TX_USECS_IRQ |
ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ,
.get_ringparam = mcp251xfd_ring_get_ringparam,
.set_ringparam = mcp251xfd_ring_set_ringparam,
.get_coalesce = mcp251xfd_ring_get_coalesce,
.set_coalesce = mcp251xfd_ring_set_coalesce,
.get_ts_info = can_ethtool_op_get_ts_info_hwts,
};
void mcp251xfd_ethtool_init(struct mcp251xfd_priv *priv)
{
struct can_ram_layout layout;
priv->ndev->ethtool_ops = &mcp251xfd_ethtool_ops;
can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, false);
priv->rx_obj_num = layout.default_rx;
priv->tx->obj_num = layout.default_tx;
priv->rx_obj_num_coalesce_irq = 0;
priv->tx_obj_num_coalesce_irq = 0;
priv->rx_coalesce_usecs_irq = 0;
priv->tx_coalesce_usecs_irq = 0;
}
|
