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can: etas_es58x: add devlink support

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Add basic support for devlink at the device level. The callbacks of
struct devlink_ops will be implemented next.

Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20221130174658.29282-2-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Vincent Mailhol 2022-12-01 02:46:52 +09:00 committed by Marc Kleine-Budde
parent 74d95352bd
commit 2c4a1efcf6
5 changed files with 31 additions and 4 deletions
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1
drivers/net/can/usb/Kconfig
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@ -30,6 +30,7 @@ config CAN_ESD_USB
config CAN_ETAS_ES58X
tristate "ETAS ES58X CAN/USB interfaces"
select CRC16
select NET_DEVLINK
help
This driver supports the ES581.4, ES582.1 and ES584.1 interfaces
from ETAS GmbH (https://www.etas.com/en/products/es58x.php).

2
drivers/net/can/usb/etas_es58x/Makefile
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@ -1,3 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_CAN_ETAS_ES58X) += etas_es58x.o
etas_es58x-y = es58x_core.o es581_4.o es58x_fd.o
etas_es58x-y = es58x_core.o es58x_devlink.o es581_4.o es58x_fd.o

13
drivers/net/can/usb/etas_es58x/es58x_core.c
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@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <net/devlink.h>
#include "es58x_core.h"
@ -2177,6 +2178,7 @@ static struct es58x_device *es58x_init_es58x_dev(struct usb_interface *intf,
{
struct device *dev = &intf->dev;
struct es58x_device *es58x_dev;
struct devlink *devlink;
const struct es58x_parameters *param;
const struct es58x_operators *ops;
struct usb_device *udev = interface_to_usbdev(intf);
@ -2199,11 +2201,12 @@ static struct es58x_device *es58x_init_es58x_dev(struct usb_interface *intf,
ops = &es581_4_ops;
}
es58x_dev = devm_kzalloc(dev, es58x_sizeof_es58x_device(param),
GFP_KERNEL);
if (!es58x_dev)
devlink = devlink_alloc(&es58x_dl_ops, es58x_sizeof_es58x_device(param),
dev);
if (!devlink)
return ERR_PTR(-ENOMEM);
es58x_dev = devlink_priv(devlink);
es58x_dev->param = param;
es58x_dev->ops = ops;
es58x_dev->dev = dev;
@ -2250,6 +2253,8 @@ static int es58x_probe(struct usb_interface *intf,
if (ret)
return ret;
devlink_register(priv_to_devlink(es58x_dev));
for (ch_idx = 0; ch_idx < es58x_dev->num_can_ch; ch_idx++) {
ret = es58x_init_netdev(es58x_dev, ch_idx);
if (ret) {
@ -2275,8 +2280,10 @@ static void es58x_disconnect(struct usb_interface *intf)
dev_info(&intf->dev, "Disconnecting %s %s\n",
es58x_dev->udev->manufacturer, es58x_dev->udev->product);
devlink_unregister(priv_to_devlink(es58x_dev));
es58x_free_netdevs(es58x_dev);
es58x_free_urbs(es58x_dev);
devlink_free(priv_to_devlink(es58x_dev));
usb_set_intfdata(intf, NULL);
}

6
drivers/net/can/usb/etas_es58x/es58x_core.h
View File

@ -674,6 +674,7 @@ static inline enum es58x_flag es58x_get_flags(const struct sk_buff *skb)
return es58x_flags;
}
/* es58x_core.c. */
int es58x_can_get_echo_skb(struct net_device *netdev, u32 packet_idx,
u64 *tstamps, unsigned int pkts);
int es58x_tx_ack_msg(struct net_device *netdev, u16 tx_free_entries,
@ -691,9 +692,14 @@ int es58x_rx_cmd_ret_u32(struct net_device *netdev,
int es58x_send_msg(struct es58x_device *es58x_dev, u8 cmd_type, u8 cmd_id,
const void *msg, u16 cmd_len, int channel_idx);
/* es58x_devlink.c. */
extern const struct devlink_ops es58x_dl_ops;
/* es581_4.c. */
extern const struct es58x_parameters es581_4_param;
extern const struct es58x_operators es581_4_ops;
/* es58x_fd.c. */
extern const struct es58x_parameters es58x_fd_param;
extern const struct es58x_operators es58x_fd_ops;

13
drivers/net/can/usb/etas_es58x/es58x_devlink.c Normal file
View File

@ -0,0 +1,13 @@
// SPDX-License-Identifier: GPL-2.0
/* Driver for ETAS GmbH ES58X USB CAN(-FD) Bus Interfaces.
*
* File es58x_devlink.c: report the product information using devlink.
*
* Copyright (c) 2022 Vincent Mailhol <mailhol.vincent@wanadoo.fr>
*/
#include <net/devlink.h>
const struct devlink_ops es58x_dl_ops = {
};