tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
net: iosm: uevent support
Report modem status via uevent.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
authored by
M Chetan Kumar
and committed by
David S. Miller
110e6e02
64516f63
+85
+44
drivers/net/wwan/iosm/iosm_ipc_uevent.c
+44
drivers/net/wwan/iosm/iosm_ipc_uevent.c
···
1
+
// SPDX-License-Identifier: GPL-2.0-only
2
+
/*
3
+
* Copyright (C) 2020-21 Intel Corporation.
4
+
*/
5
+
6
+
#include <linux/device.h>
7
+
#include <linux/kobject.h>
8
+
#include <linux/slab.h>
9
+
10
+
#include "iosm_ipc_uevent.h"
11
+
12
+
/* Update the uevent in work queue context */
13
+
static void ipc_uevent_work(struct work_struct *data)
14
+
{
15
+
struct ipc_uevent_info *info;
16
+
char *envp[2] = { NULL, NULL };
17
+
18
+
info = container_of(data, struct ipc_uevent_info, work);
19
+
20
+
envp[0] = info->uevent;
21
+
22
+
if (kobject_uevent_env(&info->dev->kobj, KOBJ_CHANGE, envp))
23
+
pr_err("uevent %s failed to sent", info->uevent);
24
+
25
+
kfree(info);
26
+
}
27
+
28
+
void ipc_uevent_send(struct device *dev, char *uevent)
29
+
{
30
+
struct ipc_uevent_info *info = kzalloc(sizeof(*info), GFP_ATOMIC);
31
+
32
+
if (!info)
33
+
return;
34
+
35
+
/* Initialize the kernel work queue */
36
+
INIT_WORK(&info->work, ipc_uevent_work);
37
+
38
+
/* Store the device and event information */
39
+
info->dev = dev;
40
+
snprintf(info->uevent, MAX_UEVENT_LEN, "%s: %s", dev_name(dev), uevent);
41
+
42
+
/* Schedule uevent in process context using work queue */
43
+
schedule_work(&info->work);
44
+
}
+41
drivers/net/wwan/iosm/iosm_ipc_uevent.h
+41
drivers/net/wwan/iosm/iosm_ipc_uevent.h
···
1
+
/* SPDX-License-Identifier: GPL-2.0-only
2
+
*
3
+
* Copyright (C) 2020-21 Intel Corporation.
4
+
*/
5
+
6
+
#ifndef IOSM_IPC_UEVENT_H
7
+
#define IOSM_IPC_UEVENT_H
8
+
9
+
/* Baseband event strings */
10
+
#define UEVENT_MDM_NOT_READY "MDM_NOT_READY"
11
+
#define UEVENT_ROM_READY "ROM_READY"
12
+
#define UEVENT_MDM_READY "MDM_READY"
13
+
#define UEVENT_CRASH "CRASH"
14
+
#define UEVENT_CD_READY "CD_READY"
15
+
#define UEVENT_CD_READY_LINK_DOWN "CD_READY_LINK_DOWN"
16
+
#define UEVENT_MDM_TIMEOUT "MDM_TIMEOUT"
17
+
18
+
/* Maximum length of user events */
19
+
#define MAX_UEVENT_LEN 64
20
+
21
+
/**
22
+
* struct ipc_uevent_info - Uevent information structure.
23
+
* @dev: Pointer to device structure
24
+
* @uevent: Uevent information
25
+
* @work: Uevent work struct
26
+
*/
27
+
struct ipc_uevent_info {
28
+
struct device *dev;
29
+
char uevent[MAX_UEVENT_LEN];
30
+
struct work_struct work;
31
+
};
32
+
33
+
/**
34
+
* ipc_uevent_send - Send modem event to user space.
35
+
* @dev: Generic device pointer
36
+
* @uevent: Uevent information
37
+
*
38
+
*/
39
+
void ipc_uevent_send(struct device *dev, char *uevent);
40
+
41
+
#endif