[PATCH V3 14/16] net: iosm: uevent support
From: M Chetan Kumar <hidden>
Date: 2021-05-20 14:09:29
Also in:
linux-wireless
Subsystem:
intel wwan iosm driver, networking drivers, the rest, wwan drivers · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Loic Poulain, Sergey Ryazanov
Report modem status via uevent. Signed-off-by: M Chetan Kumar <redacted> --- v3: no change. v2: Removed non-related header file inclusion. --- drivers/net/wwan/iosm/iosm_ipc_uevent.c | 44 +++++++++++++++++++++++++ drivers/net/wwan/iosm/iosm_ipc_uevent.h | 41 +++++++++++++++++++++++ 2 files changed, 85 insertions(+) create mode 100644 drivers/net/wwan/iosm/iosm_ipc_uevent.c create mode 100644 drivers/net/wwan/iosm/iosm_ipc_uevent.h
diff --git a/drivers/net/wwan/iosm/iosm_ipc_uevent.c b/drivers/net/wwan/iosm/iosm_ipc_uevent.c
new file mode 100644
index 000000000000..2229d752926c
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_uevent.c@@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020-21 Intel Corporation. + */ + +#include <linux/device.h> +#include <linux/kobject.h> +#include <linux/slab.h> + +#include "iosm_ipc_uevent.h" + +/* Update the uevent in work queue context */ +static void ipc_uevent_work(struct work_struct *data) +{ + struct ipc_uevent_info *info; + char *envp[2] = { NULL, NULL }; + + info = container_of(data, struct ipc_uevent_info, work); + + envp[0] = info->uevent; + + if (kobject_uevent_env(&info->dev->kobj, KOBJ_CHANGE, envp)) + pr_err("uevent %s failed to sent", info->uevent); + + kfree(info); +} + +void ipc_uevent_send(struct device *dev, char *uevent) +{ + struct ipc_uevent_info *info = kzalloc(sizeof(*info), GFP_ATOMIC); + + if (!info) + return; + + /* Initialize the kernel work queue */ + INIT_WORK(&info->work, ipc_uevent_work); + + /* Store the device and event information */ + info->dev = dev; + snprintf(info->uevent, MAX_UEVENT_LEN, "%s: %s", dev_name(dev), uevent); + + /* Schedule uevent in process context using work queue */ + schedule_work(&info->work); +}
diff --git a/drivers/net/wwan/iosm/iosm_ipc_uevent.h b/drivers/net/wwan/iosm/iosm_ipc_uevent.h
new file mode 100644
index 000000000000..2e45c051b5f4
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_uevent.h@@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (C) 2020-21 Intel Corporation. + */ + +#ifndef IOSM_IPC_UEVENT_H +#define IOSM_IPC_UEVENT_H + +/* Baseband event strings */ +#define UEVENT_MDM_NOT_READY "MDM_NOT_READY" +#define UEVENT_ROM_READY "ROM_READY" +#define UEVENT_MDM_READY "MDM_READY" +#define UEVENT_CRASH "CRASH" +#define UEVENT_CD_READY "CD_READY" +#define UEVENT_CD_READY_LINK_DOWN "CD_READY_LINK_DOWN" +#define UEVENT_MDM_TIMEOUT "MDM_TIMEOUT" + +/* Maximum length of user events */ +#define MAX_UEVENT_LEN 64 + +/** + * struct ipc_uevent_info - Uevent information structure. + * @dev: Pointer to device structure + * @uevent: Uevent information + * @work: Uevent work struct + */ +struct ipc_uevent_info { + struct device *dev; + char uevent[MAX_UEVENT_LEN]; + struct work_struct work; +}; + +/** + * ipc_uevent_send - Send modem event to user space. + * @dev: Generic device pointer + * @uevent: Uevent information + * + */ +void ipc_uevent_send(struct device *dev, char *uevent); + +#endif
--
2.25.1