From patchwork Tue Jun 8 17:04:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kumar, M Chetan" X-Patchwork-Id: 457329 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2FCE3C47082 for ; Tue, 8 Jun 2021 17:06:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1AD4461285 for ; Tue, 8 Jun 2021 17:06:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233874AbhFHRIW (ORCPT ); Tue, 8 Jun 2021 13:08:22 -0400 Received: from mga09.intel.com ([134.134.136.24]:45943 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233914AbhFHRIK (ORCPT ); Tue, 8 Jun 2021 13:08:10 -0400 IronPort-SDR: Pb4yE6L1f4T//Xo0KIDMff6Dewfu/rx7spk36t4KzS5shfyEFGPUKFQtYbnSiGy5SQ69nefIrA NKvgpH9LFI6Q== X-IronPort-AV: E=McAfee;i="6200,9189,10009"; a="204855377" X-IronPort-AV: E=Sophos;i="5.83,258,1616482800"; d="scan'208";a="204855377" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jun 2021 10:05:53 -0700 IronPort-SDR: kL3dmvgz9Ntl1NpiwmaG5hINSVd2CQqOlqtgdTp5oK7T86PNRTwsMiZMgX4m7dtsoNQsWGB49z 54FZHOEJj6HA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,258,1616482800"; d="scan'208";a="482035582" Received: from bgsxx0031.iind.intel.com ([10.106.222.40]) by orsmga001.jf.intel.com with ESMTP; 08 Jun 2021 10:05:50 -0700 From: M Chetan Kumar To: netdev@vger.kernel.org, linux-wireless@vger.kernel.org Cc: johannes@sipsolutions.net, krishna.c.sudi@intel.com, linuxwwan@intel.com Subject: [PATCH V4 14/16] net: iosm: uevent support Date: Tue, 8 Jun 2021 22:34:47 +0530 Message-Id: <20210608170449.28031-15-m.chetan.kumar@intel.com> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20210608170449.28031-1-m.chetan.kumar@intel.com> References: <20210608170449.28031-1-m.chetan.kumar@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Report modem status via uevent. Signed-off-by: M Chetan Kumar --- v4: no change. 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 +#include +#include + +#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