From patchwork Mon Nov 23 13:51:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kumar, M Chetan" X-Patchwork-Id: 331003 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=unavailable 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 862A8C64E7D for ; Mon, 23 Nov 2020 13:53:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 417B620781 for ; Mon, 23 Nov 2020 13:53:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388477AbgKWNwb (ORCPT ); Mon, 23 Nov 2020 08:52:31 -0500 Received: from mga14.intel.com ([192.55.52.115]:1467 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730688AbgKWNw1 (ORCPT ); Mon, 23 Nov 2020 08:52:27 -0500 IronPort-SDR: CgZQdvrhyYI3FwslPUu0OBBwXfIqP7jbm93zN9jNfTfnoUkwfhP7b7hwyDmWjcBk9ofw7EMD/U RcgMMPkMe57Q== X-IronPort-AV: E=McAfee;i="6000,8403,9813"; a="170981493" X-IronPort-AV: E=Sophos;i="5.78,363,1599548400"; d="scan'208";a="170981493" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Nov 2020 05:52:26 -0800 IronPort-SDR: UjG97oxeJVliqVIQJY72E2Py01Bao0P89y9E1Oo+k5hu5eHIeCzxSftGDtM89JfrbamQnFejFn p556esfrDehw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.78,363,1599548400"; d="scan'208";a="370035606" Received: from bgsxx0031.iind.intel.com ([10.106.222.40]) by orsmga007.jf.intel.com with ESMTP; 23 Nov 2020 05:52:24 -0800 From: M Chetan Kumar To: netdev@vger.kernel.org, linux-wireless@vger.kernel.org Cc: johannes@sipsolutions.net, krishna.c.sudi@intel.com, m.chetan.kumar@intel.com Subject: [RFC 12/18] net: iosm: power management Date: Mon, 23 Nov 2020 19:21:17 +0530 Message-Id: <20201123135123.48892-13-m.chetan.kumar@intel.com> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20201123135123.48892-1-m.chetan.kumar@intel.com> References: <20201123135123.48892-1-m.chetan.kumar@intel.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Implements state machine to handle host & device sleep. Signed-off-by: M Chetan Kumar --- drivers/net/wwan/iosm/iosm_ipc_pm.c | 334 ++++++++++++++++++++++++++++++++++++ drivers/net/wwan/iosm/iosm_ipc_pm.h | 216 +++++++++++++++++++++++ 2 files changed, 550 insertions(+) create mode 100644 drivers/net/wwan/iosm/iosm_ipc_pm.c create mode 100644 drivers/net/wwan/iosm/iosm_ipc_pm.h diff --git a/drivers/net/wwan/iosm/iosm_ipc_pm.c b/drivers/net/wwan/iosm/iosm_ipc_pm.c new file mode 100644 index 000000000000..662f8f309ec0 --- /dev/null +++ b/drivers/net/wwan/iosm/iosm_ipc_pm.c @@ -0,0 +1,334 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020 Intel Corporation. + */ + +#include "iosm_ipc_protocol.h" +#include "iosm_ipc_task_queue.h" + +/* Timeout value in MS for the PM to wait for device to reach active state */ +#define IPC_PM_ACTIVE_TIMEOUT_MS (500) + +/* Value definitions for union ipc_pm_cond members. + * + * Note that here "active" has the value 1, as compared to the enums + * ipc_mem_host_pm_state or ipc_mem_dev_pm_state, where "active" is 0 + */ +#define IPC_PM_SLEEP (0) +#define IPC_PM_ACTIVE (1) + +/* Trigger the doorbell interrupt on cp to change the PM sleep/active status */ +#define ipc_cp_irq_sleep_control(ipc_pcie, data) \ + ipc_doorbell_fire(ipc_pcie, IPC_DOORBELL_IRQ_SLEEP, data) + +/* Trigger the doorbell interrupt on CP to do hpda update */ +#define ipc_cp_irq_hpda_update(ipc_pcie, data) \ + ipc_doorbell_fire(ipc_pcie, IPC_DOORBELL_IRQ_HPDA, 0xFF & (data)) + +void ipc_pm_signal_hpda_doorbell(struct iosm_pm *ipc_pm, u32 identifier, + bool host_slp_check) +{ + if (host_slp_check && ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE && + ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE_WAIT) { + ipc_pm->pending_hpda_update = true; + dev_dbg(ipc_pm->dev, + "Pending HPDA update set. Host PM_State: %d identifier:%d", + ipc_pm->host_pm_state, identifier); + return; + } + + if (!ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_IRQ, true)) { + ipc_pm->pending_hpda_update = true; + dev_dbg(ipc_pm->dev, "Pending HPDA update set. identifier:%d", + identifier); + return; + } + ipc_pm->pending_hpda_update = false; + + /* Trigger the irq towards CP */ + ipc_cp_irq_hpda_update(ipc_pm->pcie, identifier); + + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_IRQ, false); +} + +/* Wake up the device if it is in low power mode. */ +static bool ipc_pm_link_activate(struct iosm_pm *ipc_pm) +{ + if (ipc_pm->cp_state == IPC_MEM_DEV_PM_ACTIVE) + return true; + + if (ipc_pm->cp_state == IPC_MEM_DEV_PM_SLEEP) { + if (ipc_pm->ap_state == IPC_MEM_DEV_PM_SLEEP) { + /* Wake up the device. */ + ipc_cp_irq_sleep_control(ipc_pm->pcie, + IPC_MEM_DEV_PM_WAKEUP); + ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE_WAIT; + + return false; + } + + if (ipc_pm->ap_state == IPC_MEM_DEV_PM_ACTIVE_WAIT) + return false; + + return true; + } + + /* link is not ready */ + return false; +} + +void ipc_pm_host_slp_reinit_dev_active_completion(struct iosm_pm *ipc_pm) +{ + if (!ipc_pm) + return; + + atomic_set(&ipc_pm->host_sleep_pend, 1); + + reinit_completion(&ipc_pm->host_sleep_complete); +} + +bool ipc_pm_wait_for_device_active(struct iosm_pm *ipc_pm) +{ + bool ret_val = false; + + if (ipc_pm->ap_state != IPC_MEM_DEV_PM_ACTIVE) + + /* Wait for IPC_PM_ACTIVE_TIMEOUT_MS for Device sleep state + * machine to enter ACTIVE state. + */ + if (!WAIT_FOR_TIMEOUT(&ipc_pm->host_sleep_complete, + IPC_PM_ACTIVE_TIMEOUT_MS)) { + dev_err(ipc_pm->dev, + "PM timeout. Expected State:%d. Actual: %d", + IPC_MEM_DEV_PM_ACTIVE, ipc_pm->ap_state); + goto active_timeout; + } + + ret_val = true; +active_timeout: + /* Reset the atomic variable in any case as device sleep + * state machine change is no longer of interest. + */ + atomic_set(&ipc_pm->host_sleep_pend, 0); + + return ret_val; +} + +static void ipc_pm_on_link_sleep(struct iosm_pm *ipc_pm) +{ + /* pending sleep ack and all conditions are cleared + * -> signal SLEEP__ACK to CP + */ + ipc_pm->cp_state = IPC_MEM_DEV_PM_SLEEP; + ipc_pm->ap_state = IPC_MEM_DEV_PM_SLEEP; + + ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_SLEEP); +} + +static void ipc_pm_on_link_wake(struct iosm_pm *ipc_pm, bool ack) +{ + ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE; + + if (ack) { + ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE; + + ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_ACTIVE); + + /* check the consume state !!! */ + if (atomic_cmpxchg(&ipc_pm->host_sleep_pend, 1, 0)) + complete(&ipc_pm->host_sleep_complete); + } + + /* Check for pending HPDA update. + * Pending HP update could be because of sending message was + * put on hold due to Device sleep state or due to TD update + * which could be because of Device Sleep and Host Sleep + * states. + */ + if (ipc_pm->pending_hpda_update && + ipc_pm->host_pm_state == IPC_MEM_HOST_PM_ACTIVE) + ipc_pm_signal_hpda_doorbell(ipc_pm, IPC_HP_PM_TRIGGER, true); +} + +bool ipc_pm_trigger(struct iosm_pm *ipc_pm, enum ipc_pm_unit unit, bool active) +{ + union ipc_pm_cond old_cond; + union ipc_pm_cond new_cond; + bool link_active; + + /* Save the current D3 state. */ + new_cond = ipc_pm->pm_cond; + old_cond = ipc_pm->pm_cond; + + /* Calculate the power state only in the runtime phase. */ + switch (unit) { + case IPC_PM_UNIT_IRQ: /* CP irq */ + new_cond.irq = active; + break; + + case IPC_PM_UNIT_LINK: /* Device link state. */ + new_cond.link = active; + break; + + case IPC_PM_UNIT_HS: /* Host sleep trigger requires Link. */ + new_cond.hs = active; + break; + + default: + break; + } + + /* Something changed ? */ + if (old_cond.raw == new_cond.raw) { + /* Stay in the current PM state. */ + link_active = old_cond.link == IPC_PM_ACTIVE; + goto ret; + } + + ipc_pm->pm_cond = new_cond; + + if (new_cond.link) + ipc_pm_on_link_wake(ipc_pm, unit == IPC_PM_UNIT_LINK); + else if (unit == IPC_PM_UNIT_LINK) + ipc_pm_on_link_sleep(ipc_pm); + + if (old_cond.link == IPC_PM_SLEEP && new_cond.raw != 0) { + link_active = ipc_pm_link_activate(ipc_pm); + goto ret; + } + + link_active = old_cond.link == IPC_PM_ACTIVE; + +ret: + return link_active; +} + +bool ipc_pm_prepare_host_sleep(struct iosm_pm *ipc_pm) +{ + if (!ipc_pm) + return false; + + /* suspend not allowed if host_pm_state is not IPC_MEM_HOST_PM_ACTIVE */ + if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE) { + dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d", + ipc_pm->host_pm_state, IPC_MEM_HOST_PM_ACTIVE); + return false; + } + + ipc_pm->host_pm_state = IPC_MEM_HOST_PM_SLEEP_WAIT_D3; + + return true; +} + +bool ipc_pm_prepare_host_active(struct iosm_pm *ipc_pm) +{ + if (!ipc_pm) + return false; + + if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_SLEEP) { + dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d", + ipc_pm->host_pm_state, IPC_MEM_HOST_PM_SLEEP); + return false; + } + + /* Sending Sleep Exit message to CP. Update the state */ + ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE_WAIT; + + return true; +} + +bool ipc_pm_dev_slp_notification(struct iosm_pm *ipc_pm, u32 cp_pm_req) +{ + if (!ipc_pm) + return false; + + if (cp_pm_req == ipc_pm->device_sleep_notification) + return false; + + ipc_pm->device_sleep_notification = cp_pm_req; + + /* Evaluate the PM request. */ + switch (ipc_pm->cp_state) { + case IPC_MEM_DEV_PM_ACTIVE: + switch (cp_pm_req) { + case IPC_MEM_DEV_PM_ACTIVE: + break; + + case IPC_MEM_DEV_PM_SLEEP: + + /* Inform the PM that the device link can go down. */ + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_LINK, false); + + return true; + + default: + dev_err(ipc_pm->dev, + "loc-pm=(%d=active): confused req-pm=%d", + ipc_pm->cp_state, cp_pm_req); + break; + } + break; + + case IPC_MEM_DEV_PM_SLEEP: + switch (cp_pm_req) { + case IPC_MEM_DEV_PM_ACTIVE: + /* Inform the PM that the device link is active. */ + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_LINK, true); + break; + + case IPC_MEM_DEV_PM_SLEEP: + break; + + default: + dev_err(ipc_pm->dev, + "loc-pm=(%d=sleep): confused req-pm=%d", + ipc_pm->cp_state, cp_pm_req); + break; + } + break; + + default: + dev_err(ipc_pm->dev, "confused loc-pm=%d, req-pm=%d", + ipc_pm->cp_state, cp_pm_req); + break; + } + + return false; +} + +struct iosm_pm *ipc_pm_init(struct iosm_imem *ipc_imem) +{ + struct iosm_pm *ipc_pm = kzalloc(sizeof(*ipc_pm), GFP_KERNEL); + + if (!ipc_pm) + return NULL; + + ipc_pm->pcie = ipc_imem->pcie; + ipc_pm->dev = ipc_imem->dev; + + ipc_pm->pm_cond.irq = IPC_PM_SLEEP; + ipc_pm->pm_cond.hs = IPC_PM_SLEEP; + ipc_pm->pm_cond.link = IPC_PM_ACTIVE; + + ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE; + ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE; + ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE; + + ipc_pm->ipc_tasklet = ipc_imem->ipc_tasklet; + ipc_pm->ipc_task = ipc_imem->ipc_task; + + /* Create generic wait-for-completion handler for Host Sleep + * and device sleep coordination. + */ + init_completion(&ipc_pm->host_sleep_complete); + + atomic_set(&ipc_pm->host_sleep_pend, 0); + + return ipc_pm; +} + +void ipc_pm_deinit(struct iosm_pm *ipc_pm) +{ + complete(&ipc_pm->host_sleep_complete); + kfree(ipc_pm); +} diff --git a/drivers/net/wwan/iosm/iosm_ipc_pm.h b/drivers/net/wwan/iosm/iosm_ipc_pm.h new file mode 100644 index 000000000000..f09a90fe43df --- /dev/null +++ b/drivers/net/wwan/iosm/iosm_ipc_pm.h @@ -0,0 +1,216 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (C) 2020 Intel Corporation. + */ + +#ifndef IOSM_IPC_PM_H +#define IOSM_IPC_PM_H + +#include + +/** + * union ipc_pm_cond - Conditions for D3 and the sleep message to CP. + * @raw: raw/combined value for faster check + * @irq: IRQ towards CP + * @hs: Host Sleep + * @link: Device link state. + */ +union ipc_pm_cond { + unsigned int raw; + + struct { + unsigned int irq : 1; + unsigned int hs : 1; + unsigned int link : 1; + }; +}; + +/** + * enum ipc_mem_host_pm_state - Possible states of the SLEEP finite state + * machine. + * @IPC_MEM_HOST_PM_ACTIVE: Host is active + * @IPC_MEM_HOST_PM_ACTIVE_WAIT: Intermediate state before going to + * active + * @IPC_MEM_HOST_PM_SLEEP_WAIT_IDLE: Intermediate state to wait for idle + * before going into sleep + * @IPC_MEM_HOST_PM_SLEEP_WAIT_D3: Intermediate state to wait for D3 + * before going to sleep + * @IPC_MEM_HOST_PM_SLEEP: after this state the interface is not + * accessible host is in suspend to RAM + * @IPC_MEM_HOST_PM_SLEEP_WAIT_EXIT_SLEEP: Intermediate state before exiting + * sleep + */ +enum ipc_mem_host_pm_state { + IPC_MEM_HOST_PM_ACTIVE, + IPC_MEM_HOST_PM_ACTIVE_WAIT, + IPC_MEM_HOST_PM_SLEEP_WAIT_IDLE, + IPC_MEM_HOST_PM_SLEEP_WAIT_D3, + IPC_MEM_HOST_PM_SLEEP, + IPC_MEM_HOST_PM_SLEEP_WAIT_EXIT_SLEEP, +}; + +/** + * enum ipc_mem_dev_pm_state - Possible states of the SLEEP finite state + * machine. + * @IPC_MEM_DEV_PM_ACTIVE: IPC_MEM_DEV_PM_ACTIVE is the initial power + * management state. + * IRQ(struct + * ipc_mem_device_info.device_sleep_notification) + * and DOORBELL-IRQ-HPDA(data) values. + * @IPC_MEM_DEV_PM_SLEEP: IPC_MEM_DEV_PM_SLEEP is PM state for sleep. + * @IPC_MEM_DEV_PM_WAKEUP: DOORBELL-IRQ-DEVICE_WAKE(data). + * @IPC_MEM_DEV_PM_HOST_SLEEP: DOORBELL-IRQ-HOST_SLEEP(data). + * @IPC_MEM_DEV_PM_ACTIVE_WAIT: Local intermediate states. + * Before AP triggers DOORBELL-IRQ-SLEEP(data) + * either the intermediate device link state is + * SYNC_ACTIVE_WAIT i.e. the user is blocked until + * the link interworking was finished about IRQ and + * DOORBELL-IRQ-HPDA or the intermediate device + * link state is ACTIVE_WAIT i.e. the data transfer + * starts after the DOORBELL-IRQ-HPDA + * (IPC_MEM_DEV_PM_ACTIVE). + */ +enum ipc_mem_dev_pm_state { + IPC_MEM_DEV_PM_ACTIVE, + IPC_MEM_DEV_PM_SLEEP, + IPC_MEM_DEV_PM_WAKEUP, + IPC_MEM_DEV_PM_HOST_SLEEP, + IPC_MEM_DEV_PM_ACTIVE_WAIT, +}; + +/** + * struct iosm_pm - Power management instance data + * @pcie: Pointer to iosm_pcie structure + * @dev: Pointer to device structure + * @ipc_tasklet: Tasklet instance + * @ipc_task: Tasklet for scheduling a wakeup in task context + * @host_pm_state: PM states for host + * @host_sleep_pend: Variable to indicate Host Sleep Pending + * @host_sleep_complete: Generic wait-for-completion used in + * case of Host Sleep + * @pm_cond: Conditions for power management + * @ap_state: Current power management state, the + * initial state is IPC_MEM_DEV_PM_ACTIVE eq. 0. + * @cp_state: PM State of CP + * @device_sleep_notification: last handled device_sleep_notfication + * @pending_hpda_update: is a HPDA update pending? + */ +struct iosm_pm { + struct iosm_pcie *pcie; + struct device *dev; + struct tasklet_struct *ipc_tasklet; + struct ipc_task_queue *ipc_task; + enum ipc_mem_host_pm_state host_pm_state; + atomic_t host_sleep_pend; + struct completion host_sleep_complete; + union ipc_pm_cond pm_cond; + enum ipc_mem_dev_pm_state ap_state; + enum ipc_mem_dev_pm_state cp_state; + u32 device_sleep_notification; + u8 pending_hpda_update : 1; +}; + +/** + * enum ipc_pm_unit - Power management units. + * @IPC_PM_UNIT_IRQ: IRQ towards CP + * @IPC_PM_UNIT_HS: Host Sleep for converged protocol + * @IPC_PM_UNIT_LINK: Link state controlled by CP. + */ +enum ipc_pm_unit { + IPC_PM_UNIT_IRQ, /* IRQ towards CP */ + IPC_PM_UNIT_HS, /* Host Sleep for converged protocol */ + IPC_PM_UNIT_LINK, /* Link state controlled by CP. */ +}; + +/** + * ipc_pm_init - Allocate power management component + * @ipc_imem: Pointer to iosm_imem structure + * + * Returns: pointer to allocated PM component or NULL on failure. + */ +struct iosm_pm *ipc_pm_init(struct iosm_imem *ipc_imem); + +/** + * ipc_pm_deinit - Free power management component, invalidating its pointer. + * @ipc_pm: Pointer to pm component. + */ +void ipc_pm_deinit(struct iosm_pm *ipc_pm); + +/** + * ipc_pm_dev_slp_notification - Handle a sleep notification message from the + * device. This can be called from interrupt state + * This function handles Host Sleep requests too + * if the Host Sleep protocol is register based. + * @ipc_pm: Pointer to power management component + * @sleep_notification: Actual notification from device + * + * Returns: true if dev sleep state has to be checked, false otherwise. + */ +bool ipc_pm_dev_slp_notification(struct iosm_pm *ipc_pm, + u32 sleep_notification); + +/** + * ipc_pm_prepare_host_sleep - Prepare the PM for sleep by entering + * IPC_MEM_HOST_PM_SLEEP_WAIT_D3 state. + * @ipc_pm: Pointer to power management component + * + * Returns: true on success, false if the host was not active. + */ +bool ipc_pm_prepare_host_sleep(struct iosm_pm *ipc_pm); + +/** + * ipc_pm_prepare_host_active - Prepare the PM for wakeup by entering + * IPC_MEM_HOST_PM_ACTIVE_WAIT state. + * @ipc_pm: Pointer to power management component + * + * Returns: true on success, false if the host was not sleeping. + */ +bool ipc_pm_prepare_host_active(struct iosm_pm *ipc_pm); + +/** + * ipc_pm_wait_for_device_active - Wait for up to IPC_PM_ACTIVE_TIMEOUT_MS ms + * for the device to reach active state + * @ipc_pm: Pointer to power management component + * + * Returns: true if device is active + */ +bool ipc_pm_wait_for_device_active(struct iosm_pm *ipc_pm); + +/** + * ipc_pm_signal_hpda_doorbell - Wake up the device if it is in low power mode + * and trigger a head pointer update interrupt. + * @ipc_pm: Pointer to power management component + * @identifier: specifies what component triggered hpda update irq + * @host_slp_check: if set to true then Host Sleep state machine check will + * be performed. If Host Sleep state machine allows HP + * update then only doorbell is triggered otherwise pending + * flag will be set. If set to false then Host Sleep check + * will not be performed. This is helpful for Host Sleep + * negotiation through message ring. + */ +void ipc_pm_signal_hpda_doorbell(struct iosm_pm *ipc_pm, u32 identifier, + bool host_slp_check); +/** + * ipc_pm_host_slp_reinit_dev_active_completion - This function initializes + * the atomic variable and + * completion object used to + * get notification about + * Device Sleep state machine + * changed to ACTIVE state + * so that Sleep negotiation + * can be started. + * @ipc_pm: Pointer to power management component + */ +void ipc_pm_host_slp_reinit_dev_active_completion(struct iosm_pm *ipc_pm); + +/** + * ipc_pm_trigger - Update power manager and wake up the link if needed + * @ipc_pm: Pointer to power management component + * @unit: Power management units + * @active: Device link state + * + * Returns: true if link is active. + */ +bool ipc_pm_trigger(struct iosm_pm *ipc_pm, enum ipc_pm_unit unit, bool active); + +#endif