qcacld-3.0: Provide cdf apis for runtime suspend (d2d9bd96) · Commits · e / devices / android_kernel_fairphone_FP4

core/cdf/inc/cdf_lock.h

+11 −1

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2014-2015 The Linux Foundation. All rights reserved.
		* Copyright (c) 2014-2016 The Linux Foundation. All rights reserved.
		*
		* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
		*
		@@ -262,6 +262,16 @@ CDF_STATUS cdf_wake_lock_release(cdf_wake_lock_t *pLock, uint32_t reason);
		*/
		CDF_STATUS cdf_wake_lock_destroy(cdf_wake_lock_t *pLock);

		struct hif_pm_runtime_lock;
		typedef struct hif_pm_runtime_lock *cdf_runtime_lock_t;

		CDF_STATUS cdf_runtime_pm_get(void);
		CDF_STATUS cdf_runtime_pm_put(void);
		CDF_STATUS cdf_runtime_pm_prevent_suspend(cdf_runtime_lock_t lock);
		CDF_STATUS cdf_runtime_pm_allow_suspend(cdf_runtime_lock_t lock);
		cdf_runtime_lock_t cdf_runtime_lock_init(const char *name);
		void cdf_runtime_lock_deinit(cdf_runtime_lock_t lock);

		/**
		* cdf_spinlock_acquire() - acquires a spin lock
		* @lock: Spin lock to acquire

core/cdf/src/cdf_lock.c

+157 −1

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2014-2015 The Linux Foundation. All rights reserved.
		* Copyright (c) 2014-2016 The Linux Foundation. All rights reserved.
		*
		* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
		*
		@@ -46,6 +46,7 @@
		#include "i_host_diag_core_event.h"
		#include "cds_api.h"
		#include "ani_global.h"
		#include "hif.h"

		/* Preprocessor Definitions and Constants */
		#define LINUX_LOCK_COOKIE 0x12345678
		@@ -489,3 +490,158 @@ CDF_STATUS cdf_wake_lock_destroy(cdf_wake_lock_t *pLock)
		#endif
		return CDF_STATUS_SUCCESS;
		}

		/**
		* cdf_runtime_pm_get() - do a get opperation on the device
		*
		* A get opperation will prevent a runtime suspend untill a
		* corresponding put is done. This api should be used when sending
		* data.
		*
		* CONTRARY TO THE REGULAR RUNTIME PM, WHEN THE BUS IS SUSPENDED,
		* THIS API WILL ONLY REQUEST THE RESUME AND NOT TO A GET!!!
		*
		* return: success if the bus is up and a get has been issued
		* otherwise an error code.
		*/
		CDF_STATUS cdf_runtime_pm_get(void)
		{
		void *ol_sc;
		int ret;

		ol_sc = cds_get_context(CDF_MODULE_ID_HIF);

		if (ol_sc == NULL) {
		CDF_ASSERT(0);
		CDF_TRACE(CDF_MODULE_ID_CDF, CDF_TRACE_LEVEL_ERROR,
		"%s: HIF context is null!", __func__);
		return CDF_STATUS_E_INVAL;
		}

		ret = hif_pm_runtime_get(ol_sc);

		if (ret)
		return CDF_STATUS_E_FAILURE;

		return CDF_STATUS_SUCCESS;
		}

		/**
		* cdf_runtime_pm_put() - do a put opperation on the device
		*
		* A put opperation will allow a runtime suspend after a corresponding
		* get was done. This api should be used when sending data.
		*
		* This api will return a failure if the hif module hasn't been initialized
		*
		* return: CDF_STATUS_SUCCESS if the put is performed
		*/
		CDF_STATUS cdf_runtime_pm_put(void)
		{
		void *ol_sc;
		int ret;

		ol_sc = cds_get_context(CDF_MODULE_ID_HIF);

		if (ol_sc == NULL) {
		CDF_ASSERT(0);
		CDF_TRACE(CDF_MODULE_ID_CDF, CDF_TRACE_LEVEL_ERROR,
		"%s: HIF context is null!", __func__);
		return CDF_STATUS_E_INVAL;
		}

		ret = hif_pm_runtime_put(ol_sc);

		if (ret)
		return CDF_STATUS_E_FAILURE;

		return CDF_STATUS_SUCCESS;
		}

		/**
		* cdf_runtime_pm_prevent_suspend() - prevent a runtime bus suspend
		* @lock: an opaque context for tracking
		*
		* The lock can only be acquired once per lock context and is tracked.
		*
		* return: CDF_STATUS_SUCCESS or failure code.
		*/
		CDF_STATUS cdf_runtime_pm_prevent_suspend(cdf_runtime_lock_t lock)
		{
		void *ol_sc;
		int ret;

		ol_sc = cds_get_context(CDF_MODULE_ID_HIF);

		if (ol_sc == NULL) {
		CDF_ASSERT(0);
		CDF_TRACE(CDF_MODULE_ID_CDF, CDF_TRACE_LEVEL_ERROR,
		"%s: HIF context is null!", __func__);
		return CDF_STATUS_E_INVAL;
		}

		ret = hif_pm_runtime_prevent_suspend(ol_sc, lock);

		if (ret)
		return CDF_STATUS_E_FAILURE;

		return CDF_STATUS_SUCCESS;
		}

		/**
		* cdf_runtime_pm_prevent_suspend() - prevent a runtime bus suspend
		* @lock: an opaque context for tracking
		*
		* The lock can only be acquired once per lock context and is tracked.
		*
		* return: CDF_STATUS_SUCCESS or failure code.
		*/
		CDF_STATUS cdf_runtime_pm_allow_suspend(cdf_runtime_lock_t lock)
		{
		void *ol_sc;
		int ret;

		ol_sc = cds_get_context(CDF_MODULE_ID_HIF);

		if (ol_sc == NULL) {
		CDF_ASSERT(0);
		CDF_TRACE(CDF_MODULE_ID_CDF, CDF_TRACE_LEVEL_ERROR,
		"%s: HIF context is null!", __func__);
		return CDF_STATUS_E_INVAL;
		}

		ret = hif_pm_runtime_allow_suspend(ol_sc, lock);

		if (ret)
		return CDF_STATUS_E_FAILURE;

		return CDF_STATUS_SUCCESS;
		}

		/**
		* cdf_runtime_lock_init() - initialize runtime lock
		* @name: name of the runtime lock
		*
		* Initialize a runtime pm lock. This lock can be used
		* to prevent the runtime pm system from putting the bus
		* to sleep.
		*
		* Return: runtime_pm_lock_t
		*/
		cdf_runtime_lock_t cdf_runtime_lock_init(const char *name)
		{
		return hif_runtime_lock_init(name);
		}

		/**
		* cdf_runtime_lock_deinit() - deinitialize runtime pm lock
		* @lock: the lock to deinitialize
		*
		* Ensures the lock is released. Frees the runtime lock.
		*
		* Return: void
		*/
		void cdf_runtime_lock_deinit(cdf_runtime_lock_t lock)
		{
		hif_runtime_lock_deinit(lock);
		}