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qcacld-3.0: Provide cdf apis for runtime suspend

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Provide apis to allow and prevent runtime suspend.

Change-Id: I7604659d257823f436ff370715f421d58ce25d3a
CRs-Fixed: 935300
This commit is contained in:
Houston Hoffman 2015-11-02 14:29:35 -08:00 • committed by Akash Patel
commit 61b798b75d
2 changed files with 168 additions and 2 deletions
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12
core/cdf/inc/cdf_lock.h
View file

@ -1,5 +1,5 @@
/*
* 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

158
core/cdf/src/cdf_lock.c
View file

@ -1,5 +1,5 @@
/*
* 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);
}