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Commit 466cb5b6 authored by Houston Hoffman's avatar Houston Hoffman Committed by Akash Patel
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qcacld-3.0: Coordinate runtime suspend from hdd 

HDD interfaces with the platform driver.  Runtime suspend
is a callback registered with the platform driver.  Coordinate
runtime suspend from hdd since it is both the logical entry point
and knows what other layers need to participate in a runtime suspend.

Change-Id: I80b71e504d0cd31bd5a8e47895db7e0bd233f6c3
CRs-Fixed: 935300
parent 0c83a5b0

core/hdd/src/wlan_hdd_driver_ops.c

+153 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
#include "cds_sched.h"

#include "osdep.h"

#include "hif.h"

#include "htc.h"

#include "epping_main.h"

#include "wlan_hdd_main.h"

#include "wlan_hdd_power.h"
@@ -524,6 +525,120 @@ static int wlan_hdd_bus_resume(void) 
	return ret;

}



#ifdef FEATURE_RUNTIME_PM



/**

 * __wlan_hdd_runtime_suspend() - suspend the wlan bus without apps suspend

 *

 * Each layer is responsible for its own suspend actions.  wma_runtime_suspend

 * takes care of the parts of the 802.11 suspend that we want to do for runtime

 * suspend.

 *

 * Return: 0 or errno

 */

static int __wlan_hdd_runtime_suspend(void)

{

	void *hdd_ctx = cds_get_context(CDF_MODULE_ID_HDD);

	int status = wlan_hdd_validate_context(hdd_ctx);



	if (0 != status)

		return status;



	if (!hif_can_suspend_link()) {

		hdd_err("Runtime PM not supported for link up suspend");

		return -EINVAL;

	}



	hif_runtime_pm_set_state_inprogress();

	status = htc_runtime_suspend();

	if (status)

		goto set_state;



	status = wma_runtime_suspend();

	if (status)

		goto resume_htc;



	status = hif_runtime_suspend();

	if (status)

		goto resume_wma;



	status = cnss_auto_suspend();

	if (status)

		goto resume_hif;



	hif_runtime_pm_set_state_suspended();

	return status;



resume_hif:

	CDF_BUG(!hif_runtime_resume());

resume_wma:

	CDF_BUG(!wma_runtime_resume());

resume_htc:

	CDF_BUG(!htc_runtime_resume());

set_state:

	hif_runtime_pm_set_state_on();

	return status;

}





/**

 * wlan_hdd_runtime_suspend() - suspend the wlan bus without apps suspend

 *

 * This function is called by the platform driver to suspend the

 * wlan bus separately from system suspend

 *

 * Return: 0 or errno

 */

static int wlan_hdd_runtime_suspend(void)

{

	int ret;



	cds_ssr_protect(__func__);

	ret = __wlan_hdd_runtime_suspend();

	cds_ssr_unprotect(__func__);



	return ret;

}



/**

 * __wlan_hdd_runtime_resume() - resume the wlan bus from runtime suspend

 *

 * Sets the runtime pm state and coordinates resume between hif wma and

 * ol_txrx.

 *

 * Return: success since failure is a bug

 */

static int __wlan_hdd_runtime_resume(void)

{

	hif_runtime_pm_set_state_inprogress();

	CDF_BUG(!cnss_auto_resume());

	CDF_BUG(!hif_runtime_resume());

	CDF_BUG(!wma_runtime_resume());

	CDF_BUG(!htc_runtime_resume());

	hif_runtime_pm_set_state_on();

	return 0;

}



/**

 * wlan_hdd_runtime_resume() - resume the wlan bus from runtime suspend

 *

 * This function is called by the platform driver to resume the

 * wlan bus separately from system suspend

 *

 * Return: success since failure is a bug

 */

static int wlan_hdd_runtime_resume(void)

{

	int ret;



	cds_ssr_protect(__func__);

	ret = __wlan_hdd_runtime_resume();

	cds_ssr_unprotect(__func__);



	return ret;

}

#endif



#ifdef HIF_PCI

/**

 * wlan_hdd_pci_probe() - probe callback for pci platform driver
@@ -618,6 +733,32 @@ static int wlan_hdd_pci_resume(struct pci_dev *pdev) 
{

	return wlan_hdd_bus_resume();

}



#ifdef FEATURE_RUNTIME_PM

/**

 * wlan_hdd_pci_runtime_suspend() - wlan_hdd_pci_suspend

 * @pdev: pdev

 * @state: state

 *

 * Return: success or errno

 */

static int wlan_hdd_pci_runtime_suspend(struct pci_dev *pdev)

{

	return wlan_hdd_runtime_suspend();

}



/**

 * wlan_hdd_pci_runtime_resume() - runtime resume callback to register with pci

 * @pdev: pci device id

 *

 * Return: success or errno

 */

static int wlan_hdd_pci_runtime_resume(struct pci_dev *pdev)

{

	return wlan_hdd_runtime_resume();

}

#endif



#else

/**

 * wlan_hdd_snoc_probe() - wlan_hdd_snoc_probe
@@ -709,6 +850,14 @@ static struct pci_device_id wlan_hdd_pci_id_table[] = { 
};



#ifdef CONFIG_CNSS



#ifdef FEATURE_RUNTIME_PM

struct cnss_wlan_runtime_ops runtime_pm_ops = {

	.runtime_suspend = wlan_hdd_pci_runtime_suspend,

	.runtime_resume = wlan_hdd_pci_runtime_resume,

};

#endif



struct cnss_wlan_driver wlan_drv_ops = {

	.name       = "wlan_hdd_pci",

	.id_table   = wlan_hdd_pci_id_table,
@@ -722,6 +871,9 @@ struct cnss_wlan_driver wlan_drv_ops = { 
	.suspend    = wlan_hdd_pci_suspend,

	.resume     = wlan_hdd_pci_resume,

#endif /* ATH_BUS_PM */

#ifdef FEATURE_RUNTIME_PM

	.runtime_ops = &runtime_pm_ops,

#endif

};

#else

MODULE_DEVICE_TABLE(pci, wlan_hdd_pci_id_table);
@@ -734,6 +886,7 @@ struct pci_driver wlan_drv_ops = { 
	.suspend    = wlan_hdd_pci_suspend,

	.resume     = wlan_hdd_pci_resume,

#endif /* ATH_BUS_PM */



};

#endif /* CONFIG_CNSS */

#else