Commit 93cb679a authored by Vladimir Kondratiev's avatar Vladimir Kondratiev Committed by Kalle Valo
Browse files

wil6210: system power management 



Support for the system suspend/resume.
In preparation for the run-time PM, implementation made
run-time PM friendly: common for system and run-time PM
code factored out as generic functions, albeit is_runtime
parameter value is always false currently.

For debug purposes, "PM" debug category introduced.

Policy: AP-like interface can't be suspended; otherwise
suspend is allowed. Hardware brought down if interface
was up. Connection, if existed, get lost.
Interface will be brought up upon resume if it was up
before suspend.

Signed-off-by: default avatarVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 0553640d

drivers/net/wireless/ath/wil6210/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ wil6210-y += debug.o 
wil6210-y += rx_reorder.o

wil6210-y += ioctl.o

wil6210-y += fw.o

wil6210-y += pm.o

wil6210-y += pmc.o

wil6210-$(CONFIG_WIL6210_TRACING) += trace.o

wil6210-y += wil_platform.o

drivers/net/wireless/ath/wil6210/pcie_bus.c

+69 −0
Original line number Diff line number Diff line
@@ -259,11 +259,80 @@ static const struct pci_device_id wil6210_pcie_ids[] = { 
};

MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);



#ifdef CONFIG_PM



static int wil6210_suspend(struct device *dev, bool is_runtime)

{

	int rc = 0;

	struct pci_dev *pdev = to_pci_dev(dev);

	struct wil6210_priv *wil = pci_get_drvdata(pdev);



	wil_dbg_pm(wil, "%s(%s)\n", __func__,

		   is_runtime ? "runtime" : "system");



	rc = wil_can_suspend(wil, is_runtime);

	if (rc)

		goto out;



	rc = wil_suspend(wil, is_runtime);

	if (rc)

		goto out;



	/* TODO: how do I bring card in low power state? */



	/* disable bus mastering */

	pci_clear_master(pdev);

	/* PCI will call pci_save_state(pdev) and pci_prepare_to_sleep(pdev) */



out:

	return rc;

}



static int wil6210_resume(struct device *dev, bool is_runtime)

{

	int rc = 0;

	struct pci_dev *pdev = to_pci_dev(dev);

	struct wil6210_priv *wil = pci_get_drvdata(pdev);



	wil_dbg_pm(wil, "%s(%s)\n", __func__,

		   is_runtime ? "runtime" : "system");



	/* allow master */

	pci_set_master(pdev);



	rc = wil_resume(wil, is_runtime);

	if (rc)

		pci_clear_master(pdev);



	return rc;

}



#ifdef CONFIG_PM_SLEEP

static int wil6210_pm_suspend(struct device *dev)

{

	return wil6210_suspend(dev, false);

}



static int wil6210_pm_resume(struct device *dev)

{

	return wil6210_resume(dev, false);

}

#endif /* CONFIG_PM_SLEEP */



#endif /* CONFIG_PM */



static const struct dev_pm_ops wil6210_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(wil6210_pm_suspend, wil6210_pm_resume)

};



static struct pci_driver wil6210_driver = {

	.probe		= wil_pcie_probe,

	.remove		= wil_pcie_remove,

	.id_table	= wil6210_pcie_ids,

	.name		= WIL_NAME,

	.driver		= {

		.pm = &wil6210_pm_ops,

	},

};



static int __init wil6210_driver_init(void)

drivers/net/wireless/ath/wil6210/pm.c

0 → 100644
+98 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2014 Qualcomm Atheros, Inc.

 *

 * Permission to use, copy, modify, and/or distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */



#include "wil6210.h"



int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)

{

	int rc = 0;

	struct wireless_dev *wdev = wil->wdev;



	wil_dbg_pm(wil, "%s(%s)\n", __func__,

		   is_runtime ? "runtime" : "system");



	switch (wdev->iftype) {

	case NL80211_IFTYPE_MONITOR:

	case NL80211_IFTYPE_STATION:

	case NL80211_IFTYPE_P2P_CLIENT:

		break;

	/* AP-like interface - can't suspend */

	default:

		wil_dbg_pm(wil, "AP-like interface\n");

		rc = -EBUSY;

		break;

	}



	wil_dbg_pm(wil, "%s(%s) => %s (%d)\n", __func__,

		   is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);



	return rc;

}



int wil_suspend(struct wil6210_priv *wil, bool is_runtime)

{

	int rc = 0;

	struct net_device *ndev = wil_to_ndev(wil);



	wil_dbg_pm(wil, "%s(%s)\n", __func__,

		   is_runtime ? "runtime" : "system");



	/* if netif up, hardware is alive, shut it down */

	if (ndev->flags & IFF_UP) {

		rc = wil_down(wil);

		if (rc) {

			wil_err(wil, "wil_down : %d\n", rc);

			goto out;

		}

	}



	if (wil->platform_ops.suspend)

		rc = wil->platform_ops.suspend(wil->platform_handle);



out:

	wil_dbg_pm(wil, "%s(%s) => %d\n", __func__,

		   is_runtime ? "runtime" : "system", rc);

	return rc;

}



int wil_resume(struct wil6210_priv *wil, bool is_runtime)

{

	int rc = 0;

	struct net_device *ndev = wil_to_ndev(wil);



	wil_dbg_pm(wil, "%s(%s)\n", __func__,

		   is_runtime ? "runtime" : "system");



	if (wil->platform_ops.resume) {

		rc = wil->platform_ops.resume(wil->platform_handle);

		if (rc) {

			wil_err(wil, "platform_ops.resume : %d\n", rc);

			goto out;

		}

	}



	/* if netif up, bring hardware up

	 * During open(), IFF_UP set after actual device method

	 * invocation. This prevent recursive call to wil_up()

	 */

	if (ndev->flags & IFF_UP)

		rc = wil_up(wil);



out:

	wil_dbg_pm(wil, "%s(%s) => %d\n", __func__,

		   is_runtime ? "runtime" : "system", rc);

	return rc;

}

drivers/net/wireless/ath/wil6210/wil6210.h

+5 −0
Original line number Diff line number Diff line
@@ -647,6 +647,7 @@ void wil_info(struct wil6210_priv *wil, const char *fmt, ...); 
#define wil_dbg_txrx(wil, fmt, arg...) wil_dbg(wil, "DBG[TXRX]" fmt, ##arg)

#define wil_dbg_wmi(wil, fmt, arg...) wil_dbg(wil, "DBG[ WMI]" fmt, ##arg)

#define wil_dbg_misc(wil, fmt, arg...) wil_dbg(wil, "DBG[MISC]" fmt, ##arg)

#define wil_dbg_pm(wil, fmt, arg...) wil_dbg(wil, "DBG[ PM ]" fmt, ##arg)



/* target operations */

/* register read */
@@ -815,4 +816,8 @@ int wil_iftype_nl2wmi(enum nl80211_iftype type); 
int wil_ioctl(struct wil6210_priv *wil, void __user *data, int cmd);

int wil_request_firmware(struct wil6210_priv *wil, const char *name);



int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime);

int wil_suspend(struct wil6210_priv *wil, bool is_runtime);

int wil_resume(struct wil6210_priv *wil, bool is_runtime);



#endif /* __WIL6210_H__ */

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