drivers/net/wireless/ath/wil6210/pm.c - linux - Git at Google

 // SPDX-License-Identifier: ISC
 /*
  * Copyright (c) 2014,2017 Qualcomm Atheros, Inc.
  * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
  */

 #include "wil6210.h"
 #include <linux/jiffies.h>
 #include <linux/pm_runtime.h>

 #define WIL6210_AUTOSUSPEND_DELAY_MS (1000)

 static void wil_pm_wake_connected_net_queues(struct wil6210_priv *wil)
 {
 	int i;

 	mutex_lock(&wil->vif_mutex);
 	for (i = 0; i < GET_MAX_VIFS(wil); i++) {
 		struct wil6210_vif *vif = wil->vifs[i];

 		if (vif && test_bit(wil_vif_fwconnected, vif->status))
 			wil_update_net_queues_bh(wil, vif, NULL, false);
 	}
 	mutex_unlock(&wil->vif_mutex);
 }

 static void wil_pm_stop_all_net_queues(struct wil6210_priv *wil)
 {
 	int i;

 	mutex_lock(&wil->vif_mutex);
 	for (i = 0; i < GET_MAX_VIFS(wil); i++) {
 		struct wil6210_vif *vif = wil->vifs[i];

 		if (vif)
 			wil_update_net_queues_bh(wil, vif, NULL, true);
 	}
 	mutex_unlock(&wil->vif_mutex);
 }

 static bool
 wil_can_suspend_vif(struct wil6210_priv *wil, struct wil6210_vif *vif,
 		    bool is_runtime)
 {
 	struct wireless_dev *wdev = vif_to_wdev(vif);

 	switch (wdev->iftype) {
 	case NL80211_IFTYPE_MONITOR:
 		wil_dbg_pm(wil, "Sniffer\n");
 		return false;

 	/* for STA-like interface, don't runtime suspend */
 	case NL80211_IFTYPE_STATION:
 	case NL80211_IFTYPE_P2P_CLIENT:
 		if (test_bit(wil_vif_fwconnecting, vif->status)) {
 			wil_dbg_pm(wil, "Delay suspend when connecting\n");
 			return false;
 		}
 		if (is_runtime) {
 			wil_dbg_pm(wil, "STA-like interface\n");
 			return false;
 		}
 		break;
 	/* AP-like interface - can't suspend */
 	default:
 		wil_dbg_pm(wil, "AP-like interface\n");
 		return false;
 	}

 	return true;
 }

 int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
 {
 	int rc = 0, i;
 	bool wmi_only = test_bit(WMI_FW_CAPABILITY_WMI_ONLY,
 				 wil->fw_capabilities);
 	bool active_ifaces;

 	wil_dbg_pm(wil, "can_suspend: %s\n", is_runtime ? "runtime" : "system");

 	if (wmi_only || debug_fw) {
 		wil_dbg_pm(wil, "Deny any suspend - %s mode\n",
 			   wmi_only ? "wmi_only" : "debug_fw");
 		rc = -EBUSY;
 		goto out;
 	}
 	if (is_runtime && !wil->platform_ops.suspend) {
 		rc = -EBUSY;
 		goto out;
 	}

 	mutex_lock(&wil->vif_mutex);
 	active_ifaces = wil_has_active_ifaces(wil, true, false);
 	mutex_unlock(&wil->vif_mutex);

 	if (!active_ifaces) {
 		/* can always sleep when down */
 		wil_dbg_pm(wil, "Interface is down\n");
 		goto out;
 	}
 	if (test_bit(wil_status_resetting, wil->status)) {
 		wil_dbg_pm(wil, "Delay suspend when resetting\n");
 		rc = -EBUSY;
 		goto out;
 	}
 	if (wil->recovery_state != fw_recovery_idle) {
 		wil_dbg_pm(wil, "Delay suspend during recovery\n");
 		rc = -EBUSY;
 		goto out;
 	}

 	/* interface is running */
 	mutex_lock(&wil->vif_mutex);
 	for (i = 0; i < GET_MAX_VIFS(wil); i++) {
 		struct wil6210_vif *vif = wil->vifs[i];

 		if (!vif)
 			continue;
 		if (!wil_can_suspend_vif(wil, vif, is_runtime)) {
 			rc = -EBUSY;
 			mutex_unlock(&wil->vif_mutex);
 			goto out;
 		}
 	}
 	mutex_unlock(&wil->vif_mutex);

 out:
 	wil_dbg_pm(wil, "can_suspend: %s => %s (%d)\n",
 		   is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);

 	if (rc)
 		wil->suspend_stats.rejected_by_host++;

 	return rc;
 }

 static int wil_resume_keep_radio_on(struct wil6210_priv *wil)
 {
 	int rc = 0;

 	/* wil_status_resuming will be cleared when getting
 	 * WMI_TRAFFIC_RESUME_EVENTID
 	 */
 	set_bit(wil_status_resuming, wil->status);
 	clear_bit(wil_status_suspended, wil->status);
 	wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 	wil_unmask_irq(wil);

 	wil6210_bus_request(wil, wil->bus_request_kbps_pre_suspend);

 	/* Send WMI resume request to the device */
 	rc = wmi_resume(wil);
 	if (rc) {
 		wil_err(wil, "device failed to resume (%d)\n", rc);
 		if (no_fw_recovery)
 			goto out;
 		rc = wil_down(wil);
 		if (rc) {
 			wil_err(wil, "wil_down failed (%d)\n", rc);
 			goto out;
 		}
 		rc = wil_up(wil);
 		if (rc) {
 			wil_err(wil, "wil_up failed (%d)\n", rc);
 			goto out;
 		}
 	}

 	/* Wake all queues */
 	wil_pm_wake_connected_net_queues(wil);

 out:
 	if (rc)
 		set_bit(wil_status_suspended, wil->status);
 	return rc;
 }

 static int wil_suspend_keep_radio_on(struct wil6210_priv *wil)
 {
 	int rc = 0;
 	unsigned long data_comp_to;

 	wil_dbg_pm(wil, "suspend keep radio on\n");

 	/* Prevent handling of new tx and wmi commands */
 	rc = down_write_trylock(&wil->mem_lock);
 	if (!rc) {
 		wil_err(wil,
 			"device is busy. down_write_trylock failed, returned (0x%x)\n",
 			rc);
 		wil->suspend_stats.rejected_by_host++;
 		return -EBUSY;
 	}

 	set_bit(wil_status_suspending, wil->status);
 	up_write(&wil->mem_lock);

 	wil_pm_stop_all_net_queues(wil);

 	if (!wil_is_tx_idle(wil)) {
 		wil_dbg_pm(wil, "Pending TX data, reject suspend\n");
 		wil->suspend_stats.rejected_by_host++;
 		goto reject_suspend;
 	}

 	if (!wil->txrx_ops.is_rx_idle(wil)) {
 		wil_dbg_pm(wil, "Pending RX data, reject suspend\n");
 		wil->suspend_stats.rejected_by_host++;
 		goto reject_suspend;
 	}

 	if (!wil_is_wmi_idle(wil)) {
 		wil_dbg_pm(wil, "Pending WMI events, reject suspend\n");
 		wil->suspend_stats.rejected_by_host++;
 		goto reject_suspend;
 	}

 	/* Send WMI suspend request to the device */
 	rc = wmi_suspend(wil);
 	if (rc) {
 		wil_dbg_pm(wil, "wmi_suspend failed, reject suspend (%d)\n",
 			   rc);
 		goto reject_suspend;
 	}

 	/* Wait for completion of the pending RX packets */
 	data_comp_to = jiffies + msecs_to_jiffies(WIL_DATA_COMPLETION_TO_MS);
 	if (test_bit(wil_status_napi_en, wil->status)) {
 		while (!wil->txrx_ops.is_rx_idle(wil)) {
 			if (time_after(jiffies, data_comp_to)) {
 				if (wil->txrx_ops.is_rx_idle(wil))
 					break;
 				wil_err(wil,
 					"TO waiting for idle RX, suspend failed\n");
 				wil->suspend_stats.r_on.failed_suspends++;
 				goto resume_after_fail;
 			}
 			wil_dbg_ratelimited(wil, "rx vring is not empty -> NAPI\n");
 			napi_synchronize(&wil->napi_rx);
 			msleep(20);
 		}
 	}

 	/* In case of pending WMI events, reject the suspend
 	 * and resume the device.
 	 * This can happen if the device sent the WMI events before
 	 * approving the suspend.
 	 */
 	if (!wil_is_wmi_idle(wil)) {
 		wil_err(wil, "suspend failed due to pending WMI events\n");
 		wil->suspend_stats.r_on.failed_suspends++;
 		goto resume_after_fail;
 	}

 	wil_mask_irq(wil);

 	/* Disable device reset on PERST */
 	wil_s(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);

 	if (wil->platform_ops.suspend) {
 		rc = wil->platform_ops.suspend(wil->platform_handle, true);
 		if (rc) {
 			wil_err(wil, "platform device failed to suspend (%d)\n",
 				rc);
 			wil->suspend_stats.r_on.failed_suspends++;
 			wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 			wil_unmask_irq(wil);
 			goto resume_after_fail;
 		}
 	}

 	/* Save the current bus request to return to the same in resume */
 	wil->bus_request_kbps_pre_suspend = wil->bus_request_kbps;
 	wil6210_bus_request(wil, 0);

 	set_bit(wil_status_suspended, wil->status);
 	clear_bit(wil_status_suspending, wil->status);

 	return rc;

 resume_after_fail:
 	set_bit(wil_status_resuming, wil->status);
 	clear_bit(wil_status_suspending, wil->status);
 	rc = wmi_resume(wil);
 	/* if resume succeeded, reject the suspend */
 	if (!rc) {
 		rc = -EBUSY;
 		wil_pm_wake_connected_net_queues(wil);
 	}
 	return rc;

 reject_suspend:
 	clear_bit(wil_status_suspending, wil->status);
 	wil_pm_wake_connected_net_queues(wil);
 	return -EBUSY;
 }

 static int wil_suspend_radio_off(struct wil6210_priv *wil)
 {
 	int rc = 0;
 	bool active_ifaces;

 	wil_dbg_pm(wil, "suspend radio off\n");

 	rc = down_write_trylock(&wil->mem_lock);
 	if (!rc) {
 		wil_err(wil,
 			"device is busy. down_write_trylock failed, returned (0x%x)\n",
 			rc);
 		wil->suspend_stats.rejected_by_host++;
 		return -EBUSY;
 	}

 	set_bit(wil_status_suspending, wil->status);
 	up_write(&wil->mem_lock);

 	/* if netif up, hardware is alive, shut it down */
 	mutex_lock(&wil->vif_mutex);
 	active_ifaces = wil_has_active_ifaces(wil, true, false);
 	mutex_unlock(&wil->vif_mutex);

 	if (active_ifaces) {
 		rc = wil_down(wil);
 		if (rc) {
 			wil_err(wil, "wil_down : %d\n", rc);
 			wil->suspend_stats.r_off.failed_suspends++;
 			goto out;
 		}
 	}

 	/* Disable PCIe IRQ to prevent sporadic IRQs when PCIe is suspending */
 	wil_dbg_pm(wil, "Disabling PCIe IRQ before suspending\n");
 	wil_disable_irq(wil);

 	if (wil->platform_ops.suspend) {
 		rc = wil->platform_ops.suspend(wil->platform_handle, false);
 		if (rc) {
 			wil_enable_irq(wil);
 			wil->suspend_stats.r_off.failed_suspends++;
 			goto out;
 		}
 	}

 	set_bit(wil_status_suspended, wil->status);

 out:
 	clear_bit(wil_status_suspending, wil->status);
 	wil_dbg_pm(wil, "suspend radio off: %d\n", rc);

 	return rc;
 }

 static int wil_resume_radio_off(struct wil6210_priv *wil)
 {
 	int rc = 0;
 	bool active_ifaces;

 	wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
 	wil_enable_irq(wil);
 	/* if any netif up, bring hardware up
 	 * During open(), IFF_UP set after actual device method
 	 * invocation. This prevent recursive call to wil_up()
 	 * wil_status_suspended will be cleared in wil_reset
 	 */
 	mutex_lock(&wil->vif_mutex);
 	active_ifaces = wil_has_active_ifaces(wil, true, false);
 	mutex_unlock(&wil->vif_mutex);
 	if (active_ifaces)
 		rc = wil_up(wil);
 	else
 		clear_bit(wil_status_suspended, wil->status);

 	return rc;
 }

 int wil_suspend(struct wil6210_priv *wil, bool is_runtime, bool keep_radio_on)
 {
 	int rc = 0;

 	wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");

 	if (test_bit(wil_status_suspended, wil->status)) {
 		wil_dbg_pm(wil, "trying to suspend while suspended\n");
 		return 0;
 	}

 	if (!keep_radio_on)
 		rc = wil_suspend_radio_off(wil);
 	else
 		rc = wil_suspend_keep_radio_on(wil);

 	wil_dbg_pm(wil, "suspend: %s => %d\n",
 		   is_runtime ? "runtime" : "system", rc);

 	return rc;
 }

 int wil_resume(struct wil6210_priv *wil, bool is_runtime, bool keep_radio_on)
 {
 	int rc = 0;

 	wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");

 	if (wil->platform_ops.resume) {
 		rc = wil->platform_ops.resume(wil->platform_handle,
 					      keep_radio_on);
 		if (rc) {
 			wil_err(wil, "platform_ops.resume : %d\n", rc);
 			goto out;
 		}
 	}

 	if (keep_radio_on)
 		rc = wil_resume_keep_radio_on(wil);
 	else
 		rc = wil_resume_radio_off(wil);

 out:
 	wil_dbg_pm(wil, "resume: %s => %d\n", is_runtime ? "runtime" : "system",
 		   rc);
 	return rc;
 }

 void wil_pm_runtime_allow(struct wil6210_priv *wil)
 {
 	struct device *dev = wil_to_dev(wil);

 	pm_runtime_put_noidle(dev);
 	pm_runtime_set_autosuspend_delay(dev, WIL6210_AUTOSUSPEND_DELAY_MS);
 	pm_runtime_use_autosuspend(dev);
 	pm_runtime_allow(dev);
 }

 void wil_pm_runtime_forbid(struct wil6210_priv *wil)
 {
 	struct device *dev = wil_to_dev(wil);

 	pm_runtime_forbid(dev);
 	pm_runtime_get_noresume(dev);
 }

 int wil_pm_runtime_get(struct wil6210_priv *wil)
 {
 	int rc;
 	struct device *dev = wil_to_dev(wil);

 	rc = pm_runtime_get_sync(dev);
 	if (rc < 0) {
 		wil_err(wil, "pm_runtime_get_sync() failed, rc = %d\n", rc);
 		pm_runtime_put_noidle(dev);
 		return rc;
 	}

 	return 0;
 }

 void wil_pm_runtime_put(struct wil6210_priv *wil)
 {
 	struct device *dev = wil_to_dev(wil);

 	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
 }
	// SPDX-License-Identifier: ISC
	/*
	* Copyright (c) 2014,2017 Qualcomm Atheros, Inc.
	* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
	*/

	#include "wil6210.h"
	#include <linux/jiffies.h>
	#include <linux/pm_runtime.h>

	#define WIL6210_AUTOSUSPEND_DELAY_MS (1000)

	static void wil_pm_wake_connected_net_queues(struct wil6210_priv *wil)
	{
	int i;

	mutex_lock(&wil->vif_mutex);
	for (i = 0; i < GET_MAX_VIFS(wil); i++) {
	struct wil6210_vif *vif = wil->vifs[i];

	if (vif && test_bit(wil_vif_fwconnected, vif->status))
	wil_update_net_queues_bh(wil, vif, NULL, false);
	}
	mutex_unlock(&wil->vif_mutex);
	}

	static void wil_pm_stop_all_net_queues(struct wil6210_priv *wil)
	{
	int i;

	mutex_lock(&wil->vif_mutex);
	for (i = 0; i < GET_MAX_VIFS(wil); i++) {
	struct wil6210_vif *vif = wil->vifs[i];

	if (vif)
	wil_update_net_queues_bh(wil, vif, NULL, true);
	}
	mutex_unlock(&wil->vif_mutex);
	}

	static bool
	wil_can_suspend_vif(struct wil6210_priv wil, struct wil6210_vif vif,
	bool is_runtime)
	{
	struct wireless_dev *wdev = vif_to_wdev(vif);

	switch (wdev->iftype) {
	case NL80211_IFTYPE_MONITOR:
	wil_dbg_pm(wil, "Sniffer\n");
	return false;

	/* for STA-like interface, don't runtime suspend */
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_P2P_CLIENT:
	if (test_bit(wil_vif_fwconnecting, vif->status)) {
	wil_dbg_pm(wil, "Delay suspend when connecting\n");
	return false;
	}
	if (is_runtime) {
	wil_dbg_pm(wil, "STA-like interface\n");
	return false;
	}
	break;
	/* AP-like interface - can't suspend */
	default:
	wil_dbg_pm(wil, "AP-like interface\n");
	return false;
	}

	return true;
	}

	int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
	{
	int rc = 0, i;
	bool wmi_only = test_bit(WMI_FW_CAPABILITY_WMI_ONLY,
	wil->fw_capabilities);
	bool active_ifaces;

	wil_dbg_pm(wil, "can_suspend: %s\n", is_runtime ? "runtime" : "system");

	if (wmi_only \|\| debug_fw) {
	wil_dbg_pm(wil, "Deny any suspend - %s mode\n",
	wmi_only ? "wmi_only" : "debug_fw");
	rc = -EBUSY;
	goto out;
	}
	if (is_runtime && !wil->platform_ops.suspend) {
	rc = -EBUSY;
	goto out;
	}

	mutex_lock(&wil->vif_mutex);
	active_ifaces = wil_has_active_ifaces(wil, true, false);
	mutex_unlock(&wil->vif_mutex);

	if (!active_ifaces) {
	/* can always sleep when down */
	wil_dbg_pm(wil, "Interface is down\n");
	goto out;
	}
	if (test_bit(wil_status_resetting, wil->status)) {
	wil_dbg_pm(wil, "Delay suspend when resetting\n");
	rc = -EBUSY;
	goto out;
	}
	if (wil->recovery_state != fw_recovery_idle) {
	wil_dbg_pm(wil, "Delay suspend during recovery\n");
	rc = -EBUSY;
	goto out;
	}

	/* interface is running */
	mutex_lock(&wil->vif_mutex);
	for (i = 0; i < GET_MAX_VIFS(wil); i++) {
	struct wil6210_vif *vif = wil->vifs[i];

	if (!vif)
	continue;
	if (!wil_can_suspend_vif(wil, vif, is_runtime)) {
	rc = -EBUSY;
	mutex_unlock(&wil->vif_mutex);
	goto out;
	}
	}
	mutex_unlock(&wil->vif_mutex);

	out:
	wil_dbg_pm(wil, "can_suspend: %s => %s (%d)\n",
	is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);

	if (rc)
	wil->suspend_stats.rejected_by_host++;

	return rc;
	}

	static int wil_resume_keep_radio_on(struct wil6210_priv *wil)
	{
	int rc = 0;

	/* wil_status_resuming will be cleared when getting
	* WMI_TRAFFIC_RESUME_EVENTID
	*/
	set_bit(wil_status_resuming, wil->status);
	clear_bit(wil_status_suspended, wil->status);
	wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
	wil_unmask_irq(wil);

	wil6210_bus_request(wil, wil->bus_request_kbps_pre_suspend);

	/* Send WMI resume request to the device */
	rc = wmi_resume(wil);
	if (rc) {
	wil_err(wil, "device failed to resume (%d)\n", rc);
	if (no_fw_recovery)
	goto out;
	rc = wil_down(wil);
	if (rc) {
	wil_err(wil, "wil_down failed (%d)\n", rc);
	goto out;
	}
	rc = wil_up(wil);
	if (rc) {
	wil_err(wil, "wil_up failed (%d)\n", rc);
	goto out;
	}
	}

	/* Wake all queues */
	wil_pm_wake_connected_net_queues(wil);

	out:
	if (rc)
	set_bit(wil_status_suspended, wil->status);
	return rc;
	}

	static int wil_suspend_keep_radio_on(struct wil6210_priv *wil)
	{
	int rc = 0;
	unsigned long data_comp_to;

	wil_dbg_pm(wil, "suspend keep radio on\n");

	/* Prevent handling of new tx and wmi commands */
	rc = down_write_trylock(&wil->mem_lock);
	if (!rc) {
	wil_err(wil,
	"device is busy. down_write_trylock failed, returned (0x%x)\n",
	rc);
	wil->suspend_stats.rejected_by_host++;
	return -EBUSY;
	}

	set_bit(wil_status_suspending, wil->status);
	up_write(&wil->mem_lock);

	wil_pm_stop_all_net_queues(wil);

	if (!wil_is_tx_idle(wil)) {
	wil_dbg_pm(wil, "Pending TX data, reject suspend\n");
	wil->suspend_stats.rejected_by_host++;
	goto reject_suspend;
	}

	if (!wil->txrx_ops.is_rx_idle(wil)) {
	wil_dbg_pm(wil, "Pending RX data, reject suspend\n");
	wil->suspend_stats.rejected_by_host++;
	goto reject_suspend;
	}

	if (!wil_is_wmi_idle(wil)) {
	wil_dbg_pm(wil, "Pending WMI events, reject suspend\n");
	wil->suspend_stats.rejected_by_host++;
	goto reject_suspend;
	}

	/* Send WMI suspend request to the device */
	rc = wmi_suspend(wil);
	if (rc) {
	wil_dbg_pm(wil, "wmi_suspend failed, reject suspend (%d)\n",
	rc);
	goto reject_suspend;
	}

	/* Wait for completion of the pending RX packets */
	data_comp_to = jiffies + msecs_to_jiffies(WIL_DATA_COMPLETION_TO_MS);
	if (test_bit(wil_status_napi_en, wil->status)) {
	while (!wil->txrx_ops.is_rx_idle(wil)) {
	if (time_after(jiffies, data_comp_to)) {
	if (wil->txrx_ops.is_rx_idle(wil))
	break;
	wil_err(wil,
	"TO waiting for idle RX, suspend failed\n");
	wil->suspend_stats.r_on.failed_suspends++;
	goto resume_after_fail;
	}
	wil_dbg_ratelimited(wil, "rx vring is not empty -> NAPI\n");
	napi_synchronize(&wil->napi_rx);
	msleep(20);
	}
	}

	/* In case of pending WMI events, reject the suspend
	* and resume the device.
	* This can happen if the device sent the WMI events before
	* approving the suspend.
	*/
	if (!wil_is_wmi_idle(wil)) {
	wil_err(wil, "suspend failed due to pending WMI events\n");
	wil->suspend_stats.r_on.failed_suspends++;
	goto resume_after_fail;
	}

	wil_mask_irq(wil);

	/* Disable device reset on PERST */
	wil_s(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);

	if (wil->platform_ops.suspend) {
	rc = wil->platform_ops.suspend(wil->platform_handle, true);
	if (rc) {
	wil_err(wil, "platform device failed to suspend (%d)\n",
	rc);
	wil->suspend_stats.r_on.failed_suspends++;
	wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
	wil_unmask_irq(wil);
	goto resume_after_fail;
	}
	}

	/* Save the current bus request to return to the same in resume */
	wil->bus_request_kbps_pre_suspend = wil->bus_request_kbps;
	wil6210_bus_request(wil, 0);

	set_bit(wil_status_suspended, wil->status);
	clear_bit(wil_status_suspending, wil->status);

	return rc;

	resume_after_fail:
	set_bit(wil_status_resuming, wil->status);
	clear_bit(wil_status_suspending, wil->status);
	rc = wmi_resume(wil);
	/* if resume succeeded, reject the suspend */
	if (!rc) {
	rc = -EBUSY;
	wil_pm_wake_connected_net_queues(wil);
	}
	return rc;

	reject_suspend:
	clear_bit(wil_status_suspending, wil->status);
	wil_pm_wake_connected_net_queues(wil);
	return -EBUSY;
	}

	static int wil_suspend_radio_off(struct wil6210_priv *wil)
	{
	int rc = 0;
	bool active_ifaces;

	wil_dbg_pm(wil, "suspend radio off\n");

	rc = down_write_trylock(&wil->mem_lock);
	if (!rc) {
	wil_err(wil,
	"device is busy. down_write_trylock failed, returned (0x%x)\n",
	rc);
	wil->suspend_stats.rejected_by_host++;
	return -EBUSY;
	}

	set_bit(wil_status_suspending, wil->status);
	up_write(&wil->mem_lock);

	/* if netif up, hardware is alive, shut it down */
	mutex_lock(&wil->vif_mutex);
	active_ifaces = wil_has_active_ifaces(wil, true, false);
	mutex_unlock(&wil->vif_mutex);

	if (active_ifaces) {
	rc = wil_down(wil);
	if (rc) {
	wil_err(wil, "wil_down : %d\n", rc);
	wil->suspend_stats.r_off.failed_suspends++;
	goto out;
	}
	}

	/* Disable PCIe IRQ to prevent sporadic IRQs when PCIe is suspending */
	wil_dbg_pm(wil, "Disabling PCIe IRQ before suspending\n");
	wil_disable_irq(wil);

	if (wil->platform_ops.suspend) {
	rc = wil->platform_ops.suspend(wil->platform_handle, false);
	if (rc) {
	wil_enable_irq(wil);
	wil->suspend_stats.r_off.failed_suspends++;
	goto out;
	}
	}

	set_bit(wil_status_suspended, wil->status);

	out:
	clear_bit(wil_status_suspending, wil->status);
	wil_dbg_pm(wil, "suspend radio off: %d\n", rc);

	return rc;
	}

	static int wil_resume_radio_off(struct wil6210_priv *wil)
	{
	int rc = 0;
	bool active_ifaces;

	wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
	wil_enable_irq(wil);
	/* if any netif up, bring hardware up
	* During open(), IFF_UP set after actual device method
	* invocation. This prevent recursive call to wil_up()
	* wil_status_suspended will be cleared in wil_reset
	*/
	mutex_lock(&wil->vif_mutex);
	active_ifaces = wil_has_active_ifaces(wil, true, false);
	mutex_unlock(&wil->vif_mutex);
	if (active_ifaces)
	rc = wil_up(wil);
	else
	clear_bit(wil_status_suspended, wil->status);

	return rc;
	}

	int wil_suspend(struct wil6210_priv *wil, bool is_runtime, bool keep_radio_on)
	{
	int rc = 0;

	wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");

	if (test_bit(wil_status_suspended, wil->status)) {
	wil_dbg_pm(wil, "trying to suspend while suspended\n");
	return 0;
	}

	if (!keep_radio_on)
	rc = wil_suspend_radio_off(wil);
	else
	rc = wil_suspend_keep_radio_on(wil);

	wil_dbg_pm(wil, "suspend: %s => %d\n",
	is_runtime ? "runtime" : "system", rc);

	return rc;
	}

	int wil_resume(struct wil6210_priv *wil, bool is_runtime, bool keep_radio_on)
	{
	int rc = 0;

	wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");

	if (wil->platform_ops.resume) {
	rc = wil->platform_ops.resume(wil->platform_handle,
	keep_radio_on);
	if (rc) {
	wil_err(wil, "platform_ops.resume : %d\n", rc);
	goto out;
	}
	}

	if (keep_radio_on)
	rc = wil_resume_keep_radio_on(wil);
	else
	rc = wil_resume_radio_off(wil);

	out:
	wil_dbg_pm(wil, "resume: %s => %d\n", is_runtime ? "runtime" : "system",
	rc);
	return rc;
	}

	void wil_pm_runtime_allow(struct wil6210_priv *wil)
	{
	struct device *dev = wil_to_dev(wil);

	pm_runtime_put_noidle(dev);
	pm_runtime_set_autosuspend_delay(dev, WIL6210_AUTOSUSPEND_DELAY_MS);
	pm_runtime_use_autosuspend(dev);
	pm_runtime_allow(dev);
	}

	void wil_pm_runtime_forbid(struct wil6210_priv *wil)
	{
	struct device *dev = wil_to_dev(wil);

	pm_runtime_forbid(dev);
	pm_runtime_get_noresume(dev);
	}

	int wil_pm_runtime_get(struct wil6210_priv *wil)
	{
	int rc;
	struct device *dev = wil_to_dev(wil);

	rc = pm_runtime_get_sync(dev);
	if (rc < 0) {
	wil_err(wil, "pm_runtime_get_sync() failed, rc = %d\n", rc);
	pm_runtime_put_noidle(dev);
	return rc;
	}

	return 0;
	}

	void wil_pm_runtime_put(struct wil6210_priv *wil)
	{
	struct device *dev = wil_to_dev(wil);

	pm_runtime_mark_last_busy(dev);
	pm_runtime_put_autosuspend(dev);
	}