/*
 * Copyright 2006, Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/leds.h>
#include "ieee80211_i.h"

#define MAC80211_BLINK_DELAY 50 /* ms */

static inline void ieee80211_led_rx(struct ieee80211_local *local)
{
#ifdef CONFIG_MAC80211_LEDS
	unsigned long led_delay = MAC80211_BLINK_DELAY;

	if (!atomic_read(&local->rx_led_active))
		return;
	led_trigger_blink_oneshot(&local->rx_led, &led_delay, &led_delay, 0);
#endif
}

static inline void ieee80211_led_tx(struct ieee80211_local *local)
{
#ifdef CONFIG_MAC80211_LEDS
	unsigned long led_delay = MAC80211_BLINK_DELAY;

	if (!atomic_read(&local->tx_led_active))
		return;
	led_trigger_blink_oneshot(&local->tx_led, &led_delay, &led_delay, 0);
#endif
}

#ifdef CONFIG_MAC80211_LEDS
void ieee80211_led_assoc(struct ieee80211_local *local,
			 bool associated);
void ieee80211_led_radio(struct ieee80211_local *local,
			 bool enabled);
void ieee80211_alloc_led_names(struct ieee80211_local *local);
void ieee80211_free_led_names(struct ieee80211_local *local);
void ieee80211_led_init(struct ieee80211_local *local);
void ieee80211_led_exit(struct ieee80211_local *local);
void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
				unsigned int types_on, unsigned int types_off);
#else
static inline void ieee80211_led_assoc(struct ieee80211_local *local,
				       bool associated)
{
}
static inline void ieee80211_led_radio(struct ieee80211_local *local,
				       bool enabled)
{
}
static inline void ieee80211_alloc_led_names(struct ieee80211_local *local)
{
}
static inline void ieee80211_free_led_names(struct ieee80211_local *local)
{
}
static inline void ieee80211_led_init(struct ieee80211_local *local)
{
}
static inline void ieee80211_led_exit(struct ieee80211_local *local)
{
}
static inline void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
					      unsigned int types_on,
					      unsigned int types_off)
{
}
#endif

static inline void
ieee80211_tpt_led_trig_tx(struct ieee80211_local *local, __le16 fc, int bytes)
{
#ifdef CONFIG_MAC80211_LEDS
	if (ieee80211_is_data(fc) && atomic_read(&local->tpt_led_active))
		local->tpt_led_trigger->tx_bytes += bytes;
#endif
}

static inline void
ieee80211_tpt_led_trig_rx(struct ieee80211_local *local, __le16 fc, int bytes)
{
#ifdef CONFIG_MAC80211_LEDS
	if (ieee80211_is_data(fc) && atomic_read(&local->tpt_led_active))
		local->tpt_led_trigger->rx_bytes += bytes;
#endif
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>sunrpc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/cache.c?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>cache.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='6e978b22efa1db9f6e71b24440b5f1d93e968ee3'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&gt;</td><td class='right'>2017-02-03 14:18:39 -0800</td></tr>
<tr><th>committer</th><td>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2017-02-04 00:11:08 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/cache.c?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>6e978b22efa1db9f6e71b24440b5f1d93e968ee3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/sunrpc/cache.c?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>c666f7a26b860674848949e39a610222b0723f89</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sunrpc/cache.c?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>net/sunrpc/cache.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/cache.c?h=nds-private-remove&amp;id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sunrpc/cache.c?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3&amp;id2=3c223c19aea85d3dda1416c187915f4a30b04b1f'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpufreq: intel_pstate: Disable energy efficiency optimization</div><div class='commit-msg'>Some Kabylake desktop processors may not reach max turbo when running in
HWP mode, even if running under sustained 100% utilization.

This occurs when the HWP.EPP (Energy Performance Preference) is set to
"balance_power" (0x80) -- the default on most systems.

It occurs because the platform BIOS may erroneously enable an
energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not
recommended to be enabled on this SKU.

On the failing systems, this BIOS issue was not discovered when the
desktop motherboard was tested with Windows, because the BIOS also
neglects to provide the ACPI/CPPC table, that Windows requires to enable
HWP, and so Windows runs in legacy P-state mode, where this setting has
no effect.

Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and
so it runs in HWP mode, exposing this incorrect BIOS configuration.

There are several ways to address this problem.

First, Linux can also run in legacy P-state mode on this system.
As intel_pstate is how Linux enables HWP, booting with
"intel_pstate=disable"
will run in acpi-cpufreq/ondemand legacy p-state mode.

Or second, the "performance" governor can be used with intel_pstate,
which will modify HWP.EPP to 0.

Or third, starting in 4.10, the
/sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference
attribute in can be updated from "balance_power" to "performance".

Or fourth, apply this patch, which fixes the erroneous setting of
MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default
configuration to function as designed.

Signed-off-by: Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&gt;
Reviewed-by: Len Brown &lt;len.brown@intel.com&gt;
Cc: 4.6+ &lt;stable@vger.kernel.org&gt; # 4.6+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>Diffstat</a> (limited to 'net/sunrpc/cache.c')</div><table summary='diffstat' class='diffstat'>