/*
 * Copyright (C) ST-Ericsson AB 2010
 * Author:	Sjur Brendeland
 * License terms: GNU General Public License (GPL) version 2
 */

#ifndef CFCNFG_H_
#define CFCNFG_H_
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <net/caif/caif_layer.h>
#include <net/caif/cfctrl.h>

struct cfcnfg;

/**
 * enum cfcnfg_phy_preference - Physical preference HW Abstraction
 *
 * @CFPHYPREF_UNSPECIFIED:	Default physical interface
 *
 * @CFPHYPREF_LOW_LAT:		Default physical interface for low-latency
 *				traffic
 * @CFPHYPREF_HIGH_BW:		Default physical interface for high-bandwidth
 *				traffic
 * @CFPHYPREF_LOOP:		TEST only Loopback interface simulating modem
 *				responses.
 *
 */
enum cfcnfg_phy_preference {
	CFPHYPREF_UNSPECIFIED,
	CFPHYPREF_LOW_LAT,
	CFPHYPREF_HIGH_BW,
	CFPHYPREF_LOOP
};

/**
 * cfcnfg_create() - Get the CAIF configuration object given network.
 * @net:	Network for the CAIF configuration object.
 */
struct cfcnfg *get_cfcnfg(struct net *net);

/**
 * cfcnfg_create() - Create the CAIF configuration object.
 */
struct cfcnfg *cfcnfg_create(void);

/**
 * cfcnfg_remove() -  Remove the CFCNFG object
 * @cfg: config object
 */
void cfcnfg_remove(struct cfcnfg *cfg);

/**
 * cfcnfg_add_phy_layer() - Adds a physical layer to the CAIF stack.
 * @cnfg:	Pointer to a CAIF configuration object, created by
 *		cfcnfg_create().
 * @dev:	Pointer to link layer device
 * @phy_layer:	Specify the physical layer. The transmit function
 *		MUST be set in the structure.
 * @pref:	The phy (link layer) preference.
 * @link_support: Protocol implementation for link layer specific protocol.
 * @fcs:	Specify if checksum is used in CAIF Framing Layer.
 * @head_room:	Head space needed by link specific protocol.
 */
void
cfcnfg_add_phy_layer(struct cfcnfg *cnfg,
		     struct net_device *dev, struct cflayer *phy_layer,
		     enum cfcnfg_phy_preference pref,
		     struct cflayer *link_support,
		     bool fcs, int head_room);

/**
 * cfcnfg_del_phy_layer - Deletes an phy layer from the CAIF stack.
 *
 * @cnfg:	Pointer to a CAIF configuration object, created by
 *		cfcnfg_create().
 * @phy_layer:	Adaptation layer to be removed.
 */
int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer);

/**
 * cfcnfg_set_phy_state() - Set the state of the physical interface device.
 * @cnfg:	Configuration object
 * @phy_layer:	Physical Layer representation
 * @up:	State of device
 */
int cfcnfg_set_phy_state(struct cfcnfg *cnfg, struct cflayer *phy_layer,
				bool up);

#endif				/* CFCNFG_H_ */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>dt-bindings</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/reset?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>reset</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/reset/ti-syscon.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>ti-syscon.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><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/include/dt-bindings/reset/ti-syscon.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>6e978b22efa1db9f6e71b24440b5f1d93e968ee3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/reset/ti-syscon.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>c666f7a26b860674848949e39a610222b0723f89</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/reset/ti-syscon.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include/dt-bindings/reset/ti-syscon.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/reset/ti-syscon.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/reset/ti-syscon.h?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/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>Diffstat</a> (limited to 'include/dt-bindings/reset/ti-syscon.h')</div><table summary='diffstat' class='diffstat'>