linux/drivers/net/wireless/intel/iwlwifi/dvm/power.c

// SPDX-License-Identifier: GPL-2.0-only
/******************************************************************************
 *
 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
 * Copyright (C) 2019 Intel Corporation
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *****************************************************************************/


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <net/mac80211.h>
#include "iwl-io.h"
#include "iwl-debug.h"
#include "iwl-trans.h"
#include "iwl-modparams.h"
#include "dev.h"
#include "agn.h"
#include "commands.h"
#include "power.h"

static bool force_cam = …;
module_param(force_cam, bool, 0644);
MODULE_PARM_DESC(…) …;

/*
 * Setting power level allows the card to go to sleep when not busy.
 *
 * We calculate a sleep command based on the required latency, which
 * we get from mac80211. In order to handle thermal throttling, we can
 * also use pre-defined power levels.
 */

/*
 * This defines the old power levels. They are still used by default
 * (level 1) and for thermal throttle (levels 3 through 5)
 */

struct iwl_power_vec_entry { … };

#define IWL_DTIM_RANGE_0_MAX …
#define IWL_DTIM_RANGE_1_MAX …

#define NOSLP …
#define SLP …
#define ASLP …
#define ASLP_TOUT(T) …
#define TU_TO_USEC …
#define SLP_TOUT(T) …
#define SLP_VEC(X0, X1, X2, X3, X4) …
/* default power management (not Tx power) table values */
/* for DTIM period 0 through IWL_DTIM_RANGE_0_MAX */
/* DTIM 0 - 2 */
static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = …;


/* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */
/* DTIM 3 - 10 */
static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = …;

/* for DTIM period > IWL_DTIM_RANGE_1_MAX */
/* DTIM 11 - */
static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = …;

/* advance power management */
/* DTIM 0 - 2 */
static const struct iwl_power_vec_entry apm_range_0[IWL_POWER_NUM] = …;


/* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */
/* DTIM 3 - 10 */
static const struct iwl_power_vec_entry apm_range_1[IWL_POWER_NUM] = …;

/* for DTIM period > IWL_DTIM_RANGE_1_MAX */
/* DTIM 11 - */
static const struct iwl_power_vec_entry apm_range_2[IWL_POWER_NUM] = …;

static void iwl_static_sleep_cmd(struct iwl_priv *priv,
				 struct iwl_powertable_cmd *cmd,
				 enum iwl_power_level lvl, int period)
{ … }

static void iwl_power_sleep_cam_cmd(struct iwl_priv *priv,
				    struct iwl_powertable_cmd *cmd)
{ … }

static int iwl_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
{ … }

static void iwl_power_build_cmd(struct iwl_priv *priv,
				struct iwl_powertable_cmd *cmd)
{ … }

int iwl_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd,
		       bool force)
{ … }

int iwl_power_update_mode(struct iwl_priv *priv, bool force)
{ … }

/* initialize to default */
void iwl_power_initialize(struct iwl_priv *priv)
{ … }