PRODUCT=19/0/1/0
NAME="Power Button"
PHYS="LNXPWRBN/button/input0"
PROP=0
EV=3
KEY=8000 10000000000000 0
MODALIAS=input:b0019v0000p0001e0000-e0,1,k74,8F,ramlsfw
  $   3€РЧ„]d?Цa–Я=їJJj"Tв‚Жѓq—TЕЈХ -У    3/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/* Copyright (c) 2019 Mellanox Technologies. */

#ifndef DIM_H
#define DIM_H

#include <linux/bits.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/workqueue.h>

struct net_device;

/* Number of DIM profiles and period mode. */
#define NET_DIM_PARAMS_NUM_PROFILES 5
#define NET_DIM_DEFAULT_RX_CQ_PKTS_FROM_EQE 256
#define NET_DIM_DEFAULT_TX_CQ_PKTS_FROM_EQE 128
#define NET_DIM_DEF_PROFILE_CQE 1
#define NET_DIM_DEF_PROFILE_EQE 1

/*
 * Number of events between DIM iterations.
 * Causes a moderation of the algorithm run.
 */
#define DIM_NEVENTS 64

/*
 * Is a difference between values justifies taking an action.
 * We consider 10% difference as significant.
 */
#define IS_SIGNIFICANT_DIFF(val, ref) \
	((ref) && (((100UL * abs((val) - (ref))) / (ref)) > 10))

/*
 * Calculate the gap between two values.
 * Take wrap-around and variable size into consideration.
 */
#define BIT_GAP(bits, end, start) ((((end) - (start)) + BIT_ULL(bits)) \
		& (BIT_ULL(bits) - 1))

/**
 * struct dim_cq_moder - Structure for CQ moderation values.
 * Used for communications between DIM and its consumer.
 *
 * @usec: CQ timer suggestion (by DIM)
 * @pkts: CQ packet counter suggestion (by DIM)
 * @comps: Completion counter
 * @cq_period_mode: CQ period count mode (from CQE/EQE)
 * @rcu: for asynchronous kfree_rcu
 */
struct dim_cq_moder {
	u16 usec;
	u16 pkts;
	u16 comps;
	u8 cq_period_mode;
	struct rcu_head rcu;
};

#define DIM_PROFILE_RX		BIT(0)	/* support rx profile modification */
#define DIM_PROFILE_TX		BIT(1)	/* support tx profile modification */

#define DIM_COALESCE_USEC	BIT(0)	/* support usec field modification */
#define DIM_COALESCE_PKTS	BIT(1)	/* support pkts field modification */
#define DIM_COALESCE_COMPS	BIT(2)	/* support comps field modification */

/**
 * struct dim_irq_moder - Structure for irq moderation information.
 * Used to collect irq moderation related information.
 *
 * @profile_flags: DIM_PROFILE_*
 * @coal_flags: DIM_COALESCE_* for Rx and Tx
 * @dim_rx_mode: Rx DIM period count mode: CQE or EQE
 * @dim_tx_mode: Tx DIM period count mode: CQE or EQE
 * @rx_profile: DIM profile list for Rx
 * @tx_profile: DIM profile list for Tx
 * @rx_dim_work: Rx DIM worker scheduled by net_dim()
 * @tx_dim_work: Tx DIM worker scheduled by net_dim()
 */
struct dim_irq_moder {
	u8 profile_flags;
	u8 coal_flags;
	u8 dim_rx_mode;
	u8 dim_tx_mode;
	struct dim_cq_moder __rcu *rx_profile;
	struct dim_cq_moder __rcu *tx_profile;
	void (*rx_dim_work)(struct work_struct *work);
	void (*tx_dim_work)(struct work_struct *work);
};

/**
 * struct dim_sample - Structure for DIM sample data.
 * Used for communications between DIM and its consumer.
 *
 * @time: Sample timestamp
 * @pkt_ctr: Number of packets
 * @byte_ctr: Number of bytes
 * @event_ctr: Number of events
 * @comp_ctr: Current completion counter
 */
struct dim_sample {
	ktime_t time;
	u32 pkt_ctr;
	u32 byte_ctr;
	u16 event_ctr;
	u32 comp_ctr;
};

/**
 * struct dim_stats - Structure for DIM stats.
 * Used for holding current measured rates.
 *
 * @ppms: Packets per msec
 * @bpms: Bytes per msec
 * @epms: Events per msec
 * @cpms: Completions per msec
 * @cpe_ratio: Ratio of completions to events
 */
struct dim_stats {
	int ppms; /* packets per msec */
	int bpms; /* bytes per msec */
	int epms; /* events per msec */
	int cpms; /* completions per msec */
	int cpe_ratio; /* ratio of completions to events */
};

/**
 * struct dim - Main structure for dynamic interrupt moderation (DIM).
 * Used for holding all information about a specific DIM instance.
 *
 * @state: Algorithm state (see below)
 * @prev_stats: Measured rates from previous iteration (for comparison)
 * @start_sample: Sampled data at start of current iteration
 * @measuring_sample: A &dim_sample that is used to update the cu