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DIM: fix dim.h kernel-doc and headers

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Lots of fixes to kernel-doc in structs, enums, and functions.
Also add header files that are being used but not yet #included.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Yamin Friedman <yaminf@mellanox.com>
Cc: Tal Gilboa <talgi@mellanox.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: linux-rdma@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
This commit is contained in:
Randy Dunlap 2019-10-08 21:03:14 -07:00 committed by Jakub Kicinski
parent b2d8c273ed
commit 690a6ca7df
1 changed files with 33 additions and 30 deletions
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63
include/linux/dim.h
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@ -4,22 +4,26 @@
#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>
/**
/*
* 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) \
(((100UL * abs((val) - (ref))) / (ref)) > 10)
/**
/*
* Calculate the gap between two values.
* Take wrap-around and variable size into consideration.
*/
@ -27,12 +31,13 @@
& (BIT_ULL(bits) - 1))
/**
* Structure for CQ moderation values.
* 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)
* @cq_period_mode: CQ priod count mode (from CQE/EQE)
* @comps: Completion counter
* @cq_period_mode: CQ period count mode (from CQE/EQE)
*/
struct dim_cq_moder {
u16 usec;
@ -42,13 +47,14 @@ struct dim_cq_moder {
};
/**
* Structure for DIM sample data.
* 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;
@ -59,12 +65,14 @@ struct dim_sample {
};
/**
* Structure for DIM stats.
* 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 */
@ -75,12 +83,13 @@ struct dim_stats {
};
/**
* Main structure for dynamic interrupt moderation (DIM).
* 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 current events
* @work: Work to perform on action required
* @priv: A pointer to the struct that points to dim
* @profile_ix: Current moderation profile
@ -106,24 +115,21 @@ struct dim {
};
/**
* enum dim_cq_period_mode
*
* These are the modes for CQ period count.
* enum dim_cq_period_mode - Modes for CQ period count
*
* @DIM_CQ_PERIOD_MODE_START_FROM_EQE: Start counting from EQE
* @DIM_CQ_PERIOD_MODE_START_FROM_CQE: Start counting from CQE (implies timer reset)
* @DIM_CQ_PERIOD_NUM_MODES: Number of modes
*/
enum {
enum dim_cq_period_mode {
DIM_CQ_PERIOD_MODE_START_FROM_EQE = 0x0,
DIM_CQ_PERIOD_MODE_START_FROM_CQE = 0x1,
DIM_CQ_PERIOD_NUM_MODES
};
/**
* enum dim_state
* enum dim_state - DIM algorithm states
*
* These are the DIM algorithm states.
* These will determine if the algorithm is in a valid state to start an iteration.
*
* @DIM_START_MEASURE: This is the first iteration (also after applying a new profile)
@ -131,16 +137,15 @@ enum {
* need to perform an action
* @DIM_APPLY_NEW_PROFILE: DIM consumer is currently applying a profile - no need to measure
*/
enum {
enum dim_state {
DIM_START_MEASURE,
DIM_MEASURE_IN_PROGRESS,
DIM_APPLY_NEW_PROFILE,
};
/**
* enum dim_tune_state
* enum dim_tune_state - DIM algorithm tune states
*
* These are the DIM algorithm tune states.
* These will determine which action the algorithm should perform.
*
* @DIM_PARKING_ON_TOP: Algorithm found a local top point - exit on significant difference
@ -148,7 +153,7 @@ enum {
* @DIM_GOING_RIGHT: Algorithm is currently trying higher moderation levels
* @DIM_GOING_LEFT: Algorithm is currently trying lower moderation levels
*/
enum {
enum dim_tune_state {
DIM_PARKING_ON_TOP,
DIM_PARKING_TIRED,
DIM_GOING_RIGHT,
@ -156,25 +161,23 @@ enum {
};
/**
* enum dim_stats_state
* enum dim_stats_state - DIM algorithm statistics states
*
* These are the DIM algorithm statistics states.
* These will determine the verdict of current iteration.
*
* @DIM_STATS_WORSE: Current iteration shows worse performance than before
* @DIM_STATS_WORSE: Current iteration shows same performance than before
* @DIM_STATS_WORSE: Current iteration shows better performance than before
* @DIM_STATS_SAME: Current iteration shows same performance than before
* @DIM_STATS_BETTER: Current iteration shows better performance than before
*/
enum {
enum dim_stats_state {
DIM_STATS_WORSE,
DIM_STATS_SAME,
DIM_STATS_BETTER,
};
/**
* enum dim_step_result
* enum dim_step_result - DIM algorithm step results
*
* These are the DIM algorithm step results.
* These describe the result of a step.
*
* @DIM_STEPPED: Performed a regular step
@ -182,7 +185,7 @@ enum {
* tired parking
* @DIM_ON_EDGE: Stepped to the most left/right profile
*/
enum {
enum dim_step_result {
DIM_STEPPED,
DIM_TOO_TIRED,
DIM_ON_EDGE,
@ -199,7 +202,7 @@ enum {
bool dim_on_top(struct dim *dim);
/**
* dim_turn - change profile alterning direction
* dim_turn - change profile altering direction
* @dim: DIM context
*
* Go left if we were going right and vice-versa.
@ -238,7 +241,7 @@ void dim_calc_stats(struct dim_sample *start, struct dim_sample *end,
struct dim_stats *curr_stats);
/**
* dim_update_sample - set a sample's fields with give values
* dim_update_sample - set a sample's fields with given values
* @event_ctr: number of events to set
* @packets: number of packets to set
* @bytes: number of bytes to set
@ -304,8 +307,8 @@ struct dim_cq_moder net_dim_get_def_tx_moderation(u8 cq_period_mode);
* @end_sample: Current data measurement
*
* Called by the consumer.
* This is the main logic of the algorithm, where data is processed in order to decide on next
* required action.
* This is the main logic of the algorithm, where data is processed in order
* to decide on next required action.
*/
void net_dim(struct dim *dim, struct dim_sample end_sample);