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// SPDX-License-Identifier: MIT
/*
* Copyright © 2022 Intel Corporation
*/
#ifndef IGT_DRM_CLIENTS_H
#define IGT_DRM_CLIENTS_H
#include <stdint.h>
#include "lib/igt_drm_fdinfo.h"
/**
* SECTION:igt_drm_clients
* @short_description: Parsing driver exposed fdinfo to track DRM clients
* @title: DRM clients parsing library
* @include: igt_drm_clients.h
*
* Some DRM drivers expose GPU usage statistics in DRM file descriptor fdinfo
* data as exposed in /proc. (As documented in kernel's
* Documentation/gpu/drm-usage-stats.rst.)
*
* This library enumerates all DRM clients by parsing that data and tracks them
* in a list of clients (struct igt_drm_clients) available for inspection
* after one or more calls to igt_drm_clients_scan.
*/
struct drm_client_fdinfo;
enum igt_drm_client_status {
IGT_DRM_CLIENT_FREE = 0, /* mbz */
IGT_DRM_CLIENT_ALIVE,
IGT_DRM_CLIENT_PROBE
};
struct igt_drm_client_engines {
unsigned int num_engines; /* Number of discovered active engines. */
unsigned int max_engine_id; /* Largest engine index discovered.
(Can differ from num_engines - 1 when using the engine map facility.) */
unsigned int *capacity; /* Array of engine capacities as parsed from fdinfo. */
char **names; /* Array of engine names, either auto-detected or from the passed in engine map. */
};
struct igt_drm_client_regions {
unsigned int num_regions; /* Number of discovered memory_regions. */
unsigned int max_region_id; /* Largest memory region index discovered.
(Can differ from num_regions - 1 when using the region map facility.) */
char **names; /* Array of region names, either auto-detected or from the passed in region map. */
};
struct igt_drm_clients;
struct igt_drm_client {
struct igt_drm_clients *clients; /* Owning list. */
enum igt_drm_client_status status;
struct igt_drm_client_regions *regions; /* Memory regions present in this client, to map with memory usage. */
struct igt_drm_client_engines *engines; /* Engines used by this client, to map with busynees data. */
unsigned long id; /* DRM client id from fdinfo. */
unsigned int drm_minor; /* DRM minor of this client. */
unsigned int pid; /* PID which has this DRM fd open. */
char pid_str[10]; /* Cached PID representation. */
char name[24]; /* Process name of the owning PID. */
char print_name[24]; /* Name without any non-printable characters. */
unsigned int samples; /* Count of times scanning updated this client. */
unsigned long total_engine_time; /* Aggregate of @utilization.agg_delta_engine_time, i.e. engine time on all engines since client start. */
unsigned long agg_delta_engine_time; /* Aggregate of @utilization.delta_engine_time, i.e. engine time on all engines since previous scan. */
struct igt_drm_client_utilization {
unsigned long delta_engine_time; /* Engine time data, relative to previous scan. */
uint64_t last_engine_time; /* Engine time data as parsed from fdinfo. */
} *utilization; /* Array of engine utilization */
struct drm_client_meminfo *memory; /* Array of region memory utilisation as parsed from fdinfo. */
};
struct igt_drm_clients {
unsigned int num_clients;
unsigned int active_clients;
int max_pid_len;
int max_name_len;
void *private_data;
struct igt_drm_client *client; /* Must be last. */
};
#define igt_for_each_drm_client(clients, c, tmp) \
for ((tmp) = (clients)->num_clients, c = (clients)->client; \
(tmp > 0); (tmp)--, (c)++)
struct igt_drm_clients *igt_drm_clients_init(void *private_data);
void igt_drm_clients_free(struct igt_drm_clients *clients);
struct igt_drm_clients *
igt_drm_clients_scan(struct igt_drm_clients *clients,
bool (*filter_client)(const struct igt_drm_clients *,
const struct drm_client_fdinfo *),
const char **name_map, unsigned int map_entries,
const char **region_map, unsigned int region_entries);
struct igt_drm_clients *
igt_drm_clients_sort(struct igt_drm_clients *clients,
int (*cmp)(const void *, const void *, void *));
#endif /* IGT_DRM_CLIENTS_H */
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