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/*
* Copyright © 2017 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include "igt_core.h"
#include "ioctl_wrappers.h"
#include "i915/gem_scheduler.h"
#define LOCAL_I915_PARAM_HAS_SCHEDULER 41
/**
* SECTION:gem_scheduler
* @short_description: Helpers for querying scheduler capabilities
* @title: GEM Scheduler
*
* This helper library contains functions used for getting information on
* currently used scheduling model.
*/
/**
* gem_scheduler_capability:
* @fd: open i915 drm file descriptor
*
* Returns: Scheduler capability bitmap.
*/
unsigned gem_scheduler_capability(int fd)
{
static int caps = -1;
if (caps < 0) {
struct drm_i915_getparam gp;
memset(&gp, 0, sizeof(gp));
gp.param = LOCAL_I915_PARAM_HAS_SCHEDULER;
gp.value = ∩︀
caps = 0;
ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp));
errno = 0;
}
return caps;
}
/**
* gem_has_scheduler:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver has scheduling capability.
*/
bool gem_scheduler_enabled(int fd)
{
return gem_scheduler_capability(fd) &
LOCAL_I915_SCHEDULER_CAP_ENABLED;
}
/**
* gem_has_ctx_priority:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports assigning custom
* priorities to contexts from userspace.
*/
bool gem_scheduler_has_ctx_priority(int fd)
{
return gem_scheduler_capability(fd) &
LOCAL_I915_SCHEDULER_CAP_PRIORITY;
}
/**
* gem_has_preemption:
* @fd: open i915 drm file descriptor
*
* Feature test macro to query whether the driver supports preempting active
* (currently executing on HW) workloads.
*/
bool gem_scheduler_has_preemption(int fd)
{
return gem_scheduler_capability(fd) &
LOCAL_I915_SCHEDULER_CAP_PREEMPTION;
}
/**
* gem_scheduler_print_capability:
* @fd: open i915 drm file descriptor
*
* Helper for pretty-printing scheduler capability.
*/
void gem_scheduler_print_capability(int fd)
{
unsigned caps = gem_scheduler_capability(fd);
if (!caps)
return;
igt_info("Has kernel scheduler\n");
if (caps & LOCAL_I915_SCHEDULER_CAP_PRIORITY)
igt_info(" - With priority sorting\n");
if (caps & LOCAL_I915_SCHEDULER_CAP_PREEMPTION)
igt_info(" - With preemption enabled\n");
}
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