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142 lines
3.8 KiB
142 lines
3.8 KiB
/*
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* Copyright © 2017 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <errno.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include "igt_core.h"
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#include "ioctl_wrappers.h"
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#include "i915/gem_scheduler.h"
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#define LOCAL_I915_PARAM_HAS_SCHEDULER 41
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/**
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* SECTION:gem_scheduler
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* @short_description: Helpers for querying scheduler capabilities
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* @title: GEM Scheduler
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*
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* This helper library contains functions used for getting information on
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* currently used scheduling model.
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*/
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/**
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* gem_scheduler_capability:
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* @fd: open i915 drm file descriptor
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*
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* Returns: Scheduler capability bitmap.
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*/
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unsigned gem_scheduler_capability(int fd)
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{
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static int caps = -1;
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if (caps < 0) {
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struct drm_i915_getparam gp;
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memset(&gp, 0, sizeof(gp));
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gp.param = LOCAL_I915_PARAM_HAS_SCHEDULER;
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gp.value = ∩︀
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caps = 0;
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ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp));
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errno = 0;
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}
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return caps;
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}
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/**
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* gem_scheduler_enabled:
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* @fd: open i915 drm file descriptor
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*
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* Feature test macro to query whether the driver has scheduling capability.
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*/
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bool gem_scheduler_enabled(int fd)
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{
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return gem_scheduler_capability(fd) &
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I915_SCHEDULER_CAP_ENABLED;
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}
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/**
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* gem_scheduler_has_ctx_priority:
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* @fd: open i915 drm file descriptor
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*
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* Feature test macro to query whether the driver supports assigning custom
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* priorities to contexts from userspace.
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*/
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bool gem_scheduler_has_ctx_priority(int fd)
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{
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return gem_scheduler_capability(fd) &
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I915_SCHEDULER_CAP_PRIORITY;
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}
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/**
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* gem_scheduler_has_preemption:
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* @fd: open i915 drm file descriptor
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*
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* Feature test macro to query whether the driver supports preempting active
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* (currently executing on HW) workloads.
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*/
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bool gem_scheduler_has_preemption(int fd)
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{
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return gem_scheduler_capability(fd) &
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I915_SCHEDULER_CAP_PREEMPTION;
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}
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/**
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* gem_scheduler_has_semaphores:
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* @fd: open i915 drm file descriptor
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*
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* Feature test macro to query whether the driver supports using HW semaphores
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* to schedule dependencies in parallel (using the HW to delay execution until
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* ready to reduce latency).
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*/
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bool gem_scheduler_has_semaphores(int fd)
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{
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return gem_scheduler_capability(fd) &
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I915_SCHEDULER_CAP_SEMAPHORES;
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}
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/**
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* gem_scheduler_print_capability:
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* @fd: open i915 drm file descriptor
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*
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* Helper for pretty-printing scheduler capability.
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*/
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void gem_scheduler_print_capability(int fd)
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{
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unsigned caps = gem_scheduler_capability(fd);
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if (!caps)
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return;
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igt_info("Has kernel scheduler\n");
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if (caps & I915_SCHEDULER_CAP_PRIORITY)
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igt_info(" - With priority sorting\n");
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if (caps & I915_SCHEDULER_CAP_PREEMPTION)
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igt_info(" - With preemption enabled\n");
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if (caps & I915_SCHEDULER_CAP_SEMAPHORES)
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igt_info(" - With HW semaphores enabled\n");
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}
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