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drm/xe: Add timeslice duration engine property to sysfs

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Timeslices between multiple context is supported via
guc scheduling. Add sysfs entry to provide user defined
timeslice duration to guc scheduling.

The timeslice duration can be adjusted per-engine class using,

/sys/class/drm/cardX/device/tileN/gtN/engines/ccs/timeslice_duration_us

V8:
  - Rebase
V7:
  - Rebase to use s/xe_engine/xe_hw_engine/ - Matt
V6:
  - Remove duration validation, not relevant - Niranjana
V5:
  - Rebase to replace hw engine with eclass interface
V4:
  - Rebase to per class engine props interface
V3:
  - Rebase
  - Update commit messge to add tile
V2:
  - Rebase

Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Tejas Upadhyay 2023-08-03 18:14:04 +05:30 committed by Rodrigo Vivi
parent e91a989ce1
commit bc3a06ead1
1 changed files with 30 additions and 0 deletions
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30
drivers/gpu/drm/xe/xe_hw_engine_class_sysfs.c
View File

@ -63,6 +63,35 @@ static ssize_t job_timeout_default(struct kobject *kobj,
static struct kobj_attribute job_timeout_def =
__ATTR(job_timeout_ms, 0444, job_timeout_default, NULL);
static ssize_t timeslice_duration_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct xe_hw_engine_class_intf *eclass = kobj_to_eclass(kobj);
u32 duration;
int err;
err = kstrtou32(buf, 0, &duration);
if (err)
return err;
WRITE_ONCE(eclass->sched_props.timeslice_us, duration);
return count;
}
static ssize_t timeslice_duration_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct xe_hw_engine_class_intf *eclass = kobj_to_eclass(kobj);
return sprintf(buf, "%u\n", eclass->sched_props.timeslice_us);
}
static struct kobj_attribute timeslice_duration_attr =
__ATTR(timeslice_duration_us, 0644, timeslice_duration_show,
timeslice_duration_store);
static ssize_t timeslice_default(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@ -95,6 +124,7 @@ static const struct attribute *defaults[] = {
static const struct attribute *files[] = {
&job_timeout_attr.attr,
&timeslice_duration_attr.attr,
NULL
};