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// SPDX-License-Identifier: MIT
/*
* Copyright © 2023 Intel Corporation
*/
#include <drm/drm_managed.h>
#include <linux/kobject.h>
#include <linux/sysfs.h>
#include "xe_gt.h"
#include "xe_hw_engine_class_sysfs.h"
#define MAX_ENGINE_CLASS_NAME_LEN 16
static int xe_add_hw_engine_class_defaults(struct xe_device *xe,
struct kobject *parent);
static void kobj_xe_hw_engine_release(struct kobject *kobj)
{
kfree(kobj);
}
static const struct kobj_type kobj_xe_hw_engine_type = {
.release = kobj_xe_hw_engine_release,
.sysfs_ops = &kobj_sysfs_ops
};
static void kobj_xe_hw_engine_class_fini(struct drm_device *drm, void *arg)
{
struct kobject *kobj = arg;
kobject_put(kobj);
}
static struct kobj_eclass *
kobj_xe_hw_engine_class(struct xe_device *xe, struct kobject *parent, char *name)
{
struct kobj_eclass *keclass;
int err = 0;
keclass = kzalloc(sizeof(*keclass), GFP_KERNEL);
if (!keclass)
return NULL;
kobject_init(&keclass->base, &kobj_xe_hw_engine_type);
if (kobject_add(&keclass->base, parent, "%s", name)) {
kobject_put(&keclass->base);
return NULL;
}
err = drmm_add_action_or_reset(&xe->drm, kobj_xe_hw_engine_class_fini,
&keclass->base);
if (err)
drm_warn(&xe->drm,
"%s: drmm_add_action_or_reset failed, err: %d\n",
__func__, err);
return keclass;
}
static ssize_t job_timeout_default(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct xe_hw_engine_class_intf *eclass = kobj_to_eclass(kobj->parent);
return sprintf(buf, "%u\n", eclass->defaults.job_timeout_ms);
}
static struct kobj_attribute job_timeout_def =
__ATTR(job_timeout_ms, 0444, job_timeout_default, NULL);
static ssize_t timeslice_default(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct xe_hw_engine_class_intf *eclass = kobj_to_eclass(kobj->parent);
return sprintf(buf, "%u\n", eclass->defaults.timeslice_us);
}
static struct kobj_attribute timeslice_duration_def =
__ATTR(timeslice_duration_us, 0444, timeslice_default, NULL);
static ssize_t preempt_timeout_default(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
struct xe_hw_engine_class_intf *eclass = kobj_to_eclass(kobj->parent);
return sprintf(buf, "%u\n", eclass->defaults.preempt_timeout_us);
}
static struct kobj_attribute preempt_timeout_def =
__ATTR(preempt_timeout_us, 0444, preempt_timeout_default, NULL);
static const struct attribute *defaults[] = {
&job_timeout_def.attr,
×lice_duration_def.attr,
&preempt_timeout_def.attr,
NULL
};
static void hw_engine_class_defaults_fini(struct drm_device *drm, void *arg)
{
struct kobject *kobj = arg;
sysfs_remove_files(kobj, defaults);
kobject_put(kobj);
}
static int xe_add_hw_engine_class_defaults(struct xe_device *xe,
struct kobject *parent)
{
struct kobject *kobj;
int err = 0;
kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
if (!kobj)
return -ENOMEM;
kobject_init(kobj, &kobj_xe_hw_engine_type);
err = kobject_add(kobj, parent, "%s", ".defaults");
if (err)
goto err_object;
err = sysfs_create_files(kobj, defaults);
if (err)
goto err_object;
err = drmm_add_action_or_reset(&xe->drm, hw_engine_class_defaults_fini,
kobj);
if (err)
drm_warn(&xe->drm,
"%s: drmm_add_action_or_reset failed, err: %d\n",
__func__, err);
return err;
err_object:
kobject_put(kobj);
return err;
}
static void xe_hw_engine_sysfs_kobj_release(struct kobject *kobj)
{
kfree(kobj);
}
static const struct kobj_type xe_hw_engine_sysfs_kobj_type = {
.release = xe_hw_engine_sysfs_kobj_release,
.sysfs_ops = &kobj_sysfs_ops,
};
static void hw_engine_class_sysfs_fini(struct drm_device *drm, void *arg)
{
struct kobject *kobj = arg;
kobject_put(kobj);
}
/**
* xe_hw_engine_class_sysfs_init - Init HW engine classes on GT.
* @gt: Xe GT.
*
* This routine creates sysfs for HW engine classes and adds methods
* to get/set different scheduling properties for HW engines class.
*
* Returns: Returns error value for failure and 0 for success.
*/
int xe_hw_engine_class_sysfs_init(struct xe_gt *gt)
{
struct xe_device *xe = gt_to_xe(gt);
struct xe_hw_engine *hwe;
enum xe_hw_engine_id id;
struct kobject *kobj;
u16 class_mask = 0;
int err = 0;
kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
if (!kobj)
return -ENOMEM;
kobject_init(kobj, &xe_hw_engine_sysfs_kobj_type);
err = kobject_add(kobj, gt->sysfs, "engines");
if (err)
goto err_object;
for_each_hw_engine(hwe, gt, id) {
char name[MAX_ENGINE_CLASS_NAME_LEN];
struct kobj_eclass *keclass;
if (hwe->class == XE_ENGINE_CLASS_OTHER ||
hwe->class == XE_ENGINE_CLASS_MAX)
continue;
if ((class_mask >> hwe->class) & 1)
continue;
class_mask |= 1 << hwe->class;
switch (hwe->class) {
case XE_ENGINE_CLASS_RENDER:
strcpy(name, "rcs");
break;
case XE_ENGINE_CLASS_VIDEO_DECODE:
strcpy(name, "vcs");
break;
case XE_ENGINE_CLASS_VIDEO_ENHANCE:
strcpy(name, "vecs");
break;
case XE_ENGINE_CLASS_COPY:
strcpy(name, "bcs");
break;
case XE_ENGINE_CLASS_COMPUTE:
strcpy(name, "ccs");
break;
default:
err = -EINVAL;
goto err_object;
}
keclass = kobj_xe_hw_engine_class(xe, kobj, name);
if (!keclass) {
err = -EINVAL;
goto err_object;
}
keclass->eclass = hwe->eclass;
err = xe_add_hw_engine_class_defaults(xe, &keclass->base);
if (err) {
drm_warn(&xe->drm,
"Add .defaults to engines failed!, err: %d\n",
err);
goto err_object;
}
}
err = drmm_add_action_or_reset(&xe->drm, hw_engine_class_sysfs_fini,
kobj);
if (err)
drm_warn(&xe->drm,
"%s: drmm_add_action_or_reset failed, err: %d\n",
__func__, err);
return err;
err_object:
kobject_put(kobj);
return err;
}
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