xe_gt_sysfs.c

 1// SPDX-License-Identifier: MIT
 2/*
 3 * Copyright © 2022 Intel Corporation
 4 */
 5
 6#include "xe_gt_sysfs.h"
 7
 8#include <linux/kobject.h>
 9#include <linux/sysfs.h>
10
11#include <drm/drm_managed.h>
12
13#include "xe_gt.h"
14
15static void xe_gt_sysfs_kobj_release(struct kobject *kobj)
16{
17	kfree(kobj);
18}
19
20static const struct kobj_type xe_gt_sysfs_kobj_type = {
21	.release = xe_gt_sysfs_kobj_release,
22	.sysfs_ops = &kobj_sysfs_ops,
23};
24
25static void gt_sysfs_fini(void *arg)
26{
27	struct xe_gt *gt = arg;
28
29	kobject_put(gt->sysfs);
30}
31
32int xe_gt_sysfs_init(struct xe_gt *gt)
33{
34	struct xe_tile *tile = gt_to_tile(gt);
35	struct xe_device *xe = gt_to_xe(gt);
36	struct kobj_gt *kg;
37	int err;
38
39	kg = kzalloc(sizeof(*kg), GFP_KERNEL);
40	if (!kg)
41		return -ENOMEM;
42
43	kobject_init(&kg->base, &xe_gt_sysfs_kobj_type);
44	kg->gt = gt;
45
46	err = kobject_add(&kg->base, tile->sysfs, "gt%d", gt->info.id);
47	if (err) {
48		kobject_put(&kg->base);
49		return err;
50	}
51
52	gt->sysfs = &kg->base;
53
54	return devm_add_action_or_reset(xe->drm.dev, gt_sysfs_fini, gt);
55}