1// SPDX-License-Identifier: MIT
2/*
3 * Copyright �� 2019 Intel Corporation
4 */
5
6#include <linux/debugfs.h>
7
8#include "i915_drv.h"
9#include "intel_gt.h"
10#include "intel_gt_debugfs.h"
11#include "intel_gt_engines_debugfs.h"
12#include "intel_gt_mcr.h"
13#include "intel_gt_pm_debugfs.h"
14#include "intel_sseu_debugfs.h"
15#include "uc/intel_uc_debugfs.h"
16
17int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
18{
19	int ret = intel_gt_terminally_wedged(gt);
20
21	switch (ret) {
22	case -EIO:
23		*val = 1;
24		return 0;
25	case 0:
26		*val = 0;
27		return 0;
28	default:
29		return ret;
30	}
31}
32
33void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
34{
35	/* Flush any previous reset before applying for a new one */
36	wait_event(gt->reset.queue,
37		   !test_bit(I915_RESET_BACKOFF, &gt->reset.flags));
38
39	intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
40			      "Manually reset engine mask to %llx", val);
41}
42
43/*
44 * keep the interface clean where the first parameter
45 * is a 'struct intel_gt *' instead of 'void *'
46 */
47static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
48{
49	return intel_gt_debugfs_reset_show(data, val);
50}
51
52static int __intel_gt_debugfs_reset_store(void *data, u64 val)
53{
54	intel_gt_debugfs_reset_store(data, val);
55
56	return 0;
57}
58
59DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
60			__intel_gt_debugfs_reset_store, "%llu\n");
61
62static int steering_show(struct seq_file *m, void *data)
63{
64	struct drm_printer p = drm_seq_file_printer(m);
65	struct intel_gt *gt = m->private;
66
67	intel_gt_mcr_report_steering(&p, gt, true);
68
69	return 0;
70}
71DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering);
72
73static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
74{
75	static const struct intel_gt_debugfs_file files[] = {
76		{ "reset", &reset_fops, NULL },
77		{ "steering", &steering_fops },
78	};
79
80	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
81}
82
83void intel_gt_debugfs_register(struct intel_gt *gt)
84{
85	struct dentry *root;
86	char gtname[4];
87
88	if (!gt->i915->drm.primary->debugfs_root)
89		return;
90
91	snprintf(gtname, sizeof(gtname), "gt%u", gt->info.id);
92	root = debugfs_create_dir(gtname, gt->i915->drm.primary->debugfs_root);
93	if (IS_ERR(root))
94		return;
95
96	gt_debugfs_register(gt, root);
97
98	intel_gt_engines_debugfs_register(gt, root);
99	intel_gt_pm_debugfs_register(gt, root);
100	intel_sseu_debugfs_register(gt, root);
101
102	intel_uc_debugfs_register(&gt->uc, root);
103}
104
105void intel_gt_debugfs_register_files(struct dentry *root,
106				     const struct intel_gt_debugfs_file *files,
107				     unsigned long count, void *data)
108{
109	while (count--) {
110		umode_t mode = files->fops->write ? 0644 : 0444;
111
112		if (!files->eval || files->eval(data))
113			debugfs_create_file(files->name,
114					    mode, root, data,
115					    files->fops);
116
117		files++;
118	}
119}
120