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, engine_mask: val, I915_ERROR_CAPTURE,
40 fmt: "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(gt: data, val);
50}
51
52static int __intel_gt_debugfs_reset_store(void *data, u64 val)
53{
54 intel_gt_debugfs_reset_store(gt: 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(f: m);
65 struct intel_gt *gt = m->private;
66
67 intel_gt_mcr_report_steering(p: &p, gt, dump_table: 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), data: gt);
81}
82
83void intel_gt_debugfs_register(struct intel_gt *gt)
84{
85 struct dentry *debugfs_root = gt->i915->drm.debugfs_root;
86 struct dentry *root;
87 char gtname[4];
88
89 if (!debugfs_root)
90 return;
91
92 snprintf(buf: gtname, size: sizeof(gtname), fmt: "gt%u", gt->info.id);
93 root = debugfs_create_dir(name: gtname, parent: debugfs_root);
94 if (IS_ERR(ptr: root))
95 return;
96
97 gt_debugfs_register(gt, root);
98
99 intel_gt_engines_debugfs_register(gt, root);
100 intel_gt_pm_debugfs_register(gt, root);
101 intel_sseu_debugfs_register(gt, root);
102
103 intel_uc_debugfs_register(uc: &gt->uc, gt_root: root);
104}
105
106void intel_gt_debugfs_register_files(struct dentry *root,
107 const struct intel_gt_debugfs_file *files,
108 unsigned long count, void *data)
109{
110 while (count--) {
111 umode_t mode = files->fops->write ? 0644 : 0444;
112
113 if (!files->eval || files->eval(data))
114 debugfs_create_file(files->name,
115 mode, root, data,
116 files->fops);
117
118 files++;
119 }
120}
121