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
intel_gt_debugfs_reset_show(struct intel_gt * gt,u64 * val)17 int 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
intel_gt_debugfs_reset_store(struct intel_gt * gt,u64 val)33 void 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, >->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 */
__intel_gt_debugfs_reset_show(void * data,u64 * val)47 static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
48 {
49 return intel_gt_debugfs_reset_show(data, val);
50 }
51
__intel_gt_debugfs_reset_store(void * data,u64 val)52 static 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
59 DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
60 __intel_gt_debugfs_reset_store, "%llu\n");
61
steering_show(struct seq_file * m,void * data)62 static 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 }
71 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering);
72
gt_debugfs_register(struct intel_gt * gt,struct dentry * root)73 static 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
intel_gt_debugfs_register(struct intel_gt * gt)83 void 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(>->uc, root);
103 }
104
intel_gt_debugfs_register_files(struct dentry * root,const struct intel_gt_debugfs_file * files,unsigned long count,void * data)105 void 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