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 "pxp/intel_pxp_debugfs.h"
16 #include "uc/intel_uc_debugfs.h"
17
intel_gt_debugfs_reset_show(struct intel_gt * gt,u64 * val)18 int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
19 {
20 int ret = intel_gt_terminally_wedged(gt);
21
22 switch (ret) {
23 case -EIO:
24 *val = 1;
25 return 0;
26 case 0:
27 *val = 0;
28 return 0;
29 default:
30 return ret;
31 }
32 }
33
intel_gt_debugfs_reset_store(struct intel_gt * gt,u64 val)34 void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
35 {
36 /* Flush any previous reset before applying for a new one */
37 wait_event(gt->reset.queue,
38 !test_bit(I915_RESET_BACKOFF, >->reset.flags));
39
40 intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
41 "Manually reset engine mask to %llx", val);
42 }
43
44 /*
45 * keep the interface clean where the first parameter
46 * is a 'struct intel_gt *' instead of 'void *'
47 */
__intel_gt_debugfs_reset_show(void * data,u64 * val)48 static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
49 {
50 return intel_gt_debugfs_reset_show(data, val);
51 }
52
__intel_gt_debugfs_reset_store(void * data,u64 val)53 static int __intel_gt_debugfs_reset_store(void *data, u64 val)
54 {
55 intel_gt_debugfs_reset_store(data, val);
56
57 return 0;
58 }
59
60 DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
61 __intel_gt_debugfs_reset_store, "%llu\n");
62
steering_show(struct seq_file * m,void * data)63 static int steering_show(struct seq_file *m, void *data)
64 {
65 struct drm_printer p = drm_seq_file_printer(m);
66 struct intel_gt *gt = m->private;
67
68 intel_gt_mcr_report_steering(&p, gt, true);
69
70 return 0;
71 }
72 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering);
73
gt_debugfs_register(struct intel_gt * gt,struct dentry * root)74 static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
75 {
76 static const struct intel_gt_debugfs_file files[] = {
77 { "reset", &reset_fops, NULL },
78 { "steering", &steering_fops },
79 };
80
81 intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
82 }
83
intel_gt_debugfs_register(struct intel_gt * gt)84 void intel_gt_debugfs_register(struct intel_gt *gt)
85 {
86 struct dentry *root;
87
88 if (!gt->i915->drm.primary->debugfs_root)
89 return;
90
91 root = debugfs_create_dir("gt", gt->i915->drm.primary->debugfs_root);
92 if (IS_ERR(root))
93 return;
94
95 gt_debugfs_register(gt, root);
96
97 intel_gt_engines_debugfs_register(gt, root);
98 intel_gt_pm_debugfs_register(gt, root);
99 intel_sseu_debugfs_register(gt, root);
100
101 intel_uc_debugfs_register(>->uc, root);
102 intel_pxp_debugfs_register(>->pxp, 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