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_debugfs.h"
10 #include "intel_gt_engines_debugfs.h"
11 #include "intel_gt_pm_debugfs.h"
12 #include "intel_sseu_debugfs.h"
13 #include "pxp/intel_pxp_debugfs.h"
14 #include "uc/intel_uc_debugfs.h"
15
intel_gt_debugfs_reset_show(struct intel_gt * gt,u64 * val)16 int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
17 {
18 int ret = intel_gt_terminally_wedged(gt);
19
20 switch (ret) {
21 case -EIO:
22 *val = 1;
23 return 0;
24 case 0:
25 *val = 0;
26 return 0;
27 default:
28 return ret;
29 }
30 }
31
intel_gt_debugfs_reset_store(struct intel_gt * gt,u64 val)32 int intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
33 {
34 /* Flush any previous reset before applying for a new one */
35 wait_event(gt->reset.queue,
36 !test_bit(I915_RESET_BACKOFF, >->reset.flags));
37
38 intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
39 "Manually reset engine mask to %llx", val);
40 return 0;
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 return intel_gt_debugfs_reset_store(data, val);
55 }
56
57 DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
58 __intel_gt_debugfs_reset_store, "%llu\n");
59
gt_debugfs_register(struct intel_gt * gt,struct dentry * root)60 static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
61 {
62 static const struct intel_gt_debugfs_file files[] = {
63 { "reset", &reset_fops, NULL },
64 };
65
66 intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
67 }
68
intel_gt_debugfs_register(struct intel_gt * gt)69 void intel_gt_debugfs_register(struct intel_gt *gt)
70 {
71 struct dentry *root;
72
73 if (!gt->i915->drm.primary->debugfs_root)
74 return;
75
76 root = debugfs_create_dir("gt", gt->i915->drm.primary->debugfs_root);
77 if (IS_ERR(root))
78 return;
79
80 gt_debugfs_register(gt, root);
81
82 intel_gt_engines_debugfs_register(gt, root);
83 intel_gt_pm_debugfs_register(gt, root);
84 intel_sseu_debugfs_register(gt, root);
85
86 intel_uc_debugfs_register(>->uc, root);
87 intel_pxp_debugfs_register(>->pxp, root);
88 }
89
intel_gt_debugfs_register_files(struct dentry * root,const struct intel_gt_debugfs_file * files,unsigned long count,void * data)90 void intel_gt_debugfs_register_files(struct dentry *root,
91 const struct intel_gt_debugfs_file *files,
92 unsigned long count, void *data)
93 {
94 while (count--) {
95 umode_t mode = files->fops->write ? 0644 : 0444;
96
97 if (!files->eval || files->eval(data))
98 debugfs_create_file(files->name,
99 mode, root, data,
100 files->fops);
101
102 files++;
103 }
104 }
105