Loading...
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2019 Intel Corporation
4 */
5
6#include <linux/kernel.h>
7
8#include "i915_debugfs_params.h"
9#include "gt/intel_gt.h"
10#include "gt/uc/intel_guc.h"
11#include "i915_drv.h"
12#include "i915_params.h"
13
14#define MATCH_DEBUGFS_NODE_NAME(_file, _name) \
15 (strcmp((_file)->f_path.dentry->d_name.name, (_name)) == 0)
16
17#define GET_I915(i915, name, ptr) \
18 do { \
19 struct i915_params *params; \
20 params = container_of(((void *)(ptr)), typeof(*params), name); \
21 (i915) = container_of(params, typeof(*(i915)), params); \
22 } while (0)
23
24/* int param */
25static int i915_param_int_show(struct seq_file *m, void *data)
26{
27 int *value = m->private;
28
29 seq_printf(m, "%d\n", *value);
30
31 return 0;
32}
33
34static int i915_param_int_open(struct inode *inode, struct file *file)
35{
36 return single_open(file, i915_param_int_show, inode->i_private);
37}
38
39static int notify_guc(struct drm_i915_private *i915)
40{
41 int ret = 0;
42
43 if (intel_uc_uses_guc_submission(&to_gt(i915)->uc))
44 ret = intel_guc_global_policies_update(&to_gt(i915)->uc.guc);
45
46 return ret;
47}
48
49static ssize_t i915_param_int_write(struct file *file,
50 const char __user *ubuf, size_t len,
51 loff_t *offp)
52{
53 struct seq_file *m = file->private_data;
54 int *value = m->private;
55 int ret;
56
57 ret = kstrtoint_from_user(ubuf, len, 0, value);
58 if (ret) {
59 /* support boolean values too */
60 bool b;
61
62 ret = kstrtobool_from_user(ubuf, len, &b);
63 if (!ret)
64 *value = b;
65 }
66
67 return ret ?: len;
68}
69
70static const struct file_operations i915_param_int_fops = {
71 .owner = THIS_MODULE,
72 .open = i915_param_int_open,
73 .read = seq_read,
74 .write = i915_param_int_write,
75 .llseek = default_llseek,
76 .release = single_release,
77};
78
79static const struct file_operations i915_param_int_fops_ro = {
80 .owner = THIS_MODULE,
81 .open = i915_param_int_open,
82 .read = seq_read,
83 .llseek = default_llseek,
84 .release = single_release,
85};
86
87/* unsigned int param */
88static int i915_param_uint_show(struct seq_file *m, void *data)
89{
90 unsigned int *value = m->private;
91
92 seq_printf(m, "%u\n", *value);
93
94 return 0;
95}
96
97static int i915_param_uint_open(struct inode *inode, struct file *file)
98{
99 return single_open(file, i915_param_uint_show, inode->i_private);
100}
101
102static ssize_t i915_param_uint_write(struct file *file,
103 const char __user *ubuf, size_t len,
104 loff_t *offp)
105{
106 struct drm_i915_private *i915;
107 struct seq_file *m = file->private_data;
108 unsigned int *value = m->private;
109 unsigned int old = *value;
110 int ret;
111
112 ret = kstrtouint_from_user(ubuf, len, 0, value);
113 if (ret) {
114 /* support boolean values too */
115 bool b;
116
117 ret = kstrtobool_from_user(ubuf, len, &b);
118 if (!ret)
119 *value = b;
120 }
121
122 if (!ret && MATCH_DEBUGFS_NODE_NAME(file, "reset")) {
123 GET_I915(i915, reset, value);
124
125 ret = notify_guc(i915);
126 if (ret)
127 *value = old;
128 }
129
130 return ret ?: len;
131}
132
133static const struct file_operations i915_param_uint_fops = {
134 .owner = THIS_MODULE,
135 .open = i915_param_uint_open,
136 .read = seq_read,
137 .write = i915_param_uint_write,
138 .llseek = default_llseek,
139 .release = single_release,
140};
141
142static const struct file_operations i915_param_uint_fops_ro = {
143 .owner = THIS_MODULE,
144 .open = i915_param_uint_open,
145 .read = seq_read,
146 .llseek = default_llseek,
147 .release = single_release,
148};
149
150/* char * param */
151static int i915_param_charp_show(struct seq_file *m, void *data)
152{
153 const char **s = m->private;
154
155 seq_printf(m, "%s\n", *s);
156
157 return 0;
158}
159
160static int i915_param_charp_open(struct inode *inode, struct file *file)
161{
162 return single_open(file, i915_param_charp_show, inode->i_private);
163}
164
165static ssize_t i915_param_charp_write(struct file *file,
166 const char __user *ubuf, size_t len,
167 loff_t *offp)
168{
169 struct seq_file *m = file->private_data;
170 char **s = m->private;
171 char *new, *old;
172
173 old = *s;
174 new = strndup_user(ubuf, PAGE_SIZE);
175 if (IS_ERR(new)) {
176 len = PTR_ERR(new);
177 goto out;
178 }
179
180 *s = new;
181
182 kfree(old);
183out:
184 return len;
185}
186
187static const struct file_operations i915_param_charp_fops = {
188 .owner = THIS_MODULE,
189 .open = i915_param_charp_open,
190 .read = seq_read,
191 .write = i915_param_charp_write,
192 .llseek = default_llseek,
193 .release = single_release,
194};
195
196static const struct file_operations i915_param_charp_fops_ro = {
197 .owner = THIS_MODULE,
198 .open = i915_param_charp_open,
199 .read = seq_read,
200 .llseek = default_llseek,
201 .release = single_release,
202};
203
204#define RO(mode) (((mode) & 0222) == 0)
205
206static struct dentry *
207i915_debugfs_create_int(const char *name, umode_t mode,
208 struct dentry *parent, int *value)
209{
210 return debugfs_create_file_unsafe(name, mode, parent, value,
211 RO(mode) ? &i915_param_int_fops_ro :
212 &i915_param_int_fops);
213}
214
215static struct dentry *
216i915_debugfs_create_uint(const char *name, umode_t mode,
217 struct dentry *parent, unsigned int *value)
218{
219 return debugfs_create_file_unsafe(name, mode, parent, value,
220 RO(mode) ? &i915_param_uint_fops_ro :
221 &i915_param_uint_fops);
222}
223
224static struct dentry *
225i915_debugfs_create_charp(const char *name, umode_t mode,
226 struct dentry *parent, char **value)
227{
228 return debugfs_create_file(name, mode, parent, value,
229 RO(mode) ? &i915_param_charp_fops_ro :
230 &i915_param_charp_fops);
231}
232
233static __always_inline void
234_i915_param_create_file(struct dentry *parent, const char *name,
235 const char *type, int mode, void *value)
236{
237 if (!mode)
238 return;
239
240 if (!__builtin_strcmp(type, "bool"))
241 debugfs_create_bool(name, mode, parent, value);
242 else if (!__builtin_strcmp(type, "int"))
243 i915_debugfs_create_int(name, mode, parent, value);
244 else if (!__builtin_strcmp(type, "unsigned int"))
245 i915_debugfs_create_uint(name, mode, parent, value);
246 else if (!__builtin_strcmp(type, "unsigned long"))
247 debugfs_create_ulong(name, mode, parent, value);
248 else if (!__builtin_strcmp(type, "char *"))
249 i915_debugfs_create_charp(name, mode, parent, value);
250 else
251 WARN(1, "no debugfs fops defined for param type %s (i915.%s)\n",
252 type, name);
253}
254
255/* add a subdirectory with files for each i915 param */
256struct dentry *i915_debugfs_params(struct drm_i915_private *i915)
257{
258 struct drm_minor *minor = i915->drm.primary;
259 struct i915_params *params = &i915->params;
260 struct dentry *dir;
261
262 dir = debugfs_create_dir("i915_params", minor->debugfs_root);
263 if (IS_ERR(dir))
264 return dir;
265
266 /*
267 * Note: We could create files for params needing special handling
268 * here. Set mode in params to 0 to skip the generic create file, or
269 * just let the generic create file fail silently with -EEXIST.
270 */
271
272#define REGISTER(T, x, unused, mode, ...) _i915_param_create_file(dir, #x, #T, mode, ¶ms->x);
273 I915_PARAMS_FOR_EACH(REGISTER);
274#undef REGISTER
275
276 return dir;
277}
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2019 Intel Corporation
4 */
5
6#include <linux/kernel.h>
7#include <linux/debugfs.h>
8
9#include "i915_debugfs_params.h"
10#include "gt/intel_gt.h"
11#include "gt/uc/intel_guc.h"
12#include "i915_drv.h"
13#include "i915_params.h"
14
15#define MATCH_DEBUGFS_NODE_NAME(_file, _name) \
16 (strcmp((_file)->f_path.dentry->d_name.name, (_name)) == 0)
17
18#define GET_I915(i915, name, ptr) \
19 do { \
20 struct i915_params *params; \
21 params = container_of(((void *)(ptr)), typeof(*params), name); \
22 (i915) = container_of(params, typeof(*(i915)), params); \
23 } while (0)
24
25/* int param */
26static int i915_param_int_show(struct seq_file *m, void *data)
27{
28 int *value = m->private;
29
30 seq_printf(m, "%d\n", *value);
31
32 return 0;
33}
34
35static int i915_param_int_open(struct inode *inode, struct file *file)
36{
37 return single_open(file, i915_param_int_show, inode->i_private);
38}
39
40static int notify_guc(struct drm_i915_private *i915)
41{
42 struct intel_gt *gt;
43 int i, ret = 0;
44
45 for_each_gt(gt, i915, i) {
46 if (intel_uc_uses_guc_submission(>->uc))
47 ret = intel_guc_global_policies_update(>->uc.guc);
48 }
49
50 return ret;
51}
52
53static ssize_t i915_param_int_write(struct file *file,
54 const char __user *ubuf, size_t len,
55 loff_t *offp)
56{
57 struct seq_file *m = file->private_data;
58 int *value = m->private;
59 int ret;
60
61 ret = kstrtoint_from_user(ubuf, len, 0, value);
62 if (ret) {
63 /* support boolean values too */
64 bool b;
65
66 ret = kstrtobool_from_user(ubuf, len, &b);
67 if (!ret)
68 *value = b;
69 }
70
71 return ret ?: len;
72}
73
74static const struct file_operations i915_param_int_fops = {
75 .owner = THIS_MODULE,
76 .open = i915_param_int_open,
77 .read = seq_read,
78 .write = i915_param_int_write,
79 .llseek = default_llseek,
80 .release = single_release,
81};
82
83static const struct file_operations i915_param_int_fops_ro = {
84 .owner = THIS_MODULE,
85 .open = i915_param_int_open,
86 .read = seq_read,
87 .llseek = default_llseek,
88 .release = single_release,
89};
90
91/* unsigned int param */
92static int i915_param_uint_show(struct seq_file *m, void *data)
93{
94 unsigned int *value = m->private;
95
96 seq_printf(m, "%u\n", *value);
97
98 return 0;
99}
100
101static int i915_param_uint_open(struct inode *inode, struct file *file)
102{
103 return single_open(file, i915_param_uint_show, inode->i_private);
104}
105
106static ssize_t i915_param_uint_write(struct file *file,
107 const char __user *ubuf, size_t len,
108 loff_t *offp)
109{
110 struct drm_i915_private *i915;
111 struct seq_file *m = file->private_data;
112 unsigned int *value = m->private;
113 unsigned int old = *value;
114 int ret;
115
116 ret = kstrtouint_from_user(ubuf, len, 0, value);
117 if (ret) {
118 /* support boolean values too */
119 bool b;
120
121 ret = kstrtobool_from_user(ubuf, len, &b);
122 if (!ret)
123 *value = b;
124 }
125
126 if (!ret && MATCH_DEBUGFS_NODE_NAME(file, "reset")) {
127 GET_I915(i915, reset, value);
128
129 ret = notify_guc(i915);
130 if (ret)
131 *value = old;
132 }
133
134 return ret ?: len;
135}
136
137static const struct file_operations i915_param_uint_fops = {
138 .owner = THIS_MODULE,
139 .open = i915_param_uint_open,
140 .read = seq_read,
141 .write = i915_param_uint_write,
142 .llseek = default_llseek,
143 .release = single_release,
144};
145
146static const struct file_operations i915_param_uint_fops_ro = {
147 .owner = THIS_MODULE,
148 .open = i915_param_uint_open,
149 .read = seq_read,
150 .llseek = default_llseek,
151 .release = single_release,
152};
153
154/* char * param */
155static int i915_param_charp_show(struct seq_file *m, void *data)
156{
157 const char **s = m->private;
158
159 seq_printf(m, "%s\n", *s);
160
161 return 0;
162}
163
164static int i915_param_charp_open(struct inode *inode, struct file *file)
165{
166 return single_open(file, i915_param_charp_show, inode->i_private);
167}
168
169static ssize_t i915_param_charp_write(struct file *file,
170 const char __user *ubuf, size_t len,
171 loff_t *offp)
172{
173 struct seq_file *m = file->private_data;
174 char **s = m->private;
175 char *new, *old;
176
177 old = *s;
178 new = strndup_user(ubuf, PAGE_SIZE);
179 if (IS_ERR(new)) {
180 len = PTR_ERR(new);
181 goto out;
182 }
183
184 *s = new;
185
186 kfree(old);
187out:
188 return len;
189}
190
191static const struct file_operations i915_param_charp_fops = {
192 .owner = THIS_MODULE,
193 .open = i915_param_charp_open,
194 .read = seq_read,
195 .write = i915_param_charp_write,
196 .llseek = default_llseek,
197 .release = single_release,
198};
199
200static const struct file_operations i915_param_charp_fops_ro = {
201 .owner = THIS_MODULE,
202 .open = i915_param_charp_open,
203 .read = seq_read,
204 .llseek = default_llseek,
205 .release = single_release,
206};
207
208#define RO(mode) (((mode) & 0222) == 0)
209
210static struct dentry *
211i915_debugfs_create_int(const char *name, umode_t mode,
212 struct dentry *parent, int *value)
213{
214 return debugfs_create_file_unsafe(name, mode, parent, value,
215 RO(mode) ? &i915_param_int_fops_ro :
216 &i915_param_int_fops);
217}
218
219static struct dentry *
220i915_debugfs_create_uint(const char *name, umode_t mode,
221 struct dentry *parent, unsigned int *value)
222{
223 return debugfs_create_file_unsafe(name, mode, parent, value,
224 RO(mode) ? &i915_param_uint_fops_ro :
225 &i915_param_uint_fops);
226}
227
228static struct dentry *
229i915_debugfs_create_charp(const char *name, umode_t mode,
230 struct dentry *parent, char **value)
231{
232 return debugfs_create_file(name, mode, parent, value,
233 RO(mode) ? &i915_param_charp_fops_ro :
234 &i915_param_charp_fops);
235}
236
237#define _i915_param_create_file(parent, name, mode, valp) \
238 do { \
239 if (mode) \
240 _Generic(valp, \
241 bool *: debugfs_create_bool, \
242 int *: i915_debugfs_create_int, \
243 unsigned int *: i915_debugfs_create_uint, \
244 unsigned long *: debugfs_create_ulong, \
245 char **: i915_debugfs_create_charp)(name, mode, parent, valp); \
246 } while(0)
247
248/* add a subdirectory with files for each i915 param */
249struct dentry *i915_debugfs_params(struct drm_i915_private *i915)
250{
251 struct drm_minor *minor = i915->drm.primary;
252 struct i915_params *params = &i915->params;
253 struct dentry *dir;
254
255 dir = debugfs_create_dir("i915_params", minor->debugfs_root);
256 if (IS_ERR(dir))
257 return dir;
258
259 /*
260 * Note: We could create files for params needing special handling
261 * here. Set mode in params to 0 to skip the generic create file, or
262 * just let the generic create file fail silently with -EEXIST.
263 */
264
265#define REGISTER(T, x, unused, mode, ...) _i915_param_create_file(dir, #x, mode, ¶ms->x);
266 I915_PARAMS_FOR_EACH(REGISTER);
267#undef REGISTER
268
269 return dir;
270}