summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/i915/i915_params.c
blob: de43048543e8b514dedae10fc9e4f80155553bc6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/*
 * Copyright © 2014 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include <linux/string_helpers.h>

#include <drm/drm_print.h>

#include "i915_params.h"
#include "i915_drv.h"

DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
			"DRM_UT_CORE",
			"DRM_UT_DRIVER",
			"DRM_UT_KMS",
			"DRM_UT_PRIME",
			"DRM_UT_ATOMIC",
			"DRM_UT_VBL",
			"DRM_UT_STATE",
			"DRM_UT_LEASE",
			"DRM_UT_DP",
			"DRM_UT_DRMRES");

#define i915_param_named(name, T, perm, desc) \
	module_param_named(name, i915_modparams.name, T, perm); \
	MODULE_PARM_DESC(name, desc)
#define i915_param_named_unsafe(name, T, perm, desc) \
	module_param_named_unsafe(name, i915_modparams.name, T, perm); \
	MODULE_PARM_DESC(name, desc)

struct i915_params i915_modparams __read_mostly = {
#define MEMBER(T, member, value, ...) .member = (value),
	I915_PARAMS_FOR_EACH(MEMBER)
#undef MEMBER
};

/*
 * Note: As a rule, keep module parameter sysfs permissions read-only
 * 0400. Runtime changes are only supported through i915 debugfs.
 *
 * For any exceptions requiring write access and runtime changes through module
 * parameter sysfs, prevent debugfs file creation by setting the parameter's
 * debugfs mode to 0.
 */

i915_param_named(modeset, int, 0400,
	"Use kernel modesetting [KMS] (0=disable, "
	"1=on, -1=force vga console preference [default])");

i915_param_named_unsafe(reset, uint, 0400,
	"Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");

#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
i915_param_named(error_capture, bool, 0400,
	"Record the GPU state following a hang. "
	"This information in /sys/class/drm/card<N>/error is vital for "
	"triaging and debugging hangs.");
#endif

i915_param_named_unsafe(enable_hangcheck, bool, 0400,
	"Periodically check GPU activity for detecting hangs. "
	"WARNING: Disabling this can cause system wide hangs. "
	"(default: true)");

i915_param_named_unsafe(force_probe, charp, 0400,
	"Force probe options for specified supported devices. "
	"See CONFIG_DRM_I915_FORCE_PROBE for details.");

i915_param_named(memtest, bool, 0400,
	"Perform a read/write test of all device memory on module load (default: off)");

i915_param_named(mmio_debug, int, 0400,
	"Enable the MMIO debug code for the first N failures (default: off). "
	"This may negatively affect performance.");

i915_param_named_unsafe(enable_guc, int, 0400,
	"Enable GuC load for GuC submission and/or HuC load. "
	"Required functionality can be selected using bitmask values. "
	"(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");

i915_param_named(guc_log_level, int, 0400,
	"GuC firmware logging level. Requires GuC to be loaded. "
	"(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");

i915_param_named_unsafe(guc_firmware_path, charp, 0400,
	"GuC firmware path to use instead of the default one");

i915_param_named_unsafe(huc_firmware_path, charp, 0400,
	"HuC firmware path to use instead of the default one");

i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
	"DMC firmware path to use instead of the default one");

i915_param_named_unsafe(gsc_firmware_path, charp, 0400,
	"GSC firmware path to use instead of the default one");

#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
i915_param_named_unsafe(inject_probe_failure, uint, 0400,
	"Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
#endif

#if IS_ENABLED(CONFIG_DRM_I915_GVT)
i915_param_named(enable_gvt, bool, 0400,
	"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
#endif

#if CONFIG_DRM_I915_REQUEST_TIMEOUT
i915_param_named_unsafe(request_timeout_ms, uint, 0600,
			"Default request/fence/batch buffer expiration timeout.");
#endif

i915_param_named_unsafe(lmem_size, uint, 0400,
			"Set the lmem size(in MiB) for each region. (default: 0, all memory)");
i915_param_named_unsafe(lmem_bar_size, uint, 0400,
			"Set the lmem bar size(in MiB).");

static void _param_print_bool(struct drm_printer *p, const char *name,
			      bool val)
{
	drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val));
}

static void _param_print_int(struct drm_printer *p, const char *name,
			     int val)
{
	drm_printf(p, "i915.%s=%d\n", name, val);
}

static void _param_print_uint(struct drm_printer *p, const char *name,
			      unsigned int val)
{
	drm_printf(p, "i915.%s=%u\n", name, val);
}

static void _param_print_ulong(struct drm_printer *p, const char *name,
			       unsigned long val)
{
	drm_printf(p, "i915.%s=%lu\n", name, val);
}

static void _param_print_charp(struct drm_printer *p, const char *name,
			       const char *val)
{
	drm_printf(p, "i915.%s=%s\n", name, val);
}

#define _param_print(p, name, val)				\
	_Generic(val,						\
		 bool: _param_print_bool,			\
		 int: _param_print_int,				\
		 unsigned int: _param_print_uint,		\
		 unsigned long: _param_print_ulong,		\
		 char *: _param_print_charp)(p, name, val)

/**
 * i915_params_dump - dump i915 modparams
 * @params: i915 modparams
 * @p: the &drm_printer
 *
 * Pretty printer for i915 modparams.
 */
void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
{
#define PRINT(T, x, ...) _param_print(p, #x, params->x);
	I915_PARAMS_FOR_EACH(PRINT);
#undef PRINT
}

static void _param_dup_charp(char **valp)
{
	*valp = kstrdup(*valp, GFP_ATOMIC);
}

static void _param_nop(void *valp)
{
}

#define _param_dup(valp)				\
	_Generic(valp,					\
		 char **: _param_dup_charp,		\
		 default: _param_nop)(valp)

void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
{
	*dest = *src;
#define DUP(T, x, ...) _param_dup(&dest->x);
	I915_PARAMS_FOR_EACH(DUP);
#undef DUP
}

static void _param_free_charp(char **valp)
{
	kfree(*valp);
	*valp = NULL;
}

#define _param_free(valp)				\
	_Generic(valp,					\
		 char **: _param_free_charp,		\
		 default: _param_nop)(valp)

/* free the allocated members, *not* the passed in params itself */
void i915_params_free(struct i915_params *params)
{
#define FREE(T, x, ...) _param_free(&params->x);
	I915_PARAMS_FOR_EACH(FREE);
#undef FREE
}