tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright © 2014 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
14 * of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#include <linux/string_helpers.h>
26
27#include <drm/drm_print.h>
28
29#include "i915_params.h"
30#include "i915_drv.h"
31
32DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
33 "DRM_UT_CORE",
34 "DRM_UT_DRIVER",
35 "DRM_UT_KMS",
36 "DRM_UT_PRIME",
37 "DRM_UT_ATOMIC",
38 "DRM_UT_VBL",
39 "DRM_UT_STATE",
40 "DRM_UT_LEASE",
41 "DRM_UT_DP",
42 "DRM_UT_DRMRES");
43
44#define i915_param_named(name, T, perm, desc) \
45 module_param_named(name, i915_modparams.name, T, perm); \
46 MODULE_PARM_DESC(name, desc)
47#define i915_param_named_unsafe(name, T, perm, desc) \
48 module_param_named_unsafe(name, i915_modparams.name, T, perm); \
49 MODULE_PARM_DESC(name, desc)
50
51struct i915_params i915_modparams __read_mostly = {
52#define MEMBER(T, member, value, ...) .member = (value),
53 I915_PARAMS_FOR_EACH(MEMBER)
54#undef MEMBER
55};
56
57/*
58 * Note: As a rule, keep module parameter sysfs permissions read-only
59 * 0400. Runtime changes are only supported through i915 debugfs.
60 *
61 * For any exceptions requiring write access and runtime changes through module
62 * parameter sysfs, prevent debugfs file creation by setting the parameter's
63 * debugfs mode to 0.
64 */
65
66i915_param_named(modeset, int, 0400,
67 "Use kernel modesetting [KMS] (0=disable, "
68 "1=on, -1=force vga console preference [default])");
69
70i915_param_named_unsafe(reset, uint, 0400,
71 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
72
73#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
74i915_param_named(error_capture, bool, 0400,
75 "Record the GPU state following a hang. "
76 "This information in /sys/class/drm/card<N>/error is vital for "
77 "triaging and debugging hangs.");
78#endif
79
80i915_param_named_unsafe(enable_hangcheck, bool, 0400,
81 "Periodically check GPU activity for detecting hangs. "
82 "WARNING: Disabling this can cause system wide hangs. "
83 "(default: true)");
84
85i915_param_named_unsafe(force_probe, charp, 0400,
86 "Force probe options for specified supported devices. "
87 "See CONFIG_DRM_I915_FORCE_PROBE for details.");
88
89i915_param_named(memtest, bool, 0400,
90 "Perform a read/write test of all device memory on module load (default: off)");
91
92i915_param_named(mmio_debug, int, 0400,
93 "Enable the MMIO debug code for the first N failures (default: off). "
94 "This may negatively affect performance.");
95
96i915_param_named_unsafe(enable_guc, int, 0400,
97 "Enable GuC load for GuC submission and/or HuC load. "
98 "Required functionality can be selected using bitmask values. "
99 "(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");
100
101i915_param_named(guc_log_level, int, 0400,
102 "GuC firmware logging level. Requires GuC to be loaded. "
103 "(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");
104
105i915_param_named_unsafe(guc_firmware_path, charp, 0400,
106 "GuC firmware path to use instead of the default one");
107
108i915_param_named_unsafe(huc_firmware_path, charp, 0400,
109 "HuC firmware path to use instead of the default one");
110
111i915_param_named_unsafe(gsc_firmware_path, charp, 0400,
112 "GSC firmware path to use instead of the default one");
113
114#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
115i915_param_named_unsafe(inject_probe_failure, uint, 0400,
116 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
117#endif
118
119#if IS_ENABLED(CONFIG_DRM_I915_GVT)
120i915_param_named(enable_gvt, bool, 0400,
121 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");
122#endif
123
124#if CONFIG_DRM_I915_REQUEST_TIMEOUT
125i915_param_named_unsafe(request_timeout_ms, uint, 0600,
126 "Default request/fence/batch buffer expiration timeout.");
127#endif
128
129i915_param_named_unsafe(lmem_size, uint, 0400,
130 "Set the lmem size(in MiB) for each region. (default: 0, all memory)");
131i915_param_named_unsafe(lmem_bar_size, uint, 0400,
132 "Set the lmem bar size(in MiB).");
133
134#if IS_ENABLED(CONFIG_DRM_I915_REPLAY_GPU_HANGS_API)
135i915_param_named(enable_debug_only_api, bool, 0400,
136 "Enable support for unstable debug only userspace API. (default:false)");
137#endif
138
139static void _param_print_bool(struct drm_printer *p, const char *name,
140 bool val)
141{
142 drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val));
143}
144
145static void _param_print_int(struct drm_printer *p, const char *name,
146 int val)
147{
148 drm_printf(p, "i915.%s=%d\n", name, val);
149}
150
151static void _param_print_uint(struct drm_printer *p, const char *name,
152 unsigned int val)
153{
154 drm_printf(p, "i915.%s=%u\n", name, val);
155}
156
157static void _param_print_ulong(struct drm_printer *p, const char *name,
158 unsigned long val)
159{
160 drm_printf(p, "i915.%s=%lu\n", name, val);
161}
162
163static void _param_print_charp(struct drm_printer *p, const char *name,
164 const char *val)
165{
166 drm_printf(p, "i915.%s=%s\n", name, val);
167}
168
169#define _param_print(p, name, val) \
170 _Generic(val, \
171 bool: _param_print_bool, \
172 int: _param_print_int, \
173 unsigned int: _param_print_uint, \
174 unsigned long: _param_print_ulong, \
175 char *: _param_print_charp)(p, name, val)
176
177/**
178 * i915_params_dump - dump i915 modparams
179 * @params: i915 modparams
180 * @p: the &drm_printer
181 *
182 * Pretty printer for i915 modparams.
183 */
184void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
185{
186#define PRINT(T, x, ...) _param_print(p, #x, params->x);
187 I915_PARAMS_FOR_EACH(PRINT);
188#undef PRINT
189}
190
191static void _param_dup_charp(char **valp)
192{
193 *valp = kstrdup(*valp, GFP_ATOMIC);
194}
195
196static void _param_nop(void *valp)
197{
198}
199
200#define _param_dup(valp) \
201 _Generic(valp, \
202 char **: _param_dup_charp, \
203 default: _param_nop)(valp)
204
205void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
206{
207 *dest = *src;
208#define DUP(T, x, ...) _param_dup(&dest->x);
209 I915_PARAMS_FOR_EACH(DUP);
210#undef DUP
211}
212
213static void _param_free_charp(char **valp)
214{
215 kfree(*valp);
216 *valp = NULL;
217}
218
219#define _param_free(valp) \
220 _Generic(valp, \
221 char **: _param_free_charp, \
222 default: _param_nop)(valp)
223
224/* free the allocated members, *not* the passed in params itself */
225void i915_params_free(struct i915_params *params)
226{
227#define FREE(T, x, ...) _param_free(¶ms->x);
228 I915_PARAMS_FOR_EACH(FREE);
229#undef FREE
230}