Loading...
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(dmc_firmware_path, charp, 0400,
112 "DMC firmware path to use instead of the default one");
113
114i915_param_named_unsafe(gsc_firmware_path, charp, 0400,
115 "GSC firmware path to use instead of the default one");
116
117#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
118i915_param_named_unsafe(inject_probe_failure, uint, 0400,
119 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
120#endif
121
122#if IS_ENABLED(CONFIG_DRM_I915_GVT)
123i915_param_named(enable_gvt, bool, 0400,
124 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");
125#endif
126
127#if CONFIG_DRM_I915_REQUEST_TIMEOUT
128i915_param_named_unsafe(request_timeout_ms, uint, 0600,
129 "Default request/fence/batch buffer expiration timeout.");
130#endif
131
132i915_param_named_unsafe(lmem_size, uint, 0400,
133 "Set the lmem size(in MiB) for each region. (default: 0, all memory)");
134i915_param_named_unsafe(lmem_bar_size, uint, 0400,
135 "Set the lmem bar size(in MiB).");
136
137static void _param_print_bool(struct drm_printer *p, const char *name,
138 bool val)
139{
140 drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val));
141}
142
143static void _param_print_int(struct drm_printer *p, const char *name,
144 int val)
145{
146 drm_printf(p, "i915.%s=%d\n", name, val);
147}
148
149static void _param_print_uint(struct drm_printer *p, const char *name,
150 unsigned int val)
151{
152 drm_printf(p, "i915.%s=%u\n", name, val);
153}
154
155static void _param_print_ulong(struct drm_printer *p, const char *name,
156 unsigned long val)
157{
158 drm_printf(p, "i915.%s=%lu\n", name, val);
159}
160
161static void _param_print_charp(struct drm_printer *p, const char *name,
162 const char *val)
163{
164 drm_printf(p, "i915.%s=%s\n", name, val);
165}
166
167#define _param_print(p, name, val) \
168 _Generic(val, \
169 bool: _param_print_bool, \
170 int: _param_print_int, \
171 unsigned int: _param_print_uint, \
172 unsigned long: _param_print_ulong, \
173 char *: _param_print_charp)(p, name, val)
174
175/**
176 * i915_params_dump - dump i915 modparams
177 * @params: i915 modparams
178 * @p: the &drm_printer
179 *
180 * Pretty printer for i915 modparams.
181 */
182void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
183{
184#define PRINT(T, x, ...) _param_print(p, #x, params->x);
185 I915_PARAMS_FOR_EACH(PRINT);
186#undef PRINT
187}
188
189static void _param_dup_charp(char **valp)
190{
191 *valp = kstrdup(*valp, GFP_ATOMIC);
192}
193
194static void _param_nop(void *valp)
195{
196}
197
198#define _param_dup(valp) \
199 _Generic(valp, \
200 char **: _param_dup_charp, \
201 default: _param_nop)(valp)
202
203void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
204{
205 *dest = *src;
206#define DUP(T, x, ...) _param_dup(&dest->x);
207 I915_PARAMS_FOR_EACH(DUP);
208#undef DUP
209}
210
211static void _param_free_charp(char **valp)
212{
213 kfree(*valp);
214 *valp = NULL;
215}
216
217#define _param_free(valp) \
218 _Generic(valp, \
219 char **: _param_free_charp, \
220 default: _param_nop)(valp)
221
222/* free the allocated members, *not* the passed in params itself */
223void i915_params_free(struct i915_params *params)
224{
225#define FREE(T, x, ...) _param_free(¶ms->x);
226 I915_PARAMS_FOR_EACH(FREE);
227#undef FREE
228}