2 * Copyright © 2014 Intel Corporation
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5 * copy of this software and associated documentation files (the
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9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
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
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25 #include <linux/string_helpers.h>
27 #include <drm/drm_print.h>
29 #include "i915_params.h"
32 DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
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)
51 struct i915_params i915_modparams __read_mostly = {
52 #define MEMBER(T, member, value, ...) .member = (value),
53 I915_PARAMS_FOR_EACH(MEMBER)
58 * Note: As a rule, keep module parameter sysfs permissions read-only
59 * 0400. Runtime changes are only supported through i915 debugfs.
61 * For any exceptions requiring write access and runtime changes through module
62 * parameter sysfs, prevent debugfs file creation by setting the parameter's
66 i915_param_named(modeset, int, 0400,
67 "Deprecated. Use the 'nomodeset' kernel parameter instead.");
69 i915_param_named_unsafe(reset, uint, 0400,
70 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
72 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
73 i915_param_named(error_capture, bool, 0400,
74 "Record the GPU state following a hang. "
75 "This information in /sys/class/drm/card<N>/error is vital for "
76 "triaging and debugging hangs.");
79 i915_param_named_unsafe(enable_hangcheck, bool, 0400,
80 "Periodically check GPU activity for detecting hangs. "
81 "WARNING: Disabling this can cause system wide hangs. "
84 i915_param_named_unsafe(force_probe, charp, 0400,
85 "Force probe options for specified supported devices. "
86 "See CONFIG_DRM_I915_FORCE_PROBE for details.");
88 i915_param_named(memtest, bool, 0400,
89 "Perform a read/write test of all device memory on module load (default: off)");
91 i915_param_named(mmio_debug, int, 0400,
92 "Enable the MMIO debug code for the first N failures (default: off). "
93 "This may negatively affect performance.");
95 i915_param_named_unsafe(enable_guc, int, 0400,
96 "Enable GuC load for GuC submission and/or HuC load. "
97 "Required functionality can be selected using bitmask values. "
98 "(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");
100 i915_param_named(guc_log_level, int, 0400,
101 "GuC firmware logging level. Requires GuC to be loaded. "
102 "(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");
104 i915_param_named_unsafe(guc_firmware_path, charp, 0400,
105 "GuC firmware path to use instead of the default one");
107 i915_param_named_unsafe(huc_firmware_path, charp, 0400,
108 "HuC firmware path to use instead of the default one");
110 i915_param_named_unsafe(gsc_firmware_path, charp, 0400,
111 "GSC firmware path to use instead of the default one");
113 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
114 i915_param_named_unsafe(inject_probe_failure, uint, 0400,
115 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
118 #if IS_ENABLED(CONFIG_DRM_I915_GVT)
119 i915_param_named(enable_gvt, bool, 0400,
120 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");
123 #if CONFIG_DRM_I915_REQUEST_TIMEOUT
124 i915_param_named_unsafe(request_timeout_ms, uint, 0600,
125 "Default request/fence/batch buffer expiration timeout.");
128 i915_param_named_unsafe(lmem_size, uint, 0400,
129 "Set the lmem size(in MiB) for each region. (default: 0, all memory)");
130 i915_param_named_unsafe(lmem_bar_size, uint, 0400,
131 "Set the lmem bar size(in MiB).");
133 #if IS_ENABLED(CONFIG_DRM_I915_REPLAY_GPU_HANGS_API)
134 i915_param_named(enable_debug_only_api, bool, 0400,
135 "Enable support for unstable debug only userspace API. (default:false)");
138 static void _param_print_bool(struct drm_printer *p, const char *name,
141 drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val));
144 static void _param_print_int(struct drm_printer *p, const char *name,
147 drm_printf(p, "i915.%s=%d\n", name, val);
150 static void _param_print_uint(struct drm_printer *p, const char *name,
153 drm_printf(p, "i915.%s=%u\n", name, val);
156 static void _param_print_ulong(struct drm_printer *p, const char *name,
159 drm_printf(p, "i915.%s=%lu\n", name, val);
162 static void _param_print_charp(struct drm_printer *p, const char *name,
165 drm_printf(p, "i915.%s=%s\n", name, val);
168 #define _param_print(p, name, val) \
170 bool: _param_print_bool, \
171 int: _param_print_int, \
172 unsigned int: _param_print_uint, \
173 unsigned long: _param_print_ulong, \
174 char *: _param_print_charp)(p, name, val)
177 * i915_params_dump - dump i915 modparams
178 * @params: i915 modparams
179 * @p: the &drm_printer
181 * Pretty printer for i915 modparams.
183 void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
185 #define PRINT(T, x, ...) _param_print(p, #x, params->x);
186 I915_PARAMS_FOR_EACH(PRINT);
190 static void _param_dup_charp(char **valp)
192 *valp = kstrdup(*valp, GFP_ATOMIC);
195 static void _param_nop(void *valp)
199 #define _param_dup(valp) \
201 char **: _param_dup_charp, \
202 default: _param_nop)(valp)
204 void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
207 #define DUP(T, x, ...) _param_dup(&dest->x);
208 I915_PARAMS_FOR_EACH(DUP);
212 static void _param_free_charp(char **valp)
218 #define _param_free(valp) \
220 char **: _param_free_charp, \
221 default: _param_nop)(valp)
223 /* free the allocated members, *not* the passed in params itself */
224 void i915_params_free(struct i915_params *params)
226 #define FREE(T, x, ...) _param_free(¶ms->x);
227 I915_PARAMS_FOR_EACH(FREE);