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 32 DECLARE_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 51 struct 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 66 i915_param_named(modeset, int, 0400, 67 "Deprecated. Use the 'nomodeset' kernel parameter instead."); 68 69 i915_param_named_unsafe(reset, uint, 0400, 70 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])"); 71 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."); 77 #endif 78 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. " 82 "(default: true)"); 83 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."); 87 88 i915_param_named(memtest, bool, 0400, 89 "Perform a read/write test of all device memory on module load (default: off)"); 90 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."); 94 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)"); 99 100 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)"); 103 104 i915_param_named_unsafe(guc_firmware_path, charp, 0400, 105 "GuC firmware path to use instead of the default one"); 106 107 i915_param_named_unsafe(huc_firmware_path, charp, 0400, 108 "HuC firmware path to use instead of the default one"); 109 110 i915_param_named_unsafe(gsc_firmware_path, charp, 0400, 111 "GSC firmware path to use instead of the default one"); 112 113 #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)"); 116 #endif 117 118 #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)"); 121 #endif 122 123 #if CONFIG_DRM_I915_REQUEST_TIMEOUT 124 i915_param_named_unsafe(request_timeout_ms, uint, 0600, 125 "Default request/fence/batch buffer expiration timeout."); 126 #endif 127 128 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)."); 132 133 #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)"); 136 #endif 137 138 static void _param_print_bool(struct drm_printer *p, const char *name, 139 bool val) 140 { 141 drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val)); 142 } 143 144 static void _param_print_int(struct drm_printer *p, const char *name, 145 int val) 146 { 147 drm_printf(p, "i915.%s=%d\n", name, val); 148 } 149 150 static void _param_print_uint(struct drm_printer *p, const char *name, 151 unsigned int val) 152 { 153 drm_printf(p, "i915.%s=%u\n", name, val); 154 } 155 156 static void _param_print_ulong(struct drm_printer *p, const char *name, 157 unsigned long val) 158 { 159 drm_printf(p, "i915.%s=%lu\n", name, val); 160 } 161 162 static void _param_print_charp(struct drm_printer *p, const char *name, 163 const char *val) 164 { 165 drm_printf(p, "i915.%s=%s\n", name, val); 166 } 167 168 #define _param_print(p, name, val) \ 169 _Generic(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) 175 176 /** 177 * i915_params_dump - dump i915 modparams 178 * @params: i915 modparams 179 * @p: the &drm_printer 180 * 181 * Pretty printer for i915 modparams. 182 */ 183 void i915_params_dump(const struct i915_params *params, struct drm_printer *p) 184 { 185 #define PRINT(T, x, ...) _param_print(p, #x, params->x); 186 I915_PARAMS_FOR_EACH(PRINT); 187 #undef PRINT 188 } 189 190 static void _param_dup_charp(char **valp) 191 { 192 *valp = kstrdup(*valp, GFP_ATOMIC); 193 } 194 195 static void _param_nop(void *valp) 196 { 197 } 198 199 #define _param_dup(valp) \ 200 _Generic(valp, \ 201 char **: _param_dup_charp, \ 202 default: _param_nop)(valp) 203 204 void i915_params_copy(struct i915_params *dest, const struct i915_params *src) 205 { 206 *dest = *src; 207 #define DUP(T, x, ...) _param_dup(&dest->x); 208 I915_PARAMS_FOR_EACH(DUP); 209 #undef DUP 210 } 211 212 static void _param_free_charp(char **valp) 213 { 214 kfree(*valp); 215 *valp = NULL; 216 } 217 218 #define _param_free(valp) \ 219 _Generic(valp, \ 220 char **: _param_free_charp, \ 221 default: _param_nop)(valp) 222 223 /* free the allocated members, *not* the passed in params itself */ 224 void i915_params_free(struct i915_params *params) 225 { 226 #define FREE(T, x, ...) _param_free(¶ms->x); 227 I915_PARAMS_FOR_EACH(FREE); 228 #undef FREE 229 } 230