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_GVT) 114 i915_param_named(enable_gvt, bool, 0400, 115 "Enable support for Intel GVT-g graphics virtualization host support(default:false)"); 116 #endif 117 118 #if CONFIG_DRM_I915_REQUEST_TIMEOUT 119 i915_param_named_unsafe(request_timeout_ms, uint, 0600, 120 "Default request/fence/batch buffer expiration timeout."); 121 #endif 122 123 i915_param_named_unsafe(lmem_size, uint, 0400, 124 "Set the lmem size(in MiB) for each region. (default: 0, all memory)"); 125 i915_param_named_unsafe(lmem_bar_size, uint, 0400, 126 "Set the lmem bar size(in MiB)."); 127 128 #if IS_ENABLED(CONFIG_DRM_I915_REPLAY_GPU_HANGS_API) 129 i915_param_named(enable_debug_only_api, bool, 0400, 130 "Enable support for unstable debug only userspace API. (default:false)"); 131 #endif 132 133 static void _param_print_bool(struct drm_printer *p, const char *name, 134 bool val) 135 { 136 drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val)); 137 } 138 139 static void _param_print_int(struct drm_printer *p, const char *name, 140 int val) 141 { 142 drm_printf(p, "i915.%s=%d\n", name, val); 143 } 144 145 static void _param_print_uint(struct drm_printer *p, const char *name, 146 unsigned int val) 147 { 148 drm_printf(p, "i915.%s=%u\n", name, val); 149 } 150 151 static void _param_print_ulong(struct drm_printer *p, const char *name, 152 unsigned long val) 153 { 154 drm_printf(p, "i915.%s=%lu\n", name, val); 155 } 156 157 static void _param_print_charp(struct drm_printer *p, const char *name, 158 const char *val) 159 { 160 drm_printf(p, "i915.%s=%s\n", name, val); 161 } 162 163 #define _param_print(p, name, val) \ 164 _Generic(val, \ 165 bool: _param_print_bool, \ 166 int: _param_print_int, \ 167 unsigned int: _param_print_uint, \ 168 unsigned long: _param_print_ulong, \ 169 char *: _param_print_charp)(p, name, val) 170 171 /** 172 * i915_params_dump - dump i915 modparams 173 * @params: i915 modparams 174 * @p: the &drm_printer 175 * 176 * Pretty printer for i915 modparams. 177 */ 178 void i915_params_dump(const struct i915_params *params, struct drm_printer *p) 179 { 180 #define PRINT(T, x, ...) _param_print(p, #x, params->x); 181 I915_PARAMS_FOR_EACH(PRINT); 182 #undef PRINT 183 } 184 185 static void _param_dup_charp(char **valp) 186 { 187 *valp = kstrdup(*valp, GFP_ATOMIC); 188 } 189 190 static void _param_nop(void *valp) 191 { 192 } 193 194 #define _param_dup(valp) \ 195 _Generic(valp, \ 196 char **: _param_dup_charp, \ 197 default: _param_nop)(valp) 198 199 void i915_params_copy(struct i915_params *dest, const struct i915_params *src) 200 { 201 *dest = *src; 202 #define DUP(T, x, ...) _param_dup(&dest->x); 203 I915_PARAMS_FOR_EACH(DUP); 204 #undef DUP 205 } 206 207 static void _param_free_charp(char **valp) 208 { 209 kfree(*valp); 210 *valp = NULL; 211 } 212 213 #define _param_free(valp) \ 214 _Generic(valp, \ 215 char **: _param_free_charp, \ 216 default: _param_nop)(valp) 217 218 /* free the allocated members, *not* the passed in params itself */ 219 void i915_params_free(struct i915_params *params) 220 { 221 #define FREE(T, x, ...) _param_free(¶ms->x); 222 I915_PARAMS_FOR_EACH(FREE); 223 #undef FREE 224 } 225