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 "Use kernel modesetting [KMS] (0=disable, " 68 "1=on, -1=force vga console preference [default])"); 69 70 i915_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) 74 i915_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 80 i915_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 85 i915_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 89 i915_param_named(memtest, bool, 0400, 90 "Perform a read/write test of all device memory on module load (default: off)"); 91 92 i915_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 96 i915_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)"); 100 101 i915_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)"); 104 105 i915_param_named_unsafe(guc_firmware_path, charp, 0400, 106 "GuC firmware path to use instead of the default one"); 107 108 i915_param_named_unsafe(huc_firmware_path, charp, 0400, 109 "HuC firmware path to use instead of the default one"); 110 111 i915_param_named_unsafe(dmc_firmware_path, charp, 0400, 112 "DMC firmware path to use instead of the default one"); 113 114 i915_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) 118 i915_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) 123 i915_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 128 i915_param_named_unsafe(request_timeout_ms, uint, 0600, 129 "Default request/fence/batch buffer expiration timeout."); 130 #endif 131 132 i915_param_named_unsafe(lmem_size, uint, 0400, 133 "Set the lmem size(in MiB) for each region. (default: 0, all memory)"); 134 i915_param_named_unsafe(lmem_bar_size, uint, 0400, 135 "Set the lmem bar size(in MiB)."); 136 137 static 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 } 142 143 static 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 } 148 149 static 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 } 154 155 static 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 } 160 161 static 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 */ 182 void 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 } 188 189 static void _param_dup_charp(char **valp) 190 { 191 *valp = kstrdup(*valp, GFP_ATOMIC); 192 } 193 194 static 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) 202 203 void 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 } 210 211 static 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 */ 223 void 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 } 229