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1/*2 * Copyright © 2014 Intel Corporation3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the6 * "Software"), to deal in the Software without restriction, including7 * without limitation the rights to use, copy, modify, merge, publish,8 * distribute, sub license, and/or sell copies of the Software, and to9 * permit persons to whom the Software is furnished to do so, subject to10 * the following conditions:11 *12 * The above copyright notice and this permission notice (including the13 * next paragraph) shall be included in all copies or substantial portions14 * of the Software.15 *16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS22 * 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 MEMBER55};56 57/*58 * Note: As a rule, keep module parameter sysfs permissions read-only59 * 0400. Runtime changes are only supported through i915 debugfs.60 *61 * For any exceptions requiring write access and runtime changes through module62 * parameter sysfs, prevent debugfs file creation by setting the parameter's63 * debugfs mode to 0.64 */65 66i915_param_named(modeset, int, 0400,67 "Deprecated. Use the 'nomodeset' kernel parameter instead.");68 69i915_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)73i915_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#endif78 79i915_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 84i915_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 88i915_param_named(memtest, bool, 0400,89 "Perform a read/write test of all device memory on module load (default: off)");90 91i915_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 95i915_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 100i915_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 104i915_param_named_unsafe(guc_firmware_path, charp, 0400,105 "GuC firmware path to use instead of the default one");106 107i915_param_named_unsafe(huc_firmware_path, charp, 0400,108 "HuC firmware path to use instead of the default one");109 110i915_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)114i915_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#endif117 118#if IS_ENABLED(CONFIG_DRM_I915_GVT)119i915_param_named(enable_gvt, bool, 0400,120 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");121#endif122 123#if CONFIG_DRM_I915_REQUEST_TIMEOUT124i915_param_named_unsafe(request_timeout_ms, uint, 0600,125 "Default request/fence/batch buffer expiration timeout.");126#endif127 128i915_param_named_unsafe(lmem_size, uint, 0400,129 "Set the lmem size(in MiB) for each region. (default: 0, all memory)");130i915_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)134i915_param_named(enable_debug_only_api, bool, 0400,135 "Enable support for unstable debug only userspace API. (default:false)");136#endif137 138static 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 144static 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 150static 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 156static 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 162static 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 modparams178 * @params: i915 modparams179 * @p: the &drm_printer180 *181 * Pretty printer for i915 modparams.182 */183void 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 PRINT188}189 190static void _param_dup_charp(char **valp)191{192 *valp = kstrdup(*valp, GFP_ATOMIC);193}194 195static 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 204void 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 DUP210}211 212static 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 */224void 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 FREE229}230