drivers/gpu/drm/i915/i915_params.c - linux - Git at Google

 /*
  * Copyright © 2014 Intel Corporation
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sub license, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial portions
  * of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  * IN THE SOFTWARE.
  */

 #include <linux/string_helpers.h>

 #include <drm/drm_print.h>

 #include "i915_params.h"
 #include "i915_drv.h"

 DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
 			"DRM_UT_CORE",
 			"DRM_UT_DRIVER",
 			"DRM_UT_KMS",
 			"DRM_UT_PRIME",
 			"DRM_UT_ATOMIC",
 			"DRM_UT_VBL",
 			"DRM_UT_STATE",
 			"DRM_UT_LEASE",
 			"DRM_UT_DP",
 			"DRM_UT_DRMRES");

 #define i915_param_named(name, T, perm, desc) \
 	module_param_named(name, i915_modparams.name, T, perm); \
 	MODULE_PARM_DESC(name, desc)
 #define i915_param_named_unsafe(name, T, perm, desc) \
 	module_param_named_unsafe(name, i915_modparams.name, T, perm); \
 	MODULE_PARM_DESC(name, desc)

 struct i915_params i915_modparams __read_mostly = {
 #define MEMBER(T, member, value, ...) .member = (value),
 	I915_PARAMS_FOR_EACH(MEMBER)
 #undef MEMBER
 };

 /*
  * Note: As a rule, keep module parameter sysfs permissions read-only
  * 0400. Runtime changes are only supported through i915 debugfs.
  *
  * For any exceptions requiring write access and runtime changes through module
  * parameter sysfs, prevent debugfs file creation by setting the parameter's
  * debugfs mode to 0.
  */

 i915_param_named(modeset, int, 0400,
 	"Use kernel modesetting [KMS] (0=disable, "
 	"1=on, -1=force vga console preference [default])");

 i915_param_named_unsafe(reset, uint, 0400,
 	"Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");

 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
 i915_param_named(error_capture, bool, 0400,
 	"Record the GPU state following a hang. "
 	"This information in /sys/class/drm/card<N>/error is vital for "
 	"triaging and debugging hangs.");
 #endif

 i915_param_named_unsafe(enable_hangcheck, bool, 0400,
 	"Periodically check GPU activity for detecting hangs. "
 	"WARNING: Disabling this can cause system wide hangs. "
 	"(default: true)");

 i915_param_named_unsafe(force_probe, charp, 0400,
 	"Force probe options for specified supported devices. "
 	"See CONFIG_DRM_I915_FORCE_PROBE for details.");

 i915_param_named(memtest, bool, 0400,
 	"Perform a read/write test of all device memory on module load (default: off)");

 i915_param_named(mmio_debug, int, 0400,
 	"Enable the MMIO debug code for the first N failures (default: off). "
 	"This may negatively affect performance.");

 i915_param_named_unsafe(enable_guc, int, 0400,
 	"Enable GuC load for GuC submission and/or HuC load. "
 	"Required functionality can be selected using bitmask values. "
 	"(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");

 i915_param_named(guc_log_level, int, 0400,
 	"GuC firmware logging level. Requires GuC to be loaded. "
 	"(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");

 i915_param_named_unsafe(guc_firmware_path, charp, 0400,
 	"GuC firmware path to use instead of the default one");

 i915_param_named_unsafe(huc_firmware_path, charp, 0400,
 	"HuC firmware path to use instead of the default one");

 i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
 	"DMC firmware path to use instead of the default one");

 i915_param_named_unsafe(gsc_firmware_path, charp, 0400,
 	"GSC firmware path to use instead of the default one");

 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
 i915_param_named_unsafe(inject_probe_failure, uint, 0400,
 	"Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
 #endif

 #if IS_ENABLED(CONFIG_DRM_I915_GVT)
 i915_param_named(enable_gvt, bool, 0400,
 	"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
 #endif

 #if CONFIG_DRM_I915_REQUEST_TIMEOUT
 i915_param_named_unsafe(request_timeout_ms, uint, 0600,
 			"Default request/fence/batch buffer expiration timeout.");
 #endif

 i915_param_named_unsafe(lmem_size, uint, 0400,
 			"Set the lmem size(in MiB) for each region. (default: 0, all memory)");
 i915_param_named_unsafe(lmem_bar_size, uint, 0400,
 			"Set the lmem bar size(in MiB).");

 static void _param_print_bool(struct drm_printer *p, const char *name,
 			      bool val)
 {
 	drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val));
 }

 static void _param_print_int(struct drm_printer *p, const char *name,
 			     int val)
 {
 	drm_printf(p, "i915.%s=%d\n", name, val);
 }

 static void _param_print_uint(struct drm_printer *p, const char *name,
 			      unsigned int val)
 {
 	drm_printf(p, "i915.%s=%u\n", name, val);
 }

 static void _param_print_ulong(struct drm_printer *p, const char *name,
 			       unsigned long val)
 {
 	drm_printf(p, "i915.%s=%lu\n", name, val);
 }

 static void _param_print_charp(struct drm_printer *p, const char *name,
 			       const char *val)
 {
 	drm_printf(p, "i915.%s=%s\n", name, val);
 }

 #define _param_print(p, name, val)				\
 	_Generic(val,						\
 		 bool: _param_print_bool,			\
 		 int: _param_print_int,				\
 		 unsigned int: _param_print_uint,		\
 		 unsigned long: _param_print_ulong,		\
 		 char *: _param_print_charp)(p, name, val)

 /**
  * i915_params_dump - dump i915 modparams
  * @params: i915 modparams
  * @p: the &drm_printer
  *
  * Pretty printer for i915 modparams.
  */
 void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
 {
 #define PRINT(T, x, ...) _param_print(p, #x, params->x);
 	I915_PARAMS_FOR_EACH(PRINT);
 #undef PRINT
 }

 static void _param_dup_charp(char **valp)
 {
 	*valp = kstrdup(*valp, GFP_ATOMIC);
 }

 static void _param_nop(void *valp)
 {
 }

 #define _param_dup(valp)				\
 	_Generic(valp,					\
 		 char **: _param_dup_charp,		\
 		 default: _param_nop)(valp)

 void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
 {
 	*dest = *src;
 #define DUP(T, x, ...) _param_dup(&dest->x);
 	I915_PARAMS_FOR_EACH(DUP);
 #undef DUP
 }

 static void _param_free_charp(char **valp)
 {
 	kfree(*valp);
 	*valp = NULL;
 }

 #define _param_free(valp)				\
 	_Generic(valp,					\
 		 char **: _param_free_charp,		\
 		 default: _param_nop)(valp)

 /* free the allocated members, *not* the passed in params itself */
 void i915_params_free(struct i915_params *params)
 {
 #define FREE(T, x, ...) _param_free(&params->x);
 	I915_PARAMS_FOR_EACH(FREE);
 #undef FREE
 }
	/*
	* Copyright © 2014 Intel Corporation
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sub license, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:
	*
	* The above copyright notice and this permission notice (including the
	* next paragraph) shall be included in all copies or substantial portions
	* of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	* IN THE SOFTWARE.
	*/

	#include <linux/string_helpers.h>

	#include <drm/drm_print.h>

	#include "i915_params.h"
	#include "i915_drv.h"

	DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
	"DRM_UT_CORE",
	"DRM_UT_DRIVER",
	"DRM_UT_KMS",
	"DRM_UT_PRIME",
	"DRM_UT_ATOMIC",
	"DRM_UT_VBL",
	"DRM_UT_STATE",
	"DRM_UT_LEASE",
	"DRM_UT_DP",
	"DRM_UT_DRMRES");

	#define i915_param_named(name, T, perm, desc) \
	module_param_named(name, i915_modparams.name, T, perm); \
	MODULE_PARM_DESC(name, desc)
	#define i915_param_named_unsafe(name, T, perm, desc) \
	module_param_named_unsafe(name, i915_modparams.name, T, perm); \
	MODULE_PARM_DESC(name, desc)

	struct i915_params i915_modparams __read_mostly = {
	#define MEMBER(T, member, value, ...) .member = (value),
	I915_PARAMS_FOR_EACH(MEMBER)
	#undef MEMBER
	};

	/*
	* Note: As a rule, keep module parameter sysfs permissions read-only
	* 0400. Runtime changes are only supported through i915 debugfs.
	*
	* For any exceptions requiring write access and runtime changes through module
	* parameter sysfs, prevent debugfs file creation by setting the parameter's
	* debugfs mode to 0.
	*/

	i915_param_named(modeset, int, 0400,
	"Use kernel modesetting [KMS] (0=disable, "
	"1=on, -1=force vga console preference [default])");

	i915_param_named_unsafe(reset, uint, 0400,
	"Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");

	#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
	i915_param_named(error_capture, bool, 0400,
	"Record the GPU state following a hang. "
	"This information in /sys/class/drm/card<N>/error is vital for "
	"triaging and debugging hangs.");
	#endif

	i915_param_named_unsafe(enable_hangcheck, bool, 0400,
	"Periodically check GPU activity for detecting hangs. "
	"WARNING: Disabling this can cause system wide hangs. "
	"(default: true)");

	i915_param_named_unsafe(force_probe, charp, 0400,
	"Force probe options for specified supported devices. "
	"See CONFIG_DRM_I915_FORCE_PROBE for details.");

	i915_param_named(memtest, bool, 0400,
	"Perform a read/write test of all device memory on module load (default: off)");

	i915_param_named(mmio_debug, int, 0400,
	"Enable the MMIO debug code for the first N failures (default: off). "
	"This may negatively affect performance.");

	i915_param_named_unsafe(enable_guc, int, 0400,
	"Enable GuC load for GuC submission and/or HuC load. "
	"Required functionality can be selected using bitmask values. "
	"(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");

	i915_param_named(guc_log_level, int, 0400,
	"GuC firmware logging level. Requires GuC to be loaded. "
	"(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");

	i915_param_named_unsafe(guc_firmware_path, charp, 0400,
	"GuC firmware path to use instead of the default one");

	i915_param_named_unsafe(huc_firmware_path, charp, 0400,
	"HuC firmware path to use instead of the default one");

	i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
	"DMC firmware path to use instead of the default one");

	i915_param_named_unsafe(gsc_firmware_path, charp, 0400,
	"GSC firmware path to use instead of the default one");

	#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
	i915_param_named_unsafe(inject_probe_failure, uint, 0400,
	"Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
	#endif

	#if IS_ENABLED(CONFIG_DRM_I915_GVT)
	i915_param_named(enable_gvt, bool, 0400,
	"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
	#endif

	#if CONFIG_DRM_I915_REQUEST_TIMEOUT
	i915_param_named_unsafe(request_timeout_ms, uint, 0600,
	"Default request/fence/batch buffer expiration timeout.");
	#endif

	i915_param_named_unsafe(lmem_size, uint, 0400,
	"Set the lmem size(in MiB) for each region. (default: 0, all memory)");
	i915_param_named_unsafe(lmem_bar_size, uint, 0400,
	"Set the lmem bar size(in MiB).");

	static void _param_print_bool(struct drm_printer p, const char name,
	bool val)
	{
	drm_printf(p, "i915.%s=%s\n", name, str_yes_no(val));
	}

	static void _param_print_int(struct drm_printer p, const char name,
	int val)
	{
	drm_printf(p, "i915.%s=%d\n", name, val);
	}

	static void _param_print_uint(struct drm_printer p, const char name,
	unsigned int val)
	{
	drm_printf(p, "i915.%s=%u\n", name, val);
	}

	static void _param_print_ulong(struct drm_printer p, const char name,
	unsigned long val)
	{
	drm_printf(p, "i915.%s=%lu\n", name, val);
	}

	static void _param_print_charp(struct drm_printer p, const char name,
	const char *val)
	{
	drm_printf(p, "i915.%s=%s\n", name, val);
	}

	#define _param_print(p, name, val) \
	_Generic(val, \
	bool: _param_print_bool, \
	int: _param_print_int, \
	unsigned int: _param_print_uint, \
	unsigned long: _param_print_ulong, \
	char *: _param_print_charp)(p, name, val)

	/**
	* i915_params_dump - dump i915 modparams
	* @params: i915 modparams
	* @p: the &drm_printer
	*
	* Pretty printer for i915 modparams.
	*/
	void i915_params_dump(const struct i915_params params, struct drm_printer p)
	{
	#define PRINT(T, x, ...) _param_print(p, #x, params->x);
	I915_PARAMS_FOR_EACH(PRINT);
	#undef PRINT
	}

	static void _param_dup_charp(char **valp)
	{
	valp = kstrdup(valp, GFP_ATOMIC);
	}

	static void _param_nop(void *valp)
	{
	}

	#define _param_dup(valp) \
	_Generic(valp, \
	char **: _param_dup_charp, \
	default: _param_nop)(valp)

	void i915_params_copy(struct i915_params dest, const struct i915_params src)
	{
	dest = src;
	#define DUP(T, x, ...) _param_dup(&dest->x);
	I915_PARAMS_FOR_EACH(DUP);
	#undef DUP
	}

	static void _param_free_charp(char **valp)
	{
	kfree(*valp);
	*valp = NULL;
	}

	#define _param_free(valp) \
	_Generic(valp, \
	char **: _param_free_charp, \
	default: _param_nop)(valp)

	/* free the allocated members, not the passed in params itself */
	void i915_params_free(struct i915_params *params)
	{
	#define FREE(T, x, ...) _param_free(&params->x);
	I915_PARAMS_FOR_EACH(FREE);
	#undef FREE
	}