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/*
* 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(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(¶ms->x);
I915_PARAMS_FOR_EACH(FREE);
#undef FREE
}
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