1 files changed, 229 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
new file mode 100644
index 000000000000..37746dd619fd
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -0,0 +1,229 @@
+/*
+ * 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,
+	"Deprecated. Use the 'nomodeset' kernel parameter instead.");
+
+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).");
+
+#if IS_ENABLED(CONFIG_DRM_I915_REPLAY_GPU_HANGS_API)
+i915_param_named(enable_debug_only_api, bool, 0400,
+		 "Enable support for unstable debug only userspace API. (default:false)");
+#endif
+
+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
+}