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 <drm/drm_print.h>
 26
 27#include "i915_params.h"
 28#include "i915_drv.h"
 29
 
 
 
 
 
 
 
 
 
 
 
 
 30#define i915_param_named(name, T, perm, desc) \
 31	module_param_named(name, i915_modparams.name, T, perm); \
 32	MODULE_PARM_DESC(name, desc)
 33#define i915_param_named_unsafe(name, T, perm, desc) \
 34	module_param_named_unsafe(name, i915_modparams.name, T, perm); \
 35	MODULE_PARM_DESC(name, desc)
 36
 37struct i915_params i915_modparams __read_mostly = {
 38#define MEMBER(T, member, value) .member = (value),
 39	I915_PARAMS_FOR_EACH(MEMBER)
 40#undef MEMBER
 41};
 42
 
 
 
 
 
 
 
 
 
 43i915_param_named(modeset, int, 0400,
 44	"Use kernel modesetting [KMS] (0=disable, "
 45	"1=on, -1=force vga console preference [default])");
 46
 47i915_param_named_unsafe(enable_dc, int, 0400,
 48	"Enable power-saving display C-states. "
 49	"(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
 50
 51i915_param_named_unsafe(enable_fbc, int, 0600,
 52	"Enable frame buffer compression for power savings "
 53	"(default: -1 (use per-chip default))");
 54
 55i915_param_named_unsafe(lvds_channel_mode, int, 0400,
 56	 "Specify LVDS channel mode "
 57	 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
 58
 59i915_param_named_unsafe(panel_use_ssc, int, 0600,
 60	"Use Spread Spectrum Clock with panels [LVDS/eDP] "
 61	"(default: auto from VBT)");
 62
 63i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
 64	"Override/Ignore selection of SDVO panel mode in the VBT "
 65	"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
 66
 67i915_param_named_unsafe(reset, int, 0600,
 68	"Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
 69
 70i915_param_named_unsafe(vbt_firmware, charp, 0400,
 71	"Load VBT from specified file under /lib/firmware");
 72
 73#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
 74i915_param_named(error_capture, bool, 0600,
 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
 80i915_param_named_unsafe(enable_hangcheck, bool, 0600,
 81	"Periodically check GPU activity for detecting hangs. "
 82	"WARNING: Disabling this can cause system wide hangs. "
 83	"(default: true)");
 84
 85i915_param_named_unsafe(enable_psr, int, 0600,
 86	"Enable PSR "
 87	"(0=disabled, 1=enabled) "
 88	"Default: -1 (use per-chip default)");
 89
 90i915_param_named_unsafe(force_probe, charp, 0400,
 91	"Force probe the driver for specified devices. "
 92	"See CONFIG_DRM_I915_FORCE_PROBE for details.");
 93
 94i915_param_named_unsafe(alpha_support, bool, 0400,
 95	"Deprecated. See i915.force_probe.");
 96
 97i915_param_named_unsafe(disable_power_well, int, 0400,
 98	"Disable display power wells when possible "
 99	"(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
100
101i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)");
102
103i915_param_named(fastboot, int, 0600,
104	"Try to skip unnecessary mode sets at boot time "
105	"(0=disabled, 1=enabled) "
106	"Default: -1 (use per-chip default)");
107
108i915_param_named_unsafe(prefault_disable, bool, 0600,
109	"Disable page prefaulting for pread/pwrite/reloc (default:false). "
110	"For developers only.");
111
112i915_param_named_unsafe(load_detect_test, bool, 0600,
113	"Force-enable the VGA load detect code for testing (default:false). "
114	"For developers only.");
115
116i915_param_named_unsafe(force_reset_modeset_test, bool, 0600,
117	"Force a modeset during gpu reset for testing (default:false). "
118	"For developers only.");
119
120i915_param_named_unsafe(invert_brightness, int, 0600,
121	"Invert backlight brightness "
122	"(-1 force normal, 0 machine defaults, 1 force inversion), please "
123	"report PCI device ID, subsystem vendor and subsystem device ID "
124	"to dri-devel@lists.freedesktop.org, if your machine needs it. "
125	"It will then be included in an upcoming module version.");
126
127i915_param_named(disable_display, bool, 0400,
128	"Disable display (default: false)");
129
130i915_param_named(mmio_debug, int, 0600,
131	"Enable the MMIO debug code for the first N failures (default: off). "
132	"This may negatively affect performance.");
133
134i915_param_named(verbose_state_checks, bool, 0600,
135	"Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
136
137i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
138	"Force enable atomic functionality on platforms that don't have full support yet.");
139
140/* WA to get away with the default setting in VBT for early platforms.Will be removed */
141i915_param_named_unsafe(edp_vswing, int, 0400,
142	"Ignore/Override vswing pre-emph table selection from VBT "
143	"(0=use value from vbt [default], 1=low power swing(200mV),"
144	"2=default swing(400mV))");
145
146i915_param_named_unsafe(enable_guc, int, 0400,
147	"Enable GuC load for GuC submission and/or HuC load. "
148	"Required functionality can be selected using bitmask values. "
149	"(-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load)");
150
151i915_param_named(guc_log_level, int, 0400,
152	"GuC firmware logging level. Requires GuC to be loaded. "
153	"(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");
154
155i915_param_named_unsafe(guc_firmware_path, charp, 0400,
156	"GuC firmware path to use instead of the default one");
157
158i915_param_named_unsafe(huc_firmware_path, charp, 0400,
159	"HuC firmware path to use instead of the default one");
160
161i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
162	"DMC firmware path to use instead of the default one");
163
164i915_param_named_unsafe(enable_dp_mst, bool, 0600,
165	"Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
166
167#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
168i915_param_named_unsafe(inject_load_failure, uint, 0400,
169	"Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
170#endif
171
172i915_param_named(enable_dpcd_backlight, int, 0600,
173	"Enable support for DPCD backlight control"
174	"(-1=use per-VBT LFP backlight type setting, 0=disabled [default], 1=enabled)");
175
176#if IS_ENABLED(CONFIG_DRM_I915_GVT)
177i915_param_named(enable_gvt, bool, 0400,
178	"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
179#endif
180
181static __always_inline void _print_param(struct drm_printer *p,
182					 const char *name,
183					 const char *type,
184					 const void *x)
185{
186	if (!__builtin_strcmp(type, "bool"))
187		drm_printf(p, "i915.%s=%s\n", name, yesno(*(const bool *)x));
188	else if (!__builtin_strcmp(type, "int"))
189		drm_printf(p, "i915.%s=%d\n", name, *(const int *)x);
190	else if (!__builtin_strcmp(type, "unsigned int"))
191		drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x);
192	else if (!__builtin_strcmp(type, "char *"))
193		drm_printf(p, "i915.%s=%s\n", name, *(const char **)x);
194	else
195		WARN_ONCE(1, "no printer defined for param type %s (i915.%s)\n",
196			  type, name);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
197}
198
 
 
 
 
 
 
 
 
199/**
200 * i915_params_dump - dump i915 modparams
201 * @params: i915 modparams
202 * @p: the &drm_printer
203 *
204 * Pretty printer for i915 modparams.
205 */
206void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
207{
208#define PRINT(T, x, ...) _print_param(p, #x, #T, &params->x);
209	I915_PARAMS_FOR_EACH(PRINT);
210#undef PRINT
211}
212
213static __always_inline void dup_param(const char *type, void *x)
214{
215	if (!__builtin_strcmp(type, "char *"))
216		*(void **)x = kstrdup(*(void **)x, GFP_ATOMIC);
217}
218
 
 
 
 
 
 
 
 
 
219void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
220{
221	*dest = *src;
222#define DUP(T, x, ...) dup_param(#T, &dest->x);
223	I915_PARAMS_FOR_EACH(DUP);
224#undef DUP
225}
226
227static __always_inline void free_param(const char *type, void *x)
228{
229	if (!__builtin_strcmp(type, "char *")) {
230		kfree(*(void **)x);
231		*(void **)x = NULL;
232	}
233}
234
 
 
 
 
 
235/* free the allocated members, *not* the passed in params itself */
236void i915_params_free(struct i915_params *params)
237{
238#define FREE(T, x, ...) free_param(#T, &params->x);
239	I915_PARAMS_FOR_EACH(FREE);
240#undef FREE
241}

  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
 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 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
 66i915_param_named(modeset, int, 0400,
 67	"Use kernel modesetting [KMS] (0=disable, "
 68	"1=on, -1=force vga console preference [default])");
 69
 70i915_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)
 74i915_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
 80i915_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
 
 
 
 
 
 85i915_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
 89i915_param_named(memtest, bool, 0400,
 90	"Perform a read/write test of all device memory on module load (default: off)");
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 91
 92i915_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
 
 
 
 
 
 
 
 
 
 
 
 
 96i915_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
101i915_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
105i915_param_named_unsafe(guc_firmware_path, charp, 0400,
106	"GuC firmware path to use instead of the default one");
107
108i915_param_named_unsafe(huc_firmware_path, charp, 0400,
109	"HuC firmware path to use instead of the default one");
110
111i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
112	"DMC firmware path to use instead of the default one");
113
114i915_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)
118i915_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)
123i915_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
128i915_param_named_unsafe(request_timeout_ms, uint, 0600,
129			"Default request/fence/batch buffer expiration timeout.");
130#endif
131
132i915_param_named_unsafe(lmem_size, uint, 0400,
133			"Set the lmem size(in MiB) for each region. (default: 0, all memory)");
134i915_param_named_unsafe(lmem_bar_size, uint, 0400,
135			"Set the lmem bar size(in MiB).");
136
137static 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
143static 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
149static 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
155static 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
161static 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 */
182void 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
189static void _param_dup_charp(char **valp)
190{
191	*valp = kstrdup(*valp, GFP_ATOMIC);
 
192}
193
194static 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
203void 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
211static 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 */
223void i915_params_free(struct i915_params *params)
224{
225#define FREE(T, x, ...) _param_free(&params->x);
226	I915_PARAMS_FOR_EACH(FREE);
227#undef FREE
228}