1 // SPDX-License-Identifier: MIT
2 
3 /*
4  * Copyright © 2019 Intel Corporation
5  */
6 
7 #include <linux/seq_file.h>
8 #include <linux/string_helpers.h>
9 
10 #include "i915_drv.h"
11 #include "i915_reg.h"
12 #include "intel_gt.h"
13 #include "intel_gt_clock_utils.h"
14 #include "intel_gt_debugfs.h"
15 #include "intel_gt_pm.h"
16 #include "intel_gt_pm_debugfs.h"
17 #include "intel_gt_regs.h"
18 #include "intel_llc.h"
19 #include "intel_mchbar_regs.h"
20 #include "intel_pcode.h"
21 #include "intel_rc6.h"
22 #include "intel_rps.h"
23 #include "intel_runtime_pm.h"
24 #include "intel_uncore.h"
25 #include "vlv_sideband.h"
26 
27 void intel_gt_pm_debugfs_forcewake_user_open(struct intel_gt *gt)
28 {
29 	atomic_inc(&gt->user_wakeref);
30 	intel_gt_pm_get(gt);
31 	if (GRAPHICS_VER(gt->i915) >= 6)
32 		intel_uncore_forcewake_user_get(gt->uncore);
33 }
34 
35 void intel_gt_pm_debugfs_forcewake_user_release(struct intel_gt *gt)
36 {
37 	if (GRAPHICS_VER(gt->i915) >= 6)
38 		intel_uncore_forcewake_user_put(gt->uncore);
39 	intel_gt_pm_put(gt);
40 	atomic_dec(&gt->user_wakeref);
41 }
42 
43 static int forcewake_user_open(struct inode *inode, struct file *file)
44 {
45 	struct intel_gt *gt = inode->i_private;
46 
47 	intel_gt_pm_debugfs_forcewake_user_open(gt);
48 
49 	return 0;
50 }
51 
52 static int forcewake_user_release(struct inode *inode, struct file *file)
53 {
54 	struct intel_gt *gt = inode->i_private;
55 
56 	intel_gt_pm_debugfs_forcewake_user_release(gt);
57 
58 	return 0;
59 }
60 
61 static const struct file_operations forcewake_user_fops = {
62 	.owner = THIS_MODULE,
63 	.open = forcewake_user_open,
64 	.release = forcewake_user_release,
65 };
66 
67 static int fw_domains_show(struct seq_file *m, void *data)
68 {
69 	struct intel_gt *gt = m->private;
70 	struct intel_uncore *uncore = gt->uncore;
71 	struct intel_uncore_forcewake_domain *fw_domain;
72 	unsigned int tmp;
73 
74 	seq_printf(m, "user.bypass_count = %u\n",
75 		   uncore->user_forcewake_count);
76 
77 	for_each_fw_domain(fw_domain, uncore, tmp)
78 		seq_printf(m, "%s.wake_count = %u\n",
79 			   intel_uncore_forcewake_domain_to_str(fw_domain->id),
80 			   READ_ONCE(fw_domain->wake_count));
81 
82 	return 0;
83 }
84 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(fw_domains);
85 
86 static int vlv_drpc(struct seq_file *m)
87 {
88 	struct intel_gt *gt = m->private;
89 	struct intel_uncore *uncore = gt->uncore;
90 	u32 rcctl1, pw_status, mt_fwake_req;
91 
92 	mt_fwake_req = intel_uncore_read_fw(uncore, FORCEWAKE_MT);
93 	pw_status = intel_uncore_read(uncore, VLV_GTLC_PW_STATUS);
94 	rcctl1 = intel_uncore_read(uncore, GEN6_RC_CONTROL);
95 
96 	seq_printf(m, "RC6 Enabled: %s\n",
97 		   str_yes_no(rcctl1 & (GEN7_RC_CTL_TO_MODE |
98 					GEN6_RC_CTL_EI_MODE(1))));
99 	seq_printf(m, "Multi-threaded Forcewake Request: 0x%x\n", mt_fwake_req);
100 	seq_printf(m, "Render Power Well: %s\n",
101 		   (pw_status & VLV_GTLC_PW_RENDER_STATUS_MASK) ? "Up" : "Down");
102 	seq_printf(m, "Media Power Well: %s\n",
103 		   (pw_status & VLV_GTLC_PW_MEDIA_STATUS_MASK) ? "Up" : "Down");
104 
105 	intel_rc6_print_residency(m, "Render RC6 residency since boot:", INTEL_RC6_RES_RC6);
106 	intel_rc6_print_residency(m, "Media RC6 residency since boot:", INTEL_RC6_RES_VLV_MEDIA);
107 
108 	return fw_domains_show(m, NULL);
109 }
110 
111 static int gen6_drpc(struct seq_file *m)
112 {
113 	struct intel_gt *gt = m->private;
114 	struct drm_i915_private *i915 = gt->i915;
115 	struct intel_uncore *uncore = gt->uncore;
116 	u32 gt_core_status, mt_fwake_req, rcctl1, rc6vids = 0;
117 	u32 gen9_powergate_enable = 0, gen9_powergate_status = 0;
118 
119 	mt_fwake_req = intel_uncore_read_fw(uncore, FORCEWAKE_MT);
120 	gt_core_status = intel_uncore_read_fw(uncore, GEN6_GT_CORE_STATUS);
121 
122 	rcctl1 = intel_uncore_read(uncore, GEN6_RC_CONTROL);
123 	if (GRAPHICS_VER(i915) >= 9) {
124 		gen9_powergate_enable =
125 			intel_uncore_read(uncore, GEN9_PG_ENABLE);
126 		gen9_powergate_status =
127 			intel_uncore_read(uncore, GEN9_PWRGT_DOMAIN_STATUS);
128 	}
129 
130 	if (GRAPHICS_VER(i915) <= 7)
131 		snb_pcode_read(gt->uncore, GEN6_PCODE_READ_RC6VIDS, &rc6vids, NULL);
132 
133 	seq_printf(m, "RC1e Enabled: %s\n",
134 		   str_yes_no(rcctl1 & GEN6_RC_CTL_RC1e_ENABLE));
135 	seq_printf(m, "RC6 Enabled: %s\n",
136 		   str_yes_no(rcctl1 & GEN6_RC_CTL_RC6_ENABLE));
137 	if (GRAPHICS_VER(i915) >= 9) {
138 		seq_printf(m, "Render Well Gating Enabled: %s\n",
139 			   str_yes_no(gen9_powergate_enable & GEN9_RENDER_PG_ENABLE));
140 		seq_printf(m, "Media Well Gating Enabled: %s\n",
141 			   str_yes_no(gen9_powergate_enable & GEN9_MEDIA_PG_ENABLE));
142 	}
143 	seq_printf(m, "Deep RC6 Enabled: %s\n",
144 		   str_yes_no(rcctl1 & GEN6_RC_CTL_RC6p_ENABLE));
145 	seq_printf(m, "Deepest RC6 Enabled: %s\n",
146 		   str_yes_no(rcctl1 & GEN6_RC_CTL_RC6pp_ENABLE));
147 	seq_puts(m, "Current RC state: ");
148 	switch (gt_core_status & GEN6_RCn_MASK) {
149 	case GEN6_RC0:
150 		if (gt_core_status & GEN6_CORE_CPD_STATE_MASK)
151 			seq_puts(m, "Core Power Down\n");
152 		else
153 			seq_puts(m, "on\n");
154 		break;
155 	case GEN6_RC3:
156 		seq_puts(m, "RC3\n");
157 		break;
158 	case GEN6_RC6:
159 		seq_puts(m, "RC6\n");
160 		break;
161 	case GEN6_RC7:
162 		seq_puts(m, "RC7\n");
163 		break;
164 	default:
165 		seq_puts(m, "Unknown\n");
166 		break;
167 	}
168 
169 	seq_printf(m, "Core Power Down: %s\n",
170 		   str_yes_no(gt_core_status & GEN6_CORE_CPD_STATE_MASK));
171 	seq_printf(m, "Multi-threaded Forcewake Request: 0x%x\n", mt_fwake_req);
172 	if (GRAPHICS_VER(i915) >= 9) {
173 		seq_printf(m, "Render Power Well: %s\n",
174 			   (gen9_powergate_status &
175 			    GEN9_PWRGT_RENDER_STATUS_MASK) ? "Up" : "Down");
176 		seq_printf(m, "Media Power Well: %s\n",
177 			   (gen9_powergate_status &
178 			    GEN9_PWRGT_MEDIA_STATUS_MASK) ? "Up" : "Down");
179 	}
180 
181 	/* Not exactly sure what this is */
182 	intel_rc6_print_residency(m, "RC6 \"Locked to RPn\" residency since boot:",
183 				  INTEL_RC6_RES_RC6_LOCKED);
184 	intel_rc6_print_residency(m, "RC6 residency since boot:", INTEL_RC6_RES_RC6);
185 	intel_rc6_print_residency(m, "RC6+ residency since boot:", INTEL_RC6_RES_RC6p);
186 	intel_rc6_print_residency(m, "RC6++ residency since boot:", INTEL_RC6_RES_RC6pp);
187 
188 	if (GRAPHICS_VER(i915) <= 7) {
189 		seq_printf(m, "RC6   voltage: %dmV\n",
190 			   GEN6_DECODE_RC6_VID(((rc6vids >> 0) & 0xff)));
191 		seq_printf(m, "RC6+  voltage: %dmV\n",
192 			   GEN6_DECODE_RC6_VID(((rc6vids >> 8) & 0xff)));
193 		seq_printf(m, "RC6++ voltage: %dmV\n",
194 			   GEN6_DECODE_RC6_VID(((rc6vids >> 16) & 0xff)));
195 	}
196 
197 	return fw_domains_show(m, NULL);
198 }
199 
200 static int ilk_drpc(struct seq_file *m)
201 {
202 	struct intel_gt *gt = m->private;
203 	struct intel_uncore *uncore = gt->uncore;
204 	u32 rgvmodectl, rstdbyctl;
205 	u16 crstandvid;
206 
207 	rgvmodectl = intel_uncore_read(uncore, MEMMODECTL);
208 	rstdbyctl = intel_uncore_read(uncore, RSTDBYCTL);
209 	crstandvid = intel_uncore_read16(uncore, CRSTANDVID);
210 
211 	seq_printf(m, "HD boost: %s\n",
212 		   str_yes_no(rgvmodectl & MEMMODE_BOOST_EN));
213 	seq_printf(m, "Boost freq: %d\n",
214 		   (rgvmodectl & MEMMODE_BOOST_FREQ_MASK) >>
215 		   MEMMODE_BOOST_FREQ_SHIFT);
216 	seq_printf(m, "HW control enabled: %s\n",
217 		   str_yes_no(rgvmodectl & MEMMODE_HWIDLE_EN));
218 	seq_printf(m, "SW control enabled: %s\n",
219 		   str_yes_no(rgvmodectl & MEMMODE_SWMODE_EN));
220 	seq_printf(m, "Gated voltage change: %s\n",
221 		   str_yes_no(rgvmodectl & MEMMODE_RCLK_GATE));
222 	seq_printf(m, "Starting frequency: P%d\n",
223 		   (rgvmodectl & MEMMODE_FSTART_MASK) >> MEMMODE_FSTART_SHIFT);
224 	seq_printf(m, "Max P-state: P%d\n",
225 		   (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT);
226 	seq_printf(m, "Min P-state: P%d\n", (rgvmodectl & MEMMODE_FMIN_MASK));
227 	seq_printf(m, "RS1 VID: %d\n", (crstandvid & 0x3f));
228 	seq_printf(m, "RS2 VID: %d\n", ((crstandvid >> 8) & 0x3f));
229 	seq_printf(m, "Render standby enabled: %s\n",
230 		   str_yes_no(!(rstdbyctl & RCX_SW_EXIT)));
231 	seq_puts(m, "Current RS state: ");
232 	switch (rstdbyctl & RSX_STATUS_MASK) {
233 	case RSX_STATUS_ON:
234 		seq_puts(m, "on\n");
235 		break;
236 	case RSX_STATUS_RC1:
237 		seq_puts(m, "RC1\n");
238 		break;
239 	case RSX_STATUS_RC1E:
240 		seq_puts(m, "RC1E\n");
241 		break;
242 	case RSX_STATUS_RS1:
243 		seq_puts(m, "RS1\n");
244 		break;
245 	case RSX_STATUS_RS2:
246 		seq_puts(m, "RS2 (RC6)\n");
247 		break;
248 	case RSX_STATUS_RS3:
249 		seq_puts(m, "RC3 (RC6+)\n");
250 		break;
251 	default:
252 		seq_puts(m, "unknown\n");
253 		break;
254 	}
255 
256 	return 0;
257 }
258 
259 static int mtl_drpc(struct seq_file *m)
260 {
261 	struct intel_gt *gt = m->private;
262 	struct intel_uncore *uncore = gt->uncore;
263 	u32 gt_core_status, rcctl1, mt_fwake_req;
264 	u32 mtl_powergate_enable = 0, mtl_powergate_status = 0;
265 
266 	mt_fwake_req = intel_uncore_read_fw(uncore, FORCEWAKE_MT);
267 	gt_core_status = intel_uncore_read(uncore, MTL_MIRROR_TARGET_WP1);
268 
269 	rcctl1 = intel_uncore_read(uncore, GEN6_RC_CONTROL);
270 	mtl_powergate_enable = intel_uncore_read(uncore, GEN9_PG_ENABLE);
271 	mtl_powergate_status = intel_uncore_read(uncore,
272 						 GEN9_PWRGT_DOMAIN_STATUS);
273 
274 	seq_printf(m, "RC6 Enabled: %s\n",
275 		   str_yes_no(rcctl1 & GEN6_RC_CTL_RC6_ENABLE));
276 	if (gt->type == GT_MEDIA) {
277 		seq_printf(m, "Media Well Gating Enabled: %s\n",
278 			   str_yes_no(mtl_powergate_enable & GEN9_MEDIA_PG_ENABLE));
279 	} else {
280 		seq_printf(m, "Render Well Gating Enabled: %s\n",
281 			   str_yes_no(mtl_powergate_enable & GEN9_RENDER_PG_ENABLE));
282 	}
283 
284 	seq_puts(m, "Current RC state: ");
285 	switch (REG_FIELD_GET(MTL_CC_MASK, gt_core_status)) {
286 	case MTL_CC0:
287 		seq_puts(m, "RC0\n");
288 		break;
289 	case MTL_CC6:
290 		seq_puts(m, "RC6\n");
291 		break;
292 	default:
293 		MISSING_CASE(REG_FIELD_GET(MTL_CC_MASK, gt_core_status));
294 		seq_puts(m, "Unknown\n");
295 		break;
296 	}
297 
298 	seq_printf(m, "Multi-threaded Forcewake Request: 0x%x\n", mt_fwake_req);
299 	if (gt->type == GT_MEDIA)
300 		seq_printf(m, "Media Power Well: %s\n",
301 			   (mtl_powergate_status &
302 			    GEN9_PWRGT_MEDIA_STATUS_MASK) ? "Up" : "Down");
303 	else
304 		seq_printf(m, "Render Power Well: %s\n",
305 			   (mtl_powergate_status &
306 			    GEN9_PWRGT_RENDER_STATUS_MASK) ? "Up" : "Down");
307 
308 	/* Works for both render and media gt's */
309 	intel_rc6_print_residency(m, "RC6 residency since boot:", INTEL_RC6_RES_RC6);
310 
311 	return fw_domains_show(m, NULL);
312 }
313 
314 static int drpc_show(struct seq_file *m, void *unused)
315 {
316 	struct intel_gt *gt = m->private;
317 	struct drm_i915_private *i915 = gt->i915;
318 	intel_wakeref_t wakeref;
319 	int err = -ENODEV;
320 
321 	with_intel_runtime_pm(gt->uncore->rpm, wakeref) {
322 		if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70))
323 			err = mtl_drpc(m);
324 		else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
325 			err = vlv_drpc(m);
326 		else if (GRAPHICS_VER(i915) >= 6)
327 			err = gen6_drpc(m);
328 		else
329 			err = ilk_drpc(m);
330 	}
331 
332 	return err;
333 }
334 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(drpc);
335 
336 void intel_gt_pm_frequency_dump(struct intel_gt *gt, struct drm_printer *p)
337 {
338 	struct drm_i915_private *i915 = gt->i915;
339 	struct intel_uncore *uncore = gt->uncore;
340 	struct intel_rps *rps = &gt->rps;
341 	intel_wakeref_t wakeref;
342 
343 	wakeref = intel_runtime_pm_get(uncore->rpm);
344 
345 	if (GRAPHICS_VER(i915) == 5) {
346 		u16 rgvswctl = intel_uncore_read16(uncore, MEMSWCTL);
347 		u16 rgvstat = intel_uncore_read16(uncore, MEMSTAT_ILK);
348 
349 		drm_printf(p, "Requested P-state: %d\n", (rgvswctl >> 8) & 0xf);
350 		drm_printf(p, "Requested VID: %d\n", rgvswctl & 0x3f);
351 		drm_printf(p, "Current VID: %d\n", (rgvstat & MEMSTAT_VID_MASK) >>
352 			   MEMSTAT_VID_SHIFT);
353 		drm_printf(p, "Current P-state: %d\n",
354 			   REG_FIELD_GET(MEMSTAT_PSTATE_MASK, rgvstat));
355 	} else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
356 		u32 rpmodectl, freq_sts;
357 
358 		rpmodectl = intel_uncore_read(uncore, GEN6_RP_CONTROL);
359 		drm_printf(p, "Video Turbo Mode: %s\n",
360 			   str_yes_no(rpmodectl & GEN6_RP_MEDIA_TURBO));
361 		drm_printf(p, "HW control enabled: %s\n",
362 			   str_yes_no(rpmodectl & GEN6_RP_ENABLE));
363 		drm_printf(p, "SW control enabled: %s\n",
364 			   str_yes_no((rpmodectl & GEN6_RP_MEDIA_MODE_MASK) == GEN6_RP_MEDIA_SW_MODE));
365 
366 		vlv_punit_get(i915);
367 		freq_sts = vlv_punit_read(i915, PUNIT_REG_GPU_FREQ_STS);
368 		vlv_punit_put(i915);
369 
370 		drm_printf(p, "PUNIT_REG_GPU_FREQ_STS: 0x%08x\n", freq_sts);
371 		drm_printf(p, "DDR freq: %d MHz\n", i915->mem_freq);
372 
373 		drm_printf(p, "actual GPU freq: %d MHz\n",
374 			   intel_gpu_freq(rps, (freq_sts >> 8) & 0xff));
375 
376 		drm_printf(p, "current GPU freq: %d MHz\n",
377 			   intel_gpu_freq(rps, rps->cur_freq));
378 
379 		drm_printf(p, "max GPU freq: %d MHz\n",
380 			   intel_gpu_freq(rps, rps->max_freq));
381 
382 		drm_printf(p, "min GPU freq: %d MHz\n",
383 			   intel_gpu_freq(rps, rps->min_freq));
384 
385 		drm_printf(p, "idle GPU freq: %d MHz\n",
386 			   intel_gpu_freq(rps, rps->idle_freq));
387 
388 		drm_printf(p, "efficient (RPe) frequency: %d MHz\n",
389 			   intel_gpu_freq(rps, rps->efficient_freq));
390 	} else if (GRAPHICS_VER(i915) >= 6) {
391 		gen6_rps_frequency_dump(rps, p);
392 	} else {
393 		drm_puts(p, "no P-state info available\n");
394 	}
395 
396 	drm_printf(p, "Current CD clock frequency: %d kHz\n", i915->display.cdclk.hw.cdclk);
397 	drm_printf(p, "Max CD clock frequency: %d kHz\n", i915->display.cdclk.max_cdclk_freq);
398 	drm_printf(p, "Max pixel clock frequency: %d kHz\n", i915->max_dotclk_freq);
399 
400 	intel_runtime_pm_put(uncore->rpm, wakeref);
401 }
402 
403 static int frequency_show(struct seq_file *m, void *unused)
404 {
405 	struct intel_gt *gt = m->private;
406 	struct drm_printer p = drm_seq_file_printer(m);
407 
408 	intel_gt_pm_frequency_dump(gt, &p);
409 
410 	return 0;
411 }
412 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(frequency);
413 
414 static int llc_show(struct seq_file *m, void *data)
415 {
416 	struct intel_gt *gt = m->private;
417 	struct drm_i915_private *i915 = gt->i915;
418 	const bool edram = GRAPHICS_VER(i915) > 8;
419 	struct intel_rps *rps = &gt->rps;
420 	unsigned int max_gpu_freq, min_gpu_freq;
421 	intel_wakeref_t wakeref;
422 	int gpu_freq, ia_freq;
423 
424 	seq_printf(m, "LLC: %s\n", str_yes_no(HAS_LLC(i915)));
425 	seq_printf(m, "%s: %uMB\n", edram ? "eDRAM" : "eLLC",
426 		   i915->edram_size_mb);
427 
428 	min_gpu_freq = rps->min_freq;
429 	max_gpu_freq = rps->max_freq;
430 	if (IS_GEN9_BC(i915) || GRAPHICS_VER(i915) >= 11) {
431 		/* Convert GT frequency to 50 HZ units */
432 		min_gpu_freq /= GEN9_FREQ_SCALER;
433 		max_gpu_freq /= GEN9_FREQ_SCALER;
434 	}
435 
436 	seq_puts(m, "GPU freq (MHz)\tEffective CPU freq (MHz)\tEffective Ring freq (MHz)\n");
437 
438 	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
439 	for (gpu_freq = min_gpu_freq; gpu_freq <= max_gpu_freq; gpu_freq++) {
440 		ia_freq = gpu_freq;
441 		snb_pcode_read(gt->uncore, GEN6_PCODE_READ_MIN_FREQ_TABLE,
442 			       &ia_freq, NULL);
443 		seq_printf(m, "%d\t\t%d\t\t\t\t%d\n",
444 			   intel_gpu_freq(rps,
445 					  (gpu_freq *
446 					   (IS_GEN9_BC(i915) ||
447 					    GRAPHICS_VER(i915) >= 11 ?
448 					    GEN9_FREQ_SCALER : 1))),
449 			   ((ia_freq >> 0) & 0xff) * 100,
450 			   ((ia_freq >> 8) & 0xff) * 100);
451 	}
452 	intel_runtime_pm_put(gt->uncore->rpm, wakeref);
453 
454 	return 0;
455 }
456 
457 static bool llc_eval(void *data)
458 {
459 	struct intel_gt *gt = data;
460 
461 	return HAS_LLC(gt->i915);
462 }
463 
464 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(llc);
465 
466 static const char *rps_power_to_str(unsigned int power)
467 {
468 	static const char * const strings[] = {
469 		[LOW_POWER] = "low power",
470 		[BETWEEN] = "mixed",
471 		[HIGH_POWER] = "high power",
472 	};
473 
474 	if (power >= ARRAY_SIZE(strings) || !strings[power])
475 		return "unknown";
476 
477 	return strings[power];
478 }
479 
480 static int rps_boost_show(struct seq_file *m, void *data)
481 {
482 	struct intel_gt *gt = m->private;
483 	struct drm_i915_private *i915 = gt->i915;
484 	struct intel_rps *rps = &gt->rps;
485 
486 	seq_printf(m, "RPS enabled? %s\n",
487 		   str_yes_no(intel_rps_is_enabled(rps)));
488 	seq_printf(m, "RPS active? %s\n",
489 		   str_yes_no(intel_rps_is_active(rps)));
490 	seq_printf(m, "GPU busy? %s, %llums\n",
491 		   str_yes_no(gt->awake),
492 		   ktime_to_ms(intel_gt_get_awake_time(gt)));
493 	seq_printf(m, "Boosts outstanding? %d\n",
494 		   atomic_read(&rps->num_waiters));
495 	seq_printf(m, "Interactive? %d\n", READ_ONCE(rps->power.interactive));
496 	seq_printf(m, "Frequency requested %d, actual %d\n",
497 		   intel_gpu_freq(rps, rps->cur_freq),
498 		   intel_rps_read_actual_frequency(rps));
499 	seq_printf(m, "  min hard:%d, soft:%d; max soft:%d, hard:%d\n",
500 		   intel_gpu_freq(rps, rps->min_freq),
501 		   intel_gpu_freq(rps, rps->min_freq_softlimit),
502 		   intel_gpu_freq(rps, rps->max_freq_softlimit),
503 		   intel_gpu_freq(rps, rps->max_freq));
504 	seq_printf(m, "  idle:%d, efficient:%d, boost:%d\n",
505 		   intel_gpu_freq(rps, rps->idle_freq),
506 		   intel_gpu_freq(rps, rps->efficient_freq),
507 		   intel_gpu_freq(rps, rps->boost_freq));
508 
509 	seq_printf(m, "Wait boosts: %d\n", READ_ONCE(rps->boosts));
510 
511 	if (GRAPHICS_VER(i915) >= 6 && intel_rps_is_active(rps)) {
512 		struct intel_uncore *uncore = gt->uncore;
513 		u32 rpup, rpupei;
514 		u32 rpdown, rpdownei;
515 
516 		intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
517 		rpup = intel_uncore_read_fw(uncore, GEN6_RP_CUR_UP) & GEN6_RP_EI_MASK;
518 		rpupei = intel_uncore_read_fw(uncore, GEN6_RP_CUR_UP_EI) & GEN6_RP_EI_MASK;
519 		rpdown = intel_uncore_read_fw(uncore, GEN6_RP_CUR_DOWN) & GEN6_RP_EI_MASK;
520 		rpdownei = intel_uncore_read_fw(uncore, GEN6_RP_CUR_DOWN_EI) & GEN6_RP_EI_MASK;
521 		intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
522 
523 		seq_printf(m, "\nRPS Autotuning (current \"%s\" window):\n",
524 			   rps_power_to_str(rps->power.mode));
525 		seq_printf(m, "  Avg. up: %d%% [above threshold? %d%%]\n",
526 			   rpup && rpupei ? 100 * rpup / rpupei : 0,
527 			   rps->power.up_threshold);
528 		seq_printf(m, "  Avg. down: %d%% [below threshold? %d%%]\n",
529 			   rpdown && rpdownei ? 100 * rpdown / rpdownei : 0,
530 			   rps->power.down_threshold);
531 	} else {
532 		seq_puts(m, "\nRPS Autotuning inactive\n");
533 	}
534 
535 	return 0;
536 }
537 
538 static bool rps_eval(void *data)
539 {
540 	struct intel_gt *gt = data;
541 
542 	return HAS_RPS(gt->i915);
543 }
544 
545 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(rps_boost);
546 
547 static int perf_limit_reasons_get(void *data, u64 *val)
548 {
549 	struct intel_gt *gt = data;
550 	intel_wakeref_t wakeref;
551 
552 	with_intel_runtime_pm(gt->uncore->rpm, wakeref)
553 		*val = intel_uncore_read(gt->uncore, intel_gt_perf_limit_reasons_reg(gt));
554 
555 	return 0;
556 }
557 
558 static int perf_limit_reasons_clear(void *data, u64 val)
559 {
560 	struct intel_gt *gt = data;
561 	intel_wakeref_t wakeref;
562 
563 	/*
564 	 * Clear the upper 16 "log" bits, the lower 16 "status" bits are
565 	 * read-only. The upper 16 "log" bits are identical to the lower 16
566 	 * "status" bits except that the "log" bits remain set until cleared.
567 	 */
568 	with_intel_runtime_pm(gt->uncore->rpm, wakeref)
569 		intel_uncore_rmw(gt->uncore, intel_gt_perf_limit_reasons_reg(gt),
570 				 GT0_PERF_LIMIT_REASONS_LOG_MASK, 0);
571 
572 	return 0;
573 }
574 
575 static bool perf_limit_reasons_eval(void *data)
576 {
577 	struct intel_gt *gt = data;
578 
579 	return i915_mmio_reg_valid(intel_gt_perf_limit_reasons_reg(gt));
580 }
581 
582 DEFINE_SIMPLE_ATTRIBUTE(perf_limit_reasons_fops, perf_limit_reasons_get,
583 			perf_limit_reasons_clear, "%llu\n");
584 
585 void intel_gt_pm_debugfs_register(struct intel_gt *gt, struct dentry *root)
586 {
587 	static const struct intel_gt_debugfs_file files[] = {
588 		{ "drpc", &drpc_fops, NULL },
589 		{ "frequency", &frequency_fops, NULL },
590 		{ "forcewake", &fw_domains_fops, NULL },
591 		{ "forcewake_user", &forcewake_user_fops, NULL},
592 		{ "llc", &llc_fops, llc_eval },
593 		{ "rps_boost", &rps_boost_fops, rps_eval },
594 		{ "perf_limit_reasons", &perf_limit_reasons_fops, perf_limit_reasons_eval },
595 	};
596 
597 	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
598 }
599