2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Ben Widawsky <ben@bwidawsk.net>
28 #include <linux/device.h>
29 #include <linux/module.h>
30 #include <linux/stat.h>
31 #include <linux/sysfs.h>
32 #include "intel_drv.h"
35 static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev)
37 struct drm_minor *minor = dev_get_drvdata(kdev);
38 return to_i915(minor->dev);
42 static u32 calc_residency(struct drm_i915_private *dev_priv,
45 u64 raw_time; /* 32b value may overflow during fixed point math */
46 u64 units = 128ULL, div = 100000ULL;
49 if (!intel_enable_rc6())
52 intel_runtime_pm_get(dev_priv);
54 /* On VLV and CHV, residency time is in CZ units rather than 1.28us */
55 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
57 div = dev_priv->czclk_freq;
59 if (I915_READ(VLV_COUNTER_CONTROL) & VLV_COUNT_RANGE_HIGH)
61 } else if (IS_BROXTON(dev_priv)) {
63 div = 1200; /* 833.33ns */
66 raw_time = I915_READ(reg) * units;
67 ret = DIV_ROUND_UP_ULL(raw_time, div);
69 intel_runtime_pm_put(dev_priv);
74 show_rc6_mask(struct device *kdev, struct device_attribute *attr, char *buf)
76 return snprintf(buf, PAGE_SIZE, "%x\n", intel_enable_rc6());
80 show_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf)
82 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
83 u32 rc6_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6);
84 return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency);
88 show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf)
90 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
91 u32 rc6p_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6p);
92 return snprintf(buf, PAGE_SIZE, "%u\n", rc6p_residency);
96 show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf)
98 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
99 u32 rc6pp_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6pp);
100 return snprintf(buf, PAGE_SIZE, "%u\n", rc6pp_residency);
104 show_media_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf)
106 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
107 u32 rc6_residency = calc_residency(dev_priv, VLV_GT_MEDIA_RC6);
108 return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency);
111 static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
112 static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
113 static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
114 static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
115 static DEVICE_ATTR(media_rc6_residency_ms, S_IRUGO, show_media_rc6_ms, NULL);
117 static struct attribute *rc6_attrs[] = {
118 &dev_attr_rc6_enable.attr,
119 &dev_attr_rc6_residency_ms.attr,
123 static struct attribute_group rc6_attr_group = {
124 .name = power_group_name,
128 static struct attribute *rc6p_attrs[] = {
129 &dev_attr_rc6p_residency_ms.attr,
130 &dev_attr_rc6pp_residency_ms.attr,
134 static struct attribute_group rc6p_attr_group = {
135 .name = power_group_name,
139 static struct attribute *media_rc6_attrs[] = {
140 &dev_attr_media_rc6_residency_ms.attr,
144 static struct attribute_group media_rc6_attr_group = {
145 .name = power_group_name,
146 .attrs = media_rc6_attrs
150 static int l3_access_valid(struct drm_i915_private *dev_priv, loff_t offset)
152 if (!HAS_L3_DPF(dev_priv))
158 if (offset >= GEN7_L3LOG_SIZE)
165 i915_l3_read(struct file *filp, struct kobject *kobj,
166 struct bin_attribute *attr, char *buf,
167 loff_t offset, size_t count)
169 struct device *kdev = kobj_to_dev(kobj);
170 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
171 struct drm_device *dev = &dev_priv->drm;
172 int slice = (int)(uintptr_t)attr->private;
175 count = round_down(count, 4);
177 ret = l3_access_valid(dev_priv, offset);
181 count = min_t(size_t, GEN7_L3LOG_SIZE - offset, count);
183 ret = i915_mutex_lock_interruptible(dev);
187 if (dev_priv->l3_parity.remap_info[slice])
189 dev_priv->l3_parity.remap_info[slice] + (offset/4),
192 memset(buf, 0, count);
194 mutex_unlock(&dev->struct_mutex);
200 i915_l3_write(struct file *filp, struct kobject *kobj,
201 struct bin_attribute *attr, char *buf,
202 loff_t offset, size_t count)
204 struct device *kdev = kobj_to_dev(kobj);
205 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
206 struct drm_device *dev = &dev_priv->drm;
207 struct i915_gem_context *ctx;
208 u32 *temp = NULL; /* Just here to make handling failures easy */
209 int slice = (int)(uintptr_t)attr->private;
212 if (!HAS_HW_CONTEXTS(dev_priv))
215 ret = l3_access_valid(dev_priv, offset);
219 ret = i915_mutex_lock_interruptible(dev);
223 if (!dev_priv->l3_parity.remap_info[slice]) {
224 temp = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL);
226 mutex_unlock(&dev->struct_mutex);
231 /* TODO: Ideally we really want a GPU reset here to make sure errors
232 * aren't propagated. Since I cannot find a stable way to reset the GPU
233 * at this point it is left as a TODO.
236 dev_priv->l3_parity.remap_info[slice] = temp;
238 memcpy(dev_priv->l3_parity.remap_info[slice] + (offset/4), buf, count);
240 /* NB: We defer the remapping until we switch to the context */
241 list_for_each_entry(ctx, &dev_priv->context_list, link)
242 ctx->remap_slice |= (1<<slice);
244 mutex_unlock(&dev->struct_mutex);
249 static struct bin_attribute dpf_attrs = {
250 .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)},
251 .size = GEN7_L3LOG_SIZE,
252 .read = i915_l3_read,
253 .write = i915_l3_write,
258 static struct bin_attribute dpf_attrs_1 = {
259 .attr = {.name = "l3_parity_slice_1", .mode = (S_IRUSR | S_IWUSR)},
260 .size = GEN7_L3LOG_SIZE,
261 .read = i915_l3_read,
262 .write = i915_l3_write,
267 static ssize_t gt_act_freq_mhz_show(struct device *kdev,
268 struct device_attribute *attr, char *buf)
270 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
273 intel_runtime_pm_get(dev_priv);
275 mutex_lock(&dev_priv->rps.hw_lock);
276 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
278 freq = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
279 ret = intel_gpu_freq(dev_priv, (freq >> 8) & 0xff);
281 u32 rpstat = I915_READ(GEN6_RPSTAT1);
282 if (IS_GEN9(dev_priv))
283 ret = (rpstat & GEN9_CAGF_MASK) >> GEN9_CAGF_SHIFT;
284 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
285 ret = (rpstat & HSW_CAGF_MASK) >> HSW_CAGF_SHIFT;
287 ret = (rpstat & GEN6_CAGF_MASK) >> GEN6_CAGF_SHIFT;
288 ret = intel_gpu_freq(dev_priv, ret);
290 mutex_unlock(&dev_priv->rps.hw_lock);
292 intel_runtime_pm_put(dev_priv);
294 return snprintf(buf, PAGE_SIZE, "%d\n", ret);
297 static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
298 struct device_attribute *attr, char *buf)
300 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
302 return snprintf(buf, PAGE_SIZE, "%d\n",
303 intel_gpu_freq(dev_priv,
304 dev_priv->rps.cur_freq));
307 static ssize_t gt_boost_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
309 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
311 return snprintf(buf, PAGE_SIZE, "%d\n",
312 intel_gpu_freq(dev_priv,
313 dev_priv->rps.boost_freq));
316 static ssize_t gt_boost_freq_mhz_store(struct device *kdev,
317 struct device_attribute *attr,
318 const char *buf, size_t count)
320 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
324 ret = kstrtou32(buf, 0, &val);
328 /* Validate against (static) hardware limits */
329 val = intel_freq_opcode(dev_priv, val);
330 if (val < dev_priv->rps.min_freq || val > dev_priv->rps.max_freq)
333 mutex_lock(&dev_priv->rps.hw_lock);
334 dev_priv->rps.boost_freq = val;
335 mutex_unlock(&dev_priv->rps.hw_lock);
340 static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev,
341 struct device_attribute *attr, char *buf)
343 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
345 return snprintf(buf, PAGE_SIZE, "%d\n",
346 intel_gpu_freq(dev_priv,
347 dev_priv->rps.efficient_freq));
350 static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
352 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
354 return snprintf(buf, PAGE_SIZE, "%d\n",
355 intel_gpu_freq(dev_priv,
356 dev_priv->rps.max_freq_softlimit));
359 static ssize_t gt_max_freq_mhz_store(struct device *kdev,
360 struct device_attribute *attr,
361 const char *buf, size_t count)
363 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
367 ret = kstrtou32(buf, 0, &val);
371 intel_runtime_pm_get(dev_priv);
373 mutex_lock(&dev_priv->rps.hw_lock);
375 val = intel_freq_opcode(dev_priv, val);
377 if (val < dev_priv->rps.min_freq ||
378 val > dev_priv->rps.max_freq ||
379 val < dev_priv->rps.min_freq_softlimit) {
380 mutex_unlock(&dev_priv->rps.hw_lock);
381 intel_runtime_pm_put(dev_priv);
385 if (val > dev_priv->rps.rp0_freq)
386 DRM_DEBUG("User requested overclocking to %d\n",
387 intel_gpu_freq(dev_priv, val));
389 dev_priv->rps.max_freq_softlimit = val;
391 val = clamp_t(int, dev_priv->rps.cur_freq,
392 dev_priv->rps.min_freq_softlimit,
393 dev_priv->rps.max_freq_softlimit);
395 /* We still need *_set_rps to process the new max_delay and
396 * update the interrupt limits and PMINTRMSK even though
397 * frequency request may be unchanged. */
398 intel_set_rps(dev_priv, val);
400 mutex_unlock(&dev_priv->rps.hw_lock);
402 intel_runtime_pm_put(dev_priv);
407 static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
409 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
411 return snprintf(buf, PAGE_SIZE, "%d\n",
412 intel_gpu_freq(dev_priv,
413 dev_priv->rps.min_freq_softlimit));
416 static ssize_t gt_min_freq_mhz_store(struct device *kdev,
417 struct device_attribute *attr,
418 const char *buf, size_t count)
420 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
424 ret = kstrtou32(buf, 0, &val);
428 intel_runtime_pm_get(dev_priv);
430 mutex_lock(&dev_priv->rps.hw_lock);
432 val = intel_freq_opcode(dev_priv, val);
434 if (val < dev_priv->rps.min_freq ||
435 val > dev_priv->rps.max_freq ||
436 val > dev_priv->rps.max_freq_softlimit) {
437 mutex_unlock(&dev_priv->rps.hw_lock);
438 intel_runtime_pm_put(dev_priv);
442 dev_priv->rps.min_freq_softlimit = val;
444 val = clamp_t(int, dev_priv->rps.cur_freq,
445 dev_priv->rps.min_freq_softlimit,
446 dev_priv->rps.max_freq_softlimit);
448 /* We still need *_set_rps to process the new min_delay and
449 * update the interrupt limits and PMINTRMSK even though
450 * frequency request may be unchanged. */
451 intel_set_rps(dev_priv, val);
453 mutex_unlock(&dev_priv->rps.hw_lock);
455 intel_runtime_pm_put(dev_priv);
461 static DEVICE_ATTR(gt_act_freq_mhz, S_IRUGO, gt_act_freq_mhz_show, NULL);
462 static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL);
463 static DEVICE_ATTR(gt_boost_freq_mhz, S_IRUGO | S_IWUSR, gt_boost_freq_mhz_show, gt_boost_freq_mhz_store);
464 static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store);
465 static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store);
467 static DEVICE_ATTR(vlv_rpe_freq_mhz, S_IRUGO, vlv_rpe_freq_mhz_show, NULL);
469 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf);
470 static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
471 static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
472 static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
474 /* For now we have a static number of RP states */
475 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
477 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
480 if (attr == &dev_attr_gt_RP0_freq_mhz)
481 val = intel_gpu_freq(dev_priv, dev_priv->rps.rp0_freq);
482 else if (attr == &dev_attr_gt_RP1_freq_mhz)
483 val = intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq);
484 else if (attr == &dev_attr_gt_RPn_freq_mhz)
485 val = intel_gpu_freq(dev_priv, dev_priv->rps.min_freq);
489 return snprintf(buf, PAGE_SIZE, "%d\n", val);
492 static const struct attribute *gen6_attrs[] = {
493 &dev_attr_gt_act_freq_mhz.attr,
494 &dev_attr_gt_cur_freq_mhz.attr,
495 &dev_attr_gt_boost_freq_mhz.attr,
496 &dev_attr_gt_max_freq_mhz.attr,
497 &dev_attr_gt_min_freq_mhz.attr,
498 &dev_attr_gt_RP0_freq_mhz.attr,
499 &dev_attr_gt_RP1_freq_mhz.attr,
500 &dev_attr_gt_RPn_freq_mhz.attr,
504 static const struct attribute *vlv_attrs[] = {
505 &dev_attr_gt_act_freq_mhz.attr,
506 &dev_attr_gt_cur_freq_mhz.attr,
507 &dev_attr_gt_boost_freq_mhz.attr,
508 &dev_attr_gt_max_freq_mhz.attr,
509 &dev_attr_gt_min_freq_mhz.attr,
510 &dev_attr_gt_RP0_freq_mhz.attr,
511 &dev_attr_gt_RP1_freq_mhz.attr,
512 &dev_attr_gt_RPn_freq_mhz.attr,
513 &dev_attr_vlv_rpe_freq_mhz.attr,
517 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
519 static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
520 struct bin_attribute *attr, char *buf,
521 loff_t off, size_t count)
524 struct device *kdev = kobj_to_dev(kobj);
525 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
526 struct drm_device *dev = &dev_priv->drm;
527 struct i915_error_state_file_priv error_priv;
528 struct drm_i915_error_state_buf error_str;
529 ssize_t ret_count = 0;
532 memset(&error_priv, 0, sizeof(error_priv));
534 ret = i915_error_state_buf_init(&error_str, to_i915(dev), count, off);
538 error_priv.dev = dev;
539 i915_error_state_get(dev, &error_priv);
541 ret = i915_error_state_to_str(&error_str, &error_priv);
545 ret_count = count < error_str.bytes ? count : error_str.bytes;
547 memcpy(buf, error_str.buf, ret_count);
549 i915_error_state_put(&error_priv);
550 i915_error_state_buf_release(&error_str);
552 return ret ?: ret_count;
555 static ssize_t error_state_write(struct file *file, struct kobject *kobj,
556 struct bin_attribute *attr, char *buf,
557 loff_t off, size_t count)
559 struct device *kdev = kobj_to_dev(kobj);
560 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
562 DRM_DEBUG_DRIVER("Resetting error state\n");
563 i915_destroy_error_state(&dev_priv->drm);
568 static struct bin_attribute error_state_attr = {
569 .attr.name = "error",
570 .attr.mode = S_IRUSR | S_IWUSR,
572 .read = error_state_read,
573 .write = error_state_write,
576 static void i915_setup_error_capture(struct device *kdev)
578 if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr))
579 DRM_ERROR("error_state sysfs setup failed\n");
582 static void i915_teardown_error_capture(struct device *kdev)
584 sysfs_remove_bin_file(&kdev->kobj, &error_state_attr);
587 static void i915_setup_error_capture(struct device *kdev) {}
588 static void i915_teardown_error_capture(struct device *kdev) {}
591 void i915_setup_sysfs(struct drm_i915_private *dev_priv)
593 struct device *kdev = dev_priv->drm.primary->kdev;
597 if (HAS_RC6(dev_priv)) {
598 ret = sysfs_merge_group(&kdev->kobj,
601 DRM_ERROR("RC6 residency sysfs setup failed\n");
603 if (HAS_RC6p(dev_priv)) {
604 ret = sysfs_merge_group(&kdev->kobj,
607 DRM_ERROR("RC6p residency sysfs setup failed\n");
609 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
610 ret = sysfs_merge_group(&kdev->kobj,
611 &media_rc6_attr_group);
613 DRM_ERROR("Media RC6 residency sysfs setup failed\n");
616 if (HAS_L3_DPF(dev_priv)) {
617 ret = device_create_bin_file(kdev, &dpf_attrs);
619 DRM_ERROR("l3 parity sysfs setup failed\n");
621 if (NUM_L3_SLICES(dev_priv) > 1) {
622 ret = device_create_bin_file(kdev,
625 DRM_ERROR("l3 parity slice 1 setup failed\n");
630 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
631 ret = sysfs_create_files(&kdev->kobj, vlv_attrs);
632 else if (INTEL_GEN(dev_priv) >= 6)
633 ret = sysfs_create_files(&kdev->kobj, gen6_attrs);
635 DRM_ERROR("RPS sysfs setup failed\n");
637 i915_setup_error_capture(kdev);
640 void i915_teardown_sysfs(struct drm_i915_private *dev_priv)
642 struct device *kdev = dev_priv->drm.primary->kdev;
644 i915_teardown_error_capture(kdev);
646 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
647 sysfs_remove_files(&kdev->kobj, vlv_attrs);
649 sysfs_remove_files(&kdev->kobj, gen6_attrs);
650 device_remove_bin_file(kdev, &dpf_attrs_1);
651 device_remove_bin_file(kdev, &dpf_attrs);
653 sysfs_unmerge_group(&kdev->kobj, &rc6_attr_group);
654 sysfs_unmerge_group(&kdev->kobj, &rc6p_attr_group);