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>
33 #include "gt/intel_rc6.h"
34 #include "gt/intel_rps.h"
35 #include "gt/sysfs_engines.h"
38 #include "i915_sysfs.h"
40 #include "intel_sideband.h"
42 static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev)
44 struct drm_minor *minor = dev_get_drvdata(kdev);
45 return to_i915(minor->dev);
49 static u32 calc_residency(struct drm_i915_private *dev_priv,
52 intel_wakeref_t wakeref;
55 with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref)
56 res = intel_rc6_residency_us(&dev_priv->gt.rc6, reg);
58 return DIV_ROUND_CLOSEST_ULL(res, 1000);
61 static ssize_t rc6_enable_show(struct device *kdev,
62 struct device_attribute *attr, char *buf)
64 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
68 if (HAS_RC6(dev_priv))
70 if (HAS_RC6p(dev_priv))
72 if (HAS_RC6pp(dev_priv))
75 return sysfs_emit(buf, "%x\n", mask);
78 static ssize_t rc6_residency_ms_show(struct device *kdev,
79 struct device_attribute *attr, char *buf)
81 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
82 u32 rc6_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6);
83 return sysfs_emit(buf, "%u\n", rc6_residency);
86 static ssize_t rc6p_residency_ms_show(struct device *kdev,
87 struct device_attribute *attr, char *buf)
89 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
90 u32 rc6p_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6p);
91 return sysfs_emit(buf, "%u\n", rc6p_residency);
94 static ssize_t rc6pp_residency_ms_show(struct device *kdev,
95 struct device_attribute *attr, char *buf)
97 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
98 u32 rc6pp_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6pp);
99 return sysfs_emit(buf, "%u\n", rc6pp_residency);
102 static ssize_t media_rc6_residency_ms_show(struct device *kdev,
103 struct device_attribute *attr, char *buf)
105 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
106 u32 rc6_residency = calc_residency(dev_priv, VLV_GT_MEDIA_RC6);
107 return sysfs_emit(buf, "%u\n", rc6_residency);
110 static DEVICE_ATTR_RO(rc6_enable);
111 static DEVICE_ATTR_RO(rc6_residency_ms);
112 static DEVICE_ATTR_RO(rc6p_residency_ms);
113 static DEVICE_ATTR_RO(rc6pp_residency_ms);
114 static DEVICE_ATTR_RO(media_rc6_residency_ms);
116 static struct attribute *rc6_attrs[] = {
117 &dev_attr_rc6_enable.attr,
118 &dev_attr_rc6_residency_ms.attr,
122 static const struct attribute_group rc6_attr_group = {
123 .name = power_group_name,
127 static struct attribute *rc6p_attrs[] = {
128 &dev_attr_rc6p_residency_ms.attr,
129 &dev_attr_rc6pp_residency_ms.attr,
133 static const struct attribute_group rc6p_attr_group = {
134 .name = power_group_name,
138 static struct attribute *media_rc6_attrs[] = {
139 &dev_attr_media_rc6_residency_ms.attr,
143 static const struct attribute_group media_rc6_attr_group = {
144 .name = power_group_name,
145 .attrs = media_rc6_attrs
149 static int l3_access_valid(struct drm_i915_private *i915, loff_t offset)
151 if (!HAS_L3_DPF(i915))
154 if (!IS_ALIGNED(offset, sizeof(u32)))
157 if (offset >= GEN7_L3LOG_SIZE)
164 i915_l3_read(struct file *filp, struct kobject *kobj,
165 struct bin_attribute *attr, char *buf,
166 loff_t offset, size_t count)
168 struct device *kdev = kobj_to_dev(kobj);
169 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
170 int slice = (int)(uintptr_t)attr->private;
173 ret = l3_access_valid(i915, offset);
177 count = round_down(count, sizeof(u32));
178 count = min_t(size_t, GEN7_L3LOG_SIZE - offset, count);
179 memset(buf, 0, count);
181 spin_lock(&i915->gem.contexts.lock);
182 if (i915->l3_parity.remap_info[slice])
184 i915->l3_parity.remap_info[slice] + offset / sizeof(u32),
186 spin_unlock(&i915->gem.contexts.lock);
192 i915_l3_write(struct file *filp, struct kobject *kobj,
193 struct bin_attribute *attr, char *buf,
194 loff_t offset, size_t count)
196 struct device *kdev = kobj_to_dev(kobj);
197 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
198 int slice = (int)(uintptr_t)attr->private;
199 u32 *remap_info, *freeme = NULL;
200 struct i915_gem_context *ctx;
203 ret = l3_access_valid(i915, offset);
207 if (count < sizeof(u32))
210 remap_info = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL);
214 spin_lock(&i915->gem.contexts.lock);
216 if (i915->l3_parity.remap_info[slice]) {
218 remap_info = i915->l3_parity.remap_info[slice];
220 i915->l3_parity.remap_info[slice] = remap_info;
223 count = round_down(count, sizeof(u32));
224 memcpy(remap_info + offset / sizeof(u32), buf, count);
226 /* NB: We defer the remapping until we switch to the context */
227 list_for_each_entry(ctx, &i915->gem.contexts.list, link)
228 ctx->remap_slice |= BIT(slice);
230 spin_unlock(&i915->gem.contexts.lock);
234 * TODO: Ideally we really want a GPU reset here to make sure errors
235 * aren't propagated. Since I cannot find a stable way to reset the GPU
236 * at this point it is left as a TODO.
242 static const struct bin_attribute dpf_attrs = {
243 .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)},
244 .size = GEN7_L3LOG_SIZE,
245 .read = i915_l3_read,
246 .write = i915_l3_write,
251 static const struct bin_attribute dpf_attrs_1 = {
252 .attr = {.name = "l3_parity_slice_1", .mode = (S_IRUSR | S_IWUSR)},
253 .size = GEN7_L3LOG_SIZE,
254 .read = i915_l3_read,
255 .write = i915_l3_write,
260 static ssize_t gt_act_freq_mhz_show(struct device *kdev,
261 struct device_attribute *attr, char *buf)
263 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
264 struct intel_rps *rps = &i915->gt.rps;
266 return sysfs_emit(buf, "%d\n", intel_rps_read_actual_frequency(rps));
269 static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
270 struct device_attribute *attr, char *buf)
272 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
273 struct intel_rps *rps = &i915->gt.rps;
275 return sysfs_emit(buf, "%d\n", intel_rps_get_requested_frequency(rps));
278 static ssize_t gt_boost_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
280 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
281 struct intel_rps *rps = &i915->gt.rps;
283 return sysfs_emit(buf, "%d\n", intel_gpu_freq(rps, rps->boost_freq));
286 static ssize_t gt_boost_freq_mhz_store(struct device *kdev,
287 struct device_attribute *attr,
288 const char *buf, size_t count)
290 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
291 struct intel_rps *rps = &dev_priv->gt.rps;
296 ret = kstrtou32(buf, 0, &val);
300 /* Validate against (static) hardware limits */
301 val = intel_freq_opcode(rps, val);
302 if (val < rps->min_freq || val > rps->max_freq)
305 mutex_lock(&rps->lock);
306 if (val != rps->boost_freq) {
307 rps->boost_freq = val;
308 boost = atomic_read(&rps->num_waiters);
310 mutex_unlock(&rps->lock);
312 schedule_work(&rps->work);
317 static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev,
318 struct device_attribute *attr, char *buf)
320 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
321 struct intel_rps *rps = &dev_priv->gt.rps;
323 return sysfs_emit(buf, "%d\n", intel_gpu_freq(rps, rps->efficient_freq));
326 static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
328 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
329 struct intel_gt *gt = &dev_priv->gt;
330 struct intel_rps *rps = >->rps;
332 return sysfs_emit(buf, "%d\n", intel_rps_get_max_frequency(rps));
335 static ssize_t gt_max_freq_mhz_store(struct device *kdev,
336 struct device_attribute *attr,
337 const char *buf, size_t count)
339 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
340 struct intel_gt *gt = &dev_priv->gt;
341 struct intel_rps *rps = >->rps;
345 ret = kstrtou32(buf, 0, &val);
349 ret = intel_rps_set_max_frequency(rps, val);
354 static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
356 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
357 struct intel_gt *gt = &i915->gt;
358 struct intel_rps *rps = >->rps;
360 return sysfs_emit(buf, "%d\n", intel_rps_get_min_frequency(rps));
363 static ssize_t gt_min_freq_mhz_store(struct device *kdev,
364 struct device_attribute *attr,
365 const char *buf, size_t count)
367 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
368 struct intel_rps *rps = &i915->gt.rps;
372 ret = kstrtou32(buf, 0, &val);
376 ret = intel_rps_set_min_frequency(rps, val);
381 static DEVICE_ATTR_RO(gt_act_freq_mhz);
382 static DEVICE_ATTR_RO(gt_cur_freq_mhz);
383 static DEVICE_ATTR_RW(gt_boost_freq_mhz);
384 static DEVICE_ATTR_RW(gt_max_freq_mhz);
385 static DEVICE_ATTR_RW(gt_min_freq_mhz);
387 static DEVICE_ATTR_RO(vlv_rpe_freq_mhz);
389 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf);
390 static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
391 static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
392 static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
394 /* For now we have a static number of RP states */
395 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
397 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
398 struct intel_rps *rps = &dev_priv->gt.rps;
401 if (attr == &dev_attr_gt_RP0_freq_mhz)
402 val = intel_rps_get_rp0_frequency(rps);
403 else if (attr == &dev_attr_gt_RP1_freq_mhz)
404 val = intel_rps_get_rp1_frequency(rps);
405 else if (attr == &dev_attr_gt_RPn_freq_mhz)
406 val = intel_rps_get_rpn_frequency(rps);
410 return sysfs_emit(buf, "%d\n", val);
413 static const struct attribute * const gen6_attrs[] = {
414 &dev_attr_gt_act_freq_mhz.attr,
415 &dev_attr_gt_cur_freq_mhz.attr,
416 &dev_attr_gt_boost_freq_mhz.attr,
417 &dev_attr_gt_max_freq_mhz.attr,
418 &dev_attr_gt_min_freq_mhz.attr,
419 &dev_attr_gt_RP0_freq_mhz.attr,
420 &dev_attr_gt_RP1_freq_mhz.attr,
421 &dev_attr_gt_RPn_freq_mhz.attr,
425 static const struct attribute * const vlv_attrs[] = {
426 &dev_attr_gt_act_freq_mhz.attr,
427 &dev_attr_gt_cur_freq_mhz.attr,
428 &dev_attr_gt_boost_freq_mhz.attr,
429 &dev_attr_gt_max_freq_mhz.attr,
430 &dev_attr_gt_min_freq_mhz.attr,
431 &dev_attr_gt_RP0_freq_mhz.attr,
432 &dev_attr_gt_RP1_freq_mhz.attr,
433 &dev_attr_gt_RPn_freq_mhz.attr,
434 &dev_attr_vlv_rpe_freq_mhz.attr,
438 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
440 static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
441 struct bin_attribute *attr, char *buf,
442 loff_t off, size_t count)
445 struct device *kdev = kobj_to_dev(kobj);
446 struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
447 struct i915_gpu_coredump *gpu;
450 gpu = i915_first_error_state(i915);
454 ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count);
455 i915_gpu_coredump_put(gpu);
457 const char *str = "No error state collected\n";
458 size_t len = strlen(str);
460 ret = min_t(size_t, count, len - off);
461 memcpy(buf, str + off, ret);
467 static ssize_t error_state_write(struct file *file, struct kobject *kobj,
468 struct bin_attribute *attr, char *buf,
469 loff_t off, size_t count)
471 struct device *kdev = kobj_to_dev(kobj);
472 struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
474 drm_dbg(&dev_priv->drm, "Resetting error state\n");
475 i915_reset_error_state(dev_priv);
480 static const struct bin_attribute error_state_attr = {
481 .attr.name = "error",
482 .attr.mode = S_IRUSR | S_IWUSR,
484 .read = error_state_read,
485 .write = error_state_write,
488 static void i915_setup_error_capture(struct device *kdev)
490 if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr))
491 DRM_ERROR("error_state sysfs setup failed\n");
494 static void i915_teardown_error_capture(struct device *kdev)
496 sysfs_remove_bin_file(&kdev->kobj, &error_state_attr);
499 static void i915_setup_error_capture(struct device *kdev) {}
500 static void i915_teardown_error_capture(struct device *kdev) {}
503 void i915_setup_sysfs(struct drm_i915_private *dev_priv)
505 struct device *kdev = dev_priv->drm.primary->kdev;
509 if (HAS_RC6(dev_priv)) {
510 ret = sysfs_merge_group(&kdev->kobj,
513 drm_err(&dev_priv->drm,
514 "RC6 residency sysfs setup failed\n");
516 if (HAS_RC6p(dev_priv)) {
517 ret = sysfs_merge_group(&kdev->kobj,
520 drm_err(&dev_priv->drm,
521 "RC6p residency sysfs setup failed\n");
523 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
524 ret = sysfs_merge_group(&kdev->kobj,
525 &media_rc6_attr_group);
527 drm_err(&dev_priv->drm,
528 "Media RC6 residency sysfs setup failed\n");
531 if (HAS_L3_DPF(dev_priv)) {
532 ret = device_create_bin_file(kdev, &dpf_attrs);
534 drm_err(&dev_priv->drm,
535 "l3 parity sysfs setup failed\n");
537 if (NUM_L3_SLICES(dev_priv) > 1) {
538 ret = device_create_bin_file(kdev,
541 drm_err(&dev_priv->drm,
542 "l3 parity slice 1 setup failed\n");
547 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
548 ret = sysfs_create_files(&kdev->kobj, vlv_attrs);
549 else if (GRAPHICS_VER(dev_priv) >= 6)
550 ret = sysfs_create_files(&kdev->kobj, gen6_attrs);
552 drm_err(&dev_priv->drm, "RPS sysfs setup failed\n");
554 i915_setup_error_capture(kdev);
556 intel_engines_add_sysfs(dev_priv);
559 void i915_teardown_sysfs(struct drm_i915_private *dev_priv)
561 struct device *kdev = dev_priv->drm.primary->kdev;
563 i915_teardown_error_capture(kdev);
565 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
566 sysfs_remove_files(&kdev->kobj, vlv_attrs);
568 sysfs_remove_files(&kdev->kobj, gen6_attrs);
569 device_remove_bin_file(kdev, &dpf_attrs_1);
570 device_remove_bin_file(kdev, &dpf_attrs);
572 sysfs_unmerge_group(&kdev->kobj, &rc6_attr_group);
573 sysfs_unmerge_group(&kdev->kobj, &rc6p_attr_group);