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"
36 static u32 calc_residency(struct drm_device *dev, const u32 reg)
38 struct drm_i915_private *dev_priv = dev->dev_private;
39 u64 raw_time; /* 32b value may overflow during fixed point math */
41 if (!intel_enable_rc6(dev))
44 raw_time = I915_READ(reg) * 128ULL;
45 return DIV_ROUND_UP_ULL(raw_time, 100000);
49 show_rc6_mask(struct device *kdev, struct device_attribute *attr, char *buf)
51 struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev);
52 return snprintf(buf, PAGE_SIZE, "%x\n", intel_enable_rc6(dminor->dev));
56 show_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf)
58 struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev);
59 u32 rc6_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6);
60 return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency);
64 show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf)
66 struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev);
67 u32 rc6p_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6p);
68 return snprintf(buf, PAGE_SIZE, "%u\n", rc6p_residency);
72 show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf)
74 struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev);
75 u32 rc6pp_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6pp);
76 return snprintf(buf, PAGE_SIZE, "%u\n", rc6pp_residency);
79 static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
80 static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
81 static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
82 static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
84 static struct attribute *rc6_attrs[] = {
85 &dev_attr_rc6_enable.attr,
86 &dev_attr_rc6_residency_ms.attr,
87 &dev_attr_rc6p_residency_ms.attr,
88 &dev_attr_rc6pp_residency_ms.attr,
92 static struct attribute_group rc6_attr_group = {
93 .name = power_group_name,
98 static int l3_access_valid(struct drm_device *dev, loff_t offset)
100 if (!HAS_L3_GPU_CACHE(dev))
106 if (offset >= GEN7_L3LOG_SIZE)
113 i915_l3_read(struct file *filp, struct kobject *kobj,
114 struct bin_attribute *attr, char *buf,
115 loff_t offset, size_t count)
117 struct device *dev = container_of(kobj, struct device, kobj);
118 struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
119 struct drm_device *drm_dev = dminor->dev;
120 struct drm_i915_private *dev_priv = drm_dev->dev_private;
124 count = round_down(count, 4);
126 ret = l3_access_valid(drm_dev, offset);
130 ret = i915_mutex_lock_interruptible(drm_dev);
134 misccpctl = I915_READ(GEN7_MISCCPCTL);
135 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
137 for (i = offset; count >= 4 && i < GEN7_L3LOG_SIZE; i += 4, count -= 4)
138 *((uint32_t *)(&buf[i])) = I915_READ(GEN7_L3LOG_BASE + i);
140 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
142 mutex_unlock(&drm_dev->struct_mutex);
148 i915_l3_write(struct file *filp, struct kobject *kobj,
149 struct bin_attribute *attr, char *buf,
150 loff_t offset, size_t count)
152 struct device *dev = container_of(kobj, struct device, kobj);
153 struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
154 struct drm_device *drm_dev = dminor->dev;
155 struct drm_i915_private *dev_priv = drm_dev->dev_private;
156 u32 *temp = NULL; /* Just here to make handling failures easy */
159 ret = l3_access_valid(drm_dev, offset);
163 ret = i915_mutex_lock_interruptible(drm_dev);
167 if (!dev_priv->l3_parity.remap_info) {
168 temp = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL);
170 mutex_unlock(&drm_dev->struct_mutex);
175 ret = i915_gpu_idle(drm_dev);
178 mutex_unlock(&drm_dev->struct_mutex);
182 /* TODO: Ideally we really want a GPU reset here to make sure errors
183 * aren't propagated. Since I cannot find a stable way to reset the GPU
184 * at this point it is left as a TODO.
187 dev_priv->l3_parity.remap_info = temp;
189 memcpy(dev_priv->l3_parity.remap_info + (offset/4),
193 i915_gem_l3_remap(drm_dev);
195 mutex_unlock(&drm_dev->struct_mutex);
200 static struct bin_attribute dpf_attrs = {
201 .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)},
202 .size = GEN7_L3LOG_SIZE,
203 .read = i915_l3_read,
204 .write = i915_l3_write,
208 static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
209 struct device_attribute *attr, char *buf)
211 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
212 struct drm_device *dev = minor->dev;
213 struct drm_i915_private *dev_priv = dev->dev_private;
216 mutex_lock(&dev_priv->rps.hw_lock);
217 if (IS_VALLEYVIEW(dev_priv->dev)) {
219 freq = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
220 ret = vlv_gpu_freq(dev_priv->mem_freq, (freq >> 8) & 0xff);
222 ret = dev_priv->rps.cur_delay * GT_FREQUENCY_MULTIPLIER;
224 mutex_unlock(&dev_priv->rps.hw_lock);
226 return snprintf(buf, PAGE_SIZE, "%d\n", ret);
229 static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev,
230 struct device_attribute *attr, char *buf)
232 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
233 struct drm_device *dev = minor->dev;
234 struct drm_i915_private *dev_priv = dev->dev_private;
236 return snprintf(buf, PAGE_SIZE, "%d\n",
237 vlv_gpu_freq(dev_priv->mem_freq,
238 dev_priv->rps.rpe_delay));
241 static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
243 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
244 struct drm_device *dev = minor->dev;
245 struct drm_i915_private *dev_priv = dev->dev_private;
248 mutex_lock(&dev_priv->rps.hw_lock);
249 if (IS_VALLEYVIEW(dev_priv->dev))
250 ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.max_delay);
252 ret = dev_priv->rps.max_delay * GT_FREQUENCY_MULTIPLIER;
253 mutex_unlock(&dev_priv->rps.hw_lock);
255 return snprintf(buf, PAGE_SIZE, "%d\n", ret);
258 static ssize_t gt_max_freq_mhz_store(struct device *kdev,
259 struct device_attribute *attr,
260 const char *buf, size_t count)
262 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
263 struct drm_device *dev = minor->dev;
264 struct drm_i915_private *dev_priv = dev->dev_private;
265 u32 val, rp_state_cap, hw_max, hw_min, non_oc_max;
268 ret = kstrtou32(buf, 0, &val);
272 mutex_lock(&dev_priv->rps.hw_lock);
274 if (IS_VALLEYVIEW(dev_priv->dev)) {
275 val = vlv_freq_opcode(dev_priv->mem_freq, val);
277 hw_max = valleyview_rps_max_freq(dev_priv);
278 hw_min = valleyview_rps_min_freq(dev_priv);
281 val /= GT_FREQUENCY_MULTIPLIER;
283 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
284 hw_max = dev_priv->rps.hw_max;
285 non_oc_max = (rp_state_cap & 0xff);
286 hw_min = ((rp_state_cap & 0xff0000) >> 16);
289 if (val < hw_min || val > hw_max ||
290 val < dev_priv->rps.min_delay) {
291 mutex_unlock(&dev_priv->rps.hw_lock);
295 if (val > non_oc_max)
296 DRM_DEBUG("User requested overclocking to %d\n",
297 val * GT_FREQUENCY_MULTIPLIER);
299 if (dev_priv->rps.cur_delay > val) {
300 if (IS_VALLEYVIEW(dev_priv->dev))
301 valleyview_set_rps(dev_priv->dev, val);
303 gen6_set_rps(dev_priv->dev, val);
306 dev_priv->rps.max_delay = val;
308 mutex_unlock(&dev_priv->rps.hw_lock);
313 static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
315 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
316 struct drm_device *dev = minor->dev;
317 struct drm_i915_private *dev_priv = dev->dev_private;
320 mutex_lock(&dev_priv->rps.hw_lock);
321 if (IS_VALLEYVIEW(dev_priv->dev))
322 ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.min_delay);
324 ret = dev_priv->rps.min_delay * GT_FREQUENCY_MULTIPLIER;
325 mutex_unlock(&dev_priv->rps.hw_lock);
327 return snprintf(buf, PAGE_SIZE, "%d\n", ret);
330 static ssize_t gt_min_freq_mhz_store(struct device *kdev,
331 struct device_attribute *attr,
332 const char *buf, size_t count)
334 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
335 struct drm_device *dev = minor->dev;
336 struct drm_i915_private *dev_priv = dev->dev_private;
337 u32 val, rp_state_cap, hw_max, hw_min;
340 ret = kstrtou32(buf, 0, &val);
344 mutex_lock(&dev_priv->rps.hw_lock);
346 if (IS_VALLEYVIEW(dev)) {
347 val = vlv_freq_opcode(dev_priv->mem_freq, val);
349 hw_max = valleyview_rps_max_freq(dev_priv);
350 hw_min = valleyview_rps_min_freq(dev_priv);
352 val /= GT_FREQUENCY_MULTIPLIER;
354 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
355 hw_max = dev_priv->rps.hw_max;
356 hw_min = ((rp_state_cap & 0xff0000) >> 16);
359 if (val < hw_min || val > hw_max || val > dev_priv->rps.max_delay) {
360 mutex_unlock(&dev_priv->rps.hw_lock);
364 if (dev_priv->rps.cur_delay < val) {
365 if (IS_VALLEYVIEW(dev))
366 valleyview_set_rps(dev, val);
368 gen6_set_rps(dev_priv->dev, val);
371 dev_priv->rps.min_delay = val;
373 mutex_unlock(&dev_priv->rps.hw_lock);
379 static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL);
380 static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store);
381 static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store);
383 static DEVICE_ATTR(vlv_rpe_freq_mhz, S_IRUGO, vlv_rpe_freq_mhz_show, NULL);
385 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf);
386 static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
387 static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
388 static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
390 /* For now we have a static number of RP states */
391 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
393 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
394 struct drm_device *dev = minor->dev;
395 struct drm_i915_private *dev_priv = dev->dev_private;
396 u32 val, rp_state_cap;
399 ret = mutex_lock_interruptible(&dev->struct_mutex);
402 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
403 mutex_unlock(&dev->struct_mutex);
405 if (attr == &dev_attr_gt_RP0_freq_mhz) {
406 val = ((rp_state_cap & 0x0000ff) >> 0) * GT_FREQUENCY_MULTIPLIER;
407 } else if (attr == &dev_attr_gt_RP1_freq_mhz) {
408 val = ((rp_state_cap & 0x00ff00) >> 8) * GT_FREQUENCY_MULTIPLIER;
409 } else if (attr == &dev_attr_gt_RPn_freq_mhz) {
410 val = ((rp_state_cap & 0xff0000) >> 16) * GT_FREQUENCY_MULTIPLIER;
414 return snprintf(buf, PAGE_SIZE, "%d\n", val);
417 static const struct attribute *gen6_attrs[] = {
418 &dev_attr_gt_cur_freq_mhz.attr,
419 &dev_attr_gt_max_freq_mhz.attr,
420 &dev_attr_gt_min_freq_mhz.attr,
421 &dev_attr_gt_RP0_freq_mhz.attr,
422 &dev_attr_gt_RP1_freq_mhz.attr,
423 &dev_attr_gt_RPn_freq_mhz.attr,
427 static const struct attribute *vlv_attrs[] = {
428 &dev_attr_gt_cur_freq_mhz.attr,
429 &dev_attr_gt_max_freq_mhz.attr,
430 &dev_attr_gt_min_freq_mhz.attr,
431 &dev_attr_vlv_rpe_freq_mhz.attr,
435 static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
436 struct bin_attribute *attr, char *buf,
437 loff_t off, size_t count)
440 struct device *kdev = container_of(kobj, struct device, kobj);
441 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
442 struct drm_device *dev = minor->dev;
443 struct i915_error_state_file_priv error_priv;
444 struct drm_i915_error_state_buf error_str;
445 ssize_t ret_count = 0;
448 memset(&error_priv, 0, sizeof(error_priv));
450 ret = i915_error_state_buf_init(&error_str, count, off);
454 error_priv.dev = dev;
455 i915_error_state_get(dev, &error_priv);
457 ret = i915_error_state_to_str(&error_str, &error_priv);
461 ret_count = count < error_str.bytes ? count : error_str.bytes;
463 memcpy(buf, error_str.buf, ret_count);
465 i915_error_state_put(&error_priv);
466 i915_error_state_buf_release(&error_str);
468 return ret ?: ret_count;
471 static ssize_t error_state_write(struct file *file, struct kobject *kobj,
472 struct bin_attribute *attr, char *buf,
473 loff_t off, size_t count)
475 struct device *kdev = container_of(kobj, struct device, kobj);
476 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
477 struct drm_device *dev = minor->dev;
480 DRM_DEBUG_DRIVER("Resetting error state\n");
482 ret = mutex_lock_interruptible(&dev->struct_mutex);
486 i915_destroy_error_state(dev);
487 mutex_unlock(&dev->struct_mutex);
492 static struct bin_attribute error_state_attr = {
493 .attr.name = "error",
494 .attr.mode = S_IRUSR | S_IWUSR,
496 .read = error_state_read,
497 .write = error_state_write,
500 void i915_setup_sysfs(struct drm_device *dev)
505 if (INTEL_INFO(dev)->gen >= 6) {
506 ret = sysfs_merge_group(&dev->primary->kdev.kobj,
509 DRM_ERROR("RC6 residency sysfs setup failed\n");
512 if (HAS_L3_GPU_CACHE(dev)) {
513 ret = device_create_bin_file(&dev->primary->kdev, &dpf_attrs);
515 DRM_ERROR("l3 parity sysfs setup failed\n");
519 if (IS_VALLEYVIEW(dev))
520 ret = sysfs_create_files(&dev->primary->kdev.kobj, vlv_attrs);
521 else if (INTEL_INFO(dev)->gen >= 6)
522 ret = sysfs_create_files(&dev->primary->kdev.kobj, gen6_attrs);
524 DRM_ERROR("RPS sysfs setup failed\n");
526 ret = sysfs_create_bin_file(&dev->primary->kdev.kobj,
529 DRM_ERROR("error_state sysfs setup failed\n");
532 void i915_teardown_sysfs(struct drm_device *dev)
534 sysfs_remove_bin_file(&dev->primary->kdev.kobj, &error_state_attr);
535 if (IS_VALLEYVIEW(dev))
536 sysfs_remove_files(&dev->primary->kdev.kobj, vlv_attrs);
538 sysfs_remove_files(&dev->primary->kdev.kobj, gen6_attrs);
539 device_remove_bin_file(&dev->primary->kdev, &dpf_attrs);
541 sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group);