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 ret = l3_access_valid(drm_dev, offset);
128 ret = i915_mutex_lock_interruptible(drm_dev);
132 misccpctl = I915_READ(GEN7_MISCCPCTL);
133 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
135 for (i = offset; count >= 4 && i < GEN7_L3LOG_SIZE; i += 4, count -= 4)
136 *((uint32_t *)(&buf[i])) = I915_READ(GEN7_L3LOG_BASE + i);
138 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
140 mutex_unlock(&drm_dev->struct_mutex);
146 i915_l3_write(struct file *filp, struct kobject *kobj,
147 struct bin_attribute *attr, char *buf,
148 loff_t offset, size_t count)
150 struct device *dev = container_of(kobj, struct device, kobj);
151 struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
152 struct drm_device *drm_dev = dminor->dev;
153 struct drm_i915_private *dev_priv = drm_dev->dev_private;
154 u32 *temp = NULL; /* Just here to make handling failures easy */
157 ret = l3_access_valid(drm_dev, offset);
161 ret = i915_mutex_lock_interruptible(drm_dev);
165 if (!dev_priv->l3_parity.remap_info) {
166 temp = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL);
168 mutex_unlock(&drm_dev->struct_mutex);
173 ret = i915_gpu_idle(drm_dev);
176 mutex_unlock(&drm_dev->struct_mutex);
180 /* TODO: Ideally we really want a GPU reset here to make sure errors
181 * aren't propagated. Since I cannot find a stable way to reset the GPU
182 * at this point it is left as a TODO.
185 dev_priv->l3_parity.remap_info = temp;
187 memcpy(dev_priv->l3_parity.remap_info + (offset/4),
191 i915_gem_l3_remap(drm_dev);
193 mutex_unlock(&drm_dev->struct_mutex);
198 static struct bin_attribute dpf_attrs = {
199 .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)},
200 .size = GEN7_L3LOG_SIZE,
201 .read = i915_l3_read,
202 .write = i915_l3_write,
206 static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
207 struct device_attribute *attr, char *buf)
209 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
210 struct drm_device *dev = minor->dev;
211 struct drm_i915_private *dev_priv = dev->dev_private;
214 mutex_lock(&dev_priv->rps.hw_lock);
215 if (IS_VALLEYVIEW(dev_priv->dev))
216 ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.cur_delay);
218 ret = dev_priv->rps.cur_delay * GT_FREQUENCY_MULTIPLIER;
219 mutex_unlock(&dev_priv->rps.hw_lock);
221 return snprintf(buf, PAGE_SIZE, "%d\n", ret);
224 static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
226 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
227 struct drm_device *dev = minor->dev;
228 struct drm_i915_private *dev_priv = dev->dev_private;
231 mutex_lock(&dev_priv->rps.hw_lock);
232 if (IS_VALLEYVIEW(dev_priv->dev))
233 ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.max_delay);
235 ret = dev_priv->rps.max_delay * GT_FREQUENCY_MULTIPLIER;
236 mutex_unlock(&dev_priv->rps.hw_lock);
238 return snprintf(buf, PAGE_SIZE, "%d\n", ret);
241 static ssize_t gt_max_freq_mhz_store(struct device *kdev,
242 struct device_attribute *attr,
243 const char *buf, size_t count)
245 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
246 struct drm_device *dev = minor->dev;
247 struct drm_i915_private *dev_priv = dev->dev_private;
248 u32 val, rp_state_cap, hw_max, hw_min, non_oc_max;
251 ret = kstrtou32(buf, 0, &val);
255 mutex_lock(&dev_priv->rps.hw_lock);
257 if (IS_VALLEYVIEW(dev_priv->dev)) {
258 val = vlv_freq_opcode(dev_priv->mem_freq, val);
260 hw_max = valleyview_rps_max_freq(dev_priv);
261 hw_min = valleyview_rps_min_freq(dev_priv);
264 val /= GT_FREQUENCY_MULTIPLIER;
266 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
267 hw_max = dev_priv->rps.hw_max;
268 non_oc_max = (rp_state_cap & 0xff);
269 hw_min = ((rp_state_cap & 0xff0000) >> 16);
272 if (val < hw_min || val > hw_max ||
273 val < dev_priv->rps.min_delay) {
274 mutex_unlock(&dev_priv->rps.hw_lock);
278 if (val > non_oc_max)
279 DRM_DEBUG("User requested overclocking to %d\n",
280 val * GT_FREQUENCY_MULTIPLIER);
282 if (dev_priv->rps.cur_delay > val) {
283 if (IS_VALLEYVIEW(dev_priv->dev))
284 valleyview_set_rps(dev_priv->dev, val);
286 gen6_set_rps(dev_priv->dev, val);
289 dev_priv->rps.max_delay = val;
291 mutex_unlock(&dev_priv->rps.hw_lock);
296 static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
298 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
299 struct drm_device *dev = minor->dev;
300 struct drm_i915_private *dev_priv = dev->dev_private;
303 mutex_lock(&dev_priv->rps.hw_lock);
304 if (IS_VALLEYVIEW(dev_priv->dev))
305 ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.min_delay);
307 ret = dev_priv->rps.min_delay * GT_FREQUENCY_MULTIPLIER;
308 mutex_unlock(&dev_priv->rps.hw_lock);
310 return snprintf(buf, PAGE_SIZE, "%d\n", ret);
313 static ssize_t gt_min_freq_mhz_store(struct device *kdev,
314 struct device_attribute *attr,
315 const char *buf, size_t count)
317 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
318 struct drm_device *dev = minor->dev;
319 struct drm_i915_private *dev_priv = dev->dev_private;
320 u32 val, rp_state_cap, hw_max, hw_min;
323 ret = kstrtou32(buf, 0, &val);
327 mutex_lock(&dev_priv->rps.hw_lock);
329 if (IS_VALLEYVIEW(dev)) {
330 val = vlv_freq_opcode(dev_priv->mem_freq, val);
332 hw_max = valleyview_rps_max_freq(dev_priv);
333 hw_min = valleyview_rps_min_freq(dev_priv);
335 val /= GT_FREQUENCY_MULTIPLIER;
337 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
338 hw_max = dev_priv->rps.hw_max;
339 hw_min = ((rp_state_cap & 0xff0000) >> 16);
342 if (val < hw_min || val > hw_max || val > dev_priv->rps.max_delay) {
343 mutex_unlock(&dev_priv->rps.hw_lock);
347 if (dev_priv->rps.cur_delay < val) {
348 if (IS_VALLEYVIEW(dev))
349 valleyview_set_rps(dev, val);
351 gen6_set_rps(dev_priv->dev, val);
354 dev_priv->rps.min_delay = val;
356 mutex_unlock(&dev_priv->rps.hw_lock);
362 static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL);
363 static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store);
364 static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store);
367 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf);
368 static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
369 static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
370 static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
372 /* For now we have a static number of RP states */
373 static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
375 struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev);
376 struct drm_device *dev = minor->dev;
377 struct drm_i915_private *dev_priv = dev->dev_private;
378 u32 val, rp_state_cap;
381 ret = mutex_lock_interruptible(&dev->struct_mutex);
384 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
385 mutex_unlock(&dev->struct_mutex);
387 if (attr == &dev_attr_gt_RP0_freq_mhz) {
388 val = ((rp_state_cap & 0x0000ff) >> 0) * GT_FREQUENCY_MULTIPLIER;
389 } else if (attr == &dev_attr_gt_RP1_freq_mhz) {
390 val = ((rp_state_cap & 0x00ff00) >> 8) * GT_FREQUENCY_MULTIPLIER;
391 } else if (attr == &dev_attr_gt_RPn_freq_mhz) {
392 val = ((rp_state_cap & 0xff0000) >> 16) * GT_FREQUENCY_MULTIPLIER;
396 return snprintf(buf, PAGE_SIZE, "%d\n", val);
399 static const struct attribute *gen6_attrs[] = {
400 &dev_attr_gt_cur_freq_mhz.attr,
401 &dev_attr_gt_max_freq_mhz.attr,
402 &dev_attr_gt_min_freq_mhz.attr,
403 &dev_attr_gt_RP0_freq_mhz.attr,
404 &dev_attr_gt_RP1_freq_mhz.attr,
405 &dev_attr_gt_RPn_freq_mhz.attr,
409 void i915_setup_sysfs(struct drm_device *dev)
414 if (INTEL_INFO(dev)->gen >= 6) {
415 ret = sysfs_merge_group(&dev->primary->kdev.kobj,
418 DRM_ERROR("RC6 residency sysfs setup failed\n");
421 if (HAS_L3_GPU_CACHE(dev)) {
422 ret = device_create_bin_file(&dev->primary->kdev, &dpf_attrs);
424 DRM_ERROR("l3 parity sysfs setup failed\n");
427 if (INTEL_INFO(dev)->gen >= 6) {
428 ret = sysfs_create_files(&dev->primary->kdev.kobj, gen6_attrs);
430 DRM_ERROR("gen6 sysfs setup failed\n");
434 void i915_teardown_sysfs(struct drm_device *dev)
436 sysfs_remove_files(&dev->primary->kdev.kobj, gen6_attrs);
437 device_remove_bin_file(&dev->primary->kdev, &dpf_attrs);
439 sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group);