/* * Copyright © 2012 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Ben Widawsky <ben@bwidawsk.net> * */ #include <linux/device.h> #include <linux/module.h> #include <linux/stat.h> #include <linux/sysfs.h> #include "intel_drv.h" #include "i915_drv.h" #ifdef CONFIG_PM static u32 calc_residency(struct drm_device *dev, const u32 reg) { struct drm_i915_private *dev_priv = dev->dev_private; u64 raw_time; /* 32b value may overflow during fixed point math */ if (!intel_enable_rc6(dev)) return 0; raw_time = I915_READ(reg) * 128ULL; return DIV_ROUND_UP_ULL(raw_time, 100000); } static ssize_t show_rc6_mask(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev); return snprintf(buf, PAGE_SIZE, "%x\n", intel_enable_rc6(dminor->dev)); } static ssize_t show_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev); u32 rc6_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6); return snprintf(buf, PAGE_SIZE, "%u\n", rc6_residency); } static ssize_t show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev); u32 rc6p_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6p); return snprintf(buf, PAGE_SIZE, "%u\n", rc6p_residency); } static ssize_t show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev); u32 rc6pp_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6pp); return snprintf(buf, PAGE_SIZE, "%u\n", rc6pp_residency); } static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL); static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL); static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL); static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL); static struct attribute *rc6_attrs[] = { &dev_attr_rc6_enable.attr, &dev_attr_rc6_residency_ms.attr, &dev_attr_rc6p_residency_ms.attr, &dev_attr_rc6pp_residency_ms.attr, NULL }; static struct attribute_group rc6_attr_group = { .name = power_group_name, .attrs = rc6_attrs }; #endif static int l3_access_valid(struct drm_device *dev, loff_t offset) { if (!HAS_L3_GPU_CACHE(dev)) return -EPERM; if (offset % 4 != 0) return -EINVAL; if (offset >= GEN7_L3LOG_SIZE) return -ENXIO; return 0; } static ssize_t i915_l3_read(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t offset, size_t count) { struct device *dev = container_of(kobj, struct device, kobj); struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev); struct drm_device *drm_dev = dminor->dev; struct drm_i915_private *dev_priv = drm_dev->dev_private; uint32_t misccpctl; int i, ret; ret = l3_access_valid(drm_dev, offset); if (ret) return ret; ret = i915_mutex_lock_interruptible(drm_dev); if (ret) return ret; misccpctl = I915_READ(GEN7_MISCCPCTL); I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); for (i = offset; count >= 4 && i < GEN7_L3LOG_SIZE; i += 4, count -= 4) *((uint32_t *)(&buf[i])) = I915_READ(GEN7_L3LOG_BASE + i); I915_WRITE(GEN7_MISCCPCTL, misccpctl); mutex_unlock(&drm_dev->struct_mutex); return i - offset; } static ssize_t i915_l3_write(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t offset, size_t count) { struct device *dev = container_of(kobj, struct device, kobj); struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev); struct drm_device *drm_dev = dminor->dev; struct drm_i915_private *dev_priv = drm_dev->dev_private; u32 *temp = NULL; /* Just here to make handling failures easy */ int ret; ret = l3_access_valid(drm_dev, offset); if (ret) return ret; ret = i915_mutex_lock_interruptible(drm_dev); if (ret) return ret; if (!dev_priv->l3_parity.remap_info) { temp = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL); if (!temp) { mutex_unlock(&drm_dev->struct_mutex); return -ENOMEM; } } ret = i915_gpu_idle(drm_dev); if (ret) { kfree(temp); mutex_unlock(&drm_dev->struct_mutex); return ret; } /* TODO: Ideally we really want a GPU reset here to make sure errors * aren't propagated. Since I cannot find a stable way to reset the GPU * at this point it is left as a TODO. */ if (temp) dev_priv->l3_parity.remap_info = temp; memcpy(dev_priv->l3_parity.remap_info + (offset/4), buf + (offset/4), count); i915_gem_l3_remap(drm_dev); mutex_unlock(&drm_dev->struct_mutex); return count; } static struct bin_attribute dpf_attrs = { .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)}, .size = GEN7_L3LOG_SIZE, .read = i915_l3_read, .write = i915_l3_write, .mmap = NULL }; static ssize_t gt_cur_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); struct drm_device *dev = minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; int ret; mutex_lock(&dev_priv->rps.hw_lock); if (IS_VALLEYVIEW(dev_priv->dev)) { u32 freq; freq = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); ret = vlv_gpu_freq(dev_priv->mem_freq, (freq >> 8) & 0xff); } else { ret = dev_priv->rps.cur_delay * GT_FREQUENCY_MULTIPLIER; } mutex_unlock(&dev_priv->rps.hw_lock); return snprintf(buf, PAGE_SIZE, "%d\n", ret); } static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); struct drm_device *dev = minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; int ret; mutex_lock(&dev_priv->rps.hw_lock); if (IS_VALLEYVIEW(dev_priv->dev)) ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.max_delay); else ret = dev_priv->rps.max_delay * GT_FREQUENCY_MULTIPLIER; mutex_unlock(&dev_priv->rps.hw_lock); return snprintf(buf, PAGE_SIZE, "%d\n", ret); } static ssize_t gt_max_freq_mhz_store(struct device *kdev, struct device_attribute *attr, const char *buf, size_t count) { struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); struct drm_device *dev = minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; u32 val, rp_state_cap, hw_max, hw_min, non_oc_max; ssize_t ret; ret = kstrtou32(buf, 0, &val); if (ret) return ret; mutex_lock(&dev_priv->rps.hw_lock); if (IS_VALLEYVIEW(dev_priv->dev)) { val = vlv_freq_opcode(dev_priv->mem_freq, val); hw_max = valleyview_rps_max_freq(dev_priv); hw_min = valleyview_rps_min_freq(dev_priv); non_oc_max = hw_max; } else { val /= GT_FREQUENCY_MULTIPLIER; rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); hw_max = dev_priv->rps.hw_max; non_oc_max = (rp_state_cap & 0xff); hw_min = ((rp_state_cap & 0xff0000) >> 16); } if (val < hw_min || val > hw_max || val < dev_priv->rps.min_delay) { mutex_unlock(&dev_priv->rps.hw_lock); return -EINVAL; } if (val > non_oc_max) DRM_DEBUG("User requested overclocking to %d\n", val * GT_FREQUENCY_MULTIPLIER); if (dev_priv->rps.cur_delay > val) { if (IS_VALLEYVIEW(dev_priv->dev)) valleyview_set_rps(dev_priv->dev, val); else gen6_set_rps(dev_priv->dev, val); } dev_priv->rps.max_delay = val; mutex_unlock(&dev_priv->rps.hw_lock); return count; } static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); struct drm_device *dev = minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; int ret; mutex_lock(&dev_priv->rps.hw_lock); if (IS_VALLEYVIEW(dev_priv->dev)) ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.min_delay); else ret = dev_priv->rps.min_delay * GT_FREQUENCY_MULTIPLIER; mutex_unlock(&dev_priv->rps.hw_lock); return snprintf(buf, PAGE_SIZE, "%d\n", ret); } static ssize_t gt_min_freq_mhz_store(struct device *kdev, struct device_attribute *attr, const char *buf, size_t count) { struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); struct drm_device *dev = minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; u32 val, rp_state_cap, hw_max, hw_min; ssize_t ret; ret = kstrtou32(buf, 0, &val); if (ret) return ret; mutex_lock(&dev_priv->rps.hw_lock); if (IS_VALLEYVIEW(dev)) { val = vlv_freq_opcode(dev_priv->mem_freq, val); hw_max = valleyview_rps_max_freq(dev_priv); hw_min = valleyview_rps_min_freq(dev_priv); } else { val /= GT_FREQUENCY_MULTIPLIER; rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); hw_max = dev_priv->rps.hw_max; hw_min = ((rp_state_cap & 0xff0000) >> 16); } if (val < hw_min || val > hw_max || val > dev_priv->rps.max_delay) { mutex_unlock(&dev_priv->rps.hw_lock); return -EINVAL; } if (dev_priv->rps.cur_delay < val) { if (IS_VALLEYVIEW(dev)) valleyview_set_rps(dev, val); else gen6_set_rps(dev_priv->dev, val); } dev_priv->rps.min_delay = val; mutex_unlock(&dev_priv->rps.hw_lock); return count; } static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL); static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store); static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store); static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf); static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); /* For now we have a static number of RP states */ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); struct drm_device *dev = minor->dev; struct drm_i915_private *dev_priv = dev->dev_private; u32 val, rp_state_cap; ssize_t ret; ret = mutex_lock_interruptible(&dev->struct_mutex); if (ret) return ret; rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); mutex_unlock(&dev->struct_mutex); if (attr == &dev_attr_gt_RP0_freq_mhz) { val = ((rp_state_cap & 0x0000ff) >> 0) * GT_FREQUENCY_MULTIPLIER; } else if (attr == &dev_attr_gt_RP1_freq_mhz) { val = ((rp_state_cap & 0x00ff00) >> 8) * GT_FREQUENCY_MULTIPLIER; } else if (attr == &dev_attr_gt_RPn_freq_mhz) { val = ((rp_state_cap & 0xff0000) >> 16) * GT_FREQUENCY_MULTIPLIER; } else { BUG(); } return snprintf(buf, PAGE_SIZE, "%d\n", val); } static const struct attribute *gen6_attrs[] = { &dev_attr_gt_cur_freq_mhz.attr, &dev_attr_gt_max_freq_mhz.attr, &dev_attr_gt_min_freq_mhz.attr, &dev_attr_gt_RP0_freq_mhz.attr, &dev_attr_gt_RP1_freq_mhz.attr, &dev_attr_gt_RPn_freq_mhz.attr, NULL, }; void i915_setup_sysfs(struct drm_device *dev) { int ret; #ifdef CONFIG_PM if (INTEL_INFO(dev)->gen >= 6) { ret = sysfs_merge_group(&dev->primary->kdev.kobj, &rc6_attr_group); if (ret) DRM_ERROR("RC6 residency sysfs setup failed\n"); } #endif if (HAS_L3_GPU_CACHE(dev)) { ret = device_create_bin_file(&dev->primary->kdev, &dpf_attrs); if (ret) DRM_ERROR("l3 parity sysfs setup failed\n"); } if (INTEL_INFO(dev)->gen >= 6) { ret = sysfs_create_files(&dev->primary->kdev.kobj, gen6_attrs); if (ret) DRM_ERROR("gen6 sysfs setup failed\n"); } } void i915_teardown_sysfs(struct drm_device *dev) { sysfs_remove_files(&dev->primary->kdev.kobj, gen6_attrs); device_remove_bin_file(&dev->primary->kdev, &dpf_attrs); #ifdef CONFIG_PM sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group); #endif }