239 lines
6.5 KiB
C
239 lines
6.5 KiB
C
/*
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* Copyright © 2012 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Ben Widawsky <ben@bwidawsk.net>
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*
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/stat.h>
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#include <linux/sysfs.h>
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#include "intel_drv.h"
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#include "i915_drv.h"
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#ifdef CONFIG_PM
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static u32 calc_residency(struct drm_device *dev, const u32 reg)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u64 raw_time; /* 32b value may overflow during fixed point math */
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if (!intel_enable_rc6(dev))
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return 0;
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raw_time = I915_READ(reg) * 128ULL;
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return DIV_ROUND_UP_ULL(raw_time, 100000);
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}
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static ssize_t
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show_rc6_mask(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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return snprintf(buf, PAGE_SIZE, "%x", intel_enable_rc6(dminor->dev));
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}
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static ssize_t
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show_rc6_ms(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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u32 rc6_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6);
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return snprintf(buf, PAGE_SIZE, "%u", rc6_residency);
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}
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static ssize_t
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show_rc6p_ms(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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u32 rc6p_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6p);
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return snprintf(buf, PAGE_SIZE, "%u", rc6p_residency);
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}
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static ssize_t
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show_rc6pp_ms(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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u32 rc6pp_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6pp);
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return snprintf(buf, PAGE_SIZE, "%u", rc6pp_residency);
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}
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static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
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static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
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static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
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static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
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static struct attribute *rc6_attrs[] = {
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&dev_attr_rc6_enable.attr,
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&dev_attr_rc6_residency_ms.attr,
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&dev_attr_rc6p_residency_ms.attr,
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&dev_attr_rc6pp_residency_ms.attr,
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NULL
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};
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static struct attribute_group rc6_attr_group = {
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.name = power_group_name,
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.attrs = rc6_attrs
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};
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static int l3_access_valid(struct drm_device *dev, loff_t offset)
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{
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if (!IS_IVYBRIDGE(dev))
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return -EPERM;
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if (offset % 4 != 0)
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return -EINVAL;
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if (offset >= GEN7_L3LOG_SIZE)
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return -ENXIO;
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return 0;
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}
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static ssize_t
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i915_l3_read(struct file *filp, struct kobject *kobj,
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struct bin_attribute *attr, char *buf,
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loff_t offset, size_t count)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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struct drm_device *drm_dev = dminor->dev;
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struct drm_i915_private *dev_priv = drm_dev->dev_private;
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uint32_t misccpctl;
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int i, ret;
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ret = l3_access_valid(drm_dev, offset);
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if (ret)
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return ret;
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ret = i915_mutex_lock_interruptible(drm_dev);
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if (ret)
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return ret;
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misccpctl = I915_READ(GEN7_MISCCPCTL);
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I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
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for (i = offset; count >= 4 && i < GEN7_L3LOG_SIZE; i += 4, count -= 4)
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*((uint32_t *)(&buf[i])) = I915_READ(GEN7_L3LOG_BASE + i);
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I915_WRITE(GEN7_MISCCPCTL, misccpctl);
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mutex_unlock(&drm_dev->struct_mutex);
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return i - offset;
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}
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static ssize_t
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i915_l3_write(struct file *filp, struct kobject *kobj,
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struct bin_attribute *attr, char *buf,
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loff_t offset, size_t count)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct drm_minor *dminor = container_of(dev, struct drm_minor, kdev);
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struct drm_device *drm_dev = dminor->dev;
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struct drm_i915_private *dev_priv = drm_dev->dev_private;
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u32 *temp = NULL; /* Just here to make handling failures easy */
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int ret;
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ret = l3_access_valid(drm_dev, offset);
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if (ret)
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return ret;
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ret = i915_mutex_lock_interruptible(drm_dev);
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if (ret)
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return ret;
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if (!dev_priv->mm.l3_remap_info) {
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temp = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL);
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if (!temp) {
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mutex_unlock(&drm_dev->struct_mutex);
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return -ENOMEM;
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}
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}
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ret = i915_gpu_idle(drm_dev);
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if (ret) {
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kfree(temp);
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mutex_unlock(&drm_dev->struct_mutex);
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return ret;
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}
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/* TODO: Ideally we really want a GPU reset here to make sure errors
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* aren't propagated. Since I cannot find a stable way to reset the GPU
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* at this point it is left as a TODO.
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*/
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if (temp)
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dev_priv->mm.l3_remap_info = temp;
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memcpy(dev_priv->mm.l3_remap_info + (offset/4),
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buf + (offset/4),
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count);
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i915_gem_l3_remap(drm_dev);
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mutex_unlock(&drm_dev->struct_mutex);
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return count;
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}
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static struct bin_attribute dpf_attrs = {
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.attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)},
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.size = GEN7_L3LOG_SIZE,
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.read = i915_l3_read,
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.write = i915_l3_write,
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.mmap = NULL
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};
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void i915_setup_sysfs(struct drm_device *dev)
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{
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int ret;
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if (INTEL_INFO(dev)->gen >= 6) {
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ret = sysfs_merge_group(&dev->primary->kdev.kobj,
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&rc6_attr_group);
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if (ret)
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DRM_ERROR("RC6 residency sysfs setup failed\n");
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}
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if (IS_IVYBRIDGE(dev)) {
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ret = device_create_bin_file(&dev->primary->kdev, &dpf_attrs);
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if (ret)
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DRM_ERROR("l3 parity sysfs setup failed\n");
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}
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}
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void i915_teardown_sysfs(struct drm_device *dev)
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{
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device_remove_bin_file(&dev->primary->kdev, &dpf_attrs);
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sysfs_unmerge_group(&dev->primary->kdev.kobj, &rc6_attr_group);
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}
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#else
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void i915_setup_sysfs(struct drm_device *dev)
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{
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return;
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}
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void i915_teardown_sysfs(struct drm_device *dev)
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{
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return;
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}
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#endif /* CONFIG_PM */
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