diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_sysfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_sysfs.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c index 6875b5654c63..a777e7f3b0df 100644 --- a/drivers/gpu/drm/i915/i915_sysfs.c +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -409,6 +409,71 @@ static const struct attribute *gen6_attrs[] = { NULL, }; +static ssize_t error_state_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + + struct device *kdev = container_of(kobj, struct device, kobj); + struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); + struct drm_device *dev = minor->dev; + struct i915_error_state_file_priv error_priv; + struct drm_i915_error_state_buf error_str; + ssize_t ret_count = 0; + int ret; + + memset(&error_priv, 0, sizeof(error_priv)); + + ret = i915_error_state_buf_init(&error_str, count, off); + if (ret) + return ret; + + error_priv.dev = dev; + i915_error_state_get(dev, &error_priv); + + ret = i915_error_state_to_str(&error_str, &error_priv); + if (ret) + goto out; + + ret_count = count < error_str.bytes ? count : error_str.bytes; + + memcpy(buf, error_str.buf, ret_count); +out: + i915_error_state_put(&error_priv); + i915_error_state_buf_release(&error_str); + + return ret ?: ret_count; +} + +static ssize_t error_state_write(struct file *file, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + struct device *kdev = container_of(kobj, struct device, kobj); + struct drm_minor *minor = container_of(kdev, struct drm_minor, kdev); + struct drm_device *dev = minor->dev; + int ret; + + DRM_DEBUG_DRIVER("Resetting error state\n"); + + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + + i915_destroy_error_state(dev); + mutex_unlock(&dev->struct_mutex); + + return count; +} + +static struct bin_attribute error_state_attr = { + .attr.name = "error", + .attr.mode = S_IRUSR | S_IWUSR, + .size = 0, + .read = error_state_read, + .write = error_state_write, +}; + void i915_setup_sysfs(struct drm_device *dev) { int ret; @@ -432,10 +497,16 @@ void i915_setup_sysfs(struct drm_device *dev) if (ret) DRM_ERROR("gen6 sysfs setup failed\n"); } + + ret = sysfs_create_bin_file(&dev->primary->kdev.kobj, + &error_state_attr); + if (ret) + DRM_ERROR("error_state sysfs setup failed\n"); } void i915_teardown_sysfs(struct drm_device *dev) { + sysfs_remove_bin_file(&dev->primary->kdev.kobj, &error_state_attr); sysfs_remove_files(&dev->primary->kdev.kobj, gen6_attrs); device_remove_bin_file(&dev->primary->kdev, &dpf_attrs); #ifdef CONFIG_PM |