1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/sysfs_gt.c b/drivers/gpu/drm/i915/gt/sysfs_gt.c
new file mode 100644
index 000000000000..46cf033a53ec
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/sysfs_gt.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <drm/drm_device.h>
+#include <linux/device.h>
+#include <linux/kobject.h>
+#include <linux/printk.h>
+#include <linux/sysfs.h>
+
+#include "i915_drv.h"
+#include "i915_sysfs.h"
+#include "intel_gt.h"
+#include "intel_gt_types.h"
+#include "intel_rc6.h"
+
+#include "sysfs_gt.h"
+#include "sysfs_gt_pm.h"
+
+struct intel_gt *intel_gt_sysfs_get_drvdata(struct device *dev,
+					    const char *name)
+{
+	struct kobject *kobj = &dev->kobj;
+
+	/*
+	 * We are interested at knowing from where the interface
+	 * has been called, whether it's called from gt/ or from
+	 * the parent directory.
+	 * From the interface position it depends also the value of
+	 * the private data.
+	 * If the interface is called from gt/ then private data is
+	 * of the "struct intel_gt *" type, otherwise it's * a
+	 * "struct drm_i915_private *" type.
+	 */
+	if (!is_object_gt(kobj)) {
+		struct drm_i915_private *i915 = kdev_minor_to_i915(dev);
+
+		pr_devel_ratelimited(DEPRECATED
+			"%s (pid %d) is trying to access deprecated %s "
+			"sysfs control, please use gt/gt<n>/%s instead\n",
+			current->comm, task_pid_nr(current), name, name);
+		return to_gt(i915);
+	}
+
+	return kobj_to_gt(kobj);
+}
+
+static struct kobject *gt_get_parent_obj(struct intel_gt *gt)
+{
+	return &gt->i915->drm.primary->kdev->kobj;
+}
+
+static ssize_t id_show(struct device *dev,
+		       struct device_attribute *attr,
+		       char *buf)
+{
+	struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
+
+	return sysfs_emit(buf, "%u\n", gt->info.id);
+}
+
+static DEVICE_ATTR_RO(id);
+
+static void kobj_gt_release(struct kobject *kobj)
+{
+	kfree(kobj);
+}
+
+static struct kobj_type kobj_gt_type = {
+	.release = kobj_gt_release,
+	.sysfs_ops = &kobj_sysfs_ops
+};
+
+struct kobject *
+intel_gt_create_kobj(struct intel_gt *gt, struct kobject *dir, const char *name)
+{
+	struct kobj_gt *kg;
+
+	kg = kzalloc(sizeof(*kg), GFP_KERNEL);
+	if (!kg)
+		return NULL;
+
+	kobject_init(&kg->base, &kobj_gt_type);
+	kg->gt = gt;
+
+	/* xfer ownership to sysfs tree */
+	if (kobject_add(&kg->base, dir, "%s", name)) {
+		kobject_put(&kg->base);
+		return NULL;
+	}
+
+	return &kg->base; /* borrowed ref */
+}
+
+void intel_gt_sysfs_register(struct intel_gt *gt)
+{
+	struct kobject *dir;
+	char name[80];
+
+	/*
+	 * We need to make things right with the
+	 * ABI compatibility. The files were originally
+	 * generated under the parent directory.
+	 *
+	 * We generate the files only for gt 0
+	 * to avoid duplicates.
+	 */
+	if (!gt->info.id)
+		intel_gt_sysfs_pm_init(gt, gt_get_parent_obj(gt));
+
+	snprintf(name, sizeof(name), "gt%d", gt->info.id);
+
+	dir = intel_gt_create_kobj(gt, gt->i915->sysfs_gt, name);
+	if (!dir) {
+		drm_err(&gt->i915->drm,
+			"failed to initialize %s sysfs root\n", name);
+		return;
+	}
+
+	if (sysfs_create_file(dir, &dev_attr_id.attr))
+		drm_err(&gt->i915->drm,
+			"failed to create sysfs %s info files\n", name);
+
+	intel_gt_sysfs_pm_init(gt, dir);
+}