drm/xe: Introduce a new DRM driver for Intel GPUs

Xe, is a new driver for Intel GPUs that supports both integrated and
discrete platforms starting with Tiger Lake (first Intel Xe Architecture).

The code is at a stage where it is already functional and has experimental
support for multiple platforms starting from Tiger Lake, with initial
support implemented in Mesa (for Iris and Anv, our OpenGL and Vulkan
drivers), as well as in NEO (for OpenCL and Level0).

The new Xe driver leverages a lot from i915.

As for display, the intent is to share the display code with the i915
driver so that there is maximum reuse there. But it is not added
in this patch.

This initial work is a collaboration of many people and unfortunately
the big squashed patch won't fully honor the proper credits. But let's
get some git quick stats so we can at least try to preserve some of the
credits:

Co-developed-by: Matthew Brost <matthew.brost@intel.com>
Co-developed-by: Matthew Auld <matthew.auld@intel.com>
Co-developed-by: Matt Roper <matthew.d.roper@intel.com>
Co-developed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Co-developed-by: Francois Dugast <francois.dugast@intel.com>
Co-developed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Co-developed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Co-developed-by: Philippe Lecluse <philippe.lecluse@intel.com>
Co-developed-by: Nirmoy Das <nirmoy.das@intel.com>
Co-developed-by: Jani Nikula <jani.nikula@intel.com>
Co-developed-by: José Roberto de Souza <jose.souza@intel.com>
Co-developed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Co-developed-by: Dave Airlie <airlied@redhat.com>
Co-developed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Co-developed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_gt.h b/drivers/gpu/drm/xe/xe_gt.h
new file mode 100644
index 000000000000..5dc08a993cfe
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_gt.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef _XE_GT_H_
+#define _XE_GT_H_
+
+#include <drm/drm_util.h>
+
+#include "xe_device_types.h"
+#include "xe_hw_engine.h"
+
+#define for_each_hw_engine(hwe__, gt__, id__) \
+	for ((id__) = 0; (id__) < ARRAY_SIZE((gt__)->hw_engines); (id__)++) \
+	     for_each_if (((hwe__) = (gt__)->hw_engines + (id__)) && \
+			  xe_hw_engine_is_valid((hwe__)))
+
+int xe_gt_alloc(struct xe_device *xe, struct xe_gt *gt);
+int xe_gt_init_early(struct xe_gt *gt);
+int xe_gt_init_noalloc(struct xe_gt *gt);
+int xe_gt_init(struct xe_gt *gt);
+int xe_gt_record_default_lrcs(struct xe_gt *gt);
+void xe_gt_suspend_prepare(struct xe_gt *gt);
+int xe_gt_suspend(struct xe_gt *gt);
+int xe_gt_resume(struct xe_gt *gt);
+void xe_gt_reset_async(struct xe_gt *gt);
+void xe_gt_migrate_wait(struct xe_gt *gt);
+
+struct xe_gt *xe_find_full_gt(struct xe_gt *gt);
+
+/**
+ * xe_gt_any_hw_engine_by_reset_domain - scan the list of engines and return the
+ * first that matches the same reset domain as @class
+ * @gt: GT structure
+ * @class: hw engine class to lookup
+ */
+struct xe_hw_engine *
+xe_gt_any_hw_engine_by_reset_domain(struct xe_gt *gt, enum xe_engine_class class);
+
+struct xe_hw_engine *xe_gt_hw_engine(struct xe_gt *gt,
+				     enum xe_engine_class class,
+				     u16 instance,
+				     bool logical);
+
+static inline bool xe_gt_is_media_type(struct xe_gt *gt)
+{
+	return gt->info.type == XE_GT_TYPE_MEDIA;
+}
+
+static inline struct xe_device * gt_to_xe(struct xe_gt *gt)
+{
+	return gt->xe;
+}
+
+static inline bool xe_gt_is_usm_hwe(struct xe_gt *gt, struct xe_hw_engine *hwe)
+{
+	struct xe_device *xe = gt_to_xe(gt);
+
+	return xe->info.supports_usm && hwe->class == XE_ENGINE_CLASS_COPY &&
+		hwe->instance == gt->usm.reserved_bcs_instance;
+}
+
+#endif