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, 57 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_pt_types.h b/drivers/gpu/drm/xe/xe_pt_types.h
new file mode 100644
index 000000000000..2ed64c0a4485
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_pt_types.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef _XE_PT_TYPES_H_
+#define _XE_PT_TYPES_H_
+
+#include "xe_pt_walk.h"
+
+enum xe_cache_level {
+	XE_CACHE_NONE,
+	XE_CACHE_WT,
+	XE_CACHE_WB,
+};
+
+#define XE_VM_MAX_LEVEL 4
+
+struct xe_pt {
+	struct xe_ptw base;
+	struct xe_bo *bo;
+	unsigned int level;
+	unsigned int num_live;
+	bool rebind;
+	bool is_compact;
+#if IS_ENABLED(CONFIG_DRM_XE_DEBUG_VM)
+	/** addr: Virtual address start address of the PT. */
+	u64 addr;
+#endif
+};
+
+struct xe_pt_entry {
+	struct xe_pt *pt;
+	u64 pte;
+};
+
+struct xe_vm_pgtable_update {
+	/** @bo: page table bo to write to */
+	struct xe_bo *pt_bo;
+
+	/** @ofs: offset inside this PTE to begin writing to (in qwords) */
+	u32 ofs;
+
+	/** @qwords: number of PTE's to write */
+	u32 qwords;
+
+	/** @pt: opaque pointer useful for the caller of xe_migrate_update_pgtables */
+	struct xe_pt *pt;
+
+	/** @pt_entries: Newly added pagetable entries */
+	struct xe_pt_entry *pt_entries;
+
+	/** @flags: Target flags */
+	u32 flags;
+};
+
+#endif