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, 88 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_migrate.h b/drivers/gpu/drm/xe/xe_migrate.h
new file mode 100644
index 000000000000..267057a3847f
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_migrate.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef __XE_MIGRATE__
+#define __XE_MIGRATE__
+
+#include <drm/drm_mm.h>
+
+struct dma_fence;
+struct iosys_map;
+struct ttm_resource;
+
+struct xe_bo;
+struct xe_gt;
+struct xe_engine;
+struct xe_migrate;
+struct xe_migrate_pt_update;
+struct xe_sync_entry;
+struct xe_pt;
+struct xe_vm;
+struct xe_vm_pgtable_update;
+struct xe_vma;
+
+struct xe_migrate_pt_update_ops {
+	/**
+	 * populate() - Populate a command buffer or page-table with ptes.
+	 * @pt_update: Embeddable callback argument.
+	 * @gt: The gt for the current operation.
+	 * @map: struct iosys_map into the memory to be populated.
+	 * @pos: If @map is NULL, map into the memory to be populated.
+	 * @ofs: qword offset into @map, unused if @map is NULL.
+	 * @num_qwords: Number of qwords to write.
+	 * @update: Information about the PTEs to be inserted.
+	 *
+	 * This interface is intended to be used as a callback into the
+	 * page-table system to populate command buffers or shared
+	 * page-tables with PTEs.
+	 */
+	void (*populate)(struct xe_migrate_pt_update *pt_update,
+			 struct xe_gt *gt, struct iosys_map *map,
+			 void *pos, u32 ofs, u32 num_qwords,
+			 const struct xe_vm_pgtable_update *update);
+
+	/**
+	 * pre_commit(): Callback to be called just before arming the
+	 * sched_job.
+	 * @pt_update: Pointer to embeddable callback argument.
+	 *
+	 * Return: 0 on success, negative error code on error.
+	 */
+	int (*pre_commit)(struct xe_migrate_pt_update *pt_update);
+};
+
+struct xe_migrate_pt_update {
+	const struct xe_migrate_pt_update_ops *ops;
+	struct xe_vma *vma;
+};
+
+struct xe_migrate *xe_migrate_init(struct xe_gt *gt);
+
+struct dma_fence *xe_migrate_copy(struct xe_migrate *m,
+				  struct xe_bo *bo,
+				  struct ttm_resource *src,
+				  struct ttm_resource *dst);
+
+struct dma_fence *xe_migrate_clear(struct xe_migrate *m,
+				   struct xe_bo *bo,
+				   struct ttm_resource *dst,
+				   u32 value);
+
+struct xe_vm *xe_migrate_get_vm(struct xe_migrate *m);
+
+struct dma_fence *
+xe_migrate_update_pgtables(struct xe_migrate *m,
+			   struct xe_vm *vm,
+			   struct xe_bo *bo,
+			   struct xe_engine *eng,
+			   const struct xe_vm_pgtable_update *updates,
+			   u32 num_updates,
+			   struct xe_sync_entry *syncs, u32 num_syncs,
+			   struct xe_migrate_pt_update *pt_update);
+
+void xe_migrate_wait(struct xe_migrate *m);
+
+struct xe_engine *xe_gt_migrate_engine(struct xe_gt *gt);
+#endif