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, 50 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_lrc.h b/drivers/gpu/drm/xe/xe_lrc.h
new file mode 100644
index 000000000000..e37f89e75ef8
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_lrc.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+#ifndef _XE_LRC_H_
+#define _XE_LRC_H_
+
+#include "xe_lrc_types.h"
+
+struct xe_device;
+struct xe_engine;
+enum xe_engine_class;
+struct xe_hw_engine;
+struct xe_vm;
+
+#define LRC_PPHWSP_SCRATCH_ADDR (0x34 * 4)
+
+int xe_lrc_init(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
+		struct xe_engine *e, struct xe_vm *vm, u32 ring_size);
+void xe_lrc_finish(struct xe_lrc *lrc);
+
+size_t xe_lrc_size(struct xe_device *xe, enum xe_engine_class class);
+u32 xe_lrc_pphwsp_offset(struct xe_lrc *lrc);
+
+void xe_lrc_set_ring_head(struct xe_lrc *lrc, u32 head);
+u32 xe_lrc_ring_head(struct xe_lrc *lrc);
+u32 xe_lrc_ring_space(struct xe_lrc *lrc);
+void xe_lrc_write_ring(struct xe_lrc *lrc, const void *data, size_t size);
+
+u32 xe_lrc_ggtt_addr(struct xe_lrc *lrc);
+u32 *xe_lrc_regs(struct xe_lrc *lrc);
+
+u32 xe_lrc_read_ctx_reg(struct xe_lrc *lrc, int reg_nr);
+void xe_lrc_write_ctx_reg(struct xe_lrc *lrc, int reg_nr, u32 val);
+
+u64 xe_lrc_descriptor(struct xe_lrc *lrc);
+
+u32 xe_lrc_seqno_ggtt_addr(struct xe_lrc *lrc);
+struct dma_fence *xe_lrc_create_seqno_fence(struct xe_lrc *lrc);
+s32 xe_lrc_seqno(struct xe_lrc *lrc);
+
+u32 xe_lrc_start_seqno_ggtt_addr(struct xe_lrc *lrc);
+s32 xe_lrc_start_seqno(struct xe_lrc *lrc);
+
+u32 xe_lrc_parallel_ggtt_addr(struct xe_lrc *lrc);
+struct iosys_map xe_lrc_parallel_map(struct xe_lrc *lrc);
+
+size_t xe_lrc_skip_size(struct xe_device *xe);
+
+#endif