forked from Minki/linux
84e81020ee
The Golden batch carries 3D state at the beginning so that HW starts with a known state. It is carried as a binary blob which is auto-generated from source. The idea was it would be easier to maintain and keep the complexity out of the kernel which makes sense as we don't really touch it. However if you really need to update it then you need to update generator source and keep the binary blob in sync with it. There is a need to patch this in bxt to send one additional command to enable a feature. A solution was to patch the binary data with some additional data structures (included as part of auto-generator source) but it was unnecessarily complicated. Chris suggested the idea of having a secondary batch and execute two batch buffers. It has clear advantages as we needn't touch the base golden batch, can customize secondary/auxiliary batch depending on Gen and can be carried in the driver with no dependencies. This patch adds support for this auxiliary batch which is inserted at the end of golden batch and is completely independent from it. Thanks to Mika for the preliminary review. v2: Strictly conform to the batch size requirements to cover Gen2 and add comments to clarify overflow check in macro (Chris, Mika). v3: aux_batch_offset was declared as u64, change it to u32 (Chris) Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Armin Reese <armin.c.reese@intel.com> Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/*
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* Copyright © 2014 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _I915_GEM_RENDER_STATE_H_
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#define _I915_GEM_RENDER_STATE_H_
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#include <linux/types.h>
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struct intel_renderstate_rodata {
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const u32 *reloc;
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const u32 *batch;
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const u32 batch_items;
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};
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struct render_state {
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const struct intel_renderstate_rodata *rodata;
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struct drm_i915_gem_object *obj;
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u64 ggtt_offset;
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int gen;
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u32 aux_batch_size;
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u32 aux_batch_offset;
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};
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int i915_gem_render_state_init(struct drm_i915_gem_request *req);
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void i915_gem_render_state_fini(struct render_state *so);
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int i915_gem_render_state_prepare(struct intel_engine_cs *ring,
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struct render_state *so);
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#endif /* _I915_GEM_RENDER_STATE_H_ */
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