e7f65655cb
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Chad Versace <chad.versace@linux.intel.com>
140 lines
4.5 KiB
C
140 lines
4.5 KiB
C
/*
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* Copyright 2003 VMware, Inc.
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* Copyright © 2007 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 DEALINGS
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* IN THE SOFTWARE.
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*/
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/**
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* @file intel_upload.c
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*
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* Batched upload via BOs.
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*/
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#include "main/imports.h"
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#include "main/mtypes.h"
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#include "main/macros.h"
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#include "main/bufferobj.h"
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#include "brw_context.h"
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#include "intel_blit.h"
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#include "intel_buffer_objects.h"
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#include "intel_batchbuffer.h"
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#include "intel_fbo.h"
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#include "intel_mipmap_tree.h"
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#include "brw_context.h"
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#define INTEL_UPLOAD_SIZE (64*1024)
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/**
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* Like ALIGN(), but works with a non-power-of-two alignment.
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*/
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#define ALIGN_NPOT(value, alignment) \
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(((value) + (alignment) - 1) / (alignment) * (alignment))
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void
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intel_upload_finish(struct brw_context *brw)
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{
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if (!brw->upload.bo)
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return;
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drm_intel_bo_unmap(brw->upload.bo);
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drm_intel_bo_unreference(brw->upload.bo);
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brw->upload.bo = NULL;
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brw->upload.next_offset = 0;
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}
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/**
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* Interface for getting memory for uploading streamed data to the GPU
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*
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* In most cases, streamed data (for GPU state structures, for example) is
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* uploaded through brw_state_batch(), since that interface allows relocations
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* from the streamed space returned to other BOs. However, that interface has
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* the restriction that the amount of space allocated has to be "small" (see
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* estimated_max_prim_size in brw_draw.c).
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*
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* This interface, on the other hand, is able to handle arbitrary sized
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* allocation requests, though it will batch small allocations into the same
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* BO for efficiency and reduced memory footprint.
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*
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* \note The returned pointer is valid only until intel_upload_finish(), which
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* will happen at batch flush or the next
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* intel_upload_space()/intel_upload_data().
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*
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* \param out_bo Pointer to a BO, which must point to a valid BO or NULL on
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* entry, and will have a reference to the new BO containing the state on
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* return.
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*
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* \param out_offset Offset within the buffer object that the data will land.
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*/
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void *
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intel_upload_space(struct brw_context *brw,
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uint32_t size,
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uint32_t alignment,
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drm_intel_bo **out_bo,
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uint32_t *out_offset)
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{
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uint32_t offset;
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offset = ALIGN_NPOT(brw->upload.next_offset, alignment);
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if (brw->upload.bo && offset + size > brw->upload.bo->size) {
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intel_upload_finish(brw);
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offset = 0;
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}
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if (!brw->upload.bo) {
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brw->upload.bo = drm_intel_bo_alloc(brw->bufmgr, "streamed data",
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MAX2(INTEL_UPLOAD_SIZE, size), 4096);
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if (brw->has_llc)
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drm_intel_bo_map(brw->upload.bo, true);
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else
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drm_intel_gem_bo_map_gtt(brw->upload.bo);
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}
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brw->upload.next_offset = offset + size;
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*out_offset = offset;
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if (*out_bo != brw->upload.bo) {
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drm_intel_bo_unreference(*out_bo);
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*out_bo = brw->upload.bo;
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drm_intel_bo_reference(brw->upload.bo);
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}
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return brw->upload.bo->virtual + offset;
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}
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/**
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* Handy interface to upload some data to temporary GPU memory quickly.
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*
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* References to this memory should not be retained across batch flushes.
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*/
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void
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intel_upload_data(struct brw_context *brw,
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const void *data,
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uint32_t size,
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uint32_t alignment,
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drm_intel_bo **out_bo,
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uint32_t *out_offset)
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{
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void *dst = intel_upload_space(brw, size, alignment, out_bo, out_offset);
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memcpy(dst, data, size);
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}
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