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2b762363ac
Some buffers like userd are physically addressed. If nvlink is enabled, or device is not iommuable, this requires buffer to be physically contiguous. Add NVGPU_DMA_PHYSICALLY_ADDRESSED to identify such buffers, in order to force physically contiguous allocation, only in above cases. Bug 2422486 Change-Id: I6426e23b064904e812e6b33e6d706391648a51ae Signed-off-by: Thomas Fleury <tfleury@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1959034 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/*
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* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
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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 shall be included in
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* all copies or substantial portions of the 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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#include <nvgpu/ltc.h>
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#include <nvgpu/dma.h>
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#include <nvgpu/nvgpu_mem.h>
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#include <nvgpu/gk20a.h>
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#include "gk20a/gr_gk20a.h"
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int nvgpu_ltc_alloc_cbc(struct gk20a *g, size_t compbit_backing_size,
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bool vidmem_alloc)
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{
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struct gr_gk20a *gr = &g->gr;
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if (nvgpu_mem_is_valid(&gr->compbit_store.mem))
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return 0;
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if (vidmem_alloc) {
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/*
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* Backing store MUST be physically contiguous and allocated in
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* one chunk
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* Vidmem allocation API does not support FORCE_CONTIGUOUS like
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* flag to allocate contiguous memory
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* But this allocation will happen in vidmem bootstrap allocator
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* which always allocates contiguous memory
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*/
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return nvgpu_dma_alloc_vid(g,
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compbit_backing_size,
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&gr->compbit_store.mem);
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} else {
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return nvgpu_dma_alloc_flags_sys(g,
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NVGPU_DMA_PHYSICALLY_ADDRESSED,
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compbit_backing_size,
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&gr->compbit_store.mem);
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}
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}
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