mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
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61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/*
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* Copyright (c) 2019, 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/bug.h>
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#include <nvgpu/vidmem.h>
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#include <nvgpu/nvgpu_mem.h>
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#include <nvgpu/nvgpu_sgt.h>
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#include <nvgpu/page_allocator.h>
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#include <nvgpu/posix/posix_vidmem.h>
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bool nvgpu_addr_is_vidmem_page_alloc(u64 addr)
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{
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return ((addr & 1ULL) != 0ULL);
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}
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void nvgpu_vidmem_set_page_alloc(struct nvgpu_mem_sgl *sgl, u64 addr)
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{
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/* set bit 0 to indicate vidmem allocation */
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sgl->dma = (addr | 1ULL);
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sgl->phys = (addr | 1ULL);
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}
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struct nvgpu_page_alloc *nvgpu_vidmem_get_page_alloc(struct nvgpu_mem_sgl *sgl)
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{
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u64 addr;
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addr = sgl->dma;
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if (nvgpu_addr_is_vidmem_page_alloc(addr))
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addr = addr & ~1ULL;
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else
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WARN_ON(true);
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return (struct nvgpu_page_alloc *)(uintptr_t)addr;
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}
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void nvgpu_mem_free_vidmem_alloc(struct gk20a *g, struct nvgpu_mem *vidmem)
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{
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BUG();
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}
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