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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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f932ffbbf6
Support memory to memory linear copy in PIO mode for LSDMA. Signed-off-by: Likun Gao <Likun.Gao@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/*
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* Copyright 2022 Advanced Micro Devices, Inc.
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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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "amdgpu.h"
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#include "amdgpu_lsdma.h"
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#define AMDGPU_LSDMA_MAX_SIZE 0x2000000ULL
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int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
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uint64_t src_addr,
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uint64_t dst_addr,
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uint64_t mem_size)
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{
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int ret;
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if (mem_size == 0)
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return -EINVAL;
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while (mem_size > 0) {
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uint64_t current_copy_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
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ret = adev->lsdma.funcs->copy_mem(adev, src_addr, dst_addr, current_copy_size);
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if (ret)
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return ret;
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src_addr += current_copy_size;
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dst_addr += current_copy_size;
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mem_size -= current_copy_size;
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}
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return 0;
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}
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