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drm/amdgpu: support mem copy for LSDMA

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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>
This commit is contained in:
Likun Gao
2022-05-06 14:45:54 -04:00
committed by Alex Deucher
parent 1b49133042
commit f932ffbbf6
3 changed files with 75 additions and 0 deletions
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26
drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c
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@@ -23,3 +23,29 @@
#include "amdgpu.h"
#include "amdgpu_lsdma.h"
#define AMDGPU_LSDMA_MAX_SIZE 0x2000000ULL
int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
uint64_t src_addr,
uint64_t dst_addr,
uint64_t mem_size)
{
int ret;
if (mem_size == 0)
return -EINVAL;
while (mem_size > 0) {
uint64_t current_copy_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
ret = adev->lsdma.funcs->copy_mem(adev, src_addr, dst_addr, current_copy_size);
if (ret)
return ret;
src_addr += current_copy_size;
dst_addr += current_copy_size;
mem_size -= current_copy_size;
}
return 0;
}