diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c')
-rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c index af00a66f8282..996722fac60c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c @@ -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; +} |