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drm/amdgpu: support fill mem for LSDMA

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Support constant data filling 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 14:50:38 -04:00
committed by Alex Deucher
parent f932ffbbf6
commit d9b9aaae3a
3 changed files with 92 additions and 16 deletions
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40
drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c
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@@ -26,6 +26,23 @@
#define AMDGPU_LSDMA_MAX_SIZE 0x2000000ULL
int amdgpu_lsdma_wait_for(struct amdgpu_device *adev,
uint32_t reg_index, uint32_t reg_val,
uint32_t mask)
{
uint32_t val;
int i;
for (i = 0; i < adev->usec_timeout; i++) {
val = RREG32(reg_index);
if ((val & mask) == reg_val)
return 0;
udelay(1);
}
return -ETIME;
}
int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
uint64_t src_addr,
uint64_t dst_addr,
@@ -49,3 +66,26 @@ int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
return 0;
}
int amdgpu_lsdma_fill_mem(struct amdgpu_device *adev,
uint64_t dst_addr,
uint32_t data,
uint64_t mem_size)
{
int ret;
if (mem_size == 0)
return -EINVAL;
while (mem_size > 0) {
uint64_t current_fill_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
ret = adev->lsdma.funcs->fill_mem(adev, dst_addr, data, current_fill_size);
if (ret)
return ret;
dst_addr += current_fill_size;
mem_size -= current_fill_size;
}
return 0;
}