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drm/amdkfd: Expose HDP registers to user space

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Introduce a new memory type (KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) and
expose mmio page of HDP registers to user space through this new
memory type.

v2: moved remapped hdp regs to adev struct
v3: rename the new memory type to ALLOC_MEM_FLAGS_MMIO_REMAP
v4: use more generic function name
v5: Fail remapped mmio allocation for asics before gfx9

Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Oak Zeng
2019-04-11 14:43:39 -05:00
committed by Alex Deucher
parent 88807dc8d5
commit d8e408a827
6 changed files with 20 additions and 3 deletions
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7
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
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@@ -1109,7 +1109,8 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
if (!offset || !*offset)
return -EINVAL;
user_addr = *offset;
} else if (flags & ALLOC_MEM_FLAGS_DOORBELL) {
} else if (flags & (ALLOC_MEM_FLAGS_DOORBELL |
ALLOC_MEM_FLAGS_MMIO_REMAP)) {
domain = AMDGPU_GEM_DOMAIN_GTT;
alloc_domain = AMDGPU_GEM_DOMAIN_CPU;
bo_type = ttm_bo_type_sg;
@@ -1294,8 +1295,8 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
/* Free the sync object */
amdgpu_sync_free(&mem->sync);
/* If the SG is not NULL, it's one we created for a doorbell
* BO. We need to free it.
/* If the SG is not NULL, it's one we created for a doorbell or mmio
* remap BO. We need to free it.
*/
if (mem->bo->tbo.sg) {
sg_free_table(mem->bo->tbo.sg);