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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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1
drivers/gpu/drm/amd/include/kgd_kfd_interface.h
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@@ -174,6 +174,7 @@ struct tile_config {
#define ALLOC_MEM_FLAGS_GTT (1 << 1)
#define ALLOC_MEM_FLAGS_USERPTR (1 << 2)
#define ALLOC_MEM_FLAGS_DOORBELL (1 << 3)
#define ALLOC_MEM_FLAGS_MMIO_REMAP (1 << 4)
/*
* Allocation flags attributes/access options.