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drm/amdkfd: allocate MMIO/DOORBELL BOs with AMDGPU_GEM_CREATE_PREEMPTIBLE

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MMIO/DOORBELL BOs' backing resources(bus address resources that are
used to talk to the GPU) are not managed by GTT manager, but they
are counted by GTT manager. That makes no sense.

With AMDGPU_GEM_CREATE_PREEMPTIBLE flag, such BOs will be managed by
PREEMPT manager(for preemptible contexts, e.g., KFD). Then they won't
be evicted and don't need to be pinned as well.

But we still leave these BOs pinned to indicate that the underlying
resource never moves.

Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lang Yu 2022-05-11 15:37:27 +08:00 • committed by Alex Deucher
parent b992a19085
commit 7226f40af6
1 changed files with 16 additions and 16 deletions
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32
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
View file

@ -1518,26 +1518,26 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
} else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_GTT) {
domain = alloc_domain = AMDGPU_GEM_DOMAIN_GTT;
alloc_flags = 0;
} else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
} else {
domain = AMDGPU_GEM_DOMAIN_GTT;
alloc_domain = AMDGPU_GEM_DOMAIN_CPU;
alloc_flags = AMDGPU_GEM_CREATE_PREEMPTIBLE;
if (!offset || !*offset)
if (flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
if (!offset || !*offset)
return -EINVAL;
user_addr = untagged_addr(*offset);
} else if (flags & (KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL |
KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)) {
bo_type = ttm_bo_type_sg;
if (size > UINT_MAX)
return -EINVAL;
sg = create_doorbell_sg(*offset, size);
if (!sg)
return -ENOMEM;
} else {
return -EINVAL;
user_addr = untagged_addr(*offset);
} else if (flags & (KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL |
KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)) {
domain = AMDGPU_GEM_DOMAIN_GTT;
alloc_domain = AMDGPU_GEM_DOMAIN_CPU;
bo_type = ttm_bo_type_sg;
alloc_flags = 0;
if (size > UINT_MAX)
return -EINVAL;
sg = create_doorbell_sg(*offset, size);
if (!sg)
return -ENOMEM;
} else {
return -EINVAL;
}
}
*mem = kzalloc(sizeof(struct kgd_mem), GFP_KERNEL);