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| author | Christian König <christian.koenig@amd.com> | 2017-03-13 10:13:38 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-03-29 23:54:01 -0400 |
| commit | dc54d3d1744d23ed0b345fd8bc1c493b74e8df44 (patch) | |
| tree | 7cbdaf7c7edfe9bd86329737fdd5014b747594fd /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | |
| parent | 663e4577a5733fab18d601128f54486d78595bc0 (diff) | |
| download | lwn-dc54d3d1744d23ed0b345fd8bc1c493b74e8df44.tar.gz lwn-dc54d3d1744d23ed0b345fd8bc1c493b74e8df44.zip | |
drm/amdgpu: implement AMDGPU_VA_OP_CLEAR v2
A new VM operation to remove all mappings in a range.
v2: limit unmapped area as noted by Jerry
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 296e985d0b65..b67e94e25cfc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1613,6 +1613,105 @@ int amdgpu_vm_bo_unmap(struct amdgpu_device *adev, } /** + * amdgpu_vm_bo_clear_mappings - remove all mappings in a specific range + * + * @adev: amdgpu_device pointer + * @vm: VM structure to use + * @saddr: start of the range + * @size: size of the range + * + * Remove all mappings in a range, split them as appropriate. + * Returns 0 for success, error for failure. + */ +int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev, + struct amdgpu_vm *vm, + uint64_t saddr, uint64_t size) +{ + struct amdgpu_bo_va_mapping *before, *after, *tmp, *next; + struct interval_tree_node *it; + LIST_HEAD(removed); + uint64_t eaddr; + + eaddr = saddr + size - 1; + saddr /= AMDGPU_GPU_PAGE_SIZE; + eaddr /= AMDGPU_GPU_PAGE_SIZE; + + /* Allocate all the needed memory */ + before = kzalloc(sizeof(*before), GFP_KERNEL); + if (!before) + return -ENOMEM; + + after = kzalloc(sizeof(*after), GFP_KERNEL); + if (!after) { + kfree(before); + return -ENOMEM; + } + + /* Now gather all removed mappings */ + it = interval_tree_iter_first(&vm->va, saddr, eaddr); + while (it) { + tmp = container_of(it, struct amdgpu_bo_va_mapping, it); + it = interval_tree_iter_next(it, saddr, eaddr); + + /* Remember mapping split at the start */ + if (tmp->it.start < saddr) { + before->it.start = tmp->it.start;; + before->it.last = saddr - 1; + before->offset = tmp->offset; + before->flags = tmp->flags; + list_add(&before->list, &tmp->list); + } + + /* Remember mapping split at the end */ + if (tmp->it.last > eaddr) { + after->it.start = eaddr + 1; + after->it.last = tmp->it.last; + after->offset = tmp->offset; + after->offset += after->it.start - tmp->it.start; + after->flags = tmp->flags; + list_add(&after->list, &tmp->list); + } + + list_del(&tmp->list); + list_add(&tmp->list, &removed); + } + + /* And free them up */ + list_for_each_entry_safe(tmp, next, &removed, list) { + interval_tree_remove(&tmp->it, &vm->va); + list_del(&tmp->list); + + if (tmp->it.start < saddr) + tmp->it.start = saddr; + if (tmp->it.last > eaddr) + tmp->it.last = eaddr; + + list_add(&tmp->list, &vm->freed); + trace_amdgpu_vm_bo_unmap(NULL, tmp); + } + + /* Insert partial mapping before the range*/ + if (before->it.start != before->it.last) { + interval_tree_insert(&before->it, &vm->va); + if (before->flags & AMDGPU_PTE_PRT) + amdgpu_vm_prt_get(adev); + } else { + kfree(before); + } + + /* Insert partial mapping after the range */ + if (after->it.start != after->it.last) { + interval_tree_insert(&after->it, &vm->va); + if (after->flags & AMDGPU_PTE_PRT) + amdgpu_vm_prt_get(adev); + } else { + kfree(after); + } + + return 0; +} + +/** * amdgpu_vm_bo_rmv - remove a bo to a specific vm * * @adev: amdgpu_device pointer |