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drm/amdgpu: add invalidate_page callback for userptrs 

Otherwise we can run into problems with the writeback code.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-03-18 19:29:52 +01:00 committed by Alex Deucher
parent 0d2b42b0bd
commit ae20f12d2d
1 changed files with 72 additions and 26 deletions
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98
drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
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@ -105,6 +105,76 @@ static void amdgpu_mn_release(struct mmu_notifier *mn,
schedule_work(&rmn->work);
}
/**
* amdgpu_mn_invalidate_node - unmap all BOs of a node
*
* @node: the node with the BOs to unmap
*
* We block for all BOs and unmap them by move them
* into system domain again.
*/
static void amdgpu_mn_invalidate_node(struct amdgpu_mn_node *node,
unsigned long start,
unsigned long end)
{
struct amdgpu_bo *bo;
long r;
list_for_each_entry(bo, &node->bos, mn_list) {
if (!amdgpu_ttm_tt_affect_userptr(bo->tbo.ttm, start, end))
continue;
r = amdgpu_bo_reserve(bo, true);
if (r) {
DRM_ERROR("(%ld) failed to reserve user bo\n", r);
continue;
}
r = reservation_object_wait_timeout_rcu(bo->tbo.resv,
true, false, MAX_SCHEDULE_TIMEOUT);
if (r <= 0)
DRM_ERROR("(%ld) failed to wait for user bo\n", r);
amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
if (r)
DRM_ERROR("(%ld) failed to validate user bo\n", r);
amdgpu_bo_unreserve(bo);
}
}
/**
* amdgpu_mn_invalidate_page - callback to notify about mm change
*
* @mn: our notifier
* @mn: the mm this callback is about
* @address: address of invalidate page
*
* Invalidation of a single page. Blocks for all BOs mapping it
* and unmap them by move them into system domain again.
*/
static void amdgpu_mn_invalidate_page(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address)
{
struct amdgpu_mn *rmn = container_of(mn, struct amdgpu_mn, mn);
struct interval_tree_node *it;
mutex_lock(&rmn->lock);
it = interval_tree_iter_first(&rmn->objects, address, address);
if (it) {
struct amdgpu_mn_node *node;
node = container_of(it, struct amdgpu_mn_node, it);
amdgpu_mn_invalidate_node(node, address, address);
}
mutex_unlock(&rmn->lock);
}
/**
* amdgpu_mn_invalidate_range_start - callback to notify about mm change
*
@ -132,36 +202,11 @@ static void amdgpu_mn_invalidate_range_start(struct mmu_notifier *mn,
it = interval_tree_iter_first(&rmn->objects, start, end);
while (it) {
struct amdgpu_mn_node *node;
struct amdgpu_bo *bo;
long r;
node = container_of(it, struct amdgpu_mn_node, it);
it = interval_tree_iter_next(it, start, end);
list_for_each_entry(bo, &node->bos, mn_list) {
if (!amdgpu_ttm_tt_affect_userptr(bo->tbo.ttm, start,
end))
continue;
r = amdgpu_bo_reserve(bo, true);
if (r) {
DRM_ERROR("(%ld) failed to reserve user bo\n", r);
continue;
}
r = reservation_object_wait_timeout_rcu(bo->tbo.resv,
true, false, MAX_SCHEDULE_TIMEOUT);
if (r <= 0)
DRM_ERROR("(%ld) failed to wait for user bo\n", r);
amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
if (r)
DRM_ERROR("(%ld) failed to validate user bo\n", r);
amdgpu_bo_unreserve(bo);
}
amdgpu_mn_invalidate_node(node, start, end);
}
mutex_unlock(&rmn->lock);
@ -169,6 +214,7 @@ static void amdgpu_mn_invalidate_range_start(struct mmu_notifier *mn,
static const struct mmu_notifier_ops amdgpu_mn_ops = {
.release = amdgpu_mn_release,
.invalidate_page = amdgpu_mn_invalidate_page,
.invalidate_range_start = amdgpu_mn_invalidate_range_start,
};