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drm/imagination: vm: prevent duplicate drm_gpuvm_bo instances

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Use drm_gpuvm_bo_obtain() instead of drm_gpuvm_bo_create(). The latter
should only be used in conjunction with drm_gpuvm_bo_obtain_prealloc().

drm_gpuvm_bo_obtain() re-uses existing instances of a given VM and BO
combination, whereas drm_gpuvm_bo_create() would always create a new
instance of struct drm_gpuvm_bo and hence leave us with duplicates.

Fixes: ff5f643de0 ("drm/imagination: Add GEM and VM related code")
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Reviewed-by: Donald Robson <donald.robson@imgtec.com>
Tested-by: Frank Binns <frank.binns@imgtec.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231124233650.152653-2-dakr@redhat.com
This commit is contained in:
Danilo Krummrich
2023-11-25 00:36:36 +01:00
committed by Maxime Ripard
parent 3519d77293
commit 4aa89e8644
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/imagination/pvr_vm.c
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@@ -224,6 +224,7 @@ pvr_vm_bind_op_map_init(struct pvr_vm_bind_op *bind_op,
struct pvr_gem_object *pvr_obj, u64 offset,
u64 device_addr, u64 size)
{
struct drm_gem_object *obj = gem_from_pvr_gem(pvr_obj);
const bool is_user = vm_ctx == vm_ctx->pvr_dev->kernel_vm_ctx;
const u64 pvr_obj_size = pvr_gem_object_size(pvr_obj);
struct sg_table *sgt;
@@ -245,10 +246,11 @@ pvr_vm_bind_op_map_init(struct pvr_vm_bind_op *bind_op,
bind_op->type = PVR_VM_BIND_TYPE_MAP;
bind_op->gpuvm_bo = drm_gpuvm_bo_create(&vm_ctx->gpuvm_mgr,
gem_from_pvr_gem(pvr_obj));
if (!bind_op->gpuvm_bo)
return -ENOMEM;
dma_resv_lock(obj->resv, NULL);
bind_op->gpuvm_bo = drm_gpuvm_bo_obtain(&vm_ctx->gpuvm_mgr, obj);
dma_resv_unlock(obj->resv);
if (IS_ERR(bind_op->gpuvm_bo))
return PTR_ERR(bind_op->gpuvm_bo);
bind_op->new_va = kzalloc(sizeof(*bind_op->new_va), GFP_KERNEL);
bind_op->prev_va = kzalloc(sizeof(*bind_op->prev_va), GFP_KERNEL);