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drm/ttm: convert to unified vma offset manager

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Use the new vma-manager infrastructure. This doesn't change any
implementation details as the vma-offset-manager is nearly copied 1-to-1
from TTM.

The vm_lock is moved into the offset manager so we can drop it from TTM.
During lookup, we use the vma locking helpers to take a reference to the
found object.
In all other scenarios, locking stays the same as before. We always
guarantee that drm_vma_offset_remove() is called only during destruction.
Hence, helpers like drm_vma_node_offset_addr() are always safe as long as
the node has a valid offset.

This also drops the addr_space_offset member as it is a copy of vm_start
in vma_node objects. Use the accessor functions instead.

v4:
 - remove vm_lock
 - use drm_vma_offset_lock_lookup() to protect lookup (instead of vm_lock)

Cc: Dave Airlie <airlied@redhat.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Martin Peres <martin.peres@labri.fr>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
This commit is contained in:
David Herrmann
2013-07-24 21:08:53 +02:00
committed by Dave Airlie
parent 0de23977cf
commit 72525b3f33
14 changed files with 66 additions and 155 deletions
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4
drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
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@@ -500,7 +500,7 @@ int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
goto out_no_dmabuf;
rep->handle = handle;
rep->map_handle = dma_buf->base.addr_space_offset;
rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node);
rep->cur_gmr_id = handle;
rep->cur_gmr_offset = 0;
@@ -834,7 +834,7 @@ int vmw_dumb_map_offset(struct drm_file *file_priv,
if (ret != 0)
return -EINVAL;
*offset = out_buf->base.addr_space_offset;
*offset = drm_vma_node_offset_addr(&out_buf->base.vma_node);
vmw_dmabuf_unreference(&out_buf);
return 0;
}