Hi Thomas,
I am in a situation where i need to allocate vram for the gart table ie
i can't (in fact i can
if i avoid using the memory manager and don't let the manager handle
this part of stolen
vram but i prefer to go throught the allocator if possible) initialize
ttm until i allocated this
vram. I have been looking through call chains in drm_ttm.c and drm_bo.c
and it seems to
me that drm_ttm_init might not be call until ttm is firstly used so i
think i am fine but as
i might have miss some calls i would like your expert stance on this :)
So does this looks good for initialization:
drm_bo_driver_init(dev);
drm_bo_init_mm(dev, DRM_BO_MEM_VRAM, 0, vramsize);
ret = drm_buffer_object_create(dev, gart_table_size, drm_bo_type_kernel,
DRM_BO_FLAG_READ |
DRM_BO_FLAG_WRITE |
DRM_BO_FLAG_MEM_VRAM |
DRM_BO_FLAG_NO_EVICT |
DRM_BO_HINT_DONT_FENCE, 0, 0x1, 0,
&dev_priv->gart_table);
/* now and only now create_ttm_backend_entry can be called */
drm_bo_init_mm(dev, DRM_BO_MEM_TT, 0, numpages);
Cheers,
Jerome Glisse
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