On Tuesday 04 March 2014, 02:08:58, Marek Olšák wrote:
Could you please do this without changing u_upload_mgr? You can still
use u_upload_alloc to allocate buffer memory in the driver and the map
buffer read/write flags are not important with persistent coherent
buffer mappings anyway.
Since
You can try to do the allocation of the staging buffer with
pipe_buffer_create instead of u_upload_mgr. You can also use
u_suballocator, which is like a stripped out version of u_upload_mgr.
You would need another instance of u_upload_mgr anyway, because we'd
like to continue using
Could you please do this without changing u_upload_mgr? You can still
use u_upload_alloc to allocate buffer memory in the driver and the map
buffer read/write flags are not important with persistent coherent
buffer mappings anyway.
I have sent an updated patch to the list.
Ole
Using the DMA engine for buffer downloads vastly improves performance. This is
because reads from VRAM by the CPU are slow because of the high latency of the
PCIe bus.
The first patch allows u_upload_mgr to be used for downloads, too. The second
patch then uses u_upload_mgr in the radeon driver
Could you please do this without changing u_upload_mgr? You can still
use u_upload_alloc to allocate buffer memory in the driver and the map
buffer read/write flags are not important with persistent coherent
buffer mappings anyway.
Marek
On Mon, Mar 3, 2014 at 9:29 PM, Niels Ole Salscheider
