A GPU memcpy function could alternatively be implemented using MI_*
commands. Provide more detail into how this one operates in case another
memcpy function is created.
v2:
- Update the commit message.
v3:
- Use 'memcpy' instead of 'cpy' (Jason Ekstrand)
- Shorten 'streamout' to 'so'
Suggested-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> (v2)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
In order to get accurate statistics, we need to disable statistics for
blits, clears, and the surface state memcpy at the top of each secondary
command buffer. There are two possible approaches to this:
1) Disable before the blit/memcpy and re-enable afterwards
2) Move emitting 3DSTATE_VF_STATISTICS from initialization and make it
part of pipeline state and then just disabale statistics before
blits and memcpy operations.
Emitting 3DSTATE_VF_STATISTICS should be fairly cheap so it doesn't
really matter which path we take. We choose the second option as it's
more consistent with the way the rest of the statistics are enabled and
disabled.
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
This code is far too complicated to cut and paste.
v2: Update the newly added genX_gpu_memcpy.c; const a few things.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
This method of doing copies has the advantage of touching very little of
the GPU state. While it does disable all the shader stages, it doesn't
have to blow away binding tables, viewports, scissors, or any other bits of
dynamic state other than VBO 32 which is already reserved. All of the
state that it does touch is contained within a pipeline anyway so that's
the only thing that has to be dirtied.
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
