Hi Thomas,
Am 30.08.2018 um 08:34 schrieb Thomas Zimmermann:
Hi Christian,
I just wanted to ask if there's something else required to get this
patch set reviewed and landed.
I just need to find some time to review them.
On top of these two patches, I have a patch set that replaces the
driver-specific global-bo-and-mem combos with a single struct ttm_global
structure. It further merges struct drm_global into struct ttm_global
and implements it such that drivers can either share the global memory
That sounds good.
or create their private instance.
That doesn't sounds good. Drivers should not be allowed to create their
own private instance of that.
Thanks for doing this,
Christian.
It's also a step towards drm device
hotplug, which someone just asked.
Best regards
Thomas
Am 13.08.2018 um 12:33 schrieb Christian König:
Yes, please! I had it on my TODO list to clean that up for an eternity.
Actually I never understood why that should be driver work to setup TTM?
I mean can't we just have a module_init/module_exit for TTM?
Thanks,
Christian.
Am 13.08.2018 um 12:24 schrieb Thomas Zimmermann:
TTM uses global memory and BO for backing graphics buffers. These are
represented by struct ttm_mem_global and struct ttm_bo_global.
Currently, struct ttm_bo_global can only be initialized and released
through
struct ttm_bo_global_ref. This is a workaround for passing an instance of
ttm_mem_global to the BO global initialization code.
The use of struct ttm_bo_global_ref makes driver code unnecessary hard to
understand. At the same time drivers can use any combination of memory
and
BO for initializing the global instances. This can result in subtle bugs
when the order of initializing and releasing drivers changes.
As a first step for resolving these problems, the provided patch set
separates initialization and release of struct ttm_bo_global from
struct ttm_bo_global_ref.
The first patch only renames ttm_bo_global_{init/release}. Hopefully this
change can be applied at once for all drivers.
Future directions: All TTM-based drivers follow the same pattern for
setting
up the TTM. In a follow-up patch, this code can be moved into a single
place
and shared among drivers.
Thomas Zimmermann (2):
drm/ttm: Rename ttm_bo_global_{init,release}() to
ttm_bo_global_ref_*()
drm/ttm: Provide ttm_bo_global_{init/release}() for struct
ttm_bo_global
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 +-
drivers/gpu/drm/ast/ast_ttm.c | 4 +-
drivers/gpu/drm/bochs/bochs_mm.c | 4 +-
drivers/gpu/drm/cirrus/cirrus_ttm.c | 4 +-
drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c | 4 +-
drivers/gpu/drm/mgag200/mgag200_ttm.c | 4 +-
drivers/gpu/drm/nouveau/nouveau_ttm.c | 4 +-
drivers/gpu/drm/qxl/qxl_ttm.c | 4 +-
drivers/gpu/drm/radeon/radeon_ttm.c | 4 +-
drivers/gpu/drm/ttm/ttm_bo.c | 12 ++---
drivers/gpu/drm/virtio/virtgpu_ttm.c | 4 +-
drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c | 4 +-
drivers/staging/vboxvideo/vbox_ttm.c | 4 +-
include/drm/ttm/ttm_bo_driver.h | 53 ++++++++++++++++-----
14 files changed, 70 insertions(+), 43 deletions(-)
--
2.18.0
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