Hi Daniel, On Friday 03 Mar 2017 11:04:33 Daniel Vetter wrote: > On Thu, Mar 02, 2017 at 01:44:32PM -0800, Laura Abbott wrote: > > Hi, > > > > There's been some recent discussions[1] about Ion-like frameworks. There's > > apparently interest in just keeping Ion since it works reasonablly well. > > This series does what should be the final clean ups for it to possibly be > > moved out of staging. > > > > This includes the following: > > - Some general clean up and removal of features that never got a lot of > > use as far as I can tell. > > > > - Fixing up the caching. This is the series I proposed back in December[2] > > but never heard any feedback on. It will certainly break existing > > applications that rely on the implicit caching. I'd rather make an > > effort to move to a model that isn't going directly against the > > establishement though. > > > > - Fixing up the platform support. The devicetree approach was never well > > recieved by DT maintainers. The proposal here is to think of Ion less as > > specifying requirements and more of a framework for exposing memory to > > userspace. > > > > - CMA allocations now happen without the need of a dummy device structure. > > This fixes a bunch of the reasons why I attempted to add devicetree > > support before. > > > > I've had problems getting feedback in the past so if I don't hear any > > major objections I'm going to send out with the RFC dropped to be picked > > up. The only reason there isn't a patch to come out of staging is to > > discuss any other changes to the ABI people might want. Once this comes > > out of staging, I really don't want to mess with the ABI. > > > > Feedback appreciated. > > Imo looks all good. And I just realized that cross-checking with the TODO, > the 2 items about _CUSTOM and _IMPORT ioctls I noted are already there. > > Otherwise I looked through the patches, looks all really reasonable. Two more items that need to be addressed in my opinion : - Let's not export the ion_client API, we don't want drivers to be ion- specific. Only the dma-buf interface should be visible to drivers. - I haven't seen any proposal how a heap-based solution could be used in a generic distribution. This needs to be figured out before committing to any API/ABI. > Wrt merging, my experience from destaging the android syncpt stuff was > that merging the patches through the staging tree lead to lots of > cross-tree issues with the gpu folks wanting to use that. Ion will > probably run into similar things, so I'd propose we pull these cleanup > patches and the eventual de-staging in throught drm. Yes that defacto > means I'm also volunteering myself a bit :-) > > In the end we could put it all into drivers/gpu/ion or something like > that. > > Thoughts? Greg? > -Daniel > > > Thanks, > > Laura > > > > [1] https://marc.info/?l=linux-kernel&m=148699712602105&w=2 > > [2] https://marc.info/?l=linaro-mm-sig&m=148176050802908&w=2 > > > > Laura Abbott (12): > > staging: android: ion: Remove dmap_cnt > > staging: android: ion: Remove alignment from allocation field > > staging: android: ion: Duplicate sg_table > > staging: android: ion: Call dma_map_sg for syncing and mapping > > staging: android: ion: Remove page faulting support > > staging: android: ion: Remove crufty cache support > > staging: android: ion: Remove old platform support > > cma: Store a name in the cma structure > > cma: Introduce cma_for_each_area > > staging: android: ion: Use CMA APIs directly > > staging: android: ion: Make Ion heaps selectable > > staging; android: ion: Enumerate all available heaps > > > > drivers/base/dma-contiguous.c | 5 +- > > drivers/staging/android/ion/Kconfig | 51 ++-- > > drivers/staging/android/ion/Makefile | 14 +- > > drivers/staging/android/ion/hisilicon/Kconfig | 5 - > > drivers/staging/android/ion/hisilicon/Makefile | 1 - > > drivers/staging/android/ion/hisilicon/hi6220_ion.c | 113 --------- > > drivers/staging/android/ion/ion-ioctl.c | 6 - > > drivers/staging/android/ion/ion.c | 282 > > ++++++--------------- drivers/staging/android/ion/ion.h > > | 5 +- > > drivers/staging/android/ion/ion_carveout_heap.c | 16 +- > > drivers/staging/android/ion/ion_chunk_heap.c | 15 +- > > drivers/staging/android/ion/ion_cma_heap.c | 102 ++------ > > drivers/staging/android/ion/ion_dummy_driver.c | 156 ------------ > > drivers/staging/android/ion/ion_enumerate.c | 89 +++++++ > > drivers/staging/android/ion/ion_of.c | 184 -------------- > > drivers/staging/android/ion/ion_of.h | 37 --- > > drivers/staging/android/ion/ion_page_pool.c | 3 - > > drivers/staging/android/ion/ion_priv.h | 57 ++++- > > drivers/staging/android/ion/ion_system_heap.c | 14 +- > > drivers/staging/android/ion/tegra/Makefile | 1 - > > drivers/staging/android/ion/tegra/tegra_ion.c | 80 ------ > > include/linux/cma.h | 6 +- > > mm/cma.c | 25 +- > > mm/cma.h | 1 + > > mm/cma_debug.c | 2 +- > > 25 files changed, 312 insertions(+), 958 deletions(-) > > delete mode 100644 drivers/staging/android/ion/hisilicon/Kconfig > > delete mode 100644 drivers/staging/android/ion/hisilicon/Makefile > > delete mode 100644 drivers/staging/android/ion/hisilicon/hi6220_ion.c > > delete mode 100644 drivers/staging/android/ion/ion_dummy_driver.c > > create mode 100644 drivers/staging/android/ion/ion_enumerate.c > > delete mode 100644 drivers/staging/android/ion/ion_of.c > > delete mode 100644 drivers/staging/android/ion/ion_of.h > > delete mode 100644 drivers/staging/android/ion/tegra/Makefile > > delete mode 100644 drivers/staging/android/ion/tegra/tegra_ion.c -- Regards, Laurent Pinchart
