This series adds new BO allocation flags PANFROST_BO_HEAP and PANFROST_BO_NOEXEC. The heap allocations are paged in on GPU page faults.
Hopefully, this is the last version, but I made a few changes after implementing per FD address spaces on top of this. Primarily, I moved the GPU VA mapping into GEM open/close functions. This is a bit cleaner and will work when we need access to per FD objects.
I also found a problem with how the GPU reset is handled with the MMU. With the move to a threaded irq handler, it's not okay to unmask the MMU at any time as was possible with panfrost_mmu_enable() calls. The result was some consolidation of the reset calls.
Tomeu, I don't think there should be any changes in test results, but I didn't add your tested-by as there are a few too many changes that I felt comfortable with. I did test this with your series.
This is based on drm-misc-next. An updated branch is here[1].
v4: - Move GPU VA mapping/unmapping to GEM open/close - Add rework of reset handling. - Rebased on top of madvise support
v3: - Retain shared irq support, splitting IRQ changes to separate patch (6/8) - Stop leaking SG tables - Prevent mmap and pinning pages for heap BOs
Rob
[1] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git panfrost/heap-noexec
Rob Herring (9): drm/gem: Allow sparsely populated page arrays in drm_gem_put_pages drm/shmem: Put pages independent of a SG table being set drm/panfrost: Restructure the GEM object creation drm/panfrost: Split panfrost_mmu_map SG list mapping to its own function drm/panfrost: Add a no execute flag for BO allocations drm/panfrost: Consolidate reset handling drm/panfrost: Convert MMU IRQ handler to threaded handler drm/panfrost: Add support for GPU heap allocations drm/panfrost: Bump driver version to 1.1
drivers/gpu/drm/drm_gem.c | 3 + drivers/gpu/drm/drm_gem_shmem_helper.c | 4 +- drivers/gpu/drm/panfrost/TODO | 2 - drivers/gpu/drm/panfrost/panfrost_device.c | 16 +- drivers/gpu/drm/panfrost/panfrost_device.h | 1 + drivers/gpu/drm/panfrost/panfrost_drv.c | 65 +++++-- drivers/gpu/drm/panfrost/panfrost_gem.c | 138 ++++++++++--- drivers/gpu/drm/panfrost/panfrost_gem.h | 17 +- drivers/gpu/drm/panfrost/panfrost_job.c | 7 +- drivers/gpu/drm/panfrost/panfrost_mmu.c | 216 +++++++++++++++++---- drivers/gpu/drm/panfrost/panfrost_mmu.h | 3 +- include/uapi/drm/panfrost_drm.h | 3 + 12 files changed, 374 insertions(+), 101 deletions(-)
-- 2.20.1