From: Rob Clark robdclark@chromium.org
This doesn't remove *all* the struct_mutex, but it covers the worst of it, ie. shrinker/madvise/free/retire. The submit path still uses struct_mutex, but it still needs *something* serialize a portion of the submit path, and lock_stat mostly just shows the lock contention there being with other submits. And there are a few other bits of struct_mutex usage in less critical paths (debugfs, etc). But this seems like a reasonable step in the right direction.
v2: teach lockdep about shrinker locking patters (danvet) and convert to obj->resv locking (danvet) v3: fix get_vaddr locking for legacy userspace (relocs), devcoredump, and rd/hangrd v4: couple minor review comments (krh), fix deadlock with imported dma-buf's (ie. from v4l2, etc)
Rob Clark (23): drm/msm: Fix a couple incorrect usages of get_vaddr_active() drm/msm/gem: Add obj->lock wrappers drm/msm/gem: Rename internal get_iova_locked helper drm/msm/gem: Move prototypes to msm_gem.h drm/msm/gem: Add some _locked() helpers drm/msm/gem: Move locking in shrinker path drm/msm/submit: Move copy_from_user ahead of locking bos drm/msm: Do rpm get sooner in the submit path drm/msm/gem: Switch over to obj->resv for locking drm/msm: Use correct drm_gem_object_put() in fail case drm/msm: Drop chatty trace drm/msm: Move update_fences() drm/msm: Add priv->mm_lock to protect active/inactive lists drm/msm: Document and rename preempt_lock drm/msm: Protect ring->submits with it's own lock drm/msm: Refcount submits drm/msm: Remove obj->gpu drm/msm: Drop struct_mutex from the retire path drm/msm: Drop struct_mutex in free_object() path drm/msm: Remove msm_gem_free_work drm/msm: Drop struct_mutex in madvise path drm/msm: Drop struct_mutex in shrinker path drm/msm: Don't implicit-sync if only a single ring
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 6 +- drivers/gpu/drm/msm/adreno/a5xx_preempt.c | 12 +- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 6 +- drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c | 1 + drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c | 1 + drivers/gpu/drm/msm/dsi/dsi_host.c | 1 + drivers/gpu/drm/msm/msm_debugfs.c | 7 + drivers/gpu/drm/msm/msm_drv.c | 21 +- drivers/gpu/drm/msm/msm_drv.h | 73 +----- drivers/gpu/drm/msm/msm_fbdev.c | 1 + drivers/gpu/drm/msm/msm_gem.c | 271 +++++++++++----------- drivers/gpu/drm/msm/msm_gem.h | 133 +++++++++-- drivers/gpu/drm/msm/msm_gem_shrinker.c | 81 ++----- drivers/gpu/drm/msm/msm_gem_submit.c | 164 ++++++++----- drivers/gpu/drm/msm/msm_gpu.c | 110 +++++---- drivers/gpu/drm/msm/msm_gpu.h | 5 +- drivers/gpu/drm/msm/msm_rd.c | 2 +- drivers/gpu/drm/msm/msm_ringbuffer.c | 3 +- drivers/gpu/drm/msm/msm_ringbuffer.h | 13 +- 19 files changed, 506 insertions(+), 405 deletions(-)