I have just posted an updated subset of the patch series. Note that one patch has been inserted in the middle and the first one has been dropped. The correct sequence is now: 01 drm/i915: Remove redundant parameter to i915_gem_object_wait_rendering__tail() 02 drm/i915: Ensure OLS & PLR are always in sync 03 drm/i915: Add reference count to request structure 04 drm/i915: Add helper functions to aid seqno -> request transition 05 drm/i915: Replace last_[rwf]_seqno with last_[rwf]_req 06 drm/i915: Ensure requests stick around during waits 07 drm/i915: Remove 'outstanding_lazy_seqno' 08 drm/i915: Make 'i915_gem_check_olr' actually check by request not seqno 09 drm/i915: Convert 'last_flip_req' to be a request not a seqno 10 drm/i915: Convert i915_wait_seqno to i915_wait_request 11 drm/i915: Convert 'i915_add_request' to take a request not a seqno 12 drm/i915: Convert mmio_flip::seqno to struct request 13 drm/i915: Convert 'flip_queued_seqno' into 'flip_queued_request' 14 drm/i915: Connect requests to rings at creation not submission 15 drm/i915: Convert most 'i915_seqno_passed' calls into 'i915_gem_request_completed' 16 drm/i915: Convert __wait_seqno() to __wait_request() 17 drm/i915: Convert trace functions from seqno to request 18 drm/i915: Convert 'trace_irq' to use requests rather than seqnos 19 drm/i915: Convert semaphores to handle requests not seqnos 20 drm/i915: Convert 'ring_idle()' to use requests not seqnos 21 drm/i915: Remove 'obj->ring' 22 drm/i915: Cache request completion status 23 drm/i915: Zero fill the request structure 24 drm/i915: Defer seqno allocation until actual hardware submission time The whole set in its latest and greatest form has also been uploaded to the drm-private git as 'topic/seqno-request'. On 06/10/2014 15:15, John.C.Harrison@Intel.com wrote: > From: John Harrison > > Work in progress for replacing seqno usage with requst structures. > > There is a general feeling that it is better to move away from using a simple > integer 'seqno' value to track batch buffer completion. Instead, the request > structure should be used. That provides for much more flexibility going > forwards. Especially which things like a GPU scheduler (which can re-order batch > buffers and hence seqnos after submission to the hardware), Android sync points > and other such features which potentially make seqno usage more and more > complex. > > The current set of patches do most of the seqno to request structure conversion. > There are still a couple of direct seqno comparisons in the semaphore code. The > final conversion of a seqno test into a 'completed' flag inside the request > structure is still do to as well. Along with whatever changes are required to > maintain such a flag. > > The patches are being posted now to make sure that the various people involved > agree that it is heading in the right direction. > > [Patches against drm-intel-nightly tree fetched 11/09/2014] > > John Harrison (21): > Bug: missing i915_seqno_passed() call? > drm/i915: Remove redundant parameter to i915_gem_object_wait_rendering__tail() > drm/i915: Ensure OLS & PLR are always in sync > drm/i915: Add reference count to request structure > drm/i915: Add helper functions to aid seqno -> request transition > drm/i915: Replace last_[rwf]_seqno with last_[rwf]_req > drm/i915: Ensure requests stick around during waits > drm/i915: Remove 'outstanding_lazy_seqno' > drm/i915: Make 'i915_gem_check_olr' actually check by request not seqno > drm/i915: Convert 'last_flip_req' to be a request not a seqno > drm/i915: Convert i915_wait_seqno to i915_wait_request > drm/i915: Convert 'i915_add_request' to take a request not a seqno > drm/i915: Convert mmio_flip::seqno to struct request > drm/i915: Convert 'flip_queued_seqno' into 'flip_queued_request' > drm/i915: Convert most 'i915_seqno_passed' calls into 'i915_gem_request_completed' > drm/i915: Convert __wait_seqno() to __wait_request() > drm/i915: Convert trace functions from seqno to request > drm/i915: Convert 'trace_irq' to use requests rather than seqnos > drm/i915: Convert semaphores to handle requests not seqnos > drm/i915: Convert 'ring_idle()' to use requests not seqnos > drm/i915: Remove 'obj->ring' > > drivers/gpu/drm/i915/i915_debugfs.c | 23 +-- > drivers/gpu/drm/i915/i915_drv.h | 64 +++++-- > drivers/gpu/drm/i915/i915_gem.c | 265 ++++++++++++++-------------- > drivers/gpu/drm/i915/i915_gem_context.c | 12 +- > drivers/gpu/drm/i915/i915_gem_execbuffer.c | 8 +- > drivers/gpu/drm/i915/i915_gem_gtt.h | 4 +- > drivers/gpu/drm/i915/i915_gem_tiling.c | 2 +- > drivers/gpu/drm/i915/i915_gpu_error.c | 19 +- > drivers/gpu/drm/i915/i915_irq.c | 12 +- > drivers/gpu/drm/i915/i915_trace.h | 47 ++--- > drivers/gpu/drm/i915/intel_display.c | 47 ++--- > drivers/gpu/drm/i915/intel_drv.h | 4 +- > drivers/gpu/drm/i915/intel_lrc.c | 49 ++--- > drivers/gpu/drm/i915/intel_overlay.c | 17 +- > drivers/gpu/drm/i915/intel_ringbuffer.c | 88 +++++---- > drivers/gpu/drm/i915/intel_ringbuffer.h | 24 ++- > 16 files changed, 392 insertions(+), 293 deletions(-) >