[Intel-gfx] [PATCH v3 00/28] Replace seqno values with request structures

[John.C.Harrison at Intel.com]

From: John Harrison <John.C.Harrison at Intel.com>

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.

This patch set does the work of converting most of the driver to use request
structures in preference to seqno values. The only place left that still uses
seqnos is the semaphore code. It was decided to leave that alone for the time
being as the semaphores are hardware based and the hardware only understands
seqno values.

v2: Rebased to newer nightly tree which significantly changed some of the
display MMIO flip code (including making __wait_request public and renaming
it).

v3: Rebased to yet another nightly tree which included execlist pin/unpin
patches. NB: this is based on a tree including a pending update for an unpin
bug. Also includes a fix for a clash with the shrinker.

[Patches against drm-intel-nightly tree fetched 24/11/2014]

John Harrison (28):
  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: Convert i915_gem_ring_throttle to use requests
  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: Add IRQ friendly request deference facility
  drm/i915: Convert mmio_flip::seqno to struct request
  drm/i915: Convert __wait_seqno() to __wait_request()
  drm/i915: Remove obsolete seqno parameter from 'i915_add_request'
  drm/i915: Convert 'flip_queued_seqno' into 'flip_queued_request'
  drm/i915: Convert trace functions from seqno to request
  drm/i915: Convert 'trace_irq' to use requests rather than seqnos
  drm/i915: Convert 'ring_idle()' to use requests not seqnos
  drm/i915: Connect requests to rings at creation not submission
  drm/i915: Convert 'i915_seqno_passed' calls into 'i915_gem_request_completed'
  drm/i915: Remove the now redundant 'obj->ring'
  drm/i915: Cache request completion status
  drm/i915: Zero fill the request structure
  drm/i915: Spinlock protection for request list
  drm/i915: Interrupt driven request completion
  drm/i915: Remove obsolete parameter to i915_gem_request_completed()
  drm/i915: Add unique id to the request structure for debugging
  drm/i915: Additional request structure tracing

 drivers/gpu/drm/i915/i915_debugfs.c          |   20 +-
 drivers/gpu/drm/i915/i915_drv.h              |   97 ++++++--
 drivers/gpu/drm/i915/i915_gem.c              |  323 ++++++++++++++++----------
 drivers/gpu/drm/i915/i915_gem_context.c      |    3 +-
 drivers/gpu/drm/i915/i915_gem_execbuffer.c   |   10 +-
 drivers/gpu/drm/i915/i915_gem_gtt.h          |    4 +-
 drivers/gpu/drm/i915/i915_gem_render_state.c |    2 +-
 drivers/gpu/drm/i915/i915_gem_tiling.c       |    2 +-
 drivers/gpu/drm/i915/i915_gpu_error.c        |    7 +-
 drivers/gpu/drm/i915/i915_irq.c              |   16 +-
 drivers/gpu/drm/i915/i915_trace.h            |   69 +++---
 drivers/gpu/drm/i915/intel_display.c         |   47 ++--
 drivers/gpu/drm/i915/intel_drv.h             |    5 +-
 drivers/gpu/drm/i915/intel_lrc.c             |   72 +++---
 drivers/gpu/drm/i915/intel_overlay.c         |   26 ++-
 drivers/gpu/drm/i915/intel_ringbuffer.c      |   81 ++++---
 drivers/gpu/drm/i915/intel_ringbuffer.h      |   25 +-
 17 files changed, 510 insertions(+), 299 deletions(-)

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1.7.9.5