On Mon, Oct 06, 2014 at 03:15:18PM +0100, john.c.harri...@intel.com wrote:
> From: John Harrison <john.c.harri...@intel.com>
Again on the topic of thin commit message: Some additional words about why
we can noodle around in request structures from hardirq context (those
fields are invariant after add_request) would be good. Since with the
scheduler a lot of that stuff suddenly is a lot less invariant (if we
delay the seqno allocation until we emit requests, which I'm pretty sure
we have to for a bunch of reasons).
>
> For: VIZ-4377
> Signed-off-by: john.c.harri...@intel.com
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 4 ++--
> drivers/gpu/drm/i915/intel_display.c | 9 ++++++---
> drivers/gpu/drm/i915/intel_drv.h | 2 +-
> 3 files changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 726a8f0..52ddd19 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -547,11 +547,11 @@ static int i915_gem_pageflip_info(struct seq_file *m,
> void *data)
> if (work->flip_queued_ring) {
> seq_printf(m, "Flip queued on %s at seqno %u,
> next seqno %u [current breadcrumb %u], completed? %d\n",
> work->flip_queued_ring->name,
> - work->flip_queued_seqno,
> +
> i915_gem_request_get_seqno(work->flip_queued_req),
> dev_priv->next_seqno,
>
> work->flip_queued_ring->get_seqno(work->flip_queued_ring, true),
>
> i915_seqno_passed(work->flip_queued_ring->get_seqno(work->flip_queued_ring,
> true),
> -
> work->flip_queued_seqno));
> +
> i915_gem_request_get_seqno(work->flip_queued_req)));
Yeah it's no your patch, but this stuff has defintely fallen over the
edge. A prep patch to extract some helper functions to bring sanity to
i915_gem_pageflip_info's indentation levels is needed here imo.
-Daniel
> } else
> seq_printf(m, "Flip not associated with any
> ring\n");
> seq_printf(m, "Flip queued on frame %d, (was ready on
> frame %d), now %d\n",
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index f13bc30..26fdd96 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9879,7 +9879,7 @@ static bool __intel_pageflip_stall_check(struct
> drm_device *dev,
> if (work->flip_ready_vblank == 0) {
> if (work->flip_queued_ring &&
>
> !i915_seqno_passed(work->flip_queued_ring->get_seqno(work->flip_queued_ring,
> true),
> - work->flip_queued_seqno))
> +
> i915_gem_request_get_seqno(work->flip_queued_req)))
> return false;
>
> work->flip_ready_vblank = drm_vblank_count(dev,
> intel_crtc->pipe);
> @@ -10047,7 +10047,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
> if (ret)
> goto cleanup_unpin;
>
> - work->flip_queued_seqno =
> i915_gem_request_get_seqno(obj->last_write_req);
> + work->flip_queued_req = obj->last_write_req;
> work->flip_queued_ring = obj->ring;
> } else {
> ret = dev_priv->display.queue_flip(dev, crtc, fb, obj, ring,
> @@ -10055,10 +10055,13 @@ static int intel_crtc_page_flip(struct drm_crtc
> *crtc,
> if (ret)
> goto cleanup_unpin;
>
> - work->flip_queued_seqno =
> i915_gem_request_get_seqno(intel_ring_get_request(ring));
> + work->flip_queued_req = intel_ring_get_request(ring);
> work->flip_queued_ring = ring;
> }
>
> + if (work->flip_queued_req)
> + i915_gem_request_reference(work->flip_queued_req);
> +
> work->flip_queued_vblank = drm_vblank_count(dev, intel_crtc->pipe);
> work->enable_stall_check = true;
>
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 418ac13..cb5af63 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -687,7 +687,7 @@ struct intel_unpin_work {
> u32 flip_count;
> u32 gtt_offset;
> struct intel_engine_cs *flip_queued_ring;
> - u32 flip_queued_seqno;
> + struct drm_i915_gem_request *flip_queued_req;
> int flip_queued_vblank;
> int flip_ready_vblank;
> bool enable_stall_check;
> --
> 1.7.9.5
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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