From: Oscar Mateo Date: Thu, 24 Jul 2014 16:04:16 +0000 (+0100) Subject: drm/i915: Add temporary ring->ctx backpointer X-Git-Tag: firefly_0821_release~176^2~3035^2~73^2~20 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=582d67f0b19afc2299bc8977aba835d8d25bb591;p=firefly-linux-kernel-4.4.55.git drm/i915: Add temporary ring->ctx backpointer The execlist patches have a bit a convoluted and long history and due to that have the actual submission still misplaced deeply burried in the low-level ringbuffer handling code. This design goes back to the legacy ringbuffer code with its tricky lazy request and simple work submissiion using ring tail writes. For that reason they need a ring->ctx backpointer. The goal is to unburry that code and move it up into a level where the full execlist context is available so that we can ditch this backpointer. Until that's done make it really obvious that there's work still to be done. Cc: Oscar Mateo Cc: Thomas Daniel Acked-by: Thomas Daniel Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 6b5f416b5c0d..c2352d1b23fa 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1086,6 +1086,8 @@ int intel_lr_context_deferred_create(struct intel_context *ctx, } ringbuf->ring = ring; + ringbuf->FIXME_lrc_ctx = ctx; + ringbuf->size = 32 * PAGE_SIZE; ringbuf->effective_size = ringbuf->size; ringbuf->head = 0; diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 24437da91f77..26785ca72530 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -99,6 +99,13 @@ struct intel_ringbuffer { struct intel_engine_cs *ring; + /* + * FIXME: This backpointer is an artifact of the history of how the + * execlist patches came into being. It will get removed once the basic + * code has landed. + */ + struct intel_context *FIXME_lrc_ctx; + u32 head; u32 tail; int space;