From e840130a25a7fbe1520f32b6113e0fd68af0fb54 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 5 Feb 2018 15:24:30 +0000 Subject: [PATCH] drm/i915/execlists: Move the reset bits to a more natural home In preparation for the next patch, we want the engine to appear idle after a reset (if there are no requests in flight). For execlists, this entails clearing the active status on reset, it will be regenerated on restarting the engine after the reset. In the process, note that a couple of other status flags and checks could be moved into the describing function. Signed-off-by: Chris Wilson Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20180205152431.12163-3-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/intel_lrc.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index afc41dbc872e..adf257dfa5e0 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1462,6 +1462,9 @@ static void enable_execlists(struct intel_engine_cs *engine) I915_WRITE(RING_HWS_PGA(engine->mmio_base), engine->status_page.ggtt_offset); POSTING_READ(RING_HWS_PGA(engine->mmio_base)); + + /* Following the reset, we need to reload the CSB read/write pointers */ + engine->execlists.csb_head = -1; } static int gen8_init_common_ring(struct intel_engine_cs *engine) @@ -1478,11 +1481,6 @@ static int gen8_init_common_ring(struct intel_engine_cs *engine) enable_execlists(engine); - GEM_BUG_ON(engine->id >= ARRAY_SIZE(gtiir)); - - execlists->csb_head = -1; - execlists->active = 0; - /* After a GPU reset, we may have requests to replay */ if (execlists->first) tasklet_schedule(&execlists->tasklet); @@ -1528,6 +1526,8 @@ static void reset_irq(struct intel_engine_cs *engine) struct drm_i915_private *dev_priv = engine->i915; int i; + GEM_BUG_ON(engine->id >= ARRAY_SIZE(gtiir)); + /* * Clear any pending interrupt state. * @@ -1576,6 +1576,9 @@ static void reset_common_ring(struct intel_engine_cs *engine, spin_unlock_irqrestore(&engine->timeline->lock, flags); + /* Mark all CS interrupts as complete */ + execlists->active = 0; + /* If the request was innocent, we leave the request in the ELSP * and will try to replay it on restarting. The context image may * have been corrupted by the reset, in which case we may have