From a95f6a007042e76627d9722cb1a81f97c718f74b Mon Sep 17 00:00:00 2001 From: Mika Kuoppala Date: Fri, 14 Mar 2014 16:22:10 +0200 Subject: [PATCH] drm/i915: Switch to fake context on older gens We used to have per file descriptor hang stats for the i915_get_reset_stats_ioctl() and for default context banning. commit 0eea67eb26000657079b7fc41079097942339452 Author: Ben Widawsky Date: Fri Dec 6 14:11:19 2013 -0800 drm/i915: Create a per file_priv default context made having separate hangstats in file_private redundant as i915_hw_context already contained hangstats. So commit c482972a086e03e6a6d27e4f7af2d868bf659648 Author: Ben Widawsky Date: Fri Dec 6 14:11:20 2013 -0800 drm/i915: Piggy back hangstats off of contexts consolidated the hangstats and enabled further improvements. commit 44e2c0705a19e09d7b0f30a591f92e473e5ef89e Author: Mika Kuoppala Date: Thu Jan 30 16:01:15 2014 +0200 drm/i915: Use i915_hw_context to set reset stats tried to reap full benefits of consolidation but fell short as we never 'switch' to the fake private context on gens that don't have hw_contexts, so request->ctx remained NULL on those. Fix this by 'switching' to fake context so that when request is submitted to ring, proper context gets assigned to it. Testcase: igt/drv_hangman Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76055 Signed-off-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_context.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index ce41cff84346..b5a58372eb06 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -775,9 +775,11 @@ int i915_switch_context(struct intel_ring_buffer *ring, BUG_ON(file && to == NULL); - /* We have the fake context, but don't supports switching. */ - if (!HAS_HW_CONTEXTS(ring->dev)) + /* We have the fake context */ + if (!HAS_HW_CONTEXTS(ring->dev)) { + ring->last_context = to; return 0; + } return do_switch(ring, to); } -- 2.39.5