Commit d5f384de authored by Chris Wilson's avatar Chris Wilson Committed by Jani Nikula

drm/i915: Move Braswell stop_machine GGTT insertion workaround

There was a silent conflict between

commit 0a878716
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 14:23:01 2015 +0200

    drm/i915: restore ggtt double-bind avoidance

and

commit 5bab6f60
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Oct 23 18:43:32 2015 +0100

    drm/i915: Serialise updates to GGTT with access through GGTT on Braswell

thankfully caught by the extra WARN safegaurd in 0a878716. Since we now
override the GGTT insert_pages callback when installing the aliasing
ppgtt, we assert that the callback is the original ggtt routine.
However, on Braswell we now use a different insertion routine to
serialise access through the GGTT with updating the PTE and hence the
conflict. To avoid the conflict, move the custom insertion routine for
Braswell down a level.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Michel Thierry <michel.thierry@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447859979-20107-1-git-send-email-chris@chris-wilson.co.ukReviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Cc: drm-intel-fixes@lists.freedesktop.org
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit c140330b)
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
parent 7447a2b2
...@@ -2384,6 +2384,32 @@ static void gen8_ggtt_insert_entries(struct i915_address_space *vm, ...@@ -2384,6 +2384,32 @@ static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
assert_rpm_atomic_end(dev_priv, rpm_atomic_seq); assert_rpm_atomic_end(dev_priv, rpm_atomic_seq);
} }
struct insert_entries {
struct i915_address_space *vm;
struct sg_table *st;
uint64_t start;
enum i915_cache_level level;
u32 flags;
};
static int gen8_ggtt_insert_entries__cb(void *_arg)
{
struct insert_entries *arg = _arg;
gen8_ggtt_insert_entries(arg->vm, arg->st,
arg->start, arg->level, arg->flags);
return 0;
}
static void gen8_ggtt_insert_entries__BKL(struct i915_address_space *vm,
struct sg_table *st,
uint64_t start,
enum i915_cache_level level,
u32 flags)
{
struct insert_entries arg = { vm, st, start, level, flags };
stop_machine(gen8_ggtt_insert_entries__cb, &arg, NULL);
}
/* /*
* Binds an object into the global gtt with the specified cache level. The object * Binds an object into the global gtt with the specified cache level. The object
* will be accessible to the GPU via commands whose operands reference offsets * will be accessible to the GPU via commands whose operands reference offsets
...@@ -2560,26 +2586,6 @@ static int ggtt_bind_vma(struct i915_vma *vma, ...@@ -2560,26 +2586,6 @@ static int ggtt_bind_vma(struct i915_vma *vma,
return 0; return 0;
} }
struct ggtt_bind_vma__cb {
struct i915_vma *vma;
enum i915_cache_level cache_level;
u32 flags;
};
static int ggtt_bind_vma__cb(void *_arg)
{
struct ggtt_bind_vma__cb *arg = _arg;
return ggtt_bind_vma(arg->vma, arg->cache_level, arg->flags);
}
static int ggtt_bind_vma__BKL(struct i915_vma *vma,
enum i915_cache_level cache_level,
u32 flags)
{
struct ggtt_bind_vma__cb arg = { vma, cache_level, flags };
return stop_machine(ggtt_bind_vma__cb, &arg, NULL);
}
static int aliasing_gtt_bind_vma(struct i915_vma *vma, static int aliasing_gtt_bind_vma(struct i915_vma *vma,
enum i915_cache_level cache_level, enum i915_cache_level cache_level,
u32 flags) u32 flags)
...@@ -3048,8 +3054,8 @@ static int gen8_gmch_probe(struct drm_device *dev, ...@@ -3048,8 +3054,8 @@ static int gen8_gmch_probe(struct drm_device *dev,
dev_priv->gtt.base.bind_vma = ggtt_bind_vma; dev_priv->gtt.base.bind_vma = ggtt_bind_vma;
dev_priv->gtt.base.unbind_vma = ggtt_unbind_vma; dev_priv->gtt.base.unbind_vma = ggtt_unbind_vma;
if (IS_CHERRYVIEW(dev)) if (IS_CHERRYVIEW(dev_priv))
dev_priv->gtt.base.bind_vma = ggtt_bind_vma__BKL; dev_priv->gtt.base.insert_entries = gen8_ggtt_insert_entries__BKL;
return ret; return ret;
} }
......
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