On Wed, May 07, 2014 at 09:55:49AM +0200, Daniel Vetter wrote:
> On Tue, May 06, 2014 at 10:21:35PM -0700, Ben Widawsky wrote:
> > This will be useful for some upcoming patches which do more platform
> > specific work. Having it in one central place just makes things a bit
> > cleaner and easier.
> >
> > There is a small functional change here. There are more calls to the
> > tracepoints.
> >
> > NOTE: I didn't actually end up using this patch for the intended purpose, but I
> > thought it was a nice patch to keep around.
> >
> > v2: s/i915_gem_bind_vma/i915_gem_vma_bind/
> > s/i915_gem_unbind_vma/i915_gem_vma_unbind/
> > (Chris)
> >
> > v3: Missed one spot
> >
> > Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx>
>
> You change the semantics of the vma bind/unbind tracepoints - previously
> they've meant we reserve/unreserve a ppgtt address for an object, not
> they're called every time we touch the ptes (which is what
> vma_bind|unbind actually do). That doesn't look too terribly useful for
> tracing any more.
>
> What's the use case for these added tracepoints?
> -Daniel
>
You're right. The tracepoint is incredibly useful for debug purposes,
but not as an actual tracepoint. The current tracepoint is badly named,
IMO, but that's fine. I am not sure it's worth fixing though, since
nobody has really spoken up for the patch.
> > ---
> > drivers/gpu/drm/i915/i915_drv.h | 3 +++
> > drivers/gpu/drm/i915/i915_gem.c | 13 ++++++-------
> > drivers/gpu/drm/i915/i915_gem_context.c | 2 +-
> > drivers/gpu/drm/i915/i915_gem_execbuffer.c | 5 +++--
> > drivers/gpu/drm/i915/i915_gem_gtt.c | 16 ++++++++++++++--
> > 5 files changed, 27 insertions(+), 12 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index c1d2bea..30cde3d 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -2264,6 +2264,9 @@ bool i915_gem_obj_bound(struct drm_i915_gem_object *o,
> > struct i915_address_space *vm);
> > unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o,
> > struct i915_address_space *vm);
> > +void i915_gem_vma_bind(struct i915_vma *vma, enum i915_cache_level,
> > + unsigned flags);
> > +void i915_gem_vma_unbind(struct i915_vma *vma);
> > struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
> > struct i915_address_space *vm);
> > struct i915_vma *
> > diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> > index e9599e9..1567911 100644
> > --- a/drivers/gpu/drm/i915/i915_gem.c
> > +++ b/drivers/gpu/drm/i915/i915_gem.c
> > @@ -2771,7 +2771,7 @@ int i915_vma_unbind(struct i915_vma *vma)
> >
> > trace_i915_vma_unbind(vma);
> >
> > - vma->unbind_vma(vma);
> > + i915_gem_vma_unbind(vma);
> >
> > i915_gem_gtt_finish_object(obj);
> >
> > @@ -3342,9 +3342,8 @@ i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj,
> >
> > WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable);
> >
> > - trace_i915_vma_bind(vma, flags);
> > - vma->bind_vma(vma, obj->cache_level,
> > - flags & (PIN_MAPPABLE | PIN_GLOBAL) ? GLOBAL_BIND : 0);
> > + i915_gem_vma_bind(vma, obj->cache_level,
> > + flags & (PIN_MAPPABLE | PIN_GLOBAL) ? GLOBAL_BIND : 0);
> >
> > i915_gem_verify_gtt(dev);
> > return vma;
> > @@ -3548,8 +3547,8 @@ int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
> >
> > list_for_each_entry(vma, &obj->vma_list, vma_link)
> > if (drm_mm_node_allocated(&vma->node))
> > - vma->bind_vma(vma, cache_level,
> > - obj->has_global_gtt_mapping ? GLOBAL_BIND : 0);
> > + i915_gem_vma_bind(vma, cache_level,
> > + obj->has_global_gtt_mapping ? GLOBAL_BIND : 0);
> > }
> >
> > list_for_each_entry(vma, &obj->vma_list, vma_link)
> > @@ -3914,7 +3913,7 @@ i915_gem_object_pin(struct drm_i915_gem_object *obj,
> > }
> >
> > if (flags & PIN_GLOBAL && !obj->has_global_gtt_mapping)
> > - vma->bind_vma(vma, obj->cache_level, GLOBAL_BIND);
> > + i915_gem_vma_bind(vma, obj->cache_level, GLOBAL_BIND);
> >
> > vma->pin_count++;
> > if (flags & PIN_MAPPABLE)
> > diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
> > index f77b4c1..00c7d88 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_context.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> > @@ -655,7 +655,7 @@ static int do_switch(struct intel_ring_buffer *ring,
> > if (!to->obj->has_global_gtt_mapping) {
> > struct i915_vma *vma = i915_gem_obj_to_vma(to->obj,
> > &dev_priv->gtt.base);
> > - vma->bind_vma(vma, to->obj->cache_level, GLOBAL_BIND);
> > + i915_gem_vma_bind(vma, to->obj->cache_level, GLOBAL_BIND);
> > }
> >
> > if (!to->is_initialized || i915_gem_context_is_default(to))
> > diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> > index 6cc004f..211bbbd 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> > @@ -369,7 +369,8 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
> > struct i915_vma *vma =
> > list_first_entry(&target_i915_obj->vma_list,
> > typeof(*vma), vma_link);
> > - vma->bind_vma(vma, target_i915_obj->cache_level, GLOBAL_BIND);
> > + i915_gem_vma_bind(vma, target_i915_obj->cache_level,
> > + GLOBAL_BIND);
> > }
> >
> > /* Validate that the target is in a valid r/w GPU domain */
> > @@ -1266,7 +1267,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
> > * allocate space first */
> > struct i915_vma *vma = i915_gem_obj_to_ggtt(batch_obj);
> > BUG_ON(!vma);
> > - vma->bind_vma(vma, batch_obj->cache_level, GLOBAL_BIND);
> > + i915_gem_vma_bind(vma, batch_obj->cache_level, GLOBAL_BIND);
> > }
> >
> > if (flags & I915_DISPATCH_SECURE)
> > diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > index 79ae83b..a66cb6a 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > @@ -1319,10 +1319,9 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev)
> > * without telling our object about it. So we need to fake it.
> > */
> > obj->has_global_gtt_mapping = 0;
> > - vma->bind_vma(vma, obj->cache_level, GLOBAL_BIND);
> > + i915_gem_vma_bind(vma, obj->cache_level, GLOBAL_BIND);
> > }
> >
> > -
> > if (INTEL_INFO(dev)->gen >= 8) {
> > gen8_setup_private_ppat(dev_priv);
> > return;
> > @@ -1986,6 +1985,19 @@ int i915_gem_gtt_init(struct drm_device *dev)
> > return 0;
> > }
> >
> > +void i915_gem_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
> > + unsigned flags)
> > +{
> > + trace_i915_vma_bind(vma, flags);
> > + vma->bind_vma(vma, cache_level, flags);
> > +}
> > +
> > +void i915_gem_vma_unbind(struct i915_vma *vma)
> > +{
> > + trace_i915_vma_unbind(vma);
> > + vma->unbind_vma(vma);
> > +}
> > +
> > static struct i915_vma *__i915_gem_vma_create(struct drm_i915_gem_object *obj,
> > struct i915_address_space *vm)
> > {
> > --
> > 1.9.2
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch
--
Ben Widawsky, Intel Open Source Technology Center
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