On Wed, Jul 30, 2014 at 08:46:11PM -0700, Ben Widawsky wrote:
> <1386367941-7131-76-git-send-email-benjamin.widaw...@intel.com>
and
<1386367941-7131-81-git-send-email-benjamin.widaw...@intel.com>
>
> On Wed, Jul 30, 2014 at 09:42:02PM +0200, Daniel Vetter wrote:
> > Stuffing this into the context setup code doesn't make a lot of sense.
> > Also reusing the real ppgtt setup code makes even less sense since the
> > aliasing ppgtt isn't a real address space. Leaving all that stuff
> > unitialized will make sure that we catch any abusers promptly.
> >
> > This is also a prep work to clean up the context->ppgtt link.
> >
> > Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch>
> > ---
> > drivers/gpu/drm/i915/i915_gem_context.c | 13 +------------
> > drivers/gpu/drm/i915/i915_gem_gtt.c | 31
> > +++++++++++++++++++++++++------
> > 2 files changed, 26 insertions(+), 18 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_gem_context.c
> > b/drivers/gpu/drm/i915/i915_gem_context.c
> > index 3b8367aa8404..7a455fcee3a7 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_context.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> > @@ -276,17 +276,6 @@ i915_gem_create_context(struct drm_device *dev,
> > goto err_unpin;
> > } else
> > ctx->vm = &ppgtt->base;
> > -
> > - /* This case is reserved for the global default context and
> > - * should only happen once. */
> > - if (is_global_default_ctx) {
> > - if (WARN_ON(dev_priv->mm.aliasing_ppgtt)) {
> > - ret = -EEXIST;
> > - goto err_unpin;
> > - }
> > -
> > - dev_priv->mm.aliasing_ppgtt = ppgtt;
> > - }
> > } else if (USES_PPGTT(dev)) {
> > /* For platforms which only have aliasing PPGTT, we fake the
> > * address space and refcounting. */
> > @@ -361,7 +350,7 @@ int i915_gem_context_init(struct drm_device *dev)
> > }
> > }
> >
> > - ctx = i915_gem_create_context(dev, NULL, USES_PPGTT(dev));
> > + ctx = i915_gem_create_context(dev, NULL, USES_FULL_PPGTT(dev));
> > if (IS_ERR(ctx)) {
> > DRM_ERROR("Failed to create default global context (error
> > %ld)\n",
> > PTR_ERR(ctx));
> > diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > index 4fa7807ed4d5..cb9bb13ff20a 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > @@ -1191,23 +1191,27 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt
> > *ppgtt)
> > return 0;
> > }
> >
> > -int i915_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
> > +int __hw_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
> > {
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > - int ret = 0;
> >
> > ppgtt->base.dev = dev;
> > ppgtt->base.scratch = dev_priv->gtt.base.scratch;
> >
> > if (INTEL_INFO(dev)->gen < 8)
> > - ret = gen6_ppgtt_init(ppgtt);
> > + return gen6_ppgtt_init(ppgtt);
> > else if (IS_GEN8(dev))
> > - ret = gen8_ppgtt_init(ppgtt, dev_priv->gtt.base.total);
> > + return gen8_ppgtt_init(ppgtt, dev_priv->gtt.base.total);
> > else
> > BUG();
> > +}
> > +int i915_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
> > +{
> > + struct drm_i915_private *dev_priv = dev->dev_private;
> > + int ret = 0;
> >
> > + ret = __hw_ppgtt_init(dev, ppgtt);
> > if (!ret) {
> > - struct drm_i915_private *dev_priv = dev->dev_private;
> > kref_init(&ppgtt->ref);
> > drm_mm_init(&ppgtt->base.mm, ppgtt->base.start,
> > ppgtt->base.total);
> > @@ -1728,6 +1732,7 @@ int i915_gem_setup_global_gtt(struct drm_device *dev,
> > struct drm_mm_node *entry;
> > struct drm_i915_gem_object *obj;
> > unsigned long hole_start, hole_end;
> > + int ret;
> >
> > BUG_ON(mappable_end > end);
> >
> > @@ -1739,7 +1744,7 @@ int i915_gem_setup_global_gtt(struct drm_device *dev,
> > /* Mark any preallocated objects as occupied */
> > list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
> > struct i915_vma *vma = i915_gem_obj_to_vma(obj, ggtt_vm);
> > - int ret;
> > +
> > DRM_DEBUG_KMS("reserving preallocated space: %lx + %zx\n",
> > i915_gem_obj_ggtt_offset(obj), obj->base.size);
> >
> > @@ -1766,6 +1771,20 @@ int i915_gem_setup_global_gtt(struct drm_device *dev,
> > /* And finally clear the reserved guard page */
> > ggtt_vm->clear_range(ggtt_vm, end - PAGE_SIZE, PAGE_SIZE, true);
> >
> > + if (HAS_ALIASING_PPGTT(dev) && USES_FULL_PPGTT(dev)) {
> > + struct i915_hw_ppgtt *ppgtt;
> > +
> > + ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
> > + if (!ppgtt)
> > + return -ENOMEM;
> > +
> > + ret = __hw_ppgtt_init(dev, ppgtt);
> > + if (!ret)
> > + return ret;
> > +
> > + dev_priv->mm.aliasing_ppgtt = ppgtt;
> > + }
> > +
> > return 0;
> > }
> >
> > --
> > 1.9.3
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Ben Widawsky, Intel Open Source Technology Center
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ben Widawsky, Intel Open Source Technology Center
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