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.vetter@xxxxxxxx>
---
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
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