drm/i915: Allow relocation deltas outside of target bo
Userspace has a legitimate requirement to use a delta that points to
outside of the target bo, and so we need to enable this. (As this is an
abi break, albeit a relaxation of the current restrictions, mark the change
with a new flag.)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index ffa2196..5115069 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -772,6 +772,9 @@
case I915_PARAM_HAS_EXEC_CONSTANTS:
value = INTEL_INFO(dev)->gen >= 4;
break;
+ case I915_PARAM_HAS_RELAXED_DELTA:
+ value = 1;
+ break;
default:
DRM_DEBUG_DRIVER("Unknown parameter %d\n",
param->param);
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 71a4a3b..1c3b76a 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -350,16 +350,6 @@
return ret;
}
- /* and points to somewhere within the target object. */
- if (unlikely(reloc->delta >= target_obj->size)) {
- DRM_ERROR("Relocation beyond target object bounds: "
- "obj %p target %d delta %d size %d.\n",
- obj, reloc->target_handle,
- (int) reloc->delta,
- (int) target_obj->size);
- return ret;
- }
-
reloc->delta += target_offset;
if (obj->base.write_domain == I915_GEM_DOMAIN_CPU) {
uint32_t page_offset = reloc->offset & ~PAGE_MASK;