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drm/i915: Allow relocation deltas outside of target bo

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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>
This commit is contained in:
Chris Wilson 2011-03-01 15:24:41 +00:00
parent 5d9faa16a7
commit 271d81b841
3 changed files with 4 additions and 10 deletions
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3
drivers/gpu/drm/i915/i915_dma.c
View File

@ -772,6 +772,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
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);

10
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View File

@ -350,16 +350,6 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
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;

1
include/drm/i915_drm.h
View File

@ -290,6 +290,7 @@ typedef struct drm_i915_irq_wait {
#define I915_PARAM_HAS_RELAXED_FENCING 12
#define I915_PARAM_HAS_COHERENT_RINGS 13
#define I915_PARAM_HAS_EXEC_CONSTANTS 14
#define I915_PARAM_HAS_RELAXED_DELTA 15
typedef struct drm_i915_getparam {
int param;