On 07/01/2015 10:25 AM, ankitprasad.r.sharma@xxxxxxxxx wrote:
From: Ankitprasad Sharma <ankitprasad.r.sharma@xxxxxxxxx>
Extend the drm_i915_gem_create structure to add support for
creating Stolen memory backed objects. Added a new flag through
which user can specify the preference to allocate the object from
stolen memory, which if set, an attempt will be made to allocate
the object from stolen memory subject to the availability of
free space in the stolen region.
v2: Rebased to the latest drm-intel-nightly (Ankit)
testcase: igt/gem_stolen
Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sharma@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_dma.c | 3 +++
drivers/gpu/drm/i915/i915_gem.c | 31 +++++++++++++++++++++++++++----
include/uapi/drm/i915_drm.h | 15 +++++++++++++++
3 files changed, 45 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index c5349fa..6045749 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -167,6 +167,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
value = i915.enable_hangcheck &&
intel_has_gpu_reset(dev);
break;
+ case I915_PARAM_CREATE_VERSION:
+ value = 1;
+ break;
default:
DRM_DEBUG("Unknown parameter %d\n", param->param);
return -EINVAL;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a2a4a27..4acf331 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -391,7 +391,8 @@ static int
i915_gem_create(struct drm_file *file,
struct drm_device *dev,
uint64_t size,
- uint32_t *handle_p)
+ uint32_t *handle_p,
+ uint32_t flags)
{
struct drm_i915_gem_object *obj;
int ret;
@@ -401,8 +402,29 @@ i915_gem_create(struct drm_file *file,
if (size == 0)
return -EINVAL;
+ if (flags & ~(I915_CREATE_PLACEMENT_STOLEN))
+ return -EINVAL;
+
/* Allocate the new object */
- obj = i915_gem_alloc_object(dev, size);
+ if (flags & I915_CREATE_PLACEMENT_STOLEN) {
+ mutex_lock(&dev->struct_mutex);
+ obj = i915_gem_object_create_stolen(dev, size);
One more thing here, size is u64 in this function but
i915_gem_object_create_stolen takes u32. Is compiler not noticing this?
(And i915_gem_alloc_object is size_t for a complete win!) :D
Regards,
Tvrtko
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