lib: Restore gem_available_aperture_size()

Missed an error whilst rebasing and trying to modify the previous patch
to keep this function intact... Instead, I now have to add this patch to
restore gem_available_aperture_size() and its one usage.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

2 files changed, 20 insertions, 0 deletions

diff --git a/lib/ioctl_wrappers.c b/lib/ioctl_wrappers.c
index a222e1b0..de56e42d 100644
--- a/lib/ioctl_wrappers.c
+++ b/lib/ioctl_wrappers.c
@@ -1226,6 +1226,25 @@ bool gem_has_bsd2(int fd)
 		has_bsd2 = gem_has_enable_ring(fd,LOCAL_I915_PARAM_HAS_BSD2);
 	return has_bsd2;
 }
+/**
+ * gem_available_aperture_size:
+ * @fd: open i915 drm file descriptor
+ *
+ * Feature test macro to query the kernel for the available gpu aperture size
+ * usable in a batchbuffer.
+ *
+ * Returns: The available gtt address space size.
+ */
+uint64_t gem_available_aperture_size(int fd)
+{
+	struct drm_i915_gem_get_aperture aperture;
+
+	memset(&aperture, 0, sizeof(aperture));
+	aperture.aper_size = 256*1024*1024;
+	do_ioctl(fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
+
+	return aperture.aper_available_size;
+}
 
 /**
  * gem_aperture_size:
diff --git a/lib/ioctl_wrappers.h b/lib/ioctl_wrappers.h
index 691dc013..4683ff5f 100644
--- a/lib/ioctl_wrappers.h
+++ b/lib/ioctl_wrappers.h
@@ -143,6 +143,7 @@ int gem_gtt_type(int fd);
 bool gem_uses_ppgtt(int fd);
 bool gem_uses_full_ppgtt(int fd);
 int gem_available_fences(int fd);
+uint64_t gem_available_aperture_size(int fd);
 uint64_t gem_aperture_size(int fd);
 uint64_t gem_global_aperture_size(int fd);
 uint64_t gem_mappable_aperture_size(void);