+
+static size_t
+drm_intel_probe_agp_aperture_size(int fd)
+{
+ struct pci_device *pci_dev;
+ size_t size = 0;
+ int ret;
+
+ ret = pci_system_init();
+ if (ret)
+ goto err;
+
+ /* XXX handle multiple adaptors? */
+ pci_dev = pci_device_find_by_slot(0, 0, 2, 0);
+ if (pci_dev == NULL)
+ goto err;
+
+ ret = pci_device_probe(pci_dev);
+ if (ret)
+ goto err;
+
+ size = pci_dev->regions[2].size;
+err:
+ pci_system_cleanup ();
+ return size;
+}
+
+drm_public int
+drm_intel_get_aperture_sizes(int fd, size_t *mappable, size_t *total)
+{
+
+ struct drm_i915_gem_get_aperture aperture;
+ int ret;
+
+ ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
+ if (ret)
+ return ret;
+
+ *mappable = 0;
+ /* XXX add a query for the kernel value? */
+ if (*mappable == 0)
+ *mappable = drm_intel_probe_agp_aperture_size(fd);
+ if (*mappable == 0)
+ *mappable = 64 * 1024 * 1024; /* minimum possible value */
+ *total = aperture.aper_size;
+ return 0;
+}