intel: Store the aperture size in devinfo.

We will later use the devinfo from iris_bufmgr, where we don't have
access to the screen pointer. And since we are moving it, we can reuse
it in Anv and i965.

v2: return error code and check for it on Anv (Lionel).
v3: Remove anv_gem_get_aperture() from anv_private.h and stubs (Lionel).

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5043>

src/intel/dev/gen_device_info.c

@@ -1396,6 +1396,18 @@ query_topology(struct gen_device_info *devinfo, int fd)
 
 }
 
+int
+gen_get_aperture_size(int fd, uint64_t *size)
+{
+   struct drm_i915_gem_get_aperture aperture = { 0 };
+
+   int ret = gen_ioctl(fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
+   if (ret == 0 && size)
+      *size = aperture.aper_size;
+
+   return ret;
+}
+
 bool
 gen_get_device_info_from_fd(int fd, struct gen_device_info *devinfo)
 {
@@ -1463,5 +1475,7 @@ gen_get_device_info_from_fd(int fd, struct gen_device_info *devinfo)
       getparam_topology(devinfo, fd);
    }
 
+   gen_get_aperture_size(fd, &devinfo->aperture_bytes);
+
    return true;
 }

src/intel/dev/gen_device_info.h

@@ -252,6 +252,8 @@ struct gen_device_info
     */
    uint64_t timestamp_frequency;
 
+   uint64_t aperture_bytes;
+
    /**
     * ID to put into the .aub files.
     */
@@ -293,6 +295,7 @@ gen_device_info_timebase_scale(const struct gen_device_info *devinfo,
 bool gen_get_device_info_from_fd(int fh, struct gen_device_info *devinfo);
 bool gen_get_device_info_from_pci_id(int pci_id,
                                      struct gen_device_info *devinfo);
+int gen_get_aperture_size(int fd, uint64_t *size);
 
 #ifdef __cplusplus
 }