On Thu, Apr 07, 2022 at 09:18:39AM -0700, Matt Roper wrote:
The intent of the version check in the mmap ioctl was to maintain support for existing platforms (i.e., ADL/RPL and earlier), but drop support on all future igpu platforms. As we've seen on the dgpu side, the hardware teams are using a more fine-grained numbering system for IP version numbers these days, so it's possible the version number associated with our next igpu could be some form of "12.xx" rather than 13 or higher. Comparing against the full ver.release number will ensure the intent of the check is maintained no matter what numbering the hardware teams settle on.
Fixes: d3f3baa3562a ("drm/i915: Reinstate the mmap ioctl for some platforms") Cc: Thomas Hellström thomas.hellstrom@linux.intel.com Cc: Lucas De Marchi lucas.demarchi@intel.com Signed-off-by: Matt Roper matthew.d.roper@intel.com
Reviewed-by: Lucas De Marchi lucas.demarchi@intel.com
thanks Lucas De Marchi
drivers/gpu/drm/i915/gem/i915_gem_mman.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index c3ea243d414d..0c5c43852e24 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -70,7 +70,7 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data, * mmap ioctl is disallowed for all discrete platforms, * and for all platforms with GRAPHICS_VER > 12. */
- if (IS_DGFX(i915) || GRAPHICS_VER(i915) > 12)
if (IS_DGFX(i915) || GRAPHICS_VER_FULL(i915) > IP_VER(12, 0)) return -EOPNOTSUPP;
if (args->flags & ~(I915_MMAP_WC))
-- 2.34.1