diff options
Diffstat (limited to 'include/uapi/drm/panthor_drm.h')
| -rw-r--r-- | include/uapi/drm/panthor_drm.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/uapi/drm/panthor_drm.h b/include/uapi/drm/panthor_drm.h index ad9a70afea6c..e1f43deb7eca 100644 --- a/include/uapi/drm/panthor_drm.h +++ b/include/uapi/drm/panthor_drm.h @@ -130,6 +130,20 @@ enum drm_panthor_ioctl_id { /** @DRM_PANTHOR_BO_SET_LABEL: Label a BO. */ DRM_PANTHOR_BO_SET_LABEL, + + /** + * @DRM_PANTHOR_SET_USER_MMIO_OFFSET: Set the offset to use as the user MMIO offset. + * + * The default behavior is to pick the MMIO offset based on the size of the pgoff_t + * type seen by the process that manipulates the FD, such that a 32-bit process can + * always map the user MMIO ranges. But this approach doesn't work well for emulators + * like FEX, where the emulator is an 64-bit binary which might be executing 32-bit + * code. In that case, the kernel thinks it's the 64-bit process and assumes + * DRM_PANTHOR_USER_MMIO_OFFSET_64BIT is in use, but the UMD library expects + * DRM_PANTHOR_USER_MMIO_OFFSET_32BIT, because it can't mmap() anything above the + * pgoff_t size. + */ + DRM_PANTHOR_SET_USER_MMIO_OFFSET, }; /** @@ -296,6 +310,9 @@ struct drm_panthor_gpu_info { /** @as_present: Bitmask encoding the number of address-space exposed by the MMU. */ __u32 as_present; + /** @pad0: MBZ. */ + __u32 pad0; + /** @shader_present: Bitmask encoding the shader cores exposed by the GPU. */ __u64 shader_present; @@ -999,6 +1016,28 @@ struct drm_panthor_bo_set_label { }; /** + * struct drm_panthor_set_user_mmio_offset - Arguments passed to + * DRM_IOCTL_PANTHOR_SET_USER_MMIO_OFFSET + * + * This ioctl is only really useful if you want to support userspace + * CPU emulation environments where the size of an unsigned long differs + * between the host and the guest architectures. + */ +struct drm_panthor_set_user_mmio_offset { + /** + * @offset: User MMIO offset to use. + * + * Must be either DRM_PANTHOR_USER_MMIO_OFFSET_32BIT or + * DRM_PANTHOR_USER_MMIO_OFFSET_64BIT. + * + * Use DRM_PANTHOR_USER_MMIO_OFFSET (which selects OFFSET_32BIT or + * OFFSET_64BIT based on the size of an unsigned long) unless you + * have a very good reason to overrule this decision. + */ + __u64 offset; +}; + +/** * DRM_IOCTL_PANTHOR() - Build a Panthor IOCTL number * @__access: Access type. Must be R, W or RW. * @__id: One of the DRM_PANTHOR_xxx id. @@ -1042,6 +1081,8 @@ enum { DRM_IOCTL_PANTHOR(WR, TILER_HEAP_DESTROY, tiler_heap_destroy), DRM_IOCTL_PANTHOR_BO_SET_LABEL = DRM_IOCTL_PANTHOR(WR, BO_SET_LABEL, bo_set_label), + DRM_IOCTL_PANTHOR_SET_USER_MMIO_OFFSET = + DRM_IOCTL_PANTHOR(WR, SET_USER_MMIO_OFFSET, set_user_mmio_offset), }; #if defined(__cplusplus) |