Re: [PATCH 0/7] panfrost,panthor: Cached maps and explicit flushing

[Boris Brezillon <boris.brezillon@collabora.com>]

+panthor/panfrost maintainers/devs

On Fri, 22 Aug 2025 10:29:09 -0400
Faith Ekstrand <faith@gfxstrand.net> wrote:

> This series implements cached maps and explicit flushing for both panfrost
> and panthor.  To avoid code/bug duplication, the tricky guts of the cache
> flusing ioctl which walk the sg list are broken into a new common shmem
> helper which can be used by any driver.
> 
> The PanVK MR to use this lives here:
> 
> https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36385
> 
> Faith Ekstrand (6):
>   drm/shmem: Add a drm_gem_shmem_sync_mmap() helper
>   drm/panthor: Add a PANTHOR_BO_SYNC ioctl
>   drm/panthor: Bump the driver version to 1.6
>   drm/panfrost: Add flag to map GEM object Write-Back Cacheable
>   drm/panfrost: Add a PANFROST_SYNC_BO ioctl
>   drm/panfrost: Bump the driver version to 1.5
> 
> Loïc Molinari (1):
>   drm/panthor: Add flag to map GEM object Write-Back Cacheable
> 
>  drivers/gpu/drm/drm_gem_shmem_helper.c  | 64 +++++++++++++++++++++++
>  drivers/gpu/drm/panfrost/panfrost_drv.c | 67 +++++++++++++++++++++++--
>  drivers/gpu/drm/panfrost/panfrost_gem.c | 23 +++++++++
>  drivers/gpu/drm/panfrost/panfrost_gem.h |  2 +
>  drivers/gpu/drm/panthor/panthor_drv.c   | 58 +++++++++++++++++++--
>  drivers/gpu/drm/panthor/panthor_gem.c   | 23 +++++++++
>  drivers/gpu/drm/panthor/panthor_gem.h   |  3 ++
>  include/drm/drm_gem_shmem_helper.h      |  3 ++
>  include/uapi/drm/panfrost_drm.h         | 46 +++++++++++++++++
>  include/uapi/drm/panthor_drm.h          | 65 ++++++++++++++++++++++++
>  10 files changed, 348 insertions(+), 6 deletions(-)
>