Add page reclamation action to tlb inval backend. The page reclamation
action is paired with range tlb invalidations so both are issued at the
same time.
Page reclamation will issue the TLB invalidation with an invalid seqno
and a H2G page reclamation action with the fence's corresponding seqno
and handle the fence accordingly on page reclaim action done handler.
If page reclamation fails, tlb timeout handler will be responsible for
signalling fence and cleaning up.
v2:
- add send_page_reclaim to patch.
- Remove flush_cache and use prl_sa pointer to determine PPC flush
instead of explicit bool. Add NULL as fallback for others. (Matthew B)
v3:
- Add comments for flush_cache with media.
Signed-off-by: Brian Nguyen <brian3.nguyen@intel.com>
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251212213225.3564537-20-brian3.nguyen@intel.com
Allow tlb_invalidation to control when driver wants to flush the
Private Physical Cache (PPC) as a process of the tlb invalidation
process.
Default behavior is still to always flush the PPC but driver now has the
option to disable it.
v2:
- Revise commit/kernel doc descriptions. (Shuicheng)
- Remove unused function. (Shuicheng)
- Remove bool flush_cache parameter from fence,
and various function inputs. (Matthew B)
Signed-off-by: Brian Nguyen <brian3.nguyen@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Cc: Shuicheng Lin <shuicheng.lin@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251212213225.3564537-14-brian3.nguyen@intel.com
The frontend exposes an API to the driver to send invalidations, handles
sequence number assignment, synchronization (fences), and provides a
timeout mechanism. The backend issues the actual invalidation to the
hardware (or firmware).
The new layering easily allows issuing TLB invalidations to different
hardware or firmware interfaces.
Normalize some naming while here too.
Signed-off-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250826182911.392550-10-stuart.summers@intel.com
