[PATCH net-next v4 0/4] net: stmmac: preserve and restore the installed EST schedule

[James Hilliard]

Continue Lorenzo Bianconi's EST replay series with v4 of the unmerged work:
https://lore.kernel.org/r/20260902-stmmac-est-reapply-after-open-v3-0-e72a6df5a7ef@oss.qualcomm.com

The PTP initialization fix from that series is already in the base.
Carry the remaining embedded-state and explicit-enable preparations,
and restore the installed schedule after open and resume reset.

Build TAPRIO replacements separately so rejected updates cannot
corrupt the installed schedule. Rebase the previous schedule against
the current PHC when rolling back a failed hardware update, and keep
DMA stopped until replay succeeds. These changes do not depend on
the later datapath recovery series.

Changes in v4:
- Omit the merged PTP initialization patch and adapt the remaining
  changes to probe-time PTP locking and current TAPRIO error handling.
- Separate schedule validation/rollback from open and resume replay.
- Reuse the base-time helper for replacement, PHC adjustment and
  rollback; propagate errors while preserving the installed cache.
- Start DMA only after the installed schedule has been restored.
- Link to v3: https://lore.kernel.org/r/20260902-stmmac-est-reapply-after-open-v3-0-e72a6df5a7ef@oss.qualcomm.com

Changes in v3:
- Guard priv->est.enable update using est_lock mutex.
- Embed stmmac_est in stmmac_priv struct.
- Rework locking in tc_taprio_configure().
- Fix possible divided by zero crash in tc_taprio_configure().
- Add missing reconfiguration during stmmac_resume().
- Honor ptp error code in __stmmac_open() and stmmac_resume().
- Link to v2: https://lore.kernel.org/r/20260829-stmmac-est-reapply-after-open-v2-1-5e5ccb185e92@oss.qualcomm.com

Changes in v2:
- Rename stmmac_est_reconfigure() in stmmac_setup_est().
- Rely on stmmac_setup_est() in tc_taprio_configure().
- Link to v1: https://lore.kernel.org/r/20260825-stmmac-est-reapply-after-open-v1-1-dfa80735e0a1@oss.qualcomm.com

Assisted-by: Codex:gpt-6-astra
Signed-off-by: James Hilliard <james.hilliard1 at gmail.com>

---
James Hilliard (1):
      net: stmmac: preserve the installed EST schedule on errors

Lorenzo Bianconi (3):
      net: stmmac: embed struct stmmac_est in stmmac_priv struct
      net: stmmac: pass the desired EST enable state to est_configure()
      net: stmmac: restore EST before starting DMA on open and resume

 drivers/net/ethernet/stmicro/stmmac/hwif.h        |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac.h      |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_est.c  |  47 ++++++-
 drivers/net/ethernet/stmicro/stmmac/stmmac_est.h  |  13 ++
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |  38 ++++--
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c  |  59 ++++-----
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c   | 142 +++++++++++-----------
 7 files changed, 176 insertions(+), 127 deletions(-)
---
base-commit: 1631d79ae57dce2c5f88ad278307028638a8b4d9
change-id: 20260824-stmmac-est-reapply-after-open-181d70a15eb6

Best regards,
--  
James Hilliard <james.hilliard1 at gmail.com>