[PATCH v3 0/4] stratix10: Add Interrupt support for asynchronous communication with SDM

[tze.yee.ng@altera.com]

From: Tze Yee Ng <tze.yee.ng@altera.com>

This patch-set adds support for interrupt from Secure Device Manager (SDM)
to Stratix10 SoC for asynchronous communication.

Following things are added in this patch-set:
- Add support for interrupt from SDM to Stratix10 SoC.
- Add documentation for SDM interrupt in Stratix10 SoC.
- Enable SDM interrupt in Stratix10 SoC.
- Enable SDM interrupt in Agilex SoC.

I am taking over this series from Mahesh Rao and posting v3 on his behalf.
Reference: 
https://lore.kernel.org/r/20250812-sip_svc_irq-v2-0-53098e11705a@altera.com

Changes in v3:
- Reflow commit message body to ~75 columns (fix Dinh's comment in v2
  review)
- Add a newline before stratix10_async_workqueue_handler
  description (fix Dinh's comment in v2 review)
- Treat of_irq_get() failure as irq <= 0, since 0 is also a
  failing value (fix Dinh's comment in v2 review)
- Fix IRQ disable race: only call disable_irq_nosync() when
  queue_work() newly queues work, and disable the fired irq
  argument rather than actrl->irq
- Do not invoke client callbacks under trx_list_lock; copy
  cb/cb_arg under the lock and call the callback after unlock
- Use disable_irq() + flush_work() + devm_free_irq() on
  teardown, and treat unset IRQ as 0
- Demote successful IRQ registration log from dev_alert() to
  dev_info(), and demote async poll failure log from
  dev_err() to dev_dbg()
- Clarify INTEL_SIP_SMC_ASYNC_POLL_ON_IRQ kdoc to match
  a1-a4 bitmap usage
- Drop Reviewed-by: Matthew Gerlach from all patches
  (no longer at Altera)
- Link to RESEND v2: 
  https://lore.kernel.org/r/20250812-sip_svc_irq-v2-0-53098e11705a@altera.com

Changes in v2:
- Separated from the larger SIP SVC upstream series into a
  dedicated interrupt-support series as requested
- Link to v1: 
  https://lore.kernel.org/r/20250722-sip_svc_irq-v1-0-c5b9e02c1ce6@altera.com

Mahesh Rao (4):
  dt-bindings: firmware: Add interrupt specification for Intel Stratix
    10 Service Layer.
  dts: stratix10: Add support for SDM mailbox interrupt for Intel
    Stratix10 SoC FPGA.
  dts: agilex: Add support for SDM mailbox interrupt for Intel Agilex
    SoC FPGA.
  firmware: stratix10-svc: Add for SDM mailbox doorbell interrupt

 .../firmware/intel,stratix10-svc.yaml         |  10 ++
 .../boot/dts/altera/socfpga_stratix10.dtsi    |   4 +
 arch/arm64/boot/dts/intel/socfpga_agilex.dtsi |   2 +
 drivers/firmware/stratix10-svc.c              | 135 ++++++++++++++++--
 include/linux/firmware/intel/stratix10-smc.h  |  21 +++
 5 files changed, 161 insertions(+), 11 deletions(-)

-- 
2.43.7