[PATCH v9 0/5] soc: qcom: add in-kernel pd-mapper implementation

[Dmitry Baryshkov]

Protection domain mapper is a QMI service providing mapping between
'protection domains' and services supported / allowed in these domains.
For example such mapping is required for loading of the WiFi firmware or
for properly starting up the UCSI / altmode / battery manager support.

The existing userspace implementation has several issue. It doesn't play
well with CONFIG_EXTRA_FIRMWARE, it doesn't reread the JSON files if the
firmware location is changed (or if the firmware was not available at
the time pd-mapper was started but the corresponding directory is
mounted later), etc.

However this configuration is largely static and common between
different platforms. Provide in-kernel service implementing static
per-platform data.

---
Changes in v9:
- Adjust locking in pdr_get_domain_list(), releasing the mutex right
  after qmi_send_request() (Chris Lew)
- Link to v8: https://lore.kernel.org/r/20240512-qcom-pd-mapper-v8-0-5ecbb276fcc0@xxxxxxxxxx

Changes in v8:
- Reworked pd-mapper to register as an rproc_subdev / auxdev
- Dropped Tested-by from Steev and Alexey from the last patch since the
  implementation was changed significantly.
- Add sensors, cdsp and mpss_root domains to 660 config (Alexey
  Minnekhanov)
- Added platform entry for sm4250 (used for qrb4210 / RB2)
- Added locking to the pdr_get_domain_list() (Chris Lew)
- Remove the call to qmi_del_server() and corresponding API (Chris Lew)
- In qmi_handle_init() changed 1024 to a defined constant (Chris Lew)
- Link to v7: https://lore.kernel.org/r/20240424-qcom-pd-mapper-v7-0-05f7fc646e0f@xxxxxxxxxx

Changes in v7:
- Fixed modular build (Steev)
- Link to v6: https://lore.kernel.org/r/20240422-qcom-pd-mapper-v6-0-f96957d01207@xxxxxxxxxx

Changes in v6:
- Reworked mutex to fix lockdep issue on deregistration
- Fixed dependencies between PD-mapper and remoteproc to fix modular
  builds (Krzysztof)
- Added EXPORT_SYMBOL_GPL to fix modular builds (Krzysztof)
- Fixed kerneldocs (Krzysztof)
- Removed extra pr_debug messages (Krzysztof)
- Fixed wcss build (Krzysztof)
- Added platforms which do not require protection domain mapping to
  silence the notice on those platforms
- Link to v5: https://lore.kernel.org/r/20240419-qcom-pd-mapper-v5-0-e35b6f847e99@xxxxxxxxxx

Changes in v5:
- pdr: drop lock in pdr_register_listener, list_lock is already held (Chris Lew)
- pd_mapper: reworked to provide static configuration per platform
  (Bjorn)
- Link to v4: https://lore.kernel.org/r/20240311-qcom-pd-mapper-v4-0-24679cca5c24@xxxxxxxxxx

Changes in v4:
- Fixed missing chunk, reenabled kfree in qmi_del_server (Konrad)
- Added configuration for sm6350 (Thanks to Luca)
- Removed RFC tag (Konrad)
- Link to v3: https://lore.kernel.org/r/20240304-qcom-pd-mapper-v3-0-6858fa1ac1c8@xxxxxxxxxx

Changes in RFC v3:
- Send start / stop notifications when PD-mapper domain list is changed
- Reworked the way PD-mapper treats protection domains, register all of
  them in a single batch
- Added SC7180 domains configuration based on TCL Book 14 GO
- Link to v2: https://lore.kernel.org/r/20240301-qcom-pd-mapper-v2-0-5d12a081d9d1@xxxxxxxxxx

Changes in RFC v2:
- Swapped num_domains / domains (Konrad)
- Fixed an issue with battery not working on sc8280xp
- Added missing configuration for QCS404

To: Bjorn Andersson <andersson@xxxxxxxxxx>
To: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
To: Sibi Sankar <quic_sibis@xxxxxxxxxxx>
To: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Cc: linux-arm-msm@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-remoteproc@xxxxxxxxxxxxxxx

---
Dmitry Baryshkov (5):
      soc: qcom: pdr: protect locator_addr with the main mutex
      soc: qcom: pdr: fix parsing of domains lists
      soc: qcom: pdr: extract PDR message marshalling data
      soc: qcom: add pd-mapper implementation
      remoteproc: qcom: enable in-kernel PD mapper

 drivers/remoteproc/qcom_common.c    |  87 +++++
 drivers/remoteproc/qcom_common.h    |  10 +
 drivers/remoteproc/qcom_q6v5_adsp.c |   3 +
 drivers/remoteproc/qcom_q6v5_mss.c  |   3 +
 drivers/remoteproc/qcom_q6v5_pas.c  |   3 +
 drivers/remoteproc/qcom_q6v5_wcss.c |   3 +
 drivers/soc/qcom/Kconfig            |  15 +
 drivers/soc/qcom/Makefile           |   2 +
 drivers/soc/qcom/pdr_interface.c    |   8 +-
 drivers/soc/qcom/pdr_internal.h     | 318 ++---------------
 drivers/soc/qcom/qcom_pd_mapper.c   | 676 ++++++++++++++++++++++++++++++++++++
 drivers/soc/qcom/qcom_pdr_msg.c     | 353 +++++++++++++++++++
 12 files changed, 1183 insertions(+), 298 deletions(-)
---
base-commit: 2102cb0d050d34d50b9642a3a50861787527e922
change-id: 20240301-qcom-pd-mapper-e12d622d4ad0

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>