The SCM driver still funnels every call through a process-wide
__scm singleton.
This series threads struct qcom_scm through the driver and the
exported API, then drops the global.
Series summary
--------------
Patch 1: Internal helpers take the instance. Callbacks that only
have a struct device or reset_controller_dev recover it
with drvdata / container_of. Exported signatures stay
unchanged so this patch is bisectable on its own.
Patch 2: Exported calls take struct qcom_scm * as the first
argument. The type stays opaque in qcom_scm.h.
Children of the SCM device (qseecom, tzmem, qcomtee)
use dev_get_drvdata() on the parent. Other consumers
call qcom_scm_get(), which finds the bound platform
device and returns NULL until probe has marked the
instance ready. Callers that need SCM return
-EPROBE_DEFER; callers that only use it for an optional
path (rmtfs VMIDs, fastrpc vmids, PAS region assign,
Venus CP, HDMI HDCP, Adreno fuse poke) skip the lookup
or tolerate NULL. qcom_pas_* is unchanged: PAS has a
TEE backend, so those ops keep struct device * and the
SCM backend uses drvdata.
Patch 3: Drop __scm. Readiness is scm->available with the same
release/acquire pairing as today. Module-parameter
stores reuse qcom_scm_get(); shutdown uses
platform_get_drvdata().
No intended change in SCM calling convention or wait-queue
behaviour.
Testing
-------
Booted to a shell on Qualcomm SA8775P Ride4 with current series.
qcom_scm bound as firmware:qcom_scm; probe logged SMC ARM 64 and
the tz-ffi reserved-memory assignment. Consumers were not exercised.
Suggested-by: Maxime Ripard <[email protected]>
Signed-off-by: Albert Esteve <[email protected]>
---
Albert Esteve (3):
firmware: qcom: scm: pass qcom_scm to internal helpers
firmware: qcom: scm: pass qcom_scm through the exported API
firmware: qcom: scm: drop the __scm global
arch/arm/mach-qcom/platsmp.c | 3 +-
drivers/cpuidle/cpuidle-qcom-spm.c | 28 +-
drivers/firmware/qcom/qcom_qseecom.c | 3 +-
drivers/firmware/qcom/qcom_scm-smc.c | 2 +-
drivers/firmware/qcom/qcom_scm.c | 518 +++++++++++++----------
drivers/firmware/qcom/qcom_scm.h | 2 +-
drivers/firmware/qcom/qcom_tzmem.c | 6 +-
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 6 +-
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 8 +-
drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c | 6 +-
drivers/iommu/arm/arm-smmu/arm-smmu-qcom-debug.c | 9 +-
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 8 +-
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h | 3 +
drivers/iommu/arm/arm-smmu/qcom_iommu.c | 18 +-
drivers/irqchip/qcom-pdc.c | 6 +-
drivers/media/platform/qcom/venus/firmware.c | 10 +-
drivers/misc/fastrpc.c | 31 +-
drivers/net/wireless/ath/ath10k/qmi.c | 12 +-
drivers/net/wireless/ath/ath10k/qmi.h | 3 +
drivers/nvmem/sec-qfprom.c | 6 +-
drivers/pinctrl/qcom/pinctrl-msm.c | 11 +-
drivers/remoteproc/qcom_q6v5_mss.c | 6 +-
drivers/remoteproc/qcom_q6v5_pas.c | 12 +-
drivers/soc/qcom/ice.c | 23 +-
drivers/soc/qcom/ocmem.c | 22 +-
drivers/soc/qcom/rmtfs_mem.c | 8 +-
drivers/tee/qcomtee/call.c | 7 +
drivers/tee/qcomtee/core.c | 6 +-
drivers/tee/qcomtee/qcomtee.h | 2 +
drivers/thermal/qcom/lmh.c | 22 +-
include/linux/firmware/qcom/qcom_qseecom.h | 5 +-
include/linux/firmware/qcom/qcom_scm.h | 117 ++---
32 files changed, 566 insertions(+), 363 deletions(-)
---
base-commit: bc35965f6940a9bf834d54187b6088b8eb09206d
change-id: 20260908-scm-device-api-634ac7a7f377
Best regards,
--
Albert Esteve <[email protected]>
