[PATCH ath-next] wifi: ath12k: add support to load shared firmware on multiPD

[Baochen Qiang]

On 8/11/2026 1:43 PM, Aaradhana Sahu wrote:
> IPQ5332 platform uses a MultiPD architecture where multiple firmware
> instances share common read-only code segments. The driver currently
> loads only the per-UserPD firmware, which leaves the shared read-only
> firmware unloaded.
> 
> Add support for loading the shared read-only firmware once before the
> UserPDs are powered up. The shared segment contains common code that is
> identical across all UserPDs and reduces the total firmware memory
> requirement.
> 
> Store the reserved memory mapping in struct ath12k_ahb_rproc_info so it can
> be shared by all UserPDs and mapped only once. Keep the mapping valid
> across UserPD power cycles, and unmap it when the last UserPD is removed.
> 
> Shut down the shared firmware from the rproc deconfiguration path when the
> last UserPD is removed.
> 
> Also, pass NULL for the reloc_base parameter because the driver uses fixed
> memory regions configured through device tree and does not need the
> adjusted physical address after relocation.
> 
> Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.6-01275-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Aaradhana Sahu <aaradhana.sahu at oss.qualcomm.com>
Reviewed-by: Baochen Qiang <baochen.qiang at oss.qualcomm.com>