Re: [PATCH ath-next v3] wifi: ath12k: add QMI capability negotiation for dynamic memory mode

[Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>]

On 6/26/2026 2:13 PM, Aaradhana Sahu wrote:
> On AHB platforms, firmware operates in two modes: fixed-memory mode where
> firmware uses hardcoded addresses for memory regions such as BDF and does
> not request HOST_DDR memory from the host, and dynamic-memory mode where
> firmware expects the host to provide memory addresses including HOST_DDR
> after the Q6 read-only region and relies on host allocation for all memory
> types.
> 
> Introduce QMI capability negotiation to support both modes. Add a new QMI
> PHY capability flag dynamic_ddr_support which is advertised by firmware to
> indicate it supports dynamic memory mode. When the host detects this
> capability, set the dynamic_mem_support flag in the host capability message
> to signal the host is ready to provide dynamic memory allocation. This
> triggers firmware to send the HOST_DDR memory request and use the
> host-provided address.
> 
> For backward compatibility, if firmware doesn't advertise
> dynamic_ddr_support, the firmware continues to operate in fixed-memory mode
> where firmware uses predefined addresses.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6-01243-QCAHKSWPL_SILICONZ-1
> Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.6-01275-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Aaradhana Sahu <aaradhana.sahu@oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>