Re: [PATCH ath-next] wifi: ath12k: update IPQ5332 BDF address offset

On 7/10/2026 1:35 PM, Aaradhana Sahu wrote:
> In the ath12k driver, the BDF_MEM_REGION_TYPE address is derived by
> adding a fixed bdf_addr_offset to the WCSS Q6 region base address.
> 
> The current offset (0xC00000) works only when the Q6 region contains
> the IPQ5332 ucode alone. On some IPQ5332 platform variants, additional
> devices share the same WCSS Q6 processor and place their firmware
> ucode in the same Q6 region. This results in multiple ucode sections
> within the region, and the existing offset can cause the BDF memory
> region to overlap with firmware read-only sections, which can lead to
> firmware crash and driver boot failure.
> 
> Increase the bdf_addr_offset to 0x1A00000, determined by analyzing
> firmware memory maps across all known IPQ5332 platform variants. This
> value represents the upper bound of the largest combined firmware and
> ensures all IPQ5332 variants can allocate the BDF region safely without
> overlapping firmware regions.
> 
> Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.6-01275-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Aaradhana Sahu <[email protected]>

Reviewed-by: Baochen Qiang <[email protected]>