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wifi: ath12k: use per-device max QMI chunk size

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When a target memory chunk fails to allocate, ath12k_qmi_alloc_chunk()
compares the requested chunk size against ATH12K_QMI_MAX_CHUNK_SIZE to
decide whether to ask the firmware to retry with smaller chunks
(-EAGAIN) or to give up (-ENOMEM). This threshold is the boundary that
tells a first (big) request apart from a retry (small) request, so it
has to match the size the firmware actually falls back to on retry.

That fallback size is not the same across all firmware, though. On
WCN7850 and QCC2072 the firmware splits the request into 512 KB chunks
on retry, whereas on QCN9274, IPQ5332 and IPQ5424 the firmware retries
with larger 2 MB segments instead of 512 KB. A single hardcoded 2 MB
threshold is therefore wrong for the former, and a hardcoded 512 KB
threshold would be wrong for the latter.

Replace the hardcoded ATH12K_QMI_MAX_CHUNK_SIZE with a per-device
qmi_max_chunk_size parameter: SZ_512K for WCN7850 and QCC2072, SZ_2M for
QCN9274, IPQ5332 and IPQ5424. No functional change for the latter (the
value stays 2 MB); the former now use the correct 512 KB boundary.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3
Tested-on: QCC2072 hw1.0 PCI WLAN.COL.1.0.c2-00074-QCACOLSWPL_V1_TO_SILICONZ-1

Signed-off-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>
Link: https://patch.msgid.link/20260730-ath12k-align-qmi-memory-v1-1-0fef98dda614@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
This commit is contained in:
Baochen Qiang 2026-07-30 14:17:40 +08:00 • committed by Jeff Johnson
commit 4e286c780d
3 changed files with 9 additions and 2 deletions
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