[PATCH 3/3] wifi: ath12k: rely on page_pool APIs for buffer allocation

[Baochen Qiang]

On 10/8/2026 9:16 PM, Lorenzo Bianconi wrote:
> Convert the Rx refill buffers to the page_pool API instead of allocating
> an skb with dev_alloc_skb() and mapping it with dma_map_single(). The pool
> handles the DMA mapping and buffer recycling.
> 
> Add a page_pool to struct dp_rxdma_ring, created in
> ath12k_dp_rxdma_ring_buf_setup() and destroyed in
> ath12k_dp_rxdma_ring_buf_cleanup().
> 
> Update ath12k_dp_unmap_rx_buf() to sync page_pool buffers for the CPU
> instead of unmapping them, and guard the teardown paths
> (ath12k_dp_cc_cleanup(), ath12k_dp_h_msdu_buffer_type()) against
> page_pool buffers. In the re-inject path, sync an already mapped
> page_pool buffer for the device instead of mapping it again, and fill the
> descriptor with the DMA address stored in the rxcb.
> 
> The monitor, CE and TX paths are left unchanged.
> 
> This is just preliminary support: the goal is to use a single page to map
> two separated fragments of 2048B.

why? please always justify your motivation in detail when the change is not trival.

Besides, instead of preliminary patches, why not just send the full support in a single
series?