Re: [net-next v1 07/16] netdev: netdevice devmem allocator

[David Ahern]

On 12/7/23 5:52 PM, Mina Almasry wrote:
> diff --git a/net/core/dev.c b/net/core/dev.c
> index b8c8be5a912e..30667e4c3b95 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -2120,6 +2120,41 @@ static int netdev_restart_rx_queue(struct net_device *dev, int rxq_idx)
>  	return err;
>  }
>  
> +struct page_pool_iov *netdev_alloc_dmabuf(struct netdev_dmabuf_binding *binding)
> +{
> +	struct dmabuf_genpool_chunk_owner *owner;
> +	struct page_pool_iov *ppiov;
> +	unsigned long dma_addr;
> +	ssize_t offset;
> +	ssize_t index;
> +
> +	dma_addr = gen_pool_alloc_owner(binding->chunk_pool, PAGE_SIZE,

Any reason not to allow allocation sizes other than PAGE_SIZE? e.g.,
2048 for smaller MTUs or 8192 for larger ones. It can be a property of
page_pool and constant across allocations vs allowing different size for
each allocation.