Subject: Re: [PATCH net-next] page_pool: split types and declarations from page_pool.h

From: Alexander Lobakin <[email-masked]>
Date: Wed, 19 Jul 2023 19:03:35 +0200

From: Yunsheng Lin <[email-masked]>
Date: Wed, 19 Jul 2023 20:13:37 +0800

> Split types and pure function declarations from page_pool.h
> and add them in page_page_types.h, so that C sources can
> include page_pool.h and headers should generally only include
> page_pool_types.h as suggested by jakub.

[...]

> diff --git a/include/net/page_pool_types.h b/include/net/page_pool_types.h
> new file mode 100644
> index 000000000000..9dc189082e20
> --- /dev/null
> +++ b/include/net/page_pool_types.h
> @@ -0,0 +1,193 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +
> +#ifndef _NET_PAGE_POOL_TYPES_H
> +#define _NET_PAGE_POOL_TYPES_H
> +
> +#include <linux/ptr_ring.h>
> +#include <linux/dma-direction.h>

Nit: alphabetic sorting?

> +
> +#define PP_FLAG_DMA_MAP		BIT(0) /* Should page_pool do the DMA
> +					* map/unmap
> +					*/
> +#define PP_FLAG_DMA_SYNC_DEV	BIT(1) /* If set all pages that the driver gets
> +					* from page_pool will be
> +					* DMA-synced-for-device according to
> +					* the length provided by the device
> +					* driver.
> +					* Please note DMA-sync-for-CPU is still
> +					* device driver responsibility
> +					*/
[...]

Thanks,
Olek