linux-kernel - Re: [PATCH net-next] page_pool: split types and declarations from page

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Message-ID: <46ccfcdd-65cb-e182-9997-6e462c945ade@intel.com>
Date:   Wed, 19 Jul 2023 19:03:35 +0200
From:   Alexander Lobakin <aleksander.lobakin@...el.com>
To:     Yunsheng Lin <linyunsheng@...wei.com>
CC:     <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Wei Fang <wei.fang@....com>,
        Shenwei Wang <shenwei.wang@....com>,
        Clark Wang <xiaoning.wang@....com>,
        NXP Linux Team <linux-imx@....com>,
        Sunil Goutham <sgoutham@...vell.com>,
        Geetha sowjanya <gakula@...vell.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>,
        hariprasad <hkelam@...vell.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        "John Fastabend" <john.fastabend@...il.com>,
        Felix Fietkau <nbd@....name>,
        "Lorenzo Bianconi" <lorenzo@...nel.org>,
        Ryder Lee <ryder.lee@...iatek.com>,
        "Shayne Chen" <shayne.chen@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>,
        "Kalle Valo" <kvalo@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        "Ilias Apalodimas" <ilias.apalodimas@...aro.org>,
        <linux-rdma@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-wireless@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH net-next] page_pool: split types and declarations from
 page_pool.h

From: Yunsheng Lin <linyunsheng@...wei.com>
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