From patchwork Mon Mar 13 21:55:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 13173371 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F35EC6FD19 for ; Mon, 13 Mar 2023 21:57:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229996AbjCMV5t (ORCPT ); Mon, 13 Mar 2023 17:57:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52978 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230176AbjCMV5l (ORCPT ); Mon, 13 Mar 2023 17:57:41 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7A82A9009A; Mon, 13 Mar 2023 14:57:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678744633; x=1710280633; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ZFpBMYKp7Vej9uaBP1GUTHm12MmkAD4Atk8fjSWwcN0=; b=G3oUjM/jERp3N2bTKOWoilQ2IctW14Ps+K4Mcv1YLoDbbTIJANpA6zXc RLvy2YcMFSHDzyoW8J3FF/fGK2wCh6Jy9K/DYYABPFfWM+GzZ2pZqX/B9 g+ffd26W2112hUHd8vSLt+Ney4AhPhgsEVlojSFfHH4TWyzHZCikyhTAU rIU3Gt4vAc3gfrSlSJ58xoCOwHSwdqvl3x1WPSgKKpTC3XdTbtF9avD4Z WcCMKaPjuKrmYj14P+gUzQxUsQ76gw+UT3Lk/zpJdyWHv6VFhg9cMeI7/ /k42A/NbWzlB1clUGuvNEJTNdEM01edRRPalrdR8OdlkGRlfhZ1McC6oP Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10648"; a="364928677" X-IronPort-AV: E=Sophos;i="5.98,258,1673942400"; d="scan'208";a="364928677" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Mar 2023 14:57:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10648"; a="747750987" X-IronPort-AV: E=Sophos;i="5.98,258,1673942400"; d="scan'208";a="747750987" Received: from newjersey.igk.intel.com ([10.102.20.203]) by fmsmga004.fm.intel.com with ESMTP; 13 Mar 2023 14:57:07 -0700 From: Alexander Lobakin To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau Cc: Alexander Lobakin , Maciej Fijalkowski , Larysa Zaremba , =?utf-8?q?Toke_H=C3=B8iland-J?= =?utf-8?q?=C3=B8rgensen?= , Song Liu , Jesper Dangaard Brouer , John Fastabend , Menglong Dong , Mykola Lysenko , "David S. Miller" , Jakub Kicinski , Eric Dumazet , Paolo Abeni , bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next v3 4/4] xdp: remove unused {__,}xdp_release_frame() Date: Mon, 13 Mar 2023 22:55:53 +0100 Message-Id: <20230313215553.1045175-5-aleksander.lobakin@intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230313215553.1045175-1-aleksander.lobakin@intel.com> References: <20230313215553.1045175-1-aleksander.lobakin@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net __xdp_build_skb_from_frame() was the last user of {__,}xdp_release_frame(), which detaches pages from the page_pool. All the consumers now recycle Page Pool skbs and page, except mlx5, stmmac and tsnep drivers, which use page_pool_release_page() directly (might change one day). It's safe to assume this functionality is not needed anymore and can be removed (in favor of recycling). Signed-off-by: Alexander Lobakin --- include/net/xdp.h | 29 ----------------------------- net/core/xdp.c | 15 --------------- 2 files changed, 44 deletions(-) diff --git a/include/net/xdp.h b/include/net/xdp.h index d517bfac937b..5393b3ebe56e 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -317,35 +317,6 @@ void xdp_flush_frame_bulk(struct xdp_frame_bulk *bq); void xdp_return_frame_bulk(struct xdp_frame *xdpf, struct xdp_frame_bulk *bq); -/* When sending xdp_frame into the network stack, then there is no - * return point callback, which is needed to release e.g. DMA-mapping - * resources with page_pool. Thus, have explicit function to release - * frame resources. - */ -void __xdp_release_frame(void *data, struct xdp_mem_info *mem); -static inline void xdp_release_frame(struct xdp_frame *xdpf) -{ - struct xdp_mem_info *mem = &xdpf->mem; - struct skb_shared_info *sinfo; - int i; - - /* Curr only page_pool needs this */ - if (mem->type != MEM_TYPE_PAGE_POOL) - return; - - if (likely(!xdp_frame_has_frags(xdpf))) - goto out; - - sinfo = xdp_get_shared_info_from_frame(xdpf); - for (i = 0; i < sinfo->nr_frags; i++) { - struct page *page = skb_frag_page(&sinfo->frags[i]); - - __xdp_release_frame(page_address(page), mem); - } -out: - __xdp_release_frame(xdpf->data, mem); -} - static __always_inline unsigned int xdp_get_frame_len(struct xdp_frame *xdpf) { struct skb_shared_info *sinfo; diff --git a/net/core/xdp.c b/net/core/xdp.c index a2237cfca8e9..8d3ad315f18d 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -531,21 +531,6 @@ void xdp_return_buff(struct xdp_buff *xdp) } EXPORT_SYMBOL_GPL(xdp_return_buff); -/* Only called for MEM_TYPE_PAGE_POOL see xdp.h */ -void __xdp_release_frame(void *data, struct xdp_mem_info *mem) -{ - struct xdp_mem_allocator *xa; - struct page *page; - - rcu_read_lock(); - xa = rhashtable_lookup(mem_id_ht, &mem->id, mem_id_rht_params); - page = virt_to_head_page(data); - if (xa) - page_pool_release_page(xa->page_pool, page); - rcu_read_unlock(); -} -EXPORT_SYMBOL_GPL(__xdp_release_frame); - void xdp_attachment_setup(struct xdp_attachment_info *info, struct netdev_bpf *bpf) {