From patchwork Wed Mar 24 21:34:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesper Dangaard Brouer X-Patchwork-Id: 12162455 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97C8FC433DB for ; Wed, 24 Mar 2021 21:35:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 093E9619EC for ; Wed, 24 Mar 2021 21:35:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 093E9619EC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 98E716B0322; Wed, 24 Mar 2021 17:35:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 965EE6B0323; Wed, 24 Mar 2021 17:35:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7E03C6B0324; Wed, 24 Mar 2021 17:35:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0065.hostedemail.com [216.40.44.65]) by kanga.kvack.org (Postfix) with ESMTP id 651D66B0322 for ; Wed, 24 Mar 2021 17:35:00 -0400 (EDT) Received: from smtpin33.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 289FB82499B9 for ; Wed, 24 Mar 2021 21:35:00 +0000 (UTC) X-FDA: 77956073160.33.2238296 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by imf13.hostedemail.com (Postfix) with ESMTP id 333E7E0011E1 for ; Wed, 24 Mar 2021 21:34:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1616621699; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UfGrVeHEI0sce0qvVh5BuQBoPgz+S960/h6BqEQEhUA=; b=Q7b15qK0LnNPKLBeL7v101Rvz9niVB92QqjCy/1BxLtrcLm0YlgT+Op8dbh6NLyTYm+av6 mfG3yRjwkPziGGAbx/gKY1ZP7r7qkjtqcJ3jTlDFIJgqn/Y5xHUx3mA8QwUTj1j6Lz9fxt mjZCX0DsJD7jr0l5uMG1tvtXZ1QvhkE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-339-SdPLb4OhPCStBnI5K1dcdA-1; Wed, 24 Mar 2021 17:34:55 -0400 X-MC-Unique: SdPLb4OhPCStBnI5K1dcdA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4FC30185302D; Wed, 24 Mar 2021 21:34:53 +0000 (UTC) Received: from firesoul.localdomain (unknown [10.40.208.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id 452EB6A8F1; Wed, 24 Mar 2021 21:34:50 +0000 (UTC) Received: from [10.1.1.1] (localhost [IPv6:::1]) by firesoul.localdomain (Postfix) with ESMTP id 2CC8E300A2A79; Wed, 24 Mar 2021 22:34:49 +0100 (CET) Subject: [PATCH mel-git 1/3] net: page_pool: refactor dma_map into own function page_pool_dma_map From: Jesper Dangaard Brouer To: Mel Gorman , linux-mm@kvack.org Cc: Jesper Dangaard Brouer , chuck.lever@oracle.com, Alexander Duyck , netdev@vger.kernel.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 24 Mar 2021 22:34:49 +0100 Message-ID: <161662168912.940814.14561278459325120343.stgit@firesoul> In-Reply-To: <161662166301.940814.9765023867613542235.stgit@firesoul> References: <161662166301.940814.9765023867613542235.stgit@firesoul> User-Agent: StGit/0.19 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Stat-Signature: pk93d7ijgj16krtpf7fgs4tqir9rdntd X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 333E7E0011E1 Received-SPF: none (redhat.com>: No applicable sender policy available) receiver=imf13; identity=mailfrom; envelope-from=""; helo=us-smtp-delivery-124.mimecast.com; client-ip=216.205.24.124 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1616621699-623936 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In preparation for next patch, move the dma mapping into its own function, as this will make it easier to follow the changes. V2: make page_pool_dma_map return boolean (Ilias) Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Mel Gorman Reviewed-by: Ilias Apalodimas --- net/core/page_pool.c | 45 ++++++++++++++++++++++++++------------------- 1 file changed, 26 insertions(+), 19 deletions(-) diff --git a/net/core/page_pool.c b/net/core/page_pool.c index ad8b0707af04..40e1b2beaa6c 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -180,14 +180,37 @@ static void page_pool_dma_sync_for_device(struct page_pool *pool, pool->p.dma_dir); } +static bool page_pool_dma_map(struct page_pool *pool, struct page *page) +{ + dma_addr_t dma; + + /* Setup DMA mapping: use 'struct page' area for storing DMA-addr + * since dma_addr_t can be either 32 or 64 bits and does not always fit + * into page private data (i.e 32bit cpu with 64bit DMA caps) + * This mapping is kept for lifetime of page, until leaving pool. + */ + dma = dma_map_page_attrs(pool->p.dev, page, 0, + (PAGE_SIZE << pool->p.order), + pool->p.dma_dir, DMA_ATTR_SKIP_CPU_SYNC); + if (dma_mapping_error(pool->p.dev, dma)) + return false; + + page->dma_addr = dma; + + if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV) + page_pool_dma_sync_for_device(pool, page, pool->p.max_len); + + return true; +} + /* slow path */ noinline static struct page *__page_pool_alloc_pages_slow(struct page_pool *pool, gfp_t _gfp) { + unsigned int pp_flags = pool->p.flags; struct page *page; gfp_t gfp = _gfp; - dma_addr_t dma; /* We could always set __GFP_COMP, and avoid this branch, as * prep_new_page() can handle order-0 with __GFP_COMP. @@ -211,30 +234,14 @@ static struct page *__page_pool_alloc_pages_slow(struct page_pool *pool, if (!page) return NULL; - if (!(pool->p.flags & PP_FLAG_DMA_MAP)) - goto skip_dma_map; - - /* Setup DMA mapping: use 'struct page' area for storing DMA-addr - * since dma_addr_t can be either 32 or 64 bits and does not always fit - * into page private data (i.e 32bit cpu with 64bit DMA caps) - * This mapping is kept for lifetime of page, until leaving pool. - */ - dma = dma_map_page_attrs(pool->p.dev, page, 0, - (PAGE_SIZE << pool->p.order), - pool->p.dma_dir, DMA_ATTR_SKIP_CPU_SYNC); - if (dma_mapping_error(pool->p.dev, dma)) { + if ((pp_flags & PP_FLAG_DMA_MAP) && + unlikely(!page_pool_dma_map(pool, page))) { put_page(page); return NULL; } - page->dma_addr = dma; - if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV) - page_pool_dma_sync_for_device(pool, page, pool->p.max_len); - -skip_dma_map: /* Track how many pages are held 'in-flight' */ pool->pages_state_hold_cnt++; - trace_page_pool_state_hold(pool, page, pool->pages_state_hold_cnt); /* When page just alloc'ed is should/must have refcnt 1. */