From mboxrd@z Thu Jan 1 00:00:00 1970 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=-4.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 07D70C432C3 for ; Wed, 20 Nov 2019 14:54:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CEABB20731 for ; Wed, 20 Nov 2019 14:54:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574261678; bh=Thadl04novci7ML+I1PIxRzBhkBH9ByjE09NDkCvwxE=; h=From:To:Cc:Subject:Date:List-ID:From; b=JO/GEI5Z9e3ZrBKz9pmmh4EJKjK0ja196OIZIWo8bdYEvX5P3vnds0PFGbx7pCk9n J40aPmcI1c4lCSNtrxEbJ+sIRsvRmCBsYRzXiO///vdrcpEuTEl6GVq7MD2egAWpLX cPhOdBKsc3yQulymR5/PZLMnL3hpXCBEARcKu8qY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731665AbfKTOyh (ORCPT ); Wed, 20 Nov 2019 09:54:37 -0500 Received: from mail.kernel.org ([198.145.29.99]:48572 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729157AbfKTOyh (ORCPT ); Wed, 20 Nov 2019 09:54:37 -0500 Received: from localhost.localdomain.com (unknown [77.139.212.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C202A206EC; Wed, 20 Nov 2019 14:54:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574261676; bh=Thadl04novci7ML+I1PIxRzBhkBH9ByjE09NDkCvwxE=; h=From:To:Cc:Subject:Date:From; b=11LjERi4WUHPENZT9ve97XjIBQpGvzNl9o9FDYnn2yMpFZVzuBY/2c6lUW7mtOPdl 9paWMXiBJWZMTg0Qx7GfgTtXytoy+9GbqxlRhzQ5tHx3fFlYzygHXJRZkivYMU91En a9yS3T9fFCwvvZfebwojoalMwO7dLGa8y5XewUSE= From: Lorenzo Bianconi To: netdev@vger.kernel.org Cc: davem@davemloft.net, ilias.apalodimas@linaro.org, brouer@redhat.com, lorenzo.bianconi@redhat.com, mcroce@redhat.com, jonathan.lemon@gmail.com Subject: [PATCH v5 net-next 0/3] add DMA-sync-for-device capability to page_pool API Date: Wed, 20 Nov 2019 16:54:16 +0200 Message-Id: X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Introduce the possibility to sync DMA memory for device in the page_pool API. This feature allows to sync proper DMA size and not always full buffer (dma_sync_single_for_device can be very costly). Please note DMA-sync-for-CPU is still device driver responsibility. Relying on page_pool DMA sync mvneta driver improves XDP_DROP pps of about 170Kpps: - XDP_DROP DMA sync managed by mvneta driver: ~420Kpps - XDP_DROP DMA sync managed by page_pool API: ~585Kpps Do not change naming convention for the moment since the changes will hit other drivers as well. I will address it in another series. Changes since v4: - do not allow the driver to set max_len to 0 - convert PP_FLAG_DMA_MAP/PP_FLAG_DMA_SYNC_DEV to BIT() macro Changes since v3: - move dma_sync_for_device before putting the page in ptr_ring in __page_pool_recycle_into_ring since ptr_ring can be consumed concurrently. Simplify the code moving dma_sync_for_device before running __page_pool_recycle_direct/__page_pool_recycle_into_ring Changes since v2: - rely on PP_FLAG_DMA_SYNC_DEV flag instead of dma_sync Changes since v1: - rename sync in dma_sync - set dma_sync_size to 0xFFFFFFFF in page_pool_recycle_direct and page_pool_put_page routines - Improve documentation Lorenzo Bianconi (3): net: mvneta: rely on page_pool_recycle_direct in mvneta_run_xdp net: page_pool: add the possibility to sync DMA memory for device net: mvneta: get rid of huge dma sync in mvneta_rx_refill drivers/net/ethernet/marvell/mvneta.c | 24 +++++++++++------- include/net/page_pool.h | 24 +++++++++++++----- net/core/page_pool.c | 36 +++++++++++++++++++++++++-- 3 files changed, 67 insertions(+), 17 deletions(-) -- 2.21.0