From patchwork Thu Jun 13 10:20:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 10992415 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5162014BB for ; Thu, 13 Jun 2019 15:36:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 419821FFCD for ; Thu, 13 Jun 2019 15:36:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 35FA6212D5; Thu, 13 Jun 2019 15:36:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=AC_FROM_MANY_DOTS,BAYES_00, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD7AC1FFCD for ; Thu, 13 Jun 2019 15:36:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727388AbfFMPgQ (ORCPT ); Thu, 13 Jun 2019 11:36:16 -0400 Received: from relmlor1.renesas.com ([210.160.252.171]:24190 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727375AbfFMKUj (ORCPT ); Thu, 13 Jun 2019 06:20:39 -0400 X-IronPort-AV: E=Sophos;i="5.62,369,1554735600"; d="scan'208";a="18589667" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 13 Jun 2019 19:20:37 +0900 Received: from localhost.localdomain (unknown [10.166.17.210]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 785384274AAF; Thu, 13 Jun 2019 19:20:37 +0900 (JST) From: Yoshihiro Shimoda To: joro@8bytes.org, axboe@kernel.dk, ulf.hansson@linaro.org, wsa+renesas@sang-engineering.com Cc: hch@lst.de, iommu@lists.linux-foundation.org, linux-block@vger.kernel.org, linux-mmc@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [RFC PATCH v6 0/5] treewide: improve R-Car SDHI performance Date: Thu, 13 Jun 2019 19:20:10 +0900 Message-Id: <1560421215-10750-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.7.4 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch series is based on iommu.git / next branch. Since SDHI host internal DMAC of the R-Car Gen3 cannot handle two or more segments, the performance rate (especially, eMMC HS400 reading) is not good. However, if IOMMU is enabled on the DMAC, since IOMMU will map multiple scatter gather buffers as one contignous iova, the DMAC can handle the iova as well and then the performance rate is possible to improve. In fact, I have measured the performance by using bonnie++, "Sequential Input - block" rate was improved on r8a7795. To achieve this, this patch series modifies IOMMU and Block subsystem at first. Since I'd like to get any feedback from each subsystem whether this way is acceptable for upstream, I submit it to treewide with RFC. Changes from v5: - Almost all patches are new code. - [4/5 for MMC] This is a refactor patch so that I don't add any {Tested,Reviewed}-by tags. - [5/5 for MMC] Modify MMC subsystem to use bigger segments instead of the renesas_sdhi driver. - [5/5 for MMC] Use BLK_MAX_SEGMENTS (128) instead of local value SDHI_MAX_SEGS_IN_IOMMU (512). Even if we use BLK_MAX_SEGMENTS, the performance is still good. https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=127511 Changes from v4: - [DMA MAPPING] Add a new device_dma_parameters for iova contiguous. - [IOMMU] Add a new capable for "merging" segments. - [IOMMU] Add a capable ops into the ipmmu-vmsa driver. - [MMC] Sort headers in renesas_sdhi_core.c. - [MMC] Remove the following codes that made on v3 that can be achieved by DMA MAPPING and IOMMU subsystem: -- Check if R-Car Gen3 IPMMU is used or not on patch 3. -- Check if all multiple segment buffers are aligned to PAGE_SIZE on patch 3. https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=125593 Changes from v3: - Use a helper function device_iommu_mapped on patch 1 and 3. - Check if R-Car Gen3 IPMMU is used or not on patch 3. - Check if all multiple segment buffers are aligned to PAGE_SIZE on patch 3. - Add Reviewed-by Wolfram-san on patch 1 and 2. Note that I also got his Reviewed-by on patch 3, but I changed it from v2. So, I didn't add his Reviewed-by at this time. https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=120985 Changes from v2: - Add some conditions in the init_card(). - Add a comment in the init_card(). - Add definitions for some "MAX_SEGS". https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=116729 Changes from v1: - Remove adding init_card ops into struct tmio_mmc_dma_ops and tmio_mmc_host and just set init_card on renesas_sdhi_core.c. - Revise typos on "mmc: tmio: No memory size limitation if runs on IOMMU". - Add Simon-san's Reviewed-by on a tmio patch. https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=110485 Yoshihiro Shimoda (5): iommu: add an exported function to get minimum page size for a domain block: sort headers on blk-setting.c block: add a helper function to merge the segments by an IOMMU mmc: tmio: Use dma_max_mapping_size() instead of a workaround mmc: queue: Use bigger segments if IOMMU can merge the segments block/blk-settings.c | 40 ++++++++++++++++++++++++++++++++++------ drivers/iommu/iommu.c | 18 +++++++++++++++--- drivers/mmc/core/queue.c | 33 +++++++++++++++++++++++++++++---- drivers/mmc/host/tmio_mmc_core.c | 17 ++++------------- include/linux/blkdev.h | 2 ++ include/linux/iommu.h | 1 + include/linux/mmc/host.h | 1 + 7 files changed, 86 insertions(+), 26 deletions(-)