From patchwork Mon May 13 04:29:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 10940215 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 9342B6C5 for ; Mon, 13 May 2019 04:33:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 81876223B3 for ; Mon, 13 May 2019 04:33:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 70CA226E56; Mon, 13 May 2019 04:33:42 +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=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham 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 EB9E8223B3 for ; Mon, 13 May 2019 04:33:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726132AbfEMEdl (ORCPT ); Mon, 13 May 2019 00:33:41 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:43182 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726103AbfEMEdk (ORCPT ); Mon, 13 May 2019 00:33:40 -0400 X-IronPort-AV: E=Sophos;i="5.60,464,1549897200"; d="scan'208";a="15554229" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 13 May 2019 13:33:38 +0900 Received: from localhost.localdomain (unknown [10.166.17.210]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id A627B41836E2; Mon, 13 May 2019 13:33:38 +0900 (JST) From: Yoshihiro Shimoda To: ulf.hansson@linaro.org, wsa+renesas@sang-engineering.com Cc: linux-mmc@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v2 2/2] mmc: renesas_sdhi: use multiple segments if possible Date: Mon, 13 May 2019 13:29:04 +0900 Message-Id: <1557721744-30545-3-git-send-email-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1557721744-30545-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> References: <1557721744-30545-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> 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 In IOMMU environment, since it's possible to merge scatter gather buffers of memory requests to one iova, this patch changes the max_segs value when init_card of mmc_host timing to improve the transfer performance on renesas_sdhi_internal_dmac. Notes that an sdio card may be possible to use scatter gather buffers with non page aligned size, so that this driver will not use multiple segments to avoid any trouble. Also, on renesas_sdhi_sys_dmac, the max_segs value will change from 32 to 512, but the sys_dmac can handle 512 segments, so that this init_card ops is added on "TMIO_MMC_MIN_RCAR2" environment. Signed-off-by: Yoshihiro Shimoda --- drivers/mmc/host/renesas_sdhi_core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 5e9e36e..29a7d66 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -203,6 +203,17 @@ static void renesas_sdhi_clk_disable(struct tmio_mmc_host *host) clk_disable_unprepare(priv->clk_cd); } +static void renesas_sdhi_init_card(struct mmc_host *mmc, struct mmc_card *card) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + if (host->pdev->dev.iommu_group && + (mmc_card_mmc(card) || mmc_card_sd(card))) + host->mmc->max_segs = 512; + else + host->mmc->max_segs = host->pdata->max_segs; +} + static int renesas_sdhi_card_busy(struct mmc_host *mmc) { struct tmio_mmc_host *host = mmc_priv(mmc); @@ -726,6 +737,8 @@ int renesas_sdhi_probe(struct platform_device *pdev, /* SDR speeds are only available on Gen2+ */ if (mmc_data->flags & TMIO_MMC_MIN_RCAR2) { + host->ops.init_card = renesas_sdhi_init_card; + /* card_busy caused issues on r8a73a4 (pre-Gen2) CD-less SDHI */ host->ops.card_busy = renesas_sdhi_card_busy; host->ops.start_signal_voltage_switch =