From patchwork Wed Jun 5 11:11:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 10976647 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 D2E7976 for ; Wed, 5 Jun 2019 11:16:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C643928500 for ; Wed, 5 Jun 2019 11:16:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BA8FE28569; Wed, 5 Jun 2019 11:16:58 +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 4FE7927FA5 for ; Wed, 5 Jun 2019 11:16:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727198AbfFELQ5 (ORCPT ); Wed, 5 Jun 2019 07:16:57 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:62646 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727434AbfFELQ4 (ORCPT ); Wed, 5 Jun 2019 07:16:56 -0400 X-IronPort-AV: E=Sophos;i="5.60,550,1549897200"; d="scan'208";a="17680362" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 05 Jun 2019 20:16:53 +0900 Received: from localhost.localdomain (unknown [10.166.17.210]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id B64F141BD76A; Wed, 5 Jun 2019 20:16:53 +0900 (JST) From: Yoshihiro Shimoda To: ulf.hansson@linaro.org, wsa+renesas@sang-engineering.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, joro@8bytes.org Cc: linux-mmc@vger.kernel.org, iommu@lists.linux-foundation.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [RFC PATCH v5 8/8] mmc: renesas_sdhi: use multiple segments if possible Date: Wed, 5 Jun 2019 20:11:54 +0900 Message-Id: <1559733114-4221-9-git-send-email-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559733114-4221-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> References: <1559733114-4221-1-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 If the IOMMU driver has a capable for merging segments to a segment strictly, this can expose the host->mmc->max_segs with multiple segments to a block layer by using blk_queue_max_segments() that mmc_setup_queue() calls. Notes that an sdio card may be possible to use multiple segments with non page aligned size, so that this will not expose multiple segments to avoid failing dma_map_sg() every time. Notes that 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 | 27 +++++++++++++++++++++++++++ drivers/mmc/host/renesas_sdhi_internal_dmac.c | 4 ++++ 2 files changed, 31 insertions(+) diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index c5ee4a6..379cefa 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -20,6 +20,7 @@ #include #include +#include #include #include #include @@ -46,6 +47,8 @@ #define SDHI_VER_GEN3_SD 0xcc10 #define SDHI_VER_GEN3_SDMMC 0xcd10 +#define SDHI_MAX_SEGS_IN_IOMMU 512 + struct renesas_sdhi_quirks { bool hs400_disabled; bool hs400_4taps; @@ -203,6 +206,28 @@ 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 the IOMMU driver has a capable for merging segments to + * a segment strictly, this can expose the host->mmc->max_segs with + * multiple segments to a block layer by using blk_queue_max_segments() + * that mmc_setup_queue() calls. Notes that an sdio card may be + * possible to use multiple segments with non page aligned size, so + * that this will not expose multiple segments to avoid failing + * dma_map_sg() every time. + */ + if (host->pdata->max_segs < SDHI_MAX_SEGS_IN_IOMMU && + iommu_capable(host->pdev->dev.bus, IOMMU_CAP_MERGING) && + (mmc_card_mmc(card) || mmc_card_sd(card))) + host->mmc->max_segs = SDHI_MAX_SEGS_IN_IOMMU; + else + host->mmc->max_segs = host->pdata->max_segs ? : + TMIO_DEFAULT_MAX_SEGS; +} + static int renesas_sdhi_card_busy(struct mmc_host *mmc) { struct tmio_mmc_host *host = mmc_priv(mmc); @@ -726,6 +751,8 @@ 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 = diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 751fe91..a442f86 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -337,6 +338,9 @@ static int renesas_sdhi_internal_dmac_probe(struct platform_device *pdev) /* value is max of SD_SECCNT. Confirmed by HW engineers */ dma_set_max_seg_size(dev, 0xffffffff); + if (iommu_capable(dev->bus, IOMMU_CAP_MERGING)) + dma_set_iova_contiguous(dev, true); + return renesas_sdhi_probe(pdev, &renesas_sdhi_internal_dmac_dma_ops); }