From patchwork Thu Nov 7 08:32:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 11232227 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EEE09139A for ; Thu, 7 Nov 2019 08:39:44 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D6D2421D7B for ; Thu, 7 Nov 2019 08:39:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D6D2421D7B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bp.renesas.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=cip-dev-bounces@lists.cip-project.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 58277CB0; Thu, 7 Nov 2019 08:36:07 +0000 (UTC) X-Original-To: cip-dev@lists.cip-project.org Delivered-To: cip-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 9FAA2CB0 for ; Thu, 7 Nov 2019 08:36:05 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 42528756 for ; Thu, 7 Nov 2019 08:36:04 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.68,277,1569250800"; d="scan'208";a="30861001" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 07 Nov 2019 17:36:03 +0900 Received: from be1yocto.ree.adwin.renesas.com (unknown [172.29.43.62]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 2F18941E8BA9; Thu, 7 Nov 2019 17:36:01 +0900 (JST) From: Biju Das To: cip-dev@lists.cip-project.org, Nobuhiro Iwamatsu , Pavel Machek Date: Thu, 7 Nov 2019 08:32:34 +0000 Message-Id: <1573115572-13513-66-git-send-email-biju.das@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1573115572-13513-1-git-send-email-biju.das@bp.renesas.com> References: <1573115572-13513-1-git-send-email-biju.das@bp.renesas.com> X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Cc: Biju Das Subject: [cip-dev] [PATCH 4.4.y-cip 65/83] mmc: renesas-sdhi, tmio: make dma more modular X-BeenThere: cip-dev@lists.cip-project.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: cip-dev-bounces@lists.cip-project.org Errors-To: cip-dev-bounces@lists.cip-project.org From: Simon Horman commit 631fa73cfba8dcfd0d1db8eb608527183ed95648 upstream. Refactor DMA support to allow it to be provided by a set of call-backs that are provided by a host driver. The motivation is to allow multiple DMA implementations to be provided and instantiated at run-time. Instantiate the existing DMA implementation from the sh_mobile_sdhi driver which appears to match the current use-case. This has the side effect of moving the DMA code from the tmio_core to the sh_mobile_sdhi driver. A follow-up patch will change the source file for the SDHI DMA implementation accordingly. Another follow-up patch will re-organise the SDHI driver removing the need for tmio_mmc_get_dma_ops(). Signed-off-by: Simon Horman Acked-by: Arnd Bergmann Reviewed-by: Wolfram Sang Signed-off-by: Ulf Hansson Signed-off-by: Biju Das --- drivers/mmc/host/Makefile | 3 +-- drivers/mmc/host/sh_mobile_sdhi.c | 2 +- drivers/mmc/host/tmio_mmc.c | 2 +- drivers/mmc/host/tmio_mmc.h | 55 ++++++++++++++++----------------------- drivers/mmc/host/tmio_mmc_dma.c | 24 +++++++++++++---- drivers/mmc/host/tmio_mmc_pio.c | 43 +++++++++++++++++++++++++++++- 6 files changed, 86 insertions(+), 43 deletions(-) diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 3595f83..bf399b8 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -37,8 +37,7 @@ obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o obj-$(CONFIG_MMC_TMIO_CORE) += tmio_mmc_core.o tmio_mmc_core-y := tmio_mmc_pio.o -tmio_mmc_core-$(subst m,y,$(CONFIG_MMC_SDHI)) += tmio_mmc_dma.o -obj-$(CONFIG_MMC_SDHI) += sh_mobile_sdhi.o +obj-$(CONFIG_MMC_SDHI) += sh_mobile_sdhi.o tmio_mmc_dma.o obj-$(CONFIG_MMC_CB710) += cb710-mmc.o obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o obj-$(CONFIG_SDH_BFIN) += bfin_sdh.o diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c index a723550..05edac3 100644 --- a/drivers/mmc/host/sh_mobile_sdhi.c +++ b/drivers/mmc/host/sh_mobile_sdhi.c @@ -643,7 +643,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev) /* All SDHI have SDIO status bits which must be 1 */ mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS; - ret = tmio_mmc_host_probe(host, mmc_data); + ret = tmio_mmc_host_probe(host, mmc_data, tmio_mmc_get_dma_ops()); if (ret < 0) goto efree; diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c index ff14311..5988014 100644 --- a/drivers/mmc/host/tmio_mmc.c +++ b/drivers/mmc/host/tmio_mmc.c @@ -97,7 +97,7 @@ static int tmio_mmc_probe(struct platform_device *pdev) /* SD control register space size is 0x200, 0x400 for bus_shift=1 */ host->bus_shift = resource_size(res) >> 10; - ret = tmio_mmc_host_probe(host, pdata); + ret = tmio_mmc_host_probe(host, pdata, NULL); if (ret) goto host_free; diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index d01776e..86aa49f3 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -113,6 +113,15 @@ struct tmio_mmc_dma { void (*enable)(struct tmio_mmc_host *host, bool enable); }; +struct tmio_mmc_dma_ops { + void (*start)(struct tmio_mmc_host *host, struct mmc_data *data); + void (*enable)(struct tmio_mmc_host *host, bool enable); + void (*request)(struct tmio_mmc_host *host, + struct tmio_mmc_data *pdata); + void (*release)(struct tmio_mmc_host *host); + void (*abort)(struct tmio_mmc_host *host); +}; + struct tmio_mmc_host { void __iomem *ctl; struct mmc_command *cmd; @@ -187,12 +196,15 @@ struct tmio_mmc_host { /* Tuning values: 1 for success, 0 for failure */ DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long)); unsigned int tap_num; + + const struct tmio_mmc_dma_ops *dma_ops; }; struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev); void tmio_mmc_host_free(struct tmio_mmc_host *host); int tmio_mmc_host_probe(struct tmio_mmc_host *host, - struct tmio_mmc_data *pdata); + struct tmio_mmc_data *pdata, + const struct tmio_mmc_dma_ops *dma_ops); void tmio_mmc_host_remove(struct tmio_mmc_host *host); void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); @@ -200,6 +212,15 @@ void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); irqreturn_t tmio_mmc_irq(int irq, void *devid); +#if IS_ENABLED(CONFIG_MMC_SDHI) +const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void); +#else +static inline const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void) +{ + return NULL; +} +#endif + static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, unsigned long *flags) { @@ -214,38 +235,6 @@ static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, local_irq_restore(*flags); } -#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) -void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); -void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); -void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); -void tmio_mmc_release_dma(struct tmio_mmc_host *host); -void tmio_mmc_abort_dma(struct tmio_mmc_host *host); -#else -static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, - struct mmc_data *data) -{ -} - -static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) -{ -} - -static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, - struct tmio_mmc_data *pdata) -{ - host->chan_tx = NULL; - host->chan_rx = NULL; -} - -static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) -{ -} - -static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) -{ -} -#endif - #ifdef CONFIG_PM int tmio_mmc_host_runtime_suspend(struct device *dev); int tmio_mmc_host_runtime_resume(struct device *dev); diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c index f668441..e743684 100644 --- a/drivers/mmc/host/tmio_mmc_dma.c +++ b/drivers/mmc/host/tmio_mmc_dma.c @@ -20,7 +20,7 @@ #define TMIO_MMC_MIN_DMA_LEN 8 -void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) +static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) { if (!host->chan_tx || !host->chan_rx) return; @@ -29,7 +29,7 @@ void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) host->dma->enable(host, enable); } -void tmio_mmc_abort_dma(struct tmio_mmc_host *host) +static void tmio_mmc_abort_dma(struct tmio_mmc_host *host) { tmio_mmc_enable_dma(host, false); @@ -218,7 +218,7 @@ pio: } } -void tmio_mmc_start_dma(struct tmio_mmc_host *host, +static void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data) { if (data->flags & MMC_DATA_READ) { @@ -252,7 +252,8 @@ static void tmio_mmc_issue_tasklet_fn(unsigned long priv) dma_async_issue_pending(chan); } -void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata) +static void tmio_mmc_request_dma(struct tmio_mmc_host *host, + struct tmio_mmc_data *pdata) { /* We can only either use DMA for both Tx and Rx or not use it at all */ if (!host->dma || (!host->pdev->dev.of_node && @@ -332,7 +333,7 @@ ecfgtx: host->chan_tx = NULL; } -void tmio_mmc_release_dma(struct tmio_mmc_host *host) +static void tmio_mmc_release_dma(struct tmio_mmc_host *host) { if (host->chan_tx) { struct dma_chan *chan = host->chan_tx; @@ -349,3 +350,16 @@ void tmio_mmc_release_dma(struct tmio_mmc_host *host) host->bounce_buf = NULL; } } + +static const struct tmio_mmc_dma_ops tmio_mmc_dma_ops = { + .start = tmio_mmc_start_dma, + .enable = tmio_mmc_enable_dma, + .request = tmio_mmc_request_dma, + .release = tmio_mmc_release_dma, + .abort = tmio_mmc_abort_dma, +}; + +const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void) +{ + return &tmio_mmc_dma_ops; +} diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index 9b95158..8ab58ca 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -50,17 +50,55 @@ #include "tmio_mmc.h" +static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, + struct mmc_data *data) +{ + if (host->dma_ops) + host->dma_ops->start(host, data); +} + +static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) +{ + if (host->dma_ops) + host->dma_ops->enable(host, enable); +} + +static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, + struct tmio_mmc_data *pdata) +{ + if (host->dma_ops) { + host->dma_ops->request(host, pdata); + } else { + host->chan_tx = NULL; + host->chan_rx = NULL; + } +} + +static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) +{ + if (host->dma_ops) + host->dma_ops->release(host); +} + +static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) +{ + if (host->dma_ops) + host->dma_ops->abort(host); +} + void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) { host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); } +EXPORT_SYMBOL(tmio_mmc_enable_mmc_irqs); void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) { host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); } +EXPORT_SYMBOL(tmio_mmc_disable_mmc_irqs); static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) { @@ -563,6 +601,7 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) schedule_work(&host->done); } +EXPORT_SYMBOL(tmio_mmc_do_data_irq); static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat) { @@ -1142,7 +1181,8 @@ void tmio_mmc_host_free(struct tmio_mmc_host *host) EXPORT_SYMBOL(tmio_mmc_host_free); int tmio_mmc_host_probe(struct tmio_mmc_host *_host, - struct tmio_mmc_data *pdata) + struct tmio_mmc_data *pdata, + const struct tmio_mmc_dma_ops *dma_ops) { struct platform_device *pdev = _host->pdev; struct mmc_host *mmc = _host->mmc; @@ -1254,6 +1294,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, INIT_WORK(&_host->done, tmio_mmc_done_work); /* See if we also get DMA */ + _host->dma_ops = dma_ops; tmio_mmc_request_dma(_host, pdata); pm_runtime_set_active(&pdev->dev);