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Tue, 18 Sep 2018 12:56:20 +0200 Received: from lmecxl0923.lme.st.com (10.48.0.237) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Tue, 18 Sep 2018 12:56:19 +0200 From: Ludovic Barre To: Ulf Hansson , Rob Herring Subject: [PATCH V2 11/27] mmc: mmci: add dma_start callback Date: Tue, 18 Sep 2018 12:55:28 +0200 Message-ID: <1537268144-21152-12-git-send-email-ludovic.Barre@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1537268144-21152-1-git-send-email-ludovic.Barre@st.com> References: <1537268144-21152-1-git-send-email-ludovic.Barre@st.com> MIME-Version: 1.0 X-Originating-IP: [10.48.0.237] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-18_04:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180918_035635_577780_4B88B5C1 X-CRM114-Status: GOOD ( 20.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Maxime Coquelin , Alexandre Torgue , Loic Pallardy , devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Ludovic Barre , benjamin.gaignard@linaro.org, Gerald Baeza , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ludovic Barre This patch adds dma_start callback to mmci_host_ops. Create a generic mmci_dma_start function which regroup common action between variant. Signed-off-by: Ludovic Barre --- drivers/mmc/host/mmci.c | 63 +++++++++++++++++++++++----------------- drivers/mmc/host/mmci.h | 2 ++ drivers/mmc/host/mmci_qcom_dml.c | 1 + 3 files changed, 39 insertions(+), 27 deletions(-) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 562b382..10c7adc 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -415,6 +415,38 @@ void mmci_dma_release(struct mmci_host *host) host->ops->dma_release(host); } +int mmci_dma_start(struct mmci_host *host, unsigned int datactrl) +{ + struct mmc_data *data = host->data; + int ret; + + ret = mmci_prep_data(host, data, false); + if (ret) + return ret; + + if (!host->ops || !host->ops->dma_start) + return -EINVAL; + + /* Okay, go for it. */ + dev_vdbg(mmc_dev(host->mmc), + "Submit MMCI DMA job, sglen %d blksz %04x blks %04x flags %08x\n", + data->sg_len, data->blksz, data->blocks, data->flags); + + host->ops->dma_start(host, &datactrl); + + /* Trigger the DMA transfer */ + mmci_write_datactrlreg(host, datactrl); + + /* + * Let the MMCI say when the data is ended and it's time + * to fire next DMA request. When that happens, MMCI will + * call mmci_data_end() + */ + writel(readl(host->base + MMCIMASK0) | MCI_DATAENDMASK, + host->base + MMCIMASK0); + return 0; +} + static void mmci_request_end(struct mmci_host *host, struct mmc_request *mrq) { @@ -721,20 +753,11 @@ int mmci_dmae_prep_data(struct mmci_host *host, &dmae->desc_current); } -static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) +int mmci_dmae_start(struct mmci_host *host, unsigned int *datactrl) { struct mmci_dmae_priv *dmae = host->dma_priv; struct mmc_data *data = host->data; - int ret; - - ret = mmci_dmae_prep_data(host, host->data, false); - if (ret) - return ret; - /* Okay, go for it. */ - dev_vdbg(mmc_dev(host->mmc), - "Submit MMCI DMA job, sglen %d blksz %04x blks %04x flags %08x\n", - data->sg_len, data->blksz, data->blocks, data->flags); dmae->in_progress = true; dmaengine_submit(dmae->desc_current); dma_async_issue_pending(dmae->cur); @@ -742,18 +765,8 @@ static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) if (host->variant->qcom_dml) dml_start_xfer(host, data); - datactrl |= MCI_DPSM_DMAENABLE; - - /* Trigger the DMA transfer */ - mmci_write_datactrlreg(host, datactrl); + *datactrl |= MCI_DPSM_DMAENABLE; - /* - * Let the MMCI say when the data is ended and it's time - * to fire next DMA request. When that happens, MMCI will - * call mmci_data_end() - */ - writel(readl(host->base + MMCIMASK0) | MCI_DATAENDMASK, - host->base + MMCIMASK0); return 0; } @@ -806,6 +819,7 @@ static struct mmci_host_ops mmci_variant_ops = { .get_next_data = mmci_dmae_get_next_data, .dma_setup = mmci_dmae_setup, .dma_release = mmci_dmae_release, + .dma_start = mmci_dmae_start, }; #else /* Blank functions if the DMA engine is not available */ @@ -818,11 +832,6 @@ static inline void mmci_dma_data_error(struct mmci_host *host) { } -static inline int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) -{ - return -ENOSYS; -} - static struct mmci_host_ops mmci_variant_ops = {}; #endif @@ -925,7 +934,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) * Attempt to use DMA operation mode, if this * should fail, fall back to PIO mode */ - if (!mmci_dma_start_data(host, datactrl)) + if (!mmci_dma_start(host, datactrl)) return; /* IRQ mode, map the SG list for CPU reading/writing */ diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index 5a19114..72f449f 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -280,6 +280,7 @@ struct mmci_host_ops { void (*get_next_data)(struct mmci_host *host, struct mmc_data *data); int (*dma_setup)(struct mmci_host *host); void (*dma_release)(struct mmci_host *host); + int (*dma_start)(struct mmci_host *host, unsigned int *datactrl); }; struct mmci_host { @@ -338,4 +339,5 @@ void mmci_dmae_unprep_data(struct mmci_host *host, struct mmc_data *data, void mmci_dmae_get_next_data(struct mmci_host *host, struct mmc_data *data); int mmci_dmae_setup(struct mmci_host *host); void mmci_dmae_release(struct mmci_host *host); +int mmci_dmae_start(struct mmci_host *host, unsigned int *datactrl); diff --git a/drivers/mmc/host/mmci_qcom_dml.c b/drivers/mmc/host/mmci_qcom_dml.c index e3e195d..e2e756c 100644 --- a/drivers/mmc/host/mmci_qcom_dml.c +++ b/drivers/mmc/host/mmci_qcom_dml.c @@ -187,6 +187,7 @@ static struct mmci_host_ops qcom_variant_ops = { .get_next_data = mmci_dmae_get_next_data, .dma_setup = qcom_dma_setup, .dma_release = mmci_dmae_release, + .dma_start = mmci_dmae_start, }; void qcom_variant_init(struct mmci_host *host)