linux-kernel - [PATCH V2 13/27] mmc: mmci: add dma

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Date:   Fri, 21 Sep 2018 11:46:07 +0200
From:   Ludovic Barre <ludovic.Barre@...com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        <benjamin.gaignard@...aro.org>, Gerald Baeza <gerald.baeza@...com>,
        Loic Pallardy <loic.pallardy@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-mmc@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Ludovic Barre <ludovic.barre@...com>
Subject: [PATCH V2 13/27] mmc: mmci: add dma_error callback

From: Ludovic Barre <ludovic.barre@...com>

This patch adds dma_error callback at mmci_host_ops
to allow to call specific variant.

Signed-off-by: Ludovic Barre <ludovic.barre@...com>
---
 drivers/mmc/host/mmci.c          | 20 +++++++++++---------
 drivers/mmc/host/mmci.h          |  2 ++
 drivers/mmc/host/mmci_qcom_dml.c |  1 +
 3 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 1158d5c..5a8b09c 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -453,6 +453,12 @@ void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data)
 		host->ops->dma_finalize(host, data);
 }
 
+void mmci_dma_error(struct mmci_host *host)
+{
+	if (host->ops && host->ops->dma_error)
+		host->ops->dma_error(host);
+}
+
 static void
 mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
 {
@@ -615,7 +621,7 @@ static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data)
 		     mmc_get_dma_dir(data));
 }
 
-static void mmci_dma_data_error(struct mmci_host *host)
+void mmci_dmae_error(struct mmci_host *host)
 {
 	struct mmci_dmae_priv *dmae = host->dma_priv;
 
@@ -656,7 +662,7 @@ void mmci_dmae_finalize(struct mmci_host *host, struct mmc_data *data)
 	 * contiguous buffers.  On TX, we'll get a FIFO underrun error.
 	 */
 	if (status & MCI_RXDATAAVLBLMASK) {
-		mmci_dma_data_error(host);
+		mmci_dma_error(host);
 		if (!data->error)
 			data->error = -EIO;
 	} else if (!data->host_cookie) {
@@ -827,13 +833,9 @@ static struct mmci_host_ops mmci_variant_ops = {
 	.dma_release = mmci_dmae_release,
 	.dma_start = mmci_dmae_start,
 	.dma_finalize = mmci_dmae_finalize,
+	.dma_error = mmci_dmae_error,
 };
 #else
-/* Blank functions if the DMA engine is not available */
-static inline void mmci_dma_data_error(struct mmci_host *host)
-{
-}
-
 static struct mmci_host_ops mmci_variant_ops = {};
 #endif
 
@@ -1011,7 +1013,7 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
 		u32 remain, success;
 
 		/* Terminate the DMA transfer */
-		mmci_dma_data_error(host);
+		mmci_dma_error(host);
 
 		/*
 		 * Calculate how far we are into the transfer.  Note that
@@ -1157,7 +1159,7 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
 	if ((!sbc && !cmd->data) || cmd->error) {
 		if (host->data) {
 			/* Terminate the DMA transfer */
-			mmci_dma_data_error(host);
+			mmci_dma_error(host);
 
 			mmci_stop_data(host);
 		}
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index b793cfb..320f122 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -282,6 +282,7 @@ struct mmci_host_ops {
 	void (*dma_release)(struct mmci_host *host);
 	int (*dma_start)(struct mmci_host *host, unsigned int *datactrl);
 	void (*dma_finalize)(struct mmci_host *host, struct mmc_data *data);
+	void (*dma_error)(struct mmci_host *host);
 };
 
 struct mmci_host {
@@ -341,3 +342,4 @@ 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);
 void mmci_dmae_finalize(struct mmci_host *host, struct mmc_data *data);
+void mmci_dmae_error(struct mmci_host *host);
diff --git a/drivers/mmc/host/mmci_qcom_dml.c b/drivers/mmc/host/mmci_qcom_dml.c
index f1fd48a..a352115 100644
--- a/drivers/mmc/host/mmci_qcom_dml.c
+++ b/drivers/mmc/host/mmci_qcom_dml.c
@@ -189,6 +189,7 @@ static struct mmci_host_ops qcom_variant_ops = {
 	.dma_release = mmci_dmae_release,
 	.dma_start = mmci_dmae_start,
 	.dma_finalize = mmci_dmae_finalize,
+	.dma_error = mmci_dmae_error,
 };
 
 void qcom_variant_init(struct mmci_host *host)
-- 
2.7.4