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Subject[PATCH 07/14] mmc: mmci: add prepare/unprepare_data callbacks
Date
From: Ludovic Barre <ludovic.barre@st.com>

This patch adds prepare/unprepare callbacks to mmci_host_ops.
Like this mmci_pre/post_request can be generic, mmci_prepare_data
and mmci_unprepare_data provide common next_cookie management.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/mmc/host/mmci.c | 118 +++++++++++++++++++++++++++------------
drivers/mmc/host/mmci.h | 10 ++++
drivers/mmc/host/mmci_qcom_dml.c | 2 +
3 files changed, 93 insertions(+), 37 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index e4d80f1..345aa2e 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -58,6 +58,7 @@ static struct variant_data variant_arm = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_ROD,
+ .init = mmci_variant_init,
};

static struct variant_data variant_arm_extended_fifo = {
@@ -69,6 +70,7 @@ static struct variant_data variant_arm_extended_fifo = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_ROD,
+ .init = mmci_variant_init,
};

static struct variant_data variant_arm_extended_fifo_hwfc = {
@@ -81,6 +83,7 @@ static struct variant_data variant_arm_extended_fifo_hwfc = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_ROD,
+ .init = mmci_variant_init,
};

static struct variant_data variant_u300 = {
@@ -99,6 +102,7 @@ static struct variant_data variant_u300 = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_OD,
+ .init = mmci_variant_init,
};

static struct variant_data variant_nomadik = {
@@ -118,6 +122,7 @@ static struct variant_data variant_nomadik = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_OD,
+ .init = mmci_variant_init,
};

static struct variant_data variant_ux500 = {
@@ -143,6 +148,7 @@ static struct variant_data variant_ux500 = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_OD,
+ .init = mmci_variant_init,
};

static struct variant_data variant_ux500v2 = {
@@ -170,6 +176,7 @@ static struct variant_data variant_ux500v2 = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_OD,
+ .init = mmci_variant_init,
};

static struct variant_data variant_stm32 = {
@@ -187,6 +194,7 @@ static struct variant_data variant_stm32 = {
.f_max = 48000000,
.pwrreg_clkgate = true,
.pwrreg_nopower = true,
+ .init = mmci_variant_init,
};

static struct variant_data variant_qcom = {
@@ -357,6 +365,31 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
mmci_write_clkreg(host, clk);
}

+int mmci_prepare_data(struct mmci_host *host, struct mmc_data *data, bool next)
+{
+ int err;
+
+ if (!host->ops || !host->ops->prepare_data)
+ return 0;
+
+ err = host->ops->prepare_data(host, data, next);
+
+ if (next && !err)
+ data->host_cookie = ++host->next_cookie < 0 ?
+ 1 : host->next_cookie;
+
+ return err;
+}
+
+void mmci_unprepare_data(struct mmci_host *host, struct mmc_data *data,
+ int err)
+{
+ if (host->ops && host->ops->unprepare_data)
+ host->ops->unprepare_data(host, data, err);
+
+ data->host_cookie = 0;
+}
+
static void
mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
{
@@ -588,9 +621,9 @@ static void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data)
}

/* prepares DMA channel and DMA descriptor, returns non-zero on failure */
-static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
- struct dma_chan **dma_chan,
- struct dma_async_tx_descriptor **dma_desc)
+static int __mmci_dmae_prep_data(struct mmci_host *host, struct mmc_data *data,
+ struct dma_chan **dma_chan,
+ struct dma_async_tx_descriptor **dma_desc)
{
struct dmaengine_priv *dmae = host->dma_priv;
struct variant_data *variant = host->variant;
@@ -651,22 +684,21 @@ static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
return -ENOMEM;
}

-static inline int mmci_dma_prepare_data(struct mmci_host *host,
- struct mmc_data *data,
- bool next)
+int mmci_dmae_prepare_data(struct mmci_host *host,
+ struct mmc_data *data, bool next)
{
struct dmaengine_priv *dmae = host->dma_priv;
struct dmaengine_next *nd = &dmae->next_data;

if (next)
- return __mmci_dma_prep_data(host, data, &nd->dma_chan,
+ return __mmci_dmae_prep_data(host, data, &nd->dma_chan,
&nd->dma_desc);
/* Check if next job is already prepared. */
if (dmae->dma_current && dmae->dma_desc_current)
return 0;

/* No job were prepared thus do it now. */
- return __mmci_dma_prep_data(host, data, &dmae->dma_current,
+ return __mmci_dmae_prep_data(host, data, &dmae->dma_current,
&dmae->dma_desc_current);
}

@@ -676,7 +708,7 @@ static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl)
struct mmc_data *data = host->data;
int ret;

- ret = mmci_dma_prepare_data(host, host->data, false);
+ ret = mmci_prepare_data(host, host->data, false);
if (ret)
return ret;

@@ -720,33 +752,11 @@ static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data)
next->dma_chan = NULL;
}

-static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq)
-{
- struct mmci_host *host = mmc_priv(mmc);
- struct mmc_data *data = mrq->data;
-
- if (!data)
- return;
-
- BUG_ON(data->host_cookie);
-
- if (mmci_validate_data(host, data))
- return;
+void mmci_dmae_unprepare_data(struct mmci_host *host,
+ struct mmc_data *data, int err)

- if (!mmci_dma_prepare_data(host, data, true))
- data->host_cookie = ++host->next_cookie < 0 ?
- 1 : host->next_cookie;
-}
-
-static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
- int err)
{
- struct mmci_host *host = mmc_priv(mmc);
struct dmaengine_priv *dmae = host->dma_priv;
- struct mmc_data *data = mrq->data;
-
- if (!data || !data->host_cookie)
- return;

__mmci_dmae_unmap(host, data);

@@ -769,10 +779,13 @@ static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,

next->dma_desc = NULL;
next->dma_chan = NULL;
- data->host_cookie = 0;
}
}

+static struct mmci_host_ops mmci_variant_ops = {
+ .prepare_data = mmci_dmae_prepare_data,
+ .unprepare_data = mmci_dmae_unprepare_data,
+};
#else
/* Blank functions if the DMA engine is not available */
static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data)
@@ -802,11 +815,42 @@ static inline int mmci_dma_start_data(struct mmci_host *host, unsigned int datac
return -ENOSYS;
}

-#define mmci_pre_request NULL
-#define mmci_post_request NULL
-
+static struct mmci_host_ops mmci_variant_ops = {};
#endif

+void mmci_variant_init(struct mmci_host *host)
+{
+ host->ops = &mmci_variant_ops;
+}
+
+static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct mmci_host *host = mmc_priv(mmc);
+ struct mmc_data *data = mrq->data;
+
+ if (!data)
+ return;
+
+ WARN_ON(data->host_cookie);
+
+ if (mmci_validate_data(host, data))
+ return;
+
+ mmci_prepare_data(host, data, true);
+}
+
+static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
+ int err)
+{
+ struct mmci_host *host = mmc_priv(mmc);
+ struct mmc_data *data = mrq->data;
+
+ if (!data || !data->host_cookie)
+ return;
+
+ mmci_unprepare_data(host, data, err);
+}
+
static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
{
struct variant_data *variant = host->variant;
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index d2ec4fd..fa2702b 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -273,6 +273,10 @@ struct variant_data {

/* mmci variant callbacks */
struct mmci_host_ops {
+ int (*prepare_data)(struct mmci_host *host, struct mmc_data *data,
+ bool next);
+ void (*unprepare_data)(struct mmci_host *host, struct mmc_data *data,
+ int err);
int (*dma_setup)(struct mmci_host *host);
};

@@ -323,3 +327,9 @@ struct mmci_host {
};

void qcom_variant_init(struct mmci_host *host);
+void mmci_variant_init(struct mmci_host *host);
+
+int mmci_dmae_prepare_data(struct mmci_host *host, struct mmc_data *data,
+ bool next);
+void mmci_dmae_unprepare_data(struct mmci_host *host,
+ struct mmc_data *data, int err);
diff --git a/drivers/mmc/host/mmci_qcom_dml.c b/drivers/mmc/host/mmci_qcom_dml.c
index 1bb59cf..d534fa1 100644
--- a/drivers/mmc/host/mmci_qcom_dml.c
+++ b/drivers/mmc/host/mmci_qcom_dml.c
@@ -180,6 +180,8 @@ static int qcom_dma_setup(struct mmci_host *host)
}

static struct mmci_host_ops qcom_variant_ops = {
+ .prepare_data = mmci_dmae_prepare_data,
+ .unprepare_data = mmci_dmae_unprepare_data,
.dma_setup = qcom_dma_setup,
};

--
2.7.4
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