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mmc: mmci: add prepare/unprepare_data callbacks 

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>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ludovic Barre 2018-10-08 14:08:36 +02:00 committed by Ulf Hansson
parent ad7b8918db
commit 4798351018
3 changed files with 79 additions and 34 deletions
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103
drivers/mmc/host/mmci.c
View File

@ -392,6 +392,31 @@ void mmci_dma_setup(struct mmci_host *host)
host->use_dma = true;
}
int mmci_prep_data(struct mmci_host *host, struct mmc_data *data, bool next)
{
int err;
if (!host->ops || !host->ops->prep_data)
return 0;
err = host->ops->prep_data(host, data, next);
if (next && !err)
data->host_cookie = ++host->next_cookie < 0 ?
1 : host->next_cookie;
return err;
}
void mmci_unprep_data(struct mmci_host *host, struct mmc_data *data,
int err)
{
if (host->ops && host->ops->unprep_data)
host->ops->unprep_data(host, data, err);
data->host_cookie = 0;
}
static void
mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
{
@ -619,7 +644,7 @@ 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,
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)
{
@ -682,21 +707,24 @@ static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
return -ENOMEM;
}
static inline int mmci_dma_prep_data(struct mmci_host *host,
struct mmc_data *data,
bool next)
int mmci_dmae_prep_data(struct mmci_host *host,
struct mmc_data *data,
bool next)
{
struct mmci_dmae_priv *dmae = host->dma_priv;
struct mmci_dmae_next *nd = &dmae->next_data;
if (!host->use_dma)
return -EINVAL;
if (next)
return __mmci_dma_prep_data(host, data, &nd->chan, &nd->desc);
return _mmci_dmae_prep_data(host, data, &nd->chan, &nd->desc);
/* Check if next job is already prepared. */
if (dmae->cur && dmae->desc_current)
return 0;
/* No job were prepared thus do it now. */
return __mmci_dma_prep_data(host, data, &dmae->cur,
return _mmci_dmae_prep_data(host, data, &dmae->cur,
&dmae->desc_current);
}
@ -709,7 +737,7 @@ static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl)
if (!host->use_dma)
return -EINVAL;
ret = mmci_dma_prep_data(host, host->data, false);
ret = mmci_dmae_prep_data(host, host->data, false);
if (ret)
return ret;
@ -756,32 +784,13 @@ static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data)
next->chan = NULL;
}
static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq)
void mmci_dmae_unprep_data(struct mmci_host *host,
struct mmc_data *data, int err)
{
struct mmci_host *host = mmc_priv(mmc);
struct mmc_data *data = mrq->data;
if (!host->use_dma || !data)
return;
BUG_ON(data->host_cookie);
if (mmci_validate_data(host, data))
return;
if (!mmci_dma_prep_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 mmci_dmae_priv *dmae = host->dma_priv;
struct mmc_data *data = mrq->data;
if (!host->use_dma || !data || !data->host_cookie)
if (!host->use_dma)
return;
mmci_dma_unmap(host, data);
@ -805,11 +814,12 @@ static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
next->desc = NULL;
next->chan = NULL;
data->host_cookie = 0;
}
}
static struct mmci_host_ops mmci_variant_ops = {
.prep_data = mmci_dmae_prep_data,
.unprep_data = mmci_dmae_unprep_data,
.dma_setup = mmci_dmae_setup,
.dma_release = mmci_dmae_release,
};
@ -838,11 +848,36 @@ 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
#endif
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_prep_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_unprep_data(host, data, err);
}
static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
{
struct variant_data *variant = host->variant;

8
drivers/mmc/host/mmci.h
View File

@ -273,6 +273,10 @@ struct variant_data {
/* mmci variant callbacks */
struct mmci_host_ops {
int (*prep_data)(struct mmci_host *host, struct mmc_data *data,
bool next);
void (*unprep_data)(struct mmci_host *host, struct mmc_data *data,
int err);
int (*dma_setup)(struct mmci_host *host);
void (*dma_release)(struct mmci_host *host);
};
@ -327,6 +331,10 @@ struct mmci_host {
#define dma_inprogress(host) ((host)->dma_in_progress)
int mmci_dmae_prep_data(struct mmci_host *host, struct mmc_data *data,
bool next);
void mmci_dmae_unprep_data(struct mmci_host *host, struct mmc_data *data,
int err);
int mmci_dmae_setup(struct mmci_host *host);
void mmci_dmae_release(struct mmci_host *host);

2
drivers/mmc/host/mmci_qcom_dml.c
View File

@ -184,6 +184,8 @@ static int qcom_dma_setup(struct mmci_host *host)
}
static struct mmci_host_ops qcom_variant_ops = {
.prep_data = mmci_dmae_prep_data,
.unprep_data = mmci_dmae_unprep_data,
.dma_setup = qcom_dma_setup,
.dma_release = mmci_dmae_release,
};