From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Adrian Hunter <adrian.hunter@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH mmc-next v3 2/3] mmc: sdhci: introduce adma_write_desc() hook to struct sdhci_ops
Date: Mon, 30 Jul 2018 10:45:31 +0800 [thread overview]
Message-ID: <20180730104531.388b4f39@xhacker.debian> (raw)
In-Reply-To: <20180730104228.28b58bd0@xhacker.debian>
Add this hook so that it can be overridden with driver specific
implementations. We also rename the original sdhci_adma_write_desc()
to _sdhci_adma_write_desc() and export it, so that it could be reused
by driver's specific implementations.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
drivers/mmc/host/sdhci.c | 31 +++++++++++++++++++++++--------
drivers/mmc/host/sdhci.h | 6 ++++++
2 files changed, 29 insertions(+), 8 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 14dd4a49e03b..50c846d99182 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -554,8 +554,8 @@ static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
local_irq_restore(*flags);
}
-static void sdhci_adma_write_desc(struct sdhci_host *host, void *desc,
- dma_addr_t addr, int len, unsigned cmd)
+unsigned int _sdhci_adma_write_desc(struct sdhci_host *host, void *desc,
+ dma_addr_t addr, int len, unsigned int cmd)
{
struct sdhci_adma2_64_desc *dma_desc = desc;
@@ -566,6 +566,19 @@ static void sdhci_adma_write_desc(struct sdhci_host *host, void *desc,
if (host->flags & SDHCI_USE_64_BIT_DMA)
dma_desc->addr_hi = cpu_to_le32((u64)addr >> 32);
+
+ return host->desc_sz;
+}
+EXPORT_SYMBOL_GPL(_sdhci_adma_write_desc);
+
+static unsigned int sdhci_adma_write_desc(struct sdhci_host *host, void *desc,
+ dma_addr_t addr, int len,
+ unsigned int cmd)
+{
+ if (host->ops->adma_write_desc)
+ return host->ops->adma_write_desc(host, desc, addr, len, cmd);
+
+ return _sdhci_adma_write_desc(host, desc, addr, len, cmd);
}
static void sdhci_adma_mark_end(void *desc)
@@ -585,6 +598,7 @@ static void sdhci_adma_table_pre(struct sdhci_host *host,
void *desc, *align;
char *buffer;
int len, offset, i;
+ unsigned int desc_sz;
/*
* The spec does not specify endianness of descriptor table.
@@ -618,15 +632,16 @@ static void sdhci_adma_table_pre(struct sdhci_host *host,
}
/* tran, valid */
- sdhci_adma_write_desc(host, desc, align_addr, offset,
- ADMA2_TRAN_VALID);
+ desc_sz = sdhci_adma_write_desc(host, desc,
+ align_addr, offset,
+ ADMA2_TRAN_VALID);
BUG_ON(offset > 65536);
align += SDHCI_ADMA2_ALIGN;
align_addr += SDHCI_ADMA2_ALIGN;
- desc += host->desc_sz;
+ desc += desc_sz;
addr += offset;
len -= offset;
@@ -636,9 +651,9 @@ static void sdhci_adma_table_pre(struct sdhci_host *host,
if (len) {
/* tran, valid */
- sdhci_adma_write_desc(host, desc, addr, len,
- ADMA2_TRAN_VALID);
- desc += host->desc_sz;
+ desc_sz = sdhci_adma_write_desc(host, desc, addr, len,
+ ADMA2_TRAN_VALID);
+ desc += desc_sz;
}
/*
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index d55fd7033e93..0aad0ee8f63b 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -605,6 +605,9 @@ struct sdhci_ops {
void (*adma_workaround)(struct sdhci_host *host, u32 intmask);
void (*card_event)(struct sdhci_host *host);
void (*voltage_switch)(struct sdhci_host *host);
+ unsigned int (*adma_write_desc)(struct sdhci_host *host, void *desc,
+ dma_addr_t addr, int len,
+ unsigned int cmd);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
@@ -735,6 +738,9 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
struct mmc_ios *ios);
void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable);
+unsigned int _sdhci_adma_write_desc(struct sdhci_host *host, void *desc,
+ dma_addr_t addr, int len,
+ unsigned int cmd);
#ifdef CONFIG_PM
int sdhci_suspend_host(struct sdhci_host *host);
--
2.18.0
next prev parent reply other threads:[~2018-07-30 2:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-30 2:42 [PATCH mmc-next v3 0/3] solve SDHCI DWC MSHC 128MB DMA boundary limitation Jisheng Zhang
2018-07-30 2:45 ` Jisheng Zhang [this message]
2018-08-15 14:07 ` [PATCH mmc-next v3 2/3] mmc: sdhci: introduce adma_write_desc() hook to struct sdhci_ops Adrian Hunter
2018-07-30 2:46 ` [PATCH mmc-next v3 3/3] mmc: sdhci-of-dwcmshc: solve 128MB DMA boundary limitation Jisheng Zhang
[not found] ` <01010164e91d7bda-aa616cbf-7bb2-4fe4-85e5-a18e16433fde-000000@us-west-2.amazonses.com>
2018-07-30 2:59 ` Jisheng Zhang
[not found] ` <01010164e92bcc1a-c3ac69eb-f6e5-4420-ac87-de1a0ffd0ac5-000000@us-west-2.amazonses.com>
2018-07-30 3:11 ` Jisheng Zhang
2018-08-09 2:27 ` [PATCH mmc-next v3 0/3] solve SDHCI DWC MSHC " Jisheng Zhang
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