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 v6 1/3] mmc: sdhci: add adma_table_cnt member to struct sdhci_host
Date: Tue, 28 Aug 2018 17:46:35 +0800 [thread overview]
Message-ID: <20180828174635.4bba02ee@xhacker.debian> (raw)
In-Reply-To: <20180828174534.00fb5e24@xhacker.debian>
This patch adds adma_table_cnt member to struct sdhci_host to give more
flexibility to drivers to control the ADMA table count.
Default value of adma_table_cnt is set to (SDHCI_MAX_SEGS * 2 + 1).
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/mmc/host/sdhci.c | 17 +++++++++--------
drivers/mmc/host/sdhci.h | 3 +++
2 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 1b3fbd9bd5c5..52ccf4644384 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3322,6 +3322,13 @@ struct sdhci_host *sdhci_alloc_host(struct device *dev,
host->sdma_boundary = SDHCI_DEFAULT_BOUNDARY_ARG;
+ /*
+ * The DMA table descriptor count is calculated as the maximum
+ * number of segments times 2, to allow for an alignment
+ * descriptor for each segment, plus 1 for a nop end descriptor.
+ */
+ host->adma_table_cnt = SDHCI_MAX_SEGS * 2 + 1;
+
return host;
}
@@ -3567,18 +3574,12 @@ int sdhci_setup_host(struct sdhci_host *host)
dma_addr_t dma;
void *buf;
- /*
- * The DMA descriptor table size is calculated as the maximum
- * number of segments times 2, to allow for an alignment
- * descriptor for each segment, plus 1 for a nop end descriptor,
- * all multipled by the descriptor size.
- */
if (host->flags & SDHCI_USE_64_BIT_DMA) {
- host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) *
+ host->adma_table_sz = host->adma_table_cnt *
SDHCI_ADMA2_64_DESC_SZ;
host->desc_sz = SDHCI_ADMA2_64_DESC_SZ;
} else {
- host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) *
+ host->adma_table_sz = host->adma_table_cnt *
SDHCI_ADMA2_32_DESC_SZ;
host->desc_sz = SDHCI_ADMA2_32_DESC_SZ;
}
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index f0bd36ce3817..25bddd21de31 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -563,6 +563,9 @@ struct sdhci_host {
/* Host SDMA buffer boundary. */
u32 sdma_boundary;
+ /* Host ADMA table count */
+ u32 adma_table_cnt;
+
u64 data_timeout;
unsigned long private[0] ____cacheline_aligned;
--
2.18.0
next prev parent reply other threads:[~2018-08-28 9:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-28 9:45 [PATCH v6 0/3] solve SDHCI DWC MSHC 128MB DMA boundary limitation Jisheng Zhang
2018-08-28 9:46 ` Jisheng Zhang [this message]
2018-08-28 9:47 ` [PATCH v6 2/3] mmc: sdhci: introduce adma_write_desc() hook to struct sdhci_ops Jisheng Zhang
2018-08-28 9:48 ` [PATCH v6 3/3] mmc: sdhci-of-dwcmshc: solve 128MB DMA boundary limitation Jisheng Zhang
2018-08-28 10:47 ` Adrian Hunter
2018-08-28 11:41 ` [PATCH v6 0/3] solve SDHCI DWC MSHC " Ulf Hansson
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