From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 4 Nov 2014 10:42:43 +0000 (+0200)
Subject: mmc: sdhci: Define maximum segments
X-Git-Tag: firefly_0821_release~176^2~2782^2~61
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4fb213f81fe51ace7dea7d2f7cc2417fa2a2dd9e;p=firefly-linux-kernel-4.4.55.git
mmc: sdhci: Define maximum segments
Define the maximum number of segments instead of
having the constant 128 appearing in the code in
various places.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 053b55df9df1..586c7391a066 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2877,8 +2877,8 @@ int sdhci_add_host(struct sdhci_host *host)
* descriptor for each segment, plus 1 for a nop end descriptor,
* all multipled by the descriptor size.
*/
- host->adma_table_sz = (128 * 2 + 1) * 8;
- host->align_buffer_sz = 128 * 4;
+ host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) * 8;
+ host->align_buffer_sz = SDHCI_MAX_SEGS * 4;
host->desc_sz = 8;
host->align_sz = 4;
host->align_mask = 3;
@@ -3192,11 +3192,11 @@ int sdhci_add_host(struct sdhci_host *host)
* can do scatter/gather or not.
*/
if (host->flags & SDHCI_USE_ADMA)
- mmc->max_segs = 128;
+ mmc->max_segs = SDHCI_MAX_SEGS;
else if (host->flags & SDHCI_USE_SDMA)
mmc->max_segs = 1;
else /* PIO */
- mmc->max_segs = 128;
+ mmc->max_segs = SDHCI_MAX_SEGS;
/*
* Maximum number of sectors in one transfer. Limited by DMA boundary
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 31896a779d4e..6ae75cdd5f41 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -266,6 +266,12 @@
#define SDHCI_DEFAULT_BOUNDARY_SIZE (512 * 1024)
#define SDHCI_DEFAULT_BOUNDARY_ARG (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12)
+/*
+ * Maximum segments assuming a 512KiB maximum requisition size and a minimum
+ * 4KiB page size.
+ */
+#define SDHCI_MAX_SEGS 128
+
struct sdhci_ops {
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
u32 (*read_l)(struct sdhci_host *host, int reg);