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authorRob Herring <rob.herring@calxeda.com>2013-08-02 00:50:55 +0400
committerRob Herring <rob.herring@calxeda.com>2013-08-18 04:43:56 +0400
commita6a398341d5d073a717858b4488a7abe5f242cf2 (patch)
tree726d05f0b8373c6fbde3fd13ac06b1df5500e214 /arch/arm
parent364230b9952143eb2062dc071e919fb751540ae8 (diff)
downloadlinux-a6a398341d5d073a717858b4488a7abe5f242cf2.tar.xz
ARM: highbank: enable DMA zone for LPAE
Some devices are restricted to 32-bit DMA. Thus the platform dma_zone_size needs to be set. Otherwise dma-mapping code is complaining, e.g. calxedaxgmac fff50000.ethernet: coherent DMA mask 0xffffffff is smaller than system GFP_DMA mask 0xffffffffffffffff Signed-off-by: Andreas Herrmann <andreas.herrmann@calxeda.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-highbank/Kconfig1
-rw-r--r--arch/arm/mach-highbank/highbank.c3
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-highbank/Kconfig b/arch/arm/mach-highbank/Kconfig
index cd9fcb1cd7ab..efe49610ec4c 100644
--- a/arch/arm/mach-highbank/Kconfig
+++ b/arch/arm/mach-highbank/Kconfig
@@ -18,3 +18,4 @@ config ARCH_HIGHBANK
select PL320_MBOX
select SPARSE_IRQ
select USE_OF
+ select ZONE_DMA if ARM_LPAE
diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index 88815795fe26..0749b42f33c9 100644
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -176,6 +176,9 @@ static const char *highbank_match[] __initconst = {
};
DT_MACHINE_START(HIGHBANK, "Highbank")
+#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
+ .dma_zone_size = (4ULL * SZ_1G),
+#endif
.smp = smp_ops(highbank_smp_ops),
.init_irq = highbank_init_irq,
.init_time = highbank_timer_init,