ARM: highbank: enable DMA zone for LPAE (a6a39834) · Commits · 戴 / test

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>

arch/arm/mach-highbank/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -18,3 +18,4 @@ config ARCH_HIGHBANK
		select PL320_MBOX
		select SPARSE_IRQ
		select USE_OF
		select ZONE_DMA if ARM_LPAE

arch/arm/mach-highbank/highbank.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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,

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