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| author | Simon Kågström <simon.kagstrom@netinsight.net> | 2014-03-17 14:42:35 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2014-03-18 16:03:43 +0100 |
| commit | bfdad565ae0a61ac943974b8ae61ec0ed55ceb04 (patch) | |
| tree | 8a38af677ffa2f7e9225a543cfbbc8f0b52f28a3 /arch/arm/mach-ixp4xx/common.c | |
| parent | CNS3xxx: Fix PCIe early iotable_init(). (diff) | |
| download | linux-bfdad565ae0a61ac943974b8ae61ec0ed55ceb04.tar.xz linux-bfdad565ae0a61ac943974b8ae61ec0ed55ceb04.zip | |
ARM: ixp4xx: Make dma_set_coherent_mask common, correct implementation
Non-PCI devices can use the entire 32-bit range, PCI dittos are
limited to the first 64MiB.
Also actually setup coherent_dma_mask.
The patch has been verified on a board with 128MiB memory, one
ipx4xx_eth device and a e100 PCI device.
Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-ixp4xx/common.c')
| -rw-r--r-- | arch/arm/mach-ixp4xx/common.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c index 6d68aed6548a..df82a2b4a546 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c @@ -31,6 +31,7 @@ #include <linux/gpio.h> #include <linux/cpu.h> #include <linux/sched_clock.h> +#include <linux/pci.h> #include <mach/udc.h> #include <mach/hardware.h> @@ -578,6 +579,17 @@ void ixp4xx_restart(enum reboot_mode mode, const char *cmd) } } +int dma_set_coherent_mask(struct device *dev, u64 mask) +{ + if (dev_is_pci(dev) && mask >= SZ_64M) + return -EIO; + + dev->coherent_dma_mask = mask; + + return 0; +} +EXPORT_SYMBOL(dma_set_coherent_mask); + #ifdef CONFIG_IXP4XX_INDIRECT_PCI /* * In the case of using indirect PCI, we simply return the actual PCI |