diff options
author | Arnd Bergmann <arnd@arndb.de> | 2022-08-25 11:51:42 +0300 |
---|---|---|
committer | Arnd Bergmann <arnd@arndb.de> | 2022-09-15 16:59:16 +0300 |
commit | be7f3f901c619e24c93b8044c074306feedd8ee9 (patch) | |
tree | ab75c282a3d657d40bd3a15d3fb81057cafba8ee /arch/arm/include/asm/dma.h | |
parent | e7536617baec3b4717a37795cec306df9d655d07 (diff) | |
download | linux-be7f3f901c619e24c93b8044c074306feedd8ee9.tar.xz |
ARM: footbridge: remove custom DMA address handling
Footbridge is the last Arm platform that has its own
__virt_to_bus()/__bus_to_virt()/phys_to_dma()/dma_to_phys() abstraction,
but this is just a simple offset now.
For PCI devices, the offset that is programmed into the PCI bridge must
also be set in each device using dma_direct_set_offset(). As Arm does
not have a pcibios_bus_add_device() helper yet, just use a bus notifier
for this.
For the ISA DMA, drivers now pass a non-translated physical address into
set_dma_addr(), so they have to be converted back with the corresponding
isa_bus_to_virt() function and then into the correct bus address with
the offset using the isa_dma_dev.
Tested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/include/asm/dma.h')
-rw-r--r-- | arch/arm/include/asm/dma.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h index 05f29a72150b..c6aded1b069c 100644 --- a/arch/arm/include/asm/dma.h +++ b/arch/arm/include/asm/dma.h @@ -106,7 +106,7 @@ extern void set_dma_sg(unsigned int chan, struct scatterlist *sg, int nr_sg); */ extern void __set_dma_addr(unsigned int chan, void *addr); #define set_dma_addr(chan, addr) \ - __set_dma_addr(chan, (void *)__bus_to_virt(addr)) + __set_dma_addr(chan, (void *)isa_bus_to_virt(addr)) /* Set the DMA byte count for this channel * |