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/mach-footbridge/include | |
| 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/mach-footbridge/include')
| -rw-r--r-- | arch/arm/mach-footbridge/include/mach/dma-direct.h | 8 | ||||
| -rw-r--r-- | arch/arm/mach-footbridge/include/mach/memory.h | 9 |
2 files changed, 0 insertions, 17 deletions
diff --git a/arch/arm/mach-footbridge/include/mach/dma-direct.h b/arch/arm/mach-footbridge/include/mach/dma-direct.h deleted file mode 100644 index 01f9e8367c00..000000000000 --- a/arch/arm/mach-footbridge/include/mach/dma-direct.h +++ /dev/null @@ -1,8 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef MACH_FOOTBRIDGE_DMA_DIRECT_H -#define MACH_FOOTBRIDGE_DMA_DIRECT_H 1 - -dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); -phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr); - -#endif /* MACH_FOOTBRIDGE_DMA_DIRECT_H */ diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h index 8f0ca8e8b37e..9516877667d7 100644 --- a/arch/arm/mach-footbridge/include/mach/memory.h +++ b/arch/arm/mach-footbridge/include/mach/memory.h @@ -17,15 +17,6 @@ #define __ASM_ARCH_MEMORY_H /* - * The footbridge is programmed to expose the system RAM at 0xe0000000. - * The requirement is that the RAM isn't placed at bus address 0, which - * would clash with VGA cards. - */ -#define BUS_OFFSET 0xe0000000 -#define __virt_to_bus(x) ((x) + (BUS_OFFSET - PAGE_OFFSET)) -#define __bus_to_virt(x) ((x) - (BUS_OFFSET - PAGE_OFFSET)) - -/* * Cache flushing area. */ #define FLUSH_BASE 0xf9000000 |