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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-12-20 12:29:03 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-12-20 12:48:50 +0100 |
| commit | d791e51e2db7a6ff12c4f0b191b7cdc57faefa0c (patch) | |
| tree | fd5ef1eb6c8ecd3758770a8f4ccae8a023c0c616 /arch/arm/cpu/mmu.c | |
| parent | ea6e7a4894841d33cbacbbfb15166d1e7c411a7c (diff) | |
| download | barebox-d791e51e2db7a6ff12c4f0b191b7cdc57faefa0c.tar.gz barebox-d791e51e2db7a6ff12c4f0b191b7cdc57faefa0c.tar.xz | |
device: Introduce dma_offset
For devices that do not have a 1:1 mapping between DMA and CPU we need a
dma_offset. This adds dma_offset to struct device_d and starts honoring
it in ARM dma_(un)map_single(). Also we add some comments to functions
that would normally need a device argument to make the DMA <-> CPU
translations device specific.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/cpu/mmu.c')
| -rw-r--r-- | arch/arm/cpu/mmu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c index 158b130b57..1f97c28ec6 100644 --- a/arch/arm/cpu/mmu.c +++ b/arch/arm/cpu/mmu.c @@ -491,6 +491,10 @@ void *dma_alloc_writecombine(size_t size, dma_addr_t *dma_handle) void dma_sync_single_for_device(dma_addr_t address, size_t size, enum dma_data_direction dir) { + /* + * FIXME: This function needs a device argument to support non 1:1 mappings + */ + if (dir == DMA_FROM_DEVICE) { __dma_inv_range(address, address + size); if (outer_cache.inv_range) |