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| author | Christoph Hellwig <hch@lst.de> | 2019-02-13 08:01:30 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-02-18 22:41:04 +1100 |
| commit | 68005b67d15a1ee5b5ddff965175728e65fa73e7 (patch) | |
| tree | 7b8a2db46169d2e178cf8f0000592fa8fabfcfaf /arch/powerpc/kernel/dma.c | |
| parent | 461db2bdbf3c978e76dd10a04a63fa06bb29114f (diff) | |
| download | linux-68005b67d15a1ee5b5ddff965175728e65fa73e7.tar.gz | |
powerpc/dma: use the generic direct mapping bypass
Now that we've switched all the powerpc nommu and swiotlb methods to
use the generic dma_direct_* calls we can remove these ops vectors
entirely and rely on the common direct mapping bypass that avoids
indirect function calls entirely. This also allows to remove a whole
lot of boilerplate code related to setting up these operations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/dma.c')
| -rw-r--r-- | arch/powerpc/kernel/dma.c | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c deleted file mode 100644 index b9f7283e7224..000000000000 --- a/arch/powerpc/kernel/dma.c +++ /dev/null @@ -1,62 +0,0 @@ -/* - * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corporation - * - * Provide default implementations of the DMA mapping callbacks for - * directly mapped busses. - */ - -#include <linux/device.h> -#include <linux/dma-direct.h> -#include <linux/dma-debug.h> -#include <linux/gfp.h> -#include <linux/memblock.h> -#include <linux/export.h> -#include <linux/pci.h> -#include <asm/vio.h> -#include <asm/bug.h> -#include <asm/machdep.h> -#include <asm/swiotlb.h> -#include <asm/iommu.h> - -/* - * Generic direct DMA implementation - * - * This implementation supports a per-device offset that can be applied if - * the address at which memory is visible to devices is not 0. Platform code - * can set archdata.dma_data to an unsigned long holding the offset. By - * default the offset is PCI_DRAM_OFFSET. - */ - -const struct dma_map_ops dma_nommu_ops = { -#ifdef CONFIG_NOT_COHERENT_CACHE - .alloc = __dma_nommu_alloc_coherent, - .free = __dma_nommu_free_coherent, -#else - .alloc = dma_direct_alloc, - .free = dma_direct_free, -#endif - .map_sg = dma_direct_map_sg, - .dma_supported = dma_direct_supported, - .map_page = dma_direct_map_page, - .get_required_mask = dma_direct_get_required_mask, -#ifdef CONFIG_NOT_COHERENT_CACHE - .unmap_sg = dma_direct_unmap_sg, - .unmap_page = dma_direct_unmap_page, - .sync_single_for_cpu = dma_direct_sync_single_for_cpu, - .sync_single_for_device = dma_direct_sync_single_for_device, - .sync_sg_for_cpu = dma_direct_sync_sg_for_cpu, - .sync_sg_for_device = dma_direct_sync_sg_for_device, -#endif -}; -EXPORT_SYMBOL(dma_nommu_ops); - -static int __init dma_init(void) -{ -#ifdef CONFIG_IBMVIO - dma_debug_add_bus(&vio_bus_type); -#endif - - return 0; -} -fs_initcall(dma_init); - |