From 68005b67d15a1ee5b5ddff965175728e65fa73e7 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 13 Feb 2019 08:01:30 +0100 Subject: 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 Tested-by: Christian Zigotzky Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/dma.c | 62 ----------------------------------------------- 1 file changed, 62 deletions(-) delete mode 100644 arch/powerpc/kernel/dma.c (limited to 'arch/powerpc/kernel/dma.c') 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* - * 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); - -- cgit v1.2.3