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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2e05ea5cdc
And also switch the way we implement the unmap side around to stay
consistent. This ensures dma-debug works again because it records which
function we used for mapping to ensure it is also used for unmapping,
and also reduces further code duplication. Last but not least this
also officially allows calling dma_sync_single_* for mappings created
using dma_map_page, which is perfectly fine given that the sync calls
only take a dma_addr_t, but not a virtual address or struct page.
Fixes: 7f0fee242e ("dma-mapping: merge dma_unmap_page_attrs and dma_unmap_single_attrs")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: LABBE Corentin <clabbe.montjoie@gmail.com>
179 lines
4.8 KiB
C
179 lines
4.8 KiB
C
/*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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*
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* Author: Joerg Roedel <joerg.roedel@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __DMA_DEBUG_H
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#define __DMA_DEBUG_H
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#include <linux/types.h>
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struct device;
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struct scatterlist;
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struct bus_type;
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#ifdef CONFIG_DMA_API_DEBUG
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extern void dma_debug_add_bus(struct bus_type *bus);
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extern void debug_dma_map_single(struct device *dev, const void *addr,
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unsigned long len);
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extern void debug_dma_map_page(struct device *dev, struct page *page,
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size_t offset, size_t size,
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int direction, dma_addr_t dma_addr);
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extern void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
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extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
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size_t size, int direction);
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extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, int mapped_ents, int direction);
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extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
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int nelems, int dir);
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extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t dma_addr, void *virt);
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extern void debug_dma_free_coherent(struct device *dev, size_t size,
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void *virt, dma_addr_t addr);
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extern void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
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size_t size, int direction,
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dma_addr_t dma_addr);
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extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr,
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size_t size, int direction);
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extern void debug_dma_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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int direction);
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extern void debug_dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle,
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size_t size, int direction);
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extern void debug_dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction);
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extern void debug_dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction);
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extern void debug_dma_dump_mappings(struct device *dev);
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extern void debug_dma_assert_idle(struct page *page);
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#else /* CONFIG_DMA_API_DEBUG */
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static inline void dma_debug_add_bus(struct bus_type *bus)
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{
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}
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static inline void debug_dma_map_single(struct device *dev, const void *addr,
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unsigned long len)
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{
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}
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static inline void debug_dma_map_page(struct device *dev, struct page *page,
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size_t offset, size_t size,
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int direction, dma_addr_t dma_addr)
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{
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}
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static inline void debug_dma_mapping_error(struct device *dev,
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dma_addr_t dma_addr)
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{
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}
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static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
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size_t size, int direction)
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{
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}
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static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, int mapped_ents, int direction)
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{
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}
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static inline void debug_dma_unmap_sg(struct device *dev,
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struct scatterlist *sglist,
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int nelems, int dir)
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{
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}
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static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t dma_addr, void *virt)
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{
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}
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static inline void debug_dma_free_coherent(struct device *dev, size_t size,
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void *virt, dma_addr_t addr)
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{
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}
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static inline void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
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size_t size, int direction,
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dma_addr_t dma_addr)
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{
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}
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static inline void debug_dma_unmap_resource(struct device *dev,
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dma_addr_t dma_addr, size_t size,
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int direction)
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{
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}
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static inline void debug_dma_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle,
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size_t size, int direction)
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{
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}
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static inline void debug_dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle,
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size_t size, int direction)
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{
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}
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static inline void debug_dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction)
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{
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}
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static inline void debug_dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction)
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{
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}
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static inline void debug_dma_dump_mappings(struct device *dev)
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{
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}
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static inline void debug_dma_assert_idle(struct page *page)
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{
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}
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#endif /* CONFIG_DMA_API_DEBUG */
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#endif /* __DMA_DEBUG_H */
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