efa21e432c
Currently there are three valid implementations of dma_mapping_error: (1) call ->mapping_error (2) check for a hardcoded error code (3) always return 0 This patch provides a common implementation that calls ->mapping_error if present, then checks for DMA_ERROR_CODE if defined or otherwise returns 0. [jcmvbkbc@gmail.com: fix xtensa] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Michal Simek <monstr@monstr.eu> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#ifndef ___ASM_SPARC_DMA_MAPPING_H
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#define ___ASM_SPARC_DMA_MAPPING_H
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#include <linux/scatterlist.h>
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#include <linux/mm.h>
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#include <linux/dma-debug.h>
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#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
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int dma_supported(struct device *dev, u64 mask);
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static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir)
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{
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/* Since dma_{alloc,free}_noncoherent() allocated coherent memory, this
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* routine can be a nop.
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*/
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}
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extern struct dma_map_ops *dma_ops;
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extern struct dma_map_ops *leon_dma_ops;
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extern struct dma_map_ops pci32_dma_ops;
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extern struct bus_type pci_bus_type;
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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#ifdef CONFIG_SPARC_LEON
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if (sparc_cpu_model == sparc_leon)
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return leon_dma_ops;
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#endif
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#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
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if (dev->bus == &pci_bus_type)
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return &pci32_dma_ops;
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#endif
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return dma_ops;
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}
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#include <asm-generic/dma-mapping-common.h>
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static inline int dma_set_mask(struct device *dev, u64 mask)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type) {
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if (!dev->dma_mask || !dma_supported(dev, mask))
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return -EINVAL;
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*dev->dma_mask = mask;
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return 0;
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}
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#endif
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return -EINVAL;
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}
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#endif
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