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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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738ef42e32
Sometimes this is used to hold a simple offset, and sometimes it is used to hold a pointer. This patch changes it to a union containing void * and dma_addr_t. get/set accessors are also provided, because it was getting a bit ugly to get to the actual data. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
49 lines
947 B
C
49 lines
947 B
C
/*
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* Arch specific extensions to struct device
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*
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* This file is released under the GPLv2
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*/
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#ifndef _ASM_POWERPC_DEVICE_H
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#define _ASM_POWERPC_DEVICE_H
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struct dma_map_ops;
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struct device_node;
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struct dev_archdata {
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/* Optional pointer to an OF device node */
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struct device_node *of_node;
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/* DMA operations on that device */
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struct dma_map_ops *dma_ops;
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/*
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* When an iommu is in use, dma_data is used as a ptr to the base of the
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* iommu_table. Otherwise, it is a simple numerical offset.
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*/
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union {
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dma_addr_t dma_offset;
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void *iommu_table_base;
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} dma_data;
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#ifdef CONFIG_SWIOTLB
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dma_addr_t max_direct_dma_addr;
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#endif
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};
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static inline void dev_archdata_set_node(struct dev_archdata *ad,
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struct device_node *np)
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{
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ad->of_node = np;
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}
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static inline struct device_node *
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dev_archdata_get_node(const struct dev_archdata *ad)
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{
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return ad->of_node;
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}
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struct pdev_archdata {
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};
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#endif /* _ASM_POWERPC_DEVICE_H */
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