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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 12:06:52 +07:00
645c138636
of_pci_range_parser_one() has a bug when parsing dma-ranges. When it translates the parent address (aka cpu address in the code), 'ranges' is always being used. This happens to work because most users are just 1:1 translation. Cc: Robin Murphy <robin.murphy@arm.com> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Signed-off-by: Rob Herring <robh@kernel.org>
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __OF_ADDRESS_H
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#define __OF_ADDRESS_H
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include <linux/of.h>
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#include <linux/io.h>
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struct of_pci_range_parser {
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struct device_node *node;
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const __be32 *range;
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const __be32 *end;
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int np;
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int pna;
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bool dma;
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};
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struct of_pci_range {
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u32 pci_space;
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u64 pci_addr;
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u64 cpu_addr;
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u64 size;
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u32 flags;
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};
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#define for_each_of_pci_range(parser, range) \
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for (; of_pci_range_parser_one(parser, range);)
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/* Translate a DMA address from device space to CPU space */
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extern u64 of_translate_dma_address(struct device_node *dev,
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const __be32 *in_addr);
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#ifdef CONFIG_OF_ADDRESS
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extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
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extern int of_address_to_resource(struct device_node *dev, int index,
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struct resource *r);
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extern void __iomem *of_iomap(struct device_node *device, int index);
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void __iomem *of_io_request_and_map(struct device_node *device,
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int index, const char *name);
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/* Extract an address from a device, returns the region size and
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* the address space flags too. The PCI version uses a BAR number
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* instead of an absolute index
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*/
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extern const __be32 *of_get_address(struct device_node *dev, int index,
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u64 *size, unsigned int *flags);
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extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
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struct device_node *node);
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extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
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struct device_node *node);
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extern struct of_pci_range *of_pci_range_parser_one(
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struct of_pci_range_parser *parser,
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struct of_pci_range *range);
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extern bool of_dma_is_coherent(struct device_node *np);
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#else /* CONFIG_OF_ADDRESS */
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static inline void __iomem *of_io_request_and_map(struct device_node *device,
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int index, const char *name)
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{
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return IOMEM_ERR_PTR(-EINVAL);
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}
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static inline u64 of_translate_address(struct device_node *np,
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const __be32 *addr)
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{
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return OF_BAD_ADDR;
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}
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static inline const __be32 *of_get_address(struct device_node *dev, int index,
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u64 *size, unsigned int *flags)
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{
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return NULL;
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}
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static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
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struct device_node *node)
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{
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return -ENOSYS;
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}
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static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
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struct device_node *node)
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{
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return -ENOSYS;
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}
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static inline struct of_pci_range *of_pci_range_parser_one(
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struct of_pci_range_parser *parser,
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struct of_pci_range *range)
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{
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return NULL;
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}
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static inline bool of_dma_is_coherent(struct device_node *np)
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{
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return false;
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}
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#endif /* CONFIG_OF_ADDRESS */
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#ifdef CONFIG_OF
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extern int of_address_to_resource(struct device_node *dev, int index,
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struct resource *r);
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void __iomem *of_iomap(struct device_node *node, int index);
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#else
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static inline int of_address_to_resource(struct device_node *dev, int index,
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struct resource *r)
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{
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return -EINVAL;
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}
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static inline void __iomem *of_iomap(struct device_node *device, int index)
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{
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return NULL;
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}
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#endif
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#if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
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extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
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u64 *size, unsigned int *flags);
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extern int of_pci_address_to_resource(struct device_node *dev, int bar,
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struct resource *r);
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extern int of_pci_range_to_resource(struct of_pci_range *range,
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struct device_node *np,
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struct resource *res);
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#else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
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static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
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struct resource *r)
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{
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return -ENOSYS;
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}
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static inline const __be32 *of_get_pci_address(struct device_node *dev,
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int bar_no, u64 *size, unsigned int *flags)
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{
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return NULL;
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}
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static inline int of_pci_range_to_resource(struct of_pci_range *range,
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struct device_node *np,
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struct resource *res)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */
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#endif /* __OF_ADDRESS_H */
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