diff options
| -rw-r--r-- | drivers/of/address.c | 67 | ||||
| -rw-r--r-- | drivers/of/of_pci.c | 59 | ||||
| -rw-r--r-- | include/linux/of_address.h | 48 | ||||
| -rw-r--r-- | include/linux/of_pci.h | 2 |
4 files changed, 171 insertions, 5 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index 04da786c84d2..fdd0636a987d 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -227,6 +227,73 @@ int of_pci_address_to_resource(struct device_node *dev, int bar, return __of_address_to_resource(dev, addrp, size, flags, NULL, r); } EXPORT_SYMBOL_GPL(of_pci_address_to_resource); + +int of_pci_range_parser_init(struct of_pci_range_parser *parser, + struct device_node *node) +{ + const int na = 3, ns = 2; + int rlen; + + parser->node = node; + parser->pna = of_n_addr_cells(node); + parser->np = parser->pna + na + ns; + + parser->range = of_get_property(node, "ranges", &rlen); + if (parser->range == NULL) + return -ENOENT; + + parser->end = parser->range + rlen / sizeof(__be32); + + return 0; +} +EXPORT_SYMBOL_GPL(of_pci_range_parser_init); + +struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser, + struct of_pci_range *range) +{ + const int na = 3, ns = 2; + + if (!range) + return NULL; + + if (!parser->range || parser->range + parser->np > parser->end) + return NULL; + + range->pci_space = parser->range[0]; + range->flags = of_bus_pci_get_flags(parser->range); + range->pci_addr = of_read_number(parser->range + 1, ns); + range->cpu_addr = of_translate_address(parser->node, + parser->range + na); + range->size = of_read_number(parser->range + parser->pna + na, ns); + + parser->range += parser->np; + + /* Now consume following elements while they are contiguous */ + while (parser->range + parser->np <= parser->end) { + u32 flags, pci_space; + u64 pci_addr, cpu_addr, size; + + pci_space = be32_to_cpup(parser->range); + flags = of_bus_pci_get_flags(parser->range); + pci_addr = of_read_number(parser->range + 1, ns); + cpu_addr = of_translate_address(parser->node, + parser->range + na); + size = of_read_number(parser->range + parser->pna + na, ns); + + if (flags != range->flags) + break; + if (pci_addr != range->pci_addr + range->size || + cpu_addr != range->cpu_addr + range->size) + break; + + range->size += size; + parser->range += parser->np; + } + + return range; +} +EXPORT_SYMBOL_GPL(of_pci_range_parser_one); + #endif /* CONFIG_PCI */ /* diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index 13e37e2d8ec1..42c687a820ac 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -5,14 +5,15 @@ #include <asm/prom.h> static inline int __of_pci_pci_compare(struct device_node *node, - unsigned int devfn) + unsigned int data) { - unsigned int size; - const __be32 *reg = of_get_property(node, "reg", &size); + int devfn; - if (!reg || size < 5 * sizeof(__be32)) + devfn = of_pci_get_devfn(node); + if (devfn < 0) return 0; - return ((be32_to_cpup(®[0]) >> 8) & 0xff) == devfn; + + return devfn == data; } struct device_node *of_pci_find_child_device(struct device_node *parent, @@ -40,3 +41,51 @@ struct device_node *of_pci_find_child_device(struct device_node *parent, return NULL; } EXPORT_SYMBOL_GPL(of_pci_find_child_device); + +/** + * of_pci_get_devfn() - Get device and function numbers for a device node + * @np: device node + * + * Parses a standard 5-cell PCI resource and returns an 8-bit value that can + * be passed to the PCI_SLOT() and PCI_FUNC() macros to extract the device + * and function numbers respectively. On error a negative error code is + * returned. + */ +int of_pci_get_devfn(struct device_node *np) +{ + unsigned int size; + const __be32 *reg; + + reg = of_get_property(np, "reg", &size); + + if (!reg || size < 5 * sizeof(__be32)) + return -EINVAL; + + return (be32_to_cpup(reg) >> 8) & 0xff; +} +EXPORT_SYMBOL_GPL(of_pci_get_devfn); + +/** + * of_pci_parse_bus_range() - parse the bus-range property of a PCI device + * @node: device node + * @res: address to a struct resource to return the bus-range + * + * Returns 0 on success or a negative error-code on failure. + */ +int of_pci_parse_bus_range(struct device_node *node, struct resource *res) +{ + const __be32 *values; + int len; + + values = of_get_property(node, "bus-range", &len); + if (!values || len < sizeof(*values) * 2) + return -EINVAL; + + res->name = node->name; + res->start = be32_to_cpup(values++); + res->end = be32_to_cpup(values); + res->flags = IORESOURCE_BUS; + + return 0; +} +EXPORT_SYMBOL_GPL(of_pci_parse_bus_range); diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 0506eb53519b..4c2e6f26432c 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -4,6 +4,36 @@ #include <linux/errno.h> #include <linux/of.h> +struct of_pci_range_parser { + struct device_node *node; + const __be32 *range; + const __be32 *end; + int np; + int pna; +}; + +struct of_pci_range { + u32 pci_space; + u64 pci_addr; + u64 cpu_addr; + u64 size; + u32 flags; +}; + +#define for_each_of_pci_range(parser, range) \ + for (; of_pci_range_parser_one(parser, range);) + +static inline void of_pci_range_to_resource(struct of_pci_range *range, + struct device_node *np, + struct resource *res) +{ + res->flags = range->flags; + res->start = range->cpu_addr; + res->end = range->cpu_addr + range->size - 1; + res->parent = res->child = res->sibling = NULL; + res->name = np->full_name; +} + #ifdef CONFIG_OF_ADDRESS extern u64 of_translate_address(struct device_node *np, const __be32 *addr); extern bool of_can_translate_address(struct device_node *dev); @@ -27,6 +57,11 @@ static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; } #define pci_address_to_pio pci_address_to_pio #endif +extern int of_pci_range_parser_init(struct of_pci_range_parser *parser, + struct device_node *node); +extern struct of_pci_range *of_pci_range_parser_one( + struct of_pci_range_parser *parser, + struct of_pci_range *range); #else /* CONFIG_OF_ADDRESS */ #ifndef of_address_to_resource static inline int of_address_to_resource(struct device_node *dev, int index, @@ -53,6 +88,19 @@ static inline const __be32 *of_get_address(struct device_node *dev, int index, { return NULL; } + +static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser, + struct device_node *node) +{ + return -1; +} + +static inline struct of_pci_range *of_pci_range_parser_one( + struct of_pci_range_parser *parser, + struct of_pci_range *range) +{ + return NULL; +} #endif /* CONFIG_OF_ADDRESS */ diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h index bb115deb7612..7a04826018c0 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -10,5 +10,7 @@ int of_irq_map_pci(const struct pci_dev *pdev, struct of_irq *out_irq); struct device_node; struct device_node *of_pci_find_child_device(struct device_node *parent, unsigned int devfn); +int of_pci_get_devfn(struct device_node *np); +int of_pci_parse_bus_range(struct device_node *node, struct resource *res); #endif |