diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0004-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0004-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/target/linux/mvebu/patches-3.10/0004-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch b/target/linux/mvebu/patches-3.10/0004-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch deleted file mode 100644 index 70ccd60..0000000 --- a/target/linux/mvebu/patches-3.10/0004-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch +++ /dev/null @@ -1,196 +0,0 @@ -From 7d375772a601bdf227902454705e402fc65b8bdf Mon Sep 17 00:00:00 2001 -From: Andrew Murray <Andrew.Murray@arm.com> -Date: Tue, 7 May 2013 16:31:12 +0100 -Subject: [PATCH 004/203] of/pci: Provide support for parsing PCI DT ranges - property - -This patch factors out common implementation patterns to reduce overall kernel -code and provide a means for host bridge drivers to directly obtain struct -resources from the DT's ranges property without relying on architecture specific -DT handling. This will make it easier to write archiecture independent host bridge -drivers and mitigate against further duplication of DT parsing code. - -This patch can be used in the following way: - - struct of_pci_range_parser parser; - struct of_pci_range range; - - if (of_pci_range_parser_init(&parser, np)) - ; //no ranges property - - for_each_of_pci_range(&parser, &range) { - - /* - directly access properties of the address range, e.g.: - range.pci_space, range.pci_addr, range.cpu_addr, - range.size, range.flags - - alternatively obtain a struct resource, e.g.: - struct resource res; - of_pci_range_to_resource(&range, np, &res); - */ - } - -Additionally the implementation takes care of adjacent ranges and merges them -into a single range (as was the case with powerpc and microblaze). - -Signed-off-by: Andrew Murray <Andrew.Murray@arm.com> -Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com> -Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> -Reviewed-by: Rob Herring <rob.herring@calxeda.com> -Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> -Tested-by: Linus Walleij <linus.walleij@linaro.org> -Tested-by: Jingoo Han <jg1.han@samsung.com> -Acked-by: Grant Likely <grant.likely@secretlab.ca> ---- - drivers/of/address.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++ - include/linux/of_address.h | 48 +++++++++++++++++++++++++++++++++ - 2 files changed, 115 insertions(+) - ---- a/drivers/of/address.c -+++ b/drivers/of/address.c -@@ -224,6 +224,73 @@ int of_pci_address_to_resource(struct de - 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 */ - - /* ---- 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_ - #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_addre - { - 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 */ - - |