On Wed, 5 Mar 2014 11:48:53 +0000, Liviu Dudau Liviu.Dudau@arm.com wrote:
The ranges property for a host bridge controller in DT describes the mapping between the PCI bus address and the CPU physical address. The resources framework however expects that the IO resources start at a pseudo "port" address 0 (zero) and have a maximum size of IO_SPACE_LIMIT. The conversion from pci ranges to resources failed to take that into account.
In the process move the function into drivers/of/address.c as it now depends on pci_address_to_pio() code.
Signed-off-by: Liviu Dudau Liviu.Dudau@arm.com Tested-by: Tanmay Inamdar tinamdar@apm.com
I think this is okay, but I'll need an ack from Arnd or Ben.
g.
drivers/of/address.c | 34 ++++++++++++++++++++++++++++++++++ include/linux/of_address.h | 13 ++----------- 2 files changed, 36 insertions(+), 11 deletions(-)
diff --git a/drivers/of/address.c b/drivers/of/address.c index d1bb30f..d595d98 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -724,3 +724,37 @@ void __iomem *of_iomap(struct device_node *np, int index) return ioremap(res.start, resource_size(&res)); } EXPORT_SYMBOL(of_iomap);
+/**
- of_pci_range_to_resource - Create a resource from an of_pci_range
- @range: the PCI range that describes the resource
- @np: device node where the range belongs to
- @res: pointer to a valid resource that will be updated to
reflect the values contained in the range.
- Note that if the range is an IO range, the resource will be converted
- using pci_address_to_pio() which can fail if it is called too early or
- if the range cannot be matched to any host bridge IO space (our case here).
- To guard against that we try to register the IO range first.
- If that fails we know that pci_address_to_pio() will do too.
- */
+void of_pci_range_to_resource(struct of_pci_range *range,
- struct device_node *np, struct resource *res)
+{
- res->flags = range->flags;
- if (res->flags & IORESOURCE_IO) {
unsigned long port = -1;if (!pci_register_io_range(range->cpu_addr, range->size))port = pci_address_to_pio(range->cpu_addr);if (port == (unsigned long)-1) {res->start = (resource_size_t)OF_BAD_ADDR;res->end = (resource_size_t)OF_BAD_ADDR;return;}res->start = port;- } else {
res->start = range->cpu_addr;- }
- res->end = res->start + range->size - 1;
- res->parent = res->child = res->sibling = NULL;
- res->name = np->full_name;
+} diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 40c418d..3fe500a 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -23,17 +23,8 @@ struct of_pci_range { #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;
-}
+extern void of_pci_range_to_resource(struct of_pci_range *range,
struct device_node *np, struct resource *res);/* Translate a DMA address from device space to CPU space */ extern u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr); -- 1.9.0
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