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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-12-11 14:48:22 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-12-11 15:43:35 +1100 |
| commit | 837c54db21fc7047af75f3fe4295e32106449e34 (patch) | |
| tree | 911e841e38b9f9899f3a2278abdef41779d77a67 | |
| parent | f276b5ba0d87eba4ce7aace9608d811776734cb5 (diff) | |
| download | lwn-837c54db21fc7047af75f3fe4295e32106449e34.tar.gz lwn-837c54db21fc7047af75f3fe4295e32106449e34.zip | |
[POWERPC] Add of_translate_dma_address
This adds a variant of of_translate_address that uses the dma-ranges
property instead of "ranges", it's to be used by PCI code in parsing
the dma-ranges property.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/kernel/prom_parse.c | 20 | ||||
| -rw-r--r-- | include/asm-powerpc/prom.h | 4 |
2 files changed, 20 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c index 6bdfaf3f99ea..90eb3a3e383e 100644 --- a/arch/powerpc/kernel/prom_parse.c +++ b/arch/powerpc/kernel/prom_parse.c @@ -419,7 +419,7 @@ static struct of_bus *of_match_bus(struct device_node *np) static int of_translate_one(struct device_node *parent, struct of_bus *bus, struct of_bus *pbus, u32 *addr, - int na, int ns, int pna) + int na, int ns, int pna, const char *rprop) { const u32 *ranges; unsigned int rlen; @@ -438,7 +438,7 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus, * to translate addresses that aren't supposed to be translated in * the first place. --BenH. */ - ranges = of_get_property(parent, "ranges", &rlen); + ranges = of_get_property(parent, rprop, &rlen); if (ranges == NULL || rlen == 0) { offset = of_read_number(addr, na); memset(addr, 0, pna * 4); @@ -481,7 +481,8 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus, * that can be mapped to a cpu physical address). This is not really specified * that way, but this is traditionally the way IBM at least do things */ -u64 of_translate_address(struct device_node *dev, const u32 *in_addr) +u64 __of_translate_address(struct device_node *dev, const u32 *in_addr, + const char *rprop) { struct device_node *parent = NULL; struct of_bus *bus, *pbus; @@ -540,7 +541,7 @@ u64 of_translate_address(struct device_node *dev, const u32 *in_addr) pbus->name, pna, pns, parent->full_name); /* Apply bus translation */ - if (of_translate_one(dev, bus, pbus, addr, na, ns, pna)) + if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop)) break; /* Complete the move up one level */ @@ -556,8 +557,19 @@ u64 of_translate_address(struct device_node *dev, const u32 *in_addr) return result; } + +u64 of_translate_address(struct device_node *dev, const u32 *in_addr) +{ + return __of_translate_address(dev, in_addr, "ranges"); +} EXPORT_SYMBOL(of_translate_address); +u64 of_translate_dma_address(struct device_node *dev, const u32 *in_addr) +{ + return __of_translate_address(dev, in_addr, "dma-ranges"); +} +EXPORT_SYMBOL(of_translate_dma_address); + const u32 *of_get_address(struct device_node *dev, int index, u64 *size, unsigned int *flags) { diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h index 925e2d384bb3..78b7b0d494c0 100644 --- a/include/asm-powerpc/prom.h +++ b/include/asm-powerpc/prom.h @@ -202,6 +202,10 @@ static inline unsigned long of_read_ulong(const u32 *cell, int size) */ extern u64 of_translate_address(struct device_node *np, const u32 *addr); +/* Translate a DMA address from device space to CPU space */ +extern u64 of_translate_dma_address(struct device_node *dev, + const u32 *in_addr); + /* Extract an address from a device, returns the region size and * the address space flags too. The PCI version uses a BAR number * instead of an absolute index |