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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2007-12-21 15:50:09 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-01-17 14:57:05 +1100 |
| commit | 885b86e4e7ccc360f8ce4d7fb10dfdfb6e3c8650 (patch) | |
| tree | 306b7438cdce8479397ee1ae8c9f244a07f9d9f7 /arch/powerpc/platforms/iseries | |
| parent | b6ed42a794e1ca51fb46ff2bdc562315c46dd9a8 (diff) | |
| download | kernel_samsung_smdk4412-885b86e4e7ccc360f8ce4d7fb10dfdfb6e3c8650.zip kernel_samsung_smdk4412-885b86e4e7ccc360f8ce4d7fb10dfdfb6e3c8650.tar.gz kernel_samsung_smdk4412-885b86e4e7ccc360f8ce4d7fb10dfdfb6e3c8650.tar.bz2 | |
[POWERPC] iSeries: eliminate pci_dn bussubno
xlate_iomm_address() really wants the ds_addr to pass to the HV, so store
that value (instead of the BAR number) when we allocate the device bars.
This is not a fast path, so we can look up the device_node property
there instead of using the bussubno field of the pci_dn.
The other user of iseries_ds_addr() was already scanning the device tree,
so looking up a property will not slow it down any more.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/iseries')
| -rw-r--r-- | arch/powerpc/platforms/iseries/pci.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/iseries/pci.c b/arch/powerpc/platforms/iseries/pci.c index 9319410..cc562e4 100644 --- a/arch/powerpc/platforms/iseries/pci.c +++ b/arch/powerpc/platforms/iseries/pci.c @@ -29,6 +29,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/of.h> #include <asm/types.h> #include <asm/io.h> @@ -70,7 +71,7 @@ static long current_iomm_table_entry; * Lookup Tables. */ static struct device_node *iomm_table[IOMM_TABLE_MAX_ENTRIES]; -static u8 iobar_table[IOMM_TABLE_MAX_ENTRIES]; +static u64 ds_addr_table[IOMM_TABLE_MAX_ENTRIES]; static DEFINE_SPINLOCK(iomm_table_lock); @@ -80,8 +81,9 @@ static DEFINE_SPINLOCK(iomm_table_lock); static inline u64 iseries_ds_addr(struct device_node *node) { struct pci_dn *pdn = PCI_DN(node); + const u32 *sbp = of_get_property(node, "linux,subbus", NULL); - return ((u64)pdn->busno << 48) + ((u64)pdn->bussubno << 40) + return ((u64)pdn->busno << 48) + ((u64)(sbp ? *sbp : 0) << 40) + ((u64)0x10 << 32); } @@ -333,7 +335,8 @@ static void __init iomm_table_allocate_entry(struct pci_dev *dev, int bar_num) */ while (bar_size > 0 ) { iomm_table[current_iomm_table_entry] = dev->sysdata; - iobar_table[current_iomm_table_entry] = bar_num; + ds_addr_table[current_iomm_table_entry] = + iseries_ds_addr(dev->sysdata) | (bar_num << 24); bar_size -= IOMM_TABLE_ENTRY_SIZE; ++current_iomm_table_entry; } @@ -598,8 +601,7 @@ static inline struct device_node *xlate_iomm_address( dn = iomm_table[ind]; if (dn != NULL) { - int barnum = iobar_table[ind]; - *dsaptr = iseries_ds_addr(dn) | (barnum << 24); + *dsaptr = ds_addr_table[ind]; *bar_offset = base_addr % IOMM_TABLE_ENTRY_SIZE; } else panic("PCI: Invalid PCI IO address detected!\n"); |