Count of M64 BAR would differ with the evolution of hardware.
This patch retieves this count from device node instead of a hard coded
value.
Signed-off-by: Wei Yang <weiy...@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
b/arch/powerpc/platforms/powernv/pci-ioda.c
index 5c65d8f..4635d25 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -368,6 +368,7 @@ static void __init pnv_ioda_parse_m64_window(struct pnv_phb
*phb)
struct resource *res;
const u32 *r;
u64 pci_addr;
+ const __be32 *prop32;
/* FIXME: Support M64 for P7IOC */
if (phb->type != PNV_PHB_IODA2) {
@@ -402,7 +403,11 @@ static void __init pnv_ioda_parse_m64_window(struct
pnv_phb *phb)
res->start, res->end, pci_addr);
/* Use last M64 BAR to cover M64 window */
- phb->ioda.m64_bar_idx = 15;
+ prop32 = of_get_property(dn, "ibm,opal-m64-count", NULL);
+ if (prop32)
+ phb->ioda.m64_bar_idx = be32_to_cpup(prop32) - 1;
+ else
+ phb->ioda.m64_bar_idx = 15;
phb->init_m64 = pnv_ioda2_init_m64;
phb->reserve_m64_pe = pnv_ioda2_reserve_m64_pe;
phb->pick_m64_pe = pnv_ioda2_pick_m64_pe;
--
2.5.0
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