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authorTony Luck <tony.luck@intel.com>2017-09-25 10:10:42 -0700
committerBorislav Petkov <bp@suse.de>2017-09-28 18:01:55 +0200
commit88ae80aa609c7db3e3cc98e97e05badbcc6347dc (patch)
treece8c59860eb3d3be14cc3e081a9d170f1a80b725 /drivers/edac
parentf821fe8cc7e51b238585e71b688e7093bfec355c (diff)
downloadlinux-88ae80aa609c7db3e3cc98e97e05badbcc6347dc.tar.bz2
EDAC, skx_edac: Handle systems with segmented PCI busses
Large systems separate their PCI busses into segments since the limit of only 256 PCI busses can be too restrictive. Extend this driver to check whether <segment, bus-number> matches when deciding how to group memory controller PCI devices to CPU sockets. Signed-off-by: Tony Luck <tony.luck@intel.com> Cc: Aristeu Rozanski <arozansk@redhat.com> Cc: Charles Rose <charles.rose@dell.com> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/f58abfd10bf73c8bc5adc1fe4de7408128b00625.1506358467.git.tony.luck@intel.com [ Make skx_dev.seg an int. ] Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/skx_edac.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/edac/skx_edac.c b/drivers/edac/skx_edac.c
index 9ca40a3fe03f..912c4930c9ef 100644
--- a/drivers/edac/skx_edac.c
+++ b/drivers/edac/skx_edac.c
@@ -67,6 +67,7 @@ static u64 skx_tolm, skx_tohm;
struct skx_dev {
struct list_head list;
u8 bus[4];
+ int seg;
struct pci_dev *sad_all;
struct pci_dev *util_all;
u32 mcroute;
@@ -112,12 +113,12 @@ struct decoded_addr {
int bank_group;
};
-static struct skx_dev *get_skx_dev(u8 bus, u8 idx)
+static struct skx_dev *get_skx_dev(struct pci_bus *bus, u8 idx)
{
struct skx_dev *d;
list_for_each_entry(d, &skx_edac_list, list) {
- if (d->bus[idx] == bus)
+ if (d->seg == pci_domain_nr(bus) && d->bus[idx] == bus->number)
return d;
}
@@ -174,6 +175,7 @@ static int get_all_bus_mappings(void)
pci_dev_put(pdev);
return -ENOMEM;
}
+ d->seg = pci_domain_nr(pdev->bus);
pci_read_config_dword(pdev, 0xCC, &reg);
d->bus[0] = GET_BITFIELD(reg, 0, 7);
d->bus[1] = GET_BITFIELD(reg, 8, 15);
@@ -209,7 +211,7 @@ static int get_all_munits(const struct munit *m)
if (i == NUM_IMC)
goto fail;
}
- d = get_skx_dev(pdev->bus->number, m->busidx);
+ d = get_skx_dev(pdev->bus, m->busidx);
if (!d)
goto fail;