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EDAC, skx_edac: Handle systems with segmented PCI busses

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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>
This commit is contained in:
Tony Luck 2017-09-25 10:10:42 -07:00 committed by Borislav Petkov
parent f821fe8cc7
commit 88ae80aa60
1 changed files with 5 additions and 3 deletions
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8
drivers/edac/skx_edac.c
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@ -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;