On Fri, Nov 30, 2012 at 04:44:19PM +0800, Daniel J Blueman wrote:
> Fix locating sibling memory controller PCI functions by using the
> correct PCI domain and use Northbridge only if found. Tested on
> multi-socket server and multi-server, multi-socket NumaConnect setup.
>
> v7: Refactor patches grouping changes
> v8: Restructure searching for PCI function for clarity; use Northbridge
> only if found
>
> Signed-off-by: Daniel J Blueman <dan...@numascale-asia.com>
Ok, looks good. I ended up cleaning it up the code for F15h a bit and
fixing it up. Here's the final version:
--
commit 75cdc74742bbf368dfc52bb5041274c95d85a68f
Author: Daniel J Blueman <dan...@numascale-asia.com>
Date: Fri Nov 30 16:44:19 2012 +0800
amd64_edac: Fix PCI function lookup
Fix locating sibling memory controller PCI functions by using the
correct PCI domain and use a northbridge descriptor only if found. We
need to at least warn if it wasn't found so that it gets fixed and we
don't go off with wrong results.
Signed-off-by: Daniel J Blueman <dan...@numascale-asia.com>
[Boris: remove wrong comment, sanitize code and warn if NB desc lookup
fails]
Signed-off-by: Borislav Petkov <b...@alien8.de>
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 60e93faaea18..e22a35224841 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -983,10 +983,29 @@ static u64 get_error_address(struct mce *m)
return addr;
}
+static struct pci_dev *pci_get_related_function(unsigned int vendor,
+ unsigned int device,
+ struct pci_dev *related)
+{
+ struct pci_dev *dev = NULL;
+
+ while ((dev = pci_get_device(vendor, device, dev))) {
+ if (pci_domain_nr(dev->bus) == pci_domain_nr(related->bus) &&
+ (dev->bus->number == related->bus->number) &&
+ (PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn)))
+ break;
+ }
+
+ return dev;
+}
+
static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
{
+ struct amd_northbridge *nb;
+ struct pci_dev *misc, *f1 = NULL;
struct cpuinfo_x86 *c = &boot_cpu_data;
int off = range << 3;
+ u32 llim;
amd64_read_pci_cfg(pvt->F1, DRAM_BASE_LO + off,
&pvt->ranges[range].base.lo);
amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_LO + off,
&pvt->ranges[range].lim.lo);
@@ -1000,30 +1019,32 @@ static void read_dram_base_limit_regs(struct amd64_pvt
*pvt, unsigned range)
amd64_read_pci_cfg(pvt->F1, DRAM_BASE_HI + off,
&pvt->ranges[range].base.hi);
amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_HI + off,
&pvt->ranges[range].lim.hi);
- /* Factor in CC6 save area by reading dst node's limit reg */
- if (c->x86 == 0x15) {
- struct pci_dev *f1 = NULL;
- u8 nid = dram_dst_node(pvt, range);
- u32 llim;
+ /* F15h: factor in CC6 save area by reading dst node's limit reg */
+ if (c->x86 != 0x15)
+ return;
- f1 = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0x18 + nid,
1));
- if (WARN_ON(!f1))
- return;
+ nb = node_to_amd_nb(dram_dst_node(pvt, range));
+ if (WARN_ON(!nb))
+ return;
- amd64_read_pci_cfg(f1, DRAM_LOCAL_NODE_LIM, &llim);
+ misc = nb->misc;
+ f1 = pci_get_related_function(misc->vendor,
PCI_DEVICE_ID_AMD_15H_NB_F1, misc);
+ if (WARN_ON(!f1))
+ return;
- pvt->ranges[range].lim.lo &= GENMASK(0, 15);
+ amd64_read_pci_cfg(f1, DRAM_LOCAL_NODE_LIM, &llim);
- /* {[39:27],111b} */
- pvt->ranges[range].lim.lo |= ((llim & 0x1fff) << 3 | 0x7) << 16;
+ pvt->ranges[range].lim.lo &= GENMASK(0, 15);
- pvt->ranges[range].lim.hi &= GENMASK(0, 7);
+ /* {[39:27],111b} */
+ pvt->ranges[range].lim.lo |= ((llim & 0x1fff) << 3 | 0x7) << 16;
- /* [47:40] */
- pvt->ranges[range].lim.hi |= llim >> 13;
+ pvt->ranges[range].lim.hi &= GENMASK(0, 7);
- pci_dev_put(f1);
- }
+ /* [47:40] */
+ pvt->ranges[range].lim.hi |= llim >> 13;
+
+ pci_dev_put(f1);
}
static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr,
@@ -1713,23 +1734,6 @@ static struct amd64_family_type amd64_family_types[] = {
},
};
-static struct pci_dev *pci_get_related_function(unsigned int vendor,
- unsigned int device,
- struct pci_dev *related)
-{
- struct pci_dev *dev = NULL;
-
- dev = pci_get_device(vendor, device, dev);
- while (dev) {
- if ((dev->bus->number == related->bus->number) &&
- (PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn)))
- break;
- dev = pci_get_device(vendor, device, dev);
- }
-
- return dev;
-}
-
/*
* These are tables of eigenvectors (one per line) which can be used for the
* construction of the syndrome tables. The modified syndrome search algorithm
--
Regards/Gruss,
Boris.
--
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