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EDAC, sb_edac: Add support for duplicate device IDs 

Add options to sbridge_get_all_devices() to allow for duplicate device
IDs and devices that are scattered across mulitple PCI buses.

Signed-off-by: Jim Snow <jim.m.snow@intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: lukasz.anaczkowski@intel.com
Link: http://lkml.kernel.org/r/1449136134-23706-4-git-send-email-hubert.chrzaniuk@intel.com
[ Rebase to 4.4-rc3. ]
Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Jim Snow 2015-12-03 10:48:53 +01:00 committed by Borislav Petkov
parent c59f9c06bd
commit c1979ba254
1 changed files with 32 additions and 8 deletions
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38
drivers/edac/sb_edac.c
View File

@ -637,10 +637,19 @@ static inline int numcol(u32 mtr)
return 1 << cols;
}
static struct sbridge_dev *get_sbridge_dev(u8 bus)
static struct sbridge_dev *get_sbridge_dev(u8 bus, int multi_bus)
{
struct sbridge_dev *sbridge_dev;
/*
* If we have devices scattered across several busses that pertain
* to the same memory controller, we'll lump them all together.
*/
if (multi_bus) {
return list_first_entry_or_null(&sbridge_edac_list,
struct sbridge_dev, list);
}
list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) {
if (sbridge_dev->bus == bus)
return sbridge_dev;
@ -1588,7 +1597,8 @@ static void sbridge_put_all_devices(void)
static int sbridge_get_onedevice(struct pci_dev **prev,
u8 *num_mc,
const struct pci_id_table *table,
const unsigned devno)
const unsigned devno,
const int multi_bus)
{
struct sbridge_dev *sbridge_dev;
const struct pci_id_descr *dev_descr = &table->descr[devno];
@ -1624,7 +1634,7 @@ static int sbridge_get_onedevice(struct pci_dev **prev,
}
bus = pdev->bus->number;
sbridge_dev = get_sbridge_dev(bus);
sbridge_dev = get_sbridge_dev(bus, multi_bus);
if (!sbridge_dev) {
sbridge_dev = alloc_sbridge_dev(bus, table);
if (!sbridge_dev) {
@ -1673,21 +1683,32 @@ static int sbridge_get_onedevice(struct pci_dev **prev,
* @num_mc: pointer to the memory controllers count, to be incremented in case
* of success.
* @table: model specific table
* @allow_dups: allow for multiple devices to exist with the same device id
* (as implemented, this isn't expected to work correctly in the
* multi-socket case).
* @multi_bus: don't assume devices on different buses belong to different
* memory controllers.
*
* returns 0 in case of success or error code
*/
static int sbridge_get_all_devices(u8 *num_mc,
const struct pci_id_table *table)
static int sbridge_get_all_devices_full(u8 *num_mc,
const struct pci_id_table *table,
int allow_dups,
int multi_bus)
{
int i, rc;
struct pci_dev *pdev = NULL;
while (table && table->descr) {
for (i = 0; i < table->n_devs; i++) {
if (!allow_dups || i == 0 ||
table->descr[i].dev_id !=
table->descr[i-1].dev_id) {
pdev = NULL;
}
do {
rc = sbridge_get_onedevice(&pdev, num_mc,
table, i);
table, i, multi_bus);
if (rc < 0) {
if (i == 0) {
i = table->n_devs;
@ -1696,7 +1717,7 @@ static int sbridge_get_all_devices(u8 *num_mc,
sbridge_put_all_devices();
return -ENODEV;
}
} while (pdev);
} while (pdev && !allow_dups);
}
table++;
}
@ -1704,6 +1725,9 @@ static int sbridge_get_all_devices(u8 *num_mc,
return 0;
}
#define sbridge_get_all_devices(num_mc, table) \
sbridge_get_all_devices_full(num_mc, table, 0, 0)
static int sbridge_mci_bind_devs(struct mem_ctl_info *mci,
struct sbridge_dev *sbridge_dev)
{