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Commit 190bd6e9 authored by Masayoshi Mizuma's avatar Masayoshi Mizuma Committed by Borislav Petkov
Browse files

EDAC, sb_edac: Add support for systems with segmented PCI buses 



Extend the driver to check whether segment number and bus number matches
when deciding how to group memory controller PCI devices to CPU sockets.

Signed-off-by: default avatarMasayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: default avatarTony Luck <tony.luck@intel.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20180724190213.26359-1-msys.mizuma@gmail.com


[ Cleanup commit message. ]
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
parent 6663484b

drivers/edac/sb_edac.c

+12 −5
Original line number Diff line number Diff line
@@ -352,6 +352,7 @@ struct pci_id_table { 


struct sbridge_dev {

	struct list_head	list;

	int			seg;

	u8			bus, mc;

	u8			node_id, source_id;

	struct pci_dev		**pdev;
@@ -729,7 +730,8 @@ static inline int numcol(u32 mtr) 
	return 1 << cols;

}



static struct sbridge_dev *get_sbridge_dev(u8 bus, enum domain dom, int multi_bus,

static struct sbridge_dev *get_sbridge_dev(int seg, u8 bus, enum domain dom,

					   int multi_bus,

					   struct sbridge_dev *prev)

{

	struct sbridge_dev *sbridge_dev;
@@ -747,14 +749,15 @@ static struct sbridge_dev *get_sbridge_dev(u8 bus, enum domain dom, int multi_bu 
				      : sbridge_edac_list.next, struct sbridge_dev, list);



	list_for_each_entry_from(sbridge_dev, &sbridge_edac_list, list) {

		if (sbridge_dev->bus == bus && (dom == SOCK || dom == sbridge_dev->dom))

		if ((sbridge_dev->seg == seg) && (sbridge_dev->bus == bus) &&

				(dom == SOCK || dom == sbridge_dev->dom))

			return sbridge_dev;

	}



	return NULL;

}



static struct sbridge_dev *alloc_sbridge_dev(u8 bus, enum domain dom,

static struct sbridge_dev *alloc_sbridge_dev(int seg, u8 bus, enum domain dom,

					     const struct pci_id_table *table)

{

	struct sbridge_dev *sbridge_dev;
@@ -771,6 +774,7 @@ static struct sbridge_dev *alloc_sbridge_dev(u8 bus, enum domain dom, 
		return NULL;

	}



	sbridge_dev->seg = seg;

	sbridge_dev->bus = bus;

	sbridge_dev->dom = dom;

	sbridge_dev->n_devs = table->n_devs_per_imc;
@@ -2246,6 +2250,7 @@ static int sbridge_get_onedevice(struct pci_dev **prev, 
	struct sbridge_dev *sbridge_dev = NULL;

	const struct pci_id_descr *dev_descr = &table->descr[devno];

	struct pci_dev *pdev = NULL;

	int seg = 0;

	u8 bus = 0;

	int i = 0;
@@ -2276,10 +2281,12 @@ static int sbridge_get_onedevice(struct pci_dev **prev, 
		/* End of list, leave */

		return -ENODEV;

	}

	seg = pci_domain_nr(pdev->bus);

	bus = pdev->bus->number;



next_imc:

	sbridge_dev = get_sbridge_dev(bus, dev_descr->dom, multi_bus, sbridge_dev);

	sbridge_dev = get_sbridge_dev(seg, bus, dev_descr->dom,

				      multi_bus, sbridge_dev);

	if (!sbridge_dev) {

		/* If the HA1 wasn't found, don't create EDAC second memory controller */

		if (dev_descr->dom == IMC1 && devno != 1) {
@@ -2292,7 +2299,7 @@ static int sbridge_get_onedevice(struct pci_dev **prev, 
		if (dev_descr->dom == SOCK)

			goto out_imc;



		sbridge_dev = alloc_sbridge_dev(bus, dev_descr->dom, table);

		sbridge_dev = alloc_sbridge_dev(seg, bus, dev_descr->dom, table);

		if (!sbridge_dev) {

			pci_dev_put(pdev);

			return -ENOMEM;