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yaml
---
r: 13703
b: refs/heads/master
c: 6937650
h: refs/heads/master
i:
  13701: d9b4377
  13699: a746a1d
  13695: 38637e5
v: v3
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Linas Vepstas authored and Paul Mackerras committed Nov 10, 2005
1 parent f489360 commit 65adaf1
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Showing 2 changed files with 26 additions and 29 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: ae65a391caf1830aea9e4cadd69bb1aa69aad492
refs/heads/master: 693765021460f19c5d7c638eb76e2efe1cd84752
53 changes: 25 additions & 28 deletions trunk/arch/ppc64/kernel/eeh.c
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Original file line number Diff line number Diff line change
@@ -1,32 +1,31 @@
/*
* eeh.c
* Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#include <linux/bootmem.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/notifier.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/rbtree.h>
#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <asm/atomic.h>
#include <asm/eeh.h>
#include <asm/io.h>
#include <asm/machdep.h>
Expand All @@ -49,8 +48,8 @@
* were "empty": all reads return 0xff's and all writes are silently
* ignored. EEH slot isolation events can be triggered by parity
* errors on the address or data busses (e.g. during posted writes),
* which in turn might be caused by dust, vibration, humidity,
* radioactivity or plain-old failed hardware.
* which in turn might be caused by low voltage on the bus, dust,
* vibration, humidity, radioactivity or plain-old failed hardware.
*
* Note, however, that one of the leading causes of EEH slot
* freeze events are buggy device drivers, buggy device microcode,
Expand Down Expand Up @@ -256,18 +255,17 @@ static void __pci_addr_cache_insert_device(struct pci_dev *dev)

dn = pci_device_to_OF_node(dev);
if (!dn) {
printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n",
pci_name(dev));
printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n", pci_name(dev));
return;
}

/* Skip any devices for which EEH is not enabled. */
pdn = dn->data;
pdn = PCI_DN(dn);
if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
pdn->eeh_mode & EEH_MODE_NOCHECK) {
#ifdef DEBUG
printk(KERN_INFO "PCI: skip building address cache for=%s\n",
pci_name(dev));
printk(KERN_INFO "PCI: skip building address cache for=%s - %s\n",
pci_name(dev), pdn->node->full_name);
#endif
return;
}
Expand Down Expand Up @@ -410,16 +408,16 @@ int eeh_unregister_notifier(struct notifier_block *nb)
* @dn: device node to read
* @rets: array to return results in
*/
static int read_slot_reset_state(struct device_node *dn, int rets[])
static int read_slot_reset_state(struct pci_dn *pdn, int rets[])
{
int token, outputs;
struct pci_dn *pdn = dn->data;

if (ibm_read_slot_reset_state2 != RTAS_UNKNOWN_SERVICE) {
token = ibm_read_slot_reset_state2;
outputs = 4;
} else {
token = ibm_read_slot_reset_state;
rets[2] = 0; /* fake PE Unavailable info */
outputs = 3;
}

Expand Down Expand Up @@ -496,7 +494,7 @@ static void eeh_event_handler(void *dummy)

/**
* eeh_token_to_phys - convert EEH address token to phys address
* @token i/o token, should be address in the form 0xE....
* @token i/o token, should be address in the form 0xA....
*/
static inline unsigned long eeh_token_to_phys(unsigned long token)
{
Expand All @@ -522,7 +520,7 @@ static inline unsigned long eeh_token_to_phys(unsigned long token)
* will query firmware for the EEH status.
*
* Returns 0 if there has not been an EEH error; otherwise returns
* a non-zero value and queues up a solt isolation event notification.
* a non-zero value and queues up a slot isolation event notification.
*
* It is safe to call this routine in an interrupt context.
*/
Expand All @@ -542,7 +540,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)

if (!dn)
return 0;
pdn = dn->data;
pdn = PCI_DN(dn);

/* Access to IO BARs might get this far and still not want checking. */
if (!pdn->eeh_capable || !(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
Expand All @@ -562,7 +560,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
atomic_inc(&eeh_fail_count);
if (atomic_read(&eeh_fail_count) >= EEH_MAX_FAILS) {
/* re-read the slot reset state */
if (read_slot_reset_state(dn, rets) != 0)
if (read_slot_reset_state(pdn, rets) != 0)
rets[0] = -1; /* reset state unknown */
eeh_panic(dev, rets[0]);
}
Expand All @@ -576,7 +574,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
* function zero of a multi-function device.
* In any case they must share a common PHB.
*/
ret = read_slot_reset_state(dn, rets);
ret = read_slot_reset_state(pdn, rets);
if (!(ret == 0 && rets[1] == 1 && (rets[0] == 2 || rets[0] == 4))) {
__get_cpu_var(false_positives)++;
return 0;
Expand Down Expand Up @@ -635,7 +633,6 @@ EXPORT_SYMBOL(eeh_dn_check_failure);
* @token i/o token, should be address in the form 0xA....
* @val value, should be all 1's (XXX why do we need this arg??)
*
* Check for an eeh failure at the given token address.
* Check for an EEH failure at the given token address. Call this
* routine if the result of a read was all 0xff's and you want to
* find out if this is due to an EEH slot freeze event. This routine
Expand Down Expand Up @@ -680,7 +677,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
u32 *device_id = (u32 *)get_property(dn, "device-id", NULL);
u32 *regs;
int enable;
struct pci_dn *pdn = dn->data;
struct pci_dn *pdn = PCI_DN(dn);

pdn->eeh_mode = 0;

Expand Down Expand Up @@ -732,7 +729,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data)

/* This device doesn't support EEH, but it may have an
* EEH parent, in which case we mark it as supported. */
if (dn->parent && dn->parent->data
if (dn->parent && PCI_DN(dn->parent)
&& (PCI_DN(dn->parent)->eeh_mode & EEH_MODE_SUPPORTED)) {
/* Parent supports EEH. */
pdn->eeh_mode |= EEH_MODE_SUPPORTED;
Expand All @@ -745,7 +742,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
dn->full_name);
}

return NULL;
return NULL;
}

/*
Expand Down Expand Up @@ -793,13 +790,11 @@ void __init eeh_init(void)
for (phb = of_find_node_by_name(NULL, "pci"); phb;
phb = of_find_node_by_name(phb, "pci")) {
unsigned long buid;
struct pci_dn *pci;

buid = get_phb_buid(phb);
if (buid == 0 || phb->data == NULL)
if (buid == 0 || PCI_DN(phb) == NULL)
continue;

pci = phb->data;
info.buid_lo = BUID_LO(buid);
info.buid_hi = BUID_HI(buid);
traverse_pci_devices(phb, early_enable_eeh, &info);
Expand Down Expand Up @@ -828,11 +823,13 @@ void eeh_add_device_early(struct device_node *dn)
struct pci_controller *phb;
struct eeh_early_enable_info info;

if (!dn || !dn->data)
if (!dn || !PCI_DN(dn))
return;
phb = PCI_DN(dn)->phb;
if (NULL == phb || 0 == phb->buid) {
printk(KERN_WARNING "EEH: Expected buid but found none\n");
printk(KERN_WARNING "EEH: Expected buid but found none for %s\n",
dn->full_name);
dump_stack();
return;
}

Expand Down

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