[PATCH] ppc64: misc minor cleanup
02-eeh-minor-cleanup.patch This patch performs some minor cleanup of the eeh.c file, including: -- trim some trailing whitespace -- remove extraneous #includes -- use the macro PCI_DN uniformly, instead of the void pointer chase. -- typos in comments -- improved debug printk's Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
parent
ae65a391ca
commit
6937650214
|
@ -1,32 +1,31 @@
|
||||||
/*
|
/*
|
||||||
* eeh.c
|
* eeh.c
|
||||||
* Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation
|
* Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation
|
||||||
*
|
*
|
||||||
* This program is free software; you can redistribute it and/or modify
|
* 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
|
* it under the terms of the GNU General Public License as published by
|
||||||
* the Free Software Foundation; either version 2 of the License, or
|
* the Free Software Foundation; either version 2 of the License, or
|
||||||
* (at your option) any later version.
|
* (at your option) any later version.
|
||||||
*
|
*
|
||||||
* This program is distributed in the hope that it will be useful,
|
* This program is distributed in the hope that it will be useful,
|
||||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
* GNU General Public License for more details.
|
* GNU General Public License for more details.
|
||||||
*
|
*
|
||||||
* You should have received a copy of the GNU General Public License
|
* You should have received a copy of the GNU General Public License
|
||||||
* along with this program; if not, write to the Free Software
|
* along with this program; if not, write to the Free Software
|
||||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include <linux/bootmem.h>
|
|
||||||
#include <linux/init.h>
|
#include <linux/init.h>
|
||||||
#include <linux/list.h>
|
#include <linux/list.h>
|
||||||
#include <linux/mm.h>
|
|
||||||
#include <linux/notifier.h>
|
#include <linux/notifier.h>
|
||||||
#include <linux/pci.h>
|
#include <linux/pci.h>
|
||||||
#include <linux/proc_fs.h>
|
#include <linux/proc_fs.h>
|
||||||
#include <linux/rbtree.h>
|
#include <linux/rbtree.h>
|
||||||
#include <linux/seq_file.h>
|
#include <linux/seq_file.h>
|
||||||
#include <linux/spinlock.h>
|
#include <linux/spinlock.h>
|
||||||
|
#include <asm/atomic.h>
|
||||||
#include <asm/eeh.h>
|
#include <asm/eeh.h>
|
||||||
#include <asm/io.h>
|
#include <asm/io.h>
|
||||||
#include <asm/machdep.h>
|
#include <asm/machdep.h>
|
||||||
|
@ -49,8 +48,8 @@
|
||||||
* were "empty": all reads return 0xff's and all writes are silently
|
* were "empty": all reads return 0xff's and all writes are silently
|
||||||
* ignored. EEH slot isolation events can be triggered by parity
|
* ignored. EEH slot isolation events can be triggered by parity
|
||||||
* errors on the address or data busses (e.g. during posted writes),
|
* errors on the address or data busses (e.g. during posted writes),
|
||||||
* which in turn might be caused by dust, vibration, humidity,
|
* which in turn might be caused by low voltage on the bus, dust,
|
||||||
* radioactivity or plain-old failed hardware.
|
* vibration, humidity, radioactivity or plain-old failed hardware.
|
||||||
*
|
*
|
||||||
* Note, however, that one of the leading causes of EEH slot
|
* Note, however, that one of the leading causes of EEH slot
|
||||||
* freeze events are buggy device drivers, buggy device microcode,
|
* freeze events are buggy device drivers, buggy device microcode,
|
||||||
|
@ -256,18 +255,17 @@ static void __pci_addr_cache_insert_device(struct pci_dev *dev)
|
||||||
|
|
||||||
dn = pci_device_to_OF_node(dev);
|
dn = pci_device_to_OF_node(dev);
|
||||||
if (!dn) {
|
if (!dn) {
|
||||||
printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n",
|
printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n", pci_name(dev));
|
||||||
pci_name(dev));
|
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Skip any devices for which EEH is not enabled. */
|
/* Skip any devices for which EEH is not enabled. */
|
||||||
pdn = dn->data;
|
pdn = PCI_DN(dn);
|
||||||
if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
|
if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
|
||||||
pdn->eeh_mode & EEH_MODE_NOCHECK) {
|
pdn->eeh_mode & EEH_MODE_NOCHECK) {
|
||||||
#ifdef DEBUG
|
#ifdef DEBUG
|
||||||
printk(KERN_INFO "PCI: skip building address cache for=%s\n",
|
printk(KERN_INFO "PCI: skip building address cache for=%s - %s\n",
|
||||||
pci_name(dev));
|
pci_name(dev), pdn->node->full_name);
|
||||||
#endif
|
#endif
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
@ -410,16 +408,16 @@ int eeh_unregister_notifier(struct notifier_block *nb)
|
||||||
* @dn: device node to read
|
* @dn: device node to read
|
||||||
* @rets: array to return results in
|
* @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;
|
int token, outputs;
|
||||||
struct pci_dn *pdn = dn->data;
|
|
||||||
|
|
||||||
if (ibm_read_slot_reset_state2 != RTAS_UNKNOWN_SERVICE) {
|
if (ibm_read_slot_reset_state2 != RTAS_UNKNOWN_SERVICE) {
|
||||||
token = ibm_read_slot_reset_state2;
|
token = ibm_read_slot_reset_state2;
|
||||||
outputs = 4;
|
outputs = 4;
|
||||||
} else {
|
} else {
|
||||||
token = ibm_read_slot_reset_state;
|
token = ibm_read_slot_reset_state;
|
||||||
|
rets[2] = 0; /* fake PE Unavailable info */
|
||||||
outputs = 3;
|
outputs = 3;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -496,7 +494,7 @@ static void eeh_event_handler(void *dummy)
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* eeh_token_to_phys - convert EEH address token to phys address
|
* 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)
|
static inline unsigned long eeh_token_to_phys(unsigned long token)
|
||||||
{
|
{
|
||||||
|
@ -522,7 +520,7 @@ static inline unsigned long eeh_token_to_phys(unsigned long token)
|
||||||
* will query firmware for the EEH status.
|
* will query firmware for the EEH status.
|
||||||
*
|
*
|
||||||
* Returns 0 if there has not been an EEH error; otherwise returns
|
* 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.
|
* It is safe to call this routine in an interrupt context.
|
||||||
*/
|
*/
|
||||||
|
@ -542,7 +540,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
|
||||||
|
|
||||||
if (!dn)
|
if (!dn)
|
||||||
return 0;
|
return 0;
|
||||||
pdn = dn->data;
|
pdn = PCI_DN(dn);
|
||||||
|
|
||||||
/* Access to IO BARs might get this far and still not want checking. */
|
/* Access to IO BARs might get this far and still not want checking. */
|
||||||
if (!pdn->eeh_capable || !(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
|
if (!pdn->eeh_capable || !(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
|
||||||
|
@ -562,7 +560,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
|
||||||
atomic_inc(&eeh_fail_count);
|
atomic_inc(&eeh_fail_count);
|
||||||
if (atomic_read(&eeh_fail_count) >= EEH_MAX_FAILS) {
|
if (atomic_read(&eeh_fail_count) >= EEH_MAX_FAILS) {
|
||||||
/* re-read the slot reset state */
|
/* 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 */
|
rets[0] = -1; /* reset state unknown */
|
||||||
eeh_panic(dev, rets[0]);
|
eeh_panic(dev, rets[0]);
|
||||||
}
|
}
|
||||||
|
@ -576,7 +574,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
|
||||||
* function zero of a multi-function device.
|
* function zero of a multi-function device.
|
||||||
* In any case they must share a common PHB.
|
* 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))) {
|
if (!(ret == 0 && rets[1] == 1 && (rets[0] == 2 || rets[0] == 4))) {
|
||||||
__get_cpu_var(false_positives)++;
|
__get_cpu_var(false_positives)++;
|
||||||
return 0;
|
return 0;
|
||||||
|
@ -635,7 +633,6 @@ EXPORT_SYMBOL(eeh_dn_check_failure);
|
||||||
* @token i/o token, should be address in the form 0xA....
|
* @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??)
|
* @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
|
* 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
|
* 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
|
* find out if this is due to an EEH slot freeze event. This routine
|
||||||
|
@ -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 *device_id = (u32 *)get_property(dn, "device-id", NULL);
|
||||||
u32 *regs;
|
u32 *regs;
|
||||||
int enable;
|
int enable;
|
||||||
struct pci_dn *pdn = dn->data;
|
struct pci_dn *pdn = PCI_DN(dn);
|
||||||
|
|
||||||
pdn->eeh_mode = 0;
|
pdn->eeh_mode = 0;
|
||||||
|
|
||||||
|
@ -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
|
/* This device doesn't support EEH, but it may have an
|
||||||
* EEH parent, in which case we mark it as supported. */
|
* 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)) {
|
&& (PCI_DN(dn->parent)->eeh_mode & EEH_MODE_SUPPORTED)) {
|
||||||
/* Parent supports EEH. */
|
/* Parent supports EEH. */
|
||||||
pdn->eeh_mode |= EEH_MODE_SUPPORTED;
|
pdn->eeh_mode |= EEH_MODE_SUPPORTED;
|
||||||
|
@ -745,7 +742,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
|
||||||
dn->full_name);
|
dn->full_name);
|
||||||
}
|
}
|
||||||
|
|
||||||
return NULL;
|
return NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -793,13 +790,11 @@ void __init eeh_init(void)
|
||||||
for (phb = of_find_node_by_name(NULL, "pci"); phb;
|
for (phb = of_find_node_by_name(NULL, "pci"); phb;
|
||||||
phb = of_find_node_by_name(phb, "pci")) {
|
phb = of_find_node_by_name(phb, "pci")) {
|
||||||
unsigned long buid;
|
unsigned long buid;
|
||||||
struct pci_dn *pci;
|
|
||||||
|
|
||||||
buid = get_phb_buid(phb);
|
buid = get_phb_buid(phb);
|
||||||
if (buid == 0 || phb->data == NULL)
|
if (buid == 0 || PCI_DN(phb) == NULL)
|
||||||
continue;
|
continue;
|
||||||
|
|
||||||
pci = phb->data;
|
|
||||||
info.buid_lo = BUID_LO(buid);
|
info.buid_lo = BUID_LO(buid);
|
||||||
info.buid_hi = BUID_HI(buid);
|
info.buid_hi = BUID_HI(buid);
|
||||||
traverse_pci_devices(phb, early_enable_eeh, &info);
|
traverse_pci_devices(phb, early_enable_eeh, &info);
|
||||||
|
@ -828,11 +823,13 @@ void eeh_add_device_early(struct device_node *dn)
|
||||||
struct pci_controller *phb;
|
struct pci_controller *phb;
|
||||||
struct eeh_early_enable_info info;
|
struct eeh_early_enable_info info;
|
||||||
|
|
||||||
if (!dn || !dn->data)
|
if (!dn || !PCI_DN(dn))
|
||||||
return;
|
return;
|
||||||
phb = PCI_DN(dn)->phb;
|
phb = PCI_DN(dn)->phb;
|
||||||
if (NULL == phb || 0 == phb->buid) {
|
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;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Reference in New Issue