[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:
Linas Vepstas
Paul Mackerras
Родитель
ae65a391ca
Коммит
6937650214
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@ -1,32 +1,31 @@
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/*
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* eeh.c
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* Copyright (C) 2001 Dave Engebretsen & Todd Inglett IBM Corporation
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/bootmem.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/mm.h>
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#include <linux/notifier.h>
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#include <linux/pci.h>
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#include <linux/proc_fs.h>
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#include <linux/rbtree.h>
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#include <linux/seq_file.h>
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#include <linux/spinlock.h>
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#include <asm/atomic.h>
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#include <asm/eeh.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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@ -49,8 +48,8 @@
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* were "empty": all reads return 0xff's and all writes are silently
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* ignored. EEH slot isolation events can be triggered by parity
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* errors on the address or data busses (e.g. during posted writes),
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* which in turn might be caused by dust, vibration, humidity,
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* radioactivity or plain-old failed hardware.
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* which in turn might be caused by low voltage on the bus, dust,
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* vibration, humidity, radioactivity or plain-old failed hardware.
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*
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* Note, however, that one of the leading causes of EEH slot
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* freeze events are buggy device drivers, buggy device microcode,
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@ -256,18 +255,17 @@ static void __pci_addr_cache_insert_device(struct pci_dev *dev)
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dn = pci_device_to_OF_node(dev);
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if (!dn) {
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printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n",
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pci_name(dev));
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printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n", pci_name(dev));
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return;
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}
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/* Skip any devices for which EEH is not enabled. */
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pdn = dn->data;
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pdn = PCI_DN(dn);
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if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
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pdn->eeh_mode & EEH_MODE_NOCHECK) {
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#ifdef DEBUG
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printk(KERN_INFO "PCI: skip building address cache for=%s\n",
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pci_name(dev));
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printk(KERN_INFO "PCI: skip building address cache for=%s - %s\n",
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pci_name(dev), pdn->node->full_name);
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#endif
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return;
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}
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@ -410,16 +408,16 @@ int eeh_unregister_notifier(struct notifier_block *nb)
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* @dn: device node to read
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* @rets: array to return results in
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*/
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static int read_slot_reset_state(struct device_node *dn, int rets[])
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static int read_slot_reset_state(struct pci_dn *pdn, int rets[])
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{
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int token, outputs;
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struct pci_dn *pdn = dn->data;
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if (ibm_read_slot_reset_state2 != RTAS_UNKNOWN_SERVICE) {
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token = ibm_read_slot_reset_state2;
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outputs = 4;
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} else {
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token = ibm_read_slot_reset_state;
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rets[2] = 0; /* fake PE Unavailable info */
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outputs = 3;
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}
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@ -496,7 +494,7 @@ static void eeh_event_handler(void *dummy)
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/**
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* eeh_token_to_phys - convert EEH address token to phys address
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* @token i/o token, should be address in the form 0xE....
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* @token i/o token, should be address in the form 0xA....
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*/
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static inline unsigned long eeh_token_to_phys(unsigned long token)
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{
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@ -522,7 +520,7 @@ static inline unsigned long eeh_token_to_phys(unsigned long token)
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* will query firmware for the EEH status.
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*
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* Returns 0 if there has not been an EEH error; otherwise returns
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* a non-zero value and queues up a solt isolation event notification.
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* a non-zero value and queues up a slot isolation event notification.
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*
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* It is safe to call this routine in an interrupt context.
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*/
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@ -542,7 +540,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
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if (!dn)
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return 0;
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pdn = dn->data;
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pdn = PCI_DN(dn);
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/* Access to IO BARs might get this far and still not want checking. */
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if (!pdn->eeh_capable || !(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
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@ -562,7 +560,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
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atomic_inc(&eeh_fail_count);
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if (atomic_read(&eeh_fail_count) >= EEH_MAX_FAILS) {
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/* re-read the slot reset state */
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if (read_slot_reset_state(dn, rets) != 0)
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if (read_slot_reset_state(pdn, rets) != 0)
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rets[0] = -1; /* reset state unknown */
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eeh_panic(dev, rets[0]);
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}
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@ -576,7 +574,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
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* function zero of a multi-function device.
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* In any case they must share a common PHB.
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*/
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ret = read_slot_reset_state(dn, rets);
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ret = read_slot_reset_state(pdn, rets);
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if (!(ret == 0 && rets[1] == 1 && (rets[0] == 2 || rets[0] == 4))) {
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__get_cpu_var(false_positives)++;
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return 0;
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@ -635,7 +633,6 @@ EXPORT_SYMBOL(eeh_dn_check_failure);
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* @token i/o token, should be address in the form 0xA....
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* @val value, should be all 1's (XXX why do we need this arg??)
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*
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* Check for an eeh failure at the given token address.
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* Check for an EEH failure at the given token address. Call this
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* routine if the result of a read was all 0xff's and you want to
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* find out if this is due to an EEH slot freeze event. This routine
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@ -680,7 +677,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
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u32 *device_id = (u32 *)get_property(dn, "device-id", NULL);
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u32 *regs;
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int enable;
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struct pci_dn *pdn = dn->data;
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struct pci_dn *pdn = PCI_DN(dn);
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pdn->eeh_mode = 0;
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@ -732,7 +729,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
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/* This device doesn't support EEH, but it may have an
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* EEH parent, in which case we mark it as supported. */
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if (dn->parent && dn->parent->data
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if (dn->parent && PCI_DN(dn->parent)
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&& (PCI_DN(dn->parent)->eeh_mode & EEH_MODE_SUPPORTED)) {
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/* Parent supports EEH. */
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pdn->eeh_mode |= EEH_MODE_SUPPORTED;
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@ -745,7 +742,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
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dn->full_name);
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}
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return NULL;
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return NULL;
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}
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/*
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@ -793,13 +790,11 @@ void __init eeh_init(void)
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for (phb = of_find_node_by_name(NULL, "pci"); phb;
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phb = of_find_node_by_name(phb, "pci")) {
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unsigned long buid;
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struct pci_dn *pci;
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buid = get_phb_buid(phb);
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if (buid == 0 || phb->data == NULL)
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if (buid == 0 || PCI_DN(phb) == NULL)
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continue;
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pci = phb->data;
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info.buid_lo = BUID_LO(buid);
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info.buid_hi = BUID_HI(buid);
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traverse_pci_devices(phb, early_enable_eeh, &info);
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@ -828,11 +823,13 @@ void eeh_add_device_early(struct device_node *dn)
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struct pci_controller *phb;
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struct eeh_early_enable_info info;
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if (!dn || !dn->data)
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if (!dn || !PCI_DN(dn))
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return;
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phb = PCI_DN(dn)->phb;
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if (NULL == phb || 0 == phb->buid) {
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printk(KERN_WARNING "EEH: Expected buid but found none\n");
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printk(KERN_WARNING "EEH: Expected buid but found none for %s\n",
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dn->full_name);
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dump_stack();
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return;
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}
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