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powerpc/eeh: Replace pci_dn with eeh_dev for EEH address cache 

With original EEH implementation, struct pci_dn is used while building
PCI I/O address cache, which helps on searching the corresponding
PCI device according to the given physical I/O address. Besides, pci_dn
is associated with the corresponding PCI device while building its
I/O cache.

The patch replaces struct pci_dn with struct eeh_dev so that EEH address
cache won't depend on struct pci_dn. That will help EEH to become an
independent module in future. Besides, the binding of eeh_dev and PCI
device is done while building PCI device I/O cache.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
hifive-unleashed-5.1
Gavin Shan 2012-02-27 20:04:06 +00:00 committed by Benjamin Herrenschmidt
parent 44da8edc6a
commit d50a7d4c6f
1 changed files with 20 additions and 7 deletions
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27
arch/powerpc/platforms/pseries/eeh_cache.c
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@ -175,7 +175,7 @@ pci_addr_cache_insert(struct pci_dev *dev, unsigned long alo,
static void __pci_addr_cache_insert_device(struct pci_dev *dev)
{
struct device_node *dn;
struct pci_dn *pdn;
struct eeh_dev *edev;
int i;
dn = pci_device_to_OF_node(dev);
@ -184,13 +184,19 @@ static void __pci_addr_cache_insert_device(struct pci_dev *dev)
return;
}
edev = of_node_to_eeh_dev(dn);
if (!edev) {
pr_warning("PCI: no EEH dev found for dn=%s\n",
dn->full_name);
return;
}
/* Skip any devices for which EEH is not enabled. */
pdn = PCI_DN(dn);
if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
pdn->eeh_mode & EEH_MODE_NOCHECK) {
if (!(edev->mode & EEH_MODE_SUPPORTED) ||
edev->mode & EEH_MODE_NOCHECK) {
#ifdef DEBUG
printk(KERN_INFO "PCI: skip building address cache for=%s - %s\n",
pci_name(dev), pdn->node->full_name);
pr_info("PCI: skip building address cache for=%s - %s\n",
pci_name(dev), dn->full_name);
#endif
return;
}
@ -281,6 +287,7 @@ void pci_addr_cache_remove_device(struct pci_dev *dev)
void __init pci_addr_cache_build(void)
{
struct device_node *dn;
struct eeh_dev *edev;
struct pci_dev *dev = NULL;
spin_lock_init(&pci_io_addr_cache_root.piar_lock);
@ -291,8 +298,14 @@ void __init pci_addr_cache_build(void)
dn = pci_device_to_OF_node(dev);
if (!dn)
continue;
edev = of_node_to_eeh_dev(dn);
if (!edev)
continue;
pci_dev_get(dev); /* matching put is in eeh_remove_device() */
PCI_DN(dn)->pcidev = dev;
dev->dev.archdata.edev = edev;
edev->pdev = dev;
eeh_sysfs_add_device(dev);
}