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powerpc/eeh: Rename eeh_{add_to|remove_from}_parent_pe()

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The naming of eeh_{add_to|remove_from}_parent_pe() doesn't really reflect
what they actually do. If the PE referred to be edev->pe_config_addr
already exists under that PHB then the edev is added to that PE. However,
if the PE doesn't exist the a new one is created for the edev.

The bulk of the implementation of eeh_add_to_parent_pe() covers that
second case. Similarly, most of eeh_remove_from_parent_pe() is
determining when it's safe to delete a PE.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200725081231.39076-12-oohall@gmail.com
This commit is contained in:
Oliver O'Halloran 2020-07-25 18:12:29 +10:00 committed by Michael Ellerman
parent 768a42845b
commit d923ab7a96
7 changed files with 15 additions and 15 deletions
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4
arch/powerpc/include/asm/eeh.h
View File

@ -283,8 +283,8 @@ struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb);
struct eeh_pe *eeh_pe_next(struct eeh_pe *pe, struct eeh_pe *root);
struct eeh_pe *eeh_pe_get(struct pci_controller *phb,
int pe_no, int config_addr);
int eeh_add_to_parent_pe(struct eeh_dev *edev);
int eeh_rmv_from_parent_pe(struct eeh_dev *edev);
int eeh_pe_tree_insert(struct eeh_dev *edev);
int eeh_pe_tree_remove(struct eeh_dev *edev);
void eeh_pe_update_time_stamp(struct eeh_pe *pe);
void *eeh_pe_traverse(struct eeh_pe *root,
eeh_pe_traverse_func fn, void *flag);

4
arch/powerpc/kernel/eeh.c
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@ -1107,7 +1107,7 @@ void eeh_probe_device(struct pci_dev *dev)
* FIXME: HEY MA, LOOK AT ME, NO LOCKING!
*/
if (edev->pdev && edev->pdev != dev) {
eeh_rmv_from_parent_pe(edev);
eeh_pe_tree_remove(edev);
eeh_addr_cache_rmv_dev(edev->pdev);
eeh_sysfs_remove_device(edev->pdev);
@ -1186,7 +1186,7 @@ void eeh_remove_device(struct pci_dev *dev)
edev->in_error = false;
dev->dev.archdata.edev = NULL;
if (!(edev->pe->state & EEH_PE_KEEP))
eeh_rmv_from_parent_pe(edev);
eeh_pe_tree_remove(edev);
else
edev->mode |= EEH_DEV_DISCONNECTED;
}

2
arch/powerpc/kernel/eeh_driver.c
View File

@ -542,7 +542,7 @@ static void *eeh_pe_detach_dev(struct eeh_pe *pe, void *userdata)
continue;
edev->mode &= ~(EEH_DEV_DISCONNECTED | EEH_DEV_IRQ_DISABLED);
eeh_rmv_from_parent_pe(edev);
eeh_pe_tree_remove(edev);
}
return NULL;

8
arch/powerpc/kernel/eeh_pe.c
View File

@ -356,7 +356,7 @@ static struct eeh_pe *eeh_pe_get_parent(struct eeh_dev *edev)
}
/**
* eeh_add_to_parent_pe - Add EEH device to parent PE
* eeh_pe_tree_insert - Add EEH device to parent PE
* @edev: EEH device
*
* Add EEH device to the parent PE. If the parent PE already
@ -364,7 +364,7 @@ static struct eeh_pe *eeh_pe_get_parent(struct eeh_dev *edev)
* we have to create new PE to hold the EEH device and the new
* PE will be linked to its parent PE as well.
*/
int eeh_add_to_parent_pe(struct eeh_dev *edev)
int eeh_pe_tree_insert(struct eeh_dev *edev)
{
struct eeh_pe *pe, *parent;
struct pci_dn *pdn = eeh_dev_to_pdn(edev);
@ -459,7 +459,7 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
}
/**
* eeh_rmv_from_parent_pe - Remove one EEH device from the associated PE
* eeh_pe_tree_remove - Remove one EEH device from the associated PE
* @edev: EEH device
*
* The PE hierarchy tree might be changed when doing PCI hotplug.
@ -467,7 +467,7 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
* during EEH recovery. So we have to call the function remove the
* corresponding PE accordingly if necessary.
*/
int eeh_rmv_from_parent_pe(struct eeh_dev *edev)
int eeh_pe_tree_remove(struct eeh_dev *edev)
{
struct eeh_pe *pe, *parent, *child;
bool keep, recover;

2
arch/powerpc/kernel/pci_dn.c
View File

@ -263,7 +263,7 @@ void remove_sriov_vf_pdns(struct pci_dev *pdev)
* have a configured PE.
*/
if (edev->pe)
eeh_rmv_from_parent_pe(edev);
eeh_pe_tree_remove(edev);
pdn->edev = NULL;
kfree(edev);

2
arch/powerpc/platforms/powernv/eeh-powernv.c
View File

@ -399,7 +399,7 @@ static struct eeh_dev *pnv_eeh_probe(struct pci_dev *pdev)
edev->pe_config_addr = phb->ioda.pe_rmap[config_addr];
/* Create PE */
ret = eeh_add_to_parent_pe(edev);
ret = eeh_pe_tree_insert(edev);
if (ret) {
eeh_edev_warn(edev, "Failed to add device to PE (code %d)\n", ret);
return NULL;

8
arch/powerpc/platforms/pseries/eeh_pseries.c
View File

@ -72,8 +72,8 @@ void pseries_pcibios_bus_add_device(struct pci_dev *pdev)
struct eeh_dev *edev = pdn_to_eeh_dev(pdn);
edev->pe_config_addr = (pdn->busno << 16) | (pdn->devfn << 8);
eeh_rmv_from_parent_pe(edev); /* Remove as it is adding to bus pe */
eeh_add_to_parent_pe(edev); /* Add as VF PE type */
eeh_pe_tree_remove(edev); /* Remove as it is adding to bus pe */
eeh_pe_tree_insert(edev); /* Add as VF PE type */
}
#endif
eeh_probe_device(pdev);
@ -482,14 +482,14 @@ void pseries_eeh_init_edev(struct pci_dn *pdn)
if (enable) {
eeh_add_flag(EEH_ENABLED);
eeh_add_to_parent_pe(edev);
eeh_pe_tree_insert(edev);
} else if (pdn->parent && pdn_to_eeh_dev(pdn->parent) &&
(pdn_to_eeh_dev(pdn->parent))->pe) {
/* This device doesn't support EEH, but it may have an
* EEH parent, in which case we mark it as supported.
*/
edev->pe_config_addr = pdn_to_eeh_dev(pdn->parent)->pe_config_addr;
eeh_add_to_parent_pe(edev);
eeh_pe_tree_insert(edev);
}
eeh_edev_dbg(edev, "EEH is %s on device (code %d)\n",
(enable ? "enabled" : "unsupported"), ret);