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author | Richard A Lary <rlary@linux.vnet.ibm.com> | 2011-04-22 09:59:47 (GMT) |
---|---|---|
committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-04 06:02:36 (GMT) |
commit | 308fc4f8e10b5239cde46104bb9fca79b46230c8 (patch) | |
tree | 34b0db6cf863af99453094a922c071c44b46450e /arch/powerpc/platforms/pseries | |
parent | 9ee820fa005254dfc816330f6654f14dcb2beee1 (diff) | |
download | linux-308fc4f8e10b5239cde46104bb9fca79b46230c8.tar.xz |
powerpc/pseries/eeh: Propagate needs_freset flag to device at PE
For multifunction adapters with a PCI bridge or switch as the device
at the Partitionable Endpoint(PE), if one or more devices below PE
sets dev->needs_freset, that value will be set for the PE device.
In other words, if any device below PE requires a fundamental reset
the PE will request a fundamental reset.
Signed-off-by: Richard A Lary <rlary@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries')
-rw-r--r-- | arch/powerpc/platforms/pseries/eeh.c | 50 |
1 files changed, 43 insertions, 7 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 22937305..6cb3e7bd 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -451,6 +451,39 @@ void eeh_clear_slot (struct device_node *dn, int mode_flag) raw_spin_unlock_irqrestore(&confirm_error_lock, flags); } +void __eeh_set_pe_freset(struct device_node *parent, unsigned int *freset) +{ + struct device_node *dn; + + for_each_child_of_node(parent, dn) { + if (PCI_DN(dn)) { + + struct pci_dev *dev = PCI_DN(dn)->pcidev; + + if (dev && dev->driver) + *freset |= dev->needs_freset; + + __eeh_set_pe_freset(dn, freset); + } + } +} + +void eeh_set_pe_freset(struct device_node *dn, unsigned int *freset) +{ + struct pci_dev *dev; + dn = find_device_pe(dn); + + /* Back up one, since config addrs might be shared */ + if (!pcibios_find_pci_bus(dn) && PCI_DN(dn->parent)) + dn = dn->parent; + + dev = PCI_DN(dn)->pcidev; + if (dev) + *freset |= dev->needs_freset; + + __eeh_set_pe_freset(dn, freset); +} + /** * eeh_dn_check_failure - check if all 1's data is due to EEH slot freeze * @dn device node @@ -739,18 +772,21 @@ int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state stat /** * rtas_set_slot_reset -- assert the pci #RST line for 1/4 second * @pdn: pci device node to be reset. - * - * Return 0 if success, else a non-zero value. */ static void __rtas_set_slot_reset(struct pci_dn *pdn) { - struct pci_dev *dev = pdn->pcidev; + unsigned int freset = 0; - /* Determine type of EEH reset required by device, - * default hot reset or fundamental reset - */ - if (dev && dev->needs_freset) + /* Determine type of EEH reset required for + * Partitionable Endpoint, a hot-reset (1) + * or a fundamental reset (3). + * A fundamental reset required by any device under + * Partitionable Endpoint trumps hot-reset. + */ + eeh_set_pe_freset(pdn->node, &freset); + + if (freset) rtas_pci_slot_reset(pdn, 3); else rtas_pci_slot_reset(pdn, 1); |