powerpc: Add powerpc PCI-E reset API implementation
Subsystems (2)
PATCH 1/1 powerpc: Add powerpc PCI-E reset API implementation
Adds the pSeries platform implementation for a new PCI API which can be used to issue various types of PCI-E reset, including PCI-E warm reset and PCI-E hot reset. This is needed for an ipr PCI-E adapter which does not properly implement BIST. Running BIST on this adapter results in PCI-E errors. The only reliable reset mechanism that exists on this hardware is PCI Fundamental reset (warm reset).
Acked-by Linas Vepstas <[email protected]>
Signed-off-by Brian King <[email protected]>
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Paul,
The generic PCI layer patch that this patch depends on is now in. This patch can now be merged. Hopefully it can still make 2.6.22.
Thanks,
Brian
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linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c | 30 +++++++++++++++++ 1 file changed, 30 insertions(+)
arch/powerpc/platforms/pseries/eeh.c renamed from arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api3 +30 -0
@@ -580,6 +580,36 @@ rtas_pci_slot_reset(struct pci_dn *pdn, }/** +* pcibios_set_pcie_slot_reset - Set PCI-E reset state +* @dev: pci device struct +* @state: reset state to enter +* +* Return value: +* 0 if success +**/ +int pcibios_set_pcie_reset_state (struct pci_dev *dev,enum pcie_reset_state state) +{ +struct device_node *dn =pci_device_to_OF_node (dev); +struct pci_dn *pdn =PCI_DN (dn); + +switch (state) { +case pcie_deassert_reset: +rtas_pci_slot_reset (pdn,0 ); +break ; +case pcie_hot_reset: +rtas_pci_slot_reset (pdn,1 ); +break ; +case pcie_warm_reset: +rtas_pci_slot_reset (pdn,3 ); +break ; +default : +return -EINVAL ; + }; + +return 0 ; +} + +/** * rtas_set_slot_reset -- assert the pci #RST line for 1/4 second * @pdn: pci device node to be reset. *
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