[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 <linas@austin.ibm.com> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Коммит
00c2ae35bd
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@ -579,6 +579,36 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state)
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rc, state, pdn->node->full_name);
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}
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/**
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* pcibios_set_pcie_slot_reset - Set PCI-E reset state
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* @dev: pci device struct
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* @state: reset state to enter
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*
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* Return value:
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* 0 if success
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**/
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int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state)
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{
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struct device_node *dn = pci_device_to_OF_node(dev);
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struct pci_dn *pdn = PCI_DN(dn);
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switch (state) {
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case pcie_deassert_reset:
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rtas_pci_slot_reset(pdn, 0);
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break;
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case pcie_hot_reset:
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rtas_pci_slot_reset(pdn, 1);
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break;
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case pcie_warm_reset:
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rtas_pci_slot_reset(pdn, 3);
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break;
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default:
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return -EINVAL;
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};
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return 0;
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}
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/**
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* rtas_set_slot_reset -- assert the pci #RST line for 1/4 second
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* @pdn: pci device node to be reset.
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