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| 2 | |
| 3 | * Copyright 2006-2007, Michael Ellerman, IBM Corporation.
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| 4 |
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| 5 |
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| 6 | #include <linux/kernel.h>
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| 7 | #include <linux/msi.h>
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| 8 | #include <linux/pci.h>
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| 9 |
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| 10 | #include <asm/machdep.h>
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| 11 |
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| 12 | int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
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| 13 | {
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| 14 | struct pci_controller *phb = pci_bus_to_host(dev->bus);
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| 15 |
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| 16 | if (!phb->controller_ops.setup_msi_irqs ||
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| 17 | !phb->controller_ops.teardown_msi_irqs) {
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| 18 | pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
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| 19 | return -ENOSYS;
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| 20 | }
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| 21 |
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| 22 |
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| 23 | if (type == PCI_CAP_ID_MSI && nvec > 1)
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| 24 | return 1;
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| 25 |
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| 26 | return phb->controller_ops.setup_msi_irqs(dev, nvec, type);
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| 27 | }
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| 28 |
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| 29 | void arch_teardown_msi_irqs(struct pci_dev *dev)
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| 30 | {
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| 31 | struct pci_controller *phb = pci_bus_to_host(dev->bus);
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| 32 |
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| 33 | |
| 34 | * We can be called even when arch_setup_msi_irqs() returns -ENOSYS,
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| 35 | * so check the pointer again.
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| 36 |
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| 37 | if (phb->controller_ops.teardown_msi_irqs)
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| 38 | phb->controller_ops.teardown_msi_irqs(dev);
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| 39 | }
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