40 lines
989 B
C
40 lines
989 B
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2006-2007, Michael Ellerman, IBM Corporation.
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*/
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#include <linux/kernel.h>
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#include <linux/msi.h>
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#include <linux/pci.h>
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#include <asm/machdep.h>
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int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
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{
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struct pci_controller *phb = pci_bus_to_host(dev->bus);
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if (!phb->controller_ops.setup_msi_irqs ||
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!phb->controller_ops.teardown_msi_irqs) {
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pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
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return -ENOSYS;
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}
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/* PowerPC doesn't support multiple MSI yet */
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if (type == PCI_CAP_ID_MSI && nvec > 1)
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return 1;
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return phb->controller_ops.setup_msi_irqs(dev, nvec, type);
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}
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void arch_teardown_msi_irqs(struct pci_dev *dev)
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{
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struct pci_controller *phb = pci_bus_to_host(dev->bus);
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/*
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* We can be called even when arch_setup_msi_irqs() returns -ENOSYS,
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* so check the pointer again.
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*/
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if (phb->controller_ops.teardown_msi_irqs)
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phb->controller_ops.teardown_msi_irqs(dev);
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}
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