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