// 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);}