1 /* 2 * Copyright 2006-2007, Michael Ellerman, IBM Corporation. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/msi.h> 12 #include <linux/pci.h> 13 14 #include <asm/machdep.h> 15 16 int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) 17 { 18 struct pci_controller *phb = pci_bus_to_host(dev->bus); 19 20 if (!phb->controller_ops.setup_msi_irqs || 21 !phb->controller_ops.teardown_msi_irqs) { 22 pr_debug("msi: Platform doesn't provide MSI callbacks.\n"); 23 return -ENOSYS; 24 } 25 26 /* PowerPC doesn't support multiple MSI yet */ 27 if (type == PCI_CAP_ID_MSI && nvec > 1) 28 return 1; 29 30 return phb->controller_ops.setup_msi_irqs(dev, nvec, type); 31 } 32 33 void arch_teardown_msi_irqs(struct pci_dev *dev) 34 { 35 struct pci_controller *phb = pci_bus_to_host(dev->bus); 36 37 phb->controller_ops.teardown_msi_irqs(dev); 38 } 39