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_msi_check_device(struct pci_dev* dev, int nvec, int type) 17 { 18 if (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs) { 19 pr_debug("msi: Platform doesn't provide MSI callbacks.\n"); 20 return -ENOSYS; 21 } 22 23 /* PowerPC doesn't support multiple MSI yet */ 24 if (type == PCI_CAP_ID_MSI && nvec > 1) 25 return 1; 26 27 if (ppc_md.msi_check_device) { 28 pr_debug("msi: Using platform check routine.\n"); 29 return ppc_md.msi_check_device(dev, nvec, type); 30 } 31 32 return 0; 33 } 34 35 int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) 36 { 37 return ppc_md.setup_msi_irqs(dev, nvec, type); 38 } 39 40 void arch_teardown_msi_irqs(struct pci_dev *dev) 41 { 42 ppc_md.teardown_msi_irqs(dev); 43 } 44