1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright 2006-2007, Michael Ellerman, IBM Corporation.
 
 
 
 
 
 4 */
 5
 6#include <linux/kernel.h>
 7#include <linux/msi.h>
 8#include <linux/pci.h>
 9
10#include <asm/machdep.h>
11
12int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
13{
14	struct pci_controller *phb = pci_bus_to_host(dev->bus);
15
16	if (!phb->controller_ops.setup_msi_irqs ||
17	    !phb->controller_ops.teardown_msi_irqs) {
18		pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
19		return -ENOSYS;
20	}
21
22	/* PowerPC doesn't support multiple MSI yet */
23	if (type == PCI_CAP_ID_MSI && nvec > 1)
24		return 1;
25
26	return phb->controller_ops.setup_msi_irqs(dev, nvec, type);
27}
28
29void arch_teardown_msi_irqs(struct pci_dev *dev)
30{
31	struct pci_controller *phb = pci_bus_to_host(dev->bus);
32
33	/*
34	 * We can be called even when arch_setup_msi_irqs() returns -ENOSYS,
35	 * so check the pointer again.
36	 */
37	if (phb->controller_ops.teardown_msi_irqs)
38		phb->controller_ops.teardown_msi_irqs(dev);
39}

 
 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
16int 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
33void 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}