44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
|
/*
|
||
|
|
* Copyright 2006-2007, Michael Ellerman, IBM Corporation.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the License, or (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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);
|
||
|
|
}
|