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// 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);
}
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