linux/arch/powerpc/kernel/msi.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

40 lines
989 B
C

// 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);
}