mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-24 11:34:50 +08:00
df87ef5508
This provides the architecture specific hooks to support MSI on powerpc. We implement the newly added arch_setup_msi_irqs() and arch_teardown_msi_irqs(), and then delegate to ppc_md routines. Platforms that don't implement MSI will leave the ppc_md calls blank, arch_msi_check_device() will detect this and return ENOSYS. Drivers should detect this error and continue to use LSI. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
39 lines
981 B
C
39 lines
981 B
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 <asm/machdep.h>
|
|
|
|
int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
|
|
{
|
|
if (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs) {
|
|
pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
if (ppc_md.msi_check_device) {
|
|
pr_debug("msi: Using platform check routine.\n");
|
|
return ppc_md.msi_check_device(dev, nvec, type);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
|
|
{
|
|
return ppc_md.setup_msi_irqs(dev, nvec, type);
|
|
}
|
|
|
|
void arch_teardown_msi_irqs(struct pci_dev *dev)
|
|
{
|
|
return ppc_md.teardown_msi_irqs(dev);
|
|
}
|