From df87ef5508b40fc655b6c4771be31741d8ec1596 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 8 May 2007 12:58:34 +1000 Subject: [POWERPC] PowerPC MSI infrastructure 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 Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/msi.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 arch/powerpc/kernel/msi.c (limited to 'arch/powerpc/kernel/msi.c') diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c new file mode 100644 index 0000000..c62d101 --- /dev/null +++ b/arch/powerpc/kernel/msi.c @@ -0,0 +1,38 @@ +/* + * 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 +#include + +#include + +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); +} -- cgit v1.1