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
/*
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* Copyright 2006-2007, Michael Ellerman, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/msi.h>
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#include <asm/machdep.h>
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int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
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{
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if (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs) {
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pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
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return -ENOSYS;
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}
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if (ppc_md.msi_check_device) {
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pr_debug("msi: Using platform check routine.\n");
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return ppc_md.msi_check_device(dev, nvec, type);
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}
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return 0;
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}
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int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
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{
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return ppc_md.setup_msi_irqs(dev, nvec, type);
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}
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void arch_teardown_msi_irqs(struct pci_dev *dev)
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{
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return ppc_md.teardown_msi_irqs(dev);
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}
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