1c8d7b0a56
Add the new API pci_enable_msi_block() to allow drivers to request multiple MSI and reimplement pci_enable_msi in terms of pci_enable_msi_block. Ensure that the architecture back ends don't have to know about multiple MSI. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
43 lines
1.1 KiB
C
43 lines
1.1 KiB
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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/* PowerPC doesn't support multiple MSI yet */
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if (type == PCI_CAP_ID_MSI && nvec > 1)
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return 1;
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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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ppc_md.teardown_msi_irqs(dev);
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}
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