initial_commit

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c
new file mode 100644
index 00000000..8bbc12d2
--- /dev/null
+++ b/arch/powerpc/kernel/msi.c
@@ -0,0 +1,43 @@
+/*
+ * 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 <linux/pci.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;
+	}
+
+	/* PowerPC doesn't support multiple MSI yet */
+	if (type == PCI_CAP_ID_MSI && nvec > 1)
+		return 1;
+
+	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)
+{
+	ppc_md.teardown_msi_irqs(dev);
+}