initial_commit

1 files changed, 59 insertions, 0 deletions

diff --git a/include/linux/msi.h b/include/linux/msi.h
new file mode 100644
index 00000000..05acced4
--- /dev/null
+++ b/include/linux/msi.h
@@ -0,0 +1,59 @@
+#ifndef LINUX_MSI_H
+#define LINUX_MSI_H
+
+#include <linux/list.h>
+
+struct msi_msg {
+	u32	address_lo;	/* low 32 bits of msi message address */
+	u32	address_hi;	/* high 32 bits of msi message address */
+	u32	data;		/* 16 bits of msi message data */
+};
+
+/* Helper functions */
+struct irq_data;
+struct msi_desc;
+extern void mask_msi_irq(struct irq_data *data);
+extern void unmask_msi_irq(struct irq_data *data);
+extern void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
+extern void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
+extern void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
+extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
+extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
+extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
+
+struct msi_desc {
+	struct {
+		__u8	is_msix	: 1;
+		__u8	multiple: 3;	/* log2 number of messages */
+		__u8	maskbit	: 1; 	/* mask-pending bit supported ?   */
+		__u8	is_64	: 1;	/* Address size: 0=32bit 1=64bit  */
+		__u8	pos;	 	/* Location of the msi capability */
+		__u16	entry_nr;    	/* specific enabled entry 	  */
+		unsigned default_irq;	/* default pre-assigned irq	  */
+	} msi_attrib;
+
+	u32 masked;			/* mask bits */
+	unsigned int irq;
+	struct list_head list;
+
+	union {
+		void __iomem *mask_base;
+		u8 mask_pos;
+	};
+	struct pci_dev *dev;
+
+	/* Last set MSI message */
+	struct msi_msg msg;
+};
+
+/*
+ * The arch hook for setup up msi irqs
+ */
+int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
+void arch_teardown_msi_irq(unsigned int irq);
+extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
+extern void arch_teardown_msi_irqs(struct pci_dev *dev);
+extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
+
+
+#endif /* LINUX_MSI_H */