[deliverable/linux.git] / include / linux / msi.h

#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 */
Commit	Line	Data
	1	#ifndef LINUX_MSI_H
	2	#define LINUX_MSI_H
	3
	4	#include <linux/list.h>
	5
	6	struct msi_msg {
	7	u32 address_lo; /* low 32 bits of msi message address */
	8	u32 address_hi; /* high 32 bits of msi message address */
	9	u32 data; /* 16 bits of msi message data */
	10	};
	11
	12	/* Helper functions */
	13	struct irq_data;
	14	struct msi_desc;
	15	extern void mask_msi_irq(struct irq_data *data);
	16	extern void unmask_msi_irq(struct irq_data *data);
	17	extern void __read_msi_msg(struct msi_desc entry, struct msi_msg msg);
	18	extern void __get_cached_msi_msg(struct msi_desc entry, struct msi_msg msg);
	19	extern void __write_msi_msg(struct msi_desc entry, struct msi_msg msg);
	20	extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
	21	extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
	22	extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
	23
	24	struct msi_desc {
	25	struct {
	26	__u8 is_msix : 1;
	27	__u8 multiple: 3; /* log2 number of messages */
	28	__u8 maskbit : 1; /* mask-pending bit supported ? */
	29	__u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
	30	__u8 pos; /* Location of the msi capability */
	31	__u16 entry_nr; /* specific enabled entry */
	32	unsigned default_irq; /* default pre-assigned irq */
	33	} msi_attrib;
	34
	35	u32 masked; /* mask bits */
	36	unsigned int irq;
	37	struct list_head list;
	38
	39	union {
	40	void __iomem *mask_base;
	41	u8 mask_pos;
	42	};
	43	struct pci_dev *dev;
	44
	45	/* Last set MSI message */
	46	struct msi_msg msg;
	47	};
	48
	49	/*
	50	* The arch hook for setup up msi irqs
	51	*/
	52	int arch_setup_msi_irq(struct pci_dev dev, struct msi_desc desc);
	53	void arch_teardown_msi_irq(unsigned int irq);
	54	extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
	55	extern void arch_teardown_msi_irqs(struct pci_dev *dev);
	56	extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
	57
	58
	59	#endif /* LINUX_MSI_H */