da8d1c8ba4
This patch adds a per-pci-device subdirectory in sysfs called: /sys/bus/pci/devices/<device>/msi_irqs This sub-directory exports the set of msi vectors allocated by a given pci device, by creating a numbered sub-directory for each vector beneath msi_irqs. For each vector various attributes can be exported. Currently the only attribute is called mode, which tracks the operational mode of that vector (msi vs. msix) Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
#ifndef LINUX_MSI_H
|
|
#define LINUX_MSI_H
|
|
|
|
#include <linux/kobject.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;
|
|
|
|
struct kobject kobj;
|
|
};
|
|
|
|
/*
|
|
* 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 */
|