mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 16:13:54 +08:00
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>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
#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_desc;
|
|
extern void mask_msi_irq(unsigned int irq);
|
|
extern void unmask_msi_irq(unsigned int irq);
|
|
extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
|
|
extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
|
|
extern void read_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 */
|