48c3c38f00
"msi_attrib.pos" is only used for MSI (not MSI-X), and we already cache the MSI capability offset in "dev->msi_cap". Remove "pos" from the struct msi_attrib and use "dev->msi_cap" directly. [bhelgaas: changelog, fix whitespace] Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
78 lines
2.4 KiB
C
78 lines
2.4 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;
|
|
void mask_msi_irq(struct irq_data *data);
|
|
void unmask_msi_irq(struct irq_data *data);
|
|
void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
|
|
void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
|
|
void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
|
|
void read_msi_msg(unsigned int irq, struct msi_msg *msg);
|
|
void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
|
|
void write_msi_msg(unsigned int irq, struct msi_msg *msg);
|
|
|
|
struct msi_desc {
|
|
struct {
|
|
__u8 is_msix : 1;
|
|
__u8 multiple: 3; /* log2 num of messages allocated */
|
|
__u8 multi_cap : 3; /* log2 num of messages supported */
|
|
__u8 maskbit : 1; /* mask-pending bit supported ? */
|
|
__u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
|
|
__u16 entry_nr; /* specific enabled entry */
|
|
unsigned default_irq; /* default pre-assigned irq */
|
|
} msi_attrib;
|
|
|
|
u32 masked; /* mask bits */
|
|
unsigned int irq;
|
|
unsigned int nvec_used; /* number of messages */
|
|
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 hooks to setup up msi irqs. Those functions are
|
|
* implemented as weak symbols so that they /can/ be overriden by
|
|
* architecture specific code if needed.
|
|
*/
|
|
int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
|
|
void arch_teardown_msi_irq(unsigned int irq);
|
|
int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
|
|
void arch_teardown_msi_irqs(struct pci_dev *dev);
|
|
void arch_restore_msi_irqs(struct pci_dev *dev);
|
|
|
|
void default_teardown_msi_irqs(struct pci_dev *dev);
|
|
void default_restore_msi_irqs(struct pci_dev *dev);
|
|
u32 default_msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag);
|
|
u32 default_msix_mask_irq(struct msi_desc *desc, u32 flag);
|
|
|
|
struct msi_chip {
|
|
struct module *owner;
|
|
struct device *dev;
|
|
struct device_node *of_node;
|
|
struct list_head list;
|
|
|
|
int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev,
|
|
struct msi_desc *desc);
|
|
void (*teardown_irq)(struct msi_chip *chip, unsigned int irq);
|
|
};
|
|
|
|
#endif /* LINUX_MSI_H */
|