mirror of
https://github.com/followmsi/android_kernel_google_msm.git
synced 2024-09-22 04:32:41 +00:00
4aa9bc955d
The msi descriptors are linked together with what looks a lot like a linked list, but isn't a struct list_head list. Make it one. The only complication is that previously we walked a list of irqs, and got the descriptor for each with get_irq_msi(). Now we have a list of descriptors and need to get the irq out of it, so it needs to be in the actual struct msi_desc. We use 0 to indicate no irq is setup. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
47 lines
1.3 KiB
C
47 lines
1.3 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 */
|
|
extern void mask_msi_irq(unsigned int irq);
|
|
extern void unmask_msi_irq(unsigned int irq);
|
|
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 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
|
|
__u8 maskbit : 1; /* mask-pending bit supported ? */
|
|
__u8 masked : 1;
|
|
__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;
|
|
|
|
unsigned int irq;
|
|
struct list_head list;
|
|
|
|
void __iomem *mask_base;
|
|
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_msi_check_device(struct pci_dev* dev, int nvec, int type);
|
|
|
|
|
|
#endif /* LINUX_MSI_H */
|