Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 1 | #ifndef LINUX_MSI_H |
| 2 | #define LINUX_MSI_H |
| 3 | |
Michael Ellerman | 4aa9bc9 | 2007-04-05 17:19:10 +1000 | [diff] [blame] | 4 | #include <linux/list.h> |
| 5 | |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 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 | |
Satoru Takeuchi | c54c187 | 2007-01-18 13:50:05 +0900 | [diff] [blame] | 12 | /* Helper functions */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 13 | struct irq_desc; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 14 | extern void mask_msi_irq(unsigned int irq); |
| 15 | extern void unmask_msi_irq(unsigned int irq); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 16 | extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); |
Ben Hutchings | 30da552 | 2010-07-23 14:56:28 +0100 | [diff] [blame^] | 17 | extern void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 18 | extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 19 | extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); |
Ben Hutchings | 30da552 | 2010-07-23 14:56:28 +0100 | [diff] [blame^] | 20 | extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 21 | extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); |
| 22 | |
| 23 | struct msi_desc { |
| 24 | struct { |
Matthew Wilcox | 24d2755 | 2009-03-17 08:54:06 -0400 | [diff] [blame] | 25 | __u8 is_msix : 1; |
Matthew Wilcox | 1c8d7b0 | 2009-03-17 08:54:10 -0400 | [diff] [blame] | 26 | __u8 multiple: 3; /* log2 number of messages */ |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 27 | __u8 maskbit : 1; /* mask-pending bit supported ? */ |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 28 | __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ |
| 29 | __u8 pos; /* Location of the msi capability */ |
| 30 | __u16 entry_nr; /* specific enabled entry */ |
| 31 | unsigned default_irq; /* default pre-assigned irq */ |
Matthew Wilcox | f2440d9 | 2009-03-17 08:54:09 -0400 | [diff] [blame] | 32 | } msi_attrib; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 33 | |
Matthew Wilcox | f2440d9 | 2009-03-17 08:54:09 -0400 | [diff] [blame] | 34 | u32 masked; /* mask bits */ |
Michael Ellerman | 4aa9bc9 | 2007-04-05 17:19:10 +1000 | [diff] [blame] | 35 | unsigned int irq; |
| 36 | struct list_head list; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 37 | |
Matthew Wilcox | 264d9ca | 2009-03-17 08:54:08 -0400 | [diff] [blame] | 38 | union { |
| 39 | void __iomem *mask_base; |
| 40 | u8 mask_pos; |
| 41 | }; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 42 | struct pci_dev *dev; |
| 43 | |
Eric W. Biederman | 392ee1e | 2007-03-08 13:04:57 -0700 | [diff] [blame] | 44 | /* Last set MSI message */ |
| 45 | struct msi_msg msg; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | /* |
| 49 | * The arch hook for setup up msi irqs |
| 50 | */ |
Eric W. Biederman | f7feaca | 2007-01-28 12:56:37 -0700 | [diff] [blame] | 51 | int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 52 | void arch_teardown_msi_irq(unsigned int irq); |
Michael Ellerman | 9c83133 | 2007-04-18 19:39:21 +1000 | [diff] [blame] | 53 | extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); |
Michael Ellerman | 032de8e | 2007-04-18 19:39:22 +1000 | [diff] [blame] | 54 | extern void arch_teardown_msi_irqs(struct pci_dev *dev); |
Michael Ellerman | c9953a7 | 2007-04-05 17:19:08 +1000 | [diff] [blame] | 55 | extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 56 | |
| 57 | |
| 58 | #endif /* LINUX_MSI_H */ |