Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 1 | #ifndef LINUX_MSI_H |
| 2 | #define LINUX_MSI_H |
| 3 | |
Neil Horman | b50cac5 | 2011-10-06 14:08:18 -0400 | [diff] [blame] | 4 | #include <linux/kobject.h> |
Michael Ellerman | 4aa9bc9 | 2007-04-05 17:19:10 +1000 | [diff] [blame] | 5 | #include <linux/list.h> |
| 6 | |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 7 | struct msi_msg { |
| 8 | u32 address_lo; /* low 32 bits of msi message address */ |
| 9 | u32 address_hi; /* high 32 bits of msi message address */ |
| 10 | u32 data; /* 16 bits of msi message data */ |
| 11 | }; |
| 12 | |
Yijing Wang | 38737d8 | 2014-10-27 10:44:36 +0800 | [diff] [blame] | 13 | extern int pci_msi_ignore_mask; |
Satoru Takeuchi | c54c187 | 2007-01-18 13:50:05 +0900 | [diff] [blame] | 14 | /* Helper functions */ |
Thomas Gleixner | 1c9db52 | 2010-09-28 16:46:51 +0200 | [diff] [blame] | 15 | struct irq_data; |
Thomas Gleixner | 39431ac | 2010-09-28 19:09:51 +0200 | [diff] [blame] | 16 | struct msi_desc; |
Bjorn Helgaas | 2366d06 | 2013-04-18 10:55:46 -0600 | [diff] [blame] | 17 | void mask_msi_irq(struct irq_data *data); |
| 18 | void unmask_msi_irq(struct irq_data *data); |
Bjorn Helgaas | 2366d06 | 2013-04-18 10:55:46 -0600 | [diff] [blame] | 19 | void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); |
Bjorn Helgaas | 2366d06 | 2013-04-18 10:55:46 -0600 | [diff] [blame] | 20 | void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); |
Jiang Liu | 891d4a4 | 2014-11-09 23:10:33 +0800 | [diff] [blame] | 21 | |
Yijing Wang | 03f56e4 | 2014-10-27 10:44:37 +0800 | [diff] [blame] | 22 | u32 __msix_mask_irq(struct msi_desc *desc, u32 flag); |
| 23 | u32 __msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 24 | |
| 25 | struct msi_desc { |
| 26 | struct { |
Matthew Wilcox | 24d2755 | 2009-03-17 08:54:06 -0400 | [diff] [blame] | 27 | __u8 is_msix : 1; |
Yijing Wang | 31ea5d4 | 2014-06-19 16:30:30 +0800 | [diff] [blame] | 28 | __u8 multiple: 3; /* log2 num of messages allocated */ |
| 29 | __u8 multi_cap : 3; /* log2 num of messages supported */ |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 30 | __u8 maskbit : 1; /* mask-pending bit supported ? */ |
| 31 | __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 32 | __u16 entry_nr; /* specific enabled entry */ |
| 33 | unsigned default_irq; /* default pre-assigned irq */ |
Matthew Wilcox | f2440d9 | 2009-03-17 08:54:09 -0400 | [diff] [blame] | 34 | } msi_attrib; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 35 | |
Matthew Wilcox | f2440d9 | 2009-03-17 08:54:09 -0400 | [diff] [blame] | 36 | u32 masked; /* mask bits */ |
Michael Ellerman | 4aa9bc9 | 2007-04-05 17:19:10 +1000 | [diff] [blame] | 37 | unsigned int irq; |
Alexander Gordeev | 65f6ae6 | 2013-05-13 11:05:48 +0200 | [diff] [blame] | 38 | unsigned int nvec_used; /* number of messages */ |
Michael Ellerman | 4aa9bc9 | 2007-04-05 17:19:10 +1000 | [diff] [blame] | 39 | struct list_head list; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 40 | |
Matthew Wilcox | 264d9ca | 2009-03-17 08:54:08 -0400 | [diff] [blame] | 41 | union { |
| 42 | void __iomem *mask_base; |
| 43 | u8 mask_pos; |
| 44 | }; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 45 | struct pci_dev *dev; |
| 46 | |
Eric W. Biederman | 392ee1e | 2007-03-08 13:04:57 -0700 | [diff] [blame] | 47 | /* Last set MSI message */ |
| 48 | struct msi_msg msg; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 49 | }; |
| 50 | |
Jiang Liu | 891d4a4 | 2014-11-09 23:10:33 +0800 | [diff] [blame] | 51 | void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); |
Jiang Liu | 83a1891 | 2014-11-09 23:10:34 +0800 | [diff] [blame^] | 52 | void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); |
| 53 | void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg); |
| 54 | |
| 55 | /* Conversion helpers. Should be removed after merging */ |
| 56 | static inline void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) |
| 57 | { |
| 58 | __pci_write_msi_msg(entry, msg); |
| 59 | } |
| 60 | static inline void write_msi_msg(int irq, struct msi_msg *msg) |
| 61 | { |
| 62 | pci_write_msi_msg(irq, msg); |
| 63 | } |
Jiang Liu | 891d4a4 | 2014-11-09 23:10:33 +0800 | [diff] [blame] | 64 | |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 65 | /* |
Thomas Petazzoni | 4287d82 | 2013-08-09 22:27:06 +0200 | [diff] [blame] | 66 | * The arch hooks to setup up msi irqs. Those functions are |
| 67 | * implemented as weak symbols so that they /can/ be overriden by |
| 68 | * architecture specific code if needed. |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 69 | */ |
Eric W. Biederman | f7feaca | 2007-01-28 12:56:37 -0700 | [diff] [blame] | 70 | 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] | 71 | void arch_teardown_msi_irq(unsigned int irq); |
Bjorn Helgaas | 2366d06 | 2013-04-18 10:55:46 -0600 | [diff] [blame] | 72 | int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); |
| 73 | void arch_teardown_msi_irqs(struct pci_dev *dev); |
DuanZhenzhong | ac8344c | 2013-12-04 13:09:16 +0800 | [diff] [blame] | 74 | void arch_restore_msi_irqs(struct pci_dev *dev); |
Thomas Petazzoni | 4287d82 | 2013-08-09 22:27:06 +0200 | [diff] [blame] | 75 | |
| 76 | void default_teardown_msi_irqs(struct pci_dev *dev); |
DuanZhenzhong | ac8344c | 2013-12-04 13:09:16 +0800 | [diff] [blame] | 77 | void default_restore_msi_irqs(struct pci_dev *dev); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 78 | |
Yijing Wang | c2791b8 | 2014-11-11 17:45:45 -0700 | [diff] [blame] | 79 | struct msi_controller { |
Thierry Reding | 0cbdcfc | 2013-08-09 22:27:08 +0200 | [diff] [blame] | 80 | struct module *owner; |
| 81 | struct device *dev; |
Thomas Petazzoni | 0d5a6db | 2013-08-09 22:27:09 +0200 | [diff] [blame] | 82 | struct device_node *of_node; |
| 83 | struct list_head list; |
Thierry Reding | 0cbdcfc | 2013-08-09 22:27:08 +0200 | [diff] [blame] | 84 | |
Yijing Wang | c2791b8 | 2014-11-11 17:45:45 -0700 | [diff] [blame] | 85 | int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev, |
Thierry Reding | 0cbdcfc | 2013-08-09 22:27:08 +0200 | [diff] [blame] | 86 | struct msi_desc *desc); |
Yijing Wang | c2791b8 | 2014-11-11 17:45:45 -0700 | [diff] [blame] | 87 | void (*teardown_irq)(struct msi_controller *chip, unsigned int irq); |
Thierry Reding | 0cbdcfc | 2013-08-09 22:27:08 +0200 | [diff] [blame] | 88 | }; |
| 89 | |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 90 | #endif /* LINUX_MSI_H */ |