1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef LINUX_HTIRQ_H 3 #define LINUX_HTIRQ_H 4 5 struct pci_dev; 6 struct irq_data; 7 8 struct ht_irq_msg { 9 u32 address_lo; /* low 32 bits of the ht irq message */ 10 u32 address_hi; /* high 32 bits of the it irq message */ 11 }; 12 13 typedef void (ht_irq_update_t)(struct pci_dev *dev, int irq, 14 struct ht_irq_msg *msg); 15 16 struct ht_irq_cfg { 17 struct pci_dev *dev; 18 /* Update callback used to cope with buggy hardware */ 19 ht_irq_update_t *update; 20 unsigned pos; 21 unsigned idx; 22 struct ht_irq_msg msg; 23 }; 24 25 /* Helper functions.. */ 26 void fetch_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg); 27 void write_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg); 28 void mask_ht_irq(struct irq_data *data); 29 void unmask_ht_irq(struct irq_data *data); 30 31 /* The arch hook for getting things started */ 32 int arch_setup_ht_irq(int idx, int pos, struct pci_dev *dev, 33 ht_irq_update_t *update); 34 void arch_teardown_ht_irq(unsigned int irq); 35 36 /* For drivers of buggy hardware */ 37 int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update); 38 39 #endif /* LINUX_HTIRQ_H */ 40