1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright 2016,2017 IBM Corporation.
4  */
5 #ifndef __XIVE_INTERNAL_H
6 #define __XIVE_INTERNAL_H
7 
8 /* Each CPU carry one of these with various per-CPU state */
9 struct xive_cpu {
10 #ifdef CONFIG_SMP
11 	/* HW irq number and data of IPI */
12 	u32 hw_ipi;
13 	struct xive_irq_data ipi_data;
14 #endif /* CONFIG_SMP */
15 
16 	int chip_id;
17 
18 	/* Queue datas. Only one is populated */
19 #define XIVE_MAX_QUEUES	8
20 	struct xive_q queue[XIVE_MAX_QUEUES];
21 
22 	/*
23 	 * Pending mask. Each bit corresponds to a priority that
24 	 * potentially has pending interrupts.
25 	 */
26 	u8 pending_prio;
27 
28 	/* Cache of HW CPPR */
29 	u8 cppr;
30 };
31 
32 /* Backend ops */
33 struct xive_ops {
34 	int	(*populate_irq_data)(u32 hw_irq, struct xive_irq_data *data);
35 	int 	(*configure_irq)(u32 hw_irq, u32 target, u8 prio, u32 sw_irq);
36 	int	(*get_irq_config)(u32 hw_irq, u32 *target, u8 *prio,
37 				  u32 *sw_irq);
38 	int	(*setup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio);
39 	void	(*cleanup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio);
40 	void	(*setup_cpu)(unsigned int cpu, struct xive_cpu *xc);
41 	void	(*teardown_cpu)(unsigned int cpu, struct xive_cpu *xc);
42 	bool	(*match)(struct device_node *np);
43 	void	(*shutdown)(void);
44 
45 	void	(*update_pending)(struct xive_cpu *xc);
46 	void	(*eoi)(u32 hw_irq);
47 	void	(*sync_source)(u32 hw_irq);
48 	u64	(*esb_rw)(u32 hw_irq, u32 offset, u64 data, bool write);
49 #ifdef CONFIG_SMP
50 	int	(*get_ipi)(unsigned int cpu, struct xive_cpu *xc);
51 	void	(*put_ipi)(unsigned int cpu, struct xive_cpu *xc);
52 #endif
53 	const char *name;
54 };
55 
56 bool xive_core_init(const struct xive_ops *ops, void __iomem *area, u32 offset,
57 		    u8 max_prio);
58 __be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift);
59 
60 static inline u32 xive_alloc_order(u32 queue_shift)
61 {
62 	return (queue_shift > PAGE_SHIFT) ? (queue_shift - PAGE_SHIFT) : 0;
63 }
64 
65 extern bool xive_cmdline_disabled;
66 
67 #endif /*  __XIVE_INTERNAL_H */
68