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