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/*
 9 * A "disabled" interrupt should never fire, to catch problems
10 * we set its logical number to this
11 */
12#define XIVE_BAD_IRQ		0x7fffffff
13#define XIVE_MAX_IRQ		(XIVE_BAD_IRQ - 1)
14
15/* Each CPU carry one of these with various per-CPU state */
16struct xive_cpu {
17#ifdef CONFIG_SMP
18	/* HW irq number and data of IPI */
19	u32 hw_ipi;
20	struct xive_irq_data ipi_data;
21#endif /* CONFIG_SMP */
22
23	int chip_id;
24
25	/* Queue datas. Only one is populated */
26#define XIVE_MAX_QUEUES	8
27	struct xive_q queue[XIVE_MAX_QUEUES];
28
29	/*
30	 * Pending mask. Each bit corresponds to a priority that
31	 * potentially has pending interrupts.
32	 */
33	u8 pending_prio;
34
35	/* Cache of HW CPPR */
36	u8 cppr;
37};
38
39/* Backend ops */
40struct xive_ops {
41	int	(*populate_irq_data)(u32 hw_irq, struct xive_irq_data *data);
42	int 	(*configure_irq)(u32 hw_irq, u32 target, u8 prio, u32 sw_irq);
43	int	(*get_irq_config)(u32 hw_irq, u32 *target, u8 *prio,
44				  u32 *sw_irq);
45	int	(*setup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio);
46	void	(*cleanup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio);
47	void	(*prepare_cpu)(unsigned int cpu, struct xive_cpu *xc);
48	void	(*setup_cpu)(unsigned int cpu, struct xive_cpu *xc);
49	void	(*teardown_cpu)(unsigned int cpu, struct xive_cpu *xc);
50	bool	(*match)(struct device_node *np);
51	void	(*shutdown)(void);
52
53	void	(*update_pending)(struct xive_cpu *xc);
54	void	(*sync_source)(u32 hw_irq);
55	u64	(*esb_rw)(u32 hw_irq, u32 offset, u64 data, bool write);
56#ifdef CONFIG_SMP
57	int	(*get_ipi)(unsigned int cpu, struct xive_cpu *xc);
58	void	(*put_ipi)(unsigned int cpu, struct xive_cpu *xc);
59#endif
60	int	(*debug_show)(struct seq_file *m, void *private);
61	int	(*debug_create)(struct dentry *xive_dir);
62	const char *name;
63};
64
65bool xive_core_init(struct device_node *np, const struct xive_ops *ops,
66		    void __iomem *area, u32 offset, u8 max_prio);
67__be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift);
68int xive_core_debug_init(void);
69
70static inline u32 xive_alloc_order(u32 queue_shift)
71{
72	return (queue_shift > PAGE_SHIFT) ? (queue_shift - PAGE_SHIFT) : 0;
73}
74
75extern bool xive_cmdline_disabled;
76extern bool xive_has_save_restore;
77
78#endif /*  __XIVE_INTERNAL_H */