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 */
16 struct 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 */
40 struct 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
65 bool 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);
68 int xive_core_debug_init(void);
69
70 static inline u32 xive_alloc_order(u32 queue_shift)
71 {
72 return (queue_shift > PAGE_SHIFT) ? (queue_shift - PAGE_SHIFT) : 0;
73 }
74
75 extern bool xive_cmdline_disabled;
76 extern bool xive_has_save_restore;
77
78 #endif /* __XIVE_INTERNAL_H */
79
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