1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2021 Western Digital Corporation or its affiliates.
4 * Copyright (C) 2022 Ventana Micro Systems Inc.
5 */
6
7 #ifndef _IRQ_RISCV_IMSIC_STATE_H
8 #define _IRQ_RISCV_IMSIC_STATE_H
9
10 #include <linux/irqchip/riscv-imsic.h>
11 #include <linux/irqdomain.h>
12 #include <linux/fwnode.h>
13 #include <linux/timer.h>
14
15 #define IMSIC_IPI_ID 1
16 #define IMSIC_NR_IPI 8
17
18 struct imsic_vector {
19 /* Fixed details of the vector */
20 unsigned int cpu;
21 unsigned int local_id;
22 /* Details saved by driver in the vector */
23 unsigned int hwirq;
24 /* Details accessed using local lock held */
25 bool enable;
26 struct imsic_vector *move;
27 };
28
29 struct imsic_local_priv {
30 /* Local lock to protect vector enable/move variables and dirty bitmap */
31 raw_spinlock_t lock;
32
33 /* Local dirty bitmap for synchronization */
34 unsigned long *dirty_bitmap;
35
36 #ifdef CONFIG_SMP
37 /* Local timer for synchronization */
38 struct timer_list timer;
39 #endif
40
41 /* Local vector table */
42 struct imsic_vector *vectors;
43 };
44
45 struct imsic_priv {
46 /* Device details */
47 struct fwnode_handle *fwnode;
48
49 /* Global configuration common for all HARTs */
50 struct imsic_global_config global;
51
52 /* Per-CPU state */
53 struct imsic_local_priv __percpu *lpriv;
54
55 /* State of IRQ matrix allocator */
56 raw_spinlock_t matrix_lock;
57 struct irq_matrix *matrix;
58
59 /* IRQ domains (created by platform driver) */
60 struct irq_domain *base_domain;
61 };
62
63 extern struct imsic_priv *imsic;
64
65 void __imsic_eix_update(unsigned long base_id, unsigned long num_id, bool pend, bool val);
66
__imsic_id_set_enable(unsigned long id)67 static inline void __imsic_id_set_enable(unsigned long id)
68 {
69 __imsic_eix_update(id, 1, false, true);
70 }
71
__imsic_id_clear_enable(unsigned long id)72 static inline void __imsic_id_clear_enable(unsigned long id)
73 {
74 __imsic_eix_update(id, 1, false, false);
75 }
76
77 void imsic_local_sync_all(void);
78 void imsic_local_delivery(bool enable);
79
80 void imsic_vector_mask(struct imsic_vector *vec);
81 void imsic_vector_unmask(struct imsic_vector *vec);
82
imsic_vector_isenabled(struct imsic_vector * vec)83 static inline bool imsic_vector_isenabled(struct imsic_vector *vec)
84 {
85 return READ_ONCE(vec->enable);
86 }
87
imsic_vector_get_move(struct imsic_vector * vec)88 static inline struct imsic_vector *imsic_vector_get_move(struct imsic_vector *vec)
89 {
90 return READ_ONCE(vec->move);
91 }
92
93 void imsic_vector_move(struct imsic_vector *old_vec, struct imsic_vector *new_vec);
94
95 struct imsic_vector *imsic_vector_from_local_id(unsigned int cpu, unsigned int local_id);
96
97 struct imsic_vector *imsic_vector_alloc(unsigned int hwirq, const struct cpumask *mask);
98 void imsic_vector_free(struct imsic_vector *vector);
99
100 void imsic_vector_debug_show(struct seq_file *m, struct imsic_vector *vec, int ind);
101 void imsic_vector_debug_show_summary(struct seq_file *m, int ind);
102
103 void imsic_state_online(void);
104 void imsic_state_offline(void);
105 int imsic_setup_state(struct fwnode_handle *fwnode, void *opaque);
106 int imsic_irqdomain_init(void);
107
108 #endif
109