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
 18struct 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
 29struct 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
 45struct 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
 63extern struct imsic_priv *imsic;
 64
 65void __imsic_eix_update(unsigned long base_id, unsigned long num_id, bool pend, bool val);
 66
 67static inline void __imsic_id_set_enable(unsigned long id)
 68{
 69	__imsic_eix_update(id, 1, false, true);
 70}
 71
 72static inline void __imsic_id_clear_enable(unsigned long id)
 73{
 74	__imsic_eix_update(id, 1, false, false);
 75}
 76
 77void imsic_local_sync_all(void);
 78void imsic_local_delivery(bool enable);
 79
 80void imsic_vector_mask(struct imsic_vector *vec);
 81void imsic_vector_unmask(struct imsic_vector *vec);
 82
 83static inline bool imsic_vector_isenabled(struct imsic_vector *vec)
 84{
 85	return READ_ONCE(vec->enable);
 86}
 87
 88static inline struct imsic_vector *imsic_vector_get_move(struct imsic_vector *vec)
 89{
 90	return READ_ONCE(vec->move);
 91}
 92
 93void imsic_vector_move(struct imsic_vector *old_vec, struct imsic_vector *new_vec);
 94
 95struct imsic_vector *imsic_vector_from_local_id(unsigned int cpu, unsigned int local_id);
 96
 97struct imsic_vector *imsic_vector_alloc(unsigned int hwirq, const struct cpumask *mask);
 98void imsic_vector_free(struct imsic_vector *vector);
 99
100void imsic_vector_debug_show(struct seq_file *m, struct imsic_vector *vec, int ind);
101void imsic_vector_debug_show_summary(struct seq_file *m, int ind);
102
103void imsic_state_online(void);
104void imsic_state_offline(void);
105int imsic_setup_state(struct fwnode_handle *fwnode, void *opaque);
106int imsic_irqdomain_init(void);
107
108#endif