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098788e118
[ Upstream commit 0f67911e82 ]
Currently, there is only one "move" pointer in struct imsic_vector so
during vector movement the old vector points to the new vector and new
vector points to itself.
To support forced cleanup of the old vector, add separate "move_next" and
"move_prev" pointers to struct imsic_vector, where during vector movement
the "move_next" pointer of the old vector points to the new vector and the
"move_prev" pointer of the new vector points to the old vector.
Both "move_next" and "move_prev" pointers are cleared separately by
__imsic_local_sync() with a restriction that "move_prev" on the new
CPU is cleared only after the old CPU has cleared "move_next".
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250217085657.789309-8-apatel@ventanamicro.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2021 Western Digital Corporation or its affiliates.
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* Copyright (C) 2022 Ventana Micro Systems Inc.
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*/
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#ifndef _IRQ_RISCV_IMSIC_STATE_H
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#define _IRQ_RISCV_IMSIC_STATE_H
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#include <linux/irqchip/riscv-imsic.h>
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#include <linux/irqdomain.h>
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#include <linux/fwnode.h>
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#include <linux/timer.h>
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#define IMSIC_IPI_ID 1
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#define IMSIC_NR_IPI 8
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struct imsic_vector {
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/* Fixed details of the vector */
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unsigned int cpu;
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unsigned int local_id;
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/* Details saved by driver in the vector */
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unsigned int hwirq;
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/* Details accessed using local lock held */
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bool enable;
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struct imsic_vector *move_next;
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struct imsic_vector *move_prev;
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};
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struct imsic_local_priv {
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/* Local lock to protect vector enable/move variables and dirty bitmap */
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raw_spinlock_t lock;
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/* Local dirty bitmap for synchronization */
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unsigned long *dirty_bitmap;
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#ifdef CONFIG_SMP
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/* Local timer for synchronization */
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struct timer_list timer;
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#endif
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/* Local vector table */
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struct imsic_vector *vectors;
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};
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struct imsic_priv {
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/* Device details */
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struct fwnode_handle *fwnode;
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/* Global configuration common for all HARTs */
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struct imsic_global_config global;
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/* Per-CPU state */
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struct imsic_local_priv __percpu *lpriv;
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/* State of IRQ matrix allocator */
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raw_spinlock_t matrix_lock;
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struct irq_matrix *matrix;
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/* IRQ domains (created by platform driver) */
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struct irq_domain *base_domain;
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};
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extern struct imsic_priv *imsic;
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void __imsic_eix_update(unsigned long base_id, unsigned long num_id, bool pend, bool val);
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static inline void __imsic_id_set_enable(unsigned long id)
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{
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__imsic_eix_update(id, 1, false, true);
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}
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static inline void __imsic_id_clear_enable(unsigned long id)
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{
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__imsic_eix_update(id, 1, false, false);
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}
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void imsic_local_sync_all(bool force_all);
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void imsic_local_delivery(bool enable);
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void imsic_vector_mask(struct imsic_vector *vec);
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void imsic_vector_unmask(struct imsic_vector *vec);
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static inline bool imsic_vector_isenabled(struct imsic_vector *vec)
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{
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return READ_ONCE(vec->enable);
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}
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static inline struct imsic_vector *imsic_vector_get_move(struct imsic_vector *vec)
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{
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return READ_ONCE(vec->move_prev);
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}
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void imsic_vector_move(struct imsic_vector *old_vec, struct imsic_vector *new_vec);
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struct imsic_vector *imsic_vector_from_local_id(unsigned int cpu, unsigned int local_id);
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struct imsic_vector *imsic_vector_alloc(unsigned int hwirq, const struct cpumask *mask);
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void imsic_vector_free(struct imsic_vector *vector);
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void imsic_vector_debug_show(struct seq_file *m, struct imsic_vector *vec, int ind);
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void imsic_vector_debug_show_summary(struct seq_file *m, int ind);
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void imsic_state_online(void);
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void imsic_state_offline(void);
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int imsic_setup_state(struct fwnode_handle *fwnode, void *opaque);
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int imsic_irqdomain_init(void);
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#endif
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