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RISC-V IMSIC interrupt controller provides IPI and MSI support. Currently, DT based drivers setup the IPI feature early during boot but defer setting up the MSI functionality. However, in ACPI systems, PCI subsystem is probed early and assume MSI controller is already setup. Hence, both IPI and MSI features need to be initialized early itself. Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Tested-by: Björn Töpel <bjorn@rivosinc.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Link: https://patch.msgid.link/20240812005929.113499-16-sunilvl@ventanamicro.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
109 lines
2.8 KiB
C
109 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;
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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(void);
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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);
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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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