include/linux/irq_sim.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (C) 2017-2018 Bartosz Golaszewski <brgl@bgdev.pl>
   4  */
   5
   6 #ifndef _LINUX_IRQ_SIM_H
   7 #define _LINUX_IRQ_SIM_H
   8
   9 #include <linux/irq_work.h>
  10 #include <linux/device.h>
  11
  12 /*
  13  * Provides a framework for allocating simulated interrupts which can be
  14  * requested like normal irqs and enqueued from process context.
  15  */
  16
  17 struct irq_sim_work_ctx {
  18         struct irq_work         work;
  19         unsigned long           *pending;
  20 };
  21
  22 struct irq_sim_irq_ctx {
  23         int                     irqnum;
  24         bool                    enabled;
  25 };
  26
  27 struct irq_sim {
  28         struct irq_sim_work_ctx work_ctx;
  29         int                     irq_base;
  30         unsigned int            irq_count;
  31         struct irq_sim_irq_ctx  *irqs;
  32 };
  33
  34 int irq_sim_init(struct irq_sim *sim, unsigned int num_irqs);
  35 int devm_irq_sim_init(struct device *dev, struct irq_sim *sim,
  36                       unsigned int num_irqs);
  37 void irq_sim_fini(struct irq_sim *sim);
  38 void irq_sim_fire(struct irq_sim *sim, unsigned int offset);
  39 int irq_sim_irqnum(struct irq_sim *sim, unsigned int offset);
  40
  41 #endif /* _LINUX_IRQ_SIM_H */