/* SPDX-License-Identifier: GPL-2.0-only */ /* * Tegra host1x Interrupt Management * * Copyright (c) 2010-2013, NVIDIA Corporation. */ #ifndef __HOST1X_INTR_H #define __HOST1X_INTR_H #include <linux/interrupt.h> #include <linux/workqueue.h> struct host1x_syncpt; struct host1x; enum host1x_intr_action { /* * Perform cleanup after a submit has completed. * 'data' points to a channel */ HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0, /* * Wake up a task. * 'data' points to a wait_queue_head_t */ HOST1X_INTR_ACTION_WAKEUP, /* * Wake up a interruptible task. * 'data' points to a wait_queue_head_t */ HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE, HOST1X_INTR_ACTION_COUNT }; struct host1x_syncpt_intr { spinlock_t lock; struct list_head wait_head; char thresh_irq_name[12]; struct work_struct work; }; struct host1x_waitlist { struct list_head list; struct kref refcount; u32 thresh; enum host1x_intr_action action; atomic_t state; void *data; int count; }; /* * Schedule an action to be taken when a sync point reaches the given threshold. * * @id the sync point * @thresh the threshold * @action the action to take * @data a pointer to extra data depending on action, see above * @waiter waiter structure - assumes ownership * @ref must be passed if cancellation is possible, else NULL * * This is a non-blocking api. */ int host1x_intr_add_action(struct host1x *host, struct host1x_syncpt *syncpt, u32 thresh, enum host1x_intr_action action, void *data, struct host1x_waitlist *waiter, void **ref); /* * Unreference an action submitted to host1x_intr_add_action(). * You must call this if you passed non-NULL as ref. * @ref the ref returned from host1x_intr_add_action() */ void host1x_intr_put_ref(struct host1x *host, unsigned int id, void *ref); /* Initialize host1x sync point interrupt */ int host1x_intr_init(struct host1x *host, unsigned int irq_sync); /* Deinitialize host1x sync point interrupt */ void host1x_intr_deinit(struct host1x *host); /* Enable host1x sync point interrupt */ void host1x_intr_start(struct host1x *host); /* Disable host1x sync point interrupt */ void host1x_intr_stop(struct host1x *host); irqreturn_t host1x_syncpt_thresh_fn(void *dev_id); #endif