98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Tegra host1x Interrupt Management
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*
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* Copyright (c) 2010-2013, NVIDIA Corporation.
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*/
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#ifndef __HOST1X_INTR_H
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#define __HOST1X_INTR_H
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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struct host1x_syncpt;
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struct host1x;
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enum host1x_intr_action {
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/*
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* Perform cleanup after a submit has completed.
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* 'data' points to a channel
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*/
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HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0,
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/*
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* Wake up a task.
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* 'data' points to a wait_queue_head_t
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*/
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HOST1X_INTR_ACTION_WAKEUP,
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/*
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* Wake up a interruptible task.
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* 'data' points to a wait_queue_head_t
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*/
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HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
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HOST1X_INTR_ACTION_SIGNAL_FENCE,
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HOST1X_INTR_ACTION_COUNT
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};
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struct host1x_syncpt_intr {
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spinlock_t lock;
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struct list_head wait_head;
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char thresh_irq_name[12];
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struct work_struct work;
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};
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struct host1x_waitlist {
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struct list_head list;
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struct kref refcount;
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u32 thresh;
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enum host1x_intr_action action;
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atomic_t state;
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void *data;
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int count;
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};
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/*
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* Schedule an action to be taken when a sync point reaches the given threshold.
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*
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* @id the sync point
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* @thresh the threshold
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* @action the action to take
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* @data a pointer to extra data depending on action, see above
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* @waiter waiter structure - assumes ownership
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* @ref must be passed if cancellation is possible, else NULL
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*
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* This is a non-blocking api.
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*/
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int host1x_intr_add_action(struct host1x *host, struct host1x_syncpt *syncpt,
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u32 thresh, enum host1x_intr_action action,
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void *data, struct host1x_waitlist *waiter,
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void **ref);
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/*
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* Unreference an action submitted to host1x_intr_add_action().
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* You must call this if you passed non-NULL as ref.
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* @ref the ref returned from host1x_intr_add_action()
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* @flush wait until any pending handlers have completed before returning.
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*/
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void host1x_intr_put_ref(struct host1x *host, unsigned int id, void *ref,
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bool flush);
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/* Initialize host1x sync point interrupt */
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int host1x_intr_init(struct host1x *host, unsigned int irq_sync);
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/* Deinitialize host1x sync point interrupt */
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void host1x_intr_deinit(struct host1x *host);
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/* Enable host1x sync point interrupt */
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void host1x_intr_start(struct host1x *host);
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/* Disable host1x sync point interrupt */
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void host1x_intr_stop(struct host1x *host);
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irqreturn_t host1x_syncpt_thresh_fn(void *dev_id);
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#endif
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