1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Tegra host1x Interrupt Management
5 * Copyright (c) 2010-2013, NVIDIA Corporation.
8 #ifndef __HOST1X_INTR_H
9 #define __HOST1X_INTR_H
11 #include <linux/interrupt.h>
12 #include <linux/workqueue.h>
17 enum host1x_intr_action {
19 * Perform cleanup after a submit has completed.
20 * 'data' points to a channel
22 HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0,
26 * 'data' points to a wait_queue_head_t
28 HOST1X_INTR_ACTION_WAKEUP,
31 * Wake up a interruptible task.
32 * 'data' points to a wait_queue_head_t
34 HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
36 HOST1X_INTR_ACTION_SIGNAL_FENCE,
38 HOST1X_INTR_ACTION_COUNT
41 struct host1x_syncpt_intr {
43 struct list_head wait_head;
44 char thresh_irq_name[12];
45 struct work_struct work;
48 struct host1x_waitlist {
49 struct list_head list;
52 enum host1x_intr_action action;
59 * Schedule an action to be taken when a sync point reaches the given threshold.
62 * @thresh the threshold
63 * @action the action to take
64 * @data a pointer to extra data depending on action, see above
65 * @waiter waiter structure - assumes ownership
66 * @ref must be passed if cancellation is possible, else NULL
68 * This is a non-blocking api.
70 int host1x_intr_add_action(struct host1x *host, struct host1x_syncpt *syncpt,
71 u32 thresh, enum host1x_intr_action action,
72 void *data, struct host1x_waitlist *waiter,
76 * Unreference an action submitted to host1x_intr_add_action().
77 * You must call this if you passed non-NULL as ref.
78 * @ref the ref returned from host1x_intr_add_action()
79 * @flush wait until any pending handlers have completed before returning.
81 void host1x_intr_put_ref(struct host1x *host, unsigned int id, void *ref,
84 /* Initialize host1x sync point interrupt */
85 int host1x_intr_init(struct host1x *host, unsigned int irq_sync);
87 /* Deinitialize host1x sync point interrupt */
88 void host1x_intr_deinit(struct host1x *host);
90 /* Enable host1x sync point interrupt */
91 void host1x_intr_start(struct host1x *host);
93 /* Disable host1x sync point interrupt */
94 void host1x_intr_stop(struct host1x *host);
96 irqreturn_t host1x_syncpt_thresh_fn(void *dev_id);