blob: 2b8adf016a05b0fe3cbec0cc9cdb49e2da88ea3b [file] [log] [blame]
Terje Bergstrom7ede0b02013-03-22 16:34:02 +02001/*
2 * Tegra host1x Interrupt Management
3 *
4 * Copyright (c) 2010-2013, NVIDIA Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19#ifndef __HOST1X_INTR_H
20#define __HOST1X_INTR_H
21
22#include <linux/interrupt.h>
23#include <linux/workqueue.h>
24
25struct host1x;
26
27enum host1x_intr_action {
28 /*
Terje Bergstrom65793242013-03-22 16:34:03 +020029 * Perform cleanup after a submit has completed.
30 * 'data' points to a channel
31 */
32 HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0,
33
34 /*
Terje Bergstrom7ede0b02013-03-22 16:34:02 +020035 * Wake up a task.
36 * 'data' points to a wait_queue_head_t
37 */
38 HOST1X_INTR_ACTION_WAKEUP,
39
40 /*
41 * Wake up a interruptible task.
42 * 'data' points to a wait_queue_head_t
43 */
44 HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
45
46 HOST1X_INTR_ACTION_COUNT
47};
48
49struct host1x_syncpt_intr {
50 spinlock_t lock;
51 struct list_head wait_head;
52 char thresh_irq_name[12];
53 struct work_struct work;
54};
55
56struct host1x_waitlist {
57 struct list_head list;
58 struct kref refcount;
59 u32 thresh;
60 enum host1x_intr_action action;
61 atomic_t state;
62 void *data;
63 int count;
64};
65
66/*
67 * Schedule an action to be taken when a sync point reaches the given threshold.
68 *
69 * @id the sync point
70 * @thresh the threshold
71 * @action the action to take
72 * @data a pointer to extra data depending on action, see above
73 * @waiter waiter structure - assumes ownership
74 * @ref must be passed if cancellation is possible, else NULL
75 *
76 * This is a non-blocking api.
77 */
78int host1x_intr_add_action(struct host1x *host, u32 id, u32 thresh,
79 enum host1x_intr_action action, void *data,
80 struct host1x_waitlist *waiter, void **ref);
81
82/*
83 * Unreference an action submitted to host1x_intr_add_action().
84 * You must call this if you passed non-NULL as ref.
85 * @ref the ref returned from host1x_intr_add_action()
86 */
87void host1x_intr_put_ref(struct host1x *host, u32 id, void *ref);
88
89/* Initialize host1x sync point interrupt */
90int host1x_intr_init(struct host1x *host, unsigned int irq_sync);
91
92/* Deinitialize host1x sync point interrupt */
93void host1x_intr_deinit(struct host1x *host);
94
95/* Enable host1x sync point interrupt */
96void host1x_intr_start(struct host1x *host);
97
98/* Disable host1x sync point interrupt */
99void host1x_intr_stop(struct host1x *host);
100
101irqreturn_t host1x_syncpt_thresh_fn(void *dev_id);
102#endif