| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 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 | |
| 25 | struct host1x; |
| 26 | |
| 27 | enum host1x_intr_action { |
| 28 | /* |
| 29 | * Perform cleanup after a submit has completed. |
| 30 | * 'data' points to a channel |
| 31 | */ |
| 32 | HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0, |
| 33 | |
| 34 | /* |
| 35 | * 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 | |
| 49 | struct 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 | |
| 56 | struct 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 | */ |
| 78 | int 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 | */ |
| 87 | void host1x_intr_put_ref(struct host1x *host, u32 id, void *ref); |
| 88 | |
| 89 | /* Initialize host1x sync point interrupt */ |
| 90 | int host1x_intr_init(struct host1x *host, unsigned int irq_sync); |
| 91 | |
| 92 | /* Deinitialize host1x sync point interrupt */ |
| 93 | void host1x_intr_deinit(struct host1x *host); |
| 94 | |
| 95 | /* Enable host1x sync point interrupt */ |
| 96 | void host1x_intr_start(struct host1x *host); |
| 97 | |
| 98 | /* Disable host1x sync point interrupt */ |
| 99 | void host1x_intr_stop(struct host1x *host); |
| 100 | |
| 101 | irqreturn_t host1x_syncpt_thresh_fn(void *dev_id); |
| 102 | #endif |