diff options
Diffstat (limited to 'drivers/gpu/host1x/intr.h')
| -rw-r--r-- | drivers/gpu/host1x/intr.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/intr.h b/drivers/gpu/host1x/intr.h new file mode 100644 index 000000000..2b8adf016 --- /dev/null +++ b/drivers/gpu/host1x/intr.h @@ -0,0 +1,102 @@ +/* + * Tegra host1x Interrupt Management + * + * Copyright (c) 2010-2013, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __HOST1X_INTR_H +#define __HOST1X_INTR_H + +#include <linux/interrupt.h> +#include <linux/workqueue.h> + +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, u32 id, 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, u32 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 |