forked from Minki/linux
687db2207b
Add an implementation of dma_fences based on syncpoints. Syncpoint interrupts are used to signal fences. Additionally, after software signaling has been enabled, a 30 second timeout is started. If the syncpoint threshold is not reached within this period, the fence is signalled with an -ETIMEDOUT error code. This is to allow fences that would never reach their syncpoint threshold to be cleaned up. The timeout can potentially be removed in the future after job tracking code has been refactored. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/* 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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