cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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intr.h (2390B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Tegra host1x Interrupt Management
      4 *
      5 * Copyright (c) 2010-2013, NVIDIA Corporation.
      6 */
      7
      8#ifndef __HOST1X_INTR_H
      9#define __HOST1X_INTR_H
     10
     11#include <linux/interrupt.h>
     12#include <linux/workqueue.h>
     13
     14struct host1x_syncpt;
     15struct host1x;
     16
     17enum host1x_intr_action {
     18	/*
     19	 * Perform cleanup after a submit has completed.
     20	 * 'data' points to a channel
     21	 */
     22	HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0,
     23
     24	/*
     25	 * Wake up a  task.
     26	 * 'data' points to a wait_queue_head_t
     27	 */
     28	HOST1X_INTR_ACTION_WAKEUP,
     29
     30	/*
     31	 * Wake up a interruptible task.
     32	 * 'data' points to a wait_queue_head_t
     33	 */
     34	HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
     35
     36	HOST1X_INTR_ACTION_SIGNAL_FENCE,
     37
     38	HOST1X_INTR_ACTION_COUNT
     39};
     40
     41struct host1x_syncpt_intr {
     42	spinlock_t lock;
     43	struct list_head wait_head;
     44	char thresh_irq_name[12];
     45	struct work_struct work;
     46};
     47
     48struct host1x_waitlist {
     49	struct list_head list;
     50	struct kref refcount;
     51	u32 thresh;
     52	enum host1x_intr_action action;
     53	atomic_t state;
     54	void *data;
     55	int count;
     56};
     57
     58/*
     59 * Schedule an action to be taken when a sync point reaches the given threshold.
     60 *
     61 * @id the sync point
     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
     67 *
     68 * This is a non-blocking api.
     69 */
     70int 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,
     73			   void **ref);
     74
     75/*
     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.
     80 */
     81void host1x_intr_put_ref(struct host1x *host, unsigned int id, void *ref,
     82			 bool flush);
     83
     84/* Initialize host1x sync point interrupt */
     85int host1x_intr_init(struct host1x *host, unsigned int irq_sync);
     86
     87/* Deinitialize host1x sync point interrupt */
     88void host1x_intr_deinit(struct host1x *host);
     89
     90/* Enable host1x sync point interrupt */
     91void host1x_intr_start(struct host1x *host);
     92
     93/* Disable host1x sync point interrupt */
     94void host1x_intr_stop(struct host1x *host);
     95
     96irqreturn_t host1x_syncpt_thresh_fn(void *dev_id);
     97#endif