forked from rrcarlosr/Jetpack
184 lines
5.1 KiB
C
184 lines
5.1 KiB
C
/*
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* drivers/video/tegra/host/nvhost_intr.h
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*
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* Tegra Graphics Host Interrupt Management
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*
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* Copyright (c) 2010-2017, NVIDIA Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __NVHOST_INTR_H
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#define __NVHOST_INTR_H
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#include <linux/kthread.h>
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#include <linux/semaphore.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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#include <linux/version.h>
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#if LINUX_VERSION_CODE > KERNEL_VERSION(4, 13, 0)
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#include <linux/wait.h>
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#endif
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#include "nvhost_ktime.h"
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struct nvhost_channel;
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struct platform_device;
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enum nvhost_intr_action {
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/**
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* Signal a nvhost_sync_pt.
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* 'data' points to a nvhost_sync_pt
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*/
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NVHOST_INTR_ACTION_SIGNAL_SYNC_PT = 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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NVHOST_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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NVHOST_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
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/**
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* Fast notifier event
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* 'data' points to a callback and private data through internal
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* structure
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*/
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NVHOST_INTR_ACTION_FAST_NOTIFY,
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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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NVHOST_INTR_ACTION_SUBMIT_COMPLETE,
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/**
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* Notify some external function about completion
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* 'data' holds pointer to an internal structure that holds a
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* function pointer and the stored private data
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*/
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NVHOST_INTR_ACTION_NOTIFY,
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NVHOST_INTR_ACTION_COUNT
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};
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#define NVHOST_INTR_HIGH_PRIO_COUNT NVHOST_INTR_ACTION_SUBMIT_COMPLETE
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#define NVHOST_INTR_LOW_PRIO_COUNT \
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(NVHOST_INTR_ACTION_COUNT - NVHOST_INTR_HIGH_PRIO_COUNT)
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struct nvhost_intr;
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struct nvhost_waitlist {
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struct nvhost_master *host;
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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 nvhost_intr_action action;
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atomic_t state;
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struct nvhost_timespec isr_recv;
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void *data;
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int count;
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wait_queue_head_t wq;
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};
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struct nvhost_waitlist_external_notifier {
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struct nvhost_master *master;
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void (*callback)(void *, int);
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void *private_data;
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bool reuse;
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};
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struct nvhost_intr_syncpt {
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struct nvhost_intr *intr;
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u32 id;
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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 nvhost_timespec isr_recv;
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struct work_struct low_prio_work;
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struct list_head low_prio_handlers[NVHOST_INTR_LOW_PRIO_COUNT];
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};
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struct nvhost_intr {
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struct nvhost_intr_syncpt *syncpt;
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struct mutex mutex;
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int general_irq;
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int syncpt_irq;
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u32 intstatus;
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void (*host_isr[32])(u32, void*);
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void *host_isr_priv[32];
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struct workqueue_struct *low_prio_wq;
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};
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#define intr_to_dev(x) container_of(x, struct nvhost_master, intr)
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#define intr_syncpt_to_intr(is) (is->intr)
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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 allocated with nvhost_intr_alloc_waiter - 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 nvhost_intr_add_action(struct nvhost_intr *intr, u32 id, u32 thresh,
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enum nvhost_intr_action action, void *data,
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void *waiter,
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void **ref);
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bool nvhost_intr_has_pending_jobs(struct nvhost_intr *intr, u32 id,
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void *exlude_data);
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/**
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* Allocate a waiter.
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*/
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void *nvhost_intr_alloc_waiter(void);
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/**
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* Unreference an action submitted to nvhost_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 nvhost_intr_add_action()
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*/
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void nvhost_intr_put_ref(struct nvhost_intr *intr, u32 id, void *ref);
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int nvhost_intr_init(struct nvhost_intr *intr, u32 irq_gen, u32 irq_sync);
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void nvhost_intr_deinit(struct nvhost_intr *intr);
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int nvhost_intr_start(struct nvhost_intr *intr, u32 hz);
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int nvhost_intr_stop(struct nvhost_intr *intr);
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int nvhost_intr_release_time(void *ref, struct nvhost_timespec *ts);
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void nvhost_intr_enable_host_irq(struct nvhost_intr *intr, int irq,
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void (*host_isr)(u32, void *),
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void *priv);
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void nvhost_intr_disable_host_irq(struct nvhost_intr *intr, int irq);
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void nvhost_intr_enable_module_intr(struct nvhost_intr *intr, int module_irq);
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void nvhost_intr_disable_module_intr(struct nvhost_intr *intr, int module_irq);
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void nvhost_syncpt_thresh_fn(void *dev_id);
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irqreturn_t nvhost_intr_irq_fn(int irq, void *dev_id);
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#if defined(CONFIG_TEGRA_GRHOST_SCALE)
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void nvhost_scale_actmon_irq(struct platform_device *pdev, int type);
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#else
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static inline void nvhost_scale_actmon_irq(struct platform_device *pdev,
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int type) { }
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#endif
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#endif
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