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cc5bcef3f6
Add the upstream host1x driver with the 'Host1x/Tegra UAPI' series [0] applied. This driver will be built as an external module for use with the NVGPU driver on upstream Linux kernels. The following modifications have been made to the series posted upstream 1. Update the Makefile to always build the driver as a module 2. Remove the tests to see if CONFIG_DRM_TEGRA_STAGING is enabled 3. Rename the include/linux/host1x.h to include/linux/host1x-next.h to avoid conflicts with upstream headers when building as an external module. 4. Rename the include/uapi/linux/host1x.h to include/uapi/linux/host1x-next.h to avoid conflicts with upstream headers when building as an external module. 5. Rename the module that is built to be host1x-next.ko instead of host1x.ko to avoid any depmod conflicts with the upstream driver. [0] https://patchwork.ozlabs.org/project/linux-tegra/list/?series=215770 Bug 3156385 Change-Id: Ic60299546809097dd0e4a9a7157bce1491d9f794 Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2435801 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
96 lines
2.2 KiB
C
96 lines
2.2 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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*/
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void host1x_intr_put_ref(struct host1x *host, unsigned int id, void *ref);
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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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