mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 18:39:59 +00:00
caab277b1d
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
138 lines
3 KiB
C
138 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2013-2016 Red Hat
|
|
* Author: Rob Clark <robdclark@gmail.com>
|
|
*/
|
|
|
|
#include <linux/dma-fence.h>
|
|
|
|
#include "msm_drv.h"
|
|
#include "msm_fence.h"
|
|
|
|
|
|
struct msm_fence_context *
|
|
msm_fence_context_alloc(struct drm_device *dev, const char *name)
|
|
{
|
|
struct msm_fence_context *fctx;
|
|
|
|
fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
|
|
if (!fctx)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
fctx->dev = dev;
|
|
strncpy(fctx->name, name, sizeof(fctx->name));
|
|
fctx->context = dma_fence_context_alloc(1);
|
|
init_waitqueue_head(&fctx->event);
|
|
spin_lock_init(&fctx->spinlock);
|
|
|
|
return fctx;
|
|
}
|
|
|
|
void msm_fence_context_free(struct msm_fence_context *fctx)
|
|
{
|
|
kfree(fctx);
|
|
}
|
|
|
|
static inline bool fence_completed(struct msm_fence_context *fctx, uint32_t fence)
|
|
{
|
|
return (int32_t)(fctx->completed_fence - fence) >= 0;
|
|
}
|
|
|
|
/* legacy path for WAIT_FENCE ioctl: */
|
|
int msm_wait_fence(struct msm_fence_context *fctx, uint32_t fence,
|
|
ktime_t *timeout, bool interruptible)
|
|
{
|
|
int ret;
|
|
|
|
if (fence > fctx->last_fence) {
|
|
DRM_ERROR("%s: waiting on invalid fence: %u (of %u)\n",
|
|
fctx->name, fence, fctx->last_fence);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!timeout) {
|
|
/* no-wait: */
|
|
ret = fence_completed(fctx, fence) ? 0 : -EBUSY;
|
|
} else {
|
|
unsigned long remaining_jiffies = timeout_to_jiffies(timeout);
|
|
|
|
if (interruptible)
|
|
ret = wait_event_interruptible_timeout(fctx->event,
|
|
fence_completed(fctx, fence),
|
|
remaining_jiffies);
|
|
else
|
|
ret = wait_event_timeout(fctx->event,
|
|
fence_completed(fctx, fence),
|
|
remaining_jiffies);
|
|
|
|
if (ret == 0) {
|
|
DBG("timeout waiting for fence: %u (completed: %u)",
|
|
fence, fctx->completed_fence);
|
|
ret = -ETIMEDOUT;
|
|
} else if (ret != -ERESTARTSYS) {
|
|
ret = 0;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* called from workqueue */
|
|
void msm_update_fence(struct msm_fence_context *fctx, uint32_t fence)
|
|
{
|
|
spin_lock(&fctx->spinlock);
|
|
fctx->completed_fence = max(fence, fctx->completed_fence);
|
|
spin_unlock(&fctx->spinlock);
|
|
|
|
wake_up_all(&fctx->event);
|
|
}
|
|
|
|
struct msm_fence {
|
|
struct dma_fence base;
|
|
struct msm_fence_context *fctx;
|
|
};
|
|
|
|
static inline struct msm_fence *to_msm_fence(struct dma_fence *fence)
|
|
{
|
|
return container_of(fence, struct msm_fence, base);
|
|
}
|
|
|
|
static const char *msm_fence_get_driver_name(struct dma_fence *fence)
|
|
{
|
|
return "msm";
|
|
}
|
|
|
|
static const char *msm_fence_get_timeline_name(struct dma_fence *fence)
|
|
{
|
|
struct msm_fence *f = to_msm_fence(fence);
|
|
return f->fctx->name;
|
|
}
|
|
|
|
static bool msm_fence_signaled(struct dma_fence *fence)
|
|
{
|
|
struct msm_fence *f = to_msm_fence(fence);
|
|
return fence_completed(f->fctx, f->base.seqno);
|
|
}
|
|
|
|
static const struct dma_fence_ops msm_fence_ops = {
|
|
.get_driver_name = msm_fence_get_driver_name,
|
|
.get_timeline_name = msm_fence_get_timeline_name,
|
|
.signaled = msm_fence_signaled,
|
|
};
|
|
|
|
struct dma_fence *
|
|
msm_fence_alloc(struct msm_fence_context *fctx)
|
|
{
|
|
struct msm_fence *f;
|
|
|
|
f = kzalloc(sizeof(*f), GFP_KERNEL);
|
|
if (!f)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
f->fctx = fctx;
|
|
|
|
dma_fence_init(&f->base, &msm_fence_ops, &fctx->spinlock,
|
|
fctx->context, ++fctx->last_fence);
|
|
|
|
return &f->base;
|
|
}
|