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/*
*
* (C) COPYRIGHT 2011-2017 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include <linux/atomic.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <mali_kbase_fence_defs.h>
#include <mali_kbase_fence.h>
#include <mali_kbase.h>
/* Spin lock protecting all Mali fences as fence->lock. */
static DEFINE_SPINLOCK(kbase_fence_lock);
static const char *
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
kbase_fence_get_driver_name(struct fence *fence)
#else
kbase_fence_get_driver_name(struct dma_fence *fence)
#endif
{
return kbase_drv_name;
}
static const char *
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
kbase_fence_get_timeline_name(struct fence *fence)
#else
kbase_fence_get_timeline_name(struct dma_fence *fence)
#endif
{
return kbase_timeline_name;
}
static bool
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
kbase_fence_enable_signaling(struct fence *fence)
#else
kbase_fence_enable_signaling(struct dma_fence *fence)
#endif
{
return true;
}
static void
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
kbase_fence_fence_value_str(struct fence *fence, char *str, int size)
#else
kbase_fence_fence_value_str(struct dma_fence *fence, char *str, int size)
#endif
{
snprintf(str, size, "%u", fence->seqno);
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
const struct fence_ops kbase_fence_ops = {
.wait = fence_default_wait,
#else
const struct dma_fence_ops kbase_fence_ops = {
.wait = dma_fence_default_wait,
#endif
.get_driver_name = kbase_fence_get_driver_name,
.get_timeline_name = kbase_fence_get_timeline_name,
.enable_signaling = kbase_fence_enable_signaling,
.fence_value_str = kbase_fence_fence_value_str
};
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
struct fence *
kbase_fence_out_new(struct kbase_jd_atom *katom)
#else
struct dma_fence *
kbase_fence_out_new(struct kbase_jd_atom *katom)
#endif
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
struct fence *fence;
#else
struct dma_fence *fence;
#endif
WARN_ON(katom->dma_fence.fence);
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
if (!fence)
return NULL;
dma_fence_init(fence,
&kbase_fence_ops,
&kbase_fence_lock,
katom->dma_fence.context,
atomic_inc_return(&katom->dma_fence.seqno));
katom->dma_fence.fence = fence;
return fence;
}
bool
kbase_fence_free_callbacks(struct kbase_jd_atom *katom)
{
struct kbase_fence_cb *cb, *tmp;
bool res = false;
lockdep_assert_held(&katom->kctx->jctx.lock);
/* Clean up and free callbacks. */
list_for_each_entry_safe(cb, tmp, &katom->dma_fence.callbacks, node) {
bool ret;
/* Cancel callbacks that hasn't been called yet. */
ret = dma_fence_remove_callback(cb->fence, &cb->fence_cb);
if (ret) {
int ret;
/* Fence had not signaled, clean up after
* canceling.
*/
ret = atomic_dec_return(&katom->dma_fence.dep_count);
if (unlikely(ret == 0))
res = true;
}
/*
* Release the reference taken in
* kbase_fence_add_callback().
*/
dma_fence_put(cb->fence);
list_del(&cb->node);
kfree(cb);
}
return res;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0))
int
kbase_fence_add_callback(struct kbase_jd_atom *katom,
struct fence *fence,
fence_func_t callback)
#else
int
kbase_fence_add_callback(struct kbase_jd_atom *katom,
struct dma_fence *fence,
dma_fence_func_t callback)
#endif
{
int err = 0;
struct kbase_fence_cb *kbase_fence_cb;
if (!fence)
return -EINVAL;
kbase_fence_cb = kmalloc(sizeof(*kbase_fence_cb), GFP_KERNEL);
if (!kbase_fence_cb)
return -ENOMEM;
kbase_fence_cb->fence = fence;
kbase_fence_cb->katom = katom;
INIT_LIST_HEAD(&kbase_fence_cb->node);
err = dma_fence_add_callback(fence, &kbase_fence_cb->fence_cb,
callback);
if (err == -ENOENT) {
/* Fence signaled, clear the error and return */
err = 0;
kfree(kbase_fence_cb);
} else if (err) {
kfree(kbase_fence_cb);
} else {
/*
* Get reference to fence that will be kept until callback gets
* cleaned up in kbase_fence_free_callbacks().
*/
dma_fence_get(fence);
atomic_inc(&katom->dma_fence.dep_count);
/* Add callback to katom's list of callbacks */
list_add(&kbase_fence_cb->node, &katom->dma_fence.callbacks);
}
return err;
}
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