Release 4.11 drivers/dma-buf/dma-fence-array.c
/*
* dma-fence-array: aggregate fences to be waited together
*
* Copyright (C) 2016 Collabora Ltd
* Copyright (C) 2016 Advanced Micro Devices, Inc.
* Authors:
* Gustavo Padovan <gustavo@padovan.org>
* Christian König <christian.koenig@amd.com>
*
* 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.
*/
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/dma-fence-array.h>
static const char *dma_fence_array_get_driver_name(struct dma_fence *fence)
{
return "dma_fence_array";
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 13 | 81.25% | 1 | 50.00% |
| Chris Wilson | 3 | 18.75% | 1 | 50.00% |
| Total | 16 | 100.00% | 2 | 100.00% |
static const char *dma_fence_array_get_timeline_name(struct dma_fence *fence)
{
return "unbound";
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 14 | 87.50% | 1 | 50.00% |
| Chris Wilson | 2 | 12.50% | 1 | 50.00% |
| Total | 16 | 100.00% | 2 | 100.00% |
static void dma_fence_array_cb_func(struct dma_fence *f,
struct dma_fence_cb *cb)
{
struct dma_fence_array_cb *array_cb =
container_of(cb, struct dma_fence_array_cb, cb);
struct dma_fence_array *array = array_cb->array;
if (atomic_dec_and_test(&array->num_pending))
dma_fence_signal(&array->base);
dma_fence_put(&array->base);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 51 | 77.27% | 1 | 33.33% |
| Chris Wilson | 8 | 12.12% | 1 | 33.33% |
| Christian König | 7 | 10.61% | 1 | 33.33% |
| Total | 66 | 100.00% | 3 | 100.00% |
static bool dma_fence_array_enable_signaling(struct dma_fence *fence)
{
struct dma_fence_array *array = to_dma_fence_array(fence);
struct dma_fence_array_cb *cb = (void *)(&array[1]);
unsigned i;
for (i = 0; i < array->num_fences; ++i) {
cb[i].array = array;
/*
* As we may report that the fence is signaled before all
* callbacks are complete, we need to take an additional
* reference count on the array so that we do not free it too
* early. The core fence handling will only hold the reference
* until we signal the array as complete (but that is now
* insufficient).
*/
dma_fence_get(&array->base);
if (dma_fence_add_callback(array->fences[i], &cb[i].cb,
dma_fence_array_cb_func)) {
dma_fence_put(&array->base);
if (atomic_dec_and_test(&array->num_pending))
return false;
}
}
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 98 | 79.03% | 1 | 33.33% |
| Christian König | 17 | 13.71% | 1 | 33.33% |
| Chris Wilson | 9 | 7.26% | 1 | 33.33% |
| Total | 124 | 100.00% | 3 | 100.00% |
static bool dma_fence_array_signaled(struct dma_fence *fence)
{
struct dma_fence_array *array = to_dma_fence_array(fence);
return atomic_read(&array->num_pending) <= 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 27 | 84.38% | 1 | 33.33% |
| Chris Wilson | 4 | 12.50% | 1 | 33.33% |
| Christian König | 1 | 3.12% | 1 | 33.33% |
| Total | 32 | 100.00% | 3 | 100.00% |
static void dma_fence_array_release(struct dma_fence *fence)
{
struct dma_fence_array *array = to_dma_fence_array(fence);
unsigned i;
for (i = 0; i < array->num_fences; ++i)
dma_fence_put(array->fences[i]);
kfree(array->fences);
dma_fence_free(fence);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 55 | 90.16% | 1 | 50.00% |
| Chris Wilson | 6 | 9.84% | 1 | 50.00% |
| Total | 61 | 100.00% | 2 | 100.00% |
const struct dma_fence_ops dma_fence_array_ops = {
.get_driver_name = dma_fence_array_get_driver_name,
.get_timeline_name = dma_fence_array_get_timeline_name,
.enable_signaling = dma_fence_array_enable_signaling,
.signaled = dma_fence_array_signaled,
.wait = dma_fence_default_wait,
.release = dma_fence_array_release,
};
EXPORT_SYMBOL(dma_fence_array_ops);
/**
* dma_fence_array_create - Create a custom fence array
* @num_fences: [in] number of fences to add in the array
* @fences: [in] array containing the fences
* @context: [in] fence context to use
* @seqno: [in] sequence number to use
* @signal_on_any: [in] signal on any fence in the array
*
* Allocate a dma_fence_array object and initialize the base fence with
* dma_fence_init().
* In case of error it returns NULL.
*
* The caller should allocate the fences array with num_fences size
* and fill it with the fences it wants to add to the object. Ownership of this
* array is taken and dma_fence_put() is used on each fence on release.
*
* If @signal_on_any is true the fence array signals if any fence in the array
* signals, otherwise it signals when all fences in the array signal.
*/
struct dma_fence_array *dma_fence_array_create(int num_fences,
struct dma_fence **fences,
u64 context, unsigned seqno,
bool signal_on_any)
{
struct dma_fence_array *array;
size_t size = sizeof(*array);
/* Allocate the callback structures behind the array. */
size += num_fences * sizeof(struct dma_fence_array_cb);
array = kzalloc(size, GFP_KERNEL);
if (!array)
return NULL;
spin_lock_init(&array->lock);
dma_fence_init(&array->base, &dma_fence_array_ops, &array->lock,
context, seqno);
array->num_fences = num_fences;
atomic_set(&array->num_pending, signal_on_any ? 1 : num_fences);
array->fences = fences;
return array;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 110 | 88.71% | 1 | 33.33% |
| Christian König | 7 | 5.65% | 1 | 33.33% |
| Chris Wilson | 7 | 5.65% | 1 | 33.33% |
| Total | 124 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(dma_fence_array_create);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Gustavo Fernando Padovan | 413 | 83.10% | 2 | 50.00% |
| Chris Wilson | 52 | 10.46% | 1 | 25.00% |
| Christian König | 32 | 6.44% | 1 | 25.00% |
| Total | 497 | 100.00% | 4 | 100.00% |
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