// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Copyright (C) Rockchip Electronics Co., Ltd.
|
*
|
* Author: Huang Lee <Putin.li@rock-chips.com>
|
*/
|
|
#define pr_fmt(fmt) "rga_fence: " fmt
|
|
#include <linux/dma-fence.h>
|
#include <linux/sync_file.h>
|
#include <linux/slab.h>
|
|
#include "rga_drv.h"
|
#include "rga_fence.h"
|
|
static const char *rga_fence_get_name(struct dma_fence *fence)
|
{
|
return DRIVER_NAME;
|
}
|
|
static const struct dma_fence_ops rga_fence_ops = {
|
.get_driver_name = rga_fence_get_name,
|
.get_timeline_name = rga_fence_get_name,
|
};
|
|
int rga_fence_context_init(struct rga_fence_context **ctx)
|
{
|
struct rga_fence_context *fence_ctx = NULL;
|
|
fence_ctx = kzalloc(sizeof(struct rga_fence_context), GFP_KERNEL);
|
if (!fence_ctx) {
|
pr_err("can not kzalloc for rga_fence_context!\n");
|
return -ENOMEM;
|
}
|
|
fence_ctx->context = dma_fence_context_alloc(1);
|
spin_lock_init(&fence_ctx->spinlock);
|
|
*ctx = fence_ctx;
|
|
return 0;
|
}
|
|
void rga_fence_context_remove(struct rga_fence_context **ctx)
|
{
|
if (*ctx == NULL)
|
return;
|
|
kfree(*ctx);
|
*ctx = NULL;
|
}
|
|
struct dma_fence *rga_dma_fence_alloc(void)
|
{
|
struct rga_fence_context *fence_ctx = rga_drvdata->fence_ctx;
|
struct dma_fence *fence = NULL;
|
|
if (fence_ctx == NULL) {
|
pr_err("fence_context is NULL!\n");
|
return ERR_PTR(-EINVAL);
|
}
|
|
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
|
if (!fence)
|
return ERR_PTR(-ENOMEM);
|
|
dma_fence_init(fence, &rga_fence_ops, &fence_ctx->spinlock,
|
fence_ctx->context, ++fence_ctx->seqno);
|
|
return fence;
|
}
|
|
int rga_dma_fence_get_fd(struct dma_fence *fence)
|
{
|
struct sync_file *sync_file = NULL;
|
int fence_fd = -1;
|
|
if (!fence)
|
return -EINVAL;
|
|
fence_fd = get_unused_fd_flags(O_CLOEXEC);
|
if (fence_fd < 0)
|
return fence_fd;
|
|
sync_file = sync_file_create(fence);
|
if (!sync_file)
|
return -ENOMEM;
|
|
fd_install(fence_fd, sync_file->file);
|
|
return fence_fd;
|
}
|
|
struct dma_fence *rga_get_dma_fence_from_fd(int fence_fd)
|
{
|
struct dma_fence *fence;
|
|
fence = sync_file_get_fence(fence_fd);
|
if (!fence)
|
pr_err("can not get fence from fd\n");
|
|
return fence;
|
}
|
|
int rga_dma_fence_wait(struct dma_fence *fence)
|
{
|
int ret = 0;
|
|
ret = dma_fence_wait(fence, true);
|
|
dma_fence_put(fence);
|
|
return ret;
|
}
|
|
int rga_dma_fence_add_callback(struct dma_fence *fence, dma_fence_func_t func, void *private)
|
{
|
int ret;
|
struct rga_fence_waiter *waiter = NULL;
|
|
waiter = kmalloc(sizeof(*waiter), GFP_KERNEL);
|
if (!waiter) {
|
pr_err("%s: Failed to allocate waiter\n", __func__);
|
return -ENOMEM;
|
}
|
|
waiter->private = private;
|
|
ret = dma_fence_add_callback(fence, &waiter->waiter, func);
|
if (ret == -ENOENT) {
|
pr_err("'input fence' has been already signaled.");
|
goto err_free_waiter;
|
} else if (ret == -EINVAL) {
|
pr_err("%s: failed to add callback to dma_fence, err: %d\n", __func__, ret);
|
goto err_free_waiter;
|
}
|
|
return ret;
|
|
err_free_waiter:
|
kfree(waiter);
|
return ret;
|
}
|
