// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) Rockchip Electronics Co., Ltd.
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*
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* Author: Huang Lee <Putin.li@rock-chips.com>
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*/
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#define pr_fmt(fmt) "rve_fence: " fmt
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#include <linux/dma-fence.h>
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#include <linux/sync_file.h>
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#include <linux/slab.h>
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#include "rve_fence.h"
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static const char *rve_fence_get_name(struct dma_fence *fence)
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{
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return DRIVER_NAME;
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}
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static const struct dma_fence_ops rve_fence_ops = {
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.get_driver_name = rve_fence_get_name,
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.get_timeline_name = rve_fence_get_name,
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};
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struct rve_fence_context *rve_fence_context_alloc(void)
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{
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struct rve_fence_context *fence_ctx = NULL;
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fence_ctx = kzalloc(sizeof(*fence_ctx), GFP_KERNEL);
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if (!fence_ctx)
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return ERR_PTR(-ENOMEM);
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fence_ctx->context = dma_fence_context_alloc(1);
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spin_lock_init(&fence_ctx->spinlock);
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return fence_ctx;
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}
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void rve_fence_context_free(struct rve_fence_context *fence_ctx)
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{
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kfree(fence_ctx);
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}
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int rve_out_fence_alloc(struct rve_job *job)
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{
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struct rve_fence_context *fence_ctx = rve_drvdata->fence_ctx;
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struct dma_fence *fence = NULL;
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fence = kzalloc(sizeof(*fence), GFP_KERNEL);
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if (!fence)
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return -ENOMEM;
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dma_fence_init(fence, &rve_fence_ops, &job->fence_lock,
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fence_ctx->context, ++fence_ctx->seqno);
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job->out_fence = fence;
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return 0;
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}
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int rve_out_fence_get_fd(struct rve_job *job)
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{
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struct sync_file *sync_file = NULL;
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int fence_fd = -1;
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if (!job->out_fence)
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return -EINVAL;
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fence_fd = get_unused_fd_flags(O_CLOEXEC);
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if (fence_fd < 0)
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return fence_fd;
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sync_file = sync_file_create(job->out_fence);
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if (!sync_file)
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return -ENOMEM;
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fd_install(fence_fd, sync_file->file);
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return fence_fd;
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}
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struct dma_fence *rve_get_input_fence(int in_fence_fd)
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{
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struct dma_fence *in_fence;
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in_fence = sync_file_get_fence(in_fence_fd);
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if (!in_fence)
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pr_err("can not get in-fence from fd\n");
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return in_fence;
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}
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int rve_wait_input_fence(struct dma_fence *in_fence)
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{
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int ret = 0;
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ret = dma_fence_wait(in_fence, true);
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dma_fence_put(in_fence);
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return ret;
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}
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int rve_add_dma_fence_callback(struct rve_job *job, struct dma_fence *in_fence,
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dma_fence_func_t func)
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{
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struct rve_fence_waiter *waiter;
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int ret;
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waiter = kmalloc(sizeof(*waiter), GFP_KERNEL);
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if (!waiter) {
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pr_err("%s: Failed to allocate waiter\n", __func__);
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return -ENOMEM;
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}
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waiter->job = job;
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ret = dma_fence_add_callback(in_fence, &waiter->waiter, func);
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if (ret == -ENOENT) {
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pr_err("'input fence' has been already signaled.");
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goto err_free_waiter;
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} else if (ret == -EINVAL) {
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pr_err
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("%s: failed to add callback to dma_fence, err: %d\n",
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__func__, ret);
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goto err_free_waiter;
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}
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return ret;
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err_free_waiter:
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kfree(waiter);
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return ret;
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}
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