111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __GDC_API_H__
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#define __GDC_API_H__
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#define WORD_SIZE 16
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#define WORD_MASK (~(WORD_SIZE - 1))
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#define AXI_WORD_ALIGN(size) ((size + WORD_SIZE - 1) & WORD_MASK)
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enum dma_data_direction {
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DMA_BIDIRECTIONAL = 0,
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DMA_TO_DEVICE = 1,
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DMA_FROM_DEVICE = 2,
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DMA_NONE = 3,
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};
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typedef unsigned int uint32_t;
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/* for gdc dma buf define */
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struct dmabuf_req_s {
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int index;
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unsigned int len;
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unsigned int dma_dir;
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};
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struct dmabuf_exp_s {
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int index;
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unsigned int flags;
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int fd;
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};
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/* end of gdc dma buffer define */
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#define GDC_IOC_MAGIC 'G'
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#define GDC_REQUEST_DMA_BUFF _IOW(GDC_IOC_MAGIC, 0x06, struct dmabuf_req_s)
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#define GDC_EXP_DMA_BUFF _IOW(GDC_IOC_MAGIC, 0x07, struct dmabuf_exp_s)
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#define GDC_FREE_DMA_BUFF _IOW(GDC_IOC_MAGIC, 0x08, int)
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#define GDC_SYNC_DEVICE _IOW(GDC_IOC_MAGIC, 0x09, int)
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#define GDC_SYNC_CPU _IOW(GDC_IOC_MAGIC, 0x0a, int)
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enum {
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INPUT_BUFF_TYPE = 0x1000,
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OUTPUT_BUFF_TYPE,
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CONFIG_BUFF_TYPE,
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GDC_BUFF_TYPE_MAX
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};
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struct usr_ctx_s {
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//TODO currently donot support multi-context
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int gdc_client;
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char *i_buff[3];
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char *o_buff;
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char *c_buff;
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unsigned long i_len[3];
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unsigned long o_len;
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unsigned long c_len;
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int fd[3];
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int inbuf_num;
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};
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/**
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* This function create a contex for gdc work.
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*
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* @param ctx - contains client of gdc and ion.
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*
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* @return 0 - success
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* -1 - fail
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*/
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int create_ctx(struct usr_ctx_s *ctx);
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/**
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* This function points gdc to its input resolution and yuv address and offsets
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*
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* @param gdc_settings - overall gdc settings
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* @param in_buf_fd - input buffer's fd
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* @param out_buf_fd - output buffer's fd
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*
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* @return 0 - success
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* -1 - no interrupt from GDC.
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*/
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int destroy_ctx(struct usr_ctx_s *ctx);
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/**
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* This function points gdc to its input resolution and yuv address and offsets
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*
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* @param ctx - contains client of gdc and ion.
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* @param share_fd - buffer's fd
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* @param len - buffer's size
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*
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* @return 0 - success
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* -1 - no interrupt from GDC.
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*/
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int alloc_dma_buffer (struct usr_ctx_s *ctx,
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uint32_t type, size_t len);
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int sync_cpu(struct usr_ctx_s *ctx);
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#endif
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