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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Omnitek Scatter-Gather DMA Controller4 *5 * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.6 * All rights reserved.7 */8 9#ifndef COBALT_OMNITEK_H10#define COBALT_OMNITEK_H11 12#include <linux/scatterlist.h>13#include "cobalt-driver.h"14 15struct sg_dma_descriptor {16 u32 pci_l;17 u32 pci_h;18 19 u32 local;20 u32 reserved0;21 22 u32 next_l;23 u32 next_h;24 25 u32 bytes;26 u32 reserved1;27};28 29int omni_sg_dma_init(struct cobalt *cobalt);30void omni_sg_dma_abort_channel(struct cobalt_stream *s);31void omni_sg_dma_start(struct cobalt_stream *s, struct sg_dma_desc_info *desc);32bool is_dma_done(struct cobalt_stream *s);33 34int descriptor_list_create(struct cobalt *cobalt,35 struct scatterlist *scatter_list, bool to_pci, unsigned sglen,36 unsigned size, unsigned width, unsigned stride,37 struct sg_dma_desc_info *desc);38 39void descriptor_list_chain(struct sg_dma_desc_info *this,40 struct sg_dma_desc_info *next);41void descriptor_list_loopback(struct sg_dma_desc_info *desc);42void descriptor_list_end_of_chain(struct sg_dma_desc_info *desc);43 44void *descriptor_list_allocate(struct sg_dma_desc_info *desc, size_t bytes);45void descriptor_list_free(struct sg_dma_desc_info *desc);46 47void descriptor_list_interrupt_enable(struct sg_dma_desc_info *desc);48void descriptor_list_interrupt_disable(struct sg_dma_desc_info *desc);49 50#endif51