/* SPDX-License-Identifier: GPL-2.0-only */ /* * Omnitek Scatter-Gather DMA Controller * * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates. * All rights reserved. */ #ifndef COBALT_OMNITEK_H #define COBALT_OMNITEK_H #include <linux/scatterlist.h> #include "cobalt-driver.h" struct sg_dma_descriptor { u32 pci_l; u32 pci_h; u32 local; u32 reserved0; u32 next_l; u32 next_h; u32 bytes; u32 reserved1; }; int omni_sg_dma_init(struct cobalt *cobalt); void omni_sg_dma_abort_channel(struct cobalt_stream *s); void omni_sg_dma_start(struct cobalt_stream *s, struct sg_dma_desc_info *desc); bool is_dma_done(struct cobalt_stream *s); int descriptor_list_create(struct cobalt *cobalt, struct scatterlist *scatter_list, bool to_pci, unsigned sglen, unsigned size, unsigned width, unsigned stride, struct sg_dma_desc_info *desc); void descriptor_list_chain(struct sg_dma_desc_info *this, struct sg_dma_desc_info *next); void descriptor_list_loopback(struct sg_dma_desc_info *desc); void descriptor_list_end_of_chain(struct sg_dma_desc_info *desc); void *descriptor_list_allocate(struct sg_dma_desc_info *desc, size_t bytes); void descriptor_list_free(struct sg_dma_desc_info *desc); void descriptor_list_interrupt_enable(struct sg_dma_desc_info *desc); void descriptor_list_interrupt_disable(struct sg_dma_desc_info *desc); #endif