16884db3cSHans Verkuil /* SPDX-License-Identifier: GPL-2.0-only */ 285756a06SHans Verkuil /* 385756a06SHans Verkuil * Omnitek Scatter-Gather DMA Controller 485756a06SHans Verkuil * 585756a06SHans Verkuil * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates. 685756a06SHans Verkuil * All rights reserved. 785756a06SHans Verkuil */ 885756a06SHans Verkuil 985756a06SHans Verkuil #ifndef COBALT_OMNITEK_H 1085756a06SHans Verkuil #define COBALT_OMNITEK_H 1185756a06SHans Verkuil 1285756a06SHans Verkuil #include <linux/scatterlist.h> 1385756a06SHans Verkuil #include "cobalt-driver.h" 1485756a06SHans Verkuil 1585756a06SHans Verkuil struct sg_dma_descriptor { 1685756a06SHans Verkuil u32 pci_l; 1785756a06SHans Verkuil u32 pci_h; 1885756a06SHans Verkuil 1985756a06SHans Verkuil u32 local; 2085756a06SHans Verkuil u32 reserved0; 2185756a06SHans Verkuil 2285756a06SHans Verkuil u32 next_l; 2385756a06SHans Verkuil u32 next_h; 2485756a06SHans Verkuil 2585756a06SHans Verkuil u32 bytes; 2685756a06SHans Verkuil u32 reserved1; 2785756a06SHans Verkuil }; 2885756a06SHans Verkuil 2985756a06SHans Verkuil int omni_sg_dma_init(struct cobalt *cobalt); 3085756a06SHans Verkuil void omni_sg_dma_abort_channel(struct cobalt_stream *s); 3185756a06SHans Verkuil void omni_sg_dma_start(struct cobalt_stream *s, struct sg_dma_desc_info *desc); 3285756a06SHans Verkuil bool is_dma_done(struct cobalt_stream *s); 3385756a06SHans Verkuil 3485756a06SHans Verkuil int descriptor_list_create(struct cobalt *cobalt, 3585756a06SHans Verkuil struct scatterlist *scatter_list, bool to_pci, unsigned sglen, 3685756a06SHans Verkuil unsigned size, unsigned width, unsigned stride, 3785756a06SHans Verkuil struct sg_dma_desc_info *desc); 3885756a06SHans Verkuil 3985756a06SHans Verkuil void descriptor_list_chain(struct sg_dma_desc_info *this, 4085756a06SHans Verkuil struct sg_dma_desc_info *next); 4185756a06SHans Verkuil void descriptor_list_loopback(struct sg_dma_desc_info *desc); 4285756a06SHans Verkuil void descriptor_list_end_of_chain(struct sg_dma_desc_info *desc); 4385756a06SHans Verkuil 4485756a06SHans Verkuil void *descriptor_list_allocate(struct sg_dma_desc_info *desc, size_t bytes); 4585756a06SHans Verkuil void descriptor_list_free(struct sg_dma_desc_info *desc); 4685756a06SHans Verkuil 4785756a06SHans Verkuil void descriptor_list_interrupt_enable(struct sg_dma_desc_info *desc); 4885756a06SHans Verkuil void descriptor_list_interrupt_disable(struct sg_dma_desc_info *desc); 4985756a06SHans Verkuil 5085756a06SHans Verkuil #endif 51