18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Omnitek Scatter-Gather DMA Controller 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates. 68c2ecf20Sopenharmony_ci * All rights reserved. 78c2ecf20Sopenharmony_ci */ 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci#ifndef COBALT_OMNITEK_H 108c2ecf20Sopenharmony_ci#define COBALT_OMNITEK_H 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci#include <linux/scatterlist.h> 138c2ecf20Sopenharmony_ci#include "cobalt-driver.h" 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_cistruct sg_dma_descriptor { 168c2ecf20Sopenharmony_ci u32 pci_l; 178c2ecf20Sopenharmony_ci u32 pci_h; 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci u32 local; 208c2ecf20Sopenharmony_ci u32 reserved0; 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci u32 next_l; 238c2ecf20Sopenharmony_ci u32 next_h; 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci u32 bytes; 268c2ecf20Sopenharmony_ci u32 reserved1; 278c2ecf20Sopenharmony_ci}; 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ciint omni_sg_dma_init(struct cobalt *cobalt); 308c2ecf20Sopenharmony_civoid omni_sg_dma_abort_channel(struct cobalt_stream *s); 318c2ecf20Sopenharmony_civoid omni_sg_dma_start(struct cobalt_stream *s, struct sg_dma_desc_info *desc); 328c2ecf20Sopenharmony_cibool is_dma_done(struct cobalt_stream *s); 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ciint descriptor_list_create(struct cobalt *cobalt, 358c2ecf20Sopenharmony_ci struct scatterlist *scatter_list, bool to_pci, unsigned sglen, 368c2ecf20Sopenharmony_ci unsigned size, unsigned width, unsigned stride, 378c2ecf20Sopenharmony_ci struct sg_dma_desc_info *desc); 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_civoid descriptor_list_chain(struct sg_dma_desc_info *this, 408c2ecf20Sopenharmony_ci struct sg_dma_desc_info *next); 418c2ecf20Sopenharmony_civoid descriptor_list_loopback(struct sg_dma_desc_info *desc); 428c2ecf20Sopenharmony_civoid descriptor_list_end_of_chain(struct sg_dma_desc_info *desc); 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_civoid *descriptor_list_allocate(struct sg_dma_desc_info *desc, size_t bytes); 458c2ecf20Sopenharmony_civoid descriptor_list_free(struct sg_dma_desc_info *desc); 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_civoid descriptor_list_interrupt_enable(struct sg_dma_desc_info *desc); 488c2ecf20Sopenharmony_civoid descriptor_list_interrupt_disable(struct sg_dma_desc_info *desc); 498c2ecf20Sopenharmony_ci 508c2ecf20Sopenharmony_ci#endif 51