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/*
* Omnitek Scatter-Gather DMA Controller
*
* Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.
* All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#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
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