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/*
* Copyright 2008-2015 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*
* Copyright (c) 2015, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef _ENIC_VNIC_WQ_H_
#define _ENIC_VNIC_WQ_H_
#include "vnic_dev.h"
#include "vnic_cq.h"
static inline void enic_vnic_post_wq_index(struct vnic_wq *wq)
{
struct vnic_wq_buf *buf = wq->to_use;
/* Adding write memory barrier prevents compiler and/or CPU
* reordering, thus avoiding descriptor posting before
* descriptor is initialized. Otherwise, hardware can read
* stale descriptor fields.
*/
wmb();
iowrite32(buf->index, &wq->ctrl->posted_index);
}
static inline void enic_vnic_post_wq(struct vnic_wq *wq,
void *os_buf, dma_addr_t dma_addr,
unsigned int len, int sop,
uint8_t desc_skip_cnt, uint8_t cq_entry,
uint8_t compressed_send, uint64_t wrid)
{
struct vnic_wq_buf *buf = wq->to_use;
buf->sop = sop;
buf->cq_entry = cq_entry;
buf->compressed_send = compressed_send;
buf->desc_skip_cnt = desc_skip_cnt;
buf->os_buf = os_buf;
buf->dma_addr = dma_addr;
buf->len = len;
buf->wr_id = wrid;
buf = buf->next;
if (cq_entry)
enic_vnic_post_wq_index(wq);
wq->to_use = buf;
wq->ring.desc_avail -= desc_skip_cnt;
}
#endif /* _ENIC_VNIC_WQ_H_ */
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