a3b1e9551c
The list of mbufs held by the driver on Tx was allocated in chunks (a hold-over from the enic kernel mode driver). The structure used next pointers across chunks which led to cache misses. Allocate the array used to hold mbufs in flight on Tx with rte_zmalloc_socket(). Remove unnecessary fields from the structure and use head and tail pointers instead of next pointers. Signed-off-by: John Daley <johndale@cisco.com>
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
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* Copyright 2008-2015 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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*
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* Copyright (c) 2015, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _ENIC_VNIC_WQ_H_
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#define _ENIC_VNIC_WQ_H_
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#include "vnic_dev.h"
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#include "vnic_cq.h"
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static inline void enic_vnic_post_wq_index(struct vnic_wq *wq)
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{
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/* Adding write memory barrier prevents compiler and/or CPU
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* reordering, thus avoiding descriptor posting before
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* descriptor is initialized. Otherwise, hardware can read
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* stale descriptor fields.
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*/
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wmb();
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iowrite32(wq->head_idx, &wq->ctrl->posted_index);
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}
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static inline void enic_vnic_post_wq(struct vnic_wq *wq,
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void *os_buf, uint8_t cq_entry)
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{
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struct vnic_wq_buf *buf = &wq->bufs[wq->head_idx];
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buf->mb = os_buf;
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wq->head_idx = enic_ring_incr(wq->ring.desc_count, wq->head_idx);
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if (cq_entry)
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enic_vnic_post_wq_index(wq);
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}
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#endif /* _ENIC_VNIC_WQ_H_ */
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