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/*
* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*
* Copyright (c) 2014, 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.
*
*/
#ident "$Id: vnic_cq.h 173398 2014-05-19 09:17:02Z gvaradar $"
#ifndef _VNIC_CQ_H_
#define _VNIC_CQ_H_
#include <rte_mbuf.h>
#include "cq_desc.h"
#include "vnic_dev.h"
/* Completion queue control */
struct vnic_cq_ctrl {
u64 ring_base; /* 0x00 */
u32 ring_size; /* 0x08 */
u32 pad0;
u32 flow_control_enable; /* 0x10 */
u32 pad1;
u32 color_enable; /* 0x18 */
u32 pad2;
u32 cq_head; /* 0x20 */
u32 pad3;
u32 cq_tail; /* 0x28 */
u32 pad4;
u32 cq_tail_color; /* 0x30 */
u32 pad5;
u32 interrupt_enable; /* 0x38 */
u32 pad6;
u32 cq_entry_enable; /* 0x40 */
u32 pad7;
u32 cq_message_enable; /* 0x48 */
u32 pad8;
u32 interrupt_offset; /* 0x50 */
u32 pad9;
u64 cq_message_addr; /* 0x58 */
u32 pad10;
};
#ifdef ENIC_AIC
struct vnic_rx_bytes_counter {
unsigned int small_pkt_bytes_cnt;
unsigned int large_pkt_bytes_cnt;
};
#endif
struct vnic_cq {
unsigned int index;
struct vnic_dev *vdev;
struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
struct vnic_dev_ring ring;
unsigned int to_clean;
unsigned int last_color;
unsigned int interrupt_offset;
#ifdef ENIC_AIC
struct vnic_rx_bytes_counter pkt_size_counter;
unsigned int cur_rx_coal_timeval;
unsigned int tobe_rx_coal_timeval;
ktime_t prev_ts;
#endif
};
static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
unsigned int work_to_do,
int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
u8 type, u16 q_number, u16 completed_index, void *opaque),
void *opaque)
{
struct cq_desc *cq_desc;
unsigned int work_done = 0;
u16 q_number, completed_index;
u8 type, color;
struct rte_mbuf **rx_pkts = opaque;
unsigned int ret;
cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
cq->ring.desc_size * cq->to_clean);
cq_desc_dec(cq_desc, &type, &color,
&q_number, &completed_index);
while (color != cq->last_color) {
if (opaque)
opaque = (void *)&(rx_pkts[work_done]);
ret = (*q_service)(cq->vdev, cq_desc, type,
q_number, completed_index, opaque);
cq->to_clean++;
if (cq->to_clean == cq->ring.desc_count) {
cq->to_clean = 0;
cq->last_color = cq->last_color ? 0 : 1;
}
cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
cq->ring.desc_size * cq->to_clean);
cq_desc_dec(cq_desc, &type, &color,
&q_number, &completed_index);
if (ret)
work_done++;
if (work_done >= work_to_do)
break;
}
return work_done;
}
void vnic_cq_free(struct vnic_cq *cq);
int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
unsigned int socket_id,
unsigned int desc_count, unsigned int desc_size);
void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
unsigned int cq_tail_color, unsigned int interrupt_enable,
unsigned int cq_entry_enable, unsigned int message_enable,
unsigned int interrupt_offset, u64 message_addr);
void vnic_cq_clean(struct vnic_cq *cq);
int vnic_cq_mem_size(struct vnic_cq *cq, unsigned int desc_count,
unsigned int desc_size);
#endif /* _VNIC_CQ_H_ */
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