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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.c 171146 2014-05-02 07:08:20Z ssujith $"
#include "vnic_dev.h"
#include "vnic_cq.h"
int vnic_cq_mem_size(struct vnic_cq *cq, unsigned int desc_count,
unsigned int desc_size)
{
int mem_size;
mem_size = vnic_dev_desc_ring_size(&cq->ring, desc_count, desc_size);
return mem_size;
}
void vnic_cq_free(struct vnic_cq *cq)
{
vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
cq->ctrl = NULL;
}
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)
{
int err;
char res_name[NAME_MAX];
static int instance;
cq->index = index;
cq->vdev = vdev;
cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
if (!cq->ctrl) {
pr_err("Failed to hook CQ[%d] resource\n", index);
return -EINVAL;
}
snprintf(res_name, sizeof(res_name), "%d-cq-%d", instance++, index);
err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size,
socket_id, res_name);
if (err)
return err;
return 0;
}
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 cq_message_enable,
unsigned int interrupt_offset, u64 cq_message_addr)
{
u64 paddr;
paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
writeq(paddr, &cq->ctrl->ring_base);
iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
iowrite32(color_enable, &cq->ctrl->color_enable);
iowrite32(cq_head, &cq->ctrl->cq_head);
iowrite32(cq_tail, &cq->ctrl->cq_tail);
iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
cq->interrupt_offset = interrupt_offset;
}
void vnic_cq_clean(struct vnic_cq *cq)
{
cq->to_clean = 0;
cq->last_color = 0;
iowrite32(0, &cq->ctrl->cq_head);
iowrite32(0, &cq->ctrl->cq_tail);
iowrite32(1, &cq->ctrl->cq_tail_color);
vnic_dev_clear_desc_ring(&cq->ring);
}
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