Release 4.7 drivers/scsi/snic/vnic_cq.c
/*
* Copyright 2014 Cisco Systems, Inc. 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.
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "vnic_dev.h"
#include "vnic_cq.h"
void svnic_cq_free(struct vnic_cq *cq)
{
svnic_dev_free_desc_ring(cq->vdev, &cq->ring);
cq->ctrl = NULL;
}
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int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
unsigned int index, unsigned int desc_count, unsigned int desc_size)
{
int err;
cq->index = index;
cq->vdev = vdev;
cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index);
if (!cq->ctrl) {
pr_err("Failed to hook CQ[%d] resource\n", index);
return -EINVAL;
}
err = svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
if (err)
return err;
return 0;
}
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void svnic_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);
}
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void svnic_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);
svnic_dev_clear_desc_ring(&cq->ring);
}
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