1// SPDX-License-Identifier: GPL-2.0-only
 2// Copyright 2014 Cisco Systems, Inc.  All rights reserved.
 3
 4#include <linux/errno.h>
 5#include <linux/types.h>
 6#include <linux/pci.h>
 7#include "vnic_dev.h"
 8#include "vnic_cq.h"
 9
10void svnic_cq_free(struct vnic_cq *cq)
11{
12	svnic_dev_free_desc_ring(cq->vdev, &cq->ring);
13
14	cq->ctrl = NULL;
15}
16
17int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
18	unsigned int index, unsigned int desc_count, unsigned int desc_size)
19{
20	cq->index = index;
21	cq->vdev = vdev;
22
23	cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index);
24	if (!cq->ctrl) {
25		pr_err("Failed to hook CQ[%d] resource\n", index);
26
27		return -EINVAL;
28	}
29
30	return svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
31}
32
33void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
34	unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
35	unsigned int cq_tail_color, unsigned int interrupt_enable,
36	unsigned int cq_entry_enable, unsigned int cq_message_enable,
37	unsigned int interrupt_offset, u64 cq_message_addr)
38{
39	u64 paddr;
40
41	paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
42	writeq(paddr, &cq->ctrl->ring_base);
43	iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
44	iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
45	iowrite32(color_enable, &cq->ctrl->color_enable);
46	iowrite32(cq_head, &cq->ctrl->cq_head);
47	iowrite32(cq_tail, &cq->ctrl->cq_tail);
48	iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
49	iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
50	iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
51	iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
52	iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
53	writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
54}
55
56void svnic_cq_clean(struct vnic_cq *cq)
57{
58	cq->to_clean = 0;
59	cq->last_color = 0;
60
61	iowrite32(0, &cq->ctrl->cq_head);
62	iowrite32(0, &cq->ctrl->cq_tail);
63	iowrite32(1, &cq->ctrl->cq_tail_color);
64
65	svnic_dev_clear_desc_ring(&cq->ring);
66}