1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
5 */
6#include <linux/errno.h>
7#include <linux/types.h>
8#include <linux/pci.h>
9#include "vnic_dev.h"
10#include "vnic_cq.h"
11
12void vnic_cq_free(struct vnic_cq *cq)
13{
14	vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
15
16	cq->ctrl = NULL;
17}
18
19int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
20	unsigned int desc_count, unsigned int desc_size)
21{
22	int err;
23
24	cq->index = index;
25	cq->vdev = vdev;
26
27	cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
28	if (!cq->ctrl) {
29		printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index);
30		return -EINVAL;
31	}
32
33	err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
34	if (err)
35		return err;
36
37	return 0;
38}
39
40void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
41	unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
42	unsigned int cq_tail_color, unsigned int interrupt_enable,
43	unsigned int cq_entry_enable, unsigned int cq_message_enable,
44	unsigned int interrupt_offset, u64 cq_message_addr)
45{
46	u64 paddr;
47
48	paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
49	writeq(paddr, &cq->ctrl->ring_base);
50	iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
51	iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
52	iowrite32(color_enable, &cq->ctrl->color_enable);
53	iowrite32(cq_head, &cq->ctrl->cq_head);
54	iowrite32(cq_tail, &cq->ctrl->cq_tail);
55	iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
56	iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
57	iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
58	iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
59	iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
60	writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
61}
62
63void vnic_cq_clean(struct vnic_cq *cq)
64{
65	cq->to_clean = 0;
66	cq->last_color = 0;
67
68	iowrite32(0, &cq->ctrl->cq_head);
69	iowrite32(0, &cq->ctrl->cq_tail);
70	iowrite32(1, &cq->ctrl->cq_tail_color);
71
72	vnic_dev_clear_desc_ring(&cq->ring);
73}
74