1/*
2 * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 */
17
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/pci.h>
21#include "vnic_dev.h"
22#include "vnic_cq.h"
23
24void svnic_cq_free(struct vnic_cq *cq)
25{
26	svnic_dev_free_desc_ring(cq->vdev, &cq->ring);
27
28	cq->ctrl = NULL;
29}
30
31int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
32	unsigned int index, unsigned int desc_count, unsigned int desc_size)
33{
34	cq->index = index;
35	cq->vdev = vdev;
36
37	cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index);
38	if (!cq->ctrl) {
39		pr_err("Failed to hook CQ[%d] resource\n", index);
40
41		return -EINVAL;
42	}
43
44	return svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
45}
46
47void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
48	unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
49	unsigned int cq_tail_color, unsigned int interrupt_enable,
50	unsigned int cq_entry_enable, unsigned int cq_message_enable,
51	unsigned int interrupt_offset, u64 cq_message_addr)
52{
53	u64 paddr;
54
55	paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
56	writeq(paddr, &cq->ctrl->ring_base);
57	iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
58	iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
59	iowrite32(color_enable, &cq->ctrl->color_enable);
60	iowrite32(cq_head, &cq->ctrl->cq_head);
61	iowrite32(cq_tail, &cq->ctrl->cq_tail);
62	iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
63	iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
64	iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
65	iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
66	iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
67	writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
68}
69
70void svnic_cq_clean(struct vnic_cq *cq)
71{
72	cq->to_clean = 0;
73	cq->last_color = 0;
74
75	iowrite32(0, &cq->ctrl->cq_head);
76	iowrite32(0, &cq->ctrl->cq_tail);
77	iowrite32(1, &cq->ctrl->cq_tail_color);
78
79	svnic_dev_clear_desc_ring(&cq->ring);
80}
81