1/*
2 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
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 vnic_cq_free(struct vnic_cq *cq)
25{
26	vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
27
28	cq->ctrl = NULL;
29}
30
31int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
32	unsigned int desc_count, unsigned int desc_size)
33{
34	int err;
35
36	cq->index = index;
37	cq->vdev = vdev;
38
39	cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
40	if (!cq->ctrl) {
41		printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index);
42		return -EINVAL;
43	}
44
45	err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
46	if (err)
47		return err;
48
49	return 0;
50}
51
52void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
53	unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
54	unsigned int cq_tail_color, unsigned int interrupt_enable,
55	unsigned int cq_entry_enable, unsigned int cq_message_enable,
56	unsigned int interrupt_offset, u64 cq_message_addr)
57{
58	u64 paddr;
59
60	paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
61	writeq(paddr, &cq->ctrl->ring_base);
62	iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
63	iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
64	iowrite32(color_enable, &cq->ctrl->color_enable);
65	iowrite32(cq_head, &cq->ctrl->cq_head);
66	iowrite32(cq_tail, &cq->ctrl->cq_tail);
67	iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
68	iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
69	iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
70	iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
71	iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
72	writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
73}
74
75void vnic_cq_clean(struct vnic_cq *cq)
76{
77	cq->to_clean = 0;
78	cq->last_color = 0;
79
80	iowrite32(0, &cq->ctrl->cq_head);
81	iowrite32(0, &cq->ctrl->cq_tail);
82	iowrite32(1, &cq->ctrl->cq_tail_color);
83
84	vnic_dev_clear_desc_ring(&cq->ring);
85}
86