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(vdev: cq->vdev, ring: &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, type: 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, ring: &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(val: paddr, addr: &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(val: cq_message_addr, 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(ring: &cq->ring);
73}
74

source code of linux/drivers/scsi/fnic/vnic_cq.c