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(vdev: cq->vdev, ring: &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, type: 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, ring: &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(val: paddr, addr: &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(val: cq_message_addr, 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(ring: &cq->ring);
66}
67

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