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 | |
10 | void 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 | |
17 | int 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 | |
33 | void 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 | |
56 | void 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 | |