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 | |
12 | void 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 | |
19 | int 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 | |
40 | void 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 | |
63 | void 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 | |