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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 | ||
24 | void 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 | ||
31 | int 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 | ||
52 | void 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 | ||
75 | void 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 | } |