1 /*
2 * Copyright 2014 Cisco Systems, Inc. All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 */
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
svnic_cq_free(struct vnic_cq * cq)24 void svnic_cq_free(struct vnic_cq *cq)
25 {
26 svnic_dev_free_desc_ring(cq->vdev, &cq->ring);
27
28 cq->ctrl = NULL;
29 }
30
svnic_cq_alloc(struct vnic_dev * vdev,struct vnic_cq * cq,unsigned int index,unsigned int desc_count,unsigned int desc_size)31 int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
32 unsigned int index, unsigned int desc_count, unsigned int desc_size)
33 {
34 cq->index = index;
35 cq->vdev = vdev;
36
37 cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index);
38 if (!cq->ctrl) {
39 pr_err("Failed to hook CQ[%d] resource\n", index);
40
41 return -EINVAL;
42 }
43
44 return svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
45 }
46
svnic_cq_init(struct vnic_cq * cq,unsigned int flow_control_enable,unsigned int color_enable,unsigned int cq_head,unsigned int cq_tail,unsigned int cq_tail_color,unsigned int interrupt_enable,unsigned int cq_entry_enable,unsigned int cq_message_enable,unsigned int interrupt_offset,u64 cq_message_addr)47 void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
48 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
49 unsigned int cq_tail_color, unsigned int interrupt_enable,
50 unsigned int cq_entry_enable, unsigned int cq_message_enable,
51 unsigned int interrupt_offset, u64 cq_message_addr)
52 {
53 u64 paddr;
54
55 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
56 writeq(paddr, &cq->ctrl->ring_base);
57 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
58 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
59 iowrite32(color_enable, &cq->ctrl->color_enable);
60 iowrite32(cq_head, &cq->ctrl->cq_head);
61 iowrite32(cq_tail, &cq->ctrl->cq_tail);
62 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
63 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
64 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
65 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
66 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
67 writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
68 }
69
svnic_cq_clean(struct vnic_cq * cq)70 void svnic_cq_clean(struct vnic_cq *cq)
71 {
72 cq->to_clean = 0;
73 cq->last_color = 0;
74
75 iowrite32(0, &cq->ctrl->cq_head);
76 iowrite32(0, &cq->ctrl->cq_tail);
77 iowrite32(1, &cq->ctrl->cq_tail_color);
78
79 svnic_dev_clear_desc_ring(&cq->ring);
80 }
81