1 /*
2 * Copyright 2008-2010 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 */
19
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/pci.h>
24
25 #include "vnic_dev.h"
26 #include "vnic_cq.h"
27
vnic_cq_free(struct vnic_cq * cq)28 void vnic_cq_free(struct vnic_cq *cq)
29 {
30 vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
31
32 cq->ctrl = NULL;
33 }
34
vnic_cq_alloc(struct vnic_dev * vdev,struct vnic_cq * cq,unsigned int index,unsigned int desc_count,unsigned int desc_size)35 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
36 unsigned int desc_count, unsigned int desc_size)
37 {
38 int err;
39
40 cq->index = index;
41 cq->vdev = vdev;
42
43 cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
44 if (!cq->ctrl) {
45 pr_err("Failed to hook CQ[%d] resource\n", index);
46 return -EINVAL;
47 }
48
49 err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
50 if (err)
51 return err;
52
53 return 0;
54 }
55
vnic_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)56 void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
57 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
58 unsigned int cq_tail_color, unsigned int interrupt_enable,
59 unsigned int cq_entry_enable, unsigned int cq_message_enable,
60 unsigned int interrupt_offset, u64 cq_message_addr)
61 {
62 u64 paddr;
63
64 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
65 writeq(paddr, &cq->ctrl->ring_base);
66 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
67 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
68 iowrite32(color_enable, &cq->ctrl->color_enable);
69 iowrite32(cq_head, &cq->ctrl->cq_head);
70 iowrite32(cq_tail, &cq->ctrl->cq_tail);
71 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
72 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
73 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
74 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
75 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
76 writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
77
78 cq->interrupt_offset = interrupt_offset;
79 }
80
vnic_cq_clean(struct vnic_cq * cq)81 void vnic_cq_clean(struct vnic_cq *cq)
82 {
83 cq->to_clean = 0;
84 cq->last_color = 0;
85
86 iowrite32(0, &cq->ctrl->cq_head);
87 iowrite32(0, &cq->ctrl->cq_tail);
88 iowrite32(1, &cq->ctrl->cq_tail_color);
89
90 vnic_dev_clear_desc_ring(&cq->ring);
91 }
92