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 #include "enic.h"
28
vnic_cq_free(struct vnic_cq * cq)29 void vnic_cq_free(struct vnic_cq *cq)
30 {
31 vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
32
33 cq->ctrl = NULL;
34 }
35
vnic_cq_alloc(struct vnic_dev * vdev,struct vnic_cq * cq,unsigned int index,unsigned int desc_count,unsigned int desc_size)36 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
37 unsigned int desc_count, unsigned int desc_size)
38 {
39 int err;
40
41 cq->index = index;
42 cq->vdev = vdev;
43
44 cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
45 if (!cq->ctrl) {
46 vdev_err(vdev, "Failed to hook CQ[%d] resource\n", index);
47 return -EINVAL;
48 }
49
50 err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
51 if (err)
52 return err;
53
54 return 0;
55 }
56
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)57 void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
58 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
59 unsigned int cq_tail_color, unsigned int interrupt_enable,
60 unsigned int cq_entry_enable, unsigned int cq_message_enable,
61 unsigned int interrupt_offset, u64 cq_message_addr)
62 {
63 u64 paddr;
64
65 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
66 writeq(paddr, &cq->ctrl->ring_base);
67 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
68 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
69 iowrite32(color_enable, &cq->ctrl->color_enable);
70 iowrite32(cq_head, &cq->ctrl->cq_head);
71 iowrite32(cq_tail, &cq->ctrl->cq_tail);
72 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
73 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
74 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
75 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
76 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
77 writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
78
79 cq->interrupt_offset = interrupt_offset;
80 }
81
vnic_cq_clean(struct vnic_cq * cq)82 void vnic_cq_clean(struct vnic_cq *cq)
83 {
84 cq->to_clean = 0;
85 cq->last_color = 0;
86
87 iowrite32(0, &cq->ctrl->cq_head);
88 iowrite32(0, &cq->ctrl->cq_tail);
89 iowrite32(1, &cq->ctrl->cq_tail_color);
90
91 vnic_dev_clear_desc_ring(&cq->ring);
92 }
93