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
vnic_cq_free(struct vnic_cq * cq)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
vnic_cq_alloc(struct vnic_dev * vdev,struct vnic_cq * cq,unsigned int index,unsigned int desc_count,unsigned int desc_size)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
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)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
vnic_cq_clean(struct vnic_cq * cq)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 }
86