1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright 2014 Cisco Systems, Inc.  All rights reserved.
3 
4 #include <linux/errno.h>
5 #include <linux/types.h>
6 #include <linux/pci.h>
7 #include "vnic_dev.h"
8 #include "vnic_cq.h"
9 
svnic_cq_free(struct vnic_cq * cq)10 void svnic_cq_free(struct vnic_cq *cq)
11 {
12 	svnic_dev_free_desc_ring(cq->vdev, &cq->ring);
13 
14 	cq->ctrl = NULL;
15 }
16 
svnic_cq_alloc(struct vnic_dev * vdev,struct vnic_cq * cq,unsigned int index,unsigned int desc_count,unsigned int desc_size)17 int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
18 	unsigned int index, unsigned int desc_count, unsigned int desc_size)
19 {
20 	cq->index = index;
21 	cq->vdev = vdev;
22 
23 	cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index);
24 	if (!cq->ctrl) {
25 		pr_err("Failed to hook CQ[%d] resource\n", index);
26 
27 		return -EINVAL;
28 	}
29 
30 	return svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
31 }
32 
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)33 void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
34 	unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
35 	unsigned int cq_tail_color, unsigned int interrupt_enable,
36 	unsigned int cq_entry_enable, unsigned int cq_message_enable,
37 	unsigned int interrupt_offset, u64 cq_message_addr)
38 {
39 	u64 paddr;
40 
41 	paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
42 	writeq(paddr, &cq->ctrl->ring_base);
43 	iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
44 	iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
45 	iowrite32(color_enable, &cq->ctrl->color_enable);
46 	iowrite32(cq_head, &cq->ctrl->cq_head);
47 	iowrite32(cq_tail, &cq->ctrl->cq_tail);
48 	iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
49 	iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
50 	iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
51 	iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
52 	iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
53 	writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
54 }
55 
svnic_cq_clean(struct vnic_cq * cq)56 void svnic_cq_clean(struct vnic_cq *cq)
57 {
58 	cq->to_clean = 0;
59 	cq->last_color = 0;
60 
61 	iowrite32(0, &cq->ctrl->cq_head);
62 	iowrite32(0, &cq->ctrl->cq_tail);
63 	iowrite32(1, &cq->ctrl->cq_tail_color);
64 
65 	svnic_dev_clear_desc_ring(&cq->ring);
66 }
67