vnic_cq.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 4 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 5 */
 6
 7#ifndef _VNIC_CQ_H_
 8#define _VNIC_CQ_H_
 9
10#include "cq_desc.h"
11#include "vnic_dev.h"
12
13/* Completion queue control */
14struct vnic_cq_ctrl {
15	u64 ring_base;			/* 0x00 */
16	u32 ring_size;			/* 0x08 */
17	u32 pad0;
18	u32 flow_control_enable;	/* 0x10 */
19	u32 pad1;
20	u32 color_enable;		/* 0x18 */
21	u32 pad2;
22	u32 cq_head;			/* 0x20 */
23	u32 pad3;
24	u32 cq_tail;			/* 0x28 */
25	u32 pad4;
26	u32 cq_tail_color;		/* 0x30 */
27	u32 pad5;
28	u32 interrupt_enable;		/* 0x38 */
29	u32 pad6;
30	u32 cq_entry_enable;		/* 0x40 */
31	u32 pad7;
32	u32 cq_message_enable;		/* 0x48 */
33	u32 pad8;
34	u32 interrupt_offset;		/* 0x50 */
35	u32 pad9;
36	u64 cq_message_addr;		/* 0x58 */
37	u32 pad10;
38};
39
40struct vnic_rx_bytes_counter {
41	unsigned int small_pkt_bytes_cnt;
42	unsigned int large_pkt_bytes_cnt;
43};
44
45struct vnic_cq {
46	unsigned int index;
47	struct vnic_dev *vdev;
48	struct vnic_cq_ctrl __iomem *ctrl;              /* memory-mapped */
49	struct vnic_dev_ring ring;
50	unsigned int to_clean;
51	unsigned int last_color;
52	unsigned int interrupt_offset;
53	struct vnic_rx_bytes_counter pkt_size_counter;
54	unsigned int cur_rx_coal_timeval;
55	unsigned int tobe_rx_coal_timeval;
56	ktime_t prev_ts;
57};
58
59static inline void *vnic_cq_to_clean(struct vnic_cq *cq)
60{
61	return ((u8 *)cq->ring.descs + cq->ring.desc_size * cq->to_clean);
62}
63
64static inline void vnic_cq_inc_to_clean(struct vnic_cq *cq)
65{
66	cq->to_clean++;
67	if (cq->to_clean == cq->ring.desc_count) {
68		cq->to_clean = 0;
69		cq->last_color = cq->last_color ? 0 : 1;
70	}
71}
72
73void vnic_cq_free(struct vnic_cq *cq);
74int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
75	unsigned int desc_count, unsigned int desc_size);
76void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
77	unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
78	unsigned int cq_tail_color, unsigned int interrupt_enable,
79	unsigned int cq_entry_enable, unsigned int message_enable,
80	unsigned int interrupt_offset, u64 message_addr);
81void vnic_cq_clean(struct vnic_cq *cq);
82
83#endif /* _VNIC_CQ_H_ */