summaryrefslogtreecommitdiff
path: root/lib/librte_pmd_enic/vnic/vnic_cq.h
blob: 9ed9b1d2a2a3c6cf6a75e0ead2e809477796df61 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * Copyright (c) 2014, Cisco Systems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the
 * distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */
#ident "$Id: vnic_cq.h 173398 2014-05-19 09:17:02Z gvaradar $"

#ifndef _VNIC_CQ_H_
#define _VNIC_CQ_H_

#include <rte_mbuf.h>

#include "cq_desc.h"
#include "vnic_dev.h"

/* Completion queue control */
struct vnic_cq_ctrl {
	u64 ring_base;			/* 0x00 */
	u32 ring_size;			/* 0x08 */
	u32 pad0;
	u32 flow_control_enable;	/* 0x10 */
	u32 pad1;
	u32 color_enable;		/* 0x18 */
	u32 pad2;
	u32 cq_head;			/* 0x20 */
	u32 pad3;
	u32 cq_tail;			/* 0x28 */
	u32 pad4;
	u32 cq_tail_color;		/* 0x30 */
	u32 pad5;
	u32 interrupt_enable;		/* 0x38 */
	u32 pad6;
	u32 cq_entry_enable;		/* 0x40 */
	u32 pad7;
	u32 cq_message_enable;		/* 0x48 */
	u32 pad8;
	u32 interrupt_offset;		/* 0x50 */
	u32 pad9;
	u64 cq_message_addr;		/* 0x58 */
	u32 pad10;
};

#ifdef ENIC_AIC
struct vnic_rx_bytes_counter {
	unsigned int small_pkt_bytes_cnt;
	unsigned int large_pkt_bytes_cnt;
};
#endif

struct vnic_cq {
	unsigned int index;
	struct vnic_dev *vdev;
	struct vnic_cq_ctrl __iomem *ctrl;              /* memory-mapped */
	struct vnic_dev_ring ring;
	unsigned int to_clean;
	unsigned int last_color;
	unsigned int interrupt_offset;
#ifdef ENIC_AIC
	struct vnic_rx_bytes_counter pkt_size_counter;
	unsigned int cur_rx_coal_timeval;
	unsigned int tobe_rx_coal_timeval;
	ktime_t prev_ts;
#endif
};

static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
	unsigned int work_to_do,
	int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
	u8 type, u16 q_number, u16 completed_index, void *opaque),
	void *opaque)
{
	struct cq_desc *cq_desc;
	unsigned int work_done = 0;
	u16 q_number, completed_index;
	u8 type, color;
	struct rte_mbuf **rx_pkts = opaque;
	unsigned int ret;
	unsigned int split_hdr_size = vnic_get_hdr_split_size(cq->vdev);

	cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
		cq->ring.desc_size * cq->to_clean);
	cq_desc_dec(cq_desc, &type, &color,
		&q_number, &completed_index);

	while (color != cq->last_color) {
		if (opaque)
			opaque = (void *)&(rx_pkts[work_done]);

		ret = (*q_service)(cq->vdev, cq_desc, type,
			q_number, completed_index, opaque);
		cq->to_clean++;
		if (cq->to_clean == cq->ring.desc_count) {
			cq->to_clean = 0;
			cq->last_color = cq->last_color ? 0 : 1;
		}

		cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
			cq->ring.desc_size * cq->to_clean);
		cq_desc_dec(cq_desc, &type, &color,
			&q_number, &completed_index);

		if (ret)
			work_done++;
		if (work_done >= work_to_do)
			break;
	}

	return work_done;
}

void vnic_cq_free(struct vnic_cq *cq);
int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
	unsigned int socket_id,
	unsigned int desc_count, unsigned int desc_size);
void 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 message_enable,
	unsigned int interrupt_offset, u64 message_addr);
void vnic_cq_clean(struct vnic_cq *cq);
int vnic_cq_mem_size(struct vnic_cq *cq, unsigned int desc_count,
	unsigned int desc_size);

#endif /* _VNIC_CQ_H_ */