cq_desc.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 _CQ_DESC_H_
 8#define _CQ_DESC_H_
 9
10/*
11 * Completion queue descriptor types
12 */
13enum cq_desc_types {
14	CQ_DESC_TYPE_WQ_ENET = 0,
15	CQ_DESC_TYPE_DESC_COPY = 1,
16	CQ_DESC_TYPE_WQ_EXCH = 2,
17	CQ_DESC_TYPE_RQ_ENET = 3,
18	CQ_DESC_TYPE_RQ_FCP = 4,
19};
20
21/* Completion queue descriptor: 16B
22 *
23 * All completion queues have this basic layout.  The
24 * type_specfic area is unique for each completion
25 * queue type.
26 */
27struct cq_desc {
28	__le16 completed_index;
29	__le16 q_number;
30	u8 type_specfic[11];
31	u8 type_color;
32};
33
34#define CQ_DESC_TYPE_BITS        4
35#define CQ_DESC_TYPE_MASK        ((1 << CQ_DESC_TYPE_BITS) - 1)
36#define CQ_DESC_COLOR_MASK       1
37#define CQ_DESC_COLOR_SHIFT      7
38#define CQ_DESC_Q_NUM_BITS       10
39#define CQ_DESC_Q_NUM_MASK       ((1 << CQ_DESC_Q_NUM_BITS) - 1)
40#define CQ_DESC_COMP_NDX_BITS    12
41#define CQ_DESC_COMP_NDX_MASK    ((1 << CQ_DESC_COMP_NDX_BITS) - 1)
42
43#define CQ_DESC_32_FI_MASK (BIT(0) | BIT(1))
44#define CQ_DESC_64_FI_MASK (BIT(0) | BIT(1))
45
46#endif /* _CQ_DESC_H_ */