1/*
2 * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *	- Redistributions of source code must retain the above
15 *	  copyright notice, this list of conditions and the following
16 *	  disclaimer.
17 *
18 *	- Redistributions in binary form must reproduce the above
19 *	  copyright notice, this list of conditions and the following
20 *	  disclaimer in the documentation and/or other materials
21 *	  provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#ifndef MLX4_CQ_H
34#define MLX4_CQ_H
35
36#include <linux/types.h>
37
38#include <linux/mlx4/device.h>
39#include <linux/mlx4/doorbell.h>
40
41struct mlx4_cqe {
42	__be32			my_qpn;
43	__be32			immed_rss_invalid;
44	__be32			g_mlpath_rqpn;
45	u8			sl;
46	u8			reserved1;
47	__be16			rlid;
48	u32			reserved2;
49	__be32			byte_cnt;
50	__be16			wqe_index;
51	__be16			checksum;
52	u8			reserved3[3];
53	u8			owner_sr_opcode;
54};
55
56struct mlx4_err_cqe {
57	__be32			my_qpn;
58	u32			reserved1[5];
59	__be16			wqe_index;
60	u8			vendor_err_syndrome;
61	u8			syndrome;
62	u8			reserved2[3];
63	u8			owner_sr_opcode;
64};
65
66enum {
67	MLX4_CQE_OWNER_MASK	= 0x80,
68	MLX4_CQE_IS_SEND_MASK	= 0x40,
69	MLX4_CQE_OPCODE_MASK	= 0x1f
70};
71
72enum {
73	MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR		= 0x01,
74	MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR		= 0x02,
75	MLX4_CQE_SYNDROME_LOCAL_PROT_ERR		= 0x04,
76	MLX4_CQE_SYNDROME_WR_FLUSH_ERR			= 0x05,
77	MLX4_CQE_SYNDROME_MW_BIND_ERR			= 0x06,
78	MLX4_CQE_SYNDROME_BAD_RESP_ERR			= 0x10,
79	MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR		= 0x11,
80	MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR		= 0x12,
81	MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR		= 0x13,
82	MLX4_CQE_SYNDROME_REMOTE_OP_ERR			= 0x14,
83	MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR	= 0x15,
84	MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR		= 0x16,
85	MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR		= 0x22,
86};
87
88static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
89			       void __iomem *uar_page,
90			       spinlock_t *doorbell_lock)
91{
92	__be32 doorbell[2];
93	u32 sn;
94	u32 ci;
95
96	sn = cq->arm_sn & 3;
97	ci = cq->cons_index & 0xffffff;
98
99	*cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
100
101	/*
102	 * Make sure that the doorbell record in host memory is
103	 * written before ringing the doorbell via PCI MMIO.
104	 */
105	wmb();
106
107	doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);
108	doorbell[1] = cpu_to_be32(ci);
109
110	mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);
111}
112
113static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)
114{
115	*cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
116}
117
118enum {
119	MLX4_CQ_DB_REQ_NOT_SOL		= 1 << 24,
120	MLX4_CQ_DB_REQ_NOT		= 2 << 24
121};
122
123#endif /* MLX4_CQ_H */
124