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			vlan_my_qpn;
43	__be32			immed_rss_invalid;
44	__be32			g_mlpath_rqpn;
45	__be16			sl_vid;
46	__be16			rlid;
47	__be16			status;
48	u8			ipv6_ext_mask;
49	u8			badfcs_enc;
50	__be32			byte_cnt;
51	__be16			wqe_index;
52	__be16			checksum;
53	u8			reserved[3];
54	u8			owner_sr_opcode;
55};
56
57struct mlx4_err_cqe {
58	__be32			my_qpn;
59	u32			reserved1[5];
60	__be16			wqe_index;
61	u8			vendor_err_syndrome;
62	u8			syndrome;
63	u8			reserved2[3];
64	u8			owner_sr_opcode;
65};
66
67struct mlx4_ts_cqe {
68	__be32			vlan_my_qpn;
69	__be32			immed_rss_invalid;
70	__be32			g_mlpath_rqpn;
71	__be32			timestamp_hi;
72	__be16			status;
73	u8			ipv6_ext_mask;
74	u8			badfcs_enc;
75	__be32			byte_cnt;
76	__be16			wqe_index;
77	__be16			checksum;
78	u8			reserved;
79	__be16			timestamp_lo;
80	u8			owner_sr_opcode;
81} __packed;
82
83enum {
84	MLX4_CQE_VLAN_PRESENT_MASK	= 1 << 29,
85	MLX4_CQE_QPN_MASK		= 0xffffff,
86};
87
88enum {
89	MLX4_CQE_OWNER_MASK	= 0x80,
90	MLX4_CQE_IS_SEND_MASK	= 0x40,
91	MLX4_CQE_OPCODE_MASK	= 0x1f
92};
93
94enum {
95	MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR		= 0x01,
96	MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR		= 0x02,
97	MLX4_CQE_SYNDROME_LOCAL_PROT_ERR		= 0x04,
98	MLX4_CQE_SYNDROME_WR_FLUSH_ERR			= 0x05,
99	MLX4_CQE_SYNDROME_MW_BIND_ERR			= 0x06,
100	MLX4_CQE_SYNDROME_BAD_RESP_ERR			= 0x10,
101	MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR		= 0x11,
102	MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR		= 0x12,
103	MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR		= 0x13,
104	MLX4_CQE_SYNDROME_REMOTE_OP_ERR			= 0x14,
105	MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR	= 0x15,
106	MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR		= 0x16,
107	MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR		= 0x22,
108};
109
110enum {
111	MLX4_CQE_STATUS_IPV4		= 1 << 6,
112	MLX4_CQE_STATUS_IPV4F		= 1 << 7,
113	MLX4_CQE_STATUS_IPV6		= 1 << 8,
114	MLX4_CQE_STATUS_IPV4OPT		= 1 << 9,
115	MLX4_CQE_STATUS_TCP		= 1 << 10,
116	MLX4_CQE_STATUS_UDP		= 1 << 11,
117	MLX4_CQE_STATUS_IPOK		= 1 << 12,
118};
119
120enum {
121	MLX4_CQE_LLC                     = 1,
122	MLX4_CQE_SNAP                    = 1 << 1,
123	MLX4_CQE_BAD_FCS                 = 1 << 4,
124};
125
126static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
127			       void __iomem *uar_page,
128			       spinlock_t *doorbell_lock)
129{
130	__be32 doorbell[2];
131	u32 sn;
132	u32 ci;
133
134	sn = cq->arm_sn & 3;
135	ci = cq->cons_index & 0xffffff;
136
137	*cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
138
139	/*
140	 * Make sure that the doorbell record in host memory is
141	 * written before ringing the doorbell via PCI MMIO.
142	 */
143	wmb();
144
145	doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);
146	doorbell[1] = cpu_to_be32(ci);
147
148	mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);
149}
150
151static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)
152{
153	*cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
154}
155
156enum {
157	MLX4_CQ_DB_REQ_NOT_SOL		= 1 << 24,
158	MLX4_CQ_DB_REQ_NOT		= 2 << 24
159};
160
161int mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq,
162		   u16 count, u16 period);
163int mlx4_cq_resize(struct mlx4_dev *dev, struct mlx4_cq *cq,
164		   int entries, struct mlx4_mtt *mtt);
165int mlx4_cq_ignore_overrun(struct mlx4_dev *dev, struct mlx4_cq *cq);
166#endif /* MLX4_CQ_H */
167