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 #include <uapi/linux/if_ether.h>
38 
39 #include <linux/mlx4/device.h>
40 #include <linux/mlx4/doorbell.h>
41 
42 struct mlx4_cqe {
43 	__be32			vlan_my_qpn;
44 	__be32			immed_rss_invalid;
45 	__be32			g_mlpath_rqpn;
46 	__be16			sl_vid;
47 	union {
48 		struct {
49 			__be16	rlid;
50 			__be16  status;
51 			u8      ipv6_ext_mask;
52 			u8      badfcs_enc;
53 		};
54 		u8  smac[ETH_ALEN];
55 	};
56 	__be32			byte_cnt;
57 	__be16			wqe_index;
58 	__be16			checksum;
59 	u8			reserved[3];
60 	u8			owner_sr_opcode;
61 };
62 
63 struct mlx4_err_cqe {
64 	__be32			my_qpn;
65 	u32			reserved1[5];
66 	__be16			wqe_index;
67 	u8			vendor_err_syndrome;
68 	u8			syndrome;
69 	u8			reserved2[3];
70 	u8			owner_sr_opcode;
71 };
72 
73 struct mlx4_ts_cqe {
74 	__be32			vlan_my_qpn;
75 	__be32			immed_rss_invalid;
76 	__be32			g_mlpath_rqpn;
77 	__be32			timestamp_hi;
78 	__be16			status;
79 	u8			ipv6_ext_mask;
80 	u8			badfcs_enc;
81 	__be32			byte_cnt;
82 	__be16			wqe_index;
83 	__be16			checksum;
84 	u8			reserved;
85 	__be16			timestamp_lo;
86 	u8			owner_sr_opcode;
87 } __packed;
88 
89 enum {
90 	MLX4_CQE_L2_TUNNEL_IPOK		= 1 << 31,
91 	MLX4_CQE_CVLAN_PRESENT_MASK	= 1 << 29,
92 	MLX4_CQE_SVLAN_PRESENT_MASK	= 1 << 30,
93 	MLX4_CQE_L2_TUNNEL		= 1 << 27,
94 	MLX4_CQE_L2_TUNNEL_CSUM		= 1 << 26,
95 	MLX4_CQE_L2_TUNNEL_IPV4		= 1 << 25,
96 
97 	MLX4_CQE_QPN_MASK		= 0xffffff,
98 	MLX4_CQE_VID_MASK		= 0xfff,
99 };
100 
101 enum {
102 	MLX4_CQE_OWNER_MASK	= 0x80,
103 	MLX4_CQE_IS_SEND_MASK	= 0x40,
104 	MLX4_CQE_OPCODE_MASK	= 0x1f
105 };
106 
107 enum {
108 	MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR		= 0x01,
109 	MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR		= 0x02,
110 	MLX4_CQE_SYNDROME_LOCAL_PROT_ERR		= 0x04,
111 	MLX4_CQE_SYNDROME_WR_FLUSH_ERR			= 0x05,
112 	MLX4_CQE_SYNDROME_MW_BIND_ERR			= 0x06,
113 	MLX4_CQE_SYNDROME_BAD_RESP_ERR			= 0x10,
114 	MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR		= 0x11,
115 	MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR		= 0x12,
116 	MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR		= 0x13,
117 	MLX4_CQE_SYNDROME_REMOTE_OP_ERR			= 0x14,
118 	MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR	= 0x15,
119 	MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR		= 0x16,
120 	MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR		= 0x22,
121 };
122 
123 enum {
124 	MLX4_CQE_STATUS_IPV4		= 1 << 6,
125 	MLX4_CQE_STATUS_IPV4F		= 1 << 7,
126 	MLX4_CQE_STATUS_IPV6		= 1 << 8,
127 	MLX4_CQE_STATUS_IPV4OPT		= 1 << 9,
128 	MLX4_CQE_STATUS_TCP		= 1 << 10,
129 	MLX4_CQE_STATUS_UDP		= 1 << 11,
130 	MLX4_CQE_STATUS_IPOK		= 1 << 12,
131 };
132 
133 /* L4_CSUM is logically part of status, but has to checked against badfcs_enc */
134 enum {
135 	MLX4_CQE_STATUS_L4_CSUM		= 1 << 2,
136 };
137 
138 enum {
139 	MLX4_CQE_LLC                     = 1,
140 	MLX4_CQE_SNAP                    = 1 << 1,
141 	MLX4_CQE_BAD_FCS                 = 1 << 4,
142 };
143 
144 #define MLX4_MAX_CQ_PERIOD (BIT(16) - 1)
145 #define MLX4_MAX_CQ_COUNT (BIT(16) - 1)
146 
mlx4_cq_arm(struct mlx4_cq * cq,u32 cmd,void __iomem * uar_page,spinlock_t * doorbell_lock)147 static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
148 			       void __iomem *uar_page,
149 			       spinlock_t *doorbell_lock)
150 {
151 	__be32 doorbell[2];
152 	u32 sn;
153 	u32 ci;
154 
155 	sn = cq->arm_sn & 3;
156 	ci = cq->cons_index & 0xffffff;
157 
158 	*cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
159 
160 	/*
161 	 * Make sure that the doorbell record in host memory is
162 	 * written before ringing the doorbell via PCI MMIO.
163 	 */
164 	wmb();
165 
166 	doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);
167 	doorbell[1] = cpu_to_be32(ci);
168 
169 	mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);
170 }
171 
mlx4_cq_set_ci(struct mlx4_cq * cq)172 static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)
173 {
174 	*cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
175 }
176 
177 enum {
178 	MLX4_CQ_DB_REQ_NOT_SOL		= 1 << 24,
179 	MLX4_CQ_DB_REQ_NOT		= 2 << 24
180 };
181 
182 int mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq,
183 		   u16 count, u16 period);
184 int mlx4_cq_resize(struct mlx4_dev *dev, struct mlx4_cq *cq,
185 		   int entries, struct mlx4_mtt *mtt);
186 
187 #endif /* MLX4_CQ_H */
188