xref: /linux/drivers/scsi/fnic/cq_enet_desc.h (revision 4b132aacb0768ac1e652cf517097ea6f237214b9)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
4  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
5  */
6 #ifndef _CQ_ENET_DESC_H_
7 #define _CQ_ENET_DESC_H_
8 
9 #include "cq_desc.h"
10 
11 /* Ethernet completion queue descriptor: 16B */
12 struct cq_enet_wq_desc {
13 	__le16 completed_index;
14 	__le16 q_number;
15 	u8 reserved[11];
16 	u8 type_color;
17 };
18 
19 static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
20 	u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
21 {
22 	cq_desc_dec((struct cq_desc *)desc, type,
23 		color, q_number, completed_index);
24 }
25 
26 /* Completion queue descriptor: Ethernet receive queue, 16B */
27 struct cq_enet_rq_desc {
28 	__le16 completed_index_flags;
29 	__le16 q_number_rss_type_flags;
30 	__le32 rss_hash;
31 	__le16 bytes_written_flags;
32 	__le16 vlan;
33 	__le16 checksum_fcoe;
34 	u8 flags;
35 	u8 type_color;
36 };
37 
38 #define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT          (0x1 << 12)
39 #define CQ_ENET_RQ_DESC_FLAGS_FCOE                  (0x1 << 13)
40 #define CQ_ENET_RQ_DESC_FLAGS_EOP                   (0x1 << 14)
41 #define CQ_ENET_RQ_DESC_FLAGS_SOP                   (0x1 << 15)
42 
43 #define CQ_ENET_RQ_DESC_RSS_TYPE_BITS               4
44 #define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
45 	((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
46 #define CQ_ENET_RQ_DESC_RSS_TYPE_NONE               0
47 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4               1
48 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4           2
49 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6               3
50 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6           4
51 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX            5
52 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX        6
53 
54 #define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC         (0x1 << 14)
55 
56 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS          14
57 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
58 	((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
59 #define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED             (0x1 << 14)
60 #define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED         (0x1 << 15)
61 
62 #define CQ_ENET_RQ_DESC_FCOE_SOF_BITS               4
63 #define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
64 	((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
65 #define CQ_ENET_RQ_DESC_FCOE_EOF_BITS               8
66 #define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
67 	((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
68 #define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT              8
69 
70 #define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK       (0x1 << 0)
71 #define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK              (0x1 << 0)
72 #define CQ_ENET_RQ_DESC_FLAGS_UDP                   (0x1 << 1)
73 #define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR              (0x1 << 1)
74 #define CQ_ENET_RQ_DESC_FLAGS_TCP                   (0x1 << 2)
75 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK          (0x1 << 3)
76 #define CQ_ENET_RQ_DESC_FLAGS_IPV6                  (0x1 << 4)
77 #define CQ_ENET_RQ_DESC_FLAGS_IPV4                  (0x1 << 5)
78 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT         (0x1 << 6)
79 #define CQ_ENET_RQ_DESC_FLAGS_FCS_OK                (0x1 << 7)
80 
81 static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
82 	u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
83 	u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
84 	u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
85 	u8 *vlan_stripped, u16 *vlan, u16 *checksum, u8 *fcoe_sof,
86 	u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
87 	u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
88 	u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
89 {
90 	u16 completed_index_flags = le16_to_cpu(desc->completed_index_flags);
91 	u16 q_number_rss_type_flags =
92 		le16_to_cpu(desc->q_number_rss_type_flags);
93 	u16 bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
94 
95 	cq_desc_dec((struct cq_desc *)desc, type,
96 		color, q_number, completed_index);
97 
98 	*ingress_port = (completed_index_flags &
99 		CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
100 	*fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
101 		1 : 0;
102 	*eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
103 		1 : 0;
104 	*sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
105 		1 : 0;
106 
107 	*rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
108 		CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
109 	*csum_not_calc = (q_number_rss_type_flags &
110 		CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
111 
112 	*rss_hash = le32_to_cpu(desc->rss_hash);
113 
114 	*bytes_written = bytes_written_flags &
115 		CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
116 	*packet_error = (bytes_written_flags &
117 		CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
118 	*vlan_stripped = (bytes_written_flags &
119 		CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
120 
121 	*vlan = le16_to_cpu(desc->vlan);
122 
123 	if (*fcoe) {
124 		*fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
125 			CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
126 		*fcoe_fc_crc_ok = (desc->flags &
127 			CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
128 		*fcoe_enc_error = (desc->flags &
129 			CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
130 		*fcoe_eof = (u8)((desc->checksum_fcoe >>
131 			CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
132 			CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
133 		*checksum = 0;
134 	} else {
135 		*fcoe_sof = 0;
136 		*fcoe_fc_crc_ok = 0;
137 		*fcoe_enc_error = 0;
138 		*fcoe_eof = 0;
139 		*checksum = le16_to_cpu(desc->checksum_fcoe);
140 	}
141 
142 	*tcp_udp_csum_ok =
143 		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
144 	*udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
145 	*tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
146 	*ipv4_csum_ok =
147 		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
148 	*ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
149 	*ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
150 	*ipv4_fragment =
151 		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
152 	*fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
153 }
154 
155 #endif /* _CQ_ENET_DESC_H_ */
156