1 /*
2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
4  *
5  * This program is free software; you may redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; version 2 of the License.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16  * SOFTWARE.
17  *
18  */
19 
20 #ifndef _CQ_ENET_DESC_H_
21 #define _CQ_ENET_DESC_H_
22 
23 #include "cq_desc.h"
24 
25 /* Ethernet completion queue descriptor: 16B */
26 struct cq_enet_wq_desc {
27 	__le16 completed_index;
28 	__le16 q_number;
29 	u8 reserved[11];
30 	u8 type_color;
31 };
32 
33 static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
34 	u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
35 {
36 	cq_desc_dec((struct cq_desc *)desc, type,
37 		color, q_number, completed_index);
38 }
39 
40 /* Completion queue descriptor: Ethernet receive queue, 16B */
41 struct cq_enet_rq_desc {
42 	__le16 completed_index_flags;
43 	__le16 q_number_rss_type_flags;
44 	__le32 rss_hash;
45 	__le16 bytes_written_flags;
46 	__le16 vlan;
47 	__le16 checksum_fcoe;
48 	u8 flags;
49 	u8 type_color;
50 };
51 
52 #define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT          (0x1 << 12)
53 #define CQ_ENET_RQ_DESC_FLAGS_FCOE                  (0x1 << 13)
54 #define CQ_ENET_RQ_DESC_FLAGS_EOP                   (0x1 << 14)
55 #define CQ_ENET_RQ_DESC_FLAGS_SOP                   (0x1 << 15)
56 
57 #define CQ_ENET_RQ_DESC_RSS_TYPE_BITS               4
58 #define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
59 	((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
60 #define CQ_ENET_RQ_DESC_RSS_TYPE_NONE               0
61 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4               1
62 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4           2
63 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6               3
64 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6           4
65 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX            5
66 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX        6
67 
68 #define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC         (0x1 << 14)
69 
70 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS          14
71 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
72 	((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
73 #define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED             (0x1 << 14)
74 #define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED         (0x1 << 15)
75 
76 #define CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_BITS          12
77 #define CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK \
78 	((1 << CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_BITS) - 1)
79 #define CQ_ENET_RQ_DESC_VLAN_TCI_CFI_MASK           (0x1 << 12)
80 #define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_BITS     3
81 #define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_MASK \
82 	((1 << CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_BITS) - 1)
83 #define CQ_ENET_RQ_DESC_VLAN_TCI_USER_PRIO_SHIFT    13
84 
85 #define CQ_ENET_RQ_DESC_FCOE_SOF_BITS               8
86 #define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
87 	((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
88 #define CQ_ENET_RQ_DESC_FCOE_EOF_BITS               8
89 #define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
90 	((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
91 #define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT              8
92 
93 #define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK       (0x1 << 0)
94 #define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK              (0x1 << 0)
95 #define CQ_ENET_RQ_DESC_FLAGS_UDP                   (0x1 << 1)
96 #define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR              (0x1 << 1)
97 #define CQ_ENET_RQ_DESC_FLAGS_TCP                   (0x1 << 2)
98 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK          (0x1 << 3)
99 #define CQ_ENET_RQ_DESC_FLAGS_IPV6                  (0x1 << 4)
100 #define CQ_ENET_RQ_DESC_FLAGS_IPV4                  (0x1 << 5)
101 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT         (0x1 << 6)
102 #define CQ_ENET_RQ_DESC_FLAGS_FCS_OK                (0x1 << 7)
103 
104 static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
105 	u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
106 	u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
107 	u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
108 	u8 *vlan_stripped, u16 *vlan_tci, u16 *checksum, u8 *fcoe_sof,
109 	u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
110 	u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
111 	u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
112 {
113 	u16 completed_index_flags;
114 	u16 q_number_rss_type_flags;
115 	u16 bytes_written_flags;
116 
117 	cq_desc_dec((struct cq_desc *)desc, type,
118 		color, q_number, completed_index);
119 
120 	completed_index_flags = le16_to_cpu(desc->completed_index_flags);
121 	q_number_rss_type_flags =
122 		le16_to_cpu(desc->q_number_rss_type_flags);
123 	bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
124 
125 	*ingress_port = (completed_index_flags &
126 		CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
127 	*fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
128 		1 : 0;
129 	*eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
130 		1 : 0;
131 	*sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
132 		1 : 0;
133 
134 	*rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
135 		CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
136 	*csum_not_calc = (q_number_rss_type_flags &
137 		CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
138 
139 	*rss_hash = le32_to_cpu(desc->rss_hash);
140 
141 	*bytes_written = bytes_written_flags &
142 		CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
143 	*packet_error = (bytes_written_flags &
144 		CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
145 	*vlan_stripped = (bytes_written_flags &
146 		CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
147 
148 	/*
149 	 * Tag Control Information(16) = user_priority(3) + cfi(1) + vlan(12)
150 	 */
151 	*vlan_tci = le16_to_cpu(desc->vlan);
152 
153 	if (*fcoe) {
154 		*fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
155 			CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
156 		*fcoe_fc_crc_ok = (desc->flags &
157 			CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
158 		*fcoe_enc_error = (desc->flags &
159 			CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
160 		*fcoe_eof = (u8)((le16_to_cpu(desc->checksum_fcoe) >>
161 			CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
162 			CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
163 		*checksum = 0;
164 	} else {
165 		*fcoe_sof = 0;
166 		*fcoe_fc_crc_ok = 0;
167 		*fcoe_enc_error = 0;
168 		*fcoe_eof = 0;
169 		*checksum = le16_to_cpu(desc->checksum_fcoe);
170 	}
171 
172 	*tcp_udp_csum_ok =
173 		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
174 	*udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
175 	*tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
176 	*ipv4_csum_ok =
177 		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
178 	*ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
179 	*ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
180 	*ipv4_fragment =
181 		(desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
182 	*fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
183 }
184 
185 #endif /* _CQ_ENET_DESC_H_ */
186