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cq_enet_desc.h
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1 /*
2  * Copyright 2008 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 #ifndef _CQ_ENET_DESC_H_
19 #define _CQ_ENET_DESC_H_
20 
21 #include "cq_desc.h"
22 
23 /* Ethernet completion queue descriptor: 16B */
24 struct cq_enet_wq_desc {
25  __le16 completed_index;
26  __le16 q_number;
27  u8 reserved[11];
28  u8 type_color;
29 };
30 
31 static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
32  u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
33 {
34  cq_desc_dec((struct cq_desc *)desc, type,
35  color, q_number, completed_index);
36 }
37 
38 /* Completion queue descriptor: Ethernet receive queue, 16B */
39 struct cq_enet_rq_desc {
40  __le16 completed_index_flags;
41  __le16 q_number_rss_type_flags;
42  __le32 rss_hash;
43  __le16 bytes_written_flags;
44  __le16 vlan;
45  __le16 checksum_fcoe;
46  u8 flags;
47  u8 type_color;
48 };
49 
50 #define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT (0x1 << 12)
51 #define CQ_ENET_RQ_DESC_FLAGS_FCOE (0x1 << 13)
52 #define CQ_ENET_RQ_DESC_FLAGS_EOP (0x1 << 14)
53 #define CQ_ENET_RQ_DESC_FLAGS_SOP (0x1 << 15)
54 
55 #define CQ_ENET_RQ_DESC_RSS_TYPE_BITS 4
56 #define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
57  ((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
58 #define CQ_ENET_RQ_DESC_RSS_TYPE_NONE 0
59 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4 1
60 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4 2
61 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6 3
62 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6 4
63 #define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX 5
64 #define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX 6
65 
66 #define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC (0x1 << 14)
67 
68 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS 14
69 #define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
70  ((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
71 #define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED (0x1 << 14)
72 #define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED (0x1 << 15)
73 
74 #define CQ_ENET_RQ_DESC_FCOE_SOF_BITS 4
75 #define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
76  ((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
77 #define CQ_ENET_RQ_DESC_FCOE_EOF_BITS 8
78 #define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
79  ((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
80 #define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT 8
81 
82 #define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK (0x1 << 0)
83 #define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK (0x1 << 0)
84 #define CQ_ENET_RQ_DESC_FLAGS_UDP (0x1 << 1)
85 #define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR (0x1 << 1)
86 #define CQ_ENET_RQ_DESC_FLAGS_TCP (0x1 << 2)
87 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK (0x1 << 3)
88 #define CQ_ENET_RQ_DESC_FLAGS_IPV6 (0x1 << 4)
89 #define CQ_ENET_RQ_DESC_FLAGS_IPV4 (0x1 << 5)
90 #define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT (0x1 << 6)
91 #define CQ_ENET_RQ_DESC_FLAGS_FCS_OK (0x1 << 7)
92 
93 static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
94  u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
95  u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
96  u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
97  u8 *vlan_stripped, u16 *vlan, u16 *checksum, u8 *fcoe_sof,
98  u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
99  u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
100  u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
101 {
102  u16 completed_index_flags = le16_to_cpu(desc->completed_index_flags);
103  u16 q_number_rss_type_flags =
104  le16_to_cpu(desc->q_number_rss_type_flags);
105  u16 bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
106 
107  cq_desc_dec((struct cq_desc *)desc, type,
108  color, q_number, completed_index);
109 
110  *ingress_port = (completed_index_flags &
111  CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
112  *fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
113  1 : 0;
114  *eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
115  1 : 0;
116  *sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
117  1 : 0;
118 
119  *rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
120  CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
121  *csum_not_calc = (q_number_rss_type_flags &
122  CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
123 
124  *rss_hash = le32_to_cpu(desc->rss_hash);
125 
126  *bytes_written = bytes_written_flags &
127  CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
128  *packet_error = (bytes_written_flags &
129  CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
130  *vlan_stripped = (bytes_written_flags &
131  CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
132 
133  *vlan = le16_to_cpu(desc->vlan);
134 
135  if (*fcoe) {
136  *fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
137  CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
138  *fcoe_fc_crc_ok = (desc->flags &
139  CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
140  *fcoe_enc_error = (desc->flags &
141  CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
142  *fcoe_eof = (u8)((desc->checksum_fcoe >>
143  CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
144  CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
145  *checksum = 0;
146  } else {
147  *fcoe_sof = 0;
148  *fcoe_fc_crc_ok = 0;
149  *fcoe_enc_error = 0;
150  *fcoe_eof = 0;
151  *checksum = le16_to_cpu(desc->checksum_fcoe);
152  }
153 
154  *tcp_udp_csum_ok =
155  (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
156  *udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
157  *tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
158  *ipv4_csum_ok =
159  (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
160  *ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
161  *ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
162  *ipv4_fragment =
163  (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
164  *fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
165 }
166 
167 #endif /* _CQ_ENET_DESC_H_ */
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