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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_ */