LXR linux/drivers/scsi/fnic/cq_enet

   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 */
  24struct cq_enet_wq_desc {
  25        __le16 completed_index;
  26        __le16 q_number;
  27        u8 reserved[11];
  28        u8 type_color;
  29};
  30
  31static 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 */
  39struct 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
  93static 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_ */
 168