LXR linux/drivers/net/ethernet/cisco/enic/cq_enet

   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 */
  26struct cq_enet_wq_desc {
  27        __le16 completed_index;
  28        __le16 q_number;
  29        u8 reserved[11];
  30        u8 type_color;
  31};
  32
  33static 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 */
  41struct 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
 104static 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