drivers/net/ethernet/stmicro/stmmac/descs.h

   1 /*******************************************************************************
   2   Header File to describe the DMA descriptors.
   3   Enhanced descriptors have been in case of DWMAC1000 Cores.
   4
   5   This program is free software; you can redistribute it and/or modify it
   6   under the terms and conditions of the GNU General Public License,
   7   version 2, as published by the Free Software Foundation.
   8
   9   This program is distributed in the hope it will be useful, but WITHOUT
  10   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12   more details.
  13
  14   You should have received a copy of the GNU General Public License along with
  15   this program; if not, write to the Free Software Foundation, Inc.,
  16   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17
  18   The full GNU General Public License is included in this distribution in
  19   the file called "COPYING".
  20
  21   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
  22 *******************************************************************************/
  23 struct dma_desc {
  24         /* Receive descriptor */
  25         union {
  26                 struct {
  27                         /* RDES0 */
  28                         u32 payload_csum_error:1;
  29                         u32 crc_error:1;
  30                         u32 dribbling:1;
  31                         u32 mii_error:1;
  32                         u32 receive_watchdog:1;
  33                         u32 frame_type:1;
  34                         u32 collision:1;
  35                         u32 ipc_csum_error:1;
  36                         u32 last_descriptor:1;
  37                         u32 first_descriptor:1;
  38                         u32 vlan_tag:1;
  39                         u32 overflow_error:1;
  40                         u32 length_error:1;
  41                         u32 sa_filter_fail:1;
  42                         u32 descriptor_error:1;
  43                         u32 error_summary:1;
  44                         u32 frame_length:14;
  45                         u32 da_filter_fail:1;
  46                         u32 own:1;
  47                         /* RDES1 */
  48                         u32 buffer1_size:11;
  49                         u32 buffer2_size:11;
  50                         u32 reserved1:2;
  51                         u32 second_address_chained:1;
  52                         u32 end_ring:1;
  53                         u32 reserved2:5;
  54                         u32 disable_ic:1;
  55
  56                 } rx;
  57                 struct {
  58                         /* RDES0 */
  59                         u32 payload_csum_error:1;
  60                         u32 crc_error:1;
  61                         u32 dribbling:1;
  62                         u32 error_gmii:1;
  63                         u32 receive_watchdog:1;
  64                         u32 frame_type:1;
  65                         u32 late_collision:1;
  66                         u32 ipc_csum_error:1;
  67                         u32 last_descriptor:1;
  68                         u32 first_descriptor:1;
  69                         u32 vlan_tag:1;
  70                         u32 overflow_error:1;
  71                         u32 length_error:1;
  72                         u32 sa_filter_fail:1;
  73                         u32 descriptor_error:1;
  74                         u32 error_summary:1;
  75                         u32 frame_length:14;
  76                         u32 da_filter_fail:1;
  77                         u32 own:1;
  78                         /* RDES1 */
  79                         u32 buffer1_size:13;
  80                         u32 reserved1:1;
  81                         u32 second_address_chained:1;
  82                         u32 end_ring:1;
  83                         u32 buffer2_size:13;
  84                         u32 reserved2:2;
  85                         u32 disable_ic:1;
  86                 } erx;          /* -- enhanced -- */
  87
  88                 /* Transmit descriptor */
  89                 struct {
  90                         /* TDES0 */
  91                         u32 deferred:1;
  92                         u32 underflow_error:1;
  93                         u32 excessive_deferral:1;
  94                         u32 collision_count:4;
  95                         u32 vlan_frame:1;
  96                         u32 excessive_collisions:1;
  97                         u32 late_collision:1;
  98                         u32 no_carrier:1;
  99                         u32 loss_carrier:1;
 100                         u32 payload_error:1;
 101                         u32 frame_flushed:1;
 102                         u32 jabber_timeout:1;
 103                         u32 error_summary:1;
 104                         u32 ip_header_error:1;
 105                         u32 time_stamp_status:1;
 106                         u32 reserved1:13;
 107                         u32 own:1;
 108                         /* TDES1 */
 109                         u32 buffer1_size:11;
 110                         u32 buffer2_size:11;
 111                         u32 time_stamp_enable:1;
 112                         u32 disable_padding:1;
 113                         u32 second_address_chained:1;
 114                         u32 end_ring:1;
 115                         u32 crc_disable:1;
 116                         u32 checksum_insertion:2;
 117                         u32 first_segment:1;
 118                         u32 last_segment:1;
 119                         u32 interrupt:1;
 120                 } tx;
 121                 struct {
 122                         /* TDES0 */
 123                         u32 deferred:1;
 124                         u32 underflow_error:1;
 125                         u32 excessive_deferral:1;
 126                         u32 collision_count:4;
 127                         u32 vlan_frame:1;
 128                         u32 excessive_collisions:1;
 129                         u32 late_collision:1;
 130                         u32 no_carrier:1;
 131                         u32 loss_carrier:1;
 132                         u32 payload_error:1;
 133                         u32 frame_flushed:1;
 134                         u32 jabber_timeout:1;
 135                         u32 error_summary:1;
 136                         u32 ip_header_error:1;
 137                         u32 time_stamp_status:1;
 138                         u32 reserved1:2;
 139                         u32 second_address_chained:1;
 140                         u32 end_ring:1;
 141                         u32 checksum_insertion:2;
 142                         u32 reserved2:1;
 143                         u32 time_stamp_enable:1;
 144                         u32 disable_padding:1;
 145                         u32 crc_disable:1;
 146                         u32 first_segment:1;
 147                         u32 last_segment:1;
 148                         u32 interrupt:1;
 149                         u32 own:1;
 150                         /* TDES1 */
 151                         u32 buffer1_size:13;
 152                         u32 reserved3:3;
 153                         u32 buffer2_size:13;
 154                         u32 reserved4:3;
 155                 } etx;          /* -- enhanced -- */
 156         } des01;
 157         unsigned int des2;
 158         unsigned int des3;
 159 };
 160
 161 /* Transmit checksum insertion control */
 162 enum tdes_csum_insertion {
 163         cic_disabled = 0,       /* Checksum Insertion Control */
 164         cic_only_ip = 1,        /* Only IP header */
 165         cic_no_pseudoheader = 2,        /* IP header but pseudoheader
 166                                          * is not calculated */
 167         cic_full = 3,           /* IP header and pseudoheader */
 168 };