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   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  Hardware request structures
   5  *
   6  *  Authors: Waleri Fomin <fomin@de.ibm.com>
   7  *           Reinhard Ernst <rernst@de.ibm.com>
   8  *           Christoph Raisch <raisch@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43
  44 #ifndef _EHCA_QES_H_
  45 #define _EHCA_QES_H_
  46
  47 #include "ehca_tools.h"
  48
  49 /* virtual scatter gather entry to specify remote adresses with length */
  50 struct ehca_vsgentry {
  51         u64 vaddr;
  52         u32 lkey;
  53         u32 length;
  54 };
  55
  56 #define GRH_FLAG_MASK        EHCA_BMASK_IBM( 7,  7)
  57 #define GRH_IPVERSION_MASK   EHCA_BMASK_IBM( 0,  3)
  58 #define GRH_TCLASS_MASK      EHCA_BMASK_IBM( 4, 12)
  59 #define GRH_FLOWLABEL_MASK   EHCA_BMASK_IBM(13, 31)
  60 #define GRH_PAYLEN_MASK      EHCA_BMASK_IBM(32, 47)
  61 #define GRH_NEXTHEADER_MASK  EHCA_BMASK_IBM(48, 55)
  62 #define GRH_HOPLIMIT_MASK    EHCA_BMASK_IBM(56, 63)
  63
  64 /*
  65  * Unreliable Datagram Address Vector Format
  66  * see IBTA Vol1 chapter 8.3 Global Routing Header
  67  */
  68 struct ehca_ud_av {
  69         u8 sl;
  70         u8 lnh;
  71         u16 dlid;
  72         u8 reserved1;
  73         u8 reserved2;
  74         u8 reserved3;
  75         u8 slid_path_bits;
  76         u8 reserved4;
  77         u8 ipd;
  78         u8 reserved5;
  79         u8 pmtu;
  80         u32 reserved6;
  81         u64 reserved7;
  82         union {
  83                 struct {
  84                         u64 word_0; /* always set to 6  */
  85                         /*should be 0x1B for IB transport */
  86                         u64 word_1;
  87                         u64 word_2;
  88                         u64 word_3;
  89                         u64 word_4;
  90                 } grh;
  91                 struct {
  92                         u32 wd_0;
  93                         u32 wd_1;
  94                         /* DWord_1 --> SGID */
  95
  96                         u32 sgid_wd3;
  97                         u32 sgid_wd2;
  98
  99                         u32 sgid_wd1;
 100                         u32 sgid_wd0;
 101                         /* DWord_3 --> DGID */
 102
 103                         u32 dgid_wd3;
 104                         u32 dgid_wd2;
 105
 106                         u32 dgid_wd1;
 107                         u32 dgid_wd0;
 108                 } grh_l;
 109         };
 110 };
 111
 112 /* maximum number of sg entries allowed in a WQE */
 113 #define MAX_WQE_SG_ENTRIES 252
 114
 115 #define WQE_OPTYPE_SEND             0x80
 116 #define WQE_OPTYPE_RDMAREAD         0x40
 117 #define WQE_OPTYPE_RDMAWRITE        0x20
 118 #define WQE_OPTYPE_CMPSWAP          0x10
 119 #define WQE_OPTYPE_FETCHADD         0x08
 120 #define WQE_OPTYPE_BIND             0x04
 121
 122 #define WQE_WRFLAG_REQ_SIGNAL_COM   0x80
 123 #define WQE_WRFLAG_FENCE            0x40
 124 #define WQE_WRFLAG_IMM_DATA_PRESENT 0x20
 125 #define WQE_WRFLAG_SOLIC_EVENT      0x10
 126
 127 #define WQEF_CACHE_HINT             0x80
 128 #define WQEF_CACHE_HINT_RD_WR       0x40
 129 #define WQEF_TIMED_WQE              0x20
 130 #define WQEF_PURGE                  0x08
 131 #define WQEF_HIGH_NIBBLE            0xF0
 132
 133 #define MW_BIND_ACCESSCTRL_R_WRITE   0x40
 134 #define MW_BIND_ACCESSCTRL_R_READ    0x20
 135 #define MW_BIND_ACCESSCTRL_R_ATOMIC  0x10
 136
 137 struct ehca_wqe {
 138         u64 work_request_id;
 139         u8 optype;
 140         u8 wr_flag;
 141         u16 pkeyi;
 142         u8 wqef;
 143         u8 nr_of_data_seg;
 144         u16 wqe_provided_slid;
 145         u32 destination_qp_number;
 146         u32 resync_psn_sqp;
 147         u32 local_ee_context_qkey;
 148         u32 immediate_data;
 149         union {
 150                 struct {
 151                         u64 remote_virtual_adress;
 152                         u32 rkey;
 153                         u32 reserved;
 154                         u64 atomic_1st_op_dma_len;
 155                         u64 atomic_2nd_op;
 156                         struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES];
 157
 158                 } nud;
 159                 struct {
 160                         u64 ehca_ud_av_ptr;
 161                         u64 reserved1;
 162                         u64 reserved2;
 163                         u64 reserved3;
 164                         struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES];
 165                 } ud_avp;
 166                 struct {
 167                         struct ehca_ud_av ud_av;
 168                         struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES -
 169                                                      2];
 170                 } ud_av;
 171                 struct {
 172                         u64 reserved0;
 173                         u64 reserved1;
 174                         u64 reserved2;
 175                         u64 reserved3;
 176                         struct ehca_vsgentry sg_list[MAX_WQE_SG_ENTRIES];
 177                 } all_rcv;
 178
 179                 struct {
 180                         u64 reserved;
 181                         u32 rkey;
 182                         u32 old_rkey;
 183                         u64 reserved1;
 184                         u64 reserved2;
 185                         u64 virtual_address;
 186                         u32 reserved3;
 187                         u32 length;
 188                         u32 reserved4;
 189                         u16 reserved5;
 190                         u8 reserved6;
 191                         u8 lr_ctl;
 192                         u32 lkey;
 193                         u32 reserved7;
 194                         u64 reserved8;
 195                         u64 reserved9;
 196                         u64 reserved10;
 197                         u64 reserved11;
 198                 } bind;
 199                 struct {
 200                         u64 reserved12;
 201                         u64 reserved13;
 202                         u32 size;
 203                         u32 start;
 204                 } inline_data;
 205         } u;
 206
 207 };
 208
 209 #define WC_SEND_RECEIVE EHCA_BMASK_IBM(0, 0)
 210 #define WC_IMM_DATA     EHCA_BMASK_IBM(1, 1)
 211 #define WC_GRH_PRESENT  EHCA_BMASK_IBM(2, 2)
 212 #define WC_SE_BIT       EHCA_BMASK_IBM(3, 3)
 213 #define WC_STATUS_ERROR_BIT 0x80000000
 214 #define WC_STATUS_REMOTE_ERROR_FLAGS 0x0000F800
 215 #define WC_STATUS_PURGE_BIT 0x10
 216
 217 struct ehca_cqe {
 218         u64 work_request_id;
 219         u8 optype;
 220         u8 w_completion_flags;
 221         u16 reserved1;
 222         u32 nr_bytes_transferred;
 223         u32 immediate_data;
 224         u32 local_qp_number;
 225         u8 freed_resource_count;
 226         u8 service_level;
 227         u16 wqe_count;
 228         u32 qp_token;
 229         u32 qkey_ee_token;
 230         u32 remote_qp_number;
 231         u16 dlid;
 232         u16 rlid;
 233         u16 reserved2;
 234         u16 pkey_index;
 235         u32 cqe_timestamp;
 236         u32 wqe_timestamp;
 237         u8 wqe_timestamp_valid;
 238         u8 reserved3;
 239         u8 reserved4;
 240         u8 cqe_flags;
 241         u32 status;
 242 };
 243
 244 struct ehca_eqe {
 245         u64 entry;
 246 };
 247
 248 struct ehca_mrte {
 249         u64 starting_va;
 250         u64 length; /* length of memory region in bytes*/
 251         u32 pd;
 252         u8 key_instance;
 253         u8 pagesize;
 254         u8 mr_control;
 255         u8 local_remote_access_ctrl;
 256         u8 reserved[0x20 - 0x18];
 257         u64 at_pointer[4];
 258 };
 259 #endif /*_EHCA_QES_H_*/