release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/infiniband/hw/ehca/ehca_sqp.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  SQP functions
   5  *
   6  *  Authors: Khadija Souissi <souissi@de.ibm.com>
   7  *           Heiko J Schick <schickhj@de.ibm.com>
   8  *
   9  *  Copyright (c) 2005 IBM Corporation
  10  *
  11  *  All rights reserved.
  12  *
  13  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  14  *  BSD.
  15  *
  16  * OpenIB BSD License
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions are met:
  20  *
  21  * Redistributions of source code must retain the above copyright notice, this
  22  * list of conditions and the following disclaimer.
  23  *
  24  * Redistributions in binary form must reproduce the above copyright notice,
  25  * this list of conditions and the following disclaimer in the documentation
  26  * and/or other materials
  27  * provided with the distribution.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  30  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  33  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  34  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  36  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  37  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  39  * POSSIBILITY OF SUCH DAMAGE.
  40  */
  41
  42 #include <rdma/ib_mad.h>
  43
  44 #include "ehca_classes.h"
  45 #include "ehca_tools.h"
  46 #include "ehca_iverbs.h"
  47 #include "hcp_if.h"
  48
  49 #define IB_MAD_STATUS_REDIRECT          cpu_to_be16(0x0002)
  50 #define IB_MAD_STATUS_UNSUP_VERSION     cpu_to_be16(0x0004)
  51 #define IB_MAD_STATUS_UNSUP_METHOD      cpu_to_be16(0x0008)
  52
  53 #define IB_PMA_CLASS_PORT_INFO          cpu_to_be16(0x0001)
  54
  55 /**
  56  * ehca_define_sqp - Defines special queue pair 1 (GSI QP). When special queue
  57  * pair is created successfully, the corresponding port gets active.
  58  *
  59  * Define Special Queue pair 0 (SMI QP) is still not supported.
  60  *
  61  * @qp_init_attr: Queue pair init attributes with port and queue pair type
  62  */
  63
  64 u64 ehca_define_sqp(struct ehca_shca *shca,
  65                     struct ehca_qp *ehca_qp,
  66                     struct ib_qp_init_attr *qp_init_attr)
  67 {
  68         u32 pma_qp_nr, bma_qp_nr;
  69         u64 ret;
  70         u8 port = qp_init_attr->port_num;
  71         int counter;
  72
  73         shca->sport[port - 1].port_state = IB_PORT_DOWN;
  74
  75         switch (qp_init_attr->qp_type) {
  76         case IB_QPT_SMI:
  77                 /* function not supported yet */
  78                 break;
  79         case IB_QPT_GSI:
  80                 ret = hipz_h_define_aqp1(shca->ipz_hca_handle,
  81                                          ehca_qp->ipz_qp_handle,
  82                                          ehca_qp->galpas.kernel,
  83                                          (u32) qp_init_attr->port_num,
  84                                          &pma_qp_nr, &bma_qp_nr);
  85
  86                 if (ret != H_SUCCESS) {
  87                         ehca_err(&shca->ib_device,
  88                                  "Can't define AQP1 for port %x. h_ret=%lli",
  89                                  port, ret);
  90                         return ret;
  91                 }
  92                 shca->sport[port - 1].pma_qp_nr = pma_qp_nr;
  93                 ehca_dbg(&shca->ib_device, "port=%x pma_qp_nr=%x",
  94                          port, pma_qp_nr);
  95                 break;
  96         default:
  97                 ehca_err(&shca->ib_device, "invalid qp_type=%x",
  98                          qp_init_attr->qp_type);
  99                 return H_PARAMETER;
 100         }
 101
 102         if (ehca_nr_ports < 0) /* autodetect mode */
 103                 return H_SUCCESS;
 104
 105         for (counter = 0;
 106              shca->sport[port - 1].port_state != IB_PORT_ACTIVE &&
 107                      counter < ehca_port_act_time;
 108              counter++) {
 109                 ehca_dbg(&shca->ib_device, "... wait until port %x is active",
 110                          port);
 111                 msleep_interruptible(1000);
 112         }
 113
 114         if (counter == ehca_port_act_time) {
 115                 ehca_err(&shca->ib_device, "Port %x is not active.", port);
 116                 return H_HARDWARE;
 117         }
 118
 119         return H_SUCCESS;
 120 }
 121
 122 struct ib_perf {
 123         struct ib_mad_hdr mad_hdr;
 124         u8 reserved[40];
 125         u8 data[192];
 126 } __attribute__ ((packed));
 127
 128 /* TC/SL/FL packed into 32 bits, as in ClassPortInfo */
 129 struct tcslfl {
 130         u32 tc:8;
 131         u32 sl:4;
 132         u32 fl:20;
 133 } __attribute__ ((packed));
 134
 135 /* IP Version/TC/FL packed into 32 bits, as in GRH */
 136 struct vertcfl {
 137         u32 ver:4;
 138         u32 tc:8;
 139         u32 fl:20;
 140 } __attribute__ ((packed));
 141
 142 static int ehca_process_perf(struct ib_device *ibdev, u8 port_num,
 143                              struct ib_wc *in_wc, struct ib_grh *in_grh,
 144                              struct ib_mad *in_mad, struct ib_mad *out_mad)
 145 {
 146         struct ib_perf *in_perf = (struct ib_perf *)in_mad;
 147         struct ib_perf *out_perf = (struct ib_perf *)out_mad;
 148         struct ib_class_port_info *poi =
 149                 (struct ib_class_port_info *)out_perf->data;
 150         struct tcslfl *tcslfl =
 151                 (struct tcslfl *)&poi->redirect_tcslfl;
 152         struct ehca_shca *shca =
 153                 container_of(ibdev, struct ehca_shca, ib_device);
 154         struct ehca_sport *sport = &shca->sport[port_num - 1];
 155
 156         ehca_dbg(ibdev, "method=%x", in_perf->mad_hdr.method);
 157
 158         *out_mad = *in_mad;
 159
 160         if (in_perf->mad_hdr.class_version != 1) {
 161                 ehca_warn(ibdev, "Unsupported class_version=%x",
 162                           in_perf->mad_hdr.class_version);
 163                 out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_VERSION;
 164                 goto perf_reply;
 165         }
 166
 167         switch (in_perf->mad_hdr.method) {
 168         case IB_MGMT_METHOD_GET:
 169         case IB_MGMT_METHOD_SET:
 170                 /* set class port info for redirection */
 171                 out_perf->mad_hdr.attr_id = IB_PMA_CLASS_PORT_INFO;
 172                 out_perf->mad_hdr.status = IB_MAD_STATUS_REDIRECT;
 173                 memset(poi, 0, sizeof(*poi));
 174                 poi->base_version = 1;
 175                 poi->class_version = 1;
 176                 poi->resp_time_value = 18;
 177
 178                 /* copy local routing information from WC where applicable */
 179                 tcslfl->sl         = in_wc->sl;
 180                 poi->redirect_lid  =
 181                         sport->saved_attr.lid | in_wc->dlid_path_bits;
 182                 poi->redirect_qp   = sport->pma_qp_nr;
 183                 poi->redirect_qkey = IB_QP1_QKEY;
 184
 185                 ehca_query_pkey(ibdev, port_num, in_wc->pkey_index,
 186                                 &poi->redirect_pkey);
 187
 188                 /* if request was globally routed, copy route info */
 189                 if (in_grh) {
 190                         struct vertcfl *vertcfl =
 191                                 (struct vertcfl *)&in_grh->version_tclass_flow;
 192                         memcpy(poi->redirect_gid, in_grh->dgid.raw,
 193                                sizeof(poi->redirect_gid));
 194                         tcslfl->tc        = vertcfl->tc;
 195                         tcslfl->fl        = vertcfl->fl;
 196                 } else
 197                         /* else only fill in default GID */
 198                         ehca_query_gid(ibdev, port_num, 0,
 199                                        (union ib_gid *)&poi->redirect_gid);
 200
 201                 ehca_dbg(ibdev, "ehca_pma_lid=%x ehca_pma_qp=%x",
 202                          sport->saved_attr.lid, sport->pma_qp_nr);
 203                 break;
 204
 205         case IB_MGMT_METHOD_GET_RESP:
 206                 return IB_MAD_RESULT_FAILURE;
 207
 208         default:
 209                 out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_METHOD;
 210                 break;
 211         }
 212
 213 perf_reply:
 214         out_perf->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
 215
 216         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 217 }
 218
 219 int ehca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 220                      struct ib_wc *in_wc, struct ib_grh *in_grh,
 221                      struct ib_mad *in_mad, struct ib_mad *out_mad)
 222 {
 223         int ret;
 224
 225         if (!port_num || port_num > ibdev->phys_port_cnt || !in_wc)
 226                 return IB_MAD_RESULT_FAILURE;
 227
 228         /* accept only pma request */
 229         if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
 230                 return IB_MAD_RESULT_SUCCESS;
 231
 232         ehca_dbg(ibdev, "port_num=%x src_qp=%x", port_num, in_wc->src_qp);
 233         ret = ehca_process_perf(ibdev, port_num, in_wc, in_grh,
 234                                 in_mad, out_mad);
 235
 236         return ret;
 237 }