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
  43 #include <linux/module.h>
  44 #include <linux/err.h>
  45 #include "ehca_classes.h"
  46 #include "ehca_tools.h"
  47 #include "ehca_qes.h"
  48 #include "ehca_iverbs.h"
  49 #include "hcp_if.h"
  50
  51
  52 /**
  53  * ehca_define_sqp - Defines special queue pair 1 (GSI QP). When special queue
  54  * pair is created successfully, the corresponding port gets active.
  55  *
  56  * Define Special Queue pair 0 (SMI QP) is still not supported.
  57  *
  58  * @qp_init_attr: Queue pair init attributes with port and queue pair type
  59  */
  60
  61 u64 ehca_define_sqp(struct ehca_shca *shca,
  62                     struct ehca_qp *ehca_qp,
  63                     struct ib_qp_init_attr *qp_init_attr)
  64 {
  65         u32 pma_qp_nr, bma_qp_nr;
  66         u64 ret;
  67         u8 port = qp_init_attr->port_num;
  68         int counter;
  69
  70         shca->sport[port - 1].port_state = IB_PORT_DOWN;
  71
  72         switch (qp_init_attr->qp_type) {
  73         case IB_QPT_SMI:
  74                 /* function not supported yet */
  75                 break;
  76         case IB_QPT_GSI:
  77                 ret = hipz_h_define_aqp1(shca->ipz_hca_handle,
  78                                          ehca_qp->ipz_qp_handle,
  79                                          ehca_qp->galpas.kernel,
  80                                          (u32) qp_init_attr->port_num,
  81                                          &pma_qp_nr, &bma_qp_nr);
  82
  83                 if (ret != H_SUCCESS) {
  84                         ehca_err(&shca->ib_device,
  85                                  "Can't define AQP1 for port %x. rc=%lx",
  86                                  port, ret);
  87                         return ret;
  88                 }
  89                 break;
  90         default:
  91                 ehca_err(&shca->ib_device, "invalid qp_type=%x",
  92                          qp_init_attr->qp_type);
  93                 return H_PARAMETER;
  94         }
  95
  96         for (counter = 0;
  97              shca->sport[port - 1].port_state != IB_PORT_ACTIVE &&
  98                      counter < ehca_port_act_time;
  99              counter++) {
 100                 ehca_dbg(&shca->ib_device, "... wait until port %x is active",
 101                          port);
 102                 msleep_interruptible(1000);
 103         }
 104
 105         if (counter == ehca_port_act_time) {
 106                 ehca_err(&shca->ib_device, "Port %x is not active.", port);
 107                 return H_HARDWARE;
 108         }
 109
 110         return H_SUCCESS;
 111 }