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

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  mcast  functions
   5  *
   6  *  Authors: Khadija Souissi <souissik@de.ibm.com>
   7  *           Waleri Fomin <fomin@de.ibm.com>
   8  *           Reinhard Ernst <rernst@de.ibm.com>
   9  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
  10  *           Heiko J Schick <schickhj@de.ibm.com>
  11  *
  12  *  Copyright (c) 2005 IBM Corporation
  13  *
  14  *  All rights reserved.
  15  *
  16  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  17  *  BSD.
  18  *
  19  * OpenIB BSD License
  20  *
  21  * Redistribution and use in source and binary forms, with or without
  22  * modification, are permitted provided that the following conditions are met:
  23  *
  24  * Redistributions of source code must retain the above copyright notice, this
  25  * list of conditions and the following disclaimer.
  26  *
  27  * Redistributions in binary form must reproduce the above copyright notice,
  28  * this list of conditions and the following disclaimer in the documentation
  29  * and/or other materials
  30  * provided with the distribution.
  31  *
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  33  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  35  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  36  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  37  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  38  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  39  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  40  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  41  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGE.
  43  */
  44
  45 #include <linux/module.h>
  46 #include <linux/err.h>
  47 #include "ehca_classes.h"
  48 #include "ehca_tools.h"
  49 #include "ehca_qes.h"
  50 #include "ehca_iverbs.h"
  51 #include "hcp_if.h"
  52
  53 #define MAX_MC_LID 0xFFFE
  54 #define MIN_MC_LID 0xC000       /* Multicast limits */
  55 #define EHCA_VALID_MULTICAST_GID(gid)  ((gid)[0] == 0xFF)
  56 #define EHCA_VALID_MULTICAST_LID(lid) \
  57         (((lid) >= MIN_MC_LID) && ((lid) <= MAX_MC_LID))
  58
  59 int ehca_attach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  60 {
  61         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
  62         struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
  63                                               ib_device);
  64         union ib_gid my_gid;
  65         u64 subnet_prefix, interface_id, h_ret;
  66
  67         if (ibqp->qp_type != IB_QPT_UD) {
  68                 ehca_err(ibqp->device, "invalid qp_type=%x", ibqp->qp_type);
  69                 return -EINVAL;
  70         }
  71
  72         if (!(EHCA_VALID_MULTICAST_GID(gid->raw))) {
  73                 ehca_err(ibqp->device, "invalid mulitcast gid");
  74                 return -EINVAL;
  75         } else if ((lid < MIN_MC_LID) || (lid > MAX_MC_LID)) {
  76                 ehca_err(ibqp->device, "invalid mulitcast lid=%x", lid);
  77                 return -EINVAL;
  78         }
  79
  80         memcpy(&my_gid.raw, gid->raw, sizeof(union ib_gid));
  81
  82         subnet_prefix = be64_to_cpu(my_gid.global.subnet_prefix);
  83         interface_id = be64_to_cpu(my_gid.global.interface_id);
  84         h_ret = hipz_h_attach_mcqp(shca->ipz_hca_handle,
  85                                    my_qp->ipz_qp_handle,
  86                                    my_qp->galpas.kernel,
  87                                    lid, subnet_prefix, interface_id);
  88         if (h_ret != H_SUCCESS)
  89                 ehca_err(ibqp->device,
  90                          "ehca_qp=%p qp_num=%x hipz_h_attach_mcqp() failed "
  91                          "h_ret=%lli", my_qp, ibqp->qp_num, h_ret);
  92
  93         return ehca2ib_return_code(h_ret);
  94 }
  95
  96 int ehca_detach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
  97 {
  98         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
  99         struct ehca_shca *shca = container_of(ibqp->pd->device,
 100                                               struct ehca_shca, ib_device);
 101         union ib_gid my_gid;
 102         u64 subnet_prefix, interface_id, h_ret;
 103
 104         if (ibqp->qp_type != IB_QPT_UD) {
 105                 ehca_err(ibqp->device, "invalid qp_type %x", ibqp->qp_type);
 106                 return -EINVAL;
 107         }
 108
 109         if (!(EHCA_VALID_MULTICAST_GID(gid->raw))) {
 110                 ehca_err(ibqp->device, "invalid mulitcast gid");
 111                 return -EINVAL;
 112         } else if ((lid < MIN_MC_LID) || (lid > MAX_MC_LID)) {
 113                 ehca_err(ibqp->device, "invalid mulitcast lid=%x", lid);
 114                 return -EINVAL;
 115         }
 116
 117         memcpy(&my_gid.raw, gid->raw, sizeof(union ib_gid));
 118
 119         subnet_prefix = be64_to_cpu(my_gid.global.subnet_prefix);
 120         interface_id = be64_to_cpu(my_gid.global.interface_id);
 121         h_ret = hipz_h_detach_mcqp(shca->ipz_hca_handle,
 122                                    my_qp->ipz_qp_handle,
 123                                    my_qp->galpas.kernel,
 124                                    lid, subnet_prefix, interface_id);
 125         if (h_ret != H_SUCCESS)
 126                 ehca_err(ibqp->device,
 127                          "ehca_qp=%p qp_num=%x hipz_h_detach_mcqp() failed "
 128                          "h_ret=%lli", my_qp, ibqp->qp_num, h_ret);
 129
 130         return ehca2ib_return_code(h_ret);
 131 }