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   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  HCA query functions
   5  *
   6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   7  *           Christoph Raisch <raisch@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 "ehca_tools.h"
  43 #include "ehca_iverbs.h"
  44 #include "hcp_if.h"
  45
  46 static unsigned int limit_uint(unsigned int value)
  47 {
  48         return min_t(unsigned int, value, INT_MAX);
  49 }
  50
  51 int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
  52 {
  53         int i, ret = 0;
  54         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
  55                                               ib_device);
  56         struct hipz_query_hca *rblock;
  57
  58         static const u32 cap_mapping[] = {
  59                 IB_DEVICE_RESIZE_MAX_WR,      HCA_CAP_WQE_RESIZE,
  60                 IB_DEVICE_BAD_PKEY_CNTR,      HCA_CAP_BAD_P_KEY_CTR,
  61                 IB_DEVICE_BAD_QKEY_CNTR,      HCA_CAP_Q_KEY_VIOL_CTR,
  62                 IB_DEVICE_RAW_MULTI,          HCA_CAP_RAW_PACKET_MCAST,
  63                 IB_DEVICE_AUTO_PATH_MIG,      HCA_CAP_AUTO_PATH_MIG,
  64                 IB_DEVICE_CHANGE_PHY_PORT,    HCA_CAP_SQD_RTS_PORT_CHANGE,
  65                 IB_DEVICE_UD_AV_PORT_ENFORCE, HCA_CAP_AH_PORT_NR_CHECK,
  66                 IB_DEVICE_CURR_QP_STATE_MOD,  HCA_CAP_CUR_QP_STATE_MOD,
  67                 IB_DEVICE_SHUTDOWN_PORT,      HCA_CAP_SHUTDOWN_PORT,
  68                 IB_DEVICE_INIT_TYPE,          HCA_CAP_INIT_TYPE,
  69                 IB_DEVICE_PORT_ACTIVE_EVENT,  HCA_CAP_PORT_ACTIVE_EVENT,
  70         };
  71
  72         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
  73         if (!rblock) {
  74                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
  75                 return -ENOMEM;
  76         }
  77
  78         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
  79                 ehca_err(&shca->ib_device, "Can't query device properties");
  80                 ret = -EINVAL;
  81                 goto query_device1;
  82         }
  83
  84         memset(props, 0, sizeof(struct ib_device_attr));
  85         props->page_size_cap   = shca->hca_cap_mr_pgsize;
  86         props->fw_ver          = rblock->hw_ver;
  87         props->max_mr_size     = rblock->max_mr_size;
  88         props->vendor_id       = rblock->vendor_id >> 8;
  89         props->vendor_part_id  = rblock->vendor_part_id >> 16;
  90         props->hw_ver          = rblock->hw_ver;
  91         props->max_qp          = limit_uint(rblock->max_qp);
  92         props->max_qp_wr       = limit_uint(rblock->max_wqes_wq);
  93         props->max_sge         = limit_uint(rblock->max_sge);
  94         props->max_sge_rd      = limit_uint(rblock->max_sge_rd);
  95         props->max_cq          = limit_uint(rblock->max_cq);
  96         props->max_cqe         = limit_uint(rblock->max_cqe);
  97         props->max_mr          = limit_uint(rblock->max_mr);
  98         props->max_mw          = limit_uint(rblock->max_mw);
  99         props->max_pd          = limit_uint(rblock->max_pd);
 100         props->max_ah          = limit_uint(rblock->max_ah);
 101         props->max_ee          = limit_uint(rblock->max_rd_ee_context);
 102         props->max_rdd         = limit_uint(rblock->max_rd_domain);
 103         props->max_fmr         = limit_uint(rblock->max_mr);
 104         props->max_qp_rd_atom  = limit_uint(rblock->max_rr_qp);
 105         props->max_ee_rd_atom  = limit_uint(rblock->max_rr_ee_context);
 106         props->max_res_rd_atom = limit_uint(rblock->max_rr_hca);
 107         props->max_qp_init_rd_atom = limit_uint(rblock->max_act_wqs_qp);
 108         props->max_ee_init_rd_atom = limit_uint(rblock->max_act_wqs_ee_context);
 109
 110         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 111                 props->max_srq         = limit_uint(props->max_qp);
 112                 props->max_srq_wr      = limit_uint(props->max_qp_wr);
 113                 props->max_srq_sge     = 3;
 114         }
 115
 116         props->max_pkeys           = 16;
 117         /* Some FW versions say 0 here; insert sensible value in that case */
 118         props->local_ca_ack_delay  = rblock->local_ca_ack_delay ?
 119                 min_t(u8, rblock->local_ca_ack_delay, 255) : 12;
 120         props->max_raw_ipv6_qp     = limit_uint(rblock->max_raw_ipv6_qp);
 121         props->max_raw_ethy_qp     = limit_uint(rblock->max_raw_ethy_qp);
 122         props->max_mcast_grp       = limit_uint(rblock->max_mcast_grp);
 123         props->max_mcast_qp_attach = limit_uint(rblock->max_mcast_qp_attach);
 124         props->max_total_mcast_qp_attach
 125                 = limit_uint(rblock->max_total_mcast_qp_attach);
 126
 127         /* translate device capabilities */
 128         props->device_cap_flags = IB_DEVICE_SYS_IMAGE_GUID |
 129                 IB_DEVICE_RC_RNR_NAK_GEN | IB_DEVICE_N_NOTIFY_CQ;
 130         for (i = 0; i < ARRAY_SIZE(cap_mapping); i += 2)
 131                 if (rblock->hca_cap_indicators & cap_mapping[i + 1])
 132                         props->device_cap_flags |= cap_mapping[i];
 133
 134 query_device1:
 135         ehca_free_fw_ctrlblock(rblock);
 136
 137         return ret;
 138 }
 139
 140 static enum ib_mtu map_mtu(struct ehca_shca *shca, u32 fw_mtu)
 141 {
 142         switch (fw_mtu) {
 143         case 0x1:
 144                 return IB_MTU_256;
 145         case 0x2:
 146                 return IB_MTU_512;
 147         case 0x3:
 148                 return IB_MTU_1024;
 149         case 0x4:
 150                 return IB_MTU_2048;
 151         case 0x5:
 152                 return IB_MTU_4096;
 153         default:
 154                 ehca_err(&shca->ib_device, "Unknown MTU size: %x.",
 155                          fw_mtu);
 156                 return 0;
 157         }
 158 }
 159
 160 static u8 map_number_of_vls(struct ehca_shca *shca, u32 vl_cap)
 161 {
 162         switch (vl_cap) {
 163         case 0x1:
 164                 return 1;
 165         case 0x2:
 166                 return 2;
 167         case 0x3:
 168                 return 4;
 169         case 0x4:
 170                 return 8;
 171         case 0x5:
 172                 return 15;
 173         default:
 174                 ehca_err(&shca->ib_device, "invalid Vl Capability: %x.",
 175                          vl_cap);
 176                 return 0;
 177         }
 178 }
 179
 180 int ehca_query_port(struct ib_device *ibdev,
 181                     u8 port, struct ib_port_attr *props)
 182 {
 183         int ret = 0;
 184         u64 h_ret;
 185         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
 186                                               ib_device);
 187         struct hipz_query_port *rblock;
 188
 189         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 190         if (!rblock) {
 191                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 192                 return -ENOMEM;
 193         }
 194
 195         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 196         if (h_ret != H_SUCCESS) {
 197                 ehca_err(&shca->ib_device, "Can't query port properties");
 198                 ret = -EINVAL;
 199                 goto query_port1;
 200         }
 201
 202         memset(props, 0, sizeof(struct ib_port_attr));
 203
 204         props->active_mtu = props->max_mtu = map_mtu(shca, rblock->max_mtu);
 205         props->port_cap_flags  = rblock->capability_mask;
 206         props->gid_tbl_len     = rblock->gid_tbl_len;
 207         if (rblock->max_msg_sz)
 208                 props->max_msg_sz      = rblock->max_msg_sz;
 209         else
 210                 props->max_msg_sz      = 0x1 << 31;
 211         props->bad_pkey_cntr   = rblock->bad_pkey_cntr;
 212         props->qkey_viol_cntr  = rblock->qkey_viol_cntr;
 213         props->pkey_tbl_len    = rblock->pkey_tbl_len;
 214         props->lid             = rblock->lid;
 215         props->sm_lid          = rblock->sm_lid;
 216         props->lmc             = rblock->lmc;
 217         props->sm_sl           = rblock->sm_sl;
 218         props->subnet_timeout  = rblock->subnet_timeout;
 219         props->init_type_reply = rblock->init_type_reply;
 220         props->max_vl_num      = map_number_of_vls(shca, rblock->vl_cap);
 221
 222         if (rblock->state && rblock->phys_width) {
 223                 props->phys_state      = rblock->phys_pstate;
 224                 props->state           = rblock->phys_state;
 225                 props->active_width    = rblock->phys_width;
 226                 props->active_speed    = rblock->phys_speed;
 227         } else {
 228                 /* old firmware releases don't report physical
 229                  * port info, so use default values
 230                  */
 231                 props->phys_state      = 5;
 232                 props->state           = rblock->state;
 233                 props->active_width    = IB_WIDTH_12X;
 234                 props->active_speed    = 0x1;
 235         }
 236
 237 query_port1:
 238         ehca_free_fw_ctrlblock(rblock);
 239
 240         return ret;
 241 }
 242
 243 int ehca_query_sma_attr(struct ehca_shca *shca,
 244                         u8 port, struct ehca_sma_attr *attr)
 245 {
 246         int ret = 0;
 247         u64 h_ret;
 248         struct hipz_query_port *rblock;
 249
 250         rblock = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
 251         if (!rblock) {
 252                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 253                 return -ENOMEM;
 254         }
 255
 256         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 257         if (h_ret != H_SUCCESS) {
 258                 ehca_err(&shca->ib_device, "Can't query port properties");
 259                 ret = -EINVAL;
 260                 goto query_sma_attr1;
 261         }
 262
 263         memset(attr, 0, sizeof(struct ehca_sma_attr));
 264
 265         attr->lid    = rblock->lid;
 266         attr->lmc    = rblock->lmc;
 267         attr->sm_sl  = rblock->sm_sl;
 268         attr->sm_lid = rblock->sm_lid;
 269
 270         attr->pkey_tbl_len = rblock->pkey_tbl_len;
 271         memcpy(attr->pkeys, rblock->pkey_entries, sizeof(attr->pkeys));
 272
 273 query_sma_attr1:
 274         ehca_free_fw_ctrlblock(rblock);
 275
 276         return ret;
 277 }
 278
 279 int ehca_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 280 {
 281         int ret = 0;
 282         u64 h_ret;
 283         struct ehca_shca *shca;
 284         struct hipz_query_port *rblock;
 285
 286         shca = container_of(ibdev, struct ehca_shca, ib_device);
 287         if (index > 16) {
 288                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
 289                 return -EINVAL;
 290         }
 291
 292         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 293         if (!rblock) {
 294                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
 295                 return -ENOMEM;
 296         }
 297
 298         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 299         if (h_ret != H_SUCCESS) {
 300                 ehca_err(&shca->ib_device, "Can't query port properties");
 301                 ret = -EINVAL;
 302                 goto query_pkey1;
 303         }
 304
 305         memcpy(pkey, &rblock->pkey_entries + index, sizeof(u16));
 306
 307 query_pkey1:
 308         ehca_free_fw_ctrlblock(rblock);
 309
 310         return ret;
 311 }
 312
 313 int ehca_query_gid(struct ib_device *ibdev, u8 port,
 314                    int index, union ib_gid *gid)
 315 {
 316         int ret = 0;
 317         u64 h_ret;
 318         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
 319                                               ib_device);
 320         struct hipz_query_port *rblock;
 321
 322         if (index > 255) {
 323                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
 324                 return -EINVAL;
 325         }
 326
 327         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 328         if (!rblock) {
 329                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 330                 return -ENOMEM;
 331         }
 332
 333         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 334         if (h_ret != H_SUCCESS) {
 335                 ehca_err(&shca->ib_device, "Can't query port properties");
 336                 ret = -EINVAL;
 337                 goto query_gid1;
 338         }
 339
 340         memcpy(&gid->raw[0], &rblock->gid_prefix, sizeof(u64));
 341         memcpy(&gid->raw[8], &rblock->guid_entries[index], sizeof(u64));
 342
 343 query_gid1:
 344         ehca_free_fw_ctrlblock(rblock);
 345
 346         return ret;
 347 }
 348
 349 static const u32 allowed_port_caps = (
 350         IB_PORT_SM | IB_PORT_LED_INFO_SUP | IB_PORT_CM_SUP |
 351         IB_PORT_SNMP_TUNNEL_SUP | IB_PORT_DEVICE_MGMT_SUP |
 352         IB_PORT_VENDOR_CLASS_SUP);
 353
 354 int ehca_modify_port(struct ib_device *ibdev,
 355                      u8 port, int port_modify_mask,
 356                      struct ib_port_modify *props)
 357 {
 358         int ret = 0;
 359         struct ehca_shca *shca;
 360         struct hipz_query_port *rblock;
 361         u32 cap;
 362         u64 hret;
 363
 364         shca = container_of(ibdev, struct ehca_shca, ib_device);
 365         if ((props->set_port_cap_mask | props->clr_port_cap_mask)
 366             & ~allowed_port_caps) {
 367                 ehca_err(&shca->ib_device, "Non-changeable bits set in masks  "
 368                          "set=%x  clr=%x  allowed=%x", props->set_port_cap_mask,
 369                          props->clr_port_cap_mask, allowed_port_caps);
 370                 return -EINVAL;
 371         }
 372
 373         if (mutex_lock_interruptible(&shca->modify_mutex))
 374                 return -ERESTARTSYS;
 375
 376         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 377         if (!rblock) {
 378                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
 379                 ret = -ENOMEM;
 380                 goto modify_port1;
 381         }
 382
 383         hret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 384         if (hret != H_SUCCESS) {
 385                 ehca_err(&shca->ib_device, "Can't query port properties");
 386                 ret = -EINVAL;
 387                 goto modify_port2;
 388         }
 389
 390         cap = (rblock->capability_mask | props->set_port_cap_mask)
 391                 & ~props->clr_port_cap_mask;
 392
 393         hret = hipz_h_modify_port(shca->ipz_hca_handle, port,
 394                                   cap, props->init_type, port_modify_mask);
 395         if (hret != H_SUCCESS) {
 396                 ehca_err(&shca->ib_device, "Modify port failed  h_ret=%li",
 397                          hret);
 398                 ret = -EINVAL;
 399         }
 400
 401 modify_port2:
 402         ehca_free_fw_ctrlblock(rblock);
 403
 404 modify_port1:
 405         mutex_unlock(&shca->modify_mutex);
 406
 407         return ret;
 408 }