drivers/infiniband/hw/ehca/ehca_hca.c

   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 <linux/gfp.h>
  43
  44 #include "ehca_tools.h"
  45 #include "ehca_iverbs.h"
  46 #include "hcp_if.h"
  47
  48 static unsigned int limit_uint(unsigned int value)
  49 {
  50         return min_t(unsigned int, value, INT_MAX);
  51 }
  52
  53 int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
  54 {
  55         int i, ret = 0;
  56         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
  57                                               ib_device);
  58         struct hipz_query_hca *rblock;
  59
  60         static const u32 cap_mapping[] = {
  61                 IB_DEVICE_RESIZE_MAX_WR,      HCA_CAP_WQE_RESIZE,
  62                 IB_DEVICE_BAD_PKEY_CNTR,      HCA_CAP_BAD_P_KEY_CTR,
  63                 IB_DEVICE_BAD_QKEY_CNTR,      HCA_CAP_Q_KEY_VIOL_CTR,
  64                 IB_DEVICE_RAW_MULTI,          HCA_CAP_RAW_PACKET_MCAST,
  65                 IB_DEVICE_AUTO_PATH_MIG,      HCA_CAP_AUTO_PATH_MIG,
  66                 IB_DEVICE_CHANGE_PHY_PORT,    HCA_CAP_SQD_RTS_PORT_CHANGE,
  67                 IB_DEVICE_UD_AV_PORT_ENFORCE, HCA_CAP_AH_PORT_NR_CHECK,
  68                 IB_DEVICE_CURR_QP_STATE_MOD,  HCA_CAP_CUR_QP_STATE_MOD,
  69                 IB_DEVICE_SHUTDOWN_PORT,      HCA_CAP_SHUTDOWN_PORT,
  70                 IB_DEVICE_INIT_TYPE,          HCA_CAP_INIT_TYPE,
  71                 IB_DEVICE_PORT_ACTIVE_EVENT,  HCA_CAP_PORT_ACTIVE_EVENT,
  72         };
  73
  74         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
  75         if (!rblock) {
  76                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
  77                 return -ENOMEM;
  78         }
  79
  80         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
  81                 ehca_err(&shca->ib_device, "Can't query device properties");
  82                 ret = -EINVAL;
  83                 goto query_device1;
  84         }
  85
  86         memset(props, 0, sizeof(struct ib_device_attr));
  87         props->page_size_cap   = shca->hca_cap_mr_pgsize;
  88         props->fw_ver          = rblock->hw_ver;
  89         props->max_mr_size     = rblock->max_mr_size;
  90         props->vendor_id       = rblock->vendor_id >> 8;
  91         props->vendor_part_id  = rblock->vendor_part_id >> 16;
  92         props->hw_ver          = rblock->hw_ver;
  93         props->max_qp          = limit_uint(rblock->max_qp);
  94         props->max_qp_wr       = limit_uint(rblock->max_wqes_wq);
  95         props->max_sge         = limit_uint(rblock->max_sge);
  96         props->max_sge_rd      = limit_uint(rblock->max_sge_rd);
  97         props->max_cq          = limit_uint(rblock->max_cq);
  98         props->max_cqe         = limit_uint(rblock->max_cqe);
  99         props->max_mr          = limit_uint(rblock->max_mr);
 100         props->max_mw          = limit_uint(rblock->max_mw);
 101         props->max_pd          = limit_uint(rblock->max_pd);
 102         props->max_ah          = limit_uint(rblock->max_ah);
 103         props->max_ee          = limit_uint(rblock->max_rd_ee_context);
 104         props->max_rdd         = limit_uint(rblock->max_rd_domain);
 105         props->max_fmr         = limit_uint(rblock->max_mr);
 106         props->max_qp_rd_atom  = limit_uint(rblock->max_rr_qp);
 107         props->max_ee_rd_atom  = limit_uint(rblock->max_rr_ee_context);
 108         props->max_res_rd_atom = limit_uint(rblock->max_rr_hca);
 109         props->max_qp_init_rd_atom = limit_uint(rblock->max_act_wqs_qp);
 110         props->max_ee_init_rd_atom = limit_uint(rblock->max_act_wqs_ee_context);
 111
 112         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 113                 props->max_srq         = limit_uint(props->max_qp);
 114                 props->max_srq_wr      = limit_uint(props->max_qp_wr);
 115                 props->max_srq_sge     = 3;
 116         }
 117
 118         props->max_pkeys           = 16;
 119         /* Some FW versions say 0 here; insert sensible value in that case */
 120         props->local_ca_ack_delay  = rblock->local_ca_ack_delay ?
 121                 min_t(u8, rblock->local_ca_ack_delay, 255) : 12;
 122         props->max_raw_ipv6_qp     = limit_uint(rblock->max_raw_ipv6_qp);
 123         props->max_raw_ethy_qp     = limit_uint(rblock->max_raw_ethy_qp);
 124         props->max_mcast_grp       = limit_uint(rblock->max_mcast_grp);
 125         props->max_mcast_qp_attach = limit_uint(rblock->max_mcast_qp_attach);
 126         props->max_total_mcast_qp_attach
 127                 = limit_uint(rblock->max_total_mcast_qp_attach);
 128
 129         /* translate device capabilities */
 130         props->device_cap_flags = IB_DEVICE_SYS_IMAGE_GUID |
 131                 IB_DEVICE_RC_RNR_NAK_GEN | IB_DEVICE_N_NOTIFY_CQ;
 132         for (i = 0; i < ARRAY_SIZE(cap_mapping); i += 2)
 133                 if (rblock->hca_cap_indicators & cap_mapping[i + 1])
 134                         props->device_cap_flags |= cap_mapping[i];
 135
 136 query_device1:
 137         ehca_free_fw_ctrlblock(rblock);
 138
 139         return ret;
 140 }
 141
 142 static enum ib_mtu map_mtu(struct ehca_shca *shca, u32 fw_mtu)
 143 {
 144         switch (fw_mtu) {
 145         case 0x1:
 146                 return IB_MTU_256;
 147         case 0x2:
 148                 return IB_MTU_512;
 149         case 0x3:
 150                 return IB_MTU_1024;
 151         case 0x4:
 152                 return IB_MTU_2048;
 153         case 0x5:
 154                 return IB_MTU_4096;
 155         default:
 156                 ehca_err(&shca->ib_device, "Unknown MTU size: %x.",
 157                          fw_mtu);
 158                 return 0;
 159         }
 160 }
 161
 162 static u8 map_number_of_vls(struct ehca_shca *shca, u32 vl_cap)
 163 {
 164         switch (vl_cap) {
 165         case 0x1:
 166                 return 1;
 167         case 0x2:
 168                 return 2;
 169         case 0x3:
 170                 return 4;
 171         case 0x4:
 172                 return 8;
 173         case 0x5:
 174                 return 15;
 175         default:
 176                 ehca_err(&shca->ib_device, "invalid Vl Capability: %x.",
 177                          vl_cap);
 178                 return 0;
 179         }
 180 }
 181
 182 int ehca_query_port(struct ib_device *ibdev,
 183                     u8 port, struct ib_port_attr *props)
 184 {
 185         int ret = 0;
 186         u64 h_ret;
 187         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
 188                                               ib_device);
 189         struct hipz_query_port *rblock;
 190
 191         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 192         if (!rblock) {
 193                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 194                 return -ENOMEM;
 195         }
 196
 197         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 198         if (h_ret != H_SUCCESS) {
 199                 ehca_err(&shca->ib_device, "Can't query port properties");
 200                 ret = -EINVAL;
 201                 goto query_port1;
 202         }
 203
 204         memset(props, 0, sizeof(struct ib_port_attr));
 205
 206         props->active_mtu = props->max_mtu = map_mtu(shca, rblock->max_mtu);
 207         props->port_cap_flags  = rblock->capability_mask;
 208         props->gid_tbl_len     = rblock->gid_tbl_len;
 209         if (rblock->max_msg_sz)
 210                 props->max_msg_sz      = rblock->max_msg_sz;
 211         else
 212                 props->max_msg_sz      = 0x1 << 31;
 213         props->bad_pkey_cntr   = rblock->bad_pkey_cntr;
 214         props->qkey_viol_cntr  = rblock->qkey_viol_cntr;
 215         props->pkey_tbl_len    = rblock->pkey_tbl_len;
 216         props->lid             = rblock->lid;
 217         props->sm_lid          = rblock->sm_lid;
 218         props->lmc             = rblock->lmc;
 219         props->sm_sl           = rblock->sm_sl;
 220         props->subnet_timeout  = rblock->subnet_timeout;
 221         props->init_type_reply = rblock->init_type_reply;
 222         props->max_vl_num      = map_number_of_vls(shca, rblock->vl_cap);
 223
 224         if (rblock->state && rblock->phys_width) {
 225                 props->phys_state      = rblock->phys_pstate;
 226                 props->state           = rblock->phys_state;
 227                 props->active_width    = rblock->phys_width;
 228                 props->active_speed    = rblock->phys_speed;
 229         } else {
 230                 /* old firmware releases don't report physical
 231                  * port info, so use default values
 232                  */
 233                 props->phys_state      = 5;
 234                 props->state           = rblock->state;
 235                 props->active_width    = IB_WIDTH_12X;
 236                 props->active_speed    = 0x1;
 237         }
 238
 239 query_port1:
 240         ehca_free_fw_ctrlblock(rblock);
 241
 242         return ret;
 243 }
 244
 245 int ehca_query_sma_attr(struct ehca_shca *shca,
 246                         u8 port, struct ehca_sma_attr *attr)
 247 {
 248         int ret = 0;
 249         u64 h_ret;
 250         struct hipz_query_port *rblock;
 251
 252         rblock = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
 253         if (!rblock) {
 254                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 255                 return -ENOMEM;
 256         }
 257
 258         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 259         if (h_ret != H_SUCCESS) {
 260                 ehca_err(&shca->ib_device, "Can't query port properties");
 261                 ret = -EINVAL;
 262                 goto query_sma_attr1;
 263         }
 264
 265         memset(attr, 0, sizeof(struct ehca_sma_attr));
 266
 267         attr->lid    = rblock->lid;
 268         attr->lmc    = rblock->lmc;
 269         attr->sm_sl  = rblock->sm_sl;
 270         attr->sm_lid = rblock->sm_lid;
 271
 272         attr->pkey_tbl_len = rblock->pkey_tbl_len;
 273         memcpy(attr->pkeys, rblock->pkey_entries, sizeof(attr->pkeys));
 274
 275 query_sma_attr1:
 276         ehca_free_fw_ctrlblock(rblock);
 277
 278         return ret;
 279 }
 280
 281 int ehca_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 282 {
 283         int ret = 0;
 284         u64 h_ret;
 285         struct ehca_shca *shca;
 286         struct hipz_query_port *rblock;
 287
 288         shca = container_of(ibdev, struct ehca_shca, ib_device);
 289         if (index > 16) {
 290                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
 291                 return -EINVAL;
 292         }
 293
 294         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 295         if (!rblock) {
 296                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
 297                 return -ENOMEM;
 298         }
 299
 300         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 301         if (h_ret != H_SUCCESS) {
 302                 ehca_err(&shca->ib_device, "Can't query port properties");
 303                 ret = -EINVAL;
 304                 goto query_pkey1;
 305         }
 306
 307         memcpy(pkey, &rblock->pkey_entries + index, sizeof(u16));
 308
 309 query_pkey1:
 310         ehca_free_fw_ctrlblock(rblock);
 311
 312         return ret;
 313 }
 314
 315 int ehca_query_gid(struct ib_device *ibdev, u8 port,
 316                    int index, union ib_gid *gid)
 317 {
 318         int ret = 0;
 319         u64 h_ret;
 320         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
 321                                               ib_device);
 322         struct hipz_query_port *rblock;
 323
 324         if (index < 0 || index > 255) {
 325                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
 326                 return -EINVAL;
 327         }
 328
 329         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 330         if (!rblock) {
 331                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 332                 return -ENOMEM;
 333         }
 334
 335         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 336         if (h_ret != H_SUCCESS) {
 337                 ehca_err(&shca->ib_device, "Can't query port properties");
 338                 ret = -EINVAL;
 339                 goto query_gid1;
 340         }
 341
 342         memcpy(&gid->raw[0], &rblock->gid_prefix, sizeof(u64));
 343         memcpy(&gid->raw[8], &rblock->guid_entries[index], sizeof(u64));
 344
 345 query_gid1:
 346         ehca_free_fw_ctrlblock(rblock);
 347
 348         return ret;
 349 }
 350
 351 static const u32 allowed_port_caps = (
 352         IB_PORT_SM | IB_PORT_LED_INFO_SUP | IB_PORT_CM_SUP |
 353         IB_PORT_SNMP_TUNNEL_SUP | IB_PORT_DEVICE_MGMT_SUP |
 354         IB_PORT_VENDOR_CLASS_SUP);
 355
 356 int ehca_modify_port(struct ib_device *ibdev,
 357                      u8 port, int port_modify_mask,
 358                      struct ib_port_modify *props)
 359 {
 360         int ret = 0;
 361         struct ehca_shca *shca;
 362         struct hipz_query_port *rblock;
 363         u32 cap;
 364         u64 hret;
 365
 366         shca = container_of(ibdev, struct ehca_shca, ib_device);
 367         if ((props->set_port_cap_mask | props->clr_port_cap_mask)
 368             & ~allowed_port_caps) {
 369                 ehca_err(&shca->ib_device, "Non-changeable bits set in masks  "
 370                          "set=%x  clr=%x  allowed=%x", props->set_port_cap_mask,
 371                          props->clr_port_cap_mask, allowed_port_caps);
 372                 return -EINVAL;
 373         }
 374
 375         if (mutex_lock_interruptible(&shca->modify_mutex))
 376                 return -ERESTARTSYS;
 377
 378         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 379         if (!rblock) {
 380                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
 381                 ret = -ENOMEM;
 382                 goto modify_port1;
 383         }
 384
 385         hret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 386         if (hret != H_SUCCESS) {
 387                 ehca_err(&shca->ib_device, "Can't query port properties");
 388                 ret = -EINVAL;
 389                 goto modify_port2;
 390         }
 391
 392         cap = (rblock->capability_mask | props->set_port_cap_mask)
 393                 & ~props->clr_port_cap_mask;
 394
 395         hret = hipz_h_modify_port(shca->ipz_hca_handle, port,
 396                                   cap, props->init_type, port_modify_mask);
 397         if (hret != H_SUCCESS) {
 398                 ehca_err(&shca->ib_device, "Modify port failed  h_ret=%lli",
 399                          hret);
 400                 ret = -EINVAL;
 401         }
 402
 403 modify_port2:
 404         ehca_free_fw_ctrlblock(rblock);
 405
 406 modify_port1:
 407         mutex_unlock(&shca->modify_mutex);
 408
 409         return ret;
 410 }