drivers/staging/rdma/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                       struct ib_udata *uhw)
  55 {
  56         int i, ret = 0;
  57         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
  58                                               ib_device);
  59         struct hipz_query_hca *rblock;
  60
  61         static const u32 cap_mapping[] = {
  62                 IB_DEVICE_RESIZE_MAX_WR,      HCA_CAP_WQE_RESIZE,
  63                 IB_DEVICE_BAD_PKEY_CNTR,      HCA_CAP_BAD_P_KEY_CTR,
  64                 IB_DEVICE_BAD_QKEY_CNTR,      HCA_CAP_Q_KEY_VIOL_CTR,
  65                 IB_DEVICE_RAW_MULTI,          HCA_CAP_RAW_PACKET_MCAST,
  66                 IB_DEVICE_AUTO_PATH_MIG,      HCA_CAP_AUTO_PATH_MIG,
  67                 IB_DEVICE_CHANGE_PHY_PORT,    HCA_CAP_SQD_RTS_PORT_CHANGE,
  68                 IB_DEVICE_UD_AV_PORT_ENFORCE, HCA_CAP_AH_PORT_NR_CHECK,
  69                 IB_DEVICE_CURR_QP_STATE_MOD,  HCA_CAP_CUR_QP_STATE_MOD,
  70                 IB_DEVICE_SHUTDOWN_PORT,      HCA_CAP_SHUTDOWN_PORT,
  71                 IB_DEVICE_INIT_TYPE,          HCA_CAP_INIT_TYPE,
  72                 IB_DEVICE_PORT_ACTIVE_EVENT,  HCA_CAP_PORT_ACTIVE_EVENT,
  73         };
  74
  75         if (uhw->inlen || uhw->outlen)
  76                 return -EINVAL;
  77
  78         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
  79         if (!rblock) {
  80                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
  81                 return -ENOMEM;
  82         }
  83
  84         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
  85                 ehca_err(&shca->ib_device, "Can't query device properties");
  86                 ret = -EINVAL;
  87                 goto query_device1;
  88         }
  89
  90         memset(props, 0, sizeof(struct ib_device_attr));
  91         props->page_size_cap   = shca->hca_cap_mr_pgsize;
  92         props->fw_ver          = rblock->hw_ver;
  93         props->max_mr_size     = rblock->max_mr_size;
  94         props->vendor_id       = rblock->vendor_id >> 8;
  95         props->vendor_part_id  = rblock->vendor_part_id >> 16;
  96         props->hw_ver          = rblock->hw_ver;
  97         props->max_qp          = limit_uint(rblock->max_qp);
  98         props->max_qp_wr       = limit_uint(rblock->max_wqes_wq);
  99         props->max_sge         = limit_uint(rblock->max_sge);
 100         props->max_sge_rd      = limit_uint(rblock->max_sge_rd);
 101         props->max_cq          = limit_uint(rblock->max_cq);
 102         props->max_cqe         = limit_uint(rblock->max_cqe);
 103         props->max_mr          = limit_uint(rblock->max_mr);
 104         props->max_mw          = limit_uint(rblock->max_mw);
 105         props->max_pd          = limit_uint(rblock->max_pd);
 106         props->max_ah          = limit_uint(rblock->max_ah);
 107         props->max_ee          = limit_uint(rblock->max_rd_ee_context);
 108         props->max_rdd         = limit_uint(rblock->max_rd_domain);
 109         props->max_fmr         = limit_uint(rblock->max_mr);
 110         props->max_qp_rd_atom  = limit_uint(rblock->max_rr_qp);
 111         props->max_ee_rd_atom  = limit_uint(rblock->max_rr_ee_context);
 112         props->max_res_rd_atom = limit_uint(rblock->max_rr_hca);
 113         props->max_qp_init_rd_atom = limit_uint(rblock->max_act_wqs_qp);
 114         props->max_ee_init_rd_atom = limit_uint(rblock->max_act_wqs_ee_context);
 115
 116         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 117                 props->max_srq         = limit_uint(props->max_qp);
 118                 props->max_srq_wr      = limit_uint(props->max_qp_wr);
 119                 props->max_srq_sge     = 3;
 120         }
 121
 122         props->max_pkeys           = 16;
 123         /* Some FW versions say 0 here; insert sensible value in that case */
 124         props->local_ca_ack_delay  = rblock->local_ca_ack_delay ?
 125                 min_t(u8, rblock->local_ca_ack_delay, 255) : 12;
 126         props->max_raw_ipv6_qp     = limit_uint(rblock->max_raw_ipv6_qp);
 127         props->max_raw_ethy_qp     = limit_uint(rblock->max_raw_ethy_qp);
 128         props->max_mcast_grp       = limit_uint(rblock->max_mcast_grp);
 129         props->max_mcast_qp_attach = limit_uint(rblock->max_mcast_qp_attach);
 130         props->max_total_mcast_qp_attach
 131                 = limit_uint(rblock->max_total_mcast_qp_attach);
 132
 133         /* translate device capabilities */
 134         props->device_cap_flags = IB_DEVICE_SYS_IMAGE_GUID |
 135                 IB_DEVICE_RC_RNR_NAK_GEN | IB_DEVICE_N_NOTIFY_CQ;
 136         for (i = 0; i < ARRAY_SIZE(cap_mapping); i += 2)
 137                 if (rblock->hca_cap_indicators & cap_mapping[i + 1])
 138                         props->device_cap_flags |= cap_mapping[i];
 139
 140 query_device1:
 141         ehca_free_fw_ctrlblock(rblock);
 142
 143         return ret;
 144 }
 145
 146 static enum ib_mtu map_mtu(struct ehca_shca *shca, u32 fw_mtu)
 147 {
 148         switch (fw_mtu) {
 149         case 0x1:
 150                 return IB_MTU_256;
 151         case 0x2:
 152                 return IB_MTU_512;
 153         case 0x3:
 154                 return IB_MTU_1024;
 155         case 0x4:
 156                 return IB_MTU_2048;
 157         case 0x5:
 158                 return IB_MTU_4096;
 159         default:
 160                 ehca_err(&shca->ib_device, "Unknown MTU size: %x.",
 161                          fw_mtu);
 162                 return 0;
 163         }
 164 }
 165
 166 static u8 map_number_of_vls(struct ehca_shca *shca, u32 vl_cap)
 167 {
 168         switch (vl_cap) {
 169         case 0x1:
 170                 return 1;
 171         case 0x2:
 172                 return 2;
 173         case 0x3:
 174                 return 4;
 175         case 0x4:
 176                 return 8;
 177         case 0x5:
 178                 return 15;
 179         default:
 180                 ehca_err(&shca->ib_device, "invalid Vl Capability: %x.",
 181                          vl_cap);
 182                 return 0;
 183         }
 184 }
 185
 186 int ehca_query_port(struct ib_device *ibdev,
 187                     u8 port, struct ib_port_attr *props)
 188 {
 189         int ret = 0;
 190         u64 h_ret;
 191         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
 192                                               ib_device);
 193         struct hipz_query_port *rblock;
 194
 195         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 196         if (!rblock) {
 197                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 198                 return -ENOMEM;
 199         }
 200
 201         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 202         if (h_ret != H_SUCCESS) {
 203                 ehca_err(&shca->ib_device, "Can't query port properties");
 204                 ret = -EINVAL;
 205                 goto query_port1;
 206         }
 207
 208         memset(props, 0, sizeof(struct ib_port_attr));
 209
 210         props->active_mtu = props->max_mtu = map_mtu(shca, rblock->max_mtu);
 211         props->port_cap_flags  = rblock->capability_mask;
 212         props->gid_tbl_len     = rblock->gid_tbl_len;
 213         if (rblock->max_msg_sz)
 214                 props->max_msg_sz      = rblock->max_msg_sz;
 215         else
 216                 props->max_msg_sz      = 0x1 << 31;
 217         props->bad_pkey_cntr   = rblock->bad_pkey_cntr;
 218         props->qkey_viol_cntr  = rblock->qkey_viol_cntr;
 219         props->pkey_tbl_len    = rblock->pkey_tbl_len;
 220         props->lid             = rblock->lid;
 221         props->sm_lid          = rblock->sm_lid;
 222         props->lmc             = rblock->lmc;
 223         props->sm_sl           = rblock->sm_sl;
 224         props->subnet_timeout  = rblock->subnet_timeout;
 225         props->init_type_reply = rblock->init_type_reply;
 226         props->max_vl_num      = map_number_of_vls(shca, rblock->vl_cap);
 227
 228         if (rblock->state && rblock->phys_width) {
 229                 props->phys_state      = rblock->phys_pstate;
 230                 props->state           = rblock->phys_state;
 231                 props->active_width    = rblock->phys_width;
 232                 props->active_speed    = rblock->phys_speed;
 233         } else {
 234                 /* old firmware releases don't report physical
 235                  * port info, so use default values
 236                  */
 237                 props->phys_state      = 5;
 238                 props->state           = rblock->state;
 239                 props->active_width    = IB_WIDTH_12X;
 240                 props->active_speed    = IB_SPEED_SDR;
 241         }
 242
 243 query_port1:
 244         ehca_free_fw_ctrlblock(rblock);
 245
 246         return ret;
 247 }
 248
 249 int ehca_query_sma_attr(struct ehca_shca *shca,
 250                         u8 port, struct ehca_sma_attr *attr)
 251 {
 252         int ret = 0;
 253         u64 h_ret;
 254         struct hipz_query_port *rblock;
 255
 256         rblock = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
 257         if (!rblock) {
 258                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 259                 return -ENOMEM;
 260         }
 261
 262         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 263         if (h_ret != H_SUCCESS) {
 264                 ehca_err(&shca->ib_device, "Can't query port properties");
 265                 ret = -EINVAL;
 266                 goto query_sma_attr1;
 267         }
 268
 269         memset(attr, 0, sizeof(struct ehca_sma_attr));
 270
 271         attr->lid    = rblock->lid;
 272         attr->lmc    = rblock->lmc;
 273         attr->sm_sl  = rblock->sm_sl;
 274         attr->sm_lid = rblock->sm_lid;
 275
 276         attr->pkey_tbl_len = rblock->pkey_tbl_len;
 277         memcpy(attr->pkeys, rblock->pkey_entries, sizeof(attr->pkeys));
 278
 279 query_sma_attr1:
 280         ehca_free_fw_ctrlblock(rblock);
 281
 282         return ret;
 283 }
 284
 285 int ehca_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 286 {
 287         int ret = 0;
 288         u64 h_ret;
 289         struct ehca_shca *shca;
 290         struct hipz_query_port *rblock;
 291
 292         shca = container_of(ibdev, struct ehca_shca, ib_device);
 293         if (index > 16) {
 294                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
 295                 return -EINVAL;
 296         }
 297
 298         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 299         if (!rblock) {
 300                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
 301                 return -ENOMEM;
 302         }
 303
 304         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 305         if (h_ret != H_SUCCESS) {
 306                 ehca_err(&shca->ib_device, "Can't query port properties");
 307                 ret = -EINVAL;
 308                 goto query_pkey1;
 309         }
 310
 311         memcpy(pkey, &rblock->pkey_entries + index, sizeof(u16));
 312
 313 query_pkey1:
 314         ehca_free_fw_ctrlblock(rblock);
 315
 316         return ret;
 317 }
 318
 319 int ehca_query_gid(struct ib_device *ibdev, u8 port,
 320                    int index, union ib_gid *gid)
 321 {
 322         int ret = 0;
 323         u64 h_ret;
 324         struct ehca_shca *shca = container_of(ibdev, struct ehca_shca,
 325                                               ib_device);
 326         struct hipz_query_port *rblock;
 327
 328         if (index < 0 || index > 255) {
 329                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
 330                 return -EINVAL;
 331         }
 332
 333         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 334         if (!rblock) {
 335                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 336                 return -ENOMEM;
 337         }
 338
 339         h_ret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 340         if (h_ret != H_SUCCESS) {
 341                 ehca_err(&shca->ib_device, "Can't query port properties");
 342                 ret = -EINVAL;
 343                 goto query_gid1;
 344         }
 345
 346         memcpy(&gid->raw[0], &rblock->gid_prefix, sizeof(u64));
 347         memcpy(&gid->raw[8], &rblock->guid_entries[index], sizeof(u64));
 348
 349 query_gid1:
 350         ehca_free_fw_ctrlblock(rblock);
 351
 352         return ret;
 353 }
 354
 355 static const u32 allowed_port_caps = (
 356         IB_PORT_SM | IB_PORT_LED_INFO_SUP | IB_PORT_CM_SUP |
 357         IB_PORT_SNMP_TUNNEL_SUP | IB_PORT_DEVICE_MGMT_SUP |
 358         IB_PORT_VENDOR_CLASS_SUP);
 359
 360 int ehca_modify_port(struct ib_device *ibdev,
 361                      u8 port, int port_modify_mask,
 362                      struct ib_port_modify *props)
 363 {
 364         int ret = 0;
 365         struct ehca_shca *shca;
 366         struct hipz_query_port *rblock;
 367         u32 cap;
 368         u64 hret;
 369
 370         shca = container_of(ibdev, struct ehca_shca, ib_device);
 371         if ((props->set_port_cap_mask | props->clr_port_cap_mask)
 372             & ~allowed_port_caps) {
 373                 ehca_err(&shca->ib_device, "Non-changeable bits set in masks  "
 374                          "set=%x  clr=%x  allowed=%x", props->set_port_cap_mask,
 375                          props->clr_port_cap_mask, allowed_port_caps);
 376                 return -EINVAL;
 377         }
 378
 379         if (mutex_lock_interruptible(&shca->modify_mutex))
 380                 return -ERESTARTSYS;
 381
 382         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 383         if (!rblock) {
 384                 ehca_err(&shca->ib_device,  "Can't allocate rblock memory.");
 385                 ret = -ENOMEM;
 386                 goto modify_port1;
 387         }
 388
 389         hret = hipz_h_query_port(shca->ipz_hca_handle, port, rblock);
 390         if (hret != H_SUCCESS) {
 391                 ehca_err(&shca->ib_device, "Can't query port properties");
 392                 ret = -EINVAL;
 393                 goto modify_port2;
 394         }
 395
 396         cap = (rblock->capability_mask | props->set_port_cap_mask)
 397                 & ~props->clr_port_cap_mask;
 398
 399         hret = hipz_h_modify_port(shca->ipz_hca_handle, port,
 400                                   cap, props->init_type, port_modify_mask);
 401         if (hret != H_SUCCESS) {
 402                 ehca_err(&shca->ib_device, "Modify port failed  h_ret=%lli",
 403                          hret);
 404                 ret = -EINVAL;
 405         }
 406
 407 modify_port2:
 408         ehca_free_fw_ctrlblock(rblock);
 409
 410 modify_port1:
 411         mutex_unlock(&shca->modify_mutex);
 412
 413         return ret;
 414 }