drivers/infiniband/hw/ehca/ehca_main.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  module start stop, hca detection
   5  *
   6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   8  *           Joachim Fenkes <fenkes@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 #ifdef CONFIG_PPC_64K_PAGES
  44 #include <linux/slab.h>
  45 #endif
  46 #include "ehca_classes.h"
  47 #include "ehca_iverbs.h"
  48 #include "ehca_mrmw.h"
  49 #include "ehca_tools.h"
  50 #include "hcp_if.h"
  51
  52 MODULE_LICENSE("Dual BSD/GPL");
  53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  54 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  55 MODULE_VERSION("SVNEHCA_0023");
  56
  57 int ehca_open_aqp1     = 0;
  58 int ehca_debug_level   = 0;
  59 int ehca_hw_level      = 0;
  60 int ehca_nr_ports      = 2;
  61 int ehca_use_hp_mr     = 0;
  62 int ehca_port_act_time = 30;
  63 int ehca_poll_all_eqs  = 1;
  64 int ehca_static_rate   = -1;
  65 int ehca_scaling_code  = 0;
  66 int ehca_mr_largepage  = 0;
  67
  68 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
  69 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
  70 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
  71 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
  72 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
  73 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
  74 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
  75 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
  76 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
  77 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
  78
  79 MODULE_PARM_DESC(open_aqp1,
  80                  "AQP1 on startup (0: no (default), 1: yes)");
  81 MODULE_PARM_DESC(debug_level,
  82                  "debug level"
  83                  " (0: no debug traces (default), 1: with debug traces)");
  84 MODULE_PARM_DESC(hw_level,
  85                  "hardware level"
  86                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  87 MODULE_PARM_DESC(nr_ports,
  88                  "number of connected ports (default: 2)");
  89 MODULE_PARM_DESC(use_hp_mr,
  90                  "high performance MRs (0: no (default), 1: yes)");
  91 MODULE_PARM_DESC(port_act_time,
  92                  "time to wait for port activation (default: 30 sec)");
  93 MODULE_PARM_DESC(poll_all_eqs,
  94                  "polls all event queues periodically"
  95                  " (0: no, 1: yes (default))");
  96 MODULE_PARM_DESC(static_rate,
  97                  "set permanent static rate (default: disabled)");
  98 MODULE_PARM_DESC(scaling_code,
  99                  "set scaling code (0: disabled/default, 1: enabled)");
 100 MODULE_PARM_DESC(mr_largepage,
 101                  "use large page for MR (0: use PAGE_SIZE (default), "
 102                  "1: use large page depending on MR size");
 103
 104 DEFINE_RWLOCK(ehca_qp_idr_lock);
 105 DEFINE_RWLOCK(ehca_cq_idr_lock);
 106 DEFINE_IDR(ehca_qp_idr);
 107 DEFINE_IDR(ehca_cq_idr);
 108
 109 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 110 static DEFINE_SPINLOCK(shca_list_lock);
 111
 112 static struct timer_list poll_eqs_timer;
 113
 114 #ifdef CONFIG_PPC_64K_PAGES
 115 static struct kmem_cache *ctblk_cache;
 116
 117 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 118 {
 119         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 120         if (!ret)
 121                 ehca_gen_err("Out of memory for ctblk");
 122         return ret;
 123 }
 124
 125 void ehca_free_fw_ctrlblock(void *ptr)
 126 {
 127         if (ptr)
 128                 kmem_cache_free(ctblk_cache, ptr);
 129
 130 }
 131 #endif
 132
 133 int ehca2ib_return_code(u64 ehca_rc)
 134 {
 135         switch (ehca_rc) {
 136         case H_SUCCESS:
 137                 return 0;
 138         case H_RESOURCE:             /* Resource in use */
 139         case H_BUSY:
 140                 return -EBUSY;
 141         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 142         case H_CONSTRAINED:          /* resource constraint */
 143         case H_NO_MEM:
 144                 return -ENOMEM;
 145         default:
 146                 return -EINVAL;
 147         }
 148 }
 149
 150 static int ehca_create_slab_caches(void)
 151 {
 152         int ret;
 153
 154         ret = ehca_init_pd_cache();
 155         if (ret) {
 156                 ehca_gen_err("Cannot create PD SLAB cache.");
 157                 return ret;
 158         }
 159
 160         ret = ehca_init_cq_cache();
 161         if (ret) {
 162                 ehca_gen_err("Cannot create CQ SLAB cache.");
 163                 goto create_slab_caches2;
 164         }
 165
 166         ret = ehca_init_qp_cache();
 167         if (ret) {
 168                 ehca_gen_err("Cannot create QP SLAB cache.");
 169                 goto create_slab_caches3;
 170         }
 171
 172         ret = ehca_init_av_cache();
 173         if (ret) {
 174                 ehca_gen_err("Cannot create AV SLAB cache.");
 175                 goto create_slab_caches4;
 176         }
 177
 178         ret = ehca_init_mrmw_cache();
 179         if (ret) {
 180                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 181                 goto create_slab_caches5;
 182         }
 183
 184         ret = ehca_init_small_qp_cache();
 185         if (ret) {
 186                 ehca_gen_err("Cannot create small queue SLAB cache.");
 187                 goto create_slab_caches6;
 188         }
 189
 190 #ifdef CONFIG_PPC_64K_PAGES
 191         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 192                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 193                                         SLAB_HWCACHE_ALIGN,
 194                                         NULL);
 195         if (!ctblk_cache) {
 196                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 197                 ehca_cleanup_small_qp_cache();
 198                 goto create_slab_caches6;
 199         }
 200 #endif
 201         return 0;
 202
 203 create_slab_caches6:
 204         ehca_cleanup_mrmw_cache();
 205
 206 create_slab_caches5:
 207         ehca_cleanup_av_cache();
 208
 209 create_slab_caches4:
 210         ehca_cleanup_qp_cache();
 211
 212 create_slab_caches3:
 213         ehca_cleanup_cq_cache();
 214
 215 create_slab_caches2:
 216         ehca_cleanup_pd_cache();
 217
 218         return ret;
 219 }
 220
 221 static void ehca_destroy_slab_caches(void)
 222 {
 223         ehca_cleanup_small_qp_cache();
 224         ehca_cleanup_mrmw_cache();
 225         ehca_cleanup_av_cache();
 226         ehca_cleanup_qp_cache();
 227         ehca_cleanup_cq_cache();
 228         ehca_cleanup_pd_cache();
 229 #ifdef CONFIG_PPC_64K_PAGES
 230         if (ctblk_cache)
 231                 kmem_cache_destroy(ctblk_cache);
 232 #endif
 233 }
 234
 235 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 236 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 237
 238 static struct cap_descr {
 239         u64 mask;
 240         char *descr;
 241 } hca_cap_descr[] = {
 242         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 243         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 244         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 245         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 246         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 247         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 248         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 249         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 250         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 251         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 252         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 253         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 254         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 255         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 256         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 257         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 258         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 259 };
 260
 261 int ehca_sense_attributes(struct ehca_shca *shca)
 262 {
 263         int i, ret = 0;
 264         u64 h_ret;
 265         struct hipz_query_hca *rblock;
 266         struct hipz_query_port *port;
 267
 268         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 269         if (!rblock) {
 270                 ehca_gen_err("Cannot allocate rblock memory.");
 271                 return -ENOMEM;
 272         }
 273
 274         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 275         if (h_ret != H_SUCCESS) {
 276                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
 277                              h_ret);
 278                 ret = -EPERM;
 279                 goto sense_attributes1;
 280         }
 281
 282         if (ehca_nr_ports == 1)
 283                 shca->num_ports = 1;
 284         else
 285                 shca->num_ports = (u8)rblock->num_ports;
 286
 287         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 288
 289         if (ehca_hw_level == 0) {
 290                 u32 hcaaver;
 291                 u32 revid;
 292
 293                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 294                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 295
 296                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 297
 298                 if (hcaaver == 1) {
 299                         if (revid <= 3)
 300                                 shca->hw_level = 0x10 | (revid + 1);
 301                         else
 302                                 shca->hw_level = 0x14;
 303                 } else if (hcaaver == 2) {
 304                         if (revid == 0)
 305                                 shca->hw_level = 0x21;
 306                         else if (revid == 0x10)
 307                                 shca->hw_level = 0x22;
 308                         else if (revid == 0x20 || revid == 0x21)
 309                                 shca->hw_level = 0x23;
 310                 }
 311
 312                 if (!shca->hw_level) {
 313                         ehca_gen_warn("unknown hardware version"
 314                                       " - assuming default level");
 315                         shca->hw_level = 0x22;
 316                 }
 317         } else
 318                 shca->hw_level = ehca_hw_level;
 319         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 320
 321         shca->sport[0].rate = IB_RATE_30_GBPS;
 322         shca->sport[1].rate = IB_RATE_30_GBPS;
 323
 324         shca->hca_cap = rblock->hca_cap_indicators;
 325         ehca_gen_dbg(" ... HCA capabilities:");
 326         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 327                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 328                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 329
 330         shca->hca_cap_mr_pgsize = rblock->memory_page_size_supported;
 331
 332         port = (struct hipz_query_port *)rblock;
 333         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 334         if (h_ret != H_SUCCESS) {
 335                 ehca_gen_err("Cannot query port properties. h_ret=%lx",
 336                              h_ret);
 337                 ret = -EPERM;
 338                 goto sense_attributes1;
 339         }
 340
 341         shca->max_mtu = port->max_mtu;
 342
 343 sense_attributes1:
 344         ehca_free_fw_ctrlblock(rblock);
 345         return ret;
 346 }
 347
 348 static int init_node_guid(struct ehca_shca *shca)
 349 {
 350         int ret = 0;
 351         struct hipz_query_hca *rblock;
 352
 353         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 354         if (!rblock) {
 355                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 356                 return -ENOMEM;
 357         }
 358
 359         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 360                 ehca_err(&shca->ib_device, "Can't query device properties");
 361                 ret = -EINVAL;
 362                 goto init_node_guid1;
 363         }
 364
 365         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 366
 367 init_node_guid1:
 368         ehca_free_fw_ctrlblock(rblock);
 369         return ret;
 370 }
 371
 372 int ehca_init_device(struct ehca_shca *shca)
 373 {
 374         int ret;
 375
 376         ret = init_node_guid(shca);
 377         if (ret)
 378                 return ret;
 379
 380         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 381         shca->ib_device.owner               = THIS_MODULE;
 382
 383         shca->ib_device.uverbs_abi_ver      = 8;
 384         shca->ib_device.uverbs_cmd_mask     =
 385                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 386                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 387                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 388                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 389                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 390                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 391                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 392                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 393                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 394                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 395                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 396                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 397                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 398                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 399                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 400                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 401
 402         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 403         shca->ib_device.phys_port_cnt       = shca->num_ports;
 404         shca->ib_device.num_comp_vectors    = 1;
 405         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 406         shca->ib_device.query_device        = ehca_query_device;
 407         shca->ib_device.query_port          = ehca_query_port;
 408         shca->ib_device.query_gid           = ehca_query_gid;
 409         shca->ib_device.query_pkey          = ehca_query_pkey;
 410         /* shca->in_device.modify_device    = ehca_modify_device    */
 411         shca->ib_device.modify_port         = ehca_modify_port;
 412         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 413         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 414         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 415         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 416         shca->ib_device.create_ah           = ehca_create_ah;
 417         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 418         shca->ib_device.query_ah            = ehca_query_ah;
 419         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 420         shca->ib_device.create_qp           = ehca_create_qp;
 421         shca->ib_device.modify_qp           = ehca_modify_qp;
 422         shca->ib_device.query_qp            = ehca_query_qp;
 423         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 424         shca->ib_device.post_send           = ehca_post_send;
 425         shca->ib_device.post_recv           = ehca_post_recv;
 426         shca->ib_device.create_cq           = ehca_create_cq;
 427         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 428         shca->ib_device.resize_cq           = ehca_resize_cq;
 429         shca->ib_device.poll_cq             = ehca_poll_cq;
 430         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 431         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 432         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 433         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 434         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 435         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 436         shca->ib_device.query_mr            = ehca_query_mr;
 437         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 438         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 439         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 440         shca->ib_device.bind_mw             = ehca_bind_mw;
 441         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 442         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 443         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 444         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 445         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 446         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 447         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 448         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 449         shca->ib_device.mmap                = ehca_mmap;
 450
 451         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 452                 shca->ib_device.uverbs_cmd_mask |=
 453                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 454                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 455                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 456                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 457
 458                 shca->ib_device.create_srq          = ehca_create_srq;
 459                 shca->ib_device.modify_srq          = ehca_modify_srq;
 460                 shca->ib_device.query_srq           = ehca_query_srq;
 461                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 462                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 463         }
 464
 465         return ret;
 466 }
 467
 468 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 469 {
 470         struct ehca_sport *sport = &shca->sport[port - 1];
 471         struct ib_cq *ibcq;
 472         struct ib_qp *ibqp;
 473         struct ib_qp_init_attr qp_init_attr;
 474         int ret;
 475
 476         if (sport->ibcq_aqp1) {
 477                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 478                 return -EPERM;
 479         }
 480
 481         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 482         if (IS_ERR(ibcq)) {
 483                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 484                 return PTR_ERR(ibcq);
 485         }
 486         sport->ibcq_aqp1 = ibcq;
 487
 488         if (sport->ibqp_aqp1) {
 489                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 490                 ret = -EPERM;
 491                 goto create_aqp1;
 492         }
 493
 494         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 495         qp_init_attr.send_cq          = ibcq;
 496         qp_init_attr.recv_cq          = ibcq;
 497         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 498         qp_init_attr.cap.max_send_wr  = 100;
 499         qp_init_attr.cap.max_recv_wr  = 100;
 500         qp_init_attr.cap.max_send_sge = 2;
 501         qp_init_attr.cap.max_recv_sge = 1;
 502         qp_init_attr.qp_type          = IB_QPT_GSI;
 503         qp_init_attr.port_num         = port;
 504         qp_init_attr.qp_context       = NULL;
 505         qp_init_attr.event_handler    = NULL;
 506         qp_init_attr.srq              = NULL;
 507
 508         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 509         if (IS_ERR(ibqp)) {
 510                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 511                 ret = PTR_ERR(ibqp);
 512                 goto create_aqp1;
 513         }
 514         sport->ibqp_aqp1 = ibqp;
 515
 516         return 0;
 517
 518 create_aqp1:
 519         ib_destroy_cq(sport->ibcq_aqp1);
 520         return ret;
 521 }
 522
 523 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 524 {
 525         int ret;
 526
 527         ret = ib_destroy_qp(sport->ibqp_aqp1);
 528         if (ret) {
 529                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
 530                 return ret;
 531         }
 532
 533         ret = ib_destroy_cq(sport->ibcq_aqp1);
 534         if (ret)
 535                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
 536
 537         return ret;
 538 }
 539
 540 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 541 {
 542         return snprintf(buf, PAGE_SIZE, "%d\n",
 543                         ehca_debug_level);
 544 }
 545
 546 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 547                                       const char *buf, size_t count)
 548 {
 549         int value = (*buf) - '0';
 550         if (value >= 0 && value <= 9)
 551                 ehca_debug_level = value;
 552         return 1;
 553 }
 554
 555 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 556             ehca_show_debug_level, ehca_store_debug_level);
 557
 558 static struct attribute *ehca_drv_attrs[] = {
 559         &driver_attr_debug_level.attr,
 560         NULL
 561 };
 562
 563 static struct attribute_group ehca_drv_attr_grp = {
 564         .attrs = ehca_drv_attrs
 565 };
 566
 567 #define EHCA_RESOURCE_ATTR(name)                                           \
 568 static ssize_t  ehca_show_##name(struct device *dev,                       \
 569                                  struct device_attribute *attr,            \
 570                                  char *buf)                                \
 571 {                                                                          \
 572         struct ehca_shca *shca;                                            \
 573         struct hipz_query_hca *rblock;                                     \
 574         int data;                                                          \
 575                                                                            \
 576         shca = dev->driver_data;                                           \
 577                                                                            \
 578         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 579         if (!rblock) {                                                     \
 580                 dev_err(dev, "Can't allocate rblock memory.");             \
 581                 return 0;                                                  \
 582         }                                                                  \
 583                                                                            \
 584         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 585                 dev_err(dev, "Can't query device properties");             \
 586                 ehca_free_fw_ctrlblock(rblock);                            \
 587                 return 0;                                                  \
 588         }                                                                  \
 589                                                                            \
 590         data = rblock->name;                                               \
 591         ehca_free_fw_ctrlblock(rblock);                                    \
 592                                                                            \
 593         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 594                 return snprintf(buf, 256, "1\n");                          \
 595         else                                                               \
 596                 return snprintf(buf, 256, "%d\n", data);                   \
 597                                                                            \
 598 }                                                                          \
 599 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 600
 601 EHCA_RESOURCE_ATTR(num_ports);
 602 EHCA_RESOURCE_ATTR(hw_ver);
 603 EHCA_RESOURCE_ATTR(max_eq);
 604 EHCA_RESOURCE_ATTR(cur_eq);
 605 EHCA_RESOURCE_ATTR(max_cq);
 606 EHCA_RESOURCE_ATTR(cur_cq);
 607 EHCA_RESOURCE_ATTR(max_qp);
 608 EHCA_RESOURCE_ATTR(cur_qp);
 609 EHCA_RESOURCE_ATTR(max_mr);
 610 EHCA_RESOURCE_ATTR(cur_mr);
 611 EHCA_RESOURCE_ATTR(max_mw);
 612 EHCA_RESOURCE_ATTR(cur_mw);
 613 EHCA_RESOURCE_ATTR(max_pd);
 614 EHCA_RESOURCE_ATTR(max_ah);
 615
 616 static ssize_t ehca_show_adapter_handle(struct device *dev,
 617                                         struct device_attribute *attr,
 618                                         char *buf)
 619 {
 620         struct ehca_shca *shca = dev->driver_data;
 621
 622         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 623
 624 }
 625 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 626
 627 static ssize_t ehca_show_mr_largepage(struct device *dev,
 628                                       struct device_attribute *attr,
 629                                       char *buf)
 630 {
 631         return sprintf(buf, "%d\n", ehca_mr_largepage);
 632 }
 633 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
 634
 635 static struct attribute *ehca_dev_attrs[] = {
 636         &dev_attr_adapter_handle.attr,
 637         &dev_attr_num_ports.attr,
 638         &dev_attr_hw_ver.attr,
 639         &dev_attr_max_eq.attr,
 640         &dev_attr_cur_eq.attr,
 641         &dev_attr_max_cq.attr,
 642         &dev_attr_cur_cq.attr,
 643         &dev_attr_max_qp.attr,
 644         &dev_attr_cur_qp.attr,
 645         &dev_attr_max_mr.attr,
 646         &dev_attr_cur_mr.attr,
 647         &dev_attr_max_mw.attr,
 648         &dev_attr_cur_mw.attr,
 649         &dev_attr_max_pd.attr,
 650         &dev_attr_max_ah.attr,
 651         &dev_attr_mr_largepage.attr,
 652         NULL
 653 };
 654
 655 static struct attribute_group ehca_dev_attr_grp = {
 656         .attrs = ehca_dev_attrs
 657 };
 658
 659 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 660                                 const struct of_device_id *id)
 661 {
 662         struct ehca_shca *shca;
 663         const u64 *handle;
 664         struct ib_pd *ibpd;
 665         int ret;
 666
 667         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 668         if (!handle) {
 669                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 670                              dev->ofdev.node->full_name);
 671                 return -ENODEV;
 672         }
 673
 674         if (!(*handle)) {
 675                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 676                              dev->ofdev.node->full_name);
 677                 return -ENODEV;
 678         }
 679
 680         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 681         if (!shca) {
 682                 ehca_gen_err("Cannot allocate shca memory.");
 683                 return -ENOMEM;
 684         }
 685         mutex_init(&shca->modify_mutex);
 686
 687         shca->ibmebus_dev = dev;
 688         shca->ipz_hca_handle.handle = *handle;
 689         dev->ofdev.dev.driver_data = shca;
 690
 691         ret = ehca_sense_attributes(shca);
 692         if (ret < 0) {
 693                 ehca_gen_err("Cannot sense eHCA attributes.");
 694                 goto probe1;
 695         }
 696
 697         ret = ehca_init_device(shca);
 698         if (ret) {
 699                 ehca_gen_err("Cannot init ehca  device struct");
 700                 goto probe1;
 701         }
 702
 703         /* create event queues */
 704         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 705         if (ret) {
 706                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 707                 goto probe1;
 708         }
 709
 710         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 711         if (ret) {
 712                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 713                 goto probe3;
 714         }
 715
 716         /* create internal protection domain */
 717         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 718         if (IS_ERR(ibpd)) {
 719                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 720                 ret = PTR_ERR(ibpd);
 721                 goto probe4;
 722         }
 723
 724         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 725         shca->pd->ib_pd.device = &shca->ib_device;
 726
 727         /* create internal max MR */
 728         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 729
 730         if (ret) {
 731                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
 732                          ret);
 733                 goto probe5;
 734         }
 735
 736         ret = ib_register_device(&shca->ib_device);
 737         if (ret) {
 738                 ehca_err(&shca->ib_device,
 739                          "ib_register_device() failed ret=%x", ret);
 740                 goto probe6;
 741         }
 742
 743         /* create AQP1 for port 1 */
 744         if (ehca_open_aqp1 == 1) {
 745                 shca->sport[0].port_state = IB_PORT_DOWN;
 746                 ret = ehca_create_aqp1(shca, 1);
 747                 if (ret) {
 748                         ehca_err(&shca->ib_device,
 749                                  "Cannot create AQP1 for port 1.");
 750                         goto probe7;
 751                 }
 752         }
 753
 754         /* create AQP1 for port 2 */
 755         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 756                 shca->sport[1].port_state = IB_PORT_DOWN;
 757                 ret = ehca_create_aqp1(shca, 2);
 758                 if (ret) {
 759                         ehca_err(&shca->ib_device,
 760                                  "Cannot create AQP1 for port 2.");
 761                         goto probe8;
 762                 }
 763         }
 764
 765         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 766         if (ret) /* only complain; we can live without attributes */
 767                 ehca_err(&shca->ib_device,
 768                          "Cannot create device attributes  ret=%d", ret);
 769
 770         spin_lock(&shca_list_lock);
 771         list_add(&shca->shca_list, &shca_list);
 772         spin_unlock(&shca_list_lock);
 773
 774         return 0;
 775
 776 probe8:
 777         ret = ehca_destroy_aqp1(&shca->sport[0]);
 778         if (ret)
 779                 ehca_err(&shca->ib_device,
 780                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
 781
 782 probe7:
 783         ib_unregister_device(&shca->ib_device);
 784
 785 probe6:
 786         ret = ehca_dereg_internal_maxmr(shca);
 787         if (ret)
 788                 ehca_err(&shca->ib_device,
 789                          "Cannot destroy internal MR. ret=%x", ret);
 790
 791 probe5:
 792         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 793         if (ret)
 794                 ehca_err(&shca->ib_device,
 795                          "Cannot destroy internal PD. ret=%x", ret);
 796
 797 probe4:
 798         ret = ehca_destroy_eq(shca, &shca->neq);
 799         if (ret)
 800                 ehca_err(&shca->ib_device,
 801                          "Cannot destroy NEQ. ret=%x", ret);
 802
 803 probe3:
 804         ret = ehca_destroy_eq(shca, &shca->eq);
 805         if (ret)
 806                 ehca_err(&shca->ib_device,
 807                          "Cannot destroy EQ. ret=%x", ret);
 808
 809 probe1:
 810         ib_dealloc_device(&shca->ib_device);
 811
 812         return -EINVAL;
 813 }
 814
 815 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 816 {
 817         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 818         int ret;
 819
 820         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 821
 822         if (ehca_open_aqp1 == 1) {
 823                 int i;
 824                 for (i = 0; i < shca->num_ports; i++) {
 825                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 826                         if (ret)
 827                                 ehca_err(&shca->ib_device,
 828                                          "Cannot destroy AQP1 for port %x "
 829                                          "ret=%x", ret, i);
 830                 }
 831         }
 832
 833         ib_unregister_device(&shca->ib_device);
 834
 835         ret = ehca_dereg_internal_maxmr(shca);
 836         if (ret)
 837                 ehca_err(&shca->ib_device,
 838                          "Cannot destroy internal MR. ret=%x", ret);
 839
 840         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 841         if (ret)
 842                 ehca_err(&shca->ib_device,
 843                          "Cannot destroy internal PD. ret=%x", ret);
 844
 845         ret = ehca_destroy_eq(shca, &shca->eq);
 846         if (ret)
 847                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
 848
 849         ret = ehca_destroy_eq(shca, &shca->neq);
 850         if (ret)
 851                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
 852
 853         ib_dealloc_device(&shca->ib_device);
 854
 855         spin_lock(&shca_list_lock);
 856         list_del(&shca->shca_list);
 857         spin_unlock(&shca_list_lock);
 858
 859         return ret;
 860 }
 861
 862 static struct of_device_id ehca_device_table[] =
 863 {
 864         {
 865                 .name       = "lhca",
 866                 .compatible = "IBM,lhca",
 867         },
 868         {},
 869 };
 870
 871 static struct ibmebus_driver ehca_driver = {
 872         .name     = "ehca",
 873         .id_table = ehca_device_table,
 874         .probe    = ehca_probe,
 875         .remove   = ehca_remove,
 876 };
 877
 878 void ehca_poll_eqs(unsigned long data)
 879 {
 880         struct ehca_shca *shca;
 881
 882         spin_lock(&shca_list_lock);
 883         list_for_each_entry(shca, &shca_list, shca_list) {
 884                 if (shca->eq.is_initialized) {
 885                         /* call deadman proc only if eq ptr does not change */
 886                         struct ehca_eq *eq = &shca->eq;
 887                         int max = 3;
 888                         volatile u64 q_ofs, q_ofs2;
 889                         u64 flags;
 890                         spin_lock_irqsave(&eq->spinlock, flags);
 891                         q_ofs = eq->ipz_queue.current_q_offset;
 892                         spin_unlock_irqrestore(&eq->spinlock, flags);
 893                         do {
 894                                 spin_lock_irqsave(&eq->spinlock, flags);
 895                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 896                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 897                                 max--;
 898                         } while (q_ofs == q_ofs2 && max > 0);
 899                         if (q_ofs == q_ofs2)
 900                                 ehca_process_eq(shca, 0);
 901                 }
 902         }
 903         mod_timer(&poll_eqs_timer, jiffies + HZ);
 904         spin_unlock(&shca_list_lock);
 905 }
 906
 907 int __init ehca_module_init(void)
 908 {
 909         int ret;
 910
 911         printk(KERN_INFO "eHCA Infiniband Device Driver "
 912                "(Rel.: SVNEHCA_0023)\n");
 913
 914         ret = ehca_create_comp_pool();
 915         if (ret) {
 916                 ehca_gen_err("Cannot create comp pool.");
 917                 return ret;
 918         }
 919
 920         ret = ehca_create_slab_caches();
 921         if (ret) {
 922                 ehca_gen_err("Cannot create SLAB caches");
 923                 ret = -ENOMEM;
 924                 goto module_init1;
 925         }
 926
 927         ret = ibmebus_register_driver(&ehca_driver);
 928         if (ret) {
 929                 ehca_gen_err("Cannot register eHCA device driver");
 930                 ret = -EINVAL;
 931                 goto module_init2;
 932         }
 933
 934         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 935         if (ret) /* only complain; we can live without attributes */
 936                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 937
 938         if (ehca_poll_all_eqs != 1) {
 939                 ehca_gen_err("WARNING!!!");
 940                 ehca_gen_err("It is possible to lose interrupts.");
 941         } else {
 942                 init_timer(&poll_eqs_timer);
 943                 poll_eqs_timer.function = ehca_poll_eqs;
 944                 poll_eqs_timer.expires = jiffies + HZ;
 945                 add_timer(&poll_eqs_timer);
 946         }
 947
 948         return 0;
 949
 950 module_init2:
 951         ehca_destroy_slab_caches();
 952
 953 module_init1:
 954         ehca_destroy_comp_pool();
 955         return ret;
 956 };
 957
 958 void __exit ehca_module_exit(void)
 959 {
 960         if (ehca_poll_all_eqs == 1)
 961                 del_timer_sync(&poll_eqs_timer);
 962
 963         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 964         ibmebus_unregister_driver(&ehca_driver);
 965
 966         ehca_destroy_slab_caches();
 967
 968         ehca_destroy_comp_pool();
 969
 970         idr_destroy(&ehca_cq_idr);
 971         idr_destroy(&ehca_qp_idr);
 972 };
 973
 974 module_init(ehca_module_init);
 975 module_exit(ehca_module_exit);