drivers/staging/rdma/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
  47 #include <linux/notifier.h>
  48 #include <linux/memory.h>
  49 #include <rdma/ib_mad.h>
  50 #include "ehca_classes.h"
  51 #include "ehca_iverbs.h"
  52 #include "ehca_mrmw.h"
  53 #include "ehca_tools.h"
  54 #include "hcp_if.h"
  55
  56 #define HCAD_VERSION "0029"
  57
  58 MODULE_LICENSE("Dual BSD/GPL");
  59 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  60 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  61 MODULE_VERSION(HCAD_VERSION);
  62
  63 static bool ehca_open_aqp1    = 0;
  64 static int ehca_hw_level      = 0;
  65 static bool ehca_poll_all_eqs = 1;
  66
  67 int ehca_debug_level   = 0;
  68 int ehca_nr_ports      = -1;
  69 bool ehca_use_hp_mr    = 0;
  70 int ehca_port_act_time = 30;
  71 int ehca_static_rate   = -1;
  72 bool ehca_scaling_code = 0;
  73 int ehca_lock_hcalls   = -1;
  74 int ehca_max_cq        = -1;
  75 int ehca_max_qp        = -1;
  76
  77 module_param_named(open_aqp1,     ehca_open_aqp1,     bool, S_IRUGO);
  78 module_param_named(debug_level,   ehca_debug_level,   int,  S_IRUGO);
  79 module_param_named(hw_level,      ehca_hw_level,      int,  S_IRUGO);
  80 module_param_named(nr_ports,      ehca_nr_ports,      int,  S_IRUGO);
  81 module_param_named(use_hp_mr,     ehca_use_hp_mr,     bool, S_IRUGO);
  82 module_param_named(port_act_time, ehca_port_act_time, int,  S_IRUGO);
  83 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  bool, S_IRUGO);
  84 module_param_named(static_rate,   ehca_static_rate,   int,  S_IRUGO);
  85 module_param_named(scaling_code,  ehca_scaling_code,  bool, S_IRUGO);
  86 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bint, S_IRUGO);
  87 module_param_named(number_of_cqs, ehca_max_cq,        int,  S_IRUGO);
  88 module_param_named(number_of_qps, ehca_max_qp,        int,  S_IRUGO);
  89
  90 MODULE_PARM_DESC(open_aqp1,
  91                  "Open AQP1 on startup (default: no)");
  92 MODULE_PARM_DESC(debug_level,
  93                  "Amount of debug output (0: none (default), 1: traces, "
  94                  "2: some dumps, 3: lots)");
  95 MODULE_PARM_DESC(hw_level,
  96                  "Hardware level (0: autosensing (default), "
  97                  "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
  98 MODULE_PARM_DESC(nr_ports,
  99                  "number of connected ports (-1: autodetect (default), "
 100                  "1: port one only, 2: two ports)");
 101 MODULE_PARM_DESC(use_hp_mr,
 102                  "Use high performance MRs (default: no)");
 103 MODULE_PARM_DESC(port_act_time,
 104                  "Time to wait for port activation (default: 30 sec)");
 105 MODULE_PARM_DESC(poll_all_eqs,
 106                  "Poll all event queues periodically (default: yes)");
 107 MODULE_PARM_DESC(static_rate,
 108                  "Set permanent static rate (default: no static rate)");
 109 MODULE_PARM_DESC(scaling_code,
 110                  "Enable scaling code (default: no)");
 111 MODULE_PARM_DESC(lock_hcalls,
 112                  "Serialize all hCalls made by the driver "
 113                  "(default: autodetect)");
 114 MODULE_PARM_DESC(number_of_cqs,
 115                 "Max number of CQs which can be allocated "
 116                 "(default: autodetect)");
 117 MODULE_PARM_DESC(number_of_qps,
 118                 "Max number of QPs which can be allocated "
 119                 "(default: autodetect)");
 120
 121 DEFINE_RWLOCK(ehca_qp_idr_lock);
 122 DEFINE_RWLOCK(ehca_cq_idr_lock);
 123 DEFINE_IDR(ehca_qp_idr);
 124 DEFINE_IDR(ehca_cq_idr);
 125
 126 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 127 DEFINE_SPINLOCK(shca_list_lock);
 128
 129 static struct timer_list poll_eqs_timer;
 130
 131 #ifdef CONFIG_PPC_64K_PAGES
 132 static struct kmem_cache *ctblk_cache;
 133
 134 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 135 {
 136         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 137         if (!ret)
 138                 ehca_gen_err("Out of memory for ctblk");
 139         return ret;
 140 }
 141
 142 void ehca_free_fw_ctrlblock(void *ptr)
 143 {
 144         if (ptr)
 145                 kmem_cache_free(ctblk_cache, ptr);
 146
 147 }
 148 #endif
 149
 150 int ehca2ib_return_code(u64 ehca_rc)
 151 {
 152         switch (ehca_rc) {
 153         case H_SUCCESS:
 154                 return 0;
 155         case H_RESOURCE:             /* Resource in use */
 156         case H_BUSY:
 157                 return -EBUSY;
 158         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 159         case H_CONSTRAINED:          /* resource constraint */
 160         case H_NO_MEM:
 161                 return -ENOMEM;
 162         default:
 163                 return -EINVAL;
 164         }
 165 }
 166
 167 static int ehca_create_slab_caches(void)
 168 {
 169         int ret;
 170
 171         ret = ehca_init_pd_cache();
 172         if (ret) {
 173                 ehca_gen_err("Cannot create PD SLAB cache.");
 174                 return ret;
 175         }
 176
 177         ret = ehca_init_cq_cache();
 178         if (ret) {
 179                 ehca_gen_err("Cannot create CQ SLAB cache.");
 180                 goto create_slab_caches2;
 181         }
 182
 183         ret = ehca_init_qp_cache();
 184         if (ret) {
 185                 ehca_gen_err("Cannot create QP SLAB cache.");
 186                 goto create_slab_caches3;
 187         }
 188
 189         ret = ehca_init_av_cache();
 190         if (ret) {
 191                 ehca_gen_err("Cannot create AV SLAB cache.");
 192                 goto create_slab_caches4;
 193         }
 194
 195         ret = ehca_init_mrmw_cache();
 196         if (ret) {
 197                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 198                 goto create_slab_caches5;
 199         }
 200
 201         ret = ehca_init_small_qp_cache();
 202         if (ret) {
 203                 ehca_gen_err("Cannot create small queue SLAB cache.");
 204                 goto create_slab_caches6;
 205         }
 206
 207 #ifdef CONFIG_PPC_64K_PAGES
 208         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 209                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 210                                         SLAB_HWCACHE_ALIGN,
 211                                         NULL);
 212         if (!ctblk_cache) {
 213                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 214                 ehca_cleanup_small_qp_cache();
 215                 ret = -ENOMEM;
 216                 goto create_slab_caches6;
 217         }
 218 #endif
 219         return 0;
 220
 221 create_slab_caches6:
 222         ehca_cleanup_mrmw_cache();
 223
 224 create_slab_caches5:
 225         ehca_cleanup_av_cache();
 226
 227 create_slab_caches4:
 228         ehca_cleanup_qp_cache();
 229
 230 create_slab_caches3:
 231         ehca_cleanup_cq_cache();
 232
 233 create_slab_caches2:
 234         ehca_cleanup_pd_cache();
 235
 236         return ret;
 237 }
 238
 239 static void ehca_destroy_slab_caches(void)
 240 {
 241         ehca_cleanup_small_qp_cache();
 242         ehca_cleanup_mrmw_cache();
 243         ehca_cleanup_av_cache();
 244         ehca_cleanup_qp_cache();
 245         ehca_cleanup_cq_cache();
 246         ehca_cleanup_pd_cache();
 247 #ifdef CONFIG_PPC_64K_PAGES
 248         kmem_cache_destroy(ctblk_cache);
 249 #endif
 250 }
 251
 252 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 253 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 254
 255 static struct cap_descr {
 256         u64 mask;
 257         char *descr;
 258 } hca_cap_descr[] = {
 259         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 260         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 261         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 262         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 263         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 264         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 265         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 266         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 267         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 268         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 269         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 270         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 271         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 272         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 273         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 274         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 275         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 276         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 277 };
 278
 279 static int ehca_sense_attributes(struct ehca_shca *shca)
 280 {
 281         int i, ret = 0;
 282         u64 h_ret;
 283         struct hipz_query_hca *rblock;
 284         struct hipz_query_port *port;
 285         const char *loc_code;
 286
 287         static const u32 pgsize_map[] = {
 288                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 289                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 290                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 291                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 292         };
 293
 294         ehca_gen_dbg("Probing adapter %s...",
 295                      shca->ofdev->dev.of_node->full_name);
 296         loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
 297                                    NULL);
 298         if (loc_code)
 299                 ehca_gen_dbg(" ... location lode=%s", loc_code);
 300
 301         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 302         if (!rblock) {
 303                 ehca_gen_err("Cannot allocate rblock memory.");
 304                 return -ENOMEM;
 305         }
 306
 307         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 308         if (h_ret != H_SUCCESS) {
 309                 ehca_gen_err("Cannot query device properties. h_ret=%lli",
 310                              h_ret);
 311                 ret = -EPERM;
 312                 goto sense_attributes1;
 313         }
 314
 315         if (ehca_nr_ports == 1)
 316                 shca->num_ports = 1;
 317         else
 318                 shca->num_ports = (u8)rblock->num_ports;
 319
 320         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 321
 322         if (ehca_hw_level == 0) {
 323                 u32 hcaaver;
 324                 u32 revid;
 325
 326                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 327                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 328
 329                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 330
 331                 if (hcaaver == 1) {
 332                         if (revid <= 3)
 333                                 shca->hw_level = 0x10 | (revid + 1);
 334                         else
 335                                 shca->hw_level = 0x14;
 336                 } else if (hcaaver == 2) {
 337                         if (revid == 0)
 338                                 shca->hw_level = 0x21;
 339                         else if (revid == 0x10)
 340                                 shca->hw_level = 0x22;
 341                         else if (revid == 0x20 || revid == 0x21)
 342                                 shca->hw_level = 0x23;
 343                 }
 344
 345                 if (!shca->hw_level) {
 346                         ehca_gen_warn("unknown hardware version"
 347                                       " - assuming default level");
 348                         shca->hw_level = 0x22;
 349                 }
 350         } else
 351                 shca->hw_level = ehca_hw_level;
 352         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 353
 354         shca->hca_cap = rblock->hca_cap_indicators;
 355         ehca_gen_dbg(" ... HCA capabilities:");
 356         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 357                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 358                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 359
 360         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 361          * a firmware property, so it's valid across all adapters
 362          */
 363         if (ehca_lock_hcalls == -1)
 364                 ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
 365                                         shca->hca_cap);
 366
 367         /* translate supported MR page sizes; always support 4K */
 368         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 369         for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 370                 if (rblock->memory_page_size_supported & pgsize_map[i])
 371                         shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 372
 373         /* Set maximum number of CQs and QPs to calculate EQ size */
 374         if (shca->max_num_qps == -1)
 375                 shca->max_num_qps = min_t(int, rblock->max_qp,
 376                                           EHCA_MAX_NUM_QUEUES);
 377         else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
 378                 ehca_gen_warn("The requested number of QPs is out of range "
 379                               "(1 - %i) specified by HW. Value is set to %i",
 380                               rblock->max_qp, rblock->max_qp);
 381                 shca->max_num_qps = rblock->max_qp;
 382         }
 383
 384         if (shca->max_num_cqs == -1)
 385                 shca->max_num_cqs = min_t(int, rblock->max_cq,
 386                                           EHCA_MAX_NUM_QUEUES);
 387         else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
 388                 ehca_gen_warn("The requested number of CQs is out of range "
 389                               "(1 - %i) specified by HW. Value is set to %i",
 390                               rblock->max_cq, rblock->max_cq);
 391         }
 392
 393         /* query max MTU from first port -- it's the same for all ports */
 394         port = (struct hipz_query_port *)rblock;
 395         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 396         if (h_ret != H_SUCCESS) {
 397                 ehca_gen_err("Cannot query port properties. h_ret=%lli",
 398                              h_ret);
 399                 ret = -EPERM;
 400                 goto sense_attributes1;
 401         }
 402
 403         shca->max_mtu = port->max_mtu;
 404
 405 sense_attributes1:
 406         ehca_free_fw_ctrlblock(rblock);
 407         return ret;
 408 }
 409
 410 static int init_node_guid(struct ehca_shca *shca)
 411 {
 412         int ret = 0;
 413         struct hipz_query_hca *rblock;
 414
 415         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 416         if (!rblock) {
 417                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 418                 return -ENOMEM;
 419         }
 420
 421         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 422                 ehca_err(&shca->ib_device, "Can't query device properties");
 423                 ret = -EINVAL;
 424                 goto init_node_guid1;
 425         }
 426
 427         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 428
 429 init_node_guid1:
 430         ehca_free_fw_ctrlblock(rblock);
 431         return ret;
 432 }
 433
 434 static int ehca_port_immutable(struct ib_device *ibdev, u8 port_num,
 435                                struct ib_port_immutable *immutable)
 436 {
 437         struct ib_port_attr attr;
 438         int err;
 439
 440         err = ehca_query_port(ibdev, port_num, &attr);
 441         if (err)
 442                 return err;
 443
 444         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 445         immutable->gid_tbl_len = attr.gid_tbl_len;
 446         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
 447         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 448
 449         return 0;
 450 }
 451
 452 static int ehca_init_device(struct ehca_shca *shca)
 453 {
 454         int ret;
 455
 456         ret = init_node_guid(shca);
 457         if (ret)
 458                 return ret;
 459
 460         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 461         shca->ib_device.owner               = THIS_MODULE;
 462
 463         shca->ib_device.uverbs_abi_ver      = 8;
 464         shca->ib_device.uverbs_cmd_mask     =
 465                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 466                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 467                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 468                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 469                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 470                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 471                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 472                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 473                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 474                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 475                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 476                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 477                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 478                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 479                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 480                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 481
 482         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 483         shca->ib_device.phys_port_cnt       = shca->num_ports;
 484         shca->ib_device.num_comp_vectors    = 1;
 485         shca->ib_device.dma_device          = &shca->ofdev->dev;
 486         shca->ib_device.query_device        = ehca_query_device;
 487         shca->ib_device.query_port          = ehca_query_port;
 488         shca->ib_device.query_gid           = ehca_query_gid;
 489         shca->ib_device.query_pkey          = ehca_query_pkey;
 490         /* shca->in_device.modify_device    = ehca_modify_device    */
 491         shca->ib_device.modify_port         = ehca_modify_port;
 492         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 493         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 494         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 495         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 496         shca->ib_device.create_ah           = ehca_create_ah;
 497         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 498         shca->ib_device.query_ah            = ehca_query_ah;
 499         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 500         shca->ib_device.create_qp           = ehca_create_qp;
 501         shca->ib_device.modify_qp           = ehca_modify_qp;
 502         shca->ib_device.query_qp            = ehca_query_qp;
 503         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 504         shca->ib_device.post_send           = ehca_post_send;
 505         shca->ib_device.post_recv           = ehca_post_recv;
 506         shca->ib_device.create_cq           = ehca_create_cq;
 507         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 508         shca->ib_device.resize_cq           = ehca_resize_cq;
 509         shca->ib_device.poll_cq             = ehca_poll_cq;
 510         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 511         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 512         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 513         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 514         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 515         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 516         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 517         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 518         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 519         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 520         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 521         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 522         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 523         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 524         shca->ib_device.process_mad         = ehca_process_mad;
 525         shca->ib_device.mmap                = ehca_mmap;
 526         shca->ib_device.dma_ops             = &ehca_dma_mapping_ops;
 527         shca->ib_device.get_port_immutable  = ehca_port_immutable;
 528
 529         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 530                 shca->ib_device.uverbs_cmd_mask |=
 531                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 532                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 533                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 534                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 535
 536                 shca->ib_device.create_srq          = ehca_create_srq;
 537                 shca->ib_device.modify_srq          = ehca_modify_srq;
 538                 shca->ib_device.query_srq           = ehca_query_srq;
 539                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 540                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 541         }
 542
 543         return ret;
 544 }
 545
 546 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 547 {
 548         struct ehca_sport *sport = &shca->sport[port - 1];
 549         struct ib_cq *ibcq;
 550         struct ib_qp *ibqp;
 551         struct ib_qp_init_attr qp_init_attr;
 552         struct ib_cq_init_attr cq_attr = {};
 553         int ret;
 554
 555         if (sport->ibcq_aqp1) {
 556                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 557                 return -EPERM;
 558         }
 559
 560         cq_attr.cqe = 10;
 561         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1),
 562                             &cq_attr);
 563         if (IS_ERR(ibcq)) {
 564                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 565                 return PTR_ERR(ibcq);
 566         }
 567         sport->ibcq_aqp1 = ibcq;
 568
 569         if (sport->ibqp_sqp[IB_QPT_GSI]) {
 570                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 571                 ret = -EPERM;
 572                 goto create_aqp1;
 573         }
 574
 575         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 576         qp_init_attr.send_cq          = ibcq;
 577         qp_init_attr.recv_cq          = ibcq;
 578         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 579         qp_init_attr.cap.max_send_wr  = 100;
 580         qp_init_attr.cap.max_recv_wr  = 100;
 581         qp_init_attr.cap.max_send_sge = 2;
 582         qp_init_attr.cap.max_recv_sge = 1;
 583         qp_init_attr.qp_type          = IB_QPT_GSI;
 584         qp_init_attr.port_num         = port;
 585         qp_init_attr.qp_context       = NULL;
 586         qp_init_attr.event_handler    = NULL;
 587         qp_init_attr.srq              = NULL;
 588
 589         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 590         if (IS_ERR(ibqp)) {
 591                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 592                 ret = PTR_ERR(ibqp);
 593                 goto create_aqp1;
 594         }
 595         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
 596
 597         return 0;
 598
 599 create_aqp1:
 600         ib_destroy_cq(sport->ibcq_aqp1);
 601         return ret;
 602 }
 603
 604 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 605 {
 606         int ret;
 607
 608         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
 609         if (ret) {
 610                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 611                 return ret;
 612         }
 613
 614         ret = ib_destroy_cq(sport->ibcq_aqp1);
 615         if (ret)
 616                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 617
 618         return ret;
 619 }
 620
 621 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 622 {
 623         return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
 624 }
 625
 626 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 627                                       const char *buf, size_t count)
 628 {
 629         int value = (*buf) - '0';
 630         if (value >= 0 && value <= 9)
 631                 ehca_debug_level = value;
 632         return 1;
 633 }
 634
 635 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 636                    ehca_show_debug_level, ehca_store_debug_level);
 637
 638 static struct attribute *ehca_drv_attrs[] = {
 639         &driver_attr_debug_level.attr,
 640         NULL
 641 };
 642
 643 static struct attribute_group ehca_drv_attr_grp = {
 644         .attrs = ehca_drv_attrs
 645 };
 646
 647 static const struct attribute_group *ehca_drv_attr_groups[] = {
 648         &ehca_drv_attr_grp,
 649         NULL,
 650 };
 651
 652 #define EHCA_RESOURCE_ATTR(name)                                           \
 653 static ssize_t  ehca_show_##name(struct device *dev,                       \
 654                                  struct device_attribute *attr,            \
 655                                  char *buf)                                \
 656 {                                                                          \
 657         struct ehca_shca *shca;                                            \
 658         struct hipz_query_hca *rblock;                                     \
 659         int data;                                                          \
 660                                                                            \
 661         shca = dev_get_drvdata(dev);                                       \
 662                                                                            \
 663         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 664         if (!rblock) {                                                     \
 665                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 666                 return 0;                                                  \
 667         }                                                                  \
 668                                                                            \
 669         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 670                 dev_err(dev, "Can't query device properties\n");           \
 671                 ehca_free_fw_ctrlblock(rblock);                            \
 672                 return 0;                                                  \
 673         }                                                                  \
 674                                                                            \
 675         data = rblock->name;                                               \
 676         ehca_free_fw_ctrlblock(rblock);                                    \
 677                                                                            \
 678         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 679                 return snprintf(buf, 256, "1\n");                          \
 680         else                                                               \
 681                 return snprintf(buf, 256, "%d\n", data);                   \
 682                                                                            \
 683 }                                                                          \
 684 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 685
 686 EHCA_RESOURCE_ATTR(num_ports);
 687 EHCA_RESOURCE_ATTR(hw_ver);
 688 EHCA_RESOURCE_ATTR(max_eq);
 689 EHCA_RESOURCE_ATTR(cur_eq);
 690 EHCA_RESOURCE_ATTR(max_cq);
 691 EHCA_RESOURCE_ATTR(cur_cq);
 692 EHCA_RESOURCE_ATTR(max_qp);
 693 EHCA_RESOURCE_ATTR(cur_qp);
 694 EHCA_RESOURCE_ATTR(max_mr);
 695 EHCA_RESOURCE_ATTR(cur_mr);
 696 EHCA_RESOURCE_ATTR(max_mw);
 697 EHCA_RESOURCE_ATTR(cur_mw);
 698 EHCA_RESOURCE_ATTR(max_pd);
 699 EHCA_RESOURCE_ATTR(max_ah);
 700
 701 static ssize_t ehca_show_adapter_handle(struct device *dev,
 702                                         struct device_attribute *attr,
 703                                         char *buf)
 704 {
 705         struct ehca_shca *shca = dev_get_drvdata(dev);
 706
 707         return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
 708
 709 }
 710 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 711
 712 static struct attribute *ehca_dev_attrs[] = {
 713         &dev_attr_adapter_handle.attr,
 714         &dev_attr_num_ports.attr,
 715         &dev_attr_hw_ver.attr,
 716         &dev_attr_max_eq.attr,
 717         &dev_attr_cur_eq.attr,
 718         &dev_attr_max_cq.attr,
 719         &dev_attr_cur_cq.attr,
 720         &dev_attr_max_qp.attr,
 721         &dev_attr_cur_qp.attr,
 722         &dev_attr_max_mr.attr,
 723         &dev_attr_cur_mr.attr,
 724         &dev_attr_max_mw.attr,
 725         &dev_attr_cur_mw.attr,
 726         &dev_attr_max_pd.attr,
 727         &dev_attr_max_ah.attr,
 728         NULL
 729 };
 730
 731 static struct attribute_group ehca_dev_attr_grp = {
 732         .attrs = ehca_dev_attrs
 733 };
 734
 735 static int ehca_probe(struct platform_device *dev)
 736 {
 737         struct ehca_shca *shca;
 738         const u64 *handle;
 739         struct ib_pd *ibpd;
 740         int ret, i, eq_size;
 741         unsigned long flags;
 742
 743         handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
 744         if (!handle) {
 745                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 746                              dev->dev.of_node->full_name);
 747                 return -ENODEV;
 748         }
 749
 750         if (!(*handle)) {
 751                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 752                              dev->dev.of_node->full_name);
 753                 return -ENODEV;
 754         }
 755
 756         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 757         if (!shca) {
 758                 ehca_gen_err("Cannot allocate shca memory.");
 759                 return -ENOMEM;
 760         }
 761
 762         mutex_init(&shca->modify_mutex);
 763         atomic_set(&shca->num_cqs, 0);
 764         atomic_set(&shca->num_qps, 0);
 765         shca->max_num_qps = ehca_max_qp;
 766         shca->max_num_cqs = ehca_max_cq;
 767
 768         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 769                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
 770
 771         shca->ofdev = dev;
 772         shca->ipz_hca_handle.handle = *handle;
 773         dev_set_drvdata(&dev->dev, shca);
 774
 775         ret = ehca_sense_attributes(shca);
 776         if (ret < 0) {
 777                 ehca_gen_err("Cannot sense eHCA attributes.");
 778                 goto probe1;
 779         }
 780
 781         ret = ehca_init_device(shca);
 782         if (ret) {
 783                 ehca_gen_err("Cannot init ehca  device struct");
 784                 goto probe1;
 785         }
 786
 787         eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
 788         /* create event queues */
 789         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
 790         if (ret) {
 791                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 792                 goto probe1;
 793         }
 794
 795         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 796         if (ret) {
 797                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 798                 goto probe3;
 799         }
 800
 801         /* create internal protection domain */
 802         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 803         if (IS_ERR(ibpd)) {
 804                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 805                 ret = PTR_ERR(ibpd);
 806                 goto probe4;
 807         }
 808
 809         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 810         shca->pd->ib_pd.device = &shca->ib_device;
 811
 812         /* create internal max MR */
 813         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 814
 815         if (ret) {
 816                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 817                          ret);
 818                 goto probe5;
 819         }
 820
 821         ret = ib_register_device(&shca->ib_device, NULL);
 822         if (ret) {
 823                 ehca_err(&shca->ib_device,
 824                          "ib_register_device() failed ret=%i", ret);
 825                 goto probe6;
 826         }
 827
 828         /* create AQP1 for port 1 */
 829         if (ehca_open_aqp1 == 1) {
 830                 shca->sport[0].port_state = IB_PORT_DOWN;
 831                 ret = ehca_create_aqp1(shca, 1);
 832                 if (ret) {
 833                         ehca_err(&shca->ib_device,
 834                                  "Cannot create AQP1 for port 1.");
 835                         goto probe7;
 836                 }
 837         }
 838
 839         /* create AQP1 for port 2 */
 840         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 841                 shca->sport[1].port_state = IB_PORT_DOWN;
 842                 ret = ehca_create_aqp1(shca, 2);
 843                 if (ret) {
 844                         ehca_err(&shca->ib_device,
 845                                  "Cannot create AQP1 for port 2.");
 846                         goto probe8;
 847                 }
 848         }
 849
 850         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 851         if (ret) /* only complain; we can live without attributes */
 852                 ehca_err(&shca->ib_device,
 853                          "Cannot create device attributes  ret=%d", ret);
 854
 855         spin_lock_irqsave(&shca_list_lock, flags);
 856         list_add(&shca->shca_list, &shca_list);
 857         spin_unlock_irqrestore(&shca_list_lock, flags);
 858
 859         return 0;
 860
 861 probe8:
 862         ret = ehca_destroy_aqp1(&shca->sport[0]);
 863         if (ret)
 864                 ehca_err(&shca->ib_device,
 865                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 866
 867 probe7:
 868         ib_unregister_device(&shca->ib_device);
 869
 870 probe6:
 871         ret = ehca_dereg_internal_maxmr(shca);
 872         if (ret)
 873                 ehca_err(&shca->ib_device,
 874                          "Cannot destroy internal MR. ret=%x", ret);
 875
 876 probe5:
 877         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 878         if (ret)
 879                 ehca_err(&shca->ib_device,
 880                          "Cannot destroy internal PD. ret=%x", ret);
 881
 882 probe4:
 883         ret = ehca_destroy_eq(shca, &shca->neq);
 884         if (ret)
 885                 ehca_err(&shca->ib_device,
 886                          "Cannot destroy NEQ. ret=%x", ret);
 887
 888 probe3:
 889         ret = ehca_destroy_eq(shca, &shca->eq);
 890         if (ret)
 891                 ehca_err(&shca->ib_device,
 892                          "Cannot destroy EQ. ret=%x", ret);
 893
 894 probe1:
 895         ib_dealloc_device(&shca->ib_device);
 896
 897         return -EINVAL;
 898 }
 899
 900 static int ehca_remove(struct platform_device *dev)
 901 {
 902         struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
 903         unsigned long flags;
 904         int ret;
 905
 906         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 907
 908         if (ehca_open_aqp1 == 1) {
 909                 int i;
 910                 for (i = 0; i < shca->num_ports; i++) {
 911                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 912                         if (ret)
 913                                 ehca_err(&shca->ib_device,
 914                                          "Cannot destroy AQP1 for port %x "
 915                                          "ret=%i", ret, i);
 916                 }
 917         }
 918
 919         ib_unregister_device(&shca->ib_device);
 920
 921         ret = ehca_dereg_internal_maxmr(shca);
 922         if (ret)
 923                 ehca_err(&shca->ib_device,
 924                          "Cannot destroy internal MR. ret=%i", ret);
 925
 926         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 927         if (ret)
 928                 ehca_err(&shca->ib_device,
 929                          "Cannot destroy internal PD. ret=%i", ret);
 930
 931         ret = ehca_destroy_eq(shca, &shca->eq);
 932         if (ret)
 933                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 934
 935         ret = ehca_destroy_eq(shca, &shca->neq);
 936         if (ret)
 937                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 938
 939         ib_dealloc_device(&shca->ib_device);
 940
 941         spin_lock_irqsave(&shca_list_lock, flags);
 942         list_del(&shca->shca_list);
 943         spin_unlock_irqrestore(&shca_list_lock, flags);
 944
 945         return ret;
 946 }
 947
 948 static struct of_device_id ehca_device_table[] =
 949 {
 950         {
 951                 .name       = "lhca",
 952                 .compatible = "IBM,lhca",
 953         },
 954         {},
 955 };
 956 MODULE_DEVICE_TABLE(of, ehca_device_table);
 957
 958 static struct platform_driver ehca_driver = {
 959         .probe       = ehca_probe,
 960         .remove      = ehca_remove,
 961         .driver = {
 962                 .name = "ehca",
 963                 .owner = THIS_MODULE,
 964                 .groups = ehca_drv_attr_groups,
 965                 .of_match_table = ehca_device_table,
 966         },
 967 };
 968
 969 void ehca_poll_eqs(unsigned long data)
 970 {
 971         struct ehca_shca *shca;
 972
 973         spin_lock(&shca_list_lock);
 974         list_for_each_entry(shca, &shca_list, shca_list) {
 975                 if (shca->eq.is_initialized) {
 976                         /* call deadman proc only if eq ptr does not change */
 977                         struct ehca_eq *eq = &shca->eq;
 978                         int max = 3;
 979                         volatile u64 q_ofs, q_ofs2;
 980                         unsigned long flags;
 981                         spin_lock_irqsave(&eq->spinlock, flags);
 982                         q_ofs = eq->ipz_queue.current_q_offset;
 983                         spin_unlock_irqrestore(&eq->spinlock, flags);
 984                         do {
 985                                 spin_lock_irqsave(&eq->spinlock, flags);
 986                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 987                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 988                                 max--;
 989                         } while (q_ofs == q_ofs2 && max > 0);
 990                         if (q_ofs == q_ofs2)
 991                                 ehca_process_eq(shca, 0);
 992                 }
 993         }
 994         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
 995         spin_unlock(&shca_list_lock);
 996 }
 997
 998 static int ehca_mem_notifier(struct notifier_block *nb,
 999                              unsigned long action, void *data)
1000 {
1001         static unsigned long ehca_dmem_warn_time;
1002         unsigned long flags;
1003
1004         switch (action) {
1005         case MEM_CANCEL_OFFLINE:
1006         case MEM_CANCEL_ONLINE:
1007         case MEM_ONLINE:
1008         case MEM_OFFLINE:
1009                 return NOTIFY_OK;
1010         case MEM_GOING_ONLINE:
1011         case MEM_GOING_OFFLINE:
1012                 /* only ok if no hca is attached to the lpar */
1013                 spin_lock_irqsave(&shca_list_lock, flags);
1014                 if (list_empty(&shca_list)) {
1015                         spin_unlock_irqrestore(&shca_list_lock, flags);
1016                         return NOTIFY_OK;
1017                 } else {
1018                         spin_unlock_irqrestore(&shca_list_lock, flags);
1019                         if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1020                                                    30 * 1000))
1021                                 ehca_gen_err("DMEM operations are not allowed"
1022                                              "in conjunction with eHCA");
1023                         return NOTIFY_BAD;
1024                 }
1025         }
1026         return NOTIFY_OK;
1027 }
1028
1029 static struct notifier_block ehca_mem_nb = {
1030         .notifier_call = ehca_mem_notifier,
1031 };
1032
1033 static int __init ehca_module_init(void)
1034 {
1035         int ret;
1036
1037         printk(KERN_INFO "eHCA Infiniband Device Driver "
1038                "(Version " HCAD_VERSION ")\n");
1039
1040         ret = ehca_create_comp_pool();
1041         if (ret) {
1042                 ehca_gen_err("Cannot create comp pool.");
1043                 return ret;
1044         }
1045
1046         ret = ehca_create_slab_caches();
1047         if (ret) {
1048                 ehca_gen_err("Cannot create SLAB caches");
1049                 ret = -ENOMEM;
1050                 goto module_init1;
1051         }
1052
1053         ret = ehca_create_busmap();
1054         if (ret) {
1055                 ehca_gen_err("Cannot create busmap.");
1056                 goto module_init2;
1057         }
1058
1059         ret = ibmebus_register_driver(&ehca_driver);
1060         if (ret) {
1061                 ehca_gen_err("Cannot register eHCA device driver");
1062                 ret = -EINVAL;
1063                 goto module_init3;
1064         }
1065
1066         ret = register_memory_notifier(&ehca_mem_nb);
1067         if (ret) {
1068                 ehca_gen_err("Failed registering memory add/remove notifier");
1069                 goto module_init4;
1070         }
1071
1072         if (ehca_poll_all_eqs != 1) {
1073                 ehca_gen_err("WARNING!!!");
1074                 ehca_gen_err("It is possible to lose interrupts.");
1075         } else {
1076                 init_timer(&poll_eqs_timer);
1077                 poll_eqs_timer.function = ehca_poll_eqs;
1078                 poll_eqs_timer.expires = jiffies + HZ;
1079                 add_timer(&poll_eqs_timer);
1080         }
1081
1082         return 0;
1083
1084 module_init4:
1085         ibmebus_unregister_driver(&ehca_driver);
1086
1087 module_init3:
1088         ehca_destroy_busmap();
1089
1090 module_init2:
1091         ehca_destroy_slab_caches();
1092
1093 module_init1:
1094         ehca_destroy_comp_pool();
1095         return ret;
1096 };
1097
1098 static void __exit ehca_module_exit(void)
1099 {
1100         if (ehca_poll_all_eqs == 1)
1101                 del_timer_sync(&poll_eqs_timer);
1102
1103         ibmebus_unregister_driver(&ehca_driver);
1104
1105         unregister_memory_notifier(&ehca_mem_nb);
1106
1107         ehca_destroy_busmap();
1108
1109         ehca_destroy_slab_caches();
1110
1111         ehca_destroy_comp_pool();
1112
1113         idr_destroy(&ehca_cq_idr);
1114         idr_destroy(&ehca_qp_idr);
1115 };
1116
1117 module_init(ehca_module_init);
1118 module_exit(ehca_module_exit);