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