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   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 "0026"
  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 int ehca_open_aqp1     = 0;
  63 static int ehca_hw_level      = 0;
  64 static int ehca_poll_all_eqs  = 1;
  65
  66 int ehca_debug_level   = 0;
  67 int ehca_nr_ports      = 2;
  68 int ehca_use_hp_mr     = 0;
  69 int ehca_port_act_time = 30;
  70 int ehca_static_rate   = -1;
  71 int 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,   bool, 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, 1: port one only, "
  99                  "2: two ports (default)");
 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 static 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                 goto create_slab_caches6;
 215         }
 216 #endif
 217         return 0;
 218
 219 create_slab_caches6:
 220         ehca_cleanup_mrmw_cache();
 221
 222 create_slab_caches5:
 223         ehca_cleanup_av_cache();
 224
 225 create_slab_caches4:
 226         ehca_cleanup_qp_cache();
 227
 228 create_slab_caches3:
 229         ehca_cleanup_cq_cache();
 230
 231 create_slab_caches2:
 232         ehca_cleanup_pd_cache();
 233
 234         return ret;
 235 }
 236
 237 static void ehca_destroy_slab_caches(void)
 238 {
 239         ehca_cleanup_small_qp_cache();
 240         ehca_cleanup_mrmw_cache();
 241         ehca_cleanup_av_cache();
 242         ehca_cleanup_qp_cache();
 243         ehca_cleanup_cq_cache();
 244         ehca_cleanup_pd_cache();
 245 #ifdef CONFIG_PPC_64K_PAGES
 246         if (ctblk_cache)
 247                 kmem_cache_destroy(ctblk_cache);
 248 #endif
 249 }
 250
 251 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 252 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 253
 254 static struct cap_descr {
 255         u64 mask;
 256         char *descr;
 257 } hca_cap_descr[] = {
 258         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 259         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 260         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 261         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 262         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 263         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 264         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 265         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 266         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 267         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 268         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 269         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 270         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 271         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 272         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 273         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 274         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 275         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 276 };
 277
 278 static int ehca_sense_attributes(struct ehca_shca *shca)
 279 {
 280         int i, ret = 0;
 281         u64 h_ret;
 282         struct hipz_query_hca *rblock;
 283         struct hipz_query_port *port;
 284         const char *loc_code;
 285
 286         static const u32 pgsize_map[] = {
 287                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 288                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 289                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 290                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 291         };
 292
 293         ehca_gen_dbg("Probing adapter %s...",
 294                      shca->ofdev->node->full_name);
 295         loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
 296         if (loc_code)
 297                 ehca_gen_dbg(" ... location lode=%s", loc_code);
 298
 299         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 300         if (!rblock) {
 301                 ehca_gen_err("Cannot allocate rblock memory.");
 302                 return -ENOMEM;
 303         }
 304
 305         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 306         if (h_ret != H_SUCCESS) {
 307                 ehca_gen_err("Cannot query device properties. h_ret=%lli",
 308                              h_ret);
 309                 ret = -EPERM;
 310                 goto sense_attributes1;
 311         }
 312
 313         if (ehca_nr_ports == 1)
 314                 shca->num_ports = 1;
 315         else
 316                 shca->num_ports = (u8)rblock->num_ports;
 317
 318         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 319
 320         if (ehca_hw_level == 0) {
 321                 u32 hcaaver;
 322                 u32 revid;
 323
 324                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 325                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 326
 327                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 328
 329                 if (hcaaver == 1) {
 330                         if (revid <= 3)
 331                                 shca->hw_level = 0x10 | (revid + 1);
 332                         else
 333                                 shca->hw_level = 0x14;
 334                 } else if (hcaaver == 2) {
 335                         if (revid == 0)
 336                                 shca->hw_level = 0x21;
 337                         else if (revid == 0x10)
 338                                 shca->hw_level = 0x22;
 339                         else if (revid == 0x20 || revid == 0x21)
 340                                 shca->hw_level = 0x23;
 341                 }
 342
 343                 if (!shca->hw_level) {
 344                         ehca_gen_warn("unknown hardware version"
 345                                       " - assuming default level");
 346                         shca->hw_level = 0x22;
 347                 }
 348         } else
 349                 shca->hw_level = ehca_hw_level;
 350         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 351
 352         shca->hca_cap = rblock->hca_cap_indicators;
 353         ehca_gen_dbg(" ... HCA capabilities:");
 354         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 355                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 356                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 357
 358         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 359          * a firmware property, so it's valid across all adapters
 360          */
 361         if (ehca_lock_hcalls == -1)
 362                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
 363
 364         /* translate supported MR page sizes; always support 4K */
 365         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 366         for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 367                 if (rblock->memory_page_size_supported & pgsize_map[i])
 368                         shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 369
 370         /* Set maximum number of CQs and QPs to calculate EQ size */
 371         if (shca->max_num_qps == -1)
 372                 shca->max_num_qps = min_t(int, rblock->max_qp,
 373                                           EHCA_MAX_NUM_QUEUES);
 374         else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
 375                 ehca_gen_warn("The requested number of QPs is out of range "
 376                               "(1 - %i) specified by HW. Value is set to %i",
 377                               rblock->max_qp, rblock->max_qp);
 378                 shca->max_num_qps = rblock->max_qp;
 379         }
 380
 381         if (shca->max_num_cqs == -1)
 382                 shca->max_num_cqs = min_t(int, rblock->max_cq,
 383                                           EHCA_MAX_NUM_QUEUES);
 384         else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
 385                 ehca_gen_warn("The requested number of CQs is out of range "
 386                               "(1 - %i) specified by HW. Value is set to %i",
 387                               rblock->max_cq, rblock->max_cq);
 388         }
 389
 390         /* query max MTU from first port -- it's the same for all ports */
 391         port = (struct hipz_query_port *)rblock;
 392         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 393         if (h_ret != H_SUCCESS) {
 394                 ehca_gen_err("Cannot query port properties. h_ret=%lli",
 395                              h_ret);
 396                 ret = -EPERM;
 397                 goto sense_attributes1;
 398         }
 399
 400         shca->max_mtu = port->max_mtu;
 401
 402 sense_attributes1:
 403         ehca_free_fw_ctrlblock(rblock);
 404         return ret;
 405 }
 406
 407 static int init_node_guid(struct ehca_shca *shca)
 408 {
 409         int ret = 0;
 410         struct hipz_query_hca *rblock;
 411
 412         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 413         if (!rblock) {
 414                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 415                 return -ENOMEM;
 416         }
 417
 418         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 419                 ehca_err(&shca->ib_device, "Can't query device properties");
 420                 ret = -EINVAL;
 421                 goto init_node_guid1;
 422         }
 423
 424         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 425
 426 init_node_guid1:
 427         ehca_free_fw_ctrlblock(rblock);
 428         return ret;
 429 }
 430
 431 static int ehca_init_device(struct ehca_shca *shca)
 432 {
 433         int ret;
 434
 435         ret = init_node_guid(shca);
 436         if (ret)
 437                 return ret;
 438
 439         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 440         shca->ib_device.owner               = THIS_MODULE;
 441
 442         shca->ib_device.uverbs_abi_ver      = 8;
 443         shca->ib_device.uverbs_cmd_mask     =
 444                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 445                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 446                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 447                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 448                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 449                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 450                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 451                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 452                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 453                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 454                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 455                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 456                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 457                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 458                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 459                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 460
 461         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 462         shca->ib_device.phys_port_cnt       = shca->num_ports;
 463         shca->ib_device.num_comp_vectors    = 1;
 464         shca->ib_device.dma_device          = &shca->ofdev->dev;
 465         shca->ib_device.query_device        = ehca_query_device;
 466         shca->ib_device.query_port          = ehca_query_port;
 467         shca->ib_device.query_gid           = ehca_query_gid;
 468         shca->ib_device.query_pkey          = ehca_query_pkey;
 469         /* shca->in_device.modify_device    = ehca_modify_device    */
 470         shca->ib_device.modify_port         = ehca_modify_port;
 471         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 472         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 473         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 474         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 475         shca->ib_device.create_ah           = ehca_create_ah;
 476         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 477         shca->ib_device.query_ah            = ehca_query_ah;
 478         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 479         shca->ib_device.create_qp           = ehca_create_qp;
 480         shca->ib_device.modify_qp           = ehca_modify_qp;
 481         shca->ib_device.query_qp            = ehca_query_qp;
 482         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 483         shca->ib_device.post_send           = ehca_post_send;
 484         shca->ib_device.post_recv           = ehca_post_recv;
 485         shca->ib_device.create_cq           = ehca_create_cq;
 486         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 487         shca->ib_device.resize_cq           = ehca_resize_cq;
 488         shca->ib_device.poll_cq             = ehca_poll_cq;
 489         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 490         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 491         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 492         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 493         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 494         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 495         shca->ib_device.query_mr            = ehca_query_mr;
 496         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 497         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 498         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 499         shca->ib_device.bind_mw             = ehca_bind_mw;
 500         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 501         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 502         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 503         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 504         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 505         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 506         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 507         shca->ib_device.process_mad         = ehca_process_mad;
 508         shca->ib_device.mmap                = ehca_mmap;
 509
 510         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 511                 shca->ib_device.uverbs_cmd_mask |=
 512                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 513                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 514                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 515                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 516
 517                 shca->ib_device.create_srq          = ehca_create_srq;
 518                 shca->ib_device.modify_srq          = ehca_modify_srq;
 519                 shca->ib_device.query_srq           = ehca_query_srq;
 520                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 521                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 522         }
 523
 524         return ret;
 525 }
 526
 527 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 528 {
 529         struct ehca_sport *sport = &shca->sport[port - 1];
 530         struct ib_cq *ibcq;
 531         struct ib_qp *ibqp;
 532         struct ib_qp_init_attr qp_init_attr;
 533         int ret;
 534
 535         if (sport->ibcq_aqp1) {
 536                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 537                 return -EPERM;
 538         }
 539
 540         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 541         if (IS_ERR(ibcq)) {
 542                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 543                 return PTR_ERR(ibcq);
 544         }
 545         sport->ibcq_aqp1 = ibcq;
 546
 547         if (sport->ibqp_sqp[IB_QPT_GSI]) {
 548                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 549                 ret = -EPERM;
 550                 goto create_aqp1;
 551         }
 552
 553         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 554         qp_init_attr.send_cq          = ibcq;
 555         qp_init_attr.recv_cq          = ibcq;
 556         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 557         qp_init_attr.cap.max_send_wr  = 100;
 558         qp_init_attr.cap.max_recv_wr  = 100;
 559         qp_init_attr.cap.max_send_sge = 2;
 560         qp_init_attr.cap.max_recv_sge = 1;
 561         qp_init_attr.qp_type          = IB_QPT_GSI;
 562         qp_init_attr.port_num         = port;
 563         qp_init_attr.qp_context       = NULL;
 564         qp_init_attr.event_handler    = NULL;
 565         qp_init_attr.srq              = NULL;
 566
 567         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 568         if (IS_ERR(ibqp)) {
 569                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 570                 ret = PTR_ERR(ibqp);
 571                 goto create_aqp1;
 572         }
 573         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
 574
 575         return 0;
 576
 577 create_aqp1:
 578         ib_destroy_cq(sport->ibcq_aqp1);
 579         return ret;
 580 }
 581
 582 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 583 {
 584         int ret;
 585
 586         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
 587         if (ret) {
 588                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 589                 return ret;
 590         }
 591
 592         ret = ib_destroy_cq(sport->ibcq_aqp1);
 593         if (ret)
 594                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 595
 596         return ret;
 597 }
 598
 599 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 600 {
 601         return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
 602 }
 603
 604 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 605                                       const char *buf, size_t count)
 606 {
 607         int value = (*buf) - '0';
 608         if (value >= 0 && value <= 9)
 609                 ehca_debug_level = value;
 610         return 1;
 611 }
 612
 613 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 614                    ehca_show_debug_level, ehca_store_debug_level);
 615
 616 static struct attribute *ehca_drv_attrs[] = {
 617         &driver_attr_debug_level.attr,
 618         NULL
 619 };
 620
 621 static struct attribute_group ehca_drv_attr_grp = {
 622         .attrs = ehca_drv_attrs
 623 };
 624
 625 static struct attribute_group *ehca_drv_attr_groups[] = {
 626         &ehca_drv_attr_grp,
 627         NULL,
 628 };
 629
 630 #define EHCA_RESOURCE_ATTR(name)                                           \
 631 static ssize_t  ehca_show_##name(struct device *dev,                       \
 632                                  struct device_attribute *attr,            \
 633                                  char *buf)                                \
 634 {                                                                          \
 635         struct ehca_shca *shca;                                            \
 636         struct hipz_query_hca *rblock;                                     \
 637         int data;                                                          \
 638                                                                            \
 639         shca = dev->driver_data;                                           \
 640                                                                            \
 641         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 642         if (!rblock) {                                                     \
 643                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 644                 return 0;                                                  \
 645         }                                                                  \
 646                                                                            \
 647         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 648                 dev_err(dev, "Can't query device properties\n");           \
 649                 ehca_free_fw_ctrlblock(rblock);                            \
 650                 return 0;                                                  \
 651         }                                                                  \
 652                                                                            \
 653         data = rblock->name;                                               \
 654         ehca_free_fw_ctrlblock(rblock);                                    \
 655                                                                            \
 656         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 657                 return snprintf(buf, 256, "1\n");                          \
 658         else                                                               \
 659                 return snprintf(buf, 256, "%d\n", data);                   \
 660                                                                            \
 661 }                                                                          \
 662 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 663
 664 EHCA_RESOURCE_ATTR(num_ports);
 665 EHCA_RESOURCE_ATTR(hw_ver);
 666 EHCA_RESOURCE_ATTR(max_eq);
 667 EHCA_RESOURCE_ATTR(cur_eq);
 668 EHCA_RESOURCE_ATTR(max_cq);
 669 EHCA_RESOURCE_ATTR(cur_cq);
 670 EHCA_RESOURCE_ATTR(max_qp);
 671 EHCA_RESOURCE_ATTR(cur_qp);
 672 EHCA_RESOURCE_ATTR(max_mr);
 673 EHCA_RESOURCE_ATTR(cur_mr);
 674 EHCA_RESOURCE_ATTR(max_mw);
 675 EHCA_RESOURCE_ATTR(cur_mw);
 676 EHCA_RESOURCE_ATTR(max_pd);
 677 EHCA_RESOURCE_ATTR(max_ah);
 678
 679 static ssize_t ehca_show_adapter_handle(struct device *dev,
 680                                         struct device_attribute *attr,
 681                                         char *buf)
 682 {
 683         struct ehca_shca *shca = dev->driver_data;
 684
 685         return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
 686
 687 }
 688 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 689
 690 static struct attribute *ehca_dev_attrs[] = {
 691         &dev_attr_adapter_handle.attr,
 692         &dev_attr_num_ports.attr,
 693         &dev_attr_hw_ver.attr,
 694         &dev_attr_max_eq.attr,
 695         &dev_attr_cur_eq.attr,
 696         &dev_attr_max_cq.attr,
 697         &dev_attr_cur_cq.attr,
 698         &dev_attr_max_qp.attr,
 699         &dev_attr_cur_qp.attr,
 700         &dev_attr_max_mr.attr,
 701         &dev_attr_cur_mr.attr,
 702         &dev_attr_max_mw.attr,
 703         &dev_attr_cur_mw.attr,
 704         &dev_attr_max_pd.attr,
 705         &dev_attr_max_ah.attr,
 706         NULL
 707 };
 708
 709 static struct attribute_group ehca_dev_attr_grp = {
 710         .attrs = ehca_dev_attrs
 711 };
 712
 713 static int __devinit ehca_probe(struct of_device *dev,
 714                                 const struct of_device_id *id)
 715 {
 716         struct ehca_shca *shca;
 717         const u64 *handle;
 718         struct ib_pd *ibpd;
 719         int ret, i, eq_size;
 720         unsigned long flags;
 721
 722         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 723         if (!handle) {
 724                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 725                              dev->node->full_name);
 726                 return -ENODEV;
 727         }
 728
 729         if (!(*handle)) {
 730                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 731                              dev->node->full_name);
 732                 return -ENODEV;
 733         }
 734
 735         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 736         if (!shca) {
 737                 ehca_gen_err("Cannot allocate shca memory.");
 738                 return -ENOMEM;
 739         }
 740
 741         mutex_init(&shca->modify_mutex);
 742         atomic_set(&shca->num_cqs, 0);
 743         atomic_set(&shca->num_qps, 0);
 744         shca->max_num_qps = ehca_max_qp;
 745         shca->max_num_cqs = ehca_max_cq;
 746
 747         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 748                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
 749
 750         shca->ofdev = dev;
 751         shca->ipz_hca_handle.handle = *handle;
 752         dev->dev.driver_data = shca;
 753
 754         ret = ehca_sense_attributes(shca);
 755         if (ret < 0) {
 756                 ehca_gen_err("Cannot sense eHCA attributes.");
 757                 goto probe1;
 758         }
 759
 760         ret = ehca_init_device(shca);
 761         if (ret) {
 762                 ehca_gen_err("Cannot init ehca  device struct");
 763                 goto probe1;
 764         }
 765
 766         eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
 767         /* create event queues */
 768         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
 769         if (ret) {
 770                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 771                 goto probe1;
 772         }
 773
 774         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 775         if (ret) {
 776                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 777                 goto probe3;
 778         }
 779
 780         /* create internal protection domain */
 781         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 782         if (IS_ERR(ibpd)) {
 783                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 784                 ret = PTR_ERR(ibpd);
 785                 goto probe4;
 786         }
 787
 788         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 789         shca->pd->ib_pd.device = &shca->ib_device;
 790
 791         /* create internal max MR */
 792         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 793
 794         if (ret) {
 795                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 796                          ret);
 797                 goto probe5;
 798         }
 799
 800         ret = ib_register_device(&shca->ib_device);
 801         if (ret) {
 802                 ehca_err(&shca->ib_device,
 803                          "ib_register_device() failed ret=%i", ret);
 804                 goto probe6;
 805         }
 806
 807         /* create AQP1 for port 1 */
 808         if (ehca_open_aqp1 == 1) {
 809                 shca->sport[0].port_state = IB_PORT_DOWN;
 810                 ret = ehca_create_aqp1(shca, 1);
 811                 if (ret) {
 812                         ehca_err(&shca->ib_device,
 813                                  "Cannot create AQP1 for port 1.");
 814                         goto probe7;
 815                 }
 816         }
 817
 818         /* create AQP1 for port 2 */
 819         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 820                 shca->sport[1].port_state = IB_PORT_DOWN;
 821                 ret = ehca_create_aqp1(shca, 2);
 822                 if (ret) {
 823                         ehca_err(&shca->ib_device,
 824                                  "Cannot create AQP1 for port 2.");
 825                         goto probe8;
 826                 }
 827         }
 828
 829         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 830         if (ret) /* only complain; we can live without attributes */
 831                 ehca_err(&shca->ib_device,
 832                          "Cannot create device attributes  ret=%d", ret);
 833
 834         spin_lock_irqsave(&shca_list_lock, flags);
 835         list_add(&shca->shca_list, &shca_list);
 836         spin_unlock_irqrestore(&shca_list_lock, flags);
 837
 838         return 0;
 839
 840 probe8:
 841         ret = ehca_destroy_aqp1(&shca->sport[0]);
 842         if (ret)
 843                 ehca_err(&shca->ib_device,
 844                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 845
 846 probe7:
 847         ib_unregister_device(&shca->ib_device);
 848
 849 probe6:
 850         ret = ehca_dereg_internal_maxmr(shca);
 851         if (ret)
 852                 ehca_err(&shca->ib_device,
 853                          "Cannot destroy internal MR. ret=%x", ret);
 854
 855 probe5:
 856         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 857         if (ret)
 858                 ehca_err(&shca->ib_device,
 859                          "Cannot destroy internal PD. ret=%x", ret);
 860
 861 probe4:
 862         ret = ehca_destroy_eq(shca, &shca->neq);
 863         if (ret)
 864                 ehca_err(&shca->ib_device,
 865                          "Cannot destroy NEQ. ret=%x", ret);
 866
 867 probe3:
 868         ret = ehca_destroy_eq(shca, &shca->eq);
 869         if (ret)
 870                 ehca_err(&shca->ib_device,
 871                          "Cannot destroy EQ. ret=%x", ret);
 872
 873 probe1:
 874         ib_dealloc_device(&shca->ib_device);
 875
 876         return -EINVAL;
 877 }
 878
 879 static int __devexit ehca_remove(struct of_device *dev)
 880 {
 881         struct ehca_shca *shca = dev->dev.driver_data;
 882         unsigned long flags;
 883         int ret;
 884
 885         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 886
 887         if (ehca_open_aqp1 == 1) {
 888                 int i;
 889                 for (i = 0; i < shca->num_ports; i++) {
 890                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 891                         if (ret)
 892                                 ehca_err(&shca->ib_device,
 893                                          "Cannot destroy AQP1 for port %x "
 894                                          "ret=%i", ret, i);
 895                 }
 896         }
 897
 898         ib_unregister_device(&shca->ib_device);
 899
 900         ret = ehca_dereg_internal_maxmr(shca);
 901         if (ret)
 902                 ehca_err(&shca->ib_device,
 903                          "Cannot destroy internal MR. ret=%i", ret);
 904
 905         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 906         if (ret)
 907                 ehca_err(&shca->ib_device,
 908                          "Cannot destroy internal PD. ret=%i", ret);
 909
 910         ret = ehca_destroy_eq(shca, &shca->eq);
 911         if (ret)
 912                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 913
 914         ret = ehca_destroy_eq(shca, &shca->neq);
 915         if (ret)
 916                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 917
 918         ib_dealloc_device(&shca->ib_device);
 919
 920         spin_lock_irqsave(&shca_list_lock, flags);
 921         list_del(&shca->shca_list);
 922         spin_unlock_irqrestore(&shca_list_lock, flags);
 923
 924         return ret;
 925 }
 926
 927 static struct of_device_id ehca_device_table[] =
 928 {
 929         {
 930                 .name       = "lhca",
 931                 .compatible = "IBM,lhca",
 932         },
 933         {},
 934 };
 935 MODULE_DEVICE_TABLE(of, ehca_device_table);
 936
 937 static struct of_platform_driver ehca_driver = {
 938         .name        = "ehca",
 939         .match_table = ehca_device_table,
 940         .probe       = ehca_probe,
 941         .remove      = ehca_remove,
 942         .driver      = {
 943                 .groups = ehca_drv_attr_groups,
 944         },
 945 };
 946
 947 void ehca_poll_eqs(unsigned long data)
 948 {
 949         struct ehca_shca *shca;
 950
 951         spin_lock(&shca_list_lock);
 952         list_for_each_entry(shca, &shca_list, shca_list) {
 953                 if (shca->eq.is_initialized) {
 954                         /* call deadman proc only if eq ptr does not change */
 955                         struct ehca_eq *eq = &shca->eq;
 956                         int max = 3;
 957                         volatile u64 q_ofs, q_ofs2;
 958                         unsigned long flags;
 959                         spin_lock_irqsave(&eq->spinlock, flags);
 960                         q_ofs = eq->ipz_queue.current_q_offset;
 961                         spin_unlock_irqrestore(&eq->spinlock, flags);
 962                         do {
 963                                 spin_lock_irqsave(&eq->spinlock, flags);
 964                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 965                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 966                                 max--;
 967                         } while (q_ofs == q_ofs2 && max > 0);
 968                         if (q_ofs == q_ofs2)
 969                                 ehca_process_eq(shca, 0);
 970                 }
 971         }
 972         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
 973         spin_unlock(&shca_list_lock);
 974 }
 975
 976 static int ehca_mem_notifier(struct notifier_block *nb,
 977                              unsigned long action, void *data)
 978 {
 979         static unsigned long ehca_dmem_warn_time;
 980         unsigned long flags;
 981
 982         switch (action) {
 983         case MEM_CANCEL_OFFLINE:
 984         case MEM_CANCEL_ONLINE:
 985         case MEM_ONLINE:
 986         case MEM_OFFLINE:
 987                 return NOTIFY_OK;
 988         case MEM_GOING_ONLINE:
 989         case MEM_GOING_OFFLINE:
 990                 /* only ok if no hca is attached to the lpar */
 991                 spin_lock_irqsave(&shca_list_lock, flags);
 992                 if (list_empty(&shca_list)) {
 993                         spin_unlock_irqrestore(&shca_list_lock, flags);
 994                         return NOTIFY_OK;
 995                 } else {
 996                         spin_unlock_irqrestore(&shca_list_lock, flags);
 997                         if (printk_timed_ratelimit(&ehca_dmem_warn_time,
 998                                                    30 * 1000))
 999                                 ehca_gen_err("DMEM operations are not allowed"
1000                                              "in conjunction with eHCA");
1001                         return NOTIFY_BAD;
1002                 }
1003         }
1004         return NOTIFY_OK;
1005 }
1006
1007 static struct notifier_block ehca_mem_nb = {
1008         .notifier_call = ehca_mem_notifier,
1009 };
1010
1011 static int __init ehca_module_init(void)
1012 {
1013         int ret;
1014
1015         printk(KERN_INFO "eHCA Infiniband Device Driver "
1016                "(Version " HCAD_VERSION ")\n");
1017
1018         ret = ehca_create_comp_pool();
1019         if (ret) {
1020                 ehca_gen_err("Cannot create comp pool.");
1021                 return ret;
1022         }
1023
1024         ret = ehca_create_slab_caches();
1025         if (ret) {
1026                 ehca_gen_err("Cannot create SLAB caches");
1027                 ret = -ENOMEM;
1028                 goto module_init1;
1029         }
1030
1031         ret = ibmebus_register_driver(&ehca_driver);
1032         if (ret) {
1033                 ehca_gen_err("Cannot register eHCA device driver");
1034                 ret = -EINVAL;
1035                 goto module_init2;
1036         }
1037
1038         ret = register_memory_notifier(&ehca_mem_nb);
1039         if (ret) {
1040                 ehca_gen_err("Failed registering memory add/remove notifier");
1041                 goto module_init3;
1042         }
1043
1044         if (ehca_poll_all_eqs != 1) {
1045                 ehca_gen_err("WARNING!!!");
1046                 ehca_gen_err("It is possible to lose interrupts.");
1047         } else {
1048                 init_timer(&poll_eqs_timer);
1049                 poll_eqs_timer.function = ehca_poll_eqs;
1050                 poll_eqs_timer.expires = jiffies + HZ;
1051                 add_timer(&poll_eqs_timer);
1052         }
1053
1054         return 0;
1055
1056 module_init3:
1057         ibmebus_unregister_driver(&ehca_driver);
1058
1059 module_init2:
1060         ehca_destroy_slab_caches();
1061
1062 module_init1:
1063         ehca_destroy_comp_pool();
1064         return ret;
1065 };
1066
1067 static void __exit ehca_module_exit(void)
1068 {
1069         if (ehca_poll_all_eqs == 1)
1070                 del_timer_sync(&poll_eqs_timer);
1071
1072         ibmebus_unregister_driver(&ehca_driver);
1073
1074         unregister_memory_notifier(&ehca_mem_nb);
1075
1076         ehca_destroy_slab_caches();
1077
1078         ehca_destroy_comp_pool();
1079
1080         idr_destroy(&ehca_cq_idr);
1081         idr_destroy(&ehca_qp_idr);
1082 };
1083
1084 module_init(ehca_module_init);
1085 module_exit(ehca_module_exit);