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 "ehca_classes.h"
  48 #include "ehca_iverbs.h"
  49 #include "ehca_mrmw.h"
  50 #include "ehca_tools.h"
  51 #include "hcp_if.h"
  52
  53 #define HCAD_VERSION "0025"
  54
  55 MODULE_LICENSE("Dual BSD/GPL");
  56 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  57 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  58 MODULE_VERSION(HCAD_VERSION);
  59
  60 int ehca_open_aqp1     = 0;
  61 int ehca_debug_level   = 0;
  62 int ehca_hw_level      = 0;
  63 int ehca_nr_ports      = 2;
  64 int ehca_use_hp_mr     = 0;
  65 int ehca_port_act_time = 30;
  66 int ehca_poll_all_eqs  = 1;
  67 int ehca_static_rate   = -1;
  68 int ehca_scaling_code  = 0;
  69 int ehca_mr_largepage  = 1;
  70 int ehca_lock_hcalls   = -1;
  71
  72 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
  73 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
  74 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
  75 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
  76 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
  77 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
  78 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
  79 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
  80 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
  81 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
  82 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
  83
  84 MODULE_PARM_DESC(open_aqp1,
  85                  "AQP1 on startup (0: no (default), 1: yes)");
  86 MODULE_PARM_DESC(debug_level,
  87                  "debug level"
  88                  " (0: no debug traces (default), 1: with debug traces)");
  89 MODULE_PARM_DESC(hw_level,
  90                  "hardware level"
  91                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  92 MODULE_PARM_DESC(nr_ports,
  93                  "number of connected ports (default: 2)");
  94 MODULE_PARM_DESC(use_hp_mr,
  95                  "high performance MRs (0: no (default), 1: yes)");
  96 MODULE_PARM_DESC(port_act_time,
  97                  "time to wait for port activation (default: 30 sec)");
  98 MODULE_PARM_DESC(poll_all_eqs,
  99                  "polls all event queues periodically"
 100                  " (0: no, 1: yes (default))");
 101 MODULE_PARM_DESC(static_rate,
 102                  "set permanent static rate (default: disabled)");
 103 MODULE_PARM_DESC(scaling_code,
 104                  "set scaling code (0: disabled/default, 1: enabled)");
 105 MODULE_PARM_DESC(mr_largepage,
 106                  "use large page for MR (0: use PAGE_SIZE (default), "
 107                  "1: use large page depending on MR size");
 108 MODULE_PARM_DESC(lock_hcalls,
 109                  "serialize all hCalls made by the driver "
 110                  "(default: autodetect)");
 111
 112 DEFINE_RWLOCK(ehca_qp_idr_lock);
 113 DEFINE_RWLOCK(ehca_cq_idr_lock);
 114 DEFINE_IDR(ehca_qp_idr);
 115 DEFINE_IDR(ehca_cq_idr);
 116
 117 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 118 static DEFINE_SPINLOCK(shca_list_lock);
 119
 120 static struct timer_list poll_eqs_timer;
 121
 122 #ifdef CONFIG_PPC_64K_PAGES
 123 static struct kmem_cache *ctblk_cache;
 124
 125 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 126 {
 127         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 128         if (!ret)
 129                 ehca_gen_err("Out of memory for ctblk");
 130         return ret;
 131 }
 132
 133 void ehca_free_fw_ctrlblock(void *ptr)
 134 {
 135         if (ptr)
 136                 kmem_cache_free(ctblk_cache, ptr);
 137
 138 }
 139 #endif
 140
 141 int ehca2ib_return_code(u64 ehca_rc)
 142 {
 143         switch (ehca_rc) {
 144         case H_SUCCESS:
 145                 return 0;
 146         case H_RESOURCE:             /* Resource in use */
 147         case H_BUSY:
 148                 return -EBUSY;
 149         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 150         case H_CONSTRAINED:          /* resource constraint */
 151         case H_NO_MEM:
 152                 return -ENOMEM;
 153         default:
 154                 return -EINVAL;
 155         }
 156 }
 157
 158 static int ehca_create_slab_caches(void)
 159 {
 160         int ret;
 161
 162         ret = ehca_init_pd_cache();
 163         if (ret) {
 164                 ehca_gen_err("Cannot create PD SLAB cache.");
 165                 return ret;
 166         }
 167
 168         ret = ehca_init_cq_cache();
 169         if (ret) {
 170                 ehca_gen_err("Cannot create CQ SLAB cache.");
 171                 goto create_slab_caches2;
 172         }
 173
 174         ret = ehca_init_qp_cache();
 175         if (ret) {
 176                 ehca_gen_err("Cannot create QP SLAB cache.");
 177                 goto create_slab_caches3;
 178         }
 179
 180         ret = ehca_init_av_cache();
 181         if (ret) {
 182                 ehca_gen_err("Cannot create AV SLAB cache.");
 183                 goto create_slab_caches4;
 184         }
 185
 186         ret = ehca_init_mrmw_cache();
 187         if (ret) {
 188                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 189                 goto create_slab_caches5;
 190         }
 191
 192         ret = ehca_init_small_qp_cache();
 193         if (ret) {
 194                 ehca_gen_err("Cannot create small queue SLAB cache.");
 195                 goto create_slab_caches6;
 196         }
 197
 198 #ifdef CONFIG_PPC_64K_PAGES
 199         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 200                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 201                                         SLAB_HWCACHE_ALIGN,
 202                                         NULL);
 203         if (!ctblk_cache) {
 204                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 205                 ehca_cleanup_small_qp_cache();
 206                 goto create_slab_caches6;
 207         }
 208 #endif
 209         return 0;
 210
 211 create_slab_caches6:
 212         ehca_cleanup_mrmw_cache();
 213
 214 create_slab_caches5:
 215         ehca_cleanup_av_cache();
 216
 217 create_slab_caches4:
 218         ehca_cleanup_qp_cache();
 219
 220 create_slab_caches3:
 221         ehca_cleanup_cq_cache();
 222
 223 create_slab_caches2:
 224         ehca_cleanup_pd_cache();
 225
 226         return ret;
 227 }
 228
 229 static void ehca_destroy_slab_caches(void)
 230 {
 231         ehca_cleanup_small_qp_cache();
 232         ehca_cleanup_mrmw_cache();
 233         ehca_cleanup_av_cache();
 234         ehca_cleanup_qp_cache();
 235         ehca_cleanup_cq_cache();
 236         ehca_cleanup_pd_cache();
 237 #ifdef CONFIG_PPC_64K_PAGES
 238         if (ctblk_cache)
 239                 kmem_cache_destroy(ctblk_cache);
 240 #endif
 241 }
 242
 243 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 244 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 245
 246 static struct cap_descr {
 247         u64 mask;
 248         char *descr;
 249 } hca_cap_descr[] = {
 250         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 251         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 252         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 253         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 254         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 255         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 256         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 257         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 258         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 259         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 260         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 261         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 262         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 263         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 264         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 265         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 266         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 267         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 268 };
 269
 270 static int ehca_sense_attributes(struct ehca_shca *shca)
 271 {
 272         int i, ret = 0;
 273         u64 h_ret;
 274         struct hipz_query_hca *rblock;
 275         struct hipz_query_port *port;
 276
 277         static const u32 pgsize_map[] = {
 278                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 279                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 280                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 281                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 282         };
 283
 284         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 285         if (!rblock) {
 286                 ehca_gen_err("Cannot allocate rblock memory.");
 287                 return -ENOMEM;
 288         }
 289
 290         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 291         if (h_ret != H_SUCCESS) {
 292                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 293                              h_ret);
 294                 ret = -EPERM;
 295                 goto sense_attributes1;
 296         }
 297
 298         if (ehca_nr_ports == 1)
 299                 shca->num_ports = 1;
 300         else
 301                 shca->num_ports = (u8)rblock->num_ports;
 302
 303         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 304
 305         if (ehca_hw_level == 0) {
 306                 u32 hcaaver;
 307                 u32 revid;
 308
 309                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 310                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 311
 312                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 313
 314                 if (hcaaver == 1) {
 315                         if (revid <= 3)
 316                                 shca->hw_level = 0x10 | (revid + 1);
 317                         else
 318                                 shca->hw_level = 0x14;
 319                 } else if (hcaaver == 2) {
 320                         if (revid == 0)
 321                                 shca->hw_level = 0x21;
 322                         else if (revid == 0x10)
 323                                 shca->hw_level = 0x22;
 324                         else if (revid == 0x20 || revid == 0x21)
 325                                 shca->hw_level = 0x23;
 326                 }
 327
 328                 if (!shca->hw_level) {
 329                         ehca_gen_warn("unknown hardware version"
 330                                       " - assuming default level");
 331                         shca->hw_level = 0x22;
 332                 }
 333         } else
 334                 shca->hw_level = ehca_hw_level;
 335         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 336
 337         shca->hca_cap = rblock->hca_cap_indicators;
 338         ehca_gen_dbg(" ... HCA capabilities:");
 339         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 340                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 341                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 342
 343         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 344          * a firmware property, so it's valid across all adapters
 345          */
 346         if (ehca_lock_hcalls == -1)
 347                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
 348
 349         /* translate supported MR page sizes; always support 4K */
 350         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 351         if (ehca_mr_largepage) { /* support extra sizes only if enabled */
 352                 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 353                         if (rblock->memory_page_size_supported & pgsize_map[i])
 354                                 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 355         }
 356
 357         /* query max MTU from first port -- it's the same for all ports */
 358         port = (struct hipz_query_port *)rblock;
 359         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 360         if (h_ret != H_SUCCESS) {
 361                 ehca_gen_err("Cannot query port properties. h_ret=%li",
 362                              h_ret);
 363                 ret = -EPERM;
 364                 goto sense_attributes1;
 365         }
 366
 367         shca->max_mtu = port->max_mtu;
 368
 369 sense_attributes1:
 370         ehca_free_fw_ctrlblock(rblock);
 371         return ret;
 372 }
 373
 374 static int init_node_guid(struct ehca_shca *shca)
 375 {
 376         int ret = 0;
 377         struct hipz_query_hca *rblock;
 378
 379         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 380         if (!rblock) {
 381                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 382                 return -ENOMEM;
 383         }
 384
 385         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 386                 ehca_err(&shca->ib_device, "Can't query device properties");
 387                 ret = -EINVAL;
 388                 goto init_node_guid1;
 389         }
 390
 391         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 392
 393 init_node_guid1:
 394         ehca_free_fw_ctrlblock(rblock);
 395         return ret;
 396 }
 397
 398 int ehca_init_device(struct ehca_shca *shca)
 399 {
 400         int ret;
 401
 402         ret = init_node_guid(shca);
 403         if (ret)
 404                 return ret;
 405
 406         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 407         shca->ib_device.owner               = THIS_MODULE;
 408
 409         shca->ib_device.uverbs_abi_ver      = 8;
 410         shca->ib_device.uverbs_cmd_mask     =
 411                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 412                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 413                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 414                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 415                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 416                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 417                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 418                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 419                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 420                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 421                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 422                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 423                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 424                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 425                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 426                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 427
 428         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 429         shca->ib_device.phys_port_cnt       = shca->num_ports;
 430         shca->ib_device.num_comp_vectors    = 1;
 431         shca->ib_device.dma_device          = &shca->ofdev->dev;
 432         shca->ib_device.query_device        = ehca_query_device;
 433         shca->ib_device.query_port          = ehca_query_port;
 434         shca->ib_device.query_gid           = ehca_query_gid;
 435         shca->ib_device.query_pkey          = ehca_query_pkey;
 436         /* shca->in_device.modify_device    = ehca_modify_device    */
 437         shca->ib_device.modify_port         = ehca_modify_port;
 438         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 439         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 440         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 441         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 442         shca->ib_device.create_ah           = ehca_create_ah;
 443         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 444         shca->ib_device.query_ah            = ehca_query_ah;
 445         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 446         shca->ib_device.create_qp           = ehca_create_qp;
 447         shca->ib_device.modify_qp           = ehca_modify_qp;
 448         shca->ib_device.query_qp            = ehca_query_qp;
 449         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 450         shca->ib_device.post_send           = ehca_post_send;
 451         shca->ib_device.post_recv           = ehca_post_recv;
 452         shca->ib_device.create_cq           = ehca_create_cq;
 453         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 454         shca->ib_device.resize_cq           = ehca_resize_cq;
 455         shca->ib_device.poll_cq             = ehca_poll_cq;
 456         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 457         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 458         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 459         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 460         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 461         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 462         shca->ib_device.query_mr            = ehca_query_mr;
 463         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 464         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 465         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 466         shca->ib_device.bind_mw             = ehca_bind_mw;
 467         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 468         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 469         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 470         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 471         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 472         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 473         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 474         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 475         shca->ib_device.mmap                = ehca_mmap;
 476
 477         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 478                 shca->ib_device.uverbs_cmd_mask |=
 479                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 480                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 481                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 482                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 483
 484                 shca->ib_device.create_srq          = ehca_create_srq;
 485                 shca->ib_device.modify_srq          = ehca_modify_srq;
 486                 shca->ib_device.query_srq           = ehca_query_srq;
 487                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 488                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 489         }
 490
 491         return ret;
 492 }
 493
 494 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 495 {
 496         struct ehca_sport *sport = &shca->sport[port - 1];
 497         struct ib_cq *ibcq;
 498         struct ib_qp *ibqp;
 499         struct ib_qp_init_attr qp_init_attr;
 500         int ret;
 501
 502         if (sport->ibcq_aqp1) {
 503                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 504                 return -EPERM;
 505         }
 506
 507         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 508         if (IS_ERR(ibcq)) {
 509                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 510                 return PTR_ERR(ibcq);
 511         }
 512         sport->ibcq_aqp1 = ibcq;
 513
 514         if (sport->ibqp_aqp1) {
 515                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 516                 ret = -EPERM;
 517                 goto create_aqp1;
 518         }
 519
 520         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 521         qp_init_attr.send_cq          = ibcq;
 522         qp_init_attr.recv_cq          = ibcq;
 523         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 524         qp_init_attr.cap.max_send_wr  = 100;
 525         qp_init_attr.cap.max_recv_wr  = 100;
 526         qp_init_attr.cap.max_send_sge = 2;
 527         qp_init_attr.cap.max_recv_sge = 1;
 528         qp_init_attr.qp_type          = IB_QPT_GSI;
 529         qp_init_attr.port_num         = port;
 530         qp_init_attr.qp_context       = NULL;
 531         qp_init_attr.event_handler    = NULL;
 532         qp_init_attr.srq              = NULL;
 533
 534         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 535         if (IS_ERR(ibqp)) {
 536                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 537                 ret = PTR_ERR(ibqp);
 538                 goto create_aqp1;
 539         }
 540         sport->ibqp_aqp1 = ibqp;
 541
 542         return 0;
 543
 544 create_aqp1:
 545         ib_destroy_cq(sport->ibcq_aqp1);
 546         return ret;
 547 }
 548
 549 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 550 {
 551         int ret;
 552
 553         ret = ib_destroy_qp(sport->ibqp_aqp1);
 554         if (ret) {
 555                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 556                 return ret;
 557         }
 558
 559         ret = ib_destroy_cq(sport->ibcq_aqp1);
 560         if (ret)
 561                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 562
 563         return ret;
 564 }
 565
 566 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 567 {
 568         return snprintf(buf, PAGE_SIZE, "%d\n",
 569                         ehca_debug_level);
 570 }
 571
 572 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 573                                       const char *buf, size_t count)
 574 {
 575         int value = (*buf) - '0';
 576         if (value >= 0 && value <= 9)
 577                 ehca_debug_level = value;
 578         return 1;
 579 }
 580
 581 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 582             ehca_show_debug_level, ehca_store_debug_level);
 583
 584 static struct attribute *ehca_drv_attrs[] = {
 585         &driver_attr_debug_level.attr,
 586         NULL
 587 };
 588
 589 static struct attribute_group ehca_drv_attr_grp = {
 590         .attrs = ehca_drv_attrs
 591 };
 592
 593 static struct attribute_group *ehca_drv_attr_groups[] = {
 594         &ehca_drv_attr_grp,
 595         NULL,
 596 };
 597
 598 #define EHCA_RESOURCE_ATTR(name)                                           \
 599 static ssize_t  ehca_show_##name(struct device *dev,                       \
 600                                  struct device_attribute *attr,            \
 601                                  char *buf)                                \
 602 {                                                                          \
 603         struct ehca_shca *shca;                                            \
 604         struct hipz_query_hca *rblock;                                     \
 605         int data;                                                          \
 606                                                                            \
 607         shca = dev->driver_data;                                           \
 608                                                                            \
 609         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 610         if (!rblock) {                                                     \
 611                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 612                 return 0;                                                  \
 613         }                                                                  \
 614                                                                            \
 615         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 616                 dev_err(dev, "Can't query device properties\n");           \
 617                 ehca_free_fw_ctrlblock(rblock);                            \
 618                 return 0;                                                  \
 619         }                                                                  \
 620                                                                            \
 621         data = rblock->name;                                               \
 622         ehca_free_fw_ctrlblock(rblock);                                    \
 623                                                                            \
 624         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 625                 return snprintf(buf, 256, "1\n");                          \
 626         else                                                               \
 627                 return snprintf(buf, 256, "%d\n", data);                   \
 628                                                                            \
 629 }                                                                          \
 630 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 631
 632 EHCA_RESOURCE_ATTR(num_ports);
 633 EHCA_RESOURCE_ATTR(hw_ver);
 634 EHCA_RESOURCE_ATTR(max_eq);
 635 EHCA_RESOURCE_ATTR(cur_eq);
 636 EHCA_RESOURCE_ATTR(max_cq);
 637 EHCA_RESOURCE_ATTR(cur_cq);
 638 EHCA_RESOURCE_ATTR(max_qp);
 639 EHCA_RESOURCE_ATTR(cur_qp);
 640 EHCA_RESOURCE_ATTR(max_mr);
 641 EHCA_RESOURCE_ATTR(cur_mr);
 642 EHCA_RESOURCE_ATTR(max_mw);
 643 EHCA_RESOURCE_ATTR(cur_mw);
 644 EHCA_RESOURCE_ATTR(max_pd);
 645 EHCA_RESOURCE_ATTR(max_ah);
 646
 647 static ssize_t ehca_show_adapter_handle(struct device *dev,
 648                                         struct device_attribute *attr,
 649                                         char *buf)
 650 {
 651         struct ehca_shca *shca = dev->driver_data;
 652
 653         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 654
 655 }
 656 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 657
 658 static ssize_t ehca_show_mr_largepage(struct device *dev,
 659                                       struct device_attribute *attr,
 660                                       char *buf)
 661 {
 662         return sprintf(buf, "%d\n", ehca_mr_largepage);
 663 }
 664 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
 665
 666 static struct attribute *ehca_dev_attrs[] = {
 667         &dev_attr_adapter_handle.attr,
 668         &dev_attr_num_ports.attr,
 669         &dev_attr_hw_ver.attr,
 670         &dev_attr_max_eq.attr,
 671         &dev_attr_cur_eq.attr,
 672         &dev_attr_max_cq.attr,
 673         &dev_attr_cur_cq.attr,
 674         &dev_attr_max_qp.attr,
 675         &dev_attr_cur_qp.attr,
 676         &dev_attr_max_mr.attr,
 677         &dev_attr_cur_mr.attr,
 678         &dev_attr_max_mw.attr,
 679         &dev_attr_cur_mw.attr,
 680         &dev_attr_max_pd.attr,
 681         &dev_attr_max_ah.attr,
 682         &dev_attr_mr_largepage.attr,
 683         NULL
 684 };
 685
 686 static struct attribute_group ehca_dev_attr_grp = {
 687         .attrs = ehca_dev_attrs
 688 };
 689
 690 static int __devinit ehca_probe(struct of_device *dev,
 691                                 const struct of_device_id *id)
 692 {
 693         struct ehca_shca *shca;
 694         const u64 *handle;
 695         struct ib_pd *ibpd;
 696         int ret;
 697
 698         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 699         if (!handle) {
 700                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 701                              dev->node->full_name);
 702                 return -ENODEV;
 703         }
 704
 705         if (!(*handle)) {
 706                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 707                              dev->node->full_name);
 708                 return -ENODEV;
 709         }
 710
 711         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 712         if (!shca) {
 713                 ehca_gen_err("Cannot allocate shca memory.");
 714                 return -ENOMEM;
 715         }
 716         mutex_init(&shca->modify_mutex);
 717
 718         shca->ofdev = dev;
 719         shca->ipz_hca_handle.handle = *handle;
 720         dev->dev.driver_data = shca;
 721
 722         ret = ehca_sense_attributes(shca);
 723         if (ret < 0) {
 724                 ehca_gen_err("Cannot sense eHCA attributes.");
 725                 goto probe1;
 726         }
 727
 728         ret = ehca_init_device(shca);
 729         if (ret) {
 730                 ehca_gen_err("Cannot init ehca  device struct");
 731                 goto probe1;
 732         }
 733
 734         /* create event queues */
 735         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 736         if (ret) {
 737                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 738                 goto probe1;
 739         }
 740
 741         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 742         if (ret) {
 743                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 744                 goto probe3;
 745         }
 746
 747         /* create internal protection domain */
 748         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 749         if (IS_ERR(ibpd)) {
 750                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 751                 ret = PTR_ERR(ibpd);
 752                 goto probe4;
 753         }
 754
 755         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 756         shca->pd->ib_pd.device = &shca->ib_device;
 757
 758         /* create internal max MR */
 759         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 760
 761         if (ret) {
 762                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 763                          ret);
 764                 goto probe5;
 765         }
 766
 767         ret = ib_register_device(&shca->ib_device);
 768         if (ret) {
 769                 ehca_err(&shca->ib_device,
 770                          "ib_register_device() failed ret=%i", ret);
 771                 goto probe6;
 772         }
 773
 774         /* create AQP1 for port 1 */
 775         if (ehca_open_aqp1 == 1) {
 776                 shca->sport[0].port_state = IB_PORT_DOWN;
 777                 ret = ehca_create_aqp1(shca, 1);
 778                 if (ret) {
 779                         ehca_err(&shca->ib_device,
 780                                  "Cannot create AQP1 for port 1.");
 781                         goto probe7;
 782                 }
 783         }
 784
 785         /* create AQP1 for port 2 */
 786         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 787                 shca->sport[1].port_state = IB_PORT_DOWN;
 788                 ret = ehca_create_aqp1(shca, 2);
 789                 if (ret) {
 790                         ehca_err(&shca->ib_device,
 791                                  "Cannot create AQP1 for port 2.");
 792                         goto probe8;
 793                 }
 794         }
 795
 796         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 797         if (ret) /* only complain; we can live without attributes */
 798                 ehca_err(&shca->ib_device,
 799                          "Cannot create device attributes  ret=%d", ret);
 800
 801         spin_lock(&shca_list_lock);
 802         list_add(&shca->shca_list, &shca_list);
 803         spin_unlock(&shca_list_lock);
 804
 805         return 0;
 806
 807 probe8:
 808         ret = ehca_destroy_aqp1(&shca->sport[0]);
 809         if (ret)
 810                 ehca_err(&shca->ib_device,
 811                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 812
 813 probe7:
 814         ib_unregister_device(&shca->ib_device);
 815
 816 probe6:
 817         ret = ehca_dereg_internal_maxmr(shca);
 818         if (ret)
 819                 ehca_err(&shca->ib_device,
 820                          "Cannot destroy internal MR. ret=%x", ret);
 821
 822 probe5:
 823         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 824         if (ret)
 825                 ehca_err(&shca->ib_device,
 826                          "Cannot destroy internal PD. ret=%x", ret);
 827
 828 probe4:
 829         ret = ehca_destroy_eq(shca, &shca->neq);
 830         if (ret)
 831                 ehca_err(&shca->ib_device,
 832                          "Cannot destroy NEQ. ret=%x", ret);
 833
 834 probe3:
 835         ret = ehca_destroy_eq(shca, &shca->eq);
 836         if (ret)
 837                 ehca_err(&shca->ib_device,
 838                          "Cannot destroy EQ. ret=%x", ret);
 839
 840 probe1:
 841         ib_dealloc_device(&shca->ib_device);
 842
 843         return -EINVAL;
 844 }
 845
 846 static int __devexit ehca_remove(struct of_device *dev)
 847 {
 848         struct ehca_shca *shca = dev->dev.driver_data;
 849         int ret;
 850
 851         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 852
 853         if (ehca_open_aqp1 == 1) {
 854                 int i;
 855                 for (i = 0; i < shca->num_ports; i++) {
 856                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 857                         if (ret)
 858                                 ehca_err(&shca->ib_device,
 859                                          "Cannot destroy AQP1 for port %x "
 860                                          "ret=%i", ret, i);
 861                 }
 862         }
 863
 864         ib_unregister_device(&shca->ib_device);
 865
 866         ret = ehca_dereg_internal_maxmr(shca);
 867         if (ret)
 868                 ehca_err(&shca->ib_device,
 869                          "Cannot destroy internal MR. ret=%i", ret);
 870
 871         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 872         if (ret)
 873                 ehca_err(&shca->ib_device,
 874                          "Cannot destroy internal PD. ret=%i", ret);
 875
 876         ret = ehca_destroy_eq(shca, &shca->eq);
 877         if (ret)
 878                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 879
 880         ret = ehca_destroy_eq(shca, &shca->neq);
 881         if (ret)
 882                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 883
 884         ib_dealloc_device(&shca->ib_device);
 885
 886         spin_lock(&shca_list_lock);
 887         list_del(&shca->shca_list);
 888         spin_unlock(&shca_list_lock);
 889
 890         return ret;
 891 }
 892
 893 static struct of_device_id ehca_device_table[] =
 894 {
 895         {
 896                 .name       = "lhca",
 897                 .compatible = "IBM,lhca",
 898         },
 899         {},
 900 };
 901
 902 static struct of_platform_driver ehca_driver = {
 903         .name        = "ehca",
 904         .match_table = ehca_device_table,
 905         .probe       = ehca_probe,
 906         .remove      = ehca_remove,
 907         .driver      = {
 908                 .groups = ehca_drv_attr_groups,
 909         },
 910 };
 911
 912 void ehca_poll_eqs(unsigned long data)
 913 {
 914         struct ehca_shca *shca;
 915
 916         spin_lock(&shca_list_lock);
 917         list_for_each_entry(shca, &shca_list, shca_list) {
 918                 if (shca->eq.is_initialized) {
 919                         /* call deadman proc only if eq ptr does not change */
 920                         struct ehca_eq *eq = &shca->eq;
 921                         int max = 3;
 922                         volatile u64 q_ofs, q_ofs2;
 923                         u64 flags;
 924                         spin_lock_irqsave(&eq->spinlock, flags);
 925                         q_ofs = eq->ipz_queue.current_q_offset;
 926                         spin_unlock_irqrestore(&eq->spinlock, flags);
 927                         do {
 928                                 spin_lock_irqsave(&eq->spinlock, flags);
 929                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 930                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 931                                 max--;
 932                         } while (q_ofs == q_ofs2 && max > 0);
 933                         if (q_ofs == q_ofs2)
 934                                 ehca_process_eq(shca, 0);
 935                 }
 936         }
 937         mod_timer(&poll_eqs_timer, jiffies + HZ);
 938         spin_unlock(&shca_list_lock);
 939 }
 940
 941 int __init ehca_module_init(void)
 942 {
 943         int ret;
 944
 945         printk(KERN_INFO "eHCA Infiniband Device Driver "
 946                "(Version " HCAD_VERSION ")\n");
 947
 948         ret = ehca_create_comp_pool();
 949         if (ret) {
 950                 ehca_gen_err("Cannot create comp pool.");
 951                 return ret;
 952         }
 953
 954         ret = ehca_create_slab_caches();
 955         if (ret) {
 956                 ehca_gen_err("Cannot create SLAB caches");
 957                 ret = -ENOMEM;
 958                 goto module_init1;
 959         }
 960
 961         ret = ibmebus_register_driver(&ehca_driver);
 962         if (ret) {
 963                 ehca_gen_err("Cannot register eHCA device driver");
 964                 ret = -EINVAL;
 965                 goto module_init2;
 966         }
 967
 968         if (ehca_poll_all_eqs != 1) {
 969                 ehca_gen_err("WARNING!!!");
 970                 ehca_gen_err("It is possible to lose interrupts.");
 971         } else {
 972                 init_timer(&poll_eqs_timer);
 973                 poll_eqs_timer.function = ehca_poll_eqs;
 974                 poll_eqs_timer.expires = jiffies + HZ;
 975                 add_timer(&poll_eqs_timer);
 976         }
 977
 978         return 0;
 979
 980 module_init2:
 981         ehca_destroy_slab_caches();
 982
 983 module_init1:
 984         ehca_destroy_comp_pool();
 985         return ret;
 986 };
 987
 988 void __exit ehca_module_exit(void)
 989 {
 990         if (ehca_poll_all_eqs == 1)
 991                 del_timer_sync(&poll_eqs_timer);
 992
 993         ibmebus_unregister_driver(&ehca_driver);
 994
 995         ehca_destroy_slab_caches();
 996
 997         ehca_destroy_comp_pool();
 998
 999         idr_destroy(&ehca_cq_idr);
1000         idr_destroy(&ehca_qp_idr);
1001 };
1002
1003 module_init(ehca_module_init);
1004 module_exit(ehca_module_exit);