drivers/infiniband/hw/ehca/ehca_main.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  module start stop, hca detection
   5  *
   6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   8  *           Joachim Fenkes <fenkes@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 #ifdef CONFIG_PPC_64K_PAGES
  44 #include <linux/slab.h>
  45 #endif
  46 #include "ehca_classes.h"
  47 #include "ehca_iverbs.h"
  48 #include "ehca_mrmw.h"
  49 #include "ehca_tools.h"
  50 #include "hcp_if.h"
  51
  52 #define HCAD_VERSION "0024"
  53
  54 MODULE_LICENSE("Dual BSD/GPL");
  55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  56 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  57 MODULE_VERSION(HCAD_VERSION);
  58
  59 int ehca_open_aqp1     = 0;
  60 int ehca_debug_level   = 0;
  61 int ehca_hw_level      = 0;
  62 int ehca_nr_ports      = 2;
  63 int ehca_use_hp_mr     = 0;
  64 int ehca_port_act_time = 30;
  65 int ehca_poll_all_eqs  = 1;
  66 int ehca_static_rate   = -1;
  67 int ehca_scaling_code  = 0;
  68 int ehca_mr_largepage  = 1;
  69
  70 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
  71 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
  72 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
  73 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
  74 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
  75 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
  76 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
  77 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
  78 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
  79 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
  80
  81 MODULE_PARM_DESC(open_aqp1,
  82                  "AQP1 on startup (0: no (default), 1: yes)");
  83 MODULE_PARM_DESC(debug_level,
  84                  "debug level"
  85                  " (0: no debug traces (default), 1: with debug traces)");
  86 MODULE_PARM_DESC(hw_level,
  87                  "hardware level"
  88                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  89 MODULE_PARM_DESC(nr_ports,
  90                  "number of connected ports (default: 2)");
  91 MODULE_PARM_DESC(use_hp_mr,
  92                  "high performance MRs (0: no (default), 1: yes)");
  93 MODULE_PARM_DESC(port_act_time,
  94                  "time to wait for port activation (default: 30 sec)");
  95 MODULE_PARM_DESC(poll_all_eqs,
  96                  "polls all event queues periodically"
  97                  " (0: no, 1: yes (default))");
  98 MODULE_PARM_DESC(static_rate,
  99                  "set permanent static rate (default: disabled)");
 100 MODULE_PARM_DESC(scaling_code,
 101                  "set scaling code (0: disabled/default, 1: enabled)");
 102 MODULE_PARM_DESC(mr_largepage,
 103                  "use large page for MR (0: use PAGE_SIZE (default), "
 104                  "1: use large page depending on MR size");
 105
 106 DEFINE_RWLOCK(ehca_qp_idr_lock);
 107 DEFINE_RWLOCK(ehca_cq_idr_lock);
 108 DEFINE_IDR(ehca_qp_idr);
 109 DEFINE_IDR(ehca_cq_idr);
 110
 111 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 112 static DEFINE_SPINLOCK(shca_list_lock);
 113
 114 static struct timer_list poll_eqs_timer;
 115
 116 #ifdef CONFIG_PPC_64K_PAGES
 117 static struct kmem_cache *ctblk_cache;
 118
 119 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 120 {
 121         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 122         if (!ret)
 123                 ehca_gen_err("Out of memory for ctblk");
 124         return ret;
 125 }
 126
 127 void ehca_free_fw_ctrlblock(void *ptr)
 128 {
 129         if (ptr)
 130                 kmem_cache_free(ctblk_cache, ptr);
 131
 132 }
 133 #endif
 134
 135 int ehca2ib_return_code(u64 ehca_rc)
 136 {
 137         switch (ehca_rc) {
 138         case H_SUCCESS:
 139                 return 0;
 140         case H_RESOURCE:             /* Resource in use */
 141         case H_BUSY:
 142                 return -EBUSY;
 143         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 144         case H_CONSTRAINED:          /* resource constraint */
 145         case H_NO_MEM:
 146                 return -ENOMEM;
 147         default:
 148                 return -EINVAL;
 149         }
 150 }
 151
 152 static int ehca_create_slab_caches(void)
 153 {
 154         int ret;
 155
 156         ret = ehca_init_pd_cache();
 157         if (ret) {
 158                 ehca_gen_err("Cannot create PD SLAB cache.");
 159                 return ret;
 160         }
 161
 162         ret = ehca_init_cq_cache();
 163         if (ret) {
 164                 ehca_gen_err("Cannot create CQ SLAB cache.");
 165                 goto create_slab_caches2;
 166         }
 167
 168         ret = ehca_init_qp_cache();
 169         if (ret) {
 170                 ehca_gen_err("Cannot create QP SLAB cache.");
 171                 goto create_slab_caches3;
 172         }
 173
 174         ret = ehca_init_av_cache();
 175         if (ret) {
 176                 ehca_gen_err("Cannot create AV SLAB cache.");
 177                 goto create_slab_caches4;
 178         }
 179
 180         ret = ehca_init_mrmw_cache();
 181         if (ret) {
 182                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 183                 goto create_slab_caches5;
 184         }
 185
 186         ret = ehca_init_small_qp_cache();
 187         if (ret) {
 188                 ehca_gen_err("Cannot create small queue SLAB cache.");
 189                 goto create_slab_caches6;
 190         }
 191
 192 #ifdef CONFIG_PPC_64K_PAGES
 193         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 194                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 195                                         SLAB_HWCACHE_ALIGN,
 196                                         NULL);
 197         if (!ctblk_cache) {
 198                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 199                 ehca_cleanup_small_qp_cache();
 200                 goto create_slab_caches6;
 201         }
 202 #endif
 203         return 0;
 204
 205 create_slab_caches6:
 206         ehca_cleanup_mrmw_cache();
 207
 208 create_slab_caches5:
 209         ehca_cleanup_av_cache();
 210
 211 create_slab_caches4:
 212         ehca_cleanup_qp_cache();
 213
 214 create_slab_caches3:
 215         ehca_cleanup_cq_cache();
 216
 217 create_slab_caches2:
 218         ehca_cleanup_pd_cache();
 219
 220         return ret;
 221 }
 222
 223 static void ehca_destroy_slab_caches(void)
 224 {
 225         ehca_cleanup_small_qp_cache();
 226         ehca_cleanup_mrmw_cache();
 227         ehca_cleanup_av_cache();
 228         ehca_cleanup_qp_cache();
 229         ehca_cleanup_cq_cache();
 230         ehca_cleanup_pd_cache();
 231 #ifdef CONFIG_PPC_64K_PAGES
 232         if (ctblk_cache)
 233                 kmem_cache_destroy(ctblk_cache);
 234 #endif
 235 }
 236
 237 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 238 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 239
 240 static struct cap_descr {
 241         u64 mask;
 242         char *descr;
 243 } hca_cap_descr[] = {
 244         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 245         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 246         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 247         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 248         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 249         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 250         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 251         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 252         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 253         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 254         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 255         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 256         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 257         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 258         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 259         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 260         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 261 };
 262
 263 static int ehca_sense_attributes(struct ehca_shca *shca)
 264 {
 265         int i, ret = 0;
 266         u64 h_ret;
 267         struct hipz_query_hca *rblock;
 268         struct hipz_query_port *port;
 269
 270         static const u32 pgsize_map[] = {
 271                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 272                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 273                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 274                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 275         };
 276
 277         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 278         if (!rblock) {
 279                 ehca_gen_err("Cannot allocate rblock memory.");
 280                 return -ENOMEM;
 281         }
 282
 283         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 284         if (h_ret != H_SUCCESS) {
 285                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 286                              h_ret);
 287                 ret = -EPERM;
 288                 goto sense_attributes1;
 289         }
 290
 291         if (ehca_nr_ports == 1)
 292                 shca->num_ports = 1;
 293         else
 294                 shca->num_ports = (u8)rblock->num_ports;
 295
 296         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 297
 298         if (ehca_hw_level == 0) {
 299                 u32 hcaaver;
 300                 u32 revid;
 301
 302                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 303                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 304
 305                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 306
 307                 if (hcaaver == 1) {
 308                         if (revid <= 3)
 309                                 shca->hw_level = 0x10 | (revid + 1);
 310                         else
 311                                 shca->hw_level = 0x14;
 312                 } else if (hcaaver == 2) {
 313                         if (revid == 0)
 314                                 shca->hw_level = 0x21;
 315                         else if (revid == 0x10)
 316                                 shca->hw_level = 0x22;
 317                         else if (revid == 0x20 || revid == 0x21)
 318                                 shca->hw_level = 0x23;
 319                 }
 320
 321                 if (!shca->hw_level) {
 322                         ehca_gen_warn("unknown hardware version"
 323                                       " - assuming default level");
 324                         shca->hw_level = 0x22;
 325                 }
 326         } else
 327                 shca->hw_level = ehca_hw_level;
 328         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 329
 330         shca->hca_cap = rblock->hca_cap_indicators;
 331         ehca_gen_dbg(" ... HCA capabilities:");
 332         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 333                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 334                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 335
 336         /* translate supported MR page sizes; always support 4K */
 337         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 338         if (ehca_mr_largepage) { /* support extra sizes only if enabled */
 339                 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 340                         if (rblock->memory_page_size_supported & pgsize_map[i])
 341                                 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 342         }
 343
 344         /* query max MTU from first port -- it's the same for all ports */
 345         port = (struct hipz_query_port *)rblock;
 346         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 347         if (h_ret != H_SUCCESS) {
 348                 ehca_gen_err("Cannot query port properties. h_ret=%li",
 349                              h_ret);
 350                 ret = -EPERM;
 351                 goto sense_attributes1;
 352         }
 353
 354         shca->max_mtu = port->max_mtu;
 355
 356 sense_attributes1:
 357         ehca_free_fw_ctrlblock(rblock);
 358         return ret;
 359 }
 360
 361 static int init_node_guid(struct ehca_shca *shca)
 362 {
 363         int ret = 0;
 364         struct hipz_query_hca *rblock;
 365
 366         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 367         if (!rblock) {
 368                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 369                 return -ENOMEM;
 370         }
 371
 372         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 373                 ehca_err(&shca->ib_device, "Can't query device properties");
 374                 ret = -EINVAL;
 375                 goto init_node_guid1;
 376         }
 377
 378         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 379
 380 init_node_guid1:
 381         ehca_free_fw_ctrlblock(rblock);
 382         return ret;
 383 }
 384
 385 int ehca_init_device(struct ehca_shca *shca)
 386 {
 387         int ret;
 388
 389         ret = init_node_guid(shca);
 390         if (ret)
 391                 return ret;
 392
 393         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 394         shca->ib_device.owner               = THIS_MODULE;
 395
 396         shca->ib_device.uverbs_abi_ver      = 8;
 397         shca->ib_device.uverbs_cmd_mask     =
 398                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 399                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 400                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 401                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 402                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 403                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 404                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 405                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 406                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 407                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 408                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 409                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 410                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 411                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 412                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 413                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 414
 415         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 416         shca->ib_device.phys_port_cnt       = shca->num_ports;
 417         shca->ib_device.num_comp_vectors    = 1;
 418         shca->ib_device.dma_device          = &shca->ofdev->dev;
 419         shca->ib_device.query_device        = ehca_query_device;
 420         shca->ib_device.query_port          = ehca_query_port;
 421         shca->ib_device.query_gid           = ehca_query_gid;
 422         shca->ib_device.query_pkey          = ehca_query_pkey;
 423         /* shca->in_device.modify_device    = ehca_modify_device    */
 424         shca->ib_device.modify_port         = ehca_modify_port;
 425         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 426         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 427         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 428         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 429         shca->ib_device.create_ah           = ehca_create_ah;
 430         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 431         shca->ib_device.query_ah            = ehca_query_ah;
 432         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 433         shca->ib_device.create_qp           = ehca_create_qp;
 434         shca->ib_device.modify_qp           = ehca_modify_qp;
 435         shca->ib_device.query_qp            = ehca_query_qp;
 436         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 437         shca->ib_device.post_send           = ehca_post_send;
 438         shca->ib_device.post_recv           = ehca_post_recv;
 439         shca->ib_device.create_cq           = ehca_create_cq;
 440         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 441         shca->ib_device.resize_cq           = ehca_resize_cq;
 442         shca->ib_device.poll_cq             = ehca_poll_cq;
 443         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 444         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 445         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 446         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 447         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 448         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 449         shca->ib_device.query_mr            = ehca_query_mr;
 450         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 451         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 452         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 453         shca->ib_device.bind_mw             = ehca_bind_mw;
 454         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 455         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 456         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 457         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 458         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 459         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 460         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 461         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 462         shca->ib_device.mmap                = ehca_mmap;
 463
 464         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 465                 shca->ib_device.uverbs_cmd_mask |=
 466                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 467                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 468                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 469                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 470
 471                 shca->ib_device.create_srq          = ehca_create_srq;
 472                 shca->ib_device.modify_srq          = ehca_modify_srq;
 473                 shca->ib_device.query_srq           = ehca_query_srq;
 474                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 475                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 476         }
 477
 478         return ret;
 479 }
 480
 481 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 482 {
 483         struct ehca_sport *sport = &shca->sport[port - 1];
 484         struct ib_cq *ibcq;
 485         struct ib_qp *ibqp;
 486         struct ib_qp_init_attr qp_init_attr;
 487         int ret;
 488
 489         if (sport->ibcq_aqp1) {
 490                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 491                 return -EPERM;
 492         }
 493
 494         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 495         if (IS_ERR(ibcq)) {
 496                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 497                 return PTR_ERR(ibcq);
 498         }
 499         sport->ibcq_aqp1 = ibcq;
 500
 501         if (sport->ibqp_aqp1) {
 502                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 503                 ret = -EPERM;
 504                 goto create_aqp1;
 505         }
 506
 507         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 508         qp_init_attr.send_cq          = ibcq;
 509         qp_init_attr.recv_cq          = ibcq;
 510         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 511         qp_init_attr.cap.max_send_wr  = 100;
 512         qp_init_attr.cap.max_recv_wr  = 100;
 513         qp_init_attr.cap.max_send_sge = 2;
 514         qp_init_attr.cap.max_recv_sge = 1;
 515         qp_init_attr.qp_type          = IB_QPT_GSI;
 516         qp_init_attr.port_num         = port;
 517         qp_init_attr.qp_context       = NULL;
 518         qp_init_attr.event_handler    = NULL;
 519         qp_init_attr.srq              = NULL;
 520
 521         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 522         if (IS_ERR(ibqp)) {
 523                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 524                 ret = PTR_ERR(ibqp);
 525                 goto create_aqp1;
 526         }
 527         sport->ibqp_aqp1 = ibqp;
 528
 529         return 0;
 530
 531 create_aqp1:
 532         ib_destroy_cq(sport->ibcq_aqp1);
 533         return ret;
 534 }
 535
 536 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 537 {
 538         int ret;
 539
 540         ret = ib_destroy_qp(sport->ibqp_aqp1);
 541         if (ret) {
 542                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 543                 return ret;
 544         }
 545
 546         ret = ib_destroy_cq(sport->ibcq_aqp1);
 547         if (ret)
 548                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 549
 550         return ret;
 551 }
 552
 553 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 554 {
 555         return snprintf(buf, PAGE_SIZE, "%d\n",
 556                         ehca_debug_level);
 557 }
 558
 559 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 560                                       const char *buf, size_t count)
 561 {
 562         int value = (*buf) - '0';
 563         if (value >= 0 && value <= 9)
 564                 ehca_debug_level = value;
 565         return 1;
 566 }
 567
 568 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 569             ehca_show_debug_level, ehca_store_debug_level);
 570
 571 static struct attribute *ehca_drv_attrs[] = {
 572         &driver_attr_debug_level.attr,
 573         NULL
 574 };
 575
 576 static struct attribute_group ehca_drv_attr_grp = {
 577         .attrs = ehca_drv_attrs
 578 };
 579
 580 #define EHCA_RESOURCE_ATTR(name)                                           \
 581 static ssize_t  ehca_show_##name(struct device *dev,                       \
 582                                  struct device_attribute *attr,            \
 583                                  char *buf)                                \
 584 {                                                                          \
 585         struct ehca_shca *shca;                                            \
 586         struct hipz_query_hca *rblock;                                     \
 587         int data;                                                          \
 588                                                                            \
 589         shca = dev->driver_data;                                           \
 590                                                                            \
 591         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 592         if (!rblock) {                                                     \
 593                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 594                 return 0;                                                  \
 595         }                                                                  \
 596                                                                            \
 597         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 598                 dev_err(dev, "Can't query device properties\n");           \
 599                 ehca_free_fw_ctrlblock(rblock);                            \
 600                 return 0;                                                  \
 601         }                                                                  \
 602                                                                            \
 603         data = rblock->name;                                               \
 604         ehca_free_fw_ctrlblock(rblock);                                    \
 605                                                                            \
 606         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 607                 return snprintf(buf, 256, "1\n");                          \
 608         else                                                               \
 609                 return snprintf(buf, 256, "%d\n", data);                   \
 610                                                                            \
 611 }                                                                          \
 612 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 613
 614 EHCA_RESOURCE_ATTR(num_ports);
 615 EHCA_RESOURCE_ATTR(hw_ver);
 616 EHCA_RESOURCE_ATTR(max_eq);
 617 EHCA_RESOURCE_ATTR(cur_eq);
 618 EHCA_RESOURCE_ATTR(max_cq);
 619 EHCA_RESOURCE_ATTR(cur_cq);
 620 EHCA_RESOURCE_ATTR(max_qp);
 621 EHCA_RESOURCE_ATTR(cur_qp);
 622 EHCA_RESOURCE_ATTR(max_mr);
 623 EHCA_RESOURCE_ATTR(cur_mr);
 624 EHCA_RESOURCE_ATTR(max_mw);
 625 EHCA_RESOURCE_ATTR(cur_mw);
 626 EHCA_RESOURCE_ATTR(max_pd);
 627 EHCA_RESOURCE_ATTR(max_ah);
 628
 629 static ssize_t ehca_show_adapter_handle(struct device *dev,
 630                                         struct device_attribute *attr,
 631                                         char *buf)
 632 {
 633         struct ehca_shca *shca = dev->driver_data;
 634
 635         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 636
 637 }
 638 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 639
 640 static ssize_t ehca_show_mr_largepage(struct device *dev,
 641                                       struct device_attribute *attr,
 642                                       char *buf)
 643 {
 644         return sprintf(buf, "%d\n", ehca_mr_largepage);
 645 }
 646 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
 647
 648 static struct attribute *ehca_dev_attrs[] = {
 649         &dev_attr_adapter_handle.attr,
 650         &dev_attr_num_ports.attr,
 651         &dev_attr_hw_ver.attr,
 652         &dev_attr_max_eq.attr,
 653         &dev_attr_cur_eq.attr,
 654         &dev_attr_max_cq.attr,
 655         &dev_attr_cur_cq.attr,
 656         &dev_attr_max_qp.attr,
 657         &dev_attr_cur_qp.attr,
 658         &dev_attr_max_mr.attr,
 659         &dev_attr_cur_mr.attr,
 660         &dev_attr_max_mw.attr,
 661         &dev_attr_cur_mw.attr,
 662         &dev_attr_max_pd.attr,
 663         &dev_attr_max_ah.attr,
 664         &dev_attr_mr_largepage.attr,
 665         NULL
 666 };
 667
 668 static struct attribute_group ehca_dev_attr_grp = {
 669         .attrs = ehca_dev_attrs
 670 };
 671
 672 static int __devinit ehca_probe(struct of_device *dev,
 673                                 const struct of_device_id *id)
 674 {
 675         struct ehca_shca *shca;
 676         const u64 *handle;
 677         struct ib_pd *ibpd;
 678         int ret;
 679
 680         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 681         if (!handle) {
 682                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 683                              dev->node->full_name);
 684                 return -ENODEV;
 685         }
 686
 687         if (!(*handle)) {
 688                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 689                              dev->node->full_name);
 690                 return -ENODEV;
 691         }
 692
 693         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 694         if (!shca) {
 695                 ehca_gen_err("Cannot allocate shca memory.");
 696                 return -ENOMEM;
 697         }
 698         mutex_init(&shca->modify_mutex);
 699
 700         shca->ofdev = dev;
 701         shca->ipz_hca_handle.handle = *handle;
 702         dev->dev.driver_data = shca;
 703
 704         ret = ehca_sense_attributes(shca);
 705         if (ret < 0) {
 706                 ehca_gen_err("Cannot sense eHCA attributes.");
 707                 goto probe1;
 708         }
 709
 710         ret = ehca_init_device(shca);
 711         if (ret) {
 712                 ehca_gen_err("Cannot init ehca  device struct");
 713                 goto probe1;
 714         }
 715
 716         /* create event queues */
 717         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 718         if (ret) {
 719                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 720                 goto probe1;
 721         }
 722
 723         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 724         if (ret) {
 725                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 726                 goto probe3;
 727         }
 728
 729         /* create internal protection domain */
 730         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 731         if (IS_ERR(ibpd)) {
 732                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 733                 ret = PTR_ERR(ibpd);
 734                 goto probe4;
 735         }
 736
 737         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 738         shca->pd->ib_pd.device = &shca->ib_device;
 739
 740         /* create internal max MR */
 741         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 742
 743         if (ret) {
 744                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 745                          ret);
 746                 goto probe5;
 747         }
 748
 749         ret = ib_register_device(&shca->ib_device);
 750         if (ret) {
 751                 ehca_err(&shca->ib_device,
 752                          "ib_register_device() failed ret=%i", ret);
 753                 goto probe6;
 754         }
 755
 756         /* create AQP1 for port 1 */
 757         if (ehca_open_aqp1 == 1) {
 758                 shca->sport[0].port_state = IB_PORT_DOWN;
 759                 ret = ehca_create_aqp1(shca, 1);
 760                 if (ret) {
 761                         ehca_err(&shca->ib_device,
 762                                  "Cannot create AQP1 for port 1.");
 763                         goto probe7;
 764                 }
 765         }
 766
 767         /* create AQP1 for port 2 */
 768         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 769                 shca->sport[1].port_state = IB_PORT_DOWN;
 770                 ret = ehca_create_aqp1(shca, 2);
 771                 if (ret) {
 772                         ehca_err(&shca->ib_device,
 773                                  "Cannot create AQP1 for port 2.");
 774                         goto probe8;
 775                 }
 776         }
 777
 778         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 779         if (ret) /* only complain; we can live without attributes */
 780                 ehca_err(&shca->ib_device,
 781                          "Cannot create device attributes  ret=%d", ret);
 782
 783         spin_lock(&shca_list_lock);
 784         list_add(&shca->shca_list, &shca_list);
 785         spin_unlock(&shca_list_lock);
 786
 787         return 0;
 788
 789 probe8:
 790         ret = ehca_destroy_aqp1(&shca->sport[0]);
 791         if (ret)
 792                 ehca_err(&shca->ib_device,
 793                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 794
 795 probe7:
 796         ib_unregister_device(&shca->ib_device);
 797
 798 probe6:
 799         ret = ehca_dereg_internal_maxmr(shca);
 800         if (ret)
 801                 ehca_err(&shca->ib_device,
 802                          "Cannot destroy internal MR. ret=%x", ret);
 803
 804 probe5:
 805         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 806         if (ret)
 807                 ehca_err(&shca->ib_device,
 808                          "Cannot destroy internal PD. ret=%x", ret);
 809
 810 probe4:
 811         ret = ehca_destroy_eq(shca, &shca->neq);
 812         if (ret)
 813                 ehca_err(&shca->ib_device,
 814                          "Cannot destroy NEQ. ret=%x", ret);
 815
 816 probe3:
 817         ret = ehca_destroy_eq(shca, &shca->eq);
 818         if (ret)
 819                 ehca_err(&shca->ib_device,
 820                          "Cannot destroy EQ. ret=%x", ret);
 821
 822 probe1:
 823         ib_dealloc_device(&shca->ib_device);
 824
 825         return -EINVAL;
 826 }
 827
 828 static int __devexit ehca_remove(struct of_device *dev)
 829 {
 830         struct ehca_shca *shca = dev->dev.driver_data;
 831         int ret;
 832
 833         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 834
 835         if (ehca_open_aqp1 == 1) {
 836                 int i;
 837                 for (i = 0; i < shca->num_ports; i++) {
 838                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 839                         if (ret)
 840                                 ehca_err(&shca->ib_device,
 841                                          "Cannot destroy AQP1 for port %x "
 842                                          "ret=%i", ret, i);
 843                 }
 844         }
 845
 846         ib_unregister_device(&shca->ib_device);
 847
 848         ret = ehca_dereg_internal_maxmr(shca);
 849         if (ret)
 850                 ehca_err(&shca->ib_device,
 851                          "Cannot destroy internal MR. ret=%i", ret);
 852
 853         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 854         if (ret)
 855                 ehca_err(&shca->ib_device,
 856                          "Cannot destroy internal PD. ret=%i", ret);
 857
 858         ret = ehca_destroy_eq(shca, &shca->eq);
 859         if (ret)
 860                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 861
 862         ret = ehca_destroy_eq(shca, &shca->neq);
 863         if (ret)
 864                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 865
 866         ib_dealloc_device(&shca->ib_device);
 867
 868         spin_lock(&shca_list_lock);
 869         list_del(&shca->shca_list);
 870         spin_unlock(&shca_list_lock);
 871
 872         return ret;
 873 }
 874
 875 static struct of_device_id ehca_device_table[] =
 876 {
 877         {
 878                 .name       = "lhca",
 879                 .compatible = "IBM,lhca",
 880         },
 881         {},
 882 };
 883
 884 static struct of_platform_driver ehca_driver = {
 885         .name        = "ehca",
 886         .match_table = ehca_device_table,
 887         .probe       = ehca_probe,
 888         .remove      = ehca_remove,
 889 };
 890
 891 void ehca_poll_eqs(unsigned long data)
 892 {
 893         struct ehca_shca *shca;
 894
 895         spin_lock(&shca_list_lock);
 896         list_for_each_entry(shca, &shca_list, shca_list) {
 897                 if (shca->eq.is_initialized) {
 898                         /* call deadman proc only if eq ptr does not change */
 899                         struct ehca_eq *eq = &shca->eq;
 900                         int max = 3;
 901                         volatile u64 q_ofs, q_ofs2;
 902                         u64 flags;
 903                         spin_lock_irqsave(&eq->spinlock, flags);
 904                         q_ofs = eq->ipz_queue.current_q_offset;
 905                         spin_unlock_irqrestore(&eq->spinlock, flags);
 906                         do {
 907                                 spin_lock_irqsave(&eq->spinlock, flags);
 908                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 909                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 910                                 max--;
 911                         } while (q_ofs == q_ofs2 && max > 0);
 912                         if (q_ofs == q_ofs2)
 913                                 ehca_process_eq(shca, 0);
 914                 }
 915         }
 916         mod_timer(&poll_eqs_timer, jiffies + HZ);
 917         spin_unlock(&shca_list_lock);
 918 }
 919
 920 int __init ehca_module_init(void)
 921 {
 922         int ret;
 923
 924         printk(KERN_INFO "eHCA Infiniband Device Driver "
 925                "(Version " HCAD_VERSION ")\n");
 926
 927         ret = ehca_create_comp_pool();
 928         if (ret) {
 929                 ehca_gen_err("Cannot create comp pool.");
 930                 return ret;
 931         }
 932
 933         ret = ehca_create_slab_caches();
 934         if (ret) {
 935                 ehca_gen_err("Cannot create SLAB caches");
 936                 ret = -ENOMEM;
 937                 goto module_init1;
 938         }
 939
 940         ret = ibmebus_register_driver(&ehca_driver);
 941         if (ret) {
 942                 ehca_gen_err("Cannot register eHCA device driver");
 943                 ret = -EINVAL;
 944                 goto module_init2;
 945         }
 946
 947         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 948         if (ret) /* only complain; we can live without attributes */
 949                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 950
 951         if (ehca_poll_all_eqs != 1) {
 952                 ehca_gen_err("WARNING!!!");
 953                 ehca_gen_err("It is possible to lose interrupts.");
 954         } else {
 955                 init_timer(&poll_eqs_timer);
 956                 poll_eqs_timer.function = ehca_poll_eqs;
 957                 poll_eqs_timer.expires = jiffies + HZ;
 958                 add_timer(&poll_eqs_timer);
 959         }
 960
 961         return 0;
 962
 963 module_init2:
 964         ehca_destroy_slab_caches();
 965
 966 module_init1:
 967         ehca_destroy_comp_pool();
 968         return ret;
 969 };
 970
 971 void __exit ehca_module_exit(void)
 972 {
 973         if (ehca_poll_all_eqs == 1)
 974                 del_timer_sync(&poll_eqs_timer);
 975
 976         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 977         ibmebus_unregister_driver(&ehca_driver);
 978
 979         ehca_destroy_slab_caches();
 980
 981         ehca_destroy_comp_pool();
 982
 983         idr_destroy(&ehca_cq_idr);
 984         idr_destroy(&ehca_qp_idr);
 985 };
 986
 987 module_init(ehca_module_init);
 988 module_exit(ehca_module_exit);