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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 "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 "0026"
  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 static int ehca_open_aqp1     = 0;
  61 static int ehca_hw_level      = 0;
  62 static int ehca_poll_all_eqs  = 1;
  63
  64 int ehca_debug_level   = 0;
  65 int ehca_nr_ports      = 2;
  66 int ehca_use_hp_mr     = 0;
  67 int ehca_port_act_time = 30;
  68 int ehca_static_rate   = -1;
  69 int ehca_scaling_code  = 0;
  70 int ehca_lock_hcalls   = -1;
  71
  72 module_param_named(open_aqp1,     ehca_open_aqp1,     bool, 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,     bool, 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,  bool, S_IRUGO);
  79 module_param_named(static_rate,   ehca_static_rate,   int,  S_IRUGO);
  80 module_param_named(scaling_code,  ehca_scaling_code,  bool, S_IRUGO);
  81 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
  82
  83 MODULE_PARM_DESC(open_aqp1,
  84                  "Open AQP1 on startup (default: no)");
  85 MODULE_PARM_DESC(debug_level,
  86                  "Amount of debug output (0: none (default), 1: traces, "
  87                  "2: some dumps, 3: lots)");
  88 MODULE_PARM_DESC(hw_level,
  89                  "Hardware level (0: autosensing (default), "
  90                  "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
  91 MODULE_PARM_DESC(nr_ports,
  92                  "number of connected ports (-1: autodetect, 1: port one only, "
  93                  "2: two ports (default)");
  94 MODULE_PARM_DESC(use_hp_mr,
  95                  "Use high performance MRs (default: no)");
  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                  "Poll all event queues periodically (default: yes)");
 100 MODULE_PARM_DESC(static_rate,
 101                  "Set permanent static rate (default: no static rate)");
 102 MODULE_PARM_DESC(scaling_code,
 103                  "Enable scaling code (default: no)");
 104 MODULE_PARM_DESC(lock_hcalls,
 105                  "Serialize all hCalls made by the driver "
 106                  "(default: autodetect)");
 107
 108 DEFINE_RWLOCK(ehca_qp_idr_lock);
 109 DEFINE_RWLOCK(ehca_cq_idr_lock);
 110 DEFINE_IDR(ehca_qp_idr);
 111 DEFINE_IDR(ehca_cq_idr);
 112
 113 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 114 static DEFINE_SPINLOCK(shca_list_lock);
 115
 116 static struct timer_list poll_eqs_timer;
 117
 118 #ifdef CONFIG_PPC_64K_PAGES
 119 static struct kmem_cache *ctblk_cache;
 120
 121 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 122 {
 123         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 124         if (!ret)
 125                 ehca_gen_err("Out of memory for ctblk");
 126         return ret;
 127 }
 128
 129 void ehca_free_fw_ctrlblock(void *ptr)
 130 {
 131         if (ptr)
 132                 kmem_cache_free(ctblk_cache, ptr);
 133
 134 }
 135 #endif
 136
 137 int ehca2ib_return_code(u64 ehca_rc)
 138 {
 139         switch (ehca_rc) {
 140         case H_SUCCESS:
 141                 return 0;
 142         case H_RESOURCE:             /* Resource in use */
 143         case H_BUSY:
 144                 return -EBUSY;
 145         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 146         case H_CONSTRAINED:          /* resource constraint */
 147         case H_NO_MEM:
 148                 return -ENOMEM;
 149         default:
 150                 return -EINVAL;
 151         }
 152 }
 153
 154 static int ehca_create_slab_caches(void)
 155 {
 156         int ret;
 157
 158         ret = ehca_init_pd_cache();
 159         if (ret) {
 160                 ehca_gen_err("Cannot create PD SLAB cache.");
 161                 return ret;
 162         }
 163
 164         ret = ehca_init_cq_cache();
 165         if (ret) {
 166                 ehca_gen_err("Cannot create CQ SLAB cache.");
 167                 goto create_slab_caches2;
 168         }
 169
 170         ret = ehca_init_qp_cache();
 171         if (ret) {
 172                 ehca_gen_err("Cannot create QP SLAB cache.");
 173                 goto create_slab_caches3;
 174         }
 175
 176         ret = ehca_init_av_cache();
 177         if (ret) {
 178                 ehca_gen_err("Cannot create AV SLAB cache.");
 179                 goto create_slab_caches4;
 180         }
 181
 182         ret = ehca_init_mrmw_cache();
 183         if (ret) {
 184                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 185                 goto create_slab_caches5;
 186         }
 187
 188         ret = ehca_init_small_qp_cache();
 189         if (ret) {
 190                 ehca_gen_err("Cannot create small queue SLAB cache.");
 191                 goto create_slab_caches6;
 192         }
 193
 194 #ifdef CONFIG_PPC_64K_PAGES
 195         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 196                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 197                                         SLAB_HWCACHE_ALIGN,
 198                                         NULL);
 199         if (!ctblk_cache) {
 200                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 201                 ehca_cleanup_small_qp_cache();
 202                 goto create_slab_caches6;
 203         }
 204 #endif
 205         return 0;
 206
 207 create_slab_caches6:
 208         ehca_cleanup_mrmw_cache();
 209
 210 create_slab_caches5:
 211         ehca_cleanup_av_cache();
 212
 213 create_slab_caches4:
 214         ehca_cleanup_qp_cache();
 215
 216 create_slab_caches3:
 217         ehca_cleanup_cq_cache();
 218
 219 create_slab_caches2:
 220         ehca_cleanup_pd_cache();
 221
 222         return ret;
 223 }
 224
 225 static void ehca_destroy_slab_caches(void)
 226 {
 227         ehca_cleanup_small_qp_cache();
 228         ehca_cleanup_mrmw_cache();
 229         ehca_cleanup_av_cache();
 230         ehca_cleanup_qp_cache();
 231         ehca_cleanup_cq_cache();
 232         ehca_cleanup_pd_cache();
 233 #ifdef CONFIG_PPC_64K_PAGES
 234         if (ctblk_cache)
 235                 kmem_cache_destroy(ctblk_cache);
 236 #endif
 237 }
 238
 239 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 240 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 241
 242 static struct cap_descr {
 243         u64 mask;
 244         char *descr;
 245 } hca_cap_descr[] = {
 246         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 247         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 248         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 249         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 250         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 251         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 252         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 253         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 254         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 255         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 256         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 257         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 258         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 259         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 260         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 261         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 262         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 263         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 264 };
 265
 266 static int ehca_sense_attributes(struct ehca_shca *shca)
 267 {
 268         int i, ret = 0;
 269         u64 h_ret;
 270         struct hipz_query_hca *rblock;
 271         struct hipz_query_port *port;
 272         const char *loc_code;
 273
 274         static const u32 pgsize_map[] = {
 275                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 276                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 277                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 278                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 279         };
 280
 281         ehca_gen_dbg("Probing adapter %s...",
 282                      shca->ofdev->node->full_name);
 283         loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
 284         if (loc_code)
 285                 ehca_gen_dbg(" ... location lode=%s", loc_code);
 286
 287         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 288         if (!rblock) {
 289                 ehca_gen_err("Cannot allocate rblock memory.");
 290                 return -ENOMEM;
 291         }
 292
 293         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 294         if (h_ret != H_SUCCESS) {
 295                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 296                              h_ret);
 297                 ret = -EPERM;
 298                 goto sense_attributes1;
 299         }
 300
 301         if (ehca_nr_ports == 1)
 302                 shca->num_ports = 1;
 303         else
 304                 shca->num_ports = (u8)rblock->num_ports;
 305
 306         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 307
 308         if (ehca_hw_level == 0) {
 309                 u32 hcaaver;
 310                 u32 revid;
 311
 312                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 313                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 314
 315                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 316
 317                 if (hcaaver == 1) {
 318                         if (revid <= 3)
 319                                 shca->hw_level = 0x10 | (revid + 1);
 320                         else
 321                                 shca->hw_level = 0x14;
 322                 } else if (hcaaver == 2) {
 323                         if (revid == 0)
 324                                 shca->hw_level = 0x21;
 325                         else if (revid == 0x10)
 326                                 shca->hw_level = 0x22;
 327                         else if (revid == 0x20 || revid == 0x21)
 328                                 shca->hw_level = 0x23;
 329                 }
 330
 331                 if (!shca->hw_level) {
 332                         ehca_gen_warn("unknown hardware version"
 333                                       " - assuming default level");
 334                         shca->hw_level = 0x22;
 335                 }
 336         } else
 337                 shca->hw_level = ehca_hw_level;
 338         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 339
 340         shca->hca_cap = rblock->hca_cap_indicators;
 341         ehca_gen_dbg(" ... HCA capabilities:");
 342         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 343                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 344                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 345
 346         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 347          * a firmware property, so it's valid across all adapters
 348          */
 349         if (ehca_lock_hcalls == -1)
 350                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
 351
 352         /* translate supported MR page sizes; always support 4K */
 353         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 354         for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 355                 if (rblock->memory_page_size_supported & pgsize_map[i])
 356                         shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 357
 358         /* query max MTU from first port -- it's the same for all ports */
 359         port = (struct hipz_query_port *)rblock;
 360         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 361         if (h_ret != H_SUCCESS) {
 362                 ehca_gen_err("Cannot query port properties. h_ret=%li",
 363                              h_ret);
 364                 ret = -EPERM;
 365                 goto sense_attributes1;
 366         }
 367
 368         shca->max_mtu = port->max_mtu;
 369
 370 sense_attributes1:
 371         ehca_free_fw_ctrlblock(rblock);
 372         return ret;
 373 }
 374
 375 static int init_node_guid(struct ehca_shca *shca)
 376 {
 377         int ret = 0;
 378         struct hipz_query_hca *rblock;
 379
 380         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 381         if (!rblock) {
 382                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 383                 return -ENOMEM;
 384         }
 385
 386         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 387                 ehca_err(&shca->ib_device, "Can't query device properties");
 388                 ret = -EINVAL;
 389                 goto init_node_guid1;
 390         }
 391
 392         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 393
 394 init_node_guid1:
 395         ehca_free_fw_ctrlblock(rblock);
 396         return ret;
 397 }
 398
 399 static int ehca_init_device(struct ehca_shca *shca)
 400 {
 401         int ret;
 402
 403         ret = init_node_guid(shca);
 404         if (ret)
 405                 return ret;
 406
 407         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 408         shca->ib_device.owner               = THIS_MODULE;
 409
 410         shca->ib_device.uverbs_abi_ver      = 8;
 411         shca->ib_device.uverbs_cmd_mask     =
 412                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 413                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 414                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 415                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 416                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 417                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 418                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 419                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 420                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 421                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 422                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 423                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 424                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 425                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 426                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 427                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 428
 429         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 430         shca->ib_device.phys_port_cnt       = shca->num_ports;
 431         shca->ib_device.num_comp_vectors    = 1;
 432         shca->ib_device.dma_device          = &shca->ofdev->dev;
 433         shca->ib_device.query_device        = ehca_query_device;
 434         shca->ib_device.query_port          = ehca_query_port;
 435         shca->ib_device.query_gid           = ehca_query_gid;
 436         shca->ib_device.query_pkey          = ehca_query_pkey;
 437         /* shca->in_device.modify_device    = ehca_modify_device    */
 438         shca->ib_device.modify_port         = ehca_modify_port;
 439         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 440         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 441         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 442         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 443         shca->ib_device.create_ah           = ehca_create_ah;
 444         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 445         shca->ib_device.query_ah            = ehca_query_ah;
 446         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 447         shca->ib_device.create_qp           = ehca_create_qp;
 448         shca->ib_device.modify_qp           = ehca_modify_qp;
 449         shca->ib_device.query_qp            = ehca_query_qp;
 450         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 451         shca->ib_device.post_send           = ehca_post_send;
 452         shca->ib_device.post_recv           = ehca_post_recv;
 453         shca->ib_device.create_cq           = ehca_create_cq;
 454         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 455         shca->ib_device.resize_cq           = ehca_resize_cq;
 456         shca->ib_device.poll_cq             = ehca_poll_cq;
 457         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 458         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 459         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 460         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 461         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 462         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 463         shca->ib_device.query_mr            = ehca_query_mr;
 464         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 465         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 466         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 467         shca->ib_device.bind_mw             = ehca_bind_mw;
 468         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 469         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 470         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 471         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 472         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 473         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 474         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 475         shca->ib_device.process_mad         = ehca_process_mad;
 476         shca->ib_device.mmap                = ehca_mmap;
 477
 478         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 479                 shca->ib_device.uverbs_cmd_mask |=
 480                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 481                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 482                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 483                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 484
 485                 shca->ib_device.create_srq          = ehca_create_srq;
 486                 shca->ib_device.modify_srq          = ehca_modify_srq;
 487                 shca->ib_device.query_srq           = ehca_query_srq;
 488                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 489                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 490         }
 491
 492         return ret;
 493 }
 494
 495 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 496 {
 497         struct ehca_sport *sport = &shca->sport[port - 1];
 498         struct ib_cq *ibcq;
 499         struct ib_qp *ibqp;
 500         struct ib_qp_init_attr qp_init_attr;
 501         int ret;
 502
 503         if (sport->ibcq_aqp1) {
 504                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 505                 return -EPERM;
 506         }
 507
 508         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 509         if (IS_ERR(ibcq)) {
 510                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 511                 return PTR_ERR(ibcq);
 512         }
 513         sport->ibcq_aqp1 = ibcq;
 514
 515         if (sport->ibqp_sqp[IB_QPT_GSI]) {
 516                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 517                 ret = -EPERM;
 518                 goto create_aqp1;
 519         }
 520
 521         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 522         qp_init_attr.send_cq          = ibcq;
 523         qp_init_attr.recv_cq          = ibcq;
 524         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 525         qp_init_attr.cap.max_send_wr  = 100;
 526         qp_init_attr.cap.max_recv_wr  = 100;
 527         qp_init_attr.cap.max_send_sge = 2;
 528         qp_init_attr.cap.max_recv_sge = 1;
 529         qp_init_attr.qp_type          = IB_QPT_GSI;
 530         qp_init_attr.port_num         = port;
 531         qp_init_attr.qp_context       = NULL;
 532         qp_init_attr.event_handler    = NULL;
 533         qp_init_attr.srq              = NULL;
 534
 535         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 536         if (IS_ERR(ibqp)) {
 537                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 538                 ret = PTR_ERR(ibqp);
 539                 goto create_aqp1;
 540         }
 541         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
 542
 543         return 0;
 544
 545 create_aqp1:
 546         ib_destroy_cq(sport->ibcq_aqp1);
 547         return ret;
 548 }
 549
 550 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 551 {
 552         int ret;
 553
 554         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
 555         if (ret) {
 556                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 557                 return ret;
 558         }
 559
 560         ret = ib_destroy_cq(sport->ibcq_aqp1);
 561         if (ret)
 562                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 563
 564         return ret;
 565 }
 566
 567 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 568 {
 569         return snprintf(buf, PAGE_SIZE, "%d\n", 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 static 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 struct attribute *ehca_dev_attrs[] = {
 659         &dev_attr_adapter_handle.attr,
 660         &dev_attr_num_ports.attr,
 661         &dev_attr_hw_ver.attr,
 662         &dev_attr_max_eq.attr,
 663         &dev_attr_cur_eq.attr,
 664         &dev_attr_max_cq.attr,
 665         &dev_attr_cur_cq.attr,
 666         &dev_attr_max_qp.attr,
 667         &dev_attr_cur_qp.attr,
 668         &dev_attr_max_mr.attr,
 669         &dev_attr_cur_mr.attr,
 670         &dev_attr_max_mw.attr,
 671         &dev_attr_cur_mw.attr,
 672         &dev_attr_max_pd.attr,
 673         &dev_attr_max_ah.attr,
 674         NULL
 675 };
 676
 677 static struct attribute_group ehca_dev_attr_grp = {
 678         .attrs = ehca_dev_attrs
 679 };
 680
 681 static int __devinit ehca_probe(struct of_device *dev,
 682                                 const struct of_device_id *id)
 683 {
 684         struct ehca_shca *shca;
 685         const u64 *handle;
 686         struct ib_pd *ibpd;
 687         int ret, i;
 688
 689         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 690         if (!handle) {
 691                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 692                              dev->node->full_name);
 693                 return -ENODEV;
 694         }
 695
 696         if (!(*handle)) {
 697                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 698                              dev->node->full_name);
 699                 return -ENODEV;
 700         }
 701
 702         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 703         if (!shca) {
 704                 ehca_gen_err("Cannot allocate shca memory.");
 705                 return -ENOMEM;
 706         }
 707         mutex_init(&shca->modify_mutex);
 708         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 709                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
 710
 711         shca->ofdev = dev;
 712         shca->ipz_hca_handle.handle = *handle;
 713         dev->dev.driver_data = shca;
 714
 715         ret = ehca_sense_attributes(shca);
 716         if (ret < 0) {
 717                 ehca_gen_err("Cannot sense eHCA attributes.");
 718                 goto probe1;
 719         }
 720
 721         ret = ehca_init_device(shca);
 722         if (ret) {
 723                 ehca_gen_err("Cannot init ehca  device struct");
 724                 goto probe1;
 725         }
 726
 727         /* create event queues */
 728         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 729         if (ret) {
 730                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 731                 goto probe1;
 732         }
 733
 734         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 735         if (ret) {
 736                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 737                 goto probe3;
 738         }
 739
 740         /* create internal protection domain */
 741         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 742         if (IS_ERR(ibpd)) {
 743                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 744                 ret = PTR_ERR(ibpd);
 745                 goto probe4;
 746         }
 747
 748         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 749         shca->pd->ib_pd.device = &shca->ib_device;
 750
 751         /* create internal max MR */
 752         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 753
 754         if (ret) {
 755                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 756                          ret);
 757                 goto probe5;
 758         }
 759
 760         ret = ib_register_device(&shca->ib_device);
 761         if (ret) {
 762                 ehca_err(&shca->ib_device,
 763                          "ib_register_device() failed ret=%i", ret);
 764                 goto probe6;
 765         }
 766
 767         /* create AQP1 for port 1 */
 768         if (ehca_open_aqp1 == 1) {
 769                 shca->sport[0].port_state = IB_PORT_DOWN;
 770                 ret = ehca_create_aqp1(shca, 1);
 771                 if (ret) {
 772                         ehca_err(&shca->ib_device,
 773                                  "Cannot create AQP1 for port 1.");
 774                         goto probe7;
 775                 }
 776         }
 777
 778         /* create AQP1 for port 2 */
 779         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 780                 shca->sport[1].port_state = IB_PORT_DOWN;
 781                 ret = ehca_create_aqp1(shca, 2);
 782                 if (ret) {
 783                         ehca_err(&shca->ib_device,
 784                                  "Cannot create AQP1 for port 2.");
 785                         goto probe8;
 786                 }
 787         }
 788
 789         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 790         if (ret) /* only complain; we can live without attributes */
 791                 ehca_err(&shca->ib_device,
 792                          "Cannot create device attributes  ret=%d", ret);
 793
 794         spin_lock(&shca_list_lock);
 795         list_add(&shca->shca_list, &shca_list);
 796         spin_unlock(&shca_list_lock);
 797
 798         return 0;
 799
 800 probe8:
 801         ret = ehca_destroy_aqp1(&shca->sport[0]);
 802         if (ret)
 803                 ehca_err(&shca->ib_device,
 804                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 805
 806 probe7:
 807         ib_unregister_device(&shca->ib_device);
 808
 809 probe6:
 810         ret = ehca_dereg_internal_maxmr(shca);
 811         if (ret)
 812                 ehca_err(&shca->ib_device,
 813                          "Cannot destroy internal MR. ret=%x", ret);
 814
 815 probe5:
 816         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 817         if (ret)
 818                 ehca_err(&shca->ib_device,
 819                          "Cannot destroy internal PD. ret=%x", ret);
 820
 821 probe4:
 822         ret = ehca_destroy_eq(shca, &shca->neq);
 823         if (ret)
 824                 ehca_err(&shca->ib_device,
 825                          "Cannot destroy NEQ. ret=%x", ret);
 826
 827 probe3:
 828         ret = ehca_destroy_eq(shca, &shca->eq);
 829         if (ret)
 830                 ehca_err(&shca->ib_device,
 831                          "Cannot destroy EQ. ret=%x", ret);
 832
 833 probe1:
 834         ib_dealloc_device(&shca->ib_device);
 835
 836         return -EINVAL;
 837 }
 838
 839 static int __devexit ehca_remove(struct of_device *dev)
 840 {
 841         struct ehca_shca *shca = dev->dev.driver_data;
 842         int ret;
 843
 844         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 845
 846         if (ehca_open_aqp1 == 1) {
 847                 int i;
 848                 for (i = 0; i < shca->num_ports; i++) {
 849                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 850                         if (ret)
 851                                 ehca_err(&shca->ib_device,
 852                                          "Cannot destroy AQP1 for port %x "
 853                                          "ret=%i", ret, i);
 854                 }
 855         }
 856
 857         ib_unregister_device(&shca->ib_device);
 858
 859         ret = ehca_dereg_internal_maxmr(shca);
 860         if (ret)
 861                 ehca_err(&shca->ib_device,
 862                          "Cannot destroy internal MR. ret=%i", ret);
 863
 864         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 865         if (ret)
 866                 ehca_err(&shca->ib_device,
 867                          "Cannot destroy internal PD. ret=%i", ret);
 868
 869         ret = ehca_destroy_eq(shca, &shca->eq);
 870         if (ret)
 871                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 872
 873         ret = ehca_destroy_eq(shca, &shca->neq);
 874         if (ret)
 875                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 876
 877         ib_dealloc_device(&shca->ib_device);
 878
 879         spin_lock(&shca_list_lock);
 880         list_del(&shca->shca_list);
 881         spin_unlock(&shca_list_lock);
 882
 883         return ret;
 884 }
 885
 886 static struct of_device_id ehca_device_table[] =
 887 {
 888         {
 889                 .name       = "lhca",
 890                 .compatible = "IBM,lhca",
 891         },
 892         {},
 893 };
 894
 895 static struct of_platform_driver ehca_driver = {
 896         .name        = "ehca",
 897         .match_table = ehca_device_table,
 898         .probe       = ehca_probe,
 899         .remove      = ehca_remove,
 900         .driver      = {
 901                 .groups = ehca_drv_attr_groups,
 902         },
 903 };
 904
 905 void ehca_poll_eqs(unsigned long data)
 906 {
 907         struct ehca_shca *shca;
 908
 909         spin_lock(&shca_list_lock);
 910         list_for_each_entry(shca, &shca_list, shca_list) {
 911                 if (shca->eq.is_initialized) {
 912                         /* call deadman proc only if eq ptr does not change */
 913                         struct ehca_eq *eq = &shca->eq;
 914                         int max = 3;
 915                         volatile u64 q_ofs, q_ofs2;
 916                         u64 flags;
 917                         spin_lock_irqsave(&eq->spinlock, flags);
 918                         q_ofs = eq->ipz_queue.current_q_offset;
 919                         spin_unlock_irqrestore(&eq->spinlock, flags);
 920                         do {
 921                                 spin_lock_irqsave(&eq->spinlock, flags);
 922                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 923                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 924                                 max--;
 925                         } while (q_ofs == q_ofs2 && max > 0);
 926                         if (q_ofs == q_ofs2)
 927                                 ehca_process_eq(shca, 0);
 928                 }
 929         }
 930         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
 931         spin_unlock(&shca_list_lock);
 932 }
 933
 934 static int __init ehca_module_init(void)
 935 {
 936         int ret;
 937
 938         printk(KERN_INFO "eHCA Infiniband Device Driver "
 939                "(Version " HCAD_VERSION ")\n");
 940
 941         ret = ehca_create_comp_pool();
 942         if (ret) {
 943                 ehca_gen_err("Cannot create comp pool.");
 944                 return ret;
 945         }
 946
 947         ret = ehca_create_slab_caches();
 948         if (ret) {
 949                 ehca_gen_err("Cannot create SLAB caches");
 950                 ret = -ENOMEM;
 951                 goto module_init1;
 952         }
 953
 954         ret = ibmebus_register_driver(&ehca_driver);
 955         if (ret) {
 956                 ehca_gen_err("Cannot register eHCA device driver");
 957                 ret = -EINVAL;
 958                 goto module_init2;
 959         }
 960
 961         if (ehca_poll_all_eqs != 1) {
 962                 ehca_gen_err("WARNING!!!");
 963                 ehca_gen_err("It is possible to lose interrupts.");
 964         } else {
 965                 init_timer(&poll_eqs_timer);
 966                 poll_eqs_timer.function = ehca_poll_eqs;
 967                 poll_eqs_timer.expires = jiffies + HZ;
 968                 add_timer(&poll_eqs_timer);
 969         }
 970
 971         return 0;
 972
 973 module_init2:
 974         ehca_destroy_slab_caches();
 975
 976 module_init1:
 977         ehca_destroy_comp_pool();
 978         return ret;
 979 };
 980
 981 static void __exit ehca_module_exit(void)
 982 {
 983         if (ehca_poll_all_eqs == 1)
 984                 del_timer_sync(&poll_eqs_timer);
 985
 986         ibmebus_unregister_driver(&ehca_driver);
 987
 988         ehca_destroy_slab_caches();
 989
 990         ehca_destroy_comp_pool();
 991
 992         idr_destroy(&ehca_cq_idr);
 993         idr_destroy(&ehca_qp_idr);
 994 };
 995
 996 module_init(ehca_module_init);
 997 module_exit(ehca_module_exit);