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