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 static int ehca_mr_largepage  = 1;
  64
  65 int ehca_debug_level   = 0;
  66 int ehca_nr_ports      = 2;
  67 int ehca_use_hp_mr     = 0;
  68 int ehca_port_act_time = 30;
  69 int ehca_static_rate   = -1;
  70 int ehca_scaling_code  = 0;
  71 int ehca_lock_hcalls   = -1;
  72
  73 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
  74 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
  75 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
  76 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
  77 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
  78 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
  79 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
  80 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
  81 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
  82 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
  83 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
  84
  85 MODULE_PARM_DESC(open_aqp1,
  86                  "AQP1 on startup (0: no (default), 1: yes)");
  87 MODULE_PARM_DESC(debug_level,
  88                  "debug level"
  89                  " (0: no debug traces (default), 1: with debug traces)");
  90 MODULE_PARM_DESC(hw_level,
  91                  "hardware level"
  92                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  93 MODULE_PARM_DESC(nr_ports,
  94                  "number of connected ports (-1: autodetect, 1: port one only, "
  95                  "2: two ports (default)");
  96 MODULE_PARM_DESC(use_hp_mr,
  97                  "high performance MRs (0: no (default), 1: yes)");
  98 MODULE_PARM_DESC(port_act_time,
  99                  "time to wait for port activation (default: 30 sec)");
 100 MODULE_PARM_DESC(poll_all_eqs,
 101                  "polls all event queues periodically"
 102                  " (0: no, 1: yes (default))");
 103 MODULE_PARM_DESC(static_rate,
 104                  "set permanent static rate (default: disabled)");
 105 MODULE_PARM_DESC(scaling_code,
 106                  "set scaling code (0: disabled/default, 1: enabled)");
 107 MODULE_PARM_DESC(mr_largepage,
 108                  "use large page for MR (0: use PAGE_SIZE (default), "
 109                  "1: use large page depending on MR size");
 110 MODULE_PARM_DESC(lock_hcalls,
 111                  "serialize all hCalls made by the driver "
 112                  "(default: autodetect)");
 113
 114 DEFINE_RWLOCK(ehca_qp_idr_lock);
 115 DEFINE_RWLOCK(ehca_cq_idr_lock);
 116 DEFINE_IDR(ehca_qp_idr);
 117 DEFINE_IDR(ehca_cq_idr);
 118
 119 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 120 static DEFINE_SPINLOCK(shca_list_lock);
 121
 122 static struct timer_list poll_eqs_timer;
 123
 124 #ifdef CONFIG_PPC_64K_PAGES
 125 static struct kmem_cache *ctblk_cache;
 126
 127 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 128 {
 129         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 130         if (!ret)
 131                 ehca_gen_err("Out of memory for ctblk");
 132         return ret;
 133 }
 134
 135 void ehca_free_fw_ctrlblock(void *ptr)
 136 {
 137         if (ptr)
 138                 kmem_cache_free(ctblk_cache, ptr);
 139
 140 }
 141 #endif
 142
 143 int ehca2ib_return_code(u64 ehca_rc)
 144 {
 145         switch (ehca_rc) {
 146         case H_SUCCESS:
 147                 return 0;
 148         case H_RESOURCE:             /* Resource in use */
 149         case H_BUSY:
 150                 return -EBUSY;
 151         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 152         case H_CONSTRAINED:          /* resource constraint */
 153         case H_NO_MEM:
 154                 return -ENOMEM;
 155         default:
 156                 return -EINVAL;
 157         }
 158 }
 159
 160 static int ehca_create_slab_caches(void)
 161 {
 162         int ret;
 163
 164         ret = ehca_init_pd_cache();
 165         if (ret) {
 166                 ehca_gen_err("Cannot create PD SLAB cache.");
 167                 return ret;
 168         }
 169
 170         ret = ehca_init_cq_cache();
 171         if (ret) {
 172                 ehca_gen_err("Cannot create CQ SLAB cache.");
 173                 goto create_slab_caches2;
 174         }
 175
 176         ret = ehca_init_qp_cache();
 177         if (ret) {
 178                 ehca_gen_err("Cannot create QP SLAB cache.");
 179                 goto create_slab_caches3;
 180         }
 181
 182         ret = ehca_init_av_cache();
 183         if (ret) {
 184                 ehca_gen_err("Cannot create AV SLAB cache.");
 185                 goto create_slab_caches4;
 186         }
 187
 188         ret = ehca_init_mrmw_cache();
 189         if (ret) {
 190                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 191                 goto create_slab_caches5;
 192         }
 193
 194         ret = ehca_init_small_qp_cache();
 195         if (ret) {
 196                 ehca_gen_err("Cannot create small queue SLAB cache.");
 197                 goto create_slab_caches6;
 198         }
 199
 200 #ifdef CONFIG_PPC_64K_PAGES
 201         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 202                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 203                                         SLAB_HWCACHE_ALIGN,
 204                                         NULL);
 205         if (!ctblk_cache) {
 206                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 207                 ehca_cleanup_small_qp_cache();
 208                 goto create_slab_caches6;
 209         }
 210 #endif
 211         return 0;
 212
 213 create_slab_caches6:
 214         ehca_cleanup_mrmw_cache();
 215
 216 create_slab_caches5:
 217         ehca_cleanup_av_cache();
 218
 219 create_slab_caches4:
 220         ehca_cleanup_qp_cache();
 221
 222 create_slab_caches3:
 223         ehca_cleanup_cq_cache();
 224
 225 create_slab_caches2:
 226         ehca_cleanup_pd_cache();
 227
 228         return ret;
 229 }
 230
 231 static void ehca_destroy_slab_caches(void)
 232 {
 233         ehca_cleanup_small_qp_cache();
 234         ehca_cleanup_mrmw_cache();
 235         ehca_cleanup_av_cache();
 236         ehca_cleanup_qp_cache();
 237         ehca_cleanup_cq_cache();
 238         ehca_cleanup_pd_cache();
 239 #ifdef CONFIG_PPC_64K_PAGES
 240         if (ctblk_cache)
 241                 kmem_cache_destroy(ctblk_cache);
 242 #endif
 243 }
 244
 245 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 246 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 247
 248 static struct cap_descr {
 249         u64 mask;
 250         char *descr;
 251 } hca_cap_descr[] = {
 252         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 253         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 254         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 255         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 256         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 257         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 258         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 259         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 260         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 261         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 262         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 263         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 264         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 265         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 266         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 267         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 268         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 269         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 270 };
 271
 272 static int ehca_sense_attributes(struct ehca_shca *shca)
 273 {
 274         int i, ret = 0;
 275         u64 h_ret;
 276         struct hipz_query_hca *rblock;
 277         struct hipz_query_port *port;
 278
 279         static const u32 pgsize_map[] = {
 280                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 281                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 282                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 283                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 284         };
 285
 286         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 287         if (!rblock) {
 288                 ehca_gen_err("Cannot allocate rblock memory.");
 289                 return -ENOMEM;
 290         }
 291
 292         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 293         if (h_ret != H_SUCCESS) {
 294                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 295                              h_ret);
 296                 ret = -EPERM;
 297                 goto sense_attributes1;
 298         }
 299
 300         if (ehca_nr_ports == 1)
 301                 shca->num_ports = 1;
 302         else
 303                 shca->num_ports = (u8)rblock->num_ports;
 304
 305         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 306
 307         if (ehca_hw_level == 0) {
 308                 u32 hcaaver;
 309                 u32 revid;
 310
 311                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 312                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 313
 314                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 315
 316                 if (hcaaver == 1) {
 317                         if (revid <= 3)
 318                                 shca->hw_level = 0x10 | (revid + 1);
 319                         else
 320                                 shca->hw_level = 0x14;
 321                 } else if (hcaaver == 2) {
 322                         if (revid == 0)
 323                                 shca->hw_level = 0x21;
 324                         else if (revid == 0x10)
 325                                 shca->hw_level = 0x22;
 326                         else if (revid == 0x20 || revid == 0x21)
 327                                 shca->hw_level = 0x23;
 328                 }
 329
 330                 if (!shca->hw_level) {
 331                         ehca_gen_warn("unknown hardware version"
 332                                       " - assuming default level");
 333                         shca->hw_level = 0x22;
 334                 }
 335         } else
 336                 shca->hw_level = ehca_hw_level;
 337         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 338
 339         shca->hca_cap = rblock->hca_cap_indicators;
 340         ehca_gen_dbg(" ... HCA capabilities:");
 341         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 342                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 343                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 344
 345         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 346          * a firmware property, so it's valid across all adapters
 347          */
 348         if (ehca_lock_hcalls == -1)
 349                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
 350
 351         /* translate supported MR page sizes; always support 4K */
 352         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 353         if (ehca_mr_largepage) { /* support extra sizes only if enabled */
 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
 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",
 571                         ehca_debug_level);
 572 }
 573
 574 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 575                                       const char *buf, size_t count)
 576 {
 577         int value = (*buf) - '0';
 578         if (value >= 0 && value <= 9)
 579                 ehca_debug_level = value;
 580         return 1;
 581 }
 582
 583 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 584                    ehca_show_debug_level, ehca_store_debug_level);
 585
 586 static struct attribute *ehca_drv_attrs[] = {
 587         &driver_attr_debug_level.attr,
 588         NULL
 589 };
 590
 591 static struct attribute_group ehca_drv_attr_grp = {
 592         .attrs = ehca_drv_attrs
 593 };
 594
 595 static struct attribute_group *ehca_drv_attr_groups[] = {
 596         &ehca_drv_attr_grp,
 597         NULL,
 598 };
 599
 600 #define EHCA_RESOURCE_ATTR(name)                                           \
 601 static ssize_t  ehca_show_##name(struct device *dev,                       \
 602                                  struct device_attribute *attr,            \
 603                                  char *buf)                                \
 604 {                                                                          \
 605         struct ehca_shca *shca;                                            \
 606         struct hipz_query_hca *rblock;                                     \
 607         int data;                                                          \
 608                                                                            \
 609         shca = dev->driver_data;                                           \
 610                                                                            \
 611         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 612         if (!rblock) {                                                     \
 613                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 614                 return 0;                                                  \
 615         }                                                                  \
 616                                                                            \
 617         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 618                 dev_err(dev, "Can't query device properties\n");           \
 619                 ehca_free_fw_ctrlblock(rblock);                            \
 620                 return 0;                                                  \
 621         }                                                                  \
 622                                                                            \
 623         data = rblock->name;                                               \
 624         ehca_free_fw_ctrlblock(rblock);                                    \
 625                                                                            \
 626         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 627                 return snprintf(buf, 256, "1\n");                          \
 628         else                                                               \
 629                 return snprintf(buf, 256, "%d\n", data);                   \
 630                                                                            \
 631 }                                                                          \
 632 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 633
 634 EHCA_RESOURCE_ATTR(num_ports);
 635 EHCA_RESOURCE_ATTR(hw_ver);
 636 EHCA_RESOURCE_ATTR(max_eq);
 637 EHCA_RESOURCE_ATTR(cur_eq);
 638 EHCA_RESOURCE_ATTR(max_cq);
 639 EHCA_RESOURCE_ATTR(cur_cq);
 640 EHCA_RESOURCE_ATTR(max_qp);
 641 EHCA_RESOURCE_ATTR(cur_qp);
 642 EHCA_RESOURCE_ATTR(max_mr);
 643 EHCA_RESOURCE_ATTR(cur_mr);
 644 EHCA_RESOURCE_ATTR(max_mw);
 645 EHCA_RESOURCE_ATTR(cur_mw);
 646 EHCA_RESOURCE_ATTR(max_pd);
 647 EHCA_RESOURCE_ATTR(max_ah);
 648
 649 static ssize_t ehca_show_adapter_handle(struct device *dev,
 650                                         struct device_attribute *attr,
 651                                         char *buf)
 652 {
 653         struct ehca_shca *shca = dev->driver_data;
 654
 655         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 656
 657 }
 658 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 659
 660 static ssize_t ehca_show_mr_largepage(struct device *dev,
 661                                       struct device_attribute *attr,
 662                                       char *buf)
 663 {
 664         return sprintf(buf, "%d\n", ehca_mr_largepage);
 665 }
 666 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
 667
 668 static struct attribute *ehca_dev_attrs[] = {
 669         &dev_attr_adapter_handle.attr,
 670         &dev_attr_num_ports.attr,
 671         &dev_attr_hw_ver.attr,
 672         &dev_attr_max_eq.attr,
 673         &dev_attr_cur_eq.attr,
 674         &dev_attr_max_cq.attr,
 675         &dev_attr_cur_cq.attr,
 676         &dev_attr_max_qp.attr,
 677         &dev_attr_cur_qp.attr,
 678         &dev_attr_max_mr.attr,
 679         &dev_attr_cur_mr.attr,
 680         &dev_attr_max_mw.attr,
 681         &dev_attr_cur_mw.attr,
 682         &dev_attr_max_pd.attr,
 683         &dev_attr_max_ah.attr,
 684         &dev_attr_mr_largepage.attr,
 685         NULL
 686 };
 687
 688 static struct attribute_group ehca_dev_attr_grp = {
 689         .attrs = ehca_dev_attrs
 690 };
 691
 692 static int __devinit ehca_probe(struct of_device *dev,
 693                                 const struct of_device_id *id)
 694 {
 695         struct ehca_shca *shca;
 696         const u64 *handle;
 697         struct ib_pd *ibpd;
 698         int ret, i;
 699
 700         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 701         if (!handle) {
 702                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 703                              dev->node->full_name);
 704                 return -ENODEV;
 705         }
 706
 707         if (!(*handle)) {
 708                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 709                              dev->node->full_name);
 710                 return -ENODEV;
 711         }
 712
 713         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 714         if (!shca) {
 715                 ehca_gen_err("Cannot allocate shca memory.");
 716                 return -ENOMEM;
 717         }
 718         mutex_init(&shca->modify_mutex);
 719         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 720                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
 721
 722         shca->ofdev = dev;
 723         shca->ipz_hca_handle.handle = *handle;
 724         dev->dev.driver_data = shca;
 725
 726         ret = ehca_sense_attributes(shca);
 727         if (ret < 0) {
 728                 ehca_gen_err("Cannot sense eHCA attributes.");
 729                 goto probe1;
 730         }
 731
 732         ret = ehca_init_device(shca);
 733         if (ret) {
 734                 ehca_gen_err("Cannot init ehca  device struct");
 735                 goto probe1;
 736         }
 737
 738         /* create event queues */
 739         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 740         if (ret) {
 741                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 742                 goto probe1;
 743         }
 744
 745         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 746         if (ret) {
 747                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 748                 goto probe3;
 749         }
 750
 751         /* create internal protection domain */
 752         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 753         if (IS_ERR(ibpd)) {
 754                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 755                 ret = PTR_ERR(ibpd);
 756                 goto probe4;
 757         }
 758
 759         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 760         shca->pd->ib_pd.device = &shca->ib_device;
 761
 762         /* create internal max MR */
 763         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 764
 765         if (ret) {
 766                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 767                          ret);
 768                 goto probe5;
 769         }
 770
 771         ret = ib_register_device(&shca->ib_device);
 772         if (ret) {
 773                 ehca_err(&shca->ib_device,
 774                          "ib_register_device() failed ret=%i", ret);
 775                 goto probe6;
 776         }
 777
 778         /* create AQP1 for port 1 */
 779         if (ehca_open_aqp1 == 1) {
 780                 shca->sport[0].port_state = IB_PORT_DOWN;
 781                 ret = ehca_create_aqp1(shca, 1);
 782                 if (ret) {
 783                         ehca_err(&shca->ib_device,
 784                                  "Cannot create AQP1 for port 1.");
 785                         goto probe7;
 786                 }
 787         }
 788
 789         /* create AQP1 for port 2 */
 790         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 791                 shca->sport[1].port_state = IB_PORT_DOWN;
 792                 ret = ehca_create_aqp1(shca, 2);
 793                 if (ret) {
 794                         ehca_err(&shca->ib_device,
 795                                  "Cannot create AQP1 for port 2.");
 796                         goto probe8;
 797                 }
 798         }
 799
 800         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 801         if (ret) /* only complain; we can live without attributes */
 802                 ehca_err(&shca->ib_device,
 803                          "Cannot create device attributes  ret=%d", ret);
 804
 805         spin_lock(&shca_list_lock);
 806         list_add(&shca->shca_list, &shca_list);
 807         spin_unlock(&shca_list_lock);
 808
 809         return 0;
 810
 811 probe8:
 812         ret = ehca_destroy_aqp1(&shca->sport[0]);
 813         if (ret)
 814                 ehca_err(&shca->ib_device,
 815                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 816
 817 probe7:
 818         ib_unregister_device(&shca->ib_device);
 819
 820 probe6:
 821         ret = ehca_dereg_internal_maxmr(shca);
 822         if (ret)
 823                 ehca_err(&shca->ib_device,
 824                          "Cannot destroy internal MR. ret=%x", ret);
 825
 826 probe5:
 827         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 828         if (ret)
 829                 ehca_err(&shca->ib_device,
 830                          "Cannot destroy internal PD. ret=%x", ret);
 831
 832 probe4:
 833         ret = ehca_destroy_eq(shca, &shca->neq);
 834         if (ret)
 835                 ehca_err(&shca->ib_device,
 836                          "Cannot destroy NEQ. ret=%x", ret);
 837
 838 probe3:
 839         ret = ehca_destroy_eq(shca, &shca->eq);
 840         if (ret)
 841                 ehca_err(&shca->ib_device,
 842                          "Cannot destroy EQ. ret=%x", ret);
 843
 844 probe1:
 845         ib_dealloc_device(&shca->ib_device);
 846
 847         return -EINVAL;
 848 }
 849
 850 static int __devexit ehca_remove(struct of_device *dev)
 851 {
 852         struct ehca_shca *shca = dev->dev.driver_data;
 853         int ret;
 854
 855         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 856
 857         if (ehca_open_aqp1 == 1) {
 858                 int i;
 859                 for (i = 0; i < shca->num_ports; i++) {
 860                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 861                         if (ret)
 862                                 ehca_err(&shca->ib_device,
 863                                          "Cannot destroy AQP1 for port %x "
 864                                          "ret=%i", ret, i);
 865                 }
 866         }
 867
 868         ib_unregister_device(&shca->ib_device);
 869
 870         ret = ehca_dereg_internal_maxmr(shca);
 871         if (ret)
 872                 ehca_err(&shca->ib_device,
 873                          "Cannot destroy internal MR. ret=%i", ret);
 874
 875         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 876         if (ret)
 877                 ehca_err(&shca->ib_device,
 878                          "Cannot destroy internal PD. ret=%i", ret);
 879
 880         ret = ehca_destroy_eq(shca, &shca->eq);
 881         if (ret)
 882                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 883
 884         ret = ehca_destroy_eq(shca, &shca->neq);
 885         if (ret)
 886                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 887
 888         ib_dealloc_device(&shca->ib_device);
 889
 890         spin_lock(&shca_list_lock);
 891         list_del(&shca->shca_list);
 892         spin_unlock(&shca_list_lock);
 893
 894         return ret;
 895 }
 896
 897 static struct of_device_id ehca_device_table[] =
 898 {
 899         {
 900                 .name       = "lhca",
 901                 .compatible = "IBM,lhca",
 902         },
 903         {},
 904 };
 905
 906 static struct of_platform_driver ehca_driver = {
 907         .name        = "ehca",
 908         .match_table = ehca_device_table,
 909         .probe       = ehca_probe,
 910         .remove      = ehca_remove,
 911         .driver      = {
 912                 .groups = ehca_drv_attr_groups,
 913         },
 914 };
 915
 916 void ehca_poll_eqs(unsigned long data)
 917 {
 918         struct ehca_shca *shca;
 919
 920         spin_lock(&shca_list_lock);
 921         list_for_each_entry(shca, &shca_list, shca_list) {
 922                 if (shca->eq.is_initialized) {
 923                         /* call deadman proc only if eq ptr does not change */
 924                         struct ehca_eq *eq = &shca->eq;
 925                         int max = 3;
 926                         volatile u64 q_ofs, q_ofs2;
 927                         u64 flags;
 928                         spin_lock_irqsave(&eq->spinlock, flags);
 929                         q_ofs = eq->ipz_queue.current_q_offset;
 930                         spin_unlock_irqrestore(&eq->spinlock, flags);
 931                         do {
 932                                 spin_lock_irqsave(&eq->spinlock, flags);
 933                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 934                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 935                                 max--;
 936                         } while (q_ofs == q_ofs2 && max > 0);
 937                         if (q_ofs == q_ofs2)
 938                                 ehca_process_eq(shca, 0);
 939                 }
 940         }
 941         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
 942         spin_unlock(&shca_list_lock);
 943 }
 944
 945 static int __init ehca_module_init(void)
 946 {
 947         int ret;
 948
 949         printk(KERN_INFO "eHCA Infiniband Device Driver "
 950                "(Version " HCAD_VERSION ")\n");
 951
 952         ret = ehca_create_comp_pool();
 953         if (ret) {
 954                 ehca_gen_err("Cannot create comp pool.");
 955                 return ret;
 956         }
 957
 958         ret = ehca_create_slab_caches();
 959         if (ret) {
 960                 ehca_gen_err("Cannot create SLAB caches");
 961                 ret = -ENOMEM;
 962                 goto module_init1;
 963         }
 964
 965         ret = ibmebus_register_driver(&ehca_driver);
 966         if (ret) {
 967                 ehca_gen_err("Cannot register eHCA device driver");
 968                 ret = -EINVAL;
 969                 goto module_init2;
 970         }
 971
 972         if (ehca_poll_all_eqs != 1) {
 973                 ehca_gen_err("WARNING!!!");
 974                 ehca_gen_err("It is possible to lose interrupts.");
 975         } else {
 976                 init_timer(&poll_eqs_timer);
 977                 poll_eqs_timer.function = ehca_poll_eqs;
 978                 poll_eqs_timer.expires = jiffies + HZ;
 979                 add_timer(&poll_eqs_timer);
 980         }
 981
 982         return 0;
 983
 984 module_init2:
 985         ehca_destroy_slab_caches();
 986
 987 module_init1:
 988         ehca_destroy_comp_pool();
 989         return ret;
 990 };
 991
 992 static void __exit ehca_module_exit(void)
 993 {
 994         if (ehca_poll_all_eqs == 1)
 995                 del_timer_sync(&poll_eqs_timer);
 996
 997         ibmebus_unregister_driver(&ehca_driver);
 998
 999         ehca_destroy_slab_caches();
1000
1001         ehca_destroy_comp_pool();
1002
1003         idr_destroy(&ehca_cq_idr);
1004         idr_destroy(&ehca_qp_idr);
1005 };
1006
1007 module_init(ehca_module_init);
1008 module_exit(ehca_module_exit);