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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 int ehca_max_cq        = -1;
  72 int ehca_max_qp        = -1;
  73
  74 module_param_named(open_aqp1,     ehca_open_aqp1,     bool, S_IRUGO);
  75 module_param_named(debug_level,   ehca_debug_level,   int,  S_IRUGO);
  76 module_param_named(hw_level,      ehca_hw_level,      int,  S_IRUGO);
  77 module_param_named(nr_ports,      ehca_nr_ports,      int,  S_IRUGO);
  78 module_param_named(use_hp_mr,     ehca_use_hp_mr,     bool, S_IRUGO);
  79 module_param_named(port_act_time, ehca_port_act_time, int,  S_IRUGO);
  80 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  bool, S_IRUGO);
  81 module_param_named(static_rate,   ehca_static_rate,   int,  S_IRUGO);
  82 module_param_named(scaling_code,  ehca_scaling_code,  bool, S_IRUGO);
  83 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
  84 module_param_named(number_of_cqs, ehca_max_cq,        int,  S_IRUGO);
  85 module_param_named(number_of_qps, ehca_max_qp,        int,  S_IRUGO);
  86
  87 MODULE_PARM_DESC(open_aqp1,
  88                  "Open AQP1 on startup (default: no)");
  89 MODULE_PARM_DESC(debug_level,
  90                  "Amount of debug output (0: none (default), 1: traces, "
  91                  "2: some dumps, 3: lots)");
  92 MODULE_PARM_DESC(hw_level,
  93                  "Hardware level (0: autosensing (default), "
  94                  "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
  95 MODULE_PARM_DESC(nr_ports,
  96                  "number of connected ports (-1: autodetect, 1: port one only, "
  97                  "2: two ports (default)");
  98 MODULE_PARM_DESC(use_hp_mr,
  99                  "Use high performance MRs (default: no)");
 100 MODULE_PARM_DESC(port_act_time,
 101                  "Time to wait for port activation (default: 30 sec)");
 102 MODULE_PARM_DESC(poll_all_eqs,
 103                  "Poll all event queues periodically (default: yes)");
 104 MODULE_PARM_DESC(static_rate,
 105                  "Set permanent static rate (default: no static rate)");
 106 MODULE_PARM_DESC(scaling_code,
 107                  "Enable scaling code (default: no)");
 108 MODULE_PARM_DESC(lock_hcalls,
 109                  "Serialize all hCalls made by the driver "
 110                  "(default: autodetect)");
 111 MODULE_PARM_DESC(number_of_cqs,
 112                 "Max number of CQs which can be allocated "
 113                 "(default: autodetect)");
 114 MODULE_PARM_DESC(number_of_qps,
 115                 "Max number of QPs which can be allocated "
 116                 "(default: autodetect)");
 117
 118 DEFINE_RWLOCK(ehca_qp_idr_lock);
 119 DEFINE_RWLOCK(ehca_cq_idr_lock);
 120 DEFINE_IDR(ehca_qp_idr);
 121 DEFINE_IDR(ehca_cq_idr);
 122
 123 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 124 static DEFINE_SPINLOCK(shca_list_lock);
 125
 126 static struct timer_list poll_eqs_timer;
 127
 128 #ifdef CONFIG_PPC_64K_PAGES
 129 static struct kmem_cache *ctblk_cache;
 130
 131 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 132 {
 133         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 134         if (!ret)
 135                 ehca_gen_err("Out of memory for ctblk");
 136         return ret;
 137 }
 138
 139 void ehca_free_fw_ctrlblock(void *ptr)
 140 {
 141         if (ptr)
 142                 kmem_cache_free(ctblk_cache, ptr);
 143
 144 }
 145 #endif
 146
 147 int ehca2ib_return_code(u64 ehca_rc)
 148 {
 149         switch (ehca_rc) {
 150         case H_SUCCESS:
 151                 return 0;
 152         case H_RESOURCE:             /* Resource in use */
 153         case H_BUSY:
 154                 return -EBUSY;
 155         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 156         case H_CONSTRAINED:          /* resource constraint */
 157         case H_NO_MEM:
 158                 return -ENOMEM;
 159         default:
 160                 return -EINVAL;
 161         }
 162 }
 163
 164 static int ehca_create_slab_caches(void)
 165 {
 166         int ret;
 167
 168         ret = ehca_init_pd_cache();
 169         if (ret) {
 170                 ehca_gen_err("Cannot create PD SLAB cache.");
 171                 return ret;
 172         }
 173
 174         ret = ehca_init_cq_cache();
 175         if (ret) {
 176                 ehca_gen_err("Cannot create CQ SLAB cache.");
 177                 goto create_slab_caches2;
 178         }
 179
 180         ret = ehca_init_qp_cache();
 181         if (ret) {
 182                 ehca_gen_err("Cannot create QP SLAB cache.");
 183                 goto create_slab_caches3;
 184         }
 185
 186         ret = ehca_init_av_cache();
 187         if (ret) {
 188                 ehca_gen_err("Cannot create AV SLAB cache.");
 189                 goto create_slab_caches4;
 190         }
 191
 192         ret = ehca_init_mrmw_cache();
 193         if (ret) {
 194                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 195                 goto create_slab_caches5;
 196         }
 197
 198         ret = ehca_init_small_qp_cache();
 199         if (ret) {
 200                 ehca_gen_err("Cannot create small queue SLAB cache.");
 201                 goto create_slab_caches6;
 202         }
 203
 204 #ifdef CONFIG_PPC_64K_PAGES
 205         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 206                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 207                                         SLAB_HWCACHE_ALIGN,
 208                                         NULL);
 209         if (!ctblk_cache) {
 210                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 211                 ehca_cleanup_small_qp_cache();
 212                 goto create_slab_caches6;
 213         }
 214 #endif
 215         return 0;
 216
 217 create_slab_caches6:
 218         ehca_cleanup_mrmw_cache();
 219
 220 create_slab_caches5:
 221         ehca_cleanup_av_cache();
 222
 223 create_slab_caches4:
 224         ehca_cleanup_qp_cache();
 225
 226 create_slab_caches3:
 227         ehca_cleanup_cq_cache();
 228
 229 create_slab_caches2:
 230         ehca_cleanup_pd_cache();
 231
 232         return ret;
 233 }
 234
 235 static void ehca_destroy_slab_caches(void)
 236 {
 237         ehca_cleanup_small_qp_cache();
 238         ehca_cleanup_mrmw_cache();
 239         ehca_cleanup_av_cache();
 240         ehca_cleanup_qp_cache();
 241         ehca_cleanup_cq_cache();
 242         ehca_cleanup_pd_cache();
 243 #ifdef CONFIG_PPC_64K_PAGES
 244         if (ctblk_cache)
 245                 kmem_cache_destroy(ctblk_cache);
 246 #endif
 247 }
 248
 249 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 250 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 251
 252 static struct cap_descr {
 253         u64 mask;
 254         char *descr;
 255 } hca_cap_descr[] = {
 256         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 257         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 258         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 259         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 260         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 261         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 262         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 263         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 264         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 265         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 266         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 267         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 268         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 269         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 270         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 271         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 272         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 273         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 274 };
 275
 276 static int ehca_sense_attributes(struct ehca_shca *shca)
 277 {
 278         int i, ret = 0;
 279         u64 h_ret;
 280         struct hipz_query_hca *rblock;
 281         struct hipz_query_port *port;
 282         const char *loc_code;
 283
 284         static const u32 pgsize_map[] = {
 285                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 286                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 287                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 288                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 289         };
 290
 291         ehca_gen_dbg("Probing adapter %s...",
 292                      shca->ofdev->node->full_name);
 293         loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
 294         if (loc_code)
 295                 ehca_gen_dbg(" ... location lode=%s", loc_code);
 296
 297         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 298         if (!rblock) {
 299                 ehca_gen_err("Cannot allocate rblock memory.");
 300                 return -ENOMEM;
 301         }
 302
 303         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 304         if (h_ret != H_SUCCESS) {
 305                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 306                              h_ret);
 307                 ret = -EPERM;
 308                 goto sense_attributes1;
 309         }
 310
 311         if (ehca_nr_ports == 1)
 312                 shca->num_ports = 1;
 313         else
 314                 shca->num_ports = (u8)rblock->num_ports;
 315
 316         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 317
 318         if (ehca_hw_level == 0) {
 319                 u32 hcaaver;
 320                 u32 revid;
 321
 322                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 323                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 324
 325                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 326
 327                 if (hcaaver == 1) {
 328                         if (revid <= 3)
 329                                 shca->hw_level = 0x10 | (revid + 1);
 330                         else
 331                                 shca->hw_level = 0x14;
 332                 } else if (hcaaver == 2) {
 333                         if (revid == 0)
 334                                 shca->hw_level = 0x21;
 335                         else if (revid == 0x10)
 336                                 shca->hw_level = 0x22;
 337                         else if (revid == 0x20 || revid == 0x21)
 338                                 shca->hw_level = 0x23;
 339                 }
 340
 341                 if (!shca->hw_level) {
 342                         ehca_gen_warn("unknown hardware version"
 343                                       " - assuming default level");
 344                         shca->hw_level = 0x22;
 345                 }
 346         } else
 347                 shca->hw_level = ehca_hw_level;
 348         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 349
 350         shca->hca_cap = rblock->hca_cap_indicators;
 351         ehca_gen_dbg(" ... HCA capabilities:");
 352         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 353                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 354                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 355
 356         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 357          * a firmware property, so it's valid across all adapters
 358          */
 359         if (ehca_lock_hcalls == -1)
 360                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
 361
 362         /* translate supported MR page sizes; always support 4K */
 363         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 364         for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 365                 if (rblock->memory_page_size_supported & pgsize_map[i])
 366                         shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 367
 368         /* Set maximum number of CQs and QPs to calculate EQ size */
 369         if (ehca_max_qp == -1)
 370                 ehca_max_qp = min_t(int, rblock->max_qp, EHCA_MAX_NUM_QUEUES);
 371         else if (ehca_max_qp < 1 || ehca_max_qp > rblock->max_qp) {
 372                 ehca_gen_err("Requested number of QPs is out of range (1 - %i) "
 373                         "specified by HW", rblock->max_qp);
 374                 ret = -EINVAL;
 375                 goto sense_attributes1;
 376         }
 377
 378         if (ehca_max_cq == -1)
 379                 ehca_max_cq = min_t(int, rblock->max_cq, EHCA_MAX_NUM_QUEUES);
 380         else if (ehca_max_cq < 1 || ehca_max_cq > rblock->max_cq) {
 381                 ehca_gen_err("Requested number of CQs is out of range (1 - %i) "
 382                         "specified by HW", rblock->max_cq);
 383                 ret = -EINVAL;
 384                 goto sense_attributes1;
 385         }
 386
 387         /* query max MTU from first port -- it's the same for all ports */
 388         port = (struct hipz_query_port *)rblock;
 389         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 390         if (h_ret != H_SUCCESS) {
 391                 ehca_gen_err("Cannot query port properties. h_ret=%li",
 392                              h_ret);
 393                 ret = -EPERM;
 394                 goto sense_attributes1;
 395         }
 396
 397         shca->max_mtu = port->max_mtu;
 398
 399 sense_attributes1:
 400         ehca_free_fw_ctrlblock(rblock);
 401         return ret;
 402 }
 403
 404 static int init_node_guid(struct ehca_shca *shca)
 405 {
 406         int ret = 0;
 407         struct hipz_query_hca *rblock;
 408
 409         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 410         if (!rblock) {
 411                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 412                 return -ENOMEM;
 413         }
 414
 415         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 416                 ehca_err(&shca->ib_device, "Can't query device properties");
 417                 ret = -EINVAL;
 418                 goto init_node_guid1;
 419         }
 420
 421         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 422
 423 init_node_guid1:
 424         ehca_free_fw_ctrlblock(rblock);
 425         return ret;
 426 }
 427
 428 static int ehca_init_device(struct ehca_shca *shca)
 429 {
 430         int ret;
 431
 432         ret = init_node_guid(shca);
 433         if (ret)
 434                 return ret;
 435
 436         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 437         shca->ib_device.owner               = THIS_MODULE;
 438
 439         shca->ib_device.uverbs_abi_ver      = 8;
 440         shca->ib_device.uverbs_cmd_mask     =
 441                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 442                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 443                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 444                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 445                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 446                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 447                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 448                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 449                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 450                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 451                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 452                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 453                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 454                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 455                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 456                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 457
 458         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 459         shca->ib_device.phys_port_cnt       = shca->num_ports;
 460         shca->ib_device.num_comp_vectors    = 1;
 461         shca->ib_device.dma_device          = &shca->ofdev->dev;
 462         shca->ib_device.query_device        = ehca_query_device;
 463         shca->ib_device.query_port          = ehca_query_port;
 464         shca->ib_device.query_gid           = ehca_query_gid;
 465         shca->ib_device.query_pkey          = ehca_query_pkey;
 466         /* shca->in_device.modify_device    = ehca_modify_device    */
 467         shca->ib_device.modify_port         = ehca_modify_port;
 468         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 469         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 470         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 471         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 472         shca->ib_device.create_ah           = ehca_create_ah;
 473         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 474         shca->ib_device.query_ah            = ehca_query_ah;
 475         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 476         shca->ib_device.create_qp           = ehca_create_qp;
 477         shca->ib_device.modify_qp           = ehca_modify_qp;
 478         shca->ib_device.query_qp            = ehca_query_qp;
 479         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 480         shca->ib_device.post_send           = ehca_post_send;
 481         shca->ib_device.post_recv           = ehca_post_recv;
 482         shca->ib_device.create_cq           = ehca_create_cq;
 483         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 484         shca->ib_device.resize_cq           = ehca_resize_cq;
 485         shca->ib_device.poll_cq             = ehca_poll_cq;
 486         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 487         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 488         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 489         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 490         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 491         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 492         shca->ib_device.query_mr            = ehca_query_mr;
 493         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 494         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 495         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 496         shca->ib_device.bind_mw             = ehca_bind_mw;
 497         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 498         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 499         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 500         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 501         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 502         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 503         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 504         shca->ib_device.process_mad         = ehca_process_mad;
 505         shca->ib_device.mmap                = ehca_mmap;
 506
 507         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 508                 shca->ib_device.uverbs_cmd_mask |=
 509                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 510                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 511                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 512                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 513
 514                 shca->ib_device.create_srq          = ehca_create_srq;
 515                 shca->ib_device.modify_srq          = ehca_modify_srq;
 516                 shca->ib_device.query_srq           = ehca_query_srq;
 517                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 518                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 519         }
 520
 521         return ret;
 522 }
 523
 524 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 525 {
 526         struct ehca_sport *sport = &shca->sport[port - 1];
 527         struct ib_cq *ibcq;
 528         struct ib_qp *ibqp;
 529         struct ib_qp_init_attr qp_init_attr;
 530         int ret;
 531
 532         if (sport->ibcq_aqp1) {
 533                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 534                 return -EPERM;
 535         }
 536
 537         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 538         if (IS_ERR(ibcq)) {
 539                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 540                 return PTR_ERR(ibcq);
 541         }
 542         sport->ibcq_aqp1 = ibcq;
 543
 544         if (sport->ibqp_sqp[IB_QPT_GSI]) {
 545                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 546                 ret = -EPERM;
 547                 goto create_aqp1;
 548         }
 549
 550         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 551         qp_init_attr.send_cq          = ibcq;
 552         qp_init_attr.recv_cq          = ibcq;
 553         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 554         qp_init_attr.cap.max_send_wr  = 100;
 555         qp_init_attr.cap.max_recv_wr  = 100;
 556         qp_init_attr.cap.max_send_sge = 2;
 557         qp_init_attr.cap.max_recv_sge = 1;
 558         qp_init_attr.qp_type          = IB_QPT_GSI;
 559         qp_init_attr.port_num         = port;
 560         qp_init_attr.qp_context       = NULL;
 561         qp_init_attr.event_handler    = NULL;
 562         qp_init_attr.srq              = NULL;
 563
 564         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 565         if (IS_ERR(ibqp)) {
 566                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 567                 ret = PTR_ERR(ibqp);
 568                 goto create_aqp1;
 569         }
 570         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
 571
 572         return 0;
 573
 574 create_aqp1:
 575         ib_destroy_cq(sport->ibcq_aqp1);
 576         return ret;
 577 }
 578
 579 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 580 {
 581         int ret;
 582
 583         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
 584         if (ret) {
 585                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 586                 return ret;
 587         }
 588
 589         ret = ib_destroy_cq(sport->ibcq_aqp1);
 590         if (ret)
 591                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 592
 593         return ret;
 594 }
 595
 596 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 597 {
 598         return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
 599 }
 600
 601 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 602                                       const char *buf, size_t count)
 603 {
 604         int value = (*buf) - '0';
 605         if (value >= 0 && value <= 9)
 606                 ehca_debug_level = value;
 607         return 1;
 608 }
 609
 610 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 611                    ehca_show_debug_level, ehca_store_debug_level);
 612
 613 static struct attribute *ehca_drv_attrs[] = {
 614         &driver_attr_debug_level.attr,
 615         NULL
 616 };
 617
 618 static struct attribute_group ehca_drv_attr_grp = {
 619         .attrs = ehca_drv_attrs
 620 };
 621
 622 static struct attribute_group *ehca_drv_attr_groups[] = {
 623         &ehca_drv_attr_grp,
 624         NULL,
 625 };
 626
 627 #define EHCA_RESOURCE_ATTR(name)                                           \
 628 static ssize_t  ehca_show_##name(struct device *dev,                       \
 629                                  struct device_attribute *attr,            \
 630                                  char *buf)                                \
 631 {                                                                          \
 632         struct ehca_shca *shca;                                            \
 633         struct hipz_query_hca *rblock;                                     \
 634         int data;                                                          \
 635                                                                            \
 636         shca = dev->driver_data;                                           \
 637                                                                            \
 638         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 639         if (!rblock) {                                                     \
 640                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 641                 return 0;                                                  \
 642         }                                                                  \
 643                                                                            \
 644         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 645                 dev_err(dev, "Can't query device properties\n");           \
 646                 ehca_free_fw_ctrlblock(rblock);                            \
 647                 return 0;                                                  \
 648         }                                                                  \
 649                                                                            \
 650         data = rblock->name;                                               \
 651         ehca_free_fw_ctrlblock(rblock);                                    \
 652                                                                            \
 653         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 654                 return snprintf(buf, 256, "1\n");                          \
 655         else                                                               \
 656                 return snprintf(buf, 256, "%d\n", data);                   \
 657                                                                            \
 658 }                                                                          \
 659 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 660
 661 EHCA_RESOURCE_ATTR(num_ports);
 662 EHCA_RESOURCE_ATTR(hw_ver);
 663 EHCA_RESOURCE_ATTR(max_eq);
 664 EHCA_RESOURCE_ATTR(cur_eq);
 665 EHCA_RESOURCE_ATTR(max_cq);
 666 EHCA_RESOURCE_ATTR(cur_cq);
 667 EHCA_RESOURCE_ATTR(max_qp);
 668 EHCA_RESOURCE_ATTR(cur_qp);
 669 EHCA_RESOURCE_ATTR(max_mr);
 670 EHCA_RESOURCE_ATTR(cur_mr);
 671 EHCA_RESOURCE_ATTR(max_mw);
 672 EHCA_RESOURCE_ATTR(cur_mw);
 673 EHCA_RESOURCE_ATTR(max_pd);
 674 EHCA_RESOURCE_ATTR(max_ah);
 675
 676 static ssize_t ehca_show_adapter_handle(struct device *dev,
 677                                         struct device_attribute *attr,
 678                                         char *buf)
 679 {
 680         struct ehca_shca *shca = dev->driver_data;
 681
 682         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 683
 684 }
 685 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 686
 687 static struct attribute *ehca_dev_attrs[] = {
 688         &dev_attr_adapter_handle.attr,
 689         &dev_attr_num_ports.attr,
 690         &dev_attr_hw_ver.attr,
 691         &dev_attr_max_eq.attr,
 692         &dev_attr_cur_eq.attr,
 693         &dev_attr_max_cq.attr,
 694         &dev_attr_cur_cq.attr,
 695         &dev_attr_max_qp.attr,
 696         &dev_attr_cur_qp.attr,
 697         &dev_attr_max_mr.attr,
 698         &dev_attr_cur_mr.attr,
 699         &dev_attr_max_mw.attr,
 700         &dev_attr_cur_mw.attr,
 701         &dev_attr_max_pd.attr,
 702         &dev_attr_max_ah.attr,
 703         NULL
 704 };
 705
 706 static struct attribute_group ehca_dev_attr_grp = {
 707         .attrs = ehca_dev_attrs
 708 };
 709
 710 static int __devinit ehca_probe(struct of_device *dev,
 711                                 const struct of_device_id *id)
 712 {
 713         struct ehca_shca *shca;
 714         const u64 *handle;
 715         struct ib_pd *ibpd;
 716         int ret, i, eq_size;
 717
 718         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 719         if (!handle) {
 720                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 721                              dev->node->full_name);
 722                 return -ENODEV;
 723         }
 724
 725         if (!(*handle)) {
 726                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 727                              dev->node->full_name);
 728                 return -ENODEV;
 729         }
 730
 731         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 732         if (!shca) {
 733                 ehca_gen_err("Cannot allocate shca memory.");
 734                 return -ENOMEM;
 735         }
 736         mutex_init(&shca->modify_mutex);
 737         atomic_set(&shca->num_cqs, 0);
 738         atomic_set(&shca->num_qps, 0);
 739         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 740                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
 741
 742         shca->ofdev = dev;
 743         shca->ipz_hca_handle.handle = *handle;
 744         dev->dev.driver_data = shca;
 745
 746         ret = ehca_sense_attributes(shca);
 747         if (ret < 0) {
 748                 ehca_gen_err("Cannot sense eHCA attributes.");
 749                 goto probe1;
 750         }
 751
 752         ret = ehca_init_device(shca);
 753         if (ret) {
 754                 ehca_gen_err("Cannot init ehca  device struct");
 755                 goto probe1;
 756         }
 757
 758         eq_size = 2 * ehca_max_cq + 4 * ehca_max_qp;
 759         /* create event queues */
 760         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
 761         if (ret) {
 762                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 763                 goto probe1;
 764         }
 765
 766         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 767         if (ret) {
 768                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 769                 goto probe3;
 770         }
 771
 772         /* create internal protection domain */
 773         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 774         if (IS_ERR(ibpd)) {
 775                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 776                 ret = PTR_ERR(ibpd);
 777                 goto probe4;
 778         }
 779
 780         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 781         shca->pd->ib_pd.device = &shca->ib_device;
 782
 783         /* create internal max MR */
 784         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 785
 786         if (ret) {
 787                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 788                          ret);
 789                 goto probe5;
 790         }
 791
 792         ret = ib_register_device(&shca->ib_device);
 793         if (ret) {
 794                 ehca_err(&shca->ib_device,
 795                          "ib_register_device() failed ret=%i", ret);
 796                 goto probe6;
 797         }
 798
 799         /* create AQP1 for port 1 */
 800         if (ehca_open_aqp1 == 1) {
 801                 shca->sport[0].port_state = IB_PORT_DOWN;
 802                 ret = ehca_create_aqp1(shca, 1);
 803                 if (ret) {
 804                         ehca_err(&shca->ib_device,
 805                                  "Cannot create AQP1 for port 1.");
 806                         goto probe7;
 807                 }
 808         }
 809
 810         /* create AQP1 for port 2 */
 811         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 812                 shca->sport[1].port_state = IB_PORT_DOWN;
 813                 ret = ehca_create_aqp1(shca, 2);
 814                 if (ret) {
 815                         ehca_err(&shca->ib_device,
 816                                  "Cannot create AQP1 for port 2.");
 817                         goto probe8;
 818                 }
 819         }
 820
 821         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 822         if (ret) /* only complain; we can live without attributes */
 823                 ehca_err(&shca->ib_device,
 824                          "Cannot create device attributes  ret=%d", ret);
 825
 826         spin_lock(&shca_list_lock);
 827         list_add(&shca->shca_list, &shca_list);
 828         spin_unlock(&shca_list_lock);
 829
 830         return 0;
 831
 832 probe8:
 833         ret = ehca_destroy_aqp1(&shca->sport[0]);
 834         if (ret)
 835                 ehca_err(&shca->ib_device,
 836                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 837
 838 probe7:
 839         ib_unregister_device(&shca->ib_device);
 840
 841 probe6:
 842         ret = ehca_dereg_internal_maxmr(shca);
 843         if (ret)
 844                 ehca_err(&shca->ib_device,
 845                          "Cannot destroy internal MR. ret=%x", ret);
 846
 847 probe5:
 848         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 849         if (ret)
 850                 ehca_err(&shca->ib_device,
 851                          "Cannot destroy internal PD. ret=%x", ret);
 852
 853 probe4:
 854         ret = ehca_destroy_eq(shca, &shca->neq);
 855         if (ret)
 856                 ehca_err(&shca->ib_device,
 857                          "Cannot destroy NEQ. ret=%x", ret);
 858
 859 probe3:
 860         ret = ehca_destroy_eq(shca, &shca->eq);
 861         if (ret)
 862                 ehca_err(&shca->ib_device,
 863                          "Cannot destroy EQ. ret=%x", ret);
 864
 865 probe1:
 866         ib_dealloc_device(&shca->ib_device);
 867
 868         return -EINVAL;
 869 }
 870
 871 static int __devexit ehca_remove(struct of_device *dev)
 872 {
 873         struct ehca_shca *shca = dev->dev.driver_data;
 874         int ret;
 875
 876         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 877
 878         if (ehca_open_aqp1 == 1) {
 879                 int i;
 880                 for (i = 0; i < shca->num_ports; i++) {
 881                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 882                         if (ret)
 883                                 ehca_err(&shca->ib_device,
 884                                          "Cannot destroy AQP1 for port %x "
 885                                          "ret=%i", ret, i);
 886                 }
 887         }
 888
 889         ib_unregister_device(&shca->ib_device);
 890
 891         ret = ehca_dereg_internal_maxmr(shca);
 892         if (ret)
 893                 ehca_err(&shca->ib_device,
 894                          "Cannot destroy internal MR. ret=%i", ret);
 895
 896         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 897         if (ret)
 898                 ehca_err(&shca->ib_device,
 899                          "Cannot destroy internal PD. ret=%i", ret);
 900
 901         ret = ehca_destroy_eq(shca, &shca->eq);
 902         if (ret)
 903                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 904
 905         ret = ehca_destroy_eq(shca, &shca->neq);
 906         if (ret)
 907                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 908
 909         ib_dealloc_device(&shca->ib_device);
 910
 911         spin_lock(&shca_list_lock);
 912         list_del(&shca->shca_list);
 913         spin_unlock(&shca_list_lock);
 914
 915         return ret;
 916 }
 917
 918 static struct of_device_id ehca_device_table[] =
 919 {
 920         {
 921                 .name       = "lhca",
 922                 .compatible = "IBM,lhca",
 923         },
 924         {},
 925 };
 926
 927 static struct of_platform_driver ehca_driver = {
 928         .name        = "ehca",
 929         .match_table = ehca_device_table,
 930         .probe       = ehca_probe,
 931         .remove      = ehca_remove,
 932         .driver      = {
 933                 .groups = ehca_drv_attr_groups,
 934         },
 935 };
 936
 937 void ehca_poll_eqs(unsigned long data)
 938 {
 939         struct ehca_shca *shca;
 940
 941         spin_lock(&shca_list_lock);
 942         list_for_each_entry(shca, &shca_list, shca_list) {
 943                 if (shca->eq.is_initialized) {
 944                         /* call deadman proc only if eq ptr does not change */
 945                         struct ehca_eq *eq = &shca->eq;
 946                         int max = 3;
 947                         volatile u64 q_ofs, q_ofs2;
 948                         u64 flags;
 949                         spin_lock_irqsave(&eq->spinlock, flags);
 950                         q_ofs = eq->ipz_queue.current_q_offset;
 951                         spin_unlock_irqrestore(&eq->spinlock, flags);
 952                         do {
 953                                 spin_lock_irqsave(&eq->spinlock, flags);
 954                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 955                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 956                                 max--;
 957                         } while (q_ofs == q_ofs2 && max > 0);
 958                         if (q_ofs == q_ofs2)
 959                                 ehca_process_eq(shca, 0);
 960                 }
 961         }
 962         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
 963         spin_unlock(&shca_list_lock);
 964 }
 965
 966 static int __init ehca_module_init(void)
 967 {
 968         int ret;
 969
 970         printk(KERN_INFO "eHCA Infiniband Device Driver "
 971                "(Version " HCAD_VERSION ")\n");
 972
 973         ret = ehca_create_comp_pool();
 974         if (ret) {
 975                 ehca_gen_err("Cannot create comp pool.");
 976                 return ret;
 977         }
 978
 979         ret = ehca_create_slab_caches();
 980         if (ret) {
 981                 ehca_gen_err("Cannot create SLAB caches");
 982                 ret = -ENOMEM;
 983                 goto module_init1;
 984         }
 985
 986         ret = ibmebus_register_driver(&ehca_driver);
 987         if (ret) {
 988                 ehca_gen_err("Cannot register eHCA device driver");
 989                 ret = -EINVAL;
 990                 goto module_init2;
 991         }
 992
 993         if (ehca_poll_all_eqs != 1) {
 994                 ehca_gen_err("WARNING!!!");
 995                 ehca_gen_err("It is possible to lose interrupts.");
 996         } else {
 997                 init_timer(&poll_eqs_timer);
 998                 poll_eqs_timer.function = ehca_poll_eqs;
 999                 poll_eqs_timer.expires = jiffies + HZ;
1000                 add_timer(&poll_eqs_timer);
1001         }
1002
1003         return 0;
1004
1005 module_init2:
1006         ehca_destroy_slab_caches();
1007
1008 module_init1:
1009         ehca_destroy_comp_pool();
1010         return ret;
1011 };
1012
1013 static void __exit ehca_module_exit(void)
1014 {
1015         if (ehca_poll_all_eqs == 1)
1016                 del_timer_sync(&poll_eqs_timer);
1017
1018         ibmebus_unregister_driver(&ehca_driver);
1019
1020         ehca_destroy_slab_caches();
1021
1022         ehca_destroy_comp_pool();
1023
1024         idr_destroy(&ehca_cq_idr);
1025         idr_destroy(&ehca_qp_idr);
1026 };
1027
1028 module_init(ehca_module_init);
1029 module_exit(ehca_module_exit);