drivers/infiniband/hw/ehca/ehca_main.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  module start stop, hca detection
   5  *
   6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   8  *           Joachim Fenkes <fenkes@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 #ifdef CONFIG_PPC_64K_PAGES
  44 #include <linux/slab.h>
  45 #endif
  46 #include "ehca_classes.h"
  47 #include "ehca_iverbs.h"
  48 #include "ehca_mrmw.h"
  49 #include "ehca_tools.h"
  50 #include "hcp_if.h"
  51
  52 MODULE_LICENSE("Dual BSD/GPL");
  53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  54 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  55 MODULE_VERSION("SVNEHCA_0023");
  56
  57 int ehca_open_aqp1     = 0;
  58 int ehca_debug_level   = 0;
  59 int ehca_hw_level      = 0;
  60 int ehca_nr_ports      = 2;
  61 int ehca_use_hp_mr     = 0;
  62 int ehca_port_act_time = 30;
  63 int ehca_poll_all_eqs  = 1;
  64 int ehca_static_rate   = -1;
  65 int ehca_scaling_code  = 0;
  66
  67 module_param_named(open_aqp1,     ehca_open_aqp1,     int, 0);
  68 module_param_named(debug_level,   ehca_debug_level,   int, 0);
  69 module_param_named(hw_level,      ehca_hw_level,      int, 0);
  70 module_param_named(nr_ports,      ehca_nr_ports,      int, 0);
  71 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, 0);
  72 module_param_named(port_act_time, ehca_port_act_time, int, 0);
  73 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, 0);
  74 module_param_named(static_rate,   ehca_static_rate,   int, 0);
  75 module_param_named(scaling_code,   ehca_scaling_code,   int, 0);
  76
  77 MODULE_PARM_DESC(open_aqp1,
  78                  "AQP1 on startup (0: no (default), 1: yes)");
  79 MODULE_PARM_DESC(debug_level,
  80                  "debug level"
  81                  " (0: no debug traces (default), 1: with debug traces)");
  82 MODULE_PARM_DESC(hw_level,
  83                  "hardware level"
  84                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  85 MODULE_PARM_DESC(nr_ports,
  86                  "number of connected ports (default: 2)");
  87 MODULE_PARM_DESC(use_hp_mr,
  88                  "high performance MRs (0: no (default), 1: yes)");
  89 MODULE_PARM_DESC(port_act_time,
  90                  "time to wait for port activation (default: 30 sec)");
  91 MODULE_PARM_DESC(poll_all_eqs,
  92                  "polls all event queues periodically"
  93                  " (0: no, 1: yes (default))");
  94 MODULE_PARM_DESC(static_rate,
  95                  "set permanent static rate (default: disabled)");
  96 MODULE_PARM_DESC(scaling_code,
  97                  "set scaling code (0: disabled, 1: enabled/default)");
  98
  99 spinlock_t ehca_qp_idr_lock;
 100 spinlock_t ehca_cq_idr_lock;
 101 spinlock_t hcall_lock;
 102 DEFINE_IDR(ehca_qp_idr);
 103 DEFINE_IDR(ehca_cq_idr);
 104
 105
 106 static struct list_head shca_list; /* list of all registered ehcas */
 107 static spinlock_t shca_list_lock;
 108
 109 static struct timer_list poll_eqs_timer;
 110
 111 #ifdef CONFIG_PPC_64K_PAGES
 112 static struct kmem_cache *ctblk_cache = NULL;
 113
 114 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 115 {
 116         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 117         if (!ret)
 118                 ehca_gen_err("Out of memory for ctblk");
 119         return ret;
 120 }
 121
 122 void ehca_free_fw_ctrlblock(void *ptr)
 123 {
 124         if (ptr)
 125                 kmem_cache_free(ctblk_cache, ptr);
 126
 127 }
 128 #endif
 129
 130 static int ehca_create_slab_caches(void)
 131 {
 132         int ret;
 133
 134         ret = ehca_init_pd_cache();
 135         if (ret) {
 136                 ehca_gen_err("Cannot create PD SLAB cache.");
 137                 return ret;
 138         }
 139
 140         ret = ehca_init_cq_cache();
 141         if (ret) {
 142                 ehca_gen_err("Cannot create CQ SLAB cache.");
 143                 goto create_slab_caches2;
 144         }
 145
 146         ret = ehca_init_qp_cache();
 147         if (ret) {
 148                 ehca_gen_err("Cannot create QP SLAB cache.");
 149                 goto create_slab_caches3;
 150         }
 151
 152         ret = ehca_init_av_cache();
 153         if (ret) {
 154                 ehca_gen_err("Cannot create AV SLAB cache.");
 155                 goto create_slab_caches4;
 156         }
 157
 158         ret = ehca_init_mrmw_cache();
 159         if (ret) {
 160                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 161                 goto create_slab_caches5;
 162         }
 163
 164 #ifdef CONFIG_PPC_64K_PAGES
 165         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 166                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 167                                         SLAB_HWCACHE_ALIGN,
 168                                         NULL, NULL);
 169         if (!ctblk_cache) {
 170                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 171                 ehca_cleanup_mrmw_cache();
 172                 goto create_slab_caches5;
 173         }
 174 #endif
 175         return 0;
 176
 177 create_slab_caches5:
 178         ehca_cleanup_av_cache();
 179
 180 create_slab_caches4:
 181         ehca_cleanup_qp_cache();
 182
 183 create_slab_caches3:
 184         ehca_cleanup_cq_cache();
 185
 186 create_slab_caches2:
 187         ehca_cleanup_pd_cache();
 188
 189         return ret;
 190 }
 191
 192 static void ehca_destroy_slab_caches(void)
 193 {
 194         ehca_cleanup_mrmw_cache();
 195         ehca_cleanup_av_cache();
 196         ehca_cleanup_qp_cache();
 197         ehca_cleanup_cq_cache();
 198         ehca_cleanup_pd_cache();
 199 #ifdef CONFIG_PPC_64K_PAGES
 200         if (ctblk_cache)
 201                 kmem_cache_destroy(ctblk_cache);
 202 #endif
 203 }
 204
 205 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32,39)
 206 #define EHCA_REVID    EHCA_BMASK_IBM(40,63)
 207
 208 int ehca_sense_attributes(struct ehca_shca *shca)
 209 {
 210         int ret = 0;
 211         u64 h_ret;
 212         struct hipz_query_hca *rblock;
 213
 214         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 215         if (!rblock) {
 216                 ehca_gen_err("Cannot allocate rblock memory.");
 217                 return -ENOMEM;
 218         }
 219
 220         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 221         if (h_ret != H_SUCCESS) {
 222                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
 223                              h_ret);
 224                 ret = -EPERM;
 225                 goto num_ports1;
 226         }
 227
 228         if (ehca_nr_ports == 1)
 229                 shca->num_ports = 1;
 230         else
 231                 shca->num_ports = (u8)rblock->num_ports;
 232
 233         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 234
 235         if (ehca_hw_level == 0) {
 236                 u32 hcaaver;
 237                 u32 revid;
 238
 239                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 240                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 241
 242                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 243
 244                 if ((hcaaver == 1) && (revid == 0))
 245                         shca->hw_level = 0;
 246                 else if ((hcaaver == 1) && (revid == 1))
 247                         shca->hw_level = 1;
 248                 else if ((hcaaver == 1) && (revid == 2))
 249                         shca->hw_level = 2;
 250         }
 251         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 252
 253         shca->sport[0].rate = IB_RATE_30_GBPS;
 254         shca->sport[1].rate = IB_RATE_30_GBPS;
 255
 256 num_ports1:
 257         ehca_free_fw_ctrlblock(rblock);
 258         return ret;
 259 }
 260
 261 static int init_node_guid(struct ehca_shca *shca)
 262 {
 263         int ret = 0;
 264         struct hipz_query_hca *rblock;
 265
 266         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 267         if (!rblock) {
 268                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 269                 return -ENOMEM;
 270         }
 271
 272         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 273                 ehca_err(&shca->ib_device, "Can't query device properties");
 274                 ret = -EINVAL;
 275                 goto init_node_guid1;
 276         }
 277
 278         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 279
 280 init_node_guid1:
 281         ehca_free_fw_ctrlblock(rblock);
 282         return ret;
 283 }
 284
 285 int ehca_init_device(struct ehca_shca *shca)
 286 {
 287         int ret;
 288
 289         ret = init_node_guid(shca);
 290         if (ret)
 291                 return ret;
 292
 293         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 294         shca->ib_device.owner               = THIS_MODULE;
 295
 296         shca->ib_device.uverbs_abi_ver      = 6;
 297         shca->ib_device.uverbs_cmd_mask     =
 298                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 299                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 300                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 301                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 302                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 303                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 304                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 305                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 306                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 307                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 308                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 309                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 310                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 311                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 312                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 313                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 314
 315         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 316         shca->ib_device.phys_port_cnt       = shca->num_ports;
 317         shca->ib_device.num_comp_vectors    = 1;
 318         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 319         shca->ib_device.query_device        = ehca_query_device;
 320         shca->ib_device.query_port          = ehca_query_port;
 321         shca->ib_device.query_gid           = ehca_query_gid;
 322         shca->ib_device.query_pkey          = ehca_query_pkey;
 323         /* shca->in_device.modify_device    = ehca_modify_device    */
 324         shca->ib_device.modify_port         = ehca_modify_port;
 325         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 326         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 327         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 328         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 329         shca->ib_device.create_ah           = ehca_create_ah;
 330         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 331         shca->ib_device.query_ah            = ehca_query_ah;
 332         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 333         shca->ib_device.create_qp           = ehca_create_qp;
 334         shca->ib_device.modify_qp           = ehca_modify_qp;
 335         shca->ib_device.query_qp            = ehca_query_qp;
 336         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 337         shca->ib_device.post_send           = ehca_post_send;
 338         shca->ib_device.post_recv           = ehca_post_recv;
 339         shca->ib_device.create_cq           = ehca_create_cq;
 340         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 341         shca->ib_device.resize_cq           = ehca_resize_cq;
 342         shca->ib_device.poll_cq             = ehca_poll_cq;
 343         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 344         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 345         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 346         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 347         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 348         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 349         shca->ib_device.query_mr            = ehca_query_mr;
 350         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 351         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 352         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 353         shca->ib_device.bind_mw             = ehca_bind_mw;
 354         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 355         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 356         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 357         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 358         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 359         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 360         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 361         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 362         shca->ib_device.mmap                = ehca_mmap;
 363
 364         return ret;
 365 }
 366
 367 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 368 {
 369         struct ehca_sport *sport = &shca->sport[port - 1];
 370         struct ib_cq *ibcq;
 371         struct ib_qp *ibqp;
 372         struct ib_qp_init_attr qp_init_attr;
 373         int ret;
 374
 375         if (sport->ibcq_aqp1) {
 376                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 377                 return -EPERM;
 378         }
 379
 380         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
 381         if (IS_ERR(ibcq)) {
 382                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 383                 return PTR_ERR(ibcq);
 384         }
 385         sport->ibcq_aqp1 = ibcq;
 386
 387         if (sport->ibqp_aqp1) {
 388                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 389                 ret = -EPERM;
 390                 goto create_aqp1;
 391         }
 392
 393         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 394         qp_init_attr.send_cq          = ibcq;
 395         qp_init_attr.recv_cq          = ibcq;
 396         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 397         qp_init_attr.cap.max_send_wr  = 100;
 398         qp_init_attr.cap.max_recv_wr  = 100;
 399         qp_init_attr.cap.max_send_sge = 2;
 400         qp_init_attr.cap.max_recv_sge = 1;
 401         qp_init_attr.qp_type          = IB_QPT_GSI;
 402         qp_init_attr.port_num         = port;
 403         qp_init_attr.qp_context       = NULL;
 404         qp_init_attr.event_handler    = NULL;
 405         qp_init_attr.srq              = NULL;
 406
 407         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 408         if (IS_ERR(ibqp)) {
 409                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 410                 ret = PTR_ERR(ibqp);
 411                 goto create_aqp1;
 412         }
 413         sport->ibqp_aqp1 = ibqp;
 414
 415         return 0;
 416
 417 create_aqp1:
 418         ib_destroy_cq(sport->ibcq_aqp1);
 419         return ret;
 420 }
 421
 422 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 423 {
 424         int ret;
 425
 426         ret = ib_destroy_qp(sport->ibqp_aqp1);
 427         if (ret) {
 428                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
 429                 return ret;
 430         }
 431
 432         ret = ib_destroy_cq(sport->ibcq_aqp1);
 433         if (ret)
 434                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
 435
 436         return ret;
 437 }
 438
 439 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 440 {
 441         return snprintf(buf, PAGE_SIZE, "%d\n",
 442                         ehca_debug_level);
 443 }
 444
 445 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 446                                       const char *buf, size_t count)
 447 {
 448         int value = (*buf) - '0';
 449         if (value >= 0 && value <= 9)
 450                 ehca_debug_level = value;
 451         return 1;
 452 }
 453
 454 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 455             ehca_show_debug_level, ehca_store_debug_level);
 456
 457 static struct attribute *ehca_drv_attrs[] = {
 458         &driver_attr_debug_level.attr,
 459         NULL
 460 };
 461
 462 static struct attribute_group ehca_drv_attr_grp = {
 463         .attrs = ehca_drv_attrs
 464 };
 465
 466 #define EHCA_RESOURCE_ATTR(name)                                           \
 467 static ssize_t  ehca_show_##name(struct device *dev,                       \
 468                                  struct device_attribute *attr,            \
 469                                  char *buf)                                \
 470 {                                                                          \
 471         struct ehca_shca *shca;                                            \
 472         struct hipz_query_hca *rblock;                                     \
 473         int data;                                                          \
 474                                                                            \
 475         shca = dev->driver_data;                                           \
 476                                                                            \
 477         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 478         if (!rblock) {                                                     \
 479                 dev_err(dev, "Can't allocate rblock memory.");             \
 480                 return 0;                                                  \
 481         }                                                                  \
 482                                                                            \
 483         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 484                 dev_err(dev, "Can't query device properties");             \
 485                 ehca_free_fw_ctrlblock(rblock);                            \
 486                 return 0;                                                  \
 487         }                                                                  \
 488                                                                            \
 489         data = rblock->name;                                               \
 490         ehca_free_fw_ctrlblock(rblock);                                    \
 491                                                                            \
 492         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 493                 return snprintf(buf, 256, "1\n");                          \
 494         else                                                               \
 495                 return snprintf(buf, 256, "%d\n", data);                   \
 496                                                                            \
 497 }                                                                          \
 498 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 499
 500 EHCA_RESOURCE_ATTR(num_ports);
 501 EHCA_RESOURCE_ATTR(hw_ver);
 502 EHCA_RESOURCE_ATTR(max_eq);
 503 EHCA_RESOURCE_ATTR(cur_eq);
 504 EHCA_RESOURCE_ATTR(max_cq);
 505 EHCA_RESOURCE_ATTR(cur_cq);
 506 EHCA_RESOURCE_ATTR(max_qp);
 507 EHCA_RESOURCE_ATTR(cur_qp);
 508 EHCA_RESOURCE_ATTR(max_mr);
 509 EHCA_RESOURCE_ATTR(cur_mr);
 510 EHCA_RESOURCE_ATTR(max_mw);
 511 EHCA_RESOURCE_ATTR(cur_mw);
 512 EHCA_RESOURCE_ATTR(max_pd);
 513 EHCA_RESOURCE_ATTR(max_ah);
 514
 515 static ssize_t ehca_show_adapter_handle(struct device *dev,
 516                                         struct device_attribute *attr,
 517                                         char *buf)
 518 {
 519         struct ehca_shca *shca = dev->driver_data;
 520
 521         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 522
 523 }
 524 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 525
 526 static struct attribute *ehca_dev_attrs[] = {
 527         &dev_attr_adapter_handle.attr,
 528         &dev_attr_num_ports.attr,
 529         &dev_attr_hw_ver.attr,
 530         &dev_attr_max_eq.attr,
 531         &dev_attr_cur_eq.attr,
 532         &dev_attr_max_cq.attr,
 533         &dev_attr_cur_cq.attr,
 534         &dev_attr_max_qp.attr,
 535         &dev_attr_cur_qp.attr,
 536         &dev_attr_max_mr.attr,
 537         &dev_attr_cur_mr.attr,
 538         &dev_attr_max_mw.attr,
 539         &dev_attr_cur_mw.attr,
 540         &dev_attr_max_pd.attr,
 541         &dev_attr_max_ah.attr,
 542         NULL
 543 };
 544
 545 static struct attribute_group ehca_dev_attr_grp = {
 546         .attrs = ehca_dev_attrs
 547 };
 548
 549 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 550                                 const struct of_device_id *id)
 551 {
 552         struct ehca_shca *shca;
 553         const u64 *handle;
 554         struct ib_pd *ibpd;
 555         int ret;
 556
 557         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 558         if (!handle) {
 559                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 560                              dev->ofdev.node->full_name);
 561                 return -ENODEV;
 562         }
 563
 564         if (!(*handle)) {
 565                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 566                              dev->ofdev.node->full_name);
 567                 return -ENODEV;
 568         }
 569
 570         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 571         if (!shca) {
 572                 ehca_gen_err("Cannot allocate shca memory.");
 573                 return -ENOMEM;
 574         }
 575         mutex_init(&shca->modify_mutex);
 576
 577         shca->ibmebus_dev = dev;
 578         shca->ipz_hca_handle.handle = *handle;
 579         dev->ofdev.dev.driver_data = shca;
 580
 581         ret = ehca_sense_attributes(shca);
 582         if (ret < 0) {
 583                 ehca_gen_err("Cannot sense eHCA attributes.");
 584                 goto probe1;
 585         }
 586
 587         ret = ehca_init_device(shca);
 588         if (ret) {
 589                 ehca_gen_err("Cannot init ehca  device struct");
 590                 goto probe1;
 591         }
 592
 593         /* create event queues */
 594         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 595         if (ret) {
 596                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 597                 goto probe1;
 598         }
 599
 600         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 601         if (ret) {
 602                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 603                 goto probe3;
 604         }
 605
 606         /* create internal protection domain */
 607         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
 608         if (IS_ERR(ibpd)) {
 609                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 610                 ret = PTR_ERR(ibpd);
 611                 goto probe4;
 612         }
 613
 614         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 615         shca->pd->ib_pd.device = &shca->ib_device;
 616
 617         /* create internal max MR */
 618         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 619
 620         if (ret) {
 621                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
 622                          ret);
 623                 goto probe5;
 624         }
 625
 626         ret = ib_register_device(&shca->ib_device);
 627         if (ret) {
 628                 ehca_err(&shca->ib_device,
 629                          "ib_register_device() failed ret=%x", ret);
 630                 goto probe6;
 631         }
 632
 633         /* create AQP1 for port 1 */
 634         if (ehca_open_aqp1 == 1) {
 635                 shca->sport[0].port_state = IB_PORT_DOWN;
 636                 ret = ehca_create_aqp1(shca, 1);
 637                 if (ret) {
 638                         ehca_err(&shca->ib_device,
 639                                  "Cannot create AQP1 for port 1.");
 640                         goto probe7;
 641                 }
 642         }
 643
 644         /* create AQP1 for port 2 */
 645         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 646                 shca->sport[1].port_state = IB_PORT_DOWN;
 647                 ret = ehca_create_aqp1(shca, 2);
 648                 if (ret) {
 649                         ehca_err(&shca->ib_device,
 650                                  "Cannot create AQP1 for port 2.");
 651                         goto probe8;
 652                 }
 653         }
 654
 655         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 656         if (ret) /* only complain; we can live without attributes */
 657                 ehca_err(&shca->ib_device,
 658                          "Cannot create device attributes  ret=%d", ret);
 659
 660         spin_lock(&shca_list_lock);
 661         list_add(&shca->shca_list, &shca_list);
 662         spin_unlock(&shca_list_lock);
 663
 664         return 0;
 665
 666 probe8:
 667         ret = ehca_destroy_aqp1(&shca->sport[0]);
 668         if (ret)
 669                 ehca_err(&shca->ib_device,
 670                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
 671
 672 probe7:
 673         ib_unregister_device(&shca->ib_device);
 674
 675 probe6:
 676         ret = ehca_dereg_internal_maxmr(shca);
 677         if (ret)
 678                 ehca_err(&shca->ib_device,
 679                          "Cannot destroy internal MR. ret=%x", ret);
 680
 681 probe5:
 682         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 683         if (ret)
 684                 ehca_err(&shca->ib_device,
 685                          "Cannot destroy internal PD. ret=%x", ret);
 686
 687 probe4:
 688         ret = ehca_destroy_eq(shca, &shca->neq);
 689         if (ret)
 690                 ehca_err(&shca->ib_device,
 691                          "Cannot destroy NEQ. ret=%x", ret);
 692
 693 probe3:
 694         ret = ehca_destroy_eq(shca, &shca->eq);
 695         if (ret)
 696                 ehca_err(&shca->ib_device,
 697                          "Cannot destroy EQ. ret=%x", ret);
 698
 699 probe1:
 700         ib_dealloc_device(&shca->ib_device);
 701
 702         return -EINVAL;
 703 }
 704
 705 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 706 {
 707         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 708         int ret;
 709
 710         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 711
 712         if (ehca_open_aqp1 == 1) {
 713                 int i;
 714                 for (i = 0; i < shca->num_ports; i++) {
 715                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 716                         if (ret)
 717                                 ehca_err(&shca->ib_device,
 718                                          "Cannot destroy AQP1 for port %x "
 719                                          "ret=%x", ret, i);
 720                 }
 721         }
 722
 723         ib_unregister_device(&shca->ib_device);
 724
 725         ret = ehca_dereg_internal_maxmr(shca);
 726         if (ret)
 727                 ehca_err(&shca->ib_device,
 728                          "Cannot destroy internal MR. ret=%x", ret);
 729
 730         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 731         if (ret)
 732                 ehca_err(&shca->ib_device,
 733                          "Cannot destroy internal PD. ret=%x", ret);
 734
 735         ret = ehca_destroy_eq(shca, &shca->eq);
 736         if (ret)
 737                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
 738
 739         ret = ehca_destroy_eq(shca, &shca->neq);
 740         if (ret)
 741                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
 742
 743         ib_dealloc_device(&shca->ib_device);
 744
 745         spin_lock(&shca_list_lock);
 746         list_del(&shca->shca_list);
 747         spin_unlock(&shca_list_lock);
 748
 749         return ret;
 750 }
 751
 752 static struct of_device_id ehca_device_table[] =
 753 {
 754         {
 755                 .name       = "lhca",
 756                 .compatible = "IBM,lhca",
 757         },
 758         {},
 759 };
 760
 761 static struct ibmebus_driver ehca_driver = {
 762         .name     = "ehca",
 763         .id_table = ehca_device_table,
 764         .probe    = ehca_probe,
 765         .remove   = ehca_remove,
 766 };
 767
 768 void ehca_poll_eqs(unsigned long data)
 769 {
 770         struct ehca_shca *shca;
 771
 772         spin_lock(&shca_list_lock);
 773         list_for_each_entry(shca, &shca_list, shca_list) {
 774                 if (shca->eq.is_initialized) {
 775                         /* call deadman proc only if eq ptr does not change */
 776                         struct ehca_eq *eq = &shca->eq;
 777                         int max = 3;
 778                         volatile u64 q_ofs, q_ofs2;
 779                         u64 flags;
 780                         spin_lock_irqsave(&eq->spinlock, flags);
 781                         q_ofs = eq->ipz_queue.current_q_offset;
 782                         spin_unlock_irqrestore(&eq->spinlock, flags);
 783                         do {
 784                                 spin_lock_irqsave(&eq->spinlock, flags);
 785                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 786                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 787                                 max--;
 788                         } while (q_ofs == q_ofs2 && max > 0);
 789                         if (q_ofs == q_ofs2)
 790                                 ehca_process_eq(shca, 0);
 791                 }
 792         }
 793         mod_timer(&poll_eqs_timer, jiffies + HZ);
 794         spin_unlock(&shca_list_lock);
 795 }
 796
 797 int __init ehca_module_init(void)
 798 {
 799         int ret;
 800
 801         printk(KERN_INFO "eHCA Infiniband Device Driver "
 802                "(Rel.: SVNEHCA_0023)\n");
 803         idr_init(&ehca_qp_idr);
 804         idr_init(&ehca_cq_idr);
 805         spin_lock_init(&ehca_qp_idr_lock);
 806         spin_lock_init(&ehca_cq_idr_lock);
 807         spin_lock_init(&hcall_lock);
 808
 809         INIT_LIST_HEAD(&shca_list);
 810         spin_lock_init(&shca_list_lock);
 811
 812         if ((ret = ehca_create_comp_pool())) {
 813                 ehca_gen_err("Cannot create comp pool.");
 814                 return ret;
 815         }
 816
 817         if ((ret = ehca_create_slab_caches())) {
 818                 ehca_gen_err("Cannot create SLAB caches");
 819                 ret = -ENOMEM;
 820                 goto module_init1;
 821         }
 822
 823         if ((ret = ibmebus_register_driver(&ehca_driver))) {
 824                 ehca_gen_err("Cannot register eHCA device driver");
 825                 ret = -EINVAL;
 826                 goto module_init2;
 827         }
 828
 829         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 830         if (ret) /* only complain; we can live without attributes */
 831                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 832
 833         if (ehca_poll_all_eqs != 1) {
 834                 ehca_gen_err("WARNING!!!");
 835                 ehca_gen_err("It is possible to lose interrupts.");
 836         } else {
 837                 init_timer(&poll_eqs_timer);
 838                 poll_eqs_timer.function = ehca_poll_eqs;
 839                 poll_eqs_timer.expires = jiffies + HZ;
 840                 add_timer(&poll_eqs_timer);
 841         }
 842
 843         return 0;
 844
 845 module_init2:
 846         ehca_destroy_slab_caches();
 847
 848 module_init1:
 849         ehca_destroy_comp_pool();
 850         return ret;
 851 };
 852
 853 void __exit ehca_module_exit(void)
 854 {
 855         if (ehca_poll_all_eqs == 1)
 856                 del_timer_sync(&poll_eqs_timer);
 857
 858         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 859         ibmebus_unregister_driver(&ehca_driver);
 860
 861         ehca_destroy_slab_caches();
 862
 863         ehca_destroy_comp_pool();
 864
 865         idr_destroy(&ehca_cq_idr);
 866         idr_destroy(&ehca_qp_idr);
 867 };
 868
 869 module_init(ehca_module_init);
 870 module_exit(ehca_module_exit);