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_0022");
  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  = 1;
  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 DEFINE_IDR(ehca_qp_idr);
 102 DEFINE_IDR(ehca_cq_idr);
 103
 104
 105 static struct list_head shca_list; /* list of all registered ehcas */
 106 static spinlock_t shca_list_lock;
 107
 108 static struct timer_list poll_eqs_timer;
 109
 110 #ifdef CONFIG_PPC_64K_PAGES
 111 static struct kmem_cache *ctblk_cache = NULL;
 112
 113 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 114 {
 115         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 116         if (!ret)
 117                 ehca_gen_err("Out of memory for ctblk");
 118         return ret;
 119 }
 120
 121 void ehca_free_fw_ctrlblock(void *ptr)
 122 {
 123         if (ptr)
 124                 kmem_cache_free(ctblk_cache, ptr);
 125
 126 }
 127 #endif
 128
 129 static int ehca_create_slab_caches(void)
 130 {
 131         int ret;
 132
 133         ret = ehca_init_pd_cache();
 134         if (ret) {
 135                 ehca_gen_err("Cannot create PD SLAB cache.");
 136                 return ret;
 137         }
 138
 139         ret = ehca_init_cq_cache();
 140         if (ret) {
 141                 ehca_gen_err("Cannot create CQ SLAB cache.");
 142                 goto create_slab_caches2;
 143         }
 144
 145         ret = ehca_init_qp_cache();
 146         if (ret) {
 147                 ehca_gen_err("Cannot create QP SLAB cache.");
 148                 goto create_slab_caches3;
 149         }
 150
 151         ret = ehca_init_av_cache();
 152         if (ret) {
 153                 ehca_gen_err("Cannot create AV SLAB cache.");
 154                 goto create_slab_caches4;
 155         }
 156
 157         ret = ehca_init_mrmw_cache();
 158         if (ret) {
 159                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 160                 goto create_slab_caches5;
 161         }
 162
 163 #ifdef CONFIG_PPC_64K_PAGES
 164         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 165                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 166                                         SLAB_HWCACHE_ALIGN,
 167                                         NULL, NULL);
 168         if (!ctblk_cache) {
 169                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 170                 ehca_cleanup_mrmw_cache();
 171                 goto create_slab_caches5;
 172         }
 173 #endif
 174         return 0;
 175
 176 create_slab_caches5:
 177         ehca_cleanup_av_cache();
 178
 179 create_slab_caches4:
 180         ehca_cleanup_qp_cache();
 181
 182 create_slab_caches3:
 183         ehca_cleanup_cq_cache();
 184
 185 create_slab_caches2:
 186         ehca_cleanup_pd_cache();
 187
 188         return ret;
 189 }
 190
 191 static void ehca_destroy_slab_caches(void)
 192 {
 193         ehca_cleanup_mrmw_cache();
 194         ehca_cleanup_av_cache();
 195         ehca_cleanup_qp_cache();
 196         ehca_cleanup_cq_cache();
 197         ehca_cleanup_pd_cache();
 198 #ifdef CONFIG_PPC_64K_PAGES
 199         if (ctblk_cache)
 200                 kmem_cache_destroy(ctblk_cache);
 201 #endif
 202 }
 203
 204 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32,39)
 205 #define EHCA_REVID    EHCA_BMASK_IBM(40,63)
 206
 207 int ehca_sense_attributes(struct ehca_shca *shca)
 208 {
 209         int ret = 0;
 210         u64 h_ret;
 211         struct hipz_query_hca *rblock;
 212
 213         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 214         if (!rblock) {
 215                 ehca_gen_err("Cannot allocate rblock memory.");
 216                 return -ENOMEM;
 217         }
 218
 219         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 220         if (h_ret != H_SUCCESS) {
 221                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
 222                              h_ret);
 223                 ret = -EPERM;
 224                 goto num_ports1;
 225         }
 226
 227         if (ehca_nr_ports == 1)
 228                 shca->num_ports = 1;
 229         else
 230                 shca->num_ports = (u8)rblock->num_ports;
 231
 232         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 233
 234         if (ehca_hw_level == 0) {
 235                 u32 hcaaver;
 236                 u32 revid;
 237
 238                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 239                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 240
 241                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 242
 243                 if ((hcaaver == 1) && (revid == 0))
 244                         shca->hw_level = 0;
 245                 else if ((hcaaver == 1) && (revid == 1))
 246                         shca->hw_level = 1;
 247                 else if ((hcaaver == 1) && (revid == 2))
 248                         shca->hw_level = 2;
 249         }
 250         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 251
 252         shca->sport[0].rate = IB_RATE_30_GBPS;
 253         shca->sport[1].rate = IB_RATE_30_GBPS;
 254
 255 num_ports1:
 256         ehca_free_fw_ctrlblock(rblock);
 257         return ret;
 258 }
 259
 260 static int init_node_guid(struct ehca_shca *shca)
 261 {
 262         int ret = 0;
 263         struct hipz_query_hca *rblock;
 264
 265         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 266         if (!rblock) {
 267                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 268                 return -ENOMEM;
 269         }
 270
 271         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 272                 ehca_err(&shca->ib_device, "Can't query device properties");
 273                 ret = -EINVAL;
 274                 goto init_node_guid1;
 275         }
 276
 277         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 278
 279 init_node_guid1:
 280         ehca_free_fw_ctrlblock(rblock);
 281         return ret;
 282 }
 283
 284 int ehca_init_device(struct ehca_shca *shca)
 285 {
 286         int ret;
 287
 288         ret = init_node_guid(shca);
 289         if (ret)
 290                 return ret;
 291
 292         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 293         shca->ib_device.owner               = THIS_MODULE;
 294
 295         shca->ib_device.uverbs_abi_ver      = 6;
 296         shca->ib_device.uverbs_cmd_mask     =
 297                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 298                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 299                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 300                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 301                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 302                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 303                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 304                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 305                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 306                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 307                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 308                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 309                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 310                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 311                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 312                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 313
 314         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 315         shca->ib_device.phys_port_cnt       = shca->num_ports;
 316         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 317         shca->ib_device.query_device        = ehca_query_device;
 318         shca->ib_device.query_port          = ehca_query_port;
 319         shca->ib_device.query_gid           = ehca_query_gid;
 320         shca->ib_device.query_pkey          = ehca_query_pkey;
 321         /* shca->in_device.modify_device    = ehca_modify_device    */
 322         shca->ib_device.modify_port         = ehca_modify_port;
 323         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 324         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 325         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 326         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 327         shca->ib_device.create_ah           = ehca_create_ah;
 328         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 329         shca->ib_device.query_ah            = ehca_query_ah;
 330         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 331         shca->ib_device.create_qp           = ehca_create_qp;
 332         shca->ib_device.modify_qp           = ehca_modify_qp;
 333         shca->ib_device.query_qp            = ehca_query_qp;
 334         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 335         shca->ib_device.post_send           = ehca_post_send;
 336         shca->ib_device.post_recv           = ehca_post_recv;
 337         shca->ib_device.create_cq           = ehca_create_cq;
 338         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 339         shca->ib_device.resize_cq           = ehca_resize_cq;
 340         shca->ib_device.poll_cq             = ehca_poll_cq;
 341         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 342         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 343         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 344         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 345         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 346         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 347         shca->ib_device.query_mr            = ehca_query_mr;
 348         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 349         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 350         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 351         shca->ib_device.bind_mw             = ehca_bind_mw;
 352         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 353         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 354         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 355         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 356         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 357         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 358         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 359         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 360         shca->ib_device.mmap                = ehca_mmap;
 361
 362         return ret;
 363 }
 364
 365 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 366 {
 367         struct ehca_sport *sport = &shca->sport[port - 1];
 368         struct ib_cq *ibcq;
 369         struct ib_qp *ibqp;
 370         struct ib_qp_init_attr qp_init_attr;
 371         int ret;
 372
 373         if (sport->ibcq_aqp1) {
 374                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 375                 return -EPERM;
 376         }
 377
 378         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10);
 379         if (IS_ERR(ibcq)) {
 380                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 381                 return PTR_ERR(ibcq);
 382         }
 383         sport->ibcq_aqp1 = ibcq;
 384
 385         if (sport->ibqp_aqp1) {
 386                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 387                 ret = -EPERM;
 388                 goto create_aqp1;
 389         }
 390
 391         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 392         qp_init_attr.send_cq          = ibcq;
 393         qp_init_attr.recv_cq          = ibcq;
 394         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 395         qp_init_attr.cap.max_send_wr  = 100;
 396         qp_init_attr.cap.max_recv_wr  = 100;
 397         qp_init_attr.cap.max_send_sge = 2;
 398         qp_init_attr.cap.max_recv_sge = 1;
 399         qp_init_attr.qp_type          = IB_QPT_GSI;
 400         qp_init_attr.port_num         = port;
 401         qp_init_attr.qp_context       = NULL;
 402         qp_init_attr.event_handler    = NULL;
 403         qp_init_attr.srq              = NULL;
 404
 405         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 406         if (IS_ERR(ibqp)) {
 407                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 408                 ret = PTR_ERR(ibqp);
 409                 goto create_aqp1;
 410         }
 411         sport->ibqp_aqp1 = ibqp;
 412
 413         return 0;
 414
 415 create_aqp1:
 416         ib_destroy_cq(sport->ibcq_aqp1);
 417         return ret;
 418 }
 419
 420 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 421 {
 422         int ret;
 423
 424         ret = ib_destroy_qp(sport->ibqp_aqp1);
 425         if (ret) {
 426                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
 427                 return ret;
 428         }
 429
 430         ret = ib_destroy_cq(sport->ibcq_aqp1);
 431         if (ret)
 432                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
 433
 434         return ret;
 435 }
 436
 437 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 438 {
 439         return snprintf(buf, PAGE_SIZE, "%d\n",
 440                         ehca_debug_level);
 441 }
 442
 443 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 444                                       const char *buf, size_t count)
 445 {
 446         int value = (*buf) - '0';
 447         if (value >= 0 && value <= 9)
 448                 ehca_debug_level = value;
 449         return 1;
 450 }
 451
 452 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 453             ehca_show_debug_level, ehca_store_debug_level);
 454
 455 void ehca_create_driver_sysfs(struct ibmebus_driver *drv)
 456 {
 457         driver_create_file(&drv->driver, &driver_attr_debug_level);
 458 }
 459
 460 void ehca_remove_driver_sysfs(struct ibmebus_driver *drv)
 461 {
 462         driver_remove_file(&drv->driver, &driver_attr_debug_level);
 463 }
 464
 465 #define EHCA_RESOURCE_ATTR(name)                                           \
 466 static ssize_t  ehca_show_##name(struct device *dev,                       \
 467                                  struct device_attribute *attr,            \
 468                                  char *buf)                                \
 469 {                                                                          \
 470         struct ehca_shca *shca;                                            \
 471         struct hipz_query_hca *rblock;                                     \
 472         int data;                                                          \
 473                                                                            \
 474         shca = dev->driver_data;                                           \
 475                                                                            \
 476         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 477         if (!rblock) {                                                     \
 478                 dev_err(dev, "Can't allocate rblock memory.");             \
 479                 return 0;                                                  \
 480         }                                                                  \
 481                                                                            \
 482         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 483                 dev_err(dev, "Can't query device properties");             \
 484                 ehca_free_fw_ctrlblock(rblock);                            \
 485                 return 0;                                                  \
 486         }                                                                  \
 487                                                                            \
 488         data = rblock->name;                                               \
 489         ehca_free_fw_ctrlblock(rblock);                                    \
 490                                                                            \
 491         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 492                 return snprintf(buf, 256, "1\n");                          \
 493         else                                                               \
 494                 return snprintf(buf, 256, "%d\n", data);                   \
 495                                                                            \
 496 }                                                                          \
 497 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 498
 499 EHCA_RESOURCE_ATTR(num_ports);
 500 EHCA_RESOURCE_ATTR(hw_ver);
 501 EHCA_RESOURCE_ATTR(max_eq);
 502 EHCA_RESOURCE_ATTR(cur_eq);
 503 EHCA_RESOURCE_ATTR(max_cq);
 504 EHCA_RESOURCE_ATTR(cur_cq);
 505 EHCA_RESOURCE_ATTR(max_qp);
 506 EHCA_RESOURCE_ATTR(cur_qp);
 507 EHCA_RESOURCE_ATTR(max_mr);
 508 EHCA_RESOURCE_ATTR(cur_mr);
 509 EHCA_RESOURCE_ATTR(max_mw);
 510 EHCA_RESOURCE_ATTR(cur_mw);
 511 EHCA_RESOURCE_ATTR(max_pd);
 512 EHCA_RESOURCE_ATTR(max_ah);
 513
 514 static ssize_t ehca_show_adapter_handle(struct device *dev,
 515                                         struct device_attribute *attr,
 516                                         char *buf)
 517 {
 518         struct ehca_shca *shca = dev->driver_data;
 519
 520         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 521
 522 }
 523 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 524
 525
 526 void ehca_create_device_sysfs(struct ibmebus_dev *dev)
 527 {
 528         device_create_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
 529         device_create_file(&dev->ofdev.dev, &dev_attr_num_ports);
 530         device_create_file(&dev->ofdev.dev, &dev_attr_hw_ver);
 531         device_create_file(&dev->ofdev.dev, &dev_attr_max_eq);
 532         device_create_file(&dev->ofdev.dev, &dev_attr_cur_eq);
 533         device_create_file(&dev->ofdev.dev, &dev_attr_max_cq);
 534         device_create_file(&dev->ofdev.dev, &dev_attr_cur_cq);
 535         device_create_file(&dev->ofdev.dev, &dev_attr_max_qp);
 536         device_create_file(&dev->ofdev.dev, &dev_attr_cur_qp);
 537         device_create_file(&dev->ofdev.dev, &dev_attr_max_mr);
 538         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mr);
 539         device_create_file(&dev->ofdev.dev, &dev_attr_max_mw);
 540         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mw);
 541         device_create_file(&dev->ofdev.dev, &dev_attr_max_pd);
 542         device_create_file(&dev->ofdev.dev, &dev_attr_max_ah);
 543 }
 544
 545 void ehca_remove_device_sysfs(struct ibmebus_dev *dev)
 546 {
 547         device_remove_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
 548         device_remove_file(&dev->ofdev.dev, &dev_attr_num_ports);
 549         device_remove_file(&dev->ofdev.dev, &dev_attr_hw_ver);
 550         device_remove_file(&dev->ofdev.dev, &dev_attr_max_eq);
 551         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_eq);
 552         device_remove_file(&dev->ofdev.dev, &dev_attr_max_cq);
 553         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_cq);
 554         device_remove_file(&dev->ofdev.dev, &dev_attr_max_qp);
 555         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_qp);
 556         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mr);
 557         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mr);
 558         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mw);
 559         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mw);
 560         device_remove_file(&dev->ofdev.dev, &dev_attr_max_pd);
 561         device_remove_file(&dev->ofdev.dev, &dev_attr_max_ah);
 562 }
 563
 564 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 565                                 const struct of_device_id *id)
 566 {
 567         struct ehca_shca *shca;
 568         u64 *handle;
 569         struct ib_pd *ibpd;
 570         int ret;
 571
 572         handle = (u64 *)get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 573         if (!handle) {
 574                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 575                              dev->ofdev.node->full_name);
 576                 return -ENODEV;
 577         }
 578
 579         if (!(*handle)) {
 580                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 581                              dev->ofdev.node->full_name);
 582                 return -ENODEV;
 583         }
 584
 585         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 586         if (!shca) {
 587                 ehca_gen_err("Cannot allocate shca memory.");
 588                 return -ENOMEM;
 589         }
 590         mutex_init(&shca->modify_mutex);
 591
 592         shca->ibmebus_dev = dev;
 593         shca->ipz_hca_handle.handle = *handle;
 594         dev->ofdev.dev.driver_data = shca;
 595
 596         ret = ehca_sense_attributes(shca);
 597         if (ret < 0) {
 598                 ehca_gen_err("Cannot sense eHCA attributes.");
 599                 goto probe1;
 600         }
 601
 602         ret = ehca_init_device(shca);
 603         if (ret) {
 604                 ehca_gen_err("Cannot init ehca  device struct");
 605                 goto probe1;
 606         }
 607
 608         /* create event queues */
 609         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 610         if (ret) {
 611                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 612                 goto probe1;
 613         }
 614
 615         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 616         if (ret) {
 617                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 618                 goto probe3;
 619         }
 620
 621         /* create internal protection domain */
 622         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
 623         if (IS_ERR(ibpd)) {
 624                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 625                 ret = PTR_ERR(ibpd);
 626                 goto probe4;
 627         }
 628
 629         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 630         shca->pd->ib_pd.device = &shca->ib_device;
 631
 632         /* create internal max MR */
 633         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 634
 635         if (ret) {
 636                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
 637                          ret);
 638                 goto probe5;
 639         }
 640
 641         ret = ib_register_device(&shca->ib_device);
 642         if (ret) {
 643                 ehca_err(&shca->ib_device,
 644                          "ib_register_device() failed ret=%x", ret);
 645                 goto probe6;
 646         }
 647
 648         /* create AQP1 for port 1 */
 649         if (ehca_open_aqp1 == 1) {
 650                 shca->sport[0].port_state = IB_PORT_DOWN;
 651                 ret = ehca_create_aqp1(shca, 1);
 652                 if (ret) {
 653                         ehca_err(&shca->ib_device,
 654                                  "Cannot create AQP1 for port 1.");
 655                         goto probe7;
 656                 }
 657         }
 658
 659         /* create AQP1 for port 2 */
 660         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 661                 shca->sport[1].port_state = IB_PORT_DOWN;
 662                 ret = ehca_create_aqp1(shca, 2);
 663                 if (ret) {
 664                         ehca_err(&shca->ib_device,
 665                                  "Cannot create AQP1 for port 2.");
 666                         goto probe8;
 667                 }
 668         }
 669
 670         ehca_create_device_sysfs(dev);
 671
 672         spin_lock(&shca_list_lock);
 673         list_add(&shca->shca_list, &shca_list);
 674         spin_unlock(&shca_list_lock);
 675
 676         return 0;
 677
 678 probe8:
 679         ret = ehca_destroy_aqp1(&shca->sport[0]);
 680         if (ret)
 681                 ehca_err(&shca->ib_device,
 682                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
 683
 684 probe7:
 685         ib_unregister_device(&shca->ib_device);
 686
 687 probe6:
 688         ret = ehca_dereg_internal_maxmr(shca);
 689         if (ret)
 690                 ehca_err(&shca->ib_device,
 691                          "Cannot destroy internal MR. ret=%x", ret);
 692
 693 probe5:
 694         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 695         if (ret)
 696                 ehca_err(&shca->ib_device,
 697                          "Cannot destroy internal PD. ret=%x", ret);
 698
 699 probe4:
 700         ret = ehca_destroy_eq(shca, &shca->neq);
 701         if (ret)
 702                 ehca_err(&shca->ib_device,
 703                          "Cannot destroy NEQ. ret=%x", ret);
 704
 705 probe3:
 706         ret = ehca_destroy_eq(shca, &shca->eq);
 707         if (ret)
 708                 ehca_err(&shca->ib_device,
 709                          "Cannot destroy EQ. ret=%x", ret);
 710
 711 probe1:
 712         ib_dealloc_device(&shca->ib_device);
 713
 714         return -EINVAL;
 715 }
 716
 717 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 718 {
 719         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 720         int ret;
 721
 722         ehca_remove_device_sysfs(dev);
 723
 724         if (ehca_open_aqp1 == 1) {
 725                 int i;
 726                 for (i = 0; i < shca->num_ports; i++) {
 727                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 728                         if (ret)
 729                                 ehca_err(&shca->ib_device,
 730                                          "Cannot destroy AQP1 for port %x "
 731                                          "ret=%x", ret, i);
 732                 }
 733         }
 734
 735         ib_unregister_device(&shca->ib_device);
 736
 737         ret = ehca_dereg_internal_maxmr(shca);
 738         if (ret)
 739                 ehca_err(&shca->ib_device,
 740                          "Cannot destroy internal MR. ret=%x", ret);
 741
 742         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 743         if (ret)
 744                 ehca_err(&shca->ib_device,
 745                          "Cannot destroy internal PD. ret=%x", ret);
 746
 747         ret = ehca_destroy_eq(shca, &shca->eq);
 748         if (ret)
 749                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
 750
 751         ret = ehca_destroy_eq(shca, &shca->neq);
 752         if (ret)
 753                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
 754
 755         ib_dealloc_device(&shca->ib_device);
 756
 757         spin_lock(&shca_list_lock);
 758         list_del(&shca->shca_list);
 759         spin_unlock(&shca_list_lock);
 760
 761         return ret;
 762 }
 763
 764 static struct of_device_id ehca_device_table[] =
 765 {
 766         {
 767                 .name       = "lhca",
 768                 .compatible = "IBM,lhca",
 769         },
 770         {},
 771 };
 772
 773 static struct ibmebus_driver ehca_driver = {
 774         .name     = "ehca",
 775         .id_table = ehca_device_table,
 776         .probe    = ehca_probe,
 777         .remove   = ehca_remove,
 778 };
 779
 780 void ehca_poll_eqs(unsigned long data)
 781 {
 782         struct ehca_shca *shca;
 783
 784         spin_lock(&shca_list_lock);
 785         list_for_each_entry(shca, &shca_list, shca_list) {
 786                 if (shca->eq.is_initialized) {
 787                         /* call deadman proc only if eq ptr does not change */
 788                         struct ehca_eq *eq = &shca->eq;
 789                         int max = 3;
 790                         volatile u64 q_ofs, q_ofs2;
 791                         u64 flags;
 792                         spin_lock_irqsave(&eq->spinlock, flags);
 793                         q_ofs = eq->ipz_queue.current_q_offset;
 794                         spin_unlock_irqrestore(&eq->spinlock, flags);
 795                         do {
 796                                 spin_lock_irqsave(&eq->spinlock, flags);
 797                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 798                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 799                                 max--;
 800                         } while (q_ofs == q_ofs2 && max > 0);
 801                         if (q_ofs == q_ofs2)
 802                                 ehca_process_eq(shca, 0);
 803                 }
 804         }
 805         mod_timer(&poll_eqs_timer, jiffies + HZ);
 806         spin_unlock(&shca_list_lock);
 807 }
 808
 809 int __init ehca_module_init(void)
 810 {
 811         int ret;
 812
 813         printk(KERN_INFO "eHCA Infiniband Device Driver "
 814                "(Rel.: SVNEHCA_0022)\n");
 815         idr_init(&ehca_qp_idr);
 816         idr_init(&ehca_cq_idr);
 817         spin_lock_init(&ehca_qp_idr_lock);
 818         spin_lock_init(&ehca_cq_idr_lock);
 819
 820         INIT_LIST_HEAD(&shca_list);
 821         spin_lock_init(&shca_list_lock);
 822
 823         if ((ret = ehca_create_comp_pool())) {
 824                 ehca_gen_err("Cannot create comp pool.");
 825                 return ret;
 826         }
 827
 828         if ((ret = ehca_create_slab_caches())) {
 829                 ehca_gen_err("Cannot create SLAB caches");
 830                 ret = -ENOMEM;
 831                 goto module_init1;
 832         }
 833
 834         if ((ret = ibmebus_register_driver(&ehca_driver))) {
 835                 ehca_gen_err("Cannot register eHCA device driver");
 836                 ret = -EINVAL;
 837                 goto module_init2;
 838         }
 839
 840         ehca_create_driver_sysfs(&ehca_driver);
 841
 842         if (ehca_poll_all_eqs != 1) {
 843                 ehca_gen_err("WARNING!!!");
 844                 ehca_gen_err("It is possible to lose interrupts.");
 845         } else {
 846                 init_timer(&poll_eqs_timer);
 847                 poll_eqs_timer.function = ehca_poll_eqs;
 848                 poll_eqs_timer.expires = jiffies + HZ;
 849                 add_timer(&poll_eqs_timer);
 850         }
 851
 852         return 0;
 853
 854 module_init2:
 855         ehca_destroy_slab_caches();
 856
 857 module_init1:
 858         ehca_destroy_comp_pool();
 859         return ret;
 860 };
 861
 862 void __exit ehca_module_exit(void)
 863 {
 864         if (ehca_poll_all_eqs == 1)
 865                 del_timer_sync(&poll_eqs_timer);
 866
 867         ehca_remove_driver_sysfs(&ehca_driver);
 868         ibmebus_unregister_driver(&ehca_driver);
 869
 870         ehca_destroy_slab_caches();
 871
 872         ehca_destroy_comp_pool();
 873
 874         idr_destroy(&ehca_cq_idr);
 875         idr_destroy(&ehca_qp_idr);
 876 };
 877
 878 module_init(ehca_module_init);
 879 module_exit(ehca_module_exit);