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.num_comp_vectors    = 1;
 317         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 318         shca->ib_device.query_device        = ehca_query_device;
 319         shca->ib_device.query_port          = ehca_query_port;
 320         shca->ib_device.query_gid           = ehca_query_gid;
 321         shca->ib_device.query_pkey          = ehca_query_pkey;
 322         /* shca->in_device.modify_device    = ehca_modify_device    */
 323         shca->ib_device.modify_port         = ehca_modify_port;
 324         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 325         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 326         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 327         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 328         shca->ib_device.create_ah           = ehca_create_ah;
 329         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 330         shca->ib_device.query_ah            = ehca_query_ah;
 331         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 332         shca->ib_device.create_qp           = ehca_create_qp;
 333         shca->ib_device.modify_qp           = ehca_modify_qp;
 334         shca->ib_device.query_qp            = ehca_query_qp;
 335         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 336         shca->ib_device.post_send           = ehca_post_send;
 337         shca->ib_device.post_recv           = ehca_post_recv;
 338         shca->ib_device.create_cq           = ehca_create_cq;
 339         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 340         shca->ib_device.resize_cq           = ehca_resize_cq;
 341         shca->ib_device.poll_cq             = ehca_poll_cq;
 342         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 343         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 344         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 345         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 346         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 347         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 348         shca->ib_device.query_mr            = ehca_query_mr;
 349         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 350         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 351         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 352         shca->ib_device.bind_mw             = ehca_bind_mw;
 353         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 354         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 355         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 356         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 357         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 358         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 359         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 360         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 361         shca->ib_device.mmap                = ehca_mmap;
 362
 363         return ret;
 364 }
 365
 366 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 367 {
 368         struct ehca_sport *sport = &shca->sport[port - 1];
 369         struct ib_cq *ibcq;
 370         struct ib_qp *ibqp;
 371         struct ib_qp_init_attr qp_init_attr;
 372         int ret;
 373
 374         if (sport->ibcq_aqp1) {
 375                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 376                 return -EPERM;
 377         }
 378
 379         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
 380         if (IS_ERR(ibcq)) {
 381                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 382                 return PTR_ERR(ibcq);
 383         }
 384         sport->ibcq_aqp1 = ibcq;
 385
 386         if (sport->ibqp_aqp1) {
 387                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 388                 ret = -EPERM;
 389                 goto create_aqp1;
 390         }
 391
 392         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 393         qp_init_attr.send_cq          = ibcq;
 394         qp_init_attr.recv_cq          = ibcq;
 395         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 396         qp_init_attr.cap.max_send_wr  = 100;
 397         qp_init_attr.cap.max_recv_wr  = 100;
 398         qp_init_attr.cap.max_send_sge = 2;
 399         qp_init_attr.cap.max_recv_sge = 1;
 400         qp_init_attr.qp_type          = IB_QPT_GSI;
 401         qp_init_attr.port_num         = port;
 402         qp_init_attr.qp_context       = NULL;
 403         qp_init_attr.event_handler    = NULL;
 404         qp_init_attr.srq              = NULL;
 405
 406         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 407         if (IS_ERR(ibqp)) {
 408                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 409                 ret = PTR_ERR(ibqp);
 410                 goto create_aqp1;
 411         }
 412         sport->ibqp_aqp1 = ibqp;
 413
 414         return 0;
 415
 416 create_aqp1:
 417         ib_destroy_cq(sport->ibcq_aqp1);
 418         return ret;
 419 }
 420
 421 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 422 {
 423         int ret;
 424
 425         ret = ib_destroy_qp(sport->ibqp_aqp1);
 426         if (ret) {
 427                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
 428                 return ret;
 429         }
 430
 431         ret = ib_destroy_cq(sport->ibcq_aqp1);
 432         if (ret)
 433                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
 434
 435         return ret;
 436 }
 437
 438 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 439 {
 440         return snprintf(buf, PAGE_SIZE, "%d\n",
 441                         ehca_debug_level);
 442 }
 443
 444 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 445                                       const char *buf, size_t count)
 446 {
 447         int value = (*buf) - '0';
 448         if (value >= 0 && value <= 9)
 449                 ehca_debug_level = value;
 450         return 1;
 451 }
 452
 453 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 454             ehca_show_debug_level, ehca_store_debug_level);
 455
 456 void ehca_create_driver_sysfs(struct ibmebus_driver *drv)
 457 {
 458         driver_create_file(&drv->driver, &driver_attr_debug_level);
 459 }
 460
 461 void ehca_remove_driver_sysfs(struct ibmebus_driver *drv)
 462 {
 463         driver_remove_file(&drv->driver, &driver_attr_debug_level);
 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
 527 void ehca_create_device_sysfs(struct ibmebus_dev *dev)
 528 {
 529         device_create_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
 530         device_create_file(&dev->ofdev.dev, &dev_attr_num_ports);
 531         device_create_file(&dev->ofdev.dev, &dev_attr_hw_ver);
 532         device_create_file(&dev->ofdev.dev, &dev_attr_max_eq);
 533         device_create_file(&dev->ofdev.dev, &dev_attr_cur_eq);
 534         device_create_file(&dev->ofdev.dev, &dev_attr_max_cq);
 535         device_create_file(&dev->ofdev.dev, &dev_attr_cur_cq);
 536         device_create_file(&dev->ofdev.dev, &dev_attr_max_qp);
 537         device_create_file(&dev->ofdev.dev, &dev_attr_cur_qp);
 538         device_create_file(&dev->ofdev.dev, &dev_attr_max_mr);
 539         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mr);
 540         device_create_file(&dev->ofdev.dev, &dev_attr_max_mw);
 541         device_create_file(&dev->ofdev.dev, &dev_attr_cur_mw);
 542         device_create_file(&dev->ofdev.dev, &dev_attr_max_pd);
 543         device_create_file(&dev->ofdev.dev, &dev_attr_max_ah);
 544 }
 545
 546 void ehca_remove_device_sysfs(struct ibmebus_dev *dev)
 547 {
 548         device_remove_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
 549         device_remove_file(&dev->ofdev.dev, &dev_attr_num_ports);
 550         device_remove_file(&dev->ofdev.dev, &dev_attr_hw_ver);
 551         device_remove_file(&dev->ofdev.dev, &dev_attr_max_eq);
 552         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_eq);
 553         device_remove_file(&dev->ofdev.dev, &dev_attr_max_cq);
 554         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_cq);
 555         device_remove_file(&dev->ofdev.dev, &dev_attr_max_qp);
 556         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_qp);
 557         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mr);
 558         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mr);
 559         device_remove_file(&dev->ofdev.dev, &dev_attr_max_mw);
 560         device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mw);
 561         device_remove_file(&dev->ofdev.dev, &dev_attr_max_pd);
 562         device_remove_file(&dev->ofdev.dev, &dev_attr_max_ah);
 563 }
 564
 565 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 566                                 const struct of_device_id *id)
 567 {
 568         struct ehca_shca *shca;
 569         const u64 *handle;
 570         struct ib_pd *ibpd;
 571         int ret;
 572
 573         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 574         if (!handle) {
 575                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 576                              dev->ofdev.node->full_name);
 577                 return -ENODEV;
 578         }
 579
 580         if (!(*handle)) {
 581                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 582                              dev->ofdev.node->full_name);
 583                 return -ENODEV;
 584         }
 585
 586         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 587         if (!shca) {
 588                 ehca_gen_err("Cannot allocate shca memory.");
 589                 return -ENOMEM;
 590         }
 591         mutex_init(&shca->modify_mutex);
 592
 593         shca->ibmebus_dev = dev;
 594         shca->ipz_hca_handle.handle = *handle;
 595         dev->ofdev.dev.driver_data = shca;
 596
 597         ret = ehca_sense_attributes(shca);
 598         if (ret < 0) {
 599                 ehca_gen_err("Cannot sense eHCA attributes.");
 600                 goto probe1;
 601         }
 602
 603         ret = ehca_init_device(shca);
 604         if (ret) {
 605                 ehca_gen_err("Cannot init ehca  device struct");
 606                 goto probe1;
 607         }
 608
 609         /* create event queues */
 610         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 611         if (ret) {
 612                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 613                 goto probe1;
 614         }
 615
 616         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 617         if (ret) {
 618                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 619                 goto probe3;
 620         }
 621
 622         /* create internal protection domain */
 623         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
 624         if (IS_ERR(ibpd)) {
 625                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 626                 ret = PTR_ERR(ibpd);
 627                 goto probe4;
 628         }
 629
 630         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 631         shca->pd->ib_pd.device = &shca->ib_device;
 632
 633         /* create internal max MR */
 634         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 635
 636         if (ret) {
 637                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
 638                          ret);
 639                 goto probe5;
 640         }
 641
 642         ret = ib_register_device(&shca->ib_device);
 643         if (ret) {
 644                 ehca_err(&shca->ib_device,
 645                          "ib_register_device() failed ret=%x", ret);
 646                 goto probe6;
 647         }
 648
 649         /* create AQP1 for port 1 */
 650         if (ehca_open_aqp1 == 1) {
 651                 shca->sport[0].port_state = IB_PORT_DOWN;
 652                 ret = ehca_create_aqp1(shca, 1);
 653                 if (ret) {
 654                         ehca_err(&shca->ib_device,
 655                                  "Cannot create AQP1 for port 1.");
 656                         goto probe7;
 657                 }
 658         }
 659
 660         /* create AQP1 for port 2 */
 661         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 662                 shca->sport[1].port_state = IB_PORT_DOWN;
 663                 ret = ehca_create_aqp1(shca, 2);
 664                 if (ret) {
 665                         ehca_err(&shca->ib_device,
 666                                  "Cannot create AQP1 for port 2.");
 667                         goto probe8;
 668                 }
 669         }
 670
 671         ehca_create_device_sysfs(dev);
 672
 673         spin_lock(&shca_list_lock);
 674         list_add(&shca->shca_list, &shca_list);
 675         spin_unlock(&shca_list_lock);
 676
 677         return 0;
 678
 679 probe8:
 680         ret = ehca_destroy_aqp1(&shca->sport[0]);
 681         if (ret)
 682                 ehca_err(&shca->ib_device,
 683                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
 684
 685 probe7:
 686         ib_unregister_device(&shca->ib_device);
 687
 688 probe6:
 689         ret = ehca_dereg_internal_maxmr(shca);
 690         if (ret)
 691                 ehca_err(&shca->ib_device,
 692                          "Cannot destroy internal MR. ret=%x", ret);
 693
 694 probe5:
 695         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 696         if (ret)
 697                 ehca_err(&shca->ib_device,
 698                          "Cannot destroy internal PD. ret=%x", ret);
 699
 700 probe4:
 701         ret = ehca_destroy_eq(shca, &shca->neq);
 702         if (ret)
 703                 ehca_err(&shca->ib_device,
 704                          "Cannot destroy NEQ. ret=%x", ret);
 705
 706 probe3:
 707         ret = ehca_destroy_eq(shca, &shca->eq);
 708         if (ret)
 709                 ehca_err(&shca->ib_device,
 710                          "Cannot destroy EQ. ret=%x", ret);
 711
 712 probe1:
 713         ib_dealloc_device(&shca->ib_device);
 714
 715         return -EINVAL;
 716 }
 717
 718 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 719 {
 720         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 721         int ret;
 722
 723         ehca_remove_device_sysfs(dev);
 724
 725         if (ehca_open_aqp1 == 1) {
 726                 int i;
 727                 for (i = 0; i < shca->num_ports; i++) {
 728                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 729                         if (ret)
 730                                 ehca_err(&shca->ib_device,
 731                                          "Cannot destroy AQP1 for port %x "
 732                                          "ret=%x", ret, i);
 733                 }
 734         }
 735
 736         ib_unregister_device(&shca->ib_device);
 737
 738         ret = ehca_dereg_internal_maxmr(shca);
 739         if (ret)
 740                 ehca_err(&shca->ib_device,
 741                          "Cannot destroy internal MR. ret=%x", ret);
 742
 743         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 744         if (ret)
 745                 ehca_err(&shca->ib_device,
 746                          "Cannot destroy internal PD. ret=%x", ret);
 747
 748         ret = ehca_destroy_eq(shca, &shca->eq);
 749         if (ret)
 750                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
 751
 752         ret = ehca_destroy_eq(shca, &shca->neq);
 753         if (ret)
 754                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
 755
 756         ib_dealloc_device(&shca->ib_device);
 757
 758         spin_lock(&shca_list_lock);
 759         list_del(&shca->shca_list);
 760         spin_unlock(&shca_list_lock);
 761
 762         return ret;
 763 }
 764
 765 static struct of_device_id ehca_device_table[] =
 766 {
 767         {
 768                 .name       = "lhca",
 769                 .compatible = "IBM,lhca",
 770         },
 771         {},
 772 };
 773
 774 static struct ibmebus_driver ehca_driver = {
 775         .name     = "ehca",
 776         .id_table = ehca_device_table,
 777         .probe    = ehca_probe,
 778         .remove   = ehca_remove,
 779 };
 780
 781 void ehca_poll_eqs(unsigned long data)
 782 {
 783         struct ehca_shca *shca;
 784
 785         spin_lock(&shca_list_lock);
 786         list_for_each_entry(shca, &shca_list, shca_list) {
 787                 if (shca->eq.is_initialized) {
 788                         /* call deadman proc only if eq ptr does not change */
 789                         struct ehca_eq *eq = &shca->eq;
 790                         int max = 3;
 791                         volatile u64 q_ofs, q_ofs2;
 792                         u64 flags;
 793                         spin_lock_irqsave(&eq->spinlock, flags);
 794                         q_ofs = eq->ipz_queue.current_q_offset;
 795                         spin_unlock_irqrestore(&eq->spinlock, flags);
 796                         do {
 797                                 spin_lock_irqsave(&eq->spinlock, flags);
 798                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 799                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 800                                 max--;
 801                         } while (q_ofs == q_ofs2 && max > 0);
 802                         if (q_ofs == q_ofs2)
 803                                 ehca_process_eq(shca, 0);
 804                 }
 805         }
 806         mod_timer(&poll_eqs_timer, jiffies + HZ);
 807         spin_unlock(&shca_list_lock);
 808 }
 809
 810 int __init ehca_module_init(void)
 811 {
 812         int ret;
 813
 814         printk(KERN_INFO "eHCA Infiniband Device Driver "
 815                "(Rel.: SVNEHCA_0022)\n");
 816         idr_init(&ehca_qp_idr);
 817         idr_init(&ehca_cq_idr);
 818         spin_lock_init(&ehca_qp_idr_lock);
 819         spin_lock_init(&ehca_cq_idr_lock);
 820
 821         INIT_LIST_HEAD(&shca_list);
 822         spin_lock_init(&shca_list_lock);
 823
 824         if ((ret = ehca_create_comp_pool())) {
 825                 ehca_gen_err("Cannot create comp pool.");
 826                 return ret;
 827         }
 828
 829         if ((ret = ehca_create_slab_caches())) {
 830                 ehca_gen_err("Cannot create SLAB caches");
 831                 ret = -ENOMEM;
 832                 goto module_init1;
 833         }
 834
 835         if ((ret = ibmebus_register_driver(&ehca_driver))) {
 836                 ehca_gen_err("Cannot register eHCA device driver");
 837                 ret = -EINVAL;
 838                 goto module_init2;
 839         }
 840
 841         ehca_create_driver_sysfs(&ehca_driver);
 842
 843         if (ehca_poll_all_eqs != 1) {
 844                 ehca_gen_err("WARNING!!!");
 845                 ehca_gen_err("It is possible to lose interrupts.");
 846         } else {
 847                 init_timer(&poll_eqs_timer);
 848                 poll_eqs_timer.function = ehca_poll_eqs;
 849                 poll_eqs_timer.expires = jiffies + HZ;
 850                 add_timer(&poll_eqs_timer);
 851         }
 852
 853         return 0;
 854
 855 module_init2:
 856         ehca_destroy_slab_caches();
 857
 858 module_init1:
 859         ehca_destroy_comp_pool();
 860         return ret;
 861 };
 862
 863 void __exit ehca_module_exit(void)
 864 {
 865         if (ehca_poll_all_eqs == 1)
 866                 del_timer_sync(&poll_eqs_timer);
 867
 868         ehca_remove_driver_sysfs(&ehca_driver);
 869         ibmebus_unregister_driver(&ehca_driver);
 870
 871         ehca_destroy_slab_caches();
 872
 873         ehca_destroy_comp_pool();
 874
 875         idr_destroy(&ehca_cq_idr);
 876         idr_destroy(&ehca_qp_idr);
 877 };
 878
 879 module_init(ehca_module_init);
 880 module_exit(ehca_module_exit);