git.oblomov.eu Git - linux-2.6/blob - 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 #define HCAD_VERSION "0024"
  53
  54 MODULE_LICENSE("Dual BSD/GPL");
  55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  56 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  57 MODULE_VERSION(HCAD_VERSION);
  58
  59 int ehca_open_aqp1     = 0;
  60 int ehca_debug_level   = 0;
  61 int ehca_hw_level      = 0;
  62 int ehca_nr_ports      = 2;
  63 int ehca_use_hp_mr     = 0;
  64 int ehca_port_act_time = 30;
  65 int ehca_poll_all_eqs  = 1;
  66 int ehca_static_rate   = -1;
  67 int ehca_scaling_code  = 0;
  68 int ehca_mr_largepage  = 0;
  69
  70 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
  71 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
  72 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
  73 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
  74 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
  75 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
  76 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
  77 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
  78 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
  79 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
  80
  81 MODULE_PARM_DESC(open_aqp1,
  82                  "AQP1 on startup (0: no (default), 1: yes)");
  83 MODULE_PARM_DESC(debug_level,
  84                  "debug level"
  85                  " (0: no debug traces (default), 1: with debug traces)");
  86 MODULE_PARM_DESC(hw_level,
  87                  "hardware level"
  88                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  89 MODULE_PARM_DESC(nr_ports,
  90                  "number of connected ports (default: 2)");
  91 MODULE_PARM_DESC(use_hp_mr,
  92                  "high performance MRs (0: no (default), 1: yes)");
  93 MODULE_PARM_DESC(port_act_time,
  94                  "time to wait for port activation (default: 30 sec)");
  95 MODULE_PARM_DESC(poll_all_eqs,
  96                  "polls all event queues periodically"
  97                  " (0: no, 1: yes (default))");
  98 MODULE_PARM_DESC(static_rate,
  99                  "set permanent static rate (default: disabled)");
 100 MODULE_PARM_DESC(scaling_code,
 101                  "set scaling code (0: disabled/default, 1: enabled)");
 102 MODULE_PARM_DESC(mr_largepage,
 103                  "use large page for MR (0: use PAGE_SIZE (default), "
 104                  "1: use large page depending on MR size");
 105
 106 DEFINE_RWLOCK(ehca_qp_idr_lock);
 107 DEFINE_RWLOCK(ehca_cq_idr_lock);
 108 DEFINE_IDR(ehca_qp_idr);
 109 DEFINE_IDR(ehca_cq_idr);
 110
 111 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 112 static DEFINE_SPINLOCK(shca_list_lock);
 113
 114 static struct timer_list poll_eqs_timer;
 115
 116 #ifdef CONFIG_PPC_64K_PAGES
 117 static struct kmem_cache *ctblk_cache;
 118
 119 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 120 {
 121         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 122         if (!ret)
 123                 ehca_gen_err("Out of memory for ctblk");
 124         return ret;
 125 }
 126
 127 void ehca_free_fw_ctrlblock(void *ptr)
 128 {
 129         if (ptr)
 130                 kmem_cache_free(ctblk_cache, ptr);
 131
 132 }
 133 #endif
 134
 135 int ehca2ib_return_code(u64 ehca_rc)
 136 {
 137         switch (ehca_rc) {
 138         case H_SUCCESS:
 139                 return 0;
 140         case H_RESOURCE:             /* Resource in use */
 141         case H_BUSY:
 142                 return -EBUSY;
 143         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 144         case H_CONSTRAINED:          /* resource constraint */
 145         case H_NO_MEM:
 146                 return -ENOMEM;
 147         default:
 148                 return -EINVAL;
 149         }
 150 }
 151
 152 static int ehca_create_slab_caches(void)
 153 {
 154         int ret;
 155
 156         ret = ehca_init_pd_cache();
 157         if (ret) {
 158                 ehca_gen_err("Cannot create PD SLAB cache.");
 159                 return ret;
 160         }
 161
 162         ret = ehca_init_cq_cache();
 163         if (ret) {
 164                 ehca_gen_err("Cannot create CQ SLAB cache.");
 165                 goto create_slab_caches2;
 166         }
 167
 168         ret = ehca_init_qp_cache();
 169         if (ret) {
 170                 ehca_gen_err("Cannot create QP SLAB cache.");
 171                 goto create_slab_caches3;
 172         }
 173
 174         ret = ehca_init_av_cache();
 175         if (ret) {
 176                 ehca_gen_err("Cannot create AV SLAB cache.");
 177                 goto create_slab_caches4;
 178         }
 179
 180         ret = ehca_init_mrmw_cache();
 181         if (ret) {
 182                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 183                 goto create_slab_caches5;
 184         }
 185
 186         ret = ehca_init_small_qp_cache();
 187         if (ret) {
 188                 ehca_gen_err("Cannot create small queue SLAB cache.");
 189                 goto create_slab_caches6;
 190         }
 191
 192 #ifdef CONFIG_PPC_64K_PAGES
 193         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 194                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 195                                         SLAB_HWCACHE_ALIGN,
 196                                         NULL);
 197         if (!ctblk_cache) {
 198                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 199                 ehca_cleanup_small_qp_cache();
 200                 goto create_slab_caches6;
 201         }
 202 #endif
 203         return 0;
 204
 205 create_slab_caches6:
 206         ehca_cleanup_mrmw_cache();
 207
 208 create_slab_caches5:
 209         ehca_cleanup_av_cache();
 210
 211 create_slab_caches4:
 212         ehca_cleanup_qp_cache();
 213
 214 create_slab_caches3:
 215         ehca_cleanup_cq_cache();
 216
 217 create_slab_caches2:
 218         ehca_cleanup_pd_cache();
 219
 220         return ret;
 221 }
 222
 223 static void ehca_destroy_slab_caches(void)
 224 {
 225         ehca_cleanup_small_qp_cache();
 226         ehca_cleanup_mrmw_cache();
 227         ehca_cleanup_av_cache();
 228         ehca_cleanup_qp_cache();
 229         ehca_cleanup_cq_cache();
 230         ehca_cleanup_pd_cache();
 231 #ifdef CONFIG_PPC_64K_PAGES
 232         if (ctblk_cache)
 233                 kmem_cache_destroy(ctblk_cache);
 234 #endif
 235 }
 236
 237 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 238 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 239
 240 static struct cap_descr {
 241         u64 mask;
 242         char *descr;
 243 } hca_cap_descr[] = {
 244         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 245         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 246         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 247         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 248         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 249         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 250         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 251         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 252         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 253         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 254         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 255         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 256         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 257         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 258         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 259         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 260         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 261 };
 262
 263 int ehca_sense_attributes(struct ehca_shca *shca)
 264 {
 265         int i, ret = 0;
 266         u64 h_ret;
 267         struct hipz_query_hca *rblock;
 268         struct hipz_query_port *port;
 269
 270         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 271         if (!rblock) {
 272                 ehca_gen_err("Cannot allocate rblock memory.");
 273                 return -ENOMEM;
 274         }
 275
 276         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 277         if (h_ret != H_SUCCESS) {
 278                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 279                              h_ret);
 280                 ret = -EPERM;
 281                 goto sense_attributes1;
 282         }
 283
 284         if (ehca_nr_ports == 1)
 285                 shca->num_ports = 1;
 286         else
 287                 shca->num_ports = (u8)rblock->num_ports;
 288
 289         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 290
 291         if (ehca_hw_level == 0) {
 292                 u32 hcaaver;
 293                 u32 revid;
 294
 295                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 296                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 297
 298                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 299
 300                 if (hcaaver == 1) {
 301                         if (revid <= 3)
 302                                 shca->hw_level = 0x10 | (revid + 1);
 303                         else
 304                                 shca->hw_level = 0x14;
 305                 } else if (hcaaver == 2) {
 306                         if (revid == 0)
 307                                 shca->hw_level = 0x21;
 308                         else if (revid == 0x10)
 309                                 shca->hw_level = 0x22;
 310                         else if (revid == 0x20 || revid == 0x21)
 311                                 shca->hw_level = 0x23;
 312                 }
 313
 314                 if (!shca->hw_level) {
 315                         ehca_gen_warn("unknown hardware version"
 316                                       " - assuming default level");
 317                         shca->hw_level = 0x22;
 318                 }
 319         } else
 320                 shca->hw_level = ehca_hw_level;
 321         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 322
 323         shca->sport[0].rate = IB_RATE_30_GBPS;
 324         shca->sport[1].rate = IB_RATE_30_GBPS;
 325
 326         shca->hca_cap = rblock->hca_cap_indicators;
 327         ehca_gen_dbg(" ... HCA capabilities:");
 328         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 329                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 330                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 331
 332         shca->hca_cap_mr_pgsize = rblock->memory_page_size_supported;
 333
 334         port = (struct hipz_query_port *)rblock;
 335         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 336         if (h_ret != H_SUCCESS) {
 337                 ehca_gen_err("Cannot query port properties. h_ret=%li",
 338                              h_ret);
 339                 ret = -EPERM;
 340                 goto sense_attributes1;
 341         }
 342
 343         shca->max_mtu = port->max_mtu;
 344
 345 sense_attributes1:
 346         ehca_free_fw_ctrlblock(rblock);
 347         return ret;
 348 }
 349
 350 static int init_node_guid(struct ehca_shca *shca)
 351 {
 352         int ret = 0;
 353         struct hipz_query_hca *rblock;
 354
 355         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 356         if (!rblock) {
 357                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 358                 return -ENOMEM;
 359         }
 360
 361         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 362                 ehca_err(&shca->ib_device, "Can't query device properties");
 363                 ret = -EINVAL;
 364                 goto init_node_guid1;
 365         }
 366
 367         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 368
 369 init_node_guid1:
 370         ehca_free_fw_ctrlblock(rblock);
 371         return ret;
 372 }
 373
 374 int ehca_init_device(struct ehca_shca *shca)
 375 {
 376         int ret;
 377
 378         ret = init_node_guid(shca);
 379         if (ret)
 380                 return ret;
 381
 382         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 383         shca->ib_device.owner               = THIS_MODULE;
 384
 385         shca->ib_device.uverbs_abi_ver      = 8;
 386         shca->ib_device.uverbs_cmd_mask     =
 387                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 388                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 389                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 390                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 391                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 392                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 393                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 394                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 395                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 396                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 397                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 398                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 399                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 400                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 401                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 402                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 403
 404         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 405         shca->ib_device.phys_port_cnt       = shca->num_ports;
 406         shca->ib_device.num_comp_vectors    = 1;
 407         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 408         shca->ib_device.query_device        = ehca_query_device;
 409         shca->ib_device.query_port          = ehca_query_port;
 410         shca->ib_device.query_gid           = ehca_query_gid;
 411         shca->ib_device.query_pkey          = ehca_query_pkey;
 412         /* shca->in_device.modify_device    = ehca_modify_device    */
 413         shca->ib_device.modify_port         = ehca_modify_port;
 414         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 415         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 416         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 417         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 418         shca->ib_device.create_ah           = ehca_create_ah;
 419         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 420         shca->ib_device.query_ah            = ehca_query_ah;
 421         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 422         shca->ib_device.create_qp           = ehca_create_qp;
 423         shca->ib_device.modify_qp           = ehca_modify_qp;
 424         shca->ib_device.query_qp            = ehca_query_qp;
 425         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 426         shca->ib_device.post_send           = ehca_post_send;
 427         shca->ib_device.post_recv           = ehca_post_recv;
 428         shca->ib_device.create_cq           = ehca_create_cq;
 429         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 430         shca->ib_device.resize_cq           = ehca_resize_cq;
 431         shca->ib_device.poll_cq             = ehca_poll_cq;
 432         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 433         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 434         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 435         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 436         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 437         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 438         shca->ib_device.query_mr            = ehca_query_mr;
 439         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 440         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 441         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 442         shca->ib_device.bind_mw             = ehca_bind_mw;
 443         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 444         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 445         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 446         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 447         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 448         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 449         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 450         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 451         shca->ib_device.mmap                = ehca_mmap;
 452
 453         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 454                 shca->ib_device.uverbs_cmd_mask |=
 455                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 456                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 457                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 458                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 459
 460                 shca->ib_device.create_srq          = ehca_create_srq;
 461                 shca->ib_device.modify_srq          = ehca_modify_srq;
 462                 shca->ib_device.query_srq           = ehca_query_srq;
 463                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 464                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 465         }
 466
 467         return ret;
 468 }
 469
 470 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 471 {
 472         struct ehca_sport *sport = &shca->sport[port - 1];
 473         struct ib_cq *ibcq;
 474         struct ib_qp *ibqp;
 475         struct ib_qp_init_attr qp_init_attr;
 476         int ret;
 477
 478         if (sport->ibcq_aqp1) {
 479                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 480                 return -EPERM;
 481         }
 482
 483         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 484         if (IS_ERR(ibcq)) {
 485                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 486                 return PTR_ERR(ibcq);
 487         }
 488         sport->ibcq_aqp1 = ibcq;
 489
 490         if (sport->ibqp_aqp1) {
 491                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 492                 ret = -EPERM;
 493                 goto create_aqp1;
 494         }
 495
 496         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 497         qp_init_attr.send_cq          = ibcq;
 498         qp_init_attr.recv_cq          = ibcq;
 499         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 500         qp_init_attr.cap.max_send_wr  = 100;
 501         qp_init_attr.cap.max_recv_wr  = 100;
 502         qp_init_attr.cap.max_send_sge = 2;
 503         qp_init_attr.cap.max_recv_sge = 1;
 504         qp_init_attr.qp_type          = IB_QPT_GSI;
 505         qp_init_attr.port_num         = port;
 506         qp_init_attr.qp_context       = NULL;
 507         qp_init_attr.event_handler    = NULL;
 508         qp_init_attr.srq              = NULL;
 509
 510         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 511         if (IS_ERR(ibqp)) {
 512                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 513                 ret = PTR_ERR(ibqp);
 514                 goto create_aqp1;
 515         }
 516         sport->ibqp_aqp1 = ibqp;
 517
 518         return 0;
 519
 520 create_aqp1:
 521         ib_destroy_cq(sport->ibcq_aqp1);
 522         return ret;
 523 }
 524
 525 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 526 {
 527         int ret;
 528
 529         ret = ib_destroy_qp(sport->ibqp_aqp1);
 530         if (ret) {
 531                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 532                 return ret;
 533         }
 534
 535         ret = ib_destroy_cq(sport->ibcq_aqp1);
 536         if (ret)
 537                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 538
 539         return ret;
 540 }
 541
 542 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 543 {
 544         return snprintf(buf, PAGE_SIZE, "%d\n",
 545                         ehca_debug_level);
 546 }
 547
 548 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 549                                       const char *buf, size_t count)
 550 {
 551         int value = (*buf) - '0';
 552         if (value >= 0 && value <= 9)
 553                 ehca_debug_level = value;
 554         return 1;
 555 }
 556
 557 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 558             ehca_show_debug_level, ehca_store_debug_level);
 559
 560 static struct attribute *ehca_drv_attrs[] = {
 561         &driver_attr_debug_level.attr,
 562         NULL
 563 };
 564
 565 static struct attribute_group ehca_drv_attr_grp = {
 566         .attrs = ehca_drv_attrs
 567 };
 568
 569 #define EHCA_RESOURCE_ATTR(name)                                           \
 570 static ssize_t  ehca_show_##name(struct device *dev,                       \
 571                                  struct device_attribute *attr,            \
 572                                  char *buf)                                \
 573 {                                                                          \
 574         struct ehca_shca *shca;                                            \
 575         struct hipz_query_hca *rblock;                                     \
 576         int data;                                                          \
 577                                                                            \
 578         shca = dev->driver_data;                                           \
 579                                                                            \
 580         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 581         if (!rblock) {                                                     \
 582                 dev_err(dev, "Can't allocate rblock memory.");             \
 583                 return 0;                                                  \
 584         }                                                                  \
 585                                                                            \
 586         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 587                 dev_err(dev, "Can't query device properties");             \
 588                 ehca_free_fw_ctrlblock(rblock);                            \
 589                 return 0;                                                  \
 590         }                                                                  \
 591                                                                            \
 592         data = rblock->name;                                               \
 593         ehca_free_fw_ctrlblock(rblock);                                    \
 594                                                                            \
 595         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 596                 return snprintf(buf, 256, "1\n");                          \
 597         else                                                               \
 598                 return snprintf(buf, 256, "%d\n", data);                   \
 599                                                                            \
 600 }                                                                          \
 601 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 602
 603 EHCA_RESOURCE_ATTR(num_ports);
 604 EHCA_RESOURCE_ATTR(hw_ver);
 605 EHCA_RESOURCE_ATTR(max_eq);
 606 EHCA_RESOURCE_ATTR(cur_eq);
 607 EHCA_RESOURCE_ATTR(max_cq);
 608 EHCA_RESOURCE_ATTR(cur_cq);
 609 EHCA_RESOURCE_ATTR(max_qp);
 610 EHCA_RESOURCE_ATTR(cur_qp);
 611 EHCA_RESOURCE_ATTR(max_mr);
 612 EHCA_RESOURCE_ATTR(cur_mr);
 613 EHCA_RESOURCE_ATTR(max_mw);
 614 EHCA_RESOURCE_ATTR(cur_mw);
 615 EHCA_RESOURCE_ATTR(max_pd);
 616 EHCA_RESOURCE_ATTR(max_ah);
 617
 618 static ssize_t ehca_show_adapter_handle(struct device *dev,
 619                                         struct device_attribute *attr,
 620                                         char *buf)
 621 {
 622         struct ehca_shca *shca = dev->driver_data;
 623
 624         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 625
 626 }
 627 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 628
 629 static ssize_t ehca_show_mr_largepage(struct device *dev,
 630                                       struct device_attribute *attr,
 631                                       char *buf)
 632 {
 633         return sprintf(buf, "%d\n", ehca_mr_largepage);
 634 }
 635 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
 636
 637 static struct attribute *ehca_dev_attrs[] = {
 638         &dev_attr_adapter_handle.attr,
 639         &dev_attr_num_ports.attr,
 640         &dev_attr_hw_ver.attr,
 641         &dev_attr_max_eq.attr,
 642         &dev_attr_cur_eq.attr,
 643         &dev_attr_max_cq.attr,
 644         &dev_attr_cur_cq.attr,
 645         &dev_attr_max_qp.attr,
 646         &dev_attr_cur_qp.attr,
 647         &dev_attr_max_mr.attr,
 648         &dev_attr_cur_mr.attr,
 649         &dev_attr_max_mw.attr,
 650         &dev_attr_cur_mw.attr,
 651         &dev_attr_max_pd.attr,
 652         &dev_attr_max_ah.attr,
 653         &dev_attr_mr_largepage.attr,
 654         NULL
 655 };
 656
 657 static struct attribute_group ehca_dev_attr_grp = {
 658         .attrs = ehca_dev_attrs
 659 };
 660
 661 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 662                                 const struct of_device_id *id)
 663 {
 664         struct ehca_shca *shca;
 665         const u64 *handle;
 666         struct ib_pd *ibpd;
 667         int ret;
 668
 669         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 670         if (!handle) {
 671                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 672                              dev->ofdev.node->full_name);
 673                 return -ENODEV;
 674         }
 675
 676         if (!(*handle)) {
 677                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 678                              dev->ofdev.node->full_name);
 679                 return -ENODEV;
 680         }
 681
 682         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 683         if (!shca) {
 684                 ehca_gen_err("Cannot allocate shca memory.");
 685                 return -ENOMEM;
 686         }
 687         mutex_init(&shca->modify_mutex);
 688
 689         shca->ibmebus_dev = dev;
 690         shca->ipz_hca_handle.handle = *handle;
 691         dev->ofdev.dev.driver_data = shca;
 692
 693         ret = ehca_sense_attributes(shca);
 694         if (ret < 0) {
 695                 ehca_gen_err("Cannot sense eHCA attributes.");
 696                 goto probe1;
 697         }
 698
 699         ret = ehca_init_device(shca);
 700         if (ret) {
 701                 ehca_gen_err("Cannot init ehca  device struct");
 702                 goto probe1;
 703         }
 704
 705         /* create event queues */
 706         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 707         if (ret) {
 708                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 709                 goto probe1;
 710         }
 711
 712         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 713         if (ret) {
 714                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 715                 goto probe3;
 716         }
 717
 718         /* create internal protection domain */
 719         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 720         if (IS_ERR(ibpd)) {
 721                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 722                 ret = PTR_ERR(ibpd);
 723                 goto probe4;
 724         }
 725
 726         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 727         shca->pd->ib_pd.device = &shca->ib_device;
 728
 729         /* create internal max MR */
 730         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 731
 732         if (ret) {
 733                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 734                          ret);
 735                 goto probe5;
 736         }
 737
 738         ret = ib_register_device(&shca->ib_device);
 739         if (ret) {
 740                 ehca_err(&shca->ib_device,
 741                          "ib_register_device() failed ret=%i", ret);
 742                 goto probe6;
 743         }
 744
 745         /* create AQP1 for port 1 */
 746         if (ehca_open_aqp1 == 1) {
 747                 shca->sport[0].port_state = IB_PORT_DOWN;
 748                 ret = ehca_create_aqp1(shca, 1);
 749                 if (ret) {
 750                         ehca_err(&shca->ib_device,
 751                                  "Cannot create AQP1 for port 1.");
 752                         goto probe7;
 753                 }
 754         }
 755
 756         /* create AQP1 for port 2 */
 757         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 758                 shca->sport[1].port_state = IB_PORT_DOWN;
 759                 ret = ehca_create_aqp1(shca, 2);
 760                 if (ret) {
 761                         ehca_err(&shca->ib_device,
 762                                  "Cannot create AQP1 for port 2.");
 763                         goto probe8;
 764                 }
 765         }
 766
 767         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 768         if (ret) /* only complain; we can live without attributes */
 769                 ehca_err(&shca->ib_device,
 770                          "Cannot create device attributes  ret=%d", ret);
 771
 772         spin_lock(&shca_list_lock);
 773         list_add(&shca->shca_list, &shca_list);
 774         spin_unlock(&shca_list_lock);
 775
 776         return 0;
 777
 778 probe8:
 779         ret = ehca_destroy_aqp1(&shca->sport[0]);
 780         if (ret)
 781                 ehca_err(&shca->ib_device,
 782                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 783
 784 probe7:
 785         ib_unregister_device(&shca->ib_device);
 786
 787 probe6:
 788         ret = ehca_dereg_internal_maxmr(shca);
 789         if (ret)
 790                 ehca_err(&shca->ib_device,
 791                          "Cannot destroy internal MR. ret=%x", ret);
 792
 793 probe5:
 794         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 795         if (ret)
 796                 ehca_err(&shca->ib_device,
 797                          "Cannot destroy internal PD. ret=%x", ret);
 798
 799 probe4:
 800         ret = ehca_destroy_eq(shca, &shca->neq);
 801         if (ret)
 802                 ehca_err(&shca->ib_device,
 803                          "Cannot destroy NEQ. ret=%x", ret);
 804
 805 probe3:
 806         ret = ehca_destroy_eq(shca, &shca->eq);
 807         if (ret)
 808                 ehca_err(&shca->ib_device,
 809                          "Cannot destroy EQ. ret=%x", ret);
 810
 811 probe1:
 812         ib_dealloc_device(&shca->ib_device);
 813
 814         return -EINVAL;
 815 }
 816
 817 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 818 {
 819         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 820         int ret;
 821
 822         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 823
 824         if (ehca_open_aqp1 == 1) {
 825                 int i;
 826                 for (i = 0; i < shca->num_ports; i++) {
 827                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 828                         if (ret)
 829                                 ehca_err(&shca->ib_device,
 830                                          "Cannot destroy AQP1 for port %x "
 831                                          "ret=%i", ret, i);
 832                 }
 833         }
 834
 835         ib_unregister_device(&shca->ib_device);
 836
 837         ret = ehca_dereg_internal_maxmr(shca);
 838         if (ret)
 839                 ehca_err(&shca->ib_device,
 840                          "Cannot destroy internal MR. ret=%i", ret);
 841
 842         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 843         if (ret)
 844                 ehca_err(&shca->ib_device,
 845                          "Cannot destroy internal PD. ret=%i", ret);
 846
 847         ret = ehca_destroy_eq(shca, &shca->eq);
 848         if (ret)
 849                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 850
 851         ret = ehca_destroy_eq(shca, &shca->neq);
 852         if (ret)
 853                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 854
 855         ib_dealloc_device(&shca->ib_device);
 856
 857         spin_lock(&shca_list_lock);
 858         list_del(&shca->shca_list);
 859         spin_unlock(&shca_list_lock);
 860
 861         return ret;
 862 }
 863
 864 static struct of_device_id ehca_device_table[] =
 865 {
 866         {
 867                 .name       = "lhca",
 868                 .compatible = "IBM,lhca",
 869         },
 870         {},
 871 };
 872
 873 static struct ibmebus_driver ehca_driver = {
 874         .name     = "ehca",
 875         .id_table = ehca_device_table,
 876         .probe    = ehca_probe,
 877         .remove   = ehca_remove,
 878 };
 879
 880 void ehca_poll_eqs(unsigned long data)
 881 {
 882         struct ehca_shca *shca;
 883
 884         spin_lock(&shca_list_lock);
 885         list_for_each_entry(shca, &shca_list, shca_list) {
 886                 if (shca->eq.is_initialized) {
 887                         /* call deadman proc only if eq ptr does not change */
 888                         struct ehca_eq *eq = &shca->eq;
 889                         int max = 3;
 890                         volatile u64 q_ofs, q_ofs2;
 891                         u64 flags;
 892                         spin_lock_irqsave(&eq->spinlock, flags);
 893                         q_ofs = eq->ipz_queue.current_q_offset;
 894                         spin_unlock_irqrestore(&eq->spinlock, flags);
 895                         do {
 896                                 spin_lock_irqsave(&eq->spinlock, flags);
 897                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 898                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 899                                 max--;
 900                         } while (q_ofs == q_ofs2 && max > 0);
 901                         if (q_ofs == q_ofs2)
 902                                 ehca_process_eq(shca, 0);
 903                 }
 904         }
 905         mod_timer(&poll_eqs_timer, jiffies + HZ);
 906         spin_unlock(&shca_list_lock);
 907 }
 908
 909 int __init ehca_module_init(void)
 910 {
 911         int ret;
 912
 913         printk(KERN_INFO "eHCA Infiniband Device Driver "
 914                "(Version " HCAD_VERSION ")\n");
 915
 916         ret = ehca_create_comp_pool();
 917         if (ret) {
 918                 ehca_gen_err("Cannot create comp pool.");
 919                 return ret;
 920         }
 921
 922         ret = ehca_create_slab_caches();
 923         if (ret) {
 924                 ehca_gen_err("Cannot create SLAB caches");
 925                 ret = -ENOMEM;
 926                 goto module_init1;
 927         }
 928
 929         ret = ibmebus_register_driver(&ehca_driver);
 930         if (ret) {
 931                 ehca_gen_err("Cannot register eHCA device driver");
 932                 ret = -EINVAL;
 933                 goto module_init2;
 934         }
 935
 936         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 937         if (ret) /* only complain; we can live without attributes */
 938                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 939
 940         if (ehca_poll_all_eqs != 1) {
 941                 ehca_gen_err("WARNING!!!");
 942                 ehca_gen_err("It is possible to lose interrupts.");
 943         } else {
 944                 init_timer(&poll_eqs_timer);
 945                 poll_eqs_timer.function = ehca_poll_eqs;
 946                 poll_eqs_timer.expires = jiffies + HZ;
 947                 add_timer(&poll_eqs_timer);
 948         }
 949
 950         return 0;
 951
 952 module_init2:
 953         ehca_destroy_slab_caches();
 954
 955 module_init1:
 956         ehca_destroy_comp_pool();
 957         return ret;
 958 };
 959
 960 void __exit ehca_module_exit(void)
 961 {
 962         if (ehca_poll_all_eqs == 1)
 963                 del_timer_sync(&poll_eqs_timer);
 964
 965         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 966         ibmebus_unregister_driver(&ehca_driver);
 967
 968         ehca_destroy_slab_caches();
 969
 970         ehca_destroy_comp_pool();
 971
 972         idr_destroy(&ehca_cq_idr);
 973         idr_destroy(&ehca_qp_idr);
 974 };
 975
 976 module_init(ehca_module_init);
 977 module_exit(ehca_module_exit);