drivers/infiniband/hw/ehca/ehca_main.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  module start stop, hca detection
   5  *
   6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   8  *           Joachim Fenkes <fenkes@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 #ifdef CONFIG_PPC_64K_PAGES
  44 #include <linux/slab.h>
  45 #endif
  46 #include "ehca_classes.h"
  47 #include "ehca_iverbs.h"
  48 #include "ehca_mrmw.h"
  49 #include "ehca_tools.h"
  50 #include "hcp_if.h"
  51
  52 MODULE_LICENSE("Dual BSD/GPL");
  53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  54 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  55 MODULE_VERSION("SVNEHCA_0023");
  56
  57 int ehca_open_aqp1     = 0;
  58 int ehca_debug_level   = 0;
  59 int ehca_hw_level      = 0;
  60 int ehca_nr_ports      = 2;
  61 int ehca_use_hp_mr     = 0;
  62 int ehca_port_act_time = 30;
  63 int ehca_poll_all_eqs  = 1;
  64 int ehca_static_rate   = -1;
  65 int ehca_scaling_code  = 0;
  66
  67 module_param_named(open_aqp1,     ehca_open_aqp1,     int, 0);
  68 module_param_named(debug_level,   ehca_debug_level,   int, 0);
  69 module_param_named(hw_level,      ehca_hw_level,      int, 0);
  70 module_param_named(nr_ports,      ehca_nr_ports,      int, 0);
  71 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, 0);
  72 module_param_named(port_act_time, ehca_port_act_time, int, 0);
  73 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, 0);
  74 module_param_named(static_rate,   ehca_static_rate,   int, 0);
  75 module_param_named(scaling_code,   ehca_scaling_code,   int, 0);
  76
  77 MODULE_PARM_DESC(open_aqp1,
  78                  "AQP1 on startup (0: no (default), 1: yes)");
  79 MODULE_PARM_DESC(debug_level,
  80                  "debug level"
  81                  " (0: no debug traces (default), 1: with debug traces)");
  82 MODULE_PARM_DESC(hw_level,
  83                  "hardware level"
  84                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  85 MODULE_PARM_DESC(nr_ports,
  86                  "number of connected ports (default: 2)");
  87 MODULE_PARM_DESC(use_hp_mr,
  88                  "high performance MRs (0: no (default), 1: yes)");
  89 MODULE_PARM_DESC(port_act_time,
  90                  "time to wait for port activation (default: 30 sec)");
  91 MODULE_PARM_DESC(poll_all_eqs,
  92                  "polls all event queues periodically"
  93                  " (0: no, 1: yes (default))");
  94 MODULE_PARM_DESC(static_rate,
  95                  "set permanent static rate (default: disabled)");
  96 MODULE_PARM_DESC(scaling_code,
  97                  "set scaling code (0: disabled/default, 1: enabled)");
  98
  99 spinlock_t ehca_qp_idr_lock;
 100 spinlock_t ehca_cq_idr_lock;
 101 spinlock_t hcall_lock;
 102 DEFINE_IDR(ehca_qp_idr);
 103 DEFINE_IDR(ehca_cq_idr);
 104
 105
 106 static struct list_head shca_list; /* list of all registered ehcas */
 107 static spinlock_t shca_list_lock;
 108
 109 static struct timer_list poll_eqs_timer;
 110
 111 #ifdef CONFIG_PPC_64K_PAGES
 112 static struct kmem_cache *ctblk_cache = NULL;
 113
 114 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 115 {
 116         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 117         if (!ret)
 118                 ehca_gen_err("Out of memory for ctblk");
 119         return ret;
 120 }
 121
 122 void ehca_free_fw_ctrlblock(void *ptr)
 123 {
 124         if (ptr)
 125                 kmem_cache_free(ctblk_cache, ptr);
 126
 127 }
 128 #endif
 129
 130 static int ehca_create_slab_caches(void)
 131 {
 132         int ret;
 133
 134         ret = ehca_init_pd_cache();
 135         if (ret) {
 136                 ehca_gen_err("Cannot create PD SLAB cache.");
 137                 return ret;
 138         }
 139
 140         ret = ehca_init_cq_cache();
 141         if (ret) {
 142                 ehca_gen_err("Cannot create CQ SLAB cache.");
 143                 goto create_slab_caches2;
 144         }
 145
 146         ret = ehca_init_qp_cache();
 147         if (ret) {
 148                 ehca_gen_err("Cannot create QP SLAB cache.");
 149                 goto create_slab_caches3;
 150         }
 151
 152         ret = ehca_init_av_cache();
 153         if (ret) {
 154                 ehca_gen_err("Cannot create AV SLAB cache.");
 155                 goto create_slab_caches4;
 156         }
 157
 158         ret = ehca_init_mrmw_cache();
 159         if (ret) {
 160                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 161                 goto create_slab_caches5;
 162         }
 163
 164 #ifdef CONFIG_PPC_64K_PAGES
 165         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 166                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 167                                         SLAB_HWCACHE_ALIGN,
 168                                         NULL, NULL);
 169         if (!ctblk_cache) {
 170                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 171                 ehca_cleanup_mrmw_cache();
 172                 goto create_slab_caches5;
 173         }
 174 #endif
 175         return 0;
 176
 177 create_slab_caches5:
 178         ehca_cleanup_av_cache();
 179
 180 create_slab_caches4:
 181         ehca_cleanup_qp_cache();
 182
 183 create_slab_caches3:
 184         ehca_cleanup_cq_cache();
 185
 186 create_slab_caches2:
 187         ehca_cleanup_pd_cache();
 188
 189         return ret;
 190 }
 191
 192 static void ehca_destroy_slab_caches(void)
 193 {
 194         ehca_cleanup_mrmw_cache();
 195         ehca_cleanup_av_cache();
 196         ehca_cleanup_qp_cache();
 197         ehca_cleanup_cq_cache();
 198         ehca_cleanup_pd_cache();
 199 #ifdef CONFIG_PPC_64K_PAGES
 200         if (ctblk_cache)
 201                 kmem_cache_destroy(ctblk_cache);
 202 #endif
 203 }
 204
 205 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32,39)
 206 #define EHCA_REVID    EHCA_BMASK_IBM(40,63)
 207
 208 static struct cap_descr {
 209         u64 mask;
 210         char *descr;
 211 } hca_cap_descr[] = {
 212         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 213         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 214         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 215         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 216         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 217         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 218         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 219         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 220         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 221         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 222         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 223         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 224         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 225         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 226         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 227         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 228         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 229 };
 230
 231 int ehca_sense_attributes(struct ehca_shca *shca)
 232 {
 233         int i, ret = 0;
 234         u64 h_ret;
 235         struct hipz_query_hca *rblock;
 236         struct hipz_query_port *port;
 237
 238         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 239         if (!rblock) {
 240                 ehca_gen_err("Cannot allocate rblock memory.");
 241                 return -ENOMEM;
 242         }
 243
 244         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 245         if (h_ret != H_SUCCESS) {
 246                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
 247                              h_ret);
 248                 ret = -EPERM;
 249                 goto sense_attributes1;
 250         }
 251
 252         if (ehca_nr_ports == 1)
 253                 shca->num_ports = 1;
 254         else
 255                 shca->num_ports = (u8)rblock->num_ports;
 256
 257         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 258
 259         if (ehca_hw_level == 0) {
 260                 u32 hcaaver;
 261                 u32 revid;
 262
 263                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 264                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 265
 266                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 267
 268                 if ((hcaaver == 1) && (revid == 0))
 269                         shca->hw_level = 0x11;
 270                 else if ((hcaaver == 1) && (revid == 1))
 271                         shca->hw_level = 0x12;
 272                 else if ((hcaaver == 1) && (revid == 2))
 273                         shca->hw_level = 0x13;
 274                 else if ((hcaaver == 2) && (revid == 0))
 275                         shca->hw_level = 0x21;
 276                 else if ((hcaaver == 2) && (revid == 0x10))
 277                         shca->hw_level = 0x22;
 278                 else {
 279                         ehca_gen_warn("unknown hardware version"
 280                                       " - assuming default level");
 281                         shca->hw_level = 0x22;
 282                 }
 283         }
 284         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 285
 286         shca->sport[0].rate = IB_RATE_30_GBPS;
 287         shca->sport[1].rate = IB_RATE_30_GBPS;
 288
 289         shca->hca_cap = rblock->hca_cap_indicators;
 290         ehca_gen_dbg(" ... HCA capabilities:");
 291         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 292                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 293                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 294
 295         port = (struct hipz_query_port *) rblock;
 296         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 297         if (h_ret != H_SUCCESS) {
 298                 ehca_gen_err("Cannot query port properties. h_ret=%lx",
 299                              h_ret);
 300                 ret = -EPERM;
 301                 goto sense_attributes1;
 302         }
 303
 304         shca->max_mtu = port->max_mtu;
 305
 306 sense_attributes1:
 307         ehca_free_fw_ctrlblock(rblock);
 308         return ret;
 309 }
 310
 311 static int init_node_guid(struct ehca_shca *shca)
 312 {
 313         int ret = 0;
 314         struct hipz_query_hca *rblock;
 315
 316         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 317         if (!rblock) {
 318                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 319                 return -ENOMEM;
 320         }
 321
 322         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 323                 ehca_err(&shca->ib_device, "Can't query device properties");
 324                 ret = -EINVAL;
 325                 goto init_node_guid1;
 326         }
 327
 328         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 329
 330 init_node_guid1:
 331         ehca_free_fw_ctrlblock(rblock);
 332         return ret;
 333 }
 334
 335 int ehca_init_device(struct ehca_shca *shca)
 336 {
 337         int ret;
 338
 339         ret = init_node_guid(shca);
 340         if (ret)
 341                 return ret;
 342
 343         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 344         shca->ib_device.owner               = THIS_MODULE;
 345
 346         shca->ib_device.uverbs_abi_ver      = 7;
 347         shca->ib_device.uverbs_cmd_mask     =
 348                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 349                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 350                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 351                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 352                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 353                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 354                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 355                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 356                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 357                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 358                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 359                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 360                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 361                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 362                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 363                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 364
 365         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 366         shca->ib_device.phys_port_cnt       = shca->num_ports;
 367         shca->ib_device.num_comp_vectors    = 1;
 368         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 369         shca->ib_device.query_device        = ehca_query_device;
 370         shca->ib_device.query_port          = ehca_query_port;
 371         shca->ib_device.query_gid           = ehca_query_gid;
 372         shca->ib_device.query_pkey          = ehca_query_pkey;
 373         /* shca->in_device.modify_device    = ehca_modify_device    */
 374         shca->ib_device.modify_port         = ehca_modify_port;
 375         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 376         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 377         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 378         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 379         shca->ib_device.create_ah           = ehca_create_ah;
 380         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 381         shca->ib_device.query_ah            = ehca_query_ah;
 382         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 383         shca->ib_device.create_qp           = ehca_create_qp;
 384         shca->ib_device.modify_qp           = ehca_modify_qp;
 385         shca->ib_device.query_qp            = ehca_query_qp;
 386         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 387         shca->ib_device.post_send           = ehca_post_send;
 388         shca->ib_device.post_recv           = ehca_post_recv;
 389         shca->ib_device.create_cq           = ehca_create_cq;
 390         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 391         shca->ib_device.resize_cq           = ehca_resize_cq;
 392         shca->ib_device.poll_cq             = ehca_poll_cq;
 393         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 394         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 395         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 396         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 397         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 398         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 399         shca->ib_device.query_mr            = ehca_query_mr;
 400         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 401         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 402         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 403         shca->ib_device.bind_mw             = ehca_bind_mw;
 404         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 405         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 406         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 407         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 408         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 409         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 410         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 411         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 412         shca->ib_device.mmap                = ehca_mmap;
 413
 414         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 415                 shca->ib_device.uverbs_cmd_mask |=
 416                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 417                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 418                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 419                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 420
 421                 shca->ib_device.create_srq          = ehca_create_srq;
 422                 shca->ib_device.modify_srq          = ehca_modify_srq;
 423                 shca->ib_device.query_srq           = ehca_query_srq;
 424                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 425                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 426         }
 427
 428         return ret;
 429 }
 430
 431 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 432 {
 433         struct ehca_sport *sport = &shca->sport[port - 1];
 434         struct ib_cq *ibcq;
 435         struct ib_qp *ibqp;
 436         struct ib_qp_init_attr qp_init_attr;
 437         int ret;
 438
 439         if (sport->ibcq_aqp1) {
 440                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 441                 return -EPERM;
 442         }
 443
 444         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
 445         if (IS_ERR(ibcq)) {
 446                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 447                 return PTR_ERR(ibcq);
 448         }
 449         sport->ibcq_aqp1 = ibcq;
 450
 451         if (sport->ibqp_aqp1) {
 452                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 453                 ret = -EPERM;
 454                 goto create_aqp1;
 455         }
 456
 457         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 458         qp_init_attr.send_cq          = ibcq;
 459         qp_init_attr.recv_cq          = ibcq;
 460         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 461         qp_init_attr.cap.max_send_wr  = 100;
 462         qp_init_attr.cap.max_recv_wr  = 100;
 463         qp_init_attr.cap.max_send_sge = 2;
 464         qp_init_attr.cap.max_recv_sge = 1;
 465         qp_init_attr.qp_type          = IB_QPT_GSI;
 466         qp_init_attr.port_num         = port;
 467         qp_init_attr.qp_context       = NULL;
 468         qp_init_attr.event_handler    = NULL;
 469         qp_init_attr.srq              = NULL;
 470
 471         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 472         if (IS_ERR(ibqp)) {
 473                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 474                 ret = PTR_ERR(ibqp);
 475                 goto create_aqp1;
 476         }
 477         sport->ibqp_aqp1 = ibqp;
 478
 479         return 0;
 480
 481 create_aqp1:
 482         ib_destroy_cq(sport->ibcq_aqp1);
 483         return ret;
 484 }
 485
 486 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 487 {
 488         int ret;
 489
 490         ret = ib_destroy_qp(sport->ibqp_aqp1);
 491         if (ret) {
 492                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
 493                 return ret;
 494         }
 495
 496         ret = ib_destroy_cq(sport->ibcq_aqp1);
 497         if (ret)
 498                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
 499
 500         return ret;
 501 }
 502
 503 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 504 {
 505         return snprintf(buf, PAGE_SIZE, "%d\n",
 506                         ehca_debug_level);
 507 }
 508
 509 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 510                                       const char *buf, size_t count)
 511 {
 512         int value = (*buf) - '0';
 513         if (value >= 0 && value <= 9)
 514                 ehca_debug_level = value;
 515         return 1;
 516 }
 517
 518 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 519             ehca_show_debug_level, ehca_store_debug_level);
 520
 521 static struct attribute *ehca_drv_attrs[] = {
 522         &driver_attr_debug_level.attr,
 523         NULL
 524 };
 525
 526 static struct attribute_group ehca_drv_attr_grp = {
 527         .attrs = ehca_drv_attrs
 528 };
 529
 530 #define EHCA_RESOURCE_ATTR(name)                                           \
 531 static ssize_t  ehca_show_##name(struct device *dev,                       \
 532                                  struct device_attribute *attr,            \
 533                                  char *buf)                                \
 534 {                                                                          \
 535         struct ehca_shca *shca;                                            \
 536         struct hipz_query_hca *rblock;                                     \
 537         int data;                                                          \
 538                                                                            \
 539         shca = dev->driver_data;                                           \
 540                                                                            \
 541         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 542         if (!rblock) {                                                     \
 543                 dev_err(dev, "Can't allocate rblock memory.");             \
 544                 return 0;                                                  \
 545         }                                                                  \
 546                                                                            \
 547         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 548                 dev_err(dev, "Can't query device properties");             \
 549                 ehca_free_fw_ctrlblock(rblock);                            \
 550                 return 0;                                                  \
 551         }                                                                  \
 552                                                                            \
 553         data = rblock->name;                                               \
 554         ehca_free_fw_ctrlblock(rblock);                                    \
 555                                                                            \
 556         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 557                 return snprintf(buf, 256, "1\n");                          \
 558         else                                                               \
 559                 return snprintf(buf, 256, "%d\n", data);                   \
 560                                                                            \
 561 }                                                                          \
 562 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 563
 564 EHCA_RESOURCE_ATTR(num_ports);
 565 EHCA_RESOURCE_ATTR(hw_ver);
 566 EHCA_RESOURCE_ATTR(max_eq);
 567 EHCA_RESOURCE_ATTR(cur_eq);
 568 EHCA_RESOURCE_ATTR(max_cq);
 569 EHCA_RESOURCE_ATTR(cur_cq);
 570 EHCA_RESOURCE_ATTR(max_qp);
 571 EHCA_RESOURCE_ATTR(cur_qp);
 572 EHCA_RESOURCE_ATTR(max_mr);
 573 EHCA_RESOURCE_ATTR(cur_mr);
 574 EHCA_RESOURCE_ATTR(max_mw);
 575 EHCA_RESOURCE_ATTR(cur_mw);
 576 EHCA_RESOURCE_ATTR(max_pd);
 577 EHCA_RESOURCE_ATTR(max_ah);
 578
 579 static ssize_t ehca_show_adapter_handle(struct device *dev,
 580                                         struct device_attribute *attr,
 581                                         char *buf)
 582 {
 583         struct ehca_shca *shca = dev->driver_data;
 584
 585         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 586
 587 }
 588 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 589
 590 static struct attribute *ehca_dev_attrs[] = {
 591         &dev_attr_adapter_handle.attr,
 592         &dev_attr_num_ports.attr,
 593         &dev_attr_hw_ver.attr,
 594         &dev_attr_max_eq.attr,
 595         &dev_attr_cur_eq.attr,
 596         &dev_attr_max_cq.attr,
 597         &dev_attr_cur_cq.attr,
 598         &dev_attr_max_qp.attr,
 599         &dev_attr_cur_qp.attr,
 600         &dev_attr_max_mr.attr,
 601         &dev_attr_cur_mr.attr,
 602         &dev_attr_max_mw.attr,
 603         &dev_attr_cur_mw.attr,
 604         &dev_attr_max_pd.attr,
 605         &dev_attr_max_ah.attr,
 606         NULL
 607 };
 608
 609 static struct attribute_group ehca_dev_attr_grp = {
 610         .attrs = ehca_dev_attrs
 611 };
 612
 613 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 614                                 const struct of_device_id *id)
 615 {
 616         struct ehca_shca *shca;
 617         const u64 *handle;
 618         struct ib_pd *ibpd;
 619         int ret;
 620
 621         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 622         if (!handle) {
 623                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 624                              dev->ofdev.node->full_name);
 625                 return -ENODEV;
 626         }
 627
 628         if (!(*handle)) {
 629                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 630                              dev->ofdev.node->full_name);
 631                 return -ENODEV;
 632         }
 633
 634         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 635         if (!shca) {
 636                 ehca_gen_err("Cannot allocate shca memory.");
 637                 return -ENOMEM;
 638         }
 639         mutex_init(&shca->modify_mutex);
 640
 641         shca->ibmebus_dev = dev;
 642         shca->ipz_hca_handle.handle = *handle;
 643         dev->ofdev.dev.driver_data = shca;
 644
 645         ret = ehca_sense_attributes(shca);
 646         if (ret < 0) {
 647                 ehca_gen_err("Cannot sense eHCA attributes.");
 648                 goto probe1;
 649         }
 650
 651         ret = ehca_init_device(shca);
 652         if (ret) {
 653                 ehca_gen_err("Cannot init ehca  device struct");
 654                 goto probe1;
 655         }
 656
 657         /* create event queues */
 658         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 659         if (ret) {
 660                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 661                 goto probe1;
 662         }
 663
 664         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 665         if (ret) {
 666                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 667                 goto probe3;
 668         }
 669
 670         /* create internal protection domain */
 671         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
 672         if (IS_ERR(ibpd)) {
 673                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 674                 ret = PTR_ERR(ibpd);
 675                 goto probe4;
 676         }
 677
 678         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 679         shca->pd->ib_pd.device = &shca->ib_device;
 680
 681         /* create internal max MR */
 682         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 683
 684         if (ret) {
 685                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
 686                          ret);
 687                 goto probe5;
 688         }
 689
 690         ret = ib_register_device(&shca->ib_device);
 691         if (ret) {
 692                 ehca_err(&shca->ib_device,
 693                          "ib_register_device() failed ret=%x", ret);
 694                 goto probe6;
 695         }
 696
 697         /* create AQP1 for port 1 */
 698         if (ehca_open_aqp1 == 1) {
 699                 shca->sport[0].port_state = IB_PORT_DOWN;
 700                 ret = ehca_create_aqp1(shca, 1);
 701                 if (ret) {
 702                         ehca_err(&shca->ib_device,
 703                                  "Cannot create AQP1 for port 1.");
 704                         goto probe7;
 705                 }
 706         }
 707
 708         /* create AQP1 for port 2 */
 709         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 710                 shca->sport[1].port_state = IB_PORT_DOWN;
 711                 ret = ehca_create_aqp1(shca, 2);
 712                 if (ret) {
 713                         ehca_err(&shca->ib_device,
 714                                  "Cannot create AQP1 for port 2.");
 715                         goto probe8;
 716                 }
 717         }
 718
 719         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 720         if (ret) /* only complain; we can live without attributes */
 721                 ehca_err(&shca->ib_device,
 722                          "Cannot create device attributes  ret=%d", ret);
 723
 724         spin_lock(&shca_list_lock);
 725         list_add(&shca->shca_list, &shca_list);
 726         spin_unlock(&shca_list_lock);
 727
 728         return 0;
 729
 730 probe8:
 731         ret = ehca_destroy_aqp1(&shca->sport[0]);
 732         if (ret)
 733                 ehca_err(&shca->ib_device,
 734                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
 735
 736 probe7:
 737         ib_unregister_device(&shca->ib_device);
 738
 739 probe6:
 740         ret = ehca_dereg_internal_maxmr(shca);
 741         if (ret)
 742                 ehca_err(&shca->ib_device,
 743                          "Cannot destroy internal MR. ret=%x", ret);
 744
 745 probe5:
 746         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 747         if (ret)
 748                 ehca_err(&shca->ib_device,
 749                          "Cannot destroy internal PD. ret=%x", ret);
 750
 751 probe4:
 752         ret = ehca_destroy_eq(shca, &shca->neq);
 753         if (ret)
 754                 ehca_err(&shca->ib_device,
 755                          "Cannot destroy NEQ. ret=%x", ret);
 756
 757 probe3:
 758         ret = ehca_destroy_eq(shca, &shca->eq);
 759         if (ret)
 760                 ehca_err(&shca->ib_device,
 761                          "Cannot destroy EQ. ret=%x", ret);
 762
 763 probe1:
 764         ib_dealloc_device(&shca->ib_device);
 765
 766         return -EINVAL;
 767 }
 768
 769 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 770 {
 771         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 772         int ret;
 773
 774         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 775
 776         if (ehca_open_aqp1 == 1) {
 777                 int i;
 778                 for (i = 0; i < shca->num_ports; i++) {
 779                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 780                         if (ret)
 781                                 ehca_err(&shca->ib_device,
 782                                          "Cannot destroy AQP1 for port %x "
 783                                          "ret=%x", ret, i);
 784                 }
 785         }
 786
 787         ib_unregister_device(&shca->ib_device);
 788
 789         ret = ehca_dereg_internal_maxmr(shca);
 790         if (ret)
 791                 ehca_err(&shca->ib_device,
 792                          "Cannot destroy internal MR. ret=%x", ret);
 793
 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         ret = ehca_destroy_eq(shca, &shca->eq);
 800         if (ret)
 801                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
 802
 803         ret = ehca_destroy_eq(shca, &shca->neq);
 804         if (ret)
 805                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
 806
 807         ib_dealloc_device(&shca->ib_device);
 808
 809         spin_lock(&shca_list_lock);
 810         list_del(&shca->shca_list);
 811         spin_unlock(&shca_list_lock);
 812
 813         return ret;
 814 }
 815
 816 static struct of_device_id ehca_device_table[] =
 817 {
 818         {
 819                 .name       = "lhca",
 820                 .compatible = "IBM,lhca",
 821         },
 822         {},
 823 };
 824
 825 static struct ibmebus_driver ehca_driver = {
 826         .name     = "ehca",
 827         .id_table = ehca_device_table,
 828         .probe    = ehca_probe,
 829         .remove   = ehca_remove,
 830 };
 831
 832 void ehca_poll_eqs(unsigned long data)
 833 {
 834         struct ehca_shca *shca;
 835
 836         spin_lock(&shca_list_lock);
 837         list_for_each_entry(shca, &shca_list, shca_list) {
 838                 if (shca->eq.is_initialized) {
 839                         /* call deadman proc only if eq ptr does not change */
 840                         struct ehca_eq *eq = &shca->eq;
 841                         int max = 3;
 842                         volatile u64 q_ofs, q_ofs2;
 843                         u64 flags;
 844                         spin_lock_irqsave(&eq->spinlock, flags);
 845                         q_ofs = eq->ipz_queue.current_q_offset;
 846                         spin_unlock_irqrestore(&eq->spinlock, flags);
 847                         do {
 848                                 spin_lock_irqsave(&eq->spinlock, flags);
 849                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 850                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 851                                 max--;
 852                         } while (q_ofs == q_ofs2 && max > 0);
 853                         if (q_ofs == q_ofs2)
 854                                 ehca_process_eq(shca, 0);
 855                 }
 856         }
 857         mod_timer(&poll_eqs_timer, jiffies + HZ);
 858         spin_unlock(&shca_list_lock);
 859 }
 860
 861 int __init ehca_module_init(void)
 862 {
 863         int ret;
 864
 865         printk(KERN_INFO "eHCA Infiniband Device Driver "
 866                "(Rel.: SVNEHCA_0023)\n");
 867         idr_init(&ehca_qp_idr);
 868         idr_init(&ehca_cq_idr);
 869         spin_lock_init(&ehca_qp_idr_lock);
 870         spin_lock_init(&ehca_cq_idr_lock);
 871         spin_lock_init(&hcall_lock);
 872
 873         INIT_LIST_HEAD(&shca_list);
 874         spin_lock_init(&shca_list_lock);
 875
 876         if ((ret = ehca_create_comp_pool())) {
 877                 ehca_gen_err("Cannot create comp pool.");
 878                 return ret;
 879         }
 880
 881         if ((ret = ehca_create_slab_caches())) {
 882                 ehca_gen_err("Cannot create SLAB caches");
 883                 ret = -ENOMEM;
 884                 goto module_init1;
 885         }
 886
 887         if ((ret = ibmebus_register_driver(&ehca_driver))) {
 888                 ehca_gen_err("Cannot register eHCA device driver");
 889                 ret = -EINVAL;
 890                 goto module_init2;
 891         }
 892
 893         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 894         if (ret) /* only complain; we can live without attributes */
 895                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 896
 897         if (ehca_poll_all_eqs != 1) {
 898                 ehca_gen_err("WARNING!!!");
 899                 ehca_gen_err("It is possible to lose interrupts.");
 900         } else {
 901                 init_timer(&poll_eqs_timer);
 902                 poll_eqs_timer.function = ehca_poll_eqs;
 903                 poll_eqs_timer.expires = jiffies + HZ;
 904                 add_timer(&poll_eqs_timer);
 905         }
 906
 907         return 0;
 908
 909 module_init2:
 910         ehca_destroy_slab_caches();
 911
 912 module_init1:
 913         ehca_destroy_comp_pool();
 914         return ret;
 915 };
 916
 917 void __exit ehca_module_exit(void)
 918 {
 919         if (ehca_poll_all_eqs == 1)
 920                 del_timer_sync(&poll_eqs_timer);
 921
 922         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 923         ibmebus_unregister_driver(&ehca_driver);
 924
 925         ehca_destroy_slab_caches();
 926
 927         ehca_destroy_comp_pool();
 928
 929         idr_destroy(&ehca_cq_idr);
 930         idr_destroy(&ehca_qp_idr);
 931 };
 932
 933 module_init(ehca_module_init);
 934 module_exit(ehca_module_exit);