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 DEFINE_RWLOCK(ehca_qp_idr_lock);
 100 DEFINE_RWLOCK(ehca_cq_idr_lock);
 101 DEFINE_IDR(ehca_qp_idr);
 102 DEFINE_IDR(ehca_cq_idr);
 103
 104 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 105 static DEFINE_SPINLOCK(shca_list_lock);
 106
 107 static struct timer_list poll_eqs_timer;
 108
 109 #ifdef CONFIG_PPC_64K_PAGES
 110 static struct kmem_cache *ctblk_cache = NULL;
 111
 112 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 113 {
 114         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 115         if (!ret)
 116                 ehca_gen_err("Out of memory for ctblk");
 117         return ret;
 118 }
 119
 120 void ehca_free_fw_ctrlblock(void *ptr)
 121 {
 122         if (ptr)
 123                 kmem_cache_free(ctblk_cache, ptr);
 124
 125 }
 126 #endif
 127
 128 static int ehca_create_slab_caches(void)
 129 {
 130         int ret;
 131
 132         ret = ehca_init_pd_cache();
 133         if (ret) {
 134                 ehca_gen_err("Cannot create PD SLAB cache.");
 135                 return ret;
 136         }
 137
 138         ret = ehca_init_cq_cache();
 139         if (ret) {
 140                 ehca_gen_err("Cannot create CQ SLAB cache.");
 141                 goto create_slab_caches2;
 142         }
 143
 144         ret = ehca_init_qp_cache();
 145         if (ret) {
 146                 ehca_gen_err("Cannot create QP SLAB cache.");
 147                 goto create_slab_caches3;
 148         }
 149
 150         ret = ehca_init_av_cache();
 151         if (ret) {
 152                 ehca_gen_err("Cannot create AV SLAB cache.");
 153                 goto create_slab_caches4;
 154         }
 155
 156         ret = ehca_init_mrmw_cache();
 157         if (ret) {
 158                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 159                 goto create_slab_caches5;
 160         }
 161
 162 #ifdef CONFIG_PPC_64K_PAGES
 163         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 164                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 165                                         SLAB_HWCACHE_ALIGN,
 166                                         NULL, NULL);
 167         if (!ctblk_cache) {
 168                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 169                 ehca_cleanup_mrmw_cache();
 170                 goto create_slab_caches5;
 171         }
 172 #endif
 173         return 0;
 174
 175 create_slab_caches5:
 176         ehca_cleanup_av_cache();
 177
 178 create_slab_caches4:
 179         ehca_cleanup_qp_cache();
 180
 181 create_slab_caches3:
 182         ehca_cleanup_cq_cache();
 183
 184 create_slab_caches2:
 185         ehca_cleanup_pd_cache();
 186
 187         return ret;
 188 }
 189
 190 static void ehca_destroy_slab_caches(void)
 191 {
 192         ehca_cleanup_mrmw_cache();
 193         ehca_cleanup_av_cache();
 194         ehca_cleanup_qp_cache();
 195         ehca_cleanup_cq_cache();
 196         ehca_cleanup_pd_cache();
 197 #ifdef CONFIG_PPC_64K_PAGES
 198         if (ctblk_cache)
 199                 kmem_cache_destroy(ctblk_cache);
 200 #endif
 201 }
 202
 203 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32,39)
 204 #define EHCA_REVID    EHCA_BMASK_IBM(40,63)
 205
 206 static struct cap_descr {
 207         u64 mask;
 208         char *descr;
 209 } hca_cap_descr[] = {
 210         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 211         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 212         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 213         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 214         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 215         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 216         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 217         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 218         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 219         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 220         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 221         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 222         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 223         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 224         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 225         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 226         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 227 };
 228
 229 int ehca_sense_attributes(struct ehca_shca *shca)
 230 {
 231         int i, ret = 0;
 232         u64 h_ret;
 233         struct hipz_query_hca *rblock;
 234         struct hipz_query_port *port;
 235
 236         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 237         if (!rblock) {
 238                 ehca_gen_err("Cannot allocate rblock memory.");
 239                 return -ENOMEM;
 240         }
 241
 242         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 243         if (h_ret != H_SUCCESS) {
 244                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
 245                              h_ret);
 246                 ret = -EPERM;
 247                 goto sense_attributes1;
 248         }
 249
 250         if (ehca_nr_ports == 1)
 251                 shca->num_ports = 1;
 252         else
 253                 shca->num_ports = (u8)rblock->num_ports;
 254
 255         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 256
 257         if (ehca_hw_level == 0) {
 258                 u32 hcaaver;
 259                 u32 revid;
 260
 261                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 262                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 263
 264                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 265
 266                 if ((hcaaver == 1) && (revid == 0))
 267                         shca->hw_level = 0x11;
 268                 else if ((hcaaver == 1) && (revid == 1))
 269                         shca->hw_level = 0x12;
 270                 else if ((hcaaver == 1) && (revid == 2))
 271                         shca->hw_level = 0x13;
 272                 else if ((hcaaver == 2) && (revid == 0))
 273                         shca->hw_level = 0x21;
 274                 else if ((hcaaver == 2) && (revid == 0x10))
 275                         shca->hw_level = 0x22;
 276                 else {
 277                         ehca_gen_warn("unknown hardware version"
 278                                       " - assuming default level");
 279                         shca->hw_level = 0x22;
 280                 }
 281         }
 282         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 283
 284         shca->sport[0].rate = IB_RATE_30_GBPS;
 285         shca->sport[1].rate = IB_RATE_30_GBPS;
 286
 287         shca->hca_cap = rblock->hca_cap_indicators;
 288         ehca_gen_dbg(" ... HCA capabilities:");
 289         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 290                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 291                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 292
 293         port = (struct hipz_query_port *) rblock;
 294         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 295         if (h_ret != H_SUCCESS) {
 296                 ehca_gen_err("Cannot query port properties. h_ret=%lx",
 297                              h_ret);
 298                 ret = -EPERM;
 299                 goto sense_attributes1;
 300         }
 301
 302         shca->max_mtu = port->max_mtu;
 303
 304 sense_attributes1:
 305         ehca_free_fw_ctrlblock(rblock);
 306         return ret;
 307 }
 308
 309 static int init_node_guid(struct ehca_shca *shca)
 310 {
 311         int ret = 0;
 312         struct hipz_query_hca *rblock;
 313
 314         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 315         if (!rblock) {
 316                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 317                 return -ENOMEM;
 318         }
 319
 320         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 321                 ehca_err(&shca->ib_device, "Can't query device properties");
 322                 ret = -EINVAL;
 323                 goto init_node_guid1;
 324         }
 325
 326         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 327
 328 init_node_guid1:
 329         ehca_free_fw_ctrlblock(rblock);
 330         return ret;
 331 }
 332
 333 int ehca_init_device(struct ehca_shca *shca)
 334 {
 335         int ret;
 336
 337         ret = init_node_guid(shca);
 338         if (ret)
 339                 return ret;
 340
 341         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 342         shca->ib_device.owner               = THIS_MODULE;
 343
 344         shca->ib_device.uverbs_abi_ver      = 7;
 345         shca->ib_device.uverbs_cmd_mask     =
 346                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 347                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 348                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 349                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 350                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 351                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 352                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 353                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 354                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 355                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 356                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 357                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 358                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 359                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 360                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 361                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 362
 363         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 364         shca->ib_device.phys_port_cnt       = shca->num_ports;
 365         shca->ib_device.num_comp_vectors    = 1;
 366         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 367         shca->ib_device.query_device        = ehca_query_device;
 368         shca->ib_device.query_port          = ehca_query_port;
 369         shca->ib_device.query_gid           = ehca_query_gid;
 370         shca->ib_device.query_pkey          = ehca_query_pkey;
 371         /* shca->in_device.modify_device    = ehca_modify_device    */
 372         shca->ib_device.modify_port         = ehca_modify_port;
 373         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 374         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 375         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 376         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 377         shca->ib_device.create_ah           = ehca_create_ah;
 378         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 379         shca->ib_device.query_ah            = ehca_query_ah;
 380         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 381         shca->ib_device.create_qp           = ehca_create_qp;
 382         shca->ib_device.modify_qp           = ehca_modify_qp;
 383         shca->ib_device.query_qp            = ehca_query_qp;
 384         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 385         shca->ib_device.post_send           = ehca_post_send;
 386         shca->ib_device.post_recv           = ehca_post_recv;
 387         shca->ib_device.create_cq           = ehca_create_cq;
 388         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 389         shca->ib_device.resize_cq           = ehca_resize_cq;
 390         shca->ib_device.poll_cq             = ehca_poll_cq;
 391         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 392         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 393         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 394         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 395         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 396         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 397         shca->ib_device.query_mr            = ehca_query_mr;
 398         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 399         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 400         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 401         shca->ib_device.bind_mw             = ehca_bind_mw;
 402         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 403         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 404         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 405         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 406         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 407         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 408         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 409         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 410         shca->ib_device.mmap                = ehca_mmap;
 411
 412         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 413                 shca->ib_device.uverbs_cmd_mask |=
 414                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 415                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 416                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 417                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 418
 419                 shca->ib_device.create_srq          = ehca_create_srq;
 420                 shca->ib_device.modify_srq          = ehca_modify_srq;
 421                 shca->ib_device.query_srq           = ehca_query_srq;
 422                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 423                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 424         }
 425
 426         return ret;
 427 }
 428
 429 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 430 {
 431         struct ehca_sport *sport = &shca->sport[port - 1];
 432         struct ib_cq *ibcq;
 433         struct ib_qp *ibqp;
 434         struct ib_qp_init_attr qp_init_attr;
 435         int ret;
 436
 437         if (sport->ibcq_aqp1) {
 438                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 439                 return -EPERM;
 440         }
 441
 442         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
 443         if (IS_ERR(ibcq)) {
 444                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 445                 return PTR_ERR(ibcq);
 446         }
 447         sport->ibcq_aqp1 = ibcq;
 448
 449         if (sport->ibqp_aqp1) {
 450                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 451                 ret = -EPERM;
 452                 goto create_aqp1;
 453         }
 454
 455         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 456         qp_init_attr.send_cq          = ibcq;
 457         qp_init_attr.recv_cq          = ibcq;
 458         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 459         qp_init_attr.cap.max_send_wr  = 100;
 460         qp_init_attr.cap.max_recv_wr  = 100;
 461         qp_init_attr.cap.max_send_sge = 2;
 462         qp_init_attr.cap.max_recv_sge = 1;
 463         qp_init_attr.qp_type          = IB_QPT_GSI;
 464         qp_init_attr.port_num         = port;
 465         qp_init_attr.qp_context       = NULL;
 466         qp_init_attr.event_handler    = NULL;
 467         qp_init_attr.srq              = NULL;
 468
 469         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 470         if (IS_ERR(ibqp)) {
 471                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 472                 ret = PTR_ERR(ibqp);
 473                 goto create_aqp1;
 474         }
 475         sport->ibqp_aqp1 = ibqp;
 476
 477         return 0;
 478
 479 create_aqp1:
 480         ib_destroy_cq(sport->ibcq_aqp1);
 481         return ret;
 482 }
 483
 484 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 485 {
 486         int ret;
 487
 488         ret = ib_destroy_qp(sport->ibqp_aqp1);
 489         if (ret) {
 490                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
 491                 return ret;
 492         }
 493
 494         ret = ib_destroy_cq(sport->ibcq_aqp1);
 495         if (ret)
 496                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
 497
 498         return ret;
 499 }
 500
 501 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 502 {
 503         return snprintf(buf, PAGE_SIZE, "%d\n",
 504                         ehca_debug_level);
 505 }
 506
 507 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 508                                       const char *buf, size_t count)
 509 {
 510         int value = (*buf) - '0';
 511         if (value >= 0 && value <= 9)
 512                 ehca_debug_level = value;
 513         return 1;
 514 }
 515
 516 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 517             ehca_show_debug_level, ehca_store_debug_level);
 518
 519 static struct attribute *ehca_drv_attrs[] = {
 520         &driver_attr_debug_level.attr,
 521         NULL
 522 };
 523
 524 static struct attribute_group ehca_drv_attr_grp = {
 525         .attrs = ehca_drv_attrs
 526 };
 527
 528 #define EHCA_RESOURCE_ATTR(name)                                           \
 529 static ssize_t  ehca_show_##name(struct device *dev,                       \
 530                                  struct device_attribute *attr,            \
 531                                  char *buf)                                \
 532 {                                                                          \
 533         struct ehca_shca *shca;                                            \
 534         struct hipz_query_hca *rblock;                                     \
 535         int data;                                                          \
 536                                                                            \
 537         shca = dev->driver_data;                                           \
 538                                                                            \
 539         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 540         if (!rblock) {                                                     \
 541                 dev_err(dev, "Can't allocate rblock memory.");             \
 542                 return 0;                                                  \
 543         }                                                                  \
 544                                                                            \
 545         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 546                 dev_err(dev, "Can't query device properties");             \
 547                 ehca_free_fw_ctrlblock(rblock);                            \
 548                 return 0;                                                  \
 549         }                                                                  \
 550                                                                            \
 551         data = rblock->name;                                               \
 552         ehca_free_fw_ctrlblock(rblock);                                    \
 553                                                                            \
 554         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 555                 return snprintf(buf, 256, "1\n");                          \
 556         else                                                               \
 557                 return snprintf(buf, 256, "%d\n", data);                   \
 558                                                                            \
 559 }                                                                          \
 560 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 561
 562 EHCA_RESOURCE_ATTR(num_ports);
 563 EHCA_RESOURCE_ATTR(hw_ver);
 564 EHCA_RESOURCE_ATTR(max_eq);
 565 EHCA_RESOURCE_ATTR(cur_eq);
 566 EHCA_RESOURCE_ATTR(max_cq);
 567 EHCA_RESOURCE_ATTR(cur_cq);
 568 EHCA_RESOURCE_ATTR(max_qp);
 569 EHCA_RESOURCE_ATTR(cur_qp);
 570 EHCA_RESOURCE_ATTR(max_mr);
 571 EHCA_RESOURCE_ATTR(cur_mr);
 572 EHCA_RESOURCE_ATTR(max_mw);
 573 EHCA_RESOURCE_ATTR(cur_mw);
 574 EHCA_RESOURCE_ATTR(max_pd);
 575 EHCA_RESOURCE_ATTR(max_ah);
 576
 577 static ssize_t ehca_show_adapter_handle(struct device *dev,
 578                                         struct device_attribute *attr,
 579                                         char *buf)
 580 {
 581         struct ehca_shca *shca = dev->driver_data;
 582
 583         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 584
 585 }
 586 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 587
 588 static struct attribute *ehca_dev_attrs[] = {
 589         &dev_attr_adapter_handle.attr,
 590         &dev_attr_num_ports.attr,
 591         &dev_attr_hw_ver.attr,
 592         &dev_attr_max_eq.attr,
 593         &dev_attr_cur_eq.attr,
 594         &dev_attr_max_cq.attr,
 595         &dev_attr_cur_cq.attr,
 596         &dev_attr_max_qp.attr,
 597         &dev_attr_cur_qp.attr,
 598         &dev_attr_max_mr.attr,
 599         &dev_attr_cur_mr.attr,
 600         &dev_attr_max_mw.attr,
 601         &dev_attr_cur_mw.attr,
 602         &dev_attr_max_pd.attr,
 603         &dev_attr_max_ah.attr,
 604         NULL
 605 };
 606
 607 static struct attribute_group ehca_dev_attr_grp = {
 608         .attrs = ehca_dev_attrs
 609 };
 610
 611 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 612                                 const struct of_device_id *id)
 613 {
 614         struct ehca_shca *shca;
 615         const u64 *handle;
 616         struct ib_pd *ibpd;
 617         int ret;
 618
 619         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 620         if (!handle) {
 621                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 622                              dev->ofdev.node->full_name);
 623                 return -ENODEV;
 624         }
 625
 626         if (!(*handle)) {
 627                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 628                              dev->ofdev.node->full_name);
 629                 return -ENODEV;
 630         }
 631
 632         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 633         if (!shca) {
 634                 ehca_gen_err("Cannot allocate shca memory.");
 635                 return -ENOMEM;
 636         }
 637         mutex_init(&shca->modify_mutex);
 638
 639         shca->ibmebus_dev = dev;
 640         shca->ipz_hca_handle.handle = *handle;
 641         dev->ofdev.dev.driver_data = shca;
 642
 643         ret = ehca_sense_attributes(shca);
 644         if (ret < 0) {
 645                 ehca_gen_err("Cannot sense eHCA attributes.");
 646                 goto probe1;
 647         }
 648
 649         ret = ehca_init_device(shca);
 650         if (ret) {
 651                 ehca_gen_err("Cannot init ehca  device struct");
 652                 goto probe1;
 653         }
 654
 655         /* create event queues */
 656         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 657         if (ret) {
 658                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 659                 goto probe1;
 660         }
 661
 662         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 663         if (ret) {
 664                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 665                 goto probe3;
 666         }
 667
 668         /* create internal protection domain */
 669         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
 670         if (IS_ERR(ibpd)) {
 671                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 672                 ret = PTR_ERR(ibpd);
 673                 goto probe4;
 674         }
 675
 676         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 677         shca->pd->ib_pd.device = &shca->ib_device;
 678
 679         /* create internal max MR */
 680         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 681
 682         if (ret) {
 683                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
 684                          ret);
 685                 goto probe5;
 686         }
 687
 688         ret = ib_register_device(&shca->ib_device);
 689         if (ret) {
 690                 ehca_err(&shca->ib_device,
 691                          "ib_register_device() failed ret=%x", ret);
 692                 goto probe6;
 693         }
 694
 695         /* create AQP1 for port 1 */
 696         if (ehca_open_aqp1 == 1) {
 697                 shca->sport[0].port_state = IB_PORT_DOWN;
 698                 ret = ehca_create_aqp1(shca, 1);
 699                 if (ret) {
 700                         ehca_err(&shca->ib_device,
 701                                  "Cannot create AQP1 for port 1.");
 702                         goto probe7;
 703                 }
 704         }
 705
 706         /* create AQP1 for port 2 */
 707         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 708                 shca->sport[1].port_state = IB_PORT_DOWN;
 709                 ret = ehca_create_aqp1(shca, 2);
 710                 if (ret) {
 711                         ehca_err(&shca->ib_device,
 712                                  "Cannot create AQP1 for port 2.");
 713                         goto probe8;
 714                 }
 715         }
 716
 717         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 718         if (ret) /* only complain; we can live without attributes */
 719                 ehca_err(&shca->ib_device,
 720                          "Cannot create device attributes  ret=%d", ret);
 721
 722         spin_lock(&shca_list_lock);
 723         list_add(&shca->shca_list, &shca_list);
 724         spin_unlock(&shca_list_lock);
 725
 726         return 0;
 727
 728 probe8:
 729         ret = ehca_destroy_aqp1(&shca->sport[0]);
 730         if (ret)
 731                 ehca_err(&shca->ib_device,
 732                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
 733
 734 probe7:
 735         ib_unregister_device(&shca->ib_device);
 736
 737 probe6:
 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 probe5:
 744         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 745         if (ret)
 746                 ehca_err(&shca->ib_device,
 747                          "Cannot destroy internal PD. ret=%x", ret);
 748
 749 probe4:
 750         ret = ehca_destroy_eq(shca, &shca->neq);
 751         if (ret)
 752                 ehca_err(&shca->ib_device,
 753                          "Cannot destroy NEQ. ret=%x", ret);
 754
 755 probe3:
 756         ret = ehca_destroy_eq(shca, &shca->eq);
 757         if (ret)
 758                 ehca_err(&shca->ib_device,
 759                          "Cannot destroy EQ. ret=%x", ret);
 760
 761 probe1:
 762         ib_dealloc_device(&shca->ib_device);
 763
 764         return -EINVAL;
 765 }
 766
 767 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 768 {
 769         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 770         int ret;
 771
 772         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 773
 774         if (ehca_open_aqp1 == 1) {
 775                 int i;
 776                 for (i = 0; i < shca->num_ports; i++) {
 777                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 778                         if (ret)
 779                                 ehca_err(&shca->ib_device,
 780                                          "Cannot destroy AQP1 for port %x "
 781                                          "ret=%x", ret, i);
 782                 }
 783         }
 784
 785         ib_unregister_device(&shca->ib_device);
 786
 787         ret = ehca_dereg_internal_maxmr(shca);
 788         if (ret)
 789                 ehca_err(&shca->ib_device,
 790                          "Cannot destroy internal MR. ret=%x", ret);
 791
 792         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 793         if (ret)
 794                 ehca_err(&shca->ib_device,
 795                          "Cannot destroy internal PD. ret=%x", ret);
 796
 797         ret = ehca_destroy_eq(shca, &shca->eq);
 798         if (ret)
 799                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
 800
 801         ret = ehca_destroy_eq(shca, &shca->neq);
 802         if (ret)
 803                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
 804
 805         ib_dealloc_device(&shca->ib_device);
 806
 807         spin_lock(&shca_list_lock);
 808         list_del(&shca->shca_list);
 809         spin_unlock(&shca_list_lock);
 810
 811         return ret;
 812 }
 813
 814 static struct of_device_id ehca_device_table[] =
 815 {
 816         {
 817                 .name       = "lhca",
 818                 .compatible = "IBM,lhca",
 819         },
 820         {},
 821 };
 822
 823 static struct ibmebus_driver ehca_driver = {
 824         .name     = "ehca",
 825         .id_table = ehca_device_table,
 826         .probe    = ehca_probe,
 827         .remove   = ehca_remove,
 828 };
 829
 830 void ehca_poll_eqs(unsigned long data)
 831 {
 832         struct ehca_shca *shca;
 833
 834         spin_lock(&shca_list_lock);
 835         list_for_each_entry(shca, &shca_list, shca_list) {
 836                 if (shca->eq.is_initialized) {
 837                         /* call deadman proc only if eq ptr does not change */
 838                         struct ehca_eq *eq = &shca->eq;
 839                         int max = 3;
 840                         volatile u64 q_ofs, q_ofs2;
 841                         u64 flags;
 842                         spin_lock_irqsave(&eq->spinlock, flags);
 843                         q_ofs = eq->ipz_queue.current_q_offset;
 844                         spin_unlock_irqrestore(&eq->spinlock, flags);
 845                         do {
 846                                 spin_lock_irqsave(&eq->spinlock, flags);
 847                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 848                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 849                                 max--;
 850                         } while (q_ofs == q_ofs2 && max > 0);
 851                         if (q_ofs == q_ofs2)
 852                                 ehca_process_eq(shca, 0);
 853                 }
 854         }
 855         mod_timer(&poll_eqs_timer, jiffies + HZ);
 856         spin_unlock(&shca_list_lock);
 857 }
 858
 859 int __init ehca_module_init(void)
 860 {
 861         int ret;
 862
 863         printk(KERN_INFO "eHCA Infiniband Device Driver "
 864                "(Rel.: SVNEHCA_0023)\n");
 865
 866         if ((ret = ehca_create_comp_pool())) {
 867                 ehca_gen_err("Cannot create comp pool.");
 868                 return ret;
 869         }
 870
 871         if ((ret = ehca_create_slab_caches())) {
 872                 ehca_gen_err("Cannot create SLAB caches");
 873                 ret = -ENOMEM;
 874                 goto module_init1;
 875         }
 876
 877         if ((ret = ibmebus_register_driver(&ehca_driver))) {
 878                 ehca_gen_err("Cannot register eHCA device driver");
 879                 ret = -EINVAL;
 880                 goto module_init2;
 881         }
 882
 883         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 884         if (ret) /* only complain; we can live without attributes */
 885                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 886
 887         if (ehca_poll_all_eqs != 1) {
 888                 ehca_gen_err("WARNING!!!");
 889                 ehca_gen_err("It is possible to lose interrupts.");
 890         } else {
 891                 init_timer(&poll_eqs_timer);
 892                 poll_eqs_timer.function = ehca_poll_eqs;
 893                 poll_eqs_timer.expires = jiffies + HZ;
 894                 add_timer(&poll_eqs_timer);
 895         }
 896
 897         return 0;
 898
 899 module_init2:
 900         ehca_destroy_slab_caches();
 901
 902 module_init1:
 903         ehca_destroy_comp_pool();
 904         return ret;
 905 };
 906
 907 void __exit ehca_module_exit(void)
 908 {
 909         if (ehca_poll_all_eqs == 1)
 910                 del_timer_sync(&poll_eqs_timer);
 911
 912         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 913         ibmebus_unregister_driver(&ehca_driver);
 914
 915         ehca_destroy_slab_caches();
 916
 917         ehca_destroy_comp_pool();
 918
 919         idr_destroy(&ehca_cq_idr);
 920         idr_destroy(&ehca_qp_idr);
 921 };
 922
 923 module_init(ehca_module_init);
 924 module_exit(ehca_module_exit);