err.no 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
  47 #include "ehca_classes.h"
  48 #include "ehca_iverbs.h"
  49 #include "ehca_mrmw.h"
  50 #include "ehca_tools.h"
  51 #include "hcp_if.h"
  52
  53 #define HCAD_VERSION "0025"
  54
  55 MODULE_LICENSE("Dual BSD/GPL");
  56 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  57 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  58 MODULE_VERSION(HCAD_VERSION);
  59
  60 int ehca_open_aqp1     = 0;
  61 int ehca_debug_level   = 0;
  62 int ehca_hw_level      = 0;
  63 int ehca_nr_ports      = 2;
  64 int ehca_use_hp_mr     = 0;
  65 int ehca_port_act_time = 30;
  66 int ehca_poll_all_eqs  = 1;
  67 int ehca_static_rate   = -1;
  68 int ehca_scaling_code  = 0;
  69 int ehca_mr_largepage  = 1;
  70 int ehca_lock_hcalls   = -1;
  71
  72 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
  73 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
  74 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
  75 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
  76 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
  77 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
  78 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
  79 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
  80 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
  81 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
  82 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
  83
  84 MODULE_PARM_DESC(open_aqp1,
  85                  "AQP1 on startup (0: no (default), 1: yes)");
  86 MODULE_PARM_DESC(debug_level,
  87                  "debug level"
  88                  " (0: no debug traces (default), 1: with debug traces)");
  89 MODULE_PARM_DESC(hw_level,
  90                  "hardware level"
  91                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
  92 MODULE_PARM_DESC(nr_ports,
  93                  "number of connected ports (-1: autodetect, 1: port one only, "
  94                  "2: two ports (default)");
  95 MODULE_PARM_DESC(use_hp_mr,
  96                  "high performance MRs (0: no (default), 1: yes)");
  97 MODULE_PARM_DESC(port_act_time,
  98                  "time to wait for port activation (default: 30 sec)");
  99 MODULE_PARM_DESC(poll_all_eqs,
 100                  "polls all event queues periodically"
 101                  " (0: no, 1: yes (default))");
 102 MODULE_PARM_DESC(static_rate,
 103                  "set permanent static rate (default: disabled)");
 104 MODULE_PARM_DESC(scaling_code,
 105                  "set scaling code (0: disabled/default, 1: enabled)");
 106 MODULE_PARM_DESC(mr_largepage,
 107                  "use large page for MR (0: use PAGE_SIZE (default), "
 108                  "1: use large page depending on MR size");
 109 MODULE_PARM_DESC(lock_hcalls,
 110                  "serialize all hCalls made by the driver "
 111                  "(default: autodetect)");
 112
 113 DEFINE_RWLOCK(ehca_qp_idr_lock);
 114 DEFINE_RWLOCK(ehca_cq_idr_lock);
 115 DEFINE_IDR(ehca_qp_idr);
 116 DEFINE_IDR(ehca_cq_idr);
 117
 118 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 119 static DEFINE_SPINLOCK(shca_list_lock);
 120
 121 static struct timer_list poll_eqs_timer;
 122
 123 #ifdef CONFIG_PPC_64K_PAGES
 124 static struct kmem_cache *ctblk_cache;
 125
 126 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 127 {
 128         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 129         if (!ret)
 130                 ehca_gen_err("Out of memory for ctblk");
 131         return ret;
 132 }
 133
 134 void ehca_free_fw_ctrlblock(void *ptr)
 135 {
 136         if (ptr)
 137                 kmem_cache_free(ctblk_cache, ptr);
 138
 139 }
 140 #endif
 141
 142 int ehca2ib_return_code(u64 ehca_rc)
 143 {
 144         switch (ehca_rc) {
 145         case H_SUCCESS:
 146                 return 0;
 147         case H_RESOURCE:             /* Resource in use */
 148         case H_BUSY:
 149                 return -EBUSY;
 150         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 151         case H_CONSTRAINED:          /* resource constraint */
 152         case H_NO_MEM:
 153                 return -ENOMEM;
 154         default:
 155                 return -EINVAL;
 156         }
 157 }
 158
 159 static int ehca_create_slab_caches(void)
 160 {
 161         int ret;
 162
 163         ret = ehca_init_pd_cache();
 164         if (ret) {
 165                 ehca_gen_err("Cannot create PD SLAB cache.");
 166                 return ret;
 167         }
 168
 169         ret = ehca_init_cq_cache();
 170         if (ret) {
 171                 ehca_gen_err("Cannot create CQ SLAB cache.");
 172                 goto create_slab_caches2;
 173         }
 174
 175         ret = ehca_init_qp_cache();
 176         if (ret) {
 177                 ehca_gen_err("Cannot create QP SLAB cache.");
 178                 goto create_slab_caches3;
 179         }
 180
 181         ret = ehca_init_av_cache();
 182         if (ret) {
 183                 ehca_gen_err("Cannot create AV SLAB cache.");
 184                 goto create_slab_caches4;
 185         }
 186
 187         ret = ehca_init_mrmw_cache();
 188         if (ret) {
 189                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 190                 goto create_slab_caches5;
 191         }
 192
 193         ret = ehca_init_small_qp_cache();
 194         if (ret) {
 195                 ehca_gen_err("Cannot create small queue SLAB cache.");
 196                 goto create_slab_caches6;
 197         }
 198
 199 #ifdef CONFIG_PPC_64K_PAGES
 200         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 201                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 202                                         SLAB_HWCACHE_ALIGN,
 203                                         NULL);
 204         if (!ctblk_cache) {
 205                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 206                 ehca_cleanup_small_qp_cache();
 207                 goto create_slab_caches6;
 208         }
 209 #endif
 210         return 0;
 211
 212 create_slab_caches6:
 213         ehca_cleanup_mrmw_cache();
 214
 215 create_slab_caches5:
 216         ehca_cleanup_av_cache();
 217
 218 create_slab_caches4:
 219         ehca_cleanup_qp_cache();
 220
 221 create_slab_caches3:
 222         ehca_cleanup_cq_cache();
 223
 224 create_slab_caches2:
 225         ehca_cleanup_pd_cache();
 226
 227         return ret;
 228 }
 229
 230 static void ehca_destroy_slab_caches(void)
 231 {
 232         ehca_cleanup_small_qp_cache();
 233         ehca_cleanup_mrmw_cache();
 234         ehca_cleanup_av_cache();
 235         ehca_cleanup_qp_cache();
 236         ehca_cleanup_cq_cache();
 237         ehca_cleanup_pd_cache();
 238 #ifdef CONFIG_PPC_64K_PAGES
 239         if (ctblk_cache)
 240                 kmem_cache_destroy(ctblk_cache);
 241 #endif
 242 }
 243
 244 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 245 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 246
 247 static struct cap_descr {
 248         u64 mask;
 249         char *descr;
 250 } hca_cap_descr[] = {
 251         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 252         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 253         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 254         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 255         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 256         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 257         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 258         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 259         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 260         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 261         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 262         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 263         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 264         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 265         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 266         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 267         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 268         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 269 };
 270
 271 static int ehca_sense_attributes(struct ehca_shca *shca)
 272 {
 273         int i, ret = 0;
 274         u64 h_ret;
 275         struct hipz_query_hca *rblock;
 276         struct hipz_query_port *port;
 277
 278         static const u32 pgsize_map[] = {
 279                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 280                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 281                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 282                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 283         };
 284
 285         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 286         if (!rblock) {
 287                 ehca_gen_err("Cannot allocate rblock memory.");
 288                 return -ENOMEM;
 289         }
 290
 291         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 292         if (h_ret != H_SUCCESS) {
 293                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 294                              h_ret);
 295                 ret = -EPERM;
 296                 goto sense_attributes1;
 297         }
 298
 299         if (ehca_nr_ports == 1)
 300                 shca->num_ports = 1;
 301         else
 302                 shca->num_ports = (u8)rblock->num_ports;
 303
 304         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 305
 306         if (ehca_hw_level == 0) {
 307                 u32 hcaaver;
 308                 u32 revid;
 309
 310                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 311                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 312
 313                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 314
 315                 if (hcaaver == 1) {
 316                         if (revid <= 3)
 317                                 shca->hw_level = 0x10 | (revid + 1);
 318                         else
 319                                 shca->hw_level = 0x14;
 320                 } else if (hcaaver == 2) {
 321                         if (revid == 0)
 322                                 shca->hw_level = 0x21;
 323                         else if (revid == 0x10)
 324                                 shca->hw_level = 0x22;
 325                         else if (revid == 0x20 || revid == 0x21)
 326                                 shca->hw_level = 0x23;
 327                 }
 328
 329                 if (!shca->hw_level) {
 330                         ehca_gen_warn("unknown hardware version"
 331                                       " - assuming default level");
 332                         shca->hw_level = 0x22;
 333                 }
 334         } else
 335                 shca->hw_level = ehca_hw_level;
 336         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 337
 338         shca->hca_cap = rblock->hca_cap_indicators;
 339         ehca_gen_dbg(" ... HCA capabilities:");
 340         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 341                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 342                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 343
 344         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 345          * a firmware property, so it's valid across all adapters
 346          */
 347         if (ehca_lock_hcalls == -1)
 348                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
 349
 350         /* translate supported MR page sizes; always support 4K */
 351         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 352         if (ehca_mr_largepage) { /* support extra sizes only if enabled */
 353                 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 354                         if (rblock->memory_page_size_supported & pgsize_map[i])
 355                                 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 356         }
 357
 358         /* query max MTU from first port -- it's the same for all ports */
 359         port = (struct hipz_query_port *)rblock;
 360         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 361         if (h_ret != H_SUCCESS) {
 362                 ehca_gen_err("Cannot query port properties. h_ret=%li",
 363                              h_ret);
 364                 ret = -EPERM;
 365                 goto sense_attributes1;
 366         }
 367
 368         shca->max_mtu = port->max_mtu;
 369
 370 sense_attributes1:
 371         ehca_free_fw_ctrlblock(rblock);
 372         return ret;
 373 }
 374
 375 static int init_node_guid(struct ehca_shca *shca)
 376 {
 377         int ret = 0;
 378         struct hipz_query_hca *rblock;
 379
 380         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 381         if (!rblock) {
 382                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 383                 return -ENOMEM;
 384         }
 385
 386         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 387                 ehca_err(&shca->ib_device, "Can't query device properties");
 388                 ret = -EINVAL;
 389                 goto init_node_guid1;
 390         }
 391
 392         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 393
 394 init_node_guid1:
 395         ehca_free_fw_ctrlblock(rblock);
 396         return ret;
 397 }
 398
 399 int ehca_init_device(struct ehca_shca *shca)
 400 {
 401         int ret;
 402
 403         ret = init_node_guid(shca);
 404         if (ret)
 405                 return ret;
 406
 407         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 408         shca->ib_device.owner               = THIS_MODULE;
 409
 410         shca->ib_device.uverbs_abi_ver      = 8;
 411         shca->ib_device.uverbs_cmd_mask     =
 412                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 413                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 414                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 415                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 416                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 417                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 418                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 419                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 420                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 421                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 422                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 423                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 424                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 425                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 426                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 427                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 428
 429         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 430         shca->ib_device.phys_port_cnt       = shca->num_ports;
 431         shca->ib_device.num_comp_vectors    = 1;
 432         shca->ib_device.dma_device          = &shca->ofdev->dev;
 433         shca->ib_device.query_device        = ehca_query_device;
 434         shca->ib_device.query_port          = ehca_query_port;
 435         shca->ib_device.query_gid           = ehca_query_gid;
 436         shca->ib_device.query_pkey          = ehca_query_pkey;
 437         /* shca->in_device.modify_device    = ehca_modify_device    */
 438         shca->ib_device.modify_port         = ehca_modify_port;
 439         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 440         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 441         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 442         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 443         shca->ib_device.create_ah           = ehca_create_ah;
 444         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 445         shca->ib_device.query_ah            = ehca_query_ah;
 446         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 447         shca->ib_device.create_qp           = ehca_create_qp;
 448         shca->ib_device.modify_qp           = ehca_modify_qp;
 449         shca->ib_device.query_qp            = ehca_query_qp;
 450         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 451         shca->ib_device.post_send           = ehca_post_send;
 452         shca->ib_device.post_recv           = ehca_post_recv;
 453         shca->ib_device.create_cq           = ehca_create_cq;
 454         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 455         shca->ib_device.resize_cq           = ehca_resize_cq;
 456         shca->ib_device.poll_cq             = ehca_poll_cq;
 457         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 458         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 459         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 460         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 461         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 462         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 463         shca->ib_device.query_mr            = ehca_query_mr;
 464         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 465         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 466         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 467         shca->ib_device.bind_mw             = ehca_bind_mw;
 468         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 469         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 470         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 471         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 472         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 473         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 474         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 475         shca->ib_device.process_mad         = ehca_process_mad;
 476         shca->ib_device.mmap                = ehca_mmap;
 477
 478         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 479                 shca->ib_device.uverbs_cmd_mask |=
 480                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 481                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 482                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 483                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 484
 485                 shca->ib_device.create_srq          = ehca_create_srq;
 486                 shca->ib_device.modify_srq          = ehca_modify_srq;
 487                 shca->ib_device.query_srq           = ehca_query_srq;
 488                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 489                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 490         }
 491
 492         return ret;
 493 }
 494
 495 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 496 {
 497         struct ehca_sport *sport = &shca->sport[port - 1];
 498         struct ib_cq *ibcq;
 499         struct ib_qp *ibqp;
 500         struct ib_qp_init_attr qp_init_attr;
 501         int ret;
 502
 503         if (sport->ibcq_aqp1) {
 504                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 505                 return -EPERM;
 506         }
 507
 508         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 509         if (IS_ERR(ibcq)) {
 510                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 511                 return PTR_ERR(ibcq);
 512         }
 513         sport->ibcq_aqp1 = ibcq;
 514
 515         if (sport->ibqp_sqp[IB_QPT_GSI]) {
 516                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 517                 ret = -EPERM;
 518                 goto create_aqp1;
 519         }
 520
 521         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 522         qp_init_attr.send_cq          = ibcq;
 523         qp_init_attr.recv_cq          = ibcq;
 524         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 525         qp_init_attr.cap.max_send_wr  = 100;
 526         qp_init_attr.cap.max_recv_wr  = 100;
 527         qp_init_attr.cap.max_send_sge = 2;
 528         qp_init_attr.cap.max_recv_sge = 1;
 529         qp_init_attr.qp_type          = IB_QPT_GSI;
 530         qp_init_attr.port_num         = port;
 531         qp_init_attr.qp_context       = NULL;
 532         qp_init_attr.event_handler    = NULL;
 533         qp_init_attr.srq              = NULL;
 534
 535         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 536         if (IS_ERR(ibqp)) {
 537                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 538                 ret = PTR_ERR(ibqp);
 539                 goto create_aqp1;
 540         }
 541         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
 542
 543         return 0;
 544
 545 create_aqp1:
 546         ib_destroy_cq(sport->ibcq_aqp1);
 547         return ret;
 548 }
 549
 550 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 551 {
 552         int ret;
 553
 554         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
 555         if (ret) {
 556                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 557                 return ret;
 558         }
 559
 560         ret = ib_destroy_cq(sport->ibcq_aqp1);
 561         if (ret)
 562                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 563
 564         return ret;
 565 }
 566
 567 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 568 {
 569         return snprintf(buf, PAGE_SIZE, "%d\n",
 570                         ehca_debug_level);
 571 }
 572
 573 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 574                                       const char *buf, size_t count)
 575 {
 576         int value = (*buf) - '0';
 577         if (value >= 0 && value <= 9)
 578                 ehca_debug_level = value;
 579         return 1;
 580 }
 581
 582 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 583             ehca_show_debug_level, ehca_store_debug_level);
 584
 585 static struct attribute *ehca_drv_attrs[] = {
 586         &driver_attr_debug_level.attr,
 587         NULL
 588 };
 589
 590 static struct attribute_group ehca_drv_attr_grp = {
 591         .attrs = ehca_drv_attrs
 592 };
 593
 594 static struct attribute_group *ehca_drv_attr_groups[] = {
 595         &ehca_drv_attr_grp,
 596         NULL,
 597 };
 598
 599 #define EHCA_RESOURCE_ATTR(name)                                           \
 600 static ssize_t  ehca_show_##name(struct device *dev,                       \
 601                                  struct device_attribute *attr,            \
 602                                  char *buf)                                \
 603 {                                                                          \
 604         struct ehca_shca *shca;                                            \
 605         struct hipz_query_hca *rblock;                                     \
 606         int data;                                                          \
 607                                                                            \
 608         shca = dev->driver_data;                                           \
 609                                                                            \
 610         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 611         if (!rblock) {                                                     \
 612                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 613                 return 0;                                                  \
 614         }                                                                  \
 615                                                                            \
 616         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 617                 dev_err(dev, "Can't query device properties\n");           \
 618                 ehca_free_fw_ctrlblock(rblock);                            \
 619                 return 0;                                                  \
 620         }                                                                  \
 621                                                                            \
 622         data = rblock->name;                                               \
 623         ehca_free_fw_ctrlblock(rblock);                                    \
 624                                                                            \
 625         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 626                 return snprintf(buf, 256, "1\n");                          \
 627         else                                                               \
 628                 return snprintf(buf, 256, "%d\n", data);                   \
 629                                                                            \
 630 }                                                                          \
 631 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 632
 633 EHCA_RESOURCE_ATTR(num_ports);
 634 EHCA_RESOURCE_ATTR(hw_ver);
 635 EHCA_RESOURCE_ATTR(max_eq);
 636 EHCA_RESOURCE_ATTR(cur_eq);
 637 EHCA_RESOURCE_ATTR(max_cq);
 638 EHCA_RESOURCE_ATTR(cur_cq);
 639 EHCA_RESOURCE_ATTR(max_qp);
 640 EHCA_RESOURCE_ATTR(cur_qp);
 641 EHCA_RESOURCE_ATTR(max_mr);
 642 EHCA_RESOURCE_ATTR(cur_mr);
 643 EHCA_RESOURCE_ATTR(max_mw);
 644 EHCA_RESOURCE_ATTR(cur_mw);
 645 EHCA_RESOURCE_ATTR(max_pd);
 646 EHCA_RESOURCE_ATTR(max_ah);
 647
 648 static ssize_t ehca_show_adapter_handle(struct device *dev,
 649                                         struct device_attribute *attr,
 650                                         char *buf)
 651 {
 652         struct ehca_shca *shca = dev->driver_data;
 653
 654         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 655
 656 }
 657 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 658
 659 static ssize_t ehca_show_mr_largepage(struct device *dev,
 660                                       struct device_attribute *attr,
 661                                       char *buf)
 662 {
 663         return sprintf(buf, "%d\n", ehca_mr_largepage);
 664 }
 665 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
 666
 667 static struct attribute *ehca_dev_attrs[] = {
 668         &dev_attr_adapter_handle.attr,
 669         &dev_attr_num_ports.attr,
 670         &dev_attr_hw_ver.attr,
 671         &dev_attr_max_eq.attr,
 672         &dev_attr_cur_eq.attr,
 673         &dev_attr_max_cq.attr,
 674         &dev_attr_cur_cq.attr,
 675         &dev_attr_max_qp.attr,
 676         &dev_attr_cur_qp.attr,
 677         &dev_attr_max_mr.attr,
 678         &dev_attr_cur_mr.attr,
 679         &dev_attr_max_mw.attr,
 680         &dev_attr_cur_mw.attr,
 681         &dev_attr_max_pd.attr,
 682         &dev_attr_max_ah.attr,
 683         &dev_attr_mr_largepage.attr,
 684         NULL
 685 };
 686
 687 static struct attribute_group ehca_dev_attr_grp = {
 688         .attrs = ehca_dev_attrs
 689 };
 690
 691 static int __devinit ehca_probe(struct of_device *dev,
 692                                 const struct of_device_id *id)
 693 {
 694         struct ehca_shca *shca;
 695         const u64 *handle;
 696         struct ib_pd *ibpd;
 697         int ret, i;
 698
 699         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 700         if (!handle) {
 701                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 702                              dev->node->full_name);
 703                 return -ENODEV;
 704         }
 705
 706         if (!(*handle)) {
 707                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 708                              dev->node->full_name);
 709                 return -ENODEV;
 710         }
 711
 712         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 713         if (!shca) {
 714                 ehca_gen_err("Cannot allocate shca memory.");
 715                 return -ENOMEM;
 716         }
 717         mutex_init(&shca->modify_mutex);
 718         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 719                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
 720
 721         shca->ofdev = dev;
 722         shca->ipz_hca_handle.handle = *handle;
 723         dev->dev.driver_data = shca;
 724
 725         ret = ehca_sense_attributes(shca);
 726         if (ret < 0) {
 727                 ehca_gen_err("Cannot sense eHCA attributes.");
 728                 goto probe1;
 729         }
 730
 731         ret = ehca_init_device(shca);
 732         if (ret) {
 733                 ehca_gen_err("Cannot init ehca  device struct");
 734                 goto probe1;
 735         }
 736
 737         /* create event queues */
 738         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 739         if (ret) {
 740                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 741                 goto probe1;
 742         }
 743
 744         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 745         if (ret) {
 746                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 747                 goto probe3;
 748         }
 749
 750         /* create internal protection domain */
 751         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 752         if (IS_ERR(ibpd)) {
 753                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 754                 ret = PTR_ERR(ibpd);
 755                 goto probe4;
 756         }
 757
 758         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 759         shca->pd->ib_pd.device = &shca->ib_device;
 760
 761         /* create internal max MR */
 762         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 763
 764         if (ret) {
 765                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 766                          ret);
 767                 goto probe5;
 768         }
 769
 770         ret = ib_register_device(&shca->ib_device);
 771         if (ret) {
 772                 ehca_err(&shca->ib_device,
 773                          "ib_register_device() failed ret=%i", ret);
 774                 goto probe6;
 775         }
 776
 777         /* create AQP1 for port 1 */
 778         if (ehca_open_aqp1 == 1) {
 779                 shca->sport[0].port_state = IB_PORT_DOWN;
 780                 ret = ehca_create_aqp1(shca, 1);
 781                 if (ret) {
 782                         ehca_err(&shca->ib_device,
 783                                  "Cannot create AQP1 for port 1.");
 784                         goto probe7;
 785                 }
 786         }
 787
 788         /* create AQP1 for port 2 */
 789         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 790                 shca->sport[1].port_state = IB_PORT_DOWN;
 791                 ret = ehca_create_aqp1(shca, 2);
 792                 if (ret) {
 793                         ehca_err(&shca->ib_device,
 794                                  "Cannot create AQP1 for port 2.");
 795                         goto probe8;
 796                 }
 797         }
 798
 799         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 800         if (ret) /* only complain; we can live without attributes */
 801                 ehca_err(&shca->ib_device,
 802                          "Cannot create device attributes  ret=%d", ret);
 803
 804         spin_lock(&shca_list_lock);
 805         list_add(&shca->shca_list, &shca_list);
 806         spin_unlock(&shca_list_lock);
 807
 808         return 0;
 809
 810 probe8:
 811         ret = ehca_destroy_aqp1(&shca->sport[0]);
 812         if (ret)
 813                 ehca_err(&shca->ib_device,
 814                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 815
 816 probe7:
 817         ib_unregister_device(&shca->ib_device);
 818
 819 probe6:
 820         ret = ehca_dereg_internal_maxmr(shca);
 821         if (ret)
 822                 ehca_err(&shca->ib_device,
 823                          "Cannot destroy internal MR. ret=%x", ret);
 824
 825 probe5:
 826         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 827         if (ret)
 828                 ehca_err(&shca->ib_device,
 829                          "Cannot destroy internal PD. ret=%x", ret);
 830
 831 probe4:
 832         ret = ehca_destroy_eq(shca, &shca->neq);
 833         if (ret)
 834                 ehca_err(&shca->ib_device,
 835                          "Cannot destroy NEQ. ret=%x", ret);
 836
 837 probe3:
 838         ret = ehca_destroy_eq(shca, &shca->eq);
 839         if (ret)
 840                 ehca_err(&shca->ib_device,
 841                          "Cannot destroy EQ. ret=%x", ret);
 842
 843 probe1:
 844         ib_dealloc_device(&shca->ib_device);
 845
 846         return -EINVAL;
 847 }
 848
 849 static int __devexit ehca_remove(struct of_device *dev)
 850 {
 851         struct ehca_shca *shca = dev->dev.driver_data;
 852         int ret;
 853
 854         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 855
 856         if (ehca_open_aqp1 == 1) {
 857                 int i;
 858                 for (i = 0; i < shca->num_ports; i++) {
 859                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 860                         if (ret)
 861                                 ehca_err(&shca->ib_device,
 862                                          "Cannot destroy AQP1 for port %x "
 863                                          "ret=%i", ret, i);
 864                 }
 865         }
 866
 867         ib_unregister_device(&shca->ib_device);
 868
 869         ret = ehca_dereg_internal_maxmr(shca);
 870         if (ret)
 871                 ehca_err(&shca->ib_device,
 872                          "Cannot destroy internal MR. ret=%i", ret);
 873
 874         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 875         if (ret)
 876                 ehca_err(&shca->ib_device,
 877                          "Cannot destroy internal PD. ret=%i", ret);
 878
 879         ret = ehca_destroy_eq(shca, &shca->eq);
 880         if (ret)
 881                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 882
 883         ret = ehca_destroy_eq(shca, &shca->neq);
 884         if (ret)
 885                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 886
 887         ib_dealloc_device(&shca->ib_device);
 888
 889         spin_lock(&shca_list_lock);
 890         list_del(&shca->shca_list);
 891         spin_unlock(&shca_list_lock);
 892
 893         return ret;
 894 }
 895
 896 static struct of_device_id ehca_device_table[] =
 897 {
 898         {
 899                 .name       = "lhca",
 900                 .compatible = "IBM,lhca",
 901         },
 902         {},
 903 };
 904
 905 static struct of_platform_driver ehca_driver = {
 906         .name        = "ehca",
 907         .match_table = ehca_device_table,
 908         .probe       = ehca_probe,
 909         .remove      = ehca_remove,
 910         .driver      = {
 911                 .groups = ehca_drv_attr_groups,
 912         },
 913 };
 914
 915 void ehca_poll_eqs(unsigned long data)
 916 {
 917         struct ehca_shca *shca;
 918
 919         spin_lock(&shca_list_lock);
 920         list_for_each_entry(shca, &shca_list, shca_list) {
 921                 if (shca->eq.is_initialized) {
 922                         /* call deadman proc only if eq ptr does not change */
 923                         struct ehca_eq *eq = &shca->eq;
 924                         int max = 3;
 925                         volatile u64 q_ofs, q_ofs2;
 926                         u64 flags;
 927                         spin_lock_irqsave(&eq->spinlock, flags);
 928                         q_ofs = eq->ipz_queue.current_q_offset;
 929                         spin_unlock_irqrestore(&eq->spinlock, flags);
 930                         do {
 931                                 spin_lock_irqsave(&eq->spinlock, flags);
 932                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 933                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 934                                 max--;
 935                         } while (q_ofs == q_ofs2 && max > 0);
 936                         if (q_ofs == q_ofs2)
 937                                 ehca_process_eq(shca, 0);
 938                 }
 939         }
 940         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
 941         spin_unlock(&shca_list_lock);
 942 }
 943
 944 int __init ehca_module_init(void)
 945 {
 946         int ret;
 947
 948         printk(KERN_INFO "eHCA Infiniband Device Driver "
 949                "(Version " HCAD_VERSION ")\n");
 950
 951         ret = ehca_create_comp_pool();
 952         if (ret) {
 953                 ehca_gen_err("Cannot create comp pool.");
 954                 return ret;
 955         }
 956
 957         ret = ehca_create_slab_caches();
 958         if (ret) {
 959                 ehca_gen_err("Cannot create SLAB caches");
 960                 ret = -ENOMEM;
 961                 goto module_init1;
 962         }
 963
 964         ret = ibmebus_register_driver(&ehca_driver);
 965         if (ret) {
 966                 ehca_gen_err("Cannot register eHCA device driver");
 967                 ret = -EINVAL;
 968                 goto module_init2;
 969         }
 970
 971         if (ehca_poll_all_eqs != 1) {
 972                 ehca_gen_err("WARNING!!!");
 973                 ehca_gen_err("It is possible to lose interrupts.");
 974         } else {
 975                 init_timer(&poll_eqs_timer);
 976                 poll_eqs_timer.function = ehca_poll_eqs;
 977                 poll_eqs_timer.expires = jiffies + HZ;
 978                 add_timer(&poll_eqs_timer);
 979         }
 980
 981         return 0;
 982
 983 module_init2:
 984         ehca_destroy_slab_caches();
 985
 986 module_init1:
 987         ehca_destroy_comp_pool();
 988         return ret;
 989 };
 990
 991 void __exit ehca_module_exit(void)
 992 {
 993         if (ehca_poll_all_eqs == 1)
 994                 del_timer_sync(&poll_eqs_timer);
 995
 996         ibmebus_unregister_driver(&ehca_driver);
 997
 998         ehca_destroy_slab_caches();
 999
1000         ehca_destroy_comp_pool();
1001
1002         idr_destroy(&ehca_cq_idr);
1003         idr_destroy(&ehca_qp_idr);
1004 };
1005
1006 module_init(ehca_module_init);
1007 module_exit(ehca_module_exit);