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;
 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);
 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) {
 267                         if (revid <= 3)
 268                                 shca->hw_level = 0x10 | (revid + 1);
 269                         else
 270                                 shca->hw_level = 0x14;
 271                 } else if (hcaaver == 2) {
 272                         if (revid == 0)
 273                                 shca->hw_level = 0x21;
 274                         else if (revid == 0x10)
 275                                 shca->hw_level = 0x22;
 276                         else if (revid == 0x20 || revid == 0x21)
 277                                 shca->hw_level = 0x23;
 278                 }
 279
 280                 if (!shca->hw_level) {
 281                         ehca_gen_warn("unknown hardware version"
 282                                       " - assuming default level");
 283                         shca->hw_level = 0x22;
 284                 }
 285         } else
 286                 shca->hw_level = ehca_hw_level;
 287         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 288
 289         shca->sport[0].rate = IB_RATE_30_GBPS;
 290         shca->sport[1].rate = IB_RATE_30_GBPS;
 291
 292         shca->hca_cap = rblock->hca_cap_indicators;
 293         ehca_gen_dbg(" ... HCA capabilities:");
 294         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 295                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 296                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 297
 298         port = (struct hipz_query_port *)rblock;
 299         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 300         if (h_ret != H_SUCCESS) {
 301                 ehca_gen_err("Cannot query port properties. h_ret=%lx",
 302                              h_ret);
 303                 ret = -EPERM;
 304                 goto sense_attributes1;
 305         }
 306
 307         shca->max_mtu = port->max_mtu;
 308
 309 sense_attributes1:
 310         ehca_free_fw_ctrlblock(rblock);
 311         return ret;
 312 }
 313
 314 static int init_node_guid(struct ehca_shca *shca)
 315 {
 316         int ret = 0;
 317         struct hipz_query_hca *rblock;
 318
 319         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 320         if (!rblock) {
 321                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 322                 return -ENOMEM;
 323         }
 324
 325         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 326                 ehca_err(&shca->ib_device, "Can't query device properties");
 327                 ret = -EINVAL;
 328                 goto init_node_guid1;
 329         }
 330
 331         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 332
 333 init_node_guid1:
 334         ehca_free_fw_ctrlblock(rblock);
 335         return ret;
 336 }
 337
 338 int ehca_init_device(struct ehca_shca *shca)
 339 {
 340         int ret;
 341
 342         ret = init_node_guid(shca);
 343         if (ret)
 344                 return ret;
 345
 346         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 347         shca->ib_device.owner               = THIS_MODULE;
 348
 349         shca->ib_device.uverbs_abi_ver      = 7;
 350         shca->ib_device.uverbs_cmd_mask     =
 351                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 352                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 353                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 354                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 355                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 356                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 357                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 358                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 359                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 360                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 361                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 362                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 363                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 364                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 365                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 366                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 367
 368         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 369         shca->ib_device.phys_port_cnt       = shca->num_ports;
 370         shca->ib_device.num_comp_vectors    = 1;
 371         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
 372         shca->ib_device.query_device        = ehca_query_device;
 373         shca->ib_device.query_port          = ehca_query_port;
 374         shca->ib_device.query_gid           = ehca_query_gid;
 375         shca->ib_device.query_pkey          = ehca_query_pkey;
 376         /* shca->in_device.modify_device    = ehca_modify_device    */
 377         shca->ib_device.modify_port         = ehca_modify_port;
 378         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 379         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 380         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 381         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 382         shca->ib_device.create_ah           = ehca_create_ah;
 383         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 384         shca->ib_device.query_ah            = ehca_query_ah;
 385         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 386         shca->ib_device.create_qp           = ehca_create_qp;
 387         shca->ib_device.modify_qp           = ehca_modify_qp;
 388         shca->ib_device.query_qp            = ehca_query_qp;
 389         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 390         shca->ib_device.post_send           = ehca_post_send;
 391         shca->ib_device.post_recv           = ehca_post_recv;
 392         shca->ib_device.create_cq           = ehca_create_cq;
 393         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 394         shca->ib_device.resize_cq           = ehca_resize_cq;
 395         shca->ib_device.poll_cq             = ehca_poll_cq;
 396         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 397         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 398         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 399         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 400         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 401         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 402         shca->ib_device.query_mr            = ehca_query_mr;
 403         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 404         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 405         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 406         shca->ib_device.bind_mw             = ehca_bind_mw;
 407         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 408         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 409         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 410         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 411         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 412         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 413         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 414         /* shca->ib_device.process_mad      = ehca_process_mad;     */
 415         shca->ib_device.mmap                = ehca_mmap;
 416
 417         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 418                 shca->ib_device.uverbs_cmd_mask |=
 419                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 420                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 421                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 422                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 423
 424                 shca->ib_device.create_srq          = ehca_create_srq;
 425                 shca->ib_device.modify_srq          = ehca_modify_srq;
 426                 shca->ib_device.query_srq           = ehca_query_srq;
 427                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 428                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 429         }
 430
 431         return ret;
 432 }
 433
 434 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 435 {
 436         struct ehca_sport *sport = &shca->sport[port - 1];
 437         struct ib_cq *ibcq;
 438         struct ib_qp *ibqp;
 439         struct ib_qp_init_attr qp_init_attr;
 440         int ret;
 441
 442         if (sport->ibcq_aqp1) {
 443                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 444                 return -EPERM;
 445         }
 446
 447         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 448         if (IS_ERR(ibcq)) {
 449                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 450                 return PTR_ERR(ibcq);
 451         }
 452         sport->ibcq_aqp1 = ibcq;
 453
 454         if (sport->ibqp_aqp1) {
 455                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 456                 ret = -EPERM;
 457                 goto create_aqp1;
 458         }
 459
 460         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 461         qp_init_attr.send_cq          = ibcq;
 462         qp_init_attr.recv_cq          = ibcq;
 463         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 464         qp_init_attr.cap.max_send_wr  = 100;
 465         qp_init_attr.cap.max_recv_wr  = 100;
 466         qp_init_attr.cap.max_send_sge = 2;
 467         qp_init_attr.cap.max_recv_sge = 1;
 468         qp_init_attr.qp_type          = IB_QPT_GSI;
 469         qp_init_attr.port_num         = port;
 470         qp_init_attr.qp_context       = NULL;
 471         qp_init_attr.event_handler    = NULL;
 472         qp_init_attr.srq              = NULL;
 473
 474         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 475         if (IS_ERR(ibqp)) {
 476                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 477                 ret = PTR_ERR(ibqp);
 478                 goto create_aqp1;
 479         }
 480         sport->ibqp_aqp1 = ibqp;
 481
 482         return 0;
 483
 484 create_aqp1:
 485         ib_destroy_cq(sport->ibcq_aqp1);
 486         return ret;
 487 }
 488
 489 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 490 {
 491         int ret;
 492
 493         ret = ib_destroy_qp(sport->ibqp_aqp1);
 494         if (ret) {
 495                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
 496                 return ret;
 497         }
 498
 499         ret = ib_destroy_cq(sport->ibcq_aqp1);
 500         if (ret)
 501                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
 502
 503         return ret;
 504 }
 505
 506 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 507 {
 508         return snprintf(buf, PAGE_SIZE, "%d\n",
 509                         ehca_debug_level);
 510 }
 511
 512 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 513                                       const char *buf, size_t count)
 514 {
 515         int value = (*buf) - '0';
 516         if (value >= 0 && value <= 9)
 517                 ehca_debug_level = value;
 518         return 1;
 519 }
 520
 521 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 522             ehca_show_debug_level, ehca_store_debug_level);
 523
 524 static struct attribute *ehca_drv_attrs[] = {
 525         &driver_attr_debug_level.attr,
 526         NULL
 527 };
 528
 529 static struct attribute_group ehca_drv_attr_grp = {
 530         .attrs = ehca_drv_attrs
 531 };
 532
 533 #define EHCA_RESOURCE_ATTR(name)                                           \
 534 static ssize_t  ehca_show_##name(struct device *dev,                       \
 535                                  struct device_attribute *attr,            \
 536                                  char *buf)                                \
 537 {                                                                          \
 538         struct ehca_shca *shca;                                            \
 539         struct hipz_query_hca *rblock;                                     \
 540         int data;                                                          \
 541                                                                            \
 542         shca = dev->driver_data;                                           \
 543                                                                            \
 544         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 545         if (!rblock) {                                                     \
 546                 dev_err(dev, "Can't allocate rblock memory.");             \
 547                 return 0;                                                  \
 548         }                                                                  \
 549                                                                            \
 550         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 551                 dev_err(dev, "Can't query device properties");             \
 552                 ehca_free_fw_ctrlblock(rblock);                            \
 553                 return 0;                                                  \
 554         }                                                                  \
 555                                                                            \
 556         data = rblock->name;                                               \
 557         ehca_free_fw_ctrlblock(rblock);                                    \
 558                                                                            \
 559         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 560                 return snprintf(buf, 256, "1\n");                          \
 561         else                                                               \
 562                 return snprintf(buf, 256, "%d\n", data);                   \
 563                                                                            \
 564 }                                                                          \
 565 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 566
 567 EHCA_RESOURCE_ATTR(num_ports);
 568 EHCA_RESOURCE_ATTR(hw_ver);
 569 EHCA_RESOURCE_ATTR(max_eq);
 570 EHCA_RESOURCE_ATTR(cur_eq);
 571 EHCA_RESOURCE_ATTR(max_cq);
 572 EHCA_RESOURCE_ATTR(cur_cq);
 573 EHCA_RESOURCE_ATTR(max_qp);
 574 EHCA_RESOURCE_ATTR(cur_qp);
 575 EHCA_RESOURCE_ATTR(max_mr);
 576 EHCA_RESOURCE_ATTR(cur_mr);
 577 EHCA_RESOURCE_ATTR(max_mw);
 578 EHCA_RESOURCE_ATTR(cur_mw);
 579 EHCA_RESOURCE_ATTR(max_pd);
 580 EHCA_RESOURCE_ATTR(max_ah);
 581
 582 static ssize_t ehca_show_adapter_handle(struct device *dev,
 583                                         struct device_attribute *attr,
 584                                         char *buf)
 585 {
 586         struct ehca_shca *shca = dev->driver_data;
 587
 588         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 589
 590 }
 591 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 592
 593 static struct attribute *ehca_dev_attrs[] = {
 594         &dev_attr_adapter_handle.attr,
 595         &dev_attr_num_ports.attr,
 596         &dev_attr_hw_ver.attr,
 597         &dev_attr_max_eq.attr,
 598         &dev_attr_cur_eq.attr,
 599         &dev_attr_max_cq.attr,
 600         &dev_attr_cur_cq.attr,
 601         &dev_attr_max_qp.attr,
 602         &dev_attr_cur_qp.attr,
 603         &dev_attr_max_mr.attr,
 604         &dev_attr_cur_mr.attr,
 605         &dev_attr_max_mw.attr,
 606         &dev_attr_cur_mw.attr,
 607         &dev_attr_max_pd.attr,
 608         &dev_attr_max_ah.attr,
 609         NULL
 610 };
 611
 612 static struct attribute_group ehca_dev_attr_grp = {
 613         .attrs = ehca_dev_attrs
 614 };
 615
 616 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 617                                 const struct of_device_id *id)
 618 {
 619         struct ehca_shca *shca;
 620         const u64 *handle;
 621         struct ib_pd *ibpd;
 622         int ret;
 623
 624         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
 625         if (!handle) {
 626                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 627                              dev->ofdev.node->full_name);
 628                 return -ENODEV;
 629         }
 630
 631         if (!(*handle)) {
 632                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 633                              dev->ofdev.node->full_name);
 634                 return -ENODEV;
 635         }
 636
 637         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 638         if (!shca) {
 639                 ehca_gen_err("Cannot allocate shca memory.");
 640                 return -ENOMEM;
 641         }
 642         mutex_init(&shca->modify_mutex);
 643
 644         shca->ibmebus_dev = dev;
 645         shca->ipz_hca_handle.handle = *handle;
 646         dev->ofdev.dev.driver_data = shca;
 647
 648         ret = ehca_sense_attributes(shca);
 649         if (ret < 0) {
 650                 ehca_gen_err("Cannot sense eHCA attributes.");
 651                 goto probe1;
 652         }
 653
 654         ret = ehca_init_device(shca);
 655         if (ret) {
 656                 ehca_gen_err("Cannot init ehca  device struct");
 657                 goto probe1;
 658         }
 659
 660         /* create event queues */
 661         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
 662         if (ret) {
 663                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 664                 goto probe1;
 665         }
 666
 667         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 668         if (ret) {
 669                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 670                 goto probe3;
 671         }
 672
 673         /* create internal protection domain */
 674         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 675         if (IS_ERR(ibpd)) {
 676                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 677                 ret = PTR_ERR(ibpd);
 678                 goto probe4;
 679         }
 680
 681         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 682         shca->pd->ib_pd.device = &shca->ib_device;
 683
 684         /* create internal max MR */
 685         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 686
 687         if (ret) {
 688                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
 689                          ret);
 690                 goto probe5;
 691         }
 692
 693         ret = ib_register_device(&shca->ib_device);
 694         if (ret) {
 695                 ehca_err(&shca->ib_device,
 696                          "ib_register_device() failed ret=%x", ret);
 697                 goto probe6;
 698         }
 699
 700         /* create AQP1 for port 1 */
 701         if (ehca_open_aqp1 == 1) {
 702                 shca->sport[0].port_state = IB_PORT_DOWN;
 703                 ret = ehca_create_aqp1(shca, 1);
 704                 if (ret) {
 705                         ehca_err(&shca->ib_device,
 706                                  "Cannot create AQP1 for port 1.");
 707                         goto probe7;
 708                 }
 709         }
 710
 711         /* create AQP1 for port 2 */
 712         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 713                 shca->sport[1].port_state = IB_PORT_DOWN;
 714                 ret = ehca_create_aqp1(shca, 2);
 715                 if (ret) {
 716                         ehca_err(&shca->ib_device,
 717                                  "Cannot create AQP1 for port 2.");
 718                         goto probe8;
 719                 }
 720         }
 721
 722         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 723         if (ret) /* only complain; we can live without attributes */
 724                 ehca_err(&shca->ib_device,
 725                          "Cannot create device attributes  ret=%d", ret);
 726
 727         spin_lock(&shca_list_lock);
 728         list_add(&shca->shca_list, &shca_list);
 729         spin_unlock(&shca_list_lock);
 730
 731         return 0;
 732
 733 probe8:
 734         ret = ehca_destroy_aqp1(&shca->sport[0]);
 735         if (ret)
 736                 ehca_err(&shca->ib_device,
 737                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
 738
 739 probe7:
 740         ib_unregister_device(&shca->ib_device);
 741
 742 probe6:
 743         ret = ehca_dereg_internal_maxmr(shca);
 744         if (ret)
 745                 ehca_err(&shca->ib_device,
 746                          "Cannot destroy internal MR. ret=%x", ret);
 747
 748 probe5:
 749         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 750         if (ret)
 751                 ehca_err(&shca->ib_device,
 752                          "Cannot destroy internal PD. ret=%x", ret);
 753
 754 probe4:
 755         ret = ehca_destroy_eq(shca, &shca->neq);
 756         if (ret)
 757                 ehca_err(&shca->ib_device,
 758                          "Cannot destroy NEQ. ret=%x", ret);
 759
 760 probe3:
 761         ret = ehca_destroy_eq(shca, &shca->eq);
 762         if (ret)
 763                 ehca_err(&shca->ib_device,
 764                          "Cannot destroy EQ. ret=%x", ret);
 765
 766 probe1:
 767         ib_dealloc_device(&shca->ib_device);
 768
 769         return -EINVAL;
 770 }
 771
 772 static int __devexit ehca_remove(struct ibmebus_dev *dev)
 773 {
 774         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 775         int ret;
 776
 777         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 778
 779         if (ehca_open_aqp1 == 1) {
 780                 int i;
 781                 for (i = 0; i < shca->num_ports; i++) {
 782                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 783                         if (ret)
 784                                 ehca_err(&shca->ib_device,
 785                                          "Cannot destroy AQP1 for port %x "
 786                                          "ret=%x", ret, i);
 787                 }
 788         }
 789
 790         ib_unregister_device(&shca->ib_device);
 791
 792         ret = ehca_dereg_internal_maxmr(shca);
 793         if (ret)
 794                 ehca_err(&shca->ib_device,
 795                          "Cannot destroy internal MR. ret=%x", ret);
 796
 797         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 798         if (ret)
 799                 ehca_err(&shca->ib_device,
 800                          "Cannot destroy internal PD. ret=%x", ret);
 801
 802         ret = ehca_destroy_eq(shca, &shca->eq);
 803         if (ret)
 804                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
 805
 806         ret = ehca_destroy_eq(shca, &shca->neq);
 807         if (ret)
 808                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
 809
 810         ib_dealloc_device(&shca->ib_device);
 811
 812         spin_lock(&shca_list_lock);
 813         list_del(&shca->shca_list);
 814         spin_unlock(&shca_list_lock);
 815
 816         return ret;
 817 }
 818
 819 static struct of_device_id ehca_device_table[] =
 820 {
 821         {
 822                 .name       = "lhca",
 823                 .compatible = "IBM,lhca",
 824         },
 825         {},
 826 };
 827
 828 static struct ibmebus_driver ehca_driver = {
 829         .name     = "ehca",
 830         .id_table = ehca_device_table,
 831         .probe    = ehca_probe,
 832         .remove   = ehca_remove,
 833 };
 834
 835 void ehca_poll_eqs(unsigned long data)
 836 {
 837         struct ehca_shca *shca;
 838
 839         spin_lock(&shca_list_lock);
 840         list_for_each_entry(shca, &shca_list, shca_list) {
 841                 if (shca->eq.is_initialized) {
 842                         /* call deadman proc only if eq ptr does not change */
 843                         struct ehca_eq *eq = &shca->eq;
 844                         int max = 3;
 845                         volatile u64 q_ofs, q_ofs2;
 846                         u64 flags;
 847                         spin_lock_irqsave(&eq->spinlock, flags);
 848                         q_ofs = eq->ipz_queue.current_q_offset;
 849                         spin_unlock_irqrestore(&eq->spinlock, flags);
 850                         do {
 851                                 spin_lock_irqsave(&eq->spinlock, flags);
 852                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 853                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 854                                 max--;
 855                         } while (q_ofs == q_ofs2 && max > 0);
 856                         if (q_ofs == q_ofs2)
 857                                 ehca_process_eq(shca, 0);
 858                 }
 859         }
 860         mod_timer(&poll_eqs_timer, jiffies + HZ);
 861         spin_unlock(&shca_list_lock);
 862 }
 863
 864 int __init ehca_module_init(void)
 865 {
 866         int ret;
 867
 868         printk(KERN_INFO "eHCA Infiniband Device Driver "
 869                "(Rel.: SVNEHCA_0023)\n");
 870
 871         ret = ehca_create_comp_pool();
 872         if (ret) {
 873                 ehca_gen_err("Cannot create comp pool.");
 874                 return ret;
 875         }
 876
 877         ret = ehca_create_slab_caches();
 878         if (ret) {
 879                 ehca_gen_err("Cannot create SLAB caches");
 880                 ret = -ENOMEM;
 881                 goto module_init1;
 882         }
 883
 884         ret = ibmebus_register_driver(&ehca_driver);
 885         if (ret) {
 886                 ehca_gen_err("Cannot register eHCA device driver");
 887                 ret = -EINVAL;
 888                 goto module_init2;
 889         }
 890
 891         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 892         if (ret) /* only complain; we can live without attributes */
 893                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 894
 895         if (ehca_poll_all_eqs != 1) {
 896                 ehca_gen_err("WARNING!!!");
 897                 ehca_gen_err("It is possible to lose interrupts.");
 898         } else {
 899                 init_timer(&poll_eqs_timer);
 900                 poll_eqs_timer.function = ehca_poll_eqs;
 901                 poll_eqs_timer.expires = jiffies + HZ;
 902                 add_timer(&poll_eqs_timer);
 903         }
 904
 905         return 0;
 906
 907 module_init2:
 908         ehca_destroy_slab_caches();
 909
 910 module_init1:
 911         ehca_destroy_comp_pool();
 912         return ret;
 913 };
 914
 915 void __exit ehca_module_exit(void)
 916 {
 917         if (ehca_poll_all_eqs == 1)
 918                 del_timer_sync(&poll_eqs_timer);
 919
 920         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 921         ibmebus_unregister_driver(&ehca_driver);
 922
 923         ehca_destroy_slab_caches();
 924
 925         ehca_destroy_comp_pool();
 926
 927         idr_destroy(&ehca_cq_idr);
 928         idr_destroy(&ehca_qp_idr);
 929 };
 930
 931 module_init(ehca_module_init);
 932 module_exit(ehca_module_exit);