drivers/infiniband/hw/qib/qib_init.c

   1 /*
   2  * Copyright (c) 2012, 2013 Intel Corporation.  All rights reserved.
   3  * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
   4  * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34
  35 #include <linux/pci.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/vmalloc.h>
  38 #include <linux/delay.h>
  39 #include <linux/idr.h>
  40 #include <linux/module.h>
  41 #include <linux/printk.h>
  42 #ifdef CONFIG_INFINIBAND_QIB_DCA
  43 #include <linux/dca.h>
  44 #endif
  45 #include <rdma/rdma_vt.h>
  46
  47 #include "qib.h"
  48 #include "qib_common.h"
  49 #include "qib_mad.h"
  50 #ifdef CONFIG_DEBUG_FS
  51 #include "qib_debugfs.h"
  52 #include "qib_verbs.h"
  53 #endif
  54
  55 #undef pr_fmt
  56 #define pr_fmt(fmt) QIB_DRV_NAME ": " fmt
  57
  58 /*
  59  * min buffers we want to have per context, after driver
  60  */
  61 #define QIB_MIN_USER_CTXT_BUFCNT 7
  62
  63 #define QLOGIC_IB_R_SOFTWARE_MASK 0xFF
  64 #define QLOGIC_IB_R_SOFTWARE_SHIFT 24
  65 #define QLOGIC_IB_R_EMULATOR_MASK (1ULL<<62)
  66
  67 /*
  68  * Number of ctxts we are configured to use (to allow for more pio
  69  * buffers per ctxt, etc.)  Zero means use chip value.
  70  */
  71 ushort qib_cfgctxts;
  72 module_param_named(cfgctxts, qib_cfgctxts, ushort, S_IRUGO);
  73 MODULE_PARM_DESC(cfgctxts, "Set max number of contexts to use");
  74
  75 unsigned qib_numa_aware;
  76 module_param_named(numa_aware, qib_numa_aware, uint, S_IRUGO);
  77 MODULE_PARM_DESC(numa_aware,
  78         "0 -> PSM allocation close to HCA, 1 -> PSM allocation local to process");
  79
  80 /*
  81  * If set, do not write to any regs if avoidable, hack to allow
  82  * check for deranged default register values.
  83  */
  84 ushort qib_mini_init;
  85 module_param_named(mini_init, qib_mini_init, ushort, S_IRUGO);
  86 MODULE_PARM_DESC(mini_init, "If set, do minimal diag init");
  87
  88 unsigned qib_n_krcv_queues;
  89 module_param_named(krcvqs, qib_n_krcv_queues, uint, S_IRUGO);
  90 MODULE_PARM_DESC(krcvqs, "number of kernel receive queues per IB port");
  91
  92 unsigned qib_cc_table_size;
  93 module_param_named(cc_table_size, qib_cc_table_size, uint, S_IRUGO);
  94 MODULE_PARM_DESC(cc_table_size, "Congestion control table entries 0 (CCA disabled - default), min = 128, max = 1984");
  95
  96 static void verify_interrupt(unsigned long);
  97
  98 static struct idr qib_unit_table;
  99 u32 qib_cpulist_count;
 100 unsigned long *qib_cpulist;
 101
 102 /* set number of contexts we'll actually use */
 103 void qib_set_ctxtcnt(struct qib_devdata *dd)
 104 {
 105         if (!qib_cfgctxts) {
 106                 dd->cfgctxts = dd->first_user_ctxt + num_online_cpus();
 107                 if (dd->cfgctxts > dd->ctxtcnt)
 108                         dd->cfgctxts = dd->ctxtcnt;
 109         } else if (qib_cfgctxts < dd->num_pports)
 110                 dd->cfgctxts = dd->ctxtcnt;
 111         else if (qib_cfgctxts <= dd->ctxtcnt)
 112                 dd->cfgctxts = qib_cfgctxts;
 113         else
 114                 dd->cfgctxts = dd->ctxtcnt;
 115         dd->freectxts = (dd->first_user_ctxt > dd->cfgctxts) ? 0 :
 116                 dd->cfgctxts - dd->first_user_ctxt;
 117 }
 118
 119 /*
 120  * Common code for creating the receive context array.
 121  */
 122 int qib_create_ctxts(struct qib_devdata *dd)
 123 {
 124         unsigned i;
 125         int local_node_id = pcibus_to_node(dd->pcidev->bus);
 126
 127         if (local_node_id < 0)
 128                 local_node_id = numa_node_id();
 129         dd->assigned_node_id = local_node_id;
 130
 131         /*
 132          * Allocate full ctxtcnt array, rather than just cfgctxts, because
 133          * cleanup iterates across all possible ctxts.
 134          */
 135         dd->rcd = kcalloc(dd->ctxtcnt, sizeof(*dd->rcd), GFP_KERNEL);
 136         if (!dd->rcd)
 137                 return -ENOMEM;
 138
 139         /* create (one or more) kctxt */
 140         for (i = 0; i < dd->first_user_ctxt; ++i) {
 141                 struct qib_pportdata *ppd;
 142                 struct qib_ctxtdata *rcd;
 143
 144                 if (dd->skip_kctxt_mask & (1 << i))
 145                         continue;
 146
 147                 ppd = dd->pport + (i % dd->num_pports);
 148
 149                 rcd = qib_create_ctxtdata(ppd, i, dd->assigned_node_id);
 150                 if (!rcd) {
 151                         qib_dev_err(dd,
 152                                 "Unable to allocate ctxtdata for Kernel ctxt, failing\n");
 153                         kfree(dd->rcd);
 154                         dd->rcd = NULL;
 155                         return -ENOMEM;
 156                 }
 157                 rcd->pkeys[0] = QIB_DEFAULT_P_KEY;
 158                 rcd->seq_cnt = 1;
 159         }
 160         return 0;
 161 }
 162
 163 /*
 164  * Common code for user and kernel context setup.
 165  */
 166 struct qib_ctxtdata *qib_create_ctxtdata(struct qib_pportdata *ppd, u32 ctxt,
 167         int node_id)
 168 {
 169         struct qib_devdata *dd = ppd->dd;
 170         struct qib_ctxtdata *rcd;
 171
 172         rcd = kzalloc_node(sizeof(*rcd), GFP_KERNEL, node_id);
 173         if (rcd) {
 174                 INIT_LIST_HEAD(&rcd->qp_wait_list);
 175                 rcd->node_id = node_id;
 176                 rcd->ppd = ppd;
 177                 rcd->dd = dd;
 178                 rcd->cnt = 1;
 179                 rcd->ctxt = ctxt;
 180                 dd->rcd[ctxt] = rcd;
 181 #ifdef CONFIG_DEBUG_FS
 182                 if (ctxt < dd->first_user_ctxt) { /* N/A for PSM contexts */
 183                         rcd->opstats = kzalloc_node(sizeof(*rcd->opstats),
 184                                 GFP_KERNEL, node_id);
 185                         if (!rcd->opstats) {
 186                                 kfree(rcd);
 187                                 qib_dev_err(dd,
 188                                         "Unable to allocate per ctxt stats buffer\n");
 189                                 return NULL;
 190                         }
 191                 }
 192 #endif
 193                 dd->f_init_ctxt(rcd);
 194
 195                 /*
 196                  * To avoid wasting a lot of memory, we allocate 32KB chunks
 197                  * of physically contiguous memory, advance through it until
 198                  * used up and then allocate more.  Of course, we need
 199                  * memory to store those extra pointers, now.  32KB seems to
 200                  * be the most that is "safe" under memory pressure
 201                  * (creating large files and then copying them over
 202                  * NFS while doing lots of MPI jobs).  The OOM killer can
 203                  * get invoked, even though we say we can sleep and this can
 204                  * cause significant system problems....
 205                  */
 206                 rcd->rcvegrbuf_size = 0x8000;
 207                 rcd->rcvegrbufs_perchunk =
 208                         rcd->rcvegrbuf_size / dd->rcvegrbufsize;
 209                 rcd->rcvegrbuf_chunks = (rcd->rcvegrcnt +
 210                         rcd->rcvegrbufs_perchunk - 1) /
 211                         rcd->rcvegrbufs_perchunk;
 212                 BUG_ON(!is_power_of_2(rcd->rcvegrbufs_perchunk));
 213                 rcd->rcvegrbufs_perchunk_shift =
 214                         ilog2(rcd->rcvegrbufs_perchunk);
 215         }
 216         return rcd;
 217 }
 218
 219 /*
 220  * Common code for initializing the physical port structure.
 221  */
 222 int qib_init_pportdata(struct qib_pportdata *ppd, struct qib_devdata *dd,
 223                         u8 hw_pidx, u8 port)
 224 {
 225         int size;
 226
 227         ppd->dd = dd;
 228         ppd->hw_pidx = hw_pidx;
 229         ppd->port = port; /* IB port number, not index */
 230
 231         spin_lock_init(&ppd->sdma_lock);
 232         spin_lock_init(&ppd->lflags_lock);
 233         spin_lock_init(&ppd->cc_shadow_lock);
 234         init_waitqueue_head(&ppd->state_wait);
 235
 236         setup_timer(&ppd->symerr_clear_timer, qib_clear_symerror_on_linkup,
 237                     (unsigned long)ppd);
 238
 239         ppd->qib_wq = NULL;
 240         ppd->ibport_data.pmastats =
 241                 alloc_percpu(struct qib_pma_counters);
 242         if (!ppd->ibport_data.pmastats)
 243                 return -ENOMEM;
 244         ppd->ibport_data.rvp.rc_acks = alloc_percpu(u64);
 245         ppd->ibport_data.rvp.rc_qacks = alloc_percpu(u64);
 246         ppd->ibport_data.rvp.rc_delayed_comp = alloc_percpu(u64);
 247         if (!(ppd->ibport_data.rvp.rc_acks) ||
 248             !(ppd->ibport_data.rvp.rc_qacks) ||
 249             !(ppd->ibport_data.rvp.rc_delayed_comp))
 250                 return -ENOMEM;
 251
 252         if (qib_cc_table_size < IB_CCT_MIN_ENTRIES)
 253                 goto bail;
 254
 255         ppd->cc_supported_table_entries = min(max_t(int, qib_cc_table_size,
 256                 IB_CCT_MIN_ENTRIES), IB_CCT_ENTRIES*IB_CC_TABLE_CAP_DEFAULT);
 257
 258         ppd->cc_max_table_entries =
 259                 ppd->cc_supported_table_entries/IB_CCT_ENTRIES;
 260
 261         size = IB_CC_TABLE_CAP_DEFAULT * sizeof(struct ib_cc_table_entry)
 262                 * IB_CCT_ENTRIES;
 263         ppd->ccti_entries = kzalloc(size, GFP_KERNEL);
 264         if (!ppd->ccti_entries)
 265                 goto bail;
 266
 267         size = IB_CC_CCS_ENTRIES * sizeof(struct ib_cc_congestion_entry);
 268         ppd->congestion_entries = kzalloc(size, GFP_KERNEL);
 269         if (!ppd->congestion_entries)
 270                 goto bail_1;
 271
 272         size = sizeof(struct cc_table_shadow);
 273         ppd->ccti_entries_shadow = kzalloc(size, GFP_KERNEL);
 274         if (!ppd->ccti_entries_shadow)
 275                 goto bail_2;
 276
 277         size = sizeof(struct ib_cc_congestion_setting_attr);
 278         ppd->congestion_entries_shadow = kzalloc(size, GFP_KERNEL);
 279         if (!ppd->congestion_entries_shadow)
 280                 goto bail_3;
 281
 282         return 0;
 283
 284 bail_3:
 285         kfree(ppd->ccti_entries_shadow);
 286         ppd->ccti_entries_shadow = NULL;
 287 bail_2:
 288         kfree(ppd->congestion_entries);
 289         ppd->congestion_entries = NULL;
 290 bail_1:
 291         kfree(ppd->ccti_entries);
 292         ppd->ccti_entries = NULL;
 293 bail:
 294         /* User is intentionally disabling the congestion control agent */
 295         if (!qib_cc_table_size)
 296                 return 0;
 297
 298         if (qib_cc_table_size < IB_CCT_MIN_ENTRIES) {
 299                 qib_cc_table_size = 0;
 300                 qib_dev_err(dd,
 301                  "Congestion Control table size %d less than minimum %d for port %d\n",
 302                  qib_cc_table_size, IB_CCT_MIN_ENTRIES, port);
 303         }
 304
 305         qib_dev_err(dd, "Congestion Control Agent disabled for port %d\n",
 306                 port);
 307         return 0;
 308 }
 309
 310 static int init_pioavailregs(struct qib_devdata *dd)
 311 {
 312         int ret, pidx;
 313         u64 *status_page;
 314
 315         dd->pioavailregs_dma = dma_alloc_coherent(
 316                 &dd->pcidev->dev, PAGE_SIZE, &dd->pioavailregs_phys,
 317                 GFP_KERNEL);
 318         if (!dd->pioavailregs_dma) {
 319                 qib_dev_err(dd,
 320                         "failed to allocate PIOavail reg area in memory\n");
 321                 ret = -ENOMEM;
 322                 goto done;
 323         }
 324
 325         /*
 326          * We really want L2 cache aligned, but for current CPUs of
 327          * interest, they are the same.
 328          */
 329         status_page = (u64 *)
 330                 ((char *) dd->pioavailregs_dma +
 331                  ((2 * L1_CACHE_BYTES +
 332                    dd->pioavregs * sizeof(u64)) & ~L1_CACHE_BYTES));
 333         /* device status comes first, for backwards compatibility */
 334         dd->devstatusp = status_page;
 335         *status_page++ = 0;
 336         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 337                 dd->pport[pidx].statusp = status_page;
 338                 *status_page++ = 0;
 339         }
 340
 341         /*
 342          * Setup buffer to hold freeze and other messages, accessible to
 343          * apps, following statusp.  This is per-unit, not per port.
 344          */
 345         dd->freezemsg = (char *) status_page;
 346         *dd->freezemsg = 0;
 347         /* length of msg buffer is "whatever is left" */
 348         ret = (char *) status_page - (char *) dd->pioavailregs_dma;
 349         dd->freezelen = PAGE_SIZE - ret;
 350
 351         ret = 0;
 352
 353 done:
 354         return ret;
 355 }
 356
 357 /**
 358  * init_shadow_tids - allocate the shadow TID array
 359  * @dd: the qlogic_ib device
 360  *
 361  * allocate the shadow TID array, so we can qib_munlock previous
 362  * entries.  It may make more sense to move the pageshadow to the
 363  * ctxt data structure, so we only allocate memory for ctxts actually
 364  * in use, since we at 8k per ctxt, now.
 365  * We don't want failures here to prevent use of the driver/chip,
 366  * so no return value.
 367  */
 368 static void init_shadow_tids(struct qib_devdata *dd)
 369 {
 370         struct page **pages;
 371         dma_addr_t *addrs;
 372
 373         pages = vzalloc(dd->cfgctxts * dd->rcvtidcnt * sizeof(struct page *));
 374         if (!pages)
 375                 goto bail;
 376
 377         addrs = vzalloc(dd->cfgctxts * dd->rcvtidcnt * sizeof(dma_addr_t));
 378         if (!addrs)
 379                 goto bail_free;
 380
 381         dd->pageshadow = pages;
 382         dd->physshadow = addrs;
 383         return;
 384
 385 bail_free:
 386         vfree(pages);
 387 bail:
 388         dd->pageshadow = NULL;
 389 }
 390
 391 /*
 392  * Do initialization for device that is only needed on
 393  * first detect, not on resets.
 394  */
 395 static int loadtime_init(struct qib_devdata *dd)
 396 {
 397         int ret = 0;
 398
 399         if (((dd->revision >> QLOGIC_IB_R_SOFTWARE_SHIFT) &
 400              QLOGIC_IB_R_SOFTWARE_MASK) != QIB_CHIP_SWVERSION) {
 401                 qib_dev_err(dd,
 402                         "Driver only handles version %d, chip swversion is %d (%llx), failing\n",
 403                         QIB_CHIP_SWVERSION,
 404                         (int)(dd->revision >>
 405                                 QLOGIC_IB_R_SOFTWARE_SHIFT) &
 406                                 QLOGIC_IB_R_SOFTWARE_MASK,
 407                         (unsigned long long) dd->revision);
 408                 ret = -ENOSYS;
 409                 goto done;
 410         }
 411
 412         if (dd->revision & QLOGIC_IB_R_EMULATOR_MASK)
 413                 qib_devinfo(dd->pcidev, "%s", dd->boardversion);
 414
 415         spin_lock_init(&dd->pioavail_lock);
 416         spin_lock_init(&dd->sendctrl_lock);
 417         spin_lock_init(&dd->uctxt_lock);
 418         spin_lock_init(&dd->qib_diag_trans_lock);
 419         spin_lock_init(&dd->eep_st_lock);
 420         mutex_init(&dd->eep_lock);
 421
 422         if (qib_mini_init)
 423                 goto done;
 424
 425         ret = init_pioavailregs(dd);
 426         init_shadow_tids(dd);
 427
 428         qib_get_eeprom_info(dd);
 429
 430         /* setup time (don't start yet) to verify we got interrupt */
 431         setup_timer(&dd->intrchk_timer, verify_interrupt,
 432                     (unsigned long)dd);
 433 done:
 434         return ret;
 435 }
 436
 437 /**
 438  * init_after_reset - re-initialize after a reset
 439  * @dd: the qlogic_ib device
 440  *
 441  * sanity check at least some of the values after reset, and
 442  * ensure no receive or transmit (explicitly, in case reset
 443  * failed
 444  */
 445 static int init_after_reset(struct qib_devdata *dd)
 446 {
 447         int i;
 448
 449         /*
 450          * Ensure chip does no sends or receives, tail updates, or
 451          * pioavail updates while we re-initialize.  This is mostly
 452          * for the driver data structures, not chip registers.
 453          */
 454         for (i = 0; i < dd->num_pports; ++i) {
 455                 /*
 456                  * ctxt == -1 means "all contexts". Only really safe for
 457                  * _dis_abling things, as here.
 458                  */
 459                 dd->f_rcvctrl(dd->pport + i, QIB_RCVCTRL_CTXT_DIS |
 460                                   QIB_RCVCTRL_INTRAVAIL_DIS |
 461                                   QIB_RCVCTRL_TAILUPD_DIS, -1);
 462                 /* Redundant across ports for some, but no big deal.  */
 463                 dd->f_sendctrl(dd->pport + i, QIB_SENDCTRL_SEND_DIS |
 464                         QIB_SENDCTRL_AVAIL_DIS);
 465         }
 466
 467         return 0;
 468 }
 469
 470 static void enable_chip(struct qib_devdata *dd)
 471 {
 472         u64 rcvmask;
 473         int i;
 474
 475         /*
 476          * Enable PIO send, and update of PIOavail regs to memory.
 477          */
 478         for (i = 0; i < dd->num_pports; ++i)
 479                 dd->f_sendctrl(dd->pport + i, QIB_SENDCTRL_SEND_ENB |
 480                         QIB_SENDCTRL_AVAIL_ENB);
 481         /*
 482          * Enable kernel ctxts' receive and receive interrupt.
 483          * Other ctxts done as user opens and inits them.
 484          */
 485         rcvmask = QIB_RCVCTRL_CTXT_ENB | QIB_RCVCTRL_INTRAVAIL_ENB;
 486         rcvmask |= (dd->flags & QIB_NODMA_RTAIL) ?
 487                   QIB_RCVCTRL_TAILUPD_DIS : QIB_RCVCTRL_TAILUPD_ENB;
 488         for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
 489                 struct qib_ctxtdata *rcd = dd->rcd[i];
 490
 491                 if (rcd)
 492                         dd->f_rcvctrl(rcd->ppd, rcvmask, i);
 493         }
 494 }
 495
 496 static void verify_interrupt(unsigned long opaque)
 497 {
 498         struct qib_devdata *dd = (struct qib_devdata *) opaque;
 499         u64 int_counter;
 500
 501         if (!dd)
 502                 return; /* being torn down */
 503
 504         /*
 505          * If we don't have a lid or any interrupts, let the user know and
 506          * don't bother checking again.
 507          */
 508         int_counter = qib_int_counter(dd) - dd->z_int_counter;
 509         if (int_counter == 0) {
 510                 if (!dd->f_intr_fallback(dd))
 511                         dev_err(&dd->pcidev->dev,
 512                                 "No interrupts detected, not usable.\n");
 513                 else /* re-arm the timer to see if fallback works */
 514                         mod_timer(&dd->intrchk_timer, jiffies + HZ/2);
 515         }
 516 }
 517
 518 static void init_piobuf_state(struct qib_devdata *dd)
 519 {
 520         int i, pidx;
 521         u32 uctxts;
 522
 523         /*
 524          * Ensure all buffers are free, and fifos empty.  Buffers
 525          * are common, so only do once for port 0.
 526          *
 527          * After enable and qib_chg_pioavailkernel so we can safely
 528          * enable pioavail updates and PIOENABLE.  After this, packets
 529          * are ready and able to go out.
 530          */
 531         dd->f_sendctrl(dd->pport, QIB_SENDCTRL_DISARM_ALL);
 532         for (pidx = 0; pidx < dd->num_pports; ++pidx)
 533                 dd->f_sendctrl(dd->pport + pidx, QIB_SENDCTRL_FLUSH);
 534
 535         /*
 536          * If not all sendbufs are used, add the one to each of the lower
 537          * numbered contexts.  pbufsctxt and lastctxt_piobuf are
 538          * calculated in chip-specific code because it may cause some
 539          * chip-specific adjustments to be made.
 540          */
 541         uctxts = dd->cfgctxts - dd->first_user_ctxt;
 542         dd->ctxts_extrabuf = dd->pbufsctxt ?
 543                 dd->lastctxt_piobuf - (dd->pbufsctxt * uctxts) : 0;
 544
 545         /*
 546          * Set up the shadow copies of the piobufavail registers,
 547          * which we compare against the chip registers for now, and
 548          * the in memory DMA'ed copies of the registers.
 549          * By now pioavail updates to memory should have occurred, so
 550          * copy them into our working/shadow registers; this is in
 551          * case something went wrong with abort, but mostly to get the
 552          * initial values of the generation bit correct.
 553          */
 554         for (i = 0; i < dd->pioavregs; i++) {
 555                 __le64 tmp;
 556
 557                 tmp = dd->pioavailregs_dma[i];
 558                 /*
 559                  * Don't need to worry about pioavailkernel here
 560                  * because we will call qib_chg_pioavailkernel() later
 561                  * in initialization, to busy out buffers as needed.
 562                  */
 563                 dd->pioavailshadow[i] = le64_to_cpu(tmp);
 564         }
 565         while (i < ARRAY_SIZE(dd->pioavailshadow))
 566                 dd->pioavailshadow[i++] = 0; /* for debugging sanity */
 567
 568         /* after pioavailshadow is setup */
 569         qib_chg_pioavailkernel(dd, 0, dd->piobcnt2k + dd->piobcnt4k,
 570                                TXCHK_CHG_TYPE_KERN, NULL);
 571         dd->f_initvl15_bufs(dd);
 572 }
 573
 574 /**
 575  * qib_create_workqueues - create per port workqueues
 576  * @dd: the qlogic_ib device
 577  */
 578 static int qib_create_workqueues(struct qib_devdata *dd)
 579 {
 580         int pidx;
 581         struct qib_pportdata *ppd;
 582
 583         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 584                 ppd = dd->pport + pidx;
 585                 if (!ppd->qib_wq) {
 586                         char wq_name[8]; /* 3 + 2 + 1 + 1 + 1 */
 587
 588                         snprintf(wq_name, sizeof(wq_name), "qib%d_%d",
 589                                 dd->unit, pidx);
 590                         ppd->qib_wq = alloc_ordered_workqueue(wq_name,
 591                                                               WQ_MEM_RECLAIM);
 592                         if (!ppd->qib_wq)
 593                                 goto wq_error;
 594                 }
 595         }
 596         return 0;
 597 wq_error:
 598         pr_err("create_singlethread_workqueue failed for port %d\n",
 599                 pidx + 1);
 600         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 601                 ppd = dd->pport + pidx;
 602                 if (ppd->qib_wq) {
 603                         destroy_workqueue(ppd->qib_wq);
 604                         ppd->qib_wq = NULL;
 605                 }
 606         }
 607         return -ENOMEM;
 608 }
 609
 610 static void qib_free_pportdata(struct qib_pportdata *ppd)
 611 {
 612         free_percpu(ppd->ibport_data.pmastats);
 613         free_percpu(ppd->ibport_data.rvp.rc_acks);
 614         free_percpu(ppd->ibport_data.rvp.rc_qacks);
 615         free_percpu(ppd->ibport_data.rvp.rc_delayed_comp);
 616         ppd->ibport_data.pmastats = NULL;
 617 }
 618
 619 /**
 620  * qib_init - do the actual initialization sequence on the chip
 621  * @dd: the qlogic_ib device
 622  * @reinit: reinitializing, so don't allocate new memory
 623  *
 624  * Do the actual initialization sequence on the chip.  This is done
 625  * both from the init routine called from the PCI infrastructure, and
 626  * when we reset the chip, or detect that it was reset internally,
 627  * or it's administratively re-enabled.
 628  *
 629  * Memory allocation here and in called routines is only done in
 630  * the first case (reinit == 0).  We have to be careful, because even
 631  * without memory allocation, we need to re-write all the chip registers
 632  * TIDs, etc. after the reset or enable has completed.
 633  */
 634 int qib_init(struct qib_devdata *dd, int reinit)
 635 {
 636         int ret = 0, pidx, lastfail = 0;
 637         u32 portok = 0;
 638         unsigned i;
 639         struct qib_ctxtdata *rcd;
 640         struct qib_pportdata *ppd;
 641         unsigned long flags;
 642
 643         /* Set linkstate to unknown, so we can watch for a transition. */
 644         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 645                 ppd = dd->pport + pidx;
 646                 spin_lock_irqsave(&ppd->lflags_lock, flags);
 647                 ppd->lflags &= ~(QIBL_LINKACTIVE | QIBL_LINKARMED |
 648                                  QIBL_LINKDOWN | QIBL_LINKINIT |
 649                                  QIBL_LINKV);
 650                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
 651         }
 652
 653         if (reinit)
 654                 ret = init_after_reset(dd);
 655         else
 656                 ret = loadtime_init(dd);
 657         if (ret)
 658                 goto done;
 659
 660         /* Bypass most chip-init, to get to device creation */
 661         if (qib_mini_init)
 662                 return 0;
 663
 664         ret = dd->f_late_initreg(dd);
 665         if (ret)
 666                 goto done;
 667
 668         /* dd->rcd can be NULL if early init failed */
 669         for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
 670                 /*
 671                  * Set up the (kernel) rcvhdr queue and egr TIDs.  If doing
 672                  * re-init, the simplest way to handle this is to free
 673                  * existing, and re-allocate.
 674                  * Need to re-create rest of ctxt 0 ctxtdata as well.
 675                  */
 676                 rcd = dd->rcd[i];
 677                 if (!rcd)
 678                         continue;
 679
 680                 lastfail = qib_create_rcvhdrq(dd, rcd);
 681                 if (!lastfail)
 682                         lastfail = qib_setup_eagerbufs(rcd);
 683                 if (lastfail) {
 684                         qib_dev_err(dd,
 685                                 "failed to allocate kernel ctxt's rcvhdrq and/or egr bufs\n");
 686                         continue;
 687                 }
 688         }
 689
 690         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 691                 int mtu;
 692
 693                 if (lastfail)
 694                         ret = lastfail;
 695                 ppd = dd->pport + pidx;
 696                 mtu = ib_mtu_enum_to_int(qib_ibmtu);
 697                 if (mtu == -1) {
 698                         mtu = QIB_DEFAULT_MTU;
 699                         qib_ibmtu = 0; /* don't leave invalid value */
 700                 }
 701                 /* set max we can ever have for this driver load */
 702                 ppd->init_ibmaxlen = min(mtu > 2048 ?
 703                                          dd->piosize4k : dd->piosize2k,
 704                                          dd->rcvegrbufsize +
 705                                          (dd->rcvhdrentsize << 2));
 706                 /*
 707                  * Have to initialize ibmaxlen, but this will normally
 708                  * change immediately in qib_set_mtu().
 709                  */
 710                 ppd->ibmaxlen = ppd->init_ibmaxlen;
 711                 qib_set_mtu(ppd, mtu);
 712
 713                 spin_lock_irqsave(&ppd->lflags_lock, flags);
 714                 ppd->lflags |= QIBL_IB_LINK_DISABLED;
 715                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
 716
 717                 lastfail = dd->f_bringup_serdes(ppd);
 718                 if (lastfail) {
 719                         qib_devinfo(dd->pcidev,
 720                                  "Failed to bringup IB port %u\n", ppd->port);
 721                         lastfail = -ENETDOWN;
 722                         continue;
 723                 }
 724
 725                 portok++;
 726         }
 727
 728         if (!portok) {
 729                 /* none of the ports initialized */
 730                 if (!ret && lastfail)
 731                         ret = lastfail;
 732                 else if (!ret)
 733                         ret = -ENETDOWN;
 734                 /* but continue on, so we can debug cause */
 735         }
 736
 737         enable_chip(dd);
 738
 739         init_piobuf_state(dd);
 740
 741 done:
 742         if (!ret) {
 743                 /* chip is OK for user apps; mark it as initialized */
 744                 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 745                         ppd = dd->pport + pidx;
 746                         /*
 747                          * Set status even if port serdes is not initialized
 748                          * so that diags will work.
 749                          */
 750                         *ppd->statusp |= QIB_STATUS_CHIP_PRESENT |
 751                                 QIB_STATUS_INITTED;
 752                         if (!ppd->link_speed_enabled)
 753                                 continue;
 754                         if (dd->flags & QIB_HAS_SEND_DMA)
 755                                 ret = qib_setup_sdma(ppd);
 756                         setup_timer(&ppd->hol_timer, qib_hol_event,
 757                                     (unsigned long)ppd);
 758                         ppd->hol_state = QIB_HOL_UP;
 759                 }
 760
 761                 /* now we can enable all interrupts from the chip */
 762                 dd->f_set_intr_state(dd, 1);
 763
 764                 /*
 765                  * Setup to verify we get an interrupt, and fallback
 766                  * to an alternate if necessary and possible.
 767                  */
 768                 mod_timer(&dd->intrchk_timer, jiffies + HZ/2);
 769                 /* start stats retrieval timer */
 770                 mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
 771         }
 772
 773         /* if ret is non-zero, we probably should do some cleanup here... */
 774         return ret;
 775 }
 776
 777 /*
 778  * These next two routines are placeholders in case we don't have per-arch
 779  * code for controlling write combining.  If explicit control of write
 780  * combining is not available, performance will probably be awful.
 781  */
 782
 783 int __attribute__((weak)) qib_enable_wc(struct qib_devdata *dd)
 784 {
 785         return -EOPNOTSUPP;
 786 }
 787
 788 void __attribute__((weak)) qib_disable_wc(struct qib_devdata *dd)
 789 {
 790 }
 791
 792 static inline struct qib_devdata *__qib_lookup(int unit)
 793 {
 794         return idr_find(&qib_unit_table, unit);
 795 }
 796
 797 struct qib_devdata *qib_lookup(int unit)
 798 {
 799         struct qib_devdata *dd;
 800         unsigned long flags;
 801
 802         spin_lock_irqsave(&qib_devs_lock, flags);
 803         dd = __qib_lookup(unit);
 804         spin_unlock_irqrestore(&qib_devs_lock, flags);
 805
 806         return dd;
 807 }
 808
 809 /*
 810  * Stop the timers during unit shutdown, or after an error late
 811  * in initialization.
 812  */
 813 static void qib_stop_timers(struct qib_devdata *dd)
 814 {
 815         struct qib_pportdata *ppd;
 816         int pidx;
 817
 818         if (dd->stats_timer.data) {
 819                 del_timer_sync(&dd->stats_timer);
 820                 dd->stats_timer.data = 0;
 821         }
 822         if (dd->intrchk_timer.data) {
 823                 del_timer_sync(&dd->intrchk_timer);
 824                 dd->intrchk_timer.data = 0;
 825         }
 826         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 827                 ppd = dd->pport + pidx;
 828                 if (ppd->hol_timer.data)
 829                         del_timer_sync(&ppd->hol_timer);
 830                 if (ppd->led_override_timer.data) {
 831                         del_timer_sync(&ppd->led_override_timer);
 832                         atomic_set(&ppd->led_override_timer_active, 0);
 833                 }
 834                 if (ppd->symerr_clear_timer.data)
 835                         del_timer_sync(&ppd->symerr_clear_timer);
 836         }
 837 }
 838
 839 /**
 840  * qib_shutdown_device - shut down a device
 841  * @dd: the qlogic_ib device
 842  *
 843  * This is called to make the device quiet when we are about to
 844  * unload the driver, and also when the device is administratively
 845  * disabled.   It does not free any data structures.
 846  * Everything it does has to be setup again by qib_init(dd, 1)
 847  */
 848 static void qib_shutdown_device(struct qib_devdata *dd)
 849 {
 850         struct qib_pportdata *ppd;
 851         unsigned pidx;
 852
 853         if (dd->flags & QIB_SHUTDOWN)
 854                 return;
 855         dd->flags |= QIB_SHUTDOWN;
 856
 857         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 858                 ppd = dd->pport + pidx;
 859
 860                 spin_lock_irq(&ppd->lflags_lock);
 861                 ppd->lflags &= ~(QIBL_LINKDOWN | QIBL_LINKINIT |
 862                                  QIBL_LINKARMED | QIBL_LINKACTIVE |
 863                                  QIBL_LINKV);
 864                 spin_unlock_irq(&ppd->lflags_lock);
 865                 *ppd->statusp &= ~(QIB_STATUS_IB_CONF | QIB_STATUS_IB_READY);
 866         }
 867         dd->flags &= ~QIB_INITTED;
 868
 869         /* mask interrupts, but not errors */
 870         dd->f_set_intr_state(dd, 0);
 871
 872         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 873                 ppd = dd->pport + pidx;
 874                 dd->f_rcvctrl(ppd, QIB_RCVCTRL_TAILUPD_DIS |
 875                                    QIB_RCVCTRL_CTXT_DIS |
 876                                    QIB_RCVCTRL_INTRAVAIL_DIS |
 877                                    QIB_RCVCTRL_PKEY_ENB, -1);
 878                 /*
 879                  * Gracefully stop all sends allowing any in progress to
 880                  * trickle out first.
 881                  */
 882                 dd->f_sendctrl(ppd, QIB_SENDCTRL_CLEAR);
 883         }
 884
 885         /*
 886          * Enough for anything that's going to trickle out to have actually
 887          * done so.
 888          */
 889         udelay(20);
 890
 891         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 892                 ppd = dd->pport + pidx;
 893                 dd->f_setextled(ppd, 0); /* make sure LEDs are off */
 894
 895                 if (dd->flags & QIB_HAS_SEND_DMA)
 896                         qib_teardown_sdma(ppd);
 897
 898                 dd->f_sendctrl(ppd, QIB_SENDCTRL_AVAIL_DIS |
 899                                     QIB_SENDCTRL_SEND_DIS);
 900                 /*
 901                  * Clear SerdesEnable.
 902                  * We can't count on interrupts since we are stopping.
 903                  */
 904                 dd->f_quiet_serdes(ppd);
 905
 906                 if (ppd->qib_wq) {
 907                         destroy_workqueue(ppd->qib_wq);
 908                         ppd->qib_wq = NULL;
 909                 }
 910                 qib_free_pportdata(ppd);
 911         }
 912
 913 }
 914
 915 /**
 916  * qib_free_ctxtdata - free a context's allocated data
 917  * @dd: the qlogic_ib device
 918  * @rcd: the ctxtdata structure
 919  *
 920  * free up any allocated data for a context
 921  * This should not touch anything that would affect a simultaneous
 922  * re-allocation of context data, because it is called after qib_mutex
 923  * is released (and can be called from reinit as well).
 924  * It should never change any chip state, or global driver state.
 925  */
 926 void qib_free_ctxtdata(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
 927 {
 928         if (!rcd)
 929                 return;
 930
 931         if (rcd->rcvhdrq) {
 932                 dma_free_coherent(&dd->pcidev->dev, rcd->rcvhdrq_size,
 933                                   rcd->rcvhdrq, rcd->rcvhdrq_phys);
 934                 rcd->rcvhdrq = NULL;
 935                 if (rcd->rcvhdrtail_kvaddr) {
 936                         dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
 937                                           rcd->rcvhdrtail_kvaddr,
 938                                           rcd->rcvhdrqtailaddr_phys);
 939                         rcd->rcvhdrtail_kvaddr = NULL;
 940                 }
 941         }
 942         if (rcd->rcvegrbuf) {
 943                 unsigned e;
 944
 945                 for (e = 0; e < rcd->rcvegrbuf_chunks; e++) {
 946                         void *base = rcd->rcvegrbuf[e];
 947                         size_t size = rcd->rcvegrbuf_size;
 948
 949                         dma_free_coherent(&dd->pcidev->dev, size,
 950                                           base, rcd->rcvegrbuf_phys[e]);
 951                 }
 952                 kfree(rcd->rcvegrbuf);
 953                 rcd->rcvegrbuf = NULL;
 954                 kfree(rcd->rcvegrbuf_phys);
 955                 rcd->rcvegrbuf_phys = NULL;
 956                 rcd->rcvegrbuf_chunks = 0;
 957         }
 958
 959         kfree(rcd->tid_pg_list);
 960         vfree(rcd->user_event_mask);
 961         vfree(rcd->subctxt_uregbase);
 962         vfree(rcd->subctxt_rcvegrbuf);
 963         vfree(rcd->subctxt_rcvhdr_base);
 964 #ifdef CONFIG_DEBUG_FS
 965         kfree(rcd->opstats);
 966         rcd->opstats = NULL;
 967 #endif
 968         kfree(rcd);
 969 }
 970
 971 /*
 972  * Perform a PIO buffer bandwidth write test, to verify proper system
 973  * configuration.  Even when all the setup calls work, occasionally
 974  * BIOS or other issues can prevent write combining from working, or
 975  * can cause other bandwidth problems to the chip.
 976  *
 977  * This test simply writes the same buffer over and over again, and
 978  * measures close to the peak bandwidth to the chip (not testing
 979  * data bandwidth to the wire).   On chips that use an address-based
 980  * trigger to send packets to the wire, this is easy.  On chips that
 981  * use a count to trigger, we want to make sure that the packet doesn't
 982  * go out on the wire, or trigger flow control checks.
 983  */
 984 static void qib_verify_pioperf(struct qib_devdata *dd)
 985 {
 986         u32 pbnum, cnt, lcnt;
 987         u32 __iomem *piobuf;
 988         u32 *addr;
 989         u64 msecs, emsecs;
 990
 991         piobuf = dd->f_getsendbuf(dd->pport, 0ULL, &pbnum);
 992         if (!piobuf) {
 993                 qib_devinfo(dd->pcidev,
 994                          "No PIObufs for checking perf, skipping\n");
 995                 return;
 996         }
 997
 998         /*
 999          * Enough to give us a reasonable test, less than piobuf size, and
1000          * likely multiple of store buffer length.
1001          */
1002         cnt = 1024;
1003
1004         addr = vmalloc(cnt);
1005         if (!addr)
1006                 goto done;
1007
1008         preempt_disable();  /* we want reasonably accurate elapsed time */
1009         msecs = 1 + jiffies_to_msecs(jiffies);
1010         for (lcnt = 0; lcnt < 10000U; lcnt++) {
1011                 /* wait until we cross msec boundary */
1012                 if (jiffies_to_msecs(jiffies) >= msecs)
1013                         break;
1014                 udelay(1);
1015         }
1016
1017         dd->f_set_armlaunch(dd, 0);
1018
1019         /*
1020          * length 0, no dwords actually sent
1021          */
1022         writeq(0, piobuf);
1023         qib_flush_wc();
1024
1025         /*
1026          * This is only roughly accurate, since even with preempt we
1027          * still take interrupts that could take a while.   Running for
1028          * >= 5 msec seems to get us "close enough" to accurate values.
1029          */
1030         msecs = jiffies_to_msecs(jiffies);
1031         for (emsecs = lcnt = 0; emsecs <= 5UL; lcnt++) {
1032                 qib_pio_copy(piobuf + 64, addr, cnt >> 2);
1033                 emsecs = jiffies_to_msecs(jiffies) - msecs;
1034         }
1035
1036         /* 1 GiB/sec, slightly over IB SDR line rate */
1037         if (lcnt < (emsecs * 1024U))
1038                 qib_dev_err(dd,
1039                             "Performance problem: bandwidth to PIO buffers is only %u MiB/sec\n",
1040                             lcnt / (u32) emsecs);
1041
1042         preempt_enable();
1043
1044         vfree(addr);
1045
1046 done:
1047         /* disarm piobuf, so it's available again */
1048         dd->f_sendctrl(dd->pport, QIB_SENDCTRL_DISARM_BUF(pbnum));
1049         qib_sendbuf_done(dd, pbnum);
1050         dd->f_set_armlaunch(dd, 1);
1051 }
1052
1053 void qib_free_devdata(struct qib_devdata *dd)
1054 {
1055         unsigned long flags;
1056
1057         spin_lock_irqsave(&qib_devs_lock, flags);
1058         idr_remove(&qib_unit_table, dd->unit);
1059         list_del(&dd->list);
1060         spin_unlock_irqrestore(&qib_devs_lock, flags);
1061
1062 #ifdef CONFIG_DEBUG_FS
1063         qib_dbg_ibdev_exit(&dd->verbs_dev);
1064 #endif
1065         free_percpu(dd->int_counter);
1066         rvt_dealloc_device(&dd->verbs_dev.rdi);
1067 }
1068
1069 u64 qib_int_counter(struct qib_devdata *dd)
1070 {
1071         int cpu;
1072         u64 int_counter = 0;
1073
1074         for_each_possible_cpu(cpu)
1075                 int_counter += *per_cpu_ptr(dd->int_counter, cpu);
1076         return int_counter;
1077 }
1078
1079 u64 qib_sps_ints(void)
1080 {
1081         unsigned long flags;
1082         struct qib_devdata *dd;
1083         u64 sps_ints = 0;
1084
1085         spin_lock_irqsave(&qib_devs_lock, flags);
1086         list_for_each_entry(dd, &qib_dev_list, list) {
1087                 sps_ints += qib_int_counter(dd);
1088         }
1089         spin_unlock_irqrestore(&qib_devs_lock, flags);
1090         return sps_ints;
1091 }
1092
1093 /*
1094  * Allocate our primary per-unit data structure.  Must be done via verbs
1095  * allocator, because the verbs cleanup process both does cleanup and
1096  * free of the data structure.
1097  * "extra" is for chip-specific data.
1098  *
1099  * Use the idr mechanism to get a unit number for this unit.
1100  */
1101 struct qib_devdata *qib_alloc_devdata(struct pci_dev *pdev, size_t extra)
1102 {
1103         unsigned long flags;
1104         struct qib_devdata *dd;
1105         int ret, nports;
1106
1107         /* extra is * number of ports */
1108         nports = extra / sizeof(struct qib_pportdata);
1109         dd = (struct qib_devdata *)rvt_alloc_device(sizeof(*dd) + extra,
1110                                                     nports);
1111         if (!dd)
1112                 return ERR_PTR(-ENOMEM);
1113
1114         INIT_LIST_HEAD(&dd->list);
1115
1116         idr_preload(GFP_KERNEL);
1117         spin_lock_irqsave(&qib_devs_lock, flags);
1118
1119         ret = idr_alloc(&qib_unit_table, dd, 0, 0, GFP_NOWAIT);
1120         if (ret >= 0) {
1121                 dd->unit = ret;
1122                 list_add(&dd->list, &qib_dev_list);
1123         }
1124
1125         spin_unlock_irqrestore(&qib_devs_lock, flags);
1126         idr_preload_end();
1127
1128         if (ret < 0) {
1129                 qib_early_err(&pdev->dev,
1130                               "Could not allocate unit ID: error %d\n", -ret);
1131                 goto bail;
1132         }
1133         dd->int_counter = alloc_percpu(u64);
1134         if (!dd->int_counter) {
1135                 ret = -ENOMEM;
1136                 qib_early_err(&pdev->dev,
1137                               "Could not allocate per-cpu int_counter\n");
1138                 goto bail;
1139         }
1140
1141         if (!qib_cpulist_count) {
1142                 u32 count = num_online_cpus();
1143
1144                 qib_cpulist = kzalloc(BITS_TO_LONGS(count) *
1145                                       sizeof(long), GFP_KERNEL);
1146                 if (qib_cpulist)
1147                         qib_cpulist_count = count;
1148         }
1149 #ifdef CONFIG_DEBUG_FS
1150         qib_dbg_ibdev_init(&dd->verbs_dev);
1151 #endif
1152         return dd;
1153 bail:
1154         if (!list_empty(&dd->list))
1155                 list_del_init(&dd->list);
1156         rvt_dealloc_device(&dd->verbs_dev.rdi);
1157         return ERR_PTR(ret);
1158 }
1159
1160 /*
1161  * Called from freeze mode handlers, and from PCI error
1162  * reporting code.  Should be paranoid about state of
1163  * system and data structures.
1164  */
1165 void qib_disable_after_error(struct qib_devdata *dd)
1166 {
1167         if (dd->flags & QIB_INITTED) {
1168                 u32 pidx;
1169
1170                 dd->flags &= ~QIB_INITTED;
1171                 if (dd->pport)
1172                         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1173                                 struct qib_pportdata *ppd;
1174
1175                                 ppd = dd->pport + pidx;
1176                                 if (dd->flags & QIB_PRESENT) {
1177                                         qib_set_linkstate(ppd,
1178                                                 QIB_IB_LINKDOWN_DISABLE);
1179                                         dd->f_setextled(ppd, 0);
1180                                 }
1181                                 *ppd->statusp &= ~QIB_STATUS_IB_READY;
1182                         }
1183         }
1184
1185         /*
1186          * Mark as having had an error for driver, and also
1187          * for /sys and status word mapped to user programs.
1188          * This marks unit as not usable, until reset.
1189          */
1190         if (dd->devstatusp)
1191                 *dd->devstatusp |= QIB_STATUS_HWERROR;
1192 }
1193
1194 static void qib_remove_one(struct pci_dev *);
1195 static int qib_init_one(struct pci_dev *, const struct pci_device_id *);
1196 static void qib_shutdown_one(struct pci_dev *);
1197
1198 #define DRIVER_LOAD_MSG "Intel " QIB_DRV_NAME " loaded: "
1199 #define PFX QIB_DRV_NAME ": "
1200
1201 static const struct pci_device_id qib_pci_tbl[] = {
1202         { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_QLOGIC_IB_6120) },
1203         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_IB_7220) },
1204         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_IB_7322) },
1205         { 0, }
1206 };
1207
1208 MODULE_DEVICE_TABLE(pci, qib_pci_tbl);
1209
1210 static struct pci_driver qib_driver = {
1211         .name = QIB_DRV_NAME,
1212         .probe = qib_init_one,
1213         .remove = qib_remove_one,
1214         .shutdown = qib_shutdown_one,
1215         .id_table = qib_pci_tbl,
1216         .err_handler = &qib_pci_err_handler,
1217 };
1218
1219 #ifdef CONFIG_INFINIBAND_QIB_DCA
1220
1221 static int qib_notify_dca(struct notifier_block *, unsigned long, void *);
1222 static struct notifier_block dca_notifier = {
1223         .notifier_call  = qib_notify_dca,
1224         .next           = NULL,
1225         .priority       = 0
1226 };
1227
1228 static int qib_notify_dca_device(struct device *device, void *data)
1229 {
1230         struct qib_devdata *dd = dev_get_drvdata(device);
1231         unsigned long event = *(unsigned long *)data;
1232
1233         return dd->f_notify_dca(dd, event);
1234 }
1235
1236 static int qib_notify_dca(struct notifier_block *nb, unsigned long event,
1237                                           void *p)
1238 {
1239         int rval;
1240
1241         rval = driver_for_each_device(&qib_driver.driver, NULL,
1242                                       &event, qib_notify_dca_device);
1243         return rval ? NOTIFY_BAD : NOTIFY_DONE;
1244 }
1245
1246 #endif
1247
1248 /*
1249  * Do all the generic driver unit- and chip-independent memory
1250  * allocation and initialization.
1251  */
1252 static int __init qib_ib_init(void)
1253 {
1254         int ret;
1255
1256         ret = qib_dev_init();
1257         if (ret)
1258                 goto bail;
1259
1260         /*
1261          * These must be called before the driver is registered with
1262          * the PCI subsystem.
1263          */
1264         idr_init(&qib_unit_table);
1265
1266 #ifdef CONFIG_INFINIBAND_QIB_DCA
1267         dca_register_notify(&dca_notifier);
1268 #endif
1269 #ifdef CONFIG_DEBUG_FS
1270         qib_dbg_init();
1271 #endif
1272         ret = pci_register_driver(&qib_driver);
1273         if (ret < 0) {
1274                 pr_err("Unable to register driver: error %d\n", -ret);
1275                 goto bail_dev;
1276         }
1277
1278         /* not fatal if it doesn't work */
1279         if (qib_init_qibfs())
1280                 pr_err("Unable to register ipathfs\n");
1281         goto bail; /* all OK */
1282
1283 bail_dev:
1284 #ifdef CONFIG_INFINIBAND_QIB_DCA
1285         dca_unregister_notify(&dca_notifier);
1286 #endif
1287 #ifdef CONFIG_DEBUG_FS
1288         qib_dbg_exit();
1289 #endif
1290         idr_destroy(&qib_unit_table);
1291         qib_dev_cleanup();
1292 bail:
1293         return ret;
1294 }
1295
1296 module_init(qib_ib_init);
1297
1298 /*
1299  * Do the non-unit driver cleanup, memory free, etc. at unload.
1300  */
1301 static void __exit qib_ib_cleanup(void)
1302 {
1303         int ret;
1304
1305         ret = qib_exit_qibfs();
1306         if (ret)
1307                 pr_err(
1308                         "Unable to cleanup counter filesystem: error %d\n",
1309                         -ret);
1310
1311 #ifdef CONFIG_INFINIBAND_QIB_DCA
1312         dca_unregister_notify(&dca_notifier);
1313 #endif
1314         pci_unregister_driver(&qib_driver);
1315 #ifdef CONFIG_DEBUG_FS
1316         qib_dbg_exit();
1317 #endif
1318
1319         qib_cpulist_count = 0;
1320         kfree(qib_cpulist);
1321
1322         idr_destroy(&qib_unit_table);
1323         qib_dev_cleanup();
1324 }
1325
1326 module_exit(qib_ib_cleanup);
1327
1328 /* this can only be called after a successful initialization */
1329 static void cleanup_device_data(struct qib_devdata *dd)
1330 {
1331         int ctxt;
1332         int pidx;
1333         struct qib_ctxtdata **tmp;
1334         unsigned long flags;
1335
1336         /* users can't do anything more with chip */
1337         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1338                 if (dd->pport[pidx].statusp)
1339                         *dd->pport[pidx].statusp &= ~QIB_STATUS_CHIP_PRESENT;
1340
1341                 spin_lock(&dd->pport[pidx].cc_shadow_lock);
1342
1343                 kfree(dd->pport[pidx].congestion_entries);
1344                 dd->pport[pidx].congestion_entries = NULL;
1345                 kfree(dd->pport[pidx].ccti_entries);
1346                 dd->pport[pidx].ccti_entries = NULL;
1347                 kfree(dd->pport[pidx].ccti_entries_shadow);
1348                 dd->pport[pidx].ccti_entries_shadow = NULL;
1349                 kfree(dd->pport[pidx].congestion_entries_shadow);
1350                 dd->pport[pidx].congestion_entries_shadow = NULL;
1351
1352                 spin_unlock(&dd->pport[pidx].cc_shadow_lock);
1353         }
1354
1355         qib_disable_wc(dd);
1356
1357         if (dd->pioavailregs_dma) {
1358                 dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
1359                                   (void *) dd->pioavailregs_dma,
1360                                   dd->pioavailregs_phys);
1361                 dd->pioavailregs_dma = NULL;
1362         }
1363
1364         if (dd->pageshadow) {
1365                 struct page **tmpp = dd->pageshadow;
1366                 dma_addr_t *tmpd = dd->physshadow;
1367                 int i;
1368
1369                 for (ctxt = 0; ctxt < dd->cfgctxts; ctxt++) {
1370                         int ctxt_tidbase = ctxt * dd->rcvtidcnt;
1371                         int maxtid = ctxt_tidbase + dd->rcvtidcnt;
1372
1373                         for (i = ctxt_tidbase; i < maxtid; i++) {
1374                                 if (!tmpp[i])
1375                                         continue;
1376                                 pci_unmap_page(dd->pcidev, tmpd[i],
1377                                                PAGE_SIZE, PCI_DMA_FROMDEVICE);
1378                                 qib_release_user_pages(&tmpp[i], 1);
1379                                 tmpp[i] = NULL;
1380                         }
1381                 }
1382
1383                 dd->pageshadow = NULL;
1384                 vfree(tmpp);
1385                 dd->physshadow = NULL;
1386                 vfree(tmpd);
1387         }
1388
1389         /*
1390          * Free any resources still in use (usually just kernel contexts)
1391          * at unload; we do for ctxtcnt, because that's what we allocate.
1392          * We acquire lock to be really paranoid that rcd isn't being
1393          * accessed from some interrupt-related code (that should not happen,
1394          * but best to be sure).
1395          */
1396         spin_lock_irqsave(&dd->uctxt_lock, flags);
1397         tmp = dd->rcd;
1398         dd->rcd = NULL;
1399         spin_unlock_irqrestore(&dd->uctxt_lock, flags);
1400         for (ctxt = 0; tmp && ctxt < dd->ctxtcnt; ctxt++) {
1401                 struct qib_ctxtdata *rcd = tmp[ctxt];
1402
1403                 tmp[ctxt] = NULL; /* debugging paranoia */
1404                 qib_free_ctxtdata(dd, rcd);
1405         }
1406         kfree(tmp);
1407 }
1408
1409 /*
1410  * Clean up on unit shutdown, or error during unit load after
1411  * successful initialization.
1412  */
1413 static void qib_postinit_cleanup(struct qib_devdata *dd)
1414 {
1415         /*
1416          * Clean up chip-specific stuff.
1417          * We check for NULL here, because it's outside
1418          * the kregbase check, and we need to call it
1419          * after the free_irq.  Thus it's possible that
1420          * the function pointers were never initialized.
1421          */
1422         if (dd->f_cleanup)
1423                 dd->f_cleanup(dd);
1424
1425         qib_pcie_ddcleanup(dd);
1426
1427         cleanup_device_data(dd);
1428
1429         qib_free_devdata(dd);
1430 }
1431
1432 static int qib_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1433 {
1434         int ret, j, pidx, initfail;
1435         struct qib_devdata *dd = NULL;
1436
1437         ret = qib_pcie_init(pdev, ent);
1438         if (ret)
1439                 goto bail;
1440
1441         /*
1442          * Do device-specific initialiation, function table setup, dd
1443          * allocation, etc.
1444          */
1445         switch (ent->device) {
1446         case PCI_DEVICE_ID_QLOGIC_IB_6120:
1447 #ifdef CONFIG_PCI_MSI
1448                 dd = qib_init_iba6120_funcs(pdev, ent);
1449 #else
1450                 qib_early_err(&pdev->dev,
1451                         "Intel PCIE device 0x%x cannot work if CONFIG_PCI_MSI is not enabled\n",
1452                         ent->device);
1453                 dd = ERR_PTR(-ENODEV);
1454 #endif
1455                 break;
1456
1457         case PCI_DEVICE_ID_QLOGIC_IB_7220:
1458                 dd = qib_init_iba7220_funcs(pdev, ent);
1459                 break;
1460
1461         case PCI_DEVICE_ID_QLOGIC_IB_7322:
1462                 dd = qib_init_iba7322_funcs(pdev, ent);
1463                 break;
1464
1465         default:
1466                 qib_early_err(&pdev->dev,
1467                         "Failing on unknown Intel deviceid 0x%x\n",
1468                         ent->device);
1469                 ret = -ENODEV;
1470         }
1471
1472         if (IS_ERR(dd))
1473                 ret = PTR_ERR(dd);
1474         if (ret)
1475                 goto bail; /* error already printed */
1476
1477         ret = qib_create_workqueues(dd);
1478         if (ret)
1479                 goto bail;
1480
1481         /* do the generic initialization */
1482         initfail = qib_init(dd, 0);
1483
1484         ret = qib_register_ib_device(dd);
1485
1486         /*
1487          * Now ready for use.  this should be cleared whenever we
1488          * detect a reset, or initiate one.  If earlier failure,
1489          * we still create devices, so diags, etc. can be used
1490          * to determine cause of problem.
1491          */
1492         if (!qib_mini_init && !initfail && !ret)
1493                 dd->flags |= QIB_INITTED;
1494
1495         j = qib_device_create(dd);
1496         if (j)
1497                 qib_dev_err(dd, "Failed to create /dev devices: %d\n", -j);
1498         j = qibfs_add(dd);
1499         if (j)
1500                 qib_dev_err(dd, "Failed filesystem setup for counters: %d\n",
1501                             -j);
1502
1503         if (qib_mini_init || initfail || ret) {
1504                 qib_stop_timers(dd);
1505                 flush_workqueue(ib_wq);
1506                 for (pidx = 0; pidx < dd->num_pports; ++pidx)
1507                         dd->f_quiet_serdes(dd->pport + pidx);
1508                 if (qib_mini_init)
1509                         goto bail;
1510                 if (!j) {
1511                         (void) qibfs_remove(dd);
1512                         qib_device_remove(dd);
1513                 }
1514                 if (!ret)
1515                         qib_unregister_ib_device(dd);
1516                 qib_postinit_cleanup(dd);
1517                 if (initfail)
1518                         ret = initfail;
1519                 goto bail;
1520         }
1521
1522         ret = qib_enable_wc(dd);
1523         if (ret) {
1524                 qib_dev_err(dd,
1525                         "Write combining not enabled (err %d): performance may be poor\n",
1526                         -ret);
1527                 ret = 0;
1528         }
1529
1530         qib_verify_pioperf(dd);
1531 bail:
1532         return ret;
1533 }
1534
1535 static void qib_remove_one(struct pci_dev *pdev)
1536 {
1537         struct qib_devdata *dd = pci_get_drvdata(pdev);
1538         int ret;
1539
1540         /* unregister from IB core */
1541         qib_unregister_ib_device(dd);
1542
1543         /*
1544          * Disable the IB link, disable interrupts on the device,
1545          * clear dma engines, etc.
1546          */
1547         if (!qib_mini_init)
1548                 qib_shutdown_device(dd);
1549
1550         qib_stop_timers(dd);
1551
1552         /* wait until all of our (qsfp) queue_work() calls complete */
1553         flush_workqueue(ib_wq);
1554
1555         ret = qibfs_remove(dd);
1556         if (ret)
1557                 qib_dev_err(dd, "Failed counters filesystem cleanup: %d\n",
1558                             -ret);
1559
1560         qib_device_remove(dd);
1561
1562         qib_postinit_cleanup(dd);
1563 }
1564
1565 static void qib_shutdown_one(struct pci_dev *pdev)
1566 {
1567         struct qib_devdata *dd = pci_get_drvdata(pdev);
1568
1569         qib_shutdown_device(dd);
1570 }
1571
1572 /**
1573  * qib_create_rcvhdrq - create a receive header queue
1574  * @dd: the qlogic_ib device
1575  * @rcd: the context data
1576  *
1577  * This must be contiguous memory (from an i/o perspective), and must be
1578  * DMA'able (which means for some systems, it will go through an IOMMU,
1579  * or be forced into a low address range).
1580  */
1581 int qib_create_rcvhdrq(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
1582 {
1583         unsigned amt;
1584         int old_node_id;
1585
1586         if (!rcd->rcvhdrq) {
1587                 dma_addr_t phys_hdrqtail;
1588                 gfp_t gfp_flags;
1589
1590                 amt = ALIGN(dd->rcvhdrcnt * dd->rcvhdrentsize *
1591                             sizeof(u32), PAGE_SIZE);
1592                 gfp_flags = (rcd->ctxt >= dd->first_user_ctxt) ?
1593                         GFP_USER : GFP_KERNEL;
1594
1595                 old_node_id = dev_to_node(&dd->pcidev->dev);
1596                 set_dev_node(&dd->pcidev->dev, rcd->node_id);
1597                 rcd->rcvhdrq = dma_alloc_coherent(
1598                         &dd->pcidev->dev, amt, &rcd->rcvhdrq_phys,
1599                         gfp_flags | __GFP_COMP);
1600                 set_dev_node(&dd->pcidev->dev, old_node_id);
1601
1602                 if (!rcd->rcvhdrq) {
1603                         qib_dev_err(dd,
1604                                 "attempt to allocate %d bytes for ctxt %u rcvhdrq failed\n",
1605                                 amt, rcd->ctxt);
1606                         goto bail;
1607                 }
1608
1609                 if (rcd->ctxt >= dd->first_user_ctxt) {
1610                         rcd->user_event_mask = vmalloc_user(PAGE_SIZE);
1611                         if (!rcd->user_event_mask)
1612                                 goto bail_free_hdrq;
1613                 }
1614
1615                 if (!(dd->flags & QIB_NODMA_RTAIL)) {
1616                         set_dev_node(&dd->pcidev->dev, rcd->node_id);
1617                         rcd->rcvhdrtail_kvaddr = dma_alloc_coherent(
1618                                 &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail,
1619                                 gfp_flags);
1620                         set_dev_node(&dd->pcidev->dev, old_node_id);
1621                         if (!rcd->rcvhdrtail_kvaddr)
1622                                 goto bail_free;
1623                         rcd->rcvhdrqtailaddr_phys = phys_hdrqtail;
1624                 }
1625
1626                 rcd->rcvhdrq_size = amt;
1627         }
1628
1629         /* clear for security and sanity on each use */
1630         memset(rcd->rcvhdrq, 0, rcd->rcvhdrq_size);
1631         if (rcd->rcvhdrtail_kvaddr)
1632                 memset(rcd->rcvhdrtail_kvaddr, 0, PAGE_SIZE);
1633         return 0;
1634
1635 bail_free:
1636         qib_dev_err(dd,
1637                 "attempt to allocate 1 page for ctxt %u rcvhdrqtailaddr failed\n",
1638                 rcd->ctxt);
1639         vfree(rcd->user_event_mask);
1640         rcd->user_event_mask = NULL;
1641 bail_free_hdrq:
1642         dma_free_coherent(&dd->pcidev->dev, amt, rcd->rcvhdrq,
1643                           rcd->rcvhdrq_phys);
1644         rcd->rcvhdrq = NULL;
1645 bail:
1646         return -ENOMEM;
1647 }
1648
1649 /**
1650  * allocate eager buffers, both kernel and user contexts.
1651  * @rcd: the context we are setting up.
1652  *
1653  * Allocate the eager TID buffers and program them into hip.
1654  * They are no longer completely contiguous, we do multiple allocation
1655  * calls.  Otherwise we get the OOM code involved, by asking for too
1656  * much per call, with disastrous results on some kernels.
1657  */
1658 int qib_setup_eagerbufs(struct qib_ctxtdata *rcd)
1659 {
1660         struct qib_devdata *dd = rcd->dd;
1661         unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
1662         size_t size;
1663         gfp_t gfp_flags;
1664         int old_node_id;
1665
1666         /*
1667          * GFP_USER, but without GFP_FS, so buffer cache can be
1668          * coalesced (we hope); otherwise, even at order 4,
1669          * heavy filesystem activity makes these fail, and we can
1670          * use compound pages.
1671          */
1672         gfp_flags = __GFP_RECLAIM | __GFP_IO | __GFP_COMP;
1673
1674         egrcnt = rcd->rcvegrcnt;
1675         egroff = rcd->rcvegr_tid_base;
1676         egrsize = dd->rcvegrbufsize;
1677
1678         chunk = rcd->rcvegrbuf_chunks;
1679         egrperchunk = rcd->rcvegrbufs_perchunk;
1680         size = rcd->rcvegrbuf_size;
1681         if (!rcd->rcvegrbuf) {
1682                 rcd->rcvegrbuf =
1683                         kzalloc_node(chunk * sizeof(rcd->rcvegrbuf[0]),
1684                                 GFP_KERNEL, rcd->node_id);
1685                 if (!rcd->rcvegrbuf)
1686                         goto bail;
1687         }
1688         if (!rcd->rcvegrbuf_phys) {
1689                 rcd->rcvegrbuf_phys =
1690                         kmalloc_node(chunk * sizeof(rcd->rcvegrbuf_phys[0]),
1691                                 GFP_KERNEL, rcd->node_id);
1692                 if (!rcd->rcvegrbuf_phys)
1693                         goto bail_rcvegrbuf;
1694         }
1695         for (e = 0; e < rcd->rcvegrbuf_chunks; e++) {
1696                 if (rcd->rcvegrbuf[e])
1697                         continue;
1698
1699                 old_node_id = dev_to_node(&dd->pcidev->dev);
1700                 set_dev_node(&dd->pcidev->dev, rcd->node_id);
1701                 rcd->rcvegrbuf[e] =
1702                         dma_alloc_coherent(&dd->pcidev->dev, size,
1703                                            &rcd->rcvegrbuf_phys[e],
1704                                            gfp_flags);
1705                 set_dev_node(&dd->pcidev->dev, old_node_id);
1706                 if (!rcd->rcvegrbuf[e])
1707                         goto bail_rcvegrbuf_phys;
1708         }
1709
1710         rcd->rcvegr_phys = rcd->rcvegrbuf_phys[0];
1711
1712         for (e = chunk = 0; chunk < rcd->rcvegrbuf_chunks; chunk++) {
1713                 dma_addr_t pa = rcd->rcvegrbuf_phys[chunk];
1714                 unsigned i;
1715
1716                 /* clear for security and sanity on each use */
1717                 memset(rcd->rcvegrbuf[chunk], 0, size);
1718
1719                 for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
1720                         dd->f_put_tid(dd, e + egroff +
1721                                           (u64 __iomem *)
1722                                           ((char __iomem *)
1723                                            dd->kregbase +
1724                                            dd->rcvegrbase),
1725                                           RCVHQ_RCV_TYPE_EAGER, pa);
1726                         pa += egrsize;
1727                 }
1728                 cond_resched(); /* don't hog the cpu */
1729         }
1730
1731         return 0;
1732
1733 bail_rcvegrbuf_phys:
1734         for (e = 0; e < rcd->rcvegrbuf_chunks && rcd->rcvegrbuf[e]; e++)
1735                 dma_free_coherent(&dd->pcidev->dev, size,
1736                                   rcd->rcvegrbuf[e], rcd->rcvegrbuf_phys[e]);
1737         kfree(rcd->rcvegrbuf_phys);
1738         rcd->rcvegrbuf_phys = NULL;
1739 bail_rcvegrbuf:
1740         kfree(rcd->rcvegrbuf);
1741         rcd->rcvegrbuf = NULL;
1742 bail:
1743         return -ENOMEM;
1744 }
1745
1746 /*
1747  * Note: Changes to this routine should be mirrored
1748  * for the diagnostics routine qib_remap_ioaddr32().
1749  * There is also related code for VL15 buffers in qib_init_7322_variables().
1750  * The teardown code that unmaps is in qib_pcie_ddcleanup()
1751  */
1752 int init_chip_wc_pat(struct qib_devdata *dd, u32 vl15buflen)
1753 {
1754         u64 __iomem *qib_kregbase = NULL;
1755         void __iomem *qib_piobase = NULL;
1756         u64 __iomem *qib_userbase = NULL;
1757         u64 qib_kreglen;
1758         u64 qib_pio2koffset = dd->piobufbase & 0xffffffff;
1759         u64 qib_pio4koffset = dd->piobufbase >> 32;
1760         u64 qib_pio2klen = dd->piobcnt2k * dd->palign;
1761         u64 qib_pio4klen = dd->piobcnt4k * dd->align4k;
1762         u64 qib_physaddr = dd->physaddr;
1763         u64 qib_piolen;
1764         u64 qib_userlen = 0;
1765
1766         /*
1767          * Free the old mapping because the kernel will try to reuse the
1768          * old mapping and not create a new mapping with the
1769          * write combining attribute.
1770          */
1771         iounmap(dd->kregbase);
1772         dd->kregbase = NULL;
1773
1774         /*
1775          * Assumes chip address space looks like:
1776          *      - kregs + sregs + cregs + uregs (in any order)
1777          *      - piobufs (2K and 4K bufs in either order)
1778          * or:
1779          *      - kregs + sregs + cregs (in any order)
1780          *      - piobufs (2K and 4K bufs in either order)
1781          *      - uregs
1782          */
1783         if (dd->piobcnt4k == 0) {
1784                 qib_kreglen = qib_pio2koffset;
1785                 qib_piolen = qib_pio2klen;
1786         } else if (qib_pio2koffset < qib_pio4koffset) {
1787                 qib_kreglen = qib_pio2koffset;
1788                 qib_piolen = qib_pio4koffset + qib_pio4klen - qib_kreglen;
1789         } else {
1790                 qib_kreglen = qib_pio4koffset;
1791                 qib_piolen = qib_pio2koffset + qib_pio2klen - qib_kreglen;
1792         }
1793         qib_piolen += vl15buflen;
1794         /* Map just the configured ports (not all hw ports) */
1795         if (dd->uregbase > qib_kreglen)
1796                 qib_userlen = dd->ureg_align * dd->cfgctxts;
1797
1798         /* Sanity checks passed, now create the new mappings */
1799         qib_kregbase = ioremap_nocache(qib_physaddr, qib_kreglen);
1800         if (!qib_kregbase)
1801                 goto bail;
1802
1803         qib_piobase = ioremap_wc(qib_physaddr + qib_kreglen, qib_piolen);
1804         if (!qib_piobase)
1805                 goto bail_kregbase;
1806
1807         if (qib_userlen) {
1808                 qib_userbase = ioremap_nocache(qib_physaddr + dd->uregbase,
1809                                                qib_userlen);
1810                 if (!qib_userbase)
1811                         goto bail_piobase;
1812         }
1813
1814         dd->kregbase = qib_kregbase;
1815         dd->kregend = (u64 __iomem *)
1816                 ((char __iomem *) qib_kregbase + qib_kreglen);
1817         dd->piobase = qib_piobase;
1818         dd->pio2kbase = (void __iomem *)
1819                 (((char __iomem *) dd->piobase) +
1820                  qib_pio2koffset - qib_kreglen);
1821         if (dd->piobcnt4k)
1822                 dd->pio4kbase = (void __iomem *)
1823                         (((char __iomem *) dd->piobase) +
1824                          qib_pio4koffset - qib_kreglen);
1825         if (qib_userlen)
1826                 /* ureg will now be accessed relative to dd->userbase */
1827                 dd->userbase = qib_userbase;
1828         return 0;
1829
1830 bail_piobase:
1831         iounmap(qib_piobase);
1832 bail_kregbase:
1833         iounmap(qib_kregbase);
1834 bail:
1835         return -ENOMEM;
1836 }