drivers/infiniband/hw/qib/qib

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This source file includes following definitions.
qib_set_ctxtcnt
qib_create_ctxts
qib_create_ctxtdata
qib_init_pportdata
init_pioavailregs
init_shadow_tids
loadtime_init
init_after_reset
enable_chip
verify_interrupt
init_piobuf_state
qib_create_workqueues
qib_free_pportdata
qib_init
qib_enable_wc
qib_disable_wc
qib_lookup
qib_stop_timers
qib_shutdown_device
qib_free_ctxtdata
qib_verify_pioperf
qib_free_devdata
qib_int_counter
qib_sps_ints
qib_alloc_devdata
qib_disable_after_error
qib_notify_dca_device
qib_notify_dca
qib_ib_init
qib_ib_cleanup
cleanup_device_data
qib_postinit_cleanup
qib_init_one
qib_remove_one
qib_shutdown_one
qib_create_rcvhdrq
qib_setup_eagerbufs
init_chip_wc_pat
   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/module.h>
  40 #include <linux/printk.h>
  41 #ifdef CONFIG_INFINIBAND_QIB_DCA
  42 #include <linux/dca.h>
  43 #endif
  44 #include <rdma/rdma_vt.h>
  45 
  46 #include "qib.h"
  47 #include "qib_common.h"
  48 #include "qib_mad.h"
  49 #ifdef CONFIG_DEBUG_FS
  50 #include "qib_debugfs.h"
  51 #include "qib_verbs.h"
  52 #endif
  53 
  54 #undef pr_fmt
  55 #define pr_fmt(fmt) QIB_DRV_NAME ": " fmt
  56 
  57 /*
  58  * min buffers we want to have per context, after driver
  59  */
  60 #define QIB_MIN_USER_CTXT_BUFCNT 7
  61 
  62 #define QLOGIC_IB_R_SOFTWARE_MASK 0xFF
  63 #define QLOGIC_IB_R_SOFTWARE_SHIFT 24
  64 #define QLOGIC_IB_R_EMULATOR_MASK (1ULL<<62)
  65 
  66 /*
  67  * Number of ctxts we are configured to use (to allow for more pio
  68  * buffers per ctxt, etc.)  Zero means use chip value.
  69  */
  70 ushort qib_cfgctxts;
  71 module_param_named(cfgctxts, qib_cfgctxts, ushort, S_IRUGO);
  72 MODULE_PARM_DESC(cfgctxts, "Set max number of contexts to use");
  73 
  74 unsigned qib_numa_aware;
  75 module_param_named(numa_aware, qib_numa_aware, uint, S_IRUGO);
  76 MODULE_PARM_DESC(numa_aware,
  77         "0 -> PSM allocation close to HCA, 1 -> PSM allocation local to process");
  78 
  79 /*
  80  * If set, do not write to any regs if avoidable, hack to allow
  81  * check for deranged default register values.
  82  */
  83 ushort qib_mini_init;
  84 module_param_named(mini_init, qib_mini_init, ushort, S_IRUGO);
  85 MODULE_PARM_DESC(mini_init, "If set, do minimal diag init");
  86 
  87 unsigned qib_n_krcv_queues;
  88 module_param_named(krcvqs, qib_n_krcv_queues, uint, S_IRUGO);
  89 MODULE_PARM_DESC(krcvqs, "number of kernel receive queues per IB port");
  90 
  91 unsigned qib_cc_table_size;
  92 module_param_named(cc_table_size, qib_cc_table_size, uint, S_IRUGO);
  93 MODULE_PARM_DESC(cc_table_size, "Congestion control table entries 0 (CCA disabled - default), min = 128, max = 1984");
  94 
  95 static void verify_interrupt(struct timer_list *);
  96 
  97 DEFINE_XARRAY_FLAGS(qib_dev_table, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
  98 u32 qib_cpulist_count;
  99 unsigned long *qib_cpulist;
 100 
 101 /* set number of contexts we'll actually use */
 102 void qib_set_ctxtcnt(struct qib_devdata *dd)
 103 {
 104         if (!qib_cfgctxts) {
 105                 dd->cfgctxts = dd->first_user_ctxt + num_online_cpus();
 106                 if (dd->cfgctxts > dd->ctxtcnt)
 107                         dd->cfgctxts = dd->ctxtcnt;
 108         } else if (qib_cfgctxts < dd->num_pports)
 109                 dd->cfgctxts = dd->ctxtcnt;
 110         else if (qib_cfgctxts <= dd->ctxtcnt)
 111                 dd->cfgctxts = qib_cfgctxts;
 112         else
 113                 dd->cfgctxts = dd->ctxtcnt;
 114         dd->freectxts = (dd->first_user_ctxt > dd->cfgctxts) ? 0 :
 115                 dd->cfgctxts - dd->first_user_ctxt;
 116 }
 117 
 118 /*
 119  * Common code for creating the receive context array.
 120  */
 121 int qib_create_ctxts(struct qib_devdata *dd)
 122 {
 123         unsigned i;
 124         int local_node_id = pcibus_to_node(dd->pcidev->bus);
 125 
 126         if (local_node_id < 0)
 127                 local_node_id = numa_node_id();
 128         dd->assigned_node_id = local_node_id;
 129 
 130         /*
 131          * Allocate full ctxtcnt array, rather than just cfgctxts, because
 132          * cleanup iterates across all possible ctxts.
 133          */
 134         dd->rcd = kcalloc(dd->ctxtcnt, sizeof(*dd->rcd), GFP_KERNEL);
 135         if (!dd->rcd)
 136                 return -ENOMEM;
 137 
 138         /* create (one or more) kctxt */
 139         for (i = 0; i < dd->first_user_ctxt; ++i) {
 140                 struct qib_pportdata *ppd;
 141                 struct qib_ctxtdata *rcd;
 142 
 143                 if (dd->skip_kctxt_mask & (1 << i))
 144                         continue;
 145 
 146                 ppd = dd->pport + (i % dd->num_pports);
 147 
 148                 rcd = qib_create_ctxtdata(ppd, i, dd->assigned_node_id);
 149                 if (!rcd) {
 150                         qib_dev_err(dd,
 151                                 "Unable to allocate ctxtdata for Kernel ctxt, failing\n");
 152                         kfree(dd->rcd);
 153                         dd->rcd = NULL;
 154                         return -ENOMEM;
 155                 }
 156                 rcd->pkeys[0] = QIB_DEFAULT_P_KEY;
 157                 rcd->seq_cnt = 1;
 158         }
 159         return 0;
 160 }
 161 
 162 /*
 163  * Common code for user and kernel context setup.
 164  */
 165 struct qib_ctxtdata *qib_create_ctxtdata(struct qib_pportdata *ppd, u32 ctxt,
 166         int node_id)
 167 {
 168         struct qib_devdata *dd = ppd->dd;
 169         struct qib_ctxtdata *rcd;
 170 
 171         rcd = kzalloc_node(sizeof(*rcd), GFP_KERNEL, node_id);
 172         if (rcd) {
 173                 INIT_LIST_HEAD(&rcd->qp_wait_list);
 174                 rcd->node_id = node_id;
 175                 rcd->ppd = ppd;
 176                 rcd->dd = dd;
 177                 rcd->cnt = 1;
 178                 rcd->ctxt = ctxt;
 179                 dd->rcd[ctxt] = rcd;
 180 #ifdef CONFIG_DEBUG_FS
 181                 if (ctxt < dd->first_user_ctxt) { /* N/A for PSM contexts */
 182                         rcd->opstats = kzalloc_node(sizeof(*rcd->opstats),
 183                                 GFP_KERNEL, node_id);
 184                         if (!rcd->opstats) {
 185                                 kfree(rcd);
 186                                 qib_dev_err(dd,
 187                                         "Unable to allocate per ctxt stats buffer\n");
 188                                 return NULL;
 189                         }
 190                 }
 191 #endif
 192                 dd->f_init_ctxt(rcd);
 193 
 194                 /*
 195                  * To avoid wasting a lot of memory, we allocate 32KB chunks
 196                  * of physically contiguous memory, advance through it until
 197                  * used up and then allocate more.  Of course, we need
 198                  * memory to store those extra pointers, now.  32KB seems to
 199                  * be the most that is "safe" under memory pressure
 200                  * (creating large files and then copying them over
 201                  * NFS while doing lots of MPI jobs).  The OOM killer can
 202                  * get invoked, even though we say we can sleep and this can
 203                  * cause significant system problems....
 204                  */
 205                 rcd->rcvegrbuf_size = 0x8000;
 206                 rcd->rcvegrbufs_perchunk =
 207                         rcd->rcvegrbuf_size / dd->rcvegrbufsize;
 208                 rcd->rcvegrbuf_chunks = (rcd->rcvegrcnt +
 209                         rcd->rcvegrbufs_perchunk - 1) /
 210                         rcd->rcvegrbufs_perchunk;
 211                 rcd->rcvegrbufs_perchunk_shift =
 212                         ilog2(rcd->rcvegrbufs_perchunk);
 213         }
 214         return rcd;
 215 }
 216 
 217 /*
 218  * Common code for initializing the physical port structure.
 219  */
 220 int qib_init_pportdata(struct qib_pportdata *ppd, struct qib_devdata *dd,
 221                         u8 hw_pidx, u8 port)
 222 {
 223         int size;
 224 
 225         ppd->dd = dd;
 226         ppd->hw_pidx = hw_pidx;
 227         ppd->port = port; /* IB port number, not index */
 228 
 229         spin_lock_init(&ppd->sdma_lock);
 230         spin_lock_init(&ppd->lflags_lock);
 231         spin_lock_init(&ppd->cc_shadow_lock);
 232         init_waitqueue_head(&ppd->state_wait);
 233 
 234         timer_setup(&ppd->symerr_clear_timer, qib_clear_symerror_on_linkup, 0);
 235 
 236         ppd->qib_wq = NULL;
 237         ppd->ibport_data.pmastats =
 238                 alloc_percpu(struct qib_pma_counters);
 239         if (!ppd->ibport_data.pmastats)
 240                 return -ENOMEM;
 241         ppd->ibport_data.rvp.rc_acks = alloc_percpu(u64);
 242         ppd->ibport_data.rvp.rc_qacks = alloc_percpu(u64);
 243         ppd->ibport_data.rvp.rc_delayed_comp = alloc_percpu(u64);
 244         if (!(ppd->ibport_data.rvp.rc_acks) ||
 245             !(ppd->ibport_data.rvp.rc_qacks) ||
 246             !(ppd->ibport_data.rvp.rc_delayed_comp))
 247                 return -ENOMEM;
 248 
 249         if (qib_cc_table_size < IB_CCT_MIN_ENTRIES)
 250                 goto bail;
 251 
 252         ppd->cc_supported_table_entries = min(max_t(int, qib_cc_table_size,
 253                 IB_CCT_MIN_ENTRIES), IB_CCT_ENTRIES*IB_CC_TABLE_CAP_DEFAULT);
 254 
 255         ppd->cc_max_table_entries =
 256                 ppd->cc_supported_table_entries/IB_CCT_ENTRIES;
 257 
 258         size = IB_CC_TABLE_CAP_DEFAULT * sizeof(struct ib_cc_table_entry)
 259                 * IB_CCT_ENTRIES;
 260         ppd->ccti_entries = kzalloc(size, GFP_KERNEL);
 261         if (!ppd->ccti_entries)
 262                 goto bail;
 263 
 264         size = IB_CC_CCS_ENTRIES * sizeof(struct ib_cc_congestion_entry);
 265         ppd->congestion_entries = kzalloc(size, GFP_KERNEL);
 266         if (!ppd->congestion_entries)
 267                 goto bail_1;
 268 
 269         size = sizeof(struct cc_table_shadow);
 270         ppd->ccti_entries_shadow = kzalloc(size, GFP_KERNEL);
 271         if (!ppd->ccti_entries_shadow)
 272                 goto bail_2;
 273 
 274         size = sizeof(struct ib_cc_congestion_setting_attr);
 275         ppd->congestion_entries_shadow = kzalloc(size, GFP_KERNEL);
 276         if (!ppd->congestion_entries_shadow)
 277                 goto bail_3;
 278 
 279         return 0;
 280 
 281 bail_3:
 282         kfree(ppd->ccti_entries_shadow);
 283         ppd->ccti_entries_shadow = NULL;
 284 bail_2:
 285         kfree(ppd->congestion_entries);
 286         ppd->congestion_entries = NULL;
 287 bail_1:
 288         kfree(ppd->ccti_entries);
 289         ppd->ccti_entries = NULL;
 290 bail:
 291         /* User is intentionally disabling the congestion control agent */
 292         if (!qib_cc_table_size)
 293                 return 0;
 294 
 295         if (qib_cc_table_size < IB_CCT_MIN_ENTRIES) {
 296                 qib_cc_table_size = 0;
 297                 qib_dev_err(dd,
 298                  "Congestion Control table size %d less than minimum %d for port %d\n",
 299                  qib_cc_table_size, IB_CCT_MIN_ENTRIES, port);
 300         }
 301 
 302         qib_dev_err(dd, "Congestion Control Agent disabled for port %d\n",
 303                 port);
 304         return 0;
 305 }
 306 
 307 static int init_pioavailregs(struct qib_devdata *dd)
 308 {
 309         int ret, pidx;
 310         u64 *status_page;
 311 
 312         dd->pioavailregs_dma = dma_alloc_coherent(
 313                 &dd->pcidev->dev, PAGE_SIZE, &dd->pioavailregs_phys,
 314                 GFP_KERNEL);
 315         if (!dd->pioavailregs_dma) {
 316                 qib_dev_err(dd,
 317                         "failed to allocate PIOavail reg area in memory\n");
 318                 ret = -ENOMEM;
 319                 goto done;
 320         }
 321 
 322         /*
 323          * We really want L2 cache aligned, but for current CPUs of
 324          * interest, they are the same.
 325          */
 326         status_page = (u64 *)
 327                 ((char *) dd->pioavailregs_dma +
 328                  ((2 * L1_CACHE_BYTES +
 329                    dd->pioavregs * sizeof(u64)) & ~L1_CACHE_BYTES));
 330         /* device status comes first, for backwards compatibility */
 331         dd->devstatusp = status_page;
 332         *status_page++ = 0;
 333         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 334                 dd->pport[pidx].statusp = status_page;
 335                 *status_page++ = 0;
 336         }
 337 
 338         /*
 339          * Setup buffer to hold freeze and other messages, accessible to
 340          * apps, following statusp.  This is per-unit, not per port.
 341          */
 342         dd->freezemsg = (char *) status_page;
 343         *dd->freezemsg = 0;
 344         /* length of msg buffer is "whatever is left" */
 345         ret = (char *) status_page - (char *) dd->pioavailregs_dma;
 346         dd->freezelen = PAGE_SIZE - ret;
 347 
 348         ret = 0;
 349 
 350 done:
 351         return ret;
 352 }
 353 
 354 /**
 355  * init_shadow_tids - allocate the shadow TID array
 356  * @dd: the qlogic_ib device
 357  *
 358  * allocate the shadow TID array, so we can qib_munlock previous
 359  * entries.  It may make more sense to move the pageshadow to the
 360  * ctxt data structure, so we only allocate memory for ctxts actually
 361  * in use, since we at 8k per ctxt, now.
 362  * We don't want failures here to prevent use of the driver/chip,
 363  * so no return value.
 364  */
 365 static void init_shadow_tids(struct qib_devdata *dd)
 366 {
 367         struct page **pages;
 368         dma_addr_t *addrs;
 369 
 370         pages = vzalloc(array_size(sizeof(struct page *),
 371                                    dd->cfgctxts * dd->rcvtidcnt));
 372         if (!pages)
 373                 goto bail;
 374 
 375         addrs = vzalloc(array_size(sizeof(dma_addr_t),
 376                                    dd->cfgctxts * dd->rcvtidcnt));
 377         if (!addrs)
 378                 goto bail_free;
 379 
 380         dd->pageshadow = pages;
 381         dd->physshadow = addrs;
 382         return;
 383 
 384 bail_free:
 385         vfree(pages);
 386 bail:
 387         dd->pageshadow = NULL;
 388 }
 389 
 390 /*
 391  * Do initialization for device that is only needed on
 392  * first detect, not on resets.
 393  */
 394 static int loadtime_init(struct qib_devdata *dd)
 395 {
 396         int ret = 0;
 397 
 398         if (((dd->revision >> QLOGIC_IB_R_SOFTWARE_SHIFT) &
 399              QLOGIC_IB_R_SOFTWARE_MASK) != QIB_CHIP_SWVERSION) {
 400                 qib_dev_err(dd,
 401                         "Driver only handles version %d, chip swversion is %d (%llx), failing\n",
 402                         QIB_CHIP_SWVERSION,
 403                         (int)(dd->revision >>
 404                                 QLOGIC_IB_R_SOFTWARE_SHIFT) &
 405                                 QLOGIC_IB_R_SOFTWARE_MASK,
 406                         (unsigned long long) dd->revision);
 407                 ret = -ENOSYS;
 408                 goto done;
 409         }
 410 
 411         if (dd->revision & QLOGIC_IB_R_EMULATOR_MASK)
 412                 qib_devinfo(dd->pcidev, "%s", dd->boardversion);
 413 
 414         spin_lock_init(&dd->pioavail_lock);
 415         spin_lock_init(&dd->sendctrl_lock);
 416         spin_lock_init(&dd->uctxt_lock);
 417         spin_lock_init(&dd->qib_diag_trans_lock);
 418         spin_lock_init(&dd->eep_st_lock);
 419         mutex_init(&dd->eep_lock);
 420 
 421         if (qib_mini_init)
 422                 goto done;
 423 
 424         ret = init_pioavailregs(dd);
 425         init_shadow_tids(dd);
 426 
 427         qib_get_eeprom_info(dd);
 428 
 429         /* setup time (don't start yet) to verify we got interrupt */
 430         timer_setup(&dd->intrchk_timer, verify_interrupt, 0);
 431 done:
 432         return ret;
 433 }
 434 
 435 /**
 436  * init_after_reset - re-initialize after a reset
 437  * @dd: the qlogic_ib device
 438  *
 439  * sanity check at least some of the values after reset, and
 440  * ensure no receive or transmit (explicitly, in case reset
 441  * failed
 442  */
 443 static int init_after_reset(struct qib_devdata *dd)
 444 {
 445         int i;
 446 
 447         /*
 448          * Ensure chip does no sends or receives, tail updates, or
 449          * pioavail updates while we re-initialize.  This is mostly
 450          * for the driver data structures, not chip registers.
 451          */
 452         for (i = 0; i < dd->num_pports; ++i) {
 453                 /*
 454                  * ctxt == -1 means "all contexts". Only really safe for
 455                  * _dis_abling things, as here.
 456                  */
 457                 dd->f_rcvctrl(dd->pport + i, QIB_RCVCTRL_CTXT_DIS |
 458                                   QIB_RCVCTRL_INTRAVAIL_DIS |
 459                                   QIB_RCVCTRL_TAILUPD_DIS, -1);
 460                 /* Redundant across ports for some, but no big deal.  */
 461                 dd->f_sendctrl(dd->pport + i, QIB_SENDCTRL_SEND_DIS |
 462                         QIB_SENDCTRL_AVAIL_DIS);
 463         }
 464 
 465         return 0;
 466 }
 467 
 468 static void enable_chip(struct qib_devdata *dd)
 469 {
 470         u64 rcvmask;
 471         int i;
 472 
 473         /*
 474          * Enable PIO send, and update of PIOavail regs to memory.
 475          */
 476         for (i = 0; i < dd->num_pports; ++i)
 477                 dd->f_sendctrl(dd->pport + i, QIB_SENDCTRL_SEND_ENB |
 478                         QIB_SENDCTRL_AVAIL_ENB);
 479         /*
 480          * Enable kernel ctxts' receive and receive interrupt.
 481          * Other ctxts done as user opens and inits them.
 482          */
 483         rcvmask = QIB_RCVCTRL_CTXT_ENB | QIB_RCVCTRL_INTRAVAIL_ENB;
 484         rcvmask |= (dd->flags & QIB_NODMA_RTAIL) ?
 485                   QIB_RCVCTRL_TAILUPD_DIS : QIB_RCVCTRL_TAILUPD_ENB;
 486         for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
 487                 struct qib_ctxtdata *rcd = dd->rcd[i];
 488 
 489                 if (rcd)
 490                         dd->f_rcvctrl(rcd->ppd, rcvmask, i);
 491         }
 492 }
 493 
 494 static void verify_interrupt(struct timer_list *t)
 495 {
 496         struct qib_devdata *dd = from_timer(dd, t, intrchk_timer);
 497         u64 int_counter;
 498 
 499         if (!dd)
 500                 return; /* being torn down */
 501 
 502         /*
 503          * If we don't have a lid or any interrupts, let the user know and
 504          * don't bother checking again.
 505          */
 506         int_counter = qib_int_counter(dd) - dd->z_int_counter;
 507         if (int_counter == 0) {
 508                 if (!dd->f_intr_fallback(dd))
 509                         dev_err(&dd->pcidev->dev,
 510                                 "No interrupts detected, not usable.\n");
 511                 else /* re-arm the timer to see if fallback works */
 512                         mod_timer(&dd->intrchk_timer, jiffies + HZ/2);
 513         }
 514 }
 515 
 516 static void init_piobuf_state(struct qib_devdata *dd)
 517 {
 518         int i, pidx;
 519         u32 uctxts;
 520 
 521         /*
 522          * Ensure all buffers are free, and fifos empty.  Buffers
 523          * are common, so only do once for port 0.
 524          *
 525          * After enable and qib_chg_pioavailkernel so we can safely
 526          * enable pioavail updates and PIOENABLE.  After this, packets
 527          * are ready and able to go out.
 528          */
 529         dd->f_sendctrl(dd->pport, QIB_SENDCTRL_DISARM_ALL);
 530         for (pidx = 0; pidx < dd->num_pports; ++pidx)
 531                 dd->f_sendctrl(dd->pport + pidx, QIB_SENDCTRL_FLUSH);
 532 
 533         /*
 534          * If not all sendbufs are used, add the one to each of the lower
 535          * numbered contexts.  pbufsctxt and lastctxt_piobuf are
 536          * calculated in chip-specific code because it may cause some
 537          * chip-specific adjustments to be made.
 538          */
 539         uctxts = dd->cfgctxts - dd->first_user_ctxt;
 540         dd->ctxts_extrabuf = dd->pbufsctxt ?
 541                 dd->lastctxt_piobuf - (dd->pbufsctxt * uctxts) : 0;
 542 
 543         /*
 544          * Set up the shadow copies of the piobufavail registers,
 545          * which we compare against the chip registers for now, and
 546          * the in memory DMA'ed copies of the registers.
 547          * By now pioavail updates to memory should have occurred, so
 548          * copy them into our working/shadow registers; this is in
 549          * case something went wrong with abort, but mostly to get the
 550          * initial values of the generation bit correct.
 551          */
 552         for (i = 0; i < dd->pioavregs; i++) {
 553                 __le64 tmp;
 554 
 555                 tmp = dd->pioavailregs_dma[i];
 556                 /*
 557                  * Don't need to worry about pioavailkernel here
 558                  * because we will call qib_chg_pioavailkernel() later
 559                  * in initialization, to busy out buffers as needed.
 560                  */
 561                 dd->pioavailshadow[i] = le64_to_cpu(tmp);
 562         }
 563         while (i < ARRAY_SIZE(dd->pioavailshadow))
 564                 dd->pioavailshadow[i++] = 0; /* for debugging sanity */
 565 
 566         /* after pioavailshadow is setup */
 567         qib_chg_pioavailkernel(dd, 0, dd->piobcnt2k + dd->piobcnt4k,
 568                                TXCHK_CHG_TYPE_KERN, NULL);
 569         dd->f_initvl15_bufs(dd);
 570 }
 571 
 572 /**
 573  * qib_create_workqueues - create per port workqueues
 574  * @dd: the qlogic_ib device
 575  */
 576 static int qib_create_workqueues(struct qib_devdata *dd)
 577 {
 578         int pidx;
 579         struct qib_pportdata *ppd;
 580 
 581         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 582                 ppd = dd->pport + pidx;
 583                 if (!ppd->qib_wq) {
 584                         char wq_name[8]; /* 3 + 2 + 1 + 1 + 1 */
 585 
 586                         snprintf(wq_name, sizeof(wq_name), "qib%d_%d",
 587                                 dd->unit, pidx);
 588                         ppd->qib_wq = alloc_ordered_workqueue(wq_name,
 589                                                               WQ_MEM_RECLAIM);
 590                         if (!ppd->qib_wq)
 591                                 goto wq_error;
 592                 }
 593         }
 594         return 0;
 595 wq_error:
 596         pr_err("create_singlethread_workqueue failed for port %d\n",
 597                 pidx + 1);
 598         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 599                 ppd = dd->pport + pidx;
 600                 if (ppd->qib_wq) {
 601                         destroy_workqueue(ppd->qib_wq);
 602                         ppd->qib_wq = NULL;
 603                 }
 604         }
 605         return -ENOMEM;
 606 }
 607 
 608 static void qib_free_pportdata(struct qib_pportdata *ppd)
 609 {
 610         free_percpu(ppd->ibport_data.pmastats);
 611         free_percpu(ppd->ibport_data.rvp.rc_acks);
 612         free_percpu(ppd->ibport_data.rvp.rc_qacks);
 613         free_percpu(ppd->ibport_data.rvp.rc_delayed_comp);
 614         ppd->ibport_data.pmastats = NULL;
 615 }
 616 
 617 /**
 618  * qib_init - do the actual initialization sequence on the chip
 619  * @dd: the qlogic_ib device
 620  * @reinit: reinitializing, so don't allocate new memory
 621  *
 622  * Do the actual initialization sequence on the chip.  This is done
 623  * both from the init routine called from the PCI infrastructure, and
 624  * when we reset the chip, or detect that it was reset internally,
 625  * or it's administratively re-enabled.
 626  *
 627  * Memory allocation here and in called routines is only done in
 628  * the first case (reinit == 0).  We have to be careful, because even
 629  * without memory allocation, we need to re-write all the chip registers
 630  * TIDs, etc. after the reset or enable has completed.
 631  */
 632 int qib_init(struct qib_devdata *dd, int reinit)
 633 {
 634         int ret = 0, pidx, lastfail = 0;
 635         u32 portok = 0;
 636         unsigned i;
 637         struct qib_ctxtdata *rcd;
 638         struct qib_pportdata *ppd;
 639         unsigned long flags;
 640 
 641         /* Set linkstate to unknown, so we can watch for a transition. */
 642         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 643                 ppd = dd->pport + pidx;
 644                 spin_lock_irqsave(&ppd->lflags_lock, flags);
 645                 ppd->lflags &= ~(QIBL_LINKACTIVE | QIBL_LINKARMED |
 646                                  QIBL_LINKDOWN | QIBL_LINKINIT |
 647                                  QIBL_LINKV);
 648                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
 649         }
 650 
 651         if (reinit)
 652                 ret = init_after_reset(dd);
 653         else
 654                 ret = loadtime_init(dd);
 655         if (ret)
 656                 goto done;
 657 
 658         /* Bypass most chip-init, to get to device creation */
 659         if (qib_mini_init)
 660                 return 0;
 661 
 662         ret = dd->f_late_initreg(dd);
 663         if (ret)
 664                 goto done;
 665 
 666         /* dd->rcd can be NULL if early init failed */
 667         for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
 668                 /*
 669                  * Set up the (kernel) rcvhdr queue and egr TIDs.  If doing
 670                  * re-init, the simplest way to handle this is to free
 671                  * existing, and re-allocate.
 672                  * Need to re-create rest of ctxt 0 ctxtdata as well.
 673                  */
 674                 rcd = dd->rcd[i];
 675                 if (!rcd)
 676                         continue;
 677 
 678                 lastfail = qib_create_rcvhdrq(dd, rcd);
 679                 if (!lastfail)
 680                         lastfail = qib_setup_eagerbufs(rcd);
 681                 if (lastfail)
 682                         qib_dev_err(dd,
 683                                 "failed to allocate kernel ctxt's rcvhdrq and/or egr bufs\n");
 684         }
 685 
 686         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 687                 int mtu;
 688 
 689                 if (lastfail)
 690                         ret = lastfail;
 691                 ppd = dd->pport + pidx;
 692                 mtu = ib_mtu_enum_to_int(qib_ibmtu);
 693                 if (mtu == -1) {
 694                         mtu = QIB_DEFAULT_MTU;
 695                         qib_ibmtu = 0; /* don't leave invalid value */
 696                 }
 697                 /* set max we can ever have for this driver load */
 698                 ppd->init_ibmaxlen = min(mtu > 2048 ?
 699                                          dd->piosize4k : dd->piosize2k,
 700                                          dd->rcvegrbufsize +
 701                                          (dd->rcvhdrentsize << 2));
 702                 /*
 703                  * Have to initialize ibmaxlen, but this will normally
 704                  * change immediately in qib_set_mtu().
 705                  */
 706                 ppd->ibmaxlen = ppd->init_ibmaxlen;
 707                 qib_set_mtu(ppd, mtu);
 708 
 709                 spin_lock_irqsave(&ppd->lflags_lock, flags);
 710                 ppd->lflags |= QIBL_IB_LINK_DISABLED;
 711                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
 712 
 713                 lastfail = dd->f_bringup_serdes(ppd);
 714                 if (lastfail) {
 715                         qib_devinfo(dd->pcidev,
 716                                  "Failed to bringup IB port %u\n", ppd->port);
 717                         lastfail = -ENETDOWN;
 718                         continue;
 719                 }
 720 
 721                 portok++;
 722         }
 723 
 724         if (!portok) {
 725                 /* none of the ports initialized */
 726                 if (!ret && lastfail)
 727                         ret = lastfail;
 728                 else if (!ret)
 729                         ret = -ENETDOWN;
 730                 /* but continue on, so we can debug cause */
 731         }
 732 
 733         enable_chip(dd);
 734 
 735         init_piobuf_state(dd);
 736 
 737 done:
 738         if (!ret) {
 739                 /* chip is OK for user apps; mark it as initialized */
 740                 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 741                         ppd = dd->pport + pidx;
 742                         /*
 743                          * Set status even if port serdes is not initialized
 744                          * so that diags will work.
 745                          */
 746                         *ppd->statusp |= QIB_STATUS_CHIP_PRESENT |
 747                                 QIB_STATUS_INITTED;
 748                         if (!ppd->link_speed_enabled)
 749                                 continue;
 750                         if (dd->flags & QIB_HAS_SEND_DMA)
 751                                 ret = qib_setup_sdma(ppd);
 752                         timer_setup(&ppd->hol_timer, qib_hol_event, 0);
 753                         ppd->hol_state = QIB_HOL_UP;
 754                 }
 755 
 756                 /* now we can enable all interrupts from the chip */
 757                 dd->f_set_intr_state(dd, 1);
 758 
 759                 /*
 760                  * Setup to verify we get an interrupt, and fallback
 761                  * to an alternate if necessary and possible.
 762                  */
 763                 mod_timer(&dd->intrchk_timer, jiffies + HZ/2);
 764                 /* start stats retrieval timer */
 765                 mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
 766         }
 767 
 768         /* if ret is non-zero, we probably should do some cleanup here... */
 769         return ret;
 770 }
 771 
 772 /*
 773  * These next two routines are placeholders in case we don't have per-arch
 774  * code for controlling write combining.  If explicit control of write
 775  * combining is not available, performance will probably be awful.
 776  */
 777 
 778 int __attribute__((weak)) qib_enable_wc(struct qib_devdata *dd)
 779 {
 780         return -EOPNOTSUPP;
 781 }
 782 
 783 void __attribute__((weak)) qib_disable_wc(struct qib_devdata *dd)
 784 {
 785 }
 786 
 787 struct qib_devdata *qib_lookup(int unit)
 788 {
 789         return xa_load(&qib_dev_table, unit);
 790 }
 791 
 792 /*
 793  * Stop the timers during unit shutdown, or after an error late
 794  * in initialization.
 795  */
 796 static void qib_stop_timers(struct qib_devdata *dd)
 797 {
 798         struct qib_pportdata *ppd;
 799         int pidx;
 800 
 801         if (dd->stats_timer.function)
 802                 del_timer_sync(&dd->stats_timer);
 803         if (dd->intrchk_timer.function)
 804                 del_timer_sync(&dd->intrchk_timer);
 805         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 806                 ppd = dd->pport + pidx;
 807                 if (ppd->hol_timer.function)
 808                         del_timer_sync(&ppd->hol_timer);
 809                 if (ppd->led_override_timer.function) {
 810                         del_timer_sync(&ppd->led_override_timer);
 811                         atomic_set(&ppd->led_override_timer_active, 0);
 812                 }
 813                 if (ppd->symerr_clear_timer.function)
 814                         del_timer_sync(&ppd->symerr_clear_timer);
 815         }
 816 }
 817 
 818 /**
 819  * qib_shutdown_device - shut down a device
 820  * @dd: the qlogic_ib device
 821  *
 822  * This is called to make the device quiet when we are about to
 823  * unload the driver, and also when the device is administratively
 824  * disabled.   It does not free any data structures.
 825  * Everything it does has to be setup again by qib_init(dd, 1)
 826  */
 827 static void qib_shutdown_device(struct qib_devdata *dd)
 828 {
 829         struct qib_pportdata *ppd;
 830         unsigned pidx;
 831 
 832         if (dd->flags & QIB_SHUTDOWN)
 833                 return;
 834         dd->flags |= QIB_SHUTDOWN;
 835 
 836         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 837                 ppd = dd->pport + pidx;
 838 
 839                 spin_lock_irq(&ppd->lflags_lock);
 840                 ppd->lflags &= ~(QIBL_LINKDOWN | QIBL_LINKINIT |
 841                                  QIBL_LINKARMED | QIBL_LINKACTIVE |
 842                                  QIBL_LINKV);
 843                 spin_unlock_irq(&ppd->lflags_lock);
 844                 *ppd->statusp &= ~(QIB_STATUS_IB_CONF | QIB_STATUS_IB_READY);
 845         }
 846         dd->flags &= ~QIB_INITTED;
 847 
 848         /* mask interrupts, but not errors */
 849         dd->f_set_intr_state(dd, 0);
 850 
 851         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 852                 ppd = dd->pport + pidx;
 853                 dd->f_rcvctrl(ppd, QIB_RCVCTRL_TAILUPD_DIS |
 854                                    QIB_RCVCTRL_CTXT_DIS |
 855                                    QIB_RCVCTRL_INTRAVAIL_DIS |
 856                                    QIB_RCVCTRL_PKEY_ENB, -1);
 857                 /*
 858                  * Gracefully stop all sends allowing any in progress to
 859                  * trickle out first.
 860                  */
 861                 dd->f_sendctrl(ppd, QIB_SENDCTRL_CLEAR);
 862         }
 863 
 864         /*
 865          * Enough for anything that's going to trickle out to have actually
 866          * done so.
 867          */
 868         udelay(20);
 869 
 870         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 871                 ppd = dd->pport + pidx;
 872                 dd->f_setextled(ppd, 0); /* make sure LEDs are off */
 873 
 874                 if (dd->flags & QIB_HAS_SEND_DMA)
 875                         qib_teardown_sdma(ppd);
 876 
 877                 dd->f_sendctrl(ppd, QIB_SENDCTRL_AVAIL_DIS |
 878                                     QIB_SENDCTRL_SEND_DIS);
 879                 /*
 880                  * Clear SerdesEnable.
 881                  * We can't count on interrupts since we are stopping.
 882                  */
 883                 dd->f_quiet_serdes(ppd);
 884 
 885                 if (ppd->qib_wq) {
 886                         destroy_workqueue(ppd->qib_wq);
 887                         ppd->qib_wq = NULL;
 888                 }
 889                 qib_free_pportdata(ppd);
 890         }
 891 
 892 }
 893 
 894 /**
 895  * qib_free_ctxtdata - free a context's allocated data
 896  * @dd: the qlogic_ib device
 897  * @rcd: the ctxtdata structure
 898  *
 899  * free up any allocated data for a context
 900  * This should not touch anything that would affect a simultaneous
 901  * re-allocation of context data, because it is called after qib_mutex
 902  * is released (and can be called from reinit as well).
 903  * It should never change any chip state, or global driver state.
 904  */
 905 void qib_free_ctxtdata(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
 906 {
 907         if (!rcd)
 908                 return;
 909 
 910         if (rcd->rcvhdrq) {
 911                 dma_free_coherent(&dd->pcidev->dev, rcd->rcvhdrq_size,
 912                                   rcd->rcvhdrq, rcd->rcvhdrq_phys);
 913                 rcd->rcvhdrq = NULL;
 914                 if (rcd->rcvhdrtail_kvaddr) {
 915                         dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
 916                                           rcd->rcvhdrtail_kvaddr,
 917                                           rcd->rcvhdrqtailaddr_phys);
 918                         rcd->rcvhdrtail_kvaddr = NULL;
 919                 }
 920         }
 921         if (rcd->rcvegrbuf) {
 922                 unsigned e;
 923 
 924                 for (e = 0; e < rcd->rcvegrbuf_chunks; e++) {
 925                         void *base = rcd->rcvegrbuf[e];
 926                         size_t size = rcd->rcvegrbuf_size;
 927 
 928                         dma_free_coherent(&dd->pcidev->dev, size,
 929                                           base, rcd->rcvegrbuf_phys[e]);
 930                 }
 931                 kfree(rcd->rcvegrbuf);
 932                 rcd->rcvegrbuf = NULL;
 933                 kfree(rcd->rcvegrbuf_phys);
 934                 rcd->rcvegrbuf_phys = NULL;
 935                 rcd->rcvegrbuf_chunks = 0;
 936         }
 937 
 938         kfree(rcd->tid_pg_list);
 939         vfree(rcd->user_event_mask);
 940         vfree(rcd->subctxt_uregbase);
 941         vfree(rcd->subctxt_rcvegrbuf);
 942         vfree(rcd->subctxt_rcvhdr_base);
 943 #ifdef CONFIG_DEBUG_FS
 944         kfree(rcd->opstats);
 945         rcd->opstats = NULL;
 946 #endif
 947         kfree(rcd);
 948 }
 949 
 950 /*
 951  * Perform a PIO buffer bandwidth write test, to verify proper system
 952  * configuration.  Even when all the setup calls work, occasionally
 953  * BIOS or other issues can prevent write combining from working, or
 954  * can cause other bandwidth problems to the chip.
 955  *
 956  * This test simply writes the same buffer over and over again, and
 957  * measures close to the peak bandwidth to the chip (not testing
 958  * data bandwidth to the wire).   On chips that use an address-based
 959  * trigger to send packets to the wire, this is easy.  On chips that
 960  * use a count to trigger, we want to make sure that the packet doesn't
 961  * go out on the wire, or trigger flow control checks.
 962  */
 963 static void qib_verify_pioperf(struct qib_devdata *dd)
 964 {
 965         u32 pbnum, cnt, lcnt;
 966         u32 __iomem *piobuf;
 967         u32 *addr;
 968         u64 msecs, emsecs;
 969 
 970         piobuf = dd->f_getsendbuf(dd->pport, 0ULL, &pbnum);
 971         if (!piobuf) {
 972                 qib_devinfo(dd->pcidev,
 973                          "No PIObufs for checking perf, skipping\n");
 974                 return;
 975         }
 976 
 977         /*
 978          * Enough to give us a reasonable test, less than piobuf size, and
 979          * likely multiple of store buffer length.
 980          */
 981         cnt = 1024;
 982 
 983         addr = vmalloc(cnt);
 984         if (!addr)
 985                 goto done;
 986 
 987         preempt_disable();  /* we want reasonably accurate elapsed time */
 988         msecs = 1 + jiffies_to_msecs(jiffies);
 989         for (lcnt = 0; lcnt < 10000U; lcnt++) {
 990                 /* wait until we cross msec boundary */
 991                 if (jiffies_to_msecs(jiffies) >= msecs)
 992                         break;
 993                 udelay(1);
 994         }
 995 
 996         dd->f_set_armlaunch(dd, 0);
 997 
 998         /*
 999          * length 0, no dwords actually sent
1000          */
1001         writeq(0, piobuf);
1002         qib_flush_wc();
1003 
1004         /*
1005          * This is only roughly accurate, since even with preempt we
1006          * still take interrupts that could take a while.   Running for
1007          * >= 5 msec seems to get us "close enough" to accurate values.
1008          */
1009         msecs = jiffies_to_msecs(jiffies);
1010         for (emsecs = lcnt = 0; emsecs <= 5UL; lcnt++) {
1011                 qib_pio_copy(piobuf + 64, addr, cnt >> 2);
1012                 emsecs = jiffies_to_msecs(jiffies) - msecs;
1013         }
1014 
1015         /* 1 GiB/sec, slightly over IB SDR line rate */
1016         if (lcnt < (emsecs * 1024U))
1017                 qib_dev_err(dd,
1018                             "Performance problem: bandwidth to PIO buffers is only %u MiB/sec\n",
1019                             lcnt / (u32) emsecs);
1020 
1021         preempt_enable();
1022 
1023         vfree(addr);
1024 
1025 done:
1026         /* disarm piobuf, so it's available again */
1027         dd->f_sendctrl(dd->pport, QIB_SENDCTRL_DISARM_BUF(pbnum));
1028         qib_sendbuf_done(dd, pbnum);
1029         dd->f_set_armlaunch(dd, 1);
1030 }
1031 
1032 void qib_free_devdata(struct qib_devdata *dd)
1033 {
1034         unsigned long flags;
1035 
1036         xa_lock_irqsave(&qib_dev_table, flags);
1037         __xa_erase(&qib_dev_table, dd->unit);
1038         xa_unlock_irqrestore(&qib_dev_table, flags);
1039 
1040 #ifdef CONFIG_DEBUG_FS
1041         qib_dbg_ibdev_exit(&dd->verbs_dev);
1042 #endif
1043         free_percpu(dd->int_counter);
1044         rvt_dealloc_device(&dd->verbs_dev.rdi);
1045 }
1046 
1047 u64 qib_int_counter(struct qib_devdata *dd)
1048 {
1049         int cpu;
1050         u64 int_counter = 0;
1051 
1052         for_each_possible_cpu(cpu)
1053                 int_counter += *per_cpu_ptr(dd->int_counter, cpu);
1054         return int_counter;
1055 }
1056 
1057 u64 qib_sps_ints(void)
1058 {
1059         unsigned long index, flags;
1060         struct qib_devdata *dd;
1061         u64 sps_ints = 0;
1062 
1063         xa_lock_irqsave(&qib_dev_table, flags);
1064         xa_for_each(&qib_dev_table, index, dd) {
1065                 sps_ints += qib_int_counter(dd);
1066         }
1067         xa_unlock_irqrestore(&qib_dev_table, flags);
1068         return sps_ints;
1069 }
1070 
1071 /*
1072  * Allocate our primary per-unit data structure.  Must be done via verbs
1073  * allocator, because the verbs cleanup process both does cleanup and
1074  * free of the data structure.
1075  * "extra" is for chip-specific data.
1076  */
1077 struct qib_devdata *qib_alloc_devdata(struct pci_dev *pdev, size_t extra)
1078 {
1079         struct qib_devdata *dd;
1080         int ret, nports;
1081 
1082         /* extra is * number of ports */
1083         nports = extra / sizeof(struct qib_pportdata);
1084         dd = (struct qib_devdata *)rvt_alloc_device(sizeof(*dd) + extra,
1085                                                     nports);
1086         if (!dd)
1087                 return ERR_PTR(-ENOMEM);
1088 
1089         ret = xa_alloc_irq(&qib_dev_table, &dd->unit, dd, xa_limit_32b,
1090                         GFP_KERNEL);
1091         if (ret < 0) {
1092                 qib_early_err(&pdev->dev,
1093                               "Could not allocate unit ID: error %d\n", -ret);
1094                 goto bail;
1095         }
1096         rvt_set_ibdev_name(&dd->verbs_dev.rdi, "%s%d", "qib", dd->unit);
1097 
1098         dd->int_counter = alloc_percpu(u64);
1099         if (!dd->int_counter) {
1100                 ret = -ENOMEM;
1101                 qib_early_err(&pdev->dev,
1102                               "Could not allocate per-cpu int_counter\n");
1103                 goto bail;
1104         }
1105 
1106         if (!qib_cpulist_count) {
1107                 u32 count = num_online_cpus();
1108 
1109                 qib_cpulist = kcalloc(BITS_TO_LONGS(count), sizeof(long),
1110                                       GFP_KERNEL);
1111                 if (qib_cpulist)
1112                         qib_cpulist_count = count;
1113         }
1114 #ifdef CONFIG_DEBUG_FS
1115         qib_dbg_ibdev_init(&dd->verbs_dev);
1116 #endif
1117         return dd;
1118 bail:
1119         if (!list_empty(&dd->list))
1120                 list_del_init(&dd->list);
1121         rvt_dealloc_device(&dd->verbs_dev.rdi);
1122         return ERR_PTR(ret);
1123 }
1124 
1125 /*
1126  * Called from freeze mode handlers, and from PCI error
1127  * reporting code.  Should be paranoid about state of
1128  * system and data structures.
1129  */
1130 void qib_disable_after_error(struct qib_devdata *dd)
1131 {
1132         if (dd->flags & QIB_INITTED) {
1133                 u32 pidx;
1134 
1135                 dd->flags &= ~QIB_INITTED;
1136                 if (dd->pport)
1137                         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1138                                 struct qib_pportdata *ppd;
1139 
1140                                 ppd = dd->pport + pidx;
1141                                 if (dd->flags & QIB_PRESENT) {
1142                                         qib_set_linkstate(ppd,
1143                                                 QIB_IB_LINKDOWN_DISABLE);
1144                                         dd->f_setextled(ppd, 0);
1145                                 }
1146                                 *ppd->statusp &= ~QIB_STATUS_IB_READY;
1147                         }
1148         }
1149 
1150         /*
1151          * Mark as having had an error for driver, and also
1152          * for /sys and status word mapped to user programs.
1153          * This marks unit as not usable, until reset.
1154          */
1155         if (dd->devstatusp)
1156                 *dd->devstatusp |= QIB_STATUS_HWERROR;
1157 }
1158 
1159 static void qib_remove_one(struct pci_dev *);
1160 static int qib_init_one(struct pci_dev *, const struct pci_device_id *);
1161 static void qib_shutdown_one(struct pci_dev *);
1162 
1163 #define DRIVER_LOAD_MSG "Intel " QIB_DRV_NAME " loaded: "
1164 #define PFX QIB_DRV_NAME ": "
1165 
1166 static const struct pci_device_id qib_pci_tbl[] = {
1167         { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_QLOGIC_IB_6120) },
1168         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_IB_7220) },
1169         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_IB_7322) },
1170         { 0, }
1171 };
1172 
1173 MODULE_DEVICE_TABLE(pci, qib_pci_tbl);
1174 
1175 static struct pci_driver qib_driver = {
1176         .name = QIB_DRV_NAME,
1177         .probe = qib_init_one,
1178         .remove = qib_remove_one,
1179         .shutdown = qib_shutdown_one,
1180         .id_table = qib_pci_tbl,
1181         .err_handler = &qib_pci_err_handler,
1182 };
1183 
1184 #ifdef CONFIG_INFINIBAND_QIB_DCA
1185 
1186 static int qib_notify_dca(struct notifier_block *, unsigned long, void *);
1187 static struct notifier_block dca_notifier = {
1188         .notifier_call  = qib_notify_dca,
1189         .next           = NULL,
1190         .priority       = 0
1191 };
1192 
1193 static int qib_notify_dca_device(struct device *device, void *data)
1194 {
1195         struct qib_devdata *dd = dev_get_drvdata(device);
1196         unsigned long event = *(unsigned long *)data;
1197 
1198         return dd->f_notify_dca(dd, event);
1199 }
1200 
1201 static int qib_notify_dca(struct notifier_block *nb, unsigned long event,
1202                                           void *p)
1203 {
1204         int rval;
1205 
1206         rval = driver_for_each_device(&qib_driver.driver, NULL,
1207                                       &event, qib_notify_dca_device);
1208         return rval ? NOTIFY_BAD : NOTIFY_DONE;
1209 }
1210 
1211 #endif
1212 
1213 /*
1214  * Do all the generic driver unit- and chip-independent memory
1215  * allocation and initialization.
1216  */
1217 static int __init qib_ib_init(void)
1218 {
1219         int ret;
1220 
1221         ret = qib_dev_init();
1222         if (ret)
1223                 goto bail;
1224 
1225         /*
1226          * These must be called before the driver is registered with
1227          * the PCI subsystem.
1228          */
1229 #ifdef CONFIG_INFINIBAND_QIB_DCA
1230         dca_register_notify(&dca_notifier);
1231 #endif
1232 #ifdef CONFIG_DEBUG_FS
1233         qib_dbg_init();
1234 #endif
1235         ret = pci_register_driver(&qib_driver);
1236         if (ret < 0) {
1237                 pr_err("Unable to register driver: error %d\n", -ret);
1238                 goto bail_dev;
1239         }
1240 
1241         /* not fatal if it doesn't work */
1242         if (qib_init_qibfs())
1243                 pr_err("Unable to register ipathfs\n");
1244         goto bail; /* all OK */
1245 
1246 bail_dev:
1247 #ifdef CONFIG_INFINIBAND_QIB_DCA
1248         dca_unregister_notify(&dca_notifier);
1249 #endif
1250 #ifdef CONFIG_DEBUG_FS
1251         qib_dbg_exit();
1252 #endif
1253         qib_dev_cleanup();
1254 bail:
1255         return ret;
1256 }
1257 
1258 module_init(qib_ib_init);
1259 
1260 /*
1261  * Do the non-unit driver cleanup, memory free, etc. at unload.
1262  */
1263 static void __exit qib_ib_cleanup(void)
1264 {
1265         int ret;
1266 
1267         ret = qib_exit_qibfs();
1268         if (ret)
1269                 pr_err(
1270                         "Unable to cleanup counter filesystem: error %d\n",
1271                         -ret);
1272 
1273 #ifdef CONFIG_INFINIBAND_QIB_DCA
1274         dca_unregister_notify(&dca_notifier);
1275 #endif
1276         pci_unregister_driver(&qib_driver);
1277 #ifdef CONFIG_DEBUG_FS
1278         qib_dbg_exit();
1279 #endif
1280 
1281         qib_cpulist_count = 0;
1282         kfree(qib_cpulist);
1283 
1284         WARN_ON(!xa_empty(&qib_dev_table));
1285         qib_dev_cleanup();
1286 }
1287 
1288 module_exit(qib_ib_cleanup);
1289 
1290 /* this can only be called after a successful initialization */
1291 static void cleanup_device_data(struct qib_devdata *dd)
1292 {
1293         int ctxt;
1294         int pidx;
1295         struct qib_ctxtdata **tmp;
1296         unsigned long flags;
1297 
1298         /* users can't do anything more with chip */
1299         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1300                 if (dd->pport[pidx].statusp)
1301                         *dd->pport[pidx].statusp &= ~QIB_STATUS_CHIP_PRESENT;
1302 
1303                 spin_lock(&dd->pport[pidx].cc_shadow_lock);
1304 
1305                 kfree(dd->pport[pidx].congestion_entries);
1306                 dd->pport[pidx].congestion_entries = NULL;
1307                 kfree(dd->pport[pidx].ccti_entries);
1308                 dd->pport[pidx].ccti_entries = NULL;
1309                 kfree(dd->pport[pidx].ccti_entries_shadow);
1310                 dd->pport[pidx].ccti_entries_shadow = NULL;
1311                 kfree(dd->pport[pidx].congestion_entries_shadow);
1312                 dd->pport[pidx].congestion_entries_shadow = NULL;
1313 
1314                 spin_unlock(&dd->pport[pidx].cc_shadow_lock);
1315         }
1316 
1317         qib_disable_wc(dd);
1318 
1319         if (dd->pioavailregs_dma) {
1320                 dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
1321                                   (void *) dd->pioavailregs_dma,
1322                                   dd->pioavailregs_phys);
1323                 dd->pioavailregs_dma = NULL;
1324         }
1325 
1326         if (dd->pageshadow) {
1327                 struct page **tmpp = dd->pageshadow;
1328                 dma_addr_t *tmpd = dd->physshadow;
1329                 int i;
1330 
1331                 for (ctxt = 0; ctxt < dd->cfgctxts; ctxt++) {
1332                         int ctxt_tidbase = ctxt * dd->rcvtidcnt;
1333                         int maxtid = ctxt_tidbase + dd->rcvtidcnt;
1334 
1335                         for (i = ctxt_tidbase; i < maxtid; i++) {
1336                                 if (!tmpp[i])
1337                                         continue;
1338                                 pci_unmap_page(dd->pcidev, tmpd[i],
1339                                                PAGE_SIZE, PCI_DMA_FROMDEVICE);
1340                                 qib_release_user_pages(&tmpp[i], 1);
1341                                 tmpp[i] = NULL;
1342                         }
1343                 }
1344 
1345                 dd->pageshadow = NULL;
1346                 vfree(tmpp);
1347                 dd->physshadow = NULL;
1348                 vfree(tmpd);
1349         }
1350 
1351         /*
1352          * Free any resources still in use (usually just kernel contexts)
1353          * at unload; we do for ctxtcnt, because that's what we allocate.
1354          * We acquire lock to be really paranoid that rcd isn't being
1355          * accessed from some interrupt-related code (that should not happen,
1356          * but best to be sure).
1357          */
1358         spin_lock_irqsave(&dd->uctxt_lock, flags);
1359         tmp = dd->rcd;
1360         dd->rcd = NULL;
1361         spin_unlock_irqrestore(&dd->uctxt_lock, flags);
1362         for (ctxt = 0; tmp && ctxt < dd->ctxtcnt; ctxt++) {
1363                 struct qib_ctxtdata *rcd = tmp[ctxt];
1364 
1365                 tmp[ctxt] = NULL; /* debugging paranoia */
1366                 qib_free_ctxtdata(dd, rcd);
1367         }
1368         kfree(tmp);
1369 }
1370 
1371 /*
1372  * Clean up on unit shutdown, or error during unit load after
1373  * successful initialization.
1374  */
1375 static void qib_postinit_cleanup(struct qib_devdata *dd)
1376 {
1377         /*
1378          * Clean up chip-specific stuff.
1379          * We check for NULL here, because it's outside
1380          * the kregbase check, and we need to call it
1381          * after the free_irq.  Thus it's possible that
1382          * the function pointers were never initialized.
1383          */
1384         if (dd->f_cleanup)
1385                 dd->f_cleanup(dd);
1386 
1387         qib_pcie_ddcleanup(dd);
1388 
1389         cleanup_device_data(dd);
1390 
1391         qib_free_devdata(dd);
1392 }
1393 
1394 static int qib_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1395 {
1396         int ret, j, pidx, initfail;
1397         struct qib_devdata *dd = NULL;
1398 
1399         ret = qib_pcie_init(pdev, ent);
1400         if (ret)
1401                 goto bail;
1402 
1403         /*
1404          * Do device-specific initialiation, function table setup, dd
1405          * allocation, etc.
1406          */
1407         switch (ent->device) {
1408         case PCI_DEVICE_ID_QLOGIC_IB_6120:
1409 #ifdef CONFIG_PCI_MSI
1410                 dd = qib_init_iba6120_funcs(pdev, ent);
1411 #else
1412                 qib_early_err(&pdev->dev,
1413                         "Intel PCIE device 0x%x cannot work if CONFIG_PCI_MSI is not enabled\n",
1414                         ent->device);
1415                 dd = ERR_PTR(-ENODEV);
1416 #endif
1417                 break;
1418 
1419         case PCI_DEVICE_ID_QLOGIC_IB_7220:
1420                 dd = qib_init_iba7220_funcs(pdev, ent);
1421                 break;
1422 
1423         case PCI_DEVICE_ID_QLOGIC_IB_7322:
1424                 dd = qib_init_iba7322_funcs(pdev, ent);
1425                 break;
1426 
1427         default:
1428                 qib_early_err(&pdev->dev,
1429                         "Failing on unknown Intel deviceid 0x%x\n",
1430                         ent->device);
1431                 ret = -ENODEV;
1432         }
1433 
1434         if (IS_ERR(dd))
1435                 ret = PTR_ERR(dd);
1436         if (ret)
1437                 goto bail; /* error already printed */
1438 
1439         ret = qib_create_workqueues(dd);
1440         if (ret)
1441                 goto bail;
1442 
1443         /* do the generic initialization */
1444         initfail = qib_init(dd, 0);
1445 
1446         ret = qib_register_ib_device(dd);
1447 
1448         /*
1449          * Now ready for use.  this should be cleared whenever we
1450          * detect a reset, or initiate one.  If earlier failure,
1451          * we still create devices, so diags, etc. can be used
1452          * to determine cause of problem.
1453          */
1454         if (!qib_mini_init && !initfail && !ret)
1455                 dd->flags |= QIB_INITTED;
1456 
1457         j = qib_device_create(dd);
1458         if (j)
1459                 qib_dev_err(dd, "Failed to create /dev devices: %d\n", -j);
1460         j = qibfs_add(dd);
1461         if (j)
1462                 qib_dev_err(dd, "Failed filesystem setup for counters: %d\n",
1463                             -j);
1464 
1465         if (qib_mini_init || initfail || ret) {
1466                 qib_stop_timers(dd);
1467                 flush_workqueue(ib_wq);
1468                 for (pidx = 0; pidx < dd->num_pports; ++pidx)
1469                         dd->f_quiet_serdes(dd->pport + pidx);
1470                 if (qib_mini_init)
1471                         goto bail;
1472                 if (!j) {
1473                         (void) qibfs_remove(dd);
1474                         qib_device_remove(dd);
1475                 }
1476                 if (!ret)
1477                         qib_unregister_ib_device(dd);
1478                 qib_postinit_cleanup(dd);
1479                 if (initfail)
1480                         ret = initfail;
1481                 goto bail;
1482         }
1483 
1484         ret = qib_enable_wc(dd);
1485         if (ret) {
1486                 qib_dev_err(dd,
1487                         "Write combining not enabled (err %d): performance may be poor\n",
1488                         -ret);
1489                 ret = 0;
1490         }
1491 
1492         qib_verify_pioperf(dd);
1493 bail:
1494         return ret;
1495 }
1496 
1497 static void qib_remove_one(struct pci_dev *pdev)
1498 {
1499         struct qib_devdata *dd = pci_get_drvdata(pdev);
1500         int ret;
1501 
1502         /* unregister from IB core */
1503         qib_unregister_ib_device(dd);
1504 
1505         /*
1506          * Disable the IB link, disable interrupts on the device,
1507          * clear dma engines, etc.
1508          */
1509         if (!qib_mini_init)
1510                 qib_shutdown_device(dd);
1511 
1512         qib_stop_timers(dd);
1513 
1514         /* wait until all of our (qsfp) queue_work() calls complete */
1515         flush_workqueue(ib_wq);
1516 
1517         ret = qibfs_remove(dd);
1518         if (ret)
1519                 qib_dev_err(dd, "Failed counters filesystem cleanup: %d\n",
1520                             -ret);
1521 
1522         qib_device_remove(dd);
1523 
1524         qib_postinit_cleanup(dd);
1525 }
1526 
1527 static void qib_shutdown_one(struct pci_dev *pdev)
1528 {
1529         struct qib_devdata *dd = pci_get_drvdata(pdev);
1530 
1531         qib_shutdown_device(dd);
1532 }
1533 
1534 /**
1535  * qib_create_rcvhdrq - create a receive header queue
1536  * @dd: the qlogic_ib device
1537  * @rcd: the context data
1538  *
1539  * This must be contiguous memory (from an i/o perspective), and must be
1540  * DMA'able (which means for some systems, it will go through an IOMMU,
1541  * or be forced into a low address range).
1542  */
1543 int qib_create_rcvhdrq(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
1544 {
1545         unsigned amt;
1546         int old_node_id;
1547 
1548         if (!rcd->rcvhdrq) {
1549                 dma_addr_t phys_hdrqtail;
1550                 gfp_t gfp_flags;
1551 
1552                 amt = ALIGN(dd->rcvhdrcnt * dd->rcvhdrentsize *
1553                             sizeof(u32), PAGE_SIZE);
1554                 gfp_flags = (rcd->ctxt >= dd->first_user_ctxt) ?
1555                         GFP_USER : GFP_KERNEL;
1556 
1557                 old_node_id = dev_to_node(&dd->pcidev->dev);
1558                 set_dev_node(&dd->pcidev->dev, rcd->node_id);
1559                 rcd->rcvhdrq = dma_alloc_coherent(
1560                         &dd->pcidev->dev, amt, &rcd->rcvhdrq_phys,
1561                         gfp_flags | __GFP_COMP);
1562                 set_dev_node(&dd->pcidev->dev, old_node_id);
1563 
1564                 if (!rcd->rcvhdrq) {
1565                         qib_dev_err(dd,
1566                                 "attempt to allocate %d bytes for ctxt %u rcvhdrq failed\n",
1567                                 amt, rcd->ctxt);
1568                         goto bail;
1569                 }
1570 
1571                 if (rcd->ctxt >= dd->first_user_ctxt) {
1572                         rcd->user_event_mask = vmalloc_user(PAGE_SIZE);
1573                         if (!rcd->user_event_mask)
1574                                 goto bail_free_hdrq;
1575                 }
1576 
1577                 if (!(dd->flags & QIB_NODMA_RTAIL)) {
1578                         set_dev_node(&dd->pcidev->dev, rcd->node_id);
1579                         rcd->rcvhdrtail_kvaddr = dma_alloc_coherent(
1580                                 &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail,
1581                                 gfp_flags);
1582                         set_dev_node(&dd->pcidev->dev, old_node_id);
1583                         if (!rcd->rcvhdrtail_kvaddr)
1584                                 goto bail_free;
1585                         rcd->rcvhdrqtailaddr_phys = phys_hdrqtail;
1586                 }
1587 
1588                 rcd->rcvhdrq_size = amt;
1589         }
1590 
1591         /* clear for security and sanity on each use */
1592         memset(rcd->rcvhdrq, 0, rcd->rcvhdrq_size);
1593         if (rcd->rcvhdrtail_kvaddr)
1594                 memset(rcd->rcvhdrtail_kvaddr, 0, PAGE_SIZE);
1595         return 0;
1596 
1597 bail_free:
1598         qib_dev_err(dd,
1599                 "attempt to allocate 1 page for ctxt %u rcvhdrqtailaddr failed\n",
1600                 rcd->ctxt);
1601         vfree(rcd->user_event_mask);
1602         rcd->user_event_mask = NULL;
1603 bail_free_hdrq:
1604         dma_free_coherent(&dd->pcidev->dev, amt, rcd->rcvhdrq,
1605                           rcd->rcvhdrq_phys);
1606         rcd->rcvhdrq = NULL;
1607 bail:
1608         return -ENOMEM;
1609 }
1610 
1611 /**
1612  * allocate eager buffers, both kernel and user contexts.
1613  * @rcd: the context we are setting up.
1614  *
1615  * Allocate the eager TID buffers and program them into hip.
1616  * They are no longer completely contiguous, we do multiple allocation
1617  * calls.  Otherwise we get the OOM code involved, by asking for too
1618  * much per call, with disastrous results on some kernels.
1619  */
1620 int qib_setup_eagerbufs(struct qib_ctxtdata *rcd)
1621 {
1622         struct qib_devdata *dd = rcd->dd;
1623         unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
1624         size_t size;
1625         gfp_t gfp_flags;
1626         int old_node_id;
1627 
1628         /*
1629          * GFP_USER, but without GFP_FS, so buffer cache can be
1630          * coalesced (we hope); otherwise, even at order 4,
1631          * heavy filesystem activity makes these fail, and we can
1632          * use compound pages.
1633          */
1634         gfp_flags = __GFP_RECLAIM | __GFP_IO | __GFP_COMP;
1635 
1636         egrcnt = rcd->rcvegrcnt;
1637         egroff = rcd->rcvegr_tid_base;
1638         egrsize = dd->rcvegrbufsize;
1639 
1640         chunk = rcd->rcvegrbuf_chunks;
1641         egrperchunk = rcd->rcvegrbufs_perchunk;
1642         size = rcd->rcvegrbuf_size;
1643         if (!rcd->rcvegrbuf) {
1644                 rcd->rcvegrbuf =
1645                         kcalloc_node(chunk, sizeof(rcd->rcvegrbuf[0]),
1646                                      GFP_KERNEL, rcd->node_id);
1647                 if (!rcd->rcvegrbuf)
1648                         goto bail;
1649         }
1650         if (!rcd->rcvegrbuf_phys) {
1651                 rcd->rcvegrbuf_phys =
1652                         kmalloc_array_node(chunk,
1653                                            sizeof(rcd->rcvegrbuf_phys[0]),
1654                                            GFP_KERNEL, rcd->node_id);
1655                 if (!rcd->rcvegrbuf_phys)
1656                         goto bail_rcvegrbuf;
1657         }
1658         for (e = 0; e < rcd->rcvegrbuf_chunks; e++) {
1659                 if (rcd->rcvegrbuf[e])
1660                         continue;
1661 
1662                 old_node_id = dev_to_node(&dd->pcidev->dev);
1663                 set_dev_node(&dd->pcidev->dev, rcd->node_id);
1664                 rcd->rcvegrbuf[e] =
1665                         dma_alloc_coherent(&dd->pcidev->dev, size,
1666                                            &rcd->rcvegrbuf_phys[e],
1667                                            gfp_flags);
1668                 set_dev_node(&dd->pcidev->dev, old_node_id);
1669                 if (!rcd->rcvegrbuf[e])
1670                         goto bail_rcvegrbuf_phys;
1671         }
1672 
1673         rcd->rcvegr_phys = rcd->rcvegrbuf_phys[0];
1674 
1675         for (e = chunk = 0; chunk < rcd->rcvegrbuf_chunks; chunk++) {
1676                 dma_addr_t pa = rcd->rcvegrbuf_phys[chunk];
1677                 unsigned i;
1678 
1679                 /* clear for security and sanity on each use */
1680                 memset(rcd->rcvegrbuf[chunk], 0, size);
1681 
1682                 for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
1683                         dd->f_put_tid(dd, e + egroff +
1684                                           (u64 __iomem *)
1685                                           ((char __iomem *)
1686                                            dd->kregbase +
1687                                            dd->rcvegrbase),
1688                                           RCVHQ_RCV_TYPE_EAGER, pa);
1689                         pa += egrsize;
1690                 }
1691                 cond_resched(); /* don't hog the cpu */
1692         }
1693 
1694         return 0;
1695 
1696 bail_rcvegrbuf_phys:
1697         for (e = 0; e < rcd->rcvegrbuf_chunks && rcd->rcvegrbuf[e]; e++)
1698                 dma_free_coherent(&dd->pcidev->dev, size,
1699                                   rcd->rcvegrbuf[e], rcd->rcvegrbuf_phys[e]);
1700         kfree(rcd->rcvegrbuf_phys);
1701         rcd->rcvegrbuf_phys = NULL;
1702 bail_rcvegrbuf:
1703         kfree(rcd->rcvegrbuf);
1704         rcd->rcvegrbuf = NULL;
1705 bail:
1706         return -ENOMEM;
1707 }
1708 
1709 /*
1710  * Note: Changes to this routine should be mirrored
1711  * for the diagnostics routine qib_remap_ioaddr32().
1712  * There is also related code for VL15 buffers in qib_init_7322_variables().
1713  * The teardown code that unmaps is in qib_pcie_ddcleanup()
1714  */
1715 int init_chip_wc_pat(struct qib_devdata *dd, u32 vl15buflen)
1716 {
1717         u64 __iomem *qib_kregbase = NULL;
1718         void __iomem *qib_piobase = NULL;
1719         u64 __iomem *qib_userbase = NULL;
1720         u64 qib_kreglen;
1721         u64 qib_pio2koffset = dd->piobufbase & 0xffffffff;
1722         u64 qib_pio4koffset = dd->piobufbase >> 32;
1723         u64 qib_pio2klen = dd->piobcnt2k * dd->palign;
1724         u64 qib_pio4klen = dd->piobcnt4k * dd->align4k;
1725         u64 qib_physaddr = dd->physaddr;
1726         u64 qib_piolen;
1727         u64 qib_userlen = 0;
1728 
1729         /*
1730          * Free the old mapping because the kernel will try to reuse the
1731          * old mapping and not create a new mapping with the
1732          * write combining attribute.
1733          */
1734         iounmap(dd->kregbase);
1735         dd->kregbase = NULL;
1736 
1737         /*
1738          * Assumes chip address space looks like:
1739          *      - kregs + sregs + cregs + uregs (in any order)
1740          *      - piobufs (2K and 4K bufs in either order)
1741          * or:
1742          *      - kregs + sregs + cregs (in any order)
1743          *      - piobufs (2K and 4K bufs in either order)
1744          *      - uregs
1745          */
1746         if (dd->piobcnt4k == 0) {
1747                 qib_kreglen = qib_pio2koffset;
1748                 qib_piolen = qib_pio2klen;
1749         } else if (qib_pio2koffset < qib_pio4koffset) {
1750                 qib_kreglen = qib_pio2koffset;
1751                 qib_piolen = qib_pio4koffset + qib_pio4klen - qib_kreglen;
1752         } else {
1753                 qib_kreglen = qib_pio4koffset;
1754                 qib_piolen = qib_pio2koffset + qib_pio2klen - qib_kreglen;
1755         }
1756         qib_piolen += vl15buflen;
1757         /* Map just the configured ports (not all hw ports) */
1758         if (dd->uregbase > qib_kreglen)
1759                 qib_userlen = dd->ureg_align * dd->cfgctxts;
1760 
1761         /* Sanity checks passed, now create the new mappings */
1762         qib_kregbase = ioremap_nocache(qib_physaddr, qib_kreglen);
1763         if (!qib_kregbase)
1764                 goto bail;
1765 
1766         qib_piobase = ioremap_wc(qib_physaddr + qib_kreglen, qib_piolen);
1767         if (!qib_piobase)
1768                 goto bail_kregbase;
1769 
1770         if (qib_userlen) {
1771                 qib_userbase = ioremap_nocache(qib_physaddr + dd->uregbase,
1772                                                qib_userlen);
1773                 if (!qib_userbase)
1774                         goto bail_piobase;
1775         }
1776 
1777         dd->kregbase = qib_kregbase;
1778         dd->kregend = (u64 __iomem *)
1779                 ((char __iomem *) qib_kregbase + qib_kreglen);
1780         dd->piobase = qib_piobase;
1781         dd->pio2kbase = (void __iomem *)
1782                 (((char __iomem *) dd->piobase) +
1783                  qib_pio2koffset - qib_kreglen);
1784         if (dd->piobcnt4k)
1785                 dd->pio4kbase = (void __iomem *)
1786                         (((char __iomem *) dd->piobase) +
1787                          qib_pio4koffset - qib_kreglen);
1788         if (qib_userlen)
1789                 /* ureg will now be accessed relative to dd->userbase */
1790                 dd->userbase = qib_userbase;
1791         return 0;
1792 
1793 bail_piobase:
1794         iounmap(qib_piobase);
1795 bail_kregbase:
1796         iounmap(qib_kregbase);
1797 bail:
1798         return -ENOMEM;
1799 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/infiniband/hw/qib/qib_init.c

DEFINITIONS
