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 */
  70ushort qib_cfgctxts;
  71module_param_named(cfgctxts, qib_cfgctxts, ushort, S_IRUGO);
  72MODULE_PARM_DESC(cfgctxts, "Set max number of contexts to use");
  73
  74unsigned qib_numa_aware;
  75module_param_named(numa_aware, qib_numa_aware, uint, S_IRUGO);
  76MODULE_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 */
  83ushort qib_mini_init;
  84module_param_named(mini_init, qib_mini_init, ushort, S_IRUGO);
  85MODULE_PARM_DESC(mini_init, "If set, do minimal diag init");
  86
  87unsigned qib_n_krcv_queues;
  88module_param_named(krcvqs, qib_n_krcv_queues, uint, S_IRUGO);
  89MODULE_PARM_DESC(krcvqs, "number of kernel receive queues per IB port");
  90
  91unsigned qib_cc_table_size;
  92module_param_named(cc_table_size, qib_cc_table_size, uint, S_IRUGO);
  93MODULE_PARM_DESC(cc_table_size, "Congestion control table entries 0 (CCA disabled - default), min = 128, max = 1984");
  94
  95static void verify_interrupt(struct timer_list *);
  96
  97DEFINE_XARRAY_FLAGS(qib_dev_table, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
  98u32 qib_cpulist_count;
  99unsigned long *qib_cpulist;
 100
 101/* set number of contexts we'll actually use */
 102void 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 */
 121int 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 */
 165struct 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 */
 220int 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
 281bail_3:
 282	kfree(ppd->ccti_entries_shadow);
 283	ppd->ccti_entries_shadow = NULL;
 284bail_2:
 285	kfree(ppd->congestion_entries);
 286	ppd->congestion_entries = NULL;
 287bail_1:
 288	kfree(ppd->ccti_entries);
 289	ppd->ccti_entries = NULL;
 290bail:
 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
 307static 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
 350done:
 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 */
 365static 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
 384bail_free:
 385	vfree(pages);
 386bail:
 387	dd->pageshadow = NULL;
 388}
 389
 390/*
 391 * Do initialization for device that is only needed on
 392 * first detect, not on resets.
 393 */
 394static 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);
 431done:
 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 */
 443static 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
 468static 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
 494static 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
 516static 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 */
 576static 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;
 595wq_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
 608static 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 */
 632int 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
 737done:
 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
 778int __attribute__((weak)) qib_enable_wc(struct qib_devdata *dd)
 779{
 780	return -EOPNOTSUPP;
 781}
 782
 783void __attribute__((weak)) qib_disable_wc(struct qib_devdata *dd)
 784{
 785}
 786
 787struct 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 */
 796static 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 */
 827static 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 */
 905void 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 */
 963static 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
1025done:
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
1032void 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
1047u64 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
1057u64 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 */
1077struct 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;
1118bail:
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 */
1130void 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
1159static void qib_remove_one(struct pci_dev *);
1160static int qib_init_one(struct pci_dev *, const struct pci_device_id *);
1161static 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
1166static 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
1173MODULE_DEVICE_TABLE(pci, qib_pci_tbl);
1174
1175static 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
1186static int qib_notify_dca(struct notifier_block *, unsigned long, void *);
1187static struct notifier_block dca_notifier = {
1188	.notifier_call  = qib_notify_dca,
1189	.next           = NULL,
1190	.priority       = 0
1191};
1192
1193static 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
1201static 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 */
1217static 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
1246bail_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();
1254bail:
1255	return ret;
1256}
1257
1258module_init(qib_ib_init);
1259
1260/*
1261 * Do the non-unit driver cleanup, memory free, etc. at unload.
1262 */
1263static 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
1288module_exit(qib_ib_cleanup);
1289
1290/* this can only be called after a successful initialization */
1291static 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 */
1375static 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
1394static 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);
1493bail:
1494	return ret;
1495}
1496
1497static 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
1527static 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 */
1543int 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
1597bail_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;
1603bail_free_hdrq:
1604	dma_free_coherent(&dd->pcidev->dev, amt, rcd->rcvhdrq,
1605			  rcd->rcvhdrq_phys);
1606	rcd->rcvhdrq = NULL;
1607bail:
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 */
1620int 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
1696bail_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;
1702bail_rcvegrbuf:
1703	kfree(rcd->rcvegrbuf);
1704	rcd->rcvegrbuf = NULL;
1705bail:
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 */
1715int 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(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(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
1793bail_piobase:
1794	iounmap(qib_piobase);
1795bail_kregbase:
1796	iounmap(qib_kregbase);
1797bail:
1798	return -ENOMEM;
1799}