blob: 3a15efee73875a3c764ede384239655bd8c57733 [file] [log] [blame]
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001/*
Bryan O'Sullivan759d5762006-07-01 04:35:49 -07002 * Copyright (c) 2006 QLogic, Inc. All rights reserved.
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08003 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#include <linux/spinlock.h>
35#include <linux/idr.h>
36#include <linux/pci.h>
37#include <linux/delay.h>
38#include <linux/netdevice.h>
39#include <linux/vmalloc.h>
40
41#include "ipath_kernel.h"
Bryan O'Sullivanb1c1b6a2006-08-25 11:24:31 -070042#include "ipath_verbs.h"
Bryan O'Sullivan27b678d2006-07-01 04:36:17 -070043#include "ipath_common.h"
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -080044
45static void ipath_update_pio_bufs(struct ipath_devdata *);
46
47const char *ipath_get_unit_name(int unit)
48{
49 static char iname[16];
50 snprintf(iname, sizeof iname, "infinipath%u", unit);
51 return iname;
52}
53
Bryan O'Sullivan759d5762006-07-01 04:35:49 -070054#define DRIVER_LOAD_MSG "QLogic " IPATH_DRV_NAME " loaded: "
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -080055#define PFX IPATH_DRV_NAME ": "
56
57/*
58 * The size has to be longer than this string, so we can append
59 * board/chip information to it in the init code.
60 */
Bryan O'Sullivanb55f4f02006-08-25 11:24:33 -070061const char ib_ipath_version[] = IPATH_IDSTR "\n";
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -080062
63static struct idr unit_table;
64DEFINE_SPINLOCK(ipath_devs_lock);
65LIST_HEAD(ipath_dev_list);
66
Bryan O'Sullivan0fd41362006-08-25 11:24:34 -070067wait_queue_head_t ipath_state_wait;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -080068
69unsigned ipath_debug = __IPATH_INFO;
70
71module_param_named(debug, ipath_debug, uint, S_IWUSR | S_IRUGO);
72MODULE_PARM_DESC(debug, "mask for debug prints");
73EXPORT_SYMBOL_GPL(ipath_debug);
74
75MODULE_LICENSE("GPL");
Bryan O'Sullivan759d5762006-07-01 04:35:49 -070076MODULE_AUTHOR("QLogic <support@pathscale.com>");
77MODULE_DESCRIPTION("QLogic InfiniPath driver");
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -080078
79const char *ipath_ibcstatus_str[] = {
80 "Disabled",
81 "LinkUp",
82 "PollActive",
83 "PollQuiet",
84 "SleepDelay",
85 "SleepQuiet",
86 "LState6", /* unused */
87 "LState7", /* unused */
88 "CfgDebounce",
89 "CfgRcvfCfg",
90 "CfgWaitRmt",
91 "CfgIdle",
92 "RecovRetrain",
93 "LState0xD", /* unused */
94 "RecovWaitRmt",
95 "RecovIdle",
96};
97
98/*
99 * These variables are initialized in the chip-specific files
100 * but are defined here.
101 */
102u16 ipath_gpio_sda_num, ipath_gpio_scl_num;
103u64 ipath_gpio_sda, ipath_gpio_scl;
104u64 infinipath_i_bitsextant;
105ipath_err_t infinipath_e_bitsextant, infinipath_hwe_bitsextant;
106u32 infinipath_i_rcvavail_mask, infinipath_i_rcvurg_mask;
107
108static void __devexit ipath_remove_one(struct pci_dev *);
109static int __devinit ipath_init_one(struct pci_dev *,
110 const struct pci_device_id *);
111
112/* Only needed for registration, nothing else needs this info */
113#define PCI_VENDOR_ID_PATHSCALE 0x1fc1
114#define PCI_DEVICE_ID_INFINIPATH_HT 0xd
115#define PCI_DEVICE_ID_INFINIPATH_PE800 0x10
116
117static const struct pci_device_id ipath_pci_tbl[] = {
Roland Dreier6f4bb3d2006-05-12 14:57:52 -0700118 { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_HT) },
119 { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_PE800) },
120 { 0, }
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800121};
122
123MODULE_DEVICE_TABLE(pci, ipath_pci_tbl);
124
125static struct pci_driver ipath_driver = {
126 .name = IPATH_DRV_NAME,
127 .probe = ipath_init_one,
128 .remove = __devexit_p(ipath_remove_one),
129 .id_table = ipath_pci_tbl,
130};
131
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800132
133static inline void read_bars(struct ipath_devdata *dd, struct pci_dev *dev,
134 u32 *bar0, u32 *bar1)
135{
136 int ret;
137
138 ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
139 if (ret)
140 ipath_dev_err(dd, "failed to read bar0 before enable: "
141 "error %d\n", -ret);
142
143 ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, bar1);
144 if (ret)
145 ipath_dev_err(dd, "failed to read bar1 before enable: "
146 "error %d\n", -ret);
147
148 ipath_dbg("Read bar0 %x bar1 %x\n", *bar0, *bar1);
149}
150
151static void ipath_free_devdata(struct pci_dev *pdev,
152 struct ipath_devdata *dd)
153{
154 unsigned long flags;
155
156 pci_set_drvdata(pdev, NULL);
157
158 if (dd->ipath_unit != -1) {
159 spin_lock_irqsave(&ipath_devs_lock, flags);
160 idr_remove(&unit_table, dd->ipath_unit);
161 list_del(&dd->ipath_list);
162 spin_unlock_irqrestore(&ipath_devs_lock, flags);
163 }
Bryan O'Sullivan06993ca2006-07-01 04:36:02 -0700164 vfree(dd);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800165}
166
167static struct ipath_devdata *ipath_alloc_devdata(struct pci_dev *pdev)
168{
169 unsigned long flags;
170 struct ipath_devdata *dd;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800171 int ret;
172
173 if (!idr_pre_get(&unit_table, GFP_KERNEL)) {
174 dd = ERR_PTR(-ENOMEM);
175 goto bail;
176 }
177
Bryan O'Sullivan06993ca2006-07-01 04:36:02 -0700178 dd = vmalloc(sizeof(*dd));
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800179 if (!dd) {
180 dd = ERR_PTR(-ENOMEM);
181 goto bail;
182 }
Bryan O'Sullivan06993ca2006-07-01 04:36:02 -0700183 memset(dd, 0, sizeof(*dd));
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800184 dd->ipath_unit = -1;
185
186 spin_lock_irqsave(&ipath_devs_lock, flags);
187
188 ret = idr_get_new(&unit_table, dd, &dd->ipath_unit);
189 if (ret < 0) {
190 printk(KERN_ERR IPATH_DRV_NAME
191 ": Could not allocate unit ID: error %d\n", -ret);
192 ipath_free_devdata(pdev, dd);
193 dd = ERR_PTR(ret);
194 goto bail_unlock;
195 }
196
197 dd->pcidev = pdev;
198 pci_set_drvdata(pdev, dd);
199
200 list_add(&dd->ipath_list, &ipath_dev_list);
201
202bail_unlock:
203 spin_unlock_irqrestore(&ipath_devs_lock, flags);
204
205bail:
206 return dd;
207}
208
209static inline struct ipath_devdata *__ipath_lookup(int unit)
210{
211 return idr_find(&unit_table, unit);
212}
213
214struct ipath_devdata *ipath_lookup(int unit)
215{
216 struct ipath_devdata *dd;
217 unsigned long flags;
218
219 spin_lock_irqsave(&ipath_devs_lock, flags);
220 dd = __ipath_lookup(unit);
221 spin_unlock_irqrestore(&ipath_devs_lock, flags);
222
223 return dd;
224}
225
226int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp)
227{
228 int nunits, npresent, nup;
229 struct ipath_devdata *dd;
230 unsigned long flags;
231 u32 maxports;
232
233 nunits = npresent = nup = maxports = 0;
234
235 spin_lock_irqsave(&ipath_devs_lock, flags);
236
237 list_for_each_entry(dd, &ipath_dev_list, ipath_list) {
238 nunits++;
239 if ((dd->ipath_flags & IPATH_PRESENT) && dd->ipath_kregbase)
240 npresent++;
241 if (dd->ipath_lid &&
242 !(dd->ipath_flags & (IPATH_DISABLED | IPATH_LINKDOWN
243 | IPATH_LINKUNK)))
244 nup++;
245 if (dd->ipath_cfgports > maxports)
246 maxports = dd->ipath_cfgports;
247 }
248
249 spin_unlock_irqrestore(&ipath_devs_lock, flags);
250
251 if (npresentp)
252 *npresentp = npresent;
253 if (nupp)
254 *nupp = nup;
255 if (maxportsp)
256 *maxportsp = maxports;
257
258 return nunits;
259}
260
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800261/*
262 * These next two routines are placeholders in case we don't have per-arch
263 * code for controlling write combining. If explicit control of write
264 * combining is not available, performance will probably be awful.
265 */
266
267int __attribute__((weak)) ipath_enable_wc(struct ipath_devdata *dd)
268{
269 return -EOPNOTSUPP;
270}
271
272void __attribute__((weak)) ipath_disable_wc(struct ipath_devdata *dd)
273{
274}
275
276static int __devinit ipath_init_one(struct pci_dev *pdev,
277 const struct pci_device_id *ent)
278{
279 int ret, len, j;
280 struct ipath_devdata *dd;
281 unsigned long long addr;
282 u32 bar0 = 0, bar1 = 0;
283 u8 rev;
284
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800285 dd = ipath_alloc_devdata(pdev);
286 if (IS_ERR(dd)) {
287 ret = PTR_ERR(dd);
288 printk(KERN_ERR IPATH_DRV_NAME
289 ": Could not allocate devdata: error %d\n", -ret);
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -0700290 goto bail;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800291 }
292
293 ipath_cdbg(VERBOSE, "initializing unit #%u\n", dd->ipath_unit);
294
295 read_bars(dd, pdev, &bar0, &bar1);
296
297 ret = pci_enable_device(pdev);
298 if (ret) {
299 /* This can happen iff:
300 *
301 * We did a chip reset, and then failed to reprogram the
302 * BAR, or the chip reset due to an internal error. We then
303 * unloaded the driver and reloaded it.
304 *
305 * Both reset cases set the BAR back to initial state. For
306 * the latter case, the AER sticky error bit at offset 0x718
307 * should be set, but the Linux kernel doesn't yet know
308 * about that, it appears. If the original BAR was retained
309 * in the kernel data structures, this may be OK.
310 */
311 ipath_dev_err(dd, "enable unit %d failed: error %d\n",
312 dd->ipath_unit, -ret);
313 goto bail_devdata;
314 }
315 addr = pci_resource_start(pdev, 0);
316 len = pci_resource_len(pdev, 0);
317 ipath_cdbg(VERBOSE, "regbase (0) %llx len %d irq %x, vend %x/%x "
318 "driver_data %lx\n", addr, len, pdev->irq, ent->vendor,
319 ent->device, ent->driver_data);
320
321 read_bars(dd, pdev, &bar0, &bar1);
322
323 if (!bar1 && !(bar0 & ~0xf)) {
324 if (addr) {
325 dev_info(&pdev->dev, "BAR is 0 (probable RESET), "
326 "rewriting as %llx\n", addr);
327 ret = pci_write_config_dword(
328 pdev, PCI_BASE_ADDRESS_0, addr);
329 if (ret) {
330 ipath_dev_err(dd, "rewrite of BAR0 "
331 "failed: err %d\n", -ret);
332 goto bail_disable;
333 }
334 ret = pci_write_config_dword(
335 pdev, PCI_BASE_ADDRESS_1, addr >> 32);
336 if (ret) {
337 ipath_dev_err(dd, "rewrite of BAR1 "
338 "failed: err %d\n", -ret);
339 goto bail_disable;
340 }
341 } else {
342 ipath_dev_err(dd, "BAR is 0 (probable RESET), "
343 "not usable until reboot\n");
344 ret = -ENODEV;
345 goto bail_disable;
346 }
347 }
348
349 ret = pci_request_regions(pdev, IPATH_DRV_NAME);
350 if (ret) {
351 dev_info(&pdev->dev, "pci_request_regions unit %u fails: "
352 "err %d\n", dd->ipath_unit, -ret);
353 goto bail_disable;
354 }
355
356 ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
357 if (ret) {
Bryan O'Sullivan68dd43a2006-04-24 14:22:58 -0700358 /*
359 * if the 64 bit setup fails, try 32 bit. Some systems
360 * do not setup 64 bit maps on systems with 2GB or less
361 * memory installed.
362 */
363 ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
364 if (ret) {
Bryan O'Sullivanb1d88652006-07-01 04:35:59 -0700365 dev_info(&pdev->dev,
366 "Unable to set DMA mask for unit %u: %d\n",
367 dd->ipath_unit, ret);
Bryan O'Sullivan68dd43a2006-04-24 14:22:58 -0700368 goto bail_regions;
369 }
Bryan O'Sullivanb1d88652006-07-01 04:35:59 -0700370 else {
Bryan O'Sullivan68dd43a2006-04-24 14:22:58 -0700371 ipath_dbg("No 64bit DMA mask, used 32 bit mask\n");
Bryan O'Sullivanb1d88652006-07-01 04:35:59 -0700372 ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
373 if (ret)
374 dev_info(&pdev->dev,
375 "Unable to set DMA consistent mask "
376 "for unit %u: %d\n",
377 dd->ipath_unit, ret);
378
379 }
380 }
381 else {
382 ret = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
383 if (ret)
384 dev_info(&pdev->dev,
385 "Unable to set DMA consistent mask "
386 "for unit %u: %d\n",
387 dd->ipath_unit, ret);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800388 }
389
390 pci_set_master(pdev);
391
392 /*
393 * Save BARs to rewrite after device reset. Save all 64 bits of
394 * BAR, just in case.
395 */
396 dd->ipath_pcibar0 = addr;
397 dd->ipath_pcibar1 = addr >> 32;
398 dd->ipath_deviceid = ent->device; /* save for later use */
399 dd->ipath_vendorid = ent->vendor;
400
401 /* setup the chip-specific functions, as early as possible. */
402 switch (ent->device) {
403 case PCI_DEVICE_ID_INFINIPATH_HT:
Bryan O'Sullivan525d0ca2006-08-25 11:24:39 -0700404 ipath_init_iba6110_funcs(dd);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800405 break;
406 case PCI_DEVICE_ID_INFINIPATH_PE800:
Bryan O'Sullivan525d0ca2006-08-25 11:24:39 -0700407 ipath_init_iba6120_funcs(dd);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800408 break;
409 default:
Bryan O'Sullivan759d5762006-07-01 04:35:49 -0700410 ipath_dev_err(dd, "Found unknown QLogic deviceid 0x%x, "
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800411 "failing\n", ent->device);
412 return -ENODEV;
413 }
414
415 for (j = 0; j < 6; j++) {
416 if (!pdev->resource[j].start)
417 continue;
Greg Kroah-Hartmane29419f2006-06-12 15:20:16 -0700418 ipath_cdbg(VERBOSE, "BAR %d start %llx, end %llx, len %llx\n",
419 j, (unsigned long long)pdev->resource[j].start,
420 (unsigned long long)pdev->resource[j].end,
421 (unsigned long long)pci_resource_len(pdev, j));
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800422 }
423
424 if (!addr) {
425 ipath_dev_err(dd, "No valid address in BAR 0!\n");
426 ret = -ENODEV;
427 goto bail_regions;
428 }
429
430 dd->ipath_deviceid = ent->device; /* save for later use */
431 dd->ipath_vendorid = ent->vendor;
432
433 ret = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
434 if (ret) {
435 ipath_dev_err(dd, "Failed to read PCI revision ID unit "
436 "%u: err %d\n", dd->ipath_unit, -ret);
437 goto bail_regions; /* shouldn't ever happen */
438 }
439 dd->ipath_pcirev = rev;
440
Bryan O'Sullivaneb9dc6f2006-08-25 11:24:26 -0700441#if defined(__powerpc__)
442 /* There isn't a generic way to specify writethrough mappings */
443 dd->ipath_kregbase = __ioremap(addr, len,
444 (_PAGE_NO_CACHE|_PAGE_WRITETHRU));
445#else
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800446 dd->ipath_kregbase = ioremap_nocache(addr, len);
Bryan O'Sullivaneb9dc6f2006-08-25 11:24:26 -0700447#endif
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800448
449 if (!dd->ipath_kregbase) {
450 ipath_dbg("Unable to map io addr %llx to kvirt, failing\n",
451 addr);
452 ret = -ENOMEM;
453 goto bail_iounmap;
454 }
455 dd->ipath_kregend = (u64 __iomem *)
456 ((void __iomem *)dd->ipath_kregbase + len);
457 dd->ipath_physaddr = addr; /* used for io_remap, etc. */
458 /* for user mmap */
Bryan O'Sullivanb35f0042006-07-01 04:35:59 -0700459 ipath_cdbg(VERBOSE, "mapped io addr %llx to kregbase %p\n",
460 addr, dd->ipath_kregbase);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800461
462 /*
463 * clear ipath_flags here instead of in ipath_init_chip as it is set
464 * by ipath_setup_htconfig.
465 */
466 dd->ipath_flags = 0;
Bryan O'Sullivanfba75202006-07-01 04:36:09 -0700467 dd->ipath_lli_counter = 0;
468 dd->ipath_lli_errors = 0;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800469
470 if (dd->ipath_f_bus(dd, pdev))
471 ipath_dev_err(dd, "Failed to setup config space; "
472 "continuing anyway\n");
473
474 /*
Thomas Gleixnerdace1452006-07-01 19:29:38 -0700475 * set up our interrupt handler; IRQF_SHARED probably not needed,
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800476 * since MSI interrupts shouldn't be shared but won't hurt for now.
477 * check 0 irq after we return from chip-specific bus setup, since
478 * that can affect this due to setup
479 */
480 if (!pdev->irq)
481 ipath_dev_err(dd, "irq is 0, BIOS error? Interrupts won't "
482 "work\n");
483 else {
Thomas Gleixnerdace1452006-07-01 19:29:38 -0700484 ret = request_irq(pdev->irq, ipath_intr, IRQF_SHARED,
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800485 IPATH_DRV_NAME, dd);
486 if (ret) {
487 ipath_dev_err(dd, "Couldn't setup irq handler, "
488 "irq=%u: %d\n", pdev->irq, ret);
489 goto bail_iounmap;
490 }
491 }
492
493 ret = ipath_init_chip(dd, 0); /* do the chip-specific init */
494 if (ret)
495 goto bail_iounmap;
496
497 ret = ipath_enable_wc(dd);
498
499 if (ret) {
500 ipath_dev_err(dd, "Write combining not enabled "
501 "(err %d): performance may be poor\n",
502 -ret);
503 ret = 0;
504 }
505
506 ipath_device_create_group(&pdev->dev, dd);
507 ipathfs_add_device(dd);
508 ipath_user_add(dd);
Bryan O'Sullivana2acb2f2006-07-01 04:35:52 -0700509 ipath_diag_add(dd);
Bryan O'Sullivanb1c1b6a2006-08-25 11:24:31 -0700510 ipath_register_ib_device(dd);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800511
512 goto bail;
513
514bail_iounmap:
515 iounmap((volatile void __iomem *) dd->ipath_kregbase);
516
517bail_regions:
518 pci_release_regions(pdev);
519
520bail_disable:
521 pci_disable_device(pdev);
522
523bail_devdata:
524 ipath_free_devdata(pdev, dd);
525
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800526bail:
527 return ret;
528}
529
530static void __devexit ipath_remove_one(struct pci_dev *pdev)
531{
532 struct ipath_devdata *dd;
533
534 ipath_cdbg(VERBOSE, "removing, pdev=%p\n", pdev);
535 if (!pdev)
536 return;
537
538 dd = pci_get_drvdata(pdev);
Bryan O'Sullivanb1c1b6a2006-08-25 11:24:31 -0700539 ipath_unregister_ib_device(dd->verbs_dev);
Bryan O'Sullivana2acb2f2006-07-01 04:35:52 -0700540 ipath_diag_remove(dd);
541 ipath_user_remove(dd);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800542 ipathfs_remove_device(dd);
543 ipath_device_remove_group(&pdev->dev, dd);
544 ipath_cdbg(VERBOSE, "Releasing pci memory regions, dd %p, "
545 "unit %u\n", dd, (u32) dd->ipath_unit);
546 if (dd->ipath_kregbase) {
547 ipath_cdbg(VERBOSE, "Unmapping kregbase %p\n",
548 dd->ipath_kregbase);
549 iounmap((volatile void __iomem *) dd->ipath_kregbase);
550 dd->ipath_kregbase = NULL;
551 }
552 pci_release_regions(pdev);
553 ipath_cdbg(VERBOSE, "calling pci_disable_device\n");
554 pci_disable_device(pdev);
555
556 ipath_free_devdata(pdev, dd);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800557}
558
559/* general driver use */
560DEFINE_MUTEX(ipath_mutex);
561
562static DEFINE_SPINLOCK(ipath_pioavail_lock);
563
564/**
565 * ipath_disarm_piobufs - cancel a range of PIO buffers
566 * @dd: the infinipath device
567 * @first: the first PIO buffer to cancel
568 * @cnt: the number of PIO buffers to cancel
569 *
570 * cancel a range of PIO buffers, used when they might be armed, but
571 * not triggered. Used at init to ensure buffer state, and also user
572 * process close, in case it died while writing to a PIO buffer
573 * Also after errors.
574 */
575void ipath_disarm_piobufs(struct ipath_devdata *dd, unsigned first,
576 unsigned cnt)
577{
578 unsigned i, last = first + cnt;
579 u64 sendctrl, sendorig;
580
581 ipath_cdbg(PKT, "disarm %u PIObufs first=%u\n", cnt, first);
582 sendorig = dd->ipath_sendctrl | INFINIPATH_S_DISARM;
583 for (i = first; i < last; i++) {
584 sendctrl = sendorig |
585 (i << INFINIPATH_S_DISARMPIOBUF_SHIFT);
586 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
587 sendctrl);
588 }
589
590 /*
591 * Write it again with current value, in case ipath_sendctrl changed
592 * while we were looping; no critical bits that would require
593 * locking.
594 *
595 * Write a 0, and then the original value, reading scratch in
596 * between. This seems to avoid a chip timing race that causes
597 * pioavail updates to memory to stop.
598 */
599 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
600 0);
601 sendorig = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
602 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
603 dd->ipath_sendctrl);
604}
605
606/**
607 * ipath_wait_linkstate - wait for an IB link state change to occur
608 * @dd: the infinipath device
609 * @state: the state to wait for
610 * @msecs: the number of milliseconds to wait
611 *
612 * wait up to msecs milliseconds for IB link state change to occur for
613 * now, take the easy polling route. Currently used only by
Bryan O'Sullivan34b2aaf2006-08-25 11:24:32 -0700614 * ipath_set_linkstate. Returns 0 if state reached, otherwise
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800615 * -ETIMEDOUT state can have multiple states set, for any of several
616 * transitions.
617 */
Bryan O'Sullivan34b2aaf2006-08-25 11:24:32 -0700618static int ipath_wait_linkstate(struct ipath_devdata *dd, u32 state,
619 int msecs)
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800620{
Bryan O'Sullivan0fd41362006-08-25 11:24:34 -0700621 dd->ipath_state_wanted = state;
622 wait_event_interruptible_timeout(ipath_state_wait,
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800623 (dd->ipath_flags & state),
624 msecs_to_jiffies(msecs));
Bryan O'Sullivan0fd41362006-08-25 11:24:34 -0700625 dd->ipath_state_wanted = 0;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800626
627 if (!(dd->ipath_flags & state)) {
628 u64 val;
Bryan O'Sullivan0fd41362006-08-25 11:24:34 -0700629 ipath_cdbg(VERBOSE, "Didn't reach linkstate %s within %u"
630 " ms\n",
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800631 /* test INIT ahead of DOWN, both can be set */
632 (state & IPATH_LINKINIT) ? "INIT" :
633 ((state & IPATH_LINKDOWN) ? "DOWN" :
634 ((state & IPATH_LINKARMED) ? "ARM" : "ACTIVE")),
635 msecs);
636 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus);
637 ipath_cdbg(VERBOSE, "ibcc=%llx ibcstatus=%llx (%s)\n",
638 (unsigned long long) ipath_read_kreg64(
639 dd, dd->ipath_kregs->kr_ibcctrl),
640 (unsigned long long) val,
641 ipath_ibcstatus_str[val & 0xf]);
642 }
643 return (dd->ipath_flags & state) ? 0 : -ETIMEDOUT;
644}
645
646void ipath_decode_err(char *buf, size_t blen, ipath_err_t err)
647{
648 *buf = '\0';
649 if (err & INFINIPATH_E_RHDRLEN)
650 strlcat(buf, "rhdrlen ", blen);
651 if (err & INFINIPATH_E_RBADTID)
652 strlcat(buf, "rbadtid ", blen);
653 if (err & INFINIPATH_E_RBADVERSION)
654 strlcat(buf, "rbadversion ", blen);
655 if (err & INFINIPATH_E_RHDR)
656 strlcat(buf, "rhdr ", blen);
657 if (err & INFINIPATH_E_RLONGPKTLEN)
658 strlcat(buf, "rlongpktlen ", blen);
659 if (err & INFINIPATH_E_RSHORTPKTLEN)
660 strlcat(buf, "rshortpktlen ", blen);
661 if (err & INFINIPATH_E_RMAXPKTLEN)
662 strlcat(buf, "rmaxpktlen ", blen);
663 if (err & INFINIPATH_E_RMINPKTLEN)
664 strlcat(buf, "rminpktlen ", blen);
665 if (err & INFINIPATH_E_RFORMATERR)
666 strlcat(buf, "rformaterr ", blen);
667 if (err & INFINIPATH_E_RUNSUPVL)
668 strlcat(buf, "runsupvl ", blen);
669 if (err & INFINIPATH_E_RUNEXPCHAR)
670 strlcat(buf, "runexpchar ", blen);
671 if (err & INFINIPATH_E_RIBFLOW)
672 strlcat(buf, "ribflow ", blen);
673 if (err & INFINIPATH_E_REBP)
674 strlcat(buf, "EBP ", blen);
675 if (err & INFINIPATH_E_SUNDERRUN)
676 strlcat(buf, "sunderrun ", blen);
677 if (err & INFINIPATH_E_SPIOARMLAUNCH)
678 strlcat(buf, "spioarmlaunch ", blen);
679 if (err & INFINIPATH_E_SUNEXPERRPKTNUM)
680 strlcat(buf, "sunexperrpktnum ", blen);
681 if (err & INFINIPATH_E_SDROPPEDDATAPKT)
682 strlcat(buf, "sdroppeddatapkt ", blen);
683 if (err & INFINIPATH_E_SDROPPEDSMPPKT)
684 strlcat(buf, "sdroppedsmppkt ", blen);
685 if (err & INFINIPATH_E_SMAXPKTLEN)
686 strlcat(buf, "smaxpktlen ", blen);
687 if (err & INFINIPATH_E_SMINPKTLEN)
688 strlcat(buf, "sminpktlen ", blen);
689 if (err & INFINIPATH_E_SUNSUPVL)
690 strlcat(buf, "sunsupVL ", blen);
691 if (err & INFINIPATH_E_SPKTLEN)
692 strlcat(buf, "spktlen ", blen);
693 if (err & INFINIPATH_E_INVALIDADDR)
694 strlcat(buf, "invalidaddr ", blen);
695 if (err & INFINIPATH_E_RICRC)
696 strlcat(buf, "CRC ", blen);
697 if (err & INFINIPATH_E_RVCRC)
698 strlcat(buf, "VCRC ", blen);
699 if (err & INFINIPATH_E_RRCVEGRFULL)
700 strlcat(buf, "rcvegrfull ", blen);
701 if (err & INFINIPATH_E_RRCVHDRFULL)
702 strlcat(buf, "rcvhdrfull ", blen);
703 if (err & INFINIPATH_E_IBSTATUSCHANGED)
704 strlcat(buf, "ibcstatuschg ", blen);
705 if (err & INFINIPATH_E_RIBLOSTLINK)
706 strlcat(buf, "riblostlink ", blen);
707 if (err & INFINIPATH_E_HARDWARE)
708 strlcat(buf, "hardware ", blen);
709 if (err & INFINIPATH_E_RESET)
710 strlcat(buf, "reset ", blen);
711}
712
713/**
714 * get_rhf_errstring - decode RHF errors
715 * @err: the err number
716 * @msg: the output buffer
717 * @len: the length of the output buffer
718 *
719 * only used one place now, may want more later
720 */
721static void get_rhf_errstring(u32 err, char *msg, size_t len)
722{
723 /* if no errors, and so don't need to check what's first */
724 *msg = '\0';
725
726 if (err & INFINIPATH_RHF_H_ICRCERR)
727 strlcat(msg, "icrcerr ", len);
728 if (err & INFINIPATH_RHF_H_VCRCERR)
729 strlcat(msg, "vcrcerr ", len);
730 if (err & INFINIPATH_RHF_H_PARITYERR)
731 strlcat(msg, "parityerr ", len);
732 if (err & INFINIPATH_RHF_H_LENERR)
733 strlcat(msg, "lenerr ", len);
734 if (err & INFINIPATH_RHF_H_MTUERR)
735 strlcat(msg, "mtuerr ", len);
736 if (err & INFINIPATH_RHF_H_IHDRERR)
737 /* infinipath hdr checksum error */
738 strlcat(msg, "ipathhdrerr ", len);
739 if (err & INFINIPATH_RHF_H_TIDERR)
740 strlcat(msg, "tiderr ", len);
741 if (err & INFINIPATH_RHF_H_MKERR)
742 /* bad port, offset, etc. */
743 strlcat(msg, "invalid ipathhdr ", len);
744 if (err & INFINIPATH_RHF_H_IBERR)
745 strlcat(msg, "iberr ", len);
746 if (err & INFINIPATH_RHF_L_SWA)
747 strlcat(msg, "swA ", len);
748 if (err & INFINIPATH_RHF_L_SWB)
749 strlcat(msg, "swB ", len);
750}
751
752/**
753 * ipath_get_egrbuf - get an eager buffer
754 * @dd: the infinipath device
755 * @bufnum: the eager buffer to get
756 * @err: unused
757 *
758 * must only be called if ipath_pd[port] is known to be allocated
759 */
760static inline void *ipath_get_egrbuf(struct ipath_devdata *dd, u32 bufnum,
761 int err)
762{
763 return dd->ipath_port0_skbs ?
764 (void *)dd->ipath_port0_skbs[bufnum]->data : NULL;
765}
766
767/**
768 * ipath_alloc_skb - allocate an skb and buffer with possible constraints
769 * @dd: the infinipath device
770 * @gfp_mask: the sk_buff SFP mask
771 */
772struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd,
773 gfp_t gfp_mask)
774{
775 struct sk_buff *skb;
776 u32 len;
777
778 /*
779 * Only fully supported way to handle this is to allocate lots
780 * extra, align as needed, and then do skb_reserve(). That wastes
781 * a lot of memory... I'll have to hack this into infinipath_copy
782 * also.
783 */
784
785 /*
786 * We need 4 extra bytes for unaligned transfer copying
787 */
788 if (dd->ipath_flags & IPATH_4BYTE_TID) {
789 /* we need a 4KB multiple alignment, and there is no way
790 * to do it except to allocate extra and then skb_reserve
791 * enough to bring it up to the right alignment.
792 */
793 len = dd->ipath_ibmaxlen + 4 + (1 << 11) - 1;
794 }
795 else
796 len = dd->ipath_ibmaxlen + 4;
797 skb = __dev_alloc_skb(len, gfp_mask);
798 if (!skb) {
799 ipath_dev_err(dd, "Failed to allocate skbuff, length %u\n",
800 len);
801 goto bail;
802 }
803 if (dd->ipath_flags & IPATH_4BYTE_TID) {
804 u32 una = ((1 << 11) - 1) & (unsigned long)(skb->data + 4);
805 if (una)
806 skb_reserve(skb, 4 + (1 << 11) - una);
807 else
808 skb_reserve(skb, 4);
809 } else
810 skb_reserve(skb, 4);
811
812bail:
813 return skb;
814}
815
Ralph Campbell3d37b9e2006-07-17 18:18:36 -0700816static void ipath_rcv_hdrerr(struct ipath_devdata *dd,
817 u32 eflags,
818 u32 l,
819 u32 etail,
820 u64 *rc)
821{
822 char emsg[128];
823 struct ipath_message_header *hdr;
824
825 get_rhf_errstring(eflags, emsg, sizeof emsg);
826 hdr = (struct ipath_message_header *)&rc[1];
827 ipath_cdbg(PKT, "RHFerrs %x hdrqtail=%x typ=%u "
828 "tlen=%x opcode=%x egridx=%x: %s\n",
829 eflags, l,
830 ipath_hdrget_rcv_type((__le32 *) rc),
831 ipath_hdrget_length_in_bytes((__le32 *) rc),
832 be32_to_cpu(hdr->bth[0]) >> 24,
833 etail, emsg);
834
835 /* Count local link integrity errors. */
836 if (eflags & (INFINIPATH_RHF_H_ICRCERR | INFINIPATH_RHF_H_VCRCERR)) {
837 u8 n = (dd->ipath_ibcctrl >>
838 INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
839 INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
840
841 if (++dd->ipath_lli_counter > n) {
842 dd->ipath_lli_counter = 0;
843 dd->ipath_lli_errors++;
844 }
845 }
846}
847
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800848/*
849 * ipath_kreceive - receive a packet
850 * @dd: the infinipath device
851 *
852 * called from interrupt handler for errors or receive interrupt
853 */
854void ipath_kreceive(struct ipath_devdata *dd)
855{
856 u64 *rc;
857 void *ebuf;
858 const u32 rsize = dd->ipath_rcvhdrentsize; /* words */
859 const u32 maxcnt = dd->ipath_rcvhdrcnt * rsize; /* words */
860 u32 etail = -1, l, hdrqtail;
Bryan O'Sullivan27b678d2006-07-01 04:36:17 -0700861 struct ipath_message_header *hdr;
Bryan O'Sullivan57abad22006-07-01 04:36:05 -0700862 u32 eflags, i, etype, tlen, pkttot = 0, updegr=0, reloop=0;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800863 static u64 totcalls; /* stats, may eventually remove */
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800864
865 if (!dd->ipath_hdrqtailptr) {
866 ipath_dev_err(dd,
867 "hdrqtailptr not set, can't do receives\n");
868 goto bail;
869 }
870
871 /* There is already a thread processing this queue. */
872 if (test_and_set_bit(0, &dd->ipath_rcv_pending))
873 goto bail;
874
Bryan O'Sullivanf5f99922006-07-01 04:36:05 -0700875 l = dd->ipath_port0head;
Bryan O'Sullivan57abad22006-07-01 04:36:05 -0700876 hdrqtail = (u32) le64_to_cpu(*dd->ipath_hdrqtailptr);
877 if (l == hdrqtail)
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800878 goto done;
879
Bryan O'Sullivan57abad22006-07-01 04:36:05 -0700880reloop:
Bryan O'Sullivanf5f99922006-07-01 04:36:05 -0700881 for (i = 0; l != hdrqtail; i++) {
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800882 u32 qp;
883 u8 *bthbytes;
884
885 rc = (u64 *) (dd->ipath_pd[0]->port_rcvhdrq + (l << 2));
Bryan O'Sullivan27b678d2006-07-01 04:36:17 -0700886 hdr = (struct ipath_message_header *)&rc[1];
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800887 /*
888 * could make a network order version of IPATH_KD_QP, and
889 * do the obvious shift before masking to speed this up.
890 */
891 qp = ntohl(hdr->bth[1]) & 0xffffff;
892 bthbytes = (u8 *) hdr->bth;
893
Bryan O'Sullivan27b678d2006-07-01 04:36:17 -0700894 eflags = ipath_hdrget_err_flags((__le32 *) rc);
895 etype = ipath_hdrget_rcv_type((__le32 *) rc);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800896 /* total length */
Bryan O'Sullivan27b678d2006-07-01 04:36:17 -0700897 tlen = ipath_hdrget_length_in_bytes((__le32 *) rc);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800898 ebuf = NULL;
899 if (etype != RCVHQ_RCV_TYPE_EXPECTED) {
900 /*
901 * it turns out that the chips uses an eager buffer
902 * for all non-expected packets, whether it "needs"
903 * one or not. So always get the index, but don't
904 * set ebuf (so we try to copy data) unless the
905 * length requires it.
906 */
Bryan O'Sullivan27b678d2006-07-01 04:36:17 -0700907 etail = ipath_hdrget_index((__le32 *) rc);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800908 if (tlen > sizeof(*hdr) ||
909 etype == RCVHQ_RCV_TYPE_NON_KD)
910 ebuf = ipath_get_egrbuf(dd, etail, 0);
911 }
912
913 /*
914 * both tiderr and ipathhdrerr are set for all plain IB
915 * packets; only ipathhdrerr should be set.
916 */
917
918 if (etype != RCVHQ_RCV_TYPE_NON_KD && etype !=
Bryan O'Sullivan27b678d2006-07-01 04:36:17 -0700919 RCVHQ_RCV_TYPE_ERROR && ipath_hdrget_ipath_ver(
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800920 hdr->iph.ver_port_tid_offset) !=
921 IPS_PROTO_VERSION) {
922 ipath_cdbg(PKT, "Bad InfiniPath protocol version "
923 "%x\n", etype);
924 }
925
Ralph Campbell3d37b9e2006-07-17 18:18:36 -0700926 if (unlikely(eflags))
927 ipath_rcv_hdrerr(dd, eflags, l, etail, rc);
928 else if (etype == RCVHQ_RCV_TYPE_NON_KD) {
Bryan O'Sullivan34b2aaf2006-08-25 11:24:32 -0700929 ipath_ib_rcv(dd->verbs_dev, rc + 1, ebuf, tlen);
930 if (dd->ipath_lli_counter)
931 dd->ipath_lli_counter--;
932 ipath_cdbg(PKT, "typ %x, opcode %x (eager, "
933 "qp=%x), len %x; ignored\n",
934 etype, bthbytes[0], qp, tlen);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800935 }
Bryan O'Sullivan34b2aaf2006-08-25 11:24:32 -0700936 else if (etype == RCVHQ_RCV_TYPE_EAGER)
937 ipath_cdbg(PKT, "typ %x, opcode %x (eager, "
938 "qp=%x), len %x; ignored\n",
939 etype, bthbytes[0], qp, tlen);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800940 else if (etype == RCVHQ_RCV_TYPE_EXPECTED)
941 ipath_dbg("Bug: Expected TID, opcode %x; ignored\n",
942 be32_to_cpu(hdr->bth[0]) & 0xff);
Ralph Campbell3d37b9e2006-07-17 18:18:36 -0700943 else {
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800944 /*
945 * error packet, type of error unknown.
946 * Probably type 3, but we don't know, so don't
947 * even try to print the opcode, etc.
948 */
949 ipath_dbg("Error Pkt, but no eflags! egrbuf %x, "
950 "len %x\nhdrq@%lx;hdrq+%x rhf: %llx; "
951 "hdr %llx %llx %llx %llx %llx\n",
952 etail, tlen, (unsigned long) rc, l,
953 (unsigned long long) rc[0],
954 (unsigned long long) rc[1],
955 (unsigned long long) rc[2],
956 (unsigned long long) rc[3],
957 (unsigned long long) rc[4],
958 (unsigned long long) rc[5]);
959 }
960 l += rsize;
961 if (l >= maxcnt)
962 l = 0;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800963 if (etype != RCVHQ_RCV_TYPE_EXPECTED)
Bryan O'Sullivanf5f99922006-07-01 04:36:05 -0700964 updegr = 1;
965 /*
966 * update head regs on last packet, and every 16 packets.
967 * Reduce bus traffic, while still trying to prevent
968 * rcvhdrq overflows, for when the queue is nearly full
969 */
970 if (l == hdrqtail || (i && !(i&0xf))) {
971 u64 lval;
Bryan O'Sullivan525d0ca2006-08-25 11:24:39 -0700972 if (l == hdrqtail)
973 /* request IBA6120 interrupt only on last */
Bryan O'Sullivanf5f99922006-07-01 04:36:05 -0700974 lval = dd->ipath_rhdrhead_intr_off | l;
975 else
976 lval = l;
977 (void)ipath_write_ureg(dd, ur_rcvhdrhead, lval, 0);
978 if (updegr) {
979 (void)ipath_write_ureg(dd, ur_rcvegrindexhead,
980 etail, 0);
981 updegr = 0;
982 }
983 }
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -0800984 }
985
Bryan O'Sullivan57abad22006-07-01 04:36:05 -0700986 if (!dd->ipath_rhdrhead_intr_off && !reloop) {
Bryan O'Sullivan525d0ca2006-08-25 11:24:39 -0700987 /* IBA6110 workaround; we can have a race clearing chip
Bryan O'Sullivan57abad22006-07-01 04:36:05 -0700988 * interrupt with another interrupt about to be delivered,
989 * and can clear it before it is delivered on the GPIO
990 * workaround. By doing the extra check here for the
991 * in-memory tail register updating while we were doing
992 * earlier packets, we "almost" guarantee we have covered
993 * that case.
994 */
995 u32 hqtail = (u32)le64_to_cpu(*dd->ipath_hdrqtailptr);
996 if (hqtail != hdrqtail) {
997 hdrqtail = hqtail;
998 reloop = 1; /* loop 1 extra time at most */
999 goto reloop;
1000 }
1001 }
1002
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001003 pkttot += i;
1004
1005 dd->ipath_port0head = l;
1006
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001007 if (pkttot > ipath_stats.sps_maxpkts_call)
1008 ipath_stats.sps_maxpkts_call = pkttot;
1009 ipath_stats.sps_port0pkts += pkttot;
1010 ipath_stats.sps_avgpkts_call =
1011 ipath_stats.sps_port0pkts / ++totcalls;
1012
1013done:
1014 clear_bit(0, &dd->ipath_rcv_pending);
1015 smp_mb__after_clear_bit();
1016
1017bail:;
1018}
1019
1020/**
1021 * ipath_update_pio_bufs - update shadow copy of the PIO availability map
1022 * @dd: the infinipath device
1023 *
1024 * called whenever our local copy indicates we have run out of send buffers
1025 * NOTE: This can be called from interrupt context by some code
1026 * and from non-interrupt context by ipath_getpiobuf().
1027 */
1028
1029static void ipath_update_pio_bufs(struct ipath_devdata *dd)
1030{
1031 unsigned long flags;
1032 int i;
1033 const unsigned piobregs = (unsigned)dd->ipath_pioavregs;
1034
1035 /* If the generation (check) bits have changed, then we update the
1036 * busy bit for the corresponding PIO buffer. This algorithm will
1037 * modify positions to the value they already have in some cases
1038 * (i.e., no change), but it's faster than changing only the bits
1039 * that have changed.
1040 *
1041 * We would like to do this atomicly, to avoid spinlocks in the
1042 * critical send path, but that's not really possible, given the
1043 * type of changes, and that this routine could be called on
1044 * multiple cpu's simultaneously, so we lock in this routine only,
1045 * to avoid conflicting updates; all we change is the shadow, and
1046 * it's a single 64 bit memory location, so by definition the update
1047 * is atomic in terms of what other cpu's can see in testing the
1048 * bits. The spin_lock overhead isn't too bad, since it only
1049 * happens when all buffers are in use, so only cpu overhead, not
1050 * latency or bandwidth is affected.
1051 */
1052#define _IPATH_ALL_CHECKBITS 0x5555555555555555ULL
1053 if (!dd->ipath_pioavailregs_dma) {
1054 ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n");
1055 return;
1056 }
1057 if (ipath_debug & __IPATH_VERBDBG) {
1058 /* only if packet debug and verbose */
1059 volatile __le64 *dma = dd->ipath_pioavailregs_dma;
1060 unsigned long *shadow = dd->ipath_pioavailshadow;
1061
1062 ipath_cdbg(PKT, "Refill avail, dma0=%llx shad0=%lx, "
1063 "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx "
1064 "s3=%lx\n",
1065 (unsigned long long) le64_to_cpu(dma[0]),
1066 shadow[0],
1067 (unsigned long long) le64_to_cpu(dma[1]),
1068 shadow[1],
1069 (unsigned long long) le64_to_cpu(dma[2]),
1070 shadow[2],
1071 (unsigned long long) le64_to_cpu(dma[3]),
1072 shadow[3]);
1073 if (piobregs > 4)
1074 ipath_cdbg(
1075 PKT, "2nd group, dma4=%llx shad4=%lx, "
1076 "d5=%llx s5=%lx, d6=%llx s6=%lx, "
1077 "d7=%llx s7=%lx\n",
1078 (unsigned long long) le64_to_cpu(dma[4]),
1079 shadow[4],
1080 (unsigned long long) le64_to_cpu(dma[5]),
1081 shadow[5],
1082 (unsigned long long) le64_to_cpu(dma[6]),
1083 shadow[6],
1084 (unsigned long long) le64_to_cpu(dma[7]),
1085 shadow[7]);
1086 }
1087 spin_lock_irqsave(&ipath_pioavail_lock, flags);
1088 for (i = 0; i < piobregs; i++) {
1089 u64 pchbusy, pchg, piov, pnew;
1090 /*
1091 * Chip Errata: bug 6641; even and odd qwords>3 are swapped
1092 */
1093 if (i > 3) {
1094 if (i & 1)
1095 piov = le64_to_cpu(
1096 dd->ipath_pioavailregs_dma[i - 1]);
1097 else
1098 piov = le64_to_cpu(
1099 dd->ipath_pioavailregs_dma[i + 1]);
1100 } else
1101 piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i]);
1102 pchg = _IPATH_ALL_CHECKBITS &
1103 ~(dd->ipath_pioavailshadow[i] ^ piov);
1104 pchbusy = pchg << INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT;
1105 if (pchg && (pchbusy & dd->ipath_pioavailshadow[i])) {
1106 pnew = dd->ipath_pioavailshadow[i] & ~pchbusy;
1107 pnew |= piov & pchbusy;
1108 dd->ipath_pioavailshadow[i] = pnew;
1109 }
1110 }
1111 spin_unlock_irqrestore(&ipath_pioavail_lock, flags);
1112}
1113
1114/**
1115 * ipath_setrcvhdrsize - set the receive header size
1116 * @dd: the infinipath device
1117 * @rhdrsize: the receive header size
1118 *
1119 * called from user init code, and also layered driver init
1120 */
1121int ipath_setrcvhdrsize(struct ipath_devdata *dd, unsigned rhdrsize)
1122{
1123 int ret = 0;
1124
1125 if (dd->ipath_flags & IPATH_RCVHDRSZ_SET) {
1126 if (dd->ipath_rcvhdrsize != rhdrsize) {
1127 dev_info(&dd->pcidev->dev,
1128 "Error: can't set protocol header "
1129 "size %u, already %u\n",
1130 rhdrsize, dd->ipath_rcvhdrsize);
1131 ret = -EAGAIN;
1132 } else
1133 ipath_cdbg(VERBOSE, "Reuse same protocol header "
1134 "size %u\n", dd->ipath_rcvhdrsize);
1135 } else if (rhdrsize > (dd->ipath_rcvhdrentsize -
1136 (sizeof(u64) / sizeof(u32)))) {
1137 ipath_dbg("Error: can't set protocol header size %u "
1138 "(> max %u)\n", rhdrsize,
1139 dd->ipath_rcvhdrentsize -
1140 (u32) (sizeof(u64) / sizeof(u32)));
1141 ret = -EOVERFLOW;
1142 } else {
1143 dd->ipath_flags |= IPATH_RCVHDRSZ_SET;
1144 dd->ipath_rcvhdrsize = rhdrsize;
1145 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize,
1146 dd->ipath_rcvhdrsize);
1147 ipath_cdbg(VERBOSE, "Set protocol header size to %u\n",
1148 dd->ipath_rcvhdrsize);
1149 }
1150 return ret;
1151}
1152
1153/**
1154 * ipath_getpiobuf - find an available pio buffer
1155 * @dd: the infinipath device
1156 * @pbufnum: the buffer number is placed here
1157 *
1158 * do appropriate marking as busy, etc.
1159 * returns buffer number if one found (>=0), negative number is error.
Bryan O'Sullivan0fd41362006-08-25 11:24:34 -07001160 * Used by ipath_layer_send
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001161 */
1162u32 __iomem *ipath_getpiobuf(struct ipath_devdata *dd, u32 * pbufnum)
1163{
1164 int i, j, starti, updated = 0;
1165 unsigned piobcnt, iter;
1166 unsigned long flags;
1167 unsigned long *shadow = dd->ipath_pioavailshadow;
1168 u32 __iomem *buf;
1169
1170 piobcnt = (unsigned)(dd->ipath_piobcnt2k
1171 + dd->ipath_piobcnt4k);
1172 starti = dd->ipath_lastport_piobuf;
1173 iter = piobcnt - starti;
1174 if (dd->ipath_upd_pio_shadow) {
1175 /*
1176 * Minor optimization. If we had no buffers on last call,
1177 * start out by doing the update; continue and do scan even
1178 * if no buffers were updated, to be paranoid
1179 */
1180 ipath_update_pio_bufs(dd);
1181 /* we scanned here, don't do it at end of scan */
1182 updated = 1;
1183 i = starti;
1184 } else
1185 i = dd->ipath_lastpioindex;
1186
1187rescan:
1188 /*
1189 * while test_and_set_bit() is atomic, we do that and then the
1190 * change_bit(), and the pair is not. See if this is the cause
1191 * of the remaining armlaunch errors.
1192 */
1193 spin_lock_irqsave(&ipath_pioavail_lock, flags);
1194 for (j = 0; j < iter; j++, i++) {
1195 if (i >= piobcnt)
1196 i = starti;
1197 /*
1198 * To avoid bus lock overhead, we first find a candidate
1199 * buffer, then do the test and set, and continue if that
1200 * fails.
1201 */
1202 if (test_bit((2 * i) + 1, shadow) ||
1203 test_and_set_bit((2 * i) + 1, shadow))
1204 continue;
1205 /* flip generation bit */
1206 change_bit(2 * i, shadow);
1207 break;
1208 }
1209 spin_unlock_irqrestore(&ipath_pioavail_lock, flags);
1210
1211 if (j == iter) {
1212 volatile __le64 *dma = dd->ipath_pioavailregs_dma;
1213
1214 /*
1215 * first time through; shadow exhausted, but may be real
1216 * buffers available, so go see; if any updated, rescan
1217 * (once)
1218 */
1219 if (!updated) {
1220 ipath_update_pio_bufs(dd);
1221 updated = 1;
1222 i = starti;
1223 goto rescan;
1224 }
1225 dd->ipath_upd_pio_shadow = 1;
1226 /*
1227 * not atomic, but if we lose one once in a while, that's OK
1228 */
1229 ipath_stats.sps_nopiobufs++;
1230 if (!(++dd->ipath_consec_nopiobuf % 100000)) {
1231 ipath_dbg(
1232 "%u pio sends with no bufavail; dmacopy: "
1233 "%llx %llx %llx %llx; shadow: "
1234 "%lx %lx %lx %lx\n",
1235 dd->ipath_consec_nopiobuf,
1236 (unsigned long long) le64_to_cpu(dma[0]),
1237 (unsigned long long) le64_to_cpu(dma[1]),
1238 (unsigned long long) le64_to_cpu(dma[2]),
1239 (unsigned long long) le64_to_cpu(dma[3]),
1240 shadow[0], shadow[1], shadow[2],
1241 shadow[3]);
1242 /*
1243 * 4 buffers per byte, 4 registers above, cover rest
1244 * below
1245 */
1246 if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) >
1247 (sizeof(shadow[0]) * 4 * 4))
1248 ipath_dbg("2nd group: dmacopy: %llx %llx "
1249 "%llx %llx; shadow: %lx %lx "
1250 "%lx %lx\n",
1251 (unsigned long long)
1252 le64_to_cpu(dma[4]),
1253 (unsigned long long)
1254 le64_to_cpu(dma[5]),
1255 (unsigned long long)
1256 le64_to_cpu(dma[6]),
1257 (unsigned long long)
1258 le64_to_cpu(dma[7]),
1259 shadow[4], shadow[5],
1260 shadow[6], shadow[7]);
1261 }
1262 buf = NULL;
1263 goto bail;
1264 }
1265
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001266 /*
1267 * set next starting place. Since it's just an optimization,
1268 * it doesn't matter who wins on this, so no locking
1269 */
1270 dd->ipath_lastpioindex = i + 1;
1271 if (dd->ipath_upd_pio_shadow)
1272 dd->ipath_upd_pio_shadow = 0;
1273 if (dd->ipath_consec_nopiobuf)
1274 dd->ipath_consec_nopiobuf = 0;
1275 if (i < dd->ipath_piobcnt2k)
1276 buf = (u32 __iomem *) (dd->ipath_pio2kbase +
1277 i * dd->ipath_palign);
1278 else
1279 buf = (u32 __iomem *)
1280 (dd->ipath_pio4kbase +
1281 (i - dd->ipath_piobcnt2k) * dd->ipath_4kalign);
1282 ipath_cdbg(VERBOSE, "Return piobuf%u %uk @ %p\n",
1283 i, (i < dd->ipath_piobcnt2k) ? 2 : 4, buf);
1284 if (pbufnum)
1285 *pbufnum = i;
1286
1287bail:
1288 return buf;
1289}
1290
1291/**
1292 * ipath_create_rcvhdrq - create a receive header queue
1293 * @dd: the infinipath device
1294 * @pd: the port data
1295 *
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001296 * this must be contiguous memory (from an i/o perspective), and must be
1297 * DMA'able (which means for some systems, it will go through an IOMMU,
1298 * or be forced into a low address range).
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001299 */
1300int ipath_create_rcvhdrq(struct ipath_devdata *dd,
1301 struct ipath_portdata *pd)
1302{
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001303 int ret = 0;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001304
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001305 if (!pd->port_rcvhdrq) {
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001306 dma_addr_t phys_hdrqtail;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001307 gfp_t gfp_flags = GFP_USER | __GFP_COMP;
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001308 int amt = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize *
1309 sizeof(u32), PAGE_SIZE);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001310
1311 pd->port_rcvhdrq = dma_alloc_coherent(
1312 &dd->pcidev->dev, amt, &pd->port_rcvhdrq_phys,
1313 gfp_flags);
1314
1315 if (!pd->port_rcvhdrq) {
1316 ipath_dev_err(dd, "attempt to allocate %d bytes "
1317 "for port %u rcvhdrq failed\n",
1318 amt, pd->port_port);
1319 ret = -ENOMEM;
1320 goto bail;
1321 }
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001322 pd->port_rcvhdrtail_kvaddr = dma_alloc_coherent(
1323 &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail, GFP_KERNEL);
1324 if (!pd->port_rcvhdrtail_kvaddr) {
1325 ipath_dev_err(dd, "attempt to allocate 1 page "
1326 "for port %u rcvhdrqtailaddr failed\n",
1327 pd->port_port);
1328 ret = -ENOMEM;
1329 goto bail;
1330 }
1331 pd->port_rcvhdrqtailaddr_phys = phys_hdrqtail;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001332
1333 pd->port_rcvhdrq_size = amt;
1334
1335 ipath_cdbg(VERBOSE, "%d pages at %p (phys %lx) size=%lu "
1336 "for port %u rcvhdr Q\n",
1337 amt >> PAGE_SHIFT, pd->port_rcvhdrq,
1338 (unsigned long) pd->port_rcvhdrq_phys,
1339 (unsigned long) pd->port_rcvhdrq_size,
1340 pd->port_port);
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001341
1342 ipath_cdbg(VERBOSE, "port %d hdrtailaddr, %llx physical\n",
1343 pd->port_port,
1344 (unsigned long long) phys_hdrqtail);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001345 }
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001346 else
1347 ipath_cdbg(VERBOSE, "reuse port %d rcvhdrq @%p %llx phys; "
1348 "hdrtailaddr@%p %llx physical\n",
1349 pd->port_port, pd->port_rcvhdrq,
1350 pd->port_rcvhdrq_phys, pd->port_rcvhdrtail_kvaddr,
1351 (unsigned long long)pd->port_rcvhdrqtailaddr_phys);
1352
1353 /* clear for security and sanity on each use */
1354 memset(pd->port_rcvhdrq, 0, pd->port_rcvhdrq_size);
1355 memset((void *)pd->port_rcvhdrtail_kvaddr, 0, PAGE_SIZE);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001356
1357 /*
1358 * tell chip each time we init it, even if we are re-using previous
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001359 * memory (we zero the register at process close)
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001360 */
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001361 ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr,
1362 pd->port_port, pd->port_rcvhdrqtailaddr_phys);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001363 ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr,
1364 pd->port_port, pd->port_rcvhdrq_phys);
1365
1366 ret = 0;
1367bail:
1368 return ret;
1369}
1370
1371int ipath_waitfor_complete(struct ipath_devdata *dd, ipath_kreg reg_id,
1372 u64 bits_to_wait_for, u64 * valp)
1373{
1374 unsigned long timeout;
1375 u64 lastval, val;
1376 int ret;
1377
1378 lastval = ipath_read_kreg64(dd, reg_id);
1379 /* wait a ridiculously long time */
1380 timeout = jiffies + msecs_to_jiffies(5);
1381 do {
1382 val = ipath_read_kreg64(dd, reg_id);
1383 /* set so they have something, even on failures. */
1384 *valp = val;
1385 if ((val & bits_to_wait_for) == bits_to_wait_for) {
1386 ret = 0;
1387 break;
1388 }
1389 if (val != lastval)
1390 ipath_cdbg(VERBOSE, "Changed from %llx to %llx, "
1391 "waiting for %llx bits\n",
1392 (unsigned long long) lastval,
1393 (unsigned long long) val,
1394 (unsigned long long) bits_to_wait_for);
1395 cond_resched();
1396 if (time_after(jiffies, timeout)) {
1397 ipath_dbg("Didn't get bits %llx in register 0x%x, "
1398 "got %llx\n",
1399 (unsigned long long) bits_to_wait_for,
1400 reg_id, (unsigned long long) *valp);
1401 ret = -ENODEV;
1402 break;
1403 }
1404 } while (1);
1405
1406 return ret;
1407}
1408
1409/**
1410 * ipath_waitfor_mdio_cmdready - wait for last command to complete
1411 * @dd: the infinipath device
1412 *
1413 * Like ipath_waitfor_complete(), but we wait for the CMDVALID bit to go
1414 * away indicating the last command has completed. It doesn't return data
1415 */
1416int ipath_waitfor_mdio_cmdready(struct ipath_devdata *dd)
1417{
1418 unsigned long timeout;
1419 u64 val;
1420 int ret;
1421
1422 /* wait a ridiculously long time */
1423 timeout = jiffies + msecs_to_jiffies(5);
1424 do {
1425 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_mdio);
1426 if (!(val & IPATH_MDIO_CMDVALID)) {
1427 ret = 0;
1428 break;
1429 }
1430 cond_resched();
1431 if (time_after(jiffies, timeout)) {
1432 ipath_dbg("CMDVALID stuck in mdio reg? (%llx)\n",
1433 (unsigned long long) val);
1434 ret = -ENODEV;
1435 break;
1436 }
1437 } while (1);
1438
1439 return ret;
1440}
1441
Bryan O'Sullivan34b2aaf2006-08-25 11:24:32 -07001442static void ipath_set_ib_lstate(struct ipath_devdata *dd, int which)
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001443{
1444 static const char *what[4] = {
1445 [0] = "DOWN",
1446 [INFINIPATH_IBCC_LINKCMD_INIT] = "INIT",
1447 [INFINIPATH_IBCC_LINKCMD_ARMED] = "ARMED",
1448 [INFINIPATH_IBCC_LINKCMD_ACTIVE] = "ACTIVE"
1449 };
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001450 int linkcmd = (which >> INFINIPATH_IBCC_LINKCMD_SHIFT) &
1451 INFINIPATH_IBCC_LINKCMD_MASK;
1452
Bryan O'Sullivan0fd41362006-08-25 11:24:34 -07001453 ipath_cdbg(VERBOSE, "Trying to move unit %u to %s, current ltstate "
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001454 "is %s\n", dd->ipath_unit,
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001455 what[linkcmd],
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001456 ipath_ibcstatus_str[
1457 (ipath_read_kreg64
1458 (dd, dd->ipath_kregs->kr_ibcstatus) >>
1459 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) &
1460 INFINIPATH_IBCS_LINKTRAININGSTATE_MASK]);
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001461 /* flush all queued sends when going to DOWN or INIT, to be sure that
Bryan O'Sullivan0fd41362006-08-25 11:24:34 -07001462 * they don't block MAD packets */
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001463 if (!linkcmd || linkcmd == INFINIPATH_IBCC_LINKCMD_INIT) {
1464 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
1465 INFINIPATH_S_ABORT);
1466 ipath_disarm_piobufs(dd, dd->ipath_lastport_piobuf,
1467 (unsigned)(dd->ipath_piobcnt2k +
1468 dd->ipath_piobcnt4k) -
1469 dd->ipath_lastport_piobuf);
1470 }
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001471
1472 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
1473 dd->ipath_ibcctrl | which);
1474}
1475
Bryan O'Sullivan34b2aaf2006-08-25 11:24:32 -07001476int ipath_set_linkstate(struct ipath_devdata *dd, u8 newstate)
1477{
1478 u32 lstate;
1479 int ret;
1480
1481 switch (newstate) {
1482 case IPATH_IB_LINKDOWN:
1483 ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_POLL <<
1484 INFINIPATH_IBCC_LINKINITCMD_SHIFT);
1485 /* don't wait */
1486 ret = 0;
1487 goto bail;
1488
1489 case IPATH_IB_LINKDOWN_SLEEP:
1490 ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_SLEEP <<
1491 INFINIPATH_IBCC_LINKINITCMD_SHIFT);
1492 /* don't wait */
1493 ret = 0;
1494 goto bail;
1495
1496 case IPATH_IB_LINKDOWN_DISABLE:
1497 ipath_set_ib_lstate(dd,
1498 INFINIPATH_IBCC_LINKINITCMD_DISABLE <<
1499 INFINIPATH_IBCC_LINKINITCMD_SHIFT);
1500 /* don't wait */
1501 ret = 0;
1502 goto bail;
1503
1504 case IPATH_IB_LINKINIT:
1505 if (dd->ipath_flags & IPATH_LINKINIT) {
1506 ret = 0;
1507 goto bail;
1508 }
1509 ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_INIT <<
1510 INFINIPATH_IBCC_LINKCMD_SHIFT);
1511 lstate = IPATH_LINKINIT;
1512 break;
1513
1514 case IPATH_IB_LINKARM:
1515 if (dd->ipath_flags & IPATH_LINKARMED) {
1516 ret = 0;
1517 goto bail;
1518 }
1519 if (!(dd->ipath_flags &
1520 (IPATH_LINKINIT | IPATH_LINKACTIVE))) {
1521 ret = -EINVAL;
1522 goto bail;
1523 }
1524 ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ARMED <<
1525 INFINIPATH_IBCC_LINKCMD_SHIFT);
1526 /*
1527 * Since the port can transition to ACTIVE by receiving
1528 * a non VL 15 packet, wait for either state.
1529 */
1530 lstate = IPATH_LINKARMED | IPATH_LINKACTIVE;
1531 break;
1532
1533 case IPATH_IB_LINKACTIVE:
1534 if (dd->ipath_flags & IPATH_LINKACTIVE) {
1535 ret = 0;
1536 goto bail;
1537 }
1538 if (!(dd->ipath_flags & IPATH_LINKARMED)) {
1539 ret = -EINVAL;
1540 goto bail;
1541 }
1542 ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ACTIVE <<
1543 INFINIPATH_IBCC_LINKCMD_SHIFT);
1544 lstate = IPATH_LINKACTIVE;
1545 break;
1546
1547 default:
1548 ipath_dbg("Invalid linkstate 0x%x requested\n", newstate);
1549 ret = -EINVAL;
1550 goto bail;
1551 }
1552 ret = ipath_wait_linkstate(dd, lstate, 2000);
1553
1554bail:
1555 return ret;
1556}
1557
1558/**
1559 * ipath_set_mtu - set the MTU
1560 * @dd: the infinipath device
1561 * @arg: the new MTU
1562 *
1563 * we can handle "any" incoming size, the issue here is whether we
1564 * need to restrict our outgoing size. For now, we don't do any
1565 * sanity checking on this, and we don't deal with what happens to
1566 * programs that are already running when the size changes.
1567 * NOTE: changing the MTU will usually cause the IBC to go back to
1568 * link initialize (IPATH_IBSTATE_INIT) state...
1569 */
1570int ipath_set_mtu(struct ipath_devdata *dd, u16 arg)
1571{
1572 u32 piosize;
1573 int changed = 0;
1574 int ret;
1575
1576 /*
1577 * mtu is IB data payload max. It's the largest power of 2 less
1578 * than piosize (or even larger, since it only really controls the
1579 * largest we can receive; we can send the max of the mtu and
1580 * piosize). We check that it's one of the valid IB sizes.
1581 */
1582 if (arg != 256 && arg != 512 && arg != 1024 && arg != 2048 &&
1583 arg != 4096) {
1584 ipath_dbg("Trying to set invalid mtu %u, failing\n", arg);
1585 ret = -EINVAL;
1586 goto bail;
1587 }
1588 if (dd->ipath_ibmtu == arg) {
1589 ret = 0; /* same as current */
1590 goto bail;
1591 }
1592
1593 piosize = dd->ipath_ibmaxlen;
1594 dd->ipath_ibmtu = arg;
1595
1596 if (arg >= (piosize - IPATH_PIO_MAXIBHDR)) {
1597 /* Only if it's not the initial value (or reset to it) */
1598 if (piosize != dd->ipath_init_ibmaxlen) {
1599 dd->ipath_ibmaxlen = piosize;
1600 changed = 1;
1601 }
1602 } else if ((arg + IPATH_PIO_MAXIBHDR) != dd->ipath_ibmaxlen) {
1603 piosize = arg + IPATH_PIO_MAXIBHDR;
1604 ipath_cdbg(VERBOSE, "ibmaxlen was 0x%x, setting to 0x%x "
1605 "(mtu 0x%x)\n", dd->ipath_ibmaxlen, piosize,
1606 arg);
1607 dd->ipath_ibmaxlen = piosize;
1608 changed = 1;
1609 }
1610
1611 if (changed) {
1612 /*
1613 * set the IBC maxpktlength to the size of our pio
1614 * buffers in words
1615 */
1616 u64 ibc = dd->ipath_ibcctrl;
1617 ibc &= ~(INFINIPATH_IBCC_MAXPKTLEN_MASK <<
1618 INFINIPATH_IBCC_MAXPKTLEN_SHIFT);
1619
1620 piosize = piosize - 2 * sizeof(u32); /* ignore pbc */
1621 dd->ipath_ibmaxlen = piosize;
1622 piosize /= sizeof(u32); /* in words */
1623 /*
1624 * for ICRC, which we only send in diag test pkt mode, and
1625 * we don't need to worry about that for mtu
1626 */
1627 piosize += 1;
1628
1629 ibc |= piosize << INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
1630 dd->ipath_ibcctrl = ibc;
1631 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
1632 dd->ipath_ibcctrl);
1633 dd->ipath_f_tidtemplate(dd);
1634 }
1635
1636 ret = 0;
1637
1638bail:
1639 return ret;
1640}
1641
1642int ipath_set_lid(struct ipath_devdata *dd, u32 arg, u8 lmc)
1643{
1644 dd->ipath_lid = arg;
1645 dd->ipath_lmc = lmc;
1646
1647 return 0;
1648}
1649
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001650/**
1651 * ipath_read_kreg64_port - read a device's per-port 64-bit kernel register
1652 * @dd: the infinipath device
1653 * @regno: the register number to read
1654 * @port: the port containing the register
1655 *
1656 * Registers that vary with the chip implementation constants (port)
1657 * use this routine.
1658 */
1659u64 ipath_read_kreg64_port(const struct ipath_devdata *dd, ipath_kreg regno,
1660 unsigned port)
1661{
1662 u16 where;
1663
1664 if (port < dd->ipath_portcnt &&
1665 (regno == dd->ipath_kregs->kr_rcvhdraddr ||
1666 regno == dd->ipath_kregs->kr_rcvhdrtailaddr))
1667 where = regno + port;
1668 else
1669 where = -1;
1670
1671 return ipath_read_kreg64(dd, where);
1672}
1673
1674/**
1675 * ipath_write_kreg_port - write a device's per-port 64-bit kernel register
1676 * @dd: the infinipath device
1677 * @regno: the register number to write
1678 * @port: the port containing the register
1679 * @value: the value to write
1680 *
1681 * Registers that vary with the chip implementation constants (port)
1682 * use this routine.
1683 */
1684void ipath_write_kreg_port(const struct ipath_devdata *dd, ipath_kreg regno,
1685 unsigned port, u64 value)
1686{
1687 u16 where;
1688
1689 if (port < dd->ipath_portcnt &&
1690 (regno == dd->ipath_kregs->kr_rcvhdraddr ||
1691 regno == dd->ipath_kregs->kr_rcvhdrtailaddr))
1692 where = regno + port;
1693 else
1694 where = -1;
1695
1696 ipath_write_kreg(dd, where, value);
1697}
1698
1699/**
1700 * ipath_shutdown_device - shut down a device
1701 * @dd: the infinipath device
1702 *
1703 * This is called to make the device quiet when we are about to
1704 * unload the driver, and also when the device is administratively
1705 * disabled. It does not free any data structures.
1706 * Everything it does has to be setup again by ipath_init_chip(dd,1)
1707 */
1708void ipath_shutdown_device(struct ipath_devdata *dd)
1709{
1710 u64 val;
1711
1712 ipath_dbg("Shutting down the device\n");
1713
1714 dd->ipath_flags |= IPATH_LINKUNK;
1715 dd->ipath_flags &= ~(IPATH_INITTED | IPATH_LINKDOWN |
1716 IPATH_LINKINIT | IPATH_LINKARMED |
1717 IPATH_LINKACTIVE);
1718 *dd->ipath_statusp &= ~(IPATH_STATUS_IB_CONF |
1719 IPATH_STATUS_IB_READY);
1720
1721 /* mask interrupts, but not errors */
1722 ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL);
1723
1724 dd->ipath_rcvctrl = 0;
1725 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1726 dd->ipath_rcvctrl);
1727
1728 /*
1729 * gracefully stop all sends allowing any in progress to trickle out
1730 * first.
1731 */
1732 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 0ULL);
1733 /* flush it */
1734 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
1735 /*
1736 * enough for anything that's going to trickle out to have actually
1737 * done so.
1738 */
1739 udelay(5);
1740
1741 /*
1742 * abort any armed or launched PIO buffers that didn't go. (self
1743 * clearing). Will cause any packet currently being transmitted to
1744 * go out with an EBP, and may also cause a short packet error on
1745 * the receiver.
1746 */
1747 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
1748 INFINIPATH_S_ABORT);
1749
1750 ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_DISABLE <<
1751 INFINIPATH_IBCC_LINKINITCMD_SHIFT);
1752
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001753 /* disable IBC */
1754 dd->ipath_control &= ~INFINIPATH_C_LINKENABLE;
1755 ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
Bryan O'Sullivana40f55f2006-07-01 04:36:00 -07001756 dd->ipath_control | INFINIPATH_C_FREEZEMODE);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001757
1758 /*
1759 * clear SerdesEnable and turn the leds off; do this here because
1760 * we are unloading, so don't count on interrupts to move along
1761 * Turn the LEDs off explictly for the same reason.
1762 */
1763 dd->ipath_f_quiet_serdes(dd);
1764 dd->ipath_f_setextled(dd, 0, 0);
1765
1766 if (dd->ipath_stats_timer_active) {
1767 del_timer_sync(&dd->ipath_stats_timer);
1768 dd->ipath_stats_timer_active = 0;
1769 }
1770
1771 /*
1772 * clear all interrupts and errors, so that the next time the driver
1773 * is loaded or device is enabled, we know that whatever is set
1774 * happened while we were unloaded
1775 */
1776 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
1777 ~0ULL & ~INFINIPATH_HWE_MEMBISTFAILED);
1778 ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL);
1779 ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL);
1780}
1781
1782/**
1783 * ipath_free_pddata - free a port's allocated data
1784 * @dd: the infinipath device
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001785 * @pd: the portdata structure
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001786 *
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001787 * free up any allocated data for a port
1788 * This should not touch anything that would affect a simultaneous
1789 * re-allocation of port data, because it is called after ipath_mutex
1790 * is released (and can be called from reinit as well).
1791 * It should never change any chip state, or global driver state.
1792 * (The only exception to global state is freeing the port0 port0_skbs.)
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001793 */
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001794void ipath_free_pddata(struct ipath_devdata *dd, struct ipath_portdata *pd)
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001795{
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001796 if (!pd)
1797 return;
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001798
1799 if (pd->port_rcvhdrq) {
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001800 ipath_cdbg(VERBOSE, "free closed port %d rcvhdrq @ %p "
1801 "(size=%lu)\n", pd->port_port, pd->port_rcvhdrq,
1802 (unsigned long) pd->port_rcvhdrq_size);
1803 dma_free_coherent(&dd->pcidev->dev, pd->port_rcvhdrq_size,
1804 pd->port_rcvhdrq, pd->port_rcvhdrq_phys);
1805 pd->port_rcvhdrq = NULL;
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001806 if (pd->port_rcvhdrtail_kvaddr) {
1807 dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
1808 (void *)pd->port_rcvhdrtail_kvaddr,
1809 pd->port_rcvhdrqtailaddr_phys);
1810 pd->port_rcvhdrtail_kvaddr = NULL;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001811 }
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001812 }
1813 if (pd->port_port && pd->port_rcvegrbuf) {
1814 unsigned e;
1815
1816 for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) {
1817 void *base = pd->port_rcvegrbuf[e];
1818 size_t size = pd->port_rcvegrbuf_size;
1819
1820 ipath_cdbg(VERBOSE, "egrbuf free(%p, %lu), "
1821 "chunk %u/%u\n", base,
1822 (unsigned long) size,
1823 e, pd->port_rcvegrbuf_chunks);
1824 dma_free_coherent(&dd->pcidev->dev, size,
1825 base, pd->port_rcvegrbuf_phys[e]);
1826 }
1827 vfree(pd->port_rcvegrbuf);
1828 pd->port_rcvegrbuf = NULL;
1829 vfree(pd->port_rcvegrbuf_phys);
1830 pd->port_rcvegrbuf_phys = NULL;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001831 pd->port_rcvegrbuf_chunks = 0;
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001832 } else if (pd->port_port == 0 && dd->ipath_port0_skbs) {
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001833 unsigned e;
1834 struct sk_buff **skbs = dd->ipath_port0_skbs;
1835
1836 dd->ipath_port0_skbs = NULL;
1837 ipath_cdbg(VERBOSE, "free closed port %d ipath_port0_skbs "
1838 "@ %p\n", pd->port_port, skbs);
1839 for (e = 0; e < dd->ipath_rcvegrcnt; e++)
1840 if (skbs[e])
1841 dev_kfree_skb(skbs[e]);
1842 vfree(skbs);
1843 }
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001844 kfree(pd->port_tid_pg_list);
1845 kfree(pd);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001846}
1847
Roland Dreierac2ae4c2006-04-19 11:40:12 -07001848static int __init infinipath_init(void)
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001849{
1850 int ret;
1851
Bryan O'Sullivanb55f4f02006-08-25 11:24:33 -07001852 ipath_dbg(KERN_INFO DRIVER_LOAD_MSG "%s", ib_ipath_version);
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001853
1854 /*
1855 * These must be called before the driver is registered with
1856 * the PCI subsystem.
1857 */
1858 idr_init(&unit_table);
1859 if (!idr_pre_get(&unit_table, GFP_KERNEL)) {
1860 ret = -ENOMEM;
1861 goto bail;
1862 }
1863
1864 ret = pci_register_driver(&ipath_driver);
1865 if (ret < 0) {
1866 printk(KERN_ERR IPATH_DRV_NAME
1867 ": Unable to register driver: error %d\n", -ret);
1868 goto bail_unit;
1869 }
1870
1871 ret = ipath_driver_create_group(&ipath_driver.driver);
1872 if (ret < 0) {
1873 printk(KERN_ERR IPATH_DRV_NAME ": Unable to create driver "
1874 "sysfs entries: error %d\n", -ret);
1875 goto bail_pci;
1876 }
1877
1878 ret = ipath_init_ipathfs();
1879 if (ret < 0) {
1880 printk(KERN_ERR IPATH_DRV_NAME ": Unable to create "
1881 "ipathfs: error %d\n", -ret);
1882 goto bail_group;
1883 }
1884
Bryan O'Sullivan98341f22006-08-25 11:24:36 -07001885 ret = ipath_diagpkt_add();
1886 if (ret < 0) {
1887 printk(KERN_ERR IPATH_DRV_NAME ": Unable to create "
1888 "diag data device: error %d\n", -ret);
1889 goto bail_ipathfs;
1890 }
1891
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001892 goto bail;
1893
Bryan O'Sullivan98341f22006-08-25 11:24:36 -07001894bail_ipathfs:
1895 ipath_exit_ipathfs();
1896
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001897bail_group:
1898 ipath_driver_remove_group(&ipath_driver.driver);
1899
1900bail_pci:
1901 pci_unregister_driver(&ipath_driver);
1902
1903bail_unit:
1904 idr_destroy(&unit_table);
1905
1906bail:
1907 return ret;
1908}
1909
1910static void cleanup_device(struct ipath_devdata *dd)
1911{
1912 int port;
1913
1914 ipath_shutdown_device(dd);
1915
1916 if (*dd->ipath_statusp & IPATH_STATUS_CHIP_PRESENT) {
1917 /* can't do anything more with chip; needs re-init */
1918 *dd->ipath_statusp &= ~IPATH_STATUS_CHIP_PRESENT;
1919 if (dd->ipath_kregbase) {
1920 /*
1921 * if we haven't already cleaned up before these are
1922 * to ensure any register reads/writes "fail" until
1923 * re-init
1924 */
1925 dd->ipath_kregbase = NULL;
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001926 dd->ipath_uregbase = 0;
1927 dd->ipath_sregbase = 0;
1928 dd->ipath_cregbase = 0;
1929 dd->ipath_kregsize = 0;
1930 }
1931 ipath_disable_wc(dd);
1932 }
1933
1934 if (dd->ipath_pioavailregs_dma) {
1935 dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
1936 (void *) dd->ipath_pioavailregs_dma,
1937 dd->ipath_pioavailregs_phys);
1938 dd->ipath_pioavailregs_dma = NULL;
1939 }
Bryan O'Sullivan35783ec2006-07-01 04:36:15 -07001940 if (dd->ipath_dummy_hdrq) {
1941 dma_free_coherent(&dd->pcidev->dev,
1942 dd->ipath_pd[0]->port_rcvhdrq_size,
1943 dd->ipath_dummy_hdrq, dd->ipath_dummy_hdrq_phys);
1944 dd->ipath_dummy_hdrq = NULL;
1945 }
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001946
1947 if (dd->ipath_pageshadow) {
1948 struct page **tmpp = dd->ipath_pageshadow;
1949 int i, cnt = 0;
1950
1951 ipath_cdbg(VERBOSE, "Unlocking any expTID pages still "
1952 "locked\n");
1953 for (port = 0; port < dd->ipath_cfgports; port++) {
1954 int port_tidbase = port * dd->ipath_rcvtidcnt;
1955 int maxtid = port_tidbase + dd->ipath_rcvtidcnt;
1956 for (i = port_tidbase; i < maxtid; i++) {
1957 if (!tmpp[i])
1958 continue;
1959 ipath_release_user_pages(&tmpp[i], 1);
1960 tmpp[i] = NULL;
1961 cnt++;
1962 }
1963 }
1964 if (cnt) {
1965 ipath_stats.sps_pageunlocks += cnt;
1966 ipath_cdbg(VERBOSE, "There were still %u expTID "
1967 "entries locked\n", cnt);
1968 }
1969 if (ipath_stats.sps_pagelocks ||
1970 ipath_stats.sps_pageunlocks)
1971 ipath_cdbg(VERBOSE, "%llu pages locked, %llu "
1972 "unlocked via ipath_m{un}lock\n",
1973 (unsigned long long)
1974 ipath_stats.sps_pagelocks,
1975 (unsigned long long)
1976 ipath_stats.sps_pageunlocks);
1977
1978 ipath_cdbg(VERBOSE, "Free shadow page tid array at %p\n",
1979 dd->ipath_pageshadow);
1980 vfree(dd->ipath_pageshadow);
1981 dd->ipath_pageshadow = NULL;
1982 }
1983
1984 /*
1985 * free any resources still in use (usually just kernel ports)
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001986 * at unload; we do for portcnt, not cfgports, because cfgports
1987 * could have changed while we were loaded.
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001988 */
Bryan O'Sullivanf37bda92006-07-01 04:36:03 -07001989 for (port = 0; port < dd->ipath_portcnt; port++) {
1990 struct ipath_portdata *pd = dd->ipath_pd[port];
1991 dd->ipath_pd[port] = NULL;
1992 ipath_free_pddata(dd, pd);
1993 }
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08001994 kfree(dd->ipath_pd);
1995 /*
1996 * debuggability, in case some cleanup path tries to use it
1997 * after this
1998 */
1999 dd->ipath_pd = NULL;
2000}
2001
2002static void __exit infinipath_cleanup(void)
2003{
2004 struct ipath_devdata *dd, *tmp;
2005 unsigned long flags;
2006
Bryan O'Sullivan98341f22006-08-25 11:24:36 -07002007 ipath_diagpkt_remove();
2008
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08002009 ipath_exit_ipathfs();
2010
2011 ipath_driver_remove_group(&ipath_driver.driver);
2012
2013 spin_lock_irqsave(&ipath_devs_lock, flags);
2014
2015 /*
2016 * turn off rcv, send, and interrupts for all ports, all drivers
2017 * should also hard reset the chip here?
2018 * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs
2019 * for all versions of the driver, if they were allocated
2020 */
2021 list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) {
2022 spin_unlock_irqrestore(&ipath_devs_lock, flags);
2023
2024 if (dd->ipath_kregbase)
2025 cleanup_device(dd);
2026
2027 if (dd->pcidev) {
2028 if (dd->pcidev->irq) {
2029 ipath_cdbg(VERBOSE,
2030 "unit %u free_irq of irq %x\n",
2031 dd->ipath_unit, dd->pcidev->irq);
2032 free_irq(dd->pcidev->irq, dd);
2033 } else
2034 ipath_dbg("irq is 0, not doing free_irq "
2035 "for unit %u\n", dd->ipath_unit);
Bryan O'Sullivanb0ff7c22006-05-23 11:32:33 -07002036
2037 /*
2038 * we check for NULL here, because it's outside
2039 * the kregbase check, and we need to call it
2040 * after the free_irq. Thus it's possible that
2041 * the function pointers were never initialized.
2042 */
2043 if (dd->ipath_f_cleanup)
2044 /* clean up chip-specific stuff */
2045 dd->ipath_f_cleanup(dd);
2046
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08002047 dd->pcidev = NULL;
2048 }
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08002049 spin_lock_irqsave(&ipath_devs_lock, flags);
2050 }
2051
2052 spin_unlock_irqrestore(&ipath_devs_lock, flags);
2053
2054 ipath_cdbg(VERBOSE, "Unregistering pci driver\n");
2055 pci_unregister_driver(&ipath_driver);
2056
2057 idr_destroy(&unit_table);
2058}
2059
2060/**
2061 * ipath_reset_device - reset the chip if possible
2062 * @unit: the device to reset
2063 *
2064 * Whether or not reset is successful, we attempt to re-initialize the chip
2065 * (that is, much like a driver unload/reload). We clear the INITTED flag
2066 * so that the various entry points will fail until we reinitialize. For
2067 * now, we only allow this if no user ports are open that use chip resources
2068 */
2069int ipath_reset_device(int unit)
2070{
2071 int ret, i;
2072 struct ipath_devdata *dd = ipath_lookup(unit);
2073
2074 if (!dd) {
2075 ret = -ENODEV;
2076 goto bail;
2077 }
2078
2079 dev_info(&dd->pcidev->dev, "Reset on unit %u requested\n", unit);
2080
2081 if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) {
2082 dev_info(&dd->pcidev->dev, "Invalid unit number %u or "
2083 "not initialized or not present\n", unit);
2084 ret = -ENXIO;
2085 goto bail;
2086 }
2087
2088 if (dd->ipath_pd)
Bryan O'Sullivan23e86a42006-04-24 14:22:59 -07002089 for (i = 1; i < dd->ipath_cfgports; i++) {
Bryan O'Sullivan7bb206e2006-03-29 15:23:24 -08002090 if (dd->ipath_pd[i] && dd->ipath_pd[i]->port_cnt) {
2091 ipath_dbg("unit %u port %d is in use "
2092 "(PID %u cmd %s), can't reset\n",
2093 unit, i,
2094 dd->ipath_pd[i]->port_pid,
2095 dd->ipath_pd[i]->port_comm);
2096 ret = -EBUSY;
2097 goto bail;
2098 }
2099 }
2100
2101 dd->ipath_flags &= ~IPATH_INITTED;
2102 ret = dd->ipath_f_reset(dd);
2103 if (ret != 1)
2104 ipath_dbg("reset was not successful\n");
2105 ipath_dbg("Trying to reinitialize unit %u after reset attempt\n",
2106 unit);
2107 ret = ipath_init_chip(dd, 1);
2108 if (ret)
2109 ipath_dev_err(dd, "Reinitialize unit %u after "
2110 "reset failed with %d\n", unit, ret);
2111 else
2112 dev_info(&dd->pcidev->dev, "Reinitialized unit %u after "
2113 "resetting\n", unit);
2114
2115bail:
2116 return ret;
2117}
2118
2119module_init(infinipath_init);
2120module_exit(infinipath_cleanup);