Commit | Line | Data |
---|---|---|
7bb206e3 | 1 | /* |
e7eacd36 | 2 | * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved. |
7bb206e3 BS |
3 | * 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 | ||
fd0a1b86 LR |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
7bb206e3 BS |
36 | #include <linux/spinlock.h> |
37 | #include <linux/idr.h> | |
38 | #include <linux/pci.h> | |
9bec3992 | 39 | #include <linux/io.h> |
7bb206e3 BS |
40 | #include <linux/delay.h> |
41 | #include <linux/netdevice.h> | |
42 | #include <linux/vmalloc.h> | |
598cb6f3 | 43 | #include <linux/bitmap.h> |
5a0e3ad6 | 44 | #include <linux/slab.h> |
e4dd23d7 | 45 | #include <linux/module.h> |
7ea402d0 LR |
46 | #ifdef CONFIG_X86_64 |
47 | #include <asm/pat.h> | |
48 | #endif | |
7bb206e3 BS |
49 | |
50 | #include "ipath_kernel.h" | |
b1c1b6a3 | 51 | #include "ipath_verbs.h" |
7bb206e3 BS |
52 | |
53 | static void ipath_update_pio_bufs(struct ipath_devdata *); | |
54 | ||
55 | const char *ipath_get_unit_name(int unit) | |
56 | { | |
57 | static char iname[16]; | |
58 | snprintf(iname, sizeof iname, "infinipath%u", unit); | |
59 | return iname; | |
60 | } | |
61 | ||
759d5768 | 62 | #define DRIVER_LOAD_MSG "QLogic " IPATH_DRV_NAME " loaded: " |
7bb206e3 BS |
63 | #define PFX IPATH_DRV_NAME ": " |
64 | ||
65 | /* | |
66 | * The size has to be longer than this string, so we can append | |
67 | * board/chip information to it in the init code. | |
68 | */ | |
b55f4f06 | 69 | const char ib_ipath_version[] = IPATH_IDSTR "\n"; |
7bb206e3 BS |
70 | |
71 | static struct idr unit_table; | |
72 | DEFINE_SPINLOCK(ipath_devs_lock); | |
73 | LIST_HEAD(ipath_dev_list); | |
74 | ||
0fd41363 | 75 | wait_queue_head_t ipath_state_wait; |
7bb206e3 BS |
76 | |
77 | unsigned ipath_debug = __IPATH_INFO; | |
78 | ||
79 | module_param_named(debug, ipath_debug, uint, S_IWUSR | S_IRUGO); | |
80 | MODULE_PARM_DESC(debug, "mask for debug prints"); | |
81 | EXPORT_SYMBOL_GPL(ipath_debug); | |
82 | ||
826d8010 DO |
83 | unsigned ipath_mtu4096 = 1; /* max 4KB IB mtu by default, if supported */ |
84 | module_param_named(mtu4096, ipath_mtu4096, uint, S_IRUGO); | |
85 | MODULE_PARM_DESC(mtu4096, "enable MTU of 4096 bytes, if supported"); | |
86 | ||
58411d1c JG |
87 | static unsigned ipath_hol_timeout_ms = 13000; |
88 | module_param_named(hol_timeout_ms, ipath_hol_timeout_ms, uint, S_IRUGO); | |
89 | MODULE_PARM_DESC(hol_timeout_ms, | |
90 | "duration of user app suspension after link failure"); | |
91 | ||
72708a0a DO |
92 | unsigned ipath_linkrecovery = 1; |
93 | module_param_named(linkrecovery, ipath_linkrecovery, uint, S_IWUSR | S_IRUGO); | |
94 | MODULE_PARM_DESC(linkrecovery, "enable workaround for link recovery issue"); | |
95 | ||
7bb206e3 | 96 | MODULE_LICENSE("GPL"); |
928e3e4b | 97 | MODULE_AUTHOR("QLogic <support@qlogic.com>"); |
759d5768 | 98 | MODULE_DESCRIPTION("QLogic InfiniPath driver"); |
7bb206e3 | 99 | |
bb917144 AJ |
100 | /* |
101 | * Table to translate the LINKTRAININGSTATE portion of | |
102 | * IBCStatus to a human-readable form. | |
103 | */ | |
7bb206e3 BS |
104 | const char *ipath_ibcstatus_str[] = { |
105 | "Disabled", | |
106 | "LinkUp", | |
107 | "PollActive", | |
108 | "PollQuiet", | |
109 | "SleepDelay", | |
110 | "SleepQuiet", | |
111 | "LState6", /* unused */ | |
112 | "LState7", /* unused */ | |
113 | "CfgDebounce", | |
114 | "CfgRcvfCfg", | |
115 | "CfgWaitRmt", | |
116 | "CfgIdle", | |
117 | "RecovRetrain", | |
bb917144 | 118 | "CfgTxRevLane", /* unused before IBA7220 */ |
7bb206e3 BS |
119 | "RecovWaitRmt", |
120 | "RecovIdle", | |
bb917144 AJ |
121 | /* below were added for IBA7220 */ |
122 | "CfgEnhanced", | |
123 | "CfgTest", | |
124 | "CfgWaitRmtTest", | |
125 | "CfgWaitCfgEnhanced", | |
126 | "SendTS_T", | |
127 | "SendTstIdles", | |
128 | "RcvTS_T", | |
129 | "SendTst_TS1s", | |
130 | "LTState18", "LTState19", "LTState1A", "LTState1B", | |
131 | "LTState1C", "LTState1D", "LTState1E", "LTState1F" | |
7bb206e3 BS |
132 | }; |
133 | ||
1e6d9abe GKH |
134 | static void ipath_remove_one(struct pci_dev *); |
135 | static int ipath_init_one(struct pci_dev *, const struct pci_device_id *); | |
7bb206e3 BS |
136 | |
137 | /* Only needed for registration, nothing else needs this info */ | |
138 | #define PCI_VENDOR_ID_PATHSCALE 0x1fc1 | |
139 | #define PCI_DEVICE_ID_INFINIPATH_HT 0xd | |
7bb206e3 | 140 | |
3588423f AJ |
141 | /* Number of seconds before our card status check... */ |
142 | #define STATUS_TIMEOUT 60 | |
143 | ||
7bb206e3 | 144 | static const struct pci_device_id ipath_pci_tbl[] = { |
6f4bb3d8 | 145 | { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_HT) }, |
6f4bb3d8 | 146 | { 0, } |
7bb206e3 BS |
147 | }; |
148 | ||
149 | MODULE_DEVICE_TABLE(pci, ipath_pci_tbl); | |
150 | ||
151 | static struct pci_driver ipath_driver = { | |
152 | .name = IPATH_DRV_NAME, | |
153 | .probe = ipath_init_one, | |
1e6d9abe | 154 | .remove = ipath_remove_one, |
7bb206e3 | 155 | .id_table = ipath_pci_tbl, |
23b9c1ab GKH |
156 | .driver = { |
157 | .groups = ipath_driver_attr_groups, | |
158 | }, | |
7bb206e3 BS |
159 | }; |
160 | ||
7bb206e3 BS |
161 | static inline void read_bars(struct ipath_devdata *dd, struct pci_dev *dev, |
162 | u32 *bar0, u32 *bar1) | |
163 | { | |
164 | int ret; | |
165 | ||
166 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, bar0); | |
167 | if (ret) | |
168 | ipath_dev_err(dd, "failed to read bar0 before enable: " | |
169 | "error %d\n", -ret); | |
170 | ||
171 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, bar1); | |
172 | if (ret) | |
173 | ipath_dev_err(dd, "failed to read bar1 before enable: " | |
174 | "error %d\n", -ret); | |
175 | ||
176 | ipath_dbg("Read bar0 %x bar1 %x\n", *bar0, *bar1); | |
177 | } | |
178 | ||
179 | static void ipath_free_devdata(struct pci_dev *pdev, | |
180 | struct ipath_devdata *dd) | |
181 | { | |
182 | unsigned long flags; | |
183 | ||
184 | pci_set_drvdata(pdev, NULL); | |
185 | ||
186 | if (dd->ipath_unit != -1) { | |
187 | spin_lock_irqsave(&ipath_devs_lock, flags); | |
188 | idr_remove(&unit_table, dd->ipath_unit); | |
189 | list_del(&dd->ipath_list); | |
190 | spin_unlock_irqrestore(&ipath_devs_lock, flags); | |
191 | } | |
06993ca6 | 192 | vfree(dd); |
7bb206e3 BS |
193 | } |
194 | ||
195 | static struct ipath_devdata *ipath_alloc_devdata(struct pci_dev *pdev) | |
196 | { | |
197 | unsigned long flags; | |
198 | struct ipath_devdata *dd; | |
7bb206e3 BS |
199 | int ret; |
200 | ||
948579cd | 201 | dd = vzalloc(sizeof(*dd)); |
7bb206e3 BS |
202 | if (!dd) { |
203 | dd = ERR_PTR(-ENOMEM); | |
204 | goto bail; | |
205 | } | |
7bb206e3 BS |
206 | dd->ipath_unit = -1; |
207 | ||
5c213f86 | 208 | idr_preload(GFP_KERNEL); |
7bb206e3 BS |
209 | spin_lock_irqsave(&ipath_devs_lock, flags); |
210 | ||
5c213f86 | 211 | ret = idr_alloc(&unit_table, dd, 0, 0, GFP_NOWAIT); |
7bb206e3 BS |
212 | if (ret < 0) { |
213 | printk(KERN_ERR IPATH_DRV_NAME | |
214 | ": Could not allocate unit ID: error %d\n", -ret); | |
215 | ipath_free_devdata(pdev, dd); | |
216 | dd = ERR_PTR(ret); | |
217 | goto bail_unlock; | |
218 | } | |
5c213f86 | 219 | dd->ipath_unit = ret; |
7bb206e3 BS |
220 | |
221 | dd->pcidev = pdev; | |
222 | pci_set_drvdata(pdev, dd); | |
223 | ||
224 | list_add(&dd->ipath_list, &ipath_dev_list); | |
225 | ||
226 | bail_unlock: | |
227 | spin_unlock_irqrestore(&ipath_devs_lock, flags); | |
5c213f86 | 228 | idr_preload_end(); |
7bb206e3 BS |
229 | bail: |
230 | return dd; | |
231 | } | |
232 | ||
233 | static inline struct ipath_devdata *__ipath_lookup(int unit) | |
234 | { | |
235 | return idr_find(&unit_table, unit); | |
236 | } | |
237 | ||
238 | struct ipath_devdata *ipath_lookup(int unit) | |
239 | { | |
240 | struct ipath_devdata *dd; | |
241 | unsigned long flags; | |
242 | ||
243 | spin_lock_irqsave(&ipath_devs_lock, flags); | |
244 | dd = __ipath_lookup(unit); | |
245 | spin_unlock_irqrestore(&ipath_devs_lock, flags); | |
246 | ||
247 | return dd; | |
248 | } | |
249 | ||
6ef6aee2 | 250 | int ipath_count_units(int *npresentp, int *nupp, int *maxportsp) |
7bb206e3 BS |
251 | { |
252 | int nunits, npresent, nup; | |
253 | struct ipath_devdata *dd; | |
254 | unsigned long flags; | |
6ef6aee2 | 255 | int maxports; |
7bb206e3 BS |
256 | |
257 | nunits = npresent = nup = maxports = 0; | |
258 | ||
259 | spin_lock_irqsave(&ipath_devs_lock, flags); | |
260 | ||
261 | list_for_each_entry(dd, &ipath_dev_list, ipath_list) { | |
262 | nunits++; | |
263 | if ((dd->ipath_flags & IPATH_PRESENT) && dd->ipath_kregbase) | |
264 | npresent++; | |
265 | if (dd->ipath_lid && | |
266 | !(dd->ipath_flags & (IPATH_DISABLED | IPATH_LINKDOWN | |
267 | | IPATH_LINKUNK))) | |
268 | nup++; | |
269 | if (dd->ipath_cfgports > maxports) | |
270 | maxports = dd->ipath_cfgports; | |
271 | } | |
272 | ||
273 | spin_unlock_irqrestore(&ipath_devs_lock, flags); | |
274 | ||
275 | if (npresentp) | |
276 | *npresentp = npresent; | |
277 | if (nupp) | |
278 | *nupp = nup; | |
279 | if (maxportsp) | |
280 | *maxportsp = maxports; | |
281 | ||
282 | return nunits; | |
283 | } | |
284 | ||
7bb206e3 BS |
285 | /* |
286 | * These next two routines are placeholders in case we don't have per-arch | |
287 | * code for controlling write combining. If explicit control of write | |
288 | * combining is not available, performance will probably be awful. | |
289 | */ | |
290 | ||
291 | int __attribute__((weak)) ipath_enable_wc(struct ipath_devdata *dd) | |
292 | { | |
293 | return -EOPNOTSUPP; | |
294 | } | |
295 | ||
296 | void __attribute__((weak)) ipath_disable_wc(struct ipath_devdata *dd) | |
297 | { | |
298 | } | |
299 | ||
9bec3992 DO |
300 | /* |
301 | * Perform a PIO buffer bandwidth write test, to verify proper system | |
302 | * configuration. Even when all the setup calls work, occasionally | |
303 | * BIOS or other issues can prevent write combining from working, or | |
304 | * can cause other bandwidth problems to the chip. | |
305 | * | |
306 | * This test simply writes the same buffer over and over again, and | |
307 | * measures close to the peak bandwidth to the chip (not testing | |
308 | * data bandwidth to the wire). On chips that use an address-based | |
309 | * trigger to send packets to the wire, this is easy. On chips that | |
310 | * use a count to trigger, we want to make sure that the packet doesn't | |
311 | * go out on the wire, or trigger flow control checks. | |
312 | */ | |
313 | static void ipath_verify_pioperf(struct ipath_devdata *dd) | |
314 | { | |
315 | u32 pbnum, cnt, lcnt; | |
316 | u32 __iomem *piobuf; | |
317 | u32 *addr; | |
318 | u64 msecs, emsecs; | |
319 | ||
c4b4d16e | 320 | piobuf = ipath_getpiobuf(dd, 0, &pbnum); |
9bec3992 DO |
321 | if (!piobuf) { |
322 | dev_info(&dd->pcidev->dev, | |
323 | "No PIObufs for checking perf, skipping\n"); | |
324 | return; | |
325 | } | |
326 | ||
327 | /* | |
328 | * Enough to give us a reasonable test, less than piobuf size, and | |
329 | * likely multiple of store buffer length. | |
330 | */ | |
331 | cnt = 1024; | |
332 | ||
333 | addr = vmalloc(cnt); | |
334 | if (!addr) { | |
335 | dev_info(&dd->pcidev->dev, | |
336 | "Couldn't get memory for checking PIO perf," | |
337 | " skipping\n"); | |
338 | goto done; | |
339 | } | |
340 | ||
341 | preempt_disable(); /* we want reasonably accurate elapsed time */ | |
342 | msecs = 1 + jiffies_to_msecs(jiffies); | |
343 | for (lcnt = 0; lcnt < 10000U; lcnt++) { | |
344 | /* wait until we cross msec boundary */ | |
345 | if (jiffies_to_msecs(jiffies) >= msecs) | |
346 | break; | |
347 | udelay(1); | |
348 | } | |
349 | ||
6ac50727 DO |
350 | ipath_disable_armlaunch(dd); |
351 | ||
bb917144 AJ |
352 | /* |
353 | * length 0, no dwords actually sent, and mark as VL15 | |
354 | * on chips where that may matter (due to IB flowcontrol) | |
355 | */ | |
356 | if ((dd->ipath_flags & IPATH_HAS_PBC_CNT)) | |
357 | writeq(1UL << 63, piobuf); | |
358 | else | |
359 | writeq(0, piobuf); | |
9bec3992 DO |
360 | ipath_flush_wc(); |
361 | ||
362 | /* | |
363 | * this is only roughly accurate, since even with preempt we | |
364 | * still take interrupts that could take a while. Running for | |
365 | * >= 5 msec seems to get us "close enough" to accurate values | |
366 | */ | |
367 | msecs = jiffies_to_msecs(jiffies); | |
368 | for (emsecs = lcnt = 0; emsecs <= 5UL; lcnt++) { | |
369 | __iowrite32_copy(piobuf + 64, addr, cnt >> 2); | |
370 | emsecs = jiffies_to_msecs(jiffies) - msecs; | |
371 | } | |
372 | ||
373 | /* 1 GiB/sec, slightly over IB SDR line rate */ | |
374 | if (lcnt < (emsecs * 1024U)) | |
375 | ipath_dev_err(dd, | |
376 | "Performance problem: bandwidth to PIO buffers is " | |
377 | "only %u MiB/sec\n", | |
378 | lcnt / (u32) emsecs); | |
379 | else | |
380 | ipath_dbg("PIO buffer bandwidth %u MiB/sec is OK\n", | |
381 | lcnt / (u32) emsecs); | |
382 | ||
383 | preempt_enable(); | |
384 | ||
385 | vfree(addr); | |
386 | ||
387 | done: | |
388 | /* disarm piobuf, so it's available again */ | |
389 | ipath_disarm_piobufs(dd, pbnum, 1); | |
6ac50727 | 390 | ipath_enable_armlaunch(dd); |
9bec3992 DO |
391 | } |
392 | ||
dccb816d BH |
393 | static void cleanup_device(struct ipath_devdata *dd); |
394 | ||
1e6d9abe | 395 | static int ipath_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) |
7bb206e3 BS |
396 | { |
397 | int ret, len, j; | |
398 | struct ipath_devdata *dd; | |
399 | unsigned long long addr; | |
400 | u32 bar0 = 0, bar1 = 0; | |
7bb206e3 | 401 | |
7ea402d0 | 402 | #ifdef CONFIG_X86_64 |
fd0a1b86 LR |
403 | if (pat_enabled()) { |
404 | pr_warn("ipath needs PAT disabled, boot with nopat kernel parameter\n"); | |
7ea402d0 LR |
405 | ret = -ENODEV; |
406 | goto bail; | |
407 | } | |
408 | #endif | |
409 | ||
7bb206e3 BS |
410 | dd = ipath_alloc_devdata(pdev); |
411 | if (IS_ERR(dd)) { | |
412 | ret = PTR_ERR(dd); | |
413 | printk(KERN_ERR IPATH_DRV_NAME | |
414 | ": Could not allocate devdata: error %d\n", -ret); | |
f37bda92 | 415 | goto bail; |
7bb206e3 BS |
416 | } |
417 | ||
418 | ipath_cdbg(VERBOSE, "initializing unit #%u\n", dd->ipath_unit); | |
419 | ||
7bb206e3 BS |
420 | ret = pci_enable_device(pdev); |
421 | if (ret) { | |
422 | /* This can happen iff: | |
423 | * | |
424 | * We did a chip reset, and then failed to reprogram the | |
425 | * BAR, or the chip reset due to an internal error. We then | |
426 | * unloaded the driver and reloaded it. | |
427 | * | |
428 | * Both reset cases set the BAR back to initial state. For | |
429 | * the latter case, the AER sticky error bit at offset 0x718 | |
430 | * should be set, but the Linux kernel doesn't yet know | |
431 | * about that, it appears. If the original BAR was retained | |
432 | * in the kernel data structures, this may be OK. | |
433 | */ | |
434 | ipath_dev_err(dd, "enable unit %d failed: error %d\n", | |
435 | dd->ipath_unit, -ret); | |
436 | goto bail_devdata; | |
437 | } | |
438 | addr = pci_resource_start(pdev, 0); | |
439 | len = pci_resource_len(pdev, 0); | |
bb917144 | 440 | ipath_cdbg(VERBOSE, "regbase (0) %llx len %d irq %d, vend %x/%x " |
7bb206e3 BS |
441 | "driver_data %lx\n", addr, len, pdev->irq, ent->vendor, |
442 | ent->device, ent->driver_data); | |
443 | ||
444 | read_bars(dd, pdev, &bar0, &bar1); | |
445 | ||
446 | if (!bar1 && !(bar0 & ~0xf)) { | |
447 | if (addr) { | |
448 | dev_info(&pdev->dev, "BAR is 0 (probable RESET), " | |
449 | "rewriting as %llx\n", addr); | |
450 | ret = pci_write_config_dword( | |
451 | pdev, PCI_BASE_ADDRESS_0, addr); | |
452 | if (ret) { | |
453 | ipath_dev_err(dd, "rewrite of BAR0 " | |
454 | "failed: err %d\n", -ret); | |
455 | goto bail_disable; | |
456 | } | |
457 | ret = pci_write_config_dword( | |
458 | pdev, PCI_BASE_ADDRESS_1, addr >> 32); | |
459 | if (ret) { | |
460 | ipath_dev_err(dd, "rewrite of BAR1 " | |
461 | "failed: err %d\n", -ret); | |
462 | goto bail_disable; | |
463 | } | |
464 | } else { | |
465 | ipath_dev_err(dd, "BAR is 0 (probable RESET), " | |
466 | "not usable until reboot\n"); | |
467 | ret = -ENODEV; | |
468 | goto bail_disable; | |
469 | } | |
470 | } | |
471 | ||
472 | ret = pci_request_regions(pdev, IPATH_DRV_NAME); | |
473 | if (ret) { | |
474 | dev_info(&pdev->dev, "pci_request_regions unit %u fails: " | |
475 | "err %d\n", dd->ipath_unit, -ret); | |
476 | goto bail_disable; | |
477 | } | |
478 | ||
6a35528a | 479 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
7bb206e3 | 480 | if (ret) { |
68dd43a1 BS |
481 | /* |
482 | * if the 64 bit setup fails, try 32 bit. Some systems | |
483 | * do not setup 64 bit maps on systems with 2GB or less | |
484 | * memory installed. | |
485 | */ | |
284901a9 | 486 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
68dd43a1 | 487 | if (ret) { |
b1d8865a BS |
488 | dev_info(&pdev->dev, |
489 | "Unable to set DMA mask for unit %u: %d\n", | |
490 | dd->ipath_unit, ret); | |
68dd43a1 | 491 | goto bail_regions; |
63417188 | 492 | } else { |
68dd43a1 | 493 | ipath_dbg("No 64bit DMA mask, used 32 bit mask\n"); |
284901a9 | 494 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
b1d8865a BS |
495 | if (ret) |
496 | dev_info(&pdev->dev, | |
497 | "Unable to set DMA consistent mask " | |
498 | "for unit %u: %d\n", | |
499 | dd->ipath_unit, ret); | |
500 | ||
501 | } | |
63417188 | 502 | } else { |
6a35528a | 503 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
b1d8865a BS |
504 | if (ret) |
505 | dev_info(&pdev->dev, | |
506 | "Unable to set DMA consistent mask " | |
507 | "for unit %u: %d\n", | |
508 | dd->ipath_unit, ret); | |
7bb206e3 BS |
509 | } |
510 | ||
511 | pci_set_master(pdev); | |
512 | ||
513 | /* | |
514 | * Save BARs to rewrite after device reset. Save all 64 bits of | |
515 | * BAR, just in case. | |
516 | */ | |
517 | dd->ipath_pcibar0 = addr; | |
518 | dd->ipath_pcibar1 = addr >> 32; | |
519 | dd->ipath_deviceid = ent->device; /* save for later use */ | |
520 | dd->ipath_vendorid = ent->vendor; | |
521 | ||
522 | /* setup the chip-specific functions, as early as possible. */ | |
523 | switch (ent->device) { | |
524 | case PCI_DEVICE_ID_INFINIPATH_HT: | |
525d0ca1 | 525 | ipath_init_iba6110_funcs(dd); |
7bb206e3 | 526 | break; |
f6d60848 | 527 | |
7bb206e3 | 528 | default: |
759d5768 | 529 | ipath_dev_err(dd, "Found unknown QLogic deviceid 0x%x, " |
7bb206e3 BS |
530 | "failing\n", ent->device); |
531 | return -ENODEV; | |
532 | } | |
533 | ||
534 | for (j = 0; j < 6; j++) { | |
535 | if (!pdev->resource[j].start) | |
536 | continue; | |
1eba27e8 JP |
537 | ipath_cdbg(VERBOSE, "BAR %d %pR, len %llx\n", |
538 | j, &pdev->resource[j], | |
e29419ff | 539 | (unsigned long long)pci_resource_len(pdev, j)); |
7bb206e3 BS |
540 | } |
541 | ||
542 | if (!addr) { | |
543 | ipath_dev_err(dd, "No valid address in BAR 0!\n"); | |
544 | ret = -ENODEV; | |
545 | goto bail_regions; | |
546 | } | |
547 | ||
ec03d677 | 548 | dd->ipath_pcirev = pdev->revision; |
7bb206e3 | 549 | |
eb9dc6f4 BS |
550 | #if defined(__powerpc__) |
551 | /* There isn't a generic way to specify writethrough mappings */ | |
552 | dd->ipath_kregbase = __ioremap(addr, len, | |
553 | (_PAGE_NO_CACHE|_PAGE_WRITETHRU)); | |
554 | #else | |
7ea402d0 | 555 | /* XXX: split this properly to enable on PAT */ |
7bb206e3 | 556 | dd->ipath_kregbase = ioremap_nocache(addr, len); |
eb9dc6f4 | 557 | #endif |
7bb206e3 BS |
558 | |
559 | if (!dd->ipath_kregbase) { | |
560 | ipath_dbg("Unable to map io addr %llx to kvirt, failing\n", | |
561 | addr); | |
562 | ret = -ENOMEM; | |
563 | goto bail_iounmap; | |
564 | } | |
565 | dd->ipath_kregend = (u64 __iomem *) | |
566 | ((void __iomem *)dd->ipath_kregbase + len); | |
567 | dd->ipath_physaddr = addr; /* used for io_remap, etc. */ | |
568 | /* for user mmap */ | |
b35f004d BS |
569 | ipath_cdbg(VERBOSE, "mapped io addr %llx to kregbase %p\n", |
570 | addr, dd->ipath_kregbase); | |
7bb206e3 | 571 | |
7bb206e3 BS |
572 | if (dd->ipath_f_bus(dd, pdev)) |
573 | ipath_dev_err(dd, "Failed to setup config space; " | |
574 | "continuing anyway\n"); | |
575 | ||
576 | /* | |
dace1453 | 577 | * set up our interrupt handler; IRQF_SHARED probably not needed, |
7bb206e3 BS |
578 | * since MSI interrupts shouldn't be shared but won't hurt for now. |
579 | * check 0 irq after we return from chip-specific bus setup, since | |
580 | * that can affect this due to setup | |
581 | */ | |
51f65ebc | 582 | if (!dd->ipath_irq) |
7bb206e3 BS |
583 | ipath_dev_err(dd, "irq is 0, BIOS error? Interrupts won't " |
584 | "work\n"); | |
585 | else { | |
51f65ebc | 586 | ret = request_irq(dd->ipath_irq, ipath_intr, IRQF_SHARED, |
7bb206e3 BS |
587 | IPATH_DRV_NAME, dd); |
588 | if (ret) { | |
589 | ipath_dev_err(dd, "Couldn't setup irq handler, " | |
51f65ebc | 590 | "irq=%d: %d\n", dd->ipath_irq, ret); |
7bb206e3 BS |
591 | goto bail_iounmap; |
592 | } | |
593 | } | |
594 | ||
595 | ret = ipath_init_chip(dd, 0); /* do the chip-specific init */ | |
596 | if (ret) | |
7b196e2f | 597 | goto bail_irqsetup; |
7bb206e3 BS |
598 | |
599 | ret = ipath_enable_wc(dd); | |
600 | ||
7ea402d0 | 601 | if (ret) |
7bb206e3 | 602 | ret = 0; |
7bb206e3 | 603 | |
9bec3992 DO |
604 | ipath_verify_pioperf(dd); |
605 | ||
7bb206e3 BS |
606 | ipath_device_create_group(&pdev->dev, dd); |
607 | ipathfs_add_device(dd); | |
608 | ipath_user_add(dd); | |
a2acb2ff | 609 | ipath_diag_add(dd); |
b1c1b6a3 | 610 | ipath_register_ib_device(dd); |
7bb206e3 BS |
611 | |
612 | goto bail; | |
613 | ||
7b196e2f | 614 | bail_irqsetup: |
dccb816d BH |
615 | cleanup_device(dd); |
616 | ||
617 | if (dd->ipath_irq) | |
618 | dd->ipath_f_free_irq(dd); | |
619 | ||
620 | if (dd->ipath_f_cleanup) | |
621 | dd->ipath_f_cleanup(dd); | |
7b196e2f | 622 | |
7bb206e3 BS |
623 | bail_iounmap: |
624 | iounmap((volatile void __iomem *) dd->ipath_kregbase); | |
625 | ||
626 | bail_regions: | |
627 | pci_release_regions(pdev); | |
628 | ||
629 | bail_disable: | |
630 | pci_disable_device(pdev); | |
631 | ||
632 | bail_devdata: | |
633 | ipath_free_devdata(pdev, dd); | |
634 | ||
7bb206e3 BS |
635 | bail: |
636 | return ret; | |
637 | } | |
638 | ||
dccb816d | 639 | static void cleanup_device(struct ipath_devdata *dd) |
7bb206e3 | 640 | { |
7227aac4 | 641 | int port; |
3d089098 DO |
642 | struct ipath_portdata **tmp; |
643 | unsigned long flags; | |
7bb206e3 | 644 | |
7227aac4 BS |
645 | if (*dd->ipath_statusp & IPATH_STATUS_CHIP_PRESENT) { |
646 | /* can't do anything more with chip; needs re-init */ | |
647 | *dd->ipath_statusp &= ~IPATH_STATUS_CHIP_PRESENT; | |
648 | if (dd->ipath_kregbase) { | |
649 | /* | |
650 | * if we haven't already cleaned up before these are | |
651 | * to ensure any register reads/writes "fail" until | |
652 | * re-init | |
653 | */ | |
654 | dd->ipath_kregbase = NULL; | |
655 | dd->ipath_uregbase = 0; | |
656 | dd->ipath_sregbase = 0; | |
657 | dd->ipath_cregbase = 0; | |
658 | dd->ipath_kregsize = 0; | |
659 | } | |
660 | ipath_disable_wc(dd); | |
661 | } | |
c78f6415 | 662 | |
bb917144 AJ |
663 | if (dd->ipath_spectriggerhit) |
664 | dev_info(&dd->pcidev->dev, "%lu special trigger hits\n", | |
665 | dd->ipath_spectriggerhit); | |
666 | ||
7227aac4 BS |
667 | if (dd->ipath_pioavailregs_dma) { |
668 | dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE, | |
669 | (void *) dd->ipath_pioavailregs_dma, | |
670 | dd->ipath_pioavailregs_phys); | |
671 | dd->ipath_pioavailregs_dma = NULL; | |
672 | } | |
673 | if (dd->ipath_dummy_hdrq) { | |
674 | dma_free_coherent(&dd->pcidev->dev, | |
675 | dd->ipath_pd[0]->port_rcvhdrq_size, | |
676 | dd->ipath_dummy_hdrq, dd->ipath_dummy_hdrq_phys); | |
677 | dd->ipath_dummy_hdrq = NULL; | |
678 | } | |
679 | ||
680 | if (dd->ipath_pageshadow) { | |
681 | struct page **tmpp = dd->ipath_pageshadow; | |
682 | dma_addr_t *tmpd = dd->ipath_physshadow; | |
683 | int i, cnt = 0; | |
684 | ||
685 | ipath_cdbg(VERBOSE, "Unlocking any expTID pages still " | |
686 | "locked\n"); | |
687 | for (port = 0; port < dd->ipath_cfgports; port++) { | |
688 | int port_tidbase = port * dd->ipath_rcvtidcnt; | |
689 | int maxtid = port_tidbase + dd->ipath_rcvtidcnt; | |
690 | for (i = port_tidbase; i < maxtid; i++) { | |
691 | if (!tmpp[i]) | |
692 | continue; | |
693 | pci_unmap_page(dd->pcidev, tmpd[i], | |
694 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
695 | ipath_release_user_pages(&tmpp[i], 1); | |
696 | tmpp[i] = NULL; | |
697 | cnt++; | |
698 | } | |
699 | } | |
700 | if (cnt) { | |
701 | ipath_stats.sps_pageunlocks += cnt; | |
702 | ipath_cdbg(VERBOSE, "There were still %u expTID " | |
703 | "entries locked\n", cnt); | |
704 | } | |
705 | if (ipath_stats.sps_pagelocks || | |
706 | ipath_stats.sps_pageunlocks) | |
707 | ipath_cdbg(VERBOSE, "%llu pages locked, %llu " | |
708 | "unlocked via ipath_m{un}lock\n", | |
709 | (unsigned long long) | |
710 | ipath_stats.sps_pagelocks, | |
711 | (unsigned long long) | |
712 | ipath_stats.sps_pageunlocks); | |
713 | ||
714 | ipath_cdbg(VERBOSE, "Free shadow page tid array at %p\n", | |
715 | dd->ipath_pageshadow); | |
9783ab40 | 716 | tmpp = dd->ipath_pageshadow; |
7227aac4 | 717 | dd->ipath_pageshadow = NULL; |
9783ab40 | 718 | vfree(tmpp); |
9355fb6a RC |
719 | |
720 | dd->ipath_egrtidbase = NULL; | |
c78f6415 BS |
721 | } |
722 | ||
7227aac4 BS |
723 | /* |
724 | * free any resources still in use (usually just kernel ports) | |
3d089098 DO |
725 | * at unload; we do for portcnt, because that's what we allocate. |
726 | * We acquire lock to be really paranoid that ipath_pd isn't being | |
727 | * accessed from some interrupt-related code (that should not happen, | |
728 | * but best to be sure). | |
7227aac4 | 729 | */ |
3d089098 DO |
730 | spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); |
731 | tmp = dd->ipath_pd; | |
732 | dd->ipath_pd = NULL; | |
733 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); | |
7227aac4 | 734 | for (port = 0; port < dd->ipath_portcnt; port++) { |
3d089098 DO |
735 | struct ipath_portdata *pd = tmp[port]; |
736 | tmp[port] = NULL; /* debugging paranoia */ | |
7227aac4 BS |
737 | ipath_free_pddata(dd, pd); |
738 | } | |
3d089098 | 739 | kfree(tmp); |
7227aac4 BS |
740 | } |
741 | ||
1e6d9abe | 742 | static void ipath_remove_one(struct pci_dev *pdev) |
7227aac4 BS |
743 | { |
744 | struct ipath_devdata *dd = pci_get_drvdata(pdev); | |
745 | ||
746 | ipath_cdbg(VERBOSE, "removing, pdev=%p, dd=%p\n", pdev, dd); | |
747 | ||
53c1d2c9 BS |
748 | /* |
749 | * disable the IB link early, to be sure no new packets arrive, which | |
750 | * complicates the shutdown process | |
751 | */ | |
752 | ipath_shutdown_device(dd); | |
753 | ||
f0626710 | 754 | flush_workqueue(ib_wq); |
3588423f | 755 | |
7227aac4 BS |
756 | if (dd->verbs_dev) |
757 | ipath_unregister_ib_device(dd->verbs_dev); | |
758 | ||
a2acb2ff BS |
759 | ipath_diag_remove(dd); |
760 | ipath_user_remove(dd); | |
7bb206e3 BS |
761 | ipathfs_remove_device(dd); |
762 | ipath_device_remove_group(&pdev->dev, dd); | |
7227aac4 | 763 | |
7bb206e3 BS |
764 | ipath_cdbg(VERBOSE, "Releasing pci memory regions, dd %p, " |
765 | "unit %u\n", dd, (u32) dd->ipath_unit); | |
7227aac4 BS |
766 | |
767 | cleanup_device(dd); | |
768 | ||
769 | /* | |
770 | * turn off rcv, send, and interrupts for all ports, all drivers | |
771 | * should also hard reset the chip here? | |
772 | * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs | |
773 | * for all versions of the driver, if they were allocated | |
774 | */ | |
51f65ebc BS |
775 | if (dd->ipath_irq) { |
776 | ipath_cdbg(VERBOSE, "unit %u free irq %d\n", | |
777 | dd->ipath_unit, dd->ipath_irq); | |
778 | dd->ipath_f_free_irq(dd); | |
7227aac4 BS |
779 | } else |
780 | ipath_dbg("irq is 0, not doing free_irq " | |
781 | "for unit %u\n", dd->ipath_unit); | |
782 | /* | |
783 | * we check for NULL here, because it's outside | |
784 | * the kregbase check, and we need to call it | |
785 | * after the free_irq. Thus it's possible that | |
786 | * the function pointers were never initialized. | |
787 | */ | |
788 | if (dd->ipath_f_cleanup) | |
789 | /* clean up chip-specific stuff */ | |
790 | dd->ipath_f_cleanup(dd); | |
791 | ||
792 | ipath_cdbg(VERBOSE, "Unmapping kregbase %p\n", dd->ipath_kregbase); | |
793 | iounmap((volatile void __iomem *) dd->ipath_kregbase); | |
7bb206e3 BS |
794 | pci_release_regions(pdev); |
795 | ipath_cdbg(VERBOSE, "calling pci_disable_device\n"); | |
796 | pci_disable_device(pdev); | |
797 | ||
798 | ipath_free_devdata(pdev, dd); | |
7bb206e3 BS |
799 | } |
800 | ||
801 | /* general driver use */ | |
802 | DEFINE_MUTEX(ipath_mutex); | |
803 | ||
804 | static DEFINE_SPINLOCK(ipath_pioavail_lock); | |
805 | ||
806 | /** | |
807 | * ipath_disarm_piobufs - cancel a range of PIO buffers | |
808 | * @dd: the infinipath device | |
809 | * @first: the first PIO buffer to cancel | |
810 | * @cnt: the number of PIO buffers to cancel | |
811 | * | |
812 | * cancel a range of PIO buffers, used when they might be armed, but | |
813 | * not triggered. Used at init to ensure buffer state, and also user | |
814 | * process close, in case it died while writing to a PIO buffer | |
815 | * Also after errors. | |
816 | */ | |
817 | void ipath_disarm_piobufs(struct ipath_devdata *dd, unsigned first, | |
818 | unsigned cnt) | |
819 | { | |
820 | unsigned i, last = first + cnt; | |
e342c119 | 821 | unsigned long flags; |
7bb206e3 BS |
822 | |
823 | ipath_cdbg(PKT, "disarm %u PIObufs first=%u\n", cnt, first); | |
7bb206e3 | 824 | for (i = first; i < last; i++) { |
e342c119 JG |
825 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
826 | /* | |
827 | * The disarm-related bits are write-only, so it | |
828 | * is ok to OR them in with our copy of sendctrl | |
829 | * while we hold the lock. | |
830 | */ | |
7bb206e3 | 831 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
e342c119 JG |
832 | dd->ipath_sendctrl | INFINIPATH_S_DISARM | |
833 | (i << INFINIPATH_S_DISARMPIOBUF_SHIFT)); | |
834 | /* can't disarm bufs back-to-back per iba7220 spec */ | |
835 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); | |
836 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); | |
7bb206e3 | 837 | } |
c4b4d16e RC |
838 | /* on some older chips, update may not happen after cancel */ |
839 | ipath_force_pio_avail_update(dd); | |
7bb206e3 BS |
840 | } |
841 | ||
842 | /** | |
843 | * ipath_wait_linkstate - wait for an IB link state change to occur | |
844 | * @dd: the infinipath device | |
845 | * @state: the state to wait for | |
846 | * @msecs: the number of milliseconds to wait | |
847 | * | |
848 | * wait up to msecs milliseconds for IB link state change to occur for | |
849 | * now, take the easy polling route. Currently used only by | |
34b2aafe | 850 | * ipath_set_linkstate. Returns 0 if state reached, otherwise |
7bb206e3 BS |
851 | * -ETIMEDOUT state can have multiple states set, for any of several |
852 | * transitions. | |
853 | */ | |
140277e9 | 854 | int ipath_wait_linkstate(struct ipath_devdata *dd, u32 state, int msecs) |
7bb206e3 | 855 | { |
0fd41363 BS |
856 | dd->ipath_state_wanted = state; |
857 | wait_event_interruptible_timeout(ipath_state_wait, | |
7bb206e3 BS |
858 | (dd->ipath_flags & state), |
859 | msecs_to_jiffies(msecs)); | |
0fd41363 | 860 | dd->ipath_state_wanted = 0; |
7bb206e3 BS |
861 | |
862 | if (!(dd->ipath_flags & state)) { | |
863 | u64 val; | |
0fd41363 BS |
864 | ipath_cdbg(VERBOSE, "Didn't reach linkstate %s within %u" |
865 | " ms\n", | |
7bb206e3 BS |
866 | /* test INIT ahead of DOWN, both can be set */ |
867 | (state & IPATH_LINKINIT) ? "INIT" : | |
868 | ((state & IPATH_LINKDOWN) ? "DOWN" : | |
869 | ((state & IPATH_LINKARMED) ? "ARM" : "ACTIVE")), | |
870 | msecs); | |
871 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); | |
872 | ipath_cdbg(VERBOSE, "ibcc=%llx ibcstatus=%llx (%s)\n", | |
873 | (unsigned long long) ipath_read_kreg64( | |
874 | dd, dd->ipath_kregs->kr_ibcctrl), | |
875 | (unsigned long long) val, | |
bb917144 | 876 | ipath_ibcstatus_str[val & dd->ibcs_lts_mask]); |
7bb206e3 BS |
877 | } |
878 | return (dd->ipath_flags & state) ? 0 : -ETIMEDOUT; | |
879 | } | |
880 | ||
124b4dcb DO |
881 | static void decode_sdma_errs(struct ipath_devdata *dd, ipath_err_t err, |
882 | char *buf, size_t blen) | |
883 | { | |
884 | static const struct { | |
885 | ipath_err_t err; | |
886 | const char *msg; | |
887 | } errs[] = { | |
888 | { INFINIPATH_E_SDMAGENMISMATCH, "SDmaGenMismatch" }, | |
889 | { INFINIPATH_E_SDMAOUTOFBOUND, "SDmaOutOfBound" }, | |
890 | { INFINIPATH_E_SDMATAILOUTOFBOUND, "SDmaTailOutOfBound" }, | |
891 | { INFINIPATH_E_SDMABASE, "SDmaBase" }, | |
892 | { INFINIPATH_E_SDMA1STDESC, "SDma1stDesc" }, | |
893 | { INFINIPATH_E_SDMARPYTAG, "SDmaRpyTag" }, | |
894 | { INFINIPATH_E_SDMADWEN, "SDmaDwEn" }, | |
895 | { INFINIPATH_E_SDMAMISSINGDW, "SDmaMissingDw" }, | |
896 | { INFINIPATH_E_SDMAUNEXPDATA, "SDmaUnexpData" }, | |
897 | { INFINIPATH_E_SDMADESCADDRMISALIGN, "SDmaDescAddrMisalign" }, | |
898 | { INFINIPATH_E_SENDBUFMISUSE, "SendBufMisuse" }, | |
899 | { INFINIPATH_E_SDMADISABLED, "SDmaDisabled" }, | |
900 | }; | |
901 | int i; | |
902 | int expected; | |
903 | size_t bidx = 0; | |
904 | ||
905 | for (i = 0; i < ARRAY_SIZE(errs); i++) { | |
906 | expected = (errs[i].err != INFINIPATH_E_SDMADISABLED) ? 0 : | |
907 | test_bit(IPATH_SDMA_ABORTING, &dd->ipath_sdma_status); | |
908 | if ((err & errs[i].err) && !expected) | |
909 | bidx += snprintf(buf + bidx, blen - bidx, | |
910 | "%s ", errs[i].msg); | |
911 | } | |
912 | } | |
913 | ||
8ec1077b BS |
914 | /* |
915 | * Decode the error status into strings, deciding whether to always | |
916 | * print * it or not depending on "normal packet errors" vs everything | |
917 | * else. Return 1 if "real" errors, otherwise 0 if only packet | |
918 | * errors, so caller can decide what to print with the string. | |
919 | */ | |
124b4dcb DO |
920 | int ipath_decode_err(struct ipath_devdata *dd, char *buf, size_t blen, |
921 | ipath_err_t err) | |
7bb206e3 | 922 | { |
8ec1077b | 923 | int iserr = 1; |
7bb206e3 | 924 | *buf = '\0'; |
8ec1077b BS |
925 | if (err & INFINIPATH_E_PKTERRS) { |
926 | if (!(err & ~INFINIPATH_E_PKTERRS)) | |
927 | iserr = 0; // if only packet errors. | |
928 | if (ipath_debug & __IPATH_ERRPKTDBG) { | |
929 | if (err & INFINIPATH_E_REBP) | |
930 | strlcat(buf, "EBP ", blen); | |
931 | if (err & INFINIPATH_E_RVCRC) | |
932 | strlcat(buf, "VCRC ", blen); | |
933 | if (err & INFINIPATH_E_RICRC) { | |
934 | strlcat(buf, "CRC ", blen); | |
935 | // clear for check below, so only once | |
936 | err &= INFINIPATH_E_RICRC; | |
937 | } | |
938 | if (err & INFINIPATH_E_RSHORTPKTLEN) | |
939 | strlcat(buf, "rshortpktlen ", blen); | |
940 | if (err & INFINIPATH_E_SDROPPEDDATAPKT) | |
941 | strlcat(buf, "sdroppeddatapkt ", blen); | |
942 | if (err & INFINIPATH_E_SPKTLEN) | |
943 | strlcat(buf, "spktlen ", blen); | |
944 | } | |
945 | if ((err & INFINIPATH_E_RICRC) && | |
946 | !(err&(INFINIPATH_E_RVCRC|INFINIPATH_E_REBP))) | |
947 | strlcat(buf, "CRC ", blen); | |
948 | if (!iserr) | |
949 | goto done; | |
950 | } | |
7bb206e3 BS |
951 | if (err & INFINIPATH_E_RHDRLEN) |
952 | strlcat(buf, "rhdrlen ", blen); | |
953 | if (err & INFINIPATH_E_RBADTID) | |
954 | strlcat(buf, "rbadtid ", blen); | |
955 | if (err & INFINIPATH_E_RBADVERSION) | |
956 | strlcat(buf, "rbadversion ", blen); | |
957 | if (err & INFINIPATH_E_RHDR) | |
958 | strlcat(buf, "rhdr ", blen); | |
bb917144 AJ |
959 | if (err & INFINIPATH_E_SENDSPECIALTRIGGER) |
960 | strlcat(buf, "sendspecialtrigger ", blen); | |
7bb206e3 BS |
961 | if (err & INFINIPATH_E_RLONGPKTLEN) |
962 | strlcat(buf, "rlongpktlen ", blen); | |
7bb206e3 BS |
963 | if (err & INFINIPATH_E_RMAXPKTLEN) |
964 | strlcat(buf, "rmaxpktlen ", blen); | |
965 | if (err & INFINIPATH_E_RMINPKTLEN) | |
966 | strlcat(buf, "rminpktlen ", blen); | |
8ec1077b BS |
967 | if (err & INFINIPATH_E_SMINPKTLEN) |
968 | strlcat(buf, "sminpktlen ", blen); | |
7bb206e3 BS |
969 | if (err & INFINIPATH_E_RFORMATERR) |
970 | strlcat(buf, "rformaterr ", blen); | |
971 | if (err & INFINIPATH_E_RUNSUPVL) | |
972 | strlcat(buf, "runsupvl ", blen); | |
973 | if (err & INFINIPATH_E_RUNEXPCHAR) | |
974 | strlcat(buf, "runexpchar ", blen); | |
975 | if (err & INFINIPATH_E_RIBFLOW) | |
976 | strlcat(buf, "ribflow ", blen); | |
7bb206e3 BS |
977 | if (err & INFINIPATH_E_SUNDERRUN) |
978 | strlcat(buf, "sunderrun ", blen); | |
979 | if (err & INFINIPATH_E_SPIOARMLAUNCH) | |
980 | strlcat(buf, "spioarmlaunch ", blen); | |
981 | if (err & INFINIPATH_E_SUNEXPERRPKTNUM) | |
982 | strlcat(buf, "sunexperrpktnum ", blen); | |
7bb206e3 BS |
983 | if (err & INFINIPATH_E_SDROPPEDSMPPKT) |
984 | strlcat(buf, "sdroppedsmppkt ", blen); | |
985 | if (err & INFINIPATH_E_SMAXPKTLEN) | |
986 | strlcat(buf, "smaxpktlen ", blen); | |
7bb206e3 BS |
987 | if (err & INFINIPATH_E_SUNSUPVL) |
988 | strlcat(buf, "sunsupVL ", blen); | |
7bb206e3 BS |
989 | if (err & INFINIPATH_E_INVALIDADDR) |
990 | strlcat(buf, "invalidaddr ", blen); | |
7bb206e3 BS |
991 | if (err & INFINIPATH_E_RRCVEGRFULL) |
992 | strlcat(buf, "rcvegrfull ", blen); | |
993 | if (err & INFINIPATH_E_RRCVHDRFULL) | |
994 | strlcat(buf, "rcvhdrfull ", blen); | |
995 | if (err & INFINIPATH_E_IBSTATUSCHANGED) | |
996 | strlcat(buf, "ibcstatuschg ", blen); | |
997 | if (err & INFINIPATH_E_RIBLOSTLINK) | |
998 | strlcat(buf, "riblostlink ", blen); | |
999 | if (err & INFINIPATH_E_HARDWARE) | |
1000 | strlcat(buf, "hardware ", blen); | |
1001 | if (err & INFINIPATH_E_RESET) | |
1002 | strlcat(buf, "reset ", blen); | |
124b4dcb DO |
1003 | if (err & INFINIPATH_E_SDMAERRS) |
1004 | decode_sdma_errs(dd, err, buf, blen); | |
bb917144 AJ |
1005 | if (err & INFINIPATH_E_INVALIDEEPCMD) |
1006 | strlcat(buf, "invalideepromcmd ", blen); | |
8ec1077b BS |
1007 | done: |
1008 | return iserr; | |
7bb206e3 BS |
1009 | } |
1010 | ||
1011 | /** | |
1012 | * get_rhf_errstring - decode RHF errors | |
1013 | * @err: the err number | |
1014 | * @msg: the output buffer | |
1015 | * @len: the length of the output buffer | |
1016 | * | |
1017 | * only used one place now, may want more later | |
1018 | */ | |
1019 | static void get_rhf_errstring(u32 err, char *msg, size_t len) | |
1020 | { | |
1021 | /* if no errors, and so don't need to check what's first */ | |
1022 | *msg = '\0'; | |
1023 | ||
1024 | if (err & INFINIPATH_RHF_H_ICRCERR) | |
1025 | strlcat(msg, "icrcerr ", len); | |
1026 | if (err & INFINIPATH_RHF_H_VCRCERR) | |
1027 | strlcat(msg, "vcrcerr ", len); | |
1028 | if (err & INFINIPATH_RHF_H_PARITYERR) | |
1029 | strlcat(msg, "parityerr ", len); | |
1030 | if (err & INFINIPATH_RHF_H_LENERR) | |
1031 | strlcat(msg, "lenerr ", len); | |
1032 | if (err & INFINIPATH_RHF_H_MTUERR) | |
1033 | strlcat(msg, "mtuerr ", len); | |
1034 | if (err & INFINIPATH_RHF_H_IHDRERR) | |
1035 | /* infinipath hdr checksum error */ | |
1036 | strlcat(msg, "ipathhdrerr ", len); | |
1037 | if (err & INFINIPATH_RHF_H_TIDERR) | |
1038 | strlcat(msg, "tiderr ", len); | |
1039 | if (err & INFINIPATH_RHF_H_MKERR) | |
1040 | /* bad port, offset, etc. */ | |
1041 | strlcat(msg, "invalid ipathhdr ", len); | |
1042 | if (err & INFINIPATH_RHF_H_IBERR) | |
1043 | strlcat(msg, "iberr ", len); | |
1044 | if (err & INFINIPATH_RHF_L_SWA) | |
1045 | strlcat(msg, "swA ", len); | |
1046 | if (err & INFINIPATH_RHF_L_SWB) | |
1047 | strlcat(msg, "swB ", len); | |
1048 | } | |
1049 | ||
1050 | /** | |
1051 | * ipath_get_egrbuf - get an eager buffer | |
1052 | * @dd: the infinipath device | |
1053 | * @bufnum: the eager buffer to get | |
7bb206e3 BS |
1054 | * |
1055 | * must only be called if ipath_pd[port] is known to be allocated | |
1056 | */ | |
d65708f3 | 1057 | static inline void *ipath_get_egrbuf(struct ipath_devdata *dd, u32 bufnum) |
7bb206e3 | 1058 | { |
1fd3b40f BS |
1059 | return dd->ipath_port0_skbinfo ? |
1060 | (void *) dd->ipath_port0_skbinfo[bufnum].skb->data : NULL; | |
7bb206e3 BS |
1061 | } |
1062 | ||
1063 | /** | |
1064 | * ipath_alloc_skb - allocate an skb and buffer with possible constraints | |
1065 | * @dd: the infinipath device | |
1066 | * @gfp_mask: the sk_buff SFP mask | |
1067 | */ | |
1068 | struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, | |
1069 | gfp_t gfp_mask) | |
1070 | { | |
1071 | struct sk_buff *skb; | |
1072 | u32 len; | |
1073 | ||
1074 | /* | |
1075 | * Only fully supported way to handle this is to allocate lots | |
1076 | * extra, align as needed, and then do skb_reserve(). That wastes | |
1077 | * a lot of memory... I'll have to hack this into infinipath_copy | |
1078 | * also. | |
1079 | */ | |
1080 | ||
1081 | /* | |
1fd3b40f BS |
1082 | * We need 2 extra bytes for ipath_ether data sent in the |
1083 | * key header. In order to keep everything dword aligned, | |
1084 | * we'll reserve 4 bytes. | |
7bb206e3 | 1085 | */ |
1fd3b40f BS |
1086 | len = dd->ipath_ibmaxlen + 4; |
1087 | ||
7bb206e3 | 1088 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
1fd3b40f | 1089 | /* We need a 2KB multiple alignment, and there is no way |
7bb206e3 BS |
1090 | * to do it except to allocate extra and then skb_reserve |
1091 | * enough to bring it up to the right alignment. | |
1092 | */ | |
1fd3b40f | 1093 | len += 2047; |
7bb206e3 | 1094 | } |
1fd3b40f | 1095 | |
7bb206e3 BS |
1096 | skb = __dev_alloc_skb(len, gfp_mask); |
1097 | if (!skb) { | |
1098 | ipath_dev_err(dd, "Failed to allocate skbuff, length %u\n", | |
1099 | len); | |
1100 | goto bail; | |
1101 | } | |
1fd3b40f BS |
1102 | |
1103 | skb_reserve(skb, 4); | |
1104 | ||
7bb206e3 | 1105 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
1fd3b40f | 1106 | u32 una = (unsigned long)skb->data & 2047; |
7bb206e3 | 1107 | if (una) |
1fd3b40f BS |
1108 | skb_reserve(skb, 2048 - una); |
1109 | } | |
7bb206e3 BS |
1110 | |
1111 | bail: | |
1112 | return skb; | |
1113 | } | |
1114 | ||
3d37b9e2 RC |
1115 | static void ipath_rcv_hdrerr(struct ipath_devdata *dd, |
1116 | u32 eflags, | |
1117 | u32 l, | |
1118 | u32 etail, | |
9355fb6a RC |
1119 | __le32 *rhf_addr, |
1120 | struct ipath_message_header *hdr) | |
3d37b9e2 RC |
1121 | { |
1122 | char emsg[128]; | |
3d37b9e2 RC |
1123 | |
1124 | get_rhf_errstring(eflags, emsg, sizeof emsg); | |
3d37b9e2 RC |
1125 | ipath_cdbg(PKT, "RHFerrs %x hdrqtail=%x typ=%u " |
1126 | "tlen=%x opcode=%x egridx=%x: %s\n", | |
1127 | eflags, l, | |
9355fb6a RC |
1128 | ipath_hdrget_rcv_type(rhf_addr), |
1129 | ipath_hdrget_length_in_bytes(rhf_addr), | |
3d37b9e2 RC |
1130 | be32_to_cpu(hdr->bth[0]) >> 24, |
1131 | etail, emsg); | |
1132 | ||
1133 | /* Count local link integrity errors. */ | |
1134 | if (eflags & (INFINIPATH_RHF_H_ICRCERR | INFINIPATH_RHF_H_VCRCERR)) { | |
1135 | u8 n = (dd->ipath_ibcctrl >> | |
1136 | INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) & | |
1137 | INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK; | |
1138 | ||
1139 | if (++dd->ipath_lli_counter > n) { | |
1140 | dd->ipath_lli_counter = 0; | |
1141 | dd->ipath_lli_errors++; | |
1142 | } | |
1143 | } | |
1144 | } | |
1145 | ||
7bb206e3 BS |
1146 | /* |
1147 | * ipath_kreceive - receive a packet | |
c59a80ac | 1148 | * @pd: the infinipath port |
7bb206e3 BS |
1149 | * |
1150 | * called from interrupt handler for errors or receive interrupt | |
1151 | */ | |
c59a80ac | 1152 | void ipath_kreceive(struct ipath_portdata *pd) |
7bb206e3 | 1153 | { |
c59a80ac | 1154 | struct ipath_devdata *dd = pd->port_dd; |
9355fb6a | 1155 | __le32 *rhf_addr; |
7bb206e3 BS |
1156 | void *ebuf; |
1157 | const u32 rsize = dd->ipath_rcvhdrentsize; /* words */ | |
1158 | const u32 maxcnt = dd->ipath_rcvhdrcnt * rsize; /* words */ | |
1159 | u32 etail = -1, l, hdrqtail; | |
27b678dd | 1160 | struct ipath_message_header *hdr; |
9355fb6a | 1161 | u32 eflags, i, etype, tlen, pkttot = 0, updegr = 0, reloop = 0; |
7bb206e3 | 1162 | static u64 totcalls; /* stats, may eventually remove */ |
9355fb6a | 1163 | int last; |
7bb206e3 | 1164 | |
c59a80ac | 1165 | l = pd->port_head; |
9355fb6a RC |
1166 | rhf_addr = (__le32 *) pd->port_rcvhdrq + l + dd->ipath_rhf_offset; |
1167 | if (dd->ipath_flags & IPATH_NODMA_RTAIL) { | |
1168 | u32 seq = ipath_hdrget_seq(rhf_addr); | |
7bb206e3 | 1169 | |
9355fb6a RC |
1170 | if (seq != pd->port_seq_cnt) |
1171 | goto bail; | |
1172 | hdrqtail = 0; | |
1173 | } else { | |
1174 | hdrqtail = ipath_get_rcvhdrtail(pd); | |
1175 | if (l == hdrqtail) | |
1176 | goto bail; | |
1177 | smp_rmb(); | |
1178 | } | |
7bb206e3 | 1179 | |
9355fb6a | 1180 | reloop: |
2889d1ef | 1181 | for (last = 0, i = 1; !last; i += !last) { |
9355fb6a RC |
1182 | hdr = dd->ipath_f_get_msgheader(dd, rhf_addr); |
1183 | eflags = ipath_hdrget_err_flags(rhf_addr); | |
1184 | etype = ipath_hdrget_rcv_type(rhf_addr); | |
7bb206e3 | 1185 | /* total length */ |
9355fb6a | 1186 | tlen = ipath_hdrget_length_in_bytes(rhf_addr); |
7bb206e3 | 1187 | ebuf = NULL; |
9355fb6a RC |
1188 | if ((dd->ipath_flags & IPATH_NODMA_RTAIL) ? |
1189 | ipath_hdrget_use_egr_buf(rhf_addr) : | |
1190 | (etype != RCVHQ_RCV_TYPE_EXPECTED)) { | |
7bb206e3 | 1191 | /* |
9355fb6a | 1192 | * It turns out that the chip uses an eager buffer |
7bb206e3 BS |
1193 | * for all non-expected packets, whether it "needs" |
1194 | * one or not. So always get the index, but don't | |
1195 | * set ebuf (so we try to copy data) unless the | |
1196 | * length requires it. | |
1197 | */ | |
9355fb6a RC |
1198 | etail = ipath_hdrget_index(rhf_addr); |
1199 | updegr = 1; | |
7bb206e3 BS |
1200 | if (tlen > sizeof(*hdr) || |
1201 | etype == RCVHQ_RCV_TYPE_NON_KD) | |
d65708f3 | 1202 | ebuf = ipath_get_egrbuf(dd, etail); |
7bb206e3 BS |
1203 | } |
1204 | ||
1205 | /* | |
1206 | * both tiderr and ipathhdrerr are set for all plain IB | |
1207 | * packets; only ipathhdrerr should be set. | |
1208 | */ | |
1209 | ||
9355fb6a RC |
1210 | if (etype != RCVHQ_RCV_TYPE_NON_KD && |
1211 | etype != RCVHQ_RCV_TYPE_ERROR && | |
1212 | ipath_hdrget_ipath_ver(hdr->iph.ver_port_tid_offset) != | |
1213 | IPS_PROTO_VERSION) | |
7bb206e3 BS |
1214 | ipath_cdbg(PKT, "Bad InfiniPath protocol version " |
1215 | "%x\n", etype); | |
7bb206e3 | 1216 | |
3d37b9e2 | 1217 | if (unlikely(eflags)) |
9355fb6a | 1218 | ipath_rcv_hdrerr(dd, eflags, l, etail, rhf_addr, hdr); |
3d37b9e2 | 1219 | else if (etype == RCVHQ_RCV_TYPE_NON_KD) { |
9355fb6a | 1220 | ipath_ib_rcv(dd->verbs_dev, (u32 *)hdr, ebuf, tlen); |
34b2aafe BS |
1221 | if (dd->ipath_lli_counter) |
1222 | dd->ipath_lli_counter--; | |
9355fb6a RC |
1223 | } else if (etype == RCVHQ_RCV_TYPE_EAGER) { |
1224 | u8 opcode = be32_to_cpu(hdr->bth[0]) >> 24; | |
1225 | u32 qp = be32_to_cpu(hdr->bth[1]) & 0xffffff; | |
34b2aafe BS |
1226 | ipath_cdbg(PKT, "typ %x, opcode %x (eager, " |
1227 | "qp=%x), len %x; ignored\n", | |
9355fb6a | 1228 | etype, opcode, qp, tlen); |
63417188 | 1229 | } else if (etype == RCVHQ_RCV_TYPE_EXPECTED) { |
7bb206e3 | 1230 | ipath_dbg("Bug: Expected TID, opcode %x; ignored\n", |
9355fb6a | 1231 | be32_to_cpu(hdr->bth[0]) >> 24); |
63417188 | 1232 | } else { |
7bb206e3 | 1233 | /* |
9e2ef36b | 1234 | * error packet, type of error unknown. |
7bb206e3 BS |
1235 | * Probably type 3, but we don't know, so don't |
1236 | * even try to print the opcode, etc. | |
9355fb6a RC |
1237 | * Usually caused by a "bad packet", that has no |
1238 | * BTH, when the LRH says it should. | |
7bb206e3 | 1239 | */ |
9355fb6a RC |
1240 | ipath_cdbg(ERRPKT, "Error Pkt, but no eflags! egrbuf" |
1241 | " %x, len %x hdrq+%x rhf: %Lx\n", | |
70117b9e | 1242 | etail, tlen, l, (unsigned long long) |
9355fb6a RC |
1243 | le64_to_cpu(*(__le64 *) rhf_addr)); |
1244 | if (ipath_debug & __IPATH_ERRPKTDBG) { | |
1245 | u32 j, *d, dw = rsize-2; | |
1246 | if (rsize > (tlen>>2)) | |
1247 | dw = tlen>>2; | |
1248 | d = (u32 *)hdr; | |
1249 | printk(KERN_DEBUG "EPkt rcvhdr(%x dw):\n", | |
1250 | dw); | |
1251 | for (j = 0; j < dw; j++) | |
1252 | printk(KERN_DEBUG "%8x%s", d[j], | |
1253 | (j%8) == 7 ? "\n" : " "); | |
1254 | printk(KERN_DEBUG ".\n"); | |
1255 | } | |
7bb206e3 BS |
1256 | } |
1257 | l += rsize; | |
1258 | if (l >= maxcnt) | |
1259 | l = 0; | |
9355fb6a RC |
1260 | rhf_addr = (__le32 *) pd->port_rcvhdrq + |
1261 | l + dd->ipath_rhf_offset; | |
1262 | if (dd->ipath_flags & IPATH_NODMA_RTAIL) { | |
1263 | u32 seq = ipath_hdrget_seq(rhf_addr); | |
1264 | ||
1265 | if (++pd->port_seq_cnt > 13) | |
1266 | pd->port_seq_cnt = 1; | |
1267 | if (seq != pd->port_seq_cnt) | |
1268 | last = 1; | |
63417188 | 1269 | } else if (l == hdrqtail) { |
9355fb6a | 1270 | last = 1; |
63417188 | 1271 | } |
7bb206e3 | 1272 | /* |
f5f99929 BS |
1273 | * update head regs on last packet, and every 16 packets. |
1274 | * Reduce bus traffic, while still trying to prevent | |
1275 | * rcvhdrq overflows, for when the queue is nearly full | |
7bb206e3 | 1276 | */ |
9355fb6a RC |
1277 | if (last || !(i & 0xf)) { |
1278 | u64 lval = l; | |
1279 | ||
1280 | /* request IBA6120 and 7220 interrupt only on last */ | |
1281 | if (last) | |
1282 | lval |= dd->ipath_rhdrhead_intr_off; | |
1283 | ipath_write_ureg(dd, ur_rcvhdrhead, lval, | |
1284 | pd->port_port); | |
f5f99929 | 1285 | if (updegr) { |
8c641d4b | 1286 | ipath_write_ureg(dd, ur_rcvegrindexhead, |
9355fb6a | 1287 | etail, pd->port_port); |
f5f99929 BS |
1288 | updegr = 0; |
1289 | } | |
1290 | } | |
7bb206e3 BS |
1291 | } |
1292 | ||
9355fb6a RC |
1293 | if (!dd->ipath_rhdrhead_intr_off && !reloop && |
1294 | !(dd->ipath_flags & IPATH_NODMA_RTAIL)) { | |
525d0ca1 | 1295 | /* IBA6110 workaround; we can have a race clearing chip |
57abad25 BS |
1296 | * interrupt with another interrupt about to be delivered, |
1297 | * and can clear it before it is delivered on the GPIO | |
1298 | * workaround. By doing the extra check here for the | |
1299 | * in-memory tail register updating while we were doing | |
1300 | * earlier packets, we "almost" guarantee we have covered | |
1301 | * that case. | |
1302 | */ | |
c59a80ac | 1303 | u32 hqtail = ipath_get_rcvhdrtail(pd); |
57abad25 BS |
1304 | if (hqtail != hdrqtail) { |
1305 | hdrqtail = hqtail; | |
1306 | reloop = 1; /* loop 1 extra time at most */ | |
1307 | goto reloop; | |
1308 | } | |
1309 | } | |
1310 | ||
7bb206e3 BS |
1311 | pkttot += i; |
1312 | ||
c59a80ac | 1313 | pd->port_head = l; |
7bb206e3 | 1314 | |
7bb206e3 BS |
1315 | if (pkttot > ipath_stats.sps_maxpkts_call) |
1316 | ipath_stats.sps_maxpkts_call = pkttot; | |
1317 | ipath_stats.sps_port0pkts += pkttot; | |
1318 | ipath_stats.sps_avgpkts_call = | |
1319 | ipath_stats.sps_port0pkts / ++totcalls; | |
1320 | ||
7bb206e3 BS |
1321 | bail:; |
1322 | } | |
1323 | ||
1324 | /** | |
1325 | * ipath_update_pio_bufs - update shadow copy of the PIO availability map | |
1326 | * @dd: the infinipath device | |
1327 | * | |
1328 | * called whenever our local copy indicates we have run out of send buffers | |
1329 | * NOTE: This can be called from interrupt context by some code | |
1330 | * and from non-interrupt context by ipath_getpiobuf(). | |
1331 | */ | |
1332 | ||
1333 | static void ipath_update_pio_bufs(struct ipath_devdata *dd) | |
1334 | { | |
1335 | unsigned long flags; | |
1336 | int i; | |
1337 | const unsigned piobregs = (unsigned)dd->ipath_pioavregs; | |
1338 | ||
1339 | /* If the generation (check) bits have changed, then we update the | |
1340 | * busy bit for the corresponding PIO buffer. This algorithm will | |
1341 | * modify positions to the value they already have in some cases | |
1342 | * (i.e., no change), but it's faster than changing only the bits | |
1343 | * that have changed. | |
1344 | * | |
1345 | * We would like to do this atomicly, to avoid spinlocks in the | |
1346 | * critical send path, but that's not really possible, given the | |
1347 | * type of changes, and that this routine could be called on | |
1348 | * multiple cpu's simultaneously, so we lock in this routine only, | |
1349 | * to avoid conflicting updates; all we change is the shadow, and | |
1350 | * it's a single 64 bit memory location, so by definition the update | |
1351 | * is atomic in terms of what other cpu's can see in testing the | |
1352 | * bits. The spin_lock overhead isn't too bad, since it only | |
1353 | * happens when all buffers are in use, so only cpu overhead, not | |
1354 | * latency or bandwidth is affected. | |
1355 | */ | |
7bb206e3 BS |
1356 | if (!dd->ipath_pioavailregs_dma) { |
1357 | ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n"); | |
1358 | return; | |
1359 | } | |
1360 | if (ipath_debug & __IPATH_VERBDBG) { | |
1361 | /* only if packet debug and verbose */ | |
1362 | volatile __le64 *dma = dd->ipath_pioavailregs_dma; | |
1363 | unsigned long *shadow = dd->ipath_pioavailshadow; | |
1364 | ||
1365 | ipath_cdbg(PKT, "Refill avail, dma0=%llx shad0=%lx, " | |
1366 | "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx " | |
1367 | "s3=%lx\n", | |
1368 | (unsigned long long) le64_to_cpu(dma[0]), | |
1369 | shadow[0], | |
1370 | (unsigned long long) le64_to_cpu(dma[1]), | |
1371 | shadow[1], | |
1372 | (unsigned long long) le64_to_cpu(dma[2]), | |
1373 | shadow[2], | |
1374 | (unsigned long long) le64_to_cpu(dma[3]), | |
1375 | shadow[3]); | |
1376 | if (piobregs > 4) | |
1377 | ipath_cdbg( | |
1378 | PKT, "2nd group, dma4=%llx shad4=%lx, " | |
1379 | "d5=%llx s5=%lx, d6=%llx s6=%lx, " | |
1380 | "d7=%llx s7=%lx\n", | |
1381 | (unsigned long long) le64_to_cpu(dma[4]), | |
1382 | shadow[4], | |
1383 | (unsigned long long) le64_to_cpu(dma[5]), | |
1384 | shadow[5], | |
1385 | (unsigned long long) le64_to_cpu(dma[6]), | |
1386 | shadow[6], | |
1387 | (unsigned long long) le64_to_cpu(dma[7]), | |
1388 | shadow[7]); | |
1389 | } | |
1390 | spin_lock_irqsave(&ipath_pioavail_lock, flags); | |
1391 | for (i = 0; i < piobregs; i++) { | |
1392 | u64 pchbusy, pchg, piov, pnew; | |
1393 | /* | |
1394 | * Chip Errata: bug 6641; even and odd qwords>3 are swapped | |
1395 | */ | |
4ea61b54 RC |
1396 | if (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) |
1397 | piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i ^ 1]); | |
1398 | else | |
7bb206e3 | 1399 | piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i]); |
c4b4d16e | 1400 | pchg = dd->ipath_pioavailkernel[i] & |
7bb206e3 BS |
1401 | ~(dd->ipath_pioavailshadow[i] ^ piov); |
1402 | pchbusy = pchg << INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT; | |
1403 | if (pchg && (pchbusy & dd->ipath_pioavailshadow[i])) { | |
1404 | pnew = dd->ipath_pioavailshadow[i] & ~pchbusy; | |
1405 | pnew |= piov & pchbusy; | |
1406 | dd->ipath_pioavailshadow[i] = pnew; | |
1407 | } | |
1408 | } | |
1409 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); | |
1410 | } | |
1411 | ||
e2ab41ca DO |
1412 | /* |
1413 | * used to force update of pioavailshadow if we can't get a pio buffer. | |
1414 | * Needed primarily due to exitting freeze mode after recovering | |
1415 | * from errors. Done lazily, because it's safer (known to not | |
1416 | * be writing pio buffers). | |
1417 | */ | |
1418 | static void ipath_reset_availshadow(struct ipath_devdata *dd) | |
1419 | { | |
1420 | int i, im; | |
1421 | unsigned long flags; | |
1422 | ||
1423 | spin_lock_irqsave(&ipath_pioavail_lock, flags); | |
1424 | for (i = 0; i < dd->ipath_pioavregs; i++) { | |
1425 | u64 val, oldval; | |
1426 | /* deal with 6110 chip bug on high register #s */ | |
1427 | im = (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) ? | |
1428 | i ^ 1 : i; | |
1429 | val = le64_to_cpu(dd->ipath_pioavailregs_dma[im]); | |
1430 | /* | |
1431 | * busy out the buffers not in the kernel avail list, | |
1432 | * without changing the generation bits. | |
1433 | */ | |
1434 | oldval = dd->ipath_pioavailshadow[i]; | |
1435 | dd->ipath_pioavailshadow[i] = val | | |
1436 | ((~dd->ipath_pioavailkernel[i] << | |
1437 | INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT) & | |
1438 | 0xaaaaaaaaaaaaaaaaULL); /* All BUSY bits in qword */ | |
1439 | if (oldval != dd->ipath_pioavailshadow[i]) | |
1440 | ipath_dbg("shadow[%d] was %Lx, now %lx\n", | |
70117b9e AB |
1441 | i, (unsigned long long) oldval, |
1442 | dd->ipath_pioavailshadow[i]); | |
e2ab41ca DO |
1443 | } |
1444 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); | |
1445 | } | |
1446 | ||
7bb206e3 BS |
1447 | /** |
1448 | * ipath_setrcvhdrsize - set the receive header size | |
1449 | * @dd: the infinipath device | |
1450 | * @rhdrsize: the receive header size | |
1451 | * | |
1452 | * called from user init code, and also layered driver init | |
1453 | */ | |
1454 | int ipath_setrcvhdrsize(struct ipath_devdata *dd, unsigned rhdrsize) | |
1455 | { | |
1456 | int ret = 0; | |
1457 | ||
1458 | if (dd->ipath_flags & IPATH_RCVHDRSZ_SET) { | |
1459 | if (dd->ipath_rcvhdrsize != rhdrsize) { | |
1460 | dev_info(&dd->pcidev->dev, | |
1461 | "Error: can't set protocol header " | |
1462 | "size %u, already %u\n", | |
1463 | rhdrsize, dd->ipath_rcvhdrsize); | |
1464 | ret = -EAGAIN; | |
1465 | } else | |
1466 | ipath_cdbg(VERBOSE, "Reuse same protocol header " | |
1467 | "size %u\n", dd->ipath_rcvhdrsize); | |
1468 | } else if (rhdrsize > (dd->ipath_rcvhdrentsize - | |
1469 | (sizeof(u64) / sizeof(u32)))) { | |
1470 | ipath_dbg("Error: can't set protocol header size %u " | |
1471 | "(> max %u)\n", rhdrsize, | |
1472 | dd->ipath_rcvhdrentsize - | |
1473 | (u32) (sizeof(u64) / sizeof(u32))); | |
1474 | ret = -EOVERFLOW; | |
1475 | } else { | |
1476 | dd->ipath_flags |= IPATH_RCVHDRSZ_SET; | |
1477 | dd->ipath_rcvhdrsize = rhdrsize; | |
1478 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize, | |
1479 | dd->ipath_rcvhdrsize); | |
1480 | ipath_cdbg(VERBOSE, "Set protocol header size to %u\n", | |
1481 | dd->ipath_rcvhdrsize); | |
1482 | } | |
1483 | return ret; | |
1484 | } | |
1485 | ||
c4b4d16e RC |
1486 | /* |
1487 | * debugging code and stats updates if no pio buffers available. | |
1488 | */ | |
1489 | static noinline void no_pio_bufs(struct ipath_devdata *dd) | |
1490 | { | |
1491 | unsigned long *shadow = dd->ipath_pioavailshadow; | |
1492 | __le64 *dma = (__le64 *)dd->ipath_pioavailregs_dma; | |
1493 | ||
1494 | dd->ipath_upd_pio_shadow = 1; | |
1495 | ||
1496 | /* | |
1497 | * not atomic, but if we lose a stat count in a while, that's OK | |
1498 | */ | |
1499 | ipath_stats.sps_nopiobufs++; | |
1500 | if (!(++dd->ipath_consec_nopiobuf % 100000)) { | |
e2ab41ca DO |
1501 | ipath_force_pio_avail_update(dd); /* at start */ |
1502 | ipath_dbg("%u tries no piobufavail ts%lx; dmacopy: " | |
1503 | "%llx %llx %llx %llx\n" | |
1504 | "ipath shadow: %lx %lx %lx %lx\n", | |
c4b4d16e | 1505 | dd->ipath_consec_nopiobuf, |
e2ab41ca | 1506 | (unsigned long)get_cycles(), |
c4b4d16e RC |
1507 | (unsigned long long) le64_to_cpu(dma[0]), |
1508 | (unsigned long long) le64_to_cpu(dma[1]), | |
1509 | (unsigned long long) le64_to_cpu(dma[2]), | |
1510 | (unsigned long long) le64_to_cpu(dma[3]), | |
1511 | shadow[0], shadow[1], shadow[2], shadow[3]); | |
1512 | /* | |
1513 | * 4 buffers per byte, 4 registers above, cover rest | |
1514 | * below | |
1515 | */ | |
1516 | if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) > | |
1517 | (sizeof(shadow[0]) * 4 * 4)) | |
e2ab41ca DO |
1518 | ipath_dbg("2nd group: dmacopy: " |
1519 | "%llx %llx %llx %llx\n" | |
1520 | "ipath shadow: %lx %lx %lx %lx\n", | |
c4b4d16e RC |
1521 | (unsigned long long)le64_to_cpu(dma[4]), |
1522 | (unsigned long long)le64_to_cpu(dma[5]), | |
1523 | (unsigned long long)le64_to_cpu(dma[6]), | |
1524 | (unsigned long long)le64_to_cpu(dma[7]), | |
e2ab41ca DO |
1525 | shadow[4], shadow[5], shadow[6], shadow[7]); |
1526 | ||
1527 | /* at end, so update likely happened */ | |
1528 | ipath_reset_availshadow(dd); | |
c4b4d16e RC |
1529 | } |
1530 | } | |
1531 | ||
1532 | /* | |
1533 | * common code for normal driver pio buffer allocation, and reserved | |
1534 | * allocation. | |
7bb206e3 BS |
1535 | * |
1536 | * do appropriate marking as busy, etc. | |
1537 | * returns buffer number if one found (>=0), negative number is error. | |
7bb206e3 | 1538 | */ |
c4b4d16e RC |
1539 | static u32 __iomem *ipath_getpiobuf_range(struct ipath_devdata *dd, |
1540 | u32 *pbufnum, u32 first, u32 last, u32 firsti) | |
7bb206e3 | 1541 | { |
c4b4d16e RC |
1542 | int i, j, updated = 0; |
1543 | unsigned piobcnt; | |
7bb206e3 BS |
1544 | unsigned long flags; |
1545 | unsigned long *shadow = dd->ipath_pioavailshadow; | |
1546 | u32 __iomem *buf; | |
1547 | ||
c4b4d16e | 1548 | piobcnt = last - first; |
7bb206e3 BS |
1549 | if (dd->ipath_upd_pio_shadow) { |
1550 | /* | |
1551 | * Minor optimization. If we had no buffers on last call, | |
1552 | * start out by doing the update; continue and do scan even | |
1553 | * if no buffers were updated, to be paranoid | |
1554 | */ | |
1555 | ipath_update_pio_bufs(dd); | |
c4b4d16e RC |
1556 | updated++; |
1557 | i = first; | |
7bb206e3 | 1558 | } else |
c4b4d16e | 1559 | i = firsti; |
7bb206e3 BS |
1560 | rescan: |
1561 | /* | |
1562 | * while test_and_set_bit() is atomic, we do that and then the | |
1563 | * change_bit(), and the pair is not. See if this is the cause | |
1564 | * of the remaining armlaunch errors. | |
1565 | */ | |
1566 | spin_lock_irqsave(&ipath_pioavail_lock, flags); | |
c4b4d16e RC |
1567 | for (j = 0; j < piobcnt; j++, i++) { |
1568 | if (i >= last) | |
1569 | i = first; | |
1570 | if (__test_and_set_bit((2 * i) + 1, shadow)) | |
7bb206e3 BS |
1571 | continue; |
1572 | /* flip generation bit */ | |
c4b4d16e | 1573 | __change_bit(2 * i, shadow); |
7bb206e3 BS |
1574 | break; |
1575 | } | |
1576 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); | |
1577 | ||
c4b4d16e | 1578 | if (j == piobcnt) { |
7bb206e3 | 1579 | if (!updated) { |
c4b4d16e RC |
1580 | /* |
1581 | * first time through; shadow exhausted, but may be | |
1582 | * buffers available, try an update and then rescan. | |
1583 | */ | |
7bb206e3 | 1584 | ipath_update_pio_bufs(dd); |
c4b4d16e RC |
1585 | updated++; |
1586 | i = first; | |
7bb206e3 | 1587 | goto rescan; |
c4b4d16e RC |
1588 | } else if (updated == 1 && piobcnt <= |
1589 | ((dd->ipath_sendctrl | |
1590 | >> INFINIPATH_S_UPDTHRESH_SHIFT) & | |
1591 | INFINIPATH_S_UPDTHRESH_MASK)) { | |
7bb206e3 | 1592 | /* |
c4b4d16e RC |
1593 | * for chips supporting and using the update |
1594 | * threshold we need to force an update of the | |
1595 | * in-memory copy if the count is less than the | |
1596 | * thershold, then check one more time. | |
7bb206e3 | 1597 | */ |
c4b4d16e RC |
1598 | ipath_force_pio_avail_update(dd); |
1599 | ipath_update_pio_bufs(dd); | |
1600 | updated++; | |
1601 | i = first; | |
1602 | goto rescan; | |
7bb206e3 | 1603 | } |
c4b4d16e RC |
1604 | |
1605 | no_pio_bufs(dd); | |
7bb206e3 | 1606 | buf = NULL; |
c4b4d16e RC |
1607 | } else { |
1608 | if (i < dd->ipath_piobcnt2k) | |
1609 | buf = (u32 __iomem *) (dd->ipath_pio2kbase + | |
1610 | i * dd->ipath_palign); | |
1611 | else | |
1612 | buf = (u32 __iomem *) | |
1613 | (dd->ipath_pio4kbase + | |
1614 | (i - dd->ipath_piobcnt2k) * dd->ipath_4kalign); | |
1615 | if (pbufnum) | |
1616 | *pbufnum = i; | |
7bb206e3 BS |
1617 | } |
1618 | ||
c4b4d16e RC |
1619 | return buf; |
1620 | } | |
7bb206e3 | 1621 | |
c4b4d16e RC |
1622 | /** |
1623 | * ipath_getpiobuf - find an available pio buffer | |
1624 | * @dd: the infinipath device | |
1625 | * @plen: the size of the PIO buffer needed in 32-bit words | |
1626 | * @pbufnum: the buffer number is placed here | |
1627 | */ | |
1628 | u32 __iomem *ipath_getpiobuf(struct ipath_devdata *dd, u32 plen, u32 *pbufnum) | |
1629 | { | |
1630 | u32 __iomem *buf; | |
1631 | u32 pnum, nbufs; | |
1632 | u32 first, lasti; | |
1633 | ||
1634 | if (plen + 1 >= IPATH_SMALLBUF_DWORDS) { | |
1635 | first = dd->ipath_piobcnt2k; | |
1636 | lasti = dd->ipath_lastpioindexl; | |
1637 | } else { | |
1638 | first = 0; | |
1639 | lasti = dd->ipath_lastpioindex; | |
1640 | } | |
1641 | nbufs = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k; | |
1642 | buf = ipath_getpiobuf_range(dd, &pnum, first, nbufs, lasti); | |
1643 | ||
1644 | if (buf) { | |
1645 | /* | |
1646 | * Set next starting place. It's just an optimization, | |
1647 | * it doesn't matter who wins on this, so no locking | |
1648 | */ | |
1649 | if (plen + 1 >= IPATH_SMALLBUF_DWORDS) | |
1650 | dd->ipath_lastpioindexl = pnum + 1; | |
1651 | else | |
1652 | dd->ipath_lastpioindex = pnum + 1; | |
1653 | if (dd->ipath_upd_pio_shadow) | |
1654 | dd->ipath_upd_pio_shadow = 0; | |
1655 | if (dd->ipath_consec_nopiobuf) | |
1656 | dd->ipath_consec_nopiobuf = 0; | |
1657 | ipath_cdbg(VERBOSE, "Return piobuf%u %uk @ %p\n", | |
1658 | pnum, (pnum < dd->ipath_piobcnt2k) ? 2 : 4, buf); | |
1659 | if (pbufnum) | |
1660 | *pbufnum = pnum; | |
1661 | ||
1662 | } | |
7bb206e3 BS |
1663 | return buf; |
1664 | } | |
1665 | ||
c4b4d16e RC |
1666 | /** |
1667 | * ipath_chg_pioavailkernel - change which send buffers are available for kernel | |
1668 | * @dd: the infinipath device | |
1669 | * @start: the starting send buffer number | |
1670 | * @len: the number of send buffers | |
1671 | * @avail: true if the buffers are available for kernel use, false otherwise | |
1672 | */ | |
1673 | void ipath_chg_pioavailkernel(struct ipath_devdata *dd, unsigned start, | |
1674 | unsigned len, int avail) | |
1675 | { | |
1676 | unsigned long flags; | |
598cb6f3 | 1677 | unsigned end, cnt = 0; |
c4b4d16e RC |
1678 | |
1679 | /* There are two bits per send buffer (busy and generation) */ | |
1680 | start *= 2; | |
e2ab41ca | 1681 | end = start + len * 2; |
c4b4d16e | 1682 | |
c4b4d16e | 1683 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
e2ab41ca | 1684 | /* Set or clear the busy bit in the shadow. */ |
c4b4d16e RC |
1685 | while (start < end) { |
1686 | if (avail) { | |
e2ab41ca DO |
1687 | unsigned long dma; |
1688 | int i, im; | |
1689 | /* | |
1690 | * the BUSY bit will never be set, because we disarm | |
1691 | * the user buffers before we hand them back to the | |
1692 | * kernel. We do have to make sure the generation | |
1693 | * bit is set correctly in shadow, since it could | |
1694 | * have changed many times while allocated to user. | |
1695 | * We can't use the bitmap functions on the full | |
1696 | * dma array because it is always little-endian, so | |
1697 | * we have to flip to host-order first. | |
1698 | * BITS_PER_LONG is slightly wrong, since it's | |
1699 | * always 64 bits per register in chip... | |
1700 | * We only work on 64 bit kernels, so that's OK. | |
1701 | */ | |
1702 | /* deal with 6110 chip bug on high register #s */ | |
1703 | i = start / BITS_PER_LONG; | |
1704 | im = (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) ? | |
1705 | i ^ 1 : i; | |
1706 | __clear_bit(INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT | |
1707 | + start, dd->ipath_pioavailshadow); | |
1708 | dma = (unsigned long) le64_to_cpu( | |
1709 | dd->ipath_pioavailregs_dma[im]); | |
1710 | if (test_bit((INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT | |
1711 | + start) % BITS_PER_LONG, &dma)) | |
1712 | __set_bit(INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT | |
1713 | + start, dd->ipath_pioavailshadow); | |
1714 | else | |
1715 | __clear_bit(INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT | |
1716 | + start, dd->ipath_pioavailshadow); | |
c4b4d16e RC |
1717 | __set_bit(start, dd->ipath_pioavailkernel); |
1718 | } else { | |
1719 | __set_bit(start + INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT, | |
1720 | dd->ipath_pioavailshadow); | |
1721 | __clear_bit(start, dd->ipath_pioavailkernel); | |
1722 | } | |
1723 | start += 2; | |
1724 | } | |
e2ab41ca DO |
1725 | |
1726 | if (dd->ipath_pioupd_thresh) { | |
1727 | end = 2 * (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k); | |
598cb6f3 | 1728 | cnt = bitmap_weight(dd->ipath_pioavailkernel, end); |
e2ab41ca | 1729 | } |
c4b4d16e | 1730 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
e2ab41ca DO |
1731 | |
1732 | /* | |
1733 | * When moving buffers from kernel to user, if number assigned to | |
1734 | * the user is less than the pio update threshold, and threshold | |
1735 | * is supported (cnt was computed > 0), drop the update threshold | |
1736 | * so we update at least once per allocated number of buffers. | |
1737 | * In any case, if the kernel buffers are less than the threshold, | |
1738 | * drop the threshold. We don't bother increasing it, having once | |
1739 | * decreased it, since it would typically just cycle back and forth. | |
1740 | * If we don't decrease below buffers in use, we can wait a long | |
1741 | * time for an update, until some other context uses PIO buffers. | |
1742 | */ | |
1743 | if (!avail && len < cnt) | |
1744 | cnt = len; | |
1745 | if (cnt < dd->ipath_pioupd_thresh) { | |
1746 | dd->ipath_pioupd_thresh = cnt; | |
1747 | ipath_dbg("Decreased pio update threshold to %u\n", | |
1748 | dd->ipath_pioupd_thresh); | |
1749 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); | |
1750 | dd->ipath_sendctrl &= ~(INFINIPATH_S_UPDTHRESH_MASK | |
1751 | << INFINIPATH_S_UPDTHRESH_SHIFT); | |
1752 | dd->ipath_sendctrl |= dd->ipath_pioupd_thresh | |
1753 | << INFINIPATH_S_UPDTHRESH_SHIFT; | |
1754 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, | |
1755 | dd->ipath_sendctrl); | |
1756 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); | |
1757 | } | |
c4b4d16e RC |
1758 | } |
1759 | ||
7bb206e3 BS |
1760 | /** |
1761 | * ipath_create_rcvhdrq - create a receive header queue | |
1762 | * @dd: the infinipath device | |
1763 | * @pd: the port data | |
1764 | * | |
f37bda92 BS |
1765 | * this must be contiguous memory (from an i/o perspective), and must be |
1766 | * DMA'able (which means for some systems, it will go through an IOMMU, | |
1767 | * or be forced into a low address range). | |
7bb206e3 BS |
1768 | */ |
1769 | int ipath_create_rcvhdrq(struct ipath_devdata *dd, | |
1770 | struct ipath_portdata *pd) | |
1771 | { | |
f37bda92 | 1772 | int ret = 0; |
7bb206e3 | 1773 | |
7bb206e3 | 1774 | if (!pd->port_rcvhdrq) { |
f37bda92 | 1775 | dma_addr_t phys_hdrqtail; |
7bb206e3 | 1776 | gfp_t gfp_flags = GFP_USER | __GFP_COMP; |
f37bda92 BS |
1777 | int amt = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * |
1778 | sizeof(u32), PAGE_SIZE); | |
7bb206e3 BS |
1779 | |
1780 | pd->port_rcvhdrq = dma_alloc_coherent( | |
1781 | &dd->pcidev->dev, amt, &pd->port_rcvhdrq_phys, | |
1782 | gfp_flags); | |
1783 | ||
1784 | if (!pd->port_rcvhdrq) { | |
1785 | ipath_dev_err(dd, "attempt to allocate %d bytes " | |
1786 | "for port %u rcvhdrq failed\n", | |
1787 | amt, pd->port_port); | |
1788 | ret = -ENOMEM; | |
1789 | goto bail; | |
1790 | } | |
9355fb6a RC |
1791 | |
1792 | if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) { | |
1793 | pd->port_rcvhdrtail_kvaddr = dma_alloc_coherent( | |
1794 | &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail, | |
1795 | GFP_KERNEL); | |
1796 | if (!pd->port_rcvhdrtail_kvaddr) { | |
1797 | ipath_dev_err(dd, "attempt to allocate 1 page " | |
1798 | "for port %u rcvhdrqtailaddr " | |
1799 | "failed\n", pd->port_port); | |
1800 | ret = -ENOMEM; | |
1801 | dma_free_coherent(&dd->pcidev->dev, amt, | |
1802 | pd->port_rcvhdrq, | |
1803 | pd->port_rcvhdrq_phys); | |
1804 | pd->port_rcvhdrq = NULL; | |
1805 | goto bail; | |
1806 | } | |
1807 | pd->port_rcvhdrqtailaddr_phys = phys_hdrqtail; | |
1808 | ipath_cdbg(VERBOSE, "port %d hdrtailaddr, %llx " | |
1809 | "physical\n", pd->port_port, | |
1810 | (unsigned long long) phys_hdrqtail); | |
f37bda92 | 1811 | } |
7bb206e3 BS |
1812 | |
1813 | pd->port_rcvhdrq_size = amt; | |
1814 | ||
1815 | ipath_cdbg(VERBOSE, "%d pages at %p (phys %lx) size=%lu " | |
1816 | "for port %u rcvhdr Q\n", | |
1817 | amt >> PAGE_SHIFT, pd->port_rcvhdrq, | |
1818 | (unsigned long) pd->port_rcvhdrq_phys, | |
1819 | (unsigned long) pd->port_rcvhdrq_size, | |
1820 | pd->port_port); | |
63417188 | 1821 | } else { |
f37bda92 BS |
1822 | ipath_cdbg(VERBOSE, "reuse port %d rcvhdrq @%p %llx phys; " |
1823 | "hdrtailaddr@%p %llx physical\n", | |
1824 | pd->port_port, pd->port_rcvhdrq, | |
1fd3b40f BS |
1825 | (unsigned long long) pd->port_rcvhdrq_phys, |
1826 | pd->port_rcvhdrtail_kvaddr, (unsigned long long) | |
1827 | pd->port_rcvhdrqtailaddr_phys); | |
63417188 | 1828 | } |
f37bda92 BS |
1829 | /* clear for security and sanity on each use */ |
1830 | memset(pd->port_rcvhdrq, 0, pd->port_rcvhdrq_size); | |
c59a80ac RC |
1831 | if (pd->port_rcvhdrtail_kvaddr) |
1832 | memset(pd->port_rcvhdrtail_kvaddr, 0, PAGE_SIZE); | |
7bb206e3 BS |
1833 | |
1834 | /* | |
1835 | * tell chip each time we init it, even if we are re-using previous | |
f37bda92 | 1836 | * memory (we zero the register at process close) |
7bb206e3 | 1837 | */ |
f37bda92 BS |
1838 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr, |
1839 | pd->port_port, pd->port_rcvhdrqtailaddr_phys); | |
7bb206e3 BS |
1840 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, |
1841 | pd->port_port, pd->port_rcvhdrq_phys); | |
1842 | ||
7bb206e3 BS |
1843 | bail: |
1844 | return ret; | |
1845 | } | |
1846 | ||
9380068f DO |
1847 | |
1848 | /* | |
1849 | * Flush all sends that might be in the ready to send state, as well as any | |
1850 | * that are in the process of being sent. Used whenever we need to be | |
1851 | * sure the send side is idle. Cleans up all buffer state by canceling | |
1852 | * all pio buffers, and issuing an abort, which cleans up anything in the | |
1853 | * launch fifo. The cancel is superfluous on some chip versions, but | |
1854 | * it's safer to always do it. | |
1855 | * PIOAvail bits are updated by the chip as if normal send had happened. | |
1856 | */ | |
3810f2a8 | 1857 | void ipath_cancel_sends(struct ipath_devdata *dd, int restore_sendctrl) |
9380068f | 1858 | { |
124b4dcb DO |
1859 | unsigned long flags; |
1860 | ||
bb917144 AJ |
1861 | if (dd->ipath_flags & IPATH_IB_AUTONEG_INPROG) { |
1862 | ipath_cdbg(VERBOSE, "Ignore while in autonegotiation\n"); | |
1863 | goto bail; | |
1864 | } | |
124b4dcb DO |
1865 | /* |
1866 | * If we have SDMA, and it's not disabled, we have to kick off the | |
1867 | * abort state machine, provided we aren't already aborting. | |
1868 | * If we are in the process of aborting SDMA (!DISABLED, but ABORTING), | |
1869 | * we skip the rest of this routine. It is already "in progress" | |
1870 | */ | |
1871 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) { | |
1872 | int skip_cancel; | |
f018c7e1 | 1873 | unsigned long *statp = &dd->ipath_sdma_status; |
124b4dcb DO |
1874 | |
1875 | spin_lock_irqsave(&dd->ipath_sdma_lock, flags); | |
1876 | skip_cancel = | |
ab69b3cf JG |
1877 | test_and_set_bit(IPATH_SDMA_ABORTING, statp) |
1878 | && !test_bit(IPATH_SDMA_DISABLED, statp); | |
124b4dcb DO |
1879 | spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags); |
1880 | if (skip_cancel) | |
1881 | goto bail; | |
1882 | } | |
1883 | ||
9380068f | 1884 | ipath_dbg("Cancelling all in-progress send buffers\n"); |
2ba3f56e RC |
1885 | |
1886 | /* skip armlaunch errs for a while */ | |
1887 | dd->ipath_lastcancel = jiffies + HZ / 2; | |
1888 | ||
9380068f | 1889 | /* |
124b4dcb DO |
1890 | * The abort bit is auto-clearing. We also don't want pioavail |
1891 | * update happening during this, and we don't want any other | |
1892 | * sends going out, so turn those off for the duration. We read | |
1893 | * the scratch register to be sure that cancels and the abort | |
1894 | * have taken effect in the chip. Otherwise two parts are same | |
1895 | * as ipath_force_pio_avail_update() | |
9380068f | 1896 | */ |
124b4dcb DO |
1897 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
1898 | dd->ipath_sendctrl &= ~(INFINIPATH_S_PIOBUFAVAILUPD | |
1899 | | INFINIPATH_S_PIOENABLE); | |
9380068f | 1900 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
124b4dcb | 1901 | dd->ipath_sendctrl | INFINIPATH_S_ABORT); |
9380068f | 1902 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
124b4dcb DO |
1903 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
1904 | ||
1905 | /* disarm all send buffers */ | |
9380068f | 1906 | ipath_disarm_piobufs(dd, 0, |
124b4dcb DO |
1907 | dd->ipath_piobcnt2k + dd->ipath_piobcnt4k); |
1908 | ||
ab69b3cf JG |
1909 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) |
1910 | set_bit(IPATH_SDMA_DISARMED, &dd->ipath_sdma_status); | |
1911 | ||
124b4dcb DO |
1912 | if (restore_sendctrl) { |
1913 | /* else done by caller later if needed */ | |
1914 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); | |
1915 | dd->ipath_sendctrl |= INFINIPATH_S_PIOBUFAVAILUPD | | |
1916 | INFINIPATH_S_PIOENABLE; | |
3810f2a8 | 1917 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
124b4dcb DO |
1918 | dd->ipath_sendctrl); |
1919 | /* and again, be sure all have hit the chip */ | |
1920 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); | |
1921 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); | |
1922 | } | |
9380068f | 1923 | |
124b4dcb DO |
1924 | if ((dd->ipath_flags & IPATH_HAS_SEND_DMA) && |
1925 | !test_bit(IPATH_SDMA_DISABLED, &dd->ipath_sdma_status) && | |
1926 | test_bit(IPATH_SDMA_RUNNING, &dd->ipath_sdma_status)) { | |
1927 | spin_lock_irqsave(&dd->ipath_sdma_lock, flags); | |
1928 | /* only wait so long for intr */ | |
1929 | dd->ipath_sdma_abort_intr_timeout = jiffies + HZ; | |
1930 | dd->ipath_sdma_reset_wait = 200; | |
124b4dcb DO |
1931 | if (!test_bit(IPATH_SDMA_SHUTDOWN, &dd->ipath_sdma_status)) |
1932 | tasklet_hi_schedule(&dd->ipath_sdma_abort_task); | |
1933 | spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags); | |
1934 | } | |
bb917144 | 1935 | bail:; |
9380068f DO |
1936 | } |
1937 | ||
c4b4d16e RC |
1938 | /* |
1939 | * Force an update of in-memory copy of the pioavail registers, when | |
1940 | * needed for any of a variety of reasons. We read the scratch register | |
1941 | * to make it highly likely that the update will have happened by the | |
1942 | * time we return. If already off (as in cancel_sends above), this | |
1943 | * routine is a nop, on the assumption that the caller will "do the | |
1944 | * right thing". | |
1945 | */ | |
1946 | void ipath_force_pio_avail_update(struct ipath_devdata *dd) | |
1947 | { | |
1948 | unsigned long flags; | |
1949 | ||
1950 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); | |
1951 | if (dd->ipath_sendctrl & INFINIPATH_S_PIOBUFAVAILUPD) { | |
1952 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, | |
1953 | dd->ipath_sendctrl & ~INFINIPATH_S_PIOBUFAVAILUPD); | |
1954 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); | |
1955 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, | |
1956 | dd->ipath_sendctrl); | |
1957 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); | |
1958 | } | |
1959 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); | |
1960 | } | |
1961 | ||
4330e4da MA |
1962 | static void ipath_set_ib_lstate(struct ipath_devdata *dd, int linkcmd, |
1963 | int linitcmd) | |
7bb206e3 | 1964 | { |
4330e4da | 1965 | u64 mod_wd; |
7bb206e3 | 1966 | static const char *what[4] = { |
140277e9 RC |
1967 | [0] = "NOP", |
1968 | [INFINIPATH_IBCC_LINKCMD_DOWN] = "DOWN", | |
7bb206e3 BS |
1969 | [INFINIPATH_IBCC_LINKCMD_ARMED] = "ARMED", |
1970 | [INFINIPATH_IBCC_LINKCMD_ACTIVE] = "ACTIVE" | |
1971 | }; | |
f37bda92 | 1972 | |
4330e4da MA |
1973 | if (linitcmd == INFINIPATH_IBCC_LINKINITCMD_DISABLE) { |
1974 | /* | |
1975 | * If we are told to disable, note that so link-recovery | |
1976 | * code does not attempt to bring us back up. | |
1977 | */ | |
1978 | preempt_disable(); | |
1979 | dd->ipath_flags |= IPATH_IB_LINK_DISABLED; | |
1980 | preempt_enable(); | |
1981 | } else if (linitcmd) { | |
1982 | /* | |
1983 | * Any other linkinitcmd will lead to LINKDOWN and then | |
1984 | * to INIT (if all is well), so clear flag to let | |
1985 | * link-recovery code attempt to bring us back up. | |
1986 | */ | |
1987 | preempt_disable(); | |
1988 | dd->ipath_flags &= ~IPATH_IB_LINK_DISABLED; | |
1989 | preempt_enable(); | |
1990 | } | |
1991 | ||
1992 | mod_wd = (linkcmd << dd->ibcc_lc_shift) | | |
1993 | (linitcmd << INFINIPATH_IBCC_LINKINITCMD_SHIFT); | |
1994 | ipath_cdbg(VERBOSE, | |
1995 | "Moving unit %u to %s (initcmd=0x%x), current ltstate is %s\n", | |
1996 | dd->ipath_unit, what[linkcmd], linitcmd, | |
1997 | ipath_ibcstatus_str[ipath_ib_linktrstate(dd, | |
58411d1c | 1998 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus))]); |
7bb206e3 BS |
1999 | |
2000 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, | |
4330e4da MA |
2001 | dd->ipath_ibcctrl | mod_wd); |
2002 | /* read from chip so write is flushed */ | |
2003 | (void) ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); | |
7bb206e3 BS |
2004 | } |
2005 | ||
34b2aafe BS |
2006 | int ipath_set_linkstate(struct ipath_devdata *dd, u8 newstate) |
2007 | { | |
2008 | u32 lstate; | |
2009 | int ret; | |
2010 | ||
2011 | switch (newstate) { | |
140277e9 | 2012 | case IPATH_IB_LINKDOWN_ONLY: |
4330e4da | 2013 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, 0); |
140277e9 RC |
2014 | /* don't wait */ |
2015 | ret = 0; | |
2016 | goto bail; | |
2017 | ||
34b2aafe | 2018 | case IPATH_IB_LINKDOWN: |
4330e4da MA |
2019 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, |
2020 | INFINIPATH_IBCC_LINKINITCMD_POLL); | |
34b2aafe BS |
2021 | /* don't wait */ |
2022 | ret = 0; | |
2023 | goto bail; | |
2024 | ||
2025 | case IPATH_IB_LINKDOWN_SLEEP: | |
4330e4da MA |
2026 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, |
2027 | INFINIPATH_IBCC_LINKINITCMD_SLEEP); | |
34b2aafe BS |
2028 | /* don't wait */ |
2029 | ret = 0; | |
2030 | goto bail; | |
2031 | ||
2032 | case IPATH_IB_LINKDOWN_DISABLE: | |
4330e4da MA |
2033 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, |
2034 | INFINIPATH_IBCC_LINKINITCMD_DISABLE); | |
34b2aafe BS |
2035 | /* don't wait */ |
2036 | ret = 0; | |
2037 | goto bail; | |
2038 | ||
34b2aafe BS |
2039 | case IPATH_IB_LINKARM: |
2040 | if (dd->ipath_flags & IPATH_LINKARMED) { | |
2041 | ret = 0; | |
2042 | goto bail; | |
2043 | } | |
2044 | if (!(dd->ipath_flags & | |
2045 | (IPATH_LINKINIT | IPATH_LINKACTIVE))) { | |
2046 | ret = -EINVAL; | |
2047 | goto bail; | |
2048 | } | |
4330e4da MA |
2049 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ARMED, 0); |
2050 | ||
34b2aafe BS |
2051 | /* |
2052 | * Since the port can transition to ACTIVE by receiving | |
2053 | * a non VL 15 packet, wait for either state. | |
2054 | */ | |
2055 | lstate = IPATH_LINKARMED | IPATH_LINKACTIVE; | |
2056 | break; | |
2057 | ||
2058 | case IPATH_IB_LINKACTIVE: | |
2059 | if (dd->ipath_flags & IPATH_LINKACTIVE) { | |
2060 | ret = 0; | |
2061 | goto bail; | |
2062 | } | |
2063 | if (!(dd->ipath_flags & IPATH_LINKARMED)) { | |
2064 | ret = -EINVAL; | |
2065 | goto bail; | |
2066 | } | |
4330e4da | 2067 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ACTIVE, 0); |
34b2aafe BS |
2068 | lstate = IPATH_LINKACTIVE; |
2069 | break; | |
2070 | ||
946db67f BS |
2071 | case IPATH_IB_LINK_LOOPBACK: |
2072 | dev_info(&dd->pcidev->dev, "Enabling IB local loopback\n"); | |
2073 | dd->ipath_ibcctrl |= INFINIPATH_IBCC_LOOPBACK; | |
2074 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, | |
2075 | dd->ipath_ibcctrl); | |
b3e8f541 DO |
2076 | |
2077 | /* turn heartbeat off, as it causes loopback to fail */ | |
2078 | dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, | |
2079 | IPATH_IB_HRTBT_OFF); | |
2080 | /* don't wait */ | |
946db67f | 2081 | ret = 0; |
b3e8f541 | 2082 | goto bail; |
946db67f BS |
2083 | |
2084 | case IPATH_IB_LINK_EXTERNAL: | |
b3e8f541 DO |
2085 | dev_info(&dd->pcidev->dev, |
2086 | "Disabling IB local loopback (normal)\n"); | |
2087 | dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, | |
2088 | IPATH_IB_HRTBT_ON); | |
946db67f BS |
2089 | dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LOOPBACK; |
2090 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, | |
2091 | dd->ipath_ibcctrl); | |
b3e8f541 | 2092 | /* don't wait */ |
946db67f | 2093 | ret = 0; |
b3e8f541 DO |
2094 | goto bail; |
2095 | ||
2096 | /* | |
2097 | * Heartbeat can be explicitly enabled by the user via | |
2098 | * "hrtbt_enable" "file", and if disabled, trying to enable here | |
2099 | * will have no effect. Implicit changes (heartbeat off when | |
2100 | * loopback on, and vice versa) are included to ease testing. | |
2101 | */ | |
2102 | case IPATH_IB_LINK_HRTBT: | |
2103 | ret = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, | |
2104 | IPATH_IB_HRTBT_ON); | |
2105 | goto bail; | |
2106 | ||
2107 | case IPATH_IB_LINK_NO_HRTBT: | |
2108 | ret = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, | |
2109 | IPATH_IB_HRTBT_OFF); | |
2110 | goto bail; | |
946db67f | 2111 | |
34b2aafe BS |
2112 | default: |
2113 | ipath_dbg("Invalid linkstate 0x%x requested\n", newstate); | |
2114 | ret = -EINVAL; | |
2115 | goto bail; | |
2116 | } | |
2117 | ret = ipath_wait_linkstate(dd, lstate, 2000); | |
2118 | ||
2119 | bail: | |
2120 | return ret; | |
2121 | } | |
2122 | ||
2123 | /** | |
2124 | * ipath_set_mtu - set the MTU | |
2125 | * @dd: the infinipath device | |
2126 | * @arg: the new MTU | |
2127 | * | |
2128 | * we can handle "any" incoming size, the issue here is whether we | |
2129 | * need to restrict our outgoing size. For now, we don't do any | |
2130 | * sanity checking on this, and we don't deal with what happens to | |
2131 | * programs that are already running when the size changes. | |
2132 | * NOTE: changing the MTU will usually cause the IBC to go back to | |
124b4dcb | 2133 | * link INIT state... |
34b2aafe BS |
2134 | */ |
2135 | int ipath_set_mtu(struct ipath_devdata *dd, u16 arg) | |
2136 | { | |
2137 | u32 piosize; | |
2138 | int changed = 0; | |
2139 | int ret; | |
2140 | ||
2141 | /* | |
2142 | * mtu is IB data payload max. It's the largest power of 2 less | |
2143 | * than piosize (or even larger, since it only really controls the | |
2144 | * largest we can receive; we can send the max of the mtu and | |
2145 | * piosize). We check that it's one of the valid IB sizes. | |
2146 | */ | |
2147 | if (arg != 256 && arg != 512 && arg != 1024 && arg != 2048 && | |
826d8010 | 2148 | (arg != 4096 || !ipath_mtu4096)) { |
34b2aafe BS |
2149 | ipath_dbg("Trying to set invalid mtu %u, failing\n", arg); |
2150 | ret = -EINVAL; | |
2151 | goto bail; | |
2152 | } | |
2153 | if (dd->ipath_ibmtu == arg) { | |
2154 | ret = 0; /* same as current */ | |
2155 | goto bail; | |
2156 | } | |
2157 | ||
2158 | piosize = dd->ipath_ibmaxlen; | |
2159 | dd->ipath_ibmtu = arg; | |
2160 | ||
2161 | if (arg >= (piosize - IPATH_PIO_MAXIBHDR)) { | |
2162 | /* Only if it's not the initial value (or reset to it) */ | |
2163 | if (piosize != dd->ipath_init_ibmaxlen) { | |
826d8010 DO |
2164 | if (arg > piosize && arg <= dd->ipath_init_ibmaxlen) |
2165 | piosize = dd->ipath_init_ibmaxlen; | |
34b2aafe BS |
2166 | dd->ipath_ibmaxlen = piosize; |
2167 | changed = 1; | |
2168 | } | |
2169 | } else if ((arg + IPATH_PIO_MAXIBHDR) != dd->ipath_ibmaxlen) { | |
2170 | piosize = arg + IPATH_PIO_MAXIBHDR; | |
2171 | ipath_cdbg(VERBOSE, "ibmaxlen was 0x%x, setting to 0x%x " | |
2172 | "(mtu 0x%x)\n", dd->ipath_ibmaxlen, piosize, | |
2173 | arg); | |
2174 | dd->ipath_ibmaxlen = piosize; | |
2175 | changed = 1; | |
2176 | } | |
2177 | ||
2178 | if (changed) { | |
826d8010 | 2179 | u64 ibc = dd->ipath_ibcctrl, ibdw; |
34b2aafe | 2180 | /* |
826d8010 DO |
2181 | * update our housekeeping variables, and set IBC max |
2182 | * size, same as init code; max IBC is max we allow in | |
2183 | * buffer, less the qword pbc, plus 1 for ICRC, in dwords | |
34b2aafe | 2184 | */ |
826d8010 DO |
2185 | dd->ipath_ibmaxlen = piosize - 2 * sizeof(u32); |
2186 | ibdw = (dd->ipath_ibmaxlen >> 2) + 1; | |
34b2aafe | 2187 | ibc &= ~(INFINIPATH_IBCC_MAXPKTLEN_MASK << |
826d8010 DO |
2188 | dd->ibcc_mpl_shift); |
2189 | ibc |= ibdw << dd->ibcc_mpl_shift; | |
34b2aafe BS |
2190 | dd->ipath_ibcctrl = ibc; |
2191 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, | |
2192 | dd->ipath_ibcctrl); | |
2193 | dd->ipath_f_tidtemplate(dd); | |
2194 | } | |
2195 | ||
2196 | ret = 0; | |
2197 | ||
2198 | bail: | |
2199 | return ret; | |
2200 | } | |
2201 | ||
0ab6b2b9 | 2202 | int ipath_set_lid(struct ipath_devdata *dd, u32 lid, u8 lmc) |
34b2aafe | 2203 | { |
0ab6b2b9 | 2204 | dd->ipath_lid = lid; |
34b2aafe BS |
2205 | dd->ipath_lmc = lmc; |
2206 | ||
0ab6b2b9 DO |
2207 | dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LIDLMC, lid | |
2208 | (~((1U << lmc) - 1)) << 16); | |
2209 | ||
2210 | dev_info(&dd->pcidev->dev, "We got a lid: 0x%x\n", lid); | |
2211 | ||
34b2aafe BS |
2212 | return 0; |
2213 | } | |
2214 | ||
7bb206e3 BS |
2215 | |
2216 | /** | |
2217 | * ipath_write_kreg_port - write a device's per-port 64-bit kernel register | |
2218 | * @dd: the infinipath device | |
2219 | * @regno: the register number to write | |
2220 | * @port: the port containing the register | |
2221 | * @value: the value to write | |
2222 | * | |
2223 | * Registers that vary with the chip implementation constants (port) | |
2224 | * use this routine. | |
2225 | */ | |
2226 | void ipath_write_kreg_port(const struct ipath_devdata *dd, ipath_kreg regno, | |
2227 | unsigned port, u64 value) | |
2228 | { | |
2229 | u16 where; | |
2230 | ||
2231 | if (port < dd->ipath_portcnt && | |
2232 | (regno == dd->ipath_kregs->kr_rcvhdraddr || | |
2233 | regno == dd->ipath_kregs->kr_rcvhdrtailaddr)) | |
2234 | where = regno + port; | |
2235 | else | |
2236 | where = -1; | |
2237 | ||
2238 | ipath_write_kreg(dd, where, value); | |
2239 | } | |
2240 | ||
82466f00 MA |
2241 | /* |
2242 | * Following deal with the "obviously simple" task of overriding the state | |
2243 | * of the LEDS, which normally indicate link physical and logical status. | |
2244 | * The complications arise in dealing with different hardware mappings | |
2245 | * and the board-dependent routine being called from interrupts. | |
2246 | * and then there's the requirement to _flash_ them. | |
2247 | */ | |
2248 | #define LED_OVER_FREQ_SHIFT 8 | |
2249 | #define LED_OVER_FREQ_MASK (0xFF<<LED_OVER_FREQ_SHIFT) | |
2250 | /* Below is "non-zero" to force override, but both actual LEDs are off */ | |
2251 | #define LED_OVER_BOTH_OFF (8) | |
2252 | ||
da9aec7b | 2253 | static void ipath_run_led_override(unsigned long opaque) |
82466f00 MA |
2254 | { |
2255 | struct ipath_devdata *dd = (struct ipath_devdata *)opaque; | |
2256 | int timeoff; | |
2257 | int pidx; | |
2258 | u64 lstate, ltstate, val; | |
2259 | ||
2260 | if (!(dd->ipath_flags & IPATH_INITTED)) | |
2261 | return; | |
2262 | ||
2263 | pidx = dd->ipath_led_override_phase++ & 1; | |
2264 | dd->ipath_led_override = dd->ipath_led_override_vals[pidx]; | |
2265 | timeoff = dd->ipath_led_override_timeoff; | |
2266 | ||
2267 | /* | |
2268 | * below potentially restores the LED values per current status, | |
2269 | * should also possibly setup the traffic-blink register, | |
2270 | * but leave that to per-chip functions. | |
2271 | */ | |
2272 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); | |
124b4dcb DO |
2273 | ltstate = ipath_ib_linktrstate(dd, val); |
2274 | lstate = ipath_ib_linkstate(dd, val); | |
82466f00 MA |
2275 | |
2276 | dd->ipath_f_setextled(dd, lstate, ltstate); | |
2277 | mod_timer(&dd->ipath_led_override_timer, jiffies + timeoff); | |
2278 | } | |
2279 | ||
2280 | void ipath_set_led_override(struct ipath_devdata *dd, unsigned int val) | |
2281 | { | |
2282 | int timeoff, freq; | |
2283 | ||
2284 | if (!(dd->ipath_flags & IPATH_INITTED)) | |
2285 | return; | |
2286 | ||
2287 | /* First check if we are blinking. If not, use 1HZ polling */ | |
2288 | timeoff = HZ; | |
2289 | freq = (val & LED_OVER_FREQ_MASK) >> LED_OVER_FREQ_SHIFT; | |
2290 | ||
2291 | if (freq) { | |
2292 | /* For blink, set each phase from one nybble of val */ | |
2293 | dd->ipath_led_override_vals[0] = val & 0xF; | |
2294 | dd->ipath_led_override_vals[1] = (val >> 4) & 0xF; | |
2295 | timeoff = (HZ << 4)/freq; | |
2296 | } else { | |
2297 | /* Non-blink set both phases the same. */ | |
2298 | dd->ipath_led_override_vals[0] = val & 0xF; | |
2299 | dd->ipath_led_override_vals[1] = val & 0xF; | |
2300 | } | |
2301 | dd->ipath_led_override_timeoff = timeoff; | |
2302 | ||
2303 | /* | |
2304 | * If the timer has not already been started, do so. Use a "quick" | |
2305 | * timeout so the function will be called soon, to look at our request. | |
2306 | */ | |
2307 | if (atomic_inc_return(&dd->ipath_led_override_timer_active) == 1) { | |
2308 | /* Need to start timer */ | |
6149e2e4 MFW |
2309 | setup_timer(&dd->ipath_led_override_timer, |
2310 | ipath_run_led_override, (unsigned long)dd); | |
2311 | ||
82466f00 MA |
2312 | dd->ipath_led_override_timer.expires = jiffies + 1; |
2313 | add_timer(&dd->ipath_led_override_timer); | |
2ba3f56e | 2314 | } else |
82466f00 | 2315 | atomic_dec(&dd->ipath_led_override_timer_active); |
82466f00 MA |
2316 | } |
2317 | ||
7bb206e3 BS |
2318 | /** |
2319 | * ipath_shutdown_device - shut down a device | |
2320 | * @dd: the infinipath device | |
2321 | * | |
2322 | * This is called to make the device quiet when we are about to | |
2323 | * unload the driver, and also when the device is administratively | |
2324 | * disabled. It does not free any data structures. | |
2325 | * Everything it does has to be setup again by ipath_init_chip(dd,1) | |
2326 | */ | |
2327 | void ipath_shutdown_device(struct ipath_devdata *dd) | |
2328 | { | |
e342c119 JG |
2329 | unsigned long flags; |
2330 | ||
7bb206e3 BS |
2331 | ipath_dbg("Shutting down the device\n"); |
2332 | ||
58411d1c JG |
2333 | ipath_hol_up(dd); /* make sure user processes aren't suspended */ |
2334 | ||
7bb206e3 BS |
2335 | dd->ipath_flags |= IPATH_LINKUNK; |
2336 | dd->ipath_flags &= ~(IPATH_INITTED | IPATH_LINKDOWN | | |
2337 | IPATH_LINKINIT | IPATH_LINKARMED | | |
2338 | IPATH_LINKACTIVE); | |
2339 | *dd->ipath_statusp &= ~(IPATH_STATUS_IB_CONF | | |
2340 | IPATH_STATUS_IB_READY); | |
2341 | ||
2342 | /* mask interrupts, but not errors */ | |
2343 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); | |
2344 | ||
2345 | dd->ipath_rcvctrl = 0; | |
2346 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, | |
2347 | dd->ipath_rcvctrl); | |
2348 | ||
124b4dcb DO |
2349 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) |
2350 | teardown_sdma(dd); | |
2351 | ||
7bb206e3 BS |
2352 | /* |
2353 | * gracefully stop all sends allowing any in progress to trickle out | |
2354 | * first. | |
2355 | */ | |
e342c119 JG |
2356 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
2357 | dd->ipath_sendctrl = 0; | |
2358 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); | |
7bb206e3 | 2359 | /* flush it */ |
44f8e3f3 | 2360 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
e342c119 JG |
2361 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
2362 | ||
7bb206e3 BS |
2363 | /* |
2364 | * enough for anything that's going to trickle out to have actually | |
2365 | * done so. | |
2366 | */ | |
2367 | udelay(5); | |
2368 | ||
124b4dcb DO |
2369 | dd->ipath_f_setextled(dd, 0, 0); /* make sure LEDs are off */ |
2370 | ||
4330e4da | 2371 | ipath_set_ib_lstate(dd, 0, INFINIPATH_IBCC_LINKINITCMD_DISABLE); |
3810f2a8 | 2372 | ipath_cancel_sends(dd, 0); |
7bb206e3 | 2373 | |
124b4dcb DO |
2374 | /* |
2375 | * we are shutting down, so tell components that care. We don't do | |
2376 | * this on just a link state change, much like ethernet, a cable | |
2377 | * unplug, etc. doesn't change driver state | |
2378 | */ | |
49739b3e RC |
2379 | signal_ib_event(dd, IB_EVENT_PORT_ERR); |
2380 | ||
7bb206e3 BS |
2381 | /* disable IBC */ |
2382 | dd->ipath_control &= ~INFINIPATH_C_LINKENABLE; | |
2383 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, | |
a40f55fc | 2384 | dd->ipath_control | INFINIPATH_C_FREEZEMODE); |
7bb206e3 BS |
2385 | |
2386 | /* | |
2387 | * clear SerdesEnable and turn the leds off; do this here because | |
2388 | * we are unloading, so don't count on interrupts to move along | |
25985edc | 2389 | * Turn the LEDs off explicitly for the same reason. |
7bb206e3 BS |
2390 | */ |
2391 | dd->ipath_f_quiet_serdes(dd); | |
7bb206e3 | 2392 | |
58411d1c JG |
2393 | /* stop all the timers that might still be running */ |
2394 | del_timer_sync(&dd->ipath_hol_timer); | |
7bb206e3 BS |
2395 | if (dd->ipath_stats_timer_active) { |
2396 | del_timer_sync(&dd->ipath_stats_timer); | |
2397 | dd->ipath_stats_timer_active = 0; | |
2398 | } | |
9b436eb4 DO |
2399 | if (dd->ipath_intrchk_timer.data) { |
2400 | del_timer_sync(&dd->ipath_intrchk_timer); | |
2401 | dd->ipath_intrchk_timer.data = 0; | |
2402 | } | |
124b4dcb DO |
2403 | if (atomic_read(&dd->ipath_led_override_timer_active)) { |
2404 | del_timer_sync(&dd->ipath_led_override_timer); | |
2405 | atomic_set(&dd->ipath_led_override_timer_active, 0); | |
2406 | } | |
7bb206e3 BS |
2407 | |
2408 | /* | |
2409 | * clear all interrupts and errors, so that the next time the driver | |
2410 | * is loaded or device is enabled, we know that whatever is set | |
2411 | * happened while we were unloaded | |
2412 | */ | |
2413 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, | |
2414 | ~0ULL & ~INFINIPATH_HWE_MEMBISTFAILED); | |
2415 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL); | |
2416 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL); | |
aecd3b5a MA |
2417 | |
2418 | ipath_cdbg(VERBOSE, "Flush time and errors to EEPROM\n"); | |
2419 | ipath_update_eeprom_log(dd); | |
7bb206e3 BS |
2420 | } |
2421 | ||
2422 | /** | |
2423 | * ipath_free_pddata - free a port's allocated data | |
2424 | * @dd: the infinipath device | |
f37bda92 | 2425 | * @pd: the portdata structure |
7bb206e3 | 2426 | * |
f37bda92 BS |
2427 | * free up any allocated data for a port |
2428 | * This should not touch anything that would affect a simultaneous | |
2429 | * re-allocation of port data, because it is called after ipath_mutex | |
2430 | * is released (and can be called from reinit as well). | |
2431 | * It should never change any chip state, or global driver state. | |
2432 | * (The only exception to global state is freeing the port0 port0_skbs.) | |
7bb206e3 | 2433 | */ |
f37bda92 | 2434 | void ipath_free_pddata(struct ipath_devdata *dd, struct ipath_portdata *pd) |
7bb206e3 | 2435 | { |
7bb206e3 BS |
2436 | if (!pd) |
2437 | return; | |
f37bda92 BS |
2438 | |
2439 | if (pd->port_rcvhdrq) { | |
7bb206e3 BS |
2440 | ipath_cdbg(VERBOSE, "free closed port %d rcvhdrq @ %p " |
2441 | "(size=%lu)\n", pd->port_port, pd->port_rcvhdrq, | |
2442 | (unsigned long) pd->port_rcvhdrq_size); | |
2443 | dma_free_coherent(&dd->pcidev->dev, pd->port_rcvhdrq_size, | |
2444 | pd->port_rcvhdrq, pd->port_rcvhdrq_phys); | |
2445 | pd->port_rcvhdrq = NULL; | |
f37bda92 BS |
2446 | if (pd->port_rcvhdrtail_kvaddr) { |
2447 | dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE, | |
076fafcd | 2448 | pd->port_rcvhdrtail_kvaddr, |
f37bda92 BS |
2449 | pd->port_rcvhdrqtailaddr_phys); |
2450 | pd->port_rcvhdrtail_kvaddr = NULL; | |
2451 | } | |
7bb206e3 | 2452 | } |
f37bda92 BS |
2453 | if (pd->port_port && pd->port_rcvegrbuf) { |
2454 | unsigned e; | |
2455 | ||
2456 | for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { | |
2457 | void *base = pd->port_rcvegrbuf[e]; | |
2458 | size_t size = pd->port_rcvegrbuf_size; | |
2459 | ||
2460 | ipath_cdbg(VERBOSE, "egrbuf free(%p, %lu), " | |
2461 | "chunk %u/%u\n", base, | |
2462 | (unsigned long) size, | |
2463 | e, pd->port_rcvegrbuf_chunks); | |
2464 | dma_free_coherent(&dd->pcidev->dev, size, | |
2465 | base, pd->port_rcvegrbuf_phys[e]); | |
7bb206e3 | 2466 | } |
9929b0fb | 2467 | kfree(pd->port_rcvegrbuf); |
f37bda92 | 2468 | pd->port_rcvegrbuf = NULL; |
9929b0fb | 2469 | kfree(pd->port_rcvegrbuf_phys); |
f37bda92 | 2470 | pd->port_rcvegrbuf_phys = NULL; |
7bb206e3 | 2471 | pd->port_rcvegrbuf_chunks = 0; |
1fd3b40f | 2472 | } else if (pd->port_port == 0 && dd->ipath_port0_skbinfo) { |
7bb206e3 | 2473 | unsigned e; |
1fd3b40f | 2474 | struct ipath_skbinfo *skbinfo = dd->ipath_port0_skbinfo; |
7bb206e3 | 2475 | |
1fd3b40f BS |
2476 | dd->ipath_port0_skbinfo = NULL; |
2477 | ipath_cdbg(VERBOSE, "free closed port %d " | |
2478 | "ipath_port0_skbinfo @ %p\n", pd->port_port, | |
2479 | skbinfo); | |
9355fb6a | 2480 | for (e = 0; e < dd->ipath_p0_rcvegrcnt; e++) |
2ba3f56e RC |
2481 | if (skbinfo[e].skb) { |
2482 | pci_unmap_single(dd->pcidev, skbinfo[e].phys, | |
2483 | dd->ipath_ibmaxlen, | |
2484 | PCI_DMA_FROMDEVICE); | |
2485 | dev_kfree_skb(skbinfo[e].skb); | |
2486 | } | |
1fd3b40f | 2487 | vfree(skbinfo); |
7bb206e3 | 2488 | } |
f37bda92 | 2489 | kfree(pd->port_tid_pg_list); |
9929b0fb BS |
2490 | vfree(pd->subport_uregbase); |
2491 | vfree(pd->subport_rcvegrbuf); | |
2492 | vfree(pd->subport_rcvhdr_base); | |
f37bda92 | 2493 | kfree(pd); |
7bb206e3 BS |
2494 | } |
2495 | ||
ac2ae4c9 | 2496 | static int __init infinipath_init(void) |
7bb206e3 BS |
2497 | { |
2498 | int ret; | |
2499 | ||
39c0d0b9 BS |
2500 | if (ipath_debug & __IPATH_DBG) |
2501 | printk(KERN_INFO DRIVER_LOAD_MSG "%s", ib_ipath_version); | |
7bb206e3 BS |
2502 | |
2503 | /* | |
2504 | * These must be called before the driver is registered with | |
2505 | * the PCI subsystem. | |
2506 | */ | |
2507 | idr_init(&unit_table); | |
7bb206e3 BS |
2508 | |
2509 | ret = pci_register_driver(&ipath_driver); | |
2510 | if (ret < 0) { | |
2511 | printk(KERN_ERR IPATH_DRV_NAME | |
2512 | ": Unable to register driver: error %d\n", -ret); | |
2513 | goto bail_unit; | |
2514 | } | |
2515 | ||
7bb206e3 BS |
2516 | ret = ipath_init_ipathfs(); |
2517 | if (ret < 0) { | |
2518 | printk(KERN_ERR IPATH_DRV_NAME ": Unable to create " | |
2519 | "ipathfs: error %d\n", -ret); | |
23b9c1ab | 2520 | goto bail_pci; |
7bb206e3 BS |
2521 | } |
2522 | ||
2523 | goto bail; | |
2524 | ||
7bb206e3 BS |
2525 | bail_pci: |
2526 | pci_unregister_driver(&ipath_driver); | |
2527 | ||
2528 | bail_unit: | |
2529 | idr_destroy(&unit_table); | |
2530 | ||
2531 | bail: | |
2532 | return ret; | |
2533 | } | |
2534 | ||
7bb206e3 BS |
2535 | static void __exit infinipath_cleanup(void) |
2536 | { | |
7bb206e3 BS |
2537 | ipath_exit_ipathfs(); |
2538 | ||
7bb206e3 BS |
2539 | ipath_cdbg(VERBOSE, "Unregistering pci driver\n"); |
2540 | pci_unregister_driver(&ipath_driver); | |
2541 | ||
2542 | idr_destroy(&unit_table); | |
2543 | } | |
2544 | ||
2545 | /** | |
2546 | * ipath_reset_device - reset the chip if possible | |
2547 | * @unit: the device to reset | |
2548 | * | |
2549 | * Whether or not reset is successful, we attempt to re-initialize the chip | |
2550 | * (that is, much like a driver unload/reload). We clear the INITTED flag | |
2551 | * so that the various entry points will fail until we reinitialize. For | |
2552 | * now, we only allow this if no user ports are open that use chip resources | |
2553 | */ | |
2554 | int ipath_reset_device(int unit) | |
2555 | { | |
2556 | int ret, i; | |
2557 | struct ipath_devdata *dd = ipath_lookup(unit); | |
3d089098 | 2558 | unsigned long flags; |
7bb206e3 BS |
2559 | |
2560 | if (!dd) { | |
2561 | ret = -ENODEV; | |
2562 | goto bail; | |
2563 | } | |
2564 | ||
82466f00 MA |
2565 | if (atomic_read(&dd->ipath_led_override_timer_active)) { |
2566 | /* Need to stop LED timer, _then_ shut off LEDs */ | |
2567 | del_timer_sync(&dd->ipath_led_override_timer); | |
2568 | atomic_set(&dd->ipath_led_override_timer_active, 0); | |
2569 | } | |
2570 | ||
2571 | /* Shut off LEDs after we are sure timer is not running */ | |
2572 | dd->ipath_led_override = LED_OVER_BOTH_OFF; | |
2573 | dd->ipath_f_setextled(dd, 0, 0); | |
2574 | ||
7bb206e3 BS |
2575 | dev_info(&dd->pcidev->dev, "Reset on unit %u requested\n", unit); |
2576 | ||
2577 | if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) { | |
2578 | dev_info(&dd->pcidev->dev, "Invalid unit number %u or " | |
2579 | "not initialized or not present\n", unit); | |
2580 | ret = -ENXIO; | |
2581 | goto bail; | |
2582 | } | |
2583 | ||
3d089098 | 2584 | spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); |
7bb206e3 | 2585 | if (dd->ipath_pd) |
23e86a45 | 2586 | for (i = 1; i < dd->ipath_cfgports; i++) { |
3d089098 DO |
2587 | if (!dd->ipath_pd[i] || !dd->ipath_pd[i]->port_cnt) |
2588 | continue; | |
2589 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); | |
2590 | ipath_dbg("unit %u port %d is in use " | |
2591 | "(PID %u cmd %s), can't reset\n", | |
2592 | unit, i, | |
2593 | pid_nr(dd->ipath_pd[i]->port_pid), | |
2594 | dd->ipath_pd[i]->port_comm); | |
2595 | ret = -EBUSY; | |
2596 | goto bail; | |
7bb206e3 | 2597 | } |
3d089098 | 2598 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); |
7bb206e3 | 2599 | |
124b4dcb DO |
2600 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) |
2601 | teardown_sdma(dd); | |
2602 | ||
7bb206e3 | 2603 | dd->ipath_flags &= ~IPATH_INITTED; |
124b4dcb | 2604 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); |
7bb206e3 | 2605 | ret = dd->ipath_f_reset(dd); |
124b4dcb DO |
2606 | if (ret == 1) { |
2607 | ipath_dbg("Reinitializing unit %u after reset attempt\n", | |
2608 | unit); | |
2609 | ret = ipath_init_chip(dd, 1); | |
2610 | } else | |
2611 | ret = -EAGAIN; | |
7bb206e3 BS |
2612 | if (ret) |
2613 | ipath_dev_err(dd, "Reinitialize unit %u after " | |
2614 | "reset failed with %d\n", unit, ret); | |
2615 | else | |
2616 | dev_info(&dd->pcidev->dev, "Reinitialized unit %u after " | |
2617 | "resetting\n", unit); | |
2618 | ||
2619 | bail: | |
2620 | return ret; | |
2621 | } | |
2622 | ||
58411d1c JG |
2623 | /* |
2624 | * send a signal to all the processes that have the driver open | |
2625 | * through the normal interfaces (i.e., everything other than diags | |
2626 | * interface). Returns number of signalled processes. | |
2627 | */ | |
2628 | static int ipath_signal_procs(struct ipath_devdata *dd, int sig) | |
2629 | { | |
2630 | int i, sub, any = 0; | |
40d97692 | 2631 | struct pid *pid; |
3d089098 | 2632 | unsigned long flags; |
58411d1c JG |
2633 | |
2634 | if (!dd->ipath_pd) | |
2635 | return 0; | |
3d089098 DO |
2636 | |
2637 | spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); | |
58411d1c | 2638 | for (i = 1; i < dd->ipath_cfgports; i++) { |
40d97692 | 2639 | if (!dd->ipath_pd[i] || !dd->ipath_pd[i]->port_cnt) |
58411d1c JG |
2640 | continue; |
2641 | pid = dd->ipath_pd[i]->port_pid; | |
40d97692 PE |
2642 | if (!pid) |
2643 | continue; | |
2644 | ||
58411d1c JG |
2645 | dev_info(&dd->pcidev->dev, "context %d in use " |
2646 | "(PID %u), sending signal %d\n", | |
40d97692 PE |
2647 | i, pid_nr(pid), sig); |
2648 | kill_pid(pid, sig, 1); | |
58411d1c JG |
2649 | any++; |
2650 | for (sub = 0; sub < INFINIPATH_MAX_SUBPORT; sub++) { | |
2651 | pid = dd->ipath_pd[i]->port_subpid[sub]; | |
2652 | if (!pid) | |
2653 | continue; | |
2654 | dev_info(&dd->pcidev->dev, "sub-context " | |
2655 | "%d:%d in use (PID %u), sending " | |
40d97692 PE |
2656 | "signal %d\n", i, sub, pid_nr(pid), sig); |
2657 | kill_pid(pid, sig, 1); | |
58411d1c JG |
2658 | any++; |
2659 | } | |
2660 | } | |
3d089098 | 2661 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); |
58411d1c JG |
2662 | return any; |
2663 | } | |
2664 | ||
2665 | static void ipath_hol_signal_down(struct ipath_devdata *dd) | |
2666 | { | |
2667 | if (ipath_signal_procs(dd, SIGSTOP)) | |
2668 | ipath_dbg("Stopped some processes\n"); | |
2669 | ipath_cancel_sends(dd, 1); | |
2670 | } | |
2671 | ||
2672 | ||
2673 | static void ipath_hol_signal_up(struct ipath_devdata *dd) | |
2674 | { | |
2675 | if (ipath_signal_procs(dd, SIGCONT)) | |
2676 | ipath_dbg("Continued some processes\n"); | |
2677 | } | |
2678 | ||
2679 | /* | |
2680 | * link is down, stop any users processes, and flush pending sends | |
2681 | * to prevent HoL blocking, then start the HoL timer that | |
2682 | * periodically continues, then stop procs, so they can detect | |
2683 | * link down if they want, and do something about it. | |
74019224 | 2684 | * Timer may already be running, so use mod_timer, not add_timer. |
58411d1c JG |
2685 | */ |
2686 | void ipath_hol_down(struct ipath_devdata *dd) | |
2687 | { | |
2688 | dd->ipath_hol_state = IPATH_HOL_DOWN; | |
2689 | ipath_hol_signal_down(dd); | |
2690 | dd->ipath_hol_next = IPATH_HOL_DOWNCONT; | |
2691 | dd->ipath_hol_timer.expires = jiffies + | |
2692 | msecs_to_jiffies(ipath_hol_timeout_ms); | |
74019224 | 2693 | mod_timer(&dd->ipath_hol_timer, dd->ipath_hol_timer.expires); |
58411d1c JG |
2694 | } |
2695 | ||
2696 | /* | |
2697 | * link is up, continue any user processes, and ensure timer | |
2698 | * is a nop, if running. Let timer keep running, if set; it | |
2699 | * will nop when it sees the link is up | |
2700 | */ | |
2701 | void ipath_hol_up(struct ipath_devdata *dd) | |
2702 | { | |
2703 | ipath_hol_signal_up(dd); | |
2704 | dd->ipath_hol_state = IPATH_HOL_UP; | |
2705 | } | |
2706 | ||
2707 | /* | |
2708 | * toggle the running/not running state of user proceses | |
2709 | * to prevent HoL blocking on chip resources, but still allow | |
2710 | * user processes to do link down special case handling. | |
2711 | * Should only be called via the timer | |
2712 | */ | |
2713 | void ipath_hol_event(unsigned long opaque) | |
2714 | { | |
2715 | struct ipath_devdata *dd = (struct ipath_devdata *)opaque; | |
2716 | ||
2717 | if (dd->ipath_hol_next == IPATH_HOL_DOWNSTOP | |
2718 | && dd->ipath_hol_state != IPATH_HOL_UP) { | |
2719 | dd->ipath_hol_next = IPATH_HOL_DOWNCONT; | |
2720 | ipath_dbg("Stopping processes\n"); | |
2721 | ipath_hol_signal_down(dd); | |
2722 | } else { /* may do "extra" if also in ipath_hol_up() */ | |
2723 | dd->ipath_hol_next = IPATH_HOL_DOWNSTOP; | |
2724 | ipath_dbg("Continuing processes\n"); | |
2725 | ipath_hol_signal_up(dd); | |
2726 | } | |
2727 | if (dd->ipath_hol_state == IPATH_HOL_UP) | |
2728 | ipath_dbg("link's up, don't resched timer\n"); | |
2729 | else { | |
2730 | dd->ipath_hol_timer.expires = jiffies + | |
2731 | msecs_to_jiffies(ipath_hol_timeout_ms); | |
74019224 | 2732 | mod_timer(&dd->ipath_hol_timer, |
58411d1c JG |
2733 | dd->ipath_hol_timer.expires); |
2734 | } | |
2735 | } | |
2736 | ||
30fc5c31 BS |
2737 | int ipath_set_rx_pol_inv(struct ipath_devdata *dd, u8 new_pol_inv) |
2738 | { | |
2739 | u64 val; | |
2ba3f56e RC |
2740 | |
2741 | if (new_pol_inv > INFINIPATH_XGXS_RX_POL_MASK) | |
30fc5c31 | 2742 | return -1; |
2ba3f56e | 2743 | if (dd->ipath_rx_pol_inv != new_pol_inv) { |
30fc5c31 BS |
2744 | dd->ipath_rx_pol_inv = new_pol_inv; |
2745 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig); | |
2746 | val &= ~(INFINIPATH_XGXS_RX_POL_MASK << | |
3cd96564 RD |
2747 | INFINIPATH_XGXS_RX_POL_SHIFT); |
2748 | val |= ((u64)dd->ipath_rx_pol_inv) << | |
2749 | INFINIPATH_XGXS_RX_POL_SHIFT; | |
30fc5c31 BS |
2750 | ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val); |
2751 | } | |
2752 | return 0; | |
2753 | } | |
6ac50727 DO |
2754 | |
2755 | /* | |
2756 | * Disable and enable the armlaunch error. Used for PIO bandwidth testing on | |
2757 | * the 7220, which is count-based, rather than trigger-based. Safe for the | |
2758 | * driver check, since it's at init. Not completely safe when used for | |
2759 | * user-mode checking, since some error checking can be lost, but not | |
2760 | * particularly risky, and only has problematic side-effects in the face of | |
2761 | * very buggy user code. There is no reference counting, but that's also | |
2762 | * fine, given the intended use. | |
2763 | */ | |
2764 | void ipath_enable_armlaunch(struct ipath_devdata *dd) | |
2765 | { | |
2766 | dd->ipath_lasterror &= ~INFINIPATH_E_SPIOARMLAUNCH; | |
2767 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, | |
2768 | INFINIPATH_E_SPIOARMLAUNCH); | |
2769 | dd->ipath_errormask |= INFINIPATH_E_SPIOARMLAUNCH; | |
2770 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, | |
2771 | dd->ipath_errormask); | |
2772 | } | |
2773 | ||
2774 | void ipath_disable_armlaunch(struct ipath_devdata *dd) | |
2775 | { | |
2776 | /* so don't re-enable if already set */ | |
2777 | dd->ipath_maskederrs &= ~INFINIPATH_E_SPIOARMLAUNCH; | |
2778 | dd->ipath_errormask &= ~INFINIPATH_E_SPIOARMLAUNCH; | |
2779 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, | |
2780 | dd->ipath_errormask); | |
2781 | } | |
2782 | ||
7bb206e3 BS |
2783 | module_init(infinipath_init); |
2784 | module_exit(infinipath_cleanup); |