?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
mm/filemap_xip.c: fix race condition in xip_file_fault()
[linux-2.6.git] / drivers / ps3 / ps3-lpm.c
blob643697f7139070d61cd03015a6d8d6980aa889e2
1 /*
2 * PS3 Logical Performance Monitor.
3 *
4 * Copyright (C) 2007 Sony Computer Entertainment Inc.
5 * Copyright 2007 Sony Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include <linux/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/interrupt.h>
25 #include <linux/uaccess.h>
26 #include <asm/smp.h>
27 #include <asm/time.h>
28 #include <asm/ps3.h>
29 #include <asm/lv1call.h>
30 #include <asm/cell-pmu.h>
31
32
33 /* BOOKMARK tag macros */
34 #define PS3_PM_BOOKMARK_START 0x8000000000000000ULL
35 #define PS3_PM_BOOKMARK_STOP 0x4000000000000000ULL
36 #define PS3_PM_BOOKMARK_TAG_KERNEL 0x1000000000000000ULL
37 #define PS3_PM_BOOKMARK_TAG_USER 0x3000000000000000ULL
38 #define PS3_PM_BOOKMARK_TAG_MASK_HI 0xF000000000000000ULL
39 #define PS3_PM_BOOKMARK_TAG_MASK_LO 0x0F00000000000000ULL
40
41 /* CBE PM CONTROL register macros */
42 #define PS3_PM_CONTROL_PPU_TH0_BOOKMARK 0x00001000
43 #define PS3_PM_CONTROL_PPU_TH1_BOOKMARK 0x00000800
44 #define PS3_PM_CONTROL_PPU_COUNT_MODE_MASK 0x000C0000
45 #define PS3_PM_CONTROL_PPU_COUNT_MODE_PROBLEM 0x00080000
46 #define PS3_WRITE_PM_MASK 0xFFFFFFFFFFFFFFFFULL
47
48 /* CBE PM START STOP register macros */
49 #define PS3_PM_START_STOP_PPU_TH0_BOOKMARK_START 0x02000000
50 #define PS3_PM_START_STOP_PPU_TH1_BOOKMARK_START 0x01000000
51 #define PS3_PM_START_STOP_PPU_TH0_BOOKMARK_STOP 0x00020000
52 #define PS3_PM_START_STOP_PPU_TH1_BOOKMARK_STOP 0x00010000
53 #define PS3_PM_START_STOP_START_MASK 0xFF000000
54 #define PS3_PM_START_STOP_STOP_MASK 0x00FF0000
55
56 /* CBE PM COUNTER register macres */
57 #define PS3_PM_COUNTER_MASK_HI 0xFFFFFFFF00000000ULL
58 #define PS3_PM_COUNTER_MASK_LO 0x00000000FFFFFFFFULL
59
60 /* BASE SIGNAL GROUP NUMBER macros */
61 #define PM_ISLAND2_BASE_SIGNAL_GROUP_NUMBER 0
62 #define PM_ISLAND2_SIGNAL_GROUP_NUMBER1 6
63 #define PM_ISLAND2_SIGNAL_GROUP_NUMBER2 7
64 #define PM_ISLAND3_BASE_SIGNAL_GROUP_NUMBER 7
65 #define PM_ISLAND4_BASE_SIGNAL_GROUP_NUMBER 15
66 #define PM_SPU_TRIGGER_SIGNAL_GROUP_NUMBER 17
67 #define PM_SPU_EVENT_SIGNAL_GROUP_NUMBER 18
68 #define PM_ISLAND5_BASE_SIGNAL_GROUP_NUMBER 18
69 #define PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER 24
70 #define PM_ISLAND7_BASE_SIGNAL_GROUP_NUMBER 49
71 #define PM_ISLAND8_BASE_SIGNAL_GROUP_NUMBER 52
72 #define PM_SIG_GROUP_SPU 41
73 #define PM_SIG_GROUP_SPU_TRIGGER 42
74 #define PM_SIG_GROUP_SPU_EVENT 43
75 #define PM_SIG_GROUP_MFC_MAX 60
76
77 /**
78 * struct ps3_lpm_shadow_regs - Performance monitor shadow registers.
79 *
80 * @pm_control: Shadow of the processor's pm_control register.
81 * @pm_start_stop: Shadow of the processor's pm_start_stop register.
82 * @group_control: Shadow of the processor's group_control register.
83 * @debug_bus_control: Shadow of the processor's debug_bus_control register.
84 *
85 * The logical performance monitor provides a write-only interface to
86 * these processor registers. These shadow variables cache the processor
87 * register values for reading.
88 *
89 * The initial value of the shadow registers at lpm creation is
90 * PS3_LPM_SHADOW_REG_INIT.
91 */
92
93 struct ps3_lpm_shadow_regs {
94 u64 pm_control;
95 u64 pm_start_stop;
96 u64 group_control;
97 u64 debug_bus_control;
98 };
99
100 #define PS3_LPM_SHADOW_REG_INIT 0xFFFFFFFF00000000ULL
101
102 /**
103 * struct ps3_lpm_priv - Private lpm device data.
104 *
105 * @open: An atomic variable indicating the lpm driver has been opened.
106 * @rights: The lpm rigths granted by the system policy module. A logical
107 * OR of enum ps3_lpm_rights.
108 * @node_id: The node id of a BE prosessor whose performance monitor this
109 * lpar has the right to use.
110 * @pu_id: The lv1 id of the logical PU.
111 * @lpm_id: The lv1 id of this lpm instance.
112 * @outlet_id: The outlet created by lv1 for this lpm instance.
113 * @tb_count: The number of bytes of data held in the lv1 trace buffer.
114 * @tb_cache: Kernel buffer to receive the data from the lv1 trace buffer.
115 * Must be 128 byte aligned.
116 * @tb_cache_size: Size of the kernel @tb_cache buffer. Must be 128 byte
117 * aligned.
118 * @tb_cache_internal: An unaligned buffer allocated by this driver to be
119 * used for the trace buffer cache when ps3_lpm_open() is called with a
120 * NULL tb_cache argument. Otherwise unused.
121 * @shadow: Processor register shadow of type struct ps3_lpm_shadow_regs.
122 * @sbd: The struct ps3_system_bus_device attached to this driver.
123 *
124 * The trace buffer is a buffer allocated and used internally to the lv1
125 * hypervisor to collect trace data. The trace buffer cache is a guest
126 * buffer that accepts the trace data from the trace buffer.
127 */
128
129 struct ps3_lpm_priv {
130 atomic_t open;
131 u64 rights;
132 u64 node_id;
133 u64 pu_id;
134 u64 lpm_id;
135 u64 outlet_id;
136 u64 tb_count;
137 void *tb_cache;
138 u64 tb_cache_size;
139 void *tb_cache_internal;
140 struct ps3_lpm_shadow_regs shadow;
141 struct ps3_system_bus_device *sbd;
142 };
143
144 enum {
145 PS3_LPM_DEFAULT_TB_CACHE_SIZE = 0x4000,
146 };
147
148 /**
149 * lpm_priv - Static instance of the lpm data.
150 *
151 * Since the exported routines don't support the notion of a device
152 * instance we need to hold the instance in this static variable
153 * and then only allow at most one instance at a time to be created.
154 */
155
156 static struct ps3_lpm_priv *lpm_priv;
157
158 static struct device *sbd_core(void)
159 {
160 BUG_ON(!lpm_priv || !lpm_priv->sbd);
161 return &lpm_priv->sbd->core;
162 }
163
164 /**
165 * use_start_stop_bookmark - Enable the PPU bookmark trace.
166 *
167 * And it enables PPU bookmark triggers ONLY if the other triggers are not set.
168 * The start/stop bookmarks are inserted at ps3_enable_pm() and ps3_disable_pm()
169 * to start/stop LPM.
170 *
171 * Used to get good quality of the performance counter.
172 */
173
174 enum {use_start_stop_bookmark = 1,};
175
176 void ps3_set_bookmark(u64 bookmark)
177 {
178 /*
179 * As per the PPE book IV, to avoid bookmark loss there must
180 * not be a traced branch within 10 cycles of setting the
181 * SPRN_BKMK register. The actual text is unclear if 'within'
182 * includes cycles before the call.
183 */
184
185 asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;");
186 mtspr(SPRN_BKMK, bookmark);
187 asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;");
188 }
189 EXPORT_SYMBOL_GPL(ps3_set_bookmark);
190
191 void ps3_set_pm_bookmark(u64 tag, u64 incident, u64 th_id)
192 {
193 u64 bookmark;
194
195 bookmark = (get_tb() & 0x00000000FFFFFFFFULL) |
196 PS3_PM_BOOKMARK_TAG_KERNEL;
197 bookmark = ((tag << 56) & PS3_PM_BOOKMARK_TAG_MASK_LO) |
198 (incident << 48) | (th_id << 32) | bookmark;
199 ps3_set_bookmark(bookmark);
200 }
201 EXPORT_SYMBOL_GPL(ps3_set_pm_bookmark);
202
203 /**
204 * ps3_read_phys_ctr - Read physical counter registers.
205 *
206 * Each physical counter can act as one 32 bit counter or as two 16 bit
207 * counters.
208 */
209
210 u32 ps3_read_phys_ctr(u32 cpu, u32 phys_ctr)
211 {
212 int result;
213 u64 counter0415;
214 u64 counter2637;
215
216 if (phys_ctr >= NR_PHYS_CTRS) {
217 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
218 __LINE__, phys_ctr);
219 return 0;
220 }
221
222 result = lv1_set_lpm_counter(lpm_priv->lpm_id, 0, 0, 0, 0, &counter0415,
223 &counter2637);
224 if (result) {
225 dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter failed: "
226 "phys_ctr %u, %s\n", __func__, __LINE__, phys_ctr,
227 ps3_result(result));
228 return 0;
229 }
230
231 switch (phys_ctr) {
232 case 0:
233 return counter0415 >> 32;
234 case 1:
235 return counter0415 & PS3_PM_COUNTER_MASK_LO;
236 case 2:
237 return counter2637 >> 32;
238 case 3:
239 return counter2637 & PS3_PM_COUNTER_MASK_LO;
240 default:
241 BUG();
242 }
243 return 0;
244 }
245 EXPORT_SYMBOL_GPL(ps3_read_phys_ctr);
246
247 /**
248 * ps3_write_phys_ctr - Write physical counter registers.
249 *
250 * Each physical counter can act as one 32 bit counter or as two 16 bit
251 * counters.
252 */
253
254 void ps3_write_phys_ctr(u32 cpu, u32 phys_ctr, u32 val)
255 {
256 u64 counter0415;
257 u64 counter0415_mask;
258 u64 counter2637;
259 u64 counter2637_mask;
260 int result;
261
262 if (phys_ctr >= NR_PHYS_CTRS) {
263 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
264 __LINE__, phys_ctr);
265 return;
266 }
267
268 switch (phys_ctr) {
269 case 0:
270 counter0415 = (u64)val << 32;
271 counter0415_mask = PS3_PM_COUNTER_MASK_HI;
272 counter2637 = 0x0;
273 counter2637_mask = 0x0;
274 break;
275 case 1:
276 counter0415 = (u64)val;
277 counter0415_mask = PS3_PM_COUNTER_MASK_LO;
278 counter2637 = 0x0;
279 counter2637_mask = 0x0;
280 break;
281 case 2:
282 counter0415 = 0x0;
283 counter0415_mask = 0x0;
284 counter2637 = (u64)val << 32;
285 counter2637_mask = PS3_PM_COUNTER_MASK_HI;
286 break;
287 case 3:
288 counter0415 = 0x0;
289 counter0415_mask = 0x0;
290 counter2637 = (u64)val;
291 counter2637_mask = PS3_PM_COUNTER_MASK_LO;
292 break;
293 default:
294 BUG();
295 }
296
297 result = lv1_set_lpm_counter(lpm_priv->lpm_id,
298 counter0415, counter0415_mask,
299 counter2637, counter2637_mask,
300 &counter0415, &counter2637);
301 if (result)
302 dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter failed: "
303 "phys_ctr %u, val %u, %s\n", __func__, __LINE__,
304 phys_ctr, val, ps3_result(result));
305 }
306 EXPORT_SYMBOL_GPL(ps3_write_phys_ctr);
307
308 /**
309 * ps3_read_ctr - Read counter.
310 *
311 * Read 16 or 32 bits depending on the current size of the counter.
312 * Counters 4, 5, 6 & 7 are always 16 bit.
313 */
314
315 u32 ps3_read_ctr(u32 cpu, u32 ctr)
316 {
317 u32 val;
318 u32 phys_ctr = ctr & (NR_PHYS_CTRS - 1);
319
320 val = ps3_read_phys_ctr(cpu, phys_ctr);
321
322 if (ps3_get_ctr_size(cpu, phys_ctr) == 16)
323 val = (ctr < NR_PHYS_CTRS) ? (val >> 16) : (val & 0xffff);
324
325 return val;
326 }
327 EXPORT_SYMBOL_GPL(ps3_read_ctr);
328
329 /**
330 * ps3_write_ctr - Write counter.
331 *
332 * Write 16 or 32 bits depending on the current size of the counter.
333 * Counters 4, 5, 6 & 7 are always 16 bit.
334 */
335
336 void ps3_write_ctr(u32 cpu, u32 ctr, u32 val)
337 {
338 u32 phys_ctr;
339 u32 phys_val;
340
341 phys_ctr = ctr & (NR_PHYS_CTRS - 1);
342
343 if (ps3_get_ctr_size(cpu, phys_ctr) == 16) {
344 phys_val = ps3_read_phys_ctr(cpu, phys_ctr);
345
346 if (ctr < NR_PHYS_CTRS)
347 val = (val << 16) | (phys_val & 0xffff);
348 else
349 val = (val & 0xffff) | (phys_val & 0xffff0000);
350 }
351
352 ps3_write_phys_ctr(cpu, phys_ctr, val);
353 }
354 EXPORT_SYMBOL_GPL(ps3_write_ctr);
355
356 /**
357 * ps3_read_pm07_control - Read counter control registers.
358 *
359 * Each logical counter has a corresponding control register.
360 */
361
362 u32 ps3_read_pm07_control(u32 cpu, u32 ctr)
363 {
364 return 0;
365 }
366 EXPORT_SYMBOL_GPL(ps3_read_pm07_control);
367
368 /**
369 * ps3_write_pm07_control - Write counter control registers.
370 *
371 * Each logical counter has a corresponding control register.
372 */
373
374 void ps3_write_pm07_control(u32 cpu, u32 ctr, u32 val)
375 {
376 int result;
377 static const u64 mask = 0xFFFFFFFFFFFFFFFFULL;
378 u64 old_value;
379
380 if (ctr >= NR_CTRS) {
381 dev_dbg(sbd_core(), "%s:%u: ctr too big: %u\n", __func__,
382 __LINE__, ctr);
383 return;
384 }
385
386 result = lv1_set_lpm_counter_control(lpm_priv->lpm_id, ctr, val, mask,
387 &old_value);
388 if (result)
389 dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter_control "
390 "failed: ctr %u, %s\n", __func__, __LINE__, ctr,
391 ps3_result(result));
392 }
393 EXPORT_SYMBOL_GPL(ps3_write_pm07_control);
394
395 /**
396 * ps3_read_pm - Read Other LPM control registers.
397 */
398
399 u32 ps3_read_pm(u32 cpu, enum pm_reg_name reg)
400 {
401 int result = 0;
402 u64 val = 0;
403
404 switch (reg) {
405 case pm_control:
406 return lpm_priv->shadow.pm_control;
407 case trace_address:
408 return CBE_PM_TRACE_BUF_EMPTY;
409 case pm_start_stop:
410 return lpm_priv->shadow.pm_start_stop;
411 case pm_interval:
412 result = lv1_set_lpm_interval(lpm_priv->lpm_id, 0, 0, &val);
413 if (result) {
414 val = 0;
415 dev_dbg(sbd_core(), "%s:%u: lv1 set_inteval failed: "
416 "reg %u, %s\n", __func__, __LINE__, reg,
417 ps3_result(result));
418 }
419 return (u32)val;
420 case group_control:
421 return lpm_priv->shadow.group_control;
422 case debug_bus_control:
423 return lpm_priv->shadow.debug_bus_control;
424 case pm_status:
425 result = lv1_get_lpm_interrupt_status(lpm_priv->lpm_id,
426 &val);
427 if (result) {
428 val = 0;
429 dev_dbg(sbd_core(), "%s:%u: lv1 get_lpm_status failed: "
430 "reg %u, %s\n", __func__, __LINE__, reg,
431 ps3_result(result));
432 }
433 return (u32)val;
434 case ext_tr_timer:
435 return 0;
436 default:
437 dev_dbg(sbd_core(), "%s:%u: unknown reg: %d\n", __func__,
438 __LINE__, reg);
439 BUG();
440 break;
441 }
442
443 return 0;
444 }
445 EXPORT_SYMBOL_GPL(ps3_read_pm);
446
447 /**
448 * ps3_write_pm - Write Other LPM control registers.
449 */
450
451 void ps3_write_pm(u32 cpu, enum pm_reg_name reg, u32 val)
452 {
453 int result = 0;
454 u64 dummy;
455
456 switch (reg) {
457 case group_control:
458 if (val != lpm_priv->shadow.group_control)
459 result = lv1_set_lpm_group_control(lpm_priv->lpm_id,
460 val,
461 PS3_WRITE_PM_MASK,
462 &dummy);
463 lpm_priv->shadow.group_control = val;
464 break;
465 case debug_bus_control:
466 if (val != lpm_priv->shadow.debug_bus_control)
467 result = lv1_set_lpm_debug_bus_control(lpm_priv->lpm_id,
468 val,
469 PS3_WRITE_PM_MASK,
470 &dummy);
471 lpm_priv->shadow.debug_bus_control = val;
472 break;
473 case pm_control:
474 if (use_start_stop_bookmark)
475 val |= (PS3_PM_CONTROL_PPU_TH0_BOOKMARK |
476 PS3_PM_CONTROL_PPU_TH1_BOOKMARK);
477 if (val != lpm_priv->shadow.pm_control)
478 result = lv1_set_lpm_general_control(lpm_priv->lpm_id,
479 val,
480 PS3_WRITE_PM_MASK,
481 0, 0, &dummy,
482 &dummy);
483 lpm_priv->shadow.pm_control = val;
484 break;
485 case pm_interval:
486 result = lv1_set_lpm_interval(lpm_priv->lpm_id, val,
487 PS3_WRITE_PM_MASK, &dummy);
488 break;
489 case pm_start_stop:
490 if (val != lpm_priv->shadow.pm_start_stop)
491 result = lv1_set_lpm_trigger_control(lpm_priv->lpm_id,
492 val,
493 PS3_WRITE_PM_MASK,
494 &dummy);
495 lpm_priv->shadow.pm_start_stop = val;
496 break;
497 case trace_address:
498 case ext_tr_timer:
499 case pm_status:
500 break;
501 default:
502 dev_dbg(sbd_core(), "%s:%u: unknown reg: %d\n", __func__,
503 __LINE__, reg);
504 BUG();
505 break;
506 }
507
508 if (result)
509 dev_err(sbd_core(), "%s:%u: lv1 set_control failed: "
510 "reg %u, %s\n", __func__, __LINE__, reg,
511 ps3_result(result));
512 }
513 EXPORT_SYMBOL_GPL(ps3_write_pm);
514
515 /**
516 * ps3_get_ctr_size - Get the size of a physical counter.
517 *
518 * Returns either 16 or 32.
519 */
520
521 u32 ps3_get_ctr_size(u32 cpu, u32 phys_ctr)
522 {
523 u32 pm_ctrl;
524
525 if (phys_ctr >= NR_PHYS_CTRS) {
526 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
527 __LINE__, phys_ctr);
528 return 0;
529 }
530
531 pm_ctrl = ps3_read_pm(cpu, pm_control);
532 return (pm_ctrl & CBE_PM_16BIT_CTR(phys_ctr)) ? 16 : 32;
533 }
534 EXPORT_SYMBOL_GPL(ps3_get_ctr_size);
535
536 /**
537 * ps3_set_ctr_size - Set the size of a physical counter to 16 or 32 bits.
538 */
539
540 void ps3_set_ctr_size(u32 cpu, u32 phys_ctr, u32 ctr_size)
541 {
542 u32 pm_ctrl;
543
544 if (phys_ctr >= NR_PHYS_CTRS) {
545 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
546 __LINE__, phys_ctr);
547 return;
548 }
549
550 pm_ctrl = ps3_read_pm(cpu, pm_control);
551
552 switch (ctr_size) {
553 case 16:
554 pm_ctrl |= CBE_PM_16BIT_CTR(phys_ctr);
555 ps3_write_pm(cpu, pm_control, pm_ctrl);
556 break;
557
558 case 32:
559 pm_ctrl &= ~CBE_PM_16BIT_CTR(phys_ctr);
560 ps3_write_pm(cpu, pm_control, pm_ctrl);
561 break;
562 default:
563 BUG();
564 }
565 }
566 EXPORT_SYMBOL_GPL(ps3_set_ctr_size);
567
568 static u64 pm_translate_signal_group_number_on_island2(u64 subgroup)
569 {
570
571 if (subgroup == 2)
572 subgroup = 3;
573
574 if (subgroup <= 6)
575 return PM_ISLAND2_BASE_SIGNAL_GROUP_NUMBER + subgroup;
576 else if (subgroup == 7)
577 return PM_ISLAND2_SIGNAL_GROUP_NUMBER1;
578 else
579 return PM_ISLAND2_SIGNAL_GROUP_NUMBER2;
580 }
581
582 static u64 pm_translate_signal_group_number_on_island3(u64 subgroup)
583 {
584
585 switch (subgroup) {
586 case 2:
587 case 3:
588 case 4:
589 subgroup += 2;
590 break;
591 case 5:
592 subgroup = 8;
593 break;
594 default:
595 break;
596 }
597 return PM_ISLAND3_BASE_SIGNAL_GROUP_NUMBER + subgroup;
598 }
599
600 static u64 pm_translate_signal_group_number_on_island4(u64 subgroup)
601 {
602 return PM_ISLAND4_BASE_SIGNAL_GROUP_NUMBER + subgroup;
603 }
604
605 static u64 pm_translate_signal_group_number_on_island5(u64 subgroup)
606 {
607
608 switch (subgroup) {
609 case 3:
610 subgroup = 4;
611 break;
612 case 4:
613 subgroup = 6;
614 break;
615 default:
616 break;
617 }
618 return PM_ISLAND5_BASE_SIGNAL_GROUP_NUMBER + subgroup;
619 }
620
621 static u64 pm_translate_signal_group_number_on_island6(u64 subgroup,
622 u64 subsubgroup)
623 {
624 switch (subgroup) {
625 case 3:
626 case 4:
627 case 5:
628 subgroup += 1;
629 break;
630 default:
631 break;
632 }
633
634 switch (subsubgroup) {
635 case 4:
636 case 5:
637 case 6:
638 subsubgroup += 2;
639 break;
640 case 7:
641 case 8:
642 case 9:
643 case 10:
644 subsubgroup += 4;
645 break;
646 case 11:
647 case 12:
648 case 13:
649 subsubgroup += 5;
650 break;
651 default:
652 break;
653 }
654
655 if (subgroup <= 5)
656 return (PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER + subgroup);
657 else
658 return (PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER + subgroup
659 + subsubgroup - 1);
660 }
661
662 static u64 pm_translate_signal_group_number_on_island7(u64 subgroup)
663 {
664 return PM_ISLAND7_BASE_SIGNAL_GROUP_NUMBER + subgroup;
665 }
666
667 static u64 pm_translate_signal_group_number_on_island8(u64 subgroup)
668 {
669 return PM_ISLAND8_BASE_SIGNAL_GROUP_NUMBER + subgroup;
670 }
671
672 static u64 pm_signal_group_to_ps3_lv1_signal_group(u64 group)
673 {
674 u64 island;
675 u64 subgroup;
676 u64 subsubgroup;
677
678 subgroup = 0;
679 subsubgroup = 0;
680 island = 0;
681 if (group < 1000) {
682 if (group < 100) {
683 if (20 <= group && group < 30) {
684 island = 2;
685 subgroup = group - 20;
686 } else if (30 <= group && group < 40) {
687 island = 3;
688 subgroup = group - 30;
689 } else if (40 <= group && group < 50) {
690 island = 4;
691 subgroup = group - 40;
692 } else if (50 <= group && group < 60) {
693 island = 5;
694 subgroup = group - 50;
695 } else if (60 <= group && group < 70) {
696 island = 6;
697 subgroup = group - 60;
698 } else if (70 <= group && group < 80) {
699 island = 7;
700 subgroup = group - 70;
701 } else if (80 <= group && group < 90) {
702 island = 8;
703 subgroup = group - 80;
704 }
705 } else if (200 <= group && group < 300) {
706 island = 2;
707 subgroup = group - 200;
708 } else if (600 <= group && group < 700) {
709 island = 6;
710 subgroup = 5;
711 subsubgroup = group - 650;
712 }
713 } else if (6000 <= group && group < 7000) {
714 island = 6;
715 subgroup = 5;
716 subsubgroup = group - 6500;
717 }
718
719 switch (island) {
720 case 2:
721 return pm_translate_signal_group_number_on_island2(subgroup);
722 case 3:
723 return pm_translate_signal_group_number_on_island3(subgroup);
724 case 4:
725 return pm_translate_signal_group_number_on_island4(subgroup);
726 case 5:
727 return pm_translate_signal_group_number_on_island5(subgroup);
728 case 6:
729 return pm_translate_signal_group_number_on_island6(subgroup,
730 subsubgroup);
731 case 7:
732 return pm_translate_signal_group_number_on_island7(subgroup);
733 case 8:
734 return pm_translate_signal_group_number_on_island8(subgroup);
735 default:
736 dev_dbg(sbd_core(), "%s:%u: island not found: %llu\n", __func__,
737 __LINE__, group);
738 BUG();
739 break;
740 }
741 return 0;
742 }
743
744 static u64 pm_bus_word_to_ps3_lv1_bus_word(u8 word)
745 {
746
747 switch (word) {
748 case 1:
749 return 0xF000;
750 case 2:
751 return 0x0F00;
752 case 4:
753 return 0x00F0;
754 case 8:
755 default:
756 return 0x000F;
757 }
758 }
759
760 static int __ps3_set_signal(u64 lv1_signal_group, u64 bus_select,
761 u64 signal_select, u64 attr1, u64 attr2, u64 attr3)
762 {
763 int ret;
764
765 ret = lv1_set_lpm_signal(lpm_priv->lpm_id, lv1_signal_group, bus_select,
766 signal_select, attr1, attr2, attr3);
767 if (ret)
768 dev_err(sbd_core(),
769 "%s:%u: error:%d 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx\n",
770 __func__, __LINE__, ret, lv1_signal_group, bus_select,
771 signal_select, attr1, attr2, attr3);
772
773 return ret;
774 }
775
776 int ps3_set_signal(u64 signal_group, u8 signal_bit, u16 sub_unit,
777 u8 bus_word)
778 {
779 int ret;
780 u64 lv1_signal_group;
781 u64 bus_select;
782 u64 signal_select;
783 u64 attr1, attr2, attr3;
784
785 if (signal_group == 0)
786 return __ps3_set_signal(0, 0, 0, 0, 0, 0);
787
788 lv1_signal_group =
789 pm_signal_group_to_ps3_lv1_signal_group(signal_group);
790 bus_select = pm_bus_word_to_ps3_lv1_bus_word(bus_word);
791
792 switch (signal_group) {
793 case PM_SIG_GROUP_SPU_TRIGGER:
794 signal_select = 1;
795 signal_select = signal_select << (63 - signal_bit);
796 break;
797 case PM_SIG_GROUP_SPU_EVENT:
798 signal_select = 1;
799 signal_select = (signal_select << (63 - signal_bit)) | 0x3;
800 break;
801 default:
802 signal_select = 0;
803 break;
804 }
805
806 /*
807 * 0: physical object.
808 * 1: logical object.
809 * This parameter is only used for the PPE and SPE signals.
810 */
811 attr1 = 1;
812
813 /*
814 * This parameter is used to specify the target physical/logical
815 * PPE/SPE object.
816 */
817 if (PM_SIG_GROUP_SPU <= signal_group &&
818 signal_group < PM_SIG_GROUP_MFC_MAX)
819 attr2 = sub_unit;
820 else
821 attr2 = lpm_priv->pu_id;
822
823 /*
824 * This parameter is only used for setting the SPE signal.
825 */
826 attr3 = 0;
827
828 ret = __ps3_set_signal(lv1_signal_group, bus_select, signal_select,
829 attr1, attr2, attr3);
830 if (ret)
831 dev_err(sbd_core(), "%s:%u: __ps3_set_signal failed: %d\n",
832 __func__, __LINE__, ret);
833
834 return ret;
835 }
836 EXPORT_SYMBOL_GPL(ps3_set_signal);
837
838 u32 ps3_get_hw_thread_id(int cpu)
839 {
840 return get_hard_smp_processor_id(cpu);
841 }
842 EXPORT_SYMBOL_GPL(ps3_get_hw_thread_id);
843
844 /**
845 * ps3_enable_pm - Enable the entire performance monitoring unit.
846 *
847 * When we enable the LPM, all pending writes to counters get committed.
848 */
849
850 void ps3_enable_pm(u32 cpu)
851 {
852 int result;
853 u64 tmp;
854 int insert_bookmark = 0;
855
856 lpm_priv->tb_count = 0;
857
858 if (use_start_stop_bookmark) {
859 if (!(lpm_priv->shadow.pm_start_stop &
860 (PS3_PM_START_STOP_START_MASK
861 | PS3_PM_START_STOP_STOP_MASK))) {
862 result = lv1_set_lpm_trigger_control(lpm_priv->lpm_id,
863 (PS3_PM_START_STOP_PPU_TH0_BOOKMARK_START |
864 PS3_PM_START_STOP_PPU_TH1_BOOKMARK_START |
865 PS3_PM_START_STOP_PPU_TH0_BOOKMARK_STOP |
866 PS3_PM_START_STOP_PPU_TH1_BOOKMARK_STOP),
867 0xFFFFFFFFFFFFFFFFULL, &tmp);
868
869 if (result)
870 dev_err(sbd_core(), "%s:%u: "
871 "lv1_set_lpm_trigger_control failed: "
872 "%s\n", __func__, __LINE__,
873 ps3_result(result));
874
875 insert_bookmark = !result;
876 }
877 }
878
879 result = lv1_start_lpm(lpm_priv->lpm_id);
880
881 if (result)
882 dev_err(sbd_core(), "%s:%u: lv1_start_lpm failed: %s\n",
883 __func__, __LINE__, ps3_result(result));
884
885 if (use_start_stop_bookmark && !result && insert_bookmark)
886 ps3_set_bookmark(get_tb() | PS3_PM_BOOKMARK_START);
887 }
888 EXPORT_SYMBOL_GPL(ps3_enable_pm);
889
890 /**
891 * ps3_disable_pm - Disable the entire performance monitoring unit.
892 */
893
894 void ps3_disable_pm(u32 cpu)
895 {
896 int result;
897 u64 tmp;
898
899 ps3_set_bookmark(get_tb() | PS3_PM_BOOKMARK_STOP);
900
901 result = lv1_stop_lpm(lpm_priv->lpm_id, &tmp);
902
903 if (result) {
904 if(result != LV1_WRONG_STATE)
905 dev_err(sbd_core(), "%s:%u: lv1_stop_lpm failed: %s\n",
906 __func__, __LINE__, ps3_result(result));
907 return;
908 }
909
910 lpm_priv->tb_count = tmp;
911
912 dev_dbg(sbd_core(), "%s:%u: tb_count %llu (%llxh)\n", __func__, __LINE__,
913 lpm_priv->tb_count, lpm_priv->tb_count);
914 }
915 EXPORT_SYMBOL_GPL(ps3_disable_pm);
916
917 /**
918 * ps3_lpm_copy_tb - Copy data from the trace buffer to a kernel buffer.
919 * @offset: Offset in bytes from the start of the trace buffer.
920 * @buf: Copy destination.
921 * @count: Maximum count of bytes to copy.
922 * @bytes_copied: Pointer to a variable that will receive the number of
923 * bytes copied to @buf.
924 *
925 * On error @buf will contain any successfully copied trace buffer data
926 * and bytes_copied will be set to the number of bytes successfully copied.
927 */
928
929 int ps3_lpm_copy_tb(unsigned long offset, void *buf, unsigned long count,
930 unsigned long *bytes_copied)
931 {
932 int result;
933
934 *bytes_copied = 0;
935
936 if (!lpm_priv->tb_cache)
937 return -EPERM;
938
939 if (offset >= lpm_priv->tb_count)
940 return 0;
941
942 count = min_t(u64, count, lpm_priv->tb_count - offset);
943
944 while (*bytes_copied < count) {
945 const unsigned long request = count - *bytes_copied;
946 u64 tmp;
947
948 result = lv1_copy_lpm_trace_buffer(lpm_priv->lpm_id, offset,
949 request, &tmp);
950 if (result) {
951 dev_dbg(sbd_core(), "%s:%u: 0x%lx bytes at 0x%lx\n",
952 __func__, __LINE__, request, offset);
953
954 dev_err(sbd_core(), "%s:%u: lv1_copy_lpm_trace_buffer "
955 "failed: %s\n", __func__, __LINE__,
956 ps3_result(result));
957 return result == LV1_WRONG_STATE ? -EBUSY : -EINVAL;
958 }
959
960 memcpy(buf, lpm_priv->tb_cache, tmp);
961 buf += tmp;
962 *bytes_copied += tmp;
963 offset += tmp;
964 }
965 dev_dbg(sbd_core(), "%s:%u: copied %lxh bytes\n", __func__, __LINE__,
966 *bytes_copied);
967
968 return 0;
969 }
970 EXPORT_SYMBOL_GPL(ps3_lpm_copy_tb);
971
972 /**
973 * ps3_lpm_copy_tb_to_user - Copy data from the trace buffer to a user buffer.
974 * @offset: Offset in bytes from the start of the trace buffer.
975 * @buf: A __user copy destination.
976 * @count: Maximum count of bytes to copy.
977 * @bytes_copied: Pointer to a variable that will receive the number of
978 * bytes copied to @buf.
979 *
980 * On error @buf will contain any successfully copied trace buffer data
981 * and bytes_copied will be set to the number of bytes successfully copied.
982 */
983
984 int ps3_lpm_copy_tb_to_user(unsigned long offset, void __user *buf,
985 unsigned long count, unsigned long *bytes_copied)
986 {
987 int result;
988
989 *bytes_copied = 0;
990
991 if (!lpm_priv->tb_cache)
992 return -EPERM;
993
994 if (offset >= lpm_priv->tb_count)
995 return 0;
996
997 count = min_t(u64, count, lpm_priv->tb_count - offset);
998
999 while (*bytes_copied < count) {
1000 const unsigned long request = count - *bytes_copied;
1001 u64 tmp;
1002
1003 result = lv1_copy_lpm_trace_buffer(lpm_priv->lpm_id, offset,
1004 request, &tmp);
1005 if (result) {
1006 dev_dbg(sbd_core(), "%s:%u: 0x%lx bytes at 0x%lx\n",
1007 __func__, __LINE__, request, offset);
1008 dev_err(sbd_core(), "%s:%u: lv1_copy_lpm_trace_buffer "
1009 "failed: %s\n", __func__, __LINE__,
1010 ps3_result(result));
1011 return result == LV1_WRONG_STATE ? -EBUSY : -EINVAL;
1012 }
1013
1014 result = copy_to_user(buf, lpm_priv->tb_cache, tmp);
1015
1016 if (result) {
1017 dev_dbg(sbd_core(), "%s:%u: 0x%llx bytes at 0x%p\n",
1018 __func__, __LINE__, tmp, buf);
1019 dev_err(sbd_core(), "%s:%u: copy_to_user failed: %d\n",
1020 __func__, __LINE__, result);
1021 return -EFAULT;
1022 }
1023
1024 buf += tmp;
1025 *bytes_copied += tmp;
1026 offset += tmp;
1027 }
1028 dev_dbg(sbd_core(), "%s:%u: copied %lxh bytes\n", __func__, __LINE__,
1029 *bytes_copied);
1030
1031 return 0;
1032 }
1033 EXPORT_SYMBOL_GPL(ps3_lpm_copy_tb_to_user);
1034
1035 /**
1036 * ps3_get_and_clear_pm_interrupts -
1037 *
1038 * Clearing interrupts for the entire performance monitoring unit.
1039 * Reading pm_status clears the interrupt bits.
1040 */
1041
1042 u32 ps3_get_and_clear_pm_interrupts(u32 cpu)
1043 {
1044 return ps3_read_pm(cpu, pm_status);
1045 }
1046 EXPORT_SYMBOL_GPL(ps3_get_and_clear_pm_interrupts);
1047
1048 /**
1049 * ps3_enable_pm_interrupts -
1050 *
1051 * Enabling interrupts for the entire performance monitoring unit.
1052 * Enables the interrupt bits in the pm_status register.
1053 */
1054
1055 void ps3_enable_pm_interrupts(u32 cpu, u32 thread, u32 mask)
1056 {
1057 if (mask)
1058 ps3_write_pm(cpu, pm_status, mask);
1059 }
1060 EXPORT_SYMBOL_GPL(ps3_enable_pm_interrupts);
1061
1062 /**
1063 * ps3_enable_pm_interrupts -
1064 *
1065 * Disabling interrupts for the entire performance monitoring unit.
1066 */
1067
1068 void ps3_disable_pm_interrupts(u32 cpu)
1069 {
1070 ps3_get_and_clear_pm_interrupts(cpu);
1071 ps3_write_pm(cpu, pm_status, 0);
1072 }
1073 EXPORT_SYMBOL_GPL(ps3_disable_pm_interrupts);
1074
1075 /**
1076 * ps3_lpm_open - Open the logical performance monitor device.
1077 * @tb_type: Specifies the type of trace buffer lv1 should use for this lpm
1078 * instance, specified by one of enum ps3_lpm_tb_type.
1079 * @tb_cache: Optional user supplied buffer to use as the trace buffer cache.
1080 * If NULL, the driver will allocate and manage an internal buffer.
1081 * Unused when when @tb_type is PS3_LPM_TB_TYPE_NONE.
1082 * @tb_cache_size: The size in bytes of the user supplied @tb_cache buffer.
1083 * Unused when @tb_cache is NULL or @tb_type is PS3_LPM_TB_TYPE_NONE.
1084 */
1085
1086 int ps3_lpm_open(enum ps3_lpm_tb_type tb_type, void *tb_cache,
1087 u64 tb_cache_size)
1088 {
1089 int result;
1090 u64 tb_size;
1091
1092 BUG_ON(!lpm_priv);
1093 BUG_ON(tb_type != PS3_LPM_TB_TYPE_NONE
1094 && tb_type != PS3_LPM_TB_TYPE_INTERNAL);
1095
1096 if (tb_type == PS3_LPM_TB_TYPE_NONE && tb_cache)
1097 dev_dbg(sbd_core(), "%s:%u: bad in vals\n", __func__, __LINE__);
1098
1099 if (!atomic_add_unless(&lpm_priv->open, 1, 1)) {
1100 dev_dbg(sbd_core(), "%s:%u: busy\n", __func__, __LINE__);
1101 return -EBUSY;
1102 }
1103
1104 /* Note tb_cache needs 128 byte alignment. */
1105
1106 if (tb_type == PS3_LPM_TB_TYPE_NONE) {
1107 lpm_priv->tb_cache_size = 0;
1108 lpm_priv->tb_cache_internal = NULL;
1109 lpm_priv->tb_cache = NULL;
1110 } else if (tb_cache) {
1111 if (tb_cache != (void *)_ALIGN_UP((unsigned long)tb_cache, 128)
1112 || tb_cache_size != _ALIGN_UP(tb_cache_size, 128)) {
1113 dev_err(sbd_core(), "%s:%u: unaligned tb_cache\n",
1114 __func__, __LINE__);
1115 result = -EINVAL;
1116 goto fail_align;
1117 }
1118 lpm_priv->tb_cache_size = tb_cache_size;
1119 lpm_priv->tb_cache_internal = NULL;
1120 lpm_priv->tb_cache = tb_cache;
1121 } else {
1122 lpm_priv->tb_cache_size = PS3_LPM_DEFAULT_TB_CACHE_SIZE;
1123 lpm_priv->tb_cache_internal = kzalloc(
1124 lpm_priv->tb_cache_size + 127, GFP_KERNEL);
1125 if (!lpm_priv->tb_cache_internal) {
1126 dev_err(sbd_core(), "%s:%u: alloc internal tb_cache "
1127 "failed\n", __func__, __LINE__);
1128 result = -ENOMEM;
1129 goto fail_malloc;
1130 }
1131 lpm_priv->tb_cache = (void *)_ALIGN_UP(
1132 (unsigned long)lpm_priv->tb_cache_internal, 128);
1133 }
1134
1135 result = lv1_construct_lpm(lpm_priv->node_id, tb_type, 0, 0,
1136 ps3_mm_phys_to_lpar(__pa(lpm_priv->tb_cache)),
1137 lpm_priv->tb_cache_size, &lpm_priv->lpm_id,
1138 &lpm_priv->outlet_id, &tb_size);
1139
1140 if (result) {
1141 dev_err(sbd_core(), "%s:%u: lv1_construct_lpm failed: %s\n",
1142 __func__, __LINE__, ps3_result(result));
1143 result = -EINVAL;
1144 goto fail_construct;
1145 }
1146
1147 lpm_priv->shadow.pm_control = PS3_LPM_SHADOW_REG_INIT;
1148 lpm_priv->shadow.pm_start_stop = PS3_LPM_SHADOW_REG_INIT;
1149 lpm_priv->shadow.group_control = PS3_LPM_SHADOW_REG_INIT;
1150 lpm_priv->shadow.debug_bus_control = PS3_LPM_SHADOW_REG_INIT;
1151
1152 dev_dbg(sbd_core(), "%s:%u: lpm_id 0x%llx, outlet_id 0x%llx, "
1153 "tb_size 0x%llx\n", __func__, __LINE__, lpm_priv->lpm_id,
1154 lpm_priv->outlet_id, tb_size);
1155
1156 return 0;
1157
1158 fail_construct:
1159 kfree(lpm_priv->tb_cache_internal);
1160 lpm_priv->tb_cache_internal = NULL;
1161 fail_malloc:
1162 fail_align:
1163 atomic_dec(&lpm_priv->open);
1164 return result;
1165 }
1166 EXPORT_SYMBOL_GPL(ps3_lpm_open);
1167
1168 /**
1169 * ps3_lpm_close - Close the lpm device.
1170 *
1171 */
1172
1173 int ps3_lpm_close(void)
1174 {
1175 dev_dbg(sbd_core(), "%s:%u\n", __func__, __LINE__);
1176
1177 lv1_destruct_lpm(lpm_priv->lpm_id);
1178 lpm_priv->lpm_id = 0;
1179
1180 kfree(lpm_priv->tb_cache_internal);
1181 lpm_priv->tb_cache_internal = NULL;
1182
1183 atomic_dec(&lpm_priv->open);
1184 return 0;
1185 }
1186 EXPORT_SYMBOL_GPL(ps3_lpm_close);
1187
1188 static int __devinit ps3_lpm_probe(struct ps3_system_bus_device *dev)
1189 {
1190 dev_dbg(&dev->core, " -> %s:%u\n", __func__, __LINE__);
1191
1192 if (lpm_priv) {
1193 dev_info(&dev->core, "%s:%u: called twice\n",
1194 __func__, __LINE__);
1195 return -EBUSY;
1196 }
1197
1198 lpm_priv = kzalloc(sizeof(*lpm_priv), GFP_KERNEL);
1199
1200 if (!lpm_priv)
1201 return -ENOMEM;
1202
1203 lpm_priv->sbd = dev;
1204 lpm_priv->node_id = dev->lpm.node_id;
1205 lpm_priv->pu_id = dev->lpm.pu_id;
1206 lpm_priv->rights = dev->lpm.rights;
1207
1208 dev_info(&dev->core, " <- %s:%u:\n", __func__, __LINE__);
1209
1210 return 0;
1211 }
1212
1213 static int ps3_lpm_remove(struct ps3_system_bus_device *dev)
1214 {
1215 dev_dbg(&dev->core, " -> %s:%u:\n", __func__, __LINE__);
1216
1217 ps3_lpm_close();
1218
1219 kfree(lpm_priv);
1220 lpm_priv = NULL;
1221
1222 dev_info(&dev->core, " <- %s:%u:\n", __func__, __LINE__);
1223 return 0;
1224 }
1225
1226 static struct ps3_system_bus_driver ps3_lpm_driver = {
1227 .match_id = PS3_MATCH_ID_LPM,
1228 .core.name = "ps3-lpm",
1229 .core.owner = THIS_MODULE,
1230 .probe = ps3_lpm_probe,
1231 .remove = ps3_lpm_remove,
1232 .shutdown = ps3_lpm_remove,
1233 };
1234
1235 static int __init ps3_lpm_init(void)
1236 {
1237 pr_debug("%s:%d:\n", __func__, __LINE__);
1238 return ps3_system_bus_driver_register(&ps3_lpm_driver);
1239 }
1240
1241 static void __exit ps3_lpm_exit(void)
1242 {
1243 pr_debug("%s:%d:\n", __func__, __LINE__);
1244 ps3_system_bus_driver_unregister(&ps3_lpm_driver);
1245 }
1246
1247 module_init(ps3_lpm_init);
1248 module_exit(ps3_lpm_exit);
1249
1250 MODULE_LICENSE("GPL v2");
1251 MODULE_DESCRIPTION("PS3 Logical Performance Monitor Driver");
1252 MODULE_AUTHOR("Sony Corporation");
1253 MODULE_ALIAS(PS3_MODULE_ALIAS_LPM);
Linus' kernel tree