drivers/ps3/ps3-lpm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * PS3 Logical Performance Monitor.
   4  *
   5  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   6  *  Copyright 2007 Sony Corp.
   7  */
   8
   9 #include <linux/slab.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/uaccess.h>
  14 #include <asm/smp.h>
  15 #include <asm/time.h>
  16 #include <asm/ps3.h>
  17 #include <asm/lv1call.h>
  18 #include <asm/cell-pmu.h>
  19
  20
  21 /* BOOKMARK tag macros */
  22 #define PS3_PM_BOOKMARK_START                    0x8000000000000000ULL
  23 #define PS3_PM_BOOKMARK_STOP                     0x4000000000000000ULL
  24 #define PS3_PM_BOOKMARK_TAG_KERNEL               0x1000000000000000ULL
  25 #define PS3_PM_BOOKMARK_TAG_USER                 0x3000000000000000ULL
  26 #define PS3_PM_BOOKMARK_TAG_MASK_HI              0xF000000000000000ULL
  27 #define PS3_PM_BOOKMARK_TAG_MASK_LO              0x0F00000000000000ULL
  28
  29 /* CBE PM CONTROL register macros */
  30 #define PS3_PM_CONTROL_PPU_TH0_BOOKMARK          0x00001000
  31 #define PS3_PM_CONTROL_PPU_TH1_BOOKMARK          0x00000800
  32 #define PS3_PM_CONTROL_PPU_COUNT_MODE_MASK       0x000C0000
  33 #define PS3_PM_CONTROL_PPU_COUNT_MODE_PROBLEM    0x00080000
  34 #define PS3_WRITE_PM_MASK                        0xFFFFFFFFFFFFFFFFULL
  35
  36 /* CBE PM START STOP register macros */
  37 #define PS3_PM_START_STOP_PPU_TH0_BOOKMARK_START 0x02000000
  38 #define PS3_PM_START_STOP_PPU_TH1_BOOKMARK_START 0x01000000
  39 #define PS3_PM_START_STOP_PPU_TH0_BOOKMARK_STOP  0x00020000
  40 #define PS3_PM_START_STOP_PPU_TH1_BOOKMARK_STOP  0x00010000
  41 #define PS3_PM_START_STOP_START_MASK             0xFF000000
  42 #define PS3_PM_START_STOP_STOP_MASK              0x00FF0000
  43
  44 /* CBE PM COUNTER register macres */
  45 #define PS3_PM_COUNTER_MASK_HI                   0xFFFFFFFF00000000ULL
  46 #define PS3_PM_COUNTER_MASK_LO                   0x00000000FFFFFFFFULL
  47
  48 /* BASE SIGNAL GROUP NUMBER macros */
  49 #define PM_ISLAND2_BASE_SIGNAL_GROUP_NUMBER  0
  50 #define PM_ISLAND2_SIGNAL_GROUP_NUMBER1      6
  51 #define PM_ISLAND2_SIGNAL_GROUP_NUMBER2      7
  52 #define PM_ISLAND3_BASE_SIGNAL_GROUP_NUMBER  7
  53 #define PM_ISLAND4_BASE_SIGNAL_GROUP_NUMBER  15
  54 #define PM_SPU_TRIGGER_SIGNAL_GROUP_NUMBER   17
  55 #define PM_SPU_EVENT_SIGNAL_GROUP_NUMBER     18
  56 #define PM_ISLAND5_BASE_SIGNAL_GROUP_NUMBER  18
  57 #define PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER  24
  58 #define PM_ISLAND7_BASE_SIGNAL_GROUP_NUMBER  49
  59 #define PM_ISLAND8_BASE_SIGNAL_GROUP_NUMBER  52
  60 #define PM_SIG_GROUP_SPU                     41
  61 #define PM_SIG_GROUP_SPU_TRIGGER             42
  62 #define PM_SIG_GROUP_SPU_EVENT               43
  63 #define PM_SIG_GROUP_MFC_MAX                 60
  64
  65 /**
  66  * struct ps3_lpm_shadow_regs - Performance monitor shadow registers.
  67  *
  68  * @pm_control: Shadow of the processor's pm_control register.
  69  * @pm_start_stop: Shadow of the processor's pm_start_stop register.
  70  * @group_control: Shadow of the processor's group_control register.
  71  * @debug_bus_control: Shadow of the processor's debug_bus_control register.
  72  *
  73  * The logical performance monitor provides a write-only interface to
  74  * these processor registers.  These shadow variables cache the processor
  75  * register values for reading.
  76  *
  77  * The initial value of the shadow registers at lpm creation is
  78  * PS3_LPM_SHADOW_REG_INIT.
  79  */
  80
  81 struct ps3_lpm_shadow_regs {
  82         u64 pm_control;
  83         u64 pm_start_stop;
  84         u64 group_control;
  85         u64 debug_bus_control;
  86 };
  87
  88 #define PS3_LPM_SHADOW_REG_INIT 0xFFFFFFFF00000000ULL
  89
  90 /**
  91  * struct ps3_lpm_priv - Private lpm device data.
  92  *
  93  * @open: An atomic variable indicating the lpm driver has been opened.
  94  * @rights: The lpm rigths granted by the system policy module.  A logical
  95  *  OR of enum ps3_lpm_rights.
  96  * @node_id: The node id of a BE processor whose performance monitor this
  97  *  lpar has the right to use.
  98  * @pu_id: The lv1 id of the logical PU.
  99  * @lpm_id: The lv1 id of this lpm instance.
 100  * @outlet_id: The outlet created by lv1 for this lpm instance.
 101  * @tb_count: The number of bytes of data held in the lv1 trace buffer.
 102  * @tb_cache: Kernel buffer to receive the data from the lv1 trace buffer.
 103  *  Must be 128 byte aligned.
 104  * @tb_cache_size: Size of the kernel @tb_cache buffer.  Must be 128 byte
 105  *  aligned.
 106  * @tb_cache_internal: An unaligned buffer allocated by this driver to be
 107  *  used for the trace buffer cache when ps3_lpm_open() is called with a
 108  *  NULL tb_cache argument.  Otherwise unused.
 109  * @shadow: Processor register shadow of type struct ps3_lpm_shadow_regs.
 110  * @sbd: The struct ps3_system_bus_device attached to this driver.
 111  *
 112  * The trace buffer is a buffer allocated and used internally to the lv1
 113  * hypervisor to collect trace data.  The trace buffer cache is a guest
 114  * buffer that accepts the trace data from the trace buffer.
 115  */
 116
 117 struct ps3_lpm_priv {
 118         atomic_t open;
 119         u64 rights;
 120         u64 node_id;
 121         u64 pu_id;
 122         u64 lpm_id;
 123         u64 outlet_id;
 124         u64 tb_count;
 125         void *tb_cache;
 126         u64 tb_cache_size;
 127         void *tb_cache_internal;
 128         struct ps3_lpm_shadow_regs shadow;
 129         struct ps3_system_bus_device *sbd;
 130 };
 131
 132 enum {
 133         PS3_LPM_DEFAULT_TB_CACHE_SIZE = 0x4000,
 134 };
 135
 136 /**
 137  * lpm_priv - Static instance of the lpm data.
 138  *
 139  * Since the exported routines don't support the notion of a device
 140  * instance we need to hold the instance in this static variable
 141  * and then only allow at most one instance at a time to be created.
 142  */
 143
 144 static struct ps3_lpm_priv *lpm_priv;
 145
 146 static struct device *sbd_core(void)
 147 {
 148         BUG_ON(!lpm_priv || !lpm_priv->sbd);
 149         return &lpm_priv->sbd->core;
 150 }
 151
 152 /**
 153  * use_start_stop_bookmark - Enable the PPU bookmark trace.
 154  *
 155  * And it enables PPU bookmark triggers ONLY if the other triggers are not set.
 156  * The start/stop bookmarks are inserted at ps3_enable_pm() and ps3_disable_pm()
 157  * to start/stop LPM.
 158  *
 159  * Used to get good quality of the performance counter.
 160  */
 161
 162 enum {use_start_stop_bookmark = 1,};
 163
 164 void ps3_set_bookmark(u64 bookmark)
 165 {
 166         /*
 167          * As per the PPE book IV, to avoid bookmark loss there must
 168          * not be a traced branch within 10 cycles of setting the
 169          * SPRN_BKMK register.  The actual text is unclear if 'within'
 170          * includes cycles before the call.
 171          */
 172
 173         asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;");
 174         mtspr(SPRN_BKMK, bookmark);
 175         asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;");
 176 }
 177 EXPORT_SYMBOL_GPL(ps3_set_bookmark);
 178
 179 void ps3_set_pm_bookmark(u64 tag, u64 incident, u64 th_id)
 180 {
 181         u64 bookmark;
 182
 183         bookmark = (get_tb() & 0x00000000FFFFFFFFULL) |
 184                 PS3_PM_BOOKMARK_TAG_KERNEL;
 185         bookmark = ((tag << 56) & PS3_PM_BOOKMARK_TAG_MASK_LO) |
 186                 (incident << 48) | (th_id << 32) | bookmark;
 187         ps3_set_bookmark(bookmark);
 188 }
 189 EXPORT_SYMBOL_GPL(ps3_set_pm_bookmark);
 190
 191 /**
 192  * ps3_read_phys_ctr - Read physical counter registers.
 193  *
 194  * Each physical counter can act as one 32 bit counter or as two 16 bit
 195  * counters.
 196  */
 197
 198 u32 ps3_read_phys_ctr(u32 cpu, u32 phys_ctr)
 199 {
 200         int result;
 201         u64 counter0415;
 202         u64 counter2637;
 203
 204         if (phys_ctr >= NR_PHYS_CTRS) {
 205                 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
 206                         __LINE__, phys_ctr);
 207                 return 0;
 208         }
 209
 210         result = lv1_set_lpm_counter(lpm_priv->lpm_id, 0, 0, 0, 0, &counter0415,
 211                                      &counter2637);
 212         if (result) {
 213                 dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter failed: "
 214                         "phys_ctr %u, %s\n", __func__, __LINE__, phys_ctr,
 215                         ps3_result(result));
 216                 return 0;
 217         }
 218
 219         switch (phys_ctr) {
 220         case 0:
 221                 return counter0415 >> 32;
 222         case 1:
 223                 return counter0415 & PS3_PM_COUNTER_MASK_LO;
 224         case 2:
 225                 return counter2637 >> 32;
 226         case 3:
 227                 return counter2637 & PS3_PM_COUNTER_MASK_LO;
 228         default:
 229                 BUG();
 230         }
 231         return 0;
 232 }
 233 EXPORT_SYMBOL_GPL(ps3_read_phys_ctr);
 234
 235 /**
 236  * ps3_write_phys_ctr - Write physical counter registers.
 237  *
 238  * Each physical counter can act as one 32 bit counter or as two 16 bit
 239  * counters.
 240  */
 241
 242 void ps3_write_phys_ctr(u32 cpu, u32 phys_ctr, u32 val)
 243 {
 244         u64 counter0415;
 245         u64 counter0415_mask;
 246         u64 counter2637;
 247         u64 counter2637_mask;
 248         int result;
 249
 250         if (phys_ctr >= NR_PHYS_CTRS) {
 251                 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
 252                         __LINE__, phys_ctr);
 253                 return;
 254         }
 255
 256         switch (phys_ctr) {
 257         case 0:
 258                 counter0415 = (u64)val << 32;
 259                 counter0415_mask = PS3_PM_COUNTER_MASK_HI;
 260                 counter2637 = 0x0;
 261                 counter2637_mask = 0x0;
 262                 break;
 263         case 1:
 264                 counter0415 = (u64)val;
 265                 counter0415_mask = PS3_PM_COUNTER_MASK_LO;
 266                 counter2637 = 0x0;
 267                 counter2637_mask = 0x0;
 268                 break;
 269         case 2:
 270                 counter0415 = 0x0;
 271                 counter0415_mask = 0x0;
 272                 counter2637 = (u64)val << 32;
 273                 counter2637_mask = PS3_PM_COUNTER_MASK_HI;
 274                 break;
 275         case 3:
 276                 counter0415 = 0x0;
 277                 counter0415_mask = 0x0;
 278                 counter2637 = (u64)val;
 279                 counter2637_mask = PS3_PM_COUNTER_MASK_LO;
 280                 break;
 281         default:
 282                 BUG();
 283         }
 284
 285         result = lv1_set_lpm_counter(lpm_priv->lpm_id,
 286                                      counter0415, counter0415_mask,
 287                                      counter2637, counter2637_mask,
 288                                      &counter0415, &counter2637);
 289         if (result)
 290                 dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter failed: "
 291                         "phys_ctr %u, val %u, %s\n", __func__, __LINE__,
 292                         phys_ctr, val, ps3_result(result));
 293 }
 294 EXPORT_SYMBOL_GPL(ps3_write_phys_ctr);
 295
 296 /**
 297  * ps3_read_ctr - Read counter.
 298  *
 299  * Read 16 or 32 bits depending on the current size of the counter.
 300  * Counters 4, 5, 6 & 7 are always 16 bit.
 301  */
 302
 303 u32 ps3_read_ctr(u32 cpu, u32 ctr)
 304 {
 305         u32 val;
 306         u32 phys_ctr = ctr & (NR_PHYS_CTRS - 1);
 307
 308         val = ps3_read_phys_ctr(cpu, phys_ctr);
 309
 310         if (ps3_get_ctr_size(cpu, phys_ctr) == 16)
 311                 val = (ctr < NR_PHYS_CTRS) ? (val >> 16) : (val & 0xffff);
 312
 313         return val;
 314 }
 315 EXPORT_SYMBOL_GPL(ps3_read_ctr);
 316
 317 /**
 318  * ps3_write_ctr - Write counter.
 319  *
 320  * Write 16 or 32 bits depending on the current size of the counter.
 321  * Counters 4, 5, 6 & 7 are always 16 bit.
 322  */
 323
 324 void ps3_write_ctr(u32 cpu, u32 ctr, u32 val)
 325 {
 326         u32 phys_ctr;
 327         u32 phys_val;
 328
 329         phys_ctr = ctr & (NR_PHYS_CTRS - 1);
 330
 331         if (ps3_get_ctr_size(cpu, phys_ctr) == 16) {
 332                 phys_val = ps3_read_phys_ctr(cpu, phys_ctr);
 333
 334                 if (ctr < NR_PHYS_CTRS)
 335                         val = (val << 16) | (phys_val & 0xffff);
 336                 else
 337                         val = (val & 0xffff) | (phys_val & 0xffff0000);
 338         }
 339
 340         ps3_write_phys_ctr(cpu, phys_ctr, val);
 341 }
 342 EXPORT_SYMBOL_GPL(ps3_write_ctr);
 343
 344 /**
 345  * ps3_read_pm07_control - Read counter control registers.
 346  *
 347  * Each logical counter has a corresponding control register.
 348  */
 349
 350 u32 ps3_read_pm07_control(u32 cpu, u32 ctr)
 351 {
 352         return 0;
 353 }
 354 EXPORT_SYMBOL_GPL(ps3_read_pm07_control);
 355
 356 /**
 357  * ps3_write_pm07_control - Write counter control registers.
 358  *
 359  * Each logical counter has a corresponding control register.
 360  */
 361
 362 void ps3_write_pm07_control(u32 cpu, u32 ctr, u32 val)
 363 {
 364         int result;
 365         static const u64 mask = 0xFFFFFFFFFFFFFFFFULL;
 366         u64 old_value;
 367
 368         if (ctr >= NR_CTRS) {
 369                 dev_dbg(sbd_core(), "%s:%u: ctr too big: %u\n", __func__,
 370                         __LINE__, ctr);
 371                 return;
 372         }
 373
 374         result = lv1_set_lpm_counter_control(lpm_priv->lpm_id, ctr, val, mask,
 375                                              &old_value);
 376         if (result)
 377                 dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter_control "
 378                         "failed: ctr %u, %s\n", __func__, __LINE__, ctr,
 379                         ps3_result(result));
 380 }
 381 EXPORT_SYMBOL_GPL(ps3_write_pm07_control);
 382
 383 /**
 384  * ps3_read_pm - Read Other LPM control registers.
 385  */
 386
 387 u32 ps3_read_pm(u32 cpu, enum pm_reg_name reg)
 388 {
 389         int result = 0;
 390         u64 val = 0;
 391
 392         switch (reg) {
 393         case pm_control:
 394                 return lpm_priv->shadow.pm_control;
 395         case trace_address:
 396                 return CBE_PM_TRACE_BUF_EMPTY;
 397         case pm_start_stop:
 398                 return lpm_priv->shadow.pm_start_stop;
 399         case pm_interval:
 400                 result = lv1_set_lpm_interval(lpm_priv->lpm_id, 0, 0, &val);
 401                 if (result) {
 402                         val = 0;
 403                         dev_dbg(sbd_core(), "%s:%u: lv1 set_interval failed: "
 404                                 "reg %u, %s\n", __func__, __LINE__, reg,
 405                                 ps3_result(result));
 406                 }
 407                 return (u32)val;
 408         case group_control:
 409                 return lpm_priv->shadow.group_control;
 410         case debug_bus_control:
 411                 return lpm_priv->shadow.debug_bus_control;
 412         case pm_status:
 413                 result = lv1_get_lpm_interrupt_status(lpm_priv->lpm_id,
 414                                                       &val);
 415                 if (result) {
 416                         val = 0;
 417                         dev_dbg(sbd_core(), "%s:%u: lv1 get_lpm_status failed: "
 418                                 "reg %u, %s\n", __func__, __LINE__, reg,
 419                                 ps3_result(result));
 420                 }
 421                 return (u32)val;
 422         case ext_tr_timer:
 423                 return 0;
 424         default:
 425                 dev_dbg(sbd_core(), "%s:%u: unknown reg: %d\n", __func__,
 426                         __LINE__, reg);
 427                 BUG();
 428                 break;
 429         }
 430
 431         return 0;
 432 }
 433 EXPORT_SYMBOL_GPL(ps3_read_pm);
 434
 435 /**
 436  * ps3_write_pm - Write Other LPM control registers.
 437  */
 438
 439 void ps3_write_pm(u32 cpu, enum pm_reg_name reg, u32 val)
 440 {
 441         int result = 0;
 442         u64 dummy;
 443
 444         switch (reg) {
 445         case group_control:
 446                 if (val != lpm_priv->shadow.group_control)
 447                         result = lv1_set_lpm_group_control(lpm_priv->lpm_id,
 448                                                            val,
 449                                                            PS3_WRITE_PM_MASK,
 450                                                            &dummy);
 451                 lpm_priv->shadow.group_control = val;
 452                 break;
 453         case debug_bus_control:
 454                 if (val != lpm_priv->shadow.debug_bus_control)
 455                         result = lv1_set_lpm_debug_bus_control(lpm_priv->lpm_id,
 456                                                               val,
 457                                                               PS3_WRITE_PM_MASK,
 458                                                               &dummy);
 459                 lpm_priv->shadow.debug_bus_control = val;
 460                 break;
 461         case pm_control:
 462                 if (use_start_stop_bookmark)
 463                         val |= (PS3_PM_CONTROL_PPU_TH0_BOOKMARK |
 464                                 PS3_PM_CONTROL_PPU_TH1_BOOKMARK);
 465                 if (val != lpm_priv->shadow.pm_control)
 466                         result = lv1_set_lpm_general_control(lpm_priv->lpm_id,
 467                                                              val,
 468                                                              PS3_WRITE_PM_MASK,
 469                                                              0, 0, &dummy,
 470                                                              &dummy);
 471                 lpm_priv->shadow.pm_control = val;
 472                 break;
 473         case pm_interval:
 474                 result = lv1_set_lpm_interval(lpm_priv->lpm_id, val,
 475                                               PS3_WRITE_PM_MASK, &dummy);
 476                 break;
 477         case pm_start_stop:
 478                 if (val != lpm_priv->shadow.pm_start_stop)
 479                         result = lv1_set_lpm_trigger_control(lpm_priv->lpm_id,
 480                                                              val,
 481                                                              PS3_WRITE_PM_MASK,
 482                                                              &dummy);
 483                 lpm_priv->shadow.pm_start_stop = val;
 484                 break;
 485         case trace_address:
 486         case ext_tr_timer:
 487         case pm_status:
 488                 break;
 489         default:
 490                 dev_dbg(sbd_core(), "%s:%u: unknown reg: %d\n", __func__,
 491                         __LINE__, reg);
 492                 BUG();
 493                 break;
 494         }
 495
 496         if (result)
 497                 dev_err(sbd_core(), "%s:%u: lv1 set_control failed: "
 498                         "reg %u, %s\n", __func__, __LINE__, reg,
 499                         ps3_result(result));
 500 }
 501 EXPORT_SYMBOL_GPL(ps3_write_pm);
 502
 503 /**
 504  * ps3_get_ctr_size - Get the size of a physical counter.
 505  *
 506  * Returns either 16 or 32.
 507  */
 508
 509 u32 ps3_get_ctr_size(u32 cpu, u32 phys_ctr)
 510 {
 511         u32 pm_ctrl;
 512
 513         if (phys_ctr >= NR_PHYS_CTRS) {
 514                 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
 515                         __LINE__, phys_ctr);
 516                 return 0;
 517         }
 518
 519         pm_ctrl = ps3_read_pm(cpu, pm_control);
 520         return (pm_ctrl & CBE_PM_16BIT_CTR(phys_ctr)) ? 16 : 32;
 521 }
 522 EXPORT_SYMBOL_GPL(ps3_get_ctr_size);
 523
 524 /**
 525  * ps3_set_ctr_size - Set the size of a physical counter to 16 or 32 bits.
 526  */
 527
 528 void ps3_set_ctr_size(u32 cpu, u32 phys_ctr, u32 ctr_size)
 529 {
 530         u32 pm_ctrl;
 531
 532         if (phys_ctr >= NR_PHYS_CTRS) {
 533                 dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
 534                         __LINE__, phys_ctr);
 535                 return;
 536         }
 537
 538         pm_ctrl = ps3_read_pm(cpu, pm_control);
 539
 540         switch (ctr_size) {
 541         case 16:
 542                 pm_ctrl |= CBE_PM_16BIT_CTR(phys_ctr);
 543                 ps3_write_pm(cpu, pm_control, pm_ctrl);
 544                 break;
 545
 546         case 32:
 547                 pm_ctrl &= ~CBE_PM_16BIT_CTR(phys_ctr);
 548                 ps3_write_pm(cpu, pm_control, pm_ctrl);
 549                 break;
 550         default:
 551                 BUG();
 552         }
 553 }
 554 EXPORT_SYMBOL_GPL(ps3_set_ctr_size);
 555
 556 static u64 pm_translate_signal_group_number_on_island2(u64 subgroup)
 557 {
 558
 559         if (subgroup == 2)
 560                 subgroup = 3;
 561
 562         if (subgroup <= 6)
 563                 return PM_ISLAND2_BASE_SIGNAL_GROUP_NUMBER + subgroup;
 564         else if (subgroup == 7)
 565                 return PM_ISLAND2_SIGNAL_GROUP_NUMBER1;
 566         else
 567                 return PM_ISLAND2_SIGNAL_GROUP_NUMBER2;
 568 }
 569
 570 static u64 pm_translate_signal_group_number_on_island3(u64 subgroup)
 571 {
 572
 573         switch (subgroup) {
 574         case 2:
 575         case 3:
 576         case 4:
 577                 subgroup += 2;
 578                 break;
 579         case 5:
 580                 subgroup = 8;
 581                 break;
 582         default:
 583                 break;
 584         }
 585         return PM_ISLAND3_BASE_SIGNAL_GROUP_NUMBER + subgroup;
 586 }
 587
 588 static u64 pm_translate_signal_group_number_on_island4(u64 subgroup)
 589 {
 590         return PM_ISLAND4_BASE_SIGNAL_GROUP_NUMBER + subgroup;
 591 }
 592
 593 static u64 pm_translate_signal_group_number_on_island5(u64 subgroup)
 594 {
 595
 596         switch (subgroup) {
 597         case 3:
 598                 subgroup = 4;
 599                 break;
 600         case 4:
 601                 subgroup = 6;
 602                 break;
 603         default:
 604                 break;
 605         }
 606         return PM_ISLAND5_BASE_SIGNAL_GROUP_NUMBER + subgroup;
 607 }
 608
 609 static u64 pm_translate_signal_group_number_on_island6(u64 subgroup,
 610                                                        u64 subsubgroup)
 611 {
 612         switch (subgroup) {
 613         case 3:
 614         case 4:
 615         case 5:
 616                 subgroup += 1;
 617                 break;
 618         default:
 619                 break;
 620         }
 621
 622         switch (subsubgroup) {
 623         case 4:
 624         case 5:
 625         case 6:
 626                 subsubgroup += 2;
 627                 break;
 628         case 7:
 629         case 8:
 630         case 9:
 631         case 10:
 632                 subsubgroup += 4;
 633                 break;
 634         case 11:
 635         case 12:
 636         case 13:
 637                 subsubgroup += 5;
 638                 break;
 639         default:
 640                 break;
 641         }
 642
 643         if (subgroup <= 5)
 644                 return (PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER + subgroup);
 645         else
 646                 return (PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER + subgroup
 647                         + subsubgroup - 1);
 648 }
 649
 650 static u64 pm_translate_signal_group_number_on_island7(u64 subgroup)
 651 {
 652         return PM_ISLAND7_BASE_SIGNAL_GROUP_NUMBER + subgroup;
 653 }
 654
 655 static u64 pm_translate_signal_group_number_on_island8(u64 subgroup)
 656 {
 657         return PM_ISLAND8_BASE_SIGNAL_GROUP_NUMBER + subgroup;
 658 }
 659
 660 static u64 pm_signal_group_to_ps3_lv1_signal_group(u64 group)
 661 {
 662         u64 island;
 663         u64 subgroup;
 664         u64 subsubgroup;
 665
 666         subgroup = 0;
 667         subsubgroup = 0;
 668         island = 0;
 669         if (group < 1000) {
 670                 if (group < 100) {
 671                         if (20 <= group && group < 30) {
 672                                 island = 2;
 673                                 subgroup = group - 20;
 674                         } else if (30 <= group && group < 40) {
 675                                 island = 3;
 676                                 subgroup = group - 30;
 677                         } else if (40 <= group && group < 50) {
 678                                 island = 4;
 679                                 subgroup = group - 40;
 680                         } else if (50 <= group && group < 60) {
 681                                 island = 5;
 682                                 subgroup = group - 50;
 683                         } else if (60 <= group && group < 70) {
 684                                 island = 6;
 685                                 subgroup = group - 60;
 686                         } else if (70 <= group && group < 80) {
 687                                 island = 7;
 688                                 subgroup = group - 70;
 689                         } else if (80 <= group && group < 90) {
 690                                 island = 8;
 691                                 subgroup = group - 80;
 692                         }
 693                 } else if (200 <= group && group < 300) {
 694                         island = 2;
 695                         subgroup = group - 200;
 696                 } else if (600 <= group && group < 700) {
 697                         island = 6;
 698                         subgroup = 5;
 699                         subsubgroup = group - 650;
 700                 }
 701         } else if (6000 <= group && group < 7000) {
 702                 island = 6;
 703                 subgroup = 5;
 704                 subsubgroup = group - 6500;
 705         }
 706
 707         switch (island) {
 708         case 2:
 709                 return pm_translate_signal_group_number_on_island2(subgroup);
 710         case 3:
 711                 return pm_translate_signal_group_number_on_island3(subgroup);
 712         case 4:
 713                 return pm_translate_signal_group_number_on_island4(subgroup);
 714         case 5:
 715                 return pm_translate_signal_group_number_on_island5(subgroup);
 716         case 6:
 717                 return pm_translate_signal_group_number_on_island6(subgroup,
 718                                                                    subsubgroup);
 719         case 7:
 720                 return pm_translate_signal_group_number_on_island7(subgroup);
 721         case 8:
 722                 return pm_translate_signal_group_number_on_island8(subgroup);
 723         default:
 724                 dev_dbg(sbd_core(), "%s:%u: island not found: %llu\n", __func__,
 725                         __LINE__, group);
 726                 BUG();
 727                 break;
 728         }
 729         return 0;
 730 }
 731
 732 static u64 pm_bus_word_to_ps3_lv1_bus_word(u8 word)
 733 {
 734
 735         switch (word) {
 736         case 1:
 737                 return 0xF000;
 738         case 2:
 739                 return 0x0F00;
 740         case 4:
 741                 return 0x00F0;
 742         case 8:
 743         default:
 744                 return 0x000F;
 745         }
 746 }
 747
 748 static int __ps3_set_signal(u64 lv1_signal_group, u64 bus_select,
 749                             u64 signal_select, u64 attr1, u64 attr2, u64 attr3)
 750 {
 751         int ret;
 752
 753         ret = lv1_set_lpm_signal(lpm_priv->lpm_id, lv1_signal_group, bus_select,
 754                                  signal_select, attr1, attr2, attr3);
 755         if (ret)
 756                 dev_err(sbd_core(),
 757                         "%s:%u: error:%d 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx\n",
 758                         __func__, __LINE__, ret, lv1_signal_group, bus_select,
 759                         signal_select, attr1, attr2, attr3);
 760
 761         return ret;
 762 }
 763
 764 int ps3_set_signal(u64 signal_group, u8 signal_bit, u16 sub_unit,
 765                    u8 bus_word)
 766 {
 767         int ret;
 768         u64 lv1_signal_group;
 769         u64 bus_select;
 770         u64 signal_select;
 771         u64 attr1, attr2, attr3;
 772
 773         if (signal_group == 0)
 774                 return __ps3_set_signal(0, 0, 0, 0, 0, 0);
 775
 776         lv1_signal_group =
 777                 pm_signal_group_to_ps3_lv1_signal_group(signal_group);
 778         bus_select = pm_bus_word_to_ps3_lv1_bus_word(bus_word);
 779
 780         switch (signal_group) {
 781         case PM_SIG_GROUP_SPU_TRIGGER:
 782                 signal_select = 1;
 783                 signal_select = signal_select << (63 - signal_bit);
 784                 break;
 785         case PM_SIG_GROUP_SPU_EVENT:
 786                 signal_select = 1;
 787                 signal_select = (signal_select << (63 - signal_bit)) | 0x3;
 788                 break;
 789         default:
 790                 signal_select = 0;
 791                 break;
 792         }
 793
 794         /*
 795          * 0: physical object.
 796          * 1: logical object.
 797          * This parameter is only used for the PPE and SPE signals.
 798          */
 799         attr1 = 1;
 800
 801         /*
 802          * This parameter is used to specify the target physical/logical
 803          * PPE/SPE object.
 804          */
 805         if (PM_SIG_GROUP_SPU <= signal_group &&
 806                 signal_group < PM_SIG_GROUP_MFC_MAX)
 807                 attr2 = sub_unit;
 808         else
 809                 attr2 = lpm_priv->pu_id;
 810
 811         /*
 812          * This parameter is only used for setting the SPE signal.
 813          */
 814         attr3 = 0;
 815
 816         ret = __ps3_set_signal(lv1_signal_group, bus_select, signal_select,
 817                                attr1, attr2, attr3);
 818         if (ret)
 819                 dev_err(sbd_core(), "%s:%u: __ps3_set_signal failed: %d\n",
 820                         __func__, __LINE__, ret);
 821
 822         return ret;
 823 }
 824 EXPORT_SYMBOL_GPL(ps3_set_signal);
 825
 826 u32 ps3_get_hw_thread_id(int cpu)
 827 {
 828         return get_hard_smp_processor_id(cpu);
 829 }
 830 EXPORT_SYMBOL_GPL(ps3_get_hw_thread_id);
 831
 832 /**
 833  * ps3_enable_pm - Enable the entire performance monitoring unit.
 834  *
 835  * When we enable the LPM, all pending writes to counters get committed.
 836  */
 837
 838 void ps3_enable_pm(u32 cpu)
 839 {
 840         int result;
 841         u64 tmp;
 842         int insert_bookmark = 0;
 843
 844         lpm_priv->tb_count = 0;
 845
 846         if (use_start_stop_bookmark) {
 847                 if (!(lpm_priv->shadow.pm_start_stop &
 848                         (PS3_PM_START_STOP_START_MASK
 849                         | PS3_PM_START_STOP_STOP_MASK))) {
 850                         result = lv1_set_lpm_trigger_control(lpm_priv->lpm_id,
 851                                 (PS3_PM_START_STOP_PPU_TH0_BOOKMARK_START |
 852                                 PS3_PM_START_STOP_PPU_TH1_BOOKMARK_START |
 853                                 PS3_PM_START_STOP_PPU_TH0_BOOKMARK_STOP |
 854                                 PS3_PM_START_STOP_PPU_TH1_BOOKMARK_STOP),
 855                                 0xFFFFFFFFFFFFFFFFULL, &tmp);
 856
 857                         if (result)
 858                                 dev_err(sbd_core(), "%s:%u: "
 859                                         "lv1_set_lpm_trigger_control failed: "
 860                                         "%s\n", __func__, __LINE__,
 861                                         ps3_result(result));
 862
 863                         insert_bookmark = !result;
 864                 }
 865         }
 866
 867         result = lv1_start_lpm(lpm_priv->lpm_id);
 868
 869         if (result)
 870                 dev_err(sbd_core(), "%s:%u: lv1_start_lpm failed: %s\n",
 871                         __func__, __LINE__, ps3_result(result));
 872
 873         if (use_start_stop_bookmark && !result && insert_bookmark)
 874                 ps3_set_bookmark(get_tb() | PS3_PM_BOOKMARK_START);
 875 }
 876 EXPORT_SYMBOL_GPL(ps3_enable_pm);
 877
 878 /**
 879  * ps3_disable_pm - Disable the entire performance monitoring unit.
 880  */
 881
 882 void ps3_disable_pm(u32 cpu)
 883 {
 884         int result;
 885         u64 tmp;
 886
 887         ps3_set_bookmark(get_tb() | PS3_PM_BOOKMARK_STOP);
 888
 889         result = lv1_stop_lpm(lpm_priv->lpm_id, &tmp);
 890
 891         if (result) {
 892                 if (result != LV1_WRONG_STATE)
 893                         dev_err(sbd_core(), "%s:%u: lv1_stop_lpm failed: %s\n",
 894                                 __func__, __LINE__, ps3_result(result));
 895                 return;
 896         }
 897
 898         lpm_priv->tb_count = tmp;
 899
 900         dev_dbg(sbd_core(), "%s:%u: tb_count %llu (%llxh)\n", __func__, __LINE__,
 901                 lpm_priv->tb_count, lpm_priv->tb_count);
 902 }
 903 EXPORT_SYMBOL_GPL(ps3_disable_pm);
 904
 905 /**
 906  * ps3_lpm_copy_tb - Copy data from the trace buffer to a kernel buffer.
 907  * @offset: Offset in bytes from the start of the trace buffer.
 908  * @buf: Copy destination.
 909  * @count: Maximum count of bytes to copy.
 910  * @bytes_copied: Pointer to a variable that will receive the number of
 911  *  bytes copied to @buf.
 912  *
 913  * On error @buf will contain any successfully copied trace buffer data
 914  * and bytes_copied will be set to the number of bytes successfully copied.
 915  */
 916
 917 int ps3_lpm_copy_tb(unsigned long offset, void *buf, unsigned long count,
 918                     unsigned long *bytes_copied)
 919 {
 920         int result;
 921
 922         *bytes_copied = 0;
 923
 924         if (!lpm_priv->tb_cache)
 925                 return -EPERM;
 926
 927         if (offset >= lpm_priv->tb_count)
 928                 return 0;
 929
 930         count = min_t(u64, count, lpm_priv->tb_count - offset);
 931
 932         while (*bytes_copied < count) {
 933                 const unsigned long request = count - *bytes_copied;
 934                 u64 tmp;
 935
 936                 result = lv1_copy_lpm_trace_buffer(lpm_priv->lpm_id, offset,
 937                                                    request, &tmp);
 938                 if (result) {
 939                         dev_dbg(sbd_core(), "%s:%u: 0x%lx bytes at 0x%lx\n",
 940                                 __func__, __LINE__, request, offset);
 941
 942                         dev_err(sbd_core(), "%s:%u: lv1_copy_lpm_trace_buffer "
 943                                 "failed: %s\n", __func__, __LINE__,
 944                                 ps3_result(result));
 945                         return result == LV1_WRONG_STATE ? -EBUSY : -EINVAL;
 946                 }
 947
 948                 memcpy(buf, lpm_priv->tb_cache, tmp);
 949                 buf += tmp;
 950                 *bytes_copied += tmp;
 951                 offset += tmp;
 952         }
 953         dev_dbg(sbd_core(), "%s:%u: copied %lxh bytes\n", __func__, __LINE__,
 954                 *bytes_copied);
 955
 956         return 0;
 957 }
 958 EXPORT_SYMBOL_GPL(ps3_lpm_copy_tb);
 959
 960 /**
 961  * ps3_lpm_copy_tb_to_user - Copy data from the trace buffer to a user buffer.
 962  * @offset: Offset in bytes from the start of the trace buffer.
 963  * @buf: A __user copy destination.
 964  * @count: Maximum count of bytes to copy.
 965  * @bytes_copied: Pointer to a variable that will receive the number of
 966  *  bytes copied to @buf.
 967  *
 968  * On error @buf will contain any successfully copied trace buffer data
 969  * and bytes_copied will be set to the number of bytes successfully copied.
 970  */
 971
 972 int ps3_lpm_copy_tb_to_user(unsigned long offset, void __user *buf,
 973                             unsigned long count, unsigned long *bytes_copied)
 974 {
 975         int result;
 976
 977         *bytes_copied = 0;
 978
 979         if (!lpm_priv->tb_cache)
 980                 return -EPERM;
 981
 982         if (offset >= lpm_priv->tb_count)
 983                 return 0;
 984
 985         count = min_t(u64, count, lpm_priv->tb_count - offset);
 986
 987         while (*bytes_copied < count) {
 988                 const unsigned long request = count - *bytes_copied;
 989                 u64 tmp;
 990
 991                 result = lv1_copy_lpm_trace_buffer(lpm_priv->lpm_id, offset,
 992                                                    request, &tmp);
 993                 if (result) {
 994                         dev_dbg(sbd_core(), "%s:%u: 0x%lx bytes at 0x%lx\n",
 995                                 __func__, __LINE__, request, offset);
 996                         dev_err(sbd_core(), "%s:%u: lv1_copy_lpm_trace_buffer "
 997                                 "failed: %s\n", __func__, __LINE__,
 998                                 ps3_result(result));
 999                         return result == LV1_WRONG_STATE ? -EBUSY : -EINVAL;
1000                 }
1001
1002                 result = copy_to_user(buf, lpm_priv->tb_cache, tmp);
1003
1004                 if (result) {
1005                         dev_dbg(sbd_core(), "%s:%u: 0x%llx bytes at 0x%p\n",
1006                                 __func__, __LINE__, tmp, buf);
1007                         dev_err(sbd_core(), "%s:%u: copy_to_user failed: %d\n",
1008                                 __func__, __LINE__, result);
1009                         return -EFAULT;
1010                 }
1011
1012                 buf += tmp;
1013                 *bytes_copied += tmp;
1014                 offset += tmp;
1015         }
1016         dev_dbg(sbd_core(), "%s:%u: copied %lxh bytes\n", __func__, __LINE__,
1017                 *bytes_copied);
1018
1019         return 0;
1020 }
1021 EXPORT_SYMBOL_GPL(ps3_lpm_copy_tb_to_user);
1022
1023 /**
1024  * ps3_get_and_clear_pm_interrupts -
1025  *
1026  * Clearing interrupts for the entire performance monitoring unit.
1027  * Reading pm_status clears the interrupt bits.
1028  */
1029
1030 u32 ps3_get_and_clear_pm_interrupts(u32 cpu)
1031 {
1032         return ps3_read_pm(cpu, pm_status);
1033 }
1034 EXPORT_SYMBOL_GPL(ps3_get_and_clear_pm_interrupts);
1035
1036 /**
1037  * ps3_enable_pm_interrupts -
1038  *
1039  * Enabling interrupts for the entire performance monitoring unit.
1040  * Enables the interrupt bits in the pm_status register.
1041  */
1042
1043 void ps3_enable_pm_interrupts(u32 cpu, u32 thread, u32 mask)
1044 {
1045         if (mask)
1046                 ps3_write_pm(cpu, pm_status, mask);
1047 }
1048 EXPORT_SYMBOL_GPL(ps3_enable_pm_interrupts);
1049
1050 /**
1051  * ps3_enable_pm_interrupts -
1052  *
1053  * Disabling interrupts for the entire performance monitoring unit.
1054  */
1055
1056 void ps3_disable_pm_interrupts(u32 cpu)
1057 {
1058         ps3_get_and_clear_pm_interrupts(cpu);
1059         ps3_write_pm(cpu, pm_status, 0);
1060 }
1061 EXPORT_SYMBOL_GPL(ps3_disable_pm_interrupts);
1062
1063 /**
1064  * ps3_lpm_open - Open the logical performance monitor device.
1065  * @tb_type: Specifies the type of trace buffer lv1 should use for this lpm
1066  *  instance, specified by one of enum ps3_lpm_tb_type.
1067  * @tb_cache: Optional user supplied buffer to use as the trace buffer cache.
1068  *  If NULL, the driver will allocate and manage an internal buffer.
1069  *  Unused when when @tb_type is PS3_LPM_TB_TYPE_NONE.
1070  * @tb_cache_size: The size in bytes of the user supplied @tb_cache buffer.
1071  *  Unused when @tb_cache is NULL or @tb_type is PS3_LPM_TB_TYPE_NONE.
1072  */
1073
1074 int ps3_lpm_open(enum ps3_lpm_tb_type tb_type, void *tb_cache,
1075         u64 tb_cache_size)
1076 {
1077         int result;
1078         u64 tb_size;
1079
1080         BUG_ON(!lpm_priv);
1081         BUG_ON(tb_type != PS3_LPM_TB_TYPE_NONE
1082                 && tb_type != PS3_LPM_TB_TYPE_INTERNAL);
1083
1084         if (tb_type == PS3_LPM_TB_TYPE_NONE && tb_cache)
1085                 dev_dbg(sbd_core(), "%s:%u: bad in vals\n", __func__, __LINE__);
1086
1087         if (!atomic_add_unless(&lpm_priv->open, 1, 1)) {
1088                 dev_dbg(sbd_core(), "%s:%u: busy\n", __func__, __LINE__);
1089                 return -EBUSY;
1090         }
1091
1092         /* Note tb_cache needs 128 byte alignment. */
1093
1094         if (tb_type == PS3_LPM_TB_TYPE_NONE) {
1095                 lpm_priv->tb_cache_size = 0;
1096                 lpm_priv->tb_cache_internal = NULL;
1097                 lpm_priv->tb_cache = NULL;
1098         } else if (tb_cache) {
1099                 if (tb_cache != (void *)ALIGN((unsigned long)tb_cache, 128)
1100                         || tb_cache_size != ALIGN(tb_cache_size, 128)) {
1101                         dev_err(sbd_core(), "%s:%u: unaligned tb_cache\n",
1102                                 __func__, __LINE__);
1103                         result = -EINVAL;
1104                         goto fail_align;
1105                 }
1106                 lpm_priv->tb_cache_size = tb_cache_size;
1107                 lpm_priv->tb_cache_internal = NULL;
1108                 lpm_priv->tb_cache = tb_cache;
1109         } else {
1110                 lpm_priv->tb_cache_size = PS3_LPM_DEFAULT_TB_CACHE_SIZE;
1111                 lpm_priv->tb_cache_internal = kzalloc(
1112                         lpm_priv->tb_cache_size + 127, GFP_KERNEL);
1113                 if (!lpm_priv->tb_cache_internal) {
1114                         result = -ENOMEM;
1115                         goto fail_malloc;
1116                 }
1117                 lpm_priv->tb_cache = (void *)ALIGN(
1118                         (unsigned long)lpm_priv->tb_cache_internal, 128);
1119         }
1120
1121         result = lv1_construct_lpm(lpm_priv->node_id, tb_type, 0, 0,
1122                                 ps3_mm_phys_to_lpar(__pa(lpm_priv->tb_cache)),
1123                                 lpm_priv->tb_cache_size, &lpm_priv->lpm_id,
1124                                 &lpm_priv->outlet_id, &tb_size);
1125
1126         if (result) {
1127                 dev_err(sbd_core(), "%s:%u: lv1_construct_lpm failed: %s\n",
1128                         __func__, __LINE__, ps3_result(result));
1129                 result = -EINVAL;
1130                 goto fail_construct;
1131         }
1132
1133         lpm_priv->shadow.pm_control = PS3_LPM_SHADOW_REG_INIT;
1134         lpm_priv->shadow.pm_start_stop = PS3_LPM_SHADOW_REG_INIT;
1135         lpm_priv->shadow.group_control = PS3_LPM_SHADOW_REG_INIT;
1136         lpm_priv->shadow.debug_bus_control = PS3_LPM_SHADOW_REG_INIT;
1137
1138         dev_dbg(sbd_core(), "%s:%u: lpm_id 0x%llx, outlet_id 0x%llx, "
1139                 "tb_size 0x%llx\n", __func__, __LINE__, lpm_priv->lpm_id,
1140                 lpm_priv->outlet_id, tb_size);
1141
1142         return 0;
1143
1144 fail_construct:
1145         kfree(lpm_priv->tb_cache_internal);
1146         lpm_priv->tb_cache_internal = NULL;
1147 fail_malloc:
1148 fail_align:
1149         atomic_dec(&lpm_priv->open);
1150         return result;
1151 }
1152 EXPORT_SYMBOL_GPL(ps3_lpm_open);
1153
1154 /**
1155  * ps3_lpm_close - Close the lpm device.
1156  *
1157  */
1158
1159 int ps3_lpm_close(void)
1160 {
1161         dev_dbg(sbd_core(), "%s:%u\n", __func__, __LINE__);
1162
1163         lv1_destruct_lpm(lpm_priv->lpm_id);
1164         lpm_priv->lpm_id = 0;
1165
1166         kfree(lpm_priv->tb_cache_internal);
1167         lpm_priv->tb_cache_internal = NULL;
1168
1169         atomic_dec(&lpm_priv->open);
1170         return 0;
1171 }
1172 EXPORT_SYMBOL_GPL(ps3_lpm_close);
1173
1174 static int ps3_lpm_probe(struct ps3_system_bus_device *dev)
1175 {
1176         dev_dbg(&dev->core, " -> %s:%u\n", __func__, __LINE__);
1177
1178         if (lpm_priv) {
1179                 dev_info(&dev->core, "%s:%u: called twice\n",
1180                         __func__, __LINE__);
1181                 return -EBUSY;
1182         }
1183
1184         lpm_priv = kzalloc(sizeof(*lpm_priv), GFP_KERNEL);
1185
1186         if (!lpm_priv)
1187                 return -ENOMEM;
1188
1189         lpm_priv->sbd = dev;
1190         lpm_priv->node_id = dev->lpm.node_id;
1191         lpm_priv->pu_id = dev->lpm.pu_id;
1192         lpm_priv->rights = dev->lpm.rights;
1193
1194         dev_info(&dev->core, " <- %s:%u:\n", __func__, __LINE__);
1195
1196         return 0;
1197 }
1198
1199 static void ps3_lpm_remove(struct ps3_system_bus_device *dev)
1200 {
1201         dev_dbg(&dev->core, " -> %s:%u:\n", __func__, __LINE__);
1202
1203         ps3_lpm_close();
1204
1205         kfree(lpm_priv);
1206         lpm_priv = NULL;
1207
1208         dev_info(&dev->core, " <- %s:%u:\n", __func__, __LINE__);
1209 }
1210
1211 static struct ps3_system_bus_driver ps3_lpm_driver = {
1212         .match_id = PS3_MATCH_ID_LPM,
1213         .core.name      = "ps3-lpm",
1214         .core.owner     = THIS_MODULE,
1215         .probe          = ps3_lpm_probe,
1216         .remove         = ps3_lpm_remove,
1217         .shutdown       = ps3_lpm_remove,
1218 };
1219
1220 static int __init ps3_lpm_init(void)
1221 {
1222         pr_debug("%s:%d:\n", __func__, __LINE__);
1223         return ps3_system_bus_driver_register(&ps3_lpm_driver);
1224 }
1225
1226 static void __exit ps3_lpm_exit(void)
1227 {
1228         pr_debug("%s:%d:\n", __func__, __LINE__);
1229         ps3_system_bus_driver_unregister(&ps3_lpm_driver);
1230 }
1231
1232 module_init(ps3_lpm_init);
1233 module_exit(ps3_lpm_exit);
1234
1235 MODULE_LICENSE("GPL v2");
1236 MODULE_DESCRIPTION("PS3 Logical Performance Monitor Driver");
1237 MODULE_AUTHOR("Sony Corporation");
1238 MODULE_ALIAS(PS3_MODULE_ALIAS_LPM);