drivers/ps3/ps3-lpm.c

   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 processor 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_interval 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 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);