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