ps3-lpm.c 30.6 KB
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// SPDX-License-Identifier: GPL-2.0-only
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/*
 * PS3 Logical Performance Monitor.
 *
 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
 *  Copyright 2007 Sony Corp.
 */

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#include <linux/slab.h>
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#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/uaccess.h>
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#include <asm/smp.h>
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#include <asm/time.h>
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#include <asm/ps3.h>
#include <asm/lv1call.h>
#include <asm/cell-pmu.h>


/* BOOKMARK tag macros */
#define PS3_PM_BOOKMARK_START                    0x8000000000000000ULL
#define PS3_PM_BOOKMARK_STOP                     0x4000000000000000ULL
#define PS3_PM_BOOKMARK_TAG_KERNEL               0x1000000000000000ULL
#define PS3_PM_BOOKMARK_TAG_USER                 0x3000000000000000ULL
#define PS3_PM_BOOKMARK_TAG_MASK_HI              0xF000000000000000ULL
#define PS3_PM_BOOKMARK_TAG_MASK_LO              0x0F00000000000000ULL

/* CBE PM CONTROL register macros */
#define PS3_PM_CONTROL_PPU_TH0_BOOKMARK          0x00001000
#define PS3_PM_CONTROL_PPU_TH1_BOOKMARK          0x00000800
#define PS3_PM_CONTROL_PPU_COUNT_MODE_MASK       0x000C0000
#define PS3_PM_CONTROL_PPU_COUNT_MODE_PROBLEM    0x00080000
#define PS3_WRITE_PM_MASK                        0xFFFFFFFFFFFFFFFFULL

/* CBE PM START STOP register macros */
#define PS3_PM_START_STOP_PPU_TH0_BOOKMARK_START 0x02000000
#define PS3_PM_START_STOP_PPU_TH1_BOOKMARK_START 0x01000000
#define PS3_PM_START_STOP_PPU_TH0_BOOKMARK_STOP  0x00020000
#define PS3_PM_START_STOP_PPU_TH1_BOOKMARK_STOP  0x00010000
#define PS3_PM_START_STOP_START_MASK             0xFF000000
#define PS3_PM_START_STOP_STOP_MASK              0x00FF0000

/* CBE PM COUNTER register macres */
#define PS3_PM_COUNTER_MASK_HI                   0xFFFFFFFF00000000ULL
#define PS3_PM_COUNTER_MASK_LO                   0x00000000FFFFFFFFULL

/* BASE SIGNAL GROUP NUMBER macros */
#define PM_ISLAND2_BASE_SIGNAL_GROUP_NUMBER  0
#define PM_ISLAND2_SIGNAL_GROUP_NUMBER1      6
#define PM_ISLAND2_SIGNAL_GROUP_NUMBER2      7
#define PM_ISLAND3_BASE_SIGNAL_GROUP_NUMBER  7
#define PM_ISLAND4_BASE_SIGNAL_GROUP_NUMBER  15
#define PM_SPU_TRIGGER_SIGNAL_GROUP_NUMBER   17
#define PM_SPU_EVENT_SIGNAL_GROUP_NUMBER     18
#define PM_ISLAND5_BASE_SIGNAL_GROUP_NUMBER  18
#define PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER  24
#define PM_ISLAND7_BASE_SIGNAL_GROUP_NUMBER  49
#define PM_ISLAND8_BASE_SIGNAL_GROUP_NUMBER  52
#define PM_SIG_GROUP_SPU                     41
#define PM_SIG_GROUP_SPU_TRIGGER             42
#define PM_SIG_GROUP_SPU_EVENT               43
#define PM_SIG_GROUP_MFC_MAX                 60

/**
 * struct ps3_lpm_shadow_regs - Performance monitor shadow registers.
 *
 * @pm_control: Shadow of the processor's pm_control register.
 * @pm_start_stop: Shadow of the processor's pm_start_stop register.
 * @group_control: Shadow of the processor's group_control register.
 * @debug_bus_control: Shadow of the processor's debug_bus_control register.
 *
 * The logical performance monitor provides a write-only interface to
 * these processor registers.  These shadow variables cache the processor
 * register values for reading.
 *
 * The initial value of the shadow registers at lpm creation is
 * PS3_LPM_SHADOW_REG_INIT.
 */

struct ps3_lpm_shadow_regs {
	u64 pm_control;
	u64 pm_start_stop;
	u64 group_control;
	u64 debug_bus_control;
};

#define PS3_LPM_SHADOW_REG_INIT 0xFFFFFFFF00000000ULL

/**
 * struct ps3_lpm_priv - Private lpm device data.
 *
 * @open: An atomic variable indicating the lpm driver has been opened.
 * @rights: The lpm rigths granted by the system policy module.  A logical
 *  OR of enum ps3_lpm_rights.
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 * @node_id: The node id of a BE processor whose performance monitor this
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 *  lpar has the right to use.
 * @pu_id: The lv1 id of the logical PU.
 * @lpm_id: The lv1 id of this lpm instance.
 * @outlet_id: The outlet created by lv1 for this lpm instance.
 * @tb_count: The number of bytes of data held in the lv1 trace buffer.
 * @tb_cache: Kernel buffer to receive the data from the lv1 trace buffer.
 *  Must be 128 byte aligned.
 * @tb_cache_size: Size of the kernel @tb_cache buffer.  Must be 128 byte
 *  aligned.
 * @tb_cache_internal: An unaligned buffer allocated by this driver to be
 *  used for the trace buffer cache when ps3_lpm_open() is called with a
 *  NULL tb_cache argument.  Otherwise unused.
 * @shadow: Processor register shadow of type struct ps3_lpm_shadow_regs.
 * @sbd: The struct ps3_system_bus_device attached to this driver.
 *
 * The trace buffer is a buffer allocated and used internally to the lv1
 * hypervisor to collect trace data.  The trace buffer cache is a guest
 * buffer that accepts the trace data from the trace buffer.
 */

struct ps3_lpm_priv {
	atomic_t open;
	u64 rights;
	u64 node_id;
	u64 pu_id;
	u64 lpm_id;
	u64 outlet_id;
	u64 tb_count;
	void *tb_cache;
	u64 tb_cache_size;
	void *tb_cache_internal;
	struct ps3_lpm_shadow_regs shadow;
	struct ps3_system_bus_device *sbd;
};

enum {
	PS3_LPM_DEFAULT_TB_CACHE_SIZE = 0x4000,
};

/**
 * lpm_priv - Static instance of the lpm data.
 *
 * Since the exported routines don't support the notion of a device
 * instance we need to hold the instance in this static variable
 * and then only allow at most one instance at a time to be created.
 */

static struct ps3_lpm_priv *lpm_priv;

static struct device *sbd_core(void)
{
	BUG_ON(!lpm_priv || !lpm_priv->sbd);
	return &lpm_priv->sbd->core;
}

/**
 * use_start_stop_bookmark - Enable the PPU bookmark trace.
 *
 * And it enables PPU bookmark triggers ONLY if the other triggers are not set.
 * The start/stop bookmarks are inserted at ps3_enable_pm() and ps3_disable_pm()
 * to start/stop LPM.
 *
 * Used to get good quality of the performance counter.
 */

enum {use_start_stop_bookmark = 1,};

void ps3_set_bookmark(u64 bookmark)
{
	/*
	 * As per the PPE book IV, to avoid bookmark loss there must
	 * not be a traced branch within 10 cycles of setting the
	 * SPRN_BKMK register.  The actual text is unclear if 'within'
	 * includes cycles before the call.
	 */

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	asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;");
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	mtspr(SPRN_BKMK, bookmark);
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	asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;");
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}
EXPORT_SYMBOL_GPL(ps3_set_bookmark);

void ps3_set_pm_bookmark(u64 tag, u64 incident, u64 th_id)
{
	u64 bookmark;

	bookmark = (get_tb() & 0x00000000FFFFFFFFULL) |
		PS3_PM_BOOKMARK_TAG_KERNEL;
	bookmark = ((tag << 56) & PS3_PM_BOOKMARK_TAG_MASK_LO) |
		(incident << 48) | (th_id << 32) | bookmark;
	ps3_set_bookmark(bookmark);
}
EXPORT_SYMBOL_GPL(ps3_set_pm_bookmark);

/**
 * ps3_read_phys_ctr - Read physical counter registers.
 *
 * Each physical counter can act as one 32 bit counter or as two 16 bit
 * counters.
 */

u32 ps3_read_phys_ctr(u32 cpu, u32 phys_ctr)
{
	int result;
	u64 counter0415;
	u64 counter2637;

	if (phys_ctr >= NR_PHYS_CTRS) {
		dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
			__LINE__, phys_ctr);
		return 0;
	}

	result = lv1_set_lpm_counter(lpm_priv->lpm_id, 0, 0, 0, 0, &counter0415,
				     &counter2637);
	if (result) {
		dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter failed: "
			"phys_ctr %u, %s\n", __func__, __LINE__, phys_ctr,
			ps3_result(result));
		return 0;
	}

	switch (phys_ctr) {
	case 0:
		return counter0415 >> 32;
	case 1:
		return counter0415 & PS3_PM_COUNTER_MASK_LO;
	case 2:
		return counter2637 >> 32;
	case 3:
		return counter2637 & PS3_PM_COUNTER_MASK_LO;
	default:
		BUG();
	}
	return 0;
}
EXPORT_SYMBOL_GPL(ps3_read_phys_ctr);

/**
 * ps3_write_phys_ctr - Write physical counter registers.
 *
 * Each physical counter can act as one 32 bit counter or as two 16 bit
 * counters.
 */

void ps3_write_phys_ctr(u32 cpu, u32 phys_ctr, u32 val)
{
	u64 counter0415;
	u64 counter0415_mask;
	u64 counter2637;
	u64 counter2637_mask;
	int result;

	if (phys_ctr >= NR_PHYS_CTRS) {
		dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
			__LINE__, phys_ctr);
		return;
	}

	switch (phys_ctr) {
	case 0:
		counter0415 = (u64)val << 32;
		counter0415_mask = PS3_PM_COUNTER_MASK_HI;
		counter2637 = 0x0;
		counter2637_mask = 0x0;
		break;
	case 1:
		counter0415 = (u64)val;
		counter0415_mask = PS3_PM_COUNTER_MASK_LO;
		counter2637 = 0x0;
		counter2637_mask = 0x0;
		break;
	case 2:
		counter0415 = 0x0;
		counter0415_mask = 0x0;
		counter2637 = (u64)val << 32;
		counter2637_mask = PS3_PM_COUNTER_MASK_HI;
		break;
	case 3:
		counter0415 = 0x0;
		counter0415_mask = 0x0;
		counter2637 = (u64)val;
		counter2637_mask = PS3_PM_COUNTER_MASK_LO;
		break;
	default:
		BUG();
	}

	result = lv1_set_lpm_counter(lpm_priv->lpm_id,
				     counter0415, counter0415_mask,
				     counter2637, counter2637_mask,
				     &counter0415, &counter2637);
	if (result)
		dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter failed: "
			"phys_ctr %u, val %u, %s\n", __func__, __LINE__,
			phys_ctr, val, ps3_result(result));
}
EXPORT_SYMBOL_GPL(ps3_write_phys_ctr);

/**
 * ps3_read_ctr - Read counter.
 *
 * Read 16 or 32 bits depending on the current size of the counter.
 * Counters 4, 5, 6 & 7 are always 16 bit.
 */

u32 ps3_read_ctr(u32 cpu, u32 ctr)
{
	u32 val;
	u32 phys_ctr = ctr & (NR_PHYS_CTRS - 1);

	val = ps3_read_phys_ctr(cpu, phys_ctr);

	if (ps3_get_ctr_size(cpu, phys_ctr) == 16)
		val = (ctr < NR_PHYS_CTRS) ? (val >> 16) : (val & 0xffff);

	return val;
}
EXPORT_SYMBOL_GPL(ps3_read_ctr);

/**
 * ps3_write_ctr - Write counter.
 *
 * Write 16 or 32 bits depending on the current size of the counter.
 * Counters 4, 5, 6 & 7 are always 16 bit.
 */

void ps3_write_ctr(u32 cpu, u32 ctr, u32 val)
{
	u32 phys_ctr;
	u32 phys_val;

	phys_ctr = ctr & (NR_PHYS_CTRS - 1);

	if (ps3_get_ctr_size(cpu, phys_ctr) == 16) {
		phys_val = ps3_read_phys_ctr(cpu, phys_ctr);

		if (ctr < NR_PHYS_CTRS)
			val = (val << 16) | (phys_val & 0xffff);
		else
			val = (val & 0xffff) | (phys_val & 0xffff0000);
	}

	ps3_write_phys_ctr(cpu, phys_ctr, val);
}
EXPORT_SYMBOL_GPL(ps3_write_ctr);

/**
 * ps3_read_pm07_control - Read counter control registers.
 *
 * Each logical counter has a corresponding control register.
 */

u32 ps3_read_pm07_control(u32 cpu, u32 ctr)
{
	return 0;
}
EXPORT_SYMBOL_GPL(ps3_read_pm07_control);

/**
 * ps3_write_pm07_control - Write counter control registers.
 *
 * Each logical counter has a corresponding control register.
 */

void ps3_write_pm07_control(u32 cpu, u32 ctr, u32 val)
{
	int result;
	static const u64 mask = 0xFFFFFFFFFFFFFFFFULL;
	u64 old_value;

	if (ctr >= NR_CTRS) {
		dev_dbg(sbd_core(), "%s:%u: ctr too big: %u\n", __func__,
			__LINE__, ctr);
		return;
	}

	result = lv1_set_lpm_counter_control(lpm_priv->lpm_id, ctr, val, mask,
					     &old_value);
	if (result)
		dev_err(sbd_core(), "%s:%u: lv1_set_lpm_counter_control "
			"failed: ctr %u, %s\n", __func__, __LINE__, ctr,
			ps3_result(result));
}
EXPORT_SYMBOL_GPL(ps3_write_pm07_control);

/**
 * ps3_read_pm - Read Other LPM control registers.
 */

u32 ps3_read_pm(u32 cpu, enum pm_reg_name reg)
{
	int result = 0;
	u64 val = 0;

	switch (reg) {
	case pm_control:
		return lpm_priv->shadow.pm_control;
	case trace_address:
		return CBE_PM_TRACE_BUF_EMPTY;
	case pm_start_stop:
		return lpm_priv->shadow.pm_start_stop;
	case pm_interval:
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		result = lv1_set_lpm_interval(lpm_priv->lpm_id, 0, 0, &val);
		if (result) {
			val = 0;
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			dev_dbg(sbd_core(), "%s:%u: lv1 set_interval failed: "
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				"reg %u, %s\n", __func__, __LINE__, reg,
				ps3_result(result));
		}
		return (u32)val;
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	case group_control:
		return lpm_priv->shadow.group_control;
	case debug_bus_control:
		return lpm_priv->shadow.debug_bus_control;
	case pm_status:
		result = lv1_get_lpm_interrupt_status(lpm_priv->lpm_id,
						      &val);
		if (result) {
			val = 0;
			dev_dbg(sbd_core(), "%s:%u: lv1 get_lpm_status failed: "
				"reg %u, %s\n", __func__, __LINE__, reg,
				ps3_result(result));
		}
		return (u32)val;
	case ext_tr_timer:
		return 0;
	default:
		dev_dbg(sbd_core(), "%s:%u: unknown reg: %d\n", __func__,
			__LINE__, reg);
		BUG();
		break;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(ps3_read_pm);

/**
 * ps3_write_pm - Write Other LPM control registers.
 */

void ps3_write_pm(u32 cpu, enum pm_reg_name reg, u32 val)
{
	int result = 0;
	u64 dummy;

	switch (reg) {
	case group_control:
		if (val != lpm_priv->shadow.group_control)
			result = lv1_set_lpm_group_control(lpm_priv->lpm_id,
							   val,
							   PS3_WRITE_PM_MASK,
							   &dummy);
		lpm_priv->shadow.group_control = val;
		break;
	case debug_bus_control:
		if (val != lpm_priv->shadow.debug_bus_control)
			result = lv1_set_lpm_debug_bus_control(lpm_priv->lpm_id,
							      val,
							      PS3_WRITE_PM_MASK,
							      &dummy);
		lpm_priv->shadow.debug_bus_control = val;
		break;
	case pm_control:
		if (use_start_stop_bookmark)
			val |= (PS3_PM_CONTROL_PPU_TH0_BOOKMARK |
				PS3_PM_CONTROL_PPU_TH1_BOOKMARK);
		if (val != lpm_priv->shadow.pm_control)
			result = lv1_set_lpm_general_control(lpm_priv->lpm_id,
							     val,
							     PS3_WRITE_PM_MASK,
							     0, 0, &dummy,
							     &dummy);
		lpm_priv->shadow.pm_control = val;
		break;
	case pm_interval:
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		result = lv1_set_lpm_interval(lpm_priv->lpm_id, val,
					      PS3_WRITE_PM_MASK, &dummy);
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		break;
	case pm_start_stop:
		if (val != lpm_priv->shadow.pm_start_stop)
			result = lv1_set_lpm_trigger_control(lpm_priv->lpm_id,
							     val,
							     PS3_WRITE_PM_MASK,
							     &dummy);
		lpm_priv->shadow.pm_start_stop = val;
		break;
	case trace_address:
	case ext_tr_timer:
	case pm_status:
		break;
	default:
		dev_dbg(sbd_core(), "%s:%u: unknown reg: %d\n", __func__,
			__LINE__, reg);
		BUG();
		break;
	}

	if (result)
		dev_err(sbd_core(), "%s:%u: lv1 set_control failed: "
			"reg %u, %s\n", __func__, __LINE__, reg,
			ps3_result(result));
}
EXPORT_SYMBOL_GPL(ps3_write_pm);

/**
 * ps3_get_ctr_size - Get the size of a physical counter.
 *
 * Returns either 16 or 32.
 */

u32 ps3_get_ctr_size(u32 cpu, u32 phys_ctr)
{
	u32 pm_ctrl;

	if (phys_ctr >= NR_PHYS_CTRS) {
		dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
			__LINE__, phys_ctr);
		return 0;
	}

	pm_ctrl = ps3_read_pm(cpu, pm_control);
	return (pm_ctrl & CBE_PM_16BIT_CTR(phys_ctr)) ? 16 : 32;
}
EXPORT_SYMBOL_GPL(ps3_get_ctr_size);

/**
 * ps3_set_ctr_size - Set the size of a physical counter to 16 or 32 bits.
 */

void ps3_set_ctr_size(u32 cpu, u32 phys_ctr, u32 ctr_size)
{
	u32 pm_ctrl;

	if (phys_ctr >= NR_PHYS_CTRS) {
		dev_dbg(sbd_core(), "%s:%u: phys_ctr too big: %u\n", __func__,
			__LINE__, phys_ctr);
		return;
	}

	pm_ctrl = ps3_read_pm(cpu, pm_control);

	switch (ctr_size) {
	case 16:
		pm_ctrl |= CBE_PM_16BIT_CTR(phys_ctr);
		ps3_write_pm(cpu, pm_control, pm_ctrl);
		break;

	case 32:
		pm_ctrl &= ~CBE_PM_16BIT_CTR(phys_ctr);
		ps3_write_pm(cpu, pm_control, pm_ctrl);
		break;
	default:
		BUG();
	}
}
EXPORT_SYMBOL_GPL(ps3_set_ctr_size);

static u64 pm_translate_signal_group_number_on_island2(u64 subgroup)
{

	if (subgroup == 2)
		subgroup = 3;

	if (subgroup <= 6)
		return PM_ISLAND2_BASE_SIGNAL_GROUP_NUMBER + subgroup;
	else if (subgroup == 7)
		return PM_ISLAND2_SIGNAL_GROUP_NUMBER1;
	else
		return PM_ISLAND2_SIGNAL_GROUP_NUMBER2;
}

static u64 pm_translate_signal_group_number_on_island3(u64 subgroup)
{

	switch (subgroup) {
	case 2:
	case 3:
	case 4:
		subgroup += 2;
		break;
	case 5:
		subgroup = 8;
		break;
	default:
		break;
	}
	return PM_ISLAND3_BASE_SIGNAL_GROUP_NUMBER + subgroup;
}

static u64 pm_translate_signal_group_number_on_island4(u64 subgroup)
{
	return PM_ISLAND4_BASE_SIGNAL_GROUP_NUMBER + subgroup;
}

static u64 pm_translate_signal_group_number_on_island5(u64 subgroup)
{

	switch (subgroup) {
	case 3:
		subgroup = 4;
		break;
	case 4:
		subgroup = 6;
		break;
	default:
		break;
	}
	return PM_ISLAND5_BASE_SIGNAL_GROUP_NUMBER + subgroup;
}

static u64 pm_translate_signal_group_number_on_island6(u64 subgroup,
						       u64 subsubgroup)
{
	switch (subgroup) {
	case 3:
	case 4:
	case 5:
		subgroup += 1;
		break;
	default:
		break;
	}

	switch (subsubgroup) {
	case 4:
	case 5:
	case 6:
		subsubgroup += 2;
		break;
	case 7:
	case 8:
	case 9:
	case 10:
		subsubgroup += 4;
		break;
	case 11:
	case 12:
	case 13:
		subsubgroup += 5;
		break;
	default:
		break;
	}

	if (subgroup <= 5)
		return (PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER + subgroup);
	else
		return (PM_ISLAND6_BASE_SIGNAL_GROUP_NUMBER + subgroup
			+ subsubgroup - 1);
}

static u64 pm_translate_signal_group_number_on_island7(u64 subgroup)
{
	return PM_ISLAND7_BASE_SIGNAL_GROUP_NUMBER + subgroup;
}

static u64 pm_translate_signal_group_number_on_island8(u64 subgroup)
{
	return PM_ISLAND8_BASE_SIGNAL_GROUP_NUMBER + subgroup;
}

static u64 pm_signal_group_to_ps3_lv1_signal_group(u64 group)
{
	u64 island;
	u64 subgroup;
	u64 subsubgroup;

	subgroup = 0;
	subsubgroup = 0;
	island = 0;
	if (group < 1000) {
		if (group < 100) {
			if (20 <= group && group < 30) {
				island = 2;
				subgroup = group - 20;
			} else if (30 <= group && group < 40) {
				island = 3;
				subgroup = group - 30;
			} else if (40 <= group && group < 50) {
				island = 4;
				subgroup = group - 40;
			} else if (50 <= group && group < 60) {
				island = 5;
				subgroup = group - 50;
			} else if (60 <= group && group < 70) {
				island = 6;
				subgroup = group - 60;
			} else if (70 <= group && group < 80) {
				island = 7;
				subgroup = group - 70;
			} else if (80 <= group && group < 90) {
				island = 8;
				subgroup = group - 80;
			}
		} else if (200 <= group && group < 300) {
			island = 2;
			subgroup = group - 200;
		} else if (600 <= group && group < 700) {
			island = 6;
			subgroup = 5;
			subsubgroup = group - 650;
		}
	} else if (6000 <= group && group < 7000) {
		island = 6;
		subgroup = 5;
		subsubgroup = group - 6500;
	}

	switch (island) {
	case 2:
		return pm_translate_signal_group_number_on_island2(subgroup);
	case 3:
		return pm_translate_signal_group_number_on_island3(subgroup);
	case 4:
		return pm_translate_signal_group_number_on_island4(subgroup);
	case 5:
		return pm_translate_signal_group_number_on_island5(subgroup);
	case 6:
		return pm_translate_signal_group_number_on_island6(subgroup,
								   subsubgroup);
	case 7:
		return pm_translate_signal_group_number_on_island7(subgroup);
	case 8:
		return pm_translate_signal_group_number_on_island8(subgroup);
	default:
724
		dev_dbg(sbd_core(), "%s:%u: island not found: %llu\n", __func__,
725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756
			__LINE__, group);
		BUG();
		break;
	}
	return 0;
}

static u64 pm_bus_word_to_ps3_lv1_bus_word(u8 word)
{

	switch (word) {
	case 1:
		return 0xF000;
	case 2:
		return 0x0F00;
	case 4:
		return 0x00F0;
	case 8:
	default:
		return 0x000F;
	}
}

static int __ps3_set_signal(u64 lv1_signal_group, u64 bus_select,
			    u64 signal_select, u64 attr1, u64 attr2, u64 attr3)
{
	int ret;

	ret = lv1_set_lpm_signal(lpm_priv->lpm_id, lv1_signal_group, bus_select,
				 signal_select, attr1, attr2, attr3);
	if (ret)
		dev_err(sbd_core(),
757
			"%s:%u: error:%d 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx\n",
758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
			__func__, __LINE__, ret, lv1_signal_group, bus_select,
			signal_select, attr1, attr2, attr3);

	return ret;
}

int ps3_set_signal(u64 signal_group, u8 signal_bit, u16 sub_unit,
		   u8 bus_word)
{
	int ret;
	u64 lv1_signal_group;
	u64 bus_select;
	u64 signal_select;
	u64 attr1, attr2, attr3;

	if (signal_group == 0)
		return __ps3_set_signal(0, 0, 0, 0, 0, 0);

	lv1_signal_group =
		pm_signal_group_to_ps3_lv1_signal_group(signal_group);
	bus_select = pm_bus_word_to_ps3_lv1_bus_word(bus_word);

	switch (signal_group) {
	case PM_SIG_GROUP_SPU_TRIGGER:
		signal_select = 1;
		signal_select = signal_select << (63 - signal_bit);
		break;
	case PM_SIG_GROUP_SPU_EVENT:
		signal_select = 1;
		signal_select = (signal_select << (63 - signal_bit)) | 0x3;
		break;
	default:
		signal_select = 0;
		break;
	}

	/*
	 * 0: physical object.
	 * 1: logical object.
	 * This parameter is only used for the PPE and SPE signals.
	 */
	attr1 = 1;

	/*
	 * This parameter is used to specify the target physical/logical
	 * PPE/SPE object.
	 */
	if (PM_SIG_GROUP_SPU <= signal_group &&
		signal_group < PM_SIG_GROUP_MFC_MAX)
		attr2 = sub_unit;
	else
		attr2 = lpm_priv->pu_id;

	/*
	 * This parameter is only used for setting the SPE signal.
	 */
	attr3 = 0;

	ret = __ps3_set_signal(lv1_signal_group, bus_select, signal_select,
			       attr1, attr2, attr3);
	if (ret)
		dev_err(sbd_core(), "%s:%u: __ps3_set_signal failed: %d\n",
			__func__, __LINE__, ret);

	return ret;
}
EXPORT_SYMBOL_GPL(ps3_set_signal);

u32 ps3_get_hw_thread_id(int cpu)
{
	return get_hard_smp_processor_id(cpu);
}
EXPORT_SYMBOL_GPL(ps3_get_hw_thread_id);

/**
 * ps3_enable_pm - Enable the entire performance monitoring unit.
 *
 * When we enable the LPM, all pending writes to counters get committed.
 */

void ps3_enable_pm(u32 cpu)
{
	int result;
	u64 tmp;
	int insert_bookmark = 0;

	lpm_priv->tb_count = 0;

	if (use_start_stop_bookmark) {
		if (!(lpm_priv->shadow.pm_start_stop &
			(PS3_PM_START_STOP_START_MASK
			| PS3_PM_START_STOP_STOP_MASK))) {
			result = lv1_set_lpm_trigger_control(lpm_priv->lpm_id,
				(PS3_PM_START_STOP_PPU_TH0_BOOKMARK_START |
				PS3_PM_START_STOP_PPU_TH1_BOOKMARK_START |
				PS3_PM_START_STOP_PPU_TH0_BOOKMARK_STOP |
				PS3_PM_START_STOP_PPU_TH1_BOOKMARK_STOP),
				0xFFFFFFFFFFFFFFFFULL, &tmp);

			if (result)
				dev_err(sbd_core(), "%s:%u: "
					"lv1_set_lpm_trigger_control failed: "
					"%s\n", __func__, __LINE__,
					ps3_result(result));

			insert_bookmark = !result;
		}
	}

	result = lv1_start_lpm(lpm_priv->lpm_id);

	if (result)
		dev_err(sbd_core(), "%s:%u: lv1_start_lpm failed: %s\n",
			__func__, __LINE__, ps3_result(result));

	if (use_start_stop_bookmark && !result && insert_bookmark)
		ps3_set_bookmark(get_tb() | PS3_PM_BOOKMARK_START);
}
EXPORT_SYMBOL_GPL(ps3_enable_pm);

/**
 * ps3_disable_pm - Disable the entire performance monitoring unit.
 */

void ps3_disable_pm(u32 cpu)
{
	int result;
	u64 tmp;

	ps3_set_bookmark(get_tb() | PS3_PM_BOOKMARK_STOP);

	result = lv1_stop_lpm(lpm_priv->lpm_id, &tmp);

	if (result) {
892
		if (result != LV1_WRONG_STATE)
893 894 895 896 897 898 899
			dev_err(sbd_core(), "%s:%u: lv1_stop_lpm failed: %s\n",
				__func__, __LINE__, ps3_result(result));
		return;
	}

	lpm_priv->tb_count = tmp;

900
	dev_dbg(sbd_core(), "%s:%u: tb_count %llu (%llxh)\n", __func__, __LINE__,
901 902 903 904 905 906 907 908 909
		lpm_priv->tb_count, lpm_priv->tb_count);
}
EXPORT_SYMBOL_GPL(ps3_disable_pm);

/**
 * ps3_lpm_copy_tb - Copy data from the trace buffer to a kernel buffer.
 * @offset: Offset in bytes from the start of the trace buffer.
 * @buf: Copy destination.
 * @count: Maximum count of bytes to copy.
910
 * @bytes_copied: Pointer to a variable that will receive the number of
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
 *  bytes copied to @buf.
 *
 * On error @buf will contain any successfully copied trace buffer data
 * and bytes_copied will be set to the number of bytes successfully copied.
 */

int ps3_lpm_copy_tb(unsigned long offset, void *buf, unsigned long count,
		    unsigned long *bytes_copied)
{
	int result;

	*bytes_copied = 0;

	if (!lpm_priv->tb_cache)
		return -EPERM;

	if (offset >= lpm_priv->tb_count)
		return 0;

930
	count = min_t(u64, count, lpm_priv->tb_count - offset);
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964

	while (*bytes_copied < count) {
		const unsigned long request = count - *bytes_copied;
		u64 tmp;

		result = lv1_copy_lpm_trace_buffer(lpm_priv->lpm_id, offset,
						   request, &tmp);
		if (result) {
			dev_dbg(sbd_core(), "%s:%u: 0x%lx bytes at 0x%lx\n",
				__func__, __LINE__, request, offset);

			dev_err(sbd_core(), "%s:%u: lv1_copy_lpm_trace_buffer "
				"failed: %s\n", __func__, __LINE__,
				ps3_result(result));
			return result == LV1_WRONG_STATE ? -EBUSY : -EINVAL;
		}

		memcpy(buf, lpm_priv->tb_cache, tmp);
		buf += tmp;
		*bytes_copied += tmp;
		offset += tmp;
	}
	dev_dbg(sbd_core(), "%s:%u: copied %lxh bytes\n", __func__, __LINE__,
		*bytes_copied);

	return 0;
}
EXPORT_SYMBOL_GPL(ps3_lpm_copy_tb);

/**
 * ps3_lpm_copy_tb_to_user - Copy data from the trace buffer to a user buffer.
 * @offset: Offset in bytes from the start of the trace buffer.
 * @buf: A __user copy destination.
 * @count: Maximum count of bytes to copy.
965
 * @bytes_copied: Pointer to a variable that will receive the number of
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984
 *  bytes copied to @buf.
 *
 * On error @buf will contain any successfully copied trace buffer data
 * and bytes_copied will be set to the number of bytes successfully copied.
 */

int ps3_lpm_copy_tb_to_user(unsigned long offset, void __user *buf,
			    unsigned long count, unsigned long *bytes_copied)
{
	int result;

	*bytes_copied = 0;

	if (!lpm_priv->tb_cache)
		return -EPERM;

	if (offset >= lpm_priv->tb_count)
		return 0;

985
	count = min_t(u64, count, lpm_priv->tb_count - offset);
986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004

	while (*bytes_copied < count) {
		const unsigned long request = count - *bytes_copied;
		u64 tmp;

		result = lv1_copy_lpm_trace_buffer(lpm_priv->lpm_id, offset,
						   request, &tmp);
		if (result) {
			dev_dbg(sbd_core(), "%s:%u: 0x%lx bytes at 0x%lx\n",
				__func__, __LINE__, request, offset);
			dev_err(sbd_core(), "%s:%u: lv1_copy_lpm_trace_buffer "
				"failed: %s\n", __func__, __LINE__,
				ps3_result(result));
			return result == LV1_WRONG_STATE ? -EBUSY : -EINVAL;
		}

		result = copy_to_user(buf, lpm_priv->tb_cache, tmp);

		if (result) {
1005
			dev_dbg(sbd_core(), "%s:%u: 0x%llx bytes at 0x%p\n",
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
				__func__, __LINE__, tmp, buf);
			dev_err(sbd_core(), "%s:%u: copy_to_user failed: %d\n",
				__func__, __LINE__, result);
			return -EFAULT;
		}

		buf += tmp;
		*bytes_copied += tmp;
		offset += tmp;
	}
	dev_dbg(sbd_core(), "%s:%u: copied %lxh bytes\n", __func__, __LINE__,
		*bytes_copied);

	return 0;
}
EXPORT_SYMBOL_GPL(ps3_lpm_copy_tb_to_user);

/**
 * ps3_get_and_clear_pm_interrupts -
 *
 * Clearing interrupts for the entire performance monitoring unit.
 * Reading pm_status clears the interrupt bits.
 */

u32 ps3_get_and_clear_pm_interrupts(u32 cpu)
{
	return ps3_read_pm(cpu, pm_status);
}
EXPORT_SYMBOL_GPL(ps3_get_and_clear_pm_interrupts);

/**
 * ps3_enable_pm_interrupts -
 *
 * Enabling interrupts for the entire performance monitoring unit.
 * Enables the interrupt bits in the pm_status register.
 */

void ps3_enable_pm_interrupts(u32 cpu, u32 thread, u32 mask)
{
	if (mask)
		ps3_write_pm(cpu, pm_status, mask);
}
EXPORT_SYMBOL_GPL(ps3_enable_pm_interrupts);

/**
 * ps3_enable_pm_interrupts -
 *
 * Disabling interrupts for the entire performance monitoring unit.
 */

void ps3_disable_pm_interrupts(u32 cpu)
{
	ps3_get_and_clear_pm_interrupts(cpu);
	ps3_write_pm(cpu, pm_status, 0);
}
EXPORT_SYMBOL_GPL(ps3_disable_pm_interrupts);

/**
 * ps3_lpm_open - Open the logical performance monitor device.
1065
 * @tb_type: Specifies the type of trace buffer lv1 should use for this lpm
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
 *  instance, specified by one of enum ps3_lpm_tb_type.
 * @tb_cache: Optional user supplied buffer to use as the trace buffer cache.
 *  If NULL, the driver will allocate and manage an internal buffer.
 *  Unused when when @tb_type is PS3_LPM_TB_TYPE_NONE.
 * @tb_cache_size: The size in bytes of the user supplied @tb_cache buffer.
 *  Unused when @tb_cache is NULL or @tb_type is PS3_LPM_TB_TYPE_NONE.
 */

int ps3_lpm_open(enum ps3_lpm_tb_type tb_type, void *tb_cache,
	u64 tb_cache_size)
{
	int result;
	u64 tb_size;

	BUG_ON(!lpm_priv);
	BUG_ON(tb_type != PS3_LPM_TB_TYPE_NONE
		&& tb_type != PS3_LPM_TB_TYPE_INTERNAL);

	if (tb_type == PS3_LPM_TB_TYPE_NONE && tb_cache)
		dev_dbg(sbd_core(), "%s:%u: bad in vals\n", __func__, __LINE__);

	if (!atomic_add_unless(&lpm_priv->open, 1, 1)) {
		dev_dbg(sbd_core(), "%s:%u: busy\n", __func__, __LINE__);
		return -EBUSY;
	}

	/* Note tb_cache needs 128 byte alignment. */

	if (tb_type == PS3_LPM_TB_TYPE_NONE) {
		lpm_priv->tb_cache_size = 0;
		lpm_priv->tb_cache_internal = NULL;
		lpm_priv->tb_cache = NULL;
	} else if (tb_cache) {
		if (tb_cache != (void *)_ALIGN_UP((unsigned long)tb_cache, 128)
			|| tb_cache_size != _ALIGN_UP(tb_cache_size, 128)) {
			dev_err(sbd_core(), "%s:%u: unaligned tb_cache\n",
				__func__, __LINE__);
			result = -EINVAL;
			goto fail_align;
		}
		lpm_priv->tb_cache_size = tb_cache_size;
		lpm_priv->tb_cache_internal = NULL;
		lpm_priv->tb_cache = tb_cache;
	} else {
		lpm_priv->tb_cache_size = PS3_LPM_DEFAULT_TB_CACHE_SIZE;
		lpm_priv->tb_cache_internal = kzalloc(
			lpm_priv->tb_cache_size + 127, GFP_KERNEL);
		if (!lpm_priv->tb_cache_internal) {
			dev_err(sbd_core(), "%s:%u: alloc internal tb_cache "
				"failed\n", __func__, __LINE__);
			result = -ENOMEM;
			goto fail_malloc;
		}
		lpm_priv->tb_cache = (void *)_ALIGN_UP(
			(unsigned long)lpm_priv->tb_cache_internal, 128);
	}

	result = lv1_construct_lpm(lpm_priv->node_id, tb_type, 0, 0,
				ps3_mm_phys_to_lpar(__pa(lpm_priv->tb_cache)),
				lpm_priv->tb_cache_size, &lpm_priv->lpm_id,
				&lpm_priv->outlet_id, &tb_size);

	if (result) {
		dev_err(sbd_core(), "%s:%u: lv1_construct_lpm failed: %s\n",
			__func__, __LINE__, ps3_result(result));
		result = -EINVAL;
		goto fail_construct;
	}

	lpm_priv->shadow.pm_control = PS3_LPM_SHADOW_REG_INIT;
	lpm_priv->shadow.pm_start_stop = PS3_LPM_SHADOW_REG_INIT;
	lpm_priv->shadow.group_control = PS3_LPM_SHADOW_REG_INIT;
	lpm_priv->shadow.debug_bus_control = PS3_LPM_SHADOW_REG_INIT;

1140 1141
	dev_dbg(sbd_core(), "%s:%u: lpm_id 0x%llx, outlet_id 0x%llx, "
		"tb_size 0x%llx\n", __func__, __LINE__, lpm_priv->lpm_id,
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
		lpm_priv->outlet_id, tb_size);

	return 0;

fail_construct:
	kfree(lpm_priv->tb_cache_internal);
	lpm_priv->tb_cache_internal = NULL;
fail_malloc:
fail_align:
	atomic_dec(&lpm_priv->open);
	return result;
}
EXPORT_SYMBOL_GPL(ps3_lpm_open);

/**
 * ps3_lpm_close - Close the lpm device.
 *
 */

int ps3_lpm_close(void)
{
	dev_dbg(sbd_core(), "%s:%u\n", __func__, __LINE__);

	lv1_destruct_lpm(lpm_priv->lpm_id);
	lpm_priv->lpm_id = 0;

	kfree(lpm_priv->tb_cache_internal);
	lpm_priv->tb_cache_internal = NULL;

	atomic_dec(&lpm_priv->open);
	return 0;
}
EXPORT_SYMBOL_GPL(ps3_lpm_close);

1176
static int ps3_lpm_probe(struct ps3_system_bus_device *dev)
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241
{
	dev_dbg(&dev->core, " -> %s:%u\n", __func__, __LINE__);

	if (lpm_priv) {
		dev_info(&dev->core, "%s:%u: called twice\n",
			__func__, __LINE__);
		return -EBUSY;
	}

	lpm_priv = kzalloc(sizeof(*lpm_priv), GFP_KERNEL);

	if (!lpm_priv)
		return -ENOMEM;

	lpm_priv->sbd = dev;
	lpm_priv->node_id = dev->lpm.node_id;
	lpm_priv->pu_id = dev->lpm.pu_id;
	lpm_priv->rights = dev->lpm.rights;

	dev_info(&dev->core, " <- %s:%u:\n", __func__, __LINE__);

	return 0;
}

static int ps3_lpm_remove(struct ps3_system_bus_device *dev)
{
	dev_dbg(&dev->core, " -> %s:%u:\n", __func__, __LINE__);

	ps3_lpm_close();

	kfree(lpm_priv);
	lpm_priv = NULL;

	dev_info(&dev->core, " <- %s:%u:\n", __func__, __LINE__);
	return 0;
}

static struct ps3_system_bus_driver ps3_lpm_driver = {
	.match_id = PS3_MATCH_ID_LPM,
	.core.name	= "ps3-lpm",
	.core.owner	= THIS_MODULE,
	.probe		= ps3_lpm_probe,
	.remove		= ps3_lpm_remove,
	.shutdown	= ps3_lpm_remove,
};

static int __init ps3_lpm_init(void)
{
	pr_debug("%s:%d:\n", __func__, __LINE__);
	return ps3_system_bus_driver_register(&ps3_lpm_driver);
}

static void __exit ps3_lpm_exit(void)
{
	pr_debug("%s:%d:\n", __func__, __LINE__);
	ps3_system_bus_driver_unregister(&ps3_lpm_driver);
}

module_init(ps3_lpm_init);
module_exit(ps3_lpm_exit);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("PS3 Logical Performance Monitor Driver");
MODULE_AUTHOR("Sony Corporation");
MODULE_ALIAS(PS3_MODULE_ALIAS_LPM);