// SPDX-License-Identifier: GPL-2.0-only /* * PS3 Logical Performance Monitor. * * Copyright (C) 2007 Sony Computer Entertainment Inc. * Copyright 2007 Sony Corp. */ #include #include #include #include #include #include #include #include #include #include /* 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. * @node_id: The node id of a BE processor whose performance monitor this * 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. */ asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;"); mtspr(SPRN_BKMK, bookmark); asm volatile("nop;nop;nop;nop;nop;nop;nop;nop;nop;"); } 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: result = lv1_set_lpm_interval(lpm_priv->lpm_id, 0, 0, &val); if (result) { val = 0; dev_dbg(sbd_core(), "%s:%u: lv1 set_interval failed: " "reg %u, %s\n", __func__, __LINE__, reg, ps3_result(result)); } return (u32)val; 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: result = lv1_set_lpm_interval(lpm_priv->lpm_id, val, PS3_WRITE_PM_MASK, &dummy); 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: dev_dbg(sbd_core(), "%s:%u: island not found: %llu\n", __func__, __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(), "%s:%u: error:%d 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx\n", __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) { if (result != LV1_WRONG_STATE) dev_err(sbd_core(), "%s:%u: lv1_stop_lpm failed: %s\n", __func__, __LINE__, ps3_result(result)); return; } lpm_priv->tb_count = tmp; dev_dbg(sbd_core(), "%s:%u: tb_count %llu (%llxh)\n", __func__, __LINE__, 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. * @bytes_copied: Pointer to a variable that will receive the number of * 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; count = min_t(u64, count, lpm_priv->tb_count - offset); 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. * @bytes_copied: Pointer to a variable that will receive the number of * 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; count = min_t(u64, count, lpm_priv->tb_count - offset); 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) { dev_dbg(sbd_core(), "%s:%u: 0x%llx bytes at 0x%p\n", __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. * @tb_type: Specifies the type of trace buffer lv1 should use for this lpm * 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 @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((unsigned long)tb_cache, 128) || tb_cache_size != ALIGN(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) { result = -ENOMEM; goto fail_malloc; } lpm_priv->tb_cache = (void *)ALIGN( (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; 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, 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); static int ps3_lpm_probe(struct ps3_system_bus_device *dev) { 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 void 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__); } 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);