powerpc/oprofile: IBM CELL: cleanup and restructuring
This patch restructures and cleans up the code a bit to make it easier to add new functionality later. The patch makes no functional changes to the existing code. Signed-off-by: Carl Love <carll@us.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Carl Love
Robert Richter
parent
4a6908a3a0
commit
9b93418e7e
2 changed files with 191 additions and 153 deletions
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@ -31,8 +31,8 @@ static unsigned int profiling_interval;
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#define SPU_PC_MASK 0xFFFF
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static DEFINE_SPINLOCK(sample_array_lock);
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unsigned long sample_array_lock_flags;
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static DEFINE_SPINLOCK(oprof_spu_smpl_arry_lck);
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unsigned long oprof_spu_smpl_arry_lck_flags;
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void set_spu_profiling_frequency(unsigned int freq_khz, unsigned int cycles_reset)
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{
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@ -145,13 +145,13 @@ static enum hrtimer_restart profile_spus(struct hrtimer *timer)
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* sample array must be loaded and then processed for a given
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* cpu. The sample array is not per cpu.
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*/
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spin_lock_irqsave(&sample_array_lock,
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sample_array_lock_flags);
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spin_lock_irqsave(&oprof_spu_smpl_arry_lck,
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oprof_spu_smpl_arry_lck_flags);
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num_samples = cell_spu_pc_collection(cpu);
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if (num_samples == 0) {
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spin_unlock_irqrestore(&sample_array_lock,
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sample_array_lock_flags);
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spin_unlock_irqrestore(&oprof_spu_smpl_arry_lck,
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oprof_spu_smpl_arry_lck_flags);
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continue;
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}
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@ -162,8 +162,8 @@ static enum hrtimer_restart profile_spus(struct hrtimer *timer)
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num_samples);
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}
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spin_unlock_irqrestore(&sample_array_lock,
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sample_array_lock_flags);
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spin_unlock_irqrestore(&oprof_spu_smpl_arry_lck,
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oprof_spu_smpl_arry_lck_flags);
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}
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smp_wmb(); /* insure spu event buffer updates are written */
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@ -182,13 +182,13 @@ static enum hrtimer_restart profile_spus(struct hrtimer *timer)
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static struct hrtimer timer;
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/*
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* Entry point for SPU profiling.
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* Entry point for SPU cycle profiling.
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* NOTE: SPU profiling is done system-wide, not per-CPU.
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*
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* cycles_reset is the count value specified by the user when
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* setting up OProfile to count SPU_CYCLES.
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*/
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int start_spu_profiling(unsigned int cycles_reset)
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int start_spu_profiling_cycles(unsigned int cycles_reset)
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{
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ktime_t kt;
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@ -212,10 +212,10 @@ int start_spu_profiling(unsigned int cycles_reset)
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return 0;
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}
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void stop_spu_profiling(void)
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void stop_spu_profiling_cycles(void)
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{
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spu_prof_running = 0;
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hrtimer_cancel(&timer);
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kfree(samples);
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pr_debug("SPU_PROF: stop_spu_profiling issued\n");
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pr_debug("SPU_PROF: stop_spu_profiling_cycles issued\n");
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}
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@ -40,14 +40,9 @@
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#include "../platforms/cell/interrupt.h"
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#include "cell/pr_util.h"
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static void cell_global_stop_spu(void);
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/*
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* spu_cycle_reset is the number of cycles between samples.
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* This variable is used for SPU profiling and should ONLY be set
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* at the beginning of cell_reg_setup; otherwise, it's read-only.
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*/
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static unsigned int spu_cycle_reset;
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#define PPU_PROFILING 0
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#define SPU_PROFILING_CYCLES 1
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#define SPU_PROFILING_EVENTS 2
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#define NUM_SPUS_PER_NODE 8
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#define SPU_CYCLES_EVENT_NUM 2 /* event number for SPU_CYCLES */
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@ -66,6 +61,14 @@ static unsigned int spu_cycle_reset;
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#define MAX_SPU_COUNT 0xFFFFFF /* maximum 24 bit LFSR value */
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/*
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* spu_cycle_reset is the number of cycles between samples.
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* This variable is used for SPU profiling and should ONLY be set
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* at the beginning of cell_reg_setup; otherwise, it's read-only.
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*/
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static unsigned int spu_cycle_reset;
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static unsigned int profiling_mode;
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struct pmc_cntrl_data {
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unsigned long vcntr;
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unsigned long evnts;
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@ -122,7 +125,6 @@ static struct {
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#define GET_INPUT_CONTROL(x) ((x & 0x00000004) >> 2)
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static DEFINE_PER_CPU(unsigned long[NR_PHYS_CTRS], pmc_values);
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static struct pmc_cntrl_data pmc_cntrl[NUM_THREADS][NR_PHYS_CTRS];
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/*
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@ -165,7 +167,7 @@ static int spu_rtas_token; /* token for SPU cycle profiling */
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static u32 reset_value[NR_PHYS_CTRS];
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static int num_counters;
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static int oprofile_running;
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static DEFINE_SPINLOCK(virt_cntr_lock);
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static DEFINE_SPINLOCK(cntr_lock);
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static u32 ctr_enabled;
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@ -367,7 +369,7 @@ static void write_pm_cntrl(int cpu)
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if (pm_regs.pm_cntrl.stop_at_max == 1)
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val |= CBE_PM_STOP_AT_MAX;
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if (pm_regs.pm_cntrl.trace_mode == 1)
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if (pm_regs.pm_cntrl.trace_mode != 0)
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val |= CBE_PM_TRACE_MODE_SET(pm_regs.pm_cntrl.trace_mode);
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if (pm_regs.pm_cntrl.freeze == 1)
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@ -441,7 +443,7 @@ static void cell_virtual_cntr(unsigned long data)
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* not both playing with the counters on the same node.
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*/
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spin_lock_irqsave(&virt_cntr_lock, flags);
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spin_lock_irqsave(&cntr_lock, flags);
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prev_hdw_thread = hdw_thread;
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@ -527,7 +529,7 @@ static void cell_virtual_cntr(unsigned long data)
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cbe_enable_pm(cpu);
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}
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spin_unlock_irqrestore(&virt_cntr_lock, flags);
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spin_unlock_irqrestore(&cntr_lock, flags);
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mod_timer(&timer_virt_cntr, jiffies + HZ / 10);
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}
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@ -541,44 +543,30 @@ static void start_virt_cntrs(void)
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add_timer(&timer_virt_cntr);
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}
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/* This function is called once for all cpus combined */
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static int cell_reg_setup(struct op_counter_config *ctr,
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static int cell_reg_setup_spu_cycles(struct op_counter_config *ctr,
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struct op_system_config *sys, int num_ctrs)
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{
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int i, j, cpu;
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spu_cycle_reset = 0;
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if (ctr[0].event == SPU_CYCLES_EVENT_NUM) {
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spu_cycle_reset = ctr[0].count;
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/*
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* Each node will need to make the rtas call to start
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* and stop SPU profiling. Get the token once and store it.
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*/
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spu_rtas_token = rtas_token("ibm,cbe-spu-perftools");
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if (unlikely(spu_rtas_token == RTAS_UNKNOWN_SERVICE)) {
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printk(KERN_ERR
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"%s: rtas token ibm,cbe-spu-perftools unknown\n",
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__func__);
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return -EIO;
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}
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}
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pm_rtas_token = rtas_token("ibm,cbe-perftools");
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spu_cycle_reset = ctr[0].count;
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/*
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* For all events excetp PPU CYCLEs, each node will need to make
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* the rtas cbe-perftools call to setup and reset the debug bus.
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* Make the token lookup call once and store it in the global
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* variable pm_rtas_token.
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* Each node will need to make the rtas call to start
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* and stop SPU profiling. Get the token once and store it.
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*/
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if (unlikely(pm_rtas_token == RTAS_UNKNOWN_SERVICE)) {
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spu_rtas_token = rtas_token("ibm,cbe-spu-perftools");
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if (unlikely(spu_rtas_token == RTAS_UNKNOWN_SERVICE)) {
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printk(KERN_ERR
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"%s: rtas token ibm,cbe-perftools unknown\n",
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"%s: rtas token ibm,cbe-spu-perftools unknown\n",
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__func__);
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return -EIO;
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}
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return 0;
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}
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static int cell_reg_setup_ppu(struct op_counter_config *ctr,
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struct op_system_config *sys, int num_ctrs)
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{
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int i, j, cpu;
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num_counters = num_ctrs;
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@ -665,6 +653,41 @@ static int cell_reg_setup(struct op_counter_config *ctr,
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}
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/* This function is called once for all cpus combined */
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static int cell_reg_setup(struct op_counter_config *ctr,
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struct op_system_config *sys, int num_ctrs)
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{
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int ret;
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spu_cycle_reset = 0;
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/*
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* For all events except PPU CYCLEs, each node will need to make
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* the rtas cbe-perftools call to setup and reset the debug bus.
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* Make the token lookup call once and store it in the global
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* variable pm_rtas_token.
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*/
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pm_rtas_token = rtas_token("ibm,cbe-perftools");
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if (unlikely(pm_rtas_token == RTAS_UNKNOWN_SERVICE)) {
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printk(KERN_ERR
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"%s: rtas token ibm,cbe-perftools unknown\n",
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__func__);
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return -EIO;
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}
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if (ctr[0].event == SPU_CYCLES_EVENT_NUM) {
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profiling_mode = SPU_PROFILING_CYCLES;
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ret = cell_reg_setup_spu_cycles(ctr, sys, num_ctrs);
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} else {
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profiling_mode = PPU_PROFILING;
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ret = cell_reg_setup_ppu(ctr, sys, num_ctrs);
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}
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return ret;
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}
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/* This function is called once for each cpu */
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static int cell_cpu_setup(struct op_counter_config *cntr)
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@ -673,7 +696,11 @@ static int cell_cpu_setup(struct op_counter_config *cntr)
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u32 num_enabled = 0;
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int i;
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if (spu_cycle_reset)
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/* Cycle based SPU profiling does not use the performance
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* counters. The trace array is configured to collect
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* the data.
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*/
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if (profiling_mode == SPU_PROFILING_CYCLES)
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return 0;
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/* There is one performance monitor per processor chip (i.e. node),
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@ -686,7 +713,6 @@ static int cell_cpu_setup(struct op_counter_config *cntr)
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cbe_disable_pm(cpu);
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cbe_disable_pm_interrupts(cpu);
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cbe_write_pm(cpu, pm_interval, 0);
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cbe_write_pm(cpu, pm_start_stop, 0);
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cbe_write_pm(cpu, group_control, pm_regs.group_control);
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cbe_write_pm(cpu, debug_bus_control, pm_regs.debug_bus_control);
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@ -885,7 +911,94 @@ static struct notifier_block cpu_freq_notifier_block = {
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};
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#endif
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static int cell_global_start_spu(struct op_counter_config *ctr)
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/*
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* Note the generic OProfile stop calls do not support returning
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* an error on stop. Hence, will not return an error if the FW
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* calls fail on stop. Failure to reset the debug bus is not an issue.
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* Failure to disable the SPU profiling is not an issue. The FW calls
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* to enable the performance counters and debug bus will work even if
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* the hardware was not cleanly reset.
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*/
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static void cell_global_stop_spu_cycles(void)
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{
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int subfunc, rtn_value;
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unsigned int lfsr_value;
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int cpu;
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oprofile_running = 0;
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#ifdef CONFIG_CPU_FREQ
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cpufreq_unregister_notifier(&cpu_freq_notifier_block,
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CPUFREQ_TRANSITION_NOTIFIER);
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#endif
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for_each_online_cpu(cpu) {
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if (cbe_get_hw_thread_id(cpu))
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continue;
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subfunc = 3; /*
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* 2 - activate SPU tracing,
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* 3 - deactivate
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*/
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lfsr_value = 0x8f100000;
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rtn_value = rtas_call(spu_rtas_token, 3, 1, NULL,
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subfunc, cbe_cpu_to_node(cpu),
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lfsr_value);
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if (unlikely(rtn_value != 0)) {
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printk(KERN_ERR
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"%s: rtas call ibm,cbe-spu-perftools " \
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"failed, return = %d\n",
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__func__, rtn_value);
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}
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/* Deactivate the signals */
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pm_rtas_reset_signals(cbe_cpu_to_node(cpu));
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}
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if (profiling_mode == SPU_PROFILING_CYCLES)
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stop_spu_profiling_cycles();
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}
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static void cell_global_stop_ppu(void)
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{
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int cpu;
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/*
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* This routine will be called once for the system.
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* There is one performance monitor per node, so we
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* only need to perform this function once per node.
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*/
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del_timer_sync(&timer_virt_cntr);
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oprofile_running = 0;
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smp_wmb();
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for_each_online_cpu(cpu) {
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if (cbe_get_hw_thread_id(cpu))
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continue;
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cbe_sync_irq(cbe_cpu_to_node(cpu));
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/* Stop the counters */
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cbe_disable_pm(cpu);
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/* Deactivate the signals */
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pm_rtas_reset_signals(cbe_cpu_to_node(cpu));
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/* Deactivate interrupts */
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cbe_disable_pm_interrupts(cpu);
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}
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}
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static void cell_global_stop(void)
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{
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if (profiling_mode == PPU_PROFILING)
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cell_global_stop_ppu();
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else
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cell_global_stop_spu_cycles();
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}
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static int cell_global_start_spu_cycles(struct op_counter_config *ctr)
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{
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int subfunc;
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unsigned int lfsr_value;
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@ -955,14 +1068,14 @@ static int cell_global_start_spu(struct op_counter_config *ctr)
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if (unlikely(ret != 0)) {
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printk(KERN_ERR
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"%s: rtas call ibm,cbe-spu-perftools failed, return = %d\n",
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__func__, ret);
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"%s: rtas call ibm,cbe-spu-perftools failed, " \
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"return = %d\n", __func__, ret);
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rtas_error = -EIO;
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goto out;
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}
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}
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rtas_error = start_spu_profiling(spu_cycle_reset);
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rtas_error = start_spu_profiling_cycles(spu_cycle_reset);
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if (rtas_error)
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goto out_stop;
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@ -970,7 +1083,7 @@ static int cell_global_start_spu(struct op_counter_config *ctr)
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return 0;
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out_stop:
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cell_global_stop_spu(); /* clean up the PMU/debug bus */
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cell_global_stop_spu_cycles(); /* clean up the PMU/debug bus */
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out:
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return rtas_error;
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}
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@ -1024,99 +1137,15 @@ static int cell_global_start_ppu(struct op_counter_config *ctr)
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static int cell_global_start(struct op_counter_config *ctr)
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{
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if (spu_cycle_reset)
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return cell_global_start_spu(ctr);
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if (profiling_mode == SPU_PROFILING_CYCLES)
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return cell_global_start_spu_cycles(ctr);
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else
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return cell_global_start_ppu(ctr);
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}
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/*
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* Note the generic OProfile stop calls do not support returning
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* an error on stop. Hence, will not return an error if the FW
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* calls fail on stop. Failure to reset the debug bus is not an issue.
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* Failure to disable the SPU profiling is not an issue. The FW calls
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* to enable the performance counters and debug bus will work even if
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* the hardware was not cleanly reset.
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*/
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static void cell_global_stop_spu(void)
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{
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int subfunc, rtn_value;
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unsigned int lfsr_value;
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int cpu;
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oprofile_running = 0;
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#ifdef CONFIG_CPU_FREQ
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cpufreq_unregister_notifier(&cpu_freq_notifier_block,
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CPUFREQ_TRANSITION_NOTIFIER);
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#endif
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for_each_online_cpu(cpu) {
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if (cbe_get_hw_thread_id(cpu))
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continue;
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subfunc = 3; /*
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* 2 - activate SPU tracing,
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* 3 - deactivate
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*/
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lfsr_value = 0x8f100000;
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rtn_value = rtas_call(spu_rtas_token, 3, 1, NULL,
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subfunc, cbe_cpu_to_node(cpu),
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lfsr_value);
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if (unlikely(rtn_value != 0)) {
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printk(KERN_ERR
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"%s: rtas call ibm,cbe-spu-perftools failed, return = %d\n",
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__func__, rtn_value);
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||||
}
|
||||
|
||||
/* Deactivate the signals */
|
||||
pm_rtas_reset_signals(cbe_cpu_to_node(cpu));
|
||||
}
|
||||
|
||||
stop_spu_profiling();
|
||||
}
|
||||
|
||||
static void cell_global_stop_ppu(void)
|
||||
{
|
||||
int cpu;
|
||||
|
||||
/*
|
||||
* This routine will be called once for the system.
|
||||
* There is one performance monitor per node, so we
|
||||
* only need to perform this function once per node.
|
||||
*/
|
||||
del_timer_sync(&timer_virt_cntr);
|
||||
oprofile_running = 0;
|
||||
smp_wmb();
|
||||
|
||||
for_each_online_cpu(cpu) {
|
||||
if (cbe_get_hw_thread_id(cpu))
|
||||
continue;
|
||||
|
||||
cbe_sync_irq(cbe_cpu_to_node(cpu));
|
||||
/* Stop the counters */
|
||||
cbe_disable_pm(cpu);
|
||||
|
||||
/* Deactivate the signals */
|
||||
pm_rtas_reset_signals(cbe_cpu_to_node(cpu));
|
||||
|
||||
/* Deactivate interrupts */
|
||||
cbe_disable_pm_interrupts(cpu);
|
||||
}
|
||||
}
|
||||
|
||||
static void cell_global_stop(void)
|
||||
{
|
||||
if (spu_cycle_reset)
|
||||
cell_global_stop_spu();
|
||||
else
|
||||
cell_global_stop_ppu();
|
||||
}
|
||||
|
||||
static void cell_handle_interrupt(struct pt_regs *regs,
|
||||
struct op_counter_config *ctr)
|
||||
static void cell_handle_interrupt_ppu(struct pt_regs *regs,
|
||||
struct op_counter_config *ctr)
|
||||
{
|
||||
u32 cpu;
|
||||
u64 pc;
|
||||
|
|
@ -1132,7 +1161,7 @@ static void cell_handle_interrupt(struct pt_regs *regs,
|
|||
* routine are not running at the same time. See the
|
||||
* cell_virtual_cntr() routine for additional comments.
|
||||
*/
|
||||
spin_lock_irqsave(&virt_cntr_lock, flags);
|
||||
spin_lock_irqsave(&cntr_lock, flags);
|
||||
|
||||
/*
|
||||
* Need to disable and reenable the performance counters
|
||||
|
|
@ -1185,7 +1214,14 @@ static void cell_handle_interrupt(struct pt_regs *regs,
|
|||
*/
|
||||
cbe_enable_pm(cpu);
|
||||
}
|
||||
spin_unlock_irqrestore(&virt_cntr_lock, flags);
|
||||
spin_unlock_irqrestore(&cntr_lock, flags);
|
||||
}
|
||||
|
||||
static void cell_handle_interrupt(struct pt_regs *regs,
|
||||
struct op_counter_config *ctr)
|
||||
{
|
||||
if (profiling_mode == PPU_PROFILING)
|
||||
cell_handle_interrupt_ppu(regs, ctr);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1195,7 +1231,8 @@ static void cell_handle_interrupt(struct pt_regs *regs,
|
|||
*/
|
||||
static int cell_sync_start(void)
|
||||
{
|
||||
if (spu_cycle_reset)
|
||||
if ((profiling_mode == SPU_PROFILING_CYCLES) ||
|
||||
(profiling_mode == SPU_PROFILING_EVENTS))
|
||||
return spu_sync_start();
|
||||
else
|
||||
return DO_GENERIC_SYNC;
|
||||
|
|
@ -1203,7 +1240,8 @@ static int cell_sync_start(void)
|
|||
|
||||
static int cell_sync_stop(void)
|
||||
{
|
||||
if (spu_cycle_reset)
|
||||
if ((profiling_mode == SPU_PROFILING_CYCLES) ||
|
||||
(profiling_mode == SPU_PROFILING_EVENTS))
|
||||
return spu_sync_stop();
|
||||
else
|
||||
return 1;
|
||||
|
|
|
|||
Loading…
Reference in a new issue