mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
clk: Add tracepoints for hardware operations
It's useful to have tracepoints around operations that change the hardware state so that we can debug clock hardware performance and operations. Four basic types of events are supported: on/off events for enable, disable, prepare, unprepare that only record an event and a clock name, rate changing events for clk_set_{min_,max_}rate{_range}(), phase changing events for clk_set_phase() and parent changing events for clk_set_parent(). Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@linaro.org>
This commit is contained in:
parent
08b9575660
commit
dfc202ead3
@ -77,6 +77,9 @@ struct clk_core {
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struct kref ref;
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struct kref ref;
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};
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};
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#define CREATE_TRACE_POINTS
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#include <trace/events/clk.h>
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struct clk {
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struct clk {
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struct clk_core *core;
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struct clk_core *core;
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const char *dev_id;
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const char *dev_id;
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@ -492,10 +495,12 @@ static void clk_unprepare_unused_subtree(struct clk_core *clk)
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return;
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return;
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if (clk_core_is_prepared(clk)) {
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if (clk_core_is_prepared(clk)) {
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trace_clk_unprepare(clk);
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if (clk->ops->unprepare_unused)
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if (clk->ops->unprepare_unused)
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clk->ops->unprepare_unused(clk->hw);
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clk->ops->unprepare_unused(clk->hw);
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else if (clk->ops->unprepare)
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else if (clk->ops->unprepare)
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clk->ops->unprepare(clk->hw);
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clk->ops->unprepare(clk->hw);
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trace_clk_unprepare_complete(clk);
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}
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}
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}
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}
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@ -524,10 +529,12 @@ static void clk_disable_unused_subtree(struct clk_core *clk)
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* back to .disable
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* back to .disable
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*/
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*/
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if (clk_core_is_enabled(clk)) {
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if (clk_core_is_enabled(clk)) {
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trace_clk_disable(clk);
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if (clk->ops->disable_unused)
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if (clk->ops->disable_unused)
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clk->ops->disable_unused(clk->hw);
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clk->ops->disable_unused(clk->hw);
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else if (clk->ops->disable)
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else if (clk->ops->disable)
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clk->ops->disable(clk->hw);
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clk->ops->disable(clk->hw);
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trace_clk_disable_complete(clk);
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}
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}
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unlock_out:
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unlock_out:
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@ -907,9 +914,12 @@ static void clk_core_unprepare(struct clk_core *clk)
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WARN_ON(clk->enable_count > 0);
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WARN_ON(clk->enable_count > 0);
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trace_clk_unprepare(clk);
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if (clk->ops->unprepare)
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if (clk->ops->unprepare)
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clk->ops->unprepare(clk->hw);
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clk->ops->unprepare(clk->hw);
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trace_clk_unprepare_complete(clk);
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clk_core_unprepare(clk->parent);
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clk_core_unprepare(clk->parent);
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}
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}
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@ -947,12 +957,16 @@ static int clk_core_prepare(struct clk_core *clk)
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if (ret)
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if (ret)
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return ret;
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return ret;
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if (clk->ops->prepare) {
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trace_clk_prepare(clk);
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if (clk->ops->prepare)
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ret = clk->ops->prepare(clk->hw);
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ret = clk->ops->prepare(clk->hw);
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if (ret) {
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clk_core_unprepare(clk->parent);
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trace_clk_prepare_complete(clk);
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return ret;
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}
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if (ret) {
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clk_core_unprepare(clk->parent);
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return ret;
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}
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}
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}
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}
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@ -999,9 +1013,13 @@ static void clk_core_disable(struct clk_core *clk)
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if (--clk->enable_count > 0)
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if (--clk->enable_count > 0)
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return;
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return;
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trace_clk_disable(clk);
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if (clk->ops->disable)
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if (clk->ops->disable)
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clk->ops->disable(clk->hw);
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clk->ops->disable(clk->hw);
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trace_clk_disable_complete(clk);
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clk_core_disable(clk->parent);
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clk_core_disable(clk->parent);
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}
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}
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@ -1054,12 +1072,16 @@ static int clk_core_enable(struct clk_core *clk)
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if (ret)
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if (ret)
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return ret;
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return ret;
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if (clk->ops->enable) {
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trace_clk_enable(clk);
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if (clk->ops->enable)
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ret = clk->ops->enable(clk->hw);
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ret = clk->ops->enable(clk->hw);
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if (ret) {
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clk_core_disable(clk->parent);
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trace_clk_enable_complete(clk);
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return ret;
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}
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if (ret) {
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clk_core_disable(clk->parent);
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return ret;
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}
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}
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}
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}
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@ -1490,10 +1512,14 @@ static int __clk_set_parent(struct clk_core *clk, struct clk_core *parent,
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old_parent = __clk_set_parent_before(clk, parent);
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old_parent = __clk_set_parent_before(clk, parent);
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trace_clk_set_parent(clk, parent);
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/* change clock input source */
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/* change clock input source */
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if (parent && clk->ops->set_parent)
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if (parent && clk->ops->set_parent)
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ret = clk->ops->set_parent(clk->hw, p_index);
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ret = clk->ops->set_parent(clk->hw, p_index);
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trace_clk_set_parent_complete(clk, parent);
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if (ret) {
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if (ret) {
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flags = clk_enable_lock();
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flags = clk_enable_lock();
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clk_reparent(clk, old_parent);
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clk_reparent(clk, old_parent);
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@ -1719,6 +1745,7 @@ static void clk_change_rate(struct clk_core *clk)
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if (clk->new_parent && clk->new_parent != clk->parent) {
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if (clk->new_parent && clk->new_parent != clk->parent) {
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old_parent = __clk_set_parent_before(clk, clk->new_parent);
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old_parent = __clk_set_parent_before(clk, clk->new_parent);
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trace_clk_set_parent(clk, clk->new_parent);
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if (clk->ops->set_rate_and_parent) {
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if (clk->ops->set_rate_and_parent) {
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skip_set_rate = true;
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skip_set_rate = true;
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@ -1729,12 +1756,17 @@ static void clk_change_rate(struct clk_core *clk)
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clk->ops->set_parent(clk->hw, clk->new_parent_index);
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clk->ops->set_parent(clk->hw, clk->new_parent_index);
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}
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}
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trace_clk_set_parent_complete(clk, clk->new_parent);
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__clk_set_parent_after(clk, clk->new_parent, old_parent);
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__clk_set_parent_after(clk, clk->new_parent, old_parent);
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}
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}
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trace_clk_set_rate(clk, clk->new_rate);
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if (!skip_set_rate && clk->ops->set_rate)
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if (!skip_set_rate && clk->ops->set_rate)
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clk->ops->set_rate(clk->hw, clk->new_rate, best_parent_rate);
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clk->ops->set_rate(clk->hw, clk->new_rate, best_parent_rate);
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trace_clk_set_rate_complete(clk, clk->new_rate);
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clk->rate = clk_recalc(clk, best_parent_rate);
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clk->rate = clk_recalc(clk, best_parent_rate);
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if (clk->notifier_count && old_rate != clk->rate)
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if (clk->notifier_count && old_rate != clk->rate)
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@ -2135,9 +2167,13 @@ int clk_set_phase(struct clk *clk, int degrees)
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clk_prepare_lock();
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clk_prepare_lock();
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trace_clk_set_phase(clk->core, degrees);
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if (clk->core->ops->set_phase)
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if (clk->core->ops->set_phase)
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ret = clk->core->ops->set_phase(clk->core->hw, degrees);
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ret = clk->core->ops->set_phase(clk->core->hw, degrees);
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trace_clk_set_phase_complete(clk->core, degrees);
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if (!ret)
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if (!ret)
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clk->core->phase = degrees;
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clk->core->phase = degrees;
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198
include/trace/events/clk.h
Normal file
198
include/trace/events/clk.h
Normal file
@ -0,0 +1,198 @@
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/*
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* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM clk
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#if !defined(_TRACE_CLK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_CLK_H
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#include <linux/tracepoint.h>
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struct clk_core;
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DECLARE_EVENT_CLASS(clk,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core),
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TP_STRUCT__entry(
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__string( name, core->name )
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),
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TP_fast_assign(
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__assign_str(name, core->name);
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),
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TP_printk("%s", __get_str(name))
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);
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DEFINE_EVENT(clk, clk_enable,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DEFINE_EVENT(clk, clk_enable_complete,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DEFINE_EVENT(clk, clk_disable,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DEFINE_EVENT(clk, clk_disable_complete,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DEFINE_EVENT(clk, clk_prepare,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DEFINE_EVENT(clk, clk_prepare_complete,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DEFINE_EVENT(clk, clk_unprepare,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DEFINE_EVENT(clk, clk_unprepare_complete,
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TP_PROTO(struct clk_core *core),
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TP_ARGS(core)
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);
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DECLARE_EVENT_CLASS(clk_rate,
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TP_PROTO(struct clk_core *core, unsigned long rate),
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TP_ARGS(core, rate),
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TP_STRUCT__entry(
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__string( name, core->name )
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__field(unsigned long, rate )
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),
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TP_fast_assign(
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__assign_str(name, core->name);
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__entry->rate = rate;
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),
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TP_printk("%s %lu", __get_str(name), (unsigned long)__entry->rate)
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);
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DEFINE_EVENT(clk_rate, clk_set_rate,
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TP_PROTO(struct clk_core *core, unsigned long rate),
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TP_ARGS(core, rate)
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);
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DEFINE_EVENT(clk_rate, clk_set_rate_complete,
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TP_PROTO(struct clk_core *core, unsigned long rate),
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TP_ARGS(core, rate)
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);
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DECLARE_EVENT_CLASS(clk_parent,
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TP_PROTO(struct clk_core *core, struct clk_core *parent),
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TP_ARGS(core, parent),
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TP_STRUCT__entry(
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__string( name, core->name )
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__string( pname, parent->name )
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),
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TP_fast_assign(
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__assign_str(name, core->name);
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__assign_str(pname, parent->name);
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),
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TP_printk("%s %s", __get_str(name), __get_str(pname))
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);
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DEFINE_EVENT(clk_parent, clk_set_parent,
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TP_PROTO(struct clk_core *core, struct clk_core *parent),
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TP_ARGS(core, parent)
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);
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DEFINE_EVENT(clk_parent, clk_set_parent_complete,
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TP_PROTO(struct clk_core *core, struct clk_core *parent),
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TP_ARGS(core, parent)
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);
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DECLARE_EVENT_CLASS(clk_phase,
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TP_PROTO(struct clk_core *core, int phase),
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TP_ARGS(core, phase),
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TP_STRUCT__entry(
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__string( name, core->name )
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__field( int, phase )
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),
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TP_fast_assign(
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__assign_str(name, core->name);
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__entry->phase = phase;
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),
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TP_printk("%s %d", __get_str(name), (int)__entry->phase)
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);
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DEFINE_EVENT(clk_phase, clk_set_phase,
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TP_PROTO(struct clk_core *core, int phase),
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TP_ARGS(core, phase)
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);
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DEFINE_EVENT(clk_phase, clk_set_phase_complete,
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TP_PROTO(struct clk_core *core, int phase),
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TP_ARGS(core, phase)
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);
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#endif /* _TRACE_CLK_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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