| Message ID | 20250226041342.53933-6-quic_jiegan@quicinc.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Coresight: Add Coresight TMC Control Unit driver | expand |
On 2/26/2025 12:13 PM, Jie Gan wrote: > The trace_id will be stored in coresight_path instead of being declared > everywhere and allocated after building the path. > > Signed-off-by: Jie Gan <quic_jiegan@quicinc.com> Correct tags: Co-developed-by: James Clark <james.clark@linaro.org> Signed-off-by: James Clark <james.clark@linaro.org> Signed-off-by: Jie Gan <quic_jiegan@quicinc.com> Jie > --- > drivers/hwtracing/coresight/coresight-core.c | 44 +++++++++++++++++++ > .../hwtracing/coresight/coresight-etm-perf.c | 5 +-- > drivers/hwtracing/coresight/coresight-priv.h | 2 + > drivers/hwtracing/coresight/coresight-sysfs.c | 4 ++ > 4 files changed, 52 insertions(+), 3 deletions(-) > > diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c > index 9c2a088a28d8..7d010d996f01 100644 > --- a/drivers/hwtracing/coresight/coresight-core.c > +++ b/drivers/hwtracing/coresight/coresight-core.c > @@ -654,6 +654,50 @@ static void coresight_drop_device(struct coresight_device *csdev) > } > } > > +/* > + * coresight device will read their existing or alloc a trace ID, if their trace_id > + * callback is set. > + * > + * Return 0 if the trace_id callback is not set. > + * Return the result of the trace_id callback if it is set. The return value > + * will be the trace_id if successful, and an error number if it fails. > + */ > +static int coresight_get_trace_id(struct coresight_device *csdev, > + enum cs_mode mode, > + struct coresight_device *sink) > +{ > + if (coresight_ops(csdev)->trace_id) > + return coresight_ops(csdev)->trace_id(csdev, mode, sink); > + > + return 0; > +} > + > +/* > + * Call this after creating the path and before enabling it. This leaves > + * the trace ID set on the path, or it remains 0 if it couldn't be assigned. > + */ > +void coresight_path_assign_trace_id(struct coresight_path *path, > + enum cs_mode mode) > +{ > + struct coresight_device *sink = coresight_get_sink(&path->path_list); > + struct coresight_node *nd; > + int trace_id; > + > + list_for_each_entry(nd, &path->path_list, link) { > + /* Assign a trace ID to the path for the first device that wants to do it */ > + trace_id = coresight_get_trace_id(nd->csdev, mode, sink); > + > + /* > + * 0 in this context is that it didn't want to assign so keep searching. > + * Non 0 is either success or fail. > + */ > + if (trace_id != 0) { > + path->trace_id = trace_id; > + return; > + } > + } > +} > + > /** > * _coresight_build_path - recursively build a path from a @csdev to a sink. > * @csdev: The device to start from. > diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c > index b0426792f08a..134290ab622e 100644 > --- a/drivers/hwtracing/coresight/coresight-etm-perf.c > +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c > @@ -319,7 +319,6 @@ static void *etm_setup_aux(struct perf_event *event, void **pages, > { > u32 id, cfg_hash; > int cpu = event->cpu; > - int trace_id; > cpumask_t *mask; > struct coresight_device *sink = NULL; > struct coresight_device *user_sink = NULL, *last_sink = NULL; > @@ -409,8 +408,8 @@ static void *etm_setup_aux(struct perf_event *event, void **pages, > } > > /* ensure we can allocate a trace ID for this CPU */ > - trace_id = coresight_trace_id_get_cpu_id_map(cpu, &sink->perf_sink_id_map); > - if (!IS_VALID_CS_TRACE_ID(trace_id)) { > + coresight_path_assign_trace_id(path, CS_MODE_PERF); > + if (!IS_VALID_CS_TRACE_ID(path->trace_id)) { > cpumask_clear_cpu(cpu, mask); > coresight_release_path(path); > continue; > diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h > index 27b7dc348d4a..2bea35bae0d4 100644 > --- a/drivers/hwtracing/coresight/coresight-priv.h > +++ b/drivers/hwtracing/coresight/coresight-priv.h > @@ -152,6 +152,8 @@ int coresight_make_links(struct coresight_device *orig, > void coresight_remove_links(struct coresight_device *orig, > struct coresight_connection *conn); > u32 coresight_get_sink_id(struct coresight_device *csdev); > +void coresight_path_assign_trace_id(struct coresight_path *path, > + enum cs_mode mode); > > #if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM3X) > extern int etm_readl_cp14(u32 off, unsigned int *val); > diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c > index cb4c39732d26..d03751bf3d8a 100644 > --- a/drivers/hwtracing/coresight/coresight-sysfs.c > +++ b/drivers/hwtracing/coresight/coresight-sysfs.c > @@ -209,6 +209,10 @@ int coresight_enable_sysfs(struct coresight_device *csdev) > goto out; > } > > + coresight_path_assign_trace_id(path, CS_MODE_SYSFS); > + if (!IS_VALID_CS_TRACE_ID(path->trace_id)) > + goto err_path; > + > ret = coresight_enable_path(&path->path_list, CS_MODE_SYSFS, NULL); > if (ret) > goto err_path;
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 9c2a088a28d8..7d010d996f01 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -654,6 +654,50 @@ static void coresight_drop_device(struct coresight_device *csdev) } } +/* + * coresight device will read their existing or alloc a trace ID, if their trace_id + * callback is set. + * + * Return 0 if the trace_id callback is not set. + * Return the result of the trace_id callback if it is set. The return value + * will be the trace_id if successful, and an error number if it fails. + */ +static int coresight_get_trace_id(struct coresight_device *csdev, + enum cs_mode mode, + struct coresight_device *sink) +{ + if (coresight_ops(csdev)->trace_id) + return coresight_ops(csdev)->trace_id(csdev, mode, sink); + + return 0; +} + +/* + * Call this after creating the path and before enabling it. This leaves + * the trace ID set on the path, or it remains 0 if it couldn't be assigned. + */ +void coresight_path_assign_trace_id(struct coresight_path *path, + enum cs_mode mode) +{ + struct coresight_device *sink = coresight_get_sink(&path->path_list); + struct coresight_node *nd; + int trace_id; + + list_for_each_entry(nd, &path->path_list, link) { + /* Assign a trace ID to the path for the first device that wants to do it */ + trace_id = coresight_get_trace_id(nd->csdev, mode, sink); + + /* + * 0 in this context is that it didn't want to assign so keep searching. + * Non 0 is either success or fail. + */ + if (trace_id != 0) { + path->trace_id = trace_id; + return; + } + } +} + /** * _coresight_build_path - recursively build a path from a @csdev to a sink. * @csdev: The device to start from. diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index b0426792f08a..134290ab622e 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -319,7 +319,6 @@ static void *etm_setup_aux(struct perf_event *event, void **pages, { u32 id, cfg_hash; int cpu = event->cpu; - int trace_id; cpumask_t *mask; struct coresight_device *sink = NULL; struct coresight_device *user_sink = NULL, *last_sink = NULL; @@ -409,8 +408,8 @@ static void *etm_setup_aux(struct perf_event *event, void **pages, } /* ensure we can allocate a trace ID for this CPU */ - trace_id = coresight_trace_id_get_cpu_id_map(cpu, &sink->perf_sink_id_map); - if (!IS_VALID_CS_TRACE_ID(trace_id)) { + coresight_path_assign_trace_id(path, CS_MODE_PERF); + if (!IS_VALID_CS_TRACE_ID(path->trace_id)) { cpumask_clear_cpu(cpu, mask); coresight_release_path(path); continue; diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 27b7dc348d4a..2bea35bae0d4 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -152,6 +152,8 @@ int coresight_make_links(struct coresight_device *orig, void coresight_remove_links(struct coresight_device *orig, struct coresight_connection *conn); u32 coresight_get_sink_id(struct coresight_device *csdev); +void coresight_path_assign_trace_id(struct coresight_path *path, + enum cs_mode mode); #if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM3X) extern int etm_readl_cp14(u32 off, unsigned int *val); diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c index cb4c39732d26..d03751bf3d8a 100644 --- a/drivers/hwtracing/coresight/coresight-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-sysfs.c @@ -209,6 +209,10 @@ int coresight_enable_sysfs(struct coresight_device *csdev) goto out; } + coresight_path_assign_trace_id(path, CS_MODE_SYSFS); + if (!IS_VALID_CS_TRACE_ID(path->trace_id)) + goto err_path; + ret = coresight_enable_path(&path->path_list, CS_MODE_SYSFS, NULL); if (ret) goto err_path;
The trace_id will be stored in coresight_path instead of being declared everywhere and allocated after building the path. Signed-off-by: Jie Gan <quic_jiegan@quicinc.com> --- drivers/hwtracing/coresight/coresight-core.c | 44 +++++++++++++++++++ .../hwtracing/coresight/coresight-etm-perf.c | 5 +-- drivers/hwtracing/coresight/coresight-priv.h | 2 + drivers/hwtracing/coresight/coresight-sysfs.c | 4 ++ 4 files changed, 52 insertions(+), 3 deletions(-)