[PATCH V3 07/26] coresight: moving PM runtime operations to core framework
From: mathieu.poirier@linaro.org (Mathieu Poirier)
Date: 2015-11-11 22:28:09
Also in:
lkml
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
Moving PM runtime operations in Coresight devices enable() and disable() API to the framework core when a path is setup. That way the runtime core doesn't have to be involved everytime a path is enabled. It also avoids calling runtime PM operations in IRQ context. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- drivers/hwtracing/coresight/coresight-etb10.c | 4 ---- drivers/hwtracing/coresight/coresight-etm3x.c | 3 --- drivers/hwtracing/coresight/coresight-etm4x.c | 6 ------ drivers/hwtracing/coresight/coresight-funnel.c | 2 -- drivers/hwtracing/coresight/coresight-replicator-qcom.c | 4 ---- drivers/hwtracing/coresight/coresight-replicator.c | 2 -- drivers/hwtracing/coresight/coresight-tmc.c | 5 ----- drivers/hwtracing/coresight/coresight-tpiu.c | 2 -- drivers/hwtracing/coresight/coresight.c | 9 ++++++++- 9 files changed, 8 insertions(+), 29 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 77d0f9c1118d..1301edc44629 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c@@ -137,8 +137,6 @@ static int etb_enable(struct coresight_device *csdev) struct etb_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); unsigned long flags; - pm_runtime_get_sync(drvdata->dev); - spin_lock_irqsave(&drvdata->spinlock, flags); etb_enable_hw(drvdata); drvdata->enable = true;
@@ -247,8 +245,6 @@ static void etb_disable(struct coresight_device *csdev) drvdata->enable = false; spin_unlock_irqrestore(&drvdata->spinlock, flags); - pm_runtime_put(drvdata->dev); - dev_info(drvdata->dev, "ETB disabled\n"); }
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index 74526f044a06..660c1e07601b 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c@@ -358,7 +358,6 @@ static int etm_enable(struct coresight_device *csdev) struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); int ret; - pm_runtime_get_sync(csdev->dev.parent); spin_lock(&drvdata->spinlock); /*
@@ -382,7 +381,6 @@ static int etm_enable(struct coresight_device *csdev) return 0; err: spin_unlock(&drvdata->spinlock); - pm_runtime_put(csdev->dev.parent); return ret; }
@@ -439,7 +437,6 @@ static void etm_disable(struct coresight_device *csdev) spin_unlock(&drvdata->spinlock); put_online_cpus(); - pm_runtime_put(csdev->dev.parent); dev_info(drvdata->dev, "ETM tracing disabled\n"); }
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 254a81a4e6f4..a62e94814c37 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c@@ -72,7 +72,6 @@ static int etm4_trace_id(struct coresight_device *csdev) if (!drvdata->enable) return drvdata->trcid; - pm_runtime_get_sync(drvdata->dev); spin_lock_irqsave(&drvdata->spinlock, flags); CS_UNLOCK(drvdata->base);
@@ -81,7 +80,6 @@ static int etm4_trace_id(struct coresight_device *csdev) CS_LOCK(drvdata->base); spin_unlock_irqrestore(&drvdata->spinlock, flags); - pm_runtime_put(drvdata->dev); return trace_id; }
@@ -185,7 +183,6 @@ static int etm4_enable(struct coresight_device *csdev) struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); int ret; - pm_runtime_get_sync(drvdata->dev); spin_lock(&drvdata->spinlock); /*
@@ -205,7 +202,6 @@ static int etm4_enable(struct coresight_device *csdev) return 0; err: spin_unlock(&drvdata->spinlock); - pm_runtime_put(drvdata->dev); return ret; }
@@ -254,8 +250,6 @@ static void etm4_disable(struct coresight_device *csdev) spin_unlock(&drvdata->spinlock); put_online_cpus(); - pm_runtime_put(drvdata->dev); - dev_info(drvdata->dev, "ETM tracing disabled\n"); }
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index 2e36bde7fcb4..a47bba361833 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c@@ -69,7 +69,6 @@ static int funnel_enable(struct coresight_device *csdev, int inport, { struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - pm_runtime_get_sync(drvdata->dev); funnel_enable_hw(drvdata, inport); dev_info(drvdata->dev, "FUNNEL inport %d enabled\n", inport);
@@ -95,7 +94,6 @@ static void funnel_disable(struct coresight_device *csdev, int inport, struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); funnel_disable_hw(drvdata, inport); - pm_runtime_put(drvdata->dev); dev_info(drvdata->dev, "FUNNEL inport %d disabled\n", inport); }
diff --git a/drivers/hwtracing/coresight/coresight-replicator-qcom.c b/drivers/hwtracing/coresight/coresight-replicator-qcom.c
index 584059e9e866..8149087e8966 100644
--- a/drivers/hwtracing/coresight/coresight-replicator-qcom.c
+++ b/drivers/hwtracing/coresight/coresight-replicator-qcom.c@@ -48,8 +48,6 @@ static int replicator_enable(struct coresight_device *csdev, int inport, { struct replicator_state *drvdata = dev_get_drvdata(csdev->dev.parent); - pm_runtime_get_sync(drvdata->dev); - CS_UNLOCK(drvdata->base); /*
@@ -86,8 +84,6 @@ static void replicator_disable(struct coresight_device *csdev, int inport, CS_LOCK(drvdata->base); - pm_runtime_put(drvdata->dev); - dev_info(drvdata->dev, "REPLICATOR disabled\n"); }
diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 963ac197c253..a0fbb2e05389 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c@@ -41,7 +41,6 @@ static int replicator_enable(struct coresight_device *csdev, int inport, { struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - pm_runtime_get_sync(drvdata->dev); dev_info(drvdata->dev, "REPLICATOR enabled\n"); return 0; }
@@ -51,7 +50,6 @@ static void replicator_disable(struct coresight_device *csdev, int inport, { struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - pm_runtime_put(drvdata->dev); dev_info(drvdata->dev, "REPLICATOR disabled\n"); }
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index a57c7ec1661f..5e2a71767870 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c@@ -242,12 +242,9 @@ static int tmc_enable(struct tmc_drvdata *drvdata, enum tmc_mode mode) { unsigned long flags; - pm_runtime_get_sync(drvdata->dev); - spin_lock_irqsave(&drvdata->spinlock, flags); if (drvdata->reading) { spin_unlock_irqrestore(&drvdata->spinlock, flags); - pm_runtime_put(drvdata->dev); return -EBUSY; }
@@ -381,8 +378,6 @@ out: drvdata->enable = false; spin_unlock_irqrestore(&drvdata->spinlock, flags); - pm_runtime_put(drvdata->dev); - dev_info(drvdata->dev, "TMC disabled\n"); }
diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
index 7214efd10db5..e19b86e61c38 100644
--- a/drivers/hwtracing/coresight/coresight-tpiu.c
+++ b/drivers/hwtracing/coresight/coresight-tpiu.c@@ -74,7 +74,6 @@ static int tpiu_enable(struct coresight_device *csdev) { struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - pm_runtime_get_sync(csdev->dev.parent); tpiu_enable_hw(drvdata); dev_info(drvdata->dev, "TPIU enabled\n");
@@ -98,7 +97,6 @@ static void tpiu_disable(struct coresight_device *csdev) struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); tpiu_disable_hw(drvdata); - pm_runtime_put(csdev->dev.parent); dev_info(drvdata->dev, "TPIU disabled\n"); }
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 4beea67fd5a1..a4103a216e33 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c@@ -24,6 +24,7 @@ #include <linux/coresight.h> #include <linux/of_platform.h> #include <linux/delay.h> +#include <linux/pm_runtime.h> #include "coresight-priv.h"
@@ -361,7 +362,8 @@ out: /* * A path from this element to a sink has been found. The elements * leading to the sink are already enqueued, all that is left to do - * is add a node for this element. + * is tell the PM runtime core we need this element and add a node + * for it. */ node = kzalloc(sizeof(struct coresight_node), GFP_KERNEL); if (!node)
@@ -369,6 +371,7 @@ out: node->csdev = csdev; list_add(&node->link, path); + pm_runtime_get_sync(csdev->dev.parent); return 0; }
@@ -400,9 +403,13 @@ struct list_head *coresight_build_path(struct coresight_device *csdev) */ void coresight_release_path(struct list_head *path) { + struct coresight_device *csdev; struct coresight_node *nd, *next; list_for_each_entry_safe(nd, next, path, link) { + csdev = nd->csdev; + + pm_runtime_put_sync(csdev->dev.parent); list_del(&nd->link); kfree(nd); }
--
1.9.1