diff options
| author | James Clark <james.clark@arm.com> | 2023-04-25 15:35:37 +0100 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2023-06-05 15:46:46 +0100 |
| commit | ae7f2b5a7b569f8ede4af9e215515e5a0b824edd (patch) | |
| tree | 84aaf498f7037425f51b897192094d47a3b31b77 /drivers/hwtracing/coresight/coresight-funnel.c | |
| parent | e3f4e68797a960869ccae556ad63163b3dc470a2 (diff) | |
coresight: Make refcount a property of the connection
This removes the need to do an additional lookup for the total number
of ports used and also removes the need to allocate an array of
refcounts which is just another representation of a connection array.
This was only used for link type devices, for regular devices a single
refcount on the coresight device is used.
There is a both an input and output refcount in case two link type
devices are connected together so that they don't overwrite each other's
counts.
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230425143542.2305069-11-james.clark@arm.com
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-funnel.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-funnel.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c index b363dd6bc510..b8e150e45b27 100644 --- a/drivers/hwtracing/coresight/coresight-funnel.c +++ b/drivers/hwtracing/coresight/coresight-funnel.c @@ -74,8 +74,9 @@ done: return rc; } -static int funnel_enable(struct coresight_device *csdev, int inport, - int outport) +static int funnel_enable(struct coresight_device *csdev, + struct coresight_connection *in, + struct coresight_connection *out) { int rc = 0; struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); @@ -83,18 +84,19 @@ static int funnel_enable(struct coresight_device *csdev, int inport, bool first_enable = false; spin_lock_irqsave(&drvdata->spinlock, flags); - if (atomic_read(&csdev->refcnt[inport]) == 0) { + if (atomic_read(&in->dest_refcnt) == 0) { if (drvdata->base) - rc = dynamic_funnel_enable_hw(drvdata, inport); + rc = dynamic_funnel_enable_hw(drvdata, in->dest_port); if (!rc) first_enable = true; } if (!rc) - atomic_inc(&csdev->refcnt[inport]); + atomic_inc(&in->dest_refcnt); spin_unlock_irqrestore(&drvdata->spinlock, flags); if (first_enable) - dev_dbg(&csdev->dev, "FUNNEL inport %d enabled\n", inport); + dev_dbg(&csdev->dev, "FUNNEL inport %d enabled\n", + in->dest_port); return rc; } @@ -117,23 +119,25 @@ static void dynamic_funnel_disable_hw(struct funnel_drvdata *drvdata, CS_LOCK(drvdata->base); } -static void funnel_disable(struct coresight_device *csdev, int inport, - int outport) +static void funnel_disable(struct coresight_device *csdev, + struct coresight_connection *in, + struct coresight_connection *out) { struct funnel_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); unsigned long flags; bool last_disable = false; spin_lock_irqsave(&drvdata->spinlock, flags); - if (atomic_dec_return(&csdev->refcnt[inport]) == 0) { + if (atomic_dec_return(&in->dest_refcnt) == 0) { if (drvdata->base) - dynamic_funnel_disable_hw(drvdata, inport); + dynamic_funnel_disable_hw(drvdata, in->dest_port); last_disable = true; } spin_unlock_irqrestore(&drvdata->spinlock, flags); if (last_disable) - dev_dbg(&csdev->dev, "FUNNEL inport %d disabled\n", inport); + dev_dbg(&csdev->dev, "FUNNEL inport %d disabled\n", + in->dest_port); } static const struct coresight_ops_link funnel_link_ops = { |