lkml.org 
[lkml]   [2017]   [Jun]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v1 4/4] coresight: etb10: hook panic callback
    Date
    This patch is to hook panic callback for etb10 driver; so after panic
    can dump trace data from it.

    Signed-off-by: Leo Yan <leo.yan@linaro.org>
    ---
    drivers/hwtracing/coresight/coresight-etb10.c | 16 ++++++++++++++++
    1 file changed, 16 insertions(+)

    diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
    index 979ea6e..c9ea281 100644
    --- a/drivers/hwtracing/coresight/coresight-etb10.c
    +++ b/drivers/hwtracing/coresight/coresight-etb10.c
    @@ -473,6 +473,21 @@ static void etb_update_buffer(struct coresight_device *csdev,
    CS_LOCK(drvdata->base);
    }

    +static int etb_panic_cb(struct coresight_device *csdev)
    +{
    + struct etb_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
    + unsigned long flags;
    +
    + spin_lock_irqsave(&drvdata->spinlock, flags);
    + etb_disable_hw(drvdata);
    + etb_dump_hw(drvdata);
    + spin_unlock_irqrestore(&drvdata->spinlock, flags);
    +
    + dev_err(drvdata->dev, "Dump ETB buffer 0x%x@0x%p\n",
    + drvdata->buffer_depth, drvdata->buf);
    + return 0;
    +}
    +
    static const struct coresight_ops_sink etb_sink_ops = {
    .enable = etb_enable,
    .disable = etb_disable,
    @@ -481,6 +496,7 @@ static const struct coresight_ops_sink etb_sink_ops = {
    .set_buffer = etb_set_buffer,
    .reset_buffer = etb_reset_buffer,
    .update_buffer = etb_update_buffer,
    + .panic_cb = etb_panic_cb,
    };

    static const struct coresight_ops etb_cs_ops = {
    --
    2.7.4
    \
     
     \ /
      Last update: 2017-06-05 00:17    [W:2.807 / U:0.392 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site