From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
bjorn.andersson@linaro.org, ohad@wizery.com,
tsoni@codeaurora.org, psodagud@codeaurora.org,
sidgup@codeaurora.org
Subject: Re: [PATCH 3/3] remoteproc: Add coredump sysfs attribute
Date: Thu, 23 Apr 2020 14:47:56 -0600 [thread overview]
Message-ID: <20200423204756.GA4548@xps15> (raw)
In-Reply-To: <1587062312-4939-3-git-send-email-rishabhb@codeaurora.org>
On Thu, Apr 16, 2020 at 11:38:32AM -0700, Rishabh Bhatnagar wrote:
> Add coredump sysfs attribute to configure the type of memory dump.
> User can select between default or inline coredump functionality.
> Also coredump collection can be disabled through this interface.
> This functionality can be configured differently for different
> remote processors.
> This provides an option to dynamically configure the dump type
> based on userpsace capability.
>
> Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
> ---
> drivers/remoteproc/remoteproc_sysfs.c | 57 +++++++++++++++++++++++++++++++++++
> 1 file changed, 57 insertions(+)
>
> diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
> index 7f8536b..d112664 100644
> --- a/drivers/remoteproc/remoteproc_sysfs.c
> +++ b/drivers/remoteproc/remoteproc_sysfs.c
> @@ -9,6 +9,62 @@
>
> #define to_rproc(d) container_of(d, struct rproc, dev)
>
> +/*
> + * A coredump-configuration-to-string lookup table, for exposing a
> + * human readable configuration via sysfs. Always keep in sync with
> + * enum rproc_coredump_conf
> + */
> +static const char * const rproc_coredump_str[] = {
> + [COREDUMP_DEFAULT] = "default",
> + [COREDUMP_INLINE] = "inline",
> + [COREDUMP_DISABLED] = "disabled",
> +};
> +
> +/* Expose the current coredump configuration via sysfs */
> +static ssize_t coredump_show(struct device *dev, struct device_attribute *attr,
> + char *buf)
> +{
> + struct rproc *rproc = to_rproc(dev);
> +
> + return sprintf(buf, "%s\n", rproc_coredump_str[rproc->coredump_conf]);
> +}
> +
> +/* Change the coredump configuration via sysfs */
> +static ssize_t coredump_store(struct device *dev, struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct rproc *rproc = to_rproc(dev);
> + int err;
> +
> + err = mutex_lock_interruptible(&rproc->lock);
> + if (err) {
> + dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, err);
> + return -EINVAL;
> + }
> +
> + if (rproc->state == RPROC_CRASHED) {
> + dev_err(dev, "can't change coredump configuration\n");
> + err = -EBUSY;
> + goto out;
> + }
> +
> + if (sysfs_streq(buf, "disable"))
> + rproc->coredump_conf = COREDUMP_DISABLED;
> + else if (sysfs_streq(buf, "inline"))
> + rproc->coredump_conf = COREDUMP_INLINE;
> + else if (sysfs_streq(buf, "default"))
> + rproc->coredump_conf = COREDUMP_DEFAULT;
> + else {
> + dev_err(dev, "Invalid coredump configuration\n");
> + err = -EINVAL;
> + }
> +out:
> + mutex_unlock(&rproc->lock);
> +
> + return err ? err : count;
> +}
> +static DEVICE_ATTR_RW(coredump);
> +
> /* Expose the loaded / running firmware name via sysfs */
> static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
> char *buf)
> @@ -127,6 +183,7 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr,
> &dev_attr_firmware.attr,
> &dev_attr_state.attr,
> &dev_attr_name.attr,
> + &dev_attr_coredump.attr,
This new entry needs to be documented in [1]. The set also needs to be rebased
on rproc-next.
Thanks,
Mathieu
[1]. https://elixir.bootlin.com/linux/v5.7-rc2/source/Documentation/ABI/testing/sysfs-class-remoteproc
> NULL
> };
>
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2020-04-23 20:48 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-16 18:38 [PATCH 1/3] remoteproc: Make coredump functionality configurable Rishabh Bhatnagar
2020-04-16 18:38 ` Rishabh Bhatnagar
2020-04-16 18:38 ` [PATCH 2/3] remoteproc: Add inline coredump functionality Rishabh Bhatnagar
2020-04-16 18:38 ` Rishabh Bhatnagar
2020-04-17 7:52 ` Loic PALLARDY
2020-04-17 7:52 ` Loic PALLARDY
2020-04-17 17:11 ` Bjorn Andersson
2020-04-17 17:11 ` Bjorn Andersson
2020-04-20 6:01 ` kbuild test robot
2020-04-20 6:01 ` kbuild test robot
2020-04-23 20:38 ` Mathieu Poirier
2020-05-07 20:21 ` Bjorn Andersson
2020-05-12 0:11 ` rishabhb
2020-05-12 0:30 ` Bjorn Andersson
2020-05-12 0:41 ` rishabhb
2020-05-12 5:13 ` Bjorn Andersson
2020-05-13 18:05 ` Mathieu Poirier
2020-05-14 18:07 ` rishabhb
2020-04-16 18:38 ` [PATCH 3/3] remoteproc: Add coredump sysfs attribute Rishabh Bhatnagar
2020-04-16 18:38 ` Rishabh Bhatnagar
2020-04-17 7:54 ` Loic PALLARDY
2020-04-17 7:54 ` Loic PALLARDY
2020-04-17 17:48 ` rishabhb
2020-04-17 17:48 ` rishabhb
2020-04-23 20:47 ` Mathieu Poirier [this message]
2020-04-23 18:07 ` [PATCH 1/3] remoteproc: Make coredump functionality configurable Mathieu Poirier
2020-05-07 19:33 ` Bjorn Andersson
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