On Sat, Sep 26, 2020 at 10:59:05AM +0200, Cezary Rojewski wrote:
> Add sysfs entries for displaying version of FW currently in use as well
> as dumping full FW information including build and log-providers hashes.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Signed-off-by: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
> Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
>
> Changes in v9:
> - fixed newlines in sysfs as requested by Andy, left tags as no other
> changes done
>
> Changes in v7:
> - fixed licence header for fs.c
> - renamed fs.c to sysfs.c to better match its purpose
> - added documentation within Documentation/ABI/testing for entries
> exposed by catpt
> - bin_attribute fw_build replaced by attribute fw_info:
> fw_info contains full FW information and after successful handshake,
> it's always available (stored in driver data) so no need to invoke
> GET_FW_VERSION IPC again, just dump the stored information
> - rather than manually creating and removing sysfs files, now makes use
> of dev_groups member of struct device_driver
>
> Changes in v6:
> - functions declaration and usage now part of this patch instead of
> being separated from it
>
> Changes in v2:
> - fixed size provided to memcpy() in fw_build_read() as reported by Mark
>
> .../ABI/testing/sysfs-bus-pci-devices-catpt | 16 ++++++
> sound/soc/intel/catpt/core.h | 2 +
> sound/soc/intel/catpt/device.c | 1 +
> sound/soc/intel/catpt/sysfs.c | 55 +++++++++++++++++++
> 4 files changed, 74 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-bus-pci-devices-catpt
> create mode 100644 sound/soc/intel/catpt/sysfs.c
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-catpt b/Documentation/ABI/testing/sysfs-bus-pci-devices-catpt
> new file mode 100644
> index 000000000000..8a200f4eefbd
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-catpt
> @@ -0,0 +1,16 @@
> +What: /sys/devices/pci0000:00/<dev>/fw_version
> +Date: September 2020
> +Contact: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
> +Description:
> + Version of AudioDSP firmware ASoC catpt driver is
> + communicating with.
> + Format: %d.%d.%d.%d, type:major:minor:build.
> +
> +What: /sys/devices/pci0000:00/<dev>/fw_info
> +Date: September 2020
> +Contact: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
> +Description:
> + Detailed AudioDSP firmware build information including
> + build hash and log-providers hash. This information is
> + obtained during initial handshake with firmware.
> + Format: %s.
> diff --git a/sound/soc/intel/catpt/core.h b/sound/soc/intel/catpt/core.h
> index a29b4c0232cb..88dc3fb6306f 100644
> --- a/sound/soc/intel/catpt/core.h
> +++ b/sound/soc/intel/catpt/core.h
> @@ -15,6 +15,8 @@
>
> struct catpt_dev;
>
> +extern const struct attribute_group *catpt_attr_groups[];
> +
> void catpt_sram_init(struct resource *sram, u32 start, u32 size);
> void catpt_sram_free(struct resource *sram);
> struct resource *
> diff --git a/sound/soc/intel/catpt/device.c b/sound/soc/intel/catpt/device.c
> index 0d2dd919de8d..390ffb203de0 100644
> --- a/sound/soc/intel/catpt/device.c
> +++ b/sound/soc/intel/catpt/device.c
> @@ -342,6 +342,7 @@ static struct platform_driver catpt_acpi_driver = {
> .name = "intel_catpt",
> .acpi_match_table = catpt_ids,
> .pm = &catpt_dev_pm,
> + .dev_groups = catpt_attr_groups,
> },
> };
> module_platform_driver(catpt_acpi_driver);
> diff --git a/sound/soc/intel/catpt/sysfs.c b/sound/soc/intel/catpt/sysfs.c
> new file mode 100644
> index 000000000000..9579e233a15d
> --- /dev/null
> +++ b/sound/soc/intel/catpt/sysfs.c
> @@ -0,0 +1,55 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +//
> +// Copyright(c) 2020 Intel Corporation. All rights reserved.
> +//
> +// Author: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
> +//
> +
> +#include <linux/pm_runtime.h>
> +#include "core.h"
> +
> +static ssize_t fw_version_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct catpt_dev *cdev = dev_get_drvdata(dev);
> + struct catpt_fw_version version;
> + int ret;
> +
> + pm_runtime_get_sync(cdev->dev);
> +
> + ret = catpt_ipc_get_fw_version(cdev, &version);
> +
> + pm_runtime_mark_last_busy(cdev->dev);
> + pm_runtime_put_autosuspend(cdev->dev);
> +
> + if (ret)
> + return CATPT_IPC_ERROR(ret);
> +
> + return sprintf(buf, "%d.%d.%d.%d\n", version.type, version.major,
> + version.minor, version.build);
> +}
> +static DEVICE_ATTR_RO(fw_version);
> +
> +static ssize_t fw_info_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct catpt_dev *cdev = dev_get_drvdata(dev);
> +
> + return sprintf(buf, "%s\n", cdev->ipc.config.fw_info);
> +}
> +static DEVICE_ATTR_RO(fw_info);
> +
> +static struct attribute *catpt_attrs[] = {
> + &dev_attr_fw_version.attr,
> + &dev_attr_fw_info.attr,
> + NULL
> +};
> +
> +static const struct attribute_group catpt_attr_group = {
> + .attrs = catpt_attrs,
> +};
> +
> +const struct attribute_group *catpt_attr_groups[] = {
> + &catpt_attr_group,
> + NULL
> +};
> --
> 2.17.1
>
--
With Best Regards,
Andy Shevchenko
