| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-id: <1420735227-21091-2-git-send-email-k.wrona@samsung.com>
Date: Thu, 08 Jan 2015 17:40:26 +0100
From: Karol Wrona <k.wrona@...sung.com>
To: Jonathan Cameron <jic23@...nel.org>, linux-iio@...r.kernel.org,
Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald <pmeerw@...erw.net>,
linux-kernel@...r.kernel.org
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Karol Wrona <wrona.vy@...il.com>,
Karol Wrona <k.wrona@...sung.com>
Subject: [PATCH 1/2] iio: Add no-triggered buffer helper functions
These ones helps to create and manage iio_kfifo buffer when
no-triggered buffer is used.
Signed-off-by: Karol Wrona <k.wrona@...sung.com>
Suggested-by: Jonathan Cameron <jic23@...nel.org>
---
drivers/iio/Kconfig | 6 +++
drivers/iio/Makefile | 1 +
drivers/iio/industrialio-notriggered-buffer.c | 72 +++++++++++++++++++++++++
include/linux/iio/notriggered-buffer.h | 11 ++++
4 files changed, 90 insertions(+)
create mode 100644 drivers/iio/industrialio-notriggered-buffer.c
create mode 100644 include/linux/iio/notriggered-buffer.h
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 345395e..50f6599 100644
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -34,6 +34,12 @@ config IIO_KFIFO_BUF
no buffer events so it is up to userspace to work out how
often to read from the buffer.
+config IIO_NOTRIGGERED_BUFFER
+ tristate
+ select IIO_KFIFO_BUF
+ help
+ Provides helper functions for setting up no-triggered buffers.
+
config IIO_TRIGGERED_BUFFER
tristate
select IIO_TRIGGER
diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
index 698afc2..fff7b1a 100644
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -8,6 +8,7 @@ industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o
industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o
industrialio-$(CONFIG_IIO_BUFFER_CB) += buffer_cb.o
+obj-$(CONFIG_IIO_NOTRIGGERED_BUFFER) += industrialio-notriggered-buffer.o
obj-$(CONFIG_IIO_TRIGGERED_BUFFER) += industrialio-triggered-buffer.o
obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o
diff --git a/drivers/iio/industrialio-notriggered-buffer.c b/drivers/iio/industrialio-notriggered-buffer.c
new file mode 100644
index 0000000..3cbccab
--- /dev/null
+++ b/drivers/iio/industrialio-notriggered-buffer.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/kfifo_buf.h>
+
+/**
+ * iio_notriggered_buffer_setup() - Setup no-triggered buffer and pollfunc
+ * @indio_dev: IIO device structure
+ * @setup_ops: Buffer setup functions to use for this device.
+ *
+ * Usage: see iio_triggered_buffer_setup() comments.
+ *
+ * To free the resources allocated by this function call
+ * iio_notriggered_buffer_cleanup().
+ *
+ * Returns: 0 - success, < 0 failure
+ */
+int iio_notriggered_buffer_setup(struct iio_dev *indio_dev,
+ const struct iio_buffer_setup_ops *setup_ops)
+
+{
+ int ret;
+ struct iio_buffer *buffer;
+
+ buffer = iio_kfifo_allocate();
+ if (!buffer)
+ return -ENOMEM;
+
+ iio_device_attach_buffer(indio_dev, buffer);
+
+ indio_dev->setup_ops = setup_ops;
+
+ ret = iio_buffer_register(indio_dev, indio_dev->channels,
+ indio_dev->num_channels);
+ if (ret)
+ iio_kfifo_free(buffer);
+
+ return ret;
+}
+EXPORT_SYMBOL(iio_notriggered_buffer_setup);
+
+/**
+ * iio_notriggered_buffer_cleanup() - Free resources allocated by iio_notriggered_buffer_setup()
+ * @indio_dev: IIO device structure
+ */
+void iio_notriggered_buffer_cleanup(struct iio_dev *indio_dev)
+{
+ iio_buffer_unregister(indio_dev);
+ iio_kfifo_free(indio_dev->buffer);
+}
+EXPORT_SYMBOL(iio_notriggered_buffer_cleanup);
+
+MODULE_AUTHOR("Karol Wrona <k.wrona@...sung.com>");
+MODULE_DESCRIPTION("IIO helper functions for setting up no-triggered buffers");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/iio/notriggered-buffer.h b/include/linux/iio/notriggered-buffer.h
new file mode 100644
index 0000000..5b3e416
--- /dev/null
+++ b/include/linux/iio/notriggered-buffer.h
@@ -0,0 +1,11 @@
+#ifndef _LINUX_IIO_NOTRIGGERED_BUFFER_H_
+#define _LINUX_IIO_NOTRIGGERED_BUFFER_H_
+
+struct iio_dev;
+struct iio_buffer_setup_ops;
+
+int iio_notriggered_buffer_setup(struct iio_dev *indio_dev,
+ const struct iio_buffer_setup_ops *setup_ops);
+void iio_notriggered_buffer_cleanup(struct iio_dev *indio_dev);
+
+#endif /* _LINUX_IIO_NOTRIGGERED_BUFFER_H_ */
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists