qca-wifi: Add RelayFS framework wrappers support

Add RealyFS framework wrappers support to transfer large amount
of data between kernel space and user space.

Change-Id: Ic88848b003a2fc2c216b74a185f6bd46d5ddd1cd
CRs-Fixed: 2327607

qal/inc/qal_streamfs.h

@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: qal_streamfs
+ * Qualcomm abstraction layer (QAL) stream file system APIs
+ */
+
+#if !defined(__QAL_STREAMFS_H)
+#define _QAL_STREAMFS_H
+
+/* Include Files */
+#include <qdf_types.h>
+
+struct qal_streamfs_chan;
+struct qal_dentry_t;
+struct qal_streamfs_chan_callbacks;
+struct qal_streamfs_chan_buf;
+
+/**
+ * qal_streamfs_open() - Create streamfs channel for data trasfer
+ *  @base_filename: base name of files to create, %NULL for buffering only
+ *  @parent: dentry of parent directory, %NULL for root directory
+ *  @subbuf_size: size of sub-buffers
+ *  @n_subbufs: number of sub-buffers
+ *  @cb: streamfs channel callback functions
+ *  @private_data: user-defined data
+ *
+ *  Returns channel pointer if successful, %NULL otherwise.
+ */
+struct qal_streamfs_chan *
+qal_streamfs_open(const char *base_filename,
+				  struct qal_dentry_t *parent,
+				  size_t subbuf_size, size_t n_subbufs,
+				  struct qal_streamfs_chan_callbacks *cb,
+				  void *private_data);
+
+/**
+ * qal_streamfs_close() - Closes all channel buffers and frees the channel.
+ *  @chan: pointer to qal_streamfs_chan.
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_close(struct qal_streamfs_chan *chan);
+
+/**
+ * qal_streamfs_flush() - Flushes all channel buffers.
+ *  @chan: pointer to qal_streamfs_chan.
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_flush(struct qal_streamfs_chan *chan);
+
+/**
+ *  qal_streamfs_reset - reset streamfs channel
+ *  This erases data from all channel buffers and restarting the channel
+ *  in its initial state.
+ *  The buffers are not freed, so any mappings are still in effect.
+ *  @chan: pointer to qal_streamfs_chan.
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_reset(struct qal_streamfs_chan *chan);
+
+/**
+ *  qal_streamfs_subbufs_consumed - update the buffer's sub-buffers-consumed
+ *  count
+ *  @chan: pointer to qal_streamfs_chan.
+ *  @cpu: the cpu associated with the channel buffer to update
+ *  @subbufs_consumed: number of sub-buffers to add to current buf's count
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_subbufs_consumed(struct qal_streamfs_chan *chan,
+								   unsigned int cpu,
+								   size_t consumed);
+
+/**
+ *  qal_streamfs_write - write data into the channel
+ *  @chan: relay channel
+ *  @data: data to be written
+ *  @length: number of bytes to write
+ *
+ *  Writes data into the current cpu's channel buffer.
+ */
+inline void qal_streamfs_write(struct qal_streamfs_chan *chan,
+							   const void *data,
+							   size_t length);
+
+/**
+ *  qal_streamfs_buf_full - boolean, is the channel buffer full?
+ *  @buf: channel buffer
+ *
+ *  Returns 1 if the buffer is full, 0 otherwise.
+ */
+int qal_streamfs_buf_full(struct qal_streamfs_chan_buf *buf);
+
+#endif

qal/linux/src/qal_streamfs.c

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: qal_streamfs
+ * This file provides OS dependent stream filesystem APIs
+ */
+#include <qdf_module.h>
+#include <qal_streamfs.h>
+#include <relay.h>
+
+/**
+ * qal_streamfs_open() - Create streamfs channel for data trasfer
+ *  @base_filename: base name of files to create, %NULL for buffering only
+ *  @parent: dentry of parent directory, %NULL for root directory
+ *  @subbuf_size: size of sub-buffers
+ *  @n_subbufs: number of sub-buffers
+ *  @cb: streamfs channel callback functions
+ *  @private_data: user-defined data
+ *
+ *  Returns channel pointer if successful, %NULL otherwise.
+ */
+struct qal_streamfs_chan *
+qal_streamfs_open(const char *base_filename,
+				  struct qal_dentry_t *parent,
+				  size_t subbuf_size, size_t n_subbufs,
+				  struct qal_streamfs_chan_callbacks *cb,
+				  void *private_data)
+{
+	struct rchan *channel_ptr = NULL;
+
+	channel_ptr = relay_open(base_filename, (struct dentry *)parent,
+							 subbuf_size, n_subbufs,
+							(struct rchan_callbacks *)cb, private_data);
+
+	return (struct qal_streamfs_chan *)channel_ptr;
+}
+
+qdf_export_symbol(qal_streamfs_open);
+
+/**
+ * qal_streamfs_close() - Closes all channel buffers and frees the channel.
+ *  @chan: pointer to qal_streamfs_chan.
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_close(struct qal_streamfs_chan *chan)
+{
+	if (chan)
+		relay_close((struct rchan *)chan);
+}
+
+qdf_export_symbol(qal_streamfs_close);
+
+/**
+ * qal_streamfs_flush() - Flushes all channel buffers.
+ *  @chan: pointer to qal_streamfs_chan.
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_flush(struct qal_streamfs_chan *chan)
+{
+	if (chan)
+		relay_flush((struct rchan *)chan);
+}
+
+qdf_export_symbol(qal_streamfs_flush);
+
+/**
+ *  qal_streamfs_reset - reset streamfs channel
+ *  This erases data from all channel buffers and restarting the channel
+ *  in its initial state.
+ *  The buffers are not freed, so any mappings are still in effect.
+ *  @chan: pointer to qal_streamfs_chan.
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_reset(struct qal_streamfs_chan *chan)
+{
+	if (chan)
+		relay_reset((struct rchan *)chan);
+}
+
+qdf_export_symbol(qal_streamfs_reset);
+
+/**
+ *  qal_streamfs_subbufs_consumed - update the buffer's sub-buffers-consumed
+ *  count
+ *  @chan: pointer to qal_streamfs_chan.
+ *  @cpu: the cpu associated with the channel buffer to update
+ *  @subbufs_consumed: number of sub-buffers to add to current buf's count
+ *
+ *  Returns NONE
+ */
+void qal_streamfs_subbufs_consumed(struct qal_streamfs_chan *chan,
+		unsigned int cpu,
+		size_t consumed)
+{
+	if (chan)
+		relay_subbufs_consumed((struct rchan *)chan, cpu, consumed);
+}
+
+qdf_export_symbol(qal_streamfs_subbufs_consumed);
+
+/**
+ *  qal_streamfs_write - write data into the channel
+ *  @chan: relay channel
+ *  @data: data to be written
+ *  @length: number of bytes to write
+ *
+ *  Writes data into the current cpu's channel buffer.
+ */
+inline void qal_streamfs_write(struct qal_streamfs_chan *chan,
+		const void *data,
+		size_t length)
+{
+	if (chan)
+		relay_write((struct rchan *)chan, data, length);
+}
+
+qdf_export_symbol(qal_streamfs_write);
+
+/**
+ *  qal_streamfs_buf_full - boolean, is the channel buffer full?
+ *  @buf: channel buffer
+ *
+ *  Returns 1 if the buffer is full, 0 otherwise.
+ */
+int qal_streamfs_buf_full(struct qal_streamfs_chan_buf *buf)
+{
+	return relay_buf_full((struct rchan_buf *)buf);
+}
+
+qdf_export_symbol(qal_streamfs_buf_full);