1 files changed, 412 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c
new file mode 100644
index 0000000..606376f
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/runtime/queue/src/queue.c
@@ -0,0 +1,412 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 "ia_css_queue.h"
+#include <math_support.h>
+#include <ia_css_circbuf.h>
+#include <ia_css_circbuf_desc.h>
+#include "queue_access.h"
+
+/*****************************************************************************
+ * Queue Public APIs
+ *****************************************************************************/
+int ia_css_queue_local_init(
+			ia_css_queue_t *qhandle,
+			ia_css_queue_local_t *desc)
+{
+	if (NULL == qhandle || NULL == desc
+		|| NULL == desc->cb_elems || NULL == desc->cb_desc) {
+		/* Invalid parameters, return error*/
+		return EINVAL;
+	}
+
+	/* Mark the queue as Local */
+	qhandle->type = IA_CSS_QUEUE_TYPE_LOCAL;
+
+	/* Create a local circular buffer queue*/
+	ia_css_circbuf_create(&qhandle->desc.cb_local,
+	      desc->cb_elems,
+	      desc->cb_desc);
+
+	return 0;
+}
+
+int ia_css_queue_remote_init(
+			ia_css_queue_t *qhandle,
+			ia_css_queue_remote_t *desc)
+{
+	if (NULL == qhandle || NULL == desc) {
+		/* Invalid parameters, return error*/
+		return EINVAL;
+	}
+
+	/* Mark the queue as remote*/
+	qhandle->type = IA_CSS_QUEUE_TYPE_REMOTE;
+
+	/* Copy over the local queue descriptor*/
+	qhandle->location = desc->location;
+	qhandle->proc_id = desc->proc_id;
+	qhandle->desc.remote.cb_desc_addr = desc->cb_desc_addr;
+	qhandle->desc.remote.cb_elems_addr = desc->cb_elems_addr;
+
+	/* If queue is remote, we let the local processor
+	 * do its init, before using it. This is just to get us
+	 * started, we can remove this restriction as we go ahead
+	 */
+
+	return 0;
+}
+
+int ia_css_queue_uninit(
+			ia_css_queue_t *qhandle)
+{
+	if (!qhandle)
+		return EINVAL;
+
+	/* Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Local queues are created. Destroy it*/
+		ia_css_circbuf_destroy(&qhandle->desc.cb_local);
+	}
+
+	return 0;
+}
+
+int ia_css_queue_enqueue(
+			ia_css_queue_t *qhandle,
+			uint32_t item)
+{
+	int error = 0;
+	if (NULL == qhandle)
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		if (ia_css_circbuf_is_full(&qhandle->desc.cb_local)) {
+			/* Cannot push the element. Return*/
+			return ENOBUFS;
+		}
+
+		/* Push the element*/
+		ia_css_circbuf_push(&qhandle->desc.cb_local, item);
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		ia_css_circbuf_desc_t cb_desc;
+		ia_css_circbuf_elem_t cb_elem;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG;
+
+		/* a. Load the queue cb_desc from remote */
+		QUEUE_CB_DESC_INIT(&cb_desc);
+		error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* b. Operate on the queue */
+		if (ia_css_circbuf_desc_is_full(&cb_desc))
+			return ENOBUFS;
+
+		cb_elem.val = item;
+
+		error = ia_css_queue_item_store(qhandle, cb_desc.end, &cb_elem);
+		if (error != 0)
+			return error;
+
+		cb_desc.end = (cb_desc.end + 1) % cb_desc.size;
+
+		/* c. Store the queue object */
+		/* Set only fields requiring update with
+		 * valid value. Avoids uncessary calls
+		 * to load/store functions
+		 */
+		ignore_desc_flags = QUEUE_IGNORE_SIZE_START_STEP_FLAGS;
+
+		error = ia_css_queue_store(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+	}
+
+	return 0;
+}
+
+int ia_css_queue_dequeue(
+			ia_css_queue_t *qhandle,
+			uint32_t *item)
+{
+	int error = 0;
+	if (qhandle == NULL || NULL == item)
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		if (ia_css_circbuf_is_empty(&qhandle->desc.cb_local)) {
+			/* Nothing to pop. Return empty queue*/
+			return ENODATA;
+		}
+
+		*item = ia_css_circbuf_pop(&qhandle->desc.cb_local);
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		/* a. Load the queue from remote */
+		ia_css_circbuf_desc_t cb_desc;
+		ia_css_circbuf_elem_t cb_elem;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG;
+
+		QUEUE_CB_DESC_INIT(&cb_desc);
+
+		error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* b. Operate on the queue */
+		if (ia_css_circbuf_desc_is_empty(&cb_desc))
+			return ENODATA;
+
+		error = ia_css_queue_item_load(qhandle, cb_desc.start, &cb_elem);
+		if (error != 0)
+			return error;
+
+		*item = cb_elem.val;
+
+		cb_desc.start = OP_std_modadd(cb_desc.start, 1, cb_desc.size);
+
+		/* c. Store the queue object */
+		/* Set only fields requiring update with
+		 * valid value. Avoids uncessary calls
+		 * to load/store functions
+		 */
+		ignore_desc_flags = QUEUE_IGNORE_SIZE_END_STEP_FLAGS;
+		error = ia_css_queue_store(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+	}
+	return 0;
+}
+
+int ia_css_queue_is_full(
+			ia_css_queue_t *qhandle,
+			bool *is_full)
+{
+	int error = 0;
+	if ((qhandle == NULL) || (is_full == NULL))
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		*is_full = ia_css_circbuf_is_full(&qhandle->desc.cb_local);
+		return 0;
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		/* a. Load the queue from remote */
+		ia_css_circbuf_desc_t cb_desc;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG;
+		QUEUE_CB_DESC_INIT(&cb_desc);
+		error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* b. Operate on the queue */
+		*is_full = ia_css_circbuf_desc_is_full(&cb_desc);
+		return 0;
+	}
+
+	return EINVAL;
+}
+
+int ia_css_queue_get_free_space(
+			ia_css_queue_t *qhandle,
+			uint32_t *size)
+{
+	int error = 0;
+	if ((qhandle == NULL) || (size == NULL))
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		*size = ia_css_circbuf_get_free_elems(&qhandle->desc.cb_local);
+		return 0;
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		/* a. Load the queue from remote */
+		ia_css_circbuf_desc_t cb_desc;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG;
+		QUEUE_CB_DESC_INIT(&cb_desc);
+		error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* b. Operate on the queue */
+		*size = ia_css_circbuf_desc_get_free_elems(&cb_desc);
+		return 0;
+	}
+
+	return EINVAL;
+}
+
+int ia_css_queue_get_used_space(
+			ia_css_queue_t *qhandle,
+			uint32_t *size)
+{
+	int error = 0;
+	if ((qhandle == NULL) || (size == NULL))
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		*size = ia_css_circbuf_get_num_elems(&qhandle->desc.cb_local);
+		return 0;
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		/* a. Load the queue from remote */
+		ia_css_circbuf_desc_t cb_desc;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG;
+		QUEUE_CB_DESC_INIT(&cb_desc);
+		error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* b. Operate on the queue */
+		*size = ia_css_circbuf_desc_get_num_elems(&cb_desc);
+		return 0;
+	}
+
+	return EINVAL;
+}
+
+int ia_css_queue_peek(
+		ia_css_queue_t *qhandle,
+		uint32_t offset,
+		uint32_t *element)
+{
+	uint32_t num_elems = 0;
+	int error = 0;
+
+	if ((qhandle == NULL) || (element == NULL))
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		/* Check if offset is valid */
+		num_elems = ia_css_circbuf_get_num_elems(&qhandle->desc.cb_local);
+		if (offset > num_elems)
+			return EINVAL;
+
+		*element = ia_css_circbuf_peek_from_start(&qhandle->desc.cb_local, (int) offset);
+		return 0;
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		/* a. Load the queue from remote */
+		ia_css_circbuf_desc_t cb_desc;
+		ia_css_circbuf_elem_t cb_elem;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG;
+
+		QUEUE_CB_DESC_INIT(&cb_desc);
+
+		error =  ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* Check if offset is valid */
+		num_elems = ia_css_circbuf_desc_get_num_elems(&cb_desc);
+		if (offset > num_elems)
+			return EINVAL;
+
+		offset = OP_std_modadd(cb_desc.start, offset, cb_desc.size);
+		error = ia_css_queue_item_load(qhandle, (uint8_t)offset, &cb_elem);
+		if (error != 0)
+			return error;
+
+		*element = cb_elem.val;
+		return 0;
+	}
+
+	return EINVAL;
+}
+
+int ia_css_queue_is_empty(
+			ia_css_queue_t *qhandle,
+			bool *is_empty)
+{
+	int error = 0;
+	if ((qhandle == NULL) || (is_empty == NULL))
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		*is_empty = ia_css_circbuf_is_empty(&qhandle->desc.cb_local);
+		return 0;
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		/* a. Load the queue from remote */
+		ia_css_circbuf_desc_t cb_desc;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_STEP_FLAG;
+
+		QUEUE_CB_DESC_INIT(&cb_desc);
+		error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* b. Operate on the queue */
+		*is_empty = ia_css_circbuf_desc_is_empty(&cb_desc);
+		return 0;
+	}
+
+	return EINVAL;
+}
+
+int ia_css_queue_get_size(
+			ia_css_queue_t *qhandle,
+			uint32_t *size)
+{
+	int error = 0;
+	if ((qhandle == NULL) || (size == NULL))
+		return EINVAL;
+
+	/* 1. Load the required queue object */
+	if (qhandle->type == IA_CSS_QUEUE_TYPE_LOCAL) {
+		/* Directly de-ref the object and
+		 * operate on the queue
+		 */
+		/* Return maximum usable capacity */
+		*size = ia_css_circbuf_get_size(&qhandle->desc.cb_local);
+	} else if (qhandle->type == IA_CSS_QUEUE_TYPE_REMOTE) {
+		/* a. Load the queue from remote */
+		ia_css_circbuf_desc_t cb_desc;
+		uint32_t ignore_desc_flags = QUEUE_IGNORE_START_END_STEP_FLAGS;
+
+		QUEUE_CB_DESC_INIT(&cb_desc);
+
+		error = ia_css_queue_load(qhandle, &cb_desc, ignore_desc_flags);
+		if (error != 0)
+			return error;
+
+		/* Return maximum usable capacity */
+		*size = cb_desc.size;
+	}
+
+	return 0;
+}