1 files changed, 113 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_dsp_pool.h b/sound/soc/fsl/fsl_dsp_pool.h
new file mode 100644
index 000000000000..4a56262faf7f
--- /dev/null
+++ b/sound/soc/fsl/fsl_dsp_pool.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Xtensa buffer pool API header
+ *
+ * Copyright 2018 NXP
+ * Copyright (c) 2012-2013 by Tensilica Inc
+ */
+#ifndef FSL_DSP_POOL_H
+#define FSL_DSP_POOL_H
+
+#include <linux/types.h>
+#include "fsl_dsp_proxy.h"
+
+/* ...buffer pool type */
+typedef u32 xf_pool_type_t;
+
+/* ...previous declaration of struct */
+struct xf_buffer;
+struct xf_pool;
+struct xf_handle;
+struct xf_message;
+struct xf_client;
+
+/* ...response callback */
+typedef void (*xf_response_cb)(struct xf_handle *h, struct xf_message *msg);
+
+/* ...buffer pool type */
+enum xf_pool_type {
+        XF_POOL_AUX = 0,
+        XF_POOL_INPUT = 1,
+        XF_POOL_OUTPUT = 2
+};
+
+/* ...buffer link pointer */
+union xf_buffer_link {
+        /* ...pointer to next free buffer in a pool (for free buffer) */
+        struct xf_buffer *next;
+        /* ...reference to a buffer pool (for allocated buffer) */
+        struct xf_pool *pool;
+};
+
+/* ...buffer descriptor */
+struct xf_buffer {
+        /* ...virtual address of contiguous buffer */
+        void *address;
+        /* ...link pointer */
+        union xf_buffer_link link;
+};
+
+/* ...buffer pool */
+struct xf_pool {
+        /* ...reference to proxy data */
+        struct xf_proxy *proxy;
+        /* ...length of individual buffer in a pool */
+        u32 length;
+        /* ...number of buffers in a pool */
+        u32 number;
+        /* ...pointer to pool memory */
+        void *p;
+        /* ...pointer to first free buffer in a pool */
+        struct xf_buffer *free;
+        /* ...individual buffers */
+        struct xf_buffer buffer[0];
+};
+
+/* component handle */
+struct xf_handle {
+        /* ...reference to proxy data */
+        struct xf_proxy *proxy;
+        /* ...auxiliary control buffer for control transactions */
+        struct xf_buffer *aux;
+        /* ...global client-id of the component */
+        u32 id;
+        /* ...local client number (think about merging into "id" field - tbd) */
+        u32 client;
+        /* ...response processing hook */
+        xf_response_cb response;
+};
+
+/* ...accessor to buffer data */
+static inline void *xf_buffer_data(struct xf_buffer *buffer)
+{
+        return buffer->address;
+}
+
+/* ...length of buffer data */
+static inline size_t xf_buffer_length(struct xf_buffer *buffer)
+{
+        struct xf_pool *pool = buffer->link.pool;
+
+        return (size_t)pool->length;
+}
+
+/* ...component client-id (global scope) */
+static inline u32 xf_handle_id(struct xf_handle *handle)
+{
+        return handle->id;
+}
+
+/* ...pointer to auxiliary buffer */
+static inline void *xf_handle_aux(struct xf_handle *handle)
+{
+        return xf_buffer_data(handle->aux);
+}
+
+int xf_pool_alloc(struct xf_client *client, struct xf_proxy *proxy, u32 number,
+		  u32 length, xf_pool_type_t type, struct xf_pool **pool);
+int xf_pool_free(struct xf_client *client, struct xf_pool *pool);
+
+struct xf_buffer *xf_buffer_get(struct xf_pool *pool);
+void xf_buffer_put(struct xf_buffer *buffer);
+
+#endif /* FSL_DSP_POOL_H */