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/* 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 */
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