49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
|
|
* Copyright (c) 2015, Xilinx Inc. and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
/*
|
|
* @file generic/shmem.c
|
|
* @brief Generic libmetal shared memory handling.
|
|
*/
|
|
|
|
#include <metal/errno.h>
|
|
#include <metal/assert.h>
|
|
#include <metal/shmem.h>
|
|
#include <metal/sys.h>
|
|
#include <metal/utilities.h>
|
|
|
|
int metal_shmem_register_generic(struct metal_generic_shmem *shmem)
|
|
{
|
|
/* Make sure that we can be found. */
|
|
metal_assert(shmem->name && strlen(shmem->name) != 0);
|
|
|
|
/* Statically registered shmem regions cannot have a destructor. */
|
|
metal_assert(!shmem->io.ops.close);
|
|
|
|
metal_list_add_tail(&_metal.common.generic_shmem_list,
|
|
&shmem->node);
|
|
return 0;
|
|
}
|
|
|
|
int metal_shmem_open_generic(const char *name, size_t size,
|
|
struct metal_io_region **result)
|
|
{
|
|
struct metal_generic_shmem *shmem;
|
|
struct metal_list *node;
|
|
|
|
metal_list_for_each(&_metal.common.generic_shmem_list, node) {
|
|
shmem = metal_container_of(node, struct metal_generic_shmem, node);
|
|
if (strcmp(shmem->name, name) != 0)
|
|
continue;
|
|
if (size > metal_io_region_size(&shmem->io))
|
|
continue;
|
|
*result = &shmem->io;
|
|
return 0;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|