3 * Support for Intel Camera Imaging ISP subsystem.
4 * Copyright (c) 2015, Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * Support for Intel Camera Imaging ISP subsystem.
18 * Copyright (c) 2010 - 2015, Intel Corporation.
20 * This program is free software; you can redistribute it and/or modify it
21 * under the terms and conditions of the GNU General Public License,
22 * version 2, as published by the Free Software Foundation.
24 * This program is distributed in the hope it will be useful, but WITHOUT
25 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
26 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
31 #include "system_global.h"
33 #ifdef USE_INPUT_SYSTEM_VERSION_2401
35 #include "assert_support.h"
36 #include "platform_support.h"
37 #include "ia_css_isys.h"
38 #include "ibuf_ctrl_rmgr.h"
40 static ibuf_rsrc_t ibuf_rsrc;
42 static ibuf_handle_t *getHandle(uint16_t index)
44 ibuf_handle_t *handle = NULL;
46 if (index < MAX_IBUF_HANDLES)
47 handle = &ibuf_rsrc.handles[index];
51 void ia_css_isys_ibuf_rmgr_init(void)
53 memset(&ibuf_rsrc, 0, sizeof(ibuf_rsrc));
54 ibuf_rsrc.free_size = MAX_INPUT_BUFFER_SIZE;
57 void ia_css_isys_ibuf_rmgr_uninit(void)
59 memset(&ibuf_rsrc, 0, sizeof(ibuf_rsrc));
60 ibuf_rsrc.free_size = MAX_INPUT_BUFFER_SIZE;
63 bool ia_css_isys_ibuf_rmgr_acquire(
68 bool input_buffer_found = false;
69 uint32_t aligned_size;
70 ibuf_handle_t *handle = NULL;
73 assert(start_addr != NULL);
76 aligned_size = (size + (IBUF_ALIGN - 1)) & ~(IBUF_ALIGN - 1);
78 /* Check if there is an available un-used handle with the size
79 * that will fulfill the request.
81 if (ibuf_rsrc.num_active < ibuf_rsrc.num_allocated) {
82 for (i = 0; i < ibuf_rsrc.num_allocated; i++) {
83 handle = getHandle(i);
84 if (!handle->active) {
85 if (handle->size >= aligned_size) {
86 handle->active = true;
87 input_buffer_found = true;
88 ibuf_rsrc.num_active++;
95 if (!input_buffer_found) {
96 /* There were no available handles that fulfilled the
97 * request. Allocate a new handle with the requested size.
99 if ((ibuf_rsrc.num_allocated < MAX_IBUF_HANDLES) &&
100 (ibuf_rsrc.free_size >= aligned_size)) {
101 handle = getHandle(ibuf_rsrc.num_allocated);
102 handle->start_addr = ibuf_rsrc.free_start_addr;
103 handle->size = aligned_size;
104 handle->active = true;
106 ibuf_rsrc.free_start_addr += aligned_size;
107 ibuf_rsrc.free_size -= aligned_size;
108 ibuf_rsrc.num_active++;
109 ibuf_rsrc.num_allocated++;
111 input_buffer_found = true;
115 if (input_buffer_found && handle) {
116 *start_addr = handle->start_addr;
123 void ia_css_isys_ibuf_rmgr_release(
124 uint32_t *start_addr)
127 ibuf_handle_t *handle = NULL;
129 assert(start_addr != NULL);
131 for (i = 0; i < ibuf_rsrc.num_allocated; i++) {
132 handle = getHandle(i);
133 if (handle->active && handle->start_addr == *start_addr) {
134 handle->active = false;
135 ibuf_rsrc.num_active--;