2 * Copyright (C) 2010, 2012-2014 ARM Limited. All rights reserved.
4 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
5 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
7 * A copy of the licence is included with the program, and can also be obtained from Free Software
8 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
11 #include "mali_kernel_common.h"
12 #include "mali_kernel_descriptor_mapping.h"
14 #include "mali_osk_bitops.h"
15 #include "mali_memory_types.h"
16 #include "mali_session.h"
18 #define MALI_PAD_INT(x) (((x) + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1))
21 * Allocate a descriptor table capable of holding 'count' mappings
22 * @param count Number of mappings in the table
23 * @return Pointer to a new table, NULL on error
25 static mali_descriptor_table *descriptor_table_alloc(int count);
28 * Free a descriptor table
29 * @param table The table to free
31 static void descriptor_table_free(mali_descriptor_table *table);
33 mali_descriptor_mapping *mali_descriptor_mapping_create(int init_entries, int max_entries)
35 mali_descriptor_mapping *map = _mali_osk_calloc(1, sizeof(mali_descriptor_mapping));
37 init_entries = MALI_PAD_INT(init_entries);
38 max_entries = MALI_PAD_INT(max_entries);
41 map->table = descriptor_table_alloc(init_entries);
42 if (NULL != map->table) {
43 map->lock = _mali_osk_mutex_rw_init(_MALI_OSK_LOCKFLAG_ORDERED, _MALI_OSK_LOCK_ORDER_DESCRIPTOR_MAP);
44 if (NULL != map->lock) {
45 _mali_osk_set_nonatomic_bit(0, map->table->usage); /* reserve bit 0 to prevent NULL/zero logic to kick in */
46 map->max_nr_mappings_allowed = max_entries;
47 map->current_nr_mappings = init_entries;
50 descriptor_table_free(map->table);
57 void mali_descriptor_mapping_destroy(mali_descriptor_mapping *map)
59 descriptor_table_free(map->table);
60 _mali_osk_mutex_rw_term(map->lock);
64 _mali_osk_errcode_t mali_descriptor_mapping_allocate_mapping(mali_descriptor_mapping *map, void *target, int *odescriptor)
66 _mali_osk_errcode_t err = _MALI_OSK_ERR_FAULT;
68 mali_mem_allocation *descriptor;
69 struct mali_session_data *session;
71 MALI_DEBUG_ASSERT_POINTER(map);
72 MALI_DEBUG_ASSERT_POINTER(odescriptor);
73 MALI_DEBUG_ASSERT_POINTER(target);
75 _mali_osk_mutex_rw_wait(map->lock, _MALI_OSK_LOCKMODE_RW);
76 new_descriptor = _mali_osk_find_first_zero_bit(map->table->usage, map->current_nr_mappings);
77 if (new_descriptor == map->current_nr_mappings) {
78 /* no free descriptor, try to expand the table */
79 mali_descriptor_table *new_table, * old_table;
80 if (map->current_nr_mappings >= map->max_nr_mappings_allowed) goto unlock_and_exit;
82 map->current_nr_mappings += BITS_PER_LONG;
83 new_table = descriptor_table_alloc(map->current_nr_mappings);
84 if (NULL == new_table) goto unlock_and_exit;
86 old_table = map->table;
87 _mali_osk_memcpy(new_table->usage, old_table->usage, (sizeof(unsigned long)*map->current_nr_mappings) / BITS_PER_LONG);
88 _mali_osk_memcpy(new_table->mappings, old_table->mappings, map->current_nr_mappings * sizeof(void *));
89 map->table = new_table;
90 descriptor_table_free(old_table);
93 /* we have found a valid descriptor, set the value and usage bit */
94 _mali_osk_set_nonatomic_bit(new_descriptor, map->table->usage);
95 map->table->mappings[new_descriptor] = target;
96 *odescriptor = new_descriptor;
98 /* To calculate the mali mem usage for the session */
99 descriptor = (mali_mem_allocation *)target;
100 session = descriptor->session;
102 MALI_DEBUG_ASSERT_POINTER(session);
104 session->mali_mem_array[descriptor->type] += descriptor->size;
105 if ((MALI_MEM_OS == descriptor->type || MALI_MEM_BLOCK == descriptor->type) &&
106 (session->mali_mem_array[MALI_MEM_OS] + session->mali_mem_array[MALI_MEM_BLOCK] > session->max_mali_mem_allocated)) {
107 session->max_mali_mem_allocated = session->mali_mem_array[MALI_MEM_OS] + session->mali_mem_array[MALI_MEM_BLOCK];
109 err = _MALI_OSK_ERR_OK;
112 _mali_osk_mutex_rw_signal(map->lock, _MALI_OSK_LOCKMODE_RW);
116 void mali_descriptor_mapping_call_for_each(mali_descriptor_mapping *map, void (*callback)(int, void *))
120 MALI_DEBUG_ASSERT_POINTER(map);
121 MALI_DEBUG_ASSERT_POINTER(callback);
123 _mali_osk_mutex_rw_wait(map->lock, _MALI_OSK_LOCKMODE_RO);
124 /* id 0 is skipped as it's an reserved ID not mapping to anything */
125 for (i = 1; i < map->current_nr_mappings; ++i) {
126 if (_mali_osk_test_bit(i, map->table->usage)) {
127 callback(i, map->table->mappings[i]);
130 _mali_osk_mutex_rw_signal(map->lock, _MALI_OSK_LOCKMODE_RO);
133 _mali_osk_errcode_t mali_descriptor_mapping_get(mali_descriptor_mapping *map, int descriptor, void **target)
135 _mali_osk_errcode_t result = _MALI_OSK_ERR_FAULT;
136 MALI_DEBUG_ASSERT_POINTER(map);
137 _mali_osk_mutex_rw_wait(map->lock, _MALI_OSK_LOCKMODE_RO);
138 if ((descriptor >= 0) && (descriptor < map->current_nr_mappings) && _mali_osk_test_bit(descriptor, map->table->usage)) {
139 *target = map->table->mappings[descriptor];
140 result = _MALI_OSK_ERR_OK;
141 } else *target = NULL;
142 _mali_osk_mutex_rw_signal(map->lock, _MALI_OSK_LOCKMODE_RO);
146 _mali_osk_errcode_t mali_descriptor_mapping_set(mali_descriptor_mapping *map, int descriptor, void *target)
148 _mali_osk_errcode_t result = _MALI_OSK_ERR_FAULT;
149 _mali_osk_mutex_rw_wait(map->lock, _MALI_OSK_LOCKMODE_RO);
150 if ((descriptor >= 0) && (descriptor < map->current_nr_mappings) && _mali_osk_test_bit(descriptor, map->table->usage)) {
151 map->table->mappings[descriptor] = target;
152 result = _MALI_OSK_ERR_OK;
154 _mali_osk_mutex_rw_signal(map->lock, _MALI_OSK_LOCKMODE_RO);
158 void *mali_descriptor_mapping_free(mali_descriptor_mapping *map, int descriptor)
160 void *old_value = NULL;
161 mali_mem_allocation *tmp_descriptor;
162 struct mali_session_data *session;
164 _mali_osk_mutex_rw_wait(map->lock, _MALI_OSK_LOCKMODE_RW);
165 if ((descriptor >= 0) && (descriptor < map->current_nr_mappings) && _mali_osk_test_bit(descriptor, map->table->usage)) {
166 old_value = map->table->mappings[descriptor];
167 map->table->mappings[descriptor] = NULL;
168 _mali_osk_clear_nonatomic_bit(descriptor, map->table->usage);
170 if (NULL != old_value) {
171 tmp_descriptor = (mali_mem_allocation *)old_value;
172 session = tmp_descriptor->session;
174 MALI_DEBUG_ASSERT_POINTER(session);
176 MALI_DEBUG_ASSERT(session->mali_mem_array[tmp_descriptor->type] >= tmp_descriptor->size);
178 session->mali_mem_array[tmp_descriptor->type] -= tmp_descriptor->size;
180 _mali_osk_mutex_rw_signal(map->lock, _MALI_OSK_LOCKMODE_RW);
185 static mali_descriptor_table *descriptor_table_alloc(int count)
187 mali_descriptor_table *table;
189 table = _mali_osk_calloc(1, sizeof(mali_descriptor_table) + ((sizeof(unsigned long) * count) / BITS_PER_LONG) + (sizeof(void *) * count));
192 table->usage = (u32 *)((u8 *)table + sizeof(mali_descriptor_table));
193 table->mappings = (void **)((u8 *)table + sizeof(mali_descriptor_table) + ((sizeof(unsigned long) * count) / BITS_PER_LONG));
199 static void descriptor_table_free(mali_descriptor_table *table)
201 _mali_osk_free(table);