diff options
Diffstat (limited to 'drivers/media/video/samsung/mali/common/mali_kernel_descriptor_mapping.c')
| -rw-r--r-- | drivers/media/video/samsung/mali/common/mali_kernel_descriptor_mapping.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/drivers/media/video/samsung/mali/common/mali_kernel_descriptor_mapping.c b/drivers/media/video/samsung/mali/common/mali_kernel_descriptor_mapping.c deleted file mode 100644 index b9f05ca..0000000 --- a/drivers/media/video/samsung/mali/common/mali_kernel_descriptor_mapping.c +++ /dev/null @@ -1,184 +0,0 @@ -/* - * Copyright (C) 2010, 2012 ARM Limited. All rights reserved. - * - * This program is free software and is provided to you under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. - * - * A copy of the licence is included with the program, and can also be obtained from Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#include "mali_kernel_common.h" -#include "mali_kernel_descriptor_mapping.h" -#include "mali_osk.h" -#include "mali_osk_bitops.h" - -#define MALI_PAD_INT(x) (((x) + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1)) - -/** - * Allocate a descriptor table capable of holding 'count' mappings - * @param count Number of mappings in the table - * @return Pointer to a new table, NULL on error - */ -static mali_descriptor_table * descriptor_table_alloc(int count); - -/** - * Free a descriptor table - * @param table The table to free - */ -static void descriptor_table_free(mali_descriptor_table * table); - -mali_descriptor_mapping * mali_descriptor_mapping_create(int init_entries, int max_entries) -{ - mali_descriptor_mapping * map = _mali_osk_calloc(1, sizeof(mali_descriptor_mapping)); - - init_entries = MALI_PAD_INT(init_entries); - max_entries = MALI_PAD_INT(max_entries); - - if (NULL != map) - { - map->table = descriptor_table_alloc(init_entries); - if (NULL != map->table) - { - map->lock = _mali_osk_lock_init( (_mali_osk_lock_flags_t)(_MALI_OSK_LOCKFLAG_ORDERED | _MALI_OSK_LOCKFLAG_READERWRITER | _MALI_OSK_LOCKFLAG_NONINTERRUPTABLE), 0, _MALI_OSK_LOCK_ORDER_DESCRIPTOR_MAP); - if (NULL != map->lock) - { - _mali_osk_set_nonatomic_bit(0, map->table->usage); /* reserve bit 0 to prevent NULL/zero logic to kick in */ - map->max_nr_mappings_allowed = max_entries; - map->current_nr_mappings = init_entries; - return map; - } - descriptor_table_free(map->table); - } - _mali_osk_free(map); - } - return NULL; -} - -void mali_descriptor_mapping_destroy(mali_descriptor_mapping * map) -{ - descriptor_table_free(map->table); - _mali_osk_lock_term(map->lock); - _mali_osk_free(map); -} - -_mali_osk_errcode_t mali_descriptor_mapping_allocate_mapping(mali_descriptor_mapping * map, void * target, int *odescriptor) -{ - _mali_osk_errcode_t err = _MALI_OSK_ERR_FAULT; - int new_descriptor; - - MALI_DEBUG_ASSERT_POINTER(map); - MALI_DEBUG_ASSERT_POINTER(odescriptor); - - _mali_osk_lock_wait(map->lock, _MALI_OSK_LOCKMODE_RW); - new_descriptor = _mali_osk_find_first_zero_bit(map->table->usage, map->current_nr_mappings); - if (new_descriptor == map->current_nr_mappings) - { - /* no free descriptor, try to expand the table */ - mali_descriptor_table * new_table, * old_table; - if (map->current_nr_mappings >= map->max_nr_mappings_allowed) goto unlock_and_exit; - - map->current_nr_mappings += BITS_PER_LONG; - new_table = descriptor_table_alloc(map->current_nr_mappings); - if (NULL == new_table) goto unlock_and_exit; - - old_table = map->table; - _mali_osk_memcpy(new_table->usage, old_table->usage, (sizeof(unsigned long)*map->current_nr_mappings) / BITS_PER_LONG); - _mali_osk_memcpy(new_table->mappings, old_table->mappings, map->current_nr_mappings * sizeof(void*)); - map->table = new_table; - descriptor_table_free(old_table); - } - - /* we have found a valid descriptor, set the value and usage bit */ - _mali_osk_set_nonatomic_bit(new_descriptor, map->table->usage); - map->table->mappings[new_descriptor] = target; - *odescriptor = new_descriptor; - err = _MALI_OSK_ERR_OK; - -unlock_and_exit: - _mali_osk_lock_signal(map->lock, _MALI_OSK_LOCKMODE_RW); - MALI_ERROR(err); -} - -void mali_descriptor_mapping_call_for_each(mali_descriptor_mapping * map, void (*callback)(int, void*)) -{ - int i; - - MALI_DEBUG_ASSERT_POINTER(map); - MALI_DEBUG_ASSERT_POINTER(callback); - - _mali_osk_lock_wait(map->lock, _MALI_OSK_LOCKMODE_RO); - /* id 0 is skipped as it's an reserved ID not mapping to anything */ - for (i = 1; i < map->current_nr_mappings; ++i) - { - if (_mali_osk_test_bit(i, map->table->usage)) - { - callback(i, map->table->mappings[i]); - } - } - _mali_osk_lock_signal(map->lock, _MALI_OSK_LOCKMODE_RO); -} - -_mali_osk_errcode_t mali_descriptor_mapping_get(mali_descriptor_mapping * map, int descriptor, void** target) -{ - _mali_osk_errcode_t result = _MALI_OSK_ERR_FAULT; - MALI_DEBUG_ASSERT_POINTER(map); - _mali_osk_lock_wait(map->lock, _MALI_OSK_LOCKMODE_RO); - if ( (descriptor >= 0) && (descriptor < map->current_nr_mappings) && _mali_osk_test_bit(descriptor, map->table->usage) ) - { - *target = map->table->mappings[descriptor]; - result = _MALI_OSK_ERR_OK; - } - else *target = NULL; - _mali_osk_lock_signal(map->lock, _MALI_OSK_LOCKMODE_RO); - MALI_ERROR(result); -} - -_mali_osk_errcode_t mali_descriptor_mapping_set(mali_descriptor_mapping * map, int descriptor, void * target) -{ - _mali_osk_errcode_t result = _MALI_OSK_ERR_FAULT; - _mali_osk_lock_wait(map->lock, _MALI_OSK_LOCKMODE_RO); - if ( (descriptor >= 0) && (descriptor < map->current_nr_mappings) && _mali_osk_test_bit(descriptor, map->table->usage) ) - { - map->table->mappings[descriptor] = target; - result = _MALI_OSK_ERR_OK; - } - _mali_osk_lock_signal(map->lock, _MALI_OSK_LOCKMODE_RO); - MALI_ERROR(result); -} - -void *mali_descriptor_mapping_free(mali_descriptor_mapping * map, int descriptor) -{ - void *old_value = NULL; - - _mali_osk_lock_wait(map->lock, _MALI_OSK_LOCKMODE_RW); - if ( (descriptor >= 0) && (descriptor < map->current_nr_mappings) && _mali_osk_test_bit(descriptor, map->table->usage) ) - { - old_value = map->table->mappings[descriptor]; - map->table->mappings[descriptor] = NULL; - _mali_osk_clear_nonatomic_bit(descriptor, map->table->usage); - } - _mali_osk_lock_signal(map->lock, _MALI_OSK_LOCKMODE_RW); - - return old_value; -} - -static mali_descriptor_table * descriptor_table_alloc(int count) -{ - mali_descriptor_table * table; - - table = _mali_osk_calloc(1, sizeof(mali_descriptor_table) + ((sizeof(unsigned long) * count)/BITS_PER_LONG) + (sizeof(void*) * count)); - - if (NULL != table) - { - table->usage = (u32*)((u8*)table + sizeof(mali_descriptor_table)); - table->mappings = (void**)((u8*)table + sizeof(mali_descriptor_table) + ((sizeof(unsigned long) * count)/BITS_PER_LONG)); - } - - return table; -} - -static void descriptor_table_free(mali_descriptor_table * table) -{ - _mali_osk_free(table); -} |