184 lines
6.4 KiB
C
184 lines
6.4 KiB
C
/*
|
|
* Copyright (C) 2010-2011 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)
|
|
{
|
|
#if !USING_MMU
|
|
map->lock = _mali_osk_lock_init( (_mali_osk_lock_flags_t)(_MALI_OSK_LOCKFLAG_ORDERED | _MALI_OSK_LOCKFLAG_READERWRITER | _MALI_OSK_LOCKFLAG_NONINTERRUPTABLE), 0, 20);
|
|
#else
|
|
map->lock = _mali_osk_lock_init( (_mali_osk_lock_flags_t)(_MALI_OSK_LOCKFLAG_ORDERED | _MALI_OSK_LOCKFLAG_READERWRITER | _MALI_OSK_LOCKFLAG_NONINTERRUPTABLE), 0, 116);
|
|
#endif
|
|
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)
|
|
{
|
|
_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) )
|
|
{
|
|
map->table->mappings[descriptor] = NULL;
|
|
_mali_osk_clear_nonatomic_bit(descriptor, map->table->usage);
|
|
}
|
|
_mali_osk_lock_signal(map->lock, _MALI_OSK_LOCKMODE_RW);
|
|
}
|
|
|
|
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);
|
|
}
|