371 lines
11 KiB
C
371 lines
11 KiB
C
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/*
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* Copyright (C) 2010-2011 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained from Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "mali_kernel_common.h"
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#include "mali_kernel_core.h"
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#include "mali_kernel_memory_engine.h"
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#include "mali_block_allocator.h"
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#include "mali_osk.h"
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#define MALI_BLOCK_SIZE (256UL * 1024UL) /* 256 kB, remember to keep the ()s */
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typedef struct block_info
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{
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struct block_info * next;
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} block_info;
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/* The structure used as the handle produced by block_allocator_allocate,
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* and removed by block_allocator_release */
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typedef struct block_allocator_allocation
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{
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/* The list will be released in reverse order */
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block_info *last_allocated;
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mali_allocation_engine * engine;
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mali_memory_allocation * descriptor;
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u32 start_offset;
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u32 mapping_length;
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} block_allocator_allocation;
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typedef struct block_allocator
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{
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_mali_osk_lock_t *mutex;
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block_info * all_blocks;
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block_info * first_free;
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u32 base;
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u32 cpu_usage_adjust;
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u32 num_blocks;
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} block_allocator;
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MALI_STATIC_INLINE u32 get_phys(block_allocator * info, block_info * block);
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static mali_physical_memory_allocation_result block_allocator_allocate(void* ctx, mali_allocation_engine * engine, mali_memory_allocation * descriptor, u32* offset, mali_physical_memory_allocation * alloc_info);
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static void block_allocator_release(void * ctx, void * handle);
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static mali_physical_memory_allocation_result block_allocator_allocate_page_table_block(void * ctx, mali_page_table_block * block);
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static void block_allocator_release_page_table_block( mali_page_table_block *page_table_block );
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static void block_allocator_destroy(mali_physical_memory_allocator * allocator);
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mali_physical_memory_allocator * mali_block_allocator_create(u32 base_address, u32 cpu_usage_adjust, u32 size, const char *name)
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{
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mali_physical_memory_allocator * allocator;
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block_allocator * info;
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u32 usable_size;
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u32 num_blocks;
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usable_size = size & ~(MALI_BLOCK_SIZE - 1);
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MALI_DEBUG_PRINT(3, ("Mali block allocator create for region starting at 0x%08X length 0x%08X\n", base_address, size));
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MALI_DEBUG_PRINT(4, ("%d usable bytes\n", usable_size));
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num_blocks = usable_size / MALI_BLOCK_SIZE;
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MALI_DEBUG_PRINT(4, ("which becomes %d blocks\n", num_blocks));
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if (usable_size == 0)
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{
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MALI_DEBUG_PRINT(1, ("Memory block of size %d is unusable\n", size));
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return NULL;
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}
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allocator = _mali_osk_malloc(sizeof(mali_physical_memory_allocator));
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if (NULL != allocator)
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{
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info = _mali_osk_malloc(sizeof(block_allocator));
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if (NULL != info)
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{
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info->mutex = _mali_osk_lock_init( _MALI_OSK_LOCKFLAG_ORDERED, 0, 105);
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if (NULL != info->mutex)
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{
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info->all_blocks = _mali_osk_malloc(sizeof(block_info) * num_blocks);
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if (NULL != info->all_blocks)
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{
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u32 i;
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info->first_free = NULL;
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info->num_blocks = num_blocks;
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info->base = base_address;
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info->cpu_usage_adjust = cpu_usage_adjust;
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for ( i = 0; i < num_blocks; i++)
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{
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info->all_blocks[i].next = info->first_free;
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info->first_free = &info->all_blocks[i];
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}
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allocator->allocate = block_allocator_allocate;
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allocator->allocate_page_table_block = block_allocator_allocate_page_table_block;
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allocator->destroy = block_allocator_destroy;
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allocator->ctx = info;
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allocator->name = name;
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return allocator;
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}
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_mali_osk_lock_term(info->mutex);
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}
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_mali_osk_free(info);
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}
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_mali_osk_free(allocator);
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}
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return NULL;
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}
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static void block_allocator_destroy(mali_physical_memory_allocator * allocator)
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{
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block_allocator * info;
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MALI_DEBUG_ASSERT_POINTER(allocator);
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MALI_DEBUG_ASSERT_POINTER(allocator->ctx);
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info = (block_allocator*)allocator->ctx;
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_mali_osk_free(info->all_blocks);
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_mali_osk_lock_term(info->mutex);
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_mali_osk_free(info);
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_mali_osk_free(allocator);
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}
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MALI_STATIC_INLINE u32 get_phys(block_allocator * info, block_info * block)
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{
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return info->base + ((block - info->all_blocks) * MALI_BLOCK_SIZE);
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}
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static mali_physical_memory_allocation_result block_allocator_allocate(void* ctx, mali_allocation_engine * engine, mali_memory_allocation * descriptor, u32* offset, mali_physical_memory_allocation * alloc_info)
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{
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block_allocator * info;
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u32 left;
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block_info * last_allocated = NULL;
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mali_physical_memory_allocation_result result = MALI_MEM_ALLOC_NONE;
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block_allocator_allocation *ret_allocation;
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MALI_DEBUG_ASSERT_POINTER(ctx);
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MALI_DEBUG_ASSERT_POINTER(descriptor);
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MALI_DEBUG_ASSERT_POINTER(offset);
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MALI_DEBUG_ASSERT_POINTER(alloc_info);
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info = (block_allocator*)ctx;
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left = descriptor->size - *offset;
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MALI_DEBUG_ASSERT(0 != left);
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if (_MALI_OSK_ERR_OK != _mali_osk_lock_wait(info->mutex, _MALI_OSK_LOCKMODE_RW)) return MALI_MEM_ALLOC_INTERNAL_FAILURE;
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ret_allocation = _mali_osk_malloc( sizeof(block_allocator_allocation) );
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if ( NULL == ret_allocation )
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{
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/* Failure; try another allocator by returning MALI_MEM_ALLOC_NONE */
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_mali_osk_lock_signal(info->mutex, _MALI_OSK_LOCKMODE_RW);
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return result;
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}
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ret_allocation->start_offset = *offset;
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ret_allocation->mapping_length = 0;
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while ((left > 0) && (info->first_free))
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{
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block_info * block;
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u32 phys_addr;
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u32 padding;
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u32 current_mapping_size;
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block = info->first_free;
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info->first_free = info->first_free->next;
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block->next = last_allocated;
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last_allocated = block;
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phys_addr = get_phys(info, block);
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padding = *offset & (MALI_BLOCK_SIZE-1);
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if (MALI_BLOCK_SIZE - padding < left)
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{
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current_mapping_size = MALI_BLOCK_SIZE - padding;
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}
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else
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{
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current_mapping_size = left;
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}
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if (_MALI_OSK_ERR_OK != mali_allocation_engine_map_physical(engine, descriptor, *offset, phys_addr + padding, info->cpu_usage_adjust, current_mapping_size))
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{
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MALI_DEBUG_PRINT(1, ("Mapping of physical memory failed\n"));
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result = MALI_MEM_ALLOC_INTERNAL_FAILURE;
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mali_allocation_engine_unmap_physical(engine, descriptor, ret_allocation->start_offset, ret_allocation->mapping_length, (_mali_osk_mem_mapregion_flags_t)0);
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/* release all memory back to the pool */
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while (last_allocated)
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{
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/* This relinks every block we've just allocated back into the free-list */
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block = last_allocated->next;
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last_allocated->next = info->first_free;
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info->first_free = last_allocated;
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last_allocated = block;
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}
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break;
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}
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*offset += current_mapping_size;
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left -= current_mapping_size;
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ret_allocation->mapping_length += current_mapping_size;
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}
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_mali_osk_lock_signal(info->mutex, _MALI_OSK_LOCKMODE_RW);
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if (last_allocated)
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{
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if (left) result = MALI_MEM_ALLOC_PARTIAL;
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else result = MALI_MEM_ALLOC_FINISHED;
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/* Record all the information about this allocation */
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ret_allocation->last_allocated = last_allocated;
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ret_allocation->engine = engine;
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ret_allocation->descriptor = descriptor;
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alloc_info->ctx = info;
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alloc_info->handle = ret_allocation;
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alloc_info->release = block_allocator_release;
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}
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else
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{
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/* Free the allocation information - nothing to be passed back */
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_mali_osk_free( ret_allocation );
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}
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return result;
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}
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static void block_allocator_release(void * ctx, void * handle)
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{
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block_allocator * info;
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block_info * block, * next;
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block_allocator_allocation *allocation;
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MALI_DEBUG_ASSERT_POINTER(ctx);
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MALI_DEBUG_ASSERT_POINTER(handle);
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info = (block_allocator*)ctx;
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allocation = (block_allocator_allocation*)handle;
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block = allocation->last_allocated;
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MALI_DEBUG_ASSERT_POINTER(block);
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if (_MALI_OSK_ERR_OK != _mali_osk_lock_wait(info->mutex, _MALI_OSK_LOCKMODE_RW))
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{
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MALI_DEBUG_PRINT(1, ("allocator release: Failed to get mutex\n"));
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return;
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}
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/* unmap */
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mali_allocation_engine_unmap_physical(allocation->engine, allocation->descriptor, allocation->start_offset, allocation->mapping_length, (_mali_osk_mem_mapregion_flags_t)0);
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while (block)
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{
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MALI_DEBUG_ASSERT(!((block < info->all_blocks) || (block > (info->all_blocks + info->num_blocks))));
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next = block->next;
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/* relink into free-list */
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block->next = info->first_free;
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info->first_free = block;
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/* advance the loop */
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block = next;
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}
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_mali_osk_lock_signal(info->mutex, _MALI_OSK_LOCKMODE_RW);
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_mali_osk_free( allocation );}
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static mali_physical_memory_allocation_result block_allocator_allocate_page_table_block(void * ctx, mali_page_table_block * block)
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{
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block_allocator * info;
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mali_physical_memory_allocation_result result = MALI_MEM_ALLOC_INTERNAL_FAILURE;
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MALI_DEBUG_ASSERT_POINTER(ctx);
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MALI_DEBUG_ASSERT_POINTER(block);
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info = (block_allocator*)ctx;
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if (_MALI_OSK_ERR_OK != _mali_osk_lock_wait(info->mutex, _MALI_OSK_LOCKMODE_RW)) return MALI_MEM_ALLOC_INTERNAL_FAILURE;
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if (NULL != info->first_free)
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{
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void * virt;
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u32 phys;
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u32 size;
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block_info * alloc;
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alloc = info->first_free;
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phys = get_phys(info, alloc); /* Does not modify info or alloc */
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size = MALI_BLOCK_SIZE; /* Must be multiple of MALI_MMU_PAGE_SIZE */
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virt = _mali_osk_mem_mapioregion( phys, size, "Mali block allocator page tables" );
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/* Failure of _mali_osk_mem_mapioregion will result in MALI_MEM_ALLOC_INTERNAL_FAILURE,
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* because it's unlikely another allocator will be able to map in. */
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if ( NULL != virt )
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{
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block->ctx = info; /* same as incoming ctx */
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block->handle = alloc;
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block->phys_base = phys;
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block->size = size;
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block->release = block_allocator_release_page_table_block;
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block->mapping = virt;
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info->first_free = alloc->next;
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alloc->next = NULL; /* Could potentially link many blocks together instead */
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result = MALI_MEM_ALLOC_FINISHED;
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}
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}
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else result = MALI_MEM_ALLOC_NONE;
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_mali_osk_lock_signal(info->mutex, _MALI_OSK_LOCKMODE_RW);
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return result;
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}
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static void block_allocator_release_page_table_block( mali_page_table_block *page_table_block )
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{
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block_allocator * info;
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block_info * block, * next;
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MALI_DEBUG_ASSERT_POINTER( page_table_block );
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info = (block_allocator*)page_table_block->ctx;
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block = (block_info*)page_table_block->handle;
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MALI_DEBUG_ASSERT_POINTER(info);
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MALI_DEBUG_ASSERT_POINTER(block);
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if (_MALI_OSK_ERR_OK != _mali_osk_lock_wait(info->mutex, _MALI_OSK_LOCKMODE_RW))
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{
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MALI_DEBUG_PRINT(1, ("allocator release: Failed to get mutex\n"));
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return;
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}
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/* Unmap all the physical memory at once */
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_mali_osk_mem_unmapioregion( page_table_block->phys_base, page_table_block->size, page_table_block->mapping );
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/** @note This loop handles the case where more than one block_info was linked.
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* Probably unnecssary for page table block releasing. */
|
||
|
|
while (block)
|
||
|
|
{
|
||
|
|
next = block->next;
|
||
|
|
|
||
|
|
MALI_DEBUG_ASSERT(!((block < info->all_blocks) || (block > (info->all_blocks + info->num_blocks))));
|
||
|
|
|
||
|
|
block->next = info->first_free;
|
||
|
|
info->first_free = block;
|
||
|
|
|
||
|
|
block = next;
|
||
|
|
}
|
||
|
|
|
||
|
|
_mali_osk_lock_signal(info->mutex, _MALI_OSK_LOCKMODE_RW);
|
||
|
|
}
|
||
|
|
|