drivers/gpu/arm/mali400/mali/linux/mali_memory_util.c

   1 /*
   2  * Copyright (C) 2013-2015 ARM Limited. All rights reserved.
   3  *
   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.
   6  *
   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.
   9  */
  10
  11 #include <linux/list.h>
  12 #include <linux/mm.h>
  13 #include <linux/mm_types.h>
  14 #include <linux/fs.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/slab.h>
  17 #include <linux/platform_device.h>
  18
  19 #include "mali_osk.h"
  20 #include "mali_osk_mali.h"
  21 #include "mali_kernel_linux.h"
  22 #include "mali_scheduler.h"
  23
  24 #include "mali_memory.h"
  25 #include "mali_memory_os_alloc.h"
  26 #if defined(CONFIG_DMA_SHARED_BUFFER)
  27 #include "mali_memory_dma_buf.h"
  28 #endif
  29 #if defined(CONFIG_MALI400_UMP)
  30 #include "mali_memory_ump.h"
  31 #endif
  32 #include "mali_memory_external.h"
  33 #include "mali_memory_manager.h"
  34 #include "mali_memory_virtual.h"
  35 #include "mali_memory_cow.h"
  36 #include "mali_memory_block_alloc.h"
  37 #include "mali_memory_swap_alloc.h"
  38
  39
  40
  41 /**
  42 *function @_mali_free_allocation_mem - free a memory allocation
  43 */
  44 static u32 _mali_free_allocation_mem(mali_mem_allocation *mali_alloc)
  45 {
  46         mali_mem_backend *mem_bkend = NULL;
  47         u32 free_pages_nr = 0;
  48
  49         struct mali_session_data *session = mali_alloc->session;
  50         MALI_DEBUG_PRINT(4, (" _mali_free_allocation_mem, psize =0x%x! \n", mali_alloc->psize));
  51         if (0 == mali_alloc->psize)
  52                 goto out;
  53
  54         /* Get backend memory & Map on CPU */
  55         mutex_lock(&mali_idr_mutex);
  56         mem_bkend = idr_find(&mali_backend_idr, mali_alloc->backend_handle);
  57         mutex_unlock(&mali_idr_mutex);
  58         MALI_DEBUG_ASSERT(NULL != mem_bkend);
  59
  60         switch (mem_bkend->type) {
  61         case MALI_MEM_OS:
  62                 free_pages_nr = mali_mem_os_release(mem_bkend);
  63                 atomic_sub(free_pages_nr, &session->mali_mem_allocated_pages);
  64                 break;
  65         case MALI_MEM_UMP:
  66 #if defined(CONFIG_MALI400_UMP)
  67                 mali_mem_unbind_ump_buf(mem_bkend);
  68                 atomic_sub(mem_bkend->size / MALI_MMU_PAGE_SIZE, &session->mali_mem_array[mem_bkend->type]);
  69 #else
  70                 MALI_DEBUG_PRINT(2, ("UMP not supported\n"));
  71 #endif
  72                 break;
  73         case MALI_MEM_DMA_BUF:
  74 #if defined(CONFIG_DMA_SHARED_BUFFER)
  75                 mali_mem_unbind_dma_buf(mem_bkend);
  76                 atomic_sub(mem_bkend->size / MALI_MMU_PAGE_SIZE, &session->mali_mem_array[mem_bkend->type]);
  77 #else
  78                 MALI_DEBUG_PRINT(2, ("DMA not supported\n"));
  79 #endif
  80                 break;
  81         case MALI_MEM_EXTERNAL:
  82                 mali_mem_unbind_ext_buf(mem_bkend);
  83                 atomic_sub(mem_bkend->size / MALI_MMU_PAGE_SIZE, &session->mali_mem_array[mem_bkend->type]);
  84                 break;
  85
  86         case MALI_MEM_BLOCK:
  87                 free_pages_nr = mali_mem_block_release(mem_bkend);
  88                 atomic_sub(free_pages_nr, &session->mali_mem_allocated_pages);
  89                 break;
  90
  91         case MALI_MEM_COW:
  92                 if (mem_bkend->flags & MALI_MEM_BACKEND_FLAG_SWAP_COWED) {
  93                         free_pages_nr = mali_mem_swap_release(mem_bkend, MALI_TRUE);
  94                 } else {
  95                         free_pages_nr = mali_mem_cow_release(mem_bkend, MALI_TRUE);
  96                 }
  97                 atomic_sub(free_pages_nr, &session->mali_mem_allocated_pages);
  98                 break;
  99         case MALI_MEM_SWAP:
 100                 free_pages_nr = mali_mem_swap_release(mem_bkend, MALI_TRUE);
 101                 atomic_sub(free_pages_nr, &session->mali_mem_allocated_pages);
 102                 atomic_sub(free_pages_nr, &session->mali_mem_array[mem_bkend->type]);
 103                 break;
 104         default:
 105                 MALI_DEBUG_PRINT(1, ("mem type %d is not in the mali_mem_type enum.\n", mem_bkend->type));
 106                 break;
 107         }
 108
 109         /*Remove backend memory idex */
 110         mutex_lock(&mali_idr_mutex);
 111         idr_remove(&mali_backend_idr, mali_alloc->backend_handle);
 112         mutex_unlock(&mali_idr_mutex);
 113         kfree(mem_bkend);
 114 out:
 115         /* remove memory allocation  */
 116         mali_vma_offset_remove(&session->allocation_mgr, &mali_alloc->mali_vma_node);
 117         mali_mem_allocation_struct_destory(mali_alloc);
 118         return free_pages_nr;
 119 }
 120
 121 /**
 122 *  ref_count for allocation
 123 */
 124 u32 mali_allocation_unref(struct mali_mem_allocation **alloc)
 125 {
 126         u32 free_pages_nr = 0;
 127         mali_mem_allocation *mali_alloc = *alloc;
 128         *alloc = NULL;
 129         if (0 == _mali_osk_atomic_dec_return(&mali_alloc->mem_alloc_refcount)) {
 130                 free_pages_nr = _mali_free_allocation_mem(mali_alloc);
 131         }
 132         return free_pages_nr;
 133 }
 134
 135 void mali_allocation_ref(struct mali_mem_allocation *alloc)
 136 {
 137         _mali_osk_atomic_inc(&alloc->mem_alloc_refcount);
 138 }
 139
 140 void mali_free_session_allocations(struct mali_session_data *session)
 141 {
 142         struct mali_mem_allocation *entry, *next;
 143
 144         MALI_DEBUG_PRINT(4, (" mali_free_session_allocations! \n"));
 145
 146         list_for_each_entry_safe(entry, next, &session->allocation_mgr.head, list) {
 147                 mali_allocation_unref(&entry);
 148         }
 149 }