drivers/misc/mediatek/gpu/mt8127/mali/mali/linux/mali_memory_external.c

   1 /*
   2  * This confidential and proprietary software may be used only as
   3  * authorised by a licensing agreement from ARM Limited
   4  * (C) COPYRIGHT 2013-2015 ARM Limited
   5  * ALL RIGHTS RESERVED
   6  * The entire notice above must be reproduced on all authorised
   7  * copies and copies may only be made to the extent permitted
   8  * by a licensing agreement from ARM Limited.
   9  */
  10
  11 #include "mali_kernel_common.h"
  12 #include "mali_osk.h"
  13 #include "mali_ukk.h"
  14 #include "mali_memory.h"
  15 #include "mali_mem_validation.h"
  16 #include "mali_uk_types.h"
  17
  18 void mali_mem_unbind_ext_buf(mali_mem_backend *mem_backend)
  19 {
  20         mali_mem_allocation *alloc;
  21         struct mali_session_data *session;
  22         MALI_DEBUG_ASSERT_POINTER(mem_backend);
  23         alloc = mem_backend->mali_allocation;
  24         MALI_DEBUG_ASSERT_POINTER(alloc);
  25         MALI_DEBUG_ASSERT(MALI_MEM_EXTERNAL == mem_backend->type);
  26
  27         session = alloc->session;
  28         MALI_DEBUG_ASSERT_POINTER(session);
  29         mali_session_memory_lock(session);
  30         mali_mem_mali_map_free(session, alloc->psize, alloc->mali_vma_node.vm_node.start,
  31                                alloc->flags);
  32         mali_session_memory_unlock(session);
  33 }
  34
  35 _mali_osk_errcode_t mali_mem_bind_ext_buf(mali_mem_allocation *alloc,
  36                 mali_mem_backend *mem_backend,
  37                 u32 phys_addr,
  38                 u32 flag)
  39 {
  40         struct mali_session_data *session;
  41         _mali_osk_errcode_t err;
  42         u32 virt, phys, size;
  43         MALI_DEBUG_ASSERT_POINTER(mem_backend);
  44         MALI_DEBUG_ASSERT_POINTER(alloc);
  45         size = alloc->psize;
  46         session = (struct mali_session_data *)(uintptr_t)alloc->session;
  47         MALI_CHECK_NON_NULL(session, _MALI_OSK_ERR_INVALID_ARGS);
  48
  49         /* check arguments */
  50         /* NULL might be a valid Mali address */
  51         if (!size) MALI_ERROR(_MALI_OSK_ERR_INVALID_ARGS);
  52
  53         /* size must be a multiple of the system page size */
  54         if (size % _MALI_OSK_MALI_PAGE_SIZE) MALI_ERROR(_MALI_OSK_ERR_INVALID_ARGS);
  55
  56         /* Validate the mali physical range */
  57         if (_MALI_OSK_ERR_OK != mali_mem_validation_check(phys_addr, size)) {
  58                 return _MALI_OSK_ERR_FAULT;
  59         }
  60
  61         if (flag & _MALI_MAP_EXTERNAL_MAP_GUARD_PAGE) {
  62                 alloc->flags |= MALI_MEM_FLAG_MALI_GUARD_PAGE;
  63         }
  64
  65         mali_session_memory_lock(session);
  66
  67         virt = alloc->mali_vma_node.vm_node.start;
  68         phys = phys_addr;
  69
  70         err = mali_mem_mali_map_prepare(alloc);
  71         if (_MALI_OSK_ERR_OK != err) {
  72                 mali_session_memory_unlock(session);
  73                 return _MALI_OSK_ERR_NOMEM;
  74         }
  75
  76         mali_mmu_pagedir_update(session->page_directory, virt, phys, size, MALI_MMU_FLAGS_DEFAULT);
  77
  78         if (alloc->flags & MALI_MEM_FLAG_MALI_GUARD_PAGE) {
  79                 mali_mmu_pagedir_update(session->page_directory, virt + size, phys, _MALI_OSK_MALI_PAGE_SIZE, MALI_MMU_FLAGS_DEFAULT);
  80         }
  81         MALI_DEBUG_PRINT(3,
  82                          ("Requested to map physical memory 0x%x-0x%x into virtual memory 0x%x\n",
  83                           phys_addr, (phys_addr + size - 1),
  84                           virt));
  85         mali_session_memory_unlock(session);
  86
  87         MALI_SUCCESS;
  88 }
  89