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

   1 /**
   2  * Copyright (C) 2010-2015 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 /**
  12  * @file mali_osk_pm.c
  13  * Implementation of the callback functions from common power management
  14  */
  15
  16 #include <linux/sched.h>
  17
  18 #include "mali_kernel_linux.h"
  19 #ifdef CONFIG_PM_RUNTIME
  20 #include <linux/pm_runtime.h>
  21 #endif /* CONFIG_PM_RUNTIME */
  22 #include <linux/platform_device.h>
  23 #include <linux/version.h>
  24 #include "mali_osk.h"
  25 #include "mali_kernel_common.h"
  26
  27 /* Can NOT run in atomic context */
  28 _mali_osk_errcode_t _mali_osk_pm_dev_ref_get_sync(void)
  29 {
  30 #ifdef CONFIG_PM_RUNTIME
  31         int err;
  32         MALI_DEBUG_ASSERT_POINTER(mali_platform_device);
  33         err = pm_runtime_get_sync(&(mali_platform_device->dev));
  34 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37))
  35         pm_runtime_mark_last_busy(&(mali_platform_device->dev));
  36 #endif
  37         if (0 > err) {
  38                 MALI_PRINT_ERROR(("Mali OSK PM: pm_runtime_get_sync() returned error code %d\n", err));
  39                 return _MALI_OSK_ERR_FAULT;
  40         }
  41 #endif
  42         return _MALI_OSK_ERR_OK;
  43 }
  44
  45 /* Can run in atomic context */
  46 _mali_osk_errcode_t _mali_osk_pm_dev_ref_get_async(void)
  47 {
  48 #ifdef CONFIG_PM_RUNTIME
  49         int err;
  50         MALI_DEBUG_ASSERT_POINTER(mali_platform_device);
  51         err = pm_runtime_get(&(mali_platform_device->dev));
  52 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37))
  53         pm_runtime_mark_last_busy(&(mali_platform_device->dev));
  54 #endif
  55         if (0 > err && -EINPROGRESS != err) {
  56                 MALI_PRINT_ERROR(("Mali OSK PM: pm_runtime_get() returned error code %d\n", err));
  57                 return _MALI_OSK_ERR_FAULT;
  58         }
  59 #endif
  60         return _MALI_OSK_ERR_OK;
  61 }
  62
  63
  64 /* Can run in atomic context */
  65 void _mali_osk_pm_dev_ref_put(void)
  66 {
  67 #ifdef CONFIG_PM_RUNTIME
  68         MALI_DEBUG_ASSERT_POINTER(mali_platform_device);
  69 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37))
  70         pm_runtime_mark_last_busy(&(mali_platform_device->dev));
  71         pm_runtime_put_autosuspend(&(mali_platform_device->dev));
  72 #else
  73         pm_runtime_put(&(mali_platform_device->dev));
  74 #endif
  75 #endif
  76 }
  77
  78 void _mali_osk_pm_dev_barrier(void)
  79 {
  80 #ifdef CONFIG_PM_RUNTIME
  81         pm_runtime_barrier(&(mali_platform_device->dev));
  82 #endif
  83 }