drivers/gpu/drm/amd/display/dc/os_types.h

   1 /*
   2  * Copyright 2012-16 Advanced Micro Devices, Inc.
   3  * Copyright 2019 Raptor Engineering, LLC
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21  * OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors: AMD
  24  *
  25  */
  26
  27 #ifndef _OS_TYPES_H_
  28 #define _OS_TYPES_H_
  29
  30 #include <linux/kgdb.h>
  31 #include <linux/kref.h>
  32 #include <linux/types.h>
  33 #include <linux/slab.h>
  34
  35 #include <asm/byteorder.h>
  36
  37 #include <drm/drm_print.h>
  38
  39 #include "cgs_common.h"
  40
  41 #if defined(__BIG_ENDIAN) && !defined(BIGENDIAN_CPU)
  42 #define BIGENDIAN_CPU
  43 #elif defined(__LITTLE_ENDIAN) && !defined(LITTLEENDIAN_CPU)
  44 #define LITTLEENDIAN_CPU
  45 #endif
  46
  47 #undef FRAME_SIZE
  48
  49 #define dm_output_to_console(fmt, ...) DRM_DEBUG_KMS(fmt, ##__VA_ARGS__)
  50
  51 #define dm_error(fmt, ...) DRM_ERROR(fmt, ##__VA_ARGS__)
  52
  53 #if defined(CONFIG_DRM_AMD_DC_DCN)
  54 #if defined(CONFIG_X86)
  55 #include <asm/fpu/api.h>
  56 #define DC_FP_START() kernel_fpu_begin()
  57 #define DC_FP_END() kernel_fpu_end()
  58 #elif defined(CONFIG_ARM64)
  59 #include <asm/neon.h>
  60 #define DC_FP_START() kernel_neon_begin()
  61 #define DC_FP_END() kernel_neon_end()
  62 #elif defined(CONFIG_PPC64)
  63 #include <asm/switch_to.h>
  64 #include <asm/cputable.h>
  65 #define DC_FP_START() { \
  66         if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \
  67                 preempt_disable(); \
  68                 enable_kernel_vsx(); \
  69         } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \
  70                 preempt_disable(); \
  71                 enable_kernel_altivec(); \
  72         } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \
  73                 preempt_disable(); \
  74                 enable_kernel_fp(); \
  75         } \
  76 }
  77 #define DC_FP_END() { \
  78         if (cpu_has_feature(CPU_FTR_VSX_COMP)) { \
  79                 disable_kernel_vsx(); \
  80                 preempt_enable(); \
  81         } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) { \
  82                 disable_kernel_altivec(); \
  83                 preempt_enable(); \
  84         } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) { \
  85                 disable_kernel_fp(); \
  86                 preempt_enable(); \
  87         } \
  88 }
  89 #endif
  90 #endif
  91
  92 /*
  93  *
  94  * general debug capabilities
  95  *
  96  */
  97 #ifdef CONFIG_DEBUG_KERNEL_DC
  98 #define dc_breakpoint()         kgdb_breakpoint()
  99 #else
 100 #define dc_breakpoint()         do {} while (0)
 101 #endif
 102
 103 #define ASSERT_CRITICAL(expr) do {              \
 104                 if (WARN_ON(!(expr)))           \
 105                         dc_breakpoint();        \
 106         } while (0)
 107
 108 #define ASSERT(expr) do {                       \
 109                 if (WARN_ON_ONCE(!(expr)))      \
 110                         dc_breakpoint();        \
 111         } while (0)
 112
 113 #define BREAK_TO_DEBUGGER() \
 114         do { \
 115                 DRM_DEBUG_DRIVER("%s():%d\n", __func__, __LINE__); \
 116                 dc_breakpoint(); \
 117         } while (0)
 118
 119 #define DC_ERR(...)  do { \
 120         dm_error(__VA_ARGS__); \
 121         BREAK_TO_DEBUGGER(); \
 122 } while (0)
 123
 124 #endif /* _OS_TYPES_H_ */