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3031 | serge | 1 | /** |
2 | * \file drm_stub.h |
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3 | * Stub support |
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4 | * |
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5 | * \author Rickard E. (Rik) Faith |
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6 | */ |
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7 | |||
8 | /* |
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9 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org |
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10 | * |
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11 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. |
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12 | * All Rights Reserved. |
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13 | * |
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14 | * Permission is hereby granted, free of charge, to any person obtaining a |
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15 | * copy of this software and associated documentation files (the "Software"), |
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16 | * to deal in the Software without restriction, including without limitation |
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17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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18 | * and/or sell copies of the Software, and to permit persons to whom the |
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19 | * Software is furnished to do so, subject to the following conditions: |
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20 | * |
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21 | * The above copyright notice and this permission notice (including the next |
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22 | * paragraph) shall be included in all copies or substantial portions of the |
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23 | * Software. |
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24 | * |
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25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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28 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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31 | * DEALINGS IN THE SOFTWARE. |
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32 | */ |
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33 | |||
34 | #include |
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35 | |||
36 | #include |
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37 | #include |
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38 | |||
39 | struct va_format { |
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40 | const char *fmt; |
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41 | va_list *va; |
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42 | }; |
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43 | |||
44 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
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45 | EXPORT_SYMBOL(drm_debug); |
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46 | |||
47 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
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48 | EXPORT_SYMBOL(drm_vblank_offdelay); |
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49 | |||
50 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
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51 | EXPORT_SYMBOL(drm_timestamp_precision); |
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52 | |||
53 | int drm_err(const char *func, const char *format, ...) |
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54 | { |
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55 | struct va_format vaf; |
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56 | va_list args; |
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57 | int r; |
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58 | |||
59 | va_start(args, format); |
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60 | |||
61 | vaf.fmt = format; |
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62 | vaf.va = &args; |
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63 | |||
64 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); |
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65 | |||
66 | va_end(args); |
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67 | |||
68 | return r; |
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69 | } |
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70 | EXPORT_SYMBOL(drm_err); |
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71 | |||
72 | void drm_ut_debug_printk(unsigned int request_level, |
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73 | const char *prefix, |
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74 | const char *function_name, |
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75 | const char *format, ...) |
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76 | { |
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77 | va_list args; |
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78 | |||
79 | // if (drm_debug & request_level) { |
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80 | // if (function_name) |
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81 | // printk(KERN_DEBUG "[%s:%s], ", prefix, function_name); |
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82 | // va_start(args, format); |
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83 | // vprintk(format, args); |
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84 | // va_end(args); |
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85 | // } |
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86 | } |
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87 | EXPORT_SYMBOL(drm_ut_debug_printk); |
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88 | |||
89 | /** |
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90 | * Compute size order. Returns the exponent of the smaller power of two which |
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91 | * is greater or equal to given number. |
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92 | * |
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93 | * \param size size. |
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94 | * \return order. |
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95 | * |
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96 | * \todo Can be made faster. |
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97 | */ |
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98 | int drm_order(unsigned long size) |
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99 | { |
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100 | int order; |
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101 | unsigned long tmp; |
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102 | |||
103 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
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104 | |||
105 | if (size & (size - 1)) |
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106 | ++order; |
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107 | |||
108 | return order; |
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109 | } |
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3260 | Serge | 110 | |
111 | extern int x86_clflush_size; |
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112 | |||
113 | static inline void clflush(volatile void *__p) |
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114 | { |
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115 | asm volatile("clflush %0" : "+m" (*(volatile char*)__p)); |
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116 | } |
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117 | |||
118 | void |
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119 | drm_clflush_virt_range(char *addr, unsigned long length) |
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120 | { |
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121 | char *end = addr + length; |
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122 | mb(); |
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123 | for (; addr < end; addr += x86_clflush_size) |
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124 | clflush(addr); |
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125 | clflush(end - 1); |
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126 | mb(); |
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127 | return; |
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128 | }> |
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129 |