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5564 | serge | 1 | /* |
2 | * Copyright 2003 VMware, Inc. |
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3 | * Copyright © 2007 Intel Corporation |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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6 | * copy of this software and associated documentation files (the "Software"), |
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7 | * to deal in the Software without restriction, including without limitation |
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8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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9 | * and/or sell copies of the Software, and to permit persons to whom the |
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10 | * Software is furnished to do so, subject to the following conditions: |
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11 | * |
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12 | * The above copyright notice and this permission notice (including the next |
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13 | * paragraph) shall be included in all copies or substantial portions of the |
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14 | * Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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22 | * IN THE SOFTWARE. |
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23 | */ |
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24 | |||
25 | /** |
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26 | * @file intel_upload.c |
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27 | * |
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28 | * Batched upload via BOs. |
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29 | */ |
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30 | |||
31 | #include "main/imports.h" |
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32 | #include "main/mtypes.h" |
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33 | #include "main/macros.h" |
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34 | #include "main/bufferobj.h" |
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35 | |||
36 | #include "brw_context.h" |
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37 | #include "intel_blit.h" |
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38 | #include "intel_buffer_objects.h" |
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39 | #include "intel_batchbuffer.h" |
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40 | #include "intel_fbo.h" |
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41 | #include "intel_mipmap_tree.h" |
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42 | |||
43 | #include "brw_context.h" |
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44 | |||
45 | #define INTEL_UPLOAD_SIZE (64*1024) |
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46 | |||
47 | /** |
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48 | * Like ALIGN(), but works with a non-power-of-two alignment. |
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49 | */ |
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50 | #define ALIGN_NPOT(value, alignment) \ |
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51 | (((value) + (alignment) - 1) / (alignment) * (alignment)) |
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52 | |||
53 | void |
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54 | intel_upload_finish(struct brw_context *brw) |
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55 | { |
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56 | if (!brw->upload.bo) |
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57 | return; |
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58 | |||
59 | drm_intel_bo_unmap(brw->upload.bo); |
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60 | drm_intel_bo_unreference(brw->upload.bo); |
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61 | brw->upload.bo = NULL; |
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62 | brw->upload.next_offset = 0; |
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63 | } |
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64 | |||
65 | /** |
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66 | * Interface for getting memory for uploading streamed data to the GPU |
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67 | * |
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68 | * In most cases, streamed data (for GPU state structures, for example) is |
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69 | * uploaded through brw_state_batch(), since that interface allows relocations |
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70 | * from the streamed space returned to other BOs. However, that interface has |
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71 | * the restriction that the amount of space allocated has to be "small" (see |
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72 | * estimated_max_prim_size in brw_draw.c). |
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73 | * |
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74 | * This interface, on the other hand, is able to handle arbitrary sized |
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75 | * allocation requests, though it will batch small allocations into the same |
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76 | * BO for efficiency and reduced memory footprint. |
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77 | * |
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78 | * \note The returned pointer is valid only until intel_upload_finish(), which |
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79 | * will happen at batch flush or the next |
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80 | * intel_upload_space()/intel_upload_data(). |
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81 | * |
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82 | * \param out_bo Pointer to a BO, which must point to a valid BO or NULL on |
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83 | * entry, and will have a reference to the new BO containing the state on |
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84 | * return. |
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85 | * |
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86 | * \param out_offset Offset within the buffer object that the data will land. |
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87 | */ |
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88 | void * |
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89 | intel_upload_space(struct brw_context *brw, |
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90 | uint32_t size, |
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91 | uint32_t alignment, |
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92 | drm_intel_bo **out_bo, |
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93 | uint32_t *out_offset) |
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94 | { |
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95 | uint32_t offset; |
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96 | |||
97 | offset = ALIGN_NPOT(brw->upload.next_offset, alignment); |
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98 | if (brw->upload.bo && offset + size > brw->upload.bo->size) { |
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99 | intel_upload_finish(brw); |
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100 | offset = 0; |
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101 | } |
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102 | |||
103 | if (!brw->upload.bo) { |
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104 | brw->upload.bo = drm_intel_bo_alloc(brw->bufmgr, "streamed data", |
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105 | MAX2(INTEL_UPLOAD_SIZE, size), 4096); |
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106 | if (brw->has_llc) |
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107 | drm_intel_bo_map(brw->upload.bo, true); |
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108 | else |
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109 | drm_intel_gem_bo_map_gtt(brw->upload.bo); |
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110 | } |
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111 | |||
112 | brw->upload.next_offset = offset + size; |
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113 | |||
114 | *out_offset = offset; |
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115 | if (*out_bo != brw->upload.bo) { |
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116 | drm_intel_bo_unreference(*out_bo); |
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117 | *out_bo = brw->upload.bo; |
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118 | drm_intel_bo_reference(brw->upload.bo); |
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119 | } |
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120 | |||
121 | return brw->upload.bo->virtual + offset; |
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122 | } |
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123 | |||
124 | /** |
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125 | * Handy interface to upload some data to temporary GPU memory quickly. |
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126 | * |
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127 | * References to this memory should not be retained across batch flushes. |
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128 | */ |
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129 | void |
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130 | intel_upload_data(struct brw_context *brw, |
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131 | const void *data, |
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132 | uint32_t size, |
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133 | uint32_t alignment, |
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134 | drm_intel_bo **out_bo, |
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135 | uint32_t *out_offset) |
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136 | { |
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137 | void *dst = intel_upload_space(brw, size, alignment, out_bo, out_offset); |
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138 | memcpy(dst, data, size); |
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139 | } |