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