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 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 * 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 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