1 /************************************************************************** 2 * 3 * Copyright 2009 VMware, Inc. 4 * Copyright 2016 Axel Davy <axel.davy (at) ens.fr> 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28 /* Adapted from u_upload_mgr. 29 * Makes suballocations from bigger allocations, 30 * while enabling fast mapping. */ 31 32 #include "pipe/p_defines.h" 33 #include "util/u_inlines.h" 34 #include "pipe/p_context.h" 35 #include "util/u_memory.h" 36 #include "util/u_math.h" 37 #include "util/slab.h" 38 39 #include "nine_buffer_upload.h" 40 41 #include "nine_debug.h" 42 43 #define DBG_CHANNEL (DBG_INDEXBUFFER|DBG_VERTEXBUFFER) 44 45 struct nine_buffer_group { 46 unsigned refcount; /* How many sub-buffers live inside the buffer */ 47 struct pipe_resource *resource; 48 struct pipe_transfer *transfer; 49 uint8_t *map; 50 unsigned free_offset; /* Aligned offset to the upload buffer, pointing 51 * at the first unused byte. */ 52 }; 53 54 struct nine_subbuffer { 55 struct nine_buffer_group *parent; /* Can be NULL */ 56 struct pipe_resource *resource; /* The parent resource if apply */ 57 unsigned offset; /* Offset inside the resource */ 58 /* If there is no parent, the resource map. Else NULL. */ 59 struct pipe_transfer *transfer; 60 uint8_t *map; 61 }; 62 63 struct nine_buffer_upload { 64 struct pipe_context *pipe; 65 struct slab_mempool buffer_pool; 66 67 unsigned buffers_size; /* Size of the big allocated buffers */ 68 unsigned num_buffers; 69 struct nine_buffer_group *buffers; 70 }; 71 72 static void 73 nine_upload_create_buffer_group(struct nine_buffer_upload *upload, 74 struct nine_buffer_group *group) 75 { 76 struct pipe_resource resource; 77 struct pipe_screen *screen = upload->pipe->screen; 78 DBG("%p %p\n", upload, group); 79 80 memset(&resource, 0, sizeof(resource)); 81 resource.target = PIPE_BUFFER; 82 resource.format = PIPE_FORMAT_R8_UNORM; 83 resource.bind = PIPE_BIND_VERTEX_BUFFER; 84 resource.usage = PIPE_USAGE_STREAM; 85 resource.width0 = upload->buffers_size; 86 resource.height0 = 1; 87 resource.depth0 = 1; 88 resource.array_size = 1; 89 resource.flags = PIPE_RESOURCE_FLAG_MAP_PERSISTENT | 90 PIPE_RESOURCE_FLAG_MAP_COHERENT; 91 92 group->refcount = 0; 93 group->resource = screen->resource_create(screen, &resource); 94 if (group->resource == NULL) 95 return; 96 97 group->map = pipe_buffer_map_range(upload->pipe, group->resource, 98 0, upload->buffers_size, 99 PIPE_TRANSFER_WRITE | 100 PIPE_TRANSFER_PERSISTENT | 101 PIPE_TRANSFER_COHERENT, 102 &group->transfer); 103 if (group->map == NULL) { 104 group->transfer = NULL; 105 pipe_resource_reference(&group->resource, NULL); 106 return; 107 } 108 109 group->free_offset = 0; 110 } 111 112 static void 113 nine_upload_destroy_buffer_group(struct nine_buffer_upload *upload, 114 struct nine_buffer_group *group) 115 { 116 DBG("%p %p\n", upload, group); 117 assert(group->refcount == 0); 118 119 if (group->transfer) 120 pipe_transfer_unmap(upload->pipe, group->transfer); 121 if (group->resource) 122 pipe_resource_reference(&group->resource, NULL); 123 group->transfer = NULL; 124 group->map = NULL; 125 } 126 127 struct nine_buffer_upload * 128 nine_upload_create(struct pipe_context *pipe, unsigned buffers_size, 129 unsigned num_buffers) 130 { 131 struct nine_buffer_upload *upload; 132 int i; 133 134 DBG("\n"); 135 136 if (!pipe->screen->get_param(pipe->screen, 137 PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT)) 138 return NULL; 139 140 upload = CALLOC_STRUCT(nine_buffer_upload); 141 142 if (!upload) 143 return NULL; 144 145 slab_create(&upload->buffer_pool, sizeof(struct nine_subbuffer), 4096); 146 147 upload->pipe = pipe; 148 upload->buffers_size = align(buffers_size, 4096); 149 upload->num_buffers = num_buffers; 150 151 upload->buffers = CALLOC(num_buffers, sizeof(struct nine_buffer_group)); 152 if (!upload->buffers) 153 goto buffers_fail; 154 155 for (i = 0; i < num_buffers; i++) 156 nine_upload_create_buffer_group(upload, &upload->buffers[i]); 157 158 return upload; 159 160 buffers_fail: 161 slab_destroy(&upload->buffer_pool); 162 FREE(upload); 163 return NULL; 164 } 165 166 void 167 nine_upload_destroy(struct nine_buffer_upload *upload) 168 { 169 int i; 170 171 DBG("%p\n", upload); 172 173 for (i = 0; i < upload->num_buffers; i++) 174 nine_upload_destroy_buffer_group(upload, &upload->buffers[i]); 175 slab_destroy(&upload->buffer_pool); 176 FREE(upload); 177 } 178 179 struct nine_subbuffer * 180 nine_upload_create_buffer(struct nine_buffer_upload *upload, 181 unsigned buffer_size) 182 { 183 struct nine_subbuffer *buf = slab_alloc_st(&upload->buffer_pool); 184 struct nine_buffer_group *group = NULL; 185 unsigned size = align(buffer_size, 4096); 186 int i = 0; 187 188 DBG("%p %d\n", upload, buffer_size); 189 190 if (!buf) 191 return NULL; 192 193 for (i = 0; i < upload->num_buffers; i++) { 194 group = &upload->buffers[i]; 195 if (group->resource && 196 group->free_offset + size <= upload->buffers_size) 197 break; 198 } 199 200 if (i == upload->num_buffers) { 201 /* Allocate lonely buffer */ 202 struct pipe_resource resource; 203 struct pipe_screen *screen = upload->pipe->screen; 204 205 DBG("Allocating buffer\n"); 206 buf->parent = NULL; 207 208 memset(&resource, 0, sizeof(resource)); 209 resource.target = PIPE_BUFFER; 210 resource.format = PIPE_FORMAT_R8_UNORM; 211 resource.bind = PIPE_BIND_VERTEX_BUFFER; 212 resource.usage = PIPE_USAGE_STREAM; 213 resource.width0 = buffer_size; 214 resource.height0 = 1; 215 resource.depth0 = 1; 216 resource.array_size = 1; 217 resource.flags = PIPE_RESOURCE_FLAG_MAP_PERSISTENT | 218 PIPE_RESOURCE_FLAG_MAP_COHERENT; 219 220 buf->resource = screen->resource_create(screen, &resource); 221 if (buf->resource == NULL) { 222 slab_free_st(&upload->buffer_pool, buf); 223 return NULL; 224 } 225 226 buf->map = pipe_buffer_map_range(upload->pipe, buf->resource, 227 0, buffer_size, 228 PIPE_TRANSFER_WRITE | 229 PIPE_TRANSFER_PERSISTENT | 230 PIPE_TRANSFER_COHERENT, 231 &buf->transfer); 232 if (buf->map == NULL) { 233 pipe_resource_reference(&buf->resource, NULL); 234 slab_free_st(&upload->buffer_pool, buf); 235 return NULL; 236 } 237 buf->offset = 0; 238 return buf; 239 } 240 241 DBG("Using buffer group %d\n", i); 242 243 buf->parent = group; 244 buf->resource = NULL; 245 pipe_resource_reference(&buf->resource, group->resource); 246 buf->offset = group->free_offset; 247 248 group->free_offset += size; 249 group->refcount += 1; 250 251 return buf; 252 } 253 254 void 255 nine_upload_release_buffer(struct nine_buffer_upload *upload, 256 struct nine_subbuffer *buf) 257 { 258 DBG("%p %p %p\n", upload, buf, buf->parent); 259 260 if (buf->parent) { 261 pipe_resource_reference(&buf->resource, NULL); 262 buf->parent->refcount--; 263 if (buf->parent->refcount == 0) { 264 /* Allocate new buffer */ 265 nine_upload_destroy_buffer_group(upload, buf->parent); 266 nine_upload_create_buffer_group(upload, buf->parent); 267 } 268 } else { 269 /* lonely buffer */ 270 if (buf->transfer) 271 pipe_transfer_unmap(upload->pipe, buf->transfer); 272 pipe_resource_reference(&buf->resource, NULL); 273 } 274 275 slab_free_st(&upload->buffer_pool, buf); 276 } 277 278 uint8_t * 279 nine_upload_buffer_get_map(struct nine_subbuffer *buf) 280 { 281 if (buf->parent) { 282 return buf->parent->map + buf->offset; 283 } 284 /* lonely buffer */ 285 return buf->map; 286 } 287 288 struct pipe_resource * 289 nine_upload_buffer_resource_and_offset(struct nine_subbuffer *buf, 290 unsigned *offset) 291 { 292 *offset = buf->offset; 293 return buf->resource; 294 } 295
