Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 1 | /************************************************************************** |
| 2 | * |
| 3 | * Copyright © 2012 VMware, Inc., Palo Alto, CA., USA |
| 4 | * All Rights Reserved. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
| 12 | * the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice (including the |
| 15 | * next paragraph) shall be included in all copies or substantial portions |
| 16 | * of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| 21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| 22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| 23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| 24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | **************************************************************************/ |
| 27 | |
| 28 | #include "vmwgfx_drv.h" |
| 29 | |
| 30 | /* |
Thomas Hellstrom | 7cba906 | 2014-01-09 11:03:18 +0100 | [diff] [blame^] | 31 | * If we set up the screen target otable, screen objects stop working. |
| 32 | */ |
| 33 | |
| 34 | #define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE) ? 0 : 1) |
| 35 | |
| 36 | /* |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 37 | * Currently the MOB interface does not support 64-bit page frame numbers. |
| 38 | * This might change in the future to be similar to the GMR2 interface |
| 39 | * when virtual machines support memory beyond 16TB. |
| 40 | */ |
| 41 | |
| 42 | #define VMW_PPN_SIZE 4 |
| 43 | |
| 44 | /* |
| 45 | * struct vmw_mob - Structure containing page table and metadata for a |
| 46 | * Guest Memory OBject. |
| 47 | * |
| 48 | * @num_pages Number of pages that make up the page table. |
| 49 | * @pt_level The indirection level of the page table. 0-2. |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 50 | * @pt_root_page DMA address of the level 0 page of the page table. |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 51 | */ |
| 52 | struct vmw_mob { |
| 53 | struct ttm_buffer_object *pt_bo; |
| 54 | unsigned long num_pages; |
| 55 | unsigned pt_level; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 56 | dma_addr_t pt_root_page; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 57 | uint32_t id; |
| 58 | }; |
| 59 | |
| 60 | /* |
| 61 | * struct vmw_otable - Guest Memory OBject table metadata |
| 62 | * |
| 63 | * @size: Size of the table (page-aligned). |
| 64 | * @page_table: Pointer to a struct vmw_mob holding the page table. |
| 65 | */ |
| 66 | struct vmw_otable { |
| 67 | unsigned long size; |
| 68 | struct vmw_mob *page_table; |
| 69 | }; |
| 70 | |
| 71 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, |
| 72 | struct vmw_mob *mob); |
| 73 | static void vmw_mob_pt_setup(struct vmw_mob *mob, |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 74 | struct vmw_piter data_iter, |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 75 | unsigned long num_data_pages); |
| 76 | |
| 77 | /* |
| 78 | * vmw_setup_otable_base - Issue an object table base setup command to |
| 79 | * the device |
| 80 | * |
| 81 | * @dev_priv: Pointer to a device private structure |
| 82 | * @type: Type of object table base |
| 83 | * @offset Start of table offset into dev_priv::otable_bo |
| 84 | * @otable Pointer to otable metadata; |
| 85 | * |
| 86 | * This function returns -ENOMEM if it fails to reserve fifo space, |
| 87 | * and may block waiting for fifo space. |
| 88 | */ |
| 89 | static int vmw_setup_otable_base(struct vmw_private *dev_priv, |
| 90 | SVGAOTableType type, |
| 91 | unsigned long offset, |
| 92 | struct vmw_otable *otable) |
| 93 | { |
| 94 | struct { |
| 95 | SVGA3dCmdHeader header; |
| 96 | SVGA3dCmdSetOTableBase body; |
| 97 | } *cmd; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 98 | struct vmw_mob *mob; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 99 | const struct vmw_sg_table *vsgt; |
| 100 | struct vmw_piter iter; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 101 | int ret; |
| 102 | |
| 103 | BUG_ON(otable->page_table != NULL); |
| 104 | |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 105 | vsgt = vmw_bo_sg_table(dev_priv->otable_bo); |
| 106 | vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT); |
| 107 | WARN_ON(!vmw_piter_next(&iter)); |
| 108 | |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 109 | mob = vmw_mob_create(otable->size >> PAGE_SHIFT); |
| 110 | if (unlikely(mob == NULL)) { |
| 111 | DRM_ERROR("Failed creating OTable page table.\n"); |
| 112 | return -ENOMEM; |
| 113 | } |
| 114 | |
| 115 | if (otable->size <= PAGE_SIZE) { |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 116 | mob->pt_level = SVGA3D_MOBFMT_PTDEPTH_0; |
| 117 | mob->pt_root_page = vmw_piter_dma_addr(&iter); |
| 118 | } else if (vsgt->num_regions == 1) { |
| 119 | mob->pt_level = SVGA3D_MOBFMT_RANGE; |
| 120 | mob->pt_root_page = vmw_piter_dma_addr(&iter); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 121 | } else { |
| 122 | ret = vmw_mob_pt_populate(dev_priv, mob); |
| 123 | if (unlikely(ret != 0)) |
| 124 | goto out_no_populate; |
| 125 | |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 126 | vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); |
| 130 | if (unlikely(cmd == NULL)) { |
| 131 | DRM_ERROR("Failed reserving FIFO space for OTable setup.\n"); |
| 132 | goto out_no_fifo; |
| 133 | } |
| 134 | |
| 135 | memset(cmd, 0, sizeof(*cmd)); |
| 136 | cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; |
| 137 | cmd->header.size = sizeof(cmd->body); |
| 138 | cmd->body.type = type; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 139 | cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 140 | cmd->body.sizeInBytes = otable->size; |
| 141 | cmd->body.validSizeInBytes = 0; |
| 142 | cmd->body.ptDepth = mob->pt_level; |
| 143 | |
| 144 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); |
| 145 | otable->page_table = mob; |
| 146 | |
| 147 | return 0; |
| 148 | |
| 149 | out_no_fifo: |
| 150 | out_no_populate: |
| 151 | vmw_mob_destroy(mob); |
| 152 | return ret; |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * vmw_takedown_otable_base - Issue an object table base takedown command |
| 157 | * to the device |
| 158 | * |
| 159 | * @dev_priv: Pointer to a device private structure |
| 160 | * @type: Type of object table base |
| 161 | * |
| 162 | */ |
| 163 | static void vmw_takedown_otable_base(struct vmw_private *dev_priv, |
| 164 | SVGAOTableType type, |
| 165 | struct vmw_otable *otable) |
| 166 | { |
| 167 | struct { |
| 168 | SVGA3dCmdHeader header; |
| 169 | SVGA3dCmdSetOTableBase body; |
| 170 | } *cmd; |
| 171 | struct ttm_buffer_object *bo = otable->page_table->pt_bo; |
| 172 | |
| 173 | if (otable->page_table == NULL) |
| 174 | return; |
| 175 | |
| 176 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); |
| 177 | if (unlikely(cmd == NULL)) |
| 178 | DRM_ERROR("Failed reserving FIFO space for OTable setup.\n"); |
| 179 | |
| 180 | memset(cmd, 0, sizeof(*cmd)); |
| 181 | cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; |
| 182 | cmd->header.size = sizeof(cmd->body); |
| 183 | cmd->body.type = type; |
| 184 | cmd->body.baseAddress = 0; |
| 185 | cmd->body.sizeInBytes = 0; |
| 186 | cmd->body.validSizeInBytes = 0; |
| 187 | cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID; |
| 188 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); |
| 189 | |
| 190 | if (bo) { |
| 191 | int ret; |
| 192 | |
| 193 | ret = ttm_bo_reserve(bo, false, true, false, false); |
| 194 | BUG_ON(ret != 0); |
| 195 | |
| 196 | vmw_fence_single_bo(bo, NULL); |
| 197 | ttm_bo_unreserve(bo); |
| 198 | } |
| 199 | |
| 200 | vmw_mob_destroy(otable->page_table); |
| 201 | otable->page_table = NULL; |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * vmw_otables_setup - Set up guest backed memory object tables |
| 206 | * |
| 207 | * @dev_priv: Pointer to a device private structure |
| 208 | * |
| 209 | * Takes care of the device guest backed surface |
| 210 | * initialization, by setting up the guest backed memory object tables. |
| 211 | * Returns 0 on success and various error codes on failure. A succesful return |
| 212 | * means the object tables can be taken down using the vmw_otables_takedown |
| 213 | * function. |
| 214 | */ |
| 215 | int vmw_otables_setup(struct vmw_private *dev_priv) |
| 216 | { |
| 217 | unsigned long offset; |
| 218 | unsigned long bo_size; |
| 219 | struct vmw_otable *otables; |
| 220 | SVGAOTableType i; |
| 221 | int ret; |
| 222 | |
Thomas Hellstrom | 7cba906 | 2014-01-09 11:03:18 +0100 | [diff] [blame^] | 223 | otables = kzalloc(SVGA_OTABLE_DX9_MAX * sizeof(*otables), |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 224 | GFP_KERNEL); |
| 225 | if (unlikely(otables == NULL)) { |
| 226 | DRM_ERROR("Failed to allocate space for otable " |
| 227 | "metadata.\n"); |
| 228 | return -ENOMEM; |
| 229 | } |
| 230 | |
| 231 | otables[SVGA_OTABLE_MOB].size = |
| 232 | VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE; |
| 233 | otables[SVGA_OTABLE_SURFACE].size = |
| 234 | VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE; |
| 235 | otables[SVGA_OTABLE_CONTEXT].size = |
| 236 | VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE; |
| 237 | otables[SVGA_OTABLE_SHADER].size = |
| 238 | VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE; |
Thomas Hellstrom | 7cba906 | 2014-01-09 11:03:18 +0100 | [diff] [blame^] | 239 | otables[SVGA_OTABLE_SCREEN_TARGET].size = |
| 240 | VMWGFX_NUM_GB_SCREEN_TARGET * |
| 241 | SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 242 | |
| 243 | bo_size = 0; |
Thomas Hellstrom | 7cba906 | 2014-01-09 11:03:18 +0100 | [diff] [blame^] | 244 | for (i = 0; i < SVGA_OTABLE_DX9_MAX; ++i) { |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 245 | otables[i].size = |
| 246 | (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK; |
| 247 | bo_size += otables[i].size; |
| 248 | } |
| 249 | |
| 250 | ret = ttm_bo_create(&dev_priv->bdev, bo_size, |
| 251 | ttm_bo_type_device, |
| 252 | &vmw_sys_ne_placement, |
| 253 | 0, false, NULL, |
| 254 | &dev_priv->otable_bo); |
| 255 | |
| 256 | if (unlikely(ret != 0)) |
| 257 | goto out_no_bo; |
| 258 | |
| 259 | ret = ttm_bo_reserve(dev_priv->otable_bo, false, true, false, false); |
| 260 | BUG_ON(ret != 0); |
| 261 | ret = vmw_bo_driver.ttm_tt_populate(dev_priv->otable_bo->ttm); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 262 | if (unlikely(ret != 0)) |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 263 | goto out_unreserve; |
| 264 | ret = vmw_bo_map_dma(dev_priv->otable_bo); |
| 265 | if (unlikely(ret != 0)) |
| 266 | goto out_unreserve; |
| 267 | |
| 268 | ttm_bo_unreserve(dev_priv->otable_bo); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 269 | |
| 270 | offset = 0; |
Thomas Hellstrom | 7cba906 | 2014-01-09 11:03:18 +0100 | [diff] [blame^] | 271 | for (i = 0; i < SVGA_OTABLE_DX9_MAX - VMW_OTABLE_SETUP_SUB; ++i) { |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 272 | ret = vmw_setup_otable_base(dev_priv, i, offset, |
| 273 | &otables[i]); |
| 274 | if (unlikely(ret != 0)) |
| 275 | goto out_no_setup; |
| 276 | offset += otables[i].size; |
| 277 | } |
| 278 | |
| 279 | dev_priv->otables = otables; |
| 280 | return 0; |
| 281 | |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 282 | out_unreserve: |
| 283 | ttm_bo_unreserve(dev_priv->otable_bo); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 284 | out_no_setup: |
Thomas Hellstrom | 7cba906 | 2014-01-09 11:03:18 +0100 | [diff] [blame^] | 285 | for (i = 0; i < SVGA_OTABLE_DX9_MAX - VMW_OTABLE_SETUP_SUB; ++i) |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 286 | vmw_takedown_otable_base(dev_priv, i, &otables[i]); |
| 287 | |
| 288 | ttm_bo_unref(&dev_priv->otable_bo); |
| 289 | out_no_bo: |
| 290 | kfree(otables); |
| 291 | return ret; |
| 292 | } |
| 293 | |
| 294 | |
| 295 | /* |
| 296 | * vmw_otables_takedown - Take down guest backed memory object tables |
| 297 | * |
| 298 | * @dev_priv: Pointer to a device private structure |
| 299 | * |
| 300 | * Take down the Guest Memory Object tables. |
| 301 | */ |
| 302 | void vmw_otables_takedown(struct vmw_private *dev_priv) |
| 303 | { |
| 304 | SVGAOTableType i; |
| 305 | struct ttm_buffer_object *bo = dev_priv->otable_bo; |
| 306 | int ret; |
| 307 | |
Thomas Hellstrom | 7cba906 | 2014-01-09 11:03:18 +0100 | [diff] [blame^] | 308 | for (i = 0; i < SVGA_OTABLE_DX9_MAX - VMW_OTABLE_SETUP_SUB; ++i) |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 309 | vmw_takedown_otable_base(dev_priv, i, |
| 310 | &dev_priv->otables[i]); |
| 311 | |
| 312 | ret = ttm_bo_reserve(bo, false, true, false, false); |
| 313 | BUG_ON(ret != 0); |
| 314 | |
| 315 | vmw_fence_single_bo(bo, NULL); |
| 316 | ttm_bo_unreserve(bo); |
| 317 | |
| 318 | ttm_bo_unref(&dev_priv->otable_bo); |
| 319 | kfree(dev_priv->otables); |
| 320 | dev_priv->otables = NULL; |
| 321 | } |
| 322 | |
| 323 | |
| 324 | /* |
| 325 | * vmw_mob_calculate_pt_pages - Calculate the number of page table pages |
| 326 | * needed for a guest backed memory object. |
| 327 | * |
| 328 | * @data_pages: Number of data pages in the memory object buffer. |
| 329 | */ |
| 330 | static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) |
| 331 | { |
| 332 | unsigned long data_size = data_pages * PAGE_SIZE; |
| 333 | unsigned long tot_size = 0; |
| 334 | |
| 335 | while (likely(data_size > PAGE_SIZE)) { |
| 336 | data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); |
| 337 | data_size *= VMW_PPN_SIZE; |
| 338 | tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; |
| 339 | } |
| 340 | |
| 341 | return tot_size >> PAGE_SHIFT; |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * vmw_mob_create - Create a mob, but don't populate it. |
| 346 | * |
| 347 | * @data_pages: Number of data pages of the underlying buffer object. |
| 348 | */ |
| 349 | struct vmw_mob *vmw_mob_create(unsigned long data_pages) |
| 350 | { |
| 351 | struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); |
| 352 | |
| 353 | if (unlikely(mob == NULL)) |
| 354 | return NULL; |
| 355 | |
| 356 | mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); |
| 357 | |
| 358 | return mob; |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * vmw_mob_pt_populate - Populate the mob pagetable |
| 363 | * |
| 364 | * @mob: Pointer to the mob the pagetable of which we want to |
| 365 | * populate. |
| 366 | * |
| 367 | * This function allocates memory to be used for the pagetable, and |
| 368 | * adjusts TTM memory accounting accordingly. Returns ENOMEM if |
| 369 | * memory resources aren't sufficient and may cause TTM buffer objects |
| 370 | * to be swapped out by using the TTM memory accounting function. |
| 371 | */ |
| 372 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, |
| 373 | struct vmw_mob *mob) |
| 374 | { |
| 375 | int ret; |
| 376 | BUG_ON(mob->pt_bo != NULL); |
| 377 | |
| 378 | ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, |
| 379 | ttm_bo_type_device, |
| 380 | &vmw_sys_ne_placement, |
| 381 | 0, false, NULL, &mob->pt_bo); |
| 382 | if (unlikely(ret != 0)) |
| 383 | return ret; |
| 384 | |
| 385 | ret = ttm_bo_reserve(mob->pt_bo, false, true, false, false); |
| 386 | |
| 387 | BUG_ON(ret != 0); |
| 388 | ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 389 | if (unlikely(ret != 0)) |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 390 | goto out_unreserve; |
| 391 | ret = vmw_bo_map_dma(mob->pt_bo); |
| 392 | if (unlikely(ret != 0)) |
| 393 | goto out_unreserve; |
| 394 | |
| 395 | ttm_bo_unreserve(mob->pt_bo); |
| 396 | |
| 397 | return 0; |
| 398 | |
| 399 | out_unreserve: |
| 400 | ttm_bo_unreserve(mob->pt_bo); |
| 401 | ttm_bo_unref(&mob->pt_bo); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 402 | |
| 403 | return ret; |
| 404 | } |
| 405 | |
| 406 | |
| 407 | /* |
| 408 | * vmw_mob_build_pt - Build a pagetable |
| 409 | * |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 410 | * @data_addr: Array of DMA addresses to the underlying buffer |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 411 | * object's data pages. |
| 412 | * @num_data_pages: Number of buffer object data pages. |
| 413 | * @pt_pages: Array of page pointers to the page table pages. |
| 414 | * |
| 415 | * Returns the number of page table pages actually used. |
| 416 | * Uses atomic kmaps of highmem pages to avoid TLB thrashing. |
| 417 | */ |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 418 | static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 419 | unsigned long num_data_pages, |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 420 | struct vmw_piter *pt_iter) |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 421 | { |
| 422 | unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; |
| 423 | unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 424 | unsigned long pt_page; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 425 | uint32_t *addr, *save_addr; |
| 426 | unsigned long i; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 427 | struct page *page; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 428 | |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 429 | for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 430 | page = vmw_piter_page(pt_iter); |
| 431 | |
| 432 | save_addr = addr = kmap_atomic(page); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 433 | |
| 434 | for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 435 | u32 tmp = vmw_piter_dma_addr(data_iter) >> PAGE_SHIFT; |
| 436 | *addr++ = tmp; |
| 437 | if (unlikely(--num_data_pages == 0)) |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 438 | break; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 439 | WARN_ON(!vmw_piter_next(data_iter)); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 440 | } |
| 441 | kunmap_atomic(save_addr); |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 442 | vmw_piter_next(pt_iter); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | return num_pt_pages; |
| 446 | } |
| 447 | |
| 448 | /* |
| 449 | * vmw_mob_build_pt - Set up a multilevel mob pagetable |
| 450 | * |
| 451 | * @mob: Pointer to a mob whose page table needs setting up. |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 452 | * @data_addr Array of DMA addresses to the buffer object's data |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 453 | * pages. |
| 454 | * @num_data_pages: Number of buffer object data pages. |
| 455 | * |
| 456 | * Uses tail recursion to set up a multilevel mob page table. |
| 457 | */ |
| 458 | static void vmw_mob_pt_setup(struct vmw_mob *mob, |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 459 | struct vmw_piter data_iter, |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 460 | unsigned long num_data_pages) |
| 461 | { |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 462 | unsigned long num_pt_pages = 0; |
| 463 | struct ttm_buffer_object *bo = mob->pt_bo; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 464 | struct vmw_piter save_pt_iter; |
| 465 | struct vmw_piter pt_iter; |
| 466 | const struct vmw_sg_table *vsgt; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 467 | int ret; |
| 468 | |
| 469 | ret = ttm_bo_reserve(bo, false, true, false, 0); |
| 470 | BUG_ON(ret != 0); |
| 471 | |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 472 | vsgt = vmw_bo_sg_table(bo); |
| 473 | vmw_piter_start(&pt_iter, vsgt, 0); |
| 474 | BUG_ON(!vmw_piter_next(&pt_iter)); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 475 | mob->pt_level = 0; |
| 476 | while (likely(num_data_pages > 1)) { |
| 477 | ++mob->pt_level; |
| 478 | BUG_ON(mob->pt_level > 2); |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 479 | save_pt_iter = pt_iter; |
| 480 | num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, |
| 481 | &pt_iter); |
| 482 | data_iter = save_pt_iter; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 483 | num_data_pages = num_pt_pages; |
| 484 | } |
| 485 | |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 486 | mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 487 | ttm_bo_unreserve(bo); |
| 488 | } |
| 489 | |
| 490 | /* |
| 491 | * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. |
| 492 | * |
| 493 | * @mob: Pointer to a mob to destroy. |
| 494 | */ |
| 495 | void vmw_mob_destroy(struct vmw_mob *mob) |
| 496 | { |
| 497 | if (mob->pt_bo) |
| 498 | ttm_bo_unref(&mob->pt_bo); |
| 499 | kfree(mob); |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * vmw_mob_unbind - Hide a mob from the device. |
| 504 | * |
| 505 | * @dev_priv: Pointer to a device private. |
| 506 | * @mob_id: Device id of the mob to unbind. |
| 507 | */ |
| 508 | void vmw_mob_unbind(struct vmw_private *dev_priv, |
| 509 | struct vmw_mob *mob) |
| 510 | { |
| 511 | struct { |
| 512 | SVGA3dCmdHeader header; |
| 513 | SVGA3dCmdDestroyGBMob body; |
| 514 | } *cmd; |
| 515 | int ret; |
| 516 | struct ttm_buffer_object *bo = mob->pt_bo; |
| 517 | |
| 518 | if (bo) { |
| 519 | ret = ttm_bo_reserve(bo, false, true, false, 0); |
| 520 | /* |
| 521 | * Noone else should be using this buffer. |
| 522 | */ |
| 523 | BUG_ON(ret != 0); |
| 524 | } |
| 525 | |
| 526 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); |
| 527 | if (unlikely(cmd == NULL)) { |
| 528 | DRM_ERROR("Failed reserving FIFO space for Memory " |
| 529 | "Object unbinding.\n"); |
| 530 | } |
| 531 | cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; |
| 532 | cmd->header.size = sizeof(cmd->body); |
| 533 | cmd->body.mobid = mob->id; |
| 534 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); |
| 535 | if (bo) { |
| 536 | vmw_fence_single_bo(bo, NULL); |
| 537 | ttm_bo_unreserve(bo); |
| 538 | } |
| 539 | vmw_3d_resource_dec(dev_priv, false); |
| 540 | } |
| 541 | |
| 542 | /* |
| 543 | * vmw_mob_bind - Make a mob visible to the device after first |
| 544 | * populating it if necessary. |
| 545 | * |
| 546 | * @dev_priv: Pointer to a device private. |
| 547 | * @mob: Pointer to the mob we're making visible. |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 548 | * @data_addr: Array of DMA addresses to the data pages of the underlying |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 549 | * buffer object. |
| 550 | * @num_data_pages: Number of data pages of the underlying buffer |
| 551 | * object. |
| 552 | * @mob_id: Device id of the mob to bind |
| 553 | * |
| 554 | * This function is intended to be interfaced with the ttm_tt backend |
| 555 | * code. |
| 556 | */ |
| 557 | int vmw_mob_bind(struct vmw_private *dev_priv, |
| 558 | struct vmw_mob *mob, |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 559 | const struct vmw_sg_table *vsgt, |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 560 | unsigned long num_data_pages, |
| 561 | int32_t mob_id) |
| 562 | { |
| 563 | int ret; |
| 564 | bool pt_set_up = false; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 565 | struct vmw_piter data_iter; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 566 | struct { |
| 567 | SVGA3dCmdHeader header; |
| 568 | SVGA3dCmdDefineGBMob body; |
| 569 | } *cmd; |
| 570 | |
| 571 | mob->id = mob_id; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 572 | vmw_piter_start(&data_iter, vsgt, 0); |
| 573 | if (unlikely(!vmw_piter_next(&data_iter))) |
| 574 | return 0; |
| 575 | |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 576 | if (likely(num_data_pages == 1)) { |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 577 | mob->pt_level = SVGA3D_MOBFMT_PTDEPTH_0; |
| 578 | mob->pt_root_page = vmw_piter_dma_addr(&data_iter); |
| 579 | } else if (vsgt->num_regions == 1) { |
| 580 | mob->pt_level = SVGA3D_MOBFMT_RANGE; |
| 581 | mob->pt_root_page = vmw_piter_dma_addr(&data_iter); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 582 | } else if (unlikely(mob->pt_bo == NULL)) { |
| 583 | ret = vmw_mob_pt_populate(dev_priv, mob); |
| 584 | if (unlikely(ret != 0)) |
| 585 | return ret; |
| 586 | |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 587 | vmw_mob_pt_setup(mob, data_iter, num_data_pages); |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 588 | pt_set_up = true; |
| 589 | } |
| 590 | |
| 591 | (void) vmw_3d_resource_inc(dev_priv, false); |
| 592 | |
| 593 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); |
| 594 | if (unlikely(cmd == NULL)) { |
| 595 | DRM_ERROR("Failed reserving FIFO space for Memory " |
| 596 | "Object binding.\n"); |
| 597 | goto out_no_cmd_space; |
| 598 | } |
| 599 | |
| 600 | cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB; |
| 601 | cmd->header.size = sizeof(cmd->body); |
| 602 | cmd->body.mobid = mob_id; |
| 603 | cmd->body.ptDepth = mob->pt_level; |
Thomas Hellstrom | 0fd53cf | 2013-10-24 13:27:38 -0700 | [diff] [blame] | 604 | cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; |
Thomas Hellstrom | 3530bdc | 2012-11-21 10:49:52 +0100 | [diff] [blame] | 605 | cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; |
| 606 | |
| 607 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); |
| 608 | |
| 609 | return 0; |
| 610 | |
| 611 | out_no_cmd_space: |
| 612 | vmw_3d_resource_dec(dev_priv, false); |
| 613 | if (pt_set_up) |
| 614 | ttm_bo_unref(&mob->pt_bo); |
| 615 | |
| 616 | return -ENOMEM; |
| 617 | } |