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3530bdc3 TH |
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 | ||
7cba9062 TH |
30 | /* |
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 | ||
f2a0dcb1 TH |
36 | #ifdef CONFIG_64BIT |
37 | #define VMW_PPN_SIZE 8 | |
f2a0dcb1 TH |
38 | #define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH64_0 |
39 | #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH64_1 | |
40 | #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH64_2 | |
41 | #else | |
3530bdc3 | 42 | #define VMW_PPN_SIZE 4 |
f2a0dcb1 TH |
43 | #define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH_0 |
44 | #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH_1 | |
45 | #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH_2 | |
46 | #endif | |
3530bdc3 TH |
47 | |
48 | /* | |
49 | * struct vmw_mob - Structure containing page table and metadata for a | |
50 | * Guest Memory OBject. | |
51 | * | |
52 | * @num_pages Number of pages that make up the page table. | |
53 | * @pt_level The indirection level of the page table. 0-2. | |
0fd53cfb | 54 | * @pt_root_page DMA address of the level 0 page of the page table. |
3530bdc3 TH |
55 | */ |
56 | struct vmw_mob { | |
57 | struct ttm_buffer_object *pt_bo; | |
58 | unsigned long num_pages; | |
59 | unsigned pt_level; | |
0fd53cfb | 60 | dma_addr_t pt_root_page; |
3530bdc3 TH |
61 | uint32_t id; |
62 | }; | |
63 | ||
64 | /* | |
65 | * struct vmw_otable - Guest Memory OBject table metadata | |
66 | * | |
67 | * @size: Size of the table (page-aligned). | |
68 | * @page_table: Pointer to a struct vmw_mob holding the page table. | |
69 | */ | |
70 | struct vmw_otable { | |
71 | unsigned long size; | |
72 | struct vmw_mob *page_table; | |
73 | }; | |
74 | ||
75 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, | |
76 | struct vmw_mob *mob); | |
77 | static void vmw_mob_pt_setup(struct vmw_mob *mob, | |
0fd53cfb | 78 | struct vmw_piter data_iter, |
3530bdc3 TH |
79 | unsigned long num_data_pages); |
80 | ||
81 | /* | |
82 | * vmw_setup_otable_base - Issue an object table base setup command to | |
83 | * the device | |
84 | * | |
85 | * @dev_priv: Pointer to a device private structure | |
86 | * @type: Type of object table base | |
87 | * @offset Start of table offset into dev_priv::otable_bo | |
88 | * @otable Pointer to otable metadata; | |
89 | * | |
90 | * This function returns -ENOMEM if it fails to reserve fifo space, | |
91 | * and may block waiting for fifo space. | |
92 | */ | |
93 | static int vmw_setup_otable_base(struct vmw_private *dev_priv, | |
94 | SVGAOTableType type, | |
95 | unsigned long offset, | |
96 | struct vmw_otable *otable) | |
97 | { | |
98 | struct { | |
99 | SVGA3dCmdHeader header; | |
3e894a62 | 100 | SVGA3dCmdSetOTableBase64 body; |
3530bdc3 | 101 | } *cmd; |
3530bdc3 | 102 | struct vmw_mob *mob; |
0fd53cfb TH |
103 | const struct vmw_sg_table *vsgt; |
104 | struct vmw_piter iter; | |
3530bdc3 TH |
105 | int ret; |
106 | ||
107 | BUG_ON(otable->page_table != NULL); | |
108 | ||
0fd53cfb TH |
109 | vsgt = vmw_bo_sg_table(dev_priv->otable_bo); |
110 | vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT); | |
111 | WARN_ON(!vmw_piter_next(&iter)); | |
112 | ||
3530bdc3 TH |
113 | mob = vmw_mob_create(otable->size >> PAGE_SHIFT); |
114 | if (unlikely(mob == NULL)) { | |
115 | DRM_ERROR("Failed creating OTable page table.\n"); | |
116 | return -ENOMEM; | |
117 | } | |
118 | ||
119 | if (otable->size <= PAGE_SIZE) { | |
f2a0dcb1 | 120 | mob->pt_level = VMW_MOBFMT_PTDEPTH_0; |
0fd53cfb TH |
121 | mob->pt_root_page = vmw_piter_dma_addr(&iter); |
122 | } else if (vsgt->num_regions == 1) { | |
123 | mob->pt_level = SVGA3D_MOBFMT_RANGE; | |
124 | mob->pt_root_page = vmw_piter_dma_addr(&iter); | |
3530bdc3 TH |
125 | } else { |
126 | ret = vmw_mob_pt_populate(dev_priv, mob); | |
127 | if (unlikely(ret != 0)) | |
128 | goto out_no_populate; | |
129 | ||
0fd53cfb | 130 | vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT); |
f2a0dcb1 | 131 | mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; |
3530bdc3 TH |
132 | } |
133 | ||
134 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
135 | if (unlikely(cmd == NULL)) { | |
136 | DRM_ERROR("Failed reserving FIFO space for OTable setup.\n"); | |
cd9a21a8 | 137 | ret = -ENOMEM; |
3530bdc3 TH |
138 | goto out_no_fifo; |
139 | } | |
140 | ||
141 | memset(cmd, 0, sizeof(*cmd)); | |
3e894a62 | 142 | cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64; |
3530bdc3 TH |
143 | cmd->header.size = sizeof(cmd->body); |
144 | cmd->body.type = type; | |
3e894a62 | 145 | cmd->body.baseAddress = cpu_to_le64(mob->pt_root_page >> PAGE_SHIFT); |
3530bdc3 TH |
146 | cmd->body.sizeInBytes = otable->size; |
147 | cmd->body.validSizeInBytes = 0; | |
148 | cmd->body.ptDepth = mob->pt_level; | |
149 | ||
f2a0dcb1 TH |
150 | /* |
151 | * The device doesn't support this, But the otable size is | |
152 | * determined at compile-time, so this BUG shouldn't trigger | |
153 | * randomly. | |
154 | */ | |
155 | BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2); | |
156 | ||
3530bdc3 TH |
157 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); |
158 | otable->page_table = mob; | |
159 | ||
160 | return 0; | |
161 | ||
162 | out_no_fifo: | |
163 | out_no_populate: | |
164 | vmw_mob_destroy(mob); | |
165 | return ret; | |
166 | } | |
167 | ||
168 | /* | |
169 | * vmw_takedown_otable_base - Issue an object table base takedown command | |
170 | * to the device | |
171 | * | |
172 | * @dev_priv: Pointer to a device private structure | |
173 | * @type: Type of object table base | |
174 | * | |
175 | */ | |
176 | static void vmw_takedown_otable_base(struct vmw_private *dev_priv, | |
177 | SVGAOTableType type, | |
178 | struct vmw_otable *otable) | |
179 | { | |
180 | struct { | |
181 | SVGA3dCmdHeader header; | |
182 | SVGA3dCmdSetOTableBase body; | |
183 | } *cmd; | |
3e894a62 | 184 | struct ttm_buffer_object *bo; |
3530bdc3 TH |
185 | |
186 | if (otable->page_table == NULL) | |
187 | return; | |
188 | ||
3e894a62 | 189 | bo = otable->page_table->pt_bo; |
3530bdc3 | 190 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); |
6950e23e AK |
191 | if (unlikely(cmd == NULL)) { |
192 | DRM_ERROR("Failed reserving FIFO space for OTable " | |
193 | "takedown.\n"); | |
194 | } else { | |
195 | memset(cmd, 0, sizeof(*cmd)); | |
196 | cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; | |
197 | cmd->header.size = sizeof(cmd->body); | |
198 | cmd->body.type = type; | |
199 | cmd->body.baseAddress = 0; | |
200 | cmd->body.sizeInBytes = 0; | |
201 | cmd->body.validSizeInBytes = 0; | |
202 | cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID; | |
203 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
204 | } | |
3530bdc3 TH |
205 | |
206 | if (bo) { | |
207 | int ret; | |
208 | ||
3e894a62 | 209 | ret = ttm_bo_reserve(bo, false, true, false, NULL); |
3530bdc3 TH |
210 | BUG_ON(ret != 0); |
211 | ||
212 | vmw_fence_single_bo(bo, NULL); | |
213 | ttm_bo_unreserve(bo); | |
214 | } | |
215 | ||
216 | vmw_mob_destroy(otable->page_table); | |
217 | otable->page_table = NULL; | |
218 | } | |
219 | ||
220 | /* | |
221 | * vmw_otables_setup - Set up guest backed memory object tables | |
222 | * | |
223 | * @dev_priv: Pointer to a device private structure | |
224 | * | |
225 | * Takes care of the device guest backed surface | |
226 | * initialization, by setting up the guest backed memory object tables. | |
227 | * Returns 0 on success and various error codes on failure. A succesful return | |
228 | * means the object tables can be taken down using the vmw_otables_takedown | |
229 | * function. | |
230 | */ | |
231 | int vmw_otables_setup(struct vmw_private *dev_priv) | |
232 | { | |
233 | unsigned long offset; | |
234 | unsigned long bo_size; | |
235 | struct vmw_otable *otables; | |
236 | SVGAOTableType i; | |
237 | int ret; | |
238 | ||
7cba9062 | 239 | otables = kzalloc(SVGA_OTABLE_DX9_MAX * sizeof(*otables), |
3530bdc3 TH |
240 | GFP_KERNEL); |
241 | if (unlikely(otables == NULL)) { | |
242 | DRM_ERROR("Failed to allocate space for otable " | |
243 | "metadata.\n"); | |
244 | return -ENOMEM; | |
245 | } | |
246 | ||
247 | otables[SVGA_OTABLE_MOB].size = | |
248 | VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE; | |
249 | otables[SVGA_OTABLE_SURFACE].size = | |
250 | VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE; | |
251 | otables[SVGA_OTABLE_CONTEXT].size = | |
252 | VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE; | |
253 | otables[SVGA_OTABLE_SHADER].size = | |
254 | VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE; | |
7cba9062 TH |
255 | otables[SVGA_OTABLE_SCREEN_TARGET].size = |
256 | VMWGFX_NUM_GB_SCREEN_TARGET * | |
257 | SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE; | |
3530bdc3 TH |
258 | |
259 | bo_size = 0; | |
7cba9062 | 260 | for (i = 0; i < SVGA_OTABLE_DX9_MAX; ++i) { |
3530bdc3 TH |
261 | otables[i].size = |
262 | (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK; | |
263 | bo_size += otables[i].size; | |
264 | } | |
265 | ||
266 | ret = ttm_bo_create(&dev_priv->bdev, bo_size, | |
267 | ttm_bo_type_device, | |
268 | &vmw_sys_ne_placement, | |
269 | 0, false, NULL, | |
270 | &dev_priv->otable_bo); | |
271 | ||
272 | if (unlikely(ret != 0)) | |
273 | goto out_no_bo; | |
274 | ||
3e894a62 | 275 | ret = ttm_bo_reserve(dev_priv->otable_bo, false, true, false, NULL); |
3530bdc3 TH |
276 | BUG_ON(ret != 0); |
277 | ret = vmw_bo_driver.ttm_tt_populate(dev_priv->otable_bo->ttm); | |
3530bdc3 | 278 | if (unlikely(ret != 0)) |
0fd53cfb TH |
279 | goto out_unreserve; |
280 | ret = vmw_bo_map_dma(dev_priv->otable_bo); | |
281 | if (unlikely(ret != 0)) | |
282 | goto out_unreserve; | |
283 | ||
284 | ttm_bo_unreserve(dev_priv->otable_bo); | |
3530bdc3 TH |
285 | |
286 | offset = 0; | |
7cba9062 | 287 | for (i = 0; i < SVGA_OTABLE_DX9_MAX - VMW_OTABLE_SETUP_SUB; ++i) { |
3530bdc3 TH |
288 | ret = vmw_setup_otable_base(dev_priv, i, offset, |
289 | &otables[i]); | |
290 | if (unlikely(ret != 0)) | |
291 | goto out_no_setup; | |
292 | offset += otables[i].size; | |
293 | } | |
294 | ||
295 | dev_priv->otables = otables; | |
296 | return 0; | |
297 | ||
0fd53cfb TH |
298 | out_unreserve: |
299 | ttm_bo_unreserve(dev_priv->otable_bo); | |
3530bdc3 | 300 | out_no_setup: |
7cba9062 | 301 | for (i = 0; i < SVGA_OTABLE_DX9_MAX - VMW_OTABLE_SETUP_SUB; ++i) |
3530bdc3 TH |
302 | vmw_takedown_otable_base(dev_priv, i, &otables[i]); |
303 | ||
304 | ttm_bo_unref(&dev_priv->otable_bo); | |
305 | out_no_bo: | |
306 | kfree(otables); | |
307 | return ret; | |
308 | } | |
309 | ||
310 | ||
311 | /* | |
312 | * vmw_otables_takedown - Take down guest backed memory object tables | |
313 | * | |
314 | * @dev_priv: Pointer to a device private structure | |
315 | * | |
316 | * Take down the Guest Memory Object tables. | |
317 | */ | |
318 | void vmw_otables_takedown(struct vmw_private *dev_priv) | |
319 | { | |
320 | SVGAOTableType i; | |
321 | struct ttm_buffer_object *bo = dev_priv->otable_bo; | |
322 | int ret; | |
323 | ||
7cba9062 | 324 | for (i = 0; i < SVGA_OTABLE_DX9_MAX - VMW_OTABLE_SETUP_SUB; ++i) |
3530bdc3 TH |
325 | vmw_takedown_otable_base(dev_priv, i, |
326 | &dev_priv->otables[i]); | |
327 | ||
3e894a62 | 328 | ret = ttm_bo_reserve(bo, false, true, false, NULL); |
3530bdc3 TH |
329 | BUG_ON(ret != 0); |
330 | ||
331 | vmw_fence_single_bo(bo, NULL); | |
332 | ttm_bo_unreserve(bo); | |
333 | ||
334 | ttm_bo_unref(&dev_priv->otable_bo); | |
335 | kfree(dev_priv->otables); | |
336 | dev_priv->otables = NULL; | |
337 | } | |
338 | ||
339 | ||
340 | /* | |
341 | * vmw_mob_calculate_pt_pages - Calculate the number of page table pages | |
342 | * needed for a guest backed memory object. | |
343 | * | |
344 | * @data_pages: Number of data pages in the memory object buffer. | |
345 | */ | |
346 | static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) | |
347 | { | |
348 | unsigned long data_size = data_pages * PAGE_SIZE; | |
349 | unsigned long tot_size = 0; | |
350 | ||
351 | while (likely(data_size > PAGE_SIZE)) { | |
352 | data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); | |
353 | data_size *= VMW_PPN_SIZE; | |
354 | tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; | |
355 | } | |
356 | ||
357 | return tot_size >> PAGE_SHIFT; | |
358 | } | |
359 | ||
360 | /* | |
361 | * vmw_mob_create - Create a mob, but don't populate it. | |
362 | * | |
363 | * @data_pages: Number of data pages of the underlying buffer object. | |
364 | */ | |
365 | struct vmw_mob *vmw_mob_create(unsigned long data_pages) | |
366 | { | |
367 | struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); | |
368 | ||
369 | if (unlikely(mob == NULL)) | |
370 | return NULL; | |
371 | ||
372 | mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); | |
373 | ||
374 | return mob; | |
375 | } | |
376 | ||
377 | /* | |
378 | * vmw_mob_pt_populate - Populate the mob pagetable | |
379 | * | |
380 | * @mob: Pointer to the mob the pagetable of which we want to | |
381 | * populate. | |
382 | * | |
383 | * This function allocates memory to be used for the pagetable, and | |
384 | * adjusts TTM memory accounting accordingly. Returns ENOMEM if | |
385 | * memory resources aren't sufficient and may cause TTM buffer objects | |
386 | * to be swapped out by using the TTM memory accounting function. | |
387 | */ | |
388 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, | |
389 | struct vmw_mob *mob) | |
390 | { | |
391 | int ret; | |
392 | BUG_ON(mob->pt_bo != NULL); | |
393 | ||
394 | ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, | |
395 | ttm_bo_type_device, | |
396 | &vmw_sys_ne_placement, | |
397 | 0, false, NULL, &mob->pt_bo); | |
398 | if (unlikely(ret != 0)) | |
399 | return ret; | |
400 | ||
3e894a62 | 401 | ret = ttm_bo_reserve(mob->pt_bo, false, true, false, NULL); |
3530bdc3 TH |
402 | |
403 | BUG_ON(ret != 0); | |
404 | ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm); | |
3530bdc3 | 405 | if (unlikely(ret != 0)) |
0fd53cfb TH |
406 | goto out_unreserve; |
407 | ret = vmw_bo_map_dma(mob->pt_bo); | |
408 | if (unlikely(ret != 0)) | |
409 | goto out_unreserve; | |
410 | ||
411 | ttm_bo_unreserve(mob->pt_bo); | |
412 | ||
413 | return 0; | |
414 | ||
415 | out_unreserve: | |
416 | ttm_bo_unreserve(mob->pt_bo); | |
417 | ttm_bo_unref(&mob->pt_bo); | |
3530bdc3 TH |
418 | |
419 | return ret; | |
420 | } | |
421 | ||
f2a0dcb1 TH |
422 | /** |
423 | * vmw_mob_assign_ppn - Assign a value to a page table entry | |
424 | * | |
425 | * @addr: Pointer to pointer to page table entry. | |
426 | * @val: The page table entry | |
427 | * | |
428 | * Assigns a value to a page table entry pointed to by *@addr and increments | |
429 | * *@addr according to the page table entry size. | |
430 | */ | |
431 | #if (VMW_PPN_SIZE == 8) | |
3e894a62 | 432 | static void vmw_mob_assign_ppn(__le32 **addr, dma_addr_t val) |
f2a0dcb1 | 433 | { |
3e894a62 | 434 | *((__le64 *) *addr) = cpu_to_le64(val >> PAGE_SHIFT); |
f2a0dcb1 TH |
435 | *addr += 2; |
436 | } | |
437 | #else | |
3e894a62 | 438 | static void vmw_mob_assign_ppn(__le32 **addr, dma_addr_t val) |
f2a0dcb1 | 439 | { |
3e894a62 | 440 | *(*addr)++ = cpu_to_le32(val >> PAGE_SHIFT); |
f2a0dcb1 TH |
441 | } |
442 | #endif | |
3530bdc3 TH |
443 | |
444 | /* | |
445 | * vmw_mob_build_pt - Build a pagetable | |
446 | * | |
0fd53cfb | 447 | * @data_addr: Array of DMA addresses to the underlying buffer |
3530bdc3 TH |
448 | * object's data pages. |
449 | * @num_data_pages: Number of buffer object data pages. | |
450 | * @pt_pages: Array of page pointers to the page table pages. | |
451 | * | |
452 | * Returns the number of page table pages actually used. | |
453 | * Uses atomic kmaps of highmem pages to avoid TLB thrashing. | |
454 | */ | |
0fd53cfb | 455 | static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, |
3530bdc3 | 456 | unsigned long num_data_pages, |
0fd53cfb | 457 | struct vmw_piter *pt_iter) |
3530bdc3 TH |
458 | { |
459 | unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; | |
460 | unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); | |
0fd53cfb | 461 | unsigned long pt_page; |
3e894a62 | 462 | __le32 *addr, *save_addr; |
3530bdc3 | 463 | unsigned long i; |
0fd53cfb | 464 | struct page *page; |
3530bdc3 | 465 | |
3530bdc3 | 466 | for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { |
0fd53cfb TH |
467 | page = vmw_piter_page(pt_iter); |
468 | ||
469 | save_addr = addr = kmap_atomic(page); | |
3530bdc3 TH |
470 | |
471 | for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { | |
f2a0dcb1 TH |
472 | vmw_mob_assign_ppn(&addr, |
473 | vmw_piter_dma_addr(data_iter)); | |
0fd53cfb | 474 | if (unlikely(--num_data_pages == 0)) |
3530bdc3 | 475 | break; |
0fd53cfb | 476 | WARN_ON(!vmw_piter_next(data_iter)); |
3530bdc3 TH |
477 | } |
478 | kunmap_atomic(save_addr); | |
0fd53cfb | 479 | vmw_piter_next(pt_iter); |
3530bdc3 TH |
480 | } |
481 | ||
482 | return num_pt_pages; | |
483 | } | |
484 | ||
485 | /* | |
486 | * vmw_mob_build_pt - Set up a multilevel mob pagetable | |
487 | * | |
488 | * @mob: Pointer to a mob whose page table needs setting up. | |
0fd53cfb | 489 | * @data_addr Array of DMA addresses to the buffer object's data |
3530bdc3 TH |
490 | * pages. |
491 | * @num_data_pages: Number of buffer object data pages. | |
492 | * | |
493 | * Uses tail recursion to set up a multilevel mob page table. | |
494 | */ | |
495 | static void vmw_mob_pt_setup(struct vmw_mob *mob, | |
0fd53cfb | 496 | struct vmw_piter data_iter, |
3530bdc3 TH |
497 | unsigned long num_data_pages) |
498 | { | |
3530bdc3 TH |
499 | unsigned long num_pt_pages = 0; |
500 | struct ttm_buffer_object *bo = mob->pt_bo; | |
0fd53cfb TH |
501 | struct vmw_piter save_pt_iter; |
502 | struct vmw_piter pt_iter; | |
503 | const struct vmw_sg_table *vsgt; | |
3530bdc3 TH |
504 | int ret; |
505 | ||
3e894a62 | 506 | ret = ttm_bo_reserve(bo, false, true, false, NULL); |
3530bdc3 TH |
507 | BUG_ON(ret != 0); |
508 | ||
0fd53cfb TH |
509 | vsgt = vmw_bo_sg_table(bo); |
510 | vmw_piter_start(&pt_iter, vsgt, 0); | |
511 | BUG_ON(!vmw_piter_next(&pt_iter)); | |
3530bdc3 TH |
512 | mob->pt_level = 0; |
513 | while (likely(num_data_pages > 1)) { | |
514 | ++mob->pt_level; | |
515 | BUG_ON(mob->pt_level > 2); | |
0fd53cfb TH |
516 | save_pt_iter = pt_iter; |
517 | num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, | |
518 | &pt_iter); | |
519 | data_iter = save_pt_iter; | |
3530bdc3 TH |
520 | num_data_pages = num_pt_pages; |
521 | } | |
522 | ||
0fd53cfb | 523 | mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); |
3530bdc3 TH |
524 | ttm_bo_unreserve(bo); |
525 | } | |
526 | ||
527 | /* | |
528 | * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. | |
529 | * | |
530 | * @mob: Pointer to a mob to destroy. | |
531 | */ | |
532 | void vmw_mob_destroy(struct vmw_mob *mob) | |
533 | { | |
534 | if (mob->pt_bo) | |
535 | ttm_bo_unref(&mob->pt_bo); | |
536 | kfree(mob); | |
537 | } | |
538 | ||
539 | /* | |
540 | * vmw_mob_unbind - Hide a mob from the device. | |
541 | * | |
542 | * @dev_priv: Pointer to a device private. | |
543 | * @mob_id: Device id of the mob to unbind. | |
544 | */ | |
545 | void vmw_mob_unbind(struct vmw_private *dev_priv, | |
546 | struct vmw_mob *mob) | |
547 | { | |
548 | struct { | |
549 | SVGA3dCmdHeader header; | |
550 | SVGA3dCmdDestroyGBMob body; | |
551 | } *cmd; | |
552 | int ret; | |
553 | struct ttm_buffer_object *bo = mob->pt_bo; | |
554 | ||
555 | if (bo) { | |
3e894a62 | 556 | ret = ttm_bo_reserve(bo, false, true, false, NULL); |
3530bdc3 TH |
557 | /* |
558 | * Noone else should be using this buffer. | |
559 | */ | |
560 | BUG_ON(ret != 0); | |
561 | } | |
562 | ||
563 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
564 | if (unlikely(cmd == NULL)) { | |
565 | DRM_ERROR("Failed reserving FIFO space for Memory " | |
566 | "Object unbinding.\n"); | |
6950e23e AK |
567 | } else { |
568 | cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; | |
569 | cmd->header.size = sizeof(cmd->body); | |
570 | cmd->body.mobid = mob->id; | |
571 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
3530bdc3 | 572 | } |
3530bdc3 TH |
573 | if (bo) { |
574 | vmw_fence_single_bo(bo, NULL); | |
575 | ttm_bo_unreserve(bo); | |
576 | } | |
577 | vmw_3d_resource_dec(dev_priv, false); | |
578 | } | |
579 | ||
580 | /* | |
581 | * vmw_mob_bind - Make a mob visible to the device after first | |
582 | * populating it if necessary. | |
583 | * | |
584 | * @dev_priv: Pointer to a device private. | |
585 | * @mob: Pointer to the mob we're making visible. | |
0fd53cfb | 586 | * @data_addr: Array of DMA addresses to the data pages of the underlying |
3530bdc3 TH |
587 | * buffer object. |
588 | * @num_data_pages: Number of data pages of the underlying buffer | |
589 | * object. | |
590 | * @mob_id: Device id of the mob to bind | |
591 | * | |
592 | * This function is intended to be interfaced with the ttm_tt backend | |
593 | * code. | |
594 | */ | |
595 | int vmw_mob_bind(struct vmw_private *dev_priv, | |
596 | struct vmw_mob *mob, | |
0fd53cfb | 597 | const struct vmw_sg_table *vsgt, |
3530bdc3 TH |
598 | unsigned long num_data_pages, |
599 | int32_t mob_id) | |
600 | { | |
601 | int ret; | |
602 | bool pt_set_up = false; | |
0fd53cfb | 603 | struct vmw_piter data_iter; |
3530bdc3 TH |
604 | struct { |
605 | SVGA3dCmdHeader header; | |
3e894a62 | 606 | SVGA3dCmdDefineGBMob64 body; |
3530bdc3 TH |
607 | } *cmd; |
608 | ||
609 | mob->id = mob_id; | |
0fd53cfb TH |
610 | vmw_piter_start(&data_iter, vsgt, 0); |
611 | if (unlikely(!vmw_piter_next(&data_iter))) | |
612 | return 0; | |
613 | ||
3530bdc3 | 614 | if (likely(num_data_pages == 1)) { |
f2a0dcb1 | 615 | mob->pt_level = VMW_MOBFMT_PTDEPTH_0; |
0fd53cfb TH |
616 | mob->pt_root_page = vmw_piter_dma_addr(&data_iter); |
617 | } else if (vsgt->num_regions == 1) { | |
618 | mob->pt_level = SVGA3D_MOBFMT_RANGE; | |
619 | mob->pt_root_page = vmw_piter_dma_addr(&data_iter); | |
3530bdc3 TH |
620 | } else if (unlikely(mob->pt_bo == NULL)) { |
621 | ret = vmw_mob_pt_populate(dev_priv, mob); | |
622 | if (unlikely(ret != 0)) | |
623 | return ret; | |
624 | ||
0fd53cfb | 625 | vmw_mob_pt_setup(mob, data_iter, num_data_pages); |
3530bdc3 | 626 | pt_set_up = true; |
f2a0dcb1 | 627 | mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; |
3530bdc3 TH |
628 | } |
629 | ||
630 | (void) vmw_3d_resource_inc(dev_priv, false); | |
631 | ||
632 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
633 | if (unlikely(cmd == NULL)) { | |
634 | DRM_ERROR("Failed reserving FIFO space for Memory " | |
635 | "Object binding.\n"); | |
636 | goto out_no_cmd_space; | |
637 | } | |
638 | ||
3e894a62 | 639 | cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; |
3530bdc3 TH |
640 | cmd->header.size = sizeof(cmd->body); |
641 | cmd->body.mobid = mob_id; | |
642 | cmd->body.ptDepth = mob->pt_level; | |
3e894a62 | 643 | cmd->body.base = cpu_to_le64(mob->pt_root_page >> PAGE_SHIFT); |
3530bdc3 TH |
644 | cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; |
645 | ||
646 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
647 | ||
648 | return 0; | |
649 | ||
650 | out_no_cmd_space: | |
651 | vmw_3d_resource_dec(dev_priv, false); | |
652 | if (pt_set_up) | |
653 | ttm_bo_unref(&mob->pt_bo); | |
654 | ||
655 | return -ENOMEM; | |
656 | } |