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3530bdc3 TH |
1 | /************************************************************************** |
2 | * | |
54fbde8a | 3 | * Copyright © 2012-2015 VMware, Inc., Palo Alto, CA., USA |
3530bdc3 TH |
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 | ||
f89c6c32 | 34 | #define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE ? 0 : 1)) |
7cba9062 | 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 | */ | |
d80efd5c TH |
70 | static const struct vmw_otable pre_dx_tables[] = { |
71 | {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, | |
72 | {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, | |
73 | {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, | |
74 | {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, | |
75 | {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, | |
76 | NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE} | |
77 | }; | |
78 | ||
79 | static const struct vmw_otable dx_tables[] = { | |
80 | {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, | |
81 | {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, | |
82 | {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, | |
83 | {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, | |
84 | {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, | |
85 | NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE}, | |
86 | {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true}, | |
3530bdc3 TH |
87 | }; |
88 | ||
89 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, | |
90 | struct vmw_mob *mob); | |
91 | static void vmw_mob_pt_setup(struct vmw_mob *mob, | |
0fd53cfb | 92 | struct vmw_piter data_iter, |
3530bdc3 TH |
93 | unsigned long num_data_pages); |
94 | ||
95 | /* | |
96 | * vmw_setup_otable_base - Issue an object table base setup command to | |
97 | * the device | |
98 | * | |
99 | * @dev_priv: Pointer to a device private structure | |
100 | * @type: Type of object table base | |
101 | * @offset Start of table offset into dev_priv::otable_bo | |
102 | * @otable Pointer to otable metadata; | |
103 | * | |
104 | * This function returns -ENOMEM if it fails to reserve fifo space, | |
105 | * and may block waiting for fifo space. | |
106 | */ | |
107 | static int vmw_setup_otable_base(struct vmw_private *dev_priv, | |
108 | SVGAOTableType type, | |
d80efd5c | 109 | struct ttm_buffer_object *otable_bo, |
3530bdc3 TH |
110 | unsigned long offset, |
111 | struct vmw_otable *otable) | |
112 | { | |
113 | struct { | |
114 | SVGA3dCmdHeader header; | |
3e894a62 | 115 | SVGA3dCmdSetOTableBase64 body; |
3530bdc3 | 116 | } *cmd; |
3530bdc3 | 117 | struct vmw_mob *mob; |
0fd53cfb TH |
118 | const struct vmw_sg_table *vsgt; |
119 | struct vmw_piter iter; | |
3530bdc3 TH |
120 | int ret; |
121 | ||
122 | BUG_ON(otable->page_table != NULL); | |
123 | ||
d80efd5c | 124 | vsgt = vmw_bo_sg_table(otable_bo); |
0fd53cfb TH |
125 | vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT); |
126 | WARN_ON(!vmw_piter_next(&iter)); | |
127 | ||
3530bdc3 TH |
128 | mob = vmw_mob_create(otable->size >> PAGE_SHIFT); |
129 | if (unlikely(mob == NULL)) { | |
130 | DRM_ERROR("Failed creating OTable page table.\n"); | |
131 | return -ENOMEM; | |
132 | } | |
133 | ||
134 | if (otable->size <= PAGE_SIZE) { | |
f2a0dcb1 | 135 | mob->pt_level = VMW_MOBFMT_PTDEPTH_0; |
0fd53cfb TH |
136 | mob->pt_root_page = vmw_piter_dma_addr(&iter); |
137 | } else if (vsgt->num_regions == 1) { | |
138 | mob->pt_level = SVGA3D_MOBFMT_RANGE; | |
139 | mob->pt_root_page = vmw_piter_dma_addr(&iter); | |
3530bdc3 TH |
140 | } else { |
141 | ret = vmw_mob_pt_populate(dev_priv, mob); | |
142 | if (unlikely(ret != 0)) | |
143 | goto out_no_populate; | |
144 | ||
0fd53cfb | 145 | vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT); |
f2a0dcb1 | 146 | mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; |
3530bdc3 TH |
147 | } |
148 | ||
149 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
150 | if (unlikely(cmd == NULL)) { | |
151 | DRM_ERROR("Failed reserving FIFO space for OTable setup.\n"); | |
cd9a21a8 | 152 | ret = -ENOMEM; |
3530bdc3 TH |
153 | goto out_no_fifo; |
154 | } | |
155 | ||
156 | memset(cmd, 0, sizeof(*cmd)); | |
3e894a62 | 157 | cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64; |
3530bdc3 TH |
158 | cmd->header.size = sizeof(cmd->body); |
159 | cmd->body.type = type; | |
b9eb1a61 | 160 | cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT; |
3530bdc3 TH |
161 | cmd->body.sizeInBytes = otable->size; |
162 | cmd->body.validSizeInBytes = 0; | |
163 | cmd->body.ptDepth = mob->pt_level; | |
164 | ||
f2a0dcb1 TH |
165 | /* |
166 | * The device doesn't support this, But the otable size is | |
167 | * determined at compile-time, so this BUG shouldn't trigger | |
168 | * randomly. | |
169 | */ | |
170 | BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2); | |
171 | ||
3530bdc3 TH |
172 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); |
173 | otable->page_table = mob; | |
174 | ||
175 | return 0; | |
176 | ||
177 | out_no_fifo: | |
178 | out_no_populate: | |
179 | vmw_mob_destroy(mob); | |
180 | return ret; | |
181 | } | |
182 | ||
183 | /* | |
184 | * vmw_takedown_otable_base - Issue an object table base takedown command | |
185 | * to the device | |
186 | * | |
187 | * @dev_priv: Pointer to a device private structure | |
188 | * @type: Type of object table base | |
189 | * | |
190 | */ | |
191 | static void vmw_takedown_otable_base(struct vmw_private *dev_priv, | |
192 | SVGAOTableType type, | |
193 | struct vmw_otable *otable) | |
194 | { | |
195 | struct { | |
196 | SVGA3dCmdHeader header; | |
197 | SVGA3dCmdSetOTableBase body; | |
198 | } *cmd; | |
3e894a62 | 199 | struct ttm_buffer_object *bo; |
3530bdc3 TH |
200 | |
201 | if (otable->page_table == NULL) | |
202 | return; | |
203 | ||
3e894a62 | 204 | bo = otable->page_table->pt_bo; |
3530bdc3 | 205 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); |
6950e23e AK |
206 | if (unlikely(cmd == NULL)) { |
207 | DRM_ERROR("Failed reserving FIFO space for OTable " | |
208 | "takedown.\n"); | |
13eec7ea | 209 | return; |
6950e23e | 210 | } |
d80efd5c | 211 | |
13eec7ea TH |
212 | memset(cmd, 0, sizeof(*cmd)); |
213 | cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; | |
214 | cmd->header.size = sizeof(cmd->body); | |
215 | cmd->body.type = type; | |
216 | cmd->body.baseAddress = 0; | |
217 | cmd->body.sizeInBytes = 0; | |
218 | cmd->body.validSizeInBytes = 0; | |
219 | cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID; | |
220 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
3530bdc3 TH |
221 | |
222 | if (bo) { | |
223 | int ret; | |
224 | ||
dfd5e50e | 225 | ret = ttm_bo_reserve(bo, false, true, NULL); |
3530bdc3 TH |
226 | BUG_ON(ret != 0); |
227 | ||
228 | vmw_fence_single_bo(bo, NULL); | |
229 | ttm_bo_unreserve(bo); | |
230 | } | |
231 | ||
232 | vmw_mob_destroy(otable->page_table); | |
233 | otable->page_table = NULL; | |
234 | } | |
235 | ||
d80efd5c TH |
236 | |
237 | static int vmw_otable_batch_setup(struct vmw_private *dev_priv, | |
238 | struct vmw_otable_batch *batch) | |
3530bdc3 TH |
239 | { |
240 | unsigned long offset; | |
241 | unsigned long bo_size; | |
d80efd5c | 242 | struct vmw_otable *otables = batch->otables; |
3530bdc3 TH |
243 | SVGAOTableType i; |
244 | int ret; | |
245 | ||
3530bdc3 | 246 | bo_size = 0; |
d80efd5c TH |
247 | for (i = 0; i < batch->num_otables; ++i) { |
248 | if (!otables[i].enabled) | |
249 | continue; | |
250 | ||
3530bdc3 TH |
251 | otables[i].size = |
252 | (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK; | |
253 | bo_size += otables[i].size; | |
254 | } | |
255 | ||
256 | ret = ttm_bo_create(&dev_priv->bdev, bo_size, | |
257 | ttm_bo_type_device, | |
258 | &vmw_sys_ne_placement, | |
259 | 0, false, NULL, | |
d80efd5c | 260 | &batch->otable_bo); |
3530bdc3 TH |
261 | |
262 | if (unlikely(ret != 0)) | |
263 | goto out_no_bo; | |
264 | ||
dfd5e50e | 265 | ret = ttm_bo_reserve(batch->otable_bo, false, true, NULL); |
3530bdc3 | 266 | BUG_ON(ret != 0); |
d80efd5c | 267 | ret = vmw_bo_driver.ttm_tt_populate(batch->otable_bo->ttm); |
3530bdc3 | 268 | if (unlikely(ret != 0)) |
0fd53cfb | 269 | goto out_unreserve; |
d80efd5c | 270 | ret = vmw_bo_map_dma(batch->otable_bo); |
0fd53cfb TH |
271 | if (unlikely(ret != 0)) |
272 | goto out_unreserve; | |
273 | ||
d80efd5c | 274 | ttm_bo_unreserve(batch->otable_bo); |
3530bdc3 TH |
275 | |
276 | offset = 0; | |
d80efd5c TH |
277 | for (i = 0; i < batch->num_otables; ++i) { |
278 | if (!batch->otables[i].enabled) | |
279 | continue; | |
280 | ||
281 | ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo, | |
282 | offset, | |
3530bdc3 TH |
283 | &otables[i]); |
284 | if (unlikely(ret != 0)) | |
285 | goto out_no_setup; | |
286 | offset += otables[i].size; | |
287 | } | |
288 | ||
3530bdc3 TH |
289 | return 0; |
290 | ||
0fd53cfb | 291 | out_unreserve: |
d80efd5c | 292 | ttm_bo_unreserve(batch->otable_bo); |
3530bdc3 | 293 | out_no_setup: |
d80efd5c TH |
294 | for (i = 0; i < batch->num_otables; ++i) { |
295 | if (batch->otables[i].enabled) | |
296 | vmw_takedown_otable_base(dev_priv, i, | |
297 | &batch->otables[i]); | |
298 | } | |
3530bdc3 | 299 | |
d80efd5c | 300 | ttm_bo_unref(&batch->otable_bo); |
3530bdc3 | 301 | out_no_bo: |
3530bdc3 TH |
302 | return ret; |
303 | } | |
304 | ||
3530bdc3 | 305 | /* |
d80efd5c | 306 | * vmw_otables_setup - Set up guest backed memory object tables |
3530bdc3 TH |
307 | * |
308 | * @dev_priv: Pointer to a device private structure | |
309 | * | |
d80efd5c TH |
310 | * Takes care of the device guest backed surface |
311 | * initialization, by setting up the guest backed memory object tables. | |
312 | * Returns 0 on success and various error codes on failure. A successful return | |
313 | * means the object tables can be taken down using the vmw_otables_takedown | |
314 | * function. | |
3530bdc3 | 315 | */ |
d80efd5c TH |
316 | int vmw_otables_setup(struct vmw_private *dev_priv) |
317 | { | |
318 | struct vmw_otable **otables = &dev_priv->otable_batch.otables; | |
319 | int ret; | |
320 | ||
321 | if (dev_priv->has_dx) { | |
5d25fde2 | 322 | *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL); |
1a4adb05 | 323 | if (!(*otables)) |
d80efd5c TH |
324 | return -ENOMEM; |
325 | ||
d80efd5c TH |
326 | dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); |
327 | } else { | |
5d25fde2 SS |
328 | *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables), |
329 | GFP_KERNEL); | |
1a4adb05 | 330 | if (!(*otables)) |
d80efd5c TH |
331 | return -ENOMEM; |
332 | ||
d80efd5c TH |
333 | dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); |
334 | } | |
335 | ||
336 | ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); | |
337 | if (unlikely(ret != 0)) | |
338 | goto out_setup; | |
339 | ||
340 | return 0; | |
341 | ||
342 | out_setup: | |
343 | kfree(*otables); | |
344 | return ret; | |
345 | } | |
346 | ||
347 | static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, | |
348 | struct vmw_otable_batch *batch) | |
3530bdc3 TH |
349 | { |
350 | SVGAOTableType i; | |
d80efd5c | 351 | struct ttm_buffer_object *bo = batch->otable_bo; |
3530bdc3 TH |
352 | int ret; |
353 | ||
d80efd5c TH |
354 | for (i = 0; i < batch->num_otables; ++i) |
355 | if (batch->otables[i].enabled) | |
356 | vmw_takedown_otable_base(dev_priv, i, | |
357 | &batch->otables[i]); | |
3530bdc3 | 358 | |
dfd5e50e | 359 | ret = ttm_bo_reserve(bo, false, true, NULL); |
3530bdc3 TH |
360 | BUG_ON(ret != 0); |
361 | ||
362 | vmw_fence_single_bo(bo, NULL); | |
363 | ttm_bo_unreserve(bo); | |
364 | ||
d80efd5c | 365 | ttm_bo_unref(&batch->otable_bo); |
3530bdc3 TH |
366 | } |
367 | ||
d80efd5c TH |
368 | /* |
369 | * vmw_otables_takedown - Take down guest backed memory object tables | |
370 | * | |
371 | * @dev_priv: Pointer to a device private structure | |
372 | * | |
373 | * Take down the Guest Memory Object tables. | |
374 | */ | |
375 | void vmw_otables_takedown(struct vmw_private *dev_priv) | |
376 | { | |
377 | vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); | |
378 | kfree(dev_priv->otable_batch.otables); | |
379 | } | |
3530bdc3 TH |
380 | |
381 | /* | |
382 | * vmw_mob_calculate_pt_pages - Calculate the number of page table pages | |
383 | * needed for a guest backed memory object. | |
384 | * | |
385 | * @data_pages: Number of data pages in the memory object buffer. | |
386 | */ | |
387 | static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) | |
388 | { | |
389 | unsigned long data_size = data_pages * PAGE_SIZE; | |
390 | unsigned long tot_size = 0; | |
391 | ||
392 | while (likely(data_size > PAGE_SIZE)) { | |
393 | data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); | |
394 | data_size *= VMW_PPN_SIZE; | |
395 | tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; | |
396 | } | |
397 | ||
398 | return tot_size >> PAGE_SHIFT; | |
399 | } | |
400 | ||
401 | /* | |
402 | * vmw_mob_create - Create a mob, but don't populate it. | |
403 | * | |
404 | * @data_pages: Number of data pages of the underlying buffer object. | |
405 | */ | |
406 | struct vmw_mob *vmw_mob_create(unsigned long data_pages) | |
407 | { | |
408 | struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); | |
409 | ||
1a4adb05 | 410 | if (unlikely(!mob)) |
3530bdc3 TH |
411 | return NULL; |
412 | ||
413 | mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); | |
414 | ||
415 | return mob; | |
416 | } | |
417 | ||
418 | /* | |
419 | * vmw_mob_pt_populate - Populate the mob pagetable | |
420 | * | |
421 | * @mob: Pointer to the mob the pagetable of which we want to | |
422 | * populate. | |
423 | * | |
424 | * This function allocates memory to be used for the pagetable, and | |
425 | * adjusts TTM memory accounting accordingly. Returns ENOMEM if | |
426 | * memory resources aren't sufficient and may cause TTM buffer objects | |
427 | * to be swapped out by using the TTM memory accounting function. | |
428 | */ | |
429 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, | |
430 | struct vmw_mob *mob) | |
431 | { | |
432 | int ret; | |
433 | BUG_ON(mob->pt_bo != NULL); | |
434 | ||
435 | ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, | |
436 | ttm_bo_type_device, | |
437 | &vmw_sys_ne_placement, | |
438 | 0, false, NULL, &mob->pt_bo); | |
439 | if (unlikely(ret != 0)) | |
440 | return ret; | |
441 | ||
dfd5e50e | 442 | ret = ttm_bo_reserve(mob->pt_bo, false, true, NULL); |
3530bdc3 TH |
443 | |
444 | BUG_ON(ret != 0); | |
445 | ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm); | |
3530bdc3 | 446 | if (unlikely(ret != 0)) |
0fd53cfb TH |
447 | goto out_unreserve; |
448 | ret = vmw_bo_map_dma(mob->pt_bo); | |
449 | if (unlikely(ret != 0)) | |
450 | goto out_unreserve; | |
451 | ||
452 | ttm_bo_unreserve(mob->pt_bo); | |
d80efd5c | 453 | |
0fd53cfb TH |
454 | return 0; |
455 | ||
456 | out_unreserve: | |
457 | ttm_bo_unreserve(mob->pt_bo); | |
458 | ttm_bo_unref(&mob->pt_bo); | |
3530bdc3 TH |
459 | |
460 | return ret; | |
461 | } | |
462 | ||
f2a0dcb1 TH |
463 | /** |
464 | * vmw_mob_assign_ppn - Assign a value to a page table entry | |
465 | * | |
466 | * @addr: Pointer to pointer to page table entry. | |
467 | * @val: The page table entry | |
468 | * | |
469 | * Assigns a value to a page table entry pointed to by *@addr and increments | |
470 | * *@addr according to the page table entry size. | |
471 | */ | |
472 | #if (VMW_PPN_SIZE == 8) | |
b9eb1a61 | 473 | static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) |
f2a0dcb1 | 474 | { |
b9eb1a61 | 475 | *((u64 *) *addr) = val >> PAGE_SHIFT; |
f2a0dcb1 TH |
476 | *addr += 2; |
477 | } | |
478 | #else | |
b9eb1a61 | 479 | static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) |
f2a0dcb1 | 480 | { |
b9eb1a61 | 481 | *(*addr)++ = val >> PAGE_SHIFT; |
f2a0dcb1 TH |
482 | } |
483 | #endif | |
3530bdc3 TH |
484 | |
485 | /* | |
486 | * vmw_mob_build_pt - Build a pagetable | |
487 | * | |
0fd53cfb | 488 | * @data_addr: Array of DMA addresses to the underlying buffer |
3530bdc3 TH |
489 | * object's data pages. |
490 | * @num_data_pages: Number of buffer object data pages. | |
491 | * @pt_pages: Array of page pointers to the page table pages. | |
492 | * | |
493 | * Returns the number of page table pages actually used. | |
494 | * Uses atomic kmaps of highmem pages to avoid TLB thrashing. | |
495 | */ | |
0fd53cfb | 496 | static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, |
3530bdc3 | 497 | unsigned long num_data_pages, |
0fd53cfb | 498 | struct vmw_piter *pt_iter) |
3530bdc3 TH |
499 | { |
500 | unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; | |
501 | unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); | |
0fd53cfb | 502 | unsigned long pt_page; |
b9eb1a61 | 503 | u32 *addr, *save_addr; |
3530bdc3 | 504 | unsigned long i; |
0fd53cfb | 505 | struct page *page; |
3530bdc3 | 506 | |
3530bdc3 | 507 | for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { |
0fd53cfb TH |
508 | page = vmw_piter_page(pt_iter); |
509 | ||
510 | save_addr = addr = kmap_atomic(page); | |
3530bdc3 TH |
511 | |
512 | for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { | |
f2a0dcb1 TH |
513 | vmw_mob_assign_ppn(&addr, |
514 | vmw_piter_dma_addr(data_iter)); | |
0fd53cfb | 515 | if (unlikely(--num_data_pages == 0)) |
3530bdc3 | 516 | break; |
0fd53cfb | 517 | WARN_ON(!vmw_piter_next(data_iter)); |
3530bdc3 TH |
518 | } |
519 | kunmap_atomic(save_addr); | |
0fd53cfb | 520 | vmw_piter_next(pt_iter); |
3530bdc3 TH |
521 | } |
522 | ||
523 | return num_pt_pages; | |
524 | } | |
525 | ||
526 | /* | |
527 | * vmw_mob_build_pt - Set up a multilevel mob pagetable | |
528 | * | |
529 | * @mob: Pointer to a mob whose page table needs setting up. | |
0fd53cfb | 530 | * @data_addr Array of DMA addresses to the buffer object's data |
3530bdc3 TH |
531 | * pages. |
532 | * @num_data_pages: Number of buffer object data pages. | |
533 | * | |
534 | * Uses tail recursion to set up a multilevel mob page table. | |
535 | */ | |
536 | static void vmw_mob_pt_setup(struct vmw_mob *mob, | |
0fd53cfb | 537 | struct vmw_piter data_iter, |
3530bdc3 TH |
538 | unsigned long num_data_pages) |
539 | { | |
3530bdc3 TH |
540 | unsigned long num_pt_pages = 0; |
541 | struct ttm_buffer_object *bo = mob->pt_bo; | |
0fd53cfb TH |
542 | struct vmw_piter save_pt_iter; |
543 | struct vmw_piter pt_iter; | |
544 | const struct vmw_sg_table *vsgt; | |
3530bdc3 TH |
545 | int ret; |
546 | ||
dfd5e50e | 547 | ret = ttm_bo_reserve(bo, false, true, NULL); |
3530bdc3 TH |
548 | BUG_ON(ret != 0); |
549 | ||
0fd53cfb TH |
550 | vsgt = vmw_bo_sg_table(bo); |
551 | vmw_piter_start(&pt_iter, vsgt, 0); | |
552 | BUG_ON(!vmw_piter_next(&pt_iter)); | |
3530bdc3 TH |
553 | mob->pt_level = 0; |
554 | while (likely(num_data_pages > 1)) { | |
555 | ++mob->pt_level; | |
556 | BUG_ON(mob->pt_level > 2); | |
0fd53cfb TH |
557 | save_pt_iter = pt_iter; |
558 | num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, | |
559 | &pt_iter); | |
560 | data_iter = save_pt_iter; | |
3530bdc3 TH |
561 | num_data_pages = num_pt_pages; |
562 | } | |
563 | ||
0fd53cfb | 564 | mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); |
3530bdc3 TH |
565 | ttm_bo_unreserve(bo); |
566 | } | |
567 | ||
568 | /* | |
569 | * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. | |
570 | * | |
571 | * @mob: Pointer to a mob to destroy. | |
572 | */ | |
573 | void vmw_mob_destroy(struct vmw_mob *mob) | |
574 | { | |
575 | if (mob->pt_bo) | |
576 | ttm_bo_unref(&mob->pt_bo); | |
577 | kfree(mob); | |
578 | } | |
579 | ||
580 | /* | |
581 | * vmw_mob_unbind - Hide a mob from the device. | |
582 | * | |
583 | * @dev_priv: Pointer to a device private. | |
584 | * @mob_id: Device id of the mob to unbind. | |
585 | */ | |
586 | void vmw_mob_unbind(struct vmw_private *dev_priv, | |
587 | struct vmw_mob *mob) | |
588 | { | |
589 | struct { | |
590 | SVGA3dCmdHeader header; | |
591 | SVGA3dCmdDestroyGBMob body; | |
592 | } *cmd; | |
593 | int ret; | |
594 | struct ttm_buffer_object *bo = mob->pt_bo; | |
595 | ||
596 | if (bo) { | |
dfd5e50e | 597 | ret = ttm_bo_reserve(bo, false, true, NULL); |
3530bdc3 TH |
598 | /* |
599 | * Noone else should be using this buffer. | |
600 | */ | |
601 | BUG_ON(ret != 0); | |
602 | } | |
603 | ||
604 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
605 | if (unlikely(cmd == NULL)) { | |
606 | DRM_ERROR("Failed reserving FIFO space for Memory " | |
607 | "Object unbinding.\n"); | |
6950e23e AK |
608 | } else { |
609 | cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; | |
610 | cmd->header.size = sizeof(cmd->body); | |
611 | cmd->body.mobid = mob->id; | |
612 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
3530bdc3 | 613 | } |
3530bdc3 TH |
614 | if (bo) { |
615 | vmw_fence_single_bo(bo, NULL); | |
616 | ttm_bo_unreserve(bo); | |
617 | } | |
153b3d5b | 618 | vmw_fifo_resource_dec(dev_priv); |
3530bdc3 TH |
619 | } |
620 | ||
621 | /* | |
622 | * vmw_mob_bind - Make a mob visible to the device after first | |
623 | * populating it if necessary. | |
624 | * | |
625 | * @dev_priv: Pointer to a device private. | |
626 | * @mob: Pointer to the mob we're making visible. | |
0fd53cfb | 627 | * @data_addr: Array of DMA addresses to the data pages of the underlying |
3530bdc3 TH |
628 | * buffer object. |
629 | * @num_data_pages: Number of data pages of the underlying buffer | |
630 | * object. | |
631 | * @mob_id: Device id of the mob to bind | |
632 | * | |
633 | * This function is intended to be interfaced with the ttm_tt backend | |
634 | * code. | |
635 | */ | |
636 | int vmw_mob_bind(struct vmw_private *dev_priv, | |
637 | struct vmw_mob *mob, | |
0fd53cfb | 638 | const struct vmw_sg_table *vsgt, |
3530bdc3 TH |
639 | unsigned long num_data_pages, |
640 | int32_t mob_id) | |
641 | { | |
642 | int ret; | |
643 | bool pt_set_up = false; | |
0fd53cfb | 644 | struct vmw_piter data_iter; |
3530bdc3 TH |
645 | struct { |
646 | SVGA3dCmdHeader header; | |
3e894a62 | 647 | SVGA3dCmdDefineGBMob64 body; |
3530bdc3 TH |
648 | } *cmd; |
649 | ||
650 | mob->id = mob_id; | |
0fd53cfb TH |
651 | vmw_piter_start(&data_iter, vsgt, 0); |
652 | if (unlikely(!vmw_piter_next(&data_iter))) | |
653 | return 0; | |
654 | ||
3530bdc3 | 655 | if (likely(num_data_pages == 1)) { |
f2a0dcb1 | 656 | mob->pt_level = VMW_MOBFMT_PTDEPTH_0; |
0fd53cfb TH |
657 | mob->pt_root_page = vmw_piter_dma_addr(&data_iter); |
658 | } else if (vsgt->num_regions == 1) { | |
659 | mob->pt_level = SVGA3D_MOBFMT_RANGE; | |
660 | mob->pt_root_page = vmw_piter_dma_addr(&data_iter); | |
3530bdc3 TH |
661 | } else if (unlikely(mob->pt_bo == NULL)) { |
662 | ret = vmw_mob_pt_populate(dev_priv, mob); | |
663 | if (unlikely(ret != 0)) | |
664 | return ret; | |
665 | ||
0fd53cfb | 666 | vmw_mob_pt_setup(mob, data_iter, num_data_pages); |
3530bdc3 | 667 | pt_set_up = true; |
f2a0dcb1 | 668 | mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; |
3530bdc3 TH |
669 | } |
670 | ||
153b3d5b | 671 | vmw_fifo_resource_inc(dev_priv); |
3530bdc3 TH |
672 | |
673 | cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); | |
674 | if (unlikely(cmd == NULL)) { | |
675 | DRM_ERROR("Failed reserving FIFO space for Memory " | |
676 | "Object binding.\n"); | |
677 | goto out_no_cmd_space; | |
678 | } | |
679 | ||
3e894a62 | 680 | cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; |
3530bdc3 TH |
681 | cmd->header.size = sizeof(cmd->body); |
682 | cmd->body.mobid = mob_id; | |
683 | cmd->body.ptDepth = mob->pt_level; | |
b9eb1a61 | 684 | cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; |
3530bdc3 TH |
685 | cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; |
686 | ||
687 | vmw_fifo_commit(dev_priv, sizeof(*cmd)); | |
688 | ||
689 | return 0; | |
690 | ||
691 | out_no_cmd_space: | |
153b3d5b | 692 | vmw_fifo_resource_dec(dev_priv); |
3530bdc3 TH |
693 | if (pt_set_up) |
694 | ttm_bo_unref(&mob->pt_bo); | |
695 | ||
696 | return -ENOMEM; | |
697 | } |