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dff96888 | 1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
3530bdc3 TH |
2 | /************************************************************************** |
3 | * | |
09881d29 | 4 | * Copyright 2012-2023 VMware, Inc., Palo Alto, CA., USA |
3530bdc3 TH |
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 | ||
09881d29 | 28 | #include "vmwgfx_bo.h" |
3530bdc3 TH |
29 | #include "vmwgfx_drv.h" |
30 | ||
09881d29 ZR |
31 | #include <linux/highmem.h> |
32 | ||
f2a0dcb1 TH |
33 | #ifdef CONFIG_64BIT |
34 | #define VMW_PPN_SIZE 8 | |
ebc9ac7c ZR |
35 | #define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PT64_0 |
36 | #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PT64_1 | |
37 | #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PT64_2 | |
f2a0dcb1 | 38 | #else |
3530bdc3 | 39 | #define VMW_PPN_SIZE 4 |
ebc9ac7c ZR |
40 | #define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PT_0 |
41 | #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PT_1 | |
42 | #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PT_2 | |
f2a0dcb1 | 43 | #endif |
3530bdc3 TH |
44 | |
45 | /* | |
46 | * struct vmw_mob - Structure containing page table and metadata for a | |
47 | * Guest Memory OBject. | |
48 | * | |
49 | * @num_pages Number of pages that make up the page table. | |
50 | * @pt_level The indirection level of the page table. 0-2. | |
0fd53cfb | 51 | * @pt_root_page DMA address of the level 0 page of the page table. |
3530bdc3 TH |
52 | */ |
53 | struct vmw_mob { | |
668b2066 | 54 | struct vmw_bo *pt_bo; |
3530bdc3 TH |
55 | unsigned long num_pages; |
56 | unsigned pt_level; | |
0fd53cfb | 57 | dma_addr_t pt_root_page; |
3530bdc3 TH |
58 | uint32_t id; |
59 | }; | |
60 | ||
61 | /* | |
62 | * struct vmw_otable - Guest Memory OBject table metadata | |
63 | * | |
64 | * @size: Size of the table (page-aligned). | |
65 | * @page_table: Pointer to a struct vmw_mob holding the page table. | |
66 | */ | |
d80efd5c | 67 | static const struct vmw_otable pre_dx_tables[] = { |
ebc9ac7c ZR |
68 | {VMWGFX_NUM_MOB * sizeof(SVGAOTableMobEntry), NULL, true}, |
69 | {VMWGFX_NUM_GB_SURFACE * sizeof(SVGAOTableSurfaceEntry), NULL, true}, | |
70 | {VMWGFX_NUM_GB_CONTEXT * sizeof(SVGAOTableContextEntry), NULL, true}, | |
71 | {VMWGFX_NUM_GB_SHADER * sizeof(SVGAOTableShaderEntry), NULL, true}, | |
72 | {VMWGFX_NUM_GB_SCREEN_TARGET * sizeof(SVGAOTableScreenTargetEntry), | |
11343099 | 73 | NULL, true} |
d80efd5c TH |
74 | }; |
75 | ||
76 | static const struct vmw_otable dx_tables[] = { | |
ebc9ac7c ZR |
77 | {VMWGFX_NUM_MOB * sizeof(SVGAOTableMobEntry), NULL, true}, |
78 | {VMWGFX_NUM_GB_SURFACE * sizeof(SVGAOTableSurfaceEntry), NULL, true}, | |
79 | {VMWGFX_NUM_GB_CONTEXT * sizeof(SVGAOTableContextEntry), NULL, true}, | |
80 | {VMWGFX_NUM_GB_SHADER * sizeof(SVGAOTableShaderEntry), NULL, true}, | |
81 | {VMWGFX_NUM_GB_SCREEN_TARGET * sizeof(SVGAOTableScreenTargetEntry), | |
11343099 | 82 | NULL, true}, |
d80efd5c | 83 | {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true}, |
3530bdc3 TH |
84 | }; |
85 | ||
86 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, | |
87 | struct vmw_mob *mob); | |
88 | static void vmw_mob_pt_setup(struct vmw_mob *mob, | |
0fd53cfb | 89 | struct vmw_piter data_iter, |
3530bdc3 TH |
90 | unsigned long num_data_pages); |
91 | ||
2ef4fb92 ZR |
92 | |
93 | static inline void vmw_bo_unpin_unlocked(struct ttm_buffer_object *bo) | |
94 | { | |
95 | int ret = ttm_bo_reserve(bo, false, true, NULL); | |
96 | BUG_ON(ret != 0); | |
97 | ttm_bo_unpin(bo); | |
98 | ttm_bo_unreserve(bo); | |
99 | } | |
100 | ||
101 | ||
3530bdc3 TH |
102 | /* |
103 | * vmw_setup_otable_base - Issue an object table base setup command to | |
104 | * the device | |
105 | * | |
106 | * @dev_priv: Pointer to a device private structure | |
107 | * @type: Type of object table base | |
108 | * @offset Start of table offset into dev_priv::otable_bo | |
109 | * @otable Pointer to otable metadata; | |
110 | * | |
111 | * This function returns -ENOMEM if it fails to reserve fifo space, | |
112 | * and may block waiting for fifo space. | |
113 | */ | |
114 | static int vmw_setup_otable_base(struct vmw_private *dev_priv, | |
115 | SVGAOTableType type, | |
d80efd5c | 116 | struct ttm_buffer_object *otable_bo, |
3530bdc3 TH |
117 | unsigned long offset, |
118 | struct vmw_otable *otable) | |
119 | { | |
120 | struct { | |
121 | SVGA3dCmdHeader header; | |
3e894a62 | 122 | SVGA3dCmdSetOTableBase64 body; |
3530bdc3 | 123 | } *cmd; |
3530bdc3 | 124 | struct vmw_mob *mob; |
0fd53cfb TH |
125 | const struct vmw_sg_table *vsgt; |
126 | struct vmw_piter iter; | |
3530bdc3 TH |
127 | int ret; |
128 | ||
129 | BUG_ON(otable->page_table != NULL); | |
130 | ||
d80efd5c | 131 | vsgt = vmw_bo_sg_table(otable_bo); |
0fd53cfb TH |
132 | vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT); |
133 | WARN_ON(!vmw_piter_next(&iter)); | |
134 | ||
3530bdc3 TH |
135 | mob = vmw_mob_create(otable->size >> PAGE_SHIFT); |
136 | if (unlikely(mob == NULL)) { | |
137 | DRM_ERROR("Failed creating OTable page table.\n"); | |
138 | return -ENOMEM; | |
139 | } | |
140 | ||
141 | if (otable->size <= PAGE_SIZE) { | |
f2a0dcb1 | 142 | mob->pt_level = VMW_MOBFMT_PTDEPTH_0; |
0fd53cfb | 143 | mob->pt_root_page = vmw_piter_dma_addr(&iter); |
3530bdc3 TH |
144 | } else { |
145 | ret = vmw_mob_pt_populate(dev_priv, mob); | |
146 | if (unlikely(ret != 0)) | |
147 | goto out_no_populate; | |
148 | ||
0fd53cfb | 149 | vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT); |
ebc9ac7c | 150 | mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PT_1; |
3530bdc3 TH |
151 | } |
152 | ||
8426ed9c | 153 | cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd)); |
3530bdc3 | 154 | if (unlikely(cmd == NULL)) { |
cd9a21a8 | 155 | ret = -ENOMEM; |
3530bdc3 TH |
156 | goto out_no_fifo; |
157 | } | |
158 | ||
159 | memset(cmd, 0, sizeof(*cmd)); | |
3e894a62 | 160 | cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64; |
3530bdc3 TH |
161 | cmd->header.size = sizeof(cmd->body); |
162 | cmd->body.type = type; | |
b9eb1a61 | 163 | cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT; |
3530bdc3 TH |
164 | cmd->body.sizeInBytes = otable->size; |
165 | cmd->body.validSizeInBytes = 0; | |
166 | cmd->body.ptDepth = mob->pt_level; | |
167 | ||
f2a0dcb1 TH |
168 | /* |
169 | * The device doesn't support this, But the otable size is | |
170 | * determined at compile-time, so this BUG shouldn't trigger | |
171 | * randomly. | |
172 | */ | |
173 | BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2); | |
174 | ||
8426ed9c | 175 | vmw_cmd_commit(dev_priv, sizeof(*cmd)); |
3530bdc3 TH |
176 | otable->page_table = mob; |
177 | ||
178 | return 0; | |
179 | ||
180 | out_no_fifo: | |
181 | out_no_populate: | |
182 | vmw_mob_destroy(mob); | |
183 | return ret; | |
184 | } | |
185 | ||
186 | /* | |
187 | * vmw_takedown_otable_base - Issue an object table base takedown command | |
188 | * to the device | |
189 | * | |
190 | * @dev_priv: Pointer to a device private structure | |
191 | * @type: Type of object table base | |
192 | * | |
193 | */ | |
194 | static void vmw_takedown_otable_base(struct vmw_private *dev_priv, | |
195 | SVGAOTableType type, | |
196 | struct vmw_otable *otable) | |
197 | { | |
198 | struct { | |
199 | SVGA3dCmdHeader header; | |
200 | SVGA3dCmdSetOTableBase body; | |
201 | } *cmd; | |
3e894a62 | 202 | struct ttm_buffer_object *bo; |
3530bdc3 TH |
203 | |
204 | if (otable->page_table == NULL) | |
205 | return; | |
206 | ||
668b2066 | 207 | bo = &otable->page_table->pt_bo->tbo; |
8426ed9c | 208 | cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd)); |
11c45419 | 209 | if (unlikely(cmd == NULL)) |
13eec7ea | 210 | return; |
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; | |
8426ed9c | 220 | vmw_cmd_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 | ||
e9431ea5 | 228 | vmw_bo_fence_single(bo, NULL); |
3530bdc3 TH |
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 | ||
bc65754c | 251 | otables[i].size = PFN_ALIGN(otables[i].size); |
3530bdc3 TH |
252 | bo_size += otables[i].size; |
253 | } | |
254 | ||
668b2066 ZR |
255 | ret = vmw_bo_create_and_populate(dev_priv, bo_size, |
256 | VMW_BO_DOMAIN_WAITABLE_SYS, | |
257 | &batch->otable_bo); | |
0fd53cfb | 258 | if (unlikely(ret != 0)) |
56dc01f1 | 259 | return ret; |
3530bdc3 TH |
260 | |
261 | offset = 0; | |
d80efd5c TH |
262 | for (i = 0; i < batch->num_otables; ++i) { |
263 | if (!batch->otables[i].enabled) | |
264 | continue; | |
265 | ||
668b2066 ZR |
266 | ret = vmw_setup_otable_base(dev_priv, i, |
267 | &batch->otable_bo->tbo, | |
d80efd5c | 268 | offset, |
3530bdc3 TH |
269 | &otables[i]); |
270 | if (unlikely(ret != 0)) | |
271 | goto out_no_setup; | |
272 | offset += otables[i].size; | |
273 | } | |
274 | ||
3530bdc3 TH |
275 | return 0; |
276 | ||
277 | out_no_setup: | |
d80efd5c TH |
278 | for (i = 0; i < batch->num_otables; ++i) { |
279 | if (batch->otables[i].enabled) | |
280 | vmw_takedown_otable_base(dev_priv, i, | |
281 | &batch->otables[i]); | |
282 | } | |
3530bdc3 | 283 | |
668b2066 ZR |
284 | vmw_bo_unpin_unlocked(&batch->otable_bo->tbo); |
285 | ttm_bo_put(&batch->otable_bo->tbo); | |
6034d9d4 | 286 | batch->otable_bo = NULL; |
3530bdc3 TH |
287 | return ret; |
288 | } | |
289 | ||
3530bdc3 | 290 | /* |
d80efd5c | 291 | * vmw_otables_setup - Set up guest backed memory object tables |
3530bdc3 TH |
292 | * |
293 | * @dev_priv: Pointer to a device private structure | |
294 | * | |
d80efd5c TH |
295 | * Takes care of the device guest backed surface |
296 | * initialization, by setting up the guest backed memory object tables. | |
297 | * Returns 0 on success and various error codes on failure. A successful return | |
298 | * means the object tables can be taken down using the vmw_otables_takedown | |
299 | * function. | |
3530bdc3 | 300 | */ |
d80efd5c TH |
301 | int vmw_otables_setup(struct vmw_private *dev_priv) |
302 | { | |
303 | struct vmw_otable **otables = &dev_priv->otable_batch.otables; | |
304 | int ret; | |
305 | ||
878c6ecd | 306 | if (has_sm4_context(dev_priv)) { |
5d25fde2 | 307 | *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL); |
1a4adb05 | 308 | if (!(*otables)) |
d80efd5c TH |
309 | return -ENOMEM; |
310 | ||
d80efd5c TH |
311 | dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); |
312 | } else { | |
5d25fde2 SS |
313 | *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables), |
314 | GFP_KERNEL); | |
1a4adb05 | 315 | if (!(*otables)) |
d80efd5c TH |
316 | return -ENOMEM; |
317 | ||
d80efd5c TH |
318 | dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); |
319 | } | |
320 | ||
321 | ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); | |
322 | if (unlikely(ret != 0)) | |
323 | goto out_setup; | |
324 | ||
325 | return 0; | |
326 | ||
327 | out_setup: | |
328 | kfree(*otables); | |
329 | return ret; | |
330 | } | |
331 | ||
332 | static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, | |
333 | struct vmw_otable_batch *batch) | |
3530bdc3 TH |
334 | { |
335 | SVGAOTableType i; | |
668b2066 | 336 | struct ttm_buffer_object *bo = &batch->otable_bo->tbo; |
3530bdc3 TH |
337 | int ret; |
338 | ||
d80efd5c TH |
339 | for (i = 0; i < batch->num_otables; ++i) |
340 | if (batch->otables[i].enabled) | |
341 | vmw_takedown_otable_base(dev_priv, i, | |
342 | &batch->otables[i]); | |
3530bdc3 | 343 | |
dfd5e50e | 344 | ret = ttm_bo_reserve(bo, false, true, NULL); |
3530bdc3 TH |
345 | BUG_ON(ret != 0); |
346 | ||
e9431ea5 | 347 | vmw_bo_fence_single(bo, NULL); |
2ef4fb92 | 348 | ttm_bo_unpin(bo); |
3530bdc3 TH |
349 | ttm_bo_unreserve(bo); |
350 | ||
668b2066 | 351 | vmw_bo_unreference(&batch->otable_bo); |
3530bdc3 TH |
352 | } |
353 | ||
d80efd5c TH |
354 | /* |
355 | * vmw_otables_takedown - Take down guest backed memory object tables | |
356 | * | |
357 | * @dev_priv: Pointer to a device private structure | |
358 | * | |
359 | * Take down the Guest Memory Object tables. | |
360 | */ | |
361 | void vmw_otables_takedown(struct vmw_private *dev_priv) | |
362 | { | |
363 | vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); | |
364 | kfree(dev_priv->otable_batch.otables); | |
365 | } | |
3530bdc3 TH |
366 | |
367 | /* | |
368 | * vmw_mob_calculate_pt_pages - Calculate the number of page table pages | |
369 | * needed for a guest backed memory object. | |
370 | * | |
371 | * @data_pages: Number of data pages in the memory object buffer. | |
372 | */ | |
373 | static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) | |
374 | { | |
375 | unsigned long data_size = data_pages * PAGE_SIZE; | |
376 | unsigned long tot_size = 0; | |
377 | ||
378 | while (likely(data_size > PAGE_SIZE)) { | |
379 | data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); | |
380 | data_size *= VMW_PPN_SIZE; | |
bc65754c | 381 | tot_size += PFN_ALIGN(data_size); |
3530bdc3 TH |
382 | } |
383 | ||
384 | return tot_size >> PAGE_SHIFT; | |
385 | } | |
386 | ||
387 | /* | |
388 | * vmw_mob_create - Create a mob, but don't populate it. | |
389 | * | |
390 | * @data_pages: Number of data pages of the underlying buffer object. | |
391 | */ | |
392 | struct vmw_mob *vmw_mob_create(unsigned long data_pages) | |
393 | { | |
394 | struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); | |
395 | ||
1a4adb05 | 396 | if (unlikely(!mob)) |
3530bdc3 TH |
397 | return NULL; |
398 | ||
399 | mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); | |
400 | ||
401 | return mob; | |
402 | } | |
403 | ||
404 | /* | |
405 | * vmw_mob_pt_populate - Populate the mob pagetable | |
406 | * | |
407 | * @mob: Pointer to the mob the pagetable of which we want to | |
408 | * populate. | |
409 | * | |
8aadeb8a ZR |
410 | * This function allocates memory to be used for the pagetable. |
411 | * Returns ENOMEM if memory resources aren't sufficient and may | |
412 | * cause TTM buffer objects to be swapped out. | |
3530bdc3 TH |
413 | */ |
414 | static int vmw_mob_pt_populate(struct vmw_private *dev_priv, | |
415 | struct vmw_mob *mob) | |
416 | { | |
3530bdc3 TH |
417 | BUG_ON(mob->pt_bo != NULL); |
418 | ||
668b2066 ZR |
419 | return vmw_bo_create_and_populate(dev_priv, mob->num_pages * PAGE_SIZE, |
420 | VMW_BO_DOMAIN_WAITABLE_SYS, | |
421 | &mob->pt_bo); | |
3530bdc3 TH |
422 | } |
423 | ||
f2a0dcb1 TH |
424 | /** |
425 | * vmw_mob_assign_ppn - Assign a value to a page table entry | |
426 | * | |
427 | * @addr: Pointer to pointer to page table entry. | |
428 | * @val: The page table entry | |
429 | * | |
430 | * Assigns a value to a page table entry pointed to by *@addr and increments | |
431 | * *@addr according to the page table entry size. | |
432 | */ | |
433 | #if (VMW_PPN_SIZE == 8) | |
b9eb1a61 | 434 | static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) |
f2a0dcb1 | 435 | { |
b9eb1a61 | 436 | *((u64 *) *addr) = val >> PAGE_SHIFT; |
f2a0dcb1 TH |
437 | *addr += 2; |
438 | } | |
439 | #else | |
b9eb1a61 | 440 | static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) |
f2a0dcb1 | 441 | { |
b9eb1a61 | 442 | *(*addr)++ = val >> PAGE_SHIFT; |
f2a0dcb1 TH |
443 | } |
444 | #endif | |
3530bdc3 TH |
445 | |
446 | /* | |
447 | * vmw_mob_build_pt - Build a pagetable | |
448 | * | |
0fd53cfb | 449 | * @data_addr: Array of DMA addresses to the underlying buffer |
3530bdc3 TH |
450 | * object's data pages. |
451 | * @num_data_pages: Number of buffer object data pages. | |
452 | * @pt_pages: Array of page pointers to the page table pages. | |
453 | * | |
454 | * Returns the number of page table pages actually used. | |
455 | * Uses atomic kmaps of highmem pages to avoid TLB thrashing. | |
456 | */ | |
0fd53cfb | 457 | static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, |
3530bdc3 | 458 | unsigned long num_data_pages, |
0fd53cfb | 459 | struct vmw_piter *pt_iter) |
3530bdc3 TH |
460 | { |
461 | unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; | |
462 | unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); | |
0fd53cfb | 463 | unsigned long pt_page; |
b9eb1a61 | 464 | u32 *addr, *save_addr; |
3530bdc3 | 465 | unsigned long i; |
0fd53cfb | 466 | struct page *page; |
3530bdc3 | 467 | |
3530bdc3 | 468 | for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { |
0fd53cfb TH |
469 | page = vmw_piter_page(pt_iter); |
470 | ||
471 | save_addr = addr = kmap_atomic(page); | |
3530bdc3 TH |
472 | |
473 | for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { | |
f2a0dcb1 TH |
474 | vmw_mob_assign_ppn(&addr, |
475 | vmw_piter_dma_addr(data_iter)); | |
0fd53cfb | 476 | if (unlikely(--num_data_pages == 0)) |
3530bdc3 | 477 | break; |
0fd53cfb | 478 | WARN_ON(!vmw_piter_next(data_iter)); |
3530bdc3 TH |
479 | } |
480 | kunmap_atomic(save_addr); | |
0fd53cfb | 481 | vmw_piter_next(pt_iter); |
3530bdc3 TH |
482 | } |
483 | ||
484 | return num_pt_pages; | |
485 | } | |
486 | ||
487 | /* | |
488 | * vmw_mob_build_pt - Set up a multilevel mob pagetable | |
489 | * | |
490 | * @mob: Pointer to a mob whose page table needs setting up. | |
0fd53cfb | 491 | * @data_addr Array of DMA addresses to the buffer object's data |
3530bdc3 TH |
492 | * pages. |
493 | * @num_data_pages: Number of buffer object data pages. | |
494 | * | |
495 | * Uses tail recursion to set up a multilevel mob page table. | |
496 | */ | |
497 | static void vmw_mob_pt_setup(struct vmw_mob *mob, | |
0fd53cfb | 498 | struct vmw_piter data_iter, |
3530bdc3 TH |
499 | unsigned long num_data_pages) |
500 | { | |
3530bdc3 | 501 | unsigned long num_pt_pages = 0; |
668b2066 | 502 | struct ttm_buffer_object *bo = &mob->pt_bo->tbo; |
74231041 | 503 | struct vmw_piter save_pt_iter = {0}; |
0fd53cfb TH |
504 | struct vmw_piter pt_iter; |
505 | const struct vmw_sg_table *vsgt; | |
3530bdc3 TH |
506 | int ret; |
507 | ||
74231041 ZR |
508 | BUG_ON(num_data_pages == 0); |
509 | ||
dfd5e50e | 510 | ret = ttm_bo_reserve(bo, false, true, NULL); |
3530bdc3 TH |
511 | BUG_ON(ret != 0); |
512 | ||
0fd53cfb TH |
513 | vsgt = vmw_bo_sg_table(bo); |
514 | vmw_piter_start(&pt_iter, vsgt, 0); | |
515 | BUG_ON(!vmw_piter_next(&pt_iter)); | |
3530bdc3 TH |
516 | mob->pt_level = 0; |
517 | while (likely(num_data_pages > 1)) { | |
518 | ++mob->pt_level; | |
519 | BUG_ON(mob->pt_level > 2); | |
0fd53cfb TH |
520 | save_pt_iter = pt_iter; |
521 | num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, | |
522 | &pt_iter); | |
523 | data_iter = save_pt_iter; | |
3530bdc3 TH |
524 | num_data_pages = num_pt_pages; |
525 | } | |
526 | ||
0fd53cfb | 527 | mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); |
3530bdc3 TH |
528 | ttm_bo_unreserve(bo); |
529 | } | |
530 | ||
531 | /* | |
532 | * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. | |
533 | * | |
534 | * @mob: Pointer to a mob to destroy. | |
535 | */ | |
536 | void vmw_mob_destroy(struct vmw_mob *mob) | |
537 | { | |
6034d9d4 | 538 | if (mob->pt_bo) { |
668b2066 ZR |
539 | vmw_bo_unpin_unlocked(&mob->pt_bo->tbo); |
540 | vmw_bo_unreference(&mob->pt_bo); | |
6034d9d4 | 541 | } |
3530bdc3 TH |
542 | kfree(mob); |
543 | } | |
544 | ||
545 | /* | |
546 | * vmw_mob_unbind - Hide a mob from the device. | |
547 | * | |
548 | * @dev_priv: Pointer to a device private. | |
549 | * @mob_id: Device id of the mob to unbind. | |
550 | */ | |
551 | void vmw_mob_unbind(struct vmw_private *dev_priv, | |
552 | struct vmw_mob *mob) | |
553 | { | |
554 | struct { | |
555 | SVGA3dCmdHeader header; | |
556 | SVGA3dCmdDestroyGBMob body; | |
557 | } *cmd; | |
558 | int ret; | |
668b2066 | 559 | struct ttm_buffer_object *bo = &mob->pt_bo->tbo; |
3530bdc3 TH |
560 | |
561 | if (bo) { | |
dfd5e50e | 562 | ret = ttm_bo_reserve(bo, false, true, NULL); |
3530bdc3 TH |
563 | /* |
564 | * Noone else should be using this buffer. | |
565 | */ | |
566 | BUG_ON(ret != 0); | |
567 | } | |
568 | ||
8426ed9c | 569 | cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd)); |
11c45419 | 570 | if (cmd) { |
6950e23e AK |
571 | cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; |
572 | cmd->header.size = sizeof(cmd->body); | |
573 | cmd->body.mobid = mob->id; | |
8426ed9c | 574 | vmw_cmd_commit(dev_priv, sizeof(*cmd)); |
3530bdc3 | 575 | } |
11c45419 | 576 | |
3530bdc3 | 577 | if (bo) { |
e9431ea5 | 578 | vmw_bo_fence_single(bo, NULL); |
3530bdc3 TH |
579 | ttm_bo_unreserve(bo); |
580 | } | |
153b3d5b | 581 | vmw_fifo_resource_dec(dev_priv); |
3530bdc3 TH |
582 | } |
583 | ||
584 | /* | |
585 | * vmw_mob_bind - Make a mob visible to the device after first | |
586 | * populating it if necessary. | |
587 | * | |
588 | * @dev_priv: Pointer to a device private. | |
589 | * @mob: Pointer to the mob we're making visible. | |
0fd53cfb | 590 | * @data_addr: Array of DMA addresses to the data pages of the underlying |
3530bdc3 TH |
591 | * buffer object. |
592 | * @num_data_pages: Number of data pages of the underlying buffer | |
593 | * object. | |
594 | * @mob_id: Device id of the mob to bind | |
595 | * | |
596 | * This function is intended to be interfaced with the ttm_tt backend | |
597 | * code. | |
598 | */ | |
599 | int vmw_mob_bind(struct vmw_private *dev_priv, | |
600 | struct vmw_mob *mob, | |
0fd53cfb | 601 | const struct vmw_sg_table *vsgt, |
3530bdc3 TH |
602 | unsigned long num_data_pages, |
603 | int32_t mob_id) | |
604 | { | |
605 | int ret; | |
606 | bool pt_set_up = false; | |
0fd53cfb | 607 | struct vmw_piter data_iter; |
3530bdc3 TH |
608 | struct { |
609 | SVGA3dCmdHeader header; | |
3e894a62 | 610 | SVGA3dCmdDefineGBMob64 body; |
3530bdc3 TH |
611 | } *cmd; |
612 | ||
613 | mob->id = mob_id; | |
0fd53cfb TH |
614 | vmw_piter_start(&data_iter, vsgt, 0); |
615 | if (unlikely(!vmw_piter_next(&data_iter))) | |
616 | return 0; | |
617 | ||
3530bdc3 | 618 | if (likely(num_data_pages == 1)) { |
f2a0dcb1 | 619 | mob->pt_level = VMW_MOBFMT_PTDEPTH_0; |
0fd53cfb | 620 | mob->pt_root_page = vmw_piter_dma_addr(&data_iter); |
3530bdc3 TH |
621 | } else if (unlikely(mob->pt_bo == NULL)) { |
622 | ret = vmw_mob_pt_populate(dev_priv, mob); | |
623 | if (unlikely(ret != 0)) | |
624 | return ret; | |
625 | ||
0fd53cfb | 626 | vmw_mob_pt_setup(mob, data_iter, num_data_pages); |
3530bdc3 | 627 | pt_set_up = true; |
ebc9ac7c | 628 | mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PT_1; |
3530bdc3 TH |
629 | } |
630 | ||
153b3d5b | 631 | vmw_fifo_resource_inc(dev_priv); |
3530bdc3 | 632 | |
8426ed9c | 633 | cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd)); |
11c45419 | 634 | if (unlikely(cmd == NULL)) |
3530bdc3 | 635 | goto out_no_cmd_space; |
3530bdc3 | 636 | |
3e894a62 | 637 | cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; |
3530bdc3 TH |
638 | cmd->header.size = sizeof(cmd->body); |
639 | cmd->body.mobid = mob_id; | |
640 | cmd->body.ptDepth = mob->pt_level; | |
b9eb1a61 | 641 | cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; |
3530bdc3 TH |
642 | cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; |
643 | ||
8426ed9c | 644 | vmw_cmd_commit(dev_priv, sizeof(*cmd)); |
3530bdc3 TH |
645 | |
646 | return 0; | |
647 | ||
648 | out_no_cmd_space: | |
153b3d5b | 649 | vmw_fifo_resource_dec(dev_priv); |
6034d9d4 | 650 | if (pt_set_up) { |
668b2066 ZR |
651 | vmw_bo_unpin_unlocked(&mob->pt_bo->tbo); |
652 | vmw_bo_unreference(&mob->pt_bo); | |
6034d9d4 | 653 | } |
3530bdc3 TH |
654 | |
655 | return -ENOMEM; | |
656 | } |