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dd55d44f HG |
1 | /* |
2 | * Copyright (C) 2013-2017 Oracle Corporation | |
3 | * This file is based on ast_ttm.c | |
4 | * Copyright 2012 Red Hat Inc. | |
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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
18 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
19 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
20 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | * | |
22 | * The above copyright notice and this permission notice (including the | |
23 | * next paragraph) shall be included in all copies or substantial portions | |
24 | * of the Software. | |
25 | * | |
26 | * | |
27 | * Authors: Dave Airlie <airlied@redhat.com> | |
28 | * Michael Thayer <michael.thayer@oracle.com> | |
29 | */ | |
30 | #include "vbox_drv.h" | |
31 | #include <ttm/ttm_page_alloc.h> | |
32 | ||
33 | static inline struct vbox_private *vbox_bdev(struct ttm_bo_device *bd) | |
34 | { | |
35 | return container_of(bd, struct vbox_private, ttm.bdev); | |
36 | } | |
37 | ||
38 | static int vbox_ttm_mem_global_init(struct drm_global_reference *ref) | |
39 | { | |
40 | return ttm_mem_global_init(ref->object); | |
41 | } | |
42 | ||
43 | static void vbox_ttm_mem_global_release(struct drm_global_reference *ref) | |
44 | { | |
45 | ttm_mem_global_release(ref->object); | |
46 | } | |
47 | ||
48 | /** | |
49 | * Adds the vbox memory manager object/structures to the global memory manager. | |
50 | */ | |
51 | static int vbox_ttm_global_init(struct vbox_private *vbox) | |
52 | { | |
53 | struct drm_global_reference *global_ref; | |
54 | int ret; | |
55 | ||
56 | global_ref = &vbox->ttm.mem_global_ref; | |
57 | global_ref->global_type = DRM_GLOBAL_TTM_MEM; | |
58 | global_ref->size = sizeof(struct ttm_mem_global); | |
59 | global_ref->init = &vbox_ttm_mem_global_init; | |
60 | global_ref->release = &vbox_ttm_mem_global_release; | |
61 | ret = drm_global_item_ref(global_ref); | |
62 | if (ret) { | |
63 | DRM_ERROR("Failed setting up TTM memory subsystem.\n"); | |
64 | return ret; | |
65 | } | |
66 | ||
67 | vbox->ttm.bo_global_ref.mem_glob = vbox->ttm.mem_global_ref.object; | |
68 | global_ref = &vbox->ttm.bo_global_ref.ref; | |
69 | global_ref->global_type = DRM_GLOBAL_TTM_BO; | |
70 | global_ref->size = sizeof(struct ttm_bo_global); | |
71 | global_ref->init = &ttm_bo_global_init; | |
72 | global_ref->release = &ttm_bo_global_release; | |
73 | ||
74 | ret = drm_global_item_ref(global_ref); | |
75 | if (ret) { | |
76 | DRM_ERROR("Failed setting up TTM BO subsystem.\n"); | |
77 | drm_global_item_unref(&vbox->ttm.mem_global_ref); | |
78 | return ret; | |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
84 | /** | |
85 | * Removes the vbox memory manager object from the global memory manager. | |
86 | */ | |
87 | static void vbox_ttm_global_release(struct vbox_private *vbox) | |
88 | { | |
89 | drm_global_item_unref(&vbox->ttm.bo_global_ref.ref); | |
90 | drm_global_item_unref(&vbox->ttm.mem_global_ref); | |
91 | } | |
92 | ||
93 | static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo) | |
94 | { | |
95 | struct vbox_bo *bo; | |
96 | ||
97 | bo = container_of(tbo, struct vbox_bo, bo); | |
98 | ||
99 | drm_gem_object_release(&bo->gem); | |
100 | kfree(bo); | |
101 | } | |
102 | ||
103 | static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo) | |
104 | { | |
105 | if (bo->destroy == &vbox_bo_ttm_destroy) | |
106 | return true; | |
107 | ||
108 | return false; | |
109 | } | |
110 | ||
111 | static int | |
112 | vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type, | |
113 | struct ttm_mem_type_manager *man) | |
114 | { | |
115 | switch (type) { | |
116 | case TTM_PL_SYSTEM: | |
117 | man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; | |
118 | man->available_caching = TTM_PL_MASK_CACHING; | |
119 | man->default_caching = TTM_PL_FLAG_CACHED; | |
120 | break; | |
121 | case TTM_PL_VRAM: | |
122 | man->func = &ttm_bo_manager_func; | |
123 | man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE; | |
124 | man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC; | |
125 | man->default_caching = TTM_PL_FLAG_WC; | |
126 | break; | |
127 | default: | |
128 | DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type); | |
129 | return -EINVAL; | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static void | |
136 | vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl) | |
137 | { | |
138 | struct vbox_bo *vboxbo = vbox_bo(bo); | |
139 | ||
140 | if (!vbox_ttm_bo_is_vbox_bo(bo)) | |
141 | return; | |
142 | ||
143 | vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM); | |
144 | *pl = vboxbo->placement; | |
145 | } | |
146 | ||
147 | static int vbox_bo_verify_access(struct ttm_buffer_object *bo, | |
148 | struct file *filp) | |
149 | { | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev, | |
154 | struct ttm_mem_reg *mem) | |
155 | { | |
156 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
157 | struct vbox_private *vbox = vbox_bdev(bdev); | |
158 | ||
159 | mem->bus.addr = NULL; | |
160 | mem->bus.offset = 0; | |
161 | mem->bus.size = mem->num_pages << PAGE_SHIFT; | |
162 | mem->bus.base = 0; | |
163 | mem->bus.is_iomem = false; | |
164 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | |
165 | return -EINVAL; | |
166 | switch (mem->mem_type) { | |
167 | case TTM_PL_SYSTEM: | |
168 | /* system memory */ | |
169 | return 0; | |
170 | case TTM_PL_VRAM: | |
171 | mem->bus.offset = mem->start << PAGE_SHIFT; | |
172 | mem->bus.base = pci_resource_start(vbox->dev->pdev, 0); | |
173 | mem->bus.is_iomem = true; | |
174 | break; | |
175 | default: | |
176 | return -EINVAL; | |
177 | } | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev, | |
182 | struct ttm_mem_reg *mem) | |
183 | { | |
184 | } | |
185 | ||
186 | static int vbox_bo_move(struct ttm_buffer_object *bo, | |
187 | bool evict, bool interruptible, | |
188 | bool no_wait_gpu, struct ttm_mem_reg *new_mem) | |
189 | { | |
190 | return ttm_bo_move_memcpy(bo, interruptible, no_wait_gpu, new_mem); | |
191 | } | |
192 | ||
193 | static void vbox_ttm_backend_destroy(struct ttm_tt *tt) | |
194 | { | |
195 | ttm_tt_fini(tt); | |
196 | kfree(tt); | |
197 | } | |
198 | ||
199 | static struct ttm_backend_func vbox_tt_backend_func = { | |
200 | .destroy = &vbox_ttm_backend_destroy, | |
201 | }; | |
202 | ||
203 | static struct ttm_tt *vbox_ttm_tt_create(struct ttm_bo_device *bdev, | |
204 | unsigned long size, | |
205 | u32 page_flags, | |
206 | struct page *dummy_read_page) | |
207 | { | |
208 | struct ttm_tt *tt; | |
209 | ||
210 | tt = kzalloc(sizeof(*tt), GFP_KERNEL); | |
211 | if (!tt) | |
212 | return NULL; | |
213 | ||
214 | tt->func = &vbox_tt_backend_func; | |
215 | if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) { | |
216 | kfree(tt); | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | return tt; | |
221 | } | |
222 | ||
223 | static int vbox_ttm_tt_populate(struct ttm_tt *ttm) | |
224 | { | |
225 | return ttm_pool_populate(ttm); | |
226 | } | |
227 | ||
228 | static void vbox_ttm_tt_unpopulate(struct ttm_tt *ttm) | |
229 | { | |
230 | ttm_pool_unpopulate(ttm); | |
231 | } | |
232 | ||
cb67fa13 | 233 | static struct ttm_bo_driver vbox_bo_driver = { |
dd55d44f HG |
234 | .ttm_tt_create = vbox_ttm_tt_create, |
235 | .ttm_tt_populate = vbox_ttm_tt_populate, | |
236 | .ttm_tt_unpopulate = vbox_ttm_tt_unpopulate, | |
237 | .init_mem_type = vbox_bo_init_mem_type, | |
238 | .eviction_valuable = ttm_bo_eviction_valuable, | |
239 | .evict_flags = vbox_bo_evict_flags, | |
240 | .move = vbox_bo_move, | |
241 | .verify_access = vbox_bo_verify_access, | |
242 | .io_mem_reserve = &vbox_ttm_io_mem_reserve, | |
243 | .io_mem_free = &vbox_ttm_io_mem_free, | |
244 | .io_mem_pfn = ttm_bo_default_io_mem_pfn, | |
245 | }; | |
246 | ||
247 | int vbox_mm_init(struct vbox_private *vbox) | |
248 | { | |
249 | int ret; | |
250 | struct drm_device *dev = vbox->dev; | |
251 | struct ttm_bo_device *bdev = &vbox->ttm.bdev; | |
252 | ||
253 | ret = vbox_ttm_global_init(vbox); | |
254 | if (ret) | |
255 | return ret; | |
256 | ||
257 | ret = ttm_bo_device_init(&vbox->ttm.bdev, | |
258 | vbox->ttm.bo_global_ref.ref.object, | |
259 | &vbox_bo_driver, | |
260 | dev->anon_inode->i_mapping, | |
261 | DRM_FILE_PAGE_OFFSET, true); | |
262 | if (ret) { | |
263 | DRM_ERROR("Error initialising bo driver; %d\n", ret); | |
264 | goto err_ttm_global_release; | |
265 | } | |
266 | ||
267 | ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, | |
268 | vbox->available_vram_size >> PAGE_SHIFT); | |
269 | if (ret) { | |
270 | DRM_ERROR("Failed ttm VRAM init: %d\n", ret); | |
271 | goto err_device_release; | |
272 | } | |
273 | ||
274 | #ifdef DRM_MTRR_WC | |
275 | vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0), | |
276 | pci_resource_len(dev->pdev, 0), | |
277 | DRM_MTRR_WC); | |
278 | #else | |
279 | vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0), | |
280 | pci_resource_len(dev->pdev, 0)); | |
281 | #endif | |
282 | return 0; | |
283 | ||
284 | err_device_release: | |
285 | ttm_bo_device_release(&vbox->ttm.bdev); | |
286 | err_ttm_global_release: | |
287 | vbox_ttm_global_release(vbox); | |
288 | return ret; | |
289 | } | |
290 | ||
291 | void vbox_mm_fini(struct vbox_private *vbox) | |
292 | { | |
293 | #ifdef DRM_MTRR_WC | |
294 | drm_mtrr_del(vbox->fb_mtrr, | |
295 | pci_resource_start(vbox->dev->pdev, 0), | |
296 | pci_resource_len(vbox->dev->pdev, 0), DRM_MTRR_WC); | |
297 | #else | |
298 | arch_phys_wc_del(vbox->fb_mtrr); | |
299 | #endif | |
300 | ttm_bo_device_release(&vbox->ttm.bdev); | |
301 | vbox_ttm_global_release(vbox); | |
302 | } | |
303 | ||
304 | void vbox_ttm_placement(struct vbox_bo *bo, int domain) | |
305 | { | |
306 | unsigned int i; | |
307 | u32 c = 0; | |
308 | ||
309 | bo->placement.placement = bo->placements; | |
310 | bo->placement.busy_placement = bo->placements; | |
311 | ||
312 | if (domain & TTM_PL_FLAG_VRAM) | |
313 | bo->placements[c++].flags = | |
314 | TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM; | |
315 | if (domain & TTM_PL_FLAG_SYSTEM) | |
316 | bo->placements[c++].flags = | |
317 | TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; | |
318 | if (!c) | |
319 | bo->placements[c++].flags = | |
320 | TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; | |
321 | ||
322 | bo->placement.num_placement = c; | |
323 | bo->placement.num_busy_placement = c; | |
324 | ||
325 | for (i = 0; i < c; ++i) { | |
326 | bo->placements[i].fpfn = 0; | |
327 | bo->placements[i].lpfn = 0; | |
328 | } | |
329 | } | |
330 | ||
331 | int vbox_bo_create(struct drm_device *dev, int size, int align, | |
332 | u32 flags, struct vbox_bo **pvboxbo) | |
333 | { | |
334 | struct vbox_private *vbox = dev->dev_private; | |
335 | struct vbox_bo *vboxbo; | |
336 | size_t acc_size; | |
337 | int ret; | |
338 | ||
339 | vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL); | |
340 | if (!vboxbo) | |
341 | return -ENOMEM; | |
342 | ||
343 | ret = drm_gem_object_init(dev, &vboxbo->gem, size); | |
344 | if (ret) | |
345 | goto err_free_vboxbo; | |
346 | ||
347 | vboxbo->bo.bdev = &vbox->ttm.bdev; | |
348 | ||
349 | vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM); | |
350 | ||
351 | acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size, | |
352 | sizeof(struct vbox_bo)); | |
353 | ||
354 | ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size, | |
355 | ttm_bo_type_device, &vboxbo->placement, | |
356 | align >> PAGE_SHIFT, false, NULL, acc_size, | |
357 | NULL, NULL, vbox_bo_ttm_destroy); | |
358 | if (ret) | |
359 | goto err_free_vboxbo; | |
360 | ||
361 | *pvboxbo = vboxbo; | |
362 | ||
363 | return 0; | |
364 | ||
365 | err_free_vboxbo: | |
366 | kfree(vboxbo); | |
367 | return ret; | |
368 | } | |
369 | ||
370 | static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo) | |
371 | { | |
372 | return bo->bo.offset; | |
373 | } | |
374 | ||
375 | int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag, u64 *gpu_addr) | |
376 | { | |
377 | int i, ret; | |
378 | ||
379 | if (bo->pin_count) { | |
380 | bo->pin_count++; | |
381 | if (gpu_addr) | |
382 | *gpu_addr = vbox_bo_gpu_offset(bo); | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | vbox_ttm_placement(bo, pl_flag); | |
388 | ||
389 | for (i = 0; i < bo->placement.num_placement; i++) | |
390 | bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT; | |
391 | ||
392 | ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); | |
393 | if (ret) | |
394 | return ret; | |
395 | ||
396 | bo->pin_count = 1; | |
397 | ||
398 | if (gpu_addr) | |
399 | *gpu_addr = vbox_bo_gpu_offset(bo); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | int vbox_bo_unpin(struct vbox_bo *bo) | |
405 | { | |
406 | int i, ret; | |
407 | ||
408 | if (!bo->pin_count) { | |
409 | DRM_ERROR("unpin bad %p\n", bo); | |
410 | return 0; | |
411 | } | |
412 | bo->pin_count--; | |
413 | if (bo->pin_count) | |
414 | return 0; | |
415 | ||
416 | for (i = 0; i < bo->placement.num_placement; i++) | |
417 | bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; | |
418 | ||
419 | ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); | |
420 | if (ret) | |
421 | return ret; | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | /* | |
427 | * Move a vbox-owned buffer object to system memory if no one else has it | |
428 | * pinned. The caller must have pinned it previously, and this call will | |
429 | * release the caller's pin. | |
430 | */ | |
431 | int vbox_bo_push_sysram(struct vbox_bo *bo) | |
432 | { | |
433 | int i, ret; | |
434 | ||
435 | if (!bo->pin_count) { | |
436 | DRM_ERROR("unpin bad %p\n", bo); | |
437 | return 0; | |
438 | } | |
439 | bo->pin_count--; | |
440 | if (bo->pin_count) | |
441 | return 0; | |
442 | ||
443 | if (bo->kmap.virtual) | |
444 | ttm_bo_kunmap(&bo->kmap); | |
445 | ||
446 | vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM); | |
447 | ||
448 | for (i = 0; i < bo->placement.num_placement; i++) | |
449 | bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT; | |
450 | ||
451 | ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); | |
452 | if (ret) { | |
453 | DRM_ERROR("pushing to VRAM failed\n"); | |
454 | return ret; | |
455 | } | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | int vbox_mmap(struct file *filp, struct vm_area_struct *vma) | |
461 | { | |
462 | struct drm_file *file_priv; | |
463 | struct vbox_private *vbox; | |
464 | ||
465 | if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) | |
466 | return -EINVAL; | |
467 | ||
468 | file_priv = filp->private_data; | |
469 | vbox = file_priv->minor->dev->dev_private; | |
470 | ||
471 | return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev); | |
472 | } |