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dc5698e8 DA |
1 | /* |
2 | * Copyright (C) 2015 Red Hat, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * Authors: | |
6 | * Dave Airlie | |
7 | * Alon Levy | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
22 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
23 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
24 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
25 | * OTHER DEALINGS IN THE SOFTWARE. | |
26 | */ | |
27 | ||
28 | #include <ttm/ttm_bo_api.h> | |
29 | #include <ttm/ttm_bo_driver.h> | |
30 | #include <ttm/ttm_placement.h> | |
31 | #include <ttm/ttm_page_alloc.h> | |
32 | #include <ttm/ttm_module.h> | |
33 | #include <drm/drmP.h> | |
34 | #include <drm/drm.h> | |
62fb7a5e | 35 | #include <drm/virtgpu_drm.h> |
dc5698e8 DA |
36 | #include "virtgpu_drv.h" |
37 | ||
38 | #include <linux/delay.h> | |
39 | ||
40 | #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT) | |
41 | ||
42 | static struct | |
43 | virtio_gpu_device *virtio_gpu_get_vgdev(struct ttm_bo_device *bdev) | |
44 | { | |
45 | struct virtio_gpu_mman *mman; | |
46 | struct virtio_gpu_device *vgdev; | |
47 | ||
48 | mman = container_of(bdev, struct virtio_gpu_mman, bdev); | |
49 | vgdev = container_of(mman, struct virtio_gpu_device, mman); | |
50 | return vgdev; | |
51 | } | |
52 | ||
53 | static int virtio_gpu_ttm_mem_global_init(struct drm_global_reference *ref) | |
54 | { | |
55 | return ttm_mem_global_init(ref->object); | |
56 | } | |
57 | ||
58 | static void virtio_gpu_ttm_mem_global_release(struct drm_global_reference *ref) | |
59 | { | |
60 | ttm_mem_global_release(ref->object); | |
61 | } | |
62 | ||
63 | static int virtio_gpu_ttm_global_init(struct virtio_gpu_device *vgdev) | |
64 | { | |
65 | struct drm_global_reference *global_ref; | |
66 | int r; | |
67 | ||
68 | vgdev->mman.mem_global_referenced = false; | |
69 | global_ref = &vgdev->mman.mem_global_ref; | |
70 | global_ref->global_type = DRM_GLOBAL_TTM_MEM; | |
71 | global_ref->size = sizeof(struct ttm_mem_global); | |
72 | global_ref->init = &virtio_gpu_ttm_mem_global_init; | |
73 | global_ref->release = &virtio_gpu_ttm_mem_global_release; | |
74 | ||
75 | r = drm_global_item_ref(global_ref); | |
76 | if (r != 0) { | |
77 | DRM_ERROR("Failed setting up TTM memory accounting " | |
78 | "subsystem.\n"); | |
79 | return r; | |
80 | } | |
81 | ||
82 | vgdev->mman.bo_global_ref.mem_glob = | |
83 | vgdev->mman.mem_global_ref.object; | |
84 | global_ref = &vgdev->mman.bo_global_ref.ref; | |
85 | global_ref->global_type = DRM_GLOBAL_TTM_BO; | |
86 | global_ref->size = sizeof(struct ttm_bo_global); | |
87 | global_ref->init = &ttm_bo_global_init; | |
88 | global_ref->release = &ttm_bo_global_release; | |
89 | r = drm_global_item_ref(global_ref); | |
90 | if (r != 0) { | |
91 | DRM_ERROR("Failed setting up TTM BO subsystem.\n"); | |
92 | drm_global_item_unref(&vgdev->mman.mem_global_ref); | |
93 | return r; | |
94 | } | |
95 | ||
96 | vgdev->mman.mem_global_referenced = true; | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static void virtio_gpu_ttm_global_fini(struct virtio_gpu_device *vgdev) | |
101 | { | |
102 | if (vgdev->mman.mem_global_referenced) { | |
103 | drm_global_item_unref(&vgdev->mman.bo_global_ref.ref); | |
104 | drm_global_item_unref(&vgdev->mman.mem_global_ref); | |
105 | vgdev->mman.mem_global_referenced = false; | |
106 | } | |
107 | } | |
108 | ||
109 | #if 0 | |
110 | /* | |
111 | * Hmm, seems to not do anything useful. Leftover debug hack? | |
112 | * Something like printing pagefaults to kernel log? | |
113 | */ | |
114 | static struct vm_operations_struct virtio_gpu_ttm_vm_ops; | |
115 | static const struct vm_operations_struct *ttm_vm_ops; | |
116 | ||
117 | static int virtio_gpu_ttm_fault(struct vm_area_struct *vma, | |
118 | struct vm_fault *vmf) | |
119 | { | |
120 | struct ttm_buffer_object *bo; | |
121 | struct virtio_gpu_device *vgdev; | |
122 | int r; | |
123 | ||
124 | bo = (struct ttm_buffer_object *)vma->vm_private_data; | |
125 | if (bo == NULL) | |
126 | return VM_FAULT_NOPAGE; | |
127 | vgdev = virtio_gpu_get_vgdev(bo->bdev); | |
128 | r = ttm_vm_ops->fault(vma, vmf); | |
129 | return r; | |
130 | } | |
131 | #endif | |
132 | ||
133 | int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma) | |
134 | { | |
135 | struct drm_file *file_priv; | |
136 | struct virtio_gpu_device *vgdev; | |
137 | int r; | |
138 | ||
139 | file_priv = filp->private_data; | |
140 | vgdev = file_priv->minor->dev->dev_private; | |
141 | if (vgdev == NULL) { | |
142 | DRM_ERROR( | |
143 | "filp->private_data->minor->dev->dev_private == NULL\n"); | |
144 | return -EINVAL; | |
145 | } | |
146 | r = ttm_bo_mmap(filp, vma, &vgdev->mman.bdev); | |
147 | #if 0 | |
148 | if (unlikely(r != 0)) | |
149 | return r; | |
150 | if (unlikely(ttm_vm_ops == NULL)) { | |
151 | ttm_vm_ops = vma->vm_ops; | |
152 | virtio_gpu_ttm_vm_ops = *ttm_vm_ops; | |
153 | virtio_gpu_ttm_vm_ops.fault = &virtio_gpu_ttm_fault; | |
154 | } | |
155 | vma->vm_ops = &virtio_gpu_ttm_vm_ops; | |
156 | return 0; | |
157 | #else | |
158 | return r; | |
159 | #endif | |
160 | } | |
161 | ||
162 | static int virtio_gpu_invalidate_caches(struct ttm_bo_device *bdev, | |
163 | uint32_t flags) | |
164 | { | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man, | |
169 | struct ttm_buffer_object *bo, | |
170 | const struct ttm_place *place, | |
171 | struct ttm_mem_reg *mem) | |
172 | { | |
173 | mem->mm_node = (void *)1; | |
174 | return 0; | |
175 | } | |
176 | ||
177 | static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man, | |
178 | struct ttm_mem_reg *mem) | |
179 | { | |
180 | mem->mm_node = (void *)NULL; | |
181 | return; | |
182 | } | |
183 | ||
184 | static int ttm_bo_man_init(struct ttm_mem_type_manager *man, | |
185 | unsigned long p_size) | |
186 | { | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man) | |
191 | { | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static void ttm_bo_man_debug(struct ttm_mem_type_manager *man, | |
196 | const char *prefix) | |
197 | { | |
198 | } | |
199 | ||
200 | static const struct ttm_mem_type_manager_func virtio_gpu_bo_manager_func = { | |
201 | ttm_bo_man_init, | |
202 | ttm_bo_man_takedown, | |
203 | ttm_bo_man_get_node, | |
204 | ttm_bo_man_put_node, | |
205 | ttm_bo_man_debug | |
206 | }; | |
207 | ||
208 | static int virtio_gpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, | |
209 | struct ttm_mem_type_manager *man) | |
210 | { | |
211 | struct virtio_gpu_device *vgdev; | |
212 | ||
213 | vgdev = virtio_gpu_get_vgdev(bdev); | |
214 | ||
215 | switch (type) { | |
216 | case TTM_PL_SYSTEM: | |
217 | /* System memory */ | |
218 | man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; | |
219 | man->available_caching = TTM_PL_MASK_CACHING; | |
220 | man->default_caching = TTM_PL_FLAG_CACHED; | |
221 | break; | |
222 | case TTM_PL_TT: | |
223 | man->func = &virtio_gpu_bo_manager_func; | |
224 | man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; | |
225 | man->available_caching = TTM_PL_MASK_CACHING; | |
226 | man->default_caching = TTM_PL_FLAG_CACHED; | |
227 | break; | |
228 | default: | |
229 | DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); | |
230 | return -EINVAL; | |
231 | } | |
232 | return 0; | |
233 | } | |
234 | ||
235 | static void virtio_gpu_evict_flags(struct ttm_buffer_object *bo, | |
236 | struct ttm_placement *placement) | |
237 | { | |
238 | static struct ttm_place placements = { | |
239 | .fpfn = 0, | |
240 | .lpfn = 0, | |
241 | .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM, | |
242 | }; | |
243 | ||
244 | placement->placement = &placements; | |
245 | placement->busy_placement = &placements; | |
246 | placement->num_placement = 1; | |
247 | placement->num_busy_placement = 1; | |
248 | return; | |
249 | } | |
250 | ||
251 | static int virtio_gpu_verify_access(struct ttm_buffer_object *bo, | |
252 | struct file *filp) | |
253 | { | |
254 | return 0; | |
255 | } | |
256 | ||
257 | static int virtio_gpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, | |
258 | struct ttm_mem_reg *mem) | |
259 | { | |
260 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
261 | ||
262 | mem->bus.addr = NULL; | |
263 | mem->bus.offset = 0; | |
264 | mem->bus.size = mem->num_pages << PAGE_SHIFT; | |
265 | mem->bus.base = 0; | |
266 | mem->bus.is_iomem = false; | |
267 | if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) | |
268 | return -EINVAL; | |
269 | switch (mem->mem_type) { | |
270 | case TTM_PL_SYSTEM: | |
271 | case TTM_PL_TT: | |
272 | /* system memory */ | |
273 | return 0; | |
274 | default: | |
275 | return -EINVAL; | |
276 | } | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static void virtio_gpu_ttm_io_mem_free(struct ttm_bo_device *bdev, | |
281 | struct ttm_mem_reg *mem) | |
282 | { | |
283 | } | |
284 | ||
285 | /* | |
286 | * TTM backend functions. | |
287 | */ | |
288 | struct virtio_gpu_ttm_tt { | |
289 | struct ttm_dma_tt ttm; | |
290 | struct virtio_gpu_device *vgdev; | |
291 | u64 offset; | |
292 | }; | |
293 | ||
294 | static int virtio_gpu_ttm_backend_bind(struct ttm_tt *ttm, | |
295 | struct ttm_mem_reg *bo_mem) | |
296 | { | |
297 | struct virtio_gpu_ttm_tt *gtt = (void *)ttm; | |
298 | ||
299 | gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); | |
300 | if (!ttm->num_pages) | |
301 | WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", | |
302 | ttm->num_pages, bo_mem, ttm); | |
303 | ||
304 | /* Not implemented */ | |
305 | return 0; | |
306 | } | |
307 | ||
308 | static int virtio_gpu_ttm_backend_unbind(struct ttm_tt *ttm) | |
309 | { | |
310 | /* Not implemented */ | |
311 | return 0; | |
312 | } | |
313 | ||
314 | static void virtio_gpu_ttm_backend_destroy(struct ttm_tt *ttm) | |
315 | { | |
316 | struct virtio_gpu_ttm_tt *gtt = (void *)ttm; | |
317 | ||
318 | ttm_dma_tt_fini(>t->ttm); | |
319 | kfree(gtt); | |
320 | } | |
321 | ||
322 | static struct ttm_backend_func virtio_gpu_backend_func = { | |
323 | .bind = &virtio_gpu_ttm_backend_bind, | |
324 | .unbind = &virtio_gpu_ttm_backend_unbind, | |
325 | .destroy = &virtio_gpu_ttm_backend_destroy, | |
326 | }; | |
327 | ||
328 | static int virtio_gpu_ttm_tt_populate(struct ttm_tt *ttm) | |
329 | { | |
330 | if (ttm->state != tt_unpopulated) | |
331 | return 0; | |
332 | ||
333 | return ttm_pool_populate(ttm); | |
334 | } | |
335 | ||
336 | static void virtio_gpu_ttm_tt_unpopulate(struct ttm_tt *ttm) | |
337 | { | |
338 | ttm_pool_unpopulate(ttm); | |
339 | } | |
340 | ||
341 | static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_bo_device *bdev, | |
342 | unsigned long size, | |
343 | uint32_t page_flags, | |
344 | struct page *dummy_read_page) | |
345 | { | |
346 | struct virtio_gpu_device *vgdev; | |
347 | struct virtio_gpu_ttm_tt *gtt; | |
348 | ||
349 | vgdev = virtio_gpu_get_vgdev(bdev); | |
350 | gtt = kzalloc(sizeof(struct virtio_gpu_ttm_tt), GFP_KERNEL); | |
351 | if (gtt == NULL) | |
352 | return NULL; | |
353 | gtt->ttm.ttm.func = &virtio_gpu_backend_func; | |
354 | gtt->vgdev = vgdev; | |
355 | if (ttm_dma_tt_init(>t->ttm, bdev, size, page_flags, | |
356 | dummy_read_page)) { | |
357 | kfree(gtt); | |
358 | return NULL; | |
359 | } | |
360 | return >t->ttm.ttm; | |
361 | } | |
362 | ||
363 | static void virtio_gpu_move_null(struct ttm_buffer_object *bo, | |
364 | struct ttm_mem_reg *new_mem) | |
365 | { | |
366 | struct ttm_mem_reg *old_mem = &bo->mem; | |
367 | ||
368 | BUG_ON(old_mem->mm_node != NULL); | |
369 | *old_mem = *new_mem; | |
370 | new_mem->mm_node = NULL; | |
371 | } | |
372 | ||
373 | static int virtio_gpu_bo_move(struct ttm_buffer_object *bo, | |
374 | bool evict, bool interruptible, | |
375 | bool no_wait_gpu, | |
376 | struct ttm_mem_reg *new_mem) | |
377 | { | |
378 | virtio_gpu_move_null(bo, new_mem); | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static void virtio_gpu_bo_move_notify(struct ttm_buffer_object *tbo, | |
383 | struct ttm_mem_reg *new_mem) | |
384 | { | |
385 | struct virtio_gpu_object *bo; | |
386 | struct virtio_gpu_device *vgdev; | |
387 | ||
388 | bo = container_of(tbo, struct virtio_gpu_object, tbo); | |
389 | vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private; | |
390 | ||
391 | if (!new_mem || (new_mem->placement & TTM_PL_FLAG_SYSTEM)) { | |
392 | if (bo->hw_res_handle) | |
393 | virtio_gpu_cmd_resource_inval_backing(vgdev, | |
394 | bo->hw_res_handle); | |
395 | ||
396 | } else if (new_mem->placement & TTM_PL_FLAG_TT) { | |
397 | if (bo->hw_res_handle) { | |
398 | virtio_gpu_object_attach(vgdev, bo, bo->hw_res_handle, | |
399 | NULL); | |
400 | } | |
401 | } | |
402 | } | |
403 | ||
404 | static void virtio_gpu_bo_swap_notify(struct ttm_buffer_object *tbo) | |
405 | { | |
406 | struct virtio_gpu_object *bo; | |
407 | struct virtio_gpu_device *vgdev; | |
408 | ||
409 | bo = container_of(tbo, struct virtio_gpu_object, tbo); | |
410 | vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private; | |
411 | ||
412 | if (bo->pages) | |
413 | virtio_gpu_object_free_sg_table(bo); | |
414 | } | |
415 | ||
416 | static struct ttm_bo_driver virtio_gpu_bo_driver = { | |
417 | .ttm_tt_create = &virtio_gpu_ttm_tt_create, | |
418 | .ttm_tt_populate = &virtio_gpu_ttm_tt_populate, | |
419 | .ttm_tt_unpopulate = &virtio_gpu_ttm_tt_unpopulate, | |
420 | .invalidate_caches = &virtio_gpu_invalidate_caches, | |
421 | .init_mem_type = &virtio_gpu_init_mem_type, | |
422 | .evict_flags = &virtio_gpu_evict_flags, | |
423 | .move = &virtio_gpu_bo_move, | |
424 | .verify_access = &virtio_gpu_verify_access, | |
425 | .io_mem_reserve = &virtio_gpu_ttm_io_mem_reserve, | |
426 | .io_mem_free = &virtio_gpu_ttm_io_mem_free, | |
427 | .move_notify = &virtio_gpu_bo_move_notify, | |
428 | .swap_notify = &virtio_gpu_bo_swap_notify, | |
98c2872a CK |
429 | .lru_tail = &ttm_bo_default_lru_tail, |
430 | .swap_lru_tail = &ttm_bo_default_swap_lru_tail, | |
dc5698e8 DA |
431 | }; |
432 | ||
433 | int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev) | |
434 | { | |
435 | int r; | |
436 | ||
437 | r = virtio_gpu_ttm_global_init(vgdev); | |
438 | if (r) | |
439 | return r; | |
440 | /* No others user of address space so set it to 0 */ | |
441 | r = ttm_bo_device_init(&vgdev->mman.bdev, | |
442 | vgdev->mman.bo_global_ref.ref.object, | |
443 | &virtio_gpu_bo_driver, | |
444 | vgdev->ddev->anon_inode->i_mapping, | |
445 | DRM_FILE_PAGE_OFFSET, 0); | |
446 | if (r) { | |
447 | DRM_ERROR("failed initializing buffer object driver(%d).\n", r); | |
448 | goto err_dev_init; | |
dc5698e8 DA |
449 | } |
450 | ||
451 | r = ttm_bo_init_mm(&vgdev->mman.bdev, TTM_PL_TT, 0); | |
452 | if (r) { | |
453 | DRM_ERROR("Failed initializing GTT heap.\n"); | |
454 | goto err_mm_init; | |
dc5698e8 DA |
455 | } |
456 | return 0; | |
457 | ||
458 | err_mm_init: | |
459 | ttm_bo_device_release(&vgdev->mman.bdev); | |
460 | err_dev_init: | |
461 | virtio_gpu_ttm_global_fini(vgdev); | |
462 | return r; | |
463 | } | |
464 | ||
465 | void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev) | |
466 | { | |
467 | ttm_bo_device_release(&vgdev->mman.bdev); | |
468 | virtio_gpu_ttm_global_fini(vgdev); | |
469 | DRM_INFO("virtio_gpu: ttm finalized\n"); | |
470 | } |