• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the
6  * "Software"), to deal in the Software without restriction, including
7  * without limitation the rights to use, copy, modify, merge, publish,
8  * distribute, sub license, and/or sell copies of the Software, and to
9  * permit persons to whom the Software is furnished to do so, subject to
10  * the following conditions:
11  *
12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
19  *
20  * The above copyright notice and this permission notice (including the
21  * next paragraph) shall be included in all copies or substantial portions
22  * of the Software.
23  *
24  */
25 /*
26  * Authors: Dave Airlie <airlied@redhat.com>
27  */
28 #include <drm/drmP.h>
29 #include "cirrus_drv.h"
30 #include <ttm/ttm_page_alloc.h>
31 
32 static inline struct cirrus_device *
cirrus_bdev(struct ttm_bo_device * bd)33 cirrus_bdev(struct ttm_bo_device *bd)
34 {
35 	return container_of(bd, struct cirrus_device, ttm.bdev);
36 }
37 
38 static int
cirrus_ttm_mem_global_init(struct drm_global_reference * ref)39 cirrus_ttm_mem_global_init(struct drm_global_reference *ref)
40 {
41 	return ttm_mem_global_init(ref->object);
42 }
43 
44 static void
cirrus_ttm_mem_global_release(struct drm_global_reference * ref)45 cirrus_ttm_mem_global_release(struct drm_global_reference *ref)
46 {
47 	ttm_mem_global_release(ref->object);
48 }
49 
cirrus_ttm_global_init(struct cirrus_device * cirrus)50 static int cirrus_ttm_global_init(struct cirrus_device *cirrus)
51 {
52 	struct drm_global_reference *global_ref;
53 	int r;
54 
55 	global_ref = &cirrus->ttm.mem_global_ref;
56 	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
57 	global_ref->size = sizeof(struct ttm_mem_global);
58 	global_ref->init = &cirrus_ttm_mem_global_init;
59 	global_ref->release = &cirrus_ttm_mem_global_release;
60 	r = drm_global_item_ref(global_ref);
61 	if (r != 0) {
62 		DRM_ERROR("Failed setting up TTM memory accounting "
63 			  "subsystem.\n");
64 		return r;
65 	}
66 
67 	cirrus->ttm.bo_global_ref.mem_glob =
68 		cirrus->ttm.mem_global_ref.object;
69 	global_ref = &cirrus->ttm.bo_global_ref.ref;
70 	global_ref->global_type = DRM_GLOBAL_TTM_BO;
71 	global_ref->size = sizeof(struct ttm_bo_global);
72 	global_ref->init = &ttm_bo_global_init;
73 	global_ref->release = &ttm_bo_global_release;
74 	r = drm_global_item_ref(global_ref);
75 	if (r != 0) {
76 		DRM_ERROR("Failed setting up TTM BO subsystem.\n");
77 		drm_global_item_unref(&cirrus->ttm.mem_global_ref);
78 		return r;
79 	}
80 	return 0;
81 }
82 
83 static void
cirrus_ttm_global_release(struct cirrus_device * cirrus)84 cirrus_ttm_global_release(struct cirrus_device *cirrus)
85 {
86 	if (cirrus->ttm.mem_global_ref.release == NULL)
87 		return;
88 
89 	drm_global_item_unref(&cirrus->ttm.bo_global_ref.ref);
90 	drm_global_item_unref(&cirrus->ttm.mem_global_ref);
91 	cirrus->ttm.mem_global_ref.release = NULL;
92 }
93 
94 
cirrus_bo_ttm_destroy(struct ttm_buffer_object * tbo)95 static void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
96 {
97 	struct cirrus_bo *bo;
98 
99 	bo = container_of(tbo, struct cirrus_bo, bo);
100 
101 	drm_gem_object_release(&bo->gem);
102 	kfree(bo);
103 }
104 
cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object * bo)105 static bool cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object *bo)
106 {
107 	if (bo->destroy == &cirrus_bo_ttm_destroy)
108 		return true;
109 	return false;
110 }
111 
112 static int
cirrus_bo_init_mem_type(struct ttm_bo_device * bdev,uint32_t type,struct ttm_mem_type_manager * man)113 cirrus_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
114 		     struct ttm_mem_type_manager *man)
115 {
116 	switch (type) {
117 	case TTM_PL_SYSTEM:
118 		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
119 		man->available_caching = TTM_PL_MASK_CACHING;
120 		man->default_caching = TTM_PL_FLAG_CACHED;
121 		break;
122 	case TTM_PL_VRAM:
123 		man->func = &ttm_bo_manager_func;
124 		man->flags = TTM_MEMTYPE_FLAG_FIXED |
125 			TTM_MEMTYPE_FLAG_MAPPABLE;
126 		man->available_caching = TTM_PL_FLAG_UNCACHED |
127 			TTM_PL_FLAG_WC;
128 		man->default_caching = TTM_PL_FLAG_WC;
129 		break;
130 	default:
131 		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
132 		return -EINVAL;
133 	}
134 	return 0;
135 }
136 
137 static void
cirrus_bo_evict_flags(struct ttm_buffer_object * bo,struct ttm_placement * pl)138 cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
139 {
140 	struct cirrus_bo *cirrusbo = cirrus_bo(bo);
141 
142 	if (!cirrus_ttm_bo_is_cirrus_bo(bo))
143 		return;
144 
145 	cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
146 	*pl = cirrusbo->placement;
147 }
148 
cirrus_bo_verify_access(struct ttm_buffer_object * bo,struct file * filp)149 static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
150 {
151 	struct cirrus_bo *cirrusbo = cirrus_bo(bo);
152 
153 	return drm_vma_node_verify_access(&cirrusbo->gem.vma_node, filp);
154 }
155 
cirrus_ttm_io_mem_reserve(struct ttm_bo_device * bdev,struct ttm_mem_reg * mem)156 static int cirrus_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
157 				  struct ttm_mem_reg *mem)
158 {
159 	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
160 	struct cirrus_device *cirrus = cirrus_bdev(bdev);
161 
162 	mem->bus.addr = NULL;
163 	mem->bus.offset = 0;
164 	mem->bus.size = mem->num_pages << PAGE_SHIFT;
165 	mem->bus.base = 0;
166 	mem->bus.is_iomem = false;
167 	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
168 		return -EINVAL;
169 	switch (mem->mem_type) {
170 	case TTM_PL_SYSTEM:
171 		/* system memory */
172 		return 0;
173 	case TTM_PL_VRAM:
174 		mem->bus.offset = mem->start << PAGE_SHIFT;
175 		mem->bus.base = pci_resource_start(cirrus->dev->pdev, 0);
176 		mem->bus.is_iomem = true;
177 		break;
178 	default:
179 		return -EINVAL;
180 		break;
181 	}
182 	return 0;
183 }
184 
cirrus_ttm_io_mem_free(struct ttm_bo_device * bdev,struct ttm_mem_reg * mem)185 static void cirrus_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
186 {
187 }
188 
cirrus_bo_move(struct ttm_buffer_object * bo,bool evict,bool interruptible,bool no_wait_gpu,struct ttm_mem_reg * new_mem)189 static int cirrus_bo_move(struct ttm_buffer_object *bo,
190 		       bool evict, bool interruptible,
191 		       bool no_wait_gpu,
192 		       struct ttm_mem_reg *new_mem)
193 {
194 	int r;
195 	r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
196 	return r;
197 }
198 
199 
cirrus_ttm_backend_destroy(struct ttm_tt * tt)200 static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
201 {
202 	ttm_tt_fini(tt);
203 	kfree(tt);
204 }
205 
206 static struct ttm_backend_func cirrus_tt_backend_func = {
207 	.destroy = &cirrus_ttm_backend_destroy,
208 };
209 
210 
cirrus_ttm_tt_create(struct ttm_bo_device * bdev,unsigned long size,uint32_t page_flags,struct page * dummy_read_page)211 static struct ttm_tt *cirrus_ttm_tt_create(struct ttm_bo_device *bdev,
212 				 unsigned long size, uint32_t page_flags,
213 				 struct page *dummy_read_page)
214 {
215 	struct ttm_tt *tt;
216 
217 	tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
218 	if (tt == NULL)
219 		return NULL;
220 	tt->func = &cirrus_tt_backend_func;
221 	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
222 		kfree(tt);
223 		return NULL;
224 	}
225 	return tt;
226 }
227 
cirrus_ttm_tt_populate(struct ttm_tt * ttm)228 static int cirrus_ttm_tt_populate(struct ttm_tt *ttm)
229 {
230 	return ttm_pool_populate(ttm);
231 }
232 
cirrus_ttm_tt_unpopulate(struct ttm_tt * ttm)233 static void cirrus_ttm_tt_unpopulate(struct ttm_tt *ttm)
234 {
235 	ttm_pool_unpopulate(ttm);
236 }
237 
238 struct ttm_bo_driver cirrus_bo_driver = {
239 	.ttm_tt_create = cirrus_ttm_tt_create,
240 	.ttm_tt_populate = cirrus_ttm_tt_populate,
241 	.ttm_tt_unpopulate = cirrus_ttm_tt_unpopulate,
242 	.init_mem_type = cirrus_bo_init_mem_type,
243 	.evict_flags = cirrus_bo_evict_flags,
244 	.move = cirrus_bo_move,
245 	.verify_access = cirrus_bo_verify_access,
246 	.io_mem_reserve = &cirrus_ttm_io_mem_reserve,
247 	.io_mem_free = &cirrus_ttm_io_mem_free,
248 };
249 
cirrus_mm_init(struct cirrus_device * cirrus)250 int cirrus_mm_init(struct cirrus_device *cirrus)
251 {
252 	int ret;
253 	struct drm_device *dev = cirrus->dev;
254 	struct ttm_bo_device *bdev = &cirrus->ttm.bdev;
255 
256 	ret = cirrus_ttm_global_init(cirrus);
257 	if (ret)
258 		return ret;
259 
260 	ret = ttm_bo_device_init(&cirrus->ttm.bdev,
261 				 cirrus->ttm.bo_global_ref.ref.object,
262 				 &cirrus_bo_driver,
263 				 dev->anon_inode->i_mapping,
264 				 DRM_FILE_PAGE_OFFSET,
265 				 true);
266 	if (ret) {
267 		DRM_ERROR("Error initialising bo driver; %d\n", ret);
268 		return ret;
269 	}
270 
271 	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
272 			     cirrus->mc.vram_size >> PAGE_SHIFT);
273 	if (ret) {
274 		DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
275 		return ret;
276 	}
277 
278 	cirrus->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
279 					   pci_resource_len(dev->pdev, 0));
280 
281 	cirrus->mm_inited = true;
282 	return 0;
283 }
284 
cirrus_mm_fini(struct cirrus_device * cirrus)285 void cirrus_mm_fini(struct cirrus_device *cirrus)
286 {
287 	if (!cirrus->mm_inited)
288 		return;
289 
290 	ttm_bo_device_release(&cirrus->ttm.bdev);
291 
292 	cirrus_ttm_global_release(cirrus);
293 
294 	arch_phys_wc_del(cirrus->fb_mtrr);
295 	cirrus->fb_mtrr = 0;
296 }
297 
cirrus_ttm_placement(struct cirrus_bo * bo,int domain)298 void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
299 {
300 	u32 c = 0;
301 	unsigned i;
302 	bo->placement.placement = bo->placements;
303 	bo->placement.busy_placement = bo->placements;
304 	if (domain & TTM_PL_FLAG_VRAM)
305 		bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
306 	if (domain & TTM_PL_FLAG_SYSTEM)
307 		bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
308 	if (!c)
309 		bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
310 	bo->placement.num_placement = c;
311 	bo->placement.num_busy_placement = c;
312 	for (i = 0; i < c; ++i) {
313 		bo->placements[i].fpfn = 0;
314 		bo->placements[i].lpfn = 0;
315 	}
316 }
317 
cirrus_bo_create(struct drm_device * dev,int size,int align,uint32_t flags,struct cirrus_bo ** pcirrusbo)318 int cirrus_bo_create(struct drm_device *dev, int size, int align,
319 		  uint32_t flags, struct cirrus_bo **pcirrusbo)
320 {
321 	struct cirrus_device *cirrus = dev->dev_private;
322 	struct cirrus_bo *cirrusbo;
323 	size_t acc_size;
324 	int ret;
325 
326 	cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
327 	if (!cirrusbo)
328 		return -ENOMEM;
329 
330 	ret = drm_gem_object_init(dev, &cirrusbo->gem, size);
331 	if (ret) {
332 		kfree(cirrusbo);
333 		return ret;
334 	}
335 
336 	cirrusbo->bo.bdev = &cirrus->ttm.bdev;
337 
338 	cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
339 
340 	acc_size = ttm_bo_dma_acc_size(&cirrus->ttm.bdev, size,
341 				       sizeof(struct cirrus_bo));
342 
343 	ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
344 			  ttm_bo_type_device, &cirrusbo->placement,
345 			  align >> PAGE_SHIFT, false, NULL, acc_size,
346 			  NULL, NULL, cirrus_bo_ttm_destroy);
347 	if (ret)
348 		return ret;
349 
350 	*pcirrusbo = cirrusbo;
351 	return 0;
352 }
353 
cirrus_bo_gpu_offset(struct cirrus_bo * bo)354 static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
355 {
356 	return bo->bo.offset;
357 }
358 
cirrus_bo_pin(struct cirrus_bo * bo,u32 pl_flag,u64 * gpu_addr)359 int cirrus_bo_pin(struct cirrus_bo *bo, u32 pl_flag, u64 *gpu_addr)
360 {
361 	int i, ret;
362 
363 	if (bo->pin_count) {
364 		bo->pin_count++;
365 		if (gpu_addr)
366 			*gpu_addr = cirrus_bo_gpu_offset(bo);
367 	}
368 
369 	cirrus_ttm_placement(bo, pl_flag);
370 	for (i = 0; i < bo->placement.num_placement; i++)
371 		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
372 	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
373 	if (ret)
374 		return ret;
375 
376 	bo->pin_count = 1;
377 	if (gpu_addr)
378 		*gpu_addr = cirrus_bo_gpu_offset(bo);
379 	return 0;
380 }
381 
cirrus_bo_push_sysram(struct cirrus_bo * bo)382 int cirrus_bo_push_sysram(struct cirrus_bo *bo)
383 {
384 	int i, ret;
385 	if (!bo->pin_count) {
386 		DRM_ERROR("unpin bad %p\n", bo);
387 		return 0;
388 	}
389 	bo->pin_count--;
390 	if (bo->pin_count)
391 		return 0;
392 
393 	if (bo->kmap.virtual)
394 		ttm_bo_kunmap(&bo->kmap);
395 
396 	cirrus_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
397 	for (i = 0; i < bo->placement.num_placement ; i++)
398 		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
399 
400 	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
401 	if (ret) {
402 		DRM_ERROR("pushing to VRAM failed\n");
403 		return ret;
404 	}
405 	return 0;
406 }
407 
cirrus_mmap(struct file * filp,struct vm_area_struct * vma)408 int cirrus_mmap(struct file *filp, struct vm_area_struct *vma)
409 {
410 	struct drm_file *file_priv;
411 	struct cirrus_device *cirrus;
412 
413 	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
414 		return -EINVAL;
415 
416 	file_priv = filp->private_data;
417 	cirrus = file_priv->minor->dev->dev_private;
418 	return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
419 }
420