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1 /*
2  * Copyright 2013 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 "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
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 NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Dave Airlie
23  *          Alon Levy
24  */
25 
26 #include "qxl_drv.h"
27 #include "qxl_object.h"
28 
29 #include <linux/io-mapping.h>
qxl_ttm_bo_destroy(struct ttm_buffer_object * tbo)30 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
31 {
32 	struct qxl_bo *bo;
33 	struct qxl_device *qdev;
34 
35 	bo = container_of(tbo, struct qxl_bo, tbo);
36 	qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
37 
38 	qxl_surface_evict(qdev, bo, false);
39 	qxl_fence_fini(&bo->fence);
40 	mutex_lock(&qdev->gem.mutex);
41 	list_del_init(&bo->list);
42 	mutex_unlock(&qdev->gem.mutex);
43 	drm_gem_object_release(&bo->gem_base);
44 	kfree(bo);
45 }
46 
qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object * bo)47 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
48 {
49 	if (bo->destroy == &qxl_ttm_bo_destroy)
50 		return true;
51 	return false;
52 }
53 
qxl_ttm_placement_from_domain(struct qxl_bo * qbo,u32 domain)54 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain)
55 {
56 	u32 c = 0;
57 
58 	qbo->placement.fpfn = 0;
59 	qbo->placement.lpfn = 0;
60 	qbo->placement.placement = qbo->placements;
61 	qbo->placement.busy_placement = qbo->placements;
62 	if (domain == QXL_GEM_DOMAIN_VRAM)
63 		qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM;
64 	if (domain == QXL_GEM_DOMAIN_SURFACE)
65 		qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV0;
66 	if (domain == QXL_GEM_DOMAIN_CPU)
67 		qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
68 	if (!c)
69 		qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
70 	qbo->placement.num_placement = c;
71 	qbo->placement.num_busy_placement = c;
72 }
73 
74 
qxl_bo_create(struct qxl_device * qdev,unsigned long size,bool kernel,u32 domain,struct qxl_surface * surf,struct qxl_bo ** bo_ptr)75 int qxl_bo_create(struct qxl_device *qdev,
76 		  unsigned long size, bool kernel, u32 domain,
77 		  struct qxl_surface *surf,
78 		  struct qxl_bo **bo_ptr)
79 {
80 	struct qxl_bo *bo;
81 	enum ttm_bo_type type;
82 	int r;
83 
84 	if (unlikely(qdev->mman.bdev.dev_mapping == NULL))
85 		qdev->mman.bdev.dev_mapping = qdev->ddev->dev_mapping;
86 	if (kernel)
87 		type = ttm_bo_type_kernel;
88 	else
89 		type = ttm_bo_type_device;
90 	*bo_ptr = NULL;
91 	bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
92 	if (bo == NULL)
93 		return -ENOMEM;
94 	size = roundup(size, PAGE_SIZE);
95 	r = drm_gem_object_init(qdev->ddev, &bo->gem_base, size);
96 	if (unlikely(r)) {
97 		kfree(bo);
98 		return r;
99 	}
100 	bo->gem_base.driver_private = NULL;
101 	bo->type = domain;
102 	bo->pin_count = 0;
103 	bo->surface_id = 0;
104 	qxl_fence_init(qdev, &bo->fence);
105 	INIT_LIST_HEAD(&bo->list);
106 	atomic_set(&bo->reserve_count, 0);
107 	if (surf)
108 		bo->surf = *surf;
109 
110 	qxl_ttm_placement_from_domain(bo, domain);
111 
112 	r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
113 			&bo->placement, 0, !kernel, NULL, size,
114 			NULL, &qxl_ttm_bo_destroy);
115 	if (unlikely(r != 0)) {
116 		if (r != -ERESTARTSYS)
117 			dev_err(qdev->dev,
118 				"object_init failed for (%lu, 0x%08X)\n",
119 				size, domain);
120 		return r;
121 	}
122 	*bo_ptr = bo;
123 	return 0;
124 }
125 
qxl_bo_kmap(struct qxl_bo * bo,void ** ptr)126 int qxl_bo_kmap(struct qxl_bo *bo, void **ptr)
127 {
128 	bool is_iomem;
129 	int r;
130 
131 	if (bo->kptr) {
132 		if (ptr)
133 			*ptr = bo->kptr;
134 		return 0;
135 	}
136 	r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
137 	if (r)
138 		return r;
139 	bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
140 	if (ptr)
141 		*ptr = bo->kptr;
142 	return 0;
143 }
144 
qxl_bo_kmap_atomic_page(struct qxl_device * qdev,struct qxl_bo * bo,int page_offset)145 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
146 			      struct qxl_bo *bo, int page_offset)
147 {
148 	struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
149 	void *rptr;
150 	int ret;
151 	struct io_mapping *map;
152 
153 	if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
154 		map = qdev->vram_mapping;
155 	else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
156 		map = qdev->surface_mapping;
157 	else
158 		goto fallback;
159 
160 	(void) ttm_mem_io_lock(man, false);
161 	ret = ttm_mem_io_reserve(bo->tbo.bdev, &bo->tbo.mem);
162 	ttm_mem_io_unlock(man);
163 
164 	return io_mapping_map_atomic_wc(map, bo->tbo.mem.bus.offset + page_offset);
165 fallback:
166 	if (bo->kptr) {
167 		rptr = bo->kptr + (page_offset * PAGE_SIZE);
168 		return rptr;
169 	}
170 
171 	ret = qxl_bo_kmap(bo, &rptr);
172 	if (ret)
173 		return NULL;
174 
175 	rptr += page_offset * PAGE_SIZE;
176 	return rptr;
177 }
178 
qxl_bo_kunmap(struct qxl_bo * bo)179 void qxl_bo_kunmap(struct qxl_bo *bo)
180 {
181 	if (bo->kptr == NULL)
182 		return;
183 	bo->kptr = NULL;
184 	ttm_bo_kunmap(&bo->kmap);
185 }
186 
qxl_bo_kunmap_atomic_page(struct qxl_device * qdev,struct qxl_bo * bo,void * pmap)187 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
188 			       struct qxl_bo *bo, void *pmap)
189 {
190 	struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
191 	struct io_mapping *map;
192 
193 	if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
194 		map = qdev->vram_mapping;
195 	else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
196 		map = qdev->surface_mapping;
197 	else
198 		goto fallback;
199 
200 	io_mapping_unmap_atomic(pmap);
201 
202 	(void) ttm_mem_io_lock(man, false);
203 	ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem);
204 	ttm_mem_io_unlock(man);
205 	return ;
206  fallback:
207 	qxl_bo_kunmap(bo);
208 }
209 
qxl_bo_unref(struct qxl_bo ** bo)210 void qxl_bo_unref(struct qxl_bo **bo)
211 {
212 	struct ttm_buffer_object *tbo;
213 
214 	if ((*bo) == NULL)
215 		return;
216 	tbo = &((*bo)->tbo);
217 	ttm_bo_unref(&tbo);
218 	if (tbo == NULL)
219 		*bo = NULL;
220 }
221 
qxl_bo_ref(struct qxl_bo * bo)222 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
223 {
224 	ttm_bo_reference(&bo->tbo);
225 	return bo;
226 }
227 
qxl_bo_pin(struct qxl_bo * bo,u32 domain,u64 * gpu_addr)228 int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr)
229 {
230 	struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
231 	int r, i;
232 
233 	if (bo->pin_count) {
234 		bo->pin_count++;
235 		if (gpu_addr)
236 			*gpu_addr = qxl_bo_gpu_offset(bo);
237 		return 0;
238 	}
239 	qxl_ttm_placement_from_domain(bo, domain);
240 	for (i = 0; i < bo->placement.num_placement; i++)
241 		bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
242 	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
243 	if (likely(r == 0)) {
244 		bo->pin_count = 1;
245 		if (gpu_addr != NULL)
246 			*gpu_addr = qxl_bo_gpu_offset(bo);
247 	}
248 	if (unlikely(r != 0))
249 		dev_err(qdev->dev, "%p pin failed\n", bo);
250 	return r;
251 }
252 
qxl_bo_unpin(struct qxl_bo * bo)253 int qxl_bo_unpin(struct qxl_bo *bo)
254 {
255 	struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
256 	int r, i;
257 
258 	if (!bo->pin_count) {
259 		dev_warn(qdev->dev, "%p unpin not necessary\n", bo);
260 		return 0;
261 	}
262 	bo->pin_count--;
263 	if (bo->pin_count)
264 		return 0;
265 	for (i = 0; i < bo->placement.num_placement; i++)
266 		bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
267 	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
268 	if (unlikely(r != 0))
269 		dev_err(qdev->dev, "%p validate failed for unpin\n", bo);
270 	return r;
271 }
272 
qxl_bo_force_delete(struct qxl_device * qdev)273 void qxl_bo_force_delete(struct qxl_device *qdev)
274 {
275 	struct qxl_bo *bo, *n;
276 
277 	if (list_empty(&qdev->gem.objects))
278 		return;
279 	dev_err(qdev->dev, "Userspace still has active objects !\n");
280 	list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
281 		mutex_lock(&qdev->ddev->struct_mutex);
282 		dev_err(qdev->dev, "%p %p %lu %lu force free\n",
283 			&bo->gem_base, bo, (unsigned long)bo->gem_base.size,
284 			*((unsigned long *)&bo->gem_base.refcount));
285 		mutex_lock(&qdev->gem.mutex);
286 		list_del_init(&bo->list);
287 		mutex_unlock(&qdev->gem.mutex);
288 		/* this should unref the ttm bo */
289 		drm_gem_object_unreference(&bo->gem_base);
290 		mutex_unlock(&qdev->ddev->struct_mutex);
291 	}
292 }
293 
qxl_bo_init(struct qxl_device * qdev)294 int qxl_bo_init(struct qxl_device *qdev)
295 {
296 	return qxl_ttm_init(qdev);
297 }
298 
qxl_bo_fini(struct qxl_device * qdev)299 void qxl_bo_fini(struct qxl_device *qdev)
300 {
301 	qxl_ttm_fini(qdev);
302 }
303 
qxl_bo_check_id(struct qxl_device * qdev,struct qxl_bo * bo)304 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
305 {
306 	int ret;
307 	if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
308 		/* allocate a surface id for this surface now */
309 		ret = qxl_surface_id_alloc(qdev, bo);
310 		if (ret)
311 			return ret;
312 
313 		ret = qxl_hw_surface_alloc(qdev, bo, NULL);
314 		if (ret)
315 			return ret;
316 	}
317 	return 0;
318 }
319 
qxl_bo_list_unreserve(struct qxl_reloc_list * reloc_list,bool failed)320 void qxl_bo_list_unreserve(struct qxl_reloc_list *reloc_list, bool failed)
321 {
322 	struct qxl_bo_list *entry, *sf;
323 
324 	list_for_each_entry_safe(entry, sf, &reloc_list->bos, lhead) {
325 		qxl_bo_unreserve(entry->bo);
326 		list_del(&entry->lhead);
327 		kfree(entry);
328 	}
329 }
330 
qxl_bo_list_add(struct qxl_reloc_list * reloc_list,struct qxl_bo * bo)331 int qxl_bo_list_add(struct qxl_reloc_list *reloc_list, struct qxl_bo *bo)
332 {
333 	struct qxl_bo_list *entry;
334 	int ret;
335 
336 	list_for_each_entry(entry, &reloc_list->bos, lhead) {
337 		if (entry->bo == bo)
338 			return 0;
339 	}
340 
341 	entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL);
342 	if (!entry)
343 		return -ENOMEM;
344 
345 	entry->bo = bo;
346 	list_add(&entry->lhead, &reloc_list->bos);
347 
348 	ret = qxl_bo_reserve(bo, false);
349 	if (ret)
350 		return ret;
351 
352 	if (!bo->pin_count) {
353 		qxl_ttm_placement_from_domain(bo, bo->type);
354 		ret = ttm_bo_validate(&bo->tbo, &bo->placement,
355 				      true, false);
356 		if (ret)
357 			return ret;
358 	}
359 
360 	/* allocate a surface for reserved + validated buffers */
361 	ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo);
362 	if (ret)
363 		return ret;
364 	return 0;
365 }
366