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 <linux/iosys-map.h>
27 #include <linux/io-mapping.h>
28 
29 #include "qxl_drv.h"
30 #include "qxl_object.h"
31 
32 static int __qxl_bo_pin(struct qxl_bo *bo);
33 static void __qxl_bo_unpin(struct qxl_bo *bo);
34 
qxl_ttm_bo_destroy(struct ttm_buffer_object * tbo)35 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
36 {
37 	struct qxl_bo *bo;
38 	struct qxl_device *qdev;
39 
40 	bo = to_qxl_bo(tbo);
41 	qdev = to_qxl(bo->tbo.base.dev);
42 
43 	qxl_surface_evict(qdev, bo, false);
44 	WARN_ON_ONCE(bo->map_count > 0);
45 	mutex_lock(&qdev->gem.mutex);
46 	list_del_init(&bo->list);
47 	mutex_unlock(&qdev->gem.mutex);
48 	drm_gem_object_release(&bo->tbo.base);
49 	kfree(bo);
50 }
51 
qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object * bo)52 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
53 {
54 	if (bo->destroy == &qxl_ttm_bo_destroy)
55 		return true;
56 	return false;
57 }
58 
qxl_ttm_placement_from_domain(struct qxl_bo * qbo,u32 domain)59 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain)
60 {
61 	u32 c = 0;
62 	u32 pflag = 0;
63 	unsigned int i;
64 
65 	if (qbo->tbo.base.size <= PAGE_SIZE)
66 		pflag |= TTM_PL_FLAG_TOPDOWN;
67 
68 	qbo->placement.placement = qbo->placements;
69 	qbo->placement.busy_placement = qbo->placements;
70 	if (domain == QXL_GEM_DOMAIN_VRAM) {
71 		qbo->placements[c].mem_type = TTM_PL_VRAM;
72 		qbo->placements[c++].flags = pflag;
73 	}
74 	if (domain == QXL_GEM_DOMAIN_SURFACE) {
75 		qbo->placements[c].mem_type = TTM_PL_PRIV;
76 		qbo->placements[c++].flags = pflag;
77 		qbo->placements[c].mem_type = TTM_PL_VRAM;
78 		qbo->placements[c++].flags = pflag;
79 	}
80 	if (domain == QXL_GEM_DOMAIN_CPU) {
81 		qbo->placements[c].mem_type = TTM_PL_SYSTEM;
82 		qbo->placements[c++].flags = pflag;
83 	}
84 	if (!c) {
85 		qbo->placements[c].mem_type = TTM_PL_SYSTEM;
86 		qbo->placements[c++].flags = 0;
87 	}
88 	qbo->placement.num_placement = c;
89 	qbo->placement.num_busy_placement = c;
90 	for (i = 0; i < c; ++i) {
91 		qbo->placements[i].fpfn = 0;
92 		qbo->placements[i].lpfn = 0;
93 	}
94 }
95 
96 static const struct drm_gem_object_funcs qxl_object_funcs = {
97 	.free = qxl_gem_object_free,
98 	.open = qxl_gem_object_open,
99 	.close = qxl_gem_object_close,
100 	.pin = qxl_gem_prime_pin,
101 	.unpin = qxl_gem_prime_unpin,
102 	.get_sg_table = qxl_gem_prime_get_sg_table,
103 	.vmap = qxl_gem_prime_vmap,
104 	.vunmap = qxl_gem_prime_vunmap,
105 	.mmap = drm_gem_ttm_mmap,
106 	.print_info = drm_gem_ttm_print_info,
107 };
108 
qxl_bo_create(struct qxl_device * qdev,unsigned long size,bool kernel,bool pinned,u32 domain,u32 priority,struct qxl_surface * surf,struct qxl_bo ** bo_ptr)109 int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
110 		  bool kernel, bool pinned, u32 domain, u32 priority,
111 		  struct qxl_surface *surf,
112 		  struct qxl_bo **bo_ptr)
113 {
114 	struct ttm_operation_ctx ctx = { !kernel, false };
115 	struct qxl_bo *bo;
116 	enum ttm_bo_type type;
117 	int r;
118 
119 	if (kernel)
120 		type = ttm_bo_type_kernel;
121 	else
122 		type = ttm_bo_type_device;
123 	*bo_ptr = NULL;
124 	bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
125 	if (bo == NULL)
126 		return -ENOMEM;
127 	size = roundup(size, PAGE_SIZE);
128 	r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size);
129 	if (unlikely(r)) {
130 		kfree(bo);
131 		return r;
132 	}
133 	bo->tbo.base.funcs = &qxl_object_funcs;
134 	bo->type = domain;
135 	bo->surface_id = 0;
136 	INIT_LIST_HEAD(&bo->list);
137 
138 	if (surf)
139 		bo->surf = *surf;
140 
141 	qxl_ttm_placement_from_domain(bo, domain);
142 
143 	bo->tbo.priority = priority;
144 	r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, type,
145 				 &bo->placement, 0, &ctx, NULL, NULL,
146 				 &qxl_ttm_bo_destroy);
147 	if (unlikely(r != 0)) {
148 		if (r != -ERESTARTSYS)
149 			dev_err(qdev->ddev.dev,
150 				"object_init failed for (%lu, 0x%08X)\n",
151 				size, domain);
152 		return r;
153 	}
154 	if (pinned)
155 		ttm_bo_pin(&bo->tbo);
156 	ttm_bo_unreserve(&bo->tbo);
157 	*bo_ptr = bo;
158 	return 0;
159 }
160 
qxl_bo_vmap_locked(struct qxl_bo * bo,struct iosys_map * map)161 int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map)
162 {
163 	int r;
164 
165 	dma_resv_assert_held(bo->tbo.base.resv);
166 
167 	if (bo->kptr) {
168 		bo->map_count++;
169 		goto out;
170 	}
171 
172 	r = __qxl_bo_pin(bo);
173 	if (r)
174 		return r;
175 
176 	r = ttm_bo_vmap(&bo->tbo, &bo->map);
177 	if (r) {
178 		__qxl_bo_unpin(bo);
179 		return r;
180 	}
181 	bo->map_count = 1;
182 
183 	/* TODO: Remove kptr in favor of map everywhere. */
184 	if (bo->map.is_iomem)
185 		bo->kptr = (void *)bo->map.vaddr_iomem;
186 	else
187 		bo->kptr = bo->map.vaddr;
188 
189 out:
190 	*map = bo->map;
191 	return 0;
192 }
193 
qxl_bo_vmap(struct qxl_bo * bo,struct iosys_map * map)194 int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map)
195 {
196 	int r;
197 
198 	r = qxl_bo_reserve(bo);
199 	if (r)
200 		return r;
201 
202 	r = qxl_bo_vmap_locked(bo, map);
203 	qxl_bo_unreserve(bo);
204 	return r;
205 }
206 
qxl_bo_kmap_atomic_page(struct qxl_device * qdev,struct qxl_bo * bo,int page_offset)207 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
208 			      struct qxl_bo *bo, int page_offset)
209 {
210 	unsigned long offset;
211 	void *rptr;
212 	int ret;
213 	struct io_mapping *map;
214 	struct iosys_map bo_map;
215 
216 	if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
217 		map = qdev->vram_mapping;
218 	else if (bo->tbo.resource->mem_type == TTM_PL_PRIV)
219 		map = qdev->surface_mapping;
220 	else
221 		goto fallback;
222 
223 	offset = bo->tbo.resource->start << PAGE_SHIFT;
224 	return io_mapping_map_atomic_wc(map, offset + page_offset);
225 fallback:
226 	if (bo->kptr) {
227 		rptr = bo->kptr + (page_offset * PAGE_SIZE);
228 		return rptr;
229 	}
230 
231 	ret = qxl_bo_vmap_locked(bo, &bo_map);
232 	if (ret)
233 		return NULL;
234 	rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
235 
236 	rptr += page_offset * PAGE_SIZE;
237 	return rptr;
238 }
239 
qxl_bo_vunmap_locked(struct qxl_bo * bo)240 void qxl_bo_vunmap_locked(struct qxl_bo *bo)
241 {
242 	dma_resv_assert_held(bo->tbo.base.resv);
243 
244 	if (bo->kptr == NULL)
245 		return;
246 	bo->map_count--;
247 	if (bo->map_count > 0)
248 		return;
249 	bo->kptr = NULL;
250 	ttm_bo_vunmap(&bo->tbo, &bo->map);
251 	__qxl_bo_unpin(bo);
252 }
253 
qxl_bo_vunmap(struct qxl_bo * bo)254 int qxl_bo_vunmap(struct qxl_bo *bo)
255 {
256 	int r;
257 
258 	r = qxl_bo_reserve(bo);
259 	if (r)
260 		return r;
261 
262 	qxl_bo_vunmap_locked(bo);
263 	qxl_bo_unreserve(bo);
264 	return 0;
265 }
266 
qxl_bo_kunmap_atomic_page(struct qxl_device * qdev,struct qxl_bo * bo,void * pmap)267 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
268 			       struct qxl_bo *bo, void *pmap)
269 {
270 	if ((bo->tbo.resource->mem_type != TTM_PL_VRAM) &&
271 	    (bo->tbo.resource->mem_type != TTM_PL_PRIV))
272 		goto fallback;
273 
274 	io_mapping_unmap_atomic(pmap);
275 	return;
276  fallback:
277 	qxl_bo_vunmap_locked(bo);
278 }
279 
qxl_bo_unref(struct qxl_bo ** bo)280 void qxl_bo_unref(struct qxl_bo **bo)
281 {
282 	if ((*bo) == NULL)
283 		return;
284 
285 	drm_gem_object_put(&(*bo)->tbo.base);
286 	*bo = NULL;
287 }
288 
qxl_bo_ref(struct qxl_bo * bo)289 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
290 {
291 	drm_gem_object_get(&bo->tbo.base);
292 	return bo;
293 }
294 
__qxl_bo_pin(struct qxl_bo * bo)295 static int __qxl_bo_pin(struct qxl_bo *bo)
296 {
297 	struct ttm_operation_ctx ctx = { false, false };
298 	struct drm_device *ddev = bo->tbo.base.dev;
299 	int r;
300 
301 	if (bo->tbo.pin_count) {
302 		ttm_bo_pin(&bo->tbo);
303 		return 0;
304 	}
305 	qxl_ttm_placement_from_domain(bo, bo->type);
306 	r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
307 	if (likely(r == 0))
308 		ttm_bo_pin(&bo->tbo);
309 	if (unlikely(r != 0))
310 		dev_err(ddev->dev, "%p pin failed\n", bo);
311 	return r;
312 }
313 
__qxl_bo_unpin(struct qxl_bo * bo)314 static void __qxl_bo_unpin(struct qxl_bo *bo)
315 {
316 	ttm_bo_unpin(&bo->tbo);
317 }
318 
319 /*
320  * Reserve the BO before pinning the object.  If the BO was reserved
321  * beforehand, use the internal version directly __qxl_bo_pin.
322  *
323  */
qxl_bo_pin(struct qxl_bo * bo)324 int qxl_bo_pin(struct qxl_bo *bo)
325 {
326 	int r;
327 
328 	r = qxl_bo_reserve(bo);
329 	if (r)
330 		return r;
331 
332 	r = __qxl_bo_pin(bo);
333 	qxl_bo_unreserve(bo);
334 	return r;
335 }
336 
337 /*
338  * Reserve the BO before pinning the object.  If the BO was reserved
339  * beforehand, use the internal version directly __qxl_bo_unpin.
340  *
341  */
qxl_bo_unpin(struct qxl_bo * bo)342 int qxl_bo_unpin(struct qxl_bo *bo)
343 {
344 	int r;
345 
346 	r = qxl_bo_reserve(bo);
347 	if (r)
348 		return r;
349 
350 	__qxl_bo_unpin(bo);
351 	qxl_bo_unreserve(bo);
352 	return 0;
353 }
354 
qxl_bo_force_delete(struct qxl_device * qdev)355 void qxl_bo_force_delete(struct qxl_device *qdev)
356 {
357 	struct qxl_bo *bo, *n;
358 
359 	if (list_empty(&qdev->gem.objects))
360 		return;
361 	dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
362 	list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
363 		dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
364 			&bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
365 			*((unsigned long *)&bo->tbo.base.refcount));
366 		mutex_lock(&qdev->gem.mutex);
367 		list_del_init(&bo->list);
368 		mutex_unlock(&qdev->gem.mutex);
369 		/* this should unref the ttm bo */
370 		drm_gem_object_put(&bo->tbo.base);
371 	}
372 }
373 
qxl_bo_init(struct qxl_device * qdev)374 int qxl_bo_init(struct qxl_device *qdev)
375 {
376 	return qxl_ttm_init(qdev);
377 }
378 
qxl_bo_fini(struct qxl_device * qdev)379 void qxl_bo_fini(struct qxl_device *qdev)
380 {
381 	qxl_ttm_fini(qdev);
382 }
383 
qxl_bo_check_id(struct qxl_device * qdev,struct qxl_bo * bo)384 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
385 {
386 	int ret;
387 
388 	if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
389 		/* allocate a surface id for this surface now */
390 		ret = qxl_surface_id_alloc(qdev, bo);
391 		if (ret)
392 			return ret;
393 
394 		ret = qxl_hw_surface_alloc(qdev, bo);
395 		if (ret)
396 			return ret;
397 	}
398 	return 0;
399 }
400 
qxl_surf_evict(struct qxl_device * qdev)401 int qxl_surf_evict(struct qxl_device *qdev)
402 {
403 	struct ttm_resource_manager *man;
404 
405 	man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
406 	return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
407 }
408 
qxl_vram_evict(struct qxl_device * qdev)409 int qxl_vram_evict(struct qxl_device *qdev)
410 {
411 	struct ttm_resource_manager *man;
412 
413 	man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
414 	return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
415 }
416