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b42fe9ca JL |
1 | /* |
2 | * Copyright © 2016 Intel Corporation | |
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 (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include "i915_vma.h" | |
26 | ||
27 | #include "i915_drv.h" | |
28 | #include "intel_ringbuffer.h" | |
29 | #include "intel_frontbuffer.h" | |
30 | ||
31 | #include <drm/drm_gem.h> | |
32 | ||
33 | static void | |
34 | i915_vma_retire(struct i915_gem_active *active, | |
35 | struct drm_i915_gem_request *rq) | |
36 | { | |
37 | const unsigned int idx = rq->engine->id; | |
38 | struct i915_vma *vma = | |
39 | container_of(active, struct i915_vma, last_read[idx]); | |
40 | struct drm_i915_gem_object *obj = vma->obj; | |
41 | ||
42 | GEM_BUG_ON(!i915_vma_has_active_engine(vma, idx)); | |
43 | ||
44 | i915_vma_clear_active(vma, idx); | |
45 | if (i915_vma_is_active(vma)) | |
46 | return; | |
47 | ||
44a0ec0d | 48 | GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
b42fe9ca JL |
49 | list_move_tail(&vma->vm_link, &vma->vm->inactive_list); |
50 | if (unlikely(i915_vma_is_closed(vma) && !i915_vma_is_pinned(vma))) | |
51 | WARN_ON(i915_vma_unbind(vma)); | |
52 | ||
53 | GEM_BUG_ON(!i915_gem_object_is_active(obj)); | |
54 | if (--obj->active_count) | |
55 | return; | |
56 | ||
57 | /* Bump our place on the bound list to keep it roughly in LRU order | |
58 | * so that we don't steal from recently used but inactive objects | |
59 | * (unless we are forced to ofc!) | |
60 | */ | |
61 | if (obj->bind_count) | |
62 | list_move_tail(&obj->global_link, &rq->i915->mm.bound_list); | |
63 | ||
64 | obj->mm.dirty = true; /* be paranoid */ | |
65 | ||
66 | if (i915_gem_object_has_active_reference(obj)) { | |
67 | i915_gem_object_clear_active_reference(obj); | |
68 | i915_gem_object_put(obj); | |
69 | } | |
70 | } | |
71 | ||
b42fe9ca | 72 | static struct i915_vma * |
a01cb37a CW |
73 | vma_create(struct drm_i915_gem_object *obj, |
74 | struct i915_address_space *vm, | |
75 | const struct i915_ggtt_view *view) | |
b42fe9ca JL |
76 | { |
77 | struct i915_vma *vma; | |
78 | struct rb_node *rb, **p; | |
79 | int i; | |
80 | ||
e1cc3db0 CW |
81 | /* The aliasing_ppgtt should never be used directly! */ |
82 | GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->base); | |
83 | ||
1fcdaa7e | 84 | vma = kmem_cache_zalloc(vm->i915->vmas, GFP_KERNEL); |
b42fe9ca JL |
85 | if (vma == NULL) |
86 | return ERR_PTR(-ENOMEM); | |
87 | ||
b42fe9ca JL |
88 | for (i = 0; i < ARRAY_SIZE(vma->last_read); i++) |
89 | init_request_active(&vma->last_read[i], i915_vma_retire); | |
b42fe9ca | 90 | init_request_active(&vma->last_fence, NULL); |
b42fe9ca JL |
91 | vma->vm = vm; |
92 | vma->obj = obj; | |
95ff7c7d | 93 | vma->resv = obj->resv; |
b42fe9ca | 94 | vma->size = obj->base.size; |
f51455d4 | 95 | vma->display_alignment = I915_GTT_MIN_ALIGNMENT; |
b42fe9ca | 96 | |
7c518460 | 97 | if (view && view->type != I915_GGTT_VIEW_NORMAL) { |
b42fe9ca JL |
98 | vma->ggtt_view = *view; |
99 | if (view->type == I915_GGTT_VIEW_PARTIAL) { | |
07e19ea4 | 100 | GEM_BUG_ON(range_overflows_t(u64, |
8bab1193 CW |
101 | view->partial.offset, |
102 | view->partial.size, | |
07e19ea4 | 103 | obj->base.size >> PAGE_SHIFT)); |
8bab1193 | 104 | vma->size = view->partial.size; |
b42fe9ca | 105 | vma->size <<= PAGE_SHIFT; |
07e19ea4 | 106 | GEM_BUG_ON(vma->size >= obj->base.size); |
b42fe9ca | 107 | } else if (view->type == I915_GGTT_VIEW_ROTATED) { |
8bab1193 | 108 | vma->size = intel_rotation_info_size(&view->rotated); |
b42fe9ca JL |
109 | vma->size <<= PAGE_SHIFT; |
110 | } | |
111 | } | |
112 | ||
1fcdaa7e CW |
113 | if (unlikely(vma->size > vm->total)) |
114 | goto err_vma; | |
115 | ||
b00ddb27 CW |
116 | GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE)); |
117 | ||
b42fe9ca | 118 | if (i915_is_ggtt(vm)) { |
1fcdaa7e CW |
119 | if (unlikely(overflows_type(vma->size, u32))) |
120 | goto err_vma; | |
121 | ||
91d4e0aa CW |
122 | vma->fence_size = i915_gem_fence_size(vm->i915, vma->size, |
123 | i915_gem_object_get_tiling(obj), | |
124 | i915_gem_object_get_stride(obj)); | |
1fcdaa7e CW |
125 | if (unlikely(vma->fence_size < vma->size || /* overflow */ |
126 | vma->fence_size > vm->total)) | |
127 | goto err_vma; | |
128 | ||
f51455d4 | 129 | GEM_BUG_ON(!IS_ALIGNED(vma->fence_size, I915_GTT_MIN_ALIGNMENT)); |
944397f0 | 130 | |
91d4e0aa CW |
131 | vma->fence_alignment = i915_gem_fence_alignment(vm->i915, vma->size, |
132 | i915_gem_object_get_tiling(obj), | |
133 | i915_gem_object_get_stride(obj)); | |
944397f0 CW |
134 | GEM_BUG_ON(!is_power_of_2(vma->fence_alignment)); |
135 | ||
b42fe9ca JL |
136 | vma->flags |= I915_VMA_GGTT; |
137 | list_add(&vma->obj_link, &obj->vma_list); | |
138 | } else { | |
139 | i915_ppgtt_get(i915_vm_to_ppgtt(vm)); | |
140 | list_add_tail(&vma->obj_link, &obj->vma_list); | |
141 | } | |
142 | ||
143 | rb = NULL; | |
144 | p = &obj->vma_tree.rb_node; | |
145 | while (*p) { | |
146 | struct i915_vma *pos; | |
147 | ||
148 | rb = *p; | |
149 | pos = rb_entry(rb, struct i915_vma, obj_node); | |
150 | if (i915_vma_compare(pos, vm, view) < 0) | |
151 | p = &rb->rb_right; | |
152 | else | |
153 | p = &rb->rb_left; | |
154 | } | |
155 | rb_link_node(&vma->obj_node, rb, p); | |
156 | rb_insert_color(&vma->obj_node, &obj->vma_tree); | |
1fcdaa7e | 157 | list_add(&vma->vm_link, &vm->unbound_list); |
b42fe9ca JL |
158 | |
159 | return vma; | |
1fcdaa7e CW |
160 | |
161 | err_vma: | |
162 | kmem_cache_free(vm->i915->vmas, vma); | |
163 | return ERR_PTR(-E2BIG); | |
b42fe9ca JL |
164 | } |
165 | ||
481a6f7d CW |
166 | static struct i915_vma * |
167 | vma_lookup(struct drm_i915_gem_object *obj, | |
168 | struct i915_address_space *vm, | |
169 | const struct i915_ggtt_view *view) | |
718659a6 CW |
170 | { |
171 | struct rb_node *rb; | |
172 | ||
718659a6 CW |
173 | rb = obj->vma_tree.rb_node; |
174 | while (rb) { | |
175 | struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node); | |
176 | long cmp; | |
177 | ||
178 | cmp = i915_vma_compare(vma, vm, view); | |
179 | if (cmp == 0) | |
180 | return vma; | |
181 | ||
182 | if (cmp < 0) | |
183 | rb = rb->rb_right; | |
184 | else | |
185 | rb = rb->rb_left; | |
186 | } | |
187 | ||
188 | return NULL; | |
189 | } | |
190 | ||
718659a6 CW |
191 | /** |
192 | * i915_vma_instance - return the singleton instance of the VMA | |
193 | * @obj: parent &struct drm_i915_gem_object to be mapped | |
194 | * @vm: address space in which the mapping is located | |
195 | * @view: additional mapping requirements | |
196 | * | |
197 | * i915_vma_instance() looks up an existing VMA of the @obj in the @vm with | |
198 | * the same @view characteristics. If a match is not found, one is created. | |
199 | * Once created, the VMA is kept until either the object is freed, or the | |
200 | * address space is closed. | |
201 | * | |
202 | * Must be called with struct_mutex held. | |
203 | * | |
204 | * Returns the vma, or an error pointer. | |
205 | */ | |
206 | struct i915_vma * | |
207 | i915_vma_instance(struct drm_i915_gem_object *obj, | |
208 | struct i915_address_space *vm, | |
209 | const struct i915_ggtt_view *view) | |
210 | { | |
211 | struct i915_vma *vma; | |
212 | ||
213 | lockdep_assert_held(&obj->base.dev->struct_mutex); | |
214 | GEM_BUG_ON(view && !i915_is_ggtt(vm)); | |
215 | GEM_BUG_ON(vm->closed); | |
216 | ||
481a6f7d | 217 | vma = vma_lookup(obj, vm, view); |
718659a6 | 218 | if (!vma) |
a01cb37a | 219 | vma = vma_create(obj, vm, view); |
718659a6 CW |
220 | |
221 | GEM_BUG_ON(!IS_ERR(vma) && i915_vma_is_closed(vma)); | |
4ea9527c | 222 | GEM_BUG_ON(!IS_ERR(vma) && i915_vma_compare(vma, vm, view)); |
481a6f7d | 223 | GEM_BUG_ON(!IS_ERR(vma) && vma_lookup(obj, vm, view) != vma); |
718659a6 CW |
224 | return vma; |
225 | } | |
226 | ||
b42fe9ca JL |
227 | /** |
228 | * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space. | |
229 | * @vma: VMA to map | |
230 | * @cache_level: mapping cache level | |
231 | * @flags: flags like global or local mapping | |
232 | * | |
233 | * DMA addresses are taken from the scatter-gather table of this object (or of | |
234 | * this VMA in case of non-default GGTT views) and PTE entries set up. | |
235 | * Note that DMA addresses are also the only part of the SG table we care about. | |
236 | */ | |
237 | int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level, | |
238 | u32 flags) | |
239 | { | |
240 | u32 bind_flags; | |
241 | u32 vma_flags; | |
242 | int ret; | |
243 | ||
aa149431 CW |
244 | GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
245 | GEM_BUG_ON(vma->size > vma->node.size); | |
246 | ||
247 | if (GEM_WARN_ON(range_overflows(vma->node.start, | |
248 | vma->node.size, | |
249 | vma->vm->total))) | |
250 | return -ENODEV; | |
251 | ||
252 | if (GEM_WARN_ON(!flags)) | |
b42fe9ca JL |
253 | return -EINVAL; |
254 | ||
255 | bind_flags = 0; | |
256 | if (flags & PIN_GLOBAL) | |
257 | bind_flags |= I915_VMA_GLOBAL_BIND; | |
258 | if (flags & PIN_USER) | |
259 | bind_flags |= I915_VMA_LOCAL_BIND; | |
260 | ||
261 | vma_flags = vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND); | |
262 | if (flags & PIN_UPDATE) | |
263 | bind_flags |= vma_flags; | |
264 | else | |
265 | bind_flags &= ~vma_flags; | |
266 | if (bind_flags == 0) | |
267 | return 0; | |
268 | ||
fa3f46af MA |
269 | GEM_BUG_ON(!vma->pages); |
270 | ||
6146e6da | 271 | trace_i915_vma_bind(vma, bind_flags); |
b42fe9ca JL |
272 | ret = vma->vm->bind_vma(vma, cache_level, bind_flags); |
273 | if (ret) | |
274 | return ret; | |
275 | ||
276 | vma->flags |= bind_flags; | |
277 | return 0; | |
278 | } | |
279 | ||
280 | void __iomem *i915_vma_pin_iomap(struct i915_vma *vma) | |
281 | { | |
282 | void __iomem *ptr; | |
283 | ||
284 | /* Access through the GTT requires the device to be awake. */ | |
49d73912 | 285 | assert_rpm_wakelock_held(vma->vm->i915); |
b42fe9ca | 286 | |
49d73912 | 287 | lockdep_assert_held(&vma->vm->i915->drm.struct_mutex); |
b42fe9ca JL |
288 | if (WARN_ON(!i915_vma_is_map_and_fenceable(vma))) |
289 | return IO_ERR_PTR(-ENODEV); | |
290 | ||
291 | GEM_BUG_ON(!i915_vma_is_ggtt(vma)); | |
292 | GEM_BUG_ON((vma->flags & I915_VMA_GLOBAL_BIND) == 0); | |
293 | ||
294 | ptr = vma->iomap; | |
295 | if (ptr == NULL) { | |
296 | ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->mappable, | |
297 | vma->node.start, | |
298 | vma->node.size); | |
299 | if (ptr == NULL) | |
300 | return IO_ERR_PTR(-ENOMEM); | |
301 | ||
302 | vma->iomap = ptr; | |
303 | } | |
304 | ||
305 | __i915_vma_pin(vma); | |
306 | return ptr; | |
307 | } | |
308 | ||
309 | void i915_vma_unpin_and_release(struct i915_vma **p_vma) | |
310 | { | |
311 | struct i915_vma *vma; | |
312 | struct drm_i915_gem_object *obj; | |
313 | ||
314 | vma = fetch_and_zero(p_vma); | |
315 | if (!vma) | |
316 | return; | |
317 | ||
318 | obj = vma->obj; | |
319 | ||
320 | i915_vma_unpin(vma); | |
321 | i915_vma_close(vma); | |
322 | ||
323 | __i915_gem_object_release_unless_active(obj); | |
324 | } | |
325 | ||
782a3e9e CW |
326 | bool i915_vma_misplaced(const struct i915_vma *vma, |
327 | u64 size, u64 alignment, u64 flags) | |
b42fe9ca JL |
328 | { |
329 | if (!drm_mm_node_allocated(&vma->node)) | |
330 | return false; | |
331 | ||
332 | if (vma->node.size < size) | |
333 | return true; | |
334 | ||
f51455d4 CW |
335 | GEM_BUG_ON(alignment && !is_power_of_2(alignment)); |
336 | if (alignment && !IS_ALIGNED(vma->node.start, alignment)) | |
b42fe9ca JL |
337 | return true; |
338 | ||
339 | if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma)) | |
340 | return true; | |
341 | ||
342 | if (flags & PIN_OFFSET_BIAS && | |
343 | vma->node.start < (flags & PIN_OFFSET_MASK)) | |
344 | return true; | |
345 | ||
346 | if (flags & PIN_OFFSET_FIXED && | |
347 | vma->node.start != (flags & PIN_OFFSET_MASK)) | |
348 | return true; | |
349 | ||
350 | return false; | |
351 | } | |
352 | ||
353 | void __i915_vma_set_map_and_fenceable(struct i915_vma *vma) | |
354 | { | |
b42fe9ca | 355 | bool mappable, fenceable; |
b42fe9ca | 356 | |
944397f0 CW |
357 | GEM_BUG_ON(!i915_vma_is_ggtt(vma)); |
358 | GEM_BUG_ON(!vma->fence_size); | |
b42fe9ca JL |
359 | |
360 | /* | |
361 | * Explicitly disable for rotated VMA since the display does not | |
362 | * need the fence and the VMA is not accessible to other users. | |
363 | */ | |
944397f0 CW |
364 | if (vma->ggtt_view.type == I915_GGTT_VIEW_ROTATED) |
365 | return; | |
366 | ||
367 | fenceable = (vma->node.size >= vma->fence_size && | |
f51455d4 | 368 | IS_ALIGNED(vma->node.start, vma->fence_alignment)); |
944397f0 CW |
369 | |
370 | mappable = vma->node.start + vma->fence_size <= i915_vm_to_ggtt(vma->vm)->mappable_end; | |
371 | ||
372 | if (mappable && fenceable) | |
b42fe9ca JL |
373 | vma->flags |= I915_VMA_CAN_FENCE; |
374 | else | |
375 | vma->flags &= ~I915_VMA_CAN_FENCE; | |
376 | } | |
377 | ||
7d1d9aea | 378 | static bool color_differs(struct drm_mm_node *node, unsigned long color) |
b42fe9ca | 379 | { |
7d1d9aea CW |
380 | return node->allocated && node->color != color; |
381 | } | |
382 | ||
383 | bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level) | |
384 | { | |
385 | struct drm_mm_node *node = &vma->node; | |
b42fe9ca JL |
386 | struct drm_mm_node *other; |
387 | ||
388 | /* | |
389 | * On some machines we have to be careful when putting differing types | |
390 | * of snoopable memory together to avoid the prefetcher crossing memory | |
391 | * domains and dying. During vm initialisation, we decide whether or not | |
392 | * these constraints apply and set the drm_mm.color_adjust | |
393 | * appropriately. | |
394 | */ | |
395 | if (vma->vm->mm.color_adjust == NULL) | |
396 | return true; | |
397 | ||
7d1d9aea CW |
398 | /* Only valid to be called on an already inserted vma */ |
399 | GEM_BUG_ON(!drm_mm_node_allocated(node)); | |
400 | GEM_BUG_ON(list_empty(&node->node_list)); | |
b42fe9ca | 401 | |
7d1d9aea | 402 | other = list_prev_entry(node, node_list); |
ef426c10 | 403 | if (color_differs(other, cache_level) && !drm_mm_hole_follows(other)) |
b42fe9ca JL |
404 | return false; |
405 | ||
7d1d9aea | 406 | other = list_next_entry(node, node_list); |
ef426c10 | 407 | if (color_differs(other, cache_level) && !drm_mm_hole_follows(node)) |
b42fe9ca JL |
408 | return false; |
409 | ||
410 | return true; | |
411 | } | |
412 | ||
413 | /** | |
414 | * i915_vma_insert - finds a slot for the vma in its address space | |
415 | * @vma: the vma | |
416 | * @size: requested size in bytes (can be larger than the VMA) | |
417 | * @alignment: required alignment | |
418 | * @flags: mask of PIN_* flags to use | |
419 | * | |
420 | * First we try to allocate some free space that meets the requirements for | |
421 | * the VMA. Failiing that, if the flags permit, it will evict an old VMA, | |
422 | * preferrably the oldest idle entry to make room for the new VMA. | |
423 | * | |
424 | * Returns: | |
425 | * 0 on success, negative error code otherwise. | |
426 | */ | |
427 | static int | |
428 | i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) | |
429 | { | |
49d73912 | 430 | struct drm_i915_private *dev_priv = vma->vm->i915; |
b42fe9ca JL |
431 | struct drm_i915_gem_object *obj = vma->obj; |
432 | u64 start, end; | |
433 | int ret; | |
434 | ||
435 | GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)); | |
436 | GEM_BUG_ON(drm_mm_node_allocated(&vma->node)); | |
437 | ||
438 | size = max(size, vma->size); | |
944397f0 CW |
439 | alignment = max(alignment, vma->display_alignment); |
440 | if (flags & PIN_MAPPABLE) { | |
441 | size = max_t(typeof(size), size, vma->fence_size); | |
442 | alignment = max_t(typeof(alignment), | |
443 | alignment, vma->fence_alignment); | |
444 | } | |
b42fe9ca | 445 | |
f51455d4 CW |
446 | GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)); |
447 | GEM_BUG_ON(!IS_ALIGNED(alignment, I915_GTT_MIN_ALIGNMENT)); | |
448 | GEM_BUG_ON(!is_power_of_2(alignment)); | |
449 | ||
b42fe9ca | 450 | start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0; |
f51455d4 | 451 | GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE)); |
b42fe9ca JL |
452 | |
453 | end = vma->vm->total; | |
454 | if (flags & PIN_MAPPABLE) | |
455 | end = min_t(u64, end, dev_priv->ggtt.mappable_end); | |
456 | if (flags & PIN_ZONE_4G) | |
f51455d4 CW |
457 | end = min_t(u64, end, (1ULL << 32) - I915_GTT_PAGE_SIZE); |
458 | GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE)); | |
b42fe9ca JL |
459 | |
460 | /* If binding the object/GGTT view requires more space than the entire | |
461 | * aperture has, reject it early before evicting everything in a vain | |
462 | * attempt to find space. | |
463 | */ | |
464 | if (size > end) { | |
465 | DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu [object=%zd] > %s aperture=%llu\n", | |
466 | size, obj->base.size, | |
467 | flags & PIN_MAPPABLE ? "mappable" : "total", | |
468 | end); | |
2889caa9 | 469 | return -ENOSPC; |
b42fe9ca JL |
470 | } |
471 | ||
472 | ret = i915_gem_object_pin_pages(obj); | |
473 | if (ret) | |
474 | return ret; | |
475 | ||
fa3f46af MA |
476 | GEM_BUG_ON(vma->pages); |
477 | ||
478 | ret = vma->vm->set_pages(vma); | |
479 | if (ret) | |
480 | goto err_unpin; | |
481 | ||
b42fe9ca JL |
482 | if (flags & PIN_OFFSET_FIXED) { |
483 | u64 offset = flags & PIN_OFFSET_MASK; | |
f51455d4 | 484 | if (!IS_ALIGNED(offset, alignment) || |
e8f9ae9b | 485 | range_overflows(offset, size, end)) { |
b42fe9ca | 486 | ret = -EINVAL; |
fa3f46af | 487 | goto err_clear; |
b42fe9ca JL |
488 | } |
489 | ||
625d988a CW |
490 | ret = i915_gem_gtt_reserve(vma->vm, &vma->node, |
491 | size, offset, obj->cache_level, | |
492 | flags); | |
493 | if (ret) | |
fa3f46af | 494 | goto err_clear; |
b42fe9ca | 495 | } else { |
7464284b MA |
496 | /* |
497 | * We only support huge gtt pages through the 48b PPGTT, | |
498 | * however we also don't want to force any alignment for | |
499 | * objects which need to be tightly packed into the low 32bits. | |
500 | * | |
501 | * Note that we assume that GGTT are limited to 4GiB for the | |
502 | * forseeable future. See also i915_ggtt_offset(). | |
503 | */ | |
504 | if (upper_32_bits(end - 1) && | |
505 | vma->page_sizes.sg > I915_GTT_PAGE_SIZE) { | |
855822be MA |
506 | /* |
507 | * We can't mix 64K and 4K PTEs in the same page-table | |
508 | * (2M block), and so to avoid the ugliness and | |
509 | * complexity of coloring we opt for just aligning 64K | |
510 | * objects to 2M. | |
511 | */ | |
7464284b | 512 | u64 page_alignment = |
855822be MA |
513 | rounddown_pow_of_two(vma->page_sizes.sg | |
514 | I915_GTT_PAGE_SIZE_2M); | |
7464284b MA |
515 | |
516 | alignment = max(alignment, page_alignment); | |
855822be MA |
517 | |
518 | if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K) | |
519 | size = round_up(size, I915_GTT_PAGE_SIZE_2M); | |
7464284b MA |
520 | } |
521 | ||
e007b19d CW |
522 | ret = i915_gem_gtt_insert(vma->vm, &vma->node, |
523 | size, alignment, obj->cache_level, | |
524 | start, end, flags); | |
525 | if (ret) | |
fa3f46af | 526 | goto err_clear; |
b42fe9ca JL |
527 | |
528 | GEM_BUG_ON(vma->node.start < start); | |
529 | GEM_BUG_ON(vma->node.start + vma->node.size > end); | |
530 | } | |
44a0ec0d | 531 | GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
b42fe9ca JL |
532 | GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level)); |
533 | ||
534 | list_move_tail(&obj->global_link, &dev_priv->mm.bound_list); | |
535 | list_move_tail(&vma->vm_link, &vma->vm->inactive_list); | |
536 | obj->bind_count++; | |
537 | GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count); | |
538 | ||
539 | return 0; | |
540 | ||
fa3f46af MA |
541 | err_clear: |
542 | vma->vm->clear_pages(vma); | |
b42fe9ca JL |
543 | err_unpin: |
544 | i915_gem_object_unpin_pages(obj); | |
545 | return ret; | |
546 | } | |
547 | ||
31c7effa CW |
548 | static void |
549 | i915_vma_remove(struct i915_vma *vma) | |
550 | { | |
551 | struct drm_i915_gem_object *obj = vma->obj; | |
552 | ||
553 | GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); | |
554 | GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)); | |
555 | ||
fa3f46af MA |
556 | vma->vm->clear_pages(vma); |
557 | ||
31c7effa CW |
558 | drm_mm_remove_node(&vma->node); |
559 | list_move_tail(&vma->vm_link, &vma->vm->unbound_list); | |
560 | ||
561 | /* Since the unbound list is global, only move to that list if | |
562 | * no more VMAs exist. | |
563 | */ | |
564 | if (--obj->bind_count == 0) | |
565 | list_move_tail(&obj->global_link, | |
566 | &to_i915(obj->base.dev)->mm.unbound_list); | |
567 | ||
568 | /* And finally now the object is completely decoupled from this vma, | |
569 | * we can drop its hold on the backing storage and allow it to be | |
570 | * reaped by the shrinker. | |
571 | */ | |
572 | i915_gem_object_unpin_pages(obj); | |
573 | GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count); | |
574 | } | |
575 | ||
b42fe9ca JL |
576 | int __i915_vma_do_pin(struct i915_vma *vma, |
577 | u64 size, u64 alignment, u64 flags) | |
578 | { | |
31c7effa | 579 | const unsigned int bound = vma->flags; |
b42fe9ca JL |
580 | int ret; |
581 | ||
49d73912 | 582 | lockdep_assert_held(&vma->vm->i915->drm.struct_mutex); |
b42fe9ca JL |
583 | GEM_BUG_ON((flags & (PIN_GLOBAL | PIN_USER)) == 0); |
584 | GEM_BUG_ON((flags & PIN_GLOBAL) && !i915_vma_is_ggtt(vma)); | |
585 | ||
586 | if (WARN_ON(bound & I915_VMA_PIN_OVERFLOW)) { | |
587 | ret = -EBUSY; | |
31c7effa | 588 | goto err_unpin; |
b42fe9ca JL |
589 | } |
590 | ||
591 | if ((bound & I915_VMA_BIND_MASK) == 0) { | |
592 | ret = i915_vma_insert(vma, size, alignment, flags); | |
593 | if (ret) | |
31c7effa | 594 | goto err_unpin; |
b42fe9ca JL |
595 | } |
596 | ||
597 | ret = i915_vma_bind(vma, vma->obj->cache_level, flags); | |
598 | if (ret) | |
31c7effa | 599 | goto err_remove; |
b42fe9ca JL |
600 | |
601 | if ((bound ^ vma->flags) & I915_VMA_GLOBAL_BIND) | |
602 | __i915_vma_set_map_and_fenceable(vma); | |
603 | ||
0325701a | 604 | GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
b42fe9ca JL |
605 | GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags)); |
606 | return 0; | |
607 | ||
31c7effa CW |
608 | err_remove: |
609 | if ((bound & I915_VMA_BIND_MASK) == 0) { | |
31c7effa | 610 | i915_vma_remove(vma); |
fa3f46af | 611 | GEM_BUG_ON(vma->pages); |
31c7effa CW |
612 | } |
613 | err_unpin: | |
b42fe9ca JL |
614 | __i915_vma_unpin(vma); |
615 | return ret; | |
616 | } | |
617 | ||
b8e5d2ef | 618 | static void i915_vma_destroy(struct i915_vma *vma) |
b42fe9ca | 619 | { |
7a3bc034 CW |
620 | int i; |
621 | ||
b42fe9ca JL |
622 | GEM_BUG_ON(vma->node.allocated); |
623 | GEM_BUG_ON(i915_vma_is_active(vma)); | |
624 | GEM_BUG_ON(!i915_vma_is_closed(vma)); | |
625 | GEM_BUG_ON(vma->fence); | |
626 | ||
7a3bc034 CW |
627 | for (i = 0; i < ARRAY_SIZE(vma->last_read); i++) |
628 | GEM_BUG_ON(i915_gem_active_isset(&vma->last_read[i])); | |
629 | GEM_BUG_ON(i915_gem_active_isset(&vma->last_fence)); | |
630 | ||
b42fe9ca JL |
631 | list_del(&vma->vm_link); |
632 | if (!i915_vma_is_ggtt(vma)) | |
633 | i915_ppgtt_put(i915_vm_to_ppgtt(vma->vm)); | |
634 | ||
635 | kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma); | |
636 | } | |
637 | ||
638 | void i915_vma_close(struct i915_vma *vma) | |
639 | { | |
640 | GEM_BUG_ON(i915_vma_is_closed(vma)); | |
641 | vma->flags |= I915_VMA_CLOSED; | |
642 | ||
643 | list_del(&vma->obj_link); | |
644 | rb_erase(&vma->obj_node, &vma->obj->vma_tree); | |
645 | ||
646 | if (!i915_vma_is_active(vma) && !i915_vma_is_pinned(vma)) | |
647 | WARN_ON(i915_vma_unbind(vma)); | |
648 | } | |
649 | ||
650 | static void __i915_vma_iounmap(struct i915_vma *vma) | |
651 | { | |
652 | GEM_BUG_ON(i915_vma_is_pinned(vma)); | |
653 | ||
654 | if (vma->iomap == NULL) | |
655 | return; | |
656 | ||
657 | io_mapping_unmap(vma->iomap); | |
658 | vma->iomap = NULL; | |
659 | } | |
660 | ||
661 | int i915_vma_unbind(struct i915_vma *vma) | |
662 | { | |
663 | struct drm_i915_gem_object *obj = vma->obj; | |
664 | unsigned long active; | |
665 | int ret; | |
666 | ||
667 | lockdep_assert_held(&obj->base.dev->struct_mutex); | |
668 | ||
669 | /* First wait upon any activity as retiring the request may | |
670 | * have side-effects such as unpinning or even unbinding this vma. | |
671 | */ | |
672 | active = i915_vma_get_active(vma); | |
673 | if (active) { | |
674 | int idx; | |
675 | ||
676 | /* When a closed VMA is retired, it is unbound - eek. | |
677 | * In order to prevent it from being recursively closed, | |
678 | * take a pin on the vma so that the second unbind is | |
679 | * aborted. | |
680 | * | |
681 | * Even more scary is that the retire callback may free | |
682 | * the object (last active vma). To prevent the explosion | |
683 | * we defer the actual object free to a worker that can | |
684 | * only proceed once it acquires the struct_mutex (which | |
685 | * we currently hold, therefore it cannot free this object | |
686 | * before we are finished). | |
687 | */ | |
688 | __i915_vma_pin(vma); | |
689 | ||
690 | for_each_active(active, idx) { | |
691 | ret = i915_gem_active_retire(&vma->last_read[idx], | |
49d73912 | 692 | &vma->vm->i915->drm.struct_mutex); |
b42fe9ca JL |
693 | if (ret) |
694 | break; | |
695 | } | |
696 | ||
760a898d CW |
697 | if (!ret) { |
698 | ret = i915_gem_active_retire(&vma->last_fence, | |
699 | &vma->vm->i915->drm.struct_mutex); | |
700 | } | |
701 | ||
b42fe9ca JL |
702 | __i915_vma_unpin(vma); |
703 | if (ret) | |
704 | return ret; | |
b42fe9ca | 705 | } |
7a3bc034 | 706 | GEM_BUG_ON(i915_vma_is_active(vma)); |
b42fe9ca JL |
707 | |
708 | if (i915_vma_is_pinned(vma)) | |
709 | return -EBUSY; | |
710 | ||
711 | if (!drm_mm_node_allocated(&vma->node)) | |
712 | goto destroy; | |
713 | ||
714 | GEM_BUG_ON(obj->bind_count == 0); | |
715 | GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj)); | |
716 | ||
717 | if (i915_vma_is_map_and_fenceable(vma)) { | |
718 | /* release the fence reg _after_ flushing */ | |
719 | ret = i915_vma_put_fence(vma); | |
720 | if (ret) | |
721 | return ret; | |
722 | ||
723 | /* Force a pagefault for domain tracking on next user access */ | |
724 | i915_gem_release_mmap(obj); | |
725 | ||
726 | __i915_vma_iounmap(vma); | |
727 | vma->flags &= ~I915_VMA_CAN_FENCE; | |
728 | } | |
729 | ||
730 | if (likely(!vma->vm->closed)) { | |
731 | trace_i915_vma_unbind(vma); | |
732 | vma->vm->unbind_vma(vma); | |
733 | } | |
734 | vma->flags &= ~(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND); | |
735 | ||
31c7effa | 736 | i915_vma_remove(vma); |
b42fe9ca JL |
737 | |
738 | destroy: | |
739 | if (unlikely(i915_vma_is_closed(vma))) | |
740 | i915_vma_destroy(vma); | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
e3c7a1c5 CW |
745 | #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) |
746 | #include "selftests/i915_vma.c" | |
747 | #endif |