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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/dma-map-ops.h>
8#include <linux/vmalloc.h>
9#include <linux/spinlock.h>
10#include <linux/shmem_fs.h>
11#include <linux/dma-buf.h>
12#include <linux/pfn_t.h>
13
14#include <drm/drm_prime.h>
15
16#include "msm_drv.h"
17#include "msm_fence.h"
18#include "msm_gem.h"
19#include "msm_gpu.h"
20#include "msm_mmu.h"
21
22static dma_addr_t physaddr(struct drm_gem_object *obj)
23{
24 struct msm_gem_object *msm_obj = to_msm_bo(obj);
25 struct msm_drm_private *priv = obj->dev->dev_private;
26 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
27 priv->vram.paddr;
28}
29
30static bool use_pages(struct drm_gem_object *obj)
31{
32 struct msm_gem_object *msm_obj = to_msm_bo(obj);
33 return !msm_obj->vram_node;
34}
35
36/*
37 * Cache sync.. this is a bit over-complicated, to fit dma-mapping
38 * API. Really GPU cache is out of scope here (handled on cmdstream)
39 * and all we need to do is invalidate newly allocated pages before
40 * mapping to CPU as uncached/writecombine.
41 *
42 * On top of this, we have the added headache, that depending on
43 * display generation, the display's iommu may be wired up to either
44 * the toplevel drm device (mdss), or to the mdp sub-node, meaning
45 * that here we either have dma-direct or iommu ops.
46 *
47 * Let this be a cautionary tail of abstraction gone wrong.
48 */
49
50static void sync_for_device(struct msm_gem_object *msm_obj)
51{
52 struct device *dev = msm_obj->base.dev->dev;
53
54 dma_map_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0);
55}
56
57static void sync_for_cpu(struct msm_gem_object *msm_obj)
58{
59 struct device *dev = msm_obj->base.dev->dev;
60
61 dma_unmap_sgtable(dev, msm_obj->sgt, DMA_BIDIRECTIONAL, 0);
62}
63
64static void update_lru_active(struct drm_gem_object *obj)
65{
66 struct msm_drm_private *priv = obj->dev->dev_private;
67 struct msm_gem_object *msm_obj = to_msm_bo(obj);
68
69 GEM_WARN_ON(!msm_obj->pages);
70
71 if (msm_obj->pin_count) {
72 drm_gem_lru_move_tail_locked(&priv->lru.pinned, obj);
73 } else if (msm_obj->madv == MSM_MADV_WILLNEED) {
74 drm_gem_lru_move_tail_locked(&priv->lru.willneed, obj);
75 } else {
76 GEM_WARN_ON(msm_obj->madv != MSM_MADV_DONTNEED);
77
78 drm_gem_lru_move_tail_locked(&priv->lru.dontneed, obj);
79 }
80}
81
82static void update_lru_locked(struct drm_gem_object *obj)
83{
84 struct msm_drm_private *priv = obj->dev->dev_private;
85 struct msm_gem_object *msm_obj = to_msm_bo(obj);
86
87 msm_gem_assert_locked(&msm_obj->base);
88
89 if (!msm_obj->pages) {
90 GEM_WARN_ON(msm_obj->pin_count);
91
92 drm_gem_lru_move_tail_locked(&priv->lru.unbacked, obj);
93 } else {
94 update_lru_active(obj);
95 }
96}
97
98static void update_lru(struct drm_gem_object *obj)
99{
100 struct msm_drm_private *priv = obj->dev->dev_private;
101
102 mutex_lock(&priv->lru.lock);
103 update_lru_locked(obj);
104 mutex_unlock(&priv->lru.lock);
105}
106
107/* allocate pages from VRAM carveout, used when no IOMMU: */
108static struct page **get_pages_vram(struct drm_gem_object *obj, int npages)
109{
110 struct msm_gem_object *msm_obj = to_msm_bo(obj);
111 struct msm_drm_private *priv = obj->dev->dev_private;
112 dma_addr_t paddr;
113 struct page **p;
114 int ret, i;
115
116 p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
117 if (!p)
118 return ERR_PTR(-ENOMEM);
119
120 spin_lock(&priv->vram.lock);
121 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages);
122 spin_unlock(&priv->vram.lock);
123 if (ret) {
124 kvfree(p);
125 return ERR_PTR(ret);
126 }
127
128 paddr = physaddr(obj);
129 for (i = 0; i < npages; i++) {
130 p[i] = pfn_to_page(__phys_to_pfn(paddr));
131 paddr += PAGE_SIZE;
132 }
133
134 return p;
135}
136
137static struct page **get_pages(struct drm_gem_object *obj)
138{
139 struct msm_gem_object *msm_obj = to_msm_bo(obj);
140
141 msm_gem_assert_locked(obj);
142
143 if (!msm_obj->pages) {
144 struct drm_device *dev = obj->dev;
145 struct page **p;
146 int npages = obj->size >> PAGE_SHIFT;
147
148 if (use_pages(obj))
149 p = drm_gem_get_pages(obj);
150 else
151 p = get_pages_vram(obj, npages);
152
153 if (IS_ERR(p)) {
154 DRM_DEV_ERROR(dev->dev, "could not get pages: %ld\n",
155 PTR_ERR(p));
156 return p;
157 }
158
159 msm_obj->pages = p;
160
161 msm_obj->sgt = drm_prime_pages_to_sg(obj->dev, p, npages);
162 if (IS_ERR(msm_obj->sgt)) {
163 void *ptr = ERR_CAST(msm_obj->sgt);
164
165 DRM_DEV_ERROR(dev->dev, "failed to allocate sgt\n");
166 msm_obj->sgt = NULL;
167 return ptr;
168 }
169
170 /* For non-cached buffers, ensure the new pages are clean
171 * because display controller, GPU, etc. are not coherent:
172 */
173 if (msm_obj->flags & MSM_BO_WC)
174 sync_for_device(msm_obj);
175
176 update_lru(obj);
177 }
178
179 return msm_obj->pages;
180}
181
182static void put_pages_vram(struct drm_gem_object *obj)
183{
184 struct msm_gem_object *msm_obj = to_msm_bo(obj);
185 struct msm_drm_private *priv = obj->dev->dev_private;
186
187 spin_lock(&priv->vram.lock);
188 drm_mm_remove_node(msm_obj->vram_node);
189 spin_unlock(&priv->vram.lock);
190
191 kvfree(msm_obj->pages);
192}
193
194static void put_pages(struct drm_gem_object *obj)
195{
196 struct msm_gem_object *msm_obj = to_msm_bo(obj);
197
198 if (msm_obj->pages) {
199 if (msm_obj->sgt) {
200 /* For non-cached buffers, ensure the new
201 * pages are clean because display controller,
202 * GPU, etc. are not coherent:
203 */
204 if (msm_obj->flags & MSM_BO_WC)
205 sync_for_cpu(msm_obj);
206
207 sg_free_table(msm_obj->sgt);
208 kfree(msm_obj->sgt);
209 msm_obj->sgt = NULL;
210 }
211
212 if (use_pages(obj))
213 drm_gem_put_pages(obj, msm_obj->pages, true, false);
214 else
215 put_pages_vram(obj);
216
217 msm_obj->pages = NULL;
218 update_lru(obj);
219 }
220}
221
222static struct page **msm_gem_pin_pages_locked(struct drm_gem_object *obj,
223 unsigned madv)
224{
225 struct msm_gem_object *msm_obj = to_msm_bo(obj);
226
227 msm_gem_assert_locked(obj);
228
229 if (msm_obj->madv > madv) {
230 DRM_DEV_DEBUG_DRIVER(obj->dev->dev, "Invalid madv state: %u vs %u\n",
231 msm_obj->madv, madv);
232 return ERR_PTR(-EBUSY);
233 }
234
235 return get_pages(obj);
236}
237
238/*
239 * Update the pin count of the object, call under lru.lock
240 */
241void msm_gem_pin_obj_locked(struct drm_gem_object *obj)
242{
243 struct msm_drm_private *priv = obj->dev->dev_private;
244
245 msm_gem_assert_locked(obj);
246
247 to_msm_bo(obj)->pin_count++;
248 drm_gem_lru_move_tail_locked(&priv->lru.pinned, obj);
249}
250
251static void pin_obj_locked(struct drm_gem_object *obj)
252{
253 struct msm_drm_private *priv = obj->dev->dev_private;
254
255 mutex_lock(&priv->lru.lock);
256 msm_gem_pin_obj_locked(obj);
257 mutex_unlock(&priv->lru.lock);
258}
259
260struct page **msm_gem_pin_pages(struct drm_gem_object *obj)
261{
262 struct page **p;
263
264 msm_gem_lock(obj);
265 p = msm_gem_pin_pages_locked(obj, MSM_MADV_WILLNEED);
266 if (!IS_ERR(p))
267 pin_obj_locked(obj);
268 msm_gem_unlock(obj);
269
270 return p;
271}
272
273void msm_gem_unpin_pages(struct drm_gem_object *obj)
274{
275 msm_gem_lock(obj);
276 msm_gem_unpin_locked(obj);
277 msm_gem_unlock(obj);
278}
279
280static pgprot_t msm_gem_pgprot(struct msm_gem_object *msm_obj, pgprot_t prot)
281{
282 if (msm_obj->flags & MSM_BO_WC)
283 return pgprot_writecombine(prot);
284 return prot;
285}
286
287static vm_fault_t msm_gem_fault(struct vm_fault *vmf)
288{
289 struct vm_area_struct *vma = vmf->vma;
290 struct drm_gem_object *obj = vma->vm_private_data;
291 struct msm_gem_object *msm_obj = to_msm_bo(obj);
292 struct page **pages;
293 unsigned long pfn;
294 pgoff_t pgoff;
295 int err;
296 vm_fault_t ret;
297
298 /*
299 * vm_ops.open/drm_gem_mmap_obj and close get and put
300 * a reference on obj. So, we dont need to hold one here.
301 */
302 err = msm_gem_lock_interruptible(obj);
303 if (err) {
304 ret = VM_FAULT_NOPAGE;
305 goto out;
306 }
307
308 if (GEM_WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
309 msm_gem_unlock(obj);
310 return VM_FAULT_SIGBUS;
311 }
312
313 /* make sure we have pages attached now */
314 pages = get_pages(obj);
315 if (IS_ERR(pages)) {
316 ret = vmf_error(PTR_ERR(pages));
317 goto out_unlock;
318 }
319
320 /* We don't use vmf->pgoff since that has the fake offset: */
321 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
322
323 pfn = page_to_pfn(pages[pgoff]);
324
325 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
326 pfn, pfn << PAGE_SHIFT);
327
328 ret = vmf_insert_pfn(vma, vmf->address, pfn);
329
330out_unlock:
331 msm_gem_unlock(obj);
332out:
333 return ret;
334}
335
336/** get mmap offset */
337static uint64_t mmap_offset(struct drm_gem_object *obj)
338{
339 struct drm_device *dev = obj->dev;
340 int ret;
341
342 msm_gem_assert_locked(obj);
343
344 /* Make it mmapable */
345 ret = drm_gem_create_mmap_offset(obj);
346
347 if (ret) {
348 DRM_DEV_ERROR(dev->dev, "could not allocate mmap offset\n");
349 return 0;
350 }
351
352 return drm_vma_node_offset_addr(&obj->vma_node);
353}
354
355uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
356{
357 uint64_t offset;
358
359 msm_gem_lock(obj);
360 offset = mmap_offset(obj);
361 msm_gem_unlock(obj);
362 return offset;
363}
364
365static struct msm_gem_vma *add_vma(struct drm_gem_object *obj,
366 struct msm_gem_address_space *aspace)
367{
368 struct msm_gem_object *msm_obj = to_msm_bo(obj);
369 struct msm_gem_vma *vma;
370
371 msm_gem_assert_locked(obj);
372
373 vma = msm_gem_vma_new(aspace);
374 if (!vma)
375 return ERR_PTR(-ENOMEM);
376
377 list_add_tail(&vma->list, &msm_obj->vmas);
378
379 return vma;
380}
381
382static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj,
383 struct msm_gem_address_space *aspace)
384{
385 struct msm_gem_object *msm_obj = to_msm_bo(obj);
386 struct msm_gem_vma *vma;
387
388 msm_gem_assert_locked(obj);
389
390 list_for_each_entry(vma, &msm_obj->vmas, list) {
391 if (vma->aspace == aspace)
392 return vma;
393 }
394
395 return NULL;
396}
397
398static void del_vma(struct msm_gem_vma *vma)
399{
400 if (!vma)
401 return;
402
403 list_del(&vma->list);
404 kfree(vma);
405}
406
407/*
408 * If close is true, this also closes the VMA (releasing the allocated
409 * iova range) in addition to removing the iommu mapping. In the eviction
410 * case (!close), we keep the iova allocated, but only remove the iommu
411 * mapping.
412 */
413static void
414put_iova_spaces(struct drm_gem_object *obj, bool close)
415{
416 struct msm_gem_object *msm_obj = to_msm_bo(obj);
417 struct msm_gem_vma *vma;
418
419 msm_gem_assert_locked(obj);
420
421 list_for_each_entry(vma, &msm_obj->vmas, list) {
422 if (vma->aspace) {
423 msm_gem_vma_purge(vma);
424 if (close)
425 msm_gem_vma_close(vma);
426 }
427 }
428}
429
430/* Called with msm_obj locked */
431static void
432put_iova_vmas(struct drm_gem_object *obj)
433{
434 struct msm_gem_object *msm_obj = to_msm_bo(obj);
435 struct msm_gem_vma *vma, *tmp;
436
437 msm_gem_assert_locked(obj);
438
439 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) {
440 del_vma(vma);
441 }
442}
443
444static struct msm_gem_vma *get_vma_locked(struct drm_gem_object *obj,
445 struct msm_gem_address_space *aspace,
446 u64 range_start, u64 range_end)
447{
448 struct msm_gem_vma *vma;
449
450 msm_gem_assert_locked(obj);
451
452 vma = lookup_vma(obj, aspace);
453
454 if (!vma) {
455 int ret;
456
457 vma = add_vma(obj, aspace);
458 if (IS_ERR(vma))
459 return vma;
460
461 ret = msm_gem_vma_init(vma, obj->size,
462 range_start, range_end);
463 if (ret) {
464 del_vma(vma);
465 return ERR_PTR(ret);
466 }
467 } else {
468 GEM_WARN_ON(vma->iova < range_start);
469 GEM_WARN_ON((vma->iova + obj->size) > range_end);
470 }
471
472 return vma;
473}
474
475int msm_gem_pin_vma_locked(struct drm_gem_object *obj, struct msm_gem_vma *vma)
476{
477 struct msm_gem_object *msm_obj = to_msm_bo(obj);
478 struct page **pages;
479 int prot = IOMMU_READ;
480
481 if (!(msm_obj->flags & MSM_BO_GPU_READONLY))
482 prot |= IOMMU_WRITE;
483
484 if (msm_obj->flags & MSM_BO_MAP_PRIV)
485 prot |= IOMMU_PRIV;
486
487 if (msm_obj->flags & MSM_BO_CACHED_COHERENT)
488 prot |= IOMMU_CACHE;
489
490 msm_gem_assert_locked(obj);
491
492 pages = msm_gem_pin_pages_locked(obj, MSM_MADV_WILLNEED);
493 if (IS_ERR(pages))
494 return PTR_ERR(pages);
495
496 return msm_gem_vma_map(vma, prot, msm_obj->sgt, obj->size);
497}
498
499void msm_gem_unpin_locked(struct drm_gem_object *obj)
500{
501 struct msm_drm_private *priv = obj->dev->dev_private;
502 struct msm_gem_object *msm_obj = to_msm_bo(obj);
503
504 msm_gem_assert_locked(obj);
505
506 mutex_lock(&priv->lru.lock);
507 msm_obj->pin_count--;
508 GEM_WARN_ON(msm_obj->pin_count < 0);
509 update_lru_locked(obj);
510 mutex_unlock(&priv->lru.lock);
511}
512
513/* Special unpin path for use in fence-signaling path, avoiding the need
514 * to hold the obj lock by only depending on things that a protected by
515 * the LRU lock. In particular we know that that we already have backing
516 * and and that the object's dma_resv has the fence for the current
517 * submit/job which will prevent us racing against page eviction.
518 */
519void msm_gem_unpin_active(struct drm_gem_object *obj)
520{
521 struct msm_gem_object *msm_obj = to_msm_bo(obj);
522
523 msm_obj->pin_count--;
524 GEM_WARN_ON(msm_obj->pin_count < 0);
525 update_lru_active(obj);
526}
527
528struct msm_gem_vma *msm_gem_get_vma_locked(struct drm_gem_object *obj,
529 struct msm_gem_address_space *aspace)
530{
531 return get_vma_locked(obj, aspace, 0, U64_MAX);
532}
533
534static int get_and_pin_iova_range_locked(struct drm_gem_object *obj,
535 struct msm_gem_address_space *aspace, uint64_t *iova,
536 u64 range_start, u64 range_end)
537{
538 struct msm_gem_vma *vma;
539 int ret;
540
541 msm_gem_assert_locked(obj);
542
543 vma = get_vma_locked(obj, aspace, range_start, range_end);
544 if (IS_ERR(vma))
545 return PTR_ERR(vma);
546
547 ret = msm_gem_pin_vma_locked(obj, vma);
548 if (!ret) {
549 *iova = vma->iova;
550 pin_obj_locked(obj);
551 }
552
553 return ret;
554}
555
556/*
557 * get iova and pin it. Should have a matching put
558 * limits iova to specified range (in pages)
559 */
560int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj,
561 struct msm_gem_address_space *aspace, uint64_t *iova,
562 u64 range_start, u64 range_end)
563{
564 int ret;
565
566 msm_gem_lock(obj);
567 ret = get_and_pin_iova_range_locked(obj, aspace, iova, range_start, range_end);
568 msm_gem_unlock(obj);
569
570 return ret;
571}
572
573/* get iova and pin it. Should have a matching put */
574int msm_gem_get_and_pin_iova(struct drm_gem_object *obj,
575 struct msm_gem_address_space *aspace, uint64_t *iova)
576{
577 return msm_gem_get_and_pin_iova_range(obj, aspace, iova, 0, U64_MAX);
578}
579
580/*
581 * Get an iova but don't pin it. Doesn't need a put because iovas are currently
582 * valid for the life of the object
583 */
584int msm_gem_get_iova(struct drm_gem_object *obj,
585 struct msm_gem_address_space *aspace, uint64_t *iova)
586{
587 struct msm_gem_vma *vma;
588 int ret = 0;
589
590 msm_gem_lock(obj);
591 vma = get_vma_locked(obj, aspace, 0, U64_MAX);
592 if (IS_ERR(vma)) {
593 ret = PTR_ERR(vma);
594 } else {
595 *iova = vma->iova;
596 }
597 msm_gem_unlock(obj);
598
599 return ret;
600}
601
602static int clear_iova(struct drm_gem_object *obj,
603 struct msm_gem_address_space *aspace)
604{
605 struct msm_gem_vma *vma = lookup_vma(obj, aspace);
606
607 if (!vma)
608 return 0;
609
610 msm_gem_vma_purge(vma);
611 msm_gem_vma_close(vma);
612 del_vma(vma);
613
614 return 0;
615}
616
617/*
618 * Get the requested iova but don't pin it. Fails if the requested iova is
619 * not available. Doesn't need a put because iovas are currently valid for
620 * the life of the object.
621 *
622 * Setting an iova of zero will clear the vma.
623 */
624int msm_gem_set_iova(struct drm_gem_object *obj,
625 struct msm_gem_address_space *aspace, uint64_t iova)
626{
627 int ret = 0;
628
629 msm_gem_lock(obj);
630 if (!iova) {
631 ret = clear_iova(obj, aspace);
632 } else {
633 struct msm_gem_vma *vma;
634 vma = get_vma_locked(obj, aspace, iova, iova + obj->size);
635 if (IS_ERR(vma)) {
636 ret = PTR_ERR(vma);
637 } else if (GEM_WARN_ON(vma->iova != iova)) {
638 clear_iova(obj, aspace);
639 ret = -EBUSY;
640 }
641 }
642 msm_gem_unlock(obj);
643
644 return ret;
645}
646
647/*
648 * Unpin a iova by updating the reference counts. The memory isn't actually
649 * purged until something else (shrinker, mm_notifier, destroy, etc) decides
650 * to get rid of it
651 */
652void msm_gem_unpin_iova(struct drm_gem_object *obj,
653 struct msm_gem_address_space *aspace)
654{
655 struct msm_gem_vma *vma;
656
657 msm_gem_lock(obj);
658 vma = lookup_vma(obj, aspace);
659 if (!GEM_WARN_ON(!vma)) {
660 msm_gem_unpin_locked(obj);
661 }
662 msm_gem_unlock(obj);
663}
664
665int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
666 struct drm_mode_create_dumb *args)
667{
668 args->pitch = align_pitch(args->width, args->bpp);
669 args->size = PAGE_ALIGN(args->pitch * args->height);
670 return msm_gem_new_handle(dev, file, args->size,
671 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle, "dumb");
672}
673
674int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
675 uint32_t handle, uint64_t *offset)
676{
677 struct drm_gem_object *obj;
678 int ret = 0;
679
680 /* GEM does all our handle to object mapping */
681 obj = drm_gem_object_lookup(file, handle);
682 if (obj == NULL) {
683 ret = -ENOENT;
684 goto fail;
685 }
686
687 *offset = msm_gem_mmap_offset(obj);
688
689 drm_gem_object_put(obj);
690
691fail:
692 return ret;
693}
694
695static void *get_vaddr(struct drm_gem_object *obj, unsigned madv)
696{
697 struct msm_gem_object *msm_obj = to_msm_bo(obj);
698 struct page **pages;
699 int ret = 0;
700
701 msm_gem_assert_locked(obj);
702
703 if (obj->import_attach)
704 return ERR_PTR(-ENODEV);
705
706 pages = msm_gem_pin_pages_locked(obj, madv);
707 if (IS_ERR(pages))
708 return ERR_CAST(pages);
709
710 pin_obj_locked(obj);
711
712 /* increment vmap_count *before* vmap() call, so shrinker can
713 * check vmap_count (is_vunmapable()) outside of msm_obj lock.
714 * This guarantees that we won't try to msm_gem_vunmap() this
715 * same object from within the vmap() call (while we already
716 * hold msm_obj lock)
717 */
718 msm_obj->vmap_count++;
719
720 if (!msm_obj->vaddr) {
721 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
722 VM_MAP, msm_gem_pgprot(msm_obj, PAGE_KERNEL));
723 if (msm_obj->vaddr == NULL) {
724 ret = -ENOMEM;
725 goto fail;
726 }
727 }
728
729 return msm_obj->vaddr;
730
731fail:
732 msm_obj->vmap_count--;
733 msm_gem_unpin_locked(obj);
734 return ERR_PTR(ret);
735}
736
737void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj)
738{
739 return get_vaddr(obj, MSM_MADV_WILLNEED);
740}
741
742void *msm_gem_get_vaddr(struct drm_gem_object *obj)
743{
744 void *ret;
745
746 msm_gem_lock(obj);
747 ret = msm_gem_get_vaddr_locked(obj);
748 msm_gem_unlock(obj);
749
750 return ret;
751}
752
753/*
754 * Don't use this! It is for the very special case of dumping
755 * submits from GPU hangs or faults, were the bo may already
756 * be MSM_MADV_DONTNEED, but we know the buffer is still on the
757 * active list.
758 */
759void *msm_gem_get_vaddr_active(struct drm_gem_object *obj)
760{
761 return get_vaddr(obj, __MSM_MADV_PURGED);
762}
763
764void msm_gem_put_vaddr_locked(struct drm_gem_object *obj)
765{
766 struct msm_gem_object *msm_obj = to_msm_bo(obj);
767
768 msm_gem_assert_locked(obj);
769 GEM_WARN_ON(msm_obj->vmap_count < 1);
770
771 msm_obj->vmap_count--;
772 msm_gem_unpin_locked(obj);
773}
774
775void msm_gem_put_vaddr(struct drm_gem_object *obj)
776{
777 msm_gem_lock(obj);
778 msm_gem_put_vaddr_locked(obj);
779 msm_gem_unlock(obj);
780}
781
782/* Update madvise status, returns true if not purged, else
783 * false or -errno.
784 */
785int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv)
786{
787 struct msm_drm_private *priv = obj->dev->dev_private;
788 struct msm_gem_object *msm_obj = to_msm_bo(obj);
789
790 msm_gem_lock(obj);
791
792 mutex_lock(&priv->lru.lock);
793
794 if (msm_obj->madv != __MSM_MADV_PURGED)
795 msm_obj->madv = madv;
796
797 madv = msm_obj->madv;
798
799 /* If the obj is inactive, we might need to move it
800 * between inactive lists
801 */
802 update_lru_locked(obj);
803
804 mutex_unlock(&priv->lru.lock);
805
806 msm_gem_unlock(obj);
807
808 return (madv != __MSM_MADV_PURGED);
809}
810
811void msm_gem_purge(struct drm_gem_object *obj)
812{
813 struct drm_device *dev = obj->dev;
814 struct msm_drm_private *priv = obj->dev->dev_private;
815 struct msm_gem_object *msm_obj = to_msm_bo(obj);
816
817 msm_gem_assert_locked(obj);
818 GEM_WARN_ON(!is_purgeable(msm_obj));
819
820 /* Get rid of any iommu mapping(s): */
821 put_iova_spaces(obj, true);
822
823 msm_gem_vunmap(obj);
824
825 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
826
827 put_pages(obj);
828
829 put_iova_vmas(obj);
830
831 mutex_lock(&priv->lru.lock);
832 /* A one-way transition: */
833 msm_obj->madv = __MSM_MADV_PURGED;
834 mutex_unlock(&priv->lru.lock);
835
836 drm_gem_free_mmap_offset(obj);
837
838 /* Our goal here is to return as much of the memory as
839 * is possible back to the system as we are called from OOM.
840 * To do this we must instruct the shmfs to drop all of its
841 * backing pages, *now*.
842 */
843 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1);
844
845 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping,
846 0, (loff_t)-1);
847}
848
849/*
850 * Unpin the backing pages and make them available to be swapped out.
851 */
852void msm_gem_evict(struct drm_gem_object *obj)
853{
854 struct drm_device *dev = obj->dev;
855 struct msm_gem_object *msm_obj = to_msm_bo(obj);
856
857 msm_gem_assert_locked(obj);
858 GEM_WARN_ON(is_unevictable(msm_obj));
859
860 /* Get rid of any iommu mapping(s): */
861 put_iova_spaces(obj, false);
862
863 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
864
865 put_pages(obj);
866}
867
868void msm_gem_vunmap(struct drm_gem_object *obj)
869{
870 struct msm_gem_object *msm_obj = to_msm_bo(obj);
871
872 msm_gem_assert_locked(obj);
873
874 if (!msm_obj->vaddr || GEM_WARN_ON(!is_vunmapable(msm_obj)))
875 return;
876
877 vunmap(msm_obj->vaddr);
878 msm_obj->vaddr = NULL;
879}
880
881bool msm_gem_active(struct drm_gem_object *obj)
882{
883 msm_gem_assert_locked(obj);
884
885 if (to_msm_bo(obj)->pin_count)
886 return true;
887
888 return !dma_resv_test_signaled(obj->resv, dma_resv_usage_rw(true));
889}
890
891int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
892{
893 bool write = !!(op & MSM_PREP_WRITE);
894 unsigned long remain =
895 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout);
896 long ret;
897
898 if (op & MSM_PREP_BOOST) {
899 dma_resv_set_deadline(obj->resv, dma_resv_usage_rw(write),
900 ktime_get());
901 }
902
903 ret = dma_resv_wait_timeout(obj->resv, dma_resv_usage_rw(write),
904 true, remain);
905 if (ret == 0)
906 return remain == 0 ? -EBUSY : -ETIMEDOUT;
907 else if (ret < 0)
908 return ret;
909
910 /* TODO cache maintenance */
911
912 return 0;
913}
914
915int msm_gem_cpu_fini(struct drm_gem_object *obj)
916{
917 /* TODO cache maintenance */
918 return 0;
919}
920
921#ifdef CONFIG_DEBUG_FS
922void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m,
923 struct msm_gem_stats *stats)
924{
925 struct msm_gem_object *msm_obj = to_msm_bo(obj);
926 struct dma_resv *robj = obj->resv;
927 struct msm_gem_vma *vma;
928 uint64_t off = drm_vma_node_start(&obj->vma_node);
929 const char *madv;
930
931 msm_gem_lock(obj);
932
933 stats->all.count++;
934 stats->all.size += obj->size;
935
936 if (msm_gem_active(obj)) {
937 stats->active.count++;
938 stats->active.size += obj->size;
939 }
940
941 if (msm_obj->pages) {
942 stats->resident.count++;
943 stats->resident.size += obj->size;
944 }
945
946 switch (msm_obj->madv) {
947 case __MSM_MADV_PURGED:
948 stats->purged.count++;
949 stats->purged.size += obj->size;
950 madv = " purged";
951 break;
952 case MSM_MADV_DONTNEED:
953 stats->purgeable.count++;
954 stats->purgeable.size += obj->size;
955 madv = " purgeable";
956 break;
957 case MSM_MADV_WILLNEED:
958 default:
959 madv = "";
960 break;
961 }
962
963 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p",
964 msm_obj->flags, msm_gem_active(obj) ? 'A' : 'I',
965 obj->name, kref_read(&obj->refcount),
966 off, msm_obj->vaddr);
967
968 seq_printf(m, " %08zu %9s %-32s\n", obj->size, madv, msm_obj->name);
969
970 if (!list_empty(&msm_obj->vmas)) {
971
972 seq_puts(m, " vmas:");
973
974 list_for_each_entry(vma, &msm_obj->vmas, list) {
975 const char *name, *comm;
976 if (vma->aspace) {
977 struct msm_gem_address_space *aspace = vma->aspace;
978 struct task_struct *task =
979 get_pid_task(aspace->pid, PIDTYPE_PID);
980 if (task) {
981 comm = kstrdup(task->comm, GFP_KERNEL);
982 put_task_struct(task);
983 } else {
984 comm = NULL;
985 }
986 name = aspace->name;
987 } else {
988 name = comm = NULL;
989 }
990 seq_printf(m, " [%s%s%s: aspace=%p, %08llx,%s]",
991 name, comm ? ":" : "", comm ? comm : "",
992 vma->aspace, vma->iova,
993 vma->mapped ? "mapped" : "unmapped");
994 kfree(comm);
995 }
996
997 seq_puts(m, "\n");
998 }
999
1000 dma_resv_describe(robj, m);
1001 msm_gem_unlock(obj);
1002}
1003
1004void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
1005{
1006 struct msm_gem_stats stats = {};
1007 struct msm_gem_object *msm_obj;
1008
1009 seq_puts(m, " flags id ref offset kaddr size madv name\n");
1010 list_for_each_entry(msm_obj, list, node) {
1011 struct drm_gem_object *obj = &msm_obj->base;
1012 seq_puts(m, " ");
1013 msm_gem_describe(obj, m, &stats);
1014 }
1015
1016 seq_printf(m, "Total: %4d objects, %9zu bytes\n",
1017 stats.all.count, stats.all.size);
1018 seq_printf(m, "Active: %4d objects, %9zu bytes\n",
1019 stats.active.count, stats.active.size);
1020 seq_printf(m, "Resident: %4d objects, %9zu bytes\n",
1021 stats.resident.count, stats.resident.size);
1022 seq_printf(m, "Purgeable: %4d objects, %9zu bytes\n",
1023 stats.purgeable.count, stats.purgeable.size);
1024 seq_printf(m, "Purged: %4d objects, %9zu bytes\n",
1025 stats.purged.count, stats.purged.size);
1026}
1027#endif
1028
1029/* don't call directly! Use drm_gem_object_put() */
1030static void msm_gem_free_object(struct drm_gem_object *obj)
1031{
1032 struct msm_gem_object *msm_obj = to_msm_bo(obj);
1033 struct drm_device *dev = obj->dev;
1034 struct msm_drm_private *priv = dev->dev_private;
1035
1036 mutex_lock(&priv->obj_lock);
1037 list_del(&msm_obj->node);
1038 mutex_unlock(&priv->obj_lock);
1039
1040 put_iova_spaces(obj, true);
1041
1042 if (obj->import_attach) {
1043 GEM_WARN_ON(msm_obj->vaddr);
1044
1045 /* Don't drop the pages for imported dmabuf, as they are not
1046 * ours, just free the array we allocated:
1047 */
1048 kvfree(msm_obj->pages);
1049
1050 put_iova_vmas(obj);
1051
1052 drm_prime_gem_destroy(obj, msm_obj->sgt);
1053 } else {
1054 msm_gem_vunmap(obj);
1055 put_pages(obj);
1056 put_iova_vmas(obj);
1057 }
1058
1059 drm_gem_object_release(obj);
1060
1061 kfree(msm_obj->metadata);
1062 kfree(msm_obj);
1063}
1064
1065static int msm_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
1066{
1067 struct msm_gem_object *msm_obj = to_msm_bo(obj);
1068
1069 vm_flags_set(vma, VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP);
1070 vma->vm_page_prot = msm_gem_pgprot(msm_obj, vm_get_page_prot(vma->vm_flags));
1071
1072 return 0;
1073}
1074
1075/* convenience method to construct a GEM buffer object, and userspace handle */
1076int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
1077 uint32_t size, uint32_t flags, uint32_t *handle,
1078 char *name)
1079{
1080 struct drm_gem_object *obj;
1081 int ret;
1082
1083 obj = msm_gem_new(dev, size, flags);
1084
1085 if (IS_ERR(obj))
1086 return PTR_ERR(obj);
1087
1088 if (name)
1089 msm_gem_object_set_name(obj, "%s", name);
1090
1091 ret = drm_gem_handle_create(file, obj, handle);
1092
1093 /* drop reference from allocate - handle holds it now */
1094 drm_gem_object_put(obj);
1095
1096 return ret;
1097}
1098
1099static enum drm_gem_object_status msm_gem_status(struct drm_gem_object *obj)
1100{
1101 struct msm_gem_object *msm_obj = to_msm_bo(obj);
1102 enum drm_gem_object_status status = 0;
1103
1104 if (msm_obj->pages)
1105 status |= DRM_GEM_OBJECT_RESIDENT;
1106
1107 if (msm_obj->madv == MSM_MADV_DONTNEED)
1108 status |= DRM_GEM_OBJECT_PURGEABLE;
1109
1110 return status;
1111}
1112
1113static const struct vm_operations_struct vm_ops = {
1114 .fault = msm_gem_fault,
1115 .open = drm_gem_vm_open,
1116 .close = drm_gem_vm_close,
1117};
1118
1119static const struct drm_gem_object_funcs msm_gem_object_funcs = {
1120 .free = msm_gem_free_object,
1121 .pin = msm_gem_prime_pin,
1122 .unpin = msm_gem_prime_unpin,
1123 .get_sg_table = msm_gem_prime_get_sg_table,
1124 .vmap = msm_gem_prime_vmap,
1125 .vunmap = msm_gem_prime_vunmap,
1126 .mmap = msm_gem_object_mmap,
1127 .status = msm_gem_status,
1128 .vm_ops = &vm_ops,
1129};
1130
1131static int msm_gem_new_impl(struct drm_device *dev,
1132 uint32_t size, uint32_t flags,
1133 struct drm_gem_object **obj)
1134{
1135 struct msm_drm_private *priv = dev->dev_private;
1136 struct msm_gem_object *msm_obj;
1137
1138 switch (flags & MSM_BO_CACHE_MASK) {
1139 case MSM_BO_CACHED:
1140 case MSM_BO_WC:
1141 break;
1142 case MSM_BO_CACHED_COHERENT:
1143 if (priv->has_cached_coherent)
1144 break;
1145 fallthrough;
1146 default:
1147 DRM_DEV_DEBUG(dev->dev, "invalid cache flag: %x\n",
1148 (flags & MSM_BO_CACHE_MASK));
1149 return -EINVAL;
1150 }
1151
1152 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL);
1153 if (!msm_obj)
1154 return -ENOMEM;
1155
1156 msm_obj->flags = flags;
1157 msm_obj->madv = MSM_MADV_WILLNEED;
1158
1159 INIT_LIST_HEAD(&msm_obj->node);
1160 INIT_LIST_HEAD(&msm_obj->vmas);
1161
1162 *obj = &msm_obj->base;
1163 (*obj)->funcs = &msm_gem_object_funcs;
1164
1165 return 0;
1166}
1167
1168struct drm_gem_object *msm_gem_new(struct drm_device *dev, uint32_t size, uint32_t flags)
1169{
1170 struct msm_drm_private *priv = dev->dev_private;
1171 struct msm_gem_object *msm_obj;
1172 struct drm_gem_object *obj = NULL;
1173 bool use_vram = false;
1174 int ret;
1175
1176 size = PAGE_ALIGN(size);
1177
1178 if (!msm_use_mmu(dev))
1179 use_vram = true;
1180 else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size)
1181 use_vram = true;
1182
1183 if (GEM_WARN_ON(use_vram && !priv->vram.size))
1184 return ERR_PTR(-EINVAL);
1185
1186 /* Disallow zero sized objects as they make the underlying
1187 * infrastructure grumpy
1188 */
1189 if (size == 0)
1190 return ERR_PTR(-EINVAL);
1191
1192 ret = msm_gem_new_impl(dev, size, flags, &obj);
1193 if (ret)
1194 return ERR_PTR(ret);
1195
1196 msm_obj = to_msm_bo(obj);
1197
1198 if (use_vram) {
1199 struct msm_gem_vma *vma;
1200 struct page **pages;
1201
1202 drm_gem_private_object_init(dev, obj, size);
1203
1204 msm_gem_lock(obj);
1205
1206 vma = add_vma(obj, NULL);
1207 msm_gem_unlock(obj);
1208 if (IS_ERR(vma)) {
1209 ret = PTR_ERR(vma);
1210 goto fail;
1211 }
1212
1213 to_msm_bo(obj)->vram_node = &vma->node;
1214
1215 msm_gem_lock(obj);
1216 pages = get_pages(obj);
1217 msm_gem_unlock(obj);
1218 if (IS_ERR(pages)) {
1219 ret = PTR_ERR(pages);
1220 goto fail;
1221 }
1222
1223 vma->iova = physaddr(obj);
1224 } else {
1225 ret = drm_gem_object_init(dev, obj, size);
1226 if (ret)
1227 goto fail;
1228 /*
1229 * Our buffers are kept pinned, so allocating them from the
1230 * MOVABLE zone is a really bad idea, and conflicts with CMA.
1231 * See comments above new_inode() why this is required _and_
1232 * expected if you're going to pin these pages.
1233 */
1234 mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER);
1235 }
1236
1237 drm_gem_lru_move_tail(&priv->lru.unbacked, obj);
1238
1239 mutex_lock(&priv->obj_lock);
1240 list_add_tail(&msm_obj->node, &priv->objects);
1241 mutex_unlock(&priv->obj_lock);
1242
1243 ret = drm_gem_create_mmap_offset(obj);
1244 if (ret)
1245 goto fail;
1246
1247 return obj;
1248
1249fail:
1250 drm_gem_object_put(obj);
1251 return ERR_PTR(ret);
1252}
1253
1254struct drm_gem_object *msm_gem_import(struct drm_device *dev,
1255 struct dma_buf *dmabuf, struct sg_table *sgt)
1256{
1257 struct msm_drm_private *priv = dev->dev_private;
1258 struct msm_gem_object *msm_obj;
1259 struct drm_gem_object *obj;
1260 uint32_t size;
1261 int ret, npages;
1262
1263 /* if we don't have IOMMU, don't bother pretending we can import: */
1264 if (!msm_use_mmu(dev)) {
1265 DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n");
1266 return ERR_PTR(-EINVAL);
1267 }
1268
1269 size = PAGE_ALIGN(dmabuf->size);
1270
1271 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj);
1272 if (ret)
1273 return ERR_PTR(ret);
1274
1275 drm_gem_private_object_init(dev, obj, size);
1276
1277 npages = size / PAGE_SIZE;
1278
1279 msm_obj = to_msm_bo(obj);
1280 msm_gem_lock(obj);
1281 msm_obj->sgt = sgt;
1282 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1283 if (!msm_obj->pages) {
1284 msm_gem_unlock(obj);
1285 ret = -ENOMEM;
1286 goto fail;
1287 }
1288
1289 ret = drm_prime_sg_to_page_array(sgt, msm_obj->pages, npages);
1290 if (ret) {
1291 msm_gem_unlock(obj);
1292 goto fail;
1293 }
1294
1295 msm_gem_unlock(obj);
1296
1297 drm_gem_lru_move_tail(&priv->lru.pinned, obj);
1298
1299 mutex_lock(&priv->obj_lock);
1300 list_add_tail(&msm_obj->node, &priv->objects);
1301 mutex_unlock(&priv->obj_lock);
1302
1303 ret = drm_gem_create_mmap_offset(obj);
1304 if (ret)
1305 goto fail;
1306
1307 return obj;
1308
1309fail:
1310 drm_gem_object_put(obj);
1311 return ERR_PTR(ret);
1312}
1313
1314void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
1315 uint32_t flags, struct msm_gem_address_space *aspace,
1316 struct drm_gem_object **bo, uint64_t *iova)
1317{
1318 void *vaddr;
1319 struct drm_gem_object *obj = msm_gem_new(dev, size, flags);
1320 int ret;
1321
1322 if (IS_ERR(obj))
1323 return ERR_CAST(obj);
1324
1325 if (iova) {
1326 ret = msm_gem_get_and_pin_iova(obj, aspace, iova);
1327 if (ret)
1328 goto err;
1329 }
1330
1331 vaddr = msm_gem_get_vaddr(obj);
1332 if (IS_ERR(vaddr)) {
1333 msm_gem_unpin_iova(obj, aspace);
1334 ret = PTR_ERR(vaddr);
1335 goto err;
1336 }
1337
1338 if (bo)
1339 *bo = obj;
1340
1341 return vaddr;
1342err:
1343 drm_gem_object_put(obj);
1344
1345 return ERR_PTR(ret);
1346
1347}
1348
1349void msm_gem_kernel_put(struct drm_gem_object *bo,
1350 struct msm_gem_address_space *aspace)
1351{
1352 if (IS_ERR_OR_NULL(bo))
1353 return;
1354
1355 msm_gem_put_vaddr(bo);
1356 msm_gem_unpin_iova(bo, aspace);
1357 drm_gem_object_put(bo);
1358}
1359
1360void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...)
1361{
1362 struct msm_gem_object *msm_obj = to_msm_bo(bo);
1363 va_list ap;
1364
1365 if (!fmt)
1366 return;
1367
1368 va_start(ap, fmt);
1369 vsnprintf(msm_obj->name, sizeof(msm_obj->name), fmt, ap);
1370 va_end(ap);
1371}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/spinlock.h>
8#include <linux/shmem_fs.h>
9#include <linux/dma-buf.h>
10#include <linux/pfn_t.h>
11
12#include <drm/drm_prime.h>
13
14#include "msm_drv.h"
15#include "msm_fence.h"
16#include "msm_gem.h"
17#include "msm_gpu.h"
18#include "msm_mmu.h"
19
20static void msm_gem_vunmap_locked(struct drm_gem_object *obj);
21
22
23static dma_addr_t physaddr(struct drm_gem_object *obj)
24{
25 struct msm_gem_object *msm_obj = to_msm_bo(obj);
26 struct msm_drm_private *priv = obj->dev->dev_private;
27 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
28 priv->vram.paddr;
29}
30
31static bool use_pages(struct drm_gem_object *obj)
32{
33 struct msm_gem_object *msm_obj = to_msm_bo(obj);
34 return !msm_obj->vram_node;
35}
36
37/*
38 * Cache sync.. this is a bit over-complicated, to fit dma-mapping
39 * API. Really GPU cache is out of scope here (handled on cmdstream)
40 * and all we need to do is invalidate newly allocated pages before
41 * mapping to CPU as uncached/writecombine.
42 *
43 * On top of this, we have the added headache, that depending on
44 * display generation, the display's iommu may be wired up to either
45 * the toplevel drm device (mdss), or to the mdp sub-node, meaning
46 * that here we either have dma-direct or iommu ops.
47 *
48 * Let this be a cautionary tail of abstraction gone wrong.
49 */
50
51static void sync_for_device(struct msm_gem_object *msm_obj)
52{
53 struct device *dev = msm_obj->base.dev->dev;
54
55 if (get_dma_ops(dev) && IS_ENABLED(CONFIG_ARM64)) {
56 dma_sync_sg_for_device(dev, msm_obj->sgt->sgl,
57 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
58 } else {
59 dma_map_sg(dev, msm_obj->sgt->sgl,
60 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
61 }
62}
63
64static void sync_for_cpu(struct msm_gem_object *msm_obj)
65{
66 struct device *dev = msm_obj->base.dev->dev;
67
68 if (get_dma_ops(dev) && IS_ENABLED(CONFIG_ARM64)) {
69 dma_sync_sg_for_cpu(dev, msm_obj->sgt->sgl,
70 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
71 } else {
72 dma_unmap_sg(dev, msm_obj->sgt->sgl,
73 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
74 }
75}
76
77/* allocate pages from VRAM carveout, used when no IOMMU: */
78static struct page **get_pages_vram(struct drm_gem_object *obj, int npages)
79{
80 struct msm_gem_object *msm_obj = to_msm_bo(obj);
81 struct msm_drm_private *priv = obj->dev->dev_private;
82 dma_addr_t paddr;
83 struct page **p;
84 int ret, i;
85
86 p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
87 if (!p)
88 return ERR_PTR(-ENOMEM);
89
90 spin_lock(&priv->vram.lock);
91 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages);
92 spin_unlock(&priv->vram.lock);
93 if (ret) {
94 kvfree(p);
95 return ERR_PTR(ret);
96 }
97
98 paddr = physaddr(obj);
99 for (i = 0; i < npages; i++) {
100 p[i] = phys_to_page(paddr);
101 paddr += PAGE_SIZE;
102 }
103
104 return p;
105}
106
107static struct page **get_pages(struct drm_gem_object *obj)
108{
109 struct msm_gem_object *msm_obj = to_msm_bo(obj);
110
111 if (!msm_obj->pages) {
112 struct drm_device *dev = obj->dev;
113 struct page **p;
114 int npages = obj->size >> PAGE_SHIFT;
115
116 if (use_pages(obj))
117 p = drm_gem_get_pages(obj);
118 else
119 p = get_pages_vram(obj, npages);
120
121 if (IS_ERR(p)) {
122 DRM_DEV_ERROR(dev->dev, "could not get pages: %ld\n",
123 PTR_ERR(p));
124 return p;
125 }
126
127 msm_obj->pages = p;
128
129 msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
130 if (IS_ERR(msm_obj->sgt)) {
131 void *ptr = ERR_CAST(msm_obj->sgt);
132
133 DRM_DEV_ERROR(dev->dev, "failed to allocate sgt\n");
134 msm_obj->sgt = NULL;
135 return ptr;
136 }
137
138 /* For non-cached buffers, ensure the new pages are clean
139 * because display controller, GPU, etc. are not coherent:
140 */
141 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
142 sync_for_device(msm_obj);
143 }
144
145 return msm_obj->pages;
146}
147
148static void put_pages_vram(struct drm_gem_object *obj)
149{
150 struct msm_gem_object *msm_obj = to_msm_bo(obj);
151 struct msm_drm_private *priv = obj->dev->dev_private;
152
153 spin_lock(&priv->vram.lock);
154 drm_mm_remove_node(msm_obj->vram_node);
155 spin_unlock(&priv->vram.lock);
156
157 kvfree(msm_obj->pages);
158}
159
160static void put_pages(struct drm_gem_object *obj)
161{
162 struct msm_gem_object *msm_obj = to_msm_bo(obj);
163
164 if (msm_obj->pages) {
165 if (msm_obj->sgt) {
166 /* For non-cached buffers, ensure the new
167 * pages are clean because display controller,
168 * GPU, etc. are not coherent:
169 */
170 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
171 sync_for_cpu(msm_obj);
172
173 sg_free_table(msm_obj->sgt);
174 kfree(msm_obj->sgt);
175 }
176
177 if (use_pages(obj))
178 drm_gem_put_pages(obj, msm_obj->pages, true, false);
179 else
180 put_pages_vram(obj);
181
182 msm_obj->pages = NULL;
183 }
184}
185
186struct page **msm_gem_get_pages(struct drm_gem_object *obj)
187{
188 struct msm_gem_object *msm_obj = to_msm_bo(obj);
189 struct page **p;
190
191 mutex_lock(&msm_obj->lock);
192
193 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
194 mutex_unlock(&msm_obj->lock);
195 return ERR_PTR(-EBUSY);
196 }
197
198 p = get_pages(obj);
199 mutex_unlock(&msm_obj->lock);
200 return p;
201}
202
203void msm_gem_put_pages(struct drm_gem_object *obj)
204{
205 /* when we start tracking the pin count, then do something here */
206}
207
208int msm_gem_mmap_obj(struct drm_gem_object *obj,
209 struct vm_area_struct *vma)
210{
211 struct msm_gem_object *msm_obj = to_msm_bo(obj);
212
213 vma->vm_flags &= ~VM_PFNMAP;
214 vma->vm_flags |= VM_MIXEDMAP;
215
216 if (msm_obj->flags & MSM_BO_WC) {
217 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
218 } else if (msm_obj->flags & MSM_BO_UNCACHED) {
219 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
220 } else {
221 /*
222 * Shunt off cached objs to shmem file so they have their own
223 * address_space (so unmap_mapping_range does what we want,
224 * in particular in the case of mmap'd dmabufs)
225 */
226 fput(vma->vm_file);
227 get_file(obj->filp);
228 vma->vm_pgoff = 0;
229 vma->vm_file = obj->filp;
230
231 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
232 }
233
234 return 0;
235}
236
237int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
238{
239 int ret;
240
241 ret = drm_gem_mmap(filp, vma);
242 if (ret) {
243 DBG("mmap failed: %d", ret);
244 return ret;
245 }
246
247 return msm_gem_mmap_obj(vma->vm_private_data, vma);
248}
249
250vm_fault_t msm_gem_fault(struct vm_fault *vmf)
251{
252 struct vm_area_struct *vma = vmf->vma;
253 struct drm_gem_object *obj = vma->vm_private_data;
254 struct msm_gem_object *msm_obj = to_msm_bo(obj);
255 struct page **pages;
256 unsigned long pfn;
257 pgoff_t pgoff;
258 int err;
259 vm_fault_t ret;
260
261 /*
262 * vm_ops.open/drm_gem_mmap_obj and close get and put
263 * a reference on obj. So, we dont need to hold one here.
264 */
265 err = mutex_lock_interruptible(&msm_obj->lock);
266 if (err) {
267 ret = VM_FAULT_NOPAGE;
268 goto out;
269 }
270
271 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
272 mutex_unlock(&msm_obj->lock);
273 return VM_FAULT_SIGBUS;
274 }
275
276 /* make sure we have pages attached now */
277 pages = get_pages(obj);
278 if (IS_ERR(pages)) {
279 ret = vmf_error(PTR_ERR(pages));
280 goto out_unlock;
281 }
282
283 /* We don't use vmf->pgoff since that has the fake offset: */
284 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
285
286 pfn = page_to_pfn(pages[pgoff]);
287
288 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
289 pfn, pfn << PAGE_SHIFT);
290
291 ret = vmf_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
292out_unlock:
293 mutex_unlock(&msm_obj->lock);
294out:
295 return ret;
296}
297
298/** get mmap offset */
299static uint64_t mmap_offset(struct drm_gem_object *obj)
300{
301 struct drm_device *dev = obj->dev;
302 struct msm_gem_object *msm_obj = to_msm_bo(obj);
303 int ret;
304
305 WARN_ON(!mutex_is_locked(&msm_obj->lock));
306
307 /* Make it mmapable */
308 ret = drm_gem_create_mmap_offset(obj);
309
310 if (ret) {
311 DRM_DEV_ERROR(dev->dev, "could not allocate mmap offset\n");
312 return 0;
313 }
314
315 return drm_vma_node_offset_addr(&obj->vma_node);
316}
317
318uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
319{
320 uint64_t offset;
321 struct msm_gem_object *msm_obj = to_msm_bo(obj);
322
323 mutex_lock(&msm_obj->lock);
324 offset = mmap_offset(obj);
325 mutex_unlock(&msm_obj->lock);
326 return offset;
327}
328
329static struct msm_gem_vma *add_vma(struct drm_gem_object *obj,
330 struct msm_gem_address_space *aspace)
331{
332 struct msm_gem_object *msm_obj = to_msm_bo(obj);
333 struct msm_gem_vma *vma;
334
335 WARN_ON(!mutex_is_locked(&msm_obj->lock));
336
337 vma = kzalloc(sizeof(*vma), GFP_KERNEL);
338 if (!vma)
339 return ERR_PTR(-ENOMEM);
340
341 vma->aspace = aspace;
342
343 list_add_tail(&vma->list, &msm_obj->vmas);
344
345 return vma;
346}
347
348static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj,
349 struct msm_gem_address_space *aspace)
350{
351 struct msm_gem_object *msm_obj = to_msm_bo(obj);
352 struct msm_gem_vma *vma;
353
354 WARN_ON(!mutex_is_locked(&msm_obj->lock));
355
356 list_for_each_entry(vma, &msm_obj->vmas, list) {
357 if (vma->aspace == aspace)
358 return vma;
359 }
360
361 return NULL;
362}
363
364static void del_vma(struct msm_gem_vma *vma)
365{
366 if (!vma)
367 return;
368
369 list_del(&vma->list);
370 kfree(vma);
371}
372
373/* Called with msm_obj->lock locked */
374static void
375put_iova(struct drm_gem_object *obj)
376{
377 struct msm_gem_object *msm_obj = to_msm_bo(obj);
378 struct msm_gem_vma *vma, *tmp;
379
380 WARN_ON(!mutex_is_locked(&msm_obj->lock));
381
382 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) {
383 if (vma->aspace) {
384 msm_gem_purge_vma(vma->aspace, vma);
385 msm_gem_close_vma(vma->aspace, vma);
386 }
387 del_vma(vma);
388 }
389}
390
391static int msm_gem_get_iova_locked(struct drm_gem_object *obj,
392 struct msm_gem_address_space *aspace, uint64_t *iova,
393 u64 range_start, u64 range_end)
394{
395 struct msm_gem_object *msm_obj = to_msm_bo(obj);
396 struct msm_gem_vma *vma;
397 int ret = 0;
398
399 WARN_ON(!mutex_is_locked(&msm_obj->lock));
400
401 vma = lookup_vma(obj, aspace);
402
403 if (!vma) {
404 vma = add_vma(obj, aspace);
405 if (IS_ERR(vma))
406 return PTR_ERR(vma);
407
408 ret = msm_gem_init_vma(aspace, vma, obj->size >> PAGE_SHIFT,
409 range_start, range_end);
410 if (ret) {
411 del_vma(vma);
412 return ret;
413 }
414 }
415
416 *iova = vma->iova;
417 return 0;
418}
419
420static int msm_gem_pin_iova(struct drm_gem_object *obj,
421 struct msm_gem_address_space *aspace)
422{
423 struct msm_gem_object *msm_obj = to_msm_bo(obj);
424 struct msm_gem_vma *vma;
425 struct page **pages;
426 int prot = IOMMU_READ;
427
428 if (!(msm_obj->flags & MSM_BO_GPU_READONLY))
429 prot |= IOMMU_WRITE;
430
431 if (msm_obj->flags & MSM_BO_MAP_PRIV)
432 prot |= IOMMU_PRIV;
433
434 WARN_ON(!mutex_is_locked(&msm_obj->lock));
435
436 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED))
437 return -EBUSY;
438
439 vma = lookup_vma(obj, aspace);
440 if (WARN_ON(!vma))
441 return -EINVAL;
442
443 pages = get_pages(obj);
444 if (IS_ERR(pages))
445 return PTR_ERR(pages);
446
447 return msm_gem_map_vma(aspace, vma, prot,
448 msm_obj->sgt, obj->size >> PAGE_SHIFT);
449}
450
451/*
452 * get iova and pin it. Should have a matching put
453 * limits iova to specified range (in pages)
454 */
455int msm_gem_get_and_pin_iova_range(struct drm_gem_object *obj,
456 struct msm_gem_address_space *aspace, uint64_t *iova,
457 u64 range_start, u64 range_end)
458{
459 struct msm_gem_object *msm_obj = to_msm_bo(obj);
460 u64 local;
461 int ret;
462
463 mutex_lock(&msm_obj->lock);
464
465 ret = msm_gem_get_iova_locked(obj, aspace, &local,
466 range_start, range_end);
467
468 if (!ret)
469 ret = msm_gem_pin_iova(obj, aspace);
470
471 if (!ret)
472 *iova = local;
473
474 mutex_unlock(&msm_obj->lock);
475 return ret;
476}
477
478/* get iova and pin it. Should have a matching put */
479int msm_gem_get_and_pin_iova(struct drm_gem_object *obj,
480 struct msm_gem_address_space *aspace, uint64_t *iova)
481{
482 return msm_gem_get_and_pin_iova_range(obj, aspace, iova, 0, U64_MAX);
483}
484
485/*
486 * Get an iova but don't pin it. Doesn't need a put because iovas are currently
487 * valid for the life of the object
488 */
489int msm_gem_get_iova(struct drm_gem_object *obj,
490 struct msm_gem_address_space *aspace, uint64_t *iova)
491{
492 struct msm_gem_object *msm_obj = to_msm_bo(obj);
493 int ret;
494
495 mutex_lock(&msm_obj->lock);
496 ret = msm_gem_get_iova_locked(obj, aspace, iova, 0, U64_MAX);
497 mutex_unlock(&msm_obj->lock);
498
499 return ret;
500}
501
502/* get iova without taking a reference, used in places where you have
503 * already done a 'msm_gem_get_and_pin_iova' or 'msm_gem_get_iova'
504 */
505uint64_t msm_gem_iova(struct drm_gem_object *obj,
506 struct msm_gem_address_space *aspace)
507{
508 struct msm_gem_object *msm_obj = to_msm_bo(obj);
509 struct msm_gem_vma *vma;
510
511 mutex_lock(&msm_obj->lock);
512 vma = lookup_vma(obj, aspace);
513 mutex_unlock(&msm_obj->lock);
514 WARN_ON(!vma);
515
516 return vma ? vma->iova : 0;
517}
518
519/*
520 * Unpin a iova by updating the reference counts. The memory isn't actually
521 * purged until something else (shrinker, mm_notifier, destroy, etc) decides
522 * to get rid of it
523 */
524void msm_gem_unpin_iova(struct drm_gem_object *obj,
525 struct msm_gem_address_space *aspace)
526{
527 struct msm_gem_object *msm_obj = to_msm_bo(obj);
528 struct msm_gem_vma *vma;
529
530 mutex_lock(&msm_obj->lock);
531 vma = lookup_vma(obj, aspace);
532
533 if (!WARN_ON(!vma))
534 msm_gem_unmap_vma(aspace, vma);
535
536 mutex_unlock(&msm_obj->lock);
537}
538
539int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
540 struct drm_mode_create_dumb *args)
541{
542 args->pitch = align_pitch(args->width, args->bpp);
543 args->size = PAGE_ALIGN(args->pitch * args->height);
544 return msm_gem_new_handle(dev, file, args->size,
545 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle, "dumb");
546}
547
548int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
549 uint32_t handle, uint64_t *offset)
550{
551 struct drm_gem_object *obj;
552 int ret = 0;
553
554 /* GEM does all our handle to object mapping */
555 obj = drm_gem_object_lookup(file, handle);
556 if (obj == NULL) {
557 ret = -ENOENT;
558 goto fail;
559 }
560
561 *offset = msm_gem_mmap_offset(obj);
562
563 drm_gem_object_put(obj);
564
565fail:
566 return ret;
567}
568
569static void *get_vaddr(struct drm_gem_object *obj, unsigned madv)
570{
571 struct msm_gem_object *msm_obj = to_msm_bo(obj);
572 int ret = 0;
573
574 if (obj->import_attach)
575 return ERR_PTR(-ENODEV);
576
577 mutex_lock(&msm_obj->lock);
578
579 if (WARN_ON(msm_obj->madv > madv)) {
580 DRM_DEV_ERROR(obj->dev->dev, "Invalid madv state: %u vs %u\n",
581 msm_obj->madv, madv);
582 mutex_unlock(&msm_obj->lock);
583 return ERR_PTR(-EBUSY);
584 }
585
586 /* increment vmap_count *before* vmap() call, so shrinker can
587 * check vmap_count (is_vunmapable()) outside of msm_obj->lock.
588 * This guarantees that we won't try to msm_gem_vunmap() this
589 * same object from within the vmap() call (while we already
590 * hold msm_obj->lock)
591 */
592 msm_obj->vmap_count++;
593
594 if (!msm_obj->vaddr) {
595 struct page **pages = get_pages(obj);
596 if (IS_ERR(pages)) {
597 ret = PTR_ERR(pages);
598 goto fail;
599 }
600 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
601 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
602 if (msm_obj->vaddr == NULL) {
603 ret = -ENOMEM;
604 goto fail;
605 }
606 }
607
608 mutex_unlock(&msm_obj->lock);
609 return msm_obj->vaddr;
610
611fail:
612 msm_obj->vmap_count--;
613 mutex_unlock(&msm_obj->lock);
614 return ERR_PTR(ret);
615}
616
617void *msm_gem_get_vaddr(struct drm_gem_object *obj)
618{
619 return get_vaddr(obj, MSM_MADV_WILLNEED);
620}
621
622/*
623 * Don't use this! It is for the very special case of dumping
624 * submits from GPU hangs or faults, were the bo may already
625 * be MSM_MADV_DONTNEED, but we know the buffer is still on the
626 * active list.
627 */
628void *msm_gem_get_vaddr_active(struct drm_gem_object *obj)
629{
630 return get_vaddr(obj, __MSM_MADV_PURGED);
631}
632
633void msm_gem_put_vaddr(struct drm_gem_object *obj)
634{
635 struct msm_gem_object *msm_obj = to_msm_bo(obj);
636
637 mutex_lock(&msm_obj->lock);
638 WARN_ON(msm_obj->vmap_count < 1);
639 msm_obj->vmap_count--;
640 mutex_unlock(&msm_obj->lock);
641}
642
643/* Update madvise status, returns true if not purged, else
644 * false or -errno.
645 */
646int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv)
647{
648 struct msm_gem_object *msm_obj = to_msm_bo(obj);
649
650 mutex_lock(&msm_obj->lock);
651
652 WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
653
654 if (msm_obj->madv != __MSM_MADV_PURGED)
655 msm_obj->madv = madv;
656
657 madv = msm_obj->madv;
658
659 mutex_unlock(&msm_obj->lock);
660
661 return (madv != __MSM_MADV_PURGED);
662}
663
664void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass)
665{
666 struct drm_device *dev = obj->dev;
667 struct msm_gem_object *msm_obj = to_msm_bo(obj);
668
669 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
670 WARN_ON(!is_purgeable(msm_obj));
671 WARN_ON(obj->import_attach);
672
673 mutex_lock_nested(&msm_obj->lock, subclass);
674
675 put_iova(obj);
676
677 msm_gem_vunmap_locked(obj);
678
679 put_pages(obj);
680
681 msm_obj->madv = __MSM_MADV_PURGED;
682
683 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
684 drm_gem_free_mmap_offset(obj);
685
686 /* Our goal here is to return as much of the memory as
687 * is possible back to the system as we are called from OOM.
688 * To do this we must instruct the shmfs to drop all of its
689 * backing pages, *now*.
690 */
691 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1);
692
693 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping,
694 0, (loff_t)-1);
695
696 mutex_unlock(&msm_obj->lock);
697}
698
699static void msm_gem_vunmap_locked(struct drm_gem_object *obj)
700{
701 struct msm_gem_object *msm_obj = to_msm_bo(obj);
702
703 WARN_ON(!mutex_is_locked(&msm_obj->lock));
704
705 if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj)))
706 return;
707
708 vunmap(msm_obj->vaddr);
709 msm_obj->vaddr = NULL;
710}
711
712void msm_gem_vunmap(struct drm_gem_object *obj, enum msm_gem_lock subclass)
713{
714 struct msm_gem_object *msm_obj = to_msm_bo(obj);
715
716 mutex_lock_nested(&msm_obj->lock, subclass);
717 msm_gem_vunmap_locked(obj);
718 mutex_unlock(&msm_obj->lock);
719}
720
721/* must be called before _move_to_active().. */
722int msm_gem_sync_object(struct drm_gem_object *obj,
723 struct msm_fence_context *fctx, bool exclusive)
724{
725 struct dma_resv_list *fobj;
726 struct dma_fence *fence;
727 int i, ret;
728
729 fobj = dma_resv_get_list(obj->resv);
730 if (!fobj || (fobj->shared_count == 0)) {
731 fence = dma_resv_get_excl(obj->resv);
732 /* don't need to wait on our own fences, since ring is fifo */
733 if (fence && (fence->context != fctx->context)) {
734 ret = dma_fence_wait(fence, true);
735 if (ret)
736 return ret;
737 }
738 }
739
740 if (!exclusive || !fobj)
741 return 0;
742
743 for (i = 0; i < fobj->shared_count; i++) {
744 fence = rcu_dereference_protected(fobj->shared[i],
745 dma_resv_held(obj->resv));
746 if (fence->context != fctx->context) {
747 ret = dma_fence_wait(fence, true);
748 if (ret)
749 return ret;
750 }
751 }
752
753 return 0;
754}
755
756void msm_gem_move_to_active(struct drm_gem_object *obj,
757 struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence)
758{
759 struct msm_gem_object *msm_obj = to_msm_bo(obj);
760 WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED);
761 msm_obj->gpu = gpu;
762 if (exclusive)
763 dma_resv_add_excl_fence(obj->resv, fence);
764 else
765 dma_resv_add_shared_fence(obj->resv, fence);
766 list_del_init(&msm_obj->mm_list);
767 list_add_tail(&msm_obj->mm_list, &gpu->active_list);
768}
769
770void msm_gem_move_to_inactive(struct drm_gem_object *obj)
771{
772 struct drm_device *dev = obj->dev;
773 struct msm_drm_private *priv = dev->dev_private;
774 struct msm_gem_object *msm_obj = to_msm_bo(obj);
775
776 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
777
778 msm_obj->gpu = NULL;
779 list_del_init(&msm_obj->mm_list);
780 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
781}
782
783int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
784{
785 bool write = !!(op & MSM_PREP_WRITE);
786 unsigned long remain =
787 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout);
788 long ret;
789
790 ret = dma_resv_wait_timeout_rcu(obj->resv, write,
791 true, remain);
792 if (ret == 0)
793 return remain == 0 ? -EBUSY : -ETIMEDOUT;
794 else if (ret < 0)
795 return ret;
796
797 /* TODO cache maintenance */
798
799 return 0;
800}
801
802int msm_gem_cpu_fini(struct drm_gem_object *obj)
803{
804 /* TODO cache maintenance */
805 return 0;
806}
807
808#ifdef CONFIG_DEBUG_FS
809static void describe_fence(struct dma_fence *fence, const char *type,
810 struct seq_file *m)
811{
812 if (!dma_fence_is_signaled(fence))
813 seq_printf(m, "\t%9s: %s %s seq %llu\n", type,
814 fence->ops->get_driver_name(fence),
815 fence->ops->get_timeline_name(fence),
816 fence->seqno);
817}
818
819void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
820{
821 struct msm_gem_object *msm_obj = to_msm_bo(obj);
822 struct dma_resv *robj = obj->resv;
823 struct dma_resv_list *fobj;
824 struct dma_fence *fence;
825 struct msm_gem_vma *vma;
826 uint64_t off = drm_vma_node_start(&obj->vma_node);
827 const char *madv;
828
829 mutex_lock(&msm_obj->lock);
830
831 switch (msm_obj->madv) {
832 case __MSM_MADV_PURGED:
833 madv = " purged";
834 break;
835 case MSM_MADV_DONTNEED:
836 madv = " purgeable";
837 break;
838 case MSM_MADV_WILLNEED:
839 default:
840 madv = "";
841 break;
842 }
843
844 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p",
845 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
846 obj->name, kref_read(&obj->refcount),
847 off, msm_obj->vaddr);
848
849 seq_printf(m, " %08zu %9s %-32s\n", obj->size, madv, msm_obj->name);
850
851 if (!list_empty(&msm_obj->vmas)) {
852
853 seq_puts(m, " vmas:");
854
855 list_for_each_entry(vma, &msm_obj->vmas, list)
856 seq_printf(m, " [%s: %08llx,%s,inuse=%d]",
857 vma->aspace != NULL ? vma->aspace->name : NULL,
858 vma->iova, vma->mapped ? "mapped" : "unmapped",
859 vma->inuse);
860
861 seq_puts(m, "\n");
862 }
863
864 rcu_read_lock();
865 fobj = rcu_dereference(robj->fence);
866 if (fobj) {
867 unsigned int i, shared_count = fobj->shared_count;
868
869 for (i = 0; i < shared_count; i++) {
870 fence = rcu_dereference(fobj->shared[i]);
871 describe_fence(fence, "Shared", m);
872 }
873 }
874
875 fence = rcu_dereference(robj->fence_excl);
876 if (fence)
877 describe_fence(fence, "Exclusive", m);
878 rcu_read_unlock();
879
880 mutex_unlock(&msm_obj->lock);
881}
882
883void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
884{
885 struct msm_gem_object *msm_obj;
886 int count = 0;
887 size_t size = 0;
888
889 seq_puts(m, " flags id ref offset kaddr size madv name\n");
890 list_for_each_entry(msm_obj, list, mm_list) {
891 struct drm_gem_object *obj = &msm_obj->base;
892 seq_puts(m, " ");
893 msm_gem_describe(obj, m);
894 count++;
895 size += obj->size;
896 }
897
898 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
899}
900#endif
901
902/* don't call directly! Use drm_gem_object_put_locked() and friends */
903void msm_gem_free_object(struct drm_gem_object *obj)
904{
905 struct msm_gem_object *msm_obj = to_msm_bo(obj);
906 struct drm_device *dev = obj->dev;
907 struct msm_drm_private *priv = dev->dev_private;
908
909 if (llist_add(&msm_obj->freed, &priv->free_list))
910 queue_work(priv->wq, &priv->free_work);
911}
912
913static void free_object(struct msm_gem_object *msm_obj)
914{
915 struct drm_gem_object *obj = &msm_obj->base;
916 struct drm_device *dev = obj->dev;
917
918 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
919
920 /* object should not be on active list: */
921 WARN_ON(is_active(msm_obj));
922
923 list_del(&msm_obj->mm_list);
924
925 mutex_lock(&msm_obj->lock);
926
927 put_iova(obj);
928
929 if (obj->import_attach) {
930 WARN_ON(msm_obj->vaddr);
931
932 /* Don't drop the pages for imported dmabuf, as they are not
933 * ours, just free the array we allocated:
934 */
935 if (msm_obj->pages)
936 kvfree(msm_obj->pages);
937
938 drm_prime_gem_destroy(obj, msm_obj->sgt);
939 } else {
940 msm_gem_vunmap_locked(obj);
941 put_pages(obj);
942 }
943
944 drm_gem_object_release(obj);
945
946 mutex_unlock(&msm_obj->lock);
947 kfree(msm_obj);
948}
949
950void msm_gem_free_work(struct work_struct *work)
951{
952 struct msm_drm_private *priv =
953 container_of(work, struct msm_drm_private, free_work);
954 struct drm_device *dev = priv->dev;
955 struct llist_node *freed;
956 struct msm_gem_object *msm_obj, *next;
957
958 while ((freed = llist_del_all(&priv->free_list))) {
959
960 mutex_lock(&dev->struct_mutex);
961
962 llist_for_each_entry_safe(msm_obj, next,
963 freed, freed)
964 free_object(msm_obj);
965
966 mutex_unlock(&dev->struct_mutex);
967
968 if (need_resched())
969 break;
970 }
971}
972
973/* convenience method to construct a GEM buffer object, and userspace handle */
974int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
975 uint32_t size, uint32_t flags, uint32_t *handle,
976 char *name)
977{
978 struct drm_gem_object *obj;
979 int ret;
980
981 obj = msm_gem_new(dev, size, flags);
982
983 if (IS_ERR(obj))
984 return PTR_ERR(obj);
985
986 if (name)
987 msm_gem_object_set_name(obj, "%s", name);
988
989 ret = drm_gem_handle_create(file, obj, handle);
990
991 /* drop reference from allocate - handle holds it now */
992 drm_gem_object_put(obj);
993
994 return ret;
995}
996
997static int msm_gem_new_impl(struct drm_device *dev,
998 uint32_t size, uint32_t flags,
999 struct drm_gem_object **obj)
1000{
1001 struct msm_gem_object *msm_obj;
1002
1003 switch (flags & MSM_BO_CACHE_MASK) {
1004 case MSM_BO_UNCACHED:
1005 case MSM_BO_CACHED:
1006 case MSM_BO_WC:
1007 break;
1008 default:
1009 DRM_DEV_ERROR(dev->dev, "invalid cache flag: %x\n",
1010 (flags & MSM_BO_CACHE_MASK));
1011 return -EINVAL;
1012 }
1013
1014 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL);
1015 if (!msm_obj)
1016 return -ENOMEM;
1017
1018 mutex_init(&msm_obj->lock);
1019
1020 msm_obj->flags = flags;
1021 msm_obj->madv = MSM_MADV_WILLNEED;
1022
1023 INIT_LIST_HEAD(&msm_obj->submit_entry);
1024 INIT_LIST_HEAD(&msm_obj->vmas);
1025
1026 *obj = &msm_obj->base;
1027
1028 return 0;
1029}
1030
1031static struct drm_gem_object *_msm_gem_new(struct drm_device *dev,
1032 uint32_t size, uint32_t flags, bool struct_mutex_locked)
1033{
1034 struct msm_drm_private *priv = dev->dev_private;
1035 struct msm_gem_object *msm_obj;
1036 struct drm_gem_object *obj = NULL;
1037 bool use_vram = false;
1038 int ret;
1039
1040 size = PAGE_ALIGN(size);
1041
1042 if (!msm_use_mmu(dev))
1043 use_vram = true;
1044 else if ((flags & (MSM_BO_STOLEN | MSM_BO_SCANOUT)) && priv->vram.size)
1045 use_vram = true;
1046
1047 if (WARN_ON(use_vram && !priv->vram.size))
1048 return ERR_PTR(-EINVAL);
1049
1050 /* Disallow zero sized objects as they make the underlying
1051 * infrastructure grumpy
1052 */
1053 if (size == 0)
1054 return ERR_PTR(-EINVAL);
1055
1056 ret = msm_gem_new_impl(dev, size, flags, &obj);
1057 if (ret)
1058 goto fail;
1059
1060 msm_obj = to_msm_bo(obj);
1061
1062 if (use_vram) {
1063 struct msm_gem_vma *vma;
1064 struct page **pages;
1065
1066 mutex_lock(&msm_obj->lock);
1067
1068 vma = add_vma(obj, NULL);
1069 mutex_unlock(&msm_obj->lock);
1070 if (IS_ERR(vma)) {
1071 ret = PTR_ERR(vma);
1072 goto fail;
1073 }
1074
1075 to_msm_bo(obj)->vram_node = &vma->node;
1076
1077 drm_gem_private_object_init(dev, obj, size);
1078
1079 pages = get_pages(obj);
1080 if (IS_ERR(pages)) {
1081 ret = PTR_ERR(pages);
1082 goto fail;
1083 }
1084
1085 vma->iova = physaddr(obj);
1086 } else {
1087 ret = drm_gem_object_init(dev, obj, size);
1088 if (ret)
1089 goto fail;
1090 /*
1091 * Our buffers are kept pinned, so allocating them from the
1092 * MOVABLE zone is a really bad idea, and conflicts with CMA.
1093 * See comments above new_inode() why this is required _and_
1094 * expected if you're going to pin these pages.
1095 */
1096 mapping_set_gfp_mask(obj->filp->f_mapping, GFP_HIGHUSER);
1097 }
1098
1099 if (struct_mutex_locked) {
1100 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
1101 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
1102 } else {
1103 mutex_lock(&dev->struct_mutex);
1104 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
1105 mutex_unlock(&dev->struct_mutex);
1106 }
1107
1108 return obj;
1109
1110fail:
1111 drm_gem_object_put(obj);
1112 return ERR_PTR(ret);
1113}
1114
1115struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev,
1116 uint32_t size, uint32_t flags)
1117{
1118 return _msm_gem_new(dev, size, flags, true);
1119}
1120
1121struct drm_gem_object *msm_gem_new(struct drm_device *dev,
1122 uint32_t size, uint32_t flags)
1123{
1124 return _msm_gem_new(dev, size, flags, false);
1125}
1126
1127struct drm_gem_object *msm_gem_import(struct drm_device *dev,
1128 struct dma_buf *dmabuf, struct sg_table *sgt)
1129{
1130 struct msm_drm_private *priv = dev->dev_private;
1131 struct msm_gem_object *msm_obj;
1132 struct drm_gem_object *obj;
1133 uint32_t size;
1134 int ret, npages;
1135
1136 /* if we don't have IOMMU, don't bother pretending we can import: */
1137 if (!msm_use_mmu(dev)) {
1138 DRM_DEV_ERROR(dev->dev, "cannot import without IOMMU\n");
1139 return ERR_PTR(-EINVAL);
1140 }
1141
1142 size = PAGE_ALIGN(dmabuf->size);
1143
1144 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj);
1145 if (ret)
1146 goto fail;
1147
1148 drm_gem_private_object_init(dev, obj, size);
1149
1150 npages = size / PAGE_SIZE;
1151
1152 msm_obj = to_msm_bo(obj);
1153 mutex_lock(&msm_obj->lock);
1154 msm_obj->sgt = sgt;
1155 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1156 if (!msm_obj->pages) {
1157 mutex_unlock(&msm_obj->lock);
1158 ret = -ENOMEM;
1159 goto fail;
1160 }
1161
1162 ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages);
1163 if (ret) {
1164 mutex_unlock(&msm_obj->lock);
1165 goto fail;
1166 }
1167
1168 mutex_unlock(&msm_obj->lock);
1169
1170 mutex_lock(&dev->struct_mutex);
1171 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
1172 mutex_unlock(&dev->struct_mutex);
1173
1174 return obj;
1175
1176fail:
1177 drm_gem_object_put(obj);
1178 return ERR_PTR(ret);
1179}
1180
1181static void *_msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
1182 uint32_t flags, struct msm_gem_address_space *aspace,
1183 struct drm_gem_object **bo, uint64_t *iova, bool locked)
1184{
1185 void *vaddr;
1186 struct drm_gem_object *obj = _msm_gem_new(dev, size, flags, locked);
1187 int ret;
1188
1189 if (IS_ERR(obj))
1190 return ERR_CAST(obj);
1191
1192 if (iova) {
1193 ret = msm_gem_get_and_pin_iova(obj, aspace, iova);
1194 if (ret)
1195 goto err;
1196 }
1197
1198 vaddr = msm_gem_get_vaddr(obj);
1199 if (IS_ERR(vaddr)) {
1200 msm_gem_unpin_iova(obj, aspace);
1201 ret = PTR_ERR(vaddr);
1202 goto err;
1203 }
1204
1205 if (bo)
1206 *bo = obj;
1207
1208 return vaddr;
1209err:
1210 if (locked)
1211 drm_gem_object_put_locked(obj);
1212 else
1213 drm_gem_object_put(obj);
1214
1215 return ERR_PTR(ret);
1216
1217}
1218
1219void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
1220 uint32_t flags, struct msm_gem_address_space *aspace,
1221 struct drm_gem_object **bo, uint64_t *iova)
1222{
1223 return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, false);
1224}
1225
1226void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size,
1227 uint32_t flags, struct msm_gem_address_space *aspace,
1228 struct drm_gem_object **bo, uint64_t *iova)
1229{
1230 return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, true);
1231}
1232
1233void msm_gem_kernel_put(struct drm_gem_object *bo,
1234 struct msm_gem_address_space *aspace, bool locked)
1235{
1236 if (IS_ERR_OR_NULL(bo))
1237 return;
1238
1239 msm_gem_put_vaddr(bo);
1240 msm_gem_unpin_iova(bo, aspace);
1241
1242 if (locked)
1243 drm_gem_object_put_locked(bo);
1244 else
1245 drm_gem_object_put(bo);
1246}
1247
1248void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...)
1249{
1250 struct msm_gem_object *msm_obj = to_msm_bo(bo);
1251 va_list ap;
1252
1253 if (!fmt)
1254 return;
1255
1256 va_start(ap, fmt);
1257 vsnprintf(msm_obj->name, sizeof(msm_obj->name), fmt, ap);
1258 va_end(ap);
1259}