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