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1/*
2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include <linux/spinlock.h>
19#include <linux/shmem_fs.h>
20#include <linux/dma-buf.h>
21#include <linux/pfn_t.h>
22
23#include "msm_drv.h"
24#include "msm_gem.h"
25#include "msm_gpu.h"
26#include "msm_mmu.h"
27
28static dma_addr_t physaddr(struct drm_gem_object *obj)
29{
30 struct msm_gem_object *msm_obj = to_msm_bo(obj);
31 struct msm_drm_private *priv = obj->dev->dev_private;
32 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
33 priv->vram.paddr;
34}
35
36static bool use_pages(struct drm_gem_object *obj)
37{
38 struct msm_gem_object *msm_obj = to_msm_bo(obj);
39 return !msm_obj->vram_node;
40}
41
42/* allocate pages from VRAM carveout, used when no IOMMU: */
43static struct page **get_pages_vram(struct drm_gem_object *obj,
44 int npages)
45{
46 struct msm_gem_object *msm_obj = to_msm_bo(obj);
47 struct msm_drm_private *priv = obj->dev->dev_private;
48 dma_addr_t paddr;
49 struct page **p;
50 int ret, i;
51
52 p = drm_malloc_ab(npages, sizeof(struct page *));
53 if (!p)
54 return ERR_PTR(-ENOMEM);
55
56 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node,
57 npages, 0, DRM_MM_SEARCH_DEFAULT);
58 if (ret) {
59 drm_free_large(p);
60 return ERR_PTR(ret);
61 }
62
63 paddr = physaddr(obj);
64 for (i = 0; i < npages; i++) {
65 p[i] = phys_to_page(paddr);
66 paddr += PAGE_SIZE;
67 }
68
69 return p;
70}
71
72/* called with dev->struct_mutex held */
73static struct page **get_pages(struct drm_gem_object *obj)
74{
75 struct msm_gem_object *msm_obj = to_msm_bo(obj);
76
77 if (!msm_obj->pages) {
78 struct drm_device *dev = obj->dev;
79 struct page **p;
80 int npages = obj->size >> PAGE_SHIFT;
81
82 if (use_pages(obj))
83 p = drm_gem_get_pages(obj);
84 else
85 p = get_pages_vram(obj, npages);
86
87 if (IS_ERR(p)) {
88 dev_err(dev->dev, "could not get pages: %ld\n",
89 PTR_ERR(p));
90 return p;
91 }
92
93 msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
94 if (IS_ERR(msm_obj->sgt)) {
95 dev_err(dev->dev, "failed to allocate sgt\n");
96 return ERR_CAST(msm_obj->sgt);
97 }
98
99 msm_obj->pages = p;
100
101 /* For non-cached buffers, ensure the new pages are clean
102 * because display controller, GPU, etc. are not coherent:
103 */
104 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
105 dma_map_sg(dev->dev, msm_obj->sgt->sgl,
106 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
107 }
108
109 return msm_obj->pages;
110}
111
112static void put_pages(struct drm_gem_object *obj)
113{
114 struct msm_gem_object *msm_obj = to_msm_bo(obj);
115
116 if (msm_obj->pages) {
117 /* For non-cached buffers, ensure the new pages are clean
118 * because display controller, GPU, etc. are not coherent:
119 */
120 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
121 dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
122 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
123 sg_free_table(msm_obj->sgt);
124 kfree(msm_obj->sgt);
125
126 if (use_pages(obj))
127 drm_gem_put_pages(obj, msm_obj->pages, true, false);
128 else {
129 drm_mm_remove_node(msm_obj->vram_node);
130 drm_free_large(msm_obj->pages);
131 }
132
133 msm_obj->pages = NULL;
134 }
135}
136
137struct page **msm_gem_get_pages(struct drm_gem_object *obj)
138{
139 struct drm_device *dev = obj->dev;
140 struct page **p;
141 mutex_lock(&dev->struct_mutex);
142 p = get_pages(obj);
143 mutex_unlock(&dev->struct_mutex);
144 return p;
145}
146
147void msm_gem_put_pages(struct drm_gem_object *obj)
148{
149 /* when we start tracking the pin count, then do something here */
150}
151
152int msm_gem_mmap_obj(struct drm_gem_object *obj,
153 struct vm_area_struct *vma)
154{
155 struct msm_gem_object *msm_obj = to_msm_bo(obj);
156
157 vma->vm_flags &= ~VM_PFNMAP;
158 vma->vm_flags |= VM_MIXEDMAP;
159
160 if (msm_obj->flags & MSM_BO_WC) {
161 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
162 } else if (msm_obj->flags & MSM_BO_UNCACHED) {
163 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
164 } else {
165 /*
166 * Shunt off cached objs to shmem file so they have their own
167 * address_space (so unmap_mapping_range does what we want,
168 * in particular in the case of mmap'd dmabufs)
169 */
170 fput(vma->vm_file);
171 get_file(obj->filp);
172 vma->vm_pgoff = 0;
173 vma->vm_file = obj->filp;
174
175 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
176 }
177
178 return 0;
179}
180
181int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
182{
183 int ret;
184
185 ret = drm_gem_mmap(filp, vma);
186 if (ret) {
187 DBG("mmap failed: %d", ret);
188 return ret;
189 }
190
191 return msm_gem_mmap_obj(vma->vm_private_data, vma);
192}
193
194int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
195{
196 struct drm_gem_object *obj = vma->vm_private_data;
197 struct drm_device *dev = obj->dev;
198 struct page **pages;
199 unsigned long pfn;
200 pgoff_t pgoff;
201 int ret;
202
203 /* Make sure we don't parallel update on a fault, nor move or remove
204 * something from beneath our feet
205 */
206 ret = mutex_lock_interruptible(&dev->struct_mutex);
207 if (ret)
208 goto out;
209
210 /* make sure we have pages attached now */
211 pages = get_pages(obj);
212 if (IS_ERR(pages)) {
213 ret = PTR_ERR(pages);
214 goto out_unlock;
215 }
216
217 /* We don't use vmf->pgoff since that has the fake offset: */
218 pgoff = ((unsigned long)vmf->virtual_address -
219 vma->vm_start) >> PAGE_SHIFT;
220
221 pfn = page_to_pfn(pages[pgoff]);
222
223 VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address,
224 pfn, pfn << PAGE_SHIFT);
225
226 ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address,
227 __pfn_to_pfn_t(pfn, PFN_DEV));
228
229out_unlock:
230 mutex_unlock(&dev->struct_mutex);
231out:
232 switch (ret) {
233 case -EAGAIN:
234 case 0:
235 case -ERESTARTSYS:
236 case -EINTR:
237 case -EBUSY:
238 /*
239 * EBUSY is ok: this just means that another thread
240 * already did the job.
241 */
242 return VM_FAULT_NOPAGE;
243 case -ENOMEM:
244 return VM_FAULT_OOM;
245 default:
246 return VM_FAULT_SIGBUS;
247 }
248}
249
250/** get mmap offset */
251static uint64_t mmap_offset(struct drm_gem_object *obj)
252{
253 struct drm_device *dev = obj->dev;
254 int ret;
255
256 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
257
258 /* Make it mmapable */
259 ret = drm_gem_create_mmap_offset(obj);
260
261 if (ret) {
262 dev_err(dev->dev, "could not allocate mmap offset\n");
263 return 0;
264 }
265
266 return drm_vma_node_offset_addr(&obj->vma_node);
267}
268
269uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
270{
271 uint64_t offset;
272 mutex_lock(&obj->dev->struct_mutex);
273 offset = mmap_offset(obj);
274 mutex_unlock(&obj->dev->struct_mutex);
275 return offset;
276}
277
278/* should be called under struct_mutex.. although it can be called
279 * from atomic context without struct_mutex to acquire an extra
280 * iova ref if you know one is already held.
281 *
282 * That means when I do eventually need to add support for unpinning
283 * the refcnt counter needs to be atomic_t.
284 */
285int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id,
286 uint32_t *iova)
287{
288 struct msm_gem_object *msm_obj = to_msm_bo(obj);
289 int ret = 0;
290
291 if (!msm_obj->domain[id].iova) {
292 struct msm_drm_private *priv = obj->dev->dev_private;
293 struct page **pages = get_pages(obj);
294
295 if (IS_ERR(pages))
296 return PTR_ERR(pages);
297
298 if (iommu_present(&platform_bus_type)) {
299 struct msm_mmu *mmu = priv->mmus[id];
300 uint32_t offset;
301
302 if (WARN_ON(!mmu))
303 return -EINVAL;
304
305 offset = (uint32_t)mmap_offset(obj);
306 ret = mmu->funcs->map(mmu, offset, msm_obj->sgt,
307 obj->size, IOMMU_READ | IOMMU_WRITE);
308 msm_obj->domain[id].iova = offset;
309 } else {
310 msm_obj->domain[id].iova = physaddr(obj);
311 }
312 }
313
314 if (!ret)
315 *iova = msm_obj->domain[id].iova;
316
317 return ret;
318}
319
320/* get iova, taking a reference. Should have a matching put */
321int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova)
322{
323 struct msm_gem_object *msm_obj = to_msm_bo(obj);
324 int ret;
325
326 /* this is safe right now because we don't unmap until the
327 * bo is deleted:
328 */
329 if (msm_obj->domain[id].iova) {
330 *iova = msm_obj->domain[id].iova;
331 return 0;
332 }
333
334 mutex_lock(&obj->dev->struct_mutex);
335 ret = msm_gem_get_iova_locked(obj, id, iova);
336 mutex_unlock(&obj->dev->struct_mutex);
337 return ret;
338}
339
340/* get iova without taking a reference, used in places where you have
341 * already done a 'msm_gem_get_iova()'.
342 */
343uint32_t msm_gem_iova(struct drm_gem_object *obj, int id)
344{
345 struct msm_gem_object *msm_obj = to_msm_bo(obj);
346 WARN_ON(!msm_obj->domain[id].iova);
347 return msm_obj->domain[id].iova;
348}
349
350void msm_gem_put_iova(struct drm_gem_object *obj, int id)
351{
352 // XXX TODO ..
353 // NOTE: probably don't need a _locked() version.. we wouldn't
354 // normally unmap here, but instead just mark that it could be
355 // unmapped (if the iova refcnt drops to zero), but then later
356 // if another _get_iova_locked() fails we can start unmapping
357 // things that are no longer needed..
358}
359
360int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
361 struct drm_mode_create_dumb *args)
362{
363 args->pitch = align_pitch(args->width, args->bpp);
364 args->size = PAGE_ALIGN(args->pitch * args->height);
365 return msm_gem_new_handle(dev, file, args->size,
366 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle);
367}
368
369int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
370 uint32_t handle, uint64_t *offset)
371{
372 struct drm_gem_object *obj;
373 int ret = 0;
374
375 /* GEM does all our handle to object mapping */
376 obj = drm_gem_object_lookup(dev, file, handle);
377 if (obj == NULL) {
378 ret = -ENOENT;
379 goto fail;
380 }
381
382 *offset = msm_gem_mmap_offset(obj);
383
384 drm_gem_object_unreference_unlocked(obj);
385
386fail:
387 return ret;
388}
389
390void *msm_gem_vaddr_locked(struct drm_gem_object *obj)
391{
392 struct msm_gem_object *msm_obj = to_msm_bo(obj);
393 WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
394 if (!msm_obj->vaddr) {
395 struct page **pages = get_pages(obj);
396 if (IS_ERR(pages))
397 return ERR_CAST(pages);
398 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
399 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
400 }
401 return msm_obj->vaddr;
402}
403
404void *msm_gem_vaddr(struct drm_gem_object *obj)
405{
406 void *ret;
407 mutex_lock(&obj->dev->struct_mutex);
408 ret = msm_gem_vaddr_locked(obj);
409 mutex_unlock(&obj->dev->struct_mutex);
410 return ret;
411}
412
413/* setup callback for when bo is no longer busy..
414 * TODO probably want to differentiate read vs write..
415 */
416int msm_gem_queue_inactive_cb(struct drm_gem_object *obj,
417 struct msm_fence_cb *cb)
418{
419 struct msm_gem_object *msm_obj = to_msm_bo(obj);
420 uint32_t fence = msm_gem_fence(msm_obj,
421 MSM_PREP_READ | MSM_PREP_WRITE);
422 return msm_queue_fence_cb(obj->dev, cb, fence);
423}
424
425void msm_gem_move_to_active(struct drm_gem_object *obj,
426 struct msm_gpu *gpu, bool write, uint32_t fence)
427{
428 struct msm_gem_object *msm_obj = to_msm_bo(obj);
429 msm_obj->gpu = gpu;
430 if (write)
431 msm_obj->write_fence = fence;
432 else
433 msm_obj->read_fence = fence;
434 list_del_init(&msm_obj->mm_list);
435 list_add_tail(&msm_obj->mm_list, &gpu->active_list);
436}
437
438void msm_gem_move_to_inactive(struct drm_gem_object *obj)
439{
440 struct drm_device *dev = obj->dev;
441 struct msm_drm_private *priv = dev->dev_private;
442 struct msm_gem_object *msm_obj = to_msm_bo(obj);
443
444 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
445
446 msm_obj->gpu = NULL;
447 msm_obj->read_fence = 0;
448 msm_obj->write_fence = 0;
449 list_del_init(&msm_obj->mm_list);
450 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
451}
452
453int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
454{
455 struct drm_device *dev = obj->dev;
456 struct msm_gem_object *msm_obj = to_msm_bo(obj);
457 int ret = 0;
458
459 if (is_active(msm_obj)) {
460 uint32_t fence = msm_gem_fence(msm_obj, op);
461
462 if (op & MSM_PREP_NOSYNC)
463 timeout = NULL;
464
465 ret = msm_wait_fence(dev, fence, timeout, true);
466 }
467
468 /* TODO cache maintenance */
469
470 return ret;
471}
472
473int msm_gem_cpu_fini(struct drm_gem_object *obj)
474{
475 /* TODO cache maintenance */
476 return 0;
477}
478
479#ifdef CONFIG_DEBUG_FS
480void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
481{
482 struct drm_device *dev = obj->dev;
483 struct msm_gem_object *msm_obj = to_msm_bo(obj);
484 uint64_t off = drm_vma_node_start(&obj->vma_node);
485
486 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
487 seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %zu\n",
488 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
489 msm_obj->read_fence, msm_obj->write_fence,
490 obj->name, obj->refcount.refcount.counter,
491 off, msm_obj->vaddr, obj->size);
492}
493
494void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
495{
496 struct msm_gem_object *msm_obj;
497 int count = 0;
498 size_t size = 0;
499
500 list_for_each_entry(msm_obj, list, mm_list) {
501 struct drm_gem_object *obj = &msm_obj->base;
502 seq_printf(m, " ");
503 msm_gem_describe(obj, m);
504 count++;
505 size += obj->size;
506 }
507
508 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
509}
510#endif
511
512void msm_gem_free_object(struct drm_gem_object *obj)
513{
514 struct drm_device *dev = obj->dev;
515 struct msm_drm_private *priv = obj->dev->dev_private;
516 struct msm_gem_object *msm_obj = to_msm_bo(obj);
517 int id;
518
519 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
520
521 /* object should not be on active list: */
522 WARN_ON(is_active(msm_obj));
523
524 list_del(&msm_obj->mm_list);
525
526 for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) {
527 struct msm_mmu *mmu = priv->mmus[id];
528 if (mmu && msm_obj->domain[id].iova) {
529 uint32_t offset = msm_obj->domain[id].iova;
530 mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size);
531 }
532 }
533
534 if (obj->import_attach) {
535 if (msm_obj->vaddr)
536 dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr);
537
538 /* Don't drop the pages for imported dmabuf, as they are not
539 * ours, just free the array we allocated:
540 */
541 if (msm_obj->pages)
542 drm_free_large(msm_obj->pages);
543
544 drm_prime_gem_destroy(obj, msm_obj->sgt);
545 } else {
546 vunmap(msm_obj->vaddr);
547 put_pages(obj);
548 }
549
550 if (msm_obj->resv == &msm_obj->_resv)
551 reservation_object_fini(msm_obj->resv);
552
553 drm_gem_object_release(obj);
554
555 kfree(msm_obj);
556}
557
558/* convenience method to construct a GEM buffer object, and userspace handle */
559int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
560 uint32_t size, uint32_t flags, uint32_t *handle)
561{
562 struct drm_gem_object *obj;
563 int ret;
564
565 ret = mutex_lock_interruptible(&dev->struct_mutex);
566 if (ret)
567 return ret;
568
569 obj = msm_gem_new(dev, size, flags);
570
571 mutex_unlock(&dev->struct_mutex);
572
573 if (IS_ERR(obj))
574 return PTR_ERR(obj);
575
576 ret = drm_gem_handle_create(file, obj, handle);
577
578 /* drop reference from allocate - handle holds it now */
579 drm_gem_object_unreference_unlocked(obj);
580
581 return ret;
582}
583
584static int msm_gem_new_impl(struct drm_device *dev,
585 uint32_t size, uint32_t flags,
586 struct drm_gem_object **obj)
587{
588 struct msm_drm_private *priv = dev->dev_private;
589 struct msm_gem_object *msm_obj;
590 unsigned sz;
591 bool use_vram = false;
592
593 switch (flags & MSM_BO_CACHE_MASK) {
594 case MSM_BO_UNCACHED:
595 case MSM_BO_CACHED:
596 case MSM_BO_WC:
597 break;
598 default:
599 dev_err(dev->dev, "invalid cache flag: %x\n",
600 (flags & MSM_BO_CACHE_MASK));
601 return -EINVAL;
602 }
603
604 if (!iommu_present(&platform_bus_type))
605 use_vram = true;
606 else if ((flags & MSM_BO_STOLEN) && priv->vram.size)
607 use_vram = true;
608
609 if (WARN_ON(use_vram && !priv->vram.size))
610 return -EINVAL;
611
612 sz = sizeof(*msm_obj);
613 if (use_vram)
614 sz += sizeof(struct drm_mm_node);
615
616 msm_obj = kzalloc(sz, GFP_KERNEL);
617 if (!msm_obj)
618 return -ENOMEM;
619
620 if (use_vram)
621 msm_obj->vram_node = (void *)&msm_obj[1];
622
623 msm_obj->flags = flags;
624
625 msm_obj->resv = &msm_obj->_resv;
626 reservation_object_init(msm_obj->resv);
627
628 INIT_LIST_HEAD(&msm_obj->submit_entry);
629 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
630
631 *obj = &msm_obj->base;
632
633 return 0;
634}
635
636struct drm_gem_object *msm_gem_new(struct drm_device *dev,
637 uint32_t size, uint32_t flags)
638{
639 struct drm_gem_object *obj = NULL;
640 int ret;
641
642 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
643
644 size = PAGE_ALIGN(size);
645
646 ret = msm_gem_new_impl(dev, size, flags, &obj);
647 if (ret)
648 goto fail;
649
650 if (use_pages(obj)) {
651 ret = drm_gem_object_init(dev, obj, size);
652 if (ret)
653 goto fail;
654 } else {
655 drm_gem_private_object_init(dev, obj, size);
656 }
657
658 return obj;
659
660fail:
661 if (obj)
662 drm_gem_object_unreference(obj);
663
664 return ERR_PTR(ret);
665}
666
667struct drm_gem_object *msm_gem_import(struct drm_device *dev,
668 uint32_t size, struct sg_table *sgt)
669{
670 struct msm_gem_object *msm_obj;
671 struct drm_gem_object *obj;
672 int ret, npages;
673
674 /* if we don't have IOMMU, don't bother pretending we can import: */
675 if (!iommu_present(&platform_bus_type)) {
676 dev_err(dev->dev, "cannot import without IOMMU\n");
677 return ERR_PTR(-EINVAL);
678 }
679
680 size = PAGE_ALIGN(size);
681
682 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj);
683 if (ret)
684 goto fail;
685
686 drm_gem_private_object_init(dev, obj, size);
687
688 npages = size / PAGE_SIZE;
689
690 msm_obj = to_msm_bo(obj);
691 msm_obj->sgt = sgt;
692 msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *));
693 if (!msm_obj->pages) {
694 ret = -ENOMEM;
695 goto fail;
696 }
697
698 ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages);
699 if (ret)
700 goto fail;
701
702 return obj;
703
704fail:
705 if (obj)
706 drm_gem_object_unreference_unlocked(obj);
707
708 return ERR_PTR(ret);
709}
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}