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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/*
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_fence.h"
25#include "msm_gem.h"
26#include "msm_gpu.h"
27#include "msm_mmu.h"
28
29static void msm_gem_vunmap_locked(struct drm_gem_object *obj);
30
31
32static dma_addr_t physaddr(struct drm_gem_object *obj)
33{
34 struct msm_gem_object *msm_obj = to_msm_bo(obj);
35 struct msm_drm_private *priv = obj->dev->dev_private;
36 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
37 priv->vram.paddr;
38}
39
40static bool use_pages(struct drm_gem_object *obj)
41{
42 struct msm_gem_object *msm_obj = to_msm_bo(obj);
43 return !msm_obj->vram_node;
44}
45
46/* allocate pages from VRAM carveout, used when no IOMMU: */
47static struct page **get_pages_vram(struct drm_gem_object *obj, int npages)
48{
49 struct msm_gem_object *msm_obj = to_msm_bo(obj);
50 struct msm_drm_private *priv = obj->dev->dev_private;
51 dma_addr_t paddr;
52 struct page **p;
53 int ret, i;
54
55 p = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
56 if (!p)
57 return ERR_PTR(-ENOMEM);
58
59 spin_lock(&priv->vram.lock);
60 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages);
61 spin_unlock(&priv->vram.lock);
62 if (ret) {
63 kvfree(p);
64 return ERR_PTR(ret);
65 }
66
67 paddr = physaddr(obj);
68 for (i = 0; i < npages; i++) {
69 p[i] = phys_to_page(paddr);
70 paddr += PAGE_SIZE;
71 }
72
73 return p;
74}
75
76static struct page **get_pages(struct drm_gem_object *obj)
77{
78 struct msm_gem_object *msm_obj = to_msm_bo(obj);
79
80 if (!msm_obj->pages) {
81 struct drm_device *dev = obj->dev;
82 struct page **p;
83 int npages = obj->size >> PAGE_SHIFT;
84
85 if (use_pages(obj))
86 p = drm_gem_get_pages(obj);
87 else
88 p = get_pages_vram(obj, npages);
89
90 if (IS_ERR(p)) {
91 dev_err(dev->dev, "could not get pages: %ld\n",
92 PTR_ERR(p));
93 return p;
94 }
95
96 msm_obj->pages = p;
97
98 msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
99 if (IS_ERR(msm_obj->sgt)) {
100 void *ptr = ERR_CAST(msm_obj->sgt);
101
102 dev_err(dev->dev, "failed to allocate sgt\n");
103 msm_obj->sgt = NULL;
104 return ptr;
105 }
106
107 /* For non-cached buffers, ensure the new pages are clean
108 * because display controller, GPU, etc. are not coherent:
109 */
110 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
111 dma_map_sg(dev->dev, msm_obj->sgt->sgl,
112 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
113 }
114
115 return msm_obj->pages;
116}
117
118static void put_pages_vram(struct drm_gem_object *obj)
119{
120 struct msm_gem_object *msm_obj = to_msm_bo(obj);
121 struct msm_drm_private *priv = obj->dev->dev_private;
122
123 spin_lock(&priv->vram.lock);
124 drm_mm_remove_node(msm_obj->vram_node);
125 spin_unlock(&priv->vram.lock);
126
127 kvfree(msm_obj->pages);
128}
129
130static void put_pages(struct drm_gem_object *obj)
131{
132 struct msm_gem_object *msm_obj = to_msm_bo(obj);
133
134 if (msm_obj->pages) {
135 if (msm_obj->sgt) {
136 /* For non-cached buffers, ensure the new
137 * pages are clean because display controller,
138 * GPU, etc. are not coherent:
139 */
140 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
141 dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
142 msm_obj->sgt->nents,
143 DMA_BIDIRECTIONAL);
144
145 sg_free_table(msm_obj->sgt);
146 kfree(msm_obj->sgt);
147 }
148
149 if (use_pages(obj))
150 drm_gem_put_pages(obj, msm_obj->pages, true, false);
151 else
152 put_pages_vram(obj);
153
154 msm_obj->pages = NULL;
155 }
156}
157
158struct page **msm_gem_get_pages(struct drm_gem_object *obj)
159{
160 struct msm_gem_object *msm_obj = to_msm_bo(obj);
161 struct page **p;
162
163 mutex_lock(&msm_obj->lock);
164
165 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
166 mutex_unlock(&msm_obj->lock);
167 return ERR_PTR(-EBUSY);
168 }
169
170 p = get_pages(obj);
171 mutex_unlock(&msm_obj->lock);
172 return p;
173}
174
175void msm_gem_put_pages(struct drm_gem_object *obj)
176{
177 /* when we start tracking the pin count, then do something here */
178}
179
180int msm_gem_mmap_obj(struct drm_gem_object *obj,
181 struct vm_area_struct *vma)
182{
183 struct msm_gem_object *msm_obj = to_msm_bo(obj);
184
185 vma->vm_flags &= ~VM_PFNMAP;
186 vma->vm_flags |= VM_MIXEDMAP;
187
188 if (msm_obj->flags & MSM_BO_WC) {
189 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
190 } else if (msm_obj->flags & MSM_BO_UNCACHED) {
191 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
192 } else {
193 /*
194 * Shunt off cached objs to shmem file so they have their own
195 * address_space (so unmap_mapping_range does what we want,
196 * in particular in the case of mmap'd dmabufs)
197 */
198 fput(vma->vm_file);
199 get_file(obj->filp);
200 vma->vm_pgoff = 0;
201 vma->vm_file = obj->filp;
202
203 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
204 }
205
206 return 0;
207}
208
209int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
210{
211 int ret;
212
213 ret = drm_gem_mmap(filp, vma);
214 if (ret) {
215 DBG("mmap failed: %d", ret);
216 return ret;
217 }
218
219 return msm_gem_mmap_obj(vma->vm_private_data, vma);
220}
221
222int msm_gem_fault(struct vm_fault *vmf)
223{
224 struct vm_area_struct *vma = vmf->vma;
225 struct drm_gem_object *obj = vma->vm_private_data;
226 struct msm_gem_object *msm_obj = to_msm_bo(obj);
227 struct page **pages;
228 unsigned long pfn;
229 pgoff_t pgoff;
230 int ret;
231
232 /*
233 * vm_ops.open/drm_gem_mmap_obj and close get and put
234 * a reference on obj. So, we dont need to hold one here.
235 */
236 ret = mutex_lock_interruptible(&msm_obj->lock);
237 if (ret)
238 goto out;
239
240 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
241 mutex_unlock(&msm_obj->lock);
242 return VM_FAULT_SIGBUS;
243 }
244
245 /* make sure we have pages attached now */
246 pages = get_pages(obj);
247 if (IS_ERR(pages)) {
248 ret = PTR_ERR(pages);
249 goto out_unlock;
250 }
251
252 /* We don't use vmf->pgoff since that has the fake offset: */
253 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
254
255 pfn = page_to_pfn(pages[pgoff]);
256
257 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
258 pfn, pfn << PAGE_SHIFT);
259
260 ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
261
262out_unlock:
263 mutex_unlock(&msm_obj->lock);
264out:
265 switch (ret) {
266 case -EAGAIN:
267 case 0:
268 case -ERESTARTSYS:
269 case -EINTR:
270 case -EBUSY:
271 /*
272 * EBUSY is ok: this just means that another thread
273 * already did the job.
274 */
275 return VM_FAULT_NOPAGE;
276 case -ENOMEM:
277 return VM_FAULT_OOM;
278 default:
279 return VM_FAULT_SIGBUS;
280 }
281}
282
283/** get mmap offset */
284static uint64_t mmap_offset(struct drm_gem_object *obj)
285{
286 struct drm_device *dev = obj->dev;
287 struct msm_gem_object *msm_obj = to_msm_bo(obj);
288 int ret;
289
290 WARN_ON(!mutex_is_locked(&msm_obj->lock));
291
292 /* Make it mmapable */
293 ret = drm_gem_create_mmap_offset(obj);
294
295 if (ret) {
296 dev_err(dev->dev, "could not allocate mmap offset\n");
297 return 0;
298 }
299
300 return drm_vma_node_offset_addr(&obj->vma_node);
301}
302
303uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
304{
305 uint64_t offset;
306 struct msm_gem_object *msm_obj = to_msm_bo(obj);
307
308 mutex_lock(&msm_obj->lock);
309 offset = mmap_offset(obj);
310 mutex_unlock(&msm_obj->lock);
311 return offset;
312}
313
314static struct msm_gem_vma *add_vma(struct drm_gem_object *obj,
315 struct msm_gem_address_space *aspace)
316{
317 struct msm_gem_object *msm_obj = to_msm_bo(obj);
318 struct msm_gem_vma *vma;
319
320 WARN_ON(!mutex_is_locked(&msm_obj->lock));
321
322 vma = kzalloc(sizeof(*vma), GFP_KERNEL);
323 if (!vma)
324 return ERR_PTR(-ENOMEM);
325
326 vma->aspace = aspace;
327
328 list_add_tail(&vma->list, &msm_obj->vmas);
329
330 return vma;
331}
332
333static struct msm_gem_vma *lookup_vma(struct drm_gem_object *obj,
334 struct msm_gem_address_space *aspace)
335{
336 struct msm_gem_object *msm_obj = to_msm_bo(obj);
337 struct msm_gem_vma *vma;
338
339 WARN_ON(!mutex_is_locked(&msm_obj->lock));
340
341 list_for_each_entry(vma, &msm_obj->vmas, list) {
342 if (vma->aspace == aspace)
343 return vma;
344 }
345
346 return NULL;
347}
348
349static void del_vma(struct msm_gem_vma *vma)
350{
351 if (!vma)
352 return;
353
354 list_del(&vma->list);
355 kfree(vma);
356}
357
358/* Called with msm_obj->lock locked */
359static void
360put_iova(struct drm_gem_object *obj)
361{
362 struct msm_gem_object *msm_obj = to_msm_bo(obj);
363 struct msm_gem_vma *vma, *tmp;
364
365 WARN_ON(!mutex_is_locked(&msm_obj->lock));
366
367 list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) {
368 msm_gem_unmap_vma(vma->aspace, vma, msm_obj->sgt);
369 del_vma(vma);
370 }
371}
372
373/* get iova, taking a reference. Should have a matching put */
374int msm_gem_get_iova(struct drm_gem_object *obj,
375 struct msm_gem_address_space *aspace, uint64_t *iova)
376{
377 struct msm_gem_object *msm_obj = to_msm_bo(obj);
378 struct msm_gem_vma *vma;
379 int ret = 0;
380
381 mutex_lock(&msm_obj->lock);
382
383 if (WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED)) {
384 mutex_unlock(&msm_obj->lock);
385 return -EBUSY;
386 }
387
388 vma = lookup_vma(obj, aspace);
389
390 if (!vma) {
391 struct page **pages;
392
393 vma = add_vma(obj, aspace);
394 if (IS_ERR(vma)) {
395 ret = PTR_ERR(vma);
396 goto unlock;
397 }
398
399 pages = get_pages(obj);
400 if (IS_ERR(pages)) {
401 ret = PTR_ERR(pages);
402 goto fail;
403 }
404
405 ret = msm_gem_map_vma(aspace, vma, msm_obj->sgt,
406 obj->size >> PAGE_SHIFT);
407 if (ret)
408 goto fail;
409 }
410
411 *iova = vma->iova;
412
413 mutex_unlock(&msm_obj->lock);
414 return 0;
415
416fail:
417 del_vma(vma);
418unlock:
419 mutex_unlock(&msm_obj->lock);
420 return ret;
421}
422
423/* get iova without taking a reference, used in places where you have
424 * already done a 'msm_gem_get_iova()'.
425 */
426uint64_t msm_gem_iova(struct drm_gem_object *obj,
427 struct msm_gem_address_space *aspace)
428{
429 struct msm_gem_object *msm_obj = to_msm_bo(obj);
430 struct msm_gem_vma *vma;
431
432 mutex_lock(&msm_obj->lock);
433 vma = lookup_vma(obj, aspace);
434 mutex_unlock(&msm_obj->lock);
435 WARN_ON(!vma);
436
437 return vma ? vma->iova : 0;
438}
439
440void msm_gem_put_iova(struct drm_gem_object *obj,
441 struct msm_gem_address_space *aspace)
442{
443 // XXX TODO ..
444 // NOTE: probably don't need a _locked() version.. we wouldn't
445 // normally unmap here, but instead just mark that it could be
446 // unmapped (if the iova refcnt drops to zero), but then later
447 // if another _get_iova_locked() fails we can start unmapping
448 // things that are no longer needed..
449}
450
451int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
452 struct drm_mode_create_dumb *args)
453{
454 args->pitch = align_pitch(args->width, args->bpp);
455 args->size = PAGE_ALIGN(args->pitch * args->height);
456 return msm_gem_new_handle(dev, file, args->size,
457 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle);
458}
459
460int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
461 uint32_t handle, uint64_t *offset)
462{
463 struct drm_gem_object *obj;
464 int ret = 0;
465
466 /* GEM does all our handle to object mapping */
467 obj = drm_gem_object_lookup(file, handle);
468 if (obj == NULL) {
469 ret = -ENOENT;
470 goto fail;
471 }
472
473 *offset = msm_gem_mmap_offset(obj);
474
475 drm_gem_object_put_unlocked(obj);
476
477fail:
478 return ret;
479}
480
481static void *get_vaddr(struct drm_gem_object *obj, unsigned madv)
482{
483 struct msm_gem_object *msm_obj = to_msm_bo(obj);
484 int ret = 0;
485
486 mutex_lock(&msm_obj->lock);
487
488 if (WARN_ON(msm_obj->madv > madv)) {
489 dev_err(obj->dev->dev, "Invalid madv state: %u vs %u\n",
490 msm_obj->madv, madv);
491 mutex_unlock(&msm_obj->lock);
492 return ERR_PTR(-EBUSY);
493 }
494
495 /* increment vmap_count *before* vmap() call, so shrinker can
496 * check vmap_count (is_vunmapable()) outside of msm_obj->lock.
497 * This guarantees that we won't try to msm_gem_vunmap() this
498 * same object from within the vmap() call (while we already
499 * hold msm_obj->lock)
500 */
501 msm_obj->vmap_count++;
502
503 if (!msm_obj->vaddr) {
504 struct page **pages = get_pages(obj);
505 if (IS_ERR(pages)) {
506 ret = PTR_ERR(pages);
507 goto fail;
508 }
509 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
510 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
511 if (msm_obj->vaddr == NULL) {
512 ret = -ENOMEM;
513 goto fail;
514 }
515 }
516
517 mutex_unlock(&msm_obj->lock);
518 return msm_obj->vaddr;
519
520fail:
521 msm_obj->vmap_count--;
522 mutex_unlock(&msm_obj->lock);
523 return ERR_PTR(ret);
524}
525
526void *msm_gem_get_vaddr(struct drm_gem_object *obj)
527{
528 return get_vaddr(obj, MSM_MADV_WILLNEED);
529}
530
531/*
532 * Don't use this! It is for the very special case of dumping
533 * submits from GPU hangs or faults, were the bo may already
534 * be MSM_MADV_DONTNEED, but we know the buffer is still on the
535 * active list.
536 */
537void *msm_gem_get_vaddr_active(struct drm_gem_object *obj)
538{
539 return get_vaddr(obj, __MSM_MADV_PURGED);
540}
541
542void msm_gem_put_vaddr(struct drm_gem_object *obj)
543{
544 struct msm_gem_object *msm_obj = to_msm_bo(obj);
545
546 mutex_lock(&msm_obj->lock);
547 WARN_ON(msm_obj->vmap_count < 1);
548 msm_obj->vmap_count--;
549 mutex_unlock(&msm_obj->lock);
550}
551
552/* Update madvise status, returns true if not purged, else
553 * false or -errno.
554 */
555int msm_gem_madvise(struct drm_gem_object *obj, unsigned madv)
556{
557 struct msm_gem_object *msm_obj = to_msm_bo(obj);
558
559 mutex_lock(&msm_obj->lock);
560
561 WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
562
563 if (msm_obj->madv != __MSM_MADV_PURGED)
564 msm_obj->madv = madv;
565
566 madv = msm_obj->madv;
567
568 mutex_unlock(&msm_obj->lock);
569
570 return (madv != __MSM_MADV_PURGED);
571}
572
573void msm_gem_purge(struct drm_gem_object *obj, enum msm_gem_lock subclass)
574{
575 struct drm_device *dev = obj->dev;
576 struct msm_gem_object *msm_obj = to_msm_bo(obj);
577
578 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
579 WARN_ON(!is_purgeable(msm_obj));
580 WARN_ON(obj->import_attach);
581
582 mutex_lock_nested(&msm_obj->lock, subclass);
583
584 put_iova(obj);
585
586 msm_gem_vunmap_locked(obj);
587
588 put_pages(obj);
589
590 msm_obj->madv = __MSM_MADV_PURGED;
591
592 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
593 drm_gem_free_mmap_offset(obj);
594
595 /* Our goal here is to return as much of the memory as
596 * is possible back to the system as we are called from OOM.
597 * To do this we must instruct the shmfs to drop all of its
598 * backing pages, *now*.
599 */
600 shmem_truncate_range(file_inode(obj->filp), 0, (loff_t)-1);
601
602 invalidate_mapping_pages(file_inode(obj->filp)->i_mapping,
603 0, (loff_t)-1);
604
605 mutex_unlock(&msm_obj->lock);
606}
607
608static void msm_gem_vunmap_locked(struct drm_gem_object *obj)
609{
610 struct msm_gem_object *msm_obj = to_msm_bo(obj);
611
612 WARN_ON(!mutex_is_locked(&msm_obj->lock));
613
614 if (!msm_obj->vaddr || WARN_ON(!is_vunmapable(msm_obj)))
615 return;
616
617 vunmap(msm_obj->vaddr);
618 msm_obj->vaddr = NULL;
619}
620
621void msm_gem_vunmap(struct drm_gem_object *obj, enum msm_gem_lock subclass)
622{
623 struct msm_gem_object *msm_obj = to_msm_bo(obj);
624
625 mutex_lock_nested(&msm_obj->lock, subclass);
626 msm_gem_vunmap_locked(obj);
627 mutex_unlock(&msm_obj->lock);
628}
629
630/* must be called before _move_to_active().. */
631int msm_gem_sync_object(struct drm_gem_object *obj,
632 struct msm_fence_context *fctx, bool exclusive)
633{
634 struct msm_gem_object *msm_obj = to_msm_bo(obj);
635 struct reservation_object_list *fobj;
636 struct dma_fence *fence;
637 int i, ret;
638
639 fobj = reservation_object_get_list(msm_obj->resv);
640 if (!fobj || (fobj->shared_count == 0)) {
641 fence = reservation_object_get_excl(msm_obj->resv);
642 /* don't need to wait on our own fences, since ring is fifo */
643 if (fence && (fence->context != fctx->context)) {
644 ret = dma_fence_wait(fence, true);
645 if (ret)
646 return ret;
647 }
648 }
649
650 if (!exclusive || !fobj)
651 return 0;
652
653 for (i = 0; i < fobj->shared_count; i++) {
654 fence = rcu_dereference_protected(fobj->shared[i],
655 reservation_object_held(msm_obj->resv));
656 if (fence->context != fctx->context) {
657 ret = dma_fence_wait(fence, true);
658 if (ret)
659 return ret;
660 }
661 }
662
663 return 0;
664}
665
666void msm_gem_move_to_active(struct drm_gem_object *obj,
667 struct msm_gpu *gpu, bool exclusive, struct dma_fence *fence)
668{
669 struct msm_gem_object *msm_obj = to_msm_bo(obj);
670 WARN_ON(msm_obj->madv != MSM_MADV_WILLNEED);
671 msm_obj->gpu = gpu;
672 if (exclusive)
673 reservation_object_add_excl_fence(msm_obj->resv, fence);
674 else
675 reservation_object_add_shared_fence(msm_obj->resv, fence);
676 list_del_init(&msm_obj->mm_list);
677 list_add_tail(&msm_obj->mm_list, &gpu->active_list);
678}
679
680void msm_gem_move_to_inactive(struct drm_gem_object *obj)
681{
682 struct drm_device *dev = obj->dev;
683 struct msm_drm_private *priv = dev->dev_private;
684 struct msm_gem_object *msm_obj = to_msm_bo(obj);
685
686 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
687
688 msm_obj->gpu = NULL;
689 list_del_init(&msm_obj->mm_list);
690 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
691}
692
693int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout)
694{
695 struct msm_gem_object *msm_obj = to_msm_bo(obj);
696 bool write = !!(op & MSM_PREP_WRITE);
697 unsigned long remain =
698 op & MSM_PREP_NOSYNC ? 0 : timeout_to_jiffies(timeout);
699 long ret;
700
701 ret = reservation_object_wait_timeout_rcu(msm_obj->resv, write,
702 true, remain);
703 if (ret == 0)
704 return remain == 0 ? -EBUSY : -ETIMEDOUT;
705 else if (ret < 0)
706 return ret;
707
708 /* TODO cache maintenance */
709
710 return 0;
711}
712
713int msm_gem_cpu_fini(struct drm_gem_object *obj)
714{
715 /* TODO cache maintenance */
716 return 0;
717}
718
719#ifdef CONFIG_DEBUG_FS
720static void describe_fence(struct dma_fence *fence, const char *type,
721 struct seq_file *m)
722{
723 if (!dma_fence_is_signaled(fence))
724 seq_printf(m, "\t%9s: %s %s seq %u\n", type,
725 fence->ops->get_driver_name(fence),
726 fence->ops->get_timeline_name(fence),
727 fence->seqno);
728}
729
730void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
731{
732 struct msm_gem_object *msm_obj = to_msm_bo(obj);
733 struct reservation_object *robj = msm_obj->resv;
734 struct reservation_object_list *fobj;
735 struct dma_fence *fence;
736 struct msm_gem_vma *vma;
737 uint64_t off = drm_vma_node_start(&obj->vma_node);
738 const char *madv;
739
740 mutex_lock(&msm_obj->lock);
741
742 switch (msm_obj->madv) {
743 case __MSM_MADV_PURGED:
744 madv = " purged";
745 break;
746 case MSM_MADV_DONTNEED:
747 madv = " purgeable";
748 break;
749 case MSM_MADV_WILLNEED:
750 default:
751 madv = "";
752 break;
753 }
754
755 seq_printf(m, "%08x: %c %2d (%2d) %08llx %p\t",
756 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
757 obj->name, kref_read(&obj->refcount),
758 off, msm_obj->vaddr);
759
760 /* FIXME: we need to print the address space here too */
761 list_for_each_entry(vma, &msm_obj->vmas, list)
762 seq_printf(m, " %08llx", vma->iova);
763
764 seq_printf(m, " %zu%s\n", obj->size, madv);
765
766 rcu_read_lock();
767 fobj = rcu_dereference(robj->fence);
768 if (fobj) {
769 unsigned int i, shared_count = fobj->shared_count;
770
771 for (i = 0; i < shared_count; i++) {
772 fence = rcu_dereference(fobj->shared[i]);
773 describe_fence(fence, "Shared", m);
774 }
775 }
776
777 fence = rcu_dereference(robj->fence_excl);
778 if (fence)
779 describe_fence(fence, "Exclusive", m);
780 rcu_read_unlock();
781
782 mutex_unlock(&msm_obj->lock);
783}
784
785void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
786{
787 struct msm_gem_object *msm_obj;
788 int count = 0;
789 size_t size = 0;
790
791 list_for_each_entry(msm_obj, list, mm_list) {
792 struct drm_gem_object *obj = &msm_obj->base;
793 seq_printf(m, " ");
794 msm_gem_describe(obj, m);
795 count++;
796 size += obj->size;
797 }
798
799 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
800}
801#endif
802
803/* don't call directly! Use drm_gem_object_put() and friends */
804void msm_gem_free_object(struct drm_gem_object *obj)
805{
806 struct drm_device *dev = obj->dev;
807 struct msm_gem_object *msm_obj = to_msm_bo(obj);
808
809 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
810
811 /* object should not be on active list: */
812 WARN_ON(is_active(msm_obj));
813
814 list_del(&msm_obj->mm_list);
815
816 mutex_lock(&msm_obj->lock);
817
818 put_iova(obj);
819
820 if (obj->import_attach) {
821 if (msm_obj->vaddr)
822 dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr);
823
824 /* Don't drop the pages for imported dmabuf, as they are not
825 * ours, just free the array we allocated:
826 */
827 if (msm_obj->pages)
828 kvfree(msm_obj->pages);
829
830 drm_prime_gem_destroy(obj, msm_obj->sgt);
831 } else {
832 msm_gem_vunmap_locked(obj);
833 put_pages(obj);
834 }
835
836 if (msm_obj->resv == &msm_obj->_resv)
837 reservation_object_fini(msm_obj->resv);
838
839 drm_gem_object_release(obj);
840
841 mutex_unlock(&msm_obj->lock);
842 kfree(msm_obj);
843}
844
845/* convenience method to construct a GEM buffer object, and userspace handle */
846int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
847 uint32_t size, uint32_t flags, uint32_t *handle)
848{
849 struct drm_gem_object *obj;
850 int ret;
851
852 obj = msm_gem_new(dev, size, flags);
853
854 if (IS_ERR(obj))
855 return PTR_ERR(obj);
856
857 ret = drm_gem_handle_create(file, obj, handle);
858
859 /* drop reference from allocate - handle holds it now */
860 drm_gem_object_put_unlocked(obj);
861
862 return ret;
863}
864
865static int msm_gem_new_impl(struct drm_device *dev,
866 uint32_t size, uint32_t flags,
867 struct reservation_object *resv,
868 struct drm_gem_object **obj,
869 bool struct_mutex_locked)
870{
871 struct msm_drm_private *priv = dev->dev_private;
872 struct msm_gem_object *msm_obj;
873
874 switch (flags & MSM_BO_CACHE_MASK) {
875 case MSM_BO_UNCACHED:
876 case MSM_BO_CACHED:
877 case MSM_BO_WC:
878 break;
879 default:
880 dev_err(dev->dev, "invalid cache flag: %x\n",
881 (flags & MSM_BO_CACHE_MASK));
882 return -EINVAL;
883 }
884
885 msm_obj = kzalloc(sizeof(*msm_obj), GFP_KERNEL);
886 if (!msm_obj)
887 return -ENOMEM;
888
889 mutex_init(&msm_obj->lock);
890
891 msm_obj->flags = flags;
892 msm_obj->madv = MSM_MADV_WILLNEED;
893
894 if (resv) {
895 msm_obj->resv = resv;
896 } else {
897 msm_obj->resv = &msm_obj->_resv;
898 reservation_object_init(msm_obj->resv);
899 }
900
901 INIT_LIST_HEAD(&msm_obj->submit_entry);
902 INIT_LIST_HEAD(&msm_obj->vmas);
903
904 if (struct_mutex_locked) {
905 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
906 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
907 } else {
908 mutex_lock(&dev->struct_mutex);
909 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
910 mutex_unlock(&dev->struct_mutex);
911 }
912
913 *obj = &msm_obj->base;
914
915 return 0;
916}
917
918static struct drm_gem_object *_msm_gem_new(struct drm_device *dev,
919 uint32_t size, uint32_t flags, bool struct_mutex_locked)
920{
921 struct msm_drm_private *priv = dev->dev_private;
922 struct drm_gem_object *obj = NULL;
923 bool use_vram = false;
924 int ret;
925
926 size = PAGE_ALIGN(size);
927
928 if (!iommu_present(&platform_bus_type))
929 use_vram = true;
930 else if ((flags & MSM_BO_STOLEN) && priv->vram.size)
931 use_vram = true;
932
933 if (WARN_ON(use_vram && !priv->vram.size))
934 return ERR_PTR(-EINVAL);
935
936 /* Disallow zero sized objects as they make the underlying
937 * infrastructure grumpy
938 */
939 if (size == 0)
940 return ERR_PTR(-EINVAL);
941
942 ret = msm_gem_new_impl(dev, size, flags, NULL, &obj, struct_mutex_locked);
943 if (ret)
944 goto fail;
945
946 if (use_vram) {
947 struct msm_gem_vma *vma;
948 struct page **pages;
949 struct msm_gem_object *msm_obj = to_msm_bo(obj);
950
951 mutex_lock(&msm_obj->lock);
952
953 vma = add_vma(obj, NULL);
954 mutex_unlock(&msm_obj->lock);
955 if (IS_ERR(vma)) {
956 ret = PTR_ERR(vma);
957 goto fail;
958 }
959
960 to_msm_bo(obj)->vram_node = &vma->node;
961
962 drm_gem_private_object_init(dev, obj, size);
963
964 pages = get_pages(obj);
965 if (IS_ERR(pages)) {
966 ret = PTR_ERR(pages);
967 goto fail;
968 }
969
970 vma->iova = physaddr(obj);
971 } else {
972 ret = drm_gem_object_init(dev, obj, size);
973 if (ret)
974 goto fail;
975 }
976
977 return obj;
978
979fail:
980 drm_gem_object_put_unlocked(obj);
981 return ERR_PTR(ret);
982}
983
984struct drm_gem_object *msm_gem_new_locked(struct drm_device *dev,
985 uint32_t size, uint32_t flags)
986{
987 return _msm_gem_new(dev, size, flags, true);
988}
989
990struct drm_gem_object *msm_gem_new(struct drm_device *dev,
991 uint32_t size, uint32_t flags)
992{
993 return _msm_gem_new(dev, size, flags, false);
994}
995
996struct drm_gem_object *msm_gem_import(struct drm_device *dev,
997 struct dma_buf *dmabuf, struct sg_table *sgt)
998{
999 struct msm_gem_object *msm_obj;
1000 struct drm_gem_object *obj;
1001 uint32_t size;
1002 int ret, npages;
1003
1004 /* if we don't have IOMMU, don't bother pretending we can import: */
1005 if (!iommu_present(&platform_bus_type)) {
1006 dev_err(dev->dev, "cannot import without IOMMU\n");
1007 return ERR_PTR(-EINVAL);
1008 }
1009
1010 size = PAGE_ALIGN(dmabuf->size);
1011
1012 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, dmabuf->resv, &obj, false);
1013 if (ret)
1014 goto fail;
1015
1016 drm_gem_private_object_init(dev, obj, size);
1017
1018 npages = size / PAGE_SIZE;
1019
1020 msm_obj = to_msm_bo(obj);
1021 mutex_lock(&msm_obj->lock);
1022 msm_obj->sgt = sgt;
1023 msm_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1024 if (!msm_obj->pages) {
1025 mutex_unlock(&msm_obj->lock);
1026 ret = -ENOMEM;
1027 goto fail;
1028 }
1029
1030 ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages);
1031 if (ret) {
1032 mutex_unlock(&msm_obj->lock);
1033 goto fail;
1034 }
1035
1036 mutex_unlock(&msm_obj->lock);
1037 return obj;
1038
1039fail:
1040 drm_gem_object_put_unlocked(obj);
1041 return ERR_PTR(ret);
1042}
1043
1044static void *_msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
1045 uint32_t flags, struct msm_gem_address_space *aspace,
1046 struct drm_gem_object **bo, uint64_t *iova, bool locked)
1047{
1048 void *vaddr;
1049 struct drm_gem_object *obj = _msm_gem_new(dev, size, flags, locked);
1050 int ret;
1051
1052 if (IS_ERR(obj))
1053 return ERR_CAST(obj);
1054
1055 if (iova) {
1056 ret = msm_gem_get_iova(obj, aspace, iova);
1057 if (ret) {
1058 drm_gem_object_put(obj);
1059 return ERR_PTR(ret);
1060 }
1061 }
1062
1063 vaddr = msm_gem_get_vaddr(obj);
1064 if (IS_ERR(vaddr)) {
1065 msm_gem_put_iova(obj, aspace);
1066 drm_gem_object_put(obj);
1067 return ERR_CAST(vaddr);
1068 }
1069
1070 if (bo)
1071 *bo = obj;
1072
1073 return vaddr;
1074}
1075
1076void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
1077 uint32_t flags, struct msm_gem_address_space *aspace,
1078 struct drm_gem_object **bo, uint64_t *iova)
1079{
1080 return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, false);
1081}
1082
1083void *msm_gem_kernel_new_locked(struct drm_device *dev, uint32_t size,
1084 uint32_t flags, struct msm_gem_address_space *aspace,
1085 struct drm_gem_object **bo, uint64_t *iova)
1086{
1087 return _msm_gem_kernel_new(dev, size, flags, aspace, bo, iova, true);
1088}