Loading...
Note: File does not exist in v3.1.
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
4 * Author: Rob Clark <rob.clark@linaro.org>
5 */
6
7#include <linux/dma-mapping.h>
8#include <linux/seq_file.h>
9#include <linux/shmem_fs.h>
10#include <linux/spinlock.h>
11#include <linux/pfn_t.h>
12
13#include <drm/drm_prime.h>
14#include <drm/drm_vma_manager.h>
15
16#include "omap_drv.h"
17#include "omap_dmm_tiler.h"
18
19/*
20 * GEM buffer object implementation.
21 */
22
23/* note: we use upper 8 bits of flags for driver-internal flags: */
24#define OMAP_BO_MEM_DMA_API 0x01000000 /* memory allocated with the dma_alloc_* API */
25#define OMAP_BO_MEM_SHMEM 0x02000000 /* memory allocated through shmem backing */
26#define OMAP_BO_MEM_DMABUF 0x08000000 /* memory imported from a dmabuf */
27
28struct omap_gem_object {
29 struct drm_gem_object base;
30
31 struct list_head mm_list;
32
33 u32 flags;
34
35 /** width/height for tiled formats (rounded up to slot boundaries) */
36 u16 width, height;
37
38 /** roll applied when mapping to DMM */
39 u32 roll;
40
41 /** protects dma_addr_cnt, block, pages, dma_addrs and vaddr */
42 struct mutex lock;
43
44 /**
45 * dma_addr contains the buffer DMA address. It is valid for
46 *
47 * - buffers allocated through the DMA mapping API (with the
48 * OMAP_BO_MEM_DMA_API flag set)
49 *
50 * - buffers imported from dmabuf (with the OMAP_BO_MEM_DMABUF flag set)
51 * if they are physically contiguous (when sgt->orig_nents == 1)
52 *
53 * - buffers mapped through the TILER when dma_addr_cnt is not zero, in
54 * which case the DMA address points to the TILER aperture
55 *
56 * Physically contiguous buffers have their DMA address equal to the
57 * physical address as we don't remap those buffers through the TILER.
58 *
59 * Buffers mapped to the TILER have their DMA address pointing to the
60 * TILER aperture. As TILER mappings are refcounted (through
61 * dma_addr_cnt) the DMA address must be accessed through omap_gem_pin()
62 * to ensure that the mapping won't disappear unexpectedly. References
63 * must be released with omap_gem_unpin().
64 */
65 dma_addr_t dma_addr;
66
67 /**
68 * # of users of dma_addr
69 */
70 refcount_t dma_addr_cnt;
71
72 /**
73 * If the buffer has been imported from a dmabuf the OMAP_DB_DMABUF flag
74 * is set and the sgt field is valid.
75 */
76 struct sg_table *sgt;
77
78 /**
79 * tiler block used when buffer is remapped in DMM/TILER.
80 */
81 struct tiler_block *block;
82
83 /**
84 * Array of backing pages, if allocated. Note that pages are never
85 * allocated for buffers originally allocated from contiguous memory
86 */
87 struct page **pages;
88
89 /** addresses corresponding to pages in above array */
90 dma_addr_t *dma_addrs;
91
92 /**
93 * Virtual address, if mapped.
94 */
95 void *vaddr;
96};
97
98#define to_omap_bo(x) container_of(x, struct omap_gem_object, base)
99
100/* To deal with userspace mmap'ings of 2d tiled buffers, which (a) are
101 * not necessarily pinned in TILER all the time, and (b) when they are
102 * they are not necessarily page aligned, we reserve one or more small
103 * regions in each of the 2d containers to use as a user-GART where we
104 * can create a second page-aligned mapping of parts of the buffer
105 * being accessed from userspace.
106 *
107 * Note that we could optimize slightly when we know that multiple
108 * tiler containers are backed by the same PAT.. but I'll leave that
109 * for later..
110 */
111#define NUM_USERGART_ENTRIES 2
112struct omap_drm_usergart_entry {
113 struct tiler_block *block; /* the reserved tiler block */
114 dma_addr_t dma_addr;
115 struct drm_gem_object *obj; /* the current pinned obj */
116 pgoff_t obj_pgoff; /* page offset of obj currently
117 mapped in */
118};
119
120struct omap_drm_usergart {
121 struct omap_drm_usergart_entry entry[NUM_USERGART_ENTRIES];
122 int height; /* height in rows */
123 int height_shift; /* ilog2(height in rows) */
124 int slot_shift; /* ilog2(width per slot) */
125 int stride_pfn; /* stride in pages */
126 int last; /* index of last used entry */
127};
128
129/* -----------------------------------------------------------------------------
130 * Helpers
131 */
132
133/** get mmap offset */
134u64 omap_gem_mmap_offset(struct drm_gem_object *obj)
135{
136 struct drm_device *dev = obj->dev;
137 int ret;
138 size_t size;
139
140 /* Make it mmapable */
141 size = omap_gem_mmap_size(obj);
142 ret = drm_gem_create_mmap_offset_size(obj, size);
143 if (ret) {
144 dev_err(dev->dev, "could not allocate mmap offset\n");
145 return 0;
146 }
147
148 return drm_vma_node_offset_addr(&obj->vma_node);
149}
150
151static bool omap_gem_is_contiguous(struct omap_gem_object *omap_obj)
152{
153 if (omap_obj->flags & OMAP_BO_MEM_DMA_API)
154 return true;
155
156 if ((omap_obj->flags & OMAP_BO_MEM_DMABUF) && omap_obj->sgt->nents == 1)
157 return true;
158
159 return false;
160}
161
162/* -----------------------------------------------------------------------------
163 * Eviction
164 */
165
166static void omap_gem_evict_entry(struct drm_gem_object *obj,
167 enum tiler_fmt fmt, struct omap_drm_usergart_entry *entry)
168{
169 struct omap_gem_object *omap_obj = to_omap_bo(obj);
170 struct omap_drm_private *priv = obj->dev->dev_private;
171 int n = priv->usergart[fmt].height;
172 size_t size = PAGE_SIZE * n;
173 loff_t off = omap_gem_mmap_offset(obj) +
174 (entry->obj_pgoff << PAGE_SHIFT);
175 const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE);
176
177 if (m > 1) {
178 int i;
179 /* if stride > than PAGE_SIZE then sparse mapping: */
180 for (i = n; i > 0; i--) {
181 unmap_mapping_range(obj->dev->anon_inode->i_mapping,
182 off, PAGE_SIZE, 1);
183 off += PAGE_SIZE * m;
184 }
185 } else {
186 unmap_mapping_range(obj->dev->anon_inode->i_mapping,
187 off, size, 1);
188 }
189
190 entry->obj = NULL;
191}
192
193/* Evict a buffer from usergart, if it is mapped there */
194static void omap_gem_evict(struct drm_gem_object *obj)
195{
196 struct omap_gem_object *omap_obj = to_omap_bo(obj);
197 struct omap_drm_private *priv = obj->dev->dev_private;
198
199 if (omap_obj->flags & OMAP_BO_TILED_MASK) {
200 enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
201 int i;
202
203 for (i = 0; i < NUM_USERGART_ENTRIES; i++) {
204 struct omap_drm_usergart_entry *entry =
205 &priv->usergart[fmt].entry[i];
206
207 if (entry->obj == obj)
208 omap_gem_evict_entry(obj, fmt, entry);
209 }
210 }
211}
212
213/* -----------------------------------------------------------------------------
214 * Page Management
215 */
216
217/*
218 * Ensure backing pages are allocated. Must be called with the omap_obj.lock
219 * held.
220 */
221static int omap_gem_attach_pages(struct drm_gem_object *obj)
222{
223 struct drm_device *dev = obj->dev;
224 struct omap_gem_object *omap_obj = to_omap_bo(obj);
225 struct page **pages;
226 int npages = obj->size >> PAGE_SHIFT;
227 int i, ret;
228 dma_addr_t *addrs;
229
230 lockdep_assert_held(&omap_obj->lock);
231
232 /*
233 * If not using shmem (in which case backing pages don't need to be
234 * allocated) or if pages are already allocated we're done.
235 */
236 if (!(omap_obj->flags & OMAP_BO_MEM_SHMEM) || omap_obj->pages)
237 return 0;
238
239 pages = drm_gem_get_pages(obj);
240 if (IS_ERR(pages)) {
241 dev_err(obj->dev->dev, "could not get pages: %ld\n", PTR_ERR(pages));
242 return PTR_ERR(pages);
243 }
244
245 /* for non-cached buffers, ensure the new pages are clean because
246 * DSS, GPU, etc. are not cache coherent:
247 */
248 if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) {
249 addrs = kmalloc_array(npages, sizeof(*addrs), GFP_KERNEL);
250 if (!addrs) {
251 ret = -ENOMEM;
252 goto free_pages;
253 }
254
255 for (i = 0; i < npages; i++) {
256 addrs[i] = dma_map_page(dev->dev, pages[i],
257 0, PAGE_SIZE, DMA_TO_DEVICE);
258
259 if (dma_mapping_error(dev->dev, addrs[i])) {
260 dev_warn(dev->dev,
261 "%s: failed to map page\n", __func__);
262
263 for (i = i - 1; i >= 0; --i) {
264 dma_unmap_page(dev->dev, addrs[i],
265 PAGE_SIZE, DMA_TO_DEVICE);
266 }
267
268 ret = -ENOMEM;
269 goto free_addrs;
270 }
271 }
272 } else {
273 addrs = kcalloc(npages, sizeof(*addrs), GFP_KERNEL);
274 if (!addrs) {
275 ret = -ENOMEM;
276 goto free_pages;
277 }
278 }
279
280 omap_obj->dma_addrs = addrs;
281 omap_obj->pages = pages;
282
283 return 0;
284
285free_addrs:
286 kfree(addrs);
287free_pages:
288 drm_gem_put_pages(obj, pages, true, false);
289
290 return ret;
291}
292
293/* Release backing pages. Must be called with the omap_obj.lock held. */
294static void omap_gem_detach_pages(struct drm_gem_object *obj)
295{
296 struct omap_gem_object *omap_obj = to_omap_bo(obj);
297 unsigned int npages = obj->size >> PAGE_SHIFT;
298 unsigned int i;
299
300 lockdep_assert_held(&omap_obj->lock);
301
302 for (i = 0; i < npages; i++) {
303 if (omap_obj->dma_addrs[i])
304 dma_unmap_page(obj->dev->dev, omap_obj->dma_addrs[i],
305 PAGE_SIZE, DMA_TO_DEVICE);
306 }
307
308 kfree(omap_obj->dma_addrs);
309 omap_obj->dma_addrs = NULL;
310
311 drm_gem_put_pages(obj, omap_obj->pages, true, false);
312 omap_obj->pages = NULL;
313}
314
315/* get buffer flags */
316u32 omap_gem_flags(struct drm_gem_object *obj)
317{
318 return to_omap_bo(obj)->flags;
319}
320
321/** get mmap size */
322size_t omap_gem_mmap_size(struct drm_gem_object *obj)
323{
324 struct omap_gem_object *omap_obj = to_omap_bo(obj);
325 size_t size = obj->size;
326
327 if (omap_obj->flags & OMAP_BO_TILED_MASK) {
328 /* for tiled buffers, the virtual size has stride rounded up
329 * to 4kb.. (to hide the fact that row n+1 might start 16kb or
330 * 32kb later!). But we don't back the entire buffer with
331 * pages, only the valid picture part.. so need to adjust for
332 * this in the size used to mmap and generate mmap offset
333 */
334 size = tiler_vsize(gem2fmt(omap_obj->flags),
335 omap_obj->width, omap_obj->height);
336 }
337
338 return size;
339}
340
341/* -----------------------------------------------------------------------------
342 * Fault Handling
343 */
344
345/* Normal handling for the case of faulting in non-tiled buffers */
346static vm_fault_t omap_gem_fault_1d(struct drm_gem_object *obj,
347 struct vm_area_struct *vma, struct vm_fault *vmf)
348{
349 struct omap_gem_object *omap_obj = to_omap_bo(obj);
350 unsigned long pfn;
351 pgoff_t pgoff;
352
353 /* We don't use vmf->pgoff since that has the fake offset: */
354 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
355
356 if (omap_obj->pages) {
357 omap_gem_cpu_sync_page(obj, pgoff);
358 pfn = page_to_pfn(omap_obj->pages[pgoff]);
359 } else {
360 BUG_ON(!omap_gem_is_contiguous(omap_obj));
361 pfn = (omap_obj->dma_addr >> PAGE_SHIFT) + pgoff;
362 }
363
364 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
365 pfn, pfn << PAGE_SHIFT);
366
367 return vmf_insert_mixed(vma, vmf->address,
368 __pfn_to_pfn_t(pfn, PFN_DEV));
369}
370
371/* Special handling for the case of faulting in 2d tiled buffers */
372static vm_fault_t omap_gem_fault_2d(struct drm_gem_object *obj,
373 struct vm_area_struct *vma, struct vm_fault *vmf)
374{
375 struct omap_gem_object *omap_obj = to_omap_bo(obj);
376 struct omap_drm_private *priv = obj->dev->dev_private;
377 struct omap_drm_usergart_entry *entry;
378 enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
379 struct page *pages[64]; /* XXX is this too much to have on stack? */
380 unsigned long pfn;
381 pgoff_t pgoff, base_pgoff;
382 unsigned long vaddr;
383 int i, err, slots;
384 vm_fault_t ret = VM_FAULT_NOPAGE;
385
386 /*
387 * Note the height of the slot is also equal to the number of pages
388 * that need to be mapped in to fill 4kb wide CPU page. If the slot
389 * height is 64, then 64 pages fill a 4kb wide by 64 row region.
390 */
391 const int n = priv->usergart[fmt].height;
392 const int n_shift = priv->usergart[fmt].height_shift;
393
394 /*
395 * If buffer width in bytes > PAGE_SIZE then the virtual stride is
396 * rounded up to next multiple of PAGE_SIZE.. this need to be taken
397 * into account in some of the math, so figure out virtual stride
398 * in pages
399 */
400 const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE);
401
402 /* We don't use vmf->pgoff since that has the fake offset: */
403 pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
404
405 /*
406 * Actual address we start mapping at is rounded down to previous slot
407 * boundary in the y direction:
408 */
409 base_pgoff = round_down(pgoff, m << n_shift);
410
411 /* figure out buffer width in slots */
412 slots = omap_obj->width >> priv->usergart[fmt].slot_shift;
413
414 vaddr = vmf->address - ((pgoff - base_pgoff) << PAGE_SHIFT);
415
416 entry = &priv->usergart[fmt].entry[priv->usergart[fmt].last];
417
418 /* evict previous buffer using this usergart entry, if any: */
419 if (entry->obj)
420 omap_gem_evict_entry(entry->obj, fmt, entry);
421
422 entry->obj = obj;
423 entry->obj_pgoff = base_pgoff;
424
425 /* now convert base_pgoff to phys offset from virt offset: */
426 base_pgoff = (base_pgoff >> n_shift) * slots;
427
428 /* for wider-than 4k.. figure out which part of the slot-row we want: */
429 if (m > 1) {
430 int off = pgoff % m;
431 entry->obj_pgoff += off;
432 base_pgoff /= m;
433 slots = min(slots - (off << n_shift), n);
434 base_pgoff += off << n_shift;
435 vaddr += off << PAGE_SHIFT;
436 }
437
438 /*
439 * Map in pages. Beyond the valid pixel part of the buffer, we set
440 * pages[i] to NULL to get a dummy page mapped in.. if someone
441 * reads/writes it they will get random/undefined content, but at
442 * least it won't be corrupting whatever other random page used to
443 * be mapped in, or other undefined behavior.
444 */
445 memcpy(pages, &omap_obj->pages[base_pgoff],
446 sizeof(struct page *) * slots);
447 memset(pages + slots, 0,
448 sizeof(struct page *) * (n - slots));
449
450 err = tiler_pin(entry->block, pages, ARRAY_SIZE(pages), 0, true);
451 if (err) {
452 ret = vmf_error(err);
453 dev_err(obj->dev->dev, "failed to pin: %d\n", err);
454 return ret;
455 }
456
457 pfn = entry->dma_addr >> PAGE_SHIFT;
458
459 VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
460 pfn, pfn << PAGE_SHIFT);
461
462 for (i = n; i > 0; i--) {
463 ret = vmf_insert_mixed(vma,
464 vaddr, __pfn_to_pfn_t(pfn, PFN_DEV));
465 if (ret & VM_FAULT_ERROR)
466 break;
467 pfn += priv->usergart[fmt].stride_pfn;
468 vaddr += PAGE_SIZE * m;
469 }
470
471 /* simple round-robin: */
472 priv->usergart[fmt].last = (priv->usergart[fmt].last + 1)
473 % NUM_USERGART_ENTRIES;
474
475 return ret;
476}
477
478/**
479 * omap_gem_fault - pagefault handler for GEM objects
480 * @vmf: fault detail
481 *
482 * Invoked when a fault occurs on an mmap of a GEM managed area. GEM
483 * does most of the work for us including the actual map/unmap calls
484 * but we need to do the actual page work.
485 *
486 * The VMA was set up by GEM. In doing so it also ensured that the
487 * vma->vm_private_data points to the GEM object that is backing this
488 * mapping.
489 */
490static vm_fault_t omap_gem_fault(struct vm_fault *vmf)
491{
492 struct vm_area_struct *vma = vmf->vma;
493 struct drm_gem_object *obj = vma->vm_private_data;
494 struct omap_gem_object *omap_obj = to_omap_bo(obj);
495 int err;
496 vm_fault_t ret;
497
498 /* Make sure we don't parallel update on a fault, nor move or remove
499 * something from beneath our feet
500 */
501 mutex_lock(&omap_obj->lock);
502
503 /* if a shmem backed object, make sure we have pages attached now */
504 err = omap_gem_attach_pages(obj);
505 if (err) {
506 ret = vmf_error(err);
507 goto fail;
508 }
509
510 /* where should we do corresponding put_pages().. we are mapping
511 * the original page, rather than thru a GART, so we can't rely
512 * on eviction to trigger this. But munmap() or all mappings should
513 * probably trigger put_pages()?
514 */
515
516 if (omap_obj->flags & OMAP_BO_TILED_MASK)
517 ret = omap_gem_fault_2d(obj, vma, vmf);
518 else
519 ret = omap_gem_fault_1d(obj, vma, vmf);
520
521
522fail:
523 mutex_unlock(&omap_obj->lock);
524 return ret;
525}
526
527/** We override mainly to fix up some of the vm mapping flags.. */
528int omap_gem_mmap(struct file *filp, struct vm_area_struct *vma)
529{
530 int ret;
531
532 ret = drm_gem_mmap(filp, vma);
533 if (ret) {
534 DBG("mmap failed: %d", ret);
535 return ret;
536 }
537
538 return omap_gem_mmap_obj(vma->vm_private_data, vma);
539}
540
541int omap_gem_mmap_obj(struct drm_gem_object *obj,
542 struct vm_area_struct *vma)
543{
544 struct omap_gem_object *omap_obj = to_omap_bo(obj);
545
546 vma->vm_flags &= ~VM_PFNMAP;
547 vma->vm_flags |= VM_MIXEDMAP;
548
549 if (omap_obj->flags & OMAP_BO_WC) {
550 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
551 } else if (omap_obj->flags & OMAP_BO_UNCACHED) {
552 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
553 } else {
554 /*
555 * We do have some private objects, at least for scanout buffers
556 * on hardware without DMM/TILER. But these are allocated write-
557 * combine
558 */
559 if (WARN_ON(!obj->filp))
560 return -EINVAL;
561
562 /*
563 * Shunt off cached objs to shmem file so they have their own
564 * address_space (so unmap_mapping_range does what we want,
565 * in particular in the case of mmap'd dmabufs)
566 */
567 vma->vm_pgoff = 0;
568 vma_set_file(vma, obj->filp);
569
570 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
571 }
572
573 return 0;
574}
575
576/* -----------------------------------------------------------------------------
577 * Dumb Buffers
578 */
579
580/**
581 * omap_gem_dumb_create - create a dumb buffer
582 * @file: our client file
583 * @dev: our device
584 * @args: the requested arguments copied from userspace
585 *
586 * Allocate a buffer suitable for use for a frame buffer of the
587 * form described by user space. Give userspace a handle by which
588 * to reference it.
589 */
590int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
591 struct drm_mode_create_dumb *args)
592{
593 union omap_gem_size gsize;
594
595 args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
596
597 args->size = PAGE_ALIGN(args->pitch * args->height);
598
599 gsize = (union omap_gem_size){
600 .bytes = args->size,
601 };
602
603 return omap_gem_new_handle(dev, file, gsize,
604 OMAP_BO_SCANOUT | OMAP_BO_WC, &args->handle);
605}
606
607/**
608 * omap_gem_dumb_map - buffer mapping for dumb interface
609 * @file: our drm client file
610 * @dev: drm device
611 * @handle: GEM handle to the object (from dumb_create)
612 * @offset: memory map offset placeholder
613 *
614 * Do the necessary setup to allow the mapping of the frame buffer
615 * into user memory. We don't have to do much here at the moment.
616 */
617int omap_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
618 u32 handle, u64 *offset)
619{
620 struct drm_gem_object *obj;
621 int ret = 0;
622
623 /* GEM does all our handle to object mapping */
624 obj = drm_gem_object_lookup(file, handle);
625 if (obj == NULL) {
626 ret = -ENOENT;
627 goto fail;
628 }
629
630 *offset = omap_gem_mmap_offset(obj);
631
632 drm_gem_object_put(obj);
633
634fail:
635 return ret;
636}
637
638#ifdef CONFIG_DRM_FBDEV_EMULATION
639/* Set scrolling position. This allows us to implement fast scrolling
640 * for console.
641 *
642 * Call only from non-atomic contexts.
643 */
644int omap_gem_roll(struct drm_gem_object *obj, u32 roll)
645{
646 struct omap_gem_object *omap_obj = to_omap_bo(obj);
647 u32 npages = obj->size >> PAGE_SHIFT;
648 int ret = 0;
649
650 if (roll > npages) {
651 dev_err(obj->dev->dev, "invalid roll: %d\n", roll);
652 return -EINVAL;
653 }
654
655 omap_obj->roll = roll;
656
657 mutex_lock(&omap_obj->lock);
658
659 /* if we aren't mapped yet, we don't need to do anything */
660 if (omap_obj->block) {
661 ret = omap_gem_attach_pages(obj);
662 if (ret)
663 goto fail;
664
665 ret = tiler_pin(omap_obj->block, omap_obj->pages, npages,
666 roll, true);
667 if (ret)
668 dev_err(obj->dev->dev, "could not repin: %d\n", ret);
669 }
670
671fail:
672 mutex_unlock(&omap_obj->lock);
673
674 return ret;
675}
676#endif
677
678/* -----------------------------------------------------------------------------
679 * Memory Management & DMA Sync
680 */
681
682/*
683 * shmem buffers that are mapped cached are not coherent.
684 *
685 * We keep track of dirty pages using page faulting to perform cache management.
686 * When a page is mapped to the CPU in read/write mode the device can't access
687 * it and omap_obj->dma_addrs[i] is NULL. When a page is mapped to the device
688 * the omap_obj->dma_addrs[i] is set to the DMA address, and the page is
689 * unmapped from the CPU.
690 */
691static inline bool omap_gem_is_cached_coherent(struct drm_gem_object *obj)
692{
693 struct omap_gem_object *omap_obj = to_omap_bo(obj);
694
695 return !((omap_obj->flags & OMAP_BO_MEM_SHMEM) &&
696 ((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED));
697}
698
699/* Sync the buffer for CPU access.. note pages should already be
700 * attached, ie. omap_gem_get_pages()
701 */
702void omap_gem_cpu_sync_page(struct drm_gem_object *obj, int pgoff)
703{
704 struct drm_device *dev = obj->dev;
705 struct omap_gem_object *omap_obj = to_omap_bo(obj);
706
707 if (omap_gem_is_cached_coherent(obj))
708 return;
709
710 if (omap_obj->dma_addrs[pgoff]) {
711 dma_unmap_page(dev->dev, omap_obj->dma_addrs[pgoff],
712 PAGE_SIZE, DMA_TO_DEVICE);
713 omap_obj->dma_addrs[pgoff] = 0;
714 }
715}
716
717/* sync the buffer for DMA access */
718void omap_gem_dma_sync_buffer(struct drm_gem_object *obj,
719 enum dma_data_direction dir)
720{
721 struct drm_device *dev = obj->dev;
722 struct omap_gem_object *omap_obj = to_omap_bo(obj);
723 int i, npages = obj->size >> PAGE_SHIFT;
724 struct page **pages = omap_obj->pages;
725 bool dirty = false;
726
727 if (omap_gem_is_cached_coherent(obj))
728 return;
729
730 for (i = 0; i < npages; i++) {
731 if (!omap_obj->dma_addrs[i]) {
732 dma_addr_t addr;
733
734 addr = dma_map_page(dev->dev, pages[i], 0,
735 PAGE_SIZE, dir);
736 if (dma_mapping_error(dev->dev, addr)) {
737 dev_warn(dev->dev, "%s: failed to map page\n",
738 __func__);
739 break;
740 }
741
742 dirty = true;
743 omap_obj->dma_addrs[i] = addr;
744 }
745 }
746
747 if (dirty) {
748 unmap_mapping_range(obj->filp->f_mapping, 0,
749 omap_gem_mmap_size(obj), 1);
750 }
751}
752
753/**
754 * omap_gem_pin() - Pin a GEM object in memory
755 * @obj: the GEM object
756 * @dma_addr: the DMA address
757 *
758 * Pin the given GEM object in memory and fill the dma_addr pointer with the
759 * object's DMA address. If the buffer is not physically contiguous it will be
760 * remapped through the TILER to provide a contiguous view.
761 *
762 * Pins are reference-counted, calling this function multiple times is allowed
763 * as long the corresponding omap_gem_unpin() calls are balanced.
764 *
765 * Return 0 on success or a negative error code otherwise.
766 */
767int omap_gem_pin(struct drm_gem_object *obj, dma_addr_t *dma_addr)
768{
769 struct omap_drm_private *priv = obj->dev->dev_private;
770 struct omap_gem_object *omap_obj = to_omap_bo(obj);
771 int ret = 0;
772
773 mutex_lock(&omap_obj->lock);
774
775 if (!omap_gem_is_contiguous(omap_obj) && priv->has_dmm) {
776 if (refcount_read(&omap_obj->dma_addr_cnt) == 0) {
777 u32 npages = obj->size >> PAGE_SHIFT;
778 enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
779 struct tiler_block *block;
780
781 BUG_ON(omap_obj->block);
782
783 refcount_set(&omap_obj->dma_addr_cnt, 1);
784
785 ret = omap_gem_attach_pages(obj);
786 if (ret)
787 goto fail;
788
789 if (omap_obj->flags & OMAP_BO_TILED_MASK) {
790 block = tiler_reserve_2d(fmt,
791 omap_obj->width,
792 omap_obj->height, 0);
793 } else {
794 block = tiler_reserve_1d(obj->size);
795 }
796
797 if (IS_ERR(block)) {
798 ret = PTR_ERR(block);
799 dev_err(obj->dev->dev,
800 "could not remap: %d (%d)\n", ret, fmt);
801 goto fail;
802 }
803
804 /* TODO: enable async refill.. */
805 ret = tiler_pin(block, omap_obj->pages, npages,
806 omap_obj->roll, true);
807 if (ret) {
808 tiler_release(block);
809 dev_err(obj->dev->dev,
810 "could not pin: %d\n", ret);
811 goto fail;
812 }
813
814 omap_obj->dma_addr = tiler_ssptr(block);
815 omap_obj->block = block;
816
817 DBG("got dma address: %pad", &omap_obj->dma_addr);
818 } else {
819 refcount_inc(&omap_obj->dma_addr_cnt);
820 }
821
822 if (dma_addr)
823 *dma_addr = omap_obj->dma_addr;
824 } else if (omap_gem_is_contiguous(omap_obj)) {
825 if (dma_addr)
826 *dma_addr = omap_obj->dma_addr;
827 } else {
828 ret = -EINVAL;
829 goto fail;
830 }
831
832fail:
833 mutex_unlock(&omap_obj->lock);
834
835 return ret;
836}
837
838/**
839 * omap_gem_unpin_locked() - Unpin a GEM object from memory
840 * @obj: the GEM object
841 *
842 * omap_gem_unpin() without locking.
843 */
844static void omap_gem_unpin_locked(struct drm_gem_object *obj)
845{
846 struct omap_drm_private *priv = obj->dev->dev_private;
847 struct omap_gem_object *omap_obj = to_omap_bo(obj);
848 int ret;
849
850 if (omap_gem_is_contiguous(omap_obj) || !priv->has_dmm)
851 return;
852
853 if (refcount_dec_and_test(&omap_obj->dma_addr_cnt)) {
854 ret = tiler_unpin(omap_obj->block);
855 if (ret) {
856 dev_err(obj->dev->dev,
857 "could not unpin pages: %d\n", ret);
858 }
859 ret = tiler_release(omap_obj->block);
860 if (ret) {
861 dev_err(obj->dev->dev,
862 "could not release unmap: %d\n", ret);
863 }
864 omap_obj->dma_addr = 0;
865 omap_obj->block = NULL;
866 }
867}
868
869/**
870 * omap_gem_unpin() - Unpin a GEM object from memory
871 * @obj: the GEM object
872 *
873 * Unpin the given GEM object previously pinned with omap_gem_pin(). Pins are
874 * reference-counted, the actual unpin will only be performed when the number
875 * of calls to this function matches the number of calls to omap_gem_pin().
876 */
877void omap_gem_unpin(struct drm_gem_object *obj)
878{
879 struct omap_gem_object *omap_obj = to_omap_bo(obj);
880
881 mutex_lock(&omap_obj->lock);
882 omap_gem_unpin_locked(obj);
883 mutex_unlock(&omap_obj->lock);
884}
885
886/* Get rotated scanout address (only valid if already pinned), at the
887 * specified orientation and x,y offset from top-left corner of buffer
888 * (only valid for tiled 2d buffers)
889 */
890int omap_gem_rotated_dma_addr(struct drm_gem_object *obj, u32 orient,
891 int x, int y, dma_addr_t *dma_addr)
892{
893 struct omap_gem_object *omap_obj = to_omap_bo(obj);
894 int ret = -EINVAL;
895
896 mutex_lock(&omap_obj->lock);
897
898 if ((refcount_read(&omap_obj->dma_addr_cnt) > 0) && omap_obj->block &&
899 (omap_obj->flags & OMAP_BO_TILED_MASK)) {
900 *dma_addr = tiler_tsptr(omap_obj->block, orient, x, y);
901 ret = 0;
902 }
903
904 mutex_unlock(&omap_obj->lock);
905
906 return ret;
907}
908
909/* Get tiler stride for the buffer (only valid for 2d tiled buffers) */
910int omap_gem_tiled_stride(struct drm_gem_object *obj, u32 orient)
911{
912 struct omap_gem_object *omap_obj = to_omap_bo(obj);
913 int ret = -EINVAL;
914 if (omap_obj->flags & OMAP_BO_TILED_MASK)
915 ret = tiler_stride(gem2fmt(omap_obj->flags), orient);
916 return ret;
917}
918
919/* if !remap, and we don't have pages backing, then fail, rather than
920 * increasing the pin count (which we don't really do yet anyways,
921 * because we don't support swapping pages back out). And 'remap'
922 * might not be quite the right name, but I wanted to keep it working
923 * similarly to omap_gem_pin(). Note though that mutex is not
924 * aquired if !remap (because this can be called in atomic ctxt),
925 * but probably omap_gem_unpin() should be changed to work in the
926 * same way. If !remap, a matching omap_gem_put_pages() call is not
927 * required (and should not be made).
928 */
929int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages,
930 bool remap)
931{
932 struct omap_gem_object *omap_obj = to_omap_bo(obj);
933 int ret = 0;
934
935 mutex_lock(&omap_obj->lock);
936
937 if (remap) {
938 ret = omap_gem_attach_pages(obj);
939 if (ret)
940 goto unlock;
941 }
942
943 if (!omap_obj->pages) {
944 ret = -ENOMEM;
945 goto unlock;
946 }
947
948 *pages = omap_obj->pages;
949
950unlock:
951 mutex_unlock(&omap_obj->lock);
952
953 return ret;
954}
955
956/* release pages when DMA no longer being performed */
957int omap_gem_put_pages(struct drm_gem_object *obj)
958{
959 /* do something here if we dynamically attach/detach pages.. at
960 * least they would no longer need to be pinned if everyone has
961 * released the pages..
962 */
963 return 0;
964}
965
966#ifdef CONFIG_DRM_FBDEV_EMULATION
967/*
968 * Get kernel virtual address for CPU access.. this more or less only
969 * exists for omap_fbdev.
970 */
971void *omap_gem_vaddr(struct drm_gem_object *obj)
972{
973 struct omap_gem_object *omap_obj = to_omap_bo(obj);
974 void *vaddr;
975 int ret;
976
977 mutex_lock(&omap_obj->lock);
978
979 if (!omap_obj->vaddr) {
980 ret = omap_gem_attach_pages(obj);
981 if (ret) {
982 vaddr = ERR_PTR(ret);
983 goto unlock;
984 }
985
986 omap_obj->vaddr = vmap(omap_obj->pages, obj->size >> PAGE_SHIFT,
987 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
988 }
989
990 vaddr = omap_obj->vaddr;
991
992unlock:
993 mutex_unlock(&omap_obj->lock);
994 return vaddr;
995}
996#endif
997
998/* -----------------------------------------------------------------------------
999 * Power Management
1000 */
1001
1002#ifdef CONFIG_PM
1003/* re-pin objects in DMM in resume path: */
1004int omap_gem_resume(struct drm_device *dev)
1005{
1006 struct omap_drm_private *priv = dev->dev_private;
1007 struct omap_gem_object *omap_obj;
1008 int ret = 0;
1009
1010 mutex_lock(&priv->list_lock);
1011 list_for_each_entry(omap_obj, &priv->obj_list, mm_list) {
1012 if (omap_obj->block) {
1013 struct drm_gem_object *obj = &omap_obj->base;
1014 u32 npages = obj->size >> PAGE_SHIFT;
1015
1016 WARN_ON(!omap_obj->pages); /* this can't happen */
1017 ret = tiler_pin(omap_obj->block,
1018 omap_obj->pages, npages,
1019 omap_obj->roll, true);
1020 if (ret) {
1021 dev_err(dev->dev, "could not repin: %d\n", ret);
1022 goto done;
1023 }
1024 }
1025 }
1026
1027done:
1028 mutex_unlock(&priv->list_lock);
1029 return ret;
1030}
1031#endif
1032
1033/* -----------------------------------------------------------------------------
1034 * DebugFS
1035 */
1036
1037#ifdef CONFIG_DEBUG_FS
1038void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
1039{
1040 struct omap_gem_object *omap_obj = to_omap_bo(obj);
1041 u64 off;
1042
1043 off = drm_vma_node_start(&obj->vma_node);
1044
1045 mutex_lock(&omap_obj->lock);
1046
1047 seq_printf(m, "%08x: %2d (%2d) %08llx %pad (%2d) %p %4d",
1048 omap_obj->flags, obj->name, kref_read(&obj->refcount),
1049 off, &omap_obj->dma_addr,
1050 refcount_read(&omap_obj->dma_addr_cnt),
1051 omap_obj->vaddr, omap_obj->roll);
1052
1053 if (omap_obj->flags & OMAP_BO_TILED_MASK) {
1054 seq_printf(m, " %dx%d", omap_obj->width, omap_obj->height);
1055 if (omap_obj->block) {
1056 struct tcm_area *area = &omap_obj->block->area;
1057 seq_printf(m, " (%dx%d, %dx%d)",
1058 area->p0.x, area->p0.y,
1059 area->p1.x, area->p1.y);
1060 }
1061 } else {
1062 seq_printf(m, " %zu", obj->size);
1063 }
1064
1065 mutex_unlock(&omap_obj->lock);
1066
1067 seq_printf(m, "\n");
1068}
1069
1070void omap_gem_describe_objects(struct list_head *list, struct seq_file *m)
1071{
1072 struct omap_gem_object *omap_obj;
1073 int count = 0;
1074 size_t size = 0;
1075
1076 list_for_each_entry(omap_obj, list, mm_list) {
1077 struct drm_gem_object *obj = &omap_obj->base;
1078 seq_printf(m, " ");
1079 omap_gem_describe(obj, m);
1080 count++;
1081 size += obj->size;
1082 }
1083
1084 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
1085}
1086#endif
1087
1088/* -----------------------------------------------------------------------------
1089 * Constructor & Destructor
1090 */
1091
1092static void omap_gem_free_object(struct drm_gem_object *obj)
1093{
1094 struct drm_device *dev = obj->dev;
1095 struct omap_drm_private *priv = dev->dev_private;
1096 struct omap_gem_object *omap_obj = to_omap_bo(obj);
1097
1098 omap_gem_evict(obj);
1099
1100 mutex_lock(&priv->list_lock);
1101 list_del(&omap_obj->mm_list);
1102 mutex_unlock(&priv->list_lock);
1103
1104 /*
1105 * We own the sole reference to the object at this point, but to keep
1106 * lockdep happy, we must still take the omap_obj_lock to call
1107 * omap_gem_detach_pages(). This should hardly make any difference as
1108 * there can't be any lock contention.
1109 */
1110 mutex_lock(&omap_obj->lock);
1111
1112 /* The object should not be pinned. */
1113 WARN_ON(refcount_read(&omap_obj->dma_addr_cnt) > 0);
1114
1115 if (omap_obj->pages) {
1116 if (omap_obj->flags & OMAP_BO_MEM_DMABUF)
1117 kfree(omap_obj->pages);
1118 else
1119 omap_gem_detach_pages(obj);
1120 }
1121
1122 if (omap_obj->flags & OMAP_BO_MEM_DMA_API) {
1123 dma_free_wc(dev->dev, obj->size, omap_obj->vaddr,
1124 omap_obj->dma_addr);
1125 } else if (omap_obj->vaddr) {
1126 vunmap(omap_obj->vaddr);
1127 } else if (obj->import_attach) {
1128 drm_prime_gem_destroy(obj, omap_obj->sgt);
1129 }
1130
1131 mutex_unlock(&omap_obj->lock);
1132
1133 drm_gem_object_release(obj);
1134
1135 mutex_destroy(&omap_obj->lock);
1136
1137 kfree(omap_obj);
1138}
1139
1140static bool omap_gem_validate_flags(struct drm_device *dev, u32 flags)
1141{
1142 struct omap_drm_private *priv = dev->dev_private;
1143
1144 switch (flags & OMAP_BO_CACHE_MASK) {
1145 case OMAP_BO_CACHED:
1146 case OMAP_BO_WC:
1147 case OMAP_BO_CACHE_MASK:
1148 break;
1149
1150 default:
1151 return false;
1152 }
1153
1154 if (flags & OMAP_BO_TILED_MASK) {
1155 if (!priv->usergart)
1156 return false;
1157
1158 switch (flags & OMAP_BO_TILED_MASK) {
1159 case OMAP_BO_TILED_8:
1160 case OMAP_BO_TILED_16:
1161 case OMAP_BO_TILED_32:
1162 break;
1163
1164 default:
1165 return false;
1166 }
1167 }
1168
1169 return true;
1170}
1171
1172static const struct vm_operations_struct omap_gem_vm_ops = {
1173 .fault = omap_gem_fault,
1174 .open = drm_gem_vm_open,
1175 .close = drm_gem_vm_close,
1176};
1177
1178static const struct drm_gem_object_funcs omap_gem_object_funcs = {
1179 .free = omap_gem_free_object,
1180 .export = omap_gem_prime_export,
1181 .vm_ops = &omap_gem_vm_ops,
1182};
1183
1184/* GEM buffer object constructor */
1185struct drm_gem_object *omap_gem_new(struct drm_device *dev,
1186 union omap_gem_size gsize, u32 flags)
1187{
1188 struct omap_drm_private *priv = dev->dev_private;
1189 struct omap_gem_object *omap_obj;
1190 struct drm_gem_object *obj;
1191 struct address_space *mapping;
1192 size_t size;
1193 int ret;
1194
1195 if (!omap_gem_validate_flags(dev, flags))
1196 return NULL;
1197
1198 /* Validate the flags and compute the memory and cache flags. */
1199 if (flags & OMAP_BO_TILED_MASK) {
1200 /*
1201 * Tiled buffers are always shmem paged backed. When they are
1202 * scanned out, they are remapped into DMM/TILER.
1203 */
1204 flags |= OMAP_BO_MEM_SHMEM;
1205
1206 /*
1207 * Currently don't allow cached buffers. There is some caching
1208 * stuff that needs to be handled better.
1209 */
1210 flags &= ~(OMAP_BO_CACHED|OMAP_BO_WC|OMAP_BO_UNCACHED);
1211 flags |= tiler_get_cpu_cache_flags();
1212 } else if ((flags & OMAP_BO_SCANOUT) && !priv->has_dmm) {
1213 /*
1214 * If we don't have DMM, we must allocate scanout buffers
1215 * from contiguous DMA memory.
1216 */
1217 flags |= OMAP_BO_MEM_DMA_API;
1218 } else if (!(flags & OMAP_BO_MEM_DMABUF)) {
1219 /*
1220 * All other buffers not backed by dma_buf are shmem-backed.
1221 */
1222 flags |= OMAP_BO_MEM_SHMEM;
1223 }
1224
1225 /* Allocate the initialize the OMAP GEM object. */
1226 omap_obj = kzalloc(sizeof(*omap_obj), GFP_KERNEL);
1227 if (!omap_obj)
1228 return NULL;
1229
1230 obj = &omap_obj->base;
1231 omap_obj->flags = flags;
1232 mutex_init(&omap_obj->lock);
1233
1234 if (flags & OMAP_BO_TILED_MASK) {
1235 /*
1236 * For tiled buffers align dimensions to slot boundaries and
1237 * calculate size based on aligned dimensions.
1238 */
1239 tiler_align(gem2fmt(flags), &gsize.tiled.width,
1240 &gsize.tiled.height);
1241
1242 size = tiler_size(gem2fmt(flags), gsize.tiled.width,
1243 gsize.tiled.height);
1244
1245 omap_obj->width = gsize.tiled.width;
1246 omap_obj->height = gsize.tiled.height;
1247 } else {
1248 size = PAGE_ALIGN(gsize.bytes);
1249 }
1250
1251 obj->funcs = &omap_gem_object_funcs;
1252
1253 /* Initialize the GEM object. */
1254 if (!(flags & OMAP_BO_MEM_SHMEM)) {
1255 drm_gem_private_object_init(dev, obj, size);
1256 } else {
1257 ret = drm_gem_object_init(dev, obj, size);
1258 if (ret)
1259 goto err_free;
1260
1261 mapping = obj->filp->f_mapping;
1262 mapping_set_gfp_mask(mapping, GFP_USER | __GFP_DMA32);
1263 }
1264
1265 /* Allocate memory if needed. */
1266 if (flags & OMAP_BO_MEM_DMA_API) {
1267 omap_obj->vaddr = dma_alloc_wc(dev->dev, size,
1268 &omap_obj->dma_addr,
1269 GFP_KERNEL);
1270 if (!omap_obj->vaddr)
1271 goto err_release;
1272 }
1273
1274 mutex_lock(&priv->list_lock);
1275 list_add(&omap_obj->mm_list, &priv->obj_list);
1276 mutex_unlock(&priv->list_lock);
1277
1278 return obj;
1279
1280err_release:
1281 drm_gem_object_release(obj);
1282err_free:
1283 kfree(omap_obj);
1284 return NULL;
1285}
1286
1287struct drm_gem_object *omap_gem_new_dmabuf(struct drm_device *dev, size_t size,
1288 struct sg_table *sgt)
1289{
1290 struct omap_drm_private *priv = dev->dev_private;
1291 struct omap_gem_object *omap_obj;
1292 struct drm_gem_object *obj;
1293 union omap_gem_size gsize;
1294
1295 /* Without a DMM only physically contiguous buffers can be supported. */
1296 if (sgt->orig_nents != 1 && !priv->has_dmm)
1297 return ERR_PTR(-EINVAL);
1298
1299 gsize.bytes = PAGE_ALIGN(size);
1300 obj = omap_gem_new(dev, gsize, OMAP_BO_MEM_DMABUF | OMAP_BO_WC);
1301 if (!obj)
1302 return ERR_PTR(-ENOMEM);
1303
1304 omap_obj = to_omap_bo(obj);
1305
1306 mutex_lock(&omap_obj->lock);
1307
1308 omap_obj->sgt = sgt;
1309
1310 if (sgt->orig_nents == 1) {
1311 omap_obj->dma_addr = sg_dma_address(sgt->sgl);
1312 } else {
1313 /* Create pages list from sgt */
1314 struct page **pages;
1315 unsigned int npages;
1316 unsigned int ret;
1317
1318 npages = DIV_ROUND_UP(size, PAGE_SIZE);
1319 pages = kcalloc(npages, sizeof(*pages), GFP_KERNEL);
1320 if (!pages) {
1321 omap_gem_free_object(obj);
1322 obj = ERR_PTR(-ENOMEM);
1323 goto done;
1324 }
1325
1326 omap_obj->pages = pages;
1327 ret = drm_prime_sg_to_page_array(sgt, pages, npages);
1328 if (ret) {
1329 omap_gem_free_object(obj);
1330 obj = ERR_PTR(-ENOMEM);
1331 goto done;
1332 }
1333 }
1334
1335done:
1336 mutex_unlock(&omap_obj->lock);
1337 return obj;
1338}
1339
1340/* convenience method to construct a GEM buffer object, and userspace handle */
1341int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file,
1342 union omap_gem_size gsize, u32 flags, u32 *handle)
1343{
1344 struct drm_gem_object *obj;
1345 int ret;
1346
1347 obj = omap_gem_new(dev, gsize, flags);
1348 if (!obj)
1349 return -ENOMEM;
1350
1351 ret = drm_gem_handle_create(file, obj, handle);
1352 if (ret) {
1353 omap_gem_free_object(obj);
1354 return ret;
1355 }
1356
1357 /* drop reference from allocate - handle holds it now */
1358 drm_gem_object_put(obj);
1359
1360 return 0;
1361}
1362
1363/* -----------------------------------------------------------------------------
1364 * Init & Cleanup
1365 */
1366
1367/* If DMM is used, we need to set some stuff up.. */
1368void omap_gem_init(struct drm_device *dev)
1369{
1370 struct omap_drm_private *priv = dev->dev_private;
1371 struct omap_drm_usergart *usergart;
1372 const enum tiler_fmt fmts[] = {
1373 TILFMT_8BIT, TILFMT_16BIT, TILFMT_32BIT
1374 };
1375 int i, j;
1376
1377 if (!dmm_is_available()) {
1378 /* DMM only supported on OMAP4 and later, so this isn't fatal */
1379 dev_warn(dev->dev, "DMM not available, disable DMM support\n");
1380 return;
1381 }
1382
1383 usergart = kcalloc(3, sizeof(*usergart), GFP_KERNEL);
1384 if (!usergart)
1385 return;
1386
1387 /* reserve 4k aligned/wide regions for userspace mappings: */
1388 for (i = 0; i < ARRAY_SIZE(fmts); i++) {
1389 u16 h = 1, w = PAGE_SIZE >> i;
1390
1391 tiler_align(fmts[i], &w, &h);
1392 /* note: since each region is 1 4kb page wide, and minimum
1393 * number of rows, the height ends up being the same as the
1394 * # of pages in the region
1395 */
1396 usergart[i].height = h;
1397 usergart[i].height_shift = ilog2(h);
1398 usergart[i].stride_pfn = tiler_stride(fmts[i], 0) >> PAGE_SHIFT;
1399 usergart[i].slot_shift = ilog2((PAGE_SIZE / h) >> i);
1400 for (j = 0; j < NUM_USERGART_ENTRIES; j++) {
1401 struct omap_drm_usergart_entry *entry;
1402 struct tiler_block *block;
1403
1404 entry = &usergart[i].entry[j];
1405 block = tiler_reserve_2d(fmts[i], w, h, PAGE_SIZE);
1406 if (IS_ERR(block)) {
1407 dev_err(dev->dev,
1408 "reserve failed: %d, %d, %ld\n",
1409 i, j, PTR_ERR(block));
1410 return;
1411 }
1412 entry->dma_addr = tiler_ssptr(block);
1413 entry->block = block;
1414
1415 DBG("%d:%d: %dx%d: dma_addr=%pad stride=%d", i, j, w, h,
1416 &entry->dma_addr,
1417 usergart[i].stride_pfn << PAGE_SHIFT);
1418 }
1419 }
1420
1421 priv->usergart = usergart;
1422 priv->has_dmm = true;
1423}
1424
1425void omap_gem_deinit(struct drm_device *dev)
1426{
1427 struct omap_drm_private *priv = dev->dev_private;
1428
1429 /* I believe we can rely on there being no more outstanding GEM
1430 * objects which could depend on usergart/dmm at this point.
1431 */
1432 kfree(priv->usergart);
1433}