blob: d8d60c969ac7858bce0e6114f092a5f1aad450aa [file] [log] [blame]
Rob Clarkc8afe682013-06-26 12:44:06 -04001/*
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>
Rob Clark05b84912013-09-28 11:28:35 -040020#include <linux/dma-buf.h>
Rob Clarkc8afe682013-06-26 12:44:06 -040021
22#include "msm_drv.h"
23#include "msm_gem.h"
Rob Clark7198e6b2013-07-19 12:59:32 -040024#include "msm_gpu.h"
Rob Clark871d8122013-11-16 12:56:06 -050025#include "msm_mmu.h"
Rob Clarkc8afe682013-06-26 12:44:06 -040026
Rob Clark871d8122013-11-16 12:56:06 -050027static dma_addr_t physaddr(struct drm_gem_object *obj)
28{
29 struct msm_gem_object *msm_obj = to_msm_bo(obj);
30 struct msm_drm_private *priv = obj->dev->dev_private;
31 return (((dma_addr_t)msm_obj->vram_node->start) << PAGE_SHIFT) +
32 priv->vram.paddr;
33}
34
35/* allocate pages from VRAM carveout, used when no IOMMU: */
36static struct page **get_pages_vram(struct drm_gem_object *obj,
37 int npages)
38{
39 struct msm_gem_object *msm_obj = to_msm_bo(obj);
40 struct msm_drm_private *priv = obj->dev->dev_private;
41 dma_addr_t paddr;
42 struct page **p;
43 int ret, i;
44
45 p = drm_malloc_ab(npages, sizeof(struct page *));
46 if (!p)
47 return ERR_PTR(-ENOMEM);
48
49 ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node,
50 npages, 0, DRM_MM_SEARCH_DEFAULT);
51 if (ret) {
52 drm_free_large(p);
53 return ERR_PTR(ret);
54 }
55
56 paddr = physaddr(obj);
57 for (i = 0; i < npages; i++) {
58 p[i] = phys_to_page(paddr);
59 paddr += PAGE_SIZE;
60 }
61
62 return p;
63}
Rob Clarkc8afe682013-06-26 12:44:06 -040064
65/* called with dev->struct_mutex held */
66static struct page **get_pages(struct drm_gem_object *obj)
67{
68 struct msm_gem_object *msm_obj = to_msm_bo(obj);
69
70 if (!msm_obj->pages) {
71 struct drm_device *dev = obj->dev;
Rob Clark871d8122013-11-16 12:56:06 -050072 struct page **p;
Rob Clarkc8afe682013-06-26 12:44:06 -040073 int npages = obj->size >> PAGE_SHIFT;
74
Rob Clark871d8122013-11-16 12:56:06 -050075 if (iommu_present(&platform_bus_type))
76 p = drm_gem_get_pages(obj, 0);
77 else
78 p = get_pages_vram(obj, npages);
79
Rob Clarkc8afe682013-06-26 12:44:06 -040080 if (IS_ERR(p)) {
81 dev_err(dev->dev, "could not get pages: %ld\n",
82 PTR_ERR(p));
83 return p;
84 }
85
86 msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
Wei Yongjun1f70e072013-09-11 06:56:12 +080087 if (IS_ERR(msm_obj->sgt)) {
Rob Clarkc8afe682013-06-26 12:44:06 -040088 dev_err(dev->dev, "failed to allocate sgt\n");
Wei Yongjun1f70e072013-09-11 06:56:12 +080089 return ERR_CAST(msm_obj->sgt);
Rob Clarkc8afe682013-06-26 12:44:06 -040090 }
91
92 msm_obj->pages = p;
93
94 /* For non-cached buffers, ensure the new pages are clean
95 * because display controller, GPU, etc. are not coherent:
96 */
97 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
98 dma_map_sg(dev->dev, msm_obj->sgt->sgl,
99 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
100 }
101
102 return msm_obj->pages;
103}
104
105static void put_pages(struct drm_gem_object *obj)
106{
107 struct msm_gem_object *msm_obj = to_msm_bo(obj);
108
109 if (msm_obj->pages) {
110 /* For non-cached buffers, ensure the new pages are clean
111 * because display controller, GPU, etc. are not coherent:
112 */
113 if (msm_obj->flags & (MSM_BO_WC|MSM_BO_UNCACHED))
114 dma_unmap_sg(obj->dev->dev, msm_obj->sgt->sgl,
115 msm_obj->sgt->nents, DMA_BIDIRECTIONAL);
116 sg_free_table(msm_obj->sgt);
117 kfree(msm_obj->sgt);
118
Rob Clark871d8122013-11-16 12:56:06 -0500119 if (iommu_present(&platform_bus_type))
120 drm_gem_put_pages(obj, msm_obj->pages, true, false);
121 else
122 drm_mm_remove_node(msm_obj->vram_node);
123
Rob Clarkc8afe682013-06-26 12:44:06 -0400124 msm_obj->pages = NULL;
125 }
126}
127
Rob Clark05b84912013-09-28 11:28:35 -0400128struct page **msm_gem_get_pages(struct drm_gem_object *obj)
129{
130 struct drm_device *dev = obj->dev;
131 struct page **p;
132 mutex_lock(&dev->struct_mutex);
133 p = get_pages(obj);
134 mutex_unlock(&dev->struct_mutex);
135 return p;
136}
137
138void msm_gem_put_pages(struct drm_gem_object *obj)
139{
140 /* when we start tracking the pin count, then do something here */
141}
142
Rob Clarkc8afe682013-06-26 12:44:06 -0400143int msm_gem_mmap_obj(struct drm_gem_object *obj,
144 struct vm_area_struct *vma)
145{
146 struct msm_gem_object *msm_obj = to_msm_bo(obj);
147
148 vma->vm_flags &= ~VM_PFNMAP;
149 vma->vm_flags |= VM_MIXEDMAP;
150
151 if (msm_obj->flags & MSM_BO_WC) {
152 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
153 } else if (msm_obj->flags & MSM_BO_UNCACHED) {
154 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
155 } else {
156 /*
157 * Shunt off cached objs to shmem file so they have their own
158 * address_space (so unmap_mapping_range does what we want,
159 * in particular in the case of mmap'd dmabufs)
160 */
161 fput(vma->vm_file);
162 get_file(obj->filp);
163 vma->vm_pgoff = 0;
164 vma->vm_file = obj->filp;
165
166 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
167 }
168
169 return 0;
170}
171
172int msm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
173{
174 int ret;
175
176 ret = drm_gem_mmap(filp, vma);
177 if (ret) {
178 DBG("mmap failed: %d", ret);
179 return ret;
180 }
181
182 return msm_gem_mmap_obj(vma->vm_private_data, vma);
183}
184
185int msm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
186{
187 struct drm_gem_object *obj = vma->vm_private_data;
Rob Clarkc8afe682013-06-26 12:44:06 -0400188 struct drm_device *dev = obj->dev;
189 struct page **pages;
190 unsigned long pfn;
191 pgoff_t pgoff;
192 int ret;
193
194 /* Make sure we don't parallel update on a fault, nor move or remove
195 * something from beneath our feet
196 */
197 ret = mutex_lock_interruptible(&dev->struct_mutex);
198 if (ret)
199 goto out;
200
201 /* make sure we have pages attached now */
202 pages = get_pages(obj);
203 if (IS_ERR(pages)) {
204 ret = PTR_ERR(pages);
205 goto out_unlock;
206 }
207
208 /* We don't use vmf->pgoff since that has the fake offset: */
209 pgoff = ((unsigned long)vmf->virtual_address -
210 vma->vm_start) >> PAGE_SHIFT;
211
Rob Clark871d8122013-11-16 12:56:06 -0500212 pfn = page_to_pfn(pages[pgoff]);
Rob Clarkc8afe682013-06-26 12:44:06 -0400213
214 VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address,
215 pfn, pfn << PAGE_SHIFT);
216
217 ret = vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn);
218
219out_unlock:
220 mutex_unlock(&dev->struct_mutex);
221out:
222 switch (ret) {
223 case -EAGAIN:
Rob Clarkc8afe682013-06-26 12:44:06 -0400224 case 0:
225 case -ERESTARTSYS:
226 case -EINTR:
Rob Clark505886d2013-10-20 11:57:52 -0400227 case -EBUSY:
228 /*
229 * EBUSY is ok: this just means that another thread
230 * already did the job.
231 */
Rob Clarkc8afe682013-06-26 12:44:06 -0400232 return VM_FAULT_NOPAGE;
233 case -ENOMEM:
234 return VM_FAULT_OOM;
235 default:
236 return VM_FAULT_SIGBUS;
237 }
238}
239
240/** get mmap offset */
241static uint64_t mmap_offset(struct drm_gem_object *obj)
242{
243 struct drm_device *dev = obj->dev;
244 int ret;
245
246 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
247
248 /* Make it mmapable */
249 ret = drm_gem_create_mmap_offset(obj);
250
251 if (ret) {
252 dev_err(dev->dev, "could not allocate mmap offset\n");
253 return 0;
254 }
255
256 return drm_vma_node_offset_addr(&obj->vma_node);
257}
258
259uint64_t msm_gem_mmap_offset(struct drm_gem_object *obj)
260{
261 uint64_t offset;
262 mutex_lock(&obj->dev->struct_mutex);
263 offset = mmap_offset(obj);
264 mutex_unlock(&obj->dev->struct_mutex);
265 return offset;
266}
267
Rob Clarkc8afe682013-06-26 12:44:06 -0400268/* should be called under struct_mutex.. although it can be called
269 * from atomic context without struct_mutex to acquire an extra
270 * iova ref if you know one is already held.
271 *
272 * That means when I do eventually need to add support for unpinning
273 * the refcnt counter needs to be atomic_t.
274 */
275int msm_gem_get_iova_locked(struct drm_gem_object *obj, int id,
276 uint32_t *iova)
277{
278 struct msm_gem_object *msm_obj = to_msm_bo(obj);
279 int ret = 0;
280
281 if (!msm_obj->domain[id].iova) {
282 struct msm_drm_private *priv = obj->dev->dev_private;
Rob Clark871d8122013-11-16 12:56:06 -0500283 struct msm_mmu *mmu = priv->mmus[id];
284 struct page **pages = get_pages(obj);
285
Rob Clarkc8afe682013-06-26 12:44:06 -0400286 if (IS_ERR(pages))
287 return PTR_ERR(pages);
Rob Clark871d8122013-11-16 12:56:06 -0500288
289 if (iommu_present(&platform_bus_type)) {
290 uint32_t offset = (uint32_t)mmap_offset(obj);
291 ret = mmu->funcs->map(mmu, offset, msm_obj->sgt,
292 obj->size, IOMMU_READ | IOMMU_WRITE);
293 msm_obj->domain[id].iova = offset;
294 } else {
295 msm_obj->domain[id].iova = physaddr(obj);
296 }
Rob Clarkc8afe682013-06-26 12:44:06 -0400297 }
298
299 if (!ret)
300 *iova = msm_obj->domain[id].iova;
301
302 return ret;
303}
304
305int msm_gem_get_iova(struct drm_gem_object *obj, int id, uint32_t *iova)
306{
Rob Clarkedd4fc62013-09-14 14:01:55 -0400307 struct msm_gem_object *msm_obj = to_msm_bo(obj);
Rob Clarkc8afe682013-06-26 12:44:06 -0400308 int ret;
Rob Clarkedd4fc62013-09-14 14:01:55 -0400309
310 /* this is safe right now because we don't unmap until the
311 * bo is deleted:
312 */
313 if (msm_obj->domain[id].iova) {
314 *iova = msm_obj->domain[id].iova;
315 return 0;
316 }
317
Rob Clarkc8afe682013-06-26 12:44:06 -0400318 mutex_lock(&obj->dev->struct_mutex);
319 ret = msm_gem_get_iova_locked(obj, id, iova);
320 mutex_unlock(&obj->dev->struct_mutex);
321 return ret;
322}
323
324void msm_gem_put_iova(struct drm_gem_object *obj, int id)
325{
326 // XXX TODO ..
327 // NOTE: probably don't need a _locked() version.. we wouldn't
328 // normally unmap here, but instead just mark that it could be
329 // unmapped (if the iova refcnt drops to zero), but then later
330 // if another _get_iova_locked() fails we can start unmapping
331 // things that are no longer needed..
332}
333
334int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
335 struct drm_mode_create_dumb *args)
336{
337 args->pitch = align_pitch(args->width, args->bpp);
338 args->size = PAGE_ALIGN(args->pitch * args->height);
339 return msm_gem_new_handle(dev, file, args->size,
340 MSM_BO_SCANOUT | MSM_BO_WC, &args->handle);
341}
342
Rob Clarkc8afe682013-06-26 12:44:06 -0400343int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
344 uint32_t handle, uint64_t *offset)
345{
346 struct drm_gem_object *obj;
347 int ret = 0;
348
349 /* GEM does all our handle to object mapping */
350 obj = drm_gem_object_lookup(dev, file, handle);
351 if (obj == NULL) {
352 ret = -ENOENT;
353 goto fail;
354 }
355
356 *offset = msm_gem_mmap_offset(obj);
357
358 drm_gem_object_unreference_unlocked(obj);
359
360fail:
361 return ret;
362}
363
364void *msm_gem_vaddr_locked(struct drm_gem_object *obj)
365{
366 struct msm_gem_object *msm_obj = to_msm_bo(obj);
367 WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
368 if (!msm_obj->vaddr) {
369 struct page **pages = get_pages(obj);
370 if (IS_ERR(pages))
371 return ERR_CAST(pages);
372 msm_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
373 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
374 }
375 return msm_obj->vaddr;
376}
377
378void *msm_gem_vaddr(struct drm_gem_object *obj)
379{
380 void *ret;
381 mutex_lock(&obj->dev->struct_mutex);
382 ret = msm_gem_vaddr_locked(obj);
383 mutex_unlock(&obj->dev->struct_mutex);
384 return ret;
385}
386
Rob Clarkedd4fc62013-09-14 14:01:55 -0400387/* setup callback for when bo is no longer busy..
388 * TODO probably want to differentiate read vs write..
389 */
390int msm_gem_queue_inactive_cb(struct drm_gem_object *obj,
391 struct msm_fence_cb *cb)
Rob Clarkc8afe682013-06-26 12:44:06 -0400392{
393 struct drm_device *dev = obj->dev;
394 struct msm_drm_private *priv = dev->dev_private;
Rob Clark7198e6b2013-07-19 12:59:32 -0400395 struct msm_gem_object *msm_obj = to_msm_bo(obj);
396 int ret = 0;
Rob Clarkc8afe682013-06-26 12:44:06 -0400397
Rob Clark7198e6b2013-07-19 12:59:32 -0400398 mutex_lock(&dev->struct_mutex);
Rob Clarkedd4fc62013-09-14 14:01:55 -0400399 if (!list_empty(&cb->work.entry)) {
Rob Clark7198e6b2013-07-19 12:59:32 -0400400 ret = -EINVAL;
401 } else if (is_active(msm_obj)) {
Rob Clarkedd4fc62013-09-14 14:01:55 -0400402 cb->fence = max(msm_obj->read_fence, msm_obj->write_fence);
403 list_add_tail(&cb->work.entry, &priv->fence_cbs);
Rob Clark7198e6b2013-07-19 12:59:32 -0400404 } else {
Rob Clarkedd4fc62013-09-14 14:01:55 -0400405 queue_work(priv->wq, &cb->work);
Rob Clark7198e6b2013-07-19 12:59:32 -0400406 }
407 mutex_unlock(&dev->struct_mutex);
Rob Clarkc8afe682013-06-26 12:44:06 -0400408
Rob Clark7198e6b2013-07-19 12:59:32 -0400409 return ret;
410}
411
412void msm_gem_move_to_active(struct drm_gem_object *obj,
Rob Clarkbf6811f2013-09-01 13:25:09 -0400413 struct msm_gpu *gpu, bool write, uint32_t fence)
Rob Clark7198e6b2013-07-19 12:59:32 -0400414{
415 struct msm_gem_object *msm_obj = to_msm_bo(obj);
416 msm_obj->gpu = gpu;
Rob Clarkbf6811f2013-09-01 13:25:09 -0400417 if (write)
418 msm_obj->write_fence = fence;
419 else
420 msm_obj->read_fence = fence;
Rob Clark7198e6b2013-07-19 12:59:32 -0400421 list_del_init(&msm_obj->mm_list);
422 list_add_tail(&msm_obj->mm_list, &gpu->active_list);
423}
424
425void msm_gem_move_to_inactive(struct drm_gem_object *obj)
426{
427 struct drm_device *dev = obj->dev;
428 struct msm_drm_private *priv = dev->dev_private;
429 struct msm_gem_object *msm_obj = to_msm_bo(obj);
430
431 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
432
433 msm_obj->gpu = NULL;
Rob Clarkbf6811f2013-09-01 13:25:09 -0400434 msm_obj->read_fence = 0;
435 msm_obj->write_fence = 0;
Rob Clark7198e6b2013-07-19 12:59:32 -0400436 list_del_init(&msm_obj->mm_list);
437 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
Rob Clark7198e6b2013-07-19 12:59:32 -0400438}
439
440int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op,
441 struct timespec *timeout)
442{
443 struct drm_device *dev = obj->dev;
444 struct msm_gem_object *msm_obj = to_msm_bo(obj);
445 int ret = 0;
446
Rob Clarkf816f272013-09-11 17:34:07 -0400447 if (is_active(msm_obj)) {
Rob Clarkbf6811f2013-09-01 13:25:09 -0400448 uint32_t fence = 0;
Rob Clarkf816f272013-09-11 17:34:07 -0400449
Rob Clarkbf6811f2013-09-01 13:25:09 -0400450 if (op & MSM_PREP_READ)
451 fence = msm_obj->write_fence;
452 if (op & MSM_PREP_WRITE)
453 fence = max(fence, msm_obj->read_fence);
Rob Clarkf816f272013-09-11 17:34:07 -0400454 if (op & MSM_PREP_NOSYNC)
455 timeout = NULL;
456
Rob Clarkbf6811f2013-09-01 13:25:09 -0400457 ret = msm_wait_fence_interruptable(dev, fence, timeout);
458 }
Rob Clark7198e6b2013-07-19 12:59:32 -0400459
460 /* TODO cache maintenance */
461
462 return ret;
463}
464
465int msm_gem_cpu_fini(struct drm_gem_object *obj)
466{
467 /* TODO cache maintenance */
Rob Clarkc8afe682013-06-26 12:44:06 -0400468 return 0;
469}
470
471#ifdef CONFIG_DEBUG_FS
472void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
473{
474 struct drm_device *dev = obj->dev;
475 struct msm_gem_object *msm_obj = to_msm_bo(obj);
476 uint64_t off = drm_vma_node_start(&obj->vma_node);
477
478 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
Rob Clarkbf6811f2013-09-01 13:25:09 -0400479 seq_printf(m, "%08x: %c(r=%u,w=%u) %2d (%2d) %08llx %p %d\n",
Rob Clark7198e6b2013-07-19 12:59:32 -0400480 msm_obj->flags, is_active(msm_obj) ? 'A' : 'I',
Rob Clarkbf6811f2013-09-01 13:25:09 -0400481 msm_obj->read_fence, msm_obj->write_fence,
482 obj->name, obj->refcount.refcount.counter,
Rob Clarkc8afe682013-06-26 12:44:06 -0400483 off, msm_obj->vaddr, obj->size);
484}
485
486void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
487{
488 struct msm_gem_object *msm_obj;
489 int count = 0;
490 size_t size = 0;
491
492 list_for_each_entry(msm_obj, list, mm_list) {
493 struct drm_gem_object *obj = &msm_obj->base;
494 seq_printf(m, " ");
495 msm_gem_describe(obj, m);
496 count++;
497 size += obj->size;
498 }
499
500 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
501}
502#endif
503
504void msm_gem_free_object(struct drm_gem_object *obj)
505{
506 struct drm_device *dev = obj->dev;
Rob Clark871d8122013-11-16 12:56:06 -0500507 struct msm_drm_private *priv = obj->dev->dev_private;
Rob Clarkc8afe682013-06-26 12:44:06 -0400508 struct msm_gem_object *msm_obj = to_msm_bo(obj);
509 int id;
510
511 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
512
Rob Clark7198e6b2013-07-19 12:59:32 -0400513 /* object should not be on active list: */
514 WARN_ON(is_active(msm_obj));
515
Rob Clarkc8afe682013-06-26 12:44:06 -0400516 list_del(&msm_obj->mm_list);
517
518 for (id = 0; id < ARRAY_SIZE(msm_obj->domain); id++) {
Rob Clark871d8122013-11-16 12:56:06 -0500519 struct msm_mmu *mmu = priv->mmus[id];
520 if (mmu && msm_obj->domain[id].iova) {
Rob Clarkc8afe682013-06-26 12:44:06 -0400521 uint32_t offset = (uint32_t)mmap_offset(obj);
Rob Clark871d8122013-11-16 12:56:06 -0500522 mmu->funcs->unmap(mmu, offset, msm_obj->sgt, obj->size);
Rob Clarkc8afe682013-06-26 12:44:06 -0400523 }
524 }
525
526 drm_gem_free_mmap_offset(obj);
527
Rob Clark05b84912013-09-28 11:28:35 -0400528 if (obj->import_attach) {
529 if (msm_obj->vaddr)
530 dma_buf_vunmap(obj->import_attach->dmabuf, msm_obj->vaddr);
Rob Clarkc8afe682013-06-26 12:44:06 -0400531
Rob Clark05b84912013-09-28 11:28:35 -0400532 /* Don't drop the pages for imported dmabuf, as they are not
533 * ours, just free the array we allocated:
534 */
535 if (msm_obj->pages)
536 drm_free_large(msm_obj->pages);
537
538 } else {
539 if (msm_obj->vaddr)
540 vunmap(msm_obj->vaddr);
541 put_pages(obj);
542 }
Rob Clarkc8afe682013-06-26 12:44:06 -0400543
Rob Clark7198e6b2013-07-19 12:59:32 -0400544 if (msm_obj->resv == &msm_obj->_resv)
545 reservation_object_fini(msm_obj->resv);
546
Rob Clarkc8afe682013-06-26 12:44:06 -0400547 drm_gem_object_release(obj);
548
549 kfree(msm_obj);
550}
551
552/* convenience method to construct a GEM buffer object, and userspace handle */
553int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
554 uint32_t size, uint32_t flags, uint32_t *handle)
555{
556 struct drm_gem_object *obj;
557 int ret;
558
559 ret = mutex_lock_interruptible(&dev->struct_mutex);
560 if (ret)
561 return ret;
562
563 obj = msm_gem_new(dev, size, flags);
564
565 mutex_unlock(&dev->struct_mutex);
566
567 if (IS_ERR(obj))
568 return PTR_ERR(obj);
569
570 ret = drm_gem_handle_create(file, obj, handle);
571
572 /* drop reference from allocate - handle holds it now */
573 drm_gem_object_unreference_unlocked(obj);
574
575 return ret;
576}
577
Rob Clark05b84912013-09-28 11:28:35 -0400578static int msm_gem_new_impl(struct drm_device *dev,
579 uint32_t size, uint32_t flags,
580 struct drm_gem_object **obj)
Rob Clarkc8afe682013-06-26 12:44:06 -0400581{
582 struct msm_drm_private *priv = dev->dev_private;
583 struct msm_gem_object *msm_obj;
Rob Clark871d8122013-11-16 12:56:06 -0500584 unsigned sz;
Rob Clarkc8afe682013-06-26 12:44:06 -0400585
586 switch (flags & MSM_BO_CACHE_MASK) {
587 case MSM_BO_UNCACHED:
588 case MSM_BO_CACHED:
589 case MSM_BO_WC:
590 break;
591 default:
592 dev_err(dev->dev, "invalid cache flag: %x\n",
593 (flags & MSM_BO_CACHE_MASK));
Rob Clark05b84912013-09-28 11:28:35 -0400594 return -EINVAL;
Rob Clarkc8afe682013-06-26 12:44:06 -0400595 }
596
Rob Clark871d8122013-11-16 12:56:06 -0500597 sz = sizeof(*msm_obj);
598 if (!iommu_present(&platform_bus_type))
599 sz += sizeof(struct drm_mm_node);
600
601 msm_obj = kzalloc(sz, GFP_KERNEL);
Rob Clark05b84912013-09-28 11:28:35 -0400602 if (!msm_obj)
603 return -ENOMEM;
Rob Clarkc8afe682013-06-26 12:44:06 -0400604
Rob Clark871d8122013-11-16 12:56:06 -0500605 if (!iommu_present(&platform_bus_type))
606 msm_obj->vram_node = (void *)&msm_obj[1];
607
Rob Clarkc8afe682013-06-26 12:44:06 -0400608 msm_obj->flags = flags;
609
Rob Clark7198e6b2013-07-19 12:59:32 -0400610 msm_obj->resv = &msm_obj->_resv;
611 reservation_object_init(msm_obj->resv);
Rob Clarkc8afe682013-06-26 12:44:06 -0400612
Rob Clark7198e6b2013-07-19 12:59:32 -0400613 INIT_LIST_HEAD(&msm_obj->submit_entry);
Rob Clarkc8afe682013-06-26 12:44:06 -0400614 list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
615
Rob Clark05b84912013-09-28 11:28:35 -0400616 *obj = &msm_obj->base;
617
618 return 0;
619}
620
621struct drm_gem_object *msm_gem_new(struct drm_device *dev,
622 uint32_t size, uint32_t flags)
623{
Rob Clark871d8122013-11-16 12:56:06 -0500624 struct drm_gem_object *obj = NULL;
Rob Clark05b84912013-09-28 11:28:35 -0400625 int ret;
626
627 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
628
629 size = PAGE_ALIGN(size);
630
631 ret = msm_gem_new_impl(dev, size, flags, &obj);
632 if (ret)
633 goto fail;
634
Rob Clark871d8122013-11-16 12:56:06 -0500635 if (iommu_present(&platform_bus_type)) {
636 ret = drm_gem_object_init(dev, obj, size);
637 if (ret)
638 goto fail;
639 } else {
640 drm_gem_private_object_init(dev, obj, size);
641 }
Rob Clark05b84912013-09-28 11:28:35 -0400642
643 return obj;
644
645fail:
646 if (obj)
647 drm_gem_object_unreference_unlocked(obj);
648
649 return ERR_PTR(ret);
650}
651
652struct drm_gem_object *msm_gem_import(struct drm_device *dev,
653 uint32_t size, struct sg_table *sgt)
654{
655 struct msm_gem_object *msm_obj;
656 struct drm_gem_object *obj;
657 int ret, npages;
658
Rob Clark871d8122013-11-16 12:56:06 -0500659 /* if we don't have IOMMU, don't bother pretending we can import: */
660 if (!iommu_present(&platform_bus_type)) {
661 dev_err(dev->dev, "cannot import without IOMMU\n");
662 return ERR_PTR(-EINVAL);
663 }
664
Rob Clark05b84912013-09-28 11:28:35 -0400665 size = PAGE_ALIGN(size);
666
667 ret = msm_gem_new_impl(dev, size, MSM_BO_WC, &obj);
668 if (ret)
669 goto fail;
670
671 drm_gem_private_object_init(dev, obj, size);
672
673 npages = size / PAGE_SIZE;
674
675 msm_obj = to_msm_bo(obj);
676 msm_obj->sgt = sgt;
677 msm_obj->pages = drm_malloc_ab(npages, sizeof(struct page *));
678 if (!msm_obj->pages) {
679 ret = -ENOMEM;
680 goto fail;
681 }
682
683 ret = drm_prime_sg_to_page_addr_arrays(sgt, msm_obj->pages, NULL, npages);
684 if (ret)
685 goto fail;
686
Rob Clarkc8afe682013-06-26 12:44:06 -0400687 return obj;
688
689fail:
690 if (obj)
691 drm_gem_object_unreference_unlocked(obj);
692
693 return ERR_PTR(ret);
694}