]>
Commit | Line | Data |
---|---|---|
c30707be RSZ |
1 | /* |
2 | * drivers/staging/android/ion/ion.c | |
3 | * | |
4 | * Copyright (C) 2011 Google, Inc. | |
5 | * | |
6 | * This software is licensed under the terms of the GNU General Public | |
7 | * License version 2, as published by the Free Software Foundation, and | |
8 | * may be copied, distributed, and modified under those terms. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/device.h> | |
18 | #include <linux/file.h> | |
19 | #include <linux/fs.h> | |
20 | #include <linux/anon_inodes.h> | |
21 | #include <linux/list.h> | |
2991b7a0 | 22 | #include <linux/memblock.h> |
c30707be RSZ |
23 | #include <linux/miscdevice.h> |
24 | #include <linux/export.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/mm_types.h> | |
27 | #include <linux/rbtree.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/seq_file.h> | |
31 | #include <linux/uaccess.h> | |
32 | #include <linux/debugfs.h> | |
b892bf75 | 33 | #include <linux/dma-buf.h> |
c30707be RSZ |
34 | |
35 | #include "ion.h" | |
36 | #include "ion_priv.h" | |
c30707be RSZ |
37 | |
38 | /** | |
39 | * struct ion_device - the metadata of the ion device node | |
40 | * @dev: the actual misc device | |
8d7ab9a9 RSZ |
41 | * @buffers: an rb tree of all the existing buffers |
42 | * @buffer_lock: lock protecting the tree of buffers | |
43 | * @lock: rwsem protecting the tree of heaps and clients | |
c30707be RSZ |
44 | * @heaps: list of all the heaps in the system |
45 | * @user_clients: list of all the clients created from userspace | |
46 | */ | |
47 | struct ion_device { | |
48 | struct miscdevice dev; | |
49 | struct rb_root buffers; | |
8d7ab9a9 RSZ |
50 | struct mutex buffer_lock; |
51 | struct rw_semaphore lock; | |
c30707be RSZ |
52 | struct rb_root heaps; |
53 | long (*custom_ioctl) (struct ion_client *client, unsigned int cmd, | |
54 | unsigned long arg); | |
b892bf75 | 55 | struct rb_root clients; |
c30707be RSZ |
56 | struct dentry *debug_root; |
57 | }; | |
58 | ||
59 | /** | |
60 | * struct ion_client - a process/hw block local address space | |
c30707be RSZ |
61 | * @node: node in the tree of all clients |
62 | * @dev: backpointer to ion device | |
63 | * @handles: an rb tree of all the handles in this client | |
64 | * @lock: lock protecting the tree of handles | |
65 | * @heap_mask: mask of all supported heaps | |
66 | * @name: used for debugging | |
67 | * @task: used for debugging | |
68 | * | |
69 | * A client represents a list of buffers this client may access. | |
70 | * The mutex stored here is used to protect both handles tree | |
71 | * as well as the handles themselves, and should be held while modifying either. | |
72 | */ | |
73 | struct ion_client { | |
c30707be RSZ |
74 | struct rb_node node; |
75 | struct ion_device *dev; | |
76 | struct rb_root handles; | |
77 | struct mutex lock; | |
78 | unsigned int heap_mask; | |
79 | const char *name; | |
80 | struct task_struct *task; | |
81 | pid_t pid; | |
82 | struct dentry *debug_root; | |
83 | }; | |
84 | ||
85 | /** | |
86 | * ion_handle - a client local reference to a buffer | |
87 | * @ref: reference count | |
88 | * @client: back pointer to the client the buffer resides in | |
89 | * @buffer: pointer to the buffer | |
90 | * @node: node in the client's handle rbtree | |
91 | * @kmap_cnt: count of times this client has mapped to kernel | |
92 | * @dmap_cnt: count of times this client has mapped for dma | |
c30707be RSZ |
93 | * |
94 | * Modifications to node, map_cnt or mapping should be protected by the | |
95 | * lock in the client. Other fields are never changed after initialization. | |
96 | */ | |
97 | struct ion_handle { | |
98 | struct kref ref; | |
99 | struct ion_client *client; | |
100 | struct ion_buffer *buffer; | |
101 | struct rb_node node; | |
102 | unsigned int kmap_cnt; | |
c30707be RSZ |
103 | }; |
104 | ||
13ba7805 RSZ |
105 | bool ion_buffer_fault_user_mappings(struct ion_buffer *buffer) |
106 | { | |
107 | return ((buffer->flags & ION_FLAG_CACHED) && | |
108 | !(buffer->flags & ION_FLAG_CACHED_NEEDS_SYNC)); | |
109 | } | |
110 | ||
45b17a80 RSZ |
111 | bool ion_buffer_cached(struct ion_buffer *buffer) |
112 | { | |
113 | return !!(buffer->flags & ION_FLAG_CACHED); | |
114 | } | |
115 | ||
c30707be RSZ |
116 | /* this function should only be called while dev->lock is held */ |
117 | static void ion_buffer_add(struct ion_device *dev, | |
118 | struct ion_buffer *buffer) | |
119 | { | |
120 | struct rb_node **p = &dev->buffers.rb_node; | |
121 | struct rb_node *parent = NULL; | |
122 | struct ion_buffer *entry; | |
123 | ||
124 | while (*p) { | |
125 | parent = *p; | |
126 | entry = rb_entry(parent, struct ion_buffer, node); | |
127 | ||
128 | if (buffer < entry) { | |
129 | p = &(*p)->rb_left; | |
130 | } else if (buffer > entry) { | |
131 | p = &(*p)->rb_right; | |
132 | } else { | |
133 | pr_err("%s: buffer already found.", __func__); | |
134 | BUG(); | |
135 | } | |
136 | } | |
137 | ||
138 | rb_link_node(&buffer->node, parent, p); | |
139 | rb_insert_color(&buffer->node, &dev->buffers); | |
140 | } | |
141 | ||
56a7c185 RSZ |
142 | static int ion_buffer_alloc_dirty(struct ion_buffer *buffer); |
143 | ||
c30707be RSZ |
144 | /* this function should only be called while dev->lock is held */ |
145 | static struct ion_buffer *ion_buffer_create(struct ion_heap *heap, | |
146 | struct ion_device *dev, | |
147 | unsigned long len, | |
148 | unsigned long align, | |
149 | unsigned long flags) | |
150 | { | |
151 | struct ion_buffer *buffer; | |
29ae6bc7 | 152 | struct sg_table *table; |
a46b6b2d RSZ |
153 | struct scatterlist *sg; |
154 | int i, ret; | |
c30707be RSZ |
155 | |
156 | buffer = kzalloc(sizeof(struct ion_buffer), GFP_KERNEL); | |
157 | if (!buffer) | |
158 | return ERR_PTR(-ENOMEM); | |
159 | ||
160 | buffer->heap = heap; | |
13ba7805 | 161 | buffer->flags = flags; |
c30707be RSZ |
162 | kref_init(&buffer->ref); |
163 | ||
164 | ret = heap->ops->allocate(heap, buffer, len, align, flags); | |
165 | if (ret) { | |
166 | kfree(buffer); | |
167 | return ERR_PTR(ret); | |
168 | } | |
29ae6bc7 | 169 | |
056be396 GH |
170 | buffer->dev = dev; |
171 | buffer->size = len; | |
172 | ||
56a7c185 | 173 | table = heap->ops->map_dma(heap, buffer); |
29ae6bc7 RSZ |
174 | if (IS_ERR_OR_NULL(table)) { |
175 | heap->ops->free(buffer); | |
176 | kfree(buffer); | |
177 | return ERR_PTR(PTR_ERR(table)); | |
178 | } | |
179 | buffer->sg_table = table; | |
13ba7805 | 180 | if (ion_buffer_fault_user_mappings(buffer)) { |
56a7c185 RSZ |
181 | for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, |
182 | i) { | |
183 | if (sg_dma_len(sg) == PAGE_SIZE) | |
184 | continue; | |
13ba7805 RSZ |
185 | pr_err("%s: cached mappings that will be faulted in " |
186 | "must have pagewise sg_lists\n", __func__); | |
d3c0bced RSZ |
187 | ret = -EINVAL; |
188 | goto err; | |
56a7c185 | 189 | } |
29ae6bc7 | 190 | |
d3c0bced RSZ |
191 | ret = ion_buffer_alloc_dirty(buffer); |
192 | if (ret) | |
193 | goto err; | |
56a7c185 RSZ |
194 | } |
195 | ||
196 | buffer->dev = dev; | |
197 | buffer->size = len; | |
198 | INIT_LIST_HEAD(&buffer->vmas); | |
c30707be | 199 | mutex_init(&buffer->lock); |
a46b6b2d RSZ |
200 | /* this will set up dma addresses for the sglist -- it is not |
201 | technically correct as per the dma api -- a specific | |
202 | device isn't really taking ownership here. However, in practice on | |
203 | our systems the only dma_address space is physical addresses. | |
204 | Additionally, we can't afford the overhead of invalidating every | |
205 | allocation via dma_map_sg. The implicit contract here is that | |
206 | memory comming from the heaps is ready for dma, ie if it has a | |
207 | cached mapping that mapping has been invalidated */ | |
208 | for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i) | |
209 | sg_dma_address(sg) = sg_phys(sg); | |
8d7ab9a9 | 210 | mutex_lock(&dev->buffer_lock); |
c30707be | 211 | ion_buffer_add(dev, buffer); |
8d7ab9a9 | 212 | mutex_unlock(&dev->buffer_lock); |
c30707be | 213 | return buffer; |
d3c0bced RSZ |
214 | |
215 | err: | |
216 | heap->ops->unmap_dma(heap, buffer); | |
217 | heap->ops->free(buffer); | |
218 | kfree(buffer); | |
219 | return ERR_PTR(ret); | |
c30707be RSZ |
220 | } |
221 | ||
222 | static void ion_buffer_destroy(struct kref *kref) | |
223 | { | |
224 | struct ion_buffer *buffer = container_of(kref, struct ion_buffer, ref); | |
225 | struct ion_device *dev = buffer->dev; | |
226 | ||
54ac0784 KC |
227 | if (WARN_ON(buffer->kmap_cnt > 0)) |
228 | buffer->heap->ops->unmap_kernel(buffer->heap, buffer); | |
29ae6bc7 | 229 | buffer->heap->ops->unmap_dma(buffer->heap, buffer); |
c30707be | 230 | buffer->heap->ops->free(buffer); |
8d7ab9a9 | 231 | mutex_lock(&dev->buffer_lock); |
c30707be | 232 | rb_erase(&buffer->node, &dev->buffers); |
8d7ab9a9 | 233 | mutex_unlock(&dev->buffer_lock); |
d3c0bced RSZ |
234 | if (buffer->flags & ION_FLAG_CACHED) |
235 | kfree(buffer->dirty); | |
c30707be RSZ |
236 | kfree(buffer); |
237 | } | |
238 | ||
239 | static void ion_buffer_get(struct ion_buffer *buffer) | |
240 | { | |
241 | kref_get(&buffer->ref); | |
242 | } | |
243 | ||
244 | static int ion_buffer_put(struct ion_buffer *buffer) | |
245 | { | |
246 | return kref_put(&buffer->ref, ion_buffer_destroy); | |
247 | } | |
248 | ||
5ad7bc3a RSZ |
249 | static void ion_buffer_add_to_handle(struct ion_buffer *buffer) |
250 | { | |
8d7ab9a9 | 251 | mutex_lock(&buffer->lock); |
5ad7bc3a | 252 | buffer->handle_count++; |
8d7ab9a9 | 253 | mutex_unlock(&buffer->lock); |
5ad7bc3a RSZ |
254 | } |
255 | ||
256 | static void ion_buffer_remove_from_handle(struct ion_buffer *buffer) | |
257 | { | |
258 | /* | |
259 | * when a buffer is removed from a handle, if it is not in | |
260 | * any other handles, copy the taskcomm and the pid of the | |
261 | * process it's being removed from into the buffer. At this | |
262 | * point there will be no way to track what processes this buffer is | |
263 | * being used by, it only exists as a dma_buf file descriptor. | |
264 | * The taskcomm and pid can provide a debug hint as to where this fd | |
265 | * is in the system | |
266 | */ | |
8d7ab9a9 | 267 | mutex_lock(&buffer->lock); |
5ad7bc3a RSZ |
268 | buffer->handle_count--; |
269 | BUG_ON(buffer->handle_count < 0); | |
270 | if (!buffer->handle_count) { | |
271 | struct task_struct *task; | |
272 | ||
273 | task = current->group_leader; | |
274 | get_task_comm(buffer->task_comm, task); | |
275 | buffer->pid = task_pid_nr(task); | |
276 | } | |
8d7ab9a9 | 277 | mutex_unlock(&buffer->lock); |
5ad7bc3a RSZ |
278 | } |
279 | ||
c30707be RSZ |
280 | static struct ion_handle *ion_handle_create(struct ion_client *client, |
281 | struct ion_buffer *buffer) | |
282 | { | |
283 | struct ion_handle *handle; | |
284 | ||
285 | handle = kzalloc(sizeof(struct ion_handle), GFP_KERNEL); | |
286 | if (!handle) | |
287 | return ERR_PTR(-ENOMEM); | |
288 | kref_init(&handle->ref); | |
289 | RB_CLEAR_NODE(&handle->node); | |
290 | handle->client = client; | |
291 | ion_buffer_get(buffer); | |
5ad7bc3a | 292 | ion_buffer_add_to_handle(buffer); |
c30707be RSZ |
293 | handle->buffer = buffer; |
294 | ||
295 | return handle; | |
296 | } | |
297 | ||
b892bf75 RSZ |
298 | static void ion_handle_kmap_put(struct ion_handle *); |
299 | ||
c30707be RSZ |
300 | static void ion_handle_destroy(struct kref *kref) |
301 | { | |
302 | struct ion_handle *handle = container_of(kref, struct ion_handle, ref); | |
b892bf75 RSZ |
303 | struct ion_client *client = handle->client; |
304 | struct ion_buffer *buffer = handle->buffer; | |
305 | ||
b892bf75 | 306 | mutex_lock(&buffer->lock); |
2900cd76 | 307 | while (handle->kmap_cnt) |
b892bf75 RSZ |
308 | ion_handle_kmap_put(handle); |
309 | mutex_unlock(&buffer->lock); | |
310 | ||
c30707be | 311 | if (!RB_EMPTY_NODE(&handle->node)) |
b892bf75 | 312 | rb_erase(&handle->node, &client->handles); |
b892bf75 | 313 | |
5ad7bc3a | 314 | ion_buffer_remove_from_handle(buffer); |
b892bf75 | 315 | ion_buffer_put(buffer); |
5ad7bc3a | 316 | |
c30707be RSZ |
317 | kfree(handle); |
318 | } | |
319 | ||
320 | struct ion_buffer *ion_handle_buffer(struct ion_handle *handle) | |
321 | { | |
322 | return handle->buffer; | |
323 | } | |
324 | ||
325 | static void ion_handle_get(struct ion_handle *handle) | |
326 | { | |
327 | kref_get(&handle->ref); | |
328 | } | |
329 | ||
330 | static int ion_handle_put(struct ion_handle *handle) | |
331 | { | |
332 | return kref_put(&handle->ref, ion_handle_destroy); | |
333 | } | |
334 | ||
335 | static struct ion_handle *ion_handle_lookup(struct ion_client *client, | |
336 | struct ion_buffer *buffer) | |
337 | { | |
338 | struct rb_node *n; | |
339 | ||
340 | for (n = rb_first(&client->handles); n; n = rb_next(n)) { | |
341 | struct ion_handle *handle = rb_entry(n, struct ion_handle, | |
342 | node); | |
343 | if (handle->buffer == buffer) | |
344 | return handle; | |
345 | } | |
346 | return NULL; | |
347 | } | |
348 | ||
349 | static bool ion_handle_validate(struct ion_client *client, struct ion_handle *handle) | |
350 | { | |
351 | struct rb_node *n = client->handles.rb_node; | |
352 | ||
353 | while (n) { | |
354 | struct ion_handle *handle_node = rb_entry(n, struct ion_handle, | |
355 | node); | |
356 | if (handle < handle_node) | |
357 | n = n->rb_left; | |
358 | else if (handle > handle_node) | |
359 | n = n->rb_right; | |
360 | else | |
361 | return true; | |
362 | } | |
363 | return false; | |
364 | } | |
365 | ||
366 | static void ion_handle_add(struct ion_client *client, struct ion_handle *handle) | |
367 | { | |
368 | struct rb_node **p = &client->handles.rb_node; | |
369 | struct rb_node *parent = NULL; | |
370 | struct ion_handle *entry; | |
371 | ||
372 | while (*p) { | |
373 | parent = *p; | |
374 | entry = rb_entry(parent, struct ion_handle, node); | |
375 | ||
376 | if (handle < entry) | |
377 | p = &(*p)->rb_left; | |
378 | else if (handle > entry) | |
379 | p = &(*p)->rb_right; | |
380 | else | |
381 | WARN(1, "%s: buffer already found.", __func__); | |
382 | } | |
383 | ||
384 | rb_link_node(&handle->node, parent, p); | |
385 | rb_insert_color(&handle->node, &client->handles); | |
386 | } | |
387 | ||
388 | struct ion_handle *ion_alloc(struct ion_client *client, size_t len, | |
56a7c185 RSZ |
389 | size_t align, unsigned int heap_mask, |
390 | unsigned int flags) | |
c30707be RSZ |
391 | { |
392 | struct rb_node *n; | |
393 | struct ion_handle *handle; | |
394 | struct ion_device *dev = client->dev; | |
395 | struct ion_buffer *buffer = NULL; | |
396 | ||
56a7c185 RSZ |
397 | pr_debug("%s: len %d align %d heap_mask %u flags %x\n", __func__, len, |
398 | align, heap_mask, flags); | |
c30707be RSZ |
399 | /* |
400 | * traverse the list of heaps available in this system in priority | |
401 | * order. If the heap type is supported by the client, and matches the | |
402 | * request of the caller allocate from it. Repeat until allocate has | |
403 | * succeeded or all heaps have been tried | |
404 | */ | |
54ac0784 KC |
405 | if (WARN_ON(!len)) |
406 | return ERR_PTR(-EINVAL); | |
407 | ||
408 | len = PAGE_ALIGN(len); | |
409 | ||
8d7ab9a9 | 410 | down_read(&dev->lock); |
c30707be RSZ |
411 | for (n = rb_first(&dev->heaps); n != NULL; n = rb_next(n)) { |
412 | struct ion_heap *heap = rb_entry(n, struct ion_heap, node); | |
413 | /* if the client doesn't support this heap type */ | |
414 | if (!((1 << heap->type) & client->heap_mask)) | |
415 | continue; | |
416 | /* if the caller didn't specify this heap type */ | |
56a7c185 | 417 | if (!((1 << heap->id) & heap_mask)) |
c30707be RSZ |
418 | continue; |
419 | buffer = ion_buffer_create(heap, dev, len, align, flags); | |
420 | if (!IS_ERR_OR_NULL(buffer)) | |
421 | break; | |
422 | } | |
8d7ab9a9 | 423 | up_read(&dev->lock); |
c30707be | 424 | |
54ac0784 KC |
425 | if (buffer == NULL) |
426 | return ERR_PTR(-ENODEV); | |
427 | ||
428 | if (IS_ERR(buffer)) | |
c30707be RSZ |
429 | return ERR_PTR(PTR_ERR(buffer)); |
430 | ||
431 | handle = ion_handle_create(client, buffer); | |
432 | ||
c30707be RSZ |
433 | /* |
434 | * ion_buffer_create will create a buffer with a ref_cnt of 1, | |
435 | * and ion_handle_create will take a second reference, drop one here | |
436 | */ | |
437 | ion_buffer_put(buffer); | |
438 | ||
54ac0784 KC |
439 | if (!IS_ERR(handle)) { |
440 | mutex_lock(&client->lock); | |
441 | ion_handle_add(client, handle); | |
442 | mutex_unlock(&client->lock); | |
443 | } | |
c30707be | 444 | |
29ae6bc7 | 445 | |
c30707be RSZ |
446 | return handle; |
447 | } | |
ee4c8aa9 | 448 | EXPORT_SYMBOL(ion_alloc); |
c30707be RSZ |
449 | |
450 | void ion_free(struct ion_client *client, struct ion_handle *handle) | |
451 | { | |
452 | bool valid_handle; | |
453 | ||
454 | BUG_ON(client != handle->client); | |
455 | ||
456 | mutex_lock(&client->lock); | |
457 | valid_handle = ion_handle_validate(client, handle); | |
c30707be RSZ |
458 | |
459 | if (!valid_handle) { | |
a9bb075d | 460 | WARN(1, "%s: invalid handle passed to free.\n", __func__); |
37bdbf00 | 461 | mutex_unlock(&client->lock); |
c30707be RSZ |
462 | return; |
463 | } | |
464 | ion_handle_put(handle); | |
0e9c03a5 | 465 | mutex_unlock(&client->lock); |
c30707be | 466 | } |
ee4c8aa9 | 467 | EXPORT_SYMBOL(ion_free); |
c30707be | 468 | |
c30707be RSZ |
469 | int ion_phys(struct ion_client *client, struct ion_handle *handle, |
470 | ion_phys_addr_t *addr, size_t *len) | |
471 | { | |
472 | struct ion_buffer *buffer; | |
473 | int ret; | |
474 | ||
475 | mutex_lock(&client->lock); | |
476 | if (!ion_handle_validate(client, handle)) { | |
477 | mutex_unlock(&client->lock); | |
478 | return -EINVAL; | |
479 | } | |
480 | ||
481 | buffer = handle->buffer; | |
482 | ||
483 | if (!buffer->heap->ops->phys) { | |
484 | pr_err("%s: ion_phys is not implemented by this heap.\n", | |
485 | __func__); | |
486 | mutex_unlock(&client->lock); | |
487 | return -ENODEV; | |
488 | } | |
489 | mutex_unlock(&client->lock); | |
490 | ret = buffer->heap->ops->phys(buffer->heap, buffer, addr, len); | |
491 | return ret; | |
492 | } | |
ee4c8aa9 | 493 | EXPORT_SYMBOL(ion_phys); |
c30707be | 494 | |
0f34faf8 RSZ |
495 | static void *ion_buffer_kmap_get(struct ion_buffer *buffer) |
496 | { | |
497 | void *vaddr; | |
498 | ||
499 | if (buffer->kmap_cnt) { | |
500 | buffer->kmap_cnt++; | |
501 | return buffer->vaddr; | |
502 | } | |
503 | vaddr = buffer->heap->ops->map_kernel(buffer->heap, buffer); | |
504 | if (IS_ERR_OR_NULL(vaddr)) | |
505 | return vaddr; | |
506 | buffer->vaddr = vaddr; | |
507 | buffer->kmap_cnt++; | |
508 | return vaddr; | |
509 | } | |
510 | ||
b892bf75 | 511 | static void *ion_handle_kmap_get(struct ion_handle *handle) |
c30707be | 512 | { |
b892bf75 | 513 | struct ion_buffer *buffer = handle->buffer; |
c30707be RSZ |
514 | void *vaddr; |
515 | ||
b892bf75 RSZ |
516 | if (handle->kmap_cnt) { |
517 | handle->kmap_cnt++; | |
518 | return buffer->vaddr; | |
c30707be | 519 | } |
0f34faf8 RSZ |
520 | vaddr = ion_buffer_kmap_get(buffer); |
521 | if (IS_ERR_OR_NULL(vaddr)) | |
b892bf75 | 522 | return vaddr; |
b892bf75 | 523 | handle->kmap_cnt++; |
b892bf75 RSZ |
524 | return vaddr; |
525 | } | |
c30707be | 526 | |
0f34faf8 RSZ |
527 | static void ion_buffer_kmap_put(struct ion_buffer *buffer) |
528 | { | |
529 | buffer->kmap_cnt--; | |
530 | if (!buffer->kmap_cnt) { | |
531 | buffer->heap->ops->unmap_kernel(buffer->heap, buffer); | |
532 | buffer->vaddr = NULL; | |
533 | } | |
534 | } | |
535 | ||
b892bf75 RSZ |
536 | static void ion_handle_kmap_put(struct ion_handle *handle) |
537 | { | |
538 | struct ion_buffer *buffer = handle->buffer; | |
539 | ||
540 | handle->kmap_cnt--; | |
541 | if (!handle->kmap_cnt) | |
0f34faf8 | 542 | ion_buffer_kmap_put(buffer); |
c30707be RSZ |
543 | } |
544 | ||
b892bf75 | 545 | void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle) |
c30707be RSZ |
546 | { |
547 | struct ion_buffer *buffer; | |
b892bf75 | 548 | void *vaddr; |
c30707be RSZ |
549 | |
550 | mutex_lock(&client->lock); | |
551 | if (!ion_handle_validate(client, handle)) { | |
b892bf75 | 552 | pr_err("%s: invalid handle passed to map_kernel.\n", |
c30707be RSZ |
553 | __func__); |
554 | mutex_unlock(&client->lock); | |
555 | return ERR_PTR(-EINVAL); | |
556 | } | |
b892bf75 | 557 | |
c30707be | 558 | buffer = handle->buffer; |
c30707be | 559 | |
b892bf75 | 560 | if (!handle->buffer->heap->ops->map_kernel) { |
c30707be RSZ |
561 | pr_err("%s: map_kernel is not implemented by this heap.\n", |
562 | __func__); | |
c30707be RSZ |
563 | mutex_unlock(&client->lock); |
564 | return ERR_PTR(-ENODEV); | |
565 | } | |
c30707be | 566 | |
c30707be | 567 | mutex_lock(&buffer->lock); |
b892bf75 | 568 | vaddr = ion_handle_kmap_get(handle); |
c30707be RSZ |
569 | mutex_unlock(&buffer->lock); |
570 | mutex_unlock(&client->lock); | |
b892bf75 | 571 | return vaddr; |
c30707be | 572 | } |
ee4c8aa9 | 573 | EXPORT_SYMBOL(ion_map_kernel); |
c30707be | 574 | |
b892bf75 | 575 | void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle) |
c30707be RSZ |
576 | { |
577 | struct ion_buffer *buffer; | |
578 | ||
579 | mutex_lock(&client->lock); | |
580 | buffer = handle->buffer; | |
581 | mutex_lock(&buffer->lock); | |
b892bf75 | 582 | ion_handle_kmap_put(handle); |
c30707be RSZ |
583 | mutex_unlock(&buffer->lock); |
584 | mutex_unlock(&client->lock); | |
585 | } | |
ee4c8aa9 | 586 | EXPORT_SYMBOL(ion_unmap_kernel); |
c30707be | 587 | |
c30707be RSZ |
588 | static int ion_debug_client_show(struct seq_file *s, void *unused) |
589 | { | |
590 | struct ion_client *client = s->private; | |
591 | struct rb_node *n; | |
592 | size_t sizes[ION_NUM_HEAPS] = {0}; | |
593 | const char *names[ION_NUM_HEAPS] = {0}; | |
594 | int i; | |
595 | ||
596 | mutex_lock(&client->lock); | |
597 | for (n = rb_first(&client->handles); n; n = rb_next(n)) { | |
598 | struct ion_handle *handle = rb_entry(n, struct ion_handle, | |
599 | node); | |
600 | enum ion_heap_type type = handle->buffer->heap->type; | |
601 | ||
602 | if (!names[type]) | |
603 | names[type] = handle->buffer->heap->name; | |
604 | sizes[type] += handle->buffer->size; | |
605 | } | |
606 | mutex_unlock(&client->lock); | |
607 | ||
608 | seq_printf(s, "%16.16s: %16.16s\n", "heap_name", "size_in_bytes"); | |
609 | for (i = 0; i < ION_NUM_HEAPS; i++) { | |
610 | if (!names[i]) | |
611 | continue; | |
b892bf75 | 612 | seq_printf(s, "%16.16s: %16u\n", names[i], sizes[i]); |
c30707be RSZ |
613 | } |
614 | return 0; | |
615 | } | |
616 | ||
617 | static int ion_debug_client_open(struct inode *inode, struct file *file) | |
618 | { | |
619 | return single_open(file, ion_debug_client_show, inode->i_private); | |
620 | } | |
621 | ||
622 | static const struct file_operations debug_client_fops = { | |
623 | .open = ion_debug_client_open, | |
624 | .read = seq_read, | |
625 | .llseek = seq_lseek, | |
626 | .release = single_release, | |
627 | }; | |
628 | ||
c30707be RSZ |
629 | struct ion_client *ion_client_create(struct ion_device *dev, |
630 | unsigned int heap_mask, | |
631 | const char *name) | |
632 | { | |
633 | struct ion_client *client; | |
634 | struct task_struct *task; | |
635 | struct rb_node **p; | |
636 | struct rb_node *parent = NULL; | |
637 | struct ion_client *entry; | |
638 | char debug_name[64]; | |
639 | pid_t pid; | |
640 | ||
641 | get_task_struct(current->group_leader); | |
642 | task_lock(current->group_leader); | |
643 | pid = task_pid_nr(current->group_leader); | |
644 | /* don't bother to store task struct for kernel threads, | |
645 | they can't be killed anyway */ | |
646 | if (current->group_leader->flags & PF_KTHREAD) { | |
647 | put_task_struct(current->group_leader); | |
648 | task = NULL; | |
649 | } else { | |
650 | task = current->group_leader; | |
651 | } | |
652 | task_unlock(current->group_leader); | |
653 | ||
c30707be RSZ |
654 | client = kzalloc(sizeof(struct ion_client), GFP_KERNEL); |
655 | if (!client) { | |
54ac0784 KC |
656 | if (task) |
657 | put_task_struct(current->group_leader); | |
c30707be RSZ |
658 | return ERR_PTR(-ENOMEM); |
659 | } | |
660 | ||
661 | client->dev = dev; | |
662 | client->handles = RB_ROOT; | |
663 | mutex_init(&client->lock); | |
664 | client->name = name; | |
665 | client->heap_mask = heap_mask; | |
666 | client->task = task; | |
667 | client->pid = pid; | |
c30707be | 668 | |
8d7ab9a9 | 669 | down_write(&dev->lock); |
b892bf75 RSZ |
670 | p = &dev->clients.rb_node; |
671 | while (*p) { | |
672 | parent = *p; | |
673 | entry = rb_entry(parent, struct ion_client, node); | |
674 | ||
675 | if (client < entry) | |
676 | p = &(*p)->rb_left; | |
677 | else if (client > entry) | |
678 | p = &(*p)->rb_right; | |
c30707be | 679 | } |
b892bf75 RSZ |
680 | rb_link_node(&client->node, parent, p); |
681 | rb_insert_color(&client->node, &dev->clients); | |
c30707be RSZ |
682 | |
683 | snprintf(debug_name, 64, "%u", client->pid); | |
684 | client->debug_root = debugfs_create_file(debug_name, 0664, | |
685 | dev->debug_root, client, | |
686 | &debug_client_fops); | |
8d7ab9a9 | 687 | up_write(&dev->lock); |
c30707be RSZ |
688 | |
689 | return client; | |
690 | } | |
691 | ||
b892bf75 | 692 | void ion_client_destroy(struct ion_client *client) |
c30707be | 693 | { |
c30707be RSZ |
694 | struct ion_device *dev = client->dev; |
695 | struct rb_node *n; | |
696 | ||
697 | pr_debug("%s: %d\n", __func__, __LINE__); | |
698 | while ((n = rb_first(&client->handles))) { | |
699 | struct ion_handle *handle = rb_entry(n, struct ion_handle, | |
700 | node); | |
701 | ion_handle_destroy(&handle->ref); | |
702 | } | |
8d7ab9a9 | 703 | down_write(&dev->lock); |
b892bf75 | 704 | if (client->task) |
c30707be | 705 | put_task_struct(client->task); |
b892bf75 | 706 | rb_erase(&client->node, &dev->clients); |
c30707be | 707 | debugfs_remove_recursive(client->debug_root); |
8d7ab9a9 | 708 | up_write(&dev->lock); |
c30707be RSZ |
709 | |
710 | kfree(client); | |
711 | } | |
ee4c8aa9 | 712 | EXPORT_SYMBOL(ion_client_destroy); |
c30707be | 713 | |
ce1f147a RSZ |
714 | struct sg_table *ion_sg_table(struct ion_client *client, |
715 | struct ion_handle *handle) | |
c30707be | 716 | { |
29ae6bc7 | 717 | struct ion_buffer *buffer; |
b892bf75 | 718 | struct sg_table *table; |
c30707be | 719 | |
29ae6bc7 RSZ |
720 | mutex_lock(&client->lock); |
721 | if (!ion_handle_validate(client, handle)) { | |
722 | pr_err("%s: invalid handle passed to map_dma.\n", | |
b892bf75 | 723 | __func__); |
29ae6bc7 RSZ |
724 | mutex_unlock(&client->lock); |
725 | return ERR_PTR(-EINVAL); | |
54ac0784 | 726 | } |
29ae6bc7 RSZ |
727 | buffer = handle->buffer; |
728 | table = buffer->sg_table; | |
729 | mutex_unlock(&client->lock); | |
b892bf75 | 730 | return table; |
c30707be | 731 | } |
ee4c8aa9 | 732 | EXPORT_SYMBOL(ion_sg_table); |
c30707be | 733 | |
56a7c185 RSZ |
734 | static void ion_buffer_sync_for_device(struct ion_buffer *buffer, |
735 | struct device *dev, | |
736 | enum dma_data_direction direction); | |
737 | ||
29ae6bc7 RSZ |
738 | static struct sg_table *ion_map_dma_buf(struct dma_buf_attachment *attachment, |
739 | enum dma_data_direction direction) | |
c30707be | 740 | { |
b892bf75 RSZ |
741 | struct dma_buf *dmabuf = attachment->dmabuf; |
742 | struct ion_buffer *buffer = dmabuf->priv; | |
c30707be | 743 | |
0b9ec1cf | 744 | ion_buffer_sync_for_device(buffer, attachment->dev, direction); |
29ae6bc7 RSZ |
745 | return buffer->sg_table; |
746 | } | |
747 | ||
748 | static void ion_unmap_dma_buf(struct dma_buf_attachment *attachment, | |
749 | struct sg_table *table, | |
750 | enum dma_data_direction direction) | |
751 | { | |
c30707be RSZ |
752 | } |
753 | ||
56a7c185 RSZ |
754 | static int ion_buffer_alloc_dirty(struct ion_buffer *buffer) |
755 | { | |
756 | unsigned long pages = buffer->sg_table->nents; | |
757 | unsigned long length = (pages + BITS_PER_LONG - 1)/BITS_PER_LONG; | |
758 | ||
759 | buffer->dirty = kzalloc(length * sizeof(unsigned long), GFP_KERNEL); | |
760 | if (!buffer->dirty) | |
761 | return -ENOMEM; | |
762 | return 0; | |
763 | } | |
764 | ||
765 | struct ion_vma_list { | |
766 | struct list_head list; | |
767 | struct vm_area_struct *vma; | |
768 | }; | |
769 | ||
770 | static void ion_buffer_sync_for_device(struct ion_buffer *buffer, | |
771 | struct device *dev, | |
772 | enum dma_data_direction dir) | |
773 | { | |
774 | struct scatterlist *sg; | |
775 | int i; | |
776 | struct ion_vma_list *vma_list; | |
777 | ||
778 | pr_debug("%s: syncing for device %s\n", __func__, | |
779 | dev ? dev_name(dev) : "null"); | |
0b9ec1cf | 780 | |
13ba7805 | 781 | if (!ion_buffer_fault_user_mappings(buffer)) |
0b9ec1cf RSZ |
782 | return; |
783 | ||
56a7c185 RSZ |
784 | mutex_lock(&buffer->lock); |
785 | for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i) { | |
786 | if (!test_bit(i, buffer->dirty)) | |
787 | continue; | |
788 | dma_sync_sg_for_device(dev, sg, 1, dir); | |
789 | clear_bit(i, buffer->dirty); | |
790 | } | |
791 | list_for_each_entry(vma_list, &buffer->vmas, list) { | |
792 | struct vm_area_struct *vma = vma_list->vma; | |
793 | ||
794 | zap_page_range(vma, vma->vm_start, vma->vm_end - vma->vm_start, | |
795 | NULL); | |
796 | } | |
797 | mutex_unlock(&buffer->lock); | |
798 | } | |
799 | ||
800 | int ion_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
801 | { | |
802 | struct ion_buffer *buffer = vma->vm_private_data; | |
803 | struct scatterlist *sg; | |
804 | int i; | |
805 | ||
806 | mutex_lock(&buffer->lock); | |
807 | set_bit(vmf->pgoff, buffer->dirty); | |
808 | ||
809 | for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i) { | |
810 | if (i != vmf->pgoff) | |
811 | continue; | |
812 | dma_sync_sg_for_cpu(NULL, sg, 1, DMA_BIDIRECTIONAL); | |
813 | vm_insert_page(vma, (unsigned long)vmf->virtual_address, | |
814 | sg_page(sg)); | |
815 | break; | |
816 | } | |
817 | mutex_unlock(&buffer->lock); | |
818 | return VM_FAULT_NOPAGE; | |
819 | } | |
820 | ||
821 | static void ion_vm_open(struct vm_area_struct *vma) | |
822 | { | |
823 | struct ion_buffer *buffer = vma->vm_private_data; | |
824 | struct ion_vma_list *vma_list; | |
825 | ||
826 | vma_list = kmalloc(sizeof(struct ion_vma_list), GFP_KERNEL); | |
827 | if (!vma_list) | |
828 | return; | |
829 | vma_list->vma = vma; | |
830 | mutex_lock(&buffer->lock); | |
831 | list_add(&vma_list->list, &buffer->vmas); | |
832 | mutex_unlock(&buffer->lock); | |
833 | pr_debug("%s: adding %p\n", __func__, vma); | |
834 | } | |
835 | ||
836 | static void ion_vm_close(struct vm_area_struct *vma) | |
837 | { | |
838 | struct ion_buffer *buffer = vma->vm_private_data; | |
839 | struct ion_vma_list *vma_list, *tmp; | |
840 | ||
841 | pr_debug("%s\n", __func__); | |
842 | mutex_lock(&buffer->lock); | |
843 | list_for_each_entry_safe(vma_list, tmp, &buffer->vmas, list) { | |
844 | if (vma_list->vma != vma) | |
845 | continue; | |
846 | list_del(&vma_list->list); | |
847 | kfree(vma_list); | |
848 | pr_debug("%s: deleting %p\n", __func__, vma); | |
849 | break; | |
850 | } | |
851 | mutex_unlock(&buffer->lock); | |
852 | } | |
853 | ||
854 | struct vm_operations_struct ion_vma_ops = { | |
855 | .open = ion_vm_open, | |
856 | .close = ion_vm_close, | |
857 | .fault = ion_vm_fault, | |
858 | }; | |
859 | ||
b892bf75 | 860 | static int ion_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma) |
c30707be | 861 | { |
b892bf75 | 862 | struct ion_buffer *buffer = dmabuf->priv; |
56a7c185 | 863 | int ret = 0; |
c30707be | 864 | |
b892bf75 | 865 | if (!buffer->heap->ops->map_user) { |
c30707be RSZ |
866 | pr_err("%s: this heap does not define a method for mapping " |
867 | "to userspace\n", __func__); | |
b892bf75 | 868 | return -EINVAL; |
c30707be RSZ |
869 | } |
870 | ||
13ba7805 | 871 | if (ion_buffer_fault_user_mappings(buffer)) { |
56a7c185 RSZ |
872 | vma->vm_private_data = buffer; |
873 | vma->vm_ops = &ion_vma_ops; | |
874 | ion_vm_open(vma); | |
856661d5 | 875 | return 0; |
56a7c185 | 876 | } |
b892bf75 | 877 | |
856661d5 RSZ |
878 | if (!(buffer->flags & ION_FLAG_CACHED)) |
879 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
880 | ||
881 | mutex_lock(&buffer->lock); | |
882 | /* now map it to userspace */ | |
883 | ret = buffer->heap->ops->map_user(buffer->heap, buffer, vma); | |
884 | mutex_unlock(&buffer->lock); | |
885 | ||
b892bf75 | 886 | if (ret) |
c30707be RSZ |
887 | pr_err("%s: failure mapping buffer to userspace\n", |
888 | __func__); | |
c30707be | 889 | |
c30707be RSZ |
890 | return ret; |
891 | } | |
892 | ||
b892bf75 RSZ |
893 | static void ion_dma_buf_release(struct dma_buf *dmabuf) |
894 | { | |
895 | struct ion_buffer *buffer = dmabuf->priv; | |
896 | ion_buffer_put(buffer); | |
897 | } | |
c30707be | 898 | |
b892bf75 | 899 | static void *ion_dma_buf_kmap(struct dma_buf *dmabuf, unsigned long offset) |
c30707be | 900 | { |
0f34faf8 | 901 | struct ion_buffer *buffer = dmabuf->priv; |
12edf53d | 902 | return buffer->vaddr + offset * PAGE_SIZE; |
b892bf75 | 903 | } |
c30707be | 904 | |
b892bf75 RSZ |
905 | static void ion_dma_buf_kunmap(struct dma_buf *dmabuf, unsigned long offset, |
906 | void *ptr) | |
907 | { | |
908 | return; | |
909 | } | |
910 | ||
0f34faf8 RSZ |
911 | static int ion_dma_buf_begin_cpu_access(struct dma_buf *dmabuf, size_t start, |
912 | size_t len, | |
913 | enum dma_data_direction direction) | |
b892bf75 | 914 | { |
0f34faf8 RSZ |
915 | struct ion_buffer *buffer = dmabuf->priv; |
916 | void *vaddr; | |
917 | ||
918 | if (!buffer->heap->ops->map_kernel) { | |
919 | pr_err("%s: map kernel is not implemented by this heap.\n", | |
920 | __func__); | |
921 | return -ENODEV; | |
922 | } | |
923 | ||
924 | mutex_lock(&buffer->lock); | |
925 | vaddr = ion_buffer_kmap_get(buffer); | |
926 | mutex_unlock(&buffer->lock); | |
927 | if (IS_ERR(vaddr)) | |
928 | return PTR_ERR(vaddr); | |
929 | if (!vaddr) | |
930 | return -ENOMEM; | |
931 | return 0; | |
b892bf75 RSZ |
932 | } |
933 | ||
0f34faf8 RSZ |
934 | static void ion_dma_buf_end_cpu_access(struct dma_buf *dmabuf, size_t start, |
935 | size_t len, | |
936 | enum dma_data_direction direction) | |
b892bf75 | 937 | { |
0f34faf8 | 938 | struct ion_buffer *buffer = dmabuf->priv; |
c30707be | 939 | |
0f34faf8 RSZ |
940 | mutex_lock(&buffer->lock); |
941 | ion_buffer_kmap_put(buffer); | |
942 | mutex_unlock(&buffer->lock); | |
943 | } | |
c30707be | 944 | |
b892bf75 RSZ |
945 | struct dma_buf_ops dma_buf_ops = { |
946 | .map_dma_buf = ion_map_dma_buf, | |
947 | .unmap_dma_buf = ion_unmap_dma_buf, | |
948 | .mmap = ion_mmap, | |
949 | .release = ion_dma_buf_release, | |
0f34faf8 RSZ |
950 | .begin_cpu_access = ion_dma_buf_begin_cpu_access, |
951 | .end_cpu_access = ion_dma_buf_end_cpu_access, | |
952 | .kmap_atomic = ion_dma_buf_kmap, | |
953 | .kunmap_atomic = ion_dma_buf_kunmap, | |
b892bf75 RSZ |
954 | .kmap = ion_dma_buf_kmap, |
955 | .kunmap = ion_dma_buf_kunmap, | |
956 | }; | |
957 | ||
958 | int ion_share_dma_buf(struct ion_client *client, struct ion_handle *handle) | |
959 | { | |
960 | struct ion_buffer *buffer; | |
961 | struct dma_buf *dmabuf; | |
962 | bool valid_handle; | |
963 | int fd; | |
964 | ||
965 | mutex_lock(&client->lock); | |
966 | valid_handle = ion_handle_validate(client, handle); | |
967 | mutex_unlock(&client->lock); | |
968 | if (!valid_handle) { | |
a9bb075d | 969 | WARN(1, "%s: invalid handle passed to share.\n", __func__); |
b892bf75 RSZ |
970 | return -EINVAL; |
971 | } | |
972 | ||
973 | buffer = handle->buffer; | |
974 | ion_buffer_get(buffer); | |
975 | dmabuf = dma_buf_export(buffer, &dma_buf_ops, buffer->size, O_RDWR); | |
976 | if (IS_ERR(dmabuf)) { | |
977 | ion_buffer_put(buffer); | |
978 | return PTR_ERR(dmabuf); | |
979 | } | |
980 | fd = dma_buf_fd(dmabuf, O_CLOEXEC); | |
55808b8d | 981 | if (fd < 0) |
b892bf75 | 982 | dma_buf_put(dmabuf); |
55808b8d | 983 | |
c30707be | 984 | return fd; |
b892bf75 | 985 | } |
ee4c8aa9 | 986 | EXPORT_SYMBOL(ion_share_dma_buf); |
c30707be | 987 | |
b892bf75 RSZ |
988 | struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd) |
989 | { | |
990 | struct dma_buf *dmabuf; | |
991 | struct ion_buffer *buffer; | |
992 | struct ion_handle *handle; | |
993 | ||
994 | dmabuf = dma_buf_get(fd); | |
995 | if (IS_ERR_OR_NULL(dmabuf)) | |
996 | return ERR_PTR(PTR_ERR(dmabuf)); | |
997 | /* if this memory came from ion */ | |
998 | ||
999 | if (dmabuf->ops != &dma_buf_ops) { | |
1000 | pr_err("%s: can not import dmabuf from another exporter\n", | |
1001 | __func__); | |
1002 | dma_buf_put(dmabuf); | |
1003 | return ERR_PTR(-EINVAL); | |
1004 | } | |
1005 | buffer = dmabuf->priv; | |
1006 | ||
1007 | mutex_lock(&client->lock); | |
1008 | /* if a handle exists for this buffer just take a reference to it */ | |
1009 | handle = ion_handle_lookup(client, buffer); | |
1010 | if (!IS_ERR_OR_NULL(handle)) { | |
1011 | ion_handle_get(handle); | |
1012 | goto end; | |
1013 | } | |
1014 | handle = ion_handle_create(client, buffer); | |
1015 | if (IS_ERR_OR_NULL(handle)) | |
1016 | goto end; | |
1017 | ion_handle_add(client, handle); | |
1018 | end: | |
1019 | mutex_unlock(&client->lock); | |
1020 | dma_buf_put(dmabuf); | |
1021 | return handle; | |
c30707be | 1022 | } |
ee4c8aa9 | 1023 | EXPORT_SYMBOL(ion_import_dma_buf); |
c30707be | 1024 | |
0b9ec1cf RSZ |
1025 | static int ion_sync_for_device(struct ion_client *client, int fd) |
1026 | { | |
1027 | struct dma_buf *dmabuf; | |
1028 | struct ion_buffer *buffer; | |
1029 | ||
1030 | dmabuf = dma_buf_get(fd); | |
1031 | if (IS_ERR_OR_NULL(dmabuf)) | |
1032 | return PTR_ERR(dmabuf); | |
1033 | ||
1034 | /* if this memory came from ion */ | |
1035 | if (dmabuf->ops != &dma_buf_ops) { | |
1036 | pr_err("%s: can not sync dmabuf from another exporter\n", | |
1037 | __func__); | |
1038 | dma_buf_put(dmabuf); | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | buffer = dmabuf->priv; | |
856661d5 RSZ |
1042 | |
1043 | dma_sync_sg_for_device(NULL, buffer->sg_table->sgl, | |
1044 | buffer->sg_table->nents, DMA_BIDIRECTIONAL); | |
0b9ec1cf RSZ |
1045 | dma_buf_put(dmabuf); |
1046 | return 0; | |
1047 | } | |
1048 | ||
c30707be RSZ |
1049 | static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
1050 | { | |
1051 | struct ion_client *client = filp->private_data; | |
1052 | ||
1053 | switch (cmd) { | |
1054 | case ION_IOC_ALLOC: | |
1055 | { | |
1056 | struct ion_allocation_data data; | |
1057 | ||
1058 | if (copy_from_user(&data, (void __user *)arg, sizeof(data))) | |
1059 | return -EFAULT; | |
1060 | data.handle = ion_alloc(client, data.len, data.align, | |
56a7c185 | 1061 | data.heap_mask, data.flags); |
54ac0784 KC |
1062 | |
1063 | if (IS_ERR(data.handle)) | |
1064 | return PTR_ERR(data.handle); | |
1065 | ||
1066 | if (copy_to_user((void __user *)arg, &data, sizeof(data))) { | |
1067 | ion_free(client, data.handle); | |
c30707be | 1068 | return -EFAULT; |
54ac0784 | 1069 | } |
c30707be RSZ |
1070 | break; |
1071 | } | |
1072 | case ION_IOC_FREE: | |
1073 | { | |
1074 | struct ion_handle_data data; | |
1075 | bool valid; | |
1076 | ||
1077 | if (copy_from_user(&data, (void __user *)arg, | |
1078 | sizeof(struct ion_handle_data))) | |
1079 | return -EFAULT; | |
1080 | mutex_lock(&client->lock); | |
1081 | valid = ion_handle_validate(client, data.handle); | |
1082 | mutex_unlock(&client->lock); | |
1083 | if (!valid) | |
1084 | return -EINVAL; | |
1085 | ion_free(client, data.handle); | |
1086 | break; | |
1087 | } | |
c30707be RSZ |
1088 | case ION_IOC_SHARE: |
1089 | { | |
1090 | struct ion_fd_data data; | |
1091 | ||
1092 | if (copy_from_user(&data, (void __user *)arg, sizeof(data))) | |
1093 | return -EFAULT; | |
b892bf75 | 1094 | data.fd = ion_share_dma_buf(client, data.handle); |
c30707be RSZ |
1095 | if (copy_to_user((void __user *)arg, &data, sizeof(data))) |
1096 | return -EFAULT; | |
a1c6b996 OH |
1097 | if (data.fd < 0) |
1098 | return data.fd; | |
c30707be RSZ |
1099 | break; |
1100 | } | |
1101 | case ION_IOC_IMPORT: | |
1102 | { | |
1103 | struct ion_fd_data data; | |
a1c6b996 | 1104 | int ret = 0; |
c30707be RSZ |
1105 | if (copy_from_user(&data, (void __user *)arg, |
1106 | sizeof(struct ion_fd_data))) | |
1107 | return -EFAULT; | |
b892bf75 | 1108 | data.handle = ion_import_dma_buf(client, data.fd); |
a1c6b996 OH |
1109 | if (IS_ERR(data.handle)) { |
1110 | ret = PTR_ERR(data.handle); | |
c30707be | 1111 | data.handle = NULL; |
a1c6b996 | 1112 | } |
c30707be RSZ |
1113 | if (copy_to_user((void __user *)arg, &data, |
1114 | sizeof(struct ion_fd_data))) | |
1115 | return -EFAULT; | |
a1c6b996 OH |
1116 | if (ret < 0) |
1117 | return ret; | |
c30707be RSZ |
1118 | break; |
1119 | } | |
0b9ec1cf RSZ |
1120 | case ION_IOC_SYNC: |
1121 | { | |
1122 | struct ion_fd_data data; | |
1123 | if (copy_from_user(&data, (void __user *)arg, | |
1124 | sizeof(struct ion_fd_data))) | |
1125 | return -EFAULT; | |
1126 | ion_sync_for_device(client, data.fd); | |
1127 | break; | |
1128 | } | |
c30707be RSZ |
1129 | case ION_IOC_CUSTOM: |
1130 | { | |
1131 | struct ion_device *dev = client->dev; | |
1132 | struct ion_custom_data data; | |
1133 | ||
1134 | if (!dev->custom_ioctl) | |
1135 | return -ENOTTY; | |
1136 | if (copy_from_user(&data, (void __user *)arg, | |
1137 | sizeof(struct ion_custom_data))) | |
1138 | return -EFAULT; | |
1139 | return dev->custom_ioctl(client, data.cmd, data.arg); | |
1140 | } | |
1141 | default: | |
1142 | return -ENOTTY; | |
1143 | } | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | static int ion_release(struct inode *inode, struct file *file) | |
1148 | { | |
1149 | struct ion_client *client = file->private_data; | |
1150 | ||
1151 | pr_debug("%s: %d\n", __func__, __LINE__); | |
b892bf75 | 1152 | ion_client_destroy(client); |
c30707be RSZ |
1153 | return 0; |
1154 | } | |
1155 | ||
1156 | static int ion_open(struct inode *inode, struct file *file) | |
1157 | { | |
1158 | struct miscdevice *miscdev = file->private_data; | |
1159 | struct ion_device *dev = container_of(miscdev, struct ion_device, dev); | |
1160 | struct ion_client *client; | |
1161 | ||
1162 | pr_debug("%s: %d\n", __func__, __LINE__); | |
1163 | client = ion_client_create(dev, -1, "user"); | |
1164 | if (IS_ERR_OR_NULL(client)) | |
1165 | return PTR_ERR(client); | |
1166 | file->private_data = client; | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | static const struct file_operations ion_fops = { | |
1172 | .owner = THIS_MODULE, | |
1173 | .open = ion_open, | |
1174 | .release = ion_release, | |
1175 | .unlocked_ioctl = ion_ioctl, | |
1176 | }; | |
1177 | ||
1178 | static size_t ion_debug_heap_total(struct ion_client *client, | |
1179 | enum ion_heap_type type) | |
1180 | { | |
1181 | size_t size = 0; | |
1182 | struct rb_node *n; | |
1183 | ||
1184 | mutex_lock(&client->lock); | |
1185 | for (n = rb_first(&client->handles); n; n = rb_next(n)) { | |
1186 | struct ion_handle *handle = rb_entry(n, | |
1187 | struct ion_handle, | |
1188 | node); | |
1189 | if (handle->buffer->heap->type == type) | |
1190 | size += handle->buffer->size; | |
1191 | } | |
1192 | mutex_unlock(&client->lock); | |
1193 | return size; | |
1194 | } | |
1195 | ||
1196 | static int ion_debug_heap_show(struct seq_file *s, void *unused) | |
1197 | { | |
1198 | struct ion_heap *heap = s->private; | |
1199 | struct ion_device *dev = heap->dev; | |
1200 | struct rb_node *n; | |
5ad7bc3a RSZ |
1201 | size_t total_size = 0; |
1202 | size_t total_orphaned_size = 0; | |
c30707be RSZ |
1203 | |
1204 | seq_printf(s, "%16.s %16.s %16.s\n", "client", "pid", "size"); | |
5ad7bc3a | 1205 | seq_printf(s, "----------------------------------------------------\n"); |
c30707be | 1206 | |
b892bf75 | 1207 | for (n = rb_first(&dev->clients); n; n = rb_next(n)) { |
c30707be RSZ |
1208 | struct ion_client *client = rb_entry(n, struct ion_client, |
1209 | node); | |
1210 | size_t size = ion_debug_heap_total(client, heap->type); | |
1211 | if (!size) | |
1212 | continue; | |
b892bf75 RSZ |
1213 | if (client->task) { |
1214 | char task_comm[TASK_COMM_LEN]; | |
1215 | ||
1216 | get_task_comm(task_comm, client->task); | |
1217 | seq_printf(s, "%16.s %16u %16u\n", task_comm, | |
1218 | client->pid, size); | |
1219 | } else { | |
1220 | seq_printf(s, "%16.s %16u %16u\n", client->name, | |
1221 | client->pid, size); | |
1222 | } | |
c30707be | 1223 | } |
5ad7bc3a RSZ |
1224 | seq_printf(s, "----------------------------------------------------\n"); |
1225 | seq_printf(s, "orphaned allocations (info is from last known client):" | |
1226 | "\n"); | |
8d7ab9a9 | 1227 | mutex_lock(&dev->buffer_lock); |
5ad7bc3a RSZ |
1228 | for (n = rb_first(&dev->buffers); n; n = rb_next(n)) { |
1229 | struct ion_buffer *buffer = rb_entry(n, struct ion_buffer, | |
1230 | node); | |
45b17a80 RSZ |
1231 | if (buffer->heap->type != heap->type) |
1232 | continue; | |
1233 | total_size += buffer->size; | |
5ad7bc3a | 1234 | if (!buffer->handle_count) { |
45b17a80 RSZ |
1235 | seq_printf(s, "%16.s %16u %16u %d %d\n", buffer->task_comm, |
1236 | buffer->pid, buffer->size, buffer->kmap_cnt, buffer->ref); | |
5ad7bc3a RSZ |
1237 | total_orphaned_size += buffer->size; |
1238 | } | |
1239 | } | |
8d7ab9a9 | 1240 | mutex_unlock(&dev->buffer_lock); |
5ad7bc3a RSZ |
1241 | seq_printf(s, "----------------------------------------------------\n"); |
1242 | seq_printf(s, "%16.s %16u\n", "total orphaned", | |
1243 | total_orphaned_size); | |
1244 | seq_printf(s, "%16.s %16u\n", "total ", total_size); | |
45b17a80 RSZ |
1245 | seq_printf(s, "----------------------------------------------------\n"); |
1246 | ||
1247 | if (heap->debug_show) | |
1248 | heap->debug_show(heap, s, unused); | |
5ad7bc3a | 1249 | |
c30707be RSZ |
1250 | return 0; |
1251 | } | |
1252 | ||
1253 | static int ion_debug_heap_open(struct inode *inode, struct file *file) | |
1254 | { | |
1255 | return single_open(file, ion_debug_heap_show, inode->i_private); | |
1256 | } | |
1257 | ||
1258 | static const struct file_operations debug_heap_fops = { | |
1259 | .open = ion_debug_heap_open, | |
1260 | .read = seq_read, | |
1261 | .llseek = seq_lseek, | |
1262 | .release = single_release, | |
1263 | }; | |
1264 | ||
1265 | void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap) | |
1266 | { | |
1267 | struct rb_node **p = &dev->heaps.rb_node; | |
1268 | struct rb_node *parent = NULL; | |
1269 | struct ion_heap *entry; | |
1270 | ||
29ae6bc7 RSZ |
1271 | if (!heap->ops->allocate || !heap->ops->free || !heap->ops->map_dma || |
1272 | !heap->ops->unmap_dma) | |
1273 | pr_err("%s: can not add heap with invalid ops struct.\n", | |
1274 | __func__); | |
1275 | ||
c30707be | 1276 | heap->dev = dev; |
8d7ab9a9 | 1277 | down_write(&dev->lock); |
c30707be RSZ |
1278 | while (*p) { |
1279 | parent = *p; | |
1280 | entry = rb_entry(parent, struct ion_heap, node); | |
1281 | ||
1282 | if (heap->id < entry->id) { | |
1283 | p = &(*p)->rb_left; | |
1284 | } else if (heap->id > entry->id ) { | |
1285 | p = &(*p)->rb_right; | |
1286 | } else { | |
1287 | pr_err("%s: can not insert multiple heaps with " | |
1288 | "id %d\n", __func__, heap->id); | |
1289 | goto end; | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | rb_link_node(&heap->node, parent, p); | |
1294 | rb_insert_color(&heap->node, &dev->heaps); | |
1295 | debugfs_create_file(heap->name, 0664, dev->debug_root, heap, | |
1296 | &debug_heap_fops); | |
1297 | end: | |
8d7ab9a9 | 1298 | up_write(&dev->lock); |
c30707be RSZ |
1299 | } |
1300 | ||
1301 | struct ion_device *ion_device_create(long (*custom_ioctl) | |
1302 | (struct ion_client *client, | |
1303 | unsigned int cmd, | |
1304 | unsigned long arg)) | |
1305 | { | |
1306 | struct ion_device *idev; | |
1307 | int ret; | |
1308 | ||
1309 | idev = kzalloc(sizeof(struct ion_device), GFP_KERNEL); | |
1310 | if (!idev) | |
1311 | return ERR_PTR(-ENOMEM); | |
1312 | ||
1313 | idev->dev.minor = MISC_DYNAMIC_MINOR; | |
1314 | idev->dev.name = "ion"; | |
1315 | idev->dev.fops = &ion_fops; | |
1316 | idev->dev.parent = NULL; | |
1317 | ret = misc_register(&idev->dev); | |
1318 | if (ret) { | |
1319 | pr_err("ion: failed to register misc device.\n"); | |
1320 | return ERR_PTR(ret); | |
1321 | } | |
1322 | ||
1323 | idev->debug_root = debugfs_create_dir("ion", NULL); | |
1324 | if (IS_ERR_OR_NULL(idev->debug_root)) | |
1325 | pr_err("ion: failed to create debug files.\n"); | |
1326 | ||
1327 | idev->custom_ioctl = custom_ioctl; | |
1328 | idev->buffers = RB_ROOT; | |
8d7ab9a9 RSZ |
1329 | mutex_init(&idev->buffer_lock); |
1330 | init_rwsem(&idev->lock); | |
c30707be | 1331 | idev->heaps = RB_ROOT; |
b892bf75 | 1332 | idev->clients = RB_ROOT; |
c30707be RSZ |
1333 | return idev; |
1334 | } | |
1335 | ||
1336 | void ion_device_destroy(struct ion_device *dev) | |
1337 | { | |
1338 | misc_deregister(&dev->dev); | |
1339 | /* XXX need to free the heaps and clients ? */ | |
1340 | kfree(dev); | |
1341 | } | |
2991b7a0 RSZ |
1342 | |
1343 | void __init ion_reserve(struct ion_platform_data *data) | |
1344 | { | |
1345 | int i, ret; | |
1346 | ||
1347 | for (i = 0; i < data->nr; i++) { | |
1348 | if (data->heaps[i].size == 0) | |
1349 | continue; | |
1350 | ret = memblock_reserve(data->heaps[i].base, | |
1351 | data->heaps[i].size); | |
1352 | if (ret) | |
1353 | pr_err("memblock reserve of %x@%lx failed\n", | |
1354 | data->heaps[i].size, | |
1355 | data->heaps[i].base); | |
1356 | } | |
1357 | } |