blob: 6bb07393ff69d5f25ca0ab5de3ffd42f2984cf0d [file] [log] [blame]
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001/*
2 * drivers/gpu/ion/ion.c
3 *
4 * Copyright (C) 2011 Google, Inc.
Olav Haugan0a852512012-01-09 10:20:55 -08005 * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07006 *
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18#include <linux/device.h>
19#include <linux/file.h>
20#include <linux/fs.h>
21#include <linux/anon_inodes.h>
22#include <linux/ion.h>
23#include <linux/list.h>
24#include <linux/miscdevice.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>
33
Laura Abbott8c017362011-09-22 20:59:12 -070034#include <mach/iommu_domains.h>
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -070035#include "ion_priv.h"
36#define DEBUG
37
38/**
39 * struct ion_device - the metadata of the ion device node
40 * @dev: the actual misc device
41 * @buffers: an rb tree of all the existing buffers
42 * @lock: lock protecting the buffers & heaps trees
43 * @heaps: list of all the heaps in the system
44 * @user_clients: list of all the clients created from userspace
45 */
46struct ion_device {
47 struct miscdevice dev;
48 struct rb_root buffers;
49 struct mutex lock;
50 struct rb_root heaps;
51 long (*custom_ioctl) (struct ion_client *client, unsigned int cmd,
52 unsigned long arg);
53 struct rb_root user_clients;
54 struct rb_root kernel_clients;
55 struct dentry *debug_root;
56};
57
58/**
59 * struct ion_client - a process/hw block local address space
60 * @ref: for reference counting the client
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 */
73struct ion_client {
74 struct kref ref;
75 struct rb_node node;
76 struct ion_device *dev;
77 struct rb_root handles;
78 struct mutex lock;
79 unsigned int heap_mask;
Olav Haugan63e5f3b2012-01-11 16:42:37 -080080 char *name;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -070081 struct task_struct *task;
82 pid_t pid;
83 struct dentry *debug_root;
84};
85
86/**
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -070087 * ion_handle - a client local reference to a buffer
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -070088 * @ref: reference count
89 * @client: back pointer to the client the buffer resides in
90 * @buffer: pointer to the buffer
91 * @node: node in the client's handle rbtree
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -070092 * @kmap_cnt: count of times this client has mapped to kernel
93 * @dmap_cnt: count of times this client has mapped for dma
94 * @usermap_cnt: count of times this client has mapped for userspace
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -070095 *
96 * Modifications to node, map_cnt or mapping should be protected by the
97 * lock in the client. Other fields are never changed after initialization.
98 */
99struct ion_handle {
100 struct kref ref;
101 struct ion_client *client;
102 struct ion_buffer *buffer;
103 struct rb_node node;
104 unsigned int kmap_cnt;
105 unsigned int dmap_cnt;
106 unsigned int usermap_cnt;
Laura Abbott8c017362011-09-22 20:59:12 -0700107 unsigned int iommu_map_cnt;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700108};
109
Laura Abbott8c017362011-09-22 20:59:12 -0700110static int ion_validate_buffer_flags(struct ion_buffer *buffer,
111 unsigned long flags)
112{
113 if (buffer->kmap_cnt || buffer->dmap_cnt || buffer->umap_cnt ||
114 buffer->iommu_map_cnt) {
115 if (buffer->flags != flags) {
116 pr_err("%s: buffer was already mapped with flags %lx,"
117 " cannot map with flags %lx\n", __func__,
118 buffer->flags, flags);
119 return 1;
120 }
121
122 } else {
123 buffer->flags = flags;
124 }
125 return 0;
126}
127
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700128/* this function should only be called while dev->lock is held */
129static void ion_buffer_add(struct ion_device *dev,
130 struct ion_buffer *buffer)
131{
132 struct rb_node **p = &dev->buffers.rb_node;
133 struct rb_node *parent = NULL;
134 struct ion_buffer *entry;
135
136 while (*p) {
137 parent = *p;
138 entry = rb_entry(parent, struct ion_buffer, node);
139
Rebecca Schultz Zavinf9fb95e2011-06-30 18:09:05 -0700140 if (buffer < entry) {
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700141 p = &(*p)->rb_left;
Rebecca Schultz Zavinf9fb95e2011-06-30 18:09:05 -0700142 } else if (buffer > entry) {
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700143 p = &(*p)->rb_right;
Rebecca Schultz Zavinf9fb95e2011-06-30 18:09:05 -0700144 } else {
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700145 pr_err("%s: buffer already found.", __func__);
146 BUG();
Rebecca Schultz Zavinf9fb95e2011-06-30 18:09:05 -0700147 }
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700148 }
149
150 rb_link_node(&buffer->node, parent, p);
151 rb_insert_color(&buffer->node, &dev->buffers);
152}
153
Laura Abbott8c017362011-09-22 20:59:12 -0700154void ion_iommu_add(struct ion_buffer *buffer,
155 struct ion_iommu_map *iommu)
156{
157 struct rb_node **p = &buffer->iommu_maps.rb_node;
158 struct rb_node *parent = NULL;
159 struct ion_iommu_map *entry;
160
161 while (*p) {
162 parent = *p;
163 entry = rb_entry(parent, struct ion_iommu_map, node);
164
165 if (iommu->key < entry->key) {
166 p = &(*p)->rb_left;
167 } else if (iommu->key > entry->key) {
168 p = &(*p)->rb_right;
169 } else {
170 pr_err("%s: buffer %p already has mapping for domain %d"
171 " and partition %d\n", __func__,
172 buffer,
173 iommu_map_domain(iommu),
174 iommu_map_partition(iommu));
175 BUG();
176 }
177 }
178
179 rb_link_node(&iommu->node, parent, p);
180 rb_insert_color(&iommu->node, &buffer->iommu_maps);
181
182}
183
184static struct ion_iommu_map *ion_iommu_lookup(struct ion_buffer *buffer,
185 unsigned int domain_no,
186 unsigned int partition_no)
187{
188 struct rb_node **p = &buffer->iommu_maps.rb_node;
189 struct rb_node *parent = NULL;
190 struct ion_iommu_map *entry;
191 uint64_t key = domain_no;
192 key = key << 32 | partition_no;
193
194 while (*p) {
195 parent = *p;
196 entry = rb_entry(parent, struct ion_iommu_map, node);
197
198 if (key < entry->key)
199 p = &(*p)->rb_left;
200 else if (key > entry->key)
201 p = &(*p)->rb_right;
202 else
203 return entry;
204 }
205
206 return NULL;
207}
208
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700209/* this function should only be called while dev->lock is held */
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700210static struct ion_buffer *ion_buffer_create(struct ion_heap *heap,
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700211 struct ion_device *dev,
212 unsigned long len,
213 unsigned long align,
214 unsigned long flags)
215{
216 struct ion_buffer *buffer;
217 int ret;
218
219 buffer = kzalloc(sizeof(struct ion_buffer), GFP_KERNEL);
220 if (!buffer)
221 return ERR_PTR(-ENOMEM);
222
223 buffer->heap = heap;
224 kref_init(&buffer->ref);
225
226 ret = heap->ops->allocate(heap, buffer, len, align, flags);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700227 if (ret) {
228 kfree(buffer);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700229 return ERR_PTR(ret);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700230 }
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700231 buffer->dev = dev;
232 buffer->size = len;
233 mutex_init(&buffer->lock);
234 ion_buffer_add(dev, buffer);
235 return buffer;
236}
237
238static void ion_buffer_destroy(struct kref *kref)
239{
240 struct ion_buffer *buffer = container_of(kref, struct ion_buffer, ref);
241 struct ion_device *dev = buffer->dev;
242
243 buffer->heap->ops->free(buffer);
244 mutex_lock(&dev->lock);
245 rb_erase(&buffer->node, &dev->buffers);
246 mutex_unlock(&dev->lock);
247 kfree(buffer);
248}
249
250static void ion_buffer_get(struct ion_buffer *buffer)
251{
252 kref_get(&buffer->ref);
253}
254
255static int ion_buffer_put(struct ion_buffer *buffer)
256{
257 return kref_put(&buffer->ref, ion_buffer_destroy);
258}
259
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700260static struct ion_handle *ion_handle_create(struct ion_client *client,
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700261 struct ion_buffer *buffer)
262{
263 struct ion_handle *handle;
264
265 handle = kzalloc(sizeof(struct ion_handle), GFP_KERNEL);
266 if (!handle)
267 return ERR_PTR(-ENOMEM);
268 kref_init(&handle->ref);
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700269 rb_init_node(&handle->node);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700270 handle->client = client;
271 ion_buffer_get(buffer);
272 handle->buffer = buffer;
273
274 return handle;
275}
276
277static void ion_handle_destroy(struct kref *kref)
278{
279 struct ion_handle *handle = container_of(kref, struct ion_handle, ref);
280 /* XXX Can a handle be destroyed while it's map count is non-zero?:
281 if (handle->map_cnt) unmap
282 */
Laura Abbottd2a87372011-10-20 17:53:49 -0700283 WARN_ON(handle->kmap_cnt || handle->dmap_cnt || handle->usermap_cnt);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700284 ion_buffer_put(handle->buffer);
285 mutex_lock(&handle->client->lock);
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700286 if (!RB_EMPTY_NODE(&handle->node))
287 rb_erase(&handle->node, &handle->client->handles);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700288 mutex_unlock(&handle->client->lock);
289 kfree(handle);
290}
291
292struct ion_buffer *ion_handle_buffer(struct ion_handle *handle)
293{
294 return handle->buffer;
295}
296
297static void ion_handle_get(struct ion_handle *handle)
298{
299 kref_get(&handle->ref);
300}
301
302static int ion_handle_put(struct ion_handle *handle)
303{
304 return kref_put(&handle->ref, ion_handle_destroy);
305}
306
307static struct ion_handle *ion_handle_lookup(struct ion_client *client,
308 struct ion_buffer *buffer)
309{
310 struct rb_node *n;
311
312 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
313 struct ion_handle *handle = rb_entry(n, struct ion_handle,
314 node);
315 if (handle->buffer == buffer)
316 return handle;
317 }
318 return NULL;
319}
320
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700321static bool ion_handle_validate(struct ion_client *client, struct ion_handle *handle)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700322{
323 struct rb_node *n = client->handles.rb_node;
324
325 while (n) {
326 struct ion_handle *handle_node = rb_entry(n, struct ion_handle,
327 node);
328 if (handle < handle_node)
329 n = n->rb_left;
330 else if (handle > handle_node)
331 n = n->rb_right;
332 else
333 return true;
334 }
335 return false;
336}
337
338static void ion_handle_add(struct ion_client *client, struct ion_handle *handle)
339{
340 struct rb_node **p = &client->handles.rb_node;
341 struct rb_node *parent = NULL;
342 struct ion_handle *entry;
343
344 while (*p) {
345 parent = *p;
346 entry = rb_entry(parent, struct ion_handle, node);
347
348 if (handle < entry)
349 p = &(*p)->rb_left;
350 else if (handle > entry)
351 p = &(*p)->rb_right;
352 else
353 WARN(1, "%s: buffer already found.", __func__);
354 }
355
356 rb_link_node(&handle->node, parent, p);
357 rb_insert_color(&handle->node, &client->handles);
358}
359
360struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
361 size_t align, unsigned int flags)
362{
363 struct rb_node *n;
364 struct ion_handle *handle;
365 struct ion_device *dev = client->dev;
366 struct ion_buffer *buffer = NULL;
Olav Haugan0a852512012-01-09 10:20:55 -0800367 unsigned long secure_allocation = flags & ION_SECURE;
Olav Haugan35e2f2f2012-01-11 17:31:47 -0800368 const unsigned int MAX_DBG_STR_LEN = 64;
369 char dbg_str[MAX_DBG_STR_LEN];
370 unsigned int dbg_str_idx = 0;
371
372 dbg_str[0] = '\0';
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700373
374 /*
375 * traverse the list of heaps available in this system in priority
376 * order. If the heap type is supported by the client, and matches the
377 * request of the caller allocate from it. Repeat until allocate has
378 * succeeded or all heaps have been tried
379 */
380 mutex_lock(&dev->lock);
381 for (n = rb_first(&dev->heaps); n != NULL; n = rb_next(n)) {
382 struct ion_heap *heap = rb_entry(n, struct ion_heap, node);
383 /* if the client doesn't support this heap type */
384 if (!((1 << heap->type) & client->heap_mask))
385 continue;
386 /* if the caller didn't specify this heap type */
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700387 if (!((1 << heap->id) & flags))
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700388 continue;
Olav Haugan0a852512012-01-09 10:20:55 -0800389 /* Do not allow un-secure heap if secure is specified */
390 if (secure_allocation && (heap->type != ION_HEAP_TYPE_CP))
391 continue;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700392 buffer = ion_buffer_create(heap, dev, len, align, flags);
393 if (!IS_ERR_OR_NULL(buffer))
394 break;
Olav Haugan35e2f2f2012-01-11 17:31:47 -0800395 if (dbg_str_idx < MAX_DBG_STR_LEN) {
396 unsigned int len_left = MAX_DBG_STR_LEN-dbg_str_idx-1;
397 int ret_value = snprintf(&dbg_str[dbg_str_idx],
398 len_left, "%s ", heap->name);
399 if (ret_value >= len_left) {
400 /* overflow */
401 dbg_str[MAX_DBG_STR_LEN-1] = '\0';
402 dbg_str_idx = MAX_DBG_STR_LEN;
403 } else if (ret_value >= 0) {
404 dbg_str_idx += ret_value;
405 } else {
406 /* error */
407 dbg_str[MAX_DBG_STR_LEN-1] = '\0';
408 }
409 }
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700410 }
411 mutex_unlock(&dev->lock);
412
Olav Haugan35e2f2f2012-01-11 17:31:47 -0800413 if (IS_ERR_OR_NULL(buffer)) {
414 pr_debug("ION is unable to allocate 0x%x bytes (alignment: "
415 "0x%x) from heap(s) %sfor client %s with heap "
416 "mask 0x%x\n",
417 len, align, dbg_str, client->name, client->heap_mask);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700418 return ERR_PTR(PTR_ERR(buffer));
Olav Haugan35e2f2f2012-01-11 17:31:47 -0800419 }
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700420
421 handle = ion_handle_create(client, buffer);
422
423 if (IS_ERR_OR_NULL(handle))
424 goto end;
425
426 /*
427 * ion_buffer_create will create a buffer with a ref_cnt of 1,
428 * and ion_handle_create will take a second reference, drop one here
429 */
430 ion_buffer_put(buffer);
431
432 mutex_lock(&client->lock);
433 ion_handle_add(client, handle);
434 mutex_unlock(&client->lock);
435 return handle;
436
437end:
438 ion_buffer_put(buffer);
439 return handle;
440}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800441EXPORT_SYMBOL(ion_alloc);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700442
443void ion_free(struct ion_client *client, struct ion_handle *handle)
444{
Rebecca Schultz Zavinc72866d2011-07-07 17:07:56 -0700445 bool valid_handle;
446
447 BUG_ON(client != handle->client);
448
449 mutex_lock(&client->lock);
450 valid_handle = ion_handle_validate(client, handle);
451 mutex_unlock(&client->lock);
452
453 if (!valid_handle) {
454 WARN("%s: invalid handle passed to free.\n", __func__);
455 return;
456 }
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700457 ion_handle_put(handle);
458}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800459EXPORT_SYMBOL(ion_free);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700460
461static void ion_client_get(struct ion_client *client);
462static int ion_client_put(struct ion_client *client);
463
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700464static bool _ion_map(int *buffer_cnt, int *handle_cnt)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700465{
466 bool map;
467
468 BUG_ON(*handle_cnt != 0 && *buffer_cnt == 0);
469
470 if (*buffer_cnt)
471 map = false;
472 else
473 map = true;
474 if (*handle_cnt == 0)
475 (*buffer_cnt)++;
476 (*handle_cnt)++;
477 return map;
478}
479
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700480static bool _ion_unmap(int *buffer_cnt, int *handle_cnt)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700481{
482 BUG_ON(*handle_cnt == 0);
483 (*handle_cnt)--;
484 if (*handle_cnt != 0)
485 return false;
486 BUG_ON(*buffer_cnt == 0);
487 (*buffer_cnt)--;
488 if (*buffer_cnt == 0)
489 return true;
490 return false;
491}
492
493int ion_phys(struct ion_client *client, struct ion_handle *handle,
494 ion_phys_addr_t *addr, size_t *len)
495{
496 struct ion_buffer *buffer;
497 int ret;
498
499 mutex_lock(&client->lock);
500 if (!ion_handle_validate(client, handle)) {
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700501 mutex_unlock(&client->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700502 return -EINVAL;
503 }
504
505 buffer = handle->buffer;
506
507 if (!buffer->heap->ops->phys) {
508 pr_err("%s: ion_phys is not implemented by this heap.\n",
509 __func__);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700510 mutex_unlock(&client->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700511 return -ENODEV;
512 }
513 mutex_unlock(&client->lock);
514 ret = buffer->heap->ops->phys(buffer->heap, buffer, addr, len);
515 return ret;
516}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800517EXPORT_SYMBOL(ion_phys);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700518
Laura Abbott894fd582011-08-19 13:33:56 -0700519void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle,
520 unsigned long flags)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700521{
522 struct ion_buffer *buffer;
523 void *vaddr;
524
525 mutex_lock(&client->lock);
526 if (!ion_handle_validate(client, handle)) {
527 pr_err("%s: invalid handle passed to map_kernel.\n",
528 __func__);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700529 mutex_unlock(&client->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700530 return ERR_PTR(-EINVAL);
531 }
532
533 buffer = handle->buffer;
534 mutex_lock(&buffer->lock);
535
536 if (!handle->buffer->heap->ops->map_kernel) {
537 pr_err("%s: map_kernel is not implemented by this heap.\n",
538 __func__);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700539 mutex_unlock(&buffer->lock);
540 mutex_unlock(&client->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700541 return ERR_PTR(-ENODEV);
542 }
543
Laura Abbott8c017362011-09-22 20:59:12 -0700544 if (ion_validate_buffer_flags(buffer, flags)) {
Laura Abbott894fd582011-08-19 13:33:56 -0700545 vaddr = ERR_PTR(-EEXIST);
546 goto out;
Laura Abbott894fd582011-08-19 13:33:56 -0700547 }
548
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700549 if (_ion_map(&buffer->kmap_cnt, &handle->kmap_cnt)) {
Laura Abbott894fd582011-08-19 13:33:56 -0700550 vaddr = buffer->heap->ops->map_kernel(buffer->heap, buffer,
551 flags);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700552 if (IS_ERR_OR_NULL(vaddr))
553 _ion_unmap(&buffer->kmap_cnt, &handle->kmap_cnt);
554 buffer->vaddr = vaddr;
555 } else {
556 vaddr = buffer->vaddr;
557 }
Laura Abbott894fd582011-08-19 13:33:56 -0700558
559out:
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700560 mutex_unlock(&buffer->lock);
561 mutex_unlock(&client->lock);
562 return vaddr;
563}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800564EXPORT_SYMBOL(ion_map_kernel);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700565
Laura Abbott8c017362011-09-22 20:59:12 -0700566int __ion_iommu_map(struct ion_buffer *buffer,
567 int domain_num, int partition_num, unsigned long align,
568 unsigned long iova_length, unsigned long flags,
569 unsigned long *iova)
570{
571 struct ion_iommu_map *data;
572 int ret;
573
574 data = kmalloc(sizeof(*data), GFP_ATOMIC);
575
576 if (!data)
577 return -ENOMEM;
578
579 data->buffer = buffer;
580 iommu_map_domain(data) = domain_num;
581 iommu_map_partition(data) = partition_num;
582
583 ret = buffer->heap->ops->map_iommu(buffer, data,
584 domain_num,
585 partition_num,
586 align,
587 iova_length,
588 flags);
589
590 if (ret)
591 goto out;
592
593 kref_init(&data->ref);
594 *iova = data->iova_addr;
595
596 ion_iommu_add(buffer, data);
597
598 return 0;
599
600out:
601 msm_free_iova_address(data->iova_addr, domain_num, partition_num,
602 buffer->size);
603 kfree(data);
604 return ret;
605}
606
607int ion_map_iommu(struct ion_client *client, struct ion_handle *handle,
608 int domain_num, int partition_num, unsigned long align,
609 unsigned long iova_length, unsigned long *iova,
610 unsigned long *buffer_size,
611 unsigned long flags)
612{
613 struct ion_buffer *buffer;
614 struct ion_iommu_map *iommu_map;
615 int ret = 0;
616
617 mutex_lock(&client->lock);
618 if (!ion_handle_validate(client, handle)) {
619 pr_err("%s: invalid handle passed to map_kernel.\n",
620 __func__);
621 mutex_unlock(&client->lock);
622 return -EINVAL;
623 }
624
625 buffer = handle->buffer;
626 mutex_lock(&buffer->lock);
627
628 if (!handle->buffer->heap->ops->map_iommu) {
629 pr_err("%s: map_iommu is not implemented by this heap.\n",
630 __func__);
631 ret = -ENODEV;
632 goto out;
633 }
634
635 if (ion_validate_buffer_flags(buffer, flags)) {
636 ret = -EEXIST;
637 goto out;
638 }
639
640 /*
641 * If clients don't want a custom iova length, just use whatever
642 * the buffer size is
643 */
644 if (!iova_length)
645 iova_length = buffer->size;
646
647 if (buffer->size > iova_length) {
648 pr_debug("%s: iova length %lx is not at least buffer size"
649 " %x\n", __func__, iova_length, buffer->size);
650 ret = -EINVAL;
651 goto out;
652 }
653
654 if (buffer->size & ~PAGE_MASK) {
655 pr_debug("%s: buffer size %x is not aligned to %lx", __func__,
656 buffer->size, PAGE_SIZE);
657 ret = -EINVAL;
658 goto out;
659 }
660
661 if (iova_length & ~PAGE_MASK) {
662 pr_debug("%s: iova_length %lx is not aligned to %lx", __func__,
663 iova_length, PAGE_SIZE);
664 ret = -EINVAL;
665 goto out;
666 }
667
668 iommu_map = ion_iommu_lookup(buffer, domain_num, partition_num);
669 if (_ion_map(&buffer->iommu_map_cnt, &handle->iommu_map_cnt) ||
670 !iommu_map) {
671 ret = __ion_iommu_map(buffer, domain_num, partition_num, align,
672 iova_length, flags, iova);
673 if (ret < 0)
674 _ion_unmap(&buffer->iommu_map_cnt,
675 &handle->iommu_map_cnt);
676 } else {
677 if (iommu_map->mapped_size != iova_length) {
678 pr_err("%s: handle %p is already mapped with length"
679 " %x, trying to map with length %lx\n",
680 __func__, handle, iommu_map->mapped_size,
681 iova_length);
682 _ion_unmap(&buffer->iommu_map_cnt,
683 &handle->iommu_map_cnt);
684 ret = -EINVAL;
685 } else {
686 kref_get(&iommu_map->ref);
687 *iova = iommu_map->iova_addr;
688 }
689 }
690 *buffer_size = buffer->size;
691out:
692 mutex_unlock(&buffer->lock);
693 mutex_unlock(&client->lock);
694 return ret;
695}
696EXPORT_SYMBOL(ion_map_iommu);
697
698static void ion_iommu_release(struct kref *kref)
699{
700 struct ion_iommu_map *map = container_of(kref, struct ion_iommu_map,
701 ref);
702 struct ion_buffer *buffer = map->buffer;
703
704 rb_erase(&map->node, &buffer->iommu_maps);
705 buffer->heap->ops->unmap_iommu(map);
706 kfree(map);
707}
708
709void ion_unmap_iommu(struct ion_client *client, struct ion_handle *handle,
710 int domain_num, int partition_num)
711{
712 struct ion_iommu_map *iommu_map;
713 struct ion_buffer *buffer;
714
715 mutex_lock(&client->lock);
716 buffer = handle->buffer;
717
718 mutex_lock(&buffer->lock);
719
720 iommu_map = ion_iommu_lookup(buffer, domain_num, partition_num);
721
722 if (!iommu_map) {
723 WARN(1, "%s: (%d,%d) was never mapped for %p\n", __func__,
724 domain_num, partition_num, buffer);
725 goto out;
726 }
727
728 _ion_unmap(&buffer->iommu_map_cnt, &handle->iommu_map_cnt);
729 kref_put(&iommu_map->ref, ion_iommu_release);
730
731out:
732 mutex_unlock(&buffer->lock);
733
734 mutex_unlock(&client->lock);
735
736}
737EXPORT_SYMBOL(ion_unmap_iommu);
738
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700739struct scatterlist *ion_map_dma(struct ion_client *client,
Laura Abbott894fd582011-08-19 13:33:56 -0700740 struct ion_handle *handle,
741 unsigned long flags)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700742{
743 struct ion_buffer *buffer;
744 struct scatterlist *sglist;
745
746 mutex_lock(&client->lock);
747 if (!ion_handle_validate(client, handle)) {
748 pr_err("%s: invalid handle passed to map_dma.\n",
749 __func__);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700750 mutex_unlock(&client->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700751 return ERR_PTR(-EINVAL);
752 }
753 buffer = handle->buffer;
754 mutex_lock(&buffer->lock);
755
756 if (!handle->buffer->heap->ops->map_dma) {
757 pr_err("%s: map_kernel is not implemented by this heap.\n",
758 __func__);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -0700759 mutex_unlock(&buffer->lock);
760 mutex_unlock(&client->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700761 return ERR_PTR(-ENODEV);
762 }
Laura Abbott894fd582011-08-19 13:33:56 -0700763
Laura Abbott8c017362011-09-22 20:59:12 -0700764 if (ion_validate_buffer_flags(buffer, flags)) {
765 sglist = ERR_PTR(-EEXIST);
766 goto out;
Laura Abbott894fd582011-08-19 13:33:56 -0700767 }
768
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700769 if (_ion_map(&buffer->dmap_cnt, &handle->dmap_cnt)) {
770 sglist = buffer->heap->ops->map_dma(buffer->heap, buffer);
771 if (IS_ERR_OR_NULL(sglist))
772 _ion_unmap(&buffer->dmap_cnt, &handle->dmap_cnt);
773 buffer->sglist = sglist;
774 } else {
775 sglist = buffer->sglist;
776 }
Laura Abbott894fd582011-08-19 13:33:56 -0700777
778out:
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700779 mutex_unlock(&buffer->lock);
780 mutex_unlock(&client->lock);
781 return sglist;
782}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800783EXPORT_SYMBOL(ion_map_dma);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700784
785void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle)
786{
787 struct ion_buffer *buffer;
788
789 mutex_lock(&client->lock);
790 buffer = handle->buffer;
791 mutex_lock(&buffer->lock);
792 if (_ion_unmap(&buffer->kmap_cnt, &handle->kmap_cnt)) {
793 buffer->heap->ops->unmap_kernel(buffer->heap, buffer);
794 buffer->vaddr = NULL;
795 }
796 mutex_unlock(&buffer->lock);
797 mutex_unlock(&client->lock);
798}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800799EXPORT_SYMBOL(ion_unmap_kernel);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700800
801void ion_unmap_dma(struct ion_client *client, struct ion_handle *handle)
802{
803 struct ion_buffer *buffer;
804
805 mutex_lock(&client->lock);
806 buffer = handle->buffer;
807 mutex_lock(&buffer->lock);
808 if (_ion_unmap(&buffer->dmap_cnt, &handle->dmap_cnt)) {
809 buffer->heap->ops->unmap_dma(buffer->heap, buffer);
810 buffer->sglist = NULL;
811 }
812 mutex_unlock(&buffer->lock);
813 mutex_unlock(&client->lock);
814}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800815EXPORT_SYMBOL(ion_unmap_dma);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700816
817struct ion_buffer *ion_share(struct ion_client *client,
818 struct ion_handle *handle)
819{
Rebecca Schultz Zavinc72866d2011-07-07 17:07:56 -0700820 bool valid_handle;
821
822 mutex_lock(&client->lock);
823 valid_handle = ion_handle_validate(client, handle);
824 mutex_unlock(&client->lock);
825 if (!valid_handle) {
826 WARN("%s: invalid handle passed to share.\n", __func__);
827 return ERR_PTR(-EINVAL);
828 }
829
Iliyan Malchev3fe24362011-08-09 14:42:08 -0700830 /* do not take an extra reference here, the burden is on the caller
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700831 * to make sure the buffer doesn't go away while it's passing it
832 * to another client -- ion_free should not be called on this handle
833 * until the buffer has been imported into the other client
834 */
835 return handle->buffer;
836}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800837EXPORT_SYMBOL(ion_share);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700838
839struct ion_handle *ion_import(struct ion_client *client,
840 struct ion_buffer *buffer)
841{
842 struct ion_handle *handle = NULL;
843
844 mutex_lock(&client->lock);
845 /* if a handle exists for this buffer just take a reference to it */
846 handle = ion_handle_lookup(client, buffer);
847 if (!IS_ERR_OR_NULL(handle)) {
848 ion_handle_get(handle);
849 goto end;
850 }
851 handle = ion_handle_create(client, buffer);
852 if (IS_ERR_OR_NULL(handle))
853 goto end;
854 ion_handle_add(client, handle);
855end:
856 mutex_unlock(&client->lock);
857 return handle;
858}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800859EXPORT_SYMBOL(ion_import);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700860
Laura Abbottabcb6f72011-10-04 16:26:49 -0700861static int check_vaddr_bounds(unsigned long start, unsigned long end)
862{
863 struct mm_struct *mm = current->active_mm;
864 struct vm_area_struct *vma;
865 int ret = 1;
866
867 if (end < start)
868 goto out;
869
870 down_read(&mm->mmap_sem);
871 vma = find_vma(mm, start);
872 if (vma && vma->vm_start < end) {
873 if (start < vma->vm_start)
874 goto out_up;
875 if (end > vma->vm_end)
876 goto out_up;
877 ret = 0;
878 }
879
880out_up:
881 up_read(&mm->mmap_sem);
882out:
883 return ret;
884}
885
886int ion_do_cache_op(struct ion_client *client, struct ion_handle *handle,
887 void *uaddr, unsigned long offset, unsigned long len,
888 unsigned int cmd)
889{
890 struct ion_buffer *buffer;
Laura Abbottabcb6f72011-10-04 16:26:49 -0700891 int ret = -EINVAL;
892
893 mutex_lock(&client->lock);
894 if (!ion_handle_validate(client, handle)) {
895 pr_err("%s: invalid handle passed to do_cache_op.\n",
896 __func__);
897 mutex_unlock(&client->lock);
898 return -EINVAL;
899 }
900 buffer = handle->buffer;
901 mutex_lock(&buffer->lock);
902
Laura Abbottcbaa6682011-10-19 12:14:14 -0700903 if (!ION_IS_CACHED(buffer->flags)) {
Laura Abbottabcb6f72011-10-04 16:26:49 -0700904 ret = 0;
905 goto out;
906 }
907
908 if (!handle->buffer->heap->ops->cache_op) {
909 pr_err("%s: cache_op is not implemented by this heap.\n",
910 __func__);
911 ret = -ENODEV;
912 goto out;
913 }
914
Laura Abbottabcb6f72011-10-04 16:26:49 -0700915
916 ret = buffer->heap->ops->cache_op(buffer->heap, buffer, uaddr,
917 offset, len, cmd);
918
919out:
920 mutex_unlock(&buffer->lock);
921 mutex_unlock(&client->lock);
922 return ret;
923
924}
925
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700926static const struct file_operations ion_share_fops;
927
928struct ion_handle *ion_import_fd(struct ion_client *client, int fd)
929{
930 struct file *file = fget(fd);
931 struct ion_handle *handle;
932
933 if (!file) {
934 pr_err("%s: imported fd not found in file table.\n", __func__);
935 return ERR_PTR(-EINVAL);
936 }
937 if (file->f_op != &ion_share_fops) {
Laura Abbott084d6eb2011-10-24 19:09:50 -0700938 pr_err("%s: imported file %s is not a shared ion"
939 " file.", __func__, file->f_dentry->d_name.name);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700940 handle = ERR_PTR(-EINVAL);
941 goto end;
942 }
943 handle = ion_import(client, file->private_data);
944end:
945 fput(file);
946 return handle;
947}
Olav Hauganbd2b6922012-01-25 09:28:55 -0800948EXPORT_SYMBOL(ion_import_fd);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700949
950static int ion_debug_client_show(struct seq_file *s, void *unused)
951{
952 struct ion_client *client = s->private;
953 struct rb_node *n;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700954
Laura Abbott68c80642011-10-21 17:32:27 -0700955 seq_printf(s, "%16.16s: %16.16s : %16.16s : %16.16s\n", "heap_name",
956 "size_in_bytes", "handle refcount", "buffer");
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700957 mutex_lock(&client->lock);
958 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
959 struct ion_handle *handle = rb_entry(n, struct ion_handle,
960 node);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700961
Laura Abbott8747bbe2011-10-31 14:18:13 -0700962 seq_printf(s, "%16.16s: %16x : %16d : %16p\n",
Laura Abbott68c80642011-10-21 17:32:27 -0700963 handle->buffer->heap->name,
964 handle->buffer->size,
965 atomic_read(&handle->ref.refcount),
966 handle->buffer);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700967 }
Laura Abbott68c80642011-10-21 17:32:27 -0700968
969 seq_printf(s, "%16.16s %d\n", "client refcount:",
970 atomic_read(&client->ref.refcount));
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700971 mutex_unlock(&client->lock);
972
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -0700973 return 0;
974}
975
976static int ion_debug_client_open(struct inode *inode, struct file *file)
977{
978 return single_open(file, ion_debug_client_show, inode->i_private);
979}
980
981static const struct file_operations debug_client_fops = {
982 .open = ion_debug_client_open,
983 .read = seq_read,
984 .llseek = seq_lseek,
985 .release = single_release,
986};
987
Rebecca Schultz Zavin83e3dab2011-07-01 20:41:25 -0700988static struct ion_client *ion_client_lookup(struct ion_device *dev,
989 struct task_struct *task)
990{
991 struct rb_node *n = dev->user_clients.rb_node;
992 struct ion_client *client;
993
994 mutex_lock(&dev->lock);
995 while (n) {
996 client = rb_entry(n, struct ion_client, node);
997 if (task == client->task) {
998 ion_client_get(client);
999 mutex_unlock(&dev->lock);
1000 return client;
1001 } else if (task < client->task) {
1002 n = n->rb_left;
1003 } else if (task > client->task) {
1004 n = n->rb_right;
1005 }
1006 }
1007 mutex_unlock(&dev->lock);
1008 return NULL;
1009}
1010
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001011struct ion_client *ion_client_create(struct ion_device *dev,
1012 unsigned int heap_mask,
1013 const char *name)
1014{
1015 struct ion_client *client;
1016 struct task_struct *task;
1017 struct rb_node **p;
1018 struct rb_node *parent = NULL;
1019 struct ion_client *entry;
Rebecca Schultz Zavin83e3dab2011-07-01 20:41:25 -07001020 pid_t pid;
Olav Haugan63e5f3b2012-01-11 16:42:37 -08001021 unsigned int name_len = strnlen(name, 64);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001022
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001023 get_task_struct(current->group_leader);
1024 task_lock(current->group_leader);
Rebecca Schultz Zavin83e3dab2011-07-01 20:41:25 -07001025 pid = task_pid_nr(current->group_leader);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001026 /* don't bother to store task struct for kernel threads,
1027 they can't be killed anyway */
1028 if (current->group_leader->flags & PF_KTHREAD) {
1029 put_task_struct(current->group_leader);
1030 task = NULL;
1031 } else {
1032 task = current->group_leader;
1033 }
1034 task_unlock(current->group_leader);
Rebecca Schultz Zavin83e3dab2011-07-01 20:41:25 -07001035
1036 /* if this isn't a kernel thread, see if a client already
1037 exists */
1038 if (task) {
1039 client = ion_client_lookup(dev, task);
1040 if (!IS_ERR_OR_NULL(client)) {
1041 put_task_struct(current->group_leader);
1042 return client;
1043 }
1044 }
1045
1046 client = kzalloc(sizeof(struct ion_client), GFP_KERNEL);
1047 if (!client) {
1048 put_task_struct(current->group_leader);
1049 return ERR_PTR(-ENOMEM);
1050 }
1051
1052 client->dev = dev;
1053 client->handles = RB_ROOT;
1054 mutex_init(&client->lock);
Olav Haugan63e5f3b2012-01-11 16:42:37 -08001055
Olav Haugan6625c7d2012-01-24 13:50:43 -08001056 client->name = kzalloc(name_len+1, GFP_KERNEL);
Olav Haugan63e5f3b2012-01-11 16:42:37 -08001057 if (!client->name) {
1058 put_task_struct(current->group_leader);
1059 kfree(client);
1060 return ERR_PTR(-ENOMEM);
1061 } else {
Olav Haugan6625c7d2012-01-24 13:50:43 -08001062 strlcpy(client->name, name, name_len+1);
Olav Haugan63e5f3b2012-01-11 16:42:37 -08001063 }
1064
Rebecca Schultz Zavin83e3dab2011-07-01 20:41:25 -07001065 client->heap_mask = heap_mask;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001066 client->task = task;
Rebecca Schultz Zavin83e3dab2011-07-01 20:41:25 -07001067 client->pid = pid;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001068 kref_init(&client->ref);
1069
1070 mutex_lock(&dev->lock);
1071 if (task) {
1072 p = &dev->user_clients.rb_node;
1073 while (*p) {
1074 parent = *p;
1075 entry = rb_entry(parent, struct ion_client, node);
1076
1077 if (task < entry->task)
1078 p = &(*p)->rb_left;
1079 else if (task > entry->task)
1080 p = &(*p)->rb_right;
1081 }
1082 rb_link_node(&client->node, parent, p);
1083 rb_insert_color(&client->node, &dev->user_clients);
1084 } else {
1085 p = &dev->kernel_clients.rb_node;
1086 while (*p) {
1087 parent = *p;
1088 entry = rb_entry(parent, struct ion_client, node);
1089
1090 if (client < entry)
1091 p = &(*p)->rb_left;
1092 else if (client > entry)
1093 p = &(*p)->rb_right;
1094 }
1095 rb_link_node(&client->node, parent, p);
1096 rb_insert_color(&client->node, &dev->kernel_clients);
1097 }
1098
Laura Abbotteed86032011-12-05 15:32:36 -08001099
1100 client->debug_root = debugfs_create_file(name, 0664,
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001101 dev->debug_root, client,
1102 &debug_client_fops);
1103 mutex_unlock(&dev->lock);
1104
1105 return client;
1106}
1107
Rebecca Schultz Zavin0b7e8ae2011-07-06 18:07:01 -07001108static void _ion_client_destroy(struct kref *kref)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001109{
Rebecca Schultz Zavin0b7e8ae2011-07-06 18:07:01 -07001110 struct ion_client *client = container_of(kref, struct ion_client, ref);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001111 struct ion_device *dev = client->dev;
1112 struct rb_node *n;
1113
1114 pr_debug("%s: %d\n", __func__, __LINE__);
1115 while ((n = rb_first(&client->handles))) {
1116 struct ion_handle *handle = rb_entry(n, struct ion_handle,
1117 node);
1118 ion_handle_destroy(&handle->ref);
1119 }
1120 mutex_lock(&dev->lock);
1121 if (client->task) {
1122 rb_erase(&client->node, &dev->user_clients);
1123 put_task_struct(client->task);
1124 } else {
1125 rb_erase(&client->node, &dev->kernel_clients);
1126 }
1127 debugfs_remove_recursive(client->debug_root);
1128 mutex_unlock(&dev->lock);
1129
Olav Haugan63e5f3b2012-01-11 16:42:37 -08001130 kfree(client->name);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001131 kfree(client);
1132}
1133
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001134static void ion_client_get(struct ion_client *client)
1135{
1136 kref_get(&client->ref);
1137}
1138
1139static int ion_client_put(struct ion_client *client)
1140{
1141 return kref_put(&client->ref, _ion_client_destroy);
1142}
1143
Rebecca Schultz Zavin0b7e8ae2011-07-06 18:07:01 -07001144void ion_client_destroy(struct ion_client *client)
1145{
Jordan Crousea75022c2011-10-12 16:57:47 -06001146 if (client)
1147 ion_client_put(client);
Rebecca Schultz Zavin0b7e8ae2011-07-06 18:07:01 -07001148}
Olav Hauganbd2b6922012-01-25 09:28:55 -08001149EXPORT_SYMBOL(ion_client_destroy);
Rebecca Schultz Zavin0b7e8ae2011-07-06 18:07:01 -07001150
Laura Abbott273dd8e2011-10-12 14:26:33 -07001151int ion_handle_get_flags(struct ion_client *client, struct ion_handle *handle,
1152 unsigned long *flags)
1153{
1154 struct ion_buffer *buffer;
1155
1156 mutex_lock(&client->lock);
1157 if (!ion_handle_validate(client, handle)) {
1158 pr_err("%s: invalid handle passed to %s.\n",
1159 __func__, __func__);
1160 mutex_unlock(&client->lock);
1161 return -EINVAL;
1162 }
1163 buffer = handle->buffer;
1164 mutex_lock(&buffer->lock);
1165 *flags = buffer->flags;
1166 mutex_unlock(&buffer->lock);
1167 mutex_unlock(&client->lock);
1168
1169 return 0;
1170}
1171EXPORT_SYMBOL(ion_handle_get_flags);
1172
Laura Abbott8c017362011-09-22 20:59:12 -07001173int ion_handle_get_size(struct ion_client *client, struct ion_handle *handle,
1174 unsigned long *size)
1175{
1176 struct ion_buffer *buffer;
1177
1178 mutex_lock(&client->lock);
1179 if (!ion_handle_validate(client, handle)) {
1180 pr_err("%s: invalid handle passed to %s.\n",
1181 __func__, __func__);
1182 mutex_unlock(&client->lock);
1183 return -EINVAL;
1184 }
1185 buffer = handle->buffer;
1186 mutex_lock(&buffer->lock);
1187 *size = buffer->size;
1188 mutex_unlock(&buffer->lock);
1189 mutex_unlock(&client->lock);
1190
1191 return 0;
1192}
1193EXPORT_SYMBOL(ion_handle_get_size);
1194
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001195static int ion_share_release(struct inode *inode, struct file* file)
1196{
1197 struct ion_buffer *buffer = file->private_data;
1198
1199 pr_debug("%s: %d\n", __func__, __LINE__);
1200 /* drop the reference to the buffer -- this prevents the
1201 buffer from going away because the client holding it exited
1202 while it was being passed */
1203 ion_buffer_put(buffer);
1204 return 0;
1205}
1206
1207static void ion_vma_open(struct vm_area_struct *vma)
1208{
1209
1210 struct ion_buffer *buffer = vma->vm_file->private_data;
1211 struct ion_handle *handle = vma->vm_private_data;
1212 struct ion_client *client;
1213
1214 pr_debug("%s: %d\n", __func__, __LINE__);
1215 /* check that the client still exists and take a reference so
1216 it can't go away until this vma is closed */
1217 client = ion_client_lookup(buffer->dev, current->group_leader);
1218 if (IS_ERR_OR_NULL(client)) {
1219 vma->vm_private_data = NULL;
1220 return;
1221 }
Laura Abbott0f2175b2011-12-09 14:26:07 -08001222 ion_handle_get(handle);
Laura Abbott77168502011-12-05 11:06:24 -08001223 mutex_lock(&buffer->lock);
1224 buffer->umap_cnt++;
1225 mutex_unlock(&buffer->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001226 pr_debug("%s: %d client_cnt %d handle_cnt %d alloc_cnt %d\n",
1227 __func__, __LINE__,
1228 atomic_read(&client->ref.refcount),
1229 atomic_read(&handle->ref.refcount),
1230 atomic_read(&buffer->ref.refcount));
1231}
1232
1233static void ion_vma_close(struct vm_area_struct *vma)
1234{
1235 struct ion_handle *handle = vma->vm_private_data;
1236 struct ion_buffer *buffer = vma->vm_file->private_data;
1237 struct ion_client *client;
1238
1239 pr_debug("%s: %d\n", __func__, __LINE__);
1240 /* this indicates the client is gone, nothing to do here */
1241 if (!handle)
1242 return;
1243 client = handle->client;
Laura Abbott77168502011-12-05 11:06:24 -08001244 mutex_lock(&buffer->lock);
1245 buffer->umap_cnt--;
1246 mutex_unlock(&buffer->lock);
Laura Abbotta6835092011-11-14 15:27:02 -08001247
1248 if (buffer->heap->ops->unmap_user)
1249 buffer->heap->ops->unmap_user(buffer->heap, buffer);
1250
1251
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001252 pr_debug("%s: %d client_cnt %d handle_cnt %d alloc_cnt %d\n",
1253 __func__, __LINE__,
1254 atomic_read(&client->ref.refcount),
1255 atomic_read(&handle->ref.refcount),
1256 atomic_read(&buffer->ref.refcount));
1257 ion_handle_put(handle);
1258 ion_client_put(client);
1259 pr_debug("%s: %d client_cnt %d handle_cnt %d alloc_cnt %d\n",
1260 __func__, __LINE__,
1261 atomic_read(&client->ref.refcount),
1262 atomic_read(&handle->ref.refcount),
1263 atomic_read(&buffer->ref.refcount));
1264}
1265
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001266static struct vm_operations_struct ion_vm_ops = {
1267 .open = ion_vma_open,
1268 .close = ion_vma_close,
1269};
1270
1271static int ion_share_mmap(struct file *file, struct vm_area_struct *vma)
1272{
1273 struct ion_buffer *buffer = file->private_data;
1274 unsigned long size = vma->vm_end - vma->vm_start;
1275 struct ion_client *client;
1276 struct ion_handle *handle;
1277 int ret;
Laura Abbott894fd582011-08-19 13:33:56 -07001278 unsigned long flags = file->f_flags & O_DSYNC ?
1279 ION_SET_CACHE(UNCACHED) :
1280 ION_SET_CACHE(CACHED);
1281
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001282
1283 pr_debug("%s: %d\n", __func__, __LINE__);
1284 /* make sure the client still exists, it's possible for the client to
1285 have gone away but the map/share fd still to be around, take
1286 a reference to it so it can't go away while this mapping exists */
1287 client = ion_client_lookup(buffer->dev, current->group_leader);
1288 if (IS_ERR_OR_NULL(client)) {
1289 pr_err("%s: trying to mmap an ion handle in a process with no "
1290 "ion client\n", __func__);
1291 return -EINVAL;
1292 }
1293
1294 if ((size > buffer->size) || (size + (vma->vm_pgoff << PAGE_SHIFT) >
1295 buffer->size)) {
1296 pr_err("%s: trying to map larger area than handle has available"
1297 "\n", __func__);
1298 ret = -EINVAL;
1299 goto err;
1300 }
1301
1302 /* find the handle and take a reference to it */
1303 handle = ion_import(client, buffer);
1304 if (IS_ERR_OR_NULL(handle)) {
1305 ret = -EINVAL;
1306 goto err;
1307 }
1308
1309 if (!handle->buffer->heap->ops->map_user) {
1310 pr_err("%s: this heap does not define a method for mapping "
1311 "to userspace\n", __func__);
1312 ret = -EINVAL;
1313 goto err1;
1314 }
1315
1316 mutex_lock(&buffer->lock);
Laura Abbott894fd582011-08-19 13:33:56 -07001317
Laura Abbott8c017362011-09-22 20:59:12 -07001318 if (ion_validate_buffer_flags(buffer, flags)) {
1319 ret = -EEXIST;
1320 mutex_unlock(&buffer->lock);
1321 goto err1;
Laura Abbott894fd582011-08-19 13:33:56 -07001322 }
Laura Abbott8c017362011-09-22 20:59:12 -07001323
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001324 /* now map it to userspace */
Laura Abbott894fd582011-08-19 13:33:56 -07001325 ret = buffer->heap->ops->map_user(buffer->heap, buffer, vma,
1326 flags);
Laura Abbotte8bc7aa2011-12-09 14:49:33 -08001327
1328 buffer->umap_cnt++;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001329 if (ret) {
1330 pr_err("%s: failure mapping buffer to userspace\n",
1331 __func__);
Laura Abbott894fd582011-08-19 13:33:56 -07001332 goto err2;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001333 }
Laura Abbotte8bc7aa2011-12-09 14:49:33 -08001334 mutex_unlock(&buffer->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001335
1336 vma->vm_ops = &ion_vm_ops;
1337 /* move the handle into the vm_private_data so we can access it from
1338 vma_open/close */
1339 vma->vm_private_data = handle;
1340 pr_debug("%s: %d client_cnt %d handle_cnt %d alloc_cnt %d\n",
1341 __func__, __LINE__,
1342 atomic_read(&client->ref.refcount),
1343 atomic_read(&handle->ref.refcount),
1344 atomic_read(&buffer->ref.refcount));
1345 return 0;
1346
Laura Abbott894fd582011-08-19 13:33:56 -07001347err2:
1348 buffer->umap_cnt--;
Laura Abbotte8bc7aa2011-12-09 14:49:33 -08001349 mutex_unlock(&buffer->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001350 /* drop the reference to the handle */
Laura Abbott894fd582011-08-19 13:33:56 -07001351err1:
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001352 ion_handle_put(handle);
1353err:
Iliyan Malchev3fe24362011-08-09 14:42:08 -07001354 /* drop the reference to the client */
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001355 ion_client_put(client);
1356 return ret;
1357}
1358
1359static const struct file_operations ion_share_fops = {
1360 .owner = THIS_MODULE,
1361 .release = ion_share_release,
1362 .mmap = ion_share_mmap,
1363};
1364
1365static int ion_ioctl_share(struct file *parent, struct ion_client *client,
1366 struct ion_handle *handle)
1367{
1368 int fd = get_unused_fd();
1369 struct file *file;
1370
1371 if (fd < 0)
1372 return -ENFILE;
1373
1374 file = anon_inode_getfile("ion_share_fd", &ion_share_fops,
1375 handle->buffer, O_RDWR);
1376 if (IS_ERR_OR_NULL(file))
1377 goto err;
Laura Abbott4b5d0482011-09-27 18:35:14 -07001378
1379 if (parent->f_flags & O_DSYNC)
1380 file->f_flags |= O_DSYNC;
1381
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001382 ion_buffer_get(handle->buffer);
1383 fd_install(fd, file);
1384
1385 return fd;
1386
1387err:
1388 put_unused_fd(fd);
1389 return -ENFILE;
1390}
1391
1392static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1393{
1394 struct ion_client *client = filp->private_data;
1395
1396 switch (cmd) {
1397 case ION_IOC_ALLOC:
1398 {
1399 struct ion_allocation_data data;
1400
1401 if (copy_from_user(&data, (void __user *)arg, sizeof(data)))
1402 return -EFAULT;
1403 data.handle = ion_alloc(client, data.len, data.align,
1404 data.flags);
Laura Abbotte1b9ce52011-11-11 18:31:39 -08001405
1406 if (IS_ERR_OR_NULL(data.handle))
Olav Hauganb06ee072011-12-13 15:31:41 -08001407 return -ENOMEM;
Laura Abbotte1b9ce52011-11-11 18:31:39 -08001408
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001409 if (copy_to_user((void __user *)arg, &data, sizeof(data)))
1410 return -EFAULT;
1411 break;
1412 }
1413 case ION_IOC_FREE:
1414 {
1415 struct ion_handle_data data;
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -07001416 bool valid;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001417
1418 if (copy_from_user(&data, (void __user *)arg,
1419 sizeof(struct ion_handle_data)))
1420 return -EFAULT;
1421 mutex_lock(&client->lock);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -07001422 valid = ion_handle_validate(client, data.handle);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001423 mutex_unlock(&client->lock);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -07001424 if (!valid)
1425 return -EINVAL;
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001426 ion_free(client, data.handle);
1427 break;
1428 }
1429 case ION_IOC_MAP:
1430 case ION_IOC_SHARE:
1431 {
1432 struct ion_fd_data data;
1433
1434 if (copy_from_user(&data, (void __user *)arg, sizeof(data)))
1435 return -EFAULT;
1436 mutex_lock(&client->lock);
1437 if (!ion_handle_validate(client, data.handle)) {
1438 pr_err("%s: invalid handle passed to share ioctl.\n",
1439 __func__);
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -07001440 mutex_unlock(&client->lock);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001441 return -EINVAL;
1442 }
1443 data.fd = ion_ioctl_share(filp, client, data.handle);
1444 mutex_unlock(&client->lock);
1445 if (copy_to_user((void __user *)arg, &data, sizeof(data)))
1446 return -EFAULT;
1447 break;
1448 }
1449 case ION_IOC_IMPORT:
1450 {
1451 struct ion_fd_data data;
1452 if (copy_from_user(&data, (void __user *)arg,
1453 sizeof(struct ion_fd_data)))
1454 return -EFAULT;
1455
1456 data.handle = ion_import_fd(client, data.fd);
1457 if (IS_ERR(data.handle))
1458 data.handle = NULL;
1459 if (copy_to_user((void __user *)arg, &data,
1460 sizeof(struct ion_fd_data)))
1461 return -EFAULT;
1462 break;
1463 }
1464 case ION_IOC_CUSTOM:
1465 {
1466 struct ion_device *dev = client->dev;
1467 struct ion_custom_data data;
1468
1469 if (!dev->custom_ioctl)
1470 return -ENOTTY;
1471 if (copy_from_user(&data, (void __user *)arg,
1472 sizeof(struct ion_custom_data)))
1473 return -EFAULT;
1474 return dev->custom_ioctl(client, data.cmd, data.arg);
1475 }
Laura Abbottabcb6f72011-10-04 16:26:49 -07001476 case ION_IOC_CLEAN_CACHES:
1477 case ION_IOC_INV_CACHES:
1478 case ION_IOC_CLEAN_INV_CACHES:
1479 {
1480 struct ion_flush_data data;
Laura Abbott9fa29e82011-11-14 09:42:53 -08001481 unsigned long start, end;
Laura Abbotte80ea012011-11-18 18:36:47 -08001482 struct ion_handle *handle = NULL;
1483 int ret;
Laura Abbottabcb6f72011-10-04 16:26:49 -07001484
1485 if (copy_from_user(&data, (void __user *)arg,
1486 sizeof(struct ion_flush_data)))
1487 return -EFAULT;
1488
Laura Abbott9fa29e82011-11-14 09:42:53 -08001489 start = (unsigned long) data.vaddr;
1490 end = (unsigned long) data.vaddr + data.length;
1491
1492 if (check_vaddr_bounds(start, end)) {
1493 pr_err("%s: virtual address %p is out of bounds\n",
1494 __func__, data.vaddr);
1495 return -EINVAL;
1496 }
1497
Laura Abbotte80ea012011-11-18 18:36:47 -08001498 if (!data.handle) {
1499 handle = ion_import_fd(client, data.fd);
1500 if (IS_ERR_OR_NULL(handle)) {
1501 pr_info("%s: Could not import handle: %d\n",
1502 __func__, (int)handle);
1503 return -EINVAL;
1504 }
1505 }
1506
1507 ret = ion_do_cache_op(client,
1508 data.handle ? data.handle : handle,
1509 data.vaddr, data.offset, data.length,
1510 cmd);
1511
1512 if (!data.handle)
1513 ion_free(client, handle);
1514
1515 break;
Laura Abbottabcb6f72011-10-04 16:26:49 -07001516
1517 }
Laura Abbott273dd8e2011-10-12 14:26:33 -07001518 case ION_IOC_GET_FLAGS:
1519 {
1520 struct ion_flag_data data;
1521 int ret;
1522 if (copy_from_user(&data, (void __user *)arg,
1523 sizeof(struct ion_flag_data)))
1524 return -EFAULT;
1525
1526 ret = ion_handle_get_flags(client, data.handle, &data.flags);
1527 if (ret < 0)
1528 return ret;
1529 if (copy_to_user((void __user *)arg, &data,
1530 sizeof(struct ion_flag_data)))
1531 return -EFAULT;
1532 break;
1533 }
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001534 default:
1535 return -ENOTTY;
1536 }
1537 return 0;
1538}
1539
1540static int ion_release(struct inode *inode, struct file *file)
1541{
1542 struct ion_client *client = file->private_data;
1543
1544 pr_debug("%s: %d\n", __func__, __LINE__);
1545 ion_client_put(client);
1546 return 0;
1547}
1548
1549static int ion_open(struct inode *inode, struct file *file)
1550{
1551 struct miscdevice *miscdev = file->private_data;
1552 struct ion_device *dev = container_of(miscdev, struct ion_device, dev);
1553 struct ion_client *client;
Laura Abbotteed86032011-12-05 15:32:36 -08001554 char debug_name[64];
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001555
1556 pr_debug("%s: %d\n", __func__, __LINE__);
Laura Abbotteed86032011-12-05 15:32:36 -08001557 snprintf(debug_name, 64, "%u", task_pid_nr(current->group_leader));
1558 client = ion_client_create(dev, -1, debug_name);
Rebecca Schultz Zavin6d3b9582011-07-06 18:07:24 -07001559 if (IS_ERR_OR_NULL(client))
1560 return PTR_ERR(client);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001561 file->private_data = client;
1562
1563 return 0;
1564}
1565
1566static const struct file_operations ion_fops = {
1567 .owner = THIS_MODULE,
1568 .open = ion_open,
1569 .release = ion_release,
1570 .unlocked_ioctl = ion_ioctl,
1571};
1572
1573static size_t ion_debug_heap_total(struct ion_client *client,
Laura Abbott3647ac32011-10-31 14:09:53 -07001574 enum ion_heap_ids id)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001575{
1576 size_t size = 0;
1577 struct rb_node *n;
1578
1579 mutex_lock(&client->lock);
1580 for (n = rb_first(&client->handles); n; n = rb_next(n)) {
1581 struct ion_handle *handle = rb_entry(n,
1582 struct ion_handle,
1583 node);
Laura Abbott3647ac32011-10-31 14:09:53 -07001584 if (handle->buffer->heap->id == id)
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001585 size += handle->buffer->size;
1586 }
1587 mutex_unlock(&client->lock);
1588 return size;
1589}
1590
1591static int ion_debug_heap_show(struct seq_file *s, void *unused)
1592{
1593 struct ion_heap *heap = s->private;
1594 struct ion_device *dev = heap->dev;
1595 struct rb_node *n;
1596
1597 seq_printf(s, "%16.s %16.s %16.s\n", "client", "pid", "size");
1598 for (n = rb_first(&dev->user_clients); n; n = rb_next(n)) {
1599 struct ion_client *client = rb_entry(n, struct ion_client,
1600 node);
1601 char task_comm[TASK_COMM_LEN];
Laura Abbott3647ac32011-10-31 14:09:53 -07001602 size_t size = ion_debug_heap_total(client, heap->id);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001603 if (!size)
1604 continue;
1605
1606 get_task_comm(task_comm, client->task);
Laura Abbott8747bbe2011-10-31 14:18:13 -07001607 seq_printf(s, "%16.s %16u %16x\n", task_comm, client->pid,
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001608 size);
1609 }
1610
1611 for (n = rb_first(&dev->kernel_clients); n; n = rb_next(n)) {
1612 struct ion_client *client = rb_entry(n, struct ion_client,
1613 node);
Laura Abbott3647ac32011-10-31 14:09:53 -07001614 size_t size = ion_debug_heap_total(client, heap->id);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001615 if (!size)
1616 continue;
Laura Abbott8747bbe2011-10-31 14:18:13 -07001617 seq_printf(s, "%16.s %16u %16x\n", client->name, client->pid,
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001618 size);
1619 }
Olav Haugan3d4fe1a2012-01-13 11:42:15 -08001620 if (heap->ops->print_debug)
1621 heap->ops->print_debug(heap, s);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001622 return 0;
1623}
1624
1625static int ion_debug_heap_open(struct inode *inode, struct file *file)
1626{
1627 return single_open(file, ion_debug_heap_show, inode->i_private);
1628}
1629
1630static const struct file_operations debug_heap_fops = {
1631 .open = ion_debug_heap_open,
1632 .read = seq_read,
1633 .llseek = seq_lseek,
1634 .release = single_release,
1635};
1636
1637void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap)
1638{
1639 struct rb_node **p = &dev->heaps.rb_node;
1640 struct rb_node *parent = NULL;
1641 struct ion_heap *entry;
1642
1643 heap->dev = dev;
1644 mutex_lock(&dev->lock);
1645 while (*p) {
1646 parent = *p;
1647 entry = rb_entry(parent, struct ion_heap, node);
1648
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -07001649 if (heap->id < entry->id) {
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001650 p = &(*p)->rb_left;
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -07001651 } else if (heap->id > entry->id ) {
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001652 p = &(*p)->rb_right;
1653 } else {
1654 pr_err("%s: can not insert multiple heaps with "
Rebecca Schultz Zavine6ee1242011-06-30 12:19:55 -07001655 "id %d\n", __func__, heap->id);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001656 goto end;
1657 }
1658 }
1659
1660 rb_link_node(&heap->node, parent, p);
1661 rb_insert_color(&heap->node, &dev->heaps);
1662 debugfs_create_file(heap->name, 0664, dev->debug_root, heap,
1663 &debug_heap_fops);
1664end:
1665 mutex_unlock(&dev->lock);
1666}
1667
Olav Haugan0a852512012-01-09 10:20:55 -08001668int ion_secure_heap(struct ion_device *dev, int heap_id)
1669{
1670 struct rb_node *n;
1671 int ret_val = 0;
1672
1673 /*
1674 * traverse the list of heaps available in this system
1675 * and find the heap that is specified.
1676 */
1677 mutex_lock(&dev->lock);
1678 for (n = rb_first(&dev->heaps); n != NULL; n = rb_next(n)) {
1679 struct ion_heap *heap = rb_entry(n, struct ion_heap, node);
1680 if (heap->type != ION_HEAP_TYPE_CP)
1681 continue;
1682 if (ION_HEAP(heap->id) != heap_id)
1683 continue;
1684 if (heap->ops->secure_heap)
1685 ret_val = heap->ops->secure_heap(heap);
1686 else
1687 ret_val = -EINVAL;
1688 break;
1689 }
1690 mutex_unlock(&dev->lock);
1691 return ret_val;
1692}
1693EXPORT_SYMBOL(ion_secure_heap);
1694
1695int ion_unsecure_heap(struct ion_device *dev, int heap_id)
1696{
1697 struct rb_node *n;
1698 int ret_val = 0;
1699
1700 /*
1701 * traverse the list of heaps available in this system
1702 * and find the heap that is specified.
1703 */
1704 mutex_lock(&dev->lock);
1705 for (n = rb_first(&dev->heaps); n != NULL; n = rb_next(n)) {
1706 struct ion_heap *heap = rb_entry(n, struct ion_heap, node);
1707 if (heap->type != ION_HEAP_TYPE_CP)
1708 continue;
1709 if (ION_HEAP(heap->id) != heap_id)
1710 continue;
1711 if (heap->ops->secure_heap)
1712 ret_val = heap->ops->unsecure_heap(heap);
1713 else
1714 ret_val = -EINVAL;
1715 break;
1716 }
1717 mutex_unlock(&dev->lock);
1718 return ret_val;
1719}
1720EXPORT_SYMBOL(ion_unsecure_heap);
1721
Laura Abbott404f8242011-10-31 14:22:53 -07001722static int ion_debug_leak_show(struct seq_file *s, void *unused)
1723{
1724 struct ion_device *dev = s->private;
1725 struct rb_node *n;
1726 struct rb_node *n2;
1727
1728 /* mark all buffers as 1 */
1729 seq_printf(s, "%16.s %16.s %16.s %16.s\n", "buffer", "heap", "size",
1730 "ref cnt");
1731 mutex_lock(&dev->lock);
1732 for (n = rb_first(&dev->buffers); n; n = rb_next(n)) {
1733 struct ion_buffer *buf = rb_entry(n, struct ion_buffer,
1734 node);
1735
1736 buf->marked = 1;
1737 }
1738
1739 /* now see which buffers we can access */
1740 for (n = rb_first(&dev->kernel_clients); n; n = rb_next(n)) {
1741 struct ion_client *client = rb_entry(n, struct ion_client,
1742 node);
1743
1744 mutex_lock(&client->lock);
1745 for (n2 = rb_first(&client->handles); n2; n2 = rb_next(n2)) {
1746 struct ion_handle *handle = rb_entry(n2,
1747 struct ion_handle, node);
1748
1749 handle->buffer->marked = 0;
1750
1751 }
1752 mutex_unlock(&client->lock);
1753
1754 }
1755
1756 for (n = rb_first(&dev->user_clients); n; n = rb_next(n)) {
1757 struct ion_client *client = rb_entry(n, struct ion_client,
1758 node);
1759
1760 mutex_lock(&client->lock);
1761 for (n2 = rb_first(&client->handles); n2; n2 = rb_next(n2)) {
1762 struct ion_handle *handle = rb_entry(n2,
1763 struct ion_handle, node);
1764
1765 handle->buffer->marked = 0;
1766
1767 }
1768 mutex_unlock(&client->lock);
1769
1770 }
1771 /* And anyone still marked as a 1 means a leaked handle somewhere */
1772 for (n = rb_first(&dev->buffers); n; n = rb_next(n)) {
1773 struct ion_buffer *buf = rb_entry(n, struct ion_buffer,
1774 node);
1775
1776 if (buf->marked == 1)
1777 seq_printf(s, "%16.x %16.s %16.x %16.d\n",
1778 (int)buf, buf->heap->name, buf->size,
1779 atomic_read(&buf->ref.refcount));
1780 }
1781 mutex_unlock(&dev->lock);
1782 return 0;
1783}
1784
1785static int ion_debug_leak_open(struct inode *inode, struct file *file)
1786{
1787 return single_open(file, ion_debug_leak_show, inode->i_private);
1788}
1789
1790static const struct file_operations debug_leak_fops = {
1791 .open = ion_debug_leak_open,
1792 .read = seq_read,
1793 .llseek = seq_lseek,
1794 .release = single_release,
1795};
1796
1797
1798
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001799struct ion_device *ion_device_create(long (*custom_ioctl)
1800 (struct ion_client *client,
1801 unsigned int cmd,
1802 unsigned long arg))
1803{
1804 struct ion_device *idev;
1805 int ret;
1806
1807 idev = kzalloc(sizeof(struct ion_device), GFP_KERNEL);
1808 if (!idev)
1809 return ERR_PTR(-ENOMEM);
1810
1811 idev->dev.minor = MISC_DYNAMIC_MINOR;
1812 idev->dev.name = "ion";
1813 idev->dev.fops = &ion_fops;
1814 idev->dev.parent = NULL;
1815 ret = misc_register(&idev->dev);
1816 if (ret) {
1817 pr_err("ion: failed to register misc device.\n");
1818 return ERR_PTR(ret);
1819 }
1820
1821 idev->debug_root = debugfs_create_dir("ion", NULL);
1822 if (IS_ERR_OR_NULL(idev->debug_root))
1823 pr_err("ion: failed to create debug files.\n");
1824
1825 idev->custom_ioctl = custom_ioctl;
1826 idev->buffers = RB_ROOT;
1827 mutex_init(&idev->lock);
1828 idev->heaps = RB_ROOT;
1829 idev->user_clients = RB_ROOT;
1830 idev->kernel_clients = RB_ROOT;
Laura Abbott404f8242011-10-31 14:22:53 -07001831 debugfs_create_file("check_leaked_fds", 0664, idev->debug_root, idev,
1832 &debug_leak_fops);
Rebecca Schultz Zavinc80005a2011-06-29 19:44:29 -07001833 return idev;
1834}
1835
1836void ion_device_destroy(struct ion_device *dev)
1837{
1838 misc_deregister(&dev->dev);
1839 /* XXX need to free the heaps and clients ? */
1840 kfree(dev);
1841}