2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 * Memory allocation helpers.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <sound/driver.h>
25 #include <asm/uaccess.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/time.h>
29 #include <linux/pci.h>
30 #include <sound/core.h>
31 #include <sound/info.h>
34 * memory allocation helpers and debug routines
37 #ifdef CONFIG_SND_DEBUG_MEMORY
39 struct snd_alloc_track {
43 struct list_head list;
47 #define snd_alloc_track_entry(obj) (struct snd_alloc_track *)((char*)obj - (unsigned long)((struct snd_alloc_track *)0)->data)
49 static long snd_alloc_kmalloc;
50 static long snd_alloc_vmalloc;
51 static LIST_HEAD(snd_alloc_kmalloc_list);
52 static LIST_HEAD(snd_alloc_vmalloc_list);
53 static spinlock_t snd_alloc_kmalloc_lock = SPIN_LOCK_UNLOCKED;
54 static spinlock_t snd_alloc_vmalloc_lock = SPIN_LOCK_UNLOCKED;
55 #define KMALLOC_MAGIC 0x87654321
56 #define VMALLOC_MAGIC 0x87654320
57 static snd_info_entry_t *snd_memory_info_entry;
59 void snd_memory_init(void)
61 snd_alloc_kmalloc = 0;
62 snd_alloc_vmalloc = 0;
65 void snd_memory_done(void)
67 struct list_head *head;
68 struct snd_alloc_track *t;
70 if (snd_alloc_kmalloc > 0)
71 snd_printk(KERN_ERR "Not freed snd_alloc_kmalloc = %li\n", snd_alloc_kmalloc);
72 if (snd_alloc_vmalloc > 0)
73 snd_printk(KERN_ERR "Not freed snd_alloc_vmalloc = %li\n", snd_alloc_vmalloc);
74 for (head = snd_alloc_kmalloc_list.prev;
75 head != &snd_alloc_kmalloc_list; head = head->prev) {
76 t = list_entry(head, struct snd_alloc_track, list);
77 if (t->magic != KMALLOC_MAGIC) {
78 snd_printk(KERN_ERR "Corrupted kmalloc\n");
81 snd_printk(KERN_ERR "kmalloc(%ld) from %p not freed\n", (long) t->size, t->caller);
83 for (head = snd_alloc_vmalloc_list.prev;
84 head != &snd_alloc_vmalloc_list; head = head->prev) {
85 t = list_entry(head, struct snd_alloc_track, list);
86 if (t->magic != VMALLOC_MAGIC) {
87 snd_printk(KERN_ERR "Corrupted vmalloc\n");
90 snd_printk(KERN_ERR "vmalloc(%ld) from %p not freed\n", (long) t->size, t->caller);
94 void *__snd_kmalloc(size_t size, int flags, void *caller)
96 unsigned long cpu_flags;
97 struct snd_alloc_track *t;
100 ptr = snd_wrapper_kmalloc(size + sizeof(struct snd_alloc_track), flags);
102 t = (struct snd_alloc_track *)ptr;
103 t->magic = KMALLOC_MAGIC;
105 spin_lock_irqsave(&snd_alloc_kmalloc_lock, cpu_flags);
106 list_add_tail(&t->list, &snd_alloc_kmalloc_list);
107 spin_unlock_irqrestore(&snd_alloc_kmalloc_lock, cpu_flags);
109 snd_alloc_kmalloc += size;
115 #define _snd_kmalloc(size, flags) __snd_kmalloc((size), (flags), __builtin_return_address(0));
116 void *snd_hidden_kmalloc(size_t size, int flags)
118 return _snd_kmalloc(size, flags);
121 void snd_hidden_kfree(const void *obj)
124 struct snd_alloc_track *t;
126 snd_printk(KERN_WARNING "null kfree (called from %p)\n", __builtin_return_address(0));
129 t = snd_alloc_track_entry(obj);
130 if (t->magic != KMALLOC_MAGIC) {
131 snd_printk(KERN_WARNING "bad kfree (called from %p)\n", __builtin_return_address(0));
134 spin_lock_irqsave(&snd_alloc_kmalloc_lock, flags);
136 spin_unlock_irqrestore(&snd_alloc_kmalloc_lock, flags);
138 snd_alloc_kmalloc -= t->size;
140 snd_wrapper_kfree(obj);
143 void *_snd_magic_kcalloc(unsigned long magic, size_t size, int flags)
146 ptr = _snd_kmalloc(size + sizeof(unsigned long), flags);
149 memset(ptr, 0, size);
154 void *_snd_magic_kmalloc(unsigned long magic, size_t size, int flags)
157 ptr = _snd_kmalloc(size + sizeof(unsigned long), flags);
163 void snd_magic_kfree(void *_ptr)
165 unsigned long *ptr = _ptr;
167 snd_printk(KERN_WARNING "null snd_magic_kfree (called from %p)\n", __builtin_return_address(0));
172 struct snd_alloc_track *t;
173 t = snd_alloc_track_entry(ptr);
174 if (t->magic != KMALLOC_MAGIC) {
175 snd_printk(KERN_ERR "bad snd_magic_kfree (called from %p)\n", __builtin_return_address(0));
179 snd_hidden_kfree(ptr);
183 void *snd_hidden_vmalloc(unsigned long size)
186 ptr = snd_wrapper_vmalloc(size + sizeof(struct snd_alloc_track));
188 struct snd_alloc_track *t = (struct snd_alloc_track *)ptr;
189 t->magic = VMALLOC_MAGIC;
190 t->caller = __builtin_return_address(0);
191 spin_lock(&snd_alloc_vmalloc_lock);
192 list_add_tail(&t->list, &snd_alloc_vmalloc_list);
193 spin_unlock(&snd_alloc_vmalloc_lock);
195 snd_alloc_vmalloc += size;
201 void snd_hidden_vfree(void *obj)
203 struct snd_alloc_track *t;
205 snd_printk(KERN_WARNING "null vfree (called from %p)\n", __builtin_return_address(0));
208 t = snd_alloc_track_entry(obj);
209 if (t->magic != VMALLOC_MAGIC) {
210 snd_printk(KERN_ERR "bad vfree (called from %p)\n", __builtin_return_address(0));
213 spin_lock(&snd_alloc_vmalloc_lock);
215 spin_unlock(&snd_alloc_vmalloc_lock);
217 snd_alloc_vmalloc -= t->size;
219 snd_wrapper_vfree(obj);
222 static void snd_memory_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
224 snd_iprintf(buffer, "kmalloc: %li bytes\n", snd_alloc_kmalloc);
225 snd_iprintf(buffer, "vmalloc: %li bytes\n", snd_alloc_vmalloc);
228 int __init snd_memory_info_init(void)
230 snd_info_entry_t *entry;
232 entry = snd_info_create_module_entry(THIS_MODULE, "meminfo", NULL);
234 entry->c.text.read_size = 256;
235 entry->c.text.read = snd_memory_info_read;
236 if (snd_info_register(entry) < 0) {
237 snd_info_free_entry(entry);
241 snd_memory_info_entry = entry;
245 int __exit snd_memory_info_done(void)
247 if (snd_memory_info_entry)
248 snd_info_unregister(snd_memory_info_entry);
254 #define _snd_kmalloc kmalloc
256 #endif /* CONFIG_SND_DEBUG_MEMORY */
259 * snd_kcalloc - memory allocation and zero-clear
260 * @size: the size to allocate in bytes
261 * @flags: allocation conditions, GFP_XXX
263 * Allocates a memory chunk via kmalloc() and initializes it to zero.
265 * Returns the pointer, or NULL if no enoguh memory.
267 void *snd_kcalloc(size_t size, int flags)
271 ptr = _snd_kmalloc(size, flags);
273 memset(ptr, 0, size);
278 * snd_kmalloc_strdup - copy the string
279 * @string: the original string
280 * @flags: allocation conditions, GFP_XXX
282 * Allocates a memory chunk via kmalloc() and copies the string to it.
284 * Returns the pointer, or NULL if no enoguh memory.
286 char *snd_kmalloc_strdup(const char *string, int flags)
293 len = strlen(string) + 1;
294 ptr = _snd_kmalloc(len, flags);
296 memcpy(ptr, string, len);
301 * copy_to_user_fromio - copy data from mmio-space to user-space
302 * @dst: the destination pointer on user-space
303 * @src: the source pointer on mmio
304 * @count: the data size to copy in bytes
306 * Copies the data from mmio-space to user-space.
308 * Returns zero if successful, or non-zero on failure.
310 int copy_to_user_fromio(void *dst, unsigned long src, size_t count)
312 #if defined(__i386__) || defined(CONFIG_SPARC32)
313 return copy_to_user(dst, (const void*)src, count) ? -EFAULT : 0;
320 memcpy_fromio(buf, (void*)src, c);
321 if (copy_to_user(dst, buf, c))
332 * copy_from_user_toio - copy data from user-space to mmio-space
333 * @dst: the destination pointer on mmio-space
334 * @src: the source pointer on user-space
335 * @count: the data size to copy in bytes
337 * Copies the data from user-space to mmio-space.
339 * Returns zero if successful, or non-zero on failure.
341 int copy_from_user_toio(unsigned long dst, const void *src, size_t count)
343 #if defined(__i386__) || defined(CONFIG_SPARC32)
344 return copy_from_user((void*)dst, src, count) ? -EFAULT : 0;
351 if (copy_from_user(buf, src, c))
353 memcpy_toio((void*)dst, buf, c);