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 list_for_each_prev(head, &snd_alloc_kmalloc_list) {
75 t = list_entry(head, struct snd_alloc_track, list);
76 if (t->magic != KMALLOC_MAGIC) {
77 snd_printk(KERN_ERR "Corrupted kmalloc\n");
80 snd_printk(KERN_ERR "kmalloc(%ld) from %p not freed\n", (long) t->size, t->caller);
82 list_for_each_prev(head, &snd_alloc_vmalloc_list) {
83 t = list_entry(head, struct snd_alloc_track, list);
84 if (t->magic != VMALLOC_MAGIC) {
85 snd_printk(KERN_ERR "Corrupted vmalloc\n");
88 snd_printk(KERN_ERR "vmalloc(%ld) from %p not freed\n", (long) t->size, t->caller);
92 void *__snd_kmalloc(size_t size, int flags, void *caller)
94 unsigned long cpu_flags;
95 struct snd_alloc_track *t;
98 ptr = snd_wrapper_kmalloc(size + sizeof(struct snd_alloc_track), flags);
100 t = (struct snd_alloc_track *)ptr;
101 t->magic = KMALLOC_MAGIC;
103 spin_lock_irqsave(&snd_alloc_kmalloc_lock, cpu_flags);
104 list_add_tail(&t->list, &snd_alloc_kmalloc_list);
105 spin_unlock_irqrestore(&snd_alloc_kmalloc_lock, cpu_flags);
107 snd_alloc_kmalloc += size;
113 #define _snd_kmalloc(size, flags) __snd_kmalloc((size), (flags), __builtin_return_address(0));
114 void *snd_hidden_kmalloc(size_t size, int flags)
116 return _snd_kmalloc(size, flags);
119 void *snd_hidden_kcalloc(size_t n, size_t size, int flags)
122 if (n != 0 && size > INT_MAX / n)
124 ret = _snd_kmalloc(n * size, flags);
126 memset(ret, 0, n * size);
130 void snd_hidden_kfree(const void *obj)
133 struct snd_alloc_track *t;
135 snd_printk(KERN_WARNING "null kfree (called from %p)\n", __builtin_return_address(0));
138 t = snd_alloc_track_entry(obj);
139 if (t->magic != KMALLOC_MAGIC) {
140 snd_printk(KERN_WARNING "bad kfree (called from %p)\n", __builtin_return_address(0));
143 spin_lock_irqsave(&snd_alloc_kmalloc_lock, flags);
145 spin_unlock_irqrestore(&snd_alloc_kmalloc_lock, flags);
147 snd_alloc_kmalloc -= t->size;
149 snd_wrapper_kfree(obj);
152 void *snd_hidden_vmalloc(unsigned long size)
155 ptr = snd_wrapper_vmalloc(size + sizeof(struct snd_alloc_track));
157 struct snd_alloc_track *t = (struct snd_alloc_track *)ptr;
158 t->magic = VMALLOC_MAGIC;
159 t->caller = __builtin_return_address(0);
160 spin_lock(&snd_alloc_vmalloc_lock);
161 list_add_tail(&t->list, &snd_alloc_vmalloc_list);
162 spin_unlock(&snd_alloc_vmalloc_lock);
164 snd_alloc_vmalloc += size;
170 void snd_hidden_vfree(void *obj)
172 struct snd_alloc_track *t;
174 snd_printk(KERN_WARNING "null vfree (called from %p)\n", __builtin_return_address(0));
177 t = snd_alloc_track_entry(obj);
178 if (t->magic != VMALLOC_MAGIC) {
179 snd_printk(KERN_ERR "bad vfree (called from %p)\n", __builtin_return_address(0));
182 spin_lock(&snd_alloc_vmalloc_lock);
184 spin_unlock(&snd_alloc_vmalloc_lock);
186 snd_alloc_vmalloc -= t->size;
188 snd_wrapper_vfree(obj);
191 static void snd_memory_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
193 snd_iprintf(buffer, "kmalloc: %li bytes\n", snd_alloc_kmalloc);
194 snd_iprintf(buffer, "vmalloc: %li bytes\n", snd_alloc_vmalloc);
197 int __init snd_memory_info_init(void)
199 snd_info_entry_t *entry;
201 entry = snd_info_create_module_entry(THIS_MODULE, "meminfo", NULL);
203 entry->c.text.read_size = 256;
204 entry->c.text.read = snd_memory_info_read;
205 if (snd_info_register(entry) < 0) {
206 snd_info_free_entry(entry);
210 snd_memory_info_entry = entry;
214 int __exit snd_memory_info_done(void)
216 if (snd_memory_info_entry)
217 snd_info_unregister(snd_memory_info_entry);
223 #define _snd_kmalloc kmalloc
225 #endif /* CONFIG_SND_DEBUG_MEMORY */
228 * snd_kmalloc_strdup - copy the string
229 * @string: the original string
230 * @flags: allocation conditions, GFP_XXX
232 * Allocates a memory chunk via kmalloc() and copies the string to it.
234 * Returns the pointer, or NULL if no enoguh memory.
236 char *snd_kmalloc_strdup(const char *string, int flags)
243 len = strlen(string) + 1;
244 ptr = _snd_kmalloc(len, flags);
246 memcpy(ptr, string, len);
251 * copy_to_user_fromio - copy data from mmio-space to user-space
252 * @dst: the destination pointer on user-space
253 * @src: the source pointer on mmio
254 * @count: the data size to copy in bytes
256 * Copies the data from mmio-space to user-space.
258 * Returns zero if successful, or non-zero on failure.
260 int copy_to_user_fromio(void __user *dst, unsigned long src, size_t count)
262 #if defined(__i386__) || defined(CONFIG_SPARC32)
263 return copy_to_user(dst, (const void*)src, count) ? -EFAULT : 0;
270 memcpy_fromio(buf, (void*)src, c);
271 if (copy_to_user(dst, buf, c))
282 * copy_from_user_toio - copy data from user-space to mmio-space
283 * @dst: the destination pointer on mmio-space
284 * @src: the source pointer on user-space
285 * @count: the data size to copy in bytes
287 * Copies the data from user-space to mmio-space.
289 * Returns zero if successful, or non-zero on failure.
291 int copy_from_user_toio(unsigned long dst, const void __user *src, size_t count)
293 #if defined(__i386__) || defined(CONFIG_SPARC32)
294 return copy_from_user((void*)dst, src, count) ? -EFAULT : 0;
301 if (copy_from_user(buf, src, c))
303 memcpy_toio((void*)dst, buf, c);