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 DEFINE_SPINLOCK(snd_alloc_kmalloc_lock);
54 static DEFINE_SPINLOCK(snd_alloc_vmalloc_lock);
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 static 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;
136 t = snd_alloc_track_entry(obj);
137 if (t->magic != KMALLOC_MAGIC) {
138 snd_printk(KERN_WARNING "bad kfree (called from %p)\n", __builtin_return_address(0));
141 spin_lock_irqsave(&snd_alloc_kmalloc_lock, flags);
143 spin_unlock_irqrestore(&snd_alloc_kmalloc_lock, flags);
145 snd_alloc_kmalloc -= t->size;
147 snd_wrapper_kfree(obj);
150 void *snd_hidden_vmalloc(unsigned long size)
153 ptr = snd_wrapper_vmalloc(size + sizeof(struct snd_alloc_track));
155 struct snd_alloc_track *t = (struct snd_alloc_track *)ptr;
156 t->magic = VMALLOC_MAGIC;
157 t->caller = __builtin_return_address(0);
158 spin_lock(&snd_alloc_vmalloc_lock);
159 list_add_tail(&t->list, &snd_alloc_vmalloc_list);
160 spin_unlock(&snd_alloc_vmalloc_lock);
162 snd_alloc_vmalloc += size;
168 void snd_hidden_vfree(void *obj)
170 struct snd_alloc_track *t;
173 t = snd_alloc_track_entry(obj);
174 if (t->magic != VMALLOC_MAGIC) {
175 snd_printk(KERN_ERR "bad vfree (called from %p)\n", __builtin_return_address(0));
178 spin_lock(&snd_alloc_vmalloc_lock);
180 spin_unlock(&snd_alloc_vmalloc_lock);
182 snd_alloc_vmalloc -= t->size;
184 snd_wrapper_vfree(obj);
187 char *snd_hidden_kstrdup(const char *s, int flags)
195 buf = _snd_kmalloc(len, flags);
201 static void snd_memory_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
203 snd_iprintf(buffer, "kmalloc: %li bytes\n", snd_alloc_kmalloc);
204 snd_iprintf(buffer, "vmalloc: %li bytes\n", snd_alloc_vmalloc);
207 int __init snd_memory_info_init(void)
209 snd_info_entry_t *entry;
211 entry = snd_info_create_module_entry(THIS_MODULE, "meminfo", NULL);
213 entry->c.text.read_size = 256;
214 entry->c.text.read = snd_memory_info_read;
215 if (snd_info_register(entry) < 0) {
216 snd_info_free_entry(entry);
220 snd_memory_info_entry = entry;
224 int __exit snd_memory_info_done(void)
226 if (snd_memory_info_entry)
227 snd_info_unregister(snd_memory_info_entry);
231 #endif /* CONFIG_SND_DEBUG_MEMORY */
234 * copy_to_user_fromio - copy data from mmio-space to user-space
235 * @dst: the destination pointer on user-space
236 * @src: the source pointer on mmio
237 * @count: the data size to copy in bytes
239 * Copies the data from mmio-space to user-space.
241 * Returns zero if successful, or non-zero on failure.
243 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count)
245 #if defined(__i386__) || defined(CONFIG_SPARC32)
246 return copy_to_user(dst, (const void*)src, count) ? -EFAULT : 0;
253 memcpy_fromio(buf, (void __iomem *)src, c);
254 if (copy_to_user(dst, buf, c))
265 * copy_from_user_toio - copy data from user-space to mmio-space
266 * @dst: the destination pointer on mmio-space
267 * @src: the source pointer on user-space
268 * @count: the data size to copy in bytes
270 * Copies the data from user-space to mmio-space.
272 * Returns zero if successful, or non-zero on failure.
274 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count)
276 #if defined(__i386__) || defined(CONFIG_SPARC32)
277 return copy_from_user((void*)dst, src, count) ? -EFAULT : 0;
284 if (copy_from_user(buf, src, c))
286 memcpy_toio(dst, buf, c);