[ALSA] semaphore -> mutex (ISA part)
[linux-2.6.git] / sound / isa / gus / gus_mem.c
1 /*
2  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3  *  GUS's memory allocation routines / bottom layer
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
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  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #include <sound/driver.h>
23 #include <linux/slab.h>
24 #include <linux/string.h>
25 #include <sound/core.h>
26 #include <sound/gus.h>
27 #include <sound/info.h>
28
29 #ifdef CONFIG_SND_DEBUG
30 static void snd_gf1_mem_info_read(struct snd_info_entry *entry, 
31                                   struct snd_info_buffer *buffer);
32 #endif
33
34 void snd_gf1_mem_lock(struct snd_gf1_mem * alloc, int xup)
35 {
36         if (!xup) {
37                 mutex_lock(&alloc->memory_mutex);
38         } else {
39                 mutex_unlock(&alloc->memory_mutex);
40         }
41 }
42
43 static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc,
44                                                struct snd_gf1_mem_block * block)
45 {
46         struct snd_gf1_mem_block *pblock, *nblock;
47
48         nblock = kmalloc(sizeof(struct snd_gf1_mem_block), GFP_KERNEL);
49         if (nblock == NULL)
50                 return NULL;
51         *nblock = *block;
52         pblock = alloc->first;
53         while (pblock) {
54                 if (pblock->ptr > nblock->ptr) {
55                         nblock->prev = pblock->prev;
56                         nblock->next = pblock;
57                         pblock->prev = nblock;
58                         if (pblock == alloc->first)
59                                 alloc->first = nblock;
60                         else
61                                 nblock->prev->next = nblock;
62                         mutex_unlock(&alloc->memory_mutex);
63                         return NULL;
64                 }
65                 pblock = pblock->next;
66         }
67         nblock->next = NULL;
68         if (alloc->last == NULL) {
69                 nblock->prev = NULL;
70                 alloc->first = alloc->last = nblock;
71         } else {
72                 nblock->prev = alloc->last;
73                 alloc->last->next = nblock;
74                 alloc->last = nblock;
75         }
76         return nblock;
77 }
78
79 int snd_gf1_mem_xfree(struct snd_gf1_mem * alloc, struct snd_gf1_mem_block * block)
80 {
81         if (block->share) {     /* ok.. shared block */
82                 block->share--;
83                 mutex_unlock(&alloc->memory_mutex);
84                 return 0;
85         }
86         if (alloc->first == block) {
87                 alloc->first = block->next;
88                 if (block->next)
89                         block->next->prev = NULL;
90         } else {
91                 block->prev->next = block->next;
92                 if (block->next)
93                         block->next->prev = block->prev;
94         }
95         if (alloc->last == block) {
96                 alloc->last = block->prev;
97                 if (block->prev)
98                         block->prev->next = NULL;
99         } else {
100                 block->next->prev = block->prev;
101                 if (block->prev)
102                         block->prev->next = block->next;
103         }
104         kfree(block->name);
105         kfree(block);
106         return 0;
107 }
108
109 static struct snd_gf1_mem_block *snd_gf1_mem_look(struct snd_gf1_mem * alloc,
110                                              unsigned int address)
111 {
112         struct snd_gf1_mem_block *block;
113
114         for (block = alloc->first; block; block = block->next) {
115                 if (block->ptr == address) {
116                         return block;
117                 }
118         }
119         return NULL;
120 }
121
122 static struct snd_gf1_mem_block *snd_gf1_mem_share(struct snd_gf1_mem * alloc,
123                                               unsigned int *share_id)
124 {
125         struct snd_gf1_mem_block *block;
126
127         if (!share_id[0] && !share_id[1] &&
128             !share_id[2] && !share_id[3])
129                 return NULL;
130         for (block = alloc->first; block; block = block->next)
131                 if (!memcmp(share_id, block->share_id, sizeof(share_id)))
132                         return block;
133         return NULL;
134 }
135
136 static int snd_gf1_mem_find(struct snd_gf1_mem * alloc,
137                             struct snd_gf1_mem_block * block,
138                             unsigned int size, int w_16, int align)
139 {
140         struct snd_gf1_bank_info *info = w_16 ? alloc->banks_16 : alloc->banks_8;
141         unsigned int idx, boundary;
142         int size1;
143         struct snd_gf1_mem_block *pblock;
144         unsigned int ptr1, ptr2;
145
146         align--;
147         if (w_16 && align < 1)
148                 align = 1;
149         block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
150         block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
151         block->share = 0;
152         block->share_id[0] = block->share_id[1] =
153         block->share_id[2] = block->share_id[3] = 0;
154         block->name = NULL;
155         block->prev = block->next = NULL;
156         for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
157                 while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
158                         idx++;
159                 while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
160                         idx++;
161                 ptr2 = boundary;
162                 if (pblock->next) {
163                         if (pblock->ptr + pblock->size == pblock->next->ptr)
164                                 continue;
165                         if (pblock->next->ptr < boundary)
166                                 ptr2 = pblock->next->ptr;
167                 }
168                 ptr1 = (pblock->ptr + pblock->size + align) & ~align;
169                 if (ptr1 >= ptr2)
170                         continue;
171                 size1 = ptr2 - ptr1;
172                 if ((int)size <= size1) {
173                         block->ptr = ptr1;
174                         block->size = size;
175                         return 0;
176                 }
177         }
178         while (++idx < 4) {
179                 if (size <= info[idx].size) {
180                         /* I assume that bank address is already aligned.. */
181                         block->ptr = info[idx].address;
182                         block->size = size;
183                         return 0;
184                 }
185         }
186         return -ENOMEM;
187 }
188
189 struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owner,
190                                        char *name, int size, int w_16, int align,
191                                        unsigned int *share_id)
192 {
193         struct snd_gf1_mem_block block, *nblock;
194
195         snd_gf1_mem_lock(alloc, 0);
196         if (share_id != NULL) {
197                 nblock = snd_gf1_mem_share(alloc, share_id);
198                 if (nblock != NULL) {
199                         if (size != (int)nblock->size) {
200                                 /* TODO: remove in the future */
201                                 snd_printk(KERN_ERR "snd_gf1_mem_alloc - share: sizes differ\n");
202                                 goto __std;
203                         }
204                         nblock->share++;
205                         snd_gf1_mem_lock(alloc, 1);
206                         return NULL;
207                 }
208         }
209       __std:
210         if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0) {
211                 snd_gf1_mem_lock(alloc, 1);
212                 return NULL;
213         }
214         if (share_id != NULL)
215                 memcpy(&block.share_id, share_id, sizeof(block.share_id));
216         block.owner = owner;
217         block.name = kstrdup(name, GFP_KERNEL);
218         nblock = snd_gf1_mem_xalloc(alloc, &block);
219         snd_gf1_mem_lock(alloc, 1);
220         return nblock;
221 }
222
223 int snd_gf1_mem_free(struct snd_gf1_mem * alloc, unsigned int address)
224 {
225         int result;
226         struct snd_gf1_mem_block *block;
227
228         snd_gf1_mem_lock(alloc, 0);
229         if ((block = snd_gf1_mem_look(alloc, address)) != NULL) {
230                 result = snd_gf1_mem_xfree(alloc, block);
231                 snd_gf1_mem_lock(alloc, 1);
232                 return result;
233         }
234         snd_gf1_mem_lock(alloc, 1);
235         return -EINVAL;
236 }
237
238 int snd_gf1_mem_init(struct snd_gus_card * gus)
239 {
240         struct snd_gf1_mem *alloc;
241         struct snd_gf1_mem_block block;
242 #ifdef CONFIG_SND_DEBUG
243         struct snd_info_entry *entry;
244 #endif
245
246         alloc = &gus->gf1.mem_alloc;
247         mutex_init(&alloc->memory_mutex);
248         alloc->first = alloc->last = NULL;
249         if (!gus->gf1.memory)
250                 return 0;
251
252         memset(&block, 0, sizeof(block));
253         block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
254         if (gus->gf1.enh_mode) {
255                 block.ptr = 0;
256                 block.size = 1024;
257                 block.name = kstrdup("InterWave LFOs", GFP_KERNEL);
258                 if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
259                         return -ENOMEM;
260         }
261         block.ptr = gus->gf1.default_voice_address;
262         block.size = 4;
263         block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL);
264         if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
265                 return -ENOMEM;
266 #ifdef CONFIG_SND_DEBUG
267         if (! snd_card_proc_new(gus->card, "gusmem", &entry)) {
268                 snd_info_set_text_ops(entry, gus, 1024, snd_gf1_mem_info_read);
269                 entry->c.text.read_size = 256 * 1024;
270         }
271 #endif
272         return 0;
273 }
274
275 int snd_gf1_mem_done(struct snd_gus_card * gus)
276 {
277         struct snd_gf1_mem *alloc;
278         struct snd_gf1_mem_block *block, *nblock;
279
280         alloc = &gus->gf1.mem_alloc;
281         block = alloc->first;
282         while (block) {
283                 nblock = block->next;
284                 snd_gf1_mem_xfree(alloc, block);
285                 block = nblock;
286         }
287         return 0;
288 }
289
290 #ifdef CONFIG_SND_DEBUG
291 static void snd_gf1_mem_info_read(struct snd_info_entry *entry, 
292                                   struct snd_info_buffer *buffer)
293 {
294         struct snd_gus_card *gus;
295         struct snd_gf1_mem *alloc;
296         struct snd_gf1_mem_block *block;
297         unsigned int total, used;
298         int i;
299
300         gus = entry->private_data;
301         alloc = &gus->gf1.mem_alloc;
302         mutex_lock(&alloc->memory_mutex);
303         snd_iprintf(buffer, "8-bit banks       : \n    ");
304         for (i = 0; i < 4; i++)
305                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
306         snd_iprintf(buffer, "\n"
307                     "16-bit banks      : \n    ");
308         for (i = total = 0; i < 4; i++) {
309                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
310                 total += alloc->banks_16[i].size;
311         }
312         snd_iprintf(buffer, "\n");
313         used = 0;
314         for (block = alloc->first, i = 0; block; block = block->next, i++) {
315                 used += block->size;
316                 snd_iprintf(buffer, "Block %i at 0x%lx onboard 0x%x size %i (0x%x):\n", i, (long) block, block->ptr, block->size, block->size);
317                 if (block->share ||
318                     block->share_id[0] || block->share_id[1] ||
319                     block->share_id[2] || block->share_id[3])
320                         snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
321                                 block->share,
322                                 block->share_id[0], block->share_id[1],
323                                 block->share_id[2], block->share_id[3]);
324                 snd_iprintf(buffer, "  Flags           :%s\n",
325                 block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
326                 snd_iprintf(buffer, "  Owner           : ");
327                 switch (block->owner) {
328                 case SNDRV_GF1_MEM_OWNER_DRIVER:
329                         snd_iprintf(buffer, "driver - %s\n", block->name);
330                         break;
331                 case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
332                         snd_iprintf(buffer, "SIMPLE wave\n");
333                         break;
334                 case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
335                         snd_iprintf(buffer, "GF1 wave\n");
336                         break;
337                 case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
338                         snd_iprintf(buffer, "IWFFFF wave\n");
339                         break;
340                 default:
341                         snd_iprintf(buffer, "unknown\n");
342                 }
343         }
344         snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
345                     total, used, total - used);
346         mutex_unlock(&alloc->memory_mutex);
347 #if 0
348         ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
349                       ultra_memory_free_size(card, &card->gf1.mem_alloc),
350                   ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
351                  ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
352 #endif
353 }
354 #endif