Linux-2.6.12-rc2
[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 <sound/core.h>
25 #include <sound/gus.h>
26 #include <sound/info.h>
27
28 #ifdef CONFIG_SND_DEBUG
29 static void snd_gf1_mem_info_read(snd_info_entry_t *entry, 
30                                   snd_info_buffer_t * buffer);
31 #endif
32
33 void snd_gf1_mem_lock(snd_gf1_mem_t * alloc, int xup)
34 {
35         if (!xup) {
36                 down(&alloc->memory_mutex);
37         } else {
38                 up(&alloc->memory_mutex);
39         }
40 }
41
42 snd_gf1_mem_block_t *snd_gf1_mem_xalloc(snd_gf1_mem_t * alloc,
43                                         snd_gf1_mem_block_t * block)
44 {
45         snd_gf1_mem_block_t *pblock, *nblock;
46
47         nblock = (snd_gf1_mem_block_t *) kmalloc(sizeof(snd_gf1_mem_block_t), GFP_KERNEL);
48         if (nblock == NULL)
49                 return NULL;
50         *nblock = *block;
51         pblock = alloc->first;
52         while (pblock) {
53                 if (pblock->ptr > nblock->ptr) {
54                         nblock->prev = pblock->prev;
55                         nblock->next = pblock;
56                         pblock->prev = nblock;
57                         if (pblock == alloc->first)
58                                 alloc->first = nblock;
59                         else
60                                 nblock->prev->next = nblock;
61                         up(&alloc->memory_mutex);
62                         return NULL;
63                 }
64                 pblock = pblock->next;
65         }
66         nblock->next = NULL;
67         if (alloc->last == NULL) {
68                 nblock->prev = NULL;
69                 alloc->first = alloc->last = nblock;
70         } else {
71                 nblock->prev = alloc->last;
72                 alloc->last->next = nblock;
73                 alloc->last = nblock;
74         }
75         return nblock;
76 }
77
78 int snd_gf1_mem_xfree(snd_gf1_mem_t * alloc, snd_gf1_mem_block_t * block)
79 {
80         if (block->share) {     /* ok.. shared block */
81                 block->share--;
82                 up(&alloc->memory_mutex);
83                 return 0;
84         }
85         if (alloc->first == block) {
86                 alloc->first = block->next;
87                 if (block->next)
88                         block->next->prev = NULL;
89         } else {
90                 block->prev->next = block->next;
91                 if (block->next)
92                         block->next->prev = block->prev;
93         }
94         if (alloc->last == block) {
95                 alloc->last = block->prev;
96                 if (block->prev)
97                         block->prev->next = NULL;
98         } else {
99                 block->next->prev = block->prev;
100                 if (block->prev)
101                         block->prev->next = block->next;
102         }
103         kfree(block->name);
104         kfree(block);
105         return 0;
106 }
107
108 snd_gf1_mem_block_t *snd_gf1_mem_look(snd_gf1_mem_t * alloc,
109                                       unsigned int address)
110 {
111         snd_gf1_mem_block_t *block;
112
113         for (block = alloc->first; block; block = block->next) {
114                 if (block->ptr == address) {
115                         return block;
116                 }
117         }
118         return NULL;
119 }
120
121 snd_gf1_mem_block_t *snd_gf1_mem_share(snd_gf1_mem_t * alloc,
122                                        unsigned int *share_id)
123 {
124         snd_gf1_mem_block_t *block;
125
126         if (!share_id[0] && !share_id[1] &&
127             !share_id[2] && !share_id[3])
128                 return NULL;
129         for (block = alloc->first; block; block = block->next)
130                 if (!memcmp(share_id, block->share_id, sizeof(share_id)))
131                         return block;
132         return NULL;
133 }
134
135 static int snd_gf1_mem_find(snd_gf1_mem_t * alloc,
136                             snd_gf1_mem_block_t * block,
137                             unsigned int size, int w_16, int align)
138 {
139         snd_gf1_bank_info_t *info = w_16 ? alloc->banks_16 : alloc->banks_8;
140         unsigned int idx, boundary;
141         int size1;
142         snd_gf1_mem_block_t *pblock;
143         unsigned int ptr1, ptr2;
144
145         align--;
146         if (w_16 && align < 1)
147                 align = 1;
148         block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
149         block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
150         block->share = 0;
151         block->share_id[0] = block->share_id[1] =
152         block->share_id[2] = block->share_id[3] = 0;
153         block->name = NULL;
154         block->prev = block->next = NULL;
155         for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
156                 while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
157                         idx++;
158                 while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
159                         idx++;
160                 ptr2 = boundary;
161                 if (pblock->next) {
162                         if (pblock->ptr + pblock->size == pblock->next->ptr)
163                                 continue;
164                         if (pblock->next->ptr < boundary)
165                                 ptr2 = pblock->next->ptr;
166                 }
167                 ptr1 = (pblock->ptr + pblock->size + align) & ~align;
168                 if (ptr1 >= ptr2)
169                         continue;
170                 size1 = ptr2 - ptr1;
171                 if ((int)size <= size1) {
172                         block->ptr = ptr1;
173                         block->size = size;
174                         return 0;
175                 }
176         }
177         while (++idx < 4) {
178                 if (size <= info[idx].size) {
179                         /* I assume that bank address is already aligned.. */
180                         block->ptr = info[idx].address;
181                         block->size = size;
182                         return 0;
183                 }
184         }
185         return -ENOMEM;
186 }
187
188 snd_gf1_mem_block_t *snd_gf1_mem_alloc(snd_gf1_mem_t * alloc, int owner,
189                                        char *name, int size, int w_16, int align,
190                                        unsigned int *share_id)
191 {
192         snd_gf1_mem_block_t block, *nblock;
193
194         snd_gf1_mem_lock(alloc, 0);
195         if (share_id != NULL) {
196                 nblock = snd_gf1_mem_share(alloc, share_id);
197                 if (nblock != NULL) {
198                         if (size != (int)nblock->size) {
199                                 /* TODO: remove in the future */
200                                 snd_printk("snd_gf1_mem_alloc - share: sizes differ\n");
201                                 goto __std;
202                         }
203                         nblock->share++;
204                         snd_gf1_mem_lock(alloc, 1);
205                         return NULL;
206                 }
207         }
208       __std:
209         if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0) {
210                 snd_gf1_mem_lock(alloc, 1);
211                 return NULL;
212         }
213         if (share_id != NULL)
214                 memcpy(&block.share_id, share_id, sizeof(block.share_id));
215         block.owner = owner;
216         block.name = snd_kmalloc_strdup(name, GFP_KERNEL);
217         nblock = snd_gf1_mem_xalloc(alloc, &block);
218         snd_gf1_mem_lock(alloc, 1);
219         return nblock;
220 }
221
222 int snd_gf1_mem_free(snd_gf1_mem_t * alloc, unsigned int address)
223 {
224         int result;
225         snd_gf1_mem_block_t *block;
226
227         snd_gf1_mem_lock(alloc, 0);
228         if ((block = snd_gf1_mem_look(alloc, address)) != NULL) {
229                 result = snd_gf1_mem_xfree(alloc, block);
230                 snd_gf1_mem_lock(alloc, 1);
231                 return result;
232         }
233         snd_gf1_mem_lock(alloc, 1);
234         return -EINVAL;
235 }
236
237 int snd_gf1_mem_init(snd_gus_card_t * gus)
238 {
239         snd_gf1_mem_t *alloc;
240         snd_gf1_mem_block_t block;
241 #ifdef CONFIG_SND_DEBUG
242         snd_info_entry_t *entry;
243 #endif
244
245         alloc = &gus->gf1.mem_alloc;
246         init_MUTEX(&alloc->memory_mutex);
247         alloc->first = alloc->last = NULL;
248         if (!gus->gf1.memory)
249                 return 0;
250
251         memset(&block, 0, sizeof(block));
252         block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
253         if (gus->gf1.enh_mode) {
254                 block.ptr = 0;
255                 block.size = 1024;
256                 block.name = snd_kmalloc_strdup("InterWave LFOs", GFP_KERNEL);
257                 if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
258                         return -ENOMEM;
259         }
260         block.ptr = gus->gf1.default_voice_address;
261         block.size = 4;
262         block.name = snd_kmalloc_strdup("Voice default (NULL's)", GFP_KERNEL);
263         if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
264                 return -ENOMEM;
265 #ifdef CONFIG_SND_DEBUG
266         if (! snd_card_proc_new(gus->card, "gusmem", &entry)) {
267                 snd_info_set_text_ops(entry, gus, 1024, snd_gf1_mem_info_read);
268                 entry->c.text.read_size = 256 * 1024;
269         }
270 #endif
271         return 0;
272 }
273
274 int snd_gf1_mem_done(snd_gus_card_t * gus)
275 {
276         snd_gf1_mem_t *alloc;
277         snd_gf1_mem_block_t *block, *nblock;
278
279         alloc = &gus->gf1.mem_alloc;
280         block = alloc->first;
281         while (block) {
282                 nblock = block->next;
283                 snd_gf1_mem_xfree(alloc, block);
284                 block = nblock;
285         }
286         return 0;
287 }
288
289 #ifdef CONFIG_SND_DEBUG
290 static void snd_gf1_mem_info_read(snd_info_entry_t *entry, 
291                                   snd_info_buffer_t * buffer)
292 {
293         snd_gus_card_t *gus;
294         snd_gf1_mem_t *alloc;
295         snd_gf1_mem_block_t *block;
296         unsigned int total, used;
297         int i;
298
299         gus = entry->private_data;
300         alloc = &gus->gf1.mem_alloc;
301         down(&alloc->memory_mutex);
302         snd_iprintf(buffer, "8-bit banks       : \n    ");
303         for (i = 0; i < 4; i++)
304                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
305         snd_iprintf(buffer, "\n"
306                     "16-bit banks      : \n    ");
307         for (i = total = 0; i < 4; i++) {
308                 snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
309                 total += alloc->banks_16[i].size;
310         }
311         snd_iprintf(buffer, "\n");
312         used = 0;
313         for (block = alloc->first, i = 0; block; block = block->next, i++) {
314                 used += block->size;
315                 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);
316                 if (block->share ||
317                     block->share_id[0] || block->share_id[1] ||
318                     block->share_id[2] || block->share_id[3])
319                         snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
320                                 block->share,
321                                 block->share_id[0], block->share_id[1],
322                                 block->share_id[2], block->share_id[3]);
323                 snd_iprintf(buffer, "  Flags           :%s\n",
324                 block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
325                 snd_iprintf(buffer, "  Owner           : ");
326                 switch (block->owner) {
327                 case SNDRV_GF1_MEM_OWNER_DRIVER:
328                         snd_iprintf(buffer, "driver - %s\n", block->name);
329                         break;
330                 case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
331                         snd_iprintf(buffer, "SIMPLE wave\n");
332                         break;
333                 case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
334                         snd_iprintf(buffer, "GF1 wave\n");
335                         break;
336                 case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
337                         snd_iprintf(buffer, "IWFFFF wave\n");
338                         break;
339                 default:
340                         snd_iprintf(buffer, "unknown\n");
341                 }
342         }
343         snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
344                     total, used, total - used);
345         up(&alloc->memory_mutex);
346 #if 0
347         ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
348                       ultra_memory_free_size(card, &card->gf1.mem_alloc),
349                   ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
350                  ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
351 #endif
352 }
353 #endif