gus_mem.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  4 *  GUS's memory allocation routines / bottom layer
  5 */
  6
  7#include <linux/slab.h>
  8#include <linux/string.h>
  9#include <sound/core.h>
 10#include <sound/gus.h>
 11#include <sound/info.h>
 12
 13#ifdef CONFIG_SND_DEBUG
 14static void snd_gf1_mem_info_read(struct snd_info_entry *entry, 
 15				  struct snd_info_buffer *buffer);
 16#endif
 17
 18static struct snd_gf1_mem_block *
 19snd_gf1_mem_xalloc(struct snd_gf1_mem *alloc, struct snd_gf1_mem_block *block,
 20		   const char *name)
 21{
 22	struct snd_gf1_mem_block *pblock, *nblock;
 23
 24	nblock = kmalloc(sizeof(struct snd_gf1_mem_block), GFP_KERNEL);
 25	if (nblock == NULL)
 26		return NULL;
 27	*nblock = *block;
 28	nblock->name = kstrdup(name, GFP_KERNEL);
 29	if (!nblock->name) {
 30		kfree(nblock);
 31		return NULL;
 32	}
 33
 34	pblock = alloc->first;
 35	while (pblock) {
 36		if (pblock->ptr > nblock->ptr) {
 37			nblock->prev = pblock->prev;
 38			nblock->next = pblock;
 39			pblock->prev = nblock;
 40			if (pblock == alloc->first)
 41				alloc->first = nblock;
 42			else
 43				nblock->prev->next = nblock;
 44			return nblock;
 45		}
 46		pblock = pblock->next;
 47	}
 48	nblock->next = NULL;
 49	if (alloc->last == NULL) {
 50		nblock->prev = NULL;
 51		alloc->first = alloc->last = nblock;
 52	} else {
 53		nblock->prev = alloc->last;
 54		alloc->last->next = nblock;
 55		alloc->last = nblock;
 56	}
 57	return nblock;
 58}
 59
 60int snd_gf1_mem_xfree(struct snd_gf1_mem * alloc, struct snd_gf1_mem_block * block)
 61{
 62	if (block->share) {	/* ok.. shared block */
 63		block->share--;
 64		return 0;
 65	}
 66	if (alloc->first == block) {
 67		alloc->first = block->next;
 68		if (block->next)
 69			block->next->prev = NULL;
 70	} else {
 71		block->prev->next = block->next;
 72		if (block->next)
 73			block->next->prev = block->prev;
 74	}
 75	if (alloc->last == block) {
 76		alloc->last = block->prev;
 77		if (block->prev)
 78			block->prev->next = NULL;
 79	} else {
 80		block->next->prev = block->prev;
 81		if (block->prev)
 82			block->prev->next = block->next;
 83	}
 84	kfree(block->name);
 85	kfree(block);
 86	return 0;
 87}
 88
 89static struct snd_gf1_mem_block *snd_gf1_mem_look(struct snd_gf1_mem * alloc,
 90					     unsigned int address)
 91{
 92	struct snd_gf1_mem_block *block;
 93
 94	for (block = alloc->first; block; block = block->next) {
 95		if (block->ptr == address) {
 96			return block;
 97		}
 98	}
 99	return NULL;
100}
101
102static struct snd_gf1_mem_block *snd_gf1_mem_share(struct snd_gf1_mem * alloc,
103					      unsigned int *share_id)
104{
105	struct snd_gf1_mem_block *block;
106
107	if (!share_id[0] && !share_id[1] &&
108	    !share_id[2] && !share_id[3])
109		return NULL;
110	for (block = alloc->first; block; block = block->next)
111		if (!memcmp(share_id, block->share_id,
112				sizeof(block->share_id)))
113			return block;
114	return NULL;
115}
116
117static int snd_gf1_mem_find(struct snd_gf1_mem * alloc,
118			    struct snd_gf1_mem_block * block,
119			    unsigned int size, int w_16, int align)
120{
121	struct snd_gf1_bank_info *info = w_16 ? alloc->banks_16 : alloc->banks_8;
122	unsigned int idx, boundary;
123	int size1;
124	struct snd_gf1_mem_block *pblock;
125	unsigned int ptr1, ptr2;
126
127	if (w_16 && align < 2)
128		align = 2;
129	block->flags = w_16 ? SNDRV_GF1_MEM_BLOCK_16BIT : 0;
130	block->owner = SNDRV_GF1_MEM_OWNER_DRIVER;
131	block->share = 0;
132	block->share_id[0] = block->share_id[1] =
133	block->share_id[2] = block->share_id[3] = 0;
134	block->name = NULL;
135	block->prev = block->next = NULL;
136	for (pblock = alloc->first, idx = 0; pblock; pblock = pblock->next) {
137		while (pblock->ptr >= (boundary = info[idx].address + info[idx].size))
138			idx++;
139		while (pblock->ptr + pblock->size >= (boundary = info[idx].address + info[idx].size))
140			idx++;
141		ptr2 = boundary;
142		if (pblock->next) {
143			if (pblock->ptr + pblock->size == pblock->next->ptr)
144				continue;
145			if (pblock->next->ptr < boundary)
146				ptr2 = pblock->next->ptr;
147		}
148		ptr1 = ALIGN(pblock->ptr + pblock->size, align);
149		if (ptr1 >= ptr2)
150			continue;
151		size1 = ptr2 - ptr1;
152		if ((int)size <= size1) {
153			block->ptr = ptr1;
154			block->size = size;
155			return 0;
156		}
157	}
158	while (++idx < 4) {
159		if (size <= info[idx].size) {
160			/* I assume that bank address is already aligned.. */
161			block->ptr = info[idx].address;
162			block->size = size;
163			return 0;
164		}
165	}
166	return -ENOMEM;
167}
168
169struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owner,
170				       char *name, int size, int w_16, int align,
171				       unsigned int *share_id)
172{
173	struct snd_gf1_mem_block block, *nblock;
174
175	guard(mutex)(&alloc->memory_mutex);
176	if (share_id != NULL) {
177		nblock = snd_gf1_mem_share(alloc, share_id);
178		if (nblock != NULL) {
179			if (size != (int)nblock->size) {
180				/* TODO: remove in the future */
181				pr_err("%s - share: sizes differ\n", __func__);
182				goto __std;
183			}
184			nblock->share++;
185			return NULL;
186		}
187	}
188      __std:
189	if (snd_gf1_mem_find(alloc, &block, size, w_16, align) < 0)
190		return NULL;
191	if (share_id != NULL)
192		memcpy(&block.share_id, share_id, sizeof(block.share_id));
193	block.owner = owner;
194	nblock = snd_gf1_mem_xalloc(alloc, &block, name);
195	return nblock;
196}
197
198int snd_gf1_mem_free(struct snd_gf1_mem * alloc, unsigned int address)
199{
200	struct snd_gf1_mem_block *block;
201
202	guard(mutex)(&alloc->memory_mutex);
203	block = snd_gf1_mem_look(alloc, address);
204	if (block)
205		return snd_gf1_mem_xfree(alloc, block);
206	return -EINVAL;
207}
208
209int snd_gf1_mem_init(struct snd_gus_card * gus)
210{
211	struct snd_gf1_mem *alloc;
212	struct snd_gf1_mem_block block;
213
214	alloc = &gus->gf1.mem_alloc;
215	mutex_init(&alloc->memory_mutex);
216	alloc->first = alloc->last = NULL;
217	if (!gus->gf1.memory)
218		return 0;
219
220	memset(&block, 0, sizeof(block));
221	block.owner = SNDRV_GF1_MEM_OWNER_DRIVER;
222	if (gus->gf1.enh_mode) {
223		block.ptr = 0;
224		block.size = 1024;
225		if (!snd_gf1_mem_xalloc(alloc, &block, "InterWave LFOs"))
226			return -ENOMEM;
227	}
228	block.ptr = gus->gf1.default_voice_address;
229	block.size = 4;
230	if (!snd_gf1_mem_xalloc(alloc, &block, "Voice default (NULL's)"))
231		return -ENOMEM;
232#ifdef CONFIG_SND_DEBUG
233	snd_card_ro_proc_new(gus->card, "gusmem", gus, snd_gf1_mem_info_read);
234#endif
235	return 0;
236}
237
238int snd_gf1_mem_done(struct snd_gus_card * gus)
239{
240	struct snd_gf1_mem *alloc;
241	struct snd_gf1_mem_block *block, *nblock;
242
243	alloc = &gus->gf1.mem_alloc;
244	block = alloc->first;
245	while (block) {
246		nblock = block->next;
247		snd_gf1_mem_xfree(alloc, block);
248		block = nblock;
249	}
250	return 0;
251}
252
253#ifdef CONFIG_SND_DEBUG
254static void snd_gf1_mem_info_read(struct snd_info_entry *entry, 
255				  struct snd_info_buffer *buffer)
256{
257	struct snd_gus_card *gus;
258	struct snd_gf1_mem *alloc;
259	struct snd_gf1_mem_block *block;
260	unsigned int total, used;
261	int i;
262
263	gus = entry->private_data;
264	alloc = &gus->gf1.mem_alloc;
265	guard(mutex)(&alloc->memory_mutex);
266	snd_iprintf(buffer, "8-bit banks       : \n    ");
267	for (i = 0; i < 4; i++)
268		snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_8[i].address, alloc->banks_8[i].size >> 10, i + 1 < 4 ? "," : "");
269	snd_iprintf(buffer, "\n"
270		    "16-bit banks      : \n    ");
271	for (i = total = 0; i < 4; i++) {
272		snd_iprintf(buffer, "0x%06x (%04ik)%s", alloc->banks_16[i].address, alloc->banks_16[i].size >> 10, i + 1 < 4 ? "," : "");
273		total += alloc->banks_16[i].size;
274	}
275	snd_iprintf(buffer, "\n");
276	used = 0;
277	for (block = alloc->first, i = 0; block; block = block->next, i++) {
278		used += block->size;
279		snd_iprintf(buffer, "Block %i onboard 0x%x size %i (0x%x):\n", i, block->ptr, block->size, block->size);
280		if (block->share ||
281		    block->share_id[0] || block->share_id[1] ||
282		    block->share_id[2] || block->share_id[3])
283			snd_iprintf(buffer, "  Share           : %i [id0 0x%x] [id1 0x%x] [id2 0x%x] [id3 0x%x]\n",
284				block->share,
285				block->share_id[0], block->share_id[1],
286				block->share_id[2], block->share_id[3]);
287		snd_iprintf(buffer, "  Flags           :%s\n",
288		block->flags & SNDRV_GF1_MEM_BLOCK_16BIT ? " 16-bit" : "");
289		snd_iprintf(buffer, "  Owner           : ");
290		switch (block->owner) {
291		case SNDRV_GF1_MEM_OWNER_DRIVER:
292			snd_iprintf(buffer, "driver - %s\n", block->name);
293			break;
294		case SNDRV_GF1_MEM_OWNER_WAVE_SIMPLE:
295			snd_iprintf(buffer, "SIMPLE wave\n");
296			break;
297		case SNDRV_GF1_MEM_OWNER_WAVE_GF1:
298			snd_iprintf(buffer, "GF1 wave\n");
299			break;
300		case SNDRV_GF1_MEM_OWNER_WAVE_IWFFFF:
301			snd_iprintf(buffer, "IWFFFF wave\n");
302			break;
303		default:
304			snd_iprintf(buffer, "unknown\n");
305		}
306	}
307	snd_iprintf(buffer, "  Total: memory = %i, used = %i, free = %i\n",
308		    total, used, total - used);
309#if 0
310	ultra_iprintf(buffer, "  Verify: free = %i, max 8-bit block = %i, max 16-bit block = %i\n",
311		      ultra_memory_free_size(card, &card->gf1.mem_alloc),
312		  ultra_memory_free_block(card, &card->gf1.mem_alloc, 0),
313		 ultra_memory_free_block(card, &card->gf1.mem_alloc, 1));
314#endif
315}
316#endif