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11#include <linux/io.h>
12#include <linux/pci.h>
13#include <linux/time.h>
14#include <linux/mutex.h>
15
16#include <sound/core.h>
17#include "trident.h"
18
19
20
21
22#define __set_tlb_bus(trident,page,addr) \
23 (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1))
24#define __tlb_to_addr(trident,page) \
25 (dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
26
27#if PAGE_SIZE == 4096
28
29#define ALIGN_PAGE_SIZE PAGE_SIZE
30#define MAX_ALIGN_PAGES SNDRV_TRIDENT_MAX_PAGES
31
32#define set_tlb_bus(trident,page,addr) __set_tlb_bus(trident,page,addr)
33
34#define set_silent_tlb(trident,page) __set_tlb_bus(trident, page, trident->tlb.silent_page.addr)
35
36#define get_aligned_page(offset) ((offset) >> 12)
37
38#define aligned_page_offset(page) ((page) << 12)
39
40#define page_to_addr(trident,page) __tlb_to_addr(trident, page)
41
42#elif PAGE_SIZE == 8192
43
44#define ALIGN_PAGE_SIZE PAGE_SIZE
45#define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / 2)
46#define get_aligned_page(offset) ((offset) >> 13)
47#define aligned_page_offset(page) ((page) << 13)
48#define page_to_addr(trident,page) __tlb_to_addr(trident, (page) << 1)
49
50
51static inline void set_tlb_bus(struct snd_trident *trident, int page,
52 dma_addr_t addr)
53{
54 page <<= 1;
55 __set_tlb_bus(trident, page, addr);
56 __set_tlb_bus(trident, page+1, addr + SNDRV_TRIDENT_PAGE_SIZE);
57}
58static inline void set_silent_tlb(struct snd_trident *trident, int page)
59{
60 page <<= 1;
61 __set_tlb_bus(trident, page, trident->tlb.silent_page.addr);
62 __set_tlb_bus(trident, page+1, trident->tlb.silent_page.addr);
63}
64
65#else
66
67#define UNIT_PAGES (PAGE_SIZE / SNDRV_TRIDENT_PAGE_SIZE)
68#define ALIGN_PAGE_SIZE (SNDRV_TRIDENT_PAGE_SIZE * UNIT_PAGES)
69#define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / UNIT_PAGES)
70
71
72
73
74
75#define get_aligned_page(offset) ((offset) / ALIGN_PAGE_SIZE)
76#define aligned_page_offset(page) ((page) * ALIGN_PAGE_SIZE)
77#define page_to_addr(trident,page) __tlb_to_addr(trident, (page) * UNIT_PAGES)
78
79
80static inline void set_tlb_bus(struct snd_trident *trident, int page,
81 dma_addr_t addr)
82{
83 int i;
84 page *= UNIT_PAGES;
85 for (i = 0; i < UNIT_PAGES; i++, page++) {
86 __set_tlb_bus(trident, page, addr);
87 addr += SNDRV_TRIDENT_PAGE_SIZE;
88 }
89}
90static inline void set_silent_tlb(struct snd_trident *trident, int page)
91{
92 int i;
93 page *= UNIT_PAGES;
94 for (i = 0; i < UNIT_PAGES; i++, page++)
95 __set_tlb_bus(trident, page, trident->tlb.silent_page.addr);
96}
97
98#endif
99
100
101#define firstpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->first_page)
102#define lastpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->last_page)
103
104
105
106
107static struct snd_util_memblk *
108search_empty(struct snd_util_memhdr *hdr, int size)
109{
110 struct snd_util_memblk *blk;
111 int page, psize;
112 struct list_head *p;
113
114 psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1);
115 page = 0;
116 list_for_each(p, &hdr->block) {
117 blk = list_entry(p, struct snd_util_memblk, list);
118 if (page + psize <= firstpg(blk))
119 goto __found_pages;
120 page = lastpg(blk) + 1;
121 }
122 if (page + psize > MAX_ALIGN_PAGES)
123 return NULL;
124
125__found_pages:
126
127 blk = __snd_util_memblk_new(hdr, psize * ALIGN_PAGE_SIZE, p->prev);
128 if (blk == NULL)
129 return NULL;
130 blk->offset = aligned_page_offset(page);
131 firstpg(blk) = page;
132 lastpg(blk) = page + psize - 1;
133 return blk;
134}
135
136
137
138
139
140static int is_valid_page(unsigned long ptr)
141{
142 if (ptr & ~0x3fffffffUL) {
143 snd_printk(KERN_ERR "max memory size is 1GB!!\n");
144 return 0;
145 }
146 if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) {
147 snd_printk(KERN_ERR "page is not aligned\n");
148 return 0;
149 }
150 return 1;
151}
152
153
154
155
156static struct snd_util_memblk *
157snd_trident_alloc_sg_pages(struct snd_trident *trident,
158 struct snd_pcm_substream *substream)
159{
160 struct snd_util_memhdr *hdr;
161 struct snd_util_memblk *blk;
162 struct snd_pcm_runtime *runtime = substream->runtime;
163 int idx, page;
164
165 if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
166 runtime->dma_bytes > SNDRV_TRIDENT_MAX_PAGES *
167 SNDRV_TRIDENT_PAGE_SIZE))
168 return NULL;
169 hdr = trident->tlb.memhdr;
170 if (snd_BUG_ON(!hdr))
171 return NULL;
172
173
174
175 mutex_lock(&hdr->block_mutex);
176 blk = search_empty(hdr, runtime->dma_bytes);
177 if (blk == NULL) {
178 mutex_unlock(&hdr->block_mutex);
179 return NULL;
180 }
181
182
183 idx = 0;
184 for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
185 unsigned long ofs = idx << PAGE_SHIFT;
186 dma_addr_t addr = snd_pcm_sgbuf_get_addr(substream, ofs);
187 if (! is_valid_page(addr)) {
188 __snd_util_mem_free(hdr, blk);
189 mutex_unlock(&hdr->block_mutex);
190 return NULL;
191 }
192 set_tlb_bus(trident, page, addr);
193 }
194 mutex_unlock(&hdr->block_mutex);
195 return blk;
196}
197
198
199
200
201static struct snd_util_memblk *
202snd_trident_alloc_cont_pages(struct snd_trident *trident,
203 struct snd_pcm_substream *substream)
204{
205 struct snd_util_memhdr *hdr;
206 struct snd_util_memblk *blk;
207 int page;
208 struct snd_pcm_runtime *runtime = substream->runtime;
209 dma_addr_t addr;
210
211 if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
212 runtime->dma_bytes > SNDRV_TRIDENT_MAX_PAGES *
213 SNDRV_TRIDENT_PAGE_SIZE))
214 return NULL;
215 hdr = trident->tlb.memhdr;
216 if (snd_BUG_ON(!hdr))
217 return NULL;
218
219 mutex_lock(&hdr->block_mutex);
220 blk = search_empty(hdr, runtime->dma_bytes);
221 if (blk == NULL) {
222 mutex_unlock(&hdr->block_mutex);
223 return NULL;
224 }
225
226
227 addr = runtime->dma_addr;
228 for (page = firstpg(blk); page <= lastpg(blk); page++,
229 addr += SNDRV_TRIDENT_PAGE_SIZE) {
230 if (! is_valid_page(addr)) {
231 __snd_util_mem_free(hdr, blk);
232 mutex_unlock(&hdr->block_mutex);
233 return NULL;
234 }
235 set_tlb_bus(trident, page, addr);
236 }
237 mutex_unlock(&hdr->block_mutex);
238 return blk;
239}
240
241
242
243
244struct snd_util_memblk *
245snd_trident_alloc_pages(struct snd_trident *trident,
246 struct snd_pcm_substream *substream)
247{
248 if (snd_BUG_ON(!trident || !substream))
249 return NULL;
250 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_SG)
251 return snd_trident_alloc_sg_pages(trident, substream);
252 else
253 return snd_trident_alloc_cont_pages(trident, substream);
254}
255
256
257
258
259
260int snd_trident_free_pages(struct snd_trident *trident,
261 struct snd_util_memblk *blk)
262{
263 struct snd_util_memhdr *hdr;
264 int page;
265
266 if (snd_BUG_ON(!trident || !blk))
267 return -EINVAL;
268
269 hdr = trident->tlb.memhdr;
270 mutex_lock(&hdr->block_mutex);
271
272 for (page = firstpg(blk); page <= lastpg(blk); page++)
273 set_silent_tlb(trident, page);
274
275 __snd_util_mem_free(hdr, blk);
276 mutex_unlock(&hdr->block_mutex);
277 return 0;
278}
279