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1da177e4 LT |
1 | /* |
2 | ** PARISC 1.1 Dynamic DMA mapping support. | |
3 | ** This implementation is for PA-RISC platforms that do not support | |
4 | ** I/O TLBs (aka DMA address translation hardware). | |
5 | ** See Documentation/DMA-mapping.txt for interface definitions. | |
6 | ** | |
7 | ** (c) Copyright 1999,2000 Hewlett-Packard Company | |
8 | ** (c) Copyright 2000 Grant Grundler | |
9 | ** (c) Copyright 2000 Philipp Rumpf <prumpf@tux.org> | |
10 | ** (c) Copyright 2000 John Marvin | |
11 | ** | |
12 | ** "leveraged" from 2.3.47: arch/ia64/kernel/pci-dma.c. | |
13 | ** (I assume it's from David Mosberger-Tang but there was no Copyright) | |
14 | ** | |
15 | ** AFAIK, all PA7100LC and PA7300LC platforms can use this code. | |
16 | ** | |
17 | ** - ggg | |
18 | */ | |
19 | ||
20 | #include <linux/init.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/pci.h> | |
23 | #include <linux/proc_fs.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/types.h> | |
27 | ||
28 | #include <asm/cacheflush.h> | |
29 | #include <asm/dma.h> /* for DMA_CHUNK_SIZE */ | |
30 | #include <asm/io.h> | |
31 | #include <asm/page.h> /* get_order */ | |
32 | #include <asm/pgalloc.h> | |
33 | #include <asm/uaccess.h> | |
34 | ||
35 | ||
36 | static struct proc_dir_entry * proc_gsc_root = NULL; | |
37 | static int pcxl_proc_info(char *buffer, char **start, off_t offset, int length); | |
38 | static unsigned long pcxl_used_bytes = 0; | |
39 | static unsigned long pcxl_used_pages = 0; | |
40 | ||
41 | extern unsigned long pcxl_dma_start; /* Start of pcxl dma mapping area */ | |
42 | static spinlock_t pcxl_res_lock; | |
43 | static char *pcxl_res_map; | |
44 | static int pcxl_res_hint; | |
45 | static int pcxl_res_size; | |
46 | ||
47 | #ifdef DEBUG_PCXL_RESOURCE | |
48 | #define DBG_RES(x...) printk(x) | |
49 | #else | |
50 | #define DBG_RES(x...) | |
51 | #endif | |
52 | ||
53 | ||
54 | /* | |
55 | ** Dump a hex representation of the resource map. | |
56 | */ | |
57 | ||
58 | #ifdef DUMP_RESMAP | |
59 | static | |
60 | void dump_resmap(void) | |
61 | { | |
62 | u_long *res_ptr = (unsigned long *)pcxl_res_map; | |
63 | u_long i = 0; | |
64 | ||
65 | printk("res_map: "); | |
66 | for(; i < (pcxl_res_size / sizeof(unsigned long)); ++i, ++res_ptr) | |
67 | printk("%08lx ", *res_ptr); | |
68 | ||
69 | printk("\n"); | |
70 | } | |
71 | #else | |
72 | static inline void dump_resmap(void) {;} | |
73 | #endif | |
74 | ||
75 | static int pa11_dma_supported( struct device *dev, u64 mask) | |
76 | { | |
77 | return 1; | |
78 | } | |
79 | ||
80 | static inline int map_pte_uncached(pte_t * pte, | |
81 | unsigned long vaddr, | |
82 | unsigned long size, unsigned long *paddr_ptr) | |
83 | { | |
84 | unsigned long end; | |
85 | unsigned long orig_vaddr = vaddr; | |
86 | ||
87 | vaddr &= ~PMD_MASK; | |
88 | end = vaddr + size; | |
89 | if (end > PMD_SIZE) | |
90 | end = PMD_SIZE; | |
91 | do { | |
92 | if (!pte_none(*pte)) | |
93 | printk(KERN_ERR "map_pte_uncached: page already exists\n"); | |
94 | set_pte(pte, __mk_pte(*paddr_ptr, PAGE_KERNEL_UNC)); | |
95 | purge_tlb_start(); | |
96 | pdtlb_kernel(orig_vaddr); | |
97 | purge_tlb_end(); | |
98 | vaddr += PAGE_SIZE; | |
99 | orig_vaddr += PAGE_SIZE; | |
100 | (*paddr_ptr) += PAGE_SIZE; | |
101 | pte++; | |
102 | } while (vaddr < end); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static inline int map_pmd_uncached(pmd_t * pmd, unsigned long vaddr, | |
107 | unsigned long size, unsigned long *paddr_ptr) | |
108 | { | |
109 | unsigned long end; | |
110 | unsigned long orig_vaddr = vaddr; | |
111 | ||
112 | vaddr &= ~PGDIR_MASK; | |
113 | end = vaddr + size; | |
114 | if (end > PGDIR_SIZE) | |
115 | end = PGDIR_SIZE; | |
116 | do { | |
117 | pte_t * pte = pte_alloc_kernel(&init_mm, pmd, vaddr); | |
118 | if (!pte) | |
119 | return -ENOMEM; | |
120 | if (map_pte_uncached(pte, orig_vaddr, end - vaddr, paddr_ptr)) | |
121 | return -ENOMEM; | |
122 | vaddr = (vaddr + PMD_SIZE) & PMD_MASK; | |
123 | orig_vaddr += PMD_SIZE; | |
124 | pmd++; | |
125 | } while (vaddr < end); | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static inline int map_uncached_pages(unsigned long vaddr, unsigned long size, | |
130 | unsigned long paddr) | |
131 | { | |
132 | pgd_t * dir; | |
133 | unsigned long end = vaddr + size; | |
134 | ||
135 | dir = pgd_offset_k(vaddr); | |
136 | do { | |
137 | pmd_t *pmd; | |
138 | ||
139 | pmd = pmd_alloc(NULL, dir, vaddr); | |
140 | if (!pmd) | |
141 | return -ENOMEM; | |
142 | if (map_pmd_uncached(pmd, vaddr, end - vaddr, &paddr)) | |
143 | return -ENOMEM; | |
144 | vaddr = vaddr + PGDIR_SIZE; | |
145 | dir++; | |
146 | } while (vaddr && (vaddr < end)); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static inline void unmap_uncached_pte(pmd_t * pmd, unsigned long vaddr, | |
151 | unsigned long size) | |
152 | { | |
153 | pte_t * pte; | |
154 | unsigned long end; | |
155 | unsigned long orig_vaddr = vaddr; | |
156 | ||
157 | if (pmd_none(*pmd)) | |
158 | return; | |
159 | if (pmd_bad(*pmd)) { | |
160 | pmd_ERROR(*pmd); | |
161 | pmd_clear(pmd); | |
162 | return; | |
163 | } | |
164 | pte = pte_offset_map(pmd, vaddr); | |
165 | vaddr &= ~PMD_MASK; | |
166 | end = vaddr + size; | |
167 | if (end > PMD_SIZE) | |
168 | end = PMD_SIZE; | |
169 | do { | |
170 | pte_t page = *pte; | |
171 | pte_clear(&init_mm, vaddr, pte); | |
172 | purge_tlb_start(); | |
173 | pdtlb_kernel(orig_vaddr); | |
174 | purge_tlb_end(); | |
175 | vaddr += PAGE_SIZE; | |
176 | orig_vaddr += PAGE_SIZE; | |
177 | pte++; | |
178 | if (pte_none(page) || pte_present(page)) | |
179 | continue; | |
180 | printk(KERN_CRIT "Whee.. Swapped out page in kernel page table\n"); | |
181 | } while (vaddr < end); | |
182 | } | |
183 | ||
184 | static inline void unmap_uncached_pmd(pgd_t * dir, unsigned long vaddr, | |
185 | unsigned long size) | |
186 | { | |
187 | pmd_t * pmd; | |
188 | unsigned long end; | |
189 | unsigned long orig_vaddr = vaddr; | |
190 | ||
191 | if (pgd_none(*dir)) | |
192 | return; | |
193 | if (pgd_bad(*dir)) { | |
194 | pgd_ERROR(*dir); | |
195 | pgd_clear(dir); | |
196 | return; | |
197 | } | |
198 | pmd = pmd_offset(dir, vaddr); | |
199 | vaddr &= ~PGDIR_MASK; | |
200 | end = vaddr + size; | |
201 | if (end > PGDIR_SIZE) | |
202 | end = PGDIR_SIZE; | |
203 | do { | |
204 | unmap_uncached_pte(pmd, orig_vaddr, end - vaddr); | |
205 | vaddr = (vaddr + PMD_SIZE) & PMD_MASK; | |
206 | orig_vaddr += PMD_SIZE; | |
207 | pmd++; | |
208 | } while (vaddr < end); | |
209 | } | |
210 | ||
211 | static void unmap_uncached_pages(unsigned long vaddr, unsigned long size) | |
212 | { | |
213 | pgd_t * dir; | |
214 | unsigned long end = vaddr + size; | |
215 | ||
216 | dir = pgd_offset_k(vaddr); | |
217 | do { | |
218 | unmap_uncached_pmd(dir, vaddr, end - vaddr); | |
219 | vaddr = vaddr + PGDIR_SIZE; | |
220 | dir++; | |
221 | } while (vaddr && (vaddr < end)); | |
222 | } | |
223 | ||
224 | #define PCXL_SEARCH_LOOP(idx, mask, size) \ | |
225 | for(; res_ptr < res_end; ++res_ptr) \ | |
226 | { \ | |
227 | if(0 == ((*res_ptr) & mask)) { \ | |
228 | *res_ptr |= mask; \ | |
229 | idx = (int)((u_long)res_ptr - (u_long)pcxl_res_map); \ | |
230 | pcxl_res_hint = idx + (size >> 3); \ | |
231 | goto resource_found; \ | |
232 | } \ | |
233 | } | |
234 | ||
235 | #define PCXL_FIND_FREE_MAPPING(idx, mask, size) { \ | |
236 | u##size *res_ptr = (u##size *)&(pcxl_res_map[pcxl_res_hint & ~((size >> 3) - 1)]); \ | |
237 | u##size *res_end = (u##size *)&pcxl_res_map[pcxl_res_size]; \ | |
238 | PCXL_SEARCH_LOOP(idx, mask, size); \ | |
239 | res_ptr = (u##size *)&pcxl_res_map[0]; \ | |
240 | PCXL_SEARCH_LOOP(idx, mask, size); \ | |
241 | } | |
242 | ||
243 | unsigned long | |
244 | pcxl_alloc_range(size_t size) | |
245 | { | |
246 | int res_idx; | |
247 | u_long mask, flags; | |
248 | unsigned int pages_needed = size >> PAGE_SHIFT; | |
249 | ||
250 | mask = (u_long) -1L; | |
251 | mask >>= BITS_PER_LONG - pages_needed; | |
252 | ||
253 | DBG_RES("pcxl_alloc_range() size: %d pages_needed %d pages_mask 0x%08lx\n", | |
254 | size, pages_needed, mask); | |
255 | ||
256 | spin_lock_irqsave(&pcxl_res_lock, flags); | |
257 | ||
258 | if(pages_needed <= 8) { | |
259 | PCXL_FIND_FREE_MAPPING(res_idx, mask, 8); | |
260 | } else if(pages_needed <= 16) { | |
261 | PCXL_FIND_FREE_MAPPING(res_idx, mask, 16); | |
262 | } else if(pages_needed <= 32) { | |
263 | PCXL_FIND_FREE_MAPPING(res_idx, mask, 32); | |
264 | } else { | |
265 | panic("%s: pcxl_alloc_range() Too many pages to map.\n", | |
266 | __FILE__); | |
267 | } | |
268 | ||
269 | dump_resmap(); | |
270 | panic("%s: pcxl_alloc_range() out of dma mapping resources\n", | |
271 | __FILE__); | |
272 | ||
273 | resource_found: | |
274 | ||
275 | DBG_RES("pcxl_alloc_range() res_idx %d mask 0x%08lx res_hint: %d\n", | |
276 | res_idx, mask, pcxl_res_hint); | |
277 | ||
278 | pcxl_used_pages += pages_needed; | |
279 | pcxl_used_bytes += ((pages_needed >> 3) ? (pages_needed >> 3) : 1); | |
280 | ||
281 | spin_unlock_irqrestore(&pcxl_res_lock, flags); | |
282 | ||
283 | dump_resmap(); | |
284 | ||
285 | /* | |
286 | ** return the corresponding vaddr in the pcxl dma map | |
287 | */ | |
288 | return (pcxl_dma_start + (res_idx << (PAGE_SHIFT + 3))); | |
289 | } | |
290 | ||
291 | #define PCXL_FREE_MAPPINGS(idx, m, size) \ | |
292 | u##size *res_ptr = (u##size *)&(pcxl_res_map[(idx) + (((size >> 3) - 1) & (~((size >> 3) - 1)))]); \ | |
293 | /* BUG_ON((*res_ptr & m) != m); */ \ | |
294 | *res_ptr &= ~m; | |
295 | ||
296 | /* | |
297 | ** clear bits in the pcxl resource map | |
298 | */ | |
299 | static void | |
300 | pcxl_free_range(unsigned long vaddr, size_t size) | |
301 | { | |
302 | u_long mask, flags; | |
303 | unsigned int res_idx = (vaddr - pcxl_dma_start) >> (PAGE_SHIFT + 3); | |
304 | unsigned int pages_mapped = size >> PAGE_SHIFT; | |
305 | ||
306 | mask = (u_long) -1L; | |
307 | mask >>= BITS_PER_LONG - pages_mapped; | |
308 | ||
309 | DBG_RES("pcxl_free_range() res_idx: %d size: %d pages_mapped %d mask 0x%08lx\n", | |
310 | res_idx, size, pages_mapped, mask); | |
311 | ||
312 | spin_lock_irqsave(&pcxl_res_lock, flags); | |
313 | ||
314 | if(pages_mapped <= 8) { | |
315 | PCXL_FREE_MAPPINGS(res_idx, mask, 8); | |
316 | } else if(pages_mapped <= 16) { | |
317 | PCXL_FREE_MAPPINGS(res_idx, mask, 16); | |
318 | } else if(pages_mapped <= 32) { | |
319 | PCXL_FREE_MAPPINGS(res_idx, mask, 32); | |
320 | } else { | |
321 | panic("%s: pcxl_free_range() Too many pages to unmap.\n", | |
322 | __FILE__); | |
323 | } | |
324 | ||
325 | pcxl_used_pages -= (pages_mapped ? pages_mapped : 1); | |
326 | pcxl_used_bytes -= ((pages_mapped >> 3) ? (pages_mapped >> 3) : 1); | |
327 | ||
328 | spin_unlock_irqrestore(&pcxl_res_lock, flags); | |
329 | ||
330 | dump_resmap(); | |
331 | } | |
332 | ||
333 | static int __init | |
334 | pcxl_dma_init(void) | |
335 | { | |
336 | if (pcxl_dma_start == 0) | |
337 | return 0; | |
338 | ||
339 | spin_lock_init(&pcxl_res_lock); | |
340 | pcxl_res_size = PCXL_DMA_MAP_SIZE >> (PAGE_SHIFT + 3); | |
341 | pcxl_res_hint = 0; | |
342 | pcxl_res_map = (char *)__get_free_pages(GFP_KERNEL, | |
343 | get_order(pcxl_res_size)); | |
344 | memset(pcxl_res_map, 0, pcxl_res_size); | |
345 | proc_gsc_root = proc_mkdir("gsc", 0); | |
346 | create_proc_info_entry("dino", 0, proc_gsc_root, pcxl_proc_info); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | __initcall(pcxl_dma_init); | |
351 | ||
352 | static void * pa11_dma_alloc_consistent (struct device *dev, size_t size, dma_addr_t *dma_handle, int flag) | |
353 | { | |
354 | unsigned long vaddr; | |
355 | unsigned long paddr; | |
356 | int order; | |
357 | ||
358 | order = get_order(size); | |
359 | size = 1 << (order + PAGE_SHIFT); | |
360 | vaddr = pcxl_alloc_range(size); | |
361 | paddr = __get_free_pages(flag, order); | |
362 | flush_kernel_dcache_range(paddr, size); | |
363 | paddr = __pa(paddr); | |
364 | map_uncached_pages(vaddr, size, paddr); | |
365 | *dma_handle = (dma_addr_t) paddr; | |
366 | ||
367 | #if 0 | |
368 | /* This probably isn't needed to support EISA cards. | |
369 | ** ISA cards will certainly only support 24-bit DMA addressing. | |
370 | ** Not clear if we can, want, or need to support ISA. | |
371 | */ | |
372 | if (!dev || *dev->coherent_dma_mask < 0xffffffff) | |
373 | gfp |= GFP_DMA; | |
374 | #endif | |
375 | return (void *)vaddr; | |
376 | } | |
377 | ||
378 | static void pa11_dma_free_consistent (struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle) | |
379 | { | |
380 | int order; | |
381 | ||
382 | order = get_order(size); | |
383 | size = 1 << (order + PAGE_SHIFT); | |
384 | unmap_uncached_pages((unsigned long)vaddr, size); | |
385 | pcxl_free_range((unsigned long)vaddr, size); | |
386 | free_pages((unsigned long)__va(dma_handle), order); | |
387 | } | |
388 | ||
389 | static dma_addr_t pa11_dma_map_single(struct device *dev, void *addr, size_t size, enum dma_data_direction direction) | |
390 | { | |
391 | if (direction == DMA_NONE) { | |
392 | printk(KERN_ERR "pa11_dma_map_single(PCI_DMA_NONE) called by %p\n", __builtin_return_address(0)); | |
393 | BUG(); | |
394 | } | |
395 | ||
396 | flush_kernel_dcache_range((unsigned long) addr, size); | |
397 | return virt_to_phys(addr); | |
398 | } | |
399 | ||
400 | static void pa11_dma_unmap_single(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction) | |
401 | { | |
402 | if (direction == DMA_NONE) { | |
403 | printk(KERN_ERR "pa11_dma_unmap_single(PCI_DMA_NONE) called by %p\n", __builtin_return_address(0)); | |
404 | BUG(); | |
405 | } | |
406 | ||
407 | if (direction == DMA_TO_DEVICE) | |
408 | return; | |
409 | ||
410 | /* | |
411 | * For PCI_DMA_FROMDEVICE this flush is not necessary for the | |
412 | * simple map/unmap case. However, it IS necessary if if | |
413 | * pci_dma_sync_single_* has been called and the buffer reused. | |
414 | */ | |
415 | ||
416 | flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), size); | |
417 | return; | |
418 | } | |
419 | ||
420 | static int pa11_dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) | |
421 | { | |
422 | int i; | |
423 | ||
424 | if (direction == DMA_NONE) | |
425 | BUG(); | |
426 | ||
427 | for (i = 0; i < nents; i++, sglist++ ) { | |
428 | unsigned long vaddr = sg_virt_addr(sglist); | |
429 | sg_dma_address(sglist) = (dma_addr_t) virt_to_phys(vaddr); | |
430 | sg_dma_len(sglist) = sglist->length; | |
431 | flush_kernel_dcache_range(vaddr, sglist->length); | |
432 | } | |
433 | return nents; | |
434 | } | |
435 | ||
436 | static void pa11_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) | |
437 | { | |
438 | int i; | |
439 | ||
440 | if (direction == DMA_NONE) | |
441 | BUG(); | |
442 | ||
443 | if (direction == DMA_TO_DEVICE) | |
444 | return; | |
445 | ||
446 | /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ | |
447 | ||
448 | for (i = 0; i < nents; i++, sglist++ ) | |
449 | flush_kernel_dcache_range(sg_virt_addr(sglist), sglist->length); | |
450 | return; | |
451 | } | |
452 | ||
453 | static void pa11_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, unsigned long offset, size_t size, enum dma_data_direction direction) | |
454 | { | |
455 | if (direction == DMA_NONE) | |
456 | BUG(); | |
457 | ||
458 | flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle) + offset, size); | |
459 | } | |
460 | ||
461 | static void pa11_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, unsigned long offset, size_t size, enum dma_data_direction direction) | |
462 | { | |
463 | if (direction == DMA_NONE) | |
464 | BUG(); | |
465 | ||
466 | flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle) + offset, size); | |
467 | } | |
468 | ||
469 | static void pa11_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) | |
470 | { | |
471 | int i; | |
472 | ||
473 | /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ | |
474 | ||
475 | for (i = 0; i < nents; i++, sglist++ ) | |
476 | flush_kernel_dcache_range(sg_virt_addr(sglist), sglist->length); | |
477 | } | |
478 | ||
479 | static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) | |
480 | { | |
481 | int i; | |
482 | ||
483 | /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ | |
484 | ||
485 | for (i = 0; i < nents; i++, sglist++ ) | |
486 | flush_kernel_dcache_range(sg_virt_addr(sglist), sglist->length); | |
487 | } | |
488 | ||
489 | struct hppa_dma_ops pcxl_dma_ops = { | |
490 | .dma_supported = pa11_dma_supported, | |
491 | .alloc_consistent = pa11_dma_alloc_consistent, | |
492 | .alloc_noncoherent = pa11_dma_alloc_consistent, | |
493 | .free_consistent = pa11_dma_free_consistent, | |
494 | .map_single = pa11_dma_map_single, | |
495 | .unmap_single = pa11_dma_unmap_single, | |
496 | .map_sg = pa11_dma_map_sg, | |
497 | .unmap_sg = pa11_dma_unmap_sg, | |
498 | .dma_sync_single_for_cpu = pa11_dma_sync_single_for_cpu, | |
499 | .dma_sync_single_for_device = pa11_dma_sync_single_for_device, | |
500 | .dma_sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, | |
501 | .dma_sync_sg_for_device = pa11_dma_sync_sg_for_device, | |
502 | }; | |
503 | ||
504 | static void *fail_alloc_consistent(struct device *dev, size_t size, | |
505 | dma_addr_t *dma_handle, int flag) | |
506 | { | |
507 | return NULL; | |
508 | } | |
509 | ||
510 | static void *pa11_dma_alloc_noncoherent(struct device *dev, size_t size, | |
511 | dma_addr_t *dma_handle, int flag) | |
512 | { | |
513 | void *addr = NULL; | |
514 | ||
515 | /* rely on kmalloc to be cacheline aligned */ | |
516 | addr = kmalloc(size, flag); | |
517 | if(addr) | |
518 | *dma_handle = (dma_addr_t)virt_to_phys(addr); | |
519 | ||
520 | return addr; | |
521 | } | |
522 | ||
523 | static void pa11_dma_free_noncoherent(struct device *dev, size_t size, | |
524 | void *vaddr, dma_addr_t iova) | |
525 | { | |
526 | kfree(vaddr); | |
527 | return; | |
528 | } | |
529 | ||
530 | struct hppa_dma_ops pcx_dma_ops = { | |
531 | .dma_supported = pa11_dma_supported, | |
532 | .alloc_consistent = fail_alloc_consistent, | |
533 | .alloc_noncoherent = pa11_dma_alloc_noncoherent, | |
534 | .free_consistent = pa11_dma_free_noncoherent, | |
535 | .map_single = pa11_dma_map_single, | |
536 | .unmap_single = pa11_dma_unmap_single, | |
537 | .map_sg = pa11_dma_map_sg, | |
538 | .unmap_sg = pa11_dma_unmap_sg, | |
539 | .dma_sync_single_for_cpu = pa11_dma_sync_single_for_cpu, | |
540 | .dma_sync_single_for_device = pa11_dma_sync_single_for_device, | |
541 | .dma_sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, | |
542 | .dma_sync_sg_for_device = pa11_dma_sync_sg_for_device, | |
543 | }; | |
544 | ||
545 | ||
546 | static int pcxl_proc_info(char *buf, char **start, off_t offset, int len) | |
547 | { | |
548 | u_long i = 0; | |
549 | unsigned long *res_ptr = (u_long *)pcxl_res_map; | |
550 | unsigned long total_pages = pcxl_res_size << 3; /* 8 bits per byte */ | |
551 | ||
552 | sprintf(buf, "\nDMA Mapping Area size : %d bytes (%d pages)\n", | |
553 | PCXL_DMA_MAP_SIZE, | |
554 | (pcxl_res_size << 3) ); /* 1 bit per page */ | |
555 | ||
556 | sprintf(buf, "%sResource bitmap : %d bytes (%d pages)\n", | |
557 | buf, pcxl_res_size, pcxl_res_size << 3); /* 8 bits per byte */ | |
558 | ||
559 | strcat(buf, " total: free: used: % used:\n"); | |
560 | sprintf(buf, "%sblocks %8d %8ld %8ld %8ld%%\n", buf, pcxl_res_size, | |
561 | pcxl_res_size - pcxl_used_bytes, pcxl_used_bytes, | |
562 | (pcxl_used_bytes * 100) / pcxl_res_size); | |
563 | ||
564 | sprintf(buf, "%spages %8ld %8ld %8ld %8ld%%\n", buf, total_pages, | |
565 | total_pages - pcxl_used_pages, pcxl_used_pages, | |
566 | (pcxl_used_pages * 100 / total_pages)); | |
567 | ||
568 | strcat(buf, "\nResource bitmap:"); | |
569 | ||
570 | for(; i < (pcxl_res_size / sizeof(u_long)); ++i, ++res_ptr) { | |
571 | if ((i & 7) == 0) | |
572 | strcat(buf,"\n "); | |
573 | sprintf(buf, "%s %08lx", buf, *res_ptr); | |
574 | } | |
575 | strcat(buf, "\n"); | |
576 | return strlen(buf); | |
577 | } | |
578 |