?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / target / target_core_rd.c
blobddc216c9f1f63dcdea780b5be5edbf34d9cc93d4
1 /*******************************************************************************
2 * Filename: target_core_rd.c
3 *
4 * This file contains the Storage Engine <-> Ramdisk transport
5 * specific functions.
6 *
7 * (c) Copyright 2003-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 *
25 ******************************************************************************/
26
27 #include <linux/string.h>
28 #include <linux/parser.h>
29 #include <linux/highmem.h>
30 #include <linux/timer.h>
31 #include <linux/scatterlist.h>
32 #include <linux/slab.h>
33 #include <linux/spinlock.h>
34 #include <scsi/scsi_proto.h>
35
36 #include <target/target_core_base.h>
37 #include <target/target_core_backend.h>
38
39 #include "target_core_rd.h"
40
41 static inline struct rd_dev *RD_DEV(struct se_device *dev)
42 {
43 return container_of(dev, struct rd_dev, dev);
44 }
45
46 static int rd_attach_hba(struct se_hba *hba, u32 host_id)
47 {
48 struct rd_host *rd_host;
49
50 rd_host = kzalloc(sizeof(struct rd_host), GFP_KERNEL);
51 if (!rd_host) {
52 pr_err("Unable to allocate memory for struct rd_host\n");
53 return -ENOMEM;
54 }
55
56 rd_host->rd_host_id = host_id;
57
58 hba->hba_ptr = rd_host;
59
60 pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on"
61 " Generic Target Core Stack %s\n", hba->hba_id,
62 RD_HBA_VERSION, TARGET_CORE_VERSION);
63
64 return 0;
65 }
66
67 static void rd_detach_hba(struct se_hba *hba)
68 {
69 struct rd_host *rd_host = hba->hba_ptr;
70
71 pr_debug("CORE_HBA[%d] - Detached Ramdisk HBA: %u from"
72 " Generic Target Core\n", hba->hba_id, rd_host->rd_host_id);
73
74 kfree(rd_host);
75 hba->hba_ptr = NULL;
76 }
77
78 static u32 rd_release_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table *sg_table,
79 u32 sg_table_count)
80 {
81 struct page *pg;
82 struct scatterlist *sg;
83 u32 i, j, page_count = 0, sg_per_table;
84
85 for (i = 0; i < sg_table_count; i++) {
86 sg = sg_table[i].sg_table;
87 sg_per_table = sg_table[i].rd_sg_count;
88
89 for (j = 0; j < sg_per_table; j++) {
90 pg = sg_page(&sg[j]);
91 if (pg) {
92 __free_page(pg);
93 page_count++;
94 }
95 }
96 kfree(sg);
97 }
98
99 kfree(sg_table);
100 return page_count;
101 }
102
103 static void rd_release_device_space(struct rd_dev *rd_dev)
104 {
105 u32 page_count;
106
107 if (!rd_dev->sg_table_array || !rd_dev->sg_table_count)
108 return;
109
110 page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_table_array,
111 rd_dev->sg_table_count);
112
113 pr_debug("CORE_RD[%u] - Released device space for Ramdisk"
114 " Device ID: %u, pages %u in %u tables total bytes %lu\n",
115 rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count,
116 rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE);
117
118 rd_dev->sg_table_array = NULL;
119 rd_dev->sg_table_count = 0;
120 }
121
122
123 /* rd_build_device_space():
124 *
125 *
126 */
127 static int rd_allocate_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table *sg_table,
128 u32 total_sg_needed, unsigned char init_payload)
129 {
130 u32 i = 0, j, page_offset = 0, sg_per_table;
131 u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE /
132 sizeof(struct scatterlist));
133 struct page *pg;
134 struct scatterlist *sg;
135 unsigned char *p;
136
137 while (total_sg_needed) {
138 unsigned int chain_entry = 0;
139
140 sg_per_table = (total_sg_needed > max_sg_per_table) ?
141 max_sg_per_table : total_sg_needed;
142
143 /*
144 * Reserve extra element for chain entry
145 */
146 if (sg_per_table < total_sg_needed)
147 chain_entry = 1;
148
149 sg = kcalloc(sg_per_table + chain_entry, sizeof(*sg),
150 GFP_KERNEL);
151 if (!sg) {
152 pr_err("Unable to allocate scatterlist array"
153 " for struct rd_dev\n");
154 return -ENOMEM;
155 }
156
157 sg_init_table(sg, sg_per_table + chain_entry);
158
159 if (i > 0) {
160 sg_chain(sg_table[i - 1].sg_table,
161 max_sg_per_table + 1, sg);
162 }
163
164 sg_table[i].sg_table = sg;
165 sg_table[i].rd_sg_count = sg_per_table;
166 sg_table[i].page_start_offset = page_offset;
167 sg_table[i++].page_end_offset = (page_offset + sg_per_table)
168 - 1;
169
170 for (j = 0; j < sg_per_table; j++) {
171 pg = alloc_pages(GFP_KERNEL, 0);
172 if (!pg) {
173 pr_err("Unable to allocate scatterlist"
174 " pages for struct rd_dev_sg_table\n");
175 return -ENOMEM;
176 }
177 sg_assign_page(&sg[j], pg);
178 sg[j].length = PAGE_SIZE;
179
180 p = kmap(pg);
181 memset(p, init_payload, PAGE_SIZE);
182 kunmap(pg);
183 }
184
185 page_offset += sg_per_table;
186 total_sg_needed -= sg_per_table;
187 }
188
189 return 0;
190 }
191
192 static int rd_build_device_space(struct rd_dev *rd_dev)
193 {
194 struct rd_dev_sg_table *sg_table;
195 u32 sg_tables, total_sg_needed;
196 u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE /
197 sizeof(struct scatterlist));
198 int rc;
199
200 if (rd_dev->rd_page_count <= 0) {
201 pr_err("Illegal page count: %u for Ramdisk device\n",
202 rd_dev->rd_page_count);
203 return -EINVAL;
204 }
205
206 /* Don't need backing pages for NULLIO */
207 if (rd_dev->rd_flags & RDF_NULLIO)
208 return 0;
209
210 total_sg_needed = rd_dev->rd_page_count;
211
212 sg_tables = (total_sg_needed / max_sg_per_table) + 1;
213
214 sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL);
215 if (!sg_table) {
216 pr_err("Unable to allocate memory for Ramdisk"
217 " scatterlist tables\n");
218 return -ENOMEM;
219 }
220
221 rd_dev->sg_table_array = sg_table;
222 rd_dev->sg_table_count = sg_tables;
223
224 rc = rd_allocate_sgl_table(rd_dev, sg_table, total_sg_needed, 0x00);
225 if (rc)
226 return rc;
227
228 pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of"
229 " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id,
230 rd_dev->rd_dev_id, rd_dev->rd_page_count,
231 rd_dev->sg_table_count);
232
233 return 0;
234 }
235
236 static void rd_release_prot_space(struct rd_dev *rd_dev)
237 {
238 u32 page_count;
239
240 if (!rd_dev->sg_prot_array || !rd_dev->sg_prot_count)
241 return;
242
243 page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_prot_array,
244 rd_dev->sg_prot_count);
245
246 pr_debug("CORE_RD[%u] - Released protection space for Ramdisk"
247 " Device ID: %u, pages %u in %u tables total bytes %lu\n",
248 rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count,
249 rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE);
250
251 rd_dev->sg_prot_array = NULL;
252 rd_dev->sg_prot_count = 0;
253 }
254
255 static int rd_build_prot_space(struct rd_dev *rd_dev, int prot_length, int block_size)
256 {
257 struct rd_dev_sg_table *sg_table;
258 u32 total_sg_needed, sg_tables;
259 u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE /
260 sizeof(struct scatterlist));
261 int rc;
262
263 if (rd_dev->rd_flags & RDF_NULLIO)
264 return 0;
265 /*
266 * prot_length=8byte dif data
267 * tot sg needed = rd_page_count * (PGSZ/block_size) *
268 * (prot_length/block_size) + pad
269 * PGSZ canceled each other.
270 */
271 total_sg_needed = (rd_dev->rd_page_count * prot_length / block_size) + 1;
272
273 sg_tables = (total_sg_needed / max_sg_per_table) + 1;
274
275 sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL);
276 if (!sg_table) {
277 pr_err("Unable to allocate memory for Ramdisk protection"
278 " scatterlist tables\n");
279 return -ENOMEM;
280 }
281
282 rd_dev->sg_prot_array = sg_table;
283 rd_dev->sg_prot_count = sg_tables;
284
285 rc = rd_allocate_sgl_table(rd_dev, sg_table, total_sg_needed, 0xff);
286 if (rc)
287 return rc;
288
289 pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u prot space of"
290 " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id,
291 rd_dev->rd_dev_id, total_sg_needed, rd_dev->sg_prot_count);
292
293 return 0;
294 }
295
296 static struct se_device *rd_alloc_device(struct se_hba *hba, const char *name)
297 {
298 struct rd_dev *rd_dev;
299 struct rd_host *rd_host = hba->hba_ptr;
300
301 rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL);
302 if (!rd_dev) {
303 pr_err("Unable to allocate memory for struct rd_dev\n");
304 return NULL;
305 }
306
307 rd_dev->rd_host = rd_host;
308
309 return &rd_dev->dev;
310 }
311
312 static int rd_configure_device(struct se_device *dev)
313 {
314 struct rd_dev *rd_dev = RD_DEV(dev);
315 struct rd_host *rd_host = dev->se_hba->hba_ptr;
316 int ret;
317
318 if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) {
319 pr_debug("Missing rd_pages= parameter\n");
320 return -EINVAL;
321 }
322
323 ret = rd_build_device_space(rd_dev);
324 if (ret < 0)
325 goto fail;
326
327 dev->dev_attrib.hw_block_size = RD_BLOCKSIZE;
328 dev->dev_attrib.hw_max_sectors = UINT_MAX;
329 dev->dev_attrib.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
330 dev->dev_attrib.is_nonrot = 1;
331
332 rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
333
334 pr_debug("CORE_RD[%u] - Added TCM MEMCPY Ramdisk Device ID: %u of"
335 " %u pages in %u tables, %lu total bytes\n",
336 rd_host->rd_host_id, rd_dev->rd_dev_id, rd_dev->rd_page_count,
337 rd_dev->sg_table_count,
338 (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE));
339
340 return 0;
341
342 fail:
343 rd_release_device_space(rd_dev);
344 return ret;
345 }
346
347 static void rd_dev_call_rcu(struct rcu_head *p)
348 {
349 struct se_device *dev = container_of(p, struct se_device, rcu_head);
350 struct rd_dev *rd_dev = RD_DEV(dev);
351
352 kfree(rd_dev);
353 }
354
355 static void rd_free_device(struct se_device *dev)
356 {
357 struct rd_dev *rd_dev = RD_DEV(dev);
358
359 rd_release_device_space(rd_dev);
360 call_rcu(&dev->rcu_head, rd_dev_call_rcu);
361 }
362
363 static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
364 {
365 struct rd_dev_sg_table *sg_table;
366 u32 i, sg_per_table = (RD_MAX_ALLOCATION_SIZE /
367 sizeof(struct scatterlist));
368
369 i = page / sg_per_table;
370 if (i < rd_dev->sg_table_count) {
371 sg_table = &rd_dev->sg_table_array[i];
372 if ((sg_table->page_start_offset <= page) &&
373 (sg_table->page_end_offset >= page))
374 return sg_table;
375 }
376
377 pr_err("Unable to locate struct rd_dev_sg_table for page: %u\n",
378 page);
379
380 return NULL;
381 }
382
383 static struct rd_dev_sg_table *rd_get_prot_table(struct rd_dev *rd_dev, u32 page)
384 {
385 struct rd_dev_sg_table *sg_table;
386 u32 i, sg_per_table = (RD_MAX_ALLOCATION_SIZE /
387 sizeof(struct scatterlist));
388
389 i = page / sg_per_table;
390 if (i < rd_dev->sg_prot_count) {
391 sg_table = &rd_dev->sg_prot_array[i];
392 if ((sg_table->page_start_offset <= page) &&
393 (sg_table->page_end_offset >= page))
394 return sg_table;
395 }
396
397 pr_err("Unable to locate struct prot rd_dev_sg_table for page: %u\n",
398 page);
399
400 return NULL;
401 }
402
403 static sense_reason_t rd_do_prot_rw(struct se_cmd *cmd, bool is_read)
404 {
405 struct se_device *se_dev = cmd->se_dev;
406 struct rd_dev *dev = RD_DEV(se_dev);
407 struct rd_dev_sg_table *prot_table;
408 struct scatterlist *prot_sg;
409 u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size;
410 u32 prot_offset, prot_page;
411 u32 prot_npages __maybe_unused;
412 u64 tmp;
413 sense_reason_t rc = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
414
415 tmp = cmd->t_task_lba * se_dev->prot_length;
416 prot_offset = do_div(tmp, PAGE_SIZE);
417 prot_page = tmp;
418
419 prot_table = rd_get_prot_table(dev, prot_page);
420 if (!prot_table)
421 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
422
423 prot_sg = &prot_table->sg_table[prot_page -
424 prot_table->page_start_offset];
425
426 if (is_read)
427 rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, 0,
428 prot_sg, prot_offset);
429 else
430 rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, 0,
431 cmd->t_prot_sg, 0);
432
433 if (!rc)
434 sbc_dif_copy_prot(cmd, sectors, is_read, prot_sg, prot_offset);
435
436 return rc;
437 }
438
439 static sense_reason_t
440 rd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
441 enum dma_data_direction data_direction)
442 {
443 struct se_device *se_dev = cmd->se_dev;
444 struct rd_dev *dev = RD_DEV(se_dev);
445 struct rd_dev_sg_table *table;
446 struct scatterlist *rd_sg;
447 struct sg_mapping_iter m;
448 u32 rd_offset;
449 u32 rd_size;
450 u32 rd_page;
451 u32 src_len;
452 u64 tmp;
453 sense_reason_t rc;
454
455 if (dev->rd_flags & RDF_NULLIO) {
456 target_complete_cmd(cmd, SAM_STAT_GOOD);
457 return 0;
458 }
459
460 tmp = cmd->t_task_lba * se_dev->dev_attrib.block_size;
461 rd_offset = do_div(tmp, PAGE_SIZE);
462 rd_page = tmp;
463 rd_size = cmd->data_length;
464
465 table = rd_get_sg_table(dev, rd_page);
466 if (!table)
467 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
468
469 rd_sg = &table->sg_table[rd_page - table->page_start_offset];
470
471 pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n",
472 dev->rd_dev_id,
473 data_direction == DMA_FROM_DEVICE ? "Read" : "Write",
474 cmd->t_task_lba, rd_size, rd_page, rd_offset);
475
476 if (cmd->prot_type && se_dev->dev_attrib.pi_prot_type &&
477 data_direction == DMA_TO_DEVICE) {
478 rc = rd_do_prot_rw(cmd, false);
479 if (rc)
480 return rc;
481 }
482
483 src_len = PAGE_SIZE - rd_offset;
484 sg_miter_start(&m, sgl, sgl_nents,
485 data_direction == DMA_FROM_DEVICE ?
486 SG_MITER_TO_SG : SG_MITER_FROM_SG);
487 while (rd_size) {
488 u32 len;
489 void *rd_addr;
490
491 sg_miter_next(&m);
492 if (!(u32)m.length) {
493 pr_debug("RD[%u]: invalid sgl %p len %zu\n",
494 dev->rd_dev_id, m.addr, m.length);
495 sg_miter_stop(&m);
496 return TCM_INCORRECT_AMOUNT_OF_DATA;
497 }
498 len = min((u32)m.length, src_len);
499 if (len > rd_size) {
500 pr_debug("RD[%u]: size underrun page %d offset %d "
501 "size %d\n", dev->rd_dev_id,
502 rd_page, rd_offset, rd_size);
503 len = rd_size;
504 }
505 m.consumed = len;
506
507 rd_addr = sg_virt(rd_sg) + rd_offset;
508
509 if (data_direction == DMA_FROM_DEVICE)
510 memcpy(m.addr, rd_addr, len);
511 else
512 memcpy(rd_addr, m.addr, len);
513
514 rd_size -= len;
515 if (!rd_size)
516 continue;
517
518 src_len -= len;
519 if (src_len) {
520 rd_offset += len;
521 continue;
522 }
523
524 /* rd page completed, next one please */
525 rd_page++;
526 rd_offset = 0;
527 src_len = PAGE_SIZE;
528 if (rd_page <= table->page_end_offset) {
529 rd_sg++;
530 continue;
531 }
532
533 table = rd_get_sg_table(dev, rd_page);
534 if (!table) {
535 sg_miter_stop(&m);
536 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
537 }
538
539 /* since we increment, the first sg entry is correct */
540 rd_sg = table->sg_table;
541 }
542 sg_miter_stop(&m);
543
544 if (cmd->prot_type && se_dev->dev_attrib.pi_prot_type &&
545 data_direction == DMA_FROM_DEVICE) {
546 rc = rd_do_prot_rw(cmd, true);
547 if (rc)
548 return rc;
549 }
550
551 target_complete_cmd(cmd, SAM_STAT_GOOD);
552 return 0;
553 }
554
555 enum {
556 Opt_rd_pages, Opt_rd_nullio, Opt_err
557 };
558
559 static match_table_t tokens = {
560 {Opt_rd_pages, "rd_pages=%d"},
561 {Opt_rd_nullio, "rd_nullio=%d"},
562 {Opt_err, NULL}
563 };
564
565 static ssize_t rd_set_configfs_dev_params(struct se_device *dev,
566 const char *page, ssize_t count)
567 {
568 struct rd_dev *rd_dev = RD_DEV(dev);
569 char *orig, *ptr, *opts;
570 substring_t args[MAX_OPT_ARGS];
571 int ret = 0, arg, token;
572
573 opts = kstrdup(page, GFP_KERNEL);
574 if (!opts)
575 return -ENOMEM;
576
577 orig = opts;
578
579 while ((ptr = strsep(&opts, ",\n")) != NULL) {
580 if (!*ptr)
581 continue;
582
583 token = match_token(ptr, tokens, args);
584 switch (token) {
585 case Opt_rd_pages:
586 match_int(args, &arg);
587 rd_dev->rd_page_count = arg;
588 pr_debug("RAMDISK: Referencing Page"
589 " Count: %u\n", rd_dev->rd_page_count);
590 rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT;
591 break;
592 case Opt_rd_nullio:
593 match_int(args, &arg);
594 if (arg != 1)
595 break;
596
597 pr_debug("RAMDISK: Setting NULLIO flag: %d\n", arg);
598 rd_dev->rd_flags |= RDF_NULLIO;
599 break;
600 default:
601 break;
602 }
603 }
604
605 kfree(orig);
606 return (!ret) ? count : ret;
607 }
608
609 static ssize_t rd_show_configfs_dev_params(struct se_device *dev, char *b)
610 {
611 struct rd_dev *rd_dev = RD_DEV(dev);
612
613 ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: rd_mcp\n",
614 rd_dev->rd_dev_id);
615 bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu"
616 " SG_table_count: %u nullio: %d\n", rd_dev->rd_page_count,
617 PAGE_SIZE, rd_dev->sg_table_count,
618 !!(rd_dev->rd_flags & RDF_NULLIO));
619 return bl;
620 }
621
622 static sector_t rd_get_blocks(struct se_device *dev)
623 {
624 struct rd_dev *rd_dev = RD_DEV(dev);
625
626 unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) /
627 dev->dev_attrib.block_size) - 1;
628
629 return blocks_long;
630 }
631
632 static int rd_init_prot(struct se_device *dev)
633 {
634 struct rd_dev *rd_dev = RD_DEV(dev);
635
636 if (!dev->dev_attrib.pi_prot_type)
637 return 0;
638
639 return rd_build_prot_space(rd_dev, dev->prot_length,
640 dev->dev_attrib.block_size);
641 }
642
643 static void rd_free_prot(struct se_device *dev)
644 {
645 struct rd_dev *rd_dev = RD_DEV(dev);
646
647 rd_release_prot_space(rd_dev);
648 }
649
650 static struct sbc_ops rd_sbc_ops = {
651 .execute_rw = rd_execute_rw,
652 };
653
654 static sense_reason_t
655 rd_parse_cdb(struct se_cmd *cmd)
656 {
657 return sbc_parse_cdb(cmd, &rd_sbc_ops);
658 }
659
660 static const struct target_backend_ops rd_mcp_ops = {
661 .name = "rd_mcp",
662 .inquiry_prod = "RAMDISK-MCP",
663 .inquiry_rev = RD_MCP_VERSION,
664 .attach_hba = rd_attach_hba,
665 .detach_hba = rd_detach_hba,
666 .alloc_device = rd_alloc_device,
667 .configure_device = rd_configure_device,
668 .free_device = rd_free_device,
669 .parse_cdb = rd_parse_cdb,
670 .set_configfs_dev_params = rd_set_configfs_dev_params,
671 .show_configfs_dev_params = rd_show_configfs_dev_params,
672 .get_device_type = sbc_get_device_type,
673 .get_blocks = rd_get_blocks,
674 .init_prot = rd_init_prot,
675 .free_prot = rd_free_prot,
676 .tb_dev_attrib_attrs = sbc_attrib_attrs,
677 };
678
679 int __init rd_module_init(void)
680 {
681 return transport_backend_register(&rd_mcp_ops);
682 }
683
684 void rd_module_exit(void)
685 {
686 target_backend_unregister(&rd_mcp_ops);
687 }
Linux with added FPC-III support