Commit | Line | Data |
---|---|---|
138c014d | 1 | /* |
1da177e4 LT |
2 | * File...........: linux/drivers/s390/block/dasd_fba.c |
3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> | |
4 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 5 | * Copyright IBM Corp. 1999, 2009 |
1da177e4 LT |
6 | */ |
7 | ||
ca99dab0 | 8 | #define KMSG_COMPONENT "dasd-fba" |
fc19f381 | 9 | |
1da177e4 LT |
10 | #include <linux/stddef.h> |
11 | #include <linux/kernel.h> | |
12 | #include <asm/debug.h> | |
13 | ||
14 | #include <linux/slab.h> | |
15 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
16 | #include <linux/bio.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
19 | ||
20 | #include <asm/idals.h> | |
21 | #include <asm/ebcdic.h> | |
22 | #include <asm/io.h> | |
1da177e4 LT |
23 | #include <asm/ccwdev.h> |
24 | ||
25 | #include "dasd_int.h" | |
26 | #include "dasd_fba.h" | |
27 | ||
28 | #ifdef PRINTK_HEADER | |
29 | #undef PRINTK_HEADER | |
30 | #endif /* PRINTK_HEADER */ | |
31 | #define PRINTK_HEADER "dasd(fba):" | |
32 | ||
33 | #define DASD_FBA_CCW_WRITE 0x41 | |
34 | #define DASD_FBA_CCW_READ 0x42 | |
35 | #define DASD_FBA_CCW_LOCATE 0x43 | |
36 | #define DASD_FBA_CCW_DEFINE_EXTENT 0x63 | |
37 | ||
38 | MODULE_LICENSE("GPL"); | |
39 | ||
40 | static struct dasd_discipline dasd_fba_discipline; | |
41 | ||
42 | struct dasd_fba_private { | |
43 | struct dasd_fba_characteristics rdc_data; | |
44 | }; | |
45 | ||
46 | static struct ccw_device_id dasd_fba_ids[] = { | |
d2c993d8 HC |
47 | { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1}, |
48 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2}, | |
1da177e4 LT |
49 | { /* end of list */ }, |
50 | }; | |
51 | ||
52 | MODULE_DEVICE_TABLE(ccw, dasd_fba_ids); | |
53 | ||
54 | static struct ccw_driver dasd_fba_driver; /* see below */ | |
55 | static int | |
56 | dasd_fba_probe(struct ccw_device *cdev) | |
57 | { | |
40545573 | 58 | return dasd_generic_probe(cdev, &dasd_fba_discipline); |
1da177e4 LT |
59 | } |
60 | ||
61 | static int | |
62 | dasd_fba_set_online(struct ccw_device *cdev) | |
63 | { | |
40545573 | 64 | return dasd_generic_set_online(cdev, &dasd_fba_discipline); |
1da177e4 LT |
65 | } |
66 | ||
67 | static struct ccw_driver dasd_fba_driver = { | |
68 | .name = "dasd-fba", | |
69 | .owner = THIS_MODULE, | |
70 | .ids = dasd_fba_ids, | |
71 | .probe = dasd_fba_probe, | |
72 | .remove = dasd_generic_remove, | |
73 | .set_offline = dasd_generic_set_offline, | |
74 | .set_online = dasd_fba_set_online, | |
75 | .notify = dasd_generic_notify, | |
d41dd122 SH |
76 | .freeze = dasd_generic_pm_freeze, |
77 | .thaw = dasd_generic_restore_device, | |
78 | .restore = dasd_generic_restore_device, | |
1da177e4 LT |
79 | }; |
80 | ||
4d284cac | 81 | static void |
1da177e4 LT |
82 | define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw, |
83 | int blksize, int beg, int nr) | |
84 | { | |
85 | ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT; | |
86 | ccw->flags = 0; | |
87 | ccw->count = 16; | |
88 | ccw->cda = (__u32) __pa(data); | |
89 | memset(data, 0, sizeof (struct DE_fba_data)); | |
90 | if (rw == WRITE) | |
91 | (data->mask).perm = 0x0; | |
92 | else if (rw == READ) | |
93 | (data->mask).perm = 0x1; | |
94 | else | |
95 | data->mask.perm = 0x2; | |
96 | data->blk_size = blksize; | |
97 | data->ext_loc = beg; | |
98 | data->ext_end = nr - 1; | |
99 | } | |
100 | ||
4d284cac | 101 | static void |
1da177e4 LT |
102 | locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, |
103 | int block_nr, int block_ct) | |
104 | { | |
105 | ccw->cmd_code = DASD_FBA_CCW_LOCATE; | |
106 | ccw->flags = 0; | |
107 | ccw->count = 8; | |
108 | ccw->cda = (__u32) __pa(data); | |
109 | memset(data, 0, sizeof (struct LO_fba_data)); | |
110 | if (rw == WRITE) | |
111 | data->operation.cmd = 0x5; | |
112 | else if (rw == READ) | |
113 | data->operation.cmd = 0x6; | |
114 | else | |
115 | data->operation.cmd = 0x8; | |
116 | data->blk_nr = block_nr; | |
117 | data->blk_ct = block_ct; | |
118 | } | |
119 | ||
120 | static int | |
121 | dasd_fba_check_characteristics(struct dasd_device *device) | |
122 | { | |
8e09f215 | 123 | struct dasd_block *block; |
1da177e4 | 124 | struct dasd_fba_private *private; |
138c014d | 125 | struct ccw_device *cdev = device->cdev; |
1da177e4 LT |
126 | int rc; |
127 | ||
128 | private = (struct dasd_fba_private *) device->private; | |
92636b15 SO |
129 | if (!private) { |
130 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
131 | if (!private) { | |
fc19f381 SH |
132 | dev_warn(&device->cdev->dev, |
133 | "Allocating memory for private DASD " | |
134 | "data failed\n"); | |
1da177e4 LT |
135 | return -ENOMEM; |
136 | } | |
137 | device->private = (void *) private; | |
92636b15 SO |
138 | } else { |
139 | memset(private, 0, sizeof(*private)); | |
1da177e4 | 140 | } |
8e09f215 SW |
141 | block = dasd_alloc_block(); |
142 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
143 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate " |
144 | "dasd block structure"); | |
7337194f CH |
145 | device->private = NULL; |
146 | kfree(private); | |
8e09f215 SW |
147 | return PTR_ERR(block); |
148 | } | |
149 | device->block = block; | |
150 | block->base = device; | |
151 | ||
1da177e4 | 152 | /* Read Device Characteristics */ |
68b781fe SH |
153 | rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC, |
154 | &private->rdc_data, 32); | |
1da177e4 | 155 | if (rc) { |
b8ed5dd5 SH |
156 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device " |
157 | "characteristics returned error %d", rc); | |
7337194f CH |
158 | device->block = NULL; |
159 | dasd_free_block(block); | |
160 | device->private = NULL; | |
161 | kfree(private); | |
1da177e4 LT |
162 | return rc; |
163 | } | |
164 | ||
fc19f381 SH |
165 | dev_info(&device->cdev->dev, |
166 | "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB " | |
167 | "and %d B/blk\n", | |
168 | cdev->id.dev_type, | |
169 | cdev->id.dev_model, | |
170 | cdev->id.cu_type, | |
171 | cdev->id.cu_model, | |
172 | ((private->rdc_data.blk_bdsa * | |
173 | (private->rdc_data.blk_size >> 9)) >> 11), | |
174 | private->rdc_data.blk_size); | |
1da177e4 LT |
175 | return 0; |
176 | } | |
177 | ||
8e09f215 | 178 | static int dasd_fba_do_analysis(struct dasd_block *block) |
1da177e4 LT |
179 | { |
180 | struct dasd_fba_private *private; | |
181 | int sb, rc; | |
182 | ||
8e09f215 | 183 | private = (struct dasd_fba_private *) block->base->private; |
1da177e4 LT |
184 | rc = dasd_check_blocksize(private->rdc_data.blk_size); |
185 | if (rc) { | |
fc19f381 | 186 | DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d", |
1da177e4 LT |
187 | private->rdc_data.blk_size); |
188 | return rc; | |
189 | } | |
8e09f215 SW |
190 | block->blocks = private->rdc_data.blk_bdsa; |
191 | block->bp_block = private->rdc_data.blk_size; | |
192 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ | |
1da177e4 | 193 | for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) |
8e09f215 | 194 | block->s2b_shift++; |
1da177e4 LT |
195 | return 0; |
196 | } | |
197 | ||
8e09f215 SW |
198 | static int dasd_fba_fill_geometry(struct dasd_block *block, |
199 | struct hd_geometry *geo) | |
1da177e4 | 200 | { |
8e09f215 | 201 | if (dasd_check_blocksize(block->bp_block) != 0) |
1da177e4 | 202 | return -EINVAL; |
8e09f215 | 203 | geo->cylinders = (block->blocks << block->s2b_shift) >> 10; |
1da177e4 | 204 | geo->heads = 16; |
8e09f215 | 205 | geo->sectors = 128 >> block->s2b_shift; |
1da177e4 LT |
206 | return 0; |
207 | } | |
208 | ||
1da177e4 LT |
209 | static dasd_erp_fn_t |
210 | dasd_fba_erp_action(struct dasd_ccw_req * cqr) | |
211 | { | |
212 | return dasd_default_erp_action; | |
213 | } | |
214 | ||
215 | static dasd_erp_fn_t | |
216 | dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) | |
217 | { | |
218 | if (cqr->function == dasd_default_erp_action) | |
219 | return dasd_default_erp_postaction; | |
220 | ||
fc19f381 | 221 | DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p", |
1da177e4 LT |
222 | cqr->function); |
223 | return NULL; | |
224 | } | |
225 | ||
8e09f215 SW |
226 | static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device, |
227 | struct irb *irb) | |
228 | { | |
229 | char mask; | |
230 | ||
231 | /* first of all check for state change pending interrupt */ | |
232 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
23d805b6 | 233 | if ((irb->scsw.cmd.dstat & mask) == mask) { |
8e09f215 SW |
234 | dasd_generic_handle_state_change(device); |
235 | return; | |
236 | } | |
237 | ||
238 | /* check for unsolicited interrupts */ | |
fc19f381 | 239 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
8e09f215 | 240 | "unsolicited interrupt received"); |
aeec92ca | 241 | device->discipline->dump_sense_dbf(device, irb, "unsolicited"); |
8e09f215 SW |
242 | dasd_schedule_device_bh(device); |
243 | return; | |
244 | }; | |
245 | ||
246 | static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev, | |
247 | struct dasd_block *block, | |
248 | struct request *req) | |
1da177e4 LT |
249 | { |
250 | struct dasd_fba_private *private; | |
251 | unsigned long *idaws; | |
252 | struct LO_fba_data *LO_data; | |
253 | struct dasd_ccw_req *cqr; | |
254 | struct ccw1 *ccw; | |
5705f702 | 255 | struct req_iterator iter; |
1da177e4 LT |
256 | struct bio_vec *bv; |
257 | char *dst; | |
258 | int count, cidaw, cplength, datasize; | |
259 | sector_t recid, first_rec, last_rec; | |
260 | unsigned int blksize, off; | |
261 | unsigned char cmd; | |
1da177e4 | 262 | |
8e09f215 | 263 | private = (struct dasd_fba_private *) block->base->private; |
1da177e4 LT |
264 | if (rq_data_dir(req) == READ) { |
265 | cmd = DASD_FBA_CCW_READ; | |
266 | } else if (rq_data_dir(req) == WRITE) { | |
267 | cmd = DASD_FBA_CCW_WRITE; | |
268 | } else | |
269 | return ERR_PTR(-EINVAL); | |
8e09f215 | 270 | blksize = block->bp_block; |
1da177e4 | 271 | /* Calculate record id of first and last block. */ |
83096ebf TH |
272 | first_rec = blk_rq_pos(req) >> block->s2b_shift; |
273 | last_rec = | |
274 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; | |
1da177e4 LT |
275 | /* Check struct bio and count the number of blocks for the request. */ |
276 | count = 0; | |
277 | cidaw = 0; | |
5705f702 | 278 | rq_for_each_segment(bv, req, iter) { |
6c92e699 JA |
279 | if (bv->bv_len & (blksize - 1)) |
280 | /* Fba can only do full blocks. */ | |
281 | return ERR_PTR(-EINVAL); | |
8e09f215 | 282 | count += bv->bv_len >> (block->s2b_shift + 9); |
347a8dc3 | 283 | #if defined(CONFIG_64BIT) |
6c92e699 JA |
284 | if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) |
285 | cidaw += bv->bv_len / blksize; | |
1da177e4 | 286 | #endif |
1da177e4 LT |
287 | } |
288 | /* Paranoia. */ | |
289 | if (count != last_rec - first_rec + 1) | |
290 | return ERR_PTR(-EINVAL); | |
291 | /* 1x define extent + 1x locate record + number of blocks */ | |
292 | cplength = 2 + count; | |
293 | /* 1x define extent + 1x locate record */ | |
294 | datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) + | |
295 | cidaw * sizeof(unsigned long); | |
296 | /* | |
297 | * Find out number of additional locate record ccws if the device | |
298 | * can't do data chaining. | |
299 | */ | |
300 | if (private->rdc_data.mode.bits.data_chain == 0) { | |
301 | cplength += count - 1; | |
302 | datasize += (count - 1)*sizeof(struct LO_fba_data); | |
303 | } | |
304 | /* Allocate the ccw request. */ | |
68b781fe | 305 | cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev); |
1da177e4 LT |
306 | if (IS_ERR(cqr)) |
307 | return cqr; | |
308 | ccw = cqr->cpaddr; | |
309 | /* First ccw is define extent. */ | |
310 | define_extent(ccw++, cqr->data, rq_data_dir(req), | |
83096ebf | 311 | block->bp_block, blk_rq_pos(req), blk_rq_sectors(req)); |
1da177e4 LT |
312 | /* Build locate_record + read/write ccws. */ |
313 | idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); | |
314 | LO_data = (struct LO_fba_data *) (idaws + cidaw); | |
315 | /* Locate record for all blocks for smart devices. */ | |
316 | if (private->rdc_data.mode.bits.data_chain != 0) { | |
317 | ccw[-1].flags |= CCW_FLAG_CC; | |
318 | locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); | |
319 | } | |
320 | recid = first_rec; | |
5705f702 | 321 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
322 | dst = page_address(bv->bv_page) + bv->bv_offset; |
323 | if (dasd_page_cache) { | |
324 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 325 | GFP_DMA | __GFP_NOWARN); |
1da177e4 LT |
326 | if (copy && rq_data_dir(req) == WRITE) |
327 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); | |
328 | if (copy) | |
329 | dst = copy + bv->bv_offset; | |
330 | } | |
331 | for (off = 0; off < bv->bv_len; off += blksize) { | |
332 | /* Locate record for stupid devices. */ | |
333 | if (private->rdc_data.mode.bits.data_chain == 0) { | |
334 | ccw[-1].flags |= CCW_FLAG_CC; | |
335 | locate_record(ccw, LO_data++, | |
336 | rq_data_dir(req), | |
337 | recid - first_rec, 1); | |
338 | ccw->flags = CCW_FLAG_CC; | |
339 | ccw++; | |
340 | } else { | |
341 | if (recid > first_rec) | |
342 | ccw[-1].flags |= CCW_FLAG_DC; | |
343 | else | |
344 | ccw[-1].flags |= CCW_FLAG_CC; | |
345 | } | |
346 | ccw->cmd_code = cmd; | |
8e09f215 | 347 | ccw->count = block->bp_block; |
1da177e4 LT |
348 | if (idal_is_needed(dst, blksize)) { |
349 | ccw->cda = (__u32)(addr_t) idaws; | |
350 | ccw->flags = CCW_FLAG_IDA; | |
351 | idaws = idal_create_words(idaws, dst, blksize); | |
352 | } else { | |
353 | ccw->cda = (__u32)(addr_t) dst; | |
354 | ccw->flags = 0; | |
355 | } | |
356 | ccw++; | |
357 | dst += blksize; | |
358 | recid++; | |
359 | } | |
360 | } | |
13de227b HS |
361 | if (blk_noretry_request(req) || |
362 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 363 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
364 | cqr->startdev = memdev; |
365 | cqr->memdev = memdev; | |
366 | cqr->block = block; | |
1da177e4 | 367 | cqr->expires = 5 * 60 * HZ; /* 5 minutes */ |
d61f6f3d HH |
368 | cqr->retries = 32; |
369 | cqr->buildclk = get_clock(); | |
1da177e4 LT |
370 | cqr->status = DASD_CQR_FILLED; |
371 | return cqr; | |
372 | } | |
373 | ||
374 | static int | |
375 | dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
376 | { | |
377 | struct dasd_fba_private *private; | |
378 | struct ccw1 *ccw; | |
5705f702 | 379 | struct req_iterator iter; |
1da177e4 LT |
380 | struct bio_vec *bv; |
381 | char *dst, *cda; | |
382 | unsigned int blksize, off; | |
5705f702 | 383 | int status; |
1da177e4 LT |
384 | |
385 | if (!dasd_page_cache) | |
386 | goto out; | |
8e09f215 SW |
387 | private = (struct dasd_fba_private *) cqr->block->base->private; |
388 | blksize = cqr->block->bp_block; | |
1da177e4 LT |
389 | ccw = cqr->cpaddr; |
390 | /* Skip over define extent & locate record. */ | |
391 | ccw++; | |
392 | if (private->rdc_data.mode.bits.data_chain != 0) | |
393 | ccw++; | |
5705f702 | 394 | rq_for_each_segment(bv, req, iter) { |
1da177e4 LT |
395 | dst = page_address(bv->bv_page) + bv->bv_offset; |
396 | for (off = 0; off < bv->bv_len; off += blksize) { | |
397 | /* Skip locate record. */ | |
398 | if (private->rdc_data.mode.bits.data_chain == 0) | |
399 | ccw++; | |
400 | if (dst) { | |
401 | if (ccw->flags & CCW_FLAG_IDA) | |
402 | cda = *((char **)((addr_t) ccw->cda)); | |
403 | else | |
404 | cda = (char *)((addr_t) ccw->cda); | |
405 | if (dst != cda) { | |
406 | if (rq_data_dir(req) == READ) | |
407 | memcpy(dst, cda, bv->bv_len); | |
408 | kmem_cache_free(dasd_page_cache, | |
409 | (void *)((addr_t)cda & PAGE_MASK)); | |
410 | } | |
411 | dst = NULL; | |
412 | } | |
413 | ccw++; | |
414 | } | |
415 | } | |
416 | out: | |
417 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 418 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
419 | return status; |
420 | } | |
421 | ||
8e09f215 SW |
422 | static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr) |
423 | { | |
424 | cqr->status = DASD_CQR_FILLED; | |
425 | }; | |
426 | ||
1da177e4 LT |
427 | static int |
428 | dasd_fba_fill_info(struct dasd_device * device, | |
429 | struct dasd_information2_t * info) | |
430 | { | |
431 | info->label_block = 1; | |
432 | info->FBA_layout = 1; | |
433 | info->format = DASD_FORMAT_LDL; | |
434 | info->characteristics_size = sizeof(struct dasd_fba_characteristics); | |
435 | memcpy(info->characteristics, | |
436 | &((struct dasd_fba_private *) device->private)->rdc_data, | |
437 | sizeof (struct dasd_fba_characteristics)); | |
438 | info->confdata_size = 0; | |
439 | return 0; | |
440 | } | |
441 | ||
fc19f381 | 442 | static void |
aeec92ca SH |
443 | dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
444 | char *reason) | |
fc19f381 | 445 | { |
aeec92ca SH |
446 | u64 *sense; |
447 | ||
448 | sense = (u64 *) dasd_get_sense(irb); | |
449 | if (sense) { | |
450 | DBF_DEV_EVENT(DBF_EMERG, device, | |
451 | "%s: %s %02x%02x%02x %016llx %016llx %016llx " | |
452 | "%016llx", reason, | |
453 | scsw_is_tm(&irb->scsw) ? "t" : "c", | |
454 | scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), | |
455 | scsw_dstat(&irb->scsw), sense[0], sense[1], | |
456 | sense[2], sense[3]); | |
fc19f381 SH |
457 | } else { |
458 | DBF_DEV_EVENT(DBF_EMERG, device, "%s", | |
459 | "SORRY - NO VALID SENSE AVAILABLE\n"); | |
460 | } | |
461 | } | |
462 | ||
463 | ||
1da177e4 LT |
464 | static void |
465 | dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, | |
466 | struct irb *irb) | |
467 | { | |
468 | char *page; | |
469 | struct ccw1 *act, *end, *last; | |
470 | int len, sl, sct, count; | |
471 | ||
472 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
473 | if (page == NULL) { | |
fc19f381 | 474 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
475 | "No memory to dump sense data"); |
476 | return; | |
477 | } | |
478 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
479 | " I/O status report for device %s:\n", | |
2a0217d5 | 480 | dev_name(&device->cdev->dev)); |
1da177e4 LT |
481 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
482 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, | |
23d805b6 | 483 | irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); |
1da177e4 LT |
484 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
485 | " device %s: Failing CCW: %p\n", | |
2a0217d5 | 486 | dev_name(&device->cdev->dev), |
23d805b6 | 487 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
488 | if (irb->esw.esw0.erw.cons) { |
489 | for (sl = 0; sl < 4; sl++) { | |
490 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
491 | " Sense(hex) %2d-%2d:", | |
492 | (8 * sl), ((8 * sl) + 7)); | |
493 | ||
494 | for (sct = 0; sct < 8; sct++) { | |
495 | len += sprintf(page + len, " %02x", | |
496 | irb->ecw[8 * sl + sct]); | |
497 | } | |
498 | len += sprintf(page + len, "\n"); | |
499 | } | |
500 | } else { | |
501 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
502 | " SORRY - NO VALID SENSE AVAILABLE\n"); | |
503 | } | |
fc19f381 | 504 | printk(KERN_ERR "%s", page); |
1da177e4 LT |
505 | |
506 | /* dump the Channel Program */ | |
507 | /* print first CCWs (maximum 8) */ | |
508 | act = req->cpaddr; | |
509 | for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
510 | end = min(act + 8, last); | |
511 | len = sprintf(page, KERN_ERR PRINTK_HEADER | |
512 | " Related CP in req: %p\n", req); | |
513 | while (act <= end) { | |
514 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
515 | " CCW %p: %08X %08X DAT:", | |
516 | act, ((int *) act)[0], ((int *) act)[1]); | |
517 | for (count = 0; count < 32 && count < act->count; | |
518 | count += sizeof(int)) | |
519 | len += sprintf(page + len, " %08X", | |
520 | ((int *) (addr_t) act->cda) | |
521 | [(count>>2)]); | |
522 | len += sprintf(page + len, "\n"); | |
523 | act++; | |
524 | } | |
fc19f381 | 525 | printk(KERN_ERR "%s", page); |
1da177e4 LT |
526 | |
527 | ||
528 | /* print failing CCW area */ | |
529 | len = 0; | |
23d805b6 PO |
530 | if (act < ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) { |
531 | act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2; | |
1da177e4 LT |
532 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); |
533 | } | |
23d805b6 | 534 | end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last); |
1da177e4 LT |
535 | while (act <= end) { |
536 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
537 | " CCW %p: %08X %08X DAT:", | |
538 | act, ((int *) act)[0], ((int *) act)[1]); | |
539 | for (count = 0; count < 32 && count < act->count; | |
540 | count += sizeof(int)) | |
541 | len += sprintf(page + len, " %08X", | |
542 | ((int *) (addr_t) act->cda) | |
543 | [(count>>2)]); | |
544 | len += sprintf(page + len, "\n"); | |
545 | act++; | |
546 | } | |
547 | ||
548 | /* print last CCWs */ | |
549 | if (act < last - 2) { | |
550 | act = last - 2; | |
551 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); | |
552 | } | |
553 | while (act <= last) { | |
554 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER | |
555 | " CCW %p: %08X %08X DAT:", | |
556 | act, ((int *) act)[0], ((int *) act)[1]); | |
557 | for (count = 0; count < 32 && count < act->count; | |
558 | count += sizeof(int)) | |
559 | len += sprintf(page + len, " %08X", | |
560 | ((int *) (addr_t) act->cda) | |
561 | [(count>>2)]); | |
562 | len += sprintf(page + len, "\n"); | |
563 | act++; | |
564 | } | |
565 | if (len > 0) | |
fc19f381 | 566 | printk(KERN_ERR "%s", page); |
1da177e4 LT |
567 | free_page((unsigned long) page); |
568 | } | |
569 | ||
570 | /* | |
571 | * max_blocks is dependent on the amount of storage that is available | |
572 | * in the static io buffer for each device. Currently each device has | |
573 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
574 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
575 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
138c014d | 576 | * addition we have one define extent ccw + 16 bytes of data and a |
1da177e4 LT |
577 | * locate record ccw for each block (stupid devices!) + 16 bytes of data. |
578 | * That makes: | |
579 | * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum. | |
580 | * We want to fit two into the available memory so that we can immediately | |
581 | * start the next request if one finishes off. That makes 100.1 blocks | |
582 | * for one request. Give a little safety and the result is 96. | |
583 | */ | |
584 | static struct dasd_discipline dasd_fba_discipline = { | |
585 | .owner = THIS_MODULE, | |
586 | .name = "FBA ", | |
587 | .ebcname = "FBA ", | |
588 | .max_blocks = 96, | |
589 | .check_device = dasd_fba_check_characteristics, | |
590 | .do_analysis = dasd_fba_do_analysis, | |
591 | .fill_geometry = dasd_fba_fill_geometry, | |
592 | .start_IO = dasd_start_IO, | |
593 | .term_IO = dasd_term_IO, | |
8e09f215 | 594 | .handle_terminated_request = dasd_fba_handle_terminated_request, |
1da177e4 LT |
595 | .erp_action = dasd_fba_erp_action, |
596 | .erp_postaction = dasd_fba_erp_postaction, | |
8e09f215 | 597 | .handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt, |
1da177e4 LT |
598 | .build_cp = dasd_fba_build_cp, |
599 | .free_cp = dasd_fba_free_cp, | |
600 | .dump_sense = dasd_fba_dump_sense, | |
fc19f381 | 601 | .dump_sense_dbf = dasd_fba_dump_sense_dbf, |
1da177e4 LT |
602 | .fill_info = dasd_fba_fill_info, |
603 | }; | |
604 | ||
605 | static int __init | |
606 | dasd_fba_init(void) | |
607 | { | |
736e6ea0 SO |
608 | int ret; |
609 | ||
1da177e4 | 610 | ASCEBC(dasd_fba_discipline.ebcname, 4); |
736e6ea0 SO |
611 | ret = ccw_driver_register(&dasd_fba_driver); |
612 | if (!ret) | |
613 | wait_for_device_probe(); | |
614 | ||
615 | return ret; | |
1da177e4 LT |
616 | } |
617 | ||
618 | static void __exit | |
619 | dasd_fba_cleanup(void) | |
620 | { | |
621 | ccw_driver_unregister(&dasd_fba_driver); | |
622 | } | |
623 | ||
624 | module_init(dasd_fba_init); | |
625 | module_exit(dasd_fba_cleanup); |