Commit | Line | Data |
---|---|---|
138c014d | 1 | /* |
1da177e4 LT |
2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
3 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 4 | * Copyright IBM Corp. 1999, 2009 |
1da177e4 LT |
5 | */ |
6 | ||
ca99dab0 | 7 | #define KMSG_COMPONENT "dasd-fba" |
fc19f381 | 8 | |
1da177e4 LT |
9 | #include <linux/stddef.h> |
10 | #include <linux/kernel.h> | |
11 | #include <asm/debug.h> | |
12 | ||
13 | #include <linux/slab.h> | |
14 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
15 | #include <linux/bio.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | ||
19 | #include <asm/idals.h> | |
20 | #include <asm/ebcdic.h> | |
21 | #include <asm/io.h> | |
1da177e4 LT |
22 | #include <asm/ccwdev.h> |
23 | ||
24 | #include "dasd_int.h" | |
25 | #include "dasd_fba.h" | |
26 | ||
27 | #ifdef PRINTK_HEADER | |
28 | #undef PRINTK_HEADER | |
29 | #endif /* PRINTK_HEADER */ | |
30 | #define PRINTK_HEADER "dasd(fba):" | |
31 | ||
1f1ee9ad HR |
32 | #define FBA_DEFAULT_RETRIES 32 |
33 | ||
1da177e4 LT |
34 | #define DASD_FBA_CCW_WRITE 0x41 |
35 | #define DASD_FBA_CCW_READ 0x42 | |
36 | #define DASD_FBA_CCW_LOCATE 0x43 | |
37 | #define DASD_FBA_CCW_DEFINE_EXTENT 0x63 | |
38 | ||
39 | MODULE_LICENSE("GPL"); | |
40 | ||
41 | static struct dasd_discipline dasd_fba_discipline; | |
42 | ||
43 | struct dasd_fba_private { | |
44 | struct dasd_fba_characteristics rdc_data; | |
45 | }; | |
46 | ||
47 | static struct ccw_device_id dasd_fba_ids[] = { | |
d2c993d8 HC |
48 | { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1}, |
49 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2}, | |
1da177e4 LT |
50 | { /* end of list */ }, |
51 | }; | |
52 | ||
53 | MODULE_DEVICE_TABLE(ccw, dasd_fba_ids); | |
54 | ||
55 | static struct ccw_driver dasd_fba_driver; /* see below */ | |
56 | static int | |
57 | dasd_fba_probe(struct ccw_device *cdev) | |
58 | { | |
40545573 | 59 | return dasd_generic_probe(cdev, &dasd_fba_discipline); |
1da177e4 LT |
60 | } |
61 | ||
62 | static int | |
63 | dasd_fba_set_online(struct ccw_device *cdev) | |
64 | { | |
40545573 | 65 | return dasd_generic_set_online(cdev, &dasd_fba_discipline); |
1da177e4 LT |
66 | } |
67 | ||
68 | static struct ccw_driver dasd_fba_driver = { | |
3bda058b SO |
69 | .driver = { |
70 | .name = "dasd-fba", | |
71 | .owner = THIS_MODULE, | |
72 | }, | |
1da177e4 LT |
73 | .ids = dasd_fba_ids, |
74 | .probe = dasd_fba_probe, | |
75 | .remove = dasd_generic_remove, | |
76 | .set_offline = dasd_generic_set_offline, | |
77 | .set_online = dasd_fba_set_online, | |
78 | .notify = dasd_generic_notify, | |
a4d26c6a | 79 | .path_event = dasd_generic_path_event, |
d41dd122 SH |
80 | .freeze = dasd_generic_pm_freeze, |
81 | .thaw = dasd_generic_restore_device, | |
82 | .restore = dasd_generic_restore_device, | |
420f42ec | 83 | .int_class = IRQIO_DAS, |
1da177e4 LT |
84 | }; |
85 | ||
4d284cac | 86 | static void |
1da177e4 LT |
87 | define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw, |
88 | int blksize, int beg, int nr) | |
89 | { | |
90 | ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT; | |
91 | ccw->flags = 0; | |
92 | ccw->count = 16; | |
93 | ccw->cda = (__u32) __pa(data); | |
94 | memset(data, 0, sizeof (struct DE_fba_data)); | |
95 | if (rw == WRITE) | |
96 | (data->mask).perm = 0x0; | |
97 | else if (rw == READ) | |
98 | (data->mask).perm = 0x1; | |
99 | else | |
100 | data->mask.perm = 0x2; | |
101 | data->blk_size = blksize; | |
102 | data->ext_loc = beg; | |
103 | data->ext_end = nr - 1; | |
104 | } | |
105 | ||
4d284cac | 106 | static void |
1da177e4 LT |
107 | locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, |
108 | int block_nr, int block_ct) | |
109 | { | |
110 | ccw->cmd_code = DASD_FBA_CCW_LOCATE; | |
111 | ccw->flags = 0; | |
112 | ccw->count = 8; | |
113 | ccw->cda = (__u32) __pa(data); | |
114 | memset(data, 0, sizeof (struct LO_fba_data)); | |
115 | if (rw == WRITE) | |
116 | data->operation.cmd = 0x5; | |
117 | else if (rw == READ) | |
118 | data->operation.cmd = 0x6; | |
119 | else | |
120 | data->operation.cmd = 0x8; | |
121 | data->blk_nr = block_nr; | |
122 | data->blk_ct = block_ct; | |
123 | } | |
124 | ||
125 | static int | |
126 | dasd_fba_check_characteristics(struct dasd_device *device) | |
127 | { | |
8e09f215 | 128 | struct dasd_block *block; |
1da177e4 | 129 | struct dasd_fba_private *private; |
138c014d | 130 | struct ccw_device *cdev = device->cdev; |
1da177e4 | 131 | int rc; |
33b62a30 | 132 | int readonly; |
1da177e4 LT |
133 | |
134 | private = (struct dasd_fba_private *) device->private; | |
92636b15 SO |
135 | if (!private) { |
136 | private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); | |
137 | if (!private) { | |
fc19f381 SH |
138 | dev_warn(&device->cdev->dev, |
139 | "Allocating memory for private DASD " | |
140 | "data failed\n"); | |
1da177e4 LT |
141 | return -ENOMEM; |
142 | } | |
143 | device->private = (void *) private; | |
92636b15 SO |
144 | } else { |
145 | memset(private, 0, sizeof(*private)); | |
1da177e4 | 146 | } |
8e09f215 SW |
147 | block = dasd_alloc_block(); |
148 | if (IS_ERR(block)) { | |
b8ed5dd5 SH |
149 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate " |
150 | "dasd block structure"); | |
7337194f CH |
151 | device->private = NULL; |
152 | kfree(private); | |
8e09f215 SW |
153 | return PTR_ERR(block); |
154 | } | |
155 | device->block = block; | |
156 | block->base = device; | |
157 | ||
1da177e4 | 158 | /* Read Device Characteristics */ |
68b781fe SH |
159 | rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC, |
160 | &private->rdc_data, 32); | |
1da177e4 | 161 | if (rc) { |
b8ed5dd5 SH |
162 | DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device " |
163 | "characteristics returned error %d", rc); | |
7337194f CH |
164 | device->block = NULL; |
165 | dasd_free_block(block); | |
166 | device->private = NULL; | |
167 | kfree(private); | |
1da177e4 LT |
168 | return rc; |
169 | } | |
170 | ||
7c8faa86 | 171 | device->default_expires = DASD_EXPIRES; |
1f1ee9ad | 172 | device->default_retries = FBA_DEFAULT_RETRIES; |
a4d26c6a | 173 | device->path_data.opm = LPM_ANYPATH; |
7c8faa86 | 174 | |
33b62a30 SW |
175 | readonly = dasd_device_is_ro(device); |
176 | if (readonly) | |
177 | set_bit(DASD_FLAG_DEVICE_RO, &device->flags); | |
178 | ||
fc19f381 SH |
179 | dev_info(&device->cdev->dev, |
180 | "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB " | |
33b62a30 | 181 | "and %d B/blk%s\n", |
fc19f381 SH |
182 | cdev->id.dev_type, |
183 | cdev->id.dev_model, | |
184 | cdev->id.cu_type, | |
185 | cdev->id.cu_model, | |
186 | ((private->rdc_data.blk_bdsa * | |
187 | (private->rdc_data.blk_size >> 9)) >> 11), | |
33b62a30 SW |
188 | private->rdc_data.blk_size, |
189 | readonly ? ", read-only device" : ""); | |
1da177e4 LT |
190 | return 0; |
191 | } | |
192 | ||
8e09f215 | 193 | static int dasd_fba_do_analysis(struct dasd_block *block) |
1da177e4 LT |
194 | { |
195 | struct dasd_fba_private *private; | |
196 | int sb, rc; | |
197 | ||
8e09f215 | 198 | private = (struct dasd_fba_private *) block->base->private; |
1da177e4 LT |
199 | rc = dasd_check_blocksize(private->rdc_data.blk_size); |
200 | if (rc) { | |
fc19f381 | 201 | DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d", |
1da177e4 LT |
202 | private->rdc_data.blk_size); |
203 | return rc; | |
204 | } | |
8e09f215 SW |
205 | block->blocks = private->rdc_data.blk_bdsa; |
206 | block->bp_block = private->rdc_data.blk_size; | |
207 | block->s2b_shift = 0; /* bits to shift 512 to get a block */ | |
1da177e4 | 208 | for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) |
8e09f215 | 209 | block->s2b_shift++; |
1da177e4 LT |
210 | return 0; |
211 | } | |
212 | ||
8e09f215 SW |
213 | static int dasd_fba_fill_geometry(struct dasd_block *block, |
214 | struct hd_geometry *geo) | |
1da177e4 | 215 | { |
8e09f215 | 216 | if (dasd_check_blocksize(block->bp_block) != 0) |
1da177e4 | 217 | return -EINVAL; |
8e09f215 | 218 | geo->cylinders = (block->blocks << block->s2b_shift) >> 10; |
1da177e4 | 219 | geo->heads = 16; |
8e09f215 | 220 | geo->sectors = 128 >> block->s2b_shift; |
1da177e4 LT |
221 | return 0; |
222 | } | |
223 | ||
1da177e4 LT |
224 | static dasd_erp_fn_t |
225 | dasd_fba_erp_action(struct dasd_ccw_req * cqr) | |
226 | { | |
227 | return dasd_default_erp_action; | |
228 | } | |
229 | ||
230 | static dasd_erp_fn_t | |
231 | dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) | |
232 | { | |
233 | if (cqr->function == dasd_default_erp_action) | |
234 | return dasd_default_erp_postaction; | |
235 | ||
fc19f381 | 236 | DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p", |
1da177e4 LT |
237 | cqr->function); |
238 | return NULL; | |
239 | } | |
240 | ||
5a27e60d SW |
241 | static void dasd_fba_check_for_device_change(struct dasd_device *device, |
242 | struct dasd_ccw_req *cqr, | |
243 | struct irb *irb) | |
8e09f215 SW |
244 | { |
245 | char mask; | |
246 | ||
247 | /* first of all check for state change pending interrupt */ | |
248 | mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; | |
5a27e60d | 249 | if ((irb->scsw.cmd.dstat & mask) == mask) |
8e09f215 | 250 | dasd_generic_handle_state_change(device); |
8e09f215 SW |
251 | }; |
252 | ||
253 | static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev, | |
254 | struct dasd_block *block, | |
255 | struct request *req) | |
1da177e4 LT |
256 | { |
257 | struct dasd_fba_private *private; | |
258 | unsigned long *idaws; | |
259 | struct LO_fba_data *LO_data; | |
260 | struct dasd_ccw_req *cqr; | |
261 | struct ccw1 *ccw; | |
5705f702 | 262 | struct req_iterator iter; |
7988613b | 263 | struct bio_vec bv; |
1da177e4 LT |
264 | char *dst; |
265 | int count, cidaw, cplength, datasize; | |
266 | sector_t recid, first_rec, last_rec; | |
267 | unsigned int blksize, off; | |
268 | unsigned char cmd; | |
1da177e4 | 269 | |
8e09f215 | 270 | private = (struct dasd_fba_private *) block->base->private; |
1da177e4 LT |
271 | if (rq_data_dir(req) == READ) { |
272 | cmd = DASD_FBA_CCW_READ; | |
273 | } else if (rq_data_dir(req) == WRITE) { | |
274 | cmd = DASD_FBA_CCW_WRITE; | |
275 | } else | |
276 | return ERR_PTR(-EINVAL); | |
8e09f215 | 277 | blksize = block->bp_block; |
1da177e4 | 278 | /* Calculate record id of first and last block. */ |
83096ebf TH |
279 | first_rec = blk_rq_pos(req) >> block->s2b_shift; |
280 | last_rec = | |
281 | (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; | |
1da177e4 LT |
282 | /* Check struct bio and count the number of blocks for the request. */ |
283 | count = 0; | |
284 | cidaw = 0; | |
5705f702 | 285 | rq_for_each_segment(bv, req, iter) { |
7988613b | 286 | if (bv.bv_len & (blksize - 1)) |
6c92e699 JA |
287 | /* Fba can only do full blocks. */ |
288 | return ERR_PTR(-EINVAL); | |
7988613b | 289 | count += bv.bv_len >> (block->s2b_shift + 9); |
7988613b KO |
290 | if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
291 | cidaw += bv.bv_len / blksize; | |
1da177e4 LT |
292 | } |
293 | /* Paranoia. */ | |
294 | if (count != last_rec - first_rec + 1) | |
295 | return ERR_PTR(-EINVAL); | |
296 | /* 1x define extent + 1x locate record + number of blocks */ | |
297 | cplength = 2 + count; | |
298 | /* 1x define extent + 1x locate record */ | |
299 | datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) + | |
300 | cidaw * sizeof(unsigned long); | |
301 | /* | |
302 | * Find out number of additional locate record ccws if the device | |
303 | * can't do data chaining. | |
304 | */ | |
305 | if (private->rdc_data.mode.bits.data_chain == 0) { | |
306 | cplength += count - 1; | |
307 | datasize += (count - 1)*sizeof(struct LO_fba_data); | |
308 | } | |
309 | /* Allocate the ccw request. */ | |
68b781fe | 310 | cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev); |
1da177e4 LT |
311 | if (IS_ERR(cqr)) |
312 | return cqr; | |
313 | ccw = cqr->cpaddr; | |
314 | /* First ccw is define extent. */ | |
315 | define_extent(ccw++, cqr->data, rq_data_dir(req), | |
83096ebf | 316 | block->bp_block, blk_rq_pos(req), blk_rq_sectors(req)); |
1da177e4 LT |
317 | /* Build locate_record + read/write ccws. */ |
318 | idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); | |
319 | LO_data = (struct LO_fba_data *) (idaws + cidaw); | |
320 | /* Locate record for all blocks for smart devices. */ | |
321 | if (private->rdc_data.mode.bits.data_chain != 0) { | |
322 | ccw[-1].flags |= CCW_FLAG_CC; | |
323 | locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); | |
324 | } | |
325 | recid = first_rec; | |
5705f702 | 326 | rq_for_each_segment(bv, req, iter) { |
7988613b | 327 | dst = page_address(bv.bv_page) + bv.bv_offset; |
1da177e4 LT |
328 | if (dasd_page_cache) { |
329 | char *copy = kmem_cache_alloc(dasd_page_cache, | |
441e143e | 330 | GFP_DMA | __GFP_NOWARN); |
1da177e4 | 331 | if (copy && rq_data_dir(req) == WRITE) |
7988613b | 332 | memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
1da177e4 | 333 | if (copy) |
7988613b | 334 | dst = copy + bv.bv_offset; |
1da177e4 | 335 | } |
7988613b | 336 | for (off = 0; off < bv.bv_len; off += blksize) { |
1da177e4 LT |
337 | /* Locate record for stupid devices. */ |
338 | if (private->rdc_data.mode.bits.data_chain == 0) { | |
339 | ccw[-1].flags |= CCW_FLAG_CC; | |
340 | locate_record(ccw, LO_data++, | |
341 | rq_data_dir(req), | |
342 | recid - first_rec, 1); | |
343 | ccw->flags = CCW_FLAG_CC; | |
344 | ccw++; | |
345 | } else { | |
346 | if (recid > first_rec) | |
347 | ccw[-1].flags |= CCW_FLAG_DC; | |
348 | else | |
349 | ccw[-1].flags |= CCW_FLAG_CC; | |
350 | } | |
351 | ccw->cmd_code = cmd; | |
8e09f215 | 352 | ccw->count = block->bp_block; |
1da177e4 LT |
353 | if (idal_is_needed(dst, blksize)) { |
354 | ccw->cda = (__u32)(addr_t) idaws; | |
355 | ccw->flags = CCW_FLAG_IDA; | |
356 | idaws = idal_create_words(idaws, dst, blksize); | |
357 | } else { | |
358 | ccw->cda = (__u32)(addr_t) dst; | |
359 | ccw->flags = 0; | |
360 | } | |
361 | ccw++; | |
362 | dst += blksize; | |
363 | recid++; | |
364 | } | |
365 | } | |
13de227b HS |
366 | if (blk_noretry_request(req) || |
367 | block->base->features & DASD_FEATURE_FAILFAST) | |
1c01b8a5 | 368 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
8e09f215 SW |
369 | cqr->startdev = memdev; |
370 | cqr->memdev = memdev; | |
371 | cqr->block = block; | |
7c8faa86 | 372 | cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ |
1f1ee9ad | 373 | cqr->retries = memdev->default_retries; |
1aae0560 | 374 | cqr->buildclk = get_tod_clock(); |
1da177e4 LT |
375 | cqr->status = DASD_CQR_FILLED; |
376 | return cqr; | |
377 | } | |
378 | ||
379 | static int | |
380 | dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) | |
381 | { | |
382 | struct dasd_fba_private *private; | |
383 | struct ccw1 *ccw; | |
5705f702 | 384 | struct req_iterator iter; |
7988613b | 385 | struct bio_vec bv; |
1da177e4 LT |
386 | char *dst, *cda; |
387 | unsigned int blksize, off; | |
5705f702 | 388 | int status; |
1da177e4 LT |
389 | |
390 | if (!dasd_page_cache) | |
391 | goto out; | |
8e09f215 SW |
392 | private = (struct dasd_fba_private *) cqr->block->base->private; |
393 | blksize = cqr->block->bp_block; | |
1da177e4 LT |
394 | ccw = cqr->cpaddr; |
395 | /* Skip over define extent & locate record. */ | |
396 | ccw++; | |
397 | if (private->rdc_data.mode.bits.data_chain != 0) | |
398 | ccw++; | |
5705f702 | 399 | rq_for_each_segment(bv, req, iter) { |
7988613b KO |
400 | dst = page_address(bv.bv_page) + bv.bv_offset; |
401 | for (off = 0; off < bv.bv_len; off += blksize) { | |
1da177e4 LT |
402 | /* Skip locate record. */ |
403 | if (private->rdc_data.mode.bits.data_chain == 0) | |
404 | ccw++; | |
405 | if (dst) { | |
406 | if (ccw->flags & CCW_FLAG_IDA) | |
407 | cda = *((char **)((addr_t) ccw->cda)); | |
408 | else | |
409 | cda = (char *)((addr_t) ccw->cda); | |
410 | if (dst != cda) { | |
411 | if (rq_data_dir(req) == READ) | |
7988613b | 412 | memcpy(dst, cda, bv.bv_len); |
1da177e4 LT |
413 | kmem_cache_free(dasd_page_cache, |
414 | (void *)((addr_t)cda & PAGE_MASK)); | |
415 | } | |
416 | dst = NULL; | |
417 | } | |
418 | ccw++; | |
419 | } | |
420 | } | |
421 | out: | |
422 | status = cqr->status == DASD_CQR_DONE; | |
8e09f215 | 423 | dasd_sfree_request(cqr, cqr->memdev); |
1da177e4 LT |
424 | return status; |
425 | } | |
426 | ||
8e09f215 SW |
427 | static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr) |
428 | { | |
a2ace466 HR |
429 | if (cqr->retries < 0) |
430 | cqr->status = DASD_CQR_FAILED; | |
431 | else | |
432 | cqr->status = DASD_CQR_FILLED; | |
8e09f215 SW |
433 | }; |
434 | ||
1da177e4 LT |
435 | static int |
436 | dasd_fba_fill_info(struct dasd_device * device, | |
437 | struct dasd_information2_t * info) | |
438 | { | |
439 | info->label_block = 1; | |
440 | info->FBA_layout = 1; | |
441 | info->format = DASD_FORMAT_LDL; | |
442 | info->characteristics_size = sizeof(struct dasd_fba_characteristics); | |
443 | memcpy(info->characteristics, | |
444 | &((struct dasd_fba_private *) device->private)->rdc_data, | |
445 | sizeof (struct dasd_fba_characteristics)); | |
446 | info->confdata_size = 0; | |
447 | return 0; | |
448 | } | |
449 | ||
fc19f381 | 450 | static void |
aeec92ca SH |
451 | dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
452 | char *reason) | |
fc19f381 | 453 | { |
aeec92ca SH |
454 | u64 *sense; |
455 | ||
456 | sense = (u64 *) dasd_get_sense(irb); | |
457 | if (sense) { | |
458 | DBF_DEV_EVENT(DBF_EMERG, device, | |
459 | "%s: %s %02x%02x%02x %016llx %016llx %016llx " | |
460 | "%016llx", reason, | |
461 | scsw_is_tm(&irb->scsw) ? "t" : "c", | |
462 | scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), | |
463 | scsw_dstat(&irb->scsw), sense[0], sense[1], | |
464 | sense[2], sense[3]); | |
fc19f381 SH |
465 | } else { |
466 | DBF_DEV_EVENT(DBF_EMERG, device, "%s", | |
467 | "SORRY - NO VALID SENSE AVAILABLE\n"); | |
468 | } | |
469 | } | |
470 | ||
471 | ||
1da177e4 LT |
472 | static void |
473 | dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, | |
474 | struct irb *irb) | |
475 | { | |
476 | char *page; | |
477 | struct ccw1 *act, *end, *last; | |
478 | int len, sl, sct, count; | |
479 | ||
480 | page = (char *) get_zeroed_page(GFP_ATOMIC); | |
481 | if (page == NULL) { | |
fc19f381 | 482 | DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
1da177e4 LT |
483 | "No memory to dump sense data"); |
484 | return; | |
485 | } | |
773bab4a | 486 | len = sprintf(page, PRINTK_HEADER |
1da177e4 | 487 | " I/O status report for device %s:\n", |
2a0217d5 | 488 | dev_name(&device->cdev->dev)); |
773bab4a | 489 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 490 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, |
23d805b6 | 491 | irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); |
773bab4a | 492 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 | 493 | " device %s: Failing CCW: %p\n", |
2a0217d5 | 494 | dev_name(&device->cdev->dev), |
23d805b6 | 495 | (void *) (addr_t) irb->scsw.cmd.cpa); |
1da177e4 LT |
496 | if (irb->esw.esw0.erw.cons) { |
497 | for (sl = 0; sl < 4; sl++) { | |
773bab4a | 498 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
499 | " Sense(hex) %2d-%2d:", |
500 | (8 * sl), ((8 * sl) + 7)); | |
501 | ||
502 | for (sct = 0; sct < 8; sct++) { | |
503 | len += sprintf(page + len, " %02x", | |
504 | irb->ecw[8 * sl + sct]); | |
505 | } | |
506 | len += sprintf(page + len, "\n"); | |
507 | } | |
508 | } else { | |
773bab4a | 509 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
510 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
511 | } | |
fc19f381 | 512 | printk(KERN_ERR "%s", page); |
1da177e4 LT |
513 | |
514 | /* dump the Channel Program */ | |
515 | /* print first CCWs (maximum 8) */ | |
516 | act = req->cpaddr; | |
517 | for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); | |
518 | end = min(act + 8, last); | |
773bab4a | 519 | len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req); |
1da177e4 | 520 | while (act <= end) { |
773bab4a | 521 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
522 | " CCW %p: %08X %08X DAT:", |
523 | act, ((int *) act)[0], ((int *) act)[1]); | |
524 | for (count = 0; count < 32 && count < act->count; | |
525 | count += sizeof(int)) | |
526 | len += sprintf(page + len, " %08X", | |
527 | ((int *) (addr_t) act->cda) | |
528 | [(count>>2)]); | |
529 | len += sprintf(page + len, "\n"); | |
530 | act++; | |
531 | } | |
fc19f381 | 532 | printk(KERN_ERR "%s", page); |
1da177e4 LT |
533 | |
534 | ||
535 | /* print failing CCW area */ | |
536 | len = 0; | |
23d805b6 PO |
537 | if (act < ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) { |
538 | act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2; | |
773bab4a | 539 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
1da177e4 | 540 | } |
23d805b6 | 541 | end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last); |
1da177e4 | 542 | while (act <= end) { |
773bab4a | 543 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
544 | " CCW %p: %08X %08X DAT:", |
545 | act, ((int *) act)[0], ((int *) act)[1]); | |
546 | for (count = 0; count < 32 && count < act->count; | |
547 | count += sizeof(int)) | |
548 | len += sprintf(page + len, " %08X", | |
549 | ((int *) (addr_t) act->cda) | |
550 | [(count>>2)]); | |
551 | len += sprintf(page + len, "\n"); | |
552 | act++; | |
553 | } | |
554 | ||
555 | /* print last CCWs */ | |
556 | if (act < last - 2) { | |
557 | act = last - 2; | |
773bab4a | 558 | len += sprintf(page + len, PRINTK_HEADER "......\n"); |
1da177e4 LT |
559 | } |
560 | while (act <= last) { | |
773bab4a | 561 | len += sprintf(page + len, PRINTK_HEADER |
1da177e4 LT |
562 | " CCW %p: %08X %08X DAT:", |
563 | act, ((int *) act)[0], ((int *) act)[1]); | |
564 | for (count = 0; count < 32 && count < act->count; | |
565 | count += sizeof(int)) | |
566 | len += sprintf(page + len, " %08X", | |
567 | ((int *) (addr_t) act->cda) | |
568 | [(count>>2)]); | |
569 | len += sprintf(page + len, "\n"); | |
570 | act++; | |
571 | } | |
572 | if (len > 0) | |
fc19f381 | 573 | printk(KERN_ERR "%s", page); |
1da177e4 LT |
574 | free_page((unsigned long) page); |
575 | } | |
576 | ||
577 | /* | |
578 | * max_blocks is dependent on the amount of storage that is available | |
579 | * in the static io buffer for each device. Currently each device has | |
580 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has | |
581 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use | |
582 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In | |
138c014d | 583 | * addition we have one define extent ccw + 16 bytes of data and a |
1da177e4 LT |
584 | * locate record ccw for each block (stupid devices!) + 16 bytes of data. |
585 | * That makes: | |
586 | * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum. | |
587 | * We want to fit two into the available memory so that we can immediately | |
588 | * start the next request if one finishes off. That makes 100.1 blocks | |
589 | * for one request. Give a little safety and the result is 96. | |
590 | */ | |
591 | static struct dasd_discipline dasd_fba_discipline = { | |
592 | .owner = THIS_MODULE, | |
593 | .name = "FBA ", | |
594 | .ebcname = "FBA ", | |
595 | .max_blocks = 96, | |
596 | .check_device = dasd_fba_check_characteristics, | |
597 | .do_analysis = dasd_fba_do_analysis, | |
a4d26c6a | 598 | .verify_path = dasd_generic_verify_path, |
1da177e4 LT |
599 | .fill_geometry = dasd_fba_fill_geometry, |
600 | .start_IO = dasd_start_IO, | |
601 | .term_IO = dasd_term_IO, | |
8e09f215 | 602 | .handle_terminated_request = dasd_fba_handle_terminated_request, |
1da177e4 LT |
603 | .erp_action = dasd_fba_erp_action, |
604 | .erp_postaction = dasd_fba_erp_postaction, | |
5a27e60d | 605 | .check_for_device_change = dasd_fba_check_for_device_change, |
1da177e4 LT |
606 | .build_cp = dasd_fba_build_cp, |
607 | .free_cp = dasd_fba_free_cp, | |
608 | .dump_sense = dasd_fba_dump_sense, | |
fc19f381 | 609 | .dump_sense_dbf = dasd_fba_dump_sense_dbf, |
1da177e4 LT |
610 | .fill_info = dasd_fba_fill_info, |
611 | }; | |
612 | ||
613 | static int __init | |
614 | dasd_fba_init(void) | |
615 | { | |
736e6ea0 SO |
616 | int ret; |
617 | ||
1da177e4 | 618 | ASCEBC(dasd_fba_discipline.ebcname, 4); |
736e6ea0 SO |
619 | ret = ccw_driver_register(&dasd_fba_driver); |
620 | if (!ret) | |
621 | wait_for_device_probe(); | |
622 | ||
623 | return ret; | |
1da177e4 LT |
624 | } |
625 | ||
626 | static void __exit | |
627 | dasd_fba_cleanup(void) | |
628 | { | |
629 | ccw_driver_unregister(&dasd_fba_driver); | |
630 | } | |
631 | ||
632 | module_init(dasd_fba_init); | |
633 | module_exit(dasd_fba_cleanup); |