Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * File...........: linux/drivers/s390/block/dasd_eckd.c |
| 3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 4 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Carsten Otte <Cotte@de.ibm.com> |
| 6 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
| 7 | * Bugreports.to..: <Linux390@de.ibm.com> |
| 8 | * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 |
| 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/stddef.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/hdreg.h> /* HDIO_GETGEO */ |
| 17 | #include <linux/bio.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
| 20 | |
| 21 | #include <asm/debug.h> |
| 22 | #include <asm/idals.h> |
| 23 | #include <asm/ebcdic.h> |
| 24 | #include <asm/io.h> |
| 25 | #include <asm/todclk.h> |
| 26 | #include <asm/uaccess.h> |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 27 | #include <asm/cio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/ccwdev.h> |
| 29 | |
| 30 | #include "dasd_int.h" |
| 31 | #include "dasd_eckd.h" |
| 32 | |
| 33 | #ifdef PRINTK_HEADER |
| 34 | #undef PRINTK_HEADER |
| 35 | #endif /* PRINTK_HEADER */ |
| 36 | #define PRINTK_HEADER "dasd(eckd):" |
| 37 | |
| 38 | #define ECKD_C0(i) (i->home_bytes) |
| 39 | #define ECKD_F(i) (i->formula) |
| 40 | #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ |
| 41 | (i->factors.f_0x02.f1)) |
| 42 | #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ |
| 43 | (i->factors.f_0x02.f2)) |
| 44 | #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ |
| 45 | (i->factors.f_0x02.f3)) |
| 46 | #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) |
| 47 | #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) |
| 48 | #define ECKD_F6(i) (i->factor6) |
| 49 | #define ECKD_F7(i) (i->factor7) |
| 50 | #define ECKD_F8(i) (i->factor8) |
| 51 | |
| 52 | MODULE_LICENSE("GPL"); |
| 53 | |
| 54 | static struct dasd_discipline dasd_eckd_discipline; |
| 55 | |
| 56 | struct dasd_eckd_private { |
| 57 | struct dasd_eckd_characteristics rdc_data; |
| 58 | struct dasd_eckd_confdata conf_data; |
| 59 | struct dasd_eckd_path path_data; |
| 60 | struct eckd_count count_area[5]; |
| 61 | int init_cqr_status; |
| 62 | int uses_cdl; |
| 63 | struct attrib_data_t attrib; /* e.g. cache operations */ |
| 64 | }; |
| 65 | |
| 66 | /* The ccw bus type uses this table to find devices that it sends to |
| 67 | * dasd_eckd_probe */ |
| 68 | static struct ccw_device_id dasd_eckd_ids[] = { |
| 69 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), driver_info: 0x1}, |
| 70 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), driver_info: 0x2}, |
| 71 | { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), driver_info: 0x3}, |
| 72 | { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), driver_info: 0x4}, |
| 73 | { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), driver_info: 0x5}, |
| 74 | { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), driver_info: 0x6}, |
| 75 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), driver_info: 0x7}, |
| 76 | { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), driver_info: 0x8}, |
| 77 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), driver_info: 0x9}, |
| 78 | { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), driver_info: 0xa}, |
| 79 | { /* end of list */ }, |
| 80 | }; |
| 81 | |
| 82 | MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); |
| 83 | |
| 84 | static struct ccw_driver dasd_eckd_driver; /* see below */ |
| 85 | |
| 86 | /* initial attempt at a probe function. this can be simplified once |
| 87 | * the other detection code is gone */ |
| 88 | static int |
| 89 | dasd_eckd_probe (struct ccw_device *cdev) |
| 90 | { |
| 91 | int ret; |
| 92 | |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 93 | /* set ECKD specific ccw-device options */ |
| 94 | ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); |
| 95 | if (ret) { |
| 96 | printk(KERN_WARNING |
| 97 | "dasd_eckd_probe: could not set ccw-device options " |
| 98 | "for %s\n", cdev->dev.bus_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | return ret; |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 100 | } |
| 101 | ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); |
| 102 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | static int |
| 106 | dasd_eckd_set_online(struct ccw_device *cdev) |
| 107 | { |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 108 | return dasd_generic_set_online(cdev, &dasd_eckd_discipline); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | static struct ccw_driver dasd_eckd_driver = { |
| 112 | .name = "dasd-eckd", |
| 113 | .owner = THIS_MODULE, |
| 114 | .ids = dasd_eckd_ids, |
| 115 | .probe = dasd_eckd_probe, |
| 116 | .remove = dasd_generic_remove, |
| 117 | .set_offline = dasd_generic_set_offline, |
| 118 | .set_online = dasd_eckd_set_online, |
| 119 | .notify = dasd_generic_notify, |
| 120 | }; |
| 121 | |
| 122 | static const int sizes_trk0[] = { 28, 148, 84 }; |
| 123 | #define LABEL_SIZE 140 |
| 124 | |
| 125 | static inline unsigned int |
| 126 | round_up_multiple(unsigned int no, unsigned int mult) |
| 127 | { |
| 128 | int rem = no % mult; |
| 129 | return (rem ? no - rem + mult : no); |
| 130 | } |
| 131 | |
| 132 | static inline unsigned int |
| 133 | ceil_quot(unsigned int d1, unsigned int d2) |
| 134 | { |
| 135 | return (d1 + (d2 - 1)) / d2; |
| 136 | } |
| 137 | |
| 138 | static inline int |
| 139 | bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) |
| 140 | { |
| 141 | unsigned int fl1, fl2, int1, int2; |
| 142 | int bpr; |
| 143 | |
| 144 | switch (rdc->formula) { |
| 145 | case 0x01: |
| 146 | fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); |
| 147 | fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, |
| 148 | ECKD_F1(rdc)); |
| 149 | bpr = fl1 + fl2; |
| 150 | break; |
| 151 | case 0x02: |
| 152 | int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); |
| 153 | int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); |
| 154 | fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + |
| 155 | ECKD_F6(rdc) + ECKD_F4(rdc) * int1, |
| 156 | ECKD_F1(rdc)); |
| 157 | fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + |
| 158 | ECKD_F6(rdc) + ECKD_F4(rdc) * int2, |
| 159 | ECKD_F1(rdc)); |
| 160 | bpr = fl1 + fl2; |
| 161 | break; |
| 162 | default: |
| 163 | bpr = 0; |
| 164 | break; |
| 165 | } |
| 166 | return bpr; |
| 167 | } |
| 168 | |
| 169 | static inline unsigned int |
| 170 | bytes_per_track(struct dasd_eckd_characteristics *rdc) |
| 171 | { |
| 172 | return *(unsigned int *) (rdc->byte_per_track) >> 8; |
| 173 | } |
| 174 | |
| 175 | static inline unsigned int |
| 176 | recs_per_track(struct dasd_eckd_characteristics * rdc, |
| 177 | unsigned int kl, unsigned int dl) |
| 178 | { |
| 179 | int dn, kn; |
| 180 | |
| 181 | switch (rdc->dev_type) { |
| 182 | case 0x3380: |
| 183 | if (kl) |
| 184 | return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + |
| 185 | ceil_quot(dl + 12, 32)); |
| 186 | else |
| 187 | return 1499 / (15 + ceil_quot(dl + 12, 32)); |
| 188 | case 0x3390: |
| 189 | dn = ceil_quot(dl + 6, 232) + 1; |
| 190 | if (kl) { |
| 191 | kn = ceil_quot(kl + 6, 232) + 1; |
| 192 | return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + |
| 193 | 9 + ceil_quot(dl + 6 * dn, 34)); |
| 194 | } else |
| 195 | return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); |
| 196 | case 0x9345: |
| 197 | dn = ceil_quot(dl + 6, 232) + 1; |
| 198 | if (kl) { |
| 199 | kn = ceil_quot(kl + 6, 232) + 1; |
| 200 | return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + |
| 201 | ceil_quot(dl + 6 * dn, 34)); |
| 202 | } else |
| 203 | return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); |
| 204 | } |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | static inline void |
| 209 | check_XRC (struct ccw1 *de_ccw, |
| 210 | struct DE_eckd_data *data, |
| 211 | struct dasd_device *device) |
| 212 | { |
| 213 | struct dasd_eckd_private *private; |
| 214 | |
| 215 | private = (struct dasd_eckd_private *) device->private; |
| 216 | |
| 217 | /* switch on System Time Stamp - needed for XRC Support */ |
| 218 | if (private->rdc_data.facilities.XRC_supported) { |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
| 221 | data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | data->ep_sys_time = get_clock (); |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | de_ccw->count = sizeof (struct DE_eckd_data); |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 226 | de_ccw->flags |= CCW_FLAG_SLI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | return; |
| 230 | |
| 231 | } /* end check_XRC */ |
| 232 | |
| 233 | static inline void |
| 234 | define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, |
| 235 | int totrk, int cmd, struct dasd_device * device) |
| 236 | { |
| 237 | struct dasd_eckd_private *private; |
| 238 | struct ch_t geo, beg, end; |
| 239 | |
| 240 | private = (struct dasd_eckd_private *) device->private; |
| 241 | |
| 242 | ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; |
| 243 | ccw->flags = 0; |
| 244 | ccw->count = 16; |
| 245 | ccw->cda = (__u32) __pa(data); |
| 246 | |
| 247 | memset(data, 0, sizeof (struct DE_eckd_data)); |
| 248 | switch (cmd) { |
| 249 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: |
| 250 | case DASD_ECKD_CCW_READ_RECORD_ZERO: |
| 251 | case DASD_ECKD_CCW_READ: |
| 252 | case DASD_ECKD_CCW_READ_MT: |
| 253 | case DASD_ECKD_CCW_READ_CKD: |
| 254 | case DASD_ECKD_CCW_READ_CKD_MT: |
| 255 | case DASD_ECKD_CCW_READ_KD: |
| 256 | case DASD_ECKD_CCW_READ_KD_MT: |
| 257 | case DASD_ECKD_CCW_READ_COUNT: |
| 258 | data->mask.perm = 0x1; |
| 259 | data->attributes.operation = private->attrib.operation; |
| 260 | break; |
| 261 | case DASD_ECKD_CCW_WRITE: |
| 262 | case DASD_ECKD_CCW_WRITE_MT: |
| 263 | case DASD_ECKD_CCW_WRITE_KD: |
| 264 | case DASD_ECKD_CCW_WRITE_KD_MT: |
| 265 | data->mask.perm = 0x02; |
| 266 | data->attributes.operation = private->attrib.operation; |
| 267 | check_XRC (ccw, data, device); |
| 268 | break; |
| 269 | case DASD_ECKD_CCW_WRITE_CKD: |
| 270 | case DASD_ECKD_CCW_WRITE_CKD_MT: |
| 271 | data->attributes.operation = DASD_BYPASS_CACHE; |
| 272 | check_XRC (ccw, data, device); |
| 273 | break; |
| 274 | case DASD_ECKD_CCW_ERASE: |
| 275 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: |
| 276 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: |
| 277 | data->mask.perm = 0x3; |
| 278 | data->mask.auth = 0x1; |
| 279 | data->attributes.operation = DASD_BYPASS_CACHE; |
| 280 | check_XRC (ccw, data, device); |
| 281 | break; |
| 282 | default: |
| 283 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); |
| 284 | break; |
| 285 | } |
| 286 | |
| 287 | data->attributes.mode = 0x3; /* ECKD */ |
| 288 | |
| 289 | if ((private->rdc_data.cu_type == 0x2105 || |
| 290 | private->rdc_data.cu_type == 0x2107 || |
| 291 | private->rdc_data.cu_type == 0x1750) |
| 292 | && !(private->uses_cdl && trk < 2)) |
| 293 | data->ga_extended |= 0x40; /* Regular Data Format Mode */ |
| 294 | |
| 295 | geo.cyl = private->rdc_data.no_cyl; |
| 296 | geo.head = private->rdc_data.trk_per_cyl; |
| 297 | beg.cyl = trk / geo.head; |
| 298 | beg.head = trk % geo.head; |
| 299 | end.cyl = totrk / geo.head; |
| 300 | end.head = totrk % geo.head; |
| 301 | |
| 302 | /* check for sequential prestage - enhance cylinder range */ |
| 303 | if (data->attributes.operation == DASD_SEQ_PRESTAGE || |
| 304 | data->attributes.operation == DASD_SEQ_ACCESS) { |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 305 | |
| 306 | if (end.cyl + private->attrib.nr_cyl < geo.cyl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | end.cyl += private->attrib.nr_cyl; |
| 308 | else |
| 309 | end.cyl = (geo.cyl - 1); |
| 310 | } |
| 311 | |
| 312 | data->beg_ext.cyl = beg.cyl; |
| 313 | data->beg_ext.head = beg.head; |
| 314 | data->end_ext.cyl = end.cyl; |
| 315 | data->end_ext.head = end.head; |
| 316 | } |
| 317 | |
| 318 | static inline void |
| 319 | locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, |
| 320 | int rec_on_trk, int no_rec, int cmd, |
| 321 | struct dasd_device * device, int reclen) |
| 322 | { |
| 323 | struct dasd_eckd_private *private; |
| 324 | int sector; |
| 325 | int dn, d; |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | private = (struct dasd_eckd_private *) device->private; |
| 328 | |
| 329 | DBF_DEV_EVENT(DBF_INFO, device, |
| 330 | "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", |
| 331 | trk, rec_on_trk, no_rec, cmd, reclen); |
| 332 | |
| 333 | ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; |
| 334 | ccw->flags = 0; |
| 335 | ccw->count = 16; |
| 336 | ccw->cda = (__u32) __pa(data); |
| 337 | |
| 338 | memset(data, 0, sizeof (struct LO_eckd_data)); |
| 339 | sector = 0; |
| 340 | if (rec_on_trk) { |
| 341 | switch (private->rdc_data.dev_type) { |
| 342 | case 0x3390: |
| 343 | dn = ceil_quot(reclen + 6, 232); |
| 344 | d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); |
| 345 | sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; |
| 346 | break; |
| 347 | case 0x3380: |
| 348 | d = 7 + ceil_quot(reclen + 12, 32); |
| 349 | sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; |
| 350 | break; |
| 351 | } |
| 352 | } |
| 353 | data->sector = sector; |
| 354 | data->count = no_rec; |
| 355 | switch (cmd) { |
| 356 | case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: |
| 357 | data->operation.orientation = 0x3; |
| 358 | data->operation.operation = 0x03; |
| 359 | break; |
| 360 | case DASD_ECKD_CCW_READ_HOME_ADDRESS: |
| 361 | data->operation.orientation = 0x3; |
| 362 | data->operation.operation = 0x16; |
| 363 | break; |
| 364 | case DASD_ECKD_CCW_WRITE_RECORD_ZERO: |
| 365 | data->operation.orientation = 0x1; |
| 366 | data->operation.operation = 0x03; |
| 367 | data->count++; |
| 368 | break; |
| 369 | case DASD_ECKD_CCW_READ_RECORD_ZERO: |
| 370 | data->operation.orientation = 0x3; |
| 371 | data->operation.operation = 0x16; |
| 372 | data->count++; |
| 373 | break; |
| 374 | case DASD_ECKD_CCW_WRITE: |
| 375 | case DASD_ECKD_CCW_WRITE_MT: |
| 376 | case DASD_ECKD_CCW_WRITE_KD: |
| 377 | case DASD_ECKD_CCW_WRITE_KD_MT: |
| 378 | data->auxiliary.last_bytes_used = 0x1; |
| 379 | data->length = reclen; |
| 380 | data->operation.operation = 0x01; |
| 381 | break; |
| 382 | case DASD_ECKD_CCW_WRITE_CKD: |
| 383 | case DASD_ECKD_CCW_WRITE_CKD_MT: |
| 384 | data->auxiliary.last_bytes_used = 0x1; |
| 385 | data->length = reclen; |
| 386 | data->operation.operation = 0x03; |
| 387 | break; |
| 388 | case DASD_ECKD_CCW_READ: |
| 389 | case DASD_ECKD_CCW_READ_MT: |
| 390 | case DASD_ECKD_CCW_READ_KD: |
| 391 | case DASD_ECKD_CCW_READ_KD_MT: |
| 392 | data->auxiliary.last_bytes_used = 0x1; |
| 393 | data->length = reclen; |
| 394 | data->operation.operation = 0x06; |
| 395 | break; |
| 396 | case DASD_ECKD_CCW_READ_CKD: |
| 397 | case DASD_ECKD_CCW_READ_CKD_MT: |
| 398 | data->auxiliary.last_bytes_used = 0x1; |
| 399 | data->length = reclen; |
| 400 | data->operation.operation = 0x16; |
| 401 | break; |
| 402 | case DASD_ECKD_CCW_READ_COUNT: |
| 403 | data->operation.operation = 0x06; |
| 404 | break; |
| 405 | case DASD_ECKD_CCW_ERASE: |
| 406 | data->length = reclen; |
| 407 | data->auxiliary.last_bytes_used = 0x1; |
| 408 | data->operation.operation = 0x0b; |
| 409 | break; |
| 410 | default: |
| 411 | DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); |
| 412 | } |
| 413 | data->seek_addr.cyl = data->search_arg.cyl = |
| 414 | trk / private->rdc_data.trk_per_cyl; |
| 415 | data->seek_addr.head = data->search_arg.head = |
| 416 | trk % private->rdc_data.trk_per_cyl; |
| 417 | data->search_arg.record = rec_on_trk; |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * Returns 1 if the block is one of the special blocks that needs |
| 422 | * to get read/written with the KD variant of the command. |
| 423 | * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and |
| 424 | * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. |
| 425 | * Luckily the KD variants differ only by one bit (0x08) from the |
| 426 | * normal variant. So don't wonder about code like: |
| 427 | * if (dasd_eckd_cdl_special(blk_per_trk, recid)) |
| 428 | * ccw->cmd_code |= 0x8; |
| 429 | */ |
| 430 | static inline int |
| 431 | dasd_eckd_cdl_special(int blk_per_trk, int recid) |
| 432 | { |
| 433 | if (recid < 3) |
| 434 | return 1; |
| 435 | if (recid < blk_per_trk) |
| 436 | return 0; |
| 437 | if (recid < 2 * blk_per_trk) |
| 438 | return 1; |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | /* |
| 443 | * Returns the record size for the special blocks of the cdl format. |
| 444 | * Only returns something useful if dasd_eckd_cdl_special is true |
| 445 | * for the recid. |
| 446 | */ |
| 447 | static inline int |
| 448 | dasd_eckd_cdl_reclen(int recid) |
| 449 | { |
| 450 | if (recid < 3) |
| 451 | return sizes_trk0[recid]; |
| 452 | return LABEL_SIZE; |
| 453 | } |
| 454 | |
Horst Hummel | 3d05259 | 2006-04-27 18:40:28 -0700 | [diff] [blame] | 455 | /* |
| 456 | * Generate device unique id that specifies the physical device. |
| 457 | */ |
| 458 | static int |
| 459 | dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) |
| 460 | { |
| 461 | struct dasd_eckd_private *private; |
| 462 | struct dasd_eckd_confdata *confdata; |
| 463 | |
| 464 | private = (struct dasd_eckd_private *) device->private; |
| 465 | if (!private) |
| 466 | return -ENODEV; |
| 467 | confdata = &private->conf_data; |
| 468 | if (!confdata) |
| 469 | return -ENODEV; |
| 470 | |
| 471 | memset(uid, 0, sizeof(struct dasd_uid)); |
| 472 | strncpy(uid->vendor, confdata->ned1.HDA_manufacturer, |
| 473 | sizeof(uid->vendor) - 1); |
| 474 | EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
| 475 | strncpy(uid->serial, confdata->ned1.HDA_location, |
| 476 | sizeof(uid->serial) - 1); |
| 477 | EBCASC(uid->serial, sizeof(uid->serial) - 1); |
| 478 | uid->ssid = confdata->neq.subsystemID; |
| 479 | if (confdata->ned2.sneq.flags == 0x40) { |
| 480 | uid->alias = 1; |
| 481 | uid->unit_addr = confdata->ned2.sneq.base_unit_addr; |
| 482 | } else |
| 483 | uid->unit_addr = confdata->ned1.unit_addr; |
| 484 | |
| 485 | return 0; |
| 486 | } |
| 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | static int |
| 489 | dasd_eckd_read_conf(struct dasd_device *device) |
| 490 | { |
| 491 | void *conf_data; |
| 492 | int conf_len, conf_data_saved; |
| 493 | int rc; |
| 494 | __u8 lpm; |
| 495 | struct dasd_eckd_private *private; |
| 496 | struct dasd_eckd_path *path_data; |
| 497 | |
| 498 | private = (struct dasd_eckd_private *) device->private; |
| 499 | path_data = (struct dasd_eckd_path *) &private->path_data; |
| 500 | path_data->opm = ccw_device_get_path_mask(device->cdev); |
| 501 | lpm = 0x80; |
| 502 | conf_data_saved = 0; |
| 503 | |
| 504 | /* get configuration data per operational path */ |
| 505 | for (lpm = 0x80; lpm; lpm>>= 1) { |
| 506 | if (lpm & path_data->opm){ |
| 507 | rc = read_conf_data_lpm(device->cdev, &conf_data, |
| 508 | &conf_len, lpm); |
| 509 | if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ |
| 510 | MESSAGE(KERN_WARNING, |
| 511 | "Read configuration data returned " |
| 512 | "error %d", rc); |
| 513 | return rc; |
| 514 | } |
| 515 | if (conf_data == NULL) { |
| 516 | MESSAGE(KERN_WARNING, "%s", "No configuration " |
| 517 | "data retrieved"); |
| 518 | continue; /* no errror */ |
| 519 | } |
| 520 | if (conf_len != sizeof (struct dasd_eckd_confdata)) { |
| 521 | MESSAGE(KERN_WARNING, |
| 522 | "sizes of configuration data mismatch" |
| 523 | "%d (read) vs %ld (expected)", |
| 524 | conf_len, |
| 525 | sizeof (struct dasd_eckd_confdata)); |
| 526 | kfree(conf_data); |
| 527 | continue; /* no errror */ |
| 528 | } |
| 529 | /* save first valid configuration data */ |
| 530 | if (!conf_data_saved){ |
| 531 | memcpy(&private->conf_data, conf_data, |
| 532 | sizeof (struct dasd_eckd_confdata)); |
| 533 | conf_data_saved++; |
| 534 | } |
| 535 | switch (((char *)conf_data)[242] & 0x07){ |
| 536 | case 0x02: |
| 537 | path_data->npm |= lpm; |
| 538 | break; |
| 539 | case 0x03: |
| 540 | path_data->ppm |= lpm; |
| 541 | break; |
| 542 | } |
| 543 | kfree(conf_data); |
| 544 | } |
| 545 | } |
| 546 | return 0; |
| 547 | } |
| 548 | |
Horst Hummel | 3d05259 | 2006-04-27 18:40:28 -0700 | [diff] [blame] | 549 | /* |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 550 | * Build CP for Perform Subsystem Function - SSC. |
| 551 | */ |
| 552 | struct dasd_ccw_req * |
| 553 | dasd_eckd_build_psf_ssc(struct dasd_device *device) |
| 554 | { |
| 555 | struct dasd_ccw_req *cqr; |
| 556 | struct dasd_psf_ssc_data *psf_ssc_data; |
| 557 | struct ccw1 *ccw; |
| 558 | |
| 559 | cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , |
| 560 | sizeof(struct dasd_psf_ssc_data), |
| 561 | device); |
| 562 | |
| 563 | if (IS_ERR(cqr)) { |
| 564 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 565 | "Could not allocate PSF-SSC request"); |
| 566 | return cqr; |
| 567 | } |
| 568 | psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; |
| 569 | psf_ssc_data->order = PSF_ORDER_SSC; |
| 570 | psf_ssc_data->suborder = 0x08; |
| 571 | |
| 572 | ccw = cqr->cpaddr; |
| 573 | ccw->cmd_code = DASD_ECKD_CCW_PSF; |
| 574 | ccw->cda = (__u32)(addr_t)psf_ssc_data; |
| 575 | ccw->count = 66; |
| 576 | |
| 577 | cqr->device = device; |
| 578 | cqr->expires = 10*HZ; |
| 579 | cqr->buildclk = get_clock(); |
| 580 | cqr->status = DASD_CQR_FILLED; |
| 581 | return cqr; |
| 582 | } |
| 583 | |
| 584 | /* |
| 585 | * Perform Subsystem Function. |
| 586 | * It is necessary to trigger CIO for channel revalidation since this |
| 587 | * call might change behaviour of DASD devices. |
| 588 | */ |
| 589 | static int |
| 590 | dasd_eckd_psf_ssc(struct dasd_device *device) |
| 591 | { |
| 592 | struct dasd_ccw_req *cqr; |
| 593 | int rc; |
| 594 | |
| 595 | cqr = dasd_eckd_build_psf_ssc(device); |
| 596 | if (IS_ERR(cqr)) |
| 597 | return PTR_ERR(cqr); |
| 598 | |
| 599 | rc = dasd_sleep_on(cqr); |
| 600 | if (!rc) |
| 601 | /* trigger CIO to reprobe devices */ |
| 602 | css_schedule_reprobe(); |
| 603 | dasd_sfree_request(cqr, cqr->device); |
| 604 | return rc; |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * Valide storage server of current device. |
| 609 | */ |
| 610 | static int |
| 611 | dasd_eckd_validate_server(struct dasd_device *device) |
| 612 | { |
| 613 | int rc; |
| 614 | |
| 615 | /* Currently PAV is the only reason to 'validate' server on LPAR */ |
| 616 | if (dasd_nopav || MACHINE_IS_VM) |
| 617 | return 0; |
| 618 | |
| 619 | rc = dasd_eckd_psf_ssc(device); |
| 620 | if (rc) |
| 621 | /* may be requested feature is not available on server, |
| 622 | * therefore just report error and go ahead */ |
| 623 | DEV_MESSAGE(KERN_INFO, device, |
| 624 | "Perform Subsystem Function returned rc=%d", rc); |
| 625 | /* RE-Read Configuration Data */ |
| 626 | return dasd_eckd_read_conf(device); |
| 627 | } |
| 628 | |
| 629 | /* |
Horst Hummel | 3d05259 | 2006-04-27 18:40:28 -0700 | [diff] [blame] | 630 | * Check device characteristics. |
| 631 | * If the device is accessible using ECKD discipline, the device is enabled. |
| 632 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | static int |
| 634 | dasd_eckd_check_characteristics(struct dasd_device *device) |
| 635 | { |
| 636 | struct dasd_eckd_private *private; |
Horst Hummel | 3d05259 | 2006-04-27 18:40:28 -0700 | [diff] [blame] | 637 | struct dasd_uid uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | void *rdc_data; |
| 639 | int rc; |
| 640 | |
| 641 | private = (struct dasd_eckd_private *) device->private; |
| 642 | if (private == NULL) { |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 643 | private = kzalloc(sizeof(struct dasd_eckd_private), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | GFP_KERNEL | GFP_DMA); |
| 645 | if (private == NULL) { |
| 646 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 647 | "memory allocation failed for private " |
| 648 | "data"); |
| 649 | return -ENOMEM; |
| 650 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | device->private = (void *) private; |
| 652 | } |
| 653 | /* Invalidate status of initial analysis. */ |
| 654 | private->init_cqr_status = -1; |
| 655 | /* Set default cache operations. */ |
| 656 | private->attrib.operation = DASD_NORMAL_CACHE; |
| 657 | private->attrib.nr_cyl = 0; |
| 658 | |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 659 | /* Read Configuration Data */ |
| 660 | rc = dasd_eckd_read_conf(device); |
| 661 | if (rc) |
| 662 | return rc; |
| 663 | |
| 664 | /* Generate device unique id and register in devmap */ |
| 665 | rc = dasd_eckd_generate_uid(device, &uid); |
| 666 | if (rc) |
| 667 | return rc; |
| 668 | rc = dasd_set_uid(device->cdev, &uid); |
| 669 | if (rc == 1) /* new server found */ |
| 670 | rc = dasd_eckd_validate_server(device); |
| 671 | if (rc) |
| 672 | return rc; |
| 673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | /* Read Device Characteristics */ |
| 675 | rdc_data = (void *) &(private->rdc_data); |
Horst Hummel | 3d05259 | 2006-04-27 18:40:28 -0700 | [diff] [blame] | 676 | memset(rdc_data, 0, sizeof(rdc_data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | rc = read_dev_chars(device->cdev, &rdc_data, 64); |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 678 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | DEV_MESSAGE(KERN_WARNING, device, |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 680 | "Read device characteristics returned " |
| 681 | "rc=%d", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
| 683 | DEV_MESSAGE(KERN_INFO, device, |
| 684 | "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", |
| 685 | private->rdc_data.dev_type, |
| 686 | private->rdc_data.dev_model, |
| 687 | private->rdc_data.cu_type, |
| 688 | private->rdc_data.cu_model.model, |
| 689 | private->rdc_data.no_cyl, |
| 690 | private->rdc_data.trk_per_cyl, |
| 691 | private->rdc_data.sec_per_trk); |
Horst Hummel | 3d05259 | 2006-04-27 18:40:28 -0700 | [diff] [blame] | 692 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | } |
| 694 | |
| 695 | static struct dasd_ccw_req * |
| 696 | dasd_eckd_analysis_ccw(struct dasd_device *device) |
| 697 | { |
| 698 | struct dasd_eckd_private *private; |
| 699 | struct eckd_count *count_data; |
| 700 | struct LO_eckd_data *LO_data; |
| 701 | struct dasd_ccw_req *cqr; |
| 702 | struct ccw1 *ccw; |
| 703 | int cplength, datasize; |
| 704 | int i; |
| 705 | |
| 706 | private = (struct dasd_eckd_private *) device->private; |
| 707 | |
| 708 | cplength = 8; |
| 709 | datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); |
| 710 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
| 711 | cplength, datasize, device); |
| 712 | if (IS_ERR(cqr)) |
| 713 | return cqr; |
| 714 | ccw = cqr->cpaddr; |
| 715 | /* Define extent for the first 3 tracks. */ |
| 716 | define_extent(ccw++, cqr->data, 0, 2, |
| 717 | DASD_ECKD_CCW_READ_COUNT, device); |
| 718 | LO_data = cqr->data + sizeof (struct DE_eckd_data); |
| 719 | /* Locate record for the first 4 records on track 0. */ |
| 720 | ccw[-1].flags |= CCW_FLAG_CC; |
| 721 | locate_record(ccw++, LO_data++, 0, 0, 4, |
| 722 | DASD_ECKD_CCW_READ_COUNT, device, 0); |
| 723 | |
| 724 | count_data = private->count_area; |
| 725 | for (i = 0; i < 4; i++) { |
| 726 | ccw[-1].flags |= CCW_FLAG_CC; |
| 727 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; |
| 728 | ccw->flags = 0; |
| 729 | ccw->count = 8; |
| 730 | ccw->cda = (__u32)(addr_t) count_data; |
| 731 | ccw++; |
| 732 | count_data++; |
| 733 | } |
| 734 | |
| 735 | /* Locate record for the first record on track 2. */ |
| 736 | ccw[-1].flags |= CCW_FLAG_CC; |
| 737 | locate_record(ccw++, LO_data++, 2, 0, 1, |
| 738 | DASD_ECKD_CCW_READ_COUNT, device, 0); |
| 739 | /* Read count ccw. */ |
| 740 | ccw[-1].flags |= CCW_FLAG_CC; |
| 741 | ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; |
| 742 | ccw->flags = 0; |
| 743 | ccw->count = 8; |
| 744 | ccw->cda = (__u32)(addr_t) count_data; |
| 745 | |
| 746 | cqr->device = device; |
| 747 | cqr->retries = 0; |
| 748 | cqr->buildclk = get_clock(); |
| 749 | cqr->status = DASD_CQR_FILLED; |
| 750 | return cqr; |
| 751 | } |
| 752 | |
| 753 | /* |
| 754 | * This is the callback function for the init_analysis cqr. It saves |
| 755 | * the status of the initial analysis ccw before it frees it and kicks |
| 756 | * the device to continue the startup sequence. This will call |
| 757 | * dasd_eckd_do_analysis again (if the devices has not been marked |
| 758 | * for deletion in the meantime). |
| 759 | */ |
| 760 | static void |
| 761 | dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) |
| 762 | { |
| 763 | struct dasd_eckd_private *private; |
| 764 | struct dasd_device *device; |
| 765 | |
| 766 | device = init_cqr->device; |
| 767 | private = (struct dasd_eckd_private *) device->private; |
| 768 | private->init_cqr_status = init_cqr->status; |
| 769 | dasd_sfree_request(init_cqr, device); |
| 770 | dasd_kick_device(device); |
| 771 | } |
| 772 | |
| 773 | static int |
| 774 | dasd_eckd_start_analysis(struct dasd_device *device) |
| 775 | { |
| 776 | struct dasd_eckd_private *private; |
| 777 | struct dasd_ccw_req *init_cqr; |
| 778 | |
| 779 | private = (struct dasd_eckd_private *) device->private; |
| 780 | init_cqr = dasd_eckd_analysis_ccw(device); |
| 781 | if (IS_ERR(init_cqr)) |
| 782 | return PTR_ERR(init_cqr); |
| 783 | init_cqr->callback = dasd_eckd_analysis_callback; |
| 784 | init_cqr->callback_data = NULL; |
| 785 | init_cqr->expires = 5*HZ; |
| 786 | dasd_add_request_head(init_cqr); |
| 787 | return -EAGAIN; |
| 788 | } |
| 789 | |
| 790 | static int |
| 791 | dasd_eckd_end_analysis(struct dasd_device *device) |
| 792 | { |
| 793 | struct dasd_eckd_private *private; |
| 794 | struct eckd_count *count_area; |
| 795 | unsigned int sb, blk_per_trk; |
| 796 | int status, i; |
| 797 | |
| 798 | private = (struct dasd_eckd_private *) device->private; |
| 799 | status = private->init_cqr_status; |
| 800 | private->init_cqr_status = -1; |
| 801 | if (status != DASD_CQR_DONE) { |
| 802 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 803 | "volume analysis returned unformatted disk"); |
| 804 | return -EMEDIUMTYPE; |
| 805 | } |
| 806 | |
| 807 | private->uses_cdl = 1; |
| 808 | /* Calculate number of blocks/records per track. */ |
| 809 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); |
| 810 | /* Check Track 0 for Compatible Disk Layout */ |
| 811 | count_area = NULL; |
| 812 | for (i = 0; i < 3; i++) { |
| 813 | if (private->count_area[i].kl != 4 || |
| 814 | private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { |
| 815 | private->uses_cdl = 0; |
| 816 | break; |
| 817 | } |
| 818 | } |
| 819 | if (i == 3) |
| 820 | count_area = &private->count_area[4]; |
| 821 | |
| 822 | if (private->uses_cdl == 0) { |
| 823 | for (i = 0; i < 5; i++) { |
| 824 | if ((private->count_area[i].kl != 0) || |
| 825 | (private->count_area[i].dl != |
| 826 | private->count_area[0].dl)) |
| 827 | break; |
| 828 | } |
| 829 | if (i == 5) |
| 830 | count_area = &private->count_area[0]; |
| 831 | } else { |
| 832 | if (private->count_area[3].record == 1) |
| 833 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 834 | "Trk 0: no records after VTOC!"); |
| 835 | } |
| 836 | if (count_area != NULL && count_area->kl == 0) { |
| 837 | /* we found notthing violating our disk layout */ |
| 838 | if (dasd_check_blocksize(count_area->dl) == 0) |
| 839 | device->bp_block = count_area->dl; |
| 840 | } |
| 841 | if (device->bp_block == 0) { |
| 842 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 843 | "Volume has incompatible disk layout"); |
| 844 | return -EMEDIUMTYPE; |
| 845 | } |
| 846 | device->s2b_shift = 0; /* bits to shift 512 to get a block */ |
| 847 | for (sb = 512; sb < device->bp_block; sb = sb << 1) |
| 848 | device->s2b_shift++; |
| 849 | |
| 850 | blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); |
| 851 | device->blocks = (private->rdc_data.no_cyl * |
| 852 | private->rdc_data.trk_per_cyl * |
| 853 | blk_per_trk); |
| 854 | |
| 855 | DEV_MESSAGE(KERN_INFO, device, |
| 856 | "(%dkB blks): %dkB at %dkB/trk %s", |
| 857 | (device->bp_block >> 10), |
| 858 | ((private->rdc_data.no_cyl * |
| 859 | private->rdc_data.trk_per_cyl * |
| 860 | blk_per_trk * (device->bp_block >> 9)) >> 1), |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 861 | ((blk_per_trk * device->bp_block) >> 10), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | private->uses_cdl ? |
| 863 | "compatible disk layout" : "linux disk layout"); |
| 864 | |
| 865 | return 0; |
| 866 | } |
| 867 | |
| 868 | static int |
| 869 | dasd_eckd_do_analysis(struct dasd_device *device) |
| 870 | { |
| 871 | struct dasd_eckd_private *private; |
| 872 | |
| 873 | private = (struct dasd_eckd_private *) device->private; |
| 874 | if (private->init_cqr_status < 0) |
| 875 | return dasd_eckd_start_analysis(device); |
| 876 | else |
| 877 | return dasd_eckd_end_analysis(device); |
| 878 | } |
| 879 | |
| 880 | static int |
| 881 | dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) |
| 882 | { |
| 883 | struct dasd_eckd_private *private; |
| 884 | |
| 885 | private = (struct dasd_eckd_private *) device->private; |
| 886 | if (dasd_check_blocksize(device->bp_block) == 0) { |
| 887 | geo->sectors = recs_per_track(&private->rdc_data, |
| 888 | 0, device->bp_block); |
| 889 | } |
| 890 | geo->cylinders = private->rdc_data.no_cyl; |
| 891 | geo->heads = private->rdc_data.trk_per_cyl; |
| 892 | return 0; |
| 893 | } |
| 894 | |
| 895 | static struct dasd_ccw_req * |
| 896 | dasd_eckd_format_device(struct dasd_device * device, |
| 897 | struct format_data_t * fdata) |
| 898 | { |
| 899 | struct dasd_eckd_private *private; |
| 900 | struct dasd_ccw_req *fcp; |
| 901 | struct eckd_count *ect; |
| 902 | struct ccw1 *ccw; |
| 903 | void *data; |
| 904 | int rpt, cyl, head; |
| 905 | int cplength, datasize; |
| 906 | int i; |
| 907 | |
| 908 | private = (struct dasd_eckd_private *) device->private; |
| 909 | rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); |
| 910 | cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; |
| 911 | head = fdata->start_unit % private->rdc_data.trk_per_cyl; |
| 912 | |
| 913 | /* Sanity checks. */ |
| 914 | if (fdata->start_unit >= |
| 915 | (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { |
| 916 | DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", |
| 917 | fdata->start_unit); |
| 918 | return ERR_PTR(-EINVAL); |
| 919 | } |
| 920 | if (fdata->start_unit > fdata->stop_unit) { |
| 921 | DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", |
| 922 | fdata->start_unit); |
| 923 | return ERR_PTR(-EINVAL); |
| 924 | } |
| 925 | if (dasd_check_blocksize(fdata->blksize) != 0) { |
| 926 | DEV_MESSAGE(KERN_WARNING, device, |
| 927 | "Invalid blocksize %d...terminating!", |
| 928 | fdata->blksize); |
| 929 | return ERR_PTR(-EINVAL); |
| 930 | } |
| 931 | |
| 932 | /* |
| 933 | * fdata->intensity is a bit string that tells us what to do: |
| 934 | * Bit 0: write record zero |
| 935 | * Bit 1: write home address, currently not supported |
| 936 | * Bit 2: invalidate tracks |
| 937 | * Bit 3: use OS/390 compatible disk layout (cdl) |
| 938 | * Only some bit combinations do make sense. |
| 939 | */ |
| 940 | switch (fdata->intensity) { |
| 941 | case 0x00: /* Normal format */ |
| 942 | case 0x08: /* Normal format, use cdl. */ |
| 943 | cplength = 2 + rpt; |
| 944 | datasize = sizeof(struct DE_eckd_data) + |
| 945 | sizeof(struct LO_eckd_data) + |
| 946 | rpt * sizeof(struct eckd_count); |
| 947 | break; |
| 948 | case 0x01: /* Write record zero and format track. */ |
| 949 | case 0x09: /* Write record zero and format track, use cdl. */ |
| 950 | cplength = 3 + rpt; |
| 951 | datasize = sizeof(struct DE_eckd_data) + |
| 952 | sizeof(struct LO_eckd_data) + |
| 953 | sizeof(struct eckd_count) + |
| 954 | rpt * sizeof(struct eckd_count); |
| 955 | break; |
| 956 | case 0x04: /* Invalidate track. */ |
| 957 | case 0x0c: /* Invalidate track, use cdl. */ |
| 958 | cplength = 3; |
| 959 | datasize = sizeof(struct DE_eckd_data) + |
| 960 | sizeof(struct LO_eckd_data) + |
| 961 | sizeof(struct eckd_count); |
| 962 | break; |
| 963 | default: |
| 964 | DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", |
| 965 | fdata->intensity); |
| 966 | return ERR_PTR(-EINVAL); |
| 967 | } |
| 968 | /* Allocate the format ccw request. */ |
| 969 | fcp = dasd_smalloc_request(dasd_eckd_discipline.name, |
| 970 | cplength, datasize, device); |
| 971 | if (IS_ERR(fcp)) |
| 972 | return fcp; |
| 973 | |
| 974 | data = fcp->data; |
| 975 | ccw = fcp->cpaddr; |
| 976 | |
| 977 | switch (fdata->intensity & ~0x08) { |
| 978 | case 0x00: /* Normal format. */ |
| 979 | define_extent(ccw++, (struct DE_eckd_data *) data, |
| 980 | fdata->start_unit, fdata->start_unit, |
| 981 | DASD_ECKD_CCW_WRITE_CKD, device); |
| 982 | data += sizeof(struct DE_eckd_data); |
| 983 | ccw[-1].flags |= CCW_FLAG_CC; |
| 984 | locate_record(ccw++, (struct LO_eckd_data *) data, |
| 985 | fdata->start_unit, 0, rpt, |
| 986 | DASD_ECKD_CCW_WRITE_CKD, device, |
| 987 | fdata->blksize); |
| 988 | data += sizeof(struct LO_eckd_data); |
| 989 | break; |
| 990 | case 0x01: /* Write record zero + format track. */ |
| 991 | define_extent(ccw++, (struct DE_eckd_data *) data, |
| 992 | fdata->start_unit, fdata->start_unit, |
| 993 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, |
| 994 | device); |
| 995 | data += sizeof(struct DE_eckd_data); |
| 996 | ccw[-1].flags |= CCW_FLAG_CC; |
| 997 | locate_record(ccw++, (struct LO_eckd_data *) data, |
| 998 | fdata->start_unit, 0, rpt + 1, |
| 999 | DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, |
| 1000 | device->bp_block); |
| 1001 | data += sizeof(struct LO_eckd_data); |
| 1002 | break; |
| 1003 | case 0x04: /* Invalidate track. */ |
| 1004 | define_extent(ccw++, (struct DE_eckd_data *) data, |
| 1005 | fdata->start_unit, fdata->start_unit, |
| 1006 | DASD_ECKD_CCW_WRITE_CKD, device); |
| 1007 | data += sizeof(struct DE_eckd_data); |
| 1008 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1009 | locate_record(ccw++, (struct LO_eckd_data *) data, |
| 1010 | fdata->start_unit, 0, 1, |
| 1011 | DASD_ECKD_CCW_WRITE_CKD, device, 8); |
| 1012 | data += sizeof(struct LO_eckd_data); |
| 1013 | break; |
| 1014 | } |
| 1015 | if (fdata->intensity & 0x01) { /* write record zero */ |
| 1016 | ect = (struct eckd_count *) data; |
| 1017 | data += sizeof(struct eckd_count); |
| 1018 | ect->cyl = cyl; |
| 1019 | ect->head = head; |
| 1020 | ect->record = 0; |
| 1021 | ect->kl = 0; |
| 1022 | ect->dl = 8; |
| 1023 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1024 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; |
| 1025 | ccw->flags = CCW_FLAG_SLI; |
| 1026 | ccw->count = 8; |
| 1027 | ccw->cda = (__u32)(addr_t) ect; |
| 1028 | ccw++; |
| 1029 | } |
| 1030 | if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ |
| 1031 | ect = (struct eckd_count *) data; |
| 1032 | data += sizeof(struct eckd_count); |
| 1033 | ect->cyl = cyl; |
| 1034 | ect->head = head; |
| 1035 | ect->record = 1; |
| 1036 | ect->kl = 0; |
| 1037 | ect->dl = 0; |
| 1038 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1039 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; |
| 1040 | ccw->flags = CCW_FLAG_SLI; |
| 1041 | ccw->count = 8; |
| 1042 | ccw->cda = (__u32)(addr_t) ect; |
| 1043 | } else { /* write remaining records */ |
| 1044 | for (i = 0; i < rpt; i++) { |
| 1045 | ect = (struct eckd_count *) data; |
| 1046 | data += sizeof(struct eckd_count); |
| 1047 | ect->cyl = cyl; |
| 1048 | ect->head = head; |
| 1049 | ect->record = i + 1; |
| 1050 | ect->kl = 0; |
| 1051 | ect->dl = fdata->blksize; |
| 1052 | /* Check for special tracks 0-1 when formatting CDL */ |
| 1053 | if ((fdata->intensity & 0x08) && |
| 1054 | fdata->start_unit == 0) { |
| 1055 | if (i < 3) { |
| 1056 | ect->kl = 4; |
| 1057 | ect->dl = sizes_trk0[i] - 4; |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 1058 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
| 1060 | if ((fdata->intensity & 0x08) && |
| 1061 | fdata->start_unit == 1) { |
| 1062 | ect->kl = 44; |
| 1063 | ect->dl = LABEL_SIZE - 44; |
| 1064 | } |
| 1065 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1066 | ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; |
| 1067 | ccw->flags = CCW_FLAG_SLI; |
| 1068 | ccw->count = 8; |
| 1069 | ccw->cda = (__u32)(addr_t) ect; |
| 1070 | ccw++; |
| 1071 | } |
| 1072 | } |
| 1073 | fcp->device = device; |
| 1074 | fcp->retries = 2; /* set retry counter to enable ERP */ |
| 1075 | fcp->buildclk = get_clock(); |
| 1076 | fcp->status = DASD_CQR_FILLED; |
| 1077 | return fcp; |
| 1078 | } |
| 1079 | |
| 1080 | static dasd_era_t |
| 1081 | dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) |
| 1082 | { |
| 1083 | struct dasd_device *device = (struct dasd_device *) cqr->device; |
| 1084 | struct ccw_device *cdev = device->cdev; |
| 1085 | |
| 1086 | if (irb->scsw.cstat == 0x00 && |
| 1087 | irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) |
| 1088 | return dasd_era_none; |
| 1089 | |
| 1090 | switch (cdev->id.cu_type) { |
| 1091 | case 0x3990: |
| 1092 | case 0x2105: |
| 1093 | case 0x2107: |
| 1094 | case 0x1750: |
| 1095 | return dasd_3990_erp_examine(cqr, irb); |
| 1096 | case 0x9343: |
| 1097 | return dasd_9343_erp_examine(cqr, irb); |
| 1098 | case 0x3880: |
| 1099 | default: |
| 1100 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 1101 | "default (unknown CU type) - RECOVERABLE return"); |
| 1102 | return dasd_era_recover; |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | static dasd_erp_fn_t |
| 1107 | dasd_eckd_erp_action(struct dasd_ccw_req * cqr) |
| 1108 | { |
| 1109 | struct dasd_device *device = (struct dasd_device *) cqr->device; |
| 1110 | struct ccw_device *cdev = device->cdev; |
| 1111 | |
| 1112 | switch (cdev->id.cu_type) { |
| 1113 | case 0x3990: |
| 1114 | case 0x2105: |
| 1115 | case 0x2107: |
| 1116 | case 0x1750: |
| 1117 | return dasd_3990_erp_action; |
| 1118 | case 0x9343: |
| 1119 | case 0x3880: |
| 1120 | default: |
| 1121 | return dasd_default_erp_action; |
| 1122 | } |
| 1123 | } |
| 1124 | |
| 1125 | static dasd_erp_fn_t |
| 1126 | dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) |
| 1127 | { |
| 1128 | return dasd_default_erp_postaction; |
| 1129 | } |
| 1130 | |
| 1131 | static struct dasd_ccw_req * |
| 1132 | dasd_eckd_build_cp(struct dasd_device * device, struct request *req) |
| 1133 | { |
| 1134 | struct dasd_eckd_private *private; |
| 1135 | unsigned long *idaws; |
| 1136 | struct LO_eckd_data *LO_data; |
| 1137 | struct dasd_ccw_req *cqr; |
| 1138 | struct ccw1 *ccw; |
| 1139 | struct bio *bio; |
| 1140 | struct bio_vec *bv; |
| 1141 | char *dst; |
| 1142 | unsigned int blksize, blk_per_trk, off; |
| 1143 | int count, cidaw, cplength, datasize; |
| 1144 | sector_t recid, first_rec, last_rec; |
| 1145 | sector_t first_trk, last_trk; |
| 1146 | unsigned int first_offs, last_offs; |
| 1147 | unsigned char cmd, rcmd; |
| 1148 | int i; |
| 1149 | |
| 1150 | private = (struct dasd_eckd_private *) device->private; |
| 1151 | if (rq_data_dir(req) == READ) |
| 1152 | cmd = DASD_ECKD_CCW_READ_MT; |
| 1153 | else if (rq_data_dir(req) == WRITE) |
| 1154 | cmd = DASD_ECKD_CCW_WRITE_MT; |
| 1155 | else |
| 1156 | return ERR_PTR(-EINVAL); |
| 1157 | /* Calculate number of blocks/records per track. */ |
| 1158 | blksize = device->bp_block; |
| 1159 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
| 1160 | /* Calculate record id of first and last block. */ |
| 1161 | first_rec = first_trk = req->sector >> device->s2b_shift; |
| 1162 | first_offs = sector_div(first_trk, blk_per_trk); |
| 1163 | last_rec = last_trk = |
| 1164 | (req->sector + req->nr_sectors - 1) >> device->s2b_shift; |
| 1165 | last_offs = sector_div(last_trk, blk_per_trk); |
| 1166 | /* Check struct bio and count the number of blocks for the request. */ |
| 1167 | count = 0; |
| 1168 | cidaw = 0; |
| 1169 | rq_for_each_bio(bio, req) { |
| 1170 | bio_for_each_segment(bv, bio, i) { |
| 1171 | if (bv->bv_len & (blksize - 1)) |
| 1172 | /* Eckd can only do full blocks. */ |
| 1173 | return ERR_PTR(-EINVAL); |
| 1174 | count += bv->bv_len >> (device->s2b_shift + 9); |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 1175 | #if defined(CONFIG_64BIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | if (idal_is_needed (page_address(bv->bv_page), |
| 1177 | bv->bv_len)) |
| 1178 | cidaw += bv->bv_len >> (device->s2b_shift + 9); |
| 1179 | #endif |
| 1180 | } |
| 1181 | } |
| 1182 | /* Paranoia. */ |
| 1183 | if (count != last_rec - first_rec + 1) |
| 1184 | return ERR_PTR(-EINVAL); |
| 1185 | /* 1x define extent + 1x locate record + number of blocks */ |
| 1186 | cplength = 2 + count; |
| 1187 | /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ |
| 1188 | datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + |
| 1189 | cidaw * sizeof(unsigned long); |
| 1190 | /* Find out the number of additional locate record ccws for cdl. */ |
| 1191 | if (private->uses_cdl && first_rec < 2*blk_per_trk) { |
| 1192 | if (last_rec >= 2*blk_per_trk) |
| 1193 | count = 2*blk_per_trk - first_rec; |
| 1194 | cplength += count; |
| 1195 | datasize += count*sizeof(struct LO_eckd_data); |
| 1196 | } |
| 1197 | /* Allocate the ccw request. */ |
| 1198 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
| 1199 | cplength, datasize, device); |
| 1200 | if (IS_ERR(cqr)) |
| 1201 | return cqr; |
| 1202 | ccw = cqr->cpaddr; |
| 1203 | /* First ccw is define extent. */ |
| 1204 | define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); |
| 1205 | /* Build locate_record+read/write/ccws. */ |
| 1206 | idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); |
| 1207 | LO_data = (struct LO_eckd_data *) (idaws + cidaw); |
| 1208 | recid = first_rec; |
| 1209 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { |
| 1210 | /* Only standard blocks so there is just one locate record. */ |
| 1211 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1212 | locate_record(ccw++, LO_data++, first_trk, first_offs + 1, |
| 1213 | last_rec - recid + 1, cmd, device, blksize); |
| 1214 | } |
| 1215 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { |
| 1216 | dst = page_address(bv->bv_page) + bv->bv_offset; |
| 1217 | if (dasd_page_cache) { |
| 1218 | char *copy = kmem_cache_alloc(dasd_page_cache, |
| 1219 | SLAB_DMA | __GFP_NOWARN); |
| 1220 | if (copy && rq_data_dir(req) == WRITE) |
| 1221 | memcpy(copy + bv->bv_offset, dst, bv->bv_len); |
| 1222 | if (copy) |
| 1223 | dst = copy + bv->bv_offset; |
| 1224 | } |
| 1225 | for (off = 0; off < bv->bv_len; off += blksize) { |
| 1226 | sector_t trkid = recid; |
| 1227 | unsigned int recoffs = sector_div(trkid, blk_per_trk); |
| 1228 | rcmd = cmd; |
| 1229 | count = blksize; |
| 1230 | /* Locate record for cdl special block ? */ |
| 1231 | if (private->uses_cdl && recid < 2*blk_per_trk) { |
| 1232 | if (dasd_eckd_cdl_special(blk_per_trk, recid)){ |
| 1233 | rcmd |= 0x8; |
| 1234 | count = dasd_eckd_cdl_reclen(recid); |
Horst Hummel | ec5883a | 2005-05-01 08:58:59 -0700 | [diff] [blame] | 1235 | if (count < blksize && |
| 1236 | rq_data_dir(req) == READ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | memset(dst + count, 0xe5, |
| 1238 | blksize - count); |
| 1239 | } |
| 1240 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1241 | locate_record(ccw++, LO_data++, |
| 1242 | trkid, recoffs + 1, |
| 1243 | 1, rcmd, device, count); |
| 1244 | } |
| 1245 | /* Locate record for standard blocks ? */ |
| 1246 | if (private->uses_cdl && recid == 2*blk_per_trk) { |
| 1247 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1248 | locate_record(ccw++, LO_data++, |
| 1249 | trkid, recoffs + 1, |
| 1250 | last_rec - recid + 1, |
| 1251 | cmd, device, count); |
| 1252 | } |
| 1253 | /* Read/write ccw. */ |
| 1254 | ccw[-1].flags |= CCW_FLAG_CC; |
| 1255 | ccw->cmd_code = rcmd; |
| 1256 | ccw->count = count; |
| 1257 | if (idal_is_needed(dst, blksize)) { |
| 1258 | ccw->cda = (__u32)(addr_t) idaws; |
| 1259 | ccw->flags = CCW_FLAG_IDA; |
| 1260 | idaws = idal_create_words(idaws, dst, blksize); |
| 1261 | } else { |
| 1262 | ccw->cda = (__u32)(addr_t) dst; |
| 1263 | ccw->flags = 0; |
| 1264 | } |
| 1265 | ccw++; |
| 1266 | dst += blksize; |
| 1267 | recid++; |
| 1268 | } |
| 1269 | } |
Horst Hummel | 1c01b8a | 2006-01-06 00:19:15 -0800 | [diff] [blame] | 1270 | if (req->flags & REQ_FAILFAST) |
| 1271 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | cqr->device = device; |
| 1273 | cqr->expires = 5 * 60 * HZ; /* 5 minutes */ |
| 1274 | cqr->lpm = private->path_data.ppm; |
| 1275 | cqr->retries = 256; |
| 1276 | cqr->buildclk = get_clock(); |
| 1277 | cqr->status = DASD_CQR_FILLED; |
| 1278 | return cqr; |
| 1279 | } |
| 1280 | |
| 1281 | static int |
| 1282 | dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) |
| 1283 | { |
| 1284 | struct dasd_eckd_private *private; |
| 1285 | struct ccw1 *ccw; |
| 1286 | struct bio *bio; |
| 1287 | struct bio_vec *bv; |
| 1288 | char *dst, *cda; |
| 1289 | unsigned int blksize, blk_per_trk, off; |
| 1290 | sector_t recid; |
| 1291 | int i, status; |
| 1292 | |
| 1293 | if (!dasd_page_cache) |
| 1294 | goto out; |
| 1295 | private = (struct dasd_eckd_private *) cqr->device->private; |
| 1296 | blksize = cqr->device->bp_block; |
| 1297 | blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
| 1298 | recid = req->sector >> cqr->device->s2b_shift; |
| 1299 | ccw = cqr->cpaddr; |
| 1300 | /* Skip over define extent & locate record. */ |
| 1301 | ccw++; |
| 1302 | if (private->uses_cdl == 0 || recid > 2*blk_per_trk) |
| 1303 | ccw++; |
| 1304 | rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { |
| 1305 | dst = page_address(bv->bv_page) + bv->bv_offset; |
| 1306 | for (off = 0; off < bv->bv_len; off += blksize) { |
| 1307 | /* Skip locate record. */ |
| 1308 | if (private->uses_cdl && recid <= 2*blk_per_trk) |
| 1309 | ccw++; |
| 1310 | if (dst) { |
| 1311 | if (ccw->flags & CCW_FLAG_IDA) |
| 1312 | cda = *((char **)((addr_t) ccw->cda)); |
| 1313 | else |
| 1314 | cda = (char *)((addr_t) ccw->cda); |
| 1315 | if (dst != cda) { |
| 1316 | if (rq_data_dir(req) == READ) |
| 1317 | memcpy(dst, cda, bv->bv_len); |
| 1318 | kmem_cache_free(dasd_page_cache, |
| 1319 | (void *)((addr_t)cda & PAGE_MASK)); |
| 1320 | } |
| 1321 | dst = NULL; |
| 1322 | } |
| 1323 | ccw++; |
| 1324 | recid++; |
| 1325 | } |
| 1326 | } |
| 1327 | out: |
| 1328 | status = cqr->status == DASD_CQR_DONE; |
| 1329 | dasd_sfree_request(cqr, cqr->device); |
| 1330 | return status; |
| 1331 | } |
| 1332 | |
| 1333 | static int |
| 1334 | dasd_eckd_fill_info(struct dasd_device * device, |
| 1335 | struct dasd_information2_t * info) |
| 1336 | { |
| 1337 | struct dasd_eckd_private *private; |
| 1338 | |
| 1339 | private = (struct dasd_eckd_private *) device->private; |
| 1340 | info->label_block = 2; |
| 1341 | info->FBA_layout = private->uses_cdl ? 0 : 1; |
| 1342 | info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; |
| 1343 | info->characteristics_size = sizeof(struct dasd_eckd_characteristics); |
| 1344 | memcpy(info->characteristics, &private->rdc_data, |
| 1345 | sizeof(struct dasd_eckd_characteristics)); |
| 1346 | info->confdata_size = sizeof (struct dasd_eckd_confdata); |
| 1347 | memcpy(info->configuration_data, &private->conf_data, |
| 1348 | sizeof (struct dasd_eckd_confdata)); |
| 1349 | return 0; |
| 1350 | } |
| 1351 | |
| 1352 | /* |
| 1353 | * SECTION: ioctl functions for eckd devices. |
| 1354 | */ |
| 1355 | |
| 1356 | /* |
| 1357 | * Release device ioctl. |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 1358 | * Buils a channel programm to releases a prior reserved |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | * (see dasd_eckd_reserve) device. |
| 1360 | */ |
| 1361 | static int |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1362 | dasd_eckd_release(struct dasd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | struct dasd_ccw_req *cqr; |
| 1365 | int rc; |
| 1366 | |
| 1367 | if (!capable(CAP_SYS_ADMIN)) |
| 1368 | return -EACCES; |
| 1369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
| 1371 | 1, 32, device); |
| 1372 | if (IS_ERR(cqr)) { |
| 1373 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 1374 | "Could not allocate initialization request"); |
| 1375 | return PTR_ERR(cqr); |
| 1376 | } |
| 1377 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; |
| 1378 | cqr->cpaddr->flags |= CCW_FLAG_SLI; |
| 1379 | cqr->cpaddr->count = 32; |
| 1380 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; |
| 1381 | cqr->device = device; |
| 1382 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
Horst Hummel | 1c01b8a | 2006-01-06 00:19:15 -0800 | [diff] [blame] | 1383 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | cqr->retries = 0; |
| 1385 | cqr->expires = 2 * HZ; |
| 1386 | cqr->buildclk = get_clock(); |
| 1387 | cqr->status = DASD_CQR_FILLED; |
| 1388 | |
| 1389 | rc = dasd_sleep_on_immediatly(cqr); |
| 1390 | |
| 1391 | dasd_sfree_request(cqr, cqr->device); |
| 1392 | return rc; |
| 1393 | } |
| 1394 | |
| 1395 | /* |
| 1396 | * Reserve device ioctl. |
| 1397 | * Options are set to 'synchronous wait for interrupt' and |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 1398 | * 'timeout the request'. This leads to a terminate IO if |
| 1399 | * the interrupt is outstanding for a certain time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | */ |
| 1401 | static int |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1402 | dasd_eckd_reserve(struct dasd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | struct dasd_ccw_req *cqr; |
| 1405 | int rc; |
| 1406 | |
| 1407 | if (!capable(CAP_SYS_ADMIN)) |
| 1408 | return -EACCES; |
| 1409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
| 1411 | 1, 32, device); |
| 1412 | if (IS_ERR(cqr)) { |
| 1413 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 1414 | "Could not allocate initialization request"); |
| 1415 | return PTR_ERR(cqr); |
| 1416 | } |
| 1417 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; |
| 1418 | cqr->cpaddr->flags |= CCW_FLAG_SLI; |
| 1419 | cqr->cpaddr->count = 32; |
| 1420 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; |
| 1421 | cqr->device = device; |
| 1422 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
Horst Hummel | 1c01b8a | 2006-01-06 00:19:15 -0800 | [diff] [blame] | 1423 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | cqr->retries = 0; |
| 1425 | cqr->expires = 2 * HZ; |
| 1426 | cqr->buildclk = get_clock(); |
| 1427 | cqr->status = DASD_CQR_FILLED; |
| 1428 | |
| 1429 | rc = dasd_sleep_on_immediatly(cqr); |
| 1430 | |
| 1431 | dasd_sfree_request(cqr, cqr->device); |
| 1432 | return rc; |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * Steal lock ioctl - unconditional reserve device. |
Horst Hummel | 138c014 | 2006-06-29 14:58:12 +0200 | [diff] [blame] | 1437 | * Buils a channel programm to break a device's reservation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | * (unconditional reserve) |
| 1439 | */ |
| 1440 | static int |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1441 | dasd_eckd_steal_lock(struct dasd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | struct dasd_ccw_req *cqr; |
| 1444 | int rc; |
| 1445 | |
| 1446 | if (!capable(CAP_SYS_ADMIN)) |
| 1447 | return -EACCES; |
| 1448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
| 1450 | 1, 32, device); |
| 1451 | if (IS_ERR(cqr)) { |
| 1452 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 1453 | "Could not allocate initialization request"); |
| 1454 | return PTR_ERR(cqr); |
| 1455 | } |
| 1456 | cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; |
| 1457 | cqr->cpaddr->flags |= CCW_FLAG_SLI; |
| 1458 | cqr->cpaddr->count = 32; |
| 1459 | cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; |
| 1460 | cqr->device = device; |
| 1461 | clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
Horst Hummel | 1c01b8a | 2006-01-06 00:19:15 -0800 | [diff] [blame] | 1462 | set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | cqr->retries = 0; |
| 1464 | cqr->expires = 2 * HZ; |
| 1465 | cqr->buildclk = get_clock(); |
| 1466 | cqr->status = DASD_CQR_FILLED; |
| 1467 | |
| 1468 | rc = dasd_sleep_on_immediatly(cqr); |
| 1469 | |
| 1470 | dasd_sfree_request(cqr, cqr->device); |
| 1471 | return rc; |
| 1472 | } |
| 1473 | |
| 1474 | /* |
| 1475 | * Read performance statistics |
| 1476 | */ |
| 1477 | static int |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1478 | dasd_eckd_performance(struct dasd_device *device, void __user *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | struct dasd_psf_prssd_data *prssdp; |
| 1481 | struct dasd_rssd_perf_stats_t *stats; |
| 1482 | struct dasd_ccw_req *cqr; |
| 1483 | struct ccw1 *ccw; |
| 1484 | int rc; |
| 1485 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | cqr = dasd_smalloc_request(dasd_eckd_discipline.name, |
| 1487 | 1 /* PSF */ + 1 /* RSSD */ , |
| 1488 | (sizeof (struct dasd_psf_prssd_data) + |
| 1489 | sizeof (struct dasd_rssd_perf_stats_t)), |
| 1490 | device); |
| 1491 | if (IS_ERR(cqr)) { |
| 1492 | DEV_MESSAGE(KERN_WARNING, device, "%s", |
| 1493 | "Could not allocate initialization request"); |
| 1494 | return PTR_ERR(cqr); |
| 1495 | } |
| 1496 | cqr->device = device; |
| 1497 | cqr->retries = 0; |
| 1498 | cqr->expires = 10 * HZ; |
| 1499 | |
| 1500 | /* Prepare for Read Subsystem Data */ |
| 1501 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
| 1502 | memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); |
| 1503 | prssdp->order = PSF_ORDER_PRSSD; |
| 1504 | prssdp->suborder = 0x01; /* Perfomance Statistics */ |
| 1505 | prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ |
| 1506 | |
| 1507 | ccw = cqr->cpaddr; |
| 1508 | ccw->cmd_code = DASD_ECKD_CCW_PSF; |
| 1509 | ccw->count = sizeof (struct dasd_psf_prssd_data); |
| 1510 | ccw->flags |= CCW_FLAG_CC; |
| 1511 | ccw->cda = (__u32)(addr_t) prssdp; |
| 1512 | |
| 1513 | /* Read Subsystem Data - Performance Statistics */ |
| 1514 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); |
| 1515 | memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); |
| 1516 | |
| 1517 | ccw++; |
| 1518 | ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
| 1519 | ccw->count = sizeof (struct dasd_rssd_perf_stats_t); |
| 1520 | ccw->cda = (__u32)(addr_t) stats; |
| 1521 | |
| 1522 | cqr->buildclk = get_clock(); |
| 1523 | cqr->status = DASD_CQR_FILLED; |
| 1524 | rc = dasd_sleep_on(cqr); |
| 1525 | if (rc == 0) { |
| 1526 | /* Prepare for Read Subsystem Data */ |
| 1527 | prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
| 1528 | stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1529 | if (copy_to_user(argp, stats, |
| 1530 | sizeof(struct dasd_rssd_perf_stats_t))) |
| 1531 | rc = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | } |
| 1533 | dasd_sfree_request(cqr, cqr->device); |
| 1534 | return rc; |
| 1535 | } |
| 1536 | |
| 1537 | /* |
| 1538 | * Get attributes (cache operations) |
| 1539 | * Returnes the cache attributes used in Define Extend (DE). |
| 1540 | */ |
| 1541 | static int |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1542 | dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | { |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1544 | struct dasd_eckd_private *private = |
| 1545 | (struct dasd_eckd_private *)device->private; |
| 1546 | struct attrib_data_t attrib = private->attrib; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | int rc; |
| 1548 | |
| 1549 | if (!capable(CAP_SYS_ADMIN)) |
| 1550 | return -EACCES; |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1551 | if (!argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | return -EINVAL; |
| 1553 | |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1554 | rc = 0; |
| 1555 | if (copy_to_user(argp, (long *) &attrib, |
| 1556 | sizeof (struct attrib_data_t))) |
| 1557 | rc = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | |
| 1559 | return rc; |
| 1560 | } |
| 1561 | |
| 1562 | /* |
| 1563 | * Set attributes (cache operations) |
| 1564 | * Stores the attributes for cache operation to be used in Define Extend (DE). |
| 1565 | */ |
| 1566 | static int |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1567 | dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | { |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1569 | struct dasd_eckd_private *private = |
| 1570 | (struct dasd_eckd_private *)device->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | struct attrib_data_t attrib; |
| 1572 | |
| 1573 | if (!capable(CAP_SYS_ADMIN)) |
| 1574 | return -EACCES; |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1575 | if (!argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | return -EINVAL; |
| 1577 | |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1578 | if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | private->attrib = attrib; |
| 1581 | |
| 1582 | DEV_MESSAGE(KERN_INFO, device, |
| 1583 | "cache operation mode set to %x (%i cylinder prestage)", |
| 1584 | private->attrib.operation, private->attrib.nr_cyl); |
| 1585 | return 0; |
| 1586 | } |
| 1587 | |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1588 | static int |
| 1589 | dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) |
| 1590 | { |
| 1591 | switch (cmd) { |
| 1592 | case BIODASDGATTR: |
| 1593 | return dasd_eckd_get_attrib(device, argp); |
| 1594 | case BIODASDSATTR: |
| 1595 | return dasd_eckd_set_attrib(device, argp); |
| 1596 | case BIODASDPSRD: |
| 1597 | return dasd_eckd_performance(device, argp); |
| 1598 | case BIODASDRLSE: |
| 1599 | return dasd_eckd_release(device); |
| 1600 | case BIODASDRSRV: |
| 1601 | return dasd_eckd_reserve(device); |
| 1602 | case BIODASDSLCK: |
| 1603 | return dasd_eckd_steal_lock(device); |
| 1604 | default: |
| 1605 | return -ENOIOCTLCMD; |
| 1606 | } |
| 1607 | } |
| 1608 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | /* |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1610 | * Dump the range of CCWs into 'page' buffer |
| 1611 | * and return number of printed chars. |
| 1612 | */ |
| 1613 | static inline int |
| 1614 | dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) |
| 1615 | { |
| 1616 | int len, count; |
| 1617 | char *datap; |
| 1618 | |
| 1619 | len = 0; |
| 1620 | while (from <= to) { |
| 1621 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 1622 | " CCW %p: %08X %08X DAT:", |
| 1623 | from, ((int *) from)[0], ((int *) from)[1]); |
| 1624 | |
| 1625 | /* get pointer to data (consider IDALs) */ |
| 1626 | if (from->flags & CCW_FLAG_IDA) |
| 1627 | datap = (char *) *((addr_t *) (addr_t) from->cda); |
| 1628 | else |
| 1629 | datap = (char *) ((addr_t) from->cda); |
| 1630 | |
| 1631 | /* dump data (max 32 bytes) */ |
| 1632 | for (count = 0; count < from->count && count < 32; count++) { |
| 1633 | if (count % 8 == 0) len += sprintf(page + len, " "); |
| 1634 | if (count % 4 == 0) len += sprintf(page + len, " "); |
| 1635 | len += sprintf(page + len, "%02x", datap[count]); |
| 1636 | } |
| 1637 | len += sprintf(page + len, "\n"); |
| 1638 | from++; |
| 1639 | } |
| 1640 | return len; |
| 1641 | } |
| 1642 | |
| 1643 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | * Print sense data and related channel program. |
| 1645 | * Parts are printed because printk buffer is only 1024 bytes. |
| 1646 | */ |
| 1647 | static void |
| 1648 | dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, |
| 1649 | struct irb *irb) |
| 1650 | { |
| 1651 | char *page; |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1652 | struct ccw1 *first, *last, *fail, *from, *to; |
| 1653 | int len, sl, sct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | |
| 1655 | page = (char *) get_zeroed_page(GFP_ATOMIC); |
| 1656 | if (page == NULL) { |
| 1657 | DEV_MESSAGE(KERN_ERR, device, " %s", |
| 1658 | "No memory to dump sense data"); |
| 1659 | return; |
| 1660 | } |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1661 | /* dump the sense data */ |
| 1662 | len = sprintf(page, KERN_ERR PRINTK_HEADER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | " I/O status report for device %s:\n", |
| 1664 | device->cdev->dev.bus_id); |
| 1665 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 1666 | " in req: %p CS: 0x%02X DS: 0x%02X\n", req, |
| 1667 | irb->scsw.cstat, irb->scsw.dstat); |
| 1668 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 1669 | " device %s: Failing CCW: %p\n", |
| 1670 | device->cdev->dev.bus_id, |
| 1671 | (void *) (addr_t) irb->scsw.cpa); |
| 1672 | if (irb->esw.esw0.erw.cons) { |
| 1673 | for (sl = 0; sl < 4; sl++) { |
| 1674 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 1675 | " Sense(hex) %2d-%2d:", |
| 1676 | (8 * sl), ((8 * sl) + 7)); |
| 1677 | |
| 1678 | for (sct = 0; sct < 8; sct++) { |
| 1679 | len += sprintf(page + len, " %02x", |
| 1680 | irb->ecw[8 * sl + sct]); |
| 1681 | } |
| 1682 | len += sprintf(page + len, "\n"); |
| 1683 | } |
| 1684 | |
| 1685 | if (irb->ecw[27] & DASD_SENSE_BIT_0) { |
| 1686 | /* 24 Byte Sense Data */ |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1687 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 1688 | " 24 Byte: %x MSG %x, " |
| 1689 | "%s MSGb to SYSOP\n", |
| 1690 | irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, |
| 1691 | irb->ecw[1] & 0x10 ? "" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | } else { |
| 1693 | /* 32 Byte Sense Data */ |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1694 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 1695 | " 32 Byte: Format: %x " |
| 1696 | "Exception class %x\n", |
| 1697 | irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | } |
| 1699 | } else { |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1700 | sprintf(page + len, KERN_ERR PRINTK_HEADER |
| 1701 | " SORRY - NO VALID SENSE AVAILABLE\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | } |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1703 | printk("%s", page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1705 | /* dump the Channel Program (max 140 Bytes per line) */ |
| 1706 | /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ |
| 1707 | first = req->cpaddr; |
| 1708 | for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); |
| 1709 | to = min(first + 6, last); |
| 1710 | len = sprintf(page, KERN_ERR PRINTK_HEADER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | " Related CP in req: %p\n", req); |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1712 | dasd_eckd_dump_ccw_range(first, to, page + len); |
| 1713 | printk("%s", page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1715 | /* print failing CCW area (maximum 4) */ |
| 1716 | /* scsw->cda is either valid or zero */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | len = 0; |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1718 | from = ++to; |
| 1719 | fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ |
| 1720 | if (from < fail - 2) { |
| 1721 | from = fail - 2; /* there is a gap - print header */ |
| 1722 | len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | } |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1724 | to = min(fail + 1, last); |
| 1725 | len += dasd_eckd_dump_ccw_range(from, to, page + len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1727 | /* print last CCWs (maximum 2) */ |
| 1728 | from = max(from, ++to); |
| 1729 | if (from < last - 1) { |
| 1730 | from = last - 1; /* there is a gap - print header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); |
| 1732 | } |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1733 | len += dasd_eckd_dump_ccw_range(from, last, page + len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | if (len > 0) |
Horst Hummel | 445b5b4 | 2006-06-29 14:57:52 +0200 | [diff] [blame] | 1735 | printk("%s", page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | free_page((unsigned long) page); |
| 1737 | } |
| 1738 | |
| 1739 | /* |
| 1740 | * max_blocks is dependent on the amount of storage that is available |
| 1741 | * in the static io buffer for each device. Currently each device has |
| 1742 | * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has |
| 1743 | * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use |
| 1744 | * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In |
| 1745 | * addition we have one define extent ccw + 16 bytes of data and one |
| 1746 | * locate record ccw + 16 bytes of data. That makes: |
| 1747 | * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. |
| 1748 | * We want to fit two into the available memory so that we can immediately |
| 1749 | * start the next request if one finishes off. That makes 249.5 blocks |
| 1750 | * for one request. Give a little safety and the result is 240. |
| 1751 | */ |
| 1752 | static struct dasd_discipline dasd_eckd_discipline = { |
| 1753 | .owner = THIS_MODULE, |
| 1754 | .name = "ECKD", |
| 1755 | .ebcname = "ECKD", |
| 1756 | .max_blocks = 240, |
| 1757 | .check_device = dasd_eckd_check_characteristics, |
| 1758 | .do_analysis = dasd_eckd_do_analysis, |
| 1759 | .fill_geometry = dasd_eckd_fill_geometry, |
| 1760 | .start_IO = dasd_start_IO, |
| 1761 | .term_IO = dasd_term_IO, |
| 1762 | .format_device = dasd_eckd_format_device, |
| 1763 | .examine_error = dasd_eckd_examine_error, |
| 1764 | .erp_action = dasd_eckd_erp_action, |
| 1765 | .erp_postaction = dasd_eckd_erp_postaction, |
| 1766 | .build_cp = dasd_eckd_build_cp, |
| 1767 | .free_cp = dasd_eckd_free_cp, |
| 1768 | .dump_sense = dasd_eckd_dump_sense, |
| 1769 | .fill_info = dasd_eckd_fill_info, |
Christoph Hellwig | 1107ccf | 2006-03-24 03:15:20 -0800 | [diff] [blame] | 1770 | .ioctl = dasd_eckd_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | }; |
| 1772 | |
| 1773 | static int __init |
| 1774 | dasd_eckd_init(void) |
| 1775 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | ASCEBC(dasd_eckd_discipline.ebcname, 4); |
Horst Hummel | 4054557 | 2006-06-29 15:08:18 +0200 | [diff] [blame^] | 1777 | return ccw_driver_register(&dasd_eckd_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | } |
| 1779 | |
| 1780 | static void __exit |
| 1781 | dasd_eckd_cleanup(void) |
| 1782 | { |
| 1783 | ccw_driver_unregister(&dasd_eckd_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | } |
| 1785 | |
| 1786 | module_init(dasd_eckd_init); |
| 1787 | module_exit(dasd_eckd_cleanup); |