Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Driver for s390 chsc subchannels |
| 3 | * |
Cornelia Huck | ad285ae | 2009-06-16 10:30:24 +0200 | [diff] [blame] | 4 | * Copyright IBM Corp. 2008, 2009 |
| 5 | * |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 6 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include <linux/device.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/uaccess.h> |
| 13 | #include <linux/miscdevice.h> |
| 14 | |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 15 | #include <asm/compat.h> |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 16 | #include <asm/cio.h> |
| 17 | #include <asm/chsc.h> |
| 18 | #include <asm/isc.h> |
| 19 | |
| 20 | #include "cio.h" |
| 21 | #include "cio_debug.h" |
| 22 | #include "css.h" |
| 23 | #include "chsc_sch.h" |
| 24 | #include "ioasm.h" |
| 25 | |
| 26 | static debug_info_t *chsc_debug_msg_id; |
| 27 | static debug_info_t *chsc_debug_log_id; |
| 28 | |
| 29 | #define CHSC_MSG(imp, args...) do { \ |
| 30 | debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ |
| 31 | } while (0) |
| 32 | |
| 33 | #define CHSC_LOG(imp, txt) do { \ |
| 34 | debug_text_event(chsc_debug_log_id, imp , txt); \ |
| 35 | } while (0) |
| 36 | |
| 37 | static void CHSC_LOG_HEX(int level, void *data, int length) |
| 38 | { |
| 39 | while (length > 0) { |
| 40 | debug_event(chsc_debug_log_id, level, data, length); |
| 41 | length -= chsc_debug_log_id->buf_size; |
| 42 | data += chsc_debug_log_id->buf_size; |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | MODULE_AUTHOR("IBM Corporation"); |
| 47 | MODULE_DESCRIPTION("driver for s390 chsc subchannels"); |
| 48 | MODULE_LICENSE("GPL"); |
| 49 | |
| 50 | static void chsc_subchannel_irq(struct subchannel *sch) |
| 51 | { |
| 52 | struct chsc_private *private = sch->private; |
| 53 | struct chsc_request *request = private->request; |
Heiko Carstens | cbb870c | 2010-02-26 22:37:43 +0100 | [diff] [blame] | 54 | struct irb *irb = (struct irb *)&S390_lowcore.irb; |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 55 | |
| 56 | CHSC_LOG(4, "irb"); |
| 57 | CHSC_LOG_HEX(4, irb, sizeof(*irb)); |
| 58 | /* Copy irb to provided request and set done. */ |
| 59 | if (!request) { |
| 60 | CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n", |
| 61 | sch->schid.ssid, sch->schid.sch_no); |
| 62 | return; |
| 63 | } |
| 64 | private->request = NULL; |
| 65 | memcpy(&request->irb, irb, sizeof(*irb)); |
Sebastian Ott | cdb912a | 2008-12-25 13:39:12 +0100 | [diff] [blame] | 66 | cio_update_schib(sch); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 67 | complete(&request->completion); |
| 68 | put_device(&sch->dev); |
| 69 | } |
| 70 | |
| 71 | static int chsc_subchannel_probe(struct subchannel *sch) |
| 72 | { |
| 73 | struct chsc_private *private; |
| 74 | int ret; |
| 75 | |
| 76 | CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n", |
| 77 | sch->schid.ssid, sch->schid.sch_no); |
| 78 | sch->isc = CHSC_SCH_ISC; |
| 79 | private = kzalloc(sizeof(*private), GFP_KERNEL); |
| 80 | if (!private) |
| 81 | return -ENOMEM; |
| 82 | ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch); |
| 83 | if (ret) { |
| 84 | CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n", |
| 85 | sch->schid.ssid, sch->schid.sch_no, ret); |
| 86 | kfree(private); |
| 87 | } else { |
| 88 | sch->private = private; |
Ming Lei | f67f129 | 2009-03-01 21:10:49 +0800 | [diff] [blame] | 89 | if (dev_get_uevent_suppress(&sch->dev)) { |
| 90 | dev_set_uevent_suppress(&sch->dev, 0); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 91 | kobject_uevent(&sch->dev.kobj, KOBJ_ADD); |
| 92 | } |
| 93 | } |
| 94 | return ret; |
| 95 | } |
| 96 | |
| 97 | static int chsc_subchannel_remove(struct subchannel *sch) |
| 98 | { |
| 99 | struct chsc_private *private; |
| 100 | |
| 101 | cio_disable_subchannel(sch); |
| 102 | private = sch->private; |
| 103 | sch->private = NULL; |
| 104 | if (private->request) { |
| 105 | complete(&private->request->completion); |
| 106 | put_device(&sch->dev); |
| 107 | } |
| 108 | kfree(private); |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static void chsc_subchannel_shutdown(struct subchannel *sch) |
| 113 | { |
| 114 | cio_disable_subchannel(sch); |
| 115 | } |
| 116 | |
Cornelia Huck | ad285ae | 2009-06-16 10:30:24 +0200 | [diff] [blame] | 117 | static int chsc_subchannel_prepare(struct subchannel *sch) |
| 118 | { |
| 119 | int cc; |
| 120 | struct schib schib; |
| 121 | /* |
| 122 | * Don't allow suspend while the subchannel is not idle |
| 123 | * since we don't have a way to clear the subchannel and |
| 124 | * cannot disable it with a request running. |
| 125 | */ |
| 126 | cc = stsch(sch->schid, &schib); |
| 127 | if (!cc && scsw_stctl(&schib.scsw)) |
| 128 | return -EAGAIN; |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static int chsc_subchannel_freeze(struct subchannel *sch) |
| 133 | { |
| 134 | return cio_disable_subchannel(sch); |
| 135 | } |
| 136 | |
| 137 | static int chsc_subchannel_restore(struct subchannel *sch) |
| 138 | { |
| 139 | return cio_enable_subchannel(sch, (u32)(unsigned long)sch); |
| 140 | } |
| 141 | |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 142 | static struct css_device_id chsc_subchannel_ids[] = { |
| 143 | { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, |
| 144 | { /* end of list */ }, |
| 145 | }; |
| 146 | MODULE_DEVICE_TABLE(css, chsc_subchannel_ids); |
| 147 | |
| 148 | static struct css_driver chsc_subchannel_driver = { |
| 149 | .owner = THIS_MODULE, |
| 150 | .subchannel_type = chsc_subchannel_ids, |
| 151 | .irq = chsc_subchannel_irq, |
| 152 | .probe = chsc_subchannel_probe, |
| 153 | .remove = chsc_subchannel_remove, |
| 154 | .shutdown = chsc_subchannel_shutdown, |
Cornelia Huck | ad285ae | 2009-06-16 10:30:24 +0200 | [diff] [blame] | 155 | .prepare = chsc_subchannel_prepare, |
| 156 | .freeze = chsc_subchannel_freeze, |
| 157 | .thaw = chsc_subchannel_restore, |
| 158 | .restore = chsc_subchannel_restore, |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 159 | .name = "chsc_subchannel", |
| 160 | }; |
| 161 | |
| 162 | static int __init chsc_init_dbfs(void) |
| 163 | { |
| 164 | chsc_debug_msg_id = debug_register("chsc_msg", 16, 1, |
| 165 | 16 * sizeof(long)); |
| 166 | if (!chsc_debug_msg_id) |
| 167 | goto out; |
| 168 | debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); |
| 169 | debug_set_level(chsc_debug_msg_id, 2); |
| 170 | chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16); |
| 171 | if (!chsc_debug_log_id) |
| 172 | goto out; |
| 173 | debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view); |
| 174 | debug_set_level(chsc_debug_log_id, 2); |
| 175 | return 0; |
| 176 | out: |
| 177 | if (chsc_debug_msg_id) |
| 178 | debug_unregister(chsc_debug_msg_id); |
| 179 | return -ENOMEM; |
| 180 | } |
| 181 | |
| 182 | static void chsc_remove_dbfs(void) |
| 183 | { |
| 184 | debug_unregister(chsc_debug_log_id); |
| 185 | debug_unregister(chsc_debug_msg_id); |
| 186 | } |
| 187 | |
| 188 | static int __init chsc_init_sch_driver(void) |
| 189 | { |
| 190 | return css_driver_register(&chsc_subchannel_driver); |
| 191 | } |
| 192 | |
| 193 | static void chsc_cleanup_sch_driver(void) |
| 194 | { |
| 195 | css_driver_unregister(&chsc_subchannel_driver); |
| 196 | } |
| 197 | |
| 198 | static DEFINE_SPINLOCK(chsc_lock); |
| 199 | |
| 200 | static int chsc_subchannel_match_next_free(struct device *dev, void *data) |
| 201 | { |
| 202 | struct subchannel *sch = to_subchannel(dev); |
| 203 | |
| 204 | return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw); |
| 205 | } |
| 206 | |
| 207 | static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch) |
| 208 | { |
| 209 | struct device *dev; |
| 210 | |
| 211 | dev = driver_find_device(&chsc_subchannel_driver.drv, |
| 212 | sch ? &sch->dev : NULL, NULL, |
| 213 | chsc_subchannel_match_next_free); |
| 214 | return dev ? to_subchannel(dev) : NULL; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * chsc_async() - try to start a chsc request asynchronously |
| 219 | * @chsc_area: request to be started |
| 220 | * @request: request structure to associate |
| 221 | * |
| 222 | * Tries to start a chsc request on one of the existing chsc subchannels. |
| 223 | * Returns: |
| 224 | * %0 if the request was performed synchronously |
| 225 | * %-EINPROGRESS if the request was successfully started |
| 226 | * %-EBUSY if all chsc subchannels are busy |
| 227 | * %-ENODEV if no chsc subchannels are available |
| 228 | * Context: |
| 229 | * interrupts disabled, chsc_lock held |
| 230 | */ |
| 231 | static int chsc_async(struct chsc_async_area *chsc_area, |
| 232 | struct chsc_request *request) |
| 233 | { |
| 234 | int cc; |
| 235 | struct chsc_private *private; |
| 236 | struct subchannel *sch = NULL; |
| 237 | int ret = -ENODEV; |
| 238 | char dbf[10]; |
| 239 | |
Heiko Carstens | d1bf859 | 2010-02-26 22:37:30 +0100 | [diff] [blame] | 240 | chsc_area->header.key = PAGE_DEFAULT_KEY >> 4; |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 241 | while ((sch = chsc_get_next_subchannel(sch))) { |
| 242 | spin_lock(sch->lock); |
| 243 | private = sch->private; |
| 244 | if (private->request) { |
| 245 | spin_unlock(sch->lock); |
| 246 | ret = -EBUSY; |
| 247 | continue; |
| 248 | } |
| 249 | chsc_area->header.sid = sch->schid; |
| 250 | CHSC_LOG(2, "schid"); |
| 251 | CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid)); |
| 252 | cc = chsc(chsc_area); |
| 253 | sprintf(dbf, "cc:%d", cc); |
| 254 | CHSC_LOG(2, dbf); |
| 255 | switch (cc) { |
| 256 | case 0: |
| 257 | ret = 0; |
| 258 | break; |
| 259 | case 1: |
| 260 | sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC; |
| 261 | ret = -EINPROGRESS; |
| 262 | private->request = request; |
| 263 | break; |
| 264 | case 2: |
| 265 | ret = -EBUSY; |
| 266 | break; |
| 267 | default: |
| 268 | ret = -ENODEV; |
| 269 | } |
| 270 | spin_unlock(sch->lock); |
| 271 | CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n", |
| 272 | sch->schid.ssid, sch->schid.sch_no, cc); |
| 273 | if (ret == -EINPROGRESS) |
| 274 | return -EINPROGRESS; |
| 275 | put_device(&sch->dev); |
| 276 | if (ret == 0) |
| 277 | return 0; |
| 278 | } |
| 279 | return ret; |
| 280 | } |
| 281 | |
| 282 | static void chsc_log_command(struct chsc_async_area *chsc_area) |
| 283 | { |
| 284 | char dbf[10]; |
| 285 | |
| 286 | sprintf(dbf, "CHSC:%x", chsc_area->header.code); |
| 287 | CHSC_LOG(0, dbf); |
| 288 | CHSC_LOG_HEX(0, chsc_area, 32); |
| 289 | } |
| 290 | |
| 291 | static int chsc_examine_irb(struct chsc_request *request) |
| 292 | { |
| 293 | int backed_up; |
| 294 | |
Julia Lawall | b2bbb64 | 2008-10-10 21:33:16 +0200 | [diff] [blame] | 295 | if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 296 | return -EIO; |
| 297 | backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK; |
| 298 | request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK; |
| 299 | if (scsw_cstat(&request->irb.scsw) == 0) |
| 300 | return 0; |
| 301 | if (!backed_up) |
| 302 | return 0; |
| 303 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK) |
| 304 | return -EIO; |
| 305 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK) |
| 306 | return -EPERM; |
| 307 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK) |
| 308 | return -EAGAIN; |
| 309 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK) |
| 310 | return -EAGAIN; |
| 311 | return -EIO; |
| 312 | } |
| 313 | |
| 314 | static int chsc_ioctl_start(void __user *user_area) |
| 315 | { |
| 316 | struct chsc_request *request; |
| 317 | struct chsc_async_area *chsc_area; |
| 318 | int ret; |
| 319 | char dbf[10]; |
| 320 | |
| 321 | if (!css_general_characteristics.dynio) |
| 322 | /* It makes no sense to try. */ |
| 323 | return -EOPNOTSUPP; |
| 324 | chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); |
| 325 | if (!chsc_area) |
| 326 | return -ENOMEM; |
| 327 | request = kzalloc(sizeof(*request), GFP_KERNEL); |
| 328 | if (!request) { |
| 329 | ret = -ENOMEM; |
| 330 | goto out_free; |
| 331 | } |
| 332 | init_completion(&request->completion); |
| 333 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { |
| 334 | ret = -EFAULT; |
| 335 | goto out_free; |
| 336 | } |
| 337 | chsc_log_command(chsc_area); |
| 338 | spin_lock_irq(&chsc_lock); |
| 339 | ret = chsc_async(chsc_area, request); |
| 340 | spin_unlock_irq(&chsc_lock); |
| 341 | if (ret == -EINPROGRESS) { |
| 342 | wait_for_completion(&request->completion); |
| 343 | ret = chsc_examine_irb(request); |
| 344 | } |
| 345 | /* copy area back to user */ |
| 346 | if (!ret) |
| 347 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) |
| 348 | ret = -EFAULT; |
| 349 | out_free: |
| 350 | sprintf(dbf, "ret:%d", ret); |
| 351 | CHSC_LOG(0, dbf); |
| 352 | kfree(request); |
| 353 | free_page((unsigned long)chsc_area); |
| 354 | return ret; |
| 355 | } |
| 356 | |
| 357 | static int chsc_ioctl_info_channel_path(void __user *user_cd) |
| 358 | { |
| 359 | struct chsc_chp_cd *cd; |
| 360 | int ret, ccode; |
| 361 | struct { |
| 362 | struct chsc_header request; |
| 363 | u32 : 2; |
| 364 | u32 m : 1; |
| 365 | u32 : 1; |
| 366 | u32 fmt1 : 4; |
| 367 | u32 cssid : 8; |
| 368 | u32 : 8; |
| 369 | u32 first_chpid : 8; |
| 370 | u32 : 24; |
| 371 | u32 last_chpid : 8; |
| 372 | u32 : 32; |
| 373 | struct chsc_header response; |
| 374 | u8 data[PAGE_SIZE - 20]; |
| 375 | } __attribute__ ((packed)) *scpcd_area; |
| 376 | |
| 377 | scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 378 | if (!scpcd_area) |
| 379 | return -ENOMEM; |
| 380 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); |
| 381 | if (!cd) { |
| 382 | ret = -ENOMEM; |
| 383 | goto out_free; |
| 384 | } |
| 385 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { |
| 386 | ret = -EFAULT; |
| 387 | goto out_free; |
| 388 | } |
| 389 | scpcd_area->request.length = 0x0010; |
| 390 | scpcd_area->request.code = 0x0028; |
| 391 | scpcd_area->m = cd->m; |
| 392 | scpcd_area->fmt1 = cd->fmt; |
| 393 | scpcd_area->cssid = cd->chpid.cssid; |
| 394 | scpcd_area->first_chpid = cd->chpid.id; |
| 395 | scpcd_area->last_chpid = cd->chpid.id; |
| 396 | |
| 397 | ccode = chsc(scpcd_area); |
| 398 | if (ccode != 0) { |
| 399 | ret = -EIO; |
| 400 | goto out_free; |
| 401 | } |
| 402 | if (scpcd_area->response.code != 0x0001) { |
| 403 | ret = -EIO; |
| 404 | CHSC_MSG(0, "scpcd: response code=%x\n", |
| 405 | scpcd_area->response.code); |
| 406 | goto out_free; |
| 407 | } |
| 408 | memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length); |
| 409 | if (copy_to_user(user_cd, cd, sizeof(*cd))) |
| 410 | ret = -EFAULT; |
| 411 | else |
| 412 | ret = 0; |
| 413 | out_free: |
| 414 | kfree(cd); |
| 415 | free_page((unsigned long)scpcd_area); |
| 416 | return ret; |
| 417 | } |
| 418 | |
| 419 | static int chsc_ioctl_info_cu(void __user *user_cd) |
| 420 | { |
| 421 | struct chsc_cu_cd *cd; |
| 422 | int ret, ccode; |
| 423 | struct { |
| 424 | struct chsc_header request; |
| 425 | u32 : 2; |
| 426 | u32 m : 1; |
| 427 | u32 : 1; |
| 428 | u32 fmt1 : 4; |
| 429 | u32 cssid : 8; |
| 430 | u32 : 8; |
| 431 | u32 first_cun : 8; |
| 432 | u32 : 24; |
| 433 | u32 last_cun : 8; |
| 434 | u32 : 32; |
| 435 | struct chsc_header response; |
| 436 | u8 data[PAGE_SIZE - 20]; |
| 437 | } __attribute__ ((packed)) *scucd_area; |
| 438 | |
| 439 | scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 440 | if (!scucd_area) |
| 441 | return -ENOMEM; |
| 442 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); |
| 443 | if (!cd) { |
| 444 | ret = -ENOMEM; |
| 445 | goto out_free; |
| 446 | } |
| 447 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { |
| 448 | ret = -EFAULT; |
| 449 | goto out_free; |
| 450 | } |
| 451 | scucd_area->request.length = 0x0010; |
| 452 | scucd_area->request.code = 0x0028; |
| 453 | scucd_area->m = cd->m; |
| 454 | scucd_area->fmt1 = cd->fmt; |
| 455 | scucd_area->cssid = cd->cssid; |
| 456 | scucd_area->first_cun = cd->cun; |
| 457 | scucd_area->last_cun = cd->cun; |
| 458 | |
| 459 | ccode = chsc(scucd_area); |
| 460 | if (ccode != 0) { |
| 461 | ret = -EIO; |
| 462 | goto out_free; |
| 463 | } |
| 464 | if (scucd_area->response.code != 0x0001) { |
| 465 | ret = -EIO; |
| 466 | CHSC_MSG(0, "scucd: response code=%x\n", |
| 467 | scucd_area->response.code); |
| 468 | goto out_free; |
| 469 | } |
| 470 | memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length); |
| 471 | if (copy_to_user(user_cd, cd, sizeof(*cd))) |
| 472 | ret = -EFAULT; |
| 473 | else |
| 474 | ret = 0; |
| 475 | out_free: |
| 476 | kfree(cd); |
| 477 | free_page((unsigned long)scucd_area); |
| 478 | return ret; |
| 479 | } |
| 480 | |
| 481 | static int chsc_ioctl_info_sch_cu(void __user *user_cud) |
| 482 | { |
| 483 | struct chsc_sch_cud *cud; |
| 484 | int ret, ccode; |
| 485 | struct { |
| 486 | struct chsc_header request; |
| 487 | u32 : 2; |
| 488 | u32 m : 1; |
| 489 | u32 : 5; |
| 490 | u32 fmt1 : 4; |
| 491 | u32 : 2; |
| 492 | u32 ssid : 2; |
| 493 | u32 first_sch : 16; |
| 494 | u32 : 8; |
| 495 | u32 cssid : 8; |
| 496 | u32 last_sch : 16; |
| 497 | u32 : 32; |
| 498 | struct chsc_header response; |
| 499 | u8 data[PAGE_SIZE - 20]; |
| 500 | } __attribute__ ((packed)) *sscud_area; |
| 501 | |
| 502 | sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 503 | if (!sscud_area) |
| 504 | return -ENOMEM; |
| 505 | cud = kzalloc(sizeof(*cud), GFP_KERNEL); |
| 506 | if (!cud) { |
| 507 | ret = -ENOMEM; |
| 508 | goto out_free; |
| 509 | } |
| 510 | if (copy_from_user(cud, user_cud, sizeof(*cud))) { |
| 511 | ret = -EFAULT; |
| 512 | goto out_free; |
| 513 | } |
| 514 | sscud_area->request.length = 0x0010; |
| 515 | sscud_area->request.code = 0x0006; |
| 516 | sscud_area->m = cud->schid.m; |
| 517 | sscud_area->fmt1 = cud->fmt; |
| 518 | sscud_area->ssid = cud->schid.ssid; |
| 519 | sscud_area->first_sch = cud->schid.sch_no; |
| 520 | sscud_area->cssid = cud->schid.cssid; |
| 521 | sscud_area->last_sch = cud->schid.sch_no; |
| 522 | |
| 523 | ccode = chsc(sscud_area); |
| 524 | if (ccode != 0) { |
| 525 | ret = -EIO; |
| 526 | goto out_free; |
| 527 | } |
| 528 | if (sscud_area->response.code != 0x0001) { |
| 529 | ret = -EIO; |
| 530 | CHSC_MSG(0, "sscud: response code=%x\n", |
| 531 | sscud_area->response.code); |
| 532 | goto out_free; |
| 533 | } |
| 534 | memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length); |
| 535 | if (copy_to_user(user_cud, cud, sizeof(*cud))) |
| 536 | ret = -EFAULT; |
| 537 | else |
| 538 | ret = 0; |
| 539 | out_free: |
| 540 | kfree(cud); |
| 541 | free_page((unsigned long)sscud_area); |
| 542 | return ret; |
| 543 | } |
| 544 | |
| 545 | static int chsc_ioctl_conf_info(void __user *user_ci) |
| 546 | { |
| 547 | struct chsc_conf_info *ci; |
| 548 | int ret, ccode; |
| 549 | struct { |
| 550 | struct chsc_header request; |
| 551 | u32 : 2; |
| 552 | u32 m : 1; |
| 553 | u32 : 1; |
| 554 | u32 fmt1 : 4; |
| 555 | u32 cssid : 8; |
| 556 | u32 : 6; |
| 557 | u32 ssid : 2; |
| 558 | u32 : 8; |
| 559 | u64 : 64; |
| 560 | struct chsc_header response; |
| 561 | u8 data[PAGE_SIZE - 20]; |
| 562 | } __attribute__ ((packed)) *sci_area; |
| 563 | |
| 564 | sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 565 | if (!sci_area) |
| 566 | return -ENOMEM; |
| 567 | ci = kzalloc(sizeof(*ci), GFP_KERNEL); |
| 568 | if (!ci) { |
| 569 | ret = -ENOMEM; |
| 570 | goto out_free; |
| 571 | } |
| 572 | if (copy_from_user(ci, user_ci, sizeof(*ci))) { |
| 573 | ret = -EFAULT; |
| 574 | goto out_free; |
| 575 | } |
| 576 | sci_area->request.length = 0x0010; |
| 577 | sci_area->request.code = 0x0012; |
| 578 | sci_area->m = ci->id.m; |
| 579 | sci_area->fmt1 = ci->fmt; |
| 580 | sci_area->cssid = ci->id.cssid; |
| 581 | sci_area->ssid = ci->id.ssid; |
| 582 | |
| 583 | ccode = chsc(sci_area); |
| 584 | if (ccode != 0) { |
| 585 | ret = -EIO; |
| 586 | goto out_free; |
| 587 | } |
| 588 | if (sci_area->response.code != 0x0001) { |
| 589 | ret = -EIO; |
| 590 | CHSC_MSG(0, "sci: response code=%x\n", |
| 591 | sci_area->response.code); |
| 592 | goto out_free; |
| 593 | } |
| 594 | memcpy(&ci->scid, &sci_area->response, sci_area->response.length); |
| 595 | if (copy_to_user(user_ci, ci, sizeof(*ci))) |
| 596 | ret = -EFAULT; |
| 597 | else |
| 598 | ret = 0; |
| 599 | out_free: |
| 600 | kfree(ci); |
| 601 | free_page((unsigned long)sci_area); |
| 602 | return ret; |
| 603 | } |
| 604 | |
| 605 | static int chsc_ioctl_conf_comp_list(void __user *user_ccl) |
| 606 | { |
| 607 | struct chsc_comp_list *ccl; |
| 608 | int ret, ccode; |
| 609 | struct { |
| 610 | struct chsc_header request; |
| 611 | u32 ctype : 8; |
| 612 | u32 : 4; |
| 613 | u32 fmt : 4; |
| 614 | u32 : 16; |
| 615 | u64 : 64; |
| 616 | u32 list_parm[2]; |
| 617 | u64 : 64; |
| 618 | struct chsc_header response; |
| 619 | u8 data[PAGE_SIZE - 36]; |
| 620 | } __attribute__ ((packed)) *sccl_area; |
| 621 | struct { |
| 622 | u32 m : 1; |
| 623 | u32 : 31; |
| 624 | u32 cssid : 8; |
| 625 | u32 : 16; |
| 626 | u32 chpid : 8; |
| 627 | } __attribute__ ((packed)) *chpid_parm; |
| 628 | struct { |
| 629 | u32 f_cssid : 8; |
| 630 | u32 l_cssid : 8; |
| 631 | u32 : 16; |
| 632 | u32 res; |
| 633 | } __attribute__ ((packed)) *cssids_parm; |
| 634 | |
| 635 | sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 636 | if (!sccl_area) |
| 637 | return -ENOMEM; |
| 638 | ccl = kzalloc(sizeof(*ccl), GFP_KERNEL); |
| 639 | if (!ccl) { |
| 640 | ret = -ENOMEM; |
| 641 | goto out_free; |
| 642 | } |
| 643 | if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) { |
| 644 | ret = -EFAULT; |
| 645 | goto out_free; |
| 646 | } |
| 647 | sccl_area->request.length = 0x0020; |
| 648 | sccl_area->request.code = 0x0030; |
| 649 | sccl_area->fmt = ccl->req.fmt; |
| 650 | sccl_area->ctype = ccl->req.ctype; |
| 651 | switch (sccl_area->ctype) { |
| 652 | case CCL_CU_ON_CHP: |
| 653 | case CCL_IOP_CHP: |
| 654 | chpid_parm = (void *)&sccl_area->list_parm; |
| 655 | chpid_parm->m = ccl->req.chpid.m; |
| 656 | chpid_parm->cssid = ccl->req.chpid.chp.cssid; |
| 657 | chpid_parm->chpid = ccl->req.chpid.chp.id; |
| 658 | break; |
| 659 | case CCL_CSS_IMG: |
| 660 | case CCL_CSS_IMG_CONF_CHAR: |
| 661 | cssids_parm = (void *)&sccl_area->list_parm; |
| 662 | cssids_parm->f_cssid = ccl->req.cssids.f_cssid; |
| 663 | cssids_parm->l_cssid = ccl->req.cssids.l_cssid; |
| 664 | break; |
| 665 | } |
| 666 | ccode = chsc(sccl_area); |
| 667 | if (ccode != 0) { |
| 668 | ret = -EIO; |
| 669 | goto out_free; |
| 670 | } |
| 671 | if (sccl_area->response.code != 0x0001) { |
| 672 | ret = -EIO; |
| 673 | CHSC_MSG(0, "sccl: response code=%x\n", |
| 674 | sccl_area->response.code); |
| 675 | goto out_free; |
| 676 | } |
| 677 | memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length); |
| 678 | if (copy_to_user(user_ccl, ccl, sizeof(*ccl))) |
| 679 | ret = -EFAULT; |
| 680 | else |
| 681 | ret = 0; |
| 682 | out_free: |
| 683 | kfree(ccl); |
| 684 | free_page((unsigned long)sccl_area); |
| 685 | return ret; |
| 686 | } |
| 687 | |
| 688 | static int chsc_ioctl_chpd(void __user *user_chpd) |
| 689 | { |
| 690 | struct chsc_cpd_info *chpd; |
| 691 | int ret; |
| 692 | |
| 693 | chpd = kzalloc(sizeof(*chpd), GFP_KERNEL); |
| 694 | if (!chpd) |
| 695 | return -ENOMEM; |
| 696 | if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) { |
| 697 | ret = -EFAULT; |
| 698 | goto out_free; |
| 699 | } |
| 700 | ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt, |
| 701 | chpd->rfmt, chpd->c, chpd->m, |
| 702 | &chpd->chpdb); |
| 703 | if (ret) |
| 704 | goto out_free; |
| 705 | if (copy_to_user(user_chpd, chpd, sizeof(*chpd))) |
| 706 | ret = -EFAULT; |
| 707 | out_free: |
| 708 | kfree(chpd); |
| 709 | return ret; |
| 710 | } |
| 711 | |
| 712 | static int chsc_ioctl_dcal(void __user *user_dcal) |
| 713 | { |
| 714 | struct chsc_dcal *dcal; |
| 715 | int ret, ccode; |
| 716 | struct { |
| 717 | struct chsc_header request; |
| 718 | u32 atype : 8; |
| 719 | u32 : 4; |
| 720 | u32 fmt : 4; |
| 721 | u32 : 16; |
| 722 | u32 res0[2]; |
| 723 | u32 list_parm[2]; |
| 724 | u32 res1[2]; |
| 725 | struct chsc_header response; |
| 726 | u8 data[PAGE_SIZE - 36]; |
| 727 | } __attribute__ ((packed)) *sdcal_area; |
| 728 | |
| 729 | sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 730 | if (!sdcal_area) |
| 731 | return -ENOMEM; |
| 732 | dcal = kzalloc(sizeof(*dcal), GFP_KERNEL); |
| 733 | if (!dcal) { |
| 734 | ret = -ENOMEM; |
| 735 | goto out_free; |
| 736 | } |
| 737 | if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) { |
| 738 | ret = -EFAULT; |
| 739 | goto out_free; |
| 740 | } |
| 741 | sdcal_area->request.length = 0x0020; |
| 742 | sdcal_area->request.code = 0x0034; |
| 743 | sdcal_area->atype = dcal->req.atype; |
| 744 | sdcal_area->fmt = dcal->req.fmt; |
| 745 | memcpy(&sdcal_area->list_parm, &dcal->req.list_parm, |
| 746 | sizeof(sdcal_area->list_parm)); |
| 747 | |
| 748 | ccode = chsc(sdcal_area); |
| 749 | if (ccode != 0) { |
| 750 | ret = -EIO; |
| 751 | goto out_free; |
| 752 | } |
| 753 | if (sdcal_area->response.code != 0x0001) { |
| 754 | ret = -EIO; |
| 755 | CHSC_MSG(0, "sdcal: response code=%x\n", |
| 756 | sdcal_area->response.code); |
| 757 | goto out_free; |
| 758 | } |
| 759 | memcpy(&dcal->sdcal, &sdcal_area->response, |
| 760 | sdcal_area->response.length); |
| 761 | if (copy_to_user(user_dcal, dcal, sizeof(*dcal))) |
| 762 | ret = -EFAULT; |
| 763 | else |
| 764 | ret = 0; |
| 765 | out_free: |
| 766 | kfree(dcal); |
| 767 | free_page((unsigned long)sdcal_area); |
| 768 | return ret; |
| 769 | } |
| 770 | |
| 771 | static long chsc_ioctl(struct file *filp, unsigned int cmd, |
| 772 | unsigned long arg) |
| 773 | { |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 774 | void __user *argp; |
| 775 | |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 776 | CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd); |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 777 | if (is_compat_task()) |
| 778 | argp = compat_ptr(arg); |
| 779 | else |
| 780 | argp = (void __user *)arg; |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 781 | switch (cmd) { |
| 782 | case CHSC_START: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 783 | return chsc_ioctl_start(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 784 | case CHSC_INFO_CHANNEL_PATH: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 785 | return chsc_ioctl_info_channel_path(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 786 | case CHSC_INFO_CU: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 787 | return chsc_ioctl_info_cu(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 788 | case CHSC_INFO_SCH_CU: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 789 | return chsc_ioctl_info_sch_cu(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 790 | case CHSC_INFO_CI: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 791 | return chsc_ioctl_conf_info(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 792 | case CHSC_INFO_CCL: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 793 | return chsc_ioctl_conf_comp_list(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 794 | case CHSC_INFO_CPD: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 795 | return chsc_ioctl_chpd(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 796 | case CHSC_INFO_DCAL: |
Heiko Carstens | 44ee6a8 | 2010-01-13 20:44:30 +0100 | [diff] [blame] | 797 | return chsc_ioctl_dcal(argp); |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 798 | default: /* unknown ioctl number */ |
| 799 | return -ENOIOCTLCMD; |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | static const struct file_operations chsc_fops = { |
| 804 | .owner = THIS_MODULE, |
| 805 | .unlocked_ioctl = chsc_ioctl, |
| 806 | .compat_ioctl = chsc_ioctl, |
| 807 | }; |
| 808 | |
| 809 | static struct miscdevice chsc_misc_device = { |
| 810 | .minor = MISC_DYNAMIC_MINOR, |
| 811 | .name = "chsc", |
| 812 | .fops = &chsc_fops, |
| 813 | }; |
| 814 | |
| 815 | static int __init chsc_misc_init(void) |
| 816 | { |
| 817 | return misc_register(&chsc_misc_device); |
| 818 | } |
| 819 | |
| 820 | static void chsc_misc_cleanup(void) |
| 821 | { |
| 822 | misc_deregister(&chsc_misc_device); |
| 823 | } |
| 824 | |
| 825 | static int __init chsc_sch_init(void) |
| 826 | { |
| 827 | int ret; |
| 828 | |
| 829 | ret = chsc_init_dbfs(); |
| 830 | if (ret) |
| 831 | return ret; |
| 832 | isc_register(CHSC_SCH_ISC); |
| 833 | ret = chsc_init_sch_driver(); |
| 834 | if (ret) |
| 835 | goto out_dbf; |
| 836 | ret = chsc_misc_init(); |
| 837 | if (ret) |
| 838 | goto out_driver; |
| 839 | return ret; |
| 840 | out_driver: |
| 841 | chsc_cleanup_sch_driver(); |
| 842 | out_dbf: |
| 843 | isc_unregister(CHSC_SCH_ISC); |
| 844 | chsc_remove_dbfs(); |
| 845 | return ret; |
| 846 | } |
| 847 | |
| 848 | static void __exit chsc_sch_exit(void) |
| 849 | { |
| 850 | chsc_misc_cleanup(); |
| 851 | chsc_cleanup_sch_driver(); |
| 852 | isc_unregister(CHSC_SCH_ISC); |
| 853 | chsc_remove_dbfs(); |
| 854 | } |
| 855 | |
| 856 | module_init(chsc_sch_init); |
| 857 | module_exit(chsc_sch_exit); |