Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/s390/cio/chsc.c |
| 3 | * S/390 common I/O routines -- channel subsystem call |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH, |
| 6 | * IBM Corporation |
| 7 | * Author(s): Ingo Adlung (adlung@de.ibm.com) |
Cornelia Huck | 4ce3b30 | 2006-01-14 13:21:04 -0800 | [diff] [blame] | 8 | * Cornelia Huck (cornelia.huck@de.ibm.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * Arnd Bergmann (arndb@de.ibm.com) |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/slab.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/device.h> |
| 16 | |
| 17 | #include <asm/cio.h> |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 18 | #include <asm/chpid.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | #include "css.h" |
| 21 | #include "cio.h" |
| 22 | #include "cio_debug.h" |
| 23 | #include "ioasm.h" |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 24 | #include "chp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "chsc.h" |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | static void *sei_page; |
| 28 | |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 29 | static int chsc_error_from_response(int response) |
| 30 | { |
| 31 | switch (response) { |
| 32 | case 0x0001: |
| 33 | return 0; |
| 34 | case 0x0002: |
| 35 | case 0x0003: |
| 36 | case 0x0006: |
| 37 | case 0x0007: |
| 38 | case 0x0008: |
| 39 | case 0x000a: |
| 40 | return -EINVAL; |
| 41 | case 0x0004: |
| 42 | return -EOPNOTSUPP; |
| 43 | default: |
| 44 | return -EIO; |
| 45 | } |
| 46 | } |
| 47 | |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 48 | struct chsc_ssd_area { |
| 49 | struct chsc_header request; |
| 50 | u16 :10; |
| 51 | u16 ssid:2; |
| 52 | u16 :4; |
| 53 | u16 f_sch; /* first subchannel */ |
| 54 | u16 :16; |
| 55 | u16 l_sch; /* last subchannel */ |
| 56 | u32 :32; |
| 57 | struct chsc_header response; |
| 58 | u32 :32; |
| 59 | u8 sch_valid : 1; |
| 60 | u8 dev_valid : 1; |
| 61 | u8 st : 3; /* subchannel type */ |
| 62 | u8 zeroes : 3; |
| 63 | u8 unit_addr; /* unit address */ |
| 64 | u16 devno; /* device number */ |
| 65 | u8 path_mask; |
| 66 | u8 fla_valid_mask; |
| 67 | u16 sch; /* subchannel */ |
| 68 | u8 chpid[8]; /* chpids 0-7 */ |
| 69 | u16 fla[8]; /* full link addresses 0-7 */ |
| 70 | } __attribute__ ((packed)); |
| 71 | |
| 72 | int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 74 | unsigned long page; |
| 75 | struct chsc_ssd_area *ssd_area; |
| 76 | int ccode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | int ret; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 78 | int i; |
| 79 | int mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 81 | page = get_zeroed_page(GFP_KERNEL | GFP_DMA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | if (!page) |
| 83 | return -ENOMEM; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 84 | ssd_area = (struct chsc_ssd_area *) page; |
| 85 | ssd_area->request.length = 0x0010; |
| 86 | ssd_area->request.code = 0x0004; |
| 87 | ssd_area->ssid = schid.ssid; |
| 88 | ssd_area->f_sch = schid.sch_no; |
| 89 | ssd_area->l_sch = schid.sch_no; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 90 | |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 91 | ccode = chsc(ssd_area); |
| 92 | /* Check response. */ |
| 93 | if (ccode > 0) { |
| 94 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
| 95 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 97 | ret = chsc_error_from_response(ssd_area->response.code); |
| 98 | if (ret != 0) { |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 99 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
| 100 | schid.ssid, schid.sch_no, |
| 101 | ssd_area->response.code); |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 102 | goto out_free; |
| 103 | } |
| 104 | if (!ssd_area->sch_valid) { |
| 105 | ret = -ENODEV; |
| 106 | goto out_free; |
| 107 | } |
| 108 | /* Copy data */ |
| 109 | ret = 0; |
| 110 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); |
Cornelia Huck | b279a4f | 2008-01-26 14:10:45 +0100 | [diff] [blame] | 111 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
| 112 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 113 | goto out_free; |
| 114 | ssd->path_mask = ssd_area->path_mask; |
| 115 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; |
| 116 | for (i = 0; i < 8; i++) { |
| 117 | mask = 0x80 >> i; |
| 118 | if (ssd_area->path_mask & mask) { |
| 119 | chp_id_init(&ssd->chpid[i]); |
| 120 | ssd->chpid[i].id = ssd_area->chpid[i]; |
| 121 | } |
| 122 | if (ssd_area->fla_valid_mask & mask) |
| 123 | ssd->fla[i] = ssd_area->fla[i]; |
| 124 | } |
| 125 | out_free: |
| 126 | free_page(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | return ret; |
| 128 | } |
| 129 | |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 130 | static int check_for_io_on_path(struct subchannel *sch, int mask) |
| 131 | { |
| 132 | int cc; |
| 133 | |
| 134 | cc = stsch(sch->schid, &sch->schib); |
| 135 | if (cc) |
| 136 | return 0; |
| 137 | if (sch->schib.scsw.actl && sch->schib.pmcw.lpum == mask) |
| 138 | return 1; |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | static void terminate_internal_io(struct subchannel *sch) |
| 143 | { |
| 144 | if (cio_clear(sch)) { |
| 145 | /* Recheck device in case clear failed. */ |
| 146 | sch->lpm = 0; |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 147 | if (device_trigger_verify(sch) != 0) |
| 148 | css_schedule_eval(sch->schid); |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 149 | return; |
| 150 | } |
| 151 | /* Request retry of internal operation. */ |
| 152 | device_set_intretry(sch); |
| 153 | /* Call handler. */ |
| 154 | if (sch->driver && sch->driver->termination) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 155 | sch->driver->termination(sch); |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 156 | } |
| 157 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 158 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | { |
| 160 | int j; |
| 161 | int mask; |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 162 | struct chp_id *chpid = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | struct schib schib; |
| 164 | |
Cornelia Huck | 7e8ae7b | 2006-10-06 16:38:29 +0200 | [diff] [blame] | 165 | for (j = 0; j < 8; j++) { |
| 166 | mask = 0x80 >> j; |
| 167 | if ((sch->schib.pmcw.pim & mask) && |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 168 | (sch->schib.pmcw.chpid[j] == chpid->id)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | break; |
Cornelia Huck | 7e8ae7b | 2006-10-06 16:38:29 +0200 | [diff] [blame] | 170 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | if (j >= 8) |
| 172 | return 0; |
| 173 | |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 174 | spin_lock_irq(sch->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Cornelia Huck | a8237fc | 2006-01-06 00:19:21 -0800 | [diff] [blame] | 176 | stsch(sch->schid, &schib); |
Cornelia Huck | b279a4f | 2008-01-26 14:10:45 +0100 | [diff] [blame] | 177 | if (!css_sch_is_valid(&schib)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | goto out_unreg; |
| 179 | memcpy(&sch->schib, &schib, sizeof(struct schib)); |
| 180 | /* Check for single path devices. */ |
| 181 | if (sch->schib.pmcw.pim == 0x80) |
| 182 | goto out_unreg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 184 | if (check_for_io_on_path(sch, mask)) { |
| 185 | if (device_is_online(sch)) |
| 186 | device_kill_io(sch); |
| 187 | else { |
| 188 | terminate_internal_io(sch); |
| 189 | /* Re-start path verification. */ |
| 190 | if (sch->driver && sch->driver->verify) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 191 | sch->driver->verify(sch); |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 192 | } |
| 193 | } else { |
| 194 | /* trigger path verification. */ |
| 195 | if (sch->driver && sch->driver->verify) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 196 | sch->driver->verify(sch); |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 197 | else if (sch->lpm == mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | goto out_unreg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 201 | spin_unlock_irq(sch->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | return 0; |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | out_unreg: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | sch->lpm = 0; |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 206 | spin_unlock_irq(sch->lock); |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 207 | css_schedule_eval(sch->schid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | return 0; |
| 209 | } |
| 210 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 211 | void chsc_chp_offline(struct chp_id chpid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
| 213 | char dbf_txt[15]; |
| 214 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 215 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | CIO_TRACE_EVENT(2, dbf_txt); |
| 217 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 218 | if (chp_get_status(chpid) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | return; |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 220 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &chpid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | } |
| 222 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 223 | static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 225 | struct schib schib; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 226 | /* |
| 227 | * We don't know the device yet, but since a path |
| 228 | * may be available now to the device we'll have |
| 229 | * to do recognition again. |
| 230 | * Since we don't have any idea about which chpid |
| 231 | * that beast may be on we'll have to do a stsch |
| 232 | * on all devices, grr... |
| 233 | */ |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 234 | if (stsch_err(schid, &schib)) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 235 | /* We're through */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 236 | return -ENXIO; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 237 | |
| 238 | /* Put it on the slow path. */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 239 | css_schedule_eval(schid); |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 240 | return 0; |
| 241 | } |
| 242 | |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 243 | struct res_acc_data { |
| 244 | struct chp_id chpid; |
| 245 | u32 fla_mask; |
| 246 | u16 fla; |
| 247 | }; |
| 248 | |
| 249 | static int get_res_chpid_mask(struct chsc_ssd_info *ssd, |
| 250 | struct res_acc_data *data) |
| 251 | { |
| 252 | int i; |
| 253 | int mask; |
| 254 | |
| 255 | for (i = 0; i < 8; i++) { |
| 256 | mask = 0x80 >> i; |
| 257 | if (!(ssd->path_mask & mask)) |
| 258 | continue; |
| 259 | if (!chp_id_is_equal(&ssd->chpid[i], &data->chpid)) |
| 260 | continue; |
| 261 | if ((ssd->fla_valid_mask & mask) && |
| 262 | ((ssd->fla[i] & data->fla_mask) != data->fla)) |
| 263 | continue; |
| 264 | return mask; |
| 265 | } |
| 266 | return 0; |
| 267 | } |
| 268 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 269 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 270 | { |
| 271 | int chp_mask, old_lpm; |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 272 | struct res_acc_data *res_data = data; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 273 | |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 274 | spin_lock_irq(sch->lock); |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 275 | chp_mask = get_res_chpid_mask(&sch->ssd_info, res_data); |
| 276 | if (chp_mask == 0) |
| 277 | goto out; |
| 278 | if (stsch(sch->schid, &sch->schib)) |
| 279 | goto out; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 280 | old_lpm = sch->lpm; |
| 281 | sch->lpm = ((sch->schib.pmcw.pim & |
| 282 | sch->schib.pmcw.pam & |
| 283 | sch->schib.pmcw.pom) |
| 284 | | chp_mask) & sch->opm; |
| 285 | if (!old_lpm && sch->lpm) |
| 286 | device_trigger_reprobe(sch); |
| 287 | else if (sch->driver && sch->driver->verify) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 288 | sch->driver->verify(sch); |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 289 | out: |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 290 | spin_unlock_irq(sch->lock); |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 291 | |
Peter Oberparleiter | dd9963f | 2006-09-20 15:59:54 +0200 | [diff] [blame] | 292 | return 0; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 293 | } |
| 294 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 295 | static void s390_process_res_acc (struct res_acc_data *res_data) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 296 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | char dbf_txt[15]; |
| 298 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 299 | sprintf(dbf_txt, "accpr%x.%02x", res_data->chpid.cssid, |
| 300 | res_data->chpid.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | CIO_TRACE_EVENT( 2, dbf_txt); |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 302 | if (res_data->fla != 0) { |
| 303 | sprintf(dbf_txt, "fla%x", res_data->fla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | CIO_TRACE_EVENT( 2, dbf_txt); |
| 305 | } |
| 306 | |
| 307 | /* |
| 308 | * I/O resources may have become accessible. |
| 309 | * Scan through all subchannels that may be concerned and |
| 310 | * do a validation on those. |
| 311 | * The more information we have (info), the less scanning |
| 312 | * will we have to do. |
| 313 | */ |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 314 | for_each_subchannel_staged(__s390_process_res_acc, |
| 315 | s390_process_res_acc_new_sch, res_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | static int |
| 319 | __get_chpid_from_lir(void *data) |
| 320 | { |
| 321 | struct lir { |
| 322 | u8 iq; |
| 323 | u8 ic; |
| 324 | u16 sci; |
| 325 | /* incident-node descriptor */ |
| 326 | u32 indesc[28]; |
| 327 | /* attached-node descriptor */ |
| 328 | u32 andesc[28]; |
| 329 | /* incident-specific information */ |
| 330 | u32 isinfo[28]; |
Peter Oberparleiter | 0f008aa | 2007-02-05 21:17:40 +0100 | [diff] [blame] | 331 | } __attribute__ ((packed)) *lir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Cornelia Huck | 12975ae | 2006-10-11 15:31:47 +0200 | [diff] [blame] | 333 | lir = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | if (!(lir->iq&0x80)) |
| 335 | /* NULL link incident record */ |
| 336 | return -EINVAL; |
| 337 | if (!(lir->indesc[0]&0xc0000000)) |
| 338 | /* node descriptor not valid */ |
| 339 | return -EINVAL; |
| 340 | if (!(lir->indesc[0]&0x10000000)) |
| 341 | /* don't handle device-type nodes - FIXME */ |
| 342 | return -EINVAL; |
| 343 | /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */ |
| 344 | |
| 345 | return (u16) (lir->indesc[0]&0x000000ff); |
| 346 | } |
| 347 | |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 348 | struct chsc_sei_area { |
| 349 | struct chsc_header request; |
| 350 | u32 reserved1; |
| 351 | u32 reserved2; |
| 352 | u32 reserved3; |
| 353 | struct chsc_header response; |
| 354 | u32 reserved4; |
| 355 | u8 flags; |
| 356 | u8 vf; /* validity flags */ |
| 357 | u8 rs; /* reporting source */ |
| 358 | u8 cc; /* content code */ |
| 359 | u16 fla; /* full link address */ |
| 360 | u16 rsid; /* reporting source id */ |
| 361 | u32 reserved5; |
| 362 | u32 reserved6; |
| 363 | u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */ |
| 364 | /* ccdf has to be big enough for a link-incident record */ |
| 365 | } __attribute__ ((packed)); |
| 366 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 367 | static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 369 | struct chp_id chpid; |
| 370 | int id; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 371 | |
| 372 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", |
| 373 | sei_area->rs, sei_area->rsid); |
| 374 | if (sei_area->rs != 4) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 375 | return; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 376 | id = __get_chpid_from_lir(sei_area->ccdf); |
| 377 | if (id < 0) |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 378 | CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 379 | else { |
| 380 | chp_id_init(&chpid); |
| 381 | chpid.id = id; |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 382 | chsc_chp_offline(chpid); |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 383 | } |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 384 | } |
| 385 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 386 | static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area) |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 387 | { |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 388 | struct res_acc_data res_data; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 389 | struct chp_id chpid; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 390 | int status; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 391 | |
| 392 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " |
| 393 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); |
| 394 | if (sei_area->rs != 4) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 395 | return; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 396 | chp_id_init(&chpid); |
| 397 | chpid.id = sei_area->rsid; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 398 | /* allocate a new channel path structure, if needed */ |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 399 | status = chp_get_status(chpid); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 400 | if (status < 0) |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 401 | chp_new(chpid); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 402 | else if (!status) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 403 | return; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 404 | memset(&res_data, 0, sizeof(struct res_acc_data)); |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 405 | res_data.chpid = chpid; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 406 | if ((sei_area->vf & 0xc0) != 0) { |
| 407 | res_data.fla = sei_area->fla; |
| 408 | if ((sei_area->vf & 0xc0) == 0xc0) |
| 409 | /* full link address */ |
| 410 | res_data.fla_mask = 0xffff; |
| 411 | else |
| 412 | /* link address */ |
| 413 | res_data.fla_mask = 0xff00; |
| 414 | } |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 415 | s390_process_res_acc(&res_data); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 416 | } |
| 417 | |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 418 | struct chp_config_data { |
| 419 | u8 map[32]; |
| 420 | u8 op; |
| 421 | u8 pc; |
| 422 | }; |
| 423 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 424 | static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area) |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 425 | { |
| 426 | struct chp_config_data *data; |
| 427 | struct chp_id chpid; |
| 428 | int num; |
| 429 | |
| 430 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); |
| 431 | if (sei_area->rs != 0) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 432 | return; |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 433 | data = (struct chp_config_data *) &(sei_area->ccdf); |
| 434 | chp_id_init(&chpid); |
| 435 | for (num = 0; num <= __MAX_CHPID; num++) { |
| 436 | if (!chp_test_bit(data->map, num)) |
| 437 | continue; |
| 438 | chpid.id = num; |
| 439 | printk(KERN_WARNING "cio: processing configure event %d for " |
| 440 | "chpid %x.%02x\n", data->op, chpid.cssid, chpid.id); |
| 441 | switch (data->op) { |
| 442 | case 0: |
| 443 | chp_cfg_schedule(chpid, 1); |
| 444 | break; |
| 445 | case 1: |
| 446 | chp_cfg_schedule(chpid, 0); |
| 447 | break; |
| 448 | case 2: |
| 449 | chp_cfg_cancel_deconfigure(chpid); |
| 450 | break; |
| 451 | } |
| 452 | } |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 453 | } |
| 454 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 455 | static void chsc_process_sei(struct chsc_sei_area *sei_area) |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 456 | { |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 457 | /* Check if we might have lost some information. */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 458 | if (sei_area->flags & 0x40) { |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 459 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 460 | css_schedule_eval_all(); |
| 461 | } |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 462 | /* which kind of information was stored? */ |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 463 | switch (sei_area->cc) { |
| 464 | case 1: /* link incident*/ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 465 | chsc_process_sei_link_incident(sei_area); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 466 | break; |
| 467 | case 2: /* i/o resource accessibiliy */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 468 | chsc_process_sei_res_acc(sei_area); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 469 | break; |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 470 | case 8: /* channel-path-configuration notification */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 471 | chsc_process_sei_chp_config(sei_area); |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 472 | break; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 473 | default: /* other stuff */ |
| 474 | CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n", |
| 475 | sei_area->cc); |
| 476 | break; |
| 477 | } |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 478 | } |
| 479 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 480 | void chsc_process_crw(void) |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 481 | { |
| 482 | struct chsc_sei_area *sei_area; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | |
| 484 | if (!sei_page) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 485 | return; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 486 | /* Access to sei_page is serialized through machine check handler |
| 487 | * thread, so no need for locking. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | sei_area = sei_page; |
| 489 | |
| 490 | CIO_TRACE_EVENT( 2, "prcss"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | memset(sei_area, 0, sizeof(*sei_area)); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 493 | sei_area->request.length = 0x0010; |
| 494 | sei_area->request.code = 0x000e; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 495 | if (chsc(sei_area)) |
| 496 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 498 | if (sei_area->response.code == 0x0001) { |
| 499 | CIO_CRW_EVENT(4, "chsc: sei successful\n"); |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 500 | chsc_process_sei(sei_area); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 501 | } else { |
| 502 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | sei_area->response.code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | break; |
| 505 | } |
| 506 | } while (sei_area->flags & 0x80); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 509 | static int __chp_add_new_sch(struct subchannel_id schid, void *data) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 510 | { |
| 511 | struct schib schib; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 512 | |
Cornelia Huck | 758976f | 2007-02-05 21:17:36 +0100 | [diff] [blame] | 513 | if (stsch_err(schid, &schib)) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 514 | /* We're through */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 515 | return -ENXIO; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 516 | |
| 517 | /* Put it on the slow path. */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 518 | css_schedule_eval(schid); |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 523 | static int __chp_add(struct subchannel *sch, void *data) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 524 | { |
Cornelia Huck | 7e8ae7b | 2006-10-06 16:38:29 +0200 | [diff] [blame] | 525 | int i, mask; |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 526 | struct chp_id *chpid = data; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 527 | |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 528 | spin_lock_irq(sch->lock); |
Cornelia Huck | 7e8ae7b | 2006-10-06 16:38:29 +0200 | [diff] [blame] | 529 | for (i=0; i<8; i++) { |
| 530 | mask = 0x80 >> i; |
| 531 | if ((sch->schib.pmcw.pim & mask) && |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 532 | (sch->schib.pmcw.chpid[i] == chpid->id)) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 533 | break; |
Cornelia Huck | 7e8ae7b | 2006-10-06 16:38:29 +0200 | [diff] [blame] | 534 | } |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 535 | if (i==8) { |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 536 | spin_unlock_irq(sch->lock); |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 537 | return 0; |
| 538 | } |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 539 | if (stsch(sch->schid, &sch->schib)) { |
| 540 | spin_unlock_irq(sch->lock); |
| 541 | css_schedule_eval(sch->schid); |
| 542 | return 0; |
| 543 | } |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 544 | sch->lpm = ((sch->schib.pmcw.pim & |
| 545 | sch->schib.pmcw.pam & |
| 546 | sch->schib.pmcw.pom) |
Cornelia Huck | 7e8ae7b | 2006-10-06 16:38:29 +0200 | [diff] [blame] | 547 | | mask) & sch->opm; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 548 | |
| 549 | if (sch->driver && sch->driver->verify) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 550 | sch->driver->verify(sch); |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 551 | |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 552 | spin_unlock_irq(sch->lock); |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 553 | |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 554 | return 0; |
| 555 | } |
| 556 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 557 | void chsc_chp_online(struct chp_id chpid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | char dbf_txt[15]; |
| 560 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 561 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | CIO_TRACE_EVENT(2, dbf_txt); |
| 563 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 564 | if (chp_get_status(chpid) != 0) |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 565 | for_each_subchannel_staged(__chp_add, __chp_add_new_sch, |
| 566 | &chpid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | } |
| 568 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 569 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
| 570 | struct chp_id chpid, int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | { |
| 572 | int chp, old_lpm; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 573 | int mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | unsigned long flags; |
| 575 | |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 576 | spin_lock_irqsave(sch->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | old_lpm = sch->lpm; |
| 578 | for (chp = 0; chp < 8; chp++) { |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 579 | mask = 0x80 >> chp; |
| 580 | if (!(sch->ssd_info.path_mask & mask)) |
| 581 | continue; |
| 582 | if (!chp_id_is_equal(&sch->ssd_info.chpid[chp], &chpid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | continue; |
| 584 | |
| 585 | if (on) { |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 586 | sch->opm |= mask; |
| 587 | sch->lpm |= mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | if (!old_lpm) |
| 589 | device_trigger_reprobe(sch); |
| 590 | else if (sch->driver && sch->driver->verify) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 591 | sch->driver->verify(sch); |
Cornelia Huck | 24cb5b4 | 2006-12-04 15:41:01 +0100 | [diff] [blame] | 592 | break; |
| 593 | } |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 594 | sch->opm &= ~mask; |
| 595 | sch->lpm &= ~mask; |
| 596 | if (check_for_io_on_path(sch, mask)) { |
Cornelia Huck | d23861f | 2006-12-04 15:41:04 +0100 | [diff] [blame] | 597 | if (device_is_online(sch)) |
| 598 | /* Path verification is done after killing. */ |
| 599 | device_kill_io(sch); |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 600 | else { |
Cornelia Huck | d23861f | 2006-12-04 15:41:04 +0100 | [diff] [blame] | 601 | /* Kill and retry internal I/O. */ |
| 602 | terminate_internal_io(sch); |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 603 | /* Re-start path verification. */ |
| 604 | if (sch->driver && sch->driver->verify) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 605 | sch->driver->verify(sch); |
Stefan Bader | 387b734 | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 606 | } |
Cornelia Huck | d23861f | 2006-12-04 15:41:04 +0100 | [diff] [blame] | 607 | } else if (!sch->lpm) { |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 608 | if (device_trigger_verify(sch) != 0) |
| 609 | css_schedule_eval(sch->schid); |
Cornelia Huck | 24cb5b4 | 2006-12-04 15:41:01 +0100 | [diff] [blame] | 610 | } else if (sch->driver && sch->driver->verify) |
Cornelia Huck | 602b20f | 2008-01-26 14:10:39 +0100 | [diff] [blame] | 611 | sch->driver->verify(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | break; |
| 613 | } |
Cornelia Huck | 2ec2298 | 2006-12-08 15:54:26 +0100 | [diff] [blame] | 614 | spin_unlock_irqrestore(sch->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 617 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 619 | struct chp_id *chpid = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
| 621 | __s390_subchannel_vary_chpid(sch, *chpid, 0); |
| 622 | return 0; |
| 623 | } |
| 624 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 625 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | { |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 627 | struct chp_id *chpid = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
| 629 | __s390_subchannel_vary_chpid(sch, *chpid, 1); |
| 630 | return 0; |
| 631 | } |
| 632 | |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 633 | static int |
| 634 | __s390_vary_chpid_on(struct subchannel_id schid, void *data) |
| 635 | { |
| 636 | struct schib schib; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 637 | |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 638 | if (stsch_err(schid, &schib)) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 639 | /* We're through */ |
| 640 | return -ENXIO; |
| 641 | /* Put it on the slow path. */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 642 | css_schedule_eval(schid); |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 643 | return 0; |
| 644 | } |
| 645 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 646 | /** |
| 647 | * chsc_chp_vary - propagate channel-path vary operation to subchannels |
| 648 | * @chpid: channl-path ID |
| 649 | * @on: non-zero for vary online, zero for vary offline |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | */ |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 651 | int chsc_chp_vary(struct chp_id chpid, int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | /* |
| 654 | * Redo PathVerification on the devices the chpid connects to |
| 655 | */ |
| 656 | |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 657 | if (on) |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 658 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
| 659 | __s390_vary_chpid_on, &chpid); |
| 660 | else |
| 661 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
| 662 | NULL, &chpid); |
| 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | return 0; |
| 665 | } |
| 666 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 667 | static void |
| 668 | chsc_remove_cmg_attr(struct channel_subsystem *css) |
| 669 | { |
| 670 | int i; |
| 671 | |
| 672 | for (i = 0; i <= __MAX_CHPID; i++) { |
| 673 | if (!css->chps[i]) |
| 674 | continue; |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 675 | chp_remove_cmg_attr(css->chps[i]); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 676 | } |
| 677 | } |
| 678 | |
| 679 | static int |
| 680 | chsc_add_cmg_attr(struct channel_subsystem *css) |
| 681 | { |
| 682 | int i, ret; |
| 683 | |
| 684 | ret = 0; |
| 685 | for (i = 0; i <= __MAX_CHPID; i++) { |
| 686 | if (!css->chps[i]) |
| 687 | continue; |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 688 | ret = chp_add_cmg_attr(css->chps[i]); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 689 | if (ret) |
| 690 | goto cleanup; |
| 691 | } |
| 692 | return ret; |
| 693 | cleanup: |
| 694 | for (--i; i >= 0; i--) { |
| 695 | if (!css->chps[i]) |
| 696 | continue; |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 697 | chp_remove_cmg_attr(css->chps[i]); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 698 | } |
| 699 | return ret; |
| 700 | } |
| 701 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 702 | static int |
| 703 | __chsc_do_secm(struct channel_subsystem *css, int enable, void *page) |
| 704 | { |
| 705 | struct { |
| 706 | struct chsc_header request; |
| 707 | u32 operation_code : 2; |
| 708 | u32 : 30; |
| 709 | u32 key : 4; |
| 710 | u32 : 28; |
| 711 | u32 zeroes1; |
| 712 | u32 cub_addr1; |
| 713 | u32 zeroes2; |
| 714 | u32 cub_addr2; |
| 715 | u32 reserved[13]; |
| 716 | struct chsc_header response; |
| 717 | u32 status : 8; |
| 718 | u32 : 4; |
| 719 | u32 fmt : 4; |
| 720 | u32 : 16; |
Peter Oberparleiter | 0f008aa | 2007-02-05 21:17:40 +0100 | [diff] [blame] | 721 | } __attribute__ ((packed)) *secm_area; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 722 | int ret, ccode; |
| 723 | |
| 724 | secm_area = page; |
| 725 | secm_area->request.length = 0x0050; |
| 726 | secm_area->request.code = 0x0016; |
| 727 | |
| 728 | secm_area->key = PAGE_DEFAULT_KEY; |
| 729 | secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; |
| 730 | secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; |
| 731 | |
| 732 | secm_area->operation_code = enable ? 0 : 1; |
| 733 | |
| 734 | ccode = chsc(secm_area); |
| 735 | if (ccode > 0) |
| 736 | return (ccode == 3) ? -ENODEV : -EBUSY; |
| 737 | |
| 738 | switch (secm_area->response.code) { |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 739 | case 0x0102: |
| 740 | case 0x0103: |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 741 | ret = -EINVAL; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 742 | default: |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 743 | ret = chsc_error_from_response(secm_area->response.code); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 744 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 745 | if (ret != 0) |
| 746 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", |
| 747 | secm_area->response.code); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 748 | return ret; |
| 749 | } |
| 750 | |
| 751 | int |
| 752 | chsc_secm(struct channel_subsystem *css, int enable) |
| 753 | { |
| 754 | void *secm_area; |
| 755 | int ret; |
| 756 | |
| 757 | secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 758 | if (!secm_area) |
| 759 | return -ENOMEM; |
| 760 | |
| 761 | mutex_lock(&css->mutex); |
| 762 | if (enable && !css->cm_enabled) { |
| 763 | css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 764 | css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 765 | if (!css->cub_addr1 || !css->cub_addr2) { |
| 766 | free_page((unsigned long)css->cub_addr1); |
| 767 | free_page((unsigned long)css->cub_addr2); |
| 768 | free_page((unsigned long)secm_area); |
| 769 | mutex_unlock(&css->mutex); |
| 770 | return -ENOMEM; |
| 771 | } |
| 772 | } |
| 773 | ret = __chsc_do_secm(css, enable, secm_area); |
| 774 | if (!ret) { |
| 775 | css->cm_enabled = enable; |
| 776 | if (css->cm_enabled) { |
| 777 | ret = chsc_add_cmg_attr(css); |
| 778 | if (ret) { |
| 779 | memset(secm_area, 0, PAGE_SIZE); |
| 780 | __chsc_do_secm(css, 0, secm_area); |
| 781 | css->cm_enabled = 0; |
| 782 | } |
| 783 | } else |
| 784 | chsc_remove_cmg_attr(css); |
| 785 | } |
Cornelia Huck | 8c4941c | 2007-04-27 16:01:38 +0200 | [diff] [blame] | 786 | if (!css->cm_enabled) { |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 787 | free_page((unsigned long)css->cub_addr1); |
| 788 | free_page((unsigned long)css->cub_addr2); |
| 789 | } |
| 790 | mutex_unlock(&css->mutex); |
| 791 | free_page((unsigned long)secm_area); |
| 792 | return ret; |
| 793 | } |
| 794 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 795 | int chsc_determine_channel_path_description(struct chp_id chpid, |
| 796 | struct channel_path_desc *desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | { |
| 798 | int ccode, ret; |
| 799 | |
| 800 | struct { |
| 801 | struct chsc_header request; |
| 802 | u32 : 24; |
| 803 | u32 first_chpid : 8; |
| 804 | u32 : 24; |
| 805 | u32 last_chpid : 8; |
| 806 | u32 zeroes1; |
| 807 | struct chsc_header response; |
| 808 | u32 zeroes2; |
| 809 | struct channel_path_desc desc; |
Peter Oberparleiter | 0f008aa | 2007-02-05 21:17:40 +0100 | [diff] [blame] | 810 | } __attribute__ ((packed)) *scpd_area; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
| 812 | scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 813 | if (!scpd_area) |
| 814 | return -ENOMEM; |
| 815 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 816 | scpd_area->request.length = 0x0010; |
| 817 | scpd_area->request.code = 0x0002; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 819 | scpd_area->first_chpid = chpid.id; |
| 820 | scpd_area->last_chpid = chpid.id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | ccode = chsc(scpd_area); |
| 823 | if (ccode > 0) { |
| 824 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
| 825 | goto out; |
| 826 | } |
| 827 | |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 828 | ret = chsc_error_from_response(scpd_area->response.code); |
| 829 | if (ret == 0) |
| 830 | /* Success. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | memcpy(desc, &scpd_area->desc, |
| 832 | sizeof(struct channel_path_desc)); |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 833 | else |
| 834 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | scpd_area->response.code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | out: |
| 837 | free_page((unsigned long)scpd_area); |
| 838 | return ret; |
| 839 | } |
| 840 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 841 | static void |
| 842 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, |
| 843 | struct cmg_chars *chars) |
| 844 | { |
| 845 | switch (chp->cmg) { |
| 846 | case 2: |
| 847 | case 3: |
| 848 | chp->cmg_chars = kmalloc(sizeof(struct cmg_chars), |
| 849 | GFP_KERNEL); |
| 850 | if (chp->cmg_chars) { |
| 851 | int i, mask; |
| 852 | struct cmg_chars *cmg_chars; |
| 853 | |
| 854 | cmg_chars = chp->cmg_chars; |
| 855 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { |
| 856 | mask = 0x80 >> (i + 3); |
| 857 | if (cmcv & mask) |
| 858 | cmg_chars->values[i] = chars->values[i]; |
| 859 | else |
| 860 | cmg_chars->values[i] = 0; |
| 861 | } |
| 862 | } |
| 863 | break; |
| 864 | default: |
| 865 | /* No cmg-dependent data. */ |
| 866 | break; |
| 867 | } |
| 868 | } |
| 869 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 870 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 871 | { |
| 872 | int ccode, ret; |
| 873 | |
| 874 | struct { |
| 875 | struct chsc_header request; |
| 876 | u32 : 24; |
| 877 | u32 first_chpid : 8; |
| 878 | u32 : 24; |
| 879 | u32 last_chpid : 8; |
| 880 | u32 zeroes1; |
| 881 | struct chsc_header response; |
| 882 | u32 zeroes2; |
| 883 | u32 not_valid : 1; |
| 884 | u32 shared : 1; |
| 885 | u32 : 22; |
| 886 | u32 chpid : 8; |
| 887 | u32 cmcv : 5; |
| 888 | u32 : 11; |
| 889 | u32 cmgq : 8; |
| 890 | u32 cmg : 8; |
| 891 | u32 zeroes3; |
| 892 | u32 data[NR_MEASUREMENT_CHARS]; |
Peter Oberparleiter | 0f008aa | 2007-02-05 21:17:40 +0100 | [diff] [blame] | 893 | } __attribute__ ((packed)) *scmc_area; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 894 | |
| 895 | scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 896 | if (!scmc_area) |
| 897 | return -ENOMEM; |
| 898 | |
| 899 | scmc_area->request.length = 0x0010; |
| 900 | scmc_area->request.code = 0x0022; |
| 901 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 902 | scmc_area->first_chpid = chp->chpid.id; |
| 903 | scmc_area->last_chpid = chp->chpid.id; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 904 | |
| 905 | ccode = chsc(scmc_area); |
| 906 | if (ccode > 0) { |
| 907 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
| 908 | goto out; |
| 909 | } |
| 910 | |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 911 | ret = chsc_error_from_response(scmc_area->response.code); |
| 912 | if (ret == 0) { |
| 913 | /* Success. */ |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 914 | if (!scmc_area->not_valid) { |
| 915 | chp->cmg = scmc_area->cmg; |
| 916 | chp->shared = scmc_area->shared; |
| 917 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, |
| 918 | (struct cmg_chars *) |
| 919 | &scmc_area->data); |
| 920 | } else { |
| 921 | chp->cmg = -1; |
| 922 | chp->shared = -1; |
| 923 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 924 | } else { |
| 925 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 926 | scmc_area->response.code); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 927 | } |
| 928 | out: |
| 929 | free_page((unsigned long)scmc_area); |
| 930 | return ret; |
| 931 | } |
| 932 | |
Cornelia Huck | 4434a38 | 2007-07-27 12:29:21 +0200 | [diff] [blame] | 933 | int __init chsc_alloc_sei_area(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | { |
| 935 | sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 936 | if (!sei_page) |
Cornelia Huck | e556bbb | 2007-07-27 12:29:19 +0200 | [diff] [blame] | 937 | CIO_MSG_EVENT(0, "Can't allocate page for processing of " |
| 938 | "chsc machine checks!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | return (sei_page ? 0 : -ENOMEM); |
| 940 | } |
| 941 | |
Cornelia Huck | 4434a38 | 2007-07-27 12:29:21 +0200 | [diff] [blame] | 942 | void __init chsc_free_sei_area(void) |
| 943 | { |
| 944 | kfree(sei_page); |
| 945 | } |
| 946 | |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 947 | int __init |
| 948 | chsc_enable_facility(int operation_code) |
| 949 | { |
| 950 | int ret; |
| 951 | struct { |
| 952 | struct chsc_header request; |
| 953 | u8 reserved1:4; |
| 954 | u8 format:4; |
| 955 | u8 reserved2; |
| 956 | u16 operation_code; |
| 957 | u32 reserved3; |
| 958 | u32 reserved4; |
| 959 | u32 operation_data_area[252]; |
| 960 | struct chsc_header response; |
| 961 | u32 reserved5:4; |
| 962 | u32 format2:4; |
| 963 | u32 reserved6:24; |
Peter Oberparleiter | 0f008aa | 2007-02-05 21:17:40 +0100 | [diff] [blame] | 964 | } __attribute__ ((packed)) *sda_area; |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 965 | |
| 966 | sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA); |
| 967 | if (!sda_area) |
| 968 | return -ENOMEM; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 969 | sda_area->request.length = 0x0400; |
| 970 | sda_area->request.code = 0x0031; |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 971 | sda_area->operation_code = operation_code; |
| 972 | |
| 973 | ret = chsc(sda_area); |
| 974 | if (ret > 0) { |
| 975 | ret = (ret == 3) ? -ENODEV : -EBUSY; |
| 976 | goto out; |
| 977 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 978 | |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 979 | switch (sda_area->response.code) { |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 980 | case 0x0101: |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 981 | ret = -EOPNOTSUPP; |
| 982 | break; |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 983 | default: |
| 984 | ret = chsc_error_from_response(sda_area->response.code); |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 985 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 986 | if (ret != 0) |
| 987 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", |
| 988 | operation_code, sda_area->response.code); |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 989 | out: |
| 990 | free_page((unsigned long)sda_area); |
| 991 | return ret; |
| 992 | } |
| 993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | struct css_general_char css_general_characteristics; |
| 995 | struct css_chsc_char css_chsc_characteristics; |
| 996 | |
| 997 | int __init |
| 998 | chsc_determine_css_characteristics(void) |
| 999 | { |
| 1000 | int result; |
| 1001 | struct { |
| 1002 | struct chsc_header request; |
| 1003 | u32 reserved1; |
| 1004 | u32 reserved2; |
| 1005 | u32 reserved3; |
| 1006 | struct chsc_header response; |
| 1007 | u32 reserved4; |
| 1008 | u32 general_char[510]; |
| 1009 | u32 chsc_char[518]; |
Peter Oberparleiter | 0f008aa | 2007-02-05 21:17:40 +0100 | [diff] [blame] | 1010 | } __attribute__ ((packed)) *scsc_area; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
| 1012 | scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 1013 | if (!scsc_area) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1016 | scsc_area->request.length = 0x0010; |
| 1017 | scsc_area->request.code = 0x0010; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
| 1019 | result = chsc(scsc_area); |
| 1020 | if (result) { |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 1021 | result = (result == 3) ? -ENODEV : -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | goto exit; |
| 1023 | } |
| 1024 | |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame^] | 1025 | result = chsc_error_from_response(scsc_area->response.code); |
| 1026 | if (result == 0) { |
| 1027 | memcpy(&css_general_characteristics, scsc_area->general_char, |
| 1028 | sizeof(css_general_characteristics)); |
| 1029 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, |
| 1030 | sizeof(css_chsc_characteristics)); |
| 1031 | } else |
| 1032 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", |
| 1033 | scsc_area->response.code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | exit: |
| 1035 | free_page ((unsigned long) scsc_area); |
| 1036 | return result; |
| 1037 | } |
| 1038 | |
| 1039 | EXPORT_SYMBOL_GPL(css_general_characteristics); |
| 1040 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); |