Greg Kroah-Hartman | 724117b | 2017-11-14 18:38:02 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * S/390 common I/O routines -- channel subsystem call |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 5 | * Copyright IBM Corp. 1999,2012 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Author(s): Ingo Adlung (adlung@de.ibm.com) |
Cornelia Huck | 4ce3b30 | 2006-01-14 13:21:04 -0800 | [diff] [blame] | 7 | * Cornelia Huck (cornelia.huck@de.ibm.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Arnd Bergmann (arndb@de.ibm.com) |
| 9 | */ |
| 10 | |
Michael Ernst | e6d5a42 | 2008-12-25 13:39:36 +0100 | [diff] [blame] | 11 | #define KMSG_COMPONENT "cio" |
| 12 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/slab.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/device.h> |
Sebastian Ott | 9f3d6d7 | 2016-01-25 10:32:51 +0100 | [diff] [blame] | 18 | #include <linux/mutex.h> |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 19 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
| 21 | #include <asm/cio.h> |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 22 | #include <asm/chpid.h> |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 23 | #include <asm/chsc.h> |
Heiko Carstens | f5daba1 | 2009-03-26 15:24:01 +0100 | [diff] [blame] | 24 | #include <asm/crw.h> |
Sebastian Ott | ca4ba15 | 2013-06-05 18:59:22 +0200 | [diff] [blame] | 25 | #include <asm/isc.h> |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 26 | #include <asm/ebcdic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
| 28 | #include "css.h" |
| 29 | #include "cio.h" |
| 30 | #include "cio_debug.h" |
| 31 | #include "ioasm.h" |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 32 | #include "chp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "chsc.h" |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | static void *sei_page; |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 36 | static void *chsc_page; |
| 37 | static DEFINE_SPINLOCK(chsc_page_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 39 | #define SEI_VF_FLA 0xc0 /* VF flag for Full Link Address */ |
| 40 | #define SEI_RS_CHPID 0x4 /* 4 in RS field indicates CHPID */ |
| 41 | |
Holger Dengler | 2a483d3 | 2024-02-19 17:32:54 +0100 | [diff] [blame] | 42 | static BLOCKING_NOTIFIER_HEAD(chsc_notifiers); |
| 43 | |
| 44 | int chsc_notifier_register(struct notifier_block *nb) |
| 45 | { |
| 46 | return blocking_notifier_chain_register(&chsc_notifiers, nb); |
| 47 | } |
| 48 | EXPORT_SYMBOL(chsc_notifier_register); |
| 49 | |
| 50 | int chsc_notifier_unregister(struct notifier_block *nb) |
| 51 | { |
| 52 | return blocking_notifier_chain_unregister(&chsc_notifiers, nb); |
| 53 | } |
| 54 | EXPORT_SYMBOL(chsc_notifier_unregister); |
| 55 | |
Cornelia Huck | dae3984 | 2008-07-17 17:16:47 +0200 | [diff] [blame] | 56 | /** |
| 57 | * chsc_error_from_response() - convert a chsc response to an error |
| 58 | * @response: chsc response code |
| 59 | * |
| 60 | * Returns an appropriate Linux error code for @response. |
| 61 | */ |
| 62 | int chsc_error_from_response(int response) |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 63 | { |
| 64 | switch (response) { |
| 65 | case 0x0001: |
| 66 | return 0; |
| 67 | case 0x0002: |
| 68 | case 0x0003: |
| 69 | case 0x0006: |
| 70 | case 0x0007: |
| 71 | case 0x0008: |
| 72 | case 0x000a: |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 73 | case 0x0104: |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 74 | return -EINVAL; |
| 75 | case 0x0004: |
Alexandra Winter | a0138f5 | 2020-04-16 15:08:41 +0200 | [diff] [blame] | 76 | case 0x0106: /* "Wrong Channel Parm" for the op 0x003d */ |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 77 | return -EOPNOTSUPP; |
Sebastian Ott | 184b08a | 2012-08-28 16:45:42 +0200 | [diff] [blame] | 78 | case 0x000b: |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 79 | case 0x0107: /* "Channel busy" for the op 0x003d */ |
Sebastian Ott | 184b08a | 2012-08-28 16:45:42 +0200 | [diff] [blame] | 80 | return -EBUSY; |
| 81 | case 0x0100: |
| 82 | case 0x0102: |
| 83 | return -ENOMEM; |
Alexandra Winter | 4fea49a | 2020-09-10 19:23:44 +0200 | [diff] [blame] | 84 | case 0x0108: /* "HW limit exceeded" for the op 0x003d */ |
| 85 | return -EUSERS; |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 86 | default: |
| 87 | return -EIO; |
| 88 | } |
| 89 | } |
Cornelia Huck | dae3984 | 2008-07-17 17:16:47 +0200 | [diff] [blame] | 90 | EXPORT_SYMBOL_GPL(chsc_error_from_response); |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 91 | |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 92 | struct chsc_ssd_area { |
| 93 | struct chsc_header request; |
| 94 | u16 :10; |
| 95 | u16 ssid:2; |
| 96 | u16 :4; |
| 97 | u16 f_sch; /* first subchannel */ |
| 98 | u16 :16; |
| 99 | u16 l_sch; /* last subchannel */ |
| 100 | u32 :32; |
| 101 | struct chsc_header response; |
| 102 | u32 :32; |
| 103 | u8 sch_valid : 1; |
| 104 | u8 dev_valid : 1; |
| 105 | u8 st : 3; /* subchannel type */ |
| 106 | u8 zeroes : 3; |
| 107 | u8 unit_addr; /* unit address */ |
| 108 | u16 devno; /* device number */ |
| 109 | u8 path_mask; |
| 110 | u8 fla_valid_mask; |
| 111 | u16 sch; /* subchannel */ |
| 112 | u8 chpid[8]; /* chpids 0-7 */ |
| 113 | u16 fla[8]; /* full link addresses 0-7 */ |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 114 | } __packed __aligned(PAGE_SIZE); |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 115 | |
| 116 | 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] | 117 | { |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 118 | struct chsc_ssd_area *ssd_area; |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 119 | unsigned long flags; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 120 | int ccode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | int ret; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 122 | int i; |
| 123 | int mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 125 | spin_lock_irqsave(&chsc_page_lock, flags); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 126 | memset(chsc_page, 0, PAGE_SIZE); |
| 127 | ssd_area = chsc_page; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 128 | ssd_area->request.length = 0x0010; |
| 129 | ssd_area->request.code = 0x0004; |
| 130 | ssd_area->ssid = schid.ssid; |
| 131 | ssd_area->f_sch = schid.sch_no; |
| 132 | ssd_area->l_sch = schid.sch_no; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 133 | |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 134 | ccode = chsc(ssd_area); |
| 135 | /* Check response. */ |
| 136 | if (ccode > 0) { |
| 137 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 138 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 140 | ret = chsc_error_from_response(ssd_area->response.code); |
| 141 | if (ret != 0) { |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 142 | CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", |
| 143 | schid.ssid, schid.sch_no, |
| 144 | ssd_area->response.code); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 145 | goto out; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 146 | } |
| 147 | if (!ssd_area->sch_valid) { |
| 148 | ret = -ENODEV; |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 149 | goto out; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 150 | } |
| 151 | /* Copy data */ |
| 152 | ret = 0; |
| 153 | memset(ssd, 0, sizeof(struct chsc_ssd_info)); |
Cornelia Huck | b279a4f | 2008-01-26 14:10:45 +0100 | [diff] [blame] | 154 | if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && |
| 155 | (ssd_area->st != SUBCHANNEL_TYPE_MSG)) |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 156 | goto out; |
Peter Oberparleiter | 7ad6a24 | 2007-04-27 16:01:35 +0200 | [diff] [blame] | 157 | ssd->path_mask = ssd_area->path_mask; |
| 158 | ssd->fla_valid_mask = ssd_area->fla_valid_mask; |
| 159 | for (i = 0; i < 8; i++) { |
| 160 | mask = 0x80 >> i; |
| 161 | if (ssd_area->path_mask & mask) { |
| 162 | chp_id_init(&ssd->chpid[i]); |
| 163 | ssd->chpid[i].id = ssd_area->chpid[i]; |
| 164 | } |
| 165 | if (ssd_area->fla_valid_mask & mask) |
| 166 | ssd->fla[i] = ssd_area->fla[i]; |
| 167 | } |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 168 | out: |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 169 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | return ret; |
| 171 | } |
| 172 | |
Sebastian Ott | da5b6cb | 2013-06-05 18:58:35 +0200 | [diff] [blame] | 173 | /** |
| 174 | * chsc_ssqd() - store subchannel QDIO data (SSQD) |
| 175 | * @schid: id of the subchannel on which SSQD is performed |
| 176 | * @ssqd: request and response block for SSQD |
| 177 | * |
| 178 | * Returns 0 on success. |
| 179 | */ |
| 180 | int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) |
| 181 | { |
| 182 | memset(ssqd, 0, sizeof(*ssqd)); |
| 183 | ssqd->request.length = 0x0010; |
| 184 | ssqd->request.code = 0x0024; |
| 185 | ssqd->first_sch = schid.sch_no; |
| 186 | ssqd->last_sch = schid.sch_no; |
| 187 | ssqd->ssid = schid.ssid; |
| 188 | |
| 189 | if (chsc(ssqd)) |
| 190 | return -EIO; |
| 191 | |
| 192 | return chsc_error_from_response(ssqd->response.code); |
| 193 | } |
| 194 | EXPORT_SYMBOL_GPL(chsc_ssqd); |
| 195 | |
Sebastian Ott | ca4ba15 | 2013-06-05 18:59:22 +0200 | [diff] [blame] | 196 | /** |
| 197 | * chsc_sadc() - set adapter device controls (SADC) |
| 198 | * @schid: id of the subchannel on which SADC is performed |
| 199 | * @scssc: request and response block for SADC |
| 200 | * @summary_indicator_addr: summary indicator address |
| 201 | * @subchannel_indicator_addr: subchannel indicator address |
Julian Wiedmann | 9289224 | 2020-03-16 09:20:38 +0100 | [diff] [blame] | 202 | * @isc: Interruption Subclass for this subchannel |
Sebastian Ott | ca4ba15 | 2013-06-05 18:59:22 +0200 | [diff] [blame] | 203 | * |
| 204 | * Returns 0 on success. |
| 205 | */ |
| 206 | int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc, |
Heiko Carstens | 9ff91a3 | 2024-03-07 13:28:15 +0100 | [diff] [blame] | 207 | dma64_t summary_indicator_addr, dma64_t subchannel_indicator_addr, u8 isc) |
Sebastian Ott | ca4ba15 | 2013-06-05 18:59:22 +0200 | [diff] [blame] | 208 | { |
| 209 | memset(scssc, 0, sizeof(*scssc)); |
| 210 | scssc->request.length = 0x0fe0; |
| 211 | scssc->request.code = 0x0021; |
| 212 | scssc->operation_code = 0; |
| 213 | |
| 214 | scssc->summary_indicator_addr = summary_indicator_addr; |
| 215 | scssc->subchannel_indicator_addr = subchannel_indicator_addr; |
| 216 | |
| 217 | scssc->ks = PAGE_DEFAULT_KEY >> 4; |
| 218 | scssc->kc = PAGE_DEFAULT_KEY >> 4; |
Julian Wiedmann | 9289224 | 2020-03-16 09:20:38 +0100 | [diff] [blame] | 219 | scssc->isc = isc; |
Sebastian Ott | ca4ba15 | 2013-06-05 18:59:22 +0200 | [diff] [blame] | 220 | scssc->schid = schid; |
| 221 | |
| 222 | /* enable the time delay disablement facility */ |
| 223 | if (css_general_characteristics.aif_tdd) |
| 224 | scssc->word_with_d_bit = 0x10000000; |
| 225 | |
| 226 | if (chsc(scssc)) |
| 227 | return -EIO; |
| 228 | |
| 229 | return chsc_error_from_response(scssc->response.code); |
| 230 | } |
| 231 | EXPORT_SYMBOL_GPL(chsc_sadc); |
| 232 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 233 | static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 235 | spin_lock_irq(&sch->lock); |
Cornelia Huck | c820de3 | 2008-07-14 09:58:45 +0200 | [diff] [blame] | 236 | if (sch->driver && sch->driver->chp_event) |
| 237 | if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | goto out_unreg; |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 239 | spin_unlock_irq(&sch->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | return 0; |
Stefan Bader | 387b734f | 2007-04-27 16:01:33 +0200 | [diff] [blame] | 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | out_unreg: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | sch->lpm = 0; |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 244 | spin_unlock_irq(&sch->lock); |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 245 | css_schedule_eval(sch->schid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | return 0; |
| 247 | } |
| 248 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 249 | void chsc_chp_offline(struct chp_id chpid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
Sebastian Ott | 9f3d6d7 | 2016-01-25 10:32:51 +0100 | [diff] [blame] | 251 | struct channel_path *chp = chpid_to_chp(chpid); |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 252 | struct chp_link link; |
Sebastian Ott | 9f3d6d7 | 2016-01-25 10:32:51 +0100 | [diff] [blame] | 253 | char dbf_txt[15]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 255 | sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | CIO_TRACE_EVENT(2, dbf_txt); |
| 257 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 258 | if (chp_get_status(chpid) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | return; |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 260 | memset(&link, 0, sizeof(struct chp_link)); |
| 261 | link.chpid = chpid; |
Cornelia Huck | 22806dc | 2008-04-17 07:45:59 +0200 | [diff] [blame] | 262 | /* Wait until previous actions have settled. */ |
| 263 | css_wait_for_slow_path(); |
Sebastian Ott | 9f3d6d7 | 2016-01-25 10:32:51 +0100 | [diff] [blame] | 264 | |
| 265 | mutex_lock(&chp->lock); |
| 266 | chp_update_desc(chp); |
| 267 | mutex_unlock(&chp->lock); |
| 268 | |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 269 | for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 272 | static int __s390_process_res_acc(struct subchannel *sch, void *data) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 273 | { |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 274 | spin_lock_irq(&sch->lock); |
Cornelia Huck | c820de3 | 2008-07-14 09:58:45 +0200 | [diff] [blame] | 275 | if (sch->driver && sch->driver->chp_event) |
| 276 | sch->driver->chp_event(sch, data, CHP_ONLINE); |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 277 | spin_unlock_irq(&sch->lock); |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 278 | |
Peter Oberparleiter | dd9963f | 2006-09-20 15:59:54 +0200 | [diff] [blame] | 279 | return 0; |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 280 | } |
| 281 | |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 282 | static void s390_process_res_acc(struct chp_link *link) |
Cornelia Huck | f97a56f | 2006-01-06 00:19:22 -0800 | [diff] [blame] | 283 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | char dbf_txt[15]; |
| 285 | |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 286 | sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, |
| 287 | link->chpid.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | CIO_TRACE_EVENT( 2, dbf_txt); |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 289 | if (link->fla != 0) { |
| 290 | sprintf(dbf_txt, "fla%x", link->fla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | CIO_TRACE_EVENT( 2, dbf_txt); |
| 292 | } |
Cornelia Huck | 22806dc | 2008-04-17 07:45:59 +0200 | [diff] [blame] | 293 | /* Wait until previous actions have settled. */ |
| 294 | css_wait_for_slow_path(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | /* |
| 296 | * I/O resources may have become accessible. |
| 297 | * Scan through all subchannels that may be concerned and |
| 298 | * do a validation on those. |
| 299 | * The more information we have (info), the less scanning |
| 300 | * will we have to do. |
| 301 | */ |
Peter Oberparleiter | 449666d | 2013-11-26 14:55:56 +0100 | [diff] [blame] | 302 | for_each_subchannel_staged(__s390_process_res_acc, NULL, link); |
| 303 | css_schedule_reprobe(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 306 | static int process_fces_event(struct subchannel *sch, void *data) |
| 307 | { |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 308 | spin_lock_irq(&sch->lock); |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 309 | if (sch->driver && sch->driver->chp_event) |
| 310 | sch->driver->chp_event(sch, data, CHP_FCES_EVENT); |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 311 | spin_unlock_irq(&sch->lock); |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 312 | return 0; |
| 313 | } |
| 314 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 315 | struct chsc_sei_nt0_area { |
| 316 | u8 flags; |
| 317 | u8 vf; /* validity flags */ |
| 318 | u8 rs; /* reporting source */ |
| 319 | u8 cc; /* content code */ |
| 320 | u16 fla; /* full link address */ |
| 321 | u16 rsid; /* reporting source id */ |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 322 | u32 reserved1; |
| 323 | u32 reserved2; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 324 | /* ccdf has to be big enough for a link-incident record */ |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 325 | u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */ |
| 326 | } __packed; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 327 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 328 | struct chsc_sei_nt2_area { |
| 329 | u8 flags; /* p and v bit */ |
| 330 | u8 reserved1; |
| 331 | u8 reserved2; |
| 332 | u8 cc; /* content code */ |
| 333 | u32 reserved3[13]; |
| 334 | u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */ |
| 335 | } __packed; |
| 336 | |
Sebastian Ott | 509d97b | 2013-01-15 19:02:01 +0100 | [diff] [blame] | 337 | #define CHSC_SEI_NT0 (1ULL << 63) |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 338 | #define CHSC_SEI_NT2 (1ULL << 61) |
| 339 | |
| 340 | struct chsc_sei { |
| 341 | struct chsc_header request; |
| 342 | u32 reserved1; |
| 343 | u64 ntsm; /* notification type mask */ |
| 344 | struct chsc_header response; |
Sebastian Ott | 509d97b | 2013-01-15 19:02:01 +0100 | [diff] [blame] | 345 | u32 :24; |
| 346 | u8 nt; |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 347 | union { |
| 348 | struct chsc_sei_nt0_area nt0_area; |
| 349 | struct chsc_sei_nt2_area nt2_area; |
| 350 | u8 nt_area[PAGE_SIZE - 24]; |
| 351 | } u; |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 352 | } __packed __aligned(PAGE_SIZE); |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 353 | |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 354 | /* |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 355 | * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface" |
| 356 | */ |
| 357 | |
| 358 | #define LIR_IQ_CLASS_INFO 0 |
| 359 | #define LIR_IQ_CLASS_DEGRADED 1 |
| 360 | #define LIR_IQ_CLASS_NOT_OPERATIONAL 2 |
| 361 | |
| 362 | struct lir { |
| 363 | struct { |
| 364 | u32 null:1; |
| 365 | u32 reserved:3; |
| 366 | u32 class:2; |
| 367 | u32 reserved2:2; |
| 368 | } __packed iq; |
| 369 | u32 ic:8; |
| 370 | u32 reserved:16; |
| 371 | struct node_descriptor incident_node; |
| 372 | struct node_descriptor attached_node; |
| 373 | u8 reserved2[32]; |
| 374 | } __packed; |
| 375 | |
| 376 | #define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */ |
| 377 | #define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ |
| 378 | |
| 379 | /* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */ |
| 380 | static char *store_ebcdic(char *dest, const char *src, unsigned long len, |
| 381 | char delim) |
| 382 | { |
| 383 | memcpy(dest, src, len); |
| 384 | EBCASC(dest, len); |
| 385 | |
| 386 | if (delim) |
| 387 | dest[len++] = delim; |
| 388 | |
| 389 | return dest + len; |
| 390 | } |
| 391 | |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 392 | static void chsc_link_from_sei(struct chp_link *link, |
| 393 | struct chsc_sei_nt0_area *sei_area) |
| 394 | { |
| 395 | if ((sei_area->vf & SEI_VF_FLA) != 0) { |
| 396 | link->fla = sei_area->fla; |
| 397 | link->fla_mask = ((sei_area->vf & SEI_VF_FLA) == SEI_VF_FLA) ? |
| 398 | 0xffff : 0xff00; |
| 399 | } |
| 400 | } |
| 401 | |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 402 | /* Format node ID and parameters for output in LIR log message. */ |
| 403 | static void format_node_data(char *params, char *id, struct node_descriptor *nd) |
| 404 | { |
| 405 | memset(params, 0, PARAMS_LEN); |
| 406 | memset(id, 0, NODEID_LEN); |
| 407 | |
| 408 | if (nd->validity != ND_VALIDITY_VALID) { |
Justin Stitt | 991a211 | 2023-10-23 19:24:38 +0000 | [diff] [blame] | 409 | strscpy(params, "n/a", PARAMS_LEN); |
| 410 | strscpy(id, "n/a", NODEID_LEN); |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 411 | return; |
| 412 | } |
| 413 | |
| 414 | /* PARAMS=xx,xxxxxx */ |
| 415 | snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params); |
| 416 | /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ |
| 417 | id = store_ebcdic(id, nd->type, sizeof(nd->type), '/'); |
| 418 | id = store_ebcdic(id, nd->model, sizeof(nd->model), ','); |
| 419 | id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.'); |
| 420 | id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0); |
| 421 | id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ','); |
| 422 | sprintf(id, "%04X", nd->tag); |
| 423 | } |
| 424 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 425 | static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | { |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 427 | struct lir *lir = (struct lir *) &sei_area->ccdf; |
| 428 | char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN], |
| 429 | aunodeid[NODEID_LEN]; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 430 | |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 431 | CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n", |
| 432 | sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); |
| 433 | |
| 434 | /* Ignore NULL Link Incident Records. */ |
| 435 | if (lir->iq.null) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 436 | return; |
Peter Oberparleiter | 1d2334c | 2015-07-15 14:04:18 +0200 | [diff] [blame] | 437 | |
| 438 | /* Inform user that a link requires maintenance actions because it has |
| 439 | * become degraded or not operational. Note that this log message is |
| 440 | * the primary intention behind a Link Incident Record. */ |
| 441 | |
| 442 | format_node_data(iuparams, iunodeid, &lir->incident_node); |
| 443 | format_node_data(auparams, aunodeid, &lir->attached_node); |
| 444 | |
| 445 | switch (lir->iq.class) { |
| 446 | case LIR_IQ_CLASS_DEGRADED: |
| 447 | pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x " |
| 448 | "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", |
| 449 | sei_area->rs, sei_area->rsid, lir->ic, iuparams, |
| 450 | iunodeid, auparams, aunodeid); |
| 451 | break; |
| 452 | case LIR_IQ_CLASS_NOT_OPERATIONAL: |
| 453 | pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x " |
| 454 | "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", |
| 455 | sei_area->rs, sei_area->rsid, lir->ic, iuparams, |
| 456 | iunodeid, auparams, aunodeid); |
| 457 | break; |
| 458 | default: |
| 459 | break; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 460 | } |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 461 | } |
| 462 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 463 | static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 464 | { |
Sebastian Ott | af2e460 | 2018-04-11 11:21:17 +0200 | [diff] [blame] | 465 | struct channel_path *chp; |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 466 | struct chp_link link; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 467 | struct chp_id chpid; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 468 | int status; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 469 | |
| 470 | CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " |
| 471 | "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); |
| 472 | if (sei_area->rs != 4) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 473 | return; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 474 | chp_id_init(&chpid); |
| 475 | chpid.id = sei_area->rsid; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 476 | /* allocate a new channel path structure, if needed */ |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 477 | status = chp_get_status(chpid); |
Sebastian Ott | af2e460 | 2018-04-11 11:21:17 +0200 | [diff] [blame] | 478 | if (!status) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 479 | return; |
Sebastian Ott | af2e460 | 2018-04-11 11:21:17 +0200 | [diff] [blame] | 480 | |
| 481 | if (status < 0) { |
| 482 | chp_new(chpid); |
| 483 | } else { |
| 484 | chp = chpid_to_chp(chpid); |
| 485 | mutex_lock(&chp->lock); |
| 486 | chp_update_desc(chp); |
| 487 | mutex_unlock(&chp->lock); |
| 488 | } |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 489 | memset(&link, 0, sizeof(struct chp_link)); |
| 490 | link.chpid = chpid; |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 491 | chsc_link_from_sei(&link, sei_area); |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 492 | s390_process_res_acc(&link); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 493 | } |
| 494 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 495 | static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area) |
Sebastian Ott | fca894ed | 2011-05-23 10:24:41 +0200 | [diff] [blame] | 496 | { |
| 497 | struct channel_path *chp; |
| 498 | struct chp_id chpid; |
| 499 | u8 *data; |
| 500 | int num; |
| 501 | |
| 502 | CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); |
| 503 | if (sei_area->rs != 0) |
| 504 | return; |
| 505 | data = sei_area->ccdf; |
| 506 | chp_id_init(&chpid); |
| 507 | for (num = 0; num <= __MAX_CHPID; num++) { |
| 508 | if (!chp_test_bit(data, num)) |
| 509 | continue; |
| 510 | chpid.id = num; |
| 511 | |
| 512 | CIO_CRW_EVENT(4, "Update information for channel path " |
| 513 | "%x.%02x\n", chpid.cssid, chpid.id); |
| 514 | chp = chpid_to_chp(chpid); |
| 515 | if (!chp) { |
| 516 | chp_new(chpid); |
| 517 | continue; |
| 518 | } |
| 519 | mutex_lock(&chp->lock); |
Peter Oberparleiter | cce0eac | 2013-03-11 12:58:18 +0100 | [diff] [blame] | 520 | chp_update_desc(chp); |
Sebastian Ott | fca894ed | 2011-05-23 10:24:41 +0200 | [diff] [blame] | 521 | mutex_unlock(&chp->lock); |
| 522 | } |
| 523 | } |
| 524 | |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 525 | struct chp_config_data { |
| 526 | u8 map[32]; |
| 527 | u8 op; |
| 528 | u8 pc; |
| 529 | }; |
| 530 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 531 | static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area) |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 532 | { |
| 533 | struct chp_config_data *data; |
| 534 | struct chp_id chpid; |
| 535 | int num; |
Michael Ernst | e6d5a42 | 2008-12-25 13:39:36 +0100 | [diff] [blame] | 536 | char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 537 | |
| 538 | CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); |
| 539 | if (sei_area->rs != 0) |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 540 | return; |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 541 | data = (struct chp_config_data *) &(sei_area->ccdf); |
| 542 | chp_id_init(&chpid); |
| 543 | for (num = 0; num <= __MAX_CHPID; num++) { |
| 544 | if (!chp_test_bit(data->map, num)) |
| 545 | continue; |
| 546 | chpid.id = num; |
Michael Ernst | e6d5a42 | 2008-12-25 13:39:36 +0100 | [diff] [blame] | 547 | pr_notice("Processing %s for channel path %x.%02x\n", |
| 548 | events[data->op], chpid.cssid, chpid.id); |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 549 | switch (data->op) { |
| 550 | case 0: |
| 551 | chp_cfg_schedule(chpid, 1); |
| 552 | break; |
| 553 | case 1: |
| 554 | chp_cfg_schedule(chpid, 0); |
| 555 | break; |
| 556 | case 2: |
| 557 | chp_cfg_cancel_deconfigure(chpid); |
| 558 | break; |
| 559 | } |
| 560 | } |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 561 | } |
| 562 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 563 | static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) |
Sebastian Ott | 40ff4cc | 2012-08-28 16:47:02 +0200 | [diff] [blame] | 564 | { |
| 565 | int ret; |
| 566 | |
| 567 | CIO_CRW_EVENT(4, "chsc: scm change notification\n"); |
| 568 | if (sei_area->rs != 7) |
| 569 | return; |
| 570 | |
| 571 | ret = scm_update_information(); |
| 572 | if (ret) |
| 573 | CIO_CRW_EVENT(0, "chsc: updating change notification" |
| 574 | " failed (rc=%d).\n", ret); |
| 575 | } |
| 576 | |
Sebastian Ott | aebfa66 | 2013-02-28 12:07:55 +0100 | [diff] [blame] | 577 | static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area) |
| 578 | { |
| 579 | int ret; |
| 580 | |
| 581 | CIO_CRW_EVENT(4, "chsc: scm available information\n"); |
| 582 | if (sei_area->rs != 7) |
| 583 | return; |
| 584 | |
| 585 | ret = scm_process_availability_information(); |
| 586 | if (ret) |
| 587 | CIO_CRW_EVENT(0, "chsc: process availability information" |
| 588 | " failed (rc=%d).\n", ret); |
| 589 | } |
| 590 | |
Tony Krowiak | 0d9c038 | 2019-02-18 12:01:35 -0500 | [diff] [blame] | 591 | static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area) |
| 592 | { |
| 593 | CIO_CRW_EVENT(3, "chsc: ap config changed\n"); |
| 594 | if (sei_area->rs != 5) |
| 595 | return; |
| 596 | |
Holger Dengler | 2a483d3 | 2024-02-19 17:32:54 +0100 | [diff] [blame] | 597 | blocking_notifier_call_chain(&chsc_notifiers, |
| 598 | CHSC_NOTIFY_AP_CFG, NULL); |
Tony Krowiak | 0d9c038 | 2019-02-18 12:01:35 -0500 | [diff] [blame] | 599 | } |
| 600 | |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 601 | static void chsc_process_sei_fces_event(struct chsc_sei_nt0_area *sei_area) |
| 602 | { |
| 603 | struct chp_link link; |
| 604 | struct chp_id chpid; |
| 605 | struct channel_path *chp; |
| 606 | |
| 607 | CIO_CRW_EVENT(4, |
| 608 | "chsc: FCES status notification (rs=%02x, rs_id=%04x, FCES-status=%x)\n", |
| 609 | sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); |
| 610 | |
| 611 | if (sei_area->rs != SEI_RS_CHPID) |
| 612 | return; |
| 613 | chp_id_init(&chpid); |
| 614 | chpid.id = sei_area->rsid; |
| 615 | |
| 616 | /* Ignore the event on unknown/invalid chp */ |
| 617 | chp = chpid_to_chp(chpid); |
| 618 | if (!chp) |
| 619 | return; |
| 620 | |
| 621 | memset(&link, 0, sizeof(struct chp_link)); |
| 622 | link.chpid = chpid; |
| 623 | chsc_link_from_sei(&link, sei_area); |
| 624 | |
| 625 | for_each_subchannel_staged(process_fces_event, NULL, &link); |
| 626 | } |
| 627 | |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 628 | static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 629 | { |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 630 | switch (sei_area->cc) { |
| 631 | case 1: |
| 632 | zpci_event_error(sei_area->ccdf); |
| 633 | break; |
| 634 | case 2: |
| 635 | zpci_event_availability(sei_area->ccdf); |
| 636 | break; |
| 637 | default: |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 638 | CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n", |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 639 | sei_area->cc); |
| 640 | break; |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 641 | } |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) |
| 645 | { |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 646 | /* which kind of information was stored? */ |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 647 | switch (sei_area->cc) { |
| 648 | case 1: /* link incident*/ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 649 | chsc_process_sei_link_incident(sei_area); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 650 | break; |
Sebastian Ott | fca894ed | 2011-05-23 10:24:41 +0200 | [diff] [blame] | 651 | case 2: /* i/o resource accessibility */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 652 | chsc_process_sei_res_acc(sei_area); |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 653 | break; |
Tony Krowiak | 0d9c038 | 2019-02-18 12:01:35 -0500 | [diff] [blame] | 654 | case 3: /* ap config changed */ |
| 655 | chsc_process_sei_ap_cfg_chg(sei_area); |
| 656 | break; |
Sebastian Ott | fca894ed | 2011-05-23 10:24:41 +0200 | [diff] [blame] | 657 | case 7: /* channel-path-availability information */ |
| 658 | chsc_process_sei_chp_avail(sei_area); |
| 659 | break; |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 660 | case 8: /* channel-path-configuration notification */ |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 661 | chsc_process_sei_chp_config(sei_area); |
Peter Oberparleiter | e5854a5 | 2007-04-27 16:01:31 +0200 | [diff] [blame] | 662 | break; |
Sebastian Ott | 40ff4cc | 2012-08-28 16:47:02 +0200 | [diff] [blame] | 663 | case 12: /* scm change notification */ |
| 664 | chsc_process_sei_scm_change(sei_area); |
| 665 | break; |
Sebastian Ott | aebfa66 | 2013-02-28 12:07:55 +0100 | [diff] [blame] | 666 | case 14: /* scm available notification */ |
| 667 | chsc_process_sei_scm_avail(sei_area); |
| 668 | break; |
Vineeth Vijayan | 32ef938 | 2020-10-08 15:13:29 +0200 | [diff] [blame] | 669 | case 15: /* FCES event notification */ |
| 670 | chsc_process_sei_fces_event(sei_area); |
| 671 | break; |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 672 | default: /* other stuff */ |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 673 | CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 674 | sei_area->cc); |
| 675 | break; |
| 676 | } |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 677 | |
| 678 | /* Check if we might have lost some information. */ |
| 679 | if (sei_area->flags & 0x40) { |
| 680 | CIO_CRW_EVENT(2, "chsc: event overflow\n"); |
| 681 | css_schedule_eval_all(); |
| 682 | } |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 683 | } |
| 684 | |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 685 | static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm) |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 686 | { |
Sebastian Ott | 06cd7a8 | 2014-04-15 20:08:01 +0200 | [diff] [blame] | 687 | static int ntsm_unsupported; |
| 688 | |
| 689 | while (true) { |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 690 | memset(sei, 0, sizeof(*sei)); |
| 691 | sei->request.length = 0x0010; |
| 692 | sei->request.code = 0x000e; |
Sebastian Ott | 06cd7a8 | 2014-04-15 20:08:01 +0200 | [diff] [blame] | 693 | if (!ntsm_unsupported) |
| 694 | sei->ntsm = ntsm; |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 695 | |
| 696 | if (chsc(sei)) |
| 697 | break; |
| 698 | |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 699 | if (sei->response.code != 0x0001) { |
Sebastian Ott | 06cd7a8 | 2014-04-15 20:08:01 +0200 | [diff] [blame] | 700 | CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n", |
| 701 | sei->response.code, sei->ntsm); |
| 702 | |
| 703 | if (sei->response.code == 3 && sei->ntsm) { |
| 704 | /* Fallback for old firmware. */ |
| 705 | ntsm_unsupported = 1; |
| 706 | continue; |
| 707 | } |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 708 | break; |
| 709 | } |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 710 | |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 711 | CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt); |
| 712 | switch (sei->nt) { |
| 713 | case 0: |
| 714 | chsc_process_sei_nt0(&sei->u.nt0_area); |
| 715 | break; |
| 716 | case 2: |
| 717 | chsc_process_sei_nt2(&sei->u.nt2_area); |
| 718 | break; |
| 719 | default: |
| 720 | CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt); |
| 721 | break; |
| 722 | } |
Sebastian Ott | 06cd7a8 | 2014-04-15 20:08:01 +0200 | [diff] [blame] | 723 | |
| 724 | if (!(sei->u.nt0_area.flags & 0x80)) |
| 725 | break; |
| 726 | } |
Jan Glauber | cbc0dd1 | 2012-11-29 14:34:48 +0100 | [diff] [blame] | 727 | } |
| 728 | |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 729 | /* |
| 730 | * Handle channel subsystem related CRWs. |
| 731 | * Use store event information to find out what's going on. |
| 732 | * |
| 733 | * Note: Access to sei_page is serialized through machine check handler |
| 734 | * thread, so no need for locking. |
| 735 | */ |
Cornelia Huck | c115618 | 2008-07-14 09:58:46 +0200 | [diff] [blame] | 736 | static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) |
Peter Oberparleiter | 184357a | 2007-02-05 21:17:42 +0100 | [diff] [blame] | 737 | { |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 738 | struct chsc_sei *sei = sei_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
Cornelia Huck | c115618 | 2008-07-14 09:58:46 +0200 | [diff] [blame] | 740 | if (overflow) { |
| 741 | css_schedule_eval_all(); |
| 742 | return; |
| 743 | } |
| 744 | CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " |
| 745 | "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", |
| 746 | crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, |
| 747 | crw0->erc, crw0->rsid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
Cornelia Huck | c115618 | 2008-07-14 09:58:46 +0200 | [diff] [blame] | 749 | CIO_TRACE_EVENT(2, "prcss"); |
Sebastian Ott | 9a17e97 | 2013-01-15 19:04:39 +0100 | [diff] [blame] | 750 | chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | } |
| 752 | |
Peter Oberparleiter | 83b3370 | 2007-04-27 16:01:34 +0200 | [diff] [blame] | 753 | void chsc_chp_online(struct chp_id chpid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | { |
Sebastian Ott | 9f3d6d7 | 2016-01-25 10:32:51 +0100 | [diff] [blame] | 755 | struct channel_path *chp = chpid_to_chp(chpid); |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 756 | struct chp_link link; |
Sebastian Ott | 9f3d6d7 | 2016-01-25 10:32:51 +0100 | [diff] [blame] | 757 | char dbf_txt[15]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 759 | sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | CIO_TRACE_EVENT(2, dbf_txt); |
| 761 | |
Cornelia Huck | 22806dc | 2008-04-17 07:45:59 +0200 | [diff] [blame] | 762 | if (chp_get_status(chpid) != 0) { |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 763 | memset(&link, 0, sizeof(struct chp_link)); |
| 764 | link.chpid = chpid; |
Cornelia Huck | 22806dc | 2008-04-17 07:45:59 +0200 | [diff] [blame] | 765 | /* Wait until previous actions have settled. */ |
| 766 | css_wait_for_slow_path(); |
Sebastian Ott | 9f3d6d7 | 2016-01-25 10:32:51 +0100 | [diff] [blame] | 767 | |
| 768 | mutex_lock(&chp->lock); |
| 769 | chp_update_desc(chp); |
| 770 | mutex_unlock(&chp->lock); |
| 771 | |
Cornelia Huck | c820de3 | 2008-07-14 09:58:45 +0200 | [diff] [blame] | 772 | for_each_subchannel_staged(__s390_process_res_acc, NULL, |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 773 | &link); |
Peter Oberparleiter | 9955e8d1 | 2014-02-19 17:43:04 +0100 | [diff] [blame] | 774 | css_schedule_reprobe(); |
Cornelia Huck | 22806dc | 2008-04-17 07:45:59 +0200 | [diff] [blame] | 775 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | } |
| 777 | |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 778 | static void __s390_subchannel_vary_chpid(struct subchannel *sch, |
| 779 | struct chp_id chpid, int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | unsigned long flags; |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 782 | struct chp_link link; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 784 | memset(&link, 0, sizeof(struct chp_link)); |
| 785 | link.chpid = chpid; |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 786 | spin_lock_irqsave(&sch->lock, flags); |
Cornelia Huck | c820de3 | 2008-07-14 09:58:45 +0200 | [diff] [blame] | 787 | if (sch->driver && sch->driver->chp_event) |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 788 | sch->driver->chp_event(sch, &link, |
Cornelia Huck | c820de3 | 2008-07-14 09:58:45 +0200 | [diff] [blame] | 789 | on ? CHP_VARY_ON : CHP_VARY_OFF); |
Halil Pasic | b8fa3e9 | 2023-11-01 12:57:51 +0100 | [diff] [blame] | 790 | spin_unlock_irqrestore(&sch->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | } |
| 792 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 793 | static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | { |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 795 | struct chp_id *chpid = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
| 797 | __s390_subchannel_vary_chpid(sch, *chpid, 0); |
| 798 | return 0; |
| 799 | } |
| 800 | |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 801 | static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | { |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 803 | struct chp_id *chpid = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
| 805 | __s390_subchannel_vary_chpid(sch, *chpid, 1); |
| 806 | return 0; |
| 807 | } |
| 808 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 809 | /** |
| 810 | * chsc_chp_vary - propagate channel-path vary operation to subchannels |
| 811 | * @chpid: channl-path ID |
| 812 | * @on: non-zero for vary online, zero for vary offline |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | */ |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 814 | int chsc_chp_vary(struct chp_id chpid, int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | { |
Sebastian Ott | c38a90a | 2010-10-25 16:10:31 +0200 | [diff] [blame] | 816 | struct channel_path *chp = chpid_to_chp(chpid); |
Cornelia Huck | 99611f8 | 2008-07-14 09:59:02 +0200 | [diff] [blame] | 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | /* |
| 819 | * Redo PathVerification on the devices the chpid connects to |
| 820 | */ |
Sebastian Ott | c38a90a | 2010-10-25 16:10:31 +0200 | [diff] [blame] | 821 | if (on) { |
Peter Oberparleiter | cce0eac | 2013-03-11 12:58:18 +0100 | [diff] [blame] | 822 | /* Try to update the channel path description. */ |
| 823 | chp_update_desc(chp); |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 824 | for_each_subchannel_staged(s390_subchannel_vary_chpid_on, |
Peter Oberparleiter | 449666d | 2013-11-26 14:55:56 +0100 | [diff] [blame] | 825 | NULL, &chpid); |
| 826 | css_schedule_reprobe(); |
Sebastian Ott | c38a90a | 2010-10-25 16:10:31 +0200 | [diff] [blame] | 827 | } else |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 828 | for_each_subchannel_staged(s390_subchannel_vary_chpid_off, |
Sebastian Ott | 3b484ec | 2011-12-01 13:32:22 +0100 | [diff] [blame] | 829 | NULL, &chpid); |
Peter Oberparleiter | e82a156 | 2008-01-26 14:10:48 +0100 | [diff] [blame] | 830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | return 0; |
| 832 | } |
| 833 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 834 | static void |
| 835 | chsc_remove_cmg_attr(struct channel_subsystem *css) |
| 836 | { |
| 837 | int i; |
| 838 | |
| 839 | for (i = 0; i <= __MAX_CHPID; i++) { |
| 840 | if (!css->chps[i]) |
| 841 | continue; |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 842 | chp_remove_cmg_attr(css->chps[i]); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 843 | } |
| 844 | } |
| 845 | |
| 846 | static int |
| 847 | chsc_add_cmg_attr(struct channel_subsystem *css) |
| 848 | { |
| 849 | int i, ret; |
| 850 | |
| 851 | ret = 0; |
| 852 | for (i = 0; i <= __MAX_CHPID; i++) { |
| 853 | if (!css->chps[i]) |
| 854 | continue; |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 855 | ret = chp_add_cmg_attr(css->chps[i]); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 856 | if (ret) |
| 857 | goto cleanup; |
| 858 | } |
| 859 | return ret; |
| 860 | cleanup: |
Andy Shevchenko | 481ec3b | 2024-02-22 15:45:01 +0200 | [diff] [blame] | 861 | while (i--) { |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 862 | if (!css->chps[i]) |
| 863 | continue; |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 864 | chp_remove_cmg_attr(css->chps[i]); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 865 | } |
| 866 | return ret; |
| 867 | } |
| 868 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 869 | int __chsc_do_secm(struct channel_subsystem *css, int enable) |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 870 | { |
| 871 | struct { |
| 872 | struct chsc_header request; |
| 873 | u32 operation_code : 2; |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 874 | u32 : 1; |
| 875 | u32 e : 1; |
| 876 | u32 : 28; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 877 | u32 key : 4; |
| 878 | u32 : 28; |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 879 | dma64_t cub[CSS_NUM_CUB_PAGES]; |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 880 | dma64_t ecub[CSS_NUM_ECUB_PAGES]; |
| 881 | u32 reserved[5]; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 882 | struct chsc_header response; |
| 883 | u32 status : 8; |
| 884 | u32 : 4; |
| 885 | u32 fmt : 4; |
| 886 | u32 : 16; |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 887 | } __packed *secm_area; |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 888 | unsigned long flags; |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 889 | int ret, ccode, i; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 890 | |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 891 | spin_lock_irqsave(&chsc_page_lock, flags); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 892 | memset(chsc_page, 0, PAGE_SIZE); |
| 893 | secm_area = chsc_page; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 894 | secm_area->request.length = 0x0050; |
| 895 | secm_area->request.code = 0x0016; |
| 896 | |
Heiko Carstens | d1bf859 | 2010-02-26 22:37:30 +0100 | [diff] [blame] | 897 | secm_area->key = PAGE_DEFAULT_KEY >> 4; |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 898 | secm_area->e = 1; |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 899 | |
| 900 | for (i = 0; i < CSS_NUM_CUB_PAGES; i++) |
| 901 | secm_area->cub[i] = (__force dma64_t)virt_to_dma32(css->cub[i]); |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 902 | for (i = 0; i < CSS_NUM_ECUB_PAGES; i++) |
| 903 | secm_area->ecub[i] = virt_to_dma64(css->ecub[i]); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 904 | |
| 905 | secm_area->operation_code = enable ? 0 : 1; |
| 906 | |
| 907 | ccode = chsc(secm_area); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 908 | if (ccode > 0) { |
| 909 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
| 910 | goto out; |
| 911 | } |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 912 | |
| 913 | switch (secm_area->response.code) { |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 914 | case 0x0102: |
| 915 | case 0x0103: |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 916 | ret = -EINVAL; |
Sebastian Ott | 17e7d87 | 2009-03-26 15:24:17 +0100 | [diff] [blame] | 917 | break; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 918 | default: |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 919 | ret = chsc_error_from_response(secm_area->response.code); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 920 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 921 | if (ret != 0) |
| 922 | CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", |
| 923 | secm_area->response.code); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 924 | out: |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 925 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 926 | return ret; |
| 927 | } |
| 928 | |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 929 | static int cub_alloc(struct channel_subsystem *css) |
| 930 | { |
| 931 | int i; |
| 932 | |
| 933 | for (i = 0; i < CSS_NUM_CUB_PAGES; i++) { |
| 934 | css->cub[i] = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| 935 | if (!css->cub[i]) |
| 936 | return -ENOMEM; |
| 937 | } |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 938 | for (i = 0; i < CSS_NUM_ECUB_PAGES; i++) { |
| 939 | css->ecub[i] = (void *)get_zeroed_page(GFP_KERNEL); |
| 940 | if (!css->ecub[i]) |
| 941 | return -ENOMEM; |
| 942 | } |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 943 | |
| 944 | return 0; |
| 945 | } |
| 946 | |
| 947 | static void cub_free(struct channel_subsystem *css) |
| 948 | { |
| 949 | int i; |
| 950 | |
| 951 | for (i = 0; i < CSS_NUM_CUB_PAGES; i++) { |
| 952 | free_page((unsigned long)css->cub[i]); |
| 953 | css->cub[i] = NULL; |
| 954 | } |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 955 | for (i = 0; i < CSS_NUM_ECUB_PAGES; i++) { |
| 956 | free_page((unsigned long)css->ecub[i]); |
| 957 | css->ecub[i] = NULL; |
| 958 | } |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 959 | } |
| 960 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 961 | int |
| 962 | chsc_secm(struct channel_subsystem *css, int enable) |
| 963 | { |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 964 | int ret; |
| 965 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 966 | if (enable && !css->cm_enabled) { |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 967 | ret = cub_alloc(css); |
| 968 | if (ret) |
| 969 | goto out; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 970 | } |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 971 | ret = __chsc_do_secm(css, enable); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 972 | if (!ret) { |
| 973 | css->cm_enabled = enable; |
| 974 | if (css->cm_enabled) { |
| 975 | ret = chsc_add_cmg_attr(css); |
| 976 | if (ret) { |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 977 | __chsc_do_secm(css, 0); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 978 | css->cm_enabled = 0; |
| 979 | } |
| 980 | } else |
| 981 | chsc_remove_cmg_attr(css); |
| 982 | } |
Peter Oberparleiter | a817d98 | 2024-03-26 17:03:20 +0100 | [diff] [blame] | 983 | |
| 984 | out: |
| 985 | if (!css->cm_enabled) |
| 986 | cub_free(css); |
| 987 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 988 | return ret; |
| 989 | } |
| 990 | |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 991 | int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, |
Sebastian Ott | 906c976 | 2010-10-25 16:10:30 +0200 | [diff] [blame] | 992 | int c, int m, void *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | { |
Sebastian Ott | 906c976 | 2010-10-25 16:10:30 +0200 | [diff] [blame] | 994 | struct chsc_scpd *scpd_area; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | int ccode, ret; |
| 996 | |
Sebastian Ott | f977376 | 2016-06-21 13:59:08 +0200 | [diff] [blame] | 997 | if ((rfmt == 1 || rfmt == 0) && c == 1 && |
| 998 | !css_general_characteristics.fcs) |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 999 | return -EINVAL; |
| 1000 | if ((rfmt == 2) && !css_general_characteristics.cib) |
| 1001 | return -EINVAL; |
Sebastian Ott | fcc6dd4 | 2016-06-22 19:42:40 +0200 | [diff] [blame] | 1002 | if ((rfmt == 3) && !css_general_characteristics.util_str) |
| 1003 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Sebastian Ott | 906c976 | 2010-10-25 16:10:30 +0200 | [diff] [blame] | 1005 | memset(page, 0, PAGE_SIZE); |
| 1006 | scpd_area = page; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1007 | scpd_area->request.length = 0x0010; |
| 1008 | scpd_area->request.code = 0x0002; |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 1009 | scpd_area->cssid = chpid.cssid; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 1010 | scpd_area->first_chpid = chpid.id; |
| 1011 | scpd_area->last_chpid = chpid.id; |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 1012 | scpd_area->m = m; |
| 1013 | scpd_area->c = c; |
| 1014 | scpd_area->fmt = fmt; |
| 1015 | scpd_area->rfmt = rfmt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
| 1017 | ccode = chsc(scpd_area); |
Sebastian Ott | 906c976 | 2010-10-25 16:10:30 +0200 | [diff] [blame] | 1018 | if (ccode > 0) |
| 1019 | return (ccode == 3) ? -ENODEV : -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1021 | ret = chsc_error_from_response(scpd_area->response.code); |
Sebastian Ott | 906c976 | 2010-10-25 16:10:30 +0200 | [diff] [blame] | 1022 | if (ret) |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1023 | CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | scpd_area->response.code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | return ret; |
| 1026 | } |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 1027 | EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); |
| 1028 | |
Sebastian Ott | ded27d8 | 2017-06-29 13:27:22 +0200 | [diff] [blame] | 1029 | #define chsc_det_chp_desc(FMT, c) \ |
| 1030 | int chsc_determine_fmt##FMT##_channel_path_desc( \ |
| 1031 | struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \ |
| 1032 | { \ |
| 1033 | struct chsc_scpd *scpd_area; \ |
| 1034 | unsigned long flags; \ |
| 1035 | int ret; \ |
| 1036 | \ |
| 1037 | spin_lock_irqsave(&chsc_page_lock, flags); \ |
| 1038 | scpd_area = chsc_page; \ |
| 1039 | ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \ |
| 1040 | scpd_area); \ |
| 1041 | if (ret) \ |
| 1042 | goto out; \ |
| 1043 | \ |
| 1044 | memcpy(desc, scpd_area->data, sizeof(*desc)); \ |
| 1045 | out: \ |
| 1046 | spin_unlock_irqrestore(&chsc_page_lock, flags); \ |
| 1047 | return ret; \ |
Cornelia Huck | 9d92a7e | 2008-07-14 09:59:05 +0200 | [diff] [blame] | 1048 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | |
Sebastian Ott | ded27d8 | 2017-06-29 13:27:22 +0200 | [diff] [blame] | 1050 | chsc_det_chp_desc(0, 0) |
| 1051 | chsc_det_chp_desc(1, 1) |
Sebastian Ott | fcc6dd4 | 2016-06-22 19:42:40 +0200 | [diff] [blame] | 1052 | chsc_det_chp_desc(3, 0) |
Sebastian Ott | ce322cc | 2011-01-05 12:47:56 +0100 | [diff] [blame] | 1053 | |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1054 | static void |
| 1055 | chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, |
| 1056 | struct cmg_chars *chars) |
| 1057 | { |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1058 | int i, mask; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1059 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1060 | for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { |
| 1061 | mask = 0x80 >> (i + 3); |
| 1062 | if (cmcv & mask) |
Sebastian Ott | 0d9bfe9 | 2016-01-25 10:30:27 +0100 | [diff] [blame] | 1063 | chp->cmg_chars.values[i] = chars->values[i]; |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1064 | else |
Sebastian Ott | 0d9bfe9 | 2016-01-25 10:30:27 +0100 | [diff] [blame] | 1065 | chp->cmg_chars.values[i] = 0; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1066 | } |
| 1067 | } |
| 1068 | |
Peter Oberparleiter | 0f987e6 | 2024-03-26 17:03:24 +0100 | [diff] [blame] | 1069 | static unsigned long scmc_get_speed(u32 s, u32 p) |
| 1070 | { |
| 1071 | unsigned long speed = s; |
| 1072 | |
| 1073 | if (!p) |
| 1074 | p = 8; |
| 1075 | while (p--) |
| 1076 | speed *= 10; |
| 1077 | |
| 1078 | return speed; |
| 1079 | } |
| 1080 | |
Peter Oberparleiter | e6b6e10 | 2007-04-27 16:01:28 +0200 | [diff] [blame] | 1081 | int chsc_get_channel_measurement_chars(struct channel_path *chp) |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1082 | { |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 1083 | unsigned long flags; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1084 | int ccode, ret; |
| 1085 | |
| 1086 | struct { |
| 1087 | struct chsc_header request; |
| 1088 | u32 : 24; |
| 1089 | u32 first_chpid : 8; |
| 1090 | u32 : 24; |
| 1091 | u32 last_chpid : 8; |
| 1092 | u32 zeroes1; |
| 1093 | struct chsc_header response; |
| 1094 | u32 zeroes2; |
| 1095 | u32 not_valid : 1; |
| 1096 | u32 shared : 1; |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 1097 | u32 extended : 1; |
| 1098 | u32 : 21; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1099 | u32 chpid : 8; |
| 1100 | u32 cmcv : 5; |
Peter Oberparleiter | 0f987e6 | 2024-03-26 17:03:24 +0100 | [diff] [blame] | 1101 | u32 : 7; |
| 1102 | u32 cmgp : 4; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1103 | u32 cmgq : 8; |
| 1104 | u32 cmg : 8; |
Peter Oberparleiter | 0f987e6 | 2024-03-26 17:03:24 +0100 | [diff] [blame] | 1105 | u32 : 16; |
| 1106 | u32 cmgs : 16; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1107 | u32 data[NR_MEASUREMENT_CHARS]; |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 1108 | } *scmc_area; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1109 | |
Sebastian Ott | 61f0bfc | 2016-01-25 10:31:33 +0100 | [diff] [blame] | 1110 | chp->shared = -1; |
| 1111 | chp->cmg = -1; |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 1112 | chp->extended = 0; |
Peter Oberparleiter | 0f987e6 | 2024-03-26 17:03:24 +0100 | [diff] [blame] | 1113 | chp->speed = 0; |
Sebastian Ott | 61f0bfc | 2016-01-25 10:31:33 +0100 | [diff] [blame] | 1114 | |
| 1115 | if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) |
Sebastian Ott | 0b60137 | 2016-07-14 11:30:37 +0200 | [diff] [blame] | 1116 | return -EINVAL; |
Sebastian Ott | 61f0bfc | 2016-01-25 10:31:33 +0100 | [diff] [blame] | 1117 | |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 1118 | spin_lock_irqsave(&chsc_page_lock, flags); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1119 | memset(chsc_page, 0, PAGE_SIZE); |
| 1120 | scmc_area = chsc_page; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1121 | scmc_area->request.length = 0x0010; |
| 1122 | scmc_area->request.code = 0x0022; |
Peter Oberparleiter | f86635f | 2007-04-27 16:01:26 +0200 | [diff] [blame] | 1123 | scmc_area->first_chpid = chp->chpid.id; |
| 1124 | scmc_area->last_chpid = chp->chpid.id; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1125 | |
| 1126 | ccode = chsc(scmc_area); |
| 1127 | if (ccode > 0) { |
| 1128 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
| 1129 | goto out; |
| 1130 | } |
| 1131 | |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1132 | ret = chsc_error_from_response(scmc_area->response.code); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1133 | if (ret) { |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1134 | CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1135 | scmc_area->response.code); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1136 | goto out; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1137 | } |
Sebastian Ott | 61f0bfc | 2016-01-25 10:31:33 +0100 | [diff] [blame] | 1138 | if (scmc_area->not_valid) |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1139 | goto out; |
Sebastian Ott | 61f0bfc | 2016-01-25 10:31:33 +0100 | [diff] [blame] | 1140 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1141 | chp->cmg = scmc_area->cmg; |
| 1142 | chp->shared = scmc_area->shared; |
Peter Oberparleiter | 2dc8903 | 2024-03-26 17:03:22 +0100 | [diff] [blame] | 1143 | chp->extended = scmc_area->extended; |
Peter Oberparleiter | 0f987e6 | 2024-03-26 17:03:24 +0100 | [diff] [blame] | 1144 | chp->speed = scmc_get_speed(scmc_area->cmgs, scmc_area->cmgp); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1145 | chsc_initialize_cmg_chars(chp, scmc_area->cmcv, |
| 1146 | (struct cmg_chars *) &scmc_area->data); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1147 | out: |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 1148 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1149 | return ret; |
| 1150 | } |
| 1151 | |
Sebastian Ott | 34aec07 | 2010-10-25 16:10:28 +0200 | [diff] [blame] | 1152 | int __init chsc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | { |
Cornelia Huck | c115618 | 2008-07-14 09:58:46 +0200 | [diff] [blame] | 1154 | int ret; |
| 1155 | |
Peter Oberparleiter | a3a64a4 | 2024-01-18 16:09:39 +0100 | [diff] [blame] | 1156 | sei_page = (void *)get_zeroed_page(GFP_KERNEL); |
| 1157 | chsc_page = (void *)get_zeroed_page(GFP_KERNEL); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1158 | if (!sei_page || !chsc_page) { |
| 1159 | ret = -ENOMEM; |
| 1160 | goto out_err; |
Cornelia Huck | c115618 | 2008-07-14 09:58:46 +0200 | [diff] [blame] | 1161 | } |
Heiko Carstens | f5daba1 | 2009-03-26 15:24:01 +0100 | [diff] [blame] | 1162 | ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); |
Cornelia Huck | c115618 | 2008-07-14 09:58:46 +0200 | [diff] [blame] | 1163 | if (ret) |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1164 | goto out_err; |
| 1165 | return ret; |
| 1166 | out_err: |
| 1167 | free_page((unsigned long)chsc_page); |
| 1168 | free_page((unsigned long)sei_page); |
Cornelia Huck | c115618 | 2008-07-14 09:58:46 +0200 | [diff] [blame] | 1169 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | } |
| 1171 | |
Sebastian Ott | 34aec07 | 2010-10-25 16:10:28 +0200 | [diff] [blame] | 1172 | void __init chsc_init_cleanup(void) |
Cornelia Huck | 4434a38 | 2007-07-27 12:29:21 +0200 | [diff] [blame] | 1173 | { |
Heiko Carstens | f5daba1 | 2009-03-26 15:24:01 +0100 | [diff] [blame] | 1174 | crw_unregister_handler(CRW_RSC_CSS); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1175 | free_page((unsigned long)chsc_page); |
Sebastian Ott | 34aec07 | 2010-10-25 16:10:28 +0200 | [diff] [blame] | 1176 | free_page((unsigned long)sei_page); |
Cornelia Huck | 4434a38 | 2007-07-27 12:29:21 +0200 | [diff] [blame] | 1177 | } |
| 1178 | |
Sebastian Ott | 18e22a1 | 2015-06-29 18:39:54 +0200 | [diff] [blame] | 1179 | int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code) |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 1180 | { |
| 1181 | int ret; |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 1182 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1183 | sda_area->request.length = 0x0400; |
| 1184 | sda_area->request.code = 0x0031; |
| 1185 | sda_area->operation_code = operation_code; |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 1186 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1187 | ret = chsc(sda_area); |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 1188 | if (ret > 0) { |
| 1189 | ret = (ret == 3) ? -ENODEV : -EBUSY; |
| 1190 | goto out; |
| 1191 | } |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1192 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1193 | switch (sda_area->response.code) { |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1194 | case 0x0101: |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 1195 | ret = -EOPNOTSUPP; |
| 1196 | break; |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1197 | default: |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1198 | ret = chsc_error_from_response(sda_area->response.code); |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 1199 | } |
Sebastian Ott | 18e22a1 | 2015-06-29 18:39:54 +0200 | [diff] [blame] | 1200 | out: |
| 1201 | return ret; |
| 1202 | } |
| 1203 | |
| 1204 | int chsc_enable_facility(int operation_code) |
| 1205 | { |
| 1206 | struct chsc_sda_area *sda_area; |
| 1207 | unsigned long flags; |
| 1208 | int ret; |
| 1209 | |
| 1210 | spin_lock_irqsave(&chsc_page_lock, flags); |
| 1211 | memset(chsc_page, 0, PAGE_SIZE); |
| 1212 | sda_area = chsc_page; |
| 1213 | |
| 1214 | ret = __chsc_enable_facility(sda_area, operation_code); |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1215 | if (ret != 0) |
| 1216 | CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1217 | operation_code, sda_area->response.code); |
Sebastian Ott | 18e22a1 | 2015-06-29 18:39:54 +0200 | [diff] [blame] | 1218 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1219 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
Cornelia Huck | fb6958a | 2006-01-06 00:19:25 -0800 | [diff] [blame] | 1220 | return ret; |
| 1221 | } |
| 1222 | |
Alexandra Winter | b983aa1 | 2020-09-10 19:23:45 +0200 | [diff] [blame] | 1223 | int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid) |
Sebastian Ott | e2e0de9 | 2016-06-17 19:45:23 +0200 | [diff] [blame] | 1224 | { |
| 1225 | struct { |
| 1226 | struct chsc_header request; |
| 1227 | u8 atype; |
| 1228 | u32 : 24; |
| 1229 | u32 reserved1[6]; |
| 1230 | struct chsc_header response; |
| 1231 | u32 reserved2[3]; |
| 1232 | struct { |
| 1233 | u8 cssid; |
Alexandra Winter | b983aa1 | 2020-09-10 19:23:45 +0200 | [diff] [blame] | 1234 | u8 iid; |
| 1235 | u32 : 16; |
Heiko Carstens | e20985a | 2023-04-11 11:18:59 +0200 | [diff] [blame] | 1236 | } list[]; |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 1237 | } *sdcal_area; |
Sebastian Ott | e2e0de9 | 2016-06-17 19:45:23 +0200 | [diff] [blame] | 1238 | int ret; |
| 1239 | |
| 1240 | spin_lock_irq(&chsc_page_lock); |
| 1241 | memset(chsc_page, 0, PAGE_SIZE); |
| 1242 | sdcal_area = chsc_page; |
| 1243 | sdcal_area->request.length = 0x0020; |
| 1244 | sdcal_area->request.code = 0x0034; |
| 1245 | sdcal_area->atype = 4; |
| 1246 | |
| 1247 | ret = chsc(sdcal_area); |
| 1248 | if (ret) { |
| 1249 | ret = (ret == 3) ? -ENODEV : -EBUSY; |
| 1250 | goto exit; |
| 1251 | } |
| 1252 | |
| 1253 | ret = chsc_error_from_response(sdcal_area->response.code); |
| 1254 | if (ret) { |
| 1255 | CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n", |
| 1256 | sdcal_area->response.code); |
| 1257 | goto exit; |
| 1258 | } |
| 1259 | |
| 1260 | if ((addr_t) &sdcal_area->list[idx] < |
Alexandra Winter | b983aa1 | 2020-09-10 19:23:45 +0200 | [diff] [blame] | 1261 | (addr_t) &sdcal_area->response + sdcal_area->response.length) { |
| 1262 | *cssid = sdcal_area->list[idx].cssid; |
| 1263 | *iid = sdcal_area->list[idx].iid; |
| 1264 | } |
Sebastian Ott | e2e0de9 | 2016-06-17 19:45:23 +0200 | [diff] [blame] | 1265 | else |
| 1266 | ret = -ENODEV; |
| 1267 | exit: |
| 1268 | spin_unlock_irq(&chsc_page_lock); |
| 1269 | return ret; |
| 1270 | } |
| 1271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | struct css_general_char css_general_characteristics; |
| 1273 | struct css_chsc_char css_chsc_characteristics; |
| 1274 | |
| 1275 | int __init |
| 1276 | chsc_determine_css_characteristics(void) |
| 1277 | { |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 1278 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | int result; |
| 1280 | struct { |
| 1281 | struct chsc_header request; |
| 1282 | u32 reserved1; |
| 1283 | u32 reserved2; |
| 1284 | u32 reserved3; |
| 1285 | struct chsc_header response; |
| 1286 | u32 reserved4; |
| 1287 | u32 general_char[510]; |
Sebastian Ott | 34aec07 | 2010-10-25 16:10:28 +0200 | [diff] [blame] | 1288 | u32 chsc_char[508]; |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 1289 | } *scsc_area; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 1291 | spin_lock_irqsave(&chsc_page_lock, flags); |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1292 | memset(chsc_page, 0, PAGE_SIZE); |
| 1293 | scsc_area = chsc_page; |
Cornelia Huck | 495a5b4 | 2006-03-24 03:15:14 -0800 | [diff] [blame] | 1294 | scsc_area->request.length = 0x0010; |
| 1295 | scsc_area->request.code = 0x0010; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | |
| 1297 | result = chsc(scsc_area); |
| 1298 | if (result) { |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1299 | result = (result == 3) ? -ENODEV : -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | goto exit; |
| 1301 | } |
| 1302 | |
Cornelia Huck | b9c9a21 | 2008-02-05 16:50:34 +0100 | [diff] [blame] | 1303 | result = chsc_error_from_response(scsc_area->response.code); |
| 1304 | if (result == 0) { |
| 1305 | memcpy(&css_general_characteristics, scsc_area->general_char, |
| 1306 | sizeof(css_general_characteristics)); |
| 1307 | memcpy(&css_chsc_characteristics, scsc_area->chsc_char, |
| 1308 | sizeof(css_chsc_characteristics)); |
| 1309 | } else |
| 1310 | CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", |
| 1311 | scsc_area->response.code); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | exit: |
Sebastian Ott | d53c51f | 2016-09-28 13:36:19 +0200 | [diff] [blame] | 1313 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return result; |
| 1315 | } |
| 1316 | |
| 1317 | EXPORT_SYMBOL_GPL(css_general_characteristics); |
| 1318 | EXPORT_SYMBOL_GPL(css_chsc_characteristics); |
Martin Schwidefsky | d2fec59 | 2008-07-14 09:58:56 +0200 | [diff] [blame] | 1319 | |
Sven Schnelle | 5ace65e | 2022-05-03 09:58:33 +0200 | [diff] [blame] | 1320 | int chsc_sstpc(void *page, unsigned int op, u16 ctrl, long *clock_delta) |
Martin Schwidefsky | d2fec59 | 2008-07-14 09:58:56 +0200 | [diff] [blame] | 1321 | { |
| 1322 | struct { |
| 1323 | struct chsc_header request; |
| 1324 | unsigned int rsvd0; |
| 1325 | unsigned int op : 8; |
| 1326 | unsigned int rsvd1 : 8; |
| 1327 | unsigned int ctrl : 16; |
| 1328 | unsigned int rsvd2[5]; |
| 1329 | struct chsc_header response; |
Martin Schwidefsky | 2f82f57 | 2016-05-31 09:09:57 +0200 | [diff] [blame] | 1330 | unsigned int rsvd3[3]; |
Sven Schnelle | 5ace65e | 2022-05-03 09:58:33 +0200 | [diff] [blame] | 1331 | s64 clock_delta; |
Martin Schwidefsky | 2f82f57 | 2016-05-31 09:09:57 +0200 | [diff] [blame] | 1332 | unsigned int rsvd4[2]; |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 1333 | } *rr; |
Martin Schwidefsky | d2fec59 | 2008-07-14 09:58:56 +0200 | [diff] [blame] | 1334 | int rc; |
| 1335 | |
| 1336 | memset(page, 0, PAGE_SIZE); |
| 1337 | rr = page; |
| 1338 | rr->request.length = 0x0020; |
| 1339 | rr->request.code = 0x0033; |
| 1340 | rr->op = op; |
| 1341 | rr->ctrl = ctrl; |
| 1342 | rc = chsc(rr); |
| 1343 | if (rc) |
| 1344 | return -EIO; |
| 1345 | rc = (rr->response.code == 0x0001) ? 0 : -EIO; |
Martin Schwidefsky | 2f82f57 | 2016-05-31 09:09:57 +0200 | [diff] [blame] | 1346 | if (clock_delta) |
| 1347 | *clock_delta = rr->clock_delta; |
Martin Schwidefsky | d2fec59 | 2008-07-14 09:58:56 +0200 | [diff] [blame] | 1348 | return rc; |
| 1349 | } |
| 1350 | |
| 1351 | int chsc_sstpi(void *page, void *result, size_t size) |
| 1352 | { |
| 1353 | struct { |
| 1354 | struct chsc_header request; |
| 1355 | unsigned int rsvd0[3]; |
| 1356 | struct chsc_header response; |
Heiko Carstens | 9fbd5a0 | 2016-12-15 11:05:13 +0100 | [diff] [blame] | 1357 | char data[]; |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 1358 | } *rr; |
Martin Schwidefsky | d2fec59 | 2008-07-14 09:58:56 +0200 | [diff] [blame] | 1359 | int rc; |
| 1360 | |
| 1361 | memset(page, 0, PAGE_SIZE); |
| 1362 | rr = page; |
| 1363 | rr->request.length = 0x0010; |
| 1364 | rr->request.code = 0x0038; |
| 1365 | rc = chsc(rr); |
| 1366 | if (rc) |
| 1367 | return -EIO; |
| 1368 | memcpy(result, &rr->data, size); |
| 1369 | return (rr->response.code == 0x0001) ? 0 : -EIO; |
| 1370 | } |
| 1371 | |
Sven Schnelle | b2539aa | 2020-06-12 12:59:19 +0200 | [diff] [blame] | 1372 | int chsc_stzi(void *page, void *result, size_t size) |
| 1373 | { |
| 1374 | struct { |
| 1375 | struct chsc_header request; |
| 1376 | unsigned int rsvd0[3]; |
| 1377 | struct chsc_header response; |
| 1378 | char data[]; |
| 1379 | } *rr; |
| 1380 | int rc; |
| 1381 | |
| 1382 | memset(page, 0, PAGE_SIZE); |
| 1383 | rr = page; |
| 1384 | rr->request.length = 0x0010; |
| 1385 | rr->request.code = 0x003e; |
| 1386 | rc = chsc(rr); |
| 1387 | if (rc) |
| 1388 | return -EIO; |
| 1389 | memcpy(result, &rr->data, size); |
| 1390 | return (rr->response.code == 0x0001) ? 0 : -EIO; |
| 1391 | } |
| 1392 | |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 1393 | int chsc_siosl(struct subchannel_id schid) |
| 1394 | { |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1395 | struct { |
| 1396 | struct chsc_header request; |
| 1397 | u32 word1; |
| 1398 | struct subchannel_id sid; |
| 1399 | u32 word3; |
| 1400 | struct chsc_header response; |
| 1401 | u32 word[11]; |
Sebastian Ott | ccaabee | 2018-06-25 14:25:59 +0200 | [diff] [blame] | 1402 | } *siosl_area; |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 1403 | unsigned long flags; |
| 1404 | int ccode; |
| 1405 | int rc; |
| 1406 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1407 | spin_lock_irqsave(&chsc_page_lock, flags); |
| 1408 | memset(chsc_page, 0, PAGE_SIZE); |
| 1409 | siosl_area = chsc_page; |
| 1410 | siosl_area->request.length = 0x0010; |
| 1411 | siosl_area->request.code = 0x0046; |
| 1412 | siosl_area->word1 = 0x80000000; |
| 1413 | siosl_area->sid = schid; |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 1414 | |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1415 | ccode = chsc(siosl_area); |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 1416 | if (ccode > 0) { |
| 1417 | if (ccode == 3) |
| 1418 | rc = -ENODEV; |
| 1419 | else |
| 1420 | rc = -EBUSY; |
| 1421 | CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", |
| 1422 | schid.ssid, schid.sch_no, ccode); |
| 1423 | goto out; |
| 1424 | } |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1425 | rc = chsc_error_from_response(siosl_area->response.code); |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 1426 | if (rc) |
| 1427 | CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", |
| 1428 | schid.ssid, schid.sch_no, |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1429 | siosl_area->response.code); |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 1430 | else |
| 1431 | CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", |
| 1432 | schid.ssid, schid.sch_no); |
| 1433 | out: |
Sebastian Ott | 34196f8 | 2010-10-25 16:10:29 +0200 | [diff] [blame] | 1434 | spin_unlock_irqrestore(&chsc_page_lock, flags); |
Michael Ernst | fd0457a | 2010-08-09 18:12:50 +0200 | [diff] [blame] | 1435 | return rc; |
| 1436 | } |
| 1437 | EXPORT_SYMBOL_GPL(chsc_siosl); |
Sebastian Ott | 184b08a | 2012-08-28 16:45:42 +0200 | [diff] [blame] | 1438 | |
| 1439 | /** |
| 1440 | * chsc_scm_info() - store SCM information (SSI) |
| 1441 | * @scm_area: request and response block for SSI |
| 1442 | * @token: continuation token |
| 1443 | * |
| 1444 | * Returns 0 on success. |
| 1445 | */ |
| 1446 | int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token) |
| 1447 | { |
| 1448 | int ccode, ret; |
| 1449 | |
| 1450 | memset(scm_area, 0, sizeof(*scm_area)); |
| 1451 | scm_area->request.length = 0x0020; |
| 1452 | scm_area->request.code = 0x004C; |
| 1453 | scm_area->reqtok = token; |
| 1454 | |
| 1455 | ccode = chsc(scm_area); |
| 1456 | if (ccode > 0) { |
| 1457 | ret = (ccode == 3) ? -ENODEV : -EBUSY; |
| 1458 | goto out; |
| 1459 | } |
| 1460 | ret = chsc_error_from_response(scm_area->response.code); |
| 1461 | if (ret != 0) |
| 1462 | CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n", |
| 1463 | scm_area->response.code); |
| 1464 | out: |
| 1465 | return ret; |
| 1466 | } |
| 1467 | EXPORT_SYMBOL_GPL(chsc_scm_info); |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 1468 | |
| 1469 | /** |
Alexandra Winter | a0138f5 | 2020-04-16 15:08:41 +0200 | [diff] [blame] | 1470 | * chsc_pnso() - Perform Network-Subchannel Operation |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 1471 | * @schid: id of the subchannel on which PNSO is performed |
Alexandra Winter | a0138f5 | 2020-04-16 15:08:41 +0200 | [diff] [blame] | 1472 | * @pnso_area: request and response block for the operation |
Alexandra Winter | 4fea49a | 2020-09-10 19:23:44 +0200 | [diff] [blame] | 1473 | * @oc: Operation Code |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 1474 | * @resume_token: resume token for multiblock response |
| 1475 | * @cnc: Boolean change-notification control |
| 1476 | * |
Alexandra Winter | a0138f5 | 2020-04-16 15:08:41 +0200 | [diff] [blame] | 1477 | * pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL) |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 1478 | * |
| 1479 | * Returns 0 on success. |
| 1480 | */ |
Alexandra Winter | 4fea49a | 2020-09-10 19:23:44 +0200 | [diff] [blame] | 1481 | int chsc_pnso(struct subchannel_id schid, struct chsc_pnso_area *pnso_area, |
| 1482 | u8 oc, struct chsc_pnso_resume_token resume_token, int cnc) |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 1483 | { |
Alexandra Winter | a0138f5 | 2020-04-16 15:08:41 +0200 | [diff] [blame] | 1484 | memset(pnso_area, 0, sizeof(*pnso_area)); |
| 1485 | pnso_area->request.length = 0x0030; |
| 1486 | pnso_area->request.code = 0x003d; /* network-subchannel operation */ |
| 1487 | pnso_area->m = schid.m; |
| 1488 | pnso_area->ssid = schid.ssid; |
| 1489 | pnso_area->sch = schid.sch_no; |
| 1490 | pnso_area->cssid = schid.cssid; |
Alexandra Winter | 4fea49a | 2020-09-10 19:23:44 +0200 | [diff] [blame] | 1491 | pnso_area->oc = oc; |
Alexandra Winter | a0138f5 | 2020-04-16 15:08:41 +0200 | [diff] [blame] | 1492 | pnso_area->resume_token = resume_token; |
| 1493 | pnso_area->n = (cnc != 0); |
| 1494 | if (chsc(pnso_area)) |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 1495 | return -EIO; |
Alexandra Winter | a0138f5 | 2020-04-16 15:08:41 +0200 | [diff] [blame] | 1496 | return chsc_error_from_response(pnso_area->response.code); |
Eugene Crosser | 1c59a86 | 2013-04-24 12:00:23 +0200 | [diff] [blame] | 1497 | } |
Michael Mueller | 3dec192 | 2019-01-31 09:52:39 +0100 | [diff] [blame] | 1498 | |
| 1499 | int chsc_sgib(u32 origin) |
| 1500 | { |
| 1501 | struct { |
| 1502 | struct chsc_header request; |
| 1503 | u16 op; |
| 1504 | u8 reserved01[2]; |
| 1505 | u8 reserved02:4; |
| 1506 | u8 fmt:4; |
| 1507 | u8 reserved03[7]; |
| 1508 | /* operation data area begin */ |
| 1509 | u8 reserved04[4]; |
| 1510 | u32 gib_origin; |
| 1511 | u8 reserved05[10]; |
| 1512 | u8 aix; |
| 1513 | u8 reserved06[4029]; |
| 1514 | struct chsc_header response; |
| 1515 | u8 reserved07[4]; |
| 1516 | } *sgib_area; |
| 1517 | int ret; |
| 1518 | |
| 1519 | spin_lock_irq(&chsc_page_lock); |
| 1520 | memset(chsc_page, 0, PAGE_SIZE); |
| 1521 | sgib_area = chsc_page; |
| 1522 | sgib_area->request.length = 0x0fe0; |
| 1523 | sgib_area->request.code = 0x0021; |
| 1524 | sgib_area->op = 0x1; |
| 1525 | sgib_area->gib_origin = origin; |
| 1526 | |
| 1527 | ret = chsc(sgib_area); |
| 1528 | if (ret == 0) |
| 1529 | ret = chsc_error_from_response(sgib_area->response.code); |
| 1530 | spin_unlock_irq(&chsc_page_lock); |
| 1531 | |
| 1532 | return ret; |
| 1533 | } |
| 1534 | EXPORT_SYMBOL_GPL(chsc_sgib); |
Vineeth Vijayan | 4cd6094 | 2020-10-08 15:13:28 +0200 | [diff] [blame] | 1535 | |
| 1536 | #define SCUD_REQ_LEN 0x10 /* SCUD request block length */ |
| 1537 | #define SCUD_REQ_CMD 0x4b /* SCUD Command Code */ |
| 1538 | |
| 1539 | struct chse_cudb { |
| 1540 | u16 flags:8; |
| 1541 | u16 chp_valid:8; |
| 1542 | u16 cu; |
| 1543 | u32 esm_valid:8; |
| 1544 | u32:24; |
| 1545 | u8 chpid[8]; |
| 1546 | u32:32; |
| 1547 | u32:32; |
| 1548 | u8 esm[8]; |
| 1549 | u32 efla[8]; |
| 1550 | } __packed; |
| 1551 | |
| 1552 | struct chsc_scud { |
| 1553 | struct chsc_header request; |
| 1554 | u16:4; |
| 1555 | u16 fmt:4; |
| 1556 | u16 cssid:8; |
| 1557 | u16 first_cu; |
| 1558 | u16:16; |
| 1559 | u16 last_cu; |
| 1560 | u32:32; |
| 1561 | struct chsc_header response; |
| 1562 | u16:4; |
| 1563 | u16 fmt_resp:4; |
| 1564 | u32:24; |
| 1565 | struct chse_cudb cudb[]; |
| 1566 | } __packed; |
| 1567 | |
| 1568 | /** |
| 1569 | * chsc_scud() - Store control-unit description. |
| 1570 | * @cu: number of the control-unit |
| 1571 | * @esm: 8 1-byte endpoint security mode values |
| 1572 | * @esm_valid: validity mask for @esm |
| 1573 | * |
| 1574 | * Interface to retrieve information about the endpoint security |
| 1575 | * modes for up to 8 paths of a control unit. |
| 1576 | * |
| 1577 | * Returns 0 on success. |
| 1578 | */ |
| 1579 | int chsc_scud(u16 cu, u64 *esm, u8 *esm_valid) |
| 1580 | { |
| 1581 | struct chsc_scud *scud = chsc_page; |
| 1582 | int ret; |
| 1583 | |
| 1584 | spin_lock_irq(&chsc_page_lock); |
| 1585 | memset(chsc_page, 0, PAGE_SIZE); |
| 1586 | scud->request.length = SCUD_REQ_LEN; |
| 1587 | scud->request.code = SCUD_REQ_CMD; |
| 1588 | scud->fmt = 0; |
| 1589 | scud->cssid = 0; |
| 1590 | scud->first_cu = cu; |
| 1591 | scud->last_cu = cu; |
| 1592 | |
| 1593 | ret = chsc(scud); |
| 1594 | if (!ret) |
| 1595 | ret = chsc_error_from_response(scud->response.code); |
| 1596 | |
| 1597 | if (!ret && (scud->response.length <= 8 || scud->fmt_resp != 0 |
| 1598 | || !(scud->cudb[0].flags & 0x80) |
| 1599 | || scud->cudb[0].cu != cu)) { |
| 1600 | |
| 1601 | CIO_MSG_EVENT(2, "chsc: scud failed rc=%04x, L2=%04x " |
| 1602 | "FMT=%04x, cudb.flags=%02x, cudb.cu=%04x", |
| 1603 | scud->response.code, scud->response.length, |
| 1604 | scud->fmt_resp, scud->cudb[0].flags, scud->cudb[0].cu); |
| 1605 | ret = -EINVAL; |
| 1606 | } |
| 1607 | |
| 1608 | if (ret) |
| 1609 | goto out; |
| 1610 | |
| 1611 | memcpy(esm, scud->cudb[0].esm, sizeof(*esm)); |
| 1612 | *esm_valid = scud->cudb[0].esm_valid; |
| 1613 | out: |
| 1614 | spin_unlock_irq(&chsc_page_lock); |
| 1615 | return ret; |
| 1616 | } |
| 1617 | EXPORT_SYMBOL_GPL(chsc_scud); |