| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Peter Oberparleiter | 1666 | 26.97% | 14 | 15.22% |
| Sebastian Ott | 1549 | 25.08% | 30 | 32.61% |
| Cornelia Huck | 1181 | 19.12% | 21 | 22.83% |
| Martin Schwidefsky | 845 | 13.68% | 12 | 13.04% |
| Jan Glauber | 280 | 4.53% | 1 | 1.09% |
| Andrew Morton | 243 | 3.93% | 3 | 3.26% |
| Michael Ernst | 234 | 3.79% | 2 | 2.17% |
| Eugene Crosser | 137 | 2.22% | 1 | 1.09% |
| Peter Tiedemann | 21 | 0.34% | 1 | 1.09% |
| Heiko Carstens | 8 | 0.13% | 4 | 4.35% |
| Art Haas | 6 | 0.10% | 1 | 1.09% |
| Stefan Bader | 6 | 0.10% | 1 | 1.09% |
| Greg Kroah-Hartman | 1 | 0.02% | 1 | 1.09% |
| Total | 6177 | 92 |
// SPDX-License-Identifier: GPL-2.0 /* * S/390 common I/O routines -- channel subsystem call * * Copyright IBM Corp. 1999,2012 * Author(s): Ingo Adlung (adlung@de.ibm.com) * Cornelia Huck (cornelia.huck@de.ibm.com) * Arnd Bergmann (arndb@de.ibm.com) */ #define KMSG_COMPONENT "cio" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/module.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/device.h> #include <linux/mutex.h> #include <linux/pci.h> #include <asm/cio.h> #include <asm/chpid.h> #include <asm/chsc.h> #include <asm/crw.h> #include <asm/isc.h> #include <asm/ebcdic.h> #include "css.h" #include "cio.h" #include "cio_debug.h" #include "ioasm.h" #include "chp.h" #include "chsc.h" static void *sei_page; static void *chsc_page; static DEFINE_SPINLOCK(chsc_page_lock); /** * chsc_error_from_response() - convert a chsc response to an error * @response: chsc response code * * Returns an appropriate Linux error code for @response. */ int chsc_error_from_response(int response) { switch (response) { case 0x0001: return 0; case 0x0002: case 0x0003: case 0x0006: case 0x0007: case 0x0008: case 0x000a: case 0x0104: return -EINVAL; case 0x0004: return -EOPNOTSUPP; case 0x000b: case 0x0107: /* "Channel busy" for the op 0x003d */ return -EBUSY; case 0x0100: case 0x0102: return -ENOMEM; default: return -EIO; } } EXPORT_SYMBOL_GPL(chsc_error_from_response); struct chsc_ssd_area { struct chsc_header request; u16 :10; u16 ssid:2; u16 :4; u16 f_sch; /* first subchannel */ u16 :16; u16 l_sch; /* last subchannel */ u32 :32; struct chsc_header response; u32 :32; u8 sch_valid : 1; u8 dev_valid : 1; u8 st : 3; /* subchannel type */ u8 zeroes : 3; u8 unit_addr; /* unit address */ u16 devno; /* device number */ u8 path_mask; u8 fla_valid_mask; u16 sch; /* subchannel */ u8 chpid[8]; /* chpids 0-7 */ u16 fla[8]; /* full link addresses 0-7 */ } __packed __aligned(PAGE_SIZE); int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd) { struct chsc_ssd_area *ssd_area; unsigned long flags; int ccode; int ret; int i; int mask; spin_lock_irqsave(&chsc_page_lock, flags); memset(chsc_page, 0, PAGE_SIZE); ssd_area = chsc_page; ssd_area->request.length = 0x0010; ssd_area->request.code = 0x0004; ssd_area->ssid = schid.ssid; ssd_area->f_sch = schid.sch_no; ssd_area->l_sch = schid.sch_no; ccode = chsc(ssd_area); /* Check response. */ if (ccode > 0) { ret = (ccode == 3) ? -ENODEV : -EBUSY; goto out; } ret = chsc_error_from_response(ssd_area->response.code); if (ret != 0) { CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n", schid.ssid, schid.sch_no, ssd_area->response.code); goto out; } if (!ssd_area->sch_valid) { ret = -ENODEV; goto out; } /* Copy data */ ret = 0; memset(ssd, 0, sizeof(struct chsc_ssd_info)); if ((ssd_area->st != SUBCHANNEL_TYPE_IO) && (ssd_area->st != SUBCHANNEL_TYPE_MSG)) goto out; ssd->path_mask = ssd_area->path_mask; ssd->fla_valid_mask = ssd_area->fla_valid_mask; for (i = 0; i < 8; i++) { mask = 0x80 >> i; if (ssd_area->path_mask & mask) { chp_id_init(&ssd->chpid[i]); ssd->chpid[i].id = ssd_area->chpid[i]; } if (ssd_area->fla_valid_mask & mask) ssd->fla[i] = ssd_area->fla[i]; } out: spin_unlock_irqrestore(&chsc_page_lock, flags); return ret; } /** * chsc_ssqd() - store subchannel QDIO data (SSQD) * @schid: id of the subchannel on which SSQD is performed * @ssqd: request and response block for SSQD * * Returns 0 on success. */ int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) { memset(ssqd, 0, sizeof(*ssqd)); ssqd->request.length = 0x0010; ssqd->request.code = 0x0024; ssqd->first_sch = schid.sch_no; ssqd->last_sch = schid.sch_no; ssqd->ssid = schid.ssid; if (chsc(ssqd)) return -EIO; return chsc_error_from_response(ssqd->response.code); } EXPORT_SYMBOL_GPL(chsc_ssqd); /** * chsc_sadc() - set adapter device controls (SADC) * @schid: id of the subchannel on which SADC is performed * @scssc: request and response block for SADC * @summary_indicator_addr: summary indicator address * @subchannel_indicator_addr: subchannel indicator address * * Returns 0 on success. */ int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc, u64 summary_indicator_addr, u64 subchannel_indicator_addr) { memset(scssc, 0, sizeof(*scssc)); scssc->request.length = 0x0fe0; scssc->request.code = 0x0021; scssc->operation_code = 0; scssc->summary_indicator_addr = summary_indicator_addr; scssc->subchannel_indicator_addr = subchannel_indicator_addr; scssc->ks = PAGE_DEFAULT_KEY >> 4; scssc->kc = PAGE_DEFAULT_KEY >> 4; scssc->isc = QDIO_AIRQ_ISC; scssc->schid = schid; /* enable the time delay disablement facility */ if (css_general_characteristics.aif_tdd) scssc->word_with_d_bit = 0x10000000; if (chsc(scssc)) return -EIO; return chsc_error_from_response(scssc->response.code); } EXPORT_SYMBOL_GPL(chsc_sadc); static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) { spin_lock_irq(sch->lock); if (sch->driver && sch->driver->chp_event) if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0) goto out_unreg; spin_unlock_irq(sch->lock); return 0; out_unreg: sch->lpm = 0; spin_unlock_irq(sch->lock); css_schedule_eval(sch->schid); return 0; } void chsc_chp_offline(struct chp_id chpid) { struct channel_path *chp = chpid_to_chp(chpid); struct chp_link link; char dbf_txt[15]; sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); CIO_TRACE_EVENT(2, dbf_txt); if (chp_get_status(chpid) <= 0) return; memset(&link, 0, sizeof(struct chp_link)); link.chpid = chpid; /* Wait until previous actions have settled. */ css_wait_for_slow_path(); mutex_lock(&chp->lock); chp_update_desc(chp); mutex_unlock(&chp->lock); for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link); } static int __s390_process_res_acc(struct subchannel *sch, void *data) { spin_lock_irq(sch->lock); if (sch->driver && sch->driver->chp_event) sch->driver->chp_event(sch, data, CHP_ONLINE); spin_unlock_irq(sch->lock); return 0; } static void s390_process_res_acc(struct chp_link *link) { char dbf_txt[15]; sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid, link->chpid.id); CIO_TRACE_EVENT( 2, dbf_txt); if (link->fla != 0) { sprintf(dbf_txt, "fla%x", link->fla); CIO_TRACE_EVENT( 2, dbf_txt); } /* Wait until previous actions have settled. */ css_wait_for_slow_path(); /* * I/O resources may have become accessible. * Scan through all subchannels that may be concerned and * do a validation on those. * The more information we have (info), the less scanning * will we have to do. */ for_each_subchannel_staged(__s390_process_res_acc, NULL, link); css_schedule_reprobe(); } struct chsc_sei_nt0_area { u8 flags; u8 vf; /* validity flags */ u8 rs; /* reporting source */ u8 cc; /* content code */ u16 fla; /* full link address */ u16 rsid; /* reporting source id */ u32 reserved1; u32 reserved2; /* ccdf has to be big enough for a link-incident record */ u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */ } __packed; struct chsc_sei_nt2_area { u8 flags; /* p and v bit */ u8 reserved1; u8 reserved2; u8 cc; /* content code */ u32 reserved3[13]; u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */ } __packed; #define CHSC_SEI_NT0 (1ULL << 63) #define CHSC_SEI_NT2 (1ULL << 61) struct chsc_sei { struct chsc_header request; u32 reserved1; u64 ntsm; /* notification type mask */ struct chsc_header response; u32 :24; u8 nt; union { struct chsc_sei_nt0_area nt0_area; struct chsc_sei_nt2_area nt2_area; u8 nt_area[PAGE_SIZE - 24]; } u; } __packed __aligned(PAGE_SIZE); /* * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands" */ #define ND_VALIDITY_VALID 0 #define ND_VALIDITY_OUTDATED 1 #define ND_VALIDITY_INVALID 2 struct node_descriptor { /* Flags. */ union { struct { u32 validity:3; u32 reserved:5; } __packed; u8 byte0; } __packed; /* Node parameters. */ u32 params:24; /* Node ID. */ char type[6]; char model[3]; char manufacturer[3]; char plant[2]; char seq[12]; u16 tag; } __packed; /* * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface" */ #define LIR_IQ_CLASS_INFO 0 #define LIR_IQ_CLASS_DEGRADED 1 #define LIR_IQ_CLASS_NOT_OPERATIONAL 2 struct lir { struct { u32 null:1; u32 reserved:3; u32 class:2; u32 reserved2:2; } __packed iq; u32 ic:8; u32 reserved:16; struct node_descriptor incident_node; struct node_descriptor attached_node; u8 reserved2[32]; } __packed; #define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */ #define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ /* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */ static char *store_ebcdic(char *dest, const char *src, unsigned long len, char delim) { memcpy(dest, src, len); EBCASC(dest, len); if (delim) dest[len++] = delim; return dest + len; } /* Format node ID and parameters for output in LIR log message. */ static void format_node_data(char *params, char *id, struct node_descriptor *nd) { memset(params, 0, PARAMS_LEN); memset(id, 0, NODEID_LEN); if (nd->validity != ND_VALIDITY_VALID) { strncpy(params, "n/a", PARAMS_LEN - 1); strncpy(id, "n/a", NODEID_LEN - 1); return; } /* PARAMS=xx,xxxxxx */ snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params); /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */ id = store_ebcdic(id, nd->type, sizeof(nd->type), '/'); id = store_ebcdic(id, nd->model, sizeof(nd->model), ','); id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.'); id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0); id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ','); sprintf(id, "%04X", nd->tag); } static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area) { struct lir *lir = (struct lir *) &sei_area->ccdf; char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN], aunodeid[NODEID_LEN]; CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n", sei_area->rs, sei_area->rsid, sei_area->ccdf[0]); /* Ignore NULL Link Incident Records. */ if (lir->iq.null) return; /* Inform user that a link requires maintenance actions because it has * become degraded or not operational. Note that this log message is * the primary intention behind a Link Incident Record. */ format_node_data(iuparams, iunodeid, &lir->incident_node); format_node_data(auparams, aunodeid, &lir->attached_node); switch (lir->iq.class) { case LIR_IQ_CLASS_DEGRADED: pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x " "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", sei_area->rs, sei_area->rsid, lir->ic, iuparams, iunodeid, auparams, aunodeid); break; case LIR_IQ_CLASS_NOT_OPERATIONAL: pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x " "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n", sei_area->rs, sei_area->rsid, lir->ic, iuparams, iunodeid, auparams, aunodeid); break; default: break; } } static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area) { struct channel_path *chp; struct chp_link link; struct chp_id chpid; int status; CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, " "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); if (sei_area->rs != 4) return; chp_id_init(&chpid); chpid.id = sei_area->rsid; /* allocate a new channel path structure, if needed */ status = chp_get_status(chpid); if (!status) return; if (status < 0) { chp_new(chpid); } else { chp = chpid_to_chp(chpid); mutex_lock(&chp->lock); chp_update_desc(chp); mutex_unlock(&chp->lock); } memset(&link, 0, sizeof(struct chp_link)); link.chpid = chpid; if ((sei_area->vf & 0xc0) != 0) { link.fla = sei_area->fla; if ((sei_area->vf & 0xc0) == 0xc0) /* full link address */ link.fla_mask = 0xffff; else /* link address */ link.fla_mask = 0xff00; } s390_process_res_acc(&link); } static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area) { struct channel_path *chp; struct chp_id chpid; u8 *data; int num; CIO_CRW_EVENT(4, "chsc: channel path availability information\n"); if (sei_area->rs != 0) return; data = sei_area->ccdf; chp_id_init(&chpid); for (num = 0; num <= __MAX_CHPID; num++) { if (!chp_test_bit(data, num)) continue; chpid.id = num; CIO_CRW_EVENT(4, "Update information for channel path " "%x.%02x\n", chpid.cssid, chpid.id); chp = chpid_to_chp(chpid); if (!chp) { chp_new(chpid); continue; } mutex_lock(&chp->lock); chp_update_desc(chp); mutex_unlock(&chp->lock); } } struct chp_config_data { u8 map[32]; u8 op; u8 pc; }; static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area) { struct chp_config_data *data; struct chp_id chpid; int num; char *events[3] = {"configure", "deconfigure", "cancel deconfigure"}; CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n"); if (sei_area->rs != 0) return; data = (struct chp_config_data *) &(sei_area->ccdf); chp_id_init(&chpid); for (num = 0; num <= __MAX_CHPID; num++) { if (!chp_test_bit(data->map, num)) continue; chpid.id = num; pr_notice("Processing %s for channel path %x.%02x\n", events[data->op], chpid.cssid, chpid.id); switch (data->op) { case 0: chp_cfg_schedule(chpid, 1); break; case 1: chp_cfg_schedule(chpid, 0); break; case 2: chp_cfg_cancel_deconfigure(chpid); break; } } } static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) { int ret; CIO_CRW_EVENT(4, "chsc: scm change notification\n"); if (sei_area->rs != 7) return; ret = scm_update_information(); if (ret) CIO_CRW_EVENT(0, "chsc: updating change notification" " failed (rc=%d).\n", ret); } static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area) { int ret; CIO_CRW_EVENT(4, "chsc: scm available information\n"); if (sei_area->rs != 7) return; ret = scm_process_availability_information(); if (ret) CIO_CRW_EVENT(0, "chsc: process availability information" " failed (rc=%d).\n", ret); } static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) { switch (sei_area->cc) { case 1: zpci_event_error(sei_area->ccdf); break; case 2: zpci_event_availability(sei_area->ccdf); break; default: CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n", sei_area->cc); break; } } static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) { /* which kind of information was stored? */ switch (sei_area->cc) { case 1: /* link incident*/ chsc_process_sei_link_incident(sei_area); break; case 2: /* i/o resource accessibility */ chsc_process_sei_res_acc(sei_area); break; case 7: /* channel-path-availability information */ chsc_process_sei_chp_avail(sei_area); break; case 8: /* channel-path-configuration notification */ chsc_process_sei_chp_config(sei_area); break; case 12: /* scm change notification */ chsc_process_sei_scm_change(sei_area); break; case 14: /* scm available notification */ chsc_process_sei_scm_avail(sei_area); break; default: /* other stuff */ CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", sei_area->cc); break; } /* Check if we might have lost some information. */ if (sei_area->flags & 0x40) { CIO_CRW_EVENT(2, "chsc: event overflow\n"); css_schedule_eval_all(); } } static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm) { static int ntsm_unsupported; while (true) { memset(sei, 0, sizeof(*sei)); sei->request.length = 0x0010; sei->request.code = 0x000e; if (!ntsm_unsupported) sei->ntsm = ntsm; if (chsc(sei)) break; if (sei->response.code != 0x0001) { CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n", sei->response.code, sei->ntsm); if (sei->response.code == 3 && sei->ntsm) { /* Fallback for old firmware. */ ntsm_unsupported = 1; continue; } break; } CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt); switch (sei->nt) { case 0: chsc_process_sei_nt0(&sei->u.nt0_area); break; case 2: chsc_process_sei_nt2(&sei->u.nt2_area); break; default: CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt); break; } if (!(sei->u.nt0_area.flags & 0x80)) break; } } /* * Handle channel subsystem related CRWs. * Use store event information to find out what's going on. * * Note: Access to sei_page is serialized through machine check handler * thread, so no need for locking. */ static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow) { struct chsc_sei *sei = sei_page; if (overflow) { css_schedule_eval_all(); return; } CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, crw0->erc, crw0->rsid); CIO_TRACE_EVENT(2, "prcss"); chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2); } void chsc_chp_online(struct chp_id chpid) { struct channel_path *chp = chpid_to_chp(chpid); struct chp_link link; char dbf_txt[15]; sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); CIO_TRACE_EVENT(2, dbf_txt); if (chp_get_status(chpid) != 0) { memset(&link, 0, sizeof(struct chp_link)); link.chpid = chpid; /* Wait until previous actions have settled. */ css_wait_for_slow_path(); mutex_lock(&chp->lock); chp_update_desc(chp); mutex_unlock(&chp->lock); for_each_subchannel_staged(__s390_process_res_acc, NULL, &link); css_schedule_reprobe(); } } static void __s390_subchannel_vary_chpid(struct subchannel *sch, struct chp_id chpid, int on) { unsigned long flags; struct chp_link link; memset(&link, 0, sizeof(struct chp_link)); link.chpid = chpid; spin_lock_irqsave(sch->lock, flags); if (sch->driver && sch->driver->chp_event) sch->driver->chp_event(sch, &link, on ? CHP_VARY_ON : CHP_VARY_OFF); spin_unlock_irqrestore(sch->lock, flags); } static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data) { struct chp_id *chpid = data; __s390_subchannel_vary_chpid(sch, *chpid, 0); return 0; } static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data) { struct chp_id *chpid = data; __s390_subchannel_vary_chpid(sch, *chpid, 1); return 0; } /** * chsc_chp_vary - propagate channel-path vary operation to subchannels * @chpid: channl-path ID * @on: non-zero for vary online, zero for vary offline */ int chsc_chp_vary(struct chp_id chpid, int on) { struct channel_path *chp = chpid_to_chp(chpid); /* Wait until previous actions have settled. */ css_wait_for_slow_path(); /* * Redo PathVerification on the devices the chpid connects to */ if (on) { /* Try to update the channel path description. */ chp_update_desc(chp); for_each_subchannel_staged(s390_subchannel_vary_chpid_on, NULL, &chpid); css_schedule_reprobe(); } else for_each_subchannel_staged(s390_subchannel_vary_chpid_off, NULL, &chpid); return 0; } static void chsc_remove_cmg_attr(struct channel_subsystem *css) { int i; for (i = 0; i <= __MAX_CHPID; i++) { if (!css->chps[i]) continue; chp_remove_cmg_attr(css->chps[i]); } } static int chsc_add_cmg_attr(struct channel_subsystem *css) { int i, ret; ret = 0; for (i = 0; i <= __MAX_CHPID; i++) { if (!css->chps[i]) continue; ret = chp_add_cmg_attr(css->chps[i]); if (ret) goto cleanup; } return ret; cleanup: for (--i; i >= 0; i--) { if (!css->chps[i]) continue; chp_remove_cmg_attr(css->chps[i]); } return ret; } int __chsc_do_secm(struct channel_subsystem *css, int enable) { struct { struct chsc_header request; u32 operation_code : 2; u32 : 30; u32 key : 4; u32 : 28; u32 zeroes1; u32 cub_addr1; u32 zeroes2; u32 cub_addr2; u32 reserved[13]; struct chsc_header response; u32 status : 8; u32 : 4; u32 fmt : 4; u32 : 16; } *secm_area; unsigned long flags; int ret, ccode; spin_lock_irqsave(&chsc_page_lock, flags); memset(chsc_page, 0, PAGE_SIZE); secm_area = chsc_page; secm_area->request.length = 0x0050; secm_area->request.code = 0x0016; secm_area->key = PAGE_DEFAULT_KEY >> 4; secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1; secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2; secm_area->operation_code = enable ? 0 : 1; ccode = chsc(secm_area); if (ccode > 0) { ret = (ccode == 3) ? -ENODEV : -EBUSY; goto out; } switch (secm_area->response.code) { case 0x0102: case 0x0103: ret = -EINVAL; break; default: ret = chsc_error_from_response(secm_area->response.code); } if (ret != 0) CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n", secm_area->response.code); out: spin_unlock_irqrestore(&chsc_page_lock, flags); return ret; } int chsc_secm(struct channel_subsystem *css, int enable) { int ret; if (enable && !css->cm_enabled) { css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); if (!css->cub_addr1 || !css->cub_addr2) { free_page((unsigned long)css->cub_addr1); free_page((unsigned long)css->cub_addr2); return -ENOMEM; } } ret = __chsc_do_secm(css, enable); if (!ret) { css->cm_enabled = enable; if (css->cm_enabled) { ret = chsc_add_cmg_attr(css); if (ret) { __chsc_do_secm(css, 0); css->cm_enabled = 0; } } else chsc_remove_cmg_attr(css); } if (!css->cm_enabled) { free_page((unsigned long)css->cub_addr1); free_page((unsigned long)css->cub_addr2); } return ret; } int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, int c, int m, void *page) { struct chsc_scpd *scpd_area; int ccode, ret; if ((rfmt == 1 || rfmt == 0) && c == 1 && !css_general_characteristics.fcs) return -EINVAL; if ((rfmt == 2) && !css_general_characteristics.cib) return -EINVAL; if ((rfmt == 3) && !css_general_characteristics.util_str) return -EINVAL; memset(page, 0, PAGE_SIZE); scpd_area = page; scpd_area->request.length = 0x0010; scpd_area->request.code = 0x0002; scpd_area->cssid = chpid.cssid; scpd_area->first_chpid = chpid.id; scpd_area->last_chpid = chpid.id; scpd_area->m = m; scpd_area->c = c; scpd_area->fmt = fmt; scpd_area->rfmt = rfmt; ccode = chsc(scpd_area); if (ccode > 0) return (ccode == 3) ? -ENODEV : -EBUSY; ret = chsc_error_from_response(scpd_area->response.code); if (ret) CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n", scpd_area->response.code); return ret; } EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc); #define chsc_det_chp_desc(FMT, c) \ int chsc_determine_fmt##FMT##_channel_path_desc( \ struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \ { \ struct chsc_scpd *scpd_area; \ unsigned long flags; \ int ret; \ \ spin_lock_irqsave(&chsc_page_lock, flags); \ scpd_area = chsc_page; \ ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \ scpd_area); \ if (ret) \ goto out; \ \ memcpy(desc, scpd_area->data, sizeof(*desc)); \ out: \ spin_unlock_irqrestore(&chsc_page_lock, flags); \ return ret; \ } chsc_det_chp_desc(0, 0) chsc_det_chp_desc(1, 1) chsc_det_chp_desc(3, 0) static void chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, struct cmg_chars *chars) { int i, mask; for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { mask = 0x80 >> (i + 3); if (cmcv & mask) chp->cmg_chars.values[i] = chars->values[i]; else chp->cmg_chars.values[i] = 0; } } int chsc_get_channel_measurement_chars(struct channel_path *chp) { unsigned long flags; int ccode, ret; struct { struct chsc_header request; u32 : 24; u32 first_chpid : 8; u32 : 24; u32 last_chpid : 8; u32 zeroes1; struct chsc_header response; u32 zeroes2; u32 not_valid : 1; u32 shared : 1; u32 : 22; u32 chpid : 8; u32 cmcv : 5; u32 : 11; u32 cmgq : 8; u32 cmg : 8; u32 zeroes3; u32 data[NR_MEASUREMENT_CHARS]; } *scmc_area; chp->shared = -1; chp->cmg = -1; if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) return -EINVAL; spin_lock_irqsave(&chsc_page_lock, flags); memset(chsc_page, 0, PAGE_SIZE); scmc_area = chsc_page; scmc_area->request.length = 0x0010; scmc_area->request.code = 0x0022; scmc_area->first_chpid = chp->chpid.id; scmc_area->last_chpid = chp->chpid.id; ccode = chsc(scmc_area); if (ccode > 0) { ret = (ccode == 3) ? -ENODEV : -EBUSY; goto out; } ret = chsc_error_from_response(scmc_area->response.code); if (ret) { CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n", scmc_area->response.code); goto out; } if (scmc_area->not_valid) goto out; chp->cmg = scmc_area->cmg; chp->shared = scmc_area->shared; if (chp->cmg != 2 && chp->cmg != 3) { /* No cmg-dependent data. */ goto out; } chsc_initialize_cmg_chars(chp, scmc_area->cmcv, (struct cmg_chars *) &scmc_area->data); out: spin_unlock_irqrestore(&chsc_page_lock, flags); return ret; } int __init chsc_init(void) { int ret; sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); if (!sei_page || !chsc_page) { ret = -ENOMEM; goto out_err; } ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw); if (ret) goto out_err; return ret; out_err: free_page((unsigned long)chsc_page); free_page((unsigned long)sei_page); return ret; } void __init chsc_init_cleanup(void) { crw_unregister_handler(CRW_RSC_CSS); free_page((unsigned long)chsc_page); free_page((unsigned long)sei_page); } int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code) { int ret; sda_area->request.length = 0x0400; sda_area->request.code = 0x0031; sda_area->operation_code = operation_code; ret = chsc(sda_area); if (ret > 0) { ret = (ret == 3) ? -ENODEV : -EBUSY; goto out; } switch (sda_area->response.code) { case 0x0101: ret = -EOPNOTSUPP; break; default: ret = chsc_error_from_response(sda_area->response.code); } out: return ret; } int chsc_enable_facility(int operation_code) { struct chsc_sda_area *sda_area; unsigned long flags; int ret; spin_lock_irqsave(&chsc_page_lock, flags); memset(chsc_page, 0, PAGE_SIZE); sda_area = chsc_page; ret = __chsc_enable_facility(sda_area, operation_code); if (ret != 0) CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n", operation_code, sda_area->response.code); spin_unlock_irqrestore(&chsc_page_lock, flags); return ret; } int __init chsc_get_cssid(int idx) { struct { struct chsc_header request; u8 atype; u32 : 24; u32 reserved1[6]; struct chsc_header response; u32 reserved2[3]; struct { u8 cssid; u32 : 24; } list[0]; } *sdcal_area; int ret; spin_lock_irq(&chsc_page_lock); memset(chsc_page, 0, PAGE_SIZE); sdcal_area = chsc_page; sdcal_area->request.length = 0x0020; sdcal_area->request.code = 0x0034; sdcal_area->atype = 4; ret = chsc(sdcal_area); if (ret) { ret = (ret == 3) ? -ENODEV : -EBUSY; goto exit; } ret = chsc_error_from_response(sdcal_area->response.code); if (ret) { CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n", sdcal_area->response.code); goto exit; } if ((addr_t) &sdcal_area->list[idx] < (addr_t) &sdcal_area->response + sdcal_area->response.length) ret = sdcal_area->list[idx].cssid; else ret = -ENODEV; exit: spin_unlock_irq(&chsc_page_lock); return ret; } struct css_general_char css_general_characteristics; struct css_chsc_char css_chsc_characteristics; int __init chsc_determine_css_characteristics(void) { unsigned long flags; int result; struct { struct chsc_header request; u32 reserved1; u32 reserved2; u32 reserved3; struct chsc_header response; u32 reserved4; u32 general_char[510]; u32 chsc_char[508]; } *scsc_area; spin_lock_irqsave(&chsc_page_lock, flags); memset(chsc_page, 0, PAGE_SIZE); scsc_area = chsc_page; scsc_area->request.length = 0x0010; scsc_area->request.code = 0x0010; result = chsc(scsc_area); if (result) { result = (result == 3) ? -ENODEV : -EBUSY; goto exit; } result = chsc_error_from_response(scsc_area->response.code); if (result == 0) { memcpy(&css_general_characteristics, scsc_area->general_char, sizeof(css_general_characteristics)); memcpy(&css_chsc_characteristics, scsc_area->chsc_char, sizeof(css_chsc_characteristics)); } else CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n", scsc_area->response.code); exit: spin_unlock_irqrestore(&chsc_page_lock, flags); return result; } EXPORT_SYMBOL_GPL(css_general_characteristics); EXPORT_SYMBOL_GPL(css_chsc_characteristics); int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta) { struct { struct chsc_header request; unsigned int rsvd0; unsigned int op : 8; unsigned int rsvd1 : 8; unsigned int ctrl : 16; unsigned int rsvd2[5]; struct chsc_header response; unsigned int rsvd3[3]; u64 clock_delta; unsigned int rsvd4[2]; } *rr; int rc; memset(page, 0, PAGE_SIZE); rr = page; rr->request.length = 0x0020; rr->request.code = 0x0033; rr->op = op; rr->ctrl = ctrl; rc = chsc(rr); if (rc) return -EIO; rc = (rr->response.code == 0x0001) ? 0 : -EIO; if (clock_delta) *clock_delta = rr->clock_delta; return rc; } int chsc_sstpi(void *page, void *result, size_t size) { struct { struct chsc_header request; unsigned int rsvd0[3]; struct chsc_header response; char data[]; } *rr; int rc; memset(page, 0, PAGE_SIZE); rr = page; rr->request.length = 0x0010; rr->request.code = 0x0038; rc = chsc(rr); if (rc) return -EIO; memcpy(result, &rr->data, size); return (rr->response.code == 0x0001) ? 0 : -EIO; } int chsc_siosl(struct subchannel_id schid) { struct { struct chsc_header request; u32 word1; struct subchannel_id sid; u32 word3; struct chsc_header response; u32 word[11]; } *siosl_area; unsigned long flags; int ccode; int rc; spin_lock_irqsave(&chsc_page_lock, flags); memset(chsc_page, 0, PAGE_SIZE); siosl_area = chsc_page; siosl_area->request.length = 0x0010; siosl_area->request.code = 0x0046; siosl_area->word1 = 0x80000000; siosl_area->sid = schid; ccode = chsc(siosl_area); if (ccode > 0) { if (ccode == 3) rc = -ENODEV; else rc = -EBUSY; CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n", schid.ssid, schid.sch_no, ccode); goto out; } rc = chsc_error_from_response(siosl_area->response.code); if (rc) CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n", schid.ssid, schid.sch_no, siosl_area->response.code); else CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n", schid.ssid, schid.sch_no); out: spin_unlock_irqrestore(&chsc_page_lock, flags); return rc; } EXPORT_SYMBOL_GPL(chsc_siosl); /** * chsc_scm_info() - store SCM information (SSI) * @scm_area: request and response block for SSI * @token: continuation token * * Returns 0 on success. */ int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token) { int ccode, ret; memset(scm_area, 0, sizeof(*scm_area)); scm_area->request.length = 0x0020; scm_area->request.code = 0x004C; scm_area->reqtok = token; ccode = chsc(scm_area); if (ccode > 0) { ret = (ccode == 3) ? -ENODEV : -EBUSY; goto out; } ret = chsc_error_from_response(scm_area->response.code); if (ret != 0) CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n", scm_area->response.code); out: return ret; } EXPORT_SYMBOL_GPL(chsc_scm_info); /** * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info. * @schid: id of the subchannel on which PNSO is performed * @brinfo_area: request and response block for the operation * @resume_token: resume token for multiblock response * @cnc: Boolean change-notification control * * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL) * * Returns 0 on success. */ int chsc_pnso_brinfo(struct subchannel_id schid, struct chsc_pnso_area *brinfo_area, struct chsc_brinfo_resume_token resume_token, int cnc) { memset(brinfo_area, 0, sizeof(*brinfo_area)); brinfo_area->request.length = 0x0030; brinfo_area->request.code = 0x003d; /* network-subchannel operation */ brinfo_area->m = schid.m; brinfo_area->ssid = schid.ssid; brinfo_area->sch = schid.sch_no; brinfo_area->cssid = schid.cssid; brinfo_area->oc = 0; /* Store-network-bridging-information list */ brinfo_area->resume_token = resume_token; brinfo_area->n = (cnc != 0); if (chsc(brinfo_area)) return -EIO; return chsc_error_from_response(brinfo_area->response.code); } EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);
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