From f3eb5384cf0325c02e306b1d81e70f81a03d7432 Mon Sep 17 00:00:00 2001 From: Stefan Weinhuber Date: Thu, 26 Mar 2009 15:23:48 +0100 Subject: [S390] dasd: add High Performance FICON support To support High Performance FICON, the DASD device driver has to translate I/O requests into the new transport mode control words (TCW) instead of the traditional (command mode) CCW requests. Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd_3990_erp.c | 141 ++++++++++++++++++++++++------------- 1 file changed, 94 insertions(+), 47 deletions(-) (limited to 'drivers/s390/block/dasd_3990_erp.c') diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c index d82aad5224f..4cee4591614 100644 --- a/drivers/s390/block/dasd_3990_erp.c +++ b/drivers/s390/block/dasd_3990_erp.c @@ -1561,6 +1561,13 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) cqr = cqr->refers; } + if (scsw_is_tm(&cqr->irb.scsw)) { + DBF_DEV_EVENT(DBF_WARNING, device, "%s", + "32 bit sense, action 1B is not defined" + " in transport mode - just retry"); + return default_erp; + } + /* for imprecise ending just do default erp */ if (sense[1] & 0x01) { @@ -1599,7 +1606,7 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) oldccw = cqr->cpaddr; if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { PFX_data = cqr->data; - memcpy(DE_data, &PFX_data->define_extend, + memcpy(DE_data, &PFX_data->define_extent, sizeof(struct DE_eckd_data)); } else memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data)); @@ -1712,6 +1719,13 @@ dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) cqr = cqr->refers; } + if (scsw_is_tm(&cqr->irb.scsw)) { + DBF_DEV_EVENT(DBF_WARNING, device, "%s", + "32 bit sense, action 1B, update," + " in transport mode - just retry"); + return previous_erp; + } + /* for imprecise ending just do default erp */ if (sense[1] & 0x01) { @@ -2171,7 +2185,7 @@ dasd_3990_erp_control_check(struct dasd_ccw_req *erp) { struct dasd_device *device = erp->startdev; - if (erp->refers->irb.scsw.cmd.cstat & (SCHN_STAT_INTF_CTRL_CHK + if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | SCHN_STAT_CHN_CTRL_CHK)) { DEV_MESSAGE(KERN_DEBUG, device, "%s", "channel or interface control check"); @@ -2193,21 +2207,23 @@ dasd_3990_erp_control_check(struct dasd_ccw_req *erp) * erp_new contens was possibly modified */ static struct dasd_ccw_req * -dasd_3990_erp_inspect(struct dasd_ccw_req * erp) +dasd_3990_erp_inspect(struct dasd_ccw_req *erp) { struct dasd_ccw_req *erp_new = NULL; - /* sense data are located in the refers record of the */ - /* already set up new ERP ! */ - char *sense = erp->refers->irb.ecw; + char *sense; /* if this problem occured on an alias retry on base */ erp_new = dasd_3990_erp_inspect_alias(erp); if (erp_new) return erp_new; - /* check if no concurrent sens is available */ - if (!erp->refers->irb.esw.esw0.erw.cons) + /* sense data are located in the refers record of the + * already set up new ERP ! + * check if concurrent sens is available + */ + sense = dasd_get_sense(&erp->refers->irb); + if (!sense) erp_new = dasd_3990_erp_control_check(erp); /* distinguish between 24 and 32 byte sense data */ else if (sense[27] & DASD_SENSE_BIT_0) { @@ -2231,7 +2247,11 @@ dasd_3990_erp_inspect(struct dasd_ccw_req * erp) * DESCRIPTION * This funtion adds an additional request block (ERP) to the head of * the given cqr (or erp). - * This erp is initialized as an default erp (retry TIC) + * For a command mode cqr the erp is initialized as an default erp + * (retry TIC). + * For transport mode we make a copy of the original TCW (points to + * the original TCCB, TIDALs, etc.) but give it a fresh + * TSB so the original sense data will not be changed. * * PARAMETER * cqr head of the current ERP-chain (or single cqr if @@ -2239,17 +2259,27 @@ dasd_3990_erp_inspect(struct dasd_ccw_req * erp) * RETURN VALUES * erp pointer to new ERP-chain head */ -static struct dasd_ccw_req * -dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr) +static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) { struct dasd_device *device = cqr->startdev; struct ccw1 *ccw; - - /* allocate additional request block */ struct dasd_ccw_req *erp; + int cplength, datasize; + struct tcw *tcw; + struct tsb *tsb; + + if (cqr->cpmode == 1) { + cplength = 0; + datasize = sizeof(struct tcw) + sizeof(struct tsb); + } else { + cplength = 2; + datasize = 0; + } - erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, device); + /* allocate additional request block */ + erp = dasd_alloc_erp_request((char *) &cqr->magic, + cplength, datasize, device); if (IS_ERR(erp)) { if (cqr->retries <= 0) { DEV_MESSAGE(KERN_ERR, device, "%s", @@ -2266,13 +2296,24 @@ dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr) return cqr; } - /* initialize request with default TIC to current ERP/CQR */ - ccw = erp->cpaddr; - ccw->cmd_code = CCW_CMD_NOOP; - ccw->flags = CCW_FLAG_CC; - ccw++; - ccw->cmd_code = CCW_CMD_TIC; - ccw->cda = (long)(cqr->cpaddr); + if (cqr->cpmode == 1) { + /* make a shallow copy of the original tcw but set new tsb */ + erp->cpmode = 1; + erp->cpaddr = erp->data; + tcw = erp->data; + tsb = (struct tsb *) &tcw[1]; + *tcw = *((struct tcw *)cqr->cpaddr); + tcw->tsb = (long)tsb; + } else { + /* initialize request with default TIC to current ERP/CQR */ + ccw = erp->cpaddr; + ccw->cmd_code = CCW_CMD_NOOP; + ccw->flags = CCW_FLAG_CC; + ccw++; + ccw->cmd_code = CCW_CMD_TIC; + ccw->cda = (long)(cqr->cpaddr); + } + erp->function = dasd_3990_erp_add_erp; erp->refers = cqr; erp->startdev = device; @@ -2282,7 +2323,6 @@ dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr) erp->expires = 0; erp->retries = 256; erp->buildclk = get_clock(); - erp->status = DASD_CQR_FILLED; return erp; @@ -2340,28 +2380,33 @@ dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) * match 'boolean' for match found * returns 1 if match found, otherwise 0. */ -static int -dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2) +static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, + struct dasd_ccw_req *cqr2) { + char *sense1, *sense2; if (cqr1->startdev != cqr2->startdev) return 0; - if (cqr1->irb.esw.esw0.erw.cons != cqr2->irb.esw.esw0.erw.cons) - return 0; + sense1 = dasd_get_sense(&cqr1->irb); + sense2 = dasd_get_sense(&cqr2->irb); - if ((cqr1->irb.esw.esw0.erw.cons == 0) && - (cqr2->irb.esw.esw0.erw.cons == 0)) { - if ((cqr1->irb.scsw.cmd.cstat & (SCHN_STAT_INTF_CTRL_CHK | - SCHN_STAT_CHN_CTRL_CHK)) == - (cqr2->irb.scsw.cmd.cstat & (SCHN_STAT_INTF_CTRL_CHK | - SCHN_STAT_CHN_CTRL_CHK))) + /* one request has sense data, the other not -> no match, return 0 */ + if (!sense1 != !sense2) + return 0; + /* no sense data in both cases -> check cstat for IFCC */ + if (!sense1 && !sense2) { + if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | + SCHN_STAT_CHN_CTRL_CHK)) == + (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | + SCHN_STAT_CHN_CTRL_CHK))) return 1; /* match with ifcc*/ } /* check sense data; byte 0-2,25,27 */ - if (!((memcmp (cqr1->irb.ecw, cqr2->irb.ecw, 3) == 0) && - (cqr1->irb.ecw[27] == cqr2->irb.ecw[27]) && - (cqr1->irb.ecw[25] == cqr2->irb.ecw[25]))) { + if (!(sense1 && sense2 && + (memcmp(sense1, sense2, 3) == 0) && + (sense1[27] == sense2[27]) && + (sense1[25] == sense2[25]))) { return 0; /* sense doesn't match */ } @@ -2434,7 +2479,7 @@ dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) { struct dasd_device *device = erp->startdev; - char *sense = erp->irb.ecw; + char *sense = dasd_get_sense(&erp->irb); /* check for 24 byte sense ERP */ if ((erp->function == dasd_3990_erp_bus_out) || @@ -2449,7 +2494,7 @@ dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) /* prepare erp for retry on different channel path */ erp = dasd_3990_erp_action_1(erp); - if (!(sense[2] & DASD_SENSE_BIT_0)) { + if (sense && !(sense[2] & DASD_SENSE_BIT_0)) { /* issue a Diagnostic Control command with an * Inhibit Write subcommand */ @@ -2479,10 +2524,11 @@ dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) } /* check for 32 byte sense ERP */ - } else if ((erp->function == dasd_3990_erp_compound_retry) || - (erp->function == dasd_3990_erp_compound_path) || - (erp->function == dasd_3990_erp_compound_code) || - (erp->function == dasd_3990_erp_compound_config)) { + } else if (sense && + ((erp->function == dasd_3990_erp_compound_retry) || + (erp->function == dasd_3990_erp_compound_path) || + (erp->function == dasd_3990_erp_compound_code) || + (erp->function == dasd_3990_erp_compound_config))) { erp = dasd_3990_erp_compound(erp, sense); @@ -2548,18 +2594,19 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, if (erp->retries > 0) { - char *sense = erp->refers->irb.ecw; + char *sense = dasd_get_sense(&erp->refers->irb); /* check for special retries */ - if (erp->function == dasd_3990_erp_action_4) { + if (sense && erp->function == dasd_3990_erp_action_4) { erp = dasd_3990_erp_action_4(erp, sense); - } else if (erp->function == dasd_3990_erp_action_1B_32) { + } else if (sense && + erp->function == dasd_3990_erp_action_1B_32) { erp = dasd_3990_update_1B(erp, sense); - } else if (erp->function == dasd_3990_erp_int_req) { + } else if (sense && erp->function == dasd_3990_erp_int_req) { erp = dasd_3990_erp_int_req(erp); @@ -2622,8 +2669,8 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr) } /* double-check if current erp/cqr was successful */ - if ((cqr->irb.scsw.cmd.cstat == 0x00) && - (cqr->irb.scsw.cmd.dstat == + if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && + (scsw_dstat(&cqr->irb.scsw) == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { DEV_MESSAGE(KERN_DEBUG, device, -- cgit v1.2.3