diff options
Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 132 |
1 files changed, 124 insertions, 8 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 773b3fe275b2..49f9d221e23d 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -6,6 +6,8 @@ * Martin Schwidefsky <schwidefsky@de.ibm.com> * Bugreports.to..: <Linux390@de.ibm.com> * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 + * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 + * Author.........: Nigel Hislop <hislop_nigel@emc.com> * */ @@ -84,7 +86,7 @@ dasd_eckd_probe (struct ccw_device *cdev) if (ret) { printk(KERN_WARNING "dasd_eckd_probe: could not set ccw-device options " - "for %s\n", cdev->dev.bus_id); + "for %s\n", dev_name(&cdev->dev)); return ret; } ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); @@ -1501,12 +1503,27 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, return; } - /* just report other unsolicited interrupts */ - DEV_MESSAGE(KERN_DEBUG, device, "%s", - "unsolicited interrupt received"); - device->discipline->dump_sense(device, NULL, irb); - dasd_schedule_device_bh(device); + if ((irb->scsw.cmd.cc == 1) && + (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && + (irb->scsw.cmd.actl & SCSW_ACTL_START_PEND) && + (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND)) { + /* fake irb do nothing, they are handled elsewhere */ + dasd_schedule_device_bh(device); + return; + } + + if (!(irb->esw.esw0.erw.cons)) { + /* just report other unsolicited interrupts */ + DEV_MESSAGE(KERN_ERR, device, "%s", + "unsolicited interrupt received"); + } else { + DEV_MESSAGE(KERN_ERR, device, "%s", + "unsolicited interrupt received " + "(sense available)"); + device->discipline->dump_sense(device, NULL, irb); + } + dasd_schedule_device_bh(device); return; }; @@ -2068,6 +2085,103 @@ dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) return 0; } +/* + * Issue syscall I/O to EMC Symmetrix array. + * CCWs are PSF and RSSD + */ +static int dasd_symm_io(struct dasd_device *device, void __user *argp) +{ + struct dasd_symmio_parms usrparm; + char *psf_data, *rssd_result; + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int rc; + + /* Copy parms from caller */ + rc = -EFAULT; + if (copy_from_user(&usrparm, argp, sizeof(usrparm))) + goto out; +#ifndef CONFIG_64BIT + /* Make sure pointers are sane even on 31 bit. */ + if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) { + rc = -EINVAL; + goto out; + } +#endif + /* alloc I/O data area */ + psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); + rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); + if (!psf_data || !rssd_result) { + rc = -ENOMEM; + goto out_free; + } + + /* get syscall header from user space */ + rc = -EFAULT; + if (copy_from_user(psf_data, + (void __user *)(unsigned long) usrparm.psf_data, + usrparm.psf_data_len)) + goto out_free; + + /* sanity check on syscall header */ + if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { + rc = -EINVAL; + goto out_free; + } + + /* setup CCWs for PSF + RSSD */ + cqr = dasd_smalloc_request("ECKD", 2 , 0, device); + if (IS_ERR(cqr)) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "Could not allocate initialization request"); + rc = PTR_ERR(cqr); + goto out_free; + } + + cqr->startdev = device; + cqr->memdev = device; + cqr->retries = 3; + cqr->expires = 10 * HZ; + cqr->buildclk = get_clock(); + cqr->status = DASD_CQR_FILLED; + + /* Build the ccws */ + ccw = cqr->cpaddr; + + /* PSF ccw */ + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->count = usrparm.psf_data_len; + ccw->flags |= CCW_FLAG_CC; + ccw->cda = (__u32)(addr_t) psf_data; + + ccw++; + + /* RSSD ccw */ + ccw->cmd_code = DASD_ECKD_CCW_RSSD; + ccw->count = usrparm.rssd_result_len; + ccw->flags = CCW_FLAG_SLI ; + ccw->cda = (__u32)(addr_t) rssd_result; + + rc = dasd_sleep_on(cqr); + if (rc) + goto out_sfree; + + rc = -EFAULT; + if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, + rssd_result, usrparm.rssd_result_len)) + goto out_sfree; + rc = 0; + +out_sfree: + dasd_sfree_request(cqr, cqr->memdev); +out_free: + kfree(rssd_result); + kfree(psf_data); +out: + DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); + return rc; +} + static int dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) { @@ -2086,6 +2200,8 @@ dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) return dasd_eckd_reserve(device); case BIODASDSLCK: return dasd_eckd_steal_lock(device); + case BIODASDSYMMIO: + return dasd_symm_io(device, argp); default: return -ENOIOCTLCMD; } @@ -2145,13 +2261,13 @@ static void dasd_eckd_dump_sense(struct dasd_device *device, /* dump the sense data */ len = sprintf(page, KERN_ERR PRINTK_HEADER " I/O status report for device %s:\n", - device->cdev->dev.bus_id); + dev_name(&device->cdev->dev)); len += sprintf(page + len, KERN_ERR PRINTK_HEADER " in req: %p CS: 0x%02X DS: 0x%02X\n", req, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); len += sprintf(page + len, KERN_ERR PRINTK_HEADER " device %s: Failing CCW: %p\n", - device->cdev->dev.bus_id, + dev_name(&device->cdev->dev), (void *) (addr_t) irb->scsw.cmd.cpa); if (irb->esw.esw0.erw.cons) { for (sl = 0; sl < 4; sl++) { |