* 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>
*
*/
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);
memset(pfxdata, 0, sizeof(*pfxdata));
/* prefix data */
pfxdata->format = 0;
- pfxdata->base_address = basepriv->conf_data.ned1.unit_addr;
- pfxdata->base_lss = basepriv->conf_data.ned1.ID;
+ pfxdata->base_address = basepriv->ned->unit_addr;
+ pfxdata->base_lss = basepriv->ned->ID;
pfxdata->validity.define_extend = 1;
/* private uid is kept up to date, conf_data may be outdated */
/*
* Generate device unique id that specifies the physical device.
*/
-static int
-dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid)
+static int dasd_eckd_generate_uid(struct dasd_device *device,
+ struct dasd_uid *uid)
{
struct dasd_eckd_private *private;
- struct dasd_eckd_confdata *confdata;
+ int count;
private = (struct dasd_eckd_private *) device->private;
if (!private)
return -ENODEV;
- confdata = &private->conf_data;
- if (!confdata)
+ if (!private->ned || !private->gneq)
return -ENODEV;
memset(uid, 0, sizeof(struct dasd_uid));
- memcpy(uid->vendor, confdata->ned1.HDA_manufacturer,
+ memcpy(uid->vendor, private->ned->HDA_manufacturer,
sizeof(uid->vendor) - 1);
EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
- memcpy(uid->serial, confdata->ned1.HDA_location,
+ memcpy(uid->serial, private->ned->HDA_location,
sizeof(uid->serial) - 1);
EBCASC(uid->serial, sizeof(uid->serial) - 1);
- uid->ssid = confdata->neq.subsystemID;
- uid->real_unit_addr = confdata->ned1.unit_addr;
- if (confdata->ned2.sneq.flags == 0x40 &&
- confdata->ned2.sneq.format == 0x0001) {
- uid->type = confdata->ned2.sneq.sua_flags;
+ uid->ssid = private->gneq->subsystemID;
+ uid->real_unit_addr = private->ned->unit_addr;;
+ if (private->sneq) {
+ uid->type = private->sneq->sua_flags;
if (uid->type == UA_BASE_PAV_ALIAS)
- uid->base_unit_addr = confdata->ned2.sneq.base_unit_addr;
+ uid->base_unit_addr = private->sneq->base_unit_addr;
} else {
uid->type = UA_BASE_DEVICE;
}
+ if (private->vdsneq) {
+ for (count = 0; count < 16; count++) {
+ sprintf(uid->vduit+2*count, "%02x",
+ private->vdsneq->uit[count]);
+ }
+ }
return 0;
}
ret = -ENOMEM;
goto out_error;
}
+
+ /*
+ * buffer has to start with EBCDIC "V1.0" to show
+ * support for virtual device SNEQ
+ */
+ rcd_buf[0] = 0xE5;
+ rcd_buf[1] = 0xF1;
+ rcd_buf[2] = 0x4B;
+ rcd_buf[3] = 0xF0;
cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
if (IS_ERR(cqr)) {
ret = PTR_ERR(cqr);
return ret;
}
-static int
-dasd_eckd_read_conf(struct dasd_device *device)
+static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
+{
+
+ struct dasd_sneq *sneq;
+ int i, count;
+
+ private->ned = NULL;
+ private->sneq = NULL;
+ private->vdsneq = NULL;
+ private->gneq = NULL;
+ count = private->conf_len / sizeof(struct dasd_sneq);
+ sneq = (struct dasd_sneq *)private->conf_data;
+ for (i = 0; i < count; ++i) {
+ if (sneq->flags.identifier == 1 && sneq->format == 1)
+ private->sneq = sneq;
+ else if (sneq->flags.identifier == 1 && sneq->format == 4)
+ private->vdsneq = (struct vd_sneq *)sneq;
+ else if (sneq->flags.identifier == 2)
+ private->gneq = (struct dasd_gneq *)sneq;
+ else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
+ private->ned = (struct dasd_ned *)sneq;
+ sneq++;
+ }
+ if (!private->ned || !private->gneq) {
+ private->ned = NULL;
+ private->sneq = NULL;
+ private->vdsneq = NULL;
+ private->gneq = NULL;
+ return -EINVAL;
+ }
+ return 0;
+
+};
+
+static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
+{
+ struct dasd_gneq *gneq;
+ int i, count, found;
+
+ count = conf_len / sizeof(*gneq);
+ gneq = (struct dasd_gneq *)conf_data;
+ found = 0;
+ for (i = 0; i < count; ++i) {
+ if (gneq->flags.identifier == 2) {
+ found = 1;
+ break;
+ }
+ gneq++;
+ }
+ if (found)
+ return ((char *)gneq)[18] & 0x07;
+ else
+ return 0;
+}
+
+static int dasd_eckd_read_conf(struct dasd_device *device)
{
void *conf_data;
int conf_len, conf_data_saved;
path_data->opm = ccw_device_get_path_mask(device->cdev);
lpm = 0x80;
conf_data_saved = 0;
-
/* get configuration data per operational path */
for (lpm = 0x80; lpm; lpm>>= 1) {
if (lpm & path_data->opm){
"data retrieved");
continue; /* no error */
}
- if (conf_len != sizeof(struct dasd_eckd_confdata)) {
- MESSAGE(KERN_WARNING,
- "sizes of configuration data mismatch"
- "%d (read) vs %ld (expected)",
- conf_len,
- sizeof(struct dasd_eckd_confdata));
- kfree(conf_data);
- continue; /* no error */
- }
/* save first valid configuration data */
- if (!conf_data_saved){
- memcpy(&private->conf_data, conf_data,
- sizeof(struct dasd_eckd_confdata));
+ if (!conf_data_saved) {
+ kfree(private->conf_data);
+ private->conf_data = conf_data;
+ private->conf_len = conf_len;
+ if (dasd_eckd_identify_conf_parts(private)) {
+ private->conf_data = NULL;
+ private->conf_len = 0;
+ kfree(conf_data);
+ continue;
+ }
conf_data_saved++;
}
- switch (((char *)conf_data)[242] & 0x07){
+ switch (dasd_eckd_path_access(conf_data, conf_len)) {
case 0x02:
path_data->npm |= lpm;
break;
path_data->ppm |= lpm;
break;
}
- kfree(conf_data);
+ if (conf_data != private->conf_data)
+ kfree(conf_data);
}
}
return 0;
dasd_free_block(device->block);
device->block = NULL;
out_err1:
+ kfree(private->conf_data);
kfree(device->private);
device->private = NULL;
return rc;
static void dasd_eckd_uncheck_device(struct dasd_device *device)
{
+ struct dasd_eckd_private *private;
+
+ private = (struct dasd_eckd_private *) device->private;
dasd_alias_disconnect_device_from_lcu(device);
+ private->ned = NULL;
+ private->sneq = NULL;
+ private->vdsneq = NULL;
+ private->gneq = NULL;
+ private->conf_len = 0;
+ kfree(private->conf_data);
+ private->conf_data = NULL;
}
static struct dasd_ccw_req *
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;
};
info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
memcpy(info->characteristics, &private->rdc_data,
sizeof(struct dasd_eckd_characteristics));
- info->confdata_size = sizeof(struct dasd_eckd_confdata);
- memcpy(info->configuration_data, &private->conf_data,
- sizeof(struct dasd_eckd_confdata));
+ info->confdata_size = min((unsigned long)private->conf_len,
+ sizeof(info->configuration_data));
+ memcpy(info->configuration_data, private->conf_data,
+ info->confdata_size);
return 0;
}
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)
{
return dasd_eckd_reserve(device);
case BIODASDSLCK:
return dasd_eckd_steal_lock(device);
+ case BIODASDSYMMIO:
+ return dasd_symm_io(device, argp);
default:
return -ENOIOCTLCMD;
}
/* 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++) {
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