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path: root/drivers/s390/block/dasd_eckd.c
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Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
-rw-r--r--drivers/s390/block/dasd_eckd.c235
1 files changed, 179 insertions, 56 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index ab84da5592e8..bf61274af3bb 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -82,6 +82,14 @@ static struct ccw_driver dasd_eckd_driver; /* see below */
#define INIT_CQR_UNFORMATTED 1
#define INIT_CQR_ERROR 2
+/* emergency request for reserve/release */
+static struct {
+ struct dasd_ccw_req cqr;
+ struct ccw1 ccw;
+ char data[32];
+} *dasd_reserve_req;
+static DEFINE_MUTEX(dasd_reserve_mutex);
+
/* initial attempt at a probe function. this can be simplified once
* the other detection code is gone */
@@ -1107,8 +1115,9 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
struct dasd_eckd_private *private;
struct dasd_block *block;
struct dasd_uid temp_uid;
- int is_known, rc;
+ int is_known, rc, i;
int readonly;
+ unsigned long value;
if (!ccw_device_is_pathgroup(device->cdev)) {
dev_warn(&device->cdev->dev,
@@ -1143,6 +1152,18 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
if (rc)
goto out_err1;
+ /* set default timeout */
+ device->default_expires = DASD_EXPIRES;
+ if (private->gneq) {
+ value = 1;
+ for (i = 0; i < private->gneq->timeout.value; i++)
+ value = 10 * value;
+ value = value * private->gneq->timeout.number;
+ /* do not accept useless values */
+ if (value != 0 && value <= DASD_EXPIRES_MAX)
+ device->default_expires = value;
+ }
+
/* Generate device unique id */
rc = dasd_eckd_generate_uid(device);
if (rc)
@@ -1169,7 +1190,7 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
goto out_err2;
}
/*
- * dasd_eckd_vaildate_server is done on the first device that
+ * dasd_eckd_validate_server is done on the first device that
* is found for an LCU. All later other devices have to wait
* for it, so they will read the correct feature codes.
*/
@@ -1195,7 +1216,7 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
"Read device characteristic failed, rc=%d", rc);
goto out_err3;
}
- /* find the vaild cylinder size */
+ /* find the valid cylinder size */
if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
private->rdc_data.long_no_cyl)
private->real_cyl = private->rdc_data.long_no_cyl;
@@ -1755,13 +1776,13 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
}
/* summary unit check */
- if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
- (irb->ecw[7] == 0x0D)) {
+ sense = dasd_get_sense(irb);
+ if (sense && (sense[7] == 0x0D) &&
+ (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
dasd_alias_handle_summary_unit_check(device, irb);
return;
}
- sense = dasd_get_sense(irb);
/* service information message SIM */
if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
@@ -1770,26 +1791,15 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
return;
}
- if ((scsw_cc(&irb->scsw) == 1) &&
- (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
- (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
- (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
+ if ((scsw_cc(&irb->scsw) == 1) && !sense &&
+ (scsw_fctl(&irb->scsw) == SCSW_FCTL_START_FUNC) &&
+ (scsw_actl(&irb->scsw) == SCSW_ACTL_START_PEND) &&
+ (scsw_stctl(&irb->scsw) == SCSW_STCTL_STATUS_PEND)) {
/* fake irb do nothing, they are handled elsewhere */
dasd_schedule_device_bh(device);
return;
}
- if (!sense) {
- /* just report other unsolicited interrupts */
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
- "unsolicited interrupt received");
- } else {
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
- "unsolicited interrupt received "
- "(sense available)");
- device->discipline->dump_sense_dbf(device, irb, "unsolicited");
- }
-
dasd_schedule_device_bh(device);
return;
};
@@ -1973,7 +1983,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
cqr->startdev = startdev;
cqr->memdev = startdev;
cqr->block = block;
- cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
cqr->lpm = private->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
@@ -2150,7 +2160,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
cqr->startdev = startdev;
cqr->memdev = startdev;
cqr->block = block;
- cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
cqr->lpm = private->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
@@ -2398,7 +2408,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
cqr->startdev = startdev;
cqr->memdev = startdev;
cqr->block = block;
- cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
cqr->lpm = private->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
@@ -2645,15 +2655,23 @@ dasd_eckd_release(struct dasd_device *device)
struct dasd_ccw_req *cqr;
int rc;
struct ccw1 *ccw;
+ int useglobal;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
+ useglobal = 0;
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
if (IS_ERR(cqr)) {
- DBF_DEV_EVENT(DBF_WARNING, device, "%s",
- "Could not allocate initialization request");
- return PTR_ERR(cqr);
+ mutex_lock(&dasd_reserve_mutex);
+ useglobal = 1;
+ cqr = &dasd_reserve_req->cqr;
+ memset(cqr, 0, sizeof(*cqr));
+ memset(&dasd_reserve_req->ccw, 0,
+ sizeof(dasd_reserve_req->ccw));
+ cqr->cpaddr = &dasd_reserve_req->ccw;
+ cqr->data = &dasd_reserve_req->data;
+ cqr->magic = DASD_ECKD_MAGIC;
}
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
@@ -2671,7 +2689,10 @@ dasd_eckd_release(struct dasd_device *device)
rc = dasd_sleep_on_immediatly(cqr);
- dasd_sfree_request(cqr, cqr->memdev);
+ if (useglobal)
+ mutex_unlock(&dasd_reserve_mutex);
+ else
+ dasd_sfree_request(cqr, cqr->memdev);
return rc;
}
@@ -2687,15 +2708,23 @@ dasd_eckd_reserve(struct dasd_device *device)
struct dasd_ccw_req *cqr;
int rc;
struct ccw1 *ccw;
+ int useglobal;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
+ useglobal = 0;
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
if (IS_ERR(cqr)) {
- DBF_DEV_EVENT(DBF_WARNING, device, "%s",
- "Could not allocate initialization request");
- return PTR_ERR(cqr);
+ mutex_lock(&dasd_reserve_mutex);
+ useglobal = 1;
+ cqr = &dasd_reserve_req->cqr;
+ memset(cqr, 0, sizeof(*cqr));
+ memset(&dasd_reserve_req->ccw, 0,
+ sizeof(dasd_reserve_req->ccw));
+ cqr->cpaddr = &dasd_reserve_req->ccw;
+ cqr->data = &dasd_reserve_req->data;
+ cqr->magic = DASD_ECKD_MAGIC;
}
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
@@ -2713,7 +2742,10 @@ dasd_eckd_reserve(struct dasd_device *device)
rc = dasd_sleep_on_immediatly(cqr);
- dasd_sfree_request(cqr, cqr->memdev);
+ if (useglobal)
+ mutex_unlock(&dasd_reserve_mutex);
+ else
+ dasd_sfree_request(cqr, cqr->memdev);
return rc;
}
@@ -2728,15 +2760,23 @@ dasd_eckd_steal_lock(struct dasd_device *device)
struct dasd_ccw_req *cqr;
int rc;
struct ccw1 *ccw;
+ int useglobal;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
+ useglobal = 0;
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
if (IS_ERR(cqr)) {
- DBF_DEV_EVENT(DBF_WARNING, device, "%s",
- "Could not allocate initialization request");
- return PTR_ERR(cqr);
+ mutex_lock(&dasd_reserve_mutex);
+ useglobal = 1;
+ cqr = &dasd_reserve_req->cqr;
+ memset(cqr, 0, sizeof(*cqr));
+ memset(&dasd_reserve_req->ccw, 0,
+ sizeof(dasd_reserve_req->ccw));
+ cqr->cpaddr = &dasd_reserve_req->ccw;
+ cqr->data = &dasd_reserve_req->data;
+ cqr->magic = DASD_ECKD_MAGIC;
}
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_SLCK;
@@ -2754,7 +2794,77 @@ dasd_eckd_steal_lock(struct dasd_device *device)
rc = dasd_sleep_on_immediatly(cqr);
- dasd_sfree_request(cqr, cqr->memdev);
+ if (useglobal)
+ mutex_unlock(&dasd_reserve_mutex);
+ else
+ dasd_sfree_request(cqr, cqr->memdev);
+ return rc;
+}
+
+/*
+ * SNID - Sense Path Group ID
+ * This ioctl may be used in situations where I/O is stalled due to
+ * a reserve, so if the normal dasd_smalloc_request fails, we use the
+ * preallocated dasd_reserve_req.
+ */
+static int dasd_eckd_snid(struct dasd_device *device,
+ void __user *argp)
+{
+ struct dasd_ccw_req *cqr;
+ int rc;
+ struct ccw1 *ccw;
+ int useglobal;
+ struct dasd_snid_ioctl_data usrparm;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
+ return -EFAULT;
+
+ useglobal = 0;
+ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
+ sizeof(struct dasd_snid_data), device);
+ if (IS_ERR(cqr)) {
+ mutex_lock(&dasd_reserve_mutex);
+ useglobal = 1;
+ cqr = &dasd_reserve_req->cqr;
+ memset(cqr, 0, sizeof(*cqr));
+ memset(&dasd_reserve_req->ccw, 0,
+ sizeof(dasd_reserve_req->ccw));
+ cqr->cpaddr = &dasd_reserve_req->ccw;
+ cqr->data = &dasd_reserve_req->data;
+ cqr->magic = DASD_ECKD_MAGIC;
+ }
+ ccw = cqr->cpaddr;
+ ccw->cmd_code = DASD_ECKD_CCW_SNID;
+ ccw->flags |= CCW_FLAG_SLI;
+ ccw->count = 12;
+ ccw->cda = (__u32)(addr_t) cqr->data;
+ cqr->startdev = device;
+ cqr->memdev = device;
+ clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+ set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
+ cqr->retries = 5;
+ cqr->expires = 10 * HZ;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+ cqr->lpm = usrparm.path_mask;
+
+ rc = dasd_sleep_on_immediatly(cqr);
+ /* verify that I/O processing didn't modify the path mask */
+ if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
+ rc = -EIO;
+ if (!rc) {
+ usrparm.data = *((struct dasd_snid_data *)cqr->data);
+ if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
+ rc = -EFAULT;
+ }
+
+ if (useglobal)
+ mutex_unlock(&dasd_reserve_mutex);
+ else
+ dasd_sfree_request(cqr, cqr->memdev);
return rc;
}
@@ -2993,6 +3103,8 @@ 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 BIODASDSNID:
+ return dasd_eckd_snid(device, argp);
case BIODASDSYMMIO:
return dasd_symm_io(device, argp);
default:
@@ -3039,19 +3151,19 @@ dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
char *reason)
{
u64 *sense;
+ u64 *stat;
sense = (u64 *) dasd_get_sense(irb);
+ stat = (u64 *) &irb->scsw;
if (sense) {
- DBF_DEV_EVENT(DBF_EMERG, device,
- "%s: %s %02x%02x%02x %016llx %016llx %016llx "
- "%016llx", reason,
- scsw_is_tm(&irb->scsw) ? "t" : "c",
- scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
- scsw_dstat(&irb->scsw), sense[0], sense[1],
- sense[2], sense[3]);
+ DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
+ "%016llx %016llx %016llx %016llx",
+ reason, *stat, *((u32 *) (stat + 1)),
+ sense[0], sense[1], sense[2], sense[3]);
} else {
- DBF_DEV_EVENT(DBF_EMERG, device, "%s",
- "SORRY - NO VALID SENSE AVAILABLE\n");
+ DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
+ reason, *stat, *((u32 *) (stat + 1)),
+ "NO VALID SENSE");
}
}
@@ -3077,9 +3189,12 @@ static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
" I/O status report for device %s:\n",
dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
- req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
- scsw_cc(&irb->scsw), req ? req->intrc : 0);
+ " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
+ "CS:%02X RC:%d\n",
+ req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
+ scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
+ scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
+ req ? req->intrc : 0);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing CCW: %p\n",
dev_name(&device->cdev->dev),
@@ -3180,11 +3295,13 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
" I/O status report for device %s:\n",
dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
- "fcxs: 0x%02X schxs: 0x%02X\n", req,
- scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
- scsw_cc(&irb->scsw), req->intrc,
- irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
+ " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
+ "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
+ req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
+ scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
+ scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
+ irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
+ req ? req->intrc : 0);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing TCW: %p\n",
dev_name(&device->cdev->dev),
@@ -3192,7 +3309,7 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
tsb = NULL;
sense = NULL;
- if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01))
+ if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
tsb = tcw_get_tsb(
(struct tcw *)(unsigned long)irb->scsw.tm.tcw);
@@ -3290,7 +3407,7 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
static void dasd_eckd_dump_sense(struct dasd_device *device,
struct dasd_ccw_req *req, struct irb *irb)
{
- if (req && scsw_is_tm(&req->irb.scsw))
+ if (scsw_is_tm(&irb->scsw))
dasd_eckd_dump_sense_tcw(device, req, irb);
else
dasd_eckd_dump_sense_ccw(device, req, irb);
@@ -3488,10 +3605,15 @@ dasd_eckd_init(void)
int ret;
ASCEBC(dasd_eckd_discipline.ebcname, 4);
+ dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
+ GFP_KERNEL | GFP_DMA);
+ if (!dasd_reserve_req)
+ return -ENOMEM;
ret = ccw_driver_register(&dasd_eckd_driver);
if (!ret)
wait_for_device_probe();
-
+ else
+ kfree(dasd_reserve_req);
return ret;
}
@@ -3499,6 +3621,7 @@ static void __exit
dasd_eckd_cleanup(void)
{
ccw_driver_unregister(&dasd_eckd_driver);
+ kfree(dasd_reserve_req);
}
module_init(dasd_eckd_init);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-03 14:08:12 +0200