#include <asm/idals.h>
#include <asm/ebcdic.h>
#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/cio.h>
#include <asm/ccwdev.h>
#include <asm/itcw.h>
private->conf_data = NULL;
private->conf_len = 0;
for (i = 0; i < 8; i++) {
- kfree(private->path_conf_data[i]);
- private->path_conf_data[i] = NULL;
+ kfree(device->path[i].conf_data);
+ device->path[i].conf_data = NULL;
+ device->path[i].cssid = 0;
+ device->path[i].ssid = 0;
+ device->path[i].chpid = 0;
}
}
int rc, path_err, pos;
__u8 lpm, opm;
struct dasd_eckd_private *private, path_private;
- struct dasd_path *path_data;
struct dasd_uid *uid;
char print_path_uid[60], print_device_uid[60];
+ struct channel_path_desc *chp_desc;
+ struct subchannel_id sch_id;
private = device->private;
- path_data = &device->path_data;
opm = ccw_device_get_path_mask(device->cdev);
+ ccw_device_get_schid(device->cdev, &sch_id);
conf_data_saved = 0;
path_err = 0;
/* get configuration data per operational path */
"No configuration data "
"retrieved");
/* no further analysis possible */
- path_data->opm |= lpm;
+ dasd_path_add_opm(device, opm);
continue; /* no error */
}
/* save first valid configuration data */
}
pos = pathmask_to_pos(lpm);
/* store per path conf_data */
- private->path_conf_data[pos] =
- (struct dasd_conf_data *) conf_data;
+ device->path[pos].conf_data = conf_data;
+ device->path[pos].cssid = sch_id.cssid;
+ device->path[pos].ssid = sch_id.ssid;
+ chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
+ if (chp_desc)
+ device->path[pos].chpid = chp_desc->chpid;
+ kfree(chp_desc);
/*
* build device UID that other path data
* can be compared to it
"device %s instead of %s\n", lpm,
print_path_uid, print_device_uid);
path_err = -EINVAL;
- path_data->cablepm |= lpm;
+ dasd_path_add_cablepm(device, lpm);
continue;
}
pos = pathmask_to_pos(lpm);
/* store per path conf_data */
- private->path_conf_data[pos] =
- (struct dasd_conf_data *) conf_data;
+ device->path[pos].conf_data = conf_data;
+ device->path[pos].cssid = sch_id.cssid;
+ device->path[pos].ssid = sch_id.ssid;
+ chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
+ if (chp_desc)
+ device->path[pos].chpid = chp_desc->chpid;
+ kfree(chp_desc);
path_private.conf_data = NULL;
path_private.conf_len = 0;
}
switch (dasd_eckd_path_access(conf_data, conf_len)) {
case 0x02:
- path_data->npm |= lpm;
+ dasd_path_add_nppm(device, lpm);
break;
case 0x03:
- path_data->ppm |= lpm;
+ dasd_path_add_ppm(device, lpm);
break;
}
- if (!path_data->opm) {
- path_data->opm = lpm;
+ if (!dasd_path_get_opm(device)) {
+ dasd_path_set_opm(device, lpm);
dasd_generic_path_operational(device);
} else {
- path_data->opm |= lpm;
+ dasd_path_add_opm(device, lpm);
}
- /*
- * if the path is used
- * it should not be in one of the negative lists
- */
- path_data->cablepm &= ~lpm;
- path_data->hpfpm &= ~lpm;
- path_data->cuirpm &= ~lpm;
}
return path_err;
}
+static u32 get_fcx_max_data(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private = device->private;
+ int fcx_in_css, fcx_in_gneq, fcx_in_features;
+ int tpm, mdc;
+
+ if (dasd_nofcx)
+ return 0;
+ /* is transport mode supported? */
+ fcx_in_css = css_general_characteristics.fcx;
+ fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
+ fcx_in_features = private->features.feature[40] & 0x80;
+ tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
+
+ if (!tpm)
+ return 0;
+
+ mdc = ccw_device_get_mdc(device->cdev, 0);
+ if (mdc < 0) {
+ dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
+ return 0;
+ } else {
+ return (u32)mdc * FCX_MAX_DATA_FACTOR;
+ }
+}
+
static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
{
struct dasd_eckd_private *private = device->private;
struct path_verification_work_data *data)
{
struct dasd_eckd_private *private = device->private;
- struct dasd_path *path_data = &device->path_data;
- __u8 lpm, opm = path_data->opm;
+ __u8 lpm, opm = dasd_path_get_opm(device);
int rc = -ENODEV;
for (lpm = 0x80; lpm; lpm >>= 1) {
* in other case the device UID may have changed and
* the first working path UID will be used as device UID
*/
- if (device->path_data.opm &&
+ if (dasd_path_get_opm(device) &&
dasd_eckd_compare_path_uid(device, &path_private)) {
/*
* the comparison was not successful
* situation in dasd_start_IO.
*/
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
- if (!device->path_data.opm && opm) {
- device->path_data.opm = opm;
- device->path_data.cablepm &= ~opm;
- device->path_data.cuirpm &= ~opm;
- device->path_data.hpfpm &= ~opm;
+ if (!dasd_path_get_opm(device) && opm) {
+ dasd_path_set_opm(device, opm);
dasd_generic_path_operational(device);
} else {
- device->path_data.opm |= opm;
- device->path_data.cablepm &= ~opm;
- device->path_data.cuirpm &= ~opm;
- device->path_data.hpfpm &= ~opm;
+ dasd_path_add_opm(device, opm);
}
- device->path_data.npm |= npm;
- device->path_data.ppm |= ppm;
- device->path_data.tbvpm |= epm;
- device->path_data.cablepm |= cablepm;
- device->path_data.hpfpm |= hpfpm;
+ dasd_path_add_nppm(device, npm);
+ dasd_path_add_ppm(device, ppm);
+ dasd_path_add_tbvpm(device, epm);
+ dasd_path_add_cablepm(device, cablepm);
+ dasd_path_add_nohpfpm(device, hpfpm);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
}
clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
return 0;
}
+static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
+{
+ struct dasd_eckd_private *private = device->private;
+ unsigned long flags;
+
+ if (!private->fcx_max_data)
+ private->fcx_max_data = get_fcx_max_data(device);
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
+ dasd_schedule_device_bh(device);
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+}
+
static int dasd_eckd_read_features(struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
dasd_put_device(device);
}
-static u32 get_fcx_max_data(struct dasd_device *device)
-{
- struct dasd_eckd_private *private = device->private;
- int fcx_in_css, fcx_in_gneq, fcx_in_features;
- int tpm, mdc;
-
- if (dasd_nofcx)
- return 0;
- /* is transport mode supported? */
- fcx_in_css = css_general_characteristics.fcx;
- fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
- fcx_in_features = private->features.feature[40] & 0x80;
- tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
-
- if (!tpm)
- return 0;
-
- mdc = ccw_device_get_mdc(device->cdev, 0);
- if (mdc < 0) {
- dev_warn(&device->cdev->dev, "Detecting the maximum supported"
- " data size for zHPF requests failed\n");
- return 0;
- } else
- return (u32)mdc * FCX_MAX_DATA_FACTOR;
-}
-
/*
* Check device characteristics.
* If the device is accessible using ECKD discipline, the device is enabled.
if (rc)
goto out_err1;
- /* set default timeout */
+ /* set some default values */
device->default_expires = DASD_EXPIRES;
- /* set default retry count */
device->default_retries = DASD_RETRIES;
+ device->path_thrhld = DASD_ECKD_PATH_THRHLD;
+ device->path_interval = DASD_ECKD_PATH_INTERVAL;
if (private->gneq) {
value = 1;
private->gneq = NULL;
private->conf_len = 0;
for (i = 0; i < 8; i++) {
- kfree(private->path_conf_data[i]);
- if ((__u8 *)private->path_conf_data[i] ==
+ kfree(device->path[i].conf_data);
+ if ((__u8 *)device->path[i].conf_data ==
private->conf_data) {
private->conf_data = NULL;
private->conf_len = 0;
}
- private->path_conf_data[i] = NULL;
+ device->path[i].conf_data = NULL;
+ device->path[i].cssid = 0;
+ device->path[i].ssid = 0;
+ device->path[i].chpid = 0;
}
kfree(private->conf_data);
private->conf_data = NULL;
DASD_ECKD_CCW_WRITE_CKD_MT;
ccw->flags = CCW_FLAG_SLI;
ccw->count = 8;
- ccw->cda = (__u32)(addr_t) ect;
- ccw++;
+ ccw->cda = (__u32)(addr_t) ect;
+ ccw++;
}
}
}
if (cqr->block && (cqr->startdev != cqr->block->base)) {
dasd_eckd_reset_ccw_to_base_io(cqr);
cqr->startdev = cqr->block->base;
- cqr->lpm = cqr->block->base->path_data.opm;
+ cqr->lpm = dasd_path_get_opm(cqr->block->base);
}
};
cqr->memdev = startdev;
cqr->block = block;
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
- cqr->lpm = startdev->path_data.ppm;
+ cqr->lpm = dasd_path_get_ppm(startdev);
cqr->retries = startdev->default_retries;
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
cqr->memdev = startdev;
cqr->block = block;
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
- cqr->lpm = startdev->path_data.ppm;
+ cqr->lpm = dasd_path_get_ppm(startdev);
cqr->retries = startdev->default_retries;
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
cqr->memdev = startdev;
cqr->block = block;
cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
- cqr->lpm = startdev->path_data.ppm;
+ cqr->lpm = dasd_path_get_ppm(startdev);
cqr->retries = startdev->default_retries;
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
cqr->memdev = startdev;
cqr->block = block;
cqr->expires = startdev->default_expires * HZ;
- cqr->lpm = startdev->path_data.ppm;
+ cqr->lpm = dasd_path_get_ppm(startdev);
cqr->retries = startdev->default_retries;
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
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,
+ irb->scsw.tm.fcxs,
+ (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
req ? req->intrc : 0);
len += sprintf(page + len, PRINTK_HEADER
" device %s: Failing TCW: %p\n",
*/
static int
dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
- __u32 message_id,
- struct channel_path_desc *desc,
- struct subchannel_id sch_id)
+ __u32 message_id, __u8 lpum)
{
struct dasd_psf_cuir_response *psf_cuir;
+ int pos = pathmask_to_pos(lpum);
struct dasd_ccw_req *cqr;
struct ccw1 *ccw;
int rc;
psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
psf_cuir->cc = response;
- if (desc)
- psf_cuir->chpid = desc->chpid;
+ psf_cuir->chpid = device->path[pos].chpid;
psf_cuir->message_id = message_id;
- psf_cuir->cssid = sch_id.cssid;
- psf_cuir->ssid = sch_id.ssid;
+ psf_cuir->cssid = device->path[pos].cssid;
+ psf_cuir->ssid = device->path[pos].ssid;
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_PSF;
ccw->cda = (__u32)(addr_t)psf_cuir;
__u8 lpum,
struct dasd_cuir_message *cuir)
{
- struct dasd_eckd_private *private = device->private;
struct dasd_conf_data *conf_data;
int path, pos;
if (cuir->record_selector == 0)
goto out;
for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
- conf_data = private->path_conf_data[pos];
+ conf_data = device->path[pos].conf_data;
if (conf_data->gneq.record_selector ==
cuir->record_selector)
return conf_data;
}
out:
- return private->path_conf_data[pathmask_to_pos(lpum)];
+ return device->path[pathmask_to_pos(lpum)].conf_data;
}
/*
static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
struct dasd_cuir_message *cuir)
{
- struct dasd_eckd_private *private = device->private;
struct dasd_conf_data *ref_conf_data;
unsigned long bitmask = 0, mask = 0;
struct dasd_conf_data *conf_data;
mask |= cuir->neq_map[1] << 8;
mask |= cuir->neq_map[0] << 16;
- for (path = 0x80; path; path >>= 1) {
+ for (path = 0; path < 8; path++) {
/* initialise data per path */
bitmask = mask;
- pos = pathmask_to_pos(path);
- conf_data = private->path_conf_data[pos];
+ conf_data = device->path[path].conf_data;
pos = 8 - ffs(cuir->ned_map);
ned = (char *) &conf_data->neds[pos];
/* compare reference ned and per path ned */
continue;
/* device and path match the reference values
add path to CUIR scope */
- tbcpm |= path;
+ tbcpm |= 0x80 >> path;
}
return tbcpm;
}
static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
- unsigned long paths,
- struct subchannel_id sch_id, int action)
+ unsigned long paths, int action)
{
- struct channel_path_desc *desc;
int pos;
while (paths) {
/* get position of bit in mask */
- pos = ffs(paths) - 1;
+ pos = 8 - ffs(paths);
/* get channel path descriptor from this position */
- desc = ccw_device_get_chp_desc(device->cdev, 7 - pos);
if (action == CUIR_QUIESCE)
- pr_warn("Service on the storage server caused path "
- "%x.%02x to go offline", sch_id.cssid,
- desc ? desc->chpid : 0);
+ pr_warn("Service on the storage server caused path %x.%02x to go offline",
+ device->path[pos].cssid,
+ device->path[pos].chpid);
else if (action == CUIR_RESUME)
- pr_info("Path %x.%02x is back online after service "
- "on the storage server", sch_id.cssid,
- desc ? desc->chpid : 0);
- kfree(desc);
- clear_bit(pos, &paths);
+ pr_info("Path %x.%02x is back online after service on the storage server",
+ device->path[pos].cssid,
+ device->path[pos].chpid);
+ clear_bit(7 - pos, &paths);
}
}
tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
/* nothing to do if path is not in use */
- if (!(device->path_data.opm & tbcpm))
+ if (!(dasd_path_get_opm(device) & tbcpm))
return 0;
- if (!(device->path_data.opm & ~tbcpm)) {
+ if (!(dasd_path_get_opm(device) & ~tbcpm)) {
/* no path would be left if the CUIR action is taken
return error */
return -EINVAL;
}
/* remove device from operational path mask */
- device->path_data.opm &= ~tbcpm;
- device->path_data.cuirpm |= tbcpm;
+ dasd_path_remove_opm(device, tbcpm);
+ dasd_path_add_cuirpm(device, tbcpm);
return tbcpm;
}
* notify the already set offline devices again
*/
static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
- struct subchannel_id sch_id,
struct dasd_cuir_message *cuir)
{
struct dasd_eckd_private *private = device->private;
}
}
/* notify user about all paths affected by CUIR action */
- dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE);
+ dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
return 0;
out_err:
return tbcpm;
}
static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
- struct subchannel_id sch_id,
struct dasd_cuir_message *cuir)
{
struct dasd_eckd_private *private = device->private;
alias_list) {
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
paths |= tbcpm;
- if (!(dev->path_data.opm & tbcpm)) {
- dev->path_data.tbvpm |= tbcpm;
+ if (!(dasd_path_get_opm(dev) & tbcpm)) {
+ dasd_path_add_tbvpm(dev, tbcpm);
dasd_schedule_device_bh(dev);
}
}
alias_list) {
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
paths |= tbcpm;
- if (!(dev->path_data.opm & tbcpm)) {
- dev->path_data.tbvpm |= tbcpm;
+ if (!(dasd_path_get_opm(dev) & tbcpm)) {
+ dasd_path_add_tbvpm(dev, tbcpm);
dasd_schedule_device_bh(dev);
}
}
alias_list) {
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
paths |= tbcpm;
- if (!(dev->path_data.opm & tbcpm)) {
- dev->path_data.tbvpm |= tbcpm;
+ if (!(dasd_path_get_opm(dev) & tbcpm)) {
+ dasd_path_add_tbvpm(dev, tbcpm);
dasd_schedule_device_bh(dev);
}
}
alias_list) {
tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
paths |= tbcpm;
- if (!(dev->path_data.opm & tbcpm)) {
- dev->path_data.tbvpm |= tbcpm;
+ if (!(dasd_path_get_opm(dev) & tbcpm)) {
+ dasd_path_add_tbvpm(dev, tbcpm);
dasd_schedule_device_bh(dev);
}
}
}
/* notify user about all paths affected by CUIR action */
- dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME);
+ dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
return 0;
}
__u8 lpum)
{
struct dasd_cuir_message *cuir = messages;
- struct channel_path_desc *desc;
- struct subchannel_id sch_id;
- int pos, response;
+ int response;
DBF_DEV_EVENT(DBF_WARNING, device,
"CUIR request: %016llx %016llx %016llx %08x",
((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
((u32 *)cuir)[3]);
- ccw_device_get_schid(device->cdev, &sch_id);
- pos = pathmask_to_pos(lpum);
- desc = ccw_device_get_chp_desc(device->cdev, pos);
if (cuir->code == CUIR_QUIESCE) {
/* quiesce */
- if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir))
+ if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
response = PSF_CUIR_LAST_PATH;
else
response = PSF_CUIR_COMPLETED;
} else if (cuir->code == CUIR_RESUME) {
/* resume */
- dasd_eckd_cuir_resume(device, lpum, sch_id, cuir);
+ dasd_eckd_cuir_resume(device, lpum, cuir);
response = PSF_CUIR_COMPLETED;
} else
response = PSF_CUIR_NOT_SUPPORTED;
dasd_eckd_psf_cuir_response(device, response,
- cuir->message_id, desc, sch_id);
+ cuir->message_id, lpum);
DBF_DEV_EVENT(DBF_WARNING, device,
"CUIR response: %d on message ID %08x", response,
cuir->message_id);
- /* free descriptor copy */
- kfree(desc);
/* to make sure there is no attention left schedule work again */
device->discipline->check_attention(device, lpum);
}
return 0;
}
+static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
+{
+ if (~lpum & dasd_path_get_opm(device)) {
+ dasd_path_add_nohpfpm(device, lpum);
+ dasd_path_remove_opm(device, lpum);
+ dev_err(&device->cdev->dev,
+ "Channel path %02X lost HPF functionality and is disabled\n",
+ lpum);
+ return 1;
+ }
+ return 0;
+}
+
+static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private = device->private;
+
+ dev_err(&device->cdev->dev,
+ "High Performance FICON disabled\n");
+ private->fcx_max_data = 0;
+}
+
+static int dasd_eckd_hpf_enabled(struct dasd_device *device)
+{
+ struct dasd_eckd_private *private = device->private;
+
+ return private->fcx_max_data ? 1 : 0;
+}
+
+static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
+ struct irb *irb)
+{
+ struct dasd_eckd_private *private = device->private;
+
+ if (!private->fcx_max_data) {
+ /* sanity check for no HPF, the error makes no sense */
+ DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+ "Trying to disable HPF for a non HPF device");
+ return;
+ }
+ if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
+ dasd_eckd_disable_hpf_device(device);
+ } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
+ if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
+ return;
+ dasd_eckd_disable_hpf_device(device);
+ dasd_path_set_tbvpm(device,
+ dasd_path_get_hpfpm(device));
+ }
+ /*
+ * prevent that any new I/O ist started on the device and schedule a
+ * requeue of existing requests
+ */
+ dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
+ dasd_schedule_requeue(device);
+}
+
static struct ccw_driver dasd_eckd_driver = {
.driver = {
.name = "dasd-eckd",
.check_attention = dasd_eckd_check_attention,
.host_access_count = dasd_eckd_host_access_count,
.hosts_print = dasd_hosts_print,
+ .handle_hpf_error = dasd_eckd_handle_hpf_error,
+ .disable_hpf = dasd_eckd_disable_hpf_device,
+ .hpf_enabled = dasd_eckd_hpf_enabled,
+ .reset_path = dasd_eckd_reset_path,
};
static int __init
projects / karo-tx-linux.git / blobdiff